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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/SoundFileWriterFlac.hpp>
#include <SFML/System/Err.hpp>
#include <algorithm>
#include <cctype>
#include <cassert>
namespace sf
{
namespace priv
{
////////////////////////////////////////////////////////////
bool SoundFileWriterFlac::check(const std::string& filename)
{
std::string extension = filename.substr(filename.find_last_of(".") + 1);
std::transform(extension.begin(), extension.end(), extension.begin(), ::tolower);
return extension == "flac";
}
////////////////////////////////////////////////////////////
SoundFileWriterFlac::SoundFileWriterFlac() :
m_encoder (NULL),
m_channelCount(0),
m_samples32 ()
{
}
////////////////////////////////////////////////////////////
SoundFileWriterFlac::~SoundFileWriterFlac()
{
close();
}
////////////////////////////////////////////////////////////
bool SoundFileWriterFlac::open(const std::string& filename, unsigned int sampleRate, unsigned int channelCount)
{
// Create the encoder
m_encoder = FLAC__stream_encoder_new();
if (!m_encoder)
{
err() << "Failed to write flac file \"" << filename << "\" (failed to allocate encoder)" << std::endl;
return false;
}
// Setup the encoder
FLAC__stream_encoder_set_channels(m_encoder, channelCount);
FLAC__stream_encoder_set_bits_per_sample(m_encoder, 16);
FLAC__stream_encoder_set_sample_rate(m_encoder, sampleRate);
// Initialize the output stream
if (FLAC__stream_encoder_init_file(m_encoder, filename.c_str(), NULL, NULL) != FLAC__STREAM_ENCODER_INIT_STATUS_OK)
{
err() << "Failed to write flac file \"" << filename << "\" (failed to open the file)" << std::endl;
close();
return false;
}
// Store the channel count
m_channelCount = channelCount;
return true;
}
////////////////////////////////////////////////////////////
void SoundFileWriterFlac::write(const Int16* samples, Uint64 count)
{
while (count > 0)
{
// Make sure that we don't process too many samples at once
unsigned int frames = std::min(static_cast<unsigned int>(count / m_channelCount), 10000u);
// Convert the samples to 32-bits
m_samples32.assign(samples, samples + frames * m_channelCount);
// Write them to the FLAC stream
FLAC__stream_encoder_process_interleaved(m_encoder, &m_samples32[0], frames);
// Next chunk
count -= m_samples32.size();
samples += m_samples32.size();
}
}
////////////////////////////////////////////////////////////
void SoundFileWriterFlac::close()
{
if (m_encoder)
{
// Close the output stream
FLAC__stream_encoder_finish(m_encoder);
// Destroy the encoder
FLAC__stream_encoder_delete(m_encoder);
m_encoder = NULL;
}
}
} // namespace priv
} // namespace sf
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