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/*************************************************************************** |
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* * |
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* LinuxSampler - modular, streaming capable sampler * |
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* * |
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* Copyright (C) 2003 - 2009 Christian Schoenebeck * |
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* Copyright (C) 2009 Grigor Iliev * |
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* * |
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* This program 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 program is distributed in the hope that it will be useful, * |
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* but WITHOUT ANY WARRANTY; without even the implied warranty of * |
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * |
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* GNU General Public License for more details. * |
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* * |
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* You should have received a copy of the GNU General Public License * |
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* along with this program; if not, write to the Free Software * |
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, * |
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* MA 02111-1307 USA * |
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***************************************************************************/ |
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|
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#include "SampleFile.h" |
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#include "../../common/global_private.h" |
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#include "../../common/Exception.h" |
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|
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#include <cstring> |
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|
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namespace LinuxSampler { |
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#if CONFIG_DEVMODE |
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int SampleFile_OpenFilesCount = 0; |
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#endif |
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|
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SampleFile::SampleFile(String File, bool DontClose) { |
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this->File = File; |
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this->pSndFile = NULL; |
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|
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SF_INFO sfInfo; |
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sfInfo.format = 0; |
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pSndFile = sf_open(File.c_str(), SFM_READ, &sfInfo); |
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if(pSndFile == NULL) throw Exception(File + ": Can't get sample info: " + String(sf_strerror (NULL))); |
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#if CONFIG_DEVMODE |
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std::cout << "Number of opened sample files: " << ++SampleFile_OpenFilesCount << std::endl; |
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#endif |
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SampleRate = sfInfo.samplerate; |
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ChannelCount = sfInfo.channels; |
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Format = sfInfo.format; |
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|
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switch(Format & SF_FORMAT_SUBMASK) { |
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case SF_FORMAT_PCM_S8: |
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case SF_FORMAT_PCM_U8: |
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case SF_FORMAT_DPCM_8: |
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FrameSize = ChannelCount; |
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break; |
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case SF_FORMAT_PCM_16: |
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case SF_FORMAT_DPCM_16: |
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FrameSize = 2 * ChannelCount; |
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break; |
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case SF_FORMAT_PCM_24: |
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case SF_FORMAT_DWVW_24: |
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FrameSize = 3 * ChannelCount; |
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break; |
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default: |
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FrameSize = 2 * ChannelCount; |
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} |
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TotalFrameCount = sfInfo.frames; |
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|
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if(!DontClose) Close(); |
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} |
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|
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SampleFile::~SampleFile() { |
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Close(); |
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ReleaseSampleData(); |
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} |
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|
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void SampleFile::Open() { |
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if(pSndFile) return; // Already opened |
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SF_INFO sfInfo; |
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sfInfo.format = 0; |
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pSndFile = sf_open(File.c_str(), SFM_READ, &sfInfo); |
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if(pSndFile == NULL) throw Exception(File + ": Can't load sample"); |
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#if CONFIG_DEVMODE |
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std::cout << "Number of opened sample files: " << ++SampleFile_OpenFilesCount << std::endl; |
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#endif |
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} |
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|
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void SampleFile::Close() { |
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if(pSndFile == NULL) return; |
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if(sf_close(pSndFile)) std::cerr << "Sample::Close() " << "Failed to close " << File << std::endl; |
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pSndFile = NULL; |
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#if CONFIG_DEVMODE |
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std::cout << "Number of opened sample files: " << --SampleFile_OpenFilesCount << std::endl; |
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#endif |
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} |
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|
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long SampleFile::SetPos(unsigned long FrameOffset) { |
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return SetPos(FrameOffset, SEEK_SET); |
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} |
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|
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long SampleFile::SetPos(unsigned long FrameCount, int Whence) { |
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if(pSndFile == NULL) { |
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std::cerr << "Sample::SetPos() " << File << " not opened" << std::endl; |
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return -1; |
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} |
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|
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return sf_seek(pSndFile, FrameCount, Whence); |
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} |
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|
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long SampleFile::GetPos() { |
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if(pSndFile == NULL) { |
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std::cerr << "Sample::GetPos() " << File << " not opened" << std::endl; |
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return -1; |
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} |
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|
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return sf_seek(pSndFile, 0, SEEK_CUR); |
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} |
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|
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Sample::buffer_t SampleFile::LoadSampleData() { |
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return LoadSampleDataWithNullSamplesExtension(this->TotalFrameCount, 0); // 0 amount of NullSamples |
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} |
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|
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Sample::buffer_t SampleFile::LoadSampleData(unsigned long FrameCount) { |
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return LoadSampleDataWithNullSamplesExtension(FrameCount, 0); // 0 amount of NullSamples |
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} |
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|
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Sample::buffer_t SampleFile::LoadSampleDataWithNullSamplesExtension(uint NullFrameCount) { |
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return LoadSampleDataWithNullSamplesExtension(this->TotalFrameCount, NullFrameCount); |
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} |
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|
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Sample::buffer_t SampleFile::LoadSampleDataWithNullSamplesExtension(unsigned long FrameCount, uint NullFramesCount) { |
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Open(); |
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if (FrameCount > this->TotalFrameCount) FrameCount = this->TotalFrameCount; |
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if (RAMCache.pStart) delete[] (int8_t*) RAMCache.pStart; |
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unsigned long allocationsize = (FrameCount + NullFramesCount) * this->FrameSize; |
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SetPos(0, SEEK_SET); // reset read position to begin of sample |
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RAMCache.pStart = new int8_t[allocationsize]; |
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|
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RAMCache.Size = Read(RAMCache.pStart, FrameCount) * this->FrameSize; |
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RAMCache.NullExtensionSize = allocationsize - RAMCache.Size; |
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// fill the remaining buffer space with silence samples |
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memset((int8_t*)RAMCache.pStart + RAMCache.Size, 0, RAMCache.NullExtensionSize); |
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Close(); |
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return GetCache(); |
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} |
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|
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long SampleFile::Read(void* pBuffer, unsigned long FrameCount) { |
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Open(); |
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|
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// ogg files must be read with sf_readf, not sf_read_raw. On |
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// big endian machines, sf_readf_short is also used for 16 bit |
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// wav files, to get automatic endian conversion (for 24 bit |
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// samples this is handled in Synthesize::GetSample instead). |
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|
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#if WORDS_BIGENDIAN || HAVE_DECL_SF_FORMAT_VORBIS |
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if ( |
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#if WORDS_BIGENDIAN |
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FrameSize == 2 * ChannelCount |
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#else |
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(Format & SF_FORMAT_SUBMASK) == SF_FORMAT_VORBIS |
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#endif |
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) { |
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return sf_readf_short(pSndFile, static_cast<short*>(pBuffer), FrameCount); |
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} else |
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#endif |
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{ |
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int bytes = sf_read_raw(pSndFile, pBuffer, FrameCount * GetFrameSize()); |
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return bytes / GetFrameSize(); |
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} |
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} |
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|
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unsigned long SampleFile::ReadAndLoop ( |
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void* pBuffer, |
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unsigned long FrameCount, |
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PlaybackState* pPlaybackState |
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) { |
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// TODO: |
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SetPos(pPlaybackState->position); |
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unsigned long count = Read(pBuffer, FrameCount); |
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pPlaybackState->position = GetPos(); |
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return count; |
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} |
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|
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void SampleFile::ReleaseSampleData() { |
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if (RAMCache.pStart) delete[] (int8_t*) RAMCache.pStart; |
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RAMCache.pStart = NULL; |
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RAMCache.Size = 0; |
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RAMCache.NullExtensionSize = 0; |
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} |
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|
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Sample::buffer_t SampleFile::GetCache() { |
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// return a copy of the buffer_t structure |
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buffer_t result; |
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result.Size = this->RAMCache.Size; |
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result.pStart = this->RAMCache.pStart; |
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result.NullExtensionSize = this->RAMCache.NullExtensionSize; |
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return result; |
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} |
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} // namespace LinuxSampler |
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