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// Copyright (C) 2010 Dirk Vanden Boer <dirk.vdb@gmail.com>
//
// 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.
//
// 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
#ifndef VIDEO_THUMBNAILER_H
#define VIDEO_THUMBNAILER_H
#include <string>
#include <vector>
#include <map>
#include <cinttypes>
#include <functional>
#include "ifilter.h"
#include "ffmpegthumbnailertypes.h"
struct AVFormatContext;
namespace ffmpegthumbnailer
{
struct VideoFrame;
class ImageWriter;
class MovieDecoder;
template <typename T>
struct Histogram;
struct VideoFrameInfo
{
int width = 0;
int height = 0;
ThumbnailerImageSource source = ThumbnailerImageSourceVideoStream;
};
class VideoThumbnailer
{
public:
VideoThumbnailer();
VideoThumbnailer(int thumbnailSize, bool workaroundIssues, bool maintainAspectRatio, int imageQuality, bool smartFrameSelection);
VideoFrameInfo generateThumbnail(const std::string& videoFile, ThumbnailerImageType type, const std::string& outputFile, AVFormatContext* pAvContext = nullptr);
VideoFrameInfo generateThumbnail(const std::string& videoFile, ThumbnailerImageType type, std::vector<uint8_t>& buffer, AVFormatContext* pAvContext = nullptr);
void setThumbnailSize(int size);
void setThumbnailSize(int width, int height);
void setThumbnailSize(const std::string& size);
void setSeekPercentage(int percentage);
void setSeekTime(const std::string& seekTime);
void setWorkAroundIssues(bool workAround);
void setImageQuality(int imageQuality);
void setMaintainAspectRatio(bool enabled);
void setPreferEmbeddedMetadata(bool enabled);
void setSmartFrameSelection(bool enabled);
void addFilter(IFilter* pFilter);
void removeFilter(IFilter* pFilter);
void clearFilters();
void setLogCallback(std::function<void(ThumbnailerLogLevel, const std::string&)> cb);
private:
VideoFrameInfo generateThumbnail(const std::string& videoFile, ImageWriter& imageWriter, AVFormatContext* pAvContext = nullptr);
void generateSmartThumbnail(MovieDecoder& movieDecoder, VideoFrame& videoFrame);
void writeImage(const std::string& videoFile, ImageWriter& imageWriter, const VideoFrame& videoFrame, int duration, std::vector<uint8_t*>& rowPointers);
std::string getMimeType(const std::string& videoFile);
std::string getExtension(const std::string& videoFilename);
int getBestThumbnailIndex(std::vector<VideoFrame>& videoFrames, const std::vector<Histogram<int> >& histograms);
void applyFilters(VideoFrame& frameData);
void TraceMessage(ThumbnailerLogLevel lvl, const std::string& msg);
private:
std::string m_ThumbnailSize;
uint16_t m_SeekPercentage;
bool m_OverlayFilmStrip;
bool m_WorkAroundIssues;
int m_ImageQuality;
bool m_MaintainAspectRatio;
bool m_SmartFrameSelection;
bool m_PreferEmbeddedMetadata;
std::string m_SeekTime;
std::vector<IFilter*> m_Filters;
std::function<void(ThumbnailerLogLevel, const std::string&)> m_LogCb;
};
}
#endif
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