Glenn Maynard
146 lines
2.7 KiB
C++
146 lines
2.7 KiB
C++
#include "global.h"
|
|
#include "RageSoundReader_Preload.h"
|
|
#include "PrefsManager.h"
|
|
|
|
const int channels = 2;
|
|
const int samplesize = 2 * channels; /* 16-bit */
|
|
|
|
/* If a sound is smaller than this, we'll load it entirely into memory. */
|
|
const int max_prebuf_size = 1024*256;
|
|
|
|
int SoundReader_Preload::total_samples() const
|
|
{
|
|
return buf.get().size() / samplesize;
|
|
}
|
|
|
|
bool SoundReader_Preload::Open(SoundReader *source)
|
|
{
|
|
ASSERT(source);
|
|
samplerate = source->GetSampleRate();
|
|
|
|
/* Check the length, and see if we think it'll fit in the buffer. */
|
|
int len = source->GetLength_Fast();
|
|
if(len != -1)
|
|
{
|
|
float secs = len / 1000.f;
|
|
|
|
int pcmsize = int(secs * samplerate * samplesize); /* seconds -> bytes */
|
|
if(pcmsize > max_prebuf_size)
|
|
return false; /* Don't bother trying to preload it. */
|
|
|
|
buf.get_owned().reserve(pcmsize);
|
|
}
|
|
|
|
while(1) {
|
|
char buffer[1024];
|
|
int cnt = source->Read(buffer, sizeof(buffer));
|
|
|
|
if(cnt < 0) {
|
|
/* XXX untested */
|
|
SetError(source->GetError());
|
|
return false;
|
|
}
|
|
|
|
if(!cnt) break; /* eof */
|
|
|
|
/* Add the buffer. */
|
|
buf.get_owned().append(buffer, buffer+cnt);
|
|
|
|
if(buf.get_owned().size() > max_prebuf_size)
|
|
return false; /* too big */
|
|
}
|
|
|
|
position = 0;
|
|
delete source;
|
|
return true;
|
|
}
|
|
|
|
int SoundReader_Preload::GetLength() const
|
|
{
|
|
return int(float(total_samples()) * 1000.f / samplerate);
|
|
}
|
|
|
|
int SoundReader_Preload::GetLength_Fast() const
|
|
{
|
|
return GetLength();
|
|
}
|
|
|
|
int SoundReader_Preload::SetPosition_Accurate(int ms)
|
|
{
|
|
const int sample = int((ms / 1000.0f) * samplerate);
|
|
position = sample * samplesize;
|
|
|
|
if(position >= int(buf.get().size()))
|
|
position = 0;
|
|
|
|
return position;
|
|
}
|
|
|
|
int SoundReader_Preload::SetPosition_Fast(int ms)
|
|
{
|
|
return SetPosition_Accurate(ms);
|
|
}
|
|
|
|
int SoundReader_Preload::Read(char *buffer, unsigned len)
|
|
{
|
|
const unsigned bytes_avail = buf.get().size() - position;
|
|
|
|
len = min(len, bytes_avail);
|
|
memcpy(buffer, buf.get().data()+position, len);
|
|
position += len;
|
|
|
|
return len;
|
|
}
|
|
|
|
SoundReader *SoundReader_Preload::Copy() const
|
|
{
|
|
return new SoundReader_Preload(*this);
|
|
}
|
|
|
|
rc_string::rc_string()
|
|
{
|
|
buf = new string;
|
|
cnt = new int(1);
|
|
}
|
|
|
|
rc_string::rc_string(const rc_string &rhs)
|
|
{
|
|
buf = rhs.buf;
|
|
cnt = rhs.cnt;
|
|
(*cnt)++;
|
|
}
|
|
|
|
rc_string::~rc_string()
|
|
{
|
|
(*cnt)--;
|
|
if(!*cnt)
|
|
{
|
|
delete buf;
|
|
delete cnt;
|
|
}
|
|
}
|
|
|
|
string &rc_string::get_owned()
|
|
{
|
|
if(*cnt != 1)
|
|
{
|
|
(*cnt)--;
|
|
buf = new string(*buf);
|
|
cnt = new int(1);
|
|
}
|
|
|
|
return *buf;
|
|
}
|
|
|
|
const string &rc_string::get() const
|
|
{
|
|
return *buf;
|
|
}
|
|
|
|
/*
|
|
-----------------------------------------------------------------------------
|
|
Copyright (c) 2003 by the person(s) listed below. All rights reserved.
|
|
Glenn Maynard
|
|
-----------------------------------------------------------------------------
|
|
*/
|