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Remove silence generation in waveout module.

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git-svn-id: file:///home/lennart/svn/public/pulseaudio/trunk@1325 fefdeb5f-60dc-0310-8127-8f9354f1896f
This commit is contained in:
Pierre Ossman 2006-08-22 16:15:47 +00:00
parent 095f35725d
commit d194604402
1 changed files with 34 additions and 51 deletions
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85
src/modules/module-waveout.c
View file

@ -75,11 +75,10 @@ struct userdata {
uint32_t free_ofrags, free_ifrags;
DWORD written_bytes;
int sink_underflow;
int cur_ohdr, cur_ihdr;
unsigned int oremain;
WAVEHDR *ohdrs, *ihdrs;
pa_memchunk silence;
HWAVEOUT hwo;
HWAVEIN hwi;
@ -110,8 +109,8 @@ static void update_usage(struct userdata *u) {
static void do_write(struct userdata *u)
{
uint32_t free_frags, remain;
pa_memchunk memchunk, *cur_chunk;
uint32_t free_frags;
pa_memchunk memchunk;
WAVEHDR *hdr;
MMRESULT res;
@ -119,13 +118,10 @@ static void do_write(struct userdata *u)
return;
EnterCriticalSection(&u->crit);
free_frags = u->free_ofrags;
u->free_ofrags = 0;
LeaveCriticalSection(&u->crit);
if (free_frags == u->fragments)
if (!u->sink_underflow && (free_frags == u->fragments))
pa_log_debug("WaveOut underflow!");
while (free_frags) {
@ -133,45 +129,39 @@ static void do_write(struct userdata *u)
if (hdr->dwFlags & WHDR_PREPARED)
waveOutUnprepareHeader(u->hwo, hdr, sizeof(WAVEHDR));
remain = u->oremain;
while (remain) {
cur_chunk = &memchunk;
hdr->dwBufferLength = 0;
while (hdr->dwBufferLength < u->fragment_size) {
size_t len;
if (pa_sink_render(u->sink, remain, cur_chunk) < 0) {
/*
* Don't fill with silence unless we're getting close to
* underflowing.
*/
if (free_frags > u->fragments/2)
cur_chunk = &u->silence;
else {
EnterCriticalSection(&u->crit);
len = u->fragment_size - hdr->dwBufferLength;
u->free_ofrags += free_frags;
if (pa_sink_render(u->sink, len, &memchunk) < 0)
break;
LeaveCriticalSection(&u->crit);
assert(memchunk.memblock);
assert(memchunk.memblock->data);
assert(memchunk.length);
u->oremain = remain;
return;
}
}
if (memchunk.length < len)
len = memchunk.length;
assert(cur_chunk->memblock);
assert(cur_chunk->memblock->data);
assert(cur_chunk->length);
memcpy(hdr->lpData + hdr->dwBufferLength,
(char*)memchunk.memblock->data + memchunk.index, len);
memcpy(hdr->lpData + u->fragment_size - remain,
(char*)cur_chunk->memblock->data + cur_chunk->index,
(cur_chunk->length < remain)?cur_chunk->length:remain);
hdr->dwBufferLength += len;
remain -= (cur_chunk->length < remain)?cur_chunk->length:remain;
if (cur_chunk != &u->silence) {
pa_memblock_unref(cur_chunk->memblock);
cur_chunk->memblock = NULL;
}
pa_memblock_unref(memchunk.memblock);
memchunk.memblock = NULL;
}
/* Insufficient data in sink buffer? */
if (hdr->dwBufferLength == 0) {
u->sink_underflow = 1;
break;
}
u->sink_underflow = 0;
res = waveOutPrepareHeader(u->hwo, hdr, sizeof(WAVEHDR));
if (res != MMSYSERR_NOERROR) {
pa_log_error(__FILE__ ": ERROR: Unable to prepare waveOut block: %d",
@ -183,12 +173,15 @@ static void do_write(struct userdata *u)
res);
}
u->written_bytes += u->fragment_size;
u->written_bytes += hdr->dwBufferLength;
EnterCriticalSection(&u->crit);
u->free_ofrags--;
LeaveCriticalSection(&u->crit);
free_frags--;
u->cur_ohdr++;
u->cur_ohdr %= u->fragments;
u->oremain = u->fragment_size;
}
}
@ -540,8 +533,7 @@ int pa__init(pa_core *c, pa_module*m) {
u->fragment_size = frag_size - (frag_size % pa_frame_size(&ss));
u->written_bytes = 0;
u->oremain = u->fragment_size;
u->sink_underflow = 1;
u->poll_timeout = pa_bytes_to_usec(u->fragments * u->fragment_size / 10, &ss);
@ -570,12 +562,6 @@ int pa__init(pa_core *c, pa_module*m) {
assert(u->ohdrs);
}
u->silence.length = u->fragment_size;
u->silence.memblock = pa_memblock_new(u->core->mempool, u->silence.length);
assert(u->silence.memblock);
pa_silence_memblock(u->silence.memblock, &ss);
u->silence.index = 0;
u->module = m;
m->userdata = u;
@ -611,9 +597,6 @@ void pa__done(pa_core *c, pa_module*m) {
if (!(u = m->userdata))
return;
if (u->silence.memblock)
pa_memblock_unref(u->silence.memblock);
if (u->event)
c->mainloop->time_free(u->event);