mirror of
https://github.com/RPCS3/soundtouch.git
synced 2024-11-10 04:42:50 +01:00
Added wav file support for 24/32 bit samples, as far as data is read into floating point variables.
This commit is contained in:
oparviai
parent
657d07b5e6
commit
f7ad193e4d
@ -84,29 +84,31 @@ static const char dataStr[] = "data";
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// big-endian CPU, swap bytes in 16 & 32 bit words
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// helper-function to swap byte-order of 32bit integer
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static inline void _swap32(unsigned int &dwData)
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static inline long _swap32(long &dwData)
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{
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dwData = ((dwData >> 24) & 0x000000FF) |
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((dwData >> 8) & 0x0000FF00) |
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((dwData << 8) & 0x00FF0000) |
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((dwData << 24) & 0xFF000000);
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return dwData;
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}
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// helper-function to swap byte-order of 16bit integer
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static inline void _swap16(unsigned short &wData)
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static inline short _swap16(short &wData)
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{
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wData = ((wData >> 8) & 0x00FF) |
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((wData << 8) & 0xFF00);
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return wData;
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}
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// helper-function to swap byte-order of buffer of 16bit integers
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static inline void _swap16Buffer(unsigned short *pData, unsigned int dwNumWords)
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static inline void _swap16Buffer(short *pData, int numWords)
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{
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unsigned long i;
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int i;
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for (i = 0; i < dwNumWords; i ++)
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for (i = 0; i < numWords; i ++)
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{
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_swap16(pData[i]);
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pData[i] = _swap16(pData[i]);
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}
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}
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@ -114,19 +116,21 @@ static const char dataStr[] = "data";
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// little-endian CPU, WAV file is ok as such
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// dummy helper-function
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static inline void _swap32(unsigned int &dwData)
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static inline long _swap32(long &dwData)
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{
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// do nothing
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return dwData;
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}
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// dummy helper-function
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static inline void _swap16(unsigned short &wData)
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static inline short _swap16(short &wData)
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{
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// do nothing
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return wData;
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}
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// dummy helper-function
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static inline void _swap16Buffer(unsigned short *pData, unsigned int dwNumBytes)
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static inline void _swap16Buffer(short *pData, int numBytes)
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{
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// do nothing
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}
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@ -134,6 +138,39 @@ static const char dataStr[] = "data";
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#endif // BIG_ENDIAN
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//////////////////////////////////////////////////////////////////////////////
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//
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// Class WavFileBase
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//
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WavFileBase::WavFileBase()
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{
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convBuff = NULL;
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convBuffSize = 0;
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}
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WavFileBase::~WavFileBase()
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{
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delete[] convBuff;
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convBuffSize = 0;
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}
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/// Get pointer to conversion buffer of at min. given size
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void *WavFileBase::getConvBuffer(int sizeBytes)
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{
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if (convBuffSize < sizeBytes)
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{
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delete[] convBuff;
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convBuffSize = (sizeBytes + 15) & -8;
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convBuff = new char[convBuffSize];
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}
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return convBuff;
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}
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//////////////////////////////////////////////////////////////////////////////
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//
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// Class WavInFile
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@ -188,11 +225,13 @@ void WavInFile::init()
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ST_THROW_RT_ERROR(msg.c_str());
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}
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/* Ignore 'fixed' field value as 32bit signed linear data can have other value than 1.
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if (header.format.fixed != 1)
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{
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string msg = "Input file uses unsupported encoding.";
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ST_THROW_RT_ERROR(msg.c_str());
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}
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*/
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dataRead = 0;
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}
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@ -268,7 +307,7 @@ int WavInFile::read(short *buffer, int maxElems)
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if (header.format.bits_per_sample == 8)
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{
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// 8 bit format
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char *temp = new char[maxElems];
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char *temp = (char*)getConvBuffer(maxElems);
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int i;
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numElems = read(temp, maxElems);
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@ -277,7 +316,6 @@ int WavInFile::read(short *buffer, int maxElems)
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{
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buffer[i] = temp[i] << 8;
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}
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delete[] temp;
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}
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else
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{
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@ -307,33 +345,106 @@ int WavInFile::read(short *buffer, int maxElems)
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numElems = numBytes / 2;
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// 16bit samples, swap byte order if necessary
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_swap16Buffer((unsigned short *)buffer, numElems);
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_swap16Buffer((short *)buffer, numElems);
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}
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return numElems;
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}
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/// Read data in float format. Notice that when reading in float format
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/// 8/16/24/32 bit sample formats are supported
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int WavInFile::read(float *buffer, int maxElems)
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{
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short *temp = new short[maxElems];
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int num;
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int i;
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double fscale;
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unsigned int afterDataRead;
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int numBytes;
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int numElems;
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int bytesPerSample;
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num = read(temp, maxElems);
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assert(buffer);
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fscale = 1.0 / 32768.0;
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// convert to floats, scale to range [-1..+1[
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for (i = 0; i < num; i ++)
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bytesPerSample = header.format.bits_per_sample / 8;
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if ((bytesPerSample < 1) || (bytesPerSample > 4))
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{
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buffer[i] = (float)(fscale * (double)temp[i]);
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stringstream ss;
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ss << "\nOnly 8/16/24/32 bit sample WAV files supported. Can't open WAV file with ";
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ss << (int)header.format.bits_per_sample;
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ss << " bit sample format. ";
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ST_THROW_RT_ERROR(ss.str().c_str());
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}
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delete[] temp;
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numBytes = maxElems * bytesPerSample;
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afterDataRead = dataRead + numBytes;
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if (afterDataRead > header.data.data_len)
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{
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// Don't read more samples than are marked available in header
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numBytes = (int)header.data.data_len - (int)dataRead;
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assert(numBytes >= 0);
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}
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return num;
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// read raw data into temporary buffer
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char *temp = (char*)getConvBuffer(numBytes);
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numBytes = fread(temp, 1, numBytes, fptr);
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dataRead += numBytes;
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numElems = numBytes / bytesPerSample;
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// swap byte ordert & convert to float, depending on sample format
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switch (bytesPerSample)
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{
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case 1:
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{
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char *temp2 = temp;
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double conv = 1.0 / 128;
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for (int i = 0; i < numElems; i ++)
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{
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buffer[i] = (float)(temp2[i] * conv);
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}
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break;
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}
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case 2:
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{
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short *temp2 = (short*)temp;
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double conv = 1.0 / 32768;
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for (int i = 0; i < numElems; i ++)
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{
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short value = temp2[i];
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buffer[i] = (float)(_swap16(value) * conv);
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}
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break;
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}
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case 3:
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{
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char *temp2 = (char *)temp;
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double conv = 1.0 / 8388608;
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for (int i = 0; i < numElems; i ++)
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{
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long value = *((long*)temp2);
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value = _swap32(value) & 0x00ffffff; // take 24 bits
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value |= (value & 0x00800000) ? 0xff000000 : 0; // extend minus sign bits
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buffer[i] = (float)(value * conv);
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temp2 += 3;
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}
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break;
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}
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case 4:
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{
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long *temp2 = (long *)temp;
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double conv = 1.0 / 2147483648;
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assert(sizeof(long) == 4);
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for (int i = 0; i < numElems; i ++)
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{
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long value = temp2[i];
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buffer[i] = (float)(_swap32(value) * conv);
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}
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break;
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}
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}
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return numElems;
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}
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@ -374,7 +485,7 @@ int WavInFile::readRIFFBlock()
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if (fread(&(header.riff), sizeof(WavRiff), 1, fptr) != 1) return -1;
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// swap 32bit data byte order if necessary
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_swap32((unsigned int &)header.riff.package_len);
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_swap32((long &)header.riff.package_len);
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// header.riff.riff_char should equal to 'RIFF');
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if (memcmp(riffStr, header.riff.riff_char, 4) != 0) return -1;
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@ -401,7 +512,7 @@ int WavInFile::readHeaderBlock()
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// Decode blocks according to their label
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if (strcmp(label, fmtStr) == 0)
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{
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int nLen, nDump;
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long nLen, nDump;
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// 'fmt ' block
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memcpy(header.format.fmt, fmtStr, 4);
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@ -409,7 +520,7 @@ int WavInFile::readHeaderBlock()
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// read length of the format field
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if (fread(&nLen, sizeof(int), 1, fptr) != 1) return -1;
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// swap byte order if necessary
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_swap32((unsigned int &)nLen); // int format_len;
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_swap32(nLen); // int format_len;
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header.format.format_len = nLen;
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// calculate how much length differs from expected
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@ -425,12 +536,12 @@ int WavInFile::readHeaderBlock()
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if (fread(&(header.format.fixed), nLen, 1, fptr) != 1) return -1;
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// swap byte order if necessary
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_swap16((unsigned short &)header.format.fixed); // short int fixed;
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_swap16((unsigned short &)header.format.channel_number); // short int channel_number;
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_swap32((unsigned int &)header.format.sample_rate); // int sample_rate;
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_swap32((unsigned int &)header.format.byte_rate); // int byte_rate;
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_swap16((unsigned short &)header.format.byte_per_sample); // short int byte_per_sample;
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_swap16((unsigned short &)header.format.bits_per_sample); // short int bits_per_sample;
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_swap16(header.format.fixed); // short int fixed;
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_swap16(header.format.channel_number); // short int channel_number;
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_swap32((long &)header.format.sample_rate); // int sample_rate;
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_swap32((long &)header.format.byte_rate); // int byte_rate;
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_swap16(header.format.byte_per_sample); // short int byte_per_sample;
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_swap16(header.format.bits_per_sample); // short int bits_per_sample;
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// if format_len is larger than expected, skip the extra data
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if (nDump > 0)
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@ -447,7 +558,7 @@ int WavInFile::readHeaderBlock()
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if (fread(&(header.data.data_len), sizeof(uint), 1, fptr) != 1) return -1;
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// swap byte order if necessary
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_swap32((unsigned int &)header.data.data_len);
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_swap32((long &)header.data.data_len);
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return 1;
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}
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@ -641,15 +752,15 @@ void WavOutFile::writeHeader()
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// swap byte order if necessary
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hdrTemp = header;
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_swap32((unsigned int &)hdrTemp.riff.package_len);
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_swap32((unsigned int &)hdrTemp.format.format_len);
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_swap16((unsigned short &)hdrTemp.format.fixed);
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_swap16((unsigned short &)hdrTemp.format.channel_number);
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_swap32((unsigned int &)hdrTemp.format.sample_rate);
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_swap32((unsigned int &)hdrTemp.format.byte_rate);
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_swap16((unsigned short &)hdrTemp.format.byte_per_sample);
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_swap16((unsigned short &)hdrTemp.format.bits_per_sample);
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_swap32((unsigned int &)hdrTemp.data.data_len);
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_swap32((long &)hdrTemp.riff.package_len);
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_swap32((long &)hdrTemp.format.format_len);
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_swap16((short &)hdrTemp.format.fixed);
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_swap16((short &)hdrTemp.format.channel_number);
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_swap32((long &)hdrTemp.format.sample_rate);
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_swap32((long &)hdrTemp.format.byte_rate);
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_swap16((short &)hdrTemp.format.byte_per_sample);
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_swap16((short &)hdrTemp.format.bits_per_sample);
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_swap32((long &)hdrTemp.data.data_len);
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// write the supplemented header in the beginning of the file
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fseek(fptr, 0, SEEK_SET);
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@ -685,6 +796,7 @@ void WavOutFile::write(const char *buffer, int numElems)
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}
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void WavOutFile::write(const short *buffer, int numElems)
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{
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int res;
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@ -708,7 +820,7 @@ void WavOutFile::write(const short *buffer, int numElems)
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else
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{
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// 16bit format
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unsigned short *pTemp = new unsigned short[numElems];
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short *pTemp = new short[numElems];
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if (header.format.bits_per_sample != 16)
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{
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@ -736,25 +848,87 @@ void WavOutFile::write(const short *buffer, int numElems)
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}
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/// Convert from float to integer and saturate
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inline long saturate(float fvalue, float minval, float maxval)
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{
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if (fvalue > maxval)
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{
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fvalue = maxval;
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}
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else if (fvalue < minval)
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{
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fvalue = minval;
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}
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return (long)fvalue;
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}
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void WavOutFile::write(const float *buffer, int numElems)
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{
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int i;
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short *temp = new short[numElems];
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int iTemp;
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int numBytes;
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int bytesPerSample;
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// convert to 16 bit integer
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for (i = 0; i < numElems; i ++)
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if (numElems == 0) return;
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bytesPerSample = header.format.bits_per_sample / 8;
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numBytes = numElems * bytesPerSample;
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short *temp = (short*)getConvBuffer(numBytes);
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switch (bytesPerSample)
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{
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// convert to integer
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iTemp = (int)(32768.0f * buffer[i]);
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// saturate
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if (iTemp < -32768) iTemp = -32768;
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if (iTemp > 32767) iTemp = 32767;
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temp[i] = (short)iTemp;
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case 1:
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{
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char *temp2 = (char *)temp;
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for (int i = 0; i < numElems; i ++)
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{
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temp2[i] = (char)saturate(buffer[i] * 128.0f, -128.0f, 127.0f);
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}
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break;
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}
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write(temp, numElems);
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delete[] temp;
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case 2:
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{
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short *temp2 = (short *)temp;
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for (int i = 0; i < numElems; i ++)
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{
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short value = (short)saturate(buffer[i] * 32768.0f, -32768.0f, 32767.0f);
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temp2[i] = _swap16(value);
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}
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break;
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}
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case 3:
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{
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char *temp2 = (char *)temp;
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for (int i = 0; i < numElems; i ++)
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{
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long value = saturate(buffer[i] * 8388608.0f, -8388608.0f, 8388607.0f);
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*((long*)temp2) = _swap32(value);
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temp2 += 3;
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}
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break;
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}
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case 4:
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{
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long *temp2 = (long *)temp;
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for (int i = 0; i < numElems; i ++)
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{
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long value = saturate(buffer[i] * 2147483648.0f, -2147483648.0f, 2147483647.0f);
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temp2[i] = _swap32(value);
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}
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break;
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}
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default:
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assert(false);
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}
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int res = fwrite(temp, 1, numBytes, fptr);
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if (res != numBytes)
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{
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ST_THROW_RT_ERROR("Error while writing to a wav file.");
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}
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bytesWritten += numBytes;
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}
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@ -92,8 +92,25 @@ typedef struct
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} WavHeader;
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/// Base class for processing WAV audio files.
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class WavFileBase
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{
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private:
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/// Conversion working buffer;
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void *convBuff;
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int convBuffSize;
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protected:
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WavFileBase();
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virtual ~WavFileBase();
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/// Get pointer to conversion buffer of at min. given size
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void *getConvBuffer(int sizeByte);
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};
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/// Class for reading WAV audio files.
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class WavInFile
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class WavInFile : protected WavFileBase
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{
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private:
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/// File pointer.
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@ -177,6 +194,7 @@ public:
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/// Reads audio samples from the WAV file to floating point format, converting
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/// sample values to range [-1,1[. Reads given number of elements from the file
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/// or if end-of-file reached, as many elements as are left in the file.
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/// Notice that reading in float format supports 8/16/24/32bit sample formats.
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///
|
||||
/// \return Number of elements read from the file.
|
||||
int read(float *buffer, ///< Pointer to buffer where to read data.
|
||||
@ -192,7 +210,7 @@ public:
|
||||
|
||||
|
||||
/// Class for writing WAV audio files.
|
||||
class WavOutFile
|
||||
class WavOutFile : protected WavFileBase
|
||||
{
|
||||
private:
|
||||
/// Pointer to the WAV file
|
||||
|
||||
Loading…
Reference in New Issue
Block a user