41 lines
1.3 KiB
C
41 lines
1.3 KiB
C
#include "mov-internal.h"
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#include <assert.h>
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#include <stdlib.h>
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#include <errno.h>
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// https://www.webmproject.org/vp9/mp4/
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// extra data: VPCodecConfigurationBox
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int mov_read_vpcc(struct mov_t* mov, const struct mov_box_t* box)
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{
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struct mov_track_t* track = mov->track;
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struct mov_sample_entry_t* entry = track->stsd.current;
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if(box->size < 4)
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return -1;
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if (entry->extra_data_size < box->size-4)
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{
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void* p = realloc(entry->extra_data, (size_t)box->size-4);
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if (NULL == p) return -ENOMEM;
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entry->extra_data = p;
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}
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mov_buffer_r8(&mov->io); /* version */
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mov_buffer_r24(&mov->io); /* flags */
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mov_buffer_read(&mov->io, entry->extra_data, box->size-4);
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entry->extra_data_size = (int)box->size - 4;
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return mov_buffer_error(&mov->io);
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}
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size_t mov_write_vpcc(const struct mov_t* mov)
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{
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const struct mov_track_t* track = mov->track;
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const struct mov_sample_entry_t* entry = track->stsd.current;
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mov_buffer_w32(&mov->io, entry->extra_data_size + 12); /* size */
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mov_buffer_write(&mov->io, "vpcC", 4);
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mov_buffer_w8(&mov->io, 1); /* version */
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mov_buffer_w24(&mov->io, 0); /* flags */
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if (entry->extra_data_size > 0)
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mov_buffer_write(&mov->io, entry->extra_data, entry->extra_data_size);
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return entry->extra_data_size + 12;
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}
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