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gstreamer/gst/matroska/matroska-demux.c
Thomas Vander Stichele f8e224d950 pixel aspect ratio handling 
Original commit message from CVS:
pixel aspect ratio handling
2004-07-27 16:43:20 +00:00

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/* GStreamer Matroska muxer/demuxer
* (c) 2003 Ronald Bultje <rbultje@ronald.bitfreak.net>
*
* matroska-demux.c: matroska file/stream demuxer
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this library; if not, write to the
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <math.h>
#include <string.h>
/* For AVI compatibility mode... Who did that? */
#include <gst/riff/riff-ids.h>
#include <gst/riff/riff-media.h>
#include "matroska-demux.h"
#include "matroska-ids.h"
GST_DEBUG_CATEGORY (matroskademux_debug);
#define GST_CAT_DEFAULT matroskademux_debug
enum
{
/* FILL ME */
LAST_SIGNAL
};
enum
{
ARG_0,
ARG_METADATA,
ARG_STREAMINFO
/* FILL ME */
};
static GstStaticPadTemplate sink_templ = GST_STATIC_PAD_TEMPLATE ("sink",
GST_PAD_SINK,
GST_PAD_ALWAYS,
GST_STATIC_CAPS ("video/x-matroska")
);
/* gobject magic foo */
static void gst_matroska_demux_base_init (GstMatroskaDemuxClass * klass);
static void gst_matroska_demux_class_init (GstMatroskaDemuxClass * klass);
static void gst_matroska_demux_init (GstMatroskaDemux * demux);
/* element functions */
static void gst_matroska_demux_loop (GstElement * element);
static gboolean gst_matroska_demux_send_event (GstElement * element,
GstEvent * event);
/* pad functions */
static const GstEventMask *gst_matroska_demux_get_event_mask (GstPad * pad);
static gboolean gst_matroska_demux_handle_src_event (GstPad * pad,
GstEvent * event);
static const GstFormat *gst_matroska_demux_get_src_formats (GstPad * pad);
static const GstQueryType *gst_matroska_demux_get_src_query_types (GstPad *
pad);
static gboolean gst_matroska_demux_handle_src_query (GstPad * pad,
GstQueryType type, GstFormat * format, gint64 * value);
/* gst internal change state handler */
static GstElementStateReturn
gst_matroska_demux_change_state (GstElement * element);
static void gst_matroska_demux_set_clock (GstElement * element,
GstClock * clock);
/* caps functions */
static GstCaps *gst_matroska_demux_video_caps (GstMatroskaTrackVideoContext
* videocontext,
const gchar * codec_id,
gpointer data, guint size, GstMatroskaDemux * demux);
static GstCaps *gst_matroska_demux_audio_caps (GstMatroskaTrackAudioContext
* audiocontext,
const gchar * codec_id,
gpointer data, guint size, GstMatroskaDemux * demux);
static GstCaps *gst_matroska_demux_complex_caps (GstMatroskaTrackComplexContext
* complexcontext, const gchar * codec_id, gpointer data, guint size);
static GstCaps
* gst_matroska_demux_subtitle_caps (GstMatroskaTrackSubtitleContext *
subtitlecontext, const gchar * codec_id, gpointer data, guint size);
/* stream methods */
static void gst_matroska_demux_reset (GstElement * element);
static GstEbmlReadClass *parent_class = NULL;
static GstPadTemplate *videosrctempl, *audiosrctempl, *subtitlesrctempl;
/*static guint gst_matroska_demux_signals[LAST_SIGNAL] = { 0 };*/
GType
gst_matroska_demux_get_type (void)
{
static GType gst_matroska_demux_type = 0;
if (!gst_matroska_demux_type) {
static const GTypeInfo gst_matroska_demux_info = {
sizeof (GstMatroskaDemuxClass),
(GBaseInitFunc) gst_matroska_demux_base_init,
NULL,
(GClassInitFunc) gst_matroska_demux_class_init,
NULL,
NULL,
sizeof (GstMatroskaDemux),
0,
(GInstanceInitFunc) gst_matroska_demux_init,
};
gst_matroska_demux_type =
g_type_register_static (GST_TYPE_EBML_READ,
"GstMatroskaDemux", &gst_matroska_demux_info, 0);
}
return gst_matroska_demux_type;
}
static void
gst_matroska_demux_base_init (GstMatroskaDemuxClass * klass)
{
GstElementClass *element_class = GST_ELEMENT_CLASS (klass);
static GstElementDetails gst_matroska_demux_details = {
"Matroska demuxer",
"Codec/Demuxer",
"Demuxes a Matroska Stream into video/audio/subtitles",
"Ronald Bultje <rbultje@ronald.bitfreak.net>"
};
gst_element_class_add_pad_template (element_class, videosrctempl);
gst_element_class_add_pad_template (element_class, audiosrctempl);
gst_element_class_add_pad_template (element_class, subtitlesrctempl);
gst_element_class_add_pad_template (element_class,
gst_static_pad_template_get (&sink_templ));
gst_element_class_set_details (element_class, &gst_matroska_demux_details);
}
static void
gst_matroska_demux_class_init (GstMatroskaDemuxClass * klass)
{
GstElementClass *gstelement_class;
gstelement_class = (GstElementClass *) klass;
parent_class = g_type_class_ref (GST_TYPE_EBML_READ);
gstelement_class->change_state = gst_matroska_demux_change_state;
gstelement_class->send_event = gst_matroska_demux_send_event;
gstelement_class->set_clock = gst_matroska_demux_set_clock;
GST_DEBUG_CATEGORY_INIT (matroskademux_debug, "matroskademux", 0,
"Matroska demuxer");
}
static void
gst_matroska_demux_init (GstMatroskaDemux * demux)
{
GstElementClass *klass = GST_ELEMENT_GET_CLASS (demux);
gint i;
GST_FLAG_SET (GST_OBJECT (demux), GST_ELEMENT_EVENT_AWARE);
demux->sinkpad =
gst_pad_new_from_template (gst_element_class_get_pad_template (klass,
"sink"), "sink");
gst_element_add_pad (GST_ELEMENT (demux), demux->sinkpad);
GST_EBML_READ (demux)->sinkpad = demux->sinkpad;
gst_element_set_loop_function (GST_ELEMENT (demux), gst_matroska_demux_loop);
/* initial stream no. */
for (i = 0; i < GST_MATROSKA_DEMUX_MAX_STREAMS; i++) {
demux->src[i] = NULL;
}
demux->writing_app = demux->muxing_app = NULL;
demux->index = NULL;
/* finish off */
gst_matroska_demux_reset (GST_ELEMENT (demux));
}
static void
gst_matroska_demux_reset (GstElement * element)
{
GstMatroskaDemux *demux = GST_MATROSKA_DEMUX (element);
guint i;
/* reset input */
demux->state = GST_MATROSKA_DEMUX_STATE_START;
/* clean up existing streams */
for (i = 0; i < GST_MATROSKA_DEMUX_MAX_STREAMS; i++) {
if (demux->src[i] != NULL) {
if (demux->src[i]->pad != NULL) {
gst_element_remove_pad (GST_ELEMENT (demux), demux->src[i]->pad);
}
g_free (demux->src[i]->codec_id);
g_free (demux->src[i]->codec_name);
g_free (demux->src[i]->name);
g_free (demux->src[i]->language);
g_free (demux->src[i]->codec_priv);
g_free (demux->src[i]);
demux->src[i] = NULL;
}
}
demux->num_streams = 0;
demux->num_a_streams = 0;
demux->num_t_streams = 0;
demux->num_v_streams = 0;
/* reset media info */
g_free (demux->writing_app);
demux->writing_app = NULL;
g_free (demux->muxing_app);
demux->muxing_app = NULL;
/* reset indexes */
demux->num_indexes = 0;
g_free (demux->index);
demux->index = NULL;
/* reset timers */
demux->clock = NULL;
demux->time_scale = 1000000;
demux->duration = 0;
demux->pos = 0;
demux->created = G_MININT64;
demux->seek_pending = GST_CLOCK_TIME_NONE;
demux->metadata_parsed = FALSE;
demux->index_parsed = FALSE;
}
static void
gst_matroska_demux_set_clock (GstElement * element, GstClock * clock)
{
GST_MATROSKA_DEMUX (element)->clock = clock;
}
static gint
gst_matroska_demux_stream_from_num (GstMatroskaDemux * demux, guint track_num)
{
guint n;
for (n = 0; n < demux->num_streams; n++) {
if (demux->src[n] != NULL && demux->src[n]->num == track_num) {
return n;
}
}
if (n == demux->num_streams) {
GST_WARNING ("Failed to find corresponding pad for tracknum %d", track_num);
}
return -1;
}
static GstCaps *
gst_matroska_demux_src_getcaps (GstPad * pad)
{
GstMatroskaDemux *demux = GST_MATROSKA_DEMUX (gst_pad_get_parent (pad));
guint n;
for (n = 0; n < demux->num_streams; n++) {
if (demux->src[n] != NULL && demux->src[n]->pad == pad) {
break;
}
}
if (n == demux->num_streams)
return gst_caps_new_empty ();
return gst_caps_copy (demux->src[n]->caps);
}
static gboolean
gst_matroska_demux_add_stream (GstMatroskaDemux * demux)
{
GstElementClass *klass = GST_ELEMENT_GET_CLASS (demux);
GstEbmlRead *ebml = GST_EBML_READ (demux);
GstMatroskaTrackContext *context;
GstPadTemplate *templ = NULL;
GstCaps *caps = NULL;
gchar *padname = NULL;
gboolean res = TRUE;
guint32 id;
if (demux->num_streams >= GST_MATROSKA_DEMUX_MAX_STREAMS) {
GST_WARNING ("Maximum number of streams (%d) exceeded, skipping",
GST_MATROSKA_DEMUX_MAX_STREAMS);
return gst_ebml_read_skip (ebml); /* skip-and-continue */
}
/* allocate generic... if we know the type, we'll g_renew()
* with the precise type */
context = g_new0 (GstMatroskaTrackContext, 1);
demux->src[demux->num_streams] = context;
context->index = demux->num_streams;
context->type = 0; /* no type yet */
demux->num_streams++;
/* start with the master */
if (!gst_ebml_read_master (ebml, &id))
return FALSE;
/* try reading the trackentry headers */
while (res) {
if (!(id = gst_ebml_peek_id (ebml, &demux->level_up))) {
res = FALSE;
break;
} else if (demux->level_up > 0) {
demux->level_up--;
break;
}
switch (id) {
/* track number (unique stream ID) */
case GST_MATROSKA_ID_TRACKNUMBER:{
guint64 num;
if (!gst_ebml_read_uint (ebml, &id, &num)) {
res = FALSE;
break;
}
context->num = num;
break;
}
/* track UID (unique identifier) */
case GST_MATROSKA_ID_TRACKUID:{
guint64 num;
if (!gst_ebml_read_uint (ebml, &id, &num)) {
res = FALSE;
break;
}
context->uid = num;
break;
}
/* track type (video, audio, combined, subtitle, etc.) */
case GST_MATROSKA_ID_TRACKTYPE:{
guint64 num;
if (context->type != 0) {
GST_WARNING
("More than one tracktype defined in a trackentry - skipping");
break;
}
if (!gst_ebml_read_uint (ebml, &id, &num)) {
res = FALSE;
break;
}
context->type = num;
/* ok, so we're actually going to reallocate this thing */
switch (context->type) {
case GST_MATROSKA_TRACK_TYPE_VIDEO:
context = (GstMatroskaTrackContext *)
g_renew (GstMatroskaTrackVideoContext, context, 1);
break;
case GST_MATROSKA_TRACK_TYPE_AUDIO:
context = (GstMatroskaTrackContext *)
g_renew (GstMatroskaTrackAudioContext, context, 1);
/* defaults */
((GstMatroskaTrackAudioContext *) context)->channels = 1;
((GstMatroskaTrackAudioContext *) context)->samplerate = 8000;
break;
case GST_MATROSKA_TRACK_TYPE_COMPLEX:
context = (GstMatroskaTrackContext *)
g_renew (GstMatroskaTrackComplexContext, context, 1);
break;
case GST_MATROSKA_TRACK_TYPE_SUBTITLE:
context = (GstMatroskaTrackContext *)
g_renew (GstMatroskaTrackSubtitleContext, context, 1);
break;
case GST_MATROSKA_TRACK_TYPE_LOGO:
case GST_MATROSKA_TRACK_TYPE_CONTROL:
default:
GST_WARNING ("Unknown or unsupported track type 0x%x",
context->type);
context->type = 0;
break;
}
demux->src[demux->num_streams - 1] = context;
break;
}
/* tracktype specific stuff for video */
case GST_MATROSKA_ID_TRACKVIDEO:{
GstMatroskaTrackVideoContext *videocontext;
if (context->type != GST_MATROSKA_TRACK_TYPE_VIDEO) {
GST_WARNING
("trackvideo EBML entry in non-video track - ignoring track");
res = FALSE;
break;
} else if (!gst_ebml_read_master (ebml, &id)) {
res = FALSE;
break;
}
videocontext = (GstMatroskaTrackVideoContext *) context;
while (res) {
if (!(id = gst_ebml_peek_id (ebml, &demux->level_up))) {
res = FALSE;
break;
} else if (demux->level_up > 0) {
demux->level_up--;
break;
}
switch (id) {
/* fixme, this should be one-up, but I get it here (?) */
case GST_MATROSKA_ID_TRACKDEFAULTDURATION:{
guint64 num;
if (!gst_ebml_read_uint (ebml, &id, &num)) {
res = FALSE;
break;
}
context->default_duration = num;
break;
}
/* video framerate */
case GST_MATROSKA_ID_VIDEOFRAMERATE:{
gdouble num;
if (!gst_ebml_read_float (ebml, &id, &num)) {
res = FALSE;
break;
}
context->default_duration = GST_SECOND * (1. / num);
break;
}
/* width of the size to display the video at */
case GST_MATROSKA_ID_VIDEODISPLAYWIDTH:{
guint64 num;
if (!gst_ebml_read_uint (ebml, &id, &num)) {
res = FALSE;
break;
}
videocontext->display_width = num;
GST_DEBUG ("display_width %" G_GUINT64_FORMAT, num);
break;
}
/* height of the size to display the video at */
case GST_MATROSKA_ID_VIDEODISPLAYHEIGHT:{
guint64 num;
if (!gst_ebml_read_uint (ebml, &id, &num)) {
res = FALSE;
break;
}
videocontext->display_height = num;
GST_DEBUG ("display_height %" G_GUINT64_FORMAT, num);
break;
}
/* width of the video in the file */
case GST_MATROSKA_ID_VIDEOPIXELWIDTH:{
guint64 num;
if (!gst_ebml_read_uint (ebml, &id, &num)) {
res = FALSE;
break;
}
videocontext->pixel_width = num;
GST_DEBUG ("pixel_width %" G_GUINT64_FORMAT, num);
break;
}
/* height of the video in the file */
case GST_MATROSKA_ID_VIDEOPIXELHEIGHT:{
guint64 num;
if (!gst_ebml_read_uint (ebml, &id, &num)) {
res = FALSE;
break;
}
videocontext->pixel_height = num;
GST_DEBUG ("pixel_height %" G_GUINT64_FORMAT, num);
break;
}
/* whether the video is interlaced */
case GST_MATROSKA_ID_VIDEOFLAGINTERLACED:{
guint64 num;
if (!gst_ebml_read_uint (ebml, &id, &num)) {
res = FALSE;
break;
}
if (num)
context->flags |= GST_MATROSKA_VIDEOTRACK_INTERLACED;
else
context->flags &= ~GST_MATROSKA_VIDEOTRACK_INTERLACED;
break;
}
/* stereo mode (whether the video has two streams, where
* one is for the left eye and the other for the right eye,
* which creates a 3D-like effect) */
case GST_MATROSKA_ID_VIDEOSTEREOMODE:{
guint64 num;
if (!gst_ebml_read_uint (ebml, &id, &num)) {
res = FALSE;
break;
}
if (num != GST_MATROSKA_EYE_MODE_MONO &&
num != GST_MATROSKA_EYE_MODE_LEFT &&
num != GST_MATROSKA_EYE_MODE_RIGHT &&
num != GST_MATROSKA_EYE_MODE_BOTH) {
GST_WARNING ("Unknown eye mode 0x%x - ignoring", (guint) num);
break;
}
videocontext->eye_mode = num;
break;
}
/* aspect ratio behaviour */
case GST_MATROSKA_ID_VIDEOASPECTRATIO:{
guint64 num;
if (!gst_ebml_read_uint (ebml, &id, &num)) {
res = FALSE;
break;
}
if (num != GST_MATROSKA_ASPECT_RATIO_MODE_FREE &&
num != GST_MATROSKA_ASPECT_RATIO_MODE_KEEP &&
num != GST_MATROSKA_ASPECT_RATIO_MODE_FIXED) {
GST_WARNING ("Unknown aspect ratio mode 0x%x - ignoring",
(guint) num);
break;
}
videocontext->asr_mode = num;
break;
}
/* colourspace (only matters for raw video) fourcc */
case GST_MATROSKA_ID_VIDEOCOLOURSPACE:{
guint64 num;
if (!gst_ebml_read_uint (ebml, &id, &num)) {
res = FALSE;
break;
}
videocontext->fourcc = num;
break;
}
default:
GST_WARNING ("Unknown video track header entry 0x%x - ignoring",
id);
/* pass-through */
case GST_EBML_ID_VOID:
if (!gst_ebml_read_skip (ebml))
res = FALSE;
break;
}
if (demux->level_up) {
demux->level_up--;
break;
}
}
break;
}
/* tracktype specific stuff for audio */
case GST_MATROSKA_ID_TRACKAUDIO:{
GstMatroskaTrackAudioContext *audiocontext;
if (context->type != GST_MATROSKA_TRACK_TYPE_AUDIO) {
GST_WARNING
("trackaudio EBML entry in non-audio track - ignoring track");
res = FALSE;
break;
} else if (!gst_ebml_read_master (ebml, &id)) {
res = FALSE;
break;
}
audiocontext = (GstMatroskaTrackAudioContext *) context;
while (res) {
if (!(id = gst_ebml_peek_id (ebml, &demux->level_up))) {
res = FALSE;
break;
} else if (demux->level_up > 0) {
demux->level_up--;
break;
}
switch (id) {
/* samplerate */
case GST_MATROSKA_ID_AUDIOSAMPLINGFREQ:{
gdouble num;
if (!gst_ebml_read_float (ebml, &id, &num)) {
res = FALSE;
break;
}
audiocontext->samplerate = num;
break;
}
/* bitdepth */
case GST_MATROSKA_ID_AUDIOBITDEPTH:{
guint64 num;
if (!gst_ebml_read_uint (ebml, &id, &num)) {
res = FALSE;
break;
}
audiocontext->bitdepth = num;
break;
}
/* channels */
case GST_MATROSKA_ID_AUDIOCHANNELS:{
guint64 num;
if (!gst_ebml_read_uint (ebml, &id, &num)) {
res = FALSE;
break;
}
audiocontext->channels = num;
break;
}
default:
GST_WARNING ("Unknown audio track header entry 0x%x - ignoring",
id);
/* pass-through */
case GST_EBML_ID_VOID:
if (!gst_ebml_read_skip (ebml))
res = FALSE;
break;
}
if (demux->level_up) {
demux->level_up--;
break;
}
}
break;
}
/* codec identifier */
case GST_MATROSKA_ID_CODECID:{
gchar *text;
if (!gst_ebml_read_ascii (ebml, &id, &text)) {
res = FALSE;
break;
}
context->codec_id = text;
break;
}
/* codec private data */
case GST_MATROSKA_ID_CODECPRIVATE:{
guint8 *data;
guint64 size;
if (!gst_ebml_read_binary (ebml, &id, &data, &size)) {
res = FALSE;
break;
}
context->codec_priv = data;
context->codec_priv_size = size;
break;
}
/* name of the codec */
case GST_MATROSKA_ID_CODECNAME:{
gchar *text;
if (!gst_ebml_read_utf8 (ebml, &id, &text)) {
res = FALSE;
break;
}
context->codec_name = text;
break;
}
/* name of this track */
case GST_MATROSKA_ID_TRACKNAME:{
gchar *text;
if (!gst_ebml_read_utf8 (ebml, &id, &text)) {
res = FALSE;
break;
}
context->name = text;
break;
}
/* language (matters for audio/subtitles, mostly) */
case GST_MATROSKA_ID_TRACKLANGUAGE:{
gchar *text;
if (!gst_ebml_read_utf8 (ebml, &id, &text)) {
res = FALSE;
break;
}
context->language = text;
break;
}
/* whether this is actually used */
case GST_MATROSKA_ID_TRACKFLAGENABLED:{
guint64 num;
if (!gst_ebml_read_uint (ebml, &id, &num)) {
res = FALSE;
break;
}
if (num)
context->flags |= GST_MATROSKA_TRACK_ENABLED;
else
context->flags &= ~GST_MATROSKA_TRACK_ENABLED;
break;
}
/* whether it's the default for this track type */
case GST_MATROSKA_ID_TRACKFLAGDEFAULT:{
guint64 num;
if (!gst_ebml_read_uint (ebml, &id, &num)) {
res = FALSE;
break;
}
if (num)
context->flags |= GST_MATROSKA_TRACK_DEFAULT;
else
context->flags &= ~GST_MATROSKA_TRACK_DEFAULT;
break;
}
/* lacing (like MPEG, where blocks don't end/start on frame
* boundaries) */
case GST_MATROSKA_ID_TRACKFLAGLACING:{
guint64 num;
if (!gst_ebml_read_uint (ebml, &id, &num)) {
res = FALSE;
break;
}
if (num)
context->flags |= GST_MATROSKA_TRACK_LACING;
else
context->flags &= ~GST_MATROSKA_TRACK_LACING;
break;
}
/* default length (in time) of one data block in this track */
case GST_MATROSKA_ID_TRACKDEFAULTDURATION:{
guint64 num;
if (!gst_ebml_read_uint (ebml, &id, &num)) {
res = FALSE;
break;
}
context->default_duration = num;
break;
}
default:
GST_WARNING ("Unknown track header entry 0x%x - ignoring", id);
/* pass-through */
/* we ignore these because they're nothing useful (i.e. crap). */
case GST_MATROSKA_ID_CODECINFOURL:
case GST_MATROSKA_ID_CODECDOWNLOADURL:
case GST_MATROSKA_ID_TRACKMINCACHE:
case GST_MATROSKA_ID_TRACKMAXCACHE:
case GST_EBML_ID_VOID:
if (!gst_ebml_read_skip (ebml))
res = FALSE;
break;
}
if (demux->level_up) {
demux->level_up--;
break;
}
}
if (context->type == 0 || context->codec_id == NULL || !res) {
if (res)
GST_WARNING ("Unknown stream/codec in track entry header");
demux->num_streams--;
demux->src[demux->num_streams] = NULL;
if (context) {
g_free (context->codec_id);
g_free (context->codec_name);
g_free (context->name);
g_free (context->language);
g_free (context->codec_priv);
g_free (context);
}
return res;
}
/* now create the GStreamer connectivity */
switch (context->type) {
case GST_MATROSKA_TRACK_TYPE_VIDEO:{
GstMatroskaTrackVideoContext *videocontext =
(GstMatroskaTrackVideoContext *) context;
padname = g_strdup_printf ("video_%02d", demux->num_v_streams++);
templ = gst_element_class_get_pad_template (klass, "video_%02d");
caps = gst_matroska_demux_video_caps (videocontext,
context->codec_id,
context->codec_priv, context->codec_priv_size, demux);
break;
}
case GST_MATROSKA_TRACK_TYPE_AUDIO:{
GstMatroskaTrackAudioContext *audiocontext =
(GstMatroskaTrackAudioContext *) context;
padname = g_strdup_printf ("audio_%02d", demux->num_a_streams++);
templ = gst_element_class_get_pad_template (klass, "audio_%02d");
caps = gst_matroska_demux_audio_caps (audiocontext,
context->codec_id,
context->codec_priv, context->codec_priv_size, demux);
break;
}
case GST_MATROSKA_TRACK_TYPE_COMPLEX:{
GstMatroskaTrackComplexContext *complexcontext =
(GstMatroskaTrackComplexContext *) context;
padname = g_strdup_printf ("video_%02d", demux->num_v_streams++);
templ = gst_element_class_get_pad_template (klass, "video_%02d");
caps = gst_matroska_demux_complex_caps (complexcontext,
context->codec_id, context->codec_priv, context->codec_priv_size);
break;
}
case GST_MATROSKA_TRACK_TYPE_SUBTITLE:{
GstMatroskaTrackSubtitleContext *subtitlecontext =
(GstMatroskaTrackSubtitleContext *) context;
padname = g_strdup_printf ("subtitle_%02d", demux->num_t_streams++);
templ = gst_element_class_get_pad_template (klass, "subtitle_%02d");
caps = gst_matroska_demux_subtitle_caps (subtitlecontext,
context->codec_id, context->codec_priv, context->codec_priv_size);
break;
}
case GST_MATROSKA_TRACK_TYPE_LOGO:
case GST_MATROSKA_TRACK_TYPE_CONTROL:
default:
/* we should already have quit by now */
g_assert (0);
}
/* the pad in here */
context->pad = gst_pad_new_from_template (templ, padname);
context->caps = caps ? caps : gst_caps_new_empty ();
g_free (padname);
/* set some functions */
gst_pad_set_formats_function (context->pad,
gst_matroska_demux_get_src_formats);
gst_pad_set_event_mask_function (context->pad,
gst_matroska_demux_get_event_mask);
gst_pad_set_event_function (context->pad,
gst_matroska_demux_handle_src_event);
gst_pad_set_query_type_function (context->pad,
gst_matroska_demux_get_src_query_types);
gst_pad_set_query_function (context->pad,
gst_matroska_demux_handle_src_query);
gst_pad_set_getcaps_function (context->pad, gst_matroska_demux_src_getcaps);
gst_element_add_pad (GST_ELEMENT (demux), context->pad);
/* tadaah! */
return TRUE;
}
static const GstFormat *
gst_matroska_demux_get_src_formats (GstPad * pad)
{
/*GstMatroskaDemux *demux = GST_MATROSKA_DEMUX (gst_pad_get_parent (pad)); */
/* we could try to look for units (i.e. samples) in audio streams
* or video streams, but both samplerate and framerate are not
* always constant, and since we only have a time indication, we
* cannot guarantee anything here based purely on index. So, we
* only support time for now. */
static const GstFormat src_formats[] = {
GST_FORMAT_TIME,
(GstFormat) 0
};
return src_formats;
}
static const GstQueryType *
gst_matroska_demux_get_src_query_types (GstPad * pad)
{
static const GstQueryType src_types[] = {
GST_QUERY_TOTAL,
GST_QUERY_POSITION,
(GstQueryType) 0
};
return src_types;
}
static gboolean
gst_matroska_demux_handle_src_query (GstPad * pad,
GstQueryType type, GstFormat * format, gint64 * value)
{
gboolean res = TRUE;
GstMatroskaDemux *demux = GST_MATROSKA_DEMUX (gst_pad_get_parent (pad));
switch (type) {
case GST_QUERY_TOTAL:
switch (*format) {
case GST_FORMAT_DEFAULT:
*format = GST_FORMAT_TIME;
/* fall through */
case GST_FORMAT_TIME:
*value = demux->duration;
break;
default:
res = FALSE;
break;
}
break;
case GST_QUERY_POSITION:
switch (*format) {
case GST_FORMAT_DEFAULT:
*format = GST_FORMAT_TIME;
/* fall through */
case GST_FORMAT_TIME:
*value = demux->pos;
break;
default:
res = FALSE;
break;
}
break;
default:
res = FALSE;
break;
}
return res;
}
static GstMatroskaIndex *
gst_matroskademux_seek (GstMatroskaDemux * demux)
{
guint entry = (guint) - 1;
guint64 offset = demux->seek_pending;
guint n;
/* make sure we don't seek twice */
demux->seek_pending = GST_CLOCK_TIME_NONE;
for (n = 0; n < demux->num_indexes; n++) {
if (entry == (guint) - 1) {
entry = n;
} else {
gfloat diff_old = fabs (1. * (demux->index[entry].time - offset)),
diff_new = fabs (1. * (demux->index[n].time - offset));
if (diff_new < diff_old) {
entry = n;
}
}
}
if (entry != (guint) - 1) {
return &demux->index[entry];
}
return NULL;
}
static gboolean
gst_matroska_demux_send_event (GstElement * element, GstEvent * event)
{
GstMatroskaDemux *demux = GST_MATROSKA_DEMUX (element);
gboolean res = TRUE;
switch (GST_EVENT_TYPE (event)) {
case GST_EVENT_SEEK:
switch (GST_EVENT_SEEK_FORMAT (event)) {
case GST_FORMAT_TIME:
demux->seek_pending = GST_EVENT_SEEK_OFFSET (event);
break;
default:
GST_WARNING ("Only time seek is supported");
res = FALSE;
break;
}
break;
default:
GST_WARNING ("Unhandled event of type %d", GST_EVENT_TYPE (event));
res = FALSE;
break;
}
gst_event_unref (event);
return res;
}
static const GstEventMask *
gst_matroska_demux_get_event_mask (GstPad * pad)
{
static const GstEventMask masks[] = {
{GST_EVENT_SEEK, (GstEventFlag) ((gint) GST_SEEK_METHOD_SET |
(gint) GST_SEEK_FLAG_KEY_UNIT)},
{GST_EVENT_SEEK_SEGMENT, (GstEventFlag) ((gint) GST_SEEK_METHOD_SET |
(gint) GST_SEEK_FLAG_KEY_UNIT)},
{(GstEventType) 0, (GstEventFlag) 0}
};
return masks;
}
static gboolean
gst_matroska_demux_handle_src_event (GstPad * pad, GstEvent * event)
{
GstMatroskaDemux *demux = GST_MATROSKA_DEMUX (gst_pad_get_parent (pad));
gboolean res = TRUE;
switch (GST_EVENT_TYPE (event)) {
case GST_EVENT_SEEK_SEGMENT:
case GST_EVENT_SEEK:
return gst_matroska_demux_send_event (GST_ELEMENT (demux), event);
/* events we don't need to handle */
case GST_EVENT_NAVIGATION:
break;
default:
GST_WARNING ("Unhandled event of type %d", GST_EVENT_TYPE (event));
res = FALSE;
break;
}
gst_event_unref (event);
return res;
}
static gboolean
gst_matroska_demux_handle_seek_event (GstMatroskaDemux * demux)
{
GstEbmlRead *ebml = GST_EBML_READ (demux);
GstMatroskaIndex *entry = gst_matroskademux_seek (demux);
GstEvent *event;
guint i;
if (!entry)
return FALSE;
/* seek (relative to segment) */
if (!(event = gst_ebml_read_seek (ebml, entry->pos + demux->segment_start)))
return FALSE;
gst_event_unref (event); /* byte - we want time */
event =
gst_event_new_discontinuous (FALSE, GST_FORMAT_TIME, entry->time,
GST_FORMAT_UNDEFINED);
/* forward to all src pads */
for (i = 0; i < demux->num_streams; i++) {
if (GST_PAD_IS_USABLE (demux->src[i]->pad)) {
gst_event_ref (event);
gst_pad_push (demux->src[i]->pad, GST_DATA (event));
}
}
gst_event_unref (event);
return TRUE;
}
static gboolean
gst_matroska_demux_init_stream (GstMatroskaDemux * demux)
{
GstEbmlRead *ebml = GST_EBML_READ (demux);
guint32 id;
gchar *doctype;
guint version;
if (!gst_ebml_read_header (ebml, &doctype, &version))
return FALSE;
if (!doctype || strcmp (doctype, "matroska") != 0) {
GST_ELEMENT_ERROR (demux, STREAM, WRONG_TYPE, (NULL),
("Input is not a matroska stream (doctype=%s)",
doctype ? doctype : "none"));
g_free (doctype);
return FALSE;
}
g_free (doctype);
if (version > 1) {
GST_ELEMENT_ERROR (demux, STREAM, DEMUX, (NULL),
("Demuxer version (1) is too old to read stream version %d", version));
return FALSE;
}
/* find segment, must be the next element */
while (1) {
guint last_level;
if (!(id = gst_ebml_peek_id (ebml, &last_level)))
return FALSE;
if (id == GST_MATROSKA_ID_SEGMENT)
break;
/* oi! */
GST_WARNING ("Expected a Segment ID (0x%x), but received 0x%x!",
GST_MATROSKA_ID_SEGMENT, id);
if (!gst_ebml_read_skip (ebml))
return FALSE;
}
/* we now have a EBML segment */
if (!gst_ebml_read_master (ebml, &id))
return FALSE;
/* seeks are from the beginning of the segment,
* after the segment ID/length */
demux->segment_start = gst_bytestream_tell (ebml->bs);
return TRUE;
}
static gboolean
gst_matroska_demux_parse_tracks (GstMatroskaDemux * demux)
{
GstEbmlRead *ebml = GST_EBML_READ (demux);
gboolean res = TRUE;
guint32 id;
while (res) {
if (!(id = gst_ebml_peek_id (ebml, &demux->level_up))) {
res = FALSE;
break;
} else if (demux->level_up) {
demux->level_up--;
break;
}
switch (id) {
/* one track within the "all-tracks" header */
case GST_MATROSKA_ID_TRACKENTRY:
if (!gst_matroska_demux_add_stream (demux))
res = FALSE;
break;
default:
GST_WARNING ("Unknown entry 0x%x in track header", id);
/* fall-through */
case GST_EBML_ID_VOID:
if (!gst_ebml_read_skip (ebml))
res = FALSE;
break;
}
if (demux->level_up) {
demux->level_up--;
break;
}
}
return res;
}
static gboolean
gst_matroska_demux_parse_index (GstMatroskaDemux * demux, gboolean prevent_eos)
{
GstEbmlRead *ebml = GST_EBML_READ (demux);
gboolean res = TRUE;
guint32 id;
GstMatroskaIndex idx;
guint64 length = 0;
if (prevent_eos) {
length = gst_bytestream_length (ebml->bs);
}
while (res) {
/* We're an element that can be seeked to. If we are, then
* we want to prevent EOS, since that'll kill us. So we cache
* file size and seek until there, and don't call EOS upon os. */
if (prevent_eos && length == gst_bytestream_tell (ebml->bs)) {
res = FALSE;
break;
} else if (!(id = gst_ebml_peek_id (ebml, &demux->level_up))) {
res = FALSE;
break;
} else if (demux->level_up) {
demux->level_up--;
break;
}
switch (id) {
/* one single index entry ('point') */
case GST_MATROSKA_ID_POINTENTRY:
if (!gst_ebml_read_master (ebml, &id)) {
res = FALSE;
break;
}
/* in the end, we hope to fill one entry with a
* timestamp, a file position and a tracknum */
idx.pos = (guint64) - 1;
idx.time = (guint64) - 1;
idx.track = (guint16) - 1;
while (res) {
if (prevent_eos && length == gst_bytestream_tell (ebml->bs)) {
res = FALSE;
break;
} else if (!(id = gst_ebml_peek_id (ebml, &demux->level_up))) {
res = FALSE;
break;
} else if (demux->level_up) {
demux->level_up--;
break;
}
switch (id) {
/* one single index entry ('point') */
case GST_MATROSKA_ID_CUETIME:{
gint64 time;
if (!gst_ebml_read_uint (ebml, &id, &time)) {
res = FALSE;
break;
}
idx.time = time * demux->time_scale;
break;
}
/* position in the file + track to which it belongs */
case GST_MATROSKA_ID_CUETRACKPOSITION:
if (!gst_ebml_read_master (ebml, &id)) {
res = FALSE;
break;
}
while (res) {
if (prevent_eos && length == gst_bytestream_tell (ebml->bs)) {
res = FALSE;
break;
} else if (!(id = gst_ebml_peek_id (ebml, &demux->level_up))) {
res = FALSE;
break;
} else if (demux->level_up) {
demux->level_up--;
break;
}
switch (id) {
/* track number */
case GST_MATROSKA_ID_CUETRACK:{
guint64 num;
if (!gst_ebml_read_uint (ebml, &id, &num)) {
res = FALSE;
break;
}
idx.track = num;
break;
}
/* position in file */
case GST_MATROSKA_ID_CUECLUSTERPOSITION:{
guint64 num;
if (!gst_ebml_read_uint (ebml, &id, &num)) {
res = FALSE;
break;
}
idx.pos = num;
break;
}
default:
GST_WARNING ("Unknown entry 0x%x in CuesTrackPositions",
id);
/* fall-through */
case GST_EBML_ID_VOID:
if (!gst_ebml_read_skip (ebml))
res = FALSE;
break;
}
if (demux->level_up) {
demux->level_up--;
break;
}
}
break;
default:
GST_WARNING ("Unknown entry 0x%x in cuespoint index", id);
/* fall-through */
case GST_EBML_ID_VOID:
if (!gst_ebml_read_skip (ebml))
res = FALSE;
break;
}
if (demux->level_up) {
demux->level_up--;
break;
}
}
/* so let's see if we got what we wanted */
if (idx.pos != (guint64) - 1 &&
idx.time != (guint64) - 1 && idx.track != (guint16) - 1) {
if (demux->num_indexes % 32 == 0) {
/* re-allocate bigger index */
demux->index = g_renew (GstMatroskaIndex, demux->index,
demux->num_indexes + 32);
}
demux->index[demux->num_indexes].pos = idx.pos;
demux->index[demux->num_indexes].time = idx.time;
demux->index[demux->num_indexes].track = idx.track;
demux->num_indexes++;
}
break;
default:
GST_WARNING ("Unknown entry 0x%x in cues header", id);
/* fall-through */
case GST_EBML_ID_VOID:
if (!gst_ebml_read_skip (ebml))
res = FALSE;
break;
}
if (demux->level_up) {
demux->level_up--;
break;
}
}
return res;
}
static gboolean
gst_matroska_demux_parse_info (GstMatroskaDemux * demux)
{
GstEbmlRead *ebml = GST_EBML_READ (demux);
gboolean res = TRUE;
guint32 id;
while (res) {
if (!(id = gst_ebml_peek_id (ebml, &demux->level_up))) {
res = FALSE;
break;
} else if (demux->level_up) {
demux->level_up--;
break;
}
switch (id) {
/* cluster timecode */
case GST_MATROSKA_ID_TIMECODESCALE:{
guint64 num;
if (!gst_ebml_read_uint (ebml, &id, &num)) {
res = FALSE;
break;
}
demux->time_scale = num;
break;
}
case GST_MATROSKA_ID_DURATION:{
gdouble num;
if (!gst_ebml_read_float (ebml, &id, &num)) {
res = FALSE;
break;
}
demux->duration = num * demux->time_scale;
break;
}
case GST_MATROSKA_ID_WRITINGAPP:{
gchar *text;
if (!gst_ebml_read_utf8 (ebml, &id, &text)) {
res = FALSE;
break;
}
demux->writing_app = text;
break;
}
case GST_MATROSKA_ID_MUXINGAPP:{
gchar *text;
if (!gst_ebml_read_utf8 (ebml, &id, &text)) {
res = FALSE;
break;
}
demux->muxing_app = text;
break;
}
case GST_MATROSKA_ID_DATEUTC:{
gint64 time;
if (!gst_ebml_read_date (ebml, &id, &time)) {
res = FALSE;
break;
}
demux->created = time;
break;
}
default:
GST_WARNING ("Unknown entry 0x%x in info header", id);
/* fall-through */
case GST_EBML_ID_VOID:
if (!gst_ebml_read_skip (ebml))
res = FALSE;
break;
}
if (demux->level_up) {
demux->level_up--;
break;
}
}
return res;
}
static gboolean
gst_matroska_demux_parse_metadata (GstMatroskaDemux * demux,
gboolean prevent_eos)
{
GstEbmlRead *ebml = GST_EBML_READ (demux);
gboolean res = TRUE;
guint32 id;
guint64 length = 0;
struct
{
gchar *matroska_tagname;
gchar *gstreamer_tagname;
}
tag_conv[] =
{
{
GST_MATROSKA_TAG_ID_TITLE, GST_TAG_TITLE}
, {
GST_MATROSKA_TAG_ID_AUTHOR, GST_TAG_ARTIST}
, {
GST_MATROSKA_TAG_ID_ALBUM, GST_TAG_ALBUM}
, {
GST_MATROSKA_TAG_ID_COMMENTS, GST_TAG_COMMENT}
, {
GST_MATROSKA_TAG_ID_BITSPS, GST_TAG_BITRATE}
, {
GST_MATROSKA_TAG_ID_ENCODER, GST_TAG_ENCODER}
, {
GST_MATROSKA_TAG_ID_DATE, GST_TAG_DATE}
, {
GST_MATROSKA_TAG_ID_ISRC, GST_TAG_ISRC}
, {
GST_MATROSKA_TAG_ID_COPYRIGHT, GST_TAG_COPYRIGHT}
, {
NULL, NULL}
};
gint i;
gboolean have_tags = FALSE;
GstTagList *taglist = gst_tag_list_new ();
if (prevent_eos) {
length = gst_bytestream_length (ebml->bs);
}
while (res) {
/* We're an element that can be seeked to. If we are, then
* we want to prevent EOS, since that'll kill us. So we cache
* file size and seek until there, and don't call EOS upon os. */
if (prevent_eos && length == gst_bytestream_tell (ebml->bs)) {
res = FALSE;
break;
} else if (!(id = gst_ebml_peek_id (ebml, &demux->level_up))) {
res = FALSE;
break;
} else if (demux->level_up) {
demux->level_up--;
break;
}
switch (id) {
case GST_MATROSKA_ID_TAG:
if (!gst_ebml_read_master (ebml, &id)) {
res = FALSE;
break;
}
while (res) {
/* read all sub-entries */
if (prevent_eos && length == gst_bytestream_tell (ebml->bs)) {
res = FALSE;
break;
} else if (!(id = gst_ebml_peek_id (ebml, &demux->level_up))) {
res = FALSE;
break;
} else if (demux->level_up) {
demux->level_up--;
break;
}
switch (id) {
case GST_MATROSKA_ID_SIMPLETAG:{
gchar *tag = NULL, *value = NULL;
if (!gst_ebml_read_master (ebml, &id)) {
res = FALSE;
break;
}
while (res) {
/* read all sub-entries */
if (prevent_eos && length == gst_bytestream_tell (ebml->bs)) {
res = FALSE;
break;
} else if (!(id = gst_ebml_peek_id (ebml, &demux->level_up))) {
res = FALSE;
break;
} else if (demux->level_up) {
demux->level_up--;
break;
}
switch (id) {
case GST_MATROSKA_ID_TAGNAME:
g_free (tag);
res = gst_ebml_read_ascii (ebml, &id, &tag);
break;
case GST_MATROSKA_ID_TAGSTRING:
g_free (value);
res = gst_ebml_read_utf8 (ebml, &id, &value);
break;
default:
GST_WARNING ("Unknown entry 0x%x in metadata collection",
id);
/* fall-through */
case GST_EBML_ID_VOID:
if (!gst_ebml_read_skip (ebml))
res = FALSE;
break;
}
if (demux->level_up) {
demux->level_up--;
break;
}
}
if (tag && value) {
for (i = 0; tag_conv[i].matroska_tagname != NULL; i++) {
if (!strcmp (tag_conv[i].matroska_tagname, tag)) {
GValue src = { 0 }
, dest =
{
0};
const gchar *type = tag_conv[i].gstreamer_tagname;
GType dest_type = gst_tag_get_type (type);
g_value_init (&src, G_TYPE_STRING);
g_value_set_string (&src, value);
g_value_init (&dest, dest_type);
g_value_transform (&src, &dest);
g_value_unset (&src);
gst_tag_list_add_values (taglist, GST_TAG_MERGE_APPEND,
type, &dest, NULL);
g_value_unset (&dest);
have_tags = TRUE;
break;
}
}
}
g_free (tag);
g_free (value);
break;
}
default:
GST_WARNING ("Unknown entry 0x%x in metadata collection", id);
/* fall-through */
case GST_EBML_ID_VOID:
if (!gst_ebml_read_skip (ebml))
res = FALSE;
break;
}
if (demux->level_up) {
demux->level_up--;
break;
}
}
break;
default:
GST_WARNING ("Unknown entry 0x%x in metadata header", id);
/* fall-through */
case GST_EBML_ID_VOID:
if (!gst_ebml_read_skip (ebml))
res = FALSE;
break;
}
if (demux->level_up) {
demux->level_up--;
break;
}
}
if (have_tags) {
const GList *padlist;
/* let the world know about this wonderful thing */
for (padlist = gst_element_get_pad_list (GST_ELEMENT (ebml));
padlist != NULL; padlist = padlist->next) {
if (GST_PAD_IS_SRC (padlist->data) && GST_PAD_IS_USABLE (padlist->data)) {
gst_pad_push (GST_PAD (padlist->data),
GST_DATA (gst_event_new_tag (taglist)));
}
}
gst_element_found_tags (GST_ELEMENT (ebml), taglist);
} else {
gst_tag_list_free (taglist);
}
return res;
}
/*
* Read signed/unsigned "EBML" numbers.
* Return: number of bytes processed.
*/
static gint
gst_matroska_ebmlnum_uint (guint8 * data, guint size, guint64 * num)
{
gint len_mask = 0x80, read = 1, n = 1, num_ffs = 0;
guint64 total;
if (size <= 0) {
return -1;
}
total = data[0];
while (read <= 8 && !(total & len_mask)) {
read++;
len_mask >>= 1;
}
if (read > 8)
return -1;
if ((total &= (len_mask - 1)) == len_mask - 1)
num_ffs++;
if (size < read)
return -1;
while (n < read) {
if (data[n] == 0xff)
num_ffs++;
total = (total << 8) | data[n];
n++;
}
if (!total)
return -1;
if (read == num_ffs)
*num = G_MAXUINT64;
else
*num = total;
return read;
}
static gint
gst_matroska_ebmlnum_sint (guint8 * data, guint size, gint64 * num)
{
guint64 unum;
gint res;
/* read as unsigned number first */
if ((res = gst_matroska_ebmlnum_uint (data, size, &unum)) < 0)
return -1;
/* make signed */
if (unum == G_MAXUINT64)
*num = G_MAXINT64;
else
*num = unum - ((1 << ((7 * res) - 1)) - 1);
return res;
}
static gboolean
gst_matroska_demux_parse_blockgroup (GstMatroskaDemux * demux,
guint64 cluster_time)
{
GstEbmlRead *ebml = GST_EBML_READ (demux);
gboolean res = TRUE;
guint32 id;
while (res) {
if (!(id = gst_ebml_peek_id (ebml, &demux->level_up))) {
res = FALSE;
break;
} else if (demux->level_up) {
demux->level_up--;
break;
}
switch (id) {
/* one block inside the group. Note, block parsing is one
* of the harder things, so this code is a bit complicated.
* See http://www.matroska.org/ for documentation. */
case GST_MATROSKA_ID_BLOCK:{
GstBuffer *buf;
guint8 *data;
gint64 time;
guint size, *lace_size = NULL;
gint n, stream, flags, laces = 0;
guint64 num;
if (!gst_ebml_read_buffer (ebml, &id, &buf)) {
res = FALSE;
break;
}
data = GST_BUFFER_DATA (buf);
size = GST_BUFFER_SIZE (buf);
/* first byte(s): blocknum */
if ((n = gst_matroska_ebmlnum_uint (data, size, &num)) < 0) {
GST_ELEMENT_ERROR (demux, STREAM, DEMUX, (NULL), ("Data error"));
gst_buffer_unref (buf);
res = FALSE;
break;
}
data += n;
size -= n;
/* fetch stream from num */
stream = gst_matroska_demux_stream_from_num (demux, num);
if (size <= 3 || stream < 0 || stream >= demux->num_streams) {
gst_buffer_unref (buf);
GST_WARNING ("Invalid stream %d or size %u", stream, size);
break;
}
if (!GST_PAD_IS_USABLE (demux->src[stream]->pad)) {
gst_buffer_unref (buf);
break;
}
/* time (relative to cluster time) */
time = (GINT16_FROM_BE (*(gint16 *) data)) * demux->time_scale;
data += 2;
size -= 2;
flags = *(guint8 *) data;
data += 1;
size -= 1;
switch ((flags & 0x06) >> 1) {
case 0x0: /* no lacing */
laces = 1;
lace_size = g_new (gint, 1);
lace_size[0] = size;
break;
case 0x1: /* xiph lacing */
case 0x2: /* fixed-size lacing */
case 0x3: /* EBML lacing */
if (size == 0) {
res = FALSE;
break;
}
laces = (*(guint8 *) data) + 1;
data += 1;
size -= 1;
lace_size = g_new0 (gint, laces);
switch ((flags & 0x06) >> 1) {
case 0x1: /* xiph lacing */ {
guint temp, total = 0;
for (n = 0; res && n < laces - 1; n++) {
while (1) {
if (size == 0) {
res = FALSE;
break;
}
temp = *(guint8 *) data;
lace_size[n] += temp;
data += 1;
size -= 1;
if (temp != 0xff)
break;
}
total += lace_size[n];
}
lace_size[n] = size - total;
break;
}
case 0x2: /* fixed-size lacing */
for (n = 0; n < laces; n++)
lace_size[n] = size / laces;
break;
case 0x3: /* EBML lacing */ {
guint total;
if ((n = gst_matroska_ebmlnum_uint (data, size, &num)) < 0) {
GST_ELEMENT_ERROR (demux, STREAM, DEMUX, (NULL),
("Data error"));
res = FALSE;
break;
}
data += n;
size -= n;
total = lace_size[0] = num;
for (n = 1; res && n < laces - 1; n++) {
gint64 snum;
gint r;
if ((r = gst_matroska_ebmlnum_sint (data, size, &snum)) < 0) {
GST_ELEMENT_ERROR (demux, STREAM, DEMUX, (NULL),
("Data error"));
res = FALSE;
break;
}
data += r;
size -= r;
lace_size[n] = lace_size[n - 1] + snum;
total += lace_size[n];
}
lace_size[n] = size - total;
break;
}
}
break;
}
if (res) {
for (n = 0; n < laces; n++) {
GstBuffer *sub = gst_buffer_create_sub (buf,
GST_BUFFER_SIZE (buf) - size,
lace_size[n]);
if (cluster_time != GST_CLOCK_TIME_NONE) {
if (time < 0 && (-time) > cluster_time)
GST_BUFFER_TIMESTAMP (sub) = cluster_time;
else
GST_BUFFER_TIMESTAMP (sub) = cluster_time + time;
}
/* FIXME: duration */
gst_pad_push (demux->src[stream]->pad, GST_DATA (sub));
size -= lace_size[n];
}
}
g_free (lace_size);
gst_buffer_unref (buf);
break;
}
case GST_MATROSKA_ID_BLOCKDURATION:{
guint64 num;
if (!gst_ebml_read_uint (ebml, &id, &num)) {
res = FALSE;
break;
}
GST_WARNING ("FIXME: implement support for BlockDuration");
break;
}
case GST_MATROSKA_ID_REFERENCEBLOCK:{
/* FIXME: this segfaults
gint64 num;
if (!gst_ebml_read_sint (ebml, &id, &num)) {
res = FALSE;
break;
}
GST_WARNING ("FIXME: implement support for ReferenceBlock");
*/
if (!gst_ebml_read_skip (ebml))
res = FALSE;
break;
}
default:
GST_WARNING ("Unknown entry 0x%x in blockgroup data", id);
/* fall-through */
case GST_EBML_ID_VOID:
if (!gst_ebml_read_skip (ebml))
res = FALSE;
break;
}
if (demux->level_up) {
demux->level_up--;
break;
}
}
return res;
}
static gboolean
gst_matroska_demux_parse_cluster (GstMatroskaDemux * demux)
{
GstEbmlRead *ebml = GST_EBML_READ (demux);
gboolean res = TRUE;
guint32 id;
guint64 cluster_time = GST_CLOCK_TIME_NONE;
/* We seek after index/header parsing before doing a new
* buffer. So here. */
if (demux->seek_pending != GST_CLOCK_TIME_NONE) {
if (!gst_matroska_demux_handle_seek_event (demux))
return FALSE;
demux->seek_pending = GST_CLOCK_TIME_NONE;
}
while (res) {
if (!(id = gst_ebml_peek_id (ebml, &demux->level_up))) {
res = FALSE;
break;
} else if (demux->level_up) {
demux->level_up--;
break;
}
switch (id) {
/* cluster timecode */
case GST_MATROSKA_ID_CLUSTERTIMECODE:{
guint64 num;
if (!gst_ebml_read_uint (ebml, &id, &num)) {
res = FALSE;
break;
}
cluster_time = num * demux->time_scale;
break;
}
/* a group of blocks inside a cluster */
case GST_MATROSKA_ID_BLOCKGROUP:
if (!gst_ebml_read_master (ebml, &id)) {
res = FALSE;
break;
}
res = gst_matroska_demux_parse_blockgroup (demux, cluster_time);
break;
default:
GST_WARNING ("Unknown entry 0x%x in cluster data", id);
/* fall-through */
case GST_EBML_ID_VOID:
if (!gst_ebml_read_skip (ebml))
res = FALSE;
break;
}
if (demux->level_up) {
demux->level_up--;
break;
}
}
return res;
}
static gboolean
gst_matroska_demux_parse_contents (GstMatroskaDemux * demux)
{
GstEbmlRead *ebml = GST_EBML_READ (demux);
gboolean res = TRUE;
guint32 id;
while (res) {
if (!(id = gst_ebml_peek_id (ebml, &demux->level_up))) {
res = FALSE;
break;
} else if (demux->level_up) {
demux->level_up--;
break;
}
switch (id) {
case GST_MATROSKA_ID_SEEKENTRY:{
guint32 seek_id = 0;
guint64 seek_pos = (guint64) - 1, t;
if (!gst_ebml_read_master (ebml, &id)) {
res = FALSE;
break;
}
while (res) {
if (!(id = gst_ebml_peek_id (ebml, &demux->level_up))) {
res = FALSE;
break;
} else if (demux->level_up) {
demux->level_up--;
break;
}
switch (id) {
case GST_MATROSKA_ID_SEEKID:
if (!gst_ebml_read_uint (ebml, &id, &t))
res = FALSE;
seek_id = t;
break;
case GST_MATROSKA_ID_SEEKPOSITION:
if (!gst_ebml_read_uint (ebml, &id, &seek_pos))
res = FALSE;
break;
default:
GST_WARNING ("Unknown seekhead ID 0x%x", id);
/* fall-through */
case GST_EBML_ID_VOID:
if (!gst_ebml_read_skip (ebml))
res = FALSE;
break;
}
if (demux->level_up) {
demux->level_up--;
break;
}
}
if (!seek_id || seek_pos == (guint64) - 1) {
GST_WARNING ("Incomplete seekhead entry (0x%x/%"
G_GUINT64_FORMAT ")", seek_id, seek_pos);
break;
}
switch (seek_id) {
case GST_MATROSKA_ID_CUES:
case GST_MATROSKA_ID_TAGS:{
guint level_up = demux->level_up;
guint64 before_pos, length;
GstEbmlLevel *level;
GstEvent *event;
/* remember */
length = gst_bytestream_length (ebml->bs);
before_pos = gst_bytestream_tell (ebml->bs);
/* check for validity */
if (seek_pos + demux->segment_start + 12 >= length) {
g_warning ("Seekhead reference lies outside file!");
break;
}
/* seek */
if (!(event = gst_ebml_read_seek (ebml,
seek_pos + demux->segment_start)))
return FALSE;
gst_event_unref (event);
/* we don't want to lose our seekhead level, so we add
* a dummy. This is a crude hack. */
level = g_new (GstEbmlLevel, 1);
level->start = 0;
level->length = G_MAXUINT64;
ebml->level = g_list_append (ebml->level, level);
/* check ID */
if (!(id = gst_ebml_peek_id (ebml, &demux->level_up))) {
res = FALSE;
break;
}
if (id != seek_id) {
g_warning ("We looked for ID=0x%x but got ID=0x%x (pos=%llu)",
seek_id, id, seek_pos + demux->segment_start);
goto finish;
}
/* read master + parse */
switch (id) {
case GST_MATROSKA_ID_CUES:
if (!gst_ebml_read_master (ebml, &id))
res = FALSE;
else if (!gst_matroska_demux_parse_index (demux, TRUE) &&
gst_bytestream_length (ebml->bs) !=
gst_bytestream_tell (ebml->bs))
res = FALSE;
else
demux->index_parsed = TRUE;
break;
case GST_MATROSKA_ID_TAGS:
if (!gst_ebml_read_master (ebml, &id))
res = FALSE;
else if (!gst_matroska_demux_parse_metadata (demux, TRUE) &&
gst_bytestream_length (ebml->bs) !=
gst_bytestream_tell (ebml->bs))
res = FALSE;
else
demux->metadata_parsed = TRUE;
break;
}
if (!res)
break;
finish:
/* remove dummy level */
while (ebml->level) {
guint64 length;
level = g_list_last (ebml->level)->data;
ebml->level = g_list_remove (ebml->level, level);
length = level->length;
g_free (level);
if (length == G_MAXUINT64)
break;
}
/* seek back */
if (!(event = gst_ebml_read_seek (ebml, before_pos)))
return FALSE;
gst_event_unref (event);
demux->level_up = level_up;
break;
}
default:
GST_INFO ("Ignoring seekhead entry for ID=0x%x", seek_id);
break;
}
break;
}
default:
GST_WARNING ("Unknown seekhead ID 0x%x", id);
/* fall-through */
case GST_EBML_ID_VOID:
if (!gst_ebml_read_skip (ebml))
res = FALSE;
break;
}
if (demux->level_up) {
demux->level_up--;
break;
}
}
return res;
}
static gboolean
gst_matroska_demux_loop_stream (GstMatroskaDemux * demux)
{
GstEbmlRead *ebml = GST_EBML_READ (demux);
gboolean res = TRUE;
guint32 id;
/* we've found our segment, start reading the different contents in here */
while (res) {
if (!(id = gst_ebml_peek_id (ebml, &demux->level_up))) {
res = FALSE;
break;
} else if (demux->level_up) {
demux->level_up--;
break;
}
switch (id) {
/* stream info */
case GST_MATROSKA_ID_INFO:{
if (!gst_ebml_read_master (ebml, &id)) {
res = FALSE;
break;
}
res = gst_matroska_demux_parse_info (demux);
break;
}
/* track info headers */
case GST_MATROSKA_ID_TRACKS:{
if (!gst_ebml_read_master (ebml, &id)) {
res = FALSE;
break;
}
res = gst_matroska_demux_parse_tracks (demux);
break;
}
/* stream index */
case GST_MATROSKA_ID_CUES:{
if (!demux->index_parsed) {
if (!gst_ebml_read_master (ebml, &id)) {
res = FALSE;
break;
}
res = gst_matroska_demux_parse_index (demux, FALSE);
} else
res = gst_ebml_read_skip (ebml);
break;
}
/* metadata */
case GST_MATROSKA_ID_TAGS:{
if (!demux->index_parsed) {
if (!gst_ebml_read_master (ebml, &id)) {
res = FALSE;
break;
}
res = gst_matroska_demux_parse_metadata (demux, FALSE);
} else
res = gst_ebml_read_skip (ebml);
break;
}
/* file index (if seekable, seek to Cues/Tags to parse it) */
case GST_MATROSKA_ID_SEEKHEAD:{
if (!gst_ebml_read_master (ebml, &id)) {
res = FALSE;
break;
}
res = gst_matroska_demux_parse_contents (demux);
break;
}
case GST_MATROSKA_ID_CLUSTER:{
if (!gst_ebml_read_master (ebml, &id)) {
res = FALSE;
break;
}
/* The idea is that we parse one cluster per loop and
* then break out of the loop here. In the next call
* of the loopfunc, we will get back here with the
* next cluster. If an error occurs, we didn't
* actually push a buffer, but we still want to break
* out of the loop to handle a possible error. We'll
* get back here if it's recoverable. */
gst_matroska_demux_parse_cluster (demux);
demux->state = GST_MATROSKA_DEMUX_STATE_DATA;
res = FALSE;
break;
}
default:
GST_WARNING ("Unknown matroska file header ID 0x%x", id);
/* fall-through */
case GST_EBML_ID_VOID:
if (!gst_ebml_read_skip (ebml))
res = FALSE;
break;
}
if (demux->level_up) {
demux->level_up--;
break;
}
}
return res;
}
static void
gst_matroska_demux_loop (GstElement * element)
{
GstMatroskaDemux *demux = GST_MATROSKA_DEMUX (element);
/* first, if we're to start, let's actually get starting */
if (demux->state == GST_MATROSKA_DEMUX_STATE_START) {
if (!gst_matroska_demux_init_stream (demux)) {
return;
}
demux->state = GST_MATROSKA_DEMUX_STATE_HEADER;
}
gst_matroska_demux_loop_stream (demux);
}
static GstCaps *
gst_matroska_demux_video_caps (GstMatroskaTrackVideoContext * videocontext,
const gchar * codec_id, gpointer data, guint size, GstMatroskaDemux * demux)
{
GstMatroskaTrackContext *context = (GstMatroskaTrackContext *) videocontext;
GstCaps *caps = NULL;
if (!strcmp (codec_id, GST_MATROSKA_CODEC_ID_VIDEO_VFW_FOURCC)) {
gst_riff_strf_vids *vids = NULL;
if (data) {
char *codec_name = NULL;
GstTagList *list = gst_tag_list_new ();
vids = (gst_riff_strf_vids *) data;
/* assure size is big enough */
if (size < 24) {
GST_WARNING ("Too small BITMAPINFOHEADER (%d bytes)", size);
return NULL;
}
if (size < sizeof (gst_riff_strf_vids)) {
vids =
(gst_riff_strf_vids *) g_realloc (vids,
sizeof (gst_riff_strf_vids));
}
/* little-endian -> byte-order */
vids->size = GUINT32_FROM_LE (vids->size);
vids->width = GUINT32_FROM_LE (vids->width);
vids->height = GUINT32_FROM_LE (vids->height);
vids->planes = GUINT16_FROM_LE (vids->planes);
vids->bit_cnt = GUINT16_FROM_LE (vids->bit_cnt);
vids->compression = GUINT32_FROM_LE (vids->compression);
vids->image_size = GUINT32_FROM_LE (vids->image_size);
vids->xpels_meter = GUINT32_FROM_LE (vids->xpels_meter);
vids->ypels_meter = GUINT32_FROM_LE (vids->ypels_meter);
vids->num_colors = GUINT32_FROM_LE (vids->num_colors);
vids->imp_colors = GUINT32_FROM_LE (vids->imp_colors);
caps = gst_riff_create_video_caps (vids->compression, NULL, vids,
&codec_name);
gst_tag_list_add (list, GST_TAG_MERGE_APPEND, GST_TAG_VIDEO_CODEC,
codec_name, NULL);
if (GST_IS_ELEMENT (demux))
gst_element_found_tags (GST_ELEMENT (demux), list);
gst_tag_list_free (list);
if (codec_name)
g_free (codec_name);
} else {
caps = gst_riff_create_video_template_caps ();
}
} else if (!strcmp (codec_id, GST_MATROSKA_CODEC_ID_VIDEO_UNCOMPRESSED)) {
/* how nice, this is undocumented... */
if (videocontext != NULL) {
guint32 fourcc = 0;
switch (videocontext->fourcc) {
case GST_MAKE_FOURCC ('I', '4', '2', '0'):
case GST_MAKE_FOURCC ('Y', 'U', 'Y', '2'):
fourcc = videocontext->fourcc;
break;
default:
GST_DEBUG ("Unknown fourcc " GST_FOURCC_FORMAT,
GST_FOURCC_ARGS (videocontext->fourcc));
return NULL;
}
caps = gst_caps_new_simple ("video/x-raw-yuv",
"format", GST_TYPE_FOURCC, fourcc, NULL);
} else {
caps = gst_caps_from_string ("video/x-raw-yuv, "
"format = (fourcc) { I420, YUY2, YV12 }");
}
} else if (!strcmp (codec_id, GST_MATROSKA_CODEC_ID_VIDEO_MPEG4_SP)) {
caps = gst_caps_new_simple ("video/x-divx",
"divxversion", G_TYPE_INT, 4, NULL);
} else if (!strcmp (codec_id, GST_MATROSKA_CODEC_ID_VIDEO_MPEG4_ASP) ||
!strcmp (codec_id, GST_MATROSKA_CODEC_ID_VIDEO_MPEG4_AP)) {
caps = gst_caps_new_full (gst_structure_new ("video/x-divx",
"divxversion", G_TYPE_INT, 5, NULL),
gst_structure_new ("video/x-xvid", NULL),
gst_structure_new ("video/mpeg",
"mpegversion", G_TYPE_INT, 4,
"systemstream", G_TYPE_BOOLEAN, FALSE, NULL), NULL);
} else if (!strcmp (codec_id, GST_MATROSKA_CODEC_ID_VIDEO_MSMPEG4V3)) {
caps = gst_caps_new_full (gst_structure_new ("video/x-divx",
"divxversion", G_TYPE_INT, 3, NULL),
gst_structure_new ("video/x-msmpeg",
"msmpegversion", G_TYPE_INT, 43, NULL), NULL);
} else if (!strcmp (codec_id, GST_MATROSKA_CODEC_ID_VIDEO_MPEG1) ||
!strcmp (codec_id, GST_MATROSKA_CODEC_ID_VIDEO_MPEG2)) {
gint mpegversion = -1;
if (!strcmp (codec_id, GST_MATROSKA_CODEC_ID_VIDEO_MPEG1))
mpegversion = 1;
else if (!strcmp (codec_id, GST_MATROSKA_CODEC_ID_VIDEO_MPEG2))
mpegversion = 2;
else
g_assert (0);
caps = gst_caps_new_simple ("video/mpeg",
"systemstream", G_TYPE_BOOLEAN, FALSE,
"mpegversion", G_TYPE_INT, mpegversion, NULL);
} else if (!strcmp (codec_id, GST_MATROSKA_CODEC_ID_VIDEO_MJPEG)) {
caps = gst_caps_new_simple ("video/x-jpeg", NULL);
} else {
GST_WARNING ("Unknown codec '%s', cannot build Caps", codec_id);
return NULL;
}
if (caps != NULL) {
int i;
GstStructure *structure;
for (i = 0; i < gst_caps_get_size (caps); i++) {
structure = gst_caps_get_structure (caps, i);
if (videocontext != NULL) {
GST_DEBUG ("video size %dx%d, target display size %dx%d (any unit)",
videocontext->pixel_width,
videocontext->pixel_height,
videocontext->display_width, videocontext->display_height);
/* pixel width and height are the w and h of the video in pixels */
if (videocontext->pixel_width > 0 && videocontext->pixel_height > 0) {
gint w = videocontext->pixel_width;
gint h = videocontext->pixel_height;
gst_structure_set (structure,
"width", G_TYPE_INT, w, "height", G_TYPE_INT, h, NULL);
} else {
gst_structure_set (structure,
"width", GST_TYPE_INT_RANGE, 16, 4096,
"height", GST_TYPE_INT_RANGE, 16, 4096, NULL);
}
if (videocontext->display_width > 0 && videocontext->display_height > 0) {
int n, d;
/* calculate the pixel aspect ratio using the display and pixel w/h */
n = videocontext->display_width * videocontext->pixel_height;
d = videocontext->display_height * videocontext->pixel_width;
GST_DEBUG ("setting PAR to %d/%d", n, d);
gst_structure_set (structure, "pixel-aspect-ratio", GST_TYPE_FRACTION,
videocontext->display_width * videocontext->pixel_height,
videocontext->display_height * videocontext->pixel_width, NULL);
}
if (context->default_duration > 0) {
gfloat framerate = 1. * GST_SECOND / context->default_duration;
gst_structure_set (structure,
"framerate", G_TYPE_DOUBLE, framerate, NULL);
} else {
/* sort of a hack to get most codecs to support,
* even if the default_duration is missing */
gst_structure_set (structure, "framerate", G_TYPE_DOUBLE, 25.0, NULL);
}
} else {
gst_structure_set (structure,
"width", GST_TYPE_INT_RANGE, 16, 4096,
"height", GST_TYPE_INT_RANGE, 16, 4096,
"framerate", GST_TYPE_DOUBLE_RANGE, 0.0, G_MAXDOUBLE, NULL);
}
}
}
return caps;
}
static GstCaps *
gst_matroska_demux_audio_caps (GstMatroskaTrackAudioContext * audiocontext,
const gchar * codec_id, gpointer data, guint size, GstMatroskaDemux * demux)
{
GstMatroskaTrackContext *context = (GstMatroskaTrackContext *) audiocontext;
GstCaps *caps = NULL;
if (!strcmp (codec_id, GST_MATROSKA_CODEC_ID_AUDIO_MPEG1_L1) ||
!strcmp (codec_id, GST_MATROSKA_CODEC_ID_AUDIO_MPEG1_L2) ||
!strcmp (codec_id, GST_MATROSKA_CODEC_ID_AUDIO_MPEG1_L3)) {
gint layer = -1;
if (!strcmp (codec_id, GST_MATROSKA_CODEC_ID_AUDIO_MPEG1_L1))
layer = 1;
else if (!strcmp (codec_id, GST_MATROSKA_CODEC_ID_AUDIO_MPEG1_L2))
layer = 2;
else if (!strcmp (codec_id, GST_MATROSKA_CODEC_ID_AUDIO_MPEG1_L3))
layer = 3;
else
g_assert (0);
caps = gst_caps_new_simple ("audio/mpeg",
"mpegversion", G_TYPE_INT, 1, "layer", G_TYPE_INT, layer, NULL);
} else if (!strcmp (codec_id, GST_MATROSKA_CODEC_ID_AUDIO_PCM_INT_BE) ||
!strcmp (codec_id, GST_MATROSKA_CODEC_ID_AUDIO_PCM_INT_LE)) {
gint endianness = -1;
if (!strcmp (codec_id, GST_MATROSKA_CODEC_ID_AUDIO_PCM_INT_BE))
endianness = G_BIG_ENDIAN;
else if (!strcmp (codec_id, GST_MATROSKA_CODEC_ID_AUDIO_PCM_INT_LE))
endianness = G_LITTLE_ENDIAN;
else
g_assert (0);
if (context != NULL) {
caps = gst_caps_new_simple ("audio/x-raw-int",
"width", G_TYPE_INT, audiocontext->bitdepth,
"depth", G_TYPE_INT, audiocontext->bitdepth,
"signed", G_TYPE_BOOLEAN, audiocontext->bitdepth == 8, NULL);
} else {
caps = gst_caps_from_string ("audio/x-raw-int, "
"signed = (boolean) { TRUE, FALSE }, "
"depth = (int) { 8, 16 }, " "width = (int) { 8, 16 }");
}
gst_caps_set_simple (caps, "endianness", G_TYPE_INT, endianness, NULL);
} else if (!strcmp (codec_id, GST_MATROSKA_CODEC_ID_AUDIO_PCM_FLOAT)) {
caps = gst_caps_new_simple ("audio/x-raw-float",
"endianness", G_TYPE_INT, G_BYTE_ORDER,
"buffer-frames", GST_TYPE_INT_RANGE, 1, G_MAXINT, NULL);
if (audiocontext != NULL) {
gst_caps_set_simple (caps,
"width", G_TYPE_INT, audiocontext->bitdepth, NULL);
} else {
gst_caps_set_simple (caps, "width", GST_TYPE_INT_RANGE, 32, 64, NULL);
}
} else if (!strncmp (codec_id, GST_MATROSKA_CODEC_ID_AUDIO_AC3,
strlen (GST_MATROSKA_CODEC_ID_AUDIO_AC3)) ||
!strcmp (codec_id, GST_MATROSKA_CODEC_ID_AUDIO_DTS)) {
caps = gst_caps_new_simple ("audio/x-ac3", NULL);
} else if (!strcmp (codec_id, GST_MATROSKA_CODEC_ID_AUDIO_VORBIS)) {
caps = gst_caps_new_simple ("audio/x-vorbis", NULL);
} else if (!strcmp (codec_id, GST_MATROSKA_CODEC_ID_AUDIO_ACM)) {
gst_riff_strf_auds *auds = NULL;
if (data) {
char *codec_name = NULL;
GstTagList *list = gst_tag_list_new ();
auds = (gst_riff_strf_auds *) data;
/* little-endian -> byte-order */
auds->format = GUINT16_FROM_LE (auds->format);
auds->channels = GUINT16_FROM_LE (auds->channels);
auds->rate = GUINT32_FROM_LE (auds->rate);
auds->av_bps = GUINT32_FROM_LE (auds->av_bps);
auds->blockalign = GUINT16_FROM_LE (auds->blockalign);
auds->size = GUINT16_FROM_LE (auds->size);
caps = gst_riff_create_audio_caps (auds->format, NULL, auds, &codec_name);
gst_tag_list_add (list, GST_TAG_MERGE_APPEND, GST_TAG_AUDIO_CODEC,
codec_name, NULL);
if (GST_IS_ELEMENT (demux))
gst_element_found_tags (GST_ELEMENT (demux), list);
gst_tag_list_free (list);
if (codec_name)
g_free (codec_name);
} else {
caps = gst_riff_create_audio_template_caps ();
}
} else if (!strncmp (codec_id, GST_MATROSKA_CODEC_ID_AUDIO_MPEG2,
strlen (GST_MATROSKA_CODEC_ID_AUDIO_MPEG2)) ||
!strncmp (codec_id, GST_MATROSKA_CODEC_ID_AUDIO_MPEG4,
strlen (GST_MATROSKA_CODEC_ID_AUDIO_MPEG4))) {
gint mpegversion = -1;
if (!strncmp (codec_id, GST_MATROSKA_CODEC_ID_AUDIO_MPEG2,
strlen (GST_MATROSKA_CODEC_ID_AUDIO_MPEG2)))
mpegversion = 2;
else if (!strncmp (codec_id, GST_MATROSKA_CODEC_ID_AUDIO_MPEG4,
strlen (GST_MATROSKA_CODEC_ID_AUDIO_MPEG4)))
mpegversion = 4;
else
g_assert (0);
caps = gst_caps_new_simple ("audio/mpeg",
"mpegversion", G_TYPE_INT, mpegversion, NULL);
} else {
GST_WARNING ("Unknown codec '%s', cannot build Caps", codec_id);
g_print ("Codec=%s\n", codec_id);
return NULL;
}
if (caps != NULL) {
GstStructure *structure;
int i;
for (i = 0; i < gst_caps_get_size (caps); i++) {
structure = gst_caps_get_structure (caps, i);
if (audiocontext != NULL) {
if (audiocontext->samplerate > 0 && audiocontext->channels > 0) {
gst_structure_set (structure,
"channels", G_TYPE_INT, audiocontext->channels,
"rate", G_TYPE_INT, audiocontext->samplerate, NULL);
}
} else {
gst_structure_set (structure,
"channels", GST_TYPE_INT_RANGE, 1, 6,
"rate", GST_TYPE_INT_RANGE, 4000, 96000, NULL);
}
}
}
return caps;
}
static GstCaps *
gst_matroska_demux_complex_caps (GstMatroskaTrackComplexContext *
complexcontext, const gchar * codec_id, gpointer data, guint size)
{
GstCaps *caps = NULL;
//..
return caps;
}
static GstCaps *
gst_matroska_demux_subtitle_caps (GstMatroskaTrackSubtitleContext *
subtitlecontext, const gchar * codec_id, gpointer data, guint size)
{
GstCaps *caps = NULL;
//..
return caps;
}
static GstElementStateReturn
gst_matroska_demux_change_state (GstElement * element)
{
GstMatroskaDemux *demux = GST_MATROSKA_DEMUX (element);
switch (GST_STATE_TRANSITION (element)) {
case GST_STATE_PAUSED_TO_READY:
gst_matroska_demux_reset (GST_ELEMENT (demux));
break;
default:
break;
}
if (((GstElementClass *) parent_class)->change_state)
return ((GstElementClass *) parent_class)->change_state (element);
return GST_STATE_SUCCESS;
}
gboolean
gst_matroska_demux_plugin_init (GstPlugin * plugin)
{
gint i;
GstCaps *videosrccaps, *audiosrccaps, *subtitlesrccaps, *temp;
const gchar *video_id[] = {
GST_MATROSKA_CODEC_ID_VIDEO_VFW_FOURCC,
GST_MATROSKA_CODEC_ID_VIDEO_UNCOMPRESSED,
GST_MATROSKA_CODEC_ID_VIDEO_MPEG4_SP,
GST_MATROSKA_CODEC_ID_VIDEO_MPEG4_ASP,
GST_MATROSKA_CODEC_ID_VIDEO_MSMPEG4V3,
GST_MATROSKA_CODEC_ID_VIDEO_MPEG1,
GST_MATROSKA_CODEC_ID_VIDEO_MPEG2,
GST_MATROSKA_CODEC_ID_VIDEO_MJPEG,
/* TODO: Real/Quicktime */
/* FILLME */
NULL,
}, *audio_id[] =
{
GST_MATROSKA_CODEC_ID_AUDIO_MPEG1_L1,
GST_MATROSKA_CODEC_ID_AUDIO_MPEG1_L2,
GST_MATROSKA_CODEC_ID_AUDIO_MPEG1_L3,
GST_MATROSKA_CODEC_ID_AUDIO_PCM_INT_BE,
GST_MATROSKA_CODEC_ID_AUDIO_PCM_INT_LE,
GST_MATROSKA_CODEC_ID_AUDIO_PCM_FLOAT,
GST_MATROSKA_CODEC_ID_AUDIO_AC3,
GST_MATROSKA_CODEC_ID_AUDIO_ACM,
GST_MATROSKA_CODEC_ID_AUDIO_VORBIS,
GST_MATROSKA_CODEC_ID_AUDIO_MPEG2, GST_MATROSKA_CODEC_ID_AUDIO_MPEG4,
/* TODO: AC3-9/10, Real, Musepack, Quicktime */
/* FILLME */
NULL,}
, *complex_id[] = {
/* FILLME */
NULL,}
, *subtitle_id[] = {
/* FILLME */
NULL,};
/* this filter needs the riff parser */
if (!gst_library_load ("gstbytestream") || !gst_library_load ("riff")) /* for fourcc stuff */
return FALSE;
/* video src template */
videosrccaps = gst_caps_new_empty ();
for (i = 0; video_id[i] != NULL; i++) {
temp = gst_matroska_demux_video_caps (NULL, video_id[i], NULL, 0, NULL);
gst_caps_append (videosrccaps, temp);
}
for (i = 0; complex_id[i] != NULL; i++) {
temp = gst_matroska_demux_complex_caps (NULL, video_id[i], NULL, 0);
gst_caps_append (videosrccaps, temp);
}
videosrctempl = gst_pad_template_new ("video_%02d",
GST_PAD_SRC, GST_PAD_SOMETIMES, videosrccaps);
audiosrccaps = gst_caps_new_empty ();
/* audio src template */
for (i = 0; audio_id[i] != NULL; i++) {
temp = gst_matroska_demux_audio_caps (NULL, audio_id[i], NULL, 0, NULL);
gst_caps_append (audiosrccaps, temp);
}
audiosrctempl = gst_pad_template_new ("audio_%02d",
GST_PAD_SRC, GST_PAD_SOMETIMES, audiosrccaps);
subtitlesrccaps = gst_caps_new_empty ();
/* subtitle src template */
for (i = 0; subtitle_id[i] != NULL; i++) {
temp = gst_matroska_demux_subtitle_caps (NULL, subtitle_id[i], NULL, 0);
gst_caps_append (subtitlesrccaps, temp);
}
subtitlesrctempl = gst_pad_template_new ("subtitle_%02d",
GST_PAD_SRC, GST_PAD_SOMETIMES, subtitlesrccaps);
/* create an elementfactory for the matroska_demux element */
if (!gst_element_register (plugin, "matroskademux",
GST_RANK_PRIMARY, GST_TYPE_MATROSKA_DEMUX))
return FALSE;
return TRUE;
}
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