diff --git a/libavcodec/h263.c b/libavcodec/h263.c index 26d31d3aaf..b752b582f0 100644 --- a/libavcodec/h263.c +++ b/libavcodec/h263.c @@ -28,19 +28,25 @@ //rounded divison & shift #define RDIV(a,b) ((a) > 0 ? ((a)+((b)>>1))/(b) : ((a)-((b)>>1))/(b)) #define RSHIFT(a,b) ((a) > 0 ? ((a) + (1<<((b)-1)))>>(b) : ((a) + (1<<((b)-1))-1)>>(b)) +#define ABS(a) (((a)>=0)?(a):(-(a))) static void h263_encode_block(MpegEncContext * s, DCTELEM * block, int n); static void h263_encode_motion(MpegEncContext * s, int val); static void h263p_encode_umotion(MpegEncContext * s, int val); static void mpeg4_encode_block(MpegEncContext * s, DCTELEM * block, - int n); + int n, int dc, UINT8 *scan_table); static int h263_decode_motion(MpegEncContext * s, int pred, int fcode); static int h263p_decode_umotion(MpegEncContext * s, int pred); static int h263_decode_block(MpegEncContext * s, DCTELEM * block, int n, int coded); static int mpeg4_decode_block(MpegEncContext * s, DCTELEM * block, int n, int coded); +static inline int mpeg4_pred_dc(MpegEncContext * s, int n, UINT16 **dc_val_ptr, int *dir_ptr); +static void mpeg4_inv_pred_ac(MpegEncContext * s, INT16 *block, int n, + int dir); + +extern UINT32 inverse[256]; int h263_get_picture_format(int width, int height) { @@ -195,7 +201,191 @@ int h263_encode_gob_header(MpegEncContext * s, int mb_line) } return 0; } + +static inline int decide_ac_pred(MpegEncContext * s, DCTELEM block[6][64], int dir[6]) +{ + int score0=0, score1=0; + int i, n; + + for(n=0; n<6; n++){ + int x, y, wrap; + INT16 *ac_val, *ac_val1; + + if (n < 4) { + x = 2 * s->mb_x + 1 + (n & 1); + y = 2 * s->mb_y + 1 + (n >> 1); + wrap = s->mb_width * 2 + 2; + ac_val = s->ac_val[0][0]; + } else { + x = s->mb_x + 1; + y = s->mb_y + 1; + wrap = s->mb_width + 2; + ac_val = s->ac_val[n - 4 + 1][0]; + } + ac_val += ((y) * wrap + (x)) * 16; + ac_val1= ac_val; + if(dir[n]){ + ac_val-= wrap*16; + for(i=1; i<8; i++){ + const int level= block[n][block_permute_op(i )]; + score0+= ABS(level); + score1+= ABS(level - ac_val[i+8]); + ac_val1[i ]= block[n][block_permute_op(i<<3)]; + ac_val1[i+8]= level; + } + }else{ + ac_val-= 16; + for(i=1; i<8; i++){ + const int level= block[n][block_permute_op(i<<3)]; + score0+= ABS(level); + score1+= ABS(level - ac_val[i]); + ac_val1[i ]= level; + ac_val1[i+8]= block[n][block_permute_op(i )]; + } + } + } + + return score0 > score1 ? 1 : 0; +} + +void mpeg4_encode_mb(MpegEncContext * s, + DCTELEM block[6][64], + int motion_x, int motion_y) +{ + int cbpc, cbpy, i, cbp, pred_x, pred_y; + // printf("**mb x=%d y=%d\n", s->mb_x, s->mb_y); + if (!s->mb_intra) { + /* compute cbp */ + cbp = 0; + for (i = 0; i < 6; i++) { + if (s->block_last_index[i] >= 0) + cbp |= 1 << (5 - i); + } + if ((cbp | motion_x | motion_y) == 0) { + /* skip macroblock */ + put_bits(&s->pb, 1, 1); + return; + } + put_bits(&s->pb, 1, 0); /* mb coded */ + cbpc = cbp & 3; + put_bits(&s->pb, + inter_MCBPC_bits[cbpc], + inter_MCBPC_code[cbpc]); + cbpy = cbp >> 2; + cbpy ^= 0xf; + put_bits(&s->pb, cbpy_tab[cbpy][1], cbpy_tab[cbpy][0]); + + /* motion vectors: 16x16 mode only now */ + h263_pred_motion(s, 0, &pred_x, &pred_y); + + h263_encode_motion(s, motion_x - pred_x); + h263_encode_motion(s, motion_y - pred_y); + + /* encode each block */ + for (i = 0; i < 6; i++) { + mpeg4_encode_block(s, block[i], i, 0, zigzag_direct); + } + } else { + int dc_diff[6]; //dc values with the dc prediction subtracted + int dir[6]; //prediction direction + int zigzag_last_index[6]; + UINT8 *scan_table[6]; + + for(i=0; i<6; i++){ + const int level= block[i][0]; + UINT16 *dc_ptr; + + dc_diff[i]= level - mpeg4_pred_dc(s, i, &dc_ptr, &dir[i]); + if (i < 4) { + *dc_ptr = level * s->y_dc_scale; + } else { + *dc_ptr = level * s->c_dc_scale; + } + } + + s->ac_pred= decide_ac_pred(s, block, dir); + + if(s->ac_pred){ + for(i=0; i<6; i++){ + UINT8 *st; + int last_index; + + mpeg4_inv_pred_ac(s, block[i], i, dir[i]); + if (dir[i]==0) st = ff_alternate_vertical_scan; /* left */ + else st = ff_alternate_horizontal_scan; /* top */ + + for(last_index=63; last_index>=0; last_index--) //FIXME optimize + if(block[i][st[last_index]]) break; + zigzag_last_index[i]= s->block_last_index[i]; + s->block_last_index[i]= last_index; + scan_table[i]= st; + } + }else{ + for(i=0; i<6; i++) + scan_table[i]= zigzag_direct; + } + + /* compute cbp */ + cbp = 0; + for (i = 0; i < 6; i++) { + if (s->block_last_index[i] >= 1) + cbp |= 1 << (5 - i); + } + + cbpc = cbp & 3; + if (s->pict_type == I_TYPE) { + put_bits(&s->pb, + intra_MCBPC_bits[cbpc], + intra_MCBPC_code[cbpc]); + } else { + put_bits(&s->pb, 1, 0); /* mb coded */ + put_bits(&s->pb, + inter_MCBPC_bits[cbpc + 4], + inter_MCBPC_code[cbpc + 4]); + } + put_bits(&s->pb, 1, s->ac_pred); + cbpy = cbp >> 2; + put_bits(&s->pb, cbpy_tab[cbpy][1], cbpy_tab[cbpy][0]); + + /* encode each block */ + for (i = 0; i < 6; i++) { + mpeg4_encode_block(s, block[i], i, dc_diff[i], scan_table[i]); + } + + /* restore ac coeffs & last_index stuff if we messed them up with the prediction */ + if(s->ac_pred){ + for(i=0; i<6; i++){ + int j; + int x, y, wrap; + INT16 *ac_val; + + if (i < 4) { + x = 2 * s->mb_x + 1 + (i & 1); + y = 2 * s->mb_y + 1 + (i >> 1); + wrap = s->mb_width * 2 + 2; + ac_val = s->ac_val[0][0]; + } else { + x = s->mb_x + 1; + y = s->mb_y + 1; + wrap = s->mb_width + 2; + ac_val = s->ac_val[i - 4 + 1][0]; + } + ac_val += ((y) * wrap + (x)) * 16; + + if(dir[i]){ + for(j=1; j<8; j++) + block[i][block_permute_op(j )]= ac_val[j+8]; + }else{ + for(j=1; j<8; j++) + block[i][block_permute_op(j<<3)]= ac_val[j ]; + } + s->block_last_index[i]= zigzag_last_index[i]; + } + } + } +} + void h263_encode_mb(MpegEncContext * s, DCTELEM block[6][64], int motion_x, int motion_y) @@ -268,7 +458,7 @@ void h263_encode_mb(MpegEncContext * s, /* encode each block */ if (s->h263_pred) { for (i = 0; i < 6; i++) { - mpeg4_encode_block(s, block[i], i); +// mpeg4_encode_block(s, block[i], i); } } else { for (i = 0; i < 6; i++) { @@ -277,7 +467,6 @@ void h263_encode_mb(MpegEncContext * s, } } - void h263_pred_acdc(MpegEncContext * s, INT16 *block, int n) { int x, y, wrap, a, c, pred_dc, scale, i; @@ -666,8 +855,19 @@ void mpeg4_encode_picture_header(MpegEncContext * s, int picture_number) void h263_dc_scale(MpegEncContext * s) { +#if 1 + const static UINT8 y_tab[32]={ + // 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 + 0, 8, 8, 8, 8,10,12,14,16,17,18,19,20,21,22,23,24,25,26,27,28,29,30,31,32,34,36,38,40,42,44,46 + }; + const static UINT8 c_tab[32]={ + // 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 + 0, 8, 8, 8, 8, 9, 9,10,10,11,11,12,12,13,13,14,14,15,15,16,16,17,17,18,18,19,20,21,22,23,24,25 + }; + s->y_dc_scale = y_tab[s->qscale]; + s->c_dc_scale = c_tab[s->qscale]; +#else int quant; - quant = s->qscale; /* luminance */ if (quant < 5) @@ -685,17 +885,19 @@ void h263_dc_scale(MpegEncContext * s) s->c_dc_scale = ((quant + 13) / 2); else s->c_dc_scale = (quant - 6); +#endif } -static int mpeg4_pred_dc(MpegEncContext * s, int n, UINT16 **dc_val_ptr, int *dir_ptr) +static inline int mpeg4_pred_dc(MpegEncContext * s, int n, UINT16 **dc_val_ptr, int *dir_ptr) { int a, b, c, xy, wrap, pred, scale; UINT16 *dc_val; + int dummy; /* find prediction */ if (n < 4) { wrap = s->mb_width * 2 + 2; - xy = 2 * s->mb_y + 1 + ((n & 2) >> 1); + xy = 2 * s->mb_y + 1 + (n >> 1); xy *= wrap; xy += 2 * s->mb_x + 1 + (n & 1); dc_val = s->dc_val[0]; @@ -724,7 +926,16 @@ static int mpeg4_pred_dc(MpegEncContext * s, int n, UINT16 **dc_val_ptr, int *di *dir_ptr = 0; /* left */ } /* we assume pred is positive */ +#ifdef ARCH_X86 + asm volatile ( + "xorl %%edx, %%edx \n\t" + "mul %%ecx \n\t" + : "=d" (pred), "=a"(dummy) + : "a" (pred + (scale >> 1)), "c" (inverse[scale]) + ); +#else pred = (pred + (scale >> 1)) / scale; +#endif /* prepare address for prediction update */ *dc_val_ptr = &dc_val[xy]; @@ -741,7 +952,7 @@ void mpeg4_pred_ac(MpegEncContext * s, INT16 *block, int n, /* find prediction */ if (n < 4) { x = 2 * s->mb_x + 1 + (n & 1); - y = 2 * s->mb_y + 1 + ((n & 2) >> 1); + y = 2 * s->mb_y + 1 + (n >> 1); wrap = s->mb_width * 2 + 2; ac_val = s->ac_val[0][0]; } else { @@ -775,20 +986,45 @@ void mpeg4_pred_ac(MpegEncContext * s, INT16 *block, int n, ac_val1[8 + i] = block[block_permute_op(i)]; } -static inline void mpeg4_encode_dc(MpegEncContext * s, int level, int n, int *dir_ptr) +static void mpeg4_inv_pred_ac(MpegEncContext * s, INT16 *block, int n, + int dir) { - int size, v, pred; - UINT16 *dc_val; + int x, y, wrap, i; + INT16 *ac_val; - pred = mpeg4_pred_dc(s, n, &dc_val, dir_ptr); + /* find prediction */ if (n < 4) { - *dc_val = level * s->y_dc_scale; + x = 2 * s->mb_x + 1 + (n & 1); + y = 2 * s->mb_y + 1 + (n >> 1); + wrap = s->mb_width * 2 + 2; + ac_val = s->ac_val[0][0]; } else { - *dc_val = level * s->c_dc_scale; + x = s->mb_x + 1; + y = s->mb_y + 1; + wrap = s->mb_width + 2; + ac_val = s->ac_val[n - 4 + 1][0]; } + ac_val += ((y) * wrap + (x)) * 16; + + if (dir == 0) { + /* left prediction */ + ac_val -= 16; + for(i=1;i<8;i++) { + block[block_permute_op(i*8)] -= ac_val[i]; + } + } else { + /* top prediction */ + ac_val -= 16 * wrap; + for(i=1;i<8;i++) { + block[block_permute_op(i)] -= ac_val[i + 8]; + } + } +} - /* do the prediction */ - level -= pred; + +static inline void mpeg4_encode_dc(MpegEncContext * s, int level, int n) +{ + int size, v; /* find number of bits */ size = 0; v = abs(level); @@ -815,15 +1051,15 @@ static inline void mpeg4_encode_dc(MpegEncContext * s, int level, int n, int *di } } -static void mpeg4_encode_block(MpegEncContext * s, DCTELEM * block, int n) +static void mpeg4_encode_block(MpegEncContext * s, DCTELEM * block, int n, int intra_dc, UINT8 *scan_table) { int level, run, last, i, j, last_index, last_non_zero, sign, slevel; - int code, dc_pred_dir; + int code; const RLTable *rl; if (s->mb_intra) { /* mpeg4 based DC predictor */ - mpeg4_encode_dc(s, block[0], n, &dc_pred_dir); + mpeg4_encode_dc(s, intra_dc, n); i = 1; rl = &rl_intra; } else { @@ -835,7 +1071,7 @@ static void mpeg4_encode_block(MpegEncContext * s, DCTELEM * block, int n) last_index = s->block_last_index[n]; last_non_zero = i - 1; for (; i <= last_index; i++) { - j = zigzag_direct[i]; + j = scan_table[i]; level = block[j]; if (level) { run = i - last_non_zero - 1; @@ -1449,7 +1685,7 @@ static int h263_decode_block(MpegEncContext * s, DCTELEM * block, not_coded: if (s->mb_intra && s->h263_aic) { h263_pred_acdc(s, block, n); - i = 64; + i = 63; } s->block_last_index[n] = i; return 0; @@ -2098,7 +2334,6 @@ int mpeg4_decode_picture_header(MpegEncContext * s) } if(check_marker(&s->gb, "before vop_coded")==0 && s->picture_number==0){ - int i; printf("hmm, seems the headers arnt complete, trying to guess time_increment_bits\n"); for(s->time_increment_bits++ ;s->time_increment_bits<16; s->time_increment_bits++){ if(get_bits1(&s->gb)) break; diff --git a/libavcodec/mpegvideo.c b/libavcodec/mpegvideo.c index 0aefd709c5..1b97cb699b 100644 --- a/libavcodec/mpegvideo.c +++ b/libavcodec/mpegvideo.c @@ -552,7 +552,7 @@ static inline void gmc1_motion(MpegEncContext *s, int dxy, offset, mx, my, src_x, src_y, height, linesize; int motion_x, motion_y; - if(s->real_sprite_warping_points>1) printf("Oops, thats bad, contact the developers\n"); + if(s->real_sprite_warping_points>1) printf("more than 1 warp point isnt supported\n"); motion_x= s->sprite_offset[0][0]; motion_y= s->sprite_offset[0][1]; src_x = s->mb_x * 16 + (motion_x >> (s->sprite_warping_accuracy+1)); @@ -1247,6 +1247,8 @@ static void encode_picture(MpegEncContext *s, int picture_number) case FMT_H263: if (s->h263_msmpeg4) msmpeg4_encode_mb(s, s->block, motion_x, motion_y); + else if(s->h263_pred) + mpeg4_encode_mb(s, s->block, motion_x, motion_y); else h263_encode_mb(s, s->block, motion_x, motion_y); break; diff --git a/libavcodec/mpegvideo.h b/libavcodec/mpegvideo.h index 260b31f4bb..aeaf33e76d 100644 --- a/libavcodec/mpegvideo.h +++ b/libavcodec/mpegvideo.h @@ -145,7 +145,7 @@ typedef struct MpegEncContext { int avg_mb_var; /* average MB variance for current frame */ INT64 wanted_bits; INT64 total_bits; - + /* H.263 specific */ int gob_number; int gob_index; @@ -313,6 +313,9 @@ static inline int get_rl_index(const RLTable *rl, int last, int run, int level) void h263_encode_mb(MpegEncContext *s, DCTELEM block[6][64], int motion_x, int motion_y); +void mpeg4_encode_mb(MpegEncContext *s, + DCTELEM block[6][64], + int motion_x, int motion_y); void h263_encode_picture_header(MpegEncContext *s, int picture_number); int h263_encode_gob_header(MpegEncContext * s, int mb_line); void h263_dc_scale(MpegEncContext *s);