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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
#include "videothumbnailerc.h"
#include "videothumbnailer.h"
#include "filmstripfilter.h"
#include <vector>
#include <stdexcept>
using namespace ffmpegthumbnailer;
struct thumbnailer_data
{
VideoThumbnailer thumbnailer;
FilmStripFilter filter;
thumbnailer_log_callback log_cb = nullptr;
};
static void trace_message(video_thumbnailer* thumbnailer, ThumbnailerLogLevel lvl, const char* message)
{
if (thumbnailer->tdata->log_cb)
{
thumbnailer->tdata->log_cb(lvl, message);
}
}
extern "C" video_thumbnailer* video_thumbnailer_create(void)
{
auto thumbnailer = new video_thumbnailer_struct();
thumbnailer->thumbnail_size = 128;
thumbnailer->seek_percentage = 10;
thumbnailer->seek_time = nullptr;
thumbnailer->overlay_film_strip = 0;
thumbnailer->workaround_bugs = 0;
thumbnailer->thumbnail_image_quality = 8;
thumbnailer->thumbnail_image_type = Png;
thumbnailer->maintain_aspect_ratio = 1;
thumbnailer->prefer_embedded_metadata = 0;
thumbnailer->av_format_context = nullptr;
thumbnailer->tdata = new thumbnailer_data();
return thumbnailer;
}
extern "C" void video_thumbnailer_destroy(video_thumbnailer* thumbnailer)
{
delete thumbnailer->tdata;
delete thumbnailer;
}
extern "C" image_data* video_thumbnailer_create_image_data(void)
{
auto data = new image_data();
data->image_data_ptr = nullptr;
data->image_data_size = 0;
data->image_data_width = 0;
data->image_data_height = 0;
data->internal_data = new std::vector<uint8_t>();
return data;
}
extern "C" void video_thumbnailer_destroy_image_data(image_data* data)
{
data->image_data_ptr = nullptr;
data->image_data_size = 0;
data->image_data_width = 0;
data->image_data_height = 0;
auto dataVector = reinterpret_cast<std::vector<uint8_t>*>(data->internal_data);
delete dataVector;
data->internal_data = nullptr;
delete data;
}
static void setProperties(video_thumbnailer* thumbnailer)
{
auto& videoThumbnailer = thumbnailer->tdata->thumbnailer;
if (thumbnailer->thumbnail_size >= 0)
{
videoThumbnailer.setThumbnailSize(thumbnailer->thumbnail_size);
}
videoThumbnailer.setWorkAroundIssues(thumbnailer->workaround_bugs != 0);
videoThumbnailer.setImageQuality(thumbnailer->thumbnail_image_quality);
videoThumbnailer.setMaintainAspectRatio(thumbnailer->maintain_aspect_ratio != 0);
videoThumbnailer.setPreferEmbeddedMetadata(thumbnailer->prefer_embedded_metadata != 0);
if (thumbnailer->overlay_film_strip)
{
videoThumbnailer.removeFilter(&thumbnailer->tdata->filter);
videoThumbnailer.addFilter(&thumbnailer->tdata->filter);
}
if (thumbnailer->seek_time != nullptr)
{
videoThumbnailer.setSeekTime(thumbnailer->seek_time);
}
else
{
videoThumbnailer.setSeekPercentage(thumbnailer->seek_percentage);
}
}
extern "C" int video_thumbnailer_generate_thumbnail_to_buffer(video_thumbnailer* thumbnailer, const char* movie_filename, image_data* generated_image_data)
{
try
{
auto dataVector = reinterpret_cast<std::vector<uint8_t>*>(generated_image_data->internal_data);
auto& videoThumbnailer = thumbnailer->tdata->thumbnailer;
setProperties(thumbnailer);
auto info = videoThumbnailer.generateThumbnail(movie_filename, thumbnailer->thumbnail_image_type, *dataVector, thumbnailer->av_format_context);
generated_image_data->image_data_ptr = &dataVector->front();
generated_image_data->image_data_size = static_cast<int>(dataVector->size());
generated_image_data->image_data_width = info.width;
generated_image_data->image_data_height = info.height;
generated_image_data->image_data_source = info.source;
}
catch (const std::exception& e)
{
trace_message(thumbnailer, ThumbnailerLogLevelError, e.what());
return -1;
}
return 0;
}
extern "C" int video_thumbnailer_generate_thumbnail_to_file(video_thumbnailer* thumbnailer, const char* movie_filename, const char* output_fileName)
{
try
{
auto& videoThumbnailer = thumbnailer->tdata->thumbnailer;
setProperties(thumbnailer);
videoThumbnailer.generateThumbnail(movie_filename, thumbnailer->thumbnail_image_type, output_fileName, thumbnailer->av_format_context);
}
catch (const std::exception& e)
{
trace_message(thumbnailer, ThumbnailerLogLevelError, e.what());
return -1;
}
return 0;
}
extern "C" void video_thumbnailer_set_log_callback(video_thumbnailer* thumbnailer, thumbnailer_log_callback cb)
{
thumbnailer->tdata->log_cb = cb;
auto& videoThumbnailer = thumbnailer->tdata->thumbnailer;
if (!cb)
{
videoThumbnailer.setLogCallback(nullptr);
}
else
{
videoThumbnailer.setLogCallback([=] (ThumbnailerLogLevel lvl, const std::string& msg) {
cb(lvl, msg.c_str());
});
}
}
extern "C" int video_thumbnailer_set_size(video_thumbnailer* thumbnailer, int width, int height)
{
auto& videoThumbnailer = thumbnailer->tdata->thumbnailer;
try
{
thumbnailer->thumbnail_size = -1;
videoThumbnailer.setThumbnailSize(width, height);
return 0;
}
catch (const std::exception& e)
{
trace_message(thumbnailer, ThumbnailerLogLevelError, e.what());
return -1;
}
}
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