3 ** Copyright 2007, The Android Open Source Project
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
9 ** http://www.apache.org/licenses/LICENSE-2.0
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.
18 #ifndef ANDROID_AUDIO_HARDWARE_GENERIC_H
19 #define ANDROID_AUDIO_HARDWARE_GENERIC_H
22 #include <sys/types.h>
24 #include <utils/threads.h>
26 #include <hardware_legacy/AudioSystemLegacy.h>
27 #include <hardware_legacy/AudioHardwareBase.h>
29 namespace android_audio_legacy {
31 using android::AutoMutex;
33 // ----------------------------------------------------------------------------
35 class AudioHardwareGeneric;
37 class AudioStreamOutGeneric : public AudioStreamOut {
39 AudioStreamOutGeneric() : mAudioHardware(0), mFd(-1) {}
40 virtual ~AudioStreamOutGeneric();
43 AudioHardwareGeneric *hw,
50 virtual uint32_t sampleRate() const { return 44100; }
51 virtual size_t bufferSize() const { return 4096; }
52 virtual uint32_t channels() const { return AudioSystem::CHANNEL_OUT_STEREO; }
53 virtual int format() const { return AudioSystem::PCM_16_BIT; }
54 virtual uint32_t latency() const { return 20; }
55 virtual status_t setVolume(float left, float right) { return INVALID_OPERATION; }
56 virtual ssize_t write(const void* buffer, size_t bytes);
57 virtual status_t standby();
58 virtual status_t dump(int fd, const Vector<String16>& args);
59 virtual status_t setParameters(const String8& keyValuePairs);
60 virtual String8 getParameters(const String8& keys);
61 virtual status_t getRenderPosition(uint32_t *dspFrames);
64 AudioHardwareGeneric *mAudioHardware;
70 class AudioStreamInGeneric : public AudioStreamIn {
72 AudioStreamInGeneric() : mAudioHardware(0), mFd(-1) {}
73 virtual ~AudioStreamInGeneric();
76 AudioHardwareGeneric *hw,
82 AudioSystem::audio_in_acoustics acoustics);
84 virtual uint32_t sampleRate() const { return 8000; }
85 virtual size_t bufferSize() const { return 320; }
86 virtual uint32_t channels() const { return AudioSystem::CHANNEL_IN_MONO; }
87 virtual int format() const { return AudioSystem::PCM_16_BIT; }
88 virtual status_t setGain(float gain) { return INVALID_OPERATION; }
89 virtual ssize_t read(void* buffer, ssize_t bytes);
90 virtual status_t dump(int fd, const Vector<String16>& args);
91 virtual status_t standby() { return NO_ERROR; }
92 virtual status_t setParameters(const String8& keyValuePairs);
93 virtual String8 getParameters(const String8& keys);
94 virtual unsigned int getInputFramesLost() const { return 0; }
95 virtual status_t addAudioEffect(effect_handle_t effect) { return NO_ERROR; }
96 virtual status_t removeAudioEffect(effect_handle_t effect) { return NO_ERROR; }
99 AudioHardwareGeneric *mAudioHardware;
106 class AudioHardwareGeneric : public AudioHardwareBase
109 AudioHardwareGeneric();
110 virtual ~AudioHardwareGeneric();
111 virtual status_t initCheck();
112 virtual status_t setVoiceVolume(float volume);
113 virtual status_t setMasterVolume(float volume);
116 virtual status_t setMicMute(bool state);
117 virtual status_t getMicMute(bool* state);
119 // create I/O streams
120 virtual AudioStreamOut* openOutputStream(
123 uint32_t *channels=0,
124 uint32_t *sampleRate=0,
126 virtual void closeOutputStream(AudioStreamOut* out);
128 virtual AudioStreamIn* openInputStream(
132 uint32_t *sampleRate,
134 AudioSystem::audio_in_acoustics acoustics);
135 virtual void closeInputStream(AudioStreamIn* in);
137 void closeOutputStream(AudioStreamOutGeneric* out);
138 void closeInputStream(AudioStreamInGeneric* in);
140 virtual status_t dump(int fd, const Vector<String16>& args);
143 status_t dumpInternals(int fd, const Vector<String16>& args);
146 AudioStreamOutGeneric *mOutput;
147 AudioStreamInGeneric *mInput;
152 // ----------------------------------------------------------------------------
154 }; // namespace android
156 #endif // ANDROID_AUDIO_HARDWARE_GENERIC_H