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_PCM_16:
            case SF_FORMAT_DPCM_8:
            case SF_FORMAT_DPCM_16:
                FrameSize = sizeof(short) * ChannelCount;
                break;
            default:
                FrameSize = sizeof(int) * ChannelCount;
        }
        TotalFrameCount = sfInfo.frames;

        if(!DontClose) Close();
    }

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

    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();
        if(FrameSize == sizeof(short) * ChannelCount) {
            return sf_readf_short(pSndFile, (short*)pBuffer, FrameCount);
        } else {
            return sf_readf_int(pSndFile, (int*)pBuffer, FrameCount);
        }
    }

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

    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	/***************************************************************************
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	case SF_FORMAT_PCM_16:
53	case SF_FORMAT_DPCM_8:
54	case SF_FORMAT_DPCM_16:
55	FrameSize = sizeof(short) * ChannelCount;
56	break;
57	default:
58	FrameSize = sizeof(int) * ChannelCount;
59	}
60	TotalFrameCount = sfInfo.frames;
61
62	if(!DontClose) Close();
63	}
64
65	SampleFile::~SampleFile() {
66	Close();
67	}
68
69	void SampleFile::Open() {
70	if(pSndFile) return; // Already opened
71	SF_INFO sfInfo;
72	sfInfo.format = 0;
73	pSndFile = sf_open(File.c_str(), SFM_READ, &sfInfo);
74	if(pSndFile == NULL) throw Exception(File + ": Can't load sample");
75	#if CONFIG_DEVMODE
76	std::cout << "Number of opened sample files: " << ++SampleFile_OpenFilesCount << std::endl;
77	#endif
78	}
79
80	void SampleFile::Close() {
81	if(pSndFile == NULL) return;
82	if(sf_close(pSndFile)) std::cerr << "Sample::Close() " << "Failed to close " << File << std::endl;
83	pSndFile = NULL;
84	#if CONFIG_DEVMODE
85	std::cout << "Number of opened sample files: " << --SampleFile_OpenFilesCount << std::endl;
86	#endif
87	}
88
89	long SampleFile::SetPos(unsigned long FrameOffset) {
90	return SetPos(FrameOffset, SEEK_SET);
91	}
92
93	long SampleFile::SetPos(unsigned long FrameCount, int Whence) {
94	if(pSndFile == NULL) {
95	std::cerr << "Sample::SetPos() " << File << " not opened" << std::endl;
96	return -1;
97	}
98
99	return sf_seek(pSndFile, FrameCount, Whence);
100	}
101
102	long SampleFile::GetPos() {
103	if(pSndFile == NULL) {
104	std::cerr << "Sample::GetPos() " << File << " not opened" << std::endl;
105	return -1;
106	}
107
108	return sf_seek(pSndFile, 0, SEEK_CUR);
109	}
110
111	Sample::buffer_t SampleFile::LoadSampleData() {
112	return LoadSampleDataWithNullSamplesExtension(this->TotalFrameCount, 0); // 0 amount of NullSamples
113	}
114
115	Sample::buffer_t SampleFile::LoadSampleData(unsigned long FrameCount) {
116	return LoadSampleDataWithNullSamplesExtension(FrameCount, 0); // 0 amount of NullSamples
117	}
118
119	Sample::buffer_t SampleFile::LoadSampleDataWithNullSamplesExtension(uint NullFrameCount) {
120	return LoadSampleDataWithNullSamplesExtension(this->TotalFrameCount, NullFrameCount);
121	}
122
123	Sample::buffer_t SampleFile::LoadSampleDataWithNullSamplesExtension(unsigned long FrameCount, uint NullFramesCount) {
124	Open();
125	if (FrameCount > this->TotalFrameCount) FrameCount = this->TotalFrameCount;
126	if (RAMCache.pStart) delete[] (int8_t*) RAMCache.pStart;
127	unsigned long allocationsize = (FrameCount + NullFramesCount) * this->FrameSize;
128	SetPos(0, SEEK_SET); // reset read position to begin of sample
129	RAMCache.pStart = new int8_t[allocationsize];
130
131	RAMCache.Size = Read(RAMCache.pStart, FrameCount) * this->FrameSize;
132	RAMCache.NullExtensionSize = allocationsize - RAMCache.Size;
133	// fill the remaining buffer space with silence samples
134	memset((int8_t*)RAMCache.pStart + RAMCache.Size, 0, RAMCache.NullExtensionSize);
135	Close();
136	return GetCache();
137	}
138
139	long SampleFile::Read(void* pBuffer, unsigned long FrameCount) {
140	Open();
141	if(FrameSize == sizeof(short) * ChannelCount) {
142	return sf_readf_short(pSndFile, (short*)pBuffer, FrameCount);
143	} else {
144	return sf_readf_int(pSndFile, (int*)pBuffer, FrameCount);
145	}
146	}
147
148	unsigned long SampleFile::ReadAndLoop (
149	void* pBuffer,
150	unsigned long FrameCount,
151	PlaybackState* pPlaybackState
152	) {
153	// TODO:
154	SetPos(pPlaybackState->position);
155	Read(pBuffer, FrameCount);
156	pPlaybackState->position = GetPos();
157	}
158
159	void SampleFile::ReleaseSampleData() {
160	if (RAMCache.pStart) delete[] (int8_t*) RAMCache.pStart;
161	RAMCache.pStart = NULL;
162	RAMCache.Size = 0;
163	RAMCache.NullExtensionSize = 0;
164	}
165
166	Sample::buffer_t SampleFile::GetCache() {
167	// return a copy of the buffer_t structure
168	buffer_t result;
169	result.Size = this->RAMCache.Size;
170	result.pStart = this->RAMCache.pStart;
171	result.NullExtensionSize = this->RAMCache.NullExtensionSize;
172	return result;
173	}
174	} // namespace LinuxSampler