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Better PCM mmap API. Fixed pcm_multi

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This commit is contained in:
Abramo Bagnara 2001-04-13 15:40:53 +00:00
parent c4f95f48c3
commit 6a3b962d06
16 changed files with 279 additions and 279 deletions
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30
src/pcm/pcm_local.h
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@ -114,7 +114,7 @@ typedef struct {
snd_pcm_sframes_t (*readi)(snd_pcm_t *pcm, void *buffer, snd_pcm_uframes_t size);
snd_pcm_sframes_t (*readn)(snd_pcm_t *pcm, void **bufs, snd_pcm_uframes_t size);
snd_pcm_sframes_t (*avail_update)(snd_pcm_t *pcm);
snd_pcm_sframes_t (*mmap_forward)(snd_pcm_t *pcm, snd_pcm_uframes_t size);
snd_pcm_sframes_t (*mmap_commit)(snd_pcm_t *pcm, snd_pcm_uframes_t offset, snd_pcm_uframes_t size);
} snd_pcm_fast_ops_t;
struct _snd_pcm {
@ -209,9 +209,11 @@ void snd_pcm_mmap_appl_backward(snd_pcm_t *pcm, snd_pcm_uframes_t frames);
void snd_pcm_mmap_appl_forward(snd_pcm_t *pcm, snd_pcm_uframes_t frames);
void snd_pcm_mmap_hw_backward(snd_pcm_t *pcm, snd_pcm_uframes_t frames);
void snd_pcm_mmap_hw_forward(snd_pcm_t *pcm, snd_pcm_uframes_t frames);
snd_pcm_uframes_t snd_pcm_mmap_hw_offset(snd_pcm_t *pcm);
snd_pcm_uframes_t snd_pcm_mmap_playback_xfer(snd_pcm_t *pcm, snd_pcm_uframes_t frames);
snd_pcm_uframes_t snd_pcm_mmap_capture_xfer(snd_pcm_t *pcm, snd_pcm_uframes_t frames);
snd_pcm_sframes_t snd_pcm_mmap_writei(snd_pcm_t *pcm, const void *buffer, snd_pcm_uframes_t size);
snd_pcm_sframes_t snd_pcm_mmap_readi(snd_pcm_t *pcm, void *buffer, snd_pcm_uframes_t size);
snd_pcm_sframes_t snd_pcm_mmap_writen(snd_pcm_t *pcm, void **bufs, snd_pcm_uframes_t size);
snd_pcm_sframes_t snd_pcm_mmap_readn(snd_pcm_t *pcm, void **bufs, snd_pcm_uframes_t size);
typedef snd_pcm_uframes_t (*snd_pcm_xfer_areas_func_t)(snd_pcm_t *pcm,
const snd_pcm_channel_area_t *areas,
@ -279,6 +281,26 @@ static inline snd_pcm_sframes_t snd_pcm_mmap_hw_avail(snd_pcm_t *pcm)
return pcm->buffer_size - avail;
}
static inline const snd_pcm_channel_area_t *snd_pcm_mmap_areas(snd_pcm_t *pcm)
{
if (pcm->stopped_areas &&
snd_pcm_state(pcm) != SND_PCM_STATE_RUNNING)
return pcm->stopped_areas;
return pcm->running_areas;
}
static inline snd_pcm_uframes_t snd_pcm_mmap_offset(snd_pcm_t *pcm)
{
assert(pcm);
return *pcm->appl_ptr % pcm->buffer_size;
}
static inline snd_pcm_uframes_t snd_pcm_mmap_hw_offset(snd_pcm_t *pcm)
{
assert(pcm);
return *pcm->hw_ptr % pcm->buffer_size;
}
#define snd_pcm_mmap_playback_delay snd_pcm_mmap_playback_hw_avail
#define snd_pcm_mmap_capture_delay snd_pcm_mmap_capture_avail