diff options
| -rw-r--r-- | plugins/dfsound/alsa.c | 63 |
1 files changed, 51 insertions, 12 deletions
diff --git a/plugins/dfsound/alsa.c b/plugins/dfsound/alsa.c index 58900cc..1c02d37 100644 --- a/plugins/dfsound/alsa.c +++ b/plugins/dfsound/alsa.c @@ -24,24 +24,58 @@ static snd_pcm_t *handle = NULL; static snd_pcm_uframes_t buffer_size; +static void alsa_finish(void); + // SETUP SOUND static int alsa_init(void) { snd_pcm_hw_params_t *hwparams; snd_pcm_status_t *status; + snd_ctl_t *ctl_handle = NULL; + snd_ctl_card_info_t *info; unsigned int pspeed; int pchannels; int format; unsigned int buffer_time = 100000; unsigned int period_time = buffer_time / 4; + const char *alsa_name = "default"; + const char *name; + int retval = -1; int err; + name = getenv("ALSA_NAME"); + if (name != NULL) + alsa_name = name; + + snd_ctl_card_info_alloca(&info); + if ((err = snd_ctl_open(&ctl_handle, alsa_name, 0)) < 0) { + printf("control open: %s\n", snd_strerror(err)); + } + else if ((err = snd_ctl_card_info(ctl_handle, info)) < 0) { + printf("control info: %s\n", snd_strerror(err)); + snd_ctl_card_info_clear(info); + } + if (ctl_handle != NULL) + snd_ctl_close(ctl_handle); + + name = snd_ctl_card_info_get_name(info); + if (name != NULL) { + if (strcasecmp(name, "PulseAudio") == 0) { + // PulseAudio's ALSA emulation is known to be broken.. + printf("alsa: refusing to run under PulseAudio's emulation\n"); + return -1; + } + else { + printf("alsa: using '%s', set ALSA_NAME to change\n", name); + } + } + pchannels=2; pspeed = 44100; format = SND_PCM_FORMAT_S16; - if ((err = snd_pcm_open(&handle, "default", + if ((err = snd_pcm_open(&handle, alsa_name, SND_PCM_STREAM_PLAYBACK, SND_PCM_NONBLOCK)) < 0) { printf("Audio open error: %s\n", snd_strerror(err)); @@ -51,7 +85,7 @@ static int alsa_init(void) if((err = snd_pcm_nonblock(handle, 0))<0) { printf("Can't set blocking moded: %s\n", snd_strerror(err)); - return -1; + goto out; } snd_pcm_hw_params_alloca(&hwparams); @@ -59,60 +93,65 @@ static int alsa_init(void) if((err=snd_pcm_hw_params_any(handle, hwparams))<0) { printf("Broken configuration for this PCM: %s\n", snd_strerror(err)); - return -1; + goto out; } if((err=snd_pcm_hw_params_set_access(handle, hwparams, SND_PCM_ACCESS_RW_INTERLEAVED))<0) { printf("Access type not available: %s\n", snd_strerror(err)); - return -1; + goto out; } if((err=snd_pcm_hw_params_set_format(handle, hwparams, format))<0) { printf("Sample format not available: %s\n", snd_strerror(err)); - return -1; + goto out; } if((err=snd_pcm_hw_params_set_channels(handle, hwparams, pchannels))<0) { printf("Channels count not available: %s\n", snd_strerror(err)); - return -1; + goto out; } if((err=snd_pcm_hw_params_set_rate_near(handle, hwparams, &pspeed, 0))<0) { printf("Rate not available: %s\n", snd_strerror(err)); - return -1; + goto out; } if((err=snd_pcm_hw_params_set_buffer_time_near(handle, hwparams, &buffer_time, 0))<0) { printf("Buffer time error: %s\n", snd_strerror(err)); - return -1; + goto out; } if((err=snd_pcm_hw_params_set_period_time_near(handle, hwparams, &period_time, 0))<0) { printf("Period time error: %s\n", snd_strerror(err)); - return -1; + goto out; } if((err=snd_pcm_hw_params(handle, hwparams))<0) { printf("Unable to install hw params: %s\n", snd_strerror(err)); - return -1; + goto out; } snd_pcm_status_alloca(&status); if((err=snd_pcm_status(handle, status))<0) { printf("Unable to get status: %s\n", snd_strerror(err)); - return -1; + goto out; } buffer_size = snd_pcm_status_get_avail(status); - return 0; + retval = 0; + +out: + if (retval != 0) + alsa_finish(); + return retval; } // REMOVE SOUND |