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////////////////////////////////////////////////////////////
//
// SFML - Simple and Fast Multimedia Library
// Copyright (C) 2007-2015 Laurent Gomila (laurent@sfml-dev.org)
//
// This software is provided 'as-is', without any express or implied warranty.
// In no event will the authors be held liable for any damages arising from the use of this software.
//
// Permission is granted to anyone to use this software for any purpose,
// including commercial applications, and to alter it and redistribute it freely,
// subject to the following restrictions:
//
// 1. The origin of this software must not be misrepresented;
// you must not claim that you wrote the original software.
// If you use this software in a product, an acknowledgment
// in the product documentation would be appreciated but is not required.
//
// 2. Altered source versions must be plainly marked as such,
// and must not be misrepresented as being the original software.
//
// 3. This notice may not be removed or altered from any source distribution.
//
////////////////////////////////////////////////////////////
////////////////////////////////////////////////////////////
// Headers
////////////////////////////////////////////////////////////
#include <SFML/Audio/SoundFileReaderOgg.hpp>
#include <SFML/System/MemoryInputStream.hpp>
#include <SFML/System/Err.hpp>
#include <algorithm>
#include <cctype>
#include <cassert>
namespace
{
size_t read(void* ptr, size_t size, size_t nmemb, void* data)
{
sf::InputStream* stream = static_cast<sf::InputStream*>(data);
return static_cast<std::size_t>(stream->read(ptr, size * nmemb));
}
int seek(void* data, ogg_int64_t offset, int whence)
{
sf::InputStream* stream = static_cast<sf::InputStream*>(data);
switch (whence)
{
case SEEK_SET:
break;
case SEEK_CUR:
offset += stream->tell();
break;
case SEEK_END:
offset = stream->getSize() - offset;
}
return static_cast<int>(stream->seek(offset));
}
long tell(void* data)
{
sf::InputStream* stream = static_cast<sf::InputStream*>(data);
return static_cast<long>(stream->tell());
}
static ov_callbacks callbacks = {&read, &seek, NULL, &tell};
}
namespace sf
{
namespace priv
{
////////////////////////////////////////////////////////////
bool SoundFileReaderOgg::check(InputStream& stream)
{
OggVorbis_File file;
if (ov_test_callbacks(&stream, &file, NULL, 0, callbacks) == 0)
{
ov_clear(&file);
return true;
}
else
{
return false;
}
}
////////////////////////////////////////////////////////////
SoundFileReaderOgg::SoundFileReaderOgg() :
m_vorbis (),
m_channelCount(0)
{
m_vorbis.datasource = NULL;
}
////////////////////////////////////////////////////////////
SoundFileReaderOgg::~SoundFileReaderOgg()
{
close();
}
////////////////////////////////////////////////////////////
bool SoundFileReaderOgg::open(InputStream& stream, Info& info)
{
// Open the Vorbis stream
int status = ov_open_callbacks(&stream, &m_vorbis, NULL, 0, callbacks);
if (status < 0)
{
err() << "Failed to open Vorbis file for reading" << std::endl;
return false;
}
// Retrieve the music attributes
vorbis_info* vorbisInfo = ov_info(&m_vorbis, -1);
info.channelCount = vorbisInfo->channels;
info.sampleRate = vorbisInfo->rate;
info.sampleCount = static_cast<std::size_t>(ov_pcm_total(&m_vorbis, -1) * vorbisInfo->channels);
// We must keep the channel count for the seek function
m_channelCount = info.channelCount;
return true;
}
////////////////////////////////////////////////////////////
void SoundFileReaderOgg::seek(Uint64 sampleOffset)
{
assert(m_vorbis.datasource);
ov_pcm_seek(&m_vorbis, sampleOffset / m_channelCount);
}
////////////////////////////////////////////////////////////
Uint64 SoundFileReaderOgg::read(Int16* samples, Uint64 maxCount)
{
assert(m_vorbis.datasource);
// Try to read the requested number of samples, stop only on error or end of file
Uint64 count = 0;
while (count < maxCount)
{
int bytesToRead = static_cast<int>(maxCount - count) * sizeof(Int16);
long bytesRead = ov_read(&m_vorbis, reinterpret_cast<char*>(samples), bytesToRead, 0, 2, 1, NULL);
if (bytesRead > 0)
{
long samplesRead = bytesRead / sizeof(Int16);
count += samplesRead;
samples += samplesRead;
}
else
{
// error or end of file
break;
}
}
return count;
}
////////////////////////////////////////////////////////////
void SoundFileReaderOgg::close()
{
if (m_vorbis.datasource)
{
ov_clear(&m_vorbis);
m_vorbis.datasource = NULL;
m_channelCount = 0;
}
}
} // namespace priv
} // namespace sf
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