55 lines
1.6 KiB
C
55 lines
1.6 KiB
C
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#include "mov-internal.h"
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#include <assert.h>
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// 4.3 File Type Box (p17)
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int mov_read_ftyp(struct mov_t* mov, const struct mov_box_t* box)
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{
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if(box->size < 8) return -1;
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mov->ftyp.major_brand = mov_buffer_r32(&mov->io);
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mov->ftyp.minor_version = mov_buffer_r32(&mov->io);
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for(mov->ftyp.brands_count = 0; mov->ftyp.brands_count < N_BRAND && (uint64_t)mov->ftyp.brands_count * 4 < box->size - 8; ++mov->ftyp.brands_count)
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{
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mov->ftyp.compatible_brands[mov->ftyp.brands_count] = mov_buffer_r32(&mov->io);
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}
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assert(box->size == 4 * (uint64_t)mov->ftyp.brands_count + 8);
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mov_buffer_skip(&mov->io, box->size - 4 * (uint64_t)mov->ftyp.brands_count - 8 ); // skip compatible_brands
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return 0;
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}
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size_t mov_write_ftyp(const struct mov_t* mov)
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{
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int size, i;
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size = 8/* box */ + 8/* item */ + mov->ftyp.brands_count * 4 /* compatible brands */;
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mov_buffer_w32(&mov->io, size); /* size */
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mov_buffer_write(&mov->io, "ftyp", 4);
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mov_buffer_w32(&mov->io, mov->ftyp.major_brand);
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mov_buffer_w32(&mov->io, mov->ftyp.minor_version);
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for (i = 0; i < mov->ftyp.brands_count; i++)
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mov_buffer_w32(&mov->io, mov->ftyp.compatible_brands[i]);
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return size;
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}
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size_t mov_write_styp(const struct mov_t* mov)
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{
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int size, i;
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size = 8/* box */ + 8/* item */ + mov->ftyp.brands_count * 4 /* compatible brands */;
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mov_buffer_w32(&mov->io, size); /* size */
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mov_buffer_write(&mov->io, "styp", 4);
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mov_buffer_w32(&mov->io, mov->ftyp.major_brand);
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mov_buffer_w32(&mov->io, mov->ftyp.minor_version);
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for (i = 0; i < mov->ftyp.brands_count; i++)
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mov_buffer_w32(&mov->io, mov->ftyp.compatible_brands[i]);
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return size;
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}
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