mirror of
https://github.com/ptitSeb/Serious-Engine
synced 2024-11-22 18:30:27 +01:00
333 lines
8.9 KiB
C++
333 lines
8.9 KiB
C++
/* Copyright (c) 2002-2012 Croteam Ltd. All rights reserved. */
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#include "stdh.h"
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#include <Engine/Base/Stream.h>
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#include <Engine/Base/ErrorReporting.h>
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#include <Engine/Sound/Wave.h>
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/* ====================================================
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*
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* CONVERSION FUNCTIONS
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*
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*/
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// check wave format
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void PCMWaveInput::CheckWaveFormat_t(WAVEFORMATEX wfeCheck, char *pcErrorString)
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{
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// check format tag
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if (wfeCheck.wFormatTag != 1) {
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ThrowF_t(TRANS("%s: Invalid format tag, not a PCM Wave file!"), pcErrorString);
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}
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// check bits per sample
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if (wfeCheck.wBitsPerSample != 8 &&
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wfeCheck.wBitsPerSample != 16) {
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ThrowF_t(TRANS("%s: Unknown Bits Per Sample value!"), pcErrorString);
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}
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// check number of channels
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if (wfeCheck.nChannels != 1 &&
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wfeCheck.nChannels != 2) {
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ThrowF_t(TRANS("%s: Invalid number of channels!"), pcErrorString);
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}
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//ASSERT( wfeCheck.wBitsPerSample==16);
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}
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// Get next data
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inline ULONG PCMWaveInput::GetData_t(CTStream *pCstrInput)
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{
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ASSERT(pwi_bInfoLoaded);
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// read data according to bits per sample value
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if (pwi_wfeWave.wBitsPerSample==8) {
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// read UBYTE
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UBYTE ubData;
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*pCstrInput >> ubData;
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return ((ULONG)ubData) <<16; // (shift) prepare data for shrink/expand operation
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} else {
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// read UWORD
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SWORD swData;
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*pCstrInput >> swData;
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return ((ULONG)(swData+0x8000)) <<8; // (shift) prepare data for shrink/expand operation
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}
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}
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// Store data
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inline void PCMWaveInput::StoreData(ULONG ulData)
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{
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ASSERT( pwi_wfeDesired.wBitsPerSample==16);
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*pwi_pswMemory++ = ((SWORD)(ulData>>8) -0x8000); // (shift) restore data format
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}
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/*
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* Copy data
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*/
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void PCMWaveInput::CopyData_t(CTStream *pCstrInput)
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{
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// for all input data (mono and stereo)
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ULONG ulDataCount = GetDataLength() * pwi_wfeWave.nChannels;
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while (ulDataCount > 0) {
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StoreData(GetData_t(pCstrInput)); // read and store data from input (hidden BitsPerSample conversion!)
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ulDataCount--; // to next data
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}
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}
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/*
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* Shrink data
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*/
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// Shrink data
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void PCMWaveInput::ShrinkData_t(CTStream *pCstrInput)
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{
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ASSERT(pwi_dRatio>1.0);
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// *** MONO ***
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if (pwi_wfeWave.nChannels == 1) {
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DOUBLE dInterData, dTempData, dRatio;
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ULONG ulDataCount;
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// data intermediate value
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dInterData = 0.0;
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// for all input data (mono)
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ulDataCount = GetDataLength();
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dRatio = pwi_dRatio;
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while (ulDataCount > 0) {
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// read part of data (<100%)
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if (dRatio<1.0) {
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dTempData = GetData_t(pCstrInput);
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dInterData += dTempData*dRatio;
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StoreData(ULONG(dInterData/pwi_dRatio));
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// new intermediate value
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dRatio = 1 - dRatio;
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dInterData = dTempData*dRatio;
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dRatio = pwi_dRatio - dRatio;
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// read complete data (100%)
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} else {
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dInterData += GetData_t(pCstrInput);
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dRatio -= 1.0;
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}
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ulDataCount--; // to next data
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}
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StoreData(ULONG(dInterData/(pwi_dRatio-dRatio)));
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// *** STEREO ***
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} else if (pwi_wfeWave.nChannels == 2) {
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DOUBLE dLInterData, dRInterData, dLTempData, dRTempData, dRatio;
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ULONG ulDataCount;
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// data intermediate value
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dLInterData = 0.0;
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dRInterData = 0.0;
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// for all input data (mono)
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ulDataCount = GetDataLength();
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dRatio = pwi_dRatio;
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while (ulDataCount > 0) {
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// read part of data (<100%)
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if (dRatio<1.0) {
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dLTempData = GetData_t(pCstrInput);
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dRTempData = GetData_t(pCstrInput);
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dLInterData += dLTempData*dRatio;
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dRInterData += dRTempData*dRatio;
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StoreData(ULONG(dLInterData/pwi_dRatio));
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StoreData(ULONG(dRInterData/pwi_dRatio));
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// new intermediate value
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dRatio = 1 - dRatio;
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dLInterData = dLTempData*dRatio;
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dRInterData = dRTempData*dRatio;
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dRatio = pwi_dRatio - dRatio;
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// read complete data (100%)
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} else {
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dLInterData += GetData_t(pCstrInput);
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dRInterData += GetData_t(pCstrInput);
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dRatio -= 1.0;
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}
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ulDataCount--; // to next data
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}
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StoreData(ULONG(dLInterData/(pwi_dRatio-dRatio)));
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StoreData(ULONG(dRInterData/(pwi_dRatio-dRatio)));
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}
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}
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/* ====================================================
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*
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* WAVE FUNCTIONS
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*
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*/
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/*
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* Load Wave info
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*/
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WAVEFORMATEX PCMWaveInput::LoadInfo_t(CTStream *pCstrInput)
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{
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// if already loaded -> exception
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if (pwi_bInfoLoaded) {
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throw (TRANS("PCM Wave Input: Info already loaded."));
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}
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/* Read Riff */
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pCstrInput->ExpectID_t(CChunkID("RIFF")); // ID "RIFF"
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(*pCstrInput) >> pwi_ulRiffLength; // Ucitaj duljinu file-a
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/* Read Wave */
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pCstrInput->ExpectID_t(CChunkID("WAVE")); // ID "WAVE"
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pCstrInput->ExpectID_t(CChunkID("fmt ")); // ID "fmt "
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// read Format Chunk length
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SLONG slFmtLength;
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(*pCstrInput) >> slFmtLength;
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// read WAVE format
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(*pCstrInput) >> pwi_wfeWave.wFormatTag;
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(*pCstrInput) >> pwi_wfeWave.nChannels;
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(*pCstrInput) >> pwi_wfeWave.nSamplesPerSec;
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(*pCstrInput) >> pwi_wfeWave.nAvgBytesPerSec;
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(*pCstrInput) >> pwi_wfeWave.nBlockAlign;
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(*pCstrInput) >> pwi_wfeWave.wBitsPerSample;
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pwi_wfeWave.cbSize = 0; // Only for PCM Wave !!!
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// WARNING !!! - Only for PCM Wave - Skip extra information if exists
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if( slFmtLength > 16) {
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//WarningMessage("PCM Wave Input: Wave format Extra information skipped!");
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pCstrInput->Seek_t(slFmtLength - 16, CTStream::SD_CUR);
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}
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// WARNING - If exist Fact chunk skip it (purpose unknown)
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if( pCstrInput->GetID_t() == CChunkID("fact")) {
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//WarningMessage("PCM Wave Input: Fact Chunk skipped!");
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SLONG slSkipLength;
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(*pCstrInput) >> slSkipLength;
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pCstrInput->Seek_t(slSkipLength, CTStream::SD_CUR);
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// seek back on Chunk ID
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} else {
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pCstrInput->Seek_t(-CID_LENGTH, CTStream::SD_CUR);
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}
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/* Read Data */
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pCstrInput->ExpectID_t(CChunkID("data")); // ID "data"
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// read Data length (in bytes)
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(*pCstrInput) >> pwi_ulDataLength;
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/* Check PCM format */
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CheckWaveFormat_t(pwi_wfeWave, "PCM Wave Input (input)");
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// mark Info loaded
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pwi_bInfoLoaded = TRUE;
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// ASSERT( pwi_wfeWave.wBitsPerSample==16);
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// return Wave Format
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return pwi_wfeWave;
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}
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/*
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* Load and convert Wave data
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*/
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void PCMWaveInput::LoadData_t(CTStream *pCstrInput, SWORD *pswMemory, WAVEFORMATEX &SwfeDesired)
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{
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// if info not loaded -> exception
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if (!pwi_bInfoLoaded) {
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throw (TRANS("PCM Wave Input: Info not loaded."));
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}
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// if already loaded -> exception
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if (pwi_bDataLoaded) {
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throw (TRANS("PCM Wave Input: Data already loaded"));
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}
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// set memory pointer
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pwi_pswMemory = pswMemory;
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// store and check desired sound format
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CheckWaveFormat_t(SwfeDesired, "PCM Wave Input (desired)");
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pwi_wfeDesired = SwfeDesired;
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// calculate expand/shrink ratio (number of channels remain the same)
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pwi_dRatio = (DOUBLE)pwi_wfeDesired.nSamplesPerSec / (DOUBLE)pwi_wfeWave.nSamplesPerSec;
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// determine converion type from input and desired sound frequency, and convert sound
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if (pwi_dRatio < 1) {
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pwi_dRatio = 1/pwi_dRatio;
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ShrinkData_t(pCstrInput);
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} else if (pwi_dRatio > 1) {
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ASSERTALWAYS("Can't expand wave data");
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memset(pwi_pswMemory, 0, DetermineBufferSize(pwi_wfeDesired));
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// copy data
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} else {
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ASSERT(pwi_dRatio==1.0f);
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CopyData_t(pCstrInput);
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}
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// data is loaded (and maybe converted from 16-bits)
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if( pwi_wfeWave.wBitsPerSample==8) SwfeDesired.nBlockAlign *= 2;
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pwi_bDataLoaded = TRUE;
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}
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/*
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* Length in bytes
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*/
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ULONG PCMWaveInput::GetByteLength(void)
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{
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ASSERT(pwi_bInfoLoaded);
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return pwi_ulDataLength;
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}
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/*
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* Length in blocks
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*/
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ULONG PCMWaveInput::GetDataLength(void)
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{
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ASSERT(pwi_bInfoLoaded);
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return GetByteLength() / (pwi_wfeWave.nChannels * pwi_wfeWave.wBitsPerSample/8);
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}
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ULONG PCMWaveInput::GetDataLength(WAVEFORMATEX SwfeDesired)
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{
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ASSERT(pwi_bInfoLoaded);
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// return buffer size
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return DetermineBufferSize(SwfeDesired) / (SwfeDesired.nChannels * SwfeDesired.wBitsPerSample/8);
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}
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/*
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* Length in seconds
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*/
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DOUBLE PCMWaveInput::GetSecondsLength(void)
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{
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ASSERT(pwi_bInfoLoaded);
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return (DOUBLE)GetDataLength() / (DOUBLE)pwi_wfeWave.nSamplesPerSec;
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}
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/*
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* Buffer length in bytes
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*/
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ULONG PCMWaveInput::DetermineBufferSize(void)
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{
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return DetermineBufferSize(pwi_wfeWave);
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}
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ULONG PCMWaveInput::DetermineBufferSize( WAVEFORMATEX SwfeDesired)
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{
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ASSERT(pwi_bInfoLoaded);
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DOUBLE dRatio;
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// calculate ratio between formats
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dRatio = (DOUBLE)SwfeDesired.nSamplesPerSec / (DOUBLE)pwi_wfeWave.nSamplesPerSec
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* (DOUBLE)SwfeDesired.wBitsPerSample / (DOUBLE)pwi_wfeWave.wBitsPerSample;
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// return buffer size (must calculate with data length to avoid miss align data, for example:
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// 16 bit sound with 2 channels must be aligned to 4 bytes boundary and a multiply with
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// random ratio can as result give any possible number
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DOUBLE ret = ceil(dRatio*GetDataLength()) * (pwi_wfeWave.nChannels*(pwi_wfeWave.wBitsPerSample/8));
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return (ULONG)ret;
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}
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