engines/common/SampleFile.cpp

/***************************************************************************
 *                                                                         *
 *   LinuxSampler - modular, streaming capable sampler                     *
 *                                                                         *
 *   Copyright (C) 2003 - 2009 Christian Schoenebeck                       *
 *   Copyright (C) 2009 Grigor Iliev                                       *
 *                                                                         *
 *   This program is free software; you can redistribute it and/or modify  *
 *   it under the terms of the GNU General Public License as published by  *
 *   the Free Software Foundation; either version 2 of the License, or     *
 *   (at your option) any later version.                                   *
 *                                                                         *
 *   This program is distributed in the hope that it will be useful,       *
 *   but WITHOUT ANY WARRANTY; without even the implied warranty of        *
 *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the         *
 *   GNU General Public License for more details.                          *
 *                                                                         *
 *   You should have received a copy of the GNU General Public License     *
 *   along with this program; if not, write to the Free Software           *
 *   Foundation, Inc., 59 Temple Place, Suite 330, Boston,                 *
 *   MA  02111-1307  USA                                                   *
 ***************************************************************************/

#include "SampleFile.h"
#include "../../common/Exception.h"

#include <cstring>

namespace LinuxSampler {
    #if CONFIG_DEVMODE
    int SampleFile_OpenFilesCount = 0;
    #endif

    SampleFile::SampleFile(String File, bool DontClose) {
        this->File      = File;
        this->pSndFile  = NULL;

        SF_INFO sfInfo;
        sfInfo.format = 0;
        pSndFile = sf_open(File.c_str(), SFM_READ, &sfInfo);
        if(pSndFile == NULL) throw Exception(File + ": Can't get sample info: " + String(sf_strerror (NULL)));
        #if CONFIG_DEVMODE
        std::cout << "Number of opened sample files: " << ++SampleFile_OpenFilesCount << std::endl;
        #endif
        SampleRate = sfInfo.samplerate;
        ChannelCount = sfInfo.channels;
        Format = sfInfo.format;

        switch(Format & 0xF) {
            case SF_FORMAT_PCM_S8:
            case SF_FORMAT_PCM_U8:
            case SF_FORMAT_DPCM_8:
                FrameSize = ChannelCount;
                break;
            case SF_FORMAT_PCM_16:
            case SF_FORMAT_DPCM_16:
                FrameSize = 2 * ChannelCount;
                break;
            case SF_FORMAT_PCM_24:
            case SF_FORMAT_DWVW_24:
                FrameSize = 3 * ChannelCount;
                break;
            default:
                FrameSize = 2 * ChannelCount;
        }
        TotalFrameCount = sfInfo.frames;

        if(!DontClose) Close();
    }

    SampleFile::~SampleFile() {
        Close();
        ReleaseSampleData();
    }

    void SampleFile::Open() {
        if(pSndFile) return; // Already opened
        SF_INFO sfInfo;
        sfInfo.format = 0;
        pSndFile = sf_open(File.c_str(), SFM_READ, &sfInfo);
        if(pSndFile == NULL) throw Exception(File + ": Can't load sample");
        #if CONFIG_DEVMODE
        std::cout << "Number of opened sample files: " << ++SampleFile_OpenFilesCount << std::endl;
        #endif
    }

    void SampleFile::Close() {
        if(pSndFile == NULL) return;
        if(sf_close(pSndFile)) std::cerr << "Sample::Close() " << "Failed to close " << File << std::endl;
        pSndFile = NULL;
        #if CONFIG_DEVMODE
        std::cout << "Number of opened sample files: " << --SampleFile_OpenFilesCount << std::endl;
        #endif
    }

    long SampleFile::SetPos(unsigned long FrameOffset) {
        return SetPos(FrameOffset, SEEK_SET);
    }

    long SampleFile::SetPos(unsigned long FrameCount, int Whence) {
        if(pSndFile == NULL) {
            std::cerr << "Sample::SetPos() " << File << " not opened" << std::endl;
            return -1;
        }

        return sf_seek(pSndFile, FrameCount, Whence);
    }

    long SampleFile::GetPos() {
        if(pSndFile == NULL) {
            std::cerr << "Sample::GetPos() " << File << " not opened" << std::endl;
            return -1;
        }

        return sf_seek(pSndFile, 0, SEEK_CUR);
    }

    Sample::buffer_t SampleFile::LoadSampleData() {
        return LoadSampleDataWithNullSamplesExtension(this->TotalFrameCount, 0); // 0 amount of NullSamples
    }

    Sample::buffer_t SampleFile::LoadSampleData(unsigned long FrameCount) {
        return LoadSampleDataWithNullSamplesExtension(FrameCount, 0); // 0 amount of NullSamples
    }

    Sample::buffer_t SampleFile::LoadSampleDataWithNullSamplesExtension(uint NullFrameCount) {
        return LoadSampleDataWithNullSamplesExtension(this->TotalFrameCount, NullFrameCount);
    }

    Sample::buffer_t SampleFile::LoadSampleDataWithNullSamplesExtension(unsigned long FrameCount, uint NullFramesCount) {
        Open();
        if (FrameCount > this->TotalFrameCount) FrameCount = this->TotalFrameCount;
        if (RAMCache.pStart) delete[] (int8_t*) RAMCache.pStart;
        unsigned long allocationsize = (FrameCount + NullFramesCount) * this->FrameSize;
        SetPos(0, SEEK_SET); // reset read position to begin of sample
        RAMCache.pStart            = new int8_t[allocationsize];

        RAMCache.Size = Read(RAMCache.pStart, FrameCount) * this->FrameSize;
        RAMCache.NullExtensionSize = allocationsize - RAMCache.Size;
        // fill the remaining buffer space with silence samples
        memset((int8_t*)RAMCache.pStart + RAMCache.Size, 0, RAMCache.NullExtensionSize);
        Close();
        return GetCache();
    }

    long SampleFile::Read(void* pBuffer, unsigned long FrameCount) {
        Open();
        int bytes = sf_read_raw(pSndFile, pBuffer, FrameCount * GetFrameSize());
        return bytes / GetFrameSize();
    }

    unsigned long SampleFile::ReadAndLoop (
        void*           pBuffer,
        unsigned long   FrameCount,
        PlaybackState*  pPlaybackState
    ) {
        // TODO:
        SetPos(pPlaybackState->position);
        unsigned long count = Read(pBuffer, FrameCount);
        pPlaybackState->position = GetPos();
        return count;
    }

    void SampleFile::ReleaseSampleData() {
        if (RAMCache.pStart) delete[] (int8_t*) RAMCache.pStart;
        RAMCache.pStart = NULL;
        RAMCache.Size   = 0;
        RAMCache.NullExtensionSize = 0;
    }

    Sample::buffer_t SampleFile::GetCache() {
        // return a copy of the buffer_t structure
        buffer_t result;
        result.Size              = this->RAMCache.Size;
        result.pStart            = this->RAMCache.pStart;
        result.NullExtensionSize = this->RAMCache.NullExtensionSize;
        return result;
    }
} // namespace LinuxSampler
1	iliev	2012	/***************************************************************************
2			* *
3			* LinuxSampler - modular, streaming capable sampler *
4			* *
5			* Copyright (C) 2003 - 2009 Christian Schoenebeck *
6			* Copyright (C) 2009 Grigor Iliev *
7			* *
8			* This program is free software; you can redistribute it and/or modify *
9			* it under the terms of the GNU General Public License as published by *
10			* the Free Software Foundation; either version 2 of the License, or *
11			* (at your option) any later version. *
12			* *
13			* This program is distributed in the hope that it will be useful, *
14			* but WITHOUT ANY WARRANTY; without even the implied warranty of *
15			* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
16			* GNU General Public License for more details. *
17			* *
18			* You should have received a copy of the GNU General Public License *
19			* along with this program; if not, write to the Free Software *
20			* Foundation, Inc., 59 Temple Place, Suite 330, Boston, *
21			* MA 02111-1307 USA *
22			***************************************************************************/
23
24			#include "SampleFile.h"
25			#include "../../common/Exception.h"
26
27			#include <cstring>
28
29			namespace LinuxSampler {
30			#if CONFIG_DEVMODE
31			int SampleFile_OpenFilesCount = 0;
32			#endif
33
34			SampleFile::SampleFile(String File, bool DontClose) {
35			this->File = File;
36			this->pSndFile = NULL;
37
38			SF_INFO sfInfo;
39			sfInfo.format = 0;
40			pSndFile = sf_open(File.c_str(), SFM_READ, &sfInfo);
41			if(pSndFile == NULL) throw Exception(File + ": Can't get sample info: " + String(sf_strerror (NULL)));
42			#if CONFIG_DEVMODE
43			std::cout << "Number of opened sample files: " << ++SampleFile_OpenFilesCount << std::endl;
44			#endif
45			SampleRate = sfInfo.samplerate;
46			ChannelCount = sfInfo.channels;
47			Format = sfInfo.format;
48
49			switch(Format & 0xF) {
50			case SF_FORMAT_PCM_S8:
51			case SF_FORMAT_PCM_U8:
52	iliev	2019	case SF_FORMAT_DPCM_8:
53			FrameSize = ChannelCount;
54			break;
55	iliev	2012	case SF_FORMAT_PCM_16:
56			case SF_FORMAT_DPCM_16:
57	iliev	2019	FrameSize = 2 * ChannelCount;
58	iliev	2012	break;
59	iliev	2019	case SF_FORMAT_PCM_24:
60			case SF_FORMAT_DWVW_24:
61			FrameSize = 3 * ChannelCount;
62			break;
63	iliev	2012	default:
64	iliev	2019	FrameSize = 2 * ChannelCount;
65	iliev	2012	}
66			TotalFrameCount = sfInfo.frames;
67
68			if(!DontClose) Close();
69			}
70
71			SampleFile::~SampleFile() {
72			Close();
73	persson	2058	ReleaseSampleData();
74	iliev	2012	}
75
76			void SampleFile::Open() {
77			if(pSndFile) return; // Already opened
78			SF_INFO sfInfo;
79			sfInfo.format = 0;
80			pSndFile = sf_open(File.c_str(), SFM_READ, &sfInfo);
81			if(pSndFile == NULL) throw Exception(File + ": Can't load sample");
82			#if CONFIG_DEVMODE
83			std::cout << "Number of opened sample files: " << ++SampleFile_OpenFilesCount << std::endl;
84			#endif
85			}
86
87			void SampleFile::Close() {
88			if(pSndFile == NULL) return;
89			if(sf_close(pSndFile)) std::cerr << "Sample::Close() " << "Failed to close " << File << std::endl;
90			pSndFile = NULL;
91			#if CONFIG_DEVMODE
92			std::cout << "Number of opened sample files: " << --SampleFile_OpenFilesCount << std::endl;
93			#endif
94			}
95
96			long SampleFile::SetPos(unsigned long FrameOffset) {
97			return SetPos(FrameOffset, SEEK_SET);
98			}
99
100			long SampleFile::SetPos(unsigned long FrameCount, int Whence) {
101			if(pSndFile == NULL) {
102			std::cerr << "Sample::SetPos() " << File << " not opened" << std::endl;
103			return -1;
104			}
105
106			return sf_seek(pSndFile, FrameCount, Whence);
107			}
108
109			long SampleFile::GetPos() {
110			if(pSndFile == NULL) {
111			std::cerr << "Sample::GetPos() " << File << " not opened" << std::endl;
112			return -1;
113			}
114
115			return sf_seek(pSndFile, 0, SEEK_CUR);
116			}
117
118			Sample::buffer_t SampleFile::LoadSampleData() {
119			return LoadSampleDataWithNullSamplesExtension(this->TotalFrameCount, 0); // 0 amount of NullSamples
120			}
121
122			Sample::buffer_t SampleFile::LoadSampleData(unsigned long FrameCount) {
123			return LoadSampleDataWithNullSamplesExtension(FrameCount, 0); // 0 amount of NullSamples
124			}
125
126			Sample::buffer_t SampleFile::LoadSampleDataWithNullSamplesExtension(uint NullFrameCount) {
127			return LoadSampleDataWithNullSamplesExtension(this->TotalFrameCount, NullFrameCount);
128			}
129
130			Sample::buffer_t SampleFile::LoadSampleDataWithNullSamplesExtension(unsigned long FrameCount, uint NullFramesCount) {
131			Open();
132			if (FrameCount > this->TotalFrameCount) FrameCount = this->TotalFrameCount;
133			if (RAMCache.pStart) delete[] (int8_t*) RAMCache.pStart;
134			unsigned long allocationsize = (FrameCount + NullFramesCount) * this->FrameSize;
135			SetPos(0, SEEK_SET); // reset read position to begin of sample
136			RAMCache.pStart = new int8_t[allocationsize];
137
138			RAMCache.Size = Read(RAMCache.pStart, FrameCount) * this->FrameSize;
139			RAMCache.NullExtensionSize = allocationsize - RAMCache.Size;
140			// fill the remaining buffer space with silence samples
141			memset((int8_t*)RAMCache.pStart + RAMCache.Size, 0, RAMCache.NullExtensionSize);
142			Close();
143			return GetCache();
144			}
145
146			long SampleFile::Read(void* pBuffer, unsigned long FrameCount) {
147			Open();
148	iliev	2019	int bytes = sf_read_raw(pSndFile, pBuffer, FrameCount * GetFrameSize());
149			return bytes / GetFrameSize();
150	iliev	2012	}
151
152			unsigned long SampleFile::ReadAndLoop (
153			void* pBuffer,
154			unsigned long FrameCount,
155			PlaybackState* pPlaybackState
156			) {
157			// TODO:
158			SetPos(pPlaybackState->position);
159	iliev	2018	unsigned long count = Read(pBuffer, FrameCount);
160	iliev	2012	pPlaybackState->position = GetPos();
161	iliev	2018	return count;
162	iliev	2012	}
163
164			void SampleFile::ReleaseSampleData() {
165			if (RAMCache.pStart) delete[] (int8_t*) RAMCache.pStart;
166			RAMCache.pStart = NULL;
167			RAMCache.Size = 0;
168			RAMCache.NullExtensionSize = 0;
169			}
170
171			Sample::buffer_t SampleFile::GetCache() {
172			// return a copy of the buffer_t structure
173			buffer_t result;
174			result.Size = this->RAMCache.Size;
175			result.pStart = this->RAMCache.pStart;
176			result.NullExtensionSize = this->RAMCache.NullExtensionSize;
177			return result;
178			}
179			} // namespace LinuxSampler