?? matroska.c
字號:
/* tracktype specific stuff for video */ case MATROSKA_ID_TRACKVIDEO: { MatroskaVideoTrack *videotrack; 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_IO; 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; track->default_duration = 1000000000 * (1. / 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; if (num) track->flags |= MATROSKA_VIDEOTRACK_INTERLACED; else track->flags &= ~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 MATROSKA_ID_VIDEOSTEREOMODE: { uint64_t num; if ((res = ebml_read_uint(matroska, &id, &num)) < 0) break; if (num != MATROSKA_EYE_MODE_MONO && num != MATROSKA_EYE_MODE_LEFT && num != MATROSKA_EYE_MODE_RIGHT && num != MATROSKA_EYE_MODE_BOTH) { av_log(matroska->ctx, AV_LOG_INFO, "Ignoring unknown eye mode 0x%x\n", (uint32_t) num); break; } videotrack->eye_mode = num; break; } /* aspect ratio behaviour */ case MATROSKA_ID_VIDEOASPECTRATIO: { uint64_t num; if ((res = ebml_read_uint(matroska, &id, &num)) < 0) break; if (num != MATROSKA_ASPECT_RATIO_MODE_FREE && num != MATROSKA_ASPECT_RATIO_MODE_KEEP && num != MATROSKA_ASPECT_RATIO_MODE_FIXED) { av_log(matroska->ctx, AV_LOG_INFO, "Ignoring unknown aspect ratio 0x%x\n", (uint32_t) num); break; } videotrack->ar_mode = num; break; } /* colourspace (only matters for raw video) * fourcc */ case MATROSKA_ID_VIDEOCOLOURSPACE: { 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 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 != 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; while (res == 0) { if (!(id = ebml_peek_id(matroska, &matroska->level_up))) { res = AVERROR_IO; 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->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 the codec */ case MATROSKA_ID_CODECNAME: { char *text; if ((res = ebml_read_utf8(matroska, &id, &text)) < 0) break; track->codec_name = text; 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; if ((res = ebml_read_utf8(matroska, &id, &text)) < 0) break; track->language = text; break; } /* whether this is actually used */ case MATROSKA_ID_TRACKFLAGENABLED: { uint64_t num; if ((res = ebml_read_uint(matroska, &id, &num)) < 0) break; if (num) track->flags |= MATROSKA_TRACK_ENABLED; else track->flags &= ~MATROSKA_TRACK_ENABLED; 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; if (num) track->flags |= MATROSKA_TRACK_DEFAULT; else track->flags &= ~MATROSKA_TRACK_DEFAULT; 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; if (num) track->flags |= MATROSKA_TRACK_LACING; else track->flags &= ~MATROSKA_TRACK_LACING; 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; } 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_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; } } return res;}static intmatroska_parse_tracks (MatroskaDemuxContext *matroska){ int res = 0; uint32_t id; av_log(matroska->ctx, AV_LOG_DEBUG, "parsing tracks...\n"); while (res == 0) { if (!(id = ebml_peek_id(matroska, &matroska->level_up))) { res = AVERROR_IO; break; } else if (matroska->level_up) { matroska->level_up--; break; } switch (id) { /* one track within the "all-tracks" header */ case MATROSKA_ID_TRACKENTRY: res = matroska_add_stream(matroska); break; default: av_log(matroska->ctx, AV_LOG_INFO, "Unknown entry 0x%x in track header\n", id); /* fall-through */ case EBML_ID_VOID: res = ebml_read_skip(matroska); break; } if (matroska->level_up) { matroska->level_up--; break; } } return res;}static intmatroska_parse_index (MatroskaDemuxContext *matroska){ int res = 0; uint32_t id; MatroskaDemuxIndex idx; av_log(matroska->ctx, AV_LOG_DEBUG, "parsing index...\n"); while (res == 0) { if (!(id = ebml_peek_id(matroska, &matroska->level_up))) { res = AVERROR_IO; break; } else if (matroska->level_up) { matroska->level_up--; break;?? 快捷鍵說明
復制代碼
Ctrl + C
搜索代碼
Ctrl + F
全屏模式
F11
切換主題
Ctrl + Shift + D
顯示快捷鍵
?
增大字號
Ctrl + =
減小字號
Ctrl + -