X-Git-Url: https://git.sesse.net/?a=blobdiff_plain;f=libavcodec%2Frv10.c;h=d85cf37cac3319566f42823549c7ffc0b46980ea;hb=75abcdb3915e3abb2dc6b5f7d101c177dcfdb626;hp=5dd942dc557145d53bf724cd1bcd21d6f8f18008;hpb=5509bffa88238d1f445a84a32e3791bfb9e532fd;p=ffmpeg

diff --git a/libavcodec/rv10.c b/libavcodec/rv10.c
index 5dd942dc557..d85cf37cac3 100644
--- a/libavcodec/rv10.c
+++ b/libavcodec/rv10.c
@@ -1,31 +1,36 @@
 /*
- * RV10 codec
- * Copyright (c) 2000,2001 Fabrice Bellard.
+ * RV10/RV20 decoder
+ * Copyright (c) 2000,2001 Fabrice Bellard
  * Copyright (c) 2002-2004 Michael Niedermayer
  *
- * This library is free software; you can redistribute it and/or
+ * This file is part of Libav.
+ *
+ * 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 of the License, or (at your option) any later version.
+ * version 2.1 of the License, or (at your option) any later version.
  *
- * This library 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 this library; 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 rv10.c
- * RV10 codec.
+ * @file
+ * RV10/RV20 decoder
  */
 
+#include "libavutil/imgutils.h"
 #include "avcodec.h"
 #include "dsputil.h"
 #include "mpegvideo.h"
+#include "mpeg4video.h"
+#include "h263.h"
 
 //#define DEBUG
 
@@ -193,12 +198,12 @@ int rv_decode_dc(MpegEncContext *s, int n)
             } else if (code == 0x7d) {
                 code = -128 + get_bits(&s->gb, 7);
             } else if (code == 0x7e) {
-                if (get_bits(&s->gb, 1) == 0)
+                if (get_bits1(&s->gb) == 0)
                     code = (int8_t)(get_bits(&s->gb, 8) + 1);
                 else
                     code = (int8_t)(get_bits(&s->gb, 8));
             } else if (code == 0x7f) {
-                get_bits(&s->gb, 11);
+                skip_bits(&s->gb, 11);
                 code = 1;
             }
         } else {
@@ -214,7 +219,7 @@ int rv_decode_dc(MpegEncContext *s, int n)
             } else if (code == 0x1fd) {
                 code = -128 + get_bits(&s->gb, 7);
             } else if (code == 0x1fe) {
-                get_bits(&s->gb, 9);
+                skip_bits(&s->gb, 9);
                 code = 1;
             } else {
                 av_log(s->avctx, AV_LOG_ERROR, "chroma dc error\n");
@@ -227,102 +232,21 @@ int rv_decode_dc(MpegEncContext *s, int n)
     return -code;
 }
 
-#ifdef CONFIG_ENCODERS
-
-/* write RV 1.0 compatible frame header */
-void rv10_encode_picture_header(MpegEncContext *s, int picture_number)
-{
-    int full_frame= 0;
-
-    align_put_bits(&s->pb);
-
-    put_bits(&s->pb, 1, 1);     /* marker */
-
-    put_bits(&s->pb, 1, (s->pict_type == P_TYPE));
-
-    put_bits(&s->pb, 1, 0);     /* not PB frame */
-
-    put_bits(&s->pb, 5, s->qscale);
-
-    if (s->pict_type == I_TYPE) {
-        /* specific MPEG like DC coding not used */
-    }
-    /* if multiple packets per frame are sent, the position at which
-       to display the macro blocks is coded here */
-    if(!full_frame){
-        put_bits(&s->pb, 6, 0); /* mb_x */
-        put_bits(&s->pb, 6, 0); /* mb_y */
-        put_bits(&s->pb, 12, s->mb_width * s->mb_height);
-    }
-
-    put_bits(&s->pb, 3, 0);     /* ignored */
-}
-
-void rv20_encode_picture_header(MpegEncContext *s, int picture_number){
-    put_bits(&s->pb, 2, s->pict_type); //I 0 vs. 1 ?
-    put_bits(&s->pb, 1, 0);     /* unknown bit */
-    put_bits(&s->pb, 5, s->qscale);
-
-    put_bits(&s->pb, 8, picture_number&0xFF); //FIXME wrong, but correct is not known
-    s->mb_x= s->mb_y= 0;
-    ff_h263_encode_mba(s);
-
-    put_bits(&s->pb, 1, s->no_rounding);
-
-    assert(s->f_code == 1);
-    assert(s->unrestricted_mv == 1);
-//    assert(s->h263_aic== (s->pict_type == I_TYPE));
-    assert(s->alt_inter_vlc == 0);
-    assert(s->umvplus == 0);
-    assert(s->modified_quant==1);
-    assert(s->loop_filter==1);
-
-    s->h263_aic= s->pict_type == I_TYPE;
-    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 0 /* unused, remove? */
-static int get_num(GetBitContext *gb)
-{
-    int n, n1;
-
-    n = get_bits(gb, 16);
-    if (n >= 0x4000) {
-        return n - 0x4000;
-    } else {
-        n1 = get_bits(gb, 16);
-        return (n << 16) | n1;
-    }
-}
-#endif
-
-#endif //CONFIG_ENCODERS
-
 /* read RV 1.0 compatible frame header */
 static int rv10_decode_picture_header(MpegEncContext *s)
 {
     int mb_count, pb_frame, marker, unk, mb_xy;
 
-//printf("ff:%d\n", full_frame);
-    marker = get_bits(&s->gb, 1);
+    marker = get_bits1(&s->gb);
 
-    if (get_bits(&s->gb, 1))
-        s->pict_type = P_TYPE;
+    if (get_bits1(&s->gb))
+        s->pict_type = AV_PICTURE_TYPE_P;
     else
-        s->pict_type = I_TYPE;
-//printf("h:%X ver:%d\n",h,s->rv10_version);
+        s->pict_type = AV_PICTURE_TYPE_I;
     if(!marker) av_log(s->avctx, AV_LOG_ERROR, "marker missing\n");
-    pb_frame = get_bits(&s->gb, 1);
+    pb_frame = get_bits1(&s->gb);
 
-#ifdef DEBUG
-    printf("pict_type=%d pb_frame=%d\n", s->pict_type, pb_frame);
-#endif
+    av_dlog(s->avctx, "pict_type=%d pb_frame=%d\n", s->pict_type, pb_frame);
 
     if (pb_frame){
         av_log(s->avctx, AV_LOG_ERROR, "pb frame not supported\n");
@@ -335,22 +259,18 @@ static int rv10_decode_picture_header(MpegEncContext *s)
         return -1;
     }
 
-    if (s->pict_type == I_TYPE) {
+    if (s->pict_type == AV_PICTURE_TYPE_I) {
         if (s->rv10_version == 3) {
             /* specific MPEG like DC coding not used */
             s->last_dc[0] = get_bits(&s->gb, 8);
             s->last_dc[1] = get_bits(&s->gb, 8);
             s->last_dc[2] = get_bits(&s->gb, 8);
-#ifdef DEBUG
-            printf("DC:%d %d %d\n",
-                   s->last_dc[0],
-                   s->last_dc[1],
-                   s->last_dc[2]);
-#endif
+            av_dlog(s->avctx, "DC:%d %d %d\n", s->last_dc[0],
+                    s->last_dc[1], s->last_dc[2]);
         }
     }
     /* if multiple packets per frame are sent, the position at which
-       to display the macro blocks is coded here */
+       to display the macroblocks is coded here */
 
     mb_xy= s->mb_x + s->mb_y*s->mb_width;
     if(show_bits(&s->gb, 12)==0 || (mb_xy && mb_xy < s->mb_num)){
@@ -363,7 +283,6 @@ static int rv10_decode_picture_header(MpegEncContext *s)
         mb_count = s->mb_width * s->mb_height;
     }
     unk= get_bits(&s->gb, 3);   /* ignored */
-//printf("%d\n", unk);
     s->f_code = 1;
     s->unrestricted_mv = 1;
 
@@ -374,22 +293,6 @@ static int rv20_decode_picture_header(MpegEncContext *s)
 {
     int seq, mb_pos, i;
 
-#if 0
-    GetBitContext gb= s->gb;
-    for(i=0; i<64; i++){
-        av_log(s->avctx, AV_LOG_DEBUG, "%d", get_bits1(&gb));
-        if(i%4==3) av_log(s->avctx, AV_LOG_DEBUG, " ");
-    }
-    av_log(s->avctx, AV_LOG_DEBUG, "\n");
-#endif
-#if 0
-    for(i=0; i<s->avctx->extradata_size; i++){
-        av_log(s->avctx, AV_LOG_DEBUG, "%2X ", ((uint8_t*)s->avctx->extradata)[i]);
-        if(i%4==3) av_log(s->avctx, AV_LOG_DEBUG, " ");
-    }
-    av_log(s->avctx, AV_LOG_DEBUG, "\n");
-#endif
-
     if(s->avctx->sub_id == 0x30202002 || s->avctx->sub_id == 0x30203002){
         if (get_bits(&s->gb, 3)){
             av_log(s->avctx, AV_LOG_ERROR, "unknown triplet set\n");
@@ -399,21 +302,21 @@ static int rv20_decode_picture_header(MpegEncContext *s)
 
     i= get_bits(&s->gb, 2);
     switch(i){
-    case 0: s->pict_type= I_TYPE; break;
-    case 1: s->pict_type= I_TYPE; break; //hmm ...
-    case 2: s->pict_type= P_TYPE; break;
-    case 3: s->pict_type= B_TYPE; break;
+    case 0: s->pict_type= AV_PICTURE_TYPE_I; break;
+    case 1: s->pict_type= AV_PICTURE_TYPE_I; break; //hmm ...
+    case 2: s->pict_type= AV_PICTURE_TYPE_P; break;
+    case 3: s->pict_type= AV_PICTURE_TYPE_B; break;
     default:
         av_log(s->avctx, AV_LOG_ERROR, "unknown frame type\n");
         return -1;
     }
 
-    if(s->last_picture_ptr==NULL && s->pict_type==B_TYPE){
+    if(s->last_picture_ptr==NULL && s->pict_type==AV_PICTURE_TYPE_B){
         av_log(s->avctx, AV_LOG_ERROR, "early B pix\n");
         return -1;
     }
 
-    if (get_bits(&s->gb, 1)){
+    if (get_bits1(&s->gb)){
         av_log(s->avctx, AV_LOG_ERROR, "unknown bit set\n");
         return -1;
     }
@@ -424,24 +327,41 @@ static int rv20_decode_picture_header(MpegEncContext *s)
         return -1;
     }
     if(s->avctx->sub_id == 0x30203002){
-        if (get_bits(&s->gb, 1)){
+        if (get_bits1(&s->gb)){
             av_log(s->avctx, AV_LOG_ERROR, "unknown bit2 set\n");
             return -1;
         }
     }
 
     if(s->avctx->has_b_frames){
-        int f=9;
-        int v= s->avctx->extradata_size >= 4 ? ((uint8_t*)s->avctx->extradata)[1] : 0;
+        int f, new_w, new_h;
+        int v= s->avctx->extradata_size >= 4 ? 7&((uint8_t*)s->avctx->extradata)[1] : 0;
 
-        if (get_bits(&s->gb, 1)){
+        if (get_bits1(&s->gb)){
             av_log(s->avctx, AV_LOG_ERROR, "unknown bit3 set\n");
-//            return -1;
         }
-        seq= get_bits(&s->gb, 14)<<1;
+        seq= get_bits(&s->gb, 13)<<2;
 
-        if(v)
-            f= get_bits(&s->gb, av_log2(v));
+        f= get_bits(&s->gb, av_log2(v)+1);
+
+        if(f){
+            new_w= 4*((uint8_t*)s->avctx->extradata)[6+2*f];
+            new_h= 4*((uint8_t*)s->avctx->extradata)[7+2*f];
+        }else{
+            new_w= s->orig_width ;
+            new_h= s->orig_height;
+        }
+        if(new_w != s->width || new_h != s->height){
+            av_log(s->avctx, AV_LOG_DEBUG, "attempting to change resolution to %dx%d\n", new_w, new_h);
+            if (av_image_check_size(new_w, new_h, 0, s->avctx) < 0)
+                return -1;
+            MPV_common_end(s);
+            avcodec_set_dimensions(s->avctx, new_w, new_h);
+            s->width  = new_w;
+            s->height = new_h;
+            if (MPV_common_init(s) < 0)
+                return -1;
+        }
 
         if(s->avctx->debug & FF_DEBUG_PICT_INFO){
             av_log(s->avctx, AV_LOG_DEBUG, "F %d/%d\n", f, v);
@@ -462,7 +382,7 @@ static int rv20_decode_picture_header(MpegEncContext *s)
     if(seq - s->time >  0x4000) seq -= 0x8000;
     if(seq - s->time < -0x4000) seq += 0x8000;
     if(seq != s->time){
-        if(s->pict_type!=B_TYPE){
+        if(s->pict_type!=AV_PICTURE_TYPE_B){
             s->time= seq;
             s->pp_time= s->time - s->last_non_b_time;
             s->last_non_b_time= s->time;
@@ -473,6 +393,7 @@ static int rv20_decode_picture_header(MpegEncContext *s)
                 av_log(s->avctx, AV_LOG_DEBUG, "messed up order, possible from seeking? skipping current b frame\n");
                 return FRAME_SKIPPED;
             }
+            ff_mpeg4_init_direct_mv(s);
         }
     }
 //    printf("%d %d %d %d %d\n", seq, (int)s->time, (int)s->last_non_b_time, s->pp_time, s->pb_time);
@@ -484,78 +405,72 @@ av_log(s->avctx, AV_LOG_DEBUG, "\n");*/
 
     s->f_code = 1;
     s->unrestricted_mv = 1;
-    s->h263_aic= s->pict_type == I_TYPE;
+    s->h263_aic= s->pict_type == AV_PICTURE_TYPE_I;
 //    s->alt_inter_vlc=1;
 //    s->obmc=1;
 //    s->umvplus=1;
     s->modified_quant=1;
-    s->loop_filter=1;
+    if(!s->avctx->lowres)
+        s->loop_filter=1;
 
     if(s->avctx->debug & FF_DEBUG_PICT_INFO){
             av_log(s->avctx, AV_LOG_INFO, "num:%5d x:%2d y:%2d type:%d qscale:%2d rnd:%d\n",
                    seq, s->mb_x, s->mb_y, s->pict_type, s->qscale, s->no_rounding);
     }
 
-    assert(s->pict_type != B_TYPE || !s->low_delay);
+    assert(s->pict_type != AV_PICTURE_TYPE_B || !s->low_delay);
 
     return s->mb_width*s->mb_height - mb_pos;
 }
 
-static int rv10_decode_init(AVCodecContext *avctx)
+static av_cold int rv10_decode_init(AVCodecContext *avctx)
 {
     MpegEncContext *s = avctx->priv_data;
     static int done=0;
 
+    if (avctx->extradata_size < 8) {
+        av_log(avctx, AV_LOG_ERROR, "Extradata is too small.\n");
+        return -1;
+    }
+
     MPV_decode_defaults(s);
 
     s->avctx= avctx;
     s->out_format = FMT_H263;
     s->codec_id= avctx->codec_id;
 
-    s->width = avctx->width;
-    s->height = avctx->height;
+    s->orig_width = s->width  = avctx->coded_width;
+    s->orig_height= s->height = avctx->coded_height;
 
-    switch(avctx->sub_id){
-    case 0x10000000:
+    s->h263_long_vectors= ((uint8_t*)avctx->extradata)[3] & 1;
+    avctx->sub_id= AV_RB32((uint8_t*)avctx->extradata + 4);
+
+    if (avctx->sub_id == 0x10000000) {
         s->rv10_version= 0;
-        s->h263_long_vectors=0;
         s->low_delay=1;
-        break;
-    case 0x10002000:
+    } else if (avctx->sub_id == 0x10001000) {
+        s->rv10_version= 3;
+        s->low_delay=1;
+    } else if (avctx->sub_id == 0x10002000) {
         s->rv10_version= 3;
-        s->h263_long_vectors=1;
         s->low_delay=1;
         s->obmc=1;
-        break;
-    case 0x10003000:
+    } else if (avctx->sub_id == 0x10003000) {
         s->rv10_version= 3;
-        s->h263_long_vectors=1;
         s->low_delay=1;
-        break;
-    case 0x10003001:
+    } else if (avctx->sub_id == 0x10003001) {
         s->rv10_version= 3;
-        s->h263_long_vectors=0;
         s->low_delay=1;
-        break;
-    case 0x20001000: /* real rv20 decoder fail on this id */
-    /*case 0x20100001:
-    case 0x20101001:
-    case 0x20103001:*/
-    case 0x20100000 ... 0x2019ffff:
+    } else if (    avctx->sub_id == 0x20001000
+               || (avctx->sub_id >= 0x20100000 && avctx->sub_id < 0x201a0000)) {
         s->low_delay=1;
-        break;
-    /*case 0x20200002:
-    case 0x20201002:
-    case 0x20203002:*/
-    case 0x20200002 ... 0x202fffff:
-    case 0x30202002:
-    case 0x30203002:
+    } else if (    avctx->sub_id == 0x30202002
+               ||  avctx->sub_id == 0x30203002
+               || (avctx->sub_id >= 0x20200002 && avctx->sub_id < 0x20300000)) {
         s->low_delay=0;
         s->avctx->has_b_frames=1;
-        break;
-    default:
+    } else
         av_log(s->avctx, AV_LOG_ERROR, "unknown header %X\n", avctx->sub_id);
-    }
 
     if(avctx->debug & FF_DEBUG_PICT_INFO){
         av_log(avctx, AV_LOG_DEBUG, "ver:%X ver0:%X\n", avctx->sub_id, avctx->extradata_size >= 4 ? ((uint32_t*)avctx->extradata)[0] : -1);
@@ -570,19 +485,19 @@ static int rv10_decode_init(AVCodecContext *avctx)
 
     /* init rv vlc */
     if (!done) {
-        init_vlc(&rv_dc_lum, DC_VLC_BITS, 256,
+        INIT_VLC_STATIC(&rv_dc_lum, DC_VLC_BITS, 256,
                  rv_lum_bits, 1, 1,
-                 rv_lum_code, 2, 2, 1);
-        init_vlc(&rv_dc_chrom, DC_VLC_BITS, 256,
+                 rv_lum_code, 2, 2, 16384);
+        INIT_VLC_STATIC(&rv_dc_chrom, DC_VLC_BITS, 256,
                  rv_chrom_bits, 1, 1,
-                 rv_chrom_code, 2, 2, 1);
+                 rv_chrom_code, 2, 2, 16388);
         done = 1;
     }
 
     return 0;
 }
 
-static int rv10_decode_end(AVCodecContext *avctx)
+static av_cold int rv10_decode_end(AVCodecContext *avctx)
 {
     MpegEncContext *s = avctx->priv_data;
 
@@ -591,10 +506,10 @@ static int rv10_decode_end(AVCodecContext *avctx)
 }
 
 static int rv10_decode_packet(AVCodecContext *avctx,
-                             uint8_t *buf, int buf_size)
+                             const uint8_t *buf, int buf_size, int buf_size2)
 {
     MpegEncContext *s = avctx->priv_data;
-    int mb_count, mb_pos, left;
+    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)
@@ -617,7 +532,6 @@ static int rv10_decode_packet(AVCodecContext *avctx,
         av_log(s->avctx, AV_LOG_ERROR, "COUNT ERROR\n");
         return -1;
     }
-//if(s->pict_type == 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?
@@ -630,9 +544,7 @@ static int rv10_decode_packet(AVCodecContext *avctx,
         ff_er_frame_start(s);
     }
 
-#ifdef DEBUG
-    printf("qscale=%d\n", s->qscale);
-#endif
+    av_dlog(avctx, "qscale=%d\n", s->qscale);
 
     /* default quantization values */
     if(s->codec_id== CODEC_ID_RV10){
@@ -640,8 +552,9 @@ static int rv10_decode_packet(AVCodecContext *avctx,
     }else{
         s->first_slice_line=1;
         s->resync_mb_x= s->mb_x;
-        s->resync_mb_y= s->mb_y;
     }
+    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;
@@ -658,7 +571,6 @@ static int rv10_decode_packet(AVCodecContext *avctx,
     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]=
@@ -671,19 +583,23 @@ static int rv10_decode_packet(AVCodecContext *avctx,
     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
-        printf("**mb x=%d y=%d\n", s->mb_x, s->mb_y);
-#endif
+        av_dlog(avctx, "**mb x=%d y=%d\n", s->mb_x, s->mb_y);
 
         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) && 8*buf_size2 >= get_bits_count(&s->gb)){
+            av_log(avctx, AV_LOG_DEBUG, "update size from %d to %d\n", s->gb.size_in_bits, 8*buf_size2);
+            s->gb.size_in_bits= 8*buf_size2;
+            ret= SLICE_OK;
+        }
+
         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 != B_TYPE)
+        if(s->pict_type != AV_PICTURE_TYPE_B)
             ff_h263_update_motion_val(s);
         MPV_decode_mb(s, s->block);
         if(s->loop_filter)
@@ -699,78 +615,99 @@ static int rv10_decode_packet(AVCodecContext *avctx,
         if(ret == SLICE_END) break;
     }
 
-    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);
+    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;
+    return s->gb.size_in_bits;
+}
+
+static int get_slice_offset(AVCodecContext *avctx, const uint8_t *buf, int n)
+{
+    if(avctx->slice_count) return avctx->slice_offset[n];
+    else                   return AV_RL32(buf + n*8);
 }
 
 static int rv10_decode_frame(AVCodecContext *avctx,
                              void *data, int *data_size,
-                             uint8_t *buf, int buf_size)
+                             AVPacket *avpkt)
 {
+    const uint8_t *buf = avpkt->data;
+    int buf_size = avpkt->size;
     MpegEncContext *s = avctx->priv_data;
     int i;
     AVFrame *pict = data;
+    int slice_count;
+    const uint8_t *slices_hdr = NULL;
 
-#ifdef DEBUG
-    printf("*****frame %d size=%d\n", avctx->frame_number, buf_size);
-#endif
+    av_dlog(avctx, "*****frame %d size=%d\n", avctx->frame_number, buf_size);
 
     /* no supplementary picture */
     if (buf_size == 0) {
         return 0;
     }
 
-    if(avctx->slice_count){
-        for(i=0; i<avctx->slice_count; i++){
-            int offset= avctx->slice_offset[i];
-            int size;
+    if(!avctx->slice_count){
+        slice_count = (*buf++) + 1;
+        slices_hdr = buf + 4;
+        buf += 8 * slice_count;
+    }else
+        slice_count = avctx->slice_count;
 
-            if(i+1 == avctx->slice_count)
-                size= buf_size - offset;
-            else
-                size= avctx->slice_offset[i+1] - offset;
+    for(i=0; i<slice_count; i++){
+        int offset= get_slice_offset(avctx, slices_hdr, i);
+        int size, size2;
 
-            rv10_decode_packet(avctx, buf+offset, size);
-        }
-    }else{
-        rv10_decode_packet(avctx, buf, buf_size);
+        if(i+1 == slice_count)
+            size= buf_size - offset;
+        else
+            size= get_slice_offset(avctx, slices_hdr, i+1) - offset;
+
+        if(i+2 >= slice_count)
+            size2= buf_size - offset;
+        else
+            size2= get_slice_offset(avctx, slices_hdr, i+2) - offset;
+
+        if(rv10_decode_packet(avctx, buf+offset, size, size2) > 8*size)
+            i++;
     }
 
-    if(s->mb_y>=s->mb_height){
+    if(s->current_picture_ptr != NULL && s->mb_y>=s->mb_height){
         ff_er_frame_end(s);
         MPV_frame_end(s);
 
-        if(s->pict_type==B_TYPE || s->low_delay){
-            *pict= *(AVFrame*)&s->current_picture;
-            ff_print_debug_info(s, pict);
-        } else {
-            *pict= *(AVFrame*)&s->last_picture;
-            ff_print_debug_info(s, pict);
+        if (s->pict_type == AV_PICTURE_TYPE_B || s->low_delay) {
+            *pict= *(AVFrame*)s->current_picture_ptr;
+        } else if (s->last_picture_ptr != NULL) {
+            *pict= *(AVFrame*)s->last_picture_ptr;
         }
-        if(s->last_picture_ptr || s->low_delay)
+
+        if(s->last_picture_ptr || s->low_delay){
             *data_size = sizeof(AVFrame);
+            ff_print_debug_info(s, pict);
+        }
         s->current_picture_ptr= NULL; //so we can detect if frame_end wasnt called (find some nicer solution...)
     }
 
     return buf_size;
 }
 
-AVCodec rv10_decoder = {
+AVCodec ff_rv10_decoder = {
     "rv10",
-    CODEC_TYPE_VIDEO,
+    AVMEDIA_TYPE_VIDEO,
     CODEC_ID_RV10,
     sizeof(MpegEncContext),
     rv10_decode_init,
     NULL,
     rv10_decode_end,
     rv10_decode_frame,
-    CODEC_CAP_DR1
+    CODEC_CAP_DR1,
+    .max_lowres = 3,
+    .long_name = NULL_IF_CONFIG_SMALL("RealVideo 1.0"),
+    .pix_fmts= ff_pixfmt_list_420,
 };
 
-AVCodec rv20_decoder = {
+AVCodec ff_rv20_decoder = {
     "rv20",
-    CODEC_TYPE_VIDEO,
+    AVMEDIA_TYPE_VIDEO,
     CODEC_ID_RV20,
     sizeof(MpegEncContext),
     rv10_decode_init,
@@ -779,5 +716,7 @@ AVCodec rv20_decoder = {
     rv10_decode_frame,
     CODEC_CAP_DR1 | CODEC_CAP_DELAY,
     .flush= ff_mpeg_flush,
+    .max_lowres = 3,
+    .long_name = NULL_IF_CONFIG_SMALL("RealVideo 2.0"),
+    .pix_fmts= ff_pixfmt_list_420,
 };
-