49 lines
1.4 KiB
C
49 lines
1.4 KiB
C
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#include "mov-internal.h"
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#include <errno.h>
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#include <stdint.h>
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#include <stdlib.h>
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#include <assert.h>
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// 8.8.12 Track fragment decode time (p76)
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int mov_read_tfdt(struct mov_t* mov, const struct mov_box_t* box)
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{
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unsigned int version;
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version = mov_buffer_r8(&mov->io); /* version */
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mov_buffer_r24(&mov->io); /* flags */
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if (1 == version)
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mov->track->tfdt_dts = mov_buffer_r64(&mov->io); /* baseMediaDecodeTime */
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else
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mov->track->tfdt_dts = mov_buffer_r32(&mov->io); /* baseMediaDecodeTime */
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// baseMediaDecodeTime + ELST start offset
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mov_apply_elst_tfdt(mov->track);
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(void)box;
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return mov_buffer_error(&mov->io);
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}
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size_t mov_write_tfdt(const struct mov_t* mov)
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{
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uint8_t version;
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uint64_t baseMediaDecodeTime;
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if (mov->track->sample_count < 1)
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return 0;
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baseMediaDecodeTime = mov->track->samples[0].dts - mov->track->start_dts;
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version = baseMediaDecodeTime > INT32_MAX ? 1 : 0;
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mov_buffer_w32(&mov->io, 0 == version ? 16 : 20); /* size */
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mov_buffer_write(&mov->io, "tfdt", 4);
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mov_buffer_w8(&mov->io, version); /* version */
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mov_buffer_w24(&mov->io, 0); /* flags */
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if (1 == version)
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mov_buffer_w64(&mov->io, baseMediaDecodeTime); /* baseMediaDecodeTime */
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else
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mov_buffer_w32(&mov->io, (uint32_t)baseMediaDecodeTime); /* baseMediaDecodeTime */
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return 0 == version ? 16 : 20;
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}
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