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winealsa.drv: Inject handle_underrun=1 setting for pulse-backed devices.

oldstable
Andrew Eikum 2011-08-05 09:33:10 -05:00 committed by Alexandre Julliard
parent 8c109aee13
commit 9ad60d1d14
1 changed files with 104 additions and 6 deletions
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110
dlls/winealsa.drv/mmdevdrv.c
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@ -407,12 +407,96 @@ HRESULT WINAPI AUDDRV_GetEndpointIDs(EDataFlow flow, WCHAR ***ids, char ***keys,
return S_OK;
}
/* Using the pulse PCM device from alsa-plugins 1.0.24 triggers a bug
* which causes audio to cease playing after a few minutes of playback.
* Setting handle_underrun=1 on pulse-backed ALSA devices seems to work
* around this issue. */
static snd_config_t *make_handle_underrun_config(const char *name)
{
snd_config_t *lconf, *dev_node, *hu_node, *type_node;
char dev_node_name[64];
const char *type_str;
int err;
snd_config_update();
if((err = snd_config_copy(&lconf, snd_config)) < 0){
WARN("snd_config_copy failed: %d (%s)\n", err, snd_strerror(err));
return NULL;
}
sprintf(dev_node_name, "pcm.%s", name);
err = snd_config_search(lconf, dev_node_name, &dev_node);
if(err == -ENOENT){
snd_config_delete(lconf);
return NULL;
}
if(err < 0){
snd_config_delete(lconf);
WARN("snd_config_search failed: %d (%s)\n", err, snd_strerror(err));
return NULL;
}
/* ALSA is extremely fragile. If it runs into a config setting it doesn't
* recognize, it tends to fail or assert. So we only want to inject
* handle_underrun=1 on devices that we know will recognize it. */
err = snd_config_search(dev_node, "type", &type_node);
if(err == -ENOENT){
snd_config_delete(lconf);
return NULL;
}
if(err < 0){
snd_config_delete(lconf);
WARN("snd_config_search failed: %d (%s)\n", err, snd_strerror(err));
return NULL;
}
if((err = snd_config_get_string(type_node, &type_str)) < 0){
snd_config_delete(lconf);
return NULL;
}
if(strcmp(type_str, "pulse") != 0){
snd_config_delete(lconf);
return NULL;
}
err = snd_config_search(dev_node, "handle_underrun", &hu_node);
if(err >= 0){
/* user already has an explicit handle_underrun setting, so don't
* use a local config */
snd_config_delete(lconf);
return NULL;
}
if(err != -ENOENT){
snd_config_delete(lconf);
WARN("snd_config_search failed: %d (%s)\n", err, snd_strerror(err));
return NULL;
}
if((err = snd_config_imake_integer(&hu_node, "handle_underrun", 1)) < 0){
snd_config_delete(lconf);
WARN("snd_config_imake_integer failed: %d (%s)\n", err,
snd_strerror(err));
return NULL;
}
if((err = snd_config_add(dev_node, hu_node)) < 0){
snd_config_delete(lconf);
WARN("snd_config_add failed: %d (%s)\n", err, snd_strerror(err));
return NULL;
}
return lconf;
}
HRESULT WINAPI AUDDRV_GetAudioEndpoint(const char *key, IMMDevice *dev,
EDataFlow dataflow, IAudioClient **out)
{
ACImpl *This;
int err;
snd_pcm_stream_t stream;
snd_config_t *lconf;
TRACE("\"%s\" %p %d %p\n", key, dev, dataflow, out);
@ -436,13 +520,27 @@ HRESULT WINAPI AUDDRV_GetAudioEndpoint(const char *key, IMMDevice *dev,
return E_UNEXPECTED;
}
lconf = make_handle_underrun_config(key);
This->dataflow = dataflow;
if((err = snd_pcm_open(&This->pcm_handle, key, stream,
SND_PCM_NONBLOCK)) < 0){
HeapFree(GetProcessHeap(), 0, This);
WARN("Unable to open PCM \"%s\": %d (%s)\n", key, err,
snd_strerror(err));
return E_FAIL;
if(lconf){
if((err = snd_pcm_open_lconf(&This->pcm_handle, key, stream,
SND_PCM_NONBLOCK, lconf)) < 0){
snd_config_delete(lconf);
HeapFree(GetProcessHeap(), 0, This);
WARN("Unable to open PCM \"%s\": %d (%s)\n", key, err,
snd_strerror(err));
return E_FAIL;
}
snd_config_delete(lconf);
}else{
if((err = snd_pcm_open(&This->pcm_handle, key, stream,
SND_PCM_NONBLOCK)) < 0){
HeapFree(GetProcessHeap(), 0, This);
WARN("Unable to open PCM \"%s\": %d (%s)\n", key, err,
snd_strerror(err));
return E_FAIL;
}
}
This->hw_params = HeapAlloc(GetProcessHeap(), 0,