src/add-ons/media/media-add-ons/opensound/OpenSoundDevice.h

   1 /*
   2  * Copyright (c) 2002-2007, Jerome Duval (jerome.duval@free.fr)
   3  * Distributed under the terms of the MIT License.
   4  */
   5
   6 #ifndef _OPENSOUNDDEVICE_H
   7 #define _OPENSOUNDDEVICE_H
   8
   9 #include <OS.h>
  10 #include <List.h>
  11 #include <MediaFormats.h>
  12 #include <Locker.h>
  13 #include "soundcard.h"
  14
  15 //
  16 //#define OSS_PREFIX "/dev/audio/oss/"
  17 #define OSS_PREFIX "/dev/oss/"
  18 // should be fixed later
  19 #define OSS_MIXER_DEV "/dev/mixer"
  20
  21 #define MAX_CONTROLS    128
  22 #define MAX_CHANNELS    32
  23 #define NB_BUFFERS              32
  24
  25 #define DEFAULT_BUFFER_SIZE 2048
  26
  27 /* define to support encoded audio (AC3, MPEG, ...) when the card supports it */
  28 //#define ENABLE_NON_RAW_SUPPORT 1
  29 //XXX: make it a BParameter ?
  30
  31 #define ENABLE_REC 1
  32
  33 // timeout in OpenSoundNode::RunThread()
  34 #define MIN_SNOOZING 2000
  35
  36 // pretend we don't drift
  37 #define DISABLE_DRIFT 1
  38
  39
  40 /* bit mask of supported formats for raw_audio */
  41 /* also used to mark the raw_audio node input&outputs */
  42 //XXX: _OE ?
  43 #define AFMT_SUPPORTED_PCM (AFMT_U8|AFMT_S8|\
  44                                                         AFMT_S16_NE|\
  45                                                         AFMT_S24_NE|AFMT_S32_NE|\
  46                                                         AFMT_S16_OE|\
  47                                                         AFMT_S24_OE|AFMT_S32_OE|\
  48                                                         AFMT_FLOAT)
  49
  50
  51 extern const int gSupportedFormats[];
  52 extern const char *gSupportedFormatsNames[];
  53
  54 class OpenSoundDeviceEngine;
  55 class OpenSoundDeviceMixer;
  56
  57
  58 class OpenSoundDevice
  59 {
  60         public:
  61                 explicit OpenSoundDevice(oss_card_info *cardinfo);
  62                 virtual ~OpenSoundDevice(void);
  63
  64                 status_t                        InitDriver();
  65                 virtual status_t InitCheck(void) const;
  66
  67                 status_t                        AddEngine(oss_audioinfo *info);
  68                 status_t                        AddMixer(oss_mixerinfo *info);
  69 //              status_t                        AddMidi();
  70
  71                 int32                                   CountEngines();
  72                 int32                                   CountMixers();
  73                 OpenSoundDeviceEngine   *EngineAt(int32 i);
  74                 OpenSoundDeviceMixer    *MixerAt(int32 i);
  75
  76                 OpenSoundDeviceEngine   *NextFreeEngineAt(int32 i, bool rec=false);
  77
  78                 BLocker                                 *Locker() { return &fLocker; };
  79
  80                 static float convert_oss_rate_to_media_rate(int rate);
  81                 static int convert_media_rate_to_oss_rate(float rate);
  82                 static uint32 convert_oss_format_to_media_format(int fmt);
  83                 static int convert_oss_format_to_endian(int fmt);
  84                 static int16 convert_oss_format_to_valid_bits(int fmt);
  85                 static int convert_media_format_to_oss_format(uint32 fmt);
  86                 static int select_oss_rate(const oss_audioinfo *info, int rate);
  87                 static int select_oss_format(int fmt);
  88
  89                 static status_t get_media_format_description_for(int fmt, media_format_description *desc, int count=1);
  90                 static status_t register_media_formats();
  91                 static status_t get_media_format_for(int fmt, media_format &format);
  92
  93         public:
  94                 oss_card_info                   fCardInfo;
  95
  96         private:
  97                 status_t                                fInitCheckStatus;
  98                 BList                                   fEngines;
  99                 BList                                   fMixers;
 100 friend class OpenSoundNode; // ugly
 101 friend class OpenSoundDeviceEngine; // ugly
 102                 audio_buf_info                  fFragments;
 103                 BLocker                                 fLocker;
 104 };
 105
 106 #endif