1 /* 2 ** 3 ** Copyright 2007, The Android Open Source Project 4 ** 5 ** Licensed under the Apache License, Version 2.0 (the "License"); 6 ** you may not use this file except in compliance with the License. 7 ** You may obtain a copy of the License at 8 ** 9 ** http://www.apache.org/licenses/LICENSE-2.0 10 ** 11 ** Unless required by applicable law or agreed to in writing, software 12 ** distributed under the License is distributed on an "AS IS" BASIS, 13 ** WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 14 ** See the License for the specific language governing permissions and 15 ** limitations under the License. 16 */ 17 18 #ifndef ANDROID_AUDIO_HARDWARE_GENERIC_H 19 #define ANDROID_AUDIO_HARDWARE_GENERIC_H 20 21 #include <stdint.h> 22 #include <sys/types.h> 23 24 #include <utils/threads.h> 25 26 #include <hardware_legacy/AudioHardwareBase.h> 27 28 namespace android_audio_legacy { 29 using android::Mutex; 30 using android::AutoMutex; 31 32 // ---------------------------------------------------------------------------- 33 34 class AudioHardwareGeneric; 35 36 class AudioStreamOutGeneric : public AudioStreamOut { 37 public: 38 AudioStreamOutGeneric() : mAudioHardware(0), mFd(-1) {} 39 virtual ~AudioStreamOutGeneric(); 40 41 virtual status_t set( 42 AudioHardwareGeneric *hw, 43 int mFd, 44 uint32_t devices, 45 int *pFormat, 46 uint32_t *pChannels, 47 uint32_t *pRate); 48 49 virtual uint32_t sampleRate() const { return 44100; } 50 virtual size_t bufferSize() const { return 4096; } 51 virtual uint32_t channels() const { return AudioSystem::CHANNEL_OUT_STEREO; } 52 virtual int format() const { return AudioSystem::PCM_16_BIT; } 53 virtual uint32_t latency() const { return 20; } 54 virtual status_t setVolume(float left, float right) { return INVALID_OPERATION; } 55 virtual ssize_t write(const void* buffer, size_t bytes); 56 virtual status_t standby(); 57 virtual status_t dump(int fd, const Vector<String16>& args); 58 virtual status_t setParameters(const String8& keyValuePairs); 59 virtual String8 getParameters(const String8& keys); 60 virtual status_t getRenderPosition(uint32_t *dspFrames); 61 62 private: 63 AudioHardwareGeneric *mAudioHardware; 64 Mutex mLock; 65 int mFd; 66 uint32_t mDevice; 67 }; 68 69 class AudioStreamInGeneric : public AudioStreamIn { 70 public: 71 AudioStreamInGeneric() : mAudioHardware(0), mFd(-1) {} 72 virtual ~AudioStreamInGeneric(); 73 74 virtual status_t set( 75 AudioHardwareGeneric *hw, 76 int mFd, 77 uint32_t devices, 78 int *pFormat, 79 uint32_t *pChannels, 80 uint32_t *pRate, 81 AudioSystem::audio_in_acoustics acoustics); 82 83 virtual uint32_t sampleRate() const { return 8000; } 84 virtual size_t bufferSize() const { return 320; } 85 virtual uint32_t channels() const { return AudioSystem::CHANNEL_IN_MONO; } 86 virtual int format() const { return AudioSystem::PCM_16_BIT; } 87 virtual status_t setGain(float gain) { return INVALID_OPERATION; } 88 virtual ssize_t read(void* buffer, ssize_t bytes); 89 virtual status_t dump(int fd, const Vector<String16>& args); 90 virtual status_t standby() { return NO_ERROR; } 91 virtual status_t setParameters(const String8& keyValuePairs); 92 virtual String8 getParameters(const String8& keys); 93 virtual unsigned int getInputFramesLost() const { return 0; } 94 virtual status_t addAudioEffect(effect_handle_t effect) { return NO_ERROR; } 95 virtual status_t removeAudioEffect(effect_handle_t effect) { return NO_ERROR; } 96 97 private: 98 AudioHardwareGeneric *mAudioHardware; 99 Mutex mLock; 100 int mFd; 101 uint32_t mDevice; 102 }; 103 104 105 class AudioHardwareGeneric : public AudioHardwareBase 106 { 107 public: 108 AudioHardwareGeneric(); 109 virtual ~AudioHardwareGeneric(); 110 virtual status_t initCheck(); 111 virtual status_t setVoiceVolume(float volume); 112 virtual status_t setMasterVolume(float volume); 113 114 // mic mute 115 virtual status_t setMicMute(bool state); 116 virtual status_t getMicMute(bool* state); 117 118 // create I/O streams 119 virtual AudioStreamOut* openOutputStream( 120 uint32_t devices, 121 int *format=0, 122 uint32_t *channels=0, 123 uint32_t *sampleRate=0, 124 status_t *status=0); 125 virtual void closeOutputStream(AudioStreamOut* out); 126 127 virtual AudioStreamIn* openInputStream( 128 uint32_t devices, 129 int *format, 130 uint32_t *channels, 131 uint32_t *sampleRate, 132 status_t *status, 133 AudioSystem::audio_in_acoustics acoustics); 134 virtual void closeInputStream(AudioStreamIn* in); 135 136 void closeOutputStream(AudioStreamOutGeneric* out); 137 void closeInputStream(AudioStreamInGeneric* in); 138 protected: 139 virtual status_t dump(int fd, const Vector<String16>& args); 140 141 private: 142 status_t dumpInternals(int fd, const Vector<String16>& args); 143 144 Mutex mLock; 145 AudioStreamOutGeneric *mOutput; 146 AudioStreamInGeneric *mInput; 147 int mFd; 148 bool mMicMute; 149 }; 150 151 // ---------------------------------------------------------------------------- 152 153 }; // namespace android 154 155 #endif // ANDROID_AUDIO_HARDWARE_GENERIC_H 156
