// 8.7.3.2 Sample Size Box (p57) int mov_read_stsz(struct mov_t* mov, const struct mov_box_t* box) { uint32_t i = 0, sample_size, sample_count; struct mov_track_t* track = mov->track; mov_buffer_r8(&mov->io); /* version */ mov_buffer_r24(&mov->io); /* flags */ sample_size = mov_buffer_r32(&mov->io); sample_count = mov_buffer_r32(&mov->io); assert(0 == track->sample_count && NULL == track->samples); // duplicated STSZ atom if (track->sample_count < sample_count) { void* p = malloc(sizeof(struct mov_sample_t) * (sample_count + 1)); if (NULL == p) return ENOMEM; track->samples = (struct mov_sample_t*)p; } track->sample_count = sample_count; if (0 == sample_size) { for (i = 0; i < sample_count; i++) track->samples[i].bytes = mov_buffer_r32(&mov->io); // uint32_t entry_size } else { for (i = 0; i < sample_count; i++) track->samples[i].bytes = sample_size; } (void)box; return mov_buffer_error(&mov->io); }
// 8.6.1.2 Decoding Time to Sample Box (p47) int mov_read_stts(struct mov_t* mov, const struct mov_box_t* box) { uint32_t i, entry_count; struct mov_stbl_t* stbl = &mov->track->stbl; mov_buffer_r8(&mov->io); /* version */ mov_buffer_r24(&mov->io); /* flags */ entry_count = mov_buffer_r32(&mov->io); assert(0 == stbl->stts_count && NULL == stbl->stts); // duplicated STTS atom if (stbl->stts_count < entry_count) { void* p = realloc(stbl->stts, sizeof(struct mov_stts_t) * entry_count); if (NULL == p) return ENOMEM; stbl->stts = (struct mov_stts_t*)p; } stbl->stts_count = entry_count; for (i = 0; i < entry_count; i++) { stbl->stts[i].sample_count = mov_buffer_r32(&mov->io); stbl->stts[i].sample_delta = mov_buffer_r32(&mov->io); } (void)box; return mov_buffer_error(&mov->io); }
// 8.6.1.4 Composition to Decode Box (p53) int mov_read_cslg(struct mov_t* mov, const struct mov_box_t* box) { uint8_t version; // struct mov_stbl_t* stbl = &mov->track->stbl; version = (uint8_t)mov_buffer_r8(&mov->io); /* version */ mov_buffer_r24(&mov->io); /* flags */ if (0 == version) { (int32_t)mov_buffer_r32(&mov->io); /* compositionToDTSShift */ (int32_t)mov_buffer_r32(&mov->io); /* leastDecodeToDisplayDelta */ (int32_t)mov_buffer_r32(&mov->io); /* greatestDecodeToDisplayDelta */ (int32_t)mov_buffer_r32(&mov->io); /* compositionStartTime */ (int32_t)mov_buffer_r32(&mov->io); /* compositionEndTime */ } else { (int64_t)mov_buffer_r64(&mov->io); (int64_t)mov_buffer_r64(&mov->io); (int64_t)mov_buffer_r64(&mov->io); (int64_t)mov_buffer_r64(&mov->io); (int64_t)mov_buffer_r64(&mov->io); } (void)box; return mov_buffer_error(&mov->io); }
int mov_read_avcc(struct mov_t* mov, const struct mov_box_t* box) { struct mov_track_t* track = mov->track; struct mov_sample_entry_t* entry = track->stsd.current; if (entry->extra_data_size < box->size) { void* p = realloc(entry->extra_data, (size_t)box->size); if (NULL == p) return ENOMEM; entry->extra_data = p; } mov_buffer_read(&mov->io, entry->extra_data, box->size); entry->extra_data_size = (size_t)box->size; return mov_buffer_error(&mov->io); }
// 8.8.2 Movie Extends Header Box (p68) int mov_read_mehd(struct mov_t* mov, const struct mov_box_t* box) { unsigned int version; uint64_t fragment_duration; version = mov_buffer_r8(&mov->io); /* version */ mov_buffer_r24(&mov->io); /* flags */ if (1 == version) fragment_duration = mov_buffer_r64(&mov->io); /* fragment_duration*/ else fragment_duration = mov_buffer_r32(&mov->io); /* fragment_duration*/ (void)box; assert(fragment_duration <= mov->mvhd.duration); return mov_buffer_error(&mov->io); }