2 * Copyright (C) 2003 Benjamin Otte <in7y118@public.uni-hamburg.de>
3 * Copyright (C) 2005-2009 Tim-Philipp Müller <tim centricular net>
4 * Copyright (C) 2009 Sebastian Dröge <sebastian.droege@collabora.co.uk>
6 * gsttypefindfunctions.c: collection of various typefind functions
8 * This library is free software; you can redistribute it and/or
9 * modify it under the terms of the GNU Library General Public
10 * License as published by the Free Software Foundation; either
11 * version 2 of the License, or (at your option) any later version.
13 * This library is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16 * Library General Public License for more details.
18 * You should have received a copy of the GNU Library General Public
19 * License along with this library; if not, write to the
20 * Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
21 * Boston, MA 02110-1301, USA.
29 #include <glib/gprintf.h>
31 /* don't want to add gio xdgmime typefinder if gio was disabled via configure */
43 #include <gst/pbutils/pbutils.h>
44 #include <gst/base/gstbytereader.h>
46 GST_DEBUG_CATEGORY_STATIC (type_find_debug);
47 #define GST_CAT_DEFAULT type_find_debug
49 /* so our code stays ready for 0.11 */
50 #define gst_type_find_peek(tf,off,len) \
51 ((const guint8 *)gst_type_find_peek((tf),(off),(len)))
53 /* DataScanCtx: helper for typefind functions that scan through data
54 * step-by-step, to avoid doing a peek at each and every offset */
56 #define DATA_SCAN_CTX_CHUNK_SIZE 4096
66 data_scan_ctx_advance (GstTypeFind * tf, DataScanCtx * c, guint bytes_to_skip)
68 c->offset += bytes_to_skip;
69 if (G_LIKELY (c->size > bytes_to_skip)) {
70 c->size -= bytes_to_skip;
71 c->data += bytes_to_skip;
78 static inline gboolean
79 data_scan_ctx_ensure_data (GstTypeFind * tf, DataScanCtx * c, gint min_len)
83 guint chunk_len = MAX (DATA_SCAN_CTX_CHUNK_SIZE, min_len);
85 if (G_LIKELY (c->size >= min_len))
88 data = gst_type_find_peek (tf, c->offset, chunk_len);
89 if (G_LIKELY (data != NULL)) {
95 /* if there's less than our chunk size, try to get as much as we can, but
96 * always at least min_len bytes (we might be typefinding the first buffer
97 * of the stream and not have as much data available as we'd like) */
98 len = gst_type_find_get_length (tf);
100 len = CLAMP (len - c->offset, min_len, chunk_len);
105 data = gst_type_find_peek (tf, c->offset, len);
115 static inline gboolean
116 data_scan_ctx_memcmp (GstTypeFind * tf, DataScanCtx * c, guint offset,
117 const gchar * data, guint len)
119 if (!data_scan_ctx_ensure_data (tf, c, offset + len))
122 return (memcmp (c->data + offset, data, len) == 0);
126 static gboolean xml_check_first_element (GstTypeFind * tf,
127 const gchar * element, guint elen, gboolean strict);
128 static gboolean sdp_check_header (GstTypeFind * tf);
130 static GstStaticCaps utf8_caps = GST_STATIC_CAPS ("text/plain");
132 #define UTF8_CAPS gst_static_caps_get(&utf8_caps)
135 utf8_type_find_have_valid_utf8_at_offset (GstTypeFind * tf, guint64 offset,
136 GstTypeFindProbability * prob)
140 /* randomly decided values */
141 guint min_size = 16; /* minimum size */
142 guint size = 32 * 1024; /* starting size */
143 guint probability = 95; /* starting probability */
144 guint step = 10; /* how much we reduce probability in each
147 while (probability > step && size > min_size) {
148 data = gst_type_find_peek (tf, offset, size);
151 gchar *start = (gchar *) data;
153 if (g_utf8_validate (start, size, (const gchar **) &end) || (end - start + 4 > size)) { /* allow last char to be cut off */
168 utf8_type_find (GstTypeFind * tf, gpointer unused)
170 GstTypeFindProbability start_prob, mid_prob;
173 /* leave xml to the xml typefinders */
174 if (xml_check_first_element (tf, "", 0, TRUE))
177 /* leave sdp to the sdp typefinders */
178 if (sdp_check_header (tf))
181 /* check beginning of stream */
182 if (!utf8_type_find_have_valid_utf8_at_offset (tf, 0, &start_prob))
185 GST_LOG ("start is plain text with probability of %u", start_prob);
187 /* POSSIBLE is the highest probability we ever return if we can't
188 * probe into the middle of the file and don't know its length */
190 length = gst_type_find_get_length (tf);
191 if (length == 0 || length == (guint64) - 1) {
192 gst_type_find_suggest (tf, MIN (start_prob, GST_TYPE_FIND_POSSIBLE),
197 if (length < 64 * 1024) {
198 gst_type_find_suggest (tf, start_prob, UTF8_CAPS);
202 /* check middle of stream */
203 if (!utf8_type_find_have_valid_utf8_at_offset (tf, length / 2, &mid_prob))
206 GST_LOG ("middle is plain text with probability of %u", mid_prob);
207 gst_type_find_suggest (tf, (start_prob + mid_prob) / 2, UTF8_CAPS);
210 /*** text/utf-16 and text/utf-32} ***/
211 /* While UTF-8 is unicode too, using text/plain for UTF-16 and UTF-32
212 is going to break stuff. */
217 const char *const bom;
218 gboolean (*checker) (const guint8 *, gint, gint);
224 check_utf16 (const guint8 * data, gint len, gint endianness)
234 gst_byte_reader_init (&br, data, len);
236 /* test first for a single 16 bit value in the BMP */
237 if (endianness == G_BIG_ENDIAN)
238 high = gst_byte_reader_get_uint16_be_unchecked (&br);
240 high = gst_byte_reader_get_uint16_le_unchecked (&br);
241 if (high >= 0xD800 && high <= 0xDBFF) {
242 /* start of a surrogate pair */
246 if (endianness == G_BIG_ENDIAN)
247 low = gst_byte_reader_get_uint16_be_unchecked (&br);
249 low = gst_byte_reader_get_uint16_le_unchecked (&br);
250 if (low >= 0xDC00 && low <= 0xDFFF) {
251 /* second half of the surrogate pair */
255 if (high >= 0xDC00 && high <= 0xDFFF)
264 check_utf32 (const guint8 * data, gint len, gint endianness)
270 if (endianness == G_BIG_ENDIAN)
271 v = (data[0] << 24) | (data[1] << 16) | (data[2] << 8) | data[3];
273 v = (data[3] << 24) | (data[2] << 16) | (data[1] << 8) | data[0];
283 unicode_type_find (GstTypeFind * tf, const GstUnicodeTester * tester,
284 guint n_tester, const char *media_type, gboolean require_bom)
288 const guint8 *data = gst_type_find_peek (tf, 0, len);
290 const gint max_scan_size = 256 * 1024;
295 data = gst_type_find_peek (tf, 0, len);
300 /* find a large enough size that works */
301 while (len < max_scan_size) {
302 size_t newlen = len << 1;
303 const guint8 *newdata = gst_type_find_peek (tf, 0, newlen);
310 for (n = 0; n < n_tester; ++n) {
311 int bom_boost = 0, tmpprob;
312 if (len >= tester[n].bomlen) {
313 if (!memcmp (data, tester[n].bom, tester[n].bomlen))
314 bom_boost = tester[n].boost;
316 if (require_bom && bom_boost == 0)
318 if (!(*tester[n].checker) (data, len, tester[n].endianness))
320 tmpprob = GST_TYPE_FIND_POSSIBLE - 20 + bom_boost;
321 if (tmpprob > prob) {
323 endianness = tester[n].endianness;
328 GST_DEBUG ("This is valid %s %s", media_type,
329 endianness == G_BIG_ENDIAN ? "be" : "le");
330 gst_type_find_suggest_simple (tf, prob, media_type,
331 "endianness", G_TYPE_INT, endianness, NULL);
335 static GstStaticCaps utf16_caps = GST_STATIC_CAPS ("text/utf-16");
337 #define UTF16_CAPS gst_static_caps_get(&utf16_caps)
340 utf16_type_find (GstTypeFind * tf, gpointer unused)
342 static const GstUnicodeTester utf16tester[2] = {
343 {2, "\xff\xfe", check_utf16, 10, G_LITTLE_ENDIAN},
344 {2, "\xfe\xff", check_utf16, 20, G_BIG_ENDIAN},
346 unicode_type_find (tf, utf16tester, G_N_ELEMENTS (utf16tester),
347 "text/utf-16", TRUE);
350 static GstStaticCaps utf32_caps = GST_STATIC_CAPS ("text/utf-32");
352 #define UTF32_CAPS gst_static_caps_get(&utf32_caps)
355 utf32_type_find (GstTypeFind * tf, gpointer unused)
357 static const GstUnicodeTester utf32tester[2] = {
358 {4, "\xff\xfe\x00\x00", check_utf32, 10, G_LITTLE_ENDIAN},
359 {4, "\x00\x00\xfe\xff", check_utf32, 20, G_BIG_ENDIAN}
361 unicode_type_find (tf, utf32tester, G_N_ELEMENTS (utf32tester),
362 "text/utf-32", TRUE);
365 /*** text/uri-list ***/
367 static GstStaticCaps uri_caps = GST_STATIC_CAPS ("text/uri-list");
369 #define URI_CAPS (gst_static_caps_get(&uri_caps))
370 #define BUFFER_SIZE 16 /* If the string is < 16 bytes we're screwed */
371 #define INC_BUFFER { \
373 if (pos == BUFFER_SIZE) { \
375 offset += BUFFER_SIZE; \
376 data = gst_type_find_peek (tf, offset, BUFFER_SIZE); \
377 if (data == NULL) return; \
383 uri_type_find (GstTypeFind * tf, gpointer unused)
385 const guint8 *data = gst_type_find_peek (tf, 0, BUFFER_SIZE);
390 /* Search for # comment lines */
391 while (*data == '#') {
392 /* Goto end of line */
393 while (*data != '\n') {
400 if (!g_ascii_isalpha (*data)) {
401 /* Had a non alpha char - can't be uri-list */
407 while (g_ascii_isalnum (*data)) {
412 /* First non alpha char is not a : */
416 /* Get the next 2 bytes as well */
417 data = gst_type_find_peek (tf, offset + pos, 3);
421 if (data[1] != '/' && data[2] != '/') {
425 gst_type_find_suggest (tf, GST_TYPE_FIND_MAXIMUM, URI_CAPS);
429 /*** application/x-hls ***/
431 static GstStaticCaps hls_caps = GST_STATIC_CAPS ("application/x-hls");
432 #define HLS_CAPS (gst_static_caps_get(&hls_caps))
434 /* See http://tools.ietf.org/html/draft-pantos-http-live-streaming-05 */
436 hls_type_find (GstTypeFind * tf, gpointer unused)
438 DataScanCtx c = { 0, NULL, 0 };
440 if (G_UNLIKELY (!data_scan_ctx_ensure_data (tf, &c, 7)))
443 if (memcmp (c.data, "#EXTM3U", 7))
446 data_scan_ctx_advance (tf, &c, 7);
448 /* Check only the first 256 bytes */
449 while (c.offset < 256) {
450 if (G_UNLIKELY (!data_scan_ctx_ensure_data (tf, &c, 21)))
453 /* Search for # comment lines */
454 if (c.data[0] == '#' && (memcmp (c.data, "#EXT-X-TARGETDURATION", 21) == 0
455 || memcmp (c.data, "#EXT-X-STREAM-INF", 17) == 0)) {
456 gst_type_find_suggest (tf, GST_TYPE_FIND_MAXIMUM, HLS_CAPS);
460 data_scan_ctx_advance (tf, &c, 1);
465 /*** application/xml **********************************************************/
467 #define XML_BUFFER_SIZE 16
468 #define XML_INC_BUFFER { \
470 if (pos == XML_BUFFER_SIZE) { \
472 offset += XML_BUFFER_SIZE; \
473 data = gst_type_find_peek (tf, offset, XML_BUFFER_SIZE); \
474 if (data == NULL) return FALSE; \
481 xml_check_first_element (GstTypeFind * tf, const gchar * element, guint elen,
489 data = gst_type_find_peek (tf, 0, XML_BUFFER_SIZE);
493 /* look for the XMLDec
494 * see XML spec 2.8, Prolog and Document Type Declaration
495 * http://www.w3.org/TR/2004/REC-xml-20040204/#sec-prolog-dtd */
496 got_xmldec = (memcmp (data, "<?xml", 5) == 0);
498 if (strict && !got_xmldec)
501 /* skip XMLDec in any case if we've got one */
507 /* look for the first element, it has to be the requested element. Bail
508 * out if it is not within the first 4kB. */
509 while (data && (offset + pos) < 4096) {
510 while (*data != '<' && (offset + pos) < 4096) {
515 if (!g_ascii_isalpha (*data)) {
516 /* if not alphabetic, it's a PI or an element / attribute declaration
517 * like <?xxx or <!xxx */
522 /* the first normal element, check if it's the one asked for */
523 data = gst_type_find_peek (tf, offset + pos, elen + 1);
524 return (data && element && strncmp ((char *) data, element, elen) == 0);
530 static GstStaticCaps generic_xml_caps = GST_STATIC_CAPS ("application/xml");
532 #define GENERIC_XML_CAPS (gst_static_caps_get(&generic_xml_caps))
534 xml_type_find (GstTypeFind * tf, gpointer unused)
536 if (xml_check_first_element (tf, "", 0, TRUE)) {
537 gst_type_find_suggest (tf, GST_TYPE_FIND_MINIMUM, GENERIC_XML_CAPS);
541 /*** application/sdp *********************************************************/
543 static GstStaticCaps sdp_caps = GST_STATIC_CAPS ("application/sdp");
545 #define SDP_CAPS (gst_static_caps_get(&sdp_caps))
547 sdp_check_header (GstTypeFind * tf)
551 data = gst_type_find_peek (tf, 0, 5);
555 /* sdp must start with v=0[\r]\n */
556 if (memcmp (data, "v=0", 3))
559 if (data[3] == '\r' && data[4] == '\n')
568 sdp_type_find (GstTypeFind * tf, gpointer unused)
570 if (sdp_check_header (tf))
571 gst_type_find_suggest (tf, GST_TYPE_FIND_MAXIMUM, SDP_CAPS);
574 /*** application/smil *********************************************************/
576 static GstStaticCaps smil_caps = GST_STATIC_CAPS ("application/smil");
578 #define SMIL_CAPS (gst_static_caps_get(&smil_caps))
580 smil_type_find (GstTypeFind * tf, gpointer unused)
582 if (xml_check_first_element (tf, "smil", 4, FALSE)) {
583 gst_type_find_suggest (tf, GST_TYPE_FIND_MAXIMUM, SMIL_CAPS);
589 static GstStaticCaps html_caps = GST_STATIC_CAPS ("text/html");
591 #define HTML_CAPS gst_static_caps_get (&html_caps)
594 html_type_find (GstTypeFind * tf, gpointer unused)
596 const gchar *d, *data;
598 data = (const gchar *) gst_type_find_peek (tf, 0, 16);
602 if (!g_ascii_strncasecmp (data, "<!DOCTYPE HTML", 14)) {
603 gst_type_find_suggest (tf, GST_TYPE_FIND_MAXIMUM, HTML_CAPS);
604 } else if (xml_check_first_element (tf, "html", 4, FALSE)) {
605 gst_type_find_suggest (tf, GST_TYPE_FIND_MAXIMUM, HTML_CAPS);
606 } else if ((d = memchr (data, '<', 16))) {
607 data = (const gchar *) gst_type_find_peek (tf, d - data, 6);
608 if (data && g_ascii_strncasecmp (data, "<html>", 6) == 0) {
609 gst_type_find_suggest (tf, GST_TYPE_FIND_MAXIMUM, HTML_CAPS);
616 static GstStaticCaps mid_caps = GST_STATIC_CAPS ("audio/midi");
618 #define MID_CAPS gst_static_caps_get(&mid_caps)
620 mid_type_find (GstTypeFind * tf, gpointer unused)
622 const guint8 *data = gst_type_find_peek (tf, 0, 4);
624 /* http://jedi.ks.uiuc.edu/~johns/links/music/midifile.html */
625 if (data && data[0] == 'M' && data[1] == 'T' && data[2] == 'h'
627 gst_type_find_suggest (tf, GST_TYPE_FIND_MAXIMUM, MID_CAPS);
630 /*** audio/mobile-xmf ***/
632 static GstStaticCaps mxmf_caps = GST_STATIC_CAPS ("audio/mobile-xmf");
634 #define MXMF_CAPS gst_static_caps_get(&mxmf_caps)
636 mxmf_type_find (GstTypeFind * tf, gpointer unused)
638 const guint8 *data = NULL;
640 /* Search FileId "XMF_" 4 bytes */
641 data = gst_type_find_peek (tf, 0, 4);
642 if (data && data[0] == 'X' && data[1] == 'M' && data[2] == 'F'
644 /* Search Format version "2.00" 4 bytes */
645 data = gst_type_find_peek (tf, 4, 4);
646 if (data && data[0] == '2' && data[1] == '.' && data[2] == '0'
648 /* Search TypeId 2 1 byte */
649 data = gst_type_find_peek (tf, 11, 1);
650 if (data && data[0] == 2) {
651 gst_type_find_suggest (tf, GST_TYPE_FIND_MAXIMUM, MXMF_CAPS);
658 /*** video/x-fli ***/
660 static GstStaticCaps flx_caps = GST_STATIC_CAPS ("video/x-fli");
662 #define FLX_CAPS gst_static_caps_get(&flx_caps)
664 flx_type_find (GstTypeFind * tf, gpointer unused)
666 const guint8 *data = gst_type_find_peek (tf, 0, 134);
669 /* check magic and the frame type of the first frame */
670 if ((data[4] == 0x11 || data[4] == 0x12 ||
671 data[4] == 0x30 || data[4] == 0x44) &&
673 ((data[132] == 0x00 || data[132] == 0xfa) && data[133] == 0xf1)) {
674 gst_type_find_suggest (tf, GST_TYPE_FIND_MAXIMUM, FLX_CAPS);
678 data = gst_type_find_peek (tf, 0, 6);
680 /* check magic only */
681 if ((data[4] == 0x11 || data[4] == 0x12 ||
682 data[4] == 0x30 || data[4] == 0x44) && data[5] == 0xaf) {
683 gst_type_find_suggest (tf, GST_TYPE_FIND_LIKELY, FLX_CAPS);
689 /*** application/x-id3 ***/
691 static GstStaticCaps id3_caps = GST_STATIC_CAPS ("application/x-id3");
693 #define ID3_CAPS gst_static_caps_get(&id3_caps)
695 id3v2_type_find (GstTypeFind * tf, gpointer unused)
697 const guint8 *data = gst_type_find_peek (tf, 0, 10);
699 if (data && memcmp (data, "ID3", 3) == 0 &&
700 data[3] != 0xFF && data[4] != 0xFF &&
701 (data[6] & 0x80) == 0 && (data[7] & 0x80) == 0 &&
702 (data[8] & 0x80) == 0 && (data[9] & 0x80) == 0) {
703 gst_type_find_suggest (tf, GST_TYPE_FIND_MAXIMUM, ID3_CAPS);
708 id3v1_type_find (GstTypeFind * tf, gpointer unused)
710 const guint8 *data = gst_type_find_peek (tf, -128, 3);
712 if (data && memcmp (data, "TAG", 3) == 0) {
713 gst_type_find_suggest (tf, GST_TYPE_FIND_MAXIMUM, ID3_CAPS);
717 /*** application/x-ape ***/
719 static GstStaticCaps apetag_caps = GST_STATIC_CAPS ("application/x-apetag");
721 #define APETAG_CAPS gst_static_caps_get(&apetag_caps)
723 apetag_type_find (GstTypeFind * tf, gpointer unused)
727 /* APEv1/2 at start of file */
728 data = gst_type_find_peek (tf, 0, 8);
729 if (data && !memcmp (data, "APETAGEX", 8)) {
730 gst_type_find_suggest (tf, GST_TYPE_FIND_MAXIMUM, APETAG_CAPS);
734 /* APEv1/2 at end of file */
735 data = gst_type_find_peek (tf, -32, 8);
736 if (data && !memcmp (data, "APETAGEX", 8)) {
737 gst_type_find_suggest (tf, GST_TYPE_FIND_MAXIMUM, APETAG_CAPS);
742 /*** audio/x-ttafile ***/
744 static GstStaticCaps tta_caps = GST_STATIC_CAPS ("audio/x-ttafile");
746 #define TTA_CAPS gst_static_caps_get(&tta_caps)
748 tta_type_find (GstTypeFind * tf, gpointer unused)
750 const guint8 *data = gst_type_find_peek (tf, 0, 3);
753 if (memcmp (data, "TTA", 3) == 0) {
754 gst_type_find_suggest (tf, GST_TYPE_FIND_MAXIMUM, TTA_CAPS);
760 /*** audio/x-flac ***/
761 static GstStaticCaps flac_caps = GST_STATIC_CAPS ("audio/x-flac");
763 #define FLAC_CAPS (gst_static_caps_get(&flac_caps))
766 flac_type_find (GstTypeFind * tf, gpointer unused)
768 DataScanCtx c = { 0, NULL, 0 };
770 if (G_UNLIKELY (!data_scan_ctx_ensure_data (tf, &c, 4)))
773 /* standard flac (also old/broken flac-in-ogg with an initial 4-byte marker
774 * packet and without the usual packet framing) */
775 if (memcmp (c.data, "fLaC", 4) == 0) {
776 gst_type_find_suggest (tf, GST_TYPE_FIND_MAXIMUM, FLAC_CAPS);
780 if (G_UNLIKELY (!data_scan_ctx_ensure_data (tf, &c, 6)))
783 /* flac-in-ogg, see http://flac.sourceforge.net/ogg_mapping.html */
784 if (memcmp (c.data, "\177FLAC\001", 6) == 0) {
785 gst_type_find_suggest (tf, GST_TYPE_FIND_MAXIMUM, FLAC_CAPS);
789 /* disabled because it happily typefinds /dev/urandom as audio/x-flac, and
790 * because I yet have to see header-less flac in the wild */
792 /* flac without headers (subset format) */
793 /* 64K should be enough */
794 while (c.offset < (64 * 1024)) {
795 if (G_UNLIKELY (!data_scan_ctx_ensure_data (tf, &c, 4)))
798 /* look for frame header,
799 * http://flac.sourceforge.net/format.html#frame_header
801 if (c.data[0] == 0xff && (c.data[1] >> 2) == 0x3e) {
802 /* bit 15 in the header must be 0 */
803 if (((c.data[1] >> 1) & 0x01) == 0x01)
806 /* blocksize must be != 0x00 */
807 if ((c.data[2] >> 4) == 0x00)
810 /* samplerate must be != 0x0f */
811 if ((c.data[2] & 0x0f) == 0x0f)
813 /* also 0 is invalid, as it means get the info from the header and we
814 * don't have headers if we are here */
815 if ((c.data[2] & 0x0f) == 0x00)
818 /* channel assignment must be < 11 */
819 if ((c.data[3] >> 4) >= 11)
822 /* sample size must be != 0x07 and != 0x05 */
823 if (((c.data[3] >> 1) & 0x07) == 0x07)
825 if (((c.data[3] >> 1) & 0x07) == 0x05)
827 /* also 0 is invalid, as it means get the info from the header and we
828 * don't have headers if we are here */
829 if (((c.data[3] >> 1) & 0x07) == 0x00)
832 /* next bit must be 0 */
833 if ((c.data[3] & 0x01) == 0x01)
836 /* FIXME: shouldn't we include the crc check ? */
838 GST_DEBUG ("Found flac without headers at %d", (gint) c.offset);
839 gst_type_find_suggest (tf, GST_TYPE_FIND_POSSIBLE, FLAC_CAPS);
843 data_scan_ctx_advance (tf, &c, 1);
848 /*** audio/mpeg version 2, 4 ***/
850 static GstStaticCaps aac_caps = GST_STATIC_CAPS ("audio/mpeg, "
851 "mpegversion = (int) { 2, 4 }, framed = (bool) false");
852 #define AAC_CAPS (gst_static_caps_get(&aac_caps))
853 #define AAC_AMOUNT (4096)
855 aac_type_find (GstTypeFind * tf, gpointer unused)
857 /* LUT to convert the AudioObjectType from the ADTS header to a string */
858 DataScanCtx c = { 0, NULL, 0 };
860 while (c.offset < AAC_AMOUNT) {
863 /* detect adts header or adif header.
864 * The ADIF header is 4 bytes, that should be OK. The ADTS header, on
865 * the other hand, is 14 bits only, so we require one valid frame with
866 * again a valid syncpoint on the next one (28 bits) for certainty. We
867 * require 4 kB, which is quite a lot, since frames are generally 200-400
869 * LOAS has 2 possible syncwords, which are 11 bits and 16 bits long.
870 * The following stream syntax depends on which one is found.
872 if (G_UNLIKELY (!data_scan_ctx_ensure_data (tf, &c, 6)))
875 snc = GST_READ_UINT16_BE (c.data);
876 if (G_UNLIKELY ((snc & 0xfff6) == 0xfff0)) {
877 /* ADTS header - find frame length */
878 GST_DEBUG ("Found one ADTS syncpoint at offset 0x%" G_GINT64_MODIFIER
879 "x, tracing next...", c.offset);
880 len = ((c.data[3] & 0x03) << 11) |
881 (c.data[4] << 3) | ((c.data[5] & 0xe0) >> 5);
883 if (len == 0 || !data_scan_ctx_ensure_data (tf, &c, len + 2)) {
884 GST_DEBUG ("Wrong sync or next frame not within reach, len=%u", len);
888 /* check if there's a second ADTS frame */
889 snc = GST_READ_UINT16_BE (c.data + len);
890 if ((snc & 0xfff6) == 0xfff0) {
892 guint mpegversion, sample_freq_idx, channel_config, profile_idx, rate;
893 guint8 audio_config[2];
895 mpegversion = (c.data[1] & 0x08) ? 2 : 4;
896 profile_idx = c.data[2] >> 6;
897 sample_freq_idx = ((c.data[2] & 0x3c) >> 2);
898 channel_config = ((c.data[2] & 0x01) << 2) + (c.data[3] >> 6);
900 GST_DEBUG ("Found second ADTS-%d syncpoint at offset 0x%"
901 G_GINT64_MODIFIER "x, framelen %u", mpegversion, c.offset, len);
903 /* 0xd and 0xe are reserved. 0xf means the sample frequency is directly
904 * specified in the header, but that's not allowed for ADTS */
905 if (sample_freq_idx > 0xc) {
906 GST_DEBUG ("Unexpected sample frequency index %d or wrong sync",
911 rate = gst_codec_utils_aac_get_sample_rate_from_index (sample_freq_idx);
912 GST_LOG ("ADTS: profile=%u, rate=%u", profile_idx, rate);
914 /* The ADTS frame header is slightly different from the
915 * AudioSpecificConfig defined for the MPEG-4 container, so we just
916 * construct enough of it for getting the level here. */
917 /* ADTS counts profiles from 0 instead of 1 to save bits */
918 audio_config[0] = (profile_idx + 1) << 3;
919 audio_config[0] |= (sample_freq_idx >> 1) & 0x7;
920 audio_config[1] = (sample_freq_idx & 0x1) << 7;
921 audio_config[1] |= (channel_config & 0xf) << 3;
923 caps = gst_caps_new_simple ("audio/mpeg",
924 "framed", G_TYPE_BOOLEAN, FALSE,
925 "mpegversion", G_TYPE_INT, mpegversion,
926 "stream-format", G_TYPE_STRING, "adts", NULL);
928 gst_codec_utils_aac_caps_set_level_and_profile (caps, audio_config, 2);
930 /* add rate and number of channels if we can */
931 if (channel_config != 0 && channel_config <= 7) {
932 const guint channels_map[] = { 0, 1, 2, 3, 4, 5, 6, 8 };
934 gst_caps_set_simple (caps, "channels", G_TYPE_INT,
935 channels_map[channel_config], "rate", G_TYPE_INT, rate, NULL);
938 gst_type_find_suggest (tf, GST_TYPE_FIND_LIKELY, caps);
939 gst_caps_unref (caps);
943 GST_DEBUG ("No next frame found... (should have been at 0x%x)", len);
944 } else if (G_UNLIKELY (((snc & 0xffe0) == 0x56e0) || (snc == 0x4de1))) {
947 GST_DEBUG ("Found one LOAS syncword at offset 0x%" G_GINT64_MODIFIER
948 "x, tracing next...", c.offset);
950 /* check length of frame for each type of detectable LOAS streams */
952 /* EPAudioSyncStream */
953 len = ((c.data[2] & 0x0f) << 9) | (c.data[3] << 1) |
954 ((c.data[4] & 0x80) >> 7);
955 /* add size of EP sync stream header */
958 /* AudioSyncStream */
959 len = ((c.data[1] & 0x1f) << 8) | c.data[2];
960 /* add size of sync stream header */
964 if (len == 0 || !data_scan_ctx_ensure_data (tf, &c, len + 2)) {
965 GST_DEBUG ("Wrong sync or next frame not within reach, len=%u", len);
969 /* check if there's a second LOAS frame */
970 snc = GST_READ_UINT16_BE (c.data + len);
971 if (((snc & 0xffe0) == 0x56e0) || (snc == 0x4de1)) {
972 GST_DEBUG ("Found second LOAS syncword at offset 0x%"
973 G_GINT64_MODIFIER "x, framelen %u", c.offset, len);
975 gst_type_find_suggest_simple (tf, GST_TYPE_FIND_LIKELY, "audio/mpeg",
976 "framed", G_TYPE_BOOLEAN, FALSE,
977 "mpegversion", G_TYPE_INT, 4,
978 "stream-format", G_TYPE_STRING, "loas", NULL);
982 GST_DEBUG ("No next frame found... (should have been at 0x%x)", len);
983 } else if (!memcmp (c.data, "ADIF", 4)) {
985 gst_type_find_suggest_simple (tf, GST_TYPE_FIND_LIKELY, "audio/mpeg",
986 "framed", G_TYPE_BOOLEAN, FALSE, "mpegversion", G_TYPE_INT, 4,
987 "stream-format", G_TYPE_STRING, "adif", NULL);
993 data_scan_ctx_advance (tf, &c, 1);
997 /*** audio/mpeg version 1 ***/
1000 * The chance that random data is identified as a valid mp3 header is 63 / 2^18
1001 * (0.024%) per try. This makes the function for calculating false positives
1002 * 1 - (1 - ((63 / 2 ^18) ^ GST_MP3_TYPEFIND_MIN_HEADERS)) ^ buffersize)
1003 * This has the following probabilities of false positives:
1004 * datasize MIN_HEADERS
1006 * 4096 62.6% 0.02% 0% 0%
1007 * 16384 98% 0.09% 0% 0%
1008 * 1 MiB 100% 5.88% 0% 0%
1009 * 1 GiB 100% 100% 1.44% 0%
1010 * 1 TiB 100% 100% 100% 0.35%
1011 * This means that the current choice (3 headers by most of the time 4096 byte
1012 * buffers is pretty safe for now.
1014 * The max. size of each frame is 1440 bytes, which means that for N frames to
1015 * be detected, we need 1440 * GST_MP3_TYPEFIND_MIN_HEADERS + 3 bytes of data.
1016 * Assuming we step into the stream right after the frame header, this
1017 * means we need 1440 * (GST_MP3_TYPEFIND_MIN_HEADERS + 1) - 1 + 3 bytes
1018 * of data (5762) to always detect any mp3.
1021 static const guint mp3types_bitrates[2][3][16] =
1022 { {{0, 32, 64, 96, 128, 160, 192, 224, 256, 288, 320, 352, 384, 416, 448,},
1023 {0, 32, 48, 56, 64, 80, 96, 112, 128, 160, 192, 224, 256, 320, 384,},
1024 {0, 32, 40, 48, 56, 64, 80, 96, 112, 128, 160, 192, 224, 256, 320,}},
1025 {{0, 32, 48, 56, 64, 80, 96, 112, 128, 144, 160, 176, 192, 224, 256,},
1026 {0, 8, 16, 24, 32, 40, 48, 56, 64, 80, 96, 112, 128, 144, 160,},
1027 {0, 8, 16, 24, 32, 40, 48, 56, 64, 80, 96, 112, 128, 144, 160,}},
1030 static const guint mp3types_freqs[3][3] = { {11025, 12000, 8000},
1031 {22050, 24000, 16000},
1032 {44100, 48000, 32000}
1036 mp3_type_frame_length_from_header (guint32 header, guint * put_layer,
1037 guint * put_channels, guint * put_bitrate, guint * put_samplerate,
1038 gboolean * may_be_free_format, gint possible_free_framelen)
1040 guint bitrate, layer, length, mode, samplerate, version, channels;
1042 if ((header & 0xffe00000) != 0xffe00000)
1045 /* we don't need extension, copyright, original or
1046 * emphasis for the frame length */
1050 mode = header & 0x3;
1054 length = header & 0x1;
1057 /* sampling frequency */
1058 samplerate = header & 0x3;
1059 if (samplerate == 3)
1064 bitrate = header & 0xF;
1065 if (bitrate == 0 && possible_free_framelen == -1) {
1066 GST_LOG ("Possibly a free format mp3 - signaling");
1067 *may_be_free_format = TRUE;
1069 if (bitrate == 15 || (bitrate == 0 && possible_free_framelen == -1))
1072 /* ignore error correction, too */
1076 layer = 4 - (header & 0x3);
1081 /* version 0=MPEG2.5; 2=MPEG2; 3=MPEG1 */
1082 version = header & 0x3;
1087 channels = (mode == 3) ? 1 : 2;
1088 samplerate = mp3types_freqs[version > 0 ? version - 1 : 0][samplerate];
1092 length += possible_free_framelen;
1093 bitrate = length * samplerate / 48000;
1095 length += possible_free_framelen;
1096 bitrate = length * samplerate /
1097 ((layer == 3 && version != 3) ? 72000 : 144000);
1101 bitrate = mp3types_bitrates[version == 3 ? 0 : 1][layer - 1][bitrate];
1103 length = ((12000 * bitrate / samplerate) + length) * 4;
1105 length += ((layer == 3
1106 && version != 3) ? 72000 : 144000) * bitrate / samplerate;
1110 GST_LOG ("mp3typefind: calculated mp3 frame length of %u bytes", length);
1112 ("mp3typefind: samplerate = %u - bitrate = %u - layer = %u - version = %u"
1113 " - channels = %u", samplerate, bitrate, layer, version, channels);
1118 *put_channels = channels;
1120 *put_bitrate = bitrate;
1122 *put_samplerate = samplerate;
1128 static GstStaticCaps mp3_caps = GST_STATIC_CAPS ("audio/mpeg, "
1129 "mpegversion = (int) 1, layer = (int) [ 1, 3 ]");
1130 #define MP3_CAPS (gst_static_caps_get(&mp3_caps))
1132 * random values for typefinding
1133 * if no more data is available, we will return a probability of
1134 * (found_headers/TRY_HEADERS) * (MAXIMUM * (TRY_SYNC - bytes_skipped)
1136 * if found_headers >= MIN_HEADERS
1138 #define GST_MP3_TYPEFIND_MIN_HEADERS (2)
1139 #define GST_MP3_TYPEFIND_TRY_HEADERS (5)
1140 #define GST_MP3_TYPEFIND_TRY_SYNC (GST_TYPE_FIND_MAXIMUM * 100) /* 10kB */
1141 #define GST_MP3_TYPEFIND_SYNC_SIZE (2048)
1142 #define GST_MP3_WRONG_HEADER (10)
1145 mp3_type_find_at_offset (GstTypeFind * tf, guint64 start_off,
1146 guint * found_layer, GstTypeFindProbability * found_prob)
1148 const guint8 *data = NULL;
1149 const guint8 *data_end = NULL;
1152 gint last_free_offset = -1;
1153 gint last_free_framelen = -1;
1154 gboolean headerstart = TRUE;
1161 while (skipped < GST_MP3_TYPEFIND_TRY_SYNC) {
1163 size = GST_MP3_TYPEFIND_SYNC_SIZE * 2;
1166 data = gst_type_find_peek (tf, skipped + start_off, size);
1167 } while (size > 10 && !data);
1170 data_end = data + size;
1172 if (*data == 0xFF) {
1173 const guint8 *head_data = NULL;
1174 guint layer = 0, bitrate, samplerate, channels;
1175 guint found = 0; /* number of valid headers found */
1176 guint64 offset = skipped;
1177 gboolean changed = FALSE;
1179 while (found < GST_MP3_TYPEFIND_TRY_HEADERS) {
1182 guint prev_layer = 0;
1183 guint prev_channels = 0, prev_samplerate = 0;
1184 gboolean free = FALSE;
1186 if ((gint64) (offset - skipped + 4) >= 0 &&
1187 data + offset - skipped + 4 < data_end) {
1188 head_data = data + offset - skipped;
1190 head_data = gst_type_find_peek (tf, offset + start_off, 4);
1194 head = GST_READ_UINT32_BE (head_data);
1195 if (!(length = mp3_type_frame_length_from_header (head, &layer,
1196 &channels, &bitrate, &samplerate, &free,
1197 last_free_framelen))) {
1199 if (last_free_offset == -1)
1200 last_free_offset = offset;
1202 last_free_framelen = offset - last_free_offset;
1203 offset = last_free_offset;
1207 last_free_framelen = -1;
1210 /* Mark the fact that we didn't find a valid header at the beginning */
1212 headerstart = FALSE;
1214 GST_LOG ("%d. header at offset %" G_GUINT64_FORMAT
1215 " (0x%" G_GINT64_MODIFIER "x) was not an mp3 header "
1216 "(possibly-free: %s)", found + 1, start_off + offset,
1217 start_off + offset, free ? "yes" : "no");
1220 if ((prev_layer && prev_layer != layer) ||
1221 /* (prev_bitrate && prev_bitrate != bitrate) || <-- VBR */
1222 (prev_samplerate && prev_samplerate != samplerate) ||
1223 (prev_channels && prev_channels != channels)) {
1224 /* this means an invalid property, or a change, which might mean
1225 * that this is not a mp3 but just a random bytestream. It could
1226 * be a freaking funky encoded mp3 though. We'll just not count
1231 prev_channels = channels;
1232 prev_samplerate = samplerate;
1235 GST_LOG ("found %d. header at offset %" G_GUINT64_FORMAT " (0x%"
1236 G_GINT64_MODIFIER "X)", found, start_off + offset,
1237 start_off + offset);
1241 g_assert (found <= GST_MP3_TYPEFIND_TRY_HEADERS);
1242 if (head_data == NULL &&
1243 gst_type_find_peek (tf, offset + start_off - 1, 1) == NULL)
1244 /* Incomplete last frame - don't count it. */
1246 if (found == GST_MP3_TYPEFIND_TRY_HEADERS ||
1247 (found >= GST_MP3_TYPEFIND_MIN_HEADERS && head_data == NULL)) {
1248 /* we can make a valid guess */
1249 guint probability = found * GST_TYPE_FIND_MAXIMUM *
1250 (GST_MP3_TYPEFIND_TRY_SYNC - skipped) /
1251 GST_MP3_TYPEFIND_TRY_HEADERS / GST_MP3_TYPEFIND_TRY_SYNC;
1254 && probability > (GST_TYPE_FIND_MINIMUM + GST_MP3_WRONG_HEADER))
1255 probability -= GST_MP3_WRONG_HEADER;
1256 if (probability < GST_TYPE_FIND_MINIMUM)
1257 probability = GST_TYPE_FIND_MINIMUM;
1261 probability = (probability + GST_TYPE_FIND_MAXIMUM) / 2;
1264 ("audio/mpeg calculated %u = %u * %u / %u * (%u - %"
1265 G_GUINT64_FORMAT ") / %u", probability, GST_TYPE_FIND_MAXIMUM,
1266 found, GST_MP3_TYPEFIND_TRY_HEADERS, GST_MP3_TYPEFIND_TRY_SYNC,
1267 (guint64) skipped, GST_MP3_TYPEFIND_TRY_SYNC);
1268 /* make sure we're not id3 tagged */
1269 head_data = gst_type_find_peek (tf, -128, 3);
1270 if (head_data && (memcmp (head_data, "TAG", 3) == 0)) {
1273 g_assert (probability <= GST_TYPE_FIND_MAXIMUM);
1275 *found_prob = probability;
1276 if (probability > 0)
1277 *found_layer = layer;
1288 mp3_type_find (GstTypeFind * tf, gpointer unused)
1290 GstTypeFindProbability prob, mid_prob;
1292 guint layer, mid_layer;
1295 mp3_type_find_at_offset (tf, 0, &layer, &prob);
1296 length = gst_type_find_get_length (tf);
1298 if (length == 0 || length == (guint64) - 1) {
1304 /* if we're pretty certain already, skip the additional check */
1305 if (prob >= GST_TYPE_FIND_LIKELY)
1308 mp3_type_find_at_offset (tf, length / 2, &mid_layer, &mid_prob);
1312 GST_LOG ("detected audio/mpeg only in the middle (p=%u)", mid_prob);
1318 if (layer != mid_layer) {
1319 GST_WARNING ("audio/mpeg layer discrepancy: %u vs. %u", layer, mid_layer);
1320 return; /* FIXME: or should we just go with the one in the middle? */
1323 /* detected mpeg audio both in middle of the file and at the start */
1324 prob = (prob + mid_prob) / 2;
1328 /* let's see if there's a valid header right at the start */
1329 data = gst_type_find_peek (tf, 0, 4); /* use min. frame size? */
1330 if (data && mp3_type_frame_length_from_header (GST_READ_UINT32_BE (data),
1331 &layer, NULL, NULL, NULL, NULL, 0) != 0) {
1333 prob = GST_TYPE_FIND_POSSIBLE - 10;
1335 prob = MAX (GST_TYPE_FIND_POSSIBLE - 10, prob + 10);
1345 g_return_if_fail (layer >= 1 && layer <= 3);
1347 gst_type_find_suggest_simple (tf, prob, "audio/mpeg",
1348 "mpegversion", G_TYPE_INT, 1, "layer", G_TYPE_INT, layer, NULL);
1352 /*** audio/x-musepack ***/
1354 static GstStaticCaps musepack_caps =
1355 GST_STATIC_CAPS ("audio/x-musepack, streamversion= (int) { 7, 8 }");
1357 #define MUSEPACK_CAPS (gst_static_caps_get(&musepack_caps))
1359 musepack_type_find (GstTypeFind * tf, gpointer unused)
1361 const guint8 *data = gst_type_find_peek (tf, 0, 4);
1362 GstTypeFindProbability prop = GST_TYPE_FIND_MINIMUM;
1363 gint streamversion = -1;
1365 if (data && memcmp (data, "MP+", 3) == 0) {
1367 if ((data[3] & 0x7f) == 7) {
1368 prop = GST_TYPE_FIND_MAXIMUM;
1370 prop = GST_TYPE_FIND_LIKELY + 10;
1372 } else if (data && memcmp (data, "MPCK", 4) == 0) {
1374 prop = GST_TYPE_FIND_MAXIMUM;
1377 if (streamversion != -1) {
1378 gst_type_find_suggest_simple (tf, prop, "audio/x-musepack",
1379 "streamversion", G_TYPE_INT, streamversion, NULL);
1383 /*** audio/x-ac3 ***/
1384 /* FIXME 0.11: should be audio/ac3, but isn't for backwards compatibility */
1385 static GstStaticCaps ac3_caps = GST_STATIC_CAPS ("audio/x-ac3");
1387 #define AC3_CAPS (gst_static_caps_get(&ac3_caps))
1389 static GstStaticCaps eac3_caps = GST_STATIC_CAPS ("audio/x-eac3");
1391 #define EAC3_CAPS (gst_static_caps_get(&eac3_caps))
1395 unsigned short bit_rate;
1396 unsigned short frm_size[3];
1399 static const struct ac3_frmsize ac3_frmsizecod_tbl[] = {
1402 {40, {80, 87, 120}},
1403 {40, {80, 88, 120}},
1404 {48, {96, 104, 144}},
1405 {48, {96, 105, 144}},
1406 {56, {112, 121, 168}},
1407 {56, {112, 122, 168}},
1408 {64, {128, 139, 192}},
1409 {64, {128, 140, 192}},
1410 {80, {160, 174, 240}},
1411 {80, {160, 175, 240}},
1412 {96, {192, 208, 288}},
1413 {96, {192, 209, 288}},
1414 {112, {224, 243, 336}},
1415 {112, {224, 244, 336}},
1416 {128, {256, 278, 384}},
1417 {128, {256, 279, 384}},
1418 {160, {320, 348, 480}},
1419 {160, {320, 349, 480}},
1420 {192, {384, 417, 576}},
1421 {192, {384, 418, 576}},
1422 {224, {448, 487, 672}},
1423 {224, {448, 488, 672}},
1424 {256, {512, 557, 768}},
1425 {256, {512, 558, 768}},
1426 {320, {640, 696, 960}},
1427 {320, {640, 697, 960}},
1428 {384, {768, 835, 1152}},
1429 {384, {768, 836, 1152}},
1430 {448, {896, 975, 1344}},
1431 {448, {896, 976, 1344}},
1432 {512, {1024, 1114, 1536}},
1433 {512, {1024, 1115, 1536}},
1434 {576, {1152, 1253, 1728}},
1435 {576, {1152, 1254, 1728}},
1436 {640, {1280, 1393, 1920}},
1437 {640, {1280, 1394, 1920}}
1441 ac3_type_find (GstTypeFind * tf, gpointer unused)
1443 DataScanCtx c = { 0, NULL, 0 };
1445 /* Search for an ac3 frame; not necessarily right at the start, but give it
1446 * a lower probability if not found right at the start. Check that the
1447 * frame is followed by a second frame at the expected offset.
1448 * We could also check the two ac3 CRCs, but we don't do that right now */
1449 while (c.offset < 1024) {
1450 if (G_UNLIKELY (!data_scan_ctx_ensure_data (tf, &c, 5)))
1453 if (c.data[0] == 0x0b && c.data[1] == 0x77) {
1454 guint bsid = c.data[5] >> 3;
1458 guint fscod = c.data[4] >> 6;
1459 guint frmsizecod = c.data[4] & 0x3f;
1461 if (fscod < 3 && frmsizecod < 38) {
1462 DataScanCtx c_next = c;
1465 frame_size = ac3_frmsizecod_tbl[frmsizecod].frm_size[fscod];
1466 GST_LOG ("possible AC3 frame sync at offset %"
1467 G_GUINT64_FORMAT ", size=%u", c.offset, frame_size);
1468 if (data_scan_ctx_ensure_data (tf, &c_next, (frame_size * 2) + 5)) {
1469 data_scan_ctx_advance (tf, &c_next, frame_size * 2);
1471 if (c_next.data[0] == 0x0b && c_next.data[1] == 0x77) {
1472 fscod = c_next.data[4] >> 6;
1473 frmsizecod = c_next.data[4] & 0x3f;
1475 if (fscod < 3 && frmsizecod < 38) {
1476 GstTypeFindProbability prob;
1478 GST_LOG ("found second AC3 frame (size=%u), looks good",
1479 ac3_frmsizecod_tbl[frmsizecod].frm_size[fscod]);
1481 prob = GST_TYPE_FIND_MAXIMUM;
1483 prob = GST_TYPE_FIND_NEARLY_CERTAIN;
1485 gst_type_find_suggest (tf, prob, AC3_CAPS);
1489 GST_LOG ("no second AC3 frame found, false sync");
1493 } else if (bsid <= 16 && bsid > 10) {
1495 DataScanCtx c_next = c;
1498 frame_size = (((c.data[2] & 0x07) << 8) + c.data[3]) + 1;
1499 GST_LOG ("possible E-AC3 frame sync at offset %"
1500 G_GUINT64_FORMAT ", size=%u", c.offset, frame_size);
1501 if (data_scan_ctx_ensure_data (tf, &c_next, (frame_size * 2) + 5)) {
1502 data_scan_ctx_advance (tf, &c_next, frame_size * 2);
1504 if (c_next.data[0] == 0x0b && c_next.data[1] == 0x77) {
1505 GstTypeFindProbability prob;
1507 GST_LOG ("found second E-AC3 frame, looks good");
1509 prob = GST_TYPE_FIND_MAXIMUM;
1511 prob = GST_TYPE_FIND_NEARLY_CERTAIN;
1513 gst_type_find_suggest (tf, prob, EAC3_CAPS);
1516 GST_LOG ("no second E-AC3 frame found, false sync");
1520 GST_LOG ("invalid AC3 BSID: %u", bsid);
1523 data_scan_ctx_advance (tf, &c, 1);
1527 /*** audio/x-dts ***/
1528 static GstStaticCaps dts_caps = GST_STATIC_CAPS ("audio/x-dts");
1529 #define DTS_CAPS (gst_static_caps_get (&dts_caps))
1530 #define DTS_MIN_FRAMESIZE 96
1531 #define DTS_MAX_FRAMESIZE 18725 /* 16384*16/14 */
1534 dts_parse_frame_header (DataScanCtx * c, guint * frame_size,
1535 guint * sample_rate, guint * channels, guint * depth, guint * endianness)
1537 static const int sample_rates[16] = { 0, 8000, 16000, 32000, 0, 0, 11025,
1538 22050, 44100, 0, 0, 12000, 24000, 48000, 96000, 192000
1540 static const guint8 channels_table[16] = { 1, 2, 2, 2, 2, 3, 3, 4, 4, 5,
1545 guint num_blocks, chans, lfe, i;
1547 marker = GST_READ_UINT32_BE (c->data);
1549 /* raw big endian or 14-bit big endian */
1550 if (marker == 0x7FFE8001 || marker == 0x1FFFE800) {
1551 *endianness = G_BIG_ENDIAN;
1552 for (i = 0; i < G_N_ELEMENTS (hdr); ++i)
1553 hdr[i] = GST_READ_UINT16_BE (c->data + (i * sizeof (guint16)));
1555 /* raw little endian or 14-bit little endian */
1556 if (marker == 0xFE7F0180 || marker == 0xFF1F00E8) {
1557 *endianness = G_LITTLE_ENDIAN;
1558 for (i = 0; i < G_N_ELEMENTS (hdr); ++i)
1559 hdr[i] = GST_READ_UINT16_LE (c->data + (i * sizeof (guint16)));
1564 GST_LOG ("dts sync marker 0x%08x at offset %u", marker, (guint) c->offset);
1567 if (marker == 0x1FFFE800 || marker == 0xFF1F00E8) {
1568 if ((hdr[2] & 0xFFF0) != 0x07F0)
1570 /* discard top 2 bits (2 void), shift in 2 */
1571 hdr[0] = (hdr[0] << 2) | ((hdr[1] >> 12) & 0x0003);
1572 /* discard top 4 bits (2 void, 2 shifted into hdr[0]), shift in 4 etc. */
1573 hdr[1] = (hdr[1] << 4) | ((hdr[2] >> 10) & 0x000F);
1574 hdr[2] = (hdr[2] << 6) | ((hdr[3] >> 8) & 0x003F);
1575 hdr[3] = (hdr[3] << 8) | ((hdr[4] >> 6) & 0x00FF);
1576 hdr[4] = (hdr[4] << 10) | ((hdr[5] >> 4) & 0x03FF);
1577 hdr[5] = (hdr[5] << 12) | ((hdr[6] >> 2) & 0x0FFF);
1578 hdr[6] = (hdr[6] << 14) | ((hdr[7] >> 0) & 0x3FFF);
1579 g_assert (hdr[0] == 0x7FFE && hdr[1] == 0x8001);
1585 GST_LOG ("frame header: %04x%04x%04x%04x", hdr[2], hdr[3], hdr[4], hdr[5]);
1587 num_blocks = (hdr[2] >> 2) & 0x7F;
1588 *frame_size = (((hdr[2] & 0x03) << 12) | (hdr[3] >> 4)) + 1;
1589 chans = ((hdr[3] & 0x0F) << 2) | (hdr[4] >> 14);
1590 *sample_rate = sample_rates[(hdr[4] >> 10) & 0x0F];
1591 lfe = (hdr[5] >> 9) & 0x03;
1593 if (num_blocks < 5 || *frame_size < 96 || *sample_rate == 0)
1596 if (marker == 0x1FFFE800 || marker == 0xFF1F00E8)
1597 *frame_size = (*frame_size * 16) / 14; /* FIXME: round up? */
1599 if (chans < G_N_ELEMENTS (channels_table))
1600 *channels = channels_table[chans] + ((lfe) ? 1 : 0);
1608 dts_type_find (GstTypeFind * tf, gpointer unused)
1610 DataScanCtx c = { 0, NULL, 0 };
1612 /* Search for an dts frame; not necessarily right at the start, but give it
1613 * a lower probability if not found right at the start. Check that the
1614 * frame is followed by a second frame at the expected offset. */
1615 while (c.offset <= DTS_MAX_FRAMESIZE) {
1616 guint frame_size = 0, rate = 0, chans = 0, depth = 0, endianness = 0;
1618 if (G_UNLIKELY (!data_scan_ctx_ensure_data (tf, &c, DTS_MIN_FRAMESIZE)))
1621 if (G_UNLIKELY (dts_parse_frame_header (&c, &frame_size, &rate, &chans,
1622 &depth, &endianness))) {
1623 GstTypeFindProbability prob;
1626 prob = (c.offset == 0) ? GST_TYPE_FIND_LIKELY : GST_TYPE_FIND_POSSIBLE;
1628 /* check for second frame sync */
1630 data_scan_ctx_advance (tf, &next_c, frame_size);
1631 if (data_scan_ctx_ensure_data (tf, &next_c, 4)) {
1632 GST_LOG ("frame size: %u 0x%04x", frame_size, frame_size);
1633 GST_MEMDUMP ("second frame sync", next_c.data, 4);
1634 if (GST_READ_UINT32_BE (c.data) == GST_READ_UINT32_BE (next_c.data))
1635 prob = GST_TYPE_FIND_MAXIMUM;
1639 gst_type_find_suggest_simple (tf, prob, "audio/x-dts",
1640 "rate", G_TYPE_INT, rate, "channels", G_TYPE_INT, chans,
1641 "depth", G_TYPE_INT, depth, "endianness", G_TYPE_INT, endianness,
1642 "framed", G_TYPE_BOOLEAN, FALSE, NULL);
1644 gst_type_find_suggest_simple (tf, prob, "audio/x-dts",
1645 "rate", G_TYPE_INT, rate, "depth", G_TYPE_INT, depth,
1646 "endianness", G_TYPE_INT, endianness,
1647 "framed", G_TYPE_BOOLEAN, FALSE, NULL);
1653 data_scan_ctx_advance (tf, &c, 1);
1659 /* can only be detected by using the extension, in which case we use the default
1661 static GstStaticCaps gsm_caps =
1662 GST_STATIC_CAPS ("audio/x-gsm, rate=8000, channels=1");
1664 #define GSM_CAPS (gst_static_caps_get(&gsm_caps))
1668 static GstStaticCaps wavpack_caps =
1669 GST_STATIC_CAPS ("audio/x-wavpack, framed = (boolean) false");
1671 #define WAVPACK_CAPS (gst_static_caps_get(&wavpack_caps))
1673 static GstStaticCaps wavpack_correction_caps =
1674 GST_STATIC_CAPS ("audio/x-wavpack-correction, framed = (boolean) false");
1676 #define WAVPACK_CORRECTION_CAPS (gst_static_caps_get(&wavpack_correction_caps))
1679 wavpack_type_find (GstTypeFind * tf, gpointer unused)
1685 data = gst_type_find_peek (tf, 0, 32);
1689 if (data[0] != 'w' || data[1] != 'v' || data[2] != 'p' || data[3] != 'k')
1692 /* Note: wavpack blocks can be fairly large (easily 60-110k), possibly
1693 * larger than the max. limits imposed by certain typefinding elements
1694 * like id3demux or apedemux, so typefinding is most likely only going to
1695 * work in pull-mode */
1696 blocksize = GST_READ_UINT32_LE (data + 4);
1697 GST_LOG ("wavpack header, blocksize=0x%04x", blocksize);
1699 while (offset < 32 + blocksize) {
1702 /* get chunk header */
1703 GST_LOG ("peeking at chunk at offset 0x%04x", (guint) offset);
1704 data = gst_type_find_peek (tf, offset, 4);
1707 sublen = ((guint32) data[1]) << 1;
1708 if (data[0] & 0x80) {
1709 sublen |= (((guint32) data[2]) << 9) | (((guint32) data[3]) << 17);
1710 sublen += 1 + 3; /* id + length */
1712 sublen += 1 + 1; /* id + length */
1714 if (sublen > blocksize - offset + 32) {
1715 GST_LOG ("chunk length too big (%u > %" G_GUINT64_FORMAT ")", sublen,
1716 blocksize - offset);
1719 if ((data[0] & 0x20) == 0) {
1720 switch (data[0] & 0x0f) {
1721 case 0xa: /* ID_WV_BITSTREAM */
1722 case 0xc: /* ID_WVX_BITSTREAM */
1723 gst_type_find_suggest (tf, GST_TYPE_FIND_LIKELY, WAVPACK_CAPS);
1725 case 0xb: /* ID_WVC_BITSTREAM */
1726 gst_type_find_suggest (tf, GST_TYPE_FIND_LIKELY,
1727 WAVPACK_CORRECTION_CAPS);
1737 /*** application/postscrip ***/
1738 static GstStaticCaps postscript_caps =
1739 GST_STATIC_CAPS ("application/postscript");
1741 #define POSTSCRIPT_CAPS (gst_static_caps_get(&postscript_caps))
1744 postscript_type_find (GstTypeFind * tf, gpointer unused)
1746 const guint8 *data = gst_type_find_peek (tf, 0, 3);
1750 if (data[0] == 0x04)
1752 if (data[0] == '%' && data[1] == '!')
1753 gst_type_find_suggest (tf, GST_TYPE_FIND_POSSIBLE, POSTSCRIPT_CAPS);
1757 /*** image/svg+xml ***/
1758 static GstStaticCaps svg_caps = GST_STATIC_CAPS ("image/svg+xml");
1760 #define SVG_CAPS (gst_static_caps_get(&svg_caps))
1763 svg_type_find (GstTypeFind * tf, gpointer unused)
1765 static const gchar svg_doctype[] = "!DOCTYPE svg";
1766 static const gchar svg_tag[] = "<svg";
1767 DataScanCtx c = { 0, NULL, 0 };
1769 while (c.offset <= 1024) {
1770 if (G_UNLIKELY (!data_scan_ctx_ensure_data (tf, &c, 12)))
1773 if (memcmp (svg_doctype, c.data, 12) == 0) {
1774 gst_type_find_suggest (tf, GST_TYPE_FIND_MAXIMUM, SVG_CAPS);
1776 } else if (memcmp (svg_tag, c.data, 4) == 0) {
1777 gst_type_find_suggest (tf, GST_TYPE_FIND_LIKELY, SVG_CAPS);
1780 data_scan_ctx_advance (tf, &c, 1);
1784 /*** multipart/x-mixed-replace mimestream ***/
1786 static GstStaticCaps multipart_caps =
1787 GST_STATIC_CAPS ("multipart/x-mixed-replace");
1788 #define MULTIPART_CAPS gst_static_caps_get(&multipart_caps)
1790 /* multipart/x-mixed replace is:
1791 * <maybe some whitespace>--<some ascii chars>[\r]\n
1792 * <more ascii chars>[\r]\nContent-type:<more ascii>[\r]\n */
1794 multipart_type_find (GstTypeFind * tf, gpointer unused)
1799 #define MULTIPART_MAX_BOUNDARY_OFFSET 16
1800 data = gst_type_find_peek (tf, 0, MULTIPART_MAX_BOUNDARY_OFFSET);
1805 x - data < MULTIPART_MAX_BOUNDARY_OFFSET - 2 && g_ascii_isspace (*x);
1807 if (x[0] != '-' || x[1] != '-')
1810 /* Could be okay, peek what should be enough for a complete header */
1811 #define MULTIPART_MAX_HEADER_SIZE 256
1812 data = gst_type_find_peek (tf, 0, MULTIPART_MAX_HEADER_SIZE);
1816 for (x = data; x - data < MULTIPART_MAX_HEADER_SIZE - 14; x++) {
1817 if (!isascii (*x)) {
1821 !g_ascii_strncasecmp ("content-type:", (gchar *) x + 1, 13)) {
1822 gst_type_find_suggest (tf, GST_TYPE_FIND_MAXIMUM, MULTIPART_CAPS);
1828 /*** video/mpeg systemstream ***/
1829 static GstStaticCaps mpeg_sys_caps = GST_STATIC_CAPS ("video/mpeg, "
1830 "systemstream = (boolean) true, mpegversion = (int) [ 1, 2 ]");
1832 #define MPEG_SYS_CAPS gst_static_caps_get(&mpeg_sys_caps)
1833 #define IS_MPEG_HEADER(data) (G_UNLIKELY((((guint8 *)(data))[0] == 0x00) && \
1834 (((guint8 *)(data))[1] == 0x00) && \
1835 (((guint8 *)(data))[2] == 0x01)))
1837 #define IS_MPEG_PACK_CODE(b) ((b) == 0xBA)
1838 #define IS_MPEG_SYS_CODE(b) ((b) == 0xBB)
1839 #define IS_MPEG_PACK_HEADER(data) (IS_MPEG_HEADER (data) && \
1840 IS_MPEG_PACK_CODE (((guint8 *)(data))[3]))
1842 #define IS_MPEG_PES_CODE(b) (((b) & 0xF0) == 0xE0 || ((b) & 0xF0) == 0xC0 || \
1844 #define IS_MPEG_PES_HEADER(data) (IS_MPEG_HEADER (data) && \
1845 IS_MPEG_PES_CODE (((guint8 *)(data))[3]))
1847 #define MPEG2_MAX_PROBE_LENGTH (128 * 1024) /* 128kB should be 64 packs of the
1848 * most common 2kB pack size. */
1850 #define MPEG2_MIN_SYS_HEADERS 2
1851 #define MPEG2_MAX_SYS_HEADERS 5
1854 mpeg_sys_is_valid_pack (GstTypeFind * tf, const guint8 * data, guint len,
1857 /* Check the pack header @ offset for validity, assuming that the 4 byte header
1858 * itself has already been checked. */
1864 /* Check marker bits */
1865 if ((data[4] & 0xC4) == 0x44) {
1870 if ((data[6] & 0x04) != 0x04 ||
1871 (data[8] & 0x04) != 0x04 ||
1872 (data[9] & 0x01) != 0x01 || (data[12] & 0x03) != 0x03)
1875 stuff_len = data[13] & 0x07;
1877 /* Check the following header bytes, if we can */
1878 if ((14 + stuff_len + 4) <= len) {
1879 if (!IS_MPEG_HEADER (data + 14 + stuff_len))
1883 *pack_size = 14 + stuff_len;
1885 } else if ((data[4] & 0xF1) == 0x21) {
1887 if ((data[6] & 0x01) != 0x01 ||
1888 (data[8] & 0x01) != 0x01 ||
1889 (data[9] & 0x80) != 0x80 || (data[11] & 0x01) != 0x01)
1892 /* Check the following header bytes, if we can */
1893 if ((12 + 4) <= len) {
1894 if (!IS_MPEG_HEADER (data + 12))
1906 mpeg_sys_is_valid_pes (GstTypeFind * tf, const guint8 * data, guint len,
1909 guint pes_packet_len;
1911 /* Check the PES header at the given position, assuming the header code itself
1912 * was already checked */
1916 /* For MPEG Program streams, unbounded PES is not allowed, so we must have a
1917 * valid length present */
1918 pes_packet_len = GST_READ_UINT16_BE (data + 4);
1919 if (pes_packet_len == 0)
1922 /* Check the following header, if we can */
1923 if (6 + pes_packet_len + 4 <= len) {
1924 if (!IS_MPEG_HEADER (data + 6 + pes_packet_len))
1929 *pack_size = 6 + pes_packet_len;
1934 mpeg_sys_is_valid_sys (GstTypeFind * tf, const guint8 * data, guint len,
1939 /* Check the System header at the given position, assuming the header code itself
1940 * was already checked */
1943 sys_hdr_len = GST_READ_UINT16_BE (data + 4);
1944 if (sys_hdr_len < 6)
1947 /* Check the following header, if we can */
1948 if (6 + sys_hdr_len + 4 <= len) {
1949 if (!IS_MPEG_HEADER (data + 6 + sys_hdr_len))
1954 *pack_size = 6 + sys_hdr_len;
1959 /* calculation of possibility to identify random data as mpeg systemstream:
1960 * bits that must match in header detection: 32 (or more)
1961 * chance that random data is identifed: 1/2^32
1962 * chance that MPEG2_MIN_PACK_HEADERS headers are identified:
1963 * 1/2^(32*MPEG2_MIN_PACK_HEADERS)
1964 * chance that this happens in MPEG2_MAX_PROBE_LENGTH bytes:
1965 * 1-(1+1/2^(32*MPEG2_MIN_PACK_HEADERS)^MPEG2_MAX_PROBE_LENGTH)
1966 * for current values:
1967 * 1-(1+1/2^(32*4)^101024)
1969 * Since we also check marker bits and pes packet lengths, this probability is a
1970 * very coarse upper bound.
1973 mpeg_sys_type_find (GstTypeFind * tf, gpointer unused)
1975 const guint8 *data, *data0, *first_sync, *end;
1976 gint mpegversion = 0;
1977 guint pack_headers = 0;
1978 guint pes_headers = 0;
1980 guint since_last_sync = 0;
1981 guint32 sync_word = 0xffffffff;
1986 len = MPEG2_MAX_PROBE_LENGTH;
1989 data = gst_type_find_peek (tf, 0, 5 + len);
1990 } while (data == NULL && len >= 32);
2002 while (data < end) {
2004 if (sync_word == 0x00000100) {
2005 /* Found potential sync word */
2006 if (first_sync == NULL)
2007 first_sync = data - 3;
2009 if (since_last_sync > 4) {
2010 /* If more than 4 bytes since the last sync word, reset our counters,
2011 * as we're only interested in counting contiguous packets */
2012 pes_headers = pack_headers = 0;
2016 if (IS_MPEG_PACK_CODE (data[0])) {
2017 if ((data[1] & 0xC0) == 0x40) {
2020 } else if ((data[1] & 0xF0) == 0x20) {
2023 if (mpegversion != 0 &&
2024 mpeg_sys_is_valid_pack (tf, data - 3, end - data + 3, &pack_size)) {
2027 } else if (IS_MPEG_PES_CODE (data[0])) {
2029 if (mpeg_sys_is_valid_pes (tf, data - 3, end - data + 3, &pack_size)) {
2031 if (mpegversion == 0)
2034 } else if (IS_MPEG_SYS_CODE (data[0])) {
2035 if (mpeg_sys_is_valid_sys (tf, data - 3, end - data + 3, &pack_size)) {
2040 /* If we found a packet with a known size, skip the bytes in it and loop
2041 * around to check the next packet. */
2042 if (pack_size != 0) {
2043 data += pack_size - 3;
2044 sync_word = 0xffffffff;
2045 since_last_sync = 0;
2050 sync_word |= data[0];
2054 /* If we have found MAX headers, and *some* were pes headers (pack headers
2055 * are optional in an mpeg system stream) then return our high-probability
2057 if (pes_headers > 0 && (pack_headers + pes_headers) > MPEG2_MAX_SYS_HEADERS)
2061 /* If we at least saw MIN headers, and *some* were pes headers (pack headers
2062 * are optional in an mpeg system stream) then return a lower-probability
2064 if (pes_headers > 0 && (pack_headers + pes_headers) > MPEG2_MIN_SYS_HEADERS)
2072 prob = GST_TYPE_FIND_POSSIBLE + (10 * (pack_headers + pes_headers));
2073 prob = MIN (prob, GST_TYPE_FIND_MAXIMUM);
2075 /* lower probability if the first packet wasn't right at the start */
2076 if (data0 != first_sync && prob >= 10)
2079 GST_LOG ("Suggesting MPEG %d system stream, %d packs, %d pes, prob %u%%\n",
2080 mpegversion, pack_headers, pes_headers, prob);
2082 gst_type_find_suggest_simple (tf, prob, "video/mpeg",
2083 "systemstream", G_TYPE_BOOLEAN, TRUE,
2084 "mpegversion", G_TYPE_INT, mpegversion, NULL);
2088 /*** video/mpegts Transport Stream ***/
2089 static GstStaticCaps mpegts_caps = GST_STATIC_CAPS ("video/mpegts, "
2090 "systemstream = (boolean) true, packetsize = (int) [ 188, 208 ]");
2091 #define MPEGTS_CAPS gst_static_caps_get(&mpegts_caps)
2093 #define GST_MPEGTS_TYPEFIND_MIN_HEADERS 4
2094 #define GST_MPEGTS_TYPEFIND_MAX_HEADERS 10
2095 #define GST_MPEGTS_MAX_PACKET_SIZE 208
2096 #define GST_MPEGTS_TYPEFIND_SYNC_SIZE \
2097 (GST_MPEGTS_TYPEFIND_MIN_HEADERS * GST_MPEGTS_MAX_PACKET_SIZE)
2098 #define GST_MPEGTS_TYPEFIND_MAX_SYNC \
2099 (GST_MPEGTS_TYPEFIND_MAX_HEADERS * GST_MPEGTS_MAX_PACKET_SIZE)
2100 #define GST_MPEGTS_TYPEFIND_SCAN_LENGTH \
2101 (GST_MPEGTS_TYPEFIND_MAX_SYNC * 4)
2103 #define MPEGTS_HDR_SIZE 4
2104 /* Check for sync byte, error_indicator == 0 and packet has payload */
2105 #define IS_MPEGTS_HEADER(data) (((data)[0] == 0x47) && \
2106 (((data)[1] & 0x80) == 0x00) && \
2107 (((data)[3] & 0x30) != 0x00))
2109 /* Helper function to search ahead at intervals of packet_size for mpegts
2112 mpeg_ts_probe_headers (GstTypeFind * tf, guint64 offset, gint packet_size)
2114 /* We always enter this function having found at least one header already */
2116 const guint8 *data = NULL;
2118 GST_LOG ("looking for mpeg-ts packets of size %u", packet_size);
2119 while (found < GST_MPEGTS_TYPEFIND_MAX_HEADERS) {
2120 offset += packet_size;
2122 data = gst_type_find_peek (tf, offset, MPEGTS_HDR_SIZE);
2123 if (data == NULL || !IS_MPEGTS_HEADER (data))
2127 GST_LOG ("mpeg-ts sync #%2d at offset %" G_GUINT64_FORMAT, found, offset);
2133 /* Try and detect at least 4 packets in at most 10 packets worth of
2134 * data. Need to try several possible packet sizes */
2136 mpeg_ts_type_find (GstTypeFind * tf, gpointer unused)
2138 /* TS packet sizes to test: normal, DVHS packet size and
2139 * FEC with 16 or 20 byte codes packet size. */
2140 const gint pack_sizes[] = { 188, 192, 204, 208 };
2141 const guint8 *data = NULL;
2143 guint64 skipped = 0;
2145 while (skipped < GST_MPEGTS_TYPEFIND_SCAN_LENGTH) {
2146 if (size < MPEGTS_HDR_SIZE) {
2147 data = gst_type_find_peek (tf, skipped, GST_MPEGTS_TYPEFIND_SYNC_SIZE);
2150 size = GST_MPEGTS_TYPEFIND_SYNC_SIZE;
2153 /* Have at least MPEGTS_HDR_SIZE bytes at this point */
2154 if (IS_MPEGTS_HEADER (data)) {
2157 GST_LOG ("possible mpeg-ts sync at offset %" G_GUINT64_FORMAT, skipped);
2159 for (p = 0; p < G_N_ELEMENTS (pack_sizes); p++) {
2162 /* Probe ahead at size pack_sizes[p] */
2163 found = mpeg_ts_probe_headers (tf, skipped, pack_sizes[p]);
2164 if (found >= GST_MPEGTS_TYPEFIND_MIN_HEADERS) {
2167 /* found at least 4 headers. 10 headers = MAXIMUM probability.
2168 * Arbitrarily, I assigned 10% probability for each header we
2169 * found, 40% -> 100% */
2170 probability = MIN (10 * found, GST_TYPE_FIND_MAXIMUM);
2172 gst_type_find_suggest_simple (tf, probability, "video/mpegts",
2173 "systemstream", G_TYPE_BOOLEAN, TRUE,
2174 "packetsize", G_TYPE_INT, pack_sizes[p], NULL);
2185 #define GST_MPEGVID_TYPEFIND_TRY_PICTURES 6
2186 #define GST_MPEGVID_TYPEFIND_TRY_SYNC (100 * 1024) /* 100 kB */
2188 /* Scan ahead a maximum of max_extra_offset bytes until the next IS_MPEG_HEADER
2189 * offset. After the call, offset will be after the 0x000001, i.e. at the 4th
2190 * byte of the MPEG header. Returns TRUE if a header was found, FALSE if not.
2193 mpeg_find_next_header (GstTypeFind * tf, DataScanCtx * c,
2194 guint64 max_extra_offset)
2196 guint64 extra_offset;
2198 for (extra_offset = 0; extra_offset <= max_extra_offset; ++extra_offset) {
2199 if (!data_scan_ctx_ensure_data (tf, c, 4))
2201 if (IS_MPEG_HEADER (c->data)) {
2202 data_scan_ctx_advance (tf, c, 3);
2205 data_scan_ctx_advance (tf, c, 1);
2210 /*** video/mpeg MPEG-4 elementary video stream ***/
2212 static GstStaticCaps mpeg4_video_caps = GST_STATIC_CAPS ("video/mpeg, "
2213 "systemstream=(boolean)false, mpegversion=4, parsed=(boolean)false");
2214 #define MPEG4_VIDEO_CAPS gst_static_caps_get(&mpeg4_video_caps)
2217 * This typefind is based on the elementary video header defined in
2218 * http://xhelmboyx.tripod.com/formats/mpeg-layout.txt
2219 * In addition, it allows the visual object sequence header to be
2220 * absent, and even the VOS header to be absent. In the latter case,
2221 * a number of VOPs have to be present.
2224 mpeg4_video_type_find (GstTypeFind * tf, gpointer unused)
2226 DataScanCtx c = { 0, NULL, 0 };
2227 gboolean seen_vios_at_0 = FALSE;
2228 gboolean seen_vios = FALSE;
2229 gboolean seen_vos = FALSE;
2230 gboolean seen_vol = FALSE;
2231 guint num_vop_headers = 0;
2234 while (c.offset < GST_MPEGVID_TYPEFIND_TRY_SYNC) {
2235 if (num_vop_headers >= GST_MPEGVID_TYPEFIND_TRY_PICTURES)
2238 if (!mpeg_find_next_header (tf, &c,
2239 GST_MPEGVID_TYPEFIND_TRY_SYNC - c.offset))
2244 /* visual_object_sequence_start_code */
2247 break; /* Terminate at second vios */
2249 seen_vios_at_0 = TRUE;
2251 data_scan_ctx_advance (tf, &c, 2);
2252 if (!mpeg_find_next_header (tf, &c, 0))
2257 /* Optional metadata */
2259 if (!mpeg_find_next_header (tf, &c, 24))
2263 /* visual_object_start_code (consider it optional) */
2265 data_scan_ctx_advance (tf, &c, 2);
2266 /* may contain ID marker and YUV clamping */
2267 if (!mpeg_find_next_header (tf, &c, 7))
2273 /* video_object_start_code */
2276 break; /* Terminate at second vos */
2278 data_scan_ctx_advance (tf, &c, 2);
2282 /* video_object_layer_start_code */
2283 if (sc >= 0x20 && sc <= 0x2F) {
2285 data_scan_ctx_advance (tf, &c, 5);
2289 /* video_object_plane_start_code */
2292 data_scan_ctx_advance (tf, &c, 2);
2296 /* Unknown start code. */
2299 if (num_vop_headers > 0 || seen_vol) {
2300 GstTypeFindProbability probability = 0;
2302 GST_LOG ("Found %d pictures, vios: %d, vos:%d, vol:%d", num_vop_headers,
2303 seen_vios, seen_vos, seen_vol);
2305 if (num_vop_headers >= GST_MPEGVID_TYPEFIND_TRY_PICTURES && seen_vios_at_0
2306 && seen_vos && seen_vol)
2307 probability = GST_TYPE_FIND_MAXIMUM - 1;
2308 else if (num_vop_headers >= GST_MPEGVID_TYPEFIND_TRY_PICTURES && seen_vios
2309 && seen_vos && seen_vol)
2310 probability = GST_TYPE_FIND_NEARLY_CERTAIN - 1;
2311 else if (seen_vios_at_0 && seen_vos && seen_vol)
2312 probability = GST_TYPE_FIND_NEARLY_CERTAIN - 6;
2313 else if (num_vop_headers >= GST_MPEGVID_TYPEFIND_TRY_PICTURES && seen_vos
2315 probability = GST_TYPE_FIND_NEARLY_CERTAIN - 6;
2316 else if (num_vop_headers >= GST_MPEGVID_TYPEFIND_TRY_PICTURES && seen_vol)
2317 probability = GST_TYPE_FIND_NEARLY_CERTAIN - 9;
2318 else if (num_vop_headers >= GST_MPEGVID_TYPEFIND_TRY_PICTURES)
2319 probability = GST_TYPE_FIND_LIKELY - 1;
2320 else if (num_vop_headers > 2 && seen_vios && seen_vos && seen_vol)
2321 probability = GST_TYPE_FIND_LIKELY - 9;
2322 else if (seen_vios && seen_vos && seen_vol)
2323 probability = GST_TYPE_FIND_LIKELY - 20;
2324 else if (num_vop_headers > 0 && seen_vos && seen_vol)
2325 probability = GST_TYPE_FIND_POSSIBLE;
2326 else if (num_vop_headers > 0)
2327 probability = GST_TYPE_FIND_POSSIBLE - 10;
2328 else if (seen_vos && seen_vol)
2329 probability = GST_TYPE_FIND_POSSIBLE - 20;
2331 gst_type_find_suggest (tf, probability, MPEG4_VIDEO_CAPS);
2335 /*** video/x-h263 H263 video stream ***/
2336 static GstStaticCaps h263_video_caps = GST_STATIC_CAPS ("video/x-h263");
2338 #define H263_VIDEO_CAPS gst_static_caps_get(&h263_video_caps)
2340 #define H263_MAX_PROBE_LENGTH (128 * 1024)
2343 h263_video_type_find (GstTypeFind * tf, gpointer unused)
2345 DataScanCtx c = { 0, NULL, 0 };
2353 while (c.offset < H263_MAX_PROBE_LENGTH) {
2354 if (G_UNLIKELY (!data_scan_ctx_ensure_data (tf, &c, 4)))
2357 /* Find the picture start code */
2358 data = (data << 8) + c.data[0];
2359 psc = data & G_GUINT64_CONSTANT (0xfffffc0000);
2360 if (psc == 0x800000) {
2363 tr = (data & 0x3fc) >> 2;
2367 /* Now that we have a Valid PSC, check if we also have a valid PTYPE and
2368 the Source Format, which should range between 1 and 5 */
2369 if (((tr >> 6) == 0x2) && (format > 0 && format < 6))
2374 /* FIXME: maybe bail out early if we get mostly bad syncs ? */
2377 data_scan_ctx_advance (tf, &c, 1);
2380 if (good > 0 && bad == 0)
2381 gst_type_find_suggest (tf, GST_TYPE_FIND_LIKELY, H263_VIDEO_CAPS);
2382 else if (good > 2 * bad)
2383 gst_type_find_suggest (tf, GST_TYPE_FIND_POSSIBLE, H263_VIDEO_CAPS);
2388 /*** video/x-h264 H264 elementary video stream ***/
2390 static GstStaticCaps h264_video_caps =
2391 GST_STATIC_CAPS ("video/x-h264,stream-format=byte-stream");
2393 #define H264_VIDEO_CAPS gst_static_caps_get(&h264_video_caps)
2395 #define H264_MAX_PROBE_LENGTH (128 * 1024) /* 128kB for HD should be enough. */
2398 h264_video_type_find (GstTypeFind * tf, gpointer unused)
2400 DataScanCtx c = { 0, NULL, 0 };
2402 /* Stream consists of: a series of sync codes (00 00 00 01) followed
2405 gboolean seen_idr = FALSE;
2406 gboolean seen_sps = FALSE;
2407 gboolean seen_pps = FALSE;
2412 while (c.offset < H264_MAX_PROBE_LENGTH) {
2413 if (G_UNLIKELY (!data_scan_ctx_ensure_data (tf, &c, 4)))
2416 if (IS_MPEG_HEADER (c.data)) {
2417 nut = c.data[3] & 0x9f; /* forbiden_zero_bit | nal_unit_type */
2418 ref = c.data[3] & 0x60; /* nal_ref_idc */
2420 /* if forbidden bit is different to 0 won't be h264 */
2426 /* collect statistics about the NAL types */
2427 if ((nut >= 1 && nut <= 13) || nut == 19) {
2428 if ((nut == 5 && ref == 0) ||
2429 ((nut == 6 || (nut >= 9 && nut <= 12)) && ref != 0)) {
2441 } else if (nut >= 14 && nut <= 33) {
2443 /* Theoretically these are good, since if they exist in the
2444 stream it merely means that a newer backwards-compatible
2445 h.264 stream. But we should be identifying that separately. */
2448 /* unspecified, application specific */
2449 /* don't consider these bad */
2452 GST_LOG ("good:%d, bad:%d, pps:%d, sps:%d, idr:%d", good, bad, seen_pps,
2453 seen_sps, seen_idr);
2455 if (seen_sps && seen_pps && seen_idr && good >= 10 && bad < 4) {
2456 gst_type_find_suggest (tf, GST_TYPE_FIND_LIKELY, H264_VIDEO_CAPS);
2460 data_scan_ctx_advance (tf, &c, 4);
2462 data_scan_ctx_advance (tf, &c, 1);
2465 GST_LOG ("good:%d, bad:%d, pps:%d, sps:%d, idr:%d", good, bad, seen_pps,
2466 seen_sps, seen_idr);
2468 if (good >= 2 && bad == 0) {
2469 gst_type_find_suggest (tf, GST_TYPE_FIND_POSSIBLE, H264_VIDEO_CAPS);
2473 /*** video/mpeg video stream ***/
2475 static GstStaticCaps mpeg_video_caps = GST_STATIC_CAPS ("video/mpeg, "
2476 "systemstream = (boolean) false");
2477 #define MPEG_VIDEO_CAPS gst_static_caps_get(&mpeg_video_caps)
2480 * Idea is the same as MPEG system stream typefinding: We check each
2481 * byte of the stream to see if - from that point on - the stream
2482 * matches a predefined set of marker bits as defined in the MPEG
2485 * I'm sure someone will do a chance calculation here too.
2489 mpeg_video_stream_type_find (GstTypeFind * tf, gpointer unused)
2491 DataScanCtx c = { 0, NULL, 0 };
2492 gboolean seen_seq_at_0 = FALSE;
2493 gboolean seen_seq = FALSE;
2494 gboolean seen_gop = FALSE;
2495 guint64 last_pic_offset = 0;
2496 guint num_pic_headers = 0;
2499 while (c.offset < GST_MPEGVID_TYPEFIND_TRY_SYNC) {
2500 if (found >= GST_MPEGVID_TYPEFIND_TRY_PICTURES)
2503 if (!data_scan_ctx_ensure_data (tf, &c, 5))
2506 if (!IS_MPEG_HEADER (c.data))
2509 /* a pack header indicates that this isn't an elementary stream */
2510 if (c.data[3] == 0xBA && mpeg_sys_is_valid_pack (tf, c.data, c.size, NULL))
2513 /* do we have a sequence header? */
2514 if (c.data[3] == 0xB3) {
2515 seen_seq_at_0 = seen_seq_at_0 || (c.offset == 0);
2517 data_scan_ctx_advance (tf, &c, 4 + 8);
2521 /* or a GOP header */
2522 if (c.data[3] == 0xB8) {
2524 data_scan_ctx_advance (tf, &c, 8);
2528 /* but what we'd really like to see is a picture header */
2529 if (c.data[3] == 0x00) {
2531 last_pic_offset = c.offset;
2532 data_scan_ctx_advance (tf, &c, 8);
2536 /* ... each followed by a slice header with slice_vertical_pos=1 that's
2537 * not too far away from the previously seen picture header. */
2538 if (c.data[3] == 0x01 && num_pic_headers > found &&
2539 (c.offset - last_pic_offset) >= 4 &&
2540 (c.offset - last_pic_offset) <= 64) {
2541 data_scan_ctx_advance (tf, &c, 4);
2548 data_scan_ctx_advance (tf, &c, 1);
2551 if (found > 0 || seen_seq) {
2552 GstTypeFindProbability probability = 0;
2554 GST_LOG ("Found %d pictures, seq:%d, gop:%d", found, seen_seq, seen_gop);
2556 if (found >= GST_MPEGVID_TYPEFIND_TRY_PICTURES && seen_seq && seen_gop)
2557 probability = GST_TYPE_FIND_NEARLY_CERTAIN - 1;
2558 else if (found >= GST_MPEGVID_TYPEFIND_TRY_PICTURES && seen_seq)
2559 probability = GST_TYPE_FIND_NEARLY_CERTAIN - 9;
2560 else if (found >= GST_MPEGVID_TYPEFIND_TRY_PICTURES)
2561 probability = GST_TYPE_FIND_LIKELY;
2562 else if (seen_seq_at_0 && seen_gop && found > 2)
2563 probability = GST_TYPE_FIND_LIKELY - 10;
2564 else if (seen_seq && seen_gop && found > 2)
2565 probability = GST_TYPE_FIND_LIKELY - 20;
2566 else if (seen_seq_at_0 && found > 0)
2567 probability = GST_TYPE_FIND_POSSIBLE;
2568 else if (seen_seq && found > 0)
2569 probability = GST_TYPE_FIND_POSSIBLE - 5;
2571 probability = GST_TYPE_FIND_POSSIBLE - 10;
2573 probability = GST_TYPE_FIND_POSSIBLE - 20;
2575 gst_type_find_suggest_simple (tf, probability, "video/mpeg",
2576 "systemstream", G_TYPE_BOOLEAN, FALSE,
2577 "mpegversion", G_TYPE_INT, 1, NULL);
2581 /*** audio/x-aiff ***/
2583 static GstStaticCaps aiff_caps = GST_STATIC_CAPS ("audio/x-aiff");
2585 #define AIFF_CAPS gst_static_caps_get(&aiff_caps)
2587 aiff_type_find (GstTypeFind * tf, gpointer unused)
2589 const guint8 *data = gst_type_find_peek (tf, 0, 4);
2591 if (data && memcmp (data, "FORM", 4) == 0) {
2593 if (memcmp (data, "AIFF", 4) == 0 || memcmp (data, "AIFC", 4) == 0)
2594 gst_type_find_suggest (tf, GST_TYPE_FIND_MAXIMUM, AIFF_CAPS);
2598 /*** audio/x-svx ***/
2600 static GstStaticCaps svx_caps = GST_STATIC_CAPS ("audio/x-svx");
2602 #define SVX_CAPS gst_static_caps_get(&svx_caps)
2604 svx_type_find (GstTypeFind * tf, gpointer unused)
2606 const guint8 *data = gst_type_find_peek (tf, 0, 4);
2608 if (data && memcmp (data, "FORM", 4) == 0) {
2610 if (memcmp (data, "8SVX", 4) == 0 || memcmp (data, "16SV", 4) == 0)
2611 gst_type_find_suggest (tf, GST_TYPE_FIND_MAXIMUM, SVX_CAPS);
2615 /*** audio/x-shorten ***/
2617 static GstStaticCaps shn_caps = GST_STATIC_CAPS ("audio/x-shorten");
2619 #define SHN_CAPS gst_static_caps_get(&shn_caps)
2621 shn_type_find (GstTypeFind * tf, gpointer unused)
2623 const guint8 *data = gst_type_find_peek (tf, 0, 4);
2625 if (data && memcmp (data, "ajkg", 4) == 0) {
2626 gst_type_find_suggest (tf, GST_TYPE_FIND_MAXIMUM, SHN_CAPS);
2628 data = gst_type_find_peek (tf, -8, 8);
2629 if (data && memcmp (data, "SHNAMPSK", 8) == 0) {
2630 gst_type_find_suggest (tf, GST_TYPE_FIND_MAXIMUM, SHN_CAPS);
2634 /*** application/x-ape ***/
2636 static GstStaticCaps ape_caps = GST_STATIC_CAPS ("application/x-ape");
2638 #define APE_CAPS gst_static_caps_get(&ape_caps)
2640 ape_type_find (GstTypeFind * tf, gpointer unused)
2642 const guint8 *data = gst_type_find_peek (tf, 0, 4);
2644 if (data && memcmp (data, "MAC ", 4) == 0) {
2645 gst_type_find_suggest (tf, GST_TYPE_FIND_LIKELY + 10, APE_CAPS);
2649 /*** ISO FORMATS ***/
2651 /*** audio/x-m4a ***/
2653 static GstStaticCaps m4a_caps = GST_STATIC_CAPS ("audio/x-m4a");
2655 #define M4A_CAPS (gst_static_caps_get(&m4a_caps))
2657 m4a_type_find (GstTypeFind * tf, gpointer unused)
2659 const guint8 *data = gst_type_find_peek (tf, 4, 8);
2661 if (data && (memcmp (data, "ftypM4A ", 8) == 0)) {
2662 gst_type_find_suggest (tf, GST_TYPE_FIND_MAXIMUM, M4A_CAPS);
2666 /*** application/x-3gp ***/
2668 /* The Q is there because variables can't start with a number. */
2669 static GstStaticCaps q3gp_caps = GST_STATIC_CAPS ("application/x-3gp");
2670 #define Q3GP_CAPS (gst_static_caps_get(&q3gp_caps))
2672 static const gchar *
2673 q3gp_type_find_get_profile (const guint8 * data)
2675 switch (GST_MAKE_FOURCC (data[0], data[1], data[2], 0)) {
2676 case GST_MAKE_FOURCC ('3', 'g', 'g', 0):
2678 case GST_MAKE_FOURCC ('3', 'g', 'p', 0):
2680 case GST_MAKE_FOURCC ('3', 'g', 's', 0):
2681 return "streaming-server";
2682 case GST_MAKE_FOURCC ('3', 'g', 'r', 0):
2683 return "progressive-download";
2691 q3gp_type_find (GstTypeFind * tf, gpointer unused)
2693 const gchar *profile;
2694 guint32 ftyp_size = 0;
2696 const guint8 *data = NULL;
2698 if ((data = gst_type_find_peek (tf, 0, 12)) == NULL) {
2703 if (memcmp (data, "ftyp", 4) != 0) {
2707 /* check major brand */
2709 if ((profile = q3gp_type_find_get_profile (data))) {
2710 gst_type_find_suggest_simple (tf, GST_TYPE_FIND_MAXIMUM,
2711 "application/x-3gp", "profile", G_TYPE_STRING, profile, NULL);
2715 /* check compatible brands */
2716 if ((data = gst_type_find_peek (tf, 0, 4)) != NULL) {
2717 ftyp_size = GST_READ_UINT32_BE (data);
2719 for (offset = 16; offset < ftyp_size; offset += 4) {
2720 if ((data = gst_type_find_peek (tf, offset, 3)) == NULL) {
2723 if ((profile = q3gp_type_find_get_profile (data))) {
2724 gst_type_find_suggest_simple (tf, GST_TYPE_FIND_MAXIMUM,
2725 "application/x-3gp", "profile", G_TYPE_STRING, profile, NULL);
2734 /*** video/mj2 and image/jp2 ***/
2735 static GstStaticCaps mj2_caps = GST_STATIC_CAPS ("video/mj2");
2737 #define MJ2_CAPS gst_static_caps_get(&mj2_caps)
2739 static GstStaticCaps jp2_caps = GST_STATIC_CAPS ("image/jp2");
2741 #define JP2_CAPS gst_static_caps_get(&jp2_caps)
2744 jp2_type_find (GstTypeFind * tf, gpointer unused)
2748 data = gst_type_find_peek (tf, 0, 24);
2753 if (memcmp (data, "\000\000\000\014jP \015\012\207\012", 12) != 0)
2756 /* check ftyp box */
2758 if (memcmp (data + 4, "ftyp", 4) == 0) {
2759 if (memcmp (data + 8, "jp2 ", 4) == 0)
2760 gst_type_find_suggest (tf, GST_TYPE_FIND_MAXIMUM, JP2_CAPS);
2761 else if (memcmp (data + 8, "mjp2", 4) == 0)
2762 gst_type_find_suggest (tf, GST_TYPE_FIND_MAXIMUM, MJ2_CAPS);
2766 /*** video/quicktime ***/
2768 static GstStaticCaps qt_caps = GST_STATIC_CAPS ("video/quicktime");
2770 #define QT_CAPS gst_static_caps_get(&qt_caps)
2771 #define STRNCMP(x,y,z) (strncmp ((char*)(x), (char*)(y), z))
2773 /* FIXME 0.11: go through http://www.ftyps.com/ */
2775 qt_type_find (GstTypeFind * tf, gpointer unused)
2781 const gchar *variant = NULL;
2783 while ((data = gst_type_find_peek (tf, offset, 12)) != NULL) {
2786 if (STRNCMP (&data[4], "ftypqt ", 8) == 0) {
2787 tip = GST_TYPE_FIND_MAXIMUM;
2791 if (STRNCMP (&data[4], "ftypisom", 8) == 0 ||
2792 STRNCMP (&data[4], "ftypavc1", 8) == 0 ||
2793 STRNCMP (&data[4], "ftypmp42", 8) == 0) {
2794 tip = GST_TYPE_FIND_MAXIMUM;
2799 /* box/atom types that are in common with ISO base media file format */
2800 if (STRNCMP (&data[4], "moov", 4) == 0 ||
2801 STRNCMP (&data[4], "mdat", 4) == 0 ||
2802 STRNCMP (&data[4], "ftyp", 4) == 0 ||
2803 STRNCMP (&data[4], "free", 4) == 0 ||
2804 STRNCMP (&data[4], "uuid", 4) == 0 ||
2805 STRNCMP (&data[4], "skip", 4) == 0) {
2807 tip = GST_TYPE_FIND_LIKELY;
2809 tip = GST_TYPE_FIND_NEARLY_CERTAIN;
2812 /* other box/atom types, apparently quicktime specific */
2813 else if (STRNCMP (&data[4], "pnot", 4) == 0 ||
2814 STRNCMP (&data[4], "PICT", 4) == 0 ||
2815 STRNCMP (&data[4], "wide", 4) == 0 ||
2816 STRNCMP (&data[4], "prfl", 4) == 0) {
2817 tip = GST_TYPE_FIND_MAXIMUM;
2824 size = GST_READ_UINT32_BE (data);
2825 /* check compatible brands rather than ever expaning major brands above */
2826 if ((STRNCMP (&data[4], "ftyp", 4) == 0) && (size >= 16)) {
2827 new_offset = offset + 12;
2828 while (new_offset + 4 <= offset + size) {
2829 data = gst_type_find_peek (tf, new_offset, 4);
2832 if (STRNCMP (&data[4], "isom", 4) == 0 ||
2833 STRNCMP (&data[4], "avc1", 4) == 0 ||
2834 STRNCMP (&data[4], "mp41", 4) == 0 ||
2835 STRNCMP (&data[4], "mp42", 4) == 0) {
2836 tip = GST_TYPE_FIND_MAXIMUM;
2844 const guint8 *sizedata;
2846 sizedata = gst_type_find_peek (tf, offset + 8, 8);
2847 if (sizedata == NULL)
2850 size = GST_READ_UINT64_BE (sizedata);
2855 new_offset = offset + size;
2856 if (new_offset <= offset)
2858 offset = new_offset;
2864 GstCaps *caps = gst_caps_copy (QT_CAPS);
2866 gst_caps_set_simple (caps, "variant", G_TYPE_STRING, variant, NULL);
2867 gst_type_find_suggest (tf, tip, caps);
2868 gst_caps_unref (caps);
2870 gst_type_find_suggest (tf, tip, QT_CAPS);
2876 /*** image/x-quicktime ***/
2878 static GstStaticCaps qtif_caps = GST_STATIC_CAPS ("image/x-quicktime");
2880 #define QTIF_CAPS gst_static_caps_get(&qtif_caps)
2882 /* how many atoms we check before we give up */
2883 #define QTIF_MAXROUNDS 25
2886 qtif_type_find (GstTypeFind * tf, gpointer unused)
2889 gboolean found_idsc = FALSE;
2890 gboolean found_idat = FALSE;
2894 while ((data = gst_type_find_peek (tf, offset, 8)) != NULL) {
2897 size = GST_READ_UINT32_BE (data);
2899 const guint8 *sizedata;
2901 sizedata = gst_type_find_peek (tf, offset + 8, 8);
2902 if (sizedata == NULL)
2905 size = GST_READ_UINT64_BE (sizedata);
2910 if (STRNCMP (data + 4, "idsc", 4) == 0)
2912 if (STRNCMP (data + 4, "idat", 4) == 0)
2915 if (found_idsc && found_idat) {
2916 gst_type_find_suggest (tf, GST_TYPE_FIND_MAXIMUM, QTIF_CAPS);
2921 if (++rounds > QTIF_MAXROUNDS)
2925 if (found_idsc || found_idat) {
2926 gst_type_find_suggest (tf, GST_TYPE_FIND_LIKELY, QTIF_CAPS);
2931 /*** audio/x-mod ***/
2933 static GstStaticCaps mod_caps = GST_STATIC_CAPS ("audio/x-mod");
2935 #define MOD_CAPS gst_static_caps_get(&mod_caps)
2936 /* FIXME: M15 CheckType to do */
2938 mod_type_find (GstTypeFind * tf, gpointer unused)
2943 if ((data = gst_type_find_peek (tf, 1080, 4)) != NULL) {
2944 /* Protracker and variants */
2945 if ((memcmp (data, "M.K.", 4) == 0) || (memcmp (data, "M!K!", 4) == 0) ||
2947 (memcmp (data, "FLT", 3) == 0 && isdigit (data[3])) ||
2948 (memcmp (data, "EXO", 3) == 0 && isdigit (data[3])) ||
2949 /* Oktalyzer (Amiga) */
2950 (memcmp (data, "OKTA", 4) == 0) ||
2951 /* Oktalyser (Atari) */
2952 (memcmp (data, "CD81", 4) == 0) ||
2954 (memcmp (data + 1, "CHN", 3) == 0 && isdigit (data[0])) ||
2955 /* Fasttracker or Taketracker */
2956 (memcmp (data + 2, "CH", 2) == 0 && isdigit (data[0])
2957 && isdigit (data[1])) || (memcmp (data + 2, "CN", 2) == 0
2958 && isdigit (data[0]) && isdigit (data[1]))) {
2959 gst_type_find_suggest (tf, GST_TYPE_FIND_MAXIMUM, MOD_CAPS);
2964 if ((data = gst_type_find_peek (tf, 0, 38)) != NULL) {
2965 if (memcmp (data, "Extended Module: ", 17) == 0 && data[37] == 0x1A) {
2966 gst_type_find_suggest (tf, GST_TYPE_FIND_MAXIMUM, MOD_CAPS);
2971 if (data || (data = gst_type_find_peek (tf, 0, 8)) != NULL) {
2972 if (memcmp (data, "OKTASONG", 8) == 0) {
2973 gst_type_find_suggest (tf, GST_TYPE_FIND_MAXIMUM, MOD_CAPS);
2977 if (data || (data = gst_type_find_peek (tf, 0, 4)) != NULL) {
2979 if ((memcmp (data, "if", 2) == 0) || (memcmp (data, "JN", 2) == 0)) {
2980 gst_type_find_suggest (tf, GST_TYPE_FIND_LIKELY, MOD_CAPS);
2984 if ((memcmp (data, "AMF", 3) == 0 && data[3] > 10 && data[3] < 14) ||
2986 (memcmp (data, "IMPM", 4) == 0) ||
2988 (memcmp (data, "MMD0", 4) == 0) || (memcmp (data, "MMD1", 4) == 0) ||
2990 (memcmp (data, "MTM", 3) == 0)) {
2991 gst_type_find_suggest (tf, GST_TYPE_FIND_MAXIMUM, MOD_CAPS);
2995 if (memcmp (data, "RIFF", 4) == 0) {
2996 const guint8 *data2 = gst_type_find_peek (tf, 8, 4);
2999 if (memcmp (data2, "DSMF", 4) == 0) {
3000 gst_type_find_suggest (tf, GST_TYPE_FIND_MAXIMUM, MOD_CAPS);
3006 if (memcmp (data, "FAM\xFE", 4) == 0) {
3007 const guint8 *data2 = gst_type_find_peek (tf, 44, 3);
3010 if (memcmp (data2, "compare", 3) == 0) {
3011 gst_type_find_suggest (tf, GST_TYPE_FIND_MAXIMUM, MOD_CAPS);
3015 gst_type_find_suggest (tf, GST_TYPE_FIND_LIKELY, MOD_CAPS);
3020 if (memcmp (data, "GDM\xFE", 4) == 0) {
3021 const guint8 *data2 = gst_type_find_peek (tf, 71, 4);
3024 if (memcmp (data2, "GMFS", 4) == 0) {
3025 gst_type_find_suggest (tf, GST_TYPE_FIND_MAXIMUM, MOD_CAPS);
3029 gst_type_find_suggest (tf, GST_TYPE_FIND_LIKELY, MOD_CAPS);
3035 if ((data = gst_type_find_peek (tf, 60, 4)) != NULL) {
3036 if (memcmp (data, "IM10", 4) == 0) {
3037 gst_type_find_suggest (tf, GST_TYPE_FIND_MAXIMUM, MOD_CAPS);
3042 if ((data = gst_type_find_peek (tf, 44, 4)) != NULL) {
3043 if (memcmp (data, "SCRM", 4) == 0) {
3044 gst_type_find_suggest (tf, GST_TYPE_FIND_MAXIMUM, MOD_CAPS);
3049 if ((data = gst_type_find_peek (tf, 20, 8)) != NULL) {
3050 if (g_ascii_strncasecmp ((gchar *) data, "!Scream!", 8) == 0 ||
3051 g_ascii_strncasecmp ((gchar *) data, "BMOD2STM", 8) == 0) {
3052 const guint8 *id, *stmtype;
3054 if ((id = gst_type_find_peek (tf, 28, 1)) == NULL)
3056 if ((stmtype = gst_type_find_peek (tf, 29, 1)) == NULL)
3058 if (*id == 0x1A && *stmtype == 2)
3059 gst_type_find_suggest (tf, GST_TYPE_FIND_MAXIMUM, MOD_CAPS);
3064 if ((data = gst_type_find_peek (tf, 0, 19)) != NULL) {
3065 if (memcmp (data, "ASYLUM Music Format", 19) == 0) {
3066 gst_type_find_suggest (tf, GST_TYPE_FIND_MAXIMUM, MOD_CAPS);
3072 /*** application/x-shockwave-flash ***/
3074 static GstStaticCaps swf_caps =
3075 GST_STATIC_CAPS ("application/x-shockwave-flash");
3076 #define SWF_CAPS (gst_static_caps_get(&swf_caps))
3078 swf_type_find (GstTypeFind * tf, gpointer unused)
3080 const guint8 *data = gst_type_find_peek (tf, 0, 4);
3082 if (data && (data[0] == 'F' || data[0] == 'C') &&
3083 data[1] == 'W' && data[2] == 'S') {
3084 gst_type_find_suggest (tf, GST_TYPE_FIND_MAXIMUM, SWF_CAPS);
3088 /*** image/jpeg ***/
3090 #define JPEG_MARKER_IS_START_OF_FRAME(x) \
3091 ((x)>=0xc0 && (x) <= 0xcf && (x)!=0xc4 && (x)!=0xc8 && (x)!=0xcc)
3093 static GstStaticCaps jpeg_caps = GST_STATIC_CAPS ("image/jpeg");
3095 #define JPEG_CAPS (gst_static_caps_get(&jpeg_caps))
3097 jpeg_type_find (GstTypeFind * tf, gpointer unused)
3099 GstTypeFindProbability prob = GST_TYPE_FIND_POSSIBLE;
3100 DataScanCtx c = { 0, NULL, 0 };
3104 if (G_UNLIKELY (!data_scan_ctx_ensure_data (tf, &c, 2)))
3107 if (c.data[0] != 0xff || c.data[1] != 0xd8)
3111 data_scan_ctx_advance (tf, &c, 2);
3113 caps = gst_caps_copy (JPEG_CAPS);
3115 while (data_scan_ctx_ensure_data (tf, &c, 4) && c.offset < (200 * 1024)) {
3119 if (c.data[0] != 0xff)
3123 if (G_UNLIKELY (marker == 0xff)) {
3124 data_scan_ctx_advance (tf, &c, 1);
3128 data_scan_ctx_advance (tf, &c, 2);
3130 /* we assume all markers we'll see before SOF have a payload length; if
3131 * that's not the case we'll just detect a false sync and bail out, but
3132 * still report POSSIBLE probability */
3133 len = GST_READ_UINT16_BE (c.data);
3135 GST_LOG ("possible JPEG marker 0x%02x (@0x%04x), segment length %u",
3136 marker, (guint) c.offset, len);
3138 if (!data_scan_ctx_ensure_data (tf, &c, len))
3141 if (marker == 0xc4 || /* DEFINE_HUFFMAN_TABLES */
3142 marker == 0xcc || /* DEFINE_ARITHMETIC_CONDITIONING */
3143 marker == 0xdb || /* DEFINE_QUANTIZATION_TABLES */
3144 marker == 0xdd || /* DEFINE_RESTART_INTERVAL */
3145 marker == 0xfe) { /* COMMENT */
3146 data_scan_ctx_advance (tf, &c, len);
3148 } else if (marker == 0xe0 && len >= (2 + 4) && /* APP0 */
3149 data_scan_ctx_memcmp (tf, &c, 2, "JFIF", 4)) {
3150 GST_LOG ("found JFIF tag");
3151 prob = GST_TYPE_FIND_MAXIMUM;
3152 data_scan_ctx_advance (tf, &c, len);
3154 /* we continue until we find a start of frame marker */
3155 } else if (marker == 0xe1 && len >= (2 + 4) && /* APP1 */
3156 data_scan_ctx_memcmp (tf, &c, 2, "Exif", 4)) {
3157 GST_LOG ("found Exif tag");
3158 prob = GST_TYPE_FIND_MAXIMUM;
3159 data_scan_ctx_advance (tf, &c, len);
3161 /* we continue until we find a start of frame marker */
3162 } else if (marker >= 0xe0 && marker <= 0xef) { /* APPn */
3163 data_scan_ctx_advance (tf, &c, len);
3165 } else if (JPEG_MARKER_IS_START_OF_FRAME (marker) && len >= (2 + 8)) {
3168 h = GST_READ_UINT16_BE (c.data + 2 + 1);
3169 w = GST_READ_UINT16_BE (c.data + 2 + 1 + 2);
3170 if (h == 0 || w == 0) {
3171 GST_WARNING ("bad width %u and/or height %u in SOF header", w, h);
3175 GST_LOG ("SOF at offset %" G_GUINT64_FORMAT ", num_markers=%d, "
3176 "WxH=%dx%d", c.offset - 2, num_markers, w, h);
3178 if (num_markers >= 5 || prob == GST_TYPE_FIND_MAXIMUM)
3179 prob = GST_TYPE_FIND_MAXIMUM;
3181 prob = GST_TYPE_FIND_LIKELY;
3183 gst_caps_set_simple (caps, "width", G_TYPE_INT, w,
3184 "height", G_TYPE_INT, h, "sof-marker", G_TYPE_INT, marker & 0xf,
3189 GST_WARNING ("bad length or unexpected JPEG marker 0xff 0x%02x", marker);
3194 gst_type_find_suggest (tf, prob, caps);
3195 gst_caps_unref (caps);
3200 static GstStaticCaps bmp_caps = GST_STATIC_CAPS ("image/bmp");
3202 #define BMP_CAPS (gst_static_caps_get(&bmp_caps))
3204 bmp_type_find (GstTypeFind * tf, gpointer unused)
3206 DataScanCtx c = { 0, NULL, 0 };
3207 guint32 struct_size, w, h, planes, bpp;
3209 if (G_UNLIKELY (!data_scan_ctx_ensure_data (tf, &c, 54)))
3212 if (c.data[0] != 'B' || c.data[1] != 'M')
3215 /* skip marker + size */
3216 data_scan_ctx_advance (tf, &c, 2 + 4);
3218 /* reserved, must be 0 */
3219 if (c.data[0] != 0 || c.data[1] != 0 || c.data[2] != 0 || c.data[3] != 0)
3222 data_scan_ctx_advance (tf, &c, 2 + 2);
3224 /* offset to start of image data in bytes (check for sanity) */
3225 GST_LOG ("offset=%u", GST_READ_UINT32_LE (c.data));
3226 if (GST_READ_UINT32_LE (c.data) > (10 * 1024 * 1024))
3229 struct_size = GST_READ_UINT32_LE (c.data + 4);
3230 GST_LOG ("struct_size=%u", struct_size);
3232 data_scan_ctx_advance (tf, &c, 4 + 4);
3234 if (struct_size == 0x0C) {
3235 w = GST_READ_UINT16_LE (c.data);
3236 h = GST_READ_UINT16_LE (c.data + 2);
3237 planes = GST_READ_UINT16_LE (c.data + 2 + 2);
3238 bpp = GST_READ_UINT16_LE (c.data + 2 + 2 + 2);
3239 } else if (struct_size == 40 || struct_size == 64 || struct_size == 108
3240 || struct_size == 124 || struct_size == 0xF0) {
3241 w = GST_READ_UINT32_LE (c.data);
3242 h = GST_READ_UINT32_LE (c.data + 4);
3243 planes = GST_READ_UINT16_LE (c.data + 4 + 4);
3244 bpp = GST_READ_UINT16_LE (c.data + 4 + 4 + 2);
3249 /* image sizes sanity check */
3250 GST_LOG ("w=%u, h=%u, planes=%u, bpp=%u", w, h, planes, bpp);
3251 if (w == 0 || w > 0xfffff || h == 0 || h > 0xfffff || planes != 1 ||
3252 (bpp != 1 && bpp != 4 && bpp != 8 && bpp != 16 && bpp != 24 && bpp != 32))
3255 gst_type_find_suggest_simple (tf, GST_TYPE_FIND_MAXIMUM, "image/bmp",
3256 "width", G_TYPE_INT, w, "height", G_TYPE_INT, h, "bpp", G_TYPE_INT, bpp,
3260 /*** image/tiff ***/
3261 static GstStaticCaps tiff_caps = GST_STATIC_CAPS ("image/tiff, "
3262 "endianness = (int) { BIG_ENDIAN, LITTLE_ENDIAN }");
3263 #define TIFF_CAPS (gst_static_caps_get(&tiff_caps))
3264 static GstStaticCaps tiff_be_caps = GST_STATIC_CAPS ("image/tiff, "
3265 "endianness = (int) BIG_ENDIAN");
3266 #define TIFF_BE_CAPS (gst_static_caps_get(&tiff_be_caps))
3267 static GstStaticCaps tiff_le_caps = GST_STATIC_CAPS ("image/tiff, "
3268 "endianness = (int) LITTLE_ENDIAN");
3269 #define TIFF_LE_CAPS (gst_static_caps_get(&tiff_le_caps))
3271 tiff_type_find (GstTypeFind * tf, gpointer ununsed)
3273 const guint8 *data = gst_type_find_peek (tf, 0, 8);
3274 guint8 le_header[4] = { 0x49, 0x49, 0x2A, 0x00 };
3275 guint8 be_header[4] = { 0x4D, 0x4D, 0x00, 0x2A };
3278 if (memcmp (data, le_header, 4) == 0) {
3279 gst_type_find_suggest (tf, GST_TYPE_FIND_MAXIMUM, TIFF_LE_CAPS);
3280 } else if (memcmp (data, be_header, 4) == 0) {
3281 gst_type_find_suggest (tf, GST_TYPE_FIND_MAXIMUM, TIFF_BE_CAPS);
3288 static GstStaticCaps pnm_caps = GST_STATIC_CAPS ("image/x-portable-bitmap; "
3289 "image/x-portable-graymap; image/x-portable-pixmap; "
3290 "image/x-portable-anymap");
3292 #define PNM_CAPS (gst_static_caps_get(&pnm_caps))
3294 #define IS_PNM_WHITESPACE(c) \
3295 ((c) == ' ' || (c) == '\r' || (c) == '\n' || (c) == 't')
3298 pnm_type_find (GstTypeFind * tf, gpointer ununsed)
3300 const gchar *media_type = NULL;
3301 DataScanCtx c = { 0, NULL, 0 };
3304 if (G_UNLIKELY (!data_scan_ctx_ensure_data (tf, &c, 16)))
3307 /* see http://en.wikipedia.org/wiki/Netpbm_format */
3308 if (c.data[0] != 'P' || c.data[1] < '1' || c.data[1] > '7' ||
3309 !IS_PNM_WHITESPACE (c.data[2]) ||
3310 (c.data[3] != '#' && c.data[3] < '0' && c.data[3] > '9'))
3313 switch (c.data[1]) {
3315 media_type = "image/x-portable-bitmap"; /* ASCII */
3318 media_type = "image/x-portable-graymap"; /* ASCII */
3321 media_type = "image/x-portable-pixmap"; /* ASCII */
3324 media_type = "image/x-portable-bitmap"; /* Raw */
3327 media_type = "image/x-portable-graymap"; /* Raw */
3330 media_type = "image/x-portable-pixmap"; /* Raw */
3333 media_type = "image/x-portable-anymap";
3336 g_return_if_reached ();
3339 /* try to extract width and height as well */
3340 if (c.data[1] != '7') {
3341 gchar s[64] = { 0, }
3344 /* need to skip any comment lines first */
3345 data_scan_ctx_advance (tf, &c, 3);
3346 while (c.data[0] == '#') { /* we know there's still data left */
3347 data_scan_ctx_advance (tf, &c, 1);
3348 while (c.data[0] != '\n' && c.data[0] != '\r') {
3349 if (!data_scan_ctx_ensure_data (tf, &c, 4))
3351 data_scan_ctx_advance (tf, &c, 1);
3353 data_scan_ctx_advance (tf, &c, 1);
3354 GST_LOG ("skipped comment line in PNM header");
3357 if (!data_scan_ctx_ensure_data (tf, &c, 32) &&
3358 !data_scan_ctx_ensure_data (tf, &c, 4)) {
3362 /* need to NUL-terminate data for sscanf */
3363 memcpy (s, c.data, MIN (sizeof (s) - 1, c.size));
3364 if (sscanf (s, "%u%c%u%c", &w, &sep1, &h, &sep2) == 4 &&
3365 IS_PNM_WHITESPACE (sep1) && IS_PNM_WHITESPACE (sep2) &&
3366 w > 0 && w < G_MAXINT && h > 0 && h < G_MAXINT) {
3367 GST_LOG ("extracted PNM width and height: %dx%d", w, h);
3373 /* FIXME: extract width + height for anymaps too */
3376 if (w > 0 && h > 0) {
3377 gst_type_find_suggest_simple (tf, GST_TYPE_FIND_MAXIMUM, media_type,
3378 "width", G_TYPE_INT, w, "height", G_TYPE_INT, h, NULL);
3380 gst_type_find_suggest_simple (tf, GST_TYPE_FIND_LIKELY, media_type, NULL);
3384 static GstStaticCaps sds_caps = GST_STATIC_CAPS ("audio/x-sds");
3386 #define SDS_CAPS (gst_static_caps_get(&sds_caps))
3388 sds_type_find (GstTypeFind * tf, gpointer ununsed)
3390 const guint8 *data = gst_type_find_peek (tf, 0, 4);
3391 guint8 mask[4] = { 0xFF, 0xFF, 0x80, 0xFF };
3392 guint8 match[4] = { 0xF0, 0x7E, 0, 0x01 };
3396 for (x = 0; x < 4; x++) {
3397 if ((data[x] & mask[x]) != match[x]) {
3401 gst_type_find_suggest (tf, GST_TYPE_FIND_MAXIMUM, SDS_CAPS);
3405 static GstStaticCaps ircam_caps = GST_STATIC_CAPS ("audio/x-ircam");
3407 #define IRCAM_CAPS (gst_static_caps_get(&ircam_caps))
3409 ircam_type_find (GstTypeFind * tf, gpointer ununsed)
3411 const guint8 *data = gst_type_find_peek (tf, 0, 4);
3412 guint8 mask[4] = { 0xFF, 0xFF, 0xF8, 0xFF };
3413 guint8 match[4] = { 0x64, 0xA3, 0x00, 0x00 };
3415 gboolean matched = TRUE;
3420 for (x = 0; x < 4; x++) {
3421 if ((data[x] & mask[x]) != match[x]) {
3426 gst_type_find_suggest (tf, GST_TYPE_FIND_MAXIMUM, IRCAM_CAPS);
3429 /* now try the reverse version */
3431 for (x = 0; x < 4; x++) {
3432 if ((data[x] & mask[3 - x]) != match[3 - x]) {
3438 /*** Matroska/WebM ***/
3440 #define EBML_HEADER 0x1A45DFA3
3441 #define EBML_VERSION 0x4286
3442 #define EBML_DOCTYPE 0x4282
3443 #define EBML_DOCTYPE_VERSION 0x4287
3444 #define MATROSKA_SEGMENT 0x18538067
3445 #define MATROSKA_CLUSTER 0x1F43B675
3446 #define MATROSKA_TRACKS 0x1654AE6B
3447 #define MATROSKA_TRACK_ENTRY 0xAE
3448 #define MATROSKA_TRACK_TYPE 0x83
3449 #define MATROSKA_STEREO_MODE 0x53B8
3451 #define EBML_MAX_LEN (2 * 1024 * 1024)
3455 EBML_DOCTYPE_UNKNOWN = 0,
3456 EBML_DOCTYPE_MATROSKA,
3462 GstEbmlDocType doctype;
3468 guint tracks_ok; /* if we've seen and fully parsed the TRACKS element */
3472 ebml_read_chunk_header (GstTypeFind * tf, DataScanCtx * c, guint max_size,
3473 guint32 * id, guint64 * size)
3476 guint msbit_set, i, len, id_len;
3478 if (c->size < 12 || max_size < 1)
3483 if ((c->data[0] & 0x80) == 0x80) {
3485 } else if ((c->data[0] & 0xC0) == 0x40) {
3487 } else if ((c->data[0] & 0xE0) == 0x20) {
3489 } else if ((c->data[0] & 0xF0) == 0x10) {
3495 if (max_size < id_len)
3498 for (i = 1; i < id_len; ++i) {
3499 *id = (*id << 8) | c->data[i];
3502 data_scan_ctx_advance (tf, c, id_len);
3506 if (max_size < 1 || c->data[0] == 0)
3509 msbit_set = g_bit_nth_msf (c->data[0], 8);
3510 mask = ((1 << msbit_set) - 1);
3511 *size = c->data[0] & mask;
3512 len = 7 - msbit_set;
3514 if (max_size < 1 + len)
3516 for (i = 0; i < len; ++i) {
3517 mask = (mask << 8) | 0xff;
3518 *size = (*size << 8) | c->data[1 + i];
3521 data_scan_ctx_advance (tf, c, 1 + len);
3523 /* undefined/unknown size? (all bits 1) */
3524 if (*size == mask) {
3525 /* allow unknown size for SEGMENT chunk, bail out otherwise */
3526 if (*id == MATROSKA_SEGMENT)
3527 *size = G_MAXUINT64;
3532 return id_len + (1 + len);
3536 ebml_parse_chunk (GstTypeFind * tf, DataScanCtx * ctx, guint32 chunk_id,
3537 guint chunk_size, GstMatroskaInfo * info, guint depth)
3538 { /* FIXME: make sure input size is clipped to 32 bit */
3539 static const gchar SPACES[] = " ";
3540 DataScanCtx c = *ctx;
3541 guint64 element_size;
3542 guint32 id, hdr_len;
3544 if (depth >= 8) /* keep SPACES large enough for depth */
3547 while (chunk_size > 0) {
3548 if (c.offset > EBML_MAX_LEN || !data_scan_ctx_ensure_data (tf, &c, 64))
3551 hdr_len = ebml_read_chunk_header (tf, &c, chunk_size, &id, &element_size);
3555 g_assert (hdr_len <= chunk_size);
3556 chunk_size -= hdr_len;
3558 if (element_size > chunk_size)
3561 GST_DEBUG ("%s %08x, size %" G_GUINT64_FORMAT " / %" G_GUINT64_FORMAT,
3562 SPACES + sizeof (SPACES) - 1 - (2 * depth), id, element_size,
3563 hdr_len + element_size);
3565 if (!data_scan_ctx_ensure_data (tf, &c, element_size)) {
3566 GST_DEBUG ("not enough data");
3572 if (element_size >= 8 && memcmp (c.data, "matroska", 8) == 0)
3573 info->doctype = EBML_DOCTYPE_MATROSKA;
3574 else if (element_size >= 4 && memcmp (c.data, "webm", 4) == 0)
3575 info->doctype = EBML_DOCTYPE_WEBM;
3577 case MATROSKA_SEGMENT:
3578 GST_LOG ("parsing segment");
3579 ebml_parse_chunk (tf, &c, id, element_size, info, depth + 1);
3580 GST_LOG ("parsed segment, done");
3582 case MATROSKA_TRACKS:
3583 GST_LOG ("parsing tracks");
3585 ebml_parse_chunk (tf, &c, id, element_size, info, depth + 1);
3586 GST_LOG ("parsed tracks: %s, done (after %" G_GUINT64_FORMAT " bytes)",
3587 info->tracks_ok ? "ok" : "FAIL", c.offset + element_size);
3589 case MATROSKA_TRACK_ENTRY:
3590 GST_LOG ("parsing track entry");
3591 if (!ebml_parse_chunk (tf, &c, id, element_size, info, depth + 1))
3594 case MATROSKA_TRACK_TYPE:{
3597 /* is supposed to always be 1-byte, but not everyone's following that */
3598 for (i = 0; i < element_size; ++i)
3599 type = (type << 8) | c.data[i];
3601 GST_DEBUG ("%s track type %u",
3602 SPACES + sizeof (SPACES) - 1 - (2 * depth), type);
3606 else if (c.data[0] == 2)
3612 case MATROSKA_STEREO_MODE:
3613 ++info->video_stereo;
3615 case MATROSKA_CLUSTER:
3616 GST_WARNING ("cluster, bailing out (should've found tracks by now)");
3621 data_scan_ctx_advance (tf, &c, element_size);
3622 chunk_size -= element_size;
3629 static GstStaticCaps matroska_caps = GST_STATIC_CAPS ("video/x-matroska");
3631 #define MATROSKA_CAPS (gst_static_caps_get(&matroska_caps))
3633 matroska_type_find (GstTypeFind * tf, gpointer ununsed)
3635 GstTypeFindProbability prob;
3636 GstMatroskaInfo info = { 0, };
3637 const gchar *type_name;
3638 DataScanCtx c = { 0, NULL, 0 };
3641 guint32 id, hdr_len;
3643 if (!data_scan_ctx_ensure_data (tf, &c, 64))
3646 if (GST_READ_UINT32_BE (c.data) != EBML_HEADER)
3649 while (c.offset < EBML_MAX_LEN && data_scan_ctx_ensure_data (tf, &c, 64)) {
3650 hdr_len = ebml_read_chunk_header (tf, &c, c.size, &id, &size);
3654 GST_INFO ("=== top-level chunk %08x, size %" G_GUINT64_FORMAT
3655 " / %" G_GUINT64_FORMAT, id, size, size + hdr_len);
3657 if (!ebml_parse_chunk (tf, &c, id, size, &info, 0))
3659 data_scan_ctx_advance (tf, &c, size);
3660 GST_INFO ("=== done with chunk %08x", id);
3661 if (id == MATROSKA_SEGMENT)
3665 GST_INFO ("audio=%u video=%u other=%u chunks=%u doctype=%d all_tracks=%d",
3666 info.audio, info.video, info.other, info.chunks, info.doctype,
3669 /* perhaps we should bail out if tracks_ok is FALSE and wait for more data?
3670 * (we would need new API to signal this properly and prevent other
3671 * typefinders from taking over the decision then) */
3672 is_audio = (info.audio > 0 && info.video == 0 && info.other == 0);
3674 if (info.doctype == EBML_DOCTYPE_WEBM) {
3675 type_name = (is_audio) ? "audio/webm" : "video/webm";
3676 } else if (info.video > 0 && info.video_stereo) {
3677 type_name = "video/x-matroska-3d";
3679 type_name = (is_audio) ? "audio/x-matroska" : "video/x-matroska";
3682 if (info.doctype == EBML_DOCTYPE_UNKNOWN)
3683 prob = GST_TYPE_FIND_LIKELY;
3685 prob = GST_TYPE_FIND_MAXIMUM;
3687 gst_type_find_suggest_simple (tf, prob, type_name, NULL);
3690 /*** application/mxf ***/
3691 static GstStaticCaps mxf_caps = GST_STATIC_CAPS ("application/mxf");
3693 #define MXF_MAX_PROBE_LENGTH (1024 * 64)
3694 #define MXF_CAPS (gst_static_caps_get(&mxf_caps))
3697 * MXF files start with a header partition pack key of 16 bytes which is defined
3698 * at SMPTE-377M 6.1. Before this there can be up to 64K of run-in which _must_
3699 * not contain the partition pack key.
3702 mxf_type_find (GstTypeFind * tf, gpointer ununsed)
3704 static const guint8 partition_pack_key[] =
3705 { 0x06, 0x0e, 0x2b, 0x34, 0x02, 0x05, 0x01, 0x01, 0x0d, 0x01, 0x02, 0x01,
3708 DataScanCtx c = { 0, NULL, 0 };
3710 while (c.offset <= MXF_MAX_PROBE_LENGTH) {
3712 if (G_UNLIKELY (!data_scan_ctx_ensure_data (tf, &c, 1024)))
3715 /* look over in chunks of 1kbytes to avoid too much overhead */
3717 for (i = 0; i < 1024 - 16; i++) {
3718 /* Check first byte before calling more expensive memcmp function */
3719 if (G_UNLIKELY (c.data[i] == 0x06
3720 && memcmp (c.data + i, partition_pack_key, 13) == 0)) {
3721 /* Header partition pack? */
3722 if (c.data[i + 13] != 0x02)
3725 /* Partition status */
3726 if (c.data[i + 14] >= 0x05)
3729 /* Reserved, must be 0x00 */
3730 if (c.data[i + 15] != 0x00)
3733 gst_type_find_suggest (tf, GST_TYPE_FIND_MAXIMUM, MXF_CAPS);
3739 data_scan_ctx_advance (tf, &c, 1024 - 16);
3743 /*** video/x-dv ***/
3745 static GstStaticCaps dv_caps = GST_STATIC_CAPS ("video/x-dv, "
3746 "systemstream = (boolean) true");
3747 #define DV_CAPS (gst_static_caps_get(&dv_caps))
3749 dv_type_find (GstTypeFind * tf, gpointer private)
3753 data = gst_type_find_peek (tf, 0, 5);
3755 /* check for DIF and DV flag */
3756 if (data && (data[0] == 0x1f) && (data[1] == 0x07) && (data[2] == 0x00)) {
3757 const gchar *format;
3759 if (data[3] & 0x80) {
3765 gst_type_find_suggest_simple (tf, GST_TYPE_FIND_MAXIMUM, "video/x-dv",
3766 "systemstream", G_TYPE_BOOLEAN, TRUE,
3767 "format", G_TYPE_STRING, format, NULL);
3772 /*** Ogg variants ***/
3773 static GstStaticCaps ogg_caps =
3774 GST_STATIC_CAPS ("application/ogg;video/ogg;audio/ogg;application/kate");
3776 #define OGG_CAPS (gst_static_caps_get(&ogg_caps))
3790 ogganx_type_find (GstTypeFind * tf, gpointer private)
3792 const gchar *media_type;
3793 DataScanCtx c = { 0, NULL, 0 };
3794 guint ogg_syncs = 0;
3795 guint hdr_count[OGG_NUM] = { 0, };
3798 const gchar marker[10];
3800 GstOggStreamType stream_type;
3803 "\001vorbis", 7, OGG_AUDIO}, {
3804 "\200theora", 7, OGG_VIDEO}, {
3805 "fLaC", 4, OGG_AUDIO}, {
3806 "\177FLAC", 5, OGG_AUDIO}, {
3807 "Speex", 5, OGG_AUDIO}, {
3808 "CMML\0\0\0\0", 8, OGG_OTHER}, {
3809 "PCM ", 8, OGG_AUDIO}, {
3810 "Annodex", 7, OGG_ANNODEX}, {
3811 "fishead", 7, OGG_SKELETON}, {
3812 "AnxData", 7, OGG_ANNODEX}, {
3813 "CELT ", 8, OGG_AUDIO}, {
3814 "\200kate\0\0\0", 8, OGG_KATE}, {
3815 "BBCD\0", 5, OGG_VIDEO}, {
3816 "OVP80\1\1", 7, OGG_VIDEO}, {
3817 "OpusHead", 8, OGG_AUDIO}, {
3818 "\001audio\0\0\0", 9, OGG_AUDIO}, {
3819 "\001video\0\0\0", 9, OGG_VIDEO}, {
3820 "\001text\0\0\0", 9, OGG_OTHER}
3823 while (c.offset < 4096 && data_scan_ctx_ensure_data (tf, &c, 64)) {
3826 if (memcmp (c.data, "OggS", 5) != 0)
3832 if (c.data[5] != 0x02)
3835 /* headers should only have one segment */
3836 if (c.data[26] != 1)
3843 data_scan_ctx_advance (tf, &c, 28);
3845 if (!data_scan_ctx_ensure_data (tf, &c, MAX (size, 8)))
3848 for (i = 0; i < G_N_ELEMENTS (markers); ++i) {
3849 if (memcmp (c.data, markers[i].marker, markers[i].marker_size) == 0) {
3850 ++hdr_count[markers[i].stream_type];
3855 if (i == G_N_ELEMENTS (markers)) {
3856 GST_MEMDUMP ("unknown Ogg stream marker", c.data, size);
3857 ++hdr_count[OGG_OTHER];
3860 data_scan_ctx_advance (tf, &c, size);
3866 /* We don't bother with annodex types. FIXME: what about XSPF? */
3867 if (hdr_count[OGG_VIDEO] > 0) {
3868 media_type = "video/ogg";
3869 } else if (hdr_count[OGG_AUDIO] > 0) {
3870 media_type = "audio/ogg";
3871 } else if (hdr_count[OGG_KATE] > 0 && hdr_count[OGG_OTHER] == 0) {
3872 media_type = "application/kate";
3874 media_type = "application/ogg";
3877 GST_INFO ("found %s (audio:%u, video:%u, annodex:%u, skeleton:%u, other:%u)",
3878 media_type, hdr_count[OGG_AUDIO], hdr_count[OGG_VIDEO],
3879 hdr_count[OGG_ANNODEX], hdr_count[OGG_SKELETON], hdr_count[OGG_OTHER]);
3881 gst_type_find_suggest_simple (tf, GST_TYPE_FIND_MAXIMUM, media_type, NULL);
3884 /*** audio/x-vorbis ***/
3885 static GstStaticCaps vorbis_caps = GST_STATIC_CAPS ("audio/x-vorbis");
3887 #define VORBIS_CAPS (gst_static_caps_get(&vorbis_caps))
3889 vorbis_type_find (GstTypeFind * tf, gpointer private)
3891 const guint8 *data = gst_type_find_peek (tf, 0, 30);
3897 /* 1 byte packet type (identification=0x01)
3898 6 byte string "vorbis"
3899 4 byte vorbis version */
3900 if (memcmp (data, "\001vorbis\000\000\000\000", 11) != 0)
3903 /* 1 byte channels must be != 0 */
3907 /* 4 byte samplerate must be != 0 */
3908 if (GST_READ_UINT32_LE (data) == 0)
3911 /* blocksize checks */
3912 blocksize_0 = data[0] & 0x0F;
3913 blocksize_1 = (data[0] & 0xF0) >> 4;
3914 if (blocksize_0 > blocksize_1)
3916 if (blocksize_0 < 6 || blocksize_0 > 13)
3918 if (blocksize_1 < 6 || blocksize_1 > 13)
3922 if ((data[0] & 0x01) != 1)
3924 gst_type_find_suggest (tf, GST_TYPE_FIND_MAXIMUM, VORBIS_CAPS);
3928 /*** video/x-theora ***/
3930 static GstStaticCaps theora_caps = GST_STATIC_CAPS ("video/x-theora");
3932 #define THEORA_CAPS (gst_static_caps_get(&theora_caps))
3934 theora_type_find (GstTypeFind * tf, gpointer private)
3936 const guint8 *data = gst_type_find_peek (tf, 0, 7); //42);
3939 if (data[0] != 0x80)
3941 if (memcmp (&data[1], "theora", 6) != 0)
3943 /* FIXME: make this more reliable when specs are out */
3945 gst_type_find_suggest (tf, GST_TYPE_FIND_MAXIMUM, THEORA_CAPS);
3951 kate_type_find (GstTypeFind * tf, gpointer private)
3953 const guint8 *data = gst_type_find_peek (tf, 0, 64);
3954 gchar category[16] = { 0, };
3956 if (G_UNLIKELY (data == NULL))
3959 /* see: http://wiki.xiph.org/index.php/OggKate#Format_specification */
3960 if (G_LIKELY (memcmp (data, "\200kate\0\0\0", 8) != 0))
3963 /* make sure we always have a NUL-terminated string */
3964 memcpy (category, data + 48, 15);
3965 GST_LOG ("kate category: %s", category);
3966 /* canonical categories for subtitles: subtitles, spu-subtitles, SUB, K-SPU */
3967 if (strcmp (category, "subtitles") == 0 || strcmp (category, "SUB") == 0 ||
3968 strcmp (category, "spu-subtitles") == 0 ||
3969 strcmp (category, "K-SPU") == 0) {
3970 gst_type_find_suggest_simple (tf, GST_TYPE_FIND_MAXIMUM,
3971 "subtitle/x-kate", NULL);
3973 gst_type_find_suggest_simple (tf, GST_TYPE_FIND_MAXIMUM,
3974 "application/x-kate", NULL);
3978 /*** application/x-ogm-video or audio***/
3980 static GstStaticCaps ogmvideo_caps =
3981 GST_STATIC_CAPS ("application/x-ogm-video");
3982 #define OGMVIDEO_CAPS (gst_static_caps_get(&ogmvideo_caps))
3984 ogmvideo_type_find (GstTypeFind * tf, gpointer private)
3986 const guint8 *data = gst_type_find_peek (tf, 0, 9);
3989 if (memcmp (data, "\001video\000\000\000", 9) != 0)
3991 gst_type_find_suggest (tf, GST_TYPE_FIND_MAXIMUM, OGMVIDEO_CAPS);
3995 static GstStaticCaps ogmaudio_caps =
3996 GST_STATIC_CAPS ("application/x-ogm-audio");
3997 #define OGMAUDIO_CAPS (gst_static_caps_get(&ogmaudio_caps))
3999 ogmaudio_type_find (GstTypeFind * tf, gpointer private)
4001 const guint8 *data = gst_type_find_peek (tf, 0, 9);
4004 if (memcmp (data, "\001audio\000\000\000", 9) != 0)
4006 gst_type_find_suggest (tf, GST_TYPE_FIND_MAXIMUM, OGMAUDIO_CAPS);
4010 static GstStaticCaps ogmtext_caps = GST_STATIC_CAPS ("application/x-ogm-text");
4012 #define OGMTEXT_CAPS (gst_static_caps_get(&ogmtext_caps))
4014 ogmtext_type_find (GstTypeFind * tf, gpointer private)
4016 const guint8 *data = gst_type_find_peek (tf, 0, 9);
4019 if (memcmp (data, "\001text\000\000\000\000", 9) != 0)
4021 gst_type_find_suggest (tf, GST_TYPE_FIND_MAXIMUM, OGMTEXT_CAPS);
4025 /*** audio/x-speex ***/
4027 static GstStaticCaps speex_caps = GST_STATIC_CAPS ("audio/x-speex");
4029 #define SPEEX_CAPS (gst_static_caps_get(&speex_caps))
4031 speex_type_find (GstTypeFind * tf, gpointer private)
4033 const guint8 *data = gst_type_find_peek (tf, 0, 80);
4036 /* 8 byte string "Speex "
4037 24 byte speex version string + int */
4038 if (memcmp (data, "Speex ", 8) != 0)
4042 /* 4 byte header size >= 80 */
4043 if (GST_READ_UINT32_LE (data) < 80)
4047 /* 4 byte sample rate <= 48000 */
4048 if (GST_READ_UINT32_LE (data) > 48000)
4052 /* currently there are only 3 speex modes. */
4053 if (GST_READ_UINT32_LE (data) > 3)
4057 gst_type_find_suggest (tf, GST_TYPE_FIND_MAXIMUM, SPEEX_CAPS);
4061 /*** audio/x-celt ***/
4063 static GstStaticCaps celt_caps = GST_STATIC_CAPS ("audio/x-celt");
4065 #define CELT_CAPS (gst_static_caps_get(&celt_caps))
4067 celt_type_find (GstTypeFind * tf, gpointer private)
4069 const guint8 *data = gst_type_find_peek (tf, 0, 8);
4072 /* 8 byte string "CELT " */
4073 if (memcmp (data, "CELT ", 8) != 0)
4076 /* TODO: Check other values of the CELT header */
4077 gst_type_find_suggest (tf, GST_TYPE_FIND_MAXIMUM, CELT_CAPS);
4081 /*** application/x-ogg-skeleton ***/
4082 static GstStaticCaps ogg_skeleton_caps =
4083 GST_STATIC_CAPS ("application/x-ogg-skeleton, parsed=(boolean)FALSE");
4084 #define OGG_SKELETON_CAPS (gst_static_caps_get(&ogg_skeleton_caps))
4086 oggskel_type_find (GstTypeFind * tf, gpointer private)
4088 const guint8 *data = gst_type_find_peek (tf, 0, 12);
4091 /* 8 byte string "fishead\0" for the ogg skeleton stream */
4092 if (memcmp (data, "fishead\0", 8) != 0)
4096 /* Require that the header contains version 3.0 */
4097 if (GST_READ_UINT16_LE (data) != 3)
4100 if (GST_READ_UINT16_LE (data) != 0)
4103 gst_type_find_suggest (tf, GST_TYPE_FIND_MAXIMUM, OGG_SKELETON_CAPS);
4107 static GstStaticCaps cmml_caps = GST_STATIC_CAPS ("text/x-cmml");
4109 #define CMML_CAPS (gst_static_caps_get(&cmml_caps))
4111 cmml_type_find (GstTypeFind * tf, gpointer private)
4113 /* Header is 12 bytes minimum (though we don't check the minor version */
4114 const guint8 *data = gst_type_find_peek (tf, 0, 12);
4118 /* 8 byte string "CMML\0\0\0\0" for the magic number */
4119 if (memcmp (data, "CMML\0\0\0\0", 8) != 0)
4123 /* Require that the header contains at least version 2.0 */
4124 if (GST_READ_UINT16_LE (data) < 2)
4127 gst_type_find_suggest (tf, GST_TYPE_FIND_MAXIMUM, CMML_CAPS);
4131 /*** application/x-tar ***/
4133 static GstStaticCaps tar_caps = GST_STATIC_CAPS ("application/x-tar");
4135 #define TAR_CAPS (gst_static_caps_get(&tar_caps))
4136 #define OLDGNU_MAGIC "ustar " /* 7 chars and a NUL */
4137 #define NEWGNU_MAGIC "ustar" /* 5 chars and a NUL */
4139 tar_type_find (GstTypeFind * tf, gpointer unused)
4141 const guint8 *data = gst_type_find_peek (tf, 257, 8);
4143 /* of course we are not certain, but we don't want other typefind funcs
4144 * to detect formats of files within the tar archive, e.g. mp3s */
4146 if (memcmp (data, OLDGNU_MAGIC, 8) == 0) { /* sic */
4147 gst_type_find_suggest (tf, GST_TYPE_FIND_NEARLY_CERTAIN, TAR_CAPS);
4148 } else if (memcmp (data, NEWGNU_MAGIC, 6) == 0 && /* sic */
4149 g_ascii_isdigit (data[6]) && g_ascii_isdigit (data[7])) {
4150 gst_type_find_suggest (tf, GST_TYPE_FIND_NEARLY_CERTAIN, TAR_CAPS);
4155 /*** application/x-ar ***/
4157 static GstStaticCaps ar_caps = GST_STATIC_CAPS ("application/x-ar");
4159 #define AR_CAPS (gst_static_caps_get(&ar_caps))
4161 ar_type_find (GstTypeFind * tf, gpointer unused)
4163 const guint8 *data = gst_type_find_peek (tf, 0, 24);
4165 if (data && memcmp (data, "!<arch>", 7) == 0) {
4168 for (i = 7; i < 24; ++i) {
4169 if (!g_ascii_isprint (data[i]) && data[i] != '\n') {
4170 gst_type_find_suggest (tf, GST_TYPE_FIND_POSSIBLE, AR_CAPS);
4174 gst_type_find_suggest (tf, GST_TYPE_FIND_NEARLY_CERTAIN, AR_CAPS);
4178 /*** audio/x-au ***/
4180 /* NOTE: we cannot replace this function with TYPE_FIND_REGISTER_START_WITH,
4181 * as it is only possible to register one typefind factory per 'name'
4182 * (which is in this case the caps), and the first one would be replaced by
4183 * the second one. */
4184 static GstStaticCaps au_caps = GST_STATIC_CAPS ("audio/x-au");
4186 #define AU_CAPS (gst_static_caps_get(&au_caps))
4188 au_type_find (GstTypeFind * tf, gpointer unused)
4190 const guint8 *data = gst_type_find_peek (tf, 0, 4);
4193 if (memcmp (data, ".snd", 4) == 0 || memcmp (data, "dns.", 4) == 0) {
4194 gst_type_find_suggest (tf, GST_TYPE_FIND_MAXIMUM, AU_CAPS);
4200 /*** video/x-nuv ***/
4202 /* NOTE: we cannot replace this function with TYPE_FIND_REGISTER_START_WITH,
4203 * as it is only possible to register one typefind factory per 'name'
4204 * (which is in this case the caps), and the first one would be replaced by
4205 * the second one. */
4206 static GstStaticCaps nuv_caps = GST_STATIC_CAPS ("video/x-nuv");
4208 #define NUV_CAPS (gst_static_caps_get(&nuv_caps))
4210 nuv_type_find (GstTypeFind * tf, gpointer unused)
4212 const guint8 *data = gst_type_find_peek (tf, 0, 11);
4215 if (memcmp (data, "MythTVVideo", 11) == 0
4216 || memcmp (data, "NuppelVideo", 11) == 0) {
4217 gst_type_find_suggest (tf, GST_TYPE_FIND_MAXIMUM, NUV_CAPS);
4222 /*** audio/x-paris ***/
4223 /* NOTE: do not replace this function with two TYPE_FIND_REGISTER_START_WITH */
4224 static GstStaticCaps paris_caps = GST_STATIC_CAPS ("audio/x-paris");
4226 #define PARIS_CAPS (gst_static_caps_get(&paris_caps))
4228 paris_type_find (GstTypeFind * tf, gpointer unused)
4230 const guint8 *data = gst_type_find_peek (tf, 0, 4);
4233 if (memcmp (data, " paf", 4) == 0 || memcmp (data, "fap ", 4) == 0) {
4234 gst_type_find_suggest (tf, GST_TYPE_FIND_MAXIMUM, PARIS_CAPS);
4239 /*** audio/iLBC-sh ***/
4240 /* NOTE: do not replace this function with two TYPE_FIND_REGISTER_START_WITH */
4241 static GstStaticCaps ilbc_caps = GST_STATIC_CAPS ("audio/iLBC-sh");
4243 #define ILBC_CAPS (gst_static_caps_get(&ilbc_caps))
4245 ilbc_type_find (GstTypeFind * tf, gpointer unused)
4247 const guint8 *data = gst_type_find_peek (tf, 0, 8);
4250 if (memcmp (data, "#!iLBC30", 8) == 0 || memcmp (data, "#!iLBC20", 8) == 0) {
4251 gst_type_find_suggest (tf, GST_TYPE_FIND_LIKELY, ILBC_CAPS);
4256 /*** application/x-ms-dos-executable ***/
4258 static GstStaticCaps msdos_caps =
4259 GST_STATIC_CAPS ("application/x-ms-dos-executable");
4260 #define MSDOS_CAPS (gst_static_caps_get(&msdos_caps))
4261 /* see http://www.madchat.org/vxdevl/papers/winsys/pefile/pefile.htm */
4263 msdos_type_find (GstTypeFind * tf, gpointer unused)
4265 const guint8 *data = gst_type_find_peek (tf, 0, 64);
4267 if (data && data[0] == 'M' && data[1] == 'Z' &&
4268 GST_READ_UINT16_LE (data + 8) == 4) {
4269 guint32 pe_offset = GST_READ_UINT32_LE (data + 60);
4271 data = gst_type_find_peek (tf, pe_offset, 2);
4272 if (data && data[0] == 'P' && data[1] == 'E') {
4273 gst_type_find_suggest (tf, GST_TYPE_FIND_NEARLY_CERTAIN, MSDOS_CAPS);
4278 /*** application/x-mmsh ***/
4280 static GstStaticCaps mmsh_caps = GST_STATIC_CAPS ("application/x-mmsh");
4282 #define MMSH_CAPS gst_static_caps_get(&mmsh_caps)
4284 /* This is to recognise mssh-over-http */
4286 mmsh_type_find (GstTypeFind * tf, gpointer unused)
4288 static const guint8 asf_marker[16] = { 0x30, 0x26, 0xb2, 0x75, 0x8e, 0x66,
4289 0xcf, 0x11, 0xa6, 0xd9, 0x00, 0xaa, 0x00, 0x62, 0xce, 0x6c
4294 data = gst_type_find_peek (tf, 0, 2 + 2 + 4 + 2 + 2 + 16);
4295 if (data && data[0] == 0x24 && data[1] == 0x48 &&
4296 GST_READ_UINT16_LE (data + 2) > 2 + 2 + 4 + 2 + 2 + 16 &&
4297 memcmp (data + 2 + 2 + 4 + 2 + 2, asf_marker, 16) == 0) {
4298 gst_type_find_suggest (tf, GST_TYPE_FIND_LIKELY, MMSH_CAPS);
4302 /*** video/x-dirac ***/
4304 /* NOTE: we cannot replace this function with TYPE_FIND_REGISTER_START_WITH,
4305 * as it is only possible to register one typefind factory per 'name'
4306 * (which is in this case the caps), and the first one would be replaced by
4307 * the second one. */
4308 static GstStaticCaps dirac_caps = GST_STATIC_CAPS ("video/x-dirac");
4310 #define DIRAC_CAPS (gst_static_caps_get(&dirac_caps))
4312 dirac_type_find (GstTypeFind * tf, gpointer unused)
4314 const guint8 *data = gst_type_find_peek (tf, 0, 8);
4317 if (memcmp (data, "BBCD", 4) == 0 || memcmp (data, "KW-DIRAC", 8) == 0) {
4318 gst_type_find_suggest (tf, GST_TYPE_FIND_MAXIMUM, DIRAC_CAPS);
4323 /*** video/vivo ***/
4325 static GstStaticCaps vivo_caps = GST_STATIC_CAPS ("video/vivo");
4327 #define VIVO_CAPS gst_static_caps_get(&vivo_caps)
4330 vivo_type_find (GstTypeFind * tf, gpointer unused)
4332 static const guint8 vivo_marker[] = { 'V', 'e', 'r', 's', 'i', 'o', 'n',
4333 ':', 'V', 'i', 'v', 'o', '/'
4338 data = gst_type_find_peek (tf, 0, 1024);
4339 if (data == NULL || data[0] != 0x00)
4342 if ((data[1] & 0x80)) {
4343 if ((data[2] & 0x80))
4345 hdr_len = ((guint) (data[1] & 0x7f)) << 7;
4355 /* 1008 = 1022 - strlen ("Version:Vivo/") - 1 */
4356 while (pos < 1008 && data[pos] == '\r' && data[pos + 1] == '\n')
4359 if (memcmp (data + pos, vivo_marker, sizeof (vivo_marker)) == 0) {
4360 gst_type_find_suggest (tf, GST_TYPE_FIND_MAXIMUM, VIVO_CAPS);
4364 /*** XDG MIME typefinder (to avoid false positives mostly) ***/
4368 xdgmime_typefind (GstTypeFind * find, gpointer user_data)
4371 gsize length = 16384;
4376 if ((tf_length = gst_type_find_get_length (find)) > 0)
4377 length = MIN (length, tf_length);
4379 if ((data = gst_type_find_peek (find, 0, length)) == NULL)
4382 tmp = g_content_type_guess (NULL, data, length, NULL);
4383 if (tmp == NULL || g_content_type_is_unknown (tmp)) {
4388 mimetype = g_content_type_get_mime_type (tmp);
4391 if (mimetype == NULL)
4394 GST_DEBUG ("Got mimetype '%s'", mimetype);
4396 /* Ignore audio/video types:
4397 * - our own typefinders in -base are likely to be better at this
4398 * (and if they're not, we really want to fix them, that's why we don't
4399 * report xdg-detected audio/video types at all, not even with a low
4401 * - we want to detect GStreamer media types and not MIME types
4402 * - the purpose of this xdg mime finder is mainly to prevent false
4403 * positives of non-media formats, not to typefind audio/video formats */
4404 if (g_str_has_prefix (mimetype, "audio/") ||
4405 g_str_has_prefix (mimetype, "video/")) {
4406 GST_LOG ("Ignoring audio/video mime type");
4411 /* Again, we mainly want the xdg typefinding to prevent false-positives on
4412 * non-media formats, so suggest the type with a probability that trumps
4413 * uncertain results of our typefinders, but not more than that. */
4414 GST_LOG ("Suggesting '%s' with probability POSSIBLE", mimetype);
4415 gst_type_find_suggest_simple (find, GST_TYPE_FIND_POSSIBLE, mimetype, NULL);
4418 #endif /* USE_GIO */
4420 /*** Windows icon typefinder (to avoid false positives mostly) ***/
4423 windows_icon_typefind (GstTypeFind * find, gpointer user_data)
4427 guint16 type, nimages;
4428 gint32 size, offset;
4430 datalen = gst_type_find_get_length (find);
4431 if ((data = gst_type_find_peek (find, 0, 6)) == NULL)
4434 /* header - simple and not enough to rely on it alone */
4435 if (GST_READ_UINT16_LE (data) != 0)
4437 type = GST_READ_UINT16_LE (data + 2);
4438 if (type != 1 && type != 2)
4440 nimages = GST_READ_UINT16_LE (data + 4);
4441 if (nimages == 0) /* we can assume we can't have an empty image file ? */
4445 if (data[6 + 3] != 0)
4448 guint16 planes = GST_READ_UINT16_LE (data + 6 + 4);
4452 size = GST_READ_UINT32_LE (data + 6 + 8);
4453 offset = GST_READ_UINT32_LE (data + 6 + 12);
4454 if (offset < 0 || size <= 0 || size >= datalen || offset >= datalen
4455 || size + offset > datalen)
4458 gst_type_find_suggest_simple (find, GST_TYPE_FIND_NEARLY_CERTAIN,
4459 "image/x-icon", NULL);
4462 /*** WAP WBMP typefinder ***/
4465 wbmp_typefind (GstTypeFind * find, gpointer user_data)
4471 /* http://en.wikipedia.org/wiki/Wireless_Application_Protocol_Bitmap_Format */
4472 datalen = gst_type_find_get_length (find);
4476 data = gst_type_find_peek (find, 0, 5);
4480 /* want 0x00 0x00 at start */
4481 if (*data++ != 0 || *data++ != 0)
4484 /* min header size */
4487 /* let's assume max width/height is 65536 */
4490 w = (w << 8) | *data++;
4494 data = gst_type_find_peek (find, 4, 2);
4500 h = (h << 8) | *data++;
4506 if (w == 0 || h == 0)
4509 /* now add bitmap size */
4510 size += h * (GST_ROUND_UP_8 (w) / 8);
4512 if (datalen == size) {
4513 gst_type_find_suggest_simple (find, GST_TYPE_FIND_POSSIBLE - 10,
4514 "image/vnd.wap.wbmp", NULL);
4518 /*** DEGAS Atari images (also to avoid false positives, see #625129) ***/
4520 degas_type_find (GstTypeFind * tf, gpointer private)
4522 /* No magic, but it should have a fixed size and a few invalid values */
4523 /* http://www.fileformat.info/format/atari/spec/6ecf9f6eb5be494284a47feb8a214687/view.htm */
4529 len = gst_type_find_get_length (tf);
4530 if (len < 34) /* smallest header of the lot */
4532 data = gst_type_find_peek (tf, 0, 4);
4533 if (G_UNLIKELY (data == NULL))
4535 resolution = GST_READ_UINT16_BE (data);
4537 /* could be DEGAS */
4538 if (resolution <= 2)
4539 gst_type_find_suggest_simple (tf, GST_TYPE_FIND_POSSIBLE + 5,
4540 "image/x-degas", NULL);
4541 } else if (len == 32066) {
4542 /* could be DEGAS Elite */
4543 if (resolution <= 2) {
4544 data = gst_type_find_peek (tf, len - 16, 8);
4545 if (G_UNLIKELY (data == NULL))
4547 for (n = 0; n < 4; n++) {
4548 if (GST_READ_UINT16_BE (data + n * 2) > 2)
4551 gst_type_find_suggest_simple (tf, GST_TYPE_FIND_POSSIBLE + 5,
4552 "image/x-degas", NULL);
4554 } else if (len >= 66 && len < 32066) {
4555 /* could be compressed DEGAS Elite, but it's compressed and so we can't rely on size,
4556 it does have 4 16 bytes values near the end that are 0-2 though. */
4557 if ((resolution & 0x8000) && (resolution & 0x7fff) <= 2) {
4558 data = gst_type_find_peek (tf, len - 16, 8);
4559 if (G_UNLIKELY (data == NULL))
4561 for (n = 0; n < 4; n++) {
4562 if (GST_READ_UINT16_BE (data + n * 2) > 2)
4565 gst_type_find_suggest_simple (tf, GST_TYPE_FIND_POSSIBLE + 5,
4566 "image/x-degas", NULL);
4571 /*** DVD ISO images (looks like H.264, see #674069) ***/
4573 dvdiso_type_find (GstTypeFind * tf, gpointer private)
4575 /* 0x8000 bytes of zeros, then "\001CD001" */
4579 len = gst_type_find_get_length (tf);
4582 data = gst_type_find_peek (tf, 0, 0x8006);
4583 if (G_UNLIKELY (data == NULL))
4585 for (len = 0; len < 0x8000; len++)
4588 /* Can the '1' be anything else ? My three samples all have '1'. */
4589 if (memcmp (data + 0x8000, "\001CD001", 6))
4592 /* May need more inspection, we may be able to demux some of them */
4593 gst_type_find_suggest_simple (tf, GST_TYPE_FIND_LIKELY,
4594 "application/octet-stream", NULL);
4597 /*** generic typefind for streams that have some data at a specific position***/
4608 start_with_type_find (GstTypeFind * tf, gpointer private)
4610 GstTypeFindData *start_with = (GstTypeFindData *) private;
4613 GST_LOG ("trying to find mime type %s with the first %u bytes of data",
4614 gst_structure_get_name (gst_caps_get_structure (start_with->caps, 0)),
4616 data = gst_type_find_peek (tf, 0, start_with->size);
4617 if (data && memcmp (data, start_with->data, start_with->size) == 0) {
4618 gst_type_find_suggest (tf, start_with->probability, start_with->caps);
4623 sw_data_destroy (GstTypeFindData * sw_data)
4625 if (G_LIKELY (sw_data->caps != NULL))
4626 gst_caps_unref (sw_data->caps);
4630 #define TYPE_FIND_REGISTER_START_WITH(plugin,name,rank,ext,_data,_size,_probability)\
4632 GstTypeFindData *sw_data = g_new (GstTypeFindData, 1); \
4633 sw_data->data = (const guint8 *)_data; \
4634 sw_data->size = _size; \
4635 sw_data->probability = _probability; \
4636 sw_data->caps = gst_caps_new_empty_simple (name); \
4637 if (!gst_type_find_register (plugin, name, rank, start_with_type_find,\
4638 ext, sw_data->caps, sw_data, \
4639 (GDestroyNotify) (sw_data_destroy))) { \
4640 gst_caps_unref (sw_data->caps); \
4645 /*** same for riff types ***/
4648 riff_type_find (GstTypeFind * tf, gpointer private)
4650 GstTypeFindData *riff_data = (GstTypeFindData *) private;
4651 const guint8 *data = gst_type_find_peek (tf, 0, 12);
4653 if (data && (memcmp (data, "RIFF", 4) == 0 || memcmp (data, "AVF0", 4) == 0)) {
4655 if (memcmp (data, riff_data->data, 4) == 0)
4656 gst_type_find_suggest (tf, riff_data->probability, riff_data->caps);
4660 #define TYPE_FIND_REGISTER_RIFF(plugin,name,rank,ext,_data) \
4662 GstTypeFindData *sw_data = g_new (GstTypeFindData, 1); \
4663 sw_data->data = (gpointer)_data; \
4664 sw_data->size = 4; \
4665 sw_data->probability = GST_TYPE_FIND_MAXIMUM; \
4666 sw_data->caps = gst_caps_new_empty_simple (name); \
4667 if (!gst_type_find_register (plugin, name, rank, riff_type_find, \
4668 ext, sw_data->caps, sw_data, \
4669 (GDestroyNotify) (sw_data_destroy))) { \
4670 gst_caps_unref (sw_data->caps); \
4676 /*** plugin initialization ***/
4678 #define TYPE_FIND_REGISTER(plugin,name,rank,func,ext,caps,priv,notify) \
4680 if (!gst_type_find_register (plugin, name, rank, func, ext, caps, priv, notify))\
4686 plugin_init (GstPlugin * plugin)
4688 /* can't initialize this via a struct as caps can't be statically initialized */
4690 GST_DEBUG_CATEGORY_INIT (type_find_debug, "typefindfunctions",
4691 GST_DEBUG_FG_GREEN | GST_DEBUG_BG_RED, "generic type find functions");
4693 /* note: asx/wax/wmx are XML files, asf doesn't handle them */
4694 /* must use strings, macros don't accept initializers */
4695 TYPE_FIND_REGISTER_START_WITH (plugin, "video/x-ms-asf", GST_RANK_SECONDARY,
4697 "\060\046\262\165\216\146\317\021\246\331\000\252\000\142\316\154", 16,
4698 GST_TYPE_FIND_MAXIMUM);
4699 TYPE_FIND_REGISTER (plugin, "audio/x-musepack", GST_RANK_PRIMARY,
4700 musepack_type_find, "mpc,mpp,mp+", MUSEPACK_CAPS, NULL, NULL);
4701 TYPE_FIND_REGISTER (plugin, "audio/x-au", GST_RANK_MARGINAL,
4702 au_type_find, "au,snd", AU_CAPS, NULL, NULL);
4703 TYPE_FIND_REGISTER_RIFF (plugin, "video/x-msvideo", GST_RANK_PRIMARY,
4705 TYPE_FIND_REGISTER_RIFF (plugin, "audio/qcelp", GST_RANK_PRIMARY,
4707 TYPE_FIND_REGISTER_RIFF (plugin, "video/x-cdxa", GST_RANK_PRIMARY,
4709 TYPE_FIND_REGISTER_START_WITH (plugin, "video/x-vcd", GST_RANK_PRIMARY,
4710 "dat", "\000\377\377\377\377\377\377\377\377\377\377\000", 12,
4711 GST_TYPE_FIND_MAXIMUM);
4712 TYPE_FIND_REGISTER_START_WITH (plugin, "audio/x-imelody", GST_RANK_PRIMARY,
4713 "imy,ime,imelody", "BEGIN:IMELODY", 13, GST_TYPE_FIND_MAXIMUM);
4715 TYPE_FIND_REGISTER_START_WITH (plugin, "video/x-smoke", GST_RANK_PRIMARY,
4716 NULL, "\x80smoke\x00\x01\x00", 6, GST_TYPE_FIND_MAXIMUM);
4718 TYPE_FIND_REGISTER (plugin, "audio/midi", GST_RANK_PRIMARY, mid_type_find,
4719 "mid,midi", MID_CAPS, NULL, NULL);
4720 TYPE_FIND_REGISTER_RIFF (plugin, "audio/riff-midi", GST_RANK_PRIMARY,
4721 "mid,midi", "RMID");
4722 TYPE_FIND_REGISTER (plugin, "audio/mobile-xmf", GST_RANK_PRIMARY,
4723 mxmf_type_find, "mxmf", MXMF_CAPS, NULL, NULL);
4724 TYPE_FIND_REGISTER (plugin, "video/x-fli", GST_RANK_MARGINAL, flx_type_find,
4725 "flc,fli", FLX_CAPS, NULL, NULL);
4726 TYPE_FIND_REGISTER (plugin, "application/x-id3v2", GST_RANK_PRIMARY + 103,
4727 id3v2_type_find, "mp3,mp2,mp1,mpga,ogg,flac,tta", ID3_CAPS, NULL, NULL);
4728 TYPE_FIND_REGISTER (plugin, "application/x-id3v1", GST_RANK_PRIMARY + 101,
4729 id3v1_type_find, "mp3,mp2,mp1,mpga,ogg,flac,tta", ID3_CAPS, NULL, NULL);
4730 TYPE_FIND_REGISTER (plugin, "application/x-apetag", GST_RANK_PRIMARY + 102,
4731 apetag_type_find, "mp3,ape,mpc,wv", APETAG_CAPS, NULL, NULL);
4732 TYPE_FIND_REGISTER (plugin, "audio/x-ttafile", GST_RANK_PRIMARY,
4733 tta_type_find, "tta", TTA_CAPS, NULL, NULL);
4734 TYPE_FIND_REGISTER (plugin, "audio/x-mod", GST_RANK_SECONDARY, mod_type_find,
4735 "669,amf,dsm,gdm,far,imf,it,med,mod,mtm,okt,sam,s3m,stm,stx,ult,xm",
4736 MOD_CAPS, NULL, NULL);
4737 TYPE_FIND_REGISTER (plugin, "audio/mpeg", GST_RANK_PRIMARY, mp3_type_find,
4738 "mp3,mp2,mp1,mpga", MP3_CAPS, NULL, NULL);
4739 TYPE_FIND_REGISTER (plugin, "audio/x-ac3", GST_RANK_PRIMARY, ac3_type_find,
4740 "ac3,eac3", AC3_CAPS, NULL, NULL);
4741 TYPE_FIND_REGISTER (plugin, "audio/x-dts", GST_RANK_SECONDARY, dts_type_find,
4742 "dts", DTS_CAPS, NULL, NULL);
4743 TYPE_FIND_REGISTER (plugin, "audio/x-gsm", GST_RANK_PRIMARY, NULL, "gsm",
4744 GSM_CAPS, NULL, NULL);
4745 TYPE_FIND_REGISTER (plugin, "video/mpeg-sys", GST_RANK_PRIMARY,
4746 mpeg_sys_type_find, "mpe,mpeg,mpg", MPEG_SYS_CAPS, NULL, NULL);
4747 TYPE_FIND_REGISTER (plugin, "video/mpegts", GST_RANK_PRIMARY,
4748 mpeg_ts_type_find, "ts,mts", MPEGTS_CAPS, NULL, NULL);
4749 TYPE_FIND_REGISTER (plugin, "application/ogg", GST_RANK_PRIMARY,
4750 ogganx_type_find, "ogg,oga,ogv,ogm,ogx,spx,anx,axa,axv", OGG_CAPS,
4752 TYPE_FIND_REGISTER (plugin, "video/mpeg-elementary", GST_RANK_MARGINAL,
4753 mpeg_video_stream_type_find, "mpv,mpeg,mpg", MPEG_VIDEO_CAPS, NULL, NULL);
4754 TYPE_FIND_REGISTER (plugin, "video/mpeg4", GST_RANK_PRIMARY,
4755 mpeg4_video_type_find, "m4v", MPEG_VIDEO_CAPS, NULL, NULL);
4756 TYPE_FIND_REGISTER (plugin, "video/x-h263", GST_RANK_SECONDARY,
4757 h263_video_type_find, "h263,263", H263_VIDEO_CAPS, NULL, NULL);
4758 TYPE_FIND_REGISTER (plugin, "video/x-h264", GST_RANK_PRIMARY,
4759 h264_video_type_find, "h264,x264,264", H264_VIDEO_CAPS, NULL, NULL);
4760 TYPE_FIND_REGISTER (plugin, "video/x-nuv", GST_RANK_SECONDARY, nuv_type_find,
4761 "nuv", NUV_CAPS, NULL, NULL);
4764 TYPE_FIND_REGISTER (plugin, "audio/x-m4a", GST_RANK_PRIMARY, m4a_type_find,
4765 "m4a", M4A_CAPS, NULL, NULL);
4766 TYPE_FIND_REGISTER (plugin, "application/x-3gp", GST_RANK_PRIMARY,
4767 q3gp_type_find, "3gp", Q3GP_CAPS, NULL, NULL);
4768 TYPE_FIND_REGISTER (plugin, "video/quicktime", GST_RANK_SECONDARY,
4769 qt_type_find, "mov", QT_CAPS, NULL, NULL);
4770 TYPE_FIND_REGISTER (plugin, "image/x-quicktime", GST_RANK_SECONDARY,
4771 qtif_type_find, "qif,qtif,qti", QTIF_CAPS, NULL, NULL);
4772 TYPE_FIND_REGISTER (plugin, "image/jp2", GST_RANK_PRIMARY,
4773 jp2_type_find, "jp2", JP2_CAPS, NULL, NULL);
4774 TYPE_FIND_REGISTER (plugin, "video/mj2", GST_RANK_PRIMARY,
4775 jp2_type_find, "mj2", MJ2_CAPS, NULL, NULL);
4777 TYPE_FIND_REGISTER (plugin, "text/html", GST_RANK_SECONDARY, html_type_find,
4778 "htm,html", HTML_CAPS, NULL, NULL);
4779 TYPE_FIND_REGISTER_START_WITH (plugin, "application/vnd.rn-realmedia",
4780 GST_RANK_SECONDARY, "ra,ram,rm,rmvb", ".RMF", 4, GST_TYPE_FIND_MAXIMUM);
4781 TYPE_FIND_REGISTER_START_WITH (plugin, "application/x-pn-realaudio",
4782 GST_RANK_SECONDARY, "ra,ram,rm,rmvb", ".ra\375", 4,
4783 GST_TYPE_FIND_MAXIMUM);
4784 TYPE_FIND_REGISTER (plugin, "application/x-shockwave-flash",
4785 GST_RANK_SECONDARY, swf_type_find, "swf,swfl", SWF_CAPS, NULL, NULL);
4786 TYPE_FIND_REGISTER_START_WITH (plugin, "video/x-flv", GST_RANK_SECONDARY,
4787 "flv", "FLV", 3, GST_TYPE_FIND_MAXIMUM);
4788 TYPE_FIND_REGISTER (plugin, "text/plain", GST_RANK_MARGINAL, utf8_type_find,
4789 "txt", UTF8_CAPS, NULL, NULL);
4790 TYPE_FIND_REGISTER (plugin, "text/utf-16", GST_RANK_MARGINAL, utf16_type_find,
4791 "txt", UTF16_CAPS, NULL, NULL);
4792 TYPE_FIND_REGISTER (plugin, "text/utf-32", GST_RANK_MARGINAL, utf32_type_find,
4793 "txt", UTF32_CAPS, NULL, NULL);
4794 TYPE_FIND_REGISTER (plugin, "text/uri-list", GST_RANK_MARGINAL, uri_type_find,
4795 "ram", URI_CAPS, NULL, NULL);
4796 TYPE_FIND_REGISTER (plugin, "application/x-hls", GST_RANK_MARGINAL,
4797 hls_type_find, "m3u8", HLS_CAPS, NULL, NULL);
4798 TYPE_FIND_REGISTER (plugin, "application/sdp", GST_RANK_SECONDARY,
4799 sdp_type_find, "sdp", SDP_CAPS, NULL, NULL);
4800 TYPE_FIND_REGISTER (plugin, "application/smil", GST_RANK_SECONDARY,
4801 smil_type_find, "smil", SMIL_CAPS, NULL, NULL);
4802 TYPE_FIND_REGISTER (plugin, "application/xml", GST_RANK_MARGINAL,
4803 xml_type_find, "xml", GENERIC_XML_CAPS, NULL, NULL);
4804 TYPE_FIND_REGISTER_RIFF (plugin, "audio/x-wav", GST_RANK_PRIMARY, "wav",
4806 TYPE_FIND_REGISTER (plugin, "audio/x-aiff", GST_RANK_SECONDARY,
4807 aiff_type_find, "aiff,aif,aifc", AIFF_CAPS, NULL, NULL);
4808 TYPE_FIND_REGISTER (plugin, "audio/x-svx", GST_RANK_SECONDARY, svx_type_find,
4809 "iff,svx", SVX_CAPS, NULL, NULL);
4810 TYPE_FIND_REGISTER (plugin, "audio/x-paris", GST_RANK_SECONDARY,
4811 paris_type_find, "paf", PARIS_CAPS, NULL, NULL);
4812 TYPE_FIND_REGISTER_START_WITH (plugin, "audio/x-nist", GST_RANK_SECONDARY,
4813 "nist", "NIST", 4, GST_TYPE_FIND_MAXIMUM);
4814 TYPE_FIND_REGISTER_START_WITH (plugin, "audio/x-voc", GST_RANK_SECONDARY,
4815 "voc", "Creative", 8, GST_TYPE_FIND_MAXIMUM);
4816 TYPE_FIND_REGISTER (plugin, "audio/x-sds", GST_RANK_SECONDARY, sds_type_find,
4817 "sds", SDS_CAPS, NULL, NULL);
4818 TYPE_FIND_REGISTER (plugin, "audio/x-ircam", GST_RANK_SECONDARY,
4819 ircam_type_find, "sf", IRCAM_CAPS, NULL, NULL);
4820 TYPE_FIND_REGISTER_START_WITH (plugin, "audio/x-w64", GST_RANK_SECONDARY,
4821 "w64", "riff", 4, GST_TYPE_FIND_MAXIMUM);
4822 TYPE_FIND_REGISTER (plugin, "audio/x-shorten", GST_RANK_SECONDARY,
4823 shn_type_find, "shn", SHN_CAPS, NULL, NULL);
4824 TYPE_FIND_REGISTER (plugin, "application/x-ape", GST_RANK_SECONDARY,
4825 ape_type_find, "ape", APE_CAPS, NULL, NULL);
4826 TYPE_FIND_REGISTER (plugin, "image/jpeg", GST_RANK_PRIMARY + 15,
4827 jpeg_type_find, "jpg,jpe,jpeg", JPEG_CAPS, NULL, NULL);
4828 TYPE_FIND_REGISTER_START_WITH (plugin, "image/gif", GST_RANK_PRIMARY, "gif",
4829 "GIF8", 4, GST_TYPE_FIND_MAXIMUM);
4830 TYPE_FIND_REGISTER_START_WITH (plugin, "image/png", GST_RANK_PRIMARY + 14,
4831 "png", "\211PNG\015\012\032\012", 8, GST_TYPE_FIND_MAXIMUM);
4832 TYPE_FIND_REGISTER (plugin, "image/bmp", GST_RANK_PRIMARY, bmp_type_find,
4833 "bmp", BMP_CAPS, NULL, NULL);
4834 TYPE_FIND_REGISTER (plugin, "image/tiff", GST_RANK_PRIMARY, tiff_type_find,
4835 "tif,tiff", TIFF_CAPS, NULL, NULL);
4836 TYPE_FIND_REGISTER (plugin, "image/x-portable-pixmap", GST_RANK_SECONDARY,
4837 pnm_type_find, "pnm,ppm,pgm,pbm", PNM_CAPS, NULL, NULL);
4838 TYPE_FIND_REGISTER (plugin, "video/x-matroska", GST_RANK_PRIMARY,
4839 matroska_type_find, "mkv,mka,mk3d,webm", MATROSKA_CAPS, NULL, NULL);
4840 TYPE_FIND_REGISTER (plugin, "application/mxf", GST_RANK_PRIMARY,
4841 mxf_type_find, "mxf", MXF_CAPS, NULL, NULL);
4842 TYPE_FIND_REGISTER_START_WITH (plugin, "video/x-mve", GST_RANK_SECONDARY,
4843 "mve", "Interplay MVE File\032\000\032\000\000\001\063\021", 26,
4844 GST_TYPE_FIND_MAXIMUM);
4845 TYPE_FIND_REGISTER (plugin, "video/x-dv", GST_RANK_SECONDARY, dv_type_find,
4846 "dv,dif", DV_CAPS, NULL, NULL);
4847 TYPE_FIND_REGISTER_START_WITH (plugin, "audio/x-amr-nb-sh", GST_RANK_PRIMARY,
4848 "amr", "#!AMR", 5, GST_TYPE_FIND_LIKELY);
4849 TYPE_FIND_REGISTER_START_WITH (plugin, "audio/x-amr-wb-sh", GST_RANK_PRIMARY,
4850 "amr", "#!AMR-WB", 7, GST_TYPE_FIND_MAXIMUM);
4851 TYPE_FIND_REGISTER (plugin, "audio/iLBC-sh", GST_RANK_PRIMARY, ilbc_type_find,
4852 "ilbc", ILBC_CAPS, NULL, NULL);
4853 TYPE_FIND_REGISTER_START_WITH (plugin, "audio/x-sid", GST_RANK_MARGINAL,
4854 "sid", "PSID", 4, GST_TYPE_FIND_MAXIMUM);
4855 TYPE_FIND_REGISTER_START_WITH (plugin, "image/x-xcf", GST_RANK_SECONDARY,
4856 "xcf", "gimp xcf", 8, GST_TYPE_FIND_MAXIMUM);
4857 TYPE_FIND_REGISTER_START_WITH (plugin, "video/x-mng", GST_RANK_SECONDARY,
4858 "mng", "\212MNG\015\012\032\012", 8, GST_TYPE_FIND_MAXIMUM);
4859 TYPE_FIND_REGISTER_START_WITH (plugin, "image/x-jng", GST_RANK_SECONDARY,
4860 "jng", "\213JNG\015\012\032\012", 8, GST_TYPE_FIND_MAXIMUM);
4861 TYPE_FIND_REGISTER_START_WITH (plugin, "image/x-xpixmap", GST_RANK_SECONDARY,
4862 "xpm", "/* XPM */", 9, GST_TYPE_FIND_MAXIMUM);
4863 TYPE_FIND_REGISTER_START_WITH (plugin, "image/x-sun-raster",
4864 GST_RANK_SECONDARY, "ras", "\131\246\152\225", 4, GST_TYPE_FIND_MAXIMUM);
4865 TYPE_FIND_REGISTER_START_WITH (plugin, "application/x-bzip",
4866 GST_RANK_SECONDARY, "bz2", "BZh", 3, GST_TYPE_FIND_LIKELY);
4867 TYPE_FIND_REGISTER_START_WITH (plugin, "application/x-gzip",
4868 GST_RANK_SECONDARY, "gz", "\037\213", 2, GST_TYPE_FIND_LIKELY);
4869 TYPE_FIND_REGISTER_START_WITH (plugin, "application/zip", GST_RANK_SECONDARY,
4870 "zip", "PK\003\004", 4, GST_TYPE_FIND_LIKELY);
4871 TYPE_FIND_REGISTER_START_WITH (plugin, "application/x-compress",
4872 GST_RANK_SECONDARY, "Z", "\037\235", 2, GST_TYPE_FIND_LIKELY);
4873 TYPE_FIND_REGISTER (plugin, "subtitle/x-kate", GST_RANK_MARGINAL,
4874 kate_type_find, NULL, NULL, NULL, NULL);
4875 TYPE_FIND_REGISTER (plugin, "audio/x-flac", GST_RANK_PRIMARY, flac_type_find,
4876 "flac", FLAC_CAPS, NULL, NULL);
4877 TYPE_FIND_REGISTER (plugin, "audio/x-vorbis", GST_RANK_PRIMARY,
4878 vorbis_type_find, NULL, VORBIS_CAPS, NULL, NULL);
4879 TYPE_FIND_REGISTER (plugin, "video/x-theora", GST_RANK_PRIMARY,
4880 theora_type_find, NULL, THEORA_CAPS, NULL, NULL);
4881 TYPE_FIND_REGISTER (plugin, "application/x-ogm-video", GST_RANK_PRIMARY,
4882 ogmvideo_type_find, NULL, OGMVIDEO_CAPS, NULL, NULL);
4883 TYPE_FIND_REGISTER (plugin, "application/x-ogm-audio", GST_RANK_PRIMARY,
4884 ogmaudio_type_find, NULL, OGMAUDIO_CAPS, NULL, NULL);
4885 TYPE_FIND_REGISTER (plugin, "application/x-ogm-text", GST_RANK_PRIMARY,
4886 ogmtext_type_find, NULL, OGMTEXT_CAPS, NULL, NULL);
4887 TYPE_FIND_REGISTER (plugin, "audio/x-speex", GST_RANK_PRIMARY,
4888 speex_type_find, NULL, SPEEX_CAPS, NULL, NULL);
4889 TYPE_FIND_REGISTER (plugin, "audio/x-celt", GST_RANK_PRIMARY, celt_type_find,
4890 NULL, CELT_CAPS, NULL, NULL);
4891 TYPE_FIND_REGISTER (plugin, "application/x-ogg-skeleton", GST_RANK_PRIMARY,
4892 oggskel_type_find, NULL, OGG_SKELETON_CAPS, NULL, NULL);
4893 TYPE_FIND_REGISTER (plugin, "text/x-cmml", GST_RANK_PRIMARY, cmml_type_find,
4894 NULL, CMML_CAPS, NULL, NULL);
4895 TYPE_FIND_REGISTER_START_WITH (plugin, "application/x-executable",
4896 GST_RANK_MARGINAL, NULL, "\177ELF", 4, GST_TYPE_FIND_MAXIMUM);
4897 TYPE_FIND_REGISTER (plugin, "audio/aac", GST_RANK_SECONDARY, aac_type_find,
4898 "aac,adts,adif,loas", AAC_CAPS, NULL, NULL);
4899 TYPE_FIND_REGISTER_START_WITH (plugin, "audio/x-spc", GST_RANK_SECONDARY,
4900 "spc", "SNES-SPC700 Sound File Data", 27, GST_TYPE_FIND_MAXIMUM);
4901 TYPE_FIND_REGISTER (plugin, "audio/x-wavpack", GST_RANK_SECONDARY,
4902 wavpack_type_find, "wv,wvp", WAVPACK_CAPS, NULL, NULL);
4903 TYPE_FIND_REGISTER (plugin, "audio/x-wavpack-correction", GST_RANK_SECONDARY,
4904 wavpack_type_find, "wvc", WAVPACK_CORRECTION_CAPS, NULL, NULL);
4905 TYPE_FIND_REGISTER (plugin, "application/postscript", GST_RANK_SECONDARY,
4906 postscript_type_find, "ps", POSTSCRIPT_CAPS, NULL, NULL);
4907 TYPE_FIND_REGISTER (plugin, "image/svg+xml", GST_RANK_SECONDARY,
4908 svg_type_find, "svg", SVG_CAPS, NULL, NULL);
4909 TYPE_FIND_REGISTER_START_WITH (plugin, "application/x-rar",
4910 GST_RANK_SECONDARY, "rar", "Rar!", 4, GST_TYPE_FIND_LIKELY);
4911 TYPE_FIND_REGISTER (plugin, "application/x-tar", GST_RANK_SECONDARY,
4912 tar_type_find, "tar", TAR_CAPS, NULL, NULL);
4913 TYPE_FIND_REGISTER (plugin, "application/x-ar", GST_RANK_SECONDARY,
4914 ar_type_find, "a", AR_CAPS, NULL, NULL);
4915 TYPE_FIND_REGISTER (plugin, "application/x-ms-dos-executable",
4916 GST_RANK_SECONDARY, msdos_type_find, "dll,exe,ocx,sys,scr,msstyles,cpl",
4917 MSDOS_CAPS, NULL, NULL);
4918 TYPE_FIND_REGISTER (plugin, "video/x-dirac", GST_RANK_PRIMARY,
4919 dirac_type_find, NULL, DIRAC_CAPS, NULL, NULL);
4920 TYPE_FIND_REGISTER (plugin, "multipart/x-mixed-replace", GST_RANK_SECONDARY,
4921 multipart_type_find, NULL, MULTIPART_CAPS, NULL, NULL);
4922 TYPE_FIND_REGISTER (plugin, "application/x-mmsh", GST_RANK_SECONDARY,
4923 mmsh_type_find, NULL, MMSH_CAPS, NULL, NULL);
4924 TYPE_FIND_REGISTER (plugin, "video/vivo", GST_RANK_SECONDARY, vivo_type_find,
4925 "viv", VIVO_CAPS, NULL, NULL);
4926 TYPE_FIND_REGISTER_START_WITH (plugin, "audio/x-nsf", GST_RANK_SECONDARY,
4927 "nsf", "NESM\x1a", 5, GST_TYPE_FIND_MAXIMUM);
4928 TYPE_FIND_REGISTER_START_WITH (plugin, "audio/x-gym", GST_RANK_SECONDARY,
4929 "gym", "GYMX", 4, GST_TYPE_FIND_MAXIMUM);
4930 TYPE_FIND_REGISTER_START_WITH (plugin, "audio/x-ay", GST_RANK_SECONDARY, "ay",
4931 "ZXAYEMUL", 8, GST_TYPE_FIND_MAXIMUM);
4932 TYPE_FIND_REGISTER_START_WITH (plugin, "audio/x-gbs", GST_RANK_SECONDARY,
4933 "gbs", "GBS\x01", 4, GST_TYPE_FIND_MAXIMUM);
4934 TYPE_FIND_REGISTER_START_WITH (plugin, "audio/x-vgm", GST_RANK_SECONDARY,
4935 "vgm", "Vgm\x20", 4, GST_TYPE_FIND_MAXIMUM);
4936 TYPE_FIND_REGISTER_START_WITH (plugin, "audio/x-sap", GST_RANK_SECONDARY,
4937 "sap", "SAP\x0d\x0a" "AUTHOR\x20", 12, GST_TYPE_FIND_MAXIMUM);
4938 TYPE_FIND_REGISTER_START_WITH (plugin, "video/x-ivf", GST_RANK_SECONDARY,
4939 "ivf", "DKIF", 4, GST_TYPE_FIND_NEARLY_CERTAIN);
4940 TYPE_FIND_REGISTER_START_WITH (plugin, "audio/x-kss", GST_RANK_SECONDARY,
4941 "kss", "KSSX\0", 5, GST_TYPE_FIND_MAXIMUM);
4942 TYPE_FIND_REGISTER_START_WITH (plugin, "application/pdf", GST_RANK_SECONDARY,
4943 "pdf", "%PDF-", 5, GST_TYPE_FIND_LIKELY);
4944 TYPE_FIND_REGISTER_START_WITH (plugin, "application/msword",
4945 GST_RANK_SECONDARY, "doc", "\320\317\021\340\241\261\032\341", 8,
4946 GST_TYPE_FIND_LIKELY);
4947 /* Mac OS X .DS_Store files tend to be taken for video/mpeg */
4948 TYPE_FIND_REGISTER_START_WITH (plugin, "application/octet-stream",
4949 GST_RANK_SECONDARY, "DS_Store", "\000\000\000\001Bud1", 8,
4950 GST_TYPE_FIND_LIKELY);
4951 TYPE_FIND_REGISTER_START_WITH (plugin, "image/vnd.adobe.photoshop",
4952 GST_RANK_SECONDARY, "psd", "8BPS\000\001\000\000\000\000", 10,
4953 GST_TYPE_FIND_LIKELY);
4954 TYPE_FIND_REGISTER (plugin, "image/vnd.wap.wbmp", GST_RANK_MARGINAL,
4955 wbmp_typefind, NULL, NULL, NULL, NULL);
4956 TYPE_FIND_REGISTER_START_WITH (plugin, "application/x-yuv4mpeg",
4957 GST_RANK_SECONDARY, "y4m", "YUV4MPEG2 ", 10, GST_TYPE_FIND_LIKELY);
4958 TYPE_FIND_REGISTER (plugin, "image/x-icon", GST_RANK_MARGINAL,
4959 windows_icon_typefind, NULL, NULL, NULL, NULL);
4962 TYPE_FIND_REGISTER (plugin, "xdgmime-base", GST_RANK_MARGINAL,
4963 xdgmime_typefind, NULL, NULL, NULL, NULL);
4966 TYPE_FIND_REGISTER (plugin, "image/x-degas", GST_RANK_MARGINAL,
4967 degas_type_find, NULL, NULL, NULL, NULL);
4968 TYPE_FIND_REGISTER (plugin, "application/octet-stream", GST_RANK_MARGINAL,
4969 dvdiso_type_find, NULL, NULL, NULL, NULL);
4974 GST_PLUGIN_DEFINE (GST_VERSION_MAJOR,
4977 "default typefind functions",
4978 plugin_init, VERSION, GST_LICENSE, GST_PACKAGE_NAME, GST_PACKAGE_ORIGIN)