diff options
Diffstat (limited to 'drivers/alsa/audio_driver_alsa.cpp')
| -rw-r--r-- | drivers/alsa/audio_driver_alsa.cpp | 143 |
1 files changed, 118 insertions, 25 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(){ |