/* libheif example application. MIT License Copyright (c) 2019 Dirk Farin <dirk.farin@gmail.com> Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions: The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software. THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */ #include "encoder_y4m.h" #include <cerrno> #include <cstring> #include <cassert> Y4MEncoder::Y4MEncoder() = default; void Y4MEncoder::UpdateDecodingOptions(const struct heif_image_handle* handle, struct heif_decoding_options* options) const { options->convert_hdr_to_8bit = 1; } bool Y4MEncoder::Encode(const struct heif_image_handle* handle, const struct heif_image* image, const std::string& filename) { FILE* fp = fopen(filename.c_str(), "wb"); if (!fp) { fprintf(stderr, "Can't open %s: %s\n", filename.c_str(), strerror(errno)); return false; } int y_stride, cb_stride, cr_stride; const uint8_t* yp = heif_image_get_plane_readonly(image, heif_channel_Y, &y_stride); const uint8_t* cbp = heif_image_get_plane_readonly(image, heif_channel_Cb, &cb_stride); const uint8_t* crp = heif_image_get_plane_readonly(image, heif_channel_Cr, &cr_stride); assert(y_stride > 0); assert(cb_stride > 0); assert(cr_stride > 0); int yw = heif_image_get_width(image, heif_channel_Y); int yh = heif_image_get_height(image, heif_channel_Y); int cw = heif_image_get_width(image, heif_channel_Cb); int ch = heif_image_get_height(image, heif_channel_Cb); if (yw < 0 || cw < 0) { fclose(fp); return false; } fprintf(fp, "YUV4MPEG2 W%d H%d F30:1\nFRAME\n", yw, yh); for (int y = 0; y < yh; y++) { fwrite(yp + y * y_stride, 1, yw, fp); } for (int y = 0; y < ch; y++) { fwrite(cbp + y * cb_stride, 1, cw, fp); } for (int y = 0; y < ch; y++) { fwrite(crp + y * cr_stride, 1, cw, fp); } fclose(fp); return true; }