void sys_close_audio(void)
{
if (sys_externalschedlib)
{
return;
}
if (!audio_isopen())
return;
#ifdef USEAPI_PORTAUDIO
if (sys_audioapiopened == API_PORTAUDIO)
pa_close_audio();
else
#endif
#ifdef USEAPI_JACK
if (sys_audioapiopened == API_JACK)
jack_close_audio();
else
#endif
#ifdef USEAPI_OSS
if (sys_audioapiopened == API_OSS)
oss_close_audio();
else
#endif
#ifdef USEAPI_ALSA
if (sys_audioapiopened == API_ALSA)
alsa_close_audio();
else
#endif
#ifdef USEAPI_MMIO
if (sys_audioapiopened == API_MMIO)
mmio_close_audio();
else
#endif
#ifdef USEAPI_AUDIOUNIT
if (sys_audioapiopened == API_AUDIOUNIT)
audiounit_close_audio();
else
#endif
#ifdef USEAPI_ESD
if (sys_audioapiopened == API_ESD)
esd_close_audio();
else
#endif
#ifdef USEAPI_DUMMY
if (sys_audioapiopened == API_DUMMY)
dummy_close_audio();
else
#endif
post("sys_close_audio: unknown API %d", sys_audioapiopened);
sys_inchannels = sys_outchannels = 0;
sys_audioapiopened = -1;
sched_set_using_audio(SCHED_AUDIO_NONE);
audio_state = 0;
audio_callback_is_open = 0;
sys_vgui("set pd_whichapi 0\n");
}
void sys_close_audio(void)
{
if (!audio_isopen())
return;
#ifdef USEAPI_PORTAUDIO
if (sys_audioapi == API_PORTAUDIO)
pa_close_audio();
else
#endif
#ifdef USEAPI_JACK
if (sys_audioapi == API_JACK)
jack_close_audio();
else
#endif
#ifdef USEAPI_OSS
if (sys_audioapi == API_OSS)
oss_close_audio();
else
#endif
#ifdef USEAPI_ALSA
if (sys_audioapi == API_ALSA)
alsa_close_audio();
else
#endif
#ifdef USEAPI_MMIO
if (sys_audioapi == API_MMIO)
mmio_close_audio();
else
#endif
#ifdef USEAPI_ROCKBOX
if (sys_audioapi == API_ROCKBOX)
rockbox_close_audio();
else
#endif
post("sys_close_audio: unknown API %d", sys_audioapi);
sys_inchannels = sys_outchannels = 0;
}
/* return 0 on success */
int alsa_open_audio(int naudioindev, int *audioindev, int nchindev,
int *chindev, int naudiooutdev, int *audiooutdev, int nchoutdev,
int *choutdev, int rate)
{
int err, inchans = 0, outchans = 0, subunitdir;
char devname[512];
snd_output_t* out;
int frag_size = (sys_blocksize ? sys_blocksize : ALSA_DEFFRAGSIZE);
int nfrags, i, iodev, dev2;
int wantinchans, wantoutchans, device;
nfrags = sys_schedadvance * (float)rate / (1e6 * frag_size);
/* save our belief as to ALSA's buffer size for later */
alsa_buf_samps = nfrags * frag_size;
alsa_nindev = alsa_noutdev = 0;
alsa_jittermax = ALSA_DEFJITTERMAX;
if (sys_verbose)
post("audio buffer set to %d", (int)(0.001 * sys_schedadvance));
for (iodev = 0; iodev < naudioindev; iodev++)
{
alsa_numbertoname(audioindev[iodev], devname, 512);
err = snd_pcm_open(&alsa_indev[alsa_nindev].a_handle, devname,
SND_PCM_STREAM_CAPTURE, SND_PCM_NONBLOCK);
check_error(err, "snd_pcm_open (input)");
if (err < 0)
continue;
alsa_indev[alsa_nindev].a_devno = audioindev[iodev];
snd_pcm_nonblock(alsa_indev[alsa_nindev].a_handle, 1);
if (sys_verbose)
post("opened input device name %s", devname);
alsa_nindev++;
}
for (iodev = 0; iodev < naudiooutdev; iodev++)
{
alsa_numbertoname(audiooutdev[iodev], devname, 512);
err = snd_pcm_open(&alsa_outdev[alsa_noutdev].a_handle, devname,
SND_PCM_STREAM_PLAYBACK, SND_PCM_NONBLOCK);
check_error(err, "snd_pcm_open (output)");
if (err < 0)
continue;
alsa_outdev[alsa_noutdev].a_devno = audiooutdev[iodev];
snd_pcm_nonblock(alsa_outdev[alsa_noutdev].a_handle, 1);
alsa_noutdev++;
}
if (!alsa_nindev && !alsa_noutdev)
goto blewit;
/* If all the open devices support mmap_noninterleaved, let's call
Wini's code in s_audio_alsamm.c */
alsa_usemmap = 1;
for (iodev = 0; iodev < alsa_nindev; iodev++)
if (!alsaio_canmmap(&alsa_indev[iodev]))
alsa_usemmap = 0;
for (iodev = 0; iodev < alsa_noutdev; iodev++)
if (!alsaio_canmmap(&alsa_outdev[iodev]))
alsa_usemmap = 0;
if (alsa_usemmap)
{
post("using mmap audio interface");
if (alsamm_open_audio(rate))
goto blewit;
else return (0);
}
for (iodev = 0; iodev < alsa_nindev; iodev++)
{
int channels = chindev[iodev];
if (alsaio_setup(&alsa_indev[iodev], 0, &channels, &rate,
nfrags, frag_size) < 0)
goto blewit;
inchans += channels;
}
for (iodev = 0; iodev < alsa_noutdev; iodev++)
{
int channels = choutdev[iodev];
if (alsaio_setup(&alsa_outdev[iodev], 1, &channels, &rate,
nfrags, frag_size) < 0)
goto blewit;
outchans += channels;
}
if (!inchans && !outchans)
goto blewit;
for (iodev = 0; iodev < alsa_nindev; iodev++)
snd_pcm_prepare(alsa_indev[iodev].a_handle);
for (iodev = 0; iodev < alsa_noutdev; iodev++)
snd_pcm_prepare(alsa_outdev[iodev].a_handle);
/* if duplex we can link the channels so they start together */
for (iodev = 0; iodev < alsa_nindev; iodev++)
for (dev2 = 0; dev2 < alsa_noutdev; dev2++)
{
if (alsa_indev[iodev].a_devno == alsa_outdev[iodev].a_devno)
{
snd_pcm_link(alsa_indev[iodev].a_handle,
alsa_outdev[iodev].a_handle);
}
}
/* allocate the status variables */
if (!alsa_status)
{
err = snd_pcm_status_malloc(&alsa_status);
check_error(err, "snd_pcm_status_malloc");
}
/* fill the buffer with silence */
memset(alsa_snd_buf, 0, alsa_snd_bufsize);
if (outchans)
{
i = (frag_size * nfrags)/DEFDACBLKSIZE + 1;
while (i--)
{
for (iodev = 0; iodev < alsa_noutdev; iodev++)
snd_pcm_writei(alsa_outdev[iodev].a_handle, alsa_snd_buf,
DEFDACBLKSIZE);
}
}
else if (inchans)
{
for (iodev = 0; iodev < alsa_nindev; iodev++)
if ((err = snd_pcm_start(alsa_indev[iodev].a_handle)) < 0)
check_error(err, "input start failed\n");
}
return (0);
blewit:
sys_inchannels = 0;
sys_outchannels = 0;
alsa_close_audio();
return (1);
}