matrix.c

来自「MPEG-4编解码的实现(包括MPEG4视音频编解码)」· C语言 代码 · 共 43 行

#include "quicktime.h"




int quicktime_matrix_init(quicktime_matrix_t *matrix)
{
	int i;
	for(i = 0; i < 9; i++) matrix->values[i] = 0;
	matrix->values[0] = matrix->values[4] = 1;
	matrix->values[8] = 16384;
}

int quicktime_matrix_delete(quicktime_matrix_t *matrix)
{
}

int quicktime_read_matrix(quicktime_t *file, quicktime_matrix_t *matrix)
{
	int i = 0;
	for(i = 0; i < 9; i++)
	{
		matrix->values[i] = quicktime_read_fixed32(file);
	}
}

int quicktime_matrix_dump(quicktime_matrix_t *matrix)
{
	int i;
	printf("   matrix");
	for(i = 0; i < 9; i++) printf(" %f", matrix->values[i]);
	printf("\n");
}

int quicktime_write_matrix(quicktime_t *file, quicktime_matrix_t *matrix)
{
	int i;
	for(i = 0; i < 9; i++)
	{
		quicktime_write_fixed32(file, matrix->values[i]);
	}
}