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PCM loopback API improved and added back the functionality.

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Some mmap() changes for the OSS emulation.
This commit is contained in:
Jaroslav Kysela 1999-11-30 09:25:59 +00:00
parent 3239ca9940
commit f5e461caa3
4 changed files with 182 additions and 34 deletions
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14
include/pcm.h
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@ -144,13 +144,23 @@ int snd_pcm_plugin_build_voices(int src_format, int src_voices,
extern "C" {
#endif
int snd_pcm_loopback_open(snd_pcm_loopback_t **handle, int card, int device, int subchn, int mode);
typedef struct snd_pcm_loopback_callbacks {
void *private_data; /* should be used with an application */
size_t max_buffer_size; /* zero = default (64kB) */
void (*data) (void *private_data, char *buffer, size_t count);
void (*position_change) (void *private_data, unsigned int pos);
void (*format_change) (void *private_data, snd_pcm_format_t *format);
char *reserved[32]; /* reserved for the future use - must be NULL!!! */
} snd_pcm_loopback_callbacks_t;
int snd_pcm_loopback_open(snd_pcm_loopback_t **handle, int card, int device, int subdev, int mode);
int snd_pcm_loopback_close(snd_pcm_loopback_t *handle);
int snd_pcm_loopback_file_descriptor(snd_pcm_loopback_t *handle);
int snd_pcm_loopback_block_mode(snd_pcm_loopback_t *handle, int enable);
int snd_pcm_loopback_stream_mode(snd_pcm_loopback_t *handle, int mode);
int snd_pcm_loopback_format(snd_pcm_loopback_t *handle, snd_pcm_format_t * format);
ssize_t snd_pcm_loopback_read(snd_pcm_loopback_t *handle, void *buffer, size_t size);
int snd_pcm_loopback_status(snd_pcm_loopback_t *handle, snd_pcm_loopback_status_t * status);
ssize_t snd_pcm_loopback_read(snd_pcm_loopback_t *handle, snd_pcm_loopback_callbacks_t * callbacks);
#ifdef __cplusplus
}