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engines/scumm/imuse_digi/dimuse_internalmixer.h

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+/* 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