/usr/include/bse/bsepcmdevice.hh is in libbse-dev 0.7.8-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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#ifndef __BSE_PCM_DEVICE_H__
#define __BSE_PCM_DEVICE_H__
#include <bse/bsedevice.hh>
G_BEGIN_DECLS
/* --- object type macros --- */
#define BSE_TYPE_PCM_DEVICE (BSE_TYPE_ID (BsePcmDevice))
#define BSE_PCM_DEVICE(object) (G_TYPE_CHECK_INSTANCE_CAST ((object), BSE_TYPE_PCM_DEVICE, BsePcmDevice))
#define BSE_PCM_DEVICE_CLASS(class) (G_TYPE_CHECK_CLASS_CAST ((class), BSE_TYPE_PCM_DEVICE, BsePcmDeviceClass))
#define BSE_IS_PCM_DEVICE(object) (G_TYPE_CHECK_INSTANCE_TYPE ((object), BSE_TYPE_PCM_DEVICE))
#define BSE_IS_PCM_DEVICE_CLASS(class) (G_TYPE_CHECK_CLASS_TYPE ((class), BSE_TYPE_PCM_DEVICE))
#define BSE_PCM_DEVICE_GET_CLASS(object) (G_TYPE_INSTANCE_GET_CLASS ((object), BSE_TYPE_PCM_DEVICE, BsePcmDeviceClass))
/* --- capabilities --- */
#define BSE_PCM_FREQ_MIN BSE_PCM_FREQ_8000
#define BSE_PCM_FREQ_MAX BSE_PCM_FREQ_192000
typedef enum /*< skip >*/
{
BSE_PCM_CMODE_MONO = 1,
BSE_PCM_CMODE_STEREO
} BsePcmChannelMode;
/* --- BsePcmDevice structs --- */
typedef struct _BsePcmStatus BsePcmStatus;
typedef struct _BsePcmHandle BsePcmHandle;
typedef struct _BsePcmDevice BsePcmDevice;
typedef struct _BsePcmDeviceClass BsePcmDeviceClass;
struct _BsePcmHandle
{
guint readable : 1;
guint writable : 1;
guint n_channels; /* should be req_n_channels */
guint mix_freq; /* should be req_mix_freq within 1% tolerance */
guint block_length; /* in frames, filled in after open() before i/o */
BirnetMutex mutex;
gsize (*read) (BsePcmHandle *handle,
gfloat *values); /* n_channels * block_length values */
void (*write) (BsePcmHandle *handle,
const gfloat *values); /* n_channels * block_length values */
gboolean (*check_io) (BsePcmHandle *handle,
glong *timeoutp);
guint (*latency) (BsePcmHandle *handle);
};
struct _BsePcmDevice
{
BseDevice parent_instance;
/* requested caps */
guint req_n_channels;
guint req_mix_freq;
guint req_latency_ms; /* latency in milliseconds */
guint req_block_length; /* in frames, a guess at block_length after open() */
/* operational handle */
BsePcmHandle *handle;
};
struct _BsePcmDeviceClass
{
BseDeviceClass parent_class;
};
/* --- prototypes --- */
void bse_pcm_device_request (BsePcmDevice *pdev,
guint n_channels,
guint mix_freq,
guint latency_ms,
guint block_length); /* in frames */
guint bse_pcm_device_get_mix_freq (BsePcmDevice *pdev);
BsePcmHandle* bse_pcm_device_get_handle (BsePcmDevice *pdev,
guint block_length);
gsize bse_pcm_handle_read (BsePcmHandle *handle,
gsize n_values,
gfloat *values);
void bse_pcm_handle_write (BsePcmHandle *handle,
gsize n_values,
const gfloat *values);
gboolean bse_pcm_handle_check_io (BsePcmHandle *handle,
glong *timeoutp);
guint bse_pcm_handle_latency (BsePcmHandle *handle);
/* --- misc utils --- */
guint bse_pcm_device_frequency_align (gint mix_freq);
G_END_DECLS
#endif /* __BSE_PCM_DEVICE_H__ */
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