+++ /dev/null
-/*
- * Copyright (C) 2015, 2016 "IoT.bzh"
- * Author "Manuel Bachmann"
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- * http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-#include "audio-api.h"
-#include "audio-alsa.h"
-
-snd_mixer_selem_channel_id_t SCHANNELS[8] = {
- SND_MIXER_SCHN_FRONT_LEFT,
- SND_MIXER_SCHN_FRONT_RIGHT,
- SND_MIXER_SCHN_FRONT_CENTER,
- SND_MIXER_SCHN_REAR_LEFT,
- SND_MIXER_SCHN_REAR_RIGHT,
- SND_MIXER_SCHN_REAR_CENTER,
- SND_MIXER_SCHN_SIDE_LEFT,
- SND_MIXER_SCHN_SIDE_RIGHT
-};
-
-static struct dev_ctx_alsa **dev_ctx_a = NULL;
-
-
-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;
- snd_mixer_elem_t *mixer_elm_m;
- unsigned int rate = 22050;
- long vol, vol_min, vol_max;
- int num, i;
-
- if (snd_pcm_open (&dev, name, SND_PCM_STREAM_PLAYBACK, 0) < 0) {
- fprintf (stderr, "ALSA backend could not open card '%s'\n", name);
- return 0;
- }
-
- snd_pcm_hw_params_malloc (¶ms);
- 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, &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);
- fprintf (stderr, "ALSA backend could set channels on card '%s'\n", name);
- return 0;
- }
- snd_pcm_prepare (dev);
-
- snd_mixer_open (&mixer, 0);
- if (snd_mixer_attach (mixer, name) < 0) {
- snd_pcm_hw_params_free (params);
- fprintf (stderr, "ALSA backend could not open mixer for card '%s'\n", name);
- 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);
- mixer_elm_m = NULL;
-
- if (!mixer_elm) {
- /* no "Master" mixer ; we are probably on a board... search ! */
- for (mixer_elm = snd_mixer_first_elem (mixer); mixer_elm != NULL;
- mixer_elm = snd_mixer_elem_next (mixer_elm)) {
- if (snd_mixer_elem_info (mixer_elm) < 0)
- continue;
- snd_mixer_selem_get_id (mixer_elm, mixer_sid);
- if (strstr (snd_mixer_selem_id_get_name (mixer_sid), "DVC Out")) {
-
- /* this is Porter... let us found the specific mute switch */
- snd_mixer_selem_id_set_index (mixer_sid, 0);
- snd_mixer_selem_id_set_name (mixer_sid, "DVC Out Mute");
- mixer_elm_m = snd_mixer_find_selem (mixer, mixer_sid);
-
- break;
- }
- }
- }
-
- 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_a) {
- dev_ctx_a = (dev_ctx_alsa_T**) malloc (sizeof(dev_ctx_alsa_T*));
- dev_ctx_a[0] = (dev_ctx_alsa_T*) malloc (sizeof(dev_ctx_alsa_T));
- dev_ctx_a[0]->name = NULL;
- dev_ctx_a[0]->dev = NULL;
- }
-
- /* is a card with similar name already opened ? */
- for (num = 0; num < (sizeof(dev_ctx_a)/sizeof(dev_ctx_alsa_T*)); num++) {
- if (dev_ctx_a[num]->name &&
- !strcmp (dev_ctx_a[num]->name, name)) {
- fprintf (stderr, "Card '%s' already locked by other ALSA backend session\n", name);
- return 0;
- }
- }
- num--;
-
- /* it's not... let us add it to the global array */
- dev_ctx_a = (dev_ctx_alsa_T**) realloc (dev_ctx_a, (num+1)*sizeof(dev_ctx_alsa_T*));
- if (!dev_ctx_a[num])
- dev_ctx_a[num] = (dev_ctx_alsa_T*) malloc (sizeof(dev_ctx_alsa_T));
- dev_ctx_a[num]->name = strdup (name);
- dev_ctx_a[num]->dev = dev;
- dev_ctx_a[num]->params = params;
- dev_ctx_a[num]->mixer_elm = mixer_elm;
- dev_ctx_a[num]->mixer_elm_m = mixer_elm_m;
- dev_ctx_a[num]->vol_max = vol_max;
- dev_ctx_a[num]->vol = vol;
- dev_ctx_a[num]->thr_should_run = 0;
- dev_ctx_a[num]->thr_finished = 0;
-
- /* make the client context aware of current card state */
- for (i = 0; i < 8; i++)
- ctx->volume[i] = _alsa_get_volume (num, i);
- ctx->mute = _alsa_get_mute (num);
- ctx->idx = num;
- ctx->name = strdup (name);
-
- fprintf (stderr, "Successfully initialized ALSA backend.\n");
-
- return 1;
-}
-
-void _alsa_free (const char *name) {
-
- int num;
-
- for (num = 0; num < (sizeof(dev_ctx_a)/sizeof(dev_ctx_alsa_T*)); num++) {
- if (dev_ctx_a[num]->name &&
- !strcmp (dev_ctx_a[num]->name, name)) {
- snd_pcm_close (dev_ctx_a[num]->dev);
- snd_pcm_hw_params_free (dev_ctx_a[num]->params);
- free (dev_ctx_a[num]->name);
- dev_ctx_a[num]->dev = NULL;
- dev_ctx_a[num]->name = NULL;
- free (dev_ctx_a[num]);
- return;
- }
- }
-}
-
-void _alsa_play (int num) {
-
- if (!dev_ctx_a || !dev_ctx_a[num] || dev_ctx_a[num]->thr_should_run ||
- access (AUDIO_BUFFER, F_OK) == -1)
- return;
-
- dev_ctx_a[num]->thr_should_run = 1;
- dev_ctx_a[num]->thr_finished = 0;
- pthread_create (&dev_ctx_a[num]->thr, NULL, _alsa_play_thread_fn, (void*)dev_ctx_a[num]);
-}
-
-void _alsa_stop (int num) {
-
- if (!dev_ctx_a || !dev_ctx_a[num] || !dev_ctx_a[num]->thr_should_run)
- return;
-
- /* stop the "while" loop in thread */
- dev_ctx_a[num]->thr_should_run = 0;
-
- while (!dev_ctx_a[num]->thr_finished)
- usleep(100000);
-
- pthread_join (dev_ctx_a[num]->thr, NULL);
-}
-
-unsigned int _alsa_get_volume (int num, unsigned int channel) {
-
- if (!dev_ctx_a || !dev_ctx_a[num] || !dev_ctx_a[num]->mixer_elm)
- return 0;
-
- snd_mixer_selem_get_playback_volume (dev_ctx_a[num]->mixer_elm, SCHANNELS[channel], &dev_ctx_a[num]->vol);
-
- return (unsigned int)(dev_ctx_a[num]->vol*100)/dev_ctx_a[num]->vol_max;
-}
-
-void _alsa_set_volume (int num, unsigned int channel, unsigned int vol) {
-
- if (!dev_ctx_a || !dev_ctx_a[num] || !dev_ctx_a[num]->mixer_elm ||
- vol > 100)
- return;
-
- snd_mixer_selem_set_playback_volume (dev_ctx_a[num]->mixer_elm, SCHANNELS[channel], (vol*dev_ctx_a[num]->vol_max)/100);
-}
-
-void _alsa_set_volume_all (int num, unsigned int vol) {
-
- if (!dev_ctx_a || !dev_ctx_a[num] || !dev_ctx_a[num]->mixer_elm ||
- vol > 100)
-
- fflush (stdout); /* seems to force this logic to apply quickly */
- snd_mixer_selem_set_playback_volume_all (dev_ctx_a[num]->mixer_elm, (vol*dev_ctx_a[num]->vol_max)/100);
-}
-
-unsigned char _alsa_get_mute (int num) {
-
- int mute = 0;
- snd_mixer_elem_t *elm_m;
-
- if (!dev_ctx_a || !dev_ctx_a[num] || !dev_ctx_a[num]->mixer_elm)
- return 0;
-
- dev_ctx_a[num]->mixer_elm_m ? (elm_m = dev_ctx_a[num]->mixer_elm_m) :
- (elm_m = dev_ctx_a[num]->mixer_elm);
-
- if (snd_mixer_selem_has_playback_switch (elm_m)) {
- snd_mixer_selem_get_playback_switch (elm_m, SND_MIXER_SCHN_FRONT_LEFT, &mute);
- snd_mixer_selem_get_playback_switch (elm_m, SND_MIXER_SCHN_FRONT_RIGHT, &mute);
- }
-
- if (dev_ctx_a[num]->mixer_elm_m)
- return (unsigned char)mute;
- else
- return (unsigned char)!mute;
-}
-
-void _alsa_set_mute (int num, unsigned char tomute) {
-
- snd_mixer_elem_t *elm_m;
- int mute;
-
- if (!dev_ctx_a || !dev_ctx_a[num] || !dev_ctx_a[num]->mixer_elm || 1 < tomute)
- return;
-
- if (dev_ctx_a[num]->mixer_elm_m) {
- elm_m = dev_ctx_a[num]->mixer_elm_m;
- mute = (int)!tomute;
- } else {
- elm_m = dev_ctx_a[num]->mixer_elm;
- mute = (int)tomute;
- }
-
- if (snd_mixer_selem_has_playback_switch (elm_m))
- snd_mixer_selem_set_playback_switch_all (elm_m, !mute);
-}
-
-void _alsa_set_rate (int num, unsigned int rate) {
-
- if (!dev_ctx_a || !dev_ctx_a[num])
- return;
-
- snd_pcm_hw_params_set_rate_near (dev_ctx_a[num]->dev, dev_ctx_a[num]->params, &rate, 0);
-}
-
-void _alsa_set_channels (int num, unsigned int channels) {
-
- if (!dev_ctx_a || !dev_ctx_a[num])
- return;
-
- snd_pcm_hw_params_set_channels (dev_ctx_a[num]->dev, dev_ctx_a[num]->params, channels);
-}
-
- /* ---- LOCAL THREADED FUNCTIONS ---- */
-
-void* _alsa_play_thread_fn (void *ctx) {
-
- dev_ctx_alsa_T *dev_ctx_a = (dev_ctx_alsa_T *)ctx;
- FILE *file = NULL;
- char *buf = NULL;
- long size;
- int frames, res;
-
- file = fopen (AUDIO_BUFFER, "rb");
-
- while (dev_ctx_a->thr_should_run && file && (access (AUDIO_BUFFER, F_OK) != -1) ) {
- fseek (file, 0, SEEK_END);
- size = ftell (file);
- buf = (char*) realloc (buf, size * sizeof(char));
- frames = (size * sizeof(char)) / 4;
-
- fseek (file, 0, SEEK_SET);
- fread (buf, 1, size, file);
- fflush (file);
-
- if ((res = snd_pcm_writei (dev_ctx_a->dev, buf, frames)) != frames) {
- snd_pcm_recover (dev_ctx_a->dev, res, 0);
- snd_pcm_prepare (dev_ctx_a->dev);
- }
- /* snd_pcm_drain (dev_ctx->dev); */
- }
- if (buf) free(buf);
- if (file) fclose(file);
-
- dev_ctx_a->thr_finished = 1;
- return 0;
-}
Code Review / src / app-framework-binder.git / blobdiff