diff options
| -rw-r--r-- | libavcodec/rv34.c | 1277 | ||||
| -rw-r--r-- | libavcodec/rv34.h | 119 |
2 files changed, 1396 insertions, 0 deletions
diff --git a/libavcodec/rv34.c b/libavcodec/rv34.c new file mode 100644 index 0000000000..1e1c129290 --- /dev/null +++ b/libavcodec/rv34.c @@ -0,0 +1,1277 @@ +/* + * 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 rv34.c + * RV30/40 decoder common data + */ + +#include "avcodec.h" +#include "dsputil.h" +#include "mpegvideo.h" +#include "golomb.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_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 +}; + + +static RV34VLC intra_vlcs[NUM_INTRA_TABLES], inter_vlcs[NUM_INTER_TABLES]; + +/** + * @defgroup vlc RV30/40 VLC generating functions + * @{ + */ + +/** + * Generate VLC from codeword lengths. + * @param bits codeword lengths (zeroes are accepted) + * @param size length of input data + * @param insyms symbols for input codes (NULL for default ones) + */ +static void rv34_gen_vlc(const uint8_t *bits, int size, VLC *vlc, const uint8_t *insyms) +{ + 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]]++; + + init_vlc_sparse(vlc, FFMIN(maxbits, 9), realsize, + bits2, 1, 1, + cw, 2, 2, + syms, 2, 2, INIT_VLC_USE_STATIC); +} + +/** + * Initialize all tables. + */ +static void rv34_init_tables() +{ + 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); + rv34_gen_vlc(rv34_table_intra_secondpat[i][j], OTHERBLK_VLC_SIZE, &intra_vlcs[i].second_pattern[j], NULL); + rv34_gen_vlc(rv34_table_intra_thirdpat [i][j], OTHERBLK_VLC_SIZE, &intra_vlcs[i].third_pattern[j], NULL); + 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); + } + 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); + rv34_gen_vlc(rv34_intra_coeff[i], COEFF_VLC_SIZE, &intra_vlcs[i].coefficient, NULL); + } + + for(i = 0; i < NUM_INTER_TABLES; i++){ + rv34_gen_vlc(rv34_inter_cbppat[i], CBPPAT_VLC_SIZE, &inter_vlcs[i].cbppattern[0], NULL); + 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); + 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); + rv34_gen_vlc(rv34_table_inter_secondpat[i][j], OTHERBLK_VLC_SIZE, &inter_vlcs[i].second_pattern[j], NULL); + rv34_gen_vlc(rv34_table_inter_thirdpat [i][j], OTHERBLK_VLC_SIZE, &inter_vlcs[i].third_pattern[j], NULL); + } + rv34_gen_vlc(rv34_inter_coeff[i], COEFF_VLC_SIZE, &inter_vlcs[i].coefficient, NULL); + } +} + +/** @} */ // 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 }; + 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 + * @{ + */ + +static inline int decode210(GetBitContext *gb){ + if (get_bits1(gb)) + return 0; + else + return 2 - get_bits1(gb); +} + +/** + * 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) + 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] = { 5, 6, 9, 10 }; + +/** + * 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; + } + } +} + +/** + * 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[5-1] & 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[5-4] & 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[5-2] & 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[5-5] & 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]; + //XXX add vector for bidirectionally predicted blocks + 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); +} + +/** + * 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 + */ +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, 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){ +#if 0 /// todo + int lx, ly; + + mx = s->current_picture_ptr->motion_val[dir][mv_pos][0] / 3; + my = s->current_picture_ptr->motion_val[dir][mv_pos][1] / 3; + lx = ((s->current_picture_ptr->motion_val[dir][mv_pos][0] % 3) + 3) % 3; + ly = ((s->current_picture_ptr->motion_val[dir][mv_pos][1] % 3) + 3) % 3; + dxy = ly*3 + lx; + uvmx = +#endif + mx = s->current_picture_ptr->motion_val[dir][mv_pos][0] >> 2; + my = s->current_picture_ptr->motion_val[dir][mv_pos][1] >> 2; + dxy = ((my & 3) << 2) | (mx & 3); + uvmx = mx & 6; + uvmy = my & 6; + }else{ + mx = s->current_picture_ptr->motion_val[dir][mv_pos][0] >> 2; + my = s->current_picture_ptr->motion_val[dir][mv_pos][1] >> 2; + dxy = ((my & 3) << 2) | (mx & 3); + uvmx = mx & 6; + uvmy = my & 6; + } + 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) + (mx >> 1); + uvsrc_y = s->mb_y * 8 + (yoff >> 1) + (my >> 1); + 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 - !!(mx&3)*2) > s->h_edge_pos - !!(mx&3)*2 - (width <<3) - 3 + || (unsigned)(src_y - !!(my&3)*2) > s->v_edge_pos - !!(my&3)*2 - (height<<3) - 3){ + uint8_t *uvbuf= s->edge_emu_buffer + 20 * s->linesize; + + srcY -= 2 + 2*s->linesize; + ff_emulated_edge_mc(s->edge_emu_buffer, srcY, s->linesize, (width<<3)+4, (height<<3)+4, + 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->s.dsp.put_h264_qpel_pixels_tab, r->s.dsp.put_h264_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->s.dsp.put_h264_qpel_pixels_tab, r->s.dsp.put_h264_chroma_pixels_tab); + rv34_mc(r, block_type, 0, 0, 0, 2, 2, 1, r->rv30, + r->s.dsp.avg_h264_qpel_pixels_tab, r->s.dsp.avg_h264_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; + + 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 == 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: + rv34_pred_mv_b (r, RV34_MB_B_DIRECT, 0); + rv34_pred_mv_b (r, RV34_MB_B_DIRECT, 1); + rv34_mc_2mv (r, RV34_MB_B_DIRECT); + 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]; + 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(!right && up){ + topleft = dst[-stride + 3] * 0x01010101; + prev = &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[0]) + avail[0] = 1; + if(r->avail_cache[1]) + avail[1] = avail[2] = 1; + if(r->avail_cache[2]) + avail[3] = avail[4] = 1; + if(r->avail_cache[3]) + avail[5] = 1; + if(r->avail_cache[4]) + avail[8] = avail[16] = 1; + if(r->avail_cache[8]) + 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 += s->b4_stride; + } + intra_types -= s->b4_stride * 4; + fill_rectangle(r->avail_cache + 5, 2, 2, 4, 0, 4); + for(j = 0; j < 2; j++){ + idx = 5 + 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*s->b4_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*s->b4_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[5-4], r->avail_cache[5-1]); + r->h.pred16x16[itype](Y, s->linesize); + dsp->add_pixels_clamped(s->block[0], Y, s->current_picture.linesize[0]); + dsp->add_pixels_clamped(s->block[1], Y + 8, s->current_picture.linesize[0]); + Y += s->current_picture.linesize[0] * 8; + dsp->add_pixels_clamped(s->block[2], Y, s->current_picture.linesize[0]); + dsp->add_pixels_clamped(s->block[3], Y + 8, s->current_picture.linesize[0]); + + itype = ittrans16[intra_types[0]]; + if(itype == PLANE_PRED8x8) itype = DC_PRED8x8; + itype = adjust_pred16(itype, r->avail_cache[5-4], r->avail_cache[5-1]); + 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 == P_TYPE) + r->mb_type[mb_pos] = RV34_MB_P_16x16; + if(s->pict_type == 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, s->b4_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, s->b4_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) * s->b4_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 0x303 + +#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])) + 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 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 + 5, 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[4] = + r->avail_cache[8] = s->current_picture_ptr->mb_type[mb_pos - 1]; + if(dist >= s->mb_width) + r->avail_cache[1] = + r->avail_cache[2] = 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[3] = s->current_picture_ptr->mb_type[mb_pos - s->mb_stride + 1]; + if(s->mb_x && dist > s->mb_width) + r->avail_cache[0] = 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); + + if(cbp == -1) + return -1; + + luma_dc_quant = r->si.type ? 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[luma_dc_quant],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[s->mb_x + s->mb_y*s->mb_stride])) + 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; +} + +static int rv34_decode_slice(RV34DecContext *r, int end, 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_hist = av_realloc(r->intra_types_hist, s->b4_stride * 4 * 2 * sizeof(*r->intra_types_hist)); + r->intra_types = r->intra_types_hist + s->b4_stride * 4; + r->mb_type = av_realloc(r->mb_type, r->s.mb_stride * r->s.mb_height * sizeof(*r->mb_type)); + } + s->pict_type = r->si.type ? r->si.type : I_TYPE; + if(MPV_frame_start(s, s->avctx) < 0) + return -1; + ff_er_frame_start(s); + s->current_picture_ptr = &s->current_picture; + 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, s->b4_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 + 1) < 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, s->b4_stride * 4 * sizeof(*r->intra_types_hist)); + memset(r->intra_types, -1, s->b4_stride * 4 * sizeof(*r->intra_types_hist)); + } + 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. + */ +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_hist = av_malloc(s->b4_stride * 4 * 2 * sizeof(*r->intra_types_hist)); + r->intra_types = r->intra_types_hist + s->b4_stride * 4; + + r->mb_type = av_mallocz(r->s.mb_stride * r->s.mb_height * sizeof(*r->mb_type)); + + if(!intra_vlcs[0].cbppattern[0].bits) + rv34_init_tables(); + + return 0; +} + +static int get_slice_offset(AVCodecContext *avctx, 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, + uint8_t *buf, int buf_size) +{ + RV34DecContext *r = avctx->priv_data; + MpegEncContext *s = &r->s; + AVFrame *pict = data; + SliceInfo si; + int i; + int slice_count; + 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; + + for(i=0; i<slice_count; i++){ + int offset= get_slice_offset(avctx, slices_hdr, i); + int size; + if(i+1 == slice_count) + size= buf_size - offset; + else + size= get_slice_offset(avctx, slices_hdr, i+1) - offset; + + 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); + ff_er_frame_end(s); + MPV_frame_end(s); + if (s->pict_type == 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; +} + +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); + + return 0; +} diff --git a/libavcodec/rv34.h b/libavcodec/rv34.h new file mode 100644 index 0000000000..0aa5911d5c --- /dev/null +++ b/libavcodec/rv34.h @@ -0,0 +1,119 @@ +/* + * RV30/40 decoder common data declarations + * 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 rv34.h + * RV30 and RV40 decoder common data declarations + */ + +#ifndef FFMPEG_RV34_H +#define FFMPEG_RV34_H + +#include "avcodec.h" +#include "dsputil.h" +#include "mpegvideo.h" + +#include "h264pred.h" + +/** + * RV30 and RV40 Macroblock types + */ +enum RV40BlockTypes{ + RV34_MB_TYPE_INTRA, ///< Intra macroblock + RV34_MB_TYPE_INTRA16x16, ///< Intra macroblock with DCs in a separate 4x4 block + RV34_MB_P_16x16, ///< P-frame macroblock, one motion frame + RV34_MB_P_8x8, ///< P-frame macroblock, 8x8 motion compensation partitions + RV34_MB_B_FORWARD, ///< B-frame macroblock, forward prediction + RV34_MB_B_BACKWARD, ///< B-frame macroblock, backward prediction + RV34_MB_SKIP, ///< Skipped block + RV34_MB_B_DIRECT, ///< Bidirectionally predicted B-frame macroblock, no motion vectors + RV34_MB_P_16x8, ///< P-frame macroblock, 16x8 motion compensation partitions + RV34_MB_P_8x16, ///< P-frame macroblock, 8x16 motion compensation partitions + RV34_MB_B_BIDIR, ///< Bidirectionally predicted B-frame macroblock, two motion vectors + RV34_MB_P_MIX16x16, ///< P-frame macroblock with DCs in a separate 4x4 block, one motion vector + RV34_MB_TYPES +}; + +/** + * VLC tables used by the decoder + * + * Intra frame VLC sets do not contain some of those tables. + */ +typedef struct RV34VLC{ + VLC cbppattern[2]; ///< VLCs used for pattern of coded block patterns decoding + VLC cbp[2][4]; ///< VLCs used for coded block patterns decoding + VLC first_pattern[4]; ///< VLCs used for decoding coefficients in the first subblock + VLC second_pattern[2]; ///< VLCs used for decoding coefficients in the subblocks 2 and 3 + VLC third_pattern[2]; ///< VLCs used for decoding coefficients in the last subblock + VLC coefficient; ///< VLCs used for decoding big coefficients +}RV34VLC; + +/** essential slice information */ +typedef struct SliceInfo{ + int type; ///< slice type (intra, inter) + int quant; ///< quantizer used for this slice + int vlc_set; ///< VLCs used for this slice + int start, end; ///< start and end macroblocks of the slice + int width; ///< coded width + int height; ///< coded height +}SliceInfo; + +/** decoder context */ +typedef struct RV34DecContext{ + MpegEncContext s; + int8_t *intra_types_hist;///< old block types, used for prediction + int8_t *intra_types; ///< block types + uint8_t *luma_dc_quant_i;///< luma subblock DC quantizer for intraframes + uint8_t *luma_dc_quant_p;///< luma subblock DC quantizer for interframes + + RV34VLC *cur_vlcs; ///< VLC set used for current frame decoding + int bits; ///< slice size in bits + H264PredContext h; ///< functions for 4x4 and 16x16 intra block prediction + SliceInfo si; ///< current slice information + + int *mb_type; ///< internal macroblock types + int block_type; ///< current block type + int luma_vlc; ///< which VLC set will be used for decoding of luma blocks + int chroma_vlc; ///< which VLC set will be used for decoding of chroma blocks + int is16; ///< current block has additional 16x16 specific features or not + int dmv[4][2]; ///< differential motion vectors for the current macroblock + + int rv30; ///< indicates which RV variasnt is currently decoded + int rpr; ///< one field size in RV30 slice header + + /** 8x8 block available flags (for MV prediction) */ + DECLARE_ALIGNED_8(uint32_t, avail_cache[3*4]); + + int (*parse_slice_header)(struct RV34DecContext *r, GetBitContext *gb, SliceInfo *si); + int (*decode_mb_info)(struct RV34DecContext *r); + int (*decode_intra_types)(struct RV34DecContext *r, GetBitContext *gb, int8_t *dst); + void (*loop_filter)(struct RV34DecContext *r); +}RV34DecContext; + +/** + * common decoding functions + */ +int ff_rv34_get_start_offset(GetBitContext *gb, int blocks); +int ff_rv34_decode_init(AVCodecContext *avctx); +int ff_rv34_decode_frame(AVCodecContext *avctx, void *data, int *data_size, uint8_t *buf, int buf_size); +int ff_rv34_decode_end(AVCodecContext *avctx); + +#endif /* FFMPEG_RV34_H */ |