多媒体

开发平台：
Unix_Linux

stsdtable.c：源码内容
							#include "quicktime.h"
int quicktime_stsd_table_init(quicktime_stsd_table_t *table)
{
	int i;
	table->format[0] = 'y';
	table->format[1] = 'u';
	table->format[2] = 'v';
	table->format[3] = '2';
	for(i = 0; i < 6; i++) table->reserved[i] = 0;
	table->data_reference = 1;
	table->version = 0;
	table->revision = 0;
 	table->vendor[0] = 'l';
 	table->vendor[1] = 'n';
 	table->vendor[2] = 'u';
 	table->vendor[3] = 'x';
	table->temporal_quality = 0;
	table->spatial_quality = 258;
	table->width = 0;
	table->height = 0;
	table->dpi_horizontal = 72;
	table->dpi_vertical = 72;
	table->data_size = 0;
	table->frames_per_sample = 1;
	for(i = 0; i < 32; i++) table->compressor_name[i] = 0;
	sprintf(table->compressor_name, "Linux Quicktime");
	table->depth = 24;
	table->ctab_id = 65535;
	quicktime_ctab_init(&(table->ctab));
	table->gamma = 0;
	table->fields = 0;
	quicktime_mjqt_init(&(table->mjqt));
	quicktime_mjht_init(&(table->mjht));
	
	table->channels = 0;
	table->sample_size = 0;
	table->compression_id = 0;
	table->packet_size = 0;
	table->sample_rate = 0;
}
int quicktime_stsd_table_delete(quicktime_stsd_table_t *table)
{
	quicktime_ctab_delete(&(table->ctab));
	quicktime_mjqt_delete(&(table->mjqt));
	quicktime_mjht_delete(&(table->mjht));
}
int quicktime_stsd_table_dump(void *minf_ptr, quicktime_stsd_table_t *table)
{
	quicktime_minf_t *minf = minf_ptr;
	printf("       format %c%c%c%cn", table->format[0], table->format[1], table->format[2], table->format[3]);
	quicktime_print_chars("       reserved ", table->reserved, 6);
	printf("       data_reference %dn", table->data_reference);
	if(minf->is_audio) quicktime_stsd_audio_dump(table);
	if(minf->is_video) quicktime_stsd_video_dump(table);
}
int quicktime_stsd_audio_dump(quicktime_stsd_table_t *table)
{
	printf("       version %dn", table->version);
	printf("       revision %dn", table->revision);
	printf("       vendor %c%c%c%cn", table->vendor[0], table->vendor[1], table->vendor[2], table->vendor[3]);
	printf("       channels %dn", table->channels);
	printf("       sample_size %dn", table->sample_size);
	printf("       compression_id %dn", table->compression_id);
	printf("       packet_size %dn", table->packet_size);
	printf("       sample_rate %fn", table->sample_rate);
}
int quicktime_stsd_video_dump(quicktime_stsd_table_t *table)
{
	printf("       version %dn", table->version);
	printf("       revision %dn", table->revision);
	printf("       vendor %c%c%c%cn", table->vendor[0], table->vendor[1], table->vendor[2], table->vendor[3]);
	printf("       temporal_quality %ldn", table->temporal_quality);
	printf("       spatial_quality %ldn", table->spatial_quality);
	printf("       width %dn", table->width);
	printf("       height %dn", table->height);
	printf("       dpi_horizontal %fn", table->dpi_horizontal);
	printf("       dpi_vertical %fn", table->dpi_vertical);
	printf("       data_size %ldn", table->data_size);
	printf("       frames_per_sample %dn", table->frames_per_sample);
	printf("       compressor_name %sn", table->compressor_name);
	printf("       depth %dn", table->depth);
	printf("       ctab_id %dn", table->ctab_id);
	printf("       gamma %fn", table->gamma);
	printf("       fields %dn", table->fields);
	if(!table->ctab_id) quicktime_ctab_dump(&(table->ctab));
	quicktime_mjqt_dump(&(table->mjqt));
	quicktime_mjht_dump(&(table->mjht));
}
int quicktime_read_stsd_table(quicktime_t *file, quicktime_minf_t *minf, quicktime_stsd_table_t *table)
{
	quicktime_atom_t leaf_atom;
	quicktime_atom_read_header(file->stream, &leaf_atom);
	
	table->format[0] = leaf_atom.type[0];
	table->format[1] = leaf_atom.type[1];
	table->format[2] = leaf_atom.type[2];
	table->format[3] = leaf_atom.type[3];
	quicktime_read_data(file, table->reserved, 6);
	table->data_reference = quicktime_read_int16(file);
	if(minf->is_audio) quicktime_read_stsd_audio(file, table, &leaf_atom);
	if(minf->is_video) quicktime_read_stsd_video(file, table, &leaf_atom);
}
int quicktime_write_stsd_table(quicktime_t *file, quicktime_minf_t *minf, quicktime_stsd_table_t *table)
{
	quicktime_atom_t atom;
	quicktime_atom_write_header(file, &atom, table->format);
	quicktime_write_data(file, table->reserved, 6);
	quicktime_write_int16(file, table->data_reference);
	
	if(minf->is_audio) quicktime_write_stsd_audio(file, table);
	if(minf->is_video) quicktime_write_stsd_video(file, table);
	quicktime_atom_write_footer(file, &atom);
}
int quicktime_read_stsd_audio(quicktime_t *file, quicktime_stsd_table_t *table, quicktime_atom_t *parent_atom)
{
	table->version = quicktime_read_int16(file);
	table->revision = quicktime_read_int16(file);
	quicktime_read_data(file, table->vendor, 4);
	table->channels = quicktime_read_int16(file);
	table->sample_size = quicktime_read_int16(file);
	table->compression_id = quicktime_read_int16(file);
	table->packet_size = quicktime_read_int16(file);
	table->sample_rate = quicktime_read_fixed32(file);
}
int quicktime_write_stsd_audio(quicktime_t *file, quicktime_stsd_table_t *table)
{
	quicktime_write_int16(file, table->version);
	quicktime_write_int16(file, table->revision);
	quicktime_write_data(file, table->vendor, 4);
	quicktime_write_int16(file, table->channels);
	quicktime_write_int16(file, table->sample_size);
	quicktime_write_int16(file, table->compression_id);
	quicktime_write_int16(file, table->packet_size);
	quicktime_write_fixed32(file, table->sample_rate);
}
int quicktime_read_stsd_video(quicktime_t *file, quicktime_stsd_table_t *table, quicktime_atom_t *parent_atom)
{
	quicktime_atom_t leaf_atom;
	int len;
	
	table->version = quicktime_read_int16(file);
	table->revision = quicktime_read_int16(file);
	quicktime_read_data(file, table->vendor, 4);
	table->temporal_quality = quicktime_read_int32(file);
	table->spatial_quality = quicktime_read_int32(file);
	table->width = quicktime_read_int16(file);
	table->height = quicktime_read_int16(file);
	table->dpi_horizontal = quicktime_read_fixed32(file);
	table->dpi_vertical = quicktime_read_fixed32(file);
	table->data_size = quicktime_read_int32(file);
	table->frames_per_sample = quicktime_read_int16(file);
	len = quicktime_read_char(file);
	quicktime_read_data(file, table->compressor_name, 31);
	table->depth = quicktime_read_int16(file);
	table->ctab_id = quicktime_read_int16(file);
	
	while(quicktime_position(file) < parent_atom->end)
	{
		quicktime_atom_read_header(file->stream, &leaf_atom);
		
		if(quicktime_atom_is(&leaf_atom, "ctab"))
		{
			quicktime_read_ctab(file, &(table->ctab));
		}
		else
		if(quicktime_atom_is(&leaf_atom, "gama"))
		{
			table->gamma= quicktime_read_fixed32(file);
		}
		else
		if(quicktime_atom_is(&leaf_atom, "fiel"))
		{
			table->fields = quicktime_read_int16(file);
		}
		else
// 		if(quicktime_atom_is(&leaf_atom, "mjqt"))
// 		{
// 			quicktime_read_mjqt(file, &(table->mjqt));
// 		}
// 		else
// 		if(quicktime_atom_is(&leaf_atom, "mjht"))
// 		{
// 			quicktime_read_mjht(file, &(table->mjht));
// 		}
// 		else
		quicktime_atom_skip(file, &leaf_atom);
	}
}
int quicktime_write_stsd_video(quicktime_t *file, quicktime_stsd_table_t *table)
{
	quicktime_write_int16(file, table->version);
	quicktime_write_int16(file, table->revision);
	quicktime_write_data(file, table->vendor, 4);
	quicktime_write_int32(file, table->temporal_quality);
	quicktime_write_int32(file, table->spatial_quality);
	quicktime_write_int16(file, table->width);
	quicktime_write_int16(file, table->height);
	quicktime_write_fixed32(file, table->dpi_horizontal);
	quicktime_write_fixed32(file, table->dpi_vertical);
	quicktime_write_int32(file, table->data_size);
	quicktime_write_int16(file, table->frames_per_sample);
	quicktime_write_char(file, strlen(table->compressor_name));
	quicktime_write_data(file, table->compressor_name, 31);
	quicktime_write_int16(file, table->depth);
	quicktime_write_int16(file, table->ctab_id);
}
int quicktime_mjqt_init(quicktime_mjqt_t *mjqt)
{
}
int quicktime_mjqt_delete(quicktime_mjqt_t *mjqt)
{
}
int quicktime_mjqt_dump(quicktime_mjqt_t *mjqt)
{
}
int quicktime_mjht_init(quicktime_mjht_t *mjht)
{
}
int quicktime_mjht_delete(quicktime_mjht_t *mjht)
{
}
int quicktime_mjht_dump(quicktime_mjht_t *mjht)
{
}

						