diff options
| author | Max Kellermann <max@musicpd.org> | 2017-01-14 21:09:57 +0100 |
|---|---|---|
| committer | Max Kellermann <max@musicpd.org> | 2017-01-14 21:09:57 +0100 |
| commit | 9f8145e590406794446cdb0e69b088dd4719e139 (patch) | |
| tree | f6a7339d59ce0ded3a673ae77bb9c5d13f7fe09a /src/input | |
| parent | 791efc171a35848bb062aad0aee41220cd1f62ba (diff) | |
input/alsa: dump buffer/period sizes
Diffstat (limited to 'src/input')
| -rw-r--r-- | src/input/plugins/AlsaInputPlugin.cxx | 36 |
1 files changed, 36 insertions, 0 deletions
diff --git a/src/input/plugins/AlsaInputPlugin.cxx b/src/input/plugins/AlsaInputPlugin.cxx index c20fddf17..7d8dcca02 100644 --- a/src/input/plugins/AlsaInputPlugin.cxx +++ b/src/input/plugins/AlsaInputPlugin.cxx @@ -324,6 +324,26 @@ ConfigureCapture(snd_pcm_t *capture_handle, throw FormatRuntimeError("Cannot set sample rate (%s)", snd_strerror(err)); + snd_pcm_uframes_t buffer_size_min, buffer_size_max; + snd_pcm_hw_params_get_buffer_size_min(hw_params, &buffer_size_min); + snd_pcm_hw_params_get_buffer_size_max(hw_params, &buffer_size_max); + unsigned buffer_time_min, buffer_time_max; + snd_pcm_hw_params_get_buffer_time_min(hw_params, &buffer_time_min, 0); + snd_pcm_hw_params_get_buffer_time_max(hw_params, &buffer_time_max, 0); + FormatDebug(alsa_input_domain, "buffer: size=%u..%u time=%u..%u", + (unsigned)buffer_size_min, (unsigned)buffer_size_max, + buffer_time_min, buffer_time_max); + + snd_pcm_uframes_t period_size_min, period_size_max; + snd_pcm_hw_params_get_period_size_min(hw_params, &period_size_min, 0); + snd_pcm_hw_params_get_period_size_max(hw_params, &period_size_max, 0); + unsigned period_time_min, period_time_max; + snd_pcm_hw_params_get_period_time_min(hw_params, &period_time_min, 0); + snd_pcm_hw_params_get_period_time_max(hw_params, &period_time_max, 0); + FormatDebug(alsa_input_domain, "period: size=%u..%u time=%u..%u", + (unsigned)period_size_min, (unsigned)period_size_max, + period_time_min, period_time_max); + /* period needs to be big enough so that poll() doesn't fire too often, * but small enough that buffer overruns don't occur if Read() is not * invoked often enough. @@ -341,6 +361,22 @@ ConfigureCapture(snd_pcm_t *capture_handle, throw FormatRuntimeError("Cannot set parameters (%s)", snd_strerror(err)); + snd_pcm_uframes_t alsa_buffer_size; + err = snd_pcm_hw_params_get_buffer_size(hw_params, &alsa_buffer_size); + if (err < 0) + throw FormatRuntimeError("snd_pcm_hw_params_get_buffer_size() failed: %s", + snd_strerror(-err)); + + snd_pcm_uframes_t alsa_period_size; + err = snd_pcm_hw_params_get_period_size(hw_params, &alsa_period_size, + nullptr); + if (err < 0) + throw FormatRuntimeError("snd_pcm_hw_params_get_period_size() failed: %s", + snd_strerror(-err)); + + FormatDebug(alsa_input_domain, "buffer_size=%u period_size=%u", + (unsigned)alsa_buffer_size, (unsigned)alsa_period_size); + snd_pcm_sw_params_t *sw_params; snd_pcm_sw_params_malloc(&sw_params); |