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Move the linear resampler to RageSoundReader_Resample_Fast.

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Add RageSoundReader_Resample_Good, using libresample.
This commit is contained in:
Glenn Maynard
2003-09-24 22:31:34 +00:00
parent 83c58f3b3a
commit 6954e0facf
6 changed files with 440 additions and 113 deletions
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stepmania/src/RageSoundReader_Resample.cpp
+16 -96
View File
@@ -1,103 +1,23 @@
#include "global.h"
#include "RageSoundReader_Resample.h"
#include "RageSoundReader_Resample_Fast.h"
#include "RageSoundReader_Resample_Good.h"
RageSoundReader_Resample::RageSoundReader_Resample()
RageSoundReader_Resample *RageSoundReader_Resample::MakeResampler( ResampleQuality q )
{
source = NULL;
samplerate = -1;
}
void RageSoundReader_Resample::Open(SoundReader *source_)
{
source = source_;
ASSERT(source);
samplerate = source->GetSampleRate();
resamp.SetInputSampleRate(samplerate);
}
RageSoundReader_Resample::~RageSoundReader_Resample()
{
delete source;
}
void RageSoundReader_Resample::SetSampleRate(int hz)
{
samplerate = hz;
resamp.SetOutputSampleRate(samplerate);
}
int RageSoundReader_Resample::GetLength() const
{
resamp.reset();
return source->GetLength();
}
int RageSoundReader_Resample::GetLength_Fast() const
{
resamp.reset();
return source->GetLength_Fast();
}
int RageSoundReader_Resample::SetPosition_Accurate(int ms)
{
resamp.reset();
return source->SetPosition_Accurate(ms);
}
int RageSoundReader_Resample::SetPosition_Fast(int ms)
{
resamp.reset();
return source->SetPosition_Fast(ms);
}
static const int BUFSIZE = 1024*16;
int RageSoundReader_Resample::Read(char *buf, unsigned len)
{
int bytes_read = 0;
while(len)
switch( q )
{
int size = resamp.read(buf, len);
if(size == -1)
break;
buf += size;
len -= size;
bytes_read += size;
if(size == 0)
{
static char buf[BUFSIZE];
int cnt = source->Read(buf, sizeof(buf));
if(cnt == -1)
{
SetError(source->GetError());
return -1;
}
if(cnt == 0)
resamp.eof();
else
resamp.write(buf, cnt);
}
case RESAMP_FAST:
return new RageSoundReader_Resample_Fast;
case RESAMP_NORMAL:
case RESAMP_HIGHQUALITY:
{
RageSoundReader_Resample_Good *ret = new RageSoundReader_Resample_Good;
ret->SetHighQuality( q == RESAMP_HIGHQUALITY );
return ret;
}
default:
ASSERT(0);
return NULL;
}
return bytes_read;
}
SoundReader *RageSoundReader_Resample::Copy() const
{
SoundReader *new_source = source->Copy();
RageSoundReader_Resample *ret = new RageSoundReader_Resample;
ret->Open(new_source);
ret->SetSampleRate(samplerate);
return ret;
}
/*
* Copyright (c) 2003 by the person(s) listed below. All rights reserved.
* Glenn Maynard
*/