dimuse_internalmixer.h

/* ScummVM - Graphic Adventure Engine
 *
 * ScummVM is the legal property of its developers, whose names
 * are too numerous to list here. Please refer to the COPYRIGHT
 * file distributed with this source distribution.
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 *
 */

#if !defined(SCUMM_IMUSE_DIGI_MIXER_H) && defined(ENABLE_SCUMM_7_8)
#define SCUMM_IMUSE_DIGI_MIXER_H

#include "common/scummsys.h"
#include "common/mutex.h"
#include "common/serializer.h"
#include "common/textconsole.h"
#include "common/util.h"

#include "scumm/imuse_digi/dimuse_engine.h"
#include "scumm/music.h"
#include "scumm/sound.h"
#include "audio/mixer.h"
#include "audio/audiostream.h"

namespace Audio {
class AudioStream;
class Mixer;
class QueuingAudioStream;
}

namespace Scumm {

class IMuseDigiInternalMixer {

private:
    int32 *_amp8Table = nullptr;
    int32 *_amp12Table = nullptr;
    int32 *_softLMID = nullptr;
    int32 *_softLTable = nullptr;

    uint8 *_mixBuf = nullptr;

    Audio::Mixer *_mixer;
    Audio::SoundHandle _channelHandle;
    int _mixBufSize = 0;
    int _radioChatter = 0;
    int _outWordSize = 0;
    int _outChannelCount = 0;
    int _sampleRate = 0;
    int _stereoReverseFlag = 0;
    bool _isEarlyDiMUSE = false;
    bool _lowLatencyMode = false;

    void mixBits8Mono(uint8 *srcBuf, int32 inFrameCount, int feedSize, int32 mixBufStartIndex, int32 *ampTable, bool ftIs11025Hz);
    void mixBits12Mono(uint8 *srcBuf, int32 inFrameCount, int feedSize, int32 mixBufStartIndex, int32 *ampTable);
    void mixBits16Mono(uint8 *srcBuf, int32 inFrameCount, int feedSize, int32 mixBufStartIndex, int32 *ampTable);

    void mixBits8ConvertToMono(uint8 *srcBuf, int32 inFrameCount, int feedSize, int32 mixBufStartIndex, int32 *ampTable);
    void mixBits12ConvertToMono(uint8 *srcBuf, int32 inFrameCount, int feedSize, int32 mixBufStartIndex, int32 *ampTable);
    void mixBits16ConvertToMono(uint8 *srcBuf, int32 inFrameCount, int feedSize, int32 mixBufStartIndex, int32 *ampTable);

    void mixBits8ConvertToStereo(uint8 *srcBuf, int32 inFrameCount, int feedSize, int32 mixBufStartIndex, int32 *leftAmpTable, int32 *rightAmpTable, bool ftIs11025Hz);
    void mixBits12ConvertToStereo(uint8 *srcBuf, int32 inFrameCount, int feedSize, int32 mixBufStartIndex, int32 *leftAmpTable, int32 *rightAmpTable);
    void mixBits16ConvertToStereo(uint8 *srcBuf, int32 inFrameCount, int feedSize, int32 mixBufStartIndex, int32 *leftAmpTable, int32 *rightAmpTable);

    void mixBits8Stereo(uint8 *srcBuf, int32 inFrameCount, int feedSize, int32 mixBufStartIndex, int32 *ampTable);
    void mixBits12Stereo(uint8 *srcBuf, int32 inFrameCount, int feedSize, int32 mixBufStartIndex, int32 *ampTable);
    void mixBits16Stereo(uint8 *srcBuf, int32 inFrameCount, int feedSize, int32 mixBufStartIndex, int32 *ampTable);

public:
    IMuseDigiInternalMixer(Audio::Mixer *mixer, int sampleRate, bool isEarlyDiMUSE, bool lowLatencyMode = false);
    ~IMuseDigiInternalMixer();
    int  init(int bytesPerSample, int numChannels, uint8 *mixBuf, int mixBufSize, int sizeSampleKB, int mixChannelsNum);
    void setRadioChatter();
    void clearRadioChatter();
    int  clearMixerBuffer();

    void mix(uint8 *srcBuf, int32 inFrameCount, int wordSize, int channelCount, int feedSize, int32 mixBufStartIndex, int volume, int pan, bool ftIs11025Hz);
    int  loop(uint8 **destBuffer, int len);
    Audio::QueuingAudioStream *_stream;

    // For low latency audio
    void setCurrentMixerBuffer(uint8 *newBuf);
    void endStream(int idx);
    Audio::QueuingAudioStream *getStream(int idx);

    Audio::QueuingAudioStream *_separateStreams[DIMUSE_MAX_TRACKS];
    Audio::SoundHandle _separateChannelHandles[DIMUSE_MAX_TRACKS];
};

} // End of namespace Scumm

#endif