diff options
| author | Tim Redfern <tim@eclectronics.org> | 2013-09-05 17:55:35 +0100 |
|---|---|---|
| committer | Tim Redfern <tim@eclectronics.org> | 2013-09-05 17:55:35 +0100 |
| commit | 741fb4b9e135cfb161a749db88713229038577bb (patch) | |
| tree | 08bc9925659cbcac45162bacf31dc6336d4f60b4 /ffmpeg1/libavcodec/png.c | |
| parent | a2e1bf3495b7bfefdaedb8fc737e969ab06df079 (diff) | |
making act segmenter
Diffstat (limited to 'ffmpeg1/libavcodec/png.c')
| -rw-r--r-- | ffmpeg1/libavcodec/png.c | 72 |
1 files changed, 0 insertions, 72 deletions
diff --git a/ffmpeg1/libavcodec/png.c b/ffmpeg1/libavcodec/png.c deleted file mode 100644 index b398d91..0000000 --- a/ffmpeg1/libavcodec/png.c +++ /dev/null @@ -1,72 +0,0 @@ -/* - * 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 - */ -#include "avcodec.h" -#include "png.h" - -/* Mask to determine which y pixels are valid in a pass */ -const uint8_t ff_png_pass_ymask[NB_PASSES] = { - 0x80, 0x80, 0x08, 0x88, 0x22, 0xaa, 0x55, -}; - -/* minimum x value */ -static const uint8_t ff_png_pass_xmin[NB_PASSES] = { - 0, 4, 0, 2, 0, 1, 0 -}; - -/* x shift to get row width */ -static const uint8_t ff_png_pass_xshift[NB_PASSES] = { - 3, 3, 2, 2, 1, 1, 0 -}; - -void *ff_png_zalloc(void *opaque, unsigned int items, unsigned int size) -{ - return av_mallocz_array(items, size); -} - -void ff_png_zfree(void *opaque, void *ptr) -{ - av_free(ptr); -} - -int ff_png_get_nb_channels(int color_type) -{ - int channels; - channels = 1; - if ((color_type & (PNG_COLOR_MASK_COLOR | PNG_COLOR_MASK_PALETTE)) == - PNG_COLOR_MASK_COLOR) - channels = 3; - if (color_type & PNG_COLOR_MASK_ALPHA) - channels++; - return channels; -} - -/* compute the row size of an interleaved pass */ -int ff_png_pass_row_size(int pass, int bits_per_pixel, int width) -{ - int shift, xmin, pass_width; - - xmin = ff_png_pass_xmin[pass]; - if (width <= xmin) - return 0; - shift = ff_png_pass_xshift[pass]; - pass_width = (width - xmin + (1 << shift) - 1) >> shift; - return (pass_width * bits_per_pixel + 7) >> 3; -} |
