diff --git a/source/CMakeLists.txt b/source/CMakeLists.txt index e587d550f..63169478b 100644 --- a/source/CMakeLists.txt +++ b/source/CMakeLists.txt @@ -1085,6 +1085,7 @@ set (PCH_SOURCES common/2d/v_2ddrawer.cpp common/2d/v_drawtext.cpp common/2d/v_draw.cpp + common/thirdparty/gain_analysis.cpp common/thirdparty/sfmt/SFMT.cpp common/fonts/singlelumpfont.cpp common/fonts/singlepicfont.cpp diff --git a/source/common/audio/music/i_music.h b/source/common/audio/music/i_music.h index b552f5c23..85be1dea2 100644 --- a/source/common/audio/music/i_music.h +++ b/source/common/audio/music/i_music.h @@ -56,4 +56,14 @@ EXTERN_CVAR(Bool, mus_enabled) EXTERN_CVAR(Float, snd_musicvolume) +inline float AmplitudeTodB(float amplitude) +{ + return 20.0f * log10(amplitude); +} + +inline float dBToAmplitude(float dB) +{ + return pow(10.0f, dB / 20.0f); +} + #endif //__I_MUSIC_H__ diff --git a/source/common/audio/music/music.cpp b/source/common/audio/music/music.cpp index c10474d90..1437ea83f 100644 --- a/source/common/audio/music/music.cpp +++ b/source/common/audio/music/music.cpp @@ -49,6 +49,10 @@ #include "s_music.h" #include "filereadermusicinterface.h" #include +#include "md5.h" +#include "gain_analysis.h" +#include "gameconfigfile.h" +#include "i_specialpaths.h" // EXTERNAL FUNCTION PROTOTYPES -------------------------------------------- @@ -77,6 +81,15 @@ static MusicCallbacks mus_cb = { nullptr, DefaultOpenMusic }; // PUBLIC DATA DEFINITIONS ------------------------------------------------- +EXTERN_CVAR(Int, snd_mididevice) + +CVAR(Bool, mus_calcgain, false, CVAR_ARCHIVE | CVAR_GLOBALCONFIG) // changing this will only take effect for the next song. +CVAR(Bool, mus_usereplaygain, false, CVAR_ARCHIVE | CVAR_GLOBALCONFIG) // changing this will only take effect for the next song. +CUSTOM_CVAR(Float, mus_gainoffset, 0.f, CVAR_ARCHIVE | CVAR_GLOBALCONFIG) // for customizing the base volume +{ + if (self > 10.f) self = 10.f; + mus_playing.replayGainFactor = dBToAmplitude(mus_playing.replayGain + mus_gainoffset); +} // CODE -------------------------------------------------------------------- @@ -115,9 +128,33 @@ void S_StopCustomStream(SoundStream *stream) } +static TArray convert; static bool FillStream(SoundStream* stream, void* buff, int len, void* userdata) { - bool written = ZMusic_FillStream(mus_playing.handle, buff, len); + bool written; + if (mus_playing.isfloat) + { + written = ZMusic_FillStream(mus_playing.handle, buff, len); + if (mus_playing.replayGainFactor != 1.f) + { + float* fbuf = (float*)buff; + for (int i = 0; i < len / 4; i++) + { + fbuf[i] *= mus_playing.replayGainFactor; + } + } + } + else + { + // To apply replay gain we need floating point streaming data, so 16 bit input needs to be converted here. + convert.Resize(len / 2); + written = ZMusic_FillStream(mus_playing.handle, convert.Data(), len/2); + float* fbuf = (float*)buff; + for (int i = 0; i < len / 4; i++) + { + fbuf[i] = convert[i] * mus_playing.replayGainFactor * (1.f/32768.f); + } + } if (!written) { @@ -133,9 +170,12 @@ void S_CreateStream() if (!mus_playing.handle) return; SoundStreamInfo fmt; ZMusic_GetStreamInfo(mus_playing.handle, &fmt); + // always create a floating point streaming buffer so we can apply replay gain without risk of integer overflows. + mus_playing.isfloat = fmt.mNumChannels > 0; + if (!mus_playing.isfloat) fmt.mBufferSize *= 2; if (fmt.mBufferSize > 0) // if buffer size is 0 the library will play the song itself (e.g. Windows system synth.) { - int flags = fmt.mNumChannels < 0 ? 0 : SoundStream::Float; + int flags = SoundStream::Float; if (abs(fmt.mNumChannels) < 2) flags |= SoundStream::Mono; musicStream.reset(GSnd->CreateStream(FillStream, fmt.mBufferSize, flags, fmt.mSampleRate, nullptr)); @@ -167,7 +207,7 @@ void S_StopStream() static bool S_StartMusicPlaying(ZMusic_MusicStream song, bool loop, float rel_vol, int subsong) { - if (rel_vol > 0.f) + if (rel_vol > 0.f && !mus_usereplaygain) { float factor = relative_volume / saved_relative_volume; saved_relative_volume = rel_vol; @@ -312,6 +352,255 @@ bool S_StartMusic (const char *m_id) // initiates playback of a song // //========================================================================== +static TMap gainMap; + +EXTERN_CVAR(String, fluid_patchset) +EXTERN_CVAR(String, timidity_config) +EXTERN_CVAR(String, midi_config) +EXTERN_CVAR(String, wildmidi_config) +EXTERN_CVAR(String, adl_custom_bank) +EXTERN_CVAR(Int, adl_bank) +EXTERN_CVAR(Bool, adl_use_custom_bank) +EXTERN_CVAR(String, opn_custom_bank) +EXTERN_CVAR(Bool, opn_use_custom_bank) +EXTERN_CVAR(Int, opl_core) + +static FString ReplayGainHash(ZMusicCustomReader* reader, int flength, int playertype, const char* _playparam) +{ + std::string playparam = _playparam; + + uint8_t buffer[50000]; // for performance reasons only hash the start of the file. If we wanted to do this to large waveform songs it'd cause noticable lag. + uint8_t digest[16]; + char digestout[33]; + auto length = reader->read(reader, buffer, 50000); + reader->seek(reader, 0, SEEK_SET); + MD5Context md5; + md5.Init(); + md5.Update(buffer, (int)length); + md5.Final(digest); + + for (size_t j = 0; j < sizeof(digest); ++j) + { + sprintf(digestout + (j * 2), "%02X", digest[j]); + } + digestout[32] = 0; + + auto type = ZMusic_IdentifyMIDIType((uint32_t*)buffer, 32); + if (type == MIDI_NOTMIDI) return FStringf("%d:%s", flength, digestout); + + // get the default for MIDI synth + if (playertype == -1) + { + switch (snd_mididevice) + { + case -1: playertype = MDEV_FLUIDSYNTH; break; + case -2: playertype = MDEV_TIMIDITY; break; + case -3: playertype = MDEV_OPL; break; + case -4: playertype = MDEV_GUS; break; + case -5: playertype = MDEV_FLUIDSYNTH; break; + case -6: playertype = MDEV_WILDMIDI; break; + case -7: playertype = MDEV_ADL; break; + case -8: playertype = MDEV_OPN; break; + default: return ""; + } + } + else if (playertype == MDEV_SNDSYS) return ""; + + // get the default for used sound font. + if (playparam.empty()) + { + switch (playertype) + { + case MDEV_FLUIDSYNTH: playparam = fluid_patchset; break; + case MDEV_TIMIDITY: playparam = timidity_config; break; + case MDEV_GUS: playparam = midi_config; break; + case MDEV_WILDMIDI: playparam = wildmidi_config; break; + case MDEV_ADL: playparam = adl_use_custom_bank ? *adl_custom_bank : std::to_string(adl_bank); break; + case MDEV_OPN: playparam = opn_use_custom_bank ? *opn_custom_bank : ""; break; + case MDEV_OPL: playparam = std::to_string(opl_core); break; + + } + } + return FStringf("%d:%s:%d:%s", flength, digestout, playertype, playparam.c_str()).MakeUpper(); +} + +static void SaveGains() +{ + auto path = M_GetAppDataPath(true); + path << "/replaygain.ini"; + FConfigFile gains(path); + TMap::Iterator it(gainMap); + TMap::Pair* pair; + + if (gains.SetSection("Gains", true)) + { + while (it.NextPair(pair)) + { + gains.SetValueForKey(pair->Key, std::to_string(pair->Value).c_str()); + } + } + gains.WriteConfigFile(); +} + +static void ReadGains() +{ + static bool done = false; + if (done) return; + done = true; + auto path = M_GetAppDataPath(true); + path << "/replaygain.ini"; + FConfigFile gains(path); + if (gains.SetSection("Gains")) + { + const char* key; + const char* value; + + while (gains.NextInSection(key, value)) + { + gainMap.Insert(key, (float)strtod(value, nullptr)); + } + } +} + +CCMD(setreplaygain) +{ + // sets replay gain for current song to a fixed value + if (!mus_playing.handle || mus_playing.hash.IsEmpty()) + { + Printf("setreplaygain needs some music playing\n"); + return; + } + if (argv.argc() < 2) + { + Printf("Usage: setreplaygain {dB}\n"); + Printf("Current replay gain is %f dB\n", mus_playing.replayGain); + return; + } + float dB = (float)strtod(argv[1], nullptr); + if (dB > 10) dB = 10; // don't blast the speakers. Values above 2 or 3 are very rare. + gainMap.Insert(mus_playing.hash, dB); + SaveGains(); + mus_playing.replayGain = dB; + mus_playing.replayGainFactor = (float)dBToAmplitude(mus_playing.replayGain + mus_gainoffset); +} + +static void CheckReplayGain(const char *musicname, EMidiDevice playertype, const char *playparam) +{ + mus_playing.replayGain = 0.f; + mus_playing.replayGainFactor = dBToAmplitude(mus_gainoffset); + if (!mus_usereplaygain) return; + + FileReader reader = mus_cb.OpenMusic(musicname); + if (!reader.isOpen()) return; + int flength = (int)reader.GetLength(); + auto mreader = GetMusicReader(reader); // this passes the file reader to the newly created wrapper. + + ReadGains(); + auto hash = ReplayGainHash(mreader, flength, playertype, playparam); + if (hash.IsEmpty()) return; // got nothing to measure. + mus_playing.hash = hash; + auto entry = gainMap.CheckKey(hash); + if (entry) + { + mus_playing.replayGain = *entry; + mus_playing.replayGainFactor = dBToAmplitude(mus_playing.replayGain + mus_gainoffset); + return; + } + if (!mus_calcgain) return; + + auto handle = ZMusic_OpenSong(mreader, playertype, playparam); + if (handle == nullptr) return; // not a music file + + if (!ZMusic_Start(handle, 0, false)) + { + ZMusic_Close(handle); + return; // unable to open + } + + SoundStreamInfo fmt; + ZMusic_GetStreamInfo(handle, &fmt); + if (fmt.mBufferSize == 0) + { + ZMusic_Close(handle); + return; // external player. + } + + int flags = SoundStream::Float; + if (abs(fmt.mNumChannels) < 2) flags |= SoundStream::Mono; + + TArray readbuffer(fmt.mBufferSize, true); + TArray lbuffer; + TArray rbuffer; + while (ZMusic_FillStream(handle, readbuffer.Data(), fmt.mBufferSize)) + { + unsigned index; + // 4 cases, all with different preparation needs. + if (fmt.mNumChannels == -2) // 16 bit stereo + { + int16_t* sbuf = (int16_t*)readbuffer.Data(); + int numsamples = fmt.mBufferSize / 4; + index = lbuffer.Reserve(numsamples); + rbuffer.Reserve(numsamples); + + for (int i = 0; i < numsamples; i++) + { + lbuffer[index + i] = sbuf[i * 2]; + rbuffer[index + i] = sbuf[i * 2 + 1]; + } + } + else if (fmt.mNumChannels == -1) // 16 bit mono + { + int16_t* sbuf = (int16_t*)readbuffer.Data(); + int numsamples = fmt.mBufferSize / 2; + index = lbuffer.Reserve(numsamples); + + for (int i = 0; i < numsamples; i++) + { + lbuffer[index + i] = sbuf[i]; + } + } + else if (fmt.mNumChannels == 1) // float mono + { + float* sbuf = (float*)readbuffer.Data(); + int numsamples = fmt.mBufferSize / 4; + index = lbuffer.Reserve(numsamples); + for (int i = 0; i < numsamples; i++) + { + lbuffer[index + i] = sbuf[i] * 32768.f; + } + } + else if (fmt.mNumChannels == 2) // float stereo + { + float* sbuf = (float*)readbuffer.Data(); + int numsamples = fmt.mBufferSize / 8; + auto index = lbuffer.Reserve(numsamples); + rbuffer.Reserve(numsamples); + + for (int i = 0; i < numsamples; i++) + { + lbuffer[index + i] = sbuf[i * 2] * 32768.f; + rbuffer[index + i] = sbuf[i * 2 + 1] * 32768.f; + } + } + float accTime = lbuffer.Size() / (float)fmt.mSampleRate; + if (accTime > 8 * 60) break; // do at most 8 minutes, if the song forces a loop. + } + ZMusic_Close(handle); + + GainAnalyzer analyzer; + analyzer.InitGainAnalysis(fmt.mSampleRate); + int result = analyzer.AnalyzeSamples(lbuffer.Data(), rbuffer.Size() == 0 ? nullptr : rbuffer.Data(), lbuffer.Size(), rbuffer.Size() == 0? 1: 2); + if (result == GAIN_ANALYSIS_OK) + { + auto gain = analyzer.GetTitleGain(); + Printf("Calculated replay gain for %s at %f dB\n", hash.GetChars(), gain); + + gainMap.Insert(hash, gain); + mus_playing.replayGain = gain; + mus_playing.replayGainFactor = dBToAmplitude(mus_playing.replayGain + mus_gainoffset); + SaveGains(); + } +} bool S_ChangeMusic(const char* musicname, int order, bool looping, bool force) { @@ -397,6 +686,8 @@ bool S_ChangeMusic(const char* musicname, int order, bool looping, bool force) } else { + + CheckReplayGain(musicname, devp ? (EMidiDevice)devp->device : MDEV_DEFAULT, devp ? devp->args.GetChars() : ""); auto mreader = GetMusicReader(reader); // this passes the file reader to the newly created wrapper. mus_playing.handle = ZMusic_OpenSong(mreader, devp ? (EMidiDevice)devp->device : MDEV_DEFAULT, devp ? devp->args.GetChars() : ""); if (mus_playing.handle == nullptr) diff --git a/source/common/audio/music/music_config.cpp b/source/common/audio/music/music_config.cpp index e0b341b0a..935d93d80 100644 --- a/source/common/audio/music/music_config.cpp +++ b/source/common/audio/music/music_config.cpp @@ -453,6 +453,11 @@ CUSTOM_CVAR(Int, snd_streambuffersize, 64, CVAR_ARCHIVE | CVAR_GLOBALCONFIG | CV CUSTOM_CVAR(Int, mod_samplerate, 0, CVAR_ARCHIVE | CVAR_GLOBALCONFIG | CVAR_VIRTUAL) { + if (self != 0 && self != 11025 && self != 22050 && self != 44100 && self != 48000) + { + self = 0; + return; + } FORWARD_CVAR(mod_samplerate); } diff --git a/source/common/audio/music/s_music.h b/source/common/audio/music/s_music.h index 8b6e33188..ef852273c 100644 --- a/source/common/audio/music/s_music.h +++ b/source/common/audio/music/s_music.h @@ -73,8 +73,12 @@ struct MusPlayingInfo FString name; ZMusic_MusicStream handle; int baseorder; + float replayGain; + float replayGainFactor; bool loop; + bool isfloat; FString LastSong; // last music that was played + FString hash; // for setting replay gain while playing. }; extern MusPlayingInfo mus_playing; diff --git a/source/common/audio/sound/i_sound.cpp b/source/common/audio/sound/i_sound.cpp index 209f58a47..6855ce51b 100644 --- a/source/common/audio/sound/i_sound.cpp +++ b/source/common/audio/sound/i_sound.cpp @@ -51,11 +51,18 @@ EXTERN_CVAR (Float, snd_sfxvolume) EXTERN_CVAR(Float, snd_musicvolume) -CVAR (Int, snd_samplerate, 0, CVAR_ARCHIVE|CVAR_GLOBALCONFIG) -CVAR (Int, snd_buffersize, 0, CVAR_ARCHIVE|CVAR_GLOBALCONFIG) -CVAR (Int, snd_hrtf, -1, CVAR_ARCHIVE|CVAR_GLOBALCONFIG) +CUSTOM_CVAR(Int, snd_samplerate, 0, CVAR_ARCHIVE | CVAR_GLOBALCONFIG) +{ + if (self != 0 && self != 8000 && self != 11025 && self != 22050 && self != 32000 && self != 44100 && self != 48000) + { + self = 0; + return; + } +} +CVAR(Int, snd_buffersize, 0, CVAR_ARCHIVE | CVAR_GLOBALCONFIG) +CVAR(Int, snd_hrtf, -1, CVAR_ARCHIVE | CVAR_GLOBALCONFIG) -#if !defined(NO_OPENAL) +#if !defined(NO_OPENAL) #define DEF_BACKEND "openal" #else #define DEF_BACKEND "null" diff --git a/source/common/platform/posix/osx/iwadpicker_cocoa.mm b/source/common/platform/posix/osx/iwadpicker_cocoa.mm index bb7cdd0a6..e4740ea2a 100644 --- a/source/common/platform/posix/osx/iwadpicker_cocoa.mm +++ b/source/common/platform/posix/osx/iwadpicker_cocoa.mm @@ -389,6 +389,8 @@ static void RestartWithParameters(const WadStuff& wad, NSString* parameters) @try { NSString* executablePath = [NSString stringWithUTF8String:Args->GetArg(0)]; + NSString* escapedParameters = [parameters stringByReplacingOccurrencesOfString:@"\"" withString:@"\\\""]; + NSString* cvarArgument = [NSString stringWithFormat:@"+osx_additional_parameters \"%@\"", escapedParameters]; NSMutableArray* const arguments = [[NSMutableArray alloc] init]; [arguments addObject:@"-arch"]; @@ -398,7 +400,7 @@ static void RestartWithParameters(const WadStuff& wad, NSString* parameters) [arguments addObject:[NSString stringWithUTF8String:wad.Path]]; [arguments addObject:@"+defaultiwad"]; [arguments addObject:[NSString stringWithUTF8String:wad.Name]]; - [arguments addObject:[NSString stringWithFormat:@"+osx_additional_parameters \"%@\"", parameters]]; + [arguments addObject:cvarArgument]; for (int i = 1, count = Args->NumArgs(); i < count; ++i) { diff --git a/source/common/thirdparty/gain_analysis.cpp b/source/common/thirdparty/gain_analysis.cpp new file mode 100644 index 000000000..30ebccdef --- /dev/null +++ b/source/common/thirdparty/gain_analysis.cpp @@ -0,0 +1,486 @@ +/* + * ReplayGainAnalysis - analyzes input samples and give the recommended dB change + * Copyright (C) 2001-2009 David Robinson and Glen Sawyer + * Improvements and optimizations added by Frank Klemm, and by Marcel M�ller + * + * This library is free software; you can redistribute it and/or + * modify it under the terms of the GNU Lesser General Public + * License as published by the Free Software Foundation; either + * version 2.1 of the License, or (at your option) any later version. + * + * This library 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 + * Lesser General Public License for more details. + * + * You should have received a copy of the GNU Lesser General Public + * License along with this library; if not, write to the Free Software + * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA + * + * concept and filter values by David Robinson (David@Robinson.org) + * -- blame him if you think the idea is flawed + * original coding by Glen Sawyer (mp3gain@hotmail.com) + * -- blame him if you think this runs too slowly, or the coding is otherwise flawed + * + * lots of code improvements by Frank Klemm ( http://www.uni-jena.de/~pfk/mpp/ ) + * -- credit him for all the _good_ programming ;) + * + * + * For an explanation of the concepts and the basic algorithms involved, go to: + * http://www.replaygain.org/ + */ + +/* + * Here's the deal. Call + * + * InitGainAnalysis ( long samplefreq ); + * + * to initialize everything. Call + * + * AnalyzeSamples ( const Float_t* left_samples, + * const Float_t* right_samples, + * size_t num_samples, + * int num_channels ); + * + * as many times as you want, with as many or as few samples as you want. + * If mono, pass the sample buffer in through left_samples, leave + * right_samples NULL, and make sure num_channels = 1. + * + * GetTitleGain() + * + * will return the recommended dB level change for all samples analyzed + * SINCE THE LAST TIME you called GetTitleGain() OR InitGainAnalysis(). + * + * GetAlbumGain() + * + * will return the recommended dB level change for all samples analyzed + * since InitGainAnalysis() was called and finalized with GetTitleGain(). + * + * Pseudo-code to process an album: + * + * Float_t l_samples [4096]; + * Float_t r_samples [4096]; + * size_t num_samples; + * unsigned int num_songs; + * unsigned int i; + * + * InitGainAnalysis ( 44100 ); + * for ( i = 1; i <= num_songs; i++ ) { + * while ( ( num_samples = getSongSamples ( song[i], left_samples, right_samples ) ) > 0 ) + * AnalyzeSamples ( left_samples, right_samples, num_samples, 2 ); + * fprintf ("Recommended dB change for song %2d: %+6.2f dB\n", i, GetTitleGain() ); + * } + * fprintf ("Recommended dB change for whole album: %+6.2f dB\n", GetAlbumGain() ); + */ + +/* + * So here's the main source of potential code confusion: + * + * The filters applied to the incoming samples are IIR filters, + * meaning they rely on up to number of previous samples + * AND up to number of previous filtered samples. + * + * I set up the AnalyzeSamples routine to minimize memory usage and interface + * complexity. The speed isn't compromised too much (I don't think), but the + * internal complexity is higher than it should be for such a relatively + * simple routine. + * + * Optimization/clarity suggestions are welcome. + */ + +#include +#include +#include +#include + +#include "gain_analysis.h" + +#define RMS_PERCENTILE 0.95 // percentile which is louder than the proposed level + +#define PINK_REF 64.82 //298640883795 // calibration value + + +// for each filter: +// [0] 48 kHz, [1] 44.1 kHz, [2] 32 kHz, [3] 24 kHz, [4] 22050 Hz, [5] 16 kHz, [6] 12 kHz, [7] is 11025 Hz, [8] 8 kHz + +#ifdef WIN32 +#ifndef __GNUC__ +#pragma warning ( disable : 4305 ) +#pragma warning ( disable : 4244 ) +#endif +#endif + +static const Float_t ABYule[][2 * YULE_ORDER + 1] = { + {(const Float_t) 0.006471345933032, (const Float_t) -7.22103125152679, (const Float_t) -0.02567678242161, (const Float_t) 24.7034187975904, (const Float_t) 0.049805860704367, (const Float_t) -52.6825833623896, (const Float_t) -0.05823001743528, (const Float_t) 77.4825736677539, (const Float_t) 0.040611847441914, (const Float_t) -82.0074753444205, (const Float_t) -0.010912036887501, (const Float_t) 63.1566097101925, (const Float_t) -0.00901635868667, (const Float_t) -34.889569769245, (const Float_t) 0.012448886238123, (const Float_t) 13.2126852760198, (const Float_t) -0.007206683749426, (const Float_t) -3.09445623301669, (const Float_t) 0.002167156433951, (const Float_t) 0.340344741393305, (const Float_t) -0.000261819276949}, + {(const Float_t) 0.015415414474287, (const Float_t) -7.19001570087017, (const Float_t) -0.07691359399407, (const Float_t) 24.4109412087159, (const Float_t) 0.196677418516518, (const Float_t) -51.6306373580801, (const Float_t) -0.338855114128061, (const Float_t) 75.3978476863163, (const Float_t) 0.430094579594561, (const Float_t) -79.4164552507386, (const Float_t) -0.415015413747894, (const Float_t) 61.0373661948115, (const Float_t) 0.304942508151101, (const Float_t) -33.7446462547014, (const Float_t) -0.166191795926663, (const Float_t) 12.8168791146274, (const Float_t) 0.063198189938739, (const Float_t) -3.01332198541437, (const Float_t) -0.015003978694525, (const Float_t) 0.223619893831468, (const Float_t) 0.001748085184539}, + {(const Float_t) 0.021776466467053, (const Float_t) -5.74819833657784, (const Float_t) -0.062376961003801, (const Float_t) 16.246507961894, (const Float_t) 0.107731165328514, (const Float_t) -29.9691822642542, (const Float_t) -0.150994515142316, (const Float_t) 40.027597579378, (const Float_t) 0.170334807313632, (const Float_t) -40.3209196052655, (const Float_t) -0.157984942890531, (const Float_t) 30.8542077487718, (const Float_t) 0.121639833268721, (const Float_t) -17.5965138737281, (const Float_t) -0.074094040816409, (const Float_t) 7.10690214103873, (const Float_t) 0.031282852041061, (const Float_t) -1.82175564515191, (const Float_t) -0.00755421235941, (const Float_t) 0.223619893831468, (const Float_t) 0.00117925454213}, + {(const Float_t) 0.03857599435200, (const Float_t) -3.84664617118067, (const Float_t) -0.02160367184185, (const Float_t) 7.81501653005538, (const Float_t) -0.00123395316851, (const Float_t) -11.34170355132042, (const Float_t) -0.00009291677959, (const Float_t) 13.05504219327545, (const Float_t) -0.01655260341619, (const Float_t) -12.28759895145294, (const Float_t) 0.02161526843274, (const Float_t) 9.48293806319790, (const Float_t) -0.02074045215285, (const Float_t) -5.87257861775999, (const Float_t) 0.00594298065125, (const Float_t) 2.75465861874613, (const Float_t) 0.00306428023191, (const Float_t) -0.86984376593551, (const Float_t) 0.00012025322027, (const Float_t) 0.13919314567432, (const Float_t) 0.00288463683916}, + {(const Float_t) 0.05418656406430, (const Float_t) -3.47845948550071, (const Float_t) -0.02911007808948, (const Float_t) 6.36317777566148, (const Float_t) -0.00848709379851, (const Float_t) -8.54751527471874, (const Float_t) -0.00851165645469, (const Float_t) 9.47693607801280, (const Float_t) -0.00834990904936, (const Float_t) -8.81498681370155, (const Float_t) 0.02245293253339, (const Float_t) 6.85401540936998, (const Float_t) -0.02596338512915, (const Float_t) -4.39470996079559, (const Float_t) 0.01624864962975, (const Float_t) 2.19611684890774, (const Float_t) -0.00240879051584, (const Float_t) -0.75104302451432, (const Float_t) 0.00674613682247, (const Float_t) 0.13149317958808, (const Float_t) -0.00187763777362}, + {(const Float_t) 0.15457299681924, (const Float_t) -2.37898834973084, (const Float_t) -0.09331049056315, (const Float_t) 2.84868151156327, (const Float_t) -0.06247880153653, (const Float_t) -2.64577170229825, (const Float_t) 0.02163541888798, (const Float_t) 2.23697657451713, (const Float_t) -0.05588393329856, (const Float_t) -1.67148153367602, (const Float_t) 0.04781476674921, (const Float_t) 1.00595954808547, (const Float_t) 0.00222312597743, (const Float_t) -0.45953458054983, (const Float_t) 0.03174092540049, (const Float_t) 0.16378164858596, (const Float_t) -0.01390589421898, (const Float_t) -0.05032077717131, (const Float_t) 0.00651420667831, (const Float_t) 0.02347897407020, (const Float_t) -0.00881362733839}, + {(const Float_t) 0.30296907319327, (const Float_t) -1.61273165137247, (const Float_t) -0.22613988682123, (const Float_t) 1.07977492259970, (const Float_t) -0.08587323730772, (const Float_t) -0.25656257754070, (const Float_t) 0.03282930172664, (const Float_t) -0.16276719120440, (const Float_t) -0.00915702933434, (const Float_t) -0.22638893773906, (const Float_t) -0.02364141202522, (const Float_t) 0.39120800788284, (const Float_t) -0.00584456039913, (const Float_t) -0.22138138954925, (const Float_t) 0.06276101321749, (const Float_t) 0.04500235387352, (const Float_t) -0.00000828086748, (const Float_t) 0.02005851806501, (const Float_t) 0.00205861885564, (const Float_t) 0.00302439095741, (const Float_t) -0.02950134983287}, + {(const Float_t) 0.33642304856132, (const Float_t) -1.49858979367799, (const Float_t) -0.25572241425570, (const Float_t) 0.87350271418188, (const Float_t) -0.11828570177555, (const Float_t) 0.12205022308084, (const Float_t) 0.11921148675203, (const Float_t) -0.80774944671438, (const Float_t) -0.07834489609479, (const Float_t) 0.47854794562326, (const Float_t) -0.00469977914380, (const Float_t) -0.12453458140019, (const Float_t) -0.00589500224440, (const Float_t) -0.04067510197014, (const Float_t) 0.05724228140351, (const Float_t) 0.08333755284107, (const Float_t) 0.00832043980773, (const Float_t) -0.04237348025746, (const Float_t) -0.01635381384540, (const Float_t) 0.02977207319925, (const Float_t) -0.01760176568150}, + {(const Float_t) 0.44915256608450, (const Float_t) -0.62820619233671, (const Float_t) -0.14351757464547, (const Float_t) 0.29661783706366, (const Float_t) -0.22784394429749, (const Float_t) -0.37256372942400, (const Float_t) -0.01419140100551, (const Float_t) 0.00213767857124, (const Float_t) 0.04078262797139, (const Float_t) -0.42029820170918, (const Float_t) -0.12398163381748, (const Float_t) 0.22199650564824, (const Float_t) 0.04097565135648, (const Float_t) 0.00613424350682, (const Float_t) 0.10478503600251, (const Float_t) 0.06747620744683, (const Float_t) -0.01863887810927, (const Float_t) 0.05784820375801, (const Float_t) -0.03193428438915, (const Float_t) 0.03222754072173, (const Float_t) 0.00541907748707}, + {(const Float_t) 0.56619470757641, (const Float_t) -1.04800335126349, (const Float_t) -0.75464456939302, (const Float_t) 0.29156311971249, (const Float_t) 0.16242137742230, (const Float_t) -0.26806001042947, (const Float_t) 0.16744243493672, (const Float_t) 0.00819999645858, (const Float_t) -0.18901604199609, (const Float_t) 0.45054734505008, (const Float_t) 0.30931782841830, (const Float_t) -0.33032403314006, (const Float_t) -0.27562961986224, (const Float_t) 0.06739368333110, (const Float_t) 0.00647310677246, (const Float_t) -0.04784254229033, (const Float_t) 0.08647503780351, (const Float_t) 0.01639907836189, (const Float_t) -0.03788984554840, (const Float_t) 0.01807364323573, (const Float_t) -0.00588215443421}, + {(const Float_t) 0.58100494960553, (const Float_t) -0.51035327095184, (const Float_t) -0.53174909058578, (const Float_t) -0.31863563325245, (const Float_t) -0.14289799034253, (const Float_t) -0.20256413484477, (const Float_t) 0.17520704835522, (const Float_t) 0.14728154134330, (const Float_t) 0.02377945217615, (const Float_t) 0.38952639978999, (const Float_t) 0.15558449135573, (const Float_t) -0.23313271880868, (const Float_t) -0.25344790059353, (const Float_t) -0.05246019024463, (const Float_t) 0.01628462406333, (const Float_t) -0.02505961724053, (const Float_t) 0.06920467763959, (const Float_t) 0.02442357316099, (const Float_t) -0.03721611395801, (const Float_t) 0.01818801111503, (const Float_t) -0.00749618797172}, + {(const Float_t) 0.53648789255105, (const Float_t) -0.25049871956020, (const Float_t) -0.42163034350696, (const Float_t) -0.43193942311114, (const Float_t) -0.00275953611929, (const Float_t) -0.03424681017675, (const Float_t) 0.04267842219415, (const Float_t) -0.04678328784242, (const Float_t) -0.10214864179676, (const Float_t) 0.26408300200955, (const Float_t) 0.14590772289388, (const Float_t) 0.15113130533216, (const Float_t) -0.02459864859345, (const Float_t) -0.17556493366449, (const Float_t) -0.11202315195388, (const Float_t) -0.18823009262115, (const Float_t) -0.04060034127000, (const Float_t) 0.05477720428674, (const Float_t) 0.04788665548180, (const Float_t) 0.04704409688120, (const Float_t) -0.02217936801134}, + + {(const Float_t) 0.38524531015142, (const Float_t) -1.29708918404534, (const Float_t) -0.27682212062067, (const Float_t) 0.90399339674203, (const Float_t)-0.09980181488805, (const Float_t) -0.29613799017877, (const Float_t) 0.09951486755646, (const Float_t)-0.42326645916207, (const Float_t) -0.08934020156622, (const Float_t) 0.37934887402200, (const Float_t) -0.00322369330199, (const Float_t) -0.37919795944938, (const Float_t) -0.00110329090689, (const Float_t) 0.23410283284785, (const Float_t) 0.03784509844682, (const Float_t) -0.03892971758879, (const Float_t) 0.01683906213303, (const Float_t) 0.00403009552351, (const Float_t) -0.01147039862572, (const Float_t) 0.03640166626278, (const Float_t) -0.01941767987192 }, + {(const Float_t)0.08717879977844, (const Float_t)-2.62816311472146, (const Float_t)-0.01000374016172, (const Float_t)3.53734535817992, (const Float_t)-0.06265852122368, (const Float_t)-3.81003448678921, (const Float_t)-0.01119328800950, (const Float_t)3.91291636730132, (const Float_t)-0.00114279372960, (const Float_t)-3.53518605896288, (const Float_t)0.02081333954769, (const Float_t)2.71356866157873, (const Float_t)-0.01603261863207, (const Float_t)-1.86723311846592, (const Float_t)0.01936763028546, (const Float_t)1.12075382367659, (const Float_t)0.00760044736442, (const Float_t)-0.48574086886890, (const Float_t)-0.00303979112271, (const Float_t)0.11330544663849, (const Float_t)-0.00075088605788 }, + +}; + + +static const Float_t ABButter[][2 * BUTTER_ORDER + 1] = { + {(const Float_t) 0.99308203517541, (const Float_t) -1.98611621154089, (const Float_t) -1.98616407035082, (const Float_t) 0.986211929160751, (const Float_t) 0.99308203517541}, + {(const Float_t) 0.992472550461293, (const Float_t) -1.98488843762334, (const Float_t) -1.98494510092258, (const Float_t) 0.979389350028798, (const Float_t) 0.992472550461293}, + {(const Float_t) 0.989641019334721, (const Float_t) -1.97917472731008, (const Float_t) -1.97928203866944, (const Float_t) 0.979389350028798, (const Float_t) 0.989641019334721}, + {(const Float_t) 0.98621192462708, (const Float_t) -1.97223372919527, (const Float_t) -1.97242384925416, (const Float_t) 0.97261396931306, (const Float_t) 0.98621192462708}, + {(const Float_t) 0.98500175787242, (const Float_t) -1.96977855582618, (const Float_t) -1.97000351574484, (const Float_t) 0.97022847566350, (const Float_t) 0.98500175787242}, + {(const Float_t) 0.97938932735214, (const Float_t) -1.95835380975398, (const Float_t) -1.95877865470428, (const Float_t) 0.95920349965459, (const Float_t) 0.97938932735214}, + {(const Float_t) 0.97531843204928, (const Float_t) -1.95002759149878, (const Float_t) -1.95063686409857, (const Float_t) 0.95124613669835, (const Float_t) 0.97531843204928}, + {(const Float_t) 0.97316523498161, (const Float_t) -1.94561023566527, (const Float_t) -1.94633046996323, (const Float_t) 0.94705070426118, (const Float_t) 0.97316523498161}, + {(const Float_t) 0.96454515552826, (const Float_t) -1.92783286977036, (const Float_t) -1.92909031105652, (const Float_t) 0.93034775234268, (const Float_t) 0.96454515552826}, + {(const Float_t) 0.96009142950541, (const Float_t) -1.91858953033784, (const Float_t) -1.92018285901082, (const Float_t) 0.92177618768381, (const Float_t) 0.96009142950541}, + {(const Float_t) 0.95856916599601, (const Float_t) -1.91542108074780, (const Float_t) -1.91713833199203, (const Float_t) 0.91885558323625, (const Float_t) 0.95856916599601}, + {(const Float_t) 0.94597685600279, (const Float_t) -1.88903307939452, (const Float_t) -1.89195371200558, (const Float_t) 0.89487434461664, (const Float_t) 0.94597685600279}, + + {(const Float_t)0.96535326815829, (const Float_t)-1.92950577983524, (const Float_t)-1.93070653631658, (const Float_t)0.93190729279793, (const Float_t)0.96535326815829 }, + {(const Float_t)0.98252400815195, (const Float_t)-1.96474258269041, (const Float_t)-1.96504801630391, (const Float_t)0.96535344991740, (const Float_t)0.98252400815195 }, + +}; + +#ifdef WIN32 +#ifndef __GNUC__ +#pragma warning ( default : 4305 ) +#endif +#endif + +// When calling these filter procedures, make sure that ip[-order] and op[-order] point to real data! + +// If your compiler complains that "'operation on 'output' may be undefined", you can +// either ignore the warnings or uncomment the three "y" lines (and comment out the indicated line) + +void +GainAnalyzer::filterYule(const Float_t *input, Float_t *output, size_t nSamples, const Float_t *kernel) +{ + + while (nSamples--) { + *output = 1e-10f /* 1e-10 is a hack to avoid slowdown because of denormals */ + + input[0] * kernel[0] + - output[-1] * kernel[1] + + input[-1] * kernel[2] + - output[-2] * kernel[3] + + input[-2] * kernel[4] + - output[-3] * kernel[5] + + input[-3] * kernel[6] + - output[-4] * kernel[7] + + input[-4] * kernel[8] + - output[-5] * kernel[9] + + input[-5] * kernel[10] + - output[-6] * kernel[11] + + input[-6] * kernel[12] + - output[-7] * kernel[13] + + input[-7] * kernel[14] + - output[-8] * kernel[15] + + input[-8] * kernel[16] + - output[-9] * kernel[17] + + input[-9] * kernel[18] + - output[-10] * kernel[19] + + input[-10] * kernel[20]; + ++output; + ++input; + } +} + +void +GainAnalyzer::filterButter(const Float_t *input, Float_t *output, size_t nSamples, const Float_t *kernel) { + + while (nSamples--) { + *output = + input[0] * kernel[0] + - output[-1] * kernel[1] + + input[-1] * kernel[2] + - output[-2] * kernel[3] + + input[-2] * kernel[4]; + ++output; + ++input; + } +} + + +// returns a INIT_GAIN_ANALYSIS_OK if successful, INIT_GAIN_ANALYSIS_ERROR if not + +int +GainAnalyzer::ResetSampleFrequency(int samplefreq) { + int i; + + // zero out initial values + for (i = 0; i < MAX_ORDER; i++) + linprebuf[i] = lstepbuf[i] = loutbuf[i] = rinprebuf[i] = rstepbuf[i] = routbuf[i] = (Float_t) 0.; + + switch ((int) (samplefreq)) { + case 96000: + freqindex = 0; + break; + case 88200: + freqindex = 1; + break; + case 64000: + freqindex = 2; + break; + case 49716: // I could not find a table for this but we need to be able to handle this frequency for OPL, even if this means not getting the proper level. + case 48000: + freqindex = 3; + break; + case 44100: + freqindex = 4; + break; + case 32000: + freqindex = 5; + break; + case 24000: + freqindex = 6; + break; + case 22050: + freqindex = 7; + break; + case 16000: + freqindex = 8; + break; + case 12000: + freqindex = 9; + break; + case 11025: + freqindex = 10; + break; + case 8000: + freqindex = 11; + break; + + // These two were added for XA support. + case 18900: + freqindex = 12; + break; + case 37800: + freqindex = 13; + break; + default: + return INIT_GAIN_ANALYSIS_ERROR; + } + + sampleWindow = (int) ceil(samplefreq * RMS_WINDOW_TIME); + + lsum = 0.; + rsum = 0.; + totsamp = 0; + + memset(A, 0, sizeof(A)); + + return INIT_GAIN_ANALYSIS_OK; +} + +int +GainAnalyzer::InitGainAnalysis(int samplefreq) { + *this = {}; + if (ResetSampleFrequency(samplefreq) != INIT_GAIN_ANALYSIS_OK) { + return INIT_GAIN_ANALYSIS_ERROR; + } + + linpre = linprebuf + MAX_ORDER; + rinpre = rinprebuf + MAX_ORDER; + lstep = lstepbuf + MAX_ORDER; + rstep = rstepbuf + MAX_ORDER; + lout = loutbuf + MAX_ORDER; + rout = routbuf + MAX_ORDER; + + memset(B, 0, sizeof(B)); + + return INIT_GAIN_ANALYSIS_OK; +} + +// returns GAIN_ANALYSIS_OK if successful, GAIN_ANALYSIS_ERROR if not + +static __inline double fsqr(const double d) { + return d * d; +} + +int +GainAnalyzer::AnalyzeSamples(const Float_t *left_samples, const Float_t *right_samples, size_t num_samples, int num_channels) { + const Float_t *curleft; + const Float_t *curright; + int64_t batchsamples; + int64_t cursamples; + int64_t cursamplepos; + int i; + + if (num_samples == 0) + return GAIN_ANALYSIS_OK; + + cursamplepos = 0; + batchsamples = (int64_t) num_samples; + + switch (num_channels) { + case 1: + right_samples = left_samples; + case 2: + break; + default: + return GAIN_ANALYSIS_ERROR; + } + + if (num_samples < MAX_ORDER) { + memcpy(linprebuf + MAX_ORDER, left_samples, num_samples * sizeof(Float_t)); + memcpy(rinprebuf + MAX_ORDER, right_samples, num_samples * sizeof(Float_t)); + } else { + memcpy(linprebuf + MAX_ORDER, left_samples, MAX_ORDER * sizeof(Float_t)); + memcpy(rinprebuf + MAX_ORDER, right_samples, MAX_ORDER * sizeof(Float_t)); + } + + while (batchsamples > 0) { + cursamples = batchsamples > sampleWindow - totsamp ? sampleWindow - totsamp : batchsamples; + if (cursamplepos < MAX_ORDER) { + curleft = linpre + cursamplepos; + curright = rinpre + cursamplepos; + if (cursamples > MAX_ORDER - cursamplepos) + cursamples = MAX_ORDER - cursamplepos; + } else { + curleft = left_samples + cursamplepos; + curright = right_samples + cursamplepos; + } + + filterYule(curleft, lstep + totsamp, cursamples, ABYule[freqindex]); + filterYule(curright, rstep + totsamp, cursamples, ABYule[freqindex]); + + filterButter(lstep + totsamp, lout + totsamp, cursamples, ABButter[freqindex]); + filterButter(rstep + totsamp, rout + totsamp, cursamples, ABButter[freqindex]); + + curleft = lout + totsamp; // Get the squared values + curright = rout + totsamp; + + i = cursamples % 16; + while (i--) { + lsum += fsqr(*curleft++); + rsum += fsqr(*curright++); + } + i = cursamples / 16; + while (i--) { + lsum += fsqr(curleft[0]) + + fsqr(curleft[1]) + + fsqr(curleft[2]) + + fsqr(curleft[3]) + + fsqr(curleft[4]) + + fsqr(curleft[5]) + + fsqr(curleft[6]) + + fsqr(curleft[7]) + + fsqr(curleft[8]) + + fsqr(curleft[9]) + + fsqr(curleft[10]) + + fsqr(curleft[11]) + + fsqr(curleft[12]) + + fsqr(curleft[13]) + + fsqr(curleft[14]) + + fsqr(curleft[15]); + curleft += 16; + rsum += fsqr(curright[0]) + + fsqr(curright[1]) + + fsqr(curright[2]) + + fsqr(curright[3]) + + fsqr(curright[4]) + + fsqr(curright[5]) + + fsqr(curright[6]) + + fsqr(curright[7]) + + fsqr(curright[8]) + + fsqr(curright[9]) + + fsqr(curright[10]) + + fsqr(curright[11]) + + fsqr(curright[12]) + + fsqr(curright[13]) + + fsqr(curright[14]) + + fsqr(curright[15]); + curright += 16; + } + + batchsamples -= cursamples; + cursamplepos += cursamples; + totsamp += cursamples; + if (totsamp == sampleWindow) { // Get the Root Mean Square (RMS) for this set of samples + double val = STEPS_per_dB * 10. * log10((lsum + rsum) / totsamp * 0.5 + 1.e-37); + int ival = (int) val; + if (ival < 0) ival = 0; + if (ival >= (int) (sizeof(A) / sizeof(*A))) ival = sizeof(A) / sizeof(*A) - 1; + A[ival]++; + lsum = rsum = 0.; + memmove(loutbuf, loutbuf + totsamp, MAX_ORDER * sizeof(Float_t)); + memmove(routbuf, routbuf + totsamp, MAX_ORDER * sizeof(Float_t)); + memmove(lstepbuf, lstepbuf + totsamp, MAX_ORDER * sizeof(Float_t)); + memmove(rstepbuf, rstepbuf + totsamp, MAX_ORDER * sizeof(Float_t)); + totsamp = 0; + } + if (totsamp > + sampleWindow) // somehow I really screwed up: Error in programming! Contact author about totsamp > sampleWindow + return GAIN_ANALYSIS_ERROR; + } + if (num_samples < MAX_ORDER) { + memmove(linprebuf, linprebuf + num_samples, (MAX_ORDER - num_samples) * sizeof(Float_t)); + memmove(rinprebuf, rinprebuf + num_samples, (MAX_ORDER - num_samples) * sizeof(Float_t)); + memcpy(linprebuf + MAX_ORDER - num_samples, left_samples, num_samples * sizeof(Float_t)); + memcpy(rinprebuf + MAX_ORDER - num_samples, right_samples, num_samples * sizeof(Float_t)); + } else { + memcpy(linprebuf, left_samples + num_samples - MAX_ORDER, MAX_ORDER * sizeof(Float_t)); + memcpy(rinprebuf, right_samples + num_samples - MAX_ORDER, MAX_ORDER * sizeof(Float_t)); + } + + return GAIN_ANALYSIS_OK; +} + + +Float_t +GainAnalyzer::analyzeResult(const unsigned int *Array, size_t len) { + unsigned int elems; + signed int upper; + size_t i; + + elems = 0; + for (i = 0; i < len; i++) + elems += Array[i]; + if (elems == 0) + return GAIN_NOT_ENOUGH_SAMPLES; + + upper = (signed int) ceil(elems * (1. - RMS_PERCENTILE)); + for (i = len; i-- > 0;) { + if ((upper -= Array[i]) <= 0) + break; + } + + return (Float_t) ((Float_t) PINK_REF - (Float_t) i / (Float_t) STEPS_per_dB); +} + + +Float_t +GainAnalyzer::GetTitleGain(void) { + Float_t retval; + int i; + + retval = analyzeResult(A, sizeof(A) / sizeof(*A)); + + for (i = 0; i < (int) (sizeof(A) / sizeof(*A)); i++) { + B[i] += A[i]; + A[i] = 0; + } + + for (i = 0; i < MAX_ORDER; i++) + linprebuf[i] = lstepbuf[i] = loutbuf[i] = rinprebuf[i] = rstepbuf[i] = routbuf[i] = 0.f; + + totsamp = 0; + lsum = rsum = 0.; + return retval; +} + + +Float_t +GainAnalyzer::GetAlbumGain(void) { + return analyzeResult(B, sizeof(B) / sizeof(*B)); +} + + +/* end of gain_analysis.c */ diff --git a/source/common/thirdparty/gain_analysis.h b/source/common/thirdparty/gain_analysis.h new file mode 100644 index 000000000..076da30d4 --- /dev/null +++ b/source/common/thirdparty/gain_analysis.h @@ -0,0 +1,92 @@ +/* + * ReplayGainAnalysis - analyzes input samples and give the recommended dB change + * Copyright (C) 2001-2009 David Robinson and Glen Sawyer + * + * This library is free software; you can redistribute it and/or + * modify it under the terms of the GNU Lesser General Public + * License as published by the Free Software Foundation; either + * version 2.1 of the License, or (at your option) any later version. + * + * This library 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 + * Lesser General Public License for more details. + * + * You should have received a copy of the GNU Lesser General Public + * License along with this library; if not, write to the Free Software + * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA + * + * concept and filter values by David Robinson (David@Robinson.org) + * -- blame him if you think the idea is flawed + * coding by Glen Sawyer (mp3gain@hotmail.com) 735 W 255 N, Orem, UT 84057-4505 USA + * -- blame him if you think this runs too slowly, or the coding is otherwise flawed + * + * For an explanation of the concepts and the basic algorithms involved, go to: + * http://www.replaygain.org/ + */ + +#ifndef GAIN_ANALYSIS_H +#define GAIN_ANALYSIS_H + +#include +#include + +#define GAIN_NOT_ENOUGH_SAMPLES (-24601) +#define GAIN_ANALYSIS_ERROR 0 +#define GAIN_ANALYSIS_OK 1 + +#define INIT_GAIN_ANALYSIS_ERROR 0 +#define INIT_GAIN_ANALYSIS_OK 1 + +#define STEPS_per_dB 100. // Table entries per dB +#define MAX_dB 120. // Table entries for 0...MAX_dB (normal max. values are 70...80 dB) +#define MAX_SAMP_FREQ 96000. // maximum allowed sample frequency [Hz] +#define RMS_WINDOW_TIME 0.050 // Time slice size [s] + +#define YULE_ORDER 10 +#define BUTTER_ORDER 2 +#define MAX_ORDER (BUTTER_ORDER > YULE_ORDER ? BUTTER_ORDER : YULE_ORDER) +#define MAX_SAMPLES_PER_WINDOW (size_t) (MAX_SAMP_FREQ * RMS_WINDOW_TIME + 1) // max. Samples per Time slice + +typedef float Float_t; // Type used for filtering + +struct GainAnalyzer +{ + int InitGainAnalysis(int samplefreq); + + int AnalyzeSamples(const Float_t *left_samples, const Float_t *right_samples, size_t num_samples, int num_channels); + + int ResetSampleFrequency(int samplefreq); + + Float_t GetTitleGain(void); + + Float_t GetAlbumGain(void); + +private: + Float_t linprebuf[MAX_ORDER * 2]; + Float_t *linpre; // left input samples, with pre-buffer + Float_t lstepbuf[MAX_SAMPLES_PER_WINDOW + MAX_ORDER]; + Float_t *lstep; // left "first step" (i.e. post first filter) samples + Float_t loutbuf[MAX_SAMPLES_PER_WINDOW + MAX_ORDER]; + Float_t *lout; // left "out" (i.e. post second filter) samples + Float_t rinprebuf[MAX_ORDER * 2]; + Float_t *rinpre; // right input samples ... + Float_t rstepbuf[MAX_SAMPLES_PER_WINDOW + MAX_ORDER]; + Float_t *rstep; + Float_t routbuf[MAX_SAMPLES_PER_WINDOW + MAX_ORDER]; + Float_t *rout; + long sampleWindow; // number of samples required to reach number of milliseconds required for RMS window + long totsamp; + double lsum; + double rsum; + int freqindex; + unsigned int A[(size_t) (STEPS_per_dB * MAX_dB)]; + unsigned int B[(size_t) (STEPS_per_dB * MAX_dB)]; + + void filterYule(const Float_t* input, Float_t* output, size_t nSamples, const Float_t* kernel); + void filterButter(const Float_t* input, Float_t* output, size_t nSamples, const Float_t* kernel); + Float_t analyzeResult(const unsigned int* Array, size_t len); + +}; + +#endif /* GAIN_ANALYSIS_H */