diff options
Diffstat (limited to 'src/libffmpeg/libavcodec/aasc.c')
| -rw-r--r-- | src/libffmpeg/libavcodec/aasc.c | 176 |
1 files changed, 0 insertions, 176 deletions
diff --git a/src/libffmpeg/libavcodec/aasc.c b/src/libffmpeg/libavcodec/aasc.c deleted file mode 100644 index 6c8e3166e..000000000 --- a/src/libffmpeg/libavcodec/aasc.c +++ /dev/null @@ -1,176 +0,0 @@ -/* - * Autodesc RLE Decoder - * Copyright (C) 2005 the ffmpeg project - * - * 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 - */ - -/** - * @file aasc.c - * Autodesc RLE Video Decoder by Konstantin Shishkov - */ - -#include <stdio.h> -#include <stdlib.h> -#include <string.h> - -#include "common.h" -#include "avcodec.h" -#include "dsputil.h" - -typedef struct AascContext { - AVCodecContext *avctx; - AVFrame frame; -} AascContext; - -#define FETCH_NEXT_STREAM_BYTE() \ - if (stream_ptr >= buf_size) \ - { \ - av_log(s->avctx, AV_LOG_ERROR, " AASC: stream ptr just went out of bounds (fetch)\n"); \ - break; \ - } \ - stream_byte = buf[stream_ptr++]; - -static int aasc_decode_init(AVCodecContext *avctx) -{ - AascContext *s = (AascContext *)avctx->priv_data; - - s->avctx = avctx; - - avctx->pix_fmt = PIX_FMT_BGR24; - avctx->has_b_frames = 0; - s->frame.data[0] = NULL; - - return 0; -} - -static int aasc_decode_frame(AVCodecContext *avctx, - void *data, int *data_size, - uint8_t *buf, int buf_size) -{ - AascContext *s = (AascContext *)avctx->priv_data; - int stream_ptr = 4; - unsigned char rle_code; - unsigned char stream_byte; - int pixel_ptr = 0; - int row_dec, row_ptr; - int frame_size; - int i; - - s->frame.reference = 1; - s->frame.buffer_hints = FF_BUFFER_HINTS_VALID | FF_BUFFER_HINTS_PRESERVE | FF_BUFFER_HINTS_REUSABLE; - if (avctx->reget_buffer(avctx, &s->frame)) { - av_log(avctx, AV_LOG_ERROR, "reget_buffer() failed\n"); - return -1; - } - - row_dec = s->frame.linesize[0]; - row_ptr = (s->avctx->height - 1) * row_dec; - frame_size = row_dec * s->avctx->height; - - while (row_ptr >= 0) { - FETCH_NEXT_STREAM_BYTE(); - rle_code = stream_byte; - if (rle_code == 0) { - /* fetch the next byte to see how to handle escape code */ - FETCH_NEXT_STREAM_BYTE(); - if (stream_byte == 0) { - /* line is done, goto the next one */ - row_ptr -= row_dec; - pixel_ptr = 0; - } else if (stream_byte == 1) { - /* decode is done */ - break; - } else if (stream_byte == 2) { - /* reposition frame decode coordinates */ - FETCH_NEXT_STREAM_BYTE(); - pixel_ptr += stream_byte; - FETCH_NEXT_STREAM_BYTE(); - row_ptr -= stream_byte * row_dec; - } else { - /* copy pixels from encoded stream */ - if ((pixel_ptr + stream_byte > avctx->width * 3) || - (row_ptr < 0)) { - av_log(s->avctx, AV_LOG_ERROR, " AASC: frame ptr just went out of bounds (copy1)\n"); - break; - } - - rle_code = stream_byte; - if (stream_ptr + rle_code > buf_size) { - av_log(s->avctx, AV_LOG_ERROR, " AASC: stream ptr just went out of bounds (copy2)\n"); - break; - } - - for (i = 0; i < rle_code; i++) { - FETCH_NEXT_STREAM_BYTE(); - s->frame.data[0][row_ptr + pixel_ptr] = stream_byte; - pixel_ptr++; - } - if (rle_code & 1) - stream_ptr++; - } - } else { - /* decode a run of data */ - if ((pixel_ptr + rle_code > avctx->width * 3) || - (row_ptr < 0)) { - av_log(s->avctx, AV_LOG_ERROR, " AASC: frame ptr just went out of bounds (run1)\n"); - break; - } - - FETCH_NEXT_STREAM_BYTE(); - - while(rle_code--) { - s->frame.data[0][row_ptr + pixel_ptr] = stream_byte; - pixel_ptr++; - } - } - } - - /* one last sanity check on the way out */ - if (stream_ptr < buf_size) - av_log(s->avctx, AV_LOG_ERROR, " AASC: ended frame decode with bytes left over (%d < %d)\n", - stream_ptr, buf_size); - - *data_size = sizeof(AVFrame); - *(AVFrame*)data = s->frame; - - /* report that the buffer was completely consumed */ - return buf_size; -} - -static int aasc_decode_end(AVCodecContext *avctx) -{ - AascContext *s = (AascContext *)avctx->priv_data; - - /* release the last frame */ - if (s->frame.data[0]) - avctx->release_buffer(avctx, &s->frame); - - return 0; -} - -AVCodec aasc_decoder = { - "aasc", - CODEC_TYPE_VIDEO, - CODEC_ID_AASC, - sizeof(AascContext), - aasc_decode_init, - NULL, - aasc_decode_end, - aasc_decode_frame, - CODEC_CAP_DR1, -}; |