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authorMarcelo Fernandez <marcelofg55@gmail.com>2018-03-25 00:43:51 -0300
committerMarcelo Fernandez <marcelofg55@gmail.com>2018-03-26 17:41:05 -0300
commitecc1b34cbc2375a57afad822218324d8b88fa721 (patch)
tree7c3272e5609be259398f9bdf3549b4f9a5b84be3 /drivers/alsa
parentfd79de01c20168075dbf425831ac44f2b676f275 (diff)
Added new audio device functions to set/get the audio device
Diffstat (limited to 'drivers/alsa')
-rw-r--r--drivers/alsa/audio_driver_alsa.cpp143
-rw-r--r--drivers/alsa/audio_driver_alsa.h13
2 files changed, 129 insertions, 27 deletions
diff --git a/drivers/alsa/audio_driver_alsa.cpp b/drivers/alsa/audio_driver_alsa.cpp
index 0bb03d23ea..1e17e72532 100644
--- a/drivers/alsa/audio_driver_alsa.cpp
+++ b/drivers/alsa/audio_driver_alsa.cpp
@@ -37,19 +37,20 @@
#include <errno.h>
-Error AudioDriverALSA::init() {
-
- active = false;
- thread_exited = false;
- exit_thread = false;
- pcm_open = false;
- samples_in = NULL;
- samples_out = NULL;
-
+Error AudioDriverALSA::init_device() {
mix_rate = GLOBAL_DEF("audio/mix_rate", DEFAULT_MIX_RATE);
speaker_mode = SPEAKER_MODE_STEREO;
channels = 2;
+ // If there is a specified device check that it is really present
+ if (device_name != "Default") {
+ Array list = get_device_list();
+ if (list.find(device_name) == -1) {
+ device_name = "Default";
+ new_device = "Default";
+ }
+ }
+
int status;
snd_pcm_hw_params_t *hwparams;
snd_pcm_sw_params_t *swparams;
@@ -65,7 +66,16 @@ Error AudioDriverALSA::init() {
//6 chans - "plug:surround51"
//4 chans - "plug:surround40";
- status = snd_pcm_open(&pcm_handle, "default", SND_PCM_STREAM_PLAYBACK, SND_PCM_NONBLOCK);
+ if (device_name == "Default") {
+ status = snd_pcm_open(&pcm_handle, "default", SND_PCM_STREAM_PLAYBACK, SND_PCM_NONBLOCK);
+ } else {
+ String device = device_name;
+ int pos = device.find(";");
+ if (pos != -1) {
+ device = device.substr(0, pos);
+ }
+ status = snd_pcm_open(&pcm_handle, device.utf8().get_data(), SND_PCM_STREAM_PLAYBACK, SND_PCM_NONBLOCK);
+ }
ERR_FAIL_COND_V(status < 0, ERR_CANT_OPEN);
@@ -129,15 +139,28 @@ Error AudioDriverALSA::init() {
status = snd_pcm_sw_params(pcm_handle, swparams);
CHECK_FAIL(status < 0);
- samples_in = memnew_arr(int32_t, period_size * channels);
- samples_out = memnew_arr(int16_t, period_size * channels);
+ samples_in.resize(period_size * channels);
+ samples_out.resize(period_size * channels);
snd_pcm_nonblock(pcm_handle, 0);
- mutex = Mutex::create();
- thread = Thread::create(AudioDriverALSA::thread_func, this);
-
return OK;
+}
+
+Error AudioDriverALSA::init() {
+
+ active = false;
+ thread_exited = false;
+ exit_thread = false;
+ pcm_open = false;
+
+ Error err = init_device();
+ if (err == OK) {
+ mutex = Mutex::create();
+ thread = Thread::create(AudioDriverALSA::thread_func, this);
+ }
+
+ return err;
};
void AudioDriverALSA::thread_func(void *p_udata) {
@@ -152,7 +175,7 @@ void AudioDriverALSA::thread_func(void *p_udata) {
} else {
ad->lock();
- ad->audio_server_process(ad->period_size, ad->samples_in);
+ ad->audio_server_process(ad->period_size, ad->samples_in.ptrw());
ad->unlock();
@@ -167,7 +190,7 @@ void AudioDriverALSA::thread_func(void *p_udata) {
while (todo) {
if (ad->exit_thread)
break;
- uint8_t *src = (uint8_t *)ad->samples_out;
+ uint8_t *src = (uint8_t *)ad->samples_out.ptr();
int wrote = snd_pcm_writei(ad->pcm_handle, (void *)(src + (total * ad->channels)), todo);
if (wrote < 0) {
@@ -193,6 +216,26 @@ void AudioDriverALSA::thread_func(void *p_udata) {
total += wrote;
todo -= wrote;
};
+
+ // User selected a new device, finish the current one so we'll init the new device
+ if (ad->device_name != ad->new_device) {
+ ad->device_name = ad->new_device;
+ ad->finish_device();
+
+ Error err = ad->init_device();
+ if (err != OK) {
+ ERR_PRINT("ALSA: init_device error");
+ ad->device_name = "Default";
+ ad->new_device = "Default";
+
+ err = ad->init_device();
+ if (err != OK) {
+ ad->active = false;
+ ad->exit_thread = true;
+ break;
+ }
+ }
+ }
};
ad->thread_exited = true;
@@ -213,6 +256,49 @@ AudioDriver::SpeakerMode AudioDriverALSA::get_speaker_mode() const {
return speaker_mode;
};
+Array AudioDriverALSA::get_device_list() {
+
+ Array list;
+
+ list.push_back("Default");
+
+ void **hints;
+
+ if (snd_device_name_hint(-1, "pcm", &hints) < 0)
+ return list;
+
+ for (void **n = hints; *n != NULL; n++) {
+ char *name = snd_device_name_get_hint(*n, "NAME");
+ char *desc = snd_device_name_get_hint(*n, "DESC");
+
+ if (name != NULL && !strncmp(name, "plughw", 6)) {
+ if (desc) {
+ list.push_back(String(name) + ";" + String(desc));
+ } else {
+ list.push_back(String(name));
+ }
+ }
+
+ if (desc != NULL)
+ free(desc);
+ if (name != NULL)
+ free(name);
+ }
+ snd_device_name_free_hint(hints);
+
+ return list;
+}
+
+String AudioDriverALSA::get_device() {
+
+ return device_name;
+}
+
+void AudioDriverALSA::set_device(String device) {
+
+ new_device = device;
+}
+
void AudioDriverALSA::lock() {
if (!thread || !mutex)
@@ -227,6 +313,14 @@ void AudioDriverALSA::unlock() {
mutex->unlock();
};
+void AudioDriverALSA::finish_device() {
+
+ if (pcm_open) {
+ snd_pcm_close(pcm_handle);
+ pcm_open = NULL;
+ }
+}
+
void AudioDriverALSA::finish() {
if (!thread)
@@ -235,17 +329,13 @@ void AudioDriverALSA::finish() {
exit_thread = true;
Thread::wait_to_finish(thread);
- if (pcm_open)
- snd_pcm_close(pcm_handle);
-
- if (samples_in) {
- memdelete_arr(samples_in);
- memdelete_arr(samples_out);
- };
+ finish_device();
memdelete(thread);
- if (mutex)
+ if (mutex) {
memdelete(mutex);
+ mutex = NULL;
+ }
thread = NULL;
};
@@ -254,6 +344,9 @@ AudioDriverALSA::AudioDriverALSA() {
mutex = NULL;
thread = NULL;
pcm_handle = NULL;
+
+ device_name = "Default";
+ new_device = "Default";
};
AudioDriverALSA::~AudioDriverALSA(){
diff --git a/drivers/alsa/audio_driver_alsa.h b/drivers/alsa/audio_driver_alsa.h
index 8ed60dfdc7..2878e100a2 100644
--- a/drivers/alsa/audio_driver_alsa.h
+++ b/drivers/alsa/audio_driver_alsa.h
@@ -44,8 +44,14 @@ class AudioDriverALSA : public AudioDriver {
snd_pcm_t *pcm_handle;
- int32_t *samples_in;
- int16_t *samples_out;
+ String device_name;
+ String new_device;
+
+ Vector<int32_t> samples_in;
+ Vector<int16_t> samples_out;
+
+ Error init_device();
+ void finish_device();
static void thread_func(void *p_udata);
@@ -71,6 +77,9 @@ public:
virtual void start();
virtual int get_mix_rate() const;
virtual SpeakerMode get_speaker_mode() const;
+ virtual Array get_device_list();
+ virtual String get_device();
+ virtual void set_device(String device);
virtual void lock();
virtual void unlock();
virtual void finish();