From 2f4b476e04160dad9472a61db2dd575471f39812 Mon Sep 17 00:00:00 2001 From: Diego Biurrun Date: Sat, 18 Feb 2012 14:28:43 +0100 Subject: msmpeg4: Split encoding backend code off from general backend code. --- libavcodec/msmpeg4enc.c | 692 ++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 692 insertions(+) create mode 100644 libavcodec/msmpeg4enc.c (limited to 'libavcodec/msmpeg4enc.c') diff --git a/libavcodec/msmpeg4enc.c b/libavcodec/msmpeg4enc.c new file mode 100644 index 0000000000..67490b53f6 --- /dev/null +++ b/libavcodec/msmpeg4enc.c @@ -0,0 +1,692 @@ +/* + * MSMPEG4 encoder backend + * Copyright (c) 2001 Fabrice Bellard + * Copyright (c) 2002-2004 Michael Niedermayer + * + * msmpeg4v1 & v2 stuff by Michael Niedermayer + * + * This file is part of Libav. + * + * Libav 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. + * + * Libav 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 Libav; if not, write to the Free Software + * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA + */ + +/** + * @file + * MSMPEG4 encoder backend + */ + +#include +#include + +#include "libavutil/avutil.h" +#include "libavutil/mem.h" +#include "mpegvideo.h" +#include "msmpeg4.h" +#include "h263.h" +#include "mpeg4video.h" +#include "msmpeg4.h" +#include "msmpeg4data.h" +#include "put_bits.h" +#include "rl.h" +#include "vc1data.h" + +static uint8_t rl_length[NB_RL_TABLES][MAX_LEVEL+1][MAX_RUN+1][2]; + +/* build the table which associate a (x,y) motion vector to a vlc */ +static void init_mv_table(MVTable *tab) +{ + int i, x, y; + + tab->table_mv_index = av_malloc(sizeof(uint16_t) * 4096); + /* mark all entries as not used */ + for(i=0;i<4096;i++) + tab->table_mv_index[i] = tab->n; + + for(i=0;in;i++) { + x = tab->table_mvx[i]; + y = tab->table_mvy[i]; + tab->table_mv_index[(x << 6) | y] = i; + } +} + +void ff_msmpeg4_code012(PutBitContext *pb, int n) +{ + if (n == 0) { + put_bits(pb, 1, 0); + } else { + put_bits(pb, 1, 1); + put_bits(pb, 1, (n >= 2)); + } +} + +static int get_size_of_code(MpegEncContext * s, RLTable *rl, int last, int run, int level, int intra){ + int size=0; + int code; + int run_diff= intra ? 0 : 1; + + code = get_rl_index(rl, last, run, level); + size+= rl->table_vlc[code][1]; + if (code == rl->n) { + int level1, run1; + + level1 = level - rl->max_level[last][run]; + if (level1 < 1) + goto esc2; + code = get_rl_index(rl, last, run, level1); + if (code == rl->n) { + esc2: + size++; + if (level > MAX_LEVEL) + goto esc3; + run1 = run - rl->max_run[last][level] - run_diff; + if (run1 < 0) + goto esc3; + code = get_rl_index(rl, last, run1, level); + if (code == rl->n) { + esc3: + /* third escape */ + size+=1+1+6+8; + } else { + /* second escape */ + size+= 1+1+ rl->table_vlc[code][1]; + } + } else { + /* first escape */ + size+= 1+1+ rl->table_vlc[code][1]; + } + } else { + size++; + } + return size; +} + +av_cold void ff_msmpeg4_encode_init(MpegEncContext *s) +{ + static int init_done=0; + int i; + + ff_msmpeg4_common_init(s); + if(s->msmpeg4_version>=4){ + s->min_qcoeff= -255; + s->max_qcoeff= 255; + } + + if (!init_done) { + /* init various encoding tables */ + init_done = 1; + init_mv_table(&ff_mv_tables[0]); + init_mv_table(&ff_mv_tables[1]); + for(i=0;i0){// ;) + size++; + chroma_size++; + } + for(level=0; level<=MAX_LEVEL; level++){ + int run; + for(run=0; run<=MAX_RUN; run++){ + int last; + const int last_size= size + chroma_size; + for(last=0; last<2; last++){ + int inter_count = s->ac_stats[0][0][level][run][last] + s->ac_stats[0][1][level][run][last]; + int intra_luma_count = s->ac_stats[1][0][level][run][last]; + int intra_chroma_count= s->ac_stats[1][1][level][run][last]; + + if(s->pict_type==AV_PICTURE_TYPE_I){ + size += intra_luma_count *rl_length[i ][level][run][last]; + chroma_size+= intra_chroma_count*rl_length[i+3][level][run][last]; + }else{ + size+= intra_luma_count *rl_length[i ][level][run][last] + +intra_chroma_count*rl_length[i+3][level][run][last] + +inter_count *rl_length[i+3][level][run][last]; + } + } + if(last_size == size+chroma_size) break; + } + } + if(sizepict_type, best, s->qscale, s->mb_var_sum, s->mc_mb_var_sum, best_size); + + if(s->pict_type==AV_PICTURE_TYPE_P) chroma_best= best; + + memset(s->ac_stats, 0, sizeof(int)*(MAX_LEVEL+1)*(MAX_RUN+1)*2*2*2); + + s->rl_table_index = best; + s->rl_chroma_table_index= chroma_best; + + if(s->pict_type != s->last_non_b_pict_type){ + s->rl_table_index= 2; + if(s->pict_type==AV_PICTURE_TYPE_I) + s->rl_chroma_table_index= 1; + else + s->rl_chroma_table_index= 2; + } + +} + +/* write MSMPEG4 compatible frame header */ +void ff_msmpeg4_encode_picture_header(MpegEncContext * s, int picture_number) +{ + find_best_tables(s); + + avpriv_align_put_bits(&s->pb); + put_bits(&s->pb, 2, s->pict_type - 1); + + put_bits(&s->pb, 5, s->qscale); + if(s->msmpeg4_version<=2){ + s->rl_table_index = 2; + s->rl_chroma_table_index = 2; + } + + s->dc_table_index = 1; + s->mv_table_index = 1; /* only if P frame */ + s->use_skip_mb_code = 1; /* only if P frame */ + s->per_mb_rl_table = 0; + if(s->msmpeg4_version==4) + s->inter_intra_pred= (s->width*s->height < 320*240 && s->bit_rate<=II_BITRATE && s->pict_type==AV_PICTURE_TYPE_P); +//printf("%d %d %d %d %d\n", s->pict_type, s->bit_rate, s->inter_intra_pred, s->width, s->height); + + if (s->pict_type == AV_PICTURE_TYPE_I) { + s->slice_height= s->mb_height/1; + put_bits(&s->pb, 5, 0x16 + s->mb_height/s->slice_height); + + if(s->msmpeg4_version==4){ + ff_msmpeg4_encode_ext_header(s); + if(s->bit_rate>MBAC_BITRATE) + put_bits(&s->pb, 1, s->per_mb_rl_table); + } + + if(s->msmpeg4_version>2){ + if(!s->per_mb_rl_table){ + ff_msmpeg4_code012(&s->pb, s->rl_chroma_table_index); + ff_msmpeg4_code012(&s->pb, s->rl_table_index); + } + + put_bits(&s->pb, 1, s->dc_table_index); + } + } else { + put_bits(&s->pb, 1, s->use_skip_mb_code); + + if(s->msmpeg4_version==4 && s->bit_rate>MBAC_BITRATE) + put_bits(&s->pb, 1, s->per_mb_rl_table); + + if(s->msmpeg4_version>2){ + if(!s->per_mb_rl_table) + ff_msmpeg4_code012(&s->pb, s->rl_table_index); + + put_bits(&s->pb, 1, s->dc_table_index); + + put_bits(&s->pb, 1, s->mv_table_index); + } + } + + s->esc3_level_length= 0; + s->esc3_run_length= 0; +} + +void ff_msmpeg4_encode_ext_header(MpegEncContext * s) +{ + put_bits(&s->pb, 5, s->avctx->time_base.den / s->avctx->time_base.num); //yes 29.97 -> 29 + + put_bits(&s->pb, 11, FFMIN(s->bit_rate/1024, 2047)); + + if(s->msmpeg4_version>=3) + put_bits(&s->pb, 1, s->flipflop_rounding); + else + assert(s->flipflop_rounding==0); +} + +void ff_msmpeg4_encode_motion(MpegEncContext * s, + int mx, int my) +{ + int code; + MVTable *mv; + + /* modulo encoding */ + /* WARNING : you cannot reach all the MVs even with the modulo + encoding. This is a somewhat strange compromise they took !!! */ + if (mx <= -64) + mx += 64; + else if (mx >= 64) + mx -= 64; + if (my <= -64) + my += 64; + else if (my >= 64) + my -= 64; + + mx += 32; + my += 32; +#if 0 + if ((unsigned)mx >= 64 || + (unsigned)my >= 64) + av_log(s->avctx, AV_LOG_ERROR, "error mx=%d my=%d\n", mx, my); +#endif + mv = &ff_mv_tables[s->mv_table_index]; + + code = mv->table_mv_index[(mx << 6) | my]; + put_bits(&s->pb, + mv->table_mv_bits[code], + mv->table_mv_code[code]); + if (code == mv->n) { + /* escape : code literally */ + put_bits(&s->pb, 6, mx); + put_bits(&s->pb, 6, my); + } +} + +void ff_msmpeg4_handle_slices(MpegEncContext *s){ + if (s->mb_x == 0) { + if (s->slice_height && (s->mb_y % s->slice_height) == 0) { + if(s->msmpeg4_version < 4){ + ff_mpeg4_clean_buffers(s); + } + s->first_slice_line = 1; + } else { + s->first_slice_line = 0; + } + } +} + +static void msmpeg4v2_encode_motion(MpegEncContext * s, int val) +{ + int range, bit_size, sign, code, bits; + + if (val == 0) { + /* zero vector */ + code = 0; + put_bits(&s->pb, ff_mvtab[code][1], ff_mvtab[code][0]); + } else { + bit_size = s->f_code - 1; + range = 1 << bit_size; + if (val <= -64) + val += 64; + else if (val >= 64) + val -= 64; + + if (val >= 0) { + sign = 0; + } else { + val = -val; + sign = 1; + } + val--; + code = (val >> bit_size) + 1; + bits = val & (range - 1); + + put_bits(&s->pb, ff_mvtab[code][1] + 1, (ff_mvtab[code][0] << 1) | sign); + if (bit_size > 0) { + put_bits(&s->pb, bit_size, bits); + } + } +} + +void ff_msmpeg4_encode_mb(MpegEncContext * s, + DCTELEM block[6][64], + int motion_x, int motion_y) +{ + int cbp, coded_cbp, i; + int pred_x, pred_y; + uint8_t *coded_block; + + ff_msmpeg4_handle_slices(s); + + 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 (s->use_skip_mb_code && (cbp | motion_x | motion_y) == 0) { + /* skip macroblock */ + put_bits(&s->pb, 1, 1); + s->last_bits++; + s->misc_bits++; + s->skip_count++; + + return; + } + if (s->use_skip_mb_code) + put_bits(&s->pb, 1, 0); /* mb coded */ + + if(s->msmpeg4_version<=2){ + put_bits(&s->pb, + ff_v2_mb_type[cbp&3][1], + ff_v2_mb_type[cbp&3][0]); + if((cbp&3) != 3) coded_cbp= cbp ^ 0x3C; + else coded_cbp= cbp; + + put_bits(&s->pb, + ff_h263_cbpy_tab[coded_cbp>>2][1], + ff_h263_cbpy_tab[coded_cbp>>2][0]); + + s->misc_bits += get_bits_diff(s); + + ff_h263_pred_motion(s, 0, 0, &pred_x, &pred_y); + msmpeg4v2_encode_motion(s, motion_x - pred_x); + msmpeg4v2_encode_motion(s, motion_y - pred_y); + }else{ + put_bits(&s->pb, + ff_table_mb_non_intra[cbp + 64][1], + ff_table_mb_non_intra[cbp + 64][0]); + + s->misc_bits += get_bits_diff(s); + + /* motion vector */ + ff_h263_pred_motion(s, 0, 0, &pred_x, &pred_y); + ff_msmpeg4_encode_motion(s, motion_x - pred_x, + motion_y - pred_y); + } + + s->mv_bits += get_bits_diff(s); + + for (i = 0; i < 6; i++) { + ff_msmpeg4_encode_block(s, block[i], i); + } + s->p_tex_bits += get_bits_diff(s); + } else { + /* compute cbp */ + cbp = 0; + coded_cbp = 0; + for (i = 0; i < 6; i++) { + int val, pred; + val = (s->block_last_index[i] >= 1); + cbp |= val << (5 - i); + if (i < 4) { + /* predict value for close blocks only for luma */ + pred = ff_msmpeg4_coded_block_pred(s, i, &coded_block); + *coded_block = val; + val = val ^ pred; + } + coded_cbp |= val << (5 - i); + } + + if(s->msmpeg4_version<=2){ + if (s->pict_type == AV_PICTURE_TYPE_I) { + put_bits(&s->pb, + ff_v2_intra_cbpc[cbp&3][1], ff_v2_intra_cbpc[cbp&3][0]); + } else { + if (s->use_skip_mb_code) + put_bits(&s->pb, 1, 0); /* mb coded */ + put_bits(&s->pb, + ff_v2_mb_type[(cbp&3) + 4][1], + ff_v2_mb_type[(cbp&3) + 4][0]); + } + put_bits(&s->pb, 1, 0); /* no AC prediction yet */ + put_bits(&s->pb, + ff_h263_cbpy_tab[cbp>>2][1], + ff_h263_cbpy_tab[cbp>>2][0]); + }else{ + if (s->pict_type == AV_PICTURE_TYPE_I) { + put_bits(&s->pb, + ff_msmp4_mb_i_table[coded_cbp][1], ff_msmp4_mb_i_table[coded_cbp][0]); + } else { + if (s->use_skip_mb_code) + put_bits(&s->pb, 1, 0); /* mb coded */ + put_bits(&s->pb, + ff_table_mb_non_intra[cbp][1], + ff_table_mb_non_intra[cbp][0]); + } + put_bits(&s->pb, 1, 0); /* no AC prediction yet */ + if(s->inter_intra_pred){ + s->h263_aic_dir=0; + put_bits(&s->pb, ff_table_inter_intra[s->h263_aic_dir][1], ff_table_inter_intra[s->h263_aic_dir][0]); + } + } + s->misc_bits += get_bits_diff(s); + + for (i = 0; i < 6; i++) { + ff_msmpeg4_encode_block(s, block[i], i); + } + s->i_tex_bits += get_bits_diff(s); + s->i_count++; + } +} + +static void msmpeg4_encode_dc(MpegEncContext * s, int level, int n, int *dir_ptr) +{ + int sign, code; + int pred, extquant; + int extrabits = 0; + + int16_t *dc_val; + pred = ff_msmpeg4_pred_dc(s, n, &dc_val, dir_ptr); + + /* update predictor */ + if (n < 4) { + *dc_val = level * s->y_dc_scale; + } else { + *dc_val = level * s->c_dc_scale; + } + + /* do the prediction */ + level -= pred; + + if(s->msmpeg4_version<=2){ + if (n < 4) { + put_bits(&s->pb, + ff_v2_dc_lum_table[level + 256][1], + ff_v2_dc_lum_table[level + 256][0]); + }else{ + put_bits(&s->pb, + ff_v2_dc_chroma_table[level + 256][1], + ff_v2_dc_chroma_table[level + 256][0]); + } + }else{ + sign = 0; + if (level < 0) { + level = -level; + sign = 1; + } + code = level; + if (code > DC_MAX) + code = DC_MAX; + else if( s->msmpeg4_version>=6 ) { + if( s->qscale == 1 ) { + extquant = (level + 3) & 0x3; + code = ((level+3)>>2); + } else if( s->qscale == 2 ) { + extquant = (level + 1) & 0x1; + code = ((level+1)>>1); + } + } + + if (s->dc_table_index == 0) { + if (n < 4) { + put_bits(&s->pb, ff_table0_dc_lum[code][1], ff_table0_dc_lum[code][0]); + } else { + put_bits(&s->pb, ff_table0_dc_chroma[code][1], ff_table0_dc_chroma[code][0]); + } + } else { + if (n < 4) { + put_bits(&s->pb, ff_table1_dc_lum[code][1], ff_table1_dc_lum[code][0]); + } else { + put_bits(&s->pb, ff_table1_dc_chroma[code][1], ff_table1_dc_chroma[code][0]); + } + } + + if(s->msmpeg4_version>=6 && s->qscale<=2) + extrabits = 3 - s->qscale; + + if (code == DC_MAX) + put_bits(&s->pb, 8 + extrabits, level); + else if(extrabits > 0)//== VC1 && s->qscale<=2 + put_bits(&s->pb, extrabits, extquant); + + if (level != 0) { + put_bits(&s->pb, 1, sign); + } + } +} + +/* Encoding of a block. Very similar to MPEG4 except for a different + escape coding (same as H263) and more vlc tables. + */ +void ff_msmpeg4_encode_block(MpegEncContext * s, DCTELEM * block, int n) +{ + int level, run, last, i, j, last_index; + int last_non_zero, sign, slevel; + int code, run_diff, dc_pred_dir; + const RLTable *rl; + const uint8_t *scantable; + + if (s->mb_intra) { + msmpeg4_encode_dc(s, block[0], n, &dc_pred_dir); + i = 1; + if (n < 4) { + rl = &ff_rl_table[s->rl_table_index]; + } else { + rl = &ff_rl_table[3 + s->rl_chroma_table_index]; + } + run_diff = s->msmpeg4_version>=4; + scantable= s->intra_scantable.permutated; + } else { + i = 0; + rl = &ff_rl_table[3 + s->rl_table_index]; + if(s->msmpeg4_version<=2) + run_diff = 0; + else + run_diff = 1; + scantable= s->inter_scantable.permutated; + } + + /* recalculate block_last_index for M$ wmv1 */ + if(s->msmpeg4_version>=4 && s->msmpeg4_version<6 && s->block_last_index[n]>0){ + for(last_index=63; last_index>=0; last_index--){ + if(block[scantable[last_index]]) break; + } + s->block_last_index[n]= last_index; + }else + last_index = s->block_last_index[n]; + /* AC coefs */ + last_non_zero = i - 1; + for (; i <= last_index; i++) { + j = scantable[i]; + level = block[j]; + if (level) { + run = i - last_non_zero - 1; + last = (i == last_index); + sign = 0; + slevel = level; + if (level < 0) { + sign = 1; + level = -level; + } + + if(level<=MAX_LEVEL && run<=MAX_RUN){ + s->ac_stats[s->mb_intra][n>3][level][run][last]++; + } + + s->ac_stats[s->mb_intra][n > 3][40][63][0]++; //esc3 like + + code = get_rl_index(rl, last, run, level); + put_bits(&s->pb, rl->table_vlc[code][1], rl->table_vlc[code][0]); + if (code == rl->n) { + int level1, run1; + + level1 = level - rl->max_level[last][run]; + if (level1 < 1) + goto esc2; + code = get_rl_index(rl, last, run, level1); + if (code == rl->n) { + esc2: + put_bits(&s->pb, 1, 0); + if (level > MAX_LEVEL) + goto esc3; + run1 = run - rl->max_run[last][level] - run_diff; + if (run1 < 0) + goto esc3; + code = get_rl_index(rl, last, run1+1, level); + if (s->msmpeg4_version == 4 && code == rl->n) + goto esc3; + code = get_rl_index(rl, last, run1, level); + if (code == rl->n) { + esc3: + /* third escape */ + put_bits(&s->pb, 1, 0); + put_bits(&s->pb, 1, last); + if(s->msmpeg4_version>=4){ + if(s->esc3_level_length==0){ + s->esc3_level_length=8; + s->esc3_run_length= 6; + //ESCLVLSZ + ESCRUNSZ + if(s->qscale<8) + put_bits(&s->pb, 6 + (s->msmpeg4_version>=6), 3); + else + put_bits(&s->pb, 8, 3); + } + put_bits(&s->pb, s->esc3_run_length, run); + put_bits(&s->pb, 1, sign); + put_bits(&s->pb, s->esc3_level_length, level); + }else{ + put_bits(&s->pb, 6, run); + put_sbits(&s->pb, 8, slevel); + } + } else { + /* second escape */ + put_bits(&s->pb, 1, 1); + put_bits(&s->pb, rl->table_vlc[code][1], rl->table_vlc[code][0]); + put_bits(&s->pb, 1, sign); + } + } else { + /* first escape */ + put_bits(&s->pb, 1, 1); + put_bits(&s->pb, rl->table_vlc[code][1], rl->table_vlc[code][0]); + put_bits(&s->pb, 1, sign); + } + } else { + put_bits(&s->pb, 1, sign); + } + last_non_zero = i; + } + } +} -- cgit v1.2.3