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/*
* Copyright (c) 2013-2014, The Linux Foundation. All rights reserved.
* Not a Contribution.
*
* Copyright (C) 2013 The Android Open Source Project
*
* 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.
*/
#define LOG_TAG "audio_hw_fm"
/*#define LOG_NDEBUG 0*/
#define LOG_NDDEBUG 0
#include <errno.h>
#include <math.h>
#include <cutils/log.h>
#include "audio_hw.h"
#include "platform.h"
#include "platform_api.h"
#include <stdlib.h>
#include <cutils/str_parms.h>
#ifdef FM_ENABLED
#define AUDIO_PARAMETER_KEY_HANDLE_FM "handle_fm"
#define AUDIO_PARAMETER_KEY_FM_VOLUME "fm_volume"
#define AUDIO_PARAMETER_KEY_REC_PLAY_CONC "rec_play_conc_on"
static struct pcm_config pcm_config_fm = {
.channels = 2,
.rate = 48000,
.period_size = 256,
.period_count = 4,
.format = PCM_FORMAT_S16_LE,
.start_threshold = 0,
.stop_threshold = INT_MAX,
.avail_min = 0,
};
struct fm_module {
struct pcm *fm_pcm_rx;
struct pcm *fm_pcm_tx;
bool is_fm_running;
float fm_volume;
bool restart_fm;
int scard_state;
};
static struct fm_module fmmod = {
.fm_pcm_rx = NULL,
.fm_pcm_tx = NULL,
.fm_volume = 0,
.is_fm_running = 0,
.restart_fm = 0,
.scard_state = SND_CARD_STATE_ONLINE,
};
static int32_t fm_set_volume(struct audio_device *adev, float value)
{
int32_t vol, ret = 0;
struct mixer_ctl *ctl;
const char *mixer_ctl_name = FM_RX_VOLUME;
ALOGV("%s: entry", __func__);
ALOGD("%s: (%f)\n", __func__, value);
if (value < 0.0) {
ALOGW("%s: (%f) Under 0.0, assuming 0.0\n", __func__, value);
value = 0.0;
} else if (value > 1.0) {
ALOGW("%s: (%f) Over 1.0, assuming 1.0\n", __func__, value);
value = 1.0;
}
vol = lrint((value * 0x2000) + 0.5);
fmmod.fm_volume = value;
if (!fmmod.is_fm_running) {
ALOGV("%s: FM not active, ignoring set_fm_volume call", __func__);
return -EIO;
}
ALOGD("%s: Setting FM volume to %d \n", __func__, vol);
ctl = mixer_get_ctl_by_name(adev->mixer, mixer_ctl_name);
if (!ctl) {
ALOGE("%s: Could not get ctl for mixer cmd - %s",
__func__, mixer_ctl_name);
return -EINVAL;
}
mixer_ctl_set_value(ctl, 0, vol);
ALOGV("%s: exit", __func__);
return ret;
}
static int32_t fm_stop(struct audio_device *adev)
{
int32_t i, ret = 0;
struct audio_usecase *uc_info;
ALOGD("%s: enter", __func__);
fmmod.is_fm_running = false;
/* 1. Close the PCM devices */
if (fmmod.fm_pcm_rx) {
pcm_close(fmmod.fm_pcm_rx);
fmmod.fm_pcm_rx = NULL;
}
if (fmmod.fm_pcm_tx) {
pcm_close(fmmod.fm_pcm_tx);
fmmod.fm_pcm_tx = NULL;
}
uc_info = get_usecase_from_list(adev, USECASE_AUDIO_PLAYBACK_FM);
if (uc_info == NULL) {
ALOGE("%s: Could not find the usecase (%d) in the list",
__func__, USECASE_VOICE_CALL);
return -EINVAL;
}
/* 2. Get and set stream specific mixer controls */
disable_audio_route(adev, uc_info);
/* 3. Disable the rx and tx devices */
disable_snd_device(adev, uc_info->out_snd_device);
disable_snd_device(adev, uc_info->in_snd_device);
list_remove(&uc_info->list);
free(uc_info);
ALOGD("%s: exit: status(%d)", __func__, ret);
return ret;
}
static int32_t fm_start(struct audio_device *adev)
{
int32_t i, ret = 0;
struct audio_usecase *uc_info;
int32_t pcm_dev_rx_id, pcm_dev_tx_id;
ALOGD("%s: enter", __func__);
uc_info = (struct audio_usecase *)calloc(1, sizeof(struct audio_usecase));
if (!uc_info)
return -ENOMEM;
uc_info->id = USECASE_AUDIO_PLAYBACK_FM;
uc_info->type = PCM_PLAYBACK;
uc_info->stream.out = adev->primary_output;
uc_info->devices = adev->primary_output->devices;
uc_info->in_snd_device = SND_DEVICE_NONE;
uc_info->out_snd_device = SND_DEVICE_NONE;
list_add_tail(&adev->usecase_list, &uc_info->list);
select_devices(adev, USECASE_AUDIO_PLAYBACK_FM);
pcm_dev_rx_id = platform_get_pcm_device_id(uc_info->id, PCM_PLAYBACK);
pcm_dev_tx_id = platform_get_pcm_device_id(uc_info->id, PCM_CAPTURE);
if (pcm_dev_rx_id < 0 || pcm_dev_tx_id < 0) {
ALOGE("%s: Invalid PCM devices (rx: %d tx: %d) for the usecase(%d)",
__func__, pcm_dev_rx_id, pcm_dev_tx_id, uc_info->id);
ret = -EIO;
goto exit;
}
ALOGV("%s: FM PCM devices (rx: %d tx: %d) for the usecase(%d)",
__func__, pcm_dev_rx_id, pcm_dev_tx_id, uc_info->id);
ALOGV("%s: Opening PCM playback device card_id(%d) device_id(%d)",
__func__, adev->snd_card, pcm_dev_rx_id);
fmmod.fm_pcm_rx = pcm_open(adev->snd_card,
pcm_dev_rx_id,
PCM_OUT, &pcm_config_fm);
if (fmmod.fm_pcm_rx && !pcm_is_ready(fmmod.fm_pcm_rx)) {
ALOGE("%s: %s", __func__, pcm_get_error(fmmod.fm_pcm_rx));
ret = -EIO;
goto exit;
}
ALOGV("%s: Opening PCM capture device card_id(%d) device_id(%d)",
__func__, adev->snd_card, pcm_dev_tx_id);
fmmod.fm_pcm_tx = pcm_open(adev->snd_card,
pcm_dev_tx_id,
PCM_IN, &pcm_config_fm);
if (fmmod.fm_pcm_tx && !pcm_is_ready(fmmod.fm_pcm_tx)) {
ALOGE("%s: %s", __func__, pcm_get_error(fmmod.fm_pcm_tx));
ret = -EIO;
goto exit;
}
pcm_start(fmmod.fm_pcm_rx);
pcm_start(fmmod.fm_pcm_tx);
fmmod.is_fm_running = true;
fm_set_volume(adev, fmmod.fm_volume);
ALOGD("%s: exit: status(%d)", __func__, ret);
return 0;
exit:
fm_stop(adev);
ALOGE("%s: Problem in FM start: status(%d)", __func__, ret);
return ret;
}
void audio_extn_fm_set_parameters(struct audio_device *adev,
struct str_parms *parms)
{
int ret, val;
char value[32]={0};
float vol =0.0;
ALOGV("%s: enter", __func__);
ret = str_parms_get_str(parms, "SND_CARD_STATUS", value, sizeof(value));
if (ret >= 0) {
char *snd_card_status = value+2;
if (strstr(snd_card_status, "OFFLINE")) {
fmmod.scard_state = SND_CARD_STATE_OFFLINE;
}
else if (strstr(snd_card_status, "ONLINE")) {
fmmod.scard_state = SND_CARD_STATE_ONLINE;
}
}
if(fmmod.is_fm_running) {
if (fmmod.scard_state == SND_CARD_STATE_OFFLINE) {
ALOGD("sound card is OFFLINE, stop FM");
fm_stop(adev);
fmmod.restart_fm = 1;
}
ret = str_parms_get_str(parms, AUDIO_PARAMETER_STREAM_ROUTING,
value, sizeof(value));
if (ret >= 0) {
val = atoi(value);
if(val > 0)
select_devices(adev, USECASE_AUDIO_PLAYBACK_FM);
}
}
if (fmmod.restart_fm && (fmmod.scard_state == SND_CARD_STATE_ONLINE)) {
ALOGD("sound card is ONLINE, restart FM");
fmmod.restart_fm = 0;
fm_start(adev);
}
ret = str_parms_get_str(parms, AUDIO_PARAMETER_KEY_HANDLE_FM,
value, sizeof(value));
if (ret >= 0) {
val = atoi(value);
ALOGD("%s: FM usecase", __func__);
if (val != 0) {
if(val & AUDIO_DEVICE_OUT_FM
&& fmmod.is_fm_running == false) {
adev->primary_output->devices = val & ~AUDIO_DEVICE_OUT_FM;
fm_start(adev);
} else if (!(val & AUDIO_DEVICE_OUT_FM)
&& fmmod.is_fm_running == true)
fm_stop(adev);
}
}
memset(value, 0, sizeof(value));
ret = str_parms_get_str(parms, AUDIO_PARAMETER_KEY_FM_VOLUME,
value, sizeof(value));
if (ret >= 0) {
if (sscanf(value, "%f", &vol) != 1){
ALOGE("%s: error in retrieving fm volume", __func__);
ret = -EIO;
goto exit;
}
ALOGD("%s: set_fm_volume usecase", __func__);
fm_set_volume(adev, vol);
}
#ifdef RECORD_PLAY_CONCURRENCY
ret = str_parms_get_str(parms, AUDIO_PARAMETER_KEY_REC_PLAY_CONC,
value, sizeof(value));
if ((ret >= 0)
&& (fmmod.is_fm_running == true)) {
if (!strncmp("true", value, sizeof("true")))
ALOGD("Record play concurrency ON Forcing FM device reroute");
else
ALOGD("Record play concurrency OFF Forcing FM device reroute");
select_devices(adev, USECASE_AUDIO_PLAYBACK_FM);
fm_set_volume(adev,fmmod.fm_volume);
}
#endif
exit:
ALOGV("%s: exit", __func__);
}
#endif /* FM_ENABLED end */
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