static int mov_write_tkhd_tag(AVIOContext *pb, MOVMuxContext *mov, MOVTrack *track, AVStream *st) { int64_t duration = av_rescale_rnd(track->track_duration, MOV_TIMESCALE, track->timescale, AV_ROUND_UP); int version = duration < INT32_MAX ? 0 : 1; int flags = MOV_TKHD_FLAG_IN_MOVIE; int rotation = 0; int group = 0; uint32_t *display_matrix = NULL; int display_matrix_size, i; if (st) { if (mov->per_stream_grouping) group = st->index; else group = st->codecpar->codec_type; display_matrix = (uint32_t*)av_stream_get_side_data(st, AV_PKT_DATA_DISPLAYMATRIX, &display_matrix_size); if (display_matrix && display_matrix_size < 9 * sizeof(*display_matrix)) display_matrix = NULL; } if (track->flags & MOV_TRACK_ENABLED) flags |= MOV_TKHD_FLAG_ENABLED; if (track->mode == MODE_ISM) version = 1; (version == 1) ? avio_wb32(pb, 104) : avio_wb32(pb, 92); /* size */ ffio_wfourcc(pb, "tkhd"); avio_w8(pb, version); avio_wb24(pb, flags); if (version == 1) { avio_wb64(pb, track->time); avio_wb64(pb, track->time); } else { avio_wb32(pb, track->time); /* creation time */ avio_wb32(pb, track->time); /* modification time */ } avio_wb32(pb, track->track_id); /* track-id */ avio_wb32(pb, 0); /* reserved */ if (!track->entry && mov->mode == MODE_ISM) (version == 1) ? avio_wb64(pb, UINT64_C(0xffffffffffffffff)) : avio_wb32(pb, 0xffffffff); else if (!track->entry) (version == 1) ? avio_wb64(pb, 0) : avio_wb32(pb, 0); else (version == 1) ? avio_wb64(pb, duration) : avio_wb32(pb, duration); avio_wb32(pb, 0); /* reserved */ avio_wb32(pb, 0); /* reserved */ avio_wb16(pb, 0); /* layer */ avio_wb16(pb, group); /* alternate group) */ /* Volume, only for audio */ if (track->par->codec_type == AVMEDIA_TYPE_AUDIO) avio_wb16(pb, 0x0100); else avio_wb16(pb, 0); avio_wb16(pb, 0); /* reserved */ /* Matrix structure */ if (st && st->metadata) { AVDictionaryEntry *rot = av_dict_get(st->metadata, "rotate", NULL, 0); rotation = (rot && rot->value) ? atoi(rot->value) : 0; } if (display_matrix) { for (i = 0; i < 9; i++) avio_wb32(pb, display_matrix[i]); } else if (rotation == 90) { write_matrix(pb, 0, 1, -1, 0, track->par->height, 0); } else if (rotation == 180) { write_matrix(pb, -1, 0, 0, -1, track->par->width, track->par->height); } else if (rotation == 270) { write_matrix(pb, 0, -1, 1, 0, 0, track->par->width); } else { write_matrix(pb, 1, 0, 0, 1, 0, 0); } /* Track width and height, for visual only */ if (st && (track->par->codec_type == AVMEDIA_TYPE_VIDEO || track->par->codec_type == AVMEDIA_TYPE_SUBTITLE)) { int64_t track_width_1616; if (track->mode == MODE_MOV) { track_width_1616 = track->par->width * 0x10000ULL; } else { track_width_1616 = av_rescale(st->sample_aspect_ratio.num, track->par->width * 0x10000LL, st->sample_aspect_ratio.den); if (!track_width_1616 || track->height != track->par->height || track_width_1616 > UINT32_MAX) track_width_1616 = track->par->width * 0x10000ULL; } if (track_width_1616 > UINT32_MAX) { av_log(mov->fc, AV_LOG_WARNING, "track width is too large\n"); track_width_1616 = 0; } avio_wb32(pb, track_width_1616); if (track->height > 0xFFFF) { av_log(mov->fc, AV_LOG_WARNING, "track height is too large\n"); avio_wb32(pb, 0); } else avio_wb32(pb, track->height * 0x10000U); } else { avio_wb32(pb, 0); avio_wb32(pb, 0); } return 0x5c; }