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#include "gvLogitechPS2Codecs.h"
#include <liblgcodec.h>
#if !defined(_PS2)
#error This file should only be used with the PlayStation2
#endif
static GVBool GVILGCodecInitialized;
static int GVILGCodecHandle;
static int GVILGCodecBytesPerFrame;
static int GVILGCodecSamplesPerFrame;
static int GVILGCodecEncodedFrameSize;
static GVSample * GVILGCodecDecodeBuffer;
GVBool gviLGCodecInitialize(const char * name)
{
lgCodecDesc * codecDesc;
int i;
int rcode;
// check if the lib hasn't been initialized
if(!GVILGCodecInitialized)
{
// initialize it
rcode = lgCodecInit();
if(LGCODEC_FAILED(rcode))
return GVFalse;
// we're now initialized
GVILGCodecInitialized = GVTrue;
}
// find the codec
for(i = 0 ; (codecDesc = lgCodecEnumerate(i)) ; i++)
{
// check if the name matches
if(strcmp(codecDesc->name, name) == 0)
break;
}
// check if we didn't find it
if(!codecDesc)
return GVFalse;
// allocate memory for the decode buffer
GVILGCodecDecodeBuffer = (GVSample *)gsimalloc((unsigned int)codecDesc->bytes_per_pcm_frame);
if(!GVILGCodecDecodeBuffer)
return GVFalse;
// open a handle to the codec
rcode = lgCodecOpen(codecDesc->id, &GVILGCodecHandle);
if(LGCODEC_FAILED(rcode))
{
gsifree(GVILGCodecDecodeBuffer);
return GVFalse;
}
// store the codec info
GVILGCodecBytesPerFrame = codecDesc->bytes_per_pcm_frame;
GVILGCodecSamplesPerFrame = (int)(GVILGCodecBytesPerFrame / GV_BYTES_PER_SAMPLE);
GVILGCodecEncodedFrameSize = codecDesc->bytes_per_enc_frame;
return GVTrue;
}
void gviLGCodecCleanup(void)
{
gsifree(GVILGCodecDecodeBuffer);
GVILGCodecDecodeBuffer = NULL;
lgCodecClose(GVILGCodecHandle);
}
int gviLGCodecGetSamplesPerFrame(void)
{
return GVILGCodecSamplesPerFrame;
}
int gviLGCodecGetEncodedFrameSize(void)
{
return GVILGCodecEncodedFrameSize;
}
void gviLGCodecEncode(GVByte * out, const GVSample * in)
{
int destSize = GVILGCodecEncodedFrameSize;
lgCodecEncode(GVILGCodecHandle, in, GVILGCodecBytesPerFrame, out, &destSize);
assert(destSize == GVILGCodecEncodedFrameSize);
}
void gviLGCodecDecodeAdd(GVSample * out, const GVByte * in, GVDecoderData data)
{
int i;
int destSize;
destSize = GVILGCodecBytesPerFrame;
lgCodecDecode(GVILGCodecHandle, in, GVILGCodecEncodedFrameSize, GVILGCodecDecodeBuffer, &destSize);
assert(destSize == GVILGCodecBytesPerFrame);
for(i = 0 ; i < GVILGCodecSamplesPerFrame ; i++)
out[i] += GVILGCodecDecodeBuffer[i];
GSI_UNUSED(data);
}
void gviLGCodecDecodeSet(GVSample * out, const GVByte * in, GVDecoderData data)
{
int i;
int destSize;
destSize = GVILGCodecBytesPerFrame;
lgCodecDecode(GVILGCodecHandle, in, GVILGCodecEncodedFrameSize, GVILGCodecDecodeBuffer, &destSize);
assert(destSize == GVILGCodecBytesPerFrame);
for(i = 0 ; i < GVILGCodecSamplesPerFrame ; i++)
out[i] = GVILGCodecDecodeBuffer[i];
GSI_UNUSED(data);
}
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