///////////////////////////////////////////////////////////////////////////////
// LameXP - Audio Encoder Front-End
// Copyright (C) 2004-2020 LoRd_MuldeR <MuldeR2@GMX.de>
//
// This program is free software; you can redistribute it and/or modify
// it under the terms of the GNU GENERAL PUBLIC LICENSE as published by
// the Free Software Foundation; either version 2 of the License, or
// (at your option) any later version; always including the non-optional
// LAMEXP GNU GENERAL PUBLIC LICENSE ADDENDUM. See "License.txt" file!
//
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License along
// with this program; if not, write to the Free Software Foundation, Inc.,
// 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
//
// http://www.gnu.org/licenses/gpl-2.0.txt
///////////////////////////////////////////////////////////////////////////////

#include "Encoder_AAC_QAAC.h"

//Internal
#include "Global.h"
#include "Model_Settings.h"

//MUtils
#include <MUtils/Global.h>

//StdLib
#include <math.h>

//Qt
#include <QProcess>
#include <QDir>
#include <QCoreApplication>

static int index2bitrate(const int index)
{
	return (index < 32) ? ((index + 1) * 8) : ((index - 15) * 16);
}

static const int g_qaacVBRQualityLUT[16] = {0 ,9, 18, 27, 36, 45, 54, 63, 73, 82, 91, 100, 109, 118, 127, INT_MAX};

static const int RESAMPLING_QUALITY = 127;

///////////////////////////////////////////////////////////////////////////////
// Encoder Info
///////////////////////////////////////////////////////////////////////////////

class QAACEncoderInfo : public AbstractEncoderInfo
{
	virtual bool isModeSupported(int mode) const
	{
		switch(mode)
		{
		case SettingsModel::VBRMode:
		case SettingsModel::CBRMode:
		case SettingsModel::ABRMode:
			return true;
			break;
		default:
			MUTILS_THROW("Bad RC mode specified!");
		}
	}

	virtual int valueCount(int mode) const
	{
		switch(mode)
		{
		case SettingsModel::VBRMode:
			return 15;
			break;
		case SettingsModel::ABRMode:
		case SettingsModel::CBRMode:
			return 52;
			break;
		default:
			MUTILS_THROW("Bad RC mode specified!");
		}
	}

	virtual int valueAt(int mode, int index) const
	{
		switch(mode)
		{
		case SettingsModel::VBRMode:
			return g_qaacVBRQualityLUT[qBound(0, index , 14)];
			break;
		case SettingsModel::ABRMode:
		case SettingsModel::CBRMode:
			return qBound(8, index2bitrate(index), 576);
			break;
		default:
			MUTILS_THROW("Bad RC mode specified!");
		}
	}

	virtual int valueType(int mode) const
	{
		switch(mode)
		{
		case SettingsModel::VBRMode:
			return TYPE_QUALITY_LEVEL_INT;
			break;
		case SettingsModel::ABRMode:
			return TYPE_APPROX_BITRATE;
			break;
		case SettingsModel::CBRMode:
			return TYPE_BITRATE;
			break;
		default:
			MUTILS_THROW("Bad RC mode specified!");
		}
	}

	virtual const char *description(void) const
	{
		static const char* s_description = "QAAC/QuickTime (\x0C2\x0A9 Apple Inc.)";
		return s_description;
	}

	virtual const char *extension(void) const
	{
		static const char* s_extension = "mp4";
		return s_extension;
	}

	virtual bool isResamplingSupported(void) const
	{
		return true;
	}
}
static const g_qaacEncoderInfo;

///////////////////////////////////////////////////////////////////////////////
// Encoder implementation
///////////////////////////////////////////////////////////////////////////////

QAACEncoder::QAACEncoder(void)
:
	m_binary_qaac32(lamexp_tools_lookup(L1S("qaac.exe"))),
	m_binary_qaac64(lamexp_tools_lookup(L1S("qaac64.exe")))
{
	if(m_binary_qaac32.isEmpty() && m_binary_qaac64.isEmpty())
	{
		MUTILS_THROW("Error initializing QAAC. Tool 'qaac.exe' is not registred!");
	}

	m_configProfile = 0;
	m_algorithmQuality = 2;
}

QAACEncoder::~QAACEncoder(void)
{
}

bool QAACEncoder::encode(const QString &sourceFile, const AudioFileModel_MetaInfo &metaInfo, const unsigned int duration, const unsigned int channels, const QString &outputFile, QAtomicInt &abortFlag)
{
	const QString qaac_bin = m_binary_qaac64.isEmpty() ? m_binary_qaac32 : m_binary_qaac64;

	QProcess process;
	QStringList args;

	QProcessEnvironment env = QProcessEnvironment::systemEnvironment();
	env.insert(L1S("PATH"), QDir::toNativeSeparators(QString("%1;%1/QTfiles;%2").arg(QDir(QCoreApplication::applicationDirPath()).canonicalPath(), MUtils::temp_folder())));
	process.setProcessEnvironment(env);

	if(m_configRCMode != SettingsModel::VBRMode)
	{
		switch(m_configProfile)
		{
		case 2:
		case 3:
			args << L1S("--he"); //Forces use of HE AAC profile (there is no explicit HEv2 switch for QAAC)
			break;
		}
	}

	switch(m_configRCMode)
	{
	case SettingsModel::CBRMode:
		args << L1S("--cbr") << QString::number(qBound(8, index2bitrate(m_configBitrate), 576));
		break;
	case SettingsModel::ABRMode:
		args << L1S("--cvbr") << QString::number(qBound(8, index2bitrate(m_configBitrate), 576));
		break;
	case SettingsModel::VBRMode:
		args << L1S("--tvbr") << QString::number(g_qaacVBRQualityLUT[qBound(0, m_configBitrate , 14)]);
		break;
	default:
		MUTILS_THROW("Bad rate-control mode!");
		break;
	}

	args << L1S("--quality") << QString::number(qBound(0, m_algorithmQuality, 2));
	if (m_configSamplingRate > 0)
	{
		args << QString("--native-resampler=bats,%0").arg(QString::number(RESAMPLING_QUALITY));
		args << L1S("--rate") << QString::number(m_configSamplingRate);
	}

	if(!m_configCustomParams.isEmpty()) args << m_configCustomParams.split(" ", QString::SkipEmptyParts);

	if(!metaInfo.title().isEmpty())   args << L1S("--title")   << cleanTag(metaInfo.title());
	if(!metaInfo.artist().isEmpty())  args << L1S("--artist")  << cleanTag(metaInfo.artist());
	if(!metaInfo.album().isEmpty())   args << L1S("--album")   << cleanTag(metaInfo.album());
	if(!metaInfo.genre().isEmpty())   args << L1S("--genre")   << cleanTag(metaInfo.genre());
	if(!metaInfo.comment().isEmpty()) args << L1S("--comment") << cleanTag( metaInfo.comment());
	if(metaInfo.year())               args << L1S("--date")    << QString::number(metaInfo.year());
	if(metaInfo.position())           args << L1S("--track")   << QString::number(metaInfo.position());
	if(!metaInfo.cover().isEmpty())   args << L1S("--artwork") << metaInfo.cover();

	args << L1S("-d") << L1S(".");
	args << L1S("-o") << QDir::toNativeSeparators(outputFile);
	args << QDir::toNativeSeparators(sourceFile);

	if(!startProcess(process, qaac_bin, args, QFileInfo(outputFile).canonicalPath()))
	{
		return false;
	}

	int prevProgress = -1;
	QRegExp regExp(L1S("\\[(\\d+)\\.(\\d)%\\]"));

	const result_t result = awaitProcess(process, abortFlag, [this, &prevProgress, &regExp](const QString &text)
	{
		if (regExp.lastIndexIn(text) >= 0)
		{
			qint32 newProgress;
			if (MUtils::regexp_parse_int32(regExp, newProgress))
			{
				if (newProgress > prevProgress)
				{
					emit statusUpdated(newProgress);
					prevProgress = NEXT_PROGRESS(newProgress);
				}
			}
			return true;
		}
		return false;
	});

	return (result == RESULT_SUCCESS);
}

bool QAACEncoder::isFormatSupported(const QString &containerType, const QString &containerProfile, const QString &formatType, const QString &formatProfile, const QString &formatVersion)
{
	if(containerType.compare(L1S("Wave"), Qt::CaseInsensitive) == 0)
	{
		if(formatType.compare(L1S("PCM"), Qt::CaseInsensitive) == 0)
		{
			return true;
		}
	}

	return false;
}

void QAACEncoder::setProfile(int profile)
{
	m_configProfile = profile;
}

void QAACEncoder::setAlgoQuality(int value)
{
	m_algorithmQuality = qBound(0, value, 2);
}

const AbstractEncoderInfo *QAACEncoder::getEncoderInfo(void)
{
	return &g_qaacEncoderInfo;
}