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#include "AudioReaderMpt.h"
#if defined(WITH_OPENMPT)
#if defined(DEATH_TARGET_WINDOWS) && !defined(CMAKE_BUILD) && !defined(WITH_OPENMPT_DYNAMIC)
# if defined(_M_X64)
# pragma comment(lib, "../Libs/Windows/x64/libopenmpt.lib")
# elif defined(_M_IX86)
# pragma comment(lib, "../Libs/Windows/x86/libopenmpt.lib")
# else
# error Unsupported architecture
# endif
#endif
#if defined(WITH_OPENMPT_DYNAMIC) && (defined(DEATH_TARGET_UNIX) || defined(DEATH_TARGET_APPLE))
# include <dlfcn.h>
#endif
#include <cstring>
using namespace Death::IO;
namespace nCine
{
#if defined(WITH_OPENMPT_DYNAMIC)
void* AudioReaderMpt::_openmptLib = nullptr;
bool AudioReaderMpt::_openmptLibInitialized = false;
AudioReaderMpt::openmpt_module_create2_t* AudioReaderMpt::_openmpt_module_create2 = nullptr;
AudioReaderMpt::openmpt_module_destroy_t* AudioReaderMpt::_openmpt_module_destroy = nullptr;
AudioReaderMpt::openmpt_module_read_interleaved_stereo_t* AudioReaderMpt::_openmpt_module_read_interleaved_stereo = nullptr;
AudioReaderMpt::openmpt_module_set_position_seconds_t* AudioReaderMpt::_openmpt_module_set_position_seconds = nullptr;
AudioReaderMpt::openmpt_module_set_repeat_count_t* AudioReaderMpt::_openmpt_module_set_repeat_count = nullptr;
#endif
AudioReaderMpt::AudioReaderMpt(std::unique_ptr<Stream> fileHandle, int frequency)
: _fileHandle(std::move(fileHandle)), _frequency(frequency), _module(nullptr)
{
if (!_fileHandle->IsValid()) {
return;
}
#if defined(WITH_OPENMPT_DYNAMIC)
if (TryLoadLibrary()) {
openmpt_stream_callbacks stream_callbacks;
stream_callbacks.read = stream_read_func;
stream_callbacks.seek = stream_seek_func;
stream_callbacks.tell = stream_tell_func;
_module = _openmpt_module_create2(stream_callbacks, this, InternalLog, nullptr, nullptr, nullptr, nullptr, nullptr, nullptr);
}
#else
openmpt_stream_callbacks stream_callbacks;
stream_callbacks.read = stream_read_func;
stream_callbacks.seek = stream_seek_func;
stream_callbacks.tell = stream_tell_func;
_module = openmpt_module_create2(stream_callbacks, this, InternalLog, nullptr, nullptr, nullptr, nullptr, nullptr, nullptr);
#endif
}
AudioReaderMpt::~AudioReaderMpt()
{
if (_module != nullptr) {
#if defined(WITH_OPENMPT_DYNAMIC)
_openmpt_module_destroy(_module);
#else
openmpt_module_destroy(_module);
#endif
_module = nullptr;
}
}
std::int32_t AudioReaderMpt::read(void* buffer, std::int32_t bufferSize) const
{
if (_module == nullptr) {
return 0;
}
#if defined(WITH_OPENMPT_DYNAMIC)
std::size_t count = _openmpt_module_read_interleaved_stereo(
_module, _frequency,
bufferSize / (2 * sizeof(int16_t)), // Buffer size per channel
(int16_t*)buffer
);
#else
std::size_t count = openmpt_module_read_interleaved_stereo(
_module, _frequency,
bufferSize / (2 * sizeof(std::int16_t)), // Buffer size per channel
(std::int16_t*)buffer
);
#endif
// Number of frames * channel count * size of sample
return std::int32_t(count) * 2 * sizeof(std::int16_t);
}
void AudioReaderMpt::rewind() const
{
if (_module != nullptr) {
#if defined(WITH_OPENMPT_DYNAMIC)
_openmpt_module_set_position_seconds(_module, 0.0);
#else
openmpt_module_set_position_seconds(_module, 0.0);
#endif
}
}
void AudioReaderMpt::setLooping(bool value)
{
if (_module != nullptr) {
// Turn on infinite repeat if required
#if defined(WITH_OPENMPT_DYNAMIC)
_openmpt_module_set_repeat_count(_module, value ? -1 : 0);
#else
openmpt_module_set_repeat_count(_module, value ? -1 : 0);
#endif
}
}
#if defined(WITH_OPENMPT_DYNAMIC)
bool AudioReaderMpt::TryLoadLibrary()
{
if (_openmptLibInitialized) {
return (_openmptLib != nullptr);
}
_openmptLibInitialized = true;
_openmptLib = ::dlopen("libopenmpt.so", RTLD_LAZY);
if (_openmptLib == nullptr) {
return false;
}
_openmpt_module_create2 = (openmpt_module_create2_t*)::dlsym(_openmptLib, "openmpt_module_create2");
_openmpt_module_destroy = (openmpt_module_destroy_t*)::dlsym(_openmptLib, "openmpt_module_destroy");
_openmpt_module_read_interleaved_stereo = (openmpt_module_read_interleaved_stereo_t*)::dlsym(_openmptLib, "openmpt_module_read_interleaved_stereo");
_openmpt_module_set_position_seconds = (openmpt_module_set_position_seconds_t*)::dlsym(_openmptLib, "openmpt_module_set_position_seconds");
_openmpt_module_set_repeat_count = (openmpt_module_set_repeat_count_t*)::dlsym(_openmptLib, "openmpt_module_set_repeat_count");
if (_openmpt_module_create2 == nullptr || _openmpt_module_destroy == nullptr || _openmpt_module_read_interleaved_stereo == nullptr ||
_openmpt_module_set_position_seconds == nullptr || _openmpt_module_set_repeat_count == nullptr) {
::dlclose(_openmptLib);
_openmptLib = nullptr;
return false;
}
return true;
}
#endif
std::size_t AudioReaderMpt::stream_read_func(void* stream, void* dst, std::size_t bytes)
{
AudioReaderMpt* _this = static_cast<AudioReaderMpt*>(stream);
return _this->_fileHandle->Read(dst, (unsigned long)bytes);
}
std::int32_t AudioReaderMpt::stream_seek_func(void* stream, std::int64_t offset, std::int32_t whence)
{
SeekOrigin origin;
switch (whence) {
default:
case OPENMPT_STREAM_SEEK_SET: origin = SeekOrigin::Begin; break;
case OPENMPT_STREAM_SEEK_CUR: origin = SeekOrigin::Current; break;
case OPENMPT_STREAM_SEEK_END: origin = SeekOrigin::End; break;
}
AudioReaderMpt* _this = static_cast<AudioReaderMpt*>(stream);
_this->_fileHandle->Seek(offset, origin);
return 0;
}
std::int64_t AudioReaderMpt::stream_tell_func(void* stream)
{
AudioReaderMpt* _this = static_cast<AudioReaderMpt*>(stream);
return _this->_fileHandle->GetPosition();
}
void AudioReaderMpt::InternalLog(const char* message, void* user)
{
LOGI("{}", message);
}
}
#endif
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