mirrors/pulseaudio
1
0
Fork 0
mirror of https://gitlab.freedesktop.org/pulseaudio/pulseaudio.git synced 2025-11-03 09:01:50 -05:00
Code Issues Projects Releases Packages Wiki Activity Actions

module-equalizer-sink: attempt different buffering strategy

Browse source
This commit is contained in:
Jason Newton 2009-07-16 22:00:38 -07:00 • committed by Jason Newton
parent 182c9c7dcb
commit d4fe5bfce9
1 changed files with 31 additions and 28 deletions
Download patch file Download diff file Expand all files Collapse all files

59
src/modules/module-equalizer-sink.c
View file

@ -259,6 +259,33 @@ static int sink_input_pop_cb(pa_sink_input *i, size_t nbytes, pa_memchunk *chunk
if (!u->sink || !PA_SINK_IS_OPENED(u->sink->thread_info.state))
return -1;
//collect the minimum number of samples
//TODO figure out a better way of buffering the needed
//number of samples, this doesn't seem to work correctly
//most of the itme
if(u->samples_gathered < u->R){
//render some new fragments to our memblockq
size_t desired_samples=PA_MIN(u->R-u->samples_gathered,u->max_output);
while (pa_memblockq_peek(u->memblockq, &tchunk) < 0) {
pa_memchunk nchunk;
pa_sink_render(u->sink, desired_samples*fs, &nchunk);
pa_memblockq_push(u->memblockq, &nchunk);
pa_memblock_unref(nchunk.memblock);
}
if(tchunk.length/fs!=desired_samples){
pa_log("got %ld samples, asked for %ld",tchunk.length/fs,desired_samples);
}
size_t n_samples=PA_MIN(tchunk.length/fs,u->R-u->samples_gathered);
pa_assert_se(n_samples<=u->R-u->samples_gathered);
src = (float*) ((uint8_t*) pa_memblock_acquire(tchunk.memblock) + tchunk.index);
for (size_t c=0;c<u->channels;c++) {
pa_sample_clamp(PA_SAMPLE_FLOAT32NE,u->input[c]+(u->window_size-u->R)+u->samples_gathered,sizeof(float), src+c, fs, n_samples);
}
u->samples_gathered+=n_samples;
pa_memblock_release(tchunk.memblock);
pa_memblock_unref(tchunk.memblock);
}
//output any buffered outputs first
if(u->n_buffered_output>0){
//pa_log("outputing %ld buffered samples",u->n_buffered_output);
@ -278,38 +305,14 @@ static int sink_input_pop_cb(pa_sink_input *i, size_t nbytes, pa_memchunk *chunk
}
pa_assert_se(u->n_buffered_output==0);
//collect the minimum number of samples
//TODO figure out a better way of buffering the needed
//number of samples, this doesn't seem to work correctly
while(u->samples_gathered < u->R){
//render some new fragments to our memblockq
size_t desired_samples=PA_MIN(u->R-u->samples_gathered,u->max_output);
while (pa_memblockq_peek(u->memblockq, &tchunk) < 0) {
pa_memchunk nchunk;
pa_sink_render(u->sink, desired_samples*fs, &nchunk);
pa_memblockq_push(u->memblockq, &nchunk);
pa_memblock_unref(nchunk.memblock);
}
if(tchunk.length/fs!=desired_samples){
pa_log("got %ld samples, asked for %ld",tchunk.length/fs,desired_samples);
}
size_t n_samples=PA_MIN(tchunk.length/fs,u->R-u->samples_gathered);
//TODO: figure out what to do with rest of the samples when there's too many (rare?)
src = (float*) ((uint8_t*) pa_memblock_acquire(tchunk.memblock) + tchunk.index);
for (size_t c=0;c<u->channels;c++) {
pa_sample_clamp(PA_SAMPLE_FLOAT32NE,u->input[c]+(u->window_size-u->R)+u->samples_gathered,sizeof(float), src+c, fs, n_samples);
}
u->samples_gathered+=n_samples;
pa_memblock_release(tchunk.memblock);
pa_memblock_unref(tchunk.memblock);
if(u->samples_gathered<u->R){
return -1;
}
//IT should be this guy if we're buffering like how its supposed to
//size_t n_outputable=PA_MIN(u->window_size-u->R,u->max_output);
//This one takes into account the actual data gathered but then the dsp
//stuff is wrong when the buffer "underruns"
size_t n_outputable=PA_MIN(u->R,u->max_output);
size_t n_outputable=PA_MIN(u->R,u->max_output)*(u->R==u->samples_gathered);
chunk->index=0;
chunk->length=n_outputable*fs;
@ -319,7 +322,6 @@ static int sink_input_pop_cb(pa_sink_input *i, size_t nbytes, pa_memchunk *chunk
pa_assert_se(u->fft_size>=u->window_size);
pa_assert_se(u->R<u->window_size);
pa_assert_se(u->samples_gathered>=u->R);
size_t sample_rem=u->R-n_outputable;
//use a linear-phase sliding STFT and overlap-add method (for each channel)
for (size_t c=0;c<u->channels;c++) {
@ -389,6 +391,7 @@ static int sink_input_pop_cb(pa_sink_input *i, size_t nbytes, pa_memchunk *chunk
//u->samplings++;
u->n_buffered_output+=sample_rem;
u->samples_gathered=0;
end:
pa_memblock_release(chunk->memblock);
return 0;
}