/* GStreamer Matroska muxer/demuxer * (c) 2003 Ronald Bultje * (c) 2006 Tim-Philipp Müller * * 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? */ /* and for fourcc stuff */ #include #include #include #ifdef HAVE_ZLIB #include #endif #include "matroska-demux.h" #include "matroska-ids.h" GST_DEBUG_CATEGORY_STATIC (matroskademux_debug); #define GST_CAT_DEFAULT matroskademux_debug enum { ARG_0, ARG_METADATA, ARG_STREAMINFO }; static GstStaticPadTemplate sink_templ = GST_STATIC_PAD_TEMPLATE ("sink", GST_PAD_SINK, GST_PAD_ALWAYS, GST_STATIC_CAPS ("video/x-matroska") ); static GstStaticPadTemplate audio_src_templ = GST_STATIC_PAD_TEMPLATE ("audio_%02d", GST_PAD_SRC, GST_PAD_SOMETIMES, GST_STATIC_CAPS ("ANY") ); static GstStaticPadTemplate video_src_templ = GST_STATIC_PAD_TEMPLATE ("video_%02d", GST_PAD_SRC, GST_PAD_SOMETIMES, GST_STATIC_CAPS ("ANY") ); static GstStaticPadTemplate subtitle_src_templ = GST_STATIC_PAD_TEMPLATE ("subtitle_%02d", GST_PAD_SRC, GST_PAD_SOMETIMES, GST_STATIC_CAPS ("text/plain; application/x-ssa; application/x-ass; " "application/x-usf; video/x-dvd-subpicture; " "application/x-subtitle-unknown") ); 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 (GstPad * pad); static gboolean gst_matroska_demux_element_send_event (GstElement * element, GstEvent * event); /* pad functions */ static gboolean gst_matroska_demux_sink_activate_pull (GstPad * sinkpad, gboolean active); static gboolean gst_matroska_demux_sink_activate (GstPad * sinkpad); static gboolean gst_matroska_demux_handle_seek_event (GstMatroskaDemux * demux, GstEvent * event); static gboolean gst_matroska_demux_handle_src_event (GstPad * pad, GstEvent * event); static const GstQueryType *gst_matroska_demux_get_src_query_types (GstPad * pad); static gboolean gst_matroska_demux_handle_src_query (GstPad * pad, GstQuery * query); static GstStateChangeReturn gst_matroska_demux_change_state (GstElement * element, GstStateChange transition); /* caps functions */ static GstCaps *gst_matroska_demux_video_caps (GstMatroskaTrackVideoContext * videocontext, const gchar * codec_id, gpointer data, guint size, gchar ** codec_name); static GstCaps *gst_matroska_demux_audio_caps (GstMatroskaTrackAudioContext * audiocontext, const gchar * codec_id, gpointer data, guint size, gchar ** codec_name); 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 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 const GstElementDetails gst_matroska_demux_details = GST_ELEMENT_DETAILS ("Matroska demuxer", "Codec/Demuxer", "Demuxes a Matroska Stream into video/audio/subtitles", "Ronald Bultje "); gst_element_class_add_pad_template (element_class, gst_static_pad_template_get (&video_src_templ)); gst_element_class_add_pad_template (element_class, gst_static_pad_template_get (&audio_src_templ)); gst_element_class_add_pad_template (element_class, gst_static_pad_template_get (&subtitle_src_templ)); 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); GST_DEBUG_CATEGORY_INIT (matroskademux_debug, "matroskademux", 0, "Matroska demuxer"); } static void gst_matroska_demux_class_init (GstMatroskaDemuxClass * klass) { GstElementClass *gstelement_class; gstelement_class = (GstElementClass *) klass; parent_class = g_type_class_peek_parent (klass); gstelement_class->change_state = GST_DEBUG_FUNCPTR (gst_matroska_demux_change_state); gstelement_class->send_event = GST_DEBUG_FUNCPTR (gst_matroska_demux_element_send_event); } static void gst_matroska_demux_init (GstMatroskaDemux * demux) { GstElementClass *klass = GST_ELEMENT_GET_CLASS (demux); gint i; demux->sinkpad = gst_pad_new_from_template (gst_element_class_get_pad_template (klass, "sink"), "sink"); gst_pad_set_activate_function (demux->sinkpad, GST_DEBUG_FUNCPTR (gst_matroska_demux_sink_activate)); gst_pad_set_activatepull_function (demux->sinkpad, GST_DEBUG_FUNCPTR (gst_matroska_demux_sink_activate_pull)); gst_element_add_pad (GST_ELEMENT (demux), demux->sinkpad); GST_EBML_READ (demux)->sinkpad = demux->sinkpad; /* initial stream no. */ for (i = 0; i < GST_MATROSKA_DEMUX_MAX_STREAMS; i++) { demux->src[i] = NULL; } demux->writing_app = NULL; demux->muxing_app = NULL; demux->index = NULL; /* finish off */ gst_matroska_demux_reset (GST_ELEMENT (demux)); } static void gst_matroska_track_free (GstMatroskaTrackContext * track) { g_free (track->codec_id); g_free (track->codec_name); g_free (track->name); g_free (track->language); g_free (track->codec_priv); if (track->encodings != NULL) { int i; for (i = 0; i < track->encodings->len; ++i) { GstMatroskaTrackEncoding *enc = &g_array_index (track->encodings, GstMatroskaTrackEncoding, i); g_free (enc->comp_settings); } g_array_free (track->encodings, TRUE); } g_free (track); } /* * Returns the aggregated GstFlowReturn. */ static GstFlowReturn gst_matroska_demux_combine_flows (GstMatroskaDemux * demux, GstMatroskaTrackContext * track, GstFlowReturn ret) { guint i; /* store the value */ track->last_flow = ret; /* any other error that is not-linked can be returned right away */ if (ret != GST_FLOW_NOT_LINKED) goto done; /* only return NOT_LINKED if all other pads returned NOT_LINKED */ for (i = 0; i < GST_MATROSKA_DEMUX_MAX_STREAMS; i++) { GstMatroskaTrackContext *ostream = demux->src[i]; if (ostream == NULL) continue; ret = ostream->last_flow; /* some other return value (must be SUCCESS but we can return * other values as well) */ if (ret != GST_FLOW_NOT_LINKED) goto done; } /* if we get here, all other pads were unlinked and we return * NOT_LINKED then */ done: GST_LOG_OBJECT (demux, "combined return %s", gst_flow_get_name (ret)); return ret; } 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); } gst_caps_replace (&demux->src[i]->caps, NULL); gst_matroska_track_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->created = G_MININT64; demux->metadata_parsed = FALSE; demux->index_parsed = FALSE; gst_segment_init (&demux->segment, GST_FORMAT_TIME); } 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 gint gst_matroska_demux_encoding_cmp (gconstpointer a, gconstpointer b) { const GstMatroskaTrackEncoding *enc_a; const GstMatroskaTrackEncoding *enc_b; enc_a = (const GstMatroskaTrackEncoding *) a; enc_b = (const GstMatroskaTrackEncoding *) b; return (gint) enc_b->order - (gint) enc_a->order; } static GstFlowReturn gst_matroska_demux_read_track_encodings (GstEbmlRead * ebml, GstMatroskaDemux * demux, GstMatroskaTrackContext * context) { GstFlowReturn ret; guint32 id; if ((ret = gst_ebml_read_master (ebml, &id)) != GST_FLOW_OK) return ret; context->encodings = g_array_sized_new (FALSE, FALSE, sizeof (GstMatroskaTrackEncoding), 1); while (ret == GST_FLOW_OK) { if ((ret = gst_ebml_peek_id (ebml, &demux->level_up, &id)) != GST_FLOW_OK) { break; } else if (demux->level_up > 0) { demux->level_up--; break; } switch (id) { case GST_MATROSKA_ID_CONTENTENCODING:{ GstMatroskaTrackEncoding enc = { 0, }; if ((ret = gst_ebml_read_master (ebml, &id)) != GST_FLOW_OK) { break; } while (ret == GST_FLOW_OK) { if ((ret = gst_ebml_peek_id (ebml, &demux->level_up, &id)) != GST_FLOW_OK) { break; } else if (demux->level_up > 0) { demux->level_up--; break; } switch (id) { case GST_MATROSKA_ID_CONTENTENCODINGORDER:{ guint64 num; if ((ret = gst_ebml_read_uint (ebml, &id, &num)) != GST_FLOW_OK) { break; } enc.order = num; break; } case GST_MATROSKA_ID_CONTENTENCODINGSCOPE:{ guint64 num; if ((ret = gst_ebml_read_uint (ebml, &id, &num)) != GST_FLOW_OK) { break; } if (num > 7) GST_WARNING ("Unknown scope value in contents encoding."); else enc.scope = num; break; } case GST_MATROSKA_ID_CONTENTENCODINGTYPE:{ guint64 num; if ((ret = gst_ebml_read_uint (ebml, &id, &num)) != GST_FLOW_OK) { break; } if (num > 1) GST_WARNING ("Unknown type value in contents encoding."); else enc.type = num; break; } case GST_MATROSKA_ID_CONTENTCOMPRESSION:{ if ((ret = gst_ebml_read_master (ebml, &id)) != GST_FLOW_OK) { break; } while (ret == GST_FLOW_OK) { if ((ret = gst_ebml_peek_id (ebml, &demux->level_up, &id)) != GST_FLOW_OK) { break; } else if (demux->level_up > 0) { demux->level_up--; break; } switch (id) { case GST_MATROSKA_ID_CONTENTCOMPALGO:{ guint64 num; if ((ret = gst_ebml_read_uint (ebml, &id, &num)) != GST_FLOW_OK) { break; } if (num > 3) GST_WARNING ("Unknown scope value in encoding compalgo."); else enc.comp_algo = num; break; } case GST_MATROSKA_ID_CONTENTCOMPSETTINGS:{ guint8 *data; guint64 size; if ((ret = gst_ebml_read_binary (ebml, &id, &data, &size)) != GST_FLOW_OK) { break; } enc.comp_settings = data; enc.comp_settings_length = size; break; } default: GST_WARNING ("Unknown track compression header entry 0x%x" " - ignoring", id); ret = gst_ebml_read_skip (ebml); break; } if (demux->level_up) { demux->level_up--; break; } } break; } case GST_MATROSKA_ID_CONTENTENCRYPTION: GST_WARNING ("Encrypted tracks not yet supported"); /* pass-through */ default: GST_WARNING ("Unknown track encoding header entry 0x%x - ignoring", id); ret = gst_ebml_read_skip (ebml); break; } if (demux->level_up) { demux->level_up--; break; } } g_array_append_val (context->encodings, enc); break; } default: GST_WARNING ("Unknown track encodings header entry 0x%x - ignoring", id); ret = gst_ebml_read_skip (ebml); break; } if (demux->level_up) { demux->level_up--; break; } } /* Sort encodings according to their order */ g_array_sort (context->encodings, gst_matroska_demux_encoding_cmp); return ret; } static GstFlowReturn 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; GstFlowReturn ret; guint32 id; GstTagList *list = NULL; gchar *codec = NULL; 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 */ context->default_duration = 0; context->pos = 0; context->set_discont = TRUE; context->last_flow = GST_FLOW_OK; demux->num_streams++; /* start with the master */ if ((ret = gst_ebml_read_master (ebml, &id)) != GST_FLOW_OK) return ret; /* try reading the trackentry headers */ while (ret == GST_FLOW_OK) { if ((ret = gst_ebml_peek_id (ebml, &demux->level_up, &id)) != GST_FLOW_OK) { 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 ((ret = gst_ebml_read_uint (ebml, &id, &num)) != GST_FLOW_OK) { break; } context->num = num; break; } /* track UID (unique identifier) */ case GST_MATROSKA_ID_TRACKUID:{ guint64 num; if ((ret = gst_ebml_read_uint (ebml, &id, &num)) != GST_FLOW_OK) { break; } context->uid = num; break; } /* track type (video, audio, combined, subtitle, etc.) */ case GST_MATROSKA_ID_TRACKTYPE:{ guint64 track_type; if ((ret = gst_ebml_read_uint (ebml, &id, &track_type)) != GST_FLOW_OK) { break; } if (context->type != 0 && context->type != track_type) { GST_WARNING ("More than one tracktype defined in a trackentry - skipping"); break; } /* ok, so we're actually going to reallocate this thing */ switch (track_type) { case GST_MATROSKA_TRACK_TYPE_VIDEO: gst_matroska_track_init_video_context (&context); break; case GST_MATROSKA_TRACK_TYPE_AUDIO: gst_matroska_track_init_audio_context (&context); break; case GST_MATROSKA_TRACK_TYPE_COMPLEX: gst_matroska_track_init_complex_context (&context); break; case GST_MATROSKA_TRACK_TYPE_SUBTITLE: gst_matroska_track_init_subtitle_context (&context); break; case GST_MATROSKA_TRACK_TYPE_LOGO: case GST_MATROSKA_TRACK_TYPE_CONTROL: default: GST_WARNING ("Unknown or unsupported track type %" G_GUINT64_FORMAT, track_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 (!gst_matroska_track_init_video_context (&context)) { GST_WARNING ("trackvideo EBML entry in non-video track - ignoring track"); ret = GST_FLOW_ERROR; break; } else if ((ret = gst_ebml_read_master (ebml, &id)) != GST_FLOW_OK) { break; } videocontext = (GstMatroskaTrackVideoContext *) context; demux->src[demux->num_streams - 1] = context; while (ret == GST_FLOW_OK) { if ((ret = gst_ebml_peek_id (ebml, &demux->level_up, &id)) != GST_FLOW_OK) { 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 ((ret = gst_ebml_read_uint (ebml, &id, &num)) != GST_FLOW_OK) { break; } context->default_duration = num; break; } /* video framerate */ case GST_MATROSKA_ID_VIDEOFRAMERATE:{ gdouble num; if ((ret = gst_ebml_read_float (ebml, &id, &num)) != GST_FLOW_OK) { break; } if (num != 0.0) { context->default_duration = gst_gdouble_to_guint64 ((gdouble) GST_SECOND / num); videocontext->default_fps = num; } break; } /* width of the size to display the video at */ case GST_MATROSKA_ID_VIDEODISPLAYWIDTH:{ guint64 num; if ((ret = gst_ebml_read_uint (ebml, &id, &num)) != GST_FLOW_OK) { 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 ((ret = gst_ebml_read_uint (ebml, &id, &num)) != GST_FLOW_OK) { 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 ((ret = gst_ebml_read_uint (ebml, &id, &num)) != GST_FLOW_OK) { 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 ((ret = gst_ebml_read_uint (ebml, &id, &num)) != GST_FLOW_OK) { 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 ((ret = gst_ebml_read_uint (ebml, &id, &num)) != GST_FLOW_OK) { 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 ((ret = gst_ebml_read_uint (ebml, &id, &num)) != GST_FLOW_OK) { 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 ((ret = gst_ebml_read_uint (ebml, &id, &num)) != GST_FLOW_OK) { 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 ((ret = gst_ebml_read_uint (ebml, &id, &num)) != GST_FLOW_OK) { break; } videocontext->fourcc = num; break; } default: GST_WARNING ("Unknown video track header entry 0x%x - ignoring", id); /* pass-through */ case GST_EBML_ID_VOID: ret = gst_ebml_read_skip (ebml); break; } if (demux->level_up) { demux->level_up--; break; } } break; } /* tracktype specific stuff for audio */ case GST_MATROSKA_ID_TRACKAUDIO:{ GstMatroskaTrackAudioContext *audiocontext; if (!gst_matroska_track_init_audio_context (&context)) { GST_WARNING ("trackaudio EBML entry in non-audio track - ignoring track"); ret = GST_FLOW_ERROR; break; } else if ((ret = gst_ebml_read_master (ebml, &id)) != GST_FLOW_OK) { break; } audiocontext = (GstMatroskaTrackAudioContext *) context; demux->src[demux->num_streams - 1] = context; while (ret == GST_FLOW_OK) { if ((ret = gst_ebml_peek_id (ebml, &demux->level_up, &id)) != GST_FLOW_OK) { break; } else if (demux->level_up > 0) { demux->level_up--; break; } switch (id) { /* samplerate */ case GST_MATROSKA_ID_AUDIOSAMPLINGFREQ:{ gdouble num; if ((ret = gst_ebml_read_float (ebml, &id, &num)) != GST_FLOW_OK) { break; } audiocontext->samplerate = num; break; } /* bitdepth */ case GST_MATROSKA_ID_AUDIOBITDEPTH:{ guint64 num; if ((ret = gst_ebml_read_uint (ebml, &id, &num)) != GST_FLOW_OK) { break; } audiocontext->bitdepth = num; break; } /* channels */ case GST_MATROSKA_ID_AUDIOCHANNELS:{ guint64 num; if ((ret = gst_ebml_read_uint (ebml, &id, &num)) != GST_FLOW_OK) { break; } audiocontext->channels = num; break; } default: GST_WARNING ("Unknown audio track header entry 0x%x - ignoring", id); /* pass-through */ case GST_EBML_ID_VOID: ret = gst_ebml_read_skip (ebml); break; } if (demux->level_up) { demux->level_up--; break; } } break; } /* codec identifier */ case GST_MATROSKA_ID_CODECID:{ gchar *text; if ((ret = gst_ebml_read_ascii (ebml, &id, &text)) != GST_FLOW_OK) { break; } context->codec_id = text; break; } /* codec private data */ case GST_MATROSKA_ID_CODECPRIVATE:{ guint8 *data; guint64 size; if ((ret = gst_ebml_read_binary (ebml, &id, &data, &size)) != GST_FLOW_OK) { break; } context->codec_priv = data; context->codec_priv_size = size; GST_LOG_OBJECT (demux, "%u bytes of codec private data", (guint) size); break; } /* name of the codec */ case GST_MATROSKA_ID_CODECNAME:{ gchar *text; if ((ret = gst_ebml_read_utf8 (ebml, &id, &text)) != GST_FLOW_OK) { break; } context->codec_name = text; break; } /* name of this track */ case GST_MATROSKA_ID_TRACKNAME:{ gchar *text; if ((ret = gst_ebml_read_utf8 (ebml, &id, &text)) != GST_FLOW_OK) { break; } context->name = text; GST_LOG ("stream %d: trackname=%s", context->index, text); break; } /* language (matters for audio/subtitles, mostly) */ case GST_MATROSKA_ID_TRACKLANGUAGE:{ gchar *text; if ((ret = gst_ebml_read_utf8 (ebml, &id, &text)) != GST_FLOW_OK) { break; } context->language = text; GST_LOG ("stream %d: language=%s", context->index, text); /* fre-ca => fre */ if (strlen (context->language) >= 4 && context->language[3] == '-') context->language[3] = '\0'; break; } /* whether this is actually used */ case GST_MATROSKA_ID_TRACKFLAGENABLED:{ guint64 num; if ((ret = gst_ebml_read_uint (ebml, &id, &num)) != GST_FLOW_OK) { 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 ((ret = gst_ebml_read_uint (ebml, &id, &num)) != GST_FLOW_OK) { 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 ((ret = gst_ebml_read_uint (ebml, &id, &num)) != GST_FLOW_OK) { 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 ((ret = gst_ebml_read_uint (ebml, &id, &num)) != GST_FLOW_OK) { break; } context->default_duration = num; break; } case GST_MATROSKA_ID_CONTENTENCODINGS:{ ret = gst_matroska_demux_read_track_encodings (ebml, demux, context); 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: ret = gst_ebml_read_skip (ebml); break; } if (demux->level_up) { demux->level_up--; break; } } if (context->type == 0 || context->codec_id == NULL || ret != GST_FLOW_OK) { if (ret == GST_FLOW_OK) GST_WARNING ("Unknown stream/codec in track entry header"); demux->num_streams--; demux->src[demux->num_streams] = NULL; if (context) { gst_matroska_track_free (context); } return ret; } /* 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, &codec); if (codec) { list = gst_tag_list_new (); gst_tag_list_add (list, GST_TAG_MERGE_REPLACE, GST_TAG_VIDEO_CODEC, codec, NULL); g_free (codec); } 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, &codec); if (codec) { list = gst_tag_list_new (); gst_tag_list_add (list, GST_TAG_MERGE_REPLACE, GST_TAG_AUDIO_CODEC, codec, NULL); g_free (codec); } 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_not_reached (); } if ((context->language == NULL || *context->language == '\0') && (context->type == GST_MATROSKA_TRACK_TYPE_AUDIO || context->type == GST_MATROSKA_TRACK_TYPE_SUBTITLE)) { GST_LOG ("stream %d: language=eng (assuming default)", context->index); context->language = g_strdup ("eng"); } if (context->language) { if (!list) list = gst_tag_list_new (); gst_tag_list_add (list, GST_TAG_MERGE_REPLACE, GST_TAG_LANGUAGE_CODE, context->language, NULL); } if (caps == NULL) { GST_WARNING_OBJECT (demux, "could not determine caps for stream with " "codec_id='%s'", context->codec_id); switch (context->type) { case GST_MATROSKA_TRACK_TYPE_VIDEO: caps = gst_caps_new_simple ("video/x-unknown", NULL); break; case GST_MATROSKA_TRACK_TYPE_AUDIO: caps = gst_caps_new_simple ("audio/x-unknown", NULL); break; case GST_MATROSKA_TRACK_TYPE_SUBTITLE: caps = gst_caps_new_simple ("application/x-subtitle-unknown", NULL); break; case GST_MATROSKA_TRACK_TYPE_COMPLEX: default: caps = gst_caps_new_simple ("application/x-matroska-unknown", NULL); break; } gst_caps_set_simple (caps, "codec-id", G_TYPE_STRING, context->codec_id, NULL); } /* the pad in here */ context->pad = gst_pad_new_from_template (templ, padname); context->caps = caps; gst_pad_set_event_function (context->pad, GST_DEBUG_FUNCPTR (gst_matroska_demux_handle_src_event)); gst_pad_set_query_type_function (context->pad, GST_DEBUG_FUNCPTR (gst_matroska_demux_get_src_query_types)); gst_pad_set_query_function (context->pad, GST_DEBUG_FUNCPTR (gst_matroska_demux_handle_src_query)); GST_INFO_OBJECT (demux, "Adding pad '%s' with caps %" GST_PTR_FORMAT, padname, caps); context->pending_tags = list; gst_pad_use_fixed_caps (context->pad); gst_pad_set_caps (context->pad, context->caps); gst_pad_set_active (context->pad, TRUE); gst_element_add_pad (GST_ELEMENT (demux), context->pad); g_free (padname); /* tadaah! */ return ret; } static const GstQueryType * gst_matroska_demux_get_src_query_types (GstPad * pad) { static const GstQueryType query_types[] = { GST_QUERY_POSITION, GST_QUERY_DURATION, 0 }; return query_types; } static gboolean gst_matroska_demux_handle_src_query (GstPad * pad, GstQuery * query) { GstMatroskaDemux *demux; gboolean res = FALSE; demux = GST_MATROSKA_DEMUX (gst_pad_get_parent (pad)); switch (GST_QUERY_TYPE (query)) { case GST_QUERY_POSITION: { GstFormat format; gst_query_parse_position (query, &format, NULL); if (format != GST_FORMAT_TIME) { GST_DEBUG ("only query position on TIME is supported"); break; } GST_OBJECT_LOCK (demux); gst_query_set_position (query, GST_FORMAT_TIME, demux->segment.last_stop); GST_OBJECT_UNLOCK (demux); res = TRUE; break; } case GST_QUERY_DURATION: { GstFormat format; gst_query_parse_duration (query, &format, NULL); if (format != GST_FORMAT_TIME) { GST_DEBUG ("only query duration on TIME is supported"); break; } GST_OBJECT_LOCK (demux); gst_query_set_duration (query, GST_FORMAT_TIME, demux->segment.duration); GST_OBJECT_UNLOCK (demux); res = TRUE; break; } default: res = gst_pad_query_default (pad, query); break; } gst_object_unref (demux); return res; } static GstMatroskaIndex * gst_matroskademux_do_index_seek (GstMatroskaDemux * demux, gint64 seek_pos, gint64 segment_stop, gboolean keyunit) { guint entry; guint n = 0; if (!demux->num_indexes) return NULL; if (keyunit) { /* find index entry closest to the requested position */ entry = 0; for (n = 0; n < demux->num_indexes; ++n) { gdouble d_entry, d_this; d_entry = fabs (gst_guint64_to_gdouble (demux->index[entry].time) - gst_guint64_to_gdouble (seek_pos)); d_this = fabs (gst_guint64_to_gdouble (demux->index[n].time) - gst_guint64_to_gdouble (seek_pos)); if (d_this < d_entry && (demux->index[n].time < segment_stop || segment_stop == -1)) { entry = n; } } } else { /* find index entry at or before the requested position */ entry = demux->num_indexes - 1; while (n < demux->num_indexes - 1) { if ((demux->index[n].time <= seek_pos) && (demux->index[n + 1].time > seek_pos)) { entry = n; break; } n++; } } return &demux->index[entry]; } /* takes ownership of the passed event! */ static gboolean gst_matroska_demux_send_event (GstMatroskaDemux * demux, GstEvent * event) { gboolean ret = TRUE; gint i; g_return_val_if_fail (event != NULL, FALSE); GST_DEBUG_OBJECT (demux, "Sending event of type %s to all source pads", GST_EVENT_TYPE_NAME (event)); for (i = 0; i < demux->num_streams; i++) { GstMatroskaTrackContext *stream; stream = demux->src[i]; gst_event_ref (event); gst_pad_push_event (stream->pad, event); if (stream->pending_tags) { gst_element_found_tags_for_pad (GST_ELEMENT (demux), stream->pad, stream->pending_tags); stream->pending_tags = NULL; } } gst_event_unref (event); return ret; } static gboolean gst_matroska_demux_element_send_event (GstElement * element, GstEvent * event) { GstMatroskaDemux *demux = GST_MATROSKA_DEMUX (element); gboolean res; g_return_val_if_fail (event != NULL, FALSE); if (GST_EVENT_TYPE (event) == GST_EVENT_SEEK) { res = gst_matroska_demux_handle_seek_event (demux, event); } else { GST_WARNING ("Unhandled event of type %s", GST_EVENT_TYPE_NAME (event)); res = FALSE; } gst_event_unref (event); return res; } static gboolean gst_matroska_demux_handle_seek_event (GstMatroskaDemux * demux, GstEvent * event) { GstMatroskaIndex *entry; GstSeekFlags flags; GstSeekType cur_type, stop_type; GstFormat format; GstEvent *newsegment_event; gboolean flush, keyunit; gdouble rate; gint64 cur, stop; gint64 segment_start, segment_stop; gint i; gst_event_parse_seek (event, &rate, &format, &flags, &cur_type, &cur, &stop_type, &stop); /* we can only seek on time */ if (format != GST_FORMAT_TIME) { GST_DEBUG ("Can only seek on TIME"); return FALSE; } /* cannot yet do backwards playback */ if (rate <= 0.0) { GST_DEBUG ("Can only seek with positive rate"); return FALSE; } /* check sanity before we start flushing and all that */ if (cur_type == GST_SEEK_TYPE_SET) { GST_OBJECT_LOCK (demux); if (!gst_matroskademux_do_index_seek (demux, cur, -1, FALSE)) { GST_DEBUG ("No matching seek entry in index"); GST_OBJECT_UNLOCK (demux); return FALSE; } GST_DEBUG ("Seek position looks sane"); GST_OBJECT_UNLOCK (demux); } flush = !!(flags & GST_SEEK_FLAG_FLUSH); keyunit = !!(flags & GST_SEEK_FLAG_KEY_UNIT); if (flush) { GST_DEBUG ("Starting flush"); gst_pad_push_event (demux->sinkpad, gst_event_new_flush_start ()); gst_matroska_demux_send_event (demux, gst_event_new_flush_start ()); } else { gst_pad_pause_task (demux->sinkpad); } /* now grab the stream lock so that streaming cannot continue, for * non flushing seeks when the element is in PAUSED this could block * forever. */ GST_PAD_STREAM_LOCK (demux->sinkpad); GST_OBJECT_LOCK (demux); /* if nothing configured, play complete file */ if (!GST_CLOCK_TIME_IS_VALID (cur)) cur = 0; if (!GST_CLOCK_TIME_IS_VALID (stop)) stop = demux->segment.duration; /* prevent some calculations and comparisons involving INVALID */ segment_start = demux->segment.start; segment_stop = demux->segment.stop; if (!GST_CLOCK_TIME_IS_VALID (segment_start)) segment_start = 0; if (!GST_CLOCK_TIME_IS_VALID (segment_stop)) segment_stop = demux->segment.duration; if (cur_type == GST_SEEK_TYPE_SET) segment_start = cur; else if (cur_type == GST_SEEK_TYPE_CUR) segment_start += cur; if (stop_type == GST_SEEK_TYPE_SET) segment_stop = stop; else if (stop_type == GST_SEEK_TYPE_CUR) segment_stop += stop; segment_start = CLAMP (segment_start, 0, demux->segment.duration); segment_stop = CLAMP (segment_stop, 0, demux->segment.duration); GST_DEBUG ("New segment positions: %" GST_TIME_FORMAT "-%" GST_TIME_FORMAT, GST_TIME_ARGS (segment_start), GST_TIME_ARGS (segment_stop)); entry = gst_matroskademux_do_index_seek (demux, segment_start, segment_stop, keyunit); if (!entry) { GST_DEBUG ("No matching seek entry in index"); goto seek_error; } /* seek (relative to matroska segment) */ if (gst_ebml_read_seek (GST_EBML_READ (demux), entry->pos + demux->ebml_segment_start) != GST_FLOW_OK) { GST_DEBUG ("Failed to seek to offset %" G_GUINT64_FORMAT, entry->pos + demux->ebml_segment_start); goto seek_error; } GST_DEBUG ("Seeked to offset %" G_GUINT64_FORMAT, entry->pos + demux->ebml_segment_start); if (keyunit) { GST_DEBUG ("seek to key unit, adjusting segment start to %" GST_TIME_FORMAT, GST_TIME_ARGS (entry->time)); segment_start = entry->time; } GST_DEBUG ("Committing new seek segment"); demux->segment.rate = rate; demux->segment.flags = flags; demux->segment.start = segment_start; demux->segment.stop = segment_stop; GST_OBJECT_UNLOCK (demux); /* notify start of new segment */ if (demux->segment.flags & GST_SEEK_FLAG_SEGMENT) { GstMessage *msg; msg = gst_message_new_segment_start (GST_OBJECT (demux), GST_FORMAT_TIME, demux->segment.start); gst_element_post_message (GST_ELEMENT (demux), msg); } newsegment_event = gst_event_new_new_segment (FALSE, rate, GST_FORMAT_TIME, segment_start, segment_stop, segment_start); if (flush) { GST_DEBUG ("Stopping flush"); gst_pad_push_event (demux->sinkpad, gst_event_new_flush_stop ()); gst_matroska_demux_send_event (demux, gst_event_new_flush_stop ()); } else if (demux->segment_running) { /* FIXME, the current segment was still running when we performed the * seek, we need to close the current segment */ GST_DEBUG ("Closing currently running segment"); } /* send newsegment event to all source pads and update the time */ gst_matroska_demux_send_event (demux, newsegment_event); for (i = 0; i < demux->num_streams; i++) { demux->src[i]->pos = entry->time; demux->src[i]->set_discont = TRUE; demux->src[i]->last_flow = GST_FLOW_OK; } demux->segment.last_stop = entry->time; /* restart our task since it might have been stopped when we did the * flush. */ demux->segment_running = TRUE; gst_pad_start_task (demux->sinkpad, (GstTaskFunction) gst_matroska_demux_loop, demux->sinkpad); /* streaming can continue now */ GST_PAD_STREAM_UNLOCK (demux->sinkpad); return TRUE; seek_error: { /* FIXME: shouldn't we either make it a real error or start the task * function again so that things can continue from where they left off? */ GST_DEBUG ("Got a seek error"); GST_OBJECT_UNLOCK (demux); GST_PAD_STREAM_UNLOCK (demux->sinkpad); return FALSE; } } 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: res = gst_matroska_demux_handle_seek_event (demux, event); break; /* events we don't need to handle */ case GST_EVENT_NAVIGATION: case GST_EVENT_QOS: res = FALSE; break; default: GST_WARNING ("Unhandled %s event, dropped", GST_EVENT_TYPE_NAME (event)); res = FALSE; break; } gst_object_unref (demux); gst_event_unref (event); return res; } static GstFlowReturn gst_matroska_demux_init_stream (GstMatroskaDemux * demux) { GstEbmlRead *ebml = GST_EBML_READ (demux); guint32 id; gchar *doctype; guint version; GstFlowReturn ret; if ((ret = gst_ebml_read_header (ebml, &doctype, &version)) != GST_FLOW_OK) return ret; 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 GST_FLOW_ERROR; } g_free (doctype); if (version > 2) { GST_ELEMENT_ERROR (demux, STREAM, DEMUX, (NULL), ("Demuxer version (2) is too old to read stream version %d", version)); return GST_FLOW_ERROR; } /* find segment, must be the next element */ while (1) { guint last_level; if ((ret = gst_ebml_peek_id (ebml, &last_level, &id)) != GST_FLOW_OK) { GST_DEBUG_OBJECT (demux, "gst_ebml_peek_id() failed!"); return ret; } 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 ((ret = gst_ebml_read_skip (ebml)) != GST_FLOW_OK) return ret; } /* we now have a EBML segment */ if ((ret = gst_ebml_read_master (ebml, &id)) != GST_FLOW_OK) { GST_DEBUG_OBJECT (demux, "gst_ebml_read_master() failed!"); return ret; } /* seeks are from the beginning of the segment, * after the segment ID/length */ demux->ebml_segment_start = ebml->offset; return ret; } static GstFlowReturn gst_matroska_demux_parse_tracks (GstMatroskaDemux * demux) { GstEbmlRead *ebml = GST_EBML_READ (demux); GstFlowReturn ret = GST_FLOW_OK; guint32 id; while (ret == GST_FLOW_OK) { if ((ret = gst_ebml_peek_id (ebml, &demux->level_up, &id)) != GST_FLOW_OK) { break; } else if (demux->level_up) { demux->level_up--; break; } switch (id) { /* one track within the "all-tracks" header */ case GST_MATROSKA_ID_TRACKENTRY: ret = gst_matroska_demux_add_stream (demux); break; default: GST_WARNING ("Unknown entry 0x%x in track header", id); /* fall-through */ case GST_EBML_ID_VOID: ret = gst_ebml_read_skip (ebml); break; } if (demux->level_up) { demux->level_up--; break; } } return ret; } static GstFlowReturn gst_matroska_demux_parse_index_cuetrack (GstMatroskaDemux * demux, gboolean prevent_eos, GstMatroskaIndex * idx, guint64 length) { GstEbmlRead *ebml = GST_EBML_READ (demux); guint32 id; GstFlowReturn ret; if ((ret = gst_ebml_read_master (ebml, &id)) != GST_FLOW_OK) return ret; while (TRUE) { if (prevent_eos && length == ebml->offset) break; if ((ret = gst_ebml_peek_id (ebml, &demux->level_up, &id)) != GST_FLOW_OK) return ret; if (demux->level_up) { demux->level_up--; break; } switch (id) { /* track number */ case GST_MATROSKA_ID_CUETRACK: { guint64 num; if ((ret = gst_ebml_read_uint (ebml, &id, &num)) != GST_FLOW_OK) goto error; idx->track = num; break; } /* position in file */ case GST_MATROSKA_ID_CUECLUSTERPOSITION: { guint64 num; if ((ret = gst_ebml_read_uint (ebml, &id, &num)) != GST_FLOW_OK) goto error; idx->pos = num; break; } default: GST_WARNING ("Unknown entry 0x%x in CuesTrackPositions", id); /* fall-through */ case GST_EBML_ID_VOID: if ((ret = gst_ebml_read_skip (ebml)) != GST_FLOW_OK) goto error; break; } if (demux->level_up) { demux->level_up--; break; } } return ret; error: if (demux->level_up) demux->level_up--; return ret; } static GstFlowReturn gst_matroska_demux_parse_index_pointentry (GstMatroskaDemux * demux, gboolean prevent_eos, guint64 length) { GstEbmlRead *ebml = GST_EBML_READ (demux); GstMatroskaIndex idx; guint32 id; GstFlowReturn ret; if ((ret = gst_ebml_read_master (ebml, &id)) != GST_FLOW_OK) return ret; /* 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 (ret == GST_FLOW_OK) { if (prevent_eos && length == ebml->offset) break; if ((ret = gst_ebml_peek_id (ebml, &demux->level_up, &id)) != GST_FLOW_OK) return ret; if (demux->level_up) { demux->level_up--; break; } switch (id) { /* one single index entry ('point') */ case GST_MATROSKA_ID_CUETIME: { guint64 time; if ((ret = gst_ebml_read_uint (ebml, &id, &time)) == GST_FLOW_OK) { idx.time = time * demux->time_scale; } break; } /* position in the file + track to which it belongs */ case GST_MATROSKA_ID_CUETRACKPOSITION: { ret = gst_matroska_demux_parse_index_cuetrack (demux, prevent_eos, &idx, length); break; } default: GST_WARNING ("Unknown entry 0x%x in cuespoint index", id); /* fall-through */ case GST_EBML_ID_VOID: ret = gst_ebml_read_skip (ebml); 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); } GST_DEBUG_OBJECT (demux, "Index entry: pos=%" G_GUINT64_FORMAT ", time=%" GST_TIME_FORMAT ", track=%u", idx.pos, GST_TIME_ARGS (idx.time), (guint) idx.track); 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++; } return ret; } static GstFlowReturn gst_matroska_demux_parse_index (GstMatroskaDemux * demux, gboolean prevent_eos) { GstEbmlRead *ebml = GST_EBML_READ (demux); guint32 id; guint64 length = 0; GstFlowReturn ret = GST_FLOW_OK; if (prevent_eos) { length = gst_ebml_read_get_length (ebml); } while (ret == GST_FLOW_OK) { /* 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 == ebml->offset) break; if ((ret = gst_ebml_peek_id (ebml, &demux->level_up, &id)) != GST_FLOW_OK) return ret; if (demux->level_up) { demux->level_up--; break; } switch (id) { /* one single index entry ('point') */ case GST_MATROSKA_ID_POINTENTRY: ret = gst_matroska_demux_parse_index_pointentry (demux, prevent_eos, length); break; default: GST_WARNING ("Unknown entry 0x%x in cues header", id); /* fall-through */ case GST_EBML_ID_VOID: ret = gst_ebml_read_skip (ebml); break; } if (demux->level_up) { demux->level_up--; break; } } return ret; } static GstFlowReturn gst_matroska_demux_parse_info (GstMatroskaDemux * demux) { GstEbmlRead *ebml = GST_EBML_READ (demux); GstFlowReturn ret = GST_FLOW_OK; guint32 id; while (ret == GST_FLOW_OK) { if ((ret = gst_ebml_peek_id (ebml, &demux->level_up, &id)) != GST_FLOW_OK) { break; } else if (demux->level_up) { demux->level_up--; break; } switch (id) { /* cluster timecode */ case GST_MATROSKA_ID_TIMECODESCALE:{ guint64 num; if ((ret = gst_ebml_read_uint (ebml, &id, &num)) != GST_FLOW_OK) { break; } demux->time_scale = num; break; } case GST_MATROSKA_ID_DURATION:{ gdouble num; GstClockTime dur; if ((ret = gst_ebml_read_float (ebml, &id, &num)) != GST_FLOW_OK) { break; } dur = gst_gdouble_to_guint64 (num * gst_guint64_to_gdouble (demux->time_scale)); if (GST_CLOCK_TIME_IS_VALID (dur) && dur <= G_MAXINT64) demux->segment.duration = dur; break; } case GST_MATROSKA_ID_WRITINGAPP:{ gchar *text; if ((ret = gst_ebml_read_utf8 (ebml, &id, &text)) != GST_FLOW_OK) { break; } demux->writing_app = text; break; } case GST_MATROSKA_ID_MUXINGAPP:{ gchar *text; if ((ret = gst_ebml_read_utf8 (ebml, &id, &text)) != GST_FLOW_OK) { break; } demux->muxing_app = text; break; } case GST_MATROSKA_ID_DATEUTC:{ gint64 time; if ((ret = gst_ebml_read_date (ebml, &id, &time)) != GST_FLOW_OK) { break; } demux->created = time; break; } case GST_MATROSKA_ID_SEGMENTUID:{ /* TODO not yet implemented. */ ret = gst_ebml_read_skip (ebml); break; } default: GST_WARNING ("Unknown entry 0x%x in info header", id); /* fall-through */ case GST_EBML_ID_VOID: ret = gst_ebml_read_skip (ebml); break; } if (demux->level_up) { demux->level_up--; break; } } return ret; } static GstFlowReturn gst_matroska_demux_parse_metadata_id_simple_tag (GstMatroskaDemux * demux, gboolean prevent_eos, guint64 length, GstTagList ** p_taglist) { 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} }; GstEbmlRead *ebml = GST_EBML_READ (demux); GstFlowReturn ret; guint32 id; gchar *value = NULL; gchar *tag = NULL; if ((ret = gst_ebml_read_master (ebml, &id)) != GST_FLOW_OK) return ret; while (ret == GST_FLOW_OK) { /* read all sub-entries */ if (prevent_eos && length == ebml->offset) break; if ((ret = gst_ebml_peek_id (ebml, &demux->level_up, &id)) != GST_FLOW_OK) return ret; if (demux->level_up) { demux->level_up--; break; } switch (id) { case GST_MATROSKA_ID_TAGNAME: g_free (tag); tag = NULL; ret = gst_ebml_read_ascii (ebml, &id, &tag); break; case GST_MATROSKA_ID_TAGSTRING: g_free (value); value = NULL; ret = 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: ret = gst_ebml_read_skip (ebml); break; } if (demux->level_up) { demux->level_up--; break; } } if (tag && value) { guint i; for (i = 0; i < G_N_ELEMENTS (tag_conv); i++) { const gchar *tagname_gst = tag_conv[i].gstreamer_tagname; const gchar *tagname_mkv = tag_conv[i].matroska_tagname; if (strcmp (tagname_mkv, tag) == 0) { GValue src = { 0, }; GValue dest = { 0, }; GType dest_type = gst_tag_get_type (tagname_gst); 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 (*p_taglist, GST_TAG_MERGE_APPEND, tagname_gst, &dest, NULL); g_value_unset (&dest); break; } } } g_free (tag); g_free (value); return ret; } static GstFlowReturn gst_matroska_demux_parse_metadata_id_tag (GstMatroskaDemux * demux, gboolean prevent_eos, guint64 length, GstTagList ** p_taglist) { GstEbmlRead *ebml = GST_EBML_READ (demux); guint32 id; GstFlowReturn ret; if ((ret = gst_ebml_read_master (ebml, &id)) != GST_FLOW_OK) return ret; while (ret == GST_FLOW_OK) { /* read all sub-entries */ if (prevent_eos && length == ebml->offset) break; if ((ret = gst_ebml_peek_id (ebml, &demux->level_up, &id)) != GST_FLOW_OK) return ret; if (demux->level_up) { demux->level_up--; break; } switch (id) { case GST_MATROSKA_ID_SIMPLETAG: ret = gst_matroska_demux_parse_metadata_id_simple_tag (demux, prevent_eos, length, p_taglist); break; default: GST_WARNING ("Unknown entry 0x%x in metadata collection", id); /* fall-through */ case GST_EBML_ID_VOID: ret = gst_ebml_read_skip (ebml); break; } if (demux->level_up) { demux->level_up--; break; } } return ret; } static GstFlowReturn gst_matroska_demux_parse_metadata (GstMatroskaDemux * demux, gboolean prevent_eos) { GstEbmlRead *ebml = GST_EBML_READ (demux); GstTagList *taglist = gst_tag_list_new (); GstFlowReturn ret = GST_FLOW_OK; guint64 length = 0; guint32 id; if (prevent_eos) { length = gst_ebml_read_get_length (ebml); } while (ret == GST_FLOW_OK) { /* 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 == ebml->offset) break; if ((ret = gst_ebml_peek_id (ebml, &demux->level_up, &id)) != GST_FLOW_OK) return ret; if (demux->level_up) { demux->level_up--; break; } switch (id) { case GST_MATROSKA_ID_TAG: ret = gst_matroska_demux_parse_metadata_id_tag (demux, prevent_eos, length, &taglist); break; default: GST_WARNING ("Unknown entry 0x%x in metadata header", id); /* fall-through */ case GST_EBML_ID_VOID: ret = gst_ebml_read_skip (ebml); break; } if (demux->level_up) { demux->level_up--; break; } } if (gst_structure_n_fields (GST_STRUCTURE (taglist)) > 0) { gst_element_found_tags (GST_ELEMENT (ebml), taglist); } else { gst_tag_list_free (taglist); } return ret; } /* * 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 (read == num_ffs && total != 0) *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; } /* * Mostly used for subtitles. We add void filler data for each * lagging stream to make sure we don't deadlock. */ static void gst_matroska_demux_sync_streams (GstMatroskaDemux * demux) { gint stream_nr; GST_LOG ("Sync to %" GST_TIME_FORMAT, GST_TIME_ARGS (demux->segment.last_stop)); for (stream_nr = 0; stream_nr < demux->num_streams; stream_nr++) { GstMatroskaTrackContext *context; context = demux->src[stream_nr]; if (context->type != GST_MATROSKA_TRACK_TYPE_SUBTITLE) continue; GST_LOG ("Checking for resync on stream %d (%" GST_TIME_FORMAT ")", stream_nr, GST_TIME_ARGS (context->pos)); /* does it lag? 0.5 seconds is a random treshold... */ if (context->pos + (GST_SECOND / 2) < demux->segment.last_stop) { GST_DEBUG ("Synchronizing stream %d with others by advancing time " "from %" GST_TIME_FORMAT " to %" GST_TIME_FORMAT, stream_nr, GST_TIME_ARGS (context->pos), GST_TIME_ARGS (demux->segment.last_stop)); context->pos = demux->segment.last_stop; /* advance stream time */ gst_pad_push_event (context->pad, gst_event_new_new_segment (TRUE, demux->segment.rate, GST_FORMAT_TIME, demux->segment.last_stop, -1, demux->segment.last_stop)); } } } static GstFlowReturn gst_matroska_demux_push_hdr_buf (GstMatroskaDemux * demux, GstMatroskaTrackContext * stream, guint8 * data, guint len) { GstFlowReturn ret, cret; GstBuffer *header_buf = NULL; ret = gst_pad_alloc_buffer_and_set_caps (stream->pad, GST_BUFFER_OFFSET_NONE, len, stream->caps, &header_buf); /* we combine but don't use the combined value to check if we have a buffer * or not. The combined value is what we return. */ cret = gst_matroska_demux_combine_flows (demux, stream, ret); if (ret != GST_FLOW_OK) goto no_buffer; memcpy (GST_BUFFER_DATA (header_buf), data, len); if (stream->set_discont) { GST_BUFFER_FLAG_SET (header_buf, GST_BUFFER_FLAG_DISCONT); stream->set_discont = FALSE; } ret = gst_pad_push (stream->pad, header_buf); /* combine flows */ cret = gst_matroska_demux_combine_flows (demux, stream, ret); return cret; /* ERRORS */ no_buffer: { GST_DEBUG_OBJECT (demux, "could not alloc buffer: %s, combined %s", gst_flow_get_name (ret), gst_flow_get_name (cret)); return cret; } } static GstFlowReturn gst_matroska_demux_push_flac_codec_priv_data (GstMatroskaDemux * demux, GstMatroskaTrackContext * stream) { GstFlowReturn ret; guint8 *pdata; guint off, len; GST_LOG_OBJECT (demux, "priv data size = %u", stream->codec_priv_size); pdata = (guint8 *) stream->codec_priv; /* need at least 'fLaC' marker + STREAMINFO metadata block */ if (stream->codec_priv_size < ((4) + (4 + 34))) { GST_WARNING_OBJECT (demux, "not enough codec priv data for flac headers"); return GST_FLOW_ERROR; } if (memcmp (pdata, "fLaC", 4) != 0) { GST_WARNING_OBJECT (demux, "no flac marker at start of stream headers"); return GST_FLOW_ERROR; } ret = gst_matroska_demux_push_hdr_buf (demux, stream, pdata, 4); if (ret != GST_FLOW_OK) return ret; off = 4; /* skip fLaC marker */ while (off < stream->codec_priv_size) { len = GST_READ_UINT8 (pdata + off + 1) << 16; len |= GST_READ_UINT8 (pdata + off + 2) << 8; len |= GST_READ_UINT8 (pdata + off + 3); GST_DEBUG_OBJECT (demux, "header packet: len=%u bytes, flags=0x%02x", len, (guint) pdata[off]); ret = gst_matroska_demux_push_hdr_buf (demux, stream, pdata + off, len); if (ret != GST_FLOW_OK) return ret; off += 4 + len; } return GST_FLOW_OK; } static GstFlowReturn gst_matroska_demux_push_xiph_codec_priv_data (GstMatroskaDemux * demux, GstMatroskaTrackContext * stream) { GstFlowReturn ret; guint8 *p = (guint8 *) stream->codec_priv; gint i, offset, length, num_packets; /* start of the stream and vorbis audio or theora video, need to * send the codec_priv data as first three packets */ num_packets = p[0] + 1; GST_DEBUG_OBJECT (demux, "%u stream headers, total length=%u bytes", (guint) num_packets, stream->codec_priv_size); offset = num_packets; /* offset to data of first packet */ for (i = 0; i < num_packets - 1; i++) { length = p[i + 1]; GST_DEBUG_OBJECT (demux, "buffer %d: length=%u bytes", i, (guint) length); if (offset + length > stream->codec_priv_size) return GST_FLOW_ERROR; ret = gst_matroska_demux_push_hdr_buf (demux, stream, p + offset, length); if (ret != GST_FLOW_OK) return ret; offset += length; } length = stream->codec_priv_size - offset; GST_DEBUG_OBJECT (demux, "buffer %d: length=%u bytes", i, (guint) length); ret = gst_matroska_demux_push_hdr_buf (demux, stream, p + offset, length); if (ret != GST_FLOW_OK) return ret; return GST_FLOW_OK; } static void gst_matroska_demux_push_dvd_clut_change_event (GstMatroskaDemux * demux, GstMatroskaTrackContext * stream) { gchar *buf, *start; g_assert (!strcmp (stream->codec_id, GST_MATROSKA_CODEC_ID_SUBTITLE_VOBSUB)); if (!stream->codec_priv) return; /* ideally, VobSub private data should be parsed and stored more convenient * elsewhere, but for now, only interested in a small part */ /* make sure we have terminating 0 */ buf = g_strndup (stream->codec_priv, stream->codec_priv_size); /* just locate and parse palette part */ start = strstr (stream->codec_priv, "palette:"); if (start) { gint i; guint clut[16]; start += 8; while (g_ascii_isspace (*start)) start++; for (i = 0; i < 16; i++) { if (sscanf (start, "%06x", &clut[i]) != 1) break; start += 6; while ((*start == ',') || g_ascii_isspace (*start)) start++; } /* got them all without problems; build and send event */ if (i == 16) { GstStructure *s; s = gst_structure_new ("application/x-gst-dvd", "event", G_TYPE_STRING, "dvd-spu-clut-change", "clut00", G_TYPE_INT, clut[0], "clut01", G_TYPE_INT, clut[1], "clut02", G_TYPE_INT, clut[2], "clut03", G_TYPE_INT, clut[3], "clut04", G_TYPE_INT, clut[4], "clut05", G_TYPE_INT, clut[5], "clut06", G_TYPE_INT, clut[6], "clut07", G_TYPE_INT, clut[7], "clut08", G_TYPE_INT, clut[8], "clut09", G_TYPE_INT, clut[9], "clut10", G_TYPE_INT, clut[10], "clut11", G_TYPE_INT, clut[11], "clut12", G_TYPE_INT, clut[12], "clut13", G_TYPE_INT, clut[13], "clut14", G_TYPE_INT, clut[14], "clut15", G_TYPE_INT, clut[15], NULL); gst_pad_push_event (stream->pad, gst_event_new_custom (GST_EVENT_CUSTOM_DOWNSTREAM, s)); } } g_free (buf); } static gboolean gst_matroska_demux_stream_is_wavpack (GstMatroskaTrackContext * stream) { if (stream->type == GST_MATROSKA_TRACK_TYPE_AUDIO) { return (strcmp (stream->codec_id, GST_MATROSKA_CODEC_ID_AUDIO_WAVPACK4) == 0); } return FALSE; } static GstFlowReturn gst_matroska_demux_add_wvpk_header (GstMatroskaDemux * demux, GstMatroskaTrackContext * stream, gint block_length, GstBuffer ** buf) { GstBuffer *newbuf; guint8 *data; guint newlen; GstFlowReturn ret, cret; /* we need to reconstruct the header of the wavpack block */ Wavpack4Header wvh; wvh.ck_id[0] = 'w'; wvh.ck_id[1] = 'v'; wvh.ck_id[2] = 'p'; wvh.ck_id[3] = 'k'; /* -20 because ck_size is the size of the wavpack block -8 * and lace_size is the size of the wavpack block + 12 * (the three guint32 of the header that already are in the buffer) */ wvh.ck_size = block_length + sizeof (Wavpack4Header) - 20; wvh.version = GST_READ_UINT16_LE (stream->codec_priv); wvh.track_no = 0; wvh.index_no = 0; wvh.total_samples = -1; wvh.block_index = 0; /* block_samples, flags and crc are already in the buffer */ newlen = block_length + sizeof (Wavpack4Header) - 12; ret = gst_pad_alloc_buffer_and_set_caps (stream->pad, GST_BUFFER_OFFSET_NONE, newlen, stream->caps, &newbuf); cret = gst_matroska_demux_combine_flows (demux, stream, ret); if (ret != GST_FLOW_OK) { GST_DEBUG_OBJECT (demux, "pad_alloc failed %s, combined %s", gst_flow_get_name (ret), gst_flow_get_name (cret)); return cret; } data = GST_BUFFER_DATA (newbuf); data[0] = 'w'; data[1] = 'v'; data[2] = 'p'; data[3] = 'k'; GST_WRITE_UINT32_LE (data + 4, wvh.ck_size); GST_WRITE_UINT16_LE (data + 8, wvh.version); GST_WRITE_UINT8 (data + 10, wvh.track_no); GST_WRITE_UINT8 (data + 11, wvh.index_no); GST_WRITE_UINT32_LE (data + 12, wvh.total_samples); GST_WRITE_UINT32_LE (data + 16, wvh.block_index); g_memmove (data + 20, GST_BUFFER_DATA (*buf), block_length); gst_buffer_copy_metadata (newbuf, *buf, GST_BUFFER_COPY_TIMESTAMPS); gst_buffer_unref (*buf); *buf = newbuf; return cret; } static GstBuffer * gst_matroska_demux_check_subtitle_buffer (GstMatroskaDemux * demux, GstMatroskaTrackContext * stream, GstBuffer * buf) { GstMatroskaTrackSubtitleContext *sub_stream; const gchar *encoding, *data; GError *err = NULL; GstBuffer *newbuf; gchar *utf8; guint size; sub_stream = (GstMatroskaTrackSubtitleContext *) stream; if (!sub_stream->check_utf8) return buf; data = (const gchar *) GST_BUFFER_DATA (buf); size = GST_BUFFER_SIZE (buf); if (!sub_stream->invalid_utf8) { if (g_utf8_validate (data, size, NULL)) { return buf; } GST_WARNING_OBJECT (demux, "subtitle stream %d is not valid UTF-8, this " "is broken according to the matroska specification", stream->num); sub_stream->invalid_utf8 = TRUE; } /* file with broken non-UTF8 subtitle, do the best we can do to fix it */ encoding = g_getenv ("GST_SUBTITLE_ENCODING"); if (encoding == NULL || *encoding == '\0') { /* if local encoding is UTF-8 and no encoding specified * via the environment variable, assume ISO-8859-15 */ if (g_get_charset (&encoding)) { encoding = "ISO-8859-15"; } } utf8 = g_convert_with_fallback (data, size, "UTF-8", encoding, "*", NULL, NULL, &err); if (err) { GST_LOG_OBJECT (demux, "could not convert string from '%s' to UTF-8: %s", encoding, err->message); g_error_free (err); g_free (utf8); /* invalid input encoding, fall back to ISO-8859-15 (always succeeds) */ encoding = "ISO-8859-15"; utf8 = g_convert_with_fallback (data, size, "UTF-8", encoding, "*", NULL, NULL, NULL); } GST_LOG_OBJECT (demux, "converted subtitle text from %s to UTF-8 %s", encoding, (err) ? "(using ISO-8859-15 as fallback)" : ""); if (utf8 == NULL) utf8 = g_strdup ("invalid subtitle"); newbuf = gst_buffer_new (); GST_BUFFER_MALLOCDATA (newbuf) = (guint8 *) utf8; GST_BUFFER_DATA (newbuf) = (guint8 *) utf8; GST_BUFFER_SIZE (newbuf) = strlen (utf8); gst_buffer_copy_metadata (newbuf, buf, GST_BUFFER_COPY_TIMESTAMPS); gst_buffer_unref (buf); return newbuf; } static GstBuffer * gst_matroska_decode_buffer (GstMatroskaTrackContext * context, GstBuffer * buf) { gint i; g_assert (context->encodings != NULL); for (i = 0; i < context->encodings->len; i++) { GstMatroskaTrackEncoding *enc; guint8 *new_data = NULL; guint new_size = 0; GstBuffer *new_buf; enc = &g_array_index (context->encodings, GstMatroskaTrackEncoding, i); /* Currently only compression is supported */ if (enc->type != 0) break; /* FIXME: use enc->scope ? */ if (enc->comp_algo == 0) { #ifdef HAVE_ZLIB /* zlib encoded track */ z_stream zstream; guint orig_size; int result; orig_size = GST_BUFFER_SIZE (buf); zstream.zalloc = (alloc_func) 0; zstream.zfree = (free_func) 0; zstream.opaque = (voidpf) 0; if (inflateInit (&zstream) != Z_OK) { GST_WARNING ("zlib initialization failed."); break; } zstream.next_in = (Bytef *) GST_BUFFER_DATA (buf); zstream.avail_in = orig_size; new_size = orig_size; new_data = g_malloc (new_size); zstream.avail_out = new_size; do { new_size += 4000; new_data = g_realloc (new_data, new_size); zstream.next_out = (Bytef *) (new_data + zstream.total_out); result = inflate (&zstream, Z_NO_FLUSH); if (result != Z_OK && result != Z_STREAM_END) { GST_WARNING ("zlib decompression failed."); g_free (new_data); inflateEnd (&zstream); break; } zstream.avail_out += 4000; } while (zstream.avail_out == 4000 && zstream.avail_in != 0 && result != Z_STREAM_END); new_size = zstream.total_out; inflateEnd (&zstream); #else GST_WARNING ("GZIP encoded tracks not supported."); break; #endif } else if (enc->comp_algo == 1) { GST_WARNING ("BZIP encoded tracks not supported."); break; } else if (enc->comp_algo == 2) { GST_WARNING ("LZO encoded tracks not supported."); break; } else if (enc->comp_algo == 3) { GST_WARNING ("Header-stripped tracks not supported."); break; } else { g_assert_not_reached (); } g_assert (new_data != NULL); new_buf = gst_buffer_new (); GST_BUFFER_MALLOCDATA (new_buf) = (guint8 *) new_data; GST_BUFFER_DATA (new_buf) = (guint8 *) new_data; GST_BUFFER_SIZE (new_buf) = new_size; gst_buffer_copy_metadata (new_buf, buf, GST_BUFFER_COPY_TIMESTAMPS); gst_buffer_unref (buf); buf = new_buf; } return buf; } static GstFlowReturn gst_matroska_demux_parse_blockgroup_or_simpleblock (GstMatroskaDemux * demux, guint64 cluster_time, gboolean is_simpleblock) { GstMatroskaTrackContext *stream = NULL; GstEbmlRead *ebml = GST_EBML_READ (demux); GstFlowReturn ret = GST_FLOW_OK; gboolean readblock = FALSE; guint32 id; guint64 block_duration = 0; GstBuffer *buf = NULL; gint stream_num = 0, n, laces = 0; guint size = 0; gint *lace_size = NULL; gint64 time = 0; gint64 lace_time = 0; gint flags = 0; gint64 referenceblock = 0; while (ret == GST_FLOW_OK) { if (!is_simpleblock) { if ((ret = gst_ebml_peek_id (ebml, &demux->level_up, &id)) != GST_FLOW_OK) goto done; if (demux->level_up) { demux->level_up--; break; } } else { id = GST_MATROSKA_ID_SIMPLEBLOCK; } 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_SIMPLEBLOCK: case GST_MATROSKA_ID_BLOCK: { guint64 num; guint8 *data; if ((ret = gst_ebml_read_buffer (ebml, &id, &buf)) != GST_FLOW_OK) 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); buf = NULL; ret = GST_FLOW_ERROR; break; } data += n; size -= n; /* fetch stream from num */ stream_num = gst_matroska_demux_stream_from_num (demux, num); if (size <= 3 || stream_num < 0 || stream_num >= demux->num_streams) { gst_buffer_unref (buf); buf = NULL; GST_WARNING ("Invalid stream %d or size %u", stream_num, size); break; } stream = demux->src[stream_num]; /* time (relative to cluster time) */ time = ((gint16) GST_READ_UINT16_BE (data)) * demux->time_scale; data += 2; size -= 2; flags = GST_READ_UINT8 (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) { GST_ELEMENT_ERROR (demux, STREAM, DEMUX, (NULL), ("Invalid lacing size")); ret = GST_FLOW_ERROR; break; } laces = GST_READ_UINT8 (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; ret == GST_FLOW_OK && n < laces - 1; n++) { while (1) { if (size == 0) { GST_ELEMENT_ERROR (demux, STREAM, DEMUX, (NULL), ("Invalid lacing size")); ret = GST_FLOW_ERROR; break; } temp = GST_READ_UINT8 (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")); ret = GST_FLOW_ERROR; break; } data += n; size -= n; total = lace_size[0] = num; for (n = 1; ret == GST_FLOW_OK && 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")); ret = GST_FLOW_ERROR; break; } data += r; size -= r; lace_size[n] = lace_size[n - 1] + snum; total += lace_size[n]; } if (n < laces) lace_size[n] = size - total; break; } } break; } if (stream->send_xiph_headers) { ret = gst_matroska_demux_push_xiph_codec_priv_data (demux, stream); stream->send_xiph_headers = FALSE; } if (stream->send_flac_headers) { ret = gst_matroska_demux_push_flac_codec_priv_data (demux, stream); stream->send_flac_headers = FALSE; } if (stream->send_dvd_event) { gst_matroska_demux_push_dvd_clut_change_event (demux, stream); /* FIXME: should we send this event again after (flushing) seek ? */ stream->send_dvd_event = FALSE; } if (ret != GST_FLOW_OK) break; readblock = TRUE; break; } case GST_MATROSKA_ID_BLOCKDURATION:{ ret = gst_ebml_read_uint (ebml, &id, &block_duration); break; } case GST_MATROSKA_ID_REFERENCEBLOCK:{ ret = gst_ebml_read_sint (ebml, &id, &referenceblock); break; } default: GST_WARNING ("Unknown entry 0x%x in blockgroup data", id); /* fall-through */ case GST_EBML_ID_VOID: ret = gst_ebml_read_skip (ebml); break; } if (is_simpleblock) break; if (demux->level_up) { demux->level_up--; break; } } if (cluster_time != GST_CLOCK_TIME_NONE) { if (time < 0 && (-time) > cluster_time) lace_time = cluster_time; else lace_time = cluster_time + time; } else { lace_time = GST_CLOCK_TIME_NONE; } stream = demux->src[stream_num]; if (referenceblock && readblock && stream->set_discont) { /* When doing seeks or such, we need to restart on key frames or decoders might choke. */ readblock = FALSE; gst_buffer_unref (buf); buf = NULL; } if (ret == GST_FLOW_OK && readblock) { guint64 duration = 0; if (block_duration) { duration = block_duration * demux->time_scale; } else if (stream->default_duration) { duration = stream->default_duration; } for (n = 0; n < laces; n++) { GstBuffer *sub; if (lace_size[n] == 0) continue; sub = gst_buffer_create_sub (buf, GST_BUFFER_SIZE (buf) - size, lace_size[n]); if (stream->encodings != NULL && stream->encodings->len > 0) sub = gst_matroska_decode_buffer (stream, sub); GST_BUFFER_TIMESTAMP (sub) = lace_time; if (lace_time != GST_CLOCK_TIME_NONE) demux->segment.last_stop = lace_time; stream->pos = demux->segment.last_stop; gst_matroska_demux_sync_streams (demux); if (gst_matroska_demux_stream_is_wavpack (stream)) { ret = gst_matroska_demux_add_wvpk_header (demux, stream, lace_size[n], &sub); } /* FIXME: do all laces have the same lenght? */ if (duration) { GST_BUFFER_DURATION (sub) = duration / laces; stream->pos += GST_BUFFER_DURATION (sub); } if (is_simpleblock) { if (flags & 0x80) GST_BUFFER_FLAG_UNSET (sub, GST_BUFFER_FLAG_DELTA_UNIT); else GST_BUFFER_FLAG_SET (sub, GST_BUFFER_FLAG_DELTA_UNIT); } else { if (referenceblock) { GST_BUFFER_FLAG_SET (sub, GST_BUFFER_FLAG_DELTA_UNIT); } else { GST_BUFFER_FLAG_UNSET (sub, GST_BUFFER_FLAG_DELTA_UNIT); } } if (stream->set_discont) { GST_BUFFER_FLAG_SET (sub, GST_BUFFER_FLAG_DISCONT); stream->set_discont = FALSE; } GST_DEBUG ("Pushing lace %d, data of size %d for stream %d, time=%" GST_TIME_FORMAT " and duration=%" GST_TIME_FORMAT, n, GST_BUFFER_SIZE (sub), stream_num, GST_TIME_ARGS (GST_BUFFER_TIMESTAMP (sub)), GST_TIME_ARGS (GST_BUFFER_DURATION (sub))); gst_buffer_set_caps (sub, GST_PAD_CAPS (stream->pad)); /* Fix up broken files with subtitles that are not UTF8 */ if (stream->type == GST_MATROSKA_TRACK_TYPE_SUBTITLE) { sub = gst_matroska_demux_check_subtitle_buffer (demux, stream, sub); } ret = gst_pad_push (stream->pad, sub); /* combine flows */ ret = gst_matroska_demux_combine_flows (demux, stream, ret); size -= lace_size[n]; if (lace_time != GST_CLOCK_TIME_NONE) lace_time += duration; } } done: if (readblock) gst_buffer_unref (buf); g_free (lace_size); return ret; } static GstFlowReturn gst_matroska_demux_parse_cluster (GstMatroskaDemux * demux) { GstEbmlRead *ebml = GST_EBML_READ (demux); GstFlowReturn ret = GST_FLOW_OK; guint64 cluster_time = GST_CLOCK_TIME_NONE; guint32 id; while (ret == GST_FLOW_OK) { if ((ret = gst_ebml_peek_id (ebml, &demux->level_up, &id)) != GST_FLOW_OK) return ret; if (demux->level_up) { demux->level_up--; break; } switch (id) { /* cluster timecode */ case GST_MATROSKA_ID_CLUSTERTIMECODE: { guint64 num; if ((ret = gst_ebml_read_uint (ebml, &id, &num)) == GST_FLOW_OK) { cluster_time = num * demux->time_scale; } break; } /* a group of blocks inside a cluster */ case GST_MATROSKA_ID_BLOCKGROUP: if ((ret = gst_ebml_read_master (ebml, &id)) == GST_FLOW_OK) { ret = gst_matroska_demux_parse_blockgroup_or_simpleblock (demux, cluster_time, FALSE); } break; case GST_MATROSKA_ID_SIMPLEBLOCK: { ret = gst_matroska_demux_parse_blockgroup_or_simpleblock (demux, cluster_time, TRUE); break; } default: GST_WARNING ("Unknown entry 0x%x in cluster data", id); /* fall-through */ case GST_EBML_ID_VOID: ret = gst_ebml_read_skip (ebml); break; } if (demux->level_up) { demux->level_up--; break; } } return ret; } static GstFlowReturn gst_matroska_demux_parse_contents_seekentry (GstMatroskaDemux * demux, gboolean * p_run_loop) { GstEbmlRead *ebml = GST_EBML_READ (demux); GstFlowReturn ret; guint64 seek_pos = (guint64) - 1; guint32 seek_id = 0; guint32 id; if ((ret = gst_ebml_read_master (ebml, &id)) != GST_FLOW_OK) return ret; while (ret == GST_FLOW_OK) { if ((ret = gst_ebml_peek_id (ebml, &demux->level_up, &id)) != GST_FLOW_OK) return ret; if (demux->level_up) { demux->level_up--; break; } switch (id) { case GST_MATROSKA_ID_SEEKID: { guint64 t; if ((ret = gst_ebml_read_uint (ebml, &id, &t)) == GST_FLOW_OK) { seek_id = t; } break; } case GST_MATROSKA_ID_SEEKPOSITION: { guint64 t; if ((ret = gst_ebml_read_uint (ebml, &id, &t)) == GST_FLOW_OK) { seek_pos = t; } break; } default: GST_WARNING ("Unknown seekhead ID 0x%x", id); /* fall-through */ case GST_EBML_ID_VOID: ret = gst_ebml_read_skip (ebml); break; } if (demux->level_up) { demux->level_up--; break; } } if (ret != GST_FLOW_OK) return ret; if (!seek_id || seek_pos == (guint64) - 1) { GST_WARNING ("Incomplete seekhead entry (0x%x/%" G_GUINT64_FORMAT ")", seek_id, seek_pos); return GST_FLOW_OK; } 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; /* remember */ length = gst_ebml_read_get_length (ebml); before_pos = ebml->offset; /* check for validity */ if (seek_pos + demux->ebml_segment_start + 12 >= length) { GST_WARNING_OBJECT (demux, "Seekhead reference lies outside file!" " (%" G_GUINT64_FORMAT "+%" G_GUINT64_FORMAT "+12 >= %" G_GUINT64_FORMAT ")", seek_pos, demux->ebml_segment_start, length); break; } /* seek */ if (gst_ebml_read_seek (ebml, seek_pos + demux->ebml_segment_start) != GST_FLOW_OK) return GST_FLOW_ERROR; /* 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 ((ret = gst_ebml_peek_id (ebml, &demux->level_up, &id)) != GST_FLOW_OK) return ret; if (id != seek_id) { g_warning ("We looked for ID=0x%x but got ID=0x%x (pos=%" G_GUINT64_FORMAT ")", seek_id, id, seek_pos + demux->ebml_segment_start); goto finish; } /* read master + parse */ switch (id) { case GST_MATROSKA_ID_CUES: if ((ret = gst_ebml_read_master (ebml, &id)) != GST_FLOW_OK) return ret; if ((ret = gst_matroska_demux_parse_index (demux, TRUE)) != GST_FLOW_OK) return ret; if (gst_ebml_read_get_length (ebml) == ebml->offset) *p_run_loop = FALSE; else demux->index_parsed = TRUE; break; case GST_MATROSKA_ID_TAGS: if ((ret = gst_ebml_read_master (ebml, &id)) != GST_FLOW_OK) return ret; if ((ret = gst_matroska_demux_parse_metadata (demux, TRUE)) != GST_FLOW_OK) return ret; if (gst_ebml_read_get_length (ebml) == ebml->offset) *p_run_loop = FALSE; else demux->metadata_parsed = TRUE; break; } /* used to be here in 0.8 version, but makes mewmew sample not work */ /* if (*p_run_loop == FALSE) 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 */ (void) gst_ebml_read_seek (ebml, before_pos); demux->level_up = level_up; break; } default: GST_INFO ("Ignoring seekhead entry for ID=0x%x", seek_id); break; } return ret; } static GstFlowReturn gst_matroska_demux_parse_contents (GstMatroskaDemux * demux, gboolean * p_run_loop) { GstEbmlRead *ebml = GST_EBML_READ (demux); GstFlowReturn ret = GST_FLOW_OK; guint32 id; while (ret == GST_FLOW_OK) { if ((ret = gst_ebml_peek_id (ebml, &demux->level_up, &id)) != GST_FLOW_OK) return ret; if (demux->level_up) { demux->level_up--; break; } switch (id) { case GST_MATROSKA_ID_SEEKENTRY: { ret = gst_matroska_demux_parse_contents_seekentry (demux, p_run_loop); break; } default: GST_WARNING ("Unknown seekhead ID 0x%x", id); /* fall-through */ case GST_EBML_ID_VOID: ret = gst_ebml_read_skip (ebml); break; } if (demux->level_up) { demux->level_up--; break; } } return ret; } /* returns FALSE on error, otherwise TRUE */ static GstFlowReturn gst_matroska_demux_loop_stream_parse_id (GstMatroskaDemux * demux, guint32 id, gboolean * p_run_loop) { GstEbmlRead *ebml = GST_EBML_READ (demux); GstFlowReturn ret; switch (id) { /* stream info */ case GST_MATROSKA_ID_INFO: if ((ret = gst_ebml_read_master (ebml, &id)) != GST_FLOW_OK) return ret; if ((ret = gst_matroska_demux_parse_info (demux)) != GST_FLOW_OK) return ret; break; /* track info headers */ case GST_MATROSKA_ID_TRACKS: { if ((ret = gst_ebml_read_master (ebml, &id)) != GST_FLOW_OK) return ret; if ((ret = gst_matroska_demux_parse_tracks (demux)) != GST_FLOW_OK) return ret; break; } /* stream index */ case GST_MATROSKA_ID_CUES: { if (!demux->index_parsed) { if ((ret = gst_ebml_read_master (ebml, &id)) != GST_FLOW_OK) return ret; if ((ret = gst_matroska_demux_parse_index (demux, FALSE)) != GST_FLOW_OK) return ret; } else { if ((ret = gst_ebml_read_skip (ebml)) != GST_FLOW_OK) return ret; } break; } /* metadata */ case GST_MATROSKA_ID_TAGS: { if (!demux->index_parsed) { if ((ret = gst_ebml_read_master (ebml, &id)) != GST_FLOW_OK) return ret; if ((ret = gst_matroska_demux_parse_metadata (demux, FALSE)) != GST_FLOW_OK) return ret; } else { if ((ret = gst_ebml_read_skip (ebml)) != GST_FLOW_OK) return ret; } break; } /* file index (if seekable, seek to Cues/Tags to parse it) */ case GST_MATROSKA_ID_SEEKHEAD: { if ((ret = gst_ebml_read_master (ebml, &id)) != GST_FLOW_OK) return ret; if ((ret = gst_matroska_demux_parse_contents (demux, p_run_loop)) != GST_FLOW_OK) return ret; break; } case GST_MATROSKA_ID_CLUSTER: { if (demux->state != GST_MATROSKA_DEMUX_STATE_DATA) { demux->state = GST_MATROSKA_DEMUX_STATE_DATA; /* FIXME: different streams might have different lengths! */ /* send initial discont */ gst_matroska_demux_send_event (demux, gst_event_new_new_segment (FALSE, 1.0, GST_FORMAT_TIME, 0, (demux->segment.duration > 0) ? demux->segment.duration : -1, 0)); GST_DEBUG_OBJECT (demux, "signaling no more pads"); gst_element_no_more_pads (GST_ELEMENT (demux)); } else { if ((ret = gst_ebml_read_master (ebml, &id)) != GST_FLOW_OK) return ret; /* 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. */ if ((ret = gst_matroska_demux_parse_cluster (demux)) != GST_FLOW_OK) return ret; *p_run_loop = FALSE; } break; } default: GST_WARNING ("Unknown matroska file header ID 0x%x at %" G_GUINT64_FORMAT, id, GST_EBML_READ (demux)->offset); /* fall-through */ case GST_EBML_ID_VOID: { if ((ret = gst_ebml_read_skip (ebml)) != GST_FLOW_OK) return ret; break; } } return GST_FLOW_OK; } static GstFlowReturn gst_matroska_demux_loop_stream (GstMatroskaDemux * demux) { GstEbmlRead *ebml = GST_EBML_READ (demux); GstFlowReturn ret = GST_FLOW_OK; gboolean run_loop = TRUE; guint32 id; /* we've found our segment, start reading the different contents in here */ while (run_loop && ret == GST_FLOW_OK) { if ((ret = gst_ebml_peek_id (ebml, &demux->level_up, &id)) != GST_FLOW_OK) return ret; if (demux->level_up) { demux->level_up--; break; } ret = gst_matroska_demux_loop_stream_parse_id (demux, id, &run_loop); if (demux->level_up) { demux->level_up--; break; } } return ret; } static void gst_matroska_demux_loop (GstPad * pad) { GstMatroskaDemux *demux = GST_MATROSKA_DEMUX (gst_pad_get_parent (pad)); GstEbmlRead *ebml = GST_EBML_READ (demux); GstFlowReturn ret; /* first, if we're to start, let's actually get starting */ if (demux->state == GST_MATROSKA_DEMUX_STATE_START) { ret = gst_matroska_demux_init_stream (demux); if (ret != GST_FLOW_OK) { GST_WARNING_OBJECT (demux, "init stream failed!"); goto pause; } demux->state = GST_MATROSKA_DEMUX_STATE_HEADER; } ret = gst_matroska_demux_loop_stream (demux); if (ret != GST_FLOW_OK) goto pause; /* check if we're at the end of a configured segment */ if (GST_CLOCK_TIME_IS_VALID (demux->segment.stop)) { guint i; for (i = 0; i < demux->num_streams; i++) { if (demux->src[i]->pos >= demux->segment.stop) { GST_INFO_OBJECT (demux, "Reached end of segment (%" G_GUINT64_FORMAT "-%" G_GUINT64_FORMAT ") on pad %s:%s", demux->segment.start, demux->segment.stop, GST_DEBUG_PAD_NAME (demux->src[i]->pad)); ret = GST_FLOW_UNEXPECTED; goto pause; } } } if (ebml->offset == gst_ebml_read_get_length (ebml)) { GST_LOG ("Reached end of stream, sending EOS"); ret = GST_FLOW_UNEXPECTED; goto pause; } /* all is fine */ gst_object_unref (demux); return; /* ERRORS */ pause: { const gchar *reason = gst_flow_get_name (ret); GST_LOG_OBJECT (demux, "pausing task, reason %s", reason); demux->segment_running = FALSE; gst_pad_pause_task (demux->sinkpad); if (GST_FLOW_IS_FATAL (ret) || ret == GST_FLOW_NOT_LINKED) { if (ret == GST_FLOW_UNEXPECTED) { /* perform EOS logic */ if (demux->segment.flags & GST_SEEK_FLAG_SEGMENT) { gint64 stop; /* for segment playback we need to post when (in stream time) * we stopped, this is either stop (when set) or the duration. */ if ((stop = demux->segment.stop) == -1) stop = demux->segment.duration; GST_LOG_OBJECT (demux, "Sending segment done, at end of segment"); gst_element_post_message (GST_ELEMENT (demux), gst_message_new_segment_done (GST_OBJECT (demux), GST_FORMAT_TIME, stop)); } else { /* normal playback, send EOS to all linked pads */ GST_LOG_OBJECT (demux, "Sending EOS, at end of stream"); gst_matroska_demux_send_event (demux, gst_event_new_eos ()); } } else { GST_ELEMENT_ERROR (demux, STREAM, FAILED, (NULL), ("stream stopped, reason %s", reason)); gst_matroska_demux_send_event (demux, gst_event_new_eos ()); } } gst_object_unref (demux); return; } } static gboolean gst_matroska_demux_sink_activate (GstPad * sinkpad) { if (gst_pad_check_pull_range (sinkpad)) return gst_pad_activate_pull (sinkpad, TRUE); return FALSE; } static gboolean gst_matroska_demux_sink_activate_pull (GstPad * sinkpad, gboolean active) { GstMatroskaDemux *demux = GST_MATROSKA_DEMUX (GST_PAD_PARENT (sinkpad)); if (active) { /* if we have a scheduler we can start the task */ demux->segment_running = TRUE; gst_pad_start_task (sinkpad, (GstTaskFunction) gst_matroska_demux_loop, sinkpad); } else { demux->segment_running = FALSE; gst_pad_stop_task (sinkpad); } return TRUE; } static GstCaps * gst_matroska_demux_video_caps (GstMatroskaTrackVideoContext * videocontext, const gchar * codec_id, gpointer data, guint size, gchar ** codec_name) { GstMatroskaTrackContext *context = (GstMatroskaTrackContext *) videocontext; GstCaps *caps = NULL; g_assert (videocontext != NULL); g_assert (codec_name != NULL); context->send_xiph_headers = FALSE; context->send_flac_headers = FALSE; if (!strcmp (codec_id, GST_MATROSKA_CODEC_ID_VIDEO_VFW_FOURCC)) { gst_riff_strf_vids *vids = NULL; if (data) { GstBuffer *buf = NULL; 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); if (size > sizeof (gst_riff_strf_vids)) { /* some extra_data */ buf = gst_buffer_new_and_alloc (size - sizeof (gst_riff_strf_vids)); memcpy (GST_BUFFER_DATA (buf), (guint8 *) vids + sizeof (gst_riff_strf_vids), GST_BUFFER_SIZE (buf)); } caps = gst_riff_create_video_caps (vids->compression, NULL, vids, buf, NULL, codec_name); if (buf) gst_buffer_unref (buf); } } else if (!strcmp (codec_id, GST_MATROSKA_CODEC_ID_VIDEO_UNCOMPRESSED)) { guint32 fourcc = 0; /* how nice, this is undocumented... */ switch (videocontext->fourcc) { case GST_MAKE_FOURCC ('I', '4', '2', '0'): *codec_name = g_strdup ("Raw planar YUV 4:2:0"); fourcc = videocontext->fourcc; break; case GST_MAKE_FOURCC ('Y', 'U', 'Y', '2'): *codec_name = g_strdup ("Raw packed YUV 4:2:2"); 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 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); *codec_name = g_strdup ("MPEG-4 simple profile"); } else if (!strcmp (codec_id, GST_MATROSKA_CODEC_ID_VIDEO_MPEG4_ASP) || !strcmp (codec_id, GST_MATROSKA_CODEC_ID_VIDEO_MPEG4_AP)) { #if 0 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); #endif caps = gst_caps_new_simple ("video/mpeg", "mpegversion", G_TYPE_INT, 4, "systemstream", G_TYPE_BOOLEAN, FALSE, NULL); if (!strcmp (codec_id, GST_MATROSKA_CODEC_ID_VIDEO_MPEG4_ASP)) *codec_name = g_strdup ("MPEG-4 advanced simple profile"); else *codec_name = g_strdup ("MPEG-4 advanced profile"); } else if (!strcmp (codec_id, GST_MATROSKA_CODEC_ID_VIDEO_MSMPEG4V3)) { #if 0 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); #endif caps = gst_caps_new_simple ("video/x-msmpeg", "msmpegversion", G_TYPE_INT, 43, NULL); *codec_name = g_strdup ("Microsoft MPEG-4 v.3"); } 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_not_reached (); caps = gst_caps_new_simple ("video/mpeg", "systemstream", G_TYPE_BOOLEAN, FALSE, "mpegversion", G_TYPE_INT, mpegversion, NULL); *codec_name = g_strdup_printf ("MPEG-%d video", mpegversion); } else if (!strcmp (codec_id, GST_MATROSKA_CODEC_ID_VIDEO_MJPEG)) { caps = gst_caps_new_simple ("image/jpeg", NULL); *codec_name = g_strdup ("Motion-JPEG"); } else if (!strcmp (codec_id, GST_MATROSKA_CODEC_ID_VIDEO_MPEG4_AVC)) { caps = gst_caps_new_simple ("video/x-h264", NULL); if (data) { GstBuffer *priv = gst_buffer_new_and_alloc (size); memcpy (GST_BUFFER_DATA (priv), data, size); gst_caps_set_simple (caps, "codec_data", GST_TYPE_BUFFER, priv, NULL); gst_buffer_unref (priv); } *codec_name = g_strdup ("H264"); } else if ((!strcmp (codec_id, GST_MATROSKA_CODEC_ID_VIDEO_REALVIDEO1)) || (!strcmp (codec_id, GST_MATROSKA_CODEC_ID_VIDEO_REALVIDEO2)) || (!strcmp (codec_id, GST_MATROSKA_CODEC_ID_VIDEO_REALVIDEO3)) || (!strcmp (codec_id, GST_MATROSKA_CODEC_ID_VIDEO_REALVIDEO4))) { gint rmversion = -1; if (!strcmp (codec_id, GST_MATROSKA_CODEC_ID_VIDEO_REALVIDEO1)) rmversion = 1; else if (!strcmp (codec_id, GST_MATROSKA_CODEC_ID_VIDEO_REALVIDEO2)) rmversion = 2; else if (!strcmp (codec_id, GST_MATROSKA_CODEC_ID_VIDEO_REALVIDEO3)) rmversion = 3; else if (!strcmp (codec_id, GST_MATROSKA_CODEC_ID_VIDEO_REALVIDEO4)) rmversion = 4; caps = gst_caps_new_simple ("video/x-pn-realvideo", "rmversion", G_TYPE_INT, rmversion, NULL); *codec_name = g_strdup_printf ("RealVideo %d.0", rmversion); } else if (!strcmp (codec_id, GST_MATROSKA_CODEC_ID_VIDEO_THEORA)) { caps = gst_caps_new_simple ("video/x-theora", NULL); context->send_xiph_headers = TRUE; } else if (!strcmp (codec_id, GST_MATROSKA_CODEC_ID_VIDEO_DIRAC)) { caps = gst_caps_new_simple ("video/x-dirac", NULL); context->send_xiph_headers = FALSE; } 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); 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); } 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 (videocontext->default_fps > 0.0) { GValue fps_double = { 0, }; GValue fps_fraction = { 0, }; g_value_init (&fps_double, G_TYPE_DOUBLE); g_value_init (&fps_fraction, GST_TYPE_FRACTION); g_value_set_double (&fps_double, videocontext->default_fps); g_value_transform (&fps_double, &fps_fraction); gst_structure_set_value (structure, "framerate", &fps_fraction); g_value_unset (&fps_double); g_value_unset (&fps_fraction); } else if (context->default_duration > 0) { GValue fps_double = { 0, }; GValue fps_fraction = { 0, }; g_value_init (&fps_double, G_TYPE_DOUBLE); g_value_init (&fps_fraction, GST_TYPE_FRACTION); g_value_set_double (&fps_double, (gdouble) GST_SECOND / gst_guint64_to_gdouble (context->default_duration)); g_value_transform (&fps_double, &fps_fraction); gst_structure_set_value (structure, "framerate", &fps_fraction); g_value_unset (&fps_double); g_value_unset (&fps_fraction); } else { /* sort of a hack to get most codecs to support, * even if the default_duration is missing */ gst_structure_set (structure, "framerate", GST_TYPE_FRACTION, 25, 1, NULL); } } gst_caps_do_simplify (caps); } return caps; } /* * Some AAC specific code... *sigh* * FIXME: maybe we should use '15' and code the sample rate explicitly * if the sample rate doesn't match the predefined rates exactly? (tpm) */ static gint aac_rate_idx (gint rate) { if (92017 <= rate) return 0; else if (75132 <= rate) return 1; else if (55426 <= rate) return 2; else if (46009 <= rate) return 3; else if (37566 <= rate) return 4; else if (27713 <= rate) return 5; else if (23004 <= rate) return 6; else if (18783 <= rate) return 7; else if (13856 <= rate) return 8; else if (11502 <= rate) return 9; else if (9391 <= rate) return 10; else return 11; } static gint aac_profile_idx (const gchar * codec_id) { gint profile; if (strlen (codec_id) <= 12) profile = 3; else if (!strncmp (&codec_id[12], "MAIN", 4)) profile = 0; else if (!strncmp (&codec_id[12], "LC", 2)) profile = 1; else if (!strncmp (&codec_id[12], "SSR", 3)) profile = 2; else profile = 3; return profile; } #define AAC_SYNC_EXTENSION_TYPE 0x02b7 static GstCaps * gst_matroska_demux_audio_caps (GstMatroskaTrackAudioContext * audiocontext, const gchar * codec_id, gpointer data, guint size, gchar ** codec_name) { GstMatroskaTrackContext *context = (GstMatroskaTrackContext *) audiocontext; GstCaps *caps = NULL; g_assert (audiocontext != NULL); g_assert (codec_name != NULL); context->send_xiph_headers = FALSE; context->send_flac_headers = FALSE; 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_not_reached (); caps = gst_caps_new_simple ("audio/mpeg", "mpegversion", G_TYPE_INT, 1, "layer", G_TYPE_INT, layer, NULL); *codec_name = g_strdup_printf ("MPEG-1 layer %d", layer); } 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_not_reached (); 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, "endianness", G_TYPE_INT, endianness, NULL); *codec_name = g_strdup_printf ("Raw %d-bit PCM audio", audiocontext->bitdepth); } 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, "width", G_TYPE_INT, audiocontext->bitdepth, NULL); *codec_name = g_strdup_printf ("Raw %d-bit floating-point audio", audiocontext->bitdepth); } else if (!strncmp (codec_id, GST_MATROSKA_CODEC_ID_AUDIO_AC3, strlen (GST_MATROSKA_CODEC_ID_AUDIO_AC3))) { caps = gst_caps_new_simple ("audio/x-ac3", NULL); *codec_name = g_strdup ("AC-3 audio"); } else if (!strcmp (codec_id, GST_MATROSKA_CODEC_ID_AUDIO_DTS)) { caps = gst_caps_new_simple ("audio/x-dts", NULL); *codec_name = g_strdup ("DTS audio"); } else if (!strcmp (codec_id, GST_MATROSKA_CODEC_ID_AUDIO_VORBIS)) { caps = gst_caps_new_simple ("audio/x-vorbis", NULL); context->send_xiph_headers = TRUE; /* vorbis decoder does tags */ } else if (!strcmp (codec_id, GST_MATROSKA_CODEC_ID_AUDIO_FLAC)) { caps = gst_caps_new_simple ("audio/x-flac", NULL); context->send_flac_headers = TRUE; } else if (!strcmp (codec_id, GST_MATROSKA_CODEC_ID_AUDIO_ACM)) { gst_riff_strf_auds *auds = NULL; if (data) { 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, NULL, NULL, codec_name); } } else if (g_str_has_prefix (codec_id, "A_AAC")) { GstBuffer *priv = NULL; gint mpegversion = -1; gint rate_idx, profile; guint8 *data = NULL; /* unspecified AAC profile with opaque private codec data */ if (strcmp (codec_id, "A_AAC") == 0) { if (context->codec_priv_size >= 2) { guint obj_type, freq_index, explicit_freq_bytes = 0; codec_id = GST_MATROSKA_CODEC_ID_AUDIO_MPEG4; freq_index = (GST_READ_UINT16_BE (context->codec_priv) & 0x780) >> 7; obj_type = (GST_READ_UINT16_BE (context->codec_priv) & 0xF800) >> 11; if (freq_index == 15) explicit_freq_bytes = 3; GST_DEBUG ("obj_type = %u, freq_index = %u", obj_type, freq_index); priv = gst_buffer_new_and_alloc (context->codec_priv_size); memcpy (GST_BUFFER_DATA (priv), context->codec_priv, context->codec_priv_size); /* assume SBR if samplerate <= 24kHz */ if (obj_type == 5 || (freq_index >= 6 && freq_index != 15) || (context->codec_priv_size == (5 + explicit_freq_bytes))) { audiocontext->samplerate *= 2; } } else { GST_WARNING ("Opaque A_AAC codec ID, but no codec private data"); /* just try this and see what happens ... */ codec_id = GST_MATROSKA_CODEC_ID_AUDIO_MPEG4; } } /* make up decoder-specific data if it is not supplied */ if (priv == NULL) { priv = gst_buffer_new_and_alloc (5); data = GST_BUFFER_DATA (priv); rate_idx = aac_rate_idx (audiocontext->samplerate); profile = aac_profile_idx (codec_id); data[0] = ((profile + 1) << 3) | ((rate_idx & 0xE) >> 1); data[1] = ((rate_idx & 0x1) << 7) | (audiocontext->channels << 3); GST_BUFFER_SIZE (priv) = 2; } 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; if (g_strrstr (codec_id, "SBR")) { /* HE-AAC (aka SBR AAC) */ audiocontext->samplerate *= 2; rate_idx = aac_rate_idx (audiocontext->samplerate); data[2] = AAC_SYNC_EXTENSION_TYPE >> 3; data[3] = ((AAC_SYNC_EXTENSION_TYPE & 0x07) << 5) | 5; data[4] = (1 << 7) | (rate_idx << 3); GST_BUFFER_SIZE (priv) = 5; } } else { g_assert_not_reached (); } caps = gst_caps_new_simple ("audio/mpeg", "mpegversion", G_TYPE_INT, mpegversion, "framed", G_TYPE_BOOLEAN, TRUE, NULL); if (priv) { gst_caps_set_simple (caps, "codec_data", GST_TYPE_BUFFER, priv, NULL); } *codec_name = g_strdup_printf ("MPEG-%d AAC audio", mpegversion); } else if (!strcmp (codec_id, GST_MATROSKA_CODEC_ID_AUDIO_TTA)) { caps = gst_caps_new_simple ("audio/x-tta", "width", G_TYPE_INT, audiocontext->bitdepth, NULL); *codec_name = g_strdup ("TTA audio"); } else if (!strcmp (codec_id, GST_MATROSKA_CODEC_ID_AUDIO_WAVPACK4)) { caps = gst_caps_new_simple ("audio/x-wavpack", "width", G_TYPE_INT, audiocontext->bitdepth, "framed", G_TYPE_BOOLEAN, TRUE, NULL); *codec_name = g_strdup ("Wavpack audio"); } else if ((!strcmp (codec_id, GST_MATROSKA_CODEC_ID_AUDIO_REAL_14_4)) || (!strcmp (codec_id, GST_MATROSKA_CODEC_ID_AUDIO_REAL_14_4)) || (!strcmp (codec_id, GST_MATROSKA_CODEC_ID_AUDIO_REAL_COOK))) { gint raversion = -1; if (!strcmp (codec_id, GST_MATROSKA_CODEC_ID_AUDIO_REAL_14_4)) raversion = 1; else if (!strcmp (codec_id, GST_MATROSKA_CODEC_ID_AUDIO_REAL_COOK)) raversion = 8; else raversion = 2; caps = gst_caps_new_simple ("audio/x-pn-realaudio", "raversion", G_TYPE_INT, raversion, NULL); *codec_name = g_strdup_printf ("RealAudio %d.0", raversion); } else if (!strcmp (codec_id, GST_MATROSKA_CODEC_ID_AUDIO_REAL_SIPR)) { caps = gst_caps_new_simple ("audio/x-sipro", NULL); *codec_name = g_strdup ("Sipro/ACELP.NET Voice Codec"); } else if (!strcmp (codec_id, GST_MATROSKA_CODEC_ID_AUDIO_REAL_RALF)) { caps = gst_caps_new_simple ("audio/x-ralf-mpeg4-generic", NULL); *codec_name = g_strdup ("Real Audio Lossless"); } else if (!strcmp (codec_id, GST_MATROSKA_CODEC_ID_AUDIO_REAL_ATRC)) { caps = gst_caps_new_simple ("audio/x-vnd.sony.atrac3", NULL); *codec_name = g_strdup ("Sony ATRAC3"); } else { GST_WARNING ("Unknown codec '%s', cannot build Caps", codec_id); return NULL; } if (caps != NULL) { if (audiocontext->samplerate > 0 && audiocontext->channels > 0) { gint i; for (i = 0; i < gst_caps_get_size (caps); i++) { gst_structure_set (gst_caps_get_structure (caps, i), "channels", G_TYPE_INT, audiocontext->channels, "rate", G_TYPE_INT, audiocontext->samplerate, NULL); } } gst_caps_do_simplify (caps); } return caps; } static GstCaps * gst_matroska_demux_complex_caps (GstMatroskaTrackComplexContext * complexcontext, const gchar * codec_id, gpointer data, guint size) { GstCaps *caps = NULL; GST_DEBUG ("Unknown complex stream: codec_id='%s'", codec_id); return caps; } static GstCaps * gst_matroska_demux_subtitle_caps (GstMatroskaTrackSubtitleContext * subtitlecontext, const gchar * codec_id, gpointer data, guint size) { GstCaps *caps = NULL; /* for backwards compatibility */ if (!g_ascii_strcasecmp (codec_id, "S_TEXT/ASCII")) codec_id = GST_MATROSKA_CODEC_ID_SUBTITLE_UTF8; else if (!g_ascii_strcasecmp (codec_id, "S_SSA")) codec_id = GST_MATROSKA_CODEC_ID_SUBTITLE_SSA; else if (!g_ascii_strcasecmp (codec_id, "S_ASS")) codec_id = GST_MATROSKA_CODEC_ID_SUBTITLE_ASS; else if (!g_ascii_strcasecmp (codec_id, "S_USF")) codec_id = GST_MATROSKA_CODEC_ID_SUBTITLE_USF; if (!strcmp (codec_id, GST_MATROSKA_CODEC_ID_SUBTITLE_UTF8)) { caps = gst_caps_new_simple ("text/plain", NULL); subtitlecontext->check_utf8 = TRUE; } else if (!strcmp (codec_id, GST_MATROSKA_CODEC_ID_SUBTITLE_SSA)) { caps = gst_caps_new_simple ("application/x-ssa", NULL); subtitlecontext->check_utf8 = TRUE; } else if (!strcmp (codec_id, GST_MATROSKA_CODEC_ID_SUBTITLE_ASS)) { caps = gst_caps_new_simple ("application/x-ass", NULL); subtitlecontext->check_utf8 = TRUE; } else if (!strcmp (codec_id, GST_MATROSKA_CODEC_ID_SUBTITLE_USF)) { caps = gst_caps_new_simple ("application/x-usf", NULL); subtitlecontext->check_utf8 = TRUE; } else if (!strcmp (codec_id, GST_MATROSKA_CODEC_ID_SUBTITLE_VOBSUB)) { caps = gst_caps_new_simple ("video/x-dvd-subpicture", NULL); ((GstMatroskaTrackContext *) subtitlecontext)->send_dvd_event = TRUE; subtitlecontext->check_utf8 = FALSE; } else { GST_DEBUG ("Unknown subtitle stream: codec_id='%s'", codec_id); caps = gst_caps_new_simple ("application/x-subtitle-unknown", NULL); subtitlecontext->check_utf8 = FALSE; } if (data != NULL && size > 0) { GstBuffer *buf; buf = gst_buffer_new_and_alloc (size); memcpy (GST_BUFFER_DATA (buf), data, size); gst_caps_set_simple (caps, "codec_data", GST_TYPE_BUFFER, buf, NULL); gst_buffer_unref (buf); } return caps; } static GstStateChangeReturn gst_matroska_demux_change_state (GstElement * element, GstStateChange transition) { GstMatroskaDemux *demux = GST_MATROSKA_DEMUX (element); GstStateChangeReturn ret = GST_STATE_CHANGE_SUCCESS; /* handle upwards state changes here */ switch (transition) { default: break; } ret = GST_ELEMENT_CLASS (parent_class)->change_state (element, transition); /* handle downwards state changes */ switch (transition) { case GST_STATE_CHANGE_PAUSED_TO_READY: gst_matroska_demux_reset (GST_ELEMENT (demux)); break; default: break; } return ret; } gboolean gst_matroska_demux_plugin_init (GstPlugin * plugin) { gst_riff_init (); /* 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; }