AMRAudioEncoder.hh

/*
 * Copyright (C) 2005-2006 WIS Technologies International Ltd.
 *
 * Permission is hereby granted, free of charge, to any person obtaining a
 * copy of this software and the associated README documentation file (the
 * "Software"), to deal in the Software without restriction, including
 * without limitation the rights to use, copy, modify, merge, publish,
 * distribute, sublicense, and/or sell copies of the Software, and to
 * permit persons to whom the Software is furnished to do so.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
 * IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
 * CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
 * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
 * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 */
// "LIVE555 Streaming Media" interface to an AMR audio encoder.
// C++ header

#ifndef  _AMR_AUDIO_ENCODER_HH
#define _AMR_AUDIO_ENCODER_HH

#include "AMRAudioSource.hh"

class AMRAudioEncoder: public AMRAudioSource {
public:
  static AMRAudioEncoder* createNew(UsageEnvironment& env,
				    FramedSource* inputPCMSource, unsigned numChannels);

protected:
  AMRAudioEncoder(UsageEnvironment& env, FramedSource* inputPCMSource, unsigned numChannels);
      // called only by createNew()
  virtual ~AMRAudioEncoder();

private:
  // redefined virtual functions:
  virtual void doGetNextFrame();
  virtual void doStopGettingFrames();

private:
  static void afterGettingFrame(void* clientData, unsigned frameSize,
                                unsigned numTruncatedBytes,
                                struct timeval presentationTime,
                                unsigned durationInMicroseconds);
  void afterGettingFrame1(unsigned frameSize,
                          unsigned numTruncatedBytes,
                          struct timeval presentationTime,
                          unsigned durationInMicroseconds);

private:
  FramedSource* fInputPCMSource;
  void* fEncoderState;
  double fMicrosecondsPerByte;
  unsigned char* fInputSampleBuffer;
  unsigned fInputSampleBufferSize;
  unsigned fInputSampleBufferBytesDesired, fInputSampleBufferBytesFull;
  struct timeval fLastInputDataPresentationTime;
};

#endif