FFmpeg: libavcodec/rv10.c Source File

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 FFmpeg.
00007  *
00008  * FFmpeg 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  * FFmpeg 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 FFmpeg; 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 #if 0
00302     GetBitContext gb= s->gb;
00303     for(i=0; i<64; i++){
00304         av_log(s->avctx, AV_LOG_DEBUG, "%d", get_bits1(&gb));
00305         if(i%4==3) av_log(s->avctx, AV_LOG_DEBUG, " ");
00306     }
00307     av_log(s->avctx, AV_LOG_DEBUG, "\n");
00308 #endif
00309 #if 0
00310     av_log(s->avctx, AV_LOG_DEBUG, "%3dx%03d/%02Xx%02X ", s->width, s->height, s->width/4, s->height/4);
00311     for(i=0; i<s->avctx->extradata_size; i++){
00312         av_log(s->avctx, AV_LOG_DEBUG, "%02X ", ((uint8_t*)s->avctx->extradata)[i]);
00313         if(i%4==3) av_log(s->avctx, AV_LOG_DEBUG, " ");
00314     }
00315     av_log(s->avctx, AV_LOG_DEBUG, "\n");
00316 #endif
00317 
00318     i= get_bits(&s->gb, 2);
00319     switch(i){
00320     case 0: s->pict_type= AV_PICTURE_TYPE_I; break;
00321     case 1: s->pict_type= AV_PICTURE_TYPE_I; break; //hmm ...
00322     case 2: s->pict_type= AV_PICTURE_TYPE_P; break;
00323     case 3: s->pict_type= AV_PICTURE_TYPE_B; break;
00324     default:
00325         av_log(s->avctx, AV_LOG_ERROR, "unknown frame type\n");
00326         return -1;
00327     }
00328 
00329     if(s->last_picture_ptr==NULL && s->pict_type==AV_PICTURE_TYPE_B){
00330         av_log(s->avctx, AV_LOG_ERROR, "early B pix\n");
00331         return -1;
00332     }
00333 
00334     if (get_bits1(&s->gb)){
00335         av_log(s->avctx, AV_LOG_ERROR, "reserved bit set\n");
00336         return -1;
00337     }
00338 
00339     s->qscale = get_bits(&s->gb, 5);
00340     if(s->qscale==0){
00341         av_log(s->avctx, AV_LOG_ERROR, "error, qscale:0\n");
00342         return -1;
00343     }
00344 
00345     if(RV_GET_MINOR_VER(s->avctx->sub_id) >= 2)
00346         s->loop_filter = get_bits1(&s->gb);
00347 
00348     if(RV_GET_MINOR_VER(s->avctx->sub_id) <= 1)
00349         seq = get_bits(&s->gb, 8) << 7;
00350     else
00351         seq = get_bits(&s->gb, 13) << 2;
00352 
00353     rpr_bits = s->avctx->extradata[1] & 7;
00354     if(rpr_bits){
00355         int f, new_w, new_h;
00356         rpr_bits = FFMIN((rpr_bits >> 1) + 1, 3);
00357 
00358         f = get_bits(&s->gb, rpr_bits);
00359 
00360         if(f){
00361             new_w= 4*((uint8_t*)s->avctx->extradata)[6+2*f];
00362             new_h= 4*((uint8_t*)s->avctx->extradata)[7+2*f];
00363         }else{
00364             new_w= s->orig_width ;
00365             new_h= s->orig_height;
00366         }
00367         if(new_w != s->width || new_h != s->height){
00368             av_log(s->avctx, AV_LOG_DEBUG, "attempting to change resolution to %dx%d\n", new_w, new_h);
00369             if (av_image_check_size(new_w, new_h, 0, s->avctx) < 0)
00370                 return -1;
00371             MPV_common_end(s);
00372             avcodec_set_dimensions(s->avctx, new_w, new_h);
00373             s->width  = new_w;
00374             s->height = new_h;
00375             if (MPV_common_init(s) < 0)
00376                 return -1;
00377         }
00378 
00379         if(s->avctx->debug & FF_DEBUG_PICT_INFO){
00380             av_log(s->avctx, AV_LOG_DEBUG, "F %d/%d\n", f, rpr_bits);
00381         }
00382     }
00383 
00384     mb_pos = ff_h263_decode_mba(s);
00385 
00386 //av_log(s->avctx, AV_LOG_DEBUG, "%d\n", seq);
00387     seq |= s->time &~0x7FFF;
00388     if(seq - s->time >  0x4000) seq -= 0x8000;
00389     if(seq - s->time < -0x4000) seq += 0x8000;
00390     if(seq != s->time){
00391         if(s->pict_type!=AV_PICTURE_TYPE_B){
00392             s->time= seq;
00393             s->pp_time= s->time - s->last_non_b_time;
00394             s->last_non_b_time= s->time;
00395         }else{
00396             s->time= seq;
00397             s->pb_time= s->pp_time - (s->last_non_b_time - s->time);
00398             if(s->pp_time <=s->pb_time || s->pp_time <= s->pp_time - s->pb_time || s->pp_time<=0){
00399                 av_log(s->avctx, AV_LOG_DEBUG, "messed up order, possible from seeking? skipping current b frame\n");
00400                 return FRAME_SKIPPED;
00401             }
00402             ff_mpeg4_init_direct_mv(s);
00403         }
00404     }
00405 //    printf("%d %d %d %d %d\n", seq, (int)s->time, (int)s->last_non_b_time, s->pp_time, s->pb_time);
00406 /*for(i=0; i<32; i++){
00407     av_log(s->avctx, AV_LOG_DEBUG, "%d", get_bits1(&s->gb));
00408 }
00409 av_log(s->avctx, AV_LOG_DEBUG, "\n");*/
00410     s->no_rounding= get_bits1(&s->gb);
00411 
00412     if(RV_GET_MINOR_VER(s->avctx->sub_id) <= 1 && s->pict_type == AV_PICTURE_TYPE_B)
00413         skip_bits(&s->gb, 5); // binary decoder reads 3+2 bits here but they don't seem to be used
00414 
00415     s->f_code = 1;
00416     s->unrestricted_mv = 1;
00417     s->h263_aic= s->pict_type == AV_PICTURE_TYPE_I;
00418 //    s->alt_inter_vlc=1;
00419 //    s->obmc=1;
00420 //    s->umvplus=1;
00421     s->modified_quant=1;
00422     if(!s->avctx->lowres)
00423         s->loop_filter=1;
00424 
00425     if(s->avctx->debug & FF_DEBUG_PICT_INFO){
00426             av_log(s->avctx, AV_LOG_INFO, "num:%5d x:%2d y:%2d type:%d qscale:%2d rnd:%d\n",
00427                    seq, s->mb_x, s->mb_y, s->pict_type, s->qscale, s->no_rounding);
00428     }
00429 
00430     assert(s->pict_type != AV_PICTURE_TYPE_B || !s->low_delay);
00431 
00432     return s->mb_width*s->mb_height - mb_pos;
00433 }
00434 
00435 static av_cold int rv10_decode_init(AVCodecContext *avctx)
00436 {
00437     MpegEncContext *s = avctx->priv_data;
00438     static int done=0;
00439     int major_ver, minor_ver, micro_ver;
00440 
00441     if (avctx->extradata_size < 8) {
00442         av_log(avctx, AV_LOG_ERROR, "Extradata is too small.\n");
00443         return -1;
00444     }
00445 
00446     MPV_decode_defaults(s);
00447 
00448     s->avctx= avctx;
00449     s->out_format = FMT_H263;
00450     s->codec_id= avctx->codec_id;
00451 
00452     s->orig_width = s->width  = avctx->coded_width;
00453     s->orig_height= s->height = avctx->coded_height;
00454 
00455     s->h263_long_vectors= ((uint8_t*)avctx->extradata)[3] & 1;
00456     avctx->sub_id= AV_RB32((uint8_t*)avctx->extradata + 4);
00457 
00458     major_ver = RV_GET_MAJOR_VER(avctx->sub_id);
00459     minor_ver = RV_GET_MINOR_VER(avctx->sub_id);
00460     micro_ver = RV_GET_MICRO_VER(avctx->sub_id);
00461 
00462     s->low_delay = 1;
00463     switch (major_ver) {
00464     case 1:
00465         s->rv10_version = micro_ver ? 3 : 1;
00466         s->obmc = micro_ver == 2;
00467         break;
00468     case 2:
00469         if (minor_ver >= 2) {
00470             s->low_delay = 0;
00471             s->avctx->has_b_frames = 1;
00472         }
00473         break;
00474     default:
00475         av_log(s->avctx, AV_LOG_ERROR, "unknown header %X\n", avctx->sub_id);
00476         av_log_missing_feature(avctx, "RV1/2 version", 1);
00477         return AVERROR_PATCHWELCOME;
00478     }
00479 
00480     if(avctx->debug & FF_DEBUG_PICT_INFO){
00481         av_log(avctx, AV_LOG_DEBUG, "ver:%X ver0:%X\n", avctx->sub_id, avctx->extradata_size >= 4 ? ((uint32_t*)avctx->extradata)[0] : -1);
00482     }
00483 
00484     avctx->pix_fmt = PIX_FMT_YUV420P;
00485 
00486     if (MPV_common_init(s) < 0)
00487         return -1;
00488 
00489     h263_decode_init_vlc(s);
00490 
00491     /* init rv vlc */
00492     if (!done) {
00493         INIT_VLC_STATIC(&rv_dc_lum, DC_VLC_BITS, 256,
00494                  rv_lum_bits, 1, 1,
00495                  rv_lum_code, 2, 2, 16384);
00496         INIT_VLC_STATIC(&rv_dc_chrom, DC_VLC_BITS, 256,
00497                  rv_chrom_bits, 1, 1,
00498                  rv_chrom_code, 2, 2, 16388);
00499         done = 1;
00500     }
00501 
00502     return 0;
00503 }
00504 
00505 static av_cold int rv10_decode_end(AVCodecContext *avctx)
00506 {
00507     MpegEncContext *s = avctx->priv_data;
00508 
00509     MPV_common_end(s);
00510     return 0;
00511 }
00512 
00513 static int rv10_decode_packet(AVCodecContext *avctx,
00514                              const uint8_t *buf, int buf_size, int buf_size2)
00515 {
00516     MpegEncContext *s = avctx->priv_data;
00517     int mb_count, mb_pos, left, start_mb_x;
00518 
00519     init_get_bits(&s->gb, buf, buf_size*8);
00520     if(s->codec_id ==CODEC_ID_RV10)
00521         mb_count = rv10_decode_picture_header(s);
00522     else
00523         mb_count = rv20_decode_picture_header(s);
00524     if (mb_count < 0) {
00525         av_log(s->avctx, AV_LOG_ERROR, "HEADER ERROR\n");
00526         return -1;
00527     }
00528 
00529     if (s->mb_x >= s->mb_width ||
00530         s->mb_y >= s->mb_height) {
00531         av_log(s->avctx, AV_LOG_ERROR, "POS ERROR %d %d\n", s->mb_x, s->mb_y);
00532         return -1;
00533     }
00534     mb_pos = s->mb_y * s->mb_width + s->mb_x;
00535     left = s->mb_width * s->mb_height - mb_pos;
00536     if (mb_count > left) {
00537         av_log(s->avctx, AV_LOG_ERROR, "COUNT ERROR\n");
00538         return -1;
00539     }
00540 
00541     if ((s->mb_x == 0 && s->mb_y == 0) || s->current_picture_ptr==NULL) {
00542         if(s->current_picture_ptr){ //FIXME write parser so we always have complete frames?
00543             ff_er_frame_end(s);
00544             MPV_frame_end(s);
00545             s->mb_x= s->mb_y = s->resync_mb_x = s->resync_mb_y= 0;
00546         }
00547         if(MPV_frame_start(s, avctx) < 0)
00548             return -1;
00549         ff_er_frame_start(s);
00550     } else {
00551         if (s->current_picture_ptr->f.pict_type != s->pict_type) {
00552             av_log(s->avctx, AV_LOG_ERROR, "Slice type mismatch\n");
00553             return -1;
00554         }
00555     }
00556 
00557 
00558     av_dlog(avctx, "qscale=%d\n", s->qscale);
00559 
00560     /* default quantization values */
00561     if(s->codec_id== CODEC_ID_RV10){
00562         if(s->mb_y==0) s->first_slice_line=1;
00563     }else{
00564         s->first_slice_line=1;
00565         s->resync_mb_x= s->mb_x;
00566     }
00567     start_mb_x= s->mb_x;
00568     s->resync_mb_y= s->mb_y;
00569     if(s->h263_aic){
00570         s->y_dc_scale_table=
00571         s->c_dc_scale_table= ff_aic_dc_scale_table;
00572     }else{
00573         s->y_dc_scale_table=
00574         s->c_dc_scale_table= ff_mpeg1_dc_scale_table;
00575     }
00576 
00577     if(s->modified_quant)
00578         s->chroma_qscale_table= ff_h263_chroma_qscale_table;
00579 
00580     ff_set_qscale(s, s->qscale);
00581 
00582     s->rv10_first_dc_coded[0] = 0;
00583     s->rv10_first_dc_coded[1] = 0;
00584     s->rv10_first_dc_coded[2] = 0;
00585     s->block_wrap[0]=
00586     s->block_wrap[1]=
00587     s->block_wrap[2]=
00588     s->block_wrap[3]= s->b8_stride;
00589     s->block_wrap[4]=
00590     s->block_wrap[5]= s->mb_stride;
00591     ff_init_block_index(s);
00592     /* decode each macroblock */
00593 
00594     for(s->mb_num_left= mb_count; s->mb_num_left>0; s->mb_num_left--) {
00595         int ret;
00596         ff_update_block_index(s);
00597         av_dlog(avctx, "**mb x=%d y=%d\n", s->mb_x, s->mb_y);
00598 
00599         s->mv_dir = MV_DIR_FORWARD;
00600         s->mv_type = MV_TYPE_16X16;
00601         ret=ff_h263_decode_mb(s, s->block);
00602 
00603         if (ret != SLICE_ERROR && s->gb.size_in_bits < get_bits_count(&s->gb) && 8*buf_size2 >= get_bits_count(&s->gb)){
00604             av_log(avctx, AV_LOG_DEBUG, "update size from %d to %d\n", s->gb.size_in_bits, 8*buf_size2);
00605             s->gb.size_in_bits= 8*buf_size2;
00606             ret= SLICE_OK;
00607         }
00608 
00609         if (ret == SLICE_ERROR || s->gb.size_in_bits < get_bits_count(&s->gb)) {
00610             av_log(s->avctx, AV_LOG_ERROR, "ERROR at MB %d %d\n", s->mb_x, s->mb_y);
00611             return -1;
00612         }
00613         if(s->pict_type != AV_PICTURE_TYPE_B)
00614             ff_h263_update_motion_val(s);
00615         MPV_decode_mb(s, s->block);
00616         if(s->loop_filter)
00617             ff_h263_loop_filter(s);
00618 
00619         if (++s->mb_x == s->mb_width) {
00620             s->mb_x = 0;
00621             s->mb_y++;
00622             ff_init_block_index(s);
00623         }
00624         if(s->mb_x == s->resync_mb_x)
00625             s->first_slice_line=0;
00626         if(ret == SLICE_END) break;
00627     }
00628 
00629     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);
00630 
00631     return s->gb.size_in_bits;
00632 }
00633 
00634 static int get_slice_offset(AVCodecContext *avctx, const uint8_t *buf, int n)
00635 {
00636     if(avctx->slice_count) return avctx->slice_offset[n];
00637     else                   return AV_RL32(buf + n*8);
00638 }
00639 
00640 static int rv10_decode_frame(AVCodecContext *avctx,
00641                              void *data, int *data_size,
00642                              AVPacket *avpkt)
00643 {
00644     const uint8_t *buf = avpkt->data;
00645     int buf_size = avpkt->size;
00646     MpegEncContext *s = avctx->priv_data;
00647     int i;
00648     AVFrame *pict = data;
00649     int slice_count;
00650     const uint8_t *slices_hdr = NULL;
00651 
00652     av_dlog(avctx, "*****frame %d size=%d\n", avctx->frame_number, buf_size);
00653     s->flags  = avctx->flags;
00654     s->flags2 = avctx->flags2;
00655 
00656     /* no supplementary picture */
00657     if (buf_size == 0) {
00658         return 0;
00659     }
00660 
00661     if(!avctx->slice_count){
00662         slice_count = (*buf++) + 1;
00663         slices_hdr = buf + 4;
00664         buf += 8 * slice_count;
00665     }else
00666         slice_count = avctx->slice_count;
00667 
00668     for(i=0; i<slice_count; i++){
00669         int offset= get_slice_offset(avctx, slices_hdr, i);
00670         int size, size2;
00671 
00672         if(i+1 == slice_count)
00673             size= buf_size - offset;
00674         else
00675             size= get_slice_offset(avctx, slices_hdr, i+1) - offset;
00676 
00677         if(i+2 >= slice_count)
00678             size2= buf_size - offset;
00679         else
00680             size2= get_slice_offset(avctx, slices_hdr, i+2) - offset;
00681 
00682         if(rv10_decode_packet(avctx, buf+offset, size, size2) > 8*size)
00683             i++;
00684     }
00685 
00686     if(s->current_picture_ptr != NULL && s->mb_y>=s->mb_height){
00687         ff_er_frame_end(s);
00688         MPV_frame_end(s);
00689 
00690         if (s->pict_type == AV_PICTURE_TYPE_B || s->low_delay) {
00691             *pict= *(AVFrame*)s->current_picture_ptr;
00692         } else if (s->last_picture_ptr != NULL) {
00693             *pict= *(AVFrame*)s->last_picture_ptr;
00694         }
00695 
00696         if(s->last_picture_ptr || s->low_delay){
00697             *data_size = sizeof(AVFrame);
00698             ff_print_debug_info(s, pict);
00699         }
00700         s->current_picture_ptr= NULL; //so we can detect if frame_end wasnt called (find some nicer solution...)
00701     }
00702 
00703     return buf_size;
00704 }
00705 
00706 AVCodec ff_rv10_decoder = {
00707     .name           = "rv10",
00708     .type           = AVMEDIA_TYPE_VIDEO,
00709     .id             = CODEC_ID_RV10,
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,
00715     .max_lowres = 3,
00716     .long_name = NULL_IF_CONFIG_SMALL("RealVideo 1.0"),
00717     .pix_fmts= ff_pixfmt_list_420,
00718 };
00719 
00720 AVCodec ff_rv20_decoder = {
00721     .name           = "rv20",
00722     .type           = AVMEDIA_TYPE_VIDEO,
00723     .id             = CODEC_ID_RV20,
00724     .priv_data_size = sizeof(MpegEncContext),
00725     .init           = rv10_decode_init,
00726     .close          = rv10_decode_end,
00727     .decode         = rv10_decode_frame,
00728     .capabilities   = CODEC_CAP_DR1 | CODEC_CAP_DELAY,
00729     .flush= ff_mpeg_flush,
00730     .max_lowres = 3,
00731     .long_name = NULL_IF_CONFIG_SMALL("RealVideo 2.0"),
00732     .pix_fmts= ff_pixfmt_list_420,
00733 };