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libavcodec/rv10.c

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00001 /*
00002  * RV10/RV20 decoder
00003  * Copyright (c) 2000,2001 Fabrice Bellard
00004  * Copyright (c) 2002-2004 Michael Niedermayer
00005  *
00006  * This file is part of Libav.
00007  *
00008  * Libav is free software; you can redistribute it and/or
00009  * modify it under the terms of the GNU Lesser General Public
00010  * License as published by the Free Software Foundation; either
00011  * version 2.1 of the License, or (at your option) any later version.
00012  *
00013  * Libav is distributed in the hope that it will be useful,
00014  * but WITHOUT ANY WARRANTY; without even the implied warranty of
00015  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
00016  * Lesser General Public License for more details.
00017  *
00018  * You should have received a copy of the GNU Lesser General Public
00019  * License along with Libav; if not, write to the Free Software
00020  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
00021  */
00022 
00028 #include "libavutil/imgutils.h"
00029 #include "avcodec.h"
00030 #include "dsputil.h"
00031 #include "mpegvideo.h"
00032 #include "mpeg4video.h"
00033 #include "h263.h"
00034 
00035 //#define DEBUG
00036 
00037 #define RV_GET_MAJOR_VER(x)  ((x) >> 28)
00038 #define RV_GET_MINOR_VER(x) (((x) >> 20) & 0xFF)
00039 #define RV_GET_MICRO_VER(x) (((x) >> 12) & 0xFF)
00040 
00041 #define DC_VLC_BITS 14 //FIXME find a better solution
00042 
00043 static const uint16_t rv_lum_code[256] =
00044 {
00045  0x3e7f, 0x0f00, 0x0f01, 0x0f02, 0x0f03, 0x0f04, 0x0f05, 0x0f06,
00046  0x0f07, 0x0f08, 0x0f09, 0x0f0a, 0x0f0b, 0x0f0c, 0x0f0d, 0x0f0e,
00047  0x0f0f, 0x0f10, 0x0f11, 0x0f12, 0x0f13, 0x0f14, 0x0f15, 0x0f16,
00048  0x0f17, 0x0f18, 0x0f19, 0x0f1a, 0x0f1b, 0x0f1c, 0x0f1d, 0x0f1e,
00049  0x0f1f, 0x0f20, 0x0f21, 0x0f22, 0x0f23, 0x0f24, 0x0f25, 0x0f26,
00050  0x0f27, 0x0f28, 0x0f29, 0x0f2a, 0x0f2b, 0x0f2c, 0x0f2d, 0x0f2e,
00051  0x0f2f, 0x0f30, 0x0f31, 0x0f32, 0x0f33, 0x0f34, 0x0f35, 0x0f36,
00052  0x0f37, 0x0f38, 0x0f39, 0x0f3a, 0x0f3b, 0x0f3c, 0x0f3d, 0x0f3e,
00053  0x0f3f, 0x0380, 0x0381, 0x0382, 0x0383, 0x0384, 0x0385, 0x0386,
00054  0x0387, 0x0388, 0x0389, 0x038a, 0x038b, 0x038c, 0x038d, 0x038e,
00055  0x038f, 0x0390, 0x0391, 0x0392, 0x0393, 0x0394, 0x0395, 0x0396,
00056  0x0397, 0x0398, 0x0399, 0x039a, 0x039b, 0x039c, 0x039d, 0x039e,
00057  0x039f, 0x00c0, 0x00c1, 0x00c2, 0x00c3, 0x00c4, 0x00c5, 0x00c6,
00058  0x00c7, 0x00c8, 0x00c9, 0x00ca, 0x00cb, 0x00cc, 0x00cd, 0x00ce,
00059  0x00cf, 0x0050, 0x0051, 0x0052, 0x0053, 0x0054, 0x0055, 0x0056,
00060  0x0057, 0x0020, 0x0021, 0x0022, 0x0023, 0x000c, 0x000d, 0x0004,
00061  0x0000, 0x0005, 0x000e, 0x000f, 0x0024, 0x0025, 0x0026, 0x0027,
00062  0x0058, 0x0059, 0x005a, 0x005b, 0x005c, 0x005d, 0x005e, 0x005f,
00063  0x00d0, 0x00d1, 0x00d2, 0x00d3, 0x00d4, 0x00d5, 0x00d6, 0x00d7,
00064  0x00d8, 0x00d9, 0x00da, 0x00db, 0x00dc, 0x00dd, 0x00de, 0x00df,
00065  0x03a0, 0x03a1, 0x03a2, 0x03a3, 0x03a4, 0x03a5, 0x03a6, 0x03a7,
00066  0x03a8, 0x03a9, 0x03aa, 0x03ab, 0x03ac, 0x03ad, 0x03ae, 0x03af,
00067  0x03b0, 0x03b1, 0x03b2, 0x03b3, 0x03b4, 0x03b5, 0x03b6, 0x03b7,
00068  0x03b8, 0x03b9, 0x03ba, 0x03bb, 0x03bc, 0x03bd, 0x03be, 0x03bf,
00069  0x0f40, 0x0f41, 0x0f42, 0x0f43, 0x0f44, 0x0f45, 0x0f46, 0x0f47,
00070  0x0f48, 0x0f49, 0x0f4a, 0x0f4b, 0x0f4c, 0x0f4d, 0x0f4e, 0x0f4f,
00071  0x0f50, 0x0f51, 0x0f52, 0x0f53, 0x0f54, 0x0f55, 0x0f56, 0x0f57,
00072  0x0f58, 0x0f59, 0x0f5a, 0x0f5b, 0x0f5c, 0x0f5d, 0x0f5e, 0x0f5f,
00073  0x0f60, 0x0f61, 0x0f62, 0x0f63, 0x0f64, 0x0f65, 0x0f66, 0x0f67,
00074  0x0f68, 0x0f69, 0x0f6a, 0x0f6b, 0x0f6c, 0x0f6d, 0x0f6e, 0x0f6f,
00075  0x0f70, 0x0f71, 0x0f72, 0x0f73, 0x0f74, 0x0f75, 0x0f76, 0x0f77,
00076  0x0f78, 0x0f79, 0x0f7a, 0x0f7b, 0x0f7c, 0x0f7d, 0x0f7e, 0x0f7f,
00077 };
00078 
00079 static const uint8_t rv_lum_bits[256] =
00080 {
00081  14, 12, 12, 12, 12, 12, 12, 12,
00082  12, 12, 12, 12, 12, 12, 12, 12,
00083  12, 12, 12, 12, 12, 12, 12, 12,
00084  12, 12, 12, 12, 12, 12, 12, 12,
00085  12, 12, 12, 12, 12, 12, 12, 12,
00086  12, 12, 12, 12, 12, 12, 12, 12,
00087  12, 12, 12, 12, 12, 12, 12, 12,
00088  12, 12, 12, 12, 12, 12, 12, 12,
00089  12, 10, 10, 10, 10, 10, 10, 10,
00090  10, 10, 10, 10, 10, 10, 10, 10,
00091  10, 10, 10, 10, 10, 10, 10, 10,
00092  10, 10, 10, 10, 10, 10, 10, 10,
00093  10,  8,  8,  8,  8,  8,  8,  8,
00094   8,  8,  8,  8,  8,  8,  8,  8,
00095   8,  7,  7,  7,  7,  7,  7,  7,
00096   7,  6,  6,  6,  6,  5,  5,  4,
00097   2,  4,  5,  5,  6,  6,  6,  6,
00098   7,  7,  7,  7,  7,  7,  7,  7,
00099   8,  8,  8,  8,  8,  8,  8,  8,
00100   8,  8,  8,  8,  8,  8,  8,  8,
00101  10, 10, 10, 10, 10, 10, 10, 10,
00102  10, 10, 10, 10, 10, 10, 10, 10,
00103  10, 10, 10, 10, 10, 10, 10, 10,
00104  10, 10, 10, 10, 10, 10, 10, 10,
00105  12, 12, 12, 12, 12, 12, 12, 12,
00106  12, 12, 12, 12, 12, 12, 12, 12,
00107  12, 12, 12, 12, 12, 12, 12, 12,
00108  12, 12, 12, 12, 12, 12, 12, 12,
00109  12, 12, 12, 12, 12, 12, 12, 12,
00110  12, 12, 12, 12, 12, 12, 12, 12,
00111  12, 12, 12, 12, 12, 12, 12, 12,
00112  12, 12, 12, 12, 12, 12, 12, 12,
00113 };
00114 
00115 static const uint16_t rv_chrom_code[256] =
00116 {
00117  0xfe7f, 0x3f00, 0x3f01, 0x3f02, 0x3f03, 0x3f04, 0x3f05, 0x3f06,
00118  0x3f07, 0x3f08, 0x3f09, 0x3f0a, 0x3f0b, 0x3f0c, 0x3f0d, 0x3f0e,
00119  0x3f0f, 0x3f10, 0x3f11, 0x3f12, 0x3f13, 0x3f14, 0x3f15, 0x3f16,
00120  0x3f17, 0x3f18, 0x3f19, 0x3f1a, 0x3f1b, 0x3f1c, 0x3f1d, 0x3f1e,
00121  0x3f1f, 0x3f20, 0x3f21, 0x3f22, 0x3f23, 0x3f24, 0x3f25, 0x3f26,
00122  0x3f27, 0x3f28, 0x3f29, 0x3f2a, 0x3f2b, 0x3f2c, 0x3f2d, 0x3f2e,
00123  0x3f2f, 0x3f30, 0x3f31, 0x3f32, 0x3f33, 0x3f34, 0x3f35, 0x3f36,
00124  0x3f37, 0x3f38, 0x3f39, 0x3f3a, 0x3f3b, 0x3f3c, 0x3f3d, 0x3f3e,
00125  0x3f3f, 0x0f80, 0x0f81, 0x0f82, 0x0f83, 0x0f84, 0x0f85, 0x0f86,
00126  0x0f87, 0x0f88, 0x0f89, 0x0f8a, 0x0f8b, 0x0f8c, 0x0f8d, 0x0f8e,
00127  0x0f8f, 0x0f90, 0x0f91, 0x0f92, 0x0f93, 0x0f94, 0x0f95, 0x0f96,
00128  0x0f97, 0x0f98, 0x0f99, 0x0f9a, 0x0f9b, 0x0f9c, 0x0f9d, 0x0f9e,
00129  0x0f9f, 0x03c0, 0x03c1, 0x03c2, 0x03c3, 0x03c4, 0x03c5, 0x03c6,
00130  0x03c7, 0x03c8, 0x03c9, 0x03ca, 0x03cb, 0x03cc, 0x03cd, 0x03ce,
00131  0x03cf, 0x00e0, 0x00e1, 0x00e2, 0x00e3, 0x00e4, 0x00e5, 0x00e6,
00132  0x00e7, 0x0030, 0x0031, 0x0032, 0x0033, 0x0008, 0x0009, 0x0002,
00133  0x0000, 0x0003, 0x000a, 0x000b, 0x0034, 0x0035, 0x0036, 0x0037,
00134  0x00e8, 0x00e9, 0x00ea, 0x00eb, 0x00ec, 0x00ed, 0x00ee, 0x00ef,
00135  0x03d0, 0x03d1, 0x03d2, 0x03d3, 0x03d4, 0x03d5, 0x03d6, 0x03d7,
00136  0x03d8, 0x03d9, 0x03da, 0x03db, 0x03dc, 0x03dd, 0x03de, 0x03df,
00137  0x0fa0, 0x0fa1, 0x0fa2, 0x0fa3, 0x0fa4, 0x0fa5, 0x0fa6, 0x0fa7,
00138  0x0fa8, 0x0fa9, 0x0faa, 0x0fab, 0x0fac, 0x0fad, 0x0fae, 0x0faf,
00139  0x0fb0, 0x0fb1, 0x0fb2, 0x0fb3, 0x0fb4, 0x0fb5, 0x0fb6, 0x0fb7,
00140  0x0fb8, 0x0fb9, 0x0fba, 0x0fbb, 0x0fbc, 0x0fbd, 0x0fbe, 0x0fbf,
00141  0x3f40, 0x3f41, 0x3f42, 0x3f43, 0x3f44, 0x3f45, 0x3f46, 0x3f47,
00142  0x3f48, 0x3f49, 0x3f4a, 0x3f4b, 0x3f4c, 0x3f4d, 0x3f4e, 0x3f4f,
00143  0x3f50, 0x3f51, 0x3f52, 0x3f53, 0x3f54, 0x3f55, 0x3f56, 0x3f57,
00144  0x3f58, 0x3f59, 0x3f5a, 0x3f5b, 0x3f5c, 0x3f5d, 0x3f5e, 0x3f5f,
00145  0x3f60, 0x3f61, 0x3f62, 0x3f63, 0x3f64, 0x3f65, 0x3f66, 0x3f67,
00146  0x3f68, 0x3f69, 0x3f6a, 0x3f6b, 0x3f6c, 0x3f6d, 0x3f6e, 0x3f6f,
00147  0x3f70, 0x3f71, 0x3f72, 0x3f73, 0x3f74, 0x3f75, 0x3f76, 0x3f77,
00148  0x3f78, 0x3f79, 0x3f7a, 0x3f7b, 0x3f7c, 0x3f7d, 0x3f7e, 0x3f7f,
00149 };
00150 
00151 static const uint8_t rv_chrom_bits[256] =
00152 {
00153  16, 14, 14, 14, 14, 14, 14, 14,
00154  14, 14, 14, 14, 14, 14, 14, 14,
00155  14, 14, 14, 14, 14, 14, 14, 14,
00156  14, 14, 14, 14, 14, 14, 14, 14,
00157  14, 14, 14, 14, 14, 14, 14, 14,
00158  14, 14, 14, 14, 14, 14, 14, 14,
00159  14, 14, 14, 14, 14, 14, 14, 14,
00160  14, 14, 14, 14, 14, 14, 14, 14,
00161  14, 12, 12, 12, 12, 12, 12, 12,
00162  12, 12, 12, 12, 12, 12, 12, 12,
00163  12, 12, 12, 12, 12, 12, 12, 12,
00164  12, 12, 12, 12, 12, 12, 12, 12,
00165  12, 10, 10, 10, 10, 10, 10, 10,
00166  10, 10, 10, 10, 10, 10, 10, 10,
00167  10,  8,  8,  8,  8,  8,  8,  8,
00168   8,  6,  6,  6,  6,  4,  4,  3,
00169   2,  3,  4,  4,  6,  6,  6,  6,
00170   8,  8,  8,  8,  8,  8,  8,  8,
00171  10, 10, 10, 10, 10, 10, 10, 10,
00172  10, 10, 10, 10, 10, 10, 10, 10,
00173  12, 12, 12, 12, 12, 12, 12, 12,
00174  12, 12, 12, 12, 12, 12, 12, 12,
00175  12, 12, 12, 12, 12, 12, 12, 12,
00176  12, 12, 12, 12, 12, 12, 12, 12,
00177  14, 14, 14, 14, 14, 14, 14, 14,
00178  14, 14, 14, 14, 14, 14, 14, 14,
00179  14, 14, 14, 14, 14, 14, 14, 14,
00180  14, 14, 14, 14, 14, 14, 14, 14,
00181  14, 14, 14, 14, 14, 14, 14, 14,
00182  14, 14, 14, 14, 14, 14, 14, 14,
00183  14, 14, 14, 14, 14, 14, 14, 14,
00184  14, 14, 14, 14, 14, 14, 14, 14,
00185 };
00186 
00187 static VLC rv_dc_lum, rv_dc_chrom;
00188 
00189 int rv_decode_dc(MpegEncContext *s, int n)
00190 {
00191     int code;
00192 
00193     if (n < 4) {
00194         code = get_vlc2(&s->gb, rv_dc_lum.table, DC_VLC_BITS, 2);
00195         if (code < 0) {
00196             /* XXX: I don't understand why they use LONGER codes than
00197                necessary. The following code would be completely useless
00198                if they had thought about it !!! */
00199             code = get_bits(&s->gb, 7);
00200             if (code == 0x7c) {
00201                 code = (int8_t)(get_bits(&s->gb, 7) + 1);
00202             } else if (code == 0x7d) {
00203                 code = -128 + get_bits(&s->gb, 7);
00204             } else if (code == 0x7e) {
00205                 if (get_bits1(&s->gb) == 0)
00206                     code = (int8_t)(get_bits(&s->gb, 8) + 1);
00207                 else
00208                     code = (int8_t)(get_bits(&s->gb, 8));
00209             } else if (code == 0x7f) {
00210                 skip_bits(&s->gb, 11);
00211                 code = 1;
00212             }
00213         } else {
00214             code -= 128;
00215         }
00216     } else {
00217         code = get_vlc2(&s->gb, rv_dc_chrom.table, DC_VLC_BITS, 2);
00218         /* same remark */
00219         if (code < 0) {
00220             code = get_bits(&s->gb, 9);
00221             if (code == 0x1fc) {
00222                 code = (int8_t)(get_bits(&s->gb, 7) + 1);
00223             } else if (code == 0x1fd) {
00224                 code = -128 + get_bits(&s->gb, 7);
00225             } else if (code == 0x1fe) {
00226                 skip_bits(&s->gb, 9);
00227                 code = 1;
00228             } else {
00229                 av_log(s->avctx, AV_LOG_ERROR, "chroma dc error\n");
00230                 return 0xffff;
00231             }
00232         } else {
00233             code -= 128;
00234         }
00235     }
00236     return -code;
00237 }
00238 
00239 /* read RV 1.0 compatible frame header */
00240 static int rv10_decode_picture_header(MpegEncContext *s)
00241 {
00242     int mb_count, pb_frame, marker, mb_xy;
00243 
00244     marker = get_bits1(&s->gb);
00245 
00246     if (get_bits1(&s->gb))
00247         s->pict_type = AV_PICTURE_TYPE_P;
00248     else
00249         s->pict_type = AV_PICTURE_TYPE_I;
00250     if(!marker) av_log(s->avctx, AV_LOG_ERROR, "marker missing\n");
00251     pb_frame = get_bits1(&s->gb);
00252 
00253     av_dlog(s->avctx, "pict_type=%d pb_frame=%d\n", s->pict_type, pb_frame);
00254 
00255     if (pb_frame){
00256         av_log(s->avctx, AV_LOG_ERROR, "pb frame not supported\n");
00257         return -1;
00258     }
00259 
00260     s->qscale = get_bits(&s->gb, 5);
00261     if(s->qscale==0){
00262         av_log(s->avctx, AV_LOG_ERROR, "error, qscale:0\n");
00263         return -1;
00264     }
00265 
00266     if (s->pict_type == AV_PICTURE_TYPE_I) {
00267         if (s->rv10_version == 3) {
00268             /* specific MPEG like DC coding not used */
00269             s->last_dc[0] = get_bits(&s->gb, 8);
00270             s->last_dc[1] = get_bits(&s->gb, 8);
00271             s->last_dc[2] = get_bits(&s->gb, 8);
00272             av_dlog(s->avctx, "DC:%d %d %d\n", s->last_dc[0],
00273                     s->last_dc[1], s->last_dc[2]);
00274         }
00275     }
00276     /* if multiple packets per frame are sent, the position at which
00277        to display the macroblocks is coded here */
00278 
00279     mb_xy= s->mb_x + s->mb_y*s->mb_width;
00280     if(show_bits(&s->gb, 12)==0 || (mb_xy && mb_xy < s->mb_num)){
00281         s->mb_x = get_bits(&s->gb, 6); /* mb_x */
00282         s->mb_y = get_bits(&s->gb, 6); /* mb_y */
00283         mb_count = get_bits(&s->gb, 12);
00284     } else {
00285         s->mb_x = 0;
00286         s->mb_y = 0;
00287         mb_count = s->mb_width * s->mb_height;
00288     }
00289     skip_bits(&s->gb, 3);   /* ignored */
00290     s->f_code = 1;
00291     s->unrestricted_mv = 1;
00292 
00293     return mb_count;
00294 }
00295 
00296 static int rv20_decode_picture_header(MpegEncContext *s)
00297 {
00298     int seq, mb_pos, i;
00299     int rpr_bits;
00300 
00301     i= get_bits(&s->gb, 2);
00302     switch(i){
00303     case 0: s->pict_type= AV_PICTURE_TYPE_I; break;
00304     case 1: s->pict_type= AV_PICTURE_TYPE_I; break; //hmm ...
00305     case 2: s->pict_type= AV_PICTURE_TYPE_P; break;
00306     case 3: s->pict_type= AV_PICTURE_TYPE_B; break;
00307     default:
00308         av_log(s->avctx, AV_LOG_ERROR, "unknown frame type\n");
00309         return -1;
00310     }
00311 
00312     if(s->last_picture_ptr==NULL && s->pict_type==AV_PICTURE_TYPE_B){
00313         av_log(s->avctx, AV_LOG_ERROR, "early B pix\n");
00314         return -1;
00315     }
00316 
00317     if (get_bits1(&s->gb)){
00318         av_log(s->avctx, AV_LOG_ERROR, "reserved bit set\n");
00319         return -1;
00320     }
00321 
00322     s->qscale = get_bits(&s->gb, 5);
00323     if(s->qscale==0){
00324         av_log(s->avctx, AV_LOG_ERROR, "error, qscale:0\n");
00325         return -1;
00326     }
00327 
00328     if(RV_GET_MINOR_VER(s->avctx->sub_id) >= 2)
00329         s->loop_filter = get_bits1(&s->gb);
00330 
00331     if(RV_GET_MINOR_VER(s->avctx->sub_id) <= 1)
00332         seq = get_bits(&s->gb, 8) << 7;
00333     else
00334         seq = get_bits(&s->gb, 13) << 2;
00335 
00336     rpr_bits = s->avctx->extradata[1] & 7;
00337     if(rpr_bits){
00338         int f, new_w, new_h;
00339         rpr_bits = FFMIN((rpr_bits >> 1) + 1, 3);
00340 
00341         f = get_bits(&s->gb, rpr_bits);
00342 
00343         if(f){
00344             new_w= 4*((uint8_t*)s->avctx->extradata)[6+2*f];
00345             new_h= 4*((uint8_t*)s->avctx->extradata)[7+2*f];
00346         }else{
00347             new_w= s->orig_width ;
00348             new_h= s->orig_height;
00349         }
00350         if(new_w != s->width || new_h != s->height){
00351             av_log(s->avctx, AV_LOG_DEBUG, "attempting to change resolution to %dx%d\n", new_w, new_h);
00352             if (av_image_check_size(new_w, new_h, 0, s->avctx) < 0)
00353                 return -1;
00354             MPV_common_end(s);
00355             avcodec_set_dimensions(s->avctx, new_w, new_h);
00356             s->width  = new_w;
00357             s->height = new_h;
00358             if (MPV_common_init(s) < 0)
00359                 return -1;
00360         }
00361 
00362         if(s->avctx->debug & FF_DEBUG_PICT_INFO){
00363             av_log(s->avctx, AV_LOG_DEBUG, "F %d/%d\n", f, rpr_bits);
00364         }
00365     } else if (av_image_check_size(s->width, s->height, 0, s->avctx) < 0)
00366         return AVERROR_INVALIDDATA;
00367 
00368     mb_pos = ff_h263_decode_mba(s);
00369 
00370 //av_log(s->avctx, AV_LOG_DEBUG, "%d\n", seq);
00371     seq |= s->time &~0x7FFF;
00372     if(seq - s->time >  0x4000) seq -= 0x8000;
00373     if(seq - s->time < -0x4000) seq += 0x8000;
00374     if(seq != s->time){
00375         if(s->pict_type!=AV_PICTURE_TYPE_B){
00376             s->time= seq;
00377             s->pp_time= s->time - s->last_non_b_time;
00378             s->last_non_b_time= s->time;
00379         }else{
00380             s->time= seq;
00381             s->pb_time= s->pp_time - (s->last_non_b_time - s->time);
00382             if(s->pp_time <=s->pb_time || s->pp_time <= s->pp_time - s->pb_time || s->pp_time<=0){
00383                 av_log(s->avctx, AV_LOG_DEBUG, "messed up order, possible from seeking? skipping current b frame\n");
00384                 return FRAME_SKIPPED;
00385             }
00386             ff_mpeg4_init_direct_mv(s);
00387         }
00388     }
00389 //    printf("%d %d %d %d %d\n", seq, (int)s->time, (int)s->last_non_b_time, s->pp_time, s->pb_time);
00390 /*for(i=0; i<32; i++){
00391     av_log(s->avctx, AV_LOG_DEBUG, "%d", get_bits1(&s->gb));
00392 }
00393 av_log(s->avctx, AV_LOG_DEBUG, "\n");*/
00394     s->no_rounding= get_bits1(&s->gb);
00395 
00396     if(RV_GET_MINOR_VER(s->avctx->sub_id) <= 1 && s->pict_type == AV_PICTURE_TYPE_B)
00397         skip_bits(&s->gb, 5); // binary decoder reads 3+2 bits here but they don't seem to be used
00398 
00399     s->f_code = 1;
00400     s->unrestricted_mv = 1;
00401     s->h263_aic= s->pict_type == AV_PICTURE_TYPE_I;
00402 //    s->alt_inter_vlc=1;
00403 //    s->obmc=1;
00404 //    s->umvplus=1;
00405     s->modified_quant=1;
00406     if(!s->avctx->lowres)
00407         s->loop_filter=1;
00408 
00409     if(s->avctx->debug & FF_DEBUG_PICT_INFO){
00410             av_log(s->avctx, AV_LOG_INFO, "num:%5d x:%2d y:%2d type:%d qscale:%2d rnd:%d\n",
00411                    seq, s->mb_x, s->mb_y, s->pict_type, s->qscale, s->no_rounding);
00412     }
00413 
00414     assert(s->pict_type != AV_PICTURE_TYPE_B || !s->low_delay);
00415 
00416     return s->mb_width*s->mb_height - mb_pos;
00417 }
00418 
00419 static av_cold int rv10_decode_init(AVCodecContext *avctx)
00420 {
00421     MpegEncContext *s = avctx->priv_data;
00422     static int done=0;
00423     int major_ver, minor_ver, micro_ver;
00424 
00425     if (avctx->extradata_size < 8) {
00426         av_log(avctx, AV_LOG_ERROR, "Extradata is too small.\n");
00427         return -1;
00428     }
00429 
00430     MPV_decode_defaults(s);
00431 
00432     s->avctx= avctx;
00433     s->out_format = FMT_H263;
00434     s->codec_id= avctx->codec_id;
00435     avctx->flags |= CODEC_FLAG_EMU_EDGE;
00436 
00437     s->orig_width = s->width  = avctx->coded_width;
00438     s->orig_height= s->height = avctx->coded_height;
00439 
00440     s->h263_long_vectors= ((uint8_t*)avctx->extradata)[3] & 1;
00441     avctx->sub_id= AV_RB32((uint8_t*)avctx->extradata + 4);
00442 
00443     major_ver = RV_GET_MAJOR_VER(avctx->sub_id);
00444     minor_ver = RV_GET_MINOR_VER(avctx->sub_id);
00445     micro_ver = RV_GET_MICRO_VER(avctx->sub_id);
00446 
00447     s->low_delay = 1;
00448     switch (major_ver) {
00449     case 1:
00450         s->rv10_version = micro_ver ? 3 : 1;
00451         s->obmc = micro_ver == 2;
00452         break;
00453     case 2:
00454         if (minor_ver >= 2) {
00455             s->low_delay = 0;
00456             s->avctx->has_b_frames = 1;
00457         }
00458         break;
00459     default:
00460         av_log(s->avctx, AV_LOG_ERROR, "unknown header %X\n", avctx->sub_id);
00461         av_log_missing_feature(avctx, "RV1/2 version", 1);
00462         return AVERROR_PATCHWELCOME;
00463     }
00464 
00465     if(avctx->debug & FF_DEBUG_PICT_INFO){
00466         av_log(avctx, AV_LOG_DEBUG, "ver:%X ver0:%X\n", avctx->sub_id, avctx->extradata_size >= 4 ? ((uint32_t*)avctx->extradata)[0] : -1);
00467     }
00468 
00469     avctx->pix_fmt = PIX_FMT_YUV420P;
00470 
00471     if (MPV_common_init(s) < 0)
00472         return -1;
00473 
00474     h263_decode_init_vlc(s);
00475 
00476     /* init rv vlc */
00477     if (!done) {
00478         INIT_VLC_STATIC(&rv_dc_lum, DC_VLC_BITS, 256,
00479                  rv_lum_bits, 1, 1,
00480                  rv_lum_code, 2, 2, 16384);
00481         INIT_VLC_STATIC(&rv_dc_chrom, DC_VLC_BITS, 256,
00482                  rv_chrom_bits, 1, 1,
00483                  rv_chrom_code, 2, 2, 16388);
00484         done = 1;
00485     }
00486 
00487     return 0;
00488 }
00489 
00490 static av_cold int rv10_decode_end(AVCodecContext *avctx)
00491 {
00492     MpegEncContext *s = avctx->priv_data;
00493 
00494     MPV_common_end(s);
00495     return 0;
00496 }
00497 
00498 static int rv10_decode_packet(AVCodecContext *avctx,
00499                              const uint8_t *buf, int buf_size, int buf_size2)
00500 {
00501     MpegEncContext *s = avctx->priv_data;
00502     int mb_count, mb_pos, left, start_mb_x;
00503 
00504     init_get_bits(&s->gb, buf, buf_size*8);
00505     if(s->codec_id ==CODEC_ID_RV10)
00506         mb_count = rv10_decode_picture_header(s);
00507     else
00508         mb_count = rv20_decode_picture_header(s);
00509     if (mb_count < 0) {
00510         av_log(s->avctx, AV_LOG_ERROR, "HEADER ERROR\n");
00511         return -1;
00512     }
00513 
00514     if (s->mb_x >= s->mb_width ||
00515         s->mb_y >= s->mb_height) {
00516         av_log(s->avctx, AV_LOG_ERROR, "POS ERROR %d %d\n", s->mb_x, s->mb_y);
00517         return -1;
00518     }
00519     mb_pos = s->mb_y * s->mb_width + s->mb_x;
00520     left = s->mb_width * s->mb_height - mb_pos;
00521     if (mb_count > left) {
00522         av_log(s->avctx, AV_LOG_ERROR, "COUNT ERROR\n");
00523         return -1;
00524     }
00525 
00526     if ((s->mb_x == 0 && s->mb_y == 0) || s->current_picture_ptr==NULL) {
00527         if(s->current_picture_ptr){ //FIXME write parser so we always have complete frames?
00528             ff_er_frame_end(s);
00529             MPV_frame_end(s);
00530             s->mb_x= s->mb_y = s->resync_mb_x = s->resync_mb_y= 0;
00531         }
00532         if(MPV_frame_start(s, avctx) < 0)
00533             return -1;
00534         ff_er_frame_start(s);
00535     } else {
00536         if (s->current_picture_ptr->f.pict_type != s->pict_type) {
00537             av_log(s->avctx, AV_LOG_ERROR, "Slice type mismatch\n");
00538             return -1;
00539         }
00540     }
00541 
00542     av_dlog(avctx, "qscale=%d\n", s->qscale);
00543 
00544     /* default quantization values */
00545     if(s->codec_id== CODEC_ID_RV10){
00546         if(s->mb_y==0) s->first_slice_line=1;
00547     }else{
00548         s->first_slice_line=1;
00549         s->resync_mb_x= s->mb_x;
00550     }
00551     start_mb_x= s->mb_x;
00552     s->resync_mb_y= s->mb_y;
00553     if(s->h263_aic){
00554         s->y_dc_scale_table=
00555         s->c_dc_scale_table= ff_aic_dc_scale_table;
00556     }else{
00557         s->y_dc_scale_table=
00558         s->c_dc_scale_table= ff_mpeg1_dc_scale_table;
00559     }
00560 
00561     if(s->modified_quant)
00562         s->chroma_qscale_table= ff_h263_chroma_qscale_table;
00563 
00564     ff_set_qscale(s, s->qscale);
00565 
00566     s->rv10_first_dc_coded[0] = 0;
00567     s->rv10_first_dc_coded[1] = 0;
00568     s->rv10_first_dc_coded[2] = 0;
00569     s->block_wrap[0]=
00570     s->block_wrap[1]=
00571     s->block_wrap[2]=
00572     s->block_wrap[3]= s->b8_stride;
00573     s->block_wrap[4]=
00574     s->block_wrap[5]= s->mb_stride;
00575     ff_init_block_index(s);
00576     /* decode each macroblock */
00577 
00578     for(s->mb_num_left= mb_count; s->mb_num_left>0; s->mb_num_left--) {
00579         int ret;
00580         ff_update_block_index(s);
00581         av_dlog(avctx, "**mb x=%d y=%d\n", s->mb_x, s->mb_y);
00582 
00583         s->mv_dir = MV_DIR_FORWARD;
00584         s->mv_type = MV_TYPE_16X16;
00585         ret=ff_h263_decode_mb(s, s->block);
00586 
00587         if (ret != SLICE_ERROR && s->gb.size_in_bits < get_bits_count(&s->gb) && 8*buf_size2 >= get_bits_count(&s->gb)){
00588             av_log(avctx, AV_LOG_DEBUG, "update size from %d to %d\n", s->gb.size_in_bits, 8*buf_size2);
00589             s->gb.size_in_bits= 8*buf_size2;
00590             ret= SLICE_OK;
00591         }
00592 
00593         if (ret == SLICE_ERROR || s->gb.size_in_bits < get_bits_count(&s->gb)) {
00594             av_log(s->avctx, AV_LOG_ERROR, "ERROR at MB %d %d\n", s->mb_x, s->mb_y);
00595             return -1;
00596         }
00597         if(s->pict_type != AV_PICTURE_TYPE_B)
00598             ff_h263_update_motion_val(s);
00599         MPV_decode_mb(s, s->block);
00600         if(s->loop_filter)
00601             ff_h263_loop_filter(s);
00602 
00603         if (++s->mb_x == s->mb_width) {
00604             s->mb_x = 0;
00605             s->mb_y++;
00606             ff_init_block_index(s);
00607         }
00608         if(s->mb_x == s->resync_mb_x)
00609             s->first_slice_line=0;
00610         if(ret == SLICE_END) break;
00611     }
00612 
00613     ff_er_add_slice(s, start_mb_x, s->resync_mb_y, s->mb_x-1, s->mb_y, ER_MB_END);
00614 
00615     return s->gb.size_in_bits;
00616 }
00617 
00618 static int get_slice_offset(AVCodecContext *avctx, const uint8_t *buf, int n)
00619 {
00620     if(avctx->slice_count) return avctx->slice_offset[n];
00621     else                   return AV_RL32(buf + n*8);
00622 }
00623 
00624 static int rv10_decode_frame(AVCodecContext *avctx,
00625                              void *data, int *data_size,
00626                              AVPacket *avpkt)
00627 {
00628     const uint8_t *buf = avpkt->data;
00629     int buf_size = avpkt->size;
00630     MpegEncContext *s = avctx->priv_data;
00631     int i;
00632     AVFrame *pict = data;
00633     int slice_count;
00634     const uint8_t *slices_hdr = NULL;
00635 
00636     av_dlog(avctx, "*****frame %d size=%d\n", avctx->frame_number, buf_size);
00637 
00638     /* no supplementary picture */
00639     if (buf_size == 0) {
00640         return 0;
00641     }
00642 
00643     if(!avctx->slice_count){
00644         slice_count = (*buf++) + 1;
00645         buf_size--;
00646         slices_hdr = buf + 4;
00647         buf += 8 * slice_count;
00648         buf_size -= 8 * slice_count;
00649         if (buf_size <= 0)
00650             return AVERROR_INVALIDDATA;
00651     }else
00652         slice_count = avctx->slice_count;
00653 
00654     for(i=0; i<slice_count; i++){
00655         int offset= get_slice_offset(avctx, slices_hdr, i);
00656         int size, size2;
00657 
00658         if(i+1 == slice_count)
00659             size= buf_size - offset;
00660         else
00661             size= get_slice_offset(avctx, slices_hdr, i+1) - offset;
00662 
00663         if(i+2 >= slice_count)
00664             size2= buf_size - offset;
00665         else
00666             size2= get_slice_offset(avctx, slices_hdr, i+2) - offset;
00667 
00668         if(rv10_decode_packet(avctx, buf+offset, size, size2) > 8*size)
00669             i++;
00670     }
00671 
00672     if(s->current_picture_ptr != NULL && s->mb_y>=s->mb_height){
00673         ff_er_frame_end(s);
00674         MPV_frame_end(s);
00675 
00676         if (s->pict_type == AV_PICTURE_TYPE_B || s->low_delay) {
00677             *pict= *(AVFrame*)s->current_picture_ptr;
00678         } else if (s->last_picture_ptr != NULL) {
00679             *pict= *(AVFrame*)s->last_picture_ptr;
00680         }
00681 
00682         if(s->last_picture_ptr || s->low_delay){
00683             *data_size = sizeof(AVFrame);
00684             ff_print_debug_info(s, pict);
00685         }
00686         s->current_picture_ptr= NULL; //so we can detect if frame_end wasnt called (find some nicer solution...)
00687     }
00688 
00689     return avpkt->size;
00690 }
00691 
00692 AVCodec ff_rv10_decoder = {
00693     .name           = "rv10",
00694     .type           = AVMEDIA_TYPE_VIDEO,
00695     .id             = CODEC_ID_RV10,
00696     .priv_data_size = sizeof(MpegEncContext),
00697     .init           = rv10_decode_init,
00698     .close          = rv10_decode_end,
00699     .decode         = rv10_decode_frame,
00700     .capabilities   = CODEC_CAP_DR1,
00701     .max_lowres = 3,
00702     .long_name = NULL_IF_CONFIG_SMALL("RealVideo 1.0"),
00703     .pix_fmts= ff_pixfmt_list_420,
00704 };
00705 
00706 AVCodec ff_rv20_decoder = {
00707     .name           = "rv20",
00708     .type           = AVMEDIA_TYPE_VIDEO,
00709     .id             = CODEC_ID_RV20,
00710     .priv_data_size = sizeof(MpegEncContext),
00711     .init           = rv10_decode_init,
00712     .close          = rv10_decode_end,
00713     .decode         = rv10_decode_frame,
00714     .capabilities   = CODEC_CAP_DR1 | CODEC_CAP_DELAY,
00715     .flush= ff_mpeg_flush,
00716     .max_lowres = 3,
00717     .long_name = NULL_IF_CONFIG_SMALL("RealVideo 2.0"),
00718     .pix_fmts= ff_pixfmt_list_420,
00719 };
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