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->low_delay && s->pict_type==AV_PICTURE_TYPE_B){
336 av_log(s->avctx, AV_LOG_ERROR, "low delay B\n");
339 if(s->last_picture_ptr==NULL && s->pict_type==AV_PICTURE_TYPE_B){
340 av_log(s->avctx, AV_LOG_ERROR, "early B pix\n");
344 if (get_bits1(&s->gb)){
345 av_log(s->avctx, AV_LOG_ERROR, "reserved bit set\n");
349 s->qscale = get_bits(&s->gb, 5);
351 av_log(s->avctx, AV_LOG_ERROR, "error, qscale:0\n");
355 if(RV_GET_MINOR_VER(rv->sub_id) >= 2)
356 s->loop_filter = get_bits1(&s->gb) && !s->avctx->lowres;
358 if(RV_GET_MINOR_VER(rv->sub_id) <= 1)
359 seq = get_bits(&s->gb, 8) << 7;
361 seq = get_bits(&s->gb, 13) << 2;
363 rpr_bits = s->avctx->extradata[1] & 7;
366 rpr_bits = FFMIN((rpr_bits >> 1) + 1, 3);
368 f = get_bits(&s->gb, rpr_bits);
371 new_w= 4*((uint8_t*)s->avctx->extradata)[6+2*f];
372 new_h= 4*((uint8_t*)s->avctx->extradata)[7+2*f];
374 new_w= s->orig_width ;
375 new_h= s->orig_height;
377 if(new_w != s->width || new_h != s->height){
378 AVRational old_aspect = s->avctx->sample_aspect_ratio;
379 av_log(s->avctx, AV_LOG_DEBUG, "attempting to change resolution to %dx%d\n", new_w, new_h);
380 if (av_image_check_size(new_w, new_h, 0, s->avctx) < 0)
382 ff_MPV_common_end(s);
384 // attempt to keep aspect during typical resolution switches
386 old_aspect = (AVRational){1, 1};
387 if (2 * new_w * s->height == new_h * s->width)
388 s->avctx->sample_aspect_ratio = av_mul_q(old_aspect, (AVRational){2, 1});
389 if (new_w * s->height == 2 * new_h * s->width)
390 s->avctx->sample_aspect_ratio = av_mul_q(old_aspect, (AVRational){1, 2});
391 avcodec_set_dimensions(s->avctx, new_w, new_h);
394 if (ff_MPV_common_init(s) < 0)
398 if(s->avctx->debug & FF_DEBUG_PICT_INFO){
399 av_log(s->avctx, AV_LOG_DEBUG, "F %d/%d\n", f, rpr_bits);
402 if (av_image_check_size(s->width, s->height, 0, s->avctx) < 0)
403 return AVERROR_INVALIDDATA;
405 mb_pos = ff_h263_decode_mba(s);
407 seq |= s->time &~0x7FFF;
408 if(seq - s->time > 0x4000) seq -= 0x8000;
409 if(seq - s->time < -0x4000) seq += 0x8000;
411 if(s->pict_type!=AV_PICTURE_TYPE_B){
413 s->pp_time= s->time - s->last_non_b_time;
414 s->last_non_b_time= s->time;
417 s->pb_time= s->pp_time - (s->last_non_b_time - s->time);
418 if(s->pp_time <=s->pb_time || s->pp_time <= s->pp_time - s->pb_time || s->pp_time<=0){
419 av_log(s->avctx, AV_LOG_DEBUG, "messed up order, possible from seeking? skipping current b frame\n");
420 return FRAME_SKIPPED;
422 ff_mpeg4_init_direct_mv(s);
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;
438 if(!s->avctx->lowres)
441 if(s->avctx->debug & FF_DEBUG_PICT_INFO){
442 av_log(s->avctx, AV_LOG_INFO, "num:%5d x:%2d y:%2d type:%d qscale:%2d rnd:%d\n",
443 seq, s->mb_x, s->mb_y, s->pict_type, s->qscale, s->no_rounding);
446 av_assert0(s->pict_type != AV_PICTURE_TYPE_B || !s->low_delay);
448 return s->mb_width*s->mb_height - mb_pos;
451 static av_cold int rv10_decode_init(AVCodecContext *avctx)
453 RVDecContext *rv = avctx->priv_data;
454 MpegEncContext *s = &rv->m;
456 int major_ver, minor_ver, micro_ver;
458 if (avctx->extradata_size < 8) {
459 av_log(avctx, AV_LOG_ERROR, "Extradata is too small.\n");
463 ff_MPV_decode_defaults(s);
466 s->out_format = FMT_H263;
467 s->codec_id= avctx->codec_id;
469 s->orig_width = s->width = avctx->coded_width;
470 s->orig_height= s->height = avctx->coded_height;
472 s->h263_long_vectors= ((uint8_t*)avctx->extradata)[3] & 1;
473 rv->sub_id = AV_RB32((uint8_t*)avctx->extradata + 4);
475 major_ver = RV_GET_MAJOR_VER(rv->sub_id);
476 minor_ver = RV_GET_MINOR_VER(rv->sub_id);
477 micro_ver = RV_GET_MICRO_VER(rv->sub_id);
482 s->rv10_version = micro_ver ? 3 : 1;
483 s->obmc = micro_ver == 2;
486 if (minor_ver >= 2) {
488 s->avctx->has_b_frames = 1;
492 av_log(s->avctx, AV_LOG_ERROR, "unknown header %X\n", rv->sub_id);
493 av_log_missing_feature(avctx, "RV1/2 version", 1);
494 return AVERROR_PATCHWELCOME;
497 if(avctx->debug & FF_DEBUG_PICT_INFO){
498 av_log(avctx, AV_LOG_DEBUG, "ver:%X ver0:%X\n", rv->sub_id, avctx->extradata_size >= 4 ? ((uint32_t*)avctx->extradata)[0] : -1);
501 avctx->pix_fmt = AV_PIX_FMT_YUV420P;
503 if (ff_MPV_common_init(s) < 0)
506 ff_h263_decode_init_vlc(s);
510 INIT_VLC_STATIC(&rv_dc_lum, DC_VLC_BITS, 256,
512 rv_lum_code, 2, 2, 16384);
513 INIT_VLC_STATIC(&rv_dc_chrom, DC_VLC_BITS, 256,
515 rv_chrom_code, 2, 2, 16388);
522 static av_cold int rv10_decode_end(AVCodecContext *avctx)
524 MpegEncContext *s = avctx->priv_data;
526 ff_MPV_common_end(s);
530 static int rv10_decode_packet(AVCodecContext *avctx,
531 const uint8_t *buf, int buf_size, int buf_size2)
533 RVDecContext *rv = avctx->priv_data;
534 MpegEncContext *s = &rv->m;
535 int mb_count, mb_pos, left, start_mb_x, active_bits_size;
537 active_bits_size = buf_size * 8;
538 init_get_bits(&s->gb, buf, FFMAX(buf_size, buf_size2) * 8);
539 if(s->codec_id ==AV_CODEC_ID_RV10)
540 mb_count = rv10_decode_picture_header(s);
542 mb_count = rv20_decode_picture_header(rv);
544 av_log(s->avctx, AV_LOG_ERROR, "HEADER ERROR\n");
548 if (s->mb_x >= s->mb_width ||
549 s->mb_y >= s->mb_height) {
550 av_log(s->avctx, AV_LOG_ERROR, "POS ERROR %d %d\n", s->mb_x, s->mb_y);
553 mb_pos = s->mb_y * s->mb_width + s->mb_x;
554 left = s->mb_width * s->mb_height - mb_pos;
555 if (mb_count > left) {
556 av_log(s->avctx, AV_LOG_ERROR, "COUNT ERROR\n");
560 if ((s->mb_x == 0 && s->mb_y == 0) || s->current_picture_ptr==NULL) {
561 if(s->current_picture_ptr){ //FIXME write parser so we always have complete frames?
564 s->mb_x= s->mb_y = s->resync_mb_x = s->resync_mb_y= 0;
566 if(ff_MPV_frame_start(s, avctx) < 0)
568 ff_er_frame_start(s);
570 if (s->current_picture_ptr->f.pict_type != s->pict_type) {
571 av_log(s->avctx, AV_LOG_ERROR, "Slice type mismatch\n");
577 av_dlog(avctx, "qscale=%d\n", s->qscale);
579 /* default quantization values */
580 if(s->codec_id== AV_CODEC_ID_RV10){
581 if(s->mb_y==0) s->first_slice_line=1;
583 s->first_slice_line=1;
584 s->resync_mb_x= s->mb_x;
587 s->resync_mb_y= s->mb_y;
590 s->c_dc_scale_table= ff_aic_dc_scale_table;
593 s->c_dc_scale_table= ff_mpeg1_dc_scale_table;
596 if(s->modified_quant)
597 s->chroma_qscale_table= ff_h263_chroma_qscale_table;
599 ff_set_qscale(s, s->qscale);
601 s->rv10_first_dc_coded[0] = 0;
602 s->rv10_first_dc_coded[1] = 0;
603 s->rv10_first_dc_coded[2] = 0;
607 s->block_wrap[3]= s->b8_stride;
609 s->block_wrap[5]= s->mb_stride;
610 ff_init_block_index(s);
611 /* decode each macroblock */
613 for(s->mb_num_left= mb_count; s->mb_num_left>0; s->mb_num_left--) {
615 ff_update_block_index(s);
616 av_dlog(avctx, "**mb x=%d y=%d\n", s->mb_x, s->mb_y);
618 s->mv_dir = MV_DIR_FORWARD;
619 s->mv_type = MV_TYPE_16X16;
620 ret=ff_h263_decode_mb(s, s->block);
622 // Repeat the slice end check from ff_h263_decode_mb with our active
624 if (ret != SLICE_ERROR) {
625 int v = show_bits(&s->gb, 16);
627 if (get_bits_count(&s->gb) + 16 > active_bits_size)
628 v >>= get_bits_count(&s->gb) + 16 - active_bits_size;
633 if (ret != SLICE_ERROR && active_bits_size < get_bits_count(&s->gb) &&
634 8 * buf_size2 >= get_bits_count(&s->gb)) {
635 active_bits_size = buf_size2 * 8;
636 av_log(avctx, AV_LOG_DEBUG, "update size from %d to %d\n",
637 8 * buf_size, active_bits_size);
641 if (ret == SLICE_ERROR || active_bits_size < get_bits_count(&s->gb)) {
642 av_log(s->avctx, AV_LOG_ERROR, "ERROR at MB %d %d\n", s->mb_x, s->mb_y);
645 if(s->pict_type != AV_PICTURE_TYPE_B)
646 ff_h263_update_motion_val(s);
647 ff_MPV_decode_mb(s, s->block);
649 ff_h263_loop_filter(s);
651 if (++s->mb_x == s->mb_width) {
654 ff_init_block_index(s);
656 if(s->mb_x == s->resync_mb_x)
657 s->first_slice_line=0;
658 if(ret == SLICE_END) break;
661 ff_er_add_slice(s, start_mb_x, s->resync_mb_y, s->mb_x-1, s->mb_y, ER_MB_END);
663 return active_bits_size;
666 static int get_slice_offset(AVCodecContext *avctx, const uint8_t *buf, int n)
668 if(avctx->slice_count) return avctx->slice_offset[n];
669 else return AV_RL32(buf + n*8);
672 static int rv10_decode_frame(AVCodecContext *avctx,
673 void *data, int *got_frame,
676 const uint8_t *buf = avpkt->data;
677 int buf_size = avpkt->size;
678 MpegEncContext *s = avctx->priv_data;
680 AVFrame *pict = data;
682 const uint8_t *slices_hdr = NULL;
684 av_dlog(avctx, "*****frame %d size=%d\n", avctx->frame_number, buf_size);
685 s->flags = avctx->flags;
686 s->flags2 = avctx->flags2;
688 /* no supplementary picture */
693 if(!avctx->slice_count){
694 slice_count = (*buf++) + 1;
696 slices_hdr = buf + 4;
697 buf += 8 * slice_count;
698 buf_size -= 8 * slice_count;
700 return AVERROR_INVALIDDATA;
702 slice_count = avctx->slice_count;
704 for(i=0; i<slice_count; i++){
705 unsigned offset = get_slice_offset(avctx, slices_hdr, i);
708 if (offset >= buf_size)
709 return AVERROR_INVALIDDATA;
711 if(i+1 == slice_count)
712 size= buf_size - offset;
714 size= get_slice_offset(avctx, slices_hdr, i+1) - offset;
716 if(i+2 >= slice_count)
717 size2= buf_size - offset;
719 size2= get_slice_offset(avctx, slices_hdr, i+2) - offset;
721 if (size <= 0 || size2 <= 0 ||
722 offset + FFMAX(size, size2) > buf_size)
723 return AVERROR_INVALIDDATA;
725 if(rv10_decode_packet(avctx, buf+offset, size, size2) > 8*size)
729 if(s->current_picture_ptr != NULL && s->mb_y>=s->mb_height){
733 if (s->pict_type == AV_PICTURE_TYPE_B || s->low_delay) {
734 *pict = s->current_picture_ptr->f;
735 } else if (s->last_picture_ptr != NULL) {
736 *pict = s->last_picture_ptr->f;
739 if(s->last_picture_ptr || s->low_delay){
741 ff_print_debug_info(s, pict);
743 s->current_picture_ptr= NULL; //so we can detect if frame_end wasnt called (find some nicer solution...)
749 AVCodec ff_rv10_decoder = {
751 .type = AVMEDIA_TYPE_VIDEO,
752 .id = AV_CODEC_ID_RV10,
753 .priv_data_size = sizeof(RVDecContext),
754 .init = rv10_decode_init,
755 .close = rv10_decode_end,
756 .decode = rv10_decode_frame,
757 .capabilities = CODEC_CAP_DR1,
759 .long_name = NULL_IF_CONFIG_SMALL("RealVideo 1.0"),
760 .pix_fmts = ff_pixfmt_list_420,
763 AVCodec ff_rv20_decoder = {
765 .type = AVMEDIA_TYPE_VIDEO,
766 .id = AV_CODEC_ID_RV20,
767 .priv_data_size = sizeof(RVDecContext),
768 .init = rv10_decode_init,
769 .close = rv10_decode_end,
770 .decode = rv10_decode_frame,
771 .capabilities = CODEC_CAP_DR1 | CODEC_CAP_DELAY,
772 .flush = ff_mpeg_flush,
774 .long_name = NULL_IF_CONFIG_SMALL("RealVideo 2.0"),
775 .pix_fmts = ff_pixfmt_list_420,