static void *pulseaudio_update(ALLEGRO_THREAD *self, void *data)
{
ALLEGRO_VOICE *voice = data;
PULSEAUDIO_VOICE *pv = voice->extra;
while (!al_get_thread_should_stop(self)) {
if (pv->status == PV_PLAYING) {
unsigned int frames = 4096;
if (voice->is_streaming) {
// streaming audio
const void *data = _al_voice_update(voice, &frames);
if (data) {
pa_simple_write(pv->s, data, frames * pv->frame_size, NULL);
}
}
else {
// direct buffer audio
al_lock_mutex(pv->buffer_mutex);
const char *data = pv->buffer;
unsigned int len = frames * pv->frame_size;
pv->buffer += frames * pv->frame_size;
if (pv->buffer > pv->buffer_end) {
len = pv->buffer_end - data;
pv->buffer = voice->attached_stream->spl_data.buffer.ptr;
voice->attached_stream->pos = 0;
if (voice->attached_stream->loop == ALLEGRO_PLAYMODE_ONCE) {
pv->status = PV_STOPPING;
}
}
else {
voice->attached_stream->pos += frames;
}
al_unlock_mutex(pv->buffer_mutex);
pa_simple_write(pv->s, data, len, NULL);
}
}
else if (pv->status == PV_STOPPING) {
pa_simple_flush(pv->s, NULL);
pv->status = PV_STOPPED;
}
else if (pv->status == PV_STOPPED) {
al_rest(0.001);
}
}
return NULL;
}
/* Custom routine which runs in another thread to periodically check if DirectSound
wants more data for a stream */
static void* _dsound_update(ALLEGRO_THREAD *self, void *arg)
{
ALLEGRO_VOICE *voice = (ALLEGRO_VOICE *)arg;
ALLEGRO_DS_DATA *ex_data = (ALLEGRO_DS_DATA*)voice->extra;
const int bytes_per_sample = ex_data->bits_per_sample / 8;
DWORD play_cursor = 0;
DWORD write_cursor;
DWORD saved_play_cursor = 0;
unsigned int samples;
LPVOID ptr1, ptr2;
DWORD block1_bytes, block2_bytes;
unsigned char *data;
HRESULT hr;
(void)self;
unsigned char *silence = (unsigned char *)al_malloc(buffer_size);
int silence_value = _al_kcm_get_silence(voice->depth);
memset(silence, silence_value, buffer_size);
/* Fill buffer */
hr = ex_data->ds8_buffer->Lock(0, buffer_size,
&ptr1, &block1_bytes, &ptr2, &block2_bytes,
DSBLOCK_ENTIREBUFFER);
if (!FAILED(hr)) {
samples = buffer_size / bytes_per_sample / ex_data->channels;
data = (unsigned char *) _al_voice_update(voice, &samples);
memcpy(ptr1, data, block1_bytes);
memcpy(ptr2, data + block1_bytes, block2_bytes);
ex_data->ds8_buffer->Unlock(ptr1, block1_bytes, ptr2, block2_bytes);
}
ex_data->ds8_buffer->Play(0, 0, DSBPLAY_LOOPING);
do {
if (!_dsound_voice_is_playing(voice)) {
ex_data->ds8_buffer->Play(0, 0, DSBPLAY_LOOPING);
}
ex_data->ds8_buffer->GetCurrentPosition(&play_cursor, &write_cursor);
/* We try to fill the gap between the saved_play_cursor and the
* play_cursor.
*/
int d = play_cursor - saved_play_cursor;
if (d < 0)
d += buffer_size;
/* Don't fill small gaps. Let it accumulate to amortise the cost of
* mixing the samples and locking/unlocking the buffer.
*/
if (d < MIN_FILL) {
al_rest(0.005);
continue;
}
/* Don't generate too many samples at once. The buffer may underrun
* while we wait for _al_voice_update to complete.
*/
samples = d / bytes_per_sample / ex_data->channels;
if (samples > MAX_FILL) {
samples = MAX_FILL;
}
/* Generate the samples. */
data = (unsigned char *) _al_voice_update(voice, &samples);
if (data == NULL) {
data = silence;
}
hr = ex_data->ds8_buffer->Lock(saved_play_cursor,
samples * bytes_per_sample * ex_data->channels,
&ptr1, &block1_bytes, &ptr2, &block2_bytes, 0);
if (!FAILED(hr)) {
memcpy(ptr1, data, block1_bytes);
memcpy(ptr2, data + block1_bytes, block2_bytes);
hr = ex_data->ds8_buffer->Unlock(ptr1, block1_bytes,
ptr2, block2_bytes);
if (FAILED(hr)) {
ALLEGRO_ERROR("Unlock failed: %s\n", ds_get_error(hr));
}
}
saved_play_cursor += block1_bytes + block2_bytes;
saved_play_cursor %= buffer_size;
} while (!ex_data->stop_voice);
ex_data->ds8_buffer->Stop();
al_free(silence);
ex_data->stop_voice = 0;
al_broadcast_cond(voice->cond);
return NULL;
}
static void* oss_update(ALLEGRO_THREAD *self, void *arg)
{
ALLEGRO_VOICE *voice = arg;
OSS_VOICE *oss_voice = voice->extra;
(void)self;
while (!oss_voice->quit_poll_thread) {
/*
For possible eventual non-blocking mode:
audio_buf_info bi;
if (ioctl(oss_voice->fd, SNDCTL_DSP_GETOSPACE, &bi) == -1) {
TRACE(PREFIX_E "Error SNDCTL_DSP_GETOSPACE.\n");
TRACE(PREFIX_E "errno: %i -- %s\n", errno, strerror(errno));
return NULL;
}
len = bi.bytes;
*/
/* How many bytes are we supposed to try to write at once? */
unsigned int frames = 1024;
if (oss_voice->stop && !oss_voice->stopped) {
oss_voice->stopped = true;
}
if (!oss_voice->stop && oss_voice->stopped) {
oss_voice->stopped = false;
}
if (!voice->is_streaming && !oss_voice->stopped) {
void *buf;
int bytes = frames * oss_voice->frame_size;
oss_update_nonstream_voice(voice, &buf, &bytes);
frames = bytes / oss_voice->frame_size;
if (write(oss_voice->fd, buf, bytes) == -1) {
ALLEGRO_ERROR("errno: %i -- %s\n", errno, strerror(errno));
if (errno != EINTR)
return NULL;
}
}
else if (voice->is_streaming && !oss_voice->stopped) {
const void *data = _al_voice_update(voice, &frames);
if (data == NULL)
goto silence;
if (write(oss_voice->fd, data, frames * oss_voice->frame_size) == -1) {
ALLEGRO_ERROR("errno: %i -- %s\n", errno, strerror(errno));
if (errno != EINTR)
return NULL;
}
}
else {
silence:
/* If stopped just fill with silence. */
memset(sil_buf, _al_kcm_get_silence(voice->depth), SIL_BUF_SIZE);
if(write(oss_voice->fd, sil_buf, SIL_BUF_SIZE) == -1) {
ALLEGRO_ERROR("errno: %i -- %s\n", errno, strerror(errno));
}
}
}
return NULL;
}
/* TODO: review */
static void *_openal_update(ALLEGRO_THREAD *self, void *arg)
{
ALLEGRO_VOICE *voice = (ALLEGRO_VOICE*) arg;
ALLEGRO_AL_DATA *ex_data = (ALLEGRO_AL_DATA*)voice->extra;
unsigned int i, samples_per_update;
unsigned int bytes_per_sample;
const void *data;
void *silence;
/* Streams should not be set to looping */
alSourcei(ex_data->source, AL_LOOPING, AL_FALSE);
silence = al_calloc(1, ex_data->buffer_size);
if (ex_data->format == AL_FORMAT_STEREO8 ||
ex_data->format == AL_FORMAT_MONO8) {
memset(silence, 0x80, ex_data->buffer_size);
}
for (i = 0; i < ex_data->num_buffers; i++) {
alBufferData(ex_data->buffers[i], ex_data->format, silence,
ex_data->buffer_size, voice->frequency);
}
alSourceQueueBuffers(ex_data->source, ex_data->num_buffers,
ex_data->buffers);
alSourcePlay(ex_data->source);
switch (ex_data->format) {
case AL_FORMAT_STEREO16:
bytes_per_sample = 4;
break;
case AL_FORMAT_STEREO8:
case AL_FORMAT_MONO16:
bytes_per_sample = 2;
break;
default:
bytes_per_sample = 1;
break;
}
samples_per_update = ex_data->buffer_size / bytes_per_sample;
data = silence;
while (!al_get_thread_should_stop(self)) {
ALint status = 0;
alGetSourcei(ex_data->source, AL_BUFFERS_PROCESSED, &status);
if (status <= 0) {
/* FIXME what is this for ? */
al_rest(0.001);
continue;
}
while (--status >= 0) {
ALuint buffer;
data = _al_voice_update(voice, voice->mutex, &samples_per_update);
if (data == NULL)
data = silence;
alSourceUnqueueBuffers(ex_data->source, 1, &buffer);
alBufferData(buffer, ex_data->format, data,
samples_per_update * bytes_per_sample, voice->frequency);
alSourceQueueBuffers(ex_data->source, 1, &buffer);
}
alGetSourcei(ex_data->source, AL_SOURCE_STATE, &status);
if (status == AL_STOPPED) {
alSourcePlay(ex_data->source);
}
}
alSourceStop(ex_data->source);
al_free(silence);
ex_data->stopped = true;
al_broadcast_cond(voice->cond);
return NULL;
}
static void *pulseaudio_update(ALLEGRO_THREAD *self, void *data)
{
ALLEGRO_VOICE *voice = data;
PULSEAUDIO_VOICE *pv = voice->extra;
(void)self;
for (;;) {
enum PULSEAUDIO_VOICE_STATUS status;
al_lock_mutex(voice->mutex);
while ((status = pv->status) == PV_IDLE) {
al_wait_cond(pv->status_cond, voice->mutex);
}
al_unlock_mutex(voice->mutex);
if (status == PV_JOIN) {
break;
}
if (status == PV_PLAYING) {
unsigned int frames = pv->buffer_size_in_frames;
if (voice->is_streaming) {
// streaming audio
const void *data = _al_voice_update(voice, voice->mutex, &frames);
if (data) {
pa_simple_write(pv->s, data,
frames * pv->frame_size_in_bytes, NULL);
}
}
else {
// direct buffer audio
al_lock_mutex(pv->buffer_mutex);
const char *data = pv->buffer;
unsigned int len = frames * pv->frame_size_in_bytes;
pv->buffer += frames * pv->frame_size_in_bytes;
if (pv->buffer > pv->buffer_end) {
len = pv->buffer_end - data;
pv->buffer = voice->attached_stream->spl_data.buffer.ptr;
voice->attached_stream->pos = 0;
if (voice->attached_stream->loop == ALLEGRO_PLAYMODE_ONCE) {
al_lock_mutex(voice->mutex);
pv->status = PV_STOPPING;
al_broadcast_cond(pv->status_cond);
al_unlock_mutex(voice->mutex);
}
}
else {
voice->attached_stream->pos += frames;
}
al_unlock_mutex(pv->buffer_mutex);
pa_simple_write(pv->s, data, len, NULL);
}
}
else if (status == PV_STOPPING) {
pa_simple_drain(pv->s, NULL);
al_lock_mutex(voice->mutex);
pv->status = PV_IDLE;
al_broadcast_cond(pv->status_cond);
al_unlock_mutex(voice->mutex);
}
}
return NULL;
}
