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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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48
src/modules/module-alsa-source.c
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@ -533,19 +533,25 @@ 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;
pa_assert(l > 0);
if ((err = snd_pcm_status(u->pcm_handle, status)) < 0) {
pa_log("Failed to query DSP status data: %s", snd_strerror(t));
goto fail;
}
if (snd_pcm_status_get_avail_max(status)*u->frame_size >= u->hwbuf_size)
pa_log_debug("Buffer overrun!");
l = snd_pcm_status_get_avail(status) * u->frame_size;
if (l <= 0)
break;
chunk.memblock = pa_memblock_new(u->core->mempool, l);
p = pa_memblock_acquire(chunk.memblock);
@ -559,8 +565,7 @@ static void thread_func(void *userdata) {
if (t < 0) {
pa_memblock_unref(chunk.memblock);
if (t == -EPIPE)
pa_log_debug("Buffer underrun!");
pa_assert(t != -EPIPE);
if ((t = snd_pcm_recover(u->pcm_handle, t, 1)) == 0)
continue;
@ -573,18 +578,18 @@ static void thread_func(void *userdata) {
goto fail;
}
} else {
}
chunk.index = 0;
chunk.length = t * u->frame_size;
chunk.index = 0;
chunk.length = t * u->frame_size;
pa_source_post(u->source, &chunk);
pa_memblock_unref(chunk.memblock);
l -= t * u->frame_size;
pa_source_post(u->source, &chunk);
pa_memblock_unref(chunk.memblock);
work_done = 1;
work_done = 1;
}
if (t * u->frame_size >= (unsigned) l)
break;
}
}
@ -730,6 +735,11 @@ 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);