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116 lines
3.8 KiB
116 lines
3.8 KiB
#include <database.hpp>
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#include <fingerprints.hpp>
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#include <image_io.hpp>
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#include <mozaic.hpp>
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#include <read_database.hpp>
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#include <utilities.hpp>
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#include <av/sws.hpp>
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#include <boost/filesystem.hpp>
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extern "C" {
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#include <libavformat/avformat.h>
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#include <libavcodec/avcodec.h>
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#include <libavformat/avformat.h>
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#include <libswscale/swscale.h>
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}
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#include <algorithm>
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#include <iostream>
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#include <utility>
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static const int tile_width = 500;
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static const int tile_height = 500;
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using namespace std;
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using Metric = downscale;
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using Database = image_database<Metric>;
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static auto calculate_all_distances(Database const & db, string const & filename, int h_tiles, int v_tiles){
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using return_type = decltype(db.distances_for_image(std::declval<av::frame const &>()));
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Mozaic<return_type> mozaic(h_tiles, v_tiles);
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apply_to_tiles(filename, h_tiles, v_tiles, [&](int c, int r, av::frame const & frame){
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mozaic[r][c] = db.distances_for_image(frame);
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});
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return mozaic;
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}
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template <typename Mozaiq>
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static void save_mozaic(Mozaiq const & mozaic, string filename){
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auto const pix_fmt = AV_PIX_FMT_YUVJ444P;
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auto const codec_id= AV_CODEC_ID_MJPEG;
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auto const total_width = mozaic.h_tiles * tile_width;
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auto const total_height = mozaic.v_tiles * tile_height;
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// Create output frame
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std::vector<uint8_t, av::allocator<uint8_t>> data(make_u(avpicture_get_size(pix_fmt, total_width, total_height)), 0);
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const av::frame frame = av::frame_alloc();
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avpicture_fill(reinterpret_cast<AVPicture*>(frame.get()), data.data(), pix_fmt, total_width, total_height);
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frame->width = total_width;
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frame->height = total_height;
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frame->format = pix_fmt;
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// For each tile: get the part, copy input to it
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for(int r = 0; r < mozaic.v_tiles; ++r) {
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for(int c = 0; c < mozaic.h_tiles; ++c){
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auto frame_part = av::crop(frame, c * tile_width, r * tile_height, tile_width, tile_height);
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auto input = crop_to_square(open_image(mozaic[r][c]));
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auto context = sws::create_context(input, frame_part);
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sws::scale(context, input, frame_part);
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}
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}
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// Encode
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auto codec = avcodec_find_encoder(codec_id);
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if(!codec) throw av::error("Could not find codec");
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auto codec_ctx = std::unique_ptr<AVCodecContext, av::deleter<AVCodecContext>>(avcodec_alloc_context3(codec), [](auto x){ avcodec_free_context(&x); });
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if(!codec_ctx) throw av::error("Could not allocate codec context");
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codec_ctx->pix_fmt = pix_fmt;
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codec_ctx->width = frame->width;
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codec_ctx->height = frame->height;
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codec_ctx->time_base = av_make_q(1, 1);
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auto opened_codec = av::codec_open(codec_ctx.get(), codec, nullptr);
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auto const buffer_size = avpicture_get_size(pix_fmt, codec_ctx->width, codec_ctx->height);
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std::vector<uint8_t> buffer(make_u(buffer_size), 0);
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auto const output_size = avcodec_encode_video(codec_ctx.get(), buffer.data(), buffer_size, frame.get());
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assert(output_size <= buffer_size);
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auto file = fopen(filename.c_str(), "wb");
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fwrite(buffer.data(), 1, make_u(output_size), file);
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fclose(file);
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}
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int main(){
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av_register_all();
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av_log_set_level(AV_LOG_QUIET);
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// TODO: use boost::program_options
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string const database_directory = "vakantie";
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string const filename = "vakantie.jpg";
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string const output = "output/vakantie.jpg";
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int const h_tiles = 4*4;
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int const v_tiles = 3*4;
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auto const db = read_database<Metric>(database_directory);
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cout << colors::green("Read database: ") << db.size() << endl;
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auto const distances = calculate_all_distances(db, filename, h_tiles, v_tiles);
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cout << colors::green("Calculated distances for ") << filename << endl;
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auto const best_indices = optimize_unique(distances);
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cout << colors::green("Picked best distances") << endl;
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auto const mozaic = mozaic_fmap(best_indices, [&](auto i){ return db.filename(i); });
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cout << colors::green("Picked filenames") << endl;
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save_mozaic(mozaic, output);
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cout << colors::green("Saved Mozaic to ") << output << endl;
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}
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