raopcl_t *raopcl_open()
{
raopcl_data_t *raopcld;
int16_t sdata[MINIMUM_SAMPLE_SIZE*2];
data_source_t ds={.type=MEMORY};
u_int8_t *bp;
raopcld=malloc(sizeof(raopcl_data_t));
RAND_seed(raopcld,sizeof(raopcl_data_t));
memset(raopcld, 0, sizeof(raopcl_data_t));
if(!RAND_bytes(raopcld->iv, sizeof(raopcld->iv)) || !RAND_bytes(raopcld->key, sizeof(raopcld->key))){
ERRMSG("%s:RAND_bytes error code=%ld\n",__func__,ERR_get_error());
return NULL;
}
memcpy(raopcld->nv,raopcld->iv,sizeof(raopcld->nv));
raopcld->volume=VOLUME_DEF;
aes_set_key(&raopcld->ctx, raopcld->key, 128);
// prepare a small silent data to send during pause period.
ds.u.mem.size=MINIMUM_SAMPLE_SIZE*4;
ds.u.mem.data=sdata;
memset(sdata,0,sizeof(sdata));
auds_write_pcm(NULL, raopcld->min_sdata, &bp, &raopcld->min_sdata_size,
MINIMUM_SAMPLE_SIZE, &ds);
return (raopcl_t *)raopcld;
}
int pcm_get_next_sample(auds_t *auds, __u8 **data, int *size)
{
int rval;
pcm_t *pcm=(pcm_t *)auds->stream;
int bsize=auds->chunk_size;
data_source_t ds={.type=MEMORY};
__u8 *rbuf=NULL;
if(!(rbuf=(__u8*)malloc(bsize*4))) return -1;
memset(rbuf,0,bsize*4);
/* ds.u.mem.size, ds.u.mem.data */
ds.u.mem.size=read(pcm->dfd,rbuf,bsize*4);
if(ds.u.mem.size<0){
ERRMSG("%s: data read error(%s)\n", __func__, strerror(errno));
return -1;
}
if(ds.u.mem.size<MINIMUM_SAMPLE_SIZE*4){
//INFMSG("%s: too small chunk of data(size=%d), add null data\n",__func__, ds.u.mem.size);
ds.u.mem.size=MINIMUM_SAMPLE_SIZE*4;
}
ds.u.mem.data=(__s16*)rbuf;
bsize=ds.u.mem.size/4;
rval=auds_write_pcm(auds, pcm->buffer, data, size, bsize, &ds);
free(rbuf);
return rval;
}
int wav_get_next_sample(auds_t *auds, __u8 **data, int *size)
{
wav_t *wav=(wav_t *)auds->stream;
int bsize=(wav->subchunk2size - wav->playedbytes>=auds->chunk_size)?
auds->chunk_size:wav->subchunk2size - wav->playedbytes;
data_source_t ds={.type=STREAM, .u.inf=wav->inf};
if(!bsize) return -1;
wav->playedbytes+=bsize;
return auds_write_pcm(auds, wav->buffer, data, size, bsize, &ds);
}
static int read_wave_header(wav_t *wav, int *sample_rate, int *channels)
{
wave_header_t head;
FILE *infile=wav->inf;
if(fread(&head,1,sizeof(head),infile)<sizeof(head)) return -1;
if(strncmp(head.charChunkID,"RIFF",4) || strncmp(head.Format,"WAVE",4)){
ERRMSG("This is not a WAV file\n");
return -1;
}
*channels=head.NumChannels;
if(head.NumChannels!=2 && head.NumChannels!=1){
ERRMSG("This is neither stereo nor mono, NumChannels=%d\n",head.NumChannels);
return -1;
}
if(head.BitsPerSample!=16){
ERRMSG("bits per sample = %d, we need 16 bits data\n", head.BitsPerSample);
return -1;
}
*sample_rate=head.SampleRate;
#if 0
if(head.SampleRate!=DEFAULT_SAMPLE_RATE){
ERRMSG("sample rate = %d, we need %d\n", head.SampleRate,DEFAULT_SAMPLE_RATE);
return -1;
}
#endif
if(strncmp(head.Subchunk2ID,"data",4)){
ERRMSG("sub chunk is not \"data\"\n");
//return -1;
}
wav->subchunk2size=head.Subchunk2Size;
return 0;
}
int wav_get_next_sample(auds_t *auds, uint8_t **data, int *size)
{
wav_t *wav=(wav_t *)auds->stream;
int bsize=MAX_SAMPLES_IN_CHUNK;
data_source_t ds={.type=STREAM, .inf=wav->inf, .inf2=wav->inf2 };
if(!bsize) return -1;
wav->playedbytes+=bsize;
int posinbytes;
if (csync>0.0)
{
posinbytes=ftell(wav->inf2);
}
else
{
posinbytes=ftell(wav->inf);
}
if ( posinbytes < 0 )
{
ERRMSG( "Couldn't get file position\n" );
}
else
{
// in secs
fposition=(posinbytes-sizeof(wave_header_t))/(sizeof(short)*auds->channels*auds->sample_rate);
}
long enbbytes = sizeof(short)*auds->channels*auds->sample_rate;
if ( endinms != -1 )
{
enbbytes *= endinms/1000;
if ( posinbytes >= enbbytes )
{
DBGMSG( "marker end position reached\n" );
return -1;
}
}
return auds_write_pcm(auds, wav->buffer, data, size, bsize, &ds);
}
static int read_wave_header(wav_t *wav, int *sample_rate, int *channels)
{
wave_header_t head;
FILE *infile=wav->inf;
if(fread(&head,1,sizeof(head),infile)<sizeof(head)) return -1;
if(strncmp(head.charChunkID,"RIFF",4) || strncmp(head.Format,"WAVE",4)){
ERRMSG("This is not a WAV file\n");
return -1;
}
*channels=head.NumChannels;
if(head.NumChannels!=2 && head.NumChannels!=1){
ERRMSG("This is neither stereo nor mono, NumChannels=%d\n",head.NumChannels);
return -1;
}
if(head.BitsPerSample!=16){
ERRMSG("bits per sample = %d, we need 16 bits data\n", head.BitsPerSample);
return -1;
}
*sample_rate=head.SampleRate;
#if 0
if(head.SampleRate!=DEFAULT_SAMPLE_RATE){
ERRMSG("sample rate = %d, we need %d\n", head.SampleRate,DEFAULT_SAMPLE_RATE);
return -1;
}
#endif
// if(strncmp(head.Subchunk2ID,"data",4)){
// ERRMSG("sub chunk is not \"data\"\n");
// return -1;
// }
wav->subchunk2size=head.Subchunk2Size;
return 0;
}
int aac_get_next_sample(auds_t *auds, u_int8_t **data, int *size)
{
aac_t *aac=(aac_t *)auds->stream;
data_source_t ds={.type=STREAM, .u.inf=aac->inf};
return auds_write_pcm(auds, aac->buffer, data, size, auds->chunk_size, &ds);
}