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dummy: implement pause/resume and improve period timing

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This commit is contained in:
Andrew Kelley 2015-07-20 13:16:52 -07:00
parent 96c8332246
commit 71a365ca1b
2 changed files with 33 additions and 15 deletions
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1
README.md
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@ -258,6 +258,7 @@ view `coverage/index.html` in a browser.
specify how much to peek() and if you don't peek all of it, save the specify how much to peek() and if you don't peek all of it, save the
unused to a buffer for you. unused to a buffer for you.
0. add len arguments to APIs that have char * 0. add len arguments to APIs that have char *
0. custom allocator support
## Planned Uses for libsoundio ## Planned Uses for libsoundio

47
src/dummy.cpp
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@ -13,6 +13,7 @@
#include <stdio.h> #include <stdio.h>
#include <string.h> #include <string.h>
#include <math.h>
struct SoundIoOutStreamDummy { struct SoundIoOutStreamDummy {
struct SoundIoOsThread *thread; struct SoundIoOsThread *thread;
@ -42,9 +43,8 @@ static void playback_thread_run(void *arg) {
long frames_consumed = 0; long frames_consumed = 0;
double time_per_frame = 1.0 / (double)outstream->sample_rate; double time_per_frame = 1.0 / (double)outstream->sample_rate;
while (osd->abort_flag.test_and_set()) {
soundio_os_cond_timed_wait(osd->cond, nullptr, outstream->period_duration);
while (osd->abort_flag.test_and_set()) {
double now = soundio_os_get_time(); double now = soundio_os_get_time();
double total_time = now - start_time; double total_time = now - start_time;
long total_frames = total_time / time_per_frame; long total_frames = total_time / time_per_frame;
@ -62,6 +62,12 @@ static void playback_thread_run(void *arg) {
} else if (read_count > 0) { } else if (read_count > 0) {
outstream->write_callback(outstream, read_count); outstream->write_callback(outstream, read_count);
} }
now = soundio_os_get_time();
double time_passed = now - start_time;
double next_period = start_time +
ceil(time_passed / outstream->period_duration) * outstream->period_duration;
double relative_time = next_period - now;
soundio_os_cond_timed_wait(osd->cond, nullptr, relative_time);
} }
} }
@ -151,23 +157,38 @@ static int outstream_open_dummy(SoundIoPrivate *si, SoundIoOutStreamPrivate *os)
return 0; return 0;
} }
static int outstream_start_dummy(SoundIoPrivate *soundio, SoundIoOutStreamPrivate *os) { static int outstream_pause_dummy(struct SoundIoPrivate *si, struct SoundIoOutStreamPrivate *os, bool pause) {
SoundIoOutStreamDummy *osd = (SoundIoOutStreamDummy *)os->backend_data;
if (pause) {
if (osd->thread) {
osd->abort_flag.clear();
soundio_os_cond_signal(osd->cond, nullptr);
soundio_os_thread_destroy(osd->thread);
osd->thread = nullptr;
}
} else {
if (!osd->thread) {
osd->abort_flag.test_and_set();
int err;
if ((err = soundio_os_thread_create(playback_thread_run, os, true, &osd->thread))) {
return err;
}
}
}
return 0;
}
static int outstream_start_dummy(SoundIoPrivate *si, SoundIoOutStreamPrivate *os) {
SoundIoOutStream *outstream = &os->pub; SoundIoOutStream *outstream = &os->pub;
SoundIoOutStreamDummy *osd = (SoundIoOutStreamDummy *)os->backend_data; SoundIoOutStreamDummy *osd = (SoundIoOutStreamDummy *)os->backend_data;
soundio_outstream_fill_with_silence(outstream); soundio_outstream_fill_with_silence(outstream);
assert(soundio_ring_buffer_fill_count(&osd->ring_buffer) == osd->buffer_size); assert(soundio_ring_buffer_fill_count(&osd->ring_buffer) == osd->buffer_size);
osd->abort_flag.test_and_set(); return outstream_pause_dummy(si, os, false);
int err;
if ((err = soundio_os_thread_create(playback_thread_run, os, true, &osd->thread))) {
return err;
}
return 0;
} }
static int outstream_free_count_dummy(SoundIoPrivate *soundio, SoundIoOutStreamPrivate *os) { static int outstream_free_count_dummy(SoundIoPrivate *si, SoundIoOutStreamPrivate *os) {
SoundIoOutStream *outstream = &os->pub; SoundIoOutStream *outstream = &os->pub;
SoundIoOutStreamDummy *osd = (SoundIoOutStreamDummy *)os->backend_data; SoundIoOutStreamDummy *osd = (SoundIoOutStreamDummy *)os->backend_data;
int fill_count = soundio_ring_buffer_fill_count(&osd->ring_buffer); int fill_count = soundio_ring_buffer_fill_count(&osd->ring_buffer);
@ -214,10 +235,6 @@ static void outstream_clear_buffer_dummy(SoundIoPrivate *si, SoundIoOutStreamPri
soundio_ring_buffer_clear(&osd->ring_buffer); soundio_ring_buffer_clear(&osd->ring_buffer);
} }
static int outstream_pause_dummy(struct SoundIoPrivate *si, struct SoundIoOutStreamPrivate *os, bool pause) {
soundio_panic("TODO");
}
static int instream_open_dummy(SoundIoPrivate *si, SoundIoInStreamPrivate *is) { static int instream_open_dummy(SoundIoPrivate *si, SoundIoInStreamPrivate *is) {
soundio_panic("TODO"); soundio_panic("TODO");
} }