Пример #1
0
static int decode_slice(MpegEncContext *s){
    const int part_mask= s->partitioned_frame ? (ER_AC_END|ER_AC_ERROR) : 0x7F;
    const int mb_size= 16>>s->avctx->lowres;
    s->last_resync_gb= s->gb;
    s->first_slice_line= 1;

    s->resync_mb_x= s->mb_x;
    s->resync_mb_y= s->mb_y;

    ff_set_qscale(s, s->qscale);

    if (s->avctx->hwaccel) {
        const uint8_t *start= s->gb.buffer + get_bits_count(&s->gb)/8;
        const uint8_t *end  = ff_h263_find_resync_marker(start + 1, s->gb.buffer_end);
        skip_bits_long(&s->gb, 8*(end - start));
        return s->avctx->hwaccel->decode_slice(s->avctx, start, end - start);
    }

    if(s->partitioned_frame){
        const int qscale= s->qscale;

        if(CONFIG_MPEG4_DECODER && s->codec_id==CODEC_ID_MPEG4){
            if(ff_mpeg4_decode_partitions(s) < 0)
                return -1;
        }

        /* restore variables which were modified */
        s->first_slice_line=1;
        s->mb_x= s->resync_mb_x;
        s->mb_y= s->resync_mb_y;
        ff_set_qscale(s, qscale);
    }

    for(; s->mb_y < s->mb_height; s->mb_y++) {
        /* per-row end of slice checks */
        if(s->msmpeg4_version){
            if(s->resync_mb_y + s->slice_height == s->mb_y){
                ff_er_add_slice(s, s->resync_mb_x, s->resync_mb_y, s->mb_x-1, s->mb_y, ER_MB_END);

                return 0;
            }
        }

        if(s->msmpeg4_version==1){
            s->last_dc[0]=
            s->last_dc[1]=
            s->last_dc[2]= 128;
        }

        ff_init_block_index(s);
        for(; s->mb_x < s->mb_width; s->mb_x++) {
            int ret;

            ff_update_block_index(s);

            if(s->resync_mb_x == s->mb_x && s->resync_mb_y+1 == s->mb_y){
                s->first_slice_line=0;
            }

            /* DCT & quantize */

            s->mv_dir = MV_DIR_FORWARD;
            s->mv_type = MV_TYPE_16X16;
//            s->mb_skipped = 0;
//printf("%d %d %06X\n", ret, get_bits_count(&s->gb), show_bits(&s->gb, 24));
            ret= s->decode_mb(s, s->block);

            if (s->pict_type!=AV_PICTURE_TYPE_B)
                ff_h263_update_motion_val(s);

            if(ret<0){
                const int xy= s->mb_x + s->mb_y*s->mb_stride;
                if(ret==SLICE_END){
                    MPV_decode_mb(s, s->block);
                    if(s->loop_filter)
                        ff_h263_loop_filter(s);

//printf("%d %d %d %06X\n", s->mb_x, s->mb_y, s->gb.size*8 - get_bits_count(&s->gb), show_bits(&s->gb, 24));
                    ff_er_add_slice(s, s->resync_mb_x, s->resync_mb_y, s->mb_x, s->mb_y, ER_MB_END&part_mask);

                    s->padding_bug_score--;

                    if(++s->mb_x >= s->mb_width){
                        s->mb_x=0;
                        ff_draw_horiz_band(s, s->mb_y*mb_size, mb_size);
                        MPV_report_decode_progress(s);
                        s->mb_y++;
                    }
                    return 0;
                }else if(ret==SLICE_NOEND){
                    av_log(s->avctx, AV_LOG_ERROR, "Slice mismatch at MB: %d\n", xy);
                    ff_er_add_slice(s, s->resync_mb_x, s->resync_mb_y, s->mb_x+1, s->mb_y, ER_MB_END&part_mask);
                    return -1;
                }
                av_log(s->avctx, AV_LOG_ERROR, "Error at MB: %d\n", xy);
                ff_er_add_slice(s, s->resync_mb_x, s->resync_mb_y, s->mb_x, s->mb_y, ER_MB_ERROR&part_mask);

                return -1;
            }

            MPV_decode_mb(s, s->block);
            if(s->loop_filter)
                ff_h263_loop_filter(s);
        }

        ff_draw_horiz_band(s, s->mb_y*mb_size, mb_size);
        MPV_report_decode_progress(s);

        s->mb_x= 0;
    }

    assert(s->mb_x==0 && s->mb_y==s->mb_height);

    if(s->codec_id==CODEC_ID_MPEG4
       && (s->workaround_bugs&FF_BUG_AUTODETECT)
       && get_bits_left(&s->gb) >= 48
       && show_bits(&s->gb, 24)==0x4010
       && !s->data_partitioning)
        s->padding_bug_score+=32;

    /* try to detect the padding bug */
    if(      s->codec_id==CODEC_ID_MPEG4
       &&   (s->workaround_bugs&FF_BUG_AUTODETECT)
       &&    get_bits_left(&s->gb) >=0
       &&    get_bits_left(&s->gb) < 48
//       &&   !s->resync_marker
       &&   !s->data_partitioning){

        const int bits_count= get_bits_count(&s->gb);
        const int bits_left = s->gb.size_in_bits - bits_count;

        if(bits_left==0){
            s->padding_bug_score+=16;
        } else if(bits_left != 1){
            int v= show_bits(&s->gb, 8);
            v|= 0x7F >> (7-(bits_count&7));

            if(v==0x7F && bits_left<=8)
                s->padding_bug_score--;
            else if(v==0x7F && ((get_bits_count(&s->gb)+8)&8) && bits_left<=16)
                s->padding_bug_score+= 4;
            else
                s->padding_bug_score++;
        }
    }
Пример #2
0
static int decode_slice(MpegEncContext *s)
{
    const int part_mask = s->partitioned_frame
                          ? (ER_AC_END | ER_AC_ERROR) : 0x7F;
    const int mb_size   = 16 >> s->avctx->lowres;
    int ret;

    s->last_resync_gb   = s->gb;
    s->first_slice_line = 1;
    s->resync_mb_x      = s->mb_x;
    s->resync_mb_y      = s->mb_y;

    ff_set_qscale(s, s->qscale);

    if (s->studio_profile) {
        if ((ret = ff_mpeg4_decode_studio_slice_header(s->avctx->priv_data)) < 0)
            return ret;
    }

    if (s->avctx->hwaccel) {
        const uint8_t *start = s->gb.buffer + get_bits_count(&s->gb) / 8;
        ret = s->avctx->hwaccel->decode_slice(s->avctx, start, s->gb.buffer_end - start);
        // ensure we exit decode loop
        s->mb_y = s->mb_height;
        return ret;
    }

    if (s->partitioned_frame) {
        const int qscale = s->qscale;

        if (CONFIG_MPEG4_DECODER && s->codec_id == AV_CODEC_ID_MPEG4)
            if ((ret = ff_mpeg4_decode_partitions(s->avctx->priv_data)) < 0)
                return ret;

        /* restore variables which were modified */
        s->first_slice_line = 1;
        s->mb_x             = s->resync_mb_x;
        s->mb_y             = s->resync_mb_y;
        ff_set_qscale(s, qscale);
    }

    for (; s->mb_y < s->mb_height; s->mb_y++) {
        /* per-row end of slice checks */
        if (s->msmpeg4_version) {
            if (s->resync_mb_y + s->slice_height == s->mb_y) {
                ff_er_add_slice(&s->er, s->resync_mb_x, s->resync_mb_y,
                                s->mb_x - 1, s->mb_y, ER_MB_END);

                return 0;
            }
        }

        if (s->msmpeg4_version == 1) {
            s->last_dc[0] =
            s->last_dc[1] =
            s->last_dc[2] = 128;
        }

        ff_init_block_index(s);
        for (; s->mb_x < s->mb_width; s->mb_x++) {
            int ret;

            ff_update_block_index(s);

            if (s->resync_mb_x == s->mb_x && s->resync_mb_y + 1 == s->mb_y)
                s->first_slice_line = 0;

            /* DCT & quantize */

            s->mv_dir  = MV_DIR_FORWARD;
            s->mv_type = MV_TYPE_16X16;
            ff_dlog(s, "%d %06X\n",
                    get_bits_count(&s->gb), show_bits(&s->gb, 24));

            ff_tlog(NULL, "Decoding MB at %dx%d\n", s->mb_x, s->mb_y);
            ret = s->decode_mb(s, s->block);

            if (s->pict_type != AV_PICTURE_TYPE_B)
                ff_h263_update_motion_val(s);

            if (ret < 0) {
                const int xy = s->mb_x + s->mb_y * s->mb_stride;
                if (ret == SLICE_END) {
                    ff_mpv_reconstruct_mb(s, s->block);
                    if (s->loop_filter)
                        ff_h263_loop_filter(s);

                    ff_er_add_slice(&s->er, s->resync_mb_x, s->resync_mb_y,
                                    s->mb_x, s->mb_y, ER_MB_END & part_mask);

                    s->padding_bug_score--;

                    if (++s->mb_x >= s->mb_width) {
                        s->mb_x = 0;
                        ff_mpeg_draw_horiz_band(s, s->mb_y * mb_size, mb_size);
                        ff_mpv_report_decode_progress(s);
                        s->mb_y++;
                    }
                    return 0;
                } else if (ret == SLICE_NOEND) {
                    av_log(s->avctx, AV_LOG_ERROR,
                           "Slice mismatch at MB: %d\n", xy);
                    ff_er_add_slice(&s->er, s->resync_mb_x, s->resync_mb_y,
                                    s->mb_x + 1, s->mb_y,
                                    ER_MB_END & part_mask);
                    return AVERROR_INVALIDDATA;
                }
                av_log(s->avctx, AV_LOG_ERROR, "Error at MB: %d\n", xy);
                ff_er_add_slice(&s->er, s->resync_mb_x, s->resync_mb_y,
                                s->mb_x, s->mb_y, ER_MB_ERROR & part_mask);

                if (s->avctx->err_recognition & AV_EF_IGNORE_ERR)
                    continue;
                return AVERROR_INVALIDDATA;
            }

            ff_mpv_reconstruct_mb(s, s->block);
            if (s->loop_filter)
                ff_h263_loop_filter(s);
        }

        ff_mpeg_draw_horiz_band(s, s->mb_y * mb_size, mb_size);
        ff_mpv_report_decode_progress(s);

        s->mb_x = 0;
    }

    av_assert1(s->mb_x == 0 && s->mb_y == s->mb_height);

    // Detect incorrect padding with wrong stuffing codes used by NEC N-02B
    if (s->codec_id == AV_CODEC_ID_MPEG4         &&
        (s->workaround_bugs & FF_BUG_AUTODETECT) &&
        get_bits_left(&s->gb) >= 48              &&
        show_bits(&s->gb, 24) == 0x4010          &&
        !s->data_partitioning)
        s->padding_bug_score += 32;

    /* try to detect the padding bug */
    if (s->codec_id == AV_CODEC_ID_MPEG4         &&
        (s->workaround_bugs & FF_BUG_AUTODETECT) &&
        get_bits_left(&s->gb) >= 0               &&
        get_bits_left(&s->gb) < 137              &&
        !s->data_partitioning) {
        const int bits_count = get_bits_count(&s->gb);
        const int bits_left  = s->gb.size_in_bits - bits_count;

        if (bits_left == 0) {
            s->padding_bug_score += 16;
        } else if (bits_left != 1) {
            int v = show_bits(&s->gb, 8);
            v |= 0x7F >> (7 - (bits_count & 7));

            if (v == 0x7F && bits_left <= 8)
                s->padding_bug_score--;
            else if (v == 0x7F && ((get_bits_count(&s->gb) + 8) & 8) &&
                     bits_left <= 16)
                s->padding_bug_score += 4;
            else
                s->padding_bug_score++;
        }
    }
Пример #3
0
static int rv10_decode_packet(AVCodecContext *avctx,
                             const uint8_t *buf, int buf_size)
{
    MpegEncContext *s = avctx->priv_data;
    int mb_count, mb_pos, left, start_mb_x;

    init_get_bits(&s->gb, buf, buf_size*8);
    if(s->codec_id ==CODEC_ID_RV10)
        mb_count = rv10_decode_picture_header(s);
    else
        mb_count = rv20_decode_picture_header(s);
    if (mb_count < 0) {
        av_log(s->avctx, AV_LOG_ERROR, "HEADER ERROR\n");
        return -1;
    }

    if (s->mb_x >= s->mb_width ||
        s->mb_y >= s->mb_height) {
        av_log(s->avctx, AV_LOG_ERROR, "POS ERROR %d %d\n", s->mb_x, s->mb_y);
        return -1;
    }
    mb_pos = s->mb_y * s->mb_width + s->mb_x;
    left = s->mb_width * s->mb_height - mb_pos;
    if (mb_count > left) {
        av_log(s->avctx, AV_LOG_ERROR, "COUNT ERROR\n");
        return -1;
    }
//if(s->pict_type == FF_P_TYPE) return 0;

    if ((s->mb_x == 0 && s->mb_y == 0) || s->current_picture_ptr==NULL) {
        if(s->current_picture_ptr){ //FIXME write parser so we always have complete frames?
            ff_er_frame_end(s);
            MPV_frame_end(s);
            s->mb_x= s->mb_y = s->resync_mb_x = s->resync_mb_y= 0;
        }
        if(MPV_frame_start(s, avctx) < 0)
            return -1;
        ff_er_frame_start(s);
    }

#ifdef DEBUG
    av_log(avctx, AV_LOG_DEBUG, "qscale=%d\n", s->qscale);
#endif

    /* default quantization values */
    if(s->codec_id== CODEC_ID_RV10){
        if(s->mb_y==0) s->first_slice_line=1;
    }else{
        s->first_slice_line=1;
        s->resync_mb_x= s->mb_x;
    }
    start_mb_x= s->mb_x;
    s->resync_mb_y= s->mb_y;
    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;
    }

    if(s->modified_quant)
        s->chroma_qscale_table= ff_h263_chroma_qscale_table;

    ff_set_qscale(s, s->qscale);

    s->rv10_first_dc_coded[0] = 0;
    s->rv10_first_dc_coded[1] = 0;
    s->rv10_first_dc_coded[2] = 0;
//printf("%d %X %X\n", s->pict_type, s->current_picture.motion_val[0], s->current_picture.motion_val[1]);
    s->block_wrap[0]=
    s->block_wrap[1]=
    s->block_wrap[2]=
    s->block_wrap[3]= s->b8_stride;
    s->block_wrap[4]=
    s->block_wrap[5]= s->mb_stride;
    ff_init_block_index(s);
    /* decode each macroblock */

    for(s->mb_num_left= mb_count; s->mb_num_left>0; s->mb_num_left--) {
        int ret;
        ff_update_block_index(s);
#ifdef DEBUG
        av_log(avctx, AV_LOG_DEBUG, "**mb x=%d y=%d\n", s->mb_x, s->mb_y);
#endif

        s->mv_dir = MV_DIR_FORWARD;
        s->mv_type = MV_TYPE_16X16;
        ret=ff_h263_decode_mb(s, s->block);

        if (ret == SLICE_ERROR || s->gb.size_in_bits < get_bits_count(&s->gb)) {
            av_log(s->avctx, AV_LOG_ERROR, "ERROR at MB %d %d\n", s->mb_x, s->mb_y);
            return -1;
        }
        if(s->pict_type != FF_B_TYPE)
            ff_h263_update_motion_val(s);
        MPV_decode_mb(s, s->block);
        if(s->loop_filter)
            ff_h263_loop_filter(s);

        if (++s->mb_x == s->mb_width) {
            s->mb_x = 0;
            s->mb_y++;
            ff_init_block_index(s);
        }
        if(s->mb_x == s->resync_mb_x)
            s->first_slice_line=0;
        if(ret == SLICE_END) break;
    }

    ff_er_add_slice(s, start_mb_x, s->resync_mb_y, s->mb_x-1, s->mb_y, AC_END|DC_END|MV_END);

    return buf_size;
}
Пример #4
0
static int decode_slice(MpegEncContext *s){
    const int part_mask= s->partitioned_frame ? (AC_END|AC_ERROR) : 0x7F;
    s->last_resync_gb= s->gb;
    s->first_slice_line= 1;
        
    s->resync_mb_x= s->mb_x;
    s->resync_mb_y= s->mb_y;

    ff_set_qscale(s, s->qscale);
    
    if(s->partitioned_frame){
        const int qscale= s->qscale;

        if(s->codec_id==CODEC_ID_MPEG4){
            if(ff_mpeg4_decode_partitions(s) < 0)
                return -1; 
        }
        
        /* restore variables which were modified */
        s->first_slice_line=1;
        s->mb_x= s->resync_mb_x;
        s->mb_y= s->resync_mb_y;
        ff_set_qscale(s, qscale);
    }

    for(; s->mb_y < s->mb_height; s->mb_y++) {
        /* per-row end of slice checks */
        if(s->msmpeg4_version){
            if(s->resync_mb_y + s->slice_height == s->mb_y){
                ff_er_add_slice(s, s->resync_mb_x, s->resync_mb_y, s->mb_x-1, s->mb_y, AC_END|DC_END|MV_END);

                return 0;
            }
        }
        
        if(s->msmpeg4_version==1){
            s->last_dc[0]=
            s->last_dc[1]=
            s->last_dc[2]= 128;
        }
    
        ff_init_block_index(s);
        for(; s->mb_x < s->mb_width; s->mb_x++) {
            int ret;

            ff_update_block_index(s);

            if(s->resync_mb_x == s->mb_x && s->resync_mb_y+1 == s->mb_y){
                s->first_slice_line=0; 
            }

            /* DCT & quantize */
	    s->dsp.clear_blocks(s->block[0]);
            
            s->mv_dir = MV_DIR_FORWARD;
            s->mv_type = MV_TYPE_16X16;
//            s->mb_skiped = 0;
//printf("%d %d %06X\n", ret, get_bits_count(&s->gb), show_bits(&s->gb, 24));
            ret= s->decode_mb(s, s->block);

            if (s->pict_type!=B_TYPE)
                ff_h263_update_motion_val(s);

            if(ret<0){
                const int xy= s->mb_x + s->mb_y*s->mb_stride;
                if(ret==SLICE_END){
                    MPV_decode_mb(s, s->block);
                    if(s->loop_filter)
                        ff_h263_loop_filter(s);

//printf("%d %d %d %06X\n", s->mb_x, s->mb_y, s->gb.size*8 - get_bits_count(&s->gb), show_bits(&s->gb, 24));
                    ff_er_add_slice(s, s->resync_mb_x, s->resync_mb_y, s->mb_x, s->mb_y, (AC_END|DC_END|MV_END)&part_mask);

                    s->padding_bug_score--;
                        
                    if(++s->mb_x >= s->mb_width){
                        s->mb_x=0;
                        ff_draw_horiz_band(s, s->mb_y*16, 16);
                        s->mb_y++;
                    }
                    return 0; 
                }else if(ret==SLICE_NOEND){
                    av_log(s->avctx, AV_LOG_ERROR, "Slice mismatch at MB: %d\n", xy);
                    ff_er_add_slice(s, s->resync_mb_x, s->resync_mb_y, s->mb_x+1, s->mb_y, (AC_END|DC_END|MV_END)&part_mask);
                    return -1;
                }
                av_log(s->avctx, AV_LOG_ERROR, "Error at MB: %d\n", xy);
                ff_er_add_slice(s, s->resync_mb_x, s->resync_mb_y, s->mb_x, s->mb_y, (AC_ERROR|DC_ERROR|MV_ERROR)&part_mask);
    
                return -1;
            }

            MPV_decode_mb(s, s->block);
            if(s->loop_filter)
                ff_h263_loop_filter(s);
        }
        
        ff_draw_horiz_band(s, s->mb_y*16, 16);
        
        s->mb_x= 0;
    }
    
    assert(s->mb_x==0 && s->mb_y==s->mb_height);

    /* try to detect the padding bug */
    if(      s->codec_id==CODEC_ID_MPEG4
       &&   (s->workaround_bugs&FF_BUG_AUTODETECT) 
       &&    s->gb.size_in_bits - get_bits_count(&s->gb) >=0
       &&    s->gb.size_in_bits - get_bits_count(&s->gb) < 48
//       &&   !s->resync_marker
       &&   !s->data_partitioning){
        
        const int bits_count= get_bits_count(&s->gb);
        const int bits_left = s->gb.size_in_bits - bits_count;
        
        if(bits_left==0){
            s->padding_bug_score+=16;
        }else if(bits_left>8){
            s->padding_bug_score++;
        } else if(bits_left != 1){
            int v= show_bits(&s->gb, 8);
            v|= 0x7F >> (7-(bits_count&7));

            if(v==0x7F)
                s->padding_bug_score--;
            else
                s->padding_bug_score++;            
        }                          
    }