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df3fa511a7
Original commit message from CVS: reviewed by David Schleef * configure.ac: bump required gstreamer version to 0.8.1.1 because of following changes [--ds] * gst-libs/gst/riff/riff-read.c: Include gst/gstutils.h. (gst_riff_peek_head, gst_riff_peek_list, gst_riff_read_list) (gst_riff_read_header): Use GST_READ_UINT* macros to access possibly unaligned memory. * gst/typefind/gsttypefindfunctions.c: Include gst/gstutils.h. (mp3_type_find): Use GST_READ_UINT* macros to access possibly unaligned memory. (mp3_type_find, mpeg1_parse_header, qt_type_find) (speex_type_find): Likewise * gst/tags/gstvorbistag.c: (ADVANCE): Likewise * gst/qtdemux/qtdemux.c: Include stdlib.h (needed by realloc). (QTDEMUX_GUINT32_GET, QTDEMUX_GUINT16_GET, QTDEMUX_FP32_GET) (QTDEMUX_FP16_GET, QTDEMUX_FOURCC_GET) (gst_qtdemux_loop_header, gst_qtdemux_loop_header) (qtdemux_node_dump_foreach, qtdemux_tree_get_child_by_type) (qtdemux_tree_get_sibling_by_type): Use GST_READ_UINT* macros to access possibly unaligned memory. * gst/mpegstream/gstmpegpacketize.c: (parse_generic, parse_chunk): Likewise. * gst/mpegstream/gstmpegdemux.c: (gst_mpeg_demux_parse_syshead) (gst_mpeg_demux_parse_packet, gst_mpeg_demux_parse_pes): Likewise. * gst/mpegaudioparse/gstmpegaudioparse.c: (gst_mp3parse_chain): Likewise. * gst/mpeg2sub/gstmpeg2subt.c: (GST_BUFFER_DATA) (gst_mpeg2subt_chain_subtitle): Likewise. * gst/mpeg1videoparse/gstmp1videoparse.c: (mp1videoparse_parse_seq) (gst_mp1videoparse_time_code, gst_mp1videoparse_real_chain): Likewise. * gst/mpeg1sys/buffer.c: (mpeg1mux_buffer_update_audio_info): Likewise. * gst/cdxaparse/gstcdxaparse.c: (gst_bytestream_peek_bytes): Likewise. * gst/asfdemux/gstasfdemux.c: (_read_var_length, _read_uint): Likewise.
1412 lines
46 KiB
C
1412 lines
46 KiB
C
/* GStreamer
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* Copyright (C) 2003 Benjamion Otte <in7y118@public.uni-hamburg.de>
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*
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* gsttypefindfunctions.c: collection of various typefind functions
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Library General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Library General Public License for more details.
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*
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* You should have received a copy of the GNU Library General Public
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* License along with this library; if not, write to the
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* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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* Boston, MA 02111-1307, USA.
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*/
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#ifdef HAVE_CONFIG_H
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#include "config.h"
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#endif
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#include <glib/gstrfuncs.h>
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#include <gst/gsttypefind.h>
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#include <gst/gstelement.h>
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#include <gst/gstversion.h>
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#include <gst/gstinfo.h>
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#include <gst/gstutils.h>
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#include <string.h>
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#include <ctype.h>
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GST_DEBUG_CATEGORY_STATIC (type_find_debug);
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#define GST_CAT_DEFAULT type_find_debug
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/*** text/plain ****************************************************************/
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static GstStaticCaps utf8_caps = GST_STATIC_CAPS ("text/plain");
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#define UTF8_CAPS gst_static_caps_get(&utf8_caps)
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static void
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utf8_type_find (GstTypeFind * tf, gpointer unused)
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{
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guint8 *data;
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/* randomly decided values */
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guint size = 1024; /* starting size */
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guint probability = 95; /* starting probability */
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guint step = 10; /* how much we reduce probability in each iteration */
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while (probability > step) {
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data = gst_type_find_peek (tf, 0, size);
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if (data) {
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gchar *end;
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gchar *start = (gchar *) data;
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if (g_utf8_validate (start, size, (const gchar **) &end) || (end - start + 4 > size)) { /* allow last char to be cut off */
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gst_type_find_suggest (tf, probability, UTF8_CAPS);
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}
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return;
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}
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size /= 2;
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probability -= step;
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}
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}
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/*** text/uri-list ************************************************************/
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static GstStaticCaps uri_caps = GST_STATIC_CAPS ("text/uri-list");
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#define URI_CAPS (gst_static_caps_get(&uri_caps))
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#define BUFFER_SIZE 16 /* If the string is < 16 bytes we're screwed */
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#define INC_BUFFER { \
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pos++; \
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if (pos == BUFFER_SIZE) { \
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pos = 0; \
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offset += BUFFER_SIZE; \
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data = gst_type_find_peek (tf, offset, BUFFER_SIZE); \
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if (data == NULL) return; \
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} else { \
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data++; \
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} \
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}
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static void
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uri_type_find (GstTypeFind * tf, gpointer unused)
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{
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guint8 *data = gst_type_find_peek (tf, 0, BUFFER_SIZE);
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guint pos = 0;
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guint offset = 0;
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if (data) {
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/* Search for # comment lines */
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while (*data == '#') {
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/* Goto end of line */
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while (*data != '\n') {
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INC_BUFFER;
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}
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INC_BUFFER;
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}
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if (!g_ascii_isalpha (*data)) {
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/* Had a non alpha char - can't be uri-list */
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return;
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}
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INC_BUFFER;
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while (g_ascii_isalnum (*data)) {
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INC_BUFFER;
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}
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if (*data != ':') {
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/* First non alpha char is not a : */
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return;
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}
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/* Get the next 2 bytes as well */
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data = gst_type_find_peek (tf, offset + pos, 3);
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if (data == NULL)
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return;
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if (data[1] != '/' && data[2] != '/') {
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return;
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}
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gst_type_find_suggest (tf, GST_TYPE_FIND_MAXIMUM, URI_CAPS);
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}
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}
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/*** video/x-fli **************************************************************/
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static GstStaticCaps flx_caps = GST_STATIC_CAPS ("video/x-fli");
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#define FLX_CAPS gst_static_caps_get(&flx_caps)
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static void
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flx_type_find (GstTypeFind * tf, gpointer unused)
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{
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guint8 *data = gst_type_find_peek (tf, 0, 134);
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if (data) {
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/* check magic and the frame type of the first frame */
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if ((data[4] == 0x11 || data[4] == 0x12 ||
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data[4] == 0x30 || data[4] == 0x44) &&
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data[5] == 0xaf &&
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((data[132] == 0x00 || data[132] == 0xfa) && data[133] == 0xf1)) {
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gst_type_find_suggest (tf, GST_TYPE_FIND_MAXIMUM, FLX_CAPS);
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}
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return;
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}
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data = gst_type_find_peek (tf, 0, 6);
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if (data) {
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/* check magic only */
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if ((data[4] == 0x11 || data[4] == 0x12 ||
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data[4] == 0x30 || data[4] == 0x44) && data[5] == 0xaf) {
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gst_type_find_suggest (tf, GST_TYPE_FIND_LIKELY, FLX_CAPS);
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}
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return;
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}
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}
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/*** application/x-id3 **************************************************************/
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static GstStaticCaps id3_caps = GST_STATIC_CAPS ("application/x-id3");
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#define ID3_CAPS gst_static_caps_get(&id3_caps)
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static void
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id3_type_find (GstTypeFind * tf, gpointer unused)
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{
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/* detect ID3v2 first */
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guint8 *data = gst_type_find_peek (tf, 0, 10);
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if (data) {
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/* detect valid header */
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if (memcmp (data, "ID3", 3) == 0 &&
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data[3] != 0xFF && data[4] != 0xFF &&
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(data[6] & 0x80) == 0 && (data[7] & 0x80) == 0 &&
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(data[8] & 0x80) == 0 && (data[9] & 0x80) == 0) {
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gst_type_find_suggest (tf, GST_TYPE_FIND_MAXIMUM, ID3_CAPS);
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return;
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}
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}
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data = gst_type_find_peek (tf, -128, 3);
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if (data && memcmp (data, "TAG", 3) == 0) {
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gst_type_find_suggest (tf, GST_TYPE_FIND_MAXIMUM, ID3_CAPS);
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}
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}
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/*** audio/mpeg **************************************************************/
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/**
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* The chance that random data is identified as a valid mp3 header is 63 / 2^18
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* (0.024%) per try. This makes the function for calculating false positives
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* 1 - (1 - ((63 / 2 ^18) ^ GST_MP3_TYPEFIND_MIN_HEADERS)) ^ buffersize)
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* This has the following probabilities of false positives:
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* datasize MIN_HEADERS
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* (bytes) 1 2 3 4
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* 4096 62.6% 0.02% 0% 0%
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* 16384 98% 0.09% 0% 0%
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* 1 MiB 100% 5.88% 0% 0%
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* 1 GiB 100% 100% 1.44% 0%
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* 1 TiB 100% 100% 100% 0.35%
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* This means that the current choice (3 headers by most of the time 4096 byte
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* buffers is pretty safe for now.
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*
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* The max. size of each frame is 1440 bytes, which means that for N frames to
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* be detected, we need 1440 * GST_MP3_TYPEFIND_MIN_HEADERS + 3 bytes of data.
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* Assuming we step into the stream right after the frame header, this
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* means we need 1440 * (GST_MP3_TYPEFIND_MIN_HEADERS + 1) - 1 + 3 bytes
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* of data (5762) to always detect any mp3.
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*/
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static guint mp3types_bitrates[2][3][16] =
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{ {{0, 32, 64, 96, 128, 160, 192, 224, 256, 288, 320, 352, 384, 416, 448,},
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{0, 32, 48, 56, 64, 80, 96, 112, 128, 160, 192, 224, 256, 320, 384,},
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{0, 32, 40, 48, 56, 64, 80, 96, 112, 128, 160, 192, 224, 256, 320,}},
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{{0, 32, 48, 56, 64, 80, 96, 112, 128, 144, 160, 176, 192, 224, 256,},
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{0, 8, 16, 24, 32, 40, 48, 56, 64, 80, 96, 112, 128, 144, 160,},
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{0, 8, 16, 24, 32, 40, 48, 56, 64, 80, 96, 112, 128, 144, 160,}},
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};
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static guint mp3types_freqs[3][3] = { {11025, 12000, 8000},
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{22050, 24000, 16000},
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{44100, 48000, 32000}
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};
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static inline guint
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mp3_type_frame_length_from_header (guint32 header, guint * put_layer,
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guint * put_channels, guint * put_bitrate, guint * put_samplerate)
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{
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guint bitrate, layer, length, mode, samplerate, version, channels;
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if ((header & 0xffe00000) != 0xffe00000)
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return 0;
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/* we don't need extension, copyright, original or
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* emphasis for the frame length */
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header >>= 6;
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/* mode */
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mode = header & 0x3;
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header >>= 3;
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/* padding */
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length = header & 0x1;
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header >>= 1;
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/* sampling frequency */
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samplerate = header & 0x3;
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if (samplerate == 3)
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return 0;
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header >>= 2;
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/* bitrate index */
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bitrate = header & 0xF;
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if (bitrate == 15 || bitrate == 0)
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return 0;
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/* ignore error correction, too */
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header >>= 5;
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/* layer */
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layer = 4 - (header & 0x3);
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if (layer == 4)
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return 0;
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header >>= 2;
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/* version 0=MPEG2.5; 2=MPEG2; 3=MPEG1 */
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version = header & 0x3;
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if (version == 1)
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return 0;
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/* lookup */
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channels = (mode == 3) ? 1 : 2;
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bitrate = mp3types_bitrates[version == 3 ? 0 : 1][layer - 1][bitrate];
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samplerate = mp3types_freqs[version > 0 ? version - 1 : 0][samplerate];
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/* calculating */
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if (layer == 1) {
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length = ((12000 * bitrate / samplerate) + length) * 4;
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} else {
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length += ((layer == 3
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&& version != 3) ? 72000 : 144000) * bitrate / samplerate;
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}
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GST_LOG ("mp3typefind: alculated mp3 frame length of %u bytes", length);
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GST_LOG
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("mp3typefind: samplerate = %u - bitrate = %u - layer = %u - version = %u"
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" - channels = %u", samplerate, bitrate, layer, version, channels);
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if (put_layer)
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*put_layer = layer;
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if (put_channels)
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*put_channels = channels;
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if (put_bitrate)
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*put_bitrate = bitrate;
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if (put_samplerate)
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*put_samplerate = samplerate;
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return length;
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}
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static GstStaticCaps mp3_caps = GST_STATIC_CAPS ("audio/mpeg, "
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"mpegversion = (int) 1, layer = (int) [ 1, 3 ]");
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#define MP3_CAPS (gst_static_caps_get(&mp3_caps))
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/*
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* random values for typefinding
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* if no more data is available, we will return a probability of
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* (found_headers/TRY_HEADERS) * (MAXIMUM * (TRY_SYNC - bytes_skipped)
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* / TRY_SYNC)
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*/
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#define GST_MP3_TYPEFIND_TRY_HEADERS 5
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#define GST_MP3_TYPEFIND_TRY_SYNC (GST_TYPE_FIND_MAXIMUM * 100) /* 10kB */
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#define GST_MP3_TYPEFIND_SYNC_SIZE 2048
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static void
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mp3_type_find (GstTypeFind * tf, gpointer unused)
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{
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guint8 *data = NULL;
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guint size = 0;
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guint64 skipped = 0;
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while (skipped < GST_MP3_TYPEFIND_TRY_SYNC) {
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if (size <= 0) {
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data = gst_type_find_peek (tf, skipped, GST_MP3_TYPEFIND_SYNC_SIZE);
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if (!data)
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break;
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size = GST_MP3_TYPEFIND_SYNC_SIZE;
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}
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if (*data == 0xFF) {
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guint8 *head_data = NULL;
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guint layer, bitrate, samplerate, channels;
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guint found = 0; /* number of valid headers found */
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guint64 offset = skipped;
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while (found < GST_MP3_TYPEFIND_TRY_HEADERS) {
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guint32 head;
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guint length;
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guint prev_layer = 0, prev_bitrate = 0,
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prev_channels = 0, prev_samplerate = 0;
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if (offset + 4 <= skipped + size) {
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head_data = data + offset - skipped;
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} else {
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head_data = gst_type_find_peek (tf, offset, 4);
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}
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if (!head_data)
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break;
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head = GST_READ_UINT32_BE (head_data);
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if (!(length = mp3_type_frame_length_from_header (head, &layer,
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&channels, &bitrate, &samplerate))) {
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GST_LOG ("%d. header at offset %" G_GUINT64_FORMAT
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" was not an mp3 header", found + 1, offset);
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break;
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}
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if ((prev_layer && prev_layer != layer) ||
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/* (prev_bitrate && prev_bitrate != bitrate) || <-- VBR */
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(prev_samplerate && prev_samplerate != samplerate) ||
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(prev_channels && prev_channels != channels)) {
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/* this means an invalid property, or a change, which might mean
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* that this is not a mp3 but just a random bytestream. It could
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* be a freaking funky encoded mp3 though. We'll just not count
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* this header*/
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prev_layer = layer;
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prev_bitrate = bitrate;
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prev_channels = channels;
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prev_samplerate = samplerate;
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} else {
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found++;
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}
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offset += length;
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}
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g_assert (found <= GST_MP3_TYPEFIND_TRY_HEADERS);
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if (found == GST_MP3_TYPEFIND_TRY_HEADERS || head_data == NULL) {
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/* we can make a valid guess */
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guint probability = found * GST_TYPE_FIND_MAXIMUM *
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(GST_MP3_TYPEFIND_TRY_SYNC - skipped) /
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GST_MP3_TYPEFIND_TRY_HEADERS / GST_MP3_TYPEFIND_TRY_SYNC;
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if (probability < GST_TYPE_FIND_MINIMUM)
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probability = GST_TYPE_FIND_MINIMUM;
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/* make sure we're not id3 tagged */
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head_data = gst_type_find_peek (tf, -128, 3);
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if (!head_data) {
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probability = probability * 4 / 5;
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} else if (memcmp (head_data, "TAG", 3) == 0) {
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probability = 0;
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}
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g_assert (probability <= GST_TYPE_FIND_MAXIMUM);
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if (probability > 0) {
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GstCaps *caps;
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g_assert (layer > 0);
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caps = gst_caps_copy (MP3_CAPS);
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gst_structure_set (gst_caps_get_structure (caps, 0), "layer",
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G_TYPE_INT, layer, 0);
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gst_type_find_suggest (tf, probability, caps);
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gst_caps_free (caps);
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}
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return;
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}
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}
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data++;
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skipped++;
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size--;
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}
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}
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/*** video/mpeg systemstream **************************************************/
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static GstStaticCaps mpeg_sys_caps = GST_STATIC_CAPS ("video/mpeg, "
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"systemstream = (boolean) true, mpegversion = (int) [ 1, 2 ]");
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#define MPEG_SYS_CAPS gst_static_caps_get(&mpeg_sys_caps)
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#define IS_MPEG_HEADER(data) ((((guint8 *)data)[0] == 0x00) && \
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(((guint8 *)data)[1] == 0x00) && \
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(((guint8 *)data)[2] == 0x01) && \
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(((guint8 *)data)[3] == 0xBA))
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#define IS_MPEG_SYSTEM_HEADER(data) ((((guint8 *)data)[0] == 0x00) && \
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(((guint8 *)data)[1] == 0x00) && \
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(((guint8 *)data)[2] == 0x01) && \
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(((guint8 *)data)[3] == 0xBB))
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#define IS_MPEG_PACKET_HEADER(data) ((((guint8 *)data)[0] == 0x00) && \
|
|
(((guint8 *)data)[1] == 0x00) && \
|
|
(((guint8 *)data)[2] == 0x01) && \
|
|
((((guint8 *)data)[3] & 0x80) == 0x80))
|
|
static void
|
|
mpeg2_sys_type_find (GstTypeFind * tf, gpointer unused)
|
|
{
|
|
guint8 *data = gst_type_find_peek (tf, 0, 5);
|
|
|
|
if (data && IS_MPEG_HEADER (data)) {
|
|
if ((data[4] & 0xC0) == 0x40) {
|
|
/* type 2 */
|
|
GstCaps *caps = gst_caps_copy (MPEG_SYS_CAPS);
|
|
|
|
gst_structure_set (gst_caps_get_structure (caps, 0), "mpegversion",
|
|
G_TYPE_INT, 2, 0);
|
|
gst_type_find_suggest (tf, GST_TYPE_FIND_MAXIMUM, caps);
|
|
} else if ((data[4] & 0xF0) == 0x20) {
|
|
GstCaps *caps = gst_caps_copy (MPEG_SYS_CAPS);
|
|
|
|
gst_structure_set (gst_caps_get_structure (caps, 0), "mpegversion",
|
|
G_TYPE_INT, 1, 0);
|
|
gst_type_find_suggest (tf, GST_TYPE_FIND_MAXIMUM, caps);
|
|
gst_caps_free (caps);
|
|
}
|
|
}
|
|
};
|
|
|
|
/* ATTANTION: ugly return value:
|
|
* 0 - invalid data
|
|
* 1 - not enough data
|
|
* anything else - size until next package
|
|
*/
|
|
static guint
|
|
mpeg1_parse_header (GstTypeFind * tf, guint64 offset)
|
|
{
|
|
guint8 *data = gst_type_find_peek (tf, offset, 4);
|
|
guint size;
|
|
|
|
if (!data) {
|
|
GST_LOG ("couldn't get MPEG header bytes");
|
|
return 1;
|
|
}
|
|
|
|
if (data[0] != 0 || data[1] != 0 || data[2] != 1) {
|
|
return 0;
|
|
}
|
|
offset += 4;
|
|
|
|
switch (data[3]) {
|
|
case 0xBA: /* pack header */
|
|
data = gst_type_find_peek (tf, offset, 8);
|
|
if (!data) {
|
|
GST_LOG ("couldn't get MPEG pack header bytes");
|
|
return 1;
|
|
}
|
|
size = 12;
|
|
/* check marker bits */
|
|
if ((data[0] & 0xF1) != 0x21 ||
|
|
(data[2] & 0x01) != 0x01 ||
|
|
(data[4] & 0x01) != 0x01 ||
|
|
(data[5] & 0x80) != 0x80 || (data[7] & 0x01) != 0x01)
|
|
return 0;
|
|
break;
|
|
|
|
case 0xB9: /* ISO end code */
|
|
size = 4;
|
|
break;
|
|
|
|
case 0xBB: /* system header */
|
|
data = gst_type_find_peek (tf, offset, 2);
|
|
if (!data) {
|
|
GST_LOG ("couldn't get MPEG pack header bytes");
|
|
return 1;
|
|
}
|
|
size = GST_READ_UINT16_BE (data) + 6;
|
|
offset += 2;
|
|
data = gst_type_find_peek (tf, offset, size - 6);
|
|
if (!data) {
|
|
GST_LOG ("couldn't get MPEG pack header bytes");
|
|
return 1;
|
|
}
|
|
/* check marker bits */
|
|
if ((data[0] & 0x80) != 0x80 ||
|
|
(data[2] & 0x01) != 0x01 || (data[4] & 0x20) != 0x20)
|
|
return 0;
|
|
/* check stream marker bits */
|
|
for (offset = 6; offset < (size - 6); offset += 3) {
|
|
if (data[offset] <= 0xBB || (data[offset + 1] & 0xC0) != 0xC0)
|
|
return 0;
|
|
}
|
|
break;
|
|
|
|
default:
|
|
if (data[3] < 0xB9)
|
|
return 0;
|
|
data = gst_type_find_peek (tf, offset, 2);
|
|
if (!data) {
|
|
GST_LOG ("couldn't get MPEG pack header bytes");
|
|
return 1;
|
|
}
|
|
size = GST_READ_UINT16_BE (data) + 6;
|
|
/* FIXME: we could check PTS/DTS marker bits here... (bit overkill) */
|
|
break;
|
|
}
|
|
|
|
return size;
|
|
}
|
|
|
|
/* calculation of possibility to identify random data as mpeg systemstream:
|
|
* bits that must match in header detection: 32 (or more)
|
|
* chance that random data is identifed: 1/2^32
|
|
* chance that GST_MPEG_TYPEFIND_TRY_HEADERS headers are identified:
|
|
* 1/2^(32*GST_MPEG_TYPEFIND_TRY_HEADERS)
|
|
* chance that this happens in GST_MPEG_TYPEFIND_TRY_SYNC bytes:
|
|
* 1-(1+1/2^(32*GST_MPEG_TYPEFIND_TRY_HEADERS)^GST_MPEG_TYPEFIND_TRY_SYNC)
|
|
* for current values:
|
|
* 1-(1+1/2^(32*4)^101024)
|
|
* = <some_number>
|
|
*/
|
|
#define GST_MPEG_TYPEFIND_TRY_HEADERS 4
|
|
#define GST_MPEG_TYPEFIND_TRY_SYNC (100 * 1024) /* 100kB */
|
|
#define GST_MPEG_TYPEFIND_SYNC_SIZE 2048
|
|
static void
|
|
mpeg1_sys_type_find (GstTypeFind * tf, gpointer unused)
|
|
{
|
|
guint8 *data = NULL;
|
|
guint size = 0;
|
|
guint64 skipped = 0;
|
|
GstCaps *caps;
|
|
|
|
while (skipped < GST_MPEG_TYPEFIND_TRY_SYNC) {
|
|
if (size < 4) {
|
|
data = gst_type_find_peek (tf, skipped, GST_MPEG_TYPEFIND_SYNC_SIZE);
|
|
if (!data)
|
|
break;
|
|
size = GST_MPEG_TYPEFIND_SYNC_SIZE;
|
|
}
|
|
if (IS_MPEG_HEADER (data)) {
|
|
/* found packet start code */
|
|
guint found = 0;
|
|
guint packet_size = 0;
|
|
guint64 offset = skipped;
|
|
|
|
while (found < GST_MPEG_TYPEFIND_TRY_HEADERS) {
|
|
packet_size = mpeg1_parse_header (tf, offset);
|
|
if (packet_size <= 1)
|
|
break;
|
|
offset += packet_size;
|
|
found++;
|
|
}
|
|
g_assert (found <= GST_MPEG_TYPEFIND_TRY_HEADERS);
|
|
if (found == GST_MPEG_TYPEFIND_TRY_HEADERS || packet_size == 1) {
|
|
caps = gst_caps_copy (MPEG_SYS_CAPS);
|
|
gst_structure_set (gst_caps_get_structure (caps, 0), "mpegversion",
|
|
G_TYPE_INT, 1, 0);
|
|
gst_type_find_suggest (tf, GST_TYPE_FIND_MAXIMUM - 1, caps);
|
|
gst_caps_free (caps);
|
|
return;
|
|
}
|
|
}
|
|
data++;
|
|
skipped++;
|
|
size--;
|
|
}
|
|
}
|
|
|
|
/*** video/mpeg video stream **************************************************/
|
|
|
|
static GstStaticCaps mpeg_video_caps = GST_STATIC_CAPS ("video/mpeg, "
|
|
"systemstream = (boolean) false");
|
|
#define MPEG_VIDEO_CAPS gst_static_caps_get(&mpeg_video_caps)
|
|
static void
|
|
mpeg_video_type_find (GstTypeFind * tf, gpointer unused)
|
|
{
|
|
static const guint8 sequence_header[] = { 0x00, 0x00, 0x01, 0xb3 };
|
|
guint8 *data = NULL;
|
|
|
|
data = gst_type_find_peek (tf, 0, 8);
|
|
|
|
if (data && memcmp (data, sequence_header, 4) == 0) {
|
|
GstCaps *caps = gst_caps_copy (MPEG_VIDEO_CAPS);
|
|
|
|
gst_structure_set (gst_caps_get_structure (caps, 0), "mpegversion",
|
|
G_TYPE_INT, 1, 0);
|
|
gst_type_find_suggest (tf, GST_TYPE_FIND_MAXIMUM - 1, caps);
|
|
gst_caps_free (caps);
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Idea is the same as MPEG system stream typefinding: We check each
|
|
* byte of the stream to see if - from that point on - the stream
|
|
* matches a predefined set of marker bits as defined in the MPEG
|
|
* video specs.
|
|
*
|
|
* I'm sure someone will do a chance calculation here too.
|
|
*/
|
|
|
|
#define GST_MPEGVID_TYPEFIND_TRY_PICTURES 6
|
|
#define GST_MPEGVID_TYPEFIND_TRY_SYNC (100 * 1024) /* 100 kB */
|
|
#define GST_MPEGVID_TYPEFIND_SYNC_SIZE 2048
|
|
|
|
static void
|
|
mpeg_video_stream_type_find (GstTypeFind * tf, gpointer unused)
|
|
{
|
|
gint size = 0, found = 0;
|
|
guint64 skipped = 0;
|
|
guint8 *data = NULL;
|
|
|
|
while (1) {
|
|
if (found >= GST_MPEGVID_TYPEFIND_TRY_PICTURES) {
|
|
GstCaps *caps = gst_caps_copy (MPEG_VIDEO_CAPS);
|
|
|
|
gst_structure_set (gst_caps_get_structure (caps, 0), "mpegversion",
|
|
G_TYPE_INT, 1, 0);
|
|
gst_type_find_suggest (tf, GST_TYPE_FIND_MAXIMUM - 2, caps);
|
|
gst_caps_free (caps);
|
|
return;
|
|
}
|
|
|
|
if (skipped > GST_MPEGVID_TYPEFIND_TRY_SYNC)
|
|
break;
|
|
|
|
if (size < 5) {
|
|
data = gst_type_find_peek (tf, skipped, GST_MPEGVID_TYPEFIND_SYNC_SIZE);
|
|
if (!data)
|
|
break;
|
|
size = GST_MPEGVID_TYPEFIND_SYNC_SIZE;
|
|
}
|
|
|
|
/* are we a sequence (0xB3) or GOP (0xB8) header? */
|
|
if (data[0] == 0x0 && data[1] == 0x0 && data[2] == 0x1 &&
|
|
(data[3] == 0xB3 || data[3] == 0xB8)) {
|
|
size -= 8;
|
|
data += 8;
|
|
skipped += 8;
|
|
if (data[3] == 0xB3)
|
|
continue;
|
|
else if (size < 4) {
|
|
data = gst_type_find_peek (tf, skipped, GST_MPEGVID_TYPEFIND_SYNC_SIZE);
|
|
size = GST_MPEGVID_TYPEFIND_SYNC_SIZE;
|
|
if (!data)
|
|
break;
|
|
}
|
|
/* else, we should now see an image */
|
|
}
|
|
|
|
/* image header (and, when found, slice header) */
|
|
if (data[0] == 0x0 && data[1] == 0x0 && data[2] == 0x1 && data[4] == 0x0) {
|
|
size -= 8;
|
|
data += 8;
|
|
skipped += 8;
|
|
if (size < 5) {
|
|
data = gst_type_find_peek (tf, skipped, GST_MPEGVID_TYPEFIND_SYNC_SIZE);
|
|
size = GST_MPEGVID_TYPEFIND_SYNC_SIZE;
|
|
if (!data)
|
|
break;
|
|
}
|
|
if ((data[0] == 0x0 && data[1] == 0x0 &&
|
|
data[2] == 0x1 && data[3] == 0x1) ||
|
|
(data[1] == 0x0 && data[2] == 0x0 &&
|
|
data[3] == 0x1 && data[4] == 0x1)) {
|
|
size -= 4;
|
|
data += 4;
|
|
skipped += 4;
|
|
found += 1;
|
|
continue;
|
|
}
|
|
}
|
|
|
|
size--;
|
|
data++;
|
|
skipped++;
|
|
}
|
|
}
|
|
|
|
/*** video/quicktime***********************************************************/
|
|
|
|
static GstStaticCaps qt_caps = GST_STATIC_CAPS ("video/quicktime");
|
|
|
|
#define QT_CAPS gst_static_caps_get(&qt_caps)
|
|
static void
|
|
qt_type_find (GstTypeFind * tf, gpointer unused)
|
|
{
|
|
guint8 *data;
|
|
guint tip = 0;
|
|
guint64 offset = 0;
|
|
|
|
while ((data = gst_type_find_peek (tf, offset, 8)) != NULL) {
|
|
if (strncmp (&data[4], "wide", 4) != 0 &&
|
|
strncmp (&data[4], "moov", 4) != 0 &&
|
|
strncmp (&data[4], "mdat", 4) != 0 &&
|
|
strncmp (&data[4], "pnot", 4) != 0 &&
|
|
strncmp (&data[4], "PICT", 4) != 0 &&
|
|
strncmp (&data[4], "ftyp", 4) != 0 &&
|
|
strncmp (&data[4], "free", 4) != 0) {
|
|
tip = 0;
|
|
break;
|
|
}
|
|
if (tip == 0) {
|
|
tip = GST_TYPE_FIND_LIKELY;
|
|
} else {
|
|
tip = GST_TYPE_FIND_MAXIMUM;
|
|
break;
|
|
}
|
|
offset += GST_READ_UINT32_BE (data);
|
|
}
|
|
if (tip > 0) {
|
|
gst_type_find_suggest (tf, tip, QT_CAPS);
|
|
}
|
|
};
|
|
|
|
/*** audio/x-aiff *********************************************/
|
|
|
|
static GstStaticCaps aiff_caps = GST_STATIC_CAPS ("audio/x-aiff");
|
|
|
|
#define AIFF_CAPS gst_static_caps_get(&aiff_caps)
|
|
static void
|
|
aiff_type_find (GstTypeFind * tf, gpointer unused)
|
|
{
|
|
guint8 *data = gst_type_find_peek (tf, 0, 4);
|
|
|
|
if (data && memcmp (data, "FORM", 4) == 0) {
|
|
data += 8;
|
|
if (memcmp (data, "AIFF", 4) == 0)
|
|
gst_type_find_suggest (tf, GST_TYPE_FIND_MAXIMUM, AIFF_CAPS);
|
|
}
|
|
}
|
|
|
|
/*** audio/x-shorten ****************************************/
|
|
|
|
static GstStaticCaps shn_caps = GST_STATIC_CAPS ("audio/x-shorten");
|
|
|
|
#define SHN_CAPS gst_static_caps_get(&shn_caps)
|
|
static void
|
|
shn_type_find (GstTypeFind * tf, gpointer unused)
|
|
{
|
|
guint8 *data = gst_type_find_peek (tf, 0, 4);
|
|
|
|
if (data && memcmp (data, "ajkg", 4) == 0) {
|
|
gst_type_find_suggest (tf, GST_TYPE_FIND_MAXIMUM, SHN_CAPS);
|
|
}
|
|
data = gst_type_find_peek (tf, -8, 8);
|
|
if (data && memcmp (data, "SHNAMPSK", 8) == 0) {
|
|
gst_type_find_suggest (tf, GST_TYPE_FIND_MAXIMUM, SHN_CAPS);
|
|
}
|
|
}
|
|
|
|
/*** application/x-ape *********************************************/
|
|
|
|
static GstStaticCaps ape_caps = GST_STATIC_CAPS ("application/x-ape");
|
|
|
|
#define APE_CAPS gst_static_caps_get(&ape_caps)
|
|
static void
|
|
ape_type_find (GstTypeFind * tf, gpointer unused)
|
|
{
|
|
guint8 *data = gst_type_find_peek (tf, 0, 4);
|
|
|
|
if (data && memcmp (data, "MAC ", 4) == 0) {
|
|
gst_type_find_suggest (tf, GST_TYPE_FIND_MAXIMUM, APE_CAPS);
|
|
}
|
|
}
|
|
|
|
/*** audio/x-m4a *********************************************/
|
|
|
|
static GstStaticCaps aac_caps = GST_STATIC_CAPS ("audio/x-m4a");
|
|
|
|
#define AAC_CAPS (gst_static_caps_get(&aac_caps))
|
|
static void
|
|
m4a_type_find (GstTypeFind * tf, gpointer unused)
|
|
{
|
|
guint8 *data = gst_type_find_peek (tf, 4, 8);
|
|
|
|
if (data && memcmp (data, "ftypM4A ", 8) == 0) {
|
|
gst_type_find_suggest (tf, GST_TYPE_FIND_MAXIMUM, AAC_CAPS);
|
|
}
|
|
}
|
|
|
|
/*** audio/x-mod *********************************************/
|
|
|
|
static GstStaticCaps mod_caps = GST_STATIC_CAPS ("audio/x-mod");
|
|
|
|
#define MOD_CAPS gst_static_caps_get(&mod_caps)
|
|
/* FIXME: M15 CheckType to do */
|
|
static void
|
|
mod_type_find (GstTypeFind * tf, gpointer unused)
|
|
{
|
|
guint8 *data;
|
|
|
|
/* MOD */
|
|
if ((data = gst_type_find_peek (tf, 1080, 4)) != NULL) {
|
|
/* Protracker and variants */
|
|
if ((memcmp (data, "M.K.", 4) == 0) || (memcmp (data, "M!K!", 4) == 0) ||
|
|
/* Star Tracker */
|
|
(memcmp (data, "FLT", 3) == 0 && isdigit (data[3])) ||
|
|
(memcmp (data, "EXO", 3) == 0 && isdigit (data[3])) ||
|
|
/* Oktalyzer (Amiga) */
|
|
(memcmp (data, "OKTA", 4) == 0) ||
|
|
/* Oktalyser (Atari) */
|
|
(memcmp (data, "CD81", 4) == 0) ||
|
|
/* Fasttracker */
|
|
(memcmp (data + 1, "CHN", 3) == 0 && isdigit (data[0])) ||
|
|
/* Fasttracker or Taketracker */
|
|
(memcmp (data + 2, "CH", 2) == 0 && isdigit (data[0])
|
|
&& isdigit (data[1])) || (memcmp (data + 2, "CN", 2) == 0
|
|
&& isdigit (data[0]) && isdigit (data[1]))) {
|
|
gst_type_find_suggest (tf, GST_TYPE_FIND_MAXIMUM, MOD_CAPS);
|
|
return;
|
|
}
|
|
}
|
|
/* XM */
|
|
if ((data = gst_type_find_peek (tf, 0, 38)) != NULL) {
|
|
if (memcmp (data, "Extended Module: ", 17) == 0 && data[37] == 0x1A) {
|
|
gst_type_find_suggest (tf, GST_TYPE_FIND_MAXIMUM, MOD_CAPS);
|
|
return;
|
|
}
|
|
}
|
|
/* OKT */
|
|
if (data || (data = gst_type_find_peek (tf, 0, 8)) != NULL) {
|
|
if (memcmp (data, "OKTASONG", 8) == 0) {
|
|
gst_type_find_suggest (tf, GST_TYPE_FIND_MAXIMUM, MOD_CAPS);
|
|
return;
|
|
}
|
|
}
|
|
if (data || (data = gst_type_find_peek (tf, 0, 4)) != NULL) {
|
|
/* 669 */
|
|
if ((memcmp (data, "if", 2) == 0) || (memcmp (data, "JN", 2) == 0)) {
|
|
gst_type_find_suggest (tf, GST_TYPE_FIND_LIKELY, MOD_CAPS);
|
|
return;
|
|
}
|
|
/* AMF */
|
|
if ((memcmp (data, "AMF", 3) == 0 && data[3] > 10 && data[3] < 14) ||
|
|
/* IT */
|
|
(memcmp (data, "IMPM", 4) == 0) ||
|
|
/* MED */
|
|
(memcmp (data, "MMD0", 4) == 0) || (memcmp (data, "MMD1", 4) == 0) ||
|
|
/* MTM */
|
|
(memcmp (data, "MTM", 3) == 0)) {
|
|
gst_type_find_suggest (tf, GST_TYPE_FIND_MAXIMUM, MOD_CAPS);
|
|
return;
|
|
}
|
|
/* DSM */
|
|
if (memcmp (data, "RIFF", 4) == 0) {
|
|
guint8 *data2 = gst_type_find_peek (tf, 8, 4);
|
|
|
|
if (data2) {
|
|
if (memcmp (data2, "DSMF", 4) == 0) {
|
|
gst_type_find_suggest (tf, GST_TYPE_FIND_MAXIMUM, MOD_CAPS);
|
|
return;
|
|
}
|
|
}
|
|
}
|
|
/* FAM */
|
|
if (memcmp (data, "FAM\xFE", 4) == 0) {
|
|
guint8 *data2 = gst_type_find_peek (tf, 44, 3);
|
|
|
|
if (data2) {
|
|
if (memcmp (data2, "compare", 3) == 0) {
|
|
gst_type_find_suggest (tf, GST_TYPE_FIND_MAXIMUM, MOD_CAPS);
|
|
return;
|
|
}
|
|
} else {
|
|
gst_type_find_suggest (tf, GST_TYPE_FIND_LIKELY, MOD_CAPS);
|
|
return;
|
|
}
|
|
}
|
|
/* GDM */
|
|
if (memcmp (data, "GDM\xFE", 4) == 0) {
|
|
guint8 *data2 = gst_type_find_peek (tf, 71, 4);
|
|
|
|
if (data2) {
|
|
if (memcmp (data2, "GMFS", 4) == 0) {
|
|
gst_type_find_suggest (tf, GST_TYPE_FIND_MAXIMUM, MOD_CAPS);
|
|
return;
|
|
}
|
|
} else {
|
|
gst_type_find_suggest (tf, GST_TYPE_FIND_LIKELY, MOD_CAPS);
|
|
return;
|
|
}
|
|
}
|
|
}
|
|
/* IMF */
|
|
if ((data = gst_type_find_peek (tf, 60, 4)) != NULL) {
|
|
if (memcmp (data, "IM10", 4) == 0) {
|
|
gst_type_find_suggest (tf, GST_TYPE_FIND_MAXIMUM, MOD_CAPS);
|
|
return;
|
|
}
|
|
}
|
|
/* S3M */
|
|
if ((data = gst_type_find_peek (tf, 44, 4)) != NULL) {
|
|
if (memcmp (data, "SCRM", 4) == 0) {
|
|
gst_type_find_suggest (tf, GST_TYPE_FIND_MAXIMUM, MOD_CAPS);
|
|
return;
|
|
}
|
|
}
|
|
}
|
|
|
|
/*** application/x-shockwave-flash ********************************************/
|
|
|
|
static GstStaticCaps swf_caps =
|
|
GST_STATIC_CAPS ("application/x-shockwave-flash");
|
|
#define SWF_CAPS (gst_static_caps_get(&swf_caps))
|
|
static void
|
|
swf_type_find (GstTypeFind * tf, gpointer unused)
|
|
{
|
|
guint8 *data = gst_type_find_peek (tf, 0, 4);
|
|
|
|
if (data && (data[0] == 'F' || data[0] == 'C') &&
|
|
data[1] == 'W' && data[2] == 'S') {
|
|
gst_type_find_suggest (tf, GST_TYPE_FIND_MAXIMUM, SWF_CAPS);
|
|
}
|
|
}
|
|
|
|
/*** image/jpeg ***************************************************************/
|
|
|
|
static GstStaticCaps jpeg_caps = GST_STATIC_CAPS ("image/jpeg");
|
|
|
|
#define JPEG_CAPS (gst_static_caps_get(&jpeg_caps))
|
|
static void
|
|
jpeg_type_find (GstTypeFind * tf, gpointer unused)
|
|
{
|
|
guint8 *data = gst_type_find_peek (tf, 0, 10);
|
|
guint8 header[2] = { 0xFF, 0xD8 };
|
|
|
|
if (data && memcmp (data, header, 2) == 0) {
|
|
if (memcmp (data + 6, "JFIF", 4) == 0) {
|
|
gst_type_find_suggest (tf, GST_TYPE_FIND_MAXIMUM, JPEG_CAPS);
|
|
} else if (memcmp (data + 6, "Exif", 4) == 0) {
|
|
gst_type_find_suggest (tf, GST_TYPE_FIND_MAXIMUM, JPEG_CAPS);
|
|
} else {
|
|
gst_type_find_suggest (tf, GST_TYPE_FIND_POSSIBLE, JPEG_CAPS);
|
|
}
|
|
}
|
|
}
|
|
|
|
/*** image/bmp *********************/
|
|
|
|
static GstStaticCaps bmp_caps = GST_STATIC_CAPS ("image/bmp");
|
|
|
|
#define BMP_CAPS (gst_static_caps_get(&bmp_caps))
|
|
static void
|
|
bmp_type_find (GstTypeFind * tf, gpointer unused)
|
|
{
|
|
guint8 *data = gst_type_find_peek (tf, 0, 18);
|
|
|
|
if (data && memcmp (data, "BM", 2) == 0) {
|
|
if ((data[14] == 0x0C ||
|
|
data[14] == 0x28 ||
|
|
data[14] == 0xF0) &&
|
|
data[15] == 0 && data[16] == 0 && data[17] == 0) {
|
|
gst_type_find_suggest (tf, GST_TYPE_FIND_MAXIMUM, BMP_CAPS);
|
|
}
|
|
}
|
|
}
|
|
|
|
/*** image/tiff ********************/
|
|
static GstStaticCaps tiff_caps = GST_STATIC_CAPS ("image/tiff, "
|
|
"endianness = (int) { BIG_ENDIAN, LITTLE_ENDIAN }");
|
|
#define TIFF_CAPS (gst_static_caps_get(&tiff_caps))
|
|
static GstStaticCaps tiff_be_caps = GST_STATIC_CAPS ("image/tiff, "
|
|
"endianness = (int) BIG_ENDIAN");
|
|
#define TIFF_BE_CAPS (gst_static_caps_get(&tiff_be_caps))
|
|
static GstStaticCaps tiff_le_caps = GST_STATIC_CAPS ("image/tiff, "
|
|
"endianness = (int) LITTLE_ENDIAN");
|
|
#define TIFF_LE_CAPS (gst_static_caps_get(&tiff_le_caps))
|
|
static void
|
|
tiff_type_find (GstTypeFind * tf, gpointer ununsed)
|
|
{
|
|
guint8 *data = gst_type_find_peek (tf, 0, 8);
|
|
guint8 le_header[4] = { 0x49, 0x49, 0x2A, 0x00 };
|
|
guint8 be_header[4] = { 0x4D, 0x4D, 0x00, 0x2A };
|
|
|
|
if (data) {
|
|
if (memcmp (data, le_header, 4) == 0) {
|
|
gst_type_find_suggest (tf, GST_TYPE_FIND_MAXIMUM, TIFF_LE_CAPS);
|
|
} else if (memcmp (data, be_header, 4) == 0) {
|
|
gst_type_find_suggest (tf, GST_TYPE_FIND_MAXIMUM, TIFF_BE_CAPS);
|
|
}
|
|
}
|
|
}
|
|
|
|
/*** video/x-matroska ********************/
|
|
static GstStaticCaps matroska_caps = GST_STATIC_CAPS ("video/x-matroska");
|
|
|
|
#define MATROSKA_CAPS (gst_static_caps_get(&matroska_caps))
|
|
static void
|
|
matroska_type_find (GstTypeFind * tf, gpointer ununsed)
|
|
{
|
|
/* 4 bytes for EBML ID, 1 byte for header length identifier */
|
|
guint8 *data = gst_type_find_peek (tf, 0, 4 + 1);
|
|
gint len_mask = 0x80, size = 1, n = 1, total;
|
|
guint8 probe_data[] = { 'm', 'a', 't', 'r', 'o', 's', 'k', 'a' };
|
|
|
|
if (!data)
|
|
return;
|
|
|
|
/* ebml header? */
|
|
if (data[0] != 0x1A || data[1] != 0x45 || data[2] != 0xDF || data[3] != 0xA3)
|
|
return;
|
|
|
|
/* length of header */
|
|
total = data[4];
|
|
while (size <= 8 && !(total & len_mask)) {
|
|
size++;
|
|
len_mask >>= 1;
|
|
}
|
|
if (size > 8)
|
|
return;
|
|
total &= (len_mask - 1);
|
|
while (n < size)
|
|
total = (total << 8) | data[4 + n++];
|
|
|
|
/* get new data for full header, 4 bytes for EBML ID,
|
|
* EBML length tag and the actual header */
|
|
data = gst_type_find_peek (tf, 0, 4 + size + total);
|
|
if (!data)
|
|
return;
|
|
|
|
/* the header must contain the document type 'matroska'. For now,
|
|
* we don't parse the whole header but simply check for the
|
|
* availability of that array of characters inside the header.
|
|
* Not fully fool-proof, but good enough. */
|
|
for (n = 4 + size; n < 4 + size + total - sizeof (probe_data); n++)
|
|
if (!memcmp (&data[n], probe_data, sizeof (probe_data))) {
|
|
gst_type_find_suggest (tf, GST_TYPE_FIND_MAXIMUM, MATROSKA_CAPS);
|
|
break;
|
|
}
|
|
}
|
|
|
|
/*** video/x-dv ***************************************************************/
|
|
|
|
static GstStaticCaps dv_caps = GST_STATIC_CAPS ("video/x-dv, "
|
|
"systemstream = (boolean) true");
|
|
#define DV_CAPS (gst_static_caps_get(&dv_caps))
|
|
static void
|
|
dv_type_find (GstTypeFind * tf, gpointer private)
|
|
{
|
|
guint8 *data;
|
|
|
|
data = gst_type_find_peek (tf, 0, 5);
|
|
|
|
/* check for DIF and DV flag */
|
|
if (data && (data[0] == 0x1f) && (data[1] == 0x07) && (data[2] == 0x00) &&
|
|
((data[4] & 0x01) == 0)) {
|
|
gchar *format;
|
|
GstCaps *caps = gst_caps_copy (DV_CAPS);
|
|
|
|
if (data[3] & 0x80) {
|
|
format = "PAL";
|
|
} else {
|
|
format = "NTSC";
|
|
}
|
|
gst_structure_set (gst_caps_get_structure (caps, 0), "format",
|
|
G_TYPE_STRING, format, NULL);
|
|
|
|
gst_type_find_suggest (tf, GST_TYPE_FIND_MAXIMUM, caps);
|
|
gst_caps_free (caps);
|
|
}
|
|
}
|
|
|
|
/*** audio/x-vorbis ***********************************************************/
|
|
|
|
static GstStaticCaps vorbis_caps = GST_STATIC_CAPS ("audio/x-vorbis");
|
|
|
|
#define VORBIS_CAPS (gst_static_caps_get(&vorbis_caps))
|
|
static void
|
|
vorbis_type_find (GstTypeFind * tf, gpointer private)
|
|
{
|
|
guint8 *data = gst_type_find_peek (tf, 0, 30);
|
|
|
|
if (data) {
|
|
guint blocksize_0;
|
|
guint blocksize_1;
|
|
|
|
/* 1 byte packet type (identification=0x01)
|
|
6 byte string "vorbis"
|
|
4 byte vorbis version */
|
|
if (memcmp (data, "\001vorbis\000\000\000\000", 11) != 0)
|
|
return;
|
|
data += 11;
|
|
/* 1 byte channels must be != 0 */
|
|
if (data[0] == 0)
|
|
return;
|
|
data++;
|
|
/* 4 byte samplerate must be != 0 */
|
|
if (*((guint32 *) data) == 0)
|
|
return;
|
|
data += 16;
|
|
/* blocksize checks */
|
|
blocksize_0 = data[0] & 0x0F;
|
|
blocksize_1 = (data[0] & 0xF0) >> 4;
|
|
if (blocksize_0 > blocksize_1)
|
|
return;
|
|
if (blocksize_0 < 6 || blocksize_0 > 13)
|
|
return;
|
|
if (blocksize_1 < 6 || blocksize_1 > 13)
|
|
return;
|
|
data++;
|
|
/* framing bit */
|
|
if ((data[0] & 0x01) != 1)
|
|
return;
|
|
gst_type_find_suggest (tf, GST_TYPE_FIND_MAXIMUM, VORBIS_CAPS);
|
|
}
|
|
}
|
|
|
|
/*** video/x-theora ***********************************************************/
|
|
|
|
static GstStaticCaps theora_caps = GST_STATIC_CAPS ("video/x-theora");
|
|
|
|
#define THEORA_CAPS (gst_static_caps_get(&theora_caps))
|
|
static void
|
|
theora_type_find (GstTypeFind * tf, gpointer private)
|
|
{
|
|
guint8 *data = gst_type_find_peek (tf, 0, 7); //42);
|
|
|
|
if (data) {
|
|
if (data[0] != 0x80)
|
|
return;
|
|
if (memcmp (&data[1], "theora", 6) != 0)
|
|
return;
|
|
/* FIXME: make this more reliable when specs are out */
|
|
|
|
gst_type_find_suggest (tf, GST_TYPE_FIND_MAXIMUM, THEORA_CAPS);
|
|
}
|
|
}
|
|
|
|
/*** audio/x-speex ***********************************************************/
|
|
|
|
static GstStaticCaps speex_caps = GST_STATIC_CAPS ("audio/x-speex");
|
|
|
|
#define SPEEX_CAPS (gst_static_caps_get(&speex_caps))
|
|
static void
|
|
speex_type_find (GstTypeFind * tf, gpointer private)
|
|
{
|
|
guint8 *data = gst_type_find_peek (tf, 0, 80);
|
|
|
|
if (data) {
|
|
/* 8 byte string "Speex "
|
|
24 byte speex version string + int */
|
|
if (memcmp (data, "Speex ", 8) != 0)
|
|
return;
|
|
data += 32;
|
|
|
|
/* 4 byte header size >= 80 */
|
|
if (GST_READ_UINT32_LE (data) < 80)
|
|
return;
|
|
data += 4;
|
|
|
|
/* 4 byte sample rate <= 48000 */
|
|
if (GST_READ_UINT32_LE (data) > 48000)
|
|
return;
|
|
data += 4;
|
|
|
|
/* currently there are only 3 speex modes. */
|
|
if (GST_READ_UINT32_LE (data) > 3)
|
|
return;
|
|
data += 12;
|
|
|
|
gst_type_find_suggest (tf, GST_TYPE_FIND_MAXIMUM, SPEEX_CAPS);
|
|
}
|
|
}
|
|
|
|
/*** generic typefind for streams that have some data at a specific position***/
|
|
|
|
typedef struct
|
|
{
|
|
guint8 *data;
|
|
guint size;
|
|
guint probability;
|
|
GstCaps *caps;
|
|
}
|
|
GstTypeFindData;
|
|
static void
|
|
start_with_type_find (GstTypeFind * tf, gpointer private)
|
|
{
|
|
GstTypeFindData *start_with = (GstTypeFindData *) private;
|
|
guint8 *data;
|
|
|
|
GST_LOG ("trying to find mime type %s with the first %u bytes of data",
|
|
gst_structure_get_name (gst_caps_get_structure (start_with->caps, 0)),
|
|
start_with->size);
|
|
data = gst_type_find_peek (tf, 0, start_with->size);
|
|
if (data && memcmp (data, start_with->data, start_with->size) == 0) {
|
|
gst_type_find_suggest (tf, start_with->probability, start_with->caps);
|
|
}
|
|
}
|
|
|
|
#define TYPE_FIND_REGISTER_START_WITH(plugin,name,rank,ext,_data,_size,_probability)\
|
|
G_BEGIN_DECLS{ \
|
|
GstTypeFindData *sw_data = g_new (GstTypeFindData, 1); \
|
|
sw_data->data = _data; \
|
|
sw_data->size = _size; \
|
|
sw_data->probability = _probability; \
|
|
sw_data->caps = gst_caps_new_simple (name, NULL); \
|
|
TYPE_FIND_REGISTER (plugin, name, rank, start_with_type_find, \
|
|
ext, sw_data->caps, sw_data); \
|
|
}G_END_DECLS
|
|
|
|
/*** same for riff types ******************************************************/
|
|
|
|
static void
|
|
riff_type_find (GstTypeFind * tf, gpointer private)
|
|
{
|
|
GstTypeFindData *riff_data = (GstTypeFindData *) private;
|
|
guint8 *data = gst_type_find_peek (tf, 0, 12);
|
|
|
|
if (data && memcmp (data, "RIFF", 4) == 0) {
|
|
data += 8;
|
|
if (memcmp (data, riff_data->data, 4) == 0)
|
|
gst_type_find_suggest (tf, riff_data->probability, riff_data->caps);
|
|
}
|
|
}
|
|
|
|
#define TYPE_FIND_REGISTER_RIFF(plugin,name,rank,ext,_data) \
|
|
G_BEGIN_DECLS{ \
|
|
GstTypeFindData *sw_data = g_new (GstTypeFindData, 1); \
|
|
sw_data->data = _data; \
|
|
sw_data->size = 4; \
|
|
sw_data->probability = GST_TYPE_FIND_MAXIMUM; \
|
|
sw_data->caps = gst_caps_new_simple (name, NULL); \
|
|
TYPE_FIND_REGISTER (plugin, name, rank, riff_type_find, \
|
|
ext, sw_data->caps, sw_data); \
|
|
}G_END_DECLS
|
|
|
|
/*** plugin initialization ****************************************************/
|
|
|
|
#define TYPE_FIND_REGISTER(plugin,name,rank,func,ext,caps,priv) G_BEGIN_DECLS{\
|
|
if (!gst_type_find_register (plugin, name, rank, func, ext, caps, priv))\
|
|
return FALSE; \
|
|
}G_END_DECLS
|
|
static gboolean
|
|
plugin_init (GstPlugin * plugin)
|
|
{
|
|
/* can't initialize this via a struct as caps can't be statically initialized */
|
|
|
|
/* note: asx/wax/wmx are XML files, asf doesn't handle them */
|
|
static gchar *asf_exts[] = { "asf", "wm", "wma", "wmv", NULL };
|
|
static gchar *au_exts[] = { "au", "snd", NULL };
|
|
static gchar *avi_exts[] = { "avi", NULL };
|
|
static gchar *cdxa_exts[] = { "dat", NULL };
|
|
static gchar *flac_exts[] = { "flac", NULL };
|
|
static gchar *flx_exts[] = { "flc", "fli", NULL };
|
|
static gchar *id3_exts[] =
|
|
{ "mp3", "mp2", "mp1", "mpga", "ogg", "flac", NULL };
|
|
static gchar *mod_exts[] = { "669", "amf", "dsm", "gdm", "far", "imf",
|
|
"it", "med", "mod", "mtm", "okt", "sam",
|
|
"s3m", "stm", "stx", "ult", "xm", NULL
|
|
};
|
|
static gchar *mp3_exts[] = { "mp3", "mp2", "mp1", "mpga", NULL };
|
|
static gchar *mpeg_sys_exts[] = { "mpe", "mpeg", "mpg", NULL };
|
|
static gchar *mpeg_video_exts[] = { "mpv", "mpeg", "mpg", NULL };
|
|
static gchar *ogg_exts[] = { "ogg", NULL };
|
|
static gchar *qt_exts[] = { "mov", NULL };
|
|
static gchar *rm_exts[] = { "ra", "ram", "rm", NULL };
|
|
static gchar *swf_exts[] = { "swf", "swfl", NULL };
|
|
static gchar *utf8_exts[] = { "txt", NULL };
|
|
static gchar *wav_exts[] = { "wav", NULL };
|
|
static gchar *aiff_exts[] = { "aiff", "aif", "aifc", NULL };
|
|
static gchar *shn_exts[] = { "shn", NULL };
|
|
static gchar *ape_exts[] = { "ape", NULL };
|
|
static gchar *uri_exts[] = { "ram", NULL };
|
|
static gchar *jpeg_exts[] = { "jpg", "jpe", "jpeg", NULL };
|
|
static gchar *gif_exts[] = { "gif", NULL };
|
|
static gchar *png_exts[] = { "png", NULL };
|
|
static gchar *bmp_exts[] = { "bmp", NULL };
|
|
static gchar *tiff_exts[] = { "tif", "tiff", NULL };
|
|
static gchar *matroska_exts[] = { "mkv", "mka", NULL };
|
|
static gchar *dv_exts[] = { "dv", NULL };
|
|
static gchar *sid_exts[] = { "sid", NULL };
|
|
static gchar *xcf_exts[] = { "xcf", NULL };
|
|
static gchar *mng_exts[] = { "mng", NULL };
|
|
static gchar *jng_exts[] = { "jng", NULL };
|
|
static gchar *xpm_exts[] = { "xpm", NULL };
|
|
static gchar *ras_exts[] = { "ras", NULL };
|
|
static gchar *bz2_exts[] = { "bz2", NULL };
|
|
static gchar *gz_exts[] = { "gz", NULL };
|
|
static gchar *zip_exts[] = { "zip", NULL };
|
|
static gchar *compress_exts[] = { "Z", NULL };
|
|
static gchar *m4a_exts[] = { "m4a", NULL };
|
|
|
|
GST_DEBUG_CATEGORY_INIT (type_find_debug, "typefindfunctions",
|
|
GST_DEBUG_FG_GREEN | GST_DEBUG_BG_RED, "generic type find functions");
|
|
|
|
/* must use strings, macros don't accept initializers */
|
|
TYPE_FIND_REGISTER_START_WITH (plugin, "video/x-ms-asf", GST_RANK_SECONDARY,
|
|
asf_exts,
|
|
"\060\046\262\165\216\146\317\021\246\331\000\252\000\142\316\154", 16,
|
|
GST_TYPE_FIND_MAXIMUM);
|
|
TYPE_FIND_REGISTER_START_WITH (plugin, "audio/x-au", GST_RANK_MARGINAL,
|
|
au_exts, ".snd", 4, GST_TYPE_FIND_MAXIMUM);
|
|
TYPE_FIND_REGISTER_RIFF (plugin, "video/x-msvideo", GST_RANK_PRIMARY,
|
|
avi_exts, "AVI ");
|
|
TYPE_FIND_REGISTER_RIFF (plugin, "video/x-cdxa", GST_RANK_SECONDARY,
|
|
cdxa_exts, "CDXA");
|
|
TYPE_FIND_REGISTER_START_WITH (plugin, "audio/x-flac", GST_RANK_PRIMARY,
|
|
flac_exts, "fLaC", 4, GST_TYPE_FIND_MAXIMUM);
|
|
TYPE_FIND_REGISTER (plugin, "video/x-fli", GST_RANK_MARGINAL, flx_type_find,
|
|
flx_exts, FLX_CAPS, NULL);
|
|
TYPE_FIND_REGISTER (plugin, "application/x-id3", GST_RANK_PRIMARY,
|
|
id3_type_find, id3_exts, ID3_CAPS, NULL);
|
|
TYPE_FIND_REGISTER (plugin, "audio/x-mod", GST_RANK_SECONDARY, mod_type_find,
|
|
mod_exts, MOD_CAPS, NULL);
|
|
TYPE_FIND_REGISTER (plugin, "audio/mpeg", GST_RANK_PRIMARY, mp3_type_find,
|
|
mp3_exts, MP3_CAPS, NULL);
|
|
TYPE_FIND_REGISTER (plugin, "video/mpeg1", GST_RANK_PRIMARY,
|
|
mpeg1_sys_type_find, mpeg_sys_exts, MPEG_SYS_CAPS, NULL);
|
|
TYPE_FIND_REGISTER (plugin, "video/mpeg2", GST_RANK_SECONDARY,
|
|
mpeg2_sys_type_find, mpeg_sys_exts, MPEG_SYS_CAPS, NULL);
|
|
TYPE_FIND_REGISTER_START_WITH (plugin, "application/ogg", GST_RANK_PRIMARY,
|
|
ogg_exts, "OggS", 4, GST_TYPE_FIND_MAXIMUM);
|
|
TYPE_FIND_REGISTER (plugin, "video/mpeg", GST_RANK_SECONDARY,
|
|
mpeg_video_type_find, mpeg_video_exts, MPEG_VIDEO_CAPS, NULL);
|
|
TYPE_FIND_REGISTER (plugin, "video/mpeg", GST_RANK_MARGINAL,
|
|
mpeg_video_stream_type_find, mpeg_video_exts, MPEG_VIDEO_CAPS, NULL);
|
|
TYPE_FIND_REGISTER (plugin, "video/quicktime", GST_RANK_SECONDARY,
|
|
qt_type_find, qt_exts, QT_CAPS, NULL);
|
|
TYPE_FIND_REGISTER_START_WITH (plugin, "application/vnd.rn-realmedia",
|
|
GST_RANK_SECONDARY, rm_exts, ".RMF", 4, GST_TYPE_FIND_MAXIMUM);
|
|
TYPE_FIND_REGISTER (plugin, "application/x-shockwave-flash",
|
|
GST_RANK_SECONDARY, swf_type_find, swf_exts, SWF_CAPS, NULL);
|
|
TYPE_FIND_REGISTER (plugin, "text/plain", GST_RANK_MARGINAL, utf8_type_find,
|
|
utf8_exts, UTF8_CAPS, NULL);
|
|
TYPE_FIND_REGISTER (plugin, "text/uri-list", GST_RANK_MARGINAL, uri_type_find,
|
|
uri_exts, URI_CAPS, NULL);
|
|
TYPE_FIND_REGISTER_RIFF (plugin, "audio/x-wav", GST_RANK_PRIMARY, wav_exts,
|
|
"WAVE");
|
|
TYPE_FIND_REGISTER (plugin, "audio/x-aiff", GST_RANK_SECONDARY,
|
|
aiff_type_find, aiff_exts, AIFF_CAPS, NULL);
|
|
TYPE_FIND_REGISTER (plugin, "audio/x-shorten", GST_RANK_SECONDARY,
|
|
shn_type_find, shn_exts, SHN_CAPS, NULL);
|
|
TYPE_FIND_REGISTER (plugin, "application/x-ape", GST_RANK_SECONDARY,
|
|
ape_type_find, ape_exts, APE_CAPS, NULL);
|
|
TYPE_FIND_REGISTER (plugin, "image/jpeg", GST_RANK_PRIMARY, jpeg_type_find,
|
|
jpeg_exts, JPEG_CAPS, NULL);
|
|
TYPE_FIND_REGISTER_START_WITH (plugin, "image/gif", GST_RANK_PRIMARY,
|
|
gif_exts, "GIF8", 4, GST_TYPE_FIND_MAXIMUM);
|
|
TYPE_FIND_REGISTER_START_WITH (plugin, "image/png", GST_RANK_PRIMARY,
|
|
png_exts, "\211PNG\015\012\032\012", 8, GST_TYPE_FIND_MAXIMUM);
|
|
TYPE_FIND_REGISTER (plugin, "image/bmp", GST_RANK_PRIMARY, bmp_type_find,
|
|
bmp_exts, BMP_CAPS, NULL);
|
|
TYPE_FIND_REGISTER (plugin, "image/tiff", GST_RANK_PRIMARY, tiff_type_find,
|
|
tiff_exts, TIFF_CAPS, NULL);
|
|
TYPE_FIND_REGISTER (plugin, "video/x-matroska", GST_RANK_PRIMARY,
|
|
matroska_type_find, matroska_exts, MATROSKA_CAPS, NULL);
|
|
TYPE_FIND_REGISTER (plugin, "video/x-dv", GST_RANK_SECONDARY, dv_type_find,
|
|
dv_exts, DV_CAPS, NULL);
|
|
TYPE_FIND_REGISTER_START_WITH (plugin, "audio/x-sid", GST_RANK_MARGINAL,
|
|
sid_exts, "PSID", 4, GST_TYPE_FIND_MAXIMUM);
|
|
TYPE_FIND_REGISTER_START_WITH (plugin, "image/x-xcf", GST_RANK_SECONDARY,
|
|
xcf_exts, "gimp xcf", 8, GST_TYPE_FIND_MAXIMUM);
|
|
TYPE_FIND_REGISTER_START_WITH (plugin, "video/x-mng", GST_RANK_SECONDARY,
|
|
mng_exts, "\212MNG\015\012\032\012", 8, GST_TYPE_FIND_MAXIMUM);
|
|
TYPE_FIND_REGISTER_START_WITH (plugin, "image/x-jng", GST_RANK_SECONDARY,
|
|
jng_exts, "\213JNG\015\012\032\012", 8, GST_TYPE_FIND_MAXIMUM);
|
|
TYPE_FIND_REGISTER_START_WITH (plugin, "image/x-xpixmap", GST_RANK_SECONDARY,
|
|
xpm_exts, "/* XPM */", 9, GST_TYPE_FIND_MAXIMUM);
|
|
TYPE_FIND_REGISTER_START_WITH (plugin, "image/x-sun-raster",
|
|
GST_RANK_SECONDARY, ras_exts, "\131\246\152\225", 4,
|
|
GST_TYPE_FIND_MAXIMUM);
|
|
TYPE_FIND_REGISTER_START_WITH (plugin, "application/x-bzip",
|
|
GST_RANK_SECONDARY, bz2_exts, "BZh", 3, GST_TYPE_FIND_LIKELY);
|
|
TYPE_FIND_REGISTER_START_WITH (plugin, "application/x-gzip",
|
|
GST_RANK_SECONDARY, gz_exts, "\037\213", 2, GST_TYPE_FIND_LIKELY);
|
|
TYPE_FIND_REGISTER_START_WITH (plugin, "application/zip", GST_RANK_SECONDARY,
|
|
zip_exts, "PK\003\004", 4, GST_TYPE_FIND_LIKELY);
|
|
TYPE_FIND_REGISTER_START_WITH (plugin, "application/x-compress",
|
|
GST_RANK_SECONDARY, compress_exts, "\037\235", 2, GST_TYPE_FIND_LIKELY);
|
|
TYPE_FIND_REGISTER (plugin, "audio/x-vorbis", GST_RANK_PRIMARY,
|
|
vorbis_type_find, NULL, VORBIS_CAPS, NULL);
|
|
TYPE_FIND_REGISTER (plugin, "video/x-theora", GST_RANK_PRIMARY,
|
|
theora_type_find, NULL, THEORA_CAPS, NULL);
|
|
TYPE_FIND_REGISTER (plugin, "audio/x-speex", GST_RANK_PRIMARY,
|
|
speex_type_find, NULL, SPEEX_CAPS, NULL);
|
|
TYPE_FIND_REGISTER (plugin, "audio/x-m4a", GST_RANK_PRIMARY, m4a_type_find,
|
|
m4a_exts, AAC_CAPS, NULL);
|
|
|
|
return TRUE;
|
|
}
|
|
|
|
GST_PLUGIN_DEFINE (GST_VERSION_MAJOR,
|
|
GST_VERSION_MINOR,
|
|
"typefindfunctions",
|
|
"default typefind functions",
|
|
plugin_init, VERSION, GST_LICENSE, GST_PACKAGE, GST_ORIGIN)
|