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 AVRational old_aspect = s->avctx->sample_aspect_ratio;
375 av_log(s->avctx, AV_LOG_DEBUG, "attempting to change resolution to %dx%d\n", new_w, new_h);
376 if (av_image_check_size(new_w, new_h, 0, s->avctx) < 0)
378 ff_MPV_common_end(s);
380 // attempt to keep aspect during typical resolution switches
382 old_aspect = (AVRational){1, 1};
383 if (2 * new_w * s->height == new_h * s->width)
384 s->avctx->sample_aspect_ratio = av_mul_q(old_aspect, (AVRational){2, 1});
385 if (new_w * s->height == 2 * new_h * s->width)
386 s->avctx->sample_aspect_ratio = av_mul_q(old_aspect, (AVRational){1, 2});
387 avcodec_set_dimensions(s->avctx, new_w, new_h);
390 if (ff_MPV_common_init(s) < 0)
394 if(s->avctx->debug & FF_DEBUG_PICT_INFO){
395 av_log(s->avctx, AV_LOG_DEBUG, "F %d/%d\n", f, rpr_bits);
397 } else if (av_image_check_size(s->width, s->height, 0, s->avctx) < 0)
398 return AVERROR_INVALIDDATA;
400 mb_pos = ff_h263_decode_mba(s);
402 //av_log(s->avctx, AV_LOG_DEBUG, "%d\n", seq);
403 seq |= s->time &~0x7FFF;
404 if(seq - s->time > 0x4000) seq -= 0x8000;
405 if(seq - s->time < -0x4000) seq += 0x8000;
407 if(s->pict_type!=AV_PICTURE_TYPE_B){
409 s->pp_time= s->time - s->last_non_b_time;
410 s->last_non_b_time= s->time;
413 s->pb_time= s->pp_time - (s->last_non_b_time - s->time);
414 if(s->pp_time <=s->pb_time || s->pp_time <= s->pp_time - s->pb_time || s->pp_time<=0){
415 av_log(s->avctx, AV_LOG_DEBUG, "messed up order, possible from seeking? skipping current b frame\n");
416 return FRAME_SKIPPED;
418 ff_mpeg4_init_direct_mv(s);
421 // printf("%d %d %d %d %d\n", seq, (int)s->time, (int)s->last_non_b_time, s->pp_time, s->pb_time);
422 /*for(i=0; i<32; i++){
423 av_log(s->avctx, AV_LOG_DEBUG, "%d", get_bits1(&s->gb));
425 av_log(s->avctx, AV_LOG_DEBUG, "\n");*/
426 s->no_rounding= get_bits1(&s->gb);
428 if(RV_GET_MINOR_VER(rv->sub_id) <= 1 && s->pict_type == AV_PICTURE_TYPE_B)
429 skip_bits(&s->gb, 5); // binary decoder reads 3+2 bits here but they don't seem to be used
432 s->unrestricted_mv = 1;
433 s->h263_aic= s->pict_type == AV_PICTURE_TYPE_I;
434 // s->alt_inter_vlc=1;
440 if(s->avctx->debug & FF_DEBUG_PICT_INFO){
441 av_log(s->avctx, AV_LOG_INFO, "num:%5d x:%2d y:%2d type:%d qscale:%2d rnd:%d\n",
442 seq, s->mb_x, s->mb_y, s->pict_type, s->qscale, s->no_rounding);
445 assert(s->pict_type != AV_PICTURE_TYPE_B || !s->low_delay);
447 return s->mb_width*s->mb_height - mb_pos;
450 static av_cold int rv10_decode_init(AVCodecContext *avctx)
452 RVDecContext *rv = avctx->priv_data;
453 MpegEncContext *s = &rv->m;
455 int major_ver, minor_ver, micro_ver;
457 if (avctx->extradata_size < 8) {
458 av_log(avctx, AV_LOG_ERROR, "Extradata is too small.\n");
462 ff_MPV_decode_defaults(s);
465 s->out_format = FMT_H263;
466 s->codec_id= avctx->codec_id;
468 s->orig_width = s->width = avctx->coded_width;
469 s->orig_height= s->height = avctx->coded_height;
471 s->h263_long_vectors= ((uint8_t*)avctx->extradata)[3] & 1;
472 rv->sub_id = AV_RB32((uint8_t*)avctx->extradata + 4);
474 major_ver = RV_GET_MAJOR_VER(rv->sub_id);
475 minor_ver = RV_GET_MINOR_VER(rv->sub_id);
476 micro_ver = RV_GET_MICRO_VER(rv->sub_id);
481 s->rv10_version = micro_ver ? 3 : 1;
482 s->obmc = micro_ver == 2;
485 if (minor_ver >= 2) {
487 s->avctx->has_b_frames = 1;
491 av_log(s->avctx, AV_LOG_ERROR, "unknown header %X\n", rv->sub_id);
492 av_log_missing_feature(avctx, "RV1/2 version", 1);
493 return AVERROR_PATCHWELCOME;
496 if(avctx->debug & FF_DEBUG_PICT_INFO){
497 av_log(avctx, AV_LOG_DEBUG, "ver:%X ver0:%X\n", rv->sub_id, avctx->extradata_size >= 4 ? ((uint32_t*)avctx->extradata)[0] : -1);
500 avctx->pix_fmt = PIX_FMT_YUV420P;
502 if (ff_MPV_common_init(s) < 0)
505 ff_h263_decode_init_vlc(s);
509 INIT_VLC_STATIC(&rv_dc_lum, DC_VLC_BITS, 256,
511 rv_lum_code, 2, 2, 16384);
512 INIT_VLC_STATIC(&rv_dc_chrom, DC_VLC_BITS, 256,
514 rv_chrom_code, 2, 2, 16388);
521 static av_cold int rv10_decode_end(AVCodecContext *avctx)
523 MpegEncContext *s = avctx->priv_data;
525 ff_MPV_common_end(s);
529 static int rv10_decode_packet(AVCodecContext *avctx,
530 const uint8_t *buf, int buf_size, int buf_size2)
532 RVDecContext *rv = avctx->priv_data;
533 MpegEncContext *s = &rv->m;
534 int mb_count, mb_pos, left, start_mb_x, active_bits_size;
536 active_bits_size = buf_size * 8;
537 init_get_bits(&s->gb, buf, FFMAX(buf_size, buf_size2) * 8);
538 if(s->codec_id ==CODEC_ID_RV10)
539 mb_count = rv10_decode_picture_header(s);
541 mb_count = rv20_decode_picture_header(rv);
543 av_log(s->avctx, AV_LOG_ERROR, "HEADER ERROR\n");
547 if (s->mb_x >= s->mb_width ||
548 s->mb_y >= s->mb_height) {
549 av_log(s->avctx, AV_LOG_ERROR, "POS ERROR %d %d\n", s->mb_x, s->mb_y);
552 mb_pos = s->mb_y * s->mb_width + s->mb_x;
553 left = s->mb_width * s->mb_height - mb_pos;
554 if (mb_count > left) {
555 av_log(s->avctx, AV_LOG_ERROR, "COUNT ERROR\n");
559 if ((s->mb_x == 0 && s->mb_y == 0) || s->current_picture_ptr==NULL) {
560 if(s->current_picture_ptr){ //FIXME write parser so we always have complete frames?
563 s->mb_x= s->mb_y = s->resync_mb_x = s->resync_mb_y= 0;
565 if(ff_MPV_frame_start(s, avctx) < 0)
567 ff_er_frame_start(s);
569 if (s->current_picture_ptr->f.pict_type != s->pict_type) {
570 av_log(s->avctx, AV_LOG_ERROR, "Slice type mismatch\n");
576 av_dlog(avctx, "qscale=%d\n", s->qscale);
578 /* default quantization values */
579 if(s->codec_id== CODEC_ID_RV10){
580 if(s->mb_y==0) s->first_slice_line=1;
582 s->first_slice_line=1;
583 s->resync_mb_x= s->mb_x;
586 s->resync_mb_y= s->mb_y;
589 s->c_dc_scale_table= ff_aic_dc_scale_table;
592 s->c_dc_scale_table= ff_mpeg1_dc_scale_table;
595 if(s->modified_quant)
596 s->chroma_qscale_table= ff_h263_chroma_qscale_table;
598 ff_set_qscale(s, s->qscale);
600 s->rv10_first_dc_coded[0] = 0;
601 s->rv10_first_dc_coded[1] = 0;
602 s->rv10_first_dc_coded[2] = 0;
606 s->block_wrap[3]= s->b8_stride;
608 s->block_wrap[5]= s->mb_stride;
609 ff_init_block_index(s);
610 /* decode each macroblock */
612 for(s->mb_num_left= mb_count; s->mb_num_left>0; s->mb_num_left--) {
614 ff_update_block_index(s);
615 av_dlog(avctx, "**mb x=%d y=%d\n", s->mb_x, s->mb_y);
617 s->mv_dir = MV_DIR_FORWARD;
618 s->mv_type = MV_TYPE_16X16;
619 ret=ff_h263_decode_mb(s, s->block);
621 // Repeat the slice end check from ff_h263_decode_mb with our active
623 if (ret != SLICE_ERROR) {
624 int v = show_bits(&s->gb, 16);
626 if (get_bits_count(&s->gb) + 16 > active_bits_size)
627 v >>= get_bits_count(&s->gb) + 16 - active_bits_size;
632 if (ret != SLICE_ERROR && active_bits_size < get_bits_count(&s->gb) &&
633 8 * buf_size2 >= get_bits_count(&s->gb)) {
634 active_bits_size = buf_size2 * 8;
635 av_log(avctx, AV_LOG_DEBUG, "update size from %d to %d\n",
636 8 * buf_size, active_bits_size);
640 if (ret == SLICE_ERROR || active_bits_size < get_bits_count(&s->gb)) {
641 av_log(s->avctx, AV_LOG_ERROR, "ERROR at MB %d %d\n", s->mb_x, s->mb_y);
644 if(s->pict_type != AV_PICTURE_TYPE_B)
645 ff_h263_update_motion_val(s);
646 ff_MPV_decode_mb(s, s->block);
648 ff_h263_loop_filter(s);
650 if (++s->mb_x == s->mb_width) {
653 ff_init_block_index(s);
655 if(s->mb_x == s->resync_mb_x)
656 s->first_slice_line=0;
657 if(ret == SLICE_END) break;
660 ff_er_add_slice(s, start_mb_x, s->resync_mb_y, s->mb_x-1, s->mb_y, ER_MB_END);
662 return active_bits_size;
665 static int get_slice_offset(AVCodecContext *avctx, const uint8_t *buf, int n)
667 if(avctx->slice_count) return avctx->slice_offset[n];
668 else return AV_RL32(buf + n*8);
671 static int rv10_decode_frame(AVCodecContext *avctx,
672 void *data, int *data_size,
675 const uint8_t *buf = avpkt->data;
676 int buf_size = avpkt->size;
677 MpegEncContext *s = avctx->priv_data;
679 AVFrame *pict = data;
681 const uint8_t *slices_hdr = NULL;
683 av_dlog(avctx, "*****frame %d size=%d\n", avctx->frame_number, buf_size);
684 s->flags = avctx->flags;
685 s->flags2 = avctx->flags2;
687 /* no supplementary picture */
692 if(!avctx->slice_count){
693 slice_count = (*buf++) + 1;
695 slices_hdr = buf + 4;
696 buf += 8 * slice_count;
697 buf_size -= 8 * slice_count;
699 return AVERROR_INVALIDDATA;
701 slice_count = avctx->slice_count;
703 for(i=0; i<slice_count; i++){
704 unsigned offset = get_slice_offset(avctx, slices_hdr, i);
707 if (offset >= buf_size)
708 return AVERROR_INVALIDDATA;
710 if(i+1 == slice_count)
711 size= buf_size - offset;
713 size= get_slice_offset(avctx, slices_hdr, i+1) - offset;
715 if(i+2 >= slice_count)
716 size2= buf_size - offset;
718 size2= get_slice_offset(avctx, slices_hdr, i+2) - offset;
720 if (size <= 0 || size2 <= 0 ||
721 offset + FFMAX(size, size2) > buf_size)
722 return AVERROR_INVALIDDATA;
724 if(rv10_decode_packet(avctx, buf+offset, size, size2) > 8*size)
728 if(s->current_picture_ptr != NULL && s->mb_y>=s->mb_height){
732 if (s->pict_type == AV_PICTURE_TYPE_B || s->low_delay) {
733 *pict = s->current_picture_ptr->f;
734 } else if (s->last_picture_ptr != NULL) {
735 *pict = s->last_picture_ptr->f;
738 if(s->last_picture_ptr || s->low_delay){
739 *data_size = sizeof(AVFrame);
740 ff_print_debug_info(s, pict);
742 s->current_picture_ptr= NULL; //so we can detect if frame_end wasnt called (find some nicer solution...)
748 AVCodec ff_rv10_decoder = {
750 .type = AVMEDIA_TYPE_VIDEO,
752 .priv_data_size = sizeof(RVDecContext),
753 .init = rv10_decode_init,
754 .close = rv10_decode_end,
755 .decode = rv10_decode_frame,
756 .capabilities = CODEC_CAP_DR1,
757 .long_name = NULL_IF_CONFIG_SMALL("RealVideo 1.0"),
758 .pix_fmts = ff_pixfmt_list_420,
761 AVCodec ff_rv20_decoder = {
763 .type = AVMEDIA_TYPE_VIDEO,
765 .priv_data_size = sizeof(RVDecContext),
766 .init = rv10_decode_init,
767 .close = rv10_decode_end,
768 .decode = rv10_decode_frame,
769 .capabilities = CODEC_CAP_DR1 | CODEC_CAP_DELAY,
770 .flush = ff_mpeg_flush,
771 .long_name = NULL_IF_CONFIG_SMALL("RealVideo 2.0"),
772 .pix_fmts = ff_pixfmt_list_420,