diff options
author | Diego Biurrun <diego@biurrun.de> | 2009-12-30 17:34:14 +0300 |
---|---|---|
committer | Diego Biurrun <diego@biurrun.de> | 2009-12-30 17:34:14 +0300 |
commit | 1436f3170944449348daa7d1f9fc57f44aa76c40 (patch) | |
tree | 61cdb54c4b5b10f8f539264799b008728dd4a2dc /libavcodec/h263.c | |
parent | 8380edd947793740d8a17969c8bd7b797a7e256f (diff) |
cosmetics: Move H.263-related functions around to avoid forward declarations.
Originally committed as revision 20978 to svn://svn.ffmpeg.org/ffmpeg/trunk
Diffstat (limited to 'libavcodec/h263.c')
-rw-r--r-- | libavcodec/h263.c | 806 |
1 files changed, 398 insertions, 408 deletions
diff --git a/libavcodec/h263.c b/libavcodec/h263.c index e7ef981d77..158b737429 100644 --- a/libavcodec/h263.c +++ b/libavcodec/h263.c @@ -56,10 +56,6 @@ #define H263_MBTYPE_B_VLC_BITS 6 #define CBPC_B_VLC_BITS 3 -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 inline int mpeg4_decode_dc(MpegEncContext * s, int n, int *dir_ptr); static inline int mpeg4_decode_block(MpegEncContext * s, DCTELEM * block, int n, int coded, int intra, int rvlc); @@ -68,10 +64,6 @@ static void mpeg4_decode_sprite_trajectory(MpegEncContext * s, GetBitContext *gb static inline int ff_mpeg4_pred_dc(MpegEncContext * s, int n, int level, int *dir_ptr, int encoding); #if CONFIG_ENCODERS -static void h263_encode_block(MpegEncContext *s, DCTELEM *block, int n); -static void h263p_encode_umotion(MpegEncContext *s, int val); -static int h263_pred_dc(MpegEncContext *s, int n, int16_t **dc_val_ptr); - static void mpeg4_encode_visual_object_header(MpegEncContext *s); static void mpeg4_encode_vol_header(MpegEncContext *s, int vo_number, int vol_number); @@ -1244,6 +1236,213 @@ void mpeg4_encode_mb(MpegEncContext * s, } } +/** + * 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 = &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(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{ + if(level < 64) { // 7-bit level + put_bits(&s->pb, 1, 0); + put_bits(&s->pb, 1, last); + put_bits(&s->pb, 6, run); + + put_sbits(&s->pb, 7, slevel); + } else { + /* 11-bit level */ + put_bits(&s->pb, 1, 1); + put_bits(&s->pb, 1, last); + put_bits(&s->pb, 6, run); + + put_sbits(&s->pb, 11, slevel); + } + } + } 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 x, y, wrap, a, c, pred_dc; + int16_t *dc_val; + + /* find prediction */ + if (n < 4) { + x = 2 * s->mb_x + (n & 1); + y = 2 * s->mb_y + ((n & 2) >> 1); + wrap = s->b8_stride; + dc_val = s->dc_val[0]; + } else { + x = s->mb_x; + y = s->mb_y; + wrap = s->mb_stride; + dc_val = s->dc_val[n - 4 + 1]; + } + /* B C + * A X + */ + a = dc_val[(x - 1) + (y) * wrap]; + c = dc_val[(x) + (y - 1) * wrap]; + + /* No prediction outside GOB boundary */ + if(s->first_slice_line && n!=3){ + if(n!=2) c= 1024; + if(n!=1 && s->mb_x == s->resync_mb_x) a= 1024; + } + /* just DC prediction */ + if (a != 1024 && c != 1024) + pred_dc = (a + c) >> 1; + else if (a != 1024) + pred_dc = a; + else + pred_dc = c; + + /* we assume pred is positive */ + *dc_val_ptr = &dc_val[x + y * wrap]; + return pred_dc; +} + void h263_encode_mb(MpegEncContext * s, DCTELEM block[6][64], int motion_x, int motion_y) @@ -1533,49 +1732,6 @@ void ff_h263_loop_filter(MpegEncContext * s){ } } -#if CONFIG_ENCODERS -static 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; - - /* find prediction */ - if (n < 4) { - x = 2 * s->mb_x + (n & 1); - y = 2 * s->mb_y + ((n & 2) >> 1); - wrap = s->b8_stride; - dc_val = s->dc_val[0]; - } else { - x = s->mb_x; - y = s->mb_y; - wrap = s->mb_stride; - dc_val = s->dc_val[n - 4 + 1]; - } - /* B C - * A X - */ - a = dc_val[(x - 1) + (y) * wrap]; - c = dc_val[(x) + (y - 1) * wrap]; - - /* No prediction outside GOB boundary */ - if(s->first_slice_line && n!=3){ - if(n!=2) c= 1024; - if(n!=1 && s->mb_x == s->resync_mb_x) a= 1024; - } - /* just DC prediction */ - if (a != 1024 && c != 1024) - pred_dc = (a + c) >> 1; - else if (a != 1024) - pred_dc = a; - else - pred_dc = c; - - /* we assume pred is positive */ - *dc_val_ptr = &dc_val[x + y * wrap]; - return pred_dc; -} -#endif /* CONFIG_ENCODERS */ - static void h263_pred_acdc(MpegEncContext * s, DCTELEM *block, int n) { int x, y, wrap, a, c, pred_dc, scale, i; @@ -1751,44 +1907,6 @@ void ff_h263_encode_motion(MpegEncContext * s, int val, int f_code) } } -/* 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 void init_mv_penalty_and_fcode(MpegEncContext *s) { int f_code; @@ -2100,134 +2218,6 @@ void h263_encode_init(MpegEncContext *s) } } -/** - * 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 = &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(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{ - if(level < 64) { // 7-bit level - put_bits(&s->pb, 1, 0); - put_bits(&s->pb, 1, last); - put_bits(&s->pb, 6, run); - - put_sbits(&s->pb, 7, slevel); - } else { - /* 11-bit level */ - put_bits(&s->pb, 1, 1); - put_bits(&s->pb, 1, last); - put_bits(&s->pb, 6, run); - - put_sbits(&s->pb, 11, slevel); - } - } - } else { - put_bits(&s->pb, 1, sign); - } - last_non_zero = i; - } - } -} - /***************************************************/ /** * add mpeg4 stuffing bits (01...1) @@ -3325,6 +3315,43 @@ int ff_h263_resync(MpegEncContext *s){ return -1; } +static 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)>>l; + } else { + /* horrible h263 long vector mode */ + if (pred < -31 && val < -63) + val += 64; + if (pred > 32 && val > 63) + val -= 64; + + } + return val; +} + /** * gets the average motion vector for a GMC MB. * @param n either 0 for the x component or 1 for y @@ -3762,6 +3789,30 @@ static int mpeg4_decode_partitioned_mb(MpegEncContext *s, DCTELEM block[6][64]) } } +/* 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 :) */ @@ -3870,6 +3921,136 @@ static void h263_decode_dquant(MpegEncContext *s){ 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 = &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 (s->h263_flv > 1) { + int is11 = get_bits1(&s->gb); + last = get_bits1(&s->gb); + run = get_bits(&s->gb, 6); + if(is11){ + level = get_sbits(&s->gb, 11); + } else { + level = get_sbits(&s->gb, 7); + } + } 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 == &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]); @@ -4501,197 +4682,6 @@ end: return SLICE_OK; } -static 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)>>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; - -} - -static int h263_decode_block(MpegEncContext * s, DCTELEM * block, - int n, int coded) -{ - int code, level, i, j, last, run; - RLTable *rl = &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 (s->h263_flv > 1) { - int is11 = get_bits1(&s->gb); - last = get_bits1(&s->gb); - run = get_bits(&s->gb, 6); - if(is11){ - level = get_sbits(&s->gb, 11); - } else { - level = get_sbits(&s->gb, 7); - } - } 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 == &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; -} - /** * decodes the dc value. * @param n block index (0-3 are luma, 4-5 are chroma) |