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Unix_Linux

stts.c：源码内容

							#include "quicktime.h"
int quicktime_stts_init(quicktime_stts_t *stts)
{
	stts->version = 0;
	stts->flags = 0;
	stts->total_entries = 0;
}
int quicktime_stts_init_table(quicktime_stts_t *stts)
{
	if(!stts->total_entries)
	{
		stts->total_entries = 1;
		stts->table = (quicktime_stts_table_t*)malloc(sizeof(quicktime_stts_table_t) * stts->total_entries);
	}
}
int quicktime_stts_init_video(quicktime_t *file, quicktime_stts_t *stts, float frame_rate)
{
	quicktime_stts_table_t *table;
	quicktime_stts_init_table(stts);
	table = &(stts->table[0]);
	table->sample_count = 0;      // need to set this when closing
	table->sample_duration = file->moov.mvhd.time_scale / frame_rate;
}
int quicktime_stts_init_audio(quicktime_t *file, quicktime_stts_t *stts, int sample_rate)
{
	quicktime_stts_table_t *table;
	quicktime_stts_init_table(stts);
	table = &(stts->table[0]);
	table->sample_count = 0;     // need to set this when closing
	table->sample_duration = 1;
}
int quicktime_stts_delete(quicktime_stts_t *stts)
{
	if(stts->total_entries) free(stts->table);
	stts->total_entries = 0;
}
int quicktime_stts_dump(quicktime_stts_t *stts)
{
	int i;
	printf("     time to samplen");
	printf("      version %dn", stts->version);
	printf("      flags %dn", stts->flags);
	printf("      total_entries %dn", stts->total_entries);
	for(i = 0; i < stts->total_entries; i++)
	{
		printf("       count %ld duration %ldn", stts->table[i].sample_count, stts->table[i].sample_duration);
	}
}
int quicktime_read_stts(quicktime_t *file, quicktime_stts_t *stts)
{
	int i;
	stts->version = quicktime_read_char(file);
	stts->flags = quicktime_read_int24(file);
	stts->total_entries = quicktime_read_int32(file);
	stts->table = (quicktime_stts_table_t*)malloc(sizeof(quicktime_stts_table_t) * stts->total_entries);
	for(i = 0; i < stts->total_entries; i++)
	{
		stts->table[i].sample_count = quicktime_read_int32(file);
		stts->table[i].sample_duration = quicktime_read_int32(file);
	}
}
int quicktime_write_stts(quicktime_t *file, quicktime_stts_t *stts)
{
	int i;
	quicktime_atom_t atom;
	quicktime_atom_write_header(file, &atom, "stts");
	quicktime_write_char(file, stts->version);
	quicktime_write_int24(file, stts->flags);
	quicktime_write_int32(file, stts->total_entries);
	for(i = 0; i < stts->total_entries; i++)
	{
		quicktime_write_int32(file, stts->table[i].sample_count);
		quicktime_write_int32(file, stts->table[i].sample_duration);
	}
	quicktime_atom_write_footer(file, &atom);
}

						