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"
30 #include "error_resilience.h"
32 #include "mpegvideo.h"
33 #include "mpeg4video.h"
36 #define RV_GET_MAJOR_VER(x) ((x) >> 28)
37 #define RV_GET_MINOR_VER(x) (((x) >> 20) & 0xFF)
38 #define RV_GET_MICRO_VER(x) (((x) >> 12) & 0xFF)
40 #define DC_VLC_BITS 14 //FIXME find a better solution
42 typedef struct RVDecContext {
47 static const uint16_t rv_lum_code[256] = {
48 0x3e7f, 0x0f00, 0x0f01, 0x0f02, 0x0f03, 0x0f04, 0x0f05, 0x0f06,
49 0x0f07, 0x0f08, 0x0f09, 0x0f0a, 0x0f0b, 0x0f0c, 0x0f0d, 0x0f0e,
50 0x0f0f, 0x0f10, 0x0f11, 0x0f12, 0x0f13, 0x0f14, 0x0f15, 0x0f16,
51 0x0f17, 0x0f18, 0x0f19, 0x0f1a, 0x0f1b, 0x0f1c, 0x0f1d, 0x0f1e,
52 0x0f1f, 0x0f20, 0x0f21, 0x0f22, 0x0f23, 0x0f24, 0x0f25, 0x0f26,
53 0x0f27, 0x0f28, 0x0f29, 0x0f2a, 0x0f2b, 0x0f2c, 0x0f2d, 0x0f2e,
54 0x0f2f, 0x0f30, 0x0f31, 0x0f32, 0x0f33, 0x0f34, 0x0f35, 0x0f36,
55 0x0f37, 0x0f38, 0x0f39, 0x0f3a, 0x0f3b, 0x0f3c, 0x0f3d, 0x0f3e,
56 0x0f3f, 0x0380, 0x0381, 0x0382, 0x0383, 0x0384, 0x0385, 0x0386,
57 0x0387, 0x0388, 0x0389, 0x038a, 0x038b, 0x038c, 0x038d, 0x038e,
58 0x038f, 0x0390, 0x0391, 0x0392, 0x0393, 0x0394, 0x0395, 0x0396,
59 0x0397, 0x0398, 0x0399, 0x039a, 0x039b, 0x039c, 0x039d, 0x039e,
60 0x039f, 0x00c0, 0x00c1, 0x00c2, 0x00c3, 0x00c4, 0x00c5, 0x00c6,
61 0x00c7, 0x00c8, 0x00c9, 0x00ca, 0x00cb, 0x00cc, 0x00cd, 0x00ce,
62 0x00cf, 0x0050, 0x0051, 0x0052, 0x0053, 0x0054, 0x0055, 0x0056,
63 0x0057, 0x0020, 0x0021, 0x0022, 0x0023, 0x000c, 0x000d, 0x0004,
64 0x0000, 0x0005, 0x000e, 0x000f, 0x0024, 0x0025, 0x0026, 0x0027,
65 0x0058, 0x0059, 0x005a, 0x005b, 0x005c, 0x005d, 0x005e, 0x005f,
66 0x00d0, 0x00d1, 0x00d2, 0x00d3, 0x00d4, 0x00d5, 0x00d6, 0x00d7,
67 0x00d8, 0x00d9, 0x00da, 0x00db, 0x00dc, 0x00dd, 0x00de, 0x00df,
68 0x03a0, 0x03a1, 0x03a2, 0x03a3, 0x03a4, 0x03a5, 0x03a6, 0x03a7,
69 0x03a8, 0x03a9, 0x03aa, 0x03ab, 0x03ac, 0x03ad, 0x03ae, 0x03af,
70 0x03b0, 0x03b1, 0x03b2, 0x03b3, 0x03b4, 0x03b5, 0x03b6, 0x03b7,
71 0x03b8, 0x03b9, 0x03ba, 0x03bb, 0x03bc, 0x03bd, 0x03be, 0x03bf,
72 0x0f40, 0x0f41, 0x0f42, 0x0f43, 0x0f44, 0x0f45, 0x0f46, 0x0f47,
73 0x0f48, 0x0f49, 0x0f4a, 0x0f4b, 0x0f4c, 0x0f4d, 0x0f4e, 0x0f4f,
74 0x0f50, 0x0f51, 0x0f52, 0x0f53, 0x0f54, 0x0f55, 0x0f56, 0x0f57,
75 0x0f58, 0x0f59, 0x0f5a, 0x0f5b, 0x0f5c, 0x0f5d, 0x0f5e, 0x0f5f,
76 0x0f60, 0x0f61, 0x0f62, 0x0f63, 0x0f64, 0x0f65, 0x0f66, 0x0f67,
77 0x0f68, 0x0f69, 0x0f6a, 0x0f6b, 0x0f6c, 0x0f6d, 0x0f6e, 0x0f6f,
78 0x0f70, 0x0f71, 0x0f72, 0x0f73, 0x0f74, 0x0f75, 0x0f76, 0x0f77,
79 0x0f78, 0x0f79, 0x0f7a, 0x0f7b, 0x0f7c, 0x0f7d, 0x0f7e, 0x0f7f,
82 static const uint8_t rv_lum_bits[256] = {
83 14, 12, 12, 12, 12, 12, 12, 12,
84 12, 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, 10, 10, 10, 10, 10, 10, 10,
92 10, 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, 8, 8, 8, 8, 8, 8, 8,
96 8, 8, 8, 8, 8, 8, 8, 8,
97 8, 7, 7, 7, 7, 7, 7, 7,
98 7, 6, 6, 6, 6, 5, 5, 4,
99 2, 4, 5, 5, 6, 6, 6, 6,
100 7, 7, 7, 7, 7, 7, 7, 7,
101 8, 8, 8, 8, 8, 8, 8, 8,
102 8, 8, 8, 8, 8, 8, 8, 8,
103 10, 10, 10, 10, 10, 10, 10, 10,
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 12, 12, 12, 12, 12, 12, 12, 12,
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,
117 static const uint16_t rv_chrom_code[256] = {
118 0xfe7f, 0x3f00, 0x3f01, 0x3f02, 0x3f03, 0x3f04, 0x3f05, 0x3f06,
119 0x3f07, 0x3f08, 0x3f09, 0x3f0a, 0x3f0b, 0x3f0c, 0x3f0d, 0x3f0e,
120 0x3f0f, 0x3f10, 0x3f11, 0x3f12, 0x3f13, 0x3f14, 0x3f15, 0x3f16,
121 0x3f17, 0x3f18, 0x3f19, 0x3f1a, 0x3f1b, 0x3f1c, 0x3f1d, 0x3f1e,
122 0x3f1f, 0x3f20, 0x3f21, 0x3f22, 0x3f23, 0x3f24, 0x3f25, 0x3f26,
123 0x3f27, 0x3f28, 0x3f29, 0x3f2a, 0x3f2b, 0x3f2c, 0x3f2d, 0x3f2e,
124 0x3f2f, 0x3f30, 0x3f31, 0x3f32, 0x3f33, 0x3f34, 0x3f35, 0x3f36,
125 0x3f37, 0x3f38, 0x3f39, 0x3f3a, 0x3f3b, 0x3f3c, 0x3f3d, 0x3f3e,
126 0x3f3f, 0x0f80, 0x0f81, 0x0f82, 0x0f83, 0x0f84, 0x0f85, 0x0f86,
127 0x0f87, 0x0f88, 0x0f89, 0x0f8a, 0x0f8b, 0x0f8c, 0x0f8d, 0x0f8e,
128 0x0f8f, 0x0f90, 0x0f91, 0x0f92, 0x0f93, 0x0f94, 0x0f95, 0x0f96,
129 0x0f97, 0x0f98, 0x0f99, 0x0f9a, 0x0f9b, 0x0f9c, 0x0f9d, 0x0f9e,
130 0x0f9f, 0x03c0, 0x03c1, 0x03c2, 0x03c3, 0x03c4, 0x03c5, 0x03c6,
131 0x03c7, 0x03c8, 0x03c9, 0x03ca, 0x03cb, 0x03cc, 0x03cd, 0x03ce,
132 0x03cf, 0x00e0, 0x00e1, 0x00e2, 0x00e3, 0x00e4, 0x00e5, 0x00e6,
133 0x00e7, 0x0030, 0x0031, 0x0032, 0x0033, 0x0008, 0x0009, 0x0002,
134 0x0000, 0x0003, 0x000a, 0x000b, 0x0034, 0x0035, 0x0036, 0x0037,
135 0x00e8, 0x00e9, 0x00ea, 0x00eb, 0x00ec, 0x00ed, 0x00ee, 0x00ef,
136 0x03d0, 0x03d1, 0x03d2, 0x03d3, 0x03d4, 0x03d5, 0x03d6, 0x03d7,
137 0x03d8, 0x03d9, 0x03da, 0x03db, 0x03dc, 0x03dd, 0x03de, 0x03df,
138 0x0fa0, 0x0fa1, 0x0fa2, 0x0fa3, 0x0fa4, 0x0fa5, 0x0fa6, 0x0fa7,
139 0x0fa8, 0x0fa9, 0x0faa, 0x0fab, 0x0fac, 0x0fad, 0x0fae, 0x0faf,
140 0x0fb0, 0x0fb1, 0x0fb2, 0x0fb3, 0x0fb4, 0x0fb5, 0x0fb6, 0x0fb7,
141 0x0fb8, 0x0fb9, 0x0fba, 0x0fbb, 0x0fbc, 0x0fbd, 0x0fbe, 0x0fbf,
142 0x3f40, 0x3f41, 0x3f42, 0x3f43, 0x3f44, 0x3f45, 0x3f46, 0x3f47,
143 0x3f48, 0x3f49, 0x3f4a, 0x3f4b, 0x3f4c, 0x3f4d, 0x3f4e, 0x3f4f,
144 0x3f50, 0x3f51, 0x3f52, 0x3f53, 0x3f54, 0x3f55, 0x3f56, 0x3f57,
145 0x3f58, 0x3f59, 0x3f5a, 0x3f5b, 0x3f5c, 0x3f5d, 0x3f5e, 0x3f5f,
146 0x3f60, 0x3f61, 0x3f62, 0x3f63, 0x3f64, 0x3f65, 0x3f66, 0x3f67,
147 0x3f68, 0x3f69, 0x3f6a, 0x3f6b, 0x3f6c, 0x3f6d, 0x3f6e, 0x3f6f,
148 0x3f70, 0x3f71, 0x3f72, 0x3f73, 0x3f74, 0x3f75, 0x3f76, 0x3f77,
149 0x3f78, 0x3f79, 0x3f7a, 0x3f7b, 0x3f7c, 0x3f7d, 0x3f7e, 0x3f7f,
152 static const uint8_t rv_chrom_bits[256] = {
153 16, 14, 14, 14, 14, 14, 14, 14,
154 14, 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, 12, 12, 12, 12, 12, 12, 12,
162 12, 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, 10, 10, 10, 10, 10, 10, 10,
166 10, 10, 10, 10, 10, 10, 10, 10,
167 10, 8, 8, 8, 8, 8, 8, 8,
168 8, 6, 6, 6, 6, 4, 4, 3,
169 2, 3, 4, 4, 6, 6, 6, 6,
170 8, 8, 8, 8, 8, 8, 8, 8,
171 10, 10, 10, 10, 10, 10, 10, 10,
172 10, 10, 10, 10, 10, 10, 10, 10,
173 12, 12, 12, 12, 12, 12, 12, 12,
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 14, 14, 14, 14, 14, 14, 14, 14,
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,
187 static VLC rv_dc_lum, rv_dc_chrom;
189 int ff_rv_decode_dc(MpegEncContext *s, int n)
194 code = get_vlc2(&s->gb, rv_dc_lum.table, DC_VLC_BITS, 2);
196 /* XXX: I don't understand why they use LONGER codes than
197 necessary. The following code would be completely useless
198 if they had thought about it !!! */
199 code = get_bits(&s->gb, 7);
201 code = (int8_t)(get_bits(&s->gb, 7) + 1);
202 } else if (code == 0x7d) {
203 code = -128 + get_bits(&s->gb, 7);
204 } else if (code == 0x7e) {
205 if (get_bits1(&s->gb) == 0)
206 code = (int8_t)(get_bits(&s->gb, 8) + 1);
208 code = (int8_t)(get_bits(&s->gb, 8));
209 } else if (code == 0x7f) {
210 skip_bits(&s->gb, 11);
217 code = get_vlc2(&s->gb, rv_dc_chrom.table, DC_VLC_BITS, 2);
220 code = get_bits(&s->gb, 9);
222 code = (int8_t)(get_bits(&s->gb, 7) + 1);
223 } else if (code == 0x1fd) {
224 code = -128 + get_bits(&s->gb, 7);
225 } else if (code == 0x1fe) {
226 skip_bits(&s->gb, 9);
229 av_log(s->avctx, AV_LOG_ERROR, "chroma dc error\n");
239 /* read RV 1.0 compatible frame header */
240 static int rv10_decode_picture_header(MpegEncContext *s)
242 int mb_count, pb_frame, marker, mb_xy;
244 marker = get_bits1(&s->gb);
246 if (get_bits1(&s->gb))
247 s->pict_type = AV_PICTURE_TYPE_P;
249 s->pict_type = AV_PICTURE_TYPE_I;
252 av_log(s->avctx, AV_LOG_ERROR, "marker missing\n");
254 pb_frame = get_bits1(&s->gb);
256 av_dlog(s->avctx, "pict_type=%d pb_frame=%d\n", s->pict_type, pb_frame);
259 avpriv_request_sample(s->avctx, "pb frame");
260 return AVERROR_PATCHWELCOME;
263 s->qscale = get_bits(&s->gb, 5);
264 if (s->qscale == 0) {
265 av_log(s->avctx, AV_LOG_ERROR, "Invalid qscale value: 0\n");
266 return AVERROR_INVALIDDATA;
269 if (s->pict_type == AV_PICTURE_TYPE_I) {
270 if (s->rv10_version == 3) {
271 /* specific MPEG like DC coding not used */
272 s->last_dc[0] = get_bits(&s->gb, 8);
273 s->last_dc[1] = get_bits(&s->gb, 8);
274 s->last_dc[2] = get_bits(&s->gb, 8);
275 av_dlog(s->avctx, "DC:%d %d %d\n", s->last_dc[0],
276 s->last_dc[1], s->last_dc[2]);
279 /* if multiple packets per frame are sent, the position at which
280 to display the macroblocks is coded here */
282 mb_xy = s->mb_x + s->mb_y * s->mb_width;
283 if (show_bits(&s->gb, 12) == 0 || (mb_xy && mb_xy < s->mb_num)) {
284 s->mb_x = get_bits(&s->gb, 6); /* mb_x */
285 s->mb_y = get_bits(&s->gb, 6); /* mb_y */
286 mb_count = get_bits(&s->gb, 12);
290 mb_count = s->mb_width * s->mb_height;
292 skip_bits(&s->gb, 3); /* ignored */
294 s->unrestricted_mv = 1;
299 static int rv20_decode_picture_header(RVDecContext *rv)
301 MpegEncContext *s = &rv->m;
302 int seq, mb_pos, i, ret;
305 i = get_bits(&s->gb, 2);
307 case 0: s->pict_type = AV_PICTURE_TYPE_I; break;
308 case 1: s->pict_type = AV_PICTURE_TYPE_I; break; //hmm ...
309 case 2: s->pict_type = AV_PICTURE_TYPE_P; break;
310 case 3: s->pict_type = AV_PICTURE_TYPE_B; break;
312 av_log(s->avctx, AV_LOG_ERROR, "unknown frame type\n");
313 return AVERROR_INVALIDDATA;
316 if (s->low_delay && s->pict_type == AV_PICTURE_TYPE_B) {
317 av_log(s->avctx, AV_LOG_ERROR, "low delay B\n");
320 if (s->last_picture_ptr == NULL && s->pict_type == AV_PICTURE_TYPE_B) {
321 av_log(s->avctx, AV_LOG_ERROR, "early B-frame\n");
322 return AVERROR_INVALIDDATA;
325 if (get_bits1(&s->gb)) {
326 av_log(s->avctx, AV_LOG_ERROR, "reserved bit set\n");
327 return AVERROR_INVALIDDATA;
330 s->qscale = get_bits(&s->gb, 5);
331 if (s->qscale == 0) {
332 av_log(s->avctx, AV_LOG_ERROR, "Invalid qscale value: 0\n");
333 return AVERROR_INVALIDDATA;
336 if (RV_GET_MINOR_VER(rv->sub_id) >= 2)
337 s->loop_filter = get_bits1(&s->gb) && !s->avctx->lowres;
339 if (RV_GET_MINOR_VER(rv->sub_id) <= 1)
340 seq = get_bits(&s->gb, 8) << 7;
342 seq = get_bits(&s->gb, 13) << 2;
344 rpr_bits = s->avctx->extradata[1] & 7;
347 rpr_bits = FFMIN((rpr_bits >> 1) + 1, 3);
349 f = get_bits(&s->gb, rpr_bits);
352 if (s->avctx->extradata_size < 8 + 2 * f) {
353 av_log(s->avctx, AV_LOG_ERROR, "Extradata too small.\n");
354 return AVERROR_INVALIDDATA;
357 new_w = 4 * ((uint8_t*)s->avctx->extradata)[6 + 2 * f];
358 new_h = 4 * ((uint8_t*)s->avctx->extradata)[7 + 2 * f];
360 new_w = s->orig_width ;
361 new_h = s->orig_height;
363 if (new_w != s->width || new_h != s->height) {
364 AVRational old_aspect = s->avctx->sample_aspect_ratio;
365 av_log(s->avctx, AV_LOG_DEBUG,
366 "attempting to change resolution to %dx%d\n", new_w, new_h);
367 ff_MPV_common_end(s);
369 // attempt to keep aspect during typical resolution switches
371 old_aspect = (AVRational){1, 1};
372 if (2 * new_w * s->height == new_h * s->width)
373 s->avctx->sample_aspect_ratio = av_mul_q(old_aspect, (AVRational){2, 1});
374 if (new_w * s->height == 2 * new_h * s->width)
375 s->avctx->sample_aspect_ratio = av_mul_q(old_aspect, (AVRational){1, 2});
377 ret = ff_set_dimensions(s->avctx, new_w, new_h);
383 if ((ret = ff_MPV_common_init(s)) < 0)
387 if (s->avctx->debug & FF_DEBUG_PICT_INFO) {
388 av_log(s->avctx, AV_LOG_DEBUG, "F %d/%d\n", f, rpr_bits);
391 if (av_image_check_size(s->width, s->height, 0, s->avctx) < 0)
392 return AVERROR_INVALIDDATA;
394 mb_pos = ff_h263_decode_mba(s);
396 seq |= s->time & ~0x7FFF;
397 if (seq - s->time > 0x4000)
399 if (seq - s->time < -0x4000)
402 if (seq != s->time) {
403 if (s->pict_type != AV_PICTURE_TYPE_B) {
405 s->pp_time = s->time - s->last_non_b_time;
406 s->last_non_b_time = s->time;
409 s->pb_time = s->pp_time - (s->last_non_b_time - s->time);
412 if (s->pict_type == AV_PICTURE_TYPE_B) {
413 if (s->pp_time <=s->pb_time || s->pp_time <= s->pp_time - s->pb_time || s->pp_time<=0) {
414 av_log(s->avctx, AV_LOG_DEBUG,
415 "messed up order, possible from seeking? skipping current b frame\n");
416 #define ERROR_SKIP_FRAME -123
417 return ERROR_SKIP_FRAME;
419 ff_mpeg4_init_direct_mv(s);
422 s->no_rounding = get_bits1(&s->gb);
424 if (RV_GET_MINOR_VER(rv->sub_id) <= 1 && s->pict_type == AV_PICTURE_TYPE_B)
425 skip_bits(&s->gb, 5); // binary decoder reads 3+2 bits here but they don't seem to be used
428 s->unrestricted_mv = 1;
429 s->h263_aic = s->pict_type == AV_PICTURE_TYPE_I;
430 s->modified_quant = 1;
431 if (!s->avctx->lowres)
434 if (s->avctx->debug & FF_DEBUG_PICT_INFO) {
435 av_log(s->avctx, AV_LOG_INFO, "num:%5d x:%2d y:%2d type:%d qscale:%2d rnd:%d\n",
436 seq, s->mb_x, s->mb_y, s->pict_type, s->qscale, s->no_rounding);
439 av_assert0(s->pict_type != AV_PICTURE_TYPE_B || !s->low_delay);
441 return s->mb_width*s->mb_height - mb_pos;
444 static av_cold int rv10_decode_init(AVCodecContext *avctx)
446 RVDecContext *rv = avctx->priv_data;
447 MpegEncContext *s = &rv->m;
449 int major_ver, minor_ver, micro_ver, ret;
451 if (avctx->extradata_size < 8) {
452 av_log(avctx, AV_LOG_ERROR, "Extradata is too small.\n");
453 return AVERROR_INVALIDDATA;
455 if ((ret = av_image_check_size(avctx->coded_width,
456 avctx->coded_height, 0, avctx)) < 0)
459 ff_MPV_decode_defaults(s);
462 s->out_format = FMT_H263;
463 s->codec_id = avctx->codec_id;
465 s->orig_width = s->width = avctx->coded_width;
466 s->orig_height = s->height = avctx->coded_height;
468 s->h263_long_vectors = ((uint8_t*)avctx->extradata)[3] & 1;
469 rv->sub_id = AV_RB32((uint8_t*)avctx->extradata + 4);
471 major_ver = RV_GET_MAJOR_VER(rv->sub_id);
472 minor_ver = RV_GET_MINOR_VER(rv->sub_id);
473 micro_ver = RV_GET_MICRO_VER(rv->sub_id);
478 s->rv10_version = micro_ver ? 3 : 1;
479 s->obmc = micro_ver == 2;
482 if (minor_ver >= 2) {
484 s->avctx->has_b_frames = 1;
488 av_log(s->avctx, AV_LOG_ERROR, "unknown header %X\n", rv->sub_id);
489 avpriv_request_sample(avctx, "RV1/2 version");
490 return AVERROR_PATCHWELCOME;
493 if (avctx->debug & FF_DEBUG_PICT_INFO) {
494 av_log(avctx, AV_LOG_DEBUG, "ver:%X ver0:%X\n", rv->sub_id,
495 ((uint32_t*)avctx->extradata)[0]);
498 avctx->pix_fmt = AV_PIX_FMT_YUV420P;
500 if ((ret = ff_MPV_common_init(s)) < 0)
503 ff_h263dsp_init(&s->h263dsp);
504 ff_h263_decode_init_vlc();
508 INIT_VLC_STATIC(&rv_dc_lum, DC_VLC_BITS, 256,
510 rv_lum_code, 2, 2, 16384);
511 INIT_VLC_STATIC(&rv_dc_chrom, DC_VLC_BITS, 256,
513 rv_chrom_code, 2, 2, 16388);
520 static av_cold int rv10_decode_end(AVCodecContext *avctx)
522 MpegEncContext *s = avctx->priv_data;
524 ff_MPV_common_end(s);
528 static int rv10_decode_packet(AVCodecContext *avctx,
529 const uint8_t *buf, int buf_size, int buf_size2)
531 RVDecContext *rv = avctx->priv_data;
532 MpegEncContext *s = &rv->m;
533 int mb_count, mb_pos, left, start_mb_x, active_bits_size, ret;
535 active_bits_size = buf_size * 8;
536 init_get_bits(&s->gb, buf, FFMAX(buf_size, buf_size2) * 8);
537 if (s->codec_id == AV_CODEC_ID_RV10)
538 mb_count = rv10_decode_picture_header(s);
540 mb_count = rv20_decode_picture_header(rv);
542 if (mb_count != ERROR_SKIP_FRAME)
543 av_log(s->avctx, AV_LOG_ERROR, "HEADER ERROR\n");
544 return AVERROR_INVALIDDATA;
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);
550 return AVERROR_INVALIDDATA;
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");
556 return AVERROR_INVALIDDATA;
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?
561 ff_er_frame_end(&s->er);
563 s->mb_x = s->mb_y = s->resync_mb_x = s->resync_mb_y = 0;
565 if ((ret = ff_MPV_frame_start(s, avctx)) < 0)
567 ff_mpeg_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");
571 return AVERROR_INVALIDDATA;
576 av_dlog(avctx, "qscale=%d\n", s->qscale);
578 /* default quantization values */
579 if (s->codec_id == AV_CODEC_ID_RV10) {
581 s->first_slice_line = 1;
583 s->first_slice_line = 1;
584 s->resync_mb_x = s->mb_x;
586 start_mb_x = s->mb_x;
587 s->resync_mb_y = s->mb_y;
589 s->y_dc_scale_table = s->c_dc_scale_table = ff_aic_dc_scale_table;
591 s->y_dc_scale_table = s->c_dc_scale_table = ff_mpeg1_dc_scale_table;
594 if (s->modified_quant)
595 s->chroma_qscale_table = ff_h263_chroma_qscale_table;
597 ff_set_qscale(s, s->qscale);
599 s->rv10_first_dc_coded[0] = 0;
600 s->rv10_first_dc_coded[1] = 0;
601 s->rv10_first_dc_coded[2] = 0;
605 s->block_wrap[3] = s->b8_stride;
607 s->block_wrap[5] = s->mb_stride;
608 ff_init_block_index(s);
610 /* decode each macroblock */
611 for (s->mb_num_left = mb_count; s->mb_num_left > 0; s->mb_num_left--) {
613 ff_update_block_index(s);
614 av_dlog(avctx, "**mb x=%d y=%d\n", s->mb_x, s->mb_y);
616 s->mv_dir = MV_DIR_FORWARD;
617 s->mv_type = MV_TYPE_16X16;
618 ret = ff_h263_decode_mb(s, s->block);
620 // Repeat the slice end check from ff_h263_decode_mb with our active
622 if (ret != SLICE_ERROR) {
623 int v = show_bits(&s->gb, 16);
625 if (get_bits_count(&s->gb) + 16 > active_bits_size)
626 v >>= get_bits_count(&s->gb) + 16 - active_bits_size;
631 if (ret != SLICE_ERROR && active_bits_size < get_bits_count(&s->gb) &&
632 8 * buf_size2 >= get_bits_count(&s->gb)) {
633 active_bits_size = buf_size2 * 8;
634 av_log(avctx, AV_LOG_DEBUG, "update size from %d to %d\n",
635 8 * buf_size, active_bits_size);
639 if (ret == SLICE_ERROR || active_bits_size < get_bits_count(&s->gb)) {
640 av_log(s->avctx, AV_LOG_ERROR, "ERROR at MB %d %d\n", s->mb_x, s->mb_y);
641 return AVERROR_INVALIDDATA;
643 if (s->pict_type != AV_PICTURE_TYPE_B)
644 ff_h263_update_motion_val(s);
645 ff_MPV_decode_mb(s, s->block);
647 ff_h263_loop_filter(s);
649 if (++s->mb_x == s->mb_width) {
652 ff_init_block_index(s);
654 if (s->mb_x == s->resync_mb_x)
655 s->first_slice_line = 0;
656 if (ret == SLICE_END)
660 ff_er_add_slice(&s->er, start_mb_x, s->resync_mb_y, s->mb_x-1, s->mb_y,
663 return active_bits_size;
666 static int get_slice_offset(AVCodecContext *avctx, const uint8_t *buf, int n)
668 if (avctx->slice_count)
669 return avctx->slice_offset[n];
671 return AV_RL32(buf + n * 8);
674 static int rv10_decode_frame(AVCodecContext *avctx,
675 void *data, int *got_frame,
678 const uint8_t *buf = avpkt->data;
679 int buf_size = avpkt->size;
680 MpegEncContext *s = avctx->priv_data;
681 AVFrame *pict = data;
684 const uint8_t *slices_hdr = NULL;
686 av_dlog(avctx, "*****frame %d size=%d\n", avctx->frame_number, buf_size);
687 s->flags = avctx->flags;
688 s->flags2 = avctx->flags2;
690 /* no supplementary picture */
695 if (!avctx->slice_count) {
696 slice_count = (*buf++) + 1;
699 if (!slice_count || buf_size <= 8 * slice_count) {
700 av_log(avctx, AV_LOG_ERROR, "Invalid slice count: %d.\n", slice_count);
701 return AVERROR_INVALIDDATA;
704 slices_hdr = buf + 4;
705 buf += 8 * slice_count;
706 buf_size -= 8 * slice_count;
708 slice_count = avctx->slice_count;
710 for (i = 0; i < slice_count; i++) {
711 unsigned offset = get_slice_offset(avctx, slices_hdr, i);
714 if (offset >= buf_size)
715 return AVERROR_INVALIDDATA;
717 if (i + 1 == slice_count)
718 size = buf_size - offset;
720 size = get_slice_offset(avctx, slices_hdr, i + 1) - offset;
722 if (i + 2 >= slice_count)
723 size2 = buf_size - offset;
725 size2 = get_slice_offset(avctx, slices_hdr, i + 2) - offset;
727 if (size <= 0 || size2 <= 0 ||
728 offset + FFMAX(size, size2) > buf_size)
729 return AVERROR_INVALIDDATA;
731 if (rv10_decode_packet(avctx, buf + offset, size, size2) > 8 * size)
735 if (s->current_picture_ptr != NULL && s->mb_y >= s->mb_height) {
736 ff_er_frame_end(&s->er);
739 if (s->pict_type == AV_PICTURE_TYPE_B || s->low_delay) {
740 if ((ret = av_frame_ref(pict, &s->current_picture_ptr->f)) < 0)
742 ff_print_debug_info(s, s->current_picture_ptr, pict);
743 ff_mpv_export_qp_table(s, pict, s->current_picture_ptr, FF_QSCALE_TYPE_MPEG1);
744 } else if (s->last_picture_ptr != NULL) {
745 if ((ret = av_frame_ref(pict, &s->last_picture_ptr->f)) < 0)
747 ff_print_debug_info(s, s->last_picture_ptr, pict);
748 ff_mpv_export_qp_table(s, pict,s->last_picture_ptr, FF_QSCALE_TYPE_MPEG1);
751 if (s->last_picture_ptr || s->low_delay) {
755 // so we can detect if frame_end was not called (find some nicer solution...)
756 s->current_picture_ptr = NULL;
762 AVCodec ff_rv10_decoder = {
764 .long_name = NULL_IF_CONFIG_SMALL("RealVideo 1.0"),
765 .type = AVMEDIA_TYPE_VIDEO,
766 .id = AV_CODEC_ID_RV10,
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,
773 .pix_fmts = ff_pixfmt_list_420,
776 AVCodec ff_rv20_decoder = {
778 .long_name = NULL_IF_CONFIG_SMALL("RealVideo 2.0"),
779 .type = AVMEDIA_TYPE_VIDEO,
780 .id = AV_CODEC_ID_RV20,
781 .priv_data_size = sizeof(RVDecContext),
782 .init = rv10_decode_init,
783 .close = rv10_decode_end,
784 .decode = rv10_decode_frame,
785 .capabilities = CODEC_CAP_DR1 | CODEC_CAP_DELAY,
786 .flush = ff_mpeg_flush,
788 .pix_fmts = ff_pixfmt_list_420,