diff options
Diffstat (limited to 'drumgizmo/output/alsa.cc')
| -rw-r--r-- | drumgizmo/output/alsa.cc | 54 |
1 files changed, 32 insertions, 22 deletions
diff --git a/drumgizmo/output/alsa.cc b/drumgizmo/output/alsa.cc index c577c72..8e6e4a9 100644 --- a/drumgizmo/output/alsa.cc +++ b/drumgizmo/output/alsa.cc @@ -35,11 +35,15 @@ struct AlsaInitError int const code; const std::string msg; - AlsaInitError(int op_code, const std::string &msg) : code{code}, msg{msg} {} + AlsaInitError(int op_code, const std::string& msg) + : code{code} + , msg{msg} + { + } - static inline void test(int code, const std::string &msg) + static inline void test(int code, const std::string& msg) { - if (code < 0) + if(code < 0) { throw AlsaInitError(code, msg); } @@ -61,7 +65,7 @@ AlsaOutputEngine::~AlsaOutputEngine() { // note: do NOT release `params`, it was allocated by `alloca()` - if (handle != nullptr) + if(handle != nullptr) { snd_pcm_close(handle); } @@ -72,10 +76,11 @@ bool AlsaOutputEngine::init(Channels channels) // try to initialize alsa try { - int value = snd_pcm_open(&handle, dev.c_str(), SND_PCM_STREAM_PLAYBACK, 0); + int value = + snd_pcm_open(&handle, dev.c_str(), SND_PCM_STREAM_PLAYBACK, 0); AlsaInitError::test(value, "snd_pcm_open"); num_channels = channels.size(); - if (handle == nullptr) + if(handle == nullptr) { std::cerr << "[AlsaOutputEngine] Failed to acquire " << "hardware handle\n"; @@ -86,21 +91,23 @@ bool AlsaOutputEngine::init(Channels channels) value = snd_pcm_hw_params_any(handle, params); AlsaInitError::test(value, "snd_pcm_hw_params_any"); - value = snd_pcm_hw_params_set_access(handle, params, - SND_PCM_ACCESS_RW_INTERLEAVED); + value = snd_pcm_hw_params_set_access( + handle, params, SND_PCM_ACCESS_RW_INTERLEAVED); AlsaInitError::test(value, "snd_pcm_hw_params_set_access"); - value = snd_pcm_hw_params_set_format(handle, params, SND_PCM_FORMAT_FLOAT); + value = + snd_pcm_hw_params_set_format(handle, params, SND_PCM_FORMAT_FLOAT); AlsaInitError::test(value, "snd_pcm_hw_params_set_format"); value = snd_pcm_hw_params_set_channels(handle, params, num_channels); AlsaInitError::test(value, "snd_pcm_hw_params_set_channels"); value = snd_pcm_hw_params_set_rate_near(handle, params, &srate, 0); AlsaInitError::test(value, "snd_pcm_hw_params_set_rate_near"); - value = snd_pcm_hw_params_set_period_size_near(handle, params, &frames, 0); + value = + snd_pcm_hw_params_set_period_size_near(handle, params, &frames, 0); AlsaInitError::test(value, "snd_pcm_hw_params_set_period_size_near"); value = snd_pcm_hw_params(handle, params); AlsaInitError::test(value, "snd_pcm_hw_params"); } - catch (AlsaInitError const &error) + catch(AlsaInitError const& error) { std::cerr << "[AlsaOutputEngine] " << error.msg << " failed: " << snd_strerror(error.code) << std::endl; @@ -115,42 +122,45 @@ bool AlsaOutputEngine::init(Channels channels) void AlsaOutputEngine::setParm(std::string parm, std::string value) { - if (parm == "dev") + if(parm == "dev") { // apply hardware device name dev = value; } - else if (parm == "frames") + else if(parm == "frames") { // try to apply hardware buffer size try { frames = std::stoi(value); } - catch (...) + catch(...) { - std::cerr << "[AlsaOutputEngine] Invalid buffer size " << value << "\n"; + std::cerr << "[AlsaOutputEngine] Invalid buffer size " << value + << "\n"; } } - else if (parm == "srate") + else if(parm == "srate") { try { srate = std::stoi(value); } - catch (...) + catch(...) { - std::cerr << "[AlsaOutputEngine] Invalid samplerate " << value << "\n"; + std::cerr << "[AlsaOutputEngine] Invalid samplerate " << value + << "\n"; } } else { - std::cerr << "[AlsaOutputEngine] Unsupported parameter '" << parm << "'\n"; + std::cerr << "[AlsaOutputEngine] Unsupported parameter '" << parm + << "'\n"; } } bool AlsaOutputEngine::start() -{ +{ return true; } @@ -162,10 +172,10 @@ void AlsaOutputEngine::pre(size_t nsamples) { } -void AlsaOutputEngine::run(int ch, sample_t *samples, size_t nsamples) +void AlsaOutputEngine::run(int ch, sample_t* samples, size_t nsamples) { // Write channel data in interleaved buffer - for (auto i = 0u; i < nsamples; ++i) + for(auto i = 0u; i < nsamples; ++i) { data[i * num_channels + ch] = samples[i]; } |