463 lines
9.5 KiB
C++
463 lines
9.5 KiB
C++
/*
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Audio File Library
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Copyright (C) 2000-2001, Silicon Graphics, Inc.
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This library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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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 GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with this library; if not, write to the
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Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
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Boston, MA 02110-1301 USA
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*/
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#include "config.h"
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#include <stdlib.h>
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#include <assert.h>
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#include <string.h>
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#ifdef HAVE_UNISTD_H
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#include <unistd.h>
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#endif
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#include <audiofile.h>
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#include "File.h"
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#include "FileHandle.h"
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#include "Instrument.h"
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#include "Marker.h"
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#include "Setup.h"
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#include "Track.h"
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#include "afinternal.h"
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#include "modules/Module.h"
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#include "modules/ModuleState.h"
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#include "units.h"
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#include "util.h"
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static status _afOpenFile (int access, File *f, const char *filename,
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AFfilehandle *file, AFfilesetup filesetup);
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int _af_identify (File *f, int *implemented)
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{
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if (!f->canSeek())
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{
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_af_error(AF_BAD_LSEEK, "Cannot seek in file");
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return AF_FILE_UNKNOWN;
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}
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AFfileoffset curpos = f->tell();
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for (int i=0; i<_AF_NUM_UNITS; i++)
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{
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if (_af_units[i].recognize &&
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_af_units[i].recognize(f))
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{
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if (implemented != NULL)
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*implemented = _af_units[i].implemented;
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f->seek(curpos, File::SeekFromBeginning);
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return _af_units[i].fileFormat;
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}
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}
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f->seek(curpos, File::SeekFromBeginning);
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if (implemented != NULL)
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*implemented = false;
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return AF_FILE_UNKNOWN;
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}
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int afIdentifyFD (int fd)
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{
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/*
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Duplicate the file descriptor since otherwise the
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original file descriptor would get closed when we close
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the virtual file below.
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*/
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fd = dup(fd);
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File *f = File::create(fd, File::ReadAccess);
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int result = _af_identify(f, NULL);
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delete f;
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return result;
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}
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int afIdentifyNamedFD (int fd, const char *filename, int *implemented)
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{
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/*
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Duplicate the file descriptor since otherwise the
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original file descriptor would get closed when we close
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the virtual file below.
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*/
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fd = dup(fd);
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File *f = File::create(fd, File::ReadAccess);
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if (!f)
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{
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_af_error(AF_BAD_OPEN, "could not open file '%s'", filename);
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return AF_FILE_UNKNOWN;
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}
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int result = _af_identify(f, implemented);
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delete f;
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return result;
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}
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AFfilehandle afOpenFD (int fd, const char *mode, AFfilesetup setup)
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{
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if (!mode)
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{
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_af_error(AF_BAD_ACCMODE, "null access mode");
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return AF_NULL_FILEHANDLE;
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}
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int access;
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if (mode[0] == 'r')
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{
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access = _AF_READ_ACCESS;
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}
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else if (mode[0] == 'w')
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{
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access = _AF_WRITE_ACCESS;
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}
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else
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{
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_af_error(AF_BAD_ACCMODE, "unrecognized access mode '%s'", mode);
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return AF_NULL_FILEHANDLE;
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}
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File *f = File::create(fd, access == _AF_READ_ACCESS ?
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File::ReadAccess : File::WriteAccess);
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AFfilehandle filehandle = NULL;
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if (_afOpenFile(access, f, NULL, &filehandle, setup) != AF_SUCCEED)
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{
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delete f;
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}
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return filehandle;
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}
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AFfilehandle afOpenNamedFD (int fd, const char *mode, AFfilesetup setup,
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const char *filename)
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{
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if (!mode)
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{
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_af_error(AF_BAD_ACCMODE, "null access mode");
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return AF_NULL_FILEHANDLE;
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}
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int access;
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if (mode[0] == 'r')
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access = _AF_READ_ACCESS;
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else if (mode[0] == 'w')
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access = _AF_WRITE_ACCESS;
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else
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{
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_af_error(AF_BAD_ACCMODE, "unrecognized access mode '%s'", mode);
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return AF_NULL_FILEHANDLE;
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}
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File *f = File::create(fd, access == _AF_READ_ACCESS ?
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File::ReadAccess : File::WriteAccess);
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AFfilehandle filehandle;
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if (_afOpenFile(access, f, filename, &filehandle, setup) != AF_SUCCEED)
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{
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delete f;
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}
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return filehandle;
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}
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AFfilehandle afOpenFile (const char *filename, const char *mode, AFfilesetup setup)
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{
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if (!mode)
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{
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_af_error(AF_BAD_ACCMODE, "null access mode");
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return AF_NULL_FILEHANDLE;
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}
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int access;
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if (mode[0] == 'r')
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{
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access = _AF_READ_ACCESS;
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}
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else if (mode[0] == 'w')
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{
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access = _AF_WRITE_ACCESS;
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}
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else
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{
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_af_error(AF_BAD_ACCMODE, "unrecognized access mode '%s'", mode);
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return AF_NULL_FILEHANDLE;
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}
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File *f = File::open(filename,
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access == _AF_READ_ACCESS ? File::ReadAccess : File::WriteAccess);
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if (!f)
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{
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_af_error(AF_BAD_OPEN, "could not open file '%s'", filename);
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return AF_NULL_FILEHANDLE;
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}
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AFfilehandle filehandle;
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if (_afOpenFile(access, f, filename, &filehandle, setup) != AF_SUCCEED)
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{
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delete f;
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}
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return filehandle;
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}
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AFfilehandle afOpenVirtualFile (AFvirtualfile *vf, const char *mode,
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AFfilesetup setup)
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{
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if (!vf)
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{
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_af_error(AF_BAD_OPEN, "null virtual file");
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return AF_NULL_FILEHANDLE;
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}
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if (!mode)
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{
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_af_error(AF_BAD_ACCMODE, "null access mode");
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return AF_NULL_FILEHANDLE;
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}
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int access;
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if (mode[0] == 'r')
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{
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access = _AF_READ_ACCESS;
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}
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else if (mode[0] == 'w')
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{
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access = _AF_WRITE_ACCESS;
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}
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else
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{
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_af_error(AF_BAD_ACCMODE, "unrecognized access mode '%s'", mode);
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return AF_NULL_FILEHANDLE;
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}
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File *f = File::create(vf,
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access == _AF_READ_ACCESS ? File::ReadAccess : File::WriteAccess);
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if (!f)
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{
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_af_error(AF_BAD_OPEN, "could not open virtual file");
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return AF_NULL_FILEHANDLE;
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}
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AFfilehandle filehandle;
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if (_afOpenFile(access, f, NULL, &filehandle, setup) != AF_SUCCEED)
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{
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delete f;
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}
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return filehandle;
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}
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static status _afOpenFile (int access, File *f, const char *filename,
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AFfilehandle *file, AFfilesetup filesetup)
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{
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int fileFormat = AF_FILE_UNKNOWN;
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int implemented = true;
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int userSampleFormat = 0;
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double userSampleRate = 0.0;
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PCMInfo userPCM = {0};
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bool userFormatSet = false;
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AFfilehandle filehandle = AF_NULL_FILEHANDLE;
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AFfilesetup completesetup = AF_NULL_FILESETUP;
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*file = AF_NULL_FILEHANDLE;
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if (access == _AF_WRITE_ACCESS || filesetup != AF_NULL_FILESETUP)
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{
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if (!_af_filesetup_ok(filesetup))
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return AF_FAIL;
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fileFormat = filesetup->fileFormat;
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if (access == _AF_READ_ACCESS && fileFormat != AF_FILE_RAWDATA)
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{
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_af_error(AF_BAD_FILESETUP,
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"warning: opening file for read access: "
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"ignoring file setup with non-raw file format");
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filesetup = AF_NULL_FILESETUP;
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fileFormat = _af_identify(f, &implemented);
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}
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}
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else if (filesetup == AF_NULL_FILESETUP)
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fileFormat = _af_identify(f, &implemented);
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if (fileFormat == AF_FILE_UNKNOWN)
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{
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if (filename != NULL)
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_af_error(AF_BAD_NOT_IMPLEMENTED,
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"'%s': unrecognized audio file format",
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filename);
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else
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_af_error(AF_BAD_NOT_IMPLEMENTED,
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"unrecognized audio file format");
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return AF_FAIL;
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}
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const char *formatName = _af_units[fileFormat].name;
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if (!implemented)
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{
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_af_error(AF_BAD_NOT_IMPLEMENTED,
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"%s format not currently supported", formatName);
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}
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completesetup = NULL;
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if (filesetup != AF_NULL_FILESETUP)
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{
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userSampleFormat = filesetup->tracks[0].f.sampleFormat;
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userPCM = filesetup->tracks[0].f.pcm;
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userSampleRate = filesetup->tracks[0].f.sampleRate;
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userFormatSet = true;
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if ((completesetup = _af_units[fileFormat].completesetup(filesetup)) == NULL)
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return AF_FAIL;
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}
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filehandle = _AFfilehandle::create(fileFormat);
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if (!filehandle)
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{
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if (completesetup)
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afFreeFileSetup(completesetup);
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return AF_FAIL;
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}
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filehandle->m_fh = f;
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filehandle->m_access = access;
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filehandle->m_seekok = f->canSeek();
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if (filename != NULL)
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filehandle->m_fileName = strdup(filename);
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else
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filehandle->m_fileName = NULL;
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filehandle->m_fileFormat = fileFormat;
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status result = access == _AF_READ_ACCESS ?
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filehandle->readInit(completesetup) :
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filehandle->writeInit(completesetup);
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if (result != AF_SUCCEED)
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{
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delete filehandle;
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filehandle = AF_NULL_FILEHANDLE;
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if (completesetup)
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afFreeFileSetup(completesetup);
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return AF_FAIL;
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}
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if (completesetup)
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afFreeFileSetup(completesetup);
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/*
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Initialize virtual format.
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*/
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for (int t=0; t<filehandle->m_trackCount; t++)
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{
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Track *track = &filehandle->m_tracks[t];
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track->v = track->f;
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if (userFormatSet)
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{
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track->v.sampleFormat = userSampleFormat;
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track->v.pcm = userPCM;
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track->v.sampleRate = userSampleRate;
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}
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track->v.compressionType = AF_COMPRESSION_NONE;
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track->v.compressionParams = NULL;
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#if WORDS_BIGENDIAN
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track->v.byteOrder = AF_BYTEORDER_BIGENDIAN;
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#else
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track->v.byteOrder = AF_BYTEORDER_LITTLEENDIAN;
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#endif
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track->ms = new ModuleState();
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if (track->ms->init(filehandle, track) == AF_FAIL)
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{
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delete filehandle;
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return AF_FAIL;
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}
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}
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*file = filehandle;
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return AF_SUCCEED;
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}
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int afSyncFile (AFfilehandle handle)
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{
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if (!_af_filehandle_ok(handle))
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return -1;
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if (handle->m_access == _AF_WRITE_ACCESS)
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{
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/* Finish writes on all tracks. */
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for (int trackno = 0; trackno < handle->m_trackCount; trackno++)
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{
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Track *track = &handle->m_tracks[trackno];
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if (track->ms->isDirty() && track->ms->setup(handle, track) == AF_FAIL)
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return -1;
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if (track->ms->sync(handle, track) != AF_SUCCEED)
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return -1;
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}
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/* Update file headers. */
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if (handle->update() != AF_SUCCEED)
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return AF_FAIL;
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}
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else if (handle->m_access == _AF_READ_ACCESS)
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{
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/* Do nothing. */
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}
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else
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{
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_af_error(AF_BAD_ACCMODE, "unrecognized access mode %d",
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handle->m_access);
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return AF_FAIL;
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}
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return AF_SUCCEED;
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}
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int afCloseFile (AFfilehandle file)
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{
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int err;
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if (!_af_filehandle_ok(file))
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return -1;
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afSyncFile(file);
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err = file->m_fh->close();
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if (err < 0)
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_af_error(AF_BAD_CLOSE, "close returned %d", err);
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delete file->m_fh;
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delete file;
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return 0;
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}
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