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update ALSA backend: separate playback/capture periods

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fixed: 2 for capture,  configurable 2,3 for playback.
This commit is contained in:
Robin Gareus 2015-12-05 00:46:36 +01:00
parent b5c5b7e493
commit a6f27f09a7
3 changed files with 28 additions and 20 deletions
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11
libs/backends/alsa/zita-alsa-pcmi.h
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@ -46,7 +46,8 @@ public:
const char *ctrl_name,
unsigned int rate,
unsigned int frsize,
unsigned int nfrags,
unsigned int play_nfrags,
unsigned int capt_nfrags,
unsigned int debug = 0);
~Alsa_pcmi (void);
@ -108,7 +109,8 @@ public:
int state (void) const { return _state; }
size_t fsize (void) const { return _fsize; }
uint32_t fsamp (void) const { return _fsamp; }
uint32_t nfrag (void) const { return _nfrag; }
uint32_t play_nfrag (void) const { return _play_nfrag; }
uint32_t capt_nfrag (void) const { return _capt_nfrag; }
uint32_t nplay (void) const { return _play_nchan; }
uint32_t ncapt (void) const { return _capt_nchan; }
snd_pcm_t *play_handle (void) const { return _play_handle; }
@ -124,7 +126,7 @@ private:
enum { MAXPFD = 16, MAXCHAN = 64 };
void initialise (const char *play_name, const char *capt_name, const char *ctrl_name);
int set_hwpar (snd_pcm_t *handle, snd_pcm_hw_params_t *hwpar, const char *sname, unsigned int *nchan);
int set_hwpar (snd_pcm_t *handle, snd_pcm_hw_params_t *hwpar, const char *sname, unsigned int nfrag, unsigned int *nchan);
int set_swpar (snd_pcm_t *handle, snd_pcm_sw_params_t *swpar, const char *sname);
int recover (void);
float xruncheck (snd_pcm_status_t *stat);
@ -151,7 +153,8 @@ private:
unsigned int _fsamp;
snd_pcm_uframes_t _fsize;
unsigned int _nfrag;
unsigned int _play_nfrag;
unsigned int _capt_nfrag;
unsigned int _debug;
int _state;
snd_pcm_t *_play_handle;