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  • Committer: tuehaste
  • Date: 2002-02-26 11:12:07 UTC
  • Revision ID: vcs-imports@canonical.com-20020226111207-5rly26cj9gdd19ba
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mixxx/mixxx/player.cpp
 
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/***************************************************************************
 
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                          player.cpp  -  description
 
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                             -------------------
 
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    begin                : Wed Feb 20 2002
 
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    copyright            : (C) 2002 by Tue and Ken Haste Andersen
 
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    email                : 
 
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 ***************************************************************************/
 
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/***************************************************************************
 
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 *                                                                         *
 
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 *   This program is free software; you can redistribute it and/or modify  *
 
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 *   it under the terms of the GNU General Public License as published by  *
 
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 *   the Free Software Foundation; either version 2 of the License, or     *
 
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 *   (at your option) any later version.                                   *
 
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 *                                                                         *
 
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 ***************************************************************************/
 
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#include "player.h"
 
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/* -------- ------------------------------------------------------
 
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   Purpose: Initializes the audio hardware.
 
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   Input:   Size of the output buffer in samples
 
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   Output:  Pointer to internal synthesis data structure.
 
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   -------- ------------------------------------------------------ */
 
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Player::Player(int size)
 
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{
 
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        qDebug("Player: init...");
 
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}
 
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/* -------- ------------------------------------------------------
 
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   Purpose: Terminate and deallocate the synthesis system
 
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   Input:   -
 
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   Output:  -
 
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   -------- ------------------------------------------------------ */
 
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Player::~Player()
 
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{
 
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        deallocate();
 
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}
 
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void Player::allocate()
 
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{
 
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        // Allocate buffers
 
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        out_buffer = new SAMPLE[BUFFER_SIZE];
 
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        process_buffer = new CSAMPLE[BUFFER_SIZE];
 
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        tmp1 = new CSAMPLE[BUFFER_SIZE];
 
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        tmp2 = new CSAMPLE[BUFFER_SIZE];
 
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}
 
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void Player::deallocate()
 
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{
 
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        delete [] tmp2;
 
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        delete [] tmp1;
 
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        delete [] process_buffer;
 
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        delete [] out_buffer;
 
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}
 
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/* -------- ------------------------------------------------------
 
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   Purpose: Start the audio stream
 
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   Input:   Internal synth datastructure
 
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   Output:
 
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   -------- ------------------------------------------------------ */
 
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void Player::start(EngineBuffer *_reader) {
 
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        reader = _reader;
 
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        // Initialize position in readbuffer:
 
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        play_pos = 0;
 
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}
 
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/* -------- ------------------------------------------------------
 
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   Purpose: Internal callback function used for preparing samples
 
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            for playback. This is where the synthesis is done.
 
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   Input:   -
 
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   Output:  -
 
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   -------- ------------------------------------------------------ */
 
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int Player::prepareBuffer() {
 
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  // ----------------------------------------------------
 
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  // Do the processing.
 
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  // ----------------------------------------------------
 
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  // Resample; the linear interpolation is done in readfile:
 
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  reader->process(0, process_buffer, BUFFER_SIZE);
 
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  // Convert the signal back to SAMPLE and write to the sound cards buffer:
 
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  for (int i=0; i<BUFFER_SIZE; i++)
 
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    out_buffer[i] = (SAMPLE)(0.5*process_buffer[i]);
 
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  return 0; // Hack. Should only return 0 when not at end of file
 
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}