diff options
Diffstat (limited to 'gr-audio-alsa/src')
| -rw-r--r-- | gr-audio-alsa/src/audio_alsa_sink.cc | 10 |
1 files changed, 8 insertions, 2 deletions
diff --git a/gr-audio-alsa/src/audio_alsa_sink.cc b/gr-audio-alsa/src/audio_alsa_sink.cc index c28e23fea6..d44a93b3f3 100644 --- a/gr-audio-alsa/src/audio_alsa_sink.cc +++ b/gr-audio-alsa/src/audio_alsa_sink.cc @@ -221,9 +221,15 @@ audio_alsa_sink::check_topology (int ninputs, int noutputs) int nchan = ninputs; int err; - // FIXME check_topology may be called more than once. + // Check the state of the stream // Ensure that the pcm is in a state where we can still mess with the hw_params - + snd_pcm_state_t state; + state=snd_pcm_state(d_pcm_handle); + if ( state== SND_PCM_STATE_RUNNING) + return true; // If stream is running, don't change any parameters + else if(state == SND_PCM_STATE_XRUN ) + snd_pcm_prepare ( d_pcm_handle ); // Prepare stream on underrun, and we can set parameters; + bool special_case = nchan == 1 && d_special_case_mono_to_stereo; if (special_case) nchan = 2; |