GTASource/rage/base/tools/audio/audwaveencoder/waveencoder_xenon.cpp

//
// tools/audwaveencoder/waveencoder_xenon.cpp
// 
// Copyright (C) 1999-2005 Rockstar Games.  All Rights Reserved.
//

#include "stdafx.h"

#include "forceinclude/win32_release.h"

#ifdef __XENON
#undef __XENON
#endif // __XENON
#define __XENON 1

#include "libresample.h"
#include "math.h"
#include "stdio.h"

#pragma warning(push)
#pragma warning(disable: 4201)//Nonstandard extension used : nameless struct/union
#pragma warning(disable: 4668)//#if condition not defined
#pragma comment(lib, "XMAClean.lib")
#pragma comment(lib, "Ws2_32.lib")//don't ask
//#define __servprov_h__
#include "waveencoder_xenon.h"

static const unsigned int g_XmaBlockSamples = 128;

#include "xmaencoder.h"
#include "xmaclean.h"

//FILE _iob[];
//FILE *_iob = __iob_func();
extern "C" {
FILE _iob[3] = {__iob_func()[0], __iob_func()[1], __iob_func()[2]};
}



namespace audWaveEncoding {

bool audWaveEncoderXenon::Encode(audWaveMetadataBaseWrapper *waveMetadataInWrapped, unsigned int waveSampleDataOffsetBytes,
	void **waveMetadataOut, unsigned int &waveMetadataOutLengthBytes, void **waveSampleDataOut,
	unsigned int &waveSampleDataOutLengthBytes, int compression, int &preloopPadding, unsigned int &/*outBitsInLastPacket*/)
{
	XMAENCODERSTREAM stream = {0};
	WAVEFORMATEXTENSIBLE waveFormat = {0};
	DWORD encodeFlags = 0;
	audWaveMetadataBase *waveMetadataIn = waveMetadataInWrapped->GetMetadata();

	if(waveMetadataIn->loopStartOffsetSamples >= 0)
	{
		//Align pre-loop and loop lengths via resampling and zero-padding.
		if(!AlignLoop(waveMetadataIn, g_XmaBlockSamples, preloopPadding))
		{
			return false;
		}

		stream.LoopStart = waveMetadataIn->loopStartOffsetSamples ;
		stream.LoopLength = waveMetadataIn->lengthSamples - (waveMetadataIn->loopStartOffsetSamples);
		encodeFlags = XMAENCODER_LOOP;
	}

	//Setup convoluted input data structures.
	waveFormat.Format.wFormatTag = WAVE_FORMAT_PCM;
	waveFormat.Format.nChannels = 1;
	waveFormat.Format.nSamplesPerSec = waveMetadataIn->sampleRate;
	waveFormat.Format.nBlockAlign = 2;
	waveFormat.Format.nAvgBytesPerSec = waveFormat.Format.nBlockAlign * waveFormat.Format.nSamplesPerSec;
	waveFormat.Format.wBitsPerSample = 16;

	stream.Format = waveFormat;
	stream.pBuffer = waveMetadataIn->waveData;
	stream.BufferSize = waveMetadataIn->lengthBytes;

	VOID *encodedData = NULL;
	DWORD numEncodedDataBytes;
	XMAWAVEFORMAT *encodedDataFormat = NULL;
	DWORD numEncodedDataFormatBytes;
	DWORD *seekTable = NULL;
	DWORD numSeekTableBytes;

	//Perform XMA encode using static library.
	if(FAILED(XMAInMemoryEncoder(1, &stream, compression, encodeFlags, &encodedData, &numEncodedDataBytes,
		&encodedDataFormat, &numEncodedDataFormatBytes, &seekTable, &numSeekTableBytes)))
	{
		return false;
	}

	/*try DWORD LastBitsInLastPacket=0;
	DWORD CountOfBits=0;
	CXMAClean x;
	HRESULT result = S_OK;

	
	{
	result = x.CleanStream(false, false, (BYTE*)encodedData,numEncodedDataBytes,&LastBitsInLastPacket, &CountOfBits);
	}
	catch(...)
	{
		System::Diagnostics::EventLog *entryLog = new System::Diagnostics::EventLog();
		entryLog->WriteEntry(S"CleanStream Failed");
	}

	outBitsInLastPacket = (unsigned int)LastBitsInLastPacket;*/

	audWaveMetadata encodedWaveMetadata;

	//Convert metadata to platform endianness.
	unsigned __int64 waveDataOffsetBytes = (unsigned __int64)waveSampleDataOffsetBytes;
	encodedWaveMetadata.base.waveDataOffsetBytes = FlipEndian(waveDataOffsetBytes);
	encodedWaveMetadata.base.lengthBytes = FlipEndian((unsigned int)numEncodedDataBytes);
	encodedWaveMetadata.base.lengthSamples = FlipEndian(waveMetadataIn->lengthSamples);
	encodedWaveMetadata.base.loopStartOffsetSamples = (int)FlipEndian((unsigned int)waveMetadataIn->
		loopStartOffsetSamples);
	encodedWaveMetadata.base.sampleRate = FlipEndian(waveMetadataIn->sampleRate);
	encodedWaveMetadata.base.headroom = (short)FlipEndian((unsigned short)waveMetadataIn->headroom);
	encodedWaveMetadata.base.flags = 0;

	encodedWaveMetadata.platform.loopStartBits = FlipEndian((unsigned int)encodedDataFormat->XmaStreams[0].LoopStart);
	encodedWaveMetadata.platform.loopEndBits = FlipEndian((unsigned int)encodedDataFormat->XmaStreams[0].LoopEnd);
	encodedWaveMetadata.platform.loopSubframeData = encodedDataFormat->XmaStreams[0].SubframeData;
	encodedWaveMetadata.platform.loopSubframeData = FlipEndian(encodedWaveMetadata.platform.loopSubframeData);
	free(encodedDataFormat);

	//Skip the first 8 bytes of the seek table - which appear to be header...
	DWORD *trimmedSeekTable = seekTable + 2;
	numSeekTableBytes -= 8;
	//Convert seek table to platform endianness (as the XMA encoder doesn't.)
	for(unsigned int i=0; i<numSeekTableBytes / sizeof(DWORD); i++)
	{
		trimmedSeekTable[i] = FlipEndian((unsigned int)trimmedSeekTable[i]);
	}

	unsigned __int64 seekTableOffsetBytes = (unsigned __int64)sizeof(audWaveMetadata);
	encodedWaveMetadata.platform.seekTableOffsetBytes = FlipEndian(seekTableOffsetBytes);
	encodedWaveMetadata.platform.seekTableLengthSamples = FlipEndian((unsigned int)(numSeekTableBytes / sizeof(DWORD)));

	//Allocate output buffers and copy data.

	waveSampleDataOutLengthBytes = numEncodedDataBytes;
	*waveSampleDataOut = new unsigned char[waveSampleDataOutLengthBytes];
	memcpy(*waveSampleDataOut, encodedData, waveSampleDataOutLengthBytes);
	free(encodedData);

	waveMetadataOutLengthBytes = sizeof(audWaveMetadata) + numSeekTableBytes;
	*waveMetadataOut = new unsigned char[waveMetadataOutLengthBytes];
	memcpy(*waveMetadataOut, &encodedWaveMetadata, sizeof(audWaveMetadata));
	memcpy(((char *)(*waveMetadataOut)) + sizeof(audWaveMetadata), trimmedSeekTable, numSeekTableBytes);
	free(seekTable);
	


	return true;
}

} // namespace audWaveEncoding

#pragma warning(pop)	//Reenable the warnings