/* * RV30/40 decoder common data * Copyright (c) 2007 Mike Melanson, 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 libavcodec/rv34.c * RV30/40 decoder common data */ #include "avcodec.h" #include "dsputil.h" #include "mpegvideo.h" #include "golomb.h" #include "mathops.h" #include "rectangle.h" #include "rv34vlc.h" #include "rv34data.h" #include "rv34.h" //#define DEBUG /** translation of RV30/40 macroblock types to lavc ones */ static const int rv34_mb_type_to_lavc[12] = { MB_TYPE_INTRA, MB_TYPE_INTRA16x16 | MB_TYPE_SEPARATE_DC, MB_TYPE_16x16 | MB_TYPE_L0, MB_TYPE_8x8 | MB_TYPE_L0, MB_TYPE_16x16 | MB_TYPE_L0, MB_TYPE_16x16 | MB_TYPE_L1, MB_TYPE_SKIP, MB_TYPE_DIRECT2 | MB_TYPE_16x16, MB_TYPE_16x8 | MB_TYPE_L0, MB_TYPE_8x16 | MB_TYPE_L0, MB_TYPE_16x16 | MB_TYPE_L0L1, MB_TYPE_16x16 | MB_TYPE_L0 | MB_TYPE_SEPARATE_DC }; static RV34VLC intra_vlcs[NUM_INTRA_TABLES], inter_vlcs[NUM_INTER_TABLES]; /** * @defgroup vlc RV30/40 VLC generating functions * @{ */ static const int table_offs[] = { 0, 1818, 3622, 4144, 4698, 5234, 5804, 5868, 5900, 5932, 5996, 6252, 6316, 6348, 6380, 7674, 8944, 10274, 11668, 12250, 14060, 15846, 16372, 16962, 17512, 18148, 18180, 18212, 18244, 18308, 18564, 18628, 18660, 18692, 20036, 21314, 22648, 23968, 24614, 26384, 28190, 28736, 29366, 29938, 30608, 30640, 30672, 30704, 30768, 31024, 31088, 31120, 31184, 32570, 33898, 35236, 36644, 37286, 39020, 40802, 41368, 42052, 42692, 43348, 43380, 43412, 43444, 43476, 43604, 43668, 43700, 43732, 45100, 46430, 47778, 49160, 49802, 51550, 53340, 53972, 54648, 55348, 55994, 56122, 56154, 56186, 56218, 56346, 56410, 56442, 56474, 57878, 59290, 60636, 62036, 62682, 64460, 64524, 64588, 64716, 64844, 66076, 67466, 67978, 68542, 69064, 69648, 70296, 72010, 72074, 72138, 72202, 72330, 73572, 74936, 75454, 76030, 76566, 77176, 77822, 79582, 79646, 79678, 79742, 79870, 81180, 82536, 83064, 83672, 84242, 84934, 85576, 87384, 87448, 87480, 87544, 87672, 88982, 90340, 90902, 91598, 92182, 92846, 93488, 95246, 95278, 95310, 95374, 95502, 96878, 98266, 98848, 99542, 100234, 100884, 101524, 103320, 103352, 103384, 103416, 103480, 104874, 106222, 106910, 107584, 108258, 108902, 109544, 111366, 111398, 111430, 111462, 111494, 112878, 114320, 114988, 115660, 116310, 116950, 117592 }; static VLC_TYPE table_data[117592][2]; /** * Generate VLC from codeword lengths. * @param bits codeword lengths (zeroes are accepted) * @param size length of input data * @param vlc output VLC * @param insyms symbols for input codes (NULL for default ones) * @param num VLC table number (for static initialization) */ static void rv34_gen_vlc(const uint8_t *bits, int size, VLC *vlc, const uint8_t *insyms, const int num) { int i; int counts[17] = {0}, codes[17]; uint16_t cw[size], syms[size]; uint8_t bits2[size]; int maxbits = 0, realsize = 0; for(i = 0; i < size; i++){ if(bits[i]){ bits2[realsize] = bits[i]; syms[realsize] = insyms ? insyms[i] : i; realsize++; maxbits = FFMAX(maxbits, bits[i]); counts[bits[i]]++; } } codes[0] = 0; for(i = 0; i < 16; i++) codes[i+1] = (codes[i] + counts[i]) << 1; for(i = 0; i < realsize; i++) cw[i] = codes[bits2[i]]++; vlc->table = &table_data[table_offs[num]]; vlc->table_allocated = table_offs[num + 1] - table_offs[num]; init_vlc_sparse(vlc, FFMIN(maxbits, 9), realsize, bits2, 1, 1, cw, 2, 2, syms, 2, 2, INIT_VLC_USE_NEW_STATIC); } /** * Initialize all tables. */ static av_cold void rv34_init_tables(void) { int i, j, k; for(i = 0; i < NUM_INTRA_TABLES; i++){ for(j = 0; j < 2; j++){ rv34_gen_vlc(rv34_table_intra_cbppat [i][j], CBPPAT_VLC_SIZE, &intra_vlcs[i].cbppattern[j], NULL, 19*i + 0 + j); rv34_gen_vlc(rv34_table_intra_secondpat[i][j], OTHERBLK_VLC_SIZE, &intra_vlcs[i].second_pattern[j], NULL, 19*i + 2 + j); rv34_gen_vlc(rv34_table_intra_thirdpat [i][j], OTHERBLK_VLC_SIZE, &intra_vlcs[i].third_pattern[j], NULL, 19*i + 4 + j); for(k = 0; k < 4; k++){ rv34_gen_vlc(rv34_table_intra_cbp[i][j+k*2], CBP_VLC_SIZE, &intra_vlcs[i].cbp[j][k], rv34_cbp_code, 19*i + 6 + j*4 + k); } } for(j = 0; j < 4; j++){ rv34_gen_vlc(rv34_table_intra_firstpat[i][j], FIRSTBLK_VLC_SIZE, &intra_vlcs[i].first_pattern[j], NULL, 19*i + 14 + j); } rv34_gen_vlc(rv34_intra_coeff[i], COEFF_VLC_SIZE, &intra_vlcs[i].coefficient, NULL, 19*i + 18); } for(i = 0; i < NUM_INTER_TABLES; i++){ rv34_gen_vlc(rv34_inter_cbppat[i], CBPPAT_VLC_SIZE, &inter_vlcs[i].cbppattern[0], NULL, i*12 + 95); for(j = 0; j < 4; j++){ rv34_gen_vlc(rv34_inter_cbp[i][j], CBP_VLC_SIZE, &inter_vlcs[i].cbp[0][j], rv34_cbp_code, i*12 + 96 + j); } for(j = 0; j < 2; j++){ rv34_gen_vlc(rv34_table_inter_firstpat [i][j], FIRSTBLK_VLC_SIZE, &inter_vlcs[i].first_pattern[j], NULL, i*12 + 100 + j); rv34_gen_vlc(rv34_table_inter_secondpat[i][j], OTHERBLK_VLC_SIZE, &inter_vlcs[i].second_pattern[j], NULL, i*12 + 102 + j); rv34_gen_vlc(rv34_table_inter_thirdpat [i][j], OTHERBLK_VLC_SIZE, &inter_vlcs[i].third_pattern[j], NULL, i*12 + 104 + j); } rv34_gen_vlc(rv34_inter_coeff[i], COEFF_VLC_SIZE, &inter_vlcs[i].coefficient, NULL, i*12 + 106); } } /** @} */ // vlc group /** * @defgroup transform RV30/40 inverse transform functions * @{ */ static av_always_inline void rv34_row_transform(int temp[16], DCTELEM *block) { int i; for(i=0; i<4; i++){ const int z0= 13*(block[i+8*0] + block[i+8*2]); const int z1= 13*(block[i+8*0] - block[i+8*2]); const int z2= 7* block[i+8*1] - 17*block[i+8*3]; const int z3= 17* block[i+8*1] + 7*block[i+8*3]; temp[4*i+0]= z0+z3; temp[4*i+1]= z1+z2; temp[4*i+2]= z1-z2; temp[4*i+3]= z0-z3; } } /** * Real Video 3.0/4.0 inverse transform * Code is almost the same as in SVQ3, only scaling is different. */ static void rv34_inv_transform(DCTELEM *block){ int temp[16]; int i; rv34_row_transform(temp, block); for(i=0; i<4; i++){ const int z0= 13*(temp[4*0+i] + temp[4*2+i]) + 0x200; const int z1= 13*(temp[4*0+i] - temp[4*2+i]) + 0x200; const int z2= 7* temp[4*1+i] - 17*temp[4*3+i]; const int z3= 17* temp[4*1+i] + 7*temp[4*3+i]; block[i*8+0]= (z0 + z3)>>10; block[i*8+1]= (z1 + z2)>>10; block[i*8+2]= (z1 - z2)>>10; block[i*8+3]= (z0 - z3)>>10; } } /** * RealVideo 3.0/4.0 inverse transform for DC block * * Code is almost the same as rv34_inv_transform() * but final coefficients are multiplied by 1.5 and have no rounding. */ static void rv34_inv_transform_noround(DCTELEM *block){ int temp[16]; int i; rv34_row_transform(temp, block); for(i=0; i<4; i++){ const int z0= 13*(temp[4*0+i] + temp[4*2+i]); const int z1= 13*(temp[4*0+i] - temp[4*2+i]); const int z2= 7* temp[4*1+i] - 17*temp[4*3+i]; const int z3= 17* temp[4*1+i] + 7*temp[4*3+i]; block[i*8+0]= ((z0 + z3)*3)>>11; block[i*8+1]= ((z1 + z2)*3)>>11; block[i*8+2]= ((z1 - z2)*3)>>11; block[i*8+3]= ((z0 - z3)*3)>>11; } } /** @} */ // transform /** * @defgroup block RV30/40 4x4 block decoding functions * @{ */ /** * Decode coded block pattern. */ static int rv34_decode_cbp(GetBitContext *gb, RV34VLC *vlc, int table) { int pattern, code, cbp=0; int ones; static const int cbp_masks[3] = {0x100000, 0x010000, 0x110000}; static const int shifts[4] = { 0, 2, 8, 10 }; const int *curshift = shifts; int i, t, mask; code = get_vlc2(gb, vlc->cbppattern[table].table, 9, 2); pattern = code & 0xF; code >>= 4; ones = rv34_count_ones[pattern]; for(mask = 8; mask; mask >>= 1, curshift++){ if(pattern & mask) cbp |= get_vlc2(gb, vlc->cbp[table][ones].table, vlc->cbp[table][ones].bits, 1) << curshift[0]; } for(i = 0; i < 4; i++){ t = modulo_three_table[code][i]; if(t == 1) cbp |= cbp_masks[get_bits1(gb)] << i; if(t == 2) cbp |= cbp_masks[2] << i; } return cbp; } /** * Get one coefficient value from the bistream and store it. */ static inline void decode_coeff(DCTELEM *dst, int coef, int esc, GetBitContext *gb, VLC* vlc) { if(coef){ if(coef == esc){ coef = get_vlc2(gb, vlc->table, 9, 2); if(coef > 23){ coef -= 23; coef = 22 + ((1 << coef) | get_bits(gb, coef)); } coef += esc; } if(get_bits1(gb)) coef = -coef; *dst = coef; } } /** * Decode 2x2 subblock of coefficients. */ static inline void decode_subblock(DCTELEM *dst, int code, const int is_block2, GetBitContext *gb, VLC *vlc) { int coeffs[4]; coeffs[0] = modulo_three_table[code][0]; coeffs[1] = modulo_three_table[code][1]; coeffs[2] = modulo_three_table[code][2]; coeffs[3] = modulo_three_table[code][3]; decode_coeff(dst , coeffs[0], 3, gb, vlc); if(is_block2){ decode_coeff(dst+8, coeffs[1], 2, gb, vlc); decode_coeff(dst+1, coeffs[2], 2, gb, vlc); }else{ decode_coeff(dst+1, coeffs[1], 2, gb, vlc); decode_coeff(dst+8, coeffs[2], 2, gb, vlc); } decode_coeff(dst+9, coeffs[3], 2, gb, vlc); } /** * Decode coefficients for 4x4 block. * * This is done by filling 2x2 subblocks with decoded coefficients * in this order (the same for subblocks and subblock coefficients): * o--o * / * / * o--o */ static inline void rv34_decode_block(DCTELEM *dst, GetBitContext *gb, RV34VLC *rvlc, int fc, int sc) { int code, pattern; code = get_vlc2(gb, rvlc->first_pattern[fc].table, 9, 2); pattern = code & 0x7; code >>= 3; decode_subblock(dst, code, 0, gb, &rvlc->coefficient); if(pattern & 4){ code = get_vlc2(gb, rvlc->second_pattern[sc].table, 9, 2); decode_subblock(dst + 2, code, 0, gb, &rvlc->coefficient); } if(pattern & 2){ // Looks like coefficients 1 and 2 are swapped for this block code = get_vlc2(gb, rvlc->second_pattern[sc].table, 9, 2); decode_subblock(dst + 8*2, code, 1, gb, &rvlc->coefficient); } if(pattern & 1){ code = get_vlc2(gb, rvlc->third_pattern[sc].table, 9, 2); decode_subblock(dst + 8*2+2, code, 0, gb, &rvlc->coefficient); } } /** * Dequantize ordinary 4x4 block. * @todo optimize */ static inline void rv34_dequant4x4(DCTELEM *block, int Qdc, int Q) { int i, j; block[0] = (block[0] * Qdc + 8) >> 4; for(i = 0; i < 4; i++) for(j = !i; j < 4; j++) block[j + i*8] = (block[j + i*8] * Q + 8) >> 4; } /** * Dequantize 4x4 block of DC values for 16x16 macroblock. * @todo optimize */ static inline void rv34_dequant4x4_16x16(DCTELEM *block, int Qdc, int Q) { int i; for(i = 0; i < 3; i++) block[rv34_dezigzag[i]] = (block[rv34_dezigzag[i]] * Qdc + 8) >> 4; for(; i < 16; i++) block[rv34_dezigzag[i]] = (block[rv34_dezigzag[i]] * Q + 8) >> 4; } /** @} */ //block functions /** * @defgroup bitstream RV30/40 bitstream parsing * @{ */ /** * Decode starting slice position. * @todo Maybe replace with ff_h263_decode_mba() ? */ int ff_rv34_get_start_offset(GetBitContext *gb, int mb_size) { int i; for(i = 0; i < 5; i++) if(rv34_mb_max_sizes[i] >= mb_size - 1) break; return rv34_mb_bits_sizes[i]; } /** * Select VLC set for decoding from current quantizer, modifier and frame type. */ static inline RV34VLC* choose_vlc_set(int quant, int mod, int type) { if(mod == 2 && quant < 19) quant += 10; else if(mod && quant < 26) quant += 5; return type ? &inter_vlcs[rv34_quant_to_vlc_set[1][av_clip(quant, 0, 30)]] : &intra_vlcs[rv34_quant_to_vlc_set[0][av_clip(quant, 0, 30)]]; } /** * Decode quantizer difference and return modified quantizer. */ static inline int rv34_decode_dquant(GetBitContext *gb, int quant) { if(get_bits1(gb)) return rv34_dquant_tab[get_bits1(gb)][quant]; else return get_bits(gb, 5); } /** @} */ //bitstream functions /** * @defgroup mv motion vector related code (prediction, reconstruction, motion compensation) * @{ */ /** macroblock partition width in 8x8 blocks */ static const uint8_t part_sizes_w[RV34_MB_TYPES] = { 2, 2, 2, 1, 2, 2, 2, 2, 2, 1, 2, 2 }; /** macroblock partition height in 8x8 blocks */ static const uint8_t part_sizes_h[RV34_MB_TYPES] = { 2, 2, 2, 1, 2, 2, 2, 2, 1, 2, 2, 2 }; /** availability index for subblocks */ static const uint8_t avail_indexes[4] = { 6, 7, 10, 11 }; /** * motion vector prediction * * Motion prediction performed for the block by using median prediction of * motion vectors from the left, top and right top blocks but in corner cases * some other vectors may be used instead. */ static void rv34_pred_mv(RV34DecContext *r, int block_type, int subblock_no, int dmv_no) { MpegEncContext *s = &r->s; int mv_pos = s->mb_x * 2 + s->mb_y * 2 * s->b8_stride; int A[2] = {0}, B[2], C[2]; int i, j; int mx, my; int avail_index = avail_indexes[subblock_no]; int c_off = part_sizes_w[block_type]; mv_pos += (subblock_no & 1) + (subblock_no >> 1)*s->b8_stride; if(subblock_no == 3) c_off = -1; if(r->avail_cache[avail_index - 1]){ A[0] = s->current_picture_ptr->motion_val[0][mv_pos-1][0]; A[1] = s->current_picture_ptr->motion_val[0][mv_pos-1][1]; } if(r->avail_cache[avail_index - 4]){ B[0] = s->current_picture_ptr->motion_val[0][mv_pos-s->b8_stride][0]; B[1] = s->current_picture_ptr->motion_val[0][mv_pos-s->b8_stride][1]; }else{ B[0] = A[0]; B[1] = A[1]; } if(!r->avail_cache[avail_index - 4 + c_off]){ if(r->avail_cache[avail_index - 4] && (r->avail_cache[avail_index - 1] || r->rv30)){ C[0] = s->current_picture_ptr->motion_val[0][mv_pos-s->b8_stride-1][0]; C[1] = s->current_picture_ptr->motion_val[0][mv_pos-s->b8_stride-1][1]; }else{ C[0] = A[0]; C[1] = A[1]; } }else{ C[0] = s->current_picture_ptr->motion_val[0][mv_pos-s->b8_stride+c_off][0]; C[1] = s->current_picture_ptr->motion_val[0][mv_pos-s->b8_stride+c_off][1]; } mx = mid_pred(A[0], B[0], C[0]); my = mid_pred(A[1], B[1], C[1]); mx += r->dmv[dmv_no][0]; my += r->dmv[dmv_no][1]; for(j = 0; j < part_sizes_h[block_type]; j++){ for(i = 0; i < part_sizes_w[block_type]; i++){ s->current_picture_ptr->motion_val[0][mv_pos + i + j*s->b8_stride][0] = mx; s->current_picture_ptr->motion_val[0][mv_pos + i + j*s->b8_stride][1] = my; } } } #define GET_PTS_DIFF(a, b) ((a - b + 8192) & 0x1FFF) /** * Calculate motion vector component that should be added for direct blocks. */ static int calc_add_mv(RV34DecContext *r, int dir, int val) { int refdist = GET_PTS_DIFF(r->next_pts, r->last_pts); int dist = dir ? -GET_PTS_DIFF(r->next_pts, r->cur_pts) : GET_PTS_DIFF(r->cur_pts, r->last_pts); int mul; if(!refdist) return 0; mul = (dist << 14) / refdist; return (val * mul + 0x2000) >> 14; } /** * Predict motion vector for B-frame macroblock. */ static inline void rv34_pred_b_vector(int A[2], int B[2], int C[2], int A_avail, int B_avail, int C_avail, int *mx, int *my) { if(A_avail + B_avail + C_avail != 3){ *mx = A[0] + B[0] + C[0]; *my = A[1] + B[1] + C[1]; if(A_avail + B_avail + C_avail == 2){ *mx /= 2; *my /= 2; } }else{ *mx = mid_pred(A[0], B[0], C[0]); *my = mid_pred(A[1], B[1], C[1]); } } /** * motion vector prediction for B-frames */ static void rv34_pred_mv_b(RV34DecContext *r, int block_type, int dir) { MpegEncContext *s = &r->s; int mb_pos = s->mb_x + s->mb_y * s->mb_stride; int mv_pos = s->mb_x * 2 + s->mb_y * 2 * s->b8_stride; int A[2], B[2], C[2]; int has_A = 0, has_B = 0, has_C = 0; int mx, my; int i, j; Picture *cur_pic = s->current_picture_ptr; const int mask = dir ? MB_TYPE_L1 : MB_TYPE_L0; int type = cur_pic->mb_type[mb_pos]; memset(A, 0, sizeof(A)); memset(B, 0, sizeof(B)); memset(C, 0, sizeof(C)); if((r->avail_cache[6-1] & type) & mask){ A[0] = cur_pic->motion_val[dir][mv_pos - 1][0]; A[1] = cur_pic->motion_val[dir][mv_pos - 1][1]; has_A = 1; } if((r->avail_cache[6-4] & type) & mask){ B[0] = cur_pic->motion_val[dir][mv_pos - s->b8_stride][0]; B[1] = cur_pic->motion_val[dir][mv_pos - s->b8_stride][1]; has_B = 1; } if(r->avail_cache[6-4] && (r->avail_cache[6-2] & type) & mask){ C[0] = cur_pic->motion_val[dir][mv_pos - s->b8_stride + 2][0]; C[1] = cur_pic->motion_val[dir][mv_pos - s->b8_stride + 2][1]; has_C = 1; }else if((s->mb_x+1) == s->mb_width && (r->avail_cache[6-5] & type) & mask){ C[0] = cur_pic->motion_val[dir][mv_pos - s->b8_stride - 1][0]; C[1] = cur_pic->motion_val[dir][mv_pos - s->b8_stride - 1][1]; has_C = 1; } rv34_pred_b_vector(A, B, C, has_A, has_B, has_C, &mx, &my); mx += r->dmv[dir][0]; my += r->dmv[dir][1]; for(j = 0; j < 2; j++){ for(i = 0; i < 2; i++){ cur_pic->motion_val[dir][mv_pos + i + j*s->b8_stride][0] = mx; cur_pic->motion_val[dir][mv_pos + i + j*s->b8_stride][1] = my; } } if(block_type == RV34_MB_B_BACKWARD || block_type == RV34_MB_B_FORWARD) fill_rectangle(cur_pic->motion_val[!dir][mv_pos], 2, 2, s->b8_stride, 0, 4); } /** * motion vector prediction - RV3 version */ static void rv34_pred_mv_rv3(RV34DecContext *r, int block_type, int dir) { MpegEncContext *s = &r->s; int mv_pos = s->mb_x * 2 + s->mb_y * 2 * s->b8_stride; int A[2] = {0}, B[2], C[2]; int i, j, k; int mx, my; int avail_index = avail_indexes[0]; if(r->avail_cache[avail_index - 1]){ A[0] = s->current_picture_ptr->motion_val[0][mv_pos-1][0]; A[1] = s->current_picture_ptr->motion_val[0][mv_pos-1][1]; } if(r->avail_cache[avail_index - 4]){ B[0] = s->current_picture_ptr->motion_val[0][mv_pos-s->b8_stride][0]; B[1] = s->current_picture_ptr->motion_val[0][mv_pos-s->b8_stride][1]; }else{ B[0] = A[0]; B[1] = A[1]; } if(!r->avail_cache[avail_index - 4 + 2]){ if(r->avail_cache[avail_index - 4] && (r->avail_cache[avail_index - 1])){ C[0] = s->current_picture_ptr->motion_val[0][mv_pos-s->b8_stride-1][0]; C[1] = s->current_picture_ptr->motion_val[0][mv_pos-s->b8_stride-1][1]; }else{ C[0] = A[0]; C[1] = A[1]; } }else{ C[0] = s->current_picture_ptr->motion_val[0][mv_pos-s->b8_stride+2][0]; C[1] = s->current_picture_ptr->motion_val[0][mv_pos-s->b8_stride+2][1]; } mx = mid_pred(A[0], B[0], C[0]); my = mid_pred(A[1], B[1], C[1]); mx += r->dmv[0][0]; my += r->dmv[0][1]; for(j = 0; j < 2; j++){ for(i = 0; i < 2; i++){ for(k = 0; k < 2; k++){ s->current_picture_ptr->motion_val[k][mv_pos + i + j*s->b8_stride][0] = mx; s->current_picture_ptr->motion_val[k][mv_pos + i + j*s->b8_stride][1] = my; } } } } static const int chroma_coeffs[3] = { 0, 3, 5 }; /** * generic motion compensation function * * @param r decoder context * @param block_type type of the current block * @param xoff horizontal offset from the start of the current block * @param yoff vertical offset from the start of the current block * @param mv_off offset to the motion vector information * @param width width of the current partition in 8x8 blocks * @param height height of the current partition in 8x8 blocks * @param dir motion compensation direction (i.e. from the last or the next reference frame) * @param thirdpel motion vectors are specified in 1/3 of pixel * @param qpel_mc a set of functions used to perform luma motion compensation * @param chroma_mc a set of functions used to perform chroma motion compensation */ static inline void rv34_mc(RV34DecContext *r, const int block_type, const int xoff, const int yoff, int mv_off, const int width, const int height, int dir, const int thirdpel, qpel_mc_func (*qpel_mc)[16], h264_chroma_mc_func (*chroma_mc)) { MpegEncContext *s = &r->s; uint8_t *Y, *U, *V, *srcY, *srcU, *srcV; int dxy, mx, my, umx, umy, lx, ly, uvmx, uvmy, src_x, src_y, uvsrc_x, uvsrc_y; int mv_pos = s->mb_x * 2 + s->mb_y * 2 * s->b8_stride + mv_off; int is16x16 = 1; if(thirdpel){ int chroma_mx, chroma_my; mx = (s->current_picture_ptr->motion_val[dir][mv_pos][0] + (3 << 24)) / 3 - (1 << 24); my = (s->current_picture_ptr->motion_val[dir][mv_pos][1] + (3 << 24)) / 3 - (1 << 24); lx = (s->current_picture_ptr->motion_val[dir][mv_pos][0] + (3 << 24)) % 3; ly = (s->current_picture_ptr->motion_val[dir][mv_pos][1] + (3 << 24)) % 3; chroma_mx = (s->current_picture_ptr->motion_val[dir][mv_pos][0] + 1) >> 1; chroma_my = (s->current_picture_ptr->motion_val[dir][mv_pos][1] + 1) >> 1; umx = (chroma_mx + (3 << 24)) / 3 - (1 << 24); umy = (chroma_my + (3 << 24)) / 3 - (1 << 24); uvmx = chroma_coeffs[(chroma_mx + (3 << 24)) % 3]; uvmy = chroma_coeffs[(chroma_my + (3 << 24)) % 3]; }else{ int cx, cy; mx = s->current_picture_ptr->motion_val[dir][mv_pos][0] >> 2; my = s->current_picture_ptr->motion_val[dir][mv_pos][1] >> 2; lx = s->current_picture_ptr->motion_val[dir][mv_pos][0] & 3; ly = s->current_picture_ptr->motion_val[dir][mv_pos][1] & 3; cx = s->current_picture_ptr->motion_val[dir][mv_pos][0] / 2; cy = s->current_picture_ptr->motion_val[dir][mv_pos][1] / 2; umx = cx >> 2; umy = cy >> 2; uvmx = (cx & 3) << 1; uvmy = (cy & 3) << 1; //due to some flaw RV40 uses the same MC compensation routine for H2V2 and H3V3 if(uvmx == 6 && uvmy == 6) uvmx = uvmy = 4; } dxy = ly*4 + lx; srcY = dir ? s->next_picture_ptr->data[0] : s->last_picture_ptr->data[0]; srcU = dir ? s->next_picture_ptr->data[1] : s->last_picture_ptr->data[1]; srcV = dir ? s->next_picture_ptr->data[2] : s->last_picture_ptr->data[2]; src_x = s->mb_x * 16 + xoff + mx; src_y = s->mb_y * 16 + yoff + my; uvsrc_x = s->mb_x * 8 + (xoff >> 1) + umx; uvsrc_y = s->mb_y * 8 + (yoff >> 1) + umy; srcY += src_y * s->linesize + src_x; srcU += uvsrc_y * s->uvlinesize + uvsrc_x; srcV += uvsrc_y * s->uvlinesize + uvsrc_x; if( (unsigned)(src_x - !!lx*2) > s->h_edge_pos - !!lx*2 - (width <<3) - 4 || (unsigned)(src_y - !!ly*2) > s->v_edge_pos - !!ly*2 - (height<<3) - 4){ uint8_t *uvbuf= s->edge_emu_buffer + 22 * s->linesize; srcY -= 2 + 2*s->linesize; ff_emulated_edge_mc(s->edge_emu_buffer, srcY, s->linesize, (width<<3)+6, (height<<3)+6, src_x - 2, src_y - 2, s->h_edge_pos, s->v_edge_pos); srcY = s->edge_emu_buffer + 2 + 2*s->linesize; ff_emulated_edge_mc(uvbuf , srcU, s->uvlinesize, (width<<2)+1, (height<<2)+1, uvsrc_x, uvsrc_y, s->h_edge_pos >> 1, s->v_edge_pos >> 1); ff_emulated_edge_mc(uvbuf + 16, srcV, s->uvlinesize, (width<<2)+1, (height<<2)+1, uvsrc_x, uvsrc_y, s->h_edge_pos >> 1, s->v_edge_pos >> 1); srcU = uvbuf; srcV = uvbuf + 16; } Y = s->dest[0] + xoff + yoff *s->linesize; U = s->dest[1] + (xoff>>1) + (yoff>>1)*s->uvlinesize; V = s->dest[2] + (xoff>>1) + (yoff>>1)*s->uvlinesize; if(block_type == RV34_MB_P_16x8){ qpel_mc[1][dxy](Y, srcY, s->linesize); Y += 8; srcY += 8; }else if(block_type == RV34_MB_P_8x16){ qpel_mc[1][dxy](Y, srcY, s->linesize); Y += 8 * s->linesize; srcY += 8 * s->linesize; } is16x16 = (block_type != RV34_MB_P_8x8) && (block_type != RV34_MB_P_16x8) && (block_type != RV34_MB_P_8x16); qpel_mc[!is16x16][dxy](Y, srcY, s->linesize); chroma_mc[2-width] (U, srcU, s->uvlinesize, height*4, uvmx, uvmy); chroma_mc[2-width] (V, srcV, s->uvlinesize, height*4, uvmx, uvmy); } static void rv34_mc_1mv(RV34DecContext *r, const int block_type, const int xoff, const int yoff, int mv_off, const int width, const int height, int dir) { rv34_mc(r, block_type, xoff, yoff, mv_off, width, height, dir, r->rv30, r->rv30 ? r->s.dsp.put_rv30_tpel_pixels_tab : r->s.dsp.put_rv40_qpel_pixels_tab, r->rv30 ? r->s.dsp.put_h264_chroma_pixels_tab : r->s.dsp.put_rv40_chroma_pixels_tab); } static void rv34_mc_2mv(RV34DecContext *r, const int block_type) { rv34_mc(r, block_type, 0, 0, 0, 2, 2, 0, r->rv30, r->rv30 ? r->s.dsp.put_rv30_tpel_pixels_tab : r->s.dsp.put_rv40_qpel_pixels_tab, r->rv30 ? r->s.dsp.put_h264_chroma_pixels_tab : r->s.dsp.put_rv40_chroma_pixels_tab); rv34_mc(r, block_type, 0, 0, 0, 2, 2, 1, r->rv30, r->rv30 ? r->s.dsp.avg_rv30_tpel_pixels_tab : r->s.dsp.avg_rv40_qpel_pixels_tab, r->rv30 ? r->s.dsp.avg_h264_chroma_pixels_tab : r->s.dsp.avg_rv40_chroma_pixels_tab); } static void rv34_mc_2mv_skip(RV34DecContext *r) { int i, j; for(j = 0; j < 2; j++) for(i = 0; i < 2; i++){ rv34_mc(r, RV34_MB_P_8x8, i*8, j*8, i+j*r->s.b8_stride, 1, 1, 0, r->rv30, r->rv30 ? r->s.dsp.put_rv30_tpel_pixels_tab : r->s.dsp.put_rv40_qpel_pixels_tab, r->rv30 ? r->s.dsp.put_h264_chroma_pixels_tab : r->s.dsp.put_rv40_chroma_pixels_tab); rv34_mc(r, RV34_MB_P_8x8, i*8, j*8, i+j*r->s.b8_stride, 1, 1, 1, r->rv30, r->rv30 ? r->s.dsp.avg_rv30_tpel_pixels_tab : r->s.dsp.avg_rv40_qpel_pixels_tab, r->rv30 ? r->s.dsp.avg_h264_chroma_pixels_tab : r->s.dsp.avg_rv40_chroma_pixels_tab); } } /** number of motion vectors in each macroblock type */ static const int num_mvs[RV34_MB_TYPES] = { 0, 0, 1, 4, 1, 1, 0, 0, 2, 2, 2, 1 }; /** * Decode motion vector differences * and perform motion vector reconstruction and motion compensation. */ static int rv34_decode_mv(RV34DecContext *r, int block_type) { MpegEncContext *s = &r->s; GetBitContext *gb = &s->gb; int i, j, k, l; int mv_pos = s->mb_x * 2 + s->mb_y * 2 * s->b8_stride; int next_bt; memset(r->dmv, 0, sizeof(r->dmv)); for(i = 0; i < num_mvs[block_type]; i++){ r->dmv[i][0] = svq3_get_se_golomb(gb); r->dmv[i][1] = svq3_get_se_golomb(gb); } switch(block_type){ case RV34_MB_TYPE_INTRA: case RV34_MB_TYPE_INTRA16x16: fill_rectangle(s->current_picture_ptr->motion_val[0][s->mb_x * 2 + s->mb_y * 2 * s->b8_stride], 2, 2, s->b8_stride, 0, 4); return 0; case RV34_MB_SKIP: if(s->pict_type == FF_P_TYPE){ fill_rectangle(s->current_picture_ptr->motion_val[0][s->mb_x * 2 + s->mb_y * 2 * s->b8_stride], 2, 2, s->b8_stride, 0, 4); rv34_mc_1mv (r, block_type, 0, 0, 0, 2, 2, 0); break; } case RV34_MB_B_DIRECT: //surprisingly, it uses motion scheme from next reference frame next_bt = s->next_picture_ptr->mb_type[s->mb_x + s->mb_y * s->mb_stride]; if(IS_INTRA(next_bt) || IS_SKIP(next_bt)){ fill_rectangle(s->current_picture_ptr->motion_val[0][s->mb_x * 2 + s->mb_y * 2 * s->b8_stride], 2, 2, s->b8_stride, 0, 4); fill_rectangle(s->current_picture_ptr->motion_val[1][s->mb_x * 2 + s->mb_y * 2 * s->b8_stride], 2, 2, s->b8_stride, 0, 4); }else for(j = 0; j < 2; j++) for(i = 0; i < 2; i++) for(k = 0; k < 2; k++) for(l = 0; l < 2; l++) s->current_picture_ptr->motion_val[l][mv_pos + i + j*s->b8_stride][k] = calc_add_mv(r, l, s->next_picture_ptr->motion_val[0][mv_pos + i + j*s->b8_stride][k]); if(!(IS_16X8(next_bt) || IS_8X16(next_bt) || IS_8X8(next_bt))) //we can use whole macroblock MC rv34_mc_2mv(r, block_type); else rv34_mc_2mv_skip(r); fill_rectangle(s->current_picture_ptr->motion_val[0][s->mb_x * 2 + s->mb_y * 2 * s->b8_stride], 2, 2, s->b8_stride, 0, 4); break; case RV34_MB_P_16x16: case RV34_MB_P_MIX16x16: rv34_pred_mv(r, block_type, 0, 0); rv34_mc_1mv (r, block_type, 0, 0, 0, 2, 2, 0); break; case RV34_MB_B_FORWARD: case RV34_MB_B_BACKWARD: r->dmv[1][0] = r->dmv[0][0]; r->dmv[1][1] = r->dmv[0][1]; if(r->rv30) rv34_pred_mv_rv3(r, block_type, block_type == RV34_MB_B_BACKWARD); else rv34_pred_mv_b (r, block_type, block_type == RV34_MB_B_BACKWARD); rv34_mc_1mv (r, block_type, 0, 0, 0, 2, 2, block_type == RV34_MB_B_BACKWARD); break; case RV34_MB_P_16x8: case RV34_MB_P_8x16: rv34_pred_mv(r, block_type, 0, 0); rv34_pred_mv(r, block_type, 1 + (block_type == RV34_MB_P_16x8), 1); if(block_type == RV34_MB_P_16x8){ rv34_mc_1mv(r, block_type, 0, 0, 0, 2, 1, 0); rv34_mc_1mv(r, block_type, 0, 8, s->b8_stride, 2, 1, 0); } if(block_type == RV34_MB_P_8x16){ rv34_mc_1mv(r, block_type, 0, 0, 0, 1, 2, 0); rv34_mc_1mv(r, block_type, 8, 0, 1, 1, 2, 0); } break; case RV34_MB_B_BIDIR: rv34_pred_mv_b (r, block_type, 0); rv34_pred_mv_b (r, block_type, 1); rv34_mc_2mv (r, block_type); break; case RV34_MB_P_8x8: for(i=0;i< 4;i++){ rv34_pred_mv(r, block_type, i, i); rv34_mc_1mv (r, block_type, (i&1)<<3, (i&2)<<2, (i&1)+(i>>1)*s->b8_stride, 1, 1, 0); } break; } return 0; } /** @} */ // mv group /** * @defgroup recons Macroblock reconstruction functions * @{ */ /** mapping of RV30/40 intra prediction types to standard H.264 types */ static const int ittrans[9] = { DC_PRED, VERT_PRED, HOR_PRED, DIAG_DOWN_RIGHT_PRED, DIAG_DOWN_LEFT_PRED, VERT_RIGHT_PRED, VERT_LEFT_PRED, HOR_UP_PRED, HOR_DOWN_PRED, }; /** mapping of RV30/40 intra 16x16 prediction types to standard H.264 types */ static const int ittrans16[4] = { DC_PRED8x8, VERT_PRED8x8, HOR_PRED8x8, PLANE_PRED8x8, }; /** * Perform 4x4 intra prediction. */ static void rv34_pred_4x4_block(RV34DecContext *r, uint8_t *dst, int stride, int itype, int up, int left, int down, int right) { uint8_t *prev = dst - stride + 4; uint32_t topleft; if(!up && !left) itype = DC_128_PRED; else if(!up){ if(itype == VERT_PRED) itype = HOR_PRED; if(itype == DC_PRED) itype = LEFT_DC_PRED; }else if(!left){ if(itype == HOR_PRED) itype = VERT_PRED; if(itype == DC_PRED) itype = TOP_DC_PRED; if(itype == DIAG_DOWN_LEFT_PRED) itype = DIAG_DOWN_LEFT_PRED_RV40_NODOWN; } if(!down){ if(itype == DIAG_DOWN_LEFT_PRED) itype = DIAG_DOWN_LEFT_PRED_RV40_NODOWN; if(itype == HOR_UP_PRED) itype = HOR_UP_PRED_RV40_NODOWN; if(itype == VERT_LEFT_PRED) itype = VERT_LEFT_PRED_RV40_NODOWN; } if(!right && up){ topleft = dst[-stride + 3] * 0x01010101; prev = (uint8_t*)&topleft; } r->h.pred4x4[itype](dst, prev, stride); } /** add_pixels_clamped for 4x4 block */ static void rv34_add_4x4_block(uint8_t *dst, int stride, DCTELEM block[64], int off) { int x, y; for(y = 0; y < 4; y++) for(x = 0; x < 4; x++) dst[x + y*stride] = av_clip_uint8(dst[x + y*stride] + block[off + x+y*8]); } static inline int adjust_pred16(int itype, int up, int left) { if(!up && !left) itype = DC_128_PRED8x8; else if(!up){ if(itype == PLANE_PRED8x8)itype = HOR_PRED8x8; if(itype == VERT_PRED8x8) itype = HOR_PRED8x8; if(itype == DC_PRED8x8) itype = LEFT_DC_PRED8x8; }else if(!left){ if(itype == PLANE_PRED8x8)itype = VERT_PRED8x8; if(itype == HOR_PRED8x8) itype = VERT_PRED8x8; if(itype == DC_PRED8x8) itype = TOP_DC_PRED8x8; } return itype; } static void rv34_output_macroblock(RV34DecContext *r, int8_t *intra_types, int cbp, int is16) { MpegEncContext *s = &r->s; DSPContext *dsp = &s->dsp; int i, j; uint8_t *Y, *U, *V; int itype; int avail[6*8] = {0}; int idx; // Set neighbour information. if(r->avail_cache[1]) avail[0] = 1; if(r->avail_cache[2]) avail[1] = avail[2] = 1; if(r->avail_cache[3]) avail[3] = avail[4] = 1; if(r->avail_cache[4]) avail[5] = 1; if(r->avail_cache[5]) avail[8] = avail[16] = 1; if(r->avail_cache[9]) avail[24] = avail[32] = 1; Y = s->dest[0]; U = s->dest[1]; V = s->dest[2]; if(!is16){ for(j = 0; j < 4; j++){ idx = 9 + j*8; for(i = 0; i < 4; i++, cbp >>= 1, Y += 4, idx++){ rv34_pred_4x4_block(r, Y, s->linesize, ittrans[intra_types[i]], avail[idx-8], avail[idx-1], avail[idx+7], avail[idx-7]); avail[idx] = 1; if(cbp & 1) rv34_add_4x4_block(Y, s->linesize, s->block[(i>>1)+(j&2)], (i&1)*4+(j&1)*32); } Y += s->linesize * 4 - 4*4; intra_types += r->intra_types_stride; } intra_types -= r->intra_types_stride * 4; fill_rectangle(r->avail_cache + 6, 2, 2, 4, 0, 4); for(j = 0; j < 2; j++){ idx = 6 + j*4; for(i = 0; i < 2; i++, cbp >>= 1, idx++){ rv34_pred_4x4_block(r, U + i*4 + j*4*s->uvlinesize, s->uvlinesize, ittrans[intra_types[i*2+j*2*r->intra_types_stride]], r->avail_cache[idx-4], r->avail_cache[idx-1], !i && !j, r->avail_cache[idx-3]); rv34_pred_4x4_block(r, V + i*4 + j*4*s->uvlinesize, s->uvlinesize, ittrans[intra_types[i*2+j*2*r->intra_types_stride]], r->avail_cache[idx-4], r->avail_cache[idx-1], !i && !j, r->avail_cache[idx-3]); r->avail_cache[idx] = 1; if(cbp & 0x01) rv34_add_4x4_block(U + i*4 + j*4*s->uvlinesize, s->uvlinesize, s->block[4], i*4+j*32); if(cbp & 0x10) rv34_add_4x4_block(V + i*4 + j*4*s->uvlinesize, s->uvlinesize, s->block[5], i*4+j*32); } } }else{ itype = ittrans16[intra_types[0]]; itype = adjust_pred16(itype, r->avail_cache[6-4], r->avail_cache[6-1]); r->h.pred16x16[itype](Y, s->linesize); dsp->add_pixels_clamped(s->block[0], Y, s->linesize); dsp->add_pixels_clamped(s->block[1], Y + 8, s->linesize); Y += s->linesize * 8; dsp->add_pixels_clamped(s->block[2], Y, s->linesize); dsp->add_pixels_clamped(s->block[3], Y + 8, s->linesize); itype = ittrans16[intra_types[0]]; if(itype == PLANE_PRED8x8) itype = DC_PRED8x8; itype = adjust_pred16(itype, r->avail_cache[6-4], r->avail_cache[6-1]); r->h.pred8x8[itype](U, s->uvlinesize); dsp->add_pixels_clamped(s->block[4], U, s->uvlinesize); r->h.pred8x8[itype](V, s->uvlinesize); dsp->add_pixels_clamped(s->block[5], V, s->uvlinesize); } } /** @} */ // recons group /** * @addtogroup bitstream * Decode macroblock header and return CBP in case of success, -1 otherwise. */ static int rv34_decode_mb_header(RV34DecContext *r, int8_t *intra_types) { MpegEncContext *s = &r->s; GetBitContext *gb = &s->gb; int mb_pos = s->mb_x + s->mb_y * s->mb_stride; int i, t; if(!r->si.type){ r->is16 = get_bits1(gb); if(!r->is16 && !r->rv30){ if(!get_bits1(gb)) av_log(s->avctx, AV_LOG_ERROR, "Need DQUANT\n"); } s->current_picture_ptr->mb_type[mb_pos] = r->is16 ? MB_TYPE_INTRA16x16 : MB_TYPE_INTRA; r->block_type = r->is16 ? RV34_MB_TYPE_INTRA16x16 : RV34_MB_TYPE_INTRA; }else{ r->block_type = r->decode_mb_info(r); if(r->block_type == -1) return -1; s->current_picture_ptr->mb_type[mb_pos] = rv34_mb_type_to_lavc[r->block_type]; r->mb_type[mb_pos] = r->block_type; if(r->block_type == RV34_MB_SKIP){ if(s->pict_type == FF_P_TYPE) r->mb_type[mb_pos] = RV34_MB_P_16x16; if(s->pict_type == FF_B_TYPE) r->mb_type[mb_pos] = RV34_MB_B_DIRECT; } r->is16 = !!IS_INTRA16x16(s->current_picture_ptr->mb_type[mb_pos]); rv34_decode_mv(r, r->block_type); if(r->block_type == RV34_MB_SKIP){ fill_rectangle(intra_types, 4, 4, r->intra_types_stride, 0, sizeof(intra_types[0])); return 0; } r->chroma_vlc = 1; r->luma_vlc = 0; } if(IS_INTRA(s->current_picture_ptr->mb_type[mb_pos])){ if(r->is16){ t = get_bits(gb, 2); fill_rectangle(intra_types, 4, 4, r->intra_types_stride, t, sizeof(intra_types[0])); r->luma_vlc = 2; }else{ if(r->decode_intra_types(r, gb, intra_types) < 0) return -1; r->luma_vlc = 1; } r->chroma_vlc = 0; r->cur_vlcs = choose_vlc_set(r->si.quant, r->si.vlc_set, 0); }else{ for(i = 0; i < 16; i++) intra_types[(i & 3) + (i>>2) * r->intra_types_stride] = 0; r->cur_vlcs = choose_vlc_set(r->si.quant, r->si.vlc_set, 1); if(r->mb_type[mb_pos] == RV34_MB_P_MIX16x16){ r->is16 = 1; r->chroma_vlc = 1; r->luma_vlc = 2; r->cur_vlcs = choose_vlc_set(r->si.quant, r->si.vlc_set, 0); } } return rv34_decode_cbp(gb, r->cur_vlcs, r->is16); } /** * @addtogroup recons * @{ */ /** * mask for retrieving all bits in coded block pattern * corresponding to one 8x8 block */ #define LUMA_CBP_BLOCK_MASK 0x33 #define U_CBP_MASK 0x0F0000 #define V_CBP_MASK 0xF00000 static void rv34_apply_differences(RV34DecContext *r, int cbp) { static const int shifts[4] = { 0, 2, 8, 10 }; MpegEncContext *s = &r->s; int i; for(i = 0; i < 4; i++) if((cbp & (LUMA_CBP_BLOCK_MASK << shifts[i])) || r->block_type == RV34_MB_P_MIX16x16) s->dsp.add_pixels_clamped(s->block[i], s->dest[0] + (i & 1)*8 + (i&2)*4*s->linesize, s->linesize); if(cbp & U_CBP_MASK) s->dsp.add_pixels_clamped(s->block[4], s->dest[1], s->uvlinesize); if(cbp & V_CBP_MASK) s->dsp.add_pixels_clamped(s->block[5], s->dest[2], s->uvlinesize); } static int is_mv_diff_gt_3(int16_t (*motion_val)[2], int step) { int d; d = motion_val[0][0] - motion_val[-step][0]; if(d < -3 || d > 3) return 1; d = motion_val[0][1] - motion_val[-step][1]; if(d < -3 || d > 3) return 1; return 0; } static int rv34_set_deblock_coef(RV34DecContext *r) { MpegEncContext *s = &r->s; int hmvmask = 0, vmvmask = 0, i, j; int midx = s->mb_x * 2 + s->mb_y * 2 * s->b8_stride; int16_t (*motion_val)[2] = s->current_picture_ptr->motion_val[0][midx]; for(j = 0; j < 16; j += 8){ for(i = 0; i < 2; i++){ if(is_mv_diff_gt_3(motion_val + i, 1)) vmvmask |= 0x11 << (j + i*2); if((j || s->mb_y) && is_mv_diff_gt_3(motion_val + i, s->b8_stride)) hmvmask |= 0x03 << (j + i*2); } motion_val += s->b8_stride; } if(s->first_slice_line) hmvmask &= ~0x000F; if(!s->mb_x) vmvmask &= ~0x1111; if(r->rv30){ //RV30 marks both subblocks on the edge for filtering vmvmask |= (vmvmask & 0x4444) >> 1; hmvmask |= (hmvmask & 0x0F00) >> 4; if(s->mb_x) r->deblock_coefs[s->mb_x - 1 + s->mb_y*s->mb_stride] |= (vmvmask & 0x1111) << 3; if(!s->first_slice_line) r->deblock_coefs[s->mb_x + (s->mb_y - 1)*s->mb_stride] |= (hmvmask & 0xF) << 12; } return hmvmask | vmvmask; } static int rv34_decode_macroblock(RV34DecContext *r, int8_t *intra_types) { MpegEncContext *s = &r->s; GetBitContext *gb = &s->gb; int cbp, cbp2; int i, blknum, blkoff; DCTELEM block16[64]; int luma_dc_quant; int dist; int mb_pos = s->mb_x + s->mb_y * s->mb_stride; // Calculate which neighbours are available. Maybe it's worth optimizing too. memset(r->avail_cache, 0, sizeof(r->avail_cache)); fill_rectangle(r->avail_cache + 6, 2, 2, 4, 1, 4); dist = (s->mb_x - s->resync_mb_x) + (s->mb_y - s->resync_mb_y) * s->mb_width; if(s->mb_x && dist) r->avail_cache[5] = r->avail_cache[9] = s->current_picture_ptr->mb_type[mb_pos - 1]; if(dist >= s->mb_width) r->avail_cache[2] = r->avail_cache[3] = s->current_picture_ptr->mb_type[mb_pos - s->mb_stride]; if(((s->mb_x+1) < s->mb_width) && dist >= s->mb_width - 1) r->avail_cache[4] = s->current_picture_ptr->mb_type[mb_pos - s->mb_stride + 1]; if(s->mb_x && dist > s->mb_width) r->avail_cache[1] = s->current_picture_ptr->mb_type[mb_pos - s->mb_stride - 1]; s->qscale = r->si.quant; cbp = cbp2 = rv34_decode_mb_header(r, intra_types); r->cbp_luma [mb_pos] = cbp; r->cbp_chroma[mb_pos] = cbp >> 16; if(s->pict_type == FF_I_TYPE) r->deblock_coefs[mb_pos] = 0xFFFF; else r->deblock_coefs[mb_pos] = rv34_set_deblock_coef(r) | r->cbp_luma[mb_pos]; s->current_picture_ptr->qscale_table[mb_pos] = s->qscale; if(cbp == -1) return -1; luma_dc_quant = r->block_type == RV34_MB_P_MIX16x16 ? r->luma_dc_quant_p[s->qscale] : r->luma_dc_quant_i[s->qscale]; if(r->is16){ memset(block16, 0, sizeof(block16)); rv34_decode_block(block16, gb, r->cur_vlcs, 3, 0); rv34_dequant4x4_16x16(block16, rv34_qscale_tab[luma_dc_quant],rv34_qscale_tab[s->qscale]); rv34_inv_transform_noround(block16); } for(i = 0; i < 16; i++, cbp >>= 1){ if(!r->is16 && !(cbp & 1)) continue; blknum = ((i & 2) >> 1) + ((i & 8) >> 2); blkoff = ((i & 1) << 2) + ((i & 4) << 3); if(cbp & 1) rv34_decode_block(s->block[blknum] + blkoff, gb, r->cur_vlcs, r->luma_vlc, 0); rv34_dequant4x4(s->block[blknum] + blkoff, rv34_qscale_tab[s->qscale],rv34_qscale_tab[s->qscale]); if(r->is16) //FIXME: optimize s->block[blknum][blkoff] = block16[(i & 3) | ((i & 0xC) << 1)]; rv34_inv_transform(s->block[blknum] + blkoff); } if(r->block_type == RV34_MB_P_MIX16x16) r->cur_vlcs = choose_vlc_set(r->si.quant, r->si.vlc_set, 1); for(; i < 24; i++, cbp >>= 1){ if(!(cbp & 1)) continue; blknum = ((i & 4) >> 2) + 4; blkoff = ((i & 1) << 2) + ((i & 2) << 4); rv34_decode_block(s->block[blknum] + blkoff, gb, r->cur_vlcs, r->chroma_vlc, 1); rv34_dequant4x4(s->block[blknum] + blkoff, rv34_qscale_tab[rv34_chroma_quant[1][s->qscale]],rv34_qscale_tab[rv34_chroma_quant[0][s->qscale]]); rv34_inv_transform(s->block[blknum] + blkoff); } if(IS_INTRA(s->current_picture_ptr->mb_type[mb_pos])) rv34_output_macroblock(r, intra_types, cbp2, r->is16); else rv34_apply_differences(r, cbp2); return 0; } static int check_slice_end(RV34DecContext *r, MpegEncContext *s) { int bits; if(s->mb_y >= s->mb_height) return 1; if(!s->mb_num_left) return 1; if(r->s.mb_skip_run > 1) return 0; bits = r->bits - get_bits_count(&s->gb); if(bits < 0 || (bits < 8 && !show_bits(&s->gb, bits))) return 1; return 0; } static inline int slice_compare(SliceInfo *si1, SliceInfo *si2) { return si1->type != si2->type || si1->start >= si2->start || si1->width != si2->width || si1->height != si2->height|| si1->pts != si2->pts; } static int rv34_decode_slice(RV34DecContext *r, int end, const uint8_t* buf, int buf_size) { MpegEncContext *s = &r->s; GetBitContext *gb = &s->gb; int mb_pos; int res; init_get_bits(&r->s.gb, buf, buf_size*8); res = r->parse_slice_header(r, gb, &r->si); if(res < 0){ av_log(s->avctx, AV_LOG_ERROR, "Incorrect or unknown slice header\n"); return -1; } if ((s->mb_x == 0 && s->mb_y == 0) || s->current_picture_ptr==NULL) { if(s->width != r->si.width || s->height != r->si.height){ av_log(s->avctx, AV_LOG_DEBUG, "Changing dimensions to %dx%d\n", r->si.width,r->si.height); MPV_common_end(s); s->width = r->si.width; s->height = r->si.height; if(MPV_common_init(s) < 0) return -1; r->intra_types_stride = s->mb_width*4 + 4; r->intra_types_hist = av_realloc(r->intra_types_hist, r->intra_types_stride * 4 * 2 * sizeof(*r->intra_types_hist)); r->intra_types = r->intra_types_hist + r->intra_types_stride * 4; r->mb_type = av_realloc(r->mb_type, r->s.mb_stride * r->s.mb_height * sizeof(*r->mb_type)); r->cbp_luma = av_realloc(r->cbp_luma, r->s.mb_stride * r->s.mb_height * sizeof(*r->cbp_luma)); r->cbp_chroma = av_realloc(r->cbp_chroma, r->s.mb_stride * r->s.mb_height * sizeof(*r->cbp_chroma)); r->deblock_coefs = av_realloc(r->deblock_coefs, r->s.mb_stride * r->s.mb_height * sizeof(*r->deblock_coefs)); } s->pict_type = r->si.type ? r->si.type : FF_I_TYPE; if(MPV_frame_start(s, s->avctx) < 0) return -1; ff_er_frame_start(s); r->cur_pts = r->si.pts; if(s->pict_type != FF_B_TYPE){ r->last_pts = r->next_pts; r->next_pts = r->cur_pts; } s->mb_x = s->mb_y = 0; } r->si.end = end; s->qscale = r->si.quant; r->bits = buf_size*8; s->mb_num_left = r->si.end - r->si.start; r->s.mb_skip_run = 0; mb_pos = s->mb_x + s->mb_y * s->mb_width; if(r->si.start != mb_pos){ av_log(s->avctx, AV_LOG_ERROR, "Slice indicates MB offset %d, got %d\n", r->si.start, mb_pos); s->mb_x = r->si.start % s->mb_width; s->mb_y = r->si.start / s->mb_width; } memset(r->intra_types_hist, -1, r->intra_types_stride * 4 * 2 * sizeof(*r->intra_types_hist)); s->first_slice_line = 1; s->resync_mb_x= s->mb_x; s->resync_mb_y= s->mb_y; ff_init_block_index(s); while(!check_slice_end(r, s)) { ff_update_block_index(s); s->dsp.clear_blocks(s->block[0]); if(rv34_decode_macroblock(r, r->intra_types + s->mb_x * 4 + 4) < 0){ ff_er_add_slice(s, s->resync_mb_x, s->resync_mb_y, s->mb_x-1, s->mb_y, AC_ERROR|DC_ERROR|MV_ERROR); return -1; } if (++s->mb_x == s->mb_width) { s->mb_x = 0; s->mb_y++; ff_init_block_index(s); memmove(r->intra_types_hist, r->intra_types, r->intra_types_stride * 4 * sizeof(*r->intra_types_hist)); memset(r->intra_types, -1, r->intra_types_stride * 4 * sizeof(*r->intra_types_hist)); if(r->loop_filter && s->mb_y >= 2) r->loop_filter(r, s->mb_y - 2); } if(s->mb_x == s->resync_mb_x) s->first_slice_line=0; s->mb_num_left--; } ff_er_add_slice(s, s->resync_mb_x, s->resync_mb_y, s->mb_x-1, s->mb_y, AC_END|DC_END|MV_END); return s->mb_y == s->mb_height; } /** @} */ // recons group end /** * Initialize decoder. */ av_cold int ff_rv34_decode_init(AVCodecContext *avctx) { RV34DecContext *r = avctx->priv_data; MpegEncContext *s = &r->s; MPV_decode_defaults(s); s->avctx= avctx; s->out_format = FMT_H263; s->codec_id= avctx->codec_id; s->width = avctx->width; s->height = avctx->height; r->s.avctx = avctx; avctx->flags |= CODEC_FLAG_EMU_EDGE; r->s.flags |= CODEC_FLAG_EMU_EDGE; avctx->pix_fmt = PIX_FMT_YUV420P; avctx->has_b_frames = 1; s->low_delay = 0; if (MPV_common_init(s) < 0) return -1; ff_h264_pred_init(&r->h, CODEC_ID_RV40); r->intra_types_stride = 4*s->mb_stride + 4; r->intra_types_hist = av_malloc(r->intra_types_stride * 4 * 2 * sizeof(*r->intra_types_hist)); r->intra_types = r->intra_types_hist + r->intra_types_stride * 4; r->mb_type = av_mallocz(r->s.mb_stride * r->s.mb_height * sizeof(*r->mb_type)); r->cbp_luma = av_malloc(r->s.mb_stride * r->s.mb_height * sizeof(*r->cbp_luma)); r->cbp_chroma = av_malloc(r->s.mb_stride * r->s.mb_height * sizeof(*r->cbp_chroma)); r->deblock_coefs = av_malloc(r->s.mb_stride * r->s.mb_height * sizeof(*r->deblock_coefs)); if(!intra_vlcs[0].cbppattern[0].bits) rv34_init_tables(); return 0; } static int get_slice_offset(AVCodecContext *avctx, const uint8_t *buf, int n) { if(avctx->slice_count) return avctx->slice_offset[n]; else return AV_RL32(buf + n*8 - 4) == 1 ? AV_RL32(buf + n*8) : AV_RB32(buf + n*8); } int ff_rv34_decode_frame(AVCodecContext *avctx, void *data, int *data_size, AVPacket *avpkt) { const uint8_t *buf = avpkt->data; int buf_size = avpkt->size; RV34DecContext *r = avctx->priv_data; MpegEncContext *s = &r->s; AVFrame *pict = data; SliceInfo si; int i; int slice_count; const uint8_t *slices_hdr = NULL; int last = 0; /* no supplementary picture */ if (buf_size == 0) { /* special case for last picture */ if (s->low_delay==0 && s->next_picture_ptr) { *pict= *(AVFrame*)s->next_picture_ptr; s->next_picture_ptr= NULL; *data_size = sizeof(AVFrame); } return 0; } if(!avctx->slice_count){ slice_count = (*buf++) + 1; slices_hdr = buf + 4; buf += 8 * slice_count; }else slice_count = avctx->slice_count; //parse first slice header to check whether this frame can be decoded if(get_slice_offset(avctx, slices_hdr, 0) > buf_size){ av_log(avctx, AV_LOG_ERROR, "Slice offset is greater than frame size\n"); return -1; } init_get_bits(&s->gb, buf+get_slice_offset(avctx, slices_hdr, 0), buf_size-get_slice_offset(avctx, slices_hdr, 0)); if(r->parse_slice_header(r, &r->s.gb, &si) < 0 || si.start){ av_log(avctx, AV_LOG_ERROR, "First slice header is incorrect\n"); return -1; } if((!s->last_picture_ptr || !s->last_picture_ptr->data[0]) && si.type == FF_B_TYPE) return -1; /* skip b frames if we are in a hurry */ if(avctx->hurry_up && si.type==FF_B_TYPE) return buf_size; if( (avctx->skip_frame >= AVDISCARD_NONREF && si.type==FF_B_TYPE) || (avctx->skip_frame >= AVDISCARD_NONKEY && si.type!=FF_I_TYPE) || avctx->skip_frame >= AVDISCARD_ALL) return buf_size; /* skip everything if we are in a hurry>=5 */ if(avctx->hurry_up>=5) return buf_size; for(i=0; i buf_size){ av_log(avctx, AV_LOG_ERROR, "Slice offset is greater than frame size\n"); break; } r->si.end = s->mb_width * s->mb_height; if(i+1 < slice_count){ init_get_bits(&s->gb, buf+get_slice_offset(avctx, slices_hdr, i+1), (buf_size-get_slice_offset(avctx, slices_hdr, i+1))*8); if(r->parse_slice_header(r, &r->s.gb, &si) < 0){ if(i+2 < slice_count) size = get_slice_offset(avctx, slices_hdr, i+2) - offset; else size = buf_size - offset; }else r->si.end = si.start; } last = rv34_decode_slice(r, r->si.end, buf + offset, size); s->mb_num_left = r->s.mb_x + r->s.mb_y*r->s.mb_width - r->si.start; if(last) break; } if(last){ if(r->loop_filter) r->loop_filter(r, s->mb_height - 1); ff_er_frame_end(s); MPV_frame_end(s); if (s->pict_type == FF_B_TYPE || s->low_delay) { *pict= *(AVFrame*)s->current_picture_ptr; } else if (s->last_picture_ptr != NULL) { *pict= *(AVFrame*)s->last_picture_ptr; } if(s->last_picture_ptr || s->low_delay){ *data_size = sizeof(AVFrame); ff_print_debug_info(s, pict); } s->current_picture_ptr= NULL; //so we can detect if frame_end wasnt called (find some nicer solution...) } return buf_size; } av_cold int ff_rv34_decode_end(AVCodecContext *avctx) { RV34DecContext *r = avctx->priv_data; MPV_common_end(&r->s); av_freep(&r->intra_types_hist); r->intra_types = NULL; av_freep(&r->mb_type); av_freep(&r->cbp_luma); av_freep(&r->cbp_chroma); av_freep(&r->deblock_coefs); return 0; }