nuclear@0: #include <stdio.h>
nuclear@0: #include <assert.h>
nuclear@0: #include "ovstream.h"
nuclear@0: 
nuclear@0: OggVorbisStream::OggVorbisStream()
nuclear@0: {
nuclear@0: 	vfopen = false;
nuclear@0: 
nuclear@0: 	pthread_mutex_init(&vflock, 0);
nuclear@0: }
nuclear@0: 
nuclear@0: OggVorbisStream::~OggVorbisStream()
nuclear@0: {
nuclear@0: 	close();
nuclear@0: }
nuclear@0: 
nuclear@0: bool OggVorbisStream::open(const char *fname)
nuclear@0: {
nuclear@0: 	close();
nuclear@0: 
nuclear@0: 	pthread_mutex_lock(&vflock);
nuclear@0: 
nuclear@0: 	if(ov_fopen(fname, &vf) != 0) {
nuclear@0: 		fprintf(stderr, "failed to open ogg/vorbis stream: %s\n", fname ? fname : "<not found>");
nuclear@0: 		pthread_mutex_unlock(&vflock);
nuclear@0: 		return false;
nuclear@0: 	}
nuclear@0: 
nuclear@0: 	vfopen = true;
nuclear@0: 	pthread_mutex_unlock(&vflock);
nuclear@0: 	return true;
nuclear@0: }
nuclear@0: 
nuclear@0: void OggVorbisStream::close()
nuclear@0: {
nuclear@0: 	pthread_mutex_lock(&vflock);
nuclear@0: 	if(vfopen) {
nuclear@0: 		ov_clear(&vf);
nuclear@0: 		vfopen = false;
nuclear@0: 	}
nuclear@0: 	pthread_mutex_unlock(&vflock);
nuclear@0: }
nuclear@0: 
nuclear@0: void OggVorbisStream::play(AUDIO_PLAYMODE mode)
nuclear@0: {
nuclear@0: 	if (vfopen)
nuclear@0: 	{
nuclear@0: 		AudioStream::play(mode);
nuclear@0: 	} else {
nuclear@0: 		fprintf(stderr, "failed to play audio track.\n");
nuclear@0: 	}
nuclear@0: }
nuclear@0: 
nuclear@0: void OggVorbisStream::rewind()
nuclear@0: {
nuclear@0: 	pthread_mutex_lock(&vflock);
nuclear@0: 	if(vfopen) {
nuclear@0: 		ov_raw_seek(&vf, 0);
nuclear@0: 	}
nuclear@0: 	pthread_mutex_unlock(&vflock);
nuclear@0: }
nuclear@0: 
nuclear@0: bool OggVorbisStream::more_samples(AudioStreamBuffer *buf)
nuclear@0: {
nuclear@0: 	pthread_mutex_lock(&vflock);
nuclear@0: 
nuclear@0: 	vorbis_info *vinfo = ov_info(&vf, -1);
nuclear@0: 	buf->channels = vinfo->channels;
nuclear@0: 	buf->sample_rate = vinfo->rate;
nuclear@0: 	assert(buf->channels == 2);
nuclear@0: 	assert(buf->sample_rate == 44100);
nuclear@0: 
nuclear@0: 	long bufsz = AUDIO_BUFFER_BYTES;
nuclear@0: 	long total_read = 0;
nuclear@0: 	while(total_read < bufsz) {
nuclear@0: 		int bitstream;
nuclear@0: 		long rd = ov_read(&vf, buf->samples + total_read, bufsz - total_read, 0, 2, 1, &bitstream);
nuclear@0: 
nuclear@0: 		if(!rd) {
nuclear@0: 			bufsz = total_read;
nuclear@0: 		} else {
nuclear@0: 			total_read += rd;
nuclear@0: 		}
nuclear@0: 	}
nuclear@0: 
nuclear@0: 	if(!total_read) {
nuclear@0: 		buf->num_samples = 0;
nuclear@0: 		pthread_mutex_unlock(&vflock);
nuclear@0: 		return false;
nuclear@0: 	}
nuclear@0: 
nuclear@0: 	buf->num_samples = bufsz / vinfo->channels / 2;
nuclear@0: 	pthread_mutex_unlock(&vflock);
nuclear@0: 	return true;
nuclear@0: }