diff options
Diffstat (limited to 'drumgizmo/output/alsa.cc')
| -rw-r--r-- | drumgizmo/output/alsa.cc | 31 |
1 files changed, 25 insertions, 6 deletions
diff --git a/drumgizmo/output/alsa.cc b/drumgizmo/output/alsa.cc index f1a6806..14a9c6d 100644 --- a/drumgizmo/output/alsa.cc +++ b/drumgizmo/output/alsa.cc @@ -24,6 +24,8 @@ * along with DrumGizmo; if not, write to the Free Software * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA. */ +#include <iostream> + #include "alsa.h" int const BUFFER_SIZE = 40960; @@ -55,7 +57,7 @@ AlsaOutputEngine::AlsaOutputEngine() } AlsaOutputEngine::~AlsaOutputEngine() { - // note: cannot release `params` (seg fault but why?) + // note: do NOT release `params`, it was allocated by `alloca()` if (handle != nullptr) { snd_pcm_close(handle); @@ -69,7 +71,8 @@ bool AlsaOutputEngine::init(Channels channels) { AlsaInitError::test(value, "snd_pcm_open"); num_channels = channels.size(); if (handle == nullptr) { - printf("No handle!\n"); + std::cerr << "[AlsaOutputEngine] Failed to acquire " + << "hardware handle\n"; return false; } // Allocate and init a hardware parameters object @@ -91,8 +94,8 @@ bool AlsaOutputEngine::init(Channels channels) { AlsaInitError::test(value, "snd_pcm_hw_params"); } catch (AlsaInitError const & error) { - printf("%s failed: %s\n", error.msg.c_str(), snd_strerror(error.code)); - fflush(stdout); + std::cerr << "[AlsaOutputEngine] " << error.msg << " failed: " + << snd_strerror(error.code) << std::endl; return false; } @@ -104,11 +107,27 @@ bool AlsaOutputEngine::init(Channels channels) { void AlsaOutputEngine::setParm(std::string parm, std::string value) { if (parm == "dev") { + // apply hardware device name dev = value; + } else if (parm == "frames") { - frames = std::stoi(value); + // try to apply hardware buffer size + try { + frames = std::stoi(value); + } catch (...) { + std::cerr << "[AlsaOutputEngine] Invalid buffer size " + << value << "\n"; + } } else if (parm == "srate") { - srate = std::stoi(value); + try { + srate = std::stoi(value); + } catch (...) { + std::cerr << "[AlsaOutputEngine] Invalid samplerate " + << value << "\n"; + } + } else { + std::cerr << "[AlsaOutputEngine] Unsupported parameter '" + << parm << "'\n"; } } |