pa_linux_alsa.c File Reference

#include <alsa/asoundlib.h>
#include <sys/poll.h>
#include <string.h>
#include <limits.h>
#include <math.h>
#include <pthread.h>
#include <signal.h>
#include <time.h>
#include <sys/mman.h>
#include "portaudio.h"
#include "pa_util.h"
#include "pa_unix_util.h"
#include "pa_allocation.h"
#include "pa_hostapi.h"
#include "pa_stream.h"
#include "pa_cpuload.h"
#include "pa_process.h"
#include "pa_linux_alsa.h"

Data Structures
struct	PaAlsaStreamComponent
struct	PaAlsaStream
struct	PaAlsaHostApiRepresentation
struct	PaAlsaDeviceInfo
struct	DeviceNames
Defines
#define	ALSA_PCM_NEW_HW_PARAMS_API
#define	ALSA_PCM_NEW_SW_PARAMS_API
#define	ENSURE_(expr, code)
#define	ASSERT_CALL_(expr, success)
Enumerations
enum	StreamDirection { StreamDirection_In, StreamDirection_Out }
Functions
PaError	PaAlsa_Initialize (PaUtilHostApiRepresentation **hostApi, PaHostApiIndex hostApiIndex)
int	nearbyint_ (float value)
void	PaAlsa_InitializeStreamInfo (PaAlsaStreamInfo *info)
void	PaAlsa_EnableRealtimeScheduling (PaStream *s, int enable)
void	PaAlsa_EnableWatchdog (PaStream *s, int enable)

---

Define Documentation

#define ALSA_PCM_NEW_HW_PARAMS_API

#define ALSA_PCM_NEW_SW_PARAMS_API

#define ASSERT_CALL_	(	expr,
		success		)

Value:

aErr_ = (expr); \
    assert( success == aErr_ );

#define ENSURE_	(	expr,
		code		)

Value:

do { \
        if( UNLIKELY( (aErr_ = (expr)) < 0 ) ) \
        { \
            /* PaUtil_SetLastHostErrorInfo should only be used in the main thread */ \
            if( (code) == paUnanticipatedHostError && pthread_equal( pthread_self(), paUnixMainThread) ) \
            { \
                PaUtil_SetLastHostErrorInfo( paALSA, aErr_, snd_strerror( aErr_ ) ); \
            } \
            PaUtil_DebugPrint( "Expression '" #expr "' failed in '" __FILE__ "', line: " STRINGIZE( __LINE__ ) "\n" ); \
            if( (code) == paUnanticipatedHostError ) \
                PA_DEBUG(( "Host error description: %s\n", snd_strerror( aErr_ ) )); \
            result = (code); \
            goto error; \
        } \
    } while( 0 );

---

Enumeration Type Documentation

enum StreamDirection

Enumerator:

StreamDirection_In
StreamDirection_Out

---

Function Documentation

int nearbyint_

(

float

value

)

void PaAlsa_EnableRealtimeScheduling	(	PaStream *	s,
		int	enable
	)

void PaAlsa_EnableWatchdog	(	PaStream *	s,
		int	enable
	)

PaError PaAlsa_Initialize	(	PaUtilHostApiRepresentation **	hostApi,
		PaHostApiIndex	hostApiIndex
	)

void PaAlsa_InitializeStreamInfo

(

PaAlsaStreamInfo *

info

)

---