diff options
Diffstat (limited to 'libs/backends/alsa/zita-alsa-pcmi.cc')
| -rw-r--r-- | libs/backends/alsa/zita-alsa-pcmi.cc | 11 |
1 files changed, 10 insertions, 1 deletions
diff --git a/libs/backends/alsa/zita-alsa-pcmi.cc b/libs/backends/alsa/zita-alsa-pcmi.cc index 6eead7e28b..3c271b6907 100644 --- a/libs/backends/alsa/zita-alsa-pcmi.cc +++ b/libs/backends/alsa/zita-alsa-pcmi.cc @@ -270,6 +270,9 @@ int Alsa_pcmi::play_init (snd_pcm_uframes_t len) const snd_pcm_channel_area_t *a; int err; + if (!_play_handle) { + return 0; + } if ((err = snd_pcm_mmap_begin (_play_handle, &a, &_play_offs, &len)) < 0) { if (_debug & DEBUG_DATA) fprintf (stderr, "Alsa_pcmi: snd_pcm_mmap_begin(play): %s.\n", snd_strerror (err)); @@ -291,6 +294,10 @@ int Alsa_pcmi::capt_init (snd_pcm_uframes_t len) const snd_pcm_channel_area_t *a; int err; + if (!_capt_handle) { + return 0; + } + if ((err = snd_pcm_mmap_begin (_capt_handle, &a, &_capt_offs, &len)) < 0) { if (_debug & DEBUG_DATA) fprintf (stderr, "Alsa_pcmi: snd_pcm_mmap_begin(capt): %s.\n", snd_strerror (err)); @@ -326,12 +333,14 @@ void Alsa_pcmi::capt_chan (int chan, float *dst, int len, int step) int Alsa_pcmi::play_done (int len) { + if (!_play_handle) return 0; return snd_pcm_mmap_commit (_play_handle, _play_offs, len); } int Alsa_pcmi::capt_done (int len) { + if (!_capt_handle) return 0; return snd_pcm_mmap_commit (_capt_handle, _capt_offs, len); } @@ -394,7 +403,7 @@ void Alsa_pcmi::initialise (const char *play_name, const char *capt_name, const } } - if (! _play_handle || ! _capt_handle) return; + if (! _play_handle && ! _capt_handle) return; if (ctrl_name) { |