3 * Copyright (c) 2000,2001 Fabrice Bellard
4 * Copyright (c) 2002-2004 Michael Niedermayer
6 * This file is part of FFmpeg.
8 * FFmpeg is free software; you can redistribute it and/or
9 * modify it under the terms of the GNU Lesser General Public
10 * License as published by the Free Software Foundation; either
11 * version 2.1 of the License, or (at your option) any later version.
13 * FFmpeg is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16 * Lesser General Public License for more details.
18 * You should have received a copy of the GNU Lesser General Public
19 * License along with FFmpeg; if not, write to the Free Software
20 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
28 #include "libavutil/imgutils.h"
31 #include "mpegvideo.h"
32 #include "mpeg4video.h"
37 #define RV_GET_MAJOR_VER(x) ((x) >> 28)
38 #define RV_GET_MINOR_VER(x) (((x) >> 20) & 0xFF)
39 #define RV_GET_MICRO_VER(x) (((x) >> 12) & 0xFF)
41 #define DC_VLC_BITS 14 //FIXME find a better solution
43 typedef struct RVDecContext {
48 static const uint16_t rv_lum_code[256] =
50 0x3e7f, 0x0f00, 0x0f01, 0x0f02, 0x0f03, 0x0f04, 0x0f05, 0x0f06,
51 0x0f07, 0x0f08, 0x0f09, 0x0f0a, 0x0f0b, 0x0f0c, 0x0f0d, 0x0f0e,
52 0x0f0f, 0x0f10, 0x0f11, 0x0f12, 0x0f13, 0x0f14, 0x0f15, 0x0f16,
53 0x0f17, 0x0f18, 0x0f19, 0x0f1a, 0x0f1b, 0x0f1c, 0x0f1d, 0x0f1e,
54 0x0f1f, 0x0f20, 0x0f21, 0x0f22, 0x0f23, 0x0f24, 0x0f25, 0x0f26,
55 0x0f27, 0x0f28, 0x0f29, 0x0f2a, 0x0f2b, 0x0f2c, 0x0f2d, 0x0f2e,
56 0x0f2f, 0x0f30, 0x0f31, 0x0f32, 0x0f33, 0x0f34, 0x0f35, 0x0f36,
57 0x0f37, 0x0f38, 0x0f39, 0x0f3a, 0x0f3b, 0x0f3c, 0x0f3d, 0x0f3e,
58 0x0f3f, 0x0380, 0x0381, 0x0382, 0x0383, 0x0384, 0x0385, 0x0386,
59 0x0387, 0x0388, 0x0389, 0x038a, 0x038b, 0x038c, 0x038d, 0x038e,
60 0x038f, 0x0390, 0x0391, 0x0392, 0x0393, 0x0394, 0x0395, 0x0396,
61 0x0397, 0x0398, 0x0399, 0x039a, 0x039b, 0x039c, 0x039d, 0x039e,
62 0x039f, 0x00c0, 0x00c1, 0x00c2, 0x00c3, 0x00c4, 0x00c5, 0x00c6,
63 0x00c7, 0x00c8, 0x00c9, 0x00ca, 0x00cb, 0x00cc, 0x00cd, 0x00ce,
64 0x00cf, 0x0050, 0x0051, 0x0052, 0x0053, 0x0054, 0x0055, 0x0056,
65 0x0057, 0x0020, 0x0021, 0x0022, 0x0023, 0x000c, 0x000d, 0x0004,
66 0x0000, 0x0005, 0x000e, 0x000f, 0x0024, 0x0025, 0x0026, 0x0027,
67 0x0058, 0x0059, 0x005a, 0x005b, 0x005c, 0x005d, 0x005e, 0x005f,
68 0x00d0, 0x00d1, 0x00d2, 0x00d3, 0x00d4, 0x00d5, 0x00d6, 0x00d7,
69 0x00d8, 0x00d9, 0x00da, 0x00db, 0x00dc, 0x00dd, 0x00de, 0x00df,
70 0x03a0, 0x03a1, 0x03a2, 0x03a3, 0x03a4, 0x03a5, 0x03a6, 0x03a7,
71 0x03a8, 0x03a9, 0x03aa, 0x03ab, 0x03ac, 0x03ad, 0x03ae, 0x03af,
72 0x03b0, 0x03b1, 0x03b2, 0x03b3, 0x03b4, 0x03b5, 0x03b6, 0x03b7,
73 0x03b8, 0x03b9, 0x03ba, 0x03bb, 0x03bc, 0x03bd, 0x03be, 0x03bf,
74 0x0f40, 0x0f41, 0x0f42, 0x0f43, 0x0f44, 0x0f45, 0x0f46, 0x0f47,
75 0x0f48, 0x0f49, 0x0f4a, 0x0f4b, 0x0f4c, 0x0f4d, 0x0f4e, 0x0f4f,
76 0x0f50, 0x0f51, 0x0f52, 0x0f53, 0x0f54, 0x0f55, 0x0f56, 0x0f57,
77 0x0f58, 0x0f59, 0x0f5a, 0x0f5b, 0x0f5c, 0x0f5d, 0x0f5e, 0x0f5f,
78 0x0f60, 0x0f61, 0x0f62, 0x0f63, 0x0f64, 0x0f65, 0x0f66, 0x0f67,
79 0x0f68, 0x0f69, 0x0f6a, 0x0f6b, 0x0f6c, 0x0f6d, 0x0f6e, 0x0f6f,
80 0x0f70, 0x0f71, 0x0f72, 0x0f73, 0x0f74, 0x0f75, 0x0f76, 0x0f77,
81 0x0f78, 0x0f79, 0x0f7a, 0x0f7b, 0x0f7c, 0x0f7d, 0x0f7e, 0x0f7f,
84 static const uint8_t rv_lum_bits[256] =
86 14, 12, 12, 12, 12, 12, 12, 12,
87 12, 12, 12, 12, 12, 12, 12, 12,
88 12, 12, 12, 12, 12, 12, 12, 12,
89 12, 12, 12, 12, 12, 12, 12, 12,
90 12, 12, 12, 12, 12, 12, 12, 12,
91 12, 12, 12, 12, 12, 12, 12, 12,
92 12, 12, 12, 12, 12, 12, 12, 12,
93 12, 12, 12, 12, 12, 12, 12, 12,
94 12, 10, 10, 10, 10, 10, 10, 10,
95 10, 10, 10, 10, 10, 10, 10, 10,
96 10, 10, 10, 10, 10, 10, 10, 10,
97 10, 10, 10, 10, 10, 10, 10, 10,
98 10, 8, 8, 8, 8, 8, 8, 8,
99 8, 8, 8, 8, 8, 8, 8, 8,
100 8, 7, 7, 7, 7, 7, 7, 7,
101 7, 6, 6, 6, 6, 5, 5, 4,
102 2, 4, 5, 5, 6, 6, 6, 6,
103 7, 7, 7, 7, 7, 7, 7, 7,
104 8, 8, 8, 8, 8, 8, 8, 8,
105 8, 8, 8, 8, 8, 8, 8, 8,
106 10, 10, 10, 10, 10, 10, 10, 10,
107 10, 10, 10, 10, 10, 10, 10, 10,
108 10, 10, 10, 10, 10, 10, 10, 10,
109 10, 10, 10, 10, 10, 10, 10, 10,
110 12, 12, 12, 12, 12, 12, 12, 12,
111 12, 12, 12, 12, 12, 12, 12, 12,
112 12, 12, 12, 12, 12, 12, 12, 12,
113 12, 12, 12, 12, 12, 12, 12, 12,
114 12, 12, 12, 12, 12, 12, 12, 12,
115 12, 12, 12, 12, 12, 12, 12, 12,
116 12, 12, 12, 12, 12, 12, 12, 12,
117 12, 12, 12, 12, 12, 12, 12, 12,
120 static const uint16_t rv_chrom_code[256] =
122 0xfe7f, 0x3f00, 0x3f01, 0x3f02, 0x3f03, 0x3f04, 0x3f05, 0x3f06,
123 0x3f07, 0x3f08, 0x3f09, 0x3f0a, 0x3f0b, 0x3f0c, 0x3f0d, 0x3f0e,
124 0x3f0f, 0x3f10, 0x3f11, 0x3f12, 0x3f13, 0x3f14, 0x3f15, 0x3f16,
125 0x3f17, 0x3f18, 0x3f19, 0x3f1a, 0x3f1b, 0x3f1c, 0x3f1d, 0x3f1e,
126 0x3f1f, 0x3f20, 0x3f21, 0x3f22, 0x3f23, 0x3f24, 0x3f25, 0x3f26,
127 0x3f27, 0x3f28, 0x3f29, 0x3f2a, 0x3f2b, 0x3f2c, 0x3f2d, 0x3f2e,
128 0x3f2f, 0x3f30, 0x3f31, 0x3f32, 0x3f33, 0x3f34, 0x3f35, 0x3f36,
129 0x3f37, 0x3f38, 0x3f39, 0x3f3a, 0x3f3b, 0x3f3c, 0x3f3d, 0x3f3e,
130 0x3f3f, 0x0f80, 0x0f81, 0x0f82, 0x0f83, 0x0f84, 0x0f85, 0x0f86,
131 0x0f87, 0x0f88, 0x0f89, 0x0f8a, 0x0f8b, 0x0f8c, 0x0f8d, 0x0f8e,
132 0x0f8f, 0x0f90, 0x0f91, 0x0f92, 0x0f93, 0x0f94, 0x0f95, 0x0f96,
133 0x0f97, 0x0f98, 0x0f99, 0x0f9a, 0x0f9b, 0x0f9c, 0x0f9d, 0x0f9e,
134 0x0f9f, 0x03c0, 0x03c1, 0x03c2, 0x03c3, 0x03c4, 0x03c5, 0x03c6,
135 0x03c7, 0x03c8, 0x03c9, 0x03ca, 0x03cb, 0x03cc, 0x03cd, 0x03ce,
136 0x03cf, 0x00e0, 0x00e1, 0x00e2, 0x00e3, 0x00e4, 0x00e5, 0x00e6,
137 0x00e7, 0x0030, 0x0031, 0x0032, 0x0033, 0x0008, 0x0009, 0x0002,
138 0x0000, 0x0003, 0x000a, 0x000b, 0x0034, 0x0035, 0x0036, 0x0037,
139 0x00e8, 0x00e9, 0x00ea, 0x00eb, 0x00ec, 0x00ed, 0x00ee, 0x00ef,
140 0x03d0, 0x03d1, 0x03d2, 0x03d3, 0x03d4, 0x03d5, 0x03d6, 0x03d7,
141 0x03d8, 0x03d9, 0x03da, 0x03db, 0x03dc, 0x03dd, 0x03de, 0x03df,
142 0x0fa0, 0x0fa1, 0x0fa2, 0x0fa3, 0x0fa4, 0x0fa5, 0x0fa6, 0x0fa7,
143 0x0fa8, 0x0fa9, 0x0faa, 0x0fab, 0x0fac, 0x0fad, 0x0fae, 0x0faf,
144 0x0fb0, 0x0fb1, 0x0fb2, 0x0fb3, 0x0fb4, 0x0fb5, 0x0fb6, 0x0fb7,
145 0x0fb8, 0x0fb9, 0x0fba, 0x0fbb, 0x0fbc, 0x0fbd, 0x0fbe, 0x0fbf,
146 0x3f40, 0x3f41, 0x3f42, 0x3f43, 0x3f44, 0x3f45, 0x3f46, 0x3f47,
147 0x3f48, 0x3f49, 0x3f4a, 0x3f4b, 0x3f4c, 0x3f4d, 0x3f4e, 0x3f4f,
148 0x3f50, 0x3f51, 0x3f52, 0x3f53, 0x3f54, 0x3f55, 0x3f56, 0x3f57,
149 0x3f58, 0x3f59, 0x3f5a, 0x3f5b, 0x3f5c, 0x3f5d, 0x3f5e, 0x3f5f,
150 0x3f60, 0x3f61, 0x3f62, 0x3f63, 0x3f64, 0x3f65, 0x3f66, 0x3f67,
151 0x3f68, 0x3f69, 0x3f6a, 0x3f6b, 0x3f6c, 0x3f6d, 0x3f6e, 0x3f6f,
152 0x3f70, 0x3f71, 0x3f72, 0x3f73, 0x3f74, 0x3f75, 0x3f76, 0x3f77,
153 0x3f78, 0x3f79, 0x3f7a, 0x3f7b, 0x3f7c, 0x3f7d, 0x3f7e, 0x3f7f,
156 static const uint8_t rv_chrom_bits[256] =
158 16, 14, 14, 14, 14, 14, 14, 14,
159 14, 14, 14, 14, 14, 14, 14, 14,
160 14, 14, 14, 14, 14, 14, 14, 14,
161 14, 14, 14, 14, 14, 14, 14, 14,
162 14, 14, 14, 14, 14, 14, 14, 14,
163 14, 14, 14, 14, 14, 14, 14, 14,
164 14, 14, 14, 14, 14, 14, 14, 14,
165 14, 14, 14, 14, 14, 14, 14, 14,
166 14, 12, 12, 12, 12, 12, 12, 12,
167 12, 12, 12, 12, 12, 12, 12, 12,
168 12, 12, 12, 12, 12, 12, 12, 12,
169 12, 12, 12, 12, 12, 12, 12, 12,
170 12, 10, 10, 10, 10, 10, 10, 10,
171 10, 10, 10, 10, 10, 10, 10, 10,
172 10, 8, 8, 8, 8, 8, 8, 8,
173 8, 6, 6, 6, 6, 4, 4, 3,
174 2, 3, 4, 4, 6, 6, 6, 6,
175 8, 8, 8, 8, 8, 8, 8, 8,
176 10, 10, 10, 10, 10, 10, 10, 10,
177 10, 10, 10, 10, 10, 10, 10, 10,
178 12, 12, 12, 12, 12, 12, 12, 12,
179 12, 12, 12, 12, 12, 12, 12, 12,
180 12, 12, 12, 12, 12, 12, 12, 12,
181 12, 12, 12, 12, 12, 12, 12, 12,
182 14, 14, 14, 14, 14, 14, 14, 14,
183 14, 14, 14, 14, 14, 14, 14, 14,
184 14, 14, 14, 14, 14, 14, 14, 14,
185 14, 14, 14, 14, 14, 14, 14, 14,
186 14, 14, 14, 14, 14, 14, 14, 14,
187 14, 14, 14, 14, 14, 14, 14, 14,
188 14, 14, 14, 14, 14, 14, 14, 14,
189 14, 14, 14, 14, 14, 14, 14, 14,
192 static VLC rv_dc_lum, rv_dc_chrom;
194 int ff_rv_decode_dc(MpegEncContext *s, int n)
199 code = get_vlc2(&s->gb, rv_dc_lum.table, DC_VLC_BITS, 2);
201 /* XXX: I don't understand why they use LONGER codes than
202 necessary. The following code would be completely useless
203 if they had thought about it !!! */
204 code = get_bits(&s->gb, 7);
206 code = (int8_t)(get_bits(&s->gb, 7) + 1);
207 } else if (code == 0x7d) {
208 code = -128 + get_bits(&s->gb, 7);
209 } else if (code == 0x7e) {
210 if (get_bits1(&s->gb) == 0)
211 code = (int8_t)(get_bits(&s->gb, 8) + 1);
213 code = (int8_t)(get_bits(&s->gb, 8));
214 } else if (code == 0x7f) {
215 skip_bits(&s->gb, 11);
222 code = get_vlc2(&s->gb, rv_dc_chrom.table, DC_VLC_BITS, 2);
225 code = get_bits(&s->gb, 9);
227 code = (int8_t)(get_bits(&s->gb, 7) + 1);
228 } else if (code == 0x1fd) {
229 code = -128 + get_bits(&s->gb, 7);
230 } else if (code == 0x1fe) {
231 skip_bits(&s->gb, 9);
234 av_log(s->avctx, AV_LOG_ERROR, "chroma dc error\n");
244 /* read RV 1.0 compatible frame header */
245 static int rv10_decode_picture_header(MpegEncContext *s)
247 int mb_count, pb_frame, marker, mb_xy;
249 marker = get_bits1(&s->gb);
251 if (get_bits1(&s->gb))
252 s->pict_type = AV_PICTURE_TYPE_P;
254 s->pict_type = AV_PICTURE_TYPE_I;
255 if(!marker) av_log(s->avctx, AV_LOG_ERROR, "marker missing\n");
256 pb_frame = get_bits1(&s->gb);
258 av_dlog(s->avctx, "pict_type=%d pb_frame=%d\n", s->pict_type, pb_frame);
261 av_log(s->avctx, AV_LOG_ERROR, "pb frame not supported\n");
265 s->qscale = get_bits(&s->gb, 5);
267 av_log(s->avctx, AV_LOG_ERROR, "error, qscale:0\n");
271 if (s->pict_type == AV_PICTURE_TYPE_I) {
272 if (s->rv10_version == 3) {
273 /* specific MPEG like DC coding not used */
274 s->last_dc[0] = get_bits(&s->gb, 8);
275 s->last_dc[1] = get_bits(&s->gb, 8);
276 s->last_dc[2] = get_bits(&s->gb, 8);
277 av_dlog(s->avctx, "DC:%d %d %d\n", s->last_dc[0],
278 s->last_dc[1], s->last_dc[2]);
281 /* if multiple packets per frame are sent, the position at which
282 to display the macroblocks is coded here */
284 mb_xy= s->mb_x + s->mb_y*s->mb_width;
285 if(show_bits(&s->gb, 12)==0 || (mb_xy && mb_xy < s->mb_num)){
286 s->mb_x = get_bits(&s->gb, 6); /* mb_x */
287 s->mb_y = get_bits(&s->gb, 6); /* mb_y */
288 mb_count = get_bits(&s->gb, 12);
292 mb_count = s->mb_width * s->mb_height;
294 skip_bits(&s->gb, 3); /* ignored */
296 s->unrestricted_mv = 1;
301 static int rv20_decode_picture_header(RVDecContext *rv)
303 MpegEncContext *s = &rv->m;
308 GetBitContext gb= s->gb;
310 av_log(s->avctx, AV_LOG_DEBUG, "%d", get_bits1(&gb));
311 if(i%4==3) av_log(s->avctx, AV_LOG_DEBUG, " ");
313 av_log(s->avctx, AV_LOG_DEBUG, "\n");
316 av_log(s->avctx, AV_LOG_DEBUG, "%3dx%03d/%02Xx%02X ", s->width, s->height, s->width/4, s->height/4);
317 for(i=0; i<s->avctx->extradata_size; i++){
318 av_log(s->avctx, AV_LOG_DEBUG, "%02X ", ((uint8_t*)s->avctx->extradata)[i]);
319 if(i%4==3) av_log(s->avctx, AV_LOG_DEBUG, " ");
321 av_log(s->avctx, AV_LOG_DEBUG, "\n");
324 i= get_bits(&s->gb, 2);
326 case 0: s->pict_type= AV_PICTURE_TYPE_I; break;
327 case 1: s->pict_type= AV_PICTURE_TYPE_I; break; //hmm ...
328 case 2: s->pict_type= AV_PICTURE_TYPE_P; break;
329 case 3: s->pict_type= AV_PICTURE_TYPE_B; break;
331 av_log(s->avctx, AV_LOG_ERROR, "unknown frame type\n");
335 if(s->last_picture_ptr==NULL && s->pict_type==AV_PICTURE_TYPE_B){
336 av_log(s->avctx, AV_LOG_ERROR, "early B pix\n");
340 if (get_bits1(&s->gb)){
341 av_log(s->avctx, AV_LOG_ERROR, "reserved bit set\n");
345 s->qscale = get_bits(&s->gb, 5);
347 av_log(s->avctx, AV_LOG_ERROR, "error, qscale:0\n");
351 if(RV_GET_MINOR_VER(rv->sub_id) >= 2)
352 s->loop_filter = get_bits1(&s->gb);
354 if(RV_GET_MINOR_VER(rv->sub_id) <= 1)
355 seq = get_bits(&s->gb, 8) << 7;
357 seq = get_bits(&s->gb, 13) << 2;
359 rpr_bits = s->avctx->extradata[1] & 7;
362 rpr_bits = FFMIN((rpr_bits >> 1) + 1, 3);
364 f = get_bits(&s->gb, rpr_bits);
367 new_w= 4*((uint8_t*)s->avctx->extradata)[6+2*f];
368 new_h= 4*((uint8_t*)s->avctx->extradata)[7+2*f];
370 new_w= s->orig_width ;
371 new_h= s->orig_height;
373 if(new_w != s->width || new_h != s->height){
374 av_log(s->avctx, AV_LOG_DEBUG, "attempting to change resolution to %dx%d\n", new_w, new_h);
375 if (av_image_check_size(new_w, new_h, 0, s->avctx) < 0)
377 ff_MPV_common_end(s);
378 avcodec_set_dimensions(s->avctx, new_w, new_h);
381 if (ff_MPV_common_init(s) < 0)
385 if(s->avctx->debug & FF_DEBUG_PICT_INFO){
386 av_log(s->avctx, AV_LOG_DEBUG, "F %d/%d\n", f, rpr_bits);
388 } else if (av_image_check_size(s->width, s->height, 0, s->avctx) < 0)
389 return AVERROR_INVALIDDATA;
391 mb_pos = ff_h263_decode_mba(s);
393 //av_log(s->avctx, AV_LOG_DEBUG, "%d\n", seq);
394 seq |= s->time &~0x7FFF;
395 if(seq - s->time > 0x4000) seq -= 0x8000;
396 if(seq - s->time < -0x4000) seq += 0x8000;
398 if(s->pict_type!=AV_PICTURE_TYPE_B){
400 s->pp_time= s->time - s->last_non_b_time;
401 s->last_non_b_time= s->time;
404 s->pb_time= s->pp_time - (s->last_non_b_time - s->time);
405 if(s->pp_time <=s->pb_time || s->pp_time <= s->pp_time - s->pb_time || s->pp_time<=0){
406 av_log(s->avctx, AV_LOG_DEBUG, "messed up order, possible from seeking? skipping current b frame\n");
407 return FRAME_SKIPPED;
409 ff_mpeg4_init_direct_mv(s);
412 // printf("%d %d %d %d %d\n", seq, (int)s->time, (int)s->last_non_b_time, s->pp_time, s->pb_time);
413 /*for(i=0; i<32; i++){
414 av_log(s->avctx, AV_LOG_DEBUG, "%d", get_bits1(&s->gb));
416 av_log(s->avctx, AV_LOG_DEBUG, "\n");*/
417 s->no_rounding= get_bits1(&s->gb);
419 if(RV_GET_MINOR_VER(rv->sub_id) <= 1 && s->pict_type == AV_PICTURE_TYPE_B)
420 skip_bits(&s->gb, 5); // binary decoder reads 3+2 bits here but they don't seem to be used
423 s->unrestricted_mv = 1;
424 s->h263_aic= s->pict_type == AV_PICTURE_TYPE_I;
425 // s->alt_inter_vlc=1;
429 if(!s->avctx->lowres)
432 if(s->avctx->debug & FF_DEBUG_PICT_INFO){
433 av_log(s->avctx, AV_LOG_INFO, "num:%5d x:%2d y:%2d type:%d qscale:%2d rnd:%d\n",
434 seq, s->mb_x, s->mb_y, s->pict_type, s->qscale, s->no_rounding);
437 assert(s->pict_type != AV_PICTURE_TYPE_B || !s->low_delay);
439 return s->mb_width*s->mb_height - mb_pos;
442 static av_cold int rv10_decode_init(AVCodecContext *avctx)
444 RVDecContext *rv = avctx->priv_data;
445 MpegEncContext *s = &rv->m;
447 int major_ver, minor_ver, micro_ver;
449 if (avctx->extradata_size < 8) {
450 av_log(avctx, AV_LOG_ERROR, "Extradata is too small.\n");
454 ff_MPV_decode_defaults(s);
457 s->out_format = FMT_H263;
458 s->codec_id= avctx->codec_id;
460 s->orig_width = s->width = avctx->coded_width;
461 s->orig_height= s->height = avctx->coded_height;
463 s->h263_long_vectors= ((uint8_t*)avctx->extradata)[3] & 1;
464 rv->sub_id = AV_RB32((uint8_t*)avctx->extradata + 4);
466 major_ver = RV_GET_MAJOR_VER(rv->sub_id);
467 minor_ver = RV_GET_MINOR_VER(rv->sub_id);
468 micro_ver = RV_GET_MICRO_VER(rv->sub_id);
473 s->rv10_version = micro_ver ? 3 : 1;
474 s->obmc = micro_ver == 2;
477 if (minor_ver >= 2) {
479 s->avctx->has_b_frames = 1;
483 av_log(s->avctx, AV_LOG_ERROR, "unknown header %X\n", rv->sub_id);
484 av_log_missing_feature(avctx, "RV1/2 version", 1);
485 return AVERROR_PATCHWELCOME;
488 if(avctx->debug & FF_DEBUG_PICT_INFO){
489 av_log(avctx, AV_LOG_DEBUG, "ver:%X ver0:%X\n", rv->sub_id, avctx->extradata_size >= 4 ? ((uint32_t*)avctx->extradata)[0] : -1);
492 avctx->pix_fmt = PIX_FMT_YUV420P;
494 if (ff_MPV_common_init(s) < 0)
497 ff_h263_decode_init_vlc(s);
501 INIT_VLC_STATIC(&rv_dc_lum, DC_VLC_BITS, 256,
503 rv_lum_code, 2, 2, 16384);
504 INIT_VLC_STATIC(&rv_dc_chrom, DC_VLC_BITS, 256,
506 rv_chrom_code, 2, 2, 16388);
513 static av_cold int rv10_decode_end(AVCodecContext *avctx)
515 MpegEncContext *s = avctx->priv_data;
517 ff_MPV_common_end(s);
521 static int rv10_decode_packet(AVCodecContext *avctx,
522 const uint8_t *buf, int buf_size, int buf_size2)
524 RVDecContext *rv = avctx->priv_data;
525 MpegEncContext *s = &rv->m;
526 int mb_count, mb_pos, left, start_mb_x, active_bits_size;
528 active_bits_size = buf_size * 8;
529 init_get_bits(&s->gb, buf, FFMAX(buf_size, buf_size2) * 8);
530 if(s->codec_id ==CODEC_ID_RV10)
531 mb_count = rv10_decode_picture_header(s);
533 mb_count = rv20_decode_picture_header(rv);
535 av_log(s->avctx, AV_LOG_ERROR, "HEADER ERROR\n");
539 if (s->mb_x >= s->mb_width ||
540 s->mb_y >= s->mb_height) {
541 av_log(s->avctx, AV_LOG_ERROR, "POS ERROR %d %d\n", s->mb_x, s->mb_y);
544 mb_pos = s->mb_y * s->mb_width + s->mb_x;
545 left = s->mb_width * s->mb_height - mb_pos;
546 if (mb_count > left) {
547 av_log(s->avctx, AV_LOG_ERROR, "COUNT ERROR\n");
551 if ((s->mb_x == 0 && s->mb_y == 0) || s->current_picture_ptr==NULL) {
552 if(s->current_picture_ptr){ //FIXME write parser so we always have complete frames?
555 s->mb_x= s->mb_y = s->resync_mb_x = s->resync_mb_y= 0;
557 if(ff_MPV_frame_start(s, avctx) < 0)
559 ff_er_frame_start(s);
561 if (s->current_picture_ptr->f.pict_type != s->pict_type) {
562 av_log(s->avctx, AV_LOG_ERROR, "Slice type mismatch\n");
568 av_dlog(avctx, "qscale=%d\n", s->qscale);
570 /* default quantization values */
571 if(s->codec_id== CODEC_ID_RV10){
572 if(s->mb_y==0) s->first_slice_line=1;
574 s->first_slice_line=1;
575 s->resync_mb_x= s->mb_x;
578 s->resync_mb_y= s->mb_y;
581 s->c_dc_scale_table= ff_aic_dc_scale_table;
584 s->c_dc_scale_table= ff_mpeg1_dc_scale_table;
587 if(s->modified_quant)
588 s->chroma_qscale_table= ff_h263_chroma_qscale_table;
590 ff_set_qscale(s, s->qscale);
592 s->rv10_first_dc_coded[0] = 0;
593 s->rv10_first_dc_coded[1] = 0;
594 s->rv10_first_dc_coded[2] = 0;
598 s->block_wrap[3]= s->b8_stride;
600 s->block_wrap[5]= s->mb_stride;
601 ff_init_block_index(s);
602 /* decode each macroblock */
604 for(s->mb_num_left= mb_count; s->mb_num_left>0; s->mb_num_left--) {
606 ff_update_block_index(s);
607 av_dlog(avctx, "**mb x=%d y=%d\n", s->mb_x, s->mb_y);
609 s->mv_dir = MV_DIR_FORWARD;
610 s->mv_type = MV_TYPE_16X16;
611 ret=ff_h263_decode_mb(s, s->block);
613 // Repeat the slice end check from ff_h263_decode_mb with our active
615 if (ret != SLICE_ERROR) {
616 int v = show_bits(&s->gb, 16);
618 if (get_bits_count(&s->gb) + 16 > active_bits_size)
619 v >>= get_bits_count(&s->gb) + 16 - active_bits_size;
624 if (ret != SLICE_ERROR && active_bits_size < get_bits_count(&s->gb) &&
625 8 * buf_size2 >= get_bits_count(&s->gb)) {
626 active_bits_size = buf_size2 * 8;
627 av_log(avctx, AV_LOG_DEBUG, "update size from %d to %d\n",
628 8 * buf_size, active_bits_size);
632 if (ret == SLICE_ERROR || active_bits_size < get_bits_count(&s->gb)) {
633 av_log(s->avctx, AV_LOG_ERROR, "ERROR at MB %d %d\n", s->mb_x, s->mb_y);
636 if(s->pict_type != AV_PICTURE_TYPE_B)
637 ff_h263_update_motion_val(s);
638 ff_MPV_decode_mb(s, s->block);
640 ff_h263_loop_filter(s);
642 if (++s->mb_x == s->mb_width) {
645 ff_init_block_index(s);
647 if(s->mb_x == s->resync_mb_x)
648 s->first_slice_line=0;
649 if(ret == SLICE_END) break;
652 ff_er_add_slice(s, start_mb_x, s->resync_mb_y, s->mb_x-1, s->mb_y, ER_MB_END);
654 return active_bits_size;
657 static int get_slice_offset(AVCodecContext *avctx, const uint8_t *buf, int n)
659 if(avctx->slice_count) return avctx->slice_offset[n];
660 else return AV_RL32(buf + n*8);
663 static int rv10_decode_frame(AVCodecContext *avctx,
664 void *data, int *data_size,
667 const uint8_t *buf = avpkt->data;
668 int buf_size = avpkt->size;
669 MpegEncContext *s = avctx->priv_data;
671 AVFrame *pict = data;
673 const uint8_t *slices_hdr = NULL;
675 av_dlog(avctx, "*****frame %d size=%d\n", avctx->frame_number, buf_size);
676 s->flags = avctx->flags;
677 s->flags2 = avctx->flags2;
679 /* no supplementary picture */
684 if(!avctx->slice_count){
685 slice_count = (*buf++) + 1;
687 slices_hdr = buf + 4;
688 buf += 8 * slice_count;
689 buf_size -= 8 * slice_count;
691 return AVERROR_INVALIDDATA;
693 slice_count = avctx->slice_count;
695 for(i=0; i<slice_count; i++){
696 unsigned offset = get_slice_offset(avctx, slices_hdr, i);
699 if (offset >= buf_size)
700 return AVERROR_INVALIDDATA;
702 if(i+1 == slice_count)
703 size= buf_size - offset;
705 size= get_slice_offset(avctx, slices_hdr, i+1) - offset;
707 if(i+2 >= slice_count)
708 size2= buf_size - offset;
710 size2= get_slice_offset(avctx, slices_hdr, i+2) - offset;
712 if (size <= 0 || size2 <= 0 ||
713 offset + FFMAX(size, size2) > buf_size)
714 return AVERROR_INVALIDDATA;
716 if(rv10_decode_packet(avctx, buf+offset, size, size2) > 8*size)
720 if(s->current_picture_ptr != NULL && s->mb_y>=s->mb_height){
724 if (s->pict_type == AV_PICTURE_TYPE_B || s->low_delay) {
725 *pict = s->current_picture_ptr->f;
726 } else if (s->last_picture_ptr != NULL) {
727 *pict = s->last_picture_ptr->f;
730 if(s->last_picture_ptr || s->low_delay){
731 *data_size = sizeof(AVFrame);
732 ff_print_debug_info(s, pict);
734 s->current_picture_ptr= NULL; //so we can detect if frame_end wasnt called (find some nicer solution...)
740 AVCodec ff_rv10_decoder = {
742 .type = AVMEDIA_TYPE_VIDEO,
744 .priv_data_size = sizeof(RVDecContext),
745 .init = rv10_decode_init,
746 .close = rv10_decode_end,
747 .decode = rv10_decode_frame,
748 .capabilities = CODEC_CAP_DR1,
750 .long_name = NULL_IF_CONFIG_SMALL("RealVideo 1.0"),
751 .pix_fmts= ff_pixfmt_list_420,
754 AVCodec ff_rv20_decoder = {
756 .type = AVMEDIA_TYPE_VIDEO,
758 .priv_data_size = sizeof(RVDecContext),
759 .init = rv10_decode_init,
760 .close = rv10_decode_end,
761 .decode = rv10_decode_frame,
762 .capabilities = CODEC_CAP_DR1 | CODEC_CAP_DELAY,
763 .flush= ff_mpeg_flush,
765 .long_name = NULL_IF_CONFIG_SMALL("RealVideo 2.0"),
766 .pix_fmts= ff_pixfmt_list_420,