/* GStreamer Matroska muxer/demuxer * (c) 2003 Ronald Bultje * * 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 #include /* For AVI compatibility mode... Who did that? */ #include #include #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 " }; 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) { 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) { gint w = 100 * videocontext->display_width / videocontext->pixel_width; gint h = 100 * videocontext->display_height / videocontext->pixel_height; gst_structure_set (structure, "pixel_width", G_TYPE_INT, w, "pixel_height", G_TYPE_INT, h, NULL); } else { gst_structure_set (structure, "pixel_width", G_TYPE_INT, 1, "pixel_height", G_TYPE_INT, 1, 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, "pixel_width", GST_TYPE_INT_RANGE, 0, 255, "pixel_height", GST_TYPE_INT_RANGE, 0, 255, "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; }