gmin.c

MPEG-4编解码的实现(包括MPEG4视音频编解码)

#include "quicktime.h"




int quicktime_gmin_init(quicktime_gmin_t *gmin)
{
	gmin->version = 0;
	gmin->flags = 0;
	gmin->graphics_mode = 64;
	gmin->opcolor[0] = 32768;
	gmin->opcolor[1] = 32768;
	gmin->opcolor[2] = 32768;
	gmin->balance = 0;
	gmin->reserved = 0;
}

int quicktime_gmin_delete(quicktime_gmin_t *gmin)
{
}

int quicktime_gmin_dump(quicktime_gmin_t *gmin)
{
	printf("     generic media info\n");
	printf("      version %d\n", gmin->version);
	printf("      flags %d\n", gmin->flags);
	printf("      graphics_mode %d\n", gmin->graphics_mode);
	printf("      opcolor %d %d %d\n", gmin->opcolor[0], gmin->opcolor[1], gmin->opcolor[2]);
	printf("      balance %d\n", gmin->balance);
	printf("      reserved %d\n", gmin->reserved);
}

int quicktime_read_gmin(quicktime_t *file, quicktime_gmin_t *gmin)
{
	int i;

	gmin->version = quicktime_read_char(file);
	gmin->flags = quicktime_read_int24(file);
	gmin->graphics_mode = quicktime_read_int16(file);
	for(i = 0; i < 3; i++)
		gmin->opcolor[i] = quicktime_read_int16(file);
	gmin->balance = quicktime_read_int16(file);
	gmin->reserved = quicktime_read_int16(file);
}

int quicktime_write_gmin(quicktime_t *file, quicktime_gmin_t *gmin)
{
	int i;
	quicktime_atom_t atom;

	quicktime_atom_write_header(file, &atom, "gmin");

	quicktime_write_char(file, gmin->version);
	quicktime_write_int24(file, gmin->flags);
	quicktime_write_int16(file, gmin->graphics_mode);
	for(i = 0; i < 3; i++)
		quicktime_write_int16(file, gmin->opcolor[i]);
	quicktime_write_int16(file, gmin->balance);
	quicktime_write_int16(file, gmin->reserved);

	quicktime_atom_write_footer(file, &atom);
}