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mdia.c：源码内容

							#include "quicktime.h"
int quicktime_mdia_init(quicktime_mdia_t *mdia)
{
	quicktime_mdhd_init(&(mdia->mdhd));
	quicktime_hdlr_init(&(mdia->hdlr));
	quicktime_minf_init(&(mdia->minf));
}
int quicktime_mdia_init_video(quicktime_t *file, 
								quicktime_mdia_t *mdia,
								int frame_w,
								int frame_h, 
								float frame_rate,
								char *compressor)
{
	quicktime_mdhd_init_video(file, &(mdia->mdhd), frame_w, frame_h, frame_rate);
	quicktime_minf_init_video(file, &(mdia->minf), frame_w, frame_h, frame_rate, compressor);
	quicktime_hdlr_init_video(&(mdia->hdlr));
}
int quicktime_mdia_init_audio(quicktime_t *file, 
							quicktime_mdia_t *mdia, 
							int channels,
							int sample_rate, 
							int bits, 
							char *compressor)
{
	quicktime_mdhd_init_audio(file, &(mdia->mdhd), channels, sample_rate, bits, compressor);
	quicktime_minf_init_audio(file, &(mdia->minf), channels, sample_rate, bits, compressor);
	quicktime_hdlr_init_audio(&(mdia->hdlr));
}
int quicktime_mdia_delete(quicktime_mdia_t *mdia)
{
	quicktime_mdhd_delete(&(mdia->mdhd));
	quicktime_hdlr_delete(&(mdia->hdlr));
	quicktime_minf_delete(&(mdia->minf));
}
int quicktime_mdia_dump(quicktime_mdia_t *mdia)
{
	printf("  median");
	quicktime_mdhd_dump(&(mdia->mdhd));
	quicktime_hdlr_dump(&(mdia->hdlr));
	quicktime_minf_dump(&(mdia->minf));
}
int quicktime_read_mdia(quicktime_t *file, quicktime_mdia_t *mdia, quicktime_atom_t *trak_atom)
{
	quicktime_atom_t leaf_atom;
	do
	{
		quicktime_atom_read_header(file->stream, &leaf_atom);
// mandatory
		if(quicktime_atom_is(&leaf_atom, "mdhd"))
			{ quicktime_read_mdhd(file, &(mdia->mdhd)); }
		else
		if(quicktime_atom_is(&leaf_atom, "hdlr"))
			{ quicktime_read_hdlr(file, &(mdia->hdlr)); }
		else
		if(quicktime_atom_is(&leaf_atom, "minf"))
			{ quicktime_read_minf(file, &(mdia->minf), &leaf_atom); }
		else
			quicktime_atom_skip(file, &leaf_atom);
	}while(quicktime_position(file) < trak_atom->end);
	return 0;
}
int quicktime_write_mdia(quicktime_t *file, quicktime_mdia_t *mdia)
{
	quicktime_atom_t atom;
	quicktime_atom_write_header(file, &atom, "mdia");
	quicktime_write_mdhd(file, &(mdia->mdhd));
	quicktime_write_hdlr(file, &(mdia->hdlr));
	quicktime_write_minf(file, &(mdia->minf));
	quicktime_atom_write_footer(file, &atom);
}

						