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Don't stop hardware on buffer underruns. Instead continue playing to guarantee that our time function stays as linear as possible.

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git-svn-id: file:///home/lennart/svn/public/pulseaudio/branches/lennart@1566 fefdeb5f-60dc-0310-8127-8f9354f1896f
This commit is contained in:
Lennart Poettering 2007-08-03 23:48:52 +00:00
parent a6c44c0e50
commit 95fab184d5
4 changed files with 92 additions and 50 deletions
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60
src/modules/module-alsa-sink.c
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@ -545,18 +545,23 @@ static void thread_func(void *userdata) {
goto fail;
} else {
ssize_t l;
if ((err = snd_pcm_status(u->pcm_handle, status)) >= 0)
l = snd_pcm_status_get_avail(status) * u->frame_size;
else
l = u->fragment_size;
while (l > 0) {
for (;;) {
void *p;
snd_pcm_sframes_t t;
ssize_t l;
if ((err = snd_pcm_status(u->pcm_handle, status)) < 0) {
pa_log("Failed to query DSP status data: %s", snd_strerror(t));
goto fail;
}
pa_assert(l > 0);
if (snd_pcm_status_get_avail_max(status)*u->frame_size >= u->hwbuf_size)
pa_log_debug("Buffer underrun!");
l = snd_pcm_status_get_avail(status) * u->frame_size;
if (l <= 0)
break;
if (u->memchunk.length <= 0)
pa_sink_render(u->sink, l, &u->memchunk);
@ -573,10 +578,7 @@ static void thread_func(void *userdata) {
if (t < 0) {
if (t == -EPIPE) {
pa_log_debug("Buffer underrun!");
u->first = 1;
}
pa_assert(t != -EPIPE);
if ((t = snd_pcm_recover(u->pcm_handle, t, 1)) == 0)
continue;
@ -588,21 +590,20 @@ static void thread_func(void *userdata) {
pa_log("Failed to write data to DSP: %s", snd_strerror(t));
goto fail;
}
} else {
u->memchunk.index += t * u->frame_size;
u->memchunk.length -= t * u->frame_size;
if (u->memchunk.length <= 0) {
pa_memblock_unref(u->memchunk.memblock);
pa_memchunk_reset(&u->memchunk);
}
l -= t * u->frame_size;
work_done = 1;
}
u->memchunk.index += t * u->frame_size;
u->memchunk.length -= t * u->frame_size;
if (u->memchunk.length <= 0) {
pa_memblock_unref(u->memchunk.memblock);
pa_memchunk_reset(&u->memchunk);
}
work_done = 1;
if (t * u->frame_size >= (unsigned) l)
break;
}
}
@ -756,6 +757,11 @@ int pa__init(pa_core *c, pa_module*m) {
if (u->use_mmap)
pa_log_info("Successfully enabled mmap() mode.");
if ((err = pa_alsa_set_sw_params(u->pcm_handle)) < 0) {
pa_log("Failed to set software parameters: %s", snd_strerror(err));
goto fail;
}
/* ALSA might tweak the sample spec, so recalculate the frame size */
frame_size = pa_frame_size(&ss);