static int audio_open(audiodevice_t *dev, chanfmt_t fmt) {
audio_alsa05_t *alsa = (audio_alsa05_t *)dev->data_pcm;
snd_pcm_channel_params_t p;
snd_pcm_channel_setup_t s;
if (0 > snd_pcm_open(&alsa->pcm_handle, alsa->card, alsa->pcm_dev, SND_PCM_OPEN_PLAYBACK)) {
WARNING("Opening audio device %d failed\n", alsa->pcm_dev);
goto _err_exit;
}
memset(&alsa->info, 0, sizeof(snd_pcm_channel_info_t));
if (0 > snd_pcm_channel_info(alsa->pcm_handle, &alsa->info)) {
WARNING("param get failed\n");
goto _err_exit;
}
memset(&p, 0, sizeof(p));
p.mode = SND_PCM_MODE_BLOCK;
p.start_mode = SND_PCM_START_DATA;
p.channel = SND_PCM_CHANNEL_PLAYBACK;
p.stop_mode = SND_PCM_STOP_STOP;
p.buf.block.frag_size = 1536;
p.buf.block.frags_max = 6;
p.buf.block.frags_min = 1;
p.format.rate = fmt.rate;
p.format.format = fmt.bit == 8 ? SND_PCM_SFMT_U8 : SND_PCM_SFMT_S16;
p.format.voices = fmt.ch;
p.format.interleave = 1;
alsa->silence = fmt.bit == 8 ? 0x80 : 0;
if (0 > snd_pcm_channel_params(alsa->pcm_handle, &p)) {
WARNING("Unable to set channel params\n");
goto _err_exit;
}
if (0 > snd_pcm_channel_prepare(alsa->pcm_handle, SND_PCM_CHANNEL_PLAYBACK)) {
WARNING("Unable to prepare channel\n");
goto _err_exit;
}
memset(&s, 0, sizeof(s));
s.mode = SND_PCM_MODE_BLOCK;
s.channel = SND_PCM_CHANNEL_PLAYBACK;
if (0 > snd_pcm_channel_setup(alsa->pcm_handle, &s)) {
WARNING("Unable to obtain setup\n");
goto _err_exit;
}
dev->buf.len = s.buf.block.frag_size;
dev->fd = snd_pcm_file_descriptor(alsa->pcm_handle, SND_PCM_CHANNEL_PLAYBACK);
return OK;
_err_exit:
dev->fd = -1;
return NG;
}
static int
reconfigurePcmChannel (PcmDevice *pcm, int errorLevel) {
int code;
if ((code = snd_pcm_channel_params(pcm->handle, &pcm->parameters)) >= 0) {
snd_pcm_channel_setup_t setup;
setup.channel = pcm->parameters.channel;
if ((code = snd_pcm_channel_setup(pcm->handle, &setup)) >= 0) {
pcm->parameters.mode = setup.mode;
pcm->parameters.format = setup.format;
pcm->parameters.buf.block.frag_size = setup.buf.block.frag_size;
pcm->parameters.buf.block.frags_min = setup.buf.block.frags_min;
pcm->parameters.buf.block.frags_max = setup.buf.block.frags_max;
return 1;
} else {
logPcmError(errorLevel, "get channel setup", code);
}
} else {
logPcmError(errorLevel, "set channel parameters", code);
}
return 0;
}
static void *alsa_qsa_init(const char *device,
unsigned rate, unsigned latency, unsigned block_frames,
unsigned *new_rate)
{
int err, card, dev, i;
snd_pcm_channel_info_t pi;
snd_pcm_channel_params_t params = {0};
snd_pcm_channel_setup_t setup = {0};
alsa_t *alsa = (alsa_t*)calloc(1, sizeof(alsa_t));
if (!alsa)
return NULL;
(void)device;
(void)rate;
(void)latency;
if ((err = snd_pcm_open_preferred(&alsa->pcm, &card, &dev,
SND_PCM_OPEN_PLAYBACK)) < 0)
{
RARCH_ERR("[ALSA QSA]: Audio open error: %s\n",
snd_strerror(err));
goto error;
}
if((err = snd_pcm_nonblock_mode(alsa->pcm, 1)) < 0)
{
RARCH_ERR("[ALSA QSA]: Can't set blocking mode: %s\n",
snd_strerror(err));
goto error;
}
memset(&pi, 0, sizeof(pi));
pi.channel = SND_PCM_CHANNEL_PLAYBACK;
if ((err = snd_pcm_channel_info(alsa->pcm, &pi)) < 0)
{
RARCH_ERR("[ALSA QSA]: snd_pcm_channel_info failed: %s\n",
snd_strerror(err));
goto error;
}
memset(¶ms, 0, sizeof(params));
params.channel = SND_PCM_CHANNEL_PLAYBACK;
params.mode = SND_PCM_MODE_BLOCK;
params.format.interleave = 1;
params.format.format = SND_PCM_SFMT_S16_LE;
params.format.rate = DEFAULT_RATE;
params.format.voices = 2;
params.start_mode = SND_PCM_START_FULL;
params.stop_mode = SND_PCM_STOP_STOP;
params.buf.block.frag_size = pi.max_fragment_size;
params.buf.block.frags_min = 2;
params.buf.block.frags_max = 8;
RARCH_LOG("Fragment size: %d\n", params.buf.block.frag_size);
RARCH_LOG("Min Fragment size: %d\n", params.buf.block.frags_min);
RARCH_LOG("Max Fragment size: %d\n", params.buf.block.frags_max);
if ((err = snd_pcm_channel_params(alsa->pcm, ¶ms)) < 0)
{
RARCH_ERR("[ALSA QSA]: Channel Parameter Error: %s\n",
snd_strerror(err));
goto error;
}
setup.channel = SND_PCM_CHANNEL_PLAYBACK;
if ((err = snd_pcm_channel_setup(alsa->pcm, &setup)) < 0)
{
RARCH_ERR("[ALSA QSA]: Channel Parameter Read Back Error: %s\n",
snd_strerror(err));
goto error;
}
if (block_frames)
alsa->buf_size = block_frames * 4;
else
alsa->buf_size = next_pow2(32 * latency);
RARCH_LOG("[ALSA QSA]: buffer size: %u bytes\n", alsa->buf_size);
alsa->buf_count = (latency * 4 * rate + 500) / 1000;
alsa->buf_count = (alsa->buf_count + alsa->buf_size / 2) / alsa->buf_size;
if ((err = snd_pcm_channel_prepare(alsa->pcm,
SND_PCM_CHANNEL_PLAYBACK)) < 0)
{
RARCH_ERR("[ALSA QSA]: Channel Prepare Error: %s\n",
snd_strerror(err));
goto error;
}
alsa->buffer = (uint8_t**)calloc(sizeof(uint8_t*), alsa->buf_count);
if (!alsa->buffer)
goto error;
alsa->buffer_chunk = (uint8_t*)calloc(alsa->buf_count, alsa->buf_size);
if (!alsa->buffer_chunk)
goto error;
for (i = 0; i < alsa->buf_count; i++)
alsa->buffer[i] = alsa->buffer_chunk + i * alsa->buf_size;
alsa->has_float = false;
alsa->can_pause = true;
RARCH_LOG("[ALSA QSA]: Can pause: %s.\n",
alsa->can_pause ? "yes" : "no");
return alsa;
error:
return (void*)-1;
}
Error AlsaPMO::Init(OutputInfo* info)
{
int err;
snd_pcm_channel_params_t params;
m_properlyInitialized = false;
if (!info)
{
info = myInfo;
}
else
{
// got info, so this is the beginning...
m_iDataSize = info->max_buffer_size;
err=snd_pcm_open(&m_handle, m_iCard, m_iDevice,
SND_PCM_OPEN_PLAYBACK);
if (err < 0)
{
ReportError("Audio device is busy. Please make sure that "
"another program is not using the device.");
return (Error)pmoError_DeviceOpenFailed;
}
snd_pcm_nonblock_mode(m_handle, 1);
}
// configure the device:
m_channels=info->number_of_channels;
m_rate=info->samples_per_second;
memset(¶ms, 0, sizeof(params));
params.format.format = SND_PCM_SFMT_S16_LE;
params.format.interleave = 1;
params.format.voices = m_channels;
params.format.rate = info->samples_per_second;
params.channel = SND_PCM_CHANNEL_PLAYBACK;
params.mode = SND_PCM_MODE_BLOCK;
params.start_mode = SND_PCM_START_DATA;
params.stop_mode = SND_PCM_STOP_STOP;
params.buf.block.frag_size = m_iDataSize;
params.buf.block.frags_max = 32;
params.buf.block.frags_min = 1;
err = snd_pcm_channel_params(m_handle, ¶ms);
if (err < 0)
{
ReportError("Cannot initialized audio device.");
return (Error)pmoError_DeviceOpenFailed;
}
err = snd_pcm_channel_prepare(m_handle, SND_PCM_CHANNEL_PLAYBACK);
if (err < 0)
{
ReportError("Cannot initialized audio device.");
return (Error)pmoError_DeviceOpenFailed;
}
memcpy(myInfo, info, sizeof(OutputInfo));
snd_pcm_channel_setup_t aInfo;
aInfo.channel = SND_PCM_CHANNEL_PLAYBACK;
err = snd_pcm_channel_setup(m_handle,&aInfo);
if (err < 0)
{
ReportError("Cannot initialized audio device.");
return (Error)pmoError_DeviceOpenFailed;
}
m_iOutputBufferSize = aInfo.buf.block.frag_size * aInfo.buf.block.frags;
m_iBytesPerSample = info->number_of_channels * (info->bits_per_sample / 8);
m_properlyInitialized = true;
return kError_NoErr;
}
/*
open & setup audio device
return: 1=success 0=fail
*/
static int init(int rate_hz, int channels, int format, int flags)
{
int err;
int cards = -1;
snd_pcm_channel_params_t params;
snd_pcm_channel_setup_t setup;
snd_pcm_info_t info;
snd_pcm_channel_info_t chninfo;
mp_msg(MSGT_AO, MSGL_INFO, MSGTR_AO_ALSA5_InitInfo, rate_hz,
channels, af_fmt2str_short(format));
alsa_handler = NULL;
mp_msg(MSGT_AO, MSGL_V, "alsa-init: compiled for ALSA-%s (%d)\n", SND_LIB_VERSION_STR,
SND_LIB_VERSION);
if ((cards = snd_cards()) < 0)
{
mp_msg(MSGT_AO, MSGL_ERR, MSGTR_AO_ALSA5_SoundCardNotFound);
return 0;
}
ao_data.format = format;
ao_data.channels = channels;
ao_data.samplerate = rate_hz;
ao_data.bps = ao_data.samplerate*ao_data.channels;
ao_data.outburst = OUTBURST;
ao_data.buffersize = 16384;
memset(&alsa_format, 0, sizeof(alsa_format));
switch (format)
{
case AF_FORMAT_S8:
alsa_format.format = SND_PCM_SFMT_S8;
break;
case AF_FORMAT_U8:
alsa_format.format = SND_PCM_SFMT_U8;
break;
case AF_FORMAT_U16_LE:
alsa_format.format = SND_PCM_SFMT_U16_LE;
break;
case AF_FORMAT_U16_BE:
alsa_format.format = SND_PCM_SFMT_U16_BE;
break;
case AF_FORMAT_AC3_LE:
case AF_FORMAT_S16_LE:
alsa_format.format = SND_PCM_SFMT_S16_LE;
break;
case AF_FORMAT_AC3_BE:
case AF_FORMAT_S16_BE:
alsa_format.format = SND_PCM_SFMT_S16_BE;
break;
default:
alsa_format.format = SND_PCM_SFMT_MPEG;
break;
}
switch(alsa_format.format)
{
case SND_PCM_SFMT_S16_LE:
case SND_PCM_SFMT_U16_LE:
ao_data.bps *= 2;
break;
case -1:
mp_msg(MSGT_AO, MSGL_ERR, MSGTR_AO_ALSA5_InvalidFormatReq,af_fmt2str_short(format));
return 0;
default:
break;
}
switch(rate_hz)
{
case 8000:
alsa_rate = SND_PCM_RATE_8000;
break;
case 11025:
alsa_rate = SND_PCM_RATE_11025;
break;
case 16000:
alsa_rate = SND_PCM_RATE_16000;
break;
case 22050:
alsa_rate = SND_PCM_RATE_22050;
break;
case 32000:
alsa_rate = SND_PCM_RATE_32000;
break;
case 44100:
alsa_rate = SND_PCM_RATE_44100;
break;
case 48000:
alsa_rate = SND_PCM_RATE_48000;
break;
case 88200:
alsa_rate = SND_PCM_RATE_88200;
break;
case 96000:
alsa_rate = SND_PCM_RATE_96000;
break;
case 176400:
alsa_rate = SND_PCM_RATE_176400;
break;
case 192000:
alsa_rate = SND_PCM_RATE_192000;
break;
default:
alsa_rate = SND_PCM_RATE_CONTINUOUS;
break;
}
alsa_format.rate = ao_data.samplerate;
alsa_format.voices = ao_data.channels;
alsa_format.interleave = 1;
if ((err = snd_pcm_open(&alsa_handler, 0, 0, SND_PCM_OPEN_PLAYBACK)) < 0)
{
mp_msg(MSGT_AO, MSGL_ERR, MSGTR_AO_ALSA5_PlayBackError, snd_strerror(err));
return 0;
}
if ((err = snd_pcm_info(alsa_handler, &info)) < 0)
{
mp_msg(MSGT_AO, MSGL_ERR, MSGTR_AO_ALSA5_PcmInfoError, snd_strerror(err));
return 0;
}
mp_msg(MSGT_AO, MSGL_INFO, MSGTR_AO_ALSA5_SoundcardsFound,
cards, info.name);
if (info.flags & SND_PCM_INFO_PLAYBACK)
{
memset(&chninfo, 0, sizeof(chninfo));
chninfo.channel = SND_PCM_CHANNEL_PLAYBACK;
if ((err = snd_pcm_channel_info(alsa_handler, &chninfo)) < 0)
{
mp_msg(MSGT_AO, MSGL_ERR, MSGTR_AO_ALSA5_PcmChanInfoError, snd_strerror(err));
return 0;
}
#ifndef __QNX__
if (chninfo.buffer_size)
ao_data.buffersize = chninfo.buffer_size;
#endif
mp_msg(MSGT_AO, MSGL_V, "alsa-init: setting preferred buffer size from driver: %d bytes\n",
ao_data.buffersize);
}
memset(¶ms, 0, sizeof(params));
params.channel = SND_PCM_CHANNEL_PLAYBACK;
params.mode = SND_PCM_MODE_STREAM;
params.format = alsa_format;
params.start_mode = SND_PCM_START_DATA;
params.stop_mode = SND_PCM_STOP_ROLLOVER;
params.buf.stream.queue_size = ao_data.buffersize;
params.buf.stream.fill = SND_PCM_FILL_NONE;
if ((err = snd_pcm_channel_params(alsa_handler, ¶ms)) < 0)
{
mp_msg(MSGT_AO, MSGL_ERR, MSGTR_AO_ALSA5_CantSetParms, snd_strerror(err));
return 0;
}
memset(&setup, 0, sizeof(setup));
setup.channel = SND_PCM_CHANNEL_PLAYBACK;
setup.mode = SND_PCM_MODE_STREAM;
setup.format = alsa_format;
setup.buf.stream.queue_size = ao_data.buffersize;
setup.msbits_per_sample = ao_data.bps;
if ((err = snd_pcm_channel_setup(alsa_handler, &setup)) < 0)
{
mp_msg(MSGT_AO, MSGL_ERR, MSGTR_AO_ALSA5_CantSetChan, snd_strerror(err));
return 0;
}
if ((err = snd_pcm_channel_prepare(alsa_handler, SND_PCM_CHANNEL_PLAYBACK)) < 0)
{
mp_msg(MSGT_AO, MSGL_ERR, MSGTR_AO_ALSA5_ChanPrepareError, snd_strerror(err));
return 0;
}
mp_msg(MSGT_AO, MSGL_INFO, "AUDIO: %d Hz/%d channels/%d bps/%d bytes buffer/%s\n",
ao_data.samplerate, ao_data.channels, ao_data.bps, ao_data.buffersize,
snd_pcm_get_format_name(alsa_format.format));
return 1;
}
static gboolean
alsa_open (void *dp)
{
alsa_driver * const d = dp;
int mf, err;
snd_pcm_format_t pf;
// snd_pcm_channel_info_t pcm_info;
snd_pcm_channel_params_t pp;
snd_pcm_channel_setup_t setup;
snd_pcm_channel_flush(d->soundfd, SND_PCM_CHANNEL_PLAYBACK);
memset(&pp, 0, sizeof(pp));
err = snd_pcm_open(&(d->soundfd), d->card_number, d->device_number, SND_PCM_OPEN_PLAYBACK);
if (err != 0) {
char buf[256];
g_sprintf(buf, _("Couldn't open ALSA device for sound output (card:%d, device:%d):\n%s"),
d->card_number, d->device_number, snd_strerror(err));
error_error(buf);
goto out;
}
// ---
// Set non-blocking mode.
// ---
// snd_pcm_nonblock_mode(d->soundfd, 1);
d->outtime = 0;
d->bits = 0;
mf = 0;
// --
// Set channel parameters
// --
pp.mode = SND_PCM_MODE_BLOCK;
pp.channel = SND_PCM_CHANNEL_PLAYBACK;
pp.start_mode = SND_PCM_START_FULL;
pp.stop_mode = SND_PCM_STOP_ROLLOVER;
// ---
// Select audio format
// ---
memset(&pf, 0, sizeof(pf));
pf.interleave = 1;
if (d->p_resolution == 16) {
pf.format = SND_PCM_SFMT_S16_LE;
d->bits = 16;
mf = ST_MIXER_FORMAT_S16_LE;
}
else {
pf.format = SND_PCM_SFMT_U8;
d->bits = 8;
mf = ST_MIXER_FORMAT_S8;
}
pf.rate = d->p_mixfreq;
d->playrate = d->p_mixfreq;
if(d->p_channels == 2) {
d->stereo = 1;
pf.voices = d->p_channels;
mf |= ST_MIXER_FORMAT_STEREO;
}
else {
pf.voices = d->p_channels;
d->stereo = 0;
}
d->mf = mf;
memcpy(&pp.format, &pf, sizeof(pf));
// pp.buf.block.frag_size = d->p_fragsize * pf.voices * (d->bits / 8);
pp.buf.block.frag_size = d->p_fragsize;
pp.buf.block.frags_max = -1;
pp.buf.block.frags_min = 1;
err = snd_pcm_channel_params(d->soundfd, &pp);
if (err < 0) {
error_error(_("Required output-channel parameters not supported.\n"));
goto out;
}
if (snd_pcm_channel_prepare(d->soundfd, SND_PCM_CHANNEL_PLAYBACK) < 0) {
error_error(_("Unable to prepare ALSA channel.\n"));
goto out;
}
// ---
// Get buffering parameters
// ---
memset(&setup, 0, sizeof(setup));
setup.mode = SND_PCM_MODE_BLOCK;
setup.channel = SND_PCM_CHANNEL_PLAYBACK;
err = snd_pcm_channel_setup(d->soundfd, &setup);
if (err < 0) {
error_error(_("Alsa setup error.\n"));
goto out;
}
// snd_pcm_channel_status(d->soundfd, &pbstat);
// d->fragsize = pbstat.fragment_size;
d->numfrags = setup.buf.block.frags;
d->fragsize = setup.buf.block.frag_size;
/* fprintf(stderr, "Numfrags: %d\n", d->numfrags);
fprintf(stderr, "Fragsize: %d\n", d->fragsize); */
d->sndbuf = calloc(1, d->fragsize);
if(d->stereo == 1) {
d->fragsize /= 2;
}
if(d->bits == 16) {
d->fragsize /= 2;
}
d->polltag = audio_poll_add(snd_pcm_file_descriptor(d->soundfd, SND_PCM_CHANNEL_PLAYBACK), GDK_INPUT_WRITE, alsa_poll_ready_playing, d);
/* d->firstpoll = TRUE; */
d->firstpoll = TRUE;
d->playtime = 0;
return TRUE;
out:
alsa_release(dp);
return FALSE;
}
int ao_plugin_open(ao_device *device, ao_sample_format *format)
{
ao_alsa_internal *internal = (ao_alsa_internal *) device->internal;
snd_pcm_channel_params_t param;
int err;
memset(¶m, 0, sizeof(param));
param.channel = SND_PCM_CHANNEL_PLAYBACK;
param.mode = SND_PCM_MODE_BLOCK;
param.format.interleave = 1;
switch (format->bits) {
case 8 : param.format.format = SND_PCM_SFMT_S8;
break;
case 16 : param.format.format =
device->client_byte_format == AO_FMT_BIG ?
SND_PCM_SFMT_S16_BE : SND_PCM_SFMT_S16_LE;
device->driver_byte_format = device->client_byte_format;
break;
default : return 0;
}
if (format->channels == 1 || format->channels == 2)
param.format.voices = format->channels;
else
return 0;
/* Finish filling in the parameter structure */
param.format.rate = format->rate;
param.start_mode = SND_PCM_START_FULL;
param.stop_mode = SND_PCM_STOP_STOP;
param.buf.block.frag_size = internal->buf_size;
param.buf.block.frags_min = 1;
param.buf.block.frags_max = 8;
internal->buf = malloc(internal->buf_size);
internal->buf_end = 0;
if (internal->buf == NULL)
return 0; /* Could not alloc swap buffer */
/* Open the ALSA device */
err = snd_pcm_open(&(internal->pcm_handle),
internal->card,
internal->dev,
SND_PCM_OPEN_PLAYBACK | SND_PCM_OPEN_NONBLOCK);
if (err < 0) {
free(internal->buf);
return 0;
}
err = snd_pcm_channel_params(internal->pcm_handle, ¶m);
if (err < 0) {
snd_pcm_close(internal->pcm_handle);
free(internal->buf);
return 0;
}
snd_pcm_nonblock_mode(internal->pcm_handle, 0);
snd_pcm_channel_prepare(internal->pcm_handle,
SND_PCM_CHANNEL_PLAYBACK);
return 1;
}
qboolean
SNDDMA_Init (void)
{
int rc = 0, i;
char *err_msg = "";
int rate = -1, format = -1, bps, stereo = -1, frag_size;
unsigned int mask;
mask = snd_cards_mask ();
if (!mask) {
Con_Printf ("No sound cards detected\n");
return 0;
}
if ((i = COM_CheckParm ("-sndcard")) != 0) {
card = atoi (com_argv[i + 1]);
}
if ((i = COM_CheckParm ("-snddev")) != 0) {
dev = atoi (com_argv[i + 1]);
}
if ((i = COM_CheckParm ("-sndbits")) != 0) {
i = atoi (com_argv[i + 1]);
if (i == 16) {
format = SND_PCM_SFMT_S16_LE;
} else if (i == 8) {
format = SND_PCM_SFMT_U8;
} else {
Con_Printf ("Error: invalid sample bits: %d\n", i);
return 0;
}
}
if ((i = COM_CheckParm ("-sndspeed")) != 0) {
rate = atoi (com_argv[i + 1]);
if (rate != 44100 && rate != 22050 && rate != 11025) {
Con_Printf ("Error: invalid sample rate: %d\n", rate);
return 0;
}
}
if ((i = COM_CheckParm ("-sndmono")) != 0) {
stereo = 0;
}
if (card == -1) {
for (card = 0; card < SND_CARDS; card++) {
if (!(mask & (1 << card)))
continue;
rc = check_card (card);
if (rc < 0)
return 0;
if (!rc)
goto dev_openned;
}
} else {
if (dev == -1) {
rc = check_card (card);
if (rc < 0)
return 0;
if (!rc)
goto dev_openned;
} else {
if ((rc = snd_pcm_open (&pcm_handle, card, dev,
SND_PCM_OPEN_PLAYBACK
| SND_PCM_OPEN_NONBLOCK)) < 0) {
Con_Printf ("Error: audio open error: %s\n", snd_strerror (rc));
return 0;
}
goto dev_openned;
}
}
Con_Printf ("Error: audio open error: %s\n", snd_strerror (rc));
return 0;
dev_openned:
Con_Printf ("Using card %d, device %d.\n", card, dev);
memset (&cinfo, 0, sizeof (cinfo));
cinfo.channel = SND_PCM_CHANNEL_PLAYBACK;
snd_pcm_channel_info (pcm_handle, &cinfo);
Con_Printf ("%08x %08x %08x\n", cinfo.flags, cinfo.formats, cinfo.rates);
if ((rate == -1 || rate == 44100) && cinfo.rates & SND_PCM_RATE_44100) {
rate = 44100;
frag_size = 512; /* assuming stereo 8 bit */
} else if ((rate == -1 || rate == 22050)
&& cinfo.rates & SND_PCM_RATE_22050) {
rate = 22050;
frag_size = 256; /* assuming stereo 8 bit */
} else if ((rate == -1 || rate == 11025)
&& cinfo.rates & SND_PCM_RATE_11025) {
rate = 11025;
frag_size = 128; /* assuming stereo 8 bit */
} else {
Con_Printf ("ALSA: desired rates not supported\n");
goto error_2;
}
if ((format == -1 || format == SND_PCM_SFMT_S16_LE)
&& cinfo.formats & SND_PCM_FMT_S16_LE) {
format = SND_PCM_SFMT_S16_LE;
bps = 16;
frag_size *= 2;
} else if ((format == -1 || format == SND_PCM_SFMT_U8)
&& cinfo.formats & SND_PCM_FMT_U8) {
format = SND_PCM_SFMT_U8;
bps = 8;
} else {
Con_Printf ("ALSA: desired formats not supported\n");
goto error_2;
}
if (stereo && cinfo.max_voices >= 2) {
stereo = 1;
} else {
stereo = 0;
frag_size /= 2;
}
// err_msg="audio flush";
// if ((rc=snd_pcm_channel_flush(pcm_handle, SND_PCM_CHANNEL_PLAYBACK))<0)
// goto error;
err_msg = "audio munmap";
if ((rc = snd_pcm_munmap (pcm_handle, SND_PCM_CHANNEL_PLAYBACK)) < 0)
goto error;
memset (¶ms, 0, sizeof (params));
params.channel = SND_PCM_CHANNEL_PLAYBACK;
params.mode = SND_PCM_MODE_BLOCK;
params.format.interleave = 1;
params.format.format = format;
params.format.rate = rate;
params.format.voices = stereo + 1;
params.start_mode = SND_PCM_START_GO;
params.stop_mode = SND_PCM_STOP_ROLLOVER;
params.buf.block.frag_size = frag_size;
params.buf.block.frags_min = 1;
params.buf.block.frags_max = -1;
// err_msg="audio flush";
// if ((rc=snd_pcm_channel_flush(pcm_handle, SND_PCM_CHANNEL_PLAYBACK))<0)
// goto error;
err_msg = "audio params";
if ((rc = snd_pcm_channel_params (pcm_handle, ¶ms)) < 0)
goto error;
err_msg = "audio mmap";
if (
(rc =
snd_pcm_mmap (pcm_handle, SND_PCM_CHANNEL_PLAYBACK, &mmap_control,
(void **) &mmap_data)) < 0)
goto error;
err_msg = "audio prepare";
if ((rc = snd_pcm_plugin_prepare (pcm_handle, SND_PCM_CHANNEL_PLAYBACK)) <
0) goto error;
memset (&setup, 0, sizeof (setup));
setup.mode = SND_PCM_MODE_BLOCK;
setup.channel = SND_PCM_CHANNEL_PLAYBACK;
err_msg = "audio setup";
if ((rc = snd_pcm_channel_setup (pcm_handle, &setup)) < 0)
goto error;
shm = &sn;
memset ((dma_t *) shm, 0, sizeof (*shm));
shm->splitbuffer = 0;
shm->channels = setup.format.voices;
shm->submission_chunk = 128; // don't mix less than this #
shm->samplepos = 0; // in mono samples
shm->samplebits = setup.format.format == SND_PCM_SFMT_S16_LE ? 16 : 8;
shm->samples =
setup.buf.block.frags * setup.buf.block.frag_size / (shm->samplebits / 8); // mono
// samples
// in
// buffer
shm->speed = setup.format.rate;
shm->buffer = (unsigned char *) mmap_data;
Con_Printf ("%5d stereo\n", shm->channels - 1);
Con_Printf ("%5d samples\n", shm->samples);
Con_Printf ("%5d samplepos\n", shm->samplepos);
Con_Printf ("%5d samplebits\n", shm->samplebits);
Con_Printf ("%5d submission_chunk\n", shm->submission_chunk);
Con_Printf ("%5d speed\n", shm->speed);
Con_Printf ("0x%x dma buffer\n", (int) shm->buffer);
Con_Printf ("%5d total_channels\n", total_channels);
snd_inited = 1;
return 1;
error:
Con_Printf ("Error: %s: %s\n", err_msg, snd_strerror (rc));
error_2:
snd_pcm_close (pcm_handle);
return 0;
}