/* * PNG image format * Copyright (c) 2003 Fabrice Bellard * * This file is part of FFmpeg. * * FFmpeg is free software; you can redistribute it and/or * modify it under the terms of the GNU Lesser General Public * License as published by the Free Software Foundation; either * version 2.1 of the License, or (at your option) any later version. * * FFmpeg 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 * Lesser General Public License for more details. * * You should have received a copy of the GNU Lesser General Public * License along with FFmpeg; if not, write to the Free Software * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA */ #ifndef AVCODEC_PNG_H #define AVCODEC_PNG_H #include <stdint.h> #include "pngdsp.h" #define PNG_COLOR_MASK_PALETTE … #define PNG_COLOR_MASK_COLOR … #define PNG_COLOR_MASK_ALPHA … #define PNG_COLOR_TYPE_GRAY … #define PNG_COLOR_TYPE_PALETTE … #define PNG_COLOR_TYPE_RGB … #define PNG_COLOR_TYPE_RGB_ALPHA … #define PNG_COLOR_TYPE_GRAY_ALPHA … #define PNG_FILTER_TYPE_LOCO … #define PNG_FILTER_VALUE_NONE … #define PNG_FILTER_VALUE_SUB … #define PNG_FILTER_VALUE_UP … #define PNG_FILTER_VALUE_AVG … #define PNG_FILTER_VALUE_PAETH … #define PNG_FILTER_VALUE_MIXED … #define NB_PASSES … #define PNGSIG … #define MNGSIG … /* Mask to determine which y pixels are valid in a pass */ extern const uint8_t ff_png_pass_ymask[NB_PASSES]; int ff_png_get_nb_channels(int color_type); /* compute the row size of an interleaved pass */ int ff_png_pass_row_size(int pass, int bits_per_pixel, int width); void ff_add_png_paeth_prediction(uint8_t *dst, uint8_t *src, uint8_t *top, int w, int bpp); void ff_png_filter_row(PNGDSPContext *dsp, uint8_t *dst, int filter_type, uint8_t *src, uint8_t *last, int size, int bpp); #endif /* AVCODEC_PNG_H */
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