/*
- * H263/MPEG4 backend for ffmpeg encoder and decoder
+ * H.263/MPEG-4 backend for encoder and decoder
* Copyright (c) 2000,2001 Fabrice Bellard
- * H263+ support.
+ * H.263+ support.
* Copyright (c) 2001 Juan J. Sierralta P
* Copyright (c) 2002-2004 Michael Niedermayer <michaelni@gmx.at>
*
- * ac prediction encoding, B-frame support, error resilience, optimizations,
- * qpel decoding, gmc decoding, interlaced decoding
- * by Michael Niedermayer <michaelni@gmx.at>
+ * This file is part of Libav.
*
- * This file is part of FFmpeg.
- *
- * FFmpeg is free software; you can redistribute it and/or
+ * Libav is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
- * FFmpeg is distributed in the hope that it will be useful,
+ * Libav is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
- * License along with FFmpeg; if not, write to the Free Software
+ * License along with Libav; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
/**
- * @file libavcodec/h263.c
- * h263/mpeg4 codec.
+ * @file
+ * H.263/MPEG-4 codec.
*/
-//#define DEBUG
#include <limits.h>
-#include "dsputil.h"
#include "avcodec.h"
#include "mpegvideo.h"
#include "h263.h"
#include "h263data.h"
#include "mathops.h"
-#include "unary.h"
+#include "mpegutils.h"
#include "flv.h"
#include "mpeg4video.h"
-//#undef NDEBUG
-//#include <assert.h>
-
-// 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; 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 != 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;
- }
- }
- }
-}
-
-#endif //CONFIG_ENCODERS
-
-#define tab_size ((signed)FF_ARRAY_ELEMS(s->direct_scale_mv[0]))
-#define tab_bias (tab_size/2)
-
-//used by mpeg4 and rv10 decoder
-void ff_mpeg4_init_direct_mv(MpegEncContext *s){
- int i;
- for(i=0; i<tab_size; i++){
- s->direct_scale_mv[0][i] = (i-tab_bias)*s->pb_time/s->pp_time;
- s->direct_scale_mv[1][i] = (i-tab_bias)*(s->pb_time-s->pp_time)/s->pp_time;
- }
-}
-
-static inline void ff_mpeg4_set_one_direct_mv(MpegEncContext *s, int mx, int my, int i){
- int xy= s->block_index[i];
- uint16_t time_pp= s->pp_time;
- uint16_t time_pb= s->pb_time;
- int p_mx, p_my;
-
- p_mx= s->next_picture.motion_val[0][xy][0];
- if((unsigned)(p_mx + tab_bias) < tab_size){
- s->mv[0][i][0] = s->direct_scale_mv[0][p_mx + tab_bias] + mx;
- s->mv[1][i][0] = mx ? s->mv[0][i][0] - p_mx
- : s->direct_scale_mv[1][p_mx + tab_bias];
- }else{
- s->mv[0][i][0] = p_mx*time_pb/time_pp + mx;
- s->mv[1][i][0] = mx ? s->mv[0][i][0] - p_mx
- : p_mx*(time_pb - time_pp)/time_pp;
- }
- p_my= s->next_picture.motion_val[0][xy][1];
- if((unsigned)(p_my + tab_bias) < tab_size){
- s->mv[0][i][1] = s->direct_scale_mv[0][p_my + tab_bias] + my;
- s->mv[1][i][1] = my ? s->mv[0][i][1] - p_my
- : s->direct_scale_mv[1][p_my + tab_bias];
- }else{
- s->mv[0][i][1] = p_my*time_pb/time_pp + my;
- s->mv[1][i][1] = my ? s->mv[0][i][1] - p_my
- : p_my*(time_pb - time_pp)/time_pp;
- }
-}
-
-#undef tab_size
-#undef tab_bias
-
-/**
- *
- * @return the mb_type
- */
-int ff_mpeg4_set_direct_mv(MpegEncContext *s, int mx, int my){
- const int mb_index= s->mb_x + s->mb_y*s->mb_stride;
- const int colocated_mb_type= s->next_picture.mb_type[mb_index];
- uint16_t time_pp;
- uint16_t time_pb;
- int i;
-
- //FIXME avoid divides
- // try special case with shifts for 1 and 3 B-frames?
-
- if(IS_8X8(colocated_mb_type)){
- s->mv_type = MV_TYPE_8X8;
- for(i=0; i<4; i++){
- ff_mpeg4_set_one_direct_mv(s, mx, my, i);
- }
- return MB_TYPE_DIRECT2 | MB_TYPE_8x8 | MB_TYPE_L0L1;
- } else if(IS_INTERLACED(colocated_mb_type)){
- s->mv_type = MV_TYPE_FIELD;
- for(i=0; i<2; i++){
- int field_select= s->next_picture.ref_index[0][s->block_index[2*i]];
- s->field_select[0][i]= field_select;
- s->field_select[1][i]= i;
- if(s->top_field_first){
- time_pp= s->pp_field_time - field_select + i;
- time_pb= s->pb_field_time - field_select + i;
- }else{
- time_pp= s->pp_field_time + field_select - i;
- time_pb= s->pb_field_time + field_select - i;
- }
- s->mv[0][i][0] = s->p_field_mv_table[i][0][mb_index][0]*time_pb/time_pp + mx;
- s->mv[0][i][1] = s->p_field_mv_table[i][0][mb_index][1]*time_pb/time_pp + my;
- s->mv[1][i][0] = mx ? s->mv[0][i][0] - s->p_field_mv_table[i][0][mb_index][0]
- : s->p_field_mv_table[i][0][mb_index][0]*(time_pb - time_pp)/time_pp;
- s->mv[1][i][1] = my ? s->mv[0][i][1] - s->p_field_mv_table[i][0][mb_index][1]
- : s->p_field_mv_table[i][0][mb_index][1]*(time_pb - time_pp)/time_pp;
- }
- return MB_TYPE_DIRECT2 | MB_TYPE_16x8 | MB_TYPE_L0L1 | MB_TYPE_INTERLACED;
- }else{
- ff_mpeg4_set_one_direct_mv(s, mx, my, 0);
- s->mv[0][1][0] = s->mv[0][2][0] = s->mv[0][3][0] = s->mv[0][0][0];
- s->mv[0][1][1] = s->mv[0][2][1] = s->mv[0][3][1] = s->mv[0][0][1];
- s->mv[1][1][0] = s->mv[1][2][0] = s->mv[1][3][0] = s->mv[1][0][0];
- s->mv[1][1][1] = s->mv[1][2][1] = s->mv[1][3][1] = s->mv[1][0][1];
- if((s->avctx->workaround_bugs & FF_BUG_DIRECT_BLOCKSIZE) || !s->quarter_sample)
- s->mv_type= MV_TYPE_16X16;
- else
- s->mv_type= MV_TYPE_8X8;
- return MB_TYPE_DIRECT2 | MB_TYPE_16x16 | MB_TYPE_L0L1; //Note see prev line
- }
-}
void ff_h263_update_motion_val(MpegEncContext * s){
const int mb_xy = s->mb_y * s->mb_stride + s->mb_x;
const int wrap = s->b8_stride;
const int xy = s->block_index[0];
- s->current_picture.mbskip_table[mb_xy]= s->mb_skipped;
+ s->current_picture.mbskip_table[mb_xy] = s->mb_skipped;
if(s->mv_type != MV_TYPE_8X8){
int motion_x, motion_y;
s->p_field_mv_table[i][0][mb_xy][0]= s->mv[0][i][0];
s->p_field_mv_table[i][0][mb_xy][1]= s->mv[0][i][1];
}
- s->current_picture.ref_index[0][xy ]=
- s->current_picture.ref_index[0][xy + 1]= s->field_select[0][0];
- s->current_picture.ref_index[0][xy + wrap ]=
- s->current_picture.ref_index[0][xy + wrap + 1]= s->field_select[0][1];
+ s->current_picture.ref_index[0][4*mb_xy ] =
+ s->current_picture.ref_index[0][4*mb_xy + 1] = s->field_select[0][0];
+ s->current_picture.ref_index[0][4*mb_xy + 2] =
+ s->current_picture.ref_index[0][4*mb_xy + 3] = s->field_select[0][1];
}
/* no update if 8X8 because it has been done during parsing */
- s->current_picture.motion_val[0][xy][0] = motion_x;
- s->current_picture.motion_val[0][xy][1] = motion_y;
- s->current_picture.motion_val[0][xy + 1][0] = motion_x;
- s->current_picture.motion_val[0][xy + 1][1] = motion_y;
- s->current_picture.motion_val[0][xy + wrap][0] = motion_x;
- s->current_picture.motion_val[0][xy + wrap][1] = motion_y;
+ s->current_picture.motion_val[0][xy][0] = motion_x;
+ s->current_picture.motion_val[0][xy][1] = motion_y;
+ s->current_picture.motion_val[0][xy + 1][0] = motion_x;
+ s->current_picture.motion_val[0][xy + 1][1] = motion_y;
+ s->current_picture.motion_val[0][xy + wrap][0] = motion_x;
+ s->current_picture.motion_val[0][xy + wrap][1] = motion_y;
s->current_picture.motion_val[0][xy + 1 + wrap][0] = motion_x;
s->current_picture.motion_val[0][xy + 1 + wrap][1] = motion_y;
}
if(s->encoding){ //FIXME encoding MUST be cleaned up
if (s->mv_type == MV_TYPE_8X8)
- s->current_picture.mb_type[mb_xy]= MB_TYPE_L0 | MB_TYPE_8x8;
+ s->current_picture.mb_type[mb_xy] = MB_TYPE_L0 | MB_TYPE_8x8;
else if(s->mb_intra)
- s->current_picture.mb_type[mb_xy]= MB_TYPE_INTRA;
- else
- s->current_picture.mb_type[mb_xy]= MB_TYPE_L0 | MB_TYPE_16x16;
- }
-}
-
-#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 = &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);
+ s->current_picture.mb_type[mb_xy] = MB_TYPE_INTRA;
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);
+ s->current_picture.mb_type[mb_xy] = MB_TYPE_L0 | MB_TYPE_16x16;
}
}
-static int h263_pred_dc(MpegEncContext * s, int n, int16_t **dc_val_ptr)
+int ff_h263_pred_dc(MpegEncContext * s, int n, int16_t **dc_val_ptr)
{
int x, y, wrap, a, c, pred_dc;
int16_t *dc_val;
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,
- inter_MCBPC_bits[cbpc],
- inter_MCBPC_code[cbpc]);
-
- put_bits(&s->pb, cbpy_tab[cbpy][1], 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,
- inter_MCBPC_bits[cbpc+16],
- inter_MCBPC_code[cbpc+16]);
- put_bits(&s->pb, cbpy_tab[cbpy][1], 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,
- intra_MCBPC_bits[cbpc],
- intra_MCBPC_code[cbpc]);
- } else {
- if(s->dquant) cbpc+=8;
- put_bits(&s->pb, 1, 0); /* mb coded */
- put_bits(&s->pb,
- inter_MCBPC_bits[cbpc + 4],
- 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, cbpy_tab[cbpy][1], 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;
uint8_t *dest_cb= s->dest[1];
uint8_t *dest_cr= s->dest[2];
-// if(s->pict_type==FF_B_TYPE && !s->readable) return;
+// if(s->pict_type==AV_PICTURE_TYPE_B && !s->readable) return;
/*
Diag Top
Left Center
*/
- if(!IS_SKIP(s->current_picture.mb_type[xy])){
+ if (!IS_SKIP(s->current_picture.mb_type[xy])) {
qp_c= s->qscale;
- s->dsp.h263_v_loop_filter(dest_y+8*linesize , linesize, qp_c);
- s->dsp.h263_v_loop_filter(dest_y+8*linesize+8, linesize, qp_c);
+ s->h263dsp.h263_v_loop_filter(dest_y + 8 * linesize, linesize, qp_c);
+ s->h263dsp.h263_v_loop_filter(dest_y + 8 * linesize + 8, linesize, qp_c);
}else
qp_c= 0;
if(s->mb_y){
int qp_dt, qp_tt, qp_tc;
- if(IS_SKIP(s->current_picture.mb_type[xy-s->mb_stride]))
+ if (IS_SKIP(s->current_picture.mb_type[xy - s->mb_stride]))
qp_tt=0;
else
- qp_tt= s->current_picture.qscale_table[xy-s->mb_stride];
+ qp_tt = s->current_picture.qscale_table[xy - s->mb_stride];
if(qp_c)
qp_tc= qp_c;
if(qp_tc){
const int chroma_qp= s->chroma_qscale_table[qp_tc];
- s->dsp.h263_v_loop_filter(dest_y , linesize, qp_tc);
- s->dsp.h263_v_loop_filter(dest_y+8, linesize, qp_tc);
+ s->h263dsp.h263_v_loop_filter(dest_y, linesize, qp_tc);
+ s->h263dsp.h263_v_loop_filter(dest_y + 8, linesize, qp_tc);
- s->dsp.h263_v_loop_filter(dest_cb , uvlinesize, chroma_qp);
- s->dsp.h263_v_loop_filter(dest_cr , uvlinesize, chroma_qp);
+ s->h263dsp.h263_v_loop_filter(dest_cb, uvlinesize, chroma_qp);
+ s->h263dsp.h263_v_loop_filter(dest_cr, uvlinesize, chroma_qp);
}
if(qp_tt)
- s->dsp.h263_h_loop_filter(dest_y-8*linesize+8 , linesize, qp_tt);
+ s->h263dsp.h263_h_loop_filter(dest_y - 8 * linesize + 8, linesize, qp_tt);
if(s->mb_x){
- if(qp_tt || IS_SKIP(s->current_picture.mb_type[xy-1-s->mb_stride]))
+ if (qp_tt || IS_SKIP(s->current_picture.mb_type[xy - 1 - s->mb_stride]))
qp_dt= qp_tt;
else
- qp_dt= s->current_picture.qscale_table[xy-1-s->mb_stride];
+ qp_dt = s->current_picture.qscale_table[xy - 1 - s->mb_stride];
if(qp_dt){
const int chroma_qp= s->chroma_qscale_table[qp_dt];
- s->dsp.h263_h_loop_filter(dest_y -8*linesize , linesize, qp_dt);
- s->dsp.h263_h_loop_filter(dest_cb-8*uvlinesize, uvlinesize, chroma_qp);
- s->dsp.h263_h_loop_filter(dest_cr-8*uvlinesize, uvlinesize, chroma_qp);
+ s->h263dsp.h263_h_loop_filter(dest_y - 8 * linesize, linesize, qp_dt);
+ s->h263dsp.h263_h_loop_filter(dest_cb - 8 * uvlinesize, uvlinesize, chroma_qp);
+ s->h263dsp.h263_h_loop_filter(dest_cr - 8 * uvlinesize, uvlinesize, chroma_qp);
}
}
}
if(qp_c){
- s->dsp.h263_h_loop_filter(dest_y +8, linesize, qp_c);
+ s->h263dsp.h263_h_loop_filter(dest_y + 8, linesize, qp_c);
if(s->mb_y + 1 == s->mb_height)
- s->dsp.h263_h_loop_filter(dest_y+8*linesize+8, linesize, qp_c);
+ s->h263dsp.h263_h_loop_filter(dest_y + 8 * linesize + 8, linesize, qp_c);
}
if(s->mb_x){
int qp_lc;
- if(qp_c || IS_SKIP(s->current_picture.mb_type[xy-1]))
+ if (qp_c || IS_SKIP(s->current_picture.mb_type[xy - 1]))
qp_lc= qp_c;
else
- qp_lc= s->current_picture.qscale_table[xy-1];
+ qp_lc = s->current_picture.qscale_table[xy - 1];
if(qp_lc){
- s->dsp.h263_h_loop_filter(dest_y, linesize, qp_lc);
+ s->h263dsp.h263_h_loop_filter(dest_y, linesize, qp_lc);
if(s->mb_y + 1 == s->mb_height){
const int chroma_qp= s->chroma_qscale_table[qp_lc];
- s->dsp.h263_h_loop_filter(dest_y +8* linesize, linesize, qp_lc);
- s->dsp.h263_h_loop_filter(dest_cb , uvlinesize, chroma_qp);
- s->dsp.h263_h_loop_filter(dest_cr , uvlinesize, chroma_qp);
+ s->h263dsp.h263_h_loop_filter(dest_y + 8 * linesize, linesize, qp_lc);
+ s->h263dsp.h263_h_loop_filter(dest_cb, uvlinesize, chroma_qp);
+ s->h263dsp.h263_h_loop_filter(dest_cr, uvlinesize, chroma_qp);
}
}
}
}
-static void h263_pred_acdc(MpegEncContext * s, DCTELEM *block, int n)
+void ff_h263_pred_acdc(MpegEncContext * s, int16_t *block, int n)
{
int x, y, wrap, a, c, pred_dc, scale, i;
int16_t *dc_val, *ac_val, *ac_val1;
if (a != 1024) {
ac_val -= 16;
for(i=1;i<8;i++) {
- block[s->dsp.idct_permutation[i<<3]] += ac_val[i];
+ block[s->idsp.idct_permutation[i << 3]] += ac_val[i];
}
pred_dc = a;
}
if (c != 1024) {
ac_val -= 16 * wrap;
for(i=1;i<8;i++) {
- block[s->dsp.idct_permutation[i ]] += ac_val[i + 8];
+ block[s->idsp.idct_permutation[i]] += ac_val[i + 8];
}
pred_dc = c;
}
/* left copy */
for(i=1;i<8;i++)
- ac_val1[i ] = block[s->dsp.idct_permutation[i<<3]];
+ ac_val1[i] = block[s->idsp.idct_permutation[i << 3]];
/* top copy */
for(i=1;i<8;i++)
- ac_val1[8 + i] = block[s->dsp.idct_permutation[i ]];
+ ac_val1[8 + i] = block[s->idsp.idct_permutation[i]];
}
-int16_t *h263_pred_motion(MpegEncContext * s, int block, int dir,
- int *px, int *py)
+int16_t *ff_h263_pred_motion(MpegEncContext * s, int block, int dir,
+ int *px, int *py)
{
int wrap;
int16_t *A, *B, *C, (*mot_val)[2];
A = mot_val[ - 1];
/* special case for first (slice) line */
if (s->first_slice_line && block<3) {
- // we can't just change some MVs to simulate that as we need them for the B frames (and ME)
+ // we can't just change some MVs to simulate that as we need them for the B-frames (and ME)
// and if we ever support non rectangular objects than we need to do a few ifs here anyway :(
if(block==0){ //most common case
if(s->mb_x == s->resync_mb_x){ //rare
}
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)>>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<<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 void init_uni_h263_rl_tab(RLTable *rl, uint32_t *bits_tab, uint8_t *len_tab){
- int slevel, run, last;
-
- assert(MAX_LEVEL >= 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(&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(&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 intra_MCBPC_vlc;
-VLC inter_MCBPC_vlc;
-VLC 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(&intra_MCBPC_vlc, INTRA_MCBPC_VLC_BITS, 9,
- intra_MCBPC_bits, 1, 1,
- intra_MCBPC_code, 1, 1, 72);
- INIT_VLC_STATIC(&inter_MCBPC_vlc, INTER_MCBPC_VLC_BITS, 28,
- inter_MCBPC_bits, 1, 1,
- inter_MCBPC_code, 1, 1, 198);
- INIT_VLC_STATIC(&cbpy_vlc, CBPY_VLC_BITS, 16,
- &cbpy_tab[0][1], 2, 1,
- &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(&rl_inter, static_rl_table_store[0]);
- init_rl(&rl_intra_aic, static_rl_table_store[1]);
- INIT_VLC_RL(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.
- */
-int ff_h263_get_gob_height(MpegEncContext *s){
- if (s->height <= 400)
- return 1;
- else if (s->height <= 800)
- return 2;
- 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;i<n;i++)
- tab[i] = val;
-}
-
-/**
- * finds the next resync_marker
- * @param p pointer to buffer to scan
- * @param end pointer to the end of the buffer
- * @return pointer to the next resync_marker, or end if none was found
- */
-const uint8_t *ff_h263_find_resync_marker(const uint8_t *restrict p, const uint8_t * restrict end)
-{
- assert(p < end);
-
- end-=2;
- p++;
- for(;p<end; p+=2){
- if(!*p){
- if (!p[-1] && p[1]) return p - 1;
- else if(!p[ 1] && p[2]) return p;
- }
- }
- return end+2;
-}
-
-/**
- * decodes the group of blocks / video packet header.
- * @return bit position of the resync_marker, or <0 if none was found
- */
-int ff_h263_resync(MpegEncContext *s){
- int left, pos, ret;
-
- if(s->codec_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)>>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, 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, 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 = &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 == &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, 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, 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, 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, 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, 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+1<s->mb_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;
-}
-
-
projects / ffmpeg / blobdiff