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Merge pull request #1485 from reicast/baka/alsa_cfg 

ALSA: configurable output device
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baka0815 2019-01-18 18:46:08 +01:00 committed by GitHub
parent 229f729c79 1b8f45c751
commit 55a2261002
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GPG Key ID: 4AEE18F83AFDEB23
1 changed files with 33 additions and 11 deletions
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44
core/oslib/audiobackend_alsa.cpp
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@ -1,36 +1,58 @@
#include "oslib/audiobackend_alsa.h"
#if USE_ALSA
#include <alsa/asoundlib.h>
#include "cfg/cfg.h"
snd_pcm_t *handle;
// We're making these functions static - there's no need to pollute the global namespace
static void alsa_init()
{
long loops;
int size;
snd_pcm_hw_params_t *params;
unsigned int val;
int dir=-1;
snd_pcm_uframes_t frames;
/* Open PCM device for playback. */
int rc = snd_pcm_open(&handle, "default", SND_PCM_STREAM_PLAYBACK, 0);
string device = cfgLoadStr("alsa", "device", "");
if (rc<0)
rc = snd_pcm_open(&handle, "plughw:0,0,0", SND_PCM_STREAM_PLAYBACK, 0);
int rc = -1;
if (device == "")
{
printf("ALSA: trying to determine audio device\n");
/* Open PCM device for playback. */
device = "default";
rc = snd_pcm_open(&handle, device.c_str(), SND_PCM_STREAM_PLAYBACK, 0);
if (rc<0)
rc = snd_pcm_open(&handle, "plughw:0,0", SND_PCM_STREAM_PLAYBACK, 0);
if (rc < 0)
{
device = "plughw:0,0,0";
rc = snd_pcm_open(&handle, device.c_str(), SND_PCM_STREAM_PLAYBACK, 0);
}
if (rc < 0)
{
device = "plughw:0,0";
rc = snd_pcm_open(&handle, device.c_str(), SND_PCM_STREAM_PLAYBACK, 0);
}
if (rc >= 0)
{
// init successfull, write value back to config
cfgSaveStr("alsa", "device", device.c_str());
}
}
else {
rc = snd_pcm_open(&handle, device.c_str(), SND_PCM_STREAM_PLAYBACK, 0);
}
if (rc < 0)
{
fprintf(stderr, "unable to open PCM device: %s\n", snd_strerror(rc));
fprintf(stderr, "unable to open PCM device %s: %s\n", device.c_str(), snd_strerror(rc));
return;
}
printf("ALSA: Successfully initialized \"%s\"\n", device.c_str());
/* Allocate a hardware parameters object. */
snd_pcm_hw_params_alloca(&params);