stsdtable.c

MPEG-4编解码的实现(包括MPEG4视音频编解码)

#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, "Quicktime for Linux");
	table->depth = 24;
	table->ctab_id = 65535;
	quicktime_ctab_init(&(table->ctab));
	table->gamma = 0;
	table->fields = 0;
	table->field_dominance = 1;
	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;

	table->maxPktSize = 0;
	quicktime_tims_init(&(table->tims));

	quicktime_esds_init(&(table->esds));
}

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));
	quicktime_esds_delete(&(table->esds));
}

int quicktime_stsd_table_dump(void *minf_ptr, quicktime_stsd_table_t *table)
{
	quicktime_minf_t *minf = minf_ptr;
	printf("       format %c%c%c%c\n", table->format[0], table->format[1], table->format[2], table->format[3]);
	quicktime_print_chars("       reserved ", table->reserved, 6);
	printf("       data_reference %d\n", table->data_reference);

	if(minf->is_audio) quicktime_stsd_audio_dump(table);
	if(minf->is_video) quicktime_stsd_video_dump(table);
	if(minf->is_hint)  quicktime_stsd_hint_dump(table);
}

int quicktime_stsd_audio_dump(quicktime_stsd_table_t *table)
{
	printf("       version %d\n", table->version);
	printf("       revision %d\n", table->revision);
	printf("       vendor %c%c%c%c\n", table->vendor[0], table->vendor[1], table->vendor[2], table->vendor[3]);
	printf("       channels %d\n", table->channels);
	printf("       sample_size %d\n", table->sample_size);
	printf("       compression_id %d\n", table->compression_id);
	printf("       packet_size %d\n", table->packet_size);
	printf("       sample_rate %f\n", table->sample_rate);

	quicktime_esds_dump(&(table->esds));
}

int quicktime_stsd_video_dump(quicktime_stsd_table_t *table)
{
	printf("       version %d\n", table->version);
	printf("       revision %d\n", table->revision);
	printf("       vendor %c%c%c%c\n", table->vendor[0], table->vendor[1], table->vendor[2], table->vendor[3]);
	printf("       temporal_quality %ld\n", table->temporal_quality);
	printf("       spatial_quality %ld\n", table->spatial_quality);
	printf("       width %d\n", table->width);
	printf("       height %d\n", table->height);
	printf("       dpi_horizontal %f\n", table->dpi_horizontal);
	printf("       dpi_vertical %f\n", table->dpi_vertical);
	printf("       data_size %ld\n", table->data_size);
	printf("       frames_per_sample %d\n", table->frames_per_sample);
	printf("       compressor_name %s\n", table->compressor_name);
	printf("       depth %d\n", table->depth);
	printf("       ctab_id %d\n", table->ctab_id);
	printf("       gamma %f\n", table->gamma);
	if(table->fields)
	{
		printf("       fields %d\n", table->fields);
		printf("       field dominance %d\n", table->field_dominance);
	}
	if(!table->ctab_id) quicktime_ctab_dump(&(table->ctab));
	quicktime_mjqt_dump(&(table->mjqt));
	quicktime_mjht_dump(&(table->mjht));
	quicktime_esds_dump(&(table->esds));
}

int quicktime_stsd_hint_dump(quicktime_stsd_table_t *table)
{
	printf("       version %d\n", table->version);
	printf("       revision %d\n", table->revision);
	printf("       maxPktSize %d\n", table->maxPktSize);
	/* TBD dump adtab */
}

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, &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);
	if(minf->is_hint) quicktime_read_stsd_hint(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);
/*printf("quicktime_write_stsd_table %c%c%c%c\n", table->format[0], table->format[1], table->format[2], table->format[3]); */
	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);
	if(minf->is_hint) quicktime_write_stsd_hint(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);

	while (quicktime_position(file) < parent_atom->end) {
		quicktime_atom_t leaf_atom;

		quicktime_atom_read_header(file, &leaf_atom);

		if(quicktime_atom_is(&leaf_atom, "esds")) {
			quicktime_read_esds(file, &(table->esds));
			quicktime_atom_skip(file, &leaf_atom);
		} else {
			quicktime_atom_skip(file, &leaf_atom);
		}
	}
}

int quicktime_write_stsd_audio(quicktime_t *file, quicktime_stsd_table_t *table)
{
	if (file->use_mp4) {
		quicktime_write_int32(file, 0);
		quicktime_write_int32(file, 0);
		quicktime_write_int16(file, 2);
		quicktime_write_int16(file, 16);
		quicktime_write_int32(file, 0);
		quicktime_write_int16(file, table->sample_rate);
		quicktime_write_int16(file, 0);
		quicktime_write_esds_audio(file, &(table->esds),
			file->atracks[0].track->tkhd.track_id);
	} else {
		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, &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_char(file);
			table->field_dominance = quicktime_read_char(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 */
		if(quicktime_atom_is(&leaf_atom, "esds"))
		{
			quicktime_read_esds(file, &(table->esds));
			quicktime_atom_skip(file, &leaf_atom);
		}
		else
		{
			quicktime_atom_skip(file, &leaf_atom);
		}
	}
}

int quicktime_write_stsd_video(quicktime_t *file, quicktime_stsd_table_t *table)
{
	if (file->use_mp4) {
		int i;

		for (i = 0; i < 4; i++) {
			quicktime_write_int32(file, 0);
		}
		quicktime_write_int16(file, table->width);
		quicktime_write_int16(file, table->height);
		quicktime_write_int32(file, 0x00480000);
		quicktime_write_int32(file, 0x00480000);
		quicktime_write_int32(file, 0);
		quicktime_write_int16(file, 1);
		for (i = 0; i < 32; i++) {
			quicktime_write_char(file, 0);
		}
		quicktime_write_int16(file, 24);
		quicktime_write_int16(file, -1);
		quicktime_write_esds_video(file, &(table->esds),
			file->vtracks[0].track->tkhd.track_id);
	} else {
		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);
	}

	if(table->fields)
	{
		quicktime_atom_t atom;

		quicktime_atom_write_header(file, &atom, "fiel");
		quicktime_write_char(file, table->fields);
		quicktime_write_char(file, table->field_dominance);
		quicktime_atom_write_footer(file, &atom);
	}
}

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)
{
}

int quicktime_read_stsd_hint(quicktime_t *file, quicktime_stsd_table_t *table, quicktime_atom_t *parent_atom)
{
	quicktime_atom_t leaf_atom;

	table->version = quicktime_read_int16(file);
	table->revision = quicktime_read_int16(file);
	table->maxPktSize = quicktime_read_int32(file);

	while(quicktime_position(file) < parent_atom->end) {
		quicktime_atom_read_header(file, &leaf_atom);
		
		if(quicktime_atom_is(&leaf_atom, "tims")) {
			quicktime_read_tims(file, &(table->tims));
		}
		quicktime_atom_skip(file, &leaf_atom);
	}
}

int quicktime_write_stsd_hint(quicktime_t *file, quicktime_stsd_table_t *table)
{
	quicktime_write_int16(file, table->version);
	quicktime_write_int16(file, table->revision);
	quicktime_write_int32(file, table->maxPktSize);
	quicktime_write_tims(file, &(table->tims));
}

int quicktime_tims_init(quicktime_tims_t *tims)
{
	tims->timeScale = 0;
}

int quicktime_read_tims(quicktime_t *file, quicktime_tims_t *tims)
{
	tims->timeScale = quicktime_read_int32(file);
}

int quicktime_write_tims(quicktime_t *file, quicktime_tims_t *tims)
{
	quicktime_atom_t atom;

	quicktime_atom_write_header(file, &atom, "tims");
	quicktime_write_int32(file, tims->timeScale);
	quicktime_atom_write_footer(file, &atom);
}