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);
270 /*** application/xml **********************************************************/
272 #define XML_BUFFER_SIZE 16
273 #define XML_INC_BUFFER { \
275 if (pos == XML_BUFFER_SIZE) { \
277 offset += XML_BUFFER_SIZE; \
278 data = gst_type_find_peek (tf, offset, XML_BUFFER_SIZE); \
279 if (data == NULL) return FALSE; \
286 xml_check_first_element (GstTypeFind * tf, const gchar * element, guint elen,
294 data = gst_type_find_peek (tf, 0, XML_BUFFER_SIZE);
298 /* look for the XMLDec
299 * see XML spec 2.8, Prolog and Document Type Declaration
300 * http://www.w3.org/TR/2004/REC-xml-20040204/#sec-prolog-dtd */
301 got_xmldec = (memcmp (data, "<?xml", 5) == 0);
303 if (strict && !got_xmldec)
306 /* skip XMLDec in any case if we've got one */
312 /* look for the first element, it has to be the requested element. Bail
313 * out if it is not within the first 4kB. */
314 while (data && (offset + pos) < 4096) {
315 while (*data != '<' && (offset + pos) < 4096) {
320 if (!g_ascii_isalpha (*data)) {
321 /* if not alphabetic, it's a PI or an element / attribute declaration
322 * like <?xxx or <!xxx */
327 /* the first normal element, check if it's the one asked for */
328 data = gst_type_find_peek (tf, offset + pos, elen + 1);
329 return (data && element && strncmp ((char *) data, element, elen) == 0);
335 static GstStaticCaps generic_xml_caps = GST_STATIC_CAPS ("application/xml");
337 #define GENERIC_XML_CAPS (gst_static_caps_get(&generic_xml_caps))
339 xml_type_find (GstTypeFind * tf, gpointer unused)
341 if (xml_check_first_element (tf, "", 0, TRUE)) {
342 gst_type_find_suggest (tf, GST_TYPE_FIND_MINIMUM, GENERIC_XML_CAPS);
346 /*** application/sdp *********************************************************/
348 static GstStaticCaps sdp_caps = GST_STATIC_CAPS ("application/sdp");
350 #define SDP_CAPS (gst_static_caps_get(&sdp_caps))
352 sdp_check_header (GstTypeFind * tf)
356 data = gst_type_find_peek (tf, 0, 5);
360 /* sdp must start with v=0[\r]\n */
361 if (memcmp (data, "v=0", 3))
364 if (data[3] == '\r' && data[4] == '\n')
373 sdp_type_find (GstTypeFind * tf, gpointer unused)
375 if (sdp_check_header (tf))
376 gst_type_find_suggest (tf, GST_TYPE_FIND_MAXIMUM, SDP_CAPS);
379 /*** application/smil *********************************************************/
381 static GstStaticCaps smil_caps = GST_STATIC_CAPS ("application/smil");
383 #define SMIL_CAPS (gst_static_caps_get(&smil_caps))
385 smil_type_find (GstTypeFind * tf, gpointer unused)
387 if (xml_check_first_element (tf, "smil", 4, FALSE)) {
388 gst_type_find_suggest (tf, GST_TYPE_FIND_MAXIMUM, SMIL_CAPS);
394 static GstStaticCaps html_caps = GST_STATIC_CAPS ("text/html");
396 #define HTML_CAPS gst_static_caps_get (&html_caps)
399 html_type_find (GstTypeFind * tf, gpointer unused)
403 data = (gchar *) gst_type_find_peek (tf, 0, 16);
407 if (!g_ascii_strncasecmp (data, "<!DOCTYPE HTML", 14)) {
408 gst_type_find_suggest (tf, GST_TYPE_FIND_MAXIMUM, HTML_CAPS);
409 } else if (xml_check_first_element (tf, "html", 4, FALSE)) {
410 gst_type_find_suggest (tf, GST_TYPE_FIND_MAXIMUM, HTML_CAPS);
411 } else if ((d = memchr (data, '<', 16))) {
412 data = (gchar *) gst_type_find_peek (tf, d - data, 6);
413 if (data && g_ascii_strncasecmp (data, "<html>", 6) == 0) {
414 gst_type_find_suggest (tf, GST_TYPE_FIND_MAXIMUM, HTML_CAPS);
421 static GstStaticCaps mid_caps = GST_STATIC_CAPS ("audio/midi");
423 #define MID_CAPS gst_static_caps_get(&mid_caps)
425 mid_type_find (GstTypeFind * tf, gpointer unused)
427 guint8 *data = gst_type_find_peek (tf, 0, 4);
429 /* http://jedi.ks.uiuc.edu/~johns/links/music/midifile.html */
430 if (data && data[0] == 'M' && data[1] == 'T' && data[2] == 'h'
432 gst_type_find_suggest (tf, GST_TYPE_FIND_MAXIMUM, MID_CAPS);
435 /*** audio/mobile-xmf ***/
437 static GstStaticCaps mxmf_caps = GST_STATIC_CAPS ("audio/mobile-xmf");
439 #define MXMF_CAPS gst_static_caps_get(&mxmf_caps)
441 mxmf_type_find (GstTypeFind * tf, gpointer unused)
445 /* Search FileId "XMF_" 4 bytes */
446 data = gst_type_find_peek (tf, 0, 4);
447 if (data && data[0] == 'X' && data[1] == 'M' && data[2] == 'F'
449 /* Search Format version "2.00" 4 bytes */
450 data = gst_type_find_peek (tf, 4, 4);
451 if (data && data[0] == '2' && data[1] == '.' && data[2] == '0'
453 /* Search TypeId 2 1 byte */
454 data = gst_type_find_peek (tf, 11, 1);
455 if (data && data[0] == 2) {
456 gst_type_find_suggest (tf, GST_TYPE_FIND_MAXIMUM, MXMF_CAPS);
463 /*** video/x-fli ***/
465 static GstStaticCaps flx_caps = GST_STATIC_CAPS ("video/x-fli");
467 #define FLX_CAPS gst_static_caps_get(&flx_caps)
469 flx_type_find (GstTypeFind * tf, gpointer unused)
471 guint8 *data = gst_type_find_peek (tf, 0, 134);
474 /* check magic and the frame type of the first frame */
475 if ((data[4] == 0x11 || data[4] == 0x12 ||
476 data[4] == 0x30 || data[4] == 0x44) &&
478 ((data[132] == 0x00 || data[132] == 0xfa) && data[133] == 0xf1)) {
479 gst_type_find_suggest (tf, GST_TYPE_FIND_MAXIMUM, FLX_CAPS);
483 data = gst_type_find_peek (tf, 0, 6);
485 /* check magic only */
486 if ((data[4] == 0x11 || data[4] == 0x12 ||
487 data[4] == 0x30 || data[4] == 0x44) && data[5] == 0xaf) {
488 gst_type_find_suggest (tf, GST_TYPE_FIND_LIKELY, FLX_CAPS);
494 /*** application/x-id3 ***/
496 static GstStaticCaps id3_caps = GST_STATIC_CAPS ("application/x-id3");
498 #define ID3_CAPS gst_static_caps_get(&id3_caps)
500 id3v2_type_find (GstTypeFind * tf, gpointer unused)
502 guint8 *data = gst_type_find_peek (tf, 0, 10);
504 if (data && memcmp (data, "ID3", 3) == 0 &&
505 data[3] != 0xFF && data[4] != 0xFF &&
506 (data[6] & 0x80) == 0 && (data[7] & 0x80) == 0 &&
507 (data[8] & 0x80) == 0 && (data[9] & 0x80) == 0) {
508 gst_type_find_suggest (tf, GST_TYPE_FIND_MAXIMUM, ID3_CAPS);
513 id3v1_type_find (GstTypeFind * tf, gpointer unused)
515 guint8 *data = gst_type_find_peek (tf, -128, 3);
517 if (data && memcmp (data, "TAG", 3) == 0) {
518 gst_type_find_suggest (tf, GST_TYPE_FIND_MAXIMUM, ID3_CAPS);
522 /*** application/x-ape ***/
524 static GstStaticCaps apetag_caps = GST_STATIC_CAPS ("application/x-apetag");
526 #define APETAG_CAPS gst_static_caps_get(&apetag_caps)
528 apetag_type_find (GstTypeFind * tf, gpointer unused)
532 /* APEv1/2 at start of file */
533 data = gst_type_find_peek (tf, 0, 8);
534 if (data && !memcmp (data, "APETAGEX", 8)) {
535 gst_type_find_suggest (tf, GST_TYPE_FIND_MAXIMUM, APETAG_CAPS);
539 /* APEv1/2 at end of file */
540 data = gst_type_find_peek (tf, -32, 8);
541 if (data && !memcmp (data, "APETAGEX", 8)) {
542 gst_type_find_suggest (tf, GST_TYPE_FIND_MAXIMUM, APETAG_CAPS);
547 /*** audio/x-ttafile ***/
549 static GstStaticCaps tta_caps = GST_STATIC_CAPS ("audio/x-ttafile");
551 #define TTA_CAPS gst_static_caps_get(&tta_caps)
553 tta_type_find (GstTypeFind * tf, gpointer unused)
555 guint8 *data = gst_type_find_peek (tf, 0, 3);
558 if (memcmp (data, "TTA", 3) == 0) {
559 gst_type_find_suggest (tf, GST_TYPE_FIND_MAXIMUM, TTA_CAPS);
565 /*** audio/x-flac ***/
566 static GstStaticCaps flac_caps = GST_STATIC_CAPS ("audio/x-flac");
568 #define FLAC_CAPS (gst_static_caps_get(&flac_caps))
571 flac_type_find (GstTypeFind * tf, gpointer unused)
573 DataScanCtx c = { 0, NULL, 0 };
575 if (G_UNLIKELY (!data_scan_ctx_ensure_data (tf, &c, 4)))
578 /* standard flac (also old/broken flac-in-ogg with an initial 4-byte marker
579 * packet and without the usual packet framing) */
580 if (memcmp (c.data, "fLaC", 4) == 0) {
581 gst_type_find_suggest (tf, GST_TYPE_FIND_MAXIMUM, FLAC_CAPS);
585 if (G_UNLIKELY (!data_scan_ctx_ensure_data (tf, &c, 6)))
588 /* flac-in-ogg, see http://flac.sourceforge.net/ogg_mapping.html */
589 if (memcmp (c.data, "\177FLAC\001", 6) == 0) {
590 gst_type_find_suggest (tf, GST_TYPE_FIND_MAXIMUM, FLAC_CAPS);
594 /* disabled because it happily typefinds /dev/urandom as audio/x-flac, and
595 * because I yet have to see header-less flac in the wild */
597 /* flac without headers (subset format) */
598 /* 64K should be enough */
599 while (c.offset < (64 * 1024)) {
600 if (G_UNLIKELY (!data_scan_ctx_ensure_data (tf, &c, 4)))
603 /* look for frame header,
604 * http://flac.sourceforge.net/format.html#frame_header
606 if (c.data[0] == 0xff && (c.data[1] >> 2) == 0x3e) {
607 /* bit 15 in the header must be 0 */
608 if (((c.data[1] >> 1) & 0x01) == 0x01)
611 /* blocksize must be != 0x00 */
612 if ((c.data[2] >> 4) == 0x00)
615 /* samplerate must be != 0x0f */
616 if ((c.data[2] & 0x0f) == 0x0f)
618 /* also 0 is invalid, as it means get the info from the header and we
619 * don't have headers if we are here */
620 if ((c.data[2] & 0x0f) == 0x00)
623 /* channel assignment must be < 11 */
624 if ((c.data[3] >> 4) >= 11)
627 /* sample size must be != 0x07 and != 0x05 */
628 if (((c.data[3] >> 1) & 0x07) == 0x07)
630 if (((c.data[3] >> 1) & 0x07) == 0x05)
632 /* also 0 is invalid, as it means get the info from the header and we
633 * don't have headers if we are here */
634 if (((c.data[3] >> 1) & 0x07) == 0x00)
637 /* next bit must be 0 */
638 if ((c.data[3] & 0x01) == 0x01)
641 /* FIXME: shouldn't we include the crc check ? */
643 GST_DEBUG ("Found flac without headers at %d", (gint) c.offset);
644 gst_type_find_suggest (tf, GST_TYPE_FIND_POSSIBLE, FLAC_CAPS);
648 data_scan_ctx_advance (tf, &c, 1);
653 /*** audio/mpeg version 2, 4 ***/
655 static GstStaticCaps aac_caps = GST_STATIC_CAPS ("audio/mpeg, "
656 "mpegversion = (int) { 2, 4 }, framed = (bool) false");
657 #define AAC_CAPS (gst_static_caps_get(&aac_caps))
658 #define AAC_AMOUNT (4096)
660 aac_type_find (GstTypeFind * tf, gpointer unused)
662 /* LUT to convert the AudioObjectType from the ADTS header to a string */
663 DataScanCtx c = { 0, NULL, 0 };
665 while (c.offset < AAC_AMOUNT) {
668 /* detect adts header or adif header.
669 * The ADIF header is 4 bytes, that should be OK. The ADTS header, on
670 * the other hand, is 14 bits only, so we require one valid frame with
671 * again a valid syncpoint on the next one (28 bits) for certainty. We
672 * require 4 kB, which is quite a lot, since frames are generally 200-400
674 * LOAS has 2 possible syncwords, which are 11 bits and 16 bits long.
675 * The following stream syntax depends on which one is found.
677 if (G_UNLIKELY (!data_scan_ctx_ensure_data (tf, &c, 6)))
680 snc = GST_READ_UINT16_BE (c.data);
681 if (G_UNLIKELY ((snc & 0xfff6) == 0xfff0)) {
682 /* ADTS header - find frame length */
683 GST_DEBUG ("Found one ADTS syncpoint at offset 0x%" G_GINT64_MODIFIER
684 "x, tracing next...", c.offset);
685 len = ((c.data[3] & 0x03) << 11) |
686 (c.data[4] << 3) | ((c.data[5] & 0xe0) >> 5);
688 if (len == 0 || !data_scan_ctx_ensure_data (tf, &c, len + 2)) {
689 GST_DEBUG ("Wrong sync or next frame not within reach, len=%u", len);
693 /* check if there's a second ADTS frame */
694 snc = GST_READ_UINT16_BE (c.data + len);
695 if ((snc & 0xfff6) == 0xfff0) {
697 guint mpegversion, sample_freq_idx, channel_config, profile_idx, rate;
698 guint8 audio_config[2];
700 mpegversion = (c.data[1] & 0x08) ? 2 : 4;
701 profile_idx = c.data[2] >> 6;
702 sample_freq_idx = ((c.data[2] & 0x3c) >> 2);
703 channel_config = ((c.data[2] & 0x01) << 2) + (c.data[3] >> 6);
705 GST_DEBUG ("Found second ADTS-%d syncpoint at offset 0x%"
706 G_GINT64_MODIFIER "x, framelen %u", mpegversion, c.offset, len);
708 /* 0xd and 0xe are reserved. 0xf means the sample frequency is directly
709 * specified in the header, but that's not allowed for ADTS */
710 if (sample_freq_idx > 0xc) {
711 GST_DEBUG ("Unexpected sample frequency index %d or wrong sync",
716 rate = gst_codec_utils_aac_get_sample_rate_from_index (sample_freq_idx);
717 GST_LOG ("ADTS: profile=%u, rate=%u", profile_idx, rate);
719 /* The ADTS frame header is slightly different from the
720 * AudioSpecificConfig defined for the MPEG-4 container, so we just
721 * construct enough of it for getting the level here. */
722 /* ADTS counts profiles from 0 instead of 1 to save bits */
723 audio_config[0] = (profile_idx + 1) << 3;
724 audio_config[0] |= (sample_freq_idx >> 1) & 0x7;
725 audio_config[1] = (sample_freq_idx & 0x1) << 7;
726 audio_config[1] |= (channel_config & 0xf) << 3;
728 caps = gst_caps_new_simple ("audio/mpeg",
729 "framed", G_TYPE_BOOLEAN, FALSE,
730 "mpegversion", G_TYPE_INT, mpegversion,
731 "stream-format", G_TYPE_STRING, "adts", NULL);
733 gst_codec_utils_aac_caps_set_level_and_profile (caps, audio_config, 2);
735 /* add rate and number of channels if we can */
736 if (channel_config != 0 && channel_config <= 7) {
737 const guint channels_map[] = { 0, 1, 2, 3, 4, 5, 6, 8 };
739 gst_caps_set_simple (caps, "channels", G_TYPE_INT,
740 channels_map[channel_config], "rate", G_TYPE_INT, rate, NULL);
743 gst_type_find_suggest (tf, GST_TYPE_FIND_LIKELY, caps);
744 gst_caps_unref (caps);
748 GST_DEBUG ("No next frame found... (should have been at 0x%x)", len);
749 } else if (G_UNLIKELY (((snc & 0xffe0) == 0x56e0) || (snc == 0x4de1))) {
752 GST_DEBUG ("Found one LOAS syncword at offset 0x%" G_GINT64_MODIFIER
753 "x, tracing next...", c.offset);
755 /* check length of frame for each type of detectable LOAS streams */
757 /* EPAudioSyncStream */
758 len = ((c.data[2] & 0x0f) << 9) | (c.data[3] << 1) |
759 ((c.data[4] & 0x80) >> 7);
760 /* add size of EP sync stream header */
763 /* AudioSyncStream */
764 len = ((c.data[1] & 0x1f) << 8) | c.data[2];
765 /* add size of sync stream header */
769 if (len == 0 || !data_scan_ctx_ensure_data (tf, &c, len + 2)) {
770 GST_DEBUG ("Wrong sync or next frame not within reach, len=%u", len);
774 /* check if there's a second LOAS frame */
775 snc = GST_READ_UINT16_BE (c.data + len);
776 if (((snc & 0xffe0) == 0x56e0) || (snc == 0x4de1)) {
777 GST_DEBUG ("Found second LOAS syncword at offset 0x%"
778 G_GINT64_MODIFIER "x, framelen %u", c.offset, len);
780 gst_type_find_suggest_simple (tf, GST_TYPE_FIND_LIKELY, "audio/mpeg",
781 "framed", G_TYPE_BOOLEAN, FALSE,
782 "mpegversion", G_TYPE_INT, 4,
783 "stream-format", G_TYPE_STRING, "loas", NULL);
787 GST_DEBUG ("No next frame found... (should have been at 0x%x)", len);
788 } else if (!memcmp (c.data, "ADIF", 4)) {
790 gst_type_find_suggest_simple (tf, GST_TYPE_FIND_LIKELY, "audio/mpeg",
791 "framed", G_TYPE_BOOLEAN, FALSE, "mpegversion", G_TYPE_INT, 4,
792 "stream-format", G_TYPE_STRING, "adif", NULL);
798 data_scan_ctx_advance (tf, &c, 1);
802 /*** audio/mpeg version 1 ***/
805 * The chance that random data is identified as a valid mp3 header is 63 / 2^18
806 * (0.024%) per try. This makes the function for calculating false positives
807 * 1 - (1 - ((63 / 2 ^18) ^ GST_MP3_TYPEFIND_MIN_HEADERS)) ^ buffersize)
808 * This has the following probabilities of false positives:
809 * datasize MIN_HEADERS
811 * 4096 62.6% 0.02% 0% 0%
812 * 16384 98% 0.09% 0% 0%
813 * 1 MiB 100% 5.88% 0% 0%
814 * 1 GiB 100% 100% 1.44% 0%
815 * 1 TiB 100% 100% 100% 0.35%
816 * This means that the current choice (3 headers by most of the time 4096 byte
817 * buffers is pretty safe for now.
819 * The max. size of each frame is 1440 bytes, which means that for N frames to
820 * be detected, we need 1440 * GST_MP3_TYPEFIND_MIN_HEADERS + 3 bytes of data.
821 * Assuming we step into the stream right after the frame header, this
822 * means we need 1440 * (GST_MP3_TYPEFIND_MIN_HEADERS + 1) - 1 + 3 bytes
823 * of data (5762) to always detect any mp3.
826 static const guint mp3types_bitrates[2][3][16] =
827 { {{0, 32, 64, 96, 128, 160, 192, 224, 256, 288, 320, 352, 384, 416, 448,},
828 {0, 32, 48, 56, 64, 80, 96, 112, 128, 160, 192, 224, 256, 320, 384,},
829 {0, 32, 40, 48, 56, 64, 80, 96, 112, 128, 160, 192, 224, 256, 320,}},
830 {{0, 32, 48, 56, 64, 80, 96, 112, 128, 144, 160, 176, 192, 224, 256,},
831 {0, 8, 16, 24, 32, 40, 48, 56, 64, 80, 96, 112, 128, 144, 160,},
832 {0, 8, 16, 24, 32, 40, 48, 56, 64, 80, 96, 112, 128, 144, 160,}},
835 static const guint mp3types_freqs[3][3] = { {11025, 12000, 8000},
836 {22050, 24000, 16000},
837 {44100, 48000, 32000}
841 mp3_type_frame_length_from_header (guint32 header, guint * put_layer,
842 guint * put_channels, guint * put_bitrate, guint * put_samplerate,
843 gboolean * may_be_free_format, gint possible_free_framelen)
845 guint bitrate, layer, length, mode, samplerate, version, channels;
847 if ((header & 0xffe00000) != 0xffe00000)
850 /* we don't need extension, copyright, original or
851 * emphasis for the frame length */
859 length = header & 0x1;
862 /* sampling frequency */
863 samplerate = header & 0x3;
869 bitrate = header & 0xF;
870 if (bitrate == 0 && possible_free_framelen == -1) {
871 GST_LOG ("Possibly a free format mp3 - signalling");
872 *may_be_free_format = TRUE;
874 if (bitrate == 15 || (bitrate == 0 && possible_free_framelen == -1))
877 /* ignore error correction, too */
881 layer = 4 - (header & 0x3);
886 /* version 0=MPEG2.5; 2=MPEG2; 3=MPEG1 */
887 version = header & 0x3;
892 channels = (mode == 3) ? 1 : 2;
893 samplerate = mp3types_freqs[version > 0 ? version - 1 : 0][samplerate];
897 length += possible_free_framelen;
898 bitrate = length * samplerate / 48000;
900 length += possible_free_framelen;
901 bitrate = length * samplerate /
902 ((layer == 3 && version != 3) ? 72000 : 144000);
906 bitrate = mp3types_bitrates[version == 3 ? 0 : 1][layer - 1][bitrate];
908 length = ((12000 * bitrate / samplerate) + length) * 4;
910 length += ((layer == 3
911 && version != 3) ? 72000 : 144000) * bitrate / samplerate;
915 GST_LOG ("mp3typefind: calculated mp3 frame length of %u bytes", length);
917 ("mp3typefind: samplerate = %u - bitrate = %u - layer = %u - version = %u"
918 " - channels = %u", samplerate, bitrate, layer, version, channels);
923 *put_channels = channels;
925 *put_bitrate = bitrate;
927 *put_samplerate = samplerate;
933 static GstStaticCaps mp3_caps = GST_STATIC_CAPS ("audio/mpeg, "
934 "mpegversion = (int) 1, layer = (int) [ 1, 3 ]");
935 #define MP3_CAPS (gst_static_caps_get(&mp3_caps))
937 * random values for typefinding
938 * if no more data is available, we will return a probability of
939 * (found_headers/TRY_HEADERS) * (MAXIMUM * (TRY_SYNC - bytes_skipped)
941 * if found_headers >= MIN_HEADERS
943 #define GST_MP3_TYPEFIND_MIN_HEADERS (2)
944 #define GST_MP3_TYPEFIND_TRY_HEADERS (5)
945 #define GST_MP3_TYPEFIND_TRY_SYNC (GST_TYPE_FIND_MAXIMUM * 100) /* 10kB */
946 #define GST_MP3_TYPEFIND_SYNC_SIZE (2048)
947 #define GST_MP3_WRONG_HEADER (10)
950 mp3_type_find_at_offset (GstTypeFind * tf, guint64 start_off,
951 guint * found_layer, GstTypeFindProbability * found_prob)
954 guint8 *data_end = NULL;
957 gint last_free_offset = -1;
958 gint last_free_framelen = -1;
959 gboolean headerstart = TRUE;
966 while (skipped < GST_MP3_TYPEFIND_TRY_SYNC) {
968 size = GST_MP3_TYPEFIND_SYNC_SIZE * 2;
971 data = gst_type_find_peek (tf, skipped + start_off, size);
972 } while (size > 10 && !data);
975 data_end = data + size;
978 guint8 *head_data = NULL;
979 guint layer = 0, bitrate, samplerate, channels;
980 guint found = 0; /* number of valid headers found */
981 guint64 offset = skipped;
983 while (found < GST_MP3_TYPEFIND_TRY_HEADERS) {
986 guint prev_layer = 0, prev_bitrate = 0;
987 guint prev_channels = 0, prev_samplerate = 0;
988 gboolean free = FALSE;
990 if ((gint64) (offset - skipped + 4) >= 0 &&
991 data + offset - skipped + 4 < data_end) {
992 head_data = data + offset - skipped;
994 head_data = gst_type_find_peek (tf, offset + start_off, 4);
998 head = GST_READ_UINT32_BE (head_data);
999 if (!(length = mp3_type_frame_length_from_header (head, &layer,
1000 &channels, &bitrate, &samplerate, &free,
1001 last_free_framelen))) {
1003 if (last_free_offset == -1)
1004 last_free_offset = offset;
1006 last_free_framelen = offset - last_free_offset;
1007 offset = last_free_offset;
1011 last_free_framelen = -1;
1014 /* Mark the fact that we didn't find a valid header at the beginning */
1016 headerstart = FALSE;
1018 GST_LOG ("%d. header at offset %" G_GUINT64_FORMAT
1019 " (0x%" G_GINT64_MODIFIER "x) was not an mp3 header "
1020 "(possibly-free: %s)", found + 1, start_off + offset,
1021 start_off + offset, free ? "yes" : "no");
1024 if ((prev_layer && prev_layer != layer) ||
1025 /* (prev_bitrate && prev_bitrate != bitrate) || <-- VBR */
1026 (prev_samplerate && prev_samplerate != samplerate) ||
1027 (prev_channels && prev_channels != channels)) {
1028 /* this means an invalid property, or a change, which might mean
1029 * that this is not a mp3 but just a random bytestream. It could
1030 * be a freaking funky encoded mp3 though. We'll just not count
1033 prev_bitrate = bitrate;
1034 prev_channels = channels;
1035 prev_samplerate = samplerate;
1038 GST_LOG ("found %d. header at offset %" G_GUINT64_FORMAT " (0x%"
1039 G_GINT64_MODIFIER "X)", found, start_off + offset,
1040 start_off + offset);
1044 g_assert (found <= GST_MP3_TYPEFIND_TRY_HEADERS);
1045 if (head_data == NULL &&
1046 gst_type_find_peek (tf, offset + start_off - 1, 1) == NULL)
1047 /* Incomplete last frame - don't count it. */
1049 if (found == GST_MP3_TYPEFIND_TRY_HEADERS ||
1050 (found >= GST_MP3_TYPEFIND_MIN_HEADERS && head_data == NULL)) {
1051 /* we can make a valid guess */
1052 guint probability = found * GST_TYPE_FIND_MAXIMUM *
1053 (GST_MP3_TYPEFIND_TRY_SYNC - skipped) /
1054 GST_MP3_TYPEFIND_TRY_HEADERS / GST_MP3_TYPEFIND_TRY_SYNC;
1057 && probability > (GST_TYPE_FIND_MINIMUM + GST_MP3_WRONG_HEADER))
1058 probability -= GST_MP3_WRONG_HEADER;
1059 if (probability < GST_TYPE_FIND_MINIMUM)
1060 probability = GST_TYPE_FIND_MINIMUM;
1065 ("audio/mpeg calculated %u = %u * %u / %u * (%u - %"
1066 G_GUINT64_FORMAT ") / %u", probability, GST_TYPE_FIND_MAXIMUM,
1067 found, GST_MP3_TYPEFIND_TRY_HEADERS, GST_MP3_TYPEFIND_TRY_SYNC,
1068 (guint64) skipped, GST_MP3_TYPEFIND_TRY_SYNC);
1069 /* make sure we're not id3 tagged */
1070 head_data = gst_type_find_peek (tf, -128, 3);
1071 if (head_data && (memcmp (head_data, "TAG", 3) == 0)) {
1074 g_assert (probability <= GST_TYPE_FIND_MAXIMUM);
1076 *found_prob = probability;
1077 if (probability > 0)
1078 *found_layer = layer;
1089 mp3_type_find (GstTypeFind * tf, gpointer unused)
1091 GstTypeFindProbability prob, mid_prob;
1093 guint layer, mid_layer;
1096 mp3_type_find_at_offset (tf, 0, &layer, &prob);
1097 length = gst_type_find_get_length (tf);
1099 if (length == 0 || length == (guint64) - 1) {
1105 /* if we're pretty certain already, skip the additional check */
1106 if (prob >= GST_TYPE_FIND_LIKELY)
1109 mp3_type_find_at_offset (tf, length / 2, &mid_layer, &mid_prob);
1113 GST_LOG ("detected audio/mpeg only in the middle (p=%u)", mid_prob);
1119 if (layer != mid_layer) {
1120 GST_WARNING ("audio/mpeg layer discrepancy: %u vs. %u", layer, mid_layer);
1121 return; /* FIXME: or should we just go with the one in the middle? */
1124 /* detected mpeg audio both in middle of the file and at the start */
1125 prob = (prob + mid_prob) / 2;
1129 /* let's see if there's a valid header right at the start */
1130 data = gst_type_find_peek (tf, 0, 4); /* use min. frame size? */
1131 if (data && mp3_type_frame_length_from_header (GST_READ_UINT32_BE (data),
1132 &layer, NULL, NULL, NULL, NULL, 0) != 0) {
1134 prob = GST_TYPE_FIND_POSSIBLE - 10;
1136 prob = MAX (GST_TYPE_FIND_POSSIBLE - 10, prob + 10);
1146 g_return_if_fail (layer >= 1 && layer <= 3);
1148 gst_type_find_suggest_simple (tf, prob, "audio/mpeg",
1149 "mpegversion", G_TYPE_INT, 1, "layer", G_TYPE_INT, layer, NULL);
1153 /*** audio/x-musepack ***/
1155 static GstStaticCaps musepack_caps =
1156 GST_STATIC_CAPS ("audio/x-musepack, streamversion= (int) { 7, 8 }");
1158 #define MUSEPACK_CAPS (gst_static_caps_get(&musepack_caps))
1160 musepack_type_find (GstTypeFind * tf, gpointer unused)
1162 guint8 *data = gst_type_find_peek (tf, 0, 4);
1163 GstTypeFindProbability prop = GST_TYPE_FIND_MINIMUM;
1164 gint streamversion = -1;
1166 if (data && memcmp (data, "MP+", 3) == 0) {
1168 if ((data[3] & 0x7f) == 7) {
1169 prop = GST_TYPE_FIND_MAXIMUM;
1171 prop = GST_TYPE_FIND_LIKELY + 10;
1173 } else if (data && memcmp (data, "MPCK", 4) == 0) {
1175 prop = GST_TYPE_FIND_MAXIMUM;
1178 if (streamversion != -1) {
1179 gst_type_find_suggest_simple (tf, prop, "audio/x-musepack",
1180 "streamversion", G_TYPE_INT, streamversion, NULL);
1184 /*** audio/x-ac3 ***/
1185 /* FIXME 0.11: should be audio/ac3, but isn't for backwards compatibility */
1186 static GstStaticCaps ac3_caps = GST_STATIC_CAPS ("audio/x-ac3");
1188 #define AC3_CAPS (gst_static_caps_get(&ac3_caps))
1190 static GstStaticCaps eac3_caps = GST_STATIC_CAPS ("audio/x-eac3");
1192 #define EAC3_CAPS (gst_static_caps_get(&eac3_caps))
1196 unsigned short bit_rate;
1197 unsigned short frm_size[3];
1200 static const struct ac3_frmsize ac3_frmsizecod_tbl[] = {
1203 {40, {80, 87, 120}},
1204 {40, {80, 88, 120}},
1205 {48, {96, 104, 144}},
1206 {48, {96, 105, 144}},
1207 {56, {112, 121, 168}},
1208 {56, {112, 122, 168}},
1209 {64, {128, 139, 192}},
1210 {64, {128, 140, 192}},
1211 {80, {160, 174, 240}},
1212 {80, {160, 175, 240}},
1213 {96, {192, 208, 288}},
1214 {96, {192, 209, 288}},
1215 {112, {224, 243, 336}},
1216 {112, {224, 244, 336}},
1217 {128, {256, 278, 384}},
1218 {128, {256, 279, 384}},
1219 {160, {320, 348, 480}},
1220 {160, {320, 349, 480}},
1221 {192, {384, 417, 576}},
1222 {192, {384, 418, 576}},
1223 {224, {448, 487, 672}},
1224 {224, {448, 488, 672}},
1225 {256, {512, 557, 768}},
1226 {256, {512, 558, 768}},
1227 {320, {640, 696, 960}},
1228 {320, {640, 697, 960}},
1229 {384, {768, 835, 1152}},
1230 {384, {768, 836, 1152}},
1231 {448, {896, 975, 1344}},
1232 {448, {896, 976, 1344}},
1233 {512, {1024, 1114, 1536}},
1234 {512, {1024, 1115, 1536}},
1235 {576, {1152, 1253, 1728}},
1236 {576, {1152, 1254, 1728}},
1237 {640, {1280, 1393, 1920}},
1238 {640, {1280, 1394, 1920}}
1242 ac3_type_find (GstTypeFind * tf, gpointer unused)
1244 DataScanCtx c = { 0, NULL, 0 };
1246 /* Search for an ac3 frame; not neccesarily right at the start, but give it
1247 * a lower probability if not found right at the start. Check that the
1248 * frame is followed by a second frame at the expected offset.
1249 * We could also check the two ac3 CRCs, but we don't do that right now */
1250 while (c.offset < 1024) {
1251 if (G_UNLIKELY (!data_scan_ctx_ensure_data (tf, &c, 5)))
1254 if (c.data[0] == 0x0b && c.data[1] == 0x77) {
1255 guint bsid = c.data[5] >> 3;
1259 guint fscod = c.data[4] >> 6;
1260 guint frmsizecod = c.data[4] & 0x3f;
1262 if (fscod < 3 && frmsizecod < 38) {
1263 DataScanCtx c_next = c;
1266 frame_size = ac3_frmsizecod_tbl[frmsizecod].frm_size[fscod];
1267 GST_LOG ("possible AC3 frame sync at offset %"
1268 G_GUINT64_FORMAT ", size=%u", c.offset, frame_size);
1269 if (data_scan_ctx_ensure_data (tf, &c_next, (frame_size * 2) + 5)) {
1270 data_scan_ctx_advance (tf, &c_next, frame_size * 2);
1272 if (c_next.data[0] == 0x0b && c_next.data[1] == 0x77) {
1273 fscod = c_next.data[4] >> 6;
1274 frmsizecod = c_next.data[4] & 0x3f;
1276 if (fscod < 3 && frmsizecod < 38) {
1277 GstTypeFindProbability prob;
1279 GST_LOG ("found second AC3 frame (size=%u), looks good",
1280 ac3_frmsizecod_tbl[frmsizecod].frm_size[fscod]);
1282 prob = GST_TYPE_FIND_MAXIMUM;
1284 prob = GST_TYPE_FIND_NEARLY_CERTAIN;
1286 gst_type_find_suggest (tf, prob, AC3_CAPS);
1290 GST_LOG ("no second AC3 frame found, false sync");
1294 } else if (bsid <= 16 && bsid > 10) {
1296 DataScanCtx c_next = c;
1299 frame_size = (((c.data[2] & 0x07) << 8) + c.data[3]) + 1;
1300 GST_LOG ("possible E-AC3 frame sync at offset %"
1301 G_GUINT64_FORMAT ", size=%u", c.offset, frame_size);
1302 if (data_scan_ctx_ensure_data (tf, &c_next, (frame_size * 2) + 5)) {
1303 data_scan_ctx_advance (tf, &c_next, frame_size * 2);
1305 if (c_next.data[0] == 0x0b && c_next.data[1] == 0x77) {
1306 GstTypeFindProbability prob;
1308 GST_LOG ("found second E-AC3 frame, looks good");
1310 prob = GST_TYPE_FIND_MAXIMUM;
1312 prob = GST_TYPE_FIND_NEARLY_CERTAIN;
1314 gst_type_find_suggest (tf, prob, EAC3_CAPS);
1317 GST_LOG ("no second E-AC3 frame found, false sync");
1321 GST_LOG ("invalid AC3 BSID: %u", bsid);
1324 data_scan_ctx_advance (tf, &c, 1);
1328 /*** audio/x-dts ***/
1329 static GstStaticCaps dts_caps = GST_STATIC_CAPS ("audio/x-dts");
1330 #define DTS_CAPS (gst_static_caps_get (&dts_caps))
1331 #define DTS_MIN_FRAMESIZE 96
1332 #define DTS_MAX_FRAMESIZE 18725 /* 16384*16/14 */
1335 dts_parse_frame_header (DataScanCtx * c, guint * frame_size,
1336 guint * sample_rate, guint * channels)
1338 static const int sample_rates[16] = { 0, 8000, 16000, 32000, 0, 0, 11025,
1339 22050, 44100, 0, 0, 12000, 24000, 48000, 96000, 192000
1341 static const guint8 channels_table[16] = { 1, 2, 2, 2, 2, 3, 3, 4, 4, 5,
1346 guint num_blocks, chans, lfe, i;
1348 marker = GST_READ_UINT32_BE (c->data);
1350 /* raw big endian or 14-bit big endian */
1351 if (marker == 0x7FFE8001 || marker == 0x1FFFE800) {
1352 for (i = 0; i < G_N_ELEMENTS (hdr); ++i)
1353 hdr[i] = GST_READ_UINT16_BE (c->data + (i * sizeof (guint16)));
1355 /* raw little endian or 14-bit little endian */
1356 if (marker == 0xFE7F0180 || marker == 0xFF1F00E8) {
1357 for (i = 0; i < G_N_ELEMENTS (hdr); ++i)
1358 hdr[i] = GST_READ_UINT16_LE (c->data + (i * sizeof (guint16)));
1363 GST_LOG ("dts sync marker 0x%08x at offset %u", marker, (guint) c->offset);
1366 if (marker == 0x1FFFE800 || marker == 0xFF1F00E8) {
1367 if ((hdr[2] & 0xFFF0) != 0x07F0)
1369 /* discard top 2 bits (2 void), shift in 2 */
1370 hdr[0] = (hdr[0] << 2) | ((hdr[1] >> 12) & 0x0003);
1371 /* discard top 4 bits (2 void, 2 shifted into hdr[0]), shift in 4 etc. */
1372 hdr[1] = (hdr[1] << 4) | ((hdr[2] >> 10) & 0x000F);
1373 hdr[2] = (hdr[2] << 6) | ((hdr[3] >> 8) & 0x003F);
1374 hdr[3] = (hdr[3] << 8) | ((hdr[4] >> 6) & 0x00FF);
1375 hdr[4] = (hdr[4] << 10) | ((hdr[5] >> 4) & 0x03FF);
1376 hdr[5] = (hdr[5] << 12) | ((hdr[6] >> 2) & 0x0FFF);
1377 hdr[6] = (hdr[6] << 14) | ((hdr[7] >> 0) & 0x3FFF);
1378 g_assert (hdr[0] == 0x7FFE && hdr[1] == 0x8001);
1381 GST_LOG ("frame header: %04x%04x%04x%04x", hdr[2], hdr[3], hdr[4], hdr[5]);
1383 num_blocks = (hdr[2] >> 2) & 0x7F;
1384 *frame_size = (((hdr[2] & 0x03) << 12) | (hdr[3] >> 4)) + 1;
1385 chans = ((hdr[3] & 0x0F) << 2) | (hdr[4] >> 14);
1386 *sample_rate = sample_rates[(hdr[4] >> 10) & 0x0F];
1387 lfe = (hdr[5] >> 9) & 0x03;
1389 if (num_blocks < 5 || *frame_size < 96 || *sample_rate == 0)
1392 if (marker == 0x1FFFE800 || marker == 0xFF1F00E8)
1393 *frame_size = (*frame_size * 16) / 14; /* FIXME: round up? */
1395 if (chans < G_N_ELEMENTS (channels_table))
1396 *channels = channels_table[chans] + ((lfe) ? 1 : 0);
1404 dts_type_find (GstTypeFind * tf, gpointer unused)
1406 DataScanCtx c = { 0, NULL, 0 };
1408 /* Search for an dts frame; not neccesarily right at the start, but give it
1409 * a lower probability if not found right at the start. Check that the
1410 * frame is followed by a second frame at the expected offset. */
1411 while (c.offset <= DTS_MAX_FRAMESIZE) {
1412 guint frame_size = 0, rate = 0, chans = 0;
1414 if (G_UNLIKELY (!data_scan_ctx_ensure_data (tf, &c, DTS_MIN_FRAMESIZE)))
1417 if (G_UNLIKELY (dts_parse_frame_header (&c, &frame_size, &rate, &chans))) {
1418 GstTypeFindProbability prob;
1421 prob = (c.offset == 0) ? GST_TYPE_FIND_LIKELY : GST_TYPE_FIND_POSSIBLE;
1423 /* check for second frame sync */
1425 data_scan_ctx_advance (tf, &next_c, frame_size);
1426 if (data_scan_ctx_ensure_data (tf, &next_c, 4)) {
1427 GST_LOG ("frame size: %u 0x%04x", frame_size, frame_size);
1428 GST_MEMDUMP ("second frame sync", next_c.data, 4);
1429 if (GST_READ_UINT32_BE (c.data) == GST_READ_UINT32_BE (next_c.data))
1430 prob = GST_TYPE_FIND_MAXIMUM;
1434 gst_type_find_suggest_simple (tf, prob, "audio/x-dts",
1435 "rate", G_TYPE_INT, rate, "channels", G_TYPE_INT, chans,
1436 "framed", G_TYPE_BOOLEAN, FALSE, NULL);
1438 gst_type_find_suggest_simple (tf, prob, "audio/x-dts",
1439 "rate", G_TYPE_INT, rate, "framed", G_TYPE_BOOLEAN, FALSE, NULL);
1445 data_scan_ctx_advance (tf, &c, 1);
1451 /* can only be detected by using the extension, in which case we use the default
1453 static GstStaticCaps gsm_caps =
1454 GST_STATIC_CAPS ("audio/x-gsm, rate=8000, channels=1");
1456 #define GSM_CAPS (gst_static_caps_get(&gsm_caps))
1460 static GstStaticCaps wavpack_caps =
1461 GST_STATIC_CAPS ("audio/x-wavpack, framed = (boolean) false");
1463 #define WAVPACK_CAPS (gst_static_caps_get(&wavpack_caps))
1465 static GstStaticCaps wavpack_correction_caps =
1466 GST_STATIC_CAPS ("audio/x-wavpack-correction, framed = (boolean) false");
1468 #define WAVPACK_CORRECTION_CAPS (gst_static_caps_get(&wavpack_correction_caps))
1471 wavpack_type_find (GstTypeFind * tf, gpointer unused)
1477 data = gst_type_find_peek (tf, 0, 32);
1481 if (data[0] != 'w' || data[1] != 'v' || data[2] != 'p' || data[3] != 'k')
1484 /* Note: wavpack blocks can be fairly large (easily 60-110k), possibly
1485 * larger than the max. limits imposed by certain typefinding elements
1486 * like id3demux or apedemux, so typefinding is most likely only going to
1487 * work in pull-mode */
1488 blocksize = GST_READ_UINT32_LE (data + 4);
1489 GST_LOG ("wavpack header, blocksize=0x%04x", blocksize);
1491 while (offset < 32 + blocksize) {
1494 /* get chunk header */
1495 GST_LOG ("peeking at chunk at offset 0x%04x", (guint) offset);
1496 data = gst_type_find_peek (tf, offset, 4);
1499 sublen = ((guint32) data[1]) << 1;
1500 if (data[0] & 0x80) {
1501 sublen |= (((guint32) data[2]) << 9) | (((guint32) data[3]) << 17);
1502 sublen += 1 + 3; /* id + length */
1504 sublen += 1 + 1; /* id + length */
1506 if (sublen > blocksize - offset + 32) {
1507 GST_LOG ("chunk length too big (%u > %" G_GUINT64_FORMAT ")", sublen,
1508 blocksize - offset);
1511 if ((data[0] & 0x20) == 0) {
1512 switch (data[0] & 0x0f) {
1513 case 0xa: /* ID_WV_BITSTREAM */
1514 case 0xc: /* ID_WVX_BITSTREAM */
1515 gst_type_find_suggest (tf, GST_TYPE_FIND_LIKELY, WAVPACK_CAPS);
1517 case 0xb: /* ID_WVC_BITSTREAM */
1518 gst_type_find_suggest (tf, GST_TYPE_FIND_LIKELY,
1519 WAVPACK_CORRECTION_CAPS);
1529 /*** application/postscrip ***/
1530 static GstStaticCaps postscript_caps =
1531 GST_STATIC_CAPS ("application/postscript");
1533 #define POSTSCRIPT_CAPS (gst_static_caps_get(&postscript_caps))
1536 postscript_type_find (GstTypeFind * tf, gpointer unused)
1538 guint8 *data = gst_type_find_peek (tf, 0, 3);
1542 if (data[0] == 0x04)
1544 if (data[0] == '%' && data[1] == '!')
1545 gst_type_find_suggest (tf, GST_TYPE_FIND_POSSIBLE, POSTSCRIPT_CAPS);
1549 /*** image/svg+xml ***/
1550 static GstStaticCaps svg_caps = GST_STATIC_CAPS ("image/svg+xml");
1552 #define SVG_CAPS (gst_static_caps_get(&svg_caps))
1555 svg_type_find (GstTypeFind * tf, gpointer unused)
1557 static const gchar svg_doctype[] = "!DOCTYPE svg";
1558 static const gchar svg_tag[] = "<svg";
1559 DataScanCtx c = { 0, NULL, 0 };
1561 while (c.offset <= 1024) {
1562 if (G_UNLIKELY (!data_scan_ctx_ensure_data (tf, &c, 12)))
1565 if (memcmp (svg_doctype, c.data, 12) == 0) {
1566 gst_type_find_suggest (tf, GST_TYPE_FIND_MAXIMUM, SVG_CAPS);
1568 } else if (memcmp (svg_tag, c.data, 4) == 0) {
1569 gst_type_find_suggest (tf, GST_TYPE_FIND_LIKELY, SVG_CAPS);
1572 data_scan_ctx_advance (tf, &c, 1);
1576 /*** multipart/x-mixed-replace mimestream ***/
1578 static GstStaticCaps multipart_caps =
1579 GST_STATIC_CAPS ("multipart/x-mixed-replace");
1580 #define MULTIPART_CAPS gst_static_caps_get(&multipart_caps)
1582 /* multipart/x-mixed replace is:
1583 * <maybe some whitespace>--<some ascii chars>[\r]\n
1584 * <more ascii chars>[\r]\nContent-type:<more ascii>[\r]\n */
1586 multipart_type_find (GstTypeFind * tf, gpointer unused)
1591 #define MULTIPART_MAX_BOUNDARY_OFFSET 16
1592 data = gst_type_find_peek (tf, 0, MULTIPART_MAX_BOUNDARY_OFFSET);
1597 x - data < MULTIPART_MAX_BOUNDARY_OFFSET - 2 && g_ascii_isspace (*x);
1599 if (x[0] != '-' || x[1] != '-')
1602 /* Could be okay, peek what should be enough for a complete header */
1603 #define MULTIPART_MAX_HEADER_SIZE 256
1604 data = gst_type_find_peek (tf, 0, MULTIPART_MAX_HEADER_SIZE);
1608 for (x = data; x - data < MULTIPART_MAX_HEADER_SIZE - 14; x++) {
1609 if (!isascii (*x)) {
1613 !g_ascii_strncasecmp ("content-type:", (gchar *) x + 1, 13)) {
1614 gst_type_find_suggest (tf, GST_TYPE_FIND_MAXIMUM, MULTIPART_CAPS);
1620 /*** video/mpeg systemstream ***/
1621 static GstStaticCaps mpeg_sys_caps = GST_STATIC_CAPS ("video/mpeg, "
1622 "systemstream = (boolean) true, mpegversion = (int) [ 1, 2 ]");
1624 #define MPEG_SYS_CAPS gst_static_caps_get(&mpeg_sys_caps)
1625 #define IS_MPEG_HEADER(data) (G_UNLIKELY((((guint8 *)(data))[0] == 0x00) && \
1626 (((guint8 *)(data))[1] == 0x00) && \
1627 (((guint8 *)(data))[2] == 0x01)))
1629 #define IS_MPEG_PACK_CODE(b) ((b) == 0xBA)
1630 #define IS_MPEG_SYS_CODE(b) ((b) == 0xBB)
1631 #define IS_MPEG_PACK_HEADER(data) (IS_MPEG_HEADER (data) && \
1632 IS_MPEG_PACK_CODE (((guint8 *)(data))[3]))
1634 #define IS_MPEG_PES_CODE(b) (((b) & 0xF0) == 0xE0 || ((b) & 0xF0) == 0xC0 || \
1636 #define IS_MPEG_PES_HEADER(data) (IS_MPEG_HEADER (data) && \
1637 IS_MPEG_PES_CODE (((guint8 *)(data))[3]))
1639 #define MPEG2_MAX_PROBE_LENGTH (128 * 1024) /* 128kB should be 64 packs of the
1640 * most common 2kB pack size. */
1642 #define MPEG2_MIN_SYS_HEADERS 2
1643 #define MPEG2_MAX_SYS_HEADERS 5
1646 mpeg_sys_is_valid_pack (GstTypeFind * tf, const guint8 * data, guint len,
1649 /* Check the pack header @ offset for validity, assuming that the 4 byte header
1650 * itself has already been checked. */
1656 /* Check marker bits */
1657 if ((data[4] & 0xC4) == 0x44) {
1662 if ((data[6] & 0x04) != 0x04 ||
1663 (data[8] & 0x04) != 0x04 ||
1664 (data[9] & 0x01) != 0x01 || (data[12] & 0x03) != 0x03)
1667 stuff_len = data[13] & 0x07;
1669 /* Check the following header bytes, if we can */
1670 if ((14 + stuff_len + 4) <= len) {
1671 if (!IS_MPEG_HEADER (data + 14 + stuff_len))
1675 *pack_size = 14 + stuff_len;
1677 } else if ((data[4] & 0xF1) == 0x21) {
1679 if ((data[6] & 0x01) != 0x01 ||
1680 (data[8] & 0x01) != 0x01 ||
1681 (data[9] & 0x80) != 0x80 || (data[11] & 0x01) != 0x01)
1684 /* Check the following header bytes, if we can */
1685 if ((12 + 4) <= len) {
1686 if (!IS_MPEG_HEADER (data + 12))
1698 mpeg_sys_is_valid_pes (GstTypeFind * tf, guint8 * data, guint len,
1701 guint pes_packet_len;
1703 /* Check the PES header at the given position, assuming the header code itself
1704 * was already checked */
1708 /* For MPEG Program streams, unbounded PES is not allowed, so we must have a
1709 * valid length present */
1710 pes_packet_len = GST_READ_UINT16_BE (data + 4);
1711 if (pes_packet_len == 0)
1714 /* Check the following header, if we can */
1715 if (6 + pes_packet_len + 4 <= len) {
1716 if (!IS_MPEG_HEADER (data + 6 + pes_packet_len))
1721 *pack_size = 6 + pes_packet_len;
1726 mpeg_sys_is_valid_sys (GstTypeFind * tf, guint8 * data, guint len,
1731 /* Check the System header at the given position, assuming the header code itself
1732 * was already checked */
1735 sys_hdr_len = GST_READ_UINT16_BE (data + 4);
1736 if (sys_hdr_len < 6)
1739 /* Check the following header, if we can */
1740 if (6 + sys_hdr_len + 4 <= len) {
1741 if (!IS_MPEG_HEADER (data + 6 + sys_hdr_len))
1746 *pack_size = 6 + sys_hdr_len;
1751 /* calculation of possibility to identify random data as mpeg systemstream:
1752 * bits that must match in header detection: 32 (or more)
1753 * chance that random data is identifed: 1/2^32
1754 * chance that MPEG2_MIN_PACK_HEADERS headers are identified:
1755 * 1/2^(32*MPEG2_MIN_PACK_HEADERS)
1756 * chance that this happens in MPEG2_MAX_PROBE_LENGTH bytes:
1757 * 1-(1+1/2^(32*MPEG2_MIN_PACK_HEADERS)^MPEG2_MAX_PROBE_LENGTH)
1758 * for current values:
1759 * 1-(1+1/2^(32*4)^101024)
1761 * Since we also check marker bits and pes packet lengths, this probability is a
1762 * very coarse upper bound.
1765 mpeg_sys_type_find (GstTypeFind * tf, gpointer unused)
1767 guint8 *data, *data0, *first_sync, *end;
1768 gint mpegversion = 0;
1769 guint pack_headers = 0;
1770 guint pes_headers = 0;
1772 guint since_last_sync = 0;
1773 guint32 sync_word = 0xffffffff;
1778 len = MPEG2_MAX_PROBE_LENGTH;
1781 data = gst_type_find_peek (tf, 0, 5 + len);
1782 } while (data == NULL && len >= 32);
1794 while (data < end) {
1796 if (sync_word == 0x00000100) {
1797 /* Found potential sync word */
1798 if (first_sync == NULL)
1799 first_sync = data - 3;
1801 if (since_last_sync > 4) {
1802 /* If more than 4 bytes since the last sync word, reset our counters,
1803 * as we're only interested in counting contiguous packets */
1804 pes_headers = pack_headers = 0;
1808 if (IS_MPEG_PACK_CODE (data[0])) {
1809 if ((data[1] & 0xC0) == 0x40) {
1812 } else if ((data[1] & 0xF0) == 0x20) {
1815 if (mpegversion != 0 &&
1816 mpeg_sys_is_valid_pack (tf, data - 3, end - data + 3, &pack_size)) {
1819 } else if (IS_MPEG_PES_CODE (data[0])) {
1821 if (mpeg_sys_is_valid_pes (tf, data - 3, end - data + 3, &pack_size)) {
1823 if (mpegversion == 0)
1826 } else if (IS_MPEG_SYS_CODE (data[0])) {
1827 if (mpeg_sys_is_valid_sys (tf, data - 3, end - data + 3, &pack_size)) {
1832 /* If we found a packet with a known size, skip the bytes in it and loop
1833 * around to check the next packet. */
1834 if (pack_size != 0) {
1835 data += pack_size - 3;
1836 sync_word = 0xffffffff;
1837 since_last_sync = 0;
1842 sync_word |= data[0];
1846 /* If we have found MAX headers, and *some* were pes headers (pack headers
1847 * are optional in an mpeg system stream) then return our high-probability
1849 if (pes_headers > 0 && (pack_headers + pes_headers) > MPEG2_MAX_SYS_HEADERS)
1853 /* If we at least saw MIN headers, and *some* were pes headers (pack headers
1854 * are optional in an mpeg system stream) then return a lower-probability
1856 if (pes_headers > 0 && (pack_headers + pes_headers) > MPEG2_MIN_SYS_HEADERS)
1864 prob = GST_TYPE_FIND_POSSIBLE + (10 * (pack_headers + pes_headers));
1865 prob = MIN (prob, GST_TYPE_FIND_MAXIMUM);
1867 /* lower probability if the first packet wasn't right at the start */
1868 if (data0 != first_sync && prob >= 10)
1871 GST_LOG ("Suggesting MPEG %d system stream, %d packs, %d pes, prob %u%%\n",
1872 mpegversion, pack_headers, pes_headers, prob);
1874 gst_type_find_suggest_simple (tf, prob, "video/mpeg",
1875 "systemstream", G_TYPE_BOOLEAN, TRUE,
1876 "mpegversion", G_TYPE_INT, mpegversion, NULL);
1880 /*** video/mpegts Transport Stream ***/
1881 static GstStaticCaps mpegts_caps = GST_STATIC_CAPS ("video/mpegts, "
1882 "systemstream = (boolean) true, packetsize = (int) [ 188, 208 ]");
1883 #define MPEGTS_CAPS gst_static_caps_get(&mpegts_caps)
1885 #define GST_MPEGTS_TYPEFIND_MIN_HEADERS 4
1886 #define GST_MPEGTS_TYPEFIND_MAX_HEADERS 10
1887 #define GST_MPEGTS_MAX_PACKET_SIZE 208
1888 #define GST_MPEGTS_TYPEFIND_SYNC_SIZE \
1889 (GST_MPEGTS_TYPEFIND_MIN_HEADERS * GST_MPEGTS_MAX_PACKET_SIZE)
1890 #define GST_MPEGTS_TYPEFIND_MAX_SYNC \
1891 (GST_MPEGTS_TYPEFIND_MAX_HEADERS * GST_MPEGTS_MAX_PACKET_SIZE)
1892 #define GST_MPEGTS_TYPEFIND_SCAN_LENGTH \
1893 (GST_MPEGTS_TYPEFIND_MAX_SYNC * 4)
1895 #define MPEGTS_HDR_SIZE 4
1896 /* Check for sync byte, error_indicator == 0 and packet has payload */
1897 #define IS_MPEGTS_HEADER(data) (((data)[0] == 0x47) && \
1898 (((data)[1] & 0x80) == 0x00) && \
1899 (((data)[3] & 0x30) != 0x00))
1901 /* Helper function to search ahead at intervals of packet_size for mpegts
1904 mpeg_ts_probe_headers (GstTypeFind * tf, guint64 offset, gint packet_size)
1906 /* We always enter this function having found at least one header already */
1908 guint8 *data = NULL;
1910 GST_LOG ("looking for mpeg-ts packets of size %u", packet_size);
1911 while (found < GST_MPEGTS_TYPEFIND_MAX_HEADERS) {
1912 offset += packet_size;
1914 data = gst_type_find_peek (tf, offset, MPEGTS_HDR_SIZE);
1915 if (data == NULL || !IS_MPEGTS_HEADER (data))
1919 GST_LOG ("mpeg-ts sync #%2d at offset %" G_GUINT64_FORMAT, found, offset);
1925 /* Try and detect at least 4 packets in at most 10 packets worth of
1926 * data. Need to try several possible packet sizes */
1928 mpeg_ts_type_find (GstTypeFind * tf, gpointer unused)
1930 /* TS packet sizes to test: normal, DVHS packet size and
1931 * FEC with 16 or 20 byte codes packet size. */
1932 const gint pack_sizes[] = { 188, 192, 204, 208 };
1934 guint8 *data = NULL;
1936 guint64 skipped = 0;
1938 while (skipped < GST_MPEGTS_TYPEFIND_SCAN_LENGTH) {
1939 if (size < MPEGTS_HDR_SIZE) {
1940 data = gst_type_find_peek (tf, skipped, GST_MPEGTS_TYPEFIND_SYNC_SIZE);
1943 size = GST_MPEGTS_TYPEFIND_SYNC_SIZE;
1946 /* Have at least MPEGTS_HDR_SIZE bytes at this point */
1947 if (IS_MPEGTS_HEADER (data)) {
1950 GST_LOG ("possible mpeg-ts sync at offset %" G_GUINT64_FORMAT, skipped);
1952 for (p = 0; p < G_N_ELEMENTS (pack_sizes); p++) {
1955 /* Probe ahead at size pack_sizes[p] */
1956 found = mpeg_ts_probe_headers (tf, skipped, pack_sizes[p]);
1957 if (found >= GST_MPEGTS_TYPEFIND_MIN_HEADERS) {
1960 /* found at least 4 headers. 10 headers = MAXIMUM probability.
1961 * Arbitrarily, I assigned 10% probability for each header we
1962 * found, 40% -> 100% */
1963 probability = MIN (10 * found, GST_TYPE_FIND_MAXIMUM);
1965 gst_type_find_suggest_simple (tf, probability, "video/mpegts",
1966 "systemstream", G_TYPE_BOOLEAN, TRUE,
1967 "packetsize", G_TYPE_INT, pack_sizes[p], NULL);
1978 #define GST_MPEGVID_TYPEFIND_TRY_PICTURES 6
1979 #define GST_MPEGVID_TYPEFIND_TRY_SYNC (100 * 1024) /* 100 kB */
1981 /* Scan ahead a maximum of max_extra_offset bytes until the next IS_MPEG_HEADER
1982 * offset. After the call, offset will be after the 0x000001, i.e. at the 4th
1983 * byte of the MPEG header. Returns TRUE if a header was found, FALSE if not.
1986 mpeg_find_next_header (GstTypeFind * tf, DataScanCtx * c,
1987 guint64 max_extra_offset)
1989 guint64 extra_offset;
1991 for (extra_offset = 0; extra_offset <= max_extra_offset; ++extra_offset) {
1992 if (!data_scan_ctx_ensure_data (tf, c, 4))
1994 if (IS_MPEG_HEADER (c->data)) {
1995 data_scan_ctx_advance (tf, c, 3);
1998 data_scan_ctx_advance (tf, c, 1);
2003 /*** video/mpeg MPEG-4 elementary video stream ***/
2005 static GstStaticCaps mpeg4_video_caps = GST_STATIC_CAPS ("video/mpeg, "
2006 "systemstream=(boolean)false, mpegversion=4, parsed=(boolean)false");
2007 #define MPEG4_VIDEO_CAPS gst_static_caps_get(&mpeg4_video_caps)
2010 * This typefind is based on the elementary video header defined in
2011 * http://xhelmboyx.tripod.com/formats/mpeg-layout.txt
2012 * In addition, it allows the visual object sequence header to be
2013 * absent, and even the VOS header to be absent. In the latter case,
2014 * a number of VOPs have to be present.
2017 mpeg4_video_type_find (GstTypeFind * tf, gpointer unused)
2019 DataScanCtx c = { 0, NULL, 0 };
2020 gboolean seen_vios_at_0 = FALSE;
2021 gboolean seen_vios = FALSE;
2022 gboolean seen_vos = FALSE;
2023 gboolean seen_vol = FALSE;
2024 guint num_vop_headers = 0;
2027 while (c.offset < GST_MPEGVID_TYPEFIND_TRY_SYNC) {
2028 if (num_vop_headers >= GST_MPEGVID_TYPEFIND_TRY_PICTURES)
2031 if (!mpeg_find_next_header (tf, &c,
2032 GST_MPEGVID_TYPEFIND_TRY_SYNC - c.offset))
2037 /* visual_object_sequence_start_code */
2040 break; /* Terminate at second vios */
2042 seen_vios_at_0 = TRUE;
2044 data_scan_ctx_advance (tf, &c, 2);
2045 if (!mpeg_find_next_header (tf, &c, 0))
2050 /* Optional metadata */
2052 if (!mpeg_find_next_header (tf, &c, 24))
2056 /* visual_object_start_code (consider it optional) */
2058 data_scan_ctx_advance (tf, &c, 2);
2059 /* may contain ID marker and YUV clamping */
2060 if (!mpeg_find_next_header (tf, &c, 7))
2066 /* video_object_start_code */
2069 break; /* Terminate at second vos */
2071 data_scan_ctx_advance (tf, &c, 2);
2075 /* video_object_layer_start_code */
2076 if (sc >= 0x20 && sc <= 0x2F) {
2078 data_scan_ctx_advance (tf, &c, 5);
2082 /* video_object_plane_start_code */
2085 data_scan_ctx_advance (tf, &c, 2);
2089 /* Unknown start code. */
2092 if (num_vop_headers > 0 || seen_vol) {
2093 GstTypeFindProbability probability = 0;
2095 GST_LOG ("Found %d pictures, vios: %d, vos:%d, vol:%d", num_vop_headers,
2096 seen_vios, seen_vos, seen_vol);
2098 if (num_vop_headers >= GST_MPEGVID_TYPEFIND_TRY_PICTURES && seen_vios_at_0
2099 && seen_vos && seen_vol)
2100 probability = GST_TYPE_FIND_MAXIMUM - 1;
2101 else if (num_vop_headers >= GST_MPEGVID_TYPEFIND_TRY_PICTURES && seen_vios
2102 && seen_vos && seen_vol)
2103 probability = GST_TYPE_FIND_NEARLY_CERTAIN - 1;
2104 else if (seen_vios_at_0 && seen_vos && seen_vol)
2105 probability = GST_TYPE_FIND_NEARLY_CERTAIN - 6;
2106 else if (num_vop_headers >= GST_MPEGVID_TYPEFIND_TRY_PICTURES && seen_vos
2108 probability = GST_TYPE_FIND_NEARLY_CERTAIN - 6;
2109 else if (num_vop_headers >= GST_MPEGVID_TYPEFIND_TRY_PICTURES && seen_vol)
2110 probability = GST_TYPE_FIND_NEARLY_CERTAIN - 9;
2111 else if (num_vop_headers >= GST_MPEGVID_TYPEFIND_TRY_PICTURES)
2112 probability = GST_TYPE_FIND_LIKELY - 1;
2113 else if (num_vop_headers > 2 && seen_vios && seen_vos && seen_vol)
2114 probability = GST_TYPE_FIND_LIKELY - 9;
2115 else if (seen_vios && seen_vos && seen_vol)
2116 probability = GST_TYPE_FIND_LIKELY - 20;
2117 else if (num_vop_headers > 0 && seen_vos && seen_vol)
2118 probability = GST_TYPE_FIND_POSSIBLE;
2119 else if (num_vop_headers > 0)
2120 probability = GST_TYPE_FIND_POSSIBLE - 10;
2121 else if (seen_vos && seen_vol)
2122 probability = GST_TYPE_FIND_POSSIBLE - 20;
2124 gst_type_find_suggest (tf, probability, MPEG4_VIDEO_CAPS);
2128 /*** video/x-h263 H263 video stream ***/
2129 static GstStaticCaps h263_video_caps = GST_STATIC_CAPS ("video/x-h263");
2131 #define H263_VIDEO_CAPS gst_static_caps_get(&h263_video_caps)
2133 #define H263_MAX_PROBE_LENGTH (128 * 1024)
2136 h263_video_type_find (GstTypeFind * tf, gpointer unused)
2138 DataScanCtx c = { 0, NULL, 0 };
2146 while (c.offset < H263_MAX_PROBE_LENGTH) {
2147 if (G_UNLIKELY (!data_scan_ctx_ensure_data (tf, &c, 4)))
2150 /* Find the picture start code */
2151 data = (data << 8) + c.data[0];
2152 psc = data & G_GUINT64_CONSTANT (0xfffffc0000);
2153 if (psc == 0x800000) {
2156 tr = (data & 0x3fc) >> 2;
2160 /* Now that we have a Valid PSC, check if we also have a valid PTYPE and
2161 the Source Format, which should range between 1 and 5 */
2162 if (((tr >> 6) == 0x2) && (format > 0 && format < 6))
2167 /* FIXME: maybe bail out early if we get mostly bad syncs ? */
2170 data_scan_ctx_advance (tf, &c, 1);
2173 if (good > 0 && bad == 0)
2174 gst_type_find_suggest (tf, GST_TYPE_FIND_LIKELY, H263_VIDEO_CAPS);
2175 else if (good > 2 * bad)
2176 gst_type_find_suggest (tf, GST_TYPE_FIND_POSSIBLE, H263_VIDEO_CAPS);
2181 /*** video/x-h264 H264 elementary video stream ***/
2183 static GstStaticCaps h264_video_caps =
2184 GST_STATIC_CAPS ("video/x-h264,stream-format=byte-stream");
2186 #define H264_VIDEO_CAPS gst_static_caps_get(&h264_video_caps)
2188 #define H264_MAX_PROBE_LENGTH (128 * 1024) /* 128kB for HD should be enough. */
2191 h264_video_type_find (GstTypeFind * tf, gpointer unused)
2193 DataScanCtx c = { 0, NULL, 0 };
2195 /* Stream consists of: a series of sync codes (00 00 00 01) followed
2202 while (c.offset < H264_MAX_PROBE_LENGTH) {
2203 if (G_UNLIKELY (!data_scan_ctx_ensure_data (tf, &c, 4)))
2206 if (IS_MPEG_HEADER (c.data)) {
2207 nut = c.data[3] & 0x9f; /* forbiden_zero_bit | nal_unit_type */
2208 ref = c.data[3] & 0x60; /* nal_ref_idc */
2210 /* if forbiden bit is different to 0 won't be h264 */
2216 /* collect statistics about the NAL types */
2217 if ((nut >= 1 && nut <= 13) || nut == 19) {
2218 if ((nut == 5 && ref == 0) ||
2219 ((nut == 6 || (nut >= 9 && nut <= 12)) && ref != 0)) {
2224 } else if (nut >= 14 && nut <= 33) {
2226 /* Theoretically these are good, since if they exist in the
2227 stream it merely means that a newer backwards-compatible
2228 h.264 stream. But we should be identifying that separately. */
2231 /* unspecified, application specific */
2232 /* don't consider these bad */
2235 GST_DEBUG ("good %d bad %d", good, bad);
2237 if (good >= 10 && bad < 4) {
2238 gst_type_find_suggest (tf, GST_TYPE_FIND_LIKELY, H264_VIDEO_CAPS);
2242 data_scan_ctx_advance (tf, &c, 4);
2244 data_scan_ctx_advance (tf, &c, 1);
2247 if (good >= 2 && bad < 1) {
2248 gst_type_find_suggest (tf, GST_TYPE_FIND_POSSIBLE, H264_VIDEO_CAPS);
2253 /*** video/mpeg video stream ***/
2255 static GstStaticCaps mpeg_video_caps = GST_STATIC_CAPS ("video/mpeg, "
2256 "systemstream = (boolean) false");
2257 #define MPEG_VIDEO_CAPS gst_static_caps_get(&mpeg_video_caps)
2260 * Idea is the same as MPEG system stream typefinding: We check each
2261 * byte of the stream to see if - from that point on - the stream
2262 * matches a predefined set of marker bits as defined in the MPEG
2265 * I'm sure someone will do a chance calculation here too.
2269 mpeg_video_stream_type_find (GstTypeFind * tf, gpointer unused)
2271 DataScanCtx c = { 0, NULL, 0 };
2272 gboolean seen_seq_at_0 = FALSE;
2273 gboolean seen_seq = FALSE;
2274 gboolean seen_gop = FALSE;
2275 guint64 last_pic_offset = 0;
2276 guint num_pic_headers = 0;
2279 while (c.offset < GST_MPEGVID_TYPEFIND_TRY_SYNC) {
2280 if (found >= GST_MPEGVID_TYPEFIND_TRY_PICTURES)
2283 if (!data_scan_ctx_ensure_data (tf, &c, 5))
2286 if (!IS_MPEG_HEADER (c.data))
2289 /* a pack header indicates that this isn't an elementary stream */
2290 if (c.data[3] == 0xBA && mpeg_sys_is_valid_pack (tf, c.data, c.size, NULL))
2293 /* do we have a sequence header? */
2294 if (c.data[3] == 0xB3) {
2295 seen_seq_at_0 = seen_seq_at_0 || (c.offset == 0);
2297 data_scan_ctx_advance (tf, &c, 4 + 8);
2301 /* or a GOP header */
2302 if (c.data[3] == 0xB8) {
2304 data_scan_ctx_advance (tf, &c, 8);
2308 /* but what we'd really like to see is a picture header */
2309 if (c.data[3] == 0x00) {
2311 last_pic_offset = c.offset;
2312 data_scan_ctx_advance (tf, &c, 8);
2316 /* ... each followed by a slice header with slice_vertical_pos=1 that's
2317 * not too far away from the previously seen picture header. */
2318 if (c.data[3] == 0x01 && num_pic_headers > found &&
2319 (c.offset - last_pic_offset) >= 4 &&
2320 (c.offset - last_pic_offset) <= 64) {
2321 data_scan_ctx_advance (tf, &c, 4);
2328 data_scan_ctx_advance (tf, &c, 1);
2331 if (found > 0 || seen_seq) {
2332 GstTypeFindProbability probability = 0;
2334 GST_LOG ("Found %d pictures, seq:%d, gop:%d", found, seen_seq, seen_gop);
2336 if (found >= GST_MPEGVID_TYPEFIND_TRY_PICTURES && seen_seq && seen_gop)
2337 probability = GST_TYPE_FIND_NEARLY_CERTAIN - 1;
2338 else if (found >= GST_MPEGVID_TYPEFIND_TRY_PICTURES && seen_seq)
2339 probability = GST_TYPE_FIND_NEARLY_CERTAIN - 9;
2340 else if (found >= GST_MPEGVID_TYPEFIND_TRY_PICTURES)
2341 probability = GST_TYPE_FIND_LIKELY;
2342 else if (seen_seq_at_0 && seen_gop && found > 2)
2343 probability = GST_TYPE_FIND_LIKELY - 10;
2344 else if (seen_seq && seen_gop && found > 2)
2345 probability = GST_TYPE_FIND_LIKELY - 20;
2346 else if (seen_seq_at_0 && found > 0)
2347 probability = GST_TYPE_FIND_POSSIBLE;
2348 else if (seen_seq && found > 0)
2349 probability = GST_TYPE_FIND_POSSIBLE - 5;
2351 probability = GST_TYPE_FIND_POSSIBLE - 10;
2353 probability = GST_TYPE_FIND_POSSIBLE - 20;
2355 gst_type_find_suggest_simple (tf, probability, "video/mpeg",
2356 "systemstream", G_TYPE_BOOLEAN, FALSE,
2357 "mpegversion", G_TYPE_INT, 1, NULL);
2361 /*** audio/x-aiff ***/
2363 static GstStaticCaps aiff_caps = GST_STATIC_CAPS ("audio/x-aiff");
2365 #define AIFF_CAPS gst_static_caps_get(&aiff_caps)
2367 aiff_type_find (GstTypeFind * tf, gpointer unused)
2369 guint8 *data = gst_type_find_peek (tf, 0, 4);
2371 if (data && memcmp (data, "FORM", 4) == 0) {
2373 if (memcmp (data, "AIFF", 4) == 0 || memcmp (data, "AIFC", 4) == 0)
2374 gst_type_find_suggest (tf, GST_TYPE_FIND_MAXIMUM, AIFF_CAPS);
2378 /*** audio/x-svx ***/
2380 static GstStaticCaps svx_caps = GST_STATIC_CAPS ("audio/x-svx");
2382 #define SVX_CAPS gst_static_caps_get(&svx_caps)
2384 svx_type_find (GstTypeFind * tf, gpointer unused)
2386 guint8 *data = gst_type_find_peek (tf, 0, 4);
2388 if (data && memcmp (data, "FORM", 4) == 0) {
2390 if (memcmp (data, "8SVX", 4) == 0 || memcmp (data, "16SV", 4) == 0)
2391 gst_type_find_suggest (tf, GST_TYPE_FIND_MAXIMUM, SVX_CAPS);
2395 /*** audio/x-shorten ***/
2397 static GstStaticCaps shn_caps = GST_STATIC_CAPS ("audio/x-shorten");
2399 #define SHN_CAPS gst_static_caps_get(&shn_caps)
2401 shn_type_find (GstTypeFind * tf, gpointer unused)
2403 guint8 *data = gst_type_find_peek (tf, 0, 4);
2405 if (data && memcmp (data, "ajkg", 4) == 0) {
2406 gst_type_find_suggest (tf, GST_TYPE_FIND_MAXIMUM, SHN_CAPS);
2408 data = gst_type_find_peek (tf, -8, 8);
2409 if (data && memcmp (data, "SHNAMPSK", 8) == 0) {
2410 gst_type_find_suggest (tf, GST_TYPE_FIND_MAXIMUM, SHN_CAPS);
2414 /*** application/x-ape ***/
2416 static GstStaticCaps ape_caps = GST_STATIC_CAPS ("application/x-ape");
2418 #define APE_CAPS gst_static_caps_get(&ape_caps)
2420 ape_type_find (GstTypeFind * tf, gpointer unused)
2422 guint8 *data = gst_type_find_peek (tf, 0, 4);
2424 if (data && memcmp (data, "MAC ", 4) == 0) {
2425 gst_type_find_suggest (tf, GST_TYPE_FIND_LIKELY + 10, APE_CAPS);
2429 /*** ISO FORMATS ***/
2431 /*** audio/x-m4a ***/
2433 static GstStaticCaps m4a_caps = GST_STATIC_CAPS ("audio/x-m4a");
2435 #define M4A_CAPS (gst_static_caps_get(&m4a_caps))
2437 m4a_type_find (GstTypeFind * tf, gpointer unused)
2439 guint8 *data = gst_type_find_peek (tf, 4, 8);
2441 if (data && (memcmp (data, "ftypM4A ", 8) == 0)) {
2442 gst_type_find_suggest (tf, GST_TYPE_FIND_MAXIMUM, M4A_CAPS);
2446 /*** application/x-3gp ***/
2448 /* The Q is there because variables can't start with a number. */
2449 static GstStaticCaps q3gp_caps = GST_STATIC_CAPS ("application/x-3gp");
2450 #define Q3GP_CAPS (gst_static_caps_get(&q3gp_caps))
2452 static const gchar *
2453 q3gp_type_find_get_profile (const guint8 * data)
2455 switch (GST_MAKE_FOURCC (data[0], data[1], data[2], 0)) {
2456 case GST_MAKE_FOURCC ('3', 'g', 'g', 0):
2458 case GST_MAKE_FOURCC ('3', 'g', 'p', 0):
2460 case GST_MAKE_FOURCC ('3', 'g', 's', 0):
2461 return "streaming-server";
2462 case GST_MAKE_FOURCC ('3', 'g', 'r', 0):
2463 return "progressive-download";
2471 q3gp_type_find (GstTypeFind * tf, gpointer unused)
2473 const gchar *profile;
2474 guint32 ftyp_size = 0;
2476 guint8 *data = NULL;
2478 if ((data = gst_type_find_peek (tf, 0, 12)) == NULL) {
2483 if (memcmp (data, "ftyp", 4) != 0) {
2487 /* check major brand */
2489 if ((profile = q3gp_type_find_get_profile (data))) {
2490 gst_type_find_suggest_simple (tf, GST_TYPE_FIND_MAXIMUM,
2491 "application/x-3gp", "profile", G_TYPE_STRING, profile, NULL);
2495 /* check compatible brands */
2496 if ((data = gst_type_find_peek (tf, 0, 4)) != NULL) {
2497 ftyp_size = GST_READ_UINT32_BE (data);
2499 for (offset = 16; offset < ftyp_size; offset += 4) {
2500 if ((data = gst_type_find_peek (tf, offset, 3)) == NULL) {
2503 if ((profile = q3gp_type_find_get_profile (data))) {
2504 gst_type_find_suggest_simple (tf, GST_TYPE_FIND_MAXIMUM,
2505 "application/x-3gp", "profile", G_TYPE_STRING, profile, NULL);
2514 /*** video/mj2 and image/jp2 ***/
2515 static GstStaticCaps mj2_caps = GST_STATIC_CAPS ("video/mj2");
2517 #define MJ2_CAPS gst_static_caps_get(&mj2_caps)
2519 static GstStaticCaps jp2_caps = GST_STATIC_CAPS ("image/jp2");
2521 #define JP2_CAPS gst_static_caps_get(&jp2_caps)
2524 jp2_type_find (GstTypeFind * tf, gpointer unused)
2528 data = gst_type_find_peek (tf, 0, 24);
2533 if (memcmp (data, "\000\000\000\014jP \015\012\207\012", 12) != 0)
2536 /* check ftyp box */
2538 if (memcmp (data + 4, "ftyp", 4) == 0) {
2539 if (memcmp (data + 8, "jp2 ", 4) == 0)
2540 gst_type_find_suggest (tf, GST_TYPE_FIND_MAXIMUM, JP2_CAPS);
2541 else if (memcmp (data + 8, "mjp2", 4) == 0)
2542 gst_type_find_suggest (tf, GST_TYPE_FIND_MAXIMUM, MJ2_CAPS);
2546 /*** video/quicktime ***/
2548 static GstStaticCaps qt_caps = GST_STATIC_CAPS ("video/quicktime");
2550 #define QT_CAPS gst_static_caps_get(&qt_caps)
2551 #define STRNCMP(x,y,z) (strncmp ((char*)(x), (char*)(y), z))
2553 /* FIXME 0.11: go through http://www.ftyps.com/ */
2555 qt_type_find (GstTypeFind * tf, gpointer unused)
2561 const gchar *variant = NULL;
2563 while ((data = gst_type_find_peek (tf, offset, 12)) != NULL) {
2566 if (STRNCMP (&data[4], "ftypqt ", 8) == 0) {
2567 tip = GST_TYPE_FIND_MAXIMUM;
2571 if (STRNCMP (&data[4], "ftypisom", 8) == 0 ||
2572 STRNCMP (&data[4], "ftypavc1", 8) == 0 ||
2573 STRNCMP (&data[4], "ftypmp42", 8) == 0) {
2574 tip = GST_TYPE_FIND_MAXIMUM;
2579 /* box/atom types that are in common with ISO base media file format */
2580 if (STRNCMP (&data[4], "moov", 4) == 0 ||
2581 STRNCMP (&data[4], "mdat", 4) == 0 ||
2582 STRNCMP (&data[4], "ftyp", 4) == 0 ||
2583 STRNCMP (&data[4], "free", 4) == 0 ||
2584 STRNCMP (&data[4], "uuid", 4) == 0 ||
2585 STRNCMP (&data[4], "skip", 4) == 0) {
2587 tip = GST_TYPE_FIND_LIKELY;
2589 tip = GST_TYPE_FIND_NEARLY_CERTAIN;
2592 /* other box/atom types, apparently quicktime specific */
2593 else if (STRNCMP (&data[4], "pnot", 4) == 0 ||
2594 STRNCMP (&data[4], "PICT", 4) == 0 ||
2595 STRNCMP (&data[4], "wide", 4) == 0 ||
2596 STRNCMP (&data[4], "prfl", 4) == 0) {
2597 tip = GST_TYPE_FIND_MAXIMUM;
2604 size = GST_READ_UINT32_BE (data);
2605 /* check compatible brands rather than ever expaning major brands above */
2606 if ((STRNCMP (&data[4], "ftyp", 4) == 0) && (size >= 16)) {
2607 new_offset = offset + 12;
2608 while (new_offset + 4 <= offset + size) {
2609 data = gst_type_find_peek (tf, new_offset, 4);
2612 if (STRNCMP (&data[4], "isom", 4) == 0 ||
2613 STRNCMP (&data[4], "avc1", 4) == 0 ||
2614 STRNCMP (&data[4], "mp41", 4) == 0 ||
2615 STRNCMP (&data[4], "mp42", 4) == 0) {
2616 tip = GST_TYPE_FIND_MAXIMUM;
2626 sizedata = gst_type_find_peek (tf, offset + 8, 8);
2627 if (sizedata == NULL)
2630 size = GST_READ_UINT64_BE (sizedata);
2635 new_offset = offset + size;
2636 if (new_offset <= offset)
2638 offset = new_offset;
2644 GstCaps *caps = gst_caps_copy (QT_CAPS);
2646 gst_caps_set_simple (caps, "variant", G_TYPE_STRING, variant, NULL);
2647 gst_type_find_suggest (tf, tip, caps);
2648 gst_caps_unref (caps);
2650 gst_type_find_suggest (tf, tip, QT_CAPS);
2656 /*** image/x-quicktime ***/
2658 static GstStaticCaps qtif_caps = GST_STATIC_CAPS ("image/x-quicktime");
2660 #define QTIF_CAPS gst_static_caps_get(&qtif_caps)
2662 /* how many atoms we check before we give up */
2663 #define QTIF_MAXROUNDS 25
2666 qtif_type_find (GstTypeFind * tf, gpointer unused)
2669 gboolean found_idsc = FALSE;
2670 gboolean found_idat = FALSE;
2674 while ((data = gst_type_find_peek (tf, offset, 8)) != NULL) {
2677 size = GST_READ_UINT32_BE (data);
2679 const guint8 *sizedata;
2681 sizedata = gst_type_find_peek (tf, offset + 8, 8);
2682 if (sizedata == NULL)
2685 size = GST_READ_UINT64_BE (sizedata);
2690 if (STRNCMP (data + 4, "idsc", 4) == 0)
2692 if (STRNCMP (data + 4, "idat", 4) == 0)
2695 if (found_idsc && found_idat) {
2696 gst_type_find_suggest (tf, GST_TYPE_FIND_MAXIMUM, QTIF_CAPS);
2701 if (++rounds > QTIF_MAXROUNDS)
2705 if (found_idsc || found_idat) {
2706 gst_type_find_suggest (tf, GST_TYPE_FIND_LIKELY, QTIF_CAPS);
2711 /*** audio/x-mod ***/
2713 static GstStaticCaps mod_caps = GST_STATIC_CAPS ("audio/x-mod");
2715 #define MOD_CAPS gst_static_caps_get(&mod_caps)
2716 /* FIXME: M15 CheckType to do */
2718 mod_type_find (GstTypeFind * tf, gpointer unused)
2723 if ((data = gst_type_find_peek (tf, 1080, 4)) != NULL) {
2724 /* Protracker and variants */
2725 if ((memcmp (data, "M.K.", 4) == 0) || (memcmp (data, "M!K!", 4) == 0) ||
2727 (memcmp (data, "FLT", 3) == 0 && isdigit (data[3])) ||
2728 (memcmp (data, "EXO", 3) == 0 && isdigit (data[3])) ||
2729 /* Oktalyzer (Amiga) */
2730 (memcmp (data, "OKTA", 4) == 0) ||
2731 /* Oktalyser (Atari) */
2732 (memcmp (data, "CD81", 4) == 0) ||
2734 (memcmp (data + 1, "CHN", 3) == 0 && isdigit (data[0])) ||
2735 /* Fasttracker or Taketracker */
2736 (memcmp (data + 2, "CH", 2) == 0 && isdigit (data[0])
2737 && isdigit (data[1])) || (memcmp (data + 2, "CN", 2) == 0
2738 && isdigit (data[0]) && isdigit (data[1]))) {
2739 gst_type_find_suggest (tf, GST_TYPE_FIND_MAXIMUM, MOD_CAPS);
2744 if ((data = gst_type_find_peek (tf, 0, 38)) != NULL) {
2745 if (memcmp (data, "Extended Module: ", 17) == 0 && data[37] == 0x1A) {
2746 gst_type_find_suggest (tf, GST_TYPE_FIND_MAXIMUM, MOD_CAPS);
2751 if (data || (data = gst_type_find_peek (tf, 0, 8)) != NULL) {
2752 if (memcmp (data, "OKTASONG", 8) == 0) {
2753 gst_type_find_suggest (tf, GST_TYPE_FIND_MAXIMUM, MOD_CAPS);
2757 if (data || (data = gst_type_find_peek (tf, 0, 4)) != NULL) {
2759 if ((memcmp (data, "if", 2) == 0) || (memcmp (data, "JN", 2) == 0)) {
2760 gst_type_find_suggest (tf, GST_TYPE_FIND_LIKELY, MOD_CAPS);
2764 if ((memcmp (data, "AMF", 3) == 0 && data[3] > 10 && data[3] < 14) ||
2766 (memcmp (data, "IMPM", 4) == 0) ||
2768 (memcmp (data, "MMD0", 4) == 0) || (memcmp (data, "MMD1", 4) == 0) ||
2770 (memcmp (data, "MTM", 3) == 0)) {
2771 gst_type_find_suggest (tf, GST_TYPE_FIND_MAXIMUM, MOD_CAPS);
2775 if (memcmp (data, "RIFF", 4) == 0) {
2776 guint8 *data2 = gst_type_find_peek (tf, 8, 4);
2779 if (memcmp (data2, "DSMF", 4) == 0) {
2780 gst_type_find_suggest (tf, GST_TYPE_FIND_MAXIMUM, MOD_CAPS);
2786 if (memcmp (data, "FAM\xFE", 4) == 0) {
2787 guint8 *data2 = gst_type_find_peek (tf, 44, 3);
2790 if (memcmp (data2, "compare", 3) == 0) {
2791 gst_type_find_suggest (tf, GST_TYPE_FIND_MAXIMUM, MOD_CAPS);
2795 gst_type_find_suggest (tf, GST_TYPE_FIND_LIKELY, MOD_CAPS);
2800 if (memcmp (data, "GDM\xFE", 4) == 0) {
2801 guint8 *data2 = gst_type_find_peek (tf, 71, 4);
2804 if (memcmp (data2, "GMFS", 4) == 0) {
2805 gst_type_find_suggest (tf, GST_TYPE_FIND_MAXIMUM, MOD_CAPS);
2809 gst_type_find_suggest (tf, GST_TYPE_FIND_LIKELY, MOD_CAPS);
2815 if ((data = gst_type_find_peek (tf, 60, 4)) != NULL) {
2816 if (memcmp (data, "IM10", 4) == 0) {
2817 gst_type_find_suggest (tf, GST_TYPE_FIND_MAXIMUM, MOD_CAPS);
2822 if ((data = gst_type_find_peek (tf, 44, 4)) != NULL) {
2823 if (memcmp (data, "SCRM", 4) == 0) {
2824 gst_type_find_suggest (tf, GST_TYPE_FIND_MAXIMUM, MOD_CAPS);
2829 if ((data = gst_type_find_peek (tf, 20, 8)) != NULL) {
2830 if (g_ascii_strncasecmp ((gchar *) data, "!Scream!", 8) == 0 ||
2831 g_ascii_strncasecmp ((gchar *) data, "BMOD2STM", 8) == 0) {
2832 guint8 *id, *stmtype;
2834 if ((id = gst_type_find_peek (tf, 28, 1)) == NULL)
2836 if ((stmtype = gst_type_find_peek (tf, 29, 1)) == NULL)
2838 if (*id == 0x1A && *stmtype == 2)
2839 gst_type_find_suggest (tf, GST_TYPE_FIND_MAXIMUM, MOD_CAPS);
2845 /*** application/x-shockwave-flash ***/
2847 static GstStaticCaps swf_caps =
2848 GST_STATIC_CAPS ("application/x-shockwave-flash");
2849 #define SWF_CAPS (gst_static_caps_get(&swf_caps))
2851 swf_type_find (GstTypeFind * tf, gpointer unused)
2853 guint8 *data = gst_type_find_peek (tf, 0, 4);
2855 if (data && (data[0] == 'F' || data[0] == 'C') &&
2856 data[1] == 'W' && data[2] == 'S') {
2857 gst_type_find_suggest (tf, GST_TYPE_FIND_MAXIMUM, SWF_CAPS);
2861 /*** image/jpeg ***/
2863 #define JPEG_MARKER_IS_START_OF_FRAME(x) \
2864 ((x)>=0xc0 && (x) <= 0xcf && (x)!=0xc4 && (x)!=0xc8 && (x)!=0xcc)
2866 static GstStaticCaps jpeg_caps = GST_STATIC_CAPS ("image/jpeg");
2868 #define JPEG_CAPS (gst_static_caps_get(&jpeg_caps))
2870 jpeg_type_find (GstTypeFind * tf, gpointer unused)
2872 GstTypeFindProbability prob = GST_TYPE_FIND_POSSIBLE;
2873 DataScanCtx c = { 0, NULL, 0 };
2877 if (G_UNLIKELY (!data_scan_ctx_ensure_data (tf, &c, 2)))
2880 if (c.data[0] != 0xff || c.data[1] != 0xd8)
2884 data_scan_ctx_advance (tf, &c, 2);
2886 caps = gst_caps_copy (JPEG_CAPS);
2888 while (data_scan_ctx_ensure_data (tf, &c, 4) && c.offset < (200 * 1024)) {
2892 if (c.data[0] != 0xff)
2896 if (G_UNLIKELY (marker == 0xff)) {
2897 data_scan_ctx_advance (tf, &c, 1);
2901 data_scan_ctx_advance (tf, &c, 2);
2903 /* we assume all markers we'll see before SOF have a payload length; if
2904 * that's not the case we'll just detect a false sync and bail out, but
2905 * still report POSSIBLE probability */
2906 len = GST_READ_UINT16_BE (c.data);
2908 GST_LOG ("possible JPEG marker 0x%02x (@0x%04x), segment length %u",
2909 marker, (guint) c.offset, len);
2911 if (!data_scan_ctx_ensure_data (tf, &c, len))
2914 if (marker == 0xc4 || /* DEFINE_HUFFMAN_TABLES */
2915 marker == 0xcc || /* DEFINE_ARITHMETIC_CONDITIONING */
2916 marker == 0xdb || /* DEFINE_QUANTIZATION_TABLES */
2917 marker == 0xdd || /* DEFINE_RESTART_INTERVAL */
2918 marker == 0xfe) { /* COMMENT */
2919 data_scan_ctx_advance (tf, &c, len);
2921 } else if (marker == 0xe0 && len >= (2 + 4) && /* APP0 */
2922 data_scan_ctx_memcmp (tf, &c, 2, "JFIF", 4)) {
2923 GST_LOG ("found JFIF tag");
2924 prob = GST_TYPE_FIND_MAXIMUM;
2925 data_scan_ctx_advance (tf, &c, len);
2927 /* we continue until we find a start of frame marker */
2928 } else if (marker == 0xe1 && len >= (2 + 4) && /* APP1 */
2929 data_scan_ctx_memcmp (tf, &c, 2, "Exif", 4)) {
2930 GST_LOG ("found Exif tag");
2931 prob = GST_TYPE_FIND_MAXIMUM;
2932 data_scan_ctx_advance (tf, &c, len);
2934 /* we continue until we find a start of frame marker */
2935 } else if (marker >= 0xe0 && marker <= 0xef) { /* APPn */
2936 data_scan_ctx_advance (tf, &c, len);
2938 } else if (JPEG_MARKER_IS_START_OF_FRAME (marker) && len >= (2 + 8)) {
2941 h = GST_READ_UINT16_BE (c.data + 2 + 1);
2942 w = GST_READ_UINT16_BE (c.data + 2 + 1 + 2);
2943 if (h == 0 || w == 0) {
2944 GST_WARNING ("bad width %u and/or height %u in SOF header", w, h);
2948 GST_LOG ("SOF at offset %" G_GUINT64_FORMAT ", num_markers=%d, "
2949 "WxH=%dx%d", c.offset - 2, num_markers, w, h);
2951 if (num_markers >= 5 || prob == GST_TYPE_FIND_MAXIMUM)
2952 prob = GST_TYPE_FIND_MAXIMUM;
2954 prob = GST_TYPE_FIND_LIKELY;
2956 gst_caps_set_simple (caps, "width", G_TYPE_INT, w,
2957 "height", G_TYPE_INT, h, NULL);
2960 GST_WARNING ("bad length or unexpected JPEG marker 0xff 0x%02x", marker);
2965 gst_type_find_suggest (tf, prob, caps);
2966 gst_caps_unref (caps);
2971 static GstStaticCaps bmp_caps = GST_STATIC_CAPS ("image/bmp");
2973 #define BMP_CAPS (gst_static_caps_get(&bmp_caps))
2975 bmp_type_find (GstTypeFind * tf, gpointer unused)
2977 DataScanCtx c = { 0, NULL, 0 };
2978 guint32 struct_size, w, h, planes, bpp;
2980 if (G_UNLIKELY (!data_scan_ctx_ensure_data (tf, &c, 54)))
2983 if (c.data[0] != 'B' || c.data[1] != 'M')
2986 /* skip marker + size */
2987 data_scan_ctx_advance (tf, &c, 2 + 4);
2989 /* reserved, must be 0 */
2990 if (c.data[0] != 0 || c.data[1] != 0 || c.data[2] != 0 || c.data[3] != 0)
2993 data_scan_ctx_advance (tf, &c, 2 + 2);
2995 /* offset to start of image data in bytes (check for sanity) */
2996 GST_LOG ("offset=%u", GST_READ_UINT32_LE (c.data));
2997 if (GST_READ_UINT32_LE (c.data) > (10 * 1024 * 1024))
3000 struct_size = GST_READ_UINT32_LE (c.data + 4);
3001 GST_LOG ("struct_size=%u", struct_size);
3003 data_scan_ctx_advance (tf, &c, 4 + 4);
3005 if (struct_size == 0x0C) {
3006 w = GST_READ_UINT16_LE (c.data);
3007 h = GST_READ_UINT16_LE (c.data + 2);
3008 planes = GST_READ_UINT16_LE (c.data + 2 + 2);
3009 bpp = GST_READ_UINT16_LE (c.data + 2 + 2 + 2);
3010 } else if (struct_size == 40 || struct_size == 64 || struct_size == 108
3011 || struct_size == 124 || struct_size == 0xF0) {
3012 w = GST_READ_UINT32_LE (c.data);
3013 h = GST_READ_UINT32_LE (c.data + 4);
3014 planes = GST_READ_UINT16_LE (c.data + 4 + 4);
3015 bpp = GST_READ_UINT16_LE (c.data + 4 + 4 + 2);
3020 /* image sizes sanity check */
3021 GST_LOG ("w=%u, h=%u, planes=%u, bpp=%u", w, h, planes, bpp);
3022 if (w == 0 || w > 0xfffff || h == 0 || h > 0xfffff || planes != 1 ||
3023 (bpp != 1 && bpp != 4 && bpp != 8 && bpp != 16 && bpp != 24 && bpp != 32))
3026 gst_type_find_suggest_simple (tf, GST_TYPE_FIND_MAXIMUM, "image/bmp",
3027 "width", G_TYPE_INT, w, "height", G_TYPE_INT, h, "bpp", G_TYPE_INT, bpp,
3031 /*** image/tiff ***/
3032 static GstStaticCaps tiff_caps = GST_STATIC_CAPS ("image/tiff, "
3033 "endianness = (int) { BIG_ENDIAN, LITTLE_ENDIAN }");
3034 #define TIFF_CAPS (gst_static_caps_get(&tiff_caps))
3035 static GstStaticCaps tiff_be_caps = GST_STATIC_CAPS ("image/tiff, "
3036 "endianness = (int) BIG_ENDIAN");
3037 #define TIFF_BE_CAPS (gst_static_caps_get(&tiff_be_caps))
3038 static GstStaticCaps tiff_le_caps = GST_STATIC_CAPS ("image/tiff, "
3039 "endianness = (int) LITTLE_ENDIAN");
3040 #define TIFF_LE_CAPS (gst_static_caps_get(&tiff_le_caps))
3042 tiff_type_find (GstTypeFind * tf, gpointer ununsed)
3044 guint8 *data = gst_type_find_peek (tf, 0, 8);
3045 guint8 le_header[4] = { 0x49, 0x49, 0x2A, 0x00 };
3046 guint8 be_header[4] = { 0x4D, 0x4D, 0x00, 0x2A };
3049 if (memcmp (data, le_header, 4) == 0) {
3050 gst_type_find_suggest (tf, GST_TYPE_FIND_MAXIMUM, TIFF_LE_CAPS);
3051 } else if (memcmp (data, be_header, 4) == 0) {
3052 gst_type_find_suggest (tf, GST_TYPE_FIND_MAXIMUM, TIFF_BE_CAPS);
3059 static GstStaticCaps pnm_caps = GST_STATIC_CAPS ("image/x-portable-bitmap; "
3060 "image/x-portable-graymap; image/x-portable-pixmap; "
3061 "image/x-portable-anymap");
3063 #define PNM_CAPS (gst_static_caps_get(&pnm_caps))
3065 #define IS_PNM_WHITESPACE(c) \
3066 ((c) == ' ' || (c) == '\r' || (c) == '\n' || (c) == 't')
3069 pnm_type_find (GstTypeFind * tf, gpointer ununsed)
3071 const gchar *media_type = NULL;
3072 DataScanCtx c = { 0, NULL, 0 };
3075 if (G_UNLIKELY (!data_scan_ctx_ensure_data (tf, &c, 16)))
3078 /* see http://en.wikipedia.org/wiki/Netpbm_format */
3079 if (c.data[0] != 'P' || c.data[1] < '1' || c.data[1] > '7' ||
3080 !IS_PNM_WHITESPACE (c.data[2]) ||
3081 (c.data[3] != '#' && c.data[3] < '0' && c.data[3] > '9'))
3084 switch (c.data[1]) {
3086 media_type = "image/x-portable-bitmap"; /* ASCII */
3089 media_type = "image/x-portable-graymap"; /* ASCII */
3092 media_type = "image/x-portable-pixmap"; /* ASCII */
3095 media_type = "image/x-portable-bitmap"; /* Raw */
3098 media_type = "image/x-portable-graymap"; /* Raw */
3101 media_type = "image/x-portable-pixmap"; /* Raw */
3104 media_type = "image/x-portable-anymap";
3107 g_return_if_reached ();
3110 /* try to extract width and height as well */
3111 if (c.data[1] != '7') {
3112 gchar s[64] = { 0, }
3115 /* need to skip any comment lines first */
3116 data_scan_ctx_advance (tf, &c, 3);
3117 while (c.data[0] == '#') { /* we know there's still data left */
3118 data_scan_ctx_advance (tf, &c, 1);
3119 while (c.data[0] != '\n' && c.data[0] != '\r') {
3120 if (!data_scan_ctx_ensure_data (tf, &c, 4))
3122 data_scan_ctx_advance (tf, &c, 1);
3124 data_scan_ctx_advance (tf, &c, 1);
3125 GST_LOG ("skipped comment line in PNM header");
3128 if (!data_scan_ctx_ensure_data (tf, &c, 32) &&
3129 !data_scan_ctx_ensure_data (tf, &c, 4)) {
3133 /* need to NUL-terminate data for sscanf */
3134 memcpy (s, c.data, MIN (sizeof (s) - 1, c.size));
3135 if (sscanf (s, "%u%c%u%c", &w, &sep1, &h, &sep2) == 4 &&
3136 IS_PNM_WHITESPACE (sep1) && IS_PNM_WHITESPACE (sep2) &&
3137 w > 0 && w < G_MAXINT && h > 0 && h < G_MAXINT) {
3138 GST_LOG ("extracted PNM width and height: %dx%d", w, h);
3144 /* FIXME: extract width + height for anymaps too */
3147 if (w > 0 && h > 0) {
3148 gst_type_find_suggest_simple (tf, GST_TYPE_FIND_MAXIMUM, media_type,
3149 "width", G_TYPE_INT, w, "height", G_TYPE_INT, h, NULL);
3151 gst_type_find_suggest_simple (tf, GST_TYPE_FIND_LIKELY, media_type, NULL);
3155 static GstStaticCaps sds_caps = GST_STATIC_CAPS ("audio/x-sds");
3157 #define SDS_CAPS (gst_static_caps_get(&sds_caps))
3159 sds_type_find (GstTypeFind * tf, gpointer ununsed)
3161 guint8 *data = gst_type_find_peek (tf, 0, 4);
3162 guint8 mask[4] = { 0xFF, 0xFF, 0x80, 0xFF };
3163 guint8 match[4] = { 0xF0, 0x7E, 0, 0x01 };
3167 for (x = 0; x < 4; x++) {
3168 if ((data[x] & mask[x]) != match[x]) {
3172 gst_type_find_suggest (tf, GST_TYPE_FIND_MAXIMUM, SDS_CAPS);
3176 static GstStaticCaps ircam_caps = GST_STATIC_CAPS ("audio/x-ircam");
3178 #define IRCAM_CAPS (gst_static_caps_get(&ircam_caps))
3180 ircam_type_find (GstTypeFind * tf, gpointer ununsed)
3182 guint8 *data = gst_type_find_peek (tf, 0, 4);
3183 guint8 mask[4] = { 0xFF, 0xFF, 0xF8, 0xFF };
3184 guint8 match[4] = { 0x64, 0xA3, 0x00, 0x00 };
3186 gboolean matched = TRUE;
3191 for (x = 0; x < 4; x++) {
3192 if ((data[x] & mask[x]) != match[x]) {
3197 gst_type_find_suggest (tf, GST_TYPE_FIND_MAXIMUM, IRCAM_CAPS);
3200 /* now try the reverse version */
3202 for (x = 0; x < 4; x++) {
3203 if ((data[x] & mask[3 - x]) != match[3 - x]) {
3209 /* EBML typefind helper */
3211 ebml_check_header (GstTypeFind * tf, const gchar * doctype, int doctype_len)
3213 /* 4 bytes for EBML ID, 1 byte for header length identifier */
3214 guint8 *data = gst_type_find_peek (tf, 0, 4 + 1);
3215 gint len_mask = 0x80, size = 1, n = 1, total;
3221 if (data[0] != 0x1A || data[1] != 0x45 || data[2] != 0xDF || data[3] != 0xA3)
3224 /* length of header */
3226 while (size <= 8 && !(total & len_mask)) {
3232 total &= (len_mask - 1);
3234 total = (total << 8) | data[4 + n++];
3236 /* get new data for full header, 4 bytes for EBML ID,
3237 * EBML length tag and the actual header */
3238 data = gst_type_find_peek (tf, 0, 4 + size + total);
3242 /* only check doctype if asked to do so */
3243 if (doctype == NULL || doctype_len == 0)
3246 /* the header must contain the doctype. For now, we don't parse the
3247 * whole header but simply check for the availability of that array
3248 * of characters inside the header. Not fully fool-proof, but good
3250 for (n = 4 + size; n <= 4 + size + total - doctype_len; n++)
3251 if (!memcmp (&data[n], doctype, doctype_len))
3257 /*** video/x-matroska ***/
3258 static GstStaticCaps matroska_caps = GST_STATIC_CAPS ("video/x-matroska");
3260 #define MATROSKA_CAPS (gst_static_caps_get(&matroska_caps))
3262 matroska_type_find (GstTypeFind * tf, gpointer ununsed)
3264 if (ebml_check_header (tf, "matroska", 8))
3265 gst_type_find_suggest (tf, GST_TYPE_FIND_MAXIMUM, MATROSKA_CAPS);
3266 else if (ebml_check_header (tf, NULL, 0))
3267 gst_type_find_suggest (tf, GST_TYPE_FIND_LIKELY, MATROSKA_CAPS);
3270 /*** video/webm ***/
3271 static GstStaticCaps webm_caps = GST_STATIC_CAPS ("video/webm");
3273 #define WEBM_CAPS (gst_static_caps_get(&webm_caps))
3275 webm_type_find (GstTypeFind * tf, gpointer ununsed)
3277 if (ebml_check_header (tf, "webm", 4))
3278 gst_type_find_suggest (tf, GST_TYPE_FIND_MAXIMUM, WEBM_CAPS);
3281 /*** application/mxf ***/
3282 static GstStaticCaps mxf_caps = GST_STATIC_CAPS ("application/mxf");
3284 #define MXF_MAX_PROBE_LENGTH (1024 * 64)
3285 #define MXF_CAPS (gst_static_caps_get(&mxf_caps))
3288 * MXF files start with a header partition pack key of 16 bytes which is defined
3289 * at SMPTE-377M 6.1. Before this there can be up to 64K of run-in which _must_
3290 * not contain the partition pack key.
3293 mxf_type_find (GstTypeFind * tf, gpointer ununsed)
3295 static const guint8 partition_pack_key[] =
3296 { 0x06, 0x0e, 0x2b, 0x34, 0x02, 0x05, 0x01, 0x01, 0x0d, 0x01, 0x02, 0x01,
3299 DataScanCtx c = { 0, NULL, 0 };
3301 while (c.offset <= MXF_MAX_PROBE_LENGTH) {
3303 if (G_UNLIKELY (!data_scan_ctx_ensure_data (tf, &c, 1024)))
3306 /* look over in chunks of 1kbytes to avoid too much overhead */
3308 for (i = 0; i < 1024 - 16; i++) {
3309 /* Check first byte before calling more expensive memcmp function */
3310 if (G_UNLIKELY (c.data[i] == 0x06
3311 && memcmp (c.data + i, partition_pack_key, 13) == 0)) {
3312 /* Header partition pack? */
3313 if (c.data[i + 13] != 0x02)
3316 /* Partition status */
3317 if (c.data[i + 14] >= 0x05)
3320 /* Reserved, must be 0x00 */
3321 if (c.data[i + 15] != 0x00)
3324 gst_type_find_suggest (tf, GST_TYPE_FIND_MAXIMUM, MXF_CAPS);
3330 data_scan_ctx_advance (tf, &c, 1024 - 16);
3334 /*** video/x-dv ***/
3336 static GstStaticCaps dv_caps = GST_STATIC_CAPS ("video/x-dv, "
3337 "systemstream = (boolean) true");
3338 #define DV_CAPS (gst_static_caps_get(&dv_caps))
3340 dv_type_find (GstTypeFind * tf, gpointer private)
3344 data = gst_type_find_peek (tf, 0, 5);
3346 /* check for DIF and DV flag */
3347 if (data && (data[0] == 0x1f) && (data[1] == 0x07) && (data[2] == 0x00)) {
3348 const gchar *format;
3350 if (data[3] & 0x80) {
3356 gst_type_find_suggest_simple (tf, GST_TYPE_FIND_MAXIMUM, "video/x-dv",
3357 "systemstream", G_TYPE_BOOLEAN, TRUE,
3358 "format", G_TYPE_STRING, format, NULL);
3363 /*** application/ogg and application/x-annodex ***/
3364 static GstStaticCaps ogg_caps = GST_STATIC_CAPS ("application/ogg");
3365 static GstStaticCaps annodex_caps = GST_STATIC_CAPS ("application/x-annodex");
3366 static GstStaticCaps ogg_annodex_caps =
3367 GST_STATIC_CAPS ("application/ogg;application/x-annodex");
3369 #define OGGANX_CAPS (gst_static_caps_get(&ogg_annodex_caps))
3372 ogganx_type_find (GstTypeFind * tf, gpointer private)
3374 guint8 *data = gst_type_find_peek (tf, 0, 4);
3376 if ((data != NULL) && (memcmp (data, "OggS", 4) == 0)) {
3378 /* Check for an annodex fishbone header */
3379 data = gst_type_find_peek (tf, 28, 8);
3380 if (data && memcmp (data, "fishead\0", 8) == 0)
3381 gst_type_find_suggest (tf, GST_TYPE_FIND_MAXIMUM,
3382 gst_static_caps_get (&annodex_caps));
3384 gst_type_find_suggest (tf, GST_TYPE_FIND_MAXIMUM,
3385 gst_static_caps_get (&ogg_caps));
3389 /*** audio/x-vorbis ***/
3390 static GstStaticCaps vorbis_caps = GST_STATIC_CAPS ("audio/x-vorbis");
3392 #define VORBIS_CAPS (gst_static_caps_get(&vorbis_caps))
3394 vorbis_type_find (GstTypeFind * tf, gpointer private)
3396 guint8 *data = gst_type_find_peek (tf, 0, 30);
3402 /* 1 byte packet type (identification=0x01)
3403 6 byte string "vorbis"
3404 4 byte vorbis version */
3405 if (memcmp (data, "\001vorbis\000\000\000\000", 11) != 0)
3408 /* 1 byte channels must be != 0 */
3412 /* 4 byte samplerate must be != 0 */
3413 if (GST_READ_UINT32_LE (data) == 0)
3416 /* blocksize checks */
3417 blocksize_0 = data[0] & 0x0F;
3418 blocksize_1 = (data[0] & 0xF0) >> 4;
3419 if (blocksize_0 > blocksize_1)
3421 if (blocksize_0 < 6 || blocksize_0 > 13)
3423 if (blocksize_1 < 6 || blocksize_1 > 13)
3427 if ((data[0] & 0x01) != 1)
3429 gst_type_find_suggest (tf, GST_TYPE_FIND_MAXIMUM, VORBIS_CAPS);
3433 /*** video/x-theora ***/
3435 static GstStaticCaps theora_caps = GST_STATIC_CAPS ("video/x-theora");
3437 #define THEORA_CAPS (gst_static_caps_get(&theora_caps))
3439 theora_type_find (GstTypeFind * tf, gpointer private)
3441 guint8 *data = gst_type_find_peek (tf, 0, 7); //42);
3444 if (data[0] != 0x80)
3446 if (memcmp (&data[1], "theora", 6) != 0)
3448 /* FIXME: make this more reliable when specs are out */
3450 gst_type_find_suggest (tf, GST_TYPE_FIND_MAXIMUM, THEORA_CAPS);
3456 kate_type_find (GstTypeFind * tf, gpointer private)
3458 guint8 *data = gst_type_find_peek (tf, 0, 64);
3459 gchar category[16] = { 0, };
3461 if (G_UNLIKELY (data == NULL))
3464 /* see: http://wiki.xiph.org/index.php/OggKate#Format_specification */
3465 if (G_LIKELY (memcmp (data, "\200kate\0\0\0", 8) != 0))
3468 /* make sure we always have a NUL-terminated string */
3469 memcpy (category, data + 48, 15);
3470 GST_LOG ("kate category: %s", category);
3471 /* canonical categories for subtitles: subtitles, spu-subtitles, SUB, K-SPU */
3472 if (strcmp (category, "subtitles") == 0 || strcmp (category, "SUB") == 0 ||
3473 strcmp (category, "spu-subtitles") == 0 ||
3474 strcmp (category, "K-SPU") == 0) {
3475 gst_type_find_suggest_simple (tf, GST_TYPE_FIND_MAXIMUM,
3476 "subtitle/x-kate", NULL);
3478 gst_type_find_suggest_simple (tf, GST_TYPE_FIND_MAXIMUM,
3479 "application/x-kate", NULL);
3483 /*** application/x-ogm-video or audio***/
3485 static GstStaticCaps ogmvideo_caps =
3486 GST_STATIC_CAPS ("application/x-ogm-video");
3487 #define OGMVIDEO_CAPS (gst_static_caps_get(&ogmvideo_caps))
3489 ogmvideo_type_find (GstTypeFind * tf, gpointer private)
3491 guint8 *data = gst_type_find_peek (tf, 0, 9);
3494 if (memcmp (data, "\001video\000\000\000", 9) != 0)
3496 gst_type_find_suggest (tf, GST_TYPE_FIND_MAXIMUM, OGMVIDEO_CAPS);
3500 static GstStaticCaps ogmaudio_caps =
3501 GST_STATIC_CAPS ("application/x-ogm-audio");
3502 #define OGMAUDIO_CAPS (gst_static_caps_get(&ogmaudio_caps))
3504 ogmaudio_type_find (GstTypeFind * tf, gpointer private)
3506 guint8 *data = gst_type_find_peek (tf, 0, 9);
3509 if (memcmp (data, "\001audio\000\000\000", 9) != 0)
3511 gst_type_find_suggest (tf, GST_TYPE_FIND_MAXIMUM, OGMAUDIO_CAPS);
3515 static GstStaticCaps ogmtext_caps = GST_STATIC_CAPS ("application/x-ogm-text");
3517 #define OGMTEXT_CAPS (gst_static_caps_get(&ogmtext_caps))
3519 ogmtext_type_find (GstTypeFind * tf, gpointer private)
3521 guint8 *data = gst_type_find_peek (tf, 0, 9);
3524 if (memcmp (data, "\001text\000\000\000\000", 9) != 0)
3526 gst_type_find_suggest (tf, GST_TYPE_FIND_MAXIMUM, OGMTEXT_CAPS);
3530 /*** audio/x-speex ***/
3532 static GstStaticCaps speex_caps = GST_STATIC_CAPS ("audio/x-speex");
3534 #define SPEEX_CAPS (gst_static_caps_get(&speex_caps))
3536 speex_type_find (GstTypeFind * tf, gpointer private)
3538 guint8 *data = gst_type_find_peek (tf, 0, 80);
3541 /* 8 byte string "Speex "
3542 24 byte speex version string + int */
3543 if (memcmp (data, "Speex ", 8) != 0)
3547 /* 4 byte header size >= 80 */
3548 if (GST_READ_UINT32_LE (data) < 80)
3552 /* 4 byte sample rate <= 48000 */
3553 if (GST_READ_UINT32_LE (data) > 48000)
3557 /* currently there are only 3 speex modes. */
3558 if (GST_READ_UINT32_LE (data) > 3)
3562 gst_type_find_suggest (tf, GST_TYPE_FIND_MAXIMUM, SPEEX_CAPS);
3566 /*** audio/x-celt ***/
3568 static GstStaticCaps celt_caps = GST_STATIC_CAPS ("audio/x-celt");
3570 #define CELT_CAPS (gst_static_caps_get(&celt_caps))
3572 celt_type_find (GstTypeFind * tf, gpointer private)
3574 guint8 *data = gst_type_find_peek (tf, 0, 8);
3577 /* 8 byte string "CELT " */
3578 if (memcmp (data, "CELT ", 8) != 0)
3581 /* TODO: Check other values of the CELT header */
3582 gst_type_find_suggest (tf, GST_TYPE_FIND_MAXIMUM, CELT_CAPS);
3586 /*** application/x-ogg-skeleton ***/
3587 static GstStaticCaps ogg_skeleton_caps =
3588 GST_STATIC_CAPS ("application/x-ogg-skeleton, parsed=(boolean)FALSE");
3589 #define OGG_SKELETON_CAPS (gst_static_caps_get(&ogg_skeleton_caps))
3591 oggskel_type_find (GstTypeFind * tf, gpointer private)
3593 guint8 *data = gst_type_find_peek (tf, 0, 12);
3596 /* 8 byte string "fishead\0" for the ogg skeleton stream */
3597 if (memcmp (data, "fishead\0", 8) != 0)
3601 /* Require that the header contains version 3.0 */
3602 if (GST_READ_UINT16_LE (data) != 3)
3605 if (GST_READ_UINT16_LE (data) != 0)
3608 gst_type_find_suggest (tf, GST_TYPE_FIND_MAXIMUM, OGG_SKELETON_CAPS);
3612 static GstStaticCaps cmml_caps = GST_STATIC_CAPS ("text/x-cmml");
3614 #define CMML_CAPS (gst_static_caps_get(&cmml_caps))
3616 cmml_type_find (GstTypeFind * tf, gpointer private)
3618 /* Header is 12 bytes minimum (though we don't check the minor version */
3619 guint8 *data = gst_type_find_peek (tf, 0, 12);
3623 /* 8 byte string "CMML\0\0\0\0" for the magic number */
3624 if (memcmp (data, "CMML\0\0\0\0", 8) != 0)
3628 /* Require that the header contains at least version 2.0 */
3629 if (GST_READ_UINT16_LE (data) < 2)
3632 gst_type_find_suggest (tf, GST_TYPE_FIND_MAXIMUM, CMML_CAPS);
3636 /*** application/x-tar ***/
3638 static GstStaticCaps tar_caps = GST_STATIC_CAPS ("application/x-tar");
3640 #define TAR_CAPS (gst_static_caps_get(&tar_caps))
3641 #define OLDGNU_MAGIC "ustar " /* 7 chars and a NUL */
3642 #define NEWGNU_MAGIC "ustar" /* 5 chars and a NUL */
3644 tar_type_find (GstTypeFind * tf, gpointer unused)
3646 guint8 *data = gst_type_find_peek (tf, 257, 8);
3648 /* of course we are not certain, but we don't want other typefind funcs
3649 * to detect formats of files within the tar archive, e.g. mp3s */
3651 if (memcmp (data, OLDGNU_MAGIC, 8) == 0) { /* sic */
3652 gst_type_find_suggest (tf, GST_TYPE_FIND_NEARLY_CERTAIN, TAR_CAPS);
3653 } else if (memcmp (data, NEWGNU_MAGIC, 6) == 0 && /* sic */
3654 g_ascii_isdigit (data[6]) && g_ascii_isdigit (data[7])) {
3655 gst_type_find_suggest (tf, GST_TYPE_FIND_NEARLY_CERTAIN, TAR_CAPS);
3660 /*** application/x-ar ***/
3662 static GstStaticCaps ar_caps = GST_STATIC_CAPS ("application/x-ar");
3664 #define AR_CAPS (gst_static_caps_get(&ar_caps))
3666 ar_type_find (GstTypeFind * tf, gpointer unused)
3668 guint8 *data = gst_type_find_peek (tf, 0, 24);
3670 if (data && memcmp (data, "!<arch>", 7) == 0) {
3673 for (i = 7; i < 24; ++i) {
3674 if (!g_ascii_isprint (data[i]) && data[i] != '\n') {
3675 gst_type_find_suggest (tf, GST_TYPE_FIND_POSSIBLE, AR_CAPS);
3679 gst_type_find_suggest (tf, GST_TYPE_FIND_NEARLY_CERTAIN, AR_CAPS);
3683 /*** audio/x-au ***/
3685 /* NOTE: we cannot replace this function with TYPE_FIND_REGISTER_START_WITH,
3686 * as it is only possible to register one typefind factory per 'name'
3687 * (which is in this case the caps), and the first one would be replaced by
3688 * the second one. */
3689 static GstStaticCaps au_caps = GST_STATIC_CAPS ("audio/x-au");
3691 #define AU_CAPS (gst_static_caps_get(&au_caps))
3693 au_type_find (GstTypeFind * tf, gpointer unused)
3695 guint8 *data = gst_type_find_peek (tf, 0, 4);
3698 if (memcmp (data, ".snd", 4) == 0 || memcmp (data, "dns.", 4) == 0) {
3699 gst_type_find_suggest (tf, GST_TYPE_FIND_MAXIMUM, AU_CAPS);
3705 /*** video/x-nuv ***/
3707 /* NOTE: we cannot replace this function with TYPE_FIND_REGISTER_START_WITH,
3708 * as it is only possible to register one typefind factory per 'name'
3709 * (which is in this case the caps), and the first one would be replaced by
3710 * the second one. */
3711 static GstStaticCaps nuv_caps = GST_STATIC_CAPS ("video/x-nuv");
3713 #define NUV_CAPS (gst_static_caps_get(&nuv_caps))
3715 nuv_type_find (GstTypeFind * tf, gpointer unused)
3717 guint8 *data = gst_type_find_peek (tf, 0, 11);
3720 if (memcmp (data, "MythTVVideo", 11) == 0
3721 || memcmp (data, "NuppelVideo", 11) == 0) {
3722 gst_type_find_suggest (tf, GST_TYPE_FIND_MAXIMUM, NUV_CAPS);
3727 /*** audio/x-paris ***/
3728 /* NOTE: do not replace this function with two TYPE_FIND_REGISTER_START_WITH */
3729 static GstStaticCaps paris_caps = GST_STATIC_CAPS ("audio/x-paris");
3731 #define PARIS_CAPS (gst_static_caps_get(&paris_caps))
3733 paris_type_find (GstTypeFind * tf, gpointer unused)
3735 guint8 *data = gst_type_find_peek (tf, 0, 4);
3738 if (memcmp (data, " paf", 4) == 0 || memcmp (data, "fap ", 4) == 0) {
3739 gst_type_find_suggest (tf, GST_TYPE_FIND_MAXIMUM, PARIS_CAPS);
3744 /*** audio/iLBC-sh ***/
3745 /* NOTE: do not replace this function with two TYPE_FIND_REGISTER_START_WITH */
3746 static GstStaticCaps ilbc_caps = GST_STATIC_CAPS ("audio/iLBC-sh");
3748 #define ILBC_CAPS (gst_static_caps_get(&ilbc_caps))
3750 ilbc_type_find (GstTypeFind * tf, gpointer unused)
3752 guint8 *data = gst_type_find_peek (tf, 0, 8);
3755 if (memcmp (data, "#!iLBC30", 8) == 0 || memcmp (data, "#!iLBC20", 8) == 0) {
3756 gst_type_find_suggest (tf, GST_TYPE_FIND_LIKELY, ILBC_CAPS);
3761 /*** application/x-ms-dos-executable ***/
3763 static GstStaticCaps msdos_caps =
3764 GST_STATIC_CAPS ("application/x-ms-dos-executable");
3765 #define MSDOS_CAPS (gst_static_caps_get(&msdos_caps))
3766 /* see http://www.madchat.org/vxdevl/papers/winsys/pefile/pefile.htm */
3768 msdos_type_find (GstTypeFind * tf, gpointer unused)
3770 guint8 *data = gst_type_find_peek (tf, 0, 64);
3772 if (data && data[0] == 'M' && data[1] == 'Z' &&
3773 GST_READ_UINT16_LE (data + 8) == 4) {
3774 guint32 pe_offset = GST_READ_UINT32_LE (data + 60);
3776 data = gst_type_find_peek (tf, pe_offset, 2);
3777 if (data && data[0] == 'P' && data[1] == 'E') {
3778 gst_type_find_suggest (tf, GST_TYPE_FIND_NEARLY_CERTAIN, MSDOS_CAPS);
3783 /*** application/x-mmsh ***/
3785 static GstStaticCaps mmsh_caps = GST_STATIC_CAPS ("application/x-mmsh");
3787 #define MMSH_CAPS gst_static_caps_get(&mmsh_caps)
3789 /* This is to recognise mssh-over-http */
3791 mmsh_type_find (GstTypeFind * tf, gpointer unused)
3793 static const guint8 asf_marker[16] = { 0x30, 0x26, 0xb2, 0x75, 0x8e, 0x66,
3794 0xcf, 0x11, 0xa6, 0xd9, 0x00, 0xaa, 0x00, 0x62, 0xce, 0x6c
3799 data = gst_type_find_peek (tf, 0, 2 + 2 + 4 + 2 + 2 + 16);
3800 if (data && data[0] == 0x24 && data[1] == 0x48 &&
3801 GST_READ_UINT16_LE (data + 2) > 2 + 2 + 4 + 2 + 2 + 16 &&
3802 memcmp (data + 2 + 2 + 4 + 2 + 2, asf_marker, 16) == 0) {
3803 gst_type_find_suggest (tf, GST_TYPE_FIND_LIKELY, MMSH_CAPS);
3807 /*** video/x-dirac ***/
3809 /* NOTE: we cannot replace this function with TYPE_FIND_REGISTER_START_WITH,
3810 * as it is only possible to register one typefind factory per 'name'
3811 * (which is in this case the caps), and the first one would be replaced by
3812 * the second one. */
3813 static GstStaticCaps dirac_caps = GST_STATIC_CAPS ("video/x-dirac");
3815 #define DIRAC_CAPS (gst_static_caps_get(&dirac_caps))
3817 dirac_type_find (GstTypeFind * tf, gpointer unused)
3819 guint8 *data = gst_type_find_peek (tf, 0, 8);
3822 if (memcmp (data, "BBCD", 4) == 0 || memcmp (data, "KW-DIRAC", 8) == 0) {
3823 gst_type_find_suggest (tf, GST_TYPE_FIND_MAXIMUM, DIRAC_CAPS);
3828 /*** video/vivo ***/
3830 static GstStaticCaps vivo_caps = GST_STATIC_CAPS ("video/vivo");
3832 #define VIVO_CAPS gst_static_caps_get(&vivo_caps)
3835 vivo_type_find (GstTypeFind * tf, gpointer unused)
3837 static const guint8 vivo_marker[] = { 'V', 'e', 'r', 's', 'i', 'o', 'n',
3838 ':', 'V', 'i', 'v', 'o', '/'
3843 data = gst_type_find_peek (tf, 0, 1024);
3844 if (data == NULL || data[0] != 0x00)
3847 if ((data[1] & 0x80)) {
3848 if ((data[2] & 0x80))
3850 hdr_len = ((guint) (data[1] & 0x7f)) << 7;
3860 /* 1008 = 1022 - strlen ("Version:Vivo/") - 1 */
3861 while (pos < 1008 && data[pos] == '\r' && data[pos + 1] == '\n')
3864 if (memcmp (data + pos, vivo_marker, sizeof (vivo_marker)) == 0) {
3865 gst_type_find_suggest (tf, GST_TYPE_FIND_MAXIMUM, VIVO_CAPS);
3869 /*** XDG MIME typefinder (to avoid false positives mostly) ***/
3873 xdgmime_typefind (GstTypeFind * find, gpointer user_data)
3876 gsize length = 16384;
3881 if ((tf_length = gst_type_find_get_length (find)) > 0)
3882 length = MIN (length, tf_length);
3884 if ((data = gst_type_find_peek (find, 0, length)) == NULL)
3887 tmp = g_content_type_guess (NULL, data, length, NULL);
3888 if (tmp == NULL || g_content_type_is_unknown (tmp)) {
3893 mimetype = g_content_type_get_mime_type (tmp);
3896 if (mimetype == NULL)
3899 GST_DEBUG ("Got mimetype '%s'", mimetype);
3901 /* Ignore audio/video types:
3902 * - our own typefinders in -base are likely to be better at this
3903 * (and if they're not, we really want to fix them, that's why we don't
3904 * report xdg-detected audio/video types at all, not even with a low
3906 * - we want to detect GStreamer media types and not MIME types
3907 * - the purpose of this xdg mime finder is mainly to prevent false
3908 * positives of non-media formats, not to typefind audio/video formats */
3909 if (g_str_has_prefix (mimetype, "audio/") ||
3910 g_str_has_prefix (mimetype, "video/")) {
3911 GST_LOG ("Ignoring audio/video mime type");
3916 /* Again, we mainly want the xdg typefinding to prevent false-positives on
3917 * non-media formats, so suggest the type with a probability that trumps
3918 * uncertain results of our typefinders, but not more than that. */
3919 GST_LOG ("Suggesting '%s' with probability POSSIBLE", mimetype);
3920 gst_type_find_suggest_simple (find, GST_TYPE_FIND_POSSIBLE, mimetype, NULL);
3923 #endif /* USE_GIO */
3925 /*** Windows icon typefinder (to avoid false positives mostly) ***/
3928 windows_icon_typefind (GstTypeFind * find, gpointer user_data)
3932 guint16 type, nimages;
3933 gint32 size, offset;
3935 datalen = gst_type_find_get_length (find);
3936 if ((data = gst_type_find_peek (find, 0, 6)) == NULL)
3939 /* header - simple and not enough to rely on it alone */
3940 if (GST_READ_UINT16_LE (data) != 0)
3942 type = GST_READ_UINT16_LE (data + 2);
3943 if (type != 1 && type != 2)
3945 nimages = GST_READ_UINT16_LE (data + 4);
3946 if (nimages == 0) /* we can assume we can't have an empty image file ? */
3950 if (data[6 + 3] != 0)
3953 guint16 planes = GST_READ_UINT16_LE (data + 6 + 4);
3957 size = GST_READ_UINT32_LE (data + 6 + 8);
3958 offset = GST_READ_UINT32_LE (data + 6 + 12);
3959 if (offset < 0 || size <= 0 || size >= datalen || offset >= datalen
3960 || size + offset > datalen)
3963 gst_type_find_suggest_simple (find, GST_TYPE_FIND_NEARLY_CERTAIN,
3964 "image/x-icon", NULL);
3968 /*** DEGAS Atari images (also to avoid false positives, see #625129) ***/
3970 degas_type_find (GstTypeFind * tf, gpointer private)
3972 /* No magic, but it should have a fixed size and a few invalid values */
3973 /* http://www.fileformat.info/format/atari/spec/6ecf9f6eb5be494284a47feb8a214687/view.htm */
3979 len = gst_type_find_get_length (tf);
3980 if (len < 34) /* smallest header of the lot */
3982 data = gst_type_find_peek (tf, 0, 4);
3983 resolution = GST_READ_UINT16_BE (data);
3985 /* could be DEGAS */
3986 if (resolution <= 2)
3987 gst_type_find_suggest_simple (tf, GST_TYPE_FIND_POSSIBLE + 5,
3988 "image/x-degas", NULL);
3989 } else if (len == 32066) {
3990 /* could be DEGAS Elite */
3991 if (resolution <= 2) {
3992 data = gst_type_find_peek (tf, len - 16, 8);
3993 for (n = 0; n < 4; n++) {
3994 if (GST_READ_UINT16_BE (data + n * 2) > 2)
3997 gst_type_find_suggest_simple (tf, GST_TYPE_FIND_POSSIBLE + 5,
3998 "image/x-degas", NULL);
4000 } else if (len >= 66 && len < 32066) {
4001 /* could be compressed DEGAS Elite, but it's compressed and so we can't rely on size,
4002 it does have 4 16 bytes values near the end that are 0-2 though. */
4003 if ((resolution & 0x8000) && (resolution & 0x7fff) <= 2) {
4004 data = gst_type_find_peek (tf, len - 16, 8);
4005 for (n = 0; n < 4; n++) {
4006 if (GST_READ_UINT16_BE (data + n * 2) > 2)
4009 gst_type_find_suggest_simple (tf, GST_TYPE_FIND_POSSIBLE + 5,
4010 "image/x-degas", NULL);
4015 /*** generic typefind for streams that have some data at a specific position***/
4026 start_with_type_find (GstTypeFind * tf, gpointer private)
4028 GstTypeFindData *start_with = (GstTypeFindData *) private;
4031 GST_LOG ("trying to find mime type %s with the first %u bytes of data",
4032 gst_structure_get_name (gst_caps_get_structure (start_with->caps, 0)),
4034 data = gst_type_find_peek (tf, 0, start_with->size);
4035 if (data && memcmp (data, start_with->data, start_with->size) == 0) {
4036 gst_type_find_suggest (tf, start_with->probability, start_with->caps);
4041 sw_data_destroy (GstTypeFindData * sw_data)
4043 if (G_LIKELY (sw_data->caps != NULL))
4044 gst_caps_unref (sw_data->caps);
4048 #define TYPE_FIND_REGISTER_START_WITH(plugin,name,rank,ext,_data,_size,_probability)\
4050 GstTypeFindData *sw_data = g_new (GstTypeFindData, 1); \
4051 sw_data->data = (const guint8 *)_data; \
4052 sw_data->size = _size; \
4053 sw_data->probability = _probability; \
4054 sw_data->caps = gst_caps_new_simple (name, NULL); \
4055 if (!gst_type_find_register (plugin, name, rank, start_with_type_find,\
4056 (char **) ext, sw_data->caps, sw_data, \
4057 (GDestroyNotify) (sw_data_destroy))) { \
4058 gst_caps_unref (sw_data->caps); \
4063 /*** same for riff types ***/
4066 riff_type_find (GstTypeFind * tf, gpointer private)
4068 GstTypeFindData *riff_data = (GstTypeFindData *) private;
4069 guint8 *data = gst_type_find_peek (tf, 0, 12);
4071 if (data && (memcmp (data, "RIFF", 4) == 0 || memcmp (data, "AVF0", 4) == 0)) {
4073 if (memcmp (data, riff_data->data, 4) == 0)
4074 gst_type_find_suggest (tf, riff_data->probability, riff_data->caps);
4078 #define TYPE_FIND_REGISTER_RIFF(plugin,name,rank,ext,_data) \
4080 GstTypeFindData *sw_data = g_new (GstTypeFindData, 1); \
4081 sw_data->data = (gpointer)_data; \
4082 sw_data->size = 4; \
4083 sw_data->probability = GST_TYPE_FIND_MAXIMUM; \
4084 sw_data->caps = gst_caps_new_simple (name, NULL); \
4085 if (!gst_type_find_register (plugin, name, rank, riff_type_find, \
4086 (char **) ext, sw_data->caps, sw_data, \
4087 (GDestroyNotify) (sw_data_destroy))) { \
4088 gst_caps_unref (sw_data->caps); \
4094 /*** plugin initialization ***/
4096 #define TYPE_FIND_REGISTER(plugin,name,rank,func,ext,caps,priv,notify) \
4098 if (!gst_type_find_register (plugin, name, rank, func, (char **) ext, caps, priv, notify))\
4104 plugin_init (GstPlugin * plugin)
4106 /* can't initialize this via a struct as caps can't be statically initialized */
4108 /* note: asx/wax/wmx are XML files, asf doesn't handle them */
4109 /* FIXME-0.11: these should be const,
4110 this requires gstreamer/gst/gsttypefind::gst_type_find_register()
4111 to have define the parameter as const
4113 static const gchar *asf_exts[] = { "asf", "wm", "wma", "wmv", NULL };
4114 static const gchar *au_exts[] = { "au", "snd", NULL };
4115 static const gchar *avi_exts[] = { "avi", NULL };
4116 static const gchar *qcp_exts[] = { "qcp", NULL };
4117 static const gchar *cdxa_exts[] = { "dat", NULL };
4118 static const gchar *flac_exts[] = { "flac", NULL };
4119 static const gchar *flx_exts[] = { "flc", "fli", NULL };
4120 static const gchar *id3_exts[] =
4121 { "mp3", "mp2", "mp1", "mpga", "ogg", "flac", "tta", NULL };
4122 static const gchar *apetag_exts[] = { "mp3", "ape", "mpc", "wv", NULL };
4123 static const gchar *tta_exts[] = { "tta", NULL };
4124 static const gchar *mod_exts[] = { "669", "amf", "dsm", "gdm", "far", "imf",
4125 "it", "med", "mod", "mtm", "okt", "sam",
4126 "s3m", "stm", "stx", "ult", "xm", NULL
4128 static const gchar *mp3_exts[] = { "mp3", "mp2", "mp1", "mpga", NULL };
4129 static const gchar *ac3_exts[] = { "ac3", "eac3", NULL };
4130 static const gchar *dts_exts[] = { "dts", NULL };
4131 static const gchar *gsm_exts[] = { "gsm", NULL };
4132 static const gchar *musepack_exts[] = { "mpc", "mpp", "mp+", NULL };
4133 static const gchar *mpeg_sys_exts[] = { "mpe", "mpeg", "mpg", NULL };
4134 static const gchar *mpeg_video_exts[] = { "mpv", "mpeg", "mpg", NULL };
4135 static const gchar *mpeg_ts_exts[] = { "ts", "mts", NULL };
4136 static const gchar *ogg_exts[] = { "anx", "ogg", "ogm", NULL };
4137 static const gchar *qt_exts[] = { "mov", NULL };
4138 static const gchar *qtif_exts[] = { "qif", "qtif", "qti", NULL };
4139 static const gchar *mj2_exts[] = { "mj2", NULL };
4140 static const gchar *jp2_exts[] = { "jp2", NULL };
4141 static const gchar *rm_exts[] = { "ra", "ram", "rm", "rmvb", NULL };
4142 static const gchar *swf_exts[] = { "swf", "swfl", NULL };
4143 static const gchar *utf8_exts[] = { "txt", NULL };
4144 static const gchar *wav_exts[] = { "wav", NULL };
4145 static const gchar *aiff_exts[] = { "aiff", "aif", "aifc", NULL };
4146 static const gchar *svx_exts[] = { "iff", "svx", NULL };
4147 static const gchar *paris_exts[] = { "paf", NULL };
4148 static const gchar *nist_exts[] = { "nist", NULL };
4149 static const gchar *voc_exts[] = { "voc", NULL };
4150 static const gchar *sds_exts[] = { "sds", NULL };
4151 static const gchar *ircam_exts[] = { "sf", NULL };
4152 static const gchar *w64_exts[] = { "w64", NULL };
4153 static const gchar *shn_exts[] = { "shn", NULL };
4154 static const gchar *ape_exts[] = { "ape", NULL };
4155 static const gchar *uri_exts[] = { "ram", NULL };
4156 static const gchar *sdp_exts[] = { "sdp", NULL };
4157 static const gchar *smil_exts[] = { "smil", NULL };
4158 static const gchar *html_exts[] = { "htm", "html", NULL };
4159 static const gchar *xml_exts[] = { "xml", NULL };
4160 static const gchar *jpeg_exts[] = { "jpg", "jpe", "jpeg", NULL };
4161 static const gchar *gif_exts[] = { "gif", NULL };
4162 static const gchar *png_exts[] = { "png", NULL };
4163 static const gchar *bmp_exts[] = { "bmp", NULL };
4164 static const gchar *tiff_exts[] = { "tif", "tiff", NULL };
4165 static const gchar *matroska_exts[] = { "mkv", "mka", NULL };
4166 static const gchar *webm_exts[] = { "webm", NULL };
4167 static const gchar *mve_exts[] = { "mve", NULL };
4168 static const gchar *dv_exts[] = { "dv", "dif", NULL };
4169 static const gchar *amr_exts[] = { "amr", NULL };
4170 static const gchar *ilbc_exts[] = { "ilbc", NULL };
4171 static const gchar *sid_exts[] = { "sid", NULL };
4172 static const gchar *xcf_exts[] = { "xcf", NULL };
4173 static const gchar *mng_exts[] = { "mng", NULL };
4174 static const gchar *jng_exts[] = { "jng", NULL };
4175 static const gchar *xpm_exts[] = { "xpm", NULL };
4176 static const gchar *pnm_exts[] = { "pnm", "ppm", "pgm", "pbm", NULL };
4177 static const gchar *ras_exts[] = { "ras", NULL };
4178 static const gchar *bz2_exts[] = { "bz2", NULL };
4179 static const gchar *gz_exts[] = { "gz", NULL };
4180 static const gchar *zip_exts[] = { "zip", NULL };
4181 static const gchar *compress_exts[] = { "Z", NULL };
4182 static const gchar *m4a_exts[] = { "m4a", NULL };
4183 static const gchar *q3gp_exts[] = { "3gp", NULL };
4184 static const gchar *aac_exts[] = { "aac", "adts", "adif", "loas", NULL };
4185 static const gchar *spc_exts[] = { "spc", NULL };
4186 static const gchar *wavpack_exts[] = { "wv", "wvp", NULL };
4187 static const gchar *wavpack_correction_exts[] = { "wvc", NULL };
4188 static const gchar *rar_exts[] = { "rar", NULL };
4189 static const gchar *tar_exts[] = { "tar", NULL };
4190 static const gchar *ar_exts[] = { "a", NULL };
4191 static const gchar *msdos_exts[] = { "dll", "exe", "ocx", "sys", "scr",
4192 "msstyles", "cpl", NULL
4194 static const gchar *flv_exts[] = { "flv", NULL };
4195 static const gchar *m4v_exts[] = { "m4v", NULL };
4196 static const gchar *h263_exts[] = { "h263", "263", NULL };
4197 static const gchar *h264_exts[] = { "h264", "x264", "264", NULL };
4198 static const gchar *nuv_exts[] = { "nuv", NULL };
4199 static const gchar *vivo_exts[] = { "viv", NULL };
4200 static const gchar *nsf_exts[] = { "nsf", NULL };
4201 static const gchar *gym_exts[] = { "gym", NULL };
4202 static const gchar *ay_exts[] = { "ay", NULL };
4203 static const gchar *gbs_exts[] = { "gbs", NULL };
4204 static const gchar *kss_exts[] = { "kss", NULL };
4205 static const gchar *sap_exts[] = { "sap", NULL };
4206 static const gchar *vgm_exts[] = { "vgm", NULL };
4207 static const gchar *mid_exts[] = { "mid", "midi", NULL };
4208 static const gchar *mxmf_exts[] = { "mxmf", NULL };
4209 static const gchar *imelody_exts[] = { "imy", "ime", "imelody", NULL };
4210 static const gchar *pdf_exts[] = { "pdf", NULL };
4211 static const gchar *ps_exts[] = { "ps", NULL };
4212 static const gchar *svg_exts[] = { "svg", NULL };
4213 static const gchar *mxf_exts[] = { "mxf", NULL };
4214 static const gchar *ivf_exts[] = { "ivf", NULL };
4215 static const gchar *msword_exts[] = { "doc", NULL };
4216 static const gchar *dsstore_exts[] = { "DS_Store", NULL };
4217 static const gchar *psd_exts[] = { "psd", NULL };
4218 static const gchar *y4m_exts[] = { "y4m", NULL };
4220 GST_DEBUG_CATEGORY_INIT (type_find_debug, "typefindfunctions",
4221 GST_DEBUG_FG_GREEN | GST_DEBUG_BG_RED, "generic type find functions");
4223 /* must use strings, macros don't accept initializers */
4224 TYPE_FIND_REGISTER_START_WITH (plugin, "video/x-ms-asf", GST_RANK_SECONDARY,
4226 "\060\046\262\165\216\146\317\021\246\331\000\252\000\142\316\154", 16,
4227 GST_TYPE_FIND_MAXIMUM);
4228 TYPE_FIND_REGISTER (plugin, "audio/x-musepack", GST_RANK_PRIMARY,
4229 musepack_type_find, musepack_exts, MUSEPACK_CAPS, NULL, NULL);
4230 TYPE_FIND_REGISTER (plugin, "audio/x-au", GST_RANK_MARGINAL,
4231 au_type_find, au_exts, AU_CAPS, NULL, NULL);
4232 TYPE_FIND_REGISTER_RIFF (plugin, "video/x-msvideo", GST_RANK_PRIMARY,
4234 TYPE_FIND_REGISTER_RIFF (plugin, "audio/qcelp", GST_RANK_PRIMARY,
4236 TYPE_FIND_REGISTER_RIFF (plugin, "video/x-cdxa", GST_RANK_PRIMARY,
4238 TYPE_FIND_REGISTER_START_WITH (plugin, "video/x-vcd", GST_RANK_PRIMARY,
4239 cdxa_exts, "\000\377\377\377\377\377\377\377\377\377\377\000", 12,
4240 GST_TYPE_FIND_MAXIMUM);
4241 TYPE_FIND_REGISTER_START_WITH (plugin, "audio/x-imelody", GST_RANK_PRIMARY,
4242 imelody_exts, "BEGIN:IMELODY", 13, GST_TYPE_FIND_MAXIMUM);
4244 TYPE_FIND_REGISTER_START_WITH (plugin, "video/x-smoke", GST_RANK_PRIMARY,
4245 NULL, "\x80smoke\x00\x01\x00", 6, GST_TYPE_FIND_MAXIMUM);
4247 TYPE_FIND_REGISTER (plugin, "audio/midi", GST_RANK_PRIMARY, mid_type_find,
4248 mid_exts, MID_CAPS, NULL, NULL);
4249 TYPE_FIND_REGISTER_RIFF (plugin, "audio/riff-midi", GST_RANK_PRIMARY,
4251 TYPE_FIND_REGISTER (plugin, "audio/mobile-xmf", GST_RANK_PRIMARY,
4252 mxmf_type_find, mxmf_exts, MXMF_CAPS, NULL, NULL);
4253 TYPE_FIND_REGISTER (plugin, "video/x-fli", GST_RANK_MARGINAL, flx_type_find,
4254 flx_exts, FLX_CAPS, NULL, NULL);
4255 TYPE_FIND_REGISTER (plugin, "application/x-id3v2", GST_RANK_PRIMARY + 103,
4256 id3v2_type_find, id3_exts, ID3_CAPS, NULL, NULL);
4257 TYPE_FIND_REGISTER (plugin, "application/x-id3v1", GST_RANK_PRIMARY + 101,
4258 id3v1_type_find, id3_exts, ID3_CAPS, NULL, NULL);
4259 TYPE_FIND_REGISTER (plugin, "application/x-apetag", GST_RANK_PRIMARY + 102,
4260 apetag_type_find, apetag_exts, APETAG_CAPS, NULL, NULL);
4261 TYPE_FIND_REGISTER (plugin, "audio/x-ttafile", GST_RANK_PRIMARY,
4262 tta_type_find, tta_exts, TTA_CAPS, NULL, NULL);
4263 TYPE_FIND_REGISTER (plugin, "audio/x-mod", GST_RANK_SECONDARY, mod_type_find,
4264 mod_exts, MOD_CAPS, NULL, NULL);
4265 TYPE_FIND_REGISTER (plugin, "audio/mpeg", GST_RANK_PRIMARY, mp3_type_find,
4266 mp3_exts, MP3_CAPS, NULL, NULL);
4267 TYPE_FIND_REGISTER (plugin, "audio/x-ac3", GST_RANK_PRIMARY, ac3_type_find,
4268 ac3_exts, AC3_CAPS, NULL, NULL);
4269 TYPE_FIND_REGISTER (plugin, "audio/x-dts", GST_RANK_SECONDARY, dts_type_find,
4270 dts_exts, DTS_CAPS, NULL, NULL);
4271 TYPE_FIND_REGISTER (plugin, "audio/x-gsm", GST_RANK_PRIMARY, NULL, gsm_exts,
4272 GSM_CAPS, NULL, NULL);
4273 TYPE_FIND_REGISTER (plugin, "video/mpeg-sys", GST_RANK_PRIMARY,
4274 mpeg_sys_type_find, mpeg_sys_exts, MPEG_SYS_CAPS, NULL, NULL);
4275 TYPE_FIND_REGISTER (plugin, "video/mpegts", GST_RANK_PRIMARY,
4276 mpeg_ts_type_find, mpeg_ts_exts, MPEGTS_CAPS, NULL, NULL);
4277 TYPE_FIND_REGISTER (plugin, "application/ogg", GST_RANK_PRIMARY,
4278 ogganx_type_find, ogg_exts, OGGANX_CAPS, NULL, NULL);
4279 TYPE_FIND_REGISTER (plugin, "video/mpeg-elementary", GST_RANK_MARGINAL,
4280 mpeg_video_stream_type_find, mpeg_video_exts, MPEG_VIDEO_CAPS, NULL,
4282 TYPE_FIND_REGISTER (plugin, "video/mpeg4", GST_RANK_PRIMARY,
4283 mpeg4_video_type_find, m4v_exts, MPEG_VIDEO_CAPS, NULL, NULL);
4284 TYPE_FIND_REGISTER (plugin, "video/x-h263", GST_RANK_SECONDARY,
4285 h263_video_type_find, h263_exts, H263_VIDEO_CAPS, NULL, NULL);
4286 TYPE_FIND_REGISTER (plugin, "video/x-h264", GST_RANK_PRIMARY,
4287 h264_video_type_find, h264_exts, H264_VIDEO_CAPS, NULL, NULL);
4288 TYPE_FIND_REGISTER (plugin, "video/x-nuv", GST_RANK_SECONDARY, nuv_type_find,
4289 nuv_exts, NUV_CAPS, NULL, NULL);
4292 TYPE_FIND_REGISTER (plugin, "audio/x-m4a", GST_RANK_PRIMARY, m4a_type_find,
4293 m4a_exts, M4A_CAPS, NULL, NULL);
4294 TYPE_FIND_REGISTER (plugin, "application/x-3gp", GST_RANK_PRIMARY,
4295 q3gp_type_find, q3gp_exts, Q3GP_CAPS, NULL, NULL);
4296 TYPE_FIND_REGISTER (plugin, "video/quicktime", GST_RANK_SECONDARY,
4297 qt_type_find, qt_exts, QT_CAPS, NULL, NULL);
4298 TYPE_FIND_REGISTER (plugin, "image/x-quicktime", GST_RANK_SECONDARY,
4299 qtif_type_find, qtif_exts, QTIF_CAPS, NULL, NULL);
4300 TYPE_FIND_REGISTER (plugin, "image/jp2", GST_RANK_PRIMARY,
4301 jp2_type_find, jp2_exts, JP2_CAPS, NULL, NULL);
4302 TYPE_FIND_REGISTER (plugin, "video/mj2", GST_RANK_PRIMARY,
4303 jp2_type_find, mj2_exts, MJ2_CAPS, NULL, NULL);
4305 TYPE_FIND_REGISTER (plugin, "text/html", GST_RANK_SECONDARY, html_type_find,
4306 html_exts, HTML_CAPS, NULL, NULL);
4307 TYPE_FIND_REGISTER_START_WITH (plugin, "application/vnd.rn-realmedia",
4308 GST_RANK_SECONDARY, rm_exts, ".RMF", 4, GST_TYPE_FIND_MAXIMUM);
4309 TYPE_FIND_REGISTER_START_WITH (plugin, "application/x-pn-realaudio",
4310 GST_RANK_SECONDARY, rm_exts, ".ra\375", 4, GST_TYPE_FIND_MAXIMUM);
4311 TYPE_FIND_REGISTER (plugin, "application/x-shockwave-flash",
4312 GST_RANK_SECONDARY, swf_type_find, swf_exts, SWF_CAPS, NULL, NULL);
4313 TYPE_FIND_REGISTER_START_WITH (plugin, "video/x-flv", GST_RANK_SECONDARY,
4314 flv_exts, "FLV", 3, GST_TYPE_FIND_MAXIMUM);
4315 TYPE_FIND_REGISTER (plugin, "text/plain", GST_RANK_MARGINAL, utf8_type_find,
4316 utf8_exts, UTF8_CAPS, NULL, NULL);
4317 TYPE_FIND_REGISTER (plugin, "text/uri-list", GST_RANK_MARGINAL, uri_type_find,
4318 uri_exts, URI_CAPS, NULL, NULL);
4319 TYPE_FIND_REGISTER (plugin, "application/sdp", GST_RANK_SECONDARY,
4320 sdp_type_find, sdp_exts, SDP_CAPS, NULL, NULL);
4321 TYPE_FIND_REGISTER (plugin, "application/smil", GST_RANK_SECONDARY,
4322 smil_type_find, smil_exts, SMIL_CAPS, NULL, NULL);
4323 TYPE_FIND_REGISTER (plugin, "application/xml", GST_RANK_MARGINAL,
4324 xml_type_find, xml_exts, GENERIC_XML_CAPS, NULL, NULL);
4325 TYPE_FIND_REGISTER_RIFF (plugin, "audio/x-wav", GST_RANK_PRIMARY, wav_exts,
4327 TYPE_FIND_REGISTER (plugin, "audio/x-aiff", GST_RANK_SECONDARY,
4328 aiff_type_find, aiff_exts, AIFF_CAPS, NULL, NULL);
4329 TYPE_FIND_REGISTER (plugin, "audio/x-svx", GST_RANK_SECONDARY, svx_type_find,
4330 svx_exts, SVX_CAPS, NULL, NULL);
4331 TYPE_FIND_REGISTER (plugin, "audio/x-paris", GST_RANK_SECONDARY,
4332 paris_type_find, paris_exts, PARIS_CAPS, NULL, NULL);
4333 TYPE_FIND_REGISTER_START_WITH (plugin, "audio/x-nist", GST_RANK_SECONDARY,
4334 nist_exts, "NIST", 4, GST_TYPE_FIND_MAXIMUM);
4335 TYPE_FIND_REGISTER_START_WITH (plugin, "audio/x-voc", GST_RANK_SECONDARY,
4336 voc_exts, "Creative", 8, GST_TYPE_FIND_MAXIMUM);
4337 TYPE_FIND_REGISTER (plugin, "audio/x-sds", GST_RANK_SECONDARY, sds_type_find,
4338 sds_exts, SDS_CAPS, NULL, NULL);
4339 TYPE_FIND_REGISTER (plugin, "audio/x-ircam", GST_RANK_SECONDARY,
4340 ircam_type_find, ircam_exts, IRCAM_CAPS, NULL, NULL);
4341 TYPE_FIND_REGISTER_START_WITH (plugin, "audio/x-w64", GST_RANK_SECONDARY,
4342 w64_exts, "riff", 4, GST_TYPE_FIND_MAXIMUM);
4343 TYPE_FIND_REGISTER (plugin, "audio/x-shorten", GST_RANK_SECONDARY,
4344 shn_type_find, shn_exts, SHN_CAPS, NULL, NULL);
4345 TYPE_FIND_REGISTER (plugin, "application/x-ape", GST_RANK_SECONDARY,
4346 ape_type_find, ape_exts, APE_CAPS, NULL, NULL);
4347 TYPE_FIND_REGISTER (plugin, "image/jpeg", GST_RANK_PRIMARY + 15,
4348 jpeg_type_find, jpeg_exts, JPEG_CAPS, NULL, NULL);
4349 TYPE_FIND_REGISTER_START_WITH (plugin, "image/gif", GST_RANK_PRIMARY,
4350 gif_exts, "GIF8", 4, GST_TYPE_FIND_MAXIMUM);
4351 TYPE_FIND_REGISTER_START_WITH (plugin, "image/png", GST_RANK_PRIMARY + 14,
4352 png_exts, "\211PNG\015\012\032\012", 8, GST_TYPE_FIND_MAXIMUM);
4353 TYPE_FIND_REGISTER (plugin, "image/bmp", GST_RANK_PRIMARY, bmp_type_find,
4354 bmp_exts, BMP_CAPS, NULL, NULL);
4355 TYPE_FIND_REGISTER (plugin, "image/tiff", GST_RANK_PRIMARY, tiff_type_find,
4356 tiff_exts, TIFF_CAPS, NULL, NULL);
4357 TYPE_FIND_REGISTER (plugin, "image/x-portable-pixmap", GST_RANK_SECONDARY,
4358 pnm_type_find, pnm_exts, PNM_CAPS, NULL, NULL);
4359 TYPE_FIND_REGISTER (plugin, "video/x-matroska", GST_RANK_PRIMARY,
4360 matroska_type_find, matroska_exts, MATROSKA_CAPS, NULL, NULL);
4361 TYPE_FIND_REGISTER (plugin, "video/webm", GST_RANK_PRIMARY,
4362 webm_type_find, webm_exts, WEBM_CAPS, NULL, NULL);
4363 TYPE_FIND_REGISTER (plugin, "application/mxf", GST_RANK_PRIMARY,
4364 mxf_type_find, mxf_exts, MXF_CAPS, NULL, NULL);
4365 TYPE_FIND_REGISTER_START_WITH (plugin, "video/x-mve", GST_RANK_SECONDARY,
4366 mve_exts, "Interplay MVE File\032\000\032\000\000\001\063\021", 26,
4367 GST_TYPE_FIND_MAXIMUM);
4368 TYPE_FIND_REGISTER (plugin, "video/x-dv", GST_RANK_SECONDARY, dv_type_find,
4369 dv_exts, DV_CAPS, NULL, NULL);
4370 TYPE_FIND_REGISTER_START_WITH (plugin, "audio/x-amr-nb-sh", GST_RANK_PRIMARY,
4371 amr_exts, "#!AMR", 5, GST_TYPE_FIND_LIKELY);
4372 TYPE_FIND_REGISTER_START_WITH (plugin, "audio/x-amr-wb-sh", GST_RANK_PRIMARY,
4373 amr_exts, "#!AMR-WB", 7, GST_TYPE_FIND_MAXIMUM);
4374 TYPE_FIND_REGISTER (plugin, "audio/iLBC-sh", GST_RANK_PRIMARY,
4375 ilbc_type_find, ilbc_exts, ILBC_CAPS, NULL, NULL);
4376 TYPE_FIND_REGISTER_START_WITH (plugin, "audio/x-sid", GST_RANK_MARGINAL,
4377 sid_exts, "PSID", 4, GST_TYPE_FIND_MAXIMUM);
4378 TYPE_FIND_REGISTER_START_WITH (plugin, "image/x-xcf", GST_RANK_SECONDARY,
4379 xcf_exts, "gimp xcf", 8, GST_TYPE_FIND_MAXIMUM);
4380 TYPE_FIND_REGISTER_START_WITH (plugin, "video/x-mng", GST_RANK_SECONDARY,
4381 mng_exts, "\212MNG\015\012\032\012", 8, GST_TYPE_FIND_MAXIMUM);
4382 TYPE_FIND_REGISTER_START_WITH (plugin, "image/x-jng", GST_RANK_SECONDARY,
4383 jng_exts, "\213JNG\015\012\032\012", 8, GST_TYPE_FIND_MAXIMUM);
4384 TYPE_FIND_REGISTER_START_WITH (plugin, "image/x-xpixmap", GST_RANK_SECONDARY,
4385 xpm_exts, "/* XPM */", 9, GST_TYPE_FIND_MAXIMUM);
4386 TYPE_FIND_REGISTER_START_WITH (plugin, "image/x-sun-raster",
4387 GST_RANK_SECONDARY, ras_exts, "\131\246\152\225", 4,
4388 GST_TYPE_FIND_MAXIMUM);
4389 TYPE_FIND_REGISTER_START_WITH (plugin, "application/x-bzip",
4390 GST_RANK_SECONDARY, bz2_exts, "BZh", 3, GST_TYPE_FIND_LIKELY);
4391 TYPE_FIND_REGISTER_START_WITH (plugin, "application/x-gzip",
4392 GST_RANK_SECONDARY, gz_exts, "\037\213", 2, GST_TYPE_FIND_LIKELY);
4393 TYPE_FIND_REGISTER_START_WITH (plugin, "application/zip", GST_RANK_SECONDARY,
4394 zip_exts, "PK\003\004", 4, GST_TYPE_FIND_LIKELY);
4395 TYPE_FIND_REGISTER_START_WITH (plugin, "application/x-compress",
4396 GST_RANK_SECONDARY, compress_exts, "\037\235", 2, GST_TYPE_FIND_LIKELY);
4397 TYPE_FIND_REGISTER (plugin, "subtitle/x-kate", GST_RANK_MARGINAL,
4398 kate_type_find, NULL, NULL, NULL, NULL);
4399 TYPE_FIND_REGISTER (plugin, "audio/x-flac", GST_RANK_PRIMARY,
4400 flac_type_find, flac_exts, FLAC_CAPS, NULL, NULL);
4401 TYPE_FIND_REGISTER (plugin, "audio/x-vorbis", GST_RANK_PRIMARY,
4402 vorbis_type_find, NULL, VORBIS_CAPS, NULL, NULL);
4403 TYPE_FIND_REGISTER (plugin, "video/x-theora", GST_RANK_PRIMARY,
4404 theora_type_find, NULL, THEORA_CAPS, NULL, NULL);
4405 TYPE_FIND_REGISTER (plugin, "application/x-ogm-video", GST_RANK_PRIMARY,
4406 ogmvideo_type_find, NULL, OGMVIDEO_CAPS, NULL, NULL);
4407 TYPE_FIND_REGISTER (plugin, "application/x-ogm-audio", GST_RANK_PRIMARY,
4408 ogmaudio_type_find, NULL, OGMAUDIO_CAPS, NULL, NULL);
4409 TYPE_FIND_REGISTER (plugin, "application/x-ogm-text", GST_RANK_PRIMARY,
4410 ogmtext_type_find, NULL, OGMTEXT_CAPS, NULL, NULL);
4411 TYPE_FIND_REGISTER (plugin, "audio/x-speex", GST_RANK_PRIMARY,
4412 speex_type_find, NULL, SPEEX_CAPS, NULL, NULL);
4413 TYPE_FIND_REGISTER (plugin, "audio/x-celt", GST_RANK_PRIMARY,
4414 celt_type_find, NULL, CELT_CAPS, NULL, NULL);
4415 TYPE_FIND_REGISTER (plugin, "application/x-ogg-skeleton", GST_RANK_PRIMARY,
4416 oggskel_type_find, NULL, OGG_SKELETON_CAPS, NULL, NULL);
4417 TYPE_FIND_REGISTER (plugin, "text/x-cmml", GST_RANK_PRIMARY, cmml_type_find,
4418 NULL, CMML_CAPS, NULL, NULL);
4419 TYPE_FIND_REGISTER_START_WITH (plugin, "application/x-executable",
4420 GST_RANK_MARGINAL, NULL, "\177ELF", 4, GST_TYPE_FIND_MAXIMUM);
4421 TYPE_FIND_REGISTER (plugin, "audio/aac", GST_RANK_SECONDARY,
4422 aac_type_find, aac_exts, AAC_CAPS, NULL, NULL);
4423 TYPE_FIND_REGISTER_START_WITH (plugin, "audio/x-spc", GST_RANK_SECONDARY,
4424 spc_exts, "SNES-SPC700 Sound File Data", 27, GST_TYPE_FIND_MAXIMUM);
4425 TYPE_FIND_REGISTER (plugin, "audio/x-wavpack", GST_RANK_SECONDARY,
4426 wavpack_type_find, wavpack_exts, WAVPACK_CAPS, NULL, NULL);
4427 TYPE_FIND_REGISTER (plugin, "audio/x-wavpack-correction", GST_RANK_SECONDARY,
4428 wavpack_type_find, wavpack_correction_exts, WAVPACK_CORRECTION_CAPS, NULL,
4430 TYPE_FIND_REGISTER (plugin, "application/postscript", GST_RANK_SECONDARY,
4431 postscript_type_find, ps_exts, POSTSCRIPT_CAPS, NULL, NULL);
4432 TYPE_FIND_REGISTER (plugin, "image/svg+xml", GST_RANK_SECONDARY,
4433 svg_type_find, svg_exts, SVG_CAPS, NULL, NULL);
4434 TYPE_FIND_REGISTER_START_WITH (plugin, "application/x-rar",
4435 GST_RANK_SECONDARY, rar_exts, "Rar!", 4, GST_TYPE_FIND_LIKELY);
4436 TYPE_FIND_REGISTER (plugin, "application/x-tar", GST_RANK_SECONDARY,
4437 tar_type_find, tar_exts, TAR_CAPS, NULL, NULL);
4438 TYPE_FIND_REGISTER (plugin, "application/x-ar", GST_RANK_SECONDARY,
4439 ar_type_find, ar_exts, AR_CAPS, NULL, NULL);
4440 TYPE_FIND_REGISTER (plugin, "application/x-ms-dos-executable",
4441 GST_RANK_SECONDARY, msdos_type_find, msdos_exts, MSDOS_CAPS, NULL, NULL);
4442 TYPE_FIND_REGISTER (plugin, "video/x-dirac", GST_RANK_PRIMARY,
4443 dirac_type_find, NULL, DIRAC_CAPS, NULL, NULL);
4444 TYPE_FIND_REGISTER (plugin, "multipart/x-mixed-replace", GST_RANK_SECONDARY,
4445 multipart_type_find, NULL, MULTIPART_CAPS, NULL, NULL);
4446 TYPE_FIND_REGISTER (plugin, "application/x-mmsh", GST_RANK_SECONDARY,
4447 mmsh_type_find, NULL, MMSH_CAPS, NULL, NULL);
4448 TYPE_FIND_REGISTER (plugin, "video/vivo", GST_RANK_SECONDARY,
4449 vivo_type_find, vivo_exts, VIVO_CAPS, NULL, NULL);
4450 TYPE_FIND_REGISTER_START_WITH (plugin, "audio/x-nsf",
4451 GST_RANK_SECONDARY, nsf_exts, "NESM\x1a", 5, GST_TYPE_FIND_MAXIMUM);
4452 TYPE_FIND_REGISTER_START_WITH (plugin, "audio/x-gym",
4453 GST_RANK_SECONDARY, gym_exts, "GYMX", 4, GST_TYPE_FIND_MAXIMUM);
4454 TYPE_FIND_REGISTER_START_WITH (plugin, "audio/x-ay",
4455 GST_RANK_SECONDARY, ay_exts, "ZXAYEMUL", 8, GST_TYPE_FIND_MAXIMUM);
4456 TYPE_FIND_REGISTER_START_WITH (plugin, "audio/x-gbs",
4457 GST_RANK_SECONDARY, gbs_exts, "GBS\x01", 4, GST_TYPE_FIND_MAXIMUM);
4458 TYPE_FIND_REGISTER_START_WITH (plugin, "audio/x-vgm",
4459 GST_RANK_SECONDARY, vgm_exts, "Vgm\x20", 4, GST_TYPE_FIND_MAXIMUM);
4460 TYPE_FIND_REGISTER_START_WITH (plugin, "audio/x-sap",
4461 GST_RANK_SECONDARY, sap_exts, "SAP\x0d\x0aAUTHOR\x20", 12,
4462 GST_TYPE_FIND_MAXIMUM);
4463 TYPE_FIND_REGISTER_START_WITH (plugin, "video/x-ivf", GST_RANK_SECONDARY,
4464 ivf_exts, "DKIF", 4, GST_TYPE_FIND_NEARLY_CERTAIN);
4465 TYPE_FIND_REGISTER_START_WITH (plugin, "audio/x-kss", GST_RANK_SECONDARY,
4466 kss_exts, "KSSX\0", 5, GST_TYPE_FIND_MAXIMUM);
4467 TYPE_FIND_REGISTER_START_WITH (plugin, "application/pdf", GST_RANK_SECONDARY,
4468 pdf_exts, "%PDF-", 5, GST_TYPE_FIND_LIKELY);
4469 TYPE_FIND_REGISTER_START_WITH (plugin, "application/msword",
4470 GST_RANK_SECONDARY, msword_exts, "\320\317\021\340\241\261\032\341", 8,
4471 GST_TYPE_FIND_LIKELY);
4472 /* Mac OS X .DS_Store files tend to be taken for video/mpeg */
4473 TYPE_FIND_REGISTER_START_WITH (plugin, "application/octet-stream",
4474 GST_RANK_SECONDARY, dsstore_exts, "\000\000\000\001Bud1", 8,
4475 GST_TYPE_FIND_LIKELY);
4476 TYPE_FIND_REGISTER_START_WITH (plugin, "image/vnd.adobe.photoshop",
4477 GST_RANK_SECONDARY, psd_exts, "8BPS\000\001\000\000\000\000", 10,
4478 GST_TYPE_FIND_LIKELY);
4479 TYPE_FIND_REGISTER_START_WITH (plugin, "application/x-yuv4mpeg",
4480 GST_RANK_SECONDARY, y4m_exts, "YUV4MPEG2 ", 10, GST_TYPE_FIND_LIKELY);
4481 TYPE_FIND_REGISTER (plugin, "image/x-icon", GST_RANK_MARGINAL,
4482 windows_icon_typefind, NULL, NULL, NULL, NULL);
4485 TYPE_FIND_REGISTER (plugin, "xdgmime-base", GST_RANK_MARGINAL,
4486 xdgmime_typefind, NULL, NULL, NULL, NULL);
4489 TYPE_FIND_REGISTER (plugin, "image/x-degas", GST_RANK_MARGINAL,
4490 degas_type_find, NULL, NULL, NULL, NULL);
4495 GST_PLUGIN_DEFINE (GST_VERSION_MAJOR,
4497 "typefindfunctions",
4498 "default typefind functions",
4499 plugin_init, VERSION, GST_LICENSE, GST_PACKAGE_NAME, GST_PACKAGE_ORIGIN)