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Diffstat (limited to 'contrib/ffmpeg/libavcodec/targaenc.c')
| -rw-r--r-- | contrib/ffmpeg/libavcodec/targaenc.c | 199 |
1 files changed, 0 insertions, 199 deletions
diff --git a/contrib/ffmpeg/libavcodec/targaenc.c b/contrib/ffmpeg/libavcodec/targaenc.c deleted file mode 100644 index 8b36e1d3d..000000000 --- a/contrib/ffmpeg/libavcodec/targaenc.c +++ /dev/null @@ -1,199 +0,0 @@ -/* - * Targa (.tga) image 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" - -/** - * 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(uint8_t *start, int len, int bpp, int same) -{ - 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; -} - -/** - * RLE compress the image, with maximum size of out_size - * @param outbuf Output buffer - * @param out_size Maximum output size - * @param pic Image to compress - * @param bpp Bytes per pixel - * @param w Image width - * @param h Image height - * @return Size of output in bytes, or -1 if larger than out_size - */ -static int targa_encode_rle(uint8_t *outbuf, int out_size, AVFrame *pic, - int bpp, int w, int h) -{ - int count, x, y; - uint8_t *ptr, *line, *out; - - out = outbuf; - line = pic->data[0]; - - for(y = 0; y < h; y ++) { - ptr = line; - - 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++ = 0x80 | (count - 1); - memcpy(out, ptr, bpp); - out += bpp; - } else { - /* fall back on uncompressed */ - count = count_pixels(ptr, w-x, bpp, 0); - *out++ = count - 1; - - if(out + bpp*count > outbuf + out_size) return -1; - memcpy(out, ptr, bpp * count); - out += bpp * count; - } - ptr += count * bpp; - } - - line += pic->linesize[0]; - } - - return out - outbuf; -} - -static int targa_encode_normal(uint8_t *outbuf, AVFrame *pic, int bpp, int w, int h) -{ - int i, n = bpp * w; - uint8_t *out = outbuf; - uint8_t *ptr = pic->data[0]; - - for(i=0; i < h; i++) { - memcpy(out, ptr, n); - out += n; - ptr += pic->linesize[0]; - } - - return out - outbuf; -} - -static int targa_encode_frame(AVCodecContext *avctx, - unsigned char *outbuf, - int buf_size, void *data){ - AVFrame *p = data; - int bpp, picsize, datasize; - uint8_t *out; - - if(avctx->width > 0xffff || avctx->height > 0xffff) { - av_log(avctx, AV_LOG_ERROR, "image dimensions too large\n"); - return -1; - } - picsize = avpicture_get_size(avctx->pix_fmt, avctx->width, avctx->height); - if(buf_size < picsize + 45) { - av_log(avctx, AV_LOG_ERROR, "encoded frame too large\n"); - return -1; - } - - p->pict_type= FF_I_TYPE; - p->key_frame= 1; - - /* zero out the header and only set applicable fields */ - memset(outbuf, 0, 11); - AV_WL16(outbuf+12, avctx->width); - AV_WL16(outbuf+14, avctx->height); - outbuf[17] = 0x20; /* origin is top-left. no alpha */ - - /* TODO: support alpha channel */ - switch(avctx->pix_fmt) { - case PIX_FMT_GRAY8: - outbuf[2] = 3; /* uncompressed grayscale image */ - outbuf[16] = 8; /* bpp */ - break; - case PIX_FMT_RGB555: - outbuf[2] = 2; /* uncompresses true-color image */ - outbuf[16] = 16; /* bpp */ - break; - case PIX_FMT_BGR24: - outbuf[2] = 2; /* uncompressed true-color image */ - outbuf[16] = 24; /* bpp */ - break; - default: - return -1; - } - bpp = outbuf[16] >> 3; - - out = outbuf + 18; /* skip past the header we just output */ - - /* try RLE compression */ - datasize = targa_encode_rle(out, picsize, p, bpp, avctx->width, avctx->height); - - /* if that worked well, mark the picture as RLE compressed */ - if(datasize >= 0) - outbuf[2] |= 8; - - /* if RLE didn't make it smaller, go back to no compression */ - else datasize = targa_encode_normal(out, p, bpp, avctx->width, avctx->height); - - out += datasize; - - /* The standard recommends including this section, even if we don't use - * any of the features it affords. TODO: take advantage of the pixel - * aspect ratio and encoder ID fields available? */ - memcpy(out, "\0\0\0\0\0\0\0\0TRUEVISION-XFILE.", 26); - - return out + 26 - outbuf; -} - -static int targa_encode_init(AVCodecContext *avctx) -{ - return 0; -} - -AVCodec targa_encoder = { - .name = "targa", - .type = CODEC_TYPE_VIDEO, - .id = CODEC_ID_TARGA, - .priv_data_size = 0, - .init = targa_encode_init, - .encode = targa_encode_frame, - .pix_fmts= (enum PixelFormat[]){PIX_FMT_BGR24, PIX_FMT_RGB555, PIX_FMT_GRAY8, -1}, -}; |