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Add snd_pcm_hw_params_get/set_export_buffer()

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Add snd_pcm_hw_params_get/set_export_buffer() API functions.
They control to ensure the buffer export to other processes.
If this flag is set, the local buffer of a plugin is exported over IPC shm.
Otherwise the buffer can be handled only locally (no shm).

Also fixed Version file for 1.0.9.
This commit is contained in:
Takashi Iwai 2005-05-19 16:59:04 +00:00
parent 18053076e2
commit 4d7c53d280
7 changed files with 65 additions and 12 deletions
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13
src/pcm/pcm_local.h
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@ -92,11 +92,8 @@ typedef enum sndrv_pcm_hw_param snd_pcm_hw_param_t;
/** device can do a kind of synchronized start */
#define SND_PCM_INFO_SYNC_START SNDRV_PCM_INFO_SYNC_START
#ifndef SNDRV_PCM_HW_PARAMS_NORESAMPLE
#define SND_PCM_HW_PARAMS_NORESAMPLE (1<<0)
#else
#define SND_PCM_HW_PARAMS_NORESAMPLE SNDRV_PCM_HW_PARAMS_NORESAMPLE
#endif
#define SND_PCM_HW_PARAMS_EXPORT_BUFFER SNDRV_PCM_HW_PARAMS_EXPORT_BUFFER
typedef struct _snd_pcm_rbptr {
snd_pcm_t *master;
@ -114,7 +111,7 @@ typedef struct _snd_pcm_channel_info {
void *addr; /* base address of channel samples */
unsigned int first; /* offset to first sample in bits */
unsigned int step; /* samples distance in bits */
enum { SND_PCM_AREA_SHM, SND_PCM_AREA_MMAP } type;
enum { SND_PCM_AREA_SHM, SND_PCM_AREA_MMAP, SND_PCM_AREA_LOCAL } type;
union {
struct {
struct snd_shm_area *area;
@ -214,9 +211,9 @@ struct _snd_pcm {
snd_pcm_rbptr_t appl;
snd_pcm_rbptr_t hw;
snd_pcm_uframes_t min_align;
int mmap_rw: 1,
mmap_shadow: 1,
donot_close: 1;
unsigned int mmap_rw: 1;
unsigned int mmap_shadow: 1;
unsigned int donot_close: 1;
snd_pcm_channel_info_t *mmap_channels;
snd_pcm_channel_area_t *running_areas;
snd_pcm_channel_area_t *stopped_areas;