/** Fill buffers, for starting and stopping
* Alsa won't start playing until everything is filled up
* This also updates mmap_pos
*
* Returns: Amount of periods in use so snd_pcm_avail_update
* doesn't have to be called up to 4x in GetPosition()
*/
static snd_pcm_uframes_t CommitAll(IDsDriverBufferImpl *This)
{
const snd_pcm_channel_area_t *areas;
snd_pcm_uframes_t used;
const snd_pcm_uframes_t commitahead = This->mmap_commitahead;
used = This->mmap_buflen_frames - snd_pcm_avail_update(This->pcm);
TRACE("%p needs to commit to %lu, used: %lu\n", This, commitahead, used);
if (used < commitahead)
{
snd_pcm_uframes_t done, putin = commitahead - used;
snd_pcm_mmap_begin(This->pcm, &areas, &This->mmap_pos, &putin);
done = snd_pcm_mmap_commit(This->pcm, This->mmap_pos, putin);
This->mmap_pos += done;
used += done;
putin = commitahead - used;
if (This->mmap_pos == This->mmap_buflen_frames && (snd_pcm_sframes_t)putin > 0)
{
snd_pcm_mmap_begin(This->pcm, &areas, &This->mmap_pos, &putin);
done = snd_pcm_mmap_commit(This->pcm, This->mmap_pos, putin);
This->mmap_pos += done;
used += done;
}
}
if (This->mmap_pos == This->mmap_buflen_frames)
This->mmap_pos = 0;
return used;
}
static HRESULT WINAPI IDsDriverBufferImpl_Unlock(PIDSDRIVERBUFFER iface,
LPVOID pvAudio1,DWORD dwLen1,
LPVOID pvAudio2,DWORD dwLen2)
{
IDsDriverBufferImpl *This = (IDsDriverBufferImpl *)iface;
snd_pcm_uframes_t writepos;
if (!dwLen1)
return DS_OK;
/* **** */
EnterCriticalSection(&This->pcm_crst);
writepos = snd_pcm_bytes_to_frames(This->pcm, (DWORD_PTR)pvAudio1 - (DWORD_PTR)This->mmap_buffer);
if (writepos == This->mmap_pos)
{
const snd_pcm_channel_area_t *areas;
snd_pcm_uframes_t writelen = snd_pcm_bytes_to_frames(This->pcm, dwLen1);
TRACE("Committing data\n");
This->mmap_pos += snd_pcm_mmap_commit(This->pcm, This->mmap_pos, writelen);
if (This->mmap_pos == This->mmap_buflen_frames)
This->mmap_pos = 0;
if (!This->mmap_pos && dwLen2)
{
writelen = snd_pcm_bytes_to_frames(This->pcm, dwLen2);
snd_pcm_mmap_begin(This->pcm, &areas, &This->mmap_pos, &writelen);
This->mmap_pos += snd_pcm_mmap_commit(This->pcm, This->mmap_pos, writelen);
assert(This->mmap_pos < This->mmap_buflen_frames);
}
}
LeaveCriticalSection(&This->pcm_crst);
/* **** */
return DS_OK;
}
/** Fill buffers, for starting and stopping
* Alsa won't start playing until everything is filled up
* This also updates mmap_pos
*
* Returns: Amount of periods in use so snd_pcm_avail_update
* doesn't have to be called up to 4x in GetPosition()
*/
static snd_pcm_uframes_t CommitAll(IDsDriverBufferImpl *This)
{
const snd_pcm_channel_area_t *areas;
snd_pcm_sframes_t used;
const snd_pcm_uframes_t commitahead = This->mmap_commitahead;
used = This->mmap_buflen_frames - snd_pcm_avail_update(This->pcm);
if (used < 0) used = 0;
TRACE("%p needs to commit to %lu, used: %ld\n", This, commitahead, used);
if (used < commitahead)
{
snd_pcm_sframes_t done;
snd_pcm_uframes_t putin = commitahead - used;
if (This->mmap)
{
snd_pcm_mmap_begin(This->pcm, &areas, &This->mmap_pos, &putin);
done = snd_pcm_mmap_commit(This->pcm, This->mmap_pos, putin);
}
else
{
if (putin + This->mmap_pos > This->mmap_buflen_frames)
putin = This->mmap_buflen_frames - This->mmap_pos;
done = snd_pcm_writei(This->pcm, This->mmap_buffer + snd_pcm_frames_to_bytes(This->pcm, This->mmap_pos), putin);
if (done < putin) WARN("Short write %ld/%ld\n", putin, done);
}
if (done < 0) done = 0;
This->mmap_pos += done;
used += done;
putin = commitahead - used;
if (This->mmap_pos == This->mmap_buflen_frames && (snd_pcm_sframes_t)putin > 0)
{
if (This->mmap)
{
snd_pcm_mmap_begin(This->pcm, &areas, &This->mmap_pos, &putin);
done = snd_pcm_mmap_commit(This->pcm, This->mmap_pos, putin);
This->mmap_pos += done;
}
else
{
done = snd_pcm_writei(This->pcm, This->mmap_buffer, putin);
if (done < putin) WARN("Short write %ld/%ld\n", putin, done);
if (done < 0) done = 0;
This->mmap_pos = done;
}
used += done;
}
}
if (This->mmap_pos == This->mmap_buflen_frames)
This->mmap_pos = 0;
return used;
}
static HRESULT WINAPI IDsDriverBufferImpl_Stop(PIDSDRIVERBUFFER iface)
{
const snd_pcm_channel_area_t *areas;
snd_pcm_uframes_t avail;
snd_pcm_format_t format;
IDsDriverBufferImpl *This = (IDsDriverBufferImpl *)iface;
TRACE("(%p)\n",iface);
/* **** */
EnterCriticalSection(&This->pcm_crst);
avail = This->mmap_buflen_frames;
snd_pcm_drop(This->pcm);
snd_pcm_prepare(This->pcm);
avail = snd_pcm_avail_update(This->pcm);
snd_pcm_hw_params_get_format(This->hw_params, &format);
if (This->mmap)
{
snd_pcm_mmap_begin(This->pcm, &areas, &This->mmap_pos, &avail);
snd_pcm_format_set_silence(format, areas->addr, This->mmap_buflen_frames);
snd_pcm_mmap_commit(This->pcm, This->mmap_pos, 0);
}
else
{
snd_pcm_format_set_silence(format, This->mmap_buffer, This->mmap_buflen_frames);
snd_pcm_writei(This->pcm, This->mmap_buffer, This->mmap_buflen_frames);
This->mmap_pos = 0;
}
/* **** */
LeaveCriticalSection(&This->pcm_crst);
return DS_OK;
}
snd_pcm_sframes_t snd_pcm_generic_mmap_commit(snd_pcm_t *pcm,
snd_pcm_uframes_t offset,
snd_pcm_uframes_t size)
{
snd_pcm_generic_t *generic = pcm->private_data;
return snd_pcm_mmap_commit(generic->slave, offset, size);
}
static snd_pcm_sframes_t snd_pcm_mmap_read_areas(snd_pcm_t *pcm,
const snd_pcm_channel_area_t *areas,
snd_pcm_uframes_t offset,
snd_pcm_uframes_t size)
{
snd_pcm_uframes_t xfer = 0;
if (snd_pcm_mmap_capture_avail(pcm) < size) {
SNDMSG("too short avail %ld to size %ld", snd_pcm_mmap_capture_avail(pcm), size);
return -EPIPE;
}
while (size > 0) {
const snd_pcm_channel_area_t *pcm_areas;
snd_pcm_uframes_t pcm_offset;
snd_pcm_uframes_t frames = size;
snd_pcm_sframes_t result;
snd_pcm_mmap_begin(pcm, &pcm_areas, &pcm_offset, &frames);
snd_pcm_areas_copy(areas, offset,
pcm_areas, pcm_offset,
pcm->channels,
frames, pcm->format);
result = snd_pcm_mmap_commit(pcm, pcm_offset, frames);
if (result < 0)
return xfer > 0 ? (snd_pcm_sframes_t)xfer : result;
offset += result;
xfer += result;
size -= result;
}
return (snd_pcm_sframes_t)xfer;
}
/**
* \brief Finish the capture noninterleave frame update (commit data to hardware)
* \param pcm ordinary PCM handle
* \param frames count of updated frames
* \return count of transferred frames on success otherwise a negative error code
*/
snd_pcm_sframes_t sndo_pcm_cio_nend(sndo_pcm_t *pcm, snd_pcm_uframes_t frames)
{
if (frames <= 0)
return -EINVAL;
if (frames % pcm->transfer_block)
return -EINVAL;
return snd_pcm_mmap_commit(pcm->capture, pcm->c_offset, frames);
}
/**
* \brief Finish the playback interleave frame update (commit data to hardware)
* \param pcm ordinary PCM handle
* \param frames count of updated frames
* \return count of transferred frames on success otherwise a negative error code
*/
snd_pcm_sframes_t sndo_pcm_pio_iend(sndo_pcm_t *pcm, snd_pcm_uframes_t frames)
{
if (frames <= 0)
return -EINVAL;
if (frames % pcm->transfer_block)
return -EINVAL;
return snd_pcm_mmap_commit(pcm->playback, pcm->p_offset, frames);
}
mp_sint32 AudioDriver_ALSA::start()
{
const snd_pcm_channel_area_t *my_areas;
snd_pcm_uframes_t offset, frames, size;
snd_async_handler_t *ahandler;
int err;
err = snd_async_add_pcm_handler(&ahandler, pcm, async_direct_callback, this);
if (err < 0) {
fprintf(stderr, "ALSA: Unable to register async handler (%s)\n", snd_strerror(err));
}
for (int count = 0; count < 2; count++) {
size = period_size;
while (size > 0) {
frames = size;
err = snd_pcm_mmap_begin(pcm, &my_areas, &offset, &frames);
if (err < 0) {
if ((err = snd_pcm_recover(pcm, err, 0)) < 0) {
fprintf(stderr, "ALSA: MMAP begin error: %s\n", snd_strerror(err));
}
}
// Sanity check
if (my_areas->step != 32 && my_areas->first != 0)
fprintf(stderr, "ALSA: Unsupported audio format.\n");
memset(static_cast<char*> (my_areas->addr) + offset*4, 0, frames * 4);
int commitres = snd_pcm_mmap_commit(pcm, offset, frames);
if (err < 0 || (snd_pcm_uframes_t)commitres != frames) {
if ((err = snd_pcm_recover(pcm, commitres >= 0 ? -EPIPE : commitres, 0)) < 0) {
fprintf(stderr, "ALSA: MMAP commit error: %s\n", snd_strerror(err));
}
}
size -= frames;
}
}
\
err = snd_pcm_start(pcm);
if (err < 0)
{
fprintf(stderr, "ALSA: Could not start PCM device (%s)\n", snd_strerror(err));
return -1;
}
deviceHasStarted = true;
return 0;
}
static snd_pcm_sframes_t snd_pcm_file_mmap_commit(snd_pcm_t *pcm,
snd_pcm_uframes_t offset,
snd_pcm_uframes_t size)
{
snd_pcm_file_t *file = pcm->private_data;
snd_pcm_uframes_t ofs;
snd_pcm_uframes_t siz = size;
const snd_pcm_channel_area_t *areas;
snd_pcm_sframes_t result;
snd_pcm_mmap_begin(file->gen.slave, &areas, &ofs, &siz);
assert(ofs == offset && siz == size);
result = snd_pcm_mmap_commit(file->gen.slave, ofs, siz);
if (result > 0)
snd_pcm_file_add_frames(pcm, areas, ofs, result);
return result;
}
int alsa_async_direct_loop(alsa_dev_t *dev, void *ptr, void (*callback)(snd_async_handler_t *))
{
snd_async_handler_t *ahandler;
snd_pcm_t *phandle = dev->phandle;
snd_pcm_t *chandle = dev->chandle;
snd_pcm_uframes_t period_size = dev->period_size;
pc_data_t *data = (pc_data_t *) ptr;
PartConvMulti *pc = data->pc;
const snd_pcm_channel_area_t *my_areas;
snd_pcm_uframes_t offset, frames;
snd_pcm_sframes_t avail, commitres;
int err;
err = snd_async_add_pcm_handler(&ahandler, phandle, callback, ptr);
if (err < 0) {
printf("Unable to register async handler\n");
exit(-1);
}
do {
avail = snd_pcm_avail_update(phandle);
if (avail == 0)
break;
// printf("\nADL: avail_playback == %d\n", avail);
frames = period_size;
err = snd_pcm_mmap_begin(phandle, &my_areas, &offset, &frames);
if (err < 0) {
printf("MMAP begin avail error: %s\n", snd_strerror(err));
exit(-1);
}
if (frames != period_size)
{
printf("Error: [ADL] frames != period_size (%d != %d) after snd_pcm_mmap_begin()\n", (int)frames, (int)period_size);
exit(-1);
}
commitres = snd_pcm_mmap_commit(phandle, offset, frames);
if (commitres < 0 || (snd_pcm_uframes_t)commitres != frames) {
printf("MMAP commit error: %s\n", snd_strerror(err));
exit(-1);
}
avail = snd_pcm_avail_update(phandle);
} while (1);
do
{
avail = snd_pcm_avail_update(chandle);
if (avail == 0)
break;
// printf("\nADL: avail_capture == %d\n", avail);
frames = period_size;
err = snd_pcm_mmap_begin(chandle, &my_areas, &offset, &frames);
if (err < 0) {
printf("MMAP begin avail error: %s\n", snd_strerror(err));
exit(-1);
}
if (frames != period_size)
{
printf("Error: [ADL] frames != period_size (%d != %d) after snd_pcm_mmap_begin()\n", (int)frames, (int)period_size);
exit(-1);
}
commitres = snd_pcm_mmap_commit(chandle, offset, frames);
if (commitres < 0 || (snd_pcm_uframes_t)commitres != frames) {
printf("MMAP commit error: %s\n", snd_strerror(err));
exit(-1);
}
avail = snd_pcm_avail_update(chandle);
} while (1);
printf("About to start playback.\n");
err = snd_pcm_start(phandle);
if (err < 0) {
printf("Playback start error: %s\n", snd_strerror(err));
exit(-1);
}
/* because all other work is done in the signal handler,
suspend the process */
if (pc->lastFrame == 0)
{
while(1)
{
printf("enter to exit: \n");
if (getc(stdin) == '\n')
break;
}
}
else
{
printf("running for %d frames\n", pc->lastFrame);
pc->doneWaiter->waitFor(1);
}
return 0;
}
static void set_params(void)
{
snd_pcm_hw_params_t *params;
snd_pcm_sw_params_t *swparams;
snd_pcm_uframes_t buffer_size;
int err;
size_t n;
unsigned int rate;
snd_pcm_uframes_t start_threshold, stop_threshold;
snd_pcm_hw_params_alloca(¶ms);
snd_pcm_sw_params_alloca(&swparams);
err = snd_pcm_hw_params_any(handle, params);
if (err < 0) {
error("Broken configuration for this PCM: no configurations available");
exit(EXIT_FAILURE);
}
if (mmap_flag) {
snd_pcm_access_mask_t *mask = alloca(snd_pcm_access_mask_sizeof());
snd_pcm_access_mask_none(mask);
snd_pcm_access_mask_set(mask, SND_PCM_ACCESS_MMAP_INTERLEAVED);
snd_pcm_access_mask_set(mask, SND_PCM_ACCESS_MMAP_NONINTERLEAVED);
snd_pcm_access_mask_set(mask, SND_PCM_ACCESS_MMAP_COMPLEX);
err = snd_pcm_hw_params_set_access_mask(handle, params, mask);
} else if (interleaved)
err = snd_pcm_hw_params_set_access(handle, params,
SND_PCM_ACCESS_RW_INTERLEAVED);
else
err = snd_pcm_hw_params_set_access(handle, params,
SND_PCM_ACCESS_RW_NONINTERLEAVED);
if (err < 0) {
error("Access type not available");
exit(EXIT_FAILURE);
}
err = snd_pcm_hw_params_set_format(handle, params, hwparams.format);
if (err < 0) {
error("Sample format non available");
exit(EXIT_FAILURE);
}
err = snd_pcm_hw_params_set_channels(handle, params, hwparams.channels);
if (err < 0) {
error("Channels count non available");
exit(EXIT_FAILURE);
}
#if 0
err = snd_pcm_hw_params_set_periods_min(handle, params, 2);
assert(err >= 0);
#endif
rate = hwparams.rate;
err = snd_pcm_hw_params_set_rate_near(handle, params, &hwparams.rate, 0);
assert(err >= 0);
if ((float)rate * 1.05 < hwparams.rate || (float)rate * 0.95 > hwparams.rate) {
if (!quiet_mode) {
char plugex[64];
const char *pcmname = snd_pcm_name(handle);
fprintf(stderr, "Warning: rate is not accurate (requested = %iHz, got = %iHz)\n", rate, hwparams.rate);
if (! pcmname || strchr(snd_pcm_name(handle), ':'))
*plugex = 0;
else
snprintf(plugex, sizeof(plugex), "(-Dplug:%s)",
snd_pcm_name(handle));
fprintf(stderr, " please, try the plug plugin %s\n",
plugex);
}
}
rate = hwparams.rate;
if (buffer_time == 0 && buffer_frames == 0) {
err = snd_pcm_hw_params_get_buffer_time_max(params,
&buffer_time, 0);
assert(err >= 0);
if (buffer_time > 500000)
buffer_time = 500000;
}
if (period_time == 0 && period_frames == 0) {
if (buffer_time > 0)
period_time = buffer_time / 4;
else
period_frames = buffer_frames / 4;
}
if (period_time > 0)
err = snd_pcm_hw_params_set_period_time_near(handle, params,
&period_time, 0);
else
err = snd_pcm_hw_params_set_period_size_near(handle, params,
&period_frames, 0);
assert(err >= 0);
if (buffer_time > 0) {
err = snd_pcm_hw_params_set_buffer_time_near(handle, params,
&buffer_time, 0);
} else {
err = snd_pcm_hw_params_set_buffer_size_near(handle, params,
&buffer_frames);
}
assert(err >= 0);
err = snd_pcm_hw_params(handle, params);
if (err < 0) {
error("Unable to install hw params:");
snd_pcm_hw_params_dump(params, log);
exit(EXIT_FAILURE);
}
snd_pcm_hw_params_get_period_size(params, &chunk_size, 0);
snd_pcm_hw_params_get_buffer_size(params, &buffer_size);
if (chunk_size == buffer_size) {
error("Can't use period equal to buffer size (%lu == %lu)",
chunk_size, buffer_size);
exit(EXIT_FAILURE);
}
snd_pcm_sw_params_current(handle, swparams);
if (avail_min < 0)
n = chunk_size;
else
n = (double) rate * avail_min / 1000000;
err = snd_pcm_sw_params_set_avail_min(handle, swparams, n);
if (err < 0) {
error("Setting sw params failed\n");
}
/* round up to closest transfer boundary */
n = buffer_size;
if (start_delay <= 0) {
start_threshold = n + (double) rate * start_delay / 1000000;
} else
start_threshold = (double) rate * start_delay / 1000000;
if (start_threshold < 1)
start_threshold = 1;
if (start_threshold > n)
start_threshold = n;
err = snd_pcm_sw_params_set_start_threshold(handle, swparams, start_threshold);
assert(err >= 0);
if (stop_delay <= 0)
stop_threshold = buffer_size + (double) rate * stop_delay / 1000000;
else
stop_threshold = (double) rate * stop_delay / 1000000;
err = snd_pcm_sw_params_set_stop_threshold(handle, swparams, stop_threshold);
assert(err >= 0);
if (snd_pcm_sw_params(handle, swparams) < 0) {
error("unable to install sw params:");
snd_pcm_sw_params_dump(swparams, log);
exit(EXIT_FAILURE);
}
if (verbose)
snd_pcm_dump(handle, log);
bits_per_sample = snd_pcm_format_physical_width(hwparams.format);
bits_per_frame = bits_per_sample * hwparams.channels;
chunk_bytes = chunk_size * bits_per_frame / 8;
audiobuf = realloc(audiobuf, chunk_bytes);
if (audiobuf == NULL) {
error("not enough memory");
exit(EXIT_FAILURE);
}
// fprintf(stderr, "real chunk_size = %i, frags = %i, total = %i\n", chunk_size, setup.buf.block.frags, setup.buf.block.frags * chunk_size);
/* stereo VU-meter isn't always available... */
if (vumeter == VUMETER_STEREO) {
if (hwparams.channels != 2 || !interleaved || verbose > 2)
vumeter = VUMETER_MONO;
}
/* show mmap buffer arragment */
if (mmap_flag && verbose) {
const snd_pcm_channel_area_t *areas;
snd_pcm_uframes_t offset;
int i;
err = snd_pcm_mmap_begin(handle, &areas, &offset, &chunk_size);
if (err < 0) {
error("snd_pcm_mmap_begin problem: %s", snd_strerror(err));
exit(EXIT_FAILURE);
}
for (i = 0; i < hwparams.channels; i++)
fprintf(stderr, "mmap_area[%i] = %p,%u,%u (%u)\n", i, areas[i].addr, areas[i].first, areas[i].step, snd_pcm_format_physical_width(hwparams.format));
/* not required, but for sure */
snd_pcm_mmap_commit(handle, offset, 0);
}
buffer_frames = buffer_size; /* for position test */
}
/** Fill buffers, for starting and stopping
* Alsa won't start playing until everything is filled up
* This also updates mmap_pos
*
* Returns: Amount of periods in use so snd_pcm_avail_update
* doesn't have to be called up to 4x in GetPosition()
*/
static snd_pcm_uframes_t CommitAll(IDsCaptureDriverBufferImpl *This, DWORD forced)
{
const snd_pcm_channel_area_t *areas;
snd_pcm_uframes_t used;
const snd_pcm_uframes_t commitahead = This->mmap_buflen_frames;
used = This->mmap_buflen_frames - snd_pcm_avail_update(This->pcm);
TRACE("%p needs to commit to %lu, used: %lu\n", This, commitahead, used);
if (used < commitahead && (forced || This->play_looping))
{
snd_pcm_uframes_t done, putin = commitahead - used;
if (This->mmap)
{
snd_pcm_mmap_begin(This->pcm, &areas, &This->mmap_pos, &putin);
CopyData(This, This->mmap_pos, putin);
done = snd_pcm_mmap_commit(This->pcm, This->mmap_pos, putin);
This->mmap_pos += done;
used += done;
putin = commitahead - used;
if (This->mmap_pos == This->mmap_buflen_frames && (snd_pcm_sframes_t)putin > 0 && This->play_looping)
{
This->mmap_ofs_bytes += snd_pcm_frames_to_bytes(This->pcm, This->mmap_buflen_frames);
This->mmap_ofs_bytes %= This->mmap_buflen_bytes;
snd_pcm_mmap_begin(This->pcm, &areas, &This->mmap_pos, &putin);
CopyData(This, This->mmap_pos, putin);
done = snd_pcm_mmap_commit(This->pcm, This->mmap_pos, putin);
This->mmap_pos += done;
used += done;
}
}
else
{
DWORD pos;
snd_pcm_sframes_t ret;
snd_pcm_uframes_t cap = snd_pcm_bytes_to_frames(This->pcm, This->mmap_buflen_bytes);
pos = realpos_to_fakepos(This, This->mmap_pos);
if (This->mmap_pos + putin > cap)
putin = cap - This->mmap_pos;
ret = snd_pcm_readi(This->pcm, This->presented_buffer + pos, putin);
if (ret == -EPIPE)
{
WARN("Underrun occurred\n");
snd_pcm_prepare(This->pcm);
ret = snd_pcm_readi(This->pcm, This->presented_buffer + pos, putin);
snd_pcm_start(This->pcm);
}
if (ret < 0)
{
WARN("Committing data: %ld / %s (%ld)\n", ret, snd_strerror(ret), putin);
ret = 0;
}
This->mmap_pos += ret;
used += ret;
/* At this point mmap_pos may be >= This->mmap_pos this is harmless
* realpos_to_fakepos handles it well, and below it is truncated
*/
putin = commitahead - used;
if (putin > 0)
{
pos = realpos_to_fakepos(This, This->mmap_pos);
ret = snd_pcm_readi(This->pcm, This->presented_buffer + pos, putin);
if (ret > 0)
{
This->mmap_pos += ret;
used += ret;
}
}
}
}
if (This->mmap_pos >= This->mmap_buflen_frames)
{
This->mmap_ofs_bytes += snd_pcm_frames_to_bytes(This->pcm, This->mmap_buflen_frames);
This->mmap_ofs_bytes %= This->mmap_buflen_bytes;
This->mmap_pos -= This->mmap_buflen_frames;
}
return used;
}
int alsamm_send_dacs(void)
{
static double timenow,timelast;
t_sample *fpo, *fpi, *fp1, *fp2;
int i, err, devno;
const snd_pcm_channel_area_t *my_areas;
snd_pcm_sframes_t size;
snd_pcm_sframes_t commitres;
snd_pcm_state_t state;
snd_pcm_sframes_t ooffset, oavail;
snd_pcm_sframes_t ioffset, iavail;
/*
unused channels should be zeroed out on startup (open) and stay this
*/
int inchannels = STUFF->st_inchannels;
int outchannels = STUFF->st_outchannels;
timelast = sys_getrealtime();
#ifdef ALSAMM_DEBUG
if(dac_send++ < 0)
post("dac send called in %d, out %d, xrun %d",inchannels,outchannels, alsamm_xruns);
if(alsamm_xruns && (alsamm_xruns % 1000) == 0)
post("1000 xruns accoured");
if(dac_send < WATCH_PERIODS){
out_cm[dac_send] = -1;
in_avail[dac_send] = out_avail[dac_send] = -1;
in_offset[dac_send] = out_offset[dac_send] = -1;
outaddr[dac_send] = inaddr[dac_send] = NULL;
xruns_watch[dac_send] = alsamm_xruns;
}
#endif
if (!inchannels && !outchannels)
{
return SENDDACS_NO;
}
/* here we should check if in and out samples are here.
but, the point is if out samples available also in sample should,
so we don't make a precheck of insamples here and let outsample check be the
the first of the forst card.
*/
/* OUTPUT Transfer */
fpo = STUFF->st_soundout;
for(devno = 0;devno < alsa_noutdev;devno++){
t_alsa_dev *dev = &alsa_outdev[devno];
snd_pcm_t *out = dev->a_handle;
int ochannels =dev->a_channels;
/* how much samples available ??? */
oavail = snd_pcm_avail_update(out);
/* only one reason i can think about,
the driver stopped and says broken pipe
so this should not happen if we have enough stopthreshhold
but if try to restart with next commit
*/
if (oavail < 0) {
#ifdef ALSAMM_DEBUG
broken_opipe++;
#endif
err = xrun_recovery(out, -EPIPE);
if (err < 0) {
check_error(err,"otavail<0 recovery failed");
return SENDDACS_NO;
}
oavail = snd_pcm_avail_update(out);
}
/* check if we are late and have to (able to) catch up */
/* xruns will be ignored since you cant do anything since already happened */
state = snd_pcm_state(out);
if (state == SND_PCM_STATE_XRUN) {
err = xrun_recovery(out, -EPIPE);
if (err < 0) {
check_error(err,"DAC XRUN recovery failed");
return SENDDACS_NO;
}
oavail = snd_pcm_avail_update(out);
} else if (state == SND_PCM_STATE_SUSPENDED) {
err = xrun_recovery(out, -ESTRPIPE);
if (err < 0) {
check_error(err,"DAC SUSPEND recovery failed");
return SENDDACS_NO;
}
oavail = snd_pcm_avail_update(out);
}
#ifdef ALSAMM_DEBUG
if(dac_send < WATCH_PERIODS){
out_avail[dac_send] = oavail;
}
#endif
/* we only transfer transfersize of bytes request,
this should only happen on first card otherwise we got a problem :-(()*/
if(oavail < alsamm_transfersize){
return SENDDACS_NO;
}
/* transfer now */
size = alsamm_transfersize;
fp1 = fpo;
ooffset = 0;
/* since this can go over a buffer boundery we maybe need two steps to
transfer (normally when buffersize is a multiple of transfersize
this should never happen) */
while (size > 0) {
int chn;
snd_pcm_sframes_t oframes;
oframes = size;
err = alsamm_get_channels(out, (unsigned long *)&oframes,
(unsigned long *)&ooffset,ochannels,dev->a_addr);
#ifdef ALSAMM_DEBUG
if(dac_send < WATCH_PERIODS){
out_offset[dac_send] = ooffset;
outaddr[dac_send] = (char *) dev->a_addr[0];
}
#endif
if (err < 0){
if ((err = xrun_recovery(out, err)) < 0) {
check_error(err,"MMAP begins avail error");
break; /* next card please */
}
}
/* transfer into memory */
for (chn = 0; chn < ochannels; chn++) {
t_alsa_sample32 *buf = (t_alsa_sample32 *)dev->a_addr[chn];
/*
osc(buf, oframes, (dac_send%1000 < 500)?-100.0:-10.0,440,&(indexes[chn]));
*/
for (i = 0, fp2 = fp1 + chn*alsamm_transfersize; i < oframes; i++,fp2++)
{
float s1 = *fp2 * F32MAX;
/* better but slower, better never clip ;-)
buf[i]= CLIP32(s1); */
buf[i]= ((int) s1 & 0xFFFFFF00);
*fp2 = 0.0;
}
}
commitres = snd_pcm_mmap_commit(out, ooffset, oframes);
if (commitres < 0 || commitres != oframes) {
if ((err = xrun_recovery(out, commitres >= 0 ? -EPIPE : commitres)) < 0) {
check_error(err,"MMAP commit error");
return SENDDACS_NO;
}
}
#ifdef ALSAMM_DEBUG
if(dac_send < WATCH_PERIODS)
out_cm[dac_send] = oframes;
#endif
fp1 += oframes;
size -= oframes;
} /* while size */
fpo += ochannels*alsamm_transfersize;
}/* for devno */
fpi = STUFF->st_soundin; /* star first card first channel */
for(devno = 0;devno < alsa_nindev;devno++){
t_alsa_dev *dev = &alsa_indev[devno];
snd_pcm_t *in = dev->a_handle;
int ichannels = dev->a_channels;
iavail = snd_pcm_avail_update(in);
if (iavail < 0) {
err = xrun_recovery(in, iavail);
if (err < 0) {
check_error(err,"input avail update failed");
return SENDDACS_NO;
}
iavail=snd_pcm_avail_update(in);
}
state = snd_pcm_state(in);
if (state == SND_PCM_STATE_XRUN) {
err = xrun_recovery(in, -EPIPE);
if (err < 0) {
check_error(err,"ADC XRUN recovery failed");
return SENDDACS_NO;
}
iavail=snd_pcm_avail_update(in);
} else if (state == SND_PCM_STATE_SUSPENDED) {
err = xrun_recovery(in, -ESTRPIPE);
if (err < 0) {
check_error(err,"ADC SUSPEND recovery failed");
return SENDDACS_NO;
}
iavail=snd_pcm_avail_update(in);
}
/* only transfer full transfersize or nothing */
if(iavail < alsamm_transfersize){
return SENDDACS_NO;
}
size = alsamm_transfersize;
fp1 = fpi;
ioffset = 0;
/* since sysdata can go over a driver buffer boundery we maybe need two steps to
transfer (normally when buffersize is a multiple of transfersize
this should never happen) */
while(size > 0){
int chn;
snd_pcm_sframes_t iframes = size;
err = alsamm_get_channels(in,
(unsigned long *)&iframes, (unsigned long *)&ioffset,ichannels,dev->a_addr);
if (err < 0){
if ((err = xrun_recovery(in, err)) < 0) {
check_error(err,"MMAP begins avail error");
return SENDDACS_NO;
}
}
#ifdef ALSAMM_DEBUG
if(dac_send < WATCH_PERIODS){
in_avail[dac_send] = iavail;
in_offset[dac_send] = ioffset;
inaddr[dac_send] = dev->a_addr[0];
}
#endif
/* transfer into memory */
for (chn = 0; chn < ichannels; chn++) {
t_alsa_sample32 *buf = (t_alsa_sample32 *) dev->a_addr[chn];
for (i = 0, fp2 = fp1 + chn*alsamm_transfersize; i < iframes; i++,fp2++)
{
/* mask the lowest bits, since subchannels info can make zero samples nonzero */
*fp2 = (float) ((t_alsa_sample32) (buf[i] & 0xFFFFFF00))
* (1.0 / (float) INT32_MAX);
}
}
commitres = snd_pcm_mmap_commit(in, ioffset, iframes);
if (commitres < 0 || commitres != iframes) {
post("please never");
if ((err = xrun_recovery(in, commitres >= 0 ? -EPIPE : commitres)) < 0) {
check_error(err,"MMAP synced in commit error");
return SENDDACS_NO;
}
}
fp1 += iframes;
size -= iframes;
}
fpi += ichannels*alsamm_transfersize;
} /* for out devno < alsamm_outcards*/
if ((timenow = sys_getrealtime()) > (timelast + sleep_time))
{
#ifdef ALSAMM_DEBUG
if(dac_send < 10 && sys_verbose)
post("slept %f > %f + %f (=%f)",
timenow,timelast,sleep_time,(timelast + sleep_time));
#endif
return (SENDDACS_SLEPT);
}
return SENDDACS_YES;
}
static int alsamm_start()
{
int err = 0;
int devno;
int chn,nchns;
const snd_pcm_channel_area_t *mm_areas;
#ifdef ALSAMM_DEBUG
if(sys_verbose)
post("start audio with %d out cards and %d incards",alsamm_outcards,alsamm_incards);
#endif
/* first prepare for in/out */
for(devno = 0;devno < alsa_noutdev;devno++){
snd_pcm_uframes_t offset, avail;
t_alsa_dev *dev = &alsa_outdev[devno];
/* snd_pcm_prepare also in xrun, but cannot harm here */
if ((err = snd_pcm_prepare (dev->a_handle)) < 0) {
check_error (err,"outcard prepare error for playback");
return err;
}
offset = 0;
avail = snd_pcm_avail_update(dev->a_handle);
if (avail != (snd_pcm_uframes_t) alsamm_buffer_size) {
check_error (avail,"full buffer not available at start");
}
/* cleaning out mmap buffer before start */
#ifdef ALSAMM_DEBUG
if(sys_verbose)
post("start: set mems for avail=%d,offset=%d at buffersize=%d",
avail,offset,alsamm_buffer_size);
#endif
if(avail > 0){
int comitted = 0;
if ((err = alsamm_get_channels(dev->a_handle, &avail, &offset,
dev->a_channels,dev->a_addr)) < 0) {
check_error(err,"setting initial out channelspointer failure ?");
continue;
}
for (chn = 0; chn < dev->a_channels; chn++)
memset(dev->a_addr[chn],0,avail*ALSAMM_SAMPLEWIDTH_32);
comitted = snd_pcm_mmap_commit (dev->a_handle, offset, avail);
avail = snd_pcm_avail_update(dev->a_handle);
#ifdef ALSAMM_DEBUG
if(sys_verbose)
post("start: now channels cleared, out with avail=%d, offset=%d,comitted=%d",
avail,offset,comitted);
#endif
}
/* now start, should be autostarted */
avail = snd_pcm_avail_update(dev->a_handle);
#ifdef ALSAMM_DEBUG
if(sys_verbose)
post("start: finish start, out with avail=%d, offset=%d",avail,offset);
#endif
/* we have no autostart so anyway start*/
if ((err = snd_pcm_start (dev->a_handle)) < 0) {
check_error (err,"could not start playback");
}
}
for(devno = 0;devno < alsa_nindev;devno++){
snd_pcm_uframes_t ioffset, iavail;
t_alsa_dev *dev = &alsa_indev[devno];
/* if devices are synced then don't need to prepare
hopefully dma in areas already filled correct by the card */
if(dev->a_synced == 0){
if ((err = snd_pcm_prepare (dev->a_handle)) < 0) {
check_error (err,"incard prepare error for capture");
/* return err;*/
}
}
ioffset = 0;
iavail = snd_pcm_avail_update (dev->a_handle);
/* cleaning out mmap buffer before start */
#ifdef ALSAMM_DEBUG
post("start in: set in mems for avail=%d,offset=%d at buffersize=%d",
iavail,ioffset,alsamm_buffer_size);
#endif
if (iavail > (snd_pcm_uframes_t) 0) {
#ifdef ALSAMM_DEBUG
post("empty buffer not available at start, since avail %d != %d buffersize",
iavail, alsamm_buffer_size);
#endif
if ((err = alsamm_get_channels(dev->a_handle, &iavail, &ioffset,
dev->a_channels,dev->a_addr)) < 0) {
check_error(err,"getting in channelspointer failure ????");
continue;
}
snd_pcm_mmap_commit (dev->a_handle, ioffset, iavail);
iavail = snd_pcm_avail_update (dev->a_handle);
#ifdef ALSAMM_DEBUG
post("start in now avail=%d",iavail);
#endif
}
#ifdef ALSAMM_DEBUG
post("start: init inchannels with avail=%d, offset=%d",iavail,ioffset);
#endif
/* if devices are synced then don't need to start */
/* start with autostart , but anyway start */
if(dev->a_synced == 0){
if ((err = snd_pcm_start (dev->a_handle)) < 0) {
check_error (err,"could not start capture");
continue;
}
}
}
return err;
}
static ALuint ALSAProc(ALvoid *ptr)
{
ALCdevice *Device = (ALCdevice*)ptr;
alsa_data *data = (alsa_data*)Device->ExtraData;
const snd_pcm_channel_area_t *areas = NULL;
snd_pcm_uframes_t update_size, num_updates;
snd_pcm_sframes_t avail, commitres;
snd_pcm_uframes_t offset, frames;
char *WritePtr;
int err;
SetRTPriority();
update_size = Device->UpdateSize;
num_updates = Device->NumUpdates;
while(!data->killNow)
{
int state = verify_state(data->pcmHandle);
if(state < 0)
{
ERR("Invalid state detected: %s\n", snd_strerror(state));
aluHandleDisconnect(Device);
break;
}
avail = snd_pcm_avail_update(data->pcmHandle);
if(avail < 0)
{
ERR("available update failed: %s\n", snd_strerror(avail));
continue;
}
if((snd_pcm_uframes_t)avail > update_size*(num_updates+1))
{
WARN("available samples exceeds the buffer size\n");
snd_pcm_reset(data->pcmHandle);
continue;
}
// make sure there's frames to process
if((snd_pcm_uframes_t)avail < update_size)
{
if(state != SND_PCM_STATE_RUNNING)
{
err = snd_pcm_start(data->pcmHandle);
if(err < 0)
{
ERR("start failed: %s\n", snd_strerror(err));
continue;
}
}
if(snd_pcm_wait(data->pcmHandle, 1000) == 0)
ERR("Wait timeout... buffer size too low?\n");
continue;
}
avail -= avail%update_size;
// it is possible that contiguous areas are smaller, thus we use a loop
while(avail > 0)
{
frames = avail;
err = snd_pcm_mmap_begin(data->pcmHandle, &areas, &offset, &frames);
if(err < 0)
{
ERR("mmap begin error: %s\n", snd_strerror(err));
break;
}
WritePtr = (char*)areas->addr + (offset * areas->step / 8);
aluMixData(Device, WritePtr, frames);
commitres = snd_pcm_mmap_commit(data->pcmHandle, offset, frames);
if(commitres < 0 || (commitres-frames) != 0)
{
ERR("mmap commit error: %s\n",
snd_strerror(commitres >= 0 ? -EPIPE : commitres));
break;
}
avail -= frames;
}
}
return 0;
}
int main()
{
const snd_pcm_channel_area_t *areas;
int size;
unsigned char *buffer;
char *pcm_name;
unsigned int rate = 44100;
int chan;
int rc;
unsigned int val;
char check;
int pcmreturn;
//Set PCM stream and handle
snd_pcm_t *pcm_handle;
snd_pcm_stream_t stream = SND_PCM_STREAM_PLAYBACK;
//Set HARDWARE parameters
snd_pcm_hw_params_t *hwparams;
//pcm_name = (char *)malloc(10);
pcm_name = "plughw:0,0";
//allocate memory for hardware
if(snd_pcm_hw_params_malloc(&hwparams)<0)
{
fprintf(stderr,"No memory allocated for hardware");
return(-1);
}
if (snd_pcm_open(&pcm_handle, pcm_name, stream, 0) < 0) {
fprintf(stderr, "Error opening PCM device %s\n", pcm_name);
return(-1);
}
//INITIALIZE HARDWARE WITH CONFIGURATION OF THE SOUNDCARD
if(snd_pcm_hw_params_any(pcm_handle,hwparams)<0)
{
fprintf(stderr,"The hardware device cannot be configured\n");
}
//SET FORMAT TO 16 BIT LITTLE ENDIAN
snd_pcm_hw_params_set_format(pcm_handle,hwparams,SND_PCM_FORMAT_S16_LE);
/* Two channels (stereo) */
snd_pcm_hw_params_set_channels(pcm_handle,hwparams,2);
/* 44100 bits/second sampling rate (CD quality) */
if (snd_pcm_hw_params_set_access(pcm_handle, hwparams, SND_PCM_ACCESS_MMAP_INTERLEAVED) < 0) {
fprintf(stderr, "Error setting access.\n");
return(-1);
}
//SETTING RATE ie SAMPLING FREQUENCY
snd_pcm_hw_params_set_rate_near(pcm_handle, hwparams, &rate, 0);
//SETTING HARDWARE PARAMETERS
if(rc=(snd_pcm_hw_params(pcm_handle,hwparams))<0)
{
fprintf(stderr,"\nCannot set hardware parameters\n");
return -1;
}
//snd_pcm_uframes_t periodsize = 8192;
snd_pcm_uframes_t frames,offset ;//OF TYPE UNSIGNED LONG
snd_pcm_sframes_t commitres;
frames =32;
//SETTING SOME MORE PARAMETERS
size = frames*4;
//SETTING BUFFER SIZE
/*if (snd_pcm_hw_params_set_buffer_size(pcm_handle, hwparams, (periodsize*2)>>2) < 0) {
fprintf(stderr, "Error setting buffersize.\n");
return(-1);
}
*/
int first=0;;
int err;
snd_pcm_sframes_t avail = snd_pcm_avail_update(pcm_handle);
printf("\nNumber of frames available is : %d \n",(int)avail);
//-------------------------------------------------------------------------------------------------------
//<<<<<<<<<<<<<<<<<<<<<<DISPLAYING INFORMATION>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>
//Buffer size
snd_pcm_hw_params_get_buffer_size(hwparams, (snd_pcm_uframes_t*)&val);
printf("\nThe buffer size is %d \n",val);
//Buffer time
snd_pcm_hw_params_get_buffer_time(hwparams, &val,0);
printf("\nBuffer time is : %d \n",val);
//Period size
snd_pcm_hw_params_get_period_size(hwparams,&frames,0);
printf("\nperiod size : %d \n",(int)frames);
//Periods between buffers
err=snd_pcm_mmap_begin(pcm_handle,&areas,&offset,&frames);
//Periods between buffer
snd_pcm_hw_params_get_periods(hwparams,&val,0);
printf("\n Periods between buffer is : %d \n",val);
//<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>.
if(err<0)
{
printf("\nMMAP error\n");
return -1;
}
else printf("\n%d\n",err);
commitres = snd_pcm_mmap_commit(pcm_handle,offset,frames);
if(commitres<0)
{
printf("\nFrames not committed to memory\n");
}
int dest = open("sample3.wav",O_RDONLY);
if(dest<0)
{
perror("\nFile could not be opened\n");
return -1;
}
//int *c = offset;
buffer = (unsigned char *)malloc(1000);
unsigned long buf = offset;
if(read(dest,&offset,1)<0)
{
perror("\nNo destination for read\n");
return -1;
}
struct timeval tvbefore,tvafter;
gettimeofday(&tvbefore,NULL);
while(read(dest,buffer,100)!=0);
gettimeofday(&tvafter,NULL);
printf("\nTime taken by read() is %09ld \n",tvafter.tv_usec-tvbefore.tv_usec);
/*
while(1)
{
if(read(dest,&offset,80)!=0)
{
//fread(buffer,sizeof(buffer),160,f1);
{
if(pcmreturn = snd_pcm_mmap_writei(pcm_handle,&offset,80)<0)
{
snd_pcm_prepare(pcm_handle);
printf("\n<<<<<<<Buffer Underrun>>>>>>>>\n");
break;
}
}
}
else break;
}
*/
}
static HRESULT WINAPI IDsDriverBufferImpl_Unlock(PIDSDRIVERBUFFER iface,
LPVOID pvAudio1,DWORD dwLen1,
LPVOID pvAudio2,DWORD dwLen2)
{
IDsDriverBufferImpl *This = (IDsDriverBufferImpl *)iface;
snd_pcm_uframes_t writepos;
if (!dwLen1)
return DS_OK;
/* **** */
EnterCriticalSection(&This->pcm_crst);
writepos = snd_pcm_bytes_to_frames(This->pcm, (DWORD_PTR)pvAudio1 - (DWORD_PTR)This->mmap_buffer);
if (writepos == This->mmap_pos)
{
const snd_pcm_channel_area_t *areas;
snd_pcm_uframes_t writelen = snd_pcm_bytes_to_frames(This->pcm, dwLen1);
TRACE("Committing data\n");
if (This->mmap)
This->mmap_pos += snd_pcm_mmap_commit(This->pcm, This->mmap_pos, writelen);
else
{
int ret;
ret = snd_pcm_writei(This->pcm, pvAudio1, writelen);
if (ret == -EPIPE)
{
WARN("Underrun occurred\n");
wine_snd_pcm_recover(This->pcm, -EPIPE, 1);
ret = snd_pcm_writei(This->pcm, pvAudio1, writelen);
/* Advance mmap pointer a little to make dsound notice the underrun and respond to it */
if (ret < writelen) WARN("Short write %ld/%d\n", writelen, ret);
This->mmap_pos += This->mmap_commitahead + ret;
This->mmap_pos %= This->mmap_buflen_frames;
}
else if (ret > 0)
This->mmap_pos += ret;
if (ret < 0)
WARN("Committing data: %d / %s (%p %ld)\n", ret, snd_strerror(ret), pvAudio1, writelen);
}
if (This->mmap_pos == This->mmap_buflen_frames)
This->mmap_pos = 0;
if (dwLen2)
{
writelen = snd_pcm_bytes_to_frames(This->pcm, dwLen2);
if (This->mmap)
{
snd_pcm_mmap_begin(This->pcm, &areas, &This->mmap_pos, &writelen);
This->mmap_pos += snd_pcm_mmap_commit(This->pcm, This->mmap_pos, writelen);
}
else
{
int ret;
ret = snd_pcm_writei(This->pcm, pvAudio2, writelen);
if (ret < writelen) WARN("Short write %ld/%d\n", writelen, ret);
This->mmap_pos = ret > 0 ? ret : 0;
}
assert(This->mmap_pos < This->mmap_buflen_frames);
}
}
LeaveCriticalSection(&This->pcm_crst);
/* **** */
return DS_OK;
}
int main()
{
char *filename = "44k.wav";
SF_INFO sfinfo;
SNDFILE *f;
f = sf_open(filename,SFM_READ, &sfinfo);
printf("\nCHECK RATE %d \n",sfinfo.samplerate);
printf("\nCHECK CHANNELS %d \n",sfinfo.channels);
printf("\nNumber of frames %ld \n",sfinfo.frames);
int j;
snd_pcm_t *pcm_handle;
char *pcm_name;
unsigned int err;
//pcm_name = "default";
pcm_name = "plughw:0,0";
snd_pcm_hw_params_t *hwparams;
unsigned int rate = sfinfo.samplerate;
unsigned int channels = sfinfo.channels;
unsigned int exact_rate;
snd_pcm_uframes_t frames, offset;
snd_pcm_sframes_t commitres, avail,size=170;
const snd_pcm_channel_area_t *areas;
unsigned char *ptr[2];
snd_pcm_format_t stream = SND_PCM_FORMAT_S16_LE;
err=snd_pcm_open(&pcm_handle,pcm_name,SND_PCM_STREAM_PLAYBACK,0);
if(err<0)
{
perror("\nCannot open PCM device\n");
exit(0);
}
if(snd_pcm_hw_params_malloc(&hwparams)<0)
{
perror("\nMemory cannot be allocated\n");
exit(0);
}
if(snd_pcm_hw_params_any(pcm_handle,hwparams)<0)
{
perror("\nUnable to set any HW configuration to device\n");
exit(0);
}
exact_rate = rate;
if(snd_pcm_hw_params_set_rate_near(pcm_handle, hwparams, &exact_rate, 0)<0)
{
printf("\nUnable to set rate %u instead rate used is %u \n",rate,exact_rate);
}
rate = exact_rate;
printf("\nExact rate is %u \n",rate);
if(snd_pcm_hw_params_set_channels(pcm_handle, hwparams, channels),0)
{
perror("\nUnable to set channels\n");
exit(0);
}
if(snd_pcm_hw_params_set_format(pcm_handle, hwparams, stream)<0)
{
perror("\nUnable to set format\n");
exit(0);
}
if(snd_pcm_hw_params_set_access(pcm_handle, hwparams, SND_PCM_ACCESS_MMAP_INTERLEAVED)<0)
{
perror("\nUnable to set access\n");
exit(0);
}
snd_pcm_sframes_t period_size;
snd_pcm_hw_params_get_period_size(hwparams, &period_size,0);
printf("\nPeriod size is %ld \n",period_size);
err = snd_pcm_hw_params(pcm_handle,hwparams);
if(err<0)
{
perror("\nHW params cannot be set\n");
exit(0);
}
snd_pcm_hw_params_get_period_size(hwparams,&period_size,0);
printf("\nObtained Period size = %ld \n",period_size);
size = period_size;
snd_pcm_hw_params_get_buffer_size(hwparams,&frames);
printf("\nObtained buffer size is %ld \n",frames);
int ret = open(filename,O_RDONLY);
if(ret<0)
{
perror("\nFile cannot be opened\n");
exit(0);
}
int k=0;
int i;
while(1)
{
k++;
if(k==2)
{
err = snd_pcm_start(pcm_handle);
if(err<0)
{
perror("\nError starting PCM device\n");
exit(1);
}
}
avail = snd_pcm_avail_update(pcm_handle);
if(avail<frames)
{
err = snd_pcm_prepare(pcm_handle);
if(err<0)
{
perror("\nNo frames available\n");
exit(0);
}
}
// printf("\nFrames available %ld\n",avail);
size=period_size;
while(size>0)
{
frames = size;
err = snd_pcm_mmap_begin(pcm_handle, &areas, &offset, &frames);
if(err<0)
{
perror("\nMMAP cannot assign areas\n");
exit(0);
}
for(i=0;i<1;i++)
{
ptr[i] = (unsigned char *)areas[i].addr + areas[i].first/8 + offset*(areas[i].step/8) ;
// printf("\nCheck\n");
if(ptr[i]==NULL)
{
perror("\nPointer cannot point to memory\n");
exit(0);
}
}
for(i=0;i<1;i++)
if(read(ret, ptr[i], frames*4)>0)
{
}
else
{
perror("\nFile cannot be opened\n");
exit(0);
}
commitres = snd_pcm_mmap_commit(pcm_handle, offset, frames);
if(commitres<0)
{
err = snd_pcm_prepare(pcm_handle);
if(err<0)
{
perror("\nFrames cannot be committed\n");
exit(0);
}
}
else size-=frames;
snd_pcm_wait(pcm_handle,1000);
}//END OF "while(size>0)" LOOP
}//END OF OUTER WHILE LOOP
}
int main(int argc, char *argv[])
{
int err;
struct sniffer_state sts;
sts.pcm_name = strdup("plughw:0,0");
sts.stream = SND_PCM_STREAM_PLAYBACK;
sts.format = SND_PCM_FORMAT_A_LAW;
sts.rate = 8000;
// sts.exact_rate;
sts.periods = 2;
sts.buffer_time = 25000;
sts.period_time = 12500;
snd_pcm_hw_params_alloca(&sts.hwparams);
if (snd_pcm_open(&sts.pcm, sts.pcm_name, sts.stream, 0) < 0) {
fprintf(stderr, "Error opening PCM device %s\n", sts.pcm_name);
return(-1);
}
if (snd_pcm_hw_params_any(sts.pcm, sts.hwparams) < 0) {
fprintf(stderr, "Can not configure this PCM device.\n");
return(-1);
}
if (snd_pcm_hw_params_set_access(sts.pcm, sts.hwparams,
SND_PCM_ACCESS_MMAP_NONINTERLEAVED) < 0) {
fprintf(stderr, "Error setting access.\n");
return(-1);
}
if (snd_pcm_hw_params_set_format(sts.pcm, sts.hwparams,
sts.format) < 0) {
fprintf(stderr, "Error setting format.\n");
return(-1);
}
sts.exact_rate = sts.rate;
if (snd_pcm_hw_params_set_rate_near(sts.pcm, sts.hwparams,
&sts.exact_rate, 0) < 0) {
fprintf(stderr, "Error setting rate.\n");
return(-1);
}
printf("rate: %d\n", sts.exact_rate);
if (sts.rate != sts.exact_rate) {
fprintf(stderr, "The rate %d Hz is not supported by your hardware.\n"
"==> Using %d Hz instead.\n", sts.rate, sts.exact_rate);
}
if (snd_pcm_hw_params_set_channels(sts.pcm, sts.hwparams, 1) < 0) {
fprintf(stderr, "Error setting channels.\n");
return(-1);
}
if (snd_pcm_hw_params_set_periods(sts.pcm, sts.hwparams, sts.periods, 0) < 0) {
fprintf(stderr, "Error setting periods.\n");
return(-1);
}
if (snd_pcm_hw_params_set_buffer_time_near(sts.pcm, sts.hwparams,
&sts.buffer_time, &sts.dir) < 0) {
fprintf(stderr, "Error setting buffersize.\n");
return(-1);
}
printf("buffer_time set to %d\n", sts.buffer_time);
err = snd_pcm_hw_params_get_period_size(sts.hwparams, &sts.period_size, &sts.dir);
if (err < 0) {
printf("Unable to get period size for playback: %s\n", snd_strerror(err));
return err;
}
printf("period_size = %d\n", (int)sts.period_size);
if (snd_pcm_hw_params(sts.pcm, sts.hwparams) < 0) {
fprintf(stderr, "Error setting HW params.\n");
return(-1);
}
setvbuf(stdout, (char *)NULL, _IONBF, 0);
int router_control_fd = open("/dev/visdn/router-control", O_RDWR);
if (router_control_fd < 0) {
perror("Unable to open router-control");
return 1;
}
int fd;
fd = open("/dev/visdn/streamport", O_RDWR);
if (fd < 0) {
perror("cannot open /dev/visdn/streamport");
return 1;
}
struct vsp_ctl vsp_ctl;
if (ioctl(fd, VISDN_SP_GET_NODEID, (caddr_t)&vsp_ctl) < 0) {
perror("ioctl(VISDN_SP_GET_NODEID)");
return 1;
}
char node_id[80];
snprintf(node_id, sizeof(node_id), "/sys/%s", vsp_ctl.node_id);
struct visdn_connect vc;
memset(&vc, 0, sizeof(vc));
strncpy(vc.from_endpoint, argv[1],
sizeof(vc.from_endpoint));
strncpy(vc.to_endpoint, node_id,
sizeof(vc.to_endpoint));
printf("Connect: %s => %s\n", vc.from_endpoint, vc.to_endpoint);
if (ioctl(router_control_fd, VISDN_IOC_CONNECT, (caddr_t) &vc) < 0) {
perror("ioctl(VISDN_CONNECT, br=>sp)");
return 1;
}
int pipeline_id = vc.pipeline_id;
memset(&vc, 0, sizeof(vc));
vc.pipeline_id = pipeline_id;
if (ioctl(router_control_fd, VISDN_IOC_PIPELINE_OPEN,
(caddr_t)&vc) < 0) {
perror("ioctl(VISDN_PIPELINE_OPEN, br=>sp)");
return 1;
}
memset(&vc, 0, sizeof(vc));
vc.pipeline_id = pipeline_id;
if (ioctl(router_control_fd, VISDN_IOC_PIPELINE_START,
(caddr_t)&vc) < 0) {
perror("ioctl(VISDN_PIPELINE_START, br=>sp)");
return 1;
}
//double phase = 0;
const snd_pcm_channel_area_t *my_areas;
snd_pcm_uframes_t offset, frames, size;
snd_pcm_sframes_t avail, commitres;
snd_pcm_state_t state;
int first = 1;
while (1) {
state = snd_pcm_state(sts.pcm);
if (state == SND_PCM_STATE_XRUN) {
err = xrun_recovery(sts.pcm, -EPIPE);
if (err < 0) {
printf("XRUN recovery failed: %s\n", snd_strerror(err));
return err;
}
first = 1;
} else if (state == SND_PCM_STATE_SUSPENDED) {
err = xrun_recovery(sts.pcm, -ESTRPIPE);
if (err < 0) {
printf("SUSPEND recovery failed: %s\n", snd_strerror(err));
return err;
}
}
avail = snd_pcm_avail_update(sts.pcm);
if (avail < 0) {
err = xrun_recovery(sts.pcm, avail);
if (err < 0) {
printf("avail update failed: %s\n", snd_strerror(err));
return err;
}
first = 1;
continue;
}
if (avail < sts.period_size) {
if (first) {
first = 0;
err = snd_pcm_start(sts.pcm);
if (err < 0) {
printf("Start error: %s\n", snd_strerror(err));
exit(EXIT_FAILURE);
}
} else {
err = snd_pcm_wait(sts.pcm, -1);
if (err < 0) {
if ((err = xrun_recovery(sts.pcm, err)) < 0) {
printf("snd_pcm_wait error: %s\n", snd_strerror(err));
exit(EXIT_FAILURE);
}
first = 1;
}
}
continue;
}
size = sts.period_size;
while (size > 0) {
frames = size;
err = snd_pcm_mmap_begin(sts.pcm, &my_areas, &offset, &frames);
if (err < 0) {
if ((err = xrun_recovery(sts.pcm, err)) < 0) {
printf("MMAP begin avail error: %s\n", snd_strerror(err));
exit(EXIT_FAILURE);
}
first = 1;
}
int r = read(fd, my_areas[0].addr + offset, frames);
printf("%d %d %d: ", (int)offset, (int)frames, r);
int i;
for (i=0; i<r; i++)
printf("%02x", *(__u8 *)(my_areas[0].addr + i));
printf("\n");
commitres = snd_pcm_mmap_commit(sts.pcm, offset, frames);
if (commitres < 0 || (snd_pcm_uframes_t)commitres != frames) {
if ((err = xrun_recovery(sts.pcm, commitres >= 0 ? -EPIPE : commitres)) < 0) {
printf("MMAP commit error: %s\n", snd_strerror(err));
exit(EXIT_FAILURE);
}
first = 1;
}
size -= frames;
}
}
return 0;
}
/**
* Allocate the memory-mapped buffer for direct sound, and set up the
* callback.
*/
static int DSDB_CreateMMAP(IDsDriverBufferImpl* pdbi)
{
snd_pcm_t *pcm = pdbi->pcm;
snd_pcm_format_t format;
snd_pcm_uframes_t frames, ofs, avail, psize, boundary;
unsigned int channels, bits_per_sample, bits_per_frame;
int err, mmap_mode;
const snd_pcm_channel_area_t *areas;
snd_pcm_hw_params_t *hw_params = pdbi->hw_params;
snd_pcm_sw_params_t *sw_params = pdbi->sw_params;
void *buf;
mmap_mode = snd_pcm_type(pcm);
if (mmap_mode == SND_PCM_TYPE_HW)
TRACE("mmap'd buffer is a direct hardware buffer.\n");
else if (mmap_mode == SND_PCM_TYPE_DMIX)
TRACE("mmap'd buffer is an ALSA dmix buffer\n");
else
TRACE("mmap'd buffer is an ALSA type %d buffer\n", mmap_mode);
err = snd_pcm_hw_params_get_period_size(hw_params, &psize, NULL);
err = snd_pcm_hw_params_get_format(hw_params, &format);
err = snd_pcm_hw_params_get_buffer_size(hw_params, &frames);
err = snd_pcm_hw_params_get_channels(hw_params, &channels);
bits_per_sample = snd_pcm_format_physical_width(format);
bits_per_frame = bits_per_sample * channels;
if (TRACE_ON(dsalsa))
ALSA_TraceParameters(hw_params, NULL, FALSE);
TRACE("format=%s frames=%ld channels=%d bits_per_sample=%d bits_per_frame=%d\n",
snd_pcm_format_name(format), frames, channels, bits_per_sample, bits_per_frame);
pdbi->mmap_buflen_frames = frames;
pdbi->mmap_buflen_bytes = snd_pcm_frames_to_bytes( pcm, frames );
snd_pcm_sw_params_current(pcm, sw_params);
snd_pcm_sw_params_set_start_threshold(pcm, sw_params, 0);
snd_pcm_sw_params_get_boundary(sw_params, &boundary);
snd_pcm_sw_params_set_stop_threshold(pcm, sw_params, boundary);
snd_pcm_sw_params_set_silence_threshold(pcm, sw_params, boundary);
snd_pcm_sw_params_set_silence_size(pcm, sw_params, 0);
snd_pcm_sw_params_set_avail_min(pcm, sw_params, 0);
err = snd_pcm_sw_params(pcm, sw_params);
avail = snd_pcm_avail_update(pcm);
if ((snd_pcm_sframes_t)avail < 0)
{
ERR("No buffer is available: %s.\n", snd_strerror(avail));
return DSERR_GENERIC;
}
if (!pdbi->mmap)
{
buf = pdbi->mmap_buffer = HeapAlloc(GetProcessHeap(), 0, pdbi->mmap_buflen_bytes);
if (!buf)
return DSERR_OUTOFMEMORY;
snd_pcm_format_set_silence(format, buf, pdbi->mmap_buflen_frames);
pdbi->mmap_pos = 0;
}
else
{
err = snd_pcm_mmap_begin(pcm, &areas, &ofs, &avail);
if ( err < 0 )
{
ERR("Can't map sound device for direct access: %s/%d\n", snd_strerror(err), err);
return DSERR_GENERIC;
}
snd_pcm_format_set_silence(format, areas->addr, pdbi->mmap_buflen_frames);
pdbi->mmap_pos = ofs + snd_pcm_mmap_commit(pcm, ofs, 0);
pdbi->mmap_buffer = areas->addr;
}
TRACE("created mmap buffer of %ld frames (%d bytes) at %p\n",
frames, pdbi->mmap_buflen_bytes, pdbi->mmap_buffer);
return DS_OK;
}
int main()
{
const snd_pcm_channel_area_t *areas;
int size;
unsigned char *buffer;
char *pcm_name;
unsigned int rate = 8000;
int chan;
int rc;
unsigned int val;
char check;
int pcmreturn;
//Set PCM stream and handle
snd_pcm_t *pcm_handle;
snd_pcm_stream_t stream = SND_PCM_STREAM_PLAYBACK;
//Set HARDWARE parameters
snd_pcm_hw_params_t *hwparams;
//pcm_name = (char *)malloc(10);
pcm_name = "plughw:0,0";
//allocate memory for hardware
if(snd_pcm_hw_params_malloc(&hwparams)<0)
{
fprintf(stderr,"No memory allocated for hardware");
return(-1);
}
if (snd_pcm_open(&pcm_handle, pcm_name, stream, 0) < 0) {
fprintf(stderr, "Error opening PCM device %s\n", pcm_name);
return(-1);
}
//INITIALIZE HARDWARE WITH CONFIGURATION OF THE SOUNDCARD
if(snd_pcm_hw_params_any(pcm_handle,hwparams)<0)
{
fprintf(stderr,"The hardware device cannot be configured\n");
}
//SET FORMAT TO 16 BIT LITTLE ENDIAN
snd_pcm_hw_params_set_format(pcm_handle,hwparams,SND_PCM_FORMAT_S16_LE);
/* Two channels (stereo) */
snd_pcm_hw_params_set_channels(pcm_handle,hwparams,2);
/* 44100 bits/second sampling rate (CD quality) */
if (snd_pcm_hw_params_set_access(pcm_handle, hwparams, SND_PCM_ACCESS_MMAP_INTERLEAVED) < 0) {
fprintf(stderr, "Error setting access.\n");
return(-1);
}
//SETTING RATE ie SAMPLING FREQUENCY
snd_pcm_hw_params_set_rate_near(pcm_handle, hwparams, &rate, 0);
//SETTING HARDWARE PARAMETERS
if(rc=(snd_pcm_hw_params(pcm_handle,hwparams))<0)
{
fprintf(stderr,"\nCannot set hardware parameters\n");
return -1;
}
//snd_pcm_uframes_t periodsize = 8192;
snd_pcm_uframes_t frames,offset ;//OF TYPE UNSIGNED LONG
snd_pcm_sframes_t commitres;
//frames =32;
//SETTING SOME MORE PARAMETERS
//size = frames*4;
//SETTING BUFFER SIZE
/*if (snd_pcm_hw_params_set_buffer_size(pcm_handle, hwparams, (periodsize*2)>>2) < 0) {
fprintf(stderr, "Error setting buffersize.\n");
return(-1);
}
*/
int first=0;;
int err;
snd_pcm_sframes_t avail = snd_pcm_avail_update(pcm_handle);
printf("\nNumber of frames available is : %d \n",(int)avail);
//-------------------------------------------------------------------------------------------------------
//<<<<<<<<<<<<<<<<<<<<<<DISPLAYING INFORMATION>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>
//Buffer size
snd_pcm_hw_params_get_buffer_size(hwparams, (snd_pcm_uframes_t*)&val);
printf("\nThe buffer size is %d \n",val);
//Buffer time
snd_pcm_hw_params_get_buffer_time(hwparams, &val,0);
printf("\nBuffer time is : %d \n",val);
//Period size
snd_pcm_hw_params_get_period_size(hwparams,&frames,0);
printf("\nperiod size : %d \n",(int)frames);
////////////////////////////////////////////////////////////////
///////////////////////////////////////////////////////////////
//<<<<<<<<<<<<<mmap_begin>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>
err=snd_pcm_mmap_begin(pcm_handle,&areas,&offset,&frames);
//Periods between buffer
snd_pcm_hw_params_get_periods(hwparams,&val,0);
printf("\n Periods between buffer is : %d \n",val);
//<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>.
if(err<0)
{
printf("\nMMAP error\n");
return -1;
}
else printf("\n%d\n",err);
/*
commitres = snd_pcm_mmap_commit(pcm_handle,offset,frames);
if(commitres<0)
{
printf("\nFrames not committed to memory\n");
}
*/
//<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<< >>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>
//<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<,OPENING FILE>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>....
int dest = open("sample3.wav",O_RDONLY);
if(dest<0)
{
perror("\nFile could not be opened\n");
return -1;
}
//buffer = (unsigned char *)malloc(1000);
/*
unsigned long buf = offset;
if(read(dest,&offset,1)<0)
{
perror("\nNo destination for read\n");
return -1;
}
*/
/*
avail=snd_pcm_avail_update(pcm_handle);
printf("\nAvailable frames = %d \n\n",(int)avail);
struct timeval tvbefore,tvafter;
gettimeofday(&tvbefore,NULL);
*/
unsigned char *ptr[2];
int i;
//unsigned int steps=0;
for(i=0;i<2;i++)
ptr[i] = (unsigned char*)areas[i].addr + (areas[i].first/8) + offset*(areas[i].step/8);
printf("\nOffset of the first sample : %u \n",areas[0].first);
printf("\n\nOffset of the memory map is : %u \n",areas[0].step/8);
printf("\nAreas start address is : %u \n",areas[0].addr);
printf("\nNumber of frames ; %u \n",frames);
printf("\n\nPointer before ; %u \n",ptr[0]);
long pl;
for(pl=0;pl<100000;pl++);
if(ptr[1]==NULL)
printf("\nNull pointer 1 allocated\n");
if(ptr[0]==NULL)
printf("\nNull pointer 0 allocated \n");
int check2=1;
snd_pcm_sframes_t size2 =30;
while(1)
{
for(i=0;i<2;i++)
{
//ptr[i] = (unsigned char*)areas[i].addr + (areas[i].first/8) + offset*(areas[i].step/8);
if(read(dest,ptr[i],120)!=0)
{
if(ptr[i]!=NULL)
{
if(pcmreturn = snd_pcm_mmap_writei(pcm_handle,ptr[i],size2)<0)
{
snd_pcm_prepare(pcm_handle);
printf("\n<<<<<<<Buffer Underrun>>>>>>>>\n");
break;
}
// printf("\n%d\n",pcmreturn);
ptr[i]+=0;
printf("\n%lu\n",ptr[i]);
}
}
else {
check2=0;
break;
}
}
if(check2==0)
break;
// l:break;
}
commitres = snd_pcm_mmap_commit(pcm_handle,offset,frames);
if(commitres<0)
{
printf("\nFrames not committed to memory\n");
}
}
static void async_direct_callback(snd_async_handler_t *ahandler)
{
snd_pcm_t *handle = snd_async_handler_get_pcm(ahandler);
struct sniffer_state *sns = snd_async_handler_get_callback_private(ahandler);
const snd_pcm_channel_area_t *my_areas;
snd_pcm_uframes_t offset, frames, size;
snd_pcm_sframes_t avail, commitres;
snd_pcm_state_t state;
int first = 0, err;
while (1) {
state = snd_pcm_state(handle);
if (state == SND_PCM_STATE_XRUN) {
err = xrun_recovery(handle, -EPIPE);
if (err < 0) {
printf("XRUN recovery failed: %s\n", snd_strerror(err));
exit(EXIT_FAILURE);
}
first = 1;
} else if (state == SND_PCM_STATE_SUSPENDED) {
err = xrun_recovery(handle, -ESTRPIPE);
if (err < 0) {
printf("SUSPEND recovery failed: %s\n", snd_strerror(err));
exit(EXIT_FAILURE);
}
}
avail = snd_pcm_avail_update(handle);
if (avail < 0) {
err = xrun_recovery(handle, avail);
if (err < 0) {
printf("avail update failed: %s\n", snd_strerror(err));
exit(EXIT_FAILURE);
}
first = 1;
continue;
}
if (avail < sns->period_size) {
if (first) {
first = 0;
err = snd_pcm_start(handle);
if (err < 0) {
printf("Start error: %s\n", snd_strerror(err));
exit(EXIT_FAILURE);
}
} else {
break;
}
continue;
}
size = sns->period_size;
while (size > 0) {
frames = size;
err = snd_pcm_mmap_begin(handle, &my_areas, &offset, &frames);
if (err < 0) {
if ((err = xrun_recovery(handle, err)) < 0) {
printf("MMAP begin avail error: %s\n", snd_strerror(err));
exit(EXIT_FAILURE);
}
first = 1;
}
printf("Callback %d %d\n", (int)offset, (int)frames);
int i;
for(i=0; i<frames; i++)
*(__u8 *)(my_areas[0].addr + offset + i)=i%64;
//generate_sine(my_areas, offset, frames, &sns->phase);
commitres = snd_pcm_mmap_commit(handle, offset, frames);
if (commitres < 0 || (snd_pcm_uframes_t)commitres != frames) {
if ((err = xrun_recovery(handle, commitres >= 0 ? -EPIPE : commitres)) < 0) {
printf("MMAP commit error: %s\n", snd_strerror(err));
exit(EXIT_FAILURE);
}
first = 1;
}
size -= frames;
}
}
}
void AudioDriver_ALSA::async_direct_callback(snd_async_handler_t *ahandler)
{
snd_pcm_t *handle = snd_async_handler_get_pcm(ahandler);
AudioDriver_ALSA* audioDriver = (AudioDriver_ALSA*) snd_async_handler_get_callback_private(ahandler);
const snd_pcm_channel_area_t *my_areas;
snd_pcm_uframes_t offset, frames, size;
snd_pcm_sframes_t avail, commitres;
snd_pcm_state_t state;
int first = 0, err;
while (1) {
state = snd_pcm_state(handle);
if (state == SND_PCM_STATE_XRUN) {
err = snd_pcm_recover(handle, -EPIPE, 0);
if (err < 0) {
fprintf(stderr, "ALSA: XRUN recovery failed: %s\n", snd_strerror(err));
}
first = 1;
} else if (state == SND_PCM_STATE_SUSPENDED) {
err = snd_pcm_recover(handle, ESTRPIPE, 0);
if (err < 0) {
fprintf(stderr, "ALSA: SUSPEND recovery failed: %s\n", snd_strerror(err));
}
}
avail = snd_pcm_avail_update(handle);
if (avail < 0) {
err = snd_pcm_recover(handle, avail, 0);
if (err < 0) {
fprintf(stderr, "ALSA: avail update failed: %s\n", snd_strerror(err));
}
first = 1;
continue;
}
if (avail < audioDriver->period_size) {
if (first) {
first = 0;
err = snd_pcm_start(handle);
if (err < 0) {
fprintf(stderr, "ALSA: Start error: %s\n", snd_strerror(err));
}
} else {
break;
}
continue;
}
frames = audioDriver->period_size;
err = snd_pcm_mmap_begin(handle, &my_areas, &offset, &frames);
if (err < 0) {
if ((err = snd_pcm_recover(handle, err, 0)) < 0) {
fprintf(stderr, "ALSA: MMAP begin avail error: %s\n", snd_strerror(err));
}
first = 1;
}
if(frames != audioDriver->period_size)
fprintf(stderr, "ALSA: Invalid buffer size: %lu (should be %lu), skipping..\n", frames, audioDriver->period_size);
// Certain audio drivers will periodically request buffers of less than one period when
// soft-resampling (ie, not running at native frequency). Milkytracker can't handle this,
// and bad things happen - so best to warn the user and not process.
// PS - I've disabled soft-resampling for now (see below) so this shouldn't happen.
// PPS - The downside is that if the user has the wrong mixer rate, they will get an error
// dialog - hopefully they'll read the message on stderr...
else
audioDriver->fillAudioWithCompensation(static_cast<char*> (my_areas->addr) + offset*4, frames * 2);
commitres = snd_pcm_mmap_commit(handle, offset, frames);
if (commitres < 0 || (snd_pcm_uframes_t)commitres != frames) {
if ((err = snd_pcm_recover(handle, commitres >= 0 ? -EPIPE : commitres, 0)) < 0) {
fprintf(stderr, "ALSA: MMAP commit error: %s\n", snd_strerror(err));
// What now?
// exit(1);
}
first = 1;
}
}
}
void *CallbackThread( void *userData )
{
PaAlsaStream *stream = (PaAlsaStream*)userData;
pthread_cleanup_push( &Stop, stream ); // Execute Stop on exit
if( stream->pcm_playback )
snd_pcm_start( stream->pcm_playback );
else if( stream->pcm_capture )
snd_pcm_start( stream->pcm_capture );
while(1)
{
int frames_avail;
int frames_got;
PaStreamCallbackTimeInfo timeInfo = {0,0,0}; /* IMPLEMENT ME */
int callbackResult;
int framesProcessed;
pthread_testcancel();
{
/* calculate time info */
snd_timestamp_t capture_timestamp;
snd_timestamp_t playback_timestamp;
snd_pcm_status_t *capture_status;
snd_pcm_status_t *playback_status;
snd_pcm_status_alloca( &capture_status );
snd_pcm_status_alloca( &playback_status );
if( stream->pcm_capture )
{
snd_pcm_status( stream->pcm_capture, capture_status );
snd_pcm_status_get_tstamp( capture_status, &capture_timestamp );
}
if( stream->pcm_playback )
{
snd_pcm_status( stream->pcm_playback, playback_status );
snd_pcm_status_get_tstamp( playback_status, &playback_timestamp );
}
/* Hmm, we potentially have both a playback and a capture timestamp.
* Hopefully they are the same... */
if( stream->pcm_capture && stream->pcm_playback )
{
float capture_time = capture_timestamp.tv_sec +
((float)capture_timestamp.tv_usec/1000000);
float playback_time= playback_timestamp.tv_sec +
((float)playback_timestamp.tv_usec/1000000);
if( fabsf(capture_time-playback_time) > 0.01 )
PA_DEBUG(("Capture time and playback time differ by %f\n", fabsf(capture_time-playback_time)));
timeInfo.currentTime = capture_time;
}
else if( stream->pcm_playback )
{
timeInfo.currentTime = playback_timestamp.tv_sec +
((float)playback_timestamp.tv_usec/1000000);
}
else
{
timeInfo.currentTime = capture_timestamp.tv_sec +
((float)capture_timestamp.tv_usec/1000000);
}
if( stream->pcm_capture )
{
snd_pcm_sframes_t capture_delay = snd_pcm_status_get_delay( capture_status );
timeInfo.inputBufferAdcTime = timeInfo.currentTime -
(float)capture_delay / stream->streamRepresentation.streamInfo.sampleRate;
}
if( stream->pcm_playback )
{
snd_pcm_sframes_t playback_delay = snd_pcm_status_get_delay( playback_status );
timeInfo.outputBufferDacTime = timeInfo.currentTime +
(float)playback_delay / stream->streamRepresentation.streamInfo.sampleRate;
}
}
/*
IMPLEMENT ME:
- handle buffer slips
*/
/*
depending on whether the host buffers are interleaved, non-interleaved
or a mixture, you will want to call PaUtil_ProcessInterleavedBuffers(),
PaUtil_ProcessNonInterleavedBuffers() or PaUtil_ProcessBuffers() here.
*/
framesProcessed = frames_avail = wait( stream );
while( frames_avail > 0 )
{
//PA_DEBUG(( "%d frames available\n", frames_avail ));
/* Now we know the soundcard is ready to produce/receive at least
* one period. We just need to get the buffers for the client
* to read/write. */
PaUtil_BeginBufferProcessing( &stream->bufferProcessor, &timeInfo,
0 /* @todo pass underflow/overflow flags when necessary */ );
frames_got = setup_buffers( stream, frames_avail );
PaUtil_BeginCpuLoadMeasurement( &stream->cpuLoadMeasurer );
callbackResult = paContinue;
/* this calls the callback */
framesProcessed = PaUtil_EndBufferProcessing( &stream->bufferProcessor,
&callbackResult );
PaUtil_EndCpuLoadMeasurement( &stream->cpuLoadMeasurer, framesProcessed );
/* inform ALSA how many frames we wrote */
if( stream->pcm_capture )
snd_pcm_mmap_commit( stream->pcm_capture, stream->capture_offset, frames_got );
if( stream->pcm_playback )
snd_pcm_mmap_commit( stream->pcm_playback, stream->playback_offset, frames_got );
if( callbackResult != paContinue )
break;
frames_avail -= frames_got;
}
/*
If you need to byte swap outputBuffer, you can do it here using
routines in pa_byteswappers.h
*/
if( callbackResult != paContinue )
{
stream->callback_finished = 1;
stream->callbackAbort = (callbackResult == paAbort);
pthread_exit( NULL );
}
}
/* This code is unreachable, but important to include regardless because it
* is possibly a macro with a closing brace to match the opening brace in
* pthread_cleanup_push() above. The documentation states that they must
* always occur in pairs. */
pthread_cleanup_pop( 1 );
}
bool
AlsaSource::WriteMmap ()
{
snd_pcm_channel_area_t *areas = NULL;
snd_pcm_uframes_t offset = 0;
snd_pcm_uframes_t frames;
snd_pcm_sframes_t available_samples;
snd_pcm_sframes_t commitres = 0;
guint32 channels = GetChannels ();
int err = 0;
AudioData *data [channels + 1];
if (GetState () != AudioPlaying) {
LOG_ALSA ("AlsaSource::WriteMmap (): trying to write when we're not playing (state: %i)\n", GetState ());
return false;
}
if (!PreparePcm (&available_samples))
return false;
if (GetFlag (AudioEnded)) {
Underflowed ();
return false;
}
LOG_ALSA_EX ("AlsaSource::WriteMmap (): entering play loop, avail: %" G_GINT64_FORMAT ", sample size: %i\n", (gint64) available_samples, (int) period_size);
frames = available_samples;
mutex.Lock ();
if (!initialized)
goto cleanup;
err = snd_pcm_mmap_begin (pcm, (const snd_pcm_channel_area_t** ) &areas, &offset, &frames);
if (err < 0) {
if (!XrunRecovery (err)) {
LOG_AUDIO ("AudioPlayer: could not get mmapped memory: %s\n", snd_strerror (err));
goto cleanup;
}
started = false;
}
LOG_ALSA_EX ("AlsaSource::WriteMmap (): can write %lu frames, avail: %lu\n", frames, available_samples);
for (guint32 channel = 0; channel < channels; channel++) {
data [channel] = (AudioData *) g_malloc (sizeof (AudioData));
// pointer to the first sample to write to
data [channel]->dest = ((gint8 *) areas [channel].addr) + (areas [channel].first / 8) + offset * areas [channel].step / 8;
// distance (in bytes) between samples
data [channel]->distance = areas [channel].step / 8;
}
data [channels] = NULL;
frames = WriteFull (data, frames);
for (guint32 channel = 0; channel < channels; channel++) {
g_free (data [channel]);
}
commitres = snd_pcm_mmap_commit (pcm, offset, frames);
LOG_ALSA_EX ("AlsaSource::WriteMmap (): played %i samples, of %i available samples, result: %i.\n", (int) frames, (int) 0, (int) commitres);
if (commitres < 0 || (snd_pcm_uframes_t) commitres != frames) {
if (!XrunRecovery (commitres >= 0 ? -EPIPE : commitres)) {
LOG_AUDIO ("AudioPlayer: could not commit mmapped memory: %s\n", snd_strerror(err));
commitres = 0; // so that we end up returning false
goto cleanup;
}
started = false;
}
cleanup:
mutex.Unlock ();
return commitres > 0;
}
