- int res = 0;
- uint32_t id;
- MatroskaTrack *track;
-
- /* start with the master */
- if ((res = ebml_read_master(matroska, &id)) < 0)
- return res;
-
- av_log(matroska->ctx, AV_LOG_DEBUG, "parsing track, adding stream..,\n");
-
- /* Allocate a generic track. */
- track = av_mallocz(MAX_TRACK_SIZE);
- track->time_scale = 1.0;
- strcpy(track->language, "eng");
-
- /* try reading the trackentry headers */
- while (res == 0) {
- if (!(id = ebml_peek_id(matroska, &matroska->level_up))) {
- res = AVERROR(EIO);
- break;
- } else if (matroska->level_up > 0) {
- matroska->level_up--;
- break;
- }
-
- switch (id) {
- /* track number (unique stream ID) */
- case MATROSKA_ID_TRACKNUMBER: {
- uint64_t num;
- if ((res = ebml_read_uint(matroska, &id, &num)) < 0)
- break;
- track->num = num;
- break;
- }
-
- /* track UID (unique identifier) */
- case MATROSKA_ID_TRACKUID: {
- uint64_t num;
- if ((res = ebml_read_uint(matroska, &id, &num)) < 0)
- break;
- track->uid = num;
- break;
- }
-
- /* track type (video, audio, combined, subtitle, etc.) */
- case MATROSKA_ID_TRACKTYPE: {
- uint64_t num;
- if ((res = ebml_read_uint(matroska, &id, &num)) < 0)
- break;
- if (track->type && track->type != num) {
- av_log(matroska->ctx, AV_LOG_INFO,
- "More than one tracktype in an entry - skip\n");
- break;
- }
- track->type = num;
-
- switch (track->type) {
- case MATROSKA_TRACK_TYPE_VIDEO:
- case MATROSKA_TRACK_TYPE_AUDIO:
- case MATROSKA_TRACK_TYPE_SUBTITLE:
- break;
- case MATROSKA_TRACK_TYPE_COMPLEX:
- case MATROSKA_TRACK_TYPE_LOGO:
- case MATROSKA_TRACK_TYPE_CONTROL:
- default:
- av_log(matroska->ctx, AV_LOG_INFO,
- "Unknown or unsupported track type 0x%x\n",
- track->type);
- track->type = MATROSKA_TRACK_TYPE_NONE;
- break;
- }
- break;
- }
-
- /* tracktype specific stuff for video */
- case MATROSKA_ID_TRACKVIDEO: {
- MatroskaVideoTrack *videotrack;
- if (!track->type)
- track->type = MATROSKA_TRACK_TYPE_VIDEO;
- if (track->type != MATROSKA_TRACK_TYPE_VIDEO) {
- av_log(matroska->ctx, AV_LOG_INFO,
- "video data in non-video track - ignoring\n");
- res = AVERROR_INVALIDDATA;
- break;
- } else if ((res = ebml_read_master(matroska, &id)) < 0)
- break;
- videotrack = (MatroskaVideoTrack *)track;
-
- while (res == 0) {
- if (!(id = ebml_peek_id(matroska, &matroska->level_up))) {
- res = AVERROR(EIO);
- break;
- } else if (matroska->level_up > 0) {
- matroska->level_up--;
- break;
- }
-
- switch (id) {
- /* fixme, this should be one-up, but I get it here */
- case MATROSKA_ID_TRACKDEFAULTDURATION: {
- uint64_t num;
- if ((res = ebml_read_uint (matroska, &id,
- &num)) < 0)
- break;
- track->default_duration = num;
- break;
- }
-
- /* video framerate */
- case MATROSKA_ID_VIDEOFRAMERATE: {
- double num;
- if ((res = ebml_read_float(matroska, &id,
- &num)) < 0)
- break;
- if (!track->default_duration)
- track->default_duration = 1000000000/num;
- break;
- }
-
- /* width of the size to display the video at */
- case MATROSKA_ID_VIDEODISPLAYWIDTH: {
- uint64_t num;
- if ((res = ebml_read_uint(matroska, &id,
- &num)) < 0)
- break;
- videotrack->display_width = num;
- break;
- }
-
- /* height of the size to display the video at */
- case MATROSKA_ID_VIDEODISPLAYHEIGHT: {
- uint64_t num;
- if ((res = ebml_read_uint(matroska, &id,
- &num)) < 0)
- break;
- videotrack->display_height = num;
- break;
- }
-
- /* width of the video in the file */
- case MATROSKA_ID_VIDEOPIXELWIDTH: {
- uint64_t num;
- if ((res = ebml_read_uint(matroska, &id,
- &num)) < 0)
- break;
- videotrack->pixel_width = num;
- break;
- }
-
- /* height of the video in the file */
- case MATROSKA_ID_VIDEOPIXELHEIGHT: {
- uint64_t num;
- if ((res = ebml_read_uint(matroska, &id,
- &num)) < 0)
- break;
- videotrack->pixel_height = num;
- break;
- }
-
- /* whether the video is interlaced */
- case MATROSKA_ID_VIDEOFLAGINTERLACED: {
- uint64_t num;
- if ((res = ebml_read_uint(matroska, &id,
- &num)) < 0)
- break;
- break;
- }
-
- /* colorspace (only matters for raw video)
- * fourcc */
- case MATROSKA_ID_VIDEOCOLORSPACE: {
- uint64_t num;
- if ((res = ebml_read_uint(matroska, &id,
- &num)) < 0)
- break;
- videotrack->fourcc = num;
- break;
- }
-
- default:
- av_log(matroska->ctx, AV_LOG_INFO,
- "Unknown video track header entry "
- "0x%x - ignoring\n", id);
- /* pass-through */
-
- case MATROSKA_ID_VIDEOSTEREOMODE:
- case MATROSKA_ID_VIDEOASPECTRATIO:
- case EBML_ID_VOID:
- res = ebml_read_skip(matroska);
- break;
- }
-
- if (matroska->level_up) {
- matroska->level_up--;
- break;
- }
- }
- break;
- }
-
- /* tracktype specific stuff for audio */
- case MATROSKA_ID_TRACKAUDIO: {
- MatroskaAudioTrack *audiotrack;
- if (!track->type)
- track->type = MATROSKA_TRACK_TYPE_AUDIO;
- if (track->type != MATROSKA_TRACK_TYPE_AUDIO) {
- av_log(matroska->ctx, AV_LOG_INFO,
- "audio data in non-audio track - ignoring\n");
- res = AVERROR_INVALIDDATA;
- break;
- } else if ((res = ebml_read_master(matroska, &id)) < 0)
- break;
- audiotrack = (MatroskaAudioTrack *)track;
- audiotrack->channels = 1;
- audiotrack->samplerate = 8000;
-
- while (res == 0) {
- if (!(id = ebml_peek_id(matroska, &matroska->level_up))) {
- res = AVERROR(EIO);
- break;
- } else if (matroska->level_up > 0) {
- matroska->level_up--;
- break;
- }
-
- switch (id) {
- /* samplerate */
- case MATROSKA_ID_AUDIOSAMPLINGFREQ: {
- double num;
- if ((res = ebml_read_float(matroska, &id,
- &num)) < 0)
- break;
- audiotrack->internal_samplerate =
- audiotrack->samplerate = num;
- break;
- }
-
- case MATROSKA_ID_AUDIOOUTSAMPLINGFREQ: {
- double num;
- if ((res = ebml_read_float(matroska, &id,
- &num)) < 0)
- break;
- audiotrack->samplerate = num;
- break;
- }
-
- /* bitdepth */
- case MATROSKA_ID_AUDIOBITDEPTH: {
- uint64_t num;
- if ((res = ebml_read_uint(matroska, &id,
- &num)) < 0)
- break;
- audiotrack->bitdepth = num;
- break;
- }
-
- /* channels */
- case MATROSKA_ID_AUDIOCHANNELS: {
- uint64_t num;
- if ((res = ebml_read_uint(matroska, &id,
- &num)) < 0)
- break;
- audiotrack->channels = num;
- break;
- }
-
- default:
- av_log(matroska->ctx, AV_LOG_INFO,
- "Unknown audio track header entry "
- "0x%x - ignoring\n", id);
- /* pass-through */
-
- case EBML_ID_VOID:
- res = ebml_read_skip(matroska);
- break;
- }
-
- if (matroska->level_up) {
- matroska->level_up--;
- break;
- }
- }
- break;
- }
-
- /* codec identifier */
- case MATROSKA_ID_CODECID: {
- char *text;
- if ((res = ebml_read_ascii(matroska, &id, &text)) < 0)
- break;
- track->codec_id = text;
- break;
- }
-
- /* codec private data */
- case MATROSKA_ID_CODECPRIVATE: {
- uint8_t *data;
- int size;
- if ((res = ebml_read_binary(matroska, &id, &data, &size) < 0))
- break;
- track->codec_priv = data;
- track->codec_priv_size = size;
- break;
- }
-
- /* name of this track */
- case MATROSKA_ID_TRACKNAME: {
- char *text;
- if ((res = ebml_read_utf8(matroska, &id, &text)) < 0)
- break;
- track->name = text;
- break;
- }
-
- /* language (matters for audio/subtitles, mostly) */
- case MATROSKA_ID_TRACKLANGUAGE: {
- char *text, *end;
- if ((res = ebml_read_utf8(matroska, &id, &text)) < 0)
- break;
- if ((end = strchr(text, '-')))
- *end = '\0';
- if (strlen(text) == 3)
- strcpy(track->language, text);
- av_free(text);
- break;
- }
-
- /* whether this is actually used */
- case MATROSKA_ID_TRACKFLAGENABLED: {
- uint64_t num;
- if ((res = ebml_read_uint(matroska, &id, &num)) < 0)
- break;
- break;
- }
-
- /* whether it's the default for this track type */
- case MATROSKA_ID_TRACKFLAGDEFAULT: {
- uint64_t num;
- if ((res = ebml_read_uint(matroska, &id, &num)) < 0)
- break;
- track->flag_default = num;
- break;
- }
-
- /* lacing (like MPEG, where blocks don't end/start on frame
- * boundaries) */
- case MATROSKA_ID_TRACKFLAGLACING: {
- uint64_t num;
- if ((res = ebml_read_uint(matroska, &id, &num)) < 0)
- break;
- break;
- }
-
- /* default length (in time) of one data block in this track */
- case MATROSKA_ID_TRACKDEFAULTDURATION: {
- uint64_t num;
- if ((res = ebml_read_uint(matroska, &id, &num)) < 0)
- break;
- track->default_duration = num;
- break;
- }
-
- case MATROSKA_ID_TRACKCONTENTENCODINGS: {
- if ((res = ebml_read_master(matroska, &id)) < 0)
- break;
-
- while (res == 0) {
- if (!(id = ebml_peek_id(matroska, &matroska->level_up))) {
- res = AVERROR(EIO);
- break;
- } else if (matroska->level_up > 0) {
- matroska->level_up--;
- break;
- }
-
- switch (id) {
- case MATROSKA_ID_TRACKCONTENTENCODING: {
- int encoding_scope = 1;
- if ((res = ebml_read_master(matroska, &id)) < 0)
- break;
-
- while (res == 0) {
- if (!(id = ebml_peek_id(matroska, &matroska->level_up))) {
- res = AVERROR(EIO);
- break;
- } else if (matroska->level_up > 0) {
- matroska->level_up--;
- break;
- }
-
- switch (id) {
- case MATROSKA_ID_ENCODINGSCOPE: {
- uint64_t num;
- if ((res = ebml_read_uint(matroska, &id, &num)) < 0)
- break;
- encoding_scope = num;
- break;
- }
-
- case MATROSKA_ID_ENCODINGTYPE: {
- uint64_t num;
- if ((res = ebml_read_uint(matroska, &id, &num)) < 0)
- break;
- if (num)
- av_log(matroska->ctx, AV_LOG_ERROR,
- "Unsupported encoding type");
- break;
- }
-
- case MATROSKA_ID_ENCODINGCOMPRESSION: {
- if ((res = ebml_read_master(matroska, &id)) < 0)
- break;
-
- while (res == 0) {
- if (!(id = ebml_peek_id(matroska, &matroska->level_up))) {
- res = AVERROR(EIO);
- break;
- } else if (matroska->level_up > 0) {
- matroska->level_up--;
- break;
- }
-
- switch (id) {
- case MATROSKA_ID_ENCODINGCOMPALGO: {
- uint64_t num;
- if ((res = ebml_read_uint(matroska, &id, &num)) < 0)
- break;
- if (num != MATROSKA_TRACK_ENCODING_COMP_HEADERSTRIP &&
-#ifdef CONFIG_ZLIB
- num != MATROSKA_TRACK_ENCODING_COMP_ZLIB &&
-#endif
-#ifdef CONFIG_BZLIB
- num != MATROSKA_TRACK_ENCODING_COMP_BZLIB &&
-#endif
- num != MATROSKA_TRACK_ENCODING_COMP_LZO)
- av_log(matroska->ctx, AV_LOG_ERROR,
- "Unsupported compression algo\n");
- track->encoding_algo = num;
- break;
- }
-
- case MATROSKA_ID_ENCODINGCOMPSETTINGS: {
- uint8_t *data;
- int size;
- if ((res = ebml_read_binary(matroska, &id, &data, &size) < 0))
- break;
- track->encoding_settings = data;
- track->encoding_settings_len = size;
- break;
- }
-
- default:
- av_log(matroska->ctx, AV_LOG_INFO,
- "Unknown compression header entry "
- "0x%x - ignoring\n", id);
- /* pass-through */
-
- case EBML_ID_VOID:
- res = ebml_read_skip(matroska);
- break;
- }
-
- if (matroska->level_up) {
- matroska->level_up--;
- break;
- }
- }
- break;
- }
-
- default:
- av_log(matroska->ctx, AV_LOG_INFO,
- "Unknown content encoding header entry "
- "0x%x - ignoring\n", id);
- /* pass-through */
-
- case EBML_ID_VOID:
- res = ebml_read_skip(matroska);
- break;
- }
-
- if (matroska->level_up) {
- matroska->level_up--;
- break;
- }
- }
-
- track->encoding_scope = encoding_scope;
- break;
- }
-
- default:
- av_log(matroska->ctx, AV_LOG_INFO,
- "Unknown content encodings header entry "
- "0x%x - ignoring\n", id);
- /* pass-through */
-
- case EBML_ID_VOID:
- res = ebml_read_skip(matroska);
- break;
- }
-
- if (matroska->level_up) {
- matroska->level_up--;
- break;
- }
- }
- break;
- }
-
- case MATROSKA_ID_TRACKTIMECODESCALE: {
- double num;
- if ((res = ebml_read_float(matroska, &id, &num)) < 0)
- break;
- track->time_scale = num;
- break;
- }
-
- default:
- av_log(matroska->ctx, AV_LOG_INFO,
- "Unknown track header entry 0x%x - ignoring\n", id);
- /* pass-through */
-
- case EBML_ID_VOID:
- /* we ignore these because they're nothing useful. */
- case MATROSKA_ID_TRACKFLAGFORCED:
- case MATROSKA_ID_CODECNAME:
- case MATROSKA_ID_CODECDECODEALL:
- case MATROSKA_ID_CODECINFOURL:
- case MATROSKA_ID_CODECDOWNLOADURL:
- case MATROSKA_ID_TRACKMINCACHE:
- case MATROSKA_ID_TRACKMAXCACHE:
- res = ebml_read_skip(matroska);
- break;
- }
-
- if (matroska->level_up) {
- matroska->level_up--;
- break;
- }