static int process_cb(jack_nframes_t nframes, void *data)
{
int i;
jack_nframes_t f, avail[2], min_avail;
jack_t *jd = (jack_t*)data;
if (nframes <= 0)
{
#ifdef HAVE_THREADS
scond_signal(jd->cond);
#endif
return 0;
}
avail[0] = jack_ringbuffer_read_space(jd->buffer[0]);
avail[1] = jack_ringbuffer_read_space(jd->buffer[1]);
min_avail = ((avail[0] < avail[1]) ? avail[0] : avail[1]) / sizeof(jack_default_audio_sample_t);
if (min_avail > nframes)
min_avail = nframes;
for (i = 0; i < 2; i++)
{
jack_default_audio_sample_t *out = (jack_default_audio_sample_t*)jack_port_get_buffer(jd->ports[i], nframes);
assert(out);
jack_ringbuffer_read(jd->buffer[i], (char*)out, min_avail * sizeof(jack_default_audio_sample_t));
for (f = min_avail; f < nframes; f++)
out[f] = 0.0f;
}
#ifdef HAVE_THREADS
scond_signal(jd->cond);
#endif
return 0;
}
void
JackLayer::read(AudioBuffer &buffer)
{
for (unsigned i = 0; i < in_ringbuffers_.size(); ++i) {
const size_t incomingSamples = jack_ringbuffer_read_space(in_ringbuffers_[i]) / sizeof(captureFloatBuffer_[0]);
if (!incomingSamples)
continue;
captureFloatBuffer_.resize(incomingSamples);
buffer.resize(incomingSamples);
// write to output
const size_t from_ringbuffer = jack_ringbuffer_read_space(in_ringbuffers_[i]);
const size_t expected_bytes = std::min(incomingSamples * sizeof(captureFloatBuffer_[0]), from_ringbuffer);
// FIXME: while we have samples to write AND while we have space to write them
const size_t read_bytes = jack_ringbuffer_read(in_ringbuffers_[i],
(char *) captureFloatBuffer_.data(), expected_bytes);
if (read_bytes < expected_bytes) {
RING_WARN("Dropped %zu bytes", expected_bytes - read_bytes);
break;
}
/* Write the data one frame at a time. This is
* inefficient, but makes things simpler. */
// FIXME: this is braindead, we should write blocks of samples at a time
// convert a vector of samples from 1 channel to a float vector
convertFromFloat(captureFloatBuffer_, *buffer.getChannel(i));
}
}
static int jackrack_get_audio( mlt_frame frame, void **buffer, mlt_audio_format *format, int *frequency, int *channels, int *samples )
{
// Get the filter service
mlt_filter filter = mlt_frame_pop_audio( frame );
// Get the filter properties
mlt_properties filter_properties = MLT_FILTER_PROPERTIES( filter );
int jack_frequency = mlt_properties_get_int( filter_properties, "_sample_rate" );
// Get the producer's audio
*format = mlt_audio_float;
mlt_frame_get_audio( frame, buffer, format, &jack_frequency, channels, samples );
// TODO: Deal with sample rate differences
if ( *frequency != jack_frequency )
mlt_log_error( MLT_FILTER_SERVICE( filter ), "mismatching frequencies JACK = %d actual = %d\n",
jack_frequency, *frequency );
*frequency = jack_frequency;
// Initialise Jack ports and connections if needed
if ( mlt_properties_get_int( filter_properties, "_samples" ) == 0 )
mlt_properties_set_int( filter_properties, "_samples", *samples );
// Get the filter-specific properties
jack_ringbuffer_t **output_buffers = mlt_properties_get_data( filter_properties, "output_buffers", NULL );
jack_ringbuffer_t **input_buffers = mlt_properties_get_data( filter_properties, "input_buffers", NULL );
// pthread_mutex_t *output_lock = mlt_properties_get_data( filter_properties, "output_lock", NULL );
// pthread_cond_t *output_ready = mlt_properties_get_data( filter_properties, "output_ready", NULL );
// Process the audio
float *q = (float*) *buffer;
size_t size = *samples * sizeof(float);
int j;
// struct timespec tm = { 0, 0 };
// Write into output ringbuffer
for ( j = 0; j < *channels; j++ )
{
if ( jack_ringbuffer_write_space( output_buffers[j] ) >= size )
jack_ringbuffer_write( output_buffers[j], (char*)( q + j * *samples ), size );
}
// Synchronization phase - wait for signal from Jack process
while ( jack_ringbuffer_read_space( input_buffers[ *channels - 1 ] ) < size ) ;
//pthread_cond_wait( output_ready, output_lock );
// Read from input ringbuffer
for ( j = 0; j < *channels; j++, q++ )
{
if ( jack_ringbuffer_read_space( input_buffers[j] ) >= size )
jack_ringbuffer_read( input_buffers[j], (char*)( q + j * *samples ), size );
}
// help jack_sync() indicate when we are rolling
mlt_position pos = mlt_frame_get_position( frame );
mlt_properties_set_position( filter_properties, "_last_pos", pos );
return 0;
}
static int process_cb(jack_nframes_t nframes, void *data)
{
jack_t *jd = (jack_t*)data;
if (nframes <= 0)
{
pthread_cond_signal(&jd->cond);
return 0;
}
jack_nframes_t avail[2];
avail[0] = jack_ringbuffer_read_space(jd->buffer[0]);
avail[1] = jack_ringbuffer_read_space(jd->buffer[1]);
jack_nframes_t min_avail = ((avail[0] < avail[1]) ? avail[0] : avail[1]) / sizeof(jack_default_audio_sample_t);
if (min_avail > nframes)
min_avail = nframes;
for (int i = 0; i < 2; i++)
{
jack_default_audio_sample_t *out = (jack_default_audio_sample_t*)jack_port_get_buffer(jd->ports[i], nframes);
assert(out);
jack_ringbuffer_read(jd->buffer[i], (char*)out, min_avail * sizeof(jack_default_audio_sample_t));
for (jack_nframes_t f = min_avail; f < nframes; f++)
{
out[f] = 0.0f;
}
}
pthread_cond_signal(&jd->cond);
return 0;
}
/*------------------------------------------------------------------------------
* Check wether read() would return anything
*----------------------------------------------------------------------------*/
bool
JackDspSource :: canRead ( unsigned int sec,
unsigned int usec ) throw ( Exception )
{
size_t available=0;
if ( !isOpen() ) {
return false;
}
// How many bytes available in ring buffer ?
available = jack_ringbuffer_read_space( rb[0] );
if (available) return true;
// Sleep and check again
// FIXME: should we really sleep the full duration ?
usleep( (sec*1000000) + usec );
available = jack_ringbuffer_read_space( rb[0] );
if (available) {
return true;
} else {
return false;
}
}
static inline void
update_playposition (int64_t decoder_position, float varispeed)
{
#ifdef ENABLE_RESAMPLING
const int64_t latency = floor(jack_ringbuffer_read_space(rb) / myplayer->info.channels / sizeof(float) / m_fResampleRatio / varispeed);
#else
const int64_t latency = floor(jack_ringbuffer_read_space(rb) / myplayer->info.channels);
#endif
if (!play->config.loop || decoder_position > latency)
play_position = decoder_position - latency;
else
play_position = m_frames + decoder_position - latency;
}
int
jack_ringbuffer_wait_for_read ( const jack_ringbuffer_t *r ,
int nbytes , int fd )
{
int space = (int) jack_ringbuffer_read_space ( r ) ;
while ( space < nbytes ) {
char b ;
if ( read ( fd , &b , 1 ) == -1 ) {
eprintf ( "%s: error reading communication pipe\n" , __func__ ) ;
FAILURE ;
}
space = (int) jack_ringbuffer_read_space ( r ) ;
}
return space ;
}
static int process_jack(jack_nframes_t nframes, void* arg)
{
int cnt;
if (!ready) {
return 0;
}
for(int i = 0; i < CHANNELS; i++) {
out[i] = jack_port_get_buffer(outputports[i], nframes);
}
for(size_t i = 0; i < nframes; i++) {
if (jack_ringbuffer_read_space(ringbuffer) >= SAMPLE_SIZE * CHANNELS) {
for(int j = 0; j < CHANNELS; j++){
jack_ringbuffer_read (ringbuffer, (char*)(out[j]+i), SAMPLE_SIZE);
}
} else {
printf ("underrun\n");
ready = 0;
return 0;
}
}
return 0;
}
void *
detect_note(void *arg)
{
jack_thread_info_t *info = (jack_thread_info_t *)arg;
jack_nframes_t samples_per_frame = info->channels;
size_t bytes_per_frame = samples_per_frame * sample_size, bytes;
gboolean done = FALSE;
float sample, *frame;
int i;
frame = (float *)alloca(bytes_per_frame);
pthread_setcanceltype (PTHREAD_CANCEL_ASYNCHRONOUS, NULL);
pthread_mutex_lock(&detect_lock);
info->status = 0;
while (!done) {
while (info->can_capture &&
jack_ringbuffer_read_space(rb) >= bytes_per_frame) {
jack_ringbuffer_read(rb, frame, bytes_per_frame);
fftMeasure(1, bytes_per_frame, frame);
}
//wait for data
pthread_cond_wait (&data_ready, &detect_lock);
}
pthread_mutex_unlock(&detect_lock);
}
static size_t rotter_read_from_ringbuffer(rotter_ringbuffer_t *ringbuffer, size_t desired_frames)
{
size_t desired_bytes = desired_frames * sizeof(jack_default_audio_sample_t);
size_t available_bytes = 0;
int c, bytes_read = 0;
// Is there enough in the ring buffers?
for (c=0; c<channels; c++) {
available_bytes = jack_ringbuffer_read_space( ringbuffer->buffer[c] );
if (available_bytes <= 0) {
// Try again later
return 0;
}
}
if (available_bytes > desired_bytes)
available_bytes = desired_bytes;
// Get the audio out of the ring buffer
for (c=0; c<channels; c++) {
// Copy frames from ring buffer to temporary buffer
bytes_read = jack_ringbuffer_read( ringbuffer->buffer[c], (char*)tmp_buffer[c], available_bytes);
if (bytes_read != available_bytes) {
rotter_fatal( "Failed to read from ringbuffer %c channel %d.", ringbuffer->label, c);
return 0;
}
}
return bytes_read / sizeof(jack_default_audio_sample_t);
}
/** flush buffers and reset. Must only be called from the RT thread. */
void
Disk_Stream::base_flush ( bool is_output )
{
THREAD_ASSERT( RT );
/* flush buffers */
for ( int i = _rb.size(); i--; )
jack_ringbuffer_read_advance( _rb[ i ], jack_ringbuffer_read_space( _rb[ i ] ) );
/* sem_destroy( &_blocks ); */
/* if ( is_output ) */
/* sem_init( &_blocks, 0, _total_blocks ); */
/* else */
/* sem_init( &_blocks, 0, 0 ); */
if ( is_output )
{
int n;
sem_getvalue( &_blocks, &n );
n = _total_blocks - n;
while ( n-- )
sem_post( &_blocks );
}
else
{
sem_destroy( &_blocks );
sem_init( &_blocks, 0, 0 );
}
}
LIB_EXPORT size_t
jack_ringbuffer_read (jack_ringbuffer_t * rb, char *dest, size_t cnt)
{
size_t free_cnt;
size_t cnt2;
size_t to_read;
size_t n1, n2;
if ((free_cnt = jack_ringbuffer_read_space (rb)) == 0) {
return 0;
}
to_read = cnt > free_cnt ? free_cnt : cnt;
cnt2 = rb->read_ptr + to_read;
if (cnt2 > rb->size) {
n1 = rb->size - rb->read_ptr;
n2 = cnt2 & rb->size_mask;
} else {
n1 = to_read;
n2 = 0;
}
memcpy (dest, &(rb->buf[rb->read_ptr]), n1);
rb->read_ptr = (rb->read_ptr + n1) & rb->size_mask;
if (n2) {
memcpy (dest + n1, &(rb->buf[rb->read_ptr]), n2);
rb->read_ptr = (rb->read_ptr + n2) & rb->size_mask;
}
return to_read;
}
/*
* The process callback for this JACK application.
* It is called by JACK at the appropriate times.
* @nframes :
* @arg :
*/
int
process (jack_nframes_t nframes, void *arg)
{
JackCard* obj = (JackCard*) arg;
sample_t *out;
sample_t *in;
if (obj->clear && !obj->write.can_process) {
out = (sample_t *) jack_port_get_buffer (obj->write.port, nframes);
memset (out, 0, nframes * sizeof(sample_t));
obj->clear = FALSE;
}
if (!obj->can_process)
return 0;
if(obj->read.can_process) {
in = (sample_t *) jack_port_get_buffer (obj->read.port, nframes);
jack_ringbuffer_write (obj->read.buffer, (void *) in, sizeof(sample_t) * nframes);
}
if (obj->write.can_process) {
out = (sample_t *) jack_port_get_buffer (obj->write.port, nframes);
memset (out, 0, nframes * sizeof(sample_t));
if (obj->clear && jack_ringbuffer_read_space(obj->write.buffer) == 0) {
obj->write.can_process = FALSE;
if (!obj->read.open)
obj->can_process = FALSE;
obj->clear = FALSE;
return 0;
}
jack_ringbuffer_read (obj->write.buffer, (void *) out, sizeof(sample_t) * nframes);
}
return 0;
}
void *shout_thread(void *data) {
STREAM_HDR *stream;
size_t n;
int ret;
struct timespec nap;
stream = (STREAM_HDR *)data;
stream->streaming = 1;
while (stream->streaming) {
shout_sync(stream->shout);
n = jack_ringbuffer_read_space(stream->ringbuf);
if (n < 1) {
nap.tv_sec = shout_wait.tv_sec;
nap.tv_nsec = shout_wait.tv_nsec;
while (nanosleep(&nap, &nap) != 0);
continue;
}
if (n > stream->shoutbuf_size) {
if (stream->shoutbuf != NULL) free(stream->shoutbuf);
stream->shoutbuf = (char *)my_plain_malloc(n, "shout_thread");
stream->shoutbuf_size = n;
}
jack_ringbuffer_read(stream->ringbuf, stream->shoutbuf, n);
ret = shout_send(stream->shout,
(const unsigned char *)stream->shoutbuf, n);
if (ret != SHOUTERR_SUCCESS) {
log_msg("send err: %s\n",
shout_get_error(stream->shout));
}
}
return NULL;
}
void gui_ev(void)
{
while(jack_ringbuffer_read_space(gui_ring) >= 2048) {
jack_ringbuffer_read(gui_ring, gui_osc_buf, 2048);
gui_dispatch(gui_osc_buf);
}
}
void dsp_ev(void)
{
while(jack_ringbuffer_read_space(dsp_ring) >= 2048) {
jack_ringbuffer_read(dsp_ring, dsp_osc_buf, 2048);
dsp_dispatch(dsp_osc_buf);
}
}
/*
mast_fill_input_buffer()
Make sure input buffer if full of audio
*/
size_t mast_fill_input_buffer( MastAudioBuffer* buffer )
{
int frames_wanted = buffer->get_write_space();
size_t bytes_wanted = frames_wanted * buffer->get_channels() * sizeof( mast_sample_t );
size_t bytes_read = 0, frames_read = 0;
// Keep checking that there is enough audio available
while (jack_ringbuffer_read_space(g_ringbuffer) < bytes_wanted) {
MAST_WARNING( "Not enough audio available in ringbuffer; waiting" );
//MAST_DEBUG("Ring buffer is %u%% full", (jack_ringbuffer_read_space(g_ringbuffer)*100) / g_ringbuffer->size);
// Wait for some more audio to become available
pthread_mutex_lock(&g_ringbuffer_cond_mutex);
pthread_cond_wait(&g_ringbuffer_cond, &g_ringbuffer_cond_mutex);
pthread_mutex_unlock(&g_ringbuffer_cond_mutex);
}
// Copy frames from ring buffer to temporary buffer
bytes_read = jack_ringbuffer_read(g_ringbuffer, (char*)buffer->get_write_ptr(), bytes_wanted);
if (bytes_read<=0) MAST_FATAL( "Failed to read from ringbuffer" );
if (bytes_read!=bytes_wanted) MAST_WARNING("Failed to read enough audio for a full packet");
// Mark the space in the buffer as used
frames_read = bytes_read / (buffer->get_channels() * sizeof( mast_sample_t ));
buffer->add_frames( frames_read );
// Return the number
return frames_read;
}
/** take a single block from the ringbuffers and send it out the
* attached track's ports */
nframes_t
Playback_DS::process ( nframes_t nframes )
{
THREAD_ASSERT( RT );
const size_t block_size = nframes * sizeof( sample_t );
// printf( "process: %lu %lu %lu\n", _frame, _frame + nframes, nframes );
for ( int i = channels(); i--; )
{
void *buf = track()->output[ i ].buffer( nframes );
if ( engine->freewheeling() )
{
/* only ever read nframes at a time */
while ( jack_ringbuffer_read_space( _rb[i] ) < block_size )
usleep( 10 * 1000 );
jack_ringbuffer_read( _rb[ i ], ((char*)buf), block_size );
}
else
{
/* only ever read nframes at a time */
if ( jack_ringbuffer_read_space( _rb[i] ) < block_size )
{
++_xruns;
memset( buf, 0, block_size );
/* FIXME: we need to resync somehow */
}
else
{
jack_ringbuffer_read( _rb[ i ], (char*)buf, block_size );
}
}
/* TODO: figure out a way to stop IO while muted without losing sync */
if ( track()->mute() || ( Track::soloing() && ! track()->solo() ) )
buffer_fill_with_silence( (sample_t*)buf, nframes );
}
block_processed();
/* FIXME: bogus */
return nframes;
}
int jack_audio_callback(jack_nframes_t nframes, void *arg) {
int c,s;
WfAudioInfo* nfo = &myplayer->info;
#ifdef JACK_MIDI
int n;
void *jack_buf = jack_port_get_buffer(jack_midi_port, nframes);
int nevents = jack_midi_get_event_count(jack_buf);
for (n=0; n<nevents; n++) {
jack_midi_event_t ev;
jack_midi_event_get(&ev, jack_buf, n);
if (ev.size < 3 || ev.size > 3) continue; // filter note on/off
else {
event_queue[queued_events_end].time = ev.time;
event_queue[queued_events_end].size = ev.size;
memcpy (event_queue[queued_events_end].buffer, ev.buffer, ev.size);
queued_events_end = (queued_events_end +1 ) % JACK_MIDI_QUEUE_SIZE;
}
}
if (queued_events_start != queued_events_end) {
/* Tell the midi thread there is work to do. */
if(pthread_mutex_trylock(&midi_thread_lock) == 0) {
pthread_cond_signal(&midi_ready);
pthread_mutex_unlock(&midi_thread_lock);
}
}
#endif
if (!player_active) return (0);
for(c=0; c<nfo->channels; c++) {
j_out[c] = (jack_default_audio_sample_t*) jack_port_get_buffer(j_output_port[c], nframes);
}
if(playpause || jack_ringbuffer_read_space(rb) < nfo->channels * nframes * sizeof(jack_default_audio_sample_t)) {
silent = 1;
for(c=0; c< nfo->channels; c++) {
memset(j_out[c], 0, nframes * sizeof(jack_default_audio_sample_t));
}
} else {
silent=0;
/* de-interleave */
for(s=0; s<nframes; s++) {
for(c=0; c< nfo->channels; c++) {
jack_ringbuffer_read(rb, (char*) &j_out[c][s], sizeof(jack_default_audio_sample_t));
}
}
}
/* Tell the player thread there is work to do. */
if(pthread_mutex_trylock(&player_thread_lock) == 0) {
pthread_cond_signal(&buffer_ready);
pthread_mutex_unlock(&player_thread_lock);
}
return(0);
};
int ringbuffer_cread(jack_ringbuffer_t *rbuf, void *buf, size_t bufsz, int advance, uint32_t *tag, size_t *len)
/* C version: returns 1 on success and 0 on error */
{
jack_ringbuffer_data_t vec[2];
hdr_t hdr;
uint32_t len0;
size_t cnt;
/* peek for header */
cnt = jack_ringbuffer_peek(rbuf, (char*)&hdr, sizeof(hdr));
if(cnt != sizeof(hdr)) return 0;
/* see if there are 'len' bytes of data available */
cnt = jack_ringbuffer_read_space(rbuf);
if( cnt < (sizeof(hdr) + hdr.len) ) return 0;
/* check if data fits in the user provided buffer */
if(hdr.len > bufsz )
return luajack_error("not enough space for ringbuffer_read() "
"(at least %u bytes needed)", hdr.len);
*tag = hdr.tag;
*len = hdr.len;
if(hdr.len == 0) /* tag only */
{
if(advance)
jack_ringbuffer_read_advance(rbuf, sizeof(hdr));
if(bufsz>0) ((char*)buf)[0]='\0';
return 1;
}
/* get the read vector */
jack_ringbuffer_get_read_vector(rbuf, vec);
/* copy the data part in the user provided buffer */
if(vec[0].len >= (sizeof(hdr) + hdr.len)) /* all the data are in vec[0] */
memcpy(buf, vec[0].buf + sizeof(hdr), hdr.len);
else if(vec[0].len > sizeof(hdr)) /* part of the data are in vec[0] */
{
len0 = vec[0].len - sizeof(hdr);
memcpy(buf, vec[0].buf + sizeof(hdr), len0);
memcpy((char*)buf + len0, vec[1].buf, hdr.len - len0);
}
else /* part of the header and all of the data are in vec[1] */
{
len0 = sizeof(hdr) - vec[0].len; /* bytes oh header in vec[1] */
memcpy((char*)buf, vec[1].buf + len0, hdr.len);
}
if(advance)
jack_ringbuffer_read_advance(rbuf, sizeof(hdr) + hdr.len);
return 1;
}
int ringbuffer_luaread(jack_ringbuffer_t *rbuf, lua_State *L, int advance)
/* tag, data = read()
* returns tag=nil if there is not a complete message (header+data) in
* the ringbuffer
* if the header.len is 0, data is returned as an empty string ("")
*/
{
jack_ringbuffer_data_t vec[2];
hdr_t hdr;
uint32_t len;
size_t cnt;
/* peek for header */
cnt = jack_ringbuffer_peek(rbuf, (char*)&hdr, sizeof(hdr));
if(cnt != sizeof(hdr))
{ lua_pushnil(L); return 1; }
/* see if there are 'len' bytes of data available */
cnt = jack_ringbuffer_read_space(rbuf);
if( cnt < (sizeof(hdr) + hdr.len) )
{ lua_pushnil(L); return 1; }
lua_pushinteger(L, hdr.tag);
if(hdr.len == 0) /* header only */
{
if(advance)
jack_ringbuffer_read_advance(rbuf, sizeof(hdr));
lua_pushstring(L, "");
return 2;
}
/* get the read vector */
jack_ringbuffer_get_read_vector(rbuf, vec);
//printf("vec[0].len=%u, vec[1].len=%u hdr.len=%u\n",vec[0].len,vec[1].len,hdr.len);
if(vec[0].len >= (sizeof(hdr) + hdr.len)) /* data fits in vec[0] */
lua_pushlstring(L, vec[0].buf + sizeof(hdr), hdr.len);
else if(vec[0].len > sizeof(hdr))
{
len = vec[0].len - sizeof(hdr);
lua_pushlstring(L, vec[0].buf + sizeof(hdr), len);
lua_pushlstring(L, vec[1].buf, hdr.len - len);
lua_concat(L, 2);
}
else /* vec[0] contains only the header or part of it (data is all in vec[1]) */
{
len = sizeof(hdr) - vec[0].len; /* the first len bytes in vec1 are part of the header */
lua_pushlstring(L, vec[1].buf + len, hdr.len);
}
if(advance)
jack_ringbuffer_read_advance(rbuf, sizeof(hdr) + hdr.len);
return 2;
}
void Lv2Worker::respond()
{
uint32_t read_space = jack_ringbuffer_read_space(responseBuffer);
while (read_space) {
uint32_t size = 0;
jack_ringbuffer_read(responseBuffer, (char*)&size, sizeof(size));
jack_ringbuffer_read(responseBuffer, response, size);
interface->work_response(handle, size, response);
read_space -= sizeof(size) + size;
}
}
void cbox_jackio_poll_ports(struct cbox_io_impl *impl, struct cbox_command_target *fb)
{
struct cbox_jack_io_impl *jii = (struct cbox_jack_io_impl *)impl;
while (jack_ringbuffer_read_space(jii->rb_autoconnect) >= sizeof(jack_port_t *))
{
jack_port_t *portobj;
jack_ringbuffer_read(jii->rb_autoconnect, (char *)&portobj, sizeof(portobj));
port_autoconnect(jii, portobj, fb);
}
}
int jack_callback (jack_nframes_t nframes, void *arg) {
int jack_bsize = nframes * sizeof(jack_default_audio_sample_t);
const char *jack_b = jack_port_get_buffer(output_port, nframes);
if (jack_ringbuffer_write(ringbuf, (void *) jack_b, jack_bsize) < jack_bsize) {
fprintf(stderr, "buffer underrun!\n");
}
if ( rtmp_i && jack_ringbuffer_read_space(ringbuf) >= (buffer_samples * sizeof(jack_default_audio_sample_t)) ) {
ev_async_send(loop, &async);
}
return 0;
}
static jack_nframes_t
cbjack_stream_data_ready(cubeb_stream * stream)
{
jack_nframes_t max_num_frames = std::numeric_limits<jack_nframes_t>::max();
for(unsigned int c = 0; c < stream->params.channels; c++) {
size_t read_space = jack_ringbuffer_read_space(stream->ringbuffer[c]);
jack_nframes_t nframes = read_space / sizeof(float);
max_num_frames = std::min(nframes, max_num_frames);
}
return max_num_frames;
}
int AUD_JackDevice::jack_mix(jack_nframes_t length, void *data)
{
AUD_JackDevice* device = (AUD_JackDevice*)data;
unsigned int i;
int count = device->m_specs.channels;
char* buffer;
if(device->m_sync)
{
// play silence while syncing
for(unsigned int i = 0; i < count; i++)
memset(jack_port_get_buffer(device->m_ports[i], length), 0, length * sizeof(float));
}
else
{
size_t temp;
size_t readsamples = jack_ringbuffer_read_space(device->m_ringbuffers[0]);
for(i = 1; i < count; i++)
if((temp = jack_ringbuffer_read_space(device->m_ringbuffers[i])) < readsamples)
readsamples = temp;
readsamples = AUD_MIN(readsamples / sizeof(float), length);
for(unsigned int i = 0; i < count; i++)
{
buffer = (char*)jack_port_get_buffer(device->m_ports[i], length);
jack_ringbuffer_read(device->m_ringbuffers[i], buffer, readsamples * sizeof(float));
if(readsamples < length)
memset(buffer + readsamples * sizeof(float), 0, (length - readsamples) * sizeof(float));
}
if(pthread_mutex_trylock(&(device->m_mixingLock)) == 0)
{
pthread_cond_signal(&(device->m_mixingCondition));
pthread_mutex_unlock(&(device->m_mixingLock));
}
}
return 0;
}
unsigned int JackResampler::Read(jack_default_audio_sample_t* buffer, unsigned int frames)
{
size_t len = jack_ringbuffer_read_space(fRingBuffer);
jack_log("JackResampler::Read input available = %ld", len / sizeof(jack_default_audio_sample_t));
if (len < frames * sizeof(jack_default_audio_sample_t)) {
jack_error("JackResampler::Read : producer too slow, missing frames = %d", frames);
return 0;
} else {
jack_ringbuffer_read(fRingBuffer, (char*)buffer, frames * sizeof(jack_default_audio_sample_t));
return frames;
}
}
sample_t* JacksRbPort_read_from_ringbuffer(T _this_, int *len) {
size_t avail = jack_ringbuffer_read_space(_this_->rb);
jack_nframes_t rb_size = _this_->rb_size;
size_t blen = avail < rb_size ? avail : rb_size;
jack_ringbuffer_read(_this_->rb, _this_->framebuf, blen);
*len = blen;
return _this_->framebuf;
}
int JackWinMMEDriver::Read()
{
size_t size;
for (int chan = 0; chan < fCaptureChannels; chan++) {
if (fGraphManager->GetConnectionsNum(fCapturePortList[chan]) > 0) {
JackMidiBuffer* midi_buffer = GetInputBuffer(chan);
if (jack_ringbuffer_read_space (fRingBuffer[chan]) == 0) {
// Reset buffer
midi_buffer->Reset(midi_buffer->nframes);
} else {
while ((size = jack_ringbuffer_read_space (fRingBuffer[chan])) > 0) {
//jack_info("jack_ringbuffer_read_space %d", size);
int ev_count = 0;
jack_ringbuffer_read(fRingBuffer[chan], (char*)&ev_count, sizeof(int));
if (ev_count > 0) {
for (int j = 0; j < ev_count; j++) {
unsigned int event_len = 3;
// Read event actual data
jack_midi_data_t* dest = midi_buffer->ReserveEvent(0, event_len);
jack_ringbuffer_read(fRingBuffer[chan], (char*)dest, event_len);
}
}
}
}
} else {
//jack_info("Consume ring buffer");
jack_ringbuffer_read_advance(fRingBuffer[chan], jack_ringbuffer_read_space(fRingBuffer[chan]));
}
}
return 0;
}
/*------------------------------------------------------------------------------
* Check wether read() would return anything
*----------------------------------------------------------------------------*/
bool
JackDspSource :: canRead ( unsigned int sec,
unsigned int usec ) throw ( Exception )
{
const unsigned int max_wait_time = sec * 1000000;
const unsigned int wait_increment = 10000;
unsigned int cur_wait = 0;
if ( !isOpen() ) {
return false;
}
while (max_wait_time > cur_wait) {
bool canRead = true;
for (unsigned int c = 0 ; c < getChannel() ; c++) {
if (jack_ringbuffer_read_space(rb[c]) <= 0) {
canRead = false;
}
}
if (canRead) {
return true;
}
cur_wait += wait_increment;
usleep ( wait_increment );
}
usleep( usec );
for (unsigned int c = 0 ; c < getChannel() ; c++) {
if (jack_ringbuffer_read_space(rb[c]) <= 0) {
return false;
}
}
return true;
}