/*****************************************************************
* \brief read next part of data into buffer
* \return -1 if error occured or no data available yet, otherwise - bytes read
* NOTE: audio device works in non-blocking mode
*/
static int read_chunk(audio_in_t *ai, unsigned char *buffer)
{
int ret;
switch (ai->type) {
#ifdef CONFIG_ALSA
case AUDIO_IN_ALSA:
//device opened in non-blocking mode
ret = snd_pcm_readi(ai->alsa.handle, buffer, ai->alsa.chunk_size);
if (ret != ai->alsa.chunk_size) {
if (ret < 0) {
if (ret==-EAGAIN) return -1;
mp_tmsg(MSGT_RADIO, MSGL_ERR, "\nError reading audio: %s\n", snd_strerror(ret));
if (ret == -EPIPE) {
if (ai_alsa_xrun(ai) == 0) {
mp_tmsg(MSGT_RADIO, MSGL_ERR, "Recovered from cross-run, some frames may be left out!\n");
} else {
mp_tmsg(MSGT_RADIO, MSGL_ERR, "Fatal error, cannot recover!\n");
}
}
} else {
mp_tmsg(MSGT_RADIO, MSGL_ERR, "\nNot enough audio samples!\n");
}
return -1;
}
return ret;
#endif
#ifdef CONFIG_OSS_AUDIO
case AUDIO_IN_OSS:
{
int bt=0;
/*
we must return exactly blocksize bytes, so if we have got any bytes
at first call to read, we will loop untils get all blocksize bytes
otherwise we will return -1
*/
while(bt<ai->blocksize) {
//device opened in non-blocking mode
ret = read(ai->oss.audio_fd, buffer+bt, ai->blocksize-bt);
if (ret==ai->blocksize) return ret;
if (ret<0) {
if (errno==EAGAIN && bt==0) return -1; //no data avail yet
if (errno==EAGAIN) {
usleep(1000); //nilling buffer to blocksize size
continue;
}
mp_tmsg(MSGT_RADIO, MSGL_ERR, "\nError reading audio: %s\n", strerror(errno));
return -1;
}
bt+=ret;
}
return bt;
}
#endif
default:
return -1;
}
}
/*****************************************************************
* \brief read next part of data into buffer
* \return -1 if error occured or no data available yet, otherwise - bytes read
* NOTE: audio device works in non-blocking mode
*/
static int read_chunk(audio_in_t *ai, unsigned char *buffer)
{
int ret;
switch (ai->type) {
#if defined(HAVE_ALSA9) || defined(HAVE_ALSA1X)
case AUDIO_IN_ALSA:
//device opened in non-blocking mode
ret = snd_pcm_readi(ai->alsa.handle, buffer, ai->alsa.chunk_size);
if (ret != ai->alsa.chunk_size) {
if (ret < 0) {
if (ret==-EAGAIN) return -1;
mp_msg(MSGT_RADIO, MSGL_ERR, MSGTR_MPDEMUX_AUDIOIN_ErrReadingAudio, snd_strerror(ret));
if (ret == -EPIPE) {
if (ai_alsa_xrun(ai) == 0) {
mp_msg(MSGT_RADIO, MSGL_ERR, MSGTR_MPDEMUX_AUDIOIN_XRUNSomeFramesMayBeLeftOut);
} else {
mp_msg(MSGT_RADIO, MSGL_ERR, MSGTR_MPDEMUX_AUDIOIN_ErrFatalCannotRecover);
}
}
} else {
mp_msg(MSGT_RADIO, MSGL_ERR, MSGTR_MPDEMUX_AUDIOIN_NotEnoughSamples);
}
return -1;
}
return ret;
#endif
#ifdef USE_OSS_AUDIO
case AUDIO_IN_OSS:
{
int bt=0;
/*
we must return exactly blocksize bytes, so if we have got any bytes
at first call to read, we will loop untils get all blocksize bytes
otherwise we will return -1
*/
while(bt<ai->blocksize){
//device opened in non-blocking mode
ret = read(ai->oss.audio_fd, buffer+bt, ai->blocksize-bt);
if (ret==ai->blocksize) return ret;
if (ret<0){
if (errno==EAGAIN && bt==0) return -1; //no data avail yet
if (errno==EAGAIN) { usleep(1000); continue;} //nilling buffer to blocksize size
mp_msg(MSGT_RADIO, MSGL_ERR, MSGTR_MPDEMUX_AUDIOIN_ErrReadingAudio, strerror(errno));
return -1;
}
bt+=ret;
}
return bt;
}
#endif
default:
return -1;
}
}
int audio_in_read_chunk(audio_in_t *ai, unsigned char *buffer)
{
int ret;
switch (ai->type) {
#ifdef CONFIG_ALSA
case AUDIO_IN_ALSA:
ret = snd_pcm_readi(ai->alsa.handle, buffer, ai->alsa.chunk_size);
if (ret != ai->alsa.chunk_size) {
if (ret < 0) {
mp_tmsg(MSGT_TV, MSGL_ERR, "\nError reading audio: %s\n", snd_strerror(ret));
if (ret == -EPIPE) {
if (ai_alsa_xrun(ai) == 0) {
mp_tmsg(MSGT_TV, MSGL_ERR, "Recovered from cross-run, some frames may be left out!\n");
} else {
mp_tmsg(MSGT_TV, MSGL_ERR, "Fatal error, cannot recover!\n");
}
}
} else {
mp_tmsg(MSGT_TV, MSGL_ERR, "\nNot enough audio samples!\n");
}
return -1;
}
return ret;
#endif
#ifdef CONFIG_OSS_AUDIO
case AUDIO_IN_OSS:
ret = read(ai->oss.audio_fd, buffer, ai->blocksize);
if (ret != ai->blocksize) {
if (ret < 0) {
mp_tmsg(MSGT_TV, MSGL_ERR, "\nError reading audio: %s\n", strerror(errno));
} else {
mp_tmsg(MSGT_TV, MSGL_ERR, "\nNot enough audio samples!\n");
}
return -1;
}
return ret;
#endif
default:
return -1;
}
}
int audio_in_read_chunk(audio_in_t *ai, unsigned char *buffer)
{
int ret;
switch (ai->type) {
#ifdef CONFIG_ALSA
case AUDIO_IN_ALSA:
ret = snd_pcm_readi(ai->alsa.handle, buffer, ai->alsa.chunk_size);
if (ret != ai->alsa.chunk_size) {
if (ret < 0) {
mp_msg(MSGT_TV, MSGL_ERR, MSGTR_MPDEMUX_AUDIOIN_ErrReadingAudio, snd_strerror(ret));
if (ret == -EPIPE) {
if (ai_alsa_xrun(ai) == 0) {
mp_msg(MSGT_TV, MSGL_ERR, MSGTR_MPDEMUX_AUDIOIN_XRUNSomeFramesMayBeLeftOut);
} else {
mp_msg(MSGT_TV, MSGL_ERR, MSGTR_MPDEMUX_AUDIOIN_ErrFatalCannotRecover);
}
}
} else {
mp_msg(MSGT_TV, MSGL_ERR, MSGTR_MPDEMUX_AUDIOIN_NotEnoughSamples);
}
return -1;
}
return ret;
#endif
#ifdef CONFIG_OSS_AUDIO
case AUDIO_IN_OSS:
ret = read(ai->oss.audio_fd, buffer, ai->blocksize);
if (ret != ai->blocksize) {
if (ret < 0) {
mp_msg(MSGT_TV, MSGL_ERR, MSGTR_MPDEMUX_AUDIOIN_ErrReadingAudio, strerror(errno));
} else {
mp_msg(MSGT_TV, MSGL_ERR, MSGTR_MPDEMUX_AUDIOIN_NotEnoughSamples);
}
return -1;
}
return ret;
#endif
default:
return -1;
}
}
