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-/*
- * PortAudio Portable Real-Time Audio Library
- * Latest Version at: http://www.portaudio.com
- * Linux OSS Implementation by douglas repetto and Phil Burk
- *
- * Copyright (c) 1999-2000 Phil Burk
- *
- * Permission is hereby granted, free of charge, to any person obtaining
- * a copy of this software and associated documentation files
- * (the "Software"), to deal in the Software without restriction,
- * including without limitation the rights to use, copy, modify, merge,
- * publish, distribute, sublicense, and/or sell copies of the Software,
- * and to permit persons to whom the Software is furnished to do so,
- * subject to the following conditions:
- *
- * The above copyright notice and this permission notice shall be
- * included in all copies or substantial portions of the Software.
- *
- * Any person wishing to distribute modifications to the Software is
- * requested to send the modifications to the original developer so that
- * they can be incorporated into the canonical version.
- *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
- * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
- * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
- * IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR
- * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF
- * CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
- * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
- *
- */
-
-/* Modification history:
- 20020621: pa_unix_oss.c split into pa_unix.c, pa_unix.h, pa_unix_oss.c by
- Augustus Saunders. See pa_unix.c for previous history. */
-
-/*
- PROPOSED - should we add this to "portaudio.h". Problem with
- Pa_QueryDevice() not having same driver name os Pa_OpenStream().
-
- A PaDriverInfo structure can be passed to the underlying device
- on the Pa_OpenStream() call. The contents and interpretation of
- the structure is determined by the PA implementation.
-*/
-typedef struct PaDriverInfo /* PROPOSED */
-{
- /* Size of structure. Allows driver to extend the structure without breaking existing applications. */
- int size;
- /* Can be used to request a specific device name. */
- const char *name;
- unsigned long data;
-}
-PaDriverInfo;
-
-#include <stdio.h>
-#include <stdlib.h>
-//#include <malloc.h>
-#include <memory.h>
-#include <math.h>
-#include <sys/ioctl.h>
-#include <sys/time.h>
-#include <fcntl.h>
-#include <unistd.h>
-#include <signal.h>
-#include <sched.h>
-#include <pthread.h>
-#include <errno.h>
-
-#include "portaudio.h"
-#include "pa_host.h"
-#include "pa_trace.h"
-
-#define PRINT(x) { printf x; fflush(stdout); }
-#define ERR_RPT(x) PRINT(x)
-#define DBUG(x) /* PRINT(x) */
-#define DBUGX(x) /* PRINT(x) */
-
-#define BAD_DEVICE_ID (-1)
-
-#define MIN_LATENCY_MSEC (100)
-#define MIN_TIMEOUT_MSEC (100)
-#define MAX_TIMEOUT_MSEC (1000)
-
-/************************************************* Definitions ********/
-#ifdef __linux__
- #define DEVICE_NAME_BASE "/dev/dsp"
-#else
- #define DEVICE_NAME_BASE "/dev/audio"
-#endif
-
-#define MAX_CHARS_DEVNAME (32)
-#define MAX_SAMPLE_RATES (10)
-typedef struct internalPortAudioDevice
-{
- struct internalPortAudioDevice *pad_Next; /* Singly linked list. */
- double pad_SampleRates[MAX_SAMPLE_RATES]; /* for pointing to from pad_Info */
- char pad_DeviceName[MAX_CHARS_DEVNAME];
- PaDeviceInfo pad_Info;
-}
-internalPortAudioDevice;
-
-/* Define structure to contain all OSS and Linux specific data. */
-typedef struct PaHostSoundControl
-{
- int pahsc_OutputHandle;
- int pahsc_InputHandle;
- int pahsc_AudioPriority; /* priority of background audio thread */
- pthread_t pahsc_AudioThread; /* background audio thread */
- int pahsc_IsAudioThreadValid; /* Is pahsc_AudioThread valid?*/ pid_t pahsc_AudioThreadPID; /* background audio thread */
- pthread_t pahsc_WatchDogThread; /* highest priority thread that protects system */
- int pahsc_IsWatchDogThreadValid; /* Is pahsc_WatchDogThread valid?*/
- int pahsc_WatchDogRun; /* Ask WatchDog to stop. */
- pthread_t pahsc_CanaryThread; /* low priority thread that detects abuse by audio */
- int pahsc_IsCanaryThreadValid; /* Is pahsc_CanaryThread valid?*/
- struct timeval pahsc_CanaryTime;
- int pahsc_CanaryRun; /* Ask Canary to stop. */
- short *pahsc_NativeInputBuffer;
- short *pahsc_NativeOutputBuffer;
- unsigned int pahsc_BytesPerInputBuffer; /* native buffer size in bytes */
- unsigned int pahsc_BytesPerOutputBuffer; /* native buffer size in bytes */
- /* For measuring CPU utilization. */
- struct timeval pahsc_EntryTime;
- double pahsc_InverseMicrosPerBuffer; /* 1/Microseconds of real-time audio per user buffer. */
-
- /* For calculating stream time */
- int pahsc_LastPosPtr;
- double pahsc_LastStreamBytes;
-}
-PaHostSoundControl;
-
-/************************************************* Prototypes **********/
-
-internalPortAudioDevice *Pa_GetInternalDevice( PaDeviceID id );
-PaError Pa_QueryDevices( void );
-PaError Pa_QueryDevice( const char *deviceName, internalPortAudioDevice *pad );
-PaError Pa_SetupDeviceFormat( int devHandle, int numChannels, int sampleRate );
-PaError Pa_SetupInputDeviceFormat( int devHandle, int numChannels, int sampleRate );
-PaError Pa_SetupOutputDeviceFormat( int devHandle, int numChannels, int sampleRate );
-void Pa_SetLatency( int devHandle, int numBuffers, int framesPerBuffer, int channelsPerFrame );
-void Pa_UpdateStreamTime(PaHostSoundControl *pahsc);
-int Pa_FlushStream(int devHandle);