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https://github.com/ZDoom/raze-gles.git
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027afc2347
This fixes an issue where rapidly changing the player's angle could result in the audio "popping" due to the sudden change to a new position in the volume table, and the resulting difference in volume between one sample and the next. This also fixes a DC offset issue when applying the volume level to certain sample types. git-svn-id: https://svn.eduke32.com/eduke32@7773 1a8010ca-5511-0410-912e-c29ae57300e0
244 lines
6.4 KiB
C++
244 lines
6.4 KiB
C++
/*
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Copyright (C) 1994-1995 Apogee Software, Ltd.
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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.
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See the 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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*/
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/**********************************************************************
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file: _MULTIVC.H
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author: James R. Dose
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date: December 20, 1993
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Private header for MULTIVOC.C
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(c) Copyright 1993 James R. Dose. All Rights Reserved.
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**********************************************************************/
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#ifndef MULTIVC_H_
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#define MULTIVC_H_
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#include "multivoc.h"
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#define VOC_8BIT 0x0
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#define VOC_16BIT 0x4
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#define T_SIXTEENBIT_STEREO 0
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#define T_MONO 2
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#define T_16BITSOURCE 4
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#define T_STEREOSOURCE 8
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#define T_DEFAULT T_SIXTEENBIT_STEREO
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#define MV_MAXPANPOSITION 127 /* formerly 31 */
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#define MV_NUMPANPOSITIONS ( MV_MAXPANPOSITION + 1 )
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#define MV_MAXTOTALVOLUME 255
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#define MV_MAXVOLUME 127 /* formerly 63 */
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// mirrors FX_MUSIC_PRIORITY from fx_man.h
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#define MV_MUSIC_PRIORITY INT_MAX
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#define MIX_VOLUME(volume) ((max(0, min((volume), 255)) * (MV_MAXVOLUME + 1)) >> 8)
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extern float MV_GlobalVolume;
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extern float MV_VolumeSmooth;
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static FORCE_INLINE float SMOOTH_VOLUME(float const volume, float const dest)
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{
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return volume + (dest - volume) * MV_VolumeSmooth;
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}
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template <typename T>
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static inline conditional_t< is_signed<T>::value, make_unsigned_t<T>, make_signed_t<T> > FLIP_SIGN(T src)
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{
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static constexpr make_unsigned_t<T> msb = ((make_unsigned_t<T>)1) << (sizeof(T) * CHAR_BIT - 1u);
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return src ^ msb;
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}
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template <typename T>
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static inline enable_if_t<is_signed<T>::value, T> SCALE_SAMPLE(T src, float volume)
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{
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return (T)Blrintf((float)src * volume);
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}
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template <typename T>
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static inline enable_if_t<is_unsigned<T>::value, T> SCALE_SAMPLE(T src, float volume)
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{
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return FLIP_SIGN(SCALE_SAMPLE(FLIP_SIGN(src), volume));
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}
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struct split16_t
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{
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explicit split16_t(uint16_t x) : v{x} {}
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uint8_t l() const
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{
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return (v & 0x00FFu);
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}
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uint8_t h() const
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{
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return (v & 0xFF00u) >> CHAR_BIT;
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}
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private:
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uint16_t v;
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};
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#define MV_MIXBUFFERSIZE 256
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#define MV_NUMBEROFBUFFERS 16
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#define MV_TOTALBUFFERSIZE ( MV_MIXBUFFERSIZE * MV_NUMBEROFBUFFERS )
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typedef enum
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{
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NoMoreData,
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KeepPlaying
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} playbackstatus;
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typedef struct VoiceNode
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{
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struct VoiceNode *next;
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struct VoiceNode *prev;
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playbackstatus (*GetSound)(struct VoiceNode *);
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uint32_t (*mix)(struct VoiceNode *, uint32_t);
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const char *sound;
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float LeftVolume, LeftVolumeDest;
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float RightVolume, RightVolumeDest;
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void *rawdataptr;
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const char *NextBlock;
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const char *LoopStart;
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const char *LoopEnd;
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wavefmt_t wavetype;
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char bits;
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char channels;
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float volume;
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unsigned LoopCount;
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uint32_t LoopSize;
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uint32_t BlockLength;
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int32_t ptrlength; // ptrlength-1 is the max permissible index for rawdataptr
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uint32_t PitchScale;
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uint32_t FixedPointBufferSize;
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uint32_t length;
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uint32_t SamplingRate;
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uint32_t RateScale;
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uint32_t position;
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int32_t Paused;
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int32_t handle;
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int32_t priority;
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intptr_t callbackval;
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} VoiceNode;
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typedef struct
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{
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uint8_t left;
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uint8_t right;
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} Pan;
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typedef struct
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{
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char RIFF[4];
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uint32_t file_size;
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char WAVE[4];
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char fmt[4];
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uint32_t format_size;
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} riff_header;
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typedef struct
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{
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uint16_t wFormatTag;
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uint16_t nChannels;
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uint32_t nSamplesPerSec;
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uint32_t nAvgBytesPerSec;
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uint16_t nBlockAlign;
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uint16_t nBitsPerSample;
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} format_header;
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typedef struct
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{
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uint8_t DATA[4];
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uint32_t size;
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} data_header;
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extern Pan MV_PanTable[ MV_NUMPANPOSITIONS ][ MV_MAXVOLUME + 1 ];
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extern int32_t MV_ErrorCode;
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extern int32_t MV_Installed;
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extern int32_t MV_MixRate;
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#define MV_SetErrorCode(status) MV_ErrorCode = (status);
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void MV_PlayVoice(VoiceNode *voice);
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VoiceNode *MV_AllocVoice(int32_t priority);
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void MV_SetVoiceMixMode(VoiceNode *voice);
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void MV_SetVoiceVolume(VoiceNode *voice, int32_t vol, int32_t left, int32_t right, float volume);
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void MV_SetVoicePitch(VoiceNode *voice, uint32_t rate, int32_t pitchoffset);
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int32_t MV_GetVorbisPosition(VoiceNode *voice);
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void MV_SetVorbisPosition(VoiceNode *voice, int32_t position);
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int32_t MV_GetFLACPosition(VoiceNode *voice);
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void MV_SetFLACPosition(VoiceNode *voice, int32_t position);
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int32_t MV_GetXAPosition(VoiceNode *voice);
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void MV_SetXAPosition(VoiceNode *voice, int32_t position);
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int32_t MV_GetXMPPosition(VoiceNode *voice);
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void MV_SetXMPPosition(VoiceNode *voice, int32_t position);
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void MV_ReleaseVorbisVoice(VoiceNode *voice);
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void MV_ReleaseFLACVoice(VoiceNode *voice);
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void MV_ReleaseXAVoice(VoiceNode *voice);
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void MV_ReleaseXMPVoice(VoiceNode *voice);
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// implemented in mix.c
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uint32_t MV_Mix16BitMono(struct VoiceNode *voice, uint32_t length);
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uint32_t MV_Mix16BitStereo(struct VoiceNode *voice, uint32_t length);
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uint32_t MV_Mix16BitMono16(struct VoiceNode *voice, uint32_t length);
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uint32_t MV_Mix16BitStereo16(struct VoiceNode *voice, uint32_t length);
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void MV_16BitReverb(char const *src, char *dest, const float volume, int32_t count);
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// implemented in mixst.c
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uint32_t MV_Mix16BitMono8Stereo(struct VoiceNode *voice, uint32_t length);
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uint32_t MV_Mix16BitStereo8Stereo(struct VoiceNode *voice, uint32_t length);
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uint32_t MV_Mix16BitMono16Stereo(struct VoiceNode *voice, uint32_t length);
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uint32_t MV_Mix16BitStereo16Stereo(struct VoiceNode *voice, uint32_t length);
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extern char *MV_MixDestination; // pointer to the next output sample
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extern int32_t MV_SampleSize;
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extern int32_t MV_RightChannelOffset;
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#define loopStartTagCount 3
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extern const char *loopStartTags[loopStartTagCount];
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#define loopEndTagCount 2
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extern const char *loopEndTags[loopEndTagCount];
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#define loopLengthTagCount 2
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extern const char *loopLengthTags[loopLengthTagCount];
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#if defined __POWERPC__ || defined GEKKO
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# define BIGENDIAN
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#endif
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#endif
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