diff options
Diffstat (limited to 'plugins/audio/audio-alsa.c')
| -rw-r--r-- | plugins/audio/audio-alsa.c | 100 |
1 files changed, 51 insertions, 49 deletions
diff --git a/plugins/audio/audio-alsa.c b/plugins/audio/audio-alsa.c index c13cdc59..813d8167 100644 --- a/plugins/audio/audio-alsa.c +++ b/plugins/audio/audio-alsa.c @@ -58,34 +58,36 @@ PUBLIC unsigned char _alsa_init (const char *name, audioCtxHandleT *ctx) { snd_mixer_selem_id_set_name (mixer_sid, "Master"); mixer_elm = snd_mixer_find_selem (mixer, mixer_sid); - snd_mixer_selem_get_playback_volume_range (mixer_elm, &vol_min, &vol_max); - snd_mixer_selem_get_playback_volume (mixer_elm, SND_MIXER_SCHN_FRONT_LEFT, &vol); + if (mixer_elm) { + snd_mixer_selem_get_playback_volume_range (mixer_elm, &vol_min, &vol_max); + snd_mixer_selem_get_playback_volume (mixer_elm, SND_MIXER_SCHN_FRONT_LEFT, &vol); + } /* allocate the global array if it hasn't been done */ - if (!dev_ctx) { - dev_ctx = (dev_ctx_T**) malloc (sizeof(dev_ctx_T)); - dev_ctx[0] = (dev_ctx_T*) malloc (sizeof(dev_ctx_T)); - dev_ctx[0]->name = NULL; - dev_ctx[0]->dev = NULL; + if (!adev_ctx) { + adev_ctx = (adev_ctx_T**) malloc (sizeof(adev_ctx_T)); + adev_ctx[0] = (adev_ctx_T*) malloc (sizeof(adev_ctx_T)); + adev_ctx[0]->name = NULL; + adev_ctx[0]->dev = NULL; } /* is a card with similar name already opened ? */ - for (num = 0; num < (sizeof(dev_ctx)/sizeof(dev_ctx_T)); num++) { - if (dev_ctx[num]->name && - !strcmp (dev_ctx[num]->name, name)) + for (num = 0; num < (sizeof(adev_ctx)/sizeof(adev_ctx_T)); num++) { + if (adev_ctx[num]->name && + !strcmp (adev_ctx[num]->name, name)) return 0; } num++; /* it's not... let us add it to the global array */ - dev_ctx = (dev_ctx_T**) realloc (dev_ctx, (num+1)*sizeof(dev_ctx_T)); - dev_ctx[num] = (dev_ctx_T*) malloc (sizeof(dev_ctx_T)); - dev_ctx[num]->name = strdup (name); - dev_ctx[num]->dev = dev; - dev_ctx[num]->params = params; - dev_ctx[num]->mixer_elm = mixer_elm; - dev_ctx[num]->vol_max = vol_max; - dev_ctx[num]->vol = vol; + adev_ctx = (adev_ctx_T**) realloc (adev_ctx, (num+1)*sizeof(adev_ctx_T)); + adev_ctx[num] = (adev_ctx_T*) malloc (sizeof(adev_ctx_T)); + adev_ctx[num]->name = strdup (name); + adev_ctx[num]->dev = dev; + adev_ctx[num]->params = params; + adev_ctx[num]->mixer_elm = mixer_elm; + adev_ctx[num]->vol_max = vol_max; + adev_ctx[num]->vol = vol; /* make the client context aware of current card state */ ctx->volume = _alsa_get_volume (num); @@ -99,15 +101,15 @@ PUBLIC void _alsa_free (const char *name) { int num; - for (num = 0; num < (sizeof(dev_ctx)/sizeof(dev_ctx_T)); num++) { - if (dev_ctx[num]->name && - !strcmp (dev_ctx[num]->name, name)) { - snd_pcm_close (dev_ctx[num]->dev); - snd_pcm_hw_params_free (dev_ctx[num]->params); - free (dev_ctx[num]->name); - dev_ctx[num]->name = NULL; - dev_ctx[num]->dev = NULL; - free(dev_ctx[num]); + for (num = 0; num < (sizeof(adev_ctx)/sizeof(adev_ctx_T)); num++) { + if (adev_ctx[num]->name && + !strcmp (adev_ctx[num]->name, name)) { + snd_pcm_close (adev_ctx[num]->dev); + snd_pcm_hw_params_free (adev_ctx[num]->params); + free (adev_ctx[num]->name); + adev_ctx[num]->name = NULL; + adev_ctx[num]->dev = NULL; + free(adev_ctx[num]); return; } } @@ -115,48 +117,48 @@ PUBLIC void _alsa_free (const char *name) { PUBLIC void _alsa_play (unsigned int num, void *buf, int len) { - if (!dev_ctx || !dev_ctx[num]) + if (!adev_ctx || !adev_ctx[num]) { return; - + } int16_t *cbuf = (int16_t *)buf; int frames = len / 2; int res; - if ((res = snd_pcm_writei (dev_ctx[num]->dev, cbuf, frames)) != frames) { - snd_pcm_recover (dev_ctx[num]->dev, res, 0); - snd_pcm_prepare (dev_ctx[num]->dev); + if ((res = snd_pcm_writei (adev_ctx[num]->dev, cbuf, frames)) != frames) { + snd_pcm_recover (adev_ctx[num]->dev, res, 0); + snd_pcm_prepare (adev_ctx[num]->dev); } - /* snd_pcm_drain (dev_ctx[num]->dev); */ + /* snd_pcm_drain (adev_ctx[num]->dev); */ } PUBLIC unsigned int _alsa_get_volume (unsigned int num) { - if (!dev_ctx || !dev_ctx[num]) + if (!adev_ctx || !adev_ctx[num] || !adev_ctx[num]->mixer_elm) return; - snd_mixer_selem_get_playback_volume (dev_ctx[num]->mixer_elm, SND_MIXER_SCHN_FRONT_LEFT, &dev_ctx[num]->vol); + snd_mixer_selem_get_playback_volume (adev_ctx[num]->mixer_elm, SND_MIXER_SCHN_FRONT_LEFT, &adev_ctx[num]->vol); - return (unsigned int)(dev_ctx[num]->vol*100)/dev_ctx[num]->vol_max; + return (unsigned int)(adev_ctx[num]->vol*100)/adev_ctx[num]->vol_max; } PUBLIC unsigned int _alsa_set_volume (unsigned int num, unsigned int vol) { - if (!dev_ctx || !dev_ctx[num] || vol > 100) + if (!adev_ctx || !adev_ctx[num] || !adev_ctx[num]->mixer_elm || vol > 100) return; - snd_mixer_selem_set_playback_volume_all (dev_ctx[num]->mixer_elm, (vol*dev_ctx[num]->vol_max)/100); + snd_mixer_selem_set_playback_volume_all (adev_ctx[num]->mixer_elm, (vol*adev_ctx[num]->vol_max)/100); } PUBLIC unsigned char _alsa_get_mute (unsigned int num) { int mute = 0; - if (!dev_ctx || !dev_ctx[num]) + if (!adev_ctx || !adev_ctx[num] || !adev_ctx[num]->mixer_elm) return; - if (snd_mixer_selem_has_playback_switch (dev_ctx[num]->mixer_elm)) { - snd_mixer_selem_get_playback_switch (dev_ctx[num]->mixer_elm, SND_MIXER_SCHN_FRONT_LEFT, &mute); - snd_mixer_selem_get_playback_switch (dev_ctx[num]->mixer_elm, SND_MIXER_SCHN_FRONT_RIGHT, &mute); + if (snd_mixer_selem_has_playback_switch (adev_ctx[num]->mixer_elm)) { + snd_mixer_selem_get_playback_switch (adev_ctx[num]->mixer_elm, SND_MIXER_SCHN_FRONT_LEFT, &mute); + snd_mixer_selem_get_playback_switch (adev_ctx[num]->mixer_elm, SND_MIXER_SCHN_FRONT_RIGHT, &mute); } @@ -165,25 +167,25 @@ PUBLIC unsigned char _alsa_get_mute (unsigned int num) { PUBLIC void _alsa_set_mute (unsigned int num, unsigned char mute) { - if (!dev_ctx || !dev_ctx[num] || 1 < mute < 0) + if (!adev_ctx || !adev_ctx[num] || !adev_ctx[num]->mixer_elm || 1 < mute < 0) return; - if (snd_mixer_selem_has_playback_switch (dev_ctx[num]->mixer_elm)) - snd_mixer_selem_set_playback_switch_all (dev_ctx[num]->mixer_elm, !mute); + if (snd_mixer_selem_has_playback_switch (adev_ctx[num]->mixer_elm)) + snd_mixer_selem_set_playback_switch_all (adev_ctx[num]->mixer_elm, !mute); } PUBLIC void _alsa_set_rate (unsigned int num, unsigned int rate) { - if (!dev_ctx || !dev_ctx[num]) + if (!adev_ctx || !adev_ctx[num]) return; - snd_pcm_hw_params_set_rate_near (dev_ctx[num]->dev, dev_ctx[num]->params, &rate, 0); + snd_pcm_hw_params_set_rate_near (adev_ctx[num]->dev, adev_ctx[num]->params, &rate, 0); } PUBLIC void _alsa_set_channels (unsigned int num, unsigned int channels) { - if (!dev_ctx || !dev_ctx[num]) + if (!adev_ctx || !adev_ctx[num]) return; - snd_pcm_hw_params_set_channels (dev_ctx[num]->dev, dev_ctx[num]->params, channels); + snd_pcm_hw_params_set_channels (adev_ctx[num]->dev, adev_ctx[num]->params, channels); } |