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"
30 #include "error_resilience.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] = {
49 0x3e7f, 0x0f00, 0x0f01, 0x0f02, 0x0f03, 0x0f04, 0x0f05, 0x0f06,
50 0x0f07, 0x0f08, 0x0f09, 0x0f0a, 0x0f0b, 0x0f0c, 0x0f0d, 0x0f0e,
51 0x0f0f, 0x0f10, 0x0f11, 0x0f12, 0x0f13, 0x0f14, 0x0f15, 0x0f16,
52 0x0f17, 0x0f18, 0x0f19, 0x0f1a, 0x0f1b, 0x0f1c, 0x0f1d, 0x0f1e,
53 0x0f1f, 0x0f20, 0x0f21, 0x0f22, 0x0f23, 0x0f24, 0x0f25, 0x0f26,
54 0x0f27, 0x0f28, 0x0f29, 0x0f2a, 0x0f2b, 0x0f2c, 0x0f2d, 0x0f2e,
55 0x0f2f, 0x0f30, 0x0f31, 0x0f32, 0x0f33, 0x0f34, 0x0f35, 0x0f36,
56 0x0f37, 0x0f38, 0x0f39, 0x0f3a, 0x0f3b, 0x0f3c, 0x0f3d, 0x0f3e,
57 0x0f3f, 0x0380, 0x0381, 0x0382, 0x0383, 0x0384, 0x0385, 0x0386,
58 0x0387, 0x0388, 0x0389, 0x038a, 0x038b, 0x038c, 0x038d, 0x038e,
59 0x038f, 0x0390, 0x0391, 0x0392, 0x0393, 0x0394, 0x0395, 0x0396,
60 0x0397, 0x0398, 0x0399, 0x039a, 0x039b, 0x039c, 0x039d, 0x039e,
61 0x039f, 0x00c0, 0x00c1, 0x00c2, 0x00c3, 0x00c4, 0x00c5, 0x00c6,
62 0x00c7, 0x00c8, 0x00c9, 0x00ca, 0x00cb, 0x00cc, 0x00cd, 0x00ce,
63 0x00cf, 0x0050, 0x0051, 0x0052, 0x0053, 0x0054, 0x0055, 0x0056,
64 0x0057, 0x0020, 0x0021, 0x0022, 0x0023, 0x000c, 0x000d, 0x0004,
65 0x0000, 0x0005, 0x000e, 0x000f, 0x0024, 0x0025, 0x0026, 0x0027,
66 0x0058, 0x0059, 0x005a, 0x005b, 0x005c, 0x005d, 0x005e, 0x005f,
67 0x00d0, 0x00d1, 0x00d2, 0x00d3, 0x00d4, 0x00d5, 0x00d6, 0x00d7,
68 0x00d8, 0x00d9, 0x00da, 0x00db, 0x00dc, 0x00dd, 0x00de, 0x00df,
69 0x03a0, 0x03a1, 0x03a2, 0x03a3, 0x03a4, 0x03a5, 0x03a6, 0x03a7,
70 0x03a8, 0x03a9, 0x03aa, 0x03ab, 0x03ac, 0x03ad, 0x03ae, 0x03af,
71 0x03b0, 0x03b1, 0x03b2, 0x03b3, 0x03b4, 0x03b5, 0x03b6, 0x03b7,
72 0x03b8, 0x03b9, 0x03ba, 0x03bb, 0x03bc, 0x03bd, 0x03be, 0x03bf,
73 0x0f40, 0x0f41, 0x0f42, 0x0f43, 0x0f44, 0x0f45, 0x0f46, 0x0f47,
74 0x0f48, 0x0f49, 0x0f4a, 0x0f4b, 0x0f4c, 0x0f4d, 0x0f4e, 0x0f4f,
75 0x0f50, 0x0f51, 0x0f52, 0x0f53, 0x0f54, 0x0f55, 0x0f56, 0x0f57,
76 0x0f58, 0x0f59, 0x0f5a, 0x0f5b, 0x0f5c, 0x0f5d, 0x0f5e, 0x0f5f,
77 0x0f60, 0x0f61, 0x0f62, 0x0f63, 0x0f64, 0x0f65, 0x0f66, 0x0f67,
78 0x0f68, 0x0f69, 0x0f6a, 0x0f6b, 0x0f6c, 0x0f6d, 0x0f6e, 0x0f6f,
79 0x0f70, 0x0f71, 0x0f72, 0x0f73, 0x0f74, 0x0f75, 0x0f76, 0x0f77,
80 0x0f78, 0x0f79, 0x0f7a, 0x0f7b, 0x0f7c, 0x0f7d, 0x0f7e, 0x0f7f,
83 static const uint8_t rv_lum_bits[256] = {
84 14, 12, 12, 12, 12, 12, 12, 12,
85 12, 12, 12, 12, 12, 12, 12, 12,
86 12, 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, 10, 10, 10, 10, 10, 10, 10,
93 10, 10, 10, 10, 10, 10, 10, 10,
94 10, 10, 10, 10, 10, 10, 10, 10,
95 10, 10, 10, 10, 10, 10, 10, 10,
96 10, 8, 8, 8, 8, 8, 8, 8,
97 8, 8, 8, 8, 8, 8, 8, 8,
98 8, 7, 7, 7, 7, 7, 7, 7,
99 7, 6, 6, 6, 6, 5, 5, 4,
100 2, 4, 5, 5, 6, 6, 6, 6,
101 7, 7, 7, 7, 7, 7, 7, 7,
102 8, 8, 8, 8, 8, 8, 8, 8,
103 8, 8, 8, 8, 8, 8, 8, 8,
104 10, 10, 10, 10, 10, 10, 10, 10,
105 10, 10, 10, 10, 10, 10, 10, 10,
106 10, 10, 10, 10, 10, 10, 10, 10,
107 10, 10, 10, 10, 10, 10, 10, 10,
108 12, 12, 12, 12, 12, 12, 12, 12,
109 12, 12, 12, 12, 12, 12, 12, 12,
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,
118 static const uint16_t rv_chrom_code[256] = {
119 0xfe7f, 0x3f00, 0x3f01, 0x3f02, 0x3f03, 0x3f04, 0x3f05, 0x3f06,
120 0x3f07, 0x3f08, 0x3f09, 0x3f0a, 0x3f0b, 0x3f0c, 0x3f0d, 0x3f0e,
121 0x3f0f, 0x3f10, 0x3f11, 0x3f12, 0x3f13, 0x3f14, 0x3f15, 0x3f16,
122 0x3f17, 0x3f18, 0x3f19, 0x3f1a, 0x3f1b, 0x3f1c, 0x3f1d, 0x3f1e,
123 0x3f1f, 0x3f20, 0x3f21, 0x3f22, 0x3f23, 0x3f24, 0x3f25, 0x3f26,
124 0x3f27, 0x3f28, 0x3f29, 0x3f2a, 0x3f2b, 0x3f2c, 0x3f2d, 0x3f2e,
125 0x3f2f, 0x3f30, 0x3f31, 0x3f32, 0x3f33, 0x3f34, 0x3f35, 0x3f36,
126 0x3f37, 0x3f38, 0x3f39, 0x3f3a, 0x3f3b, 0x3f3c, 0x3f3d, 0x3f3e,
127 0x3f3f, 0x0f80, 0x0f81, 0x0f82, 0x0f83, 0x0f84, 0x0f85, 0x0f86,
128 0x0f87, 0x0f88, 0x0f89, 0x0f8a, 0x0f8b, 0x0f8c, 0x0f8d, 0x0f8e,
129 0x0f8f, 0x0f90, 0x0f91, 0x0f92, 0x0f93, 0x0f94, 0x0f95, 0x0f96,
130 0x0f97, 0x0f98, 0x0f99, 0x0f9a, 0x0f9b, 0x0f9c, 0x0f9d, 0x0f9e,
131 0x0f9f, 0x03c0, 0x03c1, 0x03c2, 0x03c3, 0x03c4, 0x03c5, 0x03c6,
132 0x03c7, 0x03c8, 0x03c9, 0x03ca, 0x03cb, 0x03cc, 0x03cd, 0x03ce,
133 0x03cf, 0x00e0, 0x00e1, 0x00e2, 0x00e3, 0x00e4, 0x00e5, 0x00e6,
134 0x00e7, 0x0030, 0x0031, 0x0032, 0x0033, 0x0008, 0x0009, 0x0002,
135 0x0000, 0x0003, 0x000a, 0x000b, 0x0034, 0x0035, 0x0036, 0x0037,
136 0x00e8, 0x00e9, 0x00ea, 0x00eb, 0x00ec, 0x00ed, 0x00ee, 0x00ef,
137 0x03d0, 0x03d1, 0x03d2, 0x03d3, 0x03d4, 0x03d5, 0x03d6, 0x03d7,
138 0x03d8, 0x03d9, 0x03da, 0x03db, 0x03dc, 0x03dd, 0x03de, 0x03df,
139 0x0fa0, 0x0fa1, 0x0fa2, 0x0fa3, 0x0fa4, 0x0fa5, 0x0fa6, 0x0fa7,
140 0x0fa8, 0x0fa9, 0x0faa, 0x0fab, 0x0fac, 0x0fad, 0x0fae, 0x0faf,
141 0x0fb0, 0x0fb1, 0x0fb2, 0x0fb3, 0x0fb4, 0x0fb5, 0x0fb6, 0x0fb7,
142 0x0fb8, 0x0fb9, 0x0fba, 0x0fbb, 0x0fbc, 0x0fbd, 0x0fbe, 0x0fbf,
143 0x3f40, 0x3f41, 0x3f42, 0x3f43, 0x3f44, 0x3f45, 0x3f46, 0x3f47,
144 0x3f48, 0x3f49, 0x3f4a, 0x3f4b, 0x3f4c, 0x3f4d, 0x3f4e, 0x3f4f,
145 0x3f50, 0x3f51, 0x3f52, 0x3f53, 0x3f54, 0x3f55, 0x3f56, 0x3f57,
146 0x3f58, 0x3f59, 0x3f5a, 0x3f5b, 0x3f5c, 0x3f5d, 0x3f5e, 0x3f5f,
147 0x3f60, 0x3f61, 0x3f62, 0x3f63, 0x3f64, 0x3f65, 0x3f66, 0x3f67,
148 0x3f68, 0x3f69, 0x3f6a, 0x3f6b, 0x3f6c, 0x3f6d, 0x3f6e, 0x3f6f,
149 0x3f70, 0x3f71, 0x3f72, 0x3f73, 0x3f74, 0x3f75, 0x3f76, 0x3f77,
150 0x3f78, 0x3f79, 0x3f7a, 0x3f7b, 0x3f7c, 0x3f7d, 0x3f7e, 0x3f7f,
153 static const uint8_t rv_chrom_bits[256] = {
154 16, 14, 14, 14, 14, 14, 14, 14,
155 14, 14, 14, 14, 14, 14, 14, 14,
156 14, 14, 14, 14, 14, 14, 14, 14,
157 14, 14, 14, 14, 14, 14, 14, 14,
158 14, 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, 12, 12, 12, 12, 12, 12, 12,
163 12, 12, 12, 12, 12, 12, 12, 12,
164 12, 12, 12, 12, 12, 12, 12, 12,
165 12, 12, 12, 12, 12, 12, 12, 12,
166 12, 10, 10, 10, 10, 10, 10, 10,
167 10, 10, 10, 10, 10, 10, 10, 10,
168 10, 8, 8, 8, 8, 8, 8, 8,
169 8, 6, 6, 6, 6, 4, 4, 3,
170 2, 3, 4, 4, 6, 6, 6, 6,
171 8, 8, 8, 8, 8, 8, 8, 8,
172 10, 10, 10, 10, 10, 10, 10, 10,
173 10, 10, 10, 10, 10, 10, 10, 10,
174 12, 12, 12, 12, 12, 12, 12, 12,
175 12, 12, 12, 12, 12, 12, 12, 12,
176 12, 12, 12, 12, 12, 12, 12, 12,
177 12, 12, 12, 12, 12, 12, 12, 12,
178 14, 14, 14, 14, 14, 14, 14, 14,
179 14, 14, 14, 14, 14, 14, 14, 14,
180 14, 14, 14, 14, 14, 14, 14, 14,
181 14, 14, 14, 14, 14, 14, 14, 14,
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,
188 static VLC rv_dc_lum, rv_dc_chrom;
190 int ff_rv_decode_dc(MpegEncContext *s, int n)
195 code = get_vlc2(&s->gb, rv_dc_lum.table, DC_VLC_BITS, 2);
197 /* XXX: I don't understand why they use LONGER codes than
198 necessary. The following code would be completely useless
199 if they had thought about it !!! */
200 code = get_bits(&s->gb, 7);
202 code = (int8_t)(get_bits(&s->gb, 7) + 1);
203 } else if (code == 0x7d) {
204 code = -128 + get_bits(&s->gb, 7);
205 } else if (code == 0x7e) {
206 if (get_bits1(&s->gb) == 0)
207 code = (int8_t)(get_bits(&s->gb, 8) + 1);
209 code = (int8_t)(get_bits(&s->gb, 8));
210 } else if (code == 0x7f) {
211 skip_bits(&s->gb, 11);
218 code = get_vlc2(&s->gb, rv_dc_chrom.table, DC_VLC_BITS, 2);
221 code = get_bits(&s->gb, 9);
223 code = (int8_t)(get_bits(&s->gb, 7) + 1);
224 } else if (code == 0x1fd) {
225 code = -128 + get_bits(&s->gb, 7);
226 } else if (code == 0x1fe) {
227 skip_bits(&s->gb, 9);
230 av_log(s->avctx, AV_LOG_ERROR, "chroma dc error\n");
240 /* read RV 1.0 compatible frame header */
241 static int rv10_decode_picture_header(MpegEncContext *s)
243 int mb_count, pb_frame, marker, mb_xy;
245 marker = get_bits1(&s->gb);
247 if (get_bits1(&s->gb))
248 s->pict_type = AV_PICTURE_TYPE_P;
250 s->pict_type = AV_PICTURE_TYPE_I;
253 av_log(s->avctx, AV_LOG_ERROR, "marker missing\n");
255 pb_frame = get_bits1(&s->gb);
257 av_dlog(s->avctx, "pict_type=%d pb_frame=%d\n", s->pict_type, pb_frame);
260 avpriv_request_sample(s->avctx, "pb frame");
261 return AVERROR_PATCHWELCOME;
264 s->qscale = get_bits(&s->gb, 5);
265 if (s->qscale == 0) {
266 av_log(s->avctx, AV_LOG_ERROR, "Invalid qscale value: 0\n");
267 return AVERROR_INVALIDDATA;
270 if (s->pict_type == AV_PICTURE_TYPE_I) {
271 if (s->rv10_version == 3) {
272 /* specific MPEG like DC coding not used */
273 s->last_dc[0] = get_bits(&s->gb, 8);
274 s->last_dc[1] = get_bits(&s->gb, 8);
275 s->last_dc[2] = get_bits(&s->gb, 8);
276 av_dlog(s->avctx, "DC:%d %d %d\n", s->last_dc[0],
277 s->last_dc[1], s->last_dc[2]);
280 /* if multiple packets per frame are sent, the position at which
281 to display the macroblocks is coded here */
283 mb_xy = s->mb_x + s->mb_y * s->mb_width;
284 if (show_bits(&s->gb, 12) == 0 || (mb_xy && mb_xy < s->mb_num)) {
285 s->mb_x = get_bits(&s->gb, 6); /* mb_x */
286 s->mb_y = get_bits(&s->gb, 6); /* mb_y */
287 mb_count = get_bits(&s->gb, 12);
291 mb_count = s->mb_width * s->mb_height;
293 skip_bits(&s->gb, 3); /* ignored */
295 s->unrestricted_mv = 1;
300 static int rv20_decode_picture_header(RVDecContext *rv)
302 MpegEncContext *s = &rv->m;
303 int seq, mb_pos, i, ret;
306 i = get_bits(&s->gb, 2);
308 case 0: s->pict_type = AV_PICTURE_TYPE_I; break;
309 case 1: s->pict_type = AV_PICTURE_TYPE_I; break; //hmm ...
310 case 2: s->pict_type = AV_PICTURE_TYPE_P; break;
311 case 3: s->pict_type = AV_PICTURE_TYPE_B; break;
313 av_log(s->avctx, AV_LOG_ERROR, "unknown frame type\n");
314 return AVERROR_INVALIDDATA;
317 if (s->last_picture_ptr == NULL && s->pict_type == AV_PICTURE_TYPE_B) {
318 av_log(s->avctx, AV_LOG_ERROR, "early B-frame\n");
319 return AVERROR_INVALIDDATA;
322 if (get_bits1(&s->gb)) {
323 av_log(s->avctx, AV_LOG_ERROR, "reserved bit set\n");
324 return AVERROR_INVALIDDATA;
327 s->qscale = get_bits(&s->gb, 5);
328 if (s->qscale == 0) {
329 av_log(s->avctx, AV_LOG_ERROR, "Invalid qscale value: 0\n");
330 return AVERROR_INVALIDDATA;
333 if (RV_GET_MINOR_VER(rv->sub_id) >= 2)
334 s->loop_filter = get_bits1(&s->gb);
336 if (RV_GET_MINOR_VER(rv->sub_id) <= 1)
337 seq = get_bits(&s->gb, 8) << 7;
339 seq = get_bits(&s->gb, 13) << 2;
341 rpr_bits = s->avctx->extradata[1] & 7;
344 rpr_bits = FFMIN((rpr_bits >> 1) + 1, 3);
346 f = get_bits(&s->gb, rpr_bits);
349 if (s->avctx->extradata_size < 8 + 2 * f) {
350 av_log(s->avctx, AV_LOG_ERROR, "Extradata too small.\n");
351 return AVERROR_INVALIDDATA;
354 new_w = 4 * ((uint8_t*)s->avctx->extradata)[6 + 2 * f];
355 new_h = 4 * ((uint8_t*)s->avctx->extradata)[7 + 2 * f];
357 new_w = s->orig_width ;
358 new_h = s->orig_height;
360 if (new_w != s->width || new_h != s->height) {
361 av_log(s->avctx, AV_LOG_DEBUG,
362 "attempting to change resolution to %dx%d\n", new_w, new_h);
363 if (av_image_check_size(new_w, new_h, 0, s->avctx) < 0)
364 return AVERROR_INVALIDDATA;
365 ff_MPV_common_end(s);
366 avcodec_set_dimensions(s->avctx, new_w, new_h);
369 if ((ret = ff_MPV_common_init(s)) < 0)
373 if (s->avctx->debug & FF_DEBUG_PICT_INFO) {
374 av_log(s->avctx, AV_LOG_DEBUG, "F %d/%d\n", f, rpr_bits);
376 } else if (av_image_check_size(s->width, s->height, 0, s->avctx) < 0)
377 return AVERROR_INVALIDDATA;
379 mb_pos = ff_h263_decode_mba(s);
381 seq |= s->time & ~0x7FFF;
382 if (seq - s->time > 0x4000)
384 if (seq - s->time < -0x4000)
387 if (seq != s->time) {
388 if (s->pict_type != AV_PICTURE_TYPE_B) {
390 s->pp_time = s->time - s->last_non_b_time;
391 s->last_non_b_time = s->time;
394 s->pb_time = s->pp_time - (s->last_non_b_time - s->time);
395 if (s->pp_time <= s->pb_time ||
396 s->pp_time <= s->pp_time - s->pb_time || s->pp_time <= 0) {
397 av_log(s->avctx, AV_LOG_DEBUG, "messed up order, possible "
398 "from seeking? skipping current b frame\n");
399 return FRAME_SKIPPED;
401 ff_mpeg4_init_direct_mv(s);
405 s->no_rounding = get_bits1(&s->gb);
407 if (RV_GET_MINOR_VER(rv->sub_id) <= 1 && s->pict_type == AV_PICTURE_TYPE_B)
408 skip_bits(&s->gb, 5); // binary decoder reads 3+2 bits here but they don't seem to be used
411 s->unrestricted_mv = 1;
412 s->h263_aic = s->pict_type == AV_PICTURE_TYPE_I;
413 s->modified_quant = 1;
416 if (s->avctx->debug & FF_DEBUG_PICT_INFO) {
417 av_log(s->avctx, AV_LOG_INFO, "num:%5d x:%2d y:%2d type:%d qscale:%2d rnd:%d\n",
418 seq, s->mb_x, s->mb_y, s->pict_type, s->qscale, s->no_rounding);
421 assert(s->pict_type != AV_PICTURE_TYPE_B || !s->low_delay);
423 return s->mb_width*s->mb_height - mb_pos;
426 static av_cold int rv10_decode_init(AVCodecContext *avctx)
428 RVDecContext *rv = avctx->priv_data;
429 MpegEncContext *s = &rv->m;
431 int major_ver, minor_ver, micro_ver, ret;
433 if (avctx->extradata_size < 8) {
434 av_log(avctx, AV_LOG_ERROR, "Extradata is too small.\n");
435 return AVERROR_INVALIDDATA;
438 ff_MPV_decode_defaults(s);
441 s->out_format = FMT_H263;
442 s->codec_id = avctx->codec_id;
443 avctx->flags |= CODEC_FLAG_EMU_EDGE;
445 s->orig_width = s->width = avctx->coded_width;
446 s->orig_height = s->height = avctx->coded_height;
448 s->h263_long_vectors = ((uint8_t*)avctx->extradata)[3] & 1;
449 rv->sub_id = AV_RB32((uint8_t*)avctx->extradata + 4);
451 major_ver = RV_GET_MAJOR_VER(rv->sub_id);
452 minor_ver = RV_GET_MINOR_VER(rv->sub_id);
453 micro_ver = RV_GET_MICRO_VER(rv->sub_id);
458 s->rv10_version = micro_ver ? 3 : 1;
459 s->obmc = micro_ver == 2;
462 if (minor_ver >= 2) {
464 s->avctx->has_b_frames = 1;
468 av_log(s->avctx, AV_LOG_ERROR, "unknown header %X\n", rv->sub_id);
469 avpriv_request_sample(avctx, "RV1/2 version");
470 return AVERROR_PATCHWELCOME;
473 if (avctx->debug & FF_DEBUG_PICT_INFO) {
474 av_log(avctx, AV_LOG_DEBUG, "ver:%X ver0:%X\n", rv->sub_id,
475 avctx->extradata_size >= 4 ? ((uint32_t*)avctx->extradata)[0] : -1);
478 avctx->pix_fmt = AV_PIX_FMT_YUV420P;
480 if ((ret = ff_MPV_common_init(s)) < 0)
483 ff_h263_decode_init_vlc();
487 INIT_VLC_STATIC(&rv_dc_lum, DC_VLC_BITS, 256,
489 rv_lum_code, 2, 2, 16384);
490 INIT_VLC_STATIC(&rv_dc_chrom, DC_VLC_BITS, 256,
492 rv_chrom_code, 2, 2, 16388);
499 static av_cold int rv10_decode_end(AVCodecContext *avctx)
501 MpegEncContext *s = avctx->priv_data;
503 ff_MPV_common_end(s);
507 static int rv10_decode_packet(AVCodecContext *avctx,
508 const uint8_t *buf, int buf_size, int buf_size2)
510 RVDecContext *rv = avctx->priv_data;
511 MpegEncContext *s = &rv->m;
512 int mb_count, mb_pos, left, start_mb_x, active_bits_size, ret;
514 active_bits_size = buf_size * 8;
515 init_get_bits(&s->gb, buf, FFMAX(buf_size, buf_size2) * 8);
516 if (s->codec_id == AV_CODEC_ID_RV10)
517 mb_count = rv10_decode_picture_header(s);
519 mb_count = rv20_decode_picture_header(rv);
521 av_log(s->avctx, AV_LOG_ERROR, "HEADER ERROR\n");
522 return AVERROR_INVALIDDATA;
525 if (s->mb_x >= s->mb_width ||
526 s->mb_y >= s->mb_height) {
527 av_log(s->avctx, AV_LOG_ERROR, "POS ERROR %d %d\n", s->mb_x, s->mb_y);
528 return AVERROR_INVALIDDATA;
530 mb_pos = s->mb_y * s->mb_width + s->mb_x;
531 left = s->mb_width * s->mb_height - mb_pos;
532 if (mb_count > left) {
533 av_log(s->avctx, AV_LOG_ERROR, "COUNT ERROR\n");
534 return AVERROR_INVALIDDATA;
537 if ((s->mb_x == 0 && s->mb_y == 0) || s->current_picture_ptr == NULL) {
538 if (s->current_picture_ptr) { // FIXME write parser so we always have complete frames?
539 ff_er_frame_end(&s->er);
541 s->mb_x = s->mb_y = s->resync_mb_x = s->resync_mb_y = 0;
543 if ((ret = ff_MPV_frame_start(s, avctx)) < 0)
545 ff_mpeg_er_frame_start(s);
547 if (s->current_picture_ptr->f.pict_type != s->pict_type) {
548 av_log(s->avctx, AV_LOG_ERROR, "Slice type mismatch\n");
549 return AVERROR_INVALIDDATA;
553 av_dlog(avctx, "qscale=%d\n", s->qscale);
555 /* default quantization values */
556 if (s->codec_id == AV_CODEC_ID_RV10) {
558 s->first_slice_line = 1;
560 s->first_slice_line = 1;
561 s->resync_mb_x = s->mb_x;
563 start_mb_x = s->mb_x;
564 s->resync_mb_y = s->mb_y;
566 s->y_dc_scale_table = s->c_dc_scale_table = ff_aic_dc_scale_table;
568 s->y_dc_scale_table = s->c_dc_scale_table = ff_mpeg1_dc_scale_table;
571 if (s->modified_quant)
572 s->chroma_qscale_table = ff_h263_chroma_qscale_table;
574 ff_set_qscale(s, s->qscale);
576 s->rv10_first_dc_coded[0] = 0;
577 s->rv10_first_dc_coded[1] = 0;
578 s->rv10_first_dc_coded[2] = 0;
582 s->block_wrap[3] = s->b8_stride;
584 s->block_wrap[5] = s->mb_stride;
585 ff_init_block_index(s);
587 /* decode each macroblock */
588 for (s->mb_num_left = mb_count; s->mb_num_left > 0; s->mb_num_left--) {
590 ff_update_block_index(s);
591 av_dlog(avctx, "**mb x=%d y=%d\n", s->mb_x, s->mb_y);
593 s->mv_dir = MV_DIR_FORWARD;
594 s->mv_type = MV_TYPE_16X16;
595 ret = ff_h263_decode_mb(s, s->block);
597 // Repeat the slice end check from ff_h263_decode_mb with our active
599 if (ret != SLICE_ERROR) {
600 int v = show_bits(&s->gb, 16);
602 if (get_bits_count(&s->gb) + 16 > active_bits_size)
603 v >>= get_bits_count(&s->gb) + 16 - active_bits_size;
608 if (ret != SLICE_ERROR && active_bits_size < get_bits_count(&s->gb) &&
609 8 * buf_size2 >= get_bits_count(&s->gb)) {
610 active_bits_size = buf_size2 * 8;
611 av_log(avctx, AV_LOG_DEBUG, "update size from %d to %d\n",
612 8 * buf_size, active_bits_size);
616 if (ret == SLICE_ERROR || active_bits_size < get_bits_count(&s->gb)) {
617 av_log(s->avctx, AV_LOG_ERROR, "ERROR at MB %d %d\n", s->mb_x, s->mb_y);
618 return AVERROR_INVALIDDATA;
620 if (s->pict_type != AV_PICTURE_TYPE_B)
621 ff_h263_update_motion_val(s);
622 ff_MPV_decode_mb(s, s->block);
624 ff_h263_loop_filter(s);
626 if (++s->mb_x == s->mb_width) {
629 ff_init_block_index(s);
631 if (s->mb_x == s->resync_mb_x)
632 s->first_slice_line = 0;
633 if (ret == SLICE_END)
637 ff_er_add_slice(&s->er, start_mb_x, s->resync_mb_y, s->mb_x-1, s->mb_y,
640 return active_bits_size;
643 static int get_slice_offset(AVCodecContext *avctx, const uint8_t *buf, int n)
645 if (avctx->slice_count)
646 return avctx->slice_offset[n];
648 return AV_RL32(buf + n * 8);
651 static int rv10_decode_frame(AVCodecContext *avctx,
652 void *data, int *got_frame,
655 const uint8_t *buf = avpkt->data;
656 int buf_size = avpkt->size;
657 MpegEncContext *s = avctx->priv_data;
658 AVFrame *pict = data;
661 const uint8_t *slices_hdr = NULL;
663 av_dlog(avctx, "*****frame %d size=%d\n", avctx->frame_number, buf_size);
665 /* no supplementary picture */
670 if (!avctx->slice_count) {
671 slice_count = (*buf++) + 1;
674 if (!slice_count || buf_size <= 8 * slice_count) {
675 av_log(avctx, AV_LOG_ERROR, "Invalid slice count: %d.\n", slice_count);
676 return AVERROR_INVALIDDATA;
679 slices_hdr = buf + 4;
680 buf += 8 * slice_count;
681 buf_size -= 8 * slice_count;
683 slice_count = avctx->slice_count;
685 for (i = 0; i < slice_count; i++) {
686 unsigned offset = get_slice_offset(avctx, slices_hdr, i);
689 if (offset >= buf_size)
690 return AVERROR_INVALIDDATA;
692 if (i + 1 == slice_count)
693 size = buf_size - offset;
695 size = get_slice_offset(avctx, slices_hdr, i + 1) - offset;
697 if (i + 2 >= slice_count)
698 size2 = buf_size - offset;
700 size2 = get_slice_offset(avctx, slices_hdr, i + 2) - offset;
702 if (size <= 0 || size2 <= 0 ||
703 offset + FFMAX(size, size2) > buf_size)
704 return AVERROR_INVALIDDATA;
706 if (rv10_decode_packet(avctx, buf + offset, size, size2) > 8 * size)
710 if (s->current_picture_ptr != NULL && s->mb_y >= s->mb_height) {
711 ff_er_frame_end(&s->er);
714 if (s->pict_type == AV_PICTURE_TYPE_B || s->low_delay) {
715 if ((ret = av_frame_ref(pict, &s->current_picture_ptr->f)) < 0)
717 ff_print_debug_info(s, s->current_picture_ptr);
718 } else if (s->last_picture_ptr != NULL) {
719 if ((ret = av_frame_ref(pict, &s->last_picture_ptr->f)) < 0)
721 ff_print_debug_info(s, s->last_picture_ptr);
724 if (s->last_picture_ptr || s->low_delay) {
728 // so we can detect if frame_end was not called (find some nicer solution...)
729 s->current_picture_ptr = NULL;
735 AVCodec ff_rv10_decoder = {
737 .type = AVMEDIA_TYPE_VIDEO,
738 .id = AV_CODEC_ID_RV10,
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,
744 .long_name = NULL_IF_CONFIG_SMALL("RealVideo 1.0"),
745 .pix_fmts = ff_pixfmt_list_420,
748 AVCodec ff_rv20_decoder = {
750 .type = AVMEDIA_TYPE_VIDEO,
751 .id = AV_CODEC_ID_RV20,
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 | CODEC_CAP_DELAY,
757 .flush = ff_mpeg_flush,
758 .long_name = NULL_IF_CONFIG_SMALL("RealVideo 2.0"),
759 .pix_fmts = ff_pixfmt_list_420,