src/add-ons/kernel/drivers/audio/null/driver.h

   1 /*
   2  * Copyright 2007 Haiku Inc. All rights reserved.
   3  * Distributed under the terms of the MIT License.
   4  */
   5 #ifndef NULL_AUDIO_DRIVER_H
   6 #define NULL_AUDIO_DRIVER_H
   7
   8 #include <drivers/driver_settings.h>
   9 #include <drivers/Drivers.h>
  10 #include <drivers/KernelExport.h>
  11
  12 #include <hmulti_audio.h>
  13 #include <string.h>
  14 #include <stdlib.h>
  15
  16 #define FRAMES_PER_BUFFER 1024
  17 #define MULTI_AUDIO_BASE_ID 1024
  18 #define MULTI_AUDIO_DEV_PATH "audio/hmulti"
  19 #define MULTI_AUDIO_MASTER_ID 0
  20 #define STRMINBUF 2
  21 #define STRMAXBUF 2
  22
  23 typedef struct {
  24         spinlock        lock;
  25         int bits;
  26
  27         void*           buffers[STRMAXBUF];
  28         uint32          num_buffers;
  29         uint32          num_channels;
  30         uint32          format;
  31         uint32          rate;
  32
  33         uint32          buffer_length;
  34         sem_id          buffer_ready_sem;
  35         uint32          frames_count;
  36         uint32          buffer_cycle;
  37         bigtime_t       real_time;
  38
  39         area_id         buffer_area;
  40 } device_stream_t;
  41
  42 typedef struct {
  43         device_stream_t playback_stream;
  44         device_stream_t record_stream;
  45
  46         thread_id interrupt_thread;
  47         bool running;
  48 } device_t;
  49
  50 extern device_hooks driver_hooks;
  51 int32 format_to_sample_size(uint32 format);
  52
  53 status_t multi_audio_control(void* cookie, uint32 op, void* arg, size_t len);
  54
  55 status_t null_hw_create_virtual_buffers(device_stream_t* stream, const char* name);
  56 status_t null_start_hardware(device_t* device);
  57 void null_stop_hardware(device_t* device);
  58
  59 #endif /* NULL_AUDIO_DRIVER_H */
  60