diff options
Diffstat (limited to 'contrib/ffmpeg/libavcodec/wnv1.c')
| -rw-r--r-- | contrib/ffmpeg/libavcodec/wnv1.c | 146 |
1 files changed, 0 insertions, 146 deletions
diff --git a/contrib/ffmpeg/libavcodec/wnv1.c b/contrib/ffmpeg/libavcodec/wnv1.c deleted file mode 100644 index 46b31a5c5..000000000 --- a/contrib/ffmpeg/libavcodec/wnv1.c +++ /dev/null @@ -1,146 +0,0 @@ -/* - * Winnov WNV1 codec - * Copyright (c) 2005 Konstantin Shishkov - * - * 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 wnv1.c - * Winnov WNV1 codec. - */ - -#include "avcodec.h" -#include "common.h" -#include "bitstream.h" - - -typedef struct WNV1Context{ - AVCodecContext *avctx; - AVFrame pic; - - int shift; - GetBitContext gb; -} WNV1Context; - -static uint16_t code_tab[16][2]={ -{0x1FD,9}, {0xFD,8}, {0x7D,7}, {0x3D,6}, {0x1D,5}, {0x0D,4}, {0x005,3}, -{0x000,1}, -{0x004,3}, {0x0C,4}, {0x1C,5}, {0x3C,6}, {0x7C,7}, {0xFC,8}, {0x1FC,9}, {0xFF,8} -}; - -#define CODE_VLC_BITS 9 -static VLC code_vlc; - -/* returns modified base_value */ -static inline int wnv1_get_code(WNV1Context *w, int base_value) -{ - int v = get_vlc2(&w->gb, code_vlc.table, CODE_VLC_BITS, 1); - - if(v==15) - return ff_reverse[ get_bits(&w->gb, 8 - w->shift) ]; - else - return base_value + ((v - 7)<<w->shift); -} - -static int decode_frame(AVCodecContext *avctx, - void *data, int *data_size, - uint8_t *buf, int buf_size) -{ - WNV1Context * const l = avctx->priv_data; - AVFrame * const p= (AVFrame*)&l->pic; - unsigned char *Y,*U,*V; - int i, j; - int prev_y = 0, prev_u = 0, prev_v = 0; - - if(p->data[0]) - avctx->release_buffer(avctx, p); - - p->reference = 0; - if(avctx->get_buffer(avctx, p) < 0){ - av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n"); - return -1; - } - p->key_frame = 1; - - for(i=8; i<buf_size; i++) - buf[i]= ff_reverse[ buf[i] ]; //FIXME ensure that the buffer is modifyable or use a temp one - init_get_bits(&l->gb, buf+8, (buf_size-8)*8); - - if (buf[2] >> 4 == 6) - l->shift = 2; - else { - l->shift = 8 - (buf[2] >> 4); - if (l->shift > 4) { - av_log(avctx, AV_LOG_ERROR, "Unknown WNV1 frame header value %i, please upload file for study\n", buf[2] >> 4); - l->shift = 4; - } - if (l->shift < 1) { - av_log(avctx, AV_LOG_ERROR, "Unknown WNV1 frame header value %i, please upload file for study\n", buf[2] >> 4); - l->shift = 1; - } - } - - Y = p->data[0]; - U = p->data[1]; - V = p->data[2]; - for (j = 0; j < avctx->height; j++) { - for (i = 0; i < avctx->width / 2; i++) { - Y[i * 2] = wnv1_get_code(l, prev_y); - prev_u = U[i] = wnv1_get_code(l, prev_u); - prev_y = Y[(i * 2) + 1] = wnv1_get_code(l, Y[i * 2]); - prev_v = V[i] = wnv1_get_code(l, prev_v); - } - Y += p->linesize[0]; - U += p->linesize[1]; - V += p->linesize[2]; - } - - - *data_size = sizeof(AVFrame); - *(AVFrame*)data = l->pic; - - return buf_size; -} - -static int decode_init(AVCodecContext *avctx){ - WNV1Context * const l = avctx->priv_data; - - l->avctx = avctx; - avctx->pix_fmt = PIX_FMT_YUV422P; - - if(!code_vlc.table){ - init_vlc(&code_vlc, CODE_VLC_BITS, 16, - &code_tab[0][1], 4, 2, - &code_tab[0][0], 4, 2, 1); - } - - return 0; -} - -AVCodec wnv1_decoder = { - "wnv1", - CODEC_TYPE_VIDEO, - CODEC_ID_WNV1, - sizeof(WNV1Context), - decode_init, - NULL, - NULL, - decode_frame, - CODEC_CAP_DR1, -}; |