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Diffstat (limited to 'contrib/ffmpeg/libavcodec/rle.c')
-rw-r--r--contrib/ffmpeg/libavcodec/rle.c84
1 files changed, 0 insertions, 84 deletions
diff --git a/contrib/ffmpeg/libavcodec/rle.c b/contrib/ffmpeg/libavcodec/rle.c
deleted file mode 100644
index 2fb0d0e48..000000000
--- a/contrib/ffmpeg/libavcodec/rle.c
+++ /dev/null
@@ -1,84 +0,0 @@
-/*
- * RLE encoder
- * Copyright (c) 2007 Bobby Bingham
- *
- * 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 "rle.h"
-
-/**
- * Count up to 127 consecutive pixels which are either all the same or
- * all differ from the previous and next pixels.
- * @param start Pointer to the first pixel
- * @param len Maximum number of pixels
- * @param bpp Bytes per pixel
- * @param same 1 if searching for identical pixel values. 0 for differing
- * @return Number of matching consecutive pixels found
- */
-static int count_pixels(const uint8_t *start, int len, int bpp, int same)
-{
- const uint8_t *pos;
- int count = 1;
-
- for(pos = start + bpp; count < FFMIN(128, len); pos += bpp, count ++) {
- if(same != !memcmp(pos-bpp, pos, bpp)) {
- if(!same) {
- /* if bpp == 1, then 0 1 1 0 is more efficiently encoded as a single
- * raw block of pixels. for larger bpp, RLE is as good or better */
- if(bpp == 1 && count + 1 < FFMIN(128, len) && *pos != *(pos+1))
- continue;
-
- /* if RLE can encode the next block better than as a raw block,
- * back up and leave _all_ the identical pixels for RLE */
- count --;
- }
- break;
- }
- }
-
- return count;
-}
-
-int ff_rle_encode(uint8_t *outbuf, int out_size, const uint8_t *ptr , int bpp, int w,
- int add_rep, int xor_rep, int add_raw, int xor_raw)
-{
- int count, x;
- uint8_t *out = outbuf;
-
- for(x = 0; x < w; x += count) {
- /* see if we can encode the next set of pixels with RLE */
- if((count = count_pixels(ptr, w-x, bpp, 1)) > 1) {
- if(out + bpp + 1 > outbuf + out_size) return -1;
- *out++ = (count ^ xor_rep) + add_rep;
- memcpy(out, ptr, bpp);
- out += bpp;
- } else {
- /* fall back on uncompressed */
- count = count_pixels(ptr, w-x, bpp, 0);
- *out++ = (count ^ xor_raw) + add_raw;
-
- if(out + bpp*count > outbuf + out_size) return -1;
- memcpy(out, ptr, bpp * count);
- out += bpp * count;
- }
-
- ptr += count * bpp;
- }
-
- return out - outbuf;
-}