int audio_in_set_channels(audio_in_t *ai, int channels)
{
switch (ai->type) {
#ifdef CONFIG_ALSA
case AUDIO_IN_ALSA:
ai->req_channels = channels;
if (!ai->setup) return 0;
if (ai_alsa_setup(ai) < 0) return -1;
return ai->channels;
#endif
#ifdef CONFIG_OSS_AUDIO
case AUDIO_IN_OSS:
ai->req_channels = channels;
if (!ai->setup) return 0;
if (ai_oss_set_channels(ai) < 0) return -1;
return ai->channels;
#endif
default:
return -1;
}
}
int ai_oss_init(audio_in_t *ai)
{
int err;
int ioctl_param;
ai->oss.audio_fd = open(ai->oss.device, O_RDONLY);
if (ai->oss.audio_fd < 0)
{
mp_msg(MSGT_TV, MSGL_ERR, MSGTR_MPDEMUX_AIOSS_Unable2Open,
ai->oss.device, strerror(errno));
return -1;
}
ioctl_param = 0 ;
mp_msg(MSGT_TV, MSGL_V, "ioctl dsp getfmt: %d\n",
ioctl(ai->oss.audio_fd, SNDCTL_DSP_GETFMTS, &ioctl_param));
mp_msg(MSGT_TV, MSGL_V, "Supported formats: %x\n", ioctl_param);
if (!(ioctl_param & AFMT_S16_LE))
mp_msg(MSGT_TV, MSGL_ERR, MSGTR_MPDEMUX_AIOSS_UnsupportedFmt);
ioctl_param = AFMT_S16_LE;
mp_msg(MSGT_TV, MSGL_V, "ioctl dsp setfmt: %d\n",
err = ioctl(ai->oss.audio_fd, SNDCTL_DSP_SETFMT, &ioctl_param));
if (err < 0) {
mp_msg(MSGT_TV, MSGL_ERR, MSGTR_MPDEMUX_AIOSS_Unable2SetAudioFmt);
return -1;
}
if (ai_oss_set_channels(ai) < 0) return -1;
ioctl_param = ai->req_samplerate;
mp_msg(MSGT_TV, MSGL_V, "ioctl dsp speed: %d\n",
err = ioctl(ai->oss.audio_fd, SNDCTL_DSP_SPEED, &ioctl_param));
if (err < 0) {
mp_msg(MSGT_TV, MSGL_ERR, MSGTR_MPDEMUX_AIOSS_Unable2SetSamplerate,
ai->req_samplerate);
return -1;
}
ai->samplerate = ioctl_param;
mp_msg(MSGT_TV, MSGL_V, "ioctl dsp trigger: %d\n",
ioctl(ai->oss.audio_fd, SNDCTL_DSP_GETTRIGGER, &ioctl_param));
mp_msg(MSGT_TV, MSGL_V, "trigger: %x\n", ioctl_param);
ioctl_param = PCM_ENABLE_INPUT;
mp_msg(MSGT_TV, MSGL_V, "ioctl dsp trigger: %d\n",
err = ioctl(ai->oss.audio_fd, SNDCTL_DSP_SETTRIGGER, &ioctl_param));
if (err < 0) {
mp_msg(MSGT_TV, MSGL_ERR, MSGTR_MPDEMUX_AIOSS_Unable2SetTrigger,
PCM_ENABLE_INPUT);
}
ai->blocksize = 0;
mp_msg(MSGT_TV, MSGL_V, "ioctl dsp getblocksize: %d\n",
err = ioctl(ai->oss.audio_fd, SNDCTL_DSP_GETBLKSIZE, &ai->blocksize));
if (err < 0) {
mp_msg(MSGT_TV, MSGL_ERR, MSGTR_MPDEMUX_AIOSS_Unable2GetBlockSize);
}
mp_msg(MSGT_TV, MSGL_V, "blocksize: %d\n", ai->blocksize);
// correct the blocksize to a reasonable value
if (ai->blocksize <= 0) {
ai->blocksize = 4096*ai->channels*2;
mp_msg(MSGT_TV, MSGL_ERR, MSGTR_MPDEMUX_AIOSS_AudioBlockSizeZero, ai->blocksize);
} else if (ai->blocksize < 4096*ai->channels*2) {
ai->blocksize *= 4096*ai->channels*2/ai->blocksize;
mp_msg(MSGT_TV, MSGL_ERR, MSGTR_MPDEMUX_AIOSS_AudioBlockSize2Low, ai->blocksize);
}
ai->samplesize = 16;
ai->bytes_per_sample = 2;
return 0;
}
int ai_oss_init(audio_in_t *ai)
{
int err;
int ioctl_param;
ai->oss.audio_fd = open(ai->oss.device, O_RDONLY);
if (ai->oss.audio_fd < 0)
{
mp_tmsg(MSGT_TV, MSGL_ERR, "Unable to open '%s': %s\n",
ai->oss.device, strerror(errno));
return -1;
}
ioctl_param = 0 ;
mp_msg(MSGT_TV, MSGL_V, "ioctl dsp getfmt: %d\n",
ioctl(ai->oss.audio_fd, SNDCTL_DSP_GETFMTS, &ioctl_param));
mp_msg(MSGT_TV, MSGL_V, "Supported formats: %x\n", ioctl_param);
if (!(ioctl_param & AFMT_S16_LE))
mp_tmsg(MSGT_TV, MSGL_ERR, "unsupported format\n");
ioctl_param = AFMT_S16_LE;
mp_msg(MSGT_TV, MSGL_V, "ioctl dsp setfmt: %d\n",
err = ioctl(ai->oss.audio_fd, SNDCTL_DSP_SETFMT, &ioctl_param));
if (err < 0) {
mp_tmsg(MSGT_TV, MSGL_ERR, "Unable to set audio format.");
return -1;
}
if (ai_oss_set_channels(ai) < 0) return -1;
ioctl_param = ai->req_samplerate;
mp_msg(MSGT_TV, MSGL_V, "ioctl dsp speed: %d\n",
err = ioctl(ai->oss.audio_fd, SNDCTL_DSP_SPEED, &ioctl_param));
if (err < 0) {
mp_tmsg(MSGT_TV, MSGL_ERR, "Unable to set samplerate: %d\n",
ai->req_samplerate);
return -1;
}
ai->samplerate = ioctl_param;
mp_msg(MSGT_TV, MSGL_V, "ioctl dsp trigger: %d\n",
ioctl(ai->oss.audio_fd, SNDCTL_DSP_GETTRIGGER, &ioctl_param));
mp_msg(MSGT_TV, MSGL_V, "trigger: %x\n", ioctl_param);
ioctl_param = PCM_ENABLE_INPUT;
mp_msg(MSGT_TV, MSGL_V, "ioctl dsp trigger: %d\n",
err = ioctl(ai->oss.audio_fd, SNDCTL_DSP_SETTRIGGER, &ioctl_param));
if (err < 0) {
mp_tmsg(MSGT_TV, MSGL_ERR, "Unable to set trigger: %d\n",
PCM_ENABLE_INPUT);
}
ai->blocksize = 0;
mp_msg(MSGT_TV, MSGL_V, "ioctl dsp getblocksize: %d\n",
err = ioctl(ai->oss.audio_fd, SNDCTL_DSP_GETBLKSIZE, &ai->blocksize));
if (err < 0) {
mp_tmsg(MSGT_TV, MSGL_ERR, "Unable to get block size!\n");
}
mp_msg(MSGT_TV, MSGL_V, "blocksize: %d\n", ai->blocksize);
// correct the blocksize to a reasonable value
if (ai->blocksize <= 0) {
ai->blocksize = 4096*ai->channels*2;
mp_tmsg(MSGT_TV, MSGL_ERR, "Audio block size is zero, setting to %d!\n", ai->blocksize);
} else if (ai->blocksize < 4096*ai->channels*2) {
ai->blocksize *= 4096*ai->channels*2/ai->blocksize;
mp_tmsg(MSGT_TV, MSGL_ERR, "Audio block size too low, setting to %d!\n", ai->blocksize);
}
ai->samplesize = 16;
ai->bytes_per_sample = 2;
return 0;
}
