--- /dev/null
+/*
+ * 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;
+}