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/*
**
** Copyright 2012, 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_STREAM_IN_H
#define ANDROID_AUDIO_STREAM_IN_H
#include <audio_utils/resampler.h>
#include <hardware/audio.h>
#include <tinyalsa/asoundlib.h>
#include <utils/Errors.h>
#include <utils/threads.h>
#include "AudioHotplugThread.h"
namespace android {
class AudioHardwareInput;
class AudioStreamIn {
public:
AudioStreamIn(AudioHardwareInput& owner);
~AudioStreamIn();
uint32_t getSampleRate();
status_t setSampleRate(uint32_t rate);
size_t getBufferSize();
uint32_t getChannelMask();
audio_format_t getFormat();
status_t setFormat(audio_format_t format);
status_t standby();
status_t dump(int fd);
status_t setParameters(struct audio_stream* stream,
const char* kvpairs);
char* getParameters(const char* keys);
status_t setGain(float gain);
ssize_t read(void* buffer, size_t bytes);
uint32_t getInputFramesLost();
status_t addAudioEffect(effect_handle_t effect);
status_t removeAudioEffect(effect_handle_t effect);
status_t set(audio_format_t *pFormat,
uint32_t *pChannelMask,
uint32_t *pRate);
const AudioHotplugThread::DeviceInfo* getDeviceInfo() { return mCurrentDeviceInfo; };
private:
static const uint32_t kChannelMask;
static const uint32_t kChannelCount;
static const audio_format_t kAudioFormat;
static uint32_t getChannelCount() {
return audio_channel_count_from_in_mask(kChannelMask);
}
static uint32_t getFrameSize() {
return getChannelCount() * audio_bytes_per_sample(kAudioFormat);
}
void setRemoteControlMicEnabled(bool flag);
status_t startInputStream_l();
status_t standby_l();
ssize_t readFrames_l(void* buffer, ssize_t frames);
// resampler buffer provider thunks
static int getNextBufferThunk(
struct resampler_buffer_provider* bufferProvider,
struct resampler_buffer* buffer);
static void releaseBufferThunk(
struct resampler_buffer_provider* bufferProvider,
struct resampler_buffer* buffer);
// resampler buffer provider methods
int getNextBuffer(struct resampler_buffer* buffer);
void releaseBuffer(struct resampler_buffer* buffer);
static const int kPeriodCount;
AudioHardwareInput& mOwnerHAL;
const AudioHotplugThread::DeviceInfo* mCurrentDeviceInfo;
Mutex mLock;
uint32_t mRequestedSampleRate;
bool mStandby;
bool mDisabled;
struct pcm* mPcm;
struct pcm_config mPcmConfig;
struct resampler_itfe* mResampler;
struct ResamplerBufferProviderWrapper {
struct resampler_buffer_provider provider;
AudioStreamIn* thiz;
} mResamplerProviderWrapper;
int16_t* mBuffer;
size_t mBufferSize;
int mInputSource;
int mReadStatus;
unsigned int mFramesIn;
};
}; // namespace android
#endif // ANDROID_AUDIO_STREAM_IN_H
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