cosmetics: Align codec declarations
[libav.git] / libavcodec / rv10.c
1 /*
2 * RV10/RV20 decoder
3 * Copyright (c) 2000,2001 Fabrice Bellard
4 * Copyright (c) 2002-2004 Michael Niedermayer
5 *
6 * This file is part of Libav.
7 *
8 * Libav 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.
12 *
13 * Libav 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.
17 *
18 * You should have received a copy of the GNU Lesser General Public
19 * License along with Libav; if not, write to the Free Software
20 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
21 */
22
23 /**
24 * @file
25 * RV10/RV20 decoder
26 */
27
28 #include "libavutil/imgutils.h"
29 #include "avcodec.h"
30 #include "dsputil.h"
31 #include "mpegvideo.h"
32 #include "mpeg4video.h"
33 #include "h263.h"
34
35 //#define DEBUG
36
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)
40
41 #define DC_VLC_BITS 14 //FIXME find a better solution
42
43 typedef struct RVDecContext {
44 MpegEncContext m;
45 int sub_id;
46 } RVDecContext;
47
48 static const uint16_t rv_lum_code[256] =
49 {
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,
82 };
83
84 static const uint8_t rv_lum_bits[256] =
85 {
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,
118 };
119
120 static const uint16_t rv_chrom_code[256] =
121 {
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,
154 };
155
156 static const uint8_t rv_chrom_bits[256] =
157 {
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,
190 };
191
192 static VLC rv_dc_lum, rv_dc_chrom;
193
194 int ff_rv_decode_dc(MpegEncContext *s, int n)
195 {
196 int code;
197
198 if (n < 4) {
199 code = get_vlc2(&s->gb, rv_dc_lum.table, DC_VLC_BITS, 2);
200 if (code < 0) {
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);
205 if (code == 0x7c) {
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);
212 else
213 code = (int8_t)(get_bits(&s->gb, 8));
214 } else if (code == 0x7f) {
215 skip_bits(&s->gb, 11);
216 code = 1;
217 }
218 } else {
219 code -= 128;
220 }
221 } else {
222 code = get_vlc2(&s->gb, rv_dc_chrom.table, DC_VLC_BITS, 2);
223 /* same remark */
224 if (code < 0) {
225 code = get_bits(&s->gb, 9);
226 if (code == 0x1fc) {
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);
232 code = 1;
233 } else {
234 av_log(s->avctx, AV_LOG_ERROR, "chroma dc error\n");
235 return 0xffff;
236 }
237 } else {
238 code -= 128;
239 }
240 }
241 return -code;
242 }
243
244 /* read RV 1.0 compatible frame header */
245 static int rv10_decode_picture_header(MpegEncContext *s)
246 {
247 int mb_count, pb_frame, marker, mb_xy;
248
249 marker = get_bits1(&s->gb);
250
251 if (get_bits1(&s->gb))
252 s->pict_type = AV_PICTURE_TYPE_P;
253 else
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);
257
258 av_dlog(s->avctx, "pict_type=%d pb_frame=%d\n", s->pict_type, pb_frame);
259
260 if (pb_frame){
261 av_log(s->avctx, AV_LOG_ERROR, "pb frame not supported\n");
262 return -1;
263 }
264
265 s->qscale = get_bits(&s->gb, 5);
266 if(s->qscale==0){
267 av_log(s->avctx, AV_LOG_ERROR, "error, qscale:0\n");
268 return -1;
269 }
270
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]);
279 }
280 }
281 /* if multiple packets per frame are sent, the position at which
282 to display the macroblocks is coded here */
283
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);
289 } else {
290 s->mb_x = 0;
291 s->mb_y = 0;
292 mb_count = s->mb_width * s->mb_height;
293 }
294 skip_bits(&s->gb, 3); /* ignored */
295 s->f_code = 1;
296 s->unrestricted_mv = 1;
297
298 return mb_count;
299 }
300
301 static int rv20_decode_picture_header(RVDecContext *rv)
302 {
303 MpegEncContext *s = &rv->m;
304 int seq, mb_pos, i;
305 int rpr_bits;
306
307 i= get_bits(&s->gb, 2);
308 switch(i){
309 case 0: s->pict_type= AV_PICTURE_TYPE_I; break;
310 case 1: s->pict_type= AV_PICTURE_TYPE_I; break; //hmm ...
311 case 2: s->pict_type= AV_PICTURE_TYPE_P; break;
312 case 3: s->pict_type= AV_PICTURE_TYPE_B; break;
313 default:
314 av_log(s->avctx, AV_LOG_ERROR, "unknown frame type\n");
315 return -1;
316 }
317
318 if(s->last_picture_ptr==NULL && s->pict_type==AV_PICTURE_TYPE_B){
319 av_log(s->avctx, AV_LOG_ERROR, "early B pix\n");
320 return -1;
321 }
322
323 if (get_bits1(&s->gb)){
324 av_log(s->avctx, AV_LOG_ERROR, "reserved bit set\n");
325 return -1;
326 }
327
328 s->qscale = get_bits(&s->gb, 5);
329 if(s->qscale==0){
330 av_log(s->avctx, AV_LOG_ERROR, "error, qscale:0\n");
331 return -1;
332 }
333
334 if(RV_GET_MINOR_VER(rv->sub_id) >= 2)
335 s->loop_filter = get_bits1(&s->gb);
336
337 if(RV_GET_MINOR_VER(rv->sub_id) <= 1)
338 seq = get_bits(&s->gb, 8) << 7;
339 else
340 seq = get_bits(&s->gb, 13) << 2;
341
342 rpr_bits = s->avctx->extradata[1] & 7;
343 if(rpr_bits){
344 int f, new_w, new_h;
345 rpr_bits = FFMIN((rpr_bits >> 1) + 1, 3);
346
347 f = get_bits(&s->gb, rpr_bits);
348
349 if(f){
350 new_w= 4*((uint8_t*)s->avctx->extradata)[6+2*f];
351 new_h= 4*((uint8_t*)s->avctx->extradata)[7+2*f];
352 }else{
353 new_w= s->orig_width ;
354 new_h= s->orig_height;
355 }
356 if(new_w != s->width || new_h != s->height){
357 av_log(s->avctx, AV_LOG_DEBUG, "attempting to change resolution to %dx%d\n", new_w, new_h);
358 if (av_image_check_size(new_w, new_h, 0, s->avctx) < 0)
359 return -1;
360 ff_MPV_common_end(s);
361 avcodec_set_dimensions(s->avctx, new_w, new_h);
362 s->width = new_w;
363 s->height = new_h;
364 if (ff_MPV_common_init(s) < 0)
365 return -1;
366 }
367
368 if(s->avctx->debug & FF_DEBUG_PICT_INFO){
369 av_log(s->avctx, AV_LOG_DEBUG, "F %d/%d\n", f, rpr_bits);
370 }
371 } else if (av_image_check_size(s->width, s->height, 0, s->avctx) < 0)
372 return AVERROR_INVALIDDATA;
373
374 mb_pos = ff_h263_decode_mba(s);
375
376 //av_log(s->avctx, AV_LOG_DEBUG, "%d\n", seq);
377 seq |= s->time &~0x7FFF;
378 if(seq - s->time > 0x4000) seq -= 0x8000;
379 if(seq - s->time < -0x4000) seq += 0x8000;
380 if(seq != s->time){
381 if(s->pict_type!=AV_PICTURE_TYPE_B){
382 s->time= seq;
383 s->pp_time= s->time - s->last_non_b_time;
384 s->last_non_b_time= s->time;
385 }else{
386 s->time= seq;
387 s->pb_time= s->pp_time - (s->last_non_b_time - s->time);
388 if(s->pp_time <=s->pb_time || s->pp_time <= s->pp_time - s->pb_time || s->pp_time<=0){
389 av_log(s->avctx, AV_LOG_DEBUG, "messed up order, possible from seeking? skipping current b frame\n");
390 return FRAME_SKIPPED;
391 }
392 ff_mpeg4_init_direct_mv(s);
393 }
394 }
395 // printf("%d %d %d %d %d\n", seq, (int)s->time, (int)s->last_non_b_time, s->pp_time, s->pb_time);
396 /*for(i=0; i<32; i++){
397 av_log(s->avctx, AV_LOG_DEBUG, "%d", get_bits1(&s->gb));
398 }
399 av_log(s->avctx, AV_LOG_DEBUG, "\n");*/
400 s->no_rounding= get_bits1(&s->gb);
401
402 if(RV_GET_MINOR_VER(rv->sub_id) <= 1 && s->pict_type == AV_PICTURE_TYPE_B)
403 skip_bits(&s->gb, 5); // binary decoder reads 3+2 bits here but they don't seem to be used
404
405 s->f_code = 1;
406 s->unrestricted_mv = 1;
407 s->h263_aic= s->pict_type == AV_PICTURE_TYPE_I;
408 // s->alt_inter_vlc=1;
409 // s->obmc=1;
410 // s->umvplus=1;
411 s->modified_quant=1;
412 if(!s->avctx->lowres)
413 s->loop_filter=1;
414
415 if(s->avctx->debug & FF_DEBUG_PICT_INFO){
416 av_log(s->avctx, AV_LOG_INFO, "num:%5d x:%2d y:%2d type:%d qscale:%2d rnd:%d\n",
417 seq, s->mb_x, s->mb_y, s->pict_type, s->qscale, s->no_rounding);
418 }
419
420 assert(s->pict_type != AV_PICTURE_TYPE_B || !s->low_delay);
421
422 return s->mb_width*s->mb_height - mb_pos;
423 }
424
425 static av_cold int rv10_decode_init(AVCodecContext *avctx)
426 {
427 RVDecContext *rv = avctx->priv_data;
428 MpegEncContext *s = &rv->m;
429 static int done=0;
430 int major_ver, minor_ver, micro_ver;
431
432 if (avctx->extradata_size < 8) {
433 av_log(avctx, AV_LOG_ERROR, "Extradata is too small.\n");
434 return -1;
435 }
436
437 ff_MPV_decode_defaults(s);
438
439 s->avctx= avctx;
440 s->out_format = FMT_H263;
441 s->codec_id= avctx->codec_id;
442 avctx->flags |= CODEC_FLAG_EMU_EDGE;
443
444 s->orig_width = s->width = avctx->coded_width;
445 s->orig_height= s->height = avctx->coded_height;
446
447 s->h263_long_vectors= ((uint8_t*)avctx->extradata)[3] & 1;
448 rv->sub_id = AV_RB32((uint8_t*)avctx->extradata + 4);
449
450 major_ver = RV_GET_MAJOR_VER(rv->sub_id);
451 minor_ver = RV_GET_MINOR_VER(rv->sub_id);
452 micro_ver = RV_GET_MICRO_VER(rv->sub_id);
453
454 s->low_delay = 1;
455 switch (major_ver) {
456 case 1:
457 s->rv10_version = micro_ver ? 3 : 1;
458 s->obmc = micro_ver == 2;
459 break;
460 case 2:
461 if (minor_ver >= 2) {
462 s->low_delay = 0;
463 s->avctx->has_b_frames = 1;
464 }
465 break;
466 default:
467 av_log(s->avctx, AV_LOG_ERROR, "unknown header %X\n", rv->sub_id);
468 av_log_missing_feature(avctx, "RV1/2 version", 1);
469 return AVERROR_PATCHWELCOME;
470 }
471
472 if(avctx->debug & FF_DEBUG_PICT_INFO){
473 av_log(avctx, AV_LOG_DEBUG, "ver:%X ver0:%X\n", rv->sub_id, avctx->extradata_size >= 4 ? ((uint32_t*)avctx->extradata)[0] : -1);
474 }
475
476 avctx->pix_fmt = PIX_FMT_YUV420P;
477
478 if (ff_MPV_common_init(s) < 0)
479 return -1;
480
481 ff_h263_decode_init_vlc(s);
482
483 /* init rv vlc */
484 if (!done) {
485 INIT_VLC_STATIC(&rv_dc_lum, DC_VLC_BITS, 256,
486 rv_lum_bits, 1, 1,
487 rv_lum_code, 2, 2, 16384);
488 INIT_VLC_STATIC(&rv_dc_chrom, DC_VLC_BITS, 256,
489 rv_chrom_bits, 1, 1,
490 rv_chrom_code, 2, 2, 16388);
491 done = 1;
492 }
493
494 return 0;
495 }
496
497 static av_cold int rv10_decode_end(AVCodecContext *avctx)
498 {
499 MpegEncContext *s = avctx->priv_data;
500
501 ff_MPV_common_end(s);
502 return 0;
503 }
504
505 static int rv10_decode_packet(AVCodecContext *avctx,
506 const uint8_t *buf, int buf_size, int buf_size2)
507 {
508 RVDecContext *rv = avctx->priv_data;
509 MpegEncContext *s = &rv->m;
510 int mb_count, mb_pos, left, start_mb_x, active_bits_size;
511
512 active_bits_size = buf_size * 8;
513 init_get_bits(&s->gb, buf, FFMAX(buf_size, buf_size2) * 8);
514 if(s->codec_id ==CODEC_ID_RV10)
515 mb_count = rv10_decode_picture_header(s);
516 else
517 mb_count = rv20_decode_picture_header(rv);
518 if (mb_count < 0) {
519 av_log(s->avctx, AV_LOG_ERROR, "HEADER ERROR\n");
520 return -1;
521 }
522
523 if (s->mb_x >= s->mb_width ||
524 s->mb_y >= s->mb_height) {
525 av_log(s->avctx, AV_LOG_ERROR, "POS ERROR %d %d\n", s->mb_x, s->mb_y);
526 return -1;
527 }
528 mb_pos = s->mb_y * s->mb_width + s->mb_x;
529 left = s->mb_width * s->mb_height - mb_pos;
530 if (mb_count > left) {
531 av_log(s->avctx, AV_LOG_ERROR, "COUNT ERROR\n");
532 return -1;
533 }
534
535 if ((s->mb_x == 0 && s->mb_y == 0) || s->current_picture_ptr==NULL) {
536 if(s->current_picture_ptr){ //FIXME write parser so we always have complete frames?
537 ff_er_frame_end(s);
538 ff_MPV_frame_end(s);
539 s->mb_x= s->mb_y = s->resync_mb_x = s->resync_mb_y= 0;
540 }
541 if(ff_MPV_frame_start(s, avctx) < 0)
542 return -1;
543 ff_er_frame_start(s);
544 } else {
545 if (s->current_picture_ptr->f.pict_type != s->pict_type) {
546 av_log(s->avctx, AV_LOG_ERROR, "Slice type mismatch\n");
547 return -1;
548 }
549 }
550
551 av_dlog(avctx, "qscale=%d\n", s->qscale);
552
553 /* default quantization values */
554 if(s->codec_id== CODEC_ID_RV10){
555 if(s->mb_y==0) s->first_slice_line=1;
556 }else{
557 s->first_slice_line=1;
558 s->resync_mb_x= s->mb_x;
559 }
560 start_mb_x= s->mb_x;
561 s->resync_mb_y= s->mb_y;
562 if(s->h263_aic){
563 s->y_dc_scale_table=
564 s->c_dc_scale_table= ff_aic_dc_scale_table;
565 }else{
566 s->y_dc_scale_table=
567 s->c_dc_scale_table= ff_mpeg1_dc_scale_table;
568 }
569
570 if(s->modified_quant)
571 s->chroma_qscale_table= ff_h263_chroma_qscale_table;
572
573 ff_set_qscale(s, s->qscale);
574
575 s->rv10_first_dc_coded[0] = 0;
576 s->rv10_first_dc_coded[1] = 0;
577 s->rv10_first_dc_coded[2] = 0;
578 s->block_wrap[0]=
579 s->block_wrap[1]=
580 s->block_wrap[2]=
581 s->block_wrap[3]= s->b8_stride;
582 s->block_wrap[4]=
583 s->block_wrap[5]= s->mb_stride;
584 ff_init_block_index(s);
585 /* decode each macroblock */
586
587 for(s->mb_num_left= mb_count; s->mb_num_left>0; s->mb_num_left--) {
588 int ret;
589 ff_update_block_index(s);
590 av_dlog(avctx, "**mb x=%d y=%d\n", s->mb_x, s->mb_y);
591
592 s->mv_dir = MV_DIR_FORWARD;
593 s->mv_type = MV_TYPE_16X16;
594 ret=ff_h263_decode_mb(s, s->block);
595
596 // Repeat the slice end check from ff_h263_decode_mb with our active
597 // bitstream size
598 if (ret != SLICE_ERROR) {
599 int v = show_bits(&s->gb, 16);
600
601 if (get_bits_count(&s->gb) + 16 > active_bits_size)
602 v >>= get_bits_count(&s->gb) + 16 - active_bits_size;
603
604 if (!v)
605 ret = SLICE_END;
606 }
607 if (ret != SLICE_ERROR && active_bits_size < get_bits_count(&s->gb) &&
608 8 * buf_size2 >= get_bits_count(&s->gb)) {
609 active_bits_size = buf_size2 * 8;
610 av_log(avctx, AV_LOG_DEBUG, "update size from %d to %d\n",
611 8 * buf_size, active_bits_size);
612 ret= SLICE_OK;
613 }
614
615 if (ret == SLICE_ERROR || active_bits_size < get_bits_count(&s->gb)) {
616 av_log(s->avctx, AV_LOG_ERROR, "ERROR at MB %d %d\n", s->mb_x, s->mb_y);
617 return -1;
618 }
619 if(s->pict_type != AV_PICTURE_TYPE_B)
620 ff_h263_update_motion_val(s);
621 ff_MPV_decode_mb(s, s->block);
622 if(s->loop_filter)
623 ff_h263_loop_filter(s);
624
625 if (++s->mb_x == s->mb_width) {
626 s->mb_x = 0;
627 s->mb_y++;
628 ff_init_block_index(s);
629 }
630 if(s->mb_x == s->resync_mb_x)
631 s->first_slice_line=0;
632 if(ret == SLICE_END) break;
633 }
634
635 ff_er_add_slice(s, start_mb_x, s->resync_mb_y, s->mb_x-1, s->mb_y, ER_MB_END);
636
637 return active_bits_size;
638 }
639
640 static int get_slice_offset(AVCodecContext *avctx, const uint8_t *buf, int n)
641 {
642 if(avctx->slice_count) return avctx->slice_offset[n];
643 else return AV_RL32(buf + n*8);
644 }
645
646 static int rv10_decode_frame(AVCodecContext *avctx,
647 void *data, int *data_size,
648 AVPacket *avpkt)
649 {
650 const uint8_t *buf = avpkt->data;
651 int buf_size = avpkt->size;
652 MpegEncContext *s = avctx->priv_data;
653 int i;
654 AVFrame *pict = data;
655 int slice_count;
656 const uint8_t *slices_hdr = NULL;
657
658 av_dlog(avctx, "*****frame %d size=%d\n", avctx->frame_number, buf_size);
659
660 /* no supplementary picture */
661 if (buf_size == 0) {
662 return 0;
663 }
664
665 if(!avctx->slice_count){
666 slice_count = (*buf++) + 1;
667 buf_size--;
668 slices_hdr = buf + 4;
669 buf += 8 * slice_count;
670 buf_size -= 8 * slice_count;
671 if (buf_size <= 0)
672 return AVERROR_INVALIDDATA;
673 }else
674 slice_count = avctx->slice_count;
675
676 for(i=0; i<slice_count; i++){
677 unsigned offset = get_slice_offset(avctx, slices_hdr, i);
678 int size, size2;
679
680 if (offset >= buf_size)
681 return AVERROR_INVALIDDATA;
682
683 if(i+1 == slice_count)
684 size= buf_size - offset;
685 else
686 size= get_slice_offset(avctx, slices_hdr, i+1) - offset;
687
688 if(i+2 >= slice_count)
689 size2= buf_size - offset;
690 else
691 size2= get_slice_offset(avctx, slices_hdr, i+2) - offset;
692
693 if (size <= 0 || size2 <= 0 ||
694 offset + FFMAX(size, size2) > buf_size)
695 return AVERROR_INVALIDDATA;
696
697 if(rv10_decode_packet(avctx, buf+offset, size, size2) > 8*size)
698 i++;
699 }
700
701 if(s->current_picture_ptr != NULL && s->mb_y>=s->mb_height){
702 ff_er_frame_end(s);
703 ff_MPV_frame_end(s);
704
705 if (s->pict_type == AV_PICTURE_TYPE_B || s->low_delay) {
706 *pict = s->current_picture_ptr->f;
707 } else if (s->last_picture_ptr != NULL) {
708 *pict = s->last_picture_ptr->f;
709 }
710
711 if(s->last_picture_ptr || s->low_delay){
712 *data_size = sizeof(AVFrame);
713 ff_print_debug_info(s, pict);
714 }
715 s->current_picture_ptr= NULL; //so we can detect if frame_end wasnt called (find some nicer solution...)
716 }
717
718 return avpkt->size;
719 }
720
721 AVCodec ff_rv10_decoder = {
722 .name = "rv10",
723 .type = AVMEDIA_TYPE_VIDEO,
724 .id = CODEC_ID_RV10,
725 .priv_data_size = sizeof(RVDecContext),
726 .init = rv10_decode_init,
727 .close = rv10_decode_end,
728 .decode = rv10_decode_frame,
729 .capabilities = CODEC_CAP_DR1,
730 .max_lowres = 3,
731 .long_name = NULL_IF_CONFIG_SMALL("RealVideo 1.0"),
732 .pix_fmts = ff_pixfmt_list_420,
733 };
734
735 AVCodec ff_rv20_decoder = {
736 .name = "rv20",
737 .type = AVMEDIA_TYPE_VIDEO,
738 .id = CODEC_ID_RV20,
739 .priv_data_size = sizeof(RVDecContext),
740 .init = rv10_decode_init,
741 .close = rv10_decode_end,
742 .decode = rv10_decode_frame,
743 .capabilities = CODEC_CAP_DR1 | CODEC_CAP_DELAY,
744 .flush = ff_mpeg_flush,
745 .max_lowres = 3,
746 .long_name = NULL_IF_CONFIG_SMALL("RealVideo 2.0"),
747 .pix_fmts = ff_pixfmt_list_420,
748 };