diff options
Diffstat (limited to 'contrib/ffmpeg/libavcodec/pcx.c')
| -rw-r--r-- | contrib/ffmpeg/libavcodec/pcx.c | 247 |
1 files changed, 0 insertions, 247 deletions
diff --git a/contrib/ffmpeg/libavcodec/pcx.c b/contrib/ffmpeg/libavcodec/pcx.c deleted file mode 100644 index 5aa7b0846..000000000 --- a/contrib/ffmpeg/libavcodec/pcx.c +++ /dev/null @@ -1,247 +0,0 @@ -/* - * PC Paintbrush PCX (.pcx) image decoder - * Copyright (c) 2007, 2008 Ivo van Poorten - * - * This decoder does not support CGA palettes. I am unable to find samples - * and Netpbm cannot generate them. - * - * 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 "bytestream.h" -#include "bitstream.h" - -typedef struct PCXContext { - AVFrame picture; -} PCXContext; - -static int pcx_init(AVCodecContext *avctx) { - PCXContext *s = avctx->priv_data; - - avcodec_get_frame_defaults(&s->picture); - avctx->coded_frame= &s->picture; - - return 0; -} - -/** - * @return advanced src pointer - */ -static const char *pcx_rle_decode(const uint8_t *src, uint8_t *dst, - unsigned int bytes_per_scanline) { - unsigned int i = 0; - unsigned char run, value; - - while (i<bytes_per_scanline) { - run = 1; - value = *src++; - if (value >= 0xc0) { - run = value & 0x3f; - value = *src++; - } - while (i<bytes_per_scanline && run--) - dst[i++] = value; - } - - return src; -} - -static void pcx_palette(const uint8_t **src, uint32_t *dst, unsigned int pallen) { - unsigned int i; - - for (i=0; i<pallen; i++) - *dst++ = bytestream_get_be24(src); - memset(dst, 0, (256 - pallen) * sizeof(*dst)); -} - -static int pcx_decode_frame(AVCodecContext *avctx, void *data, int *data_size, - const uint8_t *buf, int buf_size) { - PCXContext * const s = avctx->priv_data; - AVFrame *picture = data; - AVFrame * const p = &s->picture; - int xmin, ymin, xmax, ymax; - unsigned int w, h, bits_per_pixel, bytes_per_line, nplanes, stride, y, x, - bytes_per_scanline; - uint8_t *ptr; - uint8_t const *bufstart = buf; - - if (buf[0] != 0x0a || buf[1] > 5 || buf[1] == 1 || buf[2] != 1) { - av_log(avctx, AV_LOG_ERROR, "this is not PCX encoded data\n"); - return -1; - } - - xmin = AV_RL16(buf+ 4); - ymin = AV_RL16(buf+ 6); - xmax = AV_RL16(buf+ 8); - ymax = AV_RL16(buf+10); - - if (xmax < xmin || ymax < ymin) { - av_log(avctx, AV_LOG_ERROR, "invalid image dimensions\n"); - return -1; - } - - w = xmax - xmin + 1; - h = ymax - ymin + 1; - - bits_per_pixel = buf[3]; - bytes_per_line = AV_RL16(buf+66); - nplanes = buf[65]; - bytes_per_scanline = nplanes * bytes_per_line; - - if (bytes_per_scanline < w * bits_per_pixel * nplanes / 8) { - av_log(avctx, AV_LOG_ERROR, "PCX data is corrupted\n"); - return -1; - } - - switch ((nplanes<<8) + bits_per_pixel) { - case 0x0308: - avctx->pix_fmt = PIX_FMT_RGB24; - break; - case 0x0108: - case 0x0104: - case 0x0102: - case 0x0101: - case 0x0401: - case 0x0301: - case 0x0201: - avctx->pix_fmt = PIX_FMT_PAL8; - break; - default: - av_log(avctx, AV_LOG_ERROR, "invalid PCX file\n"); - return -1; - } - - buf += 128; - - if (p->data[0]) - avctx->release_buffer(avctx, p); - - if (avcodec_check_dimensions(avctx, w, h)) - return -1; - if (w != avctx->width || h != avctx->height) - avcodec_set_dimensions(avctx, w, h); - if (avctx->get_buffer(avctx, p) < 0) { - av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n"); - return -1; - } - - p->pict_type = FF_I_TYPE; - - ptr = p->data[0]; - stride = p->linesize[0]; - - if (nplanes == 3 && bits_per_pixel == 8) { - uint8_t scanline[bytes_per_scanline]; - - for (y=0; y<h; y++) { - buf = pcx_rle_decode(buf, scanline, bytes_per_scanline); - - for (x=0; x<w; x++) { - ptr[3*x ] = scanline[x ]; - ptr[3*x+1] = scanline[x+ bytes_per_line ]; - ptr[3*x+2] = scanline[x+(bytes_per_line<<1)]; - } - - ptr += stride; - } - - } else if (nplanes == 1 && bits_per_pixel == 8) { - uint8_t scanline[bytes_per_scanline]; - const uint8_t *palstart = bufstart + buf_size - 769; - - for (y=0; y<h; y++, ptr+=stride) { - buf = pcx_rle_decode(buf, scanline, bytes_per_scanline); - memcpy(ptr, scanline, w); - } - - if (buf != palstart) { - av_log(avctx, AV_LOG_WARNING, "image data possibly corrupted\n"); - buf = palstart; - } - if (*buf++ != 12) { - av_log(avctx, AV_LOG_ERROR, "expected palette after image data\n"); - return -1; - } - - } else if (nplanes == 1) { /* all packed formats, max. 16 colors */ - uint8_t scanline[bytes_per_scanline]; - GetBitContext s; - - for (y=0; y<h; y++) { - init_get_bits(&s, scanline, bytes_per_scanline<<3); - - buf = pcx_rle_decode(buf, scanline, bytes_per_scanline); - - for (x=0; x<w; x++) - ptr[x] = get_bits(&s, bits_per_pixel); - ptr += stride; - } - - } else { /* planar, 4, 8 or 16 colors */ - uint8_t scanline[bytes_per_scanline]; - int i; - - for (y=0; y<h; y++) { - buf = pcx_rle_decode(buf, scanline, bytes_per_scanline); - - for (x=0; x<w; x++) { - int m = 0x80 >> (x&7), v = 0; - for (i=nplanes - 1; i>=0; i--) { - v <<= 1; - v += !!(scanline[i*bytes_per_line + (x>>3)] & m); - } - ptr[x] = v; - } - ptr += stride; - } - } - - if (nplanes == 1 && bits_per_pixel == 8) { - pcx_palette(&buf, (uint32_t *) p->data[1], 256); - } else if (bits_per_pixel < 8) { - const uint8_t *palette = bufstart+16; - pcx_palette(&palette, (uint32_t *) p->data[1], 16); - } - - *picture = s->picture; - *data_size = sizeof(AVFrame); - - return buf - bufstart; -} - -static int pcx_end(AVCodecContext *avctx) { - PCXContext *s = avctx->priv_data; - - if(s->picture.data[0]) - avctx->release_buffer(avctx, &s->picture); - - return 0; -} - -AVCodec pcx_decoder = { - "pcx", - CODEC_TYPE_VIDEO, - CODEC_ID_PCX, - sizeof(PCXContext), - pcx_init, - NULL, - pcx_end, - pcx_decode_frame, - 0, - NULL -}; |