split mpeg12 encoder out of mpeg12.c
[ffmpeg.git] / libavcodec / mpeg12.c
index c71092b..9477ce9 100644 (file)
@@ -1,5 +1,5 @@
 /*
- * MPEG1 codec / MPEG2 decoder
+ * MPEG1/2 decoder
  * Copyright (c) 2000,2001 Fabrice Bellard.
  * Copyright (c) 2002-2004 Michael Niedermayer <michaelni@gmx.at>
  *
@@ -22,7 +22,7 @@
 
 /**
  * @file mpeg12.c
- * MPEG1/2 codec
+ * MPEG1/2 decoder
  */
 
 //#define DEBUG
@@ -30,7 +30,9 @@
 #include "dsputil.h"
 #include "mpegvideo.h"
 
+#include "mpeg12.h"
 #include "mpeg12data.h"
+#include "mpeg12decdata.h"
 #include "bytestream.h"
 
 //#undef NDEBUG
 #define MB_BTYPE_VLC_BITS 6
 #define TEX_VLC_BITS 9
 
-#ifdef CONFIG_ENCODERS
-static void mpeg1_encode_block(MpegEncContext *s,
-                         DCTELEM *block,
-                         int component);
-static void mpeg1_encode_motion(MpegEncContext *s, int val, int f_or_b_code);    // RAL: f_code parameter added
-#endif //CONFIG_ENCODERS
 static inline int mpeg1_decode_block_inter(MpegEncContext *s,
                               DCTELEM *block,
                               int n);
@@ -81,22 +77,8 @@ static const enum PixelFormat pixfmt_xvmc_mpg2_420[] = {
                                            PIX_FMT_XVMC_MPEG2_IDCT,
                                            PIX_FMT_XVMC_MPEG2_MC,
                                            -1};
-#ifdef CONFIG_ENCODERS
-static uint8_t mv_penalty[MAX_FCODE+1][MAX_MV*2+1];
-static uint8_t fcode_tab[MAX_MV*2+1];
 
-static uint8_t  uni_mpeg1_ac_vlc_len [64*64*2];
-static uint8_t  uni_mpeg2_ac_vlc_len [64*64*2];
-
-/* simple include everything table for dc, first byte is bits number next 3 are code*/
-static uint32_t mpeg1_lum_dc_uni[512];
-static uint32_t mpeg1_chr_dc_uni[512];
-
-static uint8_t mpeg1_index_run[2][64];
-static int8_t mpeg1_max_level[2][64];
-#endif //CONFIG_ENCODERS
-
-static uint8_t static_rl_table_store[2][2][2*MAX_RUN + MAX_LEVEL + 3];
+uint8_t static_rl_table_store[2][2][2*MAX_RUN + MAX_LEVEL + 3];
 
 static void init_2d_vlc_rl(RLTable *rl, int use_static)
 {
@@ -140,260 +122,7 @@ static void init_2d_vlc_rl(RLTable *rl, int use_static)
     }
 }
 
-#ifdef CONFIG_ENCODERS
-static void init_uni_ac_vlc(RLTable *rl, uint8_t *uni_ac_vlc_len){
-    int i;
-
-    for(i=0; i<128; i++){
-        int level= i-64;
-        int run;
-        for(run=0; run<64; run++){
-            int len, bits, code;
-
-            int alevel= FFABS(level);
-            int sign= (level>>31)&1;
-
-            if (alevel > rl->max_level[0][run])
-                code= 111; /*rl->n*/
-            else
-                code= rl->index_run[0][run] + alevel - 1;
-
-            if (code < 111 /* rl->n */) {
-                /* store the vlc & sign at once */
-                len=   rl->table_vlc[code][1]+1;
-                bits= (rl->table_vlc[code][0]<<1) + sign;
-            } else {
-                len=  rl->table_vlc[111/*rl->n*/][1]+6;
-                bits= rl->table_vlc[111/*rl->n*/][0]<<6;
-
-                bits|= run;
-                if (alevel < 128) {
-                    bits<<=8; len+=8;
-                    bits|= level & 0xff;
-                } else {
-                    bits<<=16; len+=16;
-                    bits|= level & 0xff;
-                    if (level < 0) {
-                        bits|= 0x8001 + level + 255;
-                    } else {
-                        bits|= level & 0xffff;
-                    }
-                }
-            }
-
-            uni_ac_vlc_len [UNI_AC_ENC_INDEX(run, i)]= len;
-        }
-    }
-}
-
-
-static int find_frame_rate_index(MpegEncContext *s){
-    int i;
-    int64_t dmin= INT64_MAX;
-    int64_t d;
-
-    for(i=1;i<14;i++) {
-        int64_t n0= 1001LL/ff_frame_rate_tab[i].den*ff_frame_rate_tab[i].num*s->avctx->time_base.num;
-        int64_t n1= 1001LL*s->avctx->time_base.den;
-        if(s->avctx->strict_std_compliance > FF_COMPLIANCE_INOFFICIAL && i>=9) break;
-
-        d = FFABS(n0 - n1);
-        if(d < dmin){
-            dmin=d;
-            s->frame_rate_index= i;
-        }
-    }
-    if(dmin)
-        return -1;
-    else
-        return 0;
-}
-
-static int encode_init(AVCodecContext *avctx)
-{
-    MpegEncContext *s = avctx->priv_data;
-
-    if(MPV_encode_init(avctx) < 0)
-        return -1;
-
-    if(find_frame_rate_index(s) < 0){
-        if(s->strict_std_compliance > FF_COMPLIANCE_EXPERIMENTAL){
-            av_log(avctx, AV_LOG_ERROR, "MPEG1/2 does not support %d/%d fps\n", avctx->time_base.den, avctx->time_base.num);
-            return -1;
-        }else{
-            av_log(avctx, AV_LOG_INFO, "MPEG1/2 does not support %d/%d fps, there may be AV sync issues\n", avctx->time_base.den, avctx->time_base.num);
-        }
-    }
-
-    if(avctx->profile == FF_PROFILE_UNKNOWN){
-        if(avctx->level != FF_LEVEL_UNKNOWN){
-            av_log(avctx, AV_LOG_ERROR, "Set profile and level\n");
-            return -1;
-        }
-        avctx->profile = s->chroma_format == CHROMA_420 ? 4 : 0; /* Main or 4:2:2 */
-    }
-
-    if(avctx->level == FF_LEVEL_UNKNOWN){
-        if(avctx->profile == 0){ /* 4:2:2 */
-            if(avctx->width <= 720 && avctx->height <= 608) avctx->level = 5; /* Main */
-            else                                            avctx->level = 2; /* High */
-        }else{
-            if(avctx->profile != 1 && s->chroma_format != CHROMA_420){
-                av_log(avctx, AV_LOG_ERROR, "Only High(1) and 4:2:2(0) profiles support 4:2:2 color sampling\n");
-                return -1;
-            }
-            if(avctx->width <= 720 && avctx->height <= 576) avctx->level = 8; /* Main */
-            else if(avctx->width <= 1440)                   avctx->level = 6; /* High 1440 */
-            else                                            avctx->level = 4; /* High */
-        }
-    }
-
-    if((avctx->flags2 & CODEC_FLAG2_DROP_FRAME_TIMECODE) && s->frame_rate_index != 4){
-        av_log(avctx, AV_LOG_ERROR, "Drop frame time code only allowed with 1001/30000 fps\n");
-        return -1;
-    }
-
-    return 0;
-}
-
-static void put_header(MpegEncContext *s, int header)
-{
-    align_put_bits(&s->pb);
-    put_bits(&s->pb, 16, header>>16);
-    put_bits(&s->pb, 16, header&0xFFFF);
-}
-
-/* put sequence header if needed */
-static void mpeg1_encode_sequence_header(MpegEncContext *s)
-{
-        unsigned int vbv_buffer_size;
-        unsigned int fps, v;
-        int i;
-        uint64_t time_code;
-        float best_aspect_error= 1E10;
-        float aspect_ratio= av_q2d(s->avctx->sample_aspect_ratio);
-        int constraint_parameter_flag;
-
-        if(aspect_ratio==0.0) aspect_ratio= 1.0; //pixel aspect 1:1 (VGA)
-
-        if (s->current_picture.key_frame) {
-            AVRational framerate= ff_frame_rate_tab[s->frame_rate_index];
-
-            /* mpeg1 header repeated every gop */
-            put_header(s, SEQ_START_CODE);
-
-            put_bits(&s->pb, 12, s->width);
-            put_bits(&s->pb, 12, s->height);
-
-            for(i=1; i<15; i++){
-                float error= aspect_ratio;
-                if(s->codec_id == CODEC_ID_MPEG1VIDEO || i <=1)
-                    error-= 1.0/mpeg1_aspect[i];
-                else
-                    error-= av_q2d(mpeg2_aspect[i])*s->height/s->width;
-
-                error= FFABS(error);
-
-                if(error < best_aspect_error){
-                    best_aspect_error= error;
-                    s->aspect_ratio_info= i;
-                }
-            }
-
-            put_bits(&s->pb, 4, s->aspect_ratio_info);
-            put_bits(&s->pb, 4, s->frame_rate_index);
-
-            if(s->avctx->rc_max_rate){
-                v = (s->avctx->rc_max_rate + 399) / 400;
-                if (v > 0x3ffff && s->codec_id == CODEC_ID_MPEG1VIDEO)
-                    v = 0x3ffff;
-            }else{
-                v= 0x3FFFF;
-            }
-
-            if(s->avctx->rc_buffer_size)
-                vbv_buffer_size = s->avctx->rc_buffer_size;
-            else
-                /* VBV calculation: Scaled so that a VCD has the proper VBV size of 40 kilobytes */
-                vbv_buffer_size = (( 20 * s->bit_rate) / (1151929 / 2)) * 8 * 1024;
-            vbv_buffer_size= (vbv_buffer_size + 16383) / 16384;
-
-            put_bits(&s->pb, 18, v & 0x3FFFF);
-            put_bits(&s->pb, 1, 1); /* marker */
-            put_bits(&s->pb, 10, vbv_buffer_size & 0x3FF);
-
-            constraint_parameter_flag=
-                s->width <= 768 && s->height <= 576 &&
-                s->mb_width * s->mb_height <= 396 &&
-                s->mb_width * s->mb_height * framerate.num <= framerate.den*396*25 &&
-                framerate.num <= framerate.den*30 &&
-                s->avctx->me_range && s->avctx->me_range < 128 &&
-                vbv_buffer_size <= 20 &&
-                v <= 1856000/400 &&
-                s->codec_id == CODEC_ID_MPEG1VIDEO;
-
-            put_bits(&s->pb, 1, constraint_parameter_flag);
-
-            ff_write_quant_matrix(&s->pb, s->avctx->intra_matrix);
-            ff_write_quant_matrix(&s->pb, s->avctx->inter_matrix);
-
-            if(s->codec_id == CODEC_ID_MPEG2VIDEO){
-                put_header(s, EXT_START_CODE);
-                put_bits(&s->pb, 4, 1); //seq ext
-
-                put_bits(&s->pb, 1, s->avctx->profile == 0); //escx 1 for 4:2:2 profile */
-
-                put_bits(&s->pb, 3, s->avctx->profile); //profile
-                put_bits(&s->pb, 4, s->avctx->level); //level
-
-                put_bits(&s->pb, 1, s->progressive_sequence);
-                put_bits(&s->pb, 2, s->chroma_format);
-                put_bits(&s->pb, 2, 0); //horizontal size ext
-                put_bits(&s->pb, 2, 0); //vertical size ext
-                put_bits(&s->pb, 12, v>>18); //bitrate ext
-                put_bits(&s->pb, 1, 1); //marker
-                put_bits(&s->pb, 8, vbv_buffer_size >>10); //vbv buffer ext
-                put_bits(&s->pb, 1, s->low_delay);
-                put_bits(&s->pb, 2, 0); // frame_rate_ext_n
-                put_bits(&s->pb, 5, 0); // frame_rate_ext_d
-            }
-
-            put_header(s, GOP_START_CODE);
-            put_bits(&s->pb, 1, !!(s->avctx->flags2 & CODEC_FLAG2_DROP_FRAME_TIMECODE)); /* drop frame flag */
-            /* time code : we must convert from the real frame rate to a
-               fake mpeg frame rate in case of low frame rate */
-            fps = (framerate.num + framerate.den/2)/ framerate.den;
-            time_code = s->current_picture_ptr->coded_picture_number + s->avctx->timecode_frame_start;
-
-            s->gop_picture_number = s->current_picture_ptr->coded_picture_number;
-            if (s->avctx->flags2 & CODEC_FLAG2_DROP_FRAME_TIMECODE) {
-                /* only works for NTSC 29.97 */
-                int d = time_code / 17982;
-                int m = time_code % 17982;
-                //if (m < 2) m += 2; /* not needed since -2,-1 / 1798 in C returns 0 */
-                time_code += 18 * d + 2 * ((m - 2) / 1798);
-            }
-            put_bits(&s->pb, 5, (uint32_t)((time_code / (fps * 3600)) % 24));
-            put_bits(&s->pb, 6, (uint32_t)((time_code / (fps * 60)) % 60));
-            put_bits(&s->pb, 1, 1);
-            put_bits(&s->pb, 6, (uint32_t)((time_code / fps) % 60));
-            put_bits(&s->pb, 6, (uint32_t)((time_code % fps)));
-            put_bits(&s->pb, 1, !!(s->flags & CODEC_FLAG_CLOSED_GOP));
-            put_bits(&s->pb, 1, 0); /* broken link */
-        }
-}
-
-static inline void encode_mb_skip_run(MpegEncContext *s, int run){
-    while (run >= 33) {
-        put_bits(&s->pb, 11, 0x008);
-        run -= 33;
-    }
-    put_bits(&s->pb, mbAddrIncrTable[run][1],
-             mbAddrIncrTable[run][0]);
-}
-#endif //CONFIG_ENCODERS
-
-static void common_init(MpegEncContext *s)
+void common_init(MpegEncContext *s)
 {
 
     s->y_dc_scale_table=
@@ -408,621 +137,6 @@ void ff_mpeg1_clean_buffers(MpegEncContext *s){
     memset(s->last_mv, 0, sizeof(s->last_mv));
 }
 
-#ifdef CONFIG_ENCODERS
-
-static av_always_inline void put_qscale(MpegEncContext *s)
-{
-    if(s->q_scale_type){
-        assert(s->qscale>=1 && s->qscale <=12);
-        put_bits(&s->pb, 5, inv_non_linear_qscale[s->qscale]);
-    }else{
-        put_bits(&s->pb, 5, s->qscale);
-    }
-}
-
-void ff_mpeg1_encode_slice_header(MpegEncContext *s){
-    put_header(s, SLICE_MIN_START_CODE + s->mb_y);
-    put_qscale(s);
-    put_bits(&s->pb, 1, 0); /* slice extra information */
-}
-
-void mpeg1_encode_picture_header(MpegEncContext *s, int picture_number)
-{
-    mpeg1_encode_sequence_header(s);
-
-    /* mpeg1 picture header */
-    put_header(s, PICTURE_START_CODE);
-    /* temporal reference */
-
-    // RAL: s->picture_number instead of s->fake_picture_number
-    put_bits(&s->pb, 10, (s->picture_number -
-                          s->gop_picture_number) & 0x3ff);
-    put_bits(&s->pb, 3, s->pict_type);
-
-    s->vbv_delay_ptr= s->pb.buf + put_bits_count(&s->pb)/8;
-    put_bits(&s->pb, 16, 0xFFFF); /* vbv_delay */
-
-    // RAL: Forward f_code also needed for B frames
-    if (s->pict_type == P_TYPE || s->pict_type == B_TYPE) {
-        put_bits(&s->pb, 1, 0); /* half pel coordinates */
-        if(s->codec_id == CODEC_ID_MPEG1VIDEO)
-            put_bits(&s->pb, 3, s->f_code); /* forward_f_code */
-        else
-            put_bits(&s->pb, 3, 7); /* forward_f_code */
-    }
-
-    // RAL: Backward f_code necessary for B frames
-    if (s->pict_type == B_TYPE) {
-        put_bits(&s->pb, 1, 0); /* half pel coordinates */
-        if(s->codec_id == CODEC_ID_MPEG1VIDEO)
-            put_bits(&s->pb, 3, s->b_code); /* backward_f_code */
-        else
-            put_bits(&s->pb, 3, 7); /* backward_f_code */
-    }
-
-    put_bits(&s->pb, 1, 0); /* extra bit picture */
-
-    s->frame_pred_frame_dct = 1;
-    if(s->codec_id == CODEC_ID_MPEG2VIDEO){
-        put_header(s, EXT_START_CODE);
-        put_bits(&s->pb, 4, 8); //pic ext
-        if (s->pict_type == P_TYPE || s->pict_type == B_TYPE) {
-            put_bits(&s->pb, 4, s->f_code);
-            put_bits(&s->pb, 4, s->f_code);
-        }else{
-            put_bits(&s->pb, 8, 255);
-        }
-        if (s->pict_type == B_TYPE) {
-            put_bits(&s->pb, 4, s->b_code);
-            put_bits(&s->pb, 4, s->b_code);
-        }else{
-            put_bits(&s->pb, 8, 255);
-        }
-        put_bits(&s->pb, 2, s->intra_dc_precision);
-
-        assert(s->picture_structure == PICT_FRAME);
-        put_bits(&s->pb, 2, s->picture_structure);
-        if (s->progressive_sequence) {
-            put_bits(&s->pb, 1, 0); /* no repeat */
-        } else {
-            put_bits(&s->pb, 1, s->current_picture_ptr->top_field_first);
-        }
-        /* XXX: optimize the generation of this flag with entropy
-           measures */
-        s->frame_pred_frame_dct = s->progressive_sequence;
-
-        put_bits(&s->pb, 1, s->frame_pred_frame_dct);
-        put_bits(&s->pb, 1, s->concealment_motion_vectors);
-        put_bits(&s->pb, 1, s->q_scale_type);
-        put_bits(&s->pb, 1, s->intra_vlc_format);
-        put_bits(&s->pb, 1, s->alternate_scan);
-        put_bits(&s->pb, 1, s->repeat_first_field);
-        s->progressive_frame = s->progressive_sequence;
-        put_bits(&s->pb, 1, s->chroma_format == CHROMA_420 ? s->progressive_frame : 0); /* chroma_420_type */
-        put_bits(&s->pb, 1, s->progressive_frame);
-        put_bits(&s->pb, 1, 0); //composite_display_flag
-    }
-    if(s->flags & CODEC_FLAG_SVCD_SCAN_OFFSET){
-        int i;
-
-        put_header(s, USER_START_CODE);
-        for(i=0; i<sizeof(svcd_scan_offset_placeholder); i++){
-            put_bits(&s->pb, 8, svcd_scan_offset_placeholder[i]);
-        }
-    }
-
-    s->mb_y=0;
-    ff_mpeg1_encode_slice_header(s);
-}
-
-static inline void put_mb_modes(MpegEncContext *s, int n, int bits,
-                                int has_mv, int field_motion)
-{
-    put_bits(&s->pb, n, bits);
-    if (!s->frame_pred_frame_dct) {
-        if (has_mv)
-            put_bits(&s->pb, 2, 2 - field_motion); /* motion_type: frame/field */
-        put_bits(&s->pb, 1, s->interlaced_dct);
-    }
-}
-
-static av_always_inline void mpeg1_encode_mb_internal(MpegEncContext *s,
-                                                   DCTELEM block[6][64],
-                                                   int motion_x, int motion_y,
-                                                   int mb_block_count)
-{
-    int i, cbp;
-    const int mb_x = s->mb_x;
-    const int mb_y = s->mb_y;
-    const int first_mb= mb_x == s->resync_mb_x && mb_y == s->resync_mb_y;
-
-    /* compute cbp */
-    cbp = 0;
-    for(i=0;i<mb_block_count;i++) {
-        if (s->block_last_index[i] >= 0)
-            cbp |= 1 << (mb_block_count - 1 - i);
-    }
-
-    if (cbp == 0 && !first_mb && s->mv_type == MV_TYPE_16X16 &&
-        (mb_x != s->mb_width - 1 || (mb_y != s->mb_height - 1 && s->codec_id == CODEC_ID_MPEG1VIDEO)) &&
-        ((s->pict_type == P_TYPE && (motion_x | motion_y) == 0) ||
-        (s->pict_type == B_TYPE && s->mv_dir == s->last_mv_dir && (((s->mv_dir & MV_DIR_FORWARD) ? ((s->mv[0][0][0] - s->last_mv[0][0][0])|(s->mv[0][0][1] - s->last_mv[0][0][1])) : 0) |
-        ((s->mv_dir & MV_DIR_BACKWARD) ? ((s->mv[1][0][0] - s->last_mv[1][0][0])|(s->mv[1][0][1] - s->last_mv[1][0][1])) : 0)) == 0))) {
-        s->mb_skip_run++;
-        s->qscale -= s->dquant;
-        s->skip_count++;
-        s->misc_bits++;
-        s->last_bits++;
-        if(s->pict_type == P_TYPE){
-            s->last_mv[0][1][0]= s->last_mv[0][0][0]=
-            s->last_mv[0][1][1]= s->last_mv[0][0][1]= 0;
-        }
-    } else {
-        if(first_mb){
-            assert(s->mb_skip_run == 0);
-            encode_mb_skip_run(s, s->mb_x);
-        }else{
-            encode_mb_skip_run(s, s->mb_skip_run);
-        }
-
-        if (s->pict_type == I_TYPE) {
-            if(s->dquant && cbp){
-                put_mb_modes(s, 2, 1, 0, 0); /* macroblock_type : macroblock_quant = 1 */
-                put_qscale(s);
-            }else{
-                put_mb_modes(s, 1, 1, 0, 0); /* macroblock_type : macroblock_quant = 0 */
-                s->qscale -= s->dquant;
-            }
-            s->misc_bits+= get_bits_diff(s);
-            s->i_count++;
-        } else if (s->mb_intra) {
-            if(s->dquant && cbp){
-                put_mb_modes(s, 6, 0x01, 0, 0);
-                put_qscale(s);
-            }else{
-                put_mb_modes(s, 5, 0x03, 0, 0);
-                s->qscale -= s->dquant;
-            }
-            s->misc_bits+= get_bits_diff(s);
-            s->i_count++;
-            memset(s->last_mv, 0, sizeof(s->last_mv));
-        } else if (s->pict_type == P_TYPE) {
-            if(s->mv_type == MV_TYPE_16X16){
-                if (cbp != 0) {
-                    if ((motion_x|motion_y) == 0) {
-                        if(s->dquant){
-                            put_mb_modes(s, 5, 1, 0, 0); /* macroblock_pattern & quant */
-                            put_qscale(s);
-                        }else{
-                            put_mb_modes(s, 2, 1, 0, 0); /* macroblock_pattern only */
-                        }
-                        s->misc_bits+= get_bits_diff(s);
-                    } else {
-                        if(s->dquant){
-                            put_mb_modes(s, 5, 2, 1, 0); /* motion + cbp */
-                            put_qscale(s);
-                        }else{
-                            put_mb_modes(s, 1, 1, 1, 0); /* motion + cbp */
-                        }
-                        s->misc_bits+= get_bits_diff(s);
-                        mpeg1_encode_motion(s, motion_x - s->last_mv[0][0][0], s->f_code);    // RAL: f_code parameter added
-                        mpeg1_encode_motion(s, motion_y - s->last_mv[0][0][1], s->f_code);    // RAL: f_code parameter added
-                        s->mv_bits+= get_bits_diff(s);
-                    }
-                } else {
-                    put_bits(&s->pb, 3, 1); /* motion only */
-                    if (!s->frame_pred_frame_dct)
-                        put_bits(&s->pb, 2, 2); /* motion_type: frame */
-                    s->misc_bits+= get_bits_diff(s);
-                    mpeg1_encode_motion(s, motion_x - s->last_mv[0][0][0], s->f_code);    // RAL: f_code parameter added
-                    mpeg1_encode_motion(s, motion_y - s->last_mv[0][0][1], s->f_code);    // RAL: f_code parameter added
-                    s->qscale -= s->dquant;
-                    s->mv_bits+= get_bits_diff(s);
-                }
-                s->last_mv[0][1][0]= s->last_mv[0][0][0]= motion_x;
-                s->last_mv[0][1][1]= s->last_mv[0][0][1]= motion_y;
-            }else{
-                assert(!s->frame_pred_frame_dct && s->mv_type == MV_TYPE_FIELD);
-
-                if (cbp) {
-                    if(s->dquant){
-                        put_mb_modes(s, 5, 2, 1, 1); /* motion + cbp */
-                        put_qscale(s);
-                    }else{
-                        put_mb_modes(s, 1, 1, 1, 1); /* motion + cbp */
-                    }
-                } else {
-                    put_bits(&s->pb, 3, 1); /* motion only */
-                    put_bits(&s->pb, 2, 1); /* motion_type: field */
-                    s->qscale -= s->dquant;
-                }
-                s->misc_bits+= get_bits_diff(s);
-                for(i=0; i<2; i++){
-                    put_bits(&s->pb, 1, s->field_select[0][i]);
-                    mpeg1_encode_motion(s, s->mv[0][i][0] -  s->last_mv[0][i][0]    , s->f_code);
-                    mpeg1_encode_motion(s, s->mv[0][i][1] - (s->last_mv[0][i][1]>>1), s->f_code);
-                    s->last_mv[0][i][0]=   s->mv[0][i][0];
-                    s->last_mv[0][i][1]= 2*s->mv[0][i][1];
-                }
-                s->mv_bits+= get_bits_diff(s);
-            }
-            if(cbp) {
-                if (s->chroma_y_shift) {
-                    put_bits(&s->pb, mbPatTable[cbp][1], mbPatTable[cbp][0]);
-                } else {
-                    put_bits(&s->pb, mbPatTable[cbp>>2][1], mbPatTable[cbp>>2][0]);
-                    put_bits(&s->pb, 2, cbp & 3);
-                }
-            }
-            s->f_count++;
-        } else{
-            static const int mb_type_len[4]={0,3,4,2}; //bak,for,bi
-
-            if(s->mv_type == MV_TYPE_16X16){
-                if (cbp){    // With coded bloc pattern
-                    if (s->dquant) {
-                        if(s->mv_dir == MV_DIR_FORWARD)
-                            put_mb_modes(s, 6, 3, 1, 0);
-                        else
-                            put_mb_modes(s, mb_type_len[s->mv_dir]+3, 2, 1, 0);
-                        put_qscale(s);
-                    } else {
-                        put_mb_modes(s, mb_type_len[s->mv_dir], 3, 1, 0);
-                    }
-                }else{    // No coded bloc pattern
-                    put_bits(&s->pb, mb_type_len[s->mv_dir], 2);
-                    if (!s->frame_pred_frame_dct)
-                        put_bits(&s->pb, 2, 2); /* motion_type: frame */
-                    s->qscale -= s->dquant;
-                }
-                s->misc_bits += get_bits_diff(s);
-                if (s->mv_dir&MV_DIR_FORWARD){
-                    mpeg1_encode_motion(s, s->mv[0][0][0] - s->last_mv[0][0][0], s->f_code);
-                    mpeg1_encode_motion(s, s->mv[0][0][1] - s->last_mv[0][0][1], s->f_code);
-                    s->last_mv[0][0][0]=s->last_mv[0][1][0]= s->mv[0][0][0];
-                    s->last_mv[0][0][1]=s->last_mv[0][1][1]= s->mv[0][0][1];
-                    s->f_count++;
-                }
-                if (s->mv_dir&MV_DIR_BACKWARD){
-                    mpeg1_encode_motion(s, s->mv[1][0][0] - s->last_mv[1][0][0], s->b_code);
-                    mpeg1_encode_motion(s, s->mv[1][0][1] - s->last_mv[1][0][1], s->b_code);
-                    s->last_mv[1][0][0]=s->last_mv[1][1][0]= s->mv[1][0][0];
-                    s->last_mv[1][0][1]=s->last_mv[1][1][1]= s->mv[1][0][1];
-                    s->b_count++;
-                }
-            }else{
-                assert(s->mv_type == MV_TYPE_FIELD);
-                assert(!s->frame_pred_frame_dct);
-                if (cbp){    // With coded bloc pattern
-                    if (s->dquant) {
-                        if(s->mv_dir == MV_DIR_FORWARD)
-                            put_mb_modes(s, 6, 3, 1, 1);
-                        else
-                            put_mb_modes(s, mb_type_len[s->mv_dir]+3, 2, 1, 1);
-                        put_qscale(s);
-                    } else {
-                        put_mb_modes(s, mb_type_len[s->mv_dir], 3, 1, 1);
-                    }
-                }else{    // No coded bloc pattern
-                    put_bits(&s->pb, mb_type_len[s->mv_dir], 2);
-                    put_bits(&s->pb, 2, 1); /* motion_type: field */
-                    s->qscale -= s->dquant;
-                }
-                s->misc_bits += get_bits_diff(s);
-                if (s->mv_dir&MV_DIR_FORWARD){
-                    for(i=0; i<2; i++){
-                        put_bits(&s->pb, 1, s->field_select[0][i]);
-                        mpeg1_encode_motion(s, s->mv[0][i][0] -  s->last_mv[0][i][0]    , s->f_code);
-                        mpeg1_encode_motion(s, s->mv[0][i][1] - (s->last_mv[0][i][1]>>1), s->f_code);
-                        s->last_mv[0][i][0]=   s->mv[0][i][0];
-                        s->last_mv[0][i][1]= 2*s->mv[0][i][1];
-                    }
-                    s->f_count++;
-                }
-                if (s->mv_dir&MV_DIR_BACKWARD){
-                    for(i=0; i<2; i++){
-                        put_bits(&s->pb, 1, s->field_select[1][i]);
-                        mpeg1_encode_motion(s, s->mv[1][i][0] -  s->last_mv[1][i][0]    , s->b_code);
-                        mpeg1_encode_motion(s, s->mv[1][i][1] - (s->last_mv[1][i][1]>>1), s->b_code);
-                        s->last_mv[1][i][0]=   s->mv[1][i][0];
-                        s->last_mv[1][i][1]= 2*s->mv[1][i][1];
-                    }
-                    s->b_count++;
-                }
-            }
-            s->mv_bits += get_bits_diff(s);
-            if(cbp) {
-                if (s->chroma_y_shift) {
-                    put_bits(&s->pb, mbPatTable[cbp][1], mbPatTable[cbp][0]);
-                } else {
-                    put_bits(&s->pb, mbPatTable[cbp>>2][1], mbPatTable[cbp>>2][0]);
-                    put_bits(&s->pb, 2, cbp & 3);
-                }
-            }
-        }
-        for(i=0;i<mb_block_count;i++) {
-            if (cbp & (1 << (mb_block_count - 1 - i))) {
-                mpeg1_encode_block(s, block[i], i);
-            }
-        }
-        s->mb_skip_run = 0;
-        if(s->mb_intra)
-            s->i_tex_bits+= get_bits_diff(s);
-        else
-            s->p_tex_bits+= get_bits_diff(s);
-    }
-}
-
-void mpeg1_encode_mb(MpegEncContext *s, DCTELEM block[6][64], int motion_x, int motion_y)
-{
-    if (s->chroma_format == CHROMA_420) mpeg1_encode_mb_internal(s, block, motion_x, motion_y, 6);
-    else                                mpeg1_encode_mb_internal(s, block, motion_x, motion_y, 8);
-}
-
-// RAL: Parameter added: f_or_b_code
-static void mpeg1_encode_motion(MpegEncContext *s, int val, int f_or_b_code)
-{
-    int code, bit_size, l, bits, range, sign;
-
-    if (val == 0) {
-        /* zero vector */
-        code = 0;
-        put_bits(&s->pb,
-                 mbMotionVectorTable[0][1],
-                 mbMotionVectorTable[0][0]);
-    } else {
-        bit_size = f_or_b_code - 1;
-        range = 1 << bit_size;
-        /* modulo encoding */
-        l= INT_BIT - 5 - bit_size;
-        val= (val<<l)>>l;
-
-        if (val >= 0) {
-            val--;
-            code = (val >> bit_size) + 1;
-            bits = val & (range - 1);
-            sign = 0;
-        } else {
-            val = -val;
-            val--;
-            code = (val >> bit_size) + 1;
-            bits = val & (range - 1);
-            sign = 1;
-        }
-
-        assert(code > 0 && code <= 16);
-
-        put_bits(&s->pb,
-                 mbMotionVectorTable[code][1],
-                 mbMotionVectorTable[code][0]);
-
-        put_bits(&s->pb, 1, sign);
-        if (bit_size > 0) {
-            put_bits(&s->pb, bit_size, bits);
-        }
-    }
-}
-
-void ff_mpeg1_encode_init(MpegEncContext *s)
-{
-    static int done=0;
-
-    common_init(s);
-
-    if(!done){
-        int f_code;
-        int mv;
-        int i;
-
-        done=1;
-        init_rl(&rl_mpeg1, static_rl_table_store[0]);
-        init_rl(&rl_mpeg2, static_rl_table_store[1]);
-
-        for(i=0; i<64; i++)
-        {
-                mpeg1_max_level[0][i]= rl_mpeg1.max_level[0][i];
-                mpeg1_index_run[0][i]= rl_mpeg1.index_run[0][i];
-        }
-
-        init_uni_ac_vlc(&rl_mpeg1, uni_mpeg1_ac_vlc_len);
-        if(s->intra_vlc_format)
-            init_uni_ac_vlc(&rl_mpeg2, uni_mpeg2_ac_vlc_len);
-
-        /* build unified dc encoding tables */
-        for(i=-255; i<256; i++)
-        {
-                int adiff, index;
-                int bits, code;
-                int diff=i;
-
-                adiff = FFABS(diff);
-                if(diff<0) diff--;
-                index = av_log2(2*adiff);
-
-                bits= vlc_dc_lum_bits[index] + index;
-                code= (vlc_dc_lum_code[index]<<index) + (diff & ((1 << index) - 1));
-                mpeg1_lum_dc_uni[i+255]= bits + (code<<8);
-
-                bits= vlc_dc_chroma_bits[index] + index;
-                code= (vlc_dc_chroma_code[index]<<index) + (diff & ((1 << index) - 1));
-                mpeg1_chr_dc_uni[i+255]= bits + (code<<8);
-        }
-
-        for(f_code=1; f_code<=MAX_FCODE; f_code++){
-            for(mv=-MAX_MV; mv<=MAX_MV; mv++){
-                int len;
-
-                if(mv==0) len= mbMotionVectorTable[0][1];
-                else{
-                    int val, bit_size, range, code;
-
-                    bit_size = f_code - 1;
-                    range = 1 << bit_size;
-
-                    val=mv;
-                    if (val < 0)
-                        val = -val;
-                    val--;
-                    code = (val >> bit_size) + 1;
-                    if(code<17){
-                        len= mbMotionVectorTable[code][1] + 1 + bit_size;
-                    }else{
-                        len= mbMotionVectorTable[16][1] + 2 + bit_size;
-                    }
-                }
-
-                mv_penalty[f_code][mv+MAX_MV]= len;
-            }
-        }
-
-
-        for(f_code=MAX_FCODE; f_code>0; f_code--){
-            for(mv=-(8<<f_code); mv<(8<<f_code); mv++){
-                fcode_tab[mv+MAX_MV]= f_code;
-            }
-        }
-    }
-    s->me.mv_penalty= mv_penalty;
-    s->fcode_tab= fcode_tab;
-    if(s->codec_id == CODEC_ID_MPEG1VIDEO){
-        s->min_qcoeff=-255;
-        s->max_qcoeff= 255;
-    }else{
-        s->min_qcoeff=-2047;
-        s->max_qcoeff= 2047;
-    }
-    if (s->intra_vlc_format) {
-        s->intra_ac_vlc_length=
-        s->intra_ac_vlc_last_length= uni_mpeg2_ac_vlc_len;
-    } else {
-        s->intra_ac_vlc_length=
-        s->intra_ac_vlc_last_length= uni_mpeg1_ac_vlc_len;
-    }
-    s->inter_ac_vlc_length=
-    s->inter_ac_vlc_last_length= uni_mpeg1_ac_vlc_len;
-}
-
-static inline void encode_dc(MpegEncContext *s, int diff, int component)
-{
-  if(((unsigned) (diff+255)) >= 511){
-        int index;
-
-        if(diff<0){
-            index= av_log2_16bit(-2*diff);
-            diff--;
-        }else{
-            index= av_log2_16bit(2*diff);
-        }
-        if (component == 0) {
-            put_bits(
-                &s->pb,
-                vlc_dc_lum_bits[index] + index,
-                (vlc_dc_lum_code[index]<<index) + (diff & ((1 << index) - 1)));
-        }else{
-            put_bits(
-                &s->pb,
-                vlc_dc_chroma_bits[index] + index,
-                (vlc_dc_chroma_code[index]<<index) + (diff & ((1 << index) - 1)));
-        }
-  }else{
-    if (component == 0) {
-        put_bits(
-            &s->pb,
-            mpeg1_lum_dc_uni[diff+255]&0xFF,
-            mpeg1_lum_dc_uni[diff+255]>>8);
-    } else {
-        put_bits(
-            &s->pb,
-            mpeg1_chr_dc_uni[diff+255]&0xFF,
-            mpeg1_chr_dc_uni[diff+255]>>8);
-    }
-  }
-}
-
-static void mpeg1_encode_block(MpegEncContext *s,
-                               DCTELEM *block,
-                               int n)
-{
-    int alevel, level, last_non_zero, dc, diff, i, j, run, last_index, sign;
-    int code, component;
-    const uint16_t (*table_vlc)[2] = rl_mpeg1.table_vlc;
-
-    last_index = s->block_last_index[n];
-
-    /* DC coef */
-    if (s->mb_intra) {
-        component = (n <= 3 ? 0 : (n&1) + 1);
-        dc = block[0]; /* overflow is impossible */
-        diff = dc - s->last_dc[component];
-        encode_dc(s, diff, component);
-        s->last_dc[component] = dc;
-        i = 1;
-        if (s->intra_vlc_format)
-            table_vlc = rl_mpeg2.table_vlc;
-    } else {
-        /* encode the first coefficient : needs to be done here because
-           it is handled slightly differently */
-        level = block[0];
-        if (abs(level) == 1) {
-                code = ((uint32_t)level >> 31); /* the sign bit */
-                put_bits(&s->pb, 2, code | 0x02);
-                i = 1;
-        } else {
-            i = 0;
-            last_non_zero = -1;
-            goto next_coef;
-        }
-    }
-
-    /* now quantify & encode AC coefs */
-    last_non_zero = i - 1;
-
-    for(;i<=last_index;i++) {
-        j = s->intra_scantable.permutated[i];
-        level = block[j];
-    next_coef:
-#if 0
-        if (level != 0)
-            dprintf(s->avctx, "level[%d]=%d\n", i, level);
-#endif
-        /* encode using VLC */
-        if (level != 0) {
-            run = i - last_non_zero - 1;
-
-            alevel= level;
-            MASK_ABS(sign, alevel)
-            sign&=1;
-
-            if (alevel <= mpeg1_max_level[0][run]){
-                code= mpeg1_index_run[0][run] + alevel - 1;
-                /* store the vlc & sign at once */
-                put_bits(&s->pb, table_vlc[code][1]+1, (table_vlc[code][0]<<1) + sign);
-            } else {
-                /* escape seems to be pretty rare <5% so I do not optimize it */
-                put_bits(&s->pb, table_vlc[111][1], table_vlc[111][0]);
-                /* escape: only clip in this case */
-                put_bits(&s->pb, 6, run);
-                if(s->codec_id == CODEC_ID_MPEG1VIDEO){
-                    if (alevel < 128) {
-                        put_bits(&s->pb, 8, level & 0xff);
-                    } else {
-                        if (level < 0) {
-                            put_bits(&s->pb, 16, 0x8001 + level + 255);
-                        } else {
-                            put_bits(&s->pb, 16, level & 0xffff);
-                        }
-                    }
-                }else{
-                    put_bits(&s->pb, 12, level & 0xfff);
-                }
-            }
-            last_non_zero = i;
-        }
-    }
-    /* end of block */
-    put_bits(&s->pb, table_vlc[112][1], table_vlc[112][0]);
-}
-#endif //CONFIG_ENCODERS
 
 /******************************************/
 /* decoding */
@@ -3288,35 +2402,6 @@ AVCodec mpegvideo_decoder = {
     .flush= ff_mpeg_flush,
 };
 
-#ifdef CONFIG_ENCODERS
-
-AVCodec mpeg1video_encoder = {
-    "mpeg1video",
-    CODEC_TYPE_VIDEO,
-    CODEC_ID_MPEG1VIDEO,
-    sizeof(MpegEncContext),
-    encode_init,
-    MPV_encode_picture,
-    MPV_encode_end,
-    .supported_framerates= ff_frame_rate_tab+1,
-    .pix_fmts= (enum PixelFormat[]){PIX_FMT_YUV420P, -1},
-    .capabilities= CODEC_CAP_DELAY,
-};
-
-AVCodec mpeg2video_encoder = {
-    "mpeg2video",
-    CODEC_TYPE_VIDEO,
-    CODEC_ID_MPEG2VIDEO,
-    sizeof(MpegEncContext),
-    encode_init,
-    MPV_encode_picture,
-    MPV_encode_end,
-    .supported_framerates= ff_frame_rate_tab+1,
-    .pix_fmts= (enum PixelFormat[]){PIX_FMT_YUV420P, PIX_FMT_YUV422P, -1},
-    .capabilities= CODEC_CAP_DELAY,
-};
-#endif
-
 #ifdef HAVE_XVMC
 static int mpeg_mc_decode_init(AVCodecContext *avctx){
     Mpeg1Context *s;