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Merge commit '9f3cb3d92e' as 'libraries/ZMusic'

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Rachael Alexanderson 2025-07-30 00:24:15 -04:00
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libraries/ZMusic/source/decoder/sounddecoder.cpp Normal file
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/*
** sounddecoder.cpp
** baseclass for sound format decoders
**
**---------------------------------------------------------------------------
** Copyright 2008-2019 Chris Robinson
** All rights reserved.
**
** Redistribution and use in source and binary forms, with or without
** modification, are permitted provided that the following conditions
** are met:
**
** 1. Redistributions of source code must retain the above copyright
** notice, this list of conditions and the following disclaimer.
** 2. Redistributions in binary form must reproduce the above copyright
** notice, this list of conditions and the following disclaimer in the
** documentation and/or other materials provided with the distribution.
** 3. The name of the author may not be used to endorse or promote products
** derived from this software without specific prior written permission.
**
** THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
** IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
** OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
** IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
** INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
** NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
** THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
**---------------------------------------------------------------------------
**
*/
#include "zmusic/zmusic_internal.h"
#include "sndfile_decoder.h"
#include "mpg123_decoder.h"
SoundDecoder *SoundDecoder::CreateDecoder(MusicIO::FileInterface *reader)
{
SoundDecoder *decoder = NULL;
auto pos = reader->tell();
#ifdef HAVE_SNDFILE
decoder = new SndFileDecoder;
if (decoder->open(reader))
return decoder;
reader->seek(pos, SEEK_SET);
delete decoder;
decoder = NULL;
#endif
#ifdef HAVE_MPG123
decoder = new MPG123Decoder;
if (decoder->open(reader))
return decoder;
reader->seek(pos, SEEK_SET);
delete decoder;
decoder = NULL;
#endif
return decoder;
}
// Default readAll implementation, for decoders that can't do anything better
std::vector<uint8_t> SoundDecoder::readAll()
{
std::vector<uint8_t> output;
unsigned total = 0;
unsigned got;
output.resize(total+32768);
while((got=(unsigned)read((char*)&output[total], output.size()-total)) > 0)
{
total += got;
output.resize(total*2);
}
output.resize(total);
return output;
}
//==========================================================================
//
// other callbacks
//
//==========================================================================
extern "C"
short* dumb_decode_vorbis(int outlen, const void* oggstream, int sizebytes)
{
short* samples = (short*)calloc(1, outlen);
ChannelConfig chans;
SampleType type;
int srate;
// The decoder will take ownership of the reader if it succeeds so this may not be a local variable.
MusicIO::MemoryReader* reader = new MusicIO::MemoryReader((const uint8_t*)oggstream, sizebytes);
SoundDecoder* decoder = SoundDecoder::CreateDecoder(reader);
if (!decoder)
{
reader->close();
return samples;
}
decoder->getInfo(&srate, &chans, &type);
if (chans != ChannelConfig_Mono)
{
delete decoder;
return samples;
}
if(type == SampleType_Int16)
decoder->read((char*)samples, outlen);
else if(type == SampleType_Float32)
{
constexpr size_t tempsize = 1024;
float temp[tempsize];
size_t spos = 0;
outlen /= sizeof(short);
int done = 0;
while(done < outlen)
{
size_t got = decoder->read((char*)temp, tempsize * sizeof(float)) / sizeof(float);
for(size_t i = 0;i < got;++i)
{
float s = temp[i] * 32768.0f;
samples[spos++] = (s > 32767.0f) ? 32767 : (s < -32768.0f) ? -32768 : (short)s;
}
if(got < tempsize)
break;
done += got;
}
}
else if(type == SampleType_UInt8)
{
constexpr size_t tempsize = 1024;
uint8_t temp[tempsize];
size_t spos = 0;
outlen /= sizeof(short);
int done = 0;
while(done < outlen)
{
size_t got = decoder->read((char*)temp, tempsize);
for(size_t i = 0;i < got;++i)
samples[spos++] = (short)((temp[i]-128) * 256);
if(got < tempsize)
break;
done += got;
}
}
delete decoder;
return samples;
}
DLL_EXPORT struct SoundDecoder* CreateDecoder(const uint8_t* data, size_t size, zmusic_bool isstatic)
{
MusicIO::FileInterface* reader;
if (isstatic) reader = new MusicIO::MemoryReader(data, (long)size);
else reader = new MusicIO::VectorReader(data, size);
auto res = SoundDecoder::CreateDecoder(reader);
if (!res) reader->close();
return res;
}
DLL_EXPORT void SoundDecoder_GetInfo(struct SoundDecoder* decoder, int* samplerate, ChannelConfig* chans, SampleType* type)
{
if (decoder) decoder->getInfo(samplerate, chans, type);
else if (samplerate) *samplerate = 0;
}
DLL_EXPORT size_t SoundDecoder_Read(struct SoundDecoder* decoder, void* buffer, size_t length)
{
if (decoder) return decoder->read((char*)buffer, length);
else return 0;
}
DLL_EXPORT void SoundDecoder_Close(struct SoundDecoder* decoder)
{
if (decoder) delete decoder;
}