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