0,0 → 1,839 |
/* |
* ITU H263 bitstream encoder |
* Copyright (c) 2000,2001 Fabrice Bellard |
* H263+ support. |
* Copyright (c) 2001 Juan J. Sierralta P |
* Copyright (c) 2002-2004 Michael Niedermayer <michaelni@gmx.at> |
* |
* This file is part of FFmpeg. |
* |
* FFmpeg is free software; you can redistribute it and/or |
* modify it under the terms of the GNU Lesser General Public |
* License as published by the Free Software Foundation; either |
* version 2.1 of the License, or (at your option) any later version. |
* |
* FFmpeg is distributed in the hope that it will be useful, |
* but WITHOUT ANY WARRANTY; without even the implied warranty of |
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
* Lesser General Public License for more details. |
* |
* You should have received a copy of the GNU Lesser General Public |
* License along with FFmpeg; if not, write to the Free Software |
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
*/ |
|
/** |
* @file |
* h263 bitstream encoder. |
*/ |
|
#include <limits.h> |
|
#include "libavutil/attributes.h" |
#include "avcodec.h" |
#include "mpegvideo.h" |
#include "h263.h" |
#include "mathops.h" |
#include "unary.h" |
#include "flv.h" |
#include "mpeg4video.h" |
#include "internal.h" |
|
/** |
* 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)) |
|
static const uint8_t wrong_run[102] = { |
1, 2, 3, 5, 4, 10, 9, 8, |
11, 15, 17, 16, 23, 22, 21, 20, |
19, 18, 25, 24, 27, 26, 11, 7, |
6, 1, 2, 13, 2, 2, 2, 2, |
6, 12, 3, 9, 1, 3, 4, 3, |
7, 4, 1, 1, 5, 5, 14, 6, |
1, 7, 1, 8, 1, 1, 1, 1, |
10, 1, 1, 5, 9, 17, 25, 24, |
29, 33, 32, 41, 2, 23, 28, 31, |
3, 22, 30, 4, 27, 40, 8, 26, |
6, 39, 7, 38, 16, 37, 15, 10, |
11, 12, 13, 14, 1, 21, 20, 18, |
19, 2, 1, 34, 35, 36 |
}; |
|
/** |
* Return 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 ff_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; |
|
avpriv_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 = ff_match_2uint16(ff_h263_format, FF_ARRAY_ELEMS(ff_h263_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 == AV_PICTURE_TYPE_P)); |
/* 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 == 8) |
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 == AV_PICTURE_TYPE_P); |
|
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 == 8) { |
/* 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); |
|
av_assert1(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; |
} |
} |
|
/** |
* Encode a group of blocks header. |
*/ |
void ff_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 == AV_PICTURE_TYPE_I); /* 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 == AV_PICTURE_TYPE_I); /* GFID */ |
put_bits(&s->pb, 5, s->qscale); /* GQUANT */ |
} |
} |
|
/** |
* modify qscale so that encoding is actually 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; i<s->mb_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 != AV_CODEC_ID_H263P){ |
for(i=1; i<s->mb_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; |
} |
} |
} |
} |
|
static const int dquant_code[5]= {1,0,9,2,3}; |
|
/** |
* Encode an 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, int16_t * 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 = &ff_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(&ff_rl_intra_aic, last, run, level); |
inter_vlc_bits += rl->table_vlc[code][1]+1; |
aic_vlc_bits += ff_rl_intra_aic.table_vlc[aic_code][1]+1; |
|
if (code == rl->n) { |
inter_vlc_bits += 1+6+8-1; |
} |
if (aic_code == ff_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 = &ff_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); |
|
av_assert2(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); |
} |
} |
|
void ff_h263_encode_mb(MpegEncContext * s, |
int16_t 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 */ |
ff_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*/ |
ff_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 { |
av_assert2(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 = ff_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 == AV_PICTURE_TYPE_I) { |
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++; |
} |
} |
} |
|
void ff_h263_encode_motion(MpegEncContext * s, int val, int f_code) |
{ |
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 = f_code - 1; |
range = 1 << bit_size; |
/* modulo encoding */ |
val = sign_extend(val, 6 + bit_size); |
sign = val>>31; |
val= (val^sign)-sign; |
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); |
} |
} |
} |
|
static av_cold 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= ff_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= ff_mvtab[code][1] + 1 + bit_size; |
}else{ |
len= ff_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<<f_code); mv<(16<<f_code); mv++){ |
fcode_tab[mv+MAX_MV]= f_code; |
} |
} |
|
for(mv=0; mv<MAX_MV*2+1; mv++){ |
umv_fcode_tab[mv]= 1; |
} |
} |
|
static av_cold void init_uni_h263_rl_tab(RLTable *rl, uint32_t *bits_tab, |
uint8_t *len_tab) |
{ |
int slevel, run, last; |
|
av_assert0(MAX_LEVEL >= 64); |
av_assert0(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; |
} |
} |
} |
} |
} |
|
av_cold void ff_h263_encode_init(MpegEncContext *s) |
{ |
static int done = 0; |
|
if (!done) { |
done = 1; |
|
ff_init_rl(&ff_h263_rl_inter, ff_h263_static_rl_table_store[0]); |
ff_init_rl(&ff_rl_intra_aic, ff_h263_static_rl_table_store[1]); |
|
init_uni_h263_rl_tab(&ff_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 AV_CODEC_ID_MPEG4: |
s->fcode_tab= fcode_tab; |
break; |
case AV_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 AV_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; |
} |
} |
|
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); |
} |