3 * Copyright (c) 2000,2001 Fabrice Bellard
4 * Copyright (c) 2002-2004 Michael Niedermayer
6 * This file is part of Libav.
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.
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.
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
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;
307 i= get_bits(&s->gb, 2);
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;
314 av_log(s->avctx, AV_LOG_ERROR, "unknown frame type\n");
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");
323 if (get_bits1(&s->gb)){
324 av_log(s->avctx, AV_LOG_ERROR, "reserved bit set\n");
328 s->qscale = get_bits(&s->gb, 5);
330 av_log(s->avctx, AV_LOG_ERROR, "error, qscale:0\n");
334 if(RV_GET_MINOR_VER(rv->sub_id) >= 2)
335 s->loop_filter = get_bits1(&s->gb);
337 if(RV_GET_MINOR_VER(rv->sub_id) <= 1)
338 seq = get_bits(&s->gb, 8) << 7;
340 seq = get_bits(&s->gb, 13) << 2;
342 rpr_bits = s->avctx->extradata[1] & 7;
345 rpr_bits = FFMIN((rpr_bits >> 1) + 1, 3);
347 f = get_bits(&s->gb, rpr_bits);
350 new_w= 4*((uint8_t*)s->avctx->extradata)[6+2*f];
351 new_h= 4*((uint8_t*)s->avctx->extradata)[7+2*f];
353 new_w= s->orig_width ;
354 new_h= s->orig_height;
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)
360 ff_MPV_common_end(s);
361 avcodec_set_dimensions(s->avctx, new_w, new_h);
364 if (ff_MPV_common_init(s) < 0)
368 if(s->avctx->debug & FF_DEBUG_PICT_INFO){
369 av_log(s->avctx, AV_LOG_DEBUG, "F %d/%d\n", f, rpr_bits);
371 } else if (av_image_check_size(s->width, s->height, 0, s->avctx) < 0)
372 return AVERROR_INVALIDDATA;
374 mb_pos = ff_h263_decode_mba(s);
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;
381 if(s->pict_type!=AV_PICTURE_TYPE_B){
383 s->pp_time= s->time - s->last_non_b_time;
384 s->last_non_b_time= s->time;
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;
392 ff_mpeg4_init_direct_mv(s);
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));
399 av_log(s->avctx, AV_LOG_DEBUG, "\n");*/
400 s->no_rounding= get_bits1(&s->gb);
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
406 s->unrestricted_mv = 1;
407 s->h263_aic= s->pict_type == AV_PICTURE_TYPE_I;
408 // s->alt_inter_vlc=1;
412 if(!s->avctx->lowres)
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);
420 assert(s->pict_type != AV_PICTURE_TYPE_B || !s->low_delay);
422 return s->mb_width*s->mb_height - mb_pos;
425 static av_cold int rv10_decode_init(AVCodecContext *avctx)
427 RVDecContext *rv = avctx->priv_data;
428 MpegEncContext *s = &rv->m;
430 int major_ver, minor_ver, micro_ver;
432 if (avctx->extradata_size < 8) {
433 av_log(avctx, AV_LOG_ERROR, "Extradata is too small.\n");
437 ff_MPV_decode_defaults(s);
440 s->out_format = FMT_H263;
441 s->codec_id= avctx->codec_id;
442 avctx->flags |= CODEC_FLAG_EMU_EDGE;
444 s->orig_width = s->width = avctx->coded_width;
445 s->orig_height= s->height = avctx->coded_height;
447 s->h263_long_vectors= ((uint8_t*)avctx->extradata)[3] & 1;
448 rv->sub_id = AV_RB32((uint8_t*)avctx->extradata + 4);
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);
457 s->rv10_version = micro_ver ? 3 : 1;
458 s->obmc = micro_ver == 2;
461 if (minor_ver >= 2) {
463 s->avctx->has_b_frames = 1;
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;
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);
476 avctx->pix_fmt = PIX_FMT_YUV420P;
478 if (ff_MPV_common_init(s) < 0)
481 ff_h263_decode_init_vlc(s);
485 INIT_VLC_STATIC(&rv_dc_lum, DC_VLC_BITS, 256,
487 rv_lum_code, 2, 2, 16384);
488 INIT_VLC_STATIC(&rv_dc_chrom, DC_VLC_BITS, 256,
490 rv_chrom_code, 2, 2, 16388);
497 static av_cold int rv10_decode_end(AVCodecContext *avctx)
499 MpegEncContext *s = avctx->priv_data;
501 ff_MPV_common_end(s);
505 static int rv10_decode_packet(AVCodecContext *avctx,
506 const uint8_t *buf, int buf_size, int buf_size2)
508 RVDecContext *rv = avctx->priv_data;
509 MpegEncContext *s = &rv->m;
510 int mb_count, mb_pos, left, start_mb_x, active_bits_size;
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);
517 mb_count = rv20_decode_picture_header(rv);
519 av_log(s->avctx, AV_LOG_ERROR, "HEADER ERROR\n");
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);
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");
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?
539 s->mb_x= s->mb_y = s->resync_mb_x = s->resync_mb_y= 0;
541 if(ff_MPV_frame_start(s, avctx) < 0)
543 ff_er_frame_start(s);
545 if (s->current_picture_ptr->f.pict_type != s->pict_type) {
546 av_log(s->avctx, AV_LOG_ERROR, "Slice type mismatch\n");
551 av_dlog(avctx, "qscale=%d\n", s->qscale);
553 /* default quantization values */
554 if(s->codec_id== CODEC_ID_RV10){
555 if(s->mb_y==0) s->first_slice_line=1;
557 s->first_slice_line=1;
558 s->resync_mb_x= s->mb_x;
561 s->resync_mb_y= s->mb_y;
564 s->c_dc_scale_table= ff_aic_dc_scale_table;
567 s->c_dc_scale_table= ff_mpeg1_dc_scale_table;
570 if(s->modified_quant)
571 s->chroma_qscale_table= ff_h263_chroma_qscale_table;
573 ff_set_qscale(s, s->qscale);
575 s->rv10_first_dc_coded[0] = 0;
576 s->rv10_first_dc_coded[1] = 0;
577 s->rv10_first_dc_coded[2] = 0;
581 s->block_wrap[3]= s->b8_stride;
583 s->block_wrap[5]= s->mb_stride;
584 ff_init_block_index(s);
585 /* decode each macroblock */
587 for(s->mb_num_left= mb_count; s->mb_num_left>0; s->mb_num_left--) {
589 ff_update_block_index(s);
590 av_dlog(avctx, "**mb x=%d y=%d\n", s->mb_x, s->mb_y);
592 s->mv_dir = MV_DIR_FORWARD;
593 s->mv_type = MV_TYPE_16X16;
594 ret=ff_h263_decode_mb(s, s->block);
596 // Repeat the slice end check from ff_h263_decode_mb with our active
598 if (ret != SLICE_ERROR) {
599 int v = show_bits(&s->gb, 16);
601 if (get_bits_count(&s->gb) + 16 > active_bits_size)
602 v >>= get_bits_count(&s->gb) + 16 - active_bits_size;
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);
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);
619 if(s->pict_type != AV_PICTURE_TYPE_B)
620 ff_h263_update_motion_val(s);
621 ff_MPV_decode_mb(s, s->block);
623 ff_h263_loop_filter(s);
625 if (++s->mb_x == s->mb_width) {
628 ff_init_block_index(s);
630 if(s->mb_x == s->resync_mb_x)
631 s->first_slice_line=0;
632 if(ret == SLICE_END) break;
635 ff_er_add_slice(s, start_mb_x, s->resync_mb_y, s->mb_x-1, s->mb_y, ER_MB_END);
637 return active_bits_size;
640 static int get_slice_offset(AVCodecContext *avctx, const uint8_t *buf, int n)
642 if(avctx->slice_count) return avctx->slice_offset[n];
643 else return AV_RL32(buf + n*8);
646 static int rv10_decode_frame(AVCodecContext *avctx,
647 void *data, int *data_size,
650 const uint8_t *buf = avpkt->data;
651 int buf_size = avpkt->size;
652 MpegEncContext *s = avctx->priv_data;
654 AVFrame *pict = data;
656 const uint8_t *slices_hdr = NULL;
658 av_dlog(avctx, "*****frame %d size=%d\n", avctx->frame_number, buf_size);
660 /* no supplementary picture */
665 if(!avctx->slice_count){
666 slice_count = (*buf++) + 1;
668 slices_hdr = buf + 4;
669 buf += 8 * slice_count;
670 buf_size -= 8 * slice_count;
672 return AVERROR_INVALIDDATA;
674 slice_count = avctx->slice_count;
676 for(i=0; i<slice_count; i++){
677 unsigned offset = get_slice_offset(avctx, slices_hdr, i);
680 if (offset >= buf_size)
681 return AVERROR_INVALIDDATA;
683 if(i+1 == slice_count)
684 size= buf_size - offset;
686 size= get_slice_offset(avctx, slices_hdr, i+1) - offset;
688 if(i+2 >= slice_count)
689 size2= buf_size - offset;
691 size2= get_slice_offset(avctx, slices_hdr, i+2) - offset;
693 if (size <= 0 || size2 <= 0 ||
694 offset + FFMAX(size, size2) > buf_size)
695 return AVERROR_INVALIDDATA;
697 if(rv10_decode_packet(avctx, buf+offset, size, size2) > 8*size)
701 if(s->current_picture_ptr != NULL && s->mb_y>=s->mb_height){
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;
711 if(s->last_picture_ptr || s->low_delay){
712 *data_size = sizeof(AVFrame);
713 ff_print_debug_info(s, pict);
715 s->current_picture_ptr= NULL; //so we can detect if frame_end wasnt called (find some nicer solution...)
721 AVCodec ff_rv10_decoder = {
723 .type = AVMEDIA_TYPE_VIDEO,
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,
731 .long_name = NULL_IF_CONFIG_SMALL("RealVideo 1.0"),
732 .pix_fmts= ff_pixfmt_list_420,
735 AVCodec ff_rv20_decoder = {
737 .type = AVMEDIA_TYPE_VIDEO,
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,
746 .long_name = NULL_IF_CONFIG_SMALL("RealVideo 2.0"),
747 .pix_fmts= ff_pixfmt_list_420,