sm64pc/tools/audiofile-0.3.6/libaudiofile/format.cpp

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2020-05-07 18:21:22 +00:00
/*
Audio File Library
Copyright (C) 1998-2000, Michael Pruett <michael@68k.org>
Copyright (C) 2000, Silicon Graphics, Inc.
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
This library 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
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with this library; if not, write to the
Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
Boston, MA 02110-1301 USA
*/
/*
audiofile.c
This file implements many of the main interface routines of the
Audio File Library.
*/
#include "config.h"
#include <assert.h>
#include <stdint.h>
#include <stdlib.h>
#include <string.h>
#include "FileHandle.h"
#include "Setup.h"
#include "Track.h"
#include "afinternal.h"
#include "audiofile.h"
#include "modules/Module.h"
#include "modules/ModuleState.h"
#include "units.h"
#include "util.h"
AFfileoffset afGetDataOffset (AFfilehandle file, int trackid)
{
if (!_af_filehandle_ok(file))
return -1;
Track *track = file->getTrack(trackid);
if (!track)
return -1;
return track->fpos_first_frame;
}
AFfileoffset afGetTrackBytes (AFfilehandle file, int trackid)
{
if (!_af_filehandle_ok(file))
return -1;
Track *track = file->getTrack(trackid);
if (!track)
return -1;
return track->data_size;
}
/*
afGetFrameSize returns the size (in bytes) of a sample frame from
the specified track of an audio file.
stretch3to4 == true: size which user sees
stretch3to4 == false: size used in file
*/
float afGetFrameSize (AFfilehandle file, int trackid, int stretch3to4)
{
if (!_af_filehandle_ok(file))
return -1;
Track *track = file->getTrack(trackid);
if (!track)
return -1;
return _af_format_frame_size(&track->f, stretch3to4);
}
float afGetVirtualFrameSize (AFfilehandle file, int trackid, int stretch3to4)
{
if (!_af_filehandle_ok(file))
return -1;
Track *track = file->getTrack(trackid);
if (!track)
return -1;
return _af_format_frame_size(&track->v, stretch3to4);
}
AFframecount afSeekFrame (AFfilehandle file, int trackid, AFframecount frame)
{
if (!_af_filehandle_ok(file))
return -1;
if (!file->checkCanRead())
return -1;
Track *track = file->getTrack(trackid);
if (!track)
return -1;
if (track->ms->isDirty() && track->ms->setup(file, track) == AF_FAIL)
return -1;
if (frame < 0)
return track->nextvframe;
/* Optimize the case of seeking to the current position. */
if (frame == track->nextvframe)
return track->nextvframe;
/* Limit request to the number of frames in the file. */
if (track->totalvframes != -1)
if (frame > track->totalvframes)
frame = track->totalvframes - 1;
/*
Now that the modules are not dirty and frame
represents a valid virtual frame, we call
_AFsetupmodules again after setting track->nextvframe.
_AFsetupmodules will look at track->nextvframe and
compute track->nextfframe in clever and mysterious
ways.
*/
track->nextvframe = frame;
if (track->ms->setup(file, track) == AF_FAIL)
return -1;
return track->nextvframe;
}
AFfileoffset afTellFrame (AFfilehandle file, int trackid)
{
return afSeekFrame(file, trackid, -1);
}
int afSetVirtualByteOrder (AFfilehandle file, int trackid, int byteorder)
{
if (!_af_filehandle_ok(file))
return AF_FAIL;
Track *track = file->getTrack(trackid);
if (!track)
return AF_FAIL;
if (byteorder != AF_BYTEORDER_BIGENDIAN &&
byteorder != AF_BYTEORDER_LITTLEENDIAN)
{
_af_error(AF_BAD_BYTEORDER, "invalid byte order %d", byteorder);
return AF_FAIL;
}
track->v.byteOrder = byteorder;
track->ms->setDirty();
return AF_SUCCEED;
}
int afGetByteOrder (AFfilehandle file, int trackid)
{
if (!_af_filehandle_ok(file))
return -1;
Track *track = file->getTrack(trackid);
if (!track)
return -1;
return track->f.byteOrder;
}
int afGetVirtualByteOrder (AFfilehandle file, int trackid)
{
if (!_af_filehandle_ok(file))
return -1;
Track *track = file->getTrack(trackid);
if (!track)
return -1;
return track->v.byteOrder;
}
AFframecount afGetFrameCount (AFfilehandle file, int trackid)
{
if (!_af_filehandle_ok(file))
return -1;
Track *track = file->getTrack(trackid);
if (!track)
return -1;
if (track->ms->isDirty() && track->ms->setup(file, track) == AF_FAIL)
return -1;
return track->totalvframes;
}
double afGetRate (AFfilehandle file, int trackid)
{
if (!_af_filehandle_ok(file))
return -1;
Track *track = file->getTrack(trackid);
if (!track)
return -1;
return track->f.sampleRate;
}
int afGetChannels (AFfilehandle file, int trackid)
{
if (!_af_filehandle_ok(file))
return -1;
Track *track = file->getTrack(trackid);
if (!track)
return -1;
return track->f.channelCount;
}
void afGetSampleFormat (AFfilehandle file, int trackid, int *sampleFormat, int *sampleWidth)
{
if (!_af_filehandle_ok(file))
return;
Track *track = file->getTrack(trackid);
if (!track)
return;
if (sampleFormat)
*sampleFormat = track->f.sampleFormat;
if (sampleWidth)
*sampleWidth = track->f.sampleWidth;
}
void afGetVirtualSampleFormat (AFfilehandle file, int trackid, int *sampleFormat, int *sampleWidth)
{
if (!_af_filehandle_ok(file))
return;
Track *track = file->getTrack(trackid);
if (!track)
return;
if (sampleFormat)
*sampleFormat = track->v.sampleFormat;
if (sampleWidth)
*sampleWidth = track->v.sampleWidth;
}
int afSetVirtualSampleFormat (AFfilehandle file, int trackid,
int sampleFormat, int sampleWidth)
{
if (!_af_filehandle_ok(file))
return -1;
Track *track = file->getTrack(trackid);
if (!track)
return -1;
if (_af_set_sample_format(&track->v, sampleFormat, sampleWidth) == AF_FAIL)
return -1;
track->ms->setDirty();
return 0;
}
/* XXXmpruett fix the version */
int afGetFileFormat (AFfilehandle file, int *version)
{
if (!_af_filehandle_ok(file))
return -1;
if (version != NULL)
*version = file->getVersion();
return file->m_fileFormat;
}
int afSetVirtualChannels (AFfilehandle file, int trackid, int channelCount)
{
if (!_af_filehandle_ok(file))
return -1;
Track *track = file->getTrack(trackid);
if (!track)
return -1;
track->v.channelCount = channelCount;
track->ms->setDirty();
if (track->channelMatrix)
free(track->channelMatrix);
track->channelMatrix = NULL;
return 0;
}
double afGetVirtualRate (AFfilehandle file, int trackid)
{
if (!_af_filehandle_ok(file))
return -1;
Track *track = file->getTrack(trackid);
if (!track)
return -1;
return track->v.sampleRate;
}
int afSetVirtualRate (AFfilehandle file, int trackid, double rate)
{
if (!_af_filehandle_ok(file))
return -1;
Track *track = file->getTrack(trackid);
if (!track)
return -1;
if (rate < 0)
{
_af_error(AF_BAD_RATE, "invalid sampling rate %.30g", rate);
return -1;
}
track->v.sampleRate = rate;
track->ms->setDirty();
return 0;
}
void afSetChannelMatrix (AFfilehandle file, int trackid, double* matrix)
{
if (!_af_filehandle_ok(file))
return;
Track *track = file->getTrack(trackid);
if (!track)
return;
if (track->channelMatrix != NULL)
free(track->channelMatrix);
track->channelMatrix = NULL;
if (matrix != NULL)
{
int i, size;
size = track->v.channelCount * track->f.channelCount;
track->channelMatrix = (double *) malloc(size * sizeof (double));
for (i = 0; i < size; i++)
track->channelMatrix[i] = matrix[i];
}
}
int afGetVirtualChannels (AFfilehandle file, int trackid)
{
if (!_af_filehandle_ok(file))
return -1;
Track *track = file->getTrack(trackid);
if (!track)
return -1;
return track->v.channelCount;
}