diff options
Diffstat (limited to 'contrib/ffmpeg/libavcodec/rv40.c')
| -rw-r--r-- | contrib/ffmpeg/libavcodec/rv40.c | 279 |
1 files changed, 0 insertions, 279 deletions
diff --git a/contrib/ffmpeg/libavcodec/rv40.c b/contrib/ffmpeg/libavcodec/rv40.c deleted file mode 100644 index f0e0d915f..000000000 --- a/contrib/ffmpeg/libavcodec/rv40.c +++ /dev/null @@ -1,279 +0,0 @@ -/* - * RV40 decoder - * Copyright (c) 2007 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 rv40.c - * RV40 decoder - */ - -#include "avcodec.h" -#include "dsputil.h" -#include "mpegvideo.h" -#include "golomb.h" - -#include "rv34.h" -#include "rv40vlc2.h" -#include "rv40data.h" - -static VLC aic_top_vlc; -static VLC aic_mode1_vlc[AIC_MODE1_NUM], aic_mode2_vlc[AIC_MODE2_NUM]; -static VLC ptype_vlc[NUM_PTYPE_VLCS], btype_vlc[NUM_BTYPE_VLCS]; - -/** - * Initialize all tables. - */ -static void rv40_init_tables() -{ - int i; - - init_vlc(&aic_top_vlc, AIC_TOP_BITS, AIC_TOP_SIZE, - rv40_aic_top_vlc_bits, 1, 1, - rv40_aic_top_vlc_codes, 1, 1, INIT_VLC_USE_STATIC); - for(i = 0; i < AIC_MODE1_NUM; i++){ - // Every tenth VLC table is empty - if((i % 10) == 9) continue; - init_vlc(&aic_mode1_vlc[i], AIC_MODE1_BITS, AIC_MODE1_SIZE, - aic_mode1_vlc_bits[i], 1, 1, - aic_mode1_vlc_codes[i], 1, 1, INIT_VLC_USE_STATIC); - } - for(i = 0; i < AIC_MODE2_NUM; i++){ - init_vlc(&aic_mode2_vlc[i], AIC_MODE2_BITS, AIC_MODE2_SIZE, - aic_mode2_vlc_bits[i], 1, 1, - aic_mode2_vlc_codes[i], 2, 2, INIT_VLC_USE_STATIC); - } - for(i = 0; i < NUM_PTYPE_VLCS; i++) - init_vlc_sparse(&ptype_vlc[i], PTYPE_VLC_BITS, PTYPE_VLC_SIZE, - ptype_vlc_bits[i], 1, 1, - ptype_vlc_codes[i], 1, 1, - ptype_vlc_syms, 1, 1, INIT_VLC_USE_STATIC); - for(i = 0; i < NUM_BTYPE_VLCS; i++) - init_vlc_sparse(&btype_vlc[i], BTYPE_VLC_BITS, BTYPE_VLC_SIZE, - btype_vlc_bits[i], 1, 1, - btype_vlc_codes[i], 1, 1, - btype_vlc_syms, 1, 1, INIT_VLC_USE_STATIC); -} - -/** - * Get stored dimension from bitstream. - * - * If the width/height is the standard one then it's coded as a 3-bit index. - * Otherwise it is coded as escaped 8-bit portions. - */ -static int get_dimension(GetBitContext *gb, const int *dim) -{ - int t = get_bits(gb, 3); - int val = dim[t]; - if(val < 0) - val = dim[get_bits1(gb) - val]; - if(!val){ - do{ - t = get_bits(gb, 8); - val += t << 2; - }while(t == 0xFF); - } - return val; -} - -/** - * Get encoded picture size - usually this is called from rv40_parse_slice_header. - */ -static void rv40_parse_picture_size(GetBitContext *gb, int *w, int *h) -{ - *w = get_dimension(gb, rv40_standard_widths); - *h = get_dimension(gb, rv40_standard_heights); -} - -static int rv40_parse_slice_header(RV34DecContext *r, GetBitContext *gb, SliceInfo *si) -{ - int t, mb_bits; - int w = r->s.width, h = r->s.height; - int mb_size; - - memset(si, 0, sizeof(SliceInfo)); - if(get_bits1(gb)) - return -1; - si->type = get_bits(gb, 2); - if(si->type == 1) si->type = 0; - si->quant = get_bits(gb, 5); - if(get_bits(gb, 2)) - return -1; - si->vlc_set = get_bits(gb, 2); - skip_bits1(gb); - t = get_bits(gb, 13); /// ??? - if(!si->type || !get_bits1(gb)) - rv40_parse_picture_size(gb, &w, &h); - if(avcodec_check_dimensions(r->s.avctx, w, h) < 0) - return -1; - si->width = w; - si->height = h; - mb_size = ((w + 15) >> 4) * ((h + 15) >> 4); - mb_bits = ff_rv34_get_start_offset(gb, mb_size); - si->start = get_bits(gb, mb_bits); - - return 0; -} - -/** - * Decode 4x4 intra types array. - */ -static int rv40_decode_intra_types(RV34DecContext *r, GetBitContext *gb, int8_t *dst) -{ - MpegEncContext *s = &r->s; - int i, j, k, v; - int A, B, C; - int pattern; - int8_t *ptr; - - for(i = 0; i < 4; i++, dst += s->b4_stride){ - if(!i && s->first_slice_line){ - pattern = get_vlc2(gb, aic_top_vlc.table, AIC_TOP_BITS, 1); - dst[0] = (pattern >> 2) & 2; - dst[1] = (pattern >> 1) & 2; - dst[2] = pattern & 2; - dst[3] = (pattern << 1) & 2; - continue; - } - ptr = dst; - for(j = 0; j < 4; j++){ - /* Coefficients are read using VLC chosen by the prediction pattern - * The first one (used for retrieving a pair of coefficients) is - * constructed from the top, top right and left coefficients - * The second one (used for retrieving only one coefficient) is - * top + 10 * left. - */ - A = ptr[-s->b4_stride + 1]; // it won't be used for the last coefficient in a row - B = ptr[-s->b4_stride]; - C = ptr[-1]; - pattern = A + (B << 4) + (C << 8); - for(k = 0; k < MODE2_PATTERNS_NUM; k++) - if(pattern == rv40_aic_table_index[k]) - break; - if(j < 3 && k < MODE2_PATTERNS_NUM){ //pattern is found, decoding 2 coefficients - v = get_vlc2(gb, aic_mode2_vlc[k].table, AIC_MODE2_BITS, 2); - *ptr++ = v/9; - *ptr++ = v%9; - j++; - }else{ - if(B != -1 && C != -1) - v = get_vlc2(gb, aic_mode1_vlc[B + C*10].table, AIC_MODE1_BITS, 1); - else{ // tricky decoding - v = 0; - switch(C){ - case -1: // code 0 -> 1, 1 -> 0 - if(B < 2) - v = get_bits1(gb) ^ 1; - break; - case 0: - case 2: // code 0 -> 2, 1 -> 0 - v = (get_bits1(gb) ^ 1) << 1; - break; - } - } - *ptr++ = v; - } - } - } - return 0; -} - -/** - * Decode macroblock information. - */ -static int rv40_decode_mb_info(RV34DecContext *r) -{ - MpegEncContext *s = &r->s; - GetBitContext *gb = &s->gb; - int q, i; - int prev_type = 0; - int mb_pos = s->mb_x + s->mb_y * s->mb_stride; - int blocks[RV34_MB_TYPES] = {0}; - int count = 0; - - if(!r->s.mb_skip_run) - r->s.mb_skip_run = svq3_get_ue_golomb(gb) + 1; - - if(--r->s.mb_skip_run) - return RV34_MB_SKIP; - - if(r->avail_cache[5-1]) - blocks[r->mb_type[mb_pos - 1]]++; - if(r->avail_cache[5-4]){ - blocks[r->mb_type[mb_pos - s->mb_stride]]++; - if(r->avail_cache[5-2]) - blocks[r->mb_type[mb_pos - s->mb_stride + 1]]++; - if(r->avail_cache[5-5]) - blocks[r->mb_type[mb_pos - s->mb_stride - 1]]++; - } - - for(i = 0; i < RV34_MB_TYPES; i++){ - if(blocks[i] > count){ - count = blocks[i]; - prev_type = i; - } - } - if(s->pict_type == P_TYPE){ - prev_type = block_num_to_ptype_vlc_num[prev_type]; - q = get_vlc2(gb, ptype_vlc[prev_type].table, PTYPE_VLC_BITS, 1); - if(q < PBTYPE_ESCAPE) - return q; - q = get_vlc2(gb, ptype_vlc[prev_type].table, PTYPE_VLC_BITS, 1); - av_log(s->avctx, AV_LOG_ERROR, "Dquant for P-frame\n"); - }else{ - prev_type = block_num_to_btype_vlc_num[prev_type]; - q = get_vlc2(gb, btype_vlc[prev_type].table, BTYPE_VLC_BITS, 1); - if(q < PBTYPE_ESCAPE) - return q; - q = get_vlc2(gb, btype_vlc[prev_type].table, BTYPE_VLC_BITS, 1); - av_log(s->avctx, AV_LOG_ERROR, "Dquant for B-frame\n"); - } - return 0; -} - -/** - * Initialize decoder. - */ -static int rv40_decode_init(AVCodecContext *avctx) -{ - RV34DecContext *r = avctx->priv_data; - - r->rv30 = 0; - ff_rv34_decode_init(avctx); - if(!aic_top_vlc.bits) - rv40_init_tables(); - r->parse_slice_header = rv40_parse_slice_header; - r->decode_intra_types = rv40_decode_intra_types; - r->decode_mb_info = rv40_decode_mb_info; - r->luma_dc_quant_i = rv40_luma_dc_quant[0]; - r->luma_dc_quant_p = rv40_luma_dc_quant[1]; - return 0; -} - -AVCodec rv40_decoder = { - "rv40", - CODEC_TYPE_VIDEO, - CODEC_ID_RV40, - sizeof(RV34DecContext), - rv40_decode_init, - NULL, - ff_rv34_decode_end, - ff_rv34_decode_frame, - CODEC_CAP_DR1 | CODEC_CAP_DELAY, -}; |