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/*************************************************************************** |
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* * |
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* libsf2 - C++ cross-platform SF2 format file access library * |
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* * |
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* Copyright (C) 2009 Grigor Iliev <grigor@grigoriliev.com> * |
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* Copyright (C) 2009 Christian Schoenebeck * |
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* Copyright (C) 2009 Andreas Persson * |
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* * |
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* This library is free software; you can redistribute it and/or modify * |
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* it under the terms of the GNU General Public License as published by * |
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* the Free Software Foundation; either version 2 of the License, or * |
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* (at your option) any later version. * |
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* * |
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* This library 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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* * |
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* You should have received a copy of the GNU General Public License * |
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* along with this library; if not, write to the Free Software * |
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, * |
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* MA 02111-1307 USA * |
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***************************************************************************/ |
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|
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#include <vector> |
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|
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#include "RIFF.h" |
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|
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#include "SF.h" |
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|
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#include "helper.h" |
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#include <math.h> |
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|
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#define _1200TH_ROOT_OF_2 1.000577789506555 |
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#define _200TH_ROOT_OF_10 1.011579454259899 |
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|
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namespace sf2 { |
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double ToSeconds(int Timecents) { |
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if (Timecents == 0) return 1.0; |
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if (Timecents == -32768) return 0.0; |
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return pow(_1200TH_ROOT_OF_2, Timecents); |
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} |
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|
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double ToPermilles(int Centibels) { |
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if (Centibels == 0) return 1000.0; |
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if (Centibels < 0) return 0.0; |
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return pow(_200TH_ROOT_OF_10, Centibels); |
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} |
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|
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RIFF::Chunk* GetMandatoryChunk(RIFF::List* list, uint32_t chunkId) { |
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RIFF::Chunk* ck = list->GetSubChunk(chunkId); |
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if(ck == NULL) throw Exception("Mandatory chunk in RIFF list chunk not found: " + ToString(chunkId)); |
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return ck; |
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} |
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|
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void LoadString(RIFF::Chunk* ck, std::string& s, int strLength) { |
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if(ck == NULL) return; |
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char* buf = new char[strLength]; |
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int len = 0; |
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for(int i = 0; i < strLength; i++) { |
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buf[i] = ck->ReadInt8(); |
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if(buf[i] == 0 && !len) len = i; |
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} |
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if(!len) len = strLength; |
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s.assign(buf, len); |
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delete [] buf; |
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} |
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|
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/** |
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* Throws an error if the chunk is NULL or |
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* the chunk data size is less than size (in bytes). |
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*/ |
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void VerifySize(RIFF::Chunk* ck, int size) { |
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if (ck == NULL) throw Exception("NULL chunk"); |
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if (ck->GetSize() < size) { |
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throw Exception("Invalid chunk size. Chunk ID: " + ToString(ck->GetChunkID())); |
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} |
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} |
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|
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Modulator::Modulator(SFModulator mod) { |
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Type = mod >> 10; // The last 6 bits |
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Polarity = mod & (1 << 9); |
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Direction = mod & (1 << 8); |
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MidiPalete = mod & (1 << 7); // two paletes - general or MIDI |
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Index = mod & 0x7f; /* index field */; |
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|
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} |
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|
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ModulatorItem::ModulatorItem(ModList& mod) : |
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ModSrcOper(Modulator(mod.ModSrcOper)), |
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ModAmtSrcOper(Modulator(mod.ModAmtSrcOper)) |
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{ |
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|
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} |
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|
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Version::Version(RIFF::Chunk* ck) { |
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if(ck != NULL) VerifySize(ck, 4); |
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Major = ck ? ck->ReadUint16() : 0; |
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Minor = ck ? ck->ReadUint16() : 0; |
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} |
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|
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// *************** Info *************** |
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// * |
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|
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/** @brief Constructor. |
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* |
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* Initializes the info strings with values provided by an INFO list chunk. |
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* |
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* @param list - pointer to a list chunk which contains an INFO list chunk |
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*/ |
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Info::Info(RIFF::List* list) { |
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if (list) { |
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RIFF::List* lstINFO = list->GetSubList(LIST_TYPE_INFO); |
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if (lstINFO) { |
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pVer = new Version(GetMandatoryChunk(lstINFO, CHUNK_ID_IFIL)); |
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LoadString(CHUNK_ID_ISNG, lstINFO, SoundEngine); |
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LoadString(CHUNK_ID_INAM, lstINFO, BankName); |
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LoadString(CHUNK_ID_IROM, lstINFO, RomName); |
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pRomVer = new Version(lstINFO->GetSubChunk(CHUNK_ID_IVER)); |
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LoadString(CHUNK_ID_ICRD, lstINFO, CreationDate); |
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LoadString(CHUNK_ID_IENG, lstINFO, Engineers); |
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LoadString(CHUNK_ID_IPRD, lstINFO, Product); |
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LoadString(CHUNK_ID_ICOP, lstINFO, Copyright); |
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LoadString(CHUNK_ID_ICMT, lstINFO, Comments); |
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LoadString(CHUNK_ID_ISFT, lstINFO, Software); |
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|
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} |
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} |
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} |
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|
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Info::~Info() { |
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delete pVer; |
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delete pRomVer; |
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} |
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|
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/** @brief Load given INFO field. |
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* |
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* Load INFO field from INFO chunk with chunk ID \a ChunkID from INFO |
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* list chunk \a lstINFO and save value to \a s. |
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*/ |
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void Info::LoadString(uint32_t ChunkID, RIFF::List* lstINFO, String& s) { |
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RIFF::Chunk* ck = lstINFO->GetSubChunk(ChunkID); |
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::LoadString(ck, s); // function from helper.h |
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} |
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|
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Sample::Sample(RIFF::Chunk* ck, RIFF::Chunk* pCkSmpl, RIFF::Chunk* pCkSm24) { |
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this->pCkSmpl = pCkSmpl; |
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this->pCkSm24 = pCkSm24; |
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|
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LoadString(ck, Name, 20); |
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Start = ck->ReadInt32(); |
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End = ck->ReadInt32(); |
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StartLoop = ck->ReadInt32(); |
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EndLoop = ck->ReadInt32(); |
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SampleRate = ck->ReadInt32(); |
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OriginalPitch = ck->ReadInt8(); |
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PitchCorrection = ck->ReadInt8(); |
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SampleLink = ck->ReadInt16(); |
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SampleType = ck->ReadInt16(); |
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|
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if (Start > End || !pCkSmpl || pCkSmpl->GetSize() <= End) { |
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throw Exception("Broken SF2 file (invalid sample info)"); |
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} |
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|
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ChannelCount = 1; |
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switch(SampleType) { |
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case 0 : // terminal sample |
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case sf2::Sample::MONO_SAMPLE : |
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case sf2::Sample::ROM_MONO_SAMPLE : break; |
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case sf2::Sample::RIGHT_SAMPLE : |
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case sf2::Sample::LEFT_SAMPLE : |
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case sf2::Sample::ROM_RIGHT_SAMPLE : |
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case sf2::Sample::ROM_LEFT_SAMPLE : ChannelCount = 2; break; |
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case sf2::Sample::LINKED_SAMPLE : |
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case sf2::Sample::ROM_LINKED_SAMPLE : std::cerr << "Linked samples not implemented yet"; break; |
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default: throw Exception("Broken SF2 file (invalid sample type)"); |
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} |
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|
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RAMCache.Size = 0; |
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RAMCache.pStart = NULL; |
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RAMCache.NullExtensionSize = 0; |
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} |
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|
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int Sample::GetChannelCount() { |
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return ChannelCount; |
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} |
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|
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long Sample::GetTotalFrameCount() { |
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return (End - Start); |
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} |
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|
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/** |
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* @returns The frame size in bytes |
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*/ |
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int Sample::GetFrameSize() { |
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return ChannelCount * ((pCkSm24 != NULL) ? 3 : 2); |
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} |
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|
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bool Sample::HasLoops() { |
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return StartLoop != 0 && EndLoop != 0; |
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} |
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|
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/** |
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* Reads \a SampleCount number of sample points from the position stored |
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* in \a pPlaybackState into the buffer pointed by \a pBuffer and moves |
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* the position within the sample respectively, this method honors the |
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* looping informations of the sample (if any). Use this |
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* method if you don't want to load the sample into RAM, thus for disk |
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* streaming. All this methods needs to know to proceed with streaming |
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* for the next time you call this method is stored in \a pPlaybackState. |
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* You have to allocate and initialize the playback_state_t structure by |
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* yourself before you use it to stream a sample: |
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* @code |
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* PlaybackState playbackstate; |
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* playbackstate.position = 0; |
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* playbackstate.reverse = false; |
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* playbackstate.loop_cycles_left = pSample->LoopPlayCount; |
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* @endcode |
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* You don't have to take care of things like if there is actually a loop |
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* defined or if the current read position is located within a loop area. |
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* The method already handles such cases by itself. |
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* |
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* @param pBuffer destination buffer |
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* @param FrameCount number of sample points to read |
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* @param pPlaybackState will be used to store and reload the playback |
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* state for the next ReadAndLoop() call |
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* @returns number of successfully read sample points |
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*/ |
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unsigned long Sample::ReadAndLoop ( |
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void* pBuffer, |
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unsigned long FrameCount, |
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PlaybackState* pPlaybackState, |
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Region* pRegion |
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) { |
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// TODO: startAddrsCoarseOffset, endAddrsCoarseOffset |
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unsigned long samplestoread = FrameCount, totalreadsamples = 0, readsamples, samplestoloopend; |
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uint8_t* pDst = (uint8_t*) pBuffer; |
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SetPos(pPlaybackState->position); |
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if (pRegion->HasLoop) { |
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do { |
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samplestoloopend = pRegion->LoopEnd - GetPos(); |
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readsamples = Read(&pDst[totalreadsamples * GetFrameSize()], Min(samplestoread, samplestoloopend)); |
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samplestoread -= readsamples; |
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totalreadsamples += readsamples; |
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if (readsamples == samplestoloopend) { |
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SetPos(pRegion->LoopStart); |
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} |
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} while (samplestoread && readsamples); |
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} else { |
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totalreadsamples = Read(pBuffer, FrameCount); |
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} |
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|
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pPlaybackState->position = GetPos(); |
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|
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return totalreadsamples; |
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} |
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|
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Region::Region() { |
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pSample = NULL; |
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pInstrument = NULL; |
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loKey = hiKey = NONE; |
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minVel = maxVel = NONE; |
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startAddrsOffset = startAddrsCoarseOffset = endAddrsOffset = endAddrsCoarseOffset = 0; |
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startloopAddrsOffset = startloopAddrsCoarseOffset = endloopAddrsOffset = endloopAddrsCoarseOffset = 0; |
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pan = fineTune = coarseTune = 0; |
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overridingRootKey = -1; // -1 means not used |
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|
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HasLoop = false; |
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LoopStart = LoopEnd = 0; |
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|
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EG1PreAttackDelay = EG1Attack = EG1Hold = EG1Decay = EG1Release = ToSeconds(-12000); |
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EG1Sustain = 0; |
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EG2PreAttackDelay = EG2Attack = EG2Hold = EG2Decay = EG2Release = ToSeconds(-12000); |
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EG2Sustain = 0; |
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} |
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|
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int Region::GetUnityNote() { |
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return overridingRootKey != -1 ? overridingRootKey : pSample->OriginalPitch; |
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} |
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|
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void Region::SetGenerator(sf2::File* pFile, GenList& Gen) { |
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switch(Gen.GenOper) { |
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case START_ADDRS_OFFSET: |
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startAddrsOffset = Gen.GenAmount.wAmount; |
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break; |
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case END_ADDRS_OFFSET: |
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if (Gen.GenAmount.shAmount <= 0) { |
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endAddrsOffset = Gen.GenAmount.shAmount; |
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} else { |
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std::cerr << "Ignoring invalid endAddrsOffset" << std::endl; |
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} |
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break; |
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case STARTLOOP_ADDRS_OFFSET: |
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startloopAddrsOffset = Gen.GenAmount.shAmount; |
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LoopStart += startloopAddrsOffset; |
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break; |
297 |
case ENDLOOP_ADDRS_OFFSET: |
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endloopAddrsOffset = Gen.GenAmount.shAmount; |
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LoopEnd += endloopAddrsOffset; |
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break; |
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case START_ADDRS_COARSE_OFFSET: |
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startAddrsCoarseOffset = Gen.GenAmount.wAmount; |
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break; |
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case MOD_LFO_TO_PITCH: |
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break; |
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case VIB_LFO_TO_PITCH: |
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break; |
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case MOD_ENV_TO_PITCH: |
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break; |
310 |
case INITIAL_FILTER_FC: |
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break; |
312 |
case INITIAL_FILTER_Q: |
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break; |
314 |
case MOD_LFO_TO_FILTER_FC: |
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break; |
316 |
case MOD_ENV_TO_FILTER_FC: |
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break; |
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case END_ADDRS_COARSE_OFFSET: |
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endAddrsCoarseOffset = Gen.GenAmount.wAmount; |
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break; |
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case MOD_LFO_TO_VOLUME: |
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break; |
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case CHORUS_EFFECTS_SEND: |
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break; |
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case REVERB_EFFECTS_SEND: |
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break; |
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case PAN: |
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pan = Gen.GenAmount.shAmount; |
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pan * 64; pan /= 500; |
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if (pan < -64) pan = -64; |
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if (pan > 63) pan = 63; |
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break; |
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case DELAY_MOD_LFO: |
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break; |
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case FREQ_MOD_LFO: |
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break; |
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case DELAY_VIB_LFO: |
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break; |
339 |
case FREQ_VIB_LFO: |
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break; |
341 |
case DELAY_MOD_ENV: |
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EG2PreAttackDelay = ToSeconds(Gen.GenAmount.shAmount); |
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break; |
344 |
case ATTACK_MOD_ENV: |
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EG2Attack = ToSeconds(Gen.GenAmount.shAmount); |
346 |
break; |
347 |
case HOLD_MOD_ENV: |
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EG2Hold = ToSeconds(Gen.GenAmount.shAmount); |
349 |
break; |
350 |
case DECAY_MOD_ENV: |
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EG2Decay = ToSeconds(Gen.GenAmount.shAmount); |
352 |
break; |
353 |
case SUSTAIN_MOD_ENV: |
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EG2Sustain = 1000 - Gen.GenAmount.shAmount; |
355 |
break; |
356 |
case RELEASEMODENV: |
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EG2Release = ToSeconds(Gen.GenAmount.shAmount); |
358 |
break; |
359 |
case KEYNUM_TO_MOD_ENV_HOLD: |
360 |
break; |
361 |
case KEYNUM_TO_MOD_ENV_DECAY: |
362 |
break; |
363 |
case DELAY_VOL_ENV: |
364 |
EG1PreAttackDelay = ToSeconds(Gen.GenAmount.shAmount); |
365 |
break; |
366 |
case ATTACK_VOL_ENV: |
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EG1Attack = ToSeconds(Gen.GenAmount.shAmount); |
368 |
break; |
369 |
case HOLD_VOL_ENV: |
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EG1Hold = ToSeconds(Gen.GenAmount.shAmount); |
371 |
break; |
372 |
case DECAY_VOL_ENV: |
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EG1Decay = ToSeconds(Gen.GenAmount.shAmount); |
374 |
break; |
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case SUSTAIN_VOL_ENV: |
376 |
EG1Sustain = ToPermilles(Gen.GenAmount.shAmount); |
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break; |
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case RELEASE_VOL_ENV: |
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EG1Release = ToSeconds(Gen.GenAmount.shAmount); |
380 |
break; |
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case KEYNUM_TO_VOL_ENV_HOLD: |
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break; |
383 |
case KEYNUM_TO_VOL_ENV_DECAY: |
384 |
break; |
385 |
case INSTRUMENT: { |
386 |
uint16_t id = Gen.GenAmount.wAmount; |
387 |
if (id >= pFile->Instruments.size()) { |
388 |
throw Exception("Broken SF2 file (missing instruments)"); |
389 |
} |
390 |
pInstrument = pFile->Instruments[id]; |
391 |
break; |
392 |
} |
393 |
case KEY_RANGE: |
394 |
loKey = Gen.GenAmount.ranges.byLo; |
395 |
hiKey = Gen.GenAmount.ranges.byHi; |
396 |
break; |
397 |
case VEL_RANGE: |
398 |
minVel = Gen.GenAmount.ranges.byLo; |
399 |
maxVel = Gen.GenAmount.ranges.byHi; |
400 |
break; |
401 |
case STARTLOOP_ADDRS_COARSE_OFFSET: |
402 |
startloopAddrsCoarseOffset = Gen.GenAmount.wAmount; |
403 |
LoopStart += startloopAddrsCoarseOffset * 32768; |
404 |
break; |
405 |
case KEYNUM: |
406 |
break; |
407 |
case VELOCITY: |
408 |
break; |
409 |
case INITIAL_ATTENUATION: |
410 |
break; |
411 |
case ENDLOOP_ADDRS_COARSE_OFFSET: |
412 |
endloopAddrsCoarseOffset = Gen.GenAmount.wAmount; |
413 |
LoopEnd += endloopAddrsCoarseOffset * 32768; |
414 |
break; |
415 |
case COARSE_TUNE: |
416 |
coarseTune = Gen.GenAmount.shAmount; |
417 |
break; |
418 |
case FINE_TUNE: |
419 |
fineTune = Gen.GenAmount.shAmount; |
420 |
break; |
421 |
case SAMPLE_ID: { |
422 |
uint16_t sid = Gen.GenAmount.wAmount; |
423 |
if (sid >= pFile->Samples.size()) { |
424 |
throw Exception("Broken SF2 file (missing samples)"); |
425 |
} |
426 |
pSample = pFile->Samples[sid]; |
427 |
|
428 |
if (HasLoop) { |
429 |
LoopStart += pSample->StartLoop; |
430 |
LoopEnd += pSample->EndLoop; |
431 |
if ( LoopStart < pSample->Start || LoopStart > pSample->End || |
432 |
LoopStart > LoopEnd || LoopEnd > pSample->End ) { |
433 |
throw Exception("Broken SF2 file (invalid loops)"); |
434 |
} |
435 |
LoopStart -= pSample->Start; // Relative to the sample start |
436 |
LoopEnd -= pSample->Start; // Relative to the sample start |
437 |
} |
438 |
break; |
439 |
} |
440 |
case SAMPLE_MODES: |
441 |
HasLoop = Gen.GenAmount.wAmount & 1; |
442 |
// TODO: 3 indicates a sound which loops for the duration of key depression |
443 |
// then proceeds to play the remainder of the sample. |
444 |
break; |
445 |
case SCALE_TUNING: |
446 |
break; |
447 |
case EXCLUSIVE_CLASS: |
448 |
break; |
449 |
case OVERRIDING_ROOT_KEY: |
450 |
overridingRootKey = Gen.GenAmount.shAmount; |
451 |
break; |
452 |
} |
453 |
} |
454 |
|
455 |
void Region::SetModulator(sf2::File* pFile, ModList& Mod) { |
456 |
modulators.push_back(ModulatorItem(Mod)); |
457 |
/*switch(srcType) { |
458 |
case NO_CONTROLLER: |
459 |
break; |
460 |
case NOTE_ON_VELOCITY: |
461 |
break; |
462 |
case NOTE_ON_KEY_NUMBER: |
463 |
break; |
464 |
case POLY_PRESSURE: |
465 |
break; |
466 |
case CHANNEL_PRESSURE: |
467 |
break; |
468 |
case PITCH_WHEEL: |
469 |
break; |
470 |
case PITCH_WHEEL_SENSITIVITY: |
471 |
break; |
472 |
case LINK: |
473 |
break; |
474 |
default: std::cout << "Unknown controller source: " << srcType << std::endl; |
475 |
}*/ |
476 |
} |
477 |
|
478 |
InstrumentBase::InstrumentBase(sf2::File* pFile) { |
479 |
this->pFile = pFile; |
480 |
pGlobalRegion = NULL; |
481 |
} |
482 |
|
483 |
InstrumentBase::~InstrumentBase() { |
484 |
if (pGlobalRegion) delete pGlobalRegion; |
485 |
for (int i = regions.size() - 1; i >= 0; i--) { |
486 |
if (regions[i]) delete (regions[i]); |
487 |
} |
488 |
} |
489 |
|
490 |
int InstrumentBase::GetRegionCount() { |
491 |
return regions.size(); |
492 |
} |
493 |
|
494 |
Region* InstrumentBase::GetRegion(int idx) { |
495 |
if (idx < 0 || idx >= GetRegionCount()) { |
496 |
throw Exception("Region index out of bounds"); |
497 |
} |
498 |
|
499 |
return regions[idx]; |
500 |
} |
501 |
|
502 |
std::vector<Region*> InstrumentBase::GetRegionsOnKey(int key, uint8_t vel) { |
503 |
std::vector<Region*> v; |
504 |
for (int i = 0; i < GetRegionCount(); i++) { |
505 |
Region* r = GetRegion(i); |
506 |
if ( |
507 |
key >= r->loKey && key <= r->hiKey && |
508 |
((r->minVel == NONE && r->maxVel == NONE) || (vel >= r->minVel && vel <= r->maxVel)) |
509 |
) { |
510 |
v.push_back(r); |
511 |
} |
512 |
} |
513 |
|
514 |
return v; |
515 |
} |
516 |
|
517 |
Instrument::Instrument(sf2::File* pFile, RIFF::Chunk* ck) : InstrumentBase(pFile) { |
518 |
this->pFile = pFile; |
519 |
LoadString(ck, Name, 20); |
520 |
InstBagNdx = ck->ReadInt16(); |
521 |
} |
522 |
|
523 |
Instrument::~Instrument() { |
524 |
|
525 |
} |
526 |
|
527 |
Region* Instrument::CreateRegion() { |
528 |
Region* r = new Region; |
529 |
if (pGlobalRegion != NULL) { |
530 |
r->loKey = pGlobalRegion->loKey; |
531 |
r->hiKey = pGlobalRegion->hiKey; |
532 |
r->minVel = pGlobalRegion->minVel; |
533 |
r->maxVel = pGlobalRegion->maxVel; |
534 |
r->pan = pGlobalRegion->pan; |
535 |
r->fineTune = pGlobalRegion->fineTune; |
536 |
r->coarseTune = pGlobalRegion->coarseTune; |
537 |
r->overridingRootKey = pGlobalRegion->overridingRootKey; |
538 |
r->startAddrsOffset = pGlobalRegion->startAddrsOffset; |
539 |
r->startAddrsCoarseOffset = pGlobalRegion->startAddrsCoarseOffset; |
540 |
r->endAddrsOffset = pGlobalRegion->endAddrsOffset; |
541 |
r->endAddrsCoarseOffset = pGlobalRegion->endAddrsCoarseOffset; |
542 |
r->startloopAddrsOffset = pGlobalRegion->startloopAddrsOffset; |
543 |
r->startloopAddrsCoarseOffset = pGlobalRegion->startloopAddrsCoarseOffset; |
544 |
r->endloopAddrsOffset = pGlobalRegion->endloopAddrsOffset; |
545 |
r->endloopAddrsCoarseOffset = pGlobalRegion->endloopAddrsCoarseOffset; |
546 |
|
547 |
r->EG1PreAttackDelay = pGlobalRegion->EG1PreAttackDelay; |
548 |
r->EG1Attack = pGlobalRegion->EG1Attack; |
549 |
r->EG1Hold = pGlobalRegion->EG1Hold; |
550 |
r->EG1Decay = pGlobalRegion->EG1Decay; |
551 |
r->EG1Sustain = pGlobalRegion->EG1Sustain; |
552 |
r->EG1Release = pGlobalRegion->EG1Release; |
553 |
|
554 |
r->EG2PreAttackDelay = pGlobalRegion->EG2PreAttackDelay; |
555 |
r->EG2Attack = pGlobalRegion->EG2Attack; |
556 |
r->EG2Hold = pGlobalRegion->EG2Hold; |
557 |
r->EG2Decay = pGlobalRegion->EG2Decay; |
558 |
r->EG2Sustain = pGlobalRegion->EG2Sustain; |
559 |
r->EG2Release = pGlobalRegion->EG2Release; |
560 |
|
561 |
r->HasLoop = pGlobalRegion->HasLoop; |
562 |
r->LoopStart = pGlobalRegion->LoopStart; |
563 |
r->LoopEnd = pGlobalRegion->LoopEnd; |
564 |
} |
565 |
|
566 |
return r; |
567 |
} |
568 |
|
569 |
void Instrument::DeleteRegion(Region* pRegion) { |
570 |
for (int i = 0; i < regions.size(); i++) { |
571 |
if (regions[i] == pRegion) { |
572 |
delete pRegion; |
573 |
regions[i] = NULL; |
574 |
return; |
575 |
} |
576 |
} |
577 |
|
578 |
std::cerr << "Can't remove unknown Region" << std::endl; |
579 |
} |
580 |
|
581 |
void Instrument::LoadRegions(int idx1, int idx2) { |
582 |
for (int i = idx1; i < idx2; i++) { |
583 |
int gIdx1 = pFile->InstBags[i].InstGenNdx; |
584 |
int gIdx2 = pFile->InstBags[i + 1].InstGenNdx; |
585 |
|
586 |
if (gIdx1 < 0 || gIdx2 < 0 || gIdx1 > gIdx2 || gIdx2 >= pFile->InstGenLists.size()) { |
587 |
throw Exception("Broken SF2 file (invalid InstGenNdx)"); |
588 |
} |
589 |
|
590 |
int mIdx1 = pFile->InstBags[i].InstModNdx; |
591 |
int mIdx2 = pFile->InstBags[i + 1].InstModNdx; |
592 |
|
593 |
if (mIdx1 < 0 || mIdx2 < 0 || mIdx1 > mIdx2 || mIdx2 >= pFile->InstModLists.size()) { |
594 |
throw Exception("Broken SF2 file (invalid InstModNdx)"); |
595 |
} |
596 |
|
597 |
Region* reg = CreateRegion(); |
598 |
|
599 |
for (int j = gIdx1; j < gIdx2; j++) { |
600 |
reg->SetGenerator(pFile, pFile->InstGenLists[j]); |
601 |
// TODO: ignore generators following a sampleID generator |
602 |
} |
603 |
|
604 |
for (int j = mIdx1; j < mIdx2; j++) { |
605 |
reg->SetModulator(pFile, pFile->InstModLists[j]); |
606 |
} |
607 |
|
608 |
if (reg->pSample == NULL) { |
609 |
if (i == idx1 && idx2 - idx1 > 1) { |
610 |
pGlobalRegion = reg; // global zone |
611 |
} else { |
612 |
std::cerr << "Ignoring instrument's region without sample" << std::endl; |
613 |
delete reg; |
614 |
} |
615 |
} else { |
616 |
regions.push_back(reg); |
617 |
} |
618 |
} |
619 |
} |
620 |
|
621 |
Preset::Preset(sf2::File* pFile, RIFF::Chunk* ck): InstrumentBase(pFile) { |
622 |
this->pFile = pFile; |
623 |
LoadString(ck, Name, 20); |
624 |
PresetNum = ck->ReadInt16(); |
625 |
Bank = ck->ReadInt16(); |
626 |
PresetBagNdx = ck->ReadInt16(); |
627 |
Library = ck->ReadInt32(); |
628 |
Genre = ck->ReadInt32(); |
629 |
Morphology = ck->ReadInt32(); |
630 |
} |
631 |
|
632 |
Preset::~Preset() { |
633 |
|
634 |
} |
635 |
|
636 |
void Preset::LoadRegions(int idx1, int idx2) { |
637 |
for (int i = idx1; i < idx2; i++) { |
638 |
int gIdx1 = pFile->PresetBags[i].GenNdx; |
639 |
int gIdx2 = pFile->PresetBags[i + 1].GenNdx; |
640 |
|
641 |
if (gIdx1 < 0 || gIdx2 < 0 || gIdx1 > gIdx2 || gIdx2 >= pFile->PresetGenLists.size()) { |
642 |
throw Exception("Broken SF2 file (invalid PresetGenNdx)"); |
643 |
} |
644 |
|
645 |
Region* reg = new Region; |
646 |
|
647 |
for (int j = gIdx1; j < gIdx2; j++) { |
648 |
reg->SetGenerator(pFile, pFile->PresetGenLists[j]); |
649 |
} |
650 |
if (reg->pInstrument == NULL) { |
651 |
if (i == idx1 && idx2 - idx1 > 1) { |
652 |
pGlobalRegion = reg; // global zone |
653 |
} else { |
654 |
std::cerr << "Ignoring preset's region without instrument" << std::endl; |
655 |
delete reg; |
656 |
} |
657 |
} else { |
658 |
regions.push_back(reg); |
659 |
} |
660 |
} |
661 |
} |
662 |
|
663 |
/** @brief Constructor. |
664 |
* |
665 |
* Load an existing SF2 file. |
666 |
* |
667 |
* @param pRIFF - pointer to a RIFF file which is actually the SF2 file |
668 |
* to load |
669 |
* @throws Exception if given file is not a SF2 file, expected chunks |
670 |
* are missing |
671 |
*/ |
672 |
File::File(RIFF::File* pRIFF) { |
673 |
if (!pRIFF) throw Exception("NULL pointer reference to RIFF::File object."); |
674 |
this->pRIFF = pRIFF; |
675 |
|
676 |
if (pRIFF->GetListType() != RIFF_TYPE_SF2) { |
677 |
throw Exception("Not a SF2 file"); |
678 |
} |
679 |
|
680 |
pInfo = new Info(pRIFF); |
681 |
if (pInfo->pVer->Major != 2) { |
682 |
throw Exception("Unsupported version: " + ToString(pInfo->pVer->Major)); |
683 |
} |
684 |
|
685 |
RIFF::List* lstSDTA = pRIFF->GetSubList(LIST_TYPE_SDTA); |
686 |
if (lstSDTA == NULL) { |
687 |
throw Exception("Broken SF2 file (missing sdta)"); |
688 |
} |
689 |
|
690 |
RIFF::Chunk* pCkSmpl = lstSDTA->GetSubChunk(CHUNK_ID_SMPL); |
691 |
RIFF::Chunk* pCkSm24 = lstSDTA->GetSubChunk(CHUNK_ID_SM24); |
692 |
if (pCkSmpl != NULL && pCkSm24 != NULL) { |
693 |
long l = pCkSmpl->GetSize() / 2; |
694 |
if (l%2) l++; |
695 |
if (pCkSm24->GetSize() != l) { |
696 |
pCkSm24 = NULL; // ignoring sm24 due to invalid size |
697 |
} |
698 |
} |
699 |
|
700 |
RIFF::List* lstPDTA = pRIFF->GetSubList(LIST_TYPE_PDTA); |
701 |
if (lstPDTA == NULL) { |
702 |
throw Exception("Broken SF2 file (missing pdta)"); |
703 |
} |
704 |
|
705 |
RIFF::Chunk* ck = lstPDTA->GetSubChunk(CHUNK_ID_PHDR); |
706 |
if (ck->GetSize() < 38) { |
707 |
throw Exception("Broken SF2 file (broken phdr)"); |
708 |
} |
709 |
|
710 |
int count = ck->GetSize() / 38; |
711 |
for (int i = 0; i < count; i++) { |
712 |
Presets.push_back(new Preset(this, ck)); |
713 |
} |
714 |
|
715 |
ck = GetMandatoryChunk(lstPDTA, CHUNK_ID_PBAG); |
716 |
if (ck->GetSize() < 4 || (ck->GetSize() % 4)) { |
717 |
throw Exception("Broken SF2 file (broken pbag)"); |
718 |
} |
719 |
|
720 |
count = ck->GetSize() / 4; |
721 |
for (int i = 0; i < count; i++) { |
722 |
PresetBag pb; |
723 |
pb.GenNdx = ck->ReadInt16(); |
724 |
pb.ModNdx = ck->ReadInt16(); |
725 |
PresetBags.push_back(pb); |
726 |
} |
727 |
//std::cout << "Preset bags: " << PresetBags.size() << std::endl; |
728 |
|
729 |
ck = GetMandatoryChunk(lstPDTA, CHUNK_ID_PMOD); |
730 |
if (ck->GetSize() % 10) { |
731 |
throw Exception("Broken SF2 file (broken pmod)"); |
732 |
} |
733 |
|
734 |
count = ck->GetSize() / 10; |
735 |
for (int i = 0; i < count; i++) { |
736 |
ModList ml; |
737 |
ml.ModSrcOper = ck->ReadInt16(); |
738 |
ml.ModDestOper = ck->ReadInt16(); |
739 |
ml.ModAmount = ck->ReadInt16(); |
740 |
ml.ModAmtSrcOper = ck->ReadInt16(); |
741 |
ml.ModTransOper = ck->ReadInt16(); |
742 |
PresetModLists.push_back(ml); |
743 |
} |
744 |
//std::cout << "Preset mod lists: " << PresetModLists.size() << std::endl; |
745 |
|
746 |
ck = GetMandatoryChunk(lstPDTA, CHUNK_ID_PGEN); |
747 |
if (ck->GetSize() < 4 || (ck->GetSize() % 4)) { |
748 |
throw Exception("Broken SF2 file (broken pgen)"); |
749 |
} |
750 |
|
751 |
count = ck->GetSize() / 4; |
752 |
for (int i = 0; i < count; i++) { |
753 |
GenList gl; |
754 |
gl.GenOper = ck->ReadInt16(); |
755 |
gl.GenAmount.wAmount = ck->ReadInt16(); |
756 |
PresetGenLists.push_back(gl); |
757 |
} |
758 |
//std::cout << "Preset gen lists: " << PresetGenLists.size() << std::endl; |
759 |
|
760 |
ck = GetMandatoryChunk(lstPDTA, CHUNK_ID_INST); |
761 |
if (ck->GetSize() < (22 * 2) || (ck->GetSize() % 22)) { |
762 |
throw Exception("Broken SF2 file (broken inst)"); |
763 |
} |
764 |
count = ck->GetSize() / 22; |
765 |
for (int i = 0; i < count; i++) { |
766 |
Instruments.push_back(new Instrument(this, ck)); |
767 |
} |
768 |
|
769 |
ck = GetMandatoryChunk(lstPDTA, CHUNK_ID_IBAG); |
770 |
if (ck->GetSize() < 4 || (ck->GetSize() % 4)) { |
771 |
throw Exception("Broken SF2 file (broken ibag)"); |
772 |
} |
773 |
|
774 |
count = ck->GetSize() / 4; |
775 |
for (int i = 0; i < count; i++) { |
776 |
InstBag ib; |
777 |
ib.InstGenNdx = ck->ReadInt16(); |
778 |
ib.InstModNdx = ck->ReadInt16(); |
779 |
InstBags.push_back(ib); |
780 |
} |
781 |
//std::cout << "Instrument bags: " << InstBags.size() << std::endl; |
782 |
|
783 |
ck = GetMandatoryChunk(lstPDTA, CHUNK_ID_IMOD); |
784 |
if (ck->GetSize() % 10) { |
785 |
throw Exception("Broken SF2 file (broken imod)"); |
786 |
} |
787 |
|
788 |
count = ck->GetSize() / 10; |
789 |
for (int i = 0; i < count; i++) { |
790 |
ModList ml; |
791 |
ml.ModSrcOper = ck->ReadInt16(); |
792 |
ml.ModDestOper = ck->ReadInt16(); |
793 |
ml.ModAmount = ck->ReadInt16(); |
794 |
ml.ModAmtSrcOper = ck->ReadInt16(); |
795 |
ml.ModTransOper = ck->ReadInt16(); |
796 |
InstModLists.push_back(ml); |
797 |
} |
798 |
//std::cout << "Instrument mod lists: " << InstModLists.size() << std::endl; |
799 |
|
800 |
ck = GetMandatoryChunk(lstPDTA, CHUNK_ID_IGEN); |
801 |
if (ck->GetSize() < 4 || (ck->GetSize() % 4)) { |
802 |
throw Exception("Broken SF2 file (broken igen)"); |
803 |
} |
804 |
|
805 |
count = ck->GetSize() / 4; |
806 |
for (int i = 0; i < count; i++) { |
807 |
GenList gl; |
808 |
gl.GenOper = ck->ReadInt16(); |
809 |
gl.GenAmount.wAmount = ck->ReadInt16(); |
810 |
InstGenLists.push_back(gl); |
811 |
} |
812 |
//std::cout << "Instrument gen lists: " << InstGenLists.size() << std::endl; |
813 |
|
814 |
ck = GetMandatoryChunk(lstPDTA, CHUNK_ID_SHDR); |
815 |
if ((ck->GetSize() % 46)) { |
816 |
throw Exception("Broken SF2 file (broken shdr)"); |
817 |
} |
818 |
count = ck->GetSize() / 46; |
819 |
for (int i = 0; i < count; i++) { |
820 |
Samples.push_back(new Sample(ck, pCkSmpl, pCkSm24)); |
821 |
} |
822 |
|
823 |
// Loading instrument regions |
824 |
for (int i = 0; i < Instruments.size() - 1; i++) { |
825 |
Instrument* instr = Instruments[i]; |
826 |
int x1 = instr->InstBagNdx; |
827 |
int x2 = Instruments[i + 1]->InstBagNdx; |
828 |
if (x1 < 0 || x2 < 0 || x1 > x2 || x2 >= InstBags.size()) { |
829 |
throw Exception("Broken SF2 file (invalid InstBagNdx)"); |
830 |
} |
831 |
|
832 |
instr->LoadRegions(x1, x2); |
833 |
} |
834 |
|
835 |
// Loading preset regions |
836 |
for (int i = 0; i < Presets.size() - 1; i++) { |
837 |
Preset* preset = Presets[i]; |
838 |
int x1 = preset->PresetBagNdx; |
839 |
int x2 = Presets[i + 1]->PresetBagNdx; |
840 |
if (x1 < 0 || x2 < 0 || x1 > x2 || x2 >= PresetBags.size()) { |
841 |
throw Exception("Broken SF2 file (invalid PresetBagNdx)"); |
842 |
} |
843 |
|
844 |
preset->LoadRegions(x1, x2); |
845 |
} |
846 |
} |
847 |
|
848 |
File::~File() { |
849 |
delete pInfo; |
850 |
for (int i = Presets.size() - 1; i >= 0; i--) { |
851 |
if (Presets[i]) delete (Presets[i]); |
852 |
} |
853 |
for (int i = Instruments.size() - 1; i >= 0; i--) { |
854 |
if (Instruments[i]) delete (Instruments[i]); |
855 |
} |
856 |
for (int i = Samples.size() - 1; i >= 0; i--) { |
857 |
if (Samples[i]) delete (Samples[i]); |
858 |
} |
859 |
} |
860 |
|
861 |
int File::GetPresetCount() { |
862 |
return Presets.size() - 1; // exclude terminal preset (EOP) |
863 |
} |
864 |
|
865 |
Preset* File::GetPreset(int idx) { |
866 |
if (idx < 0 || idx >= GetPresetCount()) { |
867 |
throw Exception("Preset index out of bounds"); |
868 |
} |
869 |
|
870 |
return Presets[idx]; |
871 |
} |
872 |
|
873 |
int File::GetInstrumentCount() { |
874 |
return Instruments.size() - 1; // exclude terminal instrument (EOI) |
875 |
} |
876 |
|
877 |
Instrument* File::GetInstrument(int idx) { |
878 |
if (idx < 0 || idx >= GetInstrumentCount()) { |
879 |
throw Exception("Instrument index out of bounds"); |
880 |
} |
881 |
|
882 |
return Instruments[idx]; |
883 |
} |
884 |
|
885 |
void File::DeleteInstrument(Instrument* pInstrument) { |
886 |
for (int i = 0; i < GetPresetCount(); i++) { |
887 |
Preset* p = GetPreset(i); |
888 |
if (p == NULL) continue; |
889 |
for (int j = p->GetRegionCount() - 1; j >= 0 ; j--) { |
890 |
if (p->GetRegion(j) && p->GetRegion(j)->pInstrument == pInstrument) { |
891 |
p->GetRegion(j)->pInstrument = NULL; |
892 |
} |
893 |
} |
894 |
} |
895 |
|
896 |
for (int i = 0; i < GetInstrumentCount(); i++) { |
897 |
if (GetInstrument(i) == pInstrument) { |
898 |
Instruments[i] = NULL; |
899 |
delete pInstrument; |
900 |
} |
901 |
} |
902 |
} |
903 |
|
904 |
int File::GetSampleCount() { |
905 |
return Samples.size() - 1; // exclude terminal sample (EOS) |
906 |
} |
907 |
|
908 |
Sample* File::GetSample(int idx) { |
909 |
if (idx < 0 || idx >= GetSampleCount()) { |
910 |
throw Exception("Sample index out of bounds"); |
911 |
} |
912 |
|
913 |
return Samples[idx]; |
914 |
} |
915 |
|
916 |
void File::DeleteSample(Sample* pSample) { |
917 |
// Sanity check |
918 |
for (int i = GetInstrumentCount() - 1; i >= 0; i--) { |
919 |
Instrument* pInstr = GetInstrument(i); |
920 |
if (pInstr == NULL) continue; |
921 |
|
922 |
for (int j = pInstr->GetRegionCount() - 1; j >= 0 ; j--) { |
923 |
if (pInstr->GetRegion(j) && pInstr->GetRegion(j)->GetSample() == pSample) { |
924 |
std::cerr << "Deleting sample which is still in use" << std::endl; |
925 |
} |
926 |
} |
927 |
} |
928 |
/////// |
929 |
|
930 |
for (int i = 0; i < GetSampleCount(); i++) { |
931 |
if (Samples[i] == pSample) { |
932 |
delete pSample; |
933 |
Samples[i] = NULL; |
934 |
return; |
935 |
} |
936 |
} |
937 |
|
938 |
throw Exception("Unknown sample: " + pSample->Name); |
939 |
} |
940 |
|
941 |
bool File::HasSamples() { |
942 |
for (int i = 0; i < GetSampleCount(); i++) { |
943 |
if (Samples[i] != NULL) return true; |
944 |
} |
945 |
|
946 |
return false; |
947 |
} |
948 |
|
949 |
/** |
950 |
* Loads the whole sample wave into RAM. Use |
951 |
* ReleaseSampleData() to free the memory if you don't need the cached |
952 |
* sample data anymore. |
953 |
* |
954 |
* @returns buffer_t structure with start address and size of the buffer |
955 |
* in bytes |
956 |
* @see ReleaseSampleData(), Read(), SetPos() |
957 |
*/ |
958 |
Sample::buffer_t Sample::LoadSampleData() { |
959 |
return LoadSampleDataWithNullSamplesExtension(GetTotalFrameCount(), 0); // 0 amount of NullSamples |
960 |
} |
961 |
|
962 |
/** |
963 |
* Reads and caches the first \a SampleCount |
964 |
* numbers of SamplePoints in RAM. Use ReleaseSampleData() to free the |
965 |
* memory space if you don't need the cached samples anymore. |
966 |
* Read the <i>Size</i> member of the <i>buffer_t</i> structure |
967 |
* that will be returned to determine the actual cached samples, but note |
968 |
* that the size is given in bytes! You get the number of actually cached |
969 |
* samples by dividing it by the frame size of the sample: |
970 |
* @code |
971 |
* buffer_t buf = pSample->LoadSampleData(acquired_samples); |
972 |
* long cachedsamples = buf.Size / pSample->FrameSize; |
973 |
* @endcode |
974 |
* |
975 |
* @param SampleCount - number of sample points to load into RAM |
976 |
* @returns buffer_t structure with start address and size of |
977 |
* the cached sample data in bytes |
978 |
* @see ReleaseSampleData(), Read(), SetPos() |
979 |
*/ |
980 |
Sample::buffer_t Sample::LoadSampleData(unsigned long SampleCount) { |
981 |
return LoadSampleDataWithNullSamplesExtension(SampleCount, 0); // 0 amount of NullSamples |
982 |
} |
983 |
|
984 |
/** |
985 |
* Loads the whole sample wave into RAM. Use |
986 |
* ReleaseSampleData() to free the memory if you don't need the cached |
987 |
* sample data anymore. |
988 |
* The method will add \a NullSamplesCount silence samples past the |
989 |
* official buffer end (this won't affect the 'Size' member of the |
990 |
* buffer_t structure, that means 'Size' always reflects the size of the |
991 |
* actual sample data, the buffer might be bigger though). Silence |
992 |
* samples past the official buffer are needed for differential |
993 |
* algorithms that always have to take subsequent samples into account |
994 |
* (resampling/interpolation would be an important example) and avoids |
995 |
* memory access faults in such cases. |
996 |
* |
997 |
* @param NullSamplesCount - number of silence samples the buffer should |
998 |
* be extended past it's data end |
999 |
* @returns buffer_t structure with start address and |
1000 |
* size of the buffer in bytes |
1001 |
* @see ReleaseSampleData(), Read(), SetPos() |
1002 |
*/ |
1003 |
Sample::buffer_t Sample::LoadSampleDataWithNullSamplesExtension(uint NullSamplesCount) { |
1004 |
return LoadSampleDataWithNullSamplesExtension(GetTotalFrameCount(), NullSamplesCount); |
1005 |
} |
1006 |
|
1007 |
/** |
1008 |
* Reads and caches the first \a SampleCount |
1009 |
* numbers of SamplePoints in RAM. Use ReleaseSampleData() to free the |
1010 |
* memory space if you don't need the cached samples anymore. |
1011 |
* Read the <i>Size</i> member of the <i>buffer_t</i> structure |
1012 |
* that will be returned to determine the actual cached samples, but note |
1013 |
* that the size is given in bytes! You get the number of actually cached |
1014 |
* samples by dividing it by the frame size of the sample: |
1015 |
* @code |
1016 |
* buffer_t buf = pSample->LoadSampleDataWithNullSamplesExtension(acquired_samples, null_samples); |
1017 |
* long cachedsamples = buf.Size / pSample->FrameSize; |
1018 |
* @endcode |
1019 |
* The method will add \a NullSamplesCount silence samples past the |
1020 |
* official buffer end (this won't affect the 'Size' member of the |
1021 |
* buffer_t structure, that means 'Size' always reflects the size of the |
1022 |
* actual sample data, the buffer might be bigger though). Silence |
1023 |
* samples past the official buffer are needed for differential |
1024 |
* algorithms that always have to take subsequent samples into account |
1025 |
* (resampling/interpolation would be an important example) and avoids |
1026 |
* memory access faults in such cases. |
1027 |
* |
1028 |
* @param SampleCount - number of sample points to load into RAM |
1029 |
* @param NullSamplesCount - number of silence samples the buffer should |
1030 |
* be extended past it's data end |
1031 |
* @returns buffer_t structure with start address and |
1032 |
* size of the cached sample data in bytes |
1033 |
* @see ReleaseSampleData(), Read(), SetPos() |
1034 |
*/ |
1035 |
Sample::buffer_t Sample::LoadSampleDataWithNullSamplesExtension(unsigned long SampleCount, uint NullSamplesCount) { |
1036 |
if (SampleCount > GetTotalFrameCount()) SampleCount = GetTotalFrameCount(); |
1037 |
if (RAMCache.pStart) delete[] (int8_t*) RAMCache.pStart; |
1038 |
unsigned long allocationsize = (SampleCount + NullSamplesCount) * GetFrameSize(); |
1039 |
SetPos(0); // reset read position to begin of sample |
1040 |
RAMCache.pStart = new int8_t[allocationsize]; |
1041 |
RAMCache.Size = Read(RAMCache.pStart, SampleCount) * GetFrameSize(); |
1042 |
RAMCache.NullExtensionSize = allocationsize - RAMCache.Size; |
1043 |
// fill the remaining buffer space with silence samples |
1044 |
memset((int8_t*)RAMCache.pStart + RAMCache.Size, 0, RAMCache.NullExtensionSize); |
1045 |
return GetCache(); |
1046 |
} |
1047 |
|
1048 |
/** |
1049 |
* Returns current cached sample points. A buffer_t structure will be |
1050 |
* returned which contains address pointer to the begin of the cache and |
1051 |
* the size of the cached sample data in bytes. Use |
1052 |
* <i>LoadSampleData()</i> to cache a specific amount of sample points in |
1053 |
* RAM. |
1054 |
* |
1055 |
* @returns buffer_t structure with current cached sample points |
1056 |
* @see LoadSampleData(); |
1057 |
*/ |
1058 |
Sample::buffer_t Sample::GetCache() { |
1059 |
// return a copy of the buffer_t structure |
1060 |
buffer_t result; |
1061 |
result.Size = this->RAMCache.Size; |
1062 |
result.pStart = this->RAMCache.pStart; |
1063 |
result.NullExtensionSize = this->RAMCache.NullExtensionSize; |
1064 |
return result; |
1065 |
} |
1066 |
|
1067 |
/** |
1068 |
* Frees the cached sample from RAM if loaded with |
1069 |
* <i>LoadSampleData()</i> previously. |
1070 |
* |
1071 |
* @see LoadSampleData(); |
1072 |
*/ |
1073 |
void Sample::ReleaseSampleData() { |
1074 |
if (RAMCache.pStart) delete[] (int8_t*) RAMCache.pStart; |
1075 |
RAMCache.pStart = NULL; |
1076 |
RAMCache.Size = 0; |
1077 |
RAMCache.NullExtensionSize = 0; |
1078 |
} |
1079 |
|
1080 |
/** |
1081 |
* Sets the position within the sample (in sample points, not in |
1082 |
* bytes). Use this method and <i>Read()</i> if you don't want to load |
1083 |
* the sample into RAM, thus for disk streaming. |
1084 |
* |
1085 |
* @param SampleCount number of sample points to jump |
1086 |
* @returns the new sample position |
1087 |
* @see Read() |
1088 |
*/ |
1089 |
unsigned long Sample::SetPos(unsigned long SampleCount) { |
1090 |
pCkSmpl->SetPos((Start * 2) + (SampleCount * 2), RIFF::stream_start); |
1091 |
if(pCkSm24) pCkSm24->SetPos(Start + SampleCount, RIFF::stream_start); |
1092 |
return SampleCount; |
1093 |
} |
1094 |
|
1095 |
/** |
1096 |
* Returns the current position in the sample (in sample points). |
1097 |
*/ |
1098 |
unsigned long Sample::GetPos() { |
1099 |
return (pCkSmpl->GetPos() - (Start * 2)) / 2; |
1100 |
} |
1101 |
|
1102 |
/** |
1103 |
* Reads \a SampleCount number of sample points from the current |
1104 |
* position into the buffer pointed by \a pBuffer and increments the |
1105 |
* position within the sample. Use this method |
1106 |
* and <i>SetPos()</i> if you don't want to load the sample into RAM, |
1107 |
* thus for disk streaming. |
1108 |
* |
1109 |
* For 16 bit samples, the data in the buffer will be int16_t |
1110 |
* (using native endianness). For 24 bit, the buffer will |
1111 |
* contain three bytes per sample, little-endian. |
1112 |
* |
1113 |
* @param pBuffer destination buffer |
1114 |
* @param SampleCount number of sample points to read |
1115 |
* @returns number of successfully read sample points |
1116 |
* @see SetPos() |
1117 |
*/ |
1118 |
unsigned long Sample::Read(void* pBuffer, unsigned long SampleCount) { |
1119 |
// TODO: startAddrsCoarseOffset, endAddrsCoarseOffset |
1120 |
if (SampleCount == 0) return 0; |
1121 |
long pos = GetPos(); |
1122 |
if (pos + SampleCount > GetTotalFrameCount()) SampleCount = GetTotalFrameCount() - pos; |
1123 |
|
1124 |
if (GetFrameSize() / GetChannelCount() == 3 /* 24 bit */) { |
1125 |
uint8_t* pBuf = (uint8_t*)pBuffer; |
1126 |
if (SampleType == MONO_SAMPLE || SampleType == ROM_MONO_SAMPLE) { |
1127 |
pCkSmpl->Read(pBuf, SampleCount, 2); |
1128 |
pCkSm24->Read(pBuf + SampleCount * 2, SampleCount, 1); |
1129 |
for (int i = SampleCount - 1; i >= 0; i--) { |
1130 |
pBuf[i*3] = pBuf[(SampleCount * 2) + i]; |
1131 |
pBuf[i*3 + 2] = pBuf[i*2 + 1]; |
1132 |
pBuf[i*3 + 1] = pBuf[i*2]; |
1133 |
} |
1134 |
} else if (SampleType == LEFT_SAMPLE || SampleType == ROM_LEFT_SAMPLE) { |
1135 |
pCkSmpl->Read(pBuf, SampleCount, 2); |
1136 |
pCkSm24->Read(pBuf + SampleCount * 2, SampleCount, 1); |
1137 |
for (int i = SampleCount - 1; i >= 0; i--) { |
1138 |
pBuf[i*6] = pBuf[(SampleCount * 2) + i]; |
1139 |
pBuf[i*6 + 2] = pBuf[i*2 + 1]; |
1140 |
pBuf[i*6 + 1] = pBuf[i*2]; |
1141 |
pBuf[i*6 + 3] = pBuf[i*6 + 4] = pBuf[i*6 + 5] = 0; |
1142 |
} |
1143 |
} else if (SampleType == RIGHT_SAMPLE || SampleType == ROM_RIGHT_SAMPLE) { |
1144 |
pCkSmpl->Read(pBuf, SampleCount, 2); |
1145 |
pCkSm24->Read(pBuf + SampleCount * 2, SampleCount, 1); |
1146 |
for (int i = SampleCount - 1; i >= 0; i--) { |
1147 |
pBuf[i*6 + 3] = pBuf[(SampleCount * 2) + i]; |
1148 |
pBuf[i*6 + 5] = pBuf[i*2 + 1]; |
1149 |
pBuf[i*6 + 4] = pBuf[i*2]; |
1150 |
pBuf[i*6] = pBuf[i*6 + 1] = pBuf[i*6 + 2] = 0; |
1151 |
} |
1152 |
} |
1153 |
} else { |
1154 |
if (SampleType == MONO_SAMPLE || SampleType == ROM_MONO_SAMPLE) { |
1155 |
return pCkSmpl->Read(pBuffer, SampleCount, 2); |
1156 |
} |
1157 |
|
1158 |
int16_t* pBuf = (int16_t*)pBuffer; |
1159 |
if (SampleType == LEFT_SAMPLE || SampleType == ROM_LEFT_SAMPLE) { |
1160 |
pCkSmpl->Read(pBuf, SampleCount, 2); |
1161 |
for (int i = SampleCount - 1; i >= 0; i--) { |
1162 |
pBuf[i*2] = pBuf[i]; |
1163 |
pBuf[i*2 + 1] = 0; |
1164 |
} |
1165 |
} else if (SampleType == RIGHT_SAMPLE || SampleType == ROM_RIGHT_SAMPLE) { |
1166 |
pCkSmpl->Read(pBuf, SampleCount, 2); |
1167 |
for (int i = SampleCount - 1; i >= 0; i--) { |
1168 |
pBuf[i*2] = 0; |
1169 |
pBuf[i*2 + 1] = pBuf[i]; |
1170 |
} |
1171 |
} |
1172 |
} |
1173 |
|
1174 |
if (pCkSmpl->GetPos() > (End * 2)) { |
1175 |
std::cerr << "Read after the sample end. This is a BUG!" << std::endl; |
1176 |
std::cerr << "Current position: " << GetPos() << std::endl; |
1177 |
std::cerr << "Total number of frames: " << GetTotalFrameCount() << std::endl << std::endl; |
1178 |
} |
1179 |
return SampleCount; |
1180 |
} |
1181 |
|
1182 |
|
1183 |
// *************** functions *************** |
1184 |
// * |
1185 |
|
1186 |
/** |
1187 |
* Returns the name of this C++ library. |
1188 |
*/ |
1189 |
String libraryName() { |
1190 |
return PACKAGE; |
1191 |
} |
1192 |
|
1193 |
/** |
1194 |
* Returns version of this C++ library. |
1195 |
*/ |
1196 |
String libraryVersion() { |
1197 |
return VERSION; |
1198 |
} |
1199 |
|
1200 |
} // namespace sf2 |