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., 59 Temple Place - Suite 330,
21 * Boston, MA 02111-1307, 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>
45 GST_DEBUG_CATEGORY_STATIC (type_find_debug);
46 #define GST_CAT_DEFAULT type_find_debug
48 /* DataScanCtx: helper for typefind functions that scan through data
49 * step-by-step, to avoid doing a peek at each and every offset */
51 #define DATA_SCAN_CTX_CHUNK_SIZE 4096
61 data_scan_ctx_advance (GstTypeFind * tf, DataScanCtx * c, guint bytes_to_skip)
63 c->offset += bytes_to_skip;
64 if (G_LIKELY (c->size > bytes_to_skip)) {
65 c->size -= bytes_to_skip;
66 c->data += bytes_to_skip;
73 static inline gboolean
74 data_scan_ctx_ensure_data (GstTypeFind * tf, DataScanCtx * c, gint min_len)
78 guint chunk_len = MAX (DATA_SCAN_CTX_CHUNK_SIZE, min_len);
80 if (G_LIKELY (c->size >= min_len))
83 data = gst_type_find_peek (tf, c->offset, chunk_len);
84 if (G_LIKELY (data != NULL)) {
90 /* if there's less than our chunk size, try to get as much as we can, but
91 * always at least min_len bytes (we might be typefinding the first buffer
92 * of the stream and not have as much data available as we'd like) */
93 len = gst_type_find_get_length (tf);
95 len = CLAMP (len - c->offset, min_len, chunk_len);
100 data = gst_type_find_peek (tf, c->offset, len);
110 static inline gboolean
111 data_scan_ctx_memcmp (GstTypeFind * tf, DataScanCtx * c, guint offset,
112 const gchar * data, guint len)
114 if (!data_scan_ctx_ensure_data (tf, c, offset + len))
117 return (memcmp (c->data + offset, data, len) == 0);
121 static gboolean xml_check_first_element (GstTypeFind * tf,
122 const gchar * element, guint elen, gboolean strict);
123 static gboolean sdp_check_header (GstTypeFind * tf);
125 static GstStaticCaps utf8_caps = GST_STATIC_CAPS ("text/plain");
127 #define UTF8_CAPS gst_static_caps_get(&utf8_caps)
130 utf8_type_find_have_valid_utf8_at_offset (GstTypeFind * tf, guint64 offset,
131 GstTypeFindProbability * prob)
135 /* randomly decided values */
136 guint min_size = 16; /* minimum size */
137 guint size = 32 * 1024; /* starting size */
138 guint probability = 95; /* starting probability */
139 guint step = 10; /* how much we reduce probability in each
142 while (probability > step && size > min_size) {
143 data = gst_type_find_peek (tf, offset, size);
146 gchar *start = (gchar *) data;
148 if (g_utf8_validate (start, size, (const gchar **) &end) || (end - start + 4 > size)) { /* allow last char to be cut off */
163 utf8_type_find (GstTypeFind * tf, gpointer unused)
165 GstTypeFindProbability start_prob, mid_prob;
168 /* leave xml to the xml typefinders */
169 if (xml_check_first_element (tf, "", 0, TRUE))
172 /* leave sdp to the sdp typefinders */
173 if (sdp_check_header (tf))
176 /* check beginning of stream */
177 if (!utf8_type_find_have_valid_utf8_at_offset (tf, 0, &start_prob))
180 GST_LOG ("start is plain text with probability of %u", start_prob);
182 /* POSSIBLE is the highest probability we ever return if we can't
183 * probe into the middle of the file and don't know its length */
185 length = gst_type_find_get_length (tf);
186 if (length == 0 || length == (guint64) - 1) {
187 gst_type_find_suggest (tf, MIN (start_prob, GST_TYPE_FIND_POSSIBLE),
192 if (length < 64 * 1024) {
193 gst_type_find_suggest (tf, start_prob, UTF8_CAPS);
197 /* check middle of stream */
198 if (!utf8_type_find_have_valid_utf8_at_offset (tf, length / 2, &mid_prob))
201 GST_LOG ("middle is plain text with probability of %u", mid_prob);
202 gst_type_find_suggest (tf, (start_prob + mid_prob) / 2, UTF8_CAPS);
205 /*** text/uri-list ***/
207 static GstStaticCaps uri_caps = GST_STATIC_CAPS ("text/uri-list");
209 #define URI_CAPS (gst_static_caps_get(&uri_caps))
210 #define BUFFER_SIZE 16 /* If the string is < 16 bytes we're screwed */
211 #define INC_BUFFER { \
213 if (pos == BUFFER_SIZE) { \
215 offset += BUFFER_SIZE; \
216 data = gst_type_find_peek (tf, offset, BUFFER_SIZE); \
217 if (data == NULL) return; \
223 uri_type_find (GstTypeFind * tf, gpointer unused)
225 guint8 *data = gst_type_find_peek (tf, 0, BUFFER_SIZE);
230 /* Search for # comment lines */
231 while (*data == '#') {
232 /* Goto end of line */
233 while (*data != '\n') {
240 if (!g_ascii_isalpha (*data)) {
241 /* Had a non alpha char - can't be uri-list */
247 while (g_ascii_isalnum (*data)) {
252 /* First non alpha char is not a : */
256 /* Get the next 2 bytes as well */
257 data = gst_type_find_peek (tf, offset + pos, 3);
261 if (data[1] != '/' && data[2] != '/') {
265 gst_type_find_suggest (tf, GST_TYPE_FIND_MAXIMUM, URI_CAPS);
269 /*** playlist/m3u8 ***/
271 static GstStaticCaps m3u8_caps = GST_STATIC_CAPS ("playlist/m3u8");
272 #define M3U8_CAPS (gst_static_caps_get(&m3u8_caps))
274 /* See http://tools.ietf.org/html/draft-pantos-http-live-streaming-05 */
276 m3u8_type_find (GstTypeFind * tf, gpointer unused)
278 DataScanCtx c = { 0, NULL, 0 };
280 if (G_UNLIKELY (!data_scan_ctx_ensure_data (tf, &c, 7)))
283 if (memcmp (c.data, "#EXTM3U", 7))
286 data_scan_ctx_advance (tf, &c, 7);
288 /* Check only the first 256 bytes */
289 while (c.offset < 256) {
290 if (G_UNLIKELY (!data_scan_ctx_ensure_data (tf, &c, 21)))
293 /* Search for # comment lines */
294 if (c.data[0] == '#' && (memcmp (c.data, "#EXT-X-TARGETDURATION", 21) == 0
295 || memcmp (c.data, "#EXT-X-STREAM-INF", 17) == 0)) {
296 gst_type_find_suggest (tf, GST_TYPE_FIND_MAXIMUM, M3U8_CAPS);
300 data_scan_ctx_advance (tf, &c, 1);
305 /*** application/xml **********************************************************/
307 #define XML_BUFFER_SIZE 16
308 #define XML_INC_BUFFER { \
310 if (pos == XML_BUFFER_SIZE) { \
312 offset += XML_BUFFER_SIZE; \
313 data = gst_type_find_peek (tf, offset, XML_BUFFER_SIZE); \
314 if (data == NULL) return FALSE; \
321 xml_check_first_element (GstTypeFind * tf, const gchar * element, guint elen,
329 data = gst_type_find_peek (tf, 0, XML_BUFFER_SIZE);
333 /* look for the XMLDec
334 * see XML spec 2.8, Prolog and Document Type Declaration
335 * http://www.w3.org/TR/2004/REC-xml-20040204/#sec-prolog-dtd */
336 got_xmldec = (memcmp (data, "<?xml", 5) == 0);
338 if (strict && !got_xmldec)
341 /* skip XMLDec in any case if we've got one */
347 /* look for the first element, it has to be the requested element. Bail
348 * out if it is not within the first 4kB. */
349 while (data && (offset + pos) < 4096) {
350 while (*data != '<' && (offset + pos) < 4096) {
355 if (!g_ascii_isalpha (*data)) {
356 /* if not alphabetic, it's a PI or an element / attribute declaration
357 * like <?xxx or <!xxx */
362 /* the first normal element, check if it's the one asked for */
363 data = gst_type_find_peek (tf, offset + pos, elen + 1);
364 return (data && element && strncmp ((char *) data, element, elen) == 0);
370 static GstStaticCaps generic_xml_caps = GST_STATIC_CAPS ("application/xml");
372 #define GENERIC_XML_CAPS (gst_static_caps_get(&generic_xml_caps))
374 xml_type_find (GstTypeFind * tf, gpointer unused)
376 if (xml_check_first_element (tf, "", 0, TRUE)) {
377 gst_type_find_suggest (tf, GST_TYPE_FIND_MINIMUM, GENERIC_XML_CAPS);
381 /*** application/sdp *********************************************************/
383 static GstStaticCaps sdp_caps = GST_STATIC_CAPS ("application/sdp");
385 #define SDP_CAPS (gst_static_caps_get(&sdp_caps))
387 sdp_check_header (GstTypeFind * tf)
391 data = gst_type_find_peek (tf, 0, 5);
395 /* sdp must start with v=0[\r]\n */
396 if (memcmp (data, "v=0", 3))
399 if (data[3] == '\r' && data[4] == '\n')
408 sdp_type_find (GstTypeFind * tf, gpointer unused)
410 if (sdp_check_header (tf))
411 gst_type_find_suggest (tf, GST_TYPE_FIND_MAXIMUM, SDP_CAPS);
414 /*** application/smil *********************************************************/
416 static GstStaticCaps smil_caps = GST_STATIC_CAPS ("application/smil");
418 #define SMIL_CAPS (gst_static_caps_get(&smil_caps))
420 smil_type_find (GstTypeFind * tf, gpointer unused)
422 if (xml_check_first_element (tf, "smil", 4, FALSE)) {
423 gst_type_find_suggest (tf, GST_TYPE_FIND_MAXIMUM, SMIL_CAPS);
429 static GstStaticCaps html_caps = GST_STATIC_CAPS ("text/html");
431 #define HTML_CAPS gst_static_caps_get (&html_caps)
434 html_type_find (GstTypeFind * tf, gpointer unused)
438 data = (gchar *) gst_type_find_peek (tf, 0, 16);
442 if (!g_ascii_strncasecmp (data, "<!DOCTYPE HTML", 14)) {
443 gst_type_find_suggest (tf, GST_TYPE_FIND_MAXIMUM, HTML_CAPS);
444 } else if (xml_check_first_element (tf, "html", 4, FALSE)) {
445 gst_type_find_suggest (tf, GST_TYPE_FIND_MAXIMUM, HTML_CAPS);
446 } else if ((d = memchr (data, '<', 16))) {
447 data = (gchar *) gst_type_find_peek (tf, d - data, 6);
448 if (data && g_ascii_strncasecmp (data, "<html>", 6) == 0) {
449 gst_type_find_suggest (tf, GST_TYPE_FIND_MAXIMUM, HTML_CAPS);
456 static GstStaticCaps mid_caps = GST_STATIC_CAPS ("audio/midi");
458 #define MID_CAPS gst_static_caps_get(&mid_caps)
460 mid_type_find (GstTypeFind * tf, gpointer unused)
462 guint8 *data = gst_type_find_peek (tf, 0, 4);
464 /* http://jedi.ks.uiuc.edu/~johns/links/music/midifile.html */
465 if (data && data[0] == 'M' && data[1] == 'T' && data[2] == 'h'
467 gst_type_find_suggest (tf, GST_TYPE_FIND_MAXIMUM, MID_CAPS);
470 /*** audio/mobile-xmf ***/
472 static GstStaticCaps mxmf_caps = GST_STATIC_CAPS ("audio/mobile-xmf");
474 #define MXMF_CAPS gst_static_caps_get(&mxmf_caps)
476 mxmf_type_find (GstTypeFind * tf, gpointer unused)
480 /* Search FileId "XMF_" 4 bytes */
481 data = gst_type_find_peek (tf, 0, 4);
482 if (data && data[0] == 'X' && data[1] == 'M' && data[2] == 'F'
484 /* Search Format version "2.00" 4 bytes */
485 data = gst_type_find_peek (tf, 4, 4);
486 if (data && data[0] == '2' && data[1] == '.' && data[2] == '0'
488 /* Search TypeId 2 1 byte */
489 data = gst_type_find_peek (tf, 11, 1);
490 if (data && data[0] == 2) {
491 gst_type_find_suggest (tf, GST_TYPE_FIND_MAXIMUM, MXMF_CAPS);
498 /*** video/x-fli ***/
500 static GstStaticCaps flx_caps = GST_STATIC_CAPS ("video/x-fli");
502 #define FLX_CAPS gst_static_caps_get(&flx_caps)
504 flx_type_find (GstTypeFind * tf, gpointer unused)
506 guint8 *data = gst_type_find_peek (tf, 0, 134);
509 /* check magic and the frame type of the first frame */
510 if ((data[4] == 0x11 || data[4] == 0x12 ||
511 data[4] == 0x30 || data[4] == 0x44) &&
513 ((data[132] == 0x00 || data[132] == 0xfa) && data[133] == 0xf1)) {
514 gst_type_find_suggest (tf, GST_TYPE_FIND_MAXIMUM, FLX_CAPS);
518 data = gst_type_find_peek (tf, 0, 6);
520 /* check magic only */
521 if ((data[4] == 0x11 || data[4] == 0x12 ||
522 data[4] == 0x30 || data[4] == 0x44) && data[5] == 0xaf) {
523 gst_type_find_suggest (tf, GST_TYPE_FIND_LIKELY, FLX_CAPS);
529 /*** application/x-id3 ***/
531 static GstStaticCaps id3_caps = GST_STATIC_CAPS ("application/x-id3");
533 #define ID3_CAPS gst_static_caps_get(&id3_caps)
535 id3v2_type_find (GstTypeFind * tf, gpointer unused)
537 guint8 *data = gst_type_find_peek (tf, 0, 10);
539 if (data && memcmp (data, "ID3", 3) == 0 &&
540 data[3] != 0xFF && data[4] != 0xFF &&
541 (data[6] & 0x80) == 0 && (data[7] & 0x80) == 0 &&
542 (data[8] & 0x80) == 0 && (data[9] & 0x80) == 0) {
543 gst_type_find_suggest (tf, GST_TYPE_FIND_MAXIMUM, ID3_CAPS);
548 id3v1_type_find (GstTypeFind * tf, gpointer unused)
550 guint8 *data = gst_type_find_peek (tf, -128, 3);
552 if (data && memcmp (data, "TAG", 3) == 0) {
553 gst_type_find_suggest (tf, GST_TYPE_FIND_MAXIMUM, ID3_CAPS);
557 /*** application/x-ape ***/
559 static GstStaticCaps apetag_caps = GST_STATIC_CAPS ("application/x-apetag");
561 #define APETAG_CAPS gst_static_caps_get(&apetag_caps)
563 apetag_type_find (GstTypeFind * tf, gpointer unused)
567 /* APEv1/2 at start of file */
568 data = gst_type_find_peek (tf, 0, 8);
569 if (data && !memcmp (data, "APETAGEX", 8)) {
570 gst_type_find_suggest (tf, GST_TYPE_FIND_MAXIMUM, APETAG_CAPS);
574 /* APEv1/2 at end of file */
575 data = gst_type_find_peek (tf, -32, 8);
576 if (data && !memcmp (data, "APETAGEX", 8)) {
577 gst_type_find_suggest (tf, GST_TYPE_FIND_MAXIMUM, APETAG_CAPS);
582 /*** audio/x-ttafile ***/
584 static GstStaticCaps tta_caps = GST_STATIC_CAPS ("audio/x-ttafile");
586 #define TTA_CAPS gst_static_caps_get(&tta_caps)
588 tta_type_find (GstTypeFind * tf, gpointer unused)
590 guint8 *data = gst_type_find_peek (tf, 0, 3);
593 if (memcmp (data, "TTA", 3) == 0) {
594 gst_type_find_suggest (tf, GST_TYPE_FIND_MAXIMUM, TTA_CAPS);
600 /*** audio/x-flac ***/
601 static GstStaticCaps flac_caps = GST_STATIC_CAPS ("audio/x-flac");
603 #define FLAC_CAPS (gst_static_caps_get(&flac_caps))
606 flac_type_find (GstTypeFind * tf, gpointer unused)
608 DataScanCtx c = { 0, NULL, 0 };
610 if (G_UNLIKELY (!data_scan_ctx_ensure_data (tf, &c, 4)))
613 /* standard flac (also old/broken flac-in-ogg with an initial 4-byte marker
614 * packet and without the usual packet framing) */
615 if (memcmp (c.data, "fLaC", 4) == 0) {
616 gst_type_find_suggest (tf, GST_TYPE_FIND_MAXIMUM, FLAC_CAPS);
620 if (G_UNLIKELY (!data_scan_ctx_ensure_data (tf, &c, 6)))
623 /* flac-in-ogg, see http://flac.sourceforge.net/ogg_mapping.html */
624 if (memcmp (c.data, "\177FLAC\001", 6) == 0) {
625 gst_type_find_suggest (tf, GST_TYPE_FIND_MAXIMUM, FLAC_CAPS);
629 /* disabled because it happily typefinds /dev/urandom as audio/x-flac, and
630 * because I yet have to see header-less flac in the wild */
632 /* flac without headers (subset format) */
633 /* 64K should be enough */
634 while (c.offset < (64 * 1024)) {
635 if (G_UNLIKELY (!data_scan_ctx_ensure_data (tf, &c, 4)))
638 /* look for frame header,
639 * http://flac.sourceforge.net/format.html#frame_header
641 if (c.data[0] == 0xff && (c.data[1] >> 2) == 0x3e) {
642 /* bit 15 in the header must be 0 */
643 if (((c.data[1] >> 1) & 0x01) == 0x01)
646 /* blocksize must be != 0x00 */
647 if ((c.data[2] >> 4) == 0x00)
650 /* samplerate must be != 0x0f */
651 if ((c.data[2] & 0x0f) == 0x0f)
653 /* also 0 is invalid, as it means get the info from the header and we
654 * don't have headers if we are here */
655 if ((c.data[2] & 0x0f) == 0x00)
658 /* channel assignment must be < 11 */
659 if ((c.data[3] >> 4) >= 11)
662 /* sample size must be != 0x07 and != 0x05 */
663 if (((c.data[3] >> 1) & 0x07) == 0x07)
665 if (((c.data[3] >> 1) & 0x07) == 0x05)
667 /* also 0 is invalid, as it means get the info from the header and we
668 * don't have headers if we are here */
669 if (((c.data[3] >> 1) & 0x07) == 0x00)
672 /* next bit must be 0 */
673 if ((c.data[3] & 0x01) == 0x01)
676 /* FIXME: shouldn't we include the crc check ? */
678 GST_DEBUG ("Found flac without headers at %d", (gint) c.offset);
679 gst_type_find_suggest (tf, GST_TYPE_FIND_POSSIBLE, FLAC_CAPS);
683 data_scan_ctx_advance (tf, &c, 1);
688 /*** audio/mpeg version 2, 4 ***/
690 static GstStaticCaps aac_caps = GST_STATIC_CAPS ("audio/mpeg, "
691 "mpegversion = (int) { 2, 4 }, framed = (bool) false");
692 #define AAC_CAPS (gst_static_caps_get(&aac_caps))
693 #define AAC_AMOUNT (4096)
695 aac_type_find (GstTypeFind * tf, gpointer unused)
697 /* LUT to convert the AudioObjectType from the ADTS header to a string */
698 DataScanCtx c = { 0, NULL, 0 };
700 while (c.offset < AAC_AMOUNT) {
703 /* detect adts header or adif header.
704 * The ADIF header is 4 bytes, that should be OK. The ADTS header, on
705 * the other hand, is 14 bits only, so we require one valid frame with
706 * again a valid syncpoint on the next one (28 bits) for certainty. We
707 * require 4 kB, which is quite a lot, since frames are generally 200-400
709 * LOAS has 2 possible syncwords, which are 11 bits and 16 bits long.
710 * The following stream syntax depends on which one is found.
712 if (G_UNLIKELY (!data_scan_ctx_ensure_data (tf, &c, 6)))
715 snc = GST_READ_UINT16_BE (c.data);
716 if (G_UNLIKELY ((snc & 0xfff6) == 0xfff0)) {
717 /* ADTS header - find frame length */
718 GST_DEBUG ("Found one ADTS syncpoint at offset 0x%" G_GINT64_MODIFIER
719 "x, tracing next...", c.offset);
720 len = ((c.data[3] & 0x03) << 11) |
721 (c.data[4] << 3) | ((c.data[5] & 0xe0) >> 5);
723 if (len == 0 || !data_scan_ctx_ensure_data (tf, &c, len + 2)) {
724 GST_DEBUG ("Wrong sync or next frame not within reach, len=%u", len);
728 /* check if there's a second ADTS frame */
729 snc = GST_READ_UINT16_BE (c.data + len);
730 if ((snc & 0xfff6) == 0xfff0) {
732 guint mpegversion, sample_freq_idx, channel_config, profile_idx, rate;
733 guint8 audio_config[2];
735 mpegversion = (c.data[1] & 0x08) ? 2 : 4;
736 profile_idx = c.data[2] >> 6;
737 sample_freq_idx = ((c.data[2] & 0x3c) >> 2);
738 channel_config = ((c.data[2] & 0x01) << 2) + (c.data[3] >> 6);
740 GST_DEBUG ("Found second ADTS-%d syncpoint at offset 0x%"
741 G_GINT64_MODIFIER "x, framelen %u", mpegversion, c.offset, len);
743 /* 0xd and 0xe are reserved. 0xf means the sample frequency is directly
744 * specified in the header, but that's not allowed for ADTS */
745 if (sample_freq_idx > 0xc) {
746 GST_DEBUG ("Unexpected sample frequency index %d or wrong sync",
751 rate = gst_codec_utils_aac_get_sample_rate_from_index (sample_freq_idx);
752 GST_LOG ("ADTS: profile=%u, rate=%u", profile_idx, rate);
754 /* The ADTS frame header is slightly different from the
755 * AudioSpecificConfig defined for the MPEG-4 container, so we just
756 * construct enough of it for getting the level here. */
757 /* ADTS counts profiles from 0 instead of 1 to save bits */
758 audio_config[0] = (profile_idx + 1) << 3;
759 audio_config[0] |= (sample_freq_idx >> 1) & 0x7;
760 audio_config[1] = (sample_freq_idx & 0x1) << 7;
761 audio_config[1] |= (channel_config & 0xf) << 3;
763 caps = gst_caps_new_simple ("audio/mpeg",
764 "framed", G_TYPE_BOOLEAN, FALSE,
765 "mpegversion", G_TYPE_INT, mpegversion,
766 "stream-format", G_TYPE_STRING, "adts", NULL);
768 gst_codec_utils_aac_caps_set_level_and_profile (caps, audio_config, 2);
770 /* add rate and number of channels if we can */
771 if (channel_config != 0 && channel_config <= 7) {
772 const guint channels_map[] = { 0, 1, 2, 3, 4, 5, 6, 8 };
774 gst_caps_set_simple (caps, "channels", G_TYPE_INT,
775 channels_map[channel_config], "rate", G_TYPE_INT, rate, NULL);
778 gst_type_find_suggest (tf, GST_TYPE_FIND_LIKELY, caps);
779 gst_caps_unref (caps);
783 GST_DEBUG ("No next frame found... (should have been at 0x%x)", len);
784 } else if (G_UNLIKELY (((snc & 0xffe0) == 0x56e0) || (snc == 0x4de1))) {
787 GST_DEBUG ("Found one LOAS syncword at offset 0x%" G_GINT64_MODIFIER
788 "x, tracing next...", c.offset);
790 /* check length of frame for each type of detectable LOAS streams */
792 /* EPAudioSyncStream */
793 len = ((c.data[2] & 0x0f) << 9) | (c.data[3] << 1) |
794 ((c.data[4] & 0x80) >> 7);
795 /* add size of EP sync stream header */
798 /* AudioSyncStream */
799 len = ((c.data[1] & 0x1f) << 8) | c.data[2];
800 /* add size of sync stream header */
804 if (len == 0 || !data_scan_ctx_ensure_data (tf, &c, len + 2)) {
805 GST_DEBUG ("Wrong sync or next frame not within reach, len=%u", len);
809 /* check if there's a second LOAS frame */
810 snc = GST_READ_UINT16_BE (c.data + len);
811 if (((snc & 0xffe0) == 0x56e0) || (snc == 0x4de1)) {
812 GST_DEBUG ("Found second LOAS syncword at offset 0x%"
813 G_GINT64_MODIFIER "x, framelen %u", c.offset, len);
815 gst_type_find_suggest_simple (tf, GST_TYPE_FIND_LIKELY, "audio/mpeg",
816 "framed", G_TYPE_BOOLEAN, FALSE,
817 "mpegversion", G_TYPE_INT, 4,
818 "stream-format", G_TYPE_STRING, "loas", NULL);
822 GST_DEBUG ("No next frame found... (should have been at 0x%x)", len);
823 } else if (!memcmp (c.data, "ADIF", 4)) {
825 gst_type_find_suggest_simple (tf, GST_TYPE_FIND_LIKELY, "audio/mpeg",
826 "framed", G_TYPE_BOOLEAN, FALSE, "mpegversion", G_TYPE_INT, 4,
827 "stream-format", G_TYPE_STRING, "adif", NULL);
833 data_scan_ctx_advance (tf, &c, 1);
837 /*** audio/mpeg version 1 ***/
840 * The chance that random data is identified as a valid mp3 header is 63 / 2^18
841 * (0.024%) per try. This makes the function for calculating false positives
842 * 1 - (1 - ((63 / 2 ^18) ^ GST_MP3_TYPEFIND_MIN_HEADERS)) ^ buffersize)
843 * This has the following probabilities of false positives:
844 * datasize MIN_HEADERS
846 * 4096 62.6% 0.02% 0% 0%
847 * 16384 98% 0.09% 0% 0%
848 * 1 MiB 100% 5.88% 0% 0%
849 * 1 GiB 100% 100% 1.44% 0%
850 * 1 TiB 100% 100% 100% 0.35%
851 * This means that the current choice (3 headers by most of the time 4096 byte
852 * buffers is pretty safe for now.
854 * The max. size of each frame is 1440 bytes, which means that for N frames to
855 * be detected, we need 1440 * GST_MP3_TYPEFIND_MIN_HEADERS + 3 bytes of data.
856 * Assuming we step into the stream right after the frame header, this
857 * means we need 1440 * (GST_MP3_TYPEFIND_MIN_HEADERS + 1) - 1 + 3 bytes
858 * of data (5762) to always detect any mp3.
861 static const guint mp3types_bitrates[2][3][16] =
862 { {{0, 32, 64, 96, 128, 160, 192, 224, 256, 288, 320, 352, 384, 416, 448,},
863 {0, 32, 48, 56, 64, 80, 96, 112, 128, 160, 192, 224, 256, 320, 384,},
864 {0, 32, 40, 48, 56, 64, 80, 96, 112, 128, 160, 192, 224, 256, 320,}},
865 {{0, 32, 48, 56, 64, 80, 96, 112, 128, 144, 160, 176, 192, 224, 256,},
866 {0, 8, 16, 24, 32, 40, 48, 56, 64, 80, 96, 112, 128, 144, 160,},
867 {0, 8, 16, 24, 32, 40, 48, 56, 64, 80, 96, 112, 128, 144, 160,}},
870 static const guint mp3types_freqs[3][3] = { {11025, 12000, 8000},
871 {22050, 24000, 16000},
872 {44100, 48000, 32000}
876 mp3_type_frame_length_from_header (guint32 header, guint * put_layer,
877 guint * put_channels, guint * put_bitrate, guint * put_samplerate,
878 gboolean * may_be_free_format, gint possible_free_framelen)
880 guint bitrate, layer, length, mode, samplerate, version, channels;
882 if ((header & 0xffe00000) != 0xffe00000)
885 /* we don't need extension, copyright, original or
886 * emphasis for the frame length */
894 length = header & 0x1;
897 /* sampling frequency */
898 samplerate = header & 0x3;
904 bitrate = header & 0xF;
905 if (bitrate == 0 && possible_free_framelen == -1) {
906 GST_LOG ("Possibly a free format mp3 - signalling");
907 *may_be_free_format = TRUE;
909 if (bitrate == 15 || (bitrate == 0 && possible_free_framelen == -1))
912 /* ignore error correction, too */
916 layer = 4 - (header & 0x3);
921 /* version 0=MPEG2.5; 2=MPEG2; 3=MPEG1 */
922 version = header & 0x3;
927 channels = (mode == 3) ? 1 : 2;
928 samplerate = mp3types_freqs[version > 0 ? version - 1 : 0][samplerate];
932 length += possible_free_framelen;
933 bitrate = length * samplerate / 48000;
935 length += possible_free_framelen;
936 bitrate = length * samplerate /
937 ((layer == 3 && version != 3) ? 72000 : 144000);
941 bitrate = mp3types_bitrates[version == 3 ? 0 : 1][layer - 1][bitrate];
943 length = ((12000 * bitrate / samplerate) + length) * 4;
945 length += ((layer == 3
946 && version != 3) ? 72000 : 144000) * bitrate / samplerate;
950 GST_LOG ("mp3typefind: calculated mp3 frame length of %u bytes", length);
952 ("mp3typefind: samplerate = %u - bitrate = %u - layer = %u - version = %u"
953 " - channels = %u", samplerate, bitrate, layer, version, channels);
958 *put_channels = channels;
960 *put_bitrate = bitrate;
962 *put_samplerate = samplerate;
968 static GstStaticCaps mp3_caps = GST_STATIC_CAPS ("audio/mpeg, "
969 "mpegversion = (int) 1, layer = (int) [ 1, 3 ]");
970 #define MP3_CAPS (gst_static_caps_get(&mp3_caps))
972 * random values for typefinding
973 * if no more data is available, we will return a probability of
974 * (found_headers/TRY_HEADERS) * (MAXIMUM * (TRY_SYNC - bytes_skipped)
976 * if found_headers >= MIN_HEADERS
978 #define GST_MP3_TYPEFIND_MIN_HEADERS (2)
979 #define GST_MP3_TYPEFIND_TRY_HEADERS (5)
980 #define GST_MP3_TYPEFIND_TRY_SYNC (GST_TYPE_FIND_MAXIMUM * 100) /* 10kB */
981 #define GST_MP3_TYPEFIND_SYNC_SIZE (2048)
982 #define GST_MP3_WRONG_HEADER (10)
985 mp3_type_find_at_offset (GstTypeFind * tf, guint64 start_off,
986 guint * found_layer, GstTypeFindProbability * found_prob)
989 guint8 *data_end = NULL;
992 gint last_free_offset = -1;
993 gint last_free_framelen = -1;
994 gboolean headerstart = TRUE;
1001 while (skipped < GST_MP3_TYPEFIND_TRY_SYNC) {
1003 size = GST_MP3_TYPEFIND_SYNC_SIZE * 2;
1006 data = gst_type_find_peek (tf, skipped + start_off, size);
1007 } while (size > 10 && !data);
1010 data_end = data + size;
1012 if (*data == 0xFF) {
1013 guint8 *head_data = NULL;
1014 guint layer = 0, bitrate, samplerate, channels;
1015 guint found = 0; /* number of valid headers found */
1016 guint64 offset = skipped;
1018 while (found < GST_MP3_TYPEFIND_TRY_HEADERS) {
1021 guint prev_layer = 0, prev_bitrate = 0;
1022 guint prev_channels = 0, prev_samplerate = 0;
1023 gboolean free = FALSE;
1025 if ((gint64) (offset - skipped + 4) >= 0 &&
1026 data + offset - skipped + 4 < data_end) {
1027 head_data = data + offset - skipped;
1029 head_data = gst_type_find_peek (tf, offset + start_off, 4);
1033 head = GST_READ_UINT32_BE (head_data);
1034 if (!(length = mp3_type_frame_length_from_header (head, &layer,
1035 &channels, &bitrate, &samplerate, &free,
1036 last_free_framelen))) {
1038 if (last_free_offset == -1)
1039 last_free_offset = offset;
1041 last_free_framelen = offset - last_free_offset;
1042 offset = last_free_offset;
1046 last_free_framelen = -1;
1049 /* Mark the fact that we didn't find a valid header at the beginning */
1051 headerstart = FALSE;
1053 GST_LOG ("%d. header at offset %" G_GUINT64_FORMAT
1054 " (0x%" G_GINT64_MODIFIER "x) was not an mp3 header "
1055 "(possibly-free: %s)", found + 1, start_off + offset,
1056 start_off + offset, free ? "yes" : "no");
1059 if ((prev_layer && prev_layer != layer) ||
1060 /* (prev_bitrate && prev_bitrate != bitrate) || <-- VBR */
1061 (prev_samplerate && prev_samplerate != samplerate) ||
1062 (prev_channels && prev_channels != channels)) {
1063 /* this means an invalid property, or a change, which might mean
1064 * that this is not a mp3 but just a random bytestream. It could
1065 * be a freaking funky encoded mp3 though. We'll just not count
1068 prev_bitrate = bitrate;
1069 prev_channels = channels;
1070 prev_samplerate = samplerate;
1073 GST_LOG ("found %d. header at offset %" G_GUINT64_FORMAT " (0x%"
1074 G_GINT64_MODIFIER "X)", found, start_off + offset,
1075 start_off + offset);
1079 g_assert (found <= GST_MP3_TYPEFIND_TRY_HEADERS);
1080 if (head_data == NULL &&
1081 gst_type_find_peek (tf, offset + start_off - 1, 1) == NULL)
1082 /* Incomplete last frame - don't count it. */
1084 if (found == GST_MP3_TYPEFIND_TRY_HEADERS ||
1085 (found >= GST_MP3_TYPEFIND_MIN_HEADERS && head_data == NULL)) {
1086 /* we can make a valid guess */
1087 guint probability = found * GST_TYPE_FIND_MAXIMUM *
1088 (GST_MP3_TYPEFIND_TRY_SYNC - skipped) /
1089 GST_MP3_TYPEFIND_TRY_HEADERS / GST_MP3_TYPEFIND_TRY_SYNC;
1092 && probability > (GST_TYPE_FIND_MINIMUM + GST_MP3_WRONG_HEADER))
1093 probability -= GST_MP3_WRONG_HEADER;
1094 if (probability < GST_TYPE_FIND_MINIMUM)
1095 probability = GST_TYPE_FIND_MINIMUM;
1100 ("audio/mpeg calculated %u = %u * %u / %u * (%u - %"
1101 G_GUINT64_FORMAT ") / %u", probability, GST_TYPE_FIND_MAXIMUM,
1102 found, GST_MP3_TYPEFIND_TRY_HEADERS, GST_MP3_TYPEFIND_TRY_SYNC,
1103 (guint64) skipped, GST_MP3_TYPEFIND_TRY_SYNC);
1104 /* make sure we're not id3 tagged */
1105 head_data = gst_type_find_peek (tf, -128, 3);
1106 if (head_data && (memcmp (head_data, "TAG", 3) == 0)) {
1109 g_assert (probability <= GST_TYPE_FIND_MAXIMUM);
1111 *found_prob = probability;
1112 if (probability > 0)
1113 *found_layer = layer;
1124 mp3_type_find (GstTypeFind * tf, gpointer unused)
1126 GstTypeFindProbability prob, mid_prob;
1128 guint layer, mid_layer;
1131 mp3_type_find_at_offset (tf, 0, &layer, &prob);
1132 length = gst_type_find_get_length (tf);
1134 if (length == 0 || length == (guint64) - 1) {
1140 /* if we're pretty certain already, skip the additional check */
1141 if (prob >= GST_TYPE_FIND_LIKELY)
1144 mp3_type_find_at_offset (tf, length / 2, &mid_layer, &mid_prob);
1148 GST_LOG ("detected audio/mpeg only in the middle (p=%u)", mid_prob);
1154 if (layer != mid_layer) {
1155 GST_WARNING ("audio/mpeg layer discrepancy: %u vs. %u", layer, mid_layer);
1156 return; /* FIXME: or should we just go with the one in the middle? */
1159 /* detected mpeg audio both in middle of the file and at the start */
1160 prob = (prob + mid_prob) / 2;
1164 /* let's see if there's a valid header right at the start */
1165 data = gst_type_find_peek (tf, 0, 4); /* use min. frame size? */
1166 if (data && mp3_type_frame_length_from_header (GST_READ_UINT32_BE (data),
1167 &layer, NULL, NULL, NULL, NULL, 0) != 0) {
1169 prob = GST_TYPE_FIND_POSSIBLE - 10;
1171 prob = MAX (GST_TYPE_FIND_POSSIBLE - 10, prob + 10);
1181 g_return_if_fail (layer >= 1 && layer <= 3);
1183 gst_type_find_suggest_simple (tf, prob, "audio/mpeg",
1184 "mpegversion", G_TYPE_INT, 1, "layer", G_TYPE_INT, layer, NULL);
1188 /*** audio/x-musepack ***/
1190 static GstStaticCaps musepack_caps =
1191 GST_STATIC_CAPS ("audio/x-musepack, streamversion= (int) { 7, 8 }");
1193 #define MUSEPACK_CAPS (gst_static_caps_get(&musepack_caps))
1195 musepack_type_find (GstTypeFind * tf, gpointer unused)
1197 guint8 *data = gst_type_find_peek (tf, 0, 4);
1198 GstTypeFindProbability prop = GST_TYPE_FIND_MINIMUM;
1199 gint streamversion = -1;
1201 if (data && memcmp (data, "MP+", 3) == 0) {
1203 if ((data[3] & 0x7f) == 7) {
1204 prop = GST_TYPE_FIND_MAXIMUM;
1206 prop = GST_TYPE_FIND_LIKELY + 10;
1208 } else if (data && memcmp (data, "MPCK", 4) == 0) {
1210 prop = GST_TYPE_FIND_MAXIMUM;
1213 if (streamversion != -1) {
1214 gst_type_find_suggest_simple (tf, prop, "audio/x-musepack",
1215 "streamversion", G_TYPE_INT, streamversion, NULL);
1219 /*** audio/x-ac3 ***/
1220 /* FIXME 0.11: should be audio/ac3, but isn't for backwards compatibility */
1221 static GstStaticCaps ac3_caps = GST_STATIC_CAPS ("audio/x-ac3");
1223 #define AC3_CAPS (gst_static_caps_get(&ac3_caps))
1225 static GstStaticCaps eac3_caps = GST_STATIC_CAPS ("audio/x-eac3");
1227 #define EAC3_CAPS (gst_static_caps_get(&eac3_caps))
1231 unsigned short bit_rate;
1232 unsigned short frm_size[3];
1235 static const struct ac3_frmsize ac3_frmsizecod_tbl[] = {
1238 {40, {80, 87, 120}},
1239 {40, {80, 88, 120}},
1240 {48, {96, 104, 144}},
1241 {48, {96, 105, 144}},
1242 {56, {112, 121, 168}},
1243 {56, {112, 122, 168}},
1244 {64, {128, 139, 192}},
1245 {64, {128, 140, 192}},
1246 {80, {160, 174, 240}},
1247 {80, {160, 175, 240}},
1248 {96, {192, 208, 288}},
1249 {96, {192, 209, 288}},
1250 {112, {224, 243, 336}},
1251 {112, {224, 244, 336}},
1252 {128, {256, 278, 384}},
1253 {128, {256, 279, 384}},
1254 {160, {320, 348, 480}},
1255 {160, {320, 349, 480}},
1256 {192, {384, 417, 576}},
1257 {192, {384, 418, 576}},
1258 {224, {448, 487, 672}},
1259 {224, {448, 488, 672}},
1260 {256, {512, 557, 768}},
1261 {256, {512, 558, 768}},
1262 {320, {640, 696, 960}},
1263 {320, {640, 697, 960}},
1264 {384, {768, 835, 1152}},
1265 {384, {768, 836, 1152}},
1266 {448, {896, 975, 1344}},
1267 {448, {896, 976, 1344}},
1268 {512, {1024, 1114, 1536}},
1269 {512, {1024, 1115, 1536}},
1270 {576, {1152, 1253, 1728}},
1271 {576, {1152, 1254, 1728}},
1272 {640, {1280, 1393, 1920}},
1273 {640, {1280, 1394, 1920}}
1277 ac3_type_find (GstTypeFind * tf, gpointer unused)
1279 DataScanCtx c = { 0, NULL, 0 };
1281 /* Search for an ac3 frame; not neccesarily right at the start, but give it
1282 * a lower probability if not found right at the start. Check that the
1283 * frame is followed by a second frame at the expected offset.
1284 * We could also check the two ac3 CRCs, but we don't do that right now */
1285 while (c.offset < 1024) {
1286 if (G_UNLIKELY (!data_scan_ctx_ensure_data (tf, &c, 5)))
1289 if (c.data[0] == 0x0b && c.data[1] == 0x77) {
1290 guint bsid = c.data[5] >> 3;
1294 guint fscod = c.data[4] >> 6;
1295 guint frmsizecod = c.data[4] & 0x3f;
1297 if (fscod < 3 && frmsizecod < 38) {
1298 DataScanCtx c_next = c;
1301 frame_size = ac3_frmsizecod_tbl[frmsizecod].frm_size[fscod];
1302 GST_LOG ("possible AC3 frame sync at offset %"
1303 G_GUINT64_FORMAT ", size=%u", c.offset, frame_size);
1304 if (data_scan_ctx_ensure_data (tf, &c_next, (frame_size * 2) + 5)) {
1305 data_scan_ctx_advance (tf, &c_next, frame_size * 2);
1307 if (c_next.data[0] == 0x0b && c_next.data[1] == 0x77) {
1308 fscod = c_next.data[4] >> 6;
1309 frmsizecod = c_next.data[4] & 0x3f;
1311 if (fscod < 3 && frmsizecod < 38) {
1312 GstTypeFindProbability prob;
1314 GST_LOG ("found second AC3 frame (size=%u), looks good",
1315 ac3_frmsizecod_tbl[frmsizecod].frm_size[fscod]);
1317 prob = GST_TYPE_FIND_MAXIMUM;
1319 prob = GST_TYPE_FIND_NEARLY_CERTAIN;
1321 gst_type_find_suggest (tf, prob, AC3_CAPS);
1325 GST_LOG ("no second AC3 frame found, false sync");
1329 } else if (bsid <= 16 && bsid > 10) {
1331 DataScanCtx c_next = c;
1334 frame_size = (((c.data[2] & 0x07) << 8) + c.data[3]) + 1;
1335 GST_LOG ("possible E-AC3 frame sync at offset %"
1336 G_GUINT64_FORMAT ", size=%u", c.offset, frame_size);
1337 if (data_scan_ctx_ensure_data (tf, &c_next, (frame_size * 2) + 5)) {
1338 data_scan_ctx_advance (tf, &c_next, frame_size * 2);
1340 if (c_next.data[0] == 0x0b && c_next.data[1] == 0x77) {
1341 GstTypeFindProbability prob;
1343 GST_LOG ("found second E-AC3 frame, looks good");
1345 prob = GST_TYPE_FIND_MAXIMUM;
1347 prob = GST_TYPE_FIND_NEARLY_CERTAIN;
1349 gst_type_find_suggest (tf, prob, EAC3_CAPS);
1352 GST_LOG ("no second E-AC3 frame found, false sync");
1356 GST_LOG ("invalid AC3 BSID: %u", bsid);
1359 data_scan_ctx_advance (tf, &c, 1);
1363 /*** audio/x-dts ***/
1364 static GstStaticCaps dts_caps = GST_STATIC_CAPS ("audio/x-dts");
1365 #define DTS_CAPS (gst_static_caps_get (&dts_caps))
1366 #define DTS_MIN_FRAMESIZE 96
1367 #define DTS_MAX_FRAMESIZE 18725 /* 16384*16/14 */
1370 dts_parse_frame_header (DataScanCtx * c, guint * frame_size,
1371 guint * sample_rate, guint * channels, guint * depth, guint * endianness)
1373 static const int sample_rates[16] = { 0, 8000, 16000, 32000, 0, 0, 11025,
1374 22050, 44100, 0, 0, 12000, 24000, 48000, 96000, 192000
1376 static const guint8 channels_table[16] = { 1, 2, 2, 2, 2, 3, 3, 4, 4, 5,
1381 guint num_blocks, chans, lfe, i;
1383 marker = GST_READ_UINT32_BE (c->data);
1385 /* raw big endian or 14-bit big endian */
1386 if (marker == 0x7FFE8001 || marker == 0x1FFFE800) {
1387 *endianness = G_BIG_ENDIAN;
1388 for (i = 0; i < G_N_ELEMENTS (hdr); ++i)
1389 hdr[i] = GST_READ_UINT16_BE (c->data + (i * sizeof (guint16)));
1391 /* raw little endian or 14-bit little endian */
1392 if (marker == 0xFE7F0180 || marker == 0xFF1F00E8) {
1393 *endianness = G_LITTLE_ENDIAN;
1394 for (i = 0; i < G_N_ELEMENTS (hdr); ++i)
1395 hdr[i] = GST_READ_UINT16_LE (c->data + (i * sizeof (guint16)));
1400 GST_LOG ("dts sync marker 0x%08x at offset %u", marker, (guint) c->offset);
1403 if (marker == 0x1FFFE800 || marker == 0xFF1F00E8) {
1404 if ((hdr[2] & 0xFFF0) != 0x07F0)
1406 /* discard top 2 bits (2 void), shift in 2 */
1407 hdr[0] = (hdr[0] << 2) | ((hdr[1] >> 12) & 0x0003);
1408 /* discard top 4 bits (2 void, 2 shifted into hdr[0]), shift in 4 etc. */
1409 hdr[1] = (hdr[1] << 4) | ((hdr[2] >> 10) & 0x000F);
1410 hdr[2] = (hdr[2] << 6) | ((hdr[3] >> 8) & 0x003F);
1411 hdr[3] = (hdr[3] << 8) | ((hdr[4] >> 6) & 0x00FF);
1412 hdr[4] = (hdr[4] << 10) | ((hdr[5] >> 4) & 0x03FF);
1413 hdr[5] = (hdr[5] << 12) | ((hdr[6] >> 2) & 0x0FFF);
1414 hdr[6] = (hdr[6] << 14) | ((hdr[7] >> 0) & 0x3FFF);
1415 g_assert (hdr[0] == 0x7FFE && hdr[1] == 0x8001);
1421 GST_LOG ("frame header: %04x%04x%04x%04x", hdr[2], hdr[3], hdr[4], hdr[5]);
1423 num_blocks = (hdr[2] >> 2) & 0x7F;
1424 *frame_size = (((hdr[2] & 0x03) << 12) | (hdr[3] >> 4)) + 1;
1425 chans = ((hdr[3] & 0x0F) << 2) | (hdr[4] >> 14);
1426 *sample_rate = sample_rates[(hdr[4] >> 10) & 0x0F];
1427 lfe = (hdr[5] >> 9) & 0x03;
1429 if (num_blocks < 5 || *frame_size < 96 || *sample_rate == 0)
1432 if (marker == 0x1FFFE800 || marker == 0xFF1F00E8)
1433 *frame_size = (*frame_size * 16) / 14; /* FIXME: round up? */
1435 if (chans < G_N_ELEMENTS (channels_table))
1436 *channels = channels_table[chans] + ((lfe) ? 1 : 0);
1444 dts_type_find (GstTypeFind * tf, gpointer unused)
1446 DataScanCtx c = { 0, NULL, 0 };
1448 /* Search for an dts frame; not neccesarily right at the start, but give it
1449 * a lower probability if not found right at the start. Check that the
1450 * frame is followed by a second frame at the expected offset. */
1451 while (c.offset <= DTS_MAX_FRAMESIZE) {
1452 guint frame_size = 0, rate = 0, chans = 0, depth = 0, endianness = 0;
1454 if (G_UNLIKELY (!data_scan_ctx_ensure_data (tf, &c, DTS_MIN_FRAMESIZE)))
1457 if (G_UNLIKELY (dts_parse_frame_header (&c, &frame_size, &rate, &chans,
1458 &depth, &endianness))) {
1459 GstTypeFindProbability prob;
1462 prob = (c.offset == 0) ? GST_TYPE_FIND_LIKELY : GST_TYPE_FIND_POSSIBLE;
1464 /* check for second frame sync */
1466 data_scan_ctx_advance (tf, &next_c, frame_size);
1467 if (data_scan_ctx_ensure_data (tf, &next_c, 4)) {
1468 GST_LOG ("frame size: %u 0x%04x", frame_size, frame_size);
1469 GST_MEMDUMP ("second frame sync", next_c.data, 4);
1470 if (GST_READ_UINT32_BE (c.data) == GST_READ_UINT32_BE (next_c.data))
1471 prob = GST_TYPE_FIND_MAXIMUM;
1475 gst_type_find_suggest_simple (tf, prob, "audio/x-dts",
1476 "rate", G_TYPE_INT, rate, "channels", G_TYPE_INT, chans,
1477 "depth", G_TYPE_INT, depth, "endianness", G_TYPE_INT, endianness,
1478 "framed", G_TYPE_BOOLEAN, FALSE, NULL);
1480 gst_type_find_suggest_simple (tf, prob, "audio/x-dts",
1481 "rate", G_TYPE_INT, rate, "depth", G_TYPE_INT, depth,
1482 "endianness", G_TYPE_INT, endianness,
1483 "framed", G_TYPE_BOOLEAN, FALSE, NULL);
1489 data_scan_ctx_advance (tf, &c, 1);
1495 /* can only be detected by using the extension, in which case we use the default
1497 static GstStaticCaps gsm_caps =
1498 GST_STATIC_CAPS ("audio/x-gsm, rate=8000, channels=1");
1500 #define GSM_CAPS (gst_static_caps_get(&gsm_caps))
1504 static GstStaticCaps wavpack_caps =
1505 GST_STATIC_CAPS ("audio/x-wavpack, framed = (boolean) false");
1507 #define WAVPACK_CAPS (gst_static_caps_get(&wavpack_caps))
1509 static GstStaticCaps wavpack_correction_caps =
1510 GST_STATIC_CAPS ("audio/x-wavpack-correction, framed = (boolean) false");
1512 #define WAVPACK_CORRECTION_CAPS (gst_static_caps_get(&wavpack_correction_caps))
1515 wavpack_type_find (GstTypeFind * tf, gpointer unused)
1521 data = gst_type_find_peek (tf, 0, 32);
1525 if (data[0] != 'w' || data[1] != 'v' || data[2] != 'p' || data[3] != 'k')
1528 /* Note: wavpack blocks can be fairly large (easily 60-110k), possibly
1529 * larger than the max. limits imposed by certain typefinding elements
1530 * like id3demux or apedemux, so typefinding is most likely only going to
1531 * work in pull-mode */
1532 blocksize = GST_READ_UINT32_LE (data + 4);
1533 GST_LOG ("wavpack header, blocksize=0x%04x", blocksize);
1535 while (offset < 32 + blocksize) {
1538 /* get chunk header */
1539 GST_LOG ("peeking at chunk at offset 0x%04x", (guint) offset);
1540 data = gst_type_find_peek (tf, offset, 4);
1543 sublen = ((guint32) data[1]) << 1;
1544 if (data[0] & 0x80) {
1545 sublen |= (((guint32) data[2]) << 9) | (((guint32) data[3]) << 17);
1546 sublen += 1 + 3; /* id + length */
1548 sublen += 1 + 1; /* id + length */
1550 if (sublen > blocksize - offset + 32) {
1551 GST_LOG ("chunk length too big (%u > %" G_GUINT64_FORMAT ")", sublen,
1552 blocksize - offset);
1555 if ((data[0] & 0x20) == 0) {
1556 switch (data[0] & 0x0f) {
1557 case 0xa: /* ID_WV_BITSTREAM */
1558 case 0xc: /* ID_WVX_BITSTREAM */
1559 gst_type_find_suggest (tf, GST_TYPE_FIND_LIKELY, WAVPACK_CAPS);
1561 case 0xb: /* ID_WVC_BITSTREAM */
1562 gst_type_find_suggest (tf, GST_TYPE_FIND_LIKELY,
1563 WAVPACK_CORRECTION_CAPS);
1573 /*** application/postscrip ***/
1574 static GstStaticCaps postscript_caps =
1575 GST_STATIC_CAPS ("application/postscript");
1577 #define POSTSCRIPT_CAPS (gst_static_caps_get(&postscript_caps))
1580 postscript_type_find (GstTypeFind * tf, gpointer unused)
1582 guint8 *data = gst_type_find_peek (tf, 0, 3);
1586 if (data[0] == 0x04)
1588 if (data[0] == '%' && data[1] == '!')
1589 gst_type_find_suggest (tf, GST_TYPE_FIND_POSSIBLE, POSTSCRIPT_CAPS);
1593 /*** image/svg+xml ***/
1594 static GstStaticCaps svg_caps = GST_STATIC_CAPS ("image/svg+xml");
1596 #define SVG_CAPS (gst_static_caps_get(&svg_caps))
1599 svg_type_find (GstTypeFind * tf, gpointer unused)
1601 static const gchar svg_doctype[] = "!DOCTYPE svg";
1602 static const gchar svg_tag[] = "<svg";
1603 DataScanCtx c = { 0, NULL, 0 };
1605 while (c.offset <= 1024) {
1606 if (G_UNLIKELY (!data_scan_ctx_ensure_data (tf, &c, 12)))
1609 if (memcmp (svg_doctype, c.data, 12) == 0) {
1610 gst_type_find_suggest (tf, GST_TYPE_FIND_MAXIMUM, SVG_CAPS);
1612 } else if (memcmp (svg_tag, c.data, 4) == 0) {
1613 gst_type_find_suggest (tf, GST_TYPE_FIND_LIKELY, SVG_CAPS);
1616 data_scan_ctx_advance (tf, &c, 1);
1620 /*** multipart/x-mixed-replace mimestream ***/
1622 static GstStaticCaps multipart_caps =
1623 GST_STATIC_CAPS ("multipart/x-mixed-replace");
1624 #define MULTIPART_CAPS gst_static_caps_get(&multipart_caps)
1626 /* multipart/x-mixed replace is:
1627 * <maybe some whitespace>--<some ascii chars>[\r]\n
1628 * <more ascii chars>[\r]\nContent-type:<more ascii>[\r]\n */
1630 multipart_type_find (GstTypeFind * tf, gpointer unused)
1635 #define MULTIPART_MAX_BOUNDARY_OFFSET 16
1636 data = gst_type_find_peek (tf, 0, MULTIPART_MAX_BOUNDARY_OFFSET);
1641 x - data < MULTIPART_MAX_BOUNDARY_OFFSET - 2 && g_ascii_isspace (*x);
1643 if (x[0] != '-' || x[1] != '-')
1646 /* Could be okay, peek what should be enough for a complete header */
1647 #define MULTIPART_MAX_HEADER_SIZE 256
1648 data = gst_type_find_peek (tf, 0, MULTIPART_MAX_HEADER_SIZE);
1652 for (x = data; x - data < MULTIPART_MAX_HEADER_SIZE - 14; x++) {
1653 if (!isascii (*x)) {
1657 !g_ascii_strncasecmp ("content-type:", (gchar *) x + 1, 13)) {
1658 gst_type_find_suggest (tf, GST_TYPE_FIND_MAXIMUM, MULTIPART_CAPS);
1664 /*** video/mpeg systemstream ***/
1665 static GstStaticCaps mpeg_sys_caps = GST_STATIC_CAPS ("video/mpeg, "
1666 "systemstream = (boolean) true, mpegversion = (int) [ 1, 2 ]");
1668 #define MPEG_SYS_CAPS gst_static_caps_get(&mpeg_sys_caps)
1669 #define IS_MPEG_HEADER(data) (G_UNLIKELY((((guint8 *)(data))[0] == 0x00) && \
1670 (((guint8 *)(data))[1] == 0x00) && \
1671 (((guint8 *)(data))[2] == 0x01)))
1673 #define IS_MPEG_PACK_CODE(b) ((b) == 0xBA)
1674 #define IS_MPEG_SYS_CODE(b) ((b) == 0xBB)
1675 #define IS_MPEG_PACK_HEADER(data) (IS_MPEG_HEADER (data) && \
1676 IS_MPEG_PACK_CODE (((guint8 *)(data))[3]))
1678 #define IS_MPEG_PES_CODE(b) (((b) & 0xF0) == 0xE0 || ((b) & 0xF0) == 0xC0 || \
1680 #define IS_MPEG_PES_HEADER(data) (IS_MPEG_HEADER (data) && \
1681 IS_MPEG_PES_CODE (((guint8 *)(data))[3]))
1683 #define MPEG2_MAX_PROBE_LENGTH (128 * 1024) /* 128kB should be 64 packs of the
1684 * most common 2kB pack size. */
1686 #define MPEG2_MIN_SYS_HEADERS 2
1687 #define MPEG2_MAX_SYS_HEADERS 5
1690 mpeg_sys_is_valid_pack (GstTypeFind * tf, const guint8 * data, guint len,
1693 /* Check the pack header @ offset for validity, assuming that the 4 byte header
1694 * itself has already been checked. */
1700 /* Check marker bits */
1701 if ((data[4] & 0xC4) == 0x44) {
1706 if ((data[6] & 0x04) != 0x04 ||
1707 (data[8] & 0x04) != 0x04 ||
1708 (data[9] & 0x01) != 0x01 || (data[12] & 0x03) != 0x03)
1711 stuff_len = data[13] & 0x07;
1713 /* Check the following header bytes, if we can */
1714 if ((14 + stuff_len + 4) <= len) {
1715 if (!IS_MPEG_HEADER (data + 14 + stuff_len))
1719 *pack_size = 14 + stuff_len;
1721 } else if ((data[4] & 0xF1) == 0x21) {
1723 if ((data[6] & 0x01) != 0x01 ||
1724 (data[8] & 0x01) != 0x01 ||
1725 (data[9] & 0x80) != 0x80 || (data[11] & 0x01) != 0x01)
1728 /* Check the following header bytes, if we can */
1729 if ((12 + 4) <= len) {
1730 if (!IS_MPEG_HEADER (data + 12))
1742 mpeg_sys_is_valid_pes (GstTypeFind * tf, guint8 * data, guint len,
1745 guint pes_packet_len;
1747 /* Check the PES header at the given position, assuming the header code itself
1748 * was already checked */
1752 /* For MPEG Program streams, unbounded PES is not allowed, so we must have a
1753 * valid length present */
1754 pes_packet_len = GST_READ_UINT16_BE (data + 4);
1755 if (pes_packet_len == 0)
1758 /* Check the following header, if we can */
1759 if (6 + pes_packet_len + 4 <= len) {
1760 if (!IS_MPEG_HEADER (data + 6 + pes_packet_len))
1765 *pack_size = 6 + pes_packet_len;
1770 mpeg_sys_is_valid_sys (GstTypeFind * tf, guint8 * data, guint len,
1775 /* Check the System header at the given position, assuming the header code itself
1776 * was already checked */
1779 sys_hdr_len = GST_READ_UINT16_BE (data + 4);
1780 if (sys_hdr_len < 6)
1783 /* Check the following header, if we can */
1784 if (6 + sys_hdr_len + 4 <= len) {
1785 if (!IS_MPEG_HEADER (data + 6 + sys_hdr_len))
1790 *pack_size = 6 + sys_hdr_len;
1795 /* calculation of possibility to identify random data as mpeg systemstream:
1796 * bits that must match in header detection: 32 (or more)
1797 * chance that random data is identifed: 1/2^32
1798 * chance that MPEG2_MIN_PACK_HEADERS headers are identified:
1799 * 1/2^(32*MPEG2_MIN_PACK_HEADERS)
1800 * chance that this happens in MPEG2_MAX_PROBE_LENGTH bytes:
1801 * 1-(1+1/2^(32*MPEG2_MIN_PACK_HEADERS)^MPEG2_MAX_PROBE_LENGTH)
1802 * for current values:
1803 * 1-(1+1/2^(32*4)^101024)
1805 * Since we also check marker bits and pes packet lengths, this probability is a
1806 * very coarse upper bound.
1809 mpeg_sys_type_find (GstTypeFind * tf, gpointer unused)
1811 guint8 *data, *data0, *first_sync, *end;
1812 gint mpegversion = 0;
1813 guint pack_headers = 0;
1814 guint pes_headers = 0;
1816 guint since_last_sync = 0;
1817 guint32 sync_word = 0xffffffff;
1822 len = MPEG2_MAX_PROBE_LENGTH;
1825 data = gst_type_find_peek (tf, 0, 5 + len);
1826 } while (data == NULL && len >= 32);
1838 while (data < end) {
1840 if (sync_word == 0x00000100) {
1841 /* Found potential sync word */
1842 if (first_sync == NULL)
1843 first_sync = data - 3;
1845 if (since_last_sync > 4) {
1846 /* If more than 4 bytes since the last sync word, reset our counters,
1847 * as we're only interested in counting contiguous packets */
1848 pes_headers = pack_headers = 0;
1852 if (IS_MPEG_PACK_CODE (data[0])) {
1853 if ((data[1] & 0xC0) == 0x40) {
1856 } else if ((data[1] & 0xF0) == 0x20) {
1859 if (mpegversion != 0 &&
1860 mpeg_sys_is_valid_pack (tf, data - 3, end - data + 3, &pack_size)) {
1863 } else if (IS_MPEG_PES_CODE (data[0])) {
1865 if (mpeg_sys_is_valid_pes (tf, data - 3, end - data + 3, &pack_size)) {
1867 if (mpegversion == 0)
1870 } else if (IS_MPEG_SYS_CODE (data[0])) {
1871 if (mpeg_sys_is_valid_sys (tf, data - 3, end - data + 3, &pack_size)) {
1876 /* If we found a packet with a known size, skip the bytes in it and loop
1877 * around to check the next packet. */
1878 if (pack_size != 0) {
1879 data += pack_size - 3;
1880 sync_word = 0xffffffff;
1881 since_last_sync = 0;
1886 sync_word |= data[0];
1890 /* If we have found MAX headers, and *some* were pes headers (pack headers
1891 * are optional in an mpeg system stream) then return our high-probability
1893 if (pes_headers > 0 && (pack_headers + pes_headers) > MPEG2_MAX_SYS_HEADERS)
1897 /* If we at least saw MIN headers, and *some* were pes headers (pack headers
1898 * are optional in an mpeg system stream) then return a lower-probability
1900 if (pes_headers > 0 && (pack_headers + pes_headers) > MPEG2_MIN_SYS_HEADERS)
1908 prob = GST_TYPE_FIND_POSSIBLE + (10 * (pack_headers + pes_headers));
1909 prob = MIN (prob, GST_TYPE_FIND_MAXIMUM);
1911 /* lower probability if the first packet wasn't right at the start */
1912 if (data0 != first_sync && prob >= 10)
1915 GST_LOG ("Suggesting MPEG %d system stream, %d packs, %d pes, prob %u%%\n",
1916 mpegversion, pack_headers, pes_headers, prob);
1918 gst_type_find_suggest_simple (tf, prob, "video/mpeg",
1919 "systemstream", G_TYPE_BOOLEAN, TRUE,
1920 "mpegversion", G_TYPE_INT, mpegversion, NULL);
1924 /*** video/mpegts Transport Stream ***/
1925 static GstStaticCaps mpegts_caps = GST_STATIC_CAPS ("video/mpegts, "
1926 "systemstream = (boolean) true, packetsize = (int) [ 188, 208 ]");
1927 #define MPEGTS_CAPS gst_static_caps_get(&mpegts_caps)
1929 #define GST_MPEGTS_TYPEFIND_MIN_HEADERS 4
1930 #define GST_MPEGTS_TYPEFIND_MAX_HEADERS 10
1931 #define GST_MPEGTS_MAX_PACKET_SIZE 208
1932 #define GST_MPEGTS_TYPEFIND_SYNC_SIZE \
1933 (GST_MPEGTS_TYPEFIND_MIN_HEADERS * GST_MPEGTS_MAX_PACKET_SIZE)
1934 #define GST_MPEGTS_TYPEFIND_MAX_SYNC \
1935 (GST_MPEGTS_TYPEFIND_MAX_HEADERS * GST_MPEGTS_MAX_PACKET_SIZE)
1936 #define GST_MPEGTS_TYPEFIND_SCAN_LENGTH \
1937 (GST_MPEGTS_TYPEFIND_MAX_SYNC * 4)
1939 #define MPEGTS_HDR_SIZE 4
1940 /* Check for sync byte, error_indicator == 0 and packet has payload */
1941 #define IS_MPEGTS_HEADER(data) (((data)[0] == 0x47) && \
1942 (((data)[1] & 0x80) == 0x00) && \
1943 (((data)[3] & 0x30) != 0x00))
1945 /* Helper function to search ahead at intervals of packet_size for mpegts
1948 mpeg_ts_probe_headers (GstTypeFind * tf, guint64 offset, gint packet_size)
1950 /* We always enter this function having found at least one header already */
1952 guint8 *data = NULL;
1954 GST_LOG ("looking for mpeg-ts packets of size %u", packet_size);
1955 while (found < GST_MPEGTS_TYPEFIND_MAX_HEADERS) {
1956 offset += packet_size;
1958 data = gst_type_find_peek (tf, offset, MPEGTS_HDR_SIZE);
1959 if (data == NULL || !IS_MPEGTS_HEADER (data))
1963 GST_LOG ("mpeg-ts sync #%2d at offset %" G_GUINT64_FORMAT, found, offset);
1969 /* Try and detect at least 4 packets in at most 10 packets worth of
1970 * data. Need to try several possible packet sizes */
1972 mpeg_ts_type_find (GstTypeFind * tf, gpointer unused)
1974 /* TS packet sizes to test: normal, DVHS packet size and
1975 * FEC with 16 or 20 byte codes packet size. */
1976 const gint pack_sizes[] = { 188, 192, 204, 208 };
1978 guint8 *data = NULL;
1980 guint64 skipped = 0;
1982 while (skipped < GST_MPEGTS_TYPEFIND_SCAN_LENGTH) {
1983 if (size < MPEGTS_HDR_SIZE) {
1984 data = gst_type_find_peek (tf, skipped, GST_MPEGTS_TYPEFIND_SYNC_SIZE);
1987 size = GST_MPEGTS_TYPEFIND_SYNC_SIZE;
1990 /* Have at least MPEGTS_HDR_SIZE bytes at this point */
1991 if (IS_MPEGTS_HEADER (data)) {
1994 GST_LOG ("possible mpeg-ts sync at offset %" G_GUINT64_FORMAT, skipped);
1996 for (p = 0; p < G_N_ELEMENTS (pack_sizes); p++) {
1999 /* Probe ahead at size pack_sizes[p] */
2000 found = mpeg_ts_probe_headers (tf, skipped, pack_sizes[p]);
2001 if (found >= GST_MPEGTS_TYPEFIND_MIN_HEADERS) {
2004 /* found at least 4 headers. 10 headers = MAXIMUM probability.
2005 * Arbitrarily, I assigned 10% probability for each header we
2006 * found, 40% -> 100% */
2007 probability = MIN (10 * found, GST_TYPE_FIND_MAXIMUM);
2009 gst_type_find_suggest_simple (tf, probability, "video/mpegts",
2010 "systemstream", G_TYPE_BOOLEAN, TRUE,
2011 "packetsize", G_TYPE_INT, pack_sizes[p], NULL);
2022 #define GST_MPEGVID_TYPEFIND_TRY_PICTURES 6
2023 #define GST_MPEGVID_TYPEFIND_TRY_SYNC (100 * 1024) /* 100 kB */
2025 /* Scan ahead a maximum of max_extra_offset bytes until the next IS_MPEG_HEADER
2026 * offset. After the call, offset will be after the 0x000001, i.e. at the 4th
2027 * byte of the MPEG header. Returns TRUE if a header was found, FALSE if not.
2030 mpeg_find_next_header (GstTypeFind * tf, DataScanCtx * c,
2031 guint64 max_extra_offset)
2033 guint64 extra_offset;
2035 for (extra_offset = 0; extra_offset <= max_extra_offset; ++extra_offset) {
2036 if (!data_scan_ctx_ensure_data (tf, c, 4))
2038 if (IS_MPEG_HEADER (c->data)) {
2039 data_scan_ctx_advance (tf, c, 3);
2042 data_scan_ctx_advance (tf, c, 1);
2047 /*** video/mpeg MPEG-4 elementary video stream ***/
2049 static GstStaticCaps mpeg4_video_caps = GST_STATIC_CAPS ("video/mpeg, "
2050 "systemstream=(boolean)false, mpegversion=4, parsed=(boolean)false");
2051 #define MPEG4_VIDEO_CAPS gst_static_caps_get(&mpeg4_video_caps)
2054 * This typefind is based on the elementary video header defined in
2055 * http://xhelmboyx.tripod.com/formats/mpeg-layout.txt
2056 * In addition, it allows the visual object sequence header to be
2057 * absent, and even the VOS header to be absent. In the latter case,
2058 * a number of VOPs have to be present.
2061 mpeg4_video_type_find (GstTypeFind * tf, gpointer unused)
2063 DataScanCtx c = { 0, NULL, 0 };
2064 gboolean seen_vios_at_0 = FALSE;
2065 gboolean seen_vios = FALSE;
2066 gboolean seen_vos = FALSE;
2067 gboolean seen_vol = FALSE;
2068 guint num_vop_headers = 0;
2071 while (c.offset < GST_MPEGVID_TYPEFIND_TRY_SYNC) {
2072 if (num_vop_headers >= GST_MPEGVID_TYPEFIND_TRY_PICTURES)
2075 if (!mpeg_find_next_header (tf, &c,
2076 GST_MPEGVID_TYPEFIND_TRY_SYNC - c.offset))
2081 /* visual_object_sequence_start_code */
2084 break; /* Terminate at second vios */
2086 seen_vios_at_0 = TRUE;
2088 data_scan_ctx_advance (tf, &c, 2);
2089 if (!mpeg_find_next_header (tf, &c, 0))
2094 /* Optional metadata */
2096 if (!mpeg_find_next_header (tf, &c, 24))
2100 /* visual_object_start_code (consider it optional) */
2102 data_scan_ctx_advance (tf, &c, 2);
2103 /* may contain ID marker and YUV clamping */
2104 if (!mpeg_find_next_header (tf, &c, 7))
2110 /* video_object_start_code */
2113 break; /* Terminate at second vos */
2115 data_scan_ctx_advance (tf, &c, 2);
2119 /* video_object_layer_start_code */
2120 if (sc >= 0x20 && sc <= 0x2F) {
2122 data_scan_ctx_advance (tf, &c, 5);
2126 /* video_object_plane_start_code */
2129 data_scan_ctx_advance (tf, &c, 2);
2133 /* Unknown start code. */
2136 if (num_vop_headers > 0 || seen_vol) {
2137 GstTypeFindProbability probability = 0;
2139 GST_LOG ("Found %d pictures, vios: %d, vos:%d, vol:%d", num_vop_headers,
2140 seen_vios, seen_vos, seen_vol);
2142 if (num_vop_headers >= GST_MPEGVID_TYPEFIND_TRY_PICTURES && seen_vios_at_0
2143 && seen_vos && seen_vol)
2144 probability = GST_TYPE_FIND_MAXIMUM - 1;
2145 else if (num_vop_headers >= GST_MPEGVID_TYPEFIND_TRY_PICTURES && seen_vios
2146 && seen_vos && seen_vol)
2147 probability = GST_TYPE_FIND_NEARLY_CERTAIN - 1;
2148 else if (seen_vios_at_0 && seen_vos && seen_vol)
2149 probability = GST_TYPE_FIND_NEARLY_CERTAIN - 6;
2150 else if (num_vop_headers >= GST_MPEGVID_TYPEFIND_TRY_PICTURES && seen_vos
2152 probability = GST_TYPE_FIND_NEARLY_CERTAIN - 6;
2153 else if (num_vop_headers >= GST_MPEGVID_TYPEFIND_TRY_PICTURES && seen_vol)
2154 probability = GST_TYPE_FIND_NEARLY_CERTAIN - 9;
2155 else if (num_vop_headers >= GST_MPEGVID_TYPEFIND_TRY_PICTURES)
2156 probability = GST_TYPE_FIND_LIKELY - 1;
2157 else if (num_vop_headers > 2 && seen_vios && seen_vos && seen_vol)
2158 probability = GST_TYPE_FIND_LIKELY - 9;
2159 else if (seen_vios && seen_vos && seen_vol)
2160 probability = GST_TYPE_FIND_LIKELY - 20;
2161 else if (num_vop_headers > 0 && seen_vos && seen_vol)
2162 probability = GST_TYPE_FIND_POSSIBLE;
2163 else if (num_vop_headers > 0)
2164 probability = GST_TYPE_FIND_POSSIBLE - 10;
2165 else if (seen_vos && seen_vol)
2166 probability = GST_TYPE_FIND_POSSIBLE - 20;
2168 gst_type_find_suggest (tf, probability, MPEG4_VIDEO_CAPS);
2172 /*** video/x-h263 H263 video stream ***/
2173 static GstStaticCaps h263_video_caps = GST_STATIC_CAPS ("video/x-h263");
2175 #define H263_VIDEO_CAPS gst_static_caps_get(&h263_video_caps)
2177 #define H263_MAX_PROBE_LENGTH (128 * 1024)
2180 h263_video_type_find (GstTypeFind * tf, gpointer unused)
2182 DataScanCtx c = { 0, NULL, 0 };
2190 while (c.offset < H263_MAX_PROBE_LENGTH) {
2191 if (G_UNLIKELY (!data_scan_ctx_ensure_data (tf, &c, 4)))
2194 /* Find the picture start code */
2195 data = (data << 8) + c.data[0];
2196 psc = data & G_GUINT64_CONSTANT (0xfffffc0000);
2197 if (psc == 0x800000) {
2200 tr = (data & 0x3fc) >> 2;
2204 /* Now that we have a Valid PSC, check if we also have a valid PTYPE and
2205 the Source Format, which should range between 1 and 5 */
2206 if (((tr >> 6) == 0x2) && (format > 0 && format < 6))
2211 /* FIXME: maybe bail out early if we get mostly bad syncs ? */
2214 data_scan_ctx_advance (tf, &c, 1);
2217 if (good > 0 && bad == 0)
2218 gst_type_find_suggest (tf, GST_TYPE_FIND_LIKELY, H263_VIDEO_CAPS);
2219 else if (good > 2 * bad)
2220 gst_type_find_suggest (tf, GST_TYPE_FIND_POSSIBLE, H263_VIDEO_CAPS);
2225 /*** video/x-h264 H264 elementary video stream ***/
2227 static GstStaticCaps h264_video_caps =
2228 GST_STATIC_CAPS ("video/x-h264,stream-format=byte-stream");
2230 #define H264_VIDEO_CAPS gst_static_caps_get(&h264_video_caps)
2232 #define H264_MAX_PROBE_LENGTH (128 * 1024) /* 128kB for HD should be enough. */
2235 h264_video_type_find (GstTypeFind * tf, gpointer unused)
2237 DataScanCtx c = { 0, NULL, 0 };
2239 /* Stream consists of: a series of sync codes (00 00 00 01) followed
2246 while (c.offset < H264_MAX_PROBE_LENGTH) {
2247 if (G_UNLIKELY (!data_scan_ctx_ensure_data (tf, &c, 4)))
2250 if (IS_MPEG_HEADER (c.data)) {
2251 nut = c.data[3] & 0x9f; /* forbiden_zero_bit | nal_unit_type */
2252 ref = c.data[3] & 0x60; /* nal_ref_idc */
2254 /* if forbiden bit is different to 0 won't be h264 */
2260 /* collect statistics about the NAL types */
2261 if ((nut >= 1 && nut <= 13) || nut == 19) {
2262 if ((nut == 5 && ref == 0) ||
2263 ((nut == 6 || (nut >= 9 && nut <= 12)) && ref != 0)) {
2268 } else if (nut >= 14 && nut <= 33) {
2270 /* Theoretically these are good, since if they exist in the
2271 stream it merely means that a newer backwards-compatible
2272 h.264 stream. But we should be identifying that separately. */
2275 /* unspecified, application specific */
2276 /* don't consider these bad */
2279 GST_DEBUG ("good %d bad %d", good, bad);
2281 if (good >= 10 && bad < 4) {
2282 gst_type_find_suggest (tf, GST_TYPE_FIND_LIKELY, H264_VIDEO_CAPS);
2286 data_scan_ctx_advance (tf, &c, 4);
2288 data_scan_ctx_advance (tf, &c, 1);
2291 if (good >= 2 && bad < 1) {
2292 gst_type_find_suggest (tf, GST_TYPE_FIND_POSSIBLE, H264_VIDEO_CAPS);
2297 /*** video/mpeg video stream ***/
2299 static GstStaticCaps mpeg_video_caps = GST_STATIC_CAPS ("video/mpeg, "
2300 "systemstream = (boolean) false");
2301 #define MPEG_VIDEO_CAPS gst_static_caps_get(&mpeg_video_caps)
2304 * Idea is the same as MPEG system stream typefinding: We check each
2305 * byte of the stream to see if - from that point on - the stream
2306 * matches a predefined set of marker bits as defined in the MPEG
2309 * I'm sure someone will do a chance calculation here too.
2313 mpeg_video_stream_type_find (GstTypeFind * tf, gpointer unused)
2315 DataScanCtx c = { 0, NULL, 0 };
2316 gboolean seen_seq_at_0 = FALSE;
2317 gboolean seen_seq = FALSE;
2318 gboolean seen_gop = FALSE;
2319 guint64 last_pic_offset = 0;
2320 guint num_pic_headers = 0;
2323 while (c.offset < GST_MPEGVID_TYPEFIND_TRY_SYNC) {
2324 if (found >= GST_MPEGVID_TYPEFIND_TRY_PICTURES)
2327 if (!data_scan_ctx_ensure_data (tf, &c, 5))
2330 if (!IS_MPEG_HEADER (c.data))
2333 /* a pack header indicates that this isn't an elementary stream */
2334 if (c.data[3] == 0xBA && mpeg_sys_is_valid_pack (tf, c.data, c.size, NULL))
2337 /* do we have a sequence header? */
2338 if (c.data[3] == 0xB3) {
2339 seen_seq_at_0 = seen_seq_at_0 || (c.offset == 0);
2341 data_scan_ctx_advance (tf, &c, 4 + 8);
2345 /* or a GOP header */
2346 if (c.data[3] == 0xB8) {
2348 data_scan_ctx_advance (tf, &c, 8);
2352 /* but what we'd really like to see is a picture header */
2353 if (c.data[3] == 0x00) {
2355 last_pic_offset = c.offset;
2356 data_scan_ctx_advance (tf, &c, 8);
2360 /* ... each followed by a slice header with slice_vertical_pos=1 that's
2361 * not too far away from the previously seen picture header. */
2362 if (c.data[3] == 0x01 && num_pic_headers > found &&
2363 (c.offset - last_pic_offset) >= 4 &&
2364 (c.offset - last_pic_offset) <= 64) {
2365 data_scan_ctx_advance (tf, &c, 4);
2372 data_scan_ctx_advance (tf, &c, 1);
2375 if (found > 0 || seen_seq) {
2376 GstTypeFindProbability probability = 0;
2378 GST_LOG ("Found %d pictures, seq:%d, gop:%d", found, seen_seq, seen_gop);
2380 if (found >= GST_MPEGVID_TYPEFIND_TRY_PICTURES && seen_seq && seen_gop)
2381 probability = GST_TYPE_FIND_NEARLY_CERTAIN - 1;
2382 else if (found >= GST_MPEGVID_TYPEFIND_TRY_PICTURES && seen_seq)
2383 probability = GST_TYPE_FIND_NEARLY_CERTAIN - 9;
2384 else if (found >= GST_MPEGVID_TYPEFIND_TRY_PICTURES)
2385 probability = GST_TYPE_FIND_LIKELY;
2386 else if (seen_seq_at_0 && seen_gop && found > 2)
2387 probability = GST_TYPE_FIND_LIKELY - 10;
2388 else if (seen_seq && seen_gop && found > 2)
2389 probability = GST_TYPE_FIND_LIKELY - 20;
2390 else if (seen_seq_at_0 && found > 0)
2391 probability = GST_TYPE_FIND_POSSIBLE;
2392 else if (seen_seq && found > 0)
2393 probability = GST_TYPE_FIND_POSSIBLE - 5;
2395 probability = GST_TYPE_FIND_POSSIBLE - 10;
2397 probability = GST_TYPE_FIND_POSSIBLE - 20;
2399 gst_type_find_suggest_simple (tf, probability, "video/mpeg",
2400 "systemstream", G_TYPE_BOOLEAN, FALSE,
2401 "mpegversion", G_TYPE_INT, 1, NULL);
2405 /*** audio/x-aiff ***/
2407 static GstStaticCaps aiff_caps = GST_STATIC_CAPS ("audio/x-aiff");
2409 #define AIFF_CAPS gst_static_caps_get(&aiff_caps)
2411 aiff_type_find (GstTypeFind * tf, gpointer unused)
2413 guint8 *data = gst_type_find_peek (tf, 0, 4);
2415 if (data && memcmp (data, "FORM", 4) == 0) {
2417 if (memcmp (data, "AIFF", 4) == 0 || memcmp (data, "AIFC", 4) == 0)
2418 gst_type_find_suggest (tf, GST_TYPE_FIND_MAXIMUM, AIFF_CAPS);
2422 /*** audio/x-svx ***/
2424 static GstStaticCaps svx_caps = GST_STATIC_CAPS ("audio/x-svx");
2426 #define SVX_CAPS gst_static_caps_get(&svx_caps)
2428 svx_type_find (GstTypeFind * tf, gpointer unused)
2430 guint8 *data = gst_type_find_peek (tf, 0, 4);
2432 if (data && memcmp (data, "FORM", 4) == 0) {
2434 if (memcmp (data, "8SVX", 4) == 0 || memcmp (data, "16SV", 4) == 0)
2435 gst_type_find_suggest (tf, GST_TYPE_FIND_MAXIMUM, SVX_CAPS);
2439 /*** audio/x-shorten ***/
2441 static GstStaticCaps shn_caps = GST_STATIC_CAPS ("audio/x-shorten");
2443 #define SHN_CAPS gst_static_caps_get(&shn_caps)
2445 shn_type_find (GstTypeFind * tf, gpointer unused)
2447 guint8 *data = gst_type_find_peek (tf, 0, 4);
2449 if (data && memcmp (data, "ajkg", 4) == 0) {
2450 gst_type_find_suggest (tf, GST_TYPE_FIND_MAXIMUM, SHN_CAPS);
2452 data = gst_type_find_peek (tf, -8, 8);
2453 if (data && memcmp (data, "SHNAMPSK", 8) == 0) {
2454 gst_type_find_suggest (tf, GST_TYPE_FIND_MAXIMUM, SHN_CAPS);
2458 /*** application/x-ape ***/
2460 static GstStaticCaps ape_caps = GST_STATIC_CAPS ("application/x-ape");
2462 #define APE_CAPS gst_static_caps_get(&ape_caps)
2464 ape_type_find (GstTypeFind * tf, gpointer unused)
2466 guint8 *data = gst_type_find_peek (tf, 0, 4);
2468 if (data && memcmp (data, "MAC ", 4) == 0) {
2469 gst_type_find_suggest (tf, GST_TYPE_FIND_LIKELY + 10, APE_CAPS);
2473 /*** ISO FORMATS ***/
2475 /*** audio/x-m4a ***/
2477 static GstStaticCaps m4a_caps = GST_STATIC_CAPS ("audio/x-m4a");
2479 #define M4A_CAPS (gst_static_caps_get(&m4a_caps))
2481 m4a_type_find (GstTypeFind * tf, gpointer unused)
2483 guint8 *data = gst_type_find_peek (tf, 4, 8);
2485 if (data && (memcmp (data, "ftypM4A ", 8) == 0)) {
2486 gst_type_find_suggest (tf, GST_TYPE_FIND_MAXIMUM, M4A_CAPS);
2490 /*** application/x-3gp ***/
2492 /* The Q is there because variables can't start with a number. */
2493 static GstStaticCaps q3gp_caps = GST_STATIC_CAPS ("application/x-3gp");
2494 #define Q3GP_CAPS (gst_static_caps_get(&q3gp_caps))
2496 static const gchar *
2497 q3gp_type_find_get_profile (const guint8 * data)
2499 switch (GST_MAKE_FOURCC (data[0], data[1], data[2], 0)) {
2500 case GST_MAKE_FOURCC ('3', 'g', 'g', 0):
2502 case GST_MAKE_FOURCC ('3', 'g', 'p', 0):
2504 case GST_MAKE_FOURCC ('3', 'g', 's', 0):
2505 return "streaming-server";
2506 case GST_MAKE_FOURCC ('3', 'g', 'r', 0):
2507 return "progressive-download";
2515 q3gp_type_find (GstTypeFind * tf, gpointer unused)
2517 const gchar *profile;
2518 guint32 ftyp_size = 0;
2520 guint8 *data = NULL;
2522 if ((data = gst_type_find_peek (tf, 0, 12)) == NULL) {
2527 if (memcmp (data, "ftyp", 4) != 0) {
2531 /* check major brand */
2533 if ((profile = q3gp_type_find_get_profile (data))) {
2534 gst_type_find_suggest_simple (tf, GST_TYPE_FIND_MAXIMUM,
2535 "application/x-3gp", "profile", G_TYPE_STRING, profile, NULL);
2539 /* check compatible brands */
2540 if ((data = gst_type_find_peek (tf, 0, 4)) != NULL) {
2541 ftyp_size = GST_READ_UINT32_BE (data);
2543 for (offset = 16; offset < ftyp_size; offset += 4) {
2544 if ((data = gst_type_find_peek (tf, offset, 3)) == NULL) {
2547 if ((profile = q3gp_type_find_get_profile (data))) {
2548 gst_type_find_suggest_simple (tf, GST_TYPE_FIND_MAXIMUM,
2549 "application/x-3gp", "profile", G_TYPE_STRING, profile, NULL);
2558 /*** video/mj2 and image/jp2 ***/
2559 static GstStaticCaps mj2_caps = GST_STATIC_CAPS ("video/mj2");
2561 #define MJ2_CAPS gst_static_caps_get(&mj2_caps)
2563 static GstStaticCaps jp2_caps = GST_STATIC_CAPS ("image/jp2");
2565 #define JP2_CAPS gst_static_caps_get(&jp2_caps)
2568 jp2_type_find (GstTypeFind * tf, gpointer unused)
2572 data = gst_type_find_peek (tf, 0, 24);
2577 if (memcmp (data, "\000\000\000\014jP \015\012\207\012", 12) != 0)
2580 /* check ftyp box */
2582 if (memcmp (data + 4, "ftyp", 4) == 0) {
2583 if (memcmp (data + 8, "jp2 ", 4) == 0)
2584 gst_type_find_suggest (tf, GST_TYPE_FIND_MAXIMUM, JP2_CAPS);
2585 else if (memcmp (data + 8, "mjp2", 4) == 0)
2586 gst_type_find_suggest (tf, GST_TYPE_FIND_MAXIMUM, MJ2_CAPS);
2590 /*** video/quicktime ***/
2592 static GstStaticCaps qt_caps = GST_STATIC_CAPS ("video/quicktime");
2594 #define QT_CAPS gst_static_caps_get(&qt_caps)
2595 #define STRNCMP(x,y,z) (strncmp ((char*)(x), (char*)(y), z))
2597 /* FIXME 0.11: go through http://www.ftyps.com/ */
2599 qt_type_find (GstTypeFind * tf, gpointer unused)
2605 const gchar *variant = NULL;
2607 while ((data = gst_type_find_peek (tf, offset, 12)) != NULL) {
2610 if (STRNCMP (&data[4], "ftypqt ", 8) == 0) {
2611 tip = GST_TYPE_FIND_MAXIMUM;
2615 if (STRNCMP (&data[4], "ftypisom", 8) == 0 ||
2616 STRNCMP (&data[4], "ftypavc1", 8) == 0 ||
2617 STRNCMP (&data[4], "ftypmp42", 8) == 0) {
2618 tip = GST_TYPE_FIND_MAXIMUM;
2623 /* box/atom types that are in common with ISO base media file format */
2624 if (STRNCMP (&data[4], "moov", 4) == 0 ||
2625 STRNCMP (&data[4], "mdat", 4) == 0 ||
2626 STRNCMP (&data[4], "ftyp", 4) == 0 ||
2627 STRNCMP (&data[4], "free", 4) == 0 ||
2628 STRNCMP (&data[4], "uuid", 4) == 0 ||
2629 STRNCMP (&data[4], "skip", 4) == 0) {
2631 tip = GST_TYPE_FIND_LIKELY;
2633 tip = GST_TYPE_FIND_NEARLY_CERTAIN;
2636 /* other box/atom types, apparently quicktime specific */
2637 else if (STRNCMP (&data[4], "pnot", 4) == 0 ||
2638 STRNCMP (&data[4], "PICT", 4) == 0 ||
2639 STRNCMP (&data[4], "wide", 4) == 0 ||
2640 STRNCMP (&data[4], "prfl", 4) == 0) {
2641 tip = GST_TYPE_FIND_MAXIMUM;
2648 size = GST_READ_UINT32_BE (data);
2649 /* check compatible brands rather than ever expaning major brands above */
2650 if ((STRNCMP (&data[4], "ftyp", 4) == 0) && (size >= 16)) {
2651 new_offset = offset + 12;
2652 while (new_offset + 4 <= offset + size) {
2653 data = gst_type_find_peek (tf, new_offset, 4);
2656 if (STRNCMP (&data[4], "isom", 4) == 0 ||
2657 STRNCMP (&data[4], "avc1", 4) == 0 ||
2658 STRNCMP (&data[4], "mp41", 4) == 0 ||
2659 STRNCMP (&data[4], "mp42", 4) == 0) {
2660 tip = GST_TYPE_FIND_MAXIMUM;
2670 sizedata = gst_type_find_peek (tf, offset + 8, 8);
2671 if (sizedata == NULL)
2674 size = GST_READ_UINT64_BE (sizedata);
2679 new_offset = offset + size;
2680 if (new_offset <= offset)
2682 offset = new_offset;
2688 GstCaps *caps = gst_caps_copy (QT_CAPS);
2690 gst_caps_set_simple (caps, "variant", G_TYPE_STRING, variant, NULL);
2691 gst_type_find_suggest (tf, tip, caps);
2692 gst_caps_unref (caps);
2694 gst_type_find_suggest (tf, tip, QT_CAPS);
2700 /*** image/x-quicktime ***/
2702 static GstStaticCaps qtif_caps = GST_STATIC_CAPS ("image/x-quicktime");
2704 #define QTIF_CAPS gst_static_caps_get(&qtif_caps)
2706 /* how many atoms we check before we give up */
2707 #define QTIF_MAXROUNDS 25
2710 qtif_type_find (GstTypeFind * tf, gpointer unused)
2713 gboolean found_idsc = FALSE;
2714 gboolean found_idat = FALSE;
2718 while ((data = gst_type_find_peek (tf, offset, 8)) != NULL) {
2721 size = GST_READ_UINT32_BE (data);
2723 const guint8 *sizedata;
2725 sizedata = gst_type_find_peek (tf, offset + 8, 8);
2726 if (sizedata == NULL)
2729 size = GST_READ_UINT64_BE (sizedata);
2734 if (STRNCMP (data + 4, "idsc", 4) == 0)
2736 if (STRNCMP (data + 4, "idat", 4) == 0)
2739 if (found_idsc && found_idat) {
2740 gst_type_find_suggest (tf, GST_TYPE_FIND_MAXIMUM, QTIF_CAPS);
2745 if (++rounds > QTIF_MAXROUNDS)
2749 if (found_idsc || found_idat) {
2750 gst_type_find_suggest (tf, GST_TYPE_FIND_LIKELY, QTIF_CAPS);
2755 /*** audio/x-mod ***/
2757 static GstStaticCaps mod_caps = GST_STATIC_CAPS ("audio/x-mod");
2759 #define MOD_CAPS gst_static_caps_get(&mod_caps)
2760 /* FIXME: M15 CheckType to do */
2762 mod_type_find (GstTypeFind * tf, gpointer unused)
2767 if ((data = gst_type_find_peek (tf, 1080, 4)) != NULL) {
2768 /* Protracker and variants */
2769 if ((memcmp (data, "M.K.", 4) == 0) || (memcmp (data, "M!K!", 4) == 0) ||
2771 (memcmp (data, "FLT", 3) == 0 && isdigit (data[3])) ||
2772 (memcmp (data, "EXO", 3) == 0 && isdigit (data[3])) ||
2773 /* Oktalyzer (Amiga) */
2774 (memcmp (data, "OKTA", 4) == 0) ||
2775 /* Oktalyser (Atari) */
2776 (memcmp (data, "CD81", 4) == 0) ||
2778 (memcmp (data + 1, "CHN", 3) == 0 && isdigit (data[0])) ||
2779 /* Fasttracker or Taketracker */
2780 (memcmp (data + 2, "CH", 2) == 0 && isdigit (data[0])
2781 && isdigit (data[1])) || (memcmp (data + 2, "CN", 2) == 0
2782 && isdigit (data[0]) && isdigit (data[1]))) {
2783 gst_type_find_suggest (tf, GST_TYPE_FIND_MAXIMUM, MOD_CAPS);
2788 if ((data = gst_type_find_peek (tf, 0, 38)) != NULL) {
2789 if (memcmp (data, "Extended Module: ", 17) == 0 && data[37] == 0x1A) {
2790 gst_type_find_suggest (tf, GST_TYPE_FIND_MAXIMUM, MOD_CAPS);
2795 if (data || (data = gst_type_find_peek (tf, 0, 8)) != NULL) {
2796 if (memcmp (data, "OKTASONG", 8) == 0) {
2797 gst_type_find_suggest (tf, GST_TYPE_FIND_MAXIMUM, MOD_CAPS);
2801 if (data || (data = gst_type_find_peek (tf, 0, 4)) != NULL) {
2803 if ((memcmp (data, "if", 2) == 0) || (memcmp (data, "JN", 2) == 0)) {
2804 gst_type_find_suggest (tf, GST_TYPE_FIND_LIKELY, MOD_CAPS);
2808 if ((memcmp (data, "AMF", 3) == 0 && data[3] > 10 && data[3] < 14) ||
2810 (memcmp (data, "IMPM", 4) == 0) ||
2812 (memcmp (data, "MMD0", 4) == 0) || (memcmp (data, "MMD1", 4) == 0) ||
2814 (memcmp (data, "MTM", 3) == 0)) {
2815 gst_type_find_suggest (tf, GST_TYPE_FIND_MAXIMUM, MOD_CAPS);
2819 if (memcmp (data, "RIFF", 4) == 0) {
2820 guint8 *data2 = gst_type_find_peek (tf, 8, 4);
2823 if (memcmp (data2, "DSMF", 4) == 0) {
2824 gst_type_find_suggest (tf, GST_TYPE_FIND_MAXIMUM, MOD_CAPS);
2830 if (memcmp (data, "FAM\xFE", 4) == 0) {
2831 guint8 *data2 = gst_type_find_peek (tf, 44, 3);
2834 if (memcmp (data2, "compare", 3) == 0) {
2835 gst_type_find_suggest (tf, GST_TYPE_FIND_MAXIMUM, MOD_CAPS);
2839 gst_type_find_suggest (tf, GST_TYPE_FIND_LIKELY, MOD_CAPS);
2844 if (memcmp (data, "GDM\xFE", 4) == 0) {
2845 guint8 *data2 = gst_type_find_peek (tf, 71, 4);
2848 if (memcmp (data2, "GMFS", 4) == 0) {
2849 gst_type_find_suggest (tf, GST_TYPE_FIND_MAXIMUM, MOD_CAPS);
2853 gst_type_find_suggest (tf, GST_TYPE_FIND_LIKELY, MOD_CAPS);
2859 if ((data = gst_type_find_peek (tf, 60, 4)) != NULL) {
2860 if (memcmp (data, "IM10", 4) == 0) {
2861 gst_type_find_suggest (tf, GST_TYPE_FIND_MAXIMUM, MOD_CAPS);
2866 if ((data = gst_type_find_peek (tf, 44, 4)) != NULL) {
2867 if (memcmp (data, "SCRM", 4) == 0) {
2868 gst_type_find_suggest (tf, GST_TYPE_FIND_MAXIMUM, MOD_CAPS);
2873 if ((data = gst_type_find_peek (tf, 20, 8)) != NULL) {
2874 if (g_ascii_strncasecmp ((gchar *) data, "!Scream!", 8) == 0 ||
2875 g_ascii_strncasecmp ((gchar *) data, "BMOD2STM", 8) == 0) {
2876 guint8 *id, *stmtype;
2878 if ((id = gst_type_find_peek (tf, 28, 1)) == NULL)
2880 if ((stmtype = gst_type_find_peek (tf, 29, 1)) == NULL)
2882 if (*id == 0x1A && *stmtype == 2)
2883 gst_type_find_suggest (tf, GST_TYPE_FIND_MAXIMUM, MOD_CAPS);
2889 /*** application/x-shockwave-flash ***/
2891 static GstStaticCaps swf_caps =
2892 GST_STATIC_CAPS ("application/x-shockwave-flash");
2893 #define SWF_CAPS (gst_static_caps_get(&swf_caps))
2895 swf_type_find (GstTypeFind * tf, gpointer unused)
2897 guint8 *data = gst_type_find_peek (tf, 0, 4);
2899 if (data && (data[0] == 'F' || data[0] == 'C') &&
2900 data[1] == 'W' && data[2] == 'S') {
2901 gst_type_find_suggest (tf, GST_TYPE_FIND_MAXIMUM, SWF_CAPS);
2905 /*** image/jpeg ***/
2907 #define JPEG_MARKER_IS_START_OF_FRAME(x) \
2908 ((x)>=0xc0 && (x) <= 0xcf && (x)!=0xc4 && (x)!=0xc8 && (x)!=0xcc)
2910 static GstStaticCaps jpeg_caps = GST_STATIC_CAPS ("image/jpeg");
2912 #define JPEG_CAPS (gst_static_caps_get(&jpeg_caps))
2914 jpeg_type_find (GstTypeFind * tf, gpointer unused)
2916 GstTypeFindProbability prob = GST_TYPE_FIND_POSSIBLE;
2917 DataScanCtx c = { 0, NULL, 0 };
2921 if (G_UNLIKELY (!data_scan_ctx_ensure_data (tf, &c, 2)))
2924 if (c.data[0] != 0xff || c.data[1] != 0xd8)
2928 data_scan_ctx_advance (tf, &c, 2);
2930 caps = gst_caps_copy (JPEG_CAPS);
2932 while (data_scan_ctx_ensure_data (tf, &c, 4) && c.offset < (200 * 1024)) {
2936 if (c.data[0] != 0xff)
2940 if (G_UNLIKELY (marker == 0xff)) {
2941 data_scan_ctx_advance (tf, &c, 1);
2945 data_scan_ctx_advance (tf, &c, 2);
2947 /* we assume all markers we'll see before SOF have a payload length; if
2948 * that's not the case we'll just detect a false sync and bail out, but
2949 * still report POSSIBLE probability */
2950 len = GST_READ_UINT16_BE (c.data);
2952 GST_LOG ("possible JPEG marker 0x%02x (@0x%04x), segment length %u",
2953 marker, (guint) c.offset, len);
2955 if (!data_scan_ctx_ensure_data (tf, &c, len))
2958 if (marker == 0xc4 || /* DEFINE_HUFFMAN_TABLES */
2959 marker == 0xcc || /* DEFINE_ARITHMETIC_CONDITIONING */
2960 marker == 0xdb || /* DEFINE_QUANTIZATION_TABLES */
2961 marker == 0xdd || /* DEFINE_RESTART_INTERVAL */
2962 marker == 0xfe) { /* COMMENT */
2963 data_scan_ctx_advance (tf, &c, len);
2965 } else if (marker == 0xe0 && len >= (2 + 4) && /* APP0 */
2966 data_scan_ctx_memcmp (tf, &c, 2, "JFIF", 4)) {
2967 GST_LOG ("found JFIF tag");
2968 prob = GST_TYPE_FIND_MAXIMUM;
2969 data_scan_ctx_advance (tf, &c, len);
2971 /* we continue until we find a start of frame marker */
2972 } else if (marker == 0xe1 && len >= (2 + 4) && /* APP1 */
2973 data_scan_ctx_memcmp (tf, &c, 2, "Exif", 4)) {
2974 GST_LOG ("found Exif tag");
2975 prob = GST_TYPE_FIND_MAXIMUM;
2976 data_scan_ctx_advance (tf, &c, len);
2978 /* we continue until we find a start of frame marker */
2979 } else if (marker >= 0xe0 && marker <= 0xef) { /* APPn */
2980 data_scan_ctx_advance (tf, &c, len);
2982 } else if (JPEG_MARKER_IS_START_OF_FRAME (marker) && len >= (2 + 8)) {
2985 h = GST_READ_UINT16_BE (c.data + 2 + 1);
2986 w = GST_READ_UINT16_BE (c.data + 2 + 1 + 2);
2987 if (h == 0 || w == 0) {
2988 GST_WARNING ("bad width %u and/or height %u in SOF header", w, h);
2992 GST_LOG ("SOF at offset %" G_GUINT64_FORMAT ", num_markers=%d, "
2993 "WxH=%dx%d", c.offset - 2, num_markers, w, h);
2995 if (num_markers >= 5 || prob == GST_TYPE_FIND_MAXIMUM)
2996 prob = GST_TYPE_FIND_MAXIMUM;
2998 prob = GST_TYPE_FIND_LIKELY;
3000 gst_caps_set_simple (caps, "width", G_TYPE_INT, w,
3001 "height", G_TYPE_INT, h, NULL);
3004 GST_WARNING ("bad length or unexpected JPEG marker 0xff 0x%02x", marker);
3009 gst_type_find_suggest (tf, prob, caps);
3010 gst_caps_unref (caps);
3015 static GstStaticCaps bmp_caps = GST_STATIC_CAPS ("image/bmp");
3017 #define BMP_CAPS (gst_static_caps_get(&bmp_caps))
3019 bmp_type_find (GstTypeFind * tf, gpointer unused)
3021 DataScanCtx c = { 0, NULL, 0 };
3022 guint32 struct_size, w, h, planes, bpp;
3024 if (G_UNLIKELY (!data_scan_ctx_ensure_data (tf, &c, 54)))
3027 if (c.data[0] != 'B' || c.data[1] != 'M')
3030 /* skip marker + size */
3031 data_scan_ctx_advance (tf, &c, 2 + 4);
3033 /* reserved, must be 0 */
3034 if (c.data[0] != 0 || c.data[1] != 0 || c.data[2] != 0 || c.data[3] != 0)
3037 data_scan_ctx_advance (tf, &c, 2 + 2);
3039 /* offset to start of image data in bytes (check for sanity) */
3040 GST_LOG ("offset=%u", GST_READ_UINT32_LE (c.data));
3041 if (GST_READ_UINT32_LE (c.data) > (10 * 1024 * 1024))
3044 struct_size = GST_READ_UINT32_LE (c.data + 4);
3045 GST_LOG ("struct_size=%u", struct_size);
3047 data_scan_ctx_advance (tf, &c, 4 + 4);
3049 if (struct_size == 0x0C) {
3050 w = GST_READ_UINT16_LE (c.data);
3051 h = GST_READ_UINT16_LE (c.data + 2);
3052 planes = GST_READ_UINT16_LE (c.data + 2 + 2);
3053 bpp = GST_READ_UINT16_LE (c.data + 2 + 2 + 2);
3054 } else if (struct_size == 40 || struct_size == 64 || struct_size == 108
3055 || struct_size == 124 || struct_size == 0xF0) {
3056 w = GST_READ_UINT32_LE (c.data);
3057 h = GST_READ_UINT32_LE (c.data + 4);
3058 planes = GST_READ_UINT16_LE (c.data + 4 + 4);
3059 bpp = GST_READ_UINT16_LE (c.data + 4 + 4 + 2);
3064 /* image sizes sanity check */
3065 GST_LOG ("w=%u, h=%u, planes=%u, bpp=%u", w, h, planes, bpp);
3066 if (w == 0 || w > 0xfffff || h == 0 || h > 0xfffff || planes != 1 ||
3067 (bpp != 1 && bpp != 4 && bpp != 8 && bpp != 16 && bpp != 24 && bpp != 32))
3070 gst_type_find_suggest_simple (tf, GST_TYPE_FIND_MAXIMUM, "image/bmp",
3071 "width", G_TYPE_INT, w, "height", G_TYPE_INT, h, "bpp", G_TYPE_INT, bpp,
3075 /*** image/tiff ***/
3076 static GstStaticCaps tiff_caps = GST_STATIC_CAPS ("image/tiff, "
3077 "endianness = (int) { BIG_ENDIAN, LITTLE_ENDIAN }");
3078 #define TIFF_CAPS (gst_static_caps_get(&tiff_caps))
3079 static GstStaticCaps tiff_be_caps = GST_STATIC_CAPS ("image/tiff, "
3080 "endianness = (int) BIG_ENDIAN");
3081 #define TIFF_BE_CAPS (gst_static_caps_get(&tiff_be_caps))
3082 static GstStaticCaps tiff_le_caps = GST_STATIC_CAPS ("image/tiff, "
3083 "endianness = (int) LITTLE_ENDIAN");
3084 #define TIFF_LE_CAPS (gst_static_caps_get(&tiff_le_caps))
3086 tiff_type_find (GstTypeFind * tf, gpointer ununsed)
3088 guint8 *data = gst_type_find_peek (tf, 0, 8);
3089 guint8 le_header[4] = { 0x49, 0x49, 0x2A, 0x00 };
3090 guint8 be_header[4] = { 0x4D, 0x4D, 0x00, 0x2A };
3093 if (memcmp (data, le_header, 4) == 0) {
3094 gst_type_find_suggest (tf, GST_TYPE_FIND_MAXIMUM, TIFF_LE_CAPS);
3095 } else if (memcmp (data, be_header, 4) == 0) {
3096 gst_type_find_suggest (tf, GST_TYPE_FIND_MAXIMUM, TIFF_BE_CAPS);
3103 static GstStaticCaps pnm_caps = GST_STATIC_CAPS ("image/x-portable-bitmap; "
3104 "image/x-portable-graymap; image/x-portable-pixmap; "
3105 "image/x-portable-anymap");
3107 #define PNM_CAPS (gst_static_caps_get(&pnm_caps))
3109 #define IS_PNM_WHITESPACE(c) \
3110 ((c) == ' ' || (c) == '\r' || (c) == '\n' || (c) == 't')
3113 pnm_type_find (GstTypeFind * tf, gpointer ununsed)
3115 const gchar *media_type = NULL;
3116 DataScanCtx c = { 0, NULL, 0 };
3119 if (G_UNLIKELY (!data_scan_ctx_ensure_data (tf, &c, 16)))
3122 /* see http://en.wikipedia.org/wiki/Netpbm_format */
3123 if (c.data[0] != 'P' || c.data[1] < '1' || c.data[1] > '7' ||
3124 !IS_PNM_WHITESPACE (c.data[2]) ||
3125 (c.data[3] != '#' && c.data[3] < '0' && c.data[3] > '9'))
3128 switch (c.data[1]) {
3130 media_type = "image/x-portable-bitmap"; /* ASCII */
3133 media_type = "image/x-portable-graymap"; /* ASCII */
3136 media_type = "image/x-portable-pixmap"; /* ASCII */
3139 media_type = "image/x-portable-bitmap"; /* Raw */
3142 media_type = "image/x-portable-graymap"; /* Raw */
3145 media_type = "image/x-portable-pixmap"; /* Raw */
3148 media_type = "image/x-portable-anymap";
3151 g_return_if_reached ();
3154 /* try to extract width and height as well */
3155 if (c.data[1] != '7') {
3156 gchar s[64] = { 0, }
3159 /* need to skip any comment lines first */
3160 data_scan_ctx_advance (tf, &c, 3);
3161 while (c.data[0] == '#') { /* we know there's still data left */
3162 data_scan_ctx_advance (tf, &c, 1);
3163 while (c.data[0] != '\n' && c.data[0] != '\r') {
3164 if (!data_scan_ctx_ensure_data (tf, &c, 4))
3166 data_scan_ctx_advance (tf, &c, 1);
3168 data_scan_ctx_advance (tf, &c, 1);
3169 GST_LOG ("skipped comment line in PNM header");
3172 if (!data_scan_ctx_ensure_data (tf, &c, 32) &&
3173 !data_scan_ctx_ensure_data (tf, &c, 4)) {
3177 /* need to NUL-terminate data for sscanf */
3178 memcpy (s, c.data, MIN (sizeof (s) - 1, c.size));
3179 if (sscanf (s, "%u%c%u%c", &w, &sep1, &h, &sep2) == 4 &&
3180 IS_PNM_WHITESPACE (sep1) && IS_PNM_WHITESPACE (sep2) &&
3181 w > 0 && w < G_MAXINT && h > 0 && h < G_MAXINT) {
3182 GST_LOG ("extracted PNM width and height: %dx%d", w, h);
3188 /* FIXME: extract width + height for anymaps too */
3191 if (w > 0 && h > 0) {
3192 gst_type_find_suggest_simple (tf, GST_TYPE_FIND_MAXIMUM, media_type,
3193 "width", G_TYPE_INT, w, "height", G_TYPE_INT, h, NULL);
3195 gst_type_find_suggest_simple (tf, GST_TYPE_FIND_LIKELY, media_type, NULL);
3199 static GstStaticCaps sds_caps = GST_STATIC_CAPS ("audio/x-sds");
3201 #define SDS_CAPS (gst_static_caps_get(&sds_caps))
3203 sds_type_find (GstTypeFind * tf, gpointer ununsed)
3205 guint8 *data = gst_type_find_peek (tf, 0, 4);
3206 guint8 mask[4] = { 0xFF, 0xFF, 0x80, 0xFF };
3207 guint8 match[4] = { 0xF0, 0x7E, 0, 0x01 };
3211 for (x = 0; x < 4; x++) {
3212 if ((data[x] & mask[x]) != match[x]) {
3216 gst_type_find_suggest (tf, GST_TYPE_FIND_MAXIMUM, SDS_CAPS);
3220 static GstStaticCaps ircam_caps = GST_STATIC_CAPS ("audio/x-ircam");
3222 #define IRCAM_CAPS (gst_static_caps_get(&ircam_caps))
3224 ircam_type_find (GstTypeFind * tf, gpointer ununsed)
3226 guint8 *data = gst_type_find_peek (tf, 0, 4);
3227 guint8 mask[4] = { 0xFF, 0xFF, 0xF8, 0xFF };
3228 guint8 match[4] = { 0x64, 0xA3, 0x00, 0x00 };
3230 gboolean matched = TRUE;
3235 for (x = 0; x < 4; x++) {
3236 if ((data[x] & mask[x]) != match[x]) {
3241 gst_type_find_suggest (tf, GST_TYPE_FIND_MAXIMUM, IRCAM_CAPS);
3244 /* now try the reverse version */
3246 for (x = 0; x < 4; x++) {
3247 if ((data[x] & mask[3 - x]) != match[3 - x]) {
3253 /* EBML typefind helper */
3255 ebml_check_header (GstTypeFind * tf, const gchar * doctype, int doctype_len)
3257 /* 4 bytes for EBML ID, 1 byte for header length identifier */
3258 guint8 *data = gst_type_find_peek (tf, 0, 4 + 1);
3259 gint len_mask = 0x80, size = 1, n = 1, total;
3265 if (data[0] != 0x1A || data[1] != 0x45 || data[2] != 0xDF || data[3] != 0xA3)
3268 /* length of header */
3270 while (size <= 8 && !(total & len_mask)) {
3276 total &= (len_mask - 1);
3278 total = (total << 8) | data[4 + n++];
3280 /* get new data for full header, 4 bytes for EBML ID,
3281 * EBML length tag and the actual header */
3282 data = gst_type_find_peek (tf, 0, 4 + size + total);
3286 /* only check doctype if asked to do so */
3287 if (doctype == NULL || doctype_len == 0)
3290 /* the header must contain the doctype. For now, we don't parse the
3291 * whole header but simply check for the availability of that array
3292 * of characters inside the header. Not fully fool-proof, but good
3294 for (n = 4 + size; n <= 4 + size + total - doctype_len; n++)
3295 if (!memcmp (&data[n], doctype, doctype_len))
3301 /*** video/x-matroska ***/
3302 static GstStaticCaps matroska_caps = GST_STATIC_CAPS ("video/x-matroska");
3304 #define MATROSKA_CAPS (gst_static_caps_get(&matroska_caps))
3306 matroska_type_find (GstTypeFind * tf, gpointer ununsed)
3308 if (ebml_check_header (tf, "matroska", 8))
3309 gst_type_find_suggest (tf, GST_TYPE_FIND_MAXIMUM, MATROSKA_CAPS);
3310 else if (ebml_check_header (tf, NULL, 0))
3311 gst_type_find_suggest (tf, GST_TYPE_FIND_LIKELY, MATROSKA_CAPS);
3314 /*** video/webm ***/
3315 static GstStaticCaps webm_caps = GST_STATIC_CAPS ("video/webm");
3317 #define WEBM_CAPS (gst_static_caps_get(&webm_caps))
3319 webm_type_find (GstTypeFind * tf, gpointer ununsed)
3321 if (ebml_check_header (tf, "webm", 4))
3322 gst_type_find_suggest (tf, GST_TYPE_FIND_MAXIMUM, WEBM_CAPS);
3325 /*** application/mxf ***/
3326 static GstStaticCaps mxf_caps = GST_STATIC_CAPS ("application/mxf");
3328 #define MXF_MAX_PROBE_LENGTH (1024 * 64)
3329 #define MXF_CAPS (gst_static_caps_get(&mxf_caps))
3332 * MXF files start with a header partition pack key of 16 bytes which is defined
3333 * at SMPTE-377M 6.1. Before this there can be up to 64K of run-in which _must_
3334 * not contain the partition pack key.
3337 mxf_type_find (GstTypeFind * tf, gpointer ununsed)
3339 static const guint8 partition_pack_key[] =
3340 { 0x06, 0x0e, 0x2b, 0x34, 0x02, 0x05, 0x01, 0x01, 0x0d, 0x01, 0x02, 0x01,
3343 DataScanCtx c = { 0, NULL, 0 };
3345 while (c.offset <= MXF_MAX_PROBE_LENGTH) {
3347 if (G_UNLIKELY (!data_scan_ctx_ensure_data (tf, &c, 1024)))
3350 /* look over in chunks of 1kbytes to avoid too much overhead */
3352 for (i = 0; i < 1024 - 16; i++) {
3353 /* Check first byte before calling more expensive memcmp function */
3354 if (G_UNLIKELY (c.data[i] == 0x06
3355 && memcmp (c.data + i, partition_pack_key, 13) == 0)) {
3356 /* Header partition pack? */
3357 if (c.data[i + 13] != 0x02)
3360 /* Partition status */
3361 if (c.data[i + 14] >= 0x05)
3364 /* Reserved, must be 0x00 */
3365 if (c.data[i + 15] != 0x00)
3368 gst_type_find_suggest (tf, GST_TYPE_FIND_MAXIMUM, MXF_CAPS);
3374 data_scan_ctx_advance (tf, &c, 1024 - 16);
3378 /*** video/x-dv ***/
3380 static GstStaticCaps dv_caps = GST_STATIC_CAPS ("video/x-dv, "
3381 "systemstream = (boolean) true");
3382 #define DV_CAPS (gst_static_caps_get(&dv_caps))
3384 dv_type_find (GstTypeFind * tf, gpointer private)
3388 data = gst_type_find_peek (tf, 0, 5);
3390 /* check for DIF and DV flag */
3391 if (data && (data[0] == 0x1f) && (data[1] == 0x07) && (data[2] == 0x00)) {
3392 const gchar *format;
3394 if (data[3] & 0x80) {
3400 gst_type_find_suggest_simple (tf, GST_TYPE_FIND_MAXIMUM, "video/x-dv",
3401 "systemstream", G_TYPE_BOOLEAN, TRUE,
3402 "format", G_TYPE_STRING, format, NULL);
3407 /*** application/ogg and application/x-annodex ***/
3408 static GstStaticCaps ogg_caps = GST_STATIC_CAPS ("application/ogg");
3409 static GstStaticCaps annodex_caps = GST_STATIC_CAPS ("application/x-annodex");
3410 static GstStaticCaps ogg_annodex_caps =
3411 GST_STATIC_CAPS ("application/ogg;application/x-annodex");
3413 #define OGGANX_CAPS (gst_static_caps_get(&ogg_annodex_caps))
3416 ogganx_type_find (GstTypeFind * tf, gpointer private)
3418 guint8 *data = gst_type_find_peek (tf, 0, 4);
3420 if ((data != NULL) && (memcmp (data, "OggS", 4) == 0)) {
3422 /* Check for an annodex fishbone header */
3423 data = gst_type_find_peek (tf, 28, 8);
3424 if (data && memcmp (data, "fishead\0", 8) == 0)
3425 gst_type_find_suggest (tf, GST_TYPE_FIND_MAXIMUM,
3426 gst_static_caps_get (&annodex_caps));
3428 gst_type_find_suggest (tf, GST_TYPE_FIND_MAXIMUM,
3429 gst_static_caps_get (&ogg_caps));
3433 /*** audio/x-vorbis ***/
3434 static GstStaticCaps vorbis_caps = GST_STATIC_CAPS ("audio/x-vorbis");
3436 #define VORBIS_CAPS (gst_static_caps_get(&vorbis_caps))
3438 vorbis_type_find (GstTypeFind * tf, gpointer private)
3440 guint8 *data = gst_type_find_peek (tf, 0, 30);
3446 /* 1 byte packet type (identification=0x01)
3447 6 byte string "vorbis"
3448 4 byte vorbis version */
3449 if (memcmp (data, "\001vorbis\000\000\000\000", 11) != 0)
3452 /* 1 byte channels must be != 0 */
3456 /* 4 byte samplerate must be != 0 */
3457 if (GST_READ_UINT32_LE (data) == 0)
3460 /* blocksize checks */
3461 blocksize_0 = data[0] & 0x0F;
3462 blocksize_1 = (data[0] & 0xF0) >> 4;
3463 if (blocksize_0 > blocksize_1)
3465 if (blocksize_0 < 6 || blocksize_0 > 13)
3467 if (blocksize_1 < 6 || blocksize_1 > 13)
3471 if ((data[0] & 0x01) != 1)
3473 gst_type_find_suggest (tf, GST_TYPE_FIND_MAXIMUM, VORBIS_CAPS);
3477 /*** video/x-theora ***/
3479 static GstStaticCaps theora_caps = GST_STATIC_CAPS ("video/x-theora");
3481 #define THEORA_CAPS (gst_static_caps_get(&theora_caps))
3483 theora_type_find (GstTypeFind * tf, gpointer private)
3485 guint8 *data = gst_type_find_peek (tf, 0, 7); //42);
3488 if (data[0] != 0x80)
3490 if (memcmp (&data[1], "theora", 6) != 0)
3492 /* FIXME: make this more reliable when specs are out */
3494 gst_type_find_suggest (tf, GST_TYPE_FIND_MAXIMUM, THEORA_CAPS);
3500 kate_type_find (GstTypeFind * tf, gpointer private)
3502 guint8 *data = gst_type_find_peek (tf, 0, 64);
3503 gchar category[16] = { 0, };
3505 if (G_UNLIKELY (data == NULL))
3508 /* see: http://wiki.xiph.org/index.php/OggKate#Format_specification */
3509 if (G_LIKELY (memcmp (data, "\200kate\0\0\0", 8) != 0))
3512 /* make sure we always have a NUL-terminated string */
3513 memcpy (category, data + 48, 15);
3514 GST_LOG ("kate category: %s", category);
3515 /* canonical categories for subtitles: subtitles, spu-subtitles, SUB, K-SPU */
3516 if (strcmp (category, "subtitles") == 0 || strcmp (category, "SUB") == 0 ||
3517 strcmp (category, "spu-subtitles") == 0 ||
3518 strcmp (category, "K-SPU") == 0) {
3519 gst_type_find_suggest_simple (tf, GST_TYPE_FIND_MAXIMUM,
3520 "subtitle/x-kate", NULL);
3522 gst_type_find_suggest_simple (tf, GST_TYPE_FIND_MAXIMUM,
3523 "application/x-kate", NULL);
3527 /*** application/x-ogm-video or audio***/
3529 static GstStaticCaps ogmvideo_caps =
3530 GST_STATIC_CAPS ("application/x-ogm-video");
3531 #define OGMVIDEO_CAPS (gst_static_caps_get(&ogmvideo_caps))
3533 ogmvideo_type_find (GstTypeFind * tf, gpointer private)
3535 guint8 *data = gst_type_find_peek (tf, 0, 9);
3538 if (memcmp (data, "\001video\000\000\000", 9) != 0)
3540 gst_type_find_suggest (tf, GST_TYPE_FIND_MAXIMUM, OGMVIDEO_CAPS);
3544 static GstStaticCaps ogmaudio_caps =
3545 GST_STATIC_CAPS ("application/x-ogm-audio");
3546 #define OGMAUDIO_CAPS (gst_static_caps_get(&ogmaudio_caps))
3548 ogmaudio_type_find (GstTypeFind * tf, gpointer private)
3550 guint8 *data = gst_type_find_peek (tf, 0, 9);
3553 if (memcmp (data, "\001audio\000\000\000", 9) != 0)
3555 gst_type_find_suggest (tf, GST_TYPE_FIND_MAXIMUM, OGMAUDIO_CAPS);
3559 static GstStaticCaps ogmtext_caps = GST_STATIC_CAPS ("application/x-ogm-text");
3561 #define OGMTEXT_CAPS (gst_static_caps_get(&ogmtext_caps))
3563 ogmtext_type_find (GstTypeFind * tf, gpointer private)
3565 guint8 *data = gst_type_find_peek (tf, 0, 9);
3568 if (memcmp (data, "\001text\000\000\000\000", 9) != 0)
3570 gst_type_find_suggest (tf, GST_TYPE_FIND_MAXIMUM, OGMTEXT_CAPS);
3574 /*** audio/x-speex ***/
3576 static GstStaticCaps speex_caps = GST_STATIC_CAPS ("audio/x-speex");
3578 #define SPEEX_CAPS (gst_static_caps_get(&speex_caps))
3580 speex_type_find (GstTypeFind * tf, gpointer private)
3582 guint8 *data = gst_type_find_peek (tf, 0, 80);
3585 /* 8 byte string "Speex "
3586 24 byte speex version string + int */
3587 if (memcmp (data, "Speex ", 8) != 0)
3591 /* 4 byte header size >= 80 */
3592 if (GST_READ_UINT32_LE (data) < 80)
3596 /* 4 byte sample rate <= 48000 */
3597 if (GST_READ_UINT32_LE (data) > 48000)
3601 /* currently there are only 3 speex modes. */
3602 if (GST_READ_UINT32_LE (data) > 3)
3606 gst_type_find_suggest (tf, GST_TYPE_FIND_MAXIMUM, SPEEX_CAPS);
3610 /*** audio/x-celt ***/
3612 static GstStaticCaps celt_caps = GST_STATIC_CAPS ("audio/x-celt");
3614 #define CELT_CAPS (gst_static_caps_get(&celt_caps))
3616 celt_type_find (GstTypeFind * tf, gpointer private)
3618 guint8 *data = gst_type_find_peek (tf, 0, 8);
3621 /* 8 byte string "CELT " */
3622 if (memcmp (data, "CELT ", 8) != 0)
3625 /* TODO: Check other values of the CELT header */
3626 gst_type_find_suggest (tf, GST_TYPE_FIND_MAXIMUM, CELT_CAPS);
3630 /*** application/x-ogg-skeleton ***/
3631 static GstStaticCaps ogg_skeleton_caps =
3632 GST_STATIC_CAPS ("application/x-ogg-skeleton, parsed=(boolean)FALSE");
3633 #define OGG_SKELETON_CAPS (gst_static_caps_get(&ogg_skeleton_caps))
3635 oggskel_type_find (GstTypeFind * tf, gpointer private)
3637 guint8 *data = gst_type_find_peek (tf, 0, 12);
3640 /* 8 byte string "fishead\0" for the ogg skeleton stream */
3641 if (memcmp (data, "fishead\0", 8) != 0)
3645 /* Require that the header contains version 3.0 */
3646 if (GST_READ_UINT16_LE (data) != 3)
3649 if (GST_READ_UINT16_LE (data) != 0)
3652 gst_type_find_suggest (tf, GST_TYPE_FIND_MAXIMUM, OGG_SKELETON_CAPS);
3656 static GstStaticCaps cmml_caps = GST_STATIC_CAPS ("text/x-cmml");
3658 #define CMML_CAPS (gst_static_caps_get(&cmml_caps))
3660 cmml_type_find (GstTypeFind * tf, gpointer private)
3662 /* Header is 12 bytes minimum (though we don't check the minor version */
3663 guint8 *data = gst_type_find_peek (tf, 0, 12);
3667 /* 8 byte string "CMML\0\0\0\0" for the magic number */
3668 if (memcmp (data, "CMML\0\0\0\0", 8) != 0)
3672 /* Require that the header contains at least version 2.0 */
3673 if (GST_READ_UINT16_LE (data) < 2)
3676 gst_type_find_suggest (tf, GST_TYPE_FIND_MAXIMUM, CMML_CAPS);
3680 /*** application/x-tar ***/
3682 static GstStaticCaps tar_caps = GST_STATIC_CAPS ("application/x-tar");
3684 #define TAR_CAPS (gst_static_caps_get(&tar_caps))
3685 #define OLDGNU_MAGIC "ustar " /* 7 chars and a NUL */
3686 #define NEWGNU_MAGIC "ustar" /* 5 chars and a NUL */
3688 tar_type_find (GstTypeFind * tf, gpointer unused)
3690 guint8 *data = gst_type_find_peek (tf, 257, 8);
3692 /* of course we are not certain, but we don't want other typefind funcs
3693 * to detect formats of files within the tar archive, e.g. mp3s */
3695 if (memcmp (data, OLDGNU_MAGIC, 8) == 0) { /* sic */
3696 gst_type_find_suggest (tf, GST_TYPE_FIND_NEARLY_CERTAIN, TAR_CAPS);
3697 } else if (memcmp (data, NEWGNU_MAGIC, 6) == 0 && /* sic */
3698 g_ascii_isdigit (data[6]) && g_ascii_isdigit (data[7])) {
3699 gst_type_find_suggest (tf, GST_TYPE_FIND_NEARLY_CERTAIN, TAR_CAPS);
3704 /*** application/x-ar ***/
3706 static GstStaticCaps ar_caps = GST_STATIC_CAPS ("application/x-ar");
3708 #define AR_CAPS (gst_static_caps_get(&ar_caps))
3710 ar_type_find (GstTypeFind * tf, gpointer unused)
3712 guint8 *data = gst_type_find_peek (tf, 0, 24);
3714 if (data && memcmp (data, "!<arch>", 7) == 0) {
3717 for (i = 7; i < 24; ++i) {
3718 if (!g_ascii_isprint (data[i]) && data[i] != '\n') {
3719 gst_type_find_suggest (tf, GST_TYPE_FIND_POSSIBLE, AR_CAPS);
3723 gst_type_find_suggest (tf, GST_TYPE_FIND_NEARLY_CERTAIN, AR_CAPS);
3727 /*** audio/x-au ***/
3729 /* NOTE: we cannot replace this function with TYPE_FIND_REGISTER_START_WITH,
3730 * as it is only possible to register one typefind factory per 'name'
3731 * (which is in this case the caps), and the first one would be replaced by
3732 * the second one. */
3733 static GstStaticCaps au_caps = GST_STATIC_CAPS ("audio/x-au");
3735 #define AU_CAPS (gst_static_caps_get(&au_caps))
3737 au_type_find (GstTypeFind * tf, gpointer unused)
3739 guint8 *data = gst_type_find_peek (tf, 0, 4);
3742 if (memcmp (data, ".snd", 4) == 0 || memcmp (data, "dns.", 4) == 0) {
3743 gst_type_find_suggest (tf, GST_TYPE_FIND_MAXIMUM, AU_CAPS);
3749 /*** video/x-nuv ***/
3751 /* NOTE: we cannot replace this function with TYPE_FIND_REGISTER_START_WITH,
3752 * as it is only possible to register one typefind factory per 'name'
3753 * (which is in this case the caps), and the first one would be replaced by
3754 * the second one. */
3755 static GstStaticCaps nuv_caps = GST_STATIC_CAPS ("video/x-nuv");
3757 #define NUV_CAPS (gst_static_caps_get(&nuv_caps))
3759 nuv_type_find (GstTypeFind * tf, gpointer unused)
3761 guint8 *data = gst_type_find_peek (tf, 0, 11);
3764 if (memcmp (data, "MythTVVideo", 11) == 0
3765 || memcmp (data, "NuppelVideo", 11) == 0) {
3766 gst_type_find_suggest (tf, GST_TYPE_FIND_MAXIMUM, NUV_CAPS);
3771 /*** audio/x-paris ***/
3772 /* NOTE: do not replace this function with two TYPE_FIND_REGISTER_START_WITH */
3773 static GstStaticCaps paris_caps = GST_STATIC_CAPS ("audio/x-paris");
3775 #define PARIS_CAPS (gst_static_caps_get(&paris_caps))
3777 paris_type_find (GstTypeFind * tf, gpointer unused)
3779 guint8 *data = gst_type_find_peek (tf, 0, 4);
3782 if (memcmp (data, " paf", 4) == 0 || memcmp (data, "fap ", 4) == 0) {
3783 gst_type_find_suggest (tf, GST_TYPE_FIND_MAXIMUM, PARIS_CAPS);
3788 /*** audio/iLBC-sh ***/
3789 /* NOTE: do not replace this function with two TYPE_FIND_REGISTER_START_WITH */
3790 static GstStaticCaps ilbc_caps = GST_STATIC_CAPS ("audio/iLBC-sh");
3792 #define ILBC_CAPS (gst_static_caps_get(&ilbc_caps))
3794 ilbc_type_find (GstTypeFind * tf, gpointer unused)
3796 guint8 *data = gst_type_find_peek (tf, 0, 8);
3799 if (memcmp (data, "#!iLBC30", 8) == 0 || memcmp (data, "#!iLBC20", 8) == 0) {
3800 gst_type_find_suggest (tf, GST_TYPE_FIND_LIKELY, ILBC_CAPS);
3805 /*** application/x-ms-dos-executable ***/
3807 static GstStaticCaps msdos_caps =
3808 GST_STATIC_CAPS ("application/x-ms-dos-executable");
3809 #define MSDOS_CAPS (gst_static_caps_get(&msdos_caps))
3810 /* see http://www.madchat.org/vxdevl/papers/winsys/pefile/pefile.htm */
3812 msdos_type_find (GstTypeFind * tf, gpointer unused)
3814 guint8 *data = gst_type_find_peek (tf, 0, 64);
3816 if (data && data[0] == 'M' && data[1] == 'Z' &&
3817 GST_READ_UINT16_LE (data + 8) == 4) {
3818 guint32 pe_offset = GST_READ_UINT32_LE (data + 60);
3820 data = gst_type_find_peek (tf, pe_offset, 2);
3821 if (data && data[0] == 'P' && data[1] == 'E') {
3822 gst_type_find_suggest (tf, GST_TYPE_FIND_NEARLY_CERTAIN, MSDOS_CAPS);
3827 /*** application/x-mmsh ***/
3829 static GstStaticCaps mmsh_caps = GST_STATIC_CAPS ("application/x-mmsh");
3831 #define MMSH_CAPS gst_static_caps_get(&mmsh_caps)
3833 /* This is to recognise mssh-over-http */
3835 mmsh_type_find (GstTypeFind * tf, gpointer unused)
3837 static const guint8 asf_marker[16] = { 0x30, 0x26, 0xb2, 0x75, 0x8e, 0x66,
3838 0xcf, 0x11, 0xa6, 0xd9, 0x00, 0xaa, 0x00, 0x62, 0xce, 0x6c
3843 data = gst_type_find_peek (tf, 0, 2 + 2 + 4 + 2 + 2 + 16);
3844 if (data && data[0] == 0x24 && data[1] == 0x48 &&
3845 GST_READ_UINT16_LE (data + 2) > 2 + 2 + 4 + 2 + 2 + 16 &&
3846 memcmp (data + 2 + 2 + 4 + 2 + 2, asf_marker, 16) == 0) {
3847 gst_type_find_suggest (tf, GST_TYPE_FIND_LIKELY, MMSH_CAPS);
3851 /*** video/x-dirac ***/
3853 /* NOTE: we cannot replace this function with TYPE_FIND_REGISTER_START_WITH,
3854 * as it is only possible to register one typefind factory per 'name'
3855 * (which is in this case the caps), and the first one would be replaced by
3856 * the second one. */
3857 static GstStaticCaps dirac_caps = GST_STATIC_CAPS ("video/x-dirac");
3859 #define DIRAC_CAPS (gst_static_caps_get(&dirac_caps))
3861 dirac_type_find (GstTypeFind * tf, gpointer unused)
3863 guint8 *data = gst_type_find_peek (tf, 0, 8);
3866 if (memcmp (data, "BBCD", 4) == 0 || memcmp (data, "KW-DIRAC", 8) == 0) {
3867 gst_type_find_suggest (tf, GST_TYPE_FIND_MAXIMUM, DIRAC_CAPS);
3872 /*** video/vivo ***/
3874 static GstStaticCaps vivo_caps = GST_STATIC_CAPS ("video/vivo");
3876 #define VIVO_CAPS gst_static_caps_get(&vivo_caps)
3879 vivo_type_find (GstTypeFind * tf, gpointer unused)
3881 static const guint8 vivo_marker[] = { 'V', 'e', 'r', 's', 'i', 'o', 'n',
3882 ':', 'V', 'i', 'v', 'o', '/'
3887 data = gst_type_find_peek (tf, 0, 1024);
3888 if (data == NULL || data[0] != 0x00)
3891 if ((data[1] & 0x80)) {
3892 if ((data[2] & 0x80))
3894 hdr_len = ((guint) (data[1] & 0x7f)) << 7;
3904 /* 1008 = 1022 - strlen ("Version:Vivo/") - 1 */
3905 while (pos < 1008 && data[pos] == '\r' && data[pos + 1] == '\n')
3908 if (memcmp (data + pos, vivo_marker, sizeof (vivo_marker)) == 0) {
3909 gst_type_find_suggest (tf, GST_TYPE_FIND_MAXIMUM, VIVO_CAPS);
3913 /*** XDG MIME typefinder (to avoid false positives mostly) ***/
3917 xdgmime_typefind (GstTypeFind * find, gpointer user_data)
3920 gsize length = 16384;
3925 if ((tf_length = gst_type_find_get_length (find)) > 0)
3926 length = MIN (length, tf_length);
3928 if ((data = gst_type_find_peek (find, 0, length)) == NULL)
3931 tmp = g_content_type_guess (NULL, data, length, NULL);
3932 if (tmp == NULL || g_content_type_is_unknown (tmp)) {
3937 mimetype = g_content_type_get_mime_type (tmp);
3940 if (mimetype == NULL)
3943 GST_DEBUG ("Got mimetype '%s'", mimetype);
3945 /* Ignore audio/video types:
3946 * - our own typefinders in -base are likely to be better at this
3947 * (and if they're not, we really want to fix them, that's why we don't
3948 * report xdg-detected audio/video types at all, not even with a low
3950 * - we want to detect GStreamer media types and not MIME types
3951 * - the purpose of this xdg mime finder is mainly to prevent false
3952 * positives of non-media formats, not to typefind audio/video formats */
3953 if (g_str_has_prefix (mimetype, "audio/") ||
3954 g_str_has_prefix (mimetype, "video/")) {
3955 GST_LOG ("Ignoring audio/video mime type");
3960 /* Again, we mainly want the xdg typefinding to prevent false-positives on
3961 * non-media formats, so suggest the type with a probability that trumps
3962 * uncertain results of our typefinders, but not more than that. */
3963 GST_LOG ("Suggesting '%s' with probability POSSIBLE", mimetype);
3964 gst_type_find_suggest_simple (find, GST_TYPE_FIND_POSSIBLE, mimetype, NULL);
3967 #endif /* USE_GIO */
3969 /*** Windows icon typefinder (to avoid false positives mostly) ***/
3972 windows_icon_typefind (GstTypeFind * find, gpointer user_data)
3976 guint16 type, nimages;
3977 gint32 size, offset;
3979 datalen = gst_type_find_get_length (find);
3980 if ((data = gst_type_find_peek (find, 0, 6)) == NULL)
3983 /* header - simple and not enough to rely on it alone */
3984 if (GST_READ_UINT16_LE (data) != 0)
3986 type = GST_READ_UINT16_LE (data + 2);
3987 if (type != 1 && type != 2)
3989 nimages = GST_READ_UINT16_LE (data + 4);
3990 if (nimages == 0) /* we can assume we can't have an empty image file ? */
3994 if (data[6 + 3] != 0)
3997 guint16 planes = GST_READ_UINT16_LE (data + 6 + 4);
4001 size = GST_READ_UINT32_LE (data + 6 + 8);
4002 offset = GST_READ_UINT32_LE (data + 6 + 12);
4003 if (offset < 0 || size <= 0 || size >= datalen || offset >= datalen
4004 || size + offset > datalen)
4007 gst_type_find_suggest_simple (find, GST_TYPE_FIND_NEARLY_CERTAIN,
4008 "image/x-icon", NULL);
4012 /*** DEGAS Atari images (also to avoid false positives, see #625129) ***/
4014 degas_type_find (GstTypeFind * tf, gpointer private)
4016 /* No magic, but it should have a fixed size and a few invalid values */
4017 /* http://www.fileformat.info/format/atari/spec/6ecf9f6eb5be494284a47feb8a214687/view.htm */
4023 len = gst_type_find_get_length (tf);
4024 if (len < 34) /* smallest header of the lot */
4026 data = gst_type_find_peek (tf, 0, 4);
4027 resolution = GST_READ_UINT16_BE (data);
4029 /* could be DEGAS */
4030 if (resolution <= 2)
4031 gst_type_find_suggest_simple (tf, GST_TYPE_FIND_POSSIBLE + 5,
4032 "image/x-degas", NULL);
4033 } else if (len == 32066) {
4034 /* could be DEGAS Elite */
4035 if (resolution <= 2) {
4036 data = gst_type_find_peek (tf, len - 16, 8);
4037 for (n = 0; n < 4; n++) {
4038 if (GST_READ_UINT16_BE (data + n * 2) > 2)
4041 gst_type_find_suggest_simple (tf, GST_TYPE_FIND_POSSIBLE + 5,
4042 "image/x-degas", NULL);
4044 } else if (len >= 66 && len < 32066) {
4045 /* could be compressed DEGAS Elite, but it's compressed and so we can't rely on size,
4046 it does have 4 16 bytes values near the end that are 0-2 though. */
4047 if ((resolution & 0x8000) && (resolution & 0x7fff) <= 2) {
4048 data = gst_type_find_peek (tf, len - 16, 8);
4049 for (n = 0; n < 4; n++) {
4050 if (GST_READ_UINT16_BE (data + n * 2) > 2)
4053 gst_type_find_suggest_simple (tf, GST_TYPE_FIND_POSSIBLE + 5,
4054 "image/x-degas", NULL);
4059 /*** generic typefind for streams that have some data at a specific position***/
4070 start_with_type_find (GstTypeFind * tf, gpointer private)
4072 GstTypeFindData *start_with = (GstTypeFindData *) private;
4075 GST_LOG ("trying to find mime type %s with the first %u bytes of data",
4076 gst_structure_get_name (gst_caps_get_structure (start_with->caps, 0)),
4078 data = gst_type_find_peek (tf, 0, start_with->size);
4079 if (data && memcmp (data, start_with->data, start_with->size) == 0) {
4080 gst_type_find_suggest (tf, start_with->probability, start_with->caps);
4085 sw_data_destroy (GstTypeFindData * sw_data)
4087 if (G_LIKELY (sw_data->caps != NULL))
4088 gst_caps_unref (sw_data->caps);
4092 #define TYPE_FIND_REGISTER_START_WITH(plugin,name,rank,ext,_data,_size,_probability)\
4094 GstTypeFindData *sw_data = g_new (GstTypeFindData, 1); \
4095 sw_data->data = (const guint8 *)_data; \
4096 sw_data->size = _size; \
4097 sw_data->probability = _probability; \
4098 sw_data->caps = gst_caps_new_simple (name, NULL); \
4099 if (!gst_type_find_register (plugin, name, rank, start_with_type_find,\
4100 (char **) ext, sw_data->caps, sw_data, \
4101 (GDestroyNotify) (sw_data_destroy))) { \
4102 gst_caps_unref (sw_data->caps); \
4107 /*** same for riff types ***/
4110 riff_type_find (GstTypeFind * tf, gpointer private)
4112 GstTypeFindData *riff_data = (GstTypeFindData *) private;
4113 guint8 *data = gst_type_find_peek (tf, 0, 12);
4115 if (data && (memcmp (data, "RIFF", 4) == 0 || memcmp (data, "AVF0", 4) == 0)) {
4117 if (memcmp (data, riff_data->data, 4) == 0)
4118 gst_type_find_suggest (tf, riff_data->probability, riff_data->caps);
4122 #define TYPE_FIND_REGISTER_RIFF(plugin,name,rank,ext,_data) \
4124 GstTypeFindData *sw_data = g_new (GstTypeFindData, 1); \
4125 sw_data->data = (gpointer)_data; \
4126 sw_data->size = 4; \
4127 sw_data->probability = GST_TYPE_FIND_MAXIMUM; \
4128 sw_data->caps = gst_caps_new_simple (name, NULL); \
4129 if (!gst_type_find_register (plugin, name, rank, riff_type_find, \
4130 (char **) ext, sw_data->caps, sw_data, \
4131 (GDestroyNotify) (sw_data_destroy))) { \
4132 gst_caps_unref (sw_data->caps); \
4138 /*** plugin initialization ***/
4140 #define TYPE_FIND_REGISTER(plugin,name,rank,func,ext,caps,priv,notify) \
4142 if (!gst_type_find_register (plugin, name, rank, func, (char **) ext, caps, priv, notify))\
4148 plugin_init (GstPlugin * plugin)
4150 /* can't initialize this via a struct as caps can't be statically initialized */
4152 /* note: asx/wax/wmx are XML files, asf doesn't handle them */
4153 /* FIXME-0.11: these should be const,
4154 this requires gstreamer/gst/gsttypefind::gst_type_find_register()
4155 to have define the parameter as const
4157 static const gchar *asf_exts[] = { "asf", "wm", "wma", "wmv", NULL };
4158 static const gchar *au_exts[] = { "au", "snd", NULL };
4159 static const gchar *avi_exts[] = { "avi", NULL };
4160 static const gchar *qcp_exts[] = { "qcp", NULL };
4161 static const gchar *cdxa_exts[] = { "dat", NULL };
4162 static const gchar *flac_exts[] = { "flac", NULL };
4163 static const gchar *flx_exts[] = { "flc", "fli", NULL };
4164 static const gchar *id3_exts[] =
4165 { "mp3", "mp2", "mp1", "mpga", "ogg", "flac", "tta", NULL };
4166 static const gchar *apetag_exts[] = { "mp3", "ape", "mpc", "wv", NULL };
4167 static const gchar *tta_exts[] = { "tta", NULL };
4168 static const gchar *mod_exts[] = { "669", "amf", "dsm", "gdm", "far", "imf",
4169 "it", "med", "mod", "mtm", "okt", "sam",
4170 "s3m", "stm", "stx", "ult", "xm", NULL
4172 static const gchar *mp3_exts[] = { "mp3", "mp2", "mp1", "mpga", NULL };
4173 static const gchar *ac3_exts[] = { "ac3", "eac3", NULL };
4174 static const gchar *dts_exts[] = { "dts", NULL };
4175 static const gchar *gsm_exts[] = { "gsm", NULL };
4176 static const gchar *musepack_exts[] = { "mpc", "mpp", "mp+", NULL };
4177 static const gchar *mpeg_sys_exts[] = { "mpe", "mpeg", "mpg", NULL };
4178 static const gchar *mpeg_video_exts[] = { "mpv", "mpeg", "mpg", NULL };
4179 static const gchar *mpeg_ts_exts[] = { "ts", "mts", NULL };
4180 static const gchar *ogg_exts[] = { "anx", "ogg", "ogm", NULL };
4181 static const gchar *qt_exts[] = { "mov", NULL };
4182 static const gchar *qtif_exts[] = { "qif", "qtif", "qti", NULL };
4183 static const gchar *mj2_exts[] = { "mj2", NULL };
4184 static const gchar *jp2_exts[] = { "jp2", NULL };
4185 static const gchar *rm_exts[] = { "ra", "ram", "rm", "rmvb", NULL };
4186 static const gchar *swf_exts[] = { "swf", "swfl", NULL };
4187 static const gchar *utf8_exts[] = { "txt", NULL };
4188 static const gchar *wav_exts[] = { "wav", NULL };
4189 static const gchar *aiff_exts[] = { "aiff", "aif", "aifc", NULL };
4190 static const gchar *svx_exts[] = { "iff", "svx", NULL };
4191 static const gchar *paris_exts[] = { "paf", NULL };
4192 static const gchar *nist_exts[] = { "nist", NULL };
4193 static const gchar *voc_exts[] = { "voc", NULL };
4194 static const gchar *sds_exts[] = { "sds", NULL };
4195 static const gchar *ircam_exts[] = { "sf", NULL };
4196 static const gchar *w64_exts[] = { "w64", NULL };
4197 static const gchar *shn_exts[] = { "shn", NULL };
4198 static const gchar *ape_exts[] = { "ape", NULL };
4199 static const gchar *uri_exts[] = { "ram", NULL };
4200 static const gchar *m3u8_exts[] = { "m3u8", NULL };
4201 static const gchar *sdp_exts[] = { "sdp", NULL };
4202 static const gchar *smil_exts[] = { "smil", NULL };
4203 static const gchar *html_exts[] = { "htm", "html", NULL };
4204 static const gchar *xml_exts[] = { "xml", NULL };
4205 static const gchar *jpeg_exts[] = { "jpg", "jpe", "jpeg", NULL };
4206 static const gchar *gif_exts[] = { "gif", NULL };
4207 static const gchar *png_exts[] = { "png", NULL };
4208 static const gchar *bmp_exts[] = { "bmp", NULL };
4209 static const gchar *tiff_exts[] = { "tif", "tiff", NULL };
4210 static const gchar *matroska_exts[] = { "mkv", "mka", NULL };
4211 static const gchar *webm_exts[] = { "webm", NULL };
4212 static const gchar *mve_exts[] = { "mve", NULL };
4213 static const gchar *dv_exts[] = { "dv", "dif", NULL };
4214 static const gchar *amr_exts[] = { "amr", NULL };
4215 static const gchar *ilbc_exts[] = { "ilbc", NULL };
4216 static const gchar *sid_exts[] = { "sid", NULL };
4217 static const gchar *xcf_exts[] = { "xcf", NULL };
4218 static const gchar *mng_exts[] = { "mng", NULL };
4219 static const gchar *jng_exts[] = { "jng", NULL };
4220 static const gchar *xpm_exts[] = { "xpm", NULL };
4221 static const gchar *pnm_exts[] = { "pnm", "ppm", "pgm", "pbm", NULL };
4222 static const gchar *ras_exts[] = { "ras", NULL };
4223 static const gchar *bz2_exts[] = { "bz2", NULL };
4224 static const gchar *gz_exts[] = { "gz", NULL };
4225 static const gchar *zip_exts[] = { "zip", NULL };
4226 static const gchar *compress_exts[] = { "Z", NULL };
4227 static const gchar *m4a_exts[] = { "m4a", NULL };
4228 static const gchar *q3gp_exts[] = { "3gp", NULL };
4229 static const gchar *aac_exts[] = { "aac", "adts", "adif", "loas", NULL };
4230 static const gchar *spc_exts[] = { "spc", NULL };
4231 static const gchar *wavpack_exts[] = { "wv", "wvp", NULL };
4232 static const gchar *wavpack_correction_exts[] = { "wvc", NULL };
4233 static const gchar *rar_exts[] = { "rar", NULL };
4234 static const gchar *tar_exts[] = { "tar", NULL };
4235 static const gchar *ar_exts[] = { "a", NULL };
4236 static const gchar *msdos_exts[] = { "dll", "exe", "ocx", "sys", "scr",
4237 "msstyles", "cpl", NULL
4239 static const gchar *flv_exts[] = { "flv", NULL };
4240 static const gchar *m4v_exts[] = { "m4v", NULL };
4241 static const gchar *h263_exts[] = { "h263", "263", NULL };
4242 static const gchar *h264_exts[] = { "h264", "x264", "264", NULL };
4243 static const gchar *nuv_exts[] = { "nuv", NULL };
4244 static const gchar *vivo_exts[] = { "viv", NULL };
4245 static const gchar *nsf_exts[] = { "nsf", NULL };
4246 static const gchar *gym_exts[] = { "gym", NULL };
4247 static const gchar *ay_exts[] = { "ay", NULL };
4248 static const gchar *gbs_exts[] = { "gbs", NULL };
4249 static const gchar *kss_exts[] = { "kss", NULL };
4250 static const gchar *sap_exts[] = { "sap", NULL };
4251 static const gchar *vgm_exts[] = { "vgm", NULL };
4252 static const gchar *mid_exts[] = { "mid", "midi", NULL };
4253 static const gchar *mxmf_exts[] = { "mxmf", NULL };
4254 static const gchar *imelody_exts[] = { "imy", "ime", "imelody", NULL };
4255 static const gchar *pdf_exts[] = { "pdf", NULL };
4256 static const gchar *ps_exts[] = { "ps", NULL };
4257 static const gchar *svg_exts[] = { "svg", NULL };
4258 static const gchar *mxf_exts[] = { "mxf", NULL };
4259 static const gchar *ivf_exts[] = { "ivf", NULL };
4260 static const gchar *msword_exts[] = { "doc", NULL };
4261 static const gchar *dsstore_exts[] = { "DS_Store", NULL };
4262 static const gchar *psd_exts[] = { "psd", NULL };
4263 static const gchar *y4m_exts[] = { "y4m", NULL };
4265 GST_DEBUG_CATEGORY_INIT (type_find_debug, "typefindfunctions",
4266 GST_DEBUG_FG_GREEN | GST_DEBUG_BG_RED, "generic type find functions");
4268 /* must use strings, macros don't accept initializers */
4269 TYPE_FIND_REGISTER_START_WITH (plugin, "video/x-ms-asf", GST_RANK_SECONDARY,
4271 "\060\046\262\165\216\146\317\021\246\331\000\252\000\142\316\154", 16,
4272 GST_TYPE_FIND_MAXIMUM);
4273 TYPE_FIND_REGISTER (plugin, "audio/x-musepack", GST_RANK_PRIMARY,
4274 musepack_type_find, musepack_exts, MUSEPACK_CAPS, NULL, NULL);
4275 TYPE_FIND_REGISTER (plugin, "audio/x-au", GST_RANK_MARGINAL,
4276 au_type_find, au_exts, AU_CAPS, NULL, NULL);
4277 TYPE_FIND_REGISTER_RIFF (plugin, "video/x-msvideo", GST_RANK_PRIMARY,
4279 TYPE_FIND_REGISTER_RIFF (plugin, "audio/qcelp", GST_RANK_PRIMARY,
4281 TYPE_FIND_REGISTER_RIFF (plugin, "video/x-cdxa", GST_RANK_PRIMARY,
4283 TYPE_FIND_REGISTER_START_WITH (plugin, "video/x-vcd", GST_RANK_PRIMARY,
4284 cdxa_exts, "\000\377\377\377\377\377\377\377\377\377\377\000", 12,
4285 GST_TYPE_FIND_MAXIMUM);
4286 TYPE_FIND_REGISTER_START_WITH (plugin, "audio/x-imelody", GST_RANK_PRIMARY,
4287 imelody_exts, "BEGIN:IMELODY", 13, GST_TYPE_FIND_MAXIMUM);
4289 TYPE_FIND_REGISTER_START_WITH (plugin, "video/x-smoke", GST_RANK_PRIMARY,
4290 NULL, "\x80smoke\x00\x01\x00", 6, GST_TYPE_FIND_MAXIMUM);
4292 TYPE_FIND_REGISTER (plugin, "audio/midi", GST_RANK_PRIMARY, mid_type_find,
4293 mid_exts, MID_CAPS, NULL, NULL);
4294 TYPE_FIND_REGISTER_RIFF (plugin, "audio/riff-midi", GST_RANK_PRIMARY,
4296 TYPE_FIND_REGISTER (plugin, "audio/mobile-xmf", GST_RANK_PRIMARY,
4297 mxmf_type_find, mxmf_exts, MXMF_CAPS, NULL, NULL);
4298 TYPE_FIND_REGISTER (plugin, "video/x-fli", GST_RANK_MARGINAL, flx_type_find,
4299 flx_exts, FLX_CAPS, NULL, NULL);
4300 TYPE_FIND_REGISTER (plugin, "application/x-id3v2", GST_RANK_PRIMARY + 103,
4301 id3v2_type_find, id3_exts, ID3_CAPS, NULL, NULL);
4302 TYPE_FIND_REGISTER (plugin, "application/x-id3v1", GST_RANK_PRIMARY + 101,
4303 id3v1_type_find, id3_exts, ID3_CAPS, NULL, NULL);
4304 TYPE_FIND_REGISTER (plugin, "application/x-apetag", GST_RANK_PRIMARY + 102,
4305 apetag_type_find, apetag_exts, APETAG_CAPS, NULL, NULL);
4306 TYPE_FIND_REGISTER (plugin, "audio/x-ttafile", GST_RANK_PRIMARY,
4307 tta_type_find, tta_exts, TTA_CAPS, NULL, NULL);
4308 TYPE_FIND_REGISTER (plugin, "audio/x-mod", GST_RANK_SECONDARY, mod_type_find,
4309 mod_exts, MOD_CAPS, NULL, NULL);
4310 TYPE_FIND_REGISTER (plugin, "audio/mpeg", GST_RANK_PRIMARY, mp3_type_find,
4311 mp3_exts, MP3_CAPS, NULL, NULL);
4312 TYPE_FIND_REGISTER (plugin, "audio/x-ac3", GST_RANK_PRIMARY, ac3_type_find,
4313 ac3_exts, AC3_CAPS, NULL, NULL);
4314 TYPE_FIND_REGISTER (plugin, "audio/x-dts", GST_RANK_SECONDARY, dts_type_find,
4315 dts_exts, DTS_CAPS, NULL, NULL);
4316 TYPE_FIND_REGISTER (plugin, "audio/x-gsm", GST_RANK_PRIMARY, NULL, gsm_exts,
4317 GSM_CAPS, NULL, NULL);
4318 TYPE_FIND_REGISTER (plugin, "video/mpeg-sys", GST_RANK_PRIMARY,
4319 mpeg_sys_type_find, mpeg_sys_exts, MPEG_SYS_CAPS, NULL, NULL);
4320 TYPE_FIND_REGISTER (plugin, "video/mpegts", GST_RANK_PRIMARY,
4321 mpeg_ts_type_find, mpeg_ts_exts, MPEGTS_CAPS, NULL, NULL);
4322 TYPE_FIND_REGISTER (plugin, "application/ogg", GST_RANK_PRIMARY,
4323 ogganx_type_find, ogg_exts, OGGANX_CAPS, NULL, NULL);
4324 TYPE_FIND_REGISTER (plugin, "video/mpeg-elementary", GST_RANK_MARGINAL,
4325 mpeg_video_stream_type_find, mpeg_video_exts, MPEG_VIDEO_CAPS, NULL,
4327 TYPE_FIND_REGISTER (plugin, "video/mpeg4", GST_RANK_PRIMARY,
4328 mpeg4_video_type_find, m4v_exts, MPEG_VIDEO_CAPS, NULL, NULL);
4329 TYPE_FIND_REGISTER (plugin, "video/x-h263", GST_RANK_SECONDARY,
4330 h263_video_type_find, h263_exts, H263_VIDEO_CAPS, NULL, NULL);
4331 TYPE_FIND_REGISTER (plugin, "video/x-h264", GST_RANK_PRIMARY,
4332 h264_video_type_find, h264_exts, H264_VIDEO_CAPS, NULL, NULL);
4333 TYPE_FIND_REGISTER (plugin, "video/x-nuv", GST_RANK_SECONDARY, nuv_type_find,
4334 nuv_exts, NUV_CAPS, NULL, NULL);
4337 TYPE_FIND_REGISTER (plugin, "audio/x-m4a", GST_RANK_PRIMARY, m4a_type_find,
4338 m4a_exts, M4A_CAPS, NULL, NULL);
4339 TYPE_FIND_REGISTER (plugin, "application/x-3gp", GST_RANK_PRIMARY,
4340 q3gp_type_find, q3gp_exts, Q3GP_CAPS, NULL, NULL);
4341 TYPE_FIND_REGISTER (plugin, "video/quicktime", GST_RANK_SECONDARY,
4342 qt_type_find, qt_exts, QT_CAPS, NULL, NULL);
4343 TYPE_FIND_REGISTER (plugin, "image/x-quicktime", GST_RANK_SECONDARY,
4344 qtif_type_find, qtif_exts, QTIF_CAPS, NULL, NULL);
4345 TYPE_FIND_REGISTER (plugin, "image/jp2", GST_RANK_PRIMARY,
4346 jp2_type_find, jp2_exts, JP2_CAPS, NULL, NULL);
4347 TYPE_FIND_REGISTER (plugin, "video/mj2", GST_RANK_PRIMARY,
4348 jp2_type_find, mj2_exts, MJ2_CAPS, NULL, NULL);
4350 TYPE_FIND_REGISTER (plugin, "text/html", GST_RANK_SECONDARY, html_type_find,
4351 html_exts, HTML_CAPS, NULL, NULL);
4352 TYPE_FIND_REGISTER_START_WITH (plugin, "application/vnd.rn-realmedia",
4353 GST_RANK_SECONDARY, rm_exts, ".RMF", 4, GST_TYPE_FIND_MAXIMUM);
4354 TYPE_FIND_REGISTER_START_WITH (plugin, "application/x-pn-realaudio",
4355 GST_RANK_SECONDARY, rm_exts, ".ra\375", 4, GST_TYPE_FIND_MAXIMUM);
4356 TYPE_FIND_REGISTER (plugin, "application/x-shockwave-flash",
4357 GST_RANK_SECONDARY, swf_type_find, swf_exts, SWF_CAPS, NULL, NULL);
4358 TYPE_FIND_REGISTER_START_WITH (plugin, "video/x-flv", GST_RANK_SECONDARY,
4359 flv_exts, "FLV", 3, GST_TYPE_FIND_MAXIMUM);
4360 TYPE_FIND_REGISTER (plugin, "text/plain", GST_RANK_MARGINAL, utf8_type_find,
4361 utf8_exts, UTF8_CAPS, NULL, NULL);
4362 TYPE_FIND_REGISTER (plugin, "text/uri-list", GST_RANK_MARGINAL, uri_type_find,
4363 uri_exts, URI_CAPS, NULL, NULL);
4364 TYPE_FIND_REGISTER (plugin, "playlist/m3u8", GST_RANK_MARGINAL,
4365 m3u8_type_find, m3u8_exts, M3U8_CAPS, NULL, NULL);
4366 TYPE_FIND_REGISTER (plugin, "application/sdp", GST_RANK_SECONDARY,
4367 sdp_type_find, sdp_exts, SDP_CAPS, NULL, NULL);
4368 TYPE_FIND_REGISTER (plugin, "application/smil", GST_RANK_SECONDARY,
4369 smil_type_find, smil_exts, SMIL_CAPS, NULL, NULL);
4370 TYPE_FIND_REGISTER (plugin, "application/xml", GST_RANK_MARGINAL,
4371 xml_type_find, xml_exts, GENERIC_XML_CAPS, NULL, NULL);
4372 TYPE_FIND_REGISTER_RIFF (plugin, "audio/x-wav", GST_RANK_PRIMARY, wav_exts,
4374 TYPE_FIND_REGISTER (plugin, "audio/x-aiff", GST_RANK_SECONDARY,
4375 aiff_type_find, aiff_exts, AIFF_CAPS, NULL, NULL);
4376 TYPE_FIND_REGISTER (plugin, "audio/x-svx", GST_RANK_SECONDARY, svx_type_find,
4377 svx_exts, SVX_CAPS, NULL, NULL);
4378 TYPE_FIND_REGISTER (plugin, "audio/x-paris", GST_RANK_SECONDARY,
4379 paris_type_find, paris_exts, PARIS_CAPS, NULL, NULL);
4380 TYPE_FIND_REGISTER_START_WITH (plugin, "audio/x-nist", GST_RANK_SECONDARY,
4381 nist_exts, "NIST", 4, GST_TYPE_FIND_MAXIMUM);
4382 TYPE_FIND_REGISTER_START_WITH (plugin, "audio/x-voc", GST_RANK_SECONDARY,
4383 voc_exts, "Creative", 8, GST_TYPE_FIND_MAXIMUM);
4384 TYPE_FIND_REGISTER (plugin, "audio/x-sds", GST_RANK_SECONDARY, sds_type_find,
4385 sds_exts, SDS_CAPS, NULL, NULL);
4386 TYPE_FIND_REGISTER (plugin, "audio/x-ircam", GST_RANK_SECONDARY,
4387 ircam_type_find, ircam_exts, IRCAM_CAPS, NULL, NULL);
4388 TYPE_FIND_REGISTER_START_WITH (plugin, "audio/x-w64", GST_RANK_SECONDARY,
4389 w64_exts, "riff", 4, GST_TYPE_FIND_MAXIMUM);
4390 TYPE_FIND_REGISTER (plugin, "audio/x-shorten", GST_RANK_SECONDARY,
4391 shn_type_find, shn_exts, SHN_CAPS, NULL, NULL);
4392 TYPE_FIND_REGISTER (plugin, "application/x-ape", GST_RANK_SECONDARY,
4393 ape_type_find, ape_exts, APE_CAPS, NULL, NULL);
4394 TYPE_FIND_REGISTER (plugin, "image/jpeg", GST_RANK_PRIMARY + 15,
4395 jpeg_type_find, jpeg_exts, JPEG_CAPS, NULL, NULL);
4396 TYPE_FIND_REGISTER_START_WITH (plugin, "image/gif", GST_RANK_PRIMARY,
4397 gif_exts, "GIF8", 4, GST_TYPE_FIND_MAXIMUM);
4398 TYPE_FIND_REGISTER_START_WITH (plugin, "image/png", GST_RANK_PRIMARY + 14,
4399 png_exts, "\211PNG\015\012\032\012", 8, GST_TYPE_FIND_MAXIMUM);
4400 TYPE_FIND_REGISTER (plugin, "image/bmp", GST_RANK_PRIMARY, bmp_type_find,
4401 bmp_exts, BMP_CAPS, NULL, NULL);
4402 TYPE_FIND_REGISTER (plugin, "image/tiff", GST_RANK_PRIMARY, tiff_type_find,
4403 tiff_exts, TIFF_CAPS, NULL, NULL);
4404 TYPE_FIND_REGISTER (plugin, "image/x-portable-pixmap", GST_RANK_SECONDARY,
4405 pnm_type_find, pnm_exts, PNM_CAPS, NULL, NULL);
4406 TYPE_FIND_REGISTER (plugin, "video/x-matroska", GST_RANK_PRIMARY,
4407 matroska_type_find, matroska_exts, MATROSKA_CAPS, NULL, NULL);
4408 TYPE_FIND_REGISTER (plugin, "video/webm", GST_RANK_PRIMARY,
4409 webm_type_find, webm_exts, WEBM_CAPS, NULL, NULL);
4410 TYPE_FIND_REGISTER (plugin, "application/mxf", GST_RANK_PRIMARY,
4411 mxf_type_find, mxf_exts, MXF_CAPS, NULL, NULL);
4412 TYPE_FIND_REGISTER_START_WITH (plugin, "video/x-mve", GST_RANK_SECONDARY,
4413 mve_exts, "Interplay MVE File\032\000\032\000\000\001\063\021", 26,
4414 GST_TYPE_FIND_MAXIMUM);
4415 TYPE_FIND_REGISTER (plugin, "video/x-dv", GST_RANK_SECONDARY, dv_type_find,
4416 dv_exts, DV_CAPS, NULL, NULL);
4417 TYPE_FIND_REGISTER_START_WITH (plugin, "audio/x-amr-nb-sh", GST_RANK_PRIMARY,
4418 amr_exts, "#!AMR", 5, GST_TYPE_FIND_LIKELY);
4419 TYPE_FIND_REGISTER_START_WITH (plugin, "audio/x-amr-wb-sh", GST_RANK_PRIMARY,
4420 amr_exts, "#!AMR-WB", 7, GST_TYPE_FIND_MAXIMUM);
4421 TYPE_FIND_REGISTER (plugin, "audio/iLBC-sh", GST_RANK_PRIMARY,
4422 ilbc_type_find, ilbc_exts, ILBC_CAPS, NULL, NULL);
4423 TYPE_FIND_REGISTER_START_WITH (plugin, "audio/x-sid", GST_RANK_MARGINAL,
4424 sid_exts, "PSID", 4, GST_TYPE_FIND_MAXIMUM);
4425 TYPE_FIND_REGISTER_START_WITH (plugin, "image/x-xcf", GST_RANK_SECONDARY,
4426 xcf_exts, "gimp xcf", 8, GST_TYPE_FIND_MAXIMUM);
4427 TYPE_FIND_REGISTER_START_WITH (plugin, "video/x-mng", GST_RANK_SECONDARY,
4428 mng_exts, "\212MNG\015\012\032\012", 8, GST_TYPE_FIND_MAXIMUM);
4429 TYPE_FIND_REGISTER_START_WITH (plugin, "image/x-jng", GST_RANK_SECONDARY,
4430 jng_exts, "\213JNG\015\012\032\012", 8, GST_TYPE_FIND_MAXIMUM);
4431 TYPE_FIND_REGISTER_START_WITH (plugin, "image/x-xpixmap", GST_RANK_SECONDARY,
4432 xpm_exts, "/* XPM */", 9, GST_TYPE_FIND_MAXIMUM);
4433 TYPE_FIND_REGISTER_START_WITH (plugin, "image/x-sun-raster",
4434 GST_RANK_SECONDARY, ras_exts, "\131\246\152\225", 4,
4435 GST_TYPE_FIND_MAXIMUM);
4436 TYPE_FIND_REGISTER_START_WITH (plugin, "application/x-bzip",
4437 GST_RANK_SECONDARY, bz2_exts, "BZh", 3, GST_TYPE_FIND_LIKELY);
4438 TYPE_FIND_REGISTER_START_WITH (plugin, "application/x-gzip",
4439 GST_RANK_SECONDARY, gz_exts, "\037\213", 2, GST_TYPE_FIND_LIKELY);
4440 TYPE_FIND_REGISTER_START_WITH (plugin, "application/zip", GST_RANK_SECONDARY,
4441 zip_exts, "PK\003\004", 4, GST_TYPE_FIND_LIKELY);
4442 TYPE_FIND_REGISTER_START_WITH (plugin, "application/x-compress",
4443 GST_RANK_SECONDARY, compress_exts, "\037\235", 2, GST_TYPE_FIND_LIKELY);
4444 TYPE_FIND_REGISTER (plugin, "subtitle/x-kate", GST_RANK_MARGINAL,
4445 kate_type_find, NULL, NULL, NULL, NULL);
4446 TYPE_FIND_REGISTER (plugin, "audio/x-flac", GST_RANK_PRIMARY,
4447 flac_type_find, flac_exts, FLAC_CAPS, NULL, NULL);
4448 TYPE_FIND_REGISTER (plugin, "audio/x-vorbis", GST_RANK_PRIMARY,
4449 vorbis_type_find, NULL, VORBIS_CAPS, NULL, NULL);
4450 TYPE_FIND_REGISTER (plugin, "video/x-theora", GST_RANK_PRIMARY,
4451 theora_type_find, NULL, THEORA_CAPS, NULL, NULL);
4452 TYPE_FIND_REGISTER (plugin, "application/x-ogm-video", GST_RANK_PRIMARY,
4453 ogmvideo_type_find, NULL, OGMVIDEO_CAPS, NULL, NULL);
4454 TYPE_FIND_REGISTER (plugin, "application/x-ogm-audio", GST_RANK_PRIMARY,
4455 ogmaudio_type_find, NULL, OGMAUDIO_CAPS, NULL, NULL);
4456 TYPE_FIND_REGISTER (plugin, "application/x-ogm-text", GST_RANK_PRIMARY,
4457 ogmtext_type_find, NULL, OGMTEXT_CAPS, NULL, NULL);
4458 TYPE_FIND_REGISTER (plugin, "audio/x-speex", GST_RANK_PRIMARY,
4459 speex_type_find, NULL, SPEEX_CAPS, NULL, NULL);
4460 TYPE_FIND_REGISTER (plugin, "audio/x-celt", GST_RANK_PRIMARY,
4461 celt_type_find, NULL, CELT_CAPS, NULL, NULL);
4462 TYPE_FIND_REGISTER (plugin, "application/x-ogg-skeleton", GST_RANK_PRIMARY,
4463 oggskel_type_find, NULL, OGG_SKELETON_CAPS, NULL, NULL);
4464 TYPE_FIND_REGISTER (plugin, "text/x-cmml", GST_RANK_PRIMARY, cmml_type_find,
4465 NULL, CMML_CAPS, NULL, NULL);
4466 TYPE_FIND_REGISTER_START_WITH (plugin, "application/x-executable",
4467 GST_RANK_MARGINAL, NULL, "\177ELF", 4, GST_TYPE_FIND_MAXIMUM);
4468 TYPE_FIND_REGISTER (plugin, "audio/aac", GST_RANK_SECONDARY,
4469 aac_type_find, aac_exts, AAC_CAPS, NULL, NULL);
4470 TYPE_FIND_REGISTER_START_WITH (plugin, "audio/x-spc", GST_RANK_SECONDARY,
4471 spc_exts, "SNES-SPC700 Sound File Data", 27, GST_TYPE_FIND_MAXIMUM);
4472 TYPE_FIND_REGISTER (plugin, "audio/x-wavpack", GST_RANK_SECONDARY,
4473 wavpack_type_find, wavpack_exts, WAVPACK_CAPS, NULL, NULL);
4474 TYPE_FIND_REGISTER (plugin, "audio/x-wavpack-correction", GST_RANK_SECONDARY,
4475 wavpack_type_find, wavpack_correction_exts, WAVPACK_CORRECTION_CAPS, NULL,
4477 TYPE_FIND_REGISTER (plugin, "application/postscript", GST_RANK_SECONDARY,
4478 postscript_type_find, ps_exts, POSTSCRIPT_CAPS, NULL, NULL);
4479 TYPE_FIND_REGISTER (plugin, "image/svg+xml", GST_RANK_SECONDARY,
4480 svg_type_find, svg_exts, SVG_CAPS, NULL, NULL);
4481 TYPE_FIND_REGISTER_START_WITH (plugin, "application/x-rar",
4482 GST_RANK_SECONDARY, rar_exts, "Rar!", 4, GST_TYPE_FIND_LIKELY);
4483 TYPE_FIND_REGISTER (plugin, "application/x-tar", GST_RANK_SECONDARY,
4484 tar_type_find, tar_exts, TAR_CAPS, NULL, NULL);
4485 TYPE_FIND_REGISTER (plugin, "application/x-ar", GST_RANK_SECONDARY,
4486 ar_type_find, ar_exts, AR_CAPS, NULL, NULL);
4487 TYPE_FIND_REGISTER (plugin, "application/x-ms-dos-executable",
4488 GST_RANK_SECONDARY, msdos_type_find, msdos_exts, MSDOS_CAPS, NULL, NULL);
4489 TYPE_FIND_REGISTER (plugin, "video/x-dirac", GST_RANK_PRIMARY,
4490 dirac_type_find, NULL, DIRAC_CAPS, NULL, NULL);
4491 TYPE_FIND_REGISTER (plugin, "multipart/x-mixed-replace", GST_RANK_SECONDARY,
4492 multipart_type_find, NULL, MULTIPART_CAPS, NULL, NULL);
4493 TYPE_FIND_REGISTER (plugin, "application/x-mmsh", GST_RANK_SECONDARY,
4494 mmsh_type_find, NULL, MMSH_CAPS, NULL, NULL);
4495 TYPE_FIND_REGISTER (plugin, "video/vivo", GST_RANK_SECONDARY,
4496 vivo_type_find, vivo_exts, VIVO_CAPS, NULL, NULL);
4497 TYPE_FIND_REGISTER_START_WITH (plugin, "audio/x-nsf",
4498 GST_RANK_SECONDARY, nsf_exts, "NESM\x1a", 5, GST_TYPE_FIND_MAXIMUM);
4499 TYPE_FIND_REGISTER_START_WITH (plugin, "audio/x-gym",
4500 GST_RANK_SECONDARY, gym_exts, "GYMX", 4, GST_TYPE_FIND_MAXIMUM);
4501 TYPE_FIND_REGISTER_START_WITH (plugin, "audio/x-ay",
4502 GST_RANK_SECONDARY, ay_exts, "ZXAYEMUL", 8, GST_TYPE_FIND_MAXIMUM);
4503 TYPE_FIND_REGISTER_START_WITH (plugin, "audio/x-gbs",
4504 GST_RANK_SECONDARY, gbs_exts, "GBS\x01", 4, GST_TYPE_FIND_MAXIMUM);
4505 TYPE_FIND_REGISTER_START_WITH (plugin, "audio/x-vgm",
4506 GST_RANK_SECONDARY, vgm_exts, "Vgm\x20", 4, GST_TYPE_FIND_MAXIMUM);
4507 TYPE_FIND_REGISTER_START_WITH (plugin, "audio/x-sap",
4508 GST_RANK_SECONDARY, sap_exts, "SAP\x0d\x0aAUTHOR\x20", 12,
4509 GST_TYPE_FIND_MAXIMUM);
4510 TYPE_FIND_REGISTER_START_WITH (plugin, "video/x-ivf", GST_RANK_SECONDARY,
4511 ivf_exts, "DKIF", 4, GST_TYPE_FIND_NEARLY_CERTAIN);
4512 TYPE_FIND_REGISTER_START_WITH (plugin, "audio/x-kss", GST_RANK_SECONDARY,
4513 kss_exts, "KSSX\0", 5, GST_TYPE_FIND_MAXIMUM);
4514 TYPE_FIND_REGISTER_START_WITH (plugin, "application/pdf", GST_RANK_SECONDARY,
4515 pdf_exts, "%PDF-", 5, GST_TYPE_FIND_LIKELY);
4516 TYPE_FIND_REGISTER_START_WITH (plugin, "application/msword",
4517 GST_RANK_SECONDARY, msword_exts, "\320\317\021\340\241\261\032\341", 8,
4518 GST_TYPE_FIND_LIKELY);
4519 /* Mac OS X .DS_Store files tend to be taken for video/mpeg */
4520 TYPE_FIND_REGISTER_START_WITH (plugin, "application/octet-stream",
4521 GST_RANK_SECONDARY, dsstore_exts, "\000\000\000\001Bud1", 8,
4522 GST_TYPE_FIND_LIKELY);
4523 TYPE_FIND_REGISTER_START_WITH (plugin, "image/vnd.adobe.photoshop",
4524 GST_RANK_SECONDARY, psd_exts, "8BPS\000\001\000\000\000\000", 10,
4525 GST_TYPE_FIND_LIKELY);
4526 TYPE_FIND_REGISTER_START_WITH (plugin, "application/x-yuv4mpeg",
4527 GST_RANK_SECONDARY, y4m_exts, "YUV4MPEG2 ", 10, GST_TYPE_FIND_LIKELY);
4528 TYPE_FIND_REGISTER (plugin, "image/x-icon", GST_RANK_MARGINAL,
4529 windows_icon_typefind, NULL, NULL, NULL, NULL);
4532 TYPE_FIND_REGISTER (plugin, "xdgmime-base", GST_RANK_MARGINAL,
4533 xdgmime_typefind, NULL, NULL, NULL, NULL);
4536 TYPE_FIND_REGISTER (plugin, "image/x-degas", GST_RANK_MARGINAL,
4537 degas_type_find, NULL, NULL, NULL, NULL);
4542 GST_PLUGIN_DEFINE (GST_VERSION_MAJOR,
4544 "typefindfunctions",
4545 "default typefind functions",
4546 plugin_init, VERSION, GST_LICENSE, GST_PACKAGE_NAME, GST_PACKAGE_ORIGIN)