mirror of
https://github.com/libretro/scummvm.git
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141 lines
4.3 KiB
C++
141 lines
4.3 KiB
C++
/* ScummVM - Scumm Interpreter
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* Copyright (C) 2002-2003 The ScummVM project
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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*
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* $Header$
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*
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*/
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#ifndef SMUSH_CHANNEL_H
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#define SMUSH_CHANNEL_H
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#include "common/engine.h"
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class Chunk;
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class ContChunk;
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class SmushChannel {
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public:
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virtual ~SmushChannel() {};
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virtual bool appendData(Chunk &b, int32 size) = 0;
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virtual bool setParameters(int32, int32, int32, int32) = 0;
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virtual bool checkParameters(int32, int32, int32, int32, int32) = 0;
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virtual bool isTerminated() const = 0;
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virtual int32 availableSoundData() const = 0;
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virtual void getSoundData(int16 *sound_buffer, int32 size) = 0;
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virtual void getSoundData(int8 *sound_buffer, int32 size) = 0;
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virtual int32 getRate() = 0;
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virtual bool getParameters(int32 &rate, bool &stereo, bool &is_16bit) = 0;
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virtual int32 getTrackIdentifier() const = 0;
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};
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class SaudChannel : public SmushChannel {
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private:
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int32 _track;
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int32 _nbframes;
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int32 _dataSize;
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int32 _frequency;
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bool _inData;
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bool _markReached;
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int32 _flags;
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int32 _volume;
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int32 _balance;
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int32 _index;
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int16 _voltable[2][256];
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byte *_tbuffer;
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int32 _tbufferSize;
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byte *_sbuffer;
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int32 _sbufferSize;
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protected:
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void handleStrk(Chunk &c);
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void handleSmrk(Chunk &c);
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void handleShdr(Chunk &c);
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bool handleSubTags(int32 &offset);
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bool processBuffer();
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void recalcVolumeTable();
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public:
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SaudChannel(int32 track, int32 freq);
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virtual ~SaudChannel();
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bool isTerminated() const;
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bool setParameters(int32 duration, int32 flags, int32 vol1, int32 vol2);
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bool checkParameters(int32 index, int32 duration, int32 flags, int32 vol1, int32 vol2);
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bool appendData(Chunk &b, int32 size);
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int32 availableSoundData() const;
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void getSoundData(int16 *sound_buffer, int32 size);
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void getSoundData(int8 *sound_buffer, int32 size) { error("16bit request for SAUD channel should never happen"); };
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int32 getRate() { return _frequency; }
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bool getParameters(int32 &rate, bool &stereo, bool &is_16bit) {
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rate = _frequency;
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stereo = true;
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is_16bit = true;
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return true;
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};
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virtual int32 getTrackIdentifier() const { return _track; };
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};
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class ImuseChannel : public SmushChannel {
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private:
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int32 _track; //!< the track number
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byte *_tbuffer; //!< data temporary buffer
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int32 _tbufferSize; //!< temporary buffer size
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byte *_sbuffer; //!< sound buffer
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int32 _sbufferSize; //!< sound buffer size
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int32 _srbufferSize;
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int32 _frequency; //!< the target frequency of the ::mixer
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int32 _dataSize; //!< remaining size of sound data in the iMUS buffer
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bool _inData;
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int32 _volume;
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int32 _bitsize; //!< the bitsize of the original data
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int32 _rate; //!< the sampling rate of the original data
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int32 _channels; //!< the number of channels of the original data
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protected:
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int32 decode(int32 size, int32 &ret);
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void decode();
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bool processBuffer();
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bool handleMap(Chunk &);
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bool handleFormat(Chunk &);
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bool handleText(Chunk &);
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bool handleRegion(Chunk &);
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bool handleStop(Chunk &);
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bool handleSubTags(int32 & offset);
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public:
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ImuseChannel(int32 track, int32 freq);
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virtual ~ImuseChannel();
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bool isTerminated() const;
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bool setParameters(int32 nbframes, int32 size, int32 track_flags, int32 unk1);
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bool checkParameters(int32 index, int32 nbframes, int32 size, int32 track_flags, int32 unk1);
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bool appendData(Chunk &b, int32 size);
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int32 availableSoundData() const;
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void getSoundData(int16 *sound_buffer, int32 size);
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void getSoundData(int8 *sound_buffer, int32 size);
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int32 getRate() { return _rate; }
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bool getParameters(int32 &rate, bool &stereo, bool &is_16bit) {
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rate = _frequency;
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stereo = (_channels == 2);
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is_16bit = (_bitsize > 8);
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return true;
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};
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virtual int32 getTrackIdentifier() const { return _track; };
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};
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#endif
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