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Squashed 'libraries/ZMusic/' content from commit ac3e232b00

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git-subtree-dir: libraries/ZMusic
git-subtree-split: ac3e232b001129c740b7b65196ae0e1b13b82513
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Rachael Alexanderson 2025-07-30 00:24:15 -04:00
commit 9f3cb3d92e
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/*
** mpg123_decoder.cpp
**
**---------------------------------------------------------------------------
** Copyright 2008-2010 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 <algorithm>
#include <stdio.h>
#include "mpg123_decoder.h"
#include "loader/i_module.h"
#ifdef HAVE_MPG123
FModule MPG123Module{"MPG123"};
#include "mpgload.h"
#ifdef _WIN32
#define MPG123LIB "libmpg123-0.dll"
#elif defined(__APPLE__)
#define MPG123LIB "libmpg123.0.dylib"
#else
#define MPG123LIB "libmpg123.so.0"
#endif
bool IsMPG123Present()
{
#if !defined DYN_MPG123
return true;
#else
static bool cached_result = false;
static bool done = false;
if (!done)
{
done = true;
auto abspath = FModule_GetProgDir() + "/" MPG123LIB;
cached_result = MPG123Module.Load({abspath.c_str(), MPG123LIB});
}
return cached_result;
#endif
}
static bool inited = false;
off_t MPG123Decoder::file_lseek(void *handle, off_t offset, int whence)
{
auto &reader = reinterpret_cast<MPG123Decoder*>(handle)->Reader;
if(whence == SEEK_CUR)
{
if(offset < 0 && reader->tell()+offset < 0)
return -1;
}
else if(whence == SEEK_END)
{
if(offset < 0 && reader->filelength() + offset < 0)
return -1;
}
if(reader->seek(offset, whence) != 0)
return -1;
return (off_t)reader->tell();
}
ssize_t MPG123Decoder::file_read(void *handle, void *buffer, size_t bytes)
{
auto &reader = reinterpret_cast<MPG123Decoder*>(handle)->Reader;
return (ssize_t)reader->read(buffer, (long)bytes);
}
MPG123Decoder::~MPG123Decoder()
{
if(MPG123)
{
mpg123_close(MPG123);
mpg123_delete(MPG123);
MPG123 = 0;
}
if (Reader) Reader->close();
Reader = nullptr;
}
bool MPG123Decoder::open(MusicIO::FileInterface *reader)
{
if(!inited)
{
if (!IsMPG123Present()) return false;
if(mpg123_init() != MPG123_OK) return false;
inited = true;
}
Reader = reader;
{
MPG123 = mpg123_new(NULL, NULL);
if(mpg123_replace_reader_handle(MPG123, file_read, file_lseek, NULL) == MPG123_OK &&
mpg123_open_handle(MPG123, this) == MPG123_OK)
{
int enc, channels;
long srate;
if(mpg123_getformat(MPG123, &srate, &channels, &enc) == MPG123_OK)
{
if((channels == 1 || channels == 2) && srate > 0 &&
mpg123_format_none(MPG123) == MPG123_OK &&
mpg123_format(MPG123, srate, channels, MPG123_ENC_SIGNED_16) == MPG123_OK)
{
// All OK
Done = false;
return true;
}
}
mpg123_close(MPG123);
}
mpg123_delete(MPG123);
MPG123 = 0;
}
Reader = nullptr; // need to give it back.
return false;
}
void MPG123Decoder::getInfo(int *samplerate, ChannelConfig *chans, SampleType *type)
{
int enc = 0, channels = 0;
long srate = 0;
mpg123_getformat(MPG123, &srate, &channels, &enc);
*samplerate = srate;
if(channels == 2)
*chans = ChannelConfig_Stereo;
else
*chans = ChannelConfig_Mono;
*type = SampleType_Int16;
}
size_t MPG123Decoder::read(char *buffer, size_t bytes)
{
size_t amt = 0;
while(!Done && bytes > 0)
{
size_t got = 0;
int ret = mpg123_read(MPG123, (unsigned char*)buffer, bytes, &got);
bytes -= got;
buffer += got;
amt += got;
if(ret == MPG123_NEW_FORMAT || ret == MPG123_DONE || got == 0)
{
Done = true;
break;
}
}
return amt;
}
bool MPG123Decoder::seek(size_t ms_offset, bool ms, bool mayrestart)
{
int enc, channels;
long srate;
if (!mayrestart || ms_offset > 0)
{
if (mpg123_getformat(MPG123, &srate, &channels, &enc) == MPG123_OK)
{
size_t smp_offset = ms ? (size_t)((double)ms_offset / 1000. * srate) : ms_offset;
if (mpg123_seek(MPG123, (off_t)smp_offset, SEEK_SET) >= 0)
{
Done = false;
return true;
}
}
return false;
}
else
{
// Restart the song instead of rewinding. A rewind seems to cause distortion when done repeatedly.
// offset is intentionally ignored here.
if (MPG123)
{
mpg123_close(MPG123);
mpg123_delete(MPG123);
MPG123 = 0;
}
Reader->seek(0, SEEK_SET);
// Do not call open with our own reader variable, that would be catastrophic.
auto reader = std::move(Reader);
return open(reader);
}
}
size_t MPG123Decoder::getSampleOffset()
{
return mpg123_tell(MPG123);
}
size_t MPG123Decoder::getSampleLength()
{
off_t len = mpg123_length(MPG123);
return (len > 0) ? len : 0;
}
#endif

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#ifndef MPG123_DECODER_H
#define MPG123_DECODER_H
#include "zmusic/sounddecoder.h"
#ifdef HAVE_MPG123
#ifdef _MSC_VER
#include <stddef.h>
typedef ptrdiff_t ssize_t;
#endif
#ifndef DYN_MPG123
#include "mpg123.h"
#else
#include "../thirdparty/mpg123.h"
#endif
struct MPG123Decoder : public SoundDecoder
{
virtual void getInfo(int* samplerate, ChannelConfig* chans, SampleType* type) override;
virtual size_t read(char* buffer, size_t bytes) override;
virtual bool seek(size_t ms_offset, bool ms, bool mayrestart) override;
virtual size_t getSampleOffset() override;
virtual size_t getSampleLength() override;
// Make non-copyable
MPG123Decoder() = default;
MPG123Decoder(const MPG123Decoder& rhs) = delete;
MPG123Decoder& operator=(const MPG123Decoder& rhs) = delete;
virtual ~MPG123Decoder();
protected:
virtual bool open(MusicIO::FileInterface *reader) override;
private:
mpg123_handle *MPG123 = nullptr;
bool Done = false;
MusicIO::FileInterface* Reader = nullptr;
static off_t file_lseek(void *handle, off_t offset, int whence);
static ssize_t file_read(void *handle, void *buffer, size_t bytes);
};
#endif
#endif /* MPG123_DECODER_H */

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#ifndef MPGDEF_H
#define MPGDEF_H
#if defined HAVE_MPG123 && defined DYN_MPG123
#define DEFINE_ENTRY(type, name) static TReqProc<MPG123Module, type> p_##name{#name};
DEFINE_ENTRY(int (*)(mpg123_handle *mh), mpg123_close)
DEFINE_ENTRY(void (*)(mpg123_handle *mh), mpg123_delete)
DEFINE_ENTRY(int (*)(void), mpg123_init)
DEFINE_ENTRY(mpg123_handle* (*)(const char* decoder, int *error), mpg123_new)
DEFINE_ENTRY(int (*)(mpg123_handle *mh, ssize_t (*r_read) (void *, void *, size_t), off_t (*r_lseek)(void *, off_t, int), void (*cleanup)(void*)), mpg123_replace_reader_handle)
DEFINE_ENTRY(int (*)(mpg123_handle *mh, void *iohandle), mpg123_open_handle)
DEFINE_ENTRY(int (*)(mpg123_handle *mh, long *rate, int *channels, int *encoding), mpg123_getformat)
DEFINE_ENTRY(int (*)(mpg123_handle *mh), mpg123_format_none)
DEFINE_ENTRY(int (*)(mpg123_handle *mh, unsigned char *outmemory, size_t outmemsize, size_t *done), mpg123_read)
DEFINE_ENTRY(off_t (*)(mpg123_handle *mh, off_t sampleoff, int whence), mpg123_seek)
DEFINE_ENTRY(int (*)(mpg123_handle *mh, long rate, int channels, int encodings), mpg123_format)
DEFINE_ENTRY(off_t (*)(mpg123_handle *mh), mpg123_tell)
DEFINE_ENTRY(off_t (*)(mpg123_handle *mh), mpg123_length)
#undef DEFINE_ENTRY
#ifndef IN_IDE_PARSER
#define mpg123_close p_mpg123_close
#define mpg123_delete p_mpg123_delete
#define mpg123_init p_mpg123_init
#define mpg123_new p_mpg123_new
#define mpg123_replace_reader_handle p_mpg123_replace_reader_handle
#define mpg123_open_handle p_mpg123_open_handle
#define mpg123_getformat p_mpg123_getformat
#define mpg123_format_none p_mpg123_format_none
#define mpg123_read p_mpg123_read
#define mpg123_seek p_mpg123_seek
#define mpg123_tell p_mpg123_tell
#define mpg123_format p_mpg123_format
#define mpg123_length p_mpg123_length
#endif
#endif
#endif

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/*
** sndfile_decoder.cpp
**
**---------------------------------------------------------------------------
** Copyright 2008-2010 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 <algorithm>
#include "sndfile_decoder.h"
#include "loader/i_module.h"
#ifdef HAVE_SNDFILE
FModule SndFileModule{"SndFile"};
#include "sndload.h"
#ifdef _WIN32
static const char* libnames[] = { "sndfile.dll", "libsndfile-1.dll" };
#elif defined(__APPLE__)
static const char* libnames[] = { "libsndfile.1.dylib" };
#else
static const char* libnames[] = { "libsndfile.so.1" };
#endif
extern "C" int IsSndFilePresent()
{
#if !defined DYN_SNDFILE
return true;
#else
static bool cached_result = false;
static bool done = false;
if (!done)
{
done = true;
for (auto libname : libnames)
{
auto abspath = FModule_GetProgDir() + "/" + libname;
cached_result = SndFileModule.Load({ abspath.c_str(), libname });
if (cached_result) break;
}
}
return cached_result;
#endif
}
sf_count_t SndFileDecoder::file_get_filelen(void *user_data)
{
auto &reader = reinterpret_cast<SndFileDecoder*>(user_data)->Reader;
return reader->filelength();
}
sf_count_t SndFileDecoder::file_seek(sf_count_t offset, int whence, void *user_data)
{
auto &reader = reinterpret_cast<SndFileDecoder*>(user_data)->Reader;
if(reader->seek((long)offset, whence) != 0)
return -1;
return reader->tell();
}
sf_count_t SndFileDecoder::file_read(void *ptr, sf_count_t count, void *user_data)
{
auto &reader = reinterpret_cast<SndFileDecoder*>(user_data)->Reader;
return reader->read(ptr, (long)count);
}
sf_count_t SndFileDecoder::file_write(const void *ptr, sf_count_t count, void *user_data)
{
return -1;
}
sf_count_t SndFileDecoder::file_tell(void *user_data)
{
auto &reader = reinterpret_cast<SndFileDecoder*>(user_data)->Reader;
return reader->tell();
}
SndFileDecoder::~SndFileDecoder()
{
if(SndFile)
sf_close(SndFile);
SndFile = 0;
if (Reader) Reader->close();
Reader = nullptr;
}
bool SndFileDecoder::open(MusicIO::FileInterface *reader)
{
if (!IsSndFilePresent()) return false;
SF_VIRTUAL_IO sfio = { file_get_filelen, file_seek, file_read, file_write, file_tell };
Reader = reader;
SndInfo.format = 0;
SndFile = sf_open_virtual(&sfio, SFM_READ, &SndInfo, this);
if (SndFile)
{
if (SndInfo.channels == 1 || SndInfo.channels == 2)
return true;
sf_close(SndFile);
SndFile = 0;
}
Reader = nullptr; // need to give it back.
return false;
}
void SndFileDecoder::getInfo(int *samplerate, ChannelConfig *chans, SampleType *type)
{
*samplerate = SndInfo.samplerate;
if(SndInfo.channels == 2)
*chans = ChannelConfig_Stereo;
else
*chans = ChannelConfig_Mono;
*type = SampleType_Int16;
}
size_t SndFileDecoder::read(char *buffer, size_t bytes)
{
short *out = (short*)buffer;
size_t frames = bytes / SndInfo.channels / 2;
size_t total = 0;
// It seems libsndfile has a bug with converting float samples from Vorbis
// to the 16-bit shorts we use, which causes some PCM samples to overflow
// and wrap, creating static. So instead, read the samples as floats and
// convert to short ourselves.
// Use a loop to convert a handful of samples at a time, avoiding a heap
// allocation for temporary storage. 64 at a time works, though maybe it
// could be more.
while(total < frames)
{
size_t todo = std::min<size_t>(frames-total, 64/SndInfo.channels);
float tmp[64];
size_t got = (size_t)sf_readf_float(SndFile, tmp, todo);
if(got < todo) frames = total + got;
for(size_t i = 0;i < got*SndInfo.channels;i++)
*out++ = (short)std::max(std::min(tmp[i] * 32767.f, 32767.f), -32768.f);
total += got;
}
return total * SndInfo.channels * 2;
}
std::vector<uint8_t> SndFileDecoder::readAll()
{
if(SndInfo.frames <= 0)
return SoundDecoder::readAll();
int framesize = 2 * SndInfo.channels;
std::vector<uint8_t> output;
output.resize((unsigned)(SndInfo.frames * framesize));
size_t got = read((char*)&output[0], output.size());
output.resize((unsigned)got);
return output;
}
bool SndFileDecoder::seek(size_t ms_offset, bool ms, bool /*mayrestart*/)
{
size_t smp_offset = ms? (size_t)((double)ms_offset / 1000. * SndInfo.samplerate) : ms_offset;
if(sf_seek(SndFile, smp_offset, SEEK_SET) < 0)
return false;
return true;
}
size_t SndFileDecoder::getSampleOffset()
{
return (size_t)sf_seek(SndFile, 0, SEEK_CUR);
}
size_t SndFileDecoder::getSampleLength()
{
return (size_t)((SndInfo.frames > 0) ? SndInfo.frames : 0);
}
// band-aid for FluidSynth, which is C, not C++ and cannot use the module interface.
#ifdef DYN_SNDFILE
#undef sf_open_virtual
extern "C" SNDFILE * sf_open_virtual(SF_VIRTUAL_IO * sfvirtual, int mode, SF_INFO * sfinfo, void* user_data)
{
return p_sf_open_virtual(sfvirtual, mode, sfinfo, user_data);
}
extern "C" const char* sf_strerror(SNDFILE * sndfile)
{
return p_sf_strerror(sndfile);
}
extern "C" sf_count_t sf_readf_short(SNDFILE * sndfile, short* ptr, sf_count_t frames)
{
return p_sf_readf_short(sndfile, ptr, frames);
}
#undef sf_close
extern "C" int sf_close(SNDFILE * sndfile)
{
return p_sf_close(sndfile);
}
#endif
#else // in case someone decided to build without sndfile support
extern "C" int IsSndFilePresent()
{
return false;
}
extern "C" SNDFILE * sf_open_virtual(SF_VIRTUAL_IO * sfvirtual, int mode, SF_INFO * sfinfo, void* user_data)
{
return nullptr;
}
extern "C" const char* sf_strerror(SNDFILE * sndfile)
{
return "no sndfile support";
}
extern "C" sf_count_t sf_readf_short(SNDFILE * sndfile, short* ptr, sf_count_t frames)
{
return 0;
}
extern "C" int sf_close(SNDFILE * sndfile)
{
return 0;
}
#endif

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#ifndef SNDFILE_DECODER_H
#define SNDFILE_DECODER_H
#include "zmusic/sounddecoder.h"
#ifdef HAVE_SNDFILE
#ifndef DYN_SNDFILE
#include "sndfile.h"
#else
#include "../thirdparty/sndfile.h"
#endif
struct SndFileDecoder : public SoundDecoder
{
virtual void getInfo(int *samplerate, ChannelConfig *chans, SampleType *type) override;
virtual size_t read(char *buffer, size_t bytes) override;
virtual std::vector<uint8_t> readAll() override;
virtual bool seek(size_t ms_offset, bool ms, bool mayrestart) override;
virtual size_t getSampleOffset() override;
virtual size_t getSampleLength() override;
SndFileDecoder() = default;
// Make non-copyable
SndFileDecoder(const SndFileDecoder& rhs) = delete;
SndFileDecoder& operator=(const SndFileDecoder& rhs) = delete;
virtual ~SndFileDecoder();
protected:
virtual bool open(MusicIO::FileInterface *reader) override;
private:
SNDFILE *SndFile = nullptr;
SF_INFO SndInfo;
MusicIO::FileInterface* Reader = nullptr;
static sf_count_t file_get_filelen(void *user_data);
static sf_count_t file_seek(sf_count_t offset, int whence, void *user_data);
static sf_count_t file_read(void *ptr, sf_count_t count, void *user_data);
static sf_count_t file_write(const void *ptr, sf_count_t count, void *user_data);
static sf_count_t file_tell(void *user_data);
};
#else
#include "../thirdparty/sndfile.h"
#endif
#endif /* SNDFILE_DECODER_H */

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#ifndef SNDDEF_H
#define SNDDEF_H
#if defined HAVE_SNDFILE && defined DYN_SNDFILE
#define DEFINE_ENTRY(type, name) static TReqProc<SndFileModule, type> p_##name{#name};
DEFINE_ENTRY(const char* (*)(SNDFILE* sndfile), sf_strerror)
DEFINE_ENTRY(int (*)(SNDFILE *sndfile), sf_close)
DEFINE_ENTRY(SNDFILE* (*)(SF_VIRTUAL_IO *sfvirtual, int mode, SF_INFO *sfinfo, void *user_data), sf_open_virtual)
DEFINE_ENTRY(sf_count_t (*)(SNDFILE *sndfile, float *ptr, sf_count_t frames), sf_readf_float)
DEFINE_ENTRY(sf_count_t(*)(SNDFILE* sndfile, short* ptr, sf_count_t frames), sf_readf_short)
DEFINE_ENTRY(sf_count_t (*)(SNDFILE *sndfile, sf_count_t frames, int whence), sf_seek)
#undef DEFINE_ENTRY
#ifndef IN_IDE_PARSER
#define sf_close p_sf_close
#define sf_open_virtual p_sf_open_virtual
#define sf_readf_float p_sf_readf_float
#define sf_seek p_sf_seek
#endif
#endif
#endif

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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;
}