From fc53b6afee7cdf1b9125d2c5a43f3fe879d85f24 Mon Sep 17 00:00:00 2001 From: Michael Niedermayer Date: Sat, 9 Jan 2010 14:59:06 +0000 Subject: Split H263 encoder and decoder from common code. Originally committed as revision 21109 to svn://svn.ffmpeg.org/ffmpeg/trunk --- libavcodec/h263.c | 1901 +---------------------------------------------------- 1 file changed, 3 insertions(+), 1898 deletions(-) (limited to 'libavcodec/h263.c') diff --git a/libavcodec/h263.c b/libavcodec/h263.c index 51bfacf8dc..2eb1ff5c94 100644 --- a/libavcodec/h263.c +++ b/libavcodec/h263.c @@ -5,10 +5,6 @@ * Copyright (c) 2001 Juan J. Sierralta P * Copyright (c) 2002-2004 Michael Niedermayer * - * ac prediction encoding, B-frame support, error resilience, optimizations, - * qpel decoding, gmc decoding, interlaced decoding - * by Michael Niedermayer - * * This file is part of FFmpeg. * * FFmpeg is free software; you can redistribute it and/or @@ -47,299 +43,8 @@ //#undef NDEBUG //#include -// The defines below define the number of bits that are read at once for -// reading vlc values. Changing these may improve speed and data cache needs -// be aware though that decreasing them may need the number of stages that is -// passed to get_vlc* to be increased. -#define MV_VLC_BITS 9 -#define H263_MBTYPE_B_VLC_BITS 6 -#define CBPC_B_VLC_BITS 3 - - -#if CONFIG_ENCODERS -/** - * Table of number of bits a motion vector component needs. - */ -static uint8_t mv_penalty[MAX_FCODE+1][MAX_MV*2+1]; - -/** - * Minimal fcode that a motion vector component would need. - */ -static uint8_t fcode_tab[MAX_MV*2+1]; - -/** - * Minimal fcode that a motion vector component would need in umv. - * All entries in this table are 1. - */ -static uint8_t umv_fcode_tab[MAX_MV*2+1]; - -//unified encoding tables for run length encoding of coefficients -//unified in the sense that the specification specifies the encoding in several steps. -static uint8_t uni_h263_intra_aic_rl_len [64*64*2*2]; -static uint8_t uni_h263_inter_rl_len [64*64*2*2]; -//#define UNI_MPEG4_ENC_INDEX(last,run,level) ((last)*128 + (run)*256 + (level)) -//#define UNI_MPEG4_ENC_INDEX(last,run,level) ((last)*128*64 + (run) + (level)*64) -#define UNI_MPEG4_ENC_INDEX(last,run,level) ((last)*128*64 + (run)*128 + (level)) - -#endif - -static uint8_t static_rl_table_store[2][2][2*MAX_RUN + MAX_LEVEL + 3]; - - -int h263_get_picture_format(int width, int height) -{ - if (width == 128 && height == 96) - return 1; - else if (width == 176 && height == 144) - return 2; - else if (width == 352 && height == 288) - return 3; - else if (width == 704 && height == 576) - return 4; - else if (width == 1408 && height == 1152) - return 5; - else - return 7; -} - -void ff_h263_show_pict_info(MpegEncContext *s){ - if(s->avctx->debug&FF_DEBUG_PICT_INFO){ - av_log(s->avctx, AV_LOG_DEBUG, "qp:%d %c size:%d rnd:%d%s%s%s%s%s%s%s%s%s %d/%d\n", - s->qscale, av_get_pict_type_char(s->pict_type), - s->gb.size_in_bits, 1-s->no_rounding, - s->obmc ? " AP" : "", - s->umvplus ? " UMV" : "", - s->h263_long_vectors ? " LONG" : "", - s->h263_plus ? " +" : "", - s->h263_aic ? " AIC" : "", - s->alt_inter_vlc ? " AIV" : "", - s->modified_quant ? " MQ" : "", - s->loop_filter ? " LOOP" : "", - s->h263_slice_structured ? " SS" : "", - s->avctx->time_base.den, s->avctx->time_base.num - ); - } -} - -#if CONFIG_ENCODERS - -/** - * Returns the 4 bit value that specifies the given aspect ratio. - * This may be one of the standard aspect ratios or it specifies - * that the aspect will be stored explicitly later. - */ -av_const int ff_h263_aspect_to_info(AVRational aspect){ - int i; - - if(aspect.num==0) aspect= (AVRational){1,1}; - - for(i=1; i<6; i++){ - if(av_cmp_q(ff_h263_pixel_aspect[i], aspect) == 0){ - return i; - } - } - - return FF_ASPECT_EXTENDED; -} - -void h263_encode_picture_header(MpegEncContext * s, int picture_number) -{ - int format, coded_frame_rate, coded_frame_rate_base, i, temp_ref; - int best_clock_code=1; - int best_divisor=60; - int best_error= INT_MAX; - - if(s->h263_plus){ - for(i=0; i<2; i++){ - int div, error; - div= (s->avctx->time_base.num*1800000LL + 500LL*s->avctx->time_base.den) / ((1000LL+i)*s->avctx->time_base.den); - div= av_clip(div, 1, 127); - error= FFABS(s->avctx->time_base.num*1800000LL - (1000LL+i)*s->avctx->time_base.den*div); - if(error < best_error){ - best_error= error; - best_divisor= div; - best_clock_code= i; - } - } - } - s->custom_pcf= best_clock_code!=1 || best_divisor!=60; - coded_frame_rate= 1800000; - coded_frame_rate_base= (1000+best_clock_code)*best_divisor; - - align_put_bits(&s->pb); - - /* Update the pointer to last GOB */ - s->ptr_lastgob = put_bits_ptr(&s->pb); - put_bits(&s->pb, 22, 0x20); /* PSC */ - temp_ref= s->picture_number * (int64_t)coded_frame_rate * s->avctx->time_base.num / //FIXME use timestamp - (coded_frame_rate_base * (int64_t)s->avctx->time_base.den); - put_sbits(&s->pb, 8, temp_ref); /* TemporalReference */ - - put_bits(&s->pb, 1, 1); /* marker */ - put_bits(&s->pb, 1, 0); /* h263 id */ - put_bits(&s->pb, 1, 0); /* split screen off */ - put_bits(&s->pb, 1, 0); /* camera off */ - put_bits(&s->pb, 1, 0); /* freeze picture release off */ - - format = h263_get_picture_format(s->width, s->height); - if (!s->h263_plus) { - /* H.263v1 */ - put_bits(&s->pb, 3, format); - put_bits(&s->pb, 1, (s->pict_type == FF_P_TYPE)); - /* By now UMV IS DISABLED ON H.263v1, since the restrictions - of H.263v1 UMV implies to check the predicted MV after - calculation of the current MB to see if we're on the limits */ - put_bits(&s->pb, 1, 0); /* Unrestricted Motion Vector: off */ - put_bits(&s->pb, 1, 0); /* SAC: off */ - put_bits(&s->pb, 1, s->obmc); /* Advanced Prediction */ - put_bits(&s->pb, 1, 0); /* only I/P frames, no PB frame */ - put_bits(&s->pb, 5, s->qscale); - put_bits(&s->pb, 1, 0); /* Continuous Presence Multipoint mode: off */ - } else { - int ufep=1; - /* H.263v2 */ - /* H.263 Plus PTYPE */ - - put_bits(&s->pb, 3, 7); - put_bits(&s->pb,3,ufep); /* Update Full Extended PTYPE */ - if (format == 7) - put_bits(&s->pb,3,6); /* Custom Source Format */ - else - put_bits(&s->pb, 3, format); - - put_bits(&s->pb,1, s->custom_pcf); - put_bits(&s->pb,1, s->umvplus); /* Unrestricted Motion Vector */ - put_bits(&s->pb,1,0); /* SAC: off */ - put_bits(&s->pb,1,s->obmc); /* Advanced Prediction Mode */ - put_bits(&s->pb,1,s->h263_aic); /* Advanced Intra Coding */ - put_bits(&s->pb,1,s->loop_filter); /* Deblocking Filter */ - put_bits(&s->pb,1,s->h263_slice_structured); /* Slice Structured */ - put_bits(&s->pb,1,0); /* Reference Picture Selection: off */ - put_bits(&s->pb,1,0); /* Independent Segment Decoding: off */ - put_bits(&s->pb,1,s->alt_inter_vlc); /* Alternative Inter VLC */ - put_bits(&s->pb,1,s->modified_quant); /* Modified Quantization: */ - put_bits(&s->pb,1,1); /* "1" to prevent start code emulation */ - put_bits(&s->pb,3,0); /* Reserved */ - - put_bits(&s->pb, 3, s->pict_type == FF_P_TYPE); - - put_bits(&s->pb,1,0); /* Reference Picture Resampling: off */ - put_bits(&s->pb,1,0); /* Reduced-Resolution Update: off */ - put_bits(&s->pb,1,s->no_rounding); /* Rounding Type */ - put_bits(&s->pb,2,0); /* Reserved */ - put_bits(&s->pb,1,1); /* "1" to prevent start code emulation */ - - /* This should be here if PLUSPTYPE */ - put_bits(&s->pb, 1, 0); /* Continuous Presence Multipoint mode: off */ - - if (format == 7) { - /* Custom Picture Format (CPFMT) */ - s->aspect_ratio_info= ff_h263_aspect_to_info(s->avctx->sample_aspect_ratio); - - put_bits(&s->pb,4,s->aspect_ratio_info); - put_bits(&s->pb,9,(s->width >> 2) - 1); - put_bits(&s->pb,1,1); /* "1" to prevent start code emulation */ - put_bits(&s->pb,9,(s->height >> 2)); - if (s->aspect_ratio_info == FF_ASPECT_EXTENDED){ - put_bits(&s->pb, 8, s->avctx->sample_aspect_ratio.num); - put_bits(&s->pb, 8, s->avctx->sample_aspect_ratio.den); - } - } - if(s->custom_pcf){ - if(ufep){ - put_bits(&s->pb, 1, best_clock_code); - put_bits(&s->pb, 7, best_divisor); - } - put_sbits(&s->pb, 2, temp_ref>>8); - } - - /* Unlimited Unrestricted Motion Vectors Indicator (UUI) */ - if (s->umvplus) -// put_bits(&s->pb,1,1); /* Limited according tables of Annex D */ -//FIXME check actual requested range - put_bits(&s->pb,2,1); /* unlimited */ - if(s->h263_slice_structured) - put_bits(&s->pb,2,0); /* no weird submodes */ - - put_bits(&s->pb, 5, s->qscale); - } - - put_bits(&s->pb, 1, 0); /* no PEI */ - - if(s->h263_slice_structured){ - put_bits(&s->pb, 1, 1); - - assert(s->mb_x == 0 && s->mb_y == 0); - ff_h263_encode_mba(s); - - put_bits(&s->pb, 1, 1); - } - - if(s->h263_aic){ - s->y_dc_scale_table= - s->c_dc_scale_table= ff_aic_dc_scale_table; - }else{ - s->y_dc_scale_table= - s->c_dc_scale_table= ff_mpeg1_dc_scale_table; - } -} - -/** - * Encodes a group of blocks header. - */ -void h263_encode_gob_header(MpegEncContext * s, int mb_line) -{ - put_bits(&s->pb, 17, 1); /* GBSC */ - - if(s->h263_slice_structured){ - put_bits(&s->pb, 1, 1); - - ff_h263_encode_mba(s); - - if(s->mb_num > 1583) - put_bits(&s->pb, 1, 1); - put_bits(&s->pb, 5, s->qscale); /* GQUANT */ - put_bits(&s->pb, 1, 1); - put_bits(&s->pb, 2, s->pict_type == FF_I_TYPE); /* GFID */ - }else{ - int gob_number= mb_line / s->gob_index; - - put_bits(&s->pb, 5, gob_number); /* GN */ - put_bits(&s->pb, 2, s->pict_type == FF_I_TYPE); /* GFID */ - put_bits(&s->pb, 5, s->qscale); /* GQUANT */ - } -} - -/** - * modify qscale so that encoding is acually possible in h263 (limit difference to -2..2) - */ -void ff_clean_h263_qscales(MpegEncContext *s){ - int i; - int8_t * const qscale_table= s->current_picture.qscale_table; - - ff_init_qscale_tab(s); - - for(i=1; imb_num; i++){ - if(qscale_table[ s->mb_index2xy[i] ] - qscale_table[ s->mb_index2xy[i-1] ] >2) - qscale_table[ s->mb_index2xy[i] ]= qscale_table[ s->mb_index2xy[i-1] ]+2; - } - for(i=s->mb_num-2; i>=0; i--){ - if(qscale_table[ s->mb_index2xy[i] ] - qscale_table[ s->mb_index2xy[i+1] ] >2) - qscale_table[ s->mb_index2xy[i] ]= qscale_table[ s->mb_index2xy[i+1] ]+2; - } - - if(s->codec_id != CODEC_ID_H263P){ - for(i=1; imb_num; i++){ - int mb_xy= s->mb_index2xy[i]; - - if(qscale_table[mb_xy] != qscale_table[s->mb_index2xy[i-1]] && (s->mb_type[mb_xy]&CANDIDATE_MB_TYPE_INTER4V)){ - s->mb_type[mb_xy]|= CANDIDATE_MB_TYPE_INTER; - } - } - } -} +uint8_t ff_h263_static_rl_table_store[2][2][2*MAX_RUN + MAX_LEVEL + 3]; -#endif //CONFIG_ENCODERS void ff_h263_update_motion_val(MpegEncContext * s){ const int mb_xy = s->mb_y * s->mb_stride + s->mb_x; @@ -393,164 +98,7 @@ void ff_h263_update_motion_val(MpegEncContext * s){ } } -#if CONFIG_ENCODERS - -static const int dquant_code[5]= {1,0,9,2,3}; - -/** - * encodes a 8x8 block. - * @param block the 8x8 block - * @param n block index (0-3 are luma, 4-5 are chroma) - */ -static void h263_encode_block(MpegEncContext * s, DCTELEM * block, int n) -{ - int level, run, last, i, j, last_index, last_non_zero, sign, slevel, code; - RLTable *rl; - - rl = &ff_h263_rl_inter; - if (s->mb_intra && !s->h263_aic) { - /* DC coef */ - level = block[0]; - /* 255 cannot be represented, so we clamp */ - if (level > 254) { - level = 254; - block[0] = 254; - } - /* 0 cannot be represented also */ - else if (level < 1) { - level = 1; - block[0] = 1; - } - if (level == 128) //FIXME check rv10 - put_bits(&s->pb, 8, 0xff); - else - put_bits(&s->pb, 8, level); - i = 1; - } else { - i = 0; - if (s->h263_aic && s->mb_intra) - rl = &rl_intra_aic; - - if(s->alt_inter_vlc && !s->mb_intra){ - int aic_vlc_bits=0; - int inter_vlc_bits=0; - int wrong_pos=-1; - int aic_code; - - last_index = s->block_last_index[n]; - last_non_zero = i - 1; - for (; i <= last_index; i++) { - j = s->intra_scantable.permutated[i]; - level = block[j]; - if (level) { - run = i - last_non_zero - 1; - last = (i == last_index); - - if(level<0) level= -level; - - code = get_rl_index(rl, last, run, level); - aic_code = get_rl_index(&rl_intra_aic, last, run, level); - inter_vlc_bits += rl->table_vlc[code][1]+1; - aic_vlc_bits += rl_intra_aic.table_vlc[aic_code][1]+1; - - if (code == rl->n) { - inter_vlc_bits += 1+6+8-1; - } - if (aic_code == rl_intra_aic.n) { - aic_vlc_bits += 1+6+8-1; - wrong_pos += run + 1; - }else - wrong_pos += wrong_run[aic_code]; - last_non_zero = i; - } - } - i = 0; - if(aic_vlc_bits < inter_vlc_bits && wrong_pos > 63) - rl = &rl_intra_aic; - } - } - - /* AC coefs */ - last_index = s->block_last_index[n]; - last_non_zero = i - 1; - for (; i <= last_index; i++) { - j = s->intra_scantable.permutated[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; - } - 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) { - if(!CONFIG_FLV_ENCODER || s->h263_flv <= 1){ - put_bits(&s->pb, 1, last); - put_bits(&s->pb, 6, run); - - assert(slevel != 0); - - if(level < 128) - put_sbits(&s->pb, 8, slevel); - else{ - put_bits(&s->pb, 8, 128); - put_sbits(&s->pb, 5, slevel); - put_sbits(&s->pb, 6, slevel>>5); - } - }else{ - ff_flv2_encode_ac_esc(&s->pb, slevel, level, run, last); - } - } else { - put_bits(&s->pb, 1, sign); - } - last_non_zero = i; - } - } -} - -/* Encode MV differences on H.263+ with Unrestricted MV mode */ -static void h263p_encode_umotion(MpegEncContext * s, int val) -{ - short sval = 0; - short i = 0; - short n_bits = 0; - short temp_val; - int code = 0; - int tcode; - - if ( val == 0) - put_bits(&s->pb, 1, 1); - else if (val == 1) - put_bits(&s->pb, 3, 0); - else if (val == -1) - put_bits(&s->pb, 3, 2); - else { - - sval = ((val < 0) ? (short)(-val):(short)val); - temp_val = sval; - - while (temp_val != 0) { - temp_val = temp_val >> 1; - n_bits++; - } - - i = n_bits - 1; - while (i > 0) { - tcode = (sval & (1 << (i-1))) >> (i-1); - tcode = (tcode << 1) | 1; - code = (code << 2) | tcode; - i--; - } - code = ((code << 1) | (val < 0)) << 1; - put_bits(&s->pb, (2*n_bits)+1, code); - } -} - -static int h263_pred_dc(MpegEncContext * s, int n, int16_t **dc_val_ptr) +int h263_pred_dc(MpegEncContext * s, int n, int16_t **dc_val_ptr) { int x, y, wrap, a, c, pred_dc; int16_t *dc_val; @@ -591,208 +139,6 @@ static int h263_pred_dc(MpegEncContext * s, int n, int16_t **dc_val_ptr) return pred_dc; } -void h263_encode_mb(MpegEncContext * s, - DCTELEM block[6][64], - int motion_x, int motion_y) -{ - int cbpc, cbpy, i, cbp, pred_x, pred_y; - int16_t pred_dc; - int16_t rec_intradc[6]; - int16_t *dc_ptr[6]; - const int interleaved_stats= (s->flags&CODEC_FLAG_PASS1); - - if (!s->mb_intra) { - /* compute cbp */ - cbp= get_p_cbp(s, block, motion_x, motion_y); - - if ((cbp | motion_x | motion_y | s->dquant | (s->mv_type - MV_TYPE_16X16)) == 0) { - /* skip macroblock */ - put_bits(&s->pb, 1, 1); - if(interleaved_stats){ - s->misc_bits++; - s->last_bits++; - } - s->skip_count++; - - return; - } - put_bits(&s->pb, 1, 0); /* mb coded */ - - cbpc = cbp & 3; - cbpy = cbp >> 2; - if(s->alt_inter_vlc==0 || cbpc!=3) - cbpy ^= 0xF; - if(s->dquant) cbpc+= 8; - if(s->mv_type==MV_TYPE_16X16){ - put_bits(&s->pb, - ff_h263_inter_MCBPC_bits[cbpc], - ff_h263_inter_MCBPC_code[cbpc]); - - put_bits(&s->pb, ff_h263_cbpy_tab[cbpy][1], ff_h263_cbpy_tab[cbpy][0]); - if(s->dquant) - put_bits(&s->pb, 2, dquant_code[s->dquant+2]); - - if(interleaved_stats){ - s->misc_bits+= get_bits_diff(s); - } - - /* motion vectors: 16x16 mode */ - h263_pred_motion(s, 0, 0, &pred_x, &pred_y); - - if (!s->umvplus) { - ff_h263_encode_motion_vector(s, motion_x - pred_x, - motion_y - pred_y, 1); - } - else { - h263p_encode_umotion(s, motion_x - pred_x); - h263p_encode_umotion(s, motion_y - pred_y); - if (((motion_x - pred_x) == 1) && ((motion_y - pred_y) == 1)) - /* To prevent Start Code emulation */ - put_bits(&s->pb,1,1); - } - }else{ - put_bits(&s->pb, - ff_h263_inter_MCBPC_bits[cbpc+16], - ff_h263_inter_MCBPC_code[cbpc+16]); - put_bits(&s->pb, ff_h263_cbpy_tab[cbpy][1], ff_h263_cbpy_tab[cbpy][0]); - if(s->dquant) - put_bits(&s->pb, 2, dquant_code[s->dquant+2]); - - if(interleaved_stats){ - s->misc_bits+= get_bits_diff(s); - } - - for(i=0; i<4; i++){ - /* motion vectors: 8x8 mode*/ - h263_pred_motion(s, i, 0, &pred_x, &pred_y); - - motion_x= s->current_picture.motion_val[0][ s->block_index[i] ][0]; - motion_y= s->current_picture.motion_val[0][ s->block_index[i] ][1]; - if (!s->umvplus) { - ff_h263_encode_motion_vector(s, motion_x - pred_x, - motion_y - pred_y, 1); - } - else { - h263p_encode_umotion(s, motion_x - pred_x); - h263p_encode_umotion(s, motion_y - pred_y); - if (((motion_x - pred_x) == 1) && ((motion_y - pred_y) == 1)) - /* To prevent Start Code emulation */ - put_bits(&s->pb,1,1); - } - } - } - - if(interleaved_stats){ - s->mv_bits+= get_bits_diff(s); - } - } else { - assert(s->mb_intra); - - cbp = 0; - if (s->h263_aic) { - /* Predict DC */ - for(i=0; i<6; i++) { - int16_t level = block[i][0]; - int scale; - - if(i<4) scale= s->y_dc_scale; - else scale= s->c_dc_scale; - - pred_dc = h263_pred_dc(s, i, &dc_ptr[i]); - level -= pred_dc; - /* Quant */ - if (level >= 0) - level = (level + (scale>>1))/scale; - else - level = (level - (scale>>1))/scale; - - /* AIC can change CBP */ - if (level == 0 && s->block_last_index[i] == 0) - s->block_last_index[i] = -1; - - if(!s->modified_quant){ - if (level < -127) - level = -127; - else if (level > 127) - level = 127; - } - - block[i][0] = level; - /* Reconstruction */ - rec_intradc[i] = scale*level + pred_dc; - /* Oddify */ - rec_intradc[i] |= 1; - //if ((rec_intradc[i] % 2) == 0) - // rec_intradc[i]++; - /* Clipping */ - if (rec_intradc[i] < 0) - rec_intradc[i] = 0; - else if (rec_intradc[i] > 2047) - rec_intradc[i] = 2047; - - /* Update AC/DC tables */ - *dc_ptr[i] = rec_intradc[i]; - if (s->block_last_index[i] >= 0) - cbp |= 1 << (5 - i); - } - }else{ - for(i=0; i<6; i++) { - /* compute cbp */ - if (s->block_last_index[i] >= 1) - cbp |= 1 << (5 - i); - } - } - - cbpc = cbp & 3; - if (s->pict_type == FF_I_TYPE) { - if(s->dquant) cbpc+=4; - put_bits(&s->pb, - ff_h263_intra_MCBPC_bits[cbpc], - ff_h263_intra_MCBPC_code[cbpc]); - } else { - if(s->dquant) cbpc+=8; - put_bits(&s->pb, 1, 0); /* mb coded */ - put_bits(&s->pb, - ff_h263_inter_MCBPC_bits[cbpc + 4], - ff_h263_inter_MCBPC_code[cbpc + 4]); - } - if (s->h263_aic) { - /* XXX: currently, we do not try to use ac prediction */ - put_bits(&s->pb, 1, 0); /* no AC prediction */ - } - cbpy = cbp >> 2; - put_bits(&s->pb, ff_h263_cbpy_tab[cbpy][1], ff_h263_cbpy_tab[cbpy][0]); - if(s->dquant) - put_bits(&s->pb, 2, dquant_code[s->dquant+2]); - - if(interleaved_stats){ - s->misc_bits+= get_bits_diff(s); - } - } - - for(i=0; i<6; i++) { - /* encode each block */ - h263_encode_block(s, block[i], i); - - /* Update INTRADC for decoding */ - if (s->h263_aic && s->mb_intra) { - block[i][0] = rec_intradc[i]; - - } - } - - if(interleaved_stats){ - if (!s->mb_intra) { - s->p_tex_bits+= get_bits_diff(s); - s->f_count++; - }else{ - s->i_tex_bits+= get_bits_diff(s); - s->i_count++; - } - } -} -#endif - void ff_h263_loop_filter(MpegEncContext * s){ int qp_c; const int linesize = s->linesize; @@ -880,7 +226,7 @@ void ff_h263_loop_filter(MpegEncContext * s){ } } -static void h263_pred_acdc(MpegEncContext * s, DCTELEM *block, int n) +void h263_pred_acdc(MpegEncContext * s, DCTELEM *block, int n) { int x, y, wrap, a, c, pred_dc, scale, i; int16_t *dc_val, *ac_val, *ac_val1; @@ -1025,229 +371,6 @@ int16_t *h263_pred_motion(MpegEncContext * s, int block, int dir, return *mot_val; } -#if CONFIG_ENCODERS - -/***************************************************/ -void ff_h263_encode_motion(MpegEncContext * s, int val, int f_code) -{ - int range, l, bit_size, sign, code, bits; - - if (val == 0) { - /* zero vector */ - code = 0; - put_bits(&s->pb, mvtab[code][1], mvtab[code][0]); - } else { - bit_size = f_code - 1; - range = 1 << bit_size; - /* modulo encoding */ - l= INT_BIT - 6 - bit_size; - val = (val<>l; - sign = val>>31; - val= (val^sign)-sign; - sign&=1; - - val--; - code = (val >> bit_size) + 1; - bits = val & (range - 1); - - put_bits(&s->pb, mvtab[code][1] + 1, (mvtab[code][0] << 1) | sign); - if (bit_size > 0) { - put_bits(&s->pb, bit_size, bits); - } - } -} - -static void init_mv_penalty_and_fcode(MpegEncContext *s) -{ - int f_code; - int mv; - - for(f_code=1; f_code<=MAX_FCODE; f_code++){ - for(mv=-MAX_MV; mv<=MAX_MV; mv++){ - int len; - - if(mv==0) len= mvtab[0][1]; - else{ - int val, bit_size, code; - - bit_size = f_code - 1; - - val=mv; - if (val < 0) - val = -val; - val--; - code = (val >> bit_size) + 1; - if(code<33){ - len= mvtab[code][1] + 1 + bit_size; - }else{ - len= mvtab[32][1] + av_log2(code>>5) + 2 + bit_size; - } - } - - mv_penalty[f_code][mv+MAX_MV]= len; - } - } - - for(f_code=MAX_FCODE; f_code>0; f_code--){ - for(mv=-(16<= 64); - assert(MAX_RUN >= 63); - - for(slevel=-64; slevel<64; slevel++){ - if(slevel==0) continue; - for(run=0; run<64; run++){ - for(last=0; last<=1; last++){ - const int index= UNI_MPEG4_ENC_INDEX(last, run, slevel+64); - int level= slevel < 0 ? -slevel : slevel; - int sign= slevel < 0 ? 1 : 0; - int bits, len, code; - - len_tab[index]= 100; - - /* ESC0 */ - code= get_rl_index(rl, last, run, level); - bits= rl->table_vlc[code][0]; - len= rl->table_vlc[code][1]; - bits=bits*2+sign; len++; - - if(code!=rl->n && len < len_tab[index]){ - if(bits_tab) bits_tab[index]= bits; - len_tab [index]= len; - } - /* ESC */ - bits= rl->table_vlc[rl->n][0]; - len = rl->table_vlc[rl->n][1]; - bits=bits*2+last; len++; - bits=bits*64+run; len+=6; - bits=bits*256+(level&0xff); len+=8; - - if(len < len_tab[index]){ - if(bits_tab) bits_tab[index]= bits; - len_tab [index]= len; - } - } - } - } -} - -void h263_encode_init(MpegEncContext *s) -{ - static int done = 0; - - if (!done) { - done = 1; - - init_rl(&ff_h263_rl_inter, static_rl_table_store[0]); - init_rl(&rl_intra_aic, static_rl_table_store[1]); - - init_uni_h263_rl_tab(&rl_intra_aic, NULL, uni_h263_intra_aic_rl_len); - init_uni_h263_rl_tab(&ff_h263_rl_inter , NULL, uni_h263_inter_rl_len); - - init_mv_penalty_and_fcode(s); - } - s->me.mv_penalty= mv_penalty; //FIXME exact table for msmpeg4 & h263p - - s->intra_ac_vlc_length =s->inter_ac_vlc_length = uni_h263_inter_rl_len; - s->intra_ac_vlc_last_length=s->inter_ac_vlc_last_length= uni_h263_inter_rl_len + 128*64; - if(s->h263_aic){ - s->intra_ac_vlc_length = uni_h263_intra_aic_rl_len; - s->intra_ac_vlc_last_length= uni_h263_intra_aic_rl_len + 128*64; - } - s->ac_esc_length= 7+1+6+8; - - // use fcodes >1 only for mpeg4 & h263 & h263p FIXME - switch(s->codec_id){ - case CODEC_ID_MPEG4: - s->fcode_tab= fcode_tab; - break; - case CODEC_ID_H263P: - if(s->umvplus) - s->fcode_tab= umv_fcode_tab; - if(s->modified_quant){ - s->min_qcoeff= -2047; - s->max_qcoeff= 2047; - }else{ - s->min_qcoeff= -127; - s->max_qcoeff= 127; - } - break; - //Note for mpeg4 & h263 the dc-scale table will be set per frame as needed later - case CODEC_ID_FLV1: - if (s->h263_flv > 1) { - s->min_qcoeff= -1023; - s->max_qcoeff= 1023; - } else { - s->min_qcoeff= -127; - s->max_qcoeff= 127; - } - s->y_dc_scale_table= - s->c_dc_scale_table= ff_mpeg1_dc_scale_table; - break; - default: //nothing needed - default table already set in mpegvideo.c - s->min_qcoeff= -127; - s->max_qcoeff= 127; - s->y_dc_scale_table= - s->c_dc_scale_table= ff_mpeg1_dc_scale_table; - } -} -#endif //CONFIG_ENCODERS - -/***********************************************/ -/* decoding */ - -VLC ff_h263_intra_MCBPC_vlc; -VLC ff_h263_inter_MCBPC_vlc; -VLC ff_h263_cbpy_vlc; -static VLC mv_vlc; -static VLC h263_mbtype_b_vlc; -static VLC cbpc_b_vlc; - -/* init vlcs */ - -/* XXX: find a better solution to handle static init */ -void h263_decode_init_vlc(MpegEncContext *s) -{ - static int done = 0; - - if (!done) { - done = 1; - - INIT_VLC_STATIC(&ff_h263_intra_MCBPC_vlc, INTRA_MCBPC_VLC_BITS, 9, - ff_h263_intra_MCBPC_bits, 1, 1, - ff_h263_intra_MCBPC_code, 1, 1, 72); - INIT_VLC_STATIC(&ff_h263_inter_MCBPC_vlc, INTER_MCBPC_VLC_BITS, 28, - ff_h263_inter_MCBPC_bits, 1, 1, - ff_h263_inter_MCBPC_code, 1, 1, 198); - INIT_VLC_STATIC(&ff_h263_cbpy_vlc, CBPY_VLC_BITS, 16, - &ff_h263_cbpy_tab[0][1], 2, 1, - &ff_h263_cbpy_tab[0][0], 2, 1, 64); - INIT_VLC_STATIC(&mv_vlc, MV_VLC_BITS, 33, - &mvtab[0][1], 2, 1, - &mvtab[0][0], 2, 1, 538); - init_rl(&ff_h263_rl_inter, static_rl_table_store[0]); - init_rl(&rl_intra_aic, static_rl_table_store[1]); - INIT_VLC_RL(ff_h263_rl_inter, 554); - INIT_VLC_RL(rl_intra_aic, 554); - INIT_VLC_STATIC(&h263_mbtype_b_vlc, H263_MBTYPE_B_VLC_BITS, 15, - &h263_mbtype_b_tab[0][1], 2, 1, - &h263_mbtype_b_tab[0][0], 2, 1, 80); - INIT_VLC_STATIC(&cbpc_b_vlc, CBPC_B_VLC_BITS, 4, - &cbpc_b_tab[0][1], 2, 1, - &cbpc_b_tab[0][0], 2, 1, 8); - } -} /** * Get the GOB height based on picture height. @@ -1260,1021 +383,3 @@ int ff_h263_get_gob_height(MpegEncContext *s){ else return 4; } - -int ff_h263_decode_mba(MpegEncContext *s) -{ - int i, mb_pos; - - for(i=0; i<6; i++){ - if(s->mb_num-1 <= ff_mba_max[i]) break; - } - mb_pos= get_bits(&s->gb, ff_mba_length[i]); - s->mb_x= mb_pos % s->mb_width; - s->mb_y= mb_pos / s->mb_width; - - return mb_pos; -} - -void ff_h263_encode_mba(MpegEncContext *s) -{ - int i, mb_pos; - - for(i=0; i<6; i++){ - if(s->mb_num-1 <= ff_mba_max[i]) break; - } - mb_pos= s->mb_x + s->mb_width*s->mb_y; - put_bits(&s->pb, ff_mba_length[i], mb_pos); -} - -/** - * decodes the group of blocks header or slice header. - * @return <0 if an error occurred - */ -static int h263_decode_gob_header(MpegEncContext *s) -{ - unsigned int val, gfid, gob_number; - int left; - - /* Check for GOB Start Code */ - val = show_bits(&s->gb, 16); - if(val) - return -1; - - /* We have a GBSC probably with GSTUFF */ - skip_bits(&s->gb, 16); /* Drop the zeros */ - left= get_bits_left(&s->gb); - //MN: we must check the bits left or we might end in a infinite loop (or segfault) - for(;left>13; left--){ - if(get_bits1(&s->gb)) break; /* Seek the '1' bit */ - } - if(left<=13) - return -1; - - if(s->h263_slice_structured){ - if(get_bits1(&s->gb)==0) - return -1; - - ff_h263_decode_mba(s); - - if(s->mb_num > 1583) - if(get_bits1(&s->gb)==0) - return -1; - - s->qscale = get_bits(&s->gb, 5); /* SQUANT */ - if(get_bits1(&s->gb)==0) - return -1; - gfid = get_bits(&s->gb, 2); /* GFID */ - }else{ - gob_number = get_bits(&s->gb, 5); /* GN */ - s->mb_x= 0; - s->mb_y= s->gob_index* gob_number; - gfid = get_bits(&s->gb, 2); /* GFID */ - s->qscale = get_bits(&s->gb, 5); /* GQUANT */ - } - - if(s->mb_y >= s->mb_height) - return -1; - - if(s->qscale==0) - return -1; - - return 0; -} - -static inline void memsetw(short *tab, int val, int n) -{ - int i; - for(i=0;icodec_id==CODEC_ID_MPEG4){ - skip_bits1(&s->gb); - align_get_bits(&s->gb); - } - - if(show_bits(&s->gb, 16)==0){ - pos= get_bits_count(&s->gb); - if(CONFIG_MPEG4_DECODER && s->codec_id==CODEC_ID_MPEG4) - ret= mpeg4_decode_video_packet_header(s); - else - ret= h263_decode_gob_header(s); - if(ret>=0) - return pos; - } - //OK, it's not where it is supposed to be ... - s->gb= s->last_resync_gb; - align_get_bits(&s->gb); - left= get_bits_left(&s->gb); - - for(;left>16+1+5+5; left-=8){ - if(show_bits(&s->gb, 16)==0){ - GetBitContext bak= s->gb; - - pos= get_bits_count(&s->gb); - if(CONFIG_MPEG4_DECODER && s->codec_id==CODEC_ID_MPEG4) - ret= mpeg4_decode_video_packet_header(s); - else - ret= h263_decode_gob_header(s); - if(ret>=0) - return pos; - - s->gb= bak; - } - skip_bits(&s->gb, 8); - } - - return -1; -} - -int h263_decode_motion(MpegEncContext * s, int pred, int f_code) -{ - int code, val, sign, shift, l; - code = get_vlc2(&s->gb, mv_vlc.table, MV_VLC_BITS, 2); - - if (code == 0) - return pred; - if (code < 0) - return 0xffff; - - sign = get_bits1(&s->gb); - shift = f_code - 1; - val = code; - if (shift) { - val = (val - 1) << shift; - val |= get_bits(&s->gb, shift); - val++; - } - if (sign) - val = -val; - val += pred; - - /* modulo decoding */ - if (!s->h263_long_vectors) { - l = INT_BIT - 5 - f_code; - val = (val<>l; - } else { - /* horrible h263 long vector mode */ - if (pred < -31 && val < -63) - val += 64; - if (pred > 32 && val > 63) - val -= 64; - - } - return val; -} - - -/* Decodes RVLC of H.263+ UMV */ -static int h263p_decode_umotion(MpegEncContext * s, int pred) -{ - int code = 0, sign; - - if (get_bits1(&s->gb)) /* Motion difference = 0 */ - return pred; - - code = 2 + get_bits1(&s->gb); - - while (get_bits1(&s->gb)) - { - code <<= 1; - code += get_bits1(&s->gb); - } - sign = code & 1; - code >>= 1; - - code = (sign) ? (pred - code) : (pred + code); - dprintf(s->avctx,"H.263+ UMV Motion = %d\n", code); - return code; - -} - -/** - * read the next MVs for OBMC. yes this is a ugly hack, feel free to send a patch :) - */ -static void preview_obmc(MpegEncContext *s){ - GetBitContext gb= s->gb; - - int cbpc, i, pred_x, pred_y, mx, my; - int16_t *mot_val; - const int xy= s->mb_x + 1 + s->mb_y * s->mb_stride; - const int stride= s->b8_stride*2; - - for(i=0; i<4; i++) - s->block_index[i]+= 2; - for(i=4; i<6; i++) - s->block_index[i]+= 1; - s->mb_x++; - - assert(s->pict_type == FF_P_TYPE); - - do{ - if (get_bits1(&s->gb)) { - /* skip mb */ - mot_val = s->current_picture.motion_val[0][ s->block_index[0] ]; - mot_val[0 ]= mot_val[2 ]= - mot_val[0+stride]= mot_val[2+stride]= 0; - mot_val[1 ]= mot_val[3 ]= - mot_val[1+stride]= mot_val[3+stride]= 0; - - s->current_picture.mb_type[xy]= MB_TYPE_SKIP | MB_TYPE_16x16 | MB_TYPE_L0; - goto end; - } - cbpc = get_vlc2(&s->gb, ff_h263_inter_MCBPC_vlc.table, INTER_MCBPC_VLC_BITS, 2); - }while(cbpc == 20); - - if(cbpc & 4){ - s->current_picture.mb_type[xy]= MB_TYPE_INTRA; - }else{ - get_vlc2(&s->gb, ff_h263_cbpy_vlc.table, CBPY_VLC_BITS, 1); - if (cbpc & 8) { - if(s->modified_quant){ - if(get_bits1(&s->gb)) skip_bits(&s->gb, 1); - else skip_bits(&s->gb, 5); - }else - skip_bits(&s->gb, 2); - } - - if ((cbpc & 16) == 0) { - s->current_picture.mb_type[xy]= MB_TYPE_16x16 | MB_TYPE_L0; - /* 16x16 motion prediction */ - mot_val= h263_pred_motion(s, 0, 0, &pred_x, &pred_y); - if (s->umvplus) - mx = h263p_decode_umotion(s, pred_x); - else - mx = h263_decode_motion(s, pred_x, 1); - - if (s->umvplus) - my = h263p_decode_umotion(s, pred_y); - else - my = h263_decode_motion(s, pred_y, 1); - - mot_val[0 ]= mot_val[2 ]= - mot_val[0+stride]= mot_val[2+stride]= mx; - mot_val[1 ]= mot_val[3 ]= - mot_val[1+stride]= mot_val[3+stride]= my; - } else { - s->current_picture.mb_type[xy]= MB_TYPE_8x8 | MB_TYPE_L0; - for(i=0;i<4;i++) { - mot_val = h263_pred_motion(s, i, 0, &pred_x, &pred_y); - if (s->umvplus) - mx = h263p_decode_umotion(s, pred_x); - else - mx = h263_decode_motion(s, pred_x, 1); - - if (s->umvplus) - my = h263p_decode_umotion(s, pred_y); - else - my = h263_decode_motion(s, pred_y, 1); - if (s->umvplus && (mx - pred_x) == 1 && (my - pred_y) == 1) - skip_bits1(&s->gb); /* Bit stuffing to prevent PSC */ - mot_val[0] = mx; - mot_val[1] = my; - } - } - } -end: - - for(i=0; i<4; i++) - s->block_index[i]-= 2; - for(i=4; i<6; i++) - s->block_index[i]-= 1; - s->mb_x--; - - s->gb= gb; -} - -static void h263_decode_dquant(MpegEncContext *s){ - static const int8_t quant_tab[4] = { -1, -2, 1, 2 }; - - if(s->modified_quant){ - if(get_bits1(&s->gb)) - s->qscale= modified_quant_tab[get_bits1(&s->gb)][ s->qscale ]; - else - s->qscale= get_bits(&s->gb, 5); - }else - s->qscale += quant_tab[get_bits(&s->gb, 2)]; - ff_set_qscale(s, s->qscale); -} - -static int h263_decode_block(MpegEncContext * s, DCTELEM * block, - int n, int coded) -{ - int code, level, i, j, last, run; - RLTable *rl = &ff_h263_rl_inter; - const uint8_t *scan_table; - GetBitContext gb= s->gb; - - scan_table = s->intra_scantable.permutated; - if (s->h263_aic && s->mb_intra) { - rl = &rl_intra_aic; - i = 0; - if (s->ac_pred) { - if (s->h263_aic_dir) - scan_table = s->intra_v_scantable.permutated; /* left */ - else - scan_table = s->intra_h_scantable.permutated; /* top */ - } - } else if (s->mb_intra) { - /* DC coef */ - if(s->codec_id == CODEC_ID_RV10){ -#if CONFIG_RV10_DECODER - if (s->rv10_version == 3 && s->pict_type == FF_I_TYPE) { - int component, diff; - component = (n <= 3 ? 0 : n - 4 + 1); - level = s->last_dc[component]; - if (s->rv10_first_dc_coded[component]) { - diff = rv_decode_dc(s, n); - if (diff == 0xffff) - return -1; - level += diff; - level = level & 0xff; /* handle wrap round */ - s->last_dc[component] = level; - } else { - s->rv10_first_dc_coded[component] = 1; - } - } else { - level = get_bits(&s->gb, 8); - if (level == 255) - level = 128; - } -#endif - }else{ - level = get_bits(&s->gb, 8); - if((level&0x7F) == 0){ - av_log(s->avctx, AV_LOG_ERROR, "illegal dc %d at %d %d\n", level, s->mb_x, s->mb_y); - if(s->error_recognition >= FF_ER_COMPLIANT) - return -1; - } - if (level == 255) - level = 128; - } - block[0] = level; - i = 1; - } else { - i = 0; - } - if (!coded) { - if (s->mb_intra && s->h263_aic) - goto not_coded; - s->block_last_index[n] = i - 1; - return 0; - } -retry: - for(;;) { - code = get_vlc2(&s->gb, rl->vlc.table, TEX_VLC_BITS, 2); - if (code < 0){ - av_log(s->avctx, AV_LOG_ERROR, "illegal ac vlc code at %dx%d\n", s->mb_x, s->mb_y); - return -1; - } - if (code == rl->n) { - /* escape */ - if (CONFIG_FLV_DECODER && s->h263_flv > 1) { - ff_flv2_decode_ac_esc(&s->gb, &level, &run, &last); - } else { - last = get_bits1(&s->gb); - run = get_bits(&s->gb, 6); - level = (int8_t)get_bits(&s->gb, 8); - if(level == -128){ - if (s->codec_id == CODEC_ID_RV10) { - /* XXX: should patch encoder too */ - level = get_sbits(&s->gb, 12); - }else{ - level = get_bits(&s->gb, 5); - level |= get_sbits(&s->gb, 6)<<5; - } - } - } - } else { - run = rl->table_run[code]; - level = rl->table_level[code]; - last = code >= rl->last; - if (get_bits1(&s->gb)) - level = -level; - } - i += run; - if (i >= 64){ - if(s->alt_inter_vlc && rl == &ff_h263_rl_inter && !s->mb_intra){ - //Looks like a hack but no, it's the way it is supposed to work ... - rl = &rl_intra_aic; - i = 0; - s->gb= gb; - s->dsp.clear_block(block); - goto retry; - } - av_log(s->avctx, AV_LOG_ERROR, "run overflow at %dx%d i:%d\n", s->mb_x, s->mb_y, s->mb_intra); - return -1; - } - j = scan_table[i]; - block[j] = level; - if (last) - break; - i++; - } -not_coded: - if (s->mb_intra && s->h263_aic) { - h263_pred_acdc(s, block, n); - i = 63; - } - s->block_last_index[n] = i; - return 0; -} - -static int h263_skip_b_part(MpegEncContext *s, int cbp) -{ - DECLARE_ALIGNED(16, DCTELEM, dblock[64]); - int i, mbi; - - /* we have to set s->mb_intra to zero to decode B-part of PB-frame correctly - * but real value should be restored in order to be used later (in OBMC condition) - */ - mbi = s->mb_intra; - s->mb_intra = 0; - for (i = 0; i < 6; i++) { - if (h263_decode_block(s, dblock, i, cbp&32) < 0) - return -1; - cbp+=cbp; - } - s->mb_intra = mbi; - return 0; -} - -static int h263_get_modb(GetBitContext *gb, int pb_frame, int *cbpb) -{ - int c, mv = 1; - - if (pb_frame < 3) { // h.263 Annex G and i263 PB-frame - c = get_bits1(gb); - if (pb_frame == 2 && c) - mv = !get_bits1(gb); - } else { // h.263 Annex M improved PB-frame - mv = get_unary(gb, 0, 4) + 1; - c = mv & 1; - mv = !!(mv & 2); - } - if(c) - *cbpb = get_bits(gb, 6); - return mv; -} - -int ff_h263_decode_mb(MpegEncContext *s, - DCTELEM block[6][64]) -{ - int cbpc, cbpy, i, cbp, pred_x, pred_y, mx, my, dquant; - int16_t *mot_val; - const int xy= s->mb_x + s->mb_y * s->mb_stride; - int cbpb = 0, pb_mv_count = 0; - - assert(!s->h263_pred); - - if (s->pict_type == FF_P_TYPE) { - do{ - if (get_bits1(&s->gb)) { - /* skip mb */ - s->mb_intra = 0; - for(i=0;i<6;i++) - s->block_last_index[i] = -1; - s->mv_dir = MV_DIR_FORWARD; - s->mv_type = MV_TYPE_16X16; - s->current_picture.mb_type[xy]= MB_TYPE_SKIP | MB_TYPE_16x16 | MB_TYPE_L0; - s->mv[0][0][0] = 0; - s->mv[0][0][1] = 0; - s->mb_skipped = !(s->obmc | s->loop_filter); - goto end; - } - cbpc = get_vlc2(&s->gb, ff_h263_inter_MCBPC_vlc.table, INTER_MCBPC_VLC_BITS, 2); - if (cbpc < 0){ - av_log(s->avctx, AV_LOG_ERROR, "cbpc damaged at %d %d\n", s->mb_x, s->mb_y); - return -1; - } - }while(cbpc == 20); - - s->dsp.clear_blocks(s->block[0]); - - dquant = cbpc & 8; - s->mb_intra = ((cbpc & 4) != 0); - if (s->mb_intra) goto intra; - - if(s->pb_frame && get_bits1(&s->gb)) - pb_mv_count = h263_get_modb(&s->gb, s->pb_frame, &cbpb); - cbpy = get_vlc2(&s->gb, ff_h263_cbpy_vlc.table, CBPY_VLC_BITS, 1); - - if(s->alt_inter_vlc==0 || (cbpc & 3)!=3) - cbpy ^= 0xF; - - cbp = (cbpc & 3) | (cbpy << 2); - if (dquant) { - h263_decode_dquant(s); - } - - s->mv_dir = MV_DIR_FORWARD; - if ((cbpc & 16) == 0) { - s->current_picture.mb_type[xy]= MB_TYPE_16x16 | MB_TYPE_L0; - /* 16x16 motion prediction */ - s->mv_type = MV_TYPE_16X16; - h263_pred_motion(s, 0, 0, &pred_x, &pred_y); - if (s->umvplus) - mx = h263p_decode_umotion(s, pred_x); - else - mx = h263_decode_motion(s, pred_x, 1); - - if (mx >= 0xffff) - return -1; - - if (s->umvplus) - my = h263p_decode_umotion(s, pred_y); - else - my = h263_decode_motion(s, pred_y, 1); - - if (my >= 0xffff) - return -1; - s->mv[0][0][0] = mx; - s->mv[0][0][1] = my; - - if (s->umvplus && (mx - pred_x) == 1 && (my - pred_y) == 1) - skip_bits1(&s->gb); /* Bit stuffing to prevent PSC */ - } else { - s->current_picture.mb_type[xy]= MB_TYPE_8x8 | MB_TYPE_L0; - s->mv_type = MV_TYPE_8X8; - for(i=0;i<4;i++) { - mot_val = h263_pred_motion(s, i, 0, &pred_x, &pred_y); - if (s->umvplus) - mx = h263p_decode_umotion(s, pred_x); - else - mx = h263_decode_motion(s, pred_x, 1); - if (mx >= 0xffff) - return -1; - - if (s->umvplus) - my = h263p_decode_umotion(s, pred_y); - else - my = h263_decode_motion(s, pred_y, 1); - if (my >= 0xffff) - return -1; - s->mv[0][i][0] = mx; - s->mv[0][i][1] = my; - if (s->umvplus && (mx - pred_x) == 1 && (my - pred_y) == 1) - skip_bits1(&s->gb); /* Bit stuffing to prevent PSC */ - mot_val[0] = mx; - mot_val[1] = my; - } - } - } else if(s->pict_type==FF_B_TYPE) { - int mb_type; - const int stride= s->b8_stride; - int16_t *mot_val0 = s->current_picture.motion_val[0][ 2*(s->mb_x + s->mb_y*stride) ]; - int16_t *mot_val1 = s->current_picture.motion_val[1][ 2*(s->mb_x + s->mb_y*stride) ]; -// const int mv_xy= s->mb_x + 1 + s->mb_y * s->mb_stride; - - //FIXME ugly - mot_val0[0 ]= mot_val0[2 ]= mot_val0[0+2*stride]= mot_val0[2+2*stride]= - mot_val0[1 ]= mot_val0[3 ]= mot_val0[1+2*stride]= mot_val0[3+2*stride]= - mot_val1[0 ]= mot_val1[2 ]= mot_val1[0+2*stride]= mot_val1[2+2*stride]= - mot_val1[1 ]= mot_val1[3 ]= mot_val1[1+2*stride]= mot_val1[3+2*stride]= 0; - - do{ - mb_type= get_vlc2(&s->gb, h263_mbtype_b_vlc.table, H263_MBTYPE_B_VLC_BITS, 2); - if (mb_type < 0){ - av_log(s->avctx, AV_LOG_ERROR, "b mb_type damaged at %d %d\n", s->mb_x, s->mb_y); - return -1; - } - - mb_type= h263_mb_type_b_map[ mb_type ]; - }while(!mb_type); - - s->mb_intra = IS_INTRA(mb_type); - if(HAS_CBP(mb_type)){ - s->dsp.clear_blocks(s->block[0]); - cbpc = get_vlc2(&s->gb, cbpc_b_vlc.table, CBPC_B_VLC_BITS, 1); - if(s->mb_intra){ - dquant = IS_QUANT(mb_type); - goto intra; - } - - cbpy = get_vlc2(&s->gb, ff_h263_cbpy_vlc.table, CBPY_VLC_BITS, 1); - - if (cbpy < 0){ - av_log(s->avctx, AV_LOG_ERROR, "b cbpy damaged at %d %d\n", s->mb_x, s->mb_y); - return -1; - } - - if(s->alt_inter_vlc==0 || (cbpc & 3)!=3) - cbpy ^= 0xF; - - cbp = (cbpc & 3) | (cbpy << 2); - }else - cbp=0; - - assert(!s->mb_intra); - - if(IS_QUANT(mb_type)){ - h263_decode_dquant(s); - } - - if(IS_DIRECT(mb_type)){ - s->mv_dir = MV_DIR_FORWARD | MV_DIR_BACKWARD | MV_DIRECT; - mb_type |= ff_mpeg4_set_direct_mv(s, 0, 0); - }else{ - s->mv_dir = 0; - s->mv_type= MV_TYPE_16X16; -//FIXME UMV - - if(USES_LIST(mb_type, 0)){ - int16_t *mot_val= h263_pred_motion(s, 0, 0, &mx, &my); - s->mv_dir = MV_DIR_FORWARD; - - mx = h263_decode_motion(s, mx, 1); - my = h263_decode_motion(s, my, 1); - - s->mv[0][0][0] = mx; - s->mv[0][0][1] = my; - mot_val[0 ]= mot_val[2 ]= mot_val[0+2*stride]= mot_val[2+2*stride]= mx; - mot_val[1 ]= mot_val[3 ]= mot_val[1+2*stride]= mot_val[3+2*stride]= my; - } - - if(USES_LIST(mb_type, 1)){ - int16_t *mot_val= h263_pred_motion(s, 0, 1, &mx, &my); - s->mv_dir |= MV_DIR_BACKWARD; - - mx = h263_decode_motion(s, mx, 1); - my = h263_decode_motion(s, my, 1); - - s->mv[1][0][0] = mx; - s->mv[1][0][1] = my; - mot_val[0 ]= mot_val[2 ]= mot_val[0+2*stride]= mot_val[2+2*stride]= mx; - mot_val[1 ]= mot_val[3 ]= mot_val[1+2*stride]= mot_val[3+2*stride]= my; - } - } - - s->current_picture.mb_type[xy]= mb_type; - } else { /* I-Frame */ - do{ - cbpc = get_vlc2(&s->gb, ff_h263_intra_MCBPC_vlc.table, INTRA_MCBPC_VLC_BITS, 2); - if (cbpc < 0){ - av_log(s->avctx, AV_LOG_ERROR, "I cbpc damaged at %d %d\n", s->mb_x, s->mb_y); - return -1; - } - }while(cbpc == 8); - - s->dsp.clear_blocks(s->block[0]); - - dquant = cbpc & 4; - s->mb_intra = 1; -intra: - s->current_picture.mb_type[xy]= MB_TYPE_INTRA; - if (s->h263_aic) { - s->ac_pred = get_bits1(&s->gb); - if(s->ac_pred){ - s->current_picture.mb_type[xy]= MB_TYPE_INTRA | MB_TYPE_ACPRED; - - s->h263_aic_dir = get_bits1(&s->gb); - } - }else - s->ac_pred = 0; - - if(s->pb_frame && get_bits1(&s->gb)) - pb_mv_count = h263_get_modb(&s->gb, s->pb_frame, &cbpb); - cbpy = get_vlc2(&s->gb, ff_h263_cbpy_vlc.table, CBPY_VLC_BITS, 1); - if(cbpy<0){ - av_log(s->avctx, AV_LOG_ERROR, "I cbpy damaged at %d %d\n", s->mb_x, s->mb_y); - return -1; - } - cbp = (cbpc & 3) | (cbpy << 2); - if (dquant) { - h263_decode_dquant(s); - } - - pb_mv_count += !!s->pb_frame; - } - - while(pb_mv_count--){ - h263_decode_motion(s, 0, 1); - h263_decode_motion(s, 0, 1); - } - - /* decode each block */ - for (i = 0; i < 6; i++) { - if (h263_decode_block(s, block[i], i, cbp&32) < 0) - return -1; - cbp+=cbp; - } - - if(s->pb_frame && h263_skip_b_part(s, cbpb) < 0) - return -1; - if(s->obmc && !s->mb_intra){ - if(s->pict_type == FF_P_TYPE && s->mb_x+1mb_width && s->mb_num_left != 1) - preview_obmc(s); - } -end: - - /* per-MB end of slice check */ - { - int v= show_bits(&s->gb, 16); - - if(get_bits_count(&s->gb) + 16 > s->gb.size_in_bits){ - v>>= get_bits_count(&s->gb) + 16 - s->gb.size_in_bits; - } - - if(v==0) - return SLICE_END; - } - - return SLICE_OK; -} - -/* most is hardcoded. should extend to handle all h263 streams */ -int h263_decode_picture_header(MpegEncContext *s) -{ - int format, width, height, i; - uint32_t startcode; - - align_get_bits(&s->gb); - - startcode= get_bits(&s->gb, 22-8); - - for(i= get_bits_left(&s->gb); i>24; i-=8) { - startcode = ((startcode << 8) | get_bits(&s->gb, 8)) & 0x003FFFFF; - - if(startcode == 0x20) - break; - } - - if (startcode != 0x20) { - av_log(s->avctx, AV_LOG_ERROR, "Bad picture start code\n"); - return -1; - } - /* temporal reference */ - i = get_bits(&s->gb, 8); /* picture timestamp */ - if( (s->picture_number&~0xFF)+i < s->picture_number) - i+= 256; - s->current_picture_ptr->pts= - s->picture_number= (s->picture_number&~0xFF) + i; - - /* PTYPE starts here */ - if (get_bits1(&s->gb) != 1) { - /* marker */ - av_log(s->avctx, AV_LOG_ERROR, "Bad marker\n"); - return -1; - } - if (get_bits1(&s->gb) != 0) { - av_log(s->avctx, AV_LOG_ERROR, "Bad H263 id\n"); - return -1; /* h263 id */ - } - skip_bits1(&s->gb); /* split screen off */ - skip_bits1(&s->gb); /* camera off */ - skip_bits1(&s->gb); /* freeze picture release off */ - - format = get_bits(&s->gb, 3); - /* - 0 forbidden - 1 sub-QCIF - 10 QCIF - 7 extended PTYPE (PLUSPTYPE) - */ - - if (format != 7 && format != 6) { - s->h263_plus = 0; - /* H.263v1 */ - width = h263_format[format][0]; - height = h263_format[format][1]; - if (!width) - return -1; - - s->pict_type = FF_I_TYPE + get_bits1(&s->gb); - - s->h263_long_vectors = get_bits1(&s->gb); - - if (get_bits1(&s->gb) != 0) { - av_log(s->avctx, AV_LOG_ERROR, "H263 SAC not supported\n"); - return -1; /* SAC: off */ - } - s->obmc= get_bits1(&s->gb); /* Advanced prediction mode */ - s->unrestricted_mv = s->h263_long_vectors || s->obmc; - - s->pb_frame = get_bits1(&s->gb); - s->chroma_qscale= s->qscale = get_bits(&s->gb, 5); - skip_bits1(&s->gb); /* Continuous Presence Multipoint mode: off */ - - s->width = width; - s->height = height; - s->avctx->sample_aspect_ratio= (AVRational){12,11}; - s->avctx->time_base= (AVRational){1001, 30000}; - } else { - int ufep; - - /* H.263v2 */ - s->h263_plus = 1; - ufep = get_bits(&s->gb, 3); /* Update Full Extended PTYPE */ - - /* ufep other than 0 and 1 are reserved */ - if (ufep == 1) { - /* OPPTYPE */ - format = get_bits(&s->gb, 3); - dprintf(s->avctx, "ufep=1, format: %d\n", format); - s->custom_pcf= get_bits1(&s->gb); - s->umvplus = get_bits1(&s->gb); /* Unrestricted Motion Vector */ - if (get_bits1(&s->gb) != 0) { - av_log(s->avctx, AV_LOG_ERROR, "Syntax-based Arithmetic Coding (SAC) not supported\n"); - } - s->obmc= get_bits1(&s->gb); /* Advanced prediction mode */ - s->h263_aic = get_bits1(&s->gb); /* Advanced Intra Coding (AIC) */ - s->loop_filter= get_bits1(&s->gb); - s->unrestricted_mv = s->umvplus || s->obmc || s->loop_filter; - - s->h263_slice_structured= get_bits1(&s->gb); - if (get_bits1(&s->gb) != 0) { - av_log(s->avctx, AV_LOG_ERROR, "Reference Picture Selection not supported\n"); - } - if (get_bits1(&s->gb) != 0) { - av_log(s->avctx, AV_LOG_ERROR, "Independent Segment Decoding not supported\n"); - } - s->alt_inter_vlc= get_bits1(&s->gb); - s->modified_quant= get_bits1(&s->gb); - if(s->modified_quant) - s->chroma_qscale_table= ff_h263_chroma_qscale_table; - - skip_bits(&s->gb, 1); /* Prevent start code emulation */ - - skip_bits(&s->gb, 3); /* Reserved */ - } else if (ufep != 0) { - av_log(s->avctx, AV_LOG_ERROR, "Bad UFEP type (%d)\n", ufep); - return -1; - } - - /* MPPTYPE */ - s->pict_type = get_bits(&s->gb, 3); - switch(s->pict_type){ - case 0: s->pict_type= FF_I_TYPE;break; - case 1: s->pict_type= FF_P_TYPE;break; - case 2: s->pict_type= FF_P_TYPE;s->pb_frame = 3;break; - case 3: s->pict_type= FF_B_TYPE;break; - case 7: s->pict_type= FF_I_TYPE;break; //ZYGO - default: - return -1; - } - skip_bits(&s->gb, 2); - s->no_rounding = get_bits1(&s->gb); - skip_bits(&s->gb, 4); - - /* Get the picture dimensions */ - if (ufep) { - if (format == 6) { - /* Custom Picture Format (CPFMT) */ - s->aspect_ratio_info = get_bits(&s->gb, 4); - dprintf(s->avctx, "aspect: %d\n", s->aspect_ratio_info); - /* aspect ratios: - 0 - forbidden - 1 - 1:1 - 2 - 12:11 (CIF 4:3) - 3 - 10:11 (525-type 4:3) - 4 - 16:11 (CIF 16:9) - 5 - 40:33 (525-type 16:9) - 6-14 - reserved - */ - width = (get_bits(&s->gb, 9) + 1) * 4; - skip_bits1(&s->gb); - height = get_bits(&s->gb, 9) * 4; - dprintf(s->avctx, "\nH.263+ Custom picture: %dx%d\n",width,height); - if (s->aspect_ratio_info == FF_ASPECT_EXTENDED) { - /* aspected dimensions */ - s->avctx->sample_aspect_ratio.num= get_bits(&s->gb, 8); - s->avctx->sample_aspect_ratio.den= get_bits(&s->gb, 8); - }else{ - s->avctx->sample_aspect_ratio= ff_h263_pixel_aspect[s->aspect_ratio_info]; - } - } else { - width = h263_format[format][0]; - height = h263_format[format][1]; - s->avctx->sample_aspect_ratio= (AVRational){12,11}; - } - if ((width == 0) || (height == 0)) - return -1; - s->width = width; - s->height = height; - - if(s->custom_pcf){ - int gcd; - s->avctx->time_base.den= 1800000; - s->avctx->time_base.num= 1000 + get_bits1(&s->gb); - s->avctx->time_base.num*= get_bits(&s->gb, 7); - if(s->avctx->time_base.num == 0){ - av_log(s, AV_LOG_ERROR, "zero framerate\n"); - return -1; - } - gcd= av_gcd(s->avctx->time_base.den, s->avctx->time_base.num); - s->avctx->time_base.den /= gcd; - s->avctx->time_base.num /= gcd; - }else{ - s->avctx->time_base= (AVRational){1001, 30000}; - } - } - - if(s->custom_pcf){ - skip_bits(&s->gb, 2); //extended Temporal reference - } - - if (ufep) { - if (s->umvplus) { - if(get_bits1(&s->gb)==0) /* Unlimited Unrestricted Motion Vectors Indicator (UUI) */ - skip_bits1(&s->gb); - } - if(s->h263_slice_structured){ - if (get_bits1(&s->gb) != 0) { - av_log(s->avctx, AV_LOG_ERROR, "rectangular slices not supported\n"); - } - if (get_bits1(&s->gb) != 0) { - av_log(s->avctx, AV_LOG_ERROR, "unordered slices not supported\n"); - } - } - } - - s->qscale = get_bits(&s->gb, 5); - } - - s->mb_width = (s->width + 15) / 16; - s->mb_height = (s->height + 15) / 16; - s->mb_num = s->mb_width * s->mb_height; - - if (s->pb_frame) { - skip_bits(&s->gb, 3); /* Temporal reference for B-pictures */ - if (s->custom_pcf) - skip_bits(&s->gb, 2); //extended Temporal reference - skip_bits(&s->gb, 2); /* Quantization information for B-pictures */ - } - - /* PEI */ - while (get_bits1(&s->gb) != 0) { - skip_bits(&s->gb, 8); - } - - if(s->h263_slice_structured){ - if (get_bits1(&s->gb) != 1) { - av_log(s->avctx, AV_LOG_ERROR, "SEPB1 marker missing\n"); - return -1; - } - - ff_h263_decode_mba(s); - - if (get_bits1(&s->gb) != 1) { - av_log(s->avctx, AV_LOG_ERROR, "SEPB2 marker missing\n"); - return -1; - } - } - s->f_code = 1; - - if(s->h263_aic){ - s->y_dc_scale_table= - s->c_dc_scale_table= ff_aic_dc_scale_table; - }else{ - s->y_dc_scale_table= - s->c_dc_scale_table= ff_mpeg1_dc_scale_table; - } - - ff_h263_show_pict_info(s); - if (s->pict_type == FF_I_TYPE && s->codec_tag == AV_RL32("ZYGO")){ - int i,j; - for(i=0; i<85; i++) av_log(s->avctx, AV_LOG_DEBUG, "%d", get_bits1(&s->gb)); - av_log(s->avctx, AV_LOG_DEBUG, "\n"); - for(i=0; i<13; i++){ - for(j=0; j<3; j++){ - int v= get_bits(&s->gb, 8); - v |= get_sbits(&s->gb, 8)<<8; - av_log(s->avctx, AV_LOG_DEBUG, " %5d", v); - } - av_log(s->avctx, AV_LOG_DEBUG, "\n"); - } - for(i=0; i<50; i++) av_log(s->avctx, AV_LOG_DEBUG, "%d", get_bits1(&s->gb)); - } - - return 0; -} - - -- cgit v1.2.3