* Copyright 2007 Haiku Inc. All rights reserved.
* Distributed under the terms of the MIT License.
*/
#ifndef NULL_AUDIO_DRIVER_H
#define NULL_AUDIO_DRIVER_H
#include <drivers/driver_settings.h>
#include <drivers/Drivers.h>
#include <drivers/KernelExport.h>
#include <hmulti_audio.h>
#include <string.h>
#include <stdlib.h>
#define FRAMES_PER_BUFFER 1024
#define MULTI_AUDIO_BASE_ID 1024
#define MULTI_AUDIO_DEV_PATH "audio/hmulti"
#define MULTI_AUDIO_MASTER_ID 0
#define STRMINBUF 2
#define STRMAXBUF 2
typedef struct {
spinlock lock;
int bits;
void* buffers[STRMAXBUF];
uint32 num_buffers;
uint32 num_channels;
uint32 format;
uint32 rate;
uint32 buffer_length;
sem_id buffer_ready_sem;
uint32 frames_count;
uint32 buffer_cycle;
bigtime_t real_time;
area_id buffer_area;
} device_stream_t;
typedef struct {
device_stream_t playback_stream;
device_stream_t record_stream;
thread_id interrupt_thread;
bool running;
} device_t;
extern device_hooks driver_hooks;
int32 format_to_sample_size(uint32 format);
status_t multi_audio_control(void* cookie, uint32 op, void* arg, size_t len);
status_t null_hw_create_virtual_buffers(device_stream_t* stream, const char* name);
status_t null_start_hardware(device_t* device);
void null_stop_hardware(device_t* device);
#endif
