libaudio-qdsp5v2/AudioHardware.h

/*
** Copyright 2008, The Android Open-Source Project
**
** Licensed under the Apache License, Version 2.0 (the "License");
** you may not use this file except in compliance with the License.
** You may obtain a copy of the License at
**
**     http://www.apache.org/licenses/LICENSE-2.0
**
** Unless required by applicable law or agreed to in writing, software
** distributed under the License is distributed on an "AS IS" BASIS,
** WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
** See the License for the specific language governing permissions and
** limitations under the License.
*/

#ifndef ANDROID_AUDIO_HARDWARE_H
#define ANDROID_AUDIO_HARDWARE_H

#include <stdint.h>
#include <sys/types.h>

#include <utils/threads.h>
#include <utils/SortedVector.h>

#include <hardware_legacy/AudioHardwareBase.h>

namespace android {

#define CODEC_TYPE_PCM 0
#define PCM_FILL_BUFFER_COUNT 1
#define AUDIO_HW_NUM_OUT_BUF 2  // Number of buffers in audio driver for output

// TODO: determine actual audio DSP and hardware latency
#define AUDIO_HW_OUT_LATENCY_MS 0  // Additionnal latency introduced by audio DSP and hardware in ms
#define AUDIO_HW_OUT_SAMPLERATE 44100 // Default audio output sample rate
#define AUDIO_HW_OUT_CHANNELS (AudioSystem::CHANNEL_OUT_STEREO) // Default audio output channel mask
#define AUDIO_HW_OUT_FORMAT (AudioSystem::PCM_16_BIT)  // Default audio output sample format
#define AUDIO_HW_OUT_BUFSZ 4096  // Default audio output buffer size

#if 0
#define AUDIO_HW_IN_SAMPLERATE 8000                 // Default audio input sample rate
#define AUDIO_HW_IN_CHANNELS (AudioSystem::CHANNEL_IN_MONO) // Default audio input channel mask
#define AUDIO_HW_IN_FORMAT (AudioSystem::PCM_16_BIT)  // Default audio input sample format
#define AUDIO_HW_IN_BUFSZ 256  // Default audio input buffer size

#define VOICE_VOLUME_MAX 5  // Maximum voice volume
#endif

class AudioHardware : public  AudioHardwareBase
{
    class AudioStreamOutQ5V2;

public:
                        AudioHardware();
    virtual             ~AudioHardware();
    virtual status_t    initCheck();

    virtual status_t    setVoiceVolume(float volume);
    virtual status_t    setMasterVolume(float volume);

    virtual status_t    setMode(int mode);

    virtual status_t    setMicMute(bool state);
    virtual status_t    getMicMute(bool* state);

    virtual status_t    setParameters(const String8& keyValuePairs);
    virtual String8     getParameters(const String8& keys);

    virtual AudioStreamOut* openOutputStream(
                                uint32_t devices,
                                int *format=0,
                                uint32_t *channels=0,
                                uint32_t *sampleRate=0,
                                status_t *status=0);

    virtual AudioStreamIn* openInputStream(
                                uint32_t devices,
                                int *format,
                                uint32_t *channels,
                                uint32_t *sampleRate,
                                status_t *status,
                                AudioSystem::audio_in_acoustics acoustics);

    virtual    void        closeOutputStream(AudioStreamOut* out);
    virtual    void        closeInputStream(AudioStreamIn* in);

    virtual size_t getInputBufferSize(uint32_t sampleRate, int format, int channelCount);

    void clearCurDevice() { }

protected:
    virtual status_t    dump(int fd, const Vector<String16>& args);

private:

    class AudioStreamOutQ5V2 : public AudioStreamOut {
    public:
                            AudioStreamOutQ5V2();
        virtual             ~AudioStreamOutQ5V2();
                status_t    set(AudioHardware* mHardware,
                                uint32_t devices,
                                int *pFormat,
                                uint32_t *pChannels,
                                uint32_t *pRate);
        virtual uint32_t    sampleRate() const { return mSampleRate; }
        // must be 32-bit aligned
        virtual size_t      bufferSize() const { return mBufferSize; }
        virtual uint32_t    channels() const { return mChannels; }
        virtual int         format() const { return AUDIO_HW_OUT_FORMAT; }
        virtual uint32_t    latency() const { return (1000*AUDIO_HW_NUM_OUT_BUF*(bufferSize()/frameSize()))/sampleRate()+AUDIO_HW_OUT_LATENCY_MS; }
        virtual status_t    setVolume(float left, float right) { return INVALID_OPERATION; }
        virtual ssize_t     write(const void* buffer, size_t bytes);
        virtual status_t    standby();
        virtual status_t    dump(int fd, const Vector<String16>& args);
                bool        checkStandby();
        virtual status_t    setParameters(const String8& keyValuePairs);
        virtual String8     getParameters(const String8& keys);
                uint32_t    devices() { return mDevices; }
        virtual status_t    getRenderPosition(uint32_t *dspFrames);

    private:
                AudioHardware* mHardware;
                int         mFd;
                int         mStartCount;
                int         mRetryCount;
                bool        mStandby;
                uint32_t    mDevices;
                uint32_t    mChannels;
                uint32_t    mSampleRate;
                size_t      mBufferSize;
    };

            bool        mInit;
            bool        mMicMute;

            AudioStreamOutQ5V2*  mOutput;
            Mutex       mLock;
};


}; // namespace android

#endif // ANDROID_AUDIO_HARDWARE_MSM72XX_H