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"
35 #define RV_GET_MAJOR_VER(x) ((x) >> 28)
36 #define RV_GET_MINOR_VER(x) (((x) >> 20) & 0xFF)
37 #define RV_GET_MICRO_VER(x) (((x) >> 12) & 0xFF)
39 #define DC_VLC_BITS 14 //FIXME find a better solution
41 typedef struct RVDecContext {
46 static const uint16_t rv_lum_code[256] = {
47 0x3e7f, 0x0f00, 0x0f01, 0x0f02, 0x0f03, 0x0f04, 0x0f05, 0x0f06,
48 0x0f07, 0x0f08, 0x0f09, 0x0f0a, 0x0f0b, 0x0f0c, 0x0f0d, 0x0f0e,
49 0x0f0f, 0x0f10, 0x0f11, 0x0f12, 0x0f13, 0x0f14, 0x0f15, 0x0f16,
50 0x0f17, 0x0f18, 0x0f19, 0x0f1a, 0x0f1b, 0x0f1c, 0x0f1d, 0x0f1e,
51 0x0f1f, 0x0f20, 0x0f21, 0x0f22, 0x0f23, 0x0f24, 0x0f25, 0x0f26,
52 0x0f27, 0x0f28, 0x0f29, 0x0f2a, 0x0f2b, 0x0f2c, 0x0f2d, 0x0f2e,
53 0x0f2f, 0x0f30, 0x0f31, 0x0f32, 0x0f33, 0x0f34, 0x0f35, 0x0f36,
54 0x0f37, 0x0f38, 0x0f39, 0x0f3a, 0x0f3b, 0x0f3c, 0x0f3d, 0x0f3e,
55 0x0f3f, 0x0380, 0x0381, 0x0382, 0x0383, 0x0384, 0x0385, 0x0386,
56 0x0387, 0x0388, 0x0389, 0x038a, 0x038b, 0x038c, 0x038d, 0x038e,
57 0x038f, 0x0390, 0x0391, 0x0392, 0x0393, 0x0394, 0x0395, 0x0396,
58 0x0397, 0x0398, 0x0399, 0x039a, 0x039b, 0x039c, 0x039d, 0x039e,
59 0x039f, 0x00c0, 0x00c1, 0x00c2, 0x00c3, 0x00c4, 0x00c5, 0x00c6,
60 0x00c7, 0x00c8, 0x00c9, 0x00ca, 0x00cb, 0x00cc, 0x00cd, 0x00ce,
61 0x00cf, 0x0050, 0x0051, 0x0052, 0x0053, 0x0054, 0x0055, 0x0056,
62 0x0057, 0x0020, 0x0021, 0x0022, 0x0023, 0x000c, 0x000d, 0x0004,
63 0x0000, 0x0005, 0x000e, 0x000f, 0x0024, 0x0025, 0x0026, 0x0027,
64 0x0058, 0x0059, 0x005a, 0x005b, 0x005c, 0x005d, 0x005e, 0x005f,
65 0x00d0, 0x00d1, 0x00d2, 0x00d3, 0x00d4, 0x00d5, 0x00d6, 0x00d7,
66 0x00d8, 0x00d9, 0x00da, 0x00db, 0x00dc, 0x00dd, 0x00de, 0x00df,
67 0x03a0, 0x03a1, 0x03a2, 0x03a3, 0x03a4, 0x03a5, 0x03a6, 0x03a7,
68 0x03a8, 0x03a9, 0x03aa, 0x03ab, 0x03ac, 0x03ad, 0x03ae, 0x03af,
69 0x03b0, 0x03b1, 0x03b2, 0x03b3, 0x03b4, 0x03b5, 0x03b6, 0x03b7,
70 0x03b8, 0x03b9, 0x03ba, 0x03bb, 0x03bc, 0x03bd, 0x03be, 0x03bf,
71 0x0f40, 0x0f41, 0x0f42, 0x0f43, 0x0f44, 0x0f45, 0x0f46, 0x0f47,
72 0x0f48, 0x0f49, 0x0f4a, 0x0f4b, 0x0f4c, 0x0f4d, 0x0f4e, 0x0f4f,
73 0x0f50, 0x0f51, 0x0f52, 0x0f53, 0x0f54, 0x0f55, 0x0f56, 0x0f57,
74 0x0f58, 0x0f59, 0x0f5a, 0x0f5b, 0x0f5c, 0x0f5d, 0x0f5e, 0x0f5f,
75 0x0f60, 0x0f61, 0x0f62, 0x0f63, 0x0f64, 0x0f65, 0x0f66, 0x0f67,
76 0x0f68, 0x0f69, 0x0f6a, 0x0f6b, 0x0f6c, 0x0f6d, 0x0f6e, 0x0f6f,
77 0x0f70, 0x0f71, 0x0f72, 0x0f73, 0x0f74, 0x0f75, 0x0f76, 0x0f77,
78 0x0f78, 0x0f79, 0x0f7a, 0x0f7b, 0x0f7c, 0x0f7d, 0x0f7e, 0x0f7f,
81 static const uint8_t rv_lum_bits[256] = {
82 14, 12, 12, 12, 12, 12, 12, 12,
83 12, 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, 10, 10, 10, 10, 10, 10, 10,
91 10, 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, 8, 8, 8, 8, 8, 8, 8,
95 8, 8, 8, 8, 8, 8, 8, 8,
96 8, 7, 7, 7, 7, 7, 7, 7,
97 7, 6, 6, 6, 6, 5, 5, 4,
98 2, 4, 5, 5, 6, 6, 6, 6,
99 7, 7, 7, 7, 7, 7, 7, 7,
100 8, 8, 8, 8, 8, 8, 8, 8,
101 8, 8, 8, 8, 8, 8, 8, 8,
102 10, 10, 10, 10, 10, 10, 10, 10,
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 12, 12, 12, 12, 12, 12, 12, 12,
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,
116 static const uint16_t rv_chrom_code[256] = {
117 0xfe7f, 0x3f00, 0x3f01, 0x3f02, 0x3f03, 0x3f04, 0x3f05, 0x3f06,
118 0x3f07, 0x3f08, 0x3f09, 0x3f0a, 0x3f0b, 0x3f0c, 0x3f0d, 0x3f0e,
119 0x3f0f, 0x3f10, 0x3f11, 0x3f12, 0x3f13, 0x3f14, 0x3f15, 0x3f16,
120 0x3f17, 0x3f18, 0x3f19, 0x3f1a, 0x3f1b, 0x3f1c, 0x3f1d, 0x3f1e,
121 0x3f1f, 0x3f20, 0x3f21, 0x3f22, 0x3f23, 0x3f24, 0x3f25, 0x3f26,
122 0x3f27, 0x3f28, 0x3f29, 0x3f2a, 0x3f2b, 0x3f2c, 0x3f2d, 0x3f2e,
123 0x3f2f, 0x3f30, 0x3f31, 0x3f32, 0x3f33, 0x3f34, 0x3f35, 0x3f36,
124 0x3f37, 0x3f38, 0x3f39, 0x3f3a, 0x3f3b, 0x3f3c, 0x3f3d, 0x3f3e,
125 0x3f3f, 0x0f80, 0x0f81, 0x0f82, 0x0f83, 0x0f84, 0x0f85, 0x0f86,
126 0x0f87, 0x0f88, 0x0f89, 0x0f8a, 0x0f8b, 0x0f8c, 0x0f8d, 0x0f8e,
127 0x0f8f, 0x0f90, 0x0f91, 0x0f92, 0x0f93, 0x0f94, 0x0f95, 0x0f96,
128 0x0f97, 0x0f98, 0x0f99, 0x0f9a, 0x0f9b, 0x0f9c, 0x0f9d, 0x0f9e,
129 0x0f9f, 0x03c0, 0x03c1, 0x03c2, 0x03c3, 0x03c4, 0x03c5, 0x03c6,
130 0x03c7, 0x03c8, 0x03c9, 0x03ca, 0x03cb, 0x03cc, 0x03cd, 0x03ce,
131 0x03cf, 0x00e0, 0x00e1, 0x00e2, 0x00e3, 0x00e4, 0x00e5, 0x00e6,
132 0x00e7, 0x0030, 0x0031, 0x0032, 0x0033, 0x0008, 0x0009, 0x0002,
133 0x0000, 0x0003, 0x000a, 0x000b, 0x0034, 0x0035, 0x0036, 0x0037,
134 0x00e8, 0x00e9, 0x00ea, 0x00eb, 0x00ec, 0x00ed, 0x00ee, 0x00ef,
135 0x03d0, 0x03d1, 0x03d2, 0x03d3, 0x03d4, 0x03d5, 0x03d6, 0x03d7,
136 0x03d8, 0x03d9, 0x03da, 0x03db, 0x03dc, 0x03dd, 0x03de, 0x03df,
137 0x0fa0, 0x0fa1, 0x0fa2, 0x0fa3, 0x0fa4, 0x0fa5, 0x0fa6, 0x0fa7,
138 0x0fa8, 0x0fa9, 0x0faa, 0x0fab, 0x0fac, 0x0fad, 0x0fae, 0x0faf,
139 0x0fb0, 0x0fb1, 0x0fb2, 0x0fb3, 0x0fb4, 0x0fb5, 0x0fb6, 0x0fb7,
140 0x0fb8, 0x0fb9, 0x0fba, 0x0fbb, 0x0fbc, 0x0fbd, 0x0fbe, 0x0fbf,
141 0x3f40, 0x3f41, 0x3f42, 0x3f43, 0x3f44, 0x3f45, 0x3f46, 0x3f47,
142 0x3f48, 0x3f49, 0x3f4a, 0x3f4b, 0x3f4c, 0x3f4d, 0x3f4e, 0x3f4f,
143 0x3f50, 0x3f51, 0x3f52, 0x3f53, 0x3f54, 0x3f55, 0x3f56, 0x3f57,
144 0x3f58, 0x3f59, 0x3f5a, 0x3f5b, 0x3f5c, 0x3f5d, 0x3f5e, 0x3f5f,
145 0x3f60, 0x3f61, 0x3f62, 0x3f63, 0x3f64, 0x3f65, 0x3f66, 0x3f67,
146 0x3f68, 0x3f69, 0x3f6a, 0x3f6b, 0x3f6c, 0x3f6d, 0x3f6e, 0x3f6f,
147 0x3f70, 0x3f71, 0x3f72, 0x3f73, 0x3f74, 0x3f75, 0x3f76, 0x3f77,
148 0x3f78, 0x3f79, 0x3f7a, 0x3f7b, 0x3f7c, 0x3f7d, 0x3f7e, 0x3f7f,
151 static const uint8_t rv_chrom_bits[256] = {
152 16, 14, 14, 14, 14, 14, 14, 14,
153 14, 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, 12, 12, 12, 12, 12, 12, 12,
161 12, 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, 10, 10, 10, 10, 10, 10, 10,
165 10, 10, 10, 10, 10, 10, 10, 10,
166 10, 8, 8, 8, 8, 8, 8, 8,
167 8, 6, 6, 6, 6, 4, 4, 3,
168 2, 3, 4, 4, 6, 6, 6, 6,
169 8, 8, 8, 8, 8, 8, 8, 8,
170 10, 10, 10, 10, 10, 10, 10, 10,
171 10, 10, 10, 10, 10, 10, 10, 10,
172 12, 12, 12, 12, 12, 12, 12, 12,
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 14, 14, 14, 14, 14, 14, 14, 14,
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,
186 static VLC rv_dc_lum, rv_dc_chrom;
188 int ff_rv_decode_dc(MpegEncContext *s, int n)
193 code = get_vlc2(&s->gb, rv_dc_lum.table, DC_VLC_BITS, 2);
195 /* XXX: I don't understand why they use LONGER codes than
196 necessary. The following code would be completely useless
197 if they had thought about it !!! */
198 code = get_bits(&s->gb, 7);
200 code = (int8_t)(get_bits(&s->gb, 7) + 1);
201 } else if (code == 0x7d) {
202 code = -128 + get_bits(&s->gb, 7);
203 } else if (code == 0x7e) {
204 if (get_bits1(&s->gb) == 0)
205 code = (int8_t)(get_bits(&s->gb, 8) + 1);
207 code = (int8_t)(get_bits(&s->gb, 8));
208 } else if (code == 0x7f) {
209 skip_bits(&s->gb, 11);
216 code = get_vlc2(&s->gb, rv_dc_chrom.table, DC_VLC_BITS, 2);
219 code = get_bits(&s->gb, 9);
221 code = (int8_t)(get_bits(&s->gb, 7) + 1);
222 } else if (code == 0x1fd) {
223 code = -128 + get_bits(&s->gb, 7);
224 } else if (code == 0x1fe) {
225 skip_bits(&s->gb, 9);
228 av_log(s->avctx, AV_LOG_ERROR, "chroma dc error\n");
238 /* read RV 1.0 compatible frame header */
239 static int rv10_decode_picture_header(MpegEncContext *s)
241 int mb_count, pb_frame, marker, mb_xy;
243 marker = get_bits1(&s->gb);
245 if (get_bits1(&s->gb))
246 s->pict_type = AV_PICTURE_TYPE_P;
248 s->pict_type = AV_PICTURE_TYPE_I;
251 av_log(s->avctx, AV_LOG_ERROR, "marker missing\n");
253 pb_frame = get_bits1(&s->gb);
255 av_dlog(s->avctx, "pict_type=%d pb_frame=%d\n", s->pict_type, pb_frame);
258 avpriv_request_sample(s->avctx, "pb frame");
259 return AVERROR_PATCHWELCOME;
262 s->qscale = get_bits(&s->gb, 5);
263 if (s->qscale == 0) {
264 av_log(s->avctx, AV_LOG_ERROR, "Invalid qscale value: 0\n");
265 return AVERROR_INVALIDDATA;
268 if (s->pict_type == AV_PICTURE_TYPE_I) {
269 if (s->rv10_version == 3) {
270 /* specific MPEG like DC coding not used */
271 s->last_dc[0] = get_bits(&s->gb, 8);
272 s->last_dc[1] = get_bits(&s->gb, 8);
273 s->last_dc[2] = get_bits(&s->gb, 8);
274 av_dlog(s->avctx, "DC:%d %d %d\n", s->last_dc[0],
275 s->last_dc[1], s->last_dc[2]);
278 /* if multiple packets per frame are sent, the position at which
279 to display the macroblocks is coded here */
281 mb_xy = s->mb_x + s->mb_y * s->mb_width;
282 if (show_bits(&s->gb, 12) == 0 || (mb_xy && mb_xy < s->mb_num)) {
283 s->mb_x = get_bits(&s->gb, 6); /* mb_x */
284 s->mb_y = get_bits(&s->gb, 6); /* mb_y */
285 mb_count = get_bits(&s->gb, 12);
289 mb_count = s->mb_width * s->mb_height;
291 skip_bits(&s->gb, 3); /* ignored */
293 s->unrestricted_mv = 1;
298 static int rv20_decode_picture_header(RVDecContext *rv)
300 MpegEncContext *s = &rv->m;
301 int seq, mb_pos, i, ret;
304 i = get_bits(&s->gb, 2);
306 case 0: s->pict_type = AV_PICTURE_TYPE_I; break;
307 case 1: s->pict_type = AV_PICTURE_TYPE_I; break; //hmm ...
308 case 2: s->pict_type = AV_PICTURE_TYPE_P; break;
309 case 3: s->pict_type = AV_PICTURE_TYPE_B; break;
311 av_log(s->avctx, AV_LOG_ERROR, "unknown frame type\n");
312 return AVERROR_INVALIDDATA;
315 if (s->last_picture_ptr == NULL && s->pict_type == AV_PICTURE_TYPE_B) {
316 av_log(s->avctx, AV_LOG_ERROR, "early B-frame\n");
317 return AVERROR_INVALIDDATA;
320 if (get_bits1(&s->gb)) {
321 av_log(s->avctx, AV_LOG_ERROR, "reserved bit set\n");
322 return AVERROR_INVALIDDATA;
325 s->qscale = get_bits(&s->gb, 5);
326 if (s->qscale == 0) {
327 av_log(s->avctx, AV_LOG_ERROR, "Invalid qscale value: 0\n");
328 return AVERROR_INVALIDDATA;
331 if (RV_GET_MINOR_VER(rv->sub_id) >= 2)
332 s->loop_filter = get_bits1(&s->gb);
334 if (RV_GET_MINOR_VER(rv->sub_id) <= 1)
335 seq = get_bits(&s->gb, 8) << 7;
337 seq = get_bits(&s->gb, 13) << 2;
339 rpr_bits = s->avctx->extradata[1] & 7;
342 rpr_bits = FFMIN((rpr_bits >> 1) + 1, 3);
344 f = get_bits(&s->gb, rpr_bits);
347 if (s->avctx->extradata_size < 8 + 2 * f) {
348 av_log(s->avctx, AV_LOG_ERROR, "Extradata too small.\n");
349 return AVERROR_INVALIDDATA;
352 new_w = 4 * ((uint8_t*)s->avctx->extradata)[6 + 2 * f];
353 new_h = 4 * ((uint8_t*)s->avctx->extradata)[7 + 2 * f];
355 new_w = s->orig_width ;
356 new_h = s->orig_height;
358 if (new_w != s->width || new_h != s->height) {
359 av_log(s->avctx, AV_LOG_DEBUG,
360 "attempting to change resolution to %dx%d\n", new_w, new_h);
361 if (av_image_check_size(new_w, new_h, 0, s->avctx) < 0)
362 return AVERROR_INVALIDDATA;
363 ff_MPV_common_end(s);
364 avcodec_set_dimensions(s->avctx, new_w, new_h);
367 if ((ret = ff_MPV_common_init(s)) < 0)
371 if (s->avctx->debug & FF_DEBUG_PICT_INFO) {
372 av_log(s->avctx, AV_LOG_DEBUG, "F %d/%d\n", f, rpr_bits);
374 } else if (av_image_check_size(s->width, s->height, 0, s->avctx) < 0)
375 return AVERROR_INVALIDDATA;
377 mb_pos = ff_h263_decode_mba(s);
379 seq |= s->time & ~0x7FFF;
380 if (seq - s->time > 0x4000)
382 if (seq - s->time < -0x4000)
385 if (seq != s->time) {
386 if (s->pict_type != AV_PICTURE_TYPE_B) {
388 s->pp_time = s->time - s->last_non_b_time;
389 s->last_non_b_time = s->time;
392 s->pb_time = s->pp_time - (s->last_non_b_time - s->time);
393 if (s->pp_time <= s->pb_time ||
394 s->pp_time <= s->pp_time - s->pb_time || s->pp_time <= 0) {
395 av_log(s->avctx, AV_LOG_DEBUG, "messed up order, possible "
396 "from seeking? skipping current b frame\n");
397 return FRAME_SKIPPED;
399 ff_mpeg4_init_direct_mv(s);
403 s->no_rounding = get_bits1(&s->gb);
405 if (RV_GET_MINOR_VER(rv->sub_id) <= 1 && s->pict_type == AV_PICTURE_TYPE_B)
406 skip_bits(&s->gb, 5); // binary decoder reads 3+2 bits here but they don't seem to be used
409 s->unrestricted_mv = 1;
410 s->h263_aic = s->pict_type == AV_PICTURE_TYPE_I;
411 s->modified_quant = 1;
414 if (s->avctx->debug & FF_DEBUG_PICT_INFO) {
415 av_log(s->avctx, AV_LOG_INFO, "num:%5d x:%2d y:%2d type:%d qscale:%2d rnd:%d\n",
416 seq, s->mb_x, s->mb_y, s->pict_type, s->qscale, s->no_rounding);
419 assert(s->pict_type != AV_PICTURE_TYPE_B || !s->low_delay);
421 return s->mb_width*s->mb_height - mb_pos;
424 static av_cold int rv10_decode_init(AVCodecContext *avctx)
426 RVDecContext *rv = avctx->priv_data;
427 MpegEncContext *s = &rv->m;
429 int major_ver, minor_ver, micro_ver, ret;
431 if (avctx->extradata_size < 8) {
432 av_log(avctx, AV_LOG_ERROR, "Extradata is too small.\n");
433 return AVERROR_INVALIDDATA;
436 ff_MPV_decode_defaults(s);
439 s->out_format = FMT_H263;
440 s->codec_id = avctx->codec_id;
441 avctx->flags |= CODEC_FLAG_EMU_EDGE;
443 s->orig_width = s->width = avctx->coded_width;
444 s->orig_height = s->height = avctx->coded_height;
446 s->h263_long_vectors = ((uint8_t*)avctx->extradata)[3] & 1;
447 rv->sub_id = AV_RB32((uint8_t*)avctx->extradata + 4);
449 major_ver = RV_GET_MAJOR_VER(rv->sub_id);
450 minor_ver = RV_GET_MINOR_VER(rv->sub_id);
451 micro_ver = RV_GET_MICRO_VER(rv->sub_id);
456 s->rv10_version = micro_ver ? 3 : 1;
457 s->obmc = micro_ver == 2;
460 if (minor_ver >= 2) {
462 s->avctx->has_b_frames = 1;
466 av_log(s->avctx, AV_LOG_ERROR, "unknown header %X\n", rv->sub_id);
467 avpriv_request_sample(avctx, "RV1/2 version");
468 return AVERROR_PATCHWELCOME;
471 if (avctx->debug & FF_DEBUG_PICT_INFO) {
472 av_log(avctx, AV_LOG_DEBUG, "ver:%X ver0:%X\n", rv->sub_id,
473 avctx->extradata_size >= 4 ? ((uint32_t*)avctx->extradata)[0] : -1);
476 avctx->pix_fmt = AV_PIX_FMT_YUV420P;
478 if ((ret = ff_MPV_common_init(s)) < 0)
481 ff_h263_decode_init_vlc();
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, ret;
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 == AV_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");
520 return AVERROR_INVALIDDATA;
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 AVERROR_INVALIDDATA;
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 AVERROR_INVALIDDATA;
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->er);
539 s->mb_x = s->mb_y = s->resync_mb_x = s->resync_mb_y = 0;
541 if ((ret = ff_MPV_frame_start(s, avctx)) < 0)
543 ff_mpeg_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");
547 return AVERROR_INVALIDDATA;
551 av_dlog(avctx, "qscale=%d\n", s->qscale);
553 /* default quantization values */
554 if (s->codec_id == AV_CODEC_ID_RV10) {
556 s->first_slice_line = 1;
558 s->first_slice_line = 1;
559 s->resync_mb_x = s->mb_x;
561 start_mb_x = s->mb_x;
562 s->resync_mb_y = s->mb_y;
564 s->y_dc_scale_table = s->c_dc_scale_table = ff_aic_dc_scale_table;
566 s->y_dc_scale_table = s->c_dc_scale_table = ff_mpeg1_dc_scale_table;
569 if (s->modified_quant)
570 s->chroma_qscale_table = ff_h263_chroma_qscale_table;
572 ff_set_qscale(s, s->qscale);
574 s->rv10_first_dc_coded[0] = 0;
575 s->rv10_first_dc_coded[1] = 0;
576 s->rv10_first_dc_coded[2] = 0;
580 s->block_wrap[3] = s->b8_stride;
582 s->block_wrap[5] = s->mb_stride;
583 ff_init_block_index(s);
585 /* decode each macroblock */
586 for (s->mb_num_left = mb_count; s->mb_num_left > 0; s->mb_num_left--) {
588 ff_update_block_index(s);
589 av_dlog(avctx, "**mb x=%d y=%d\n", s->mb_x, s->mb_y);
591 s->mv_dir = MV_DIR_FORWARD;
592 s->mv_type = MV_TYPE_16X16;
593 ret = ff_h263_decode_mb(s, s->block);
595 // Repeat the slice end check from ff_h263_decode_mb with our active
597 if (ret != SLICE_ERROR) {
598 int v = show_bits(&s->gb, 16);
600 if (get_bits_count(&s->gb) + 16 > active_bits_size)
601 v >>= get_bits_count(&s->gb) + 16 - active_bits_size;
606 if (ret != SLICE_ERROR && active_bits_size < get_bits_count(&s->gb) &&
607 8 * buf_size2 >= get_bits_count(&s->gb)) {
608 active_bits_size = buf_size2 * 8;
609 av_log(avctx, AV_LOG_DEBUG, "update size from %d to %d\n",
610 8 * buf_size, active_bits_size);
614 if (ret == SLICE_ERROR || active_bits_size < get_bits_count(&s->gb)) {
615 av_log(s->avctx, AV_LOG_ERROR, "ERROR at MB %d %d\n", s->mb_x, s->mb_y);
616 return AVERROR_INVALIDDATA;
618 if (s->pict_type != AV_PICTURE_TYPE_B)
619 ff_h263_update_motion_val(s);
620 ff_MPV_decode_mb(s, s->block);
622 ff_h263_loop_filter(s);
624 if (++s->mb_x == s->mb_width) {
627 ff_init_block_index(s);
629 if (s->mb_x == s->resync_mb_x)
630 s->first_slice_line = 0;
631 if (ret == SLICE_END)
635 ff_er_add_slice(&s->er, start_mb_x, s->resync_mb_y, s->mb_x-1, s->mb_y,
638 return active_bits_size;
641 static int get_slice_offset(AVCodecContext *avctx, const uint8_t *buf, int n)
643 if (avctx->slice_count)
644 return avctx->slice_offset[n];
646 return AV_RL32(buf + n * 8);
649 static int rv10_decode_frame(AVCodecContext *avctx,
650 void *data, int *got_frame,
653 const uint8_t *buf = avpkt->data;
654 int buf_size = avpkt->size;
655 MpegEncContext *s = avctx->priv_data;
656 AVFrame *pict = data;
659 const uint8_t *slices_hdr = NULL;
661 av_dlog(avctx, "*****frame %d size=%d\n", avctx->frame_number, buf_size);
663 /* no supplementary picture */
668 if (!avctx->slice_count) {
669 slice_count = (*buf++) + 1;
672 if (!slice_count || buf_size <= 8 * slice_count) {
673 av_log(avctx, AV_LOG_ERROR, "Invalid slice count: %d.\n", slice_count);
674 return AVERROR_INVALIDDATA;
677 slices_hdr = buf + 4;
678 buf += 8 * slice_count;
679 buf_size -= 8 * slice_count;
681 slice_count = avctx->slice_count;
683 for (i = 0; i < slice_count; i++) {
684 unsigned offset = get_slice_offset(avctx, slices_hdr, i);
687 if (offset >= buf_size)
688 return AVERROR_INVALIDDATA;
690 if (i + 1 == slice_count)
691 size = buf_size - offset;
693 size = get_slice_offset(avctx, slices_hdr, i + 1) - offset;
695 if (i + 2 >= slice_count)
696 size2 = buf_size - offset;
698 size2 = get_slice_offset(avctx, slices_hdr, i + 2) - offset;
700 if (size <= 0 || size2 <= 0 ||
701 offset + FFMAX(size, size2) > buf_size)
702 return AVERROR_INVALIDDATA;
704 if (rv10_decode_packet(avctx, buf + offset, size, size2) > 8 * size)
708 if (s->current_picture_ptr != NULL && s->mb_y >= s->mb_height) {
709 ff_er_frame_end(&s->er);
712 if (s->pict_type == AV_PICTURE_TYPE_B || s->low_delay) {
713 if ((ret = av_frame_ref(pict, &s->current_picture_ptr->f)) < 0)
715 ff_print_debug_info(s, s->current_picture_ptr);
716 } else if (s->last_picture_ptr != NULL) {
717 if ((ret = av_frame_ref(pict, &s->last_picture_ptr->f)) < 0)
719 ff_print_debug_info(s, s->last_picture_ptr);
722 if (s->last_picture_ptr || s->low_delay) {
726 // so we can detect if frame_end was not called (find some nicer solution...)
727 s->current_picture_ptr = NULL;
733 AVCodec ff_rv10_decoder = {
735 .type = AVMEDIA_TYPE_VIDEO,
736 .id = AV_CODEC_ID_RV10,
737 .priv_data_size = sizeof(RVDecContext),
738 .init = rv10_decode_init,
739 .close = rv10_decode_end,
740 .decode = rv10_decode_frame,
741 .capabilities = CODEC_CAP_DR1,
742 .long_name = NULL_IF_CONFIG_SMALL("RealVideo 1.0"),
743 .pix_fmts = ff_pixfmt_list_420,
746 AVCodec ff_rv20_decoder = {
748 .type = AVMEDIA_TYPE_VIDEO,
749 .id = AV_CODEC_ID_RV20,
750 .priv_data_size = sizeof(RVDecContext),
751 .init = rv10_decode_init,
752 .close = rv10_decode_end,
753 .decode = rv10_decode_frame,
754 .capabilities = CODEC_CAP_DR1 | CODEC_CAP_DELAY,
755 .flush = ff_mpeg_flush,
756 .long_name = NULL_IF_CONFIG_SMALL("RealVideo 2.0"),
757 .pix_fmts = ff_pixfmt_list_420,