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Diffstat (limited to 'plugins/audio/audio-alsa.c')
-rw-r--r--plugins/audio/audio-alsa.c100
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);
}