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             if (s->avctx->extradata_size < 8 + 2 * f) {
00345                 av_log(s->avctx, AV_LOG_ERROR, "Extradata too small.\n");
00346                 return AVERROR_INVALIDDATA;
00347             }
00348 
00349             new_w= 4*((uint8_t*)s->avctx->extradata)[6+2*f];
00350             new_h= 4*((uint8_t*)s->avctx->extradata)[7+2*f];
00351         }else{
00352             new_w= s->orig_width ;
00353             new_h= s->orig_height;
00354         }
00355         if(new_w != s->width || new_h != s->height){
00356             av_log(s->avctx, AV_LOG_DEBUG, "attempting to change resolution to %dx%d\n", new_w, new_h);
00357             if (av_image_check_size(new_w, new_h, 0, s->avctx) < 0)
00358                 return -1;
00359             MPV_common_end(s);
00360             avcodec_set_dimensions(s->avctx, new_w, new_h);
00361             s->width  = new_w;
00362             s->height = new_h;
00363             if (MPV_common_init(s) < 0)
00364                 return -1;
00365         }
00366 
00367         if(s->avctx->debug & FF_DEBUG_PICT_INFO){
00368             av_log(s->avctx, AV_LOG_DEBUG, "F %d/%d\n", f, rpr_bits);
00369         }
00370     } else if (av_image_check_size(s->width, s->height, 0, s->avctx) < 0)
00371         return AVERROR_INVALIDDATA;
00372 
00373     mb_pos = ff_h263_decode_mba(s);
00374 
00375 //av_log(s->avctx, AV_LOG_DEBUG, "%d\n", seq);
00376     seq |= s->time &~0x7FFF;
00377     if(seq - s->time >  0x4000) seq -= 0x8000;
00378     if(seq - s->time < -0x4000) seq += 0x8000;
00379     if(seq != s->time){
00380         if(s->pict_type!=AV_PICTURE_TYPE_B){
00381             s->time= seq;
00382             s->pp_time= s->time - s->last_non_b_time;
00383             s->last_non_b_time= s->time;
00384         }else{
00385             s->time= seq;
00386             s->pb_time= s->pp_time - (s->last_non_b_time - s->time);
00387             if(s->pp_time <=s->pb_time || s->pp_time <= s->pp_time - s->pb_time || s->pp_time<=0){
00388                 av_log(s->avctx, AV_LOG_DEBUG, "messed up order, possible from seeking? skipping current b frame\n");
00389                 return FRAME_SKIPPED;
00390             }
00391             ff_mpeg4_init_direct_mv(s);
00392         }
00393     }
00394 //    printf("%d %d %d %d %d\n", seq, (int)s->time, (int)s->last_non_b_time, s->pp_time, s->pb_time);
00395 /*for(i=0; i<32; i++){
00396     av_log(s->avctx, AV_LOG_DEBUG, "%d", get_bits1(&s->gb));
00397 }
00398 av_log(s->avctx, AV_LOG_DEBUG, "\n");*/
00399     s->no_rounding= get_bits1(&s->gb);
00400 
00401     if(RV_GET_MINOR_VER(s->avctx->sub_id) <= 1 && s->pict_type == AV_PICTURE_TYPE_B)
00402         skip_bits(&s->gb, 5); // binary decoder reads 3+2 bits here but they don't seem to be used
00403 
00404     s->f_code = 1;
00405     s->unrestricted_mv = 1;
00406     s->h263_aic= s->pict_type == AV_PICTURE_TYPE_I;
00407 //    s->alt_inter_vlc=1;
00408 //    s->obmc=1;
00409 //    s->umvplus=1;
00410     s->modified_quant=1;
00411     if(!s->avctx->lowres)
00412         s->loop_filter=1;
00413 
00414     if(s->avctx->debug & FF_DEBUG_PICT_INFO){
00415             av_log(s->avctx, AV_LOG_INFO, "num:%5d x:%2d y:%2d type:%d qscale:%2d rnd:%d\n",
00416                    seq, s->mb_x, s->mb_y, s->pict_type, s->qscale, s->no_rounding);
00417     }
00418 
00419     assert(s->pict_type != AV_PICTURE_TYPE_B || !s->low_delay);
00420 
00421     return s->mb_width*s->mb_height - mb_pos;
00422 }
00423 
00424 static av_cold int rv10_decode_init(AVCodecContext *avctx)
00425 {
00426     MpegEncContext *s = avctx->priv_data;
00427     static int done=0;
00428     int major_ver, minor_ver, micro_ver, ret;
00429 
00430     if (avctx->extradata_size < 8) {
00431         av_log(avctx, AV_LOG_ERROR, "Extradata is too small.\n");
00432         return -1;
00433     }
00434     if ((ret = av_image_check_size(avctx->coded_width,
00435                                    avctx->coded_height, 0, avctx)) < 0)
00436         return ret;
00437 
00438     MPV_decode_defaults(s);
00439 
00440     s->avctx= avctx;
00441     s->out_format = FMT_H263;
00442     s->codec_id= avctx->codec_id;
00443     avctx->flags |= CODEC_FLAG_EMU_EDGE;
00444 
00445     s->orig_width = s->width  = avctx->coded_width;
00446     s->orig_height= s->height = avctx->coded_height;
00447 
00448     s->h263_long_vectors= ((uint8_t*)avctx->extradata)[3] & 1;
00449     avctx->sub_id= AV_RB32((uint8_t*)avctx->extradata + 4);
00450 
00451     major_ver = RV_GET_MAJOR_VER(avctx->sub_id);
00452     minor_ver = RV_GET_MINOR_VER(avctx->sub_id);
00453     micro_ver = RV_GET_MICRO_VER(avctx->sub_id);
00454 
00455     s->low_delay = 1;
00456     switch (major_ver) {
00457     case 1:
00458         s->rv10_version = micro_ver ? 3 : 1;
00459         s->obmc = micro_ver == 2;
00460         break;
00461     case 2:
00462         if (minor_ver >= 2) {
00463             s->low_delay = 0;
00464             s->avctx->has_b_frames = 1;
00465         }
00466         break;
00467     default:
00468         av_log(s->avctx, AV_LOG_ERROR, "unknown header %X\n", avctx->sub_id);
00469         av_log_missing_feature(avctx, "RV1/2 version", 1);
00470         return AVERROR_PATCHWELCOME;
00471     }
00472 
00473     if(avctx->debug & FF_DEBUG_PICT_INFO){
00474         av_log(avctx, AV_LOG_DEBUG, "ver:%X ver0:%X\n", avctx->sub_id, avctx->extradata_size >= 4 ? ((uint32_t*)avctx->extradata)[0] : -1);
00475     }
00476 
00477     avctx->pix_fmt = PIX_FMT_YUV420P;
00478 
00479     if (MPV_common_init(s) < 0)
00480         return -1;
00481 
00482     ff_h263_decode_init_vlc(s);
00483 
00484     /* init rv vlc */
00485     if (!done) {
00486         INIT_VLC_STATIC(&rv_dc_lum, DC_VLC_BITS, 256,
00487                  rv_lum_bits, 1, 1,
00488                  rv_lum_code, 2, 2, 16384);
00489         INIT_VLC_STATIC(&rv_dc_chrom, DC_VLC_BITS, 256,
00490                  rv_chrom_bits, 1, 1,
00491                  rv_chrom_code, 2, 2, 16388);
00492         done = 1;
00493     }
00494 
00495     return 0;
00496 }
00497 
00498 static av_cold int rv10_decode_end(AVCodecContext *avctx)
00499 {
00500     MpegEncContext *s = avctx->priv_data;
00501 
00502     MPV_common_end(s);
00503     return 0;
00504 }
00505 
00506 static int rv10_decode_packet(AVCodecContext *avctx,
00507                              const uint8_t *buf, int buf_size, int buf_size2)
00508 {
00509     MpegEncContext *s = avctx->priv_data;
00510     int mb_count, mb_pos, left, start_mb_x, active_bits_size;
00511 
00512     active_bits_size = buf_size * 8;
00513     init_get_bits(&s->gb, buf, FFMAX(buf_size, buf_size2) * 8);
00514     if(s->codec_id ==CODEC_ID_RV10)
00515         mb_count = rv10_decode_picture_header(s);
00516     else
00517         mb_count = rv20_decode_picture_header(s);
00518     if (mb_count < 0) {
00519         av_log(s->avctx, AV_LOG_ERROR, "HEADER ERROR\n");
00520         return -1;
00521     }
00522 
00523     if (s->mb_x >= s->mb_width ||
00524         s->mb_y >= s->mb_height) {
00525         av_log(s->avctx, AV_LOG_ERROR, "POS ERROR %d %d\n", s->mb_x, s->mb_y);
00526         return -1;
00527     }
00528     mb_pos = s->mb_y * s->mb_width + s->mb_x;
00529     left = s->mb_width * s->mb_height - mb_pos;
00530     if (mb_count > left) {
00531         av_log(s->avctx, AV_LOG_ERROR, "COUNT ERROR\n");
00532         return -1;
00533     }
00534 
00535     if ((s->mb_x == 0 && s->mb_y == 0) || s->current_picture_ptr==NULL) {
00536         if(s->current_picture_ptr){ //FIXME write parser so we always have complete frames?
00537             ff_er_frame_end(s);
00538             MPV_frame_end(s);
00539             s->mb_x= s->mb_y = s->resync_mb_x = s->resync_mb_y= 0;
00540         }
00541         if(MPV_frame_start(s, avctx) < 0)
00542             return -1;
00543         ff_er_frame_start(s);
00544     } else {
00545         if (s->current_picture_ptr->f.pict_type != s->pict_type) {
00546             av_log(s->avctx, AV_LOG_ERROR, "Slice type mismatch\n");
00547             return -1;
00548         }
00549     }
00550 
00551     av_dlog(avctx, "qscale=%d\n", s->qscale);
00552 
00553     /* default quantization values */
00554     if(s->codec_id== CODEC_ID_RV10){
00555         if(s->mb_y==0) s->first_slice_line=1;
00556     }else{
00557         s->first_slice_line=1;
00558         s->resync_mb_x= s->mb_x;
00559     }
00560     start_mb_x= s->mb_x;
00561     s->resync_mb_y= s->mb_y;
00562     if(s->h263_aic){
00563         s->y_dc_scale_table=
00564         s->c_dc_scale_table= ff_aic_dc_scale_table;
00565     }else{
00566         s->y_dc_scale_table=
00567         s->c_dc_scale_table= ff_mpeg1_dc_scale_table;
00568     }
00569 
00570     if(s->modified_quant)
00571         s->chroma_qscale_table= ff_h263_chroma_qscale_table;
00572 
00573     ff_set_qscale(s, s->qscale);
00574 
00575     s->rv10_first_dc_coded[0] = 0;
00576     s->rv10_first_dc_coded[1] = 0;
00577     s->rv10_first_dc_coded[2] = 0;
00578     s->block_wrap[0]=
00579     s->block_wrap[1]=
00580     s->block_wrap[2]=
00581     s->block_wrap[3]= s->b8_stride;
00582     s->block_wrap[4]=
00583     s->block_wrap[5]= s->mb_stride;
00584     ff_init_block_index(s);
00585     /* decode each macroblock */
00586 
00587     for(s->mb_num_left= mb_count; s->mb_num_left>0; s->mb_num_left--) {
00588         int ret;
00589         ff_update_block_index(s);
00590         av_dlog(avctx, "**mb x=%d y=%d\n", s->mb_x, s->mb_y);
00591 
00592         s->mv_dir = MV_DIR_FORWARD;
00593         s->mv_type = MV_TYPE_16X16;
00594         ret=ff_h263_decode_mb(s, s->block);
00595 
00596         // Repeat the slice end check from ff_h263_decode_mb with our active
00597         // bitstream size
00598         if (ret != SLICE_ERROR) {
00599             int v = show_bits(&s->gb, 16);
00600 
00601             if (get_bits_count(&s->gb) + 16 > active_bits_size)
00602                 v >>= get_bits_count(&s->gb) + 16 - active_bits_size;
00603 
00604             if (!v)
00605                 ret = SLICE_END;
00606         }
00607         if (ret != SLICE_ERROR && active_bits_size < get_bits_count(&s->gb) &&
00608             8 * buf_size2 >= get_bits_count(&s->gb)) {
00609             active_bits_size = buf_size2 * 8;
00610             av_log(avctx, AV_LOG_DEBUG, "update size from %d to %d\n",
00611                    8 * buf_size, active_bits_size);
00612             ret= SLICE_OK;
00613         }
00614 
00615         if (ret == SLICE_ERROR || active_bits_size < get_bits_count(&s->gb)) {
00616             av_log(s->avctx, AV_LOG_ERROR, "ERROR at MB %d %d\n", s->mb_x, s->mb_y);
00617             return -1;
00618         }
00619         if(s->pict_type != AV_PICTURE_TYPE_B)
00620             ff_h263_update_motion_val(s);
00621         MPV_decode_mb(s, s->block);
00622         if(s->loop_filter)
00623             ff_h263_loop_filter(s);
00624 
00625         if (++s->mb_x == s->mb_width) {
00626             s->mb_x = 0;
00627             s->mb_y++;
00628             ff_init_block_index(s);
00629         }
00630         if(s->mb_x == s->resync_mb_x)
00631             s->first_slice_line=0;
00632         if(ret == SLICE_END) break;
00633     }
00634 
00635     ff_er_add_slice(s, start_mb_x, s->resync_mb_y, s->mb_x-1, s->mb_y, ER_MB_END);
00636 
00637     return active_bits_size;
00638 }
00639 
00640 static int get_slice_offset(AVCodecContext *avctx, const uint8_t *buf, int n)
00641 {
00642     if(avctx->slice_count) return avctx->slice_offset[n];
00643     else                   return AV_RL32(buf + n*8);
00644 }
00645 
00646 static int rv10_decode_frame(AVCodecContext *avctx,
00647                              void *data, int *data_size,
00648                              AVPacket *avpkt)
00649 {
00650     const uint8_t *buf = avpkt->data;
00651     int buf_size = avpkt->size;
00652     MpegEncContext *s = avctx->priv_data;
00653     int i;
00654     AVFrame *pict = data;
00655     int slice_count;
00656     const uint8_t *slices_hdr = NULL;
00657 
00658     av_dlog(avctx, "*****frame %d size=%d\n", avctx->frame_number, buf_size);
00659 
00660     /* no supplementary picture */
00661     if (buf_size == 0) {
00662         return 0;
00663     }
00664 
00665     if(!avctx->slice_count){
00666         slice_count = (*buf++) + 1;
00667         buf_size--;
00668         slices_hdr = buf + 4;
00669         buf += 8 * slice_count;
00670         buf_size -= 8 * slice_count;
00671         if (buf_size <= 0)
00672             return AVERROR_INVALIDDATA;
00673     }else
00674         slice_count = avctx->slice_count;
00675 
00676     for(i=0; i<slice_count; i++){
00677         int offset= get_slice_offset(avctx, slices_hdr, i);
00678         int size, size2;
00679 
00680         if(i+1 == slice_count)
00681             size= buf_size - offset;
00682         else
00683             size= get_slice_offset(avctx, slices_hdr, i+1) - offset;
00684 
00685         if(i+2 >= slice_count)
00686             size2= buf_size - offset;
00687         else
00688             size2= get_slice_offset(avctx, slices_hdr, i+2) - offset;
00689 
00690         if(rv10_decode_packet(avctx, buf+offset, size, size2) > 8*size)
00691             i++;
00692     }
00693 
00694     if(s->current_picture_ptr != NULL && s->mb_y>=s->mb_height){
00695         ff_er_frame_end(s);
00696         MPV_frame_end(s);
00697 
00698         if (s->pict_type == AV_PICTURE_TYPE_B || s->low_delay) {
00699             *pict= *(AVFrame*)s->current_picture_ptr;
00700         } else if (s->last_picture_ptr != NULL) {
00701             *pict= *(AVFrame*)s->last_picture_ptr;
00702         }
00703 
00704         if(s->last_picture_ptr || s->low_delay){
00705             *data_size = sizeof(AVFrame);
00706             ff_print_debug_info(s, pict);
00707         }
00708         s->current_picture_ptr= NULL; //so we can detect if frame_end wasnt called (find some nicer solution...)
00709     }
00710 
00711     return avpkt->size;
00712 }
00713 
00714 AVCodec ff_rv10_decoder = {
00715     .name           = "rv10",
00716     .type           = AVMEDIA_TYPE_VIDEO,
00717     .id             = CODEC_ID_RV10,
00718     .priv_data_size = sizeof(MpegEncContext),
00719     .init           = rv10_decode_init,
00720     .close          = rv10_decode_end,
00721     .decode         = rv10_decode_frame,
00722     .capabilities   = CODEC_CAP_DR1,
00723     .max_lowres = 3,
00724     .long_name = NULL_IF_CONFIG_SMALL("RealVideo 1.0"),
00725     .pix_fmts= ff_pixfmt_list_420,
00726 };
00727 
00728 AVCodec ff_rv20_decoder = {
00729     .name           = "rv20",
00730     .type           = AVMEDIA_TYPE_VIDEO,
00731     .id             = CODEC_ID_RV20,
00732     .priv_data_size = sizeof(MpegEncContext),
00733     .init           = rv10_decode_init,
00734     .close          = rv10_decode_end,
00735     .decode         = rv10_decode_frame,
00736     .capabilities   = CODEC_CAP_DR1 | CODEC_CAP_DELAY,
00737     .flush= ff_mpeg_flush,
00738     .max_lowres = 3,
00739     .long_name = NULL_IF_CONFIG_SMALL("RealVideo 2.0"),
00740     .pix_fmts= ff_pixfmt_list_420,
00741 };