X-Git-Url: https://gerrit.automotivelinux.org/gerrit/gitweb?a=blobdiff_plain;f=plugins%2Faudio%2Faudio-alsa.c;h=813d816727a17e7a6b3aae924779216387d7e08f;hb=3bce4a6a8648c91b6ddea478116b3b0679ef4648;hp=8c08c8dbc377359557889f42c1844798414b97cf;hpb=241a06586b3602962874e6d2ac09e258ad6173d2;p=src%2Fapp-framework-binder.git diff --git a/plugins/audio/audio-alsa.c b/plugins/audio/audio-alsa.c index 8c08c8db..813d8167 100644 --- a/plugins/audio/audio-alsa.c +++ b/plugins/audio/audio-alsa.c @@ -1,3 +1,21 @@ +/* + * Copyright (C) 2015 "IoT.bzh" + * Author "Manuel Bachmann" + * + * This program is free software: you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation, either version 3 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program. If not, see . + */ + #include "audio-api.h" #include "audio-alsa.h" @@ -5,6 +23,11 @@ PUBLIC unsigned char _alsa_init (const char *name, audioCtxHandleT *ctx) { snd_pcm_t *dev; snd_pcm_hw_params_t *params; + snd_mixer_t *mixer; + snd_mixer_selem_id_t *mixer_sid; + snd_mixer_elem_t *mixer_elm; + unsigned int rate = 22050; + long vol, vol_min, vol_max; int num; if (snd_pcm_open (&dev, name, SND_PCM_STREAM_PLAYBACK, 0) < 0) @@ -14,35 +37,62 @@ PUBLIC unsigned char _alsa_init (const char *name, audioCtxHandleT *ctx) { snd_pcm_hw_params_any (dev, params); snd_pcm_hw_params_set_access (dev, params, SND_PCM_ACCESS_RW_INTERLEAVED); snd_pcm_hw_params_set_format (dev, params, SND_PCM_FORMAT_S16_LE); - snd_pcm_hw_params_set_rate_near (dev, params, &ctx->rate, 0); + snd_pcm_hw_params_set_rate_near (dev, params, &rate, 0); snd_pcm_hw_params_set_channels (dev, params, ctx->channels); if (snd_pcm_hw_params (dev, params) < 0) { snd_pcm_hw_params_free (params); return 0; } snd_pcm_prepare (dev); - + + snd_mixer_open (&mixer, 0); + if (snd_mixer_attach (mixer, name) < 0) { + snd_pcm_hw_params_free (params); + return 0; + } + snd_mixer_selem_register (mixer, NULL, NULL); + snd_mixer_load (mixer); + + snd_mixer_selem_id_alloca (&mixer_sid); + snd_mixer_selem_id_set_index (mixer_sid, 0); + snd_mixer_selem_id_set_name (mixer_sid, "Master"); + + mixer_elm = snd_mixer_find_selem (mixer, mixer_sid); + 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[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; + 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); + ctx->mute = _alsa_get_mute (num); + ctx->idx = num; return 1; } @@ -51,15 +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; } } @@ -67,16 +117,75 @@ 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 (adev_ctx[num]->dev); */ +} + +PUBLIC unsigned int _alsa_get_volume (unsigned int num) { + + if (!adev_ctx || !adev_ctx[num] || !adev_ctx[num]->mixer_elm) + return; + + snd_mixer_selem_get_playback_volume (adev_ctx[num]->mixer_elm, SND_MIXER_SCHN_FRONT_LEFT, &adev_ctx[num]->vol); + + 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 (!adev_ctx || !adev_ctx[num] || !adev_ctx[num]->mixer_elm || vol > 100) + return; + + 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 (!adev_ctx || !adev_ctx[num] || !adev_ctx[num]->mixer_elm) + return; + + 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); + } - /* snd_pcm_drain (dev_ctx[num]->dev); */ -} \ No newline at end of file + + return (unsigned char)!mute; +} + +PUBLIC void _alsa_set_mute (unsigned int num, unsigned char mute) { + + if (!adev_ctx || !adev_ctx[num] || !adev_ctx[num]->mixer_elm || 1 < mute < 0) + return; + + 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 (!adev_ctx || !adev_ctx[num]) + return; + + 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 (!adev_ctx || !adev_ctx[num]) + return; + + snd_pcm_hw_params_set_channels (adev_ctx[num]->dev, adev_ctx[num]->params, channels); +}