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;
435 if ((ret = av_image_check_size(avctx->coded_width,
436 avctx->coded_height, 0, avctx)) < 0)
439 ff_MPV_decode_defaults(s);
442 s->out_format = FMT_H263;
443 s->codec_id = avctx->codec_id;
444 avctx->flags |= CODEC_FLAG_EMU_EDGE;
446 s->orig_width = s->width = avctx->coded_width;
447 s->orig_height = s->height = avctx->coded_height;
449 s->h263_long_vectors = ((uint8_t*)avctx->extradata)[3] & 1;
450 rv->sub_id = AV_RB32((uint8_t*)avctx->extradata + 4);
452 major_ver = RV_GET_MAJOR_VER(rv->sub_id);
453 minor_ver = RV_GET_MINOR_VER(rv->sub_id);
454 micro_ver = RV_GET_MICRO_VER(rv->sub_id);
459 s->rv10_version = micro_ver ? 3 : 1;
460 s->obmc = micro_ver == 2;
463 if (minor_ver >= 2) {
465 s->avctx->has_b_frames = 1;
469 av_log(s->avctx, AV_LOG_ERROR, "unknown header %X\n", rv->sub_id);
470 avpriv_request_sample(avctx, "RV1/2 version");
471 return AVERROR_PATCHWELCOME;
474 if (avctx->debug & FF_DEBUG_PICT_INFO) {
475 av_log(avctx, AV_LOG_DEBUG, "ver:%X ver0:%X\n", rv->sub_id,
476 avctx->extradata_size >= 4 ? ((uint32_t*)avctx->extradata)[0] : -1);
479 avctx->pix_fmt = AV_PIX_FMT_YUV420P;
481 if ((ret = ff_MPV_common_init(s)) < 0)
484 ff_h263_decode_init_vlc();
488 INIT_VLC_STATIC(&rv_dc_lum, DC_VLC_BITS, 256,
490 rv_lum_code, 2, 2, 16384);
491 INIT_VLC_STATIC(&rv_dc_chrom, DC_VLC_BITS, 256,
493 rv_chrom_code, 2, 2, 16388);
500 static av_cold int rv10_decode_end(AVCodecContext *avctx)
502 MpegEncContext *s = avctx->priv_data;
504 ff_MPV_common_end(s);
508 static int rv10_decode_packet(AVCodecContext *avctx,
509 const uint8_t *buf, int buf_size, int buf_size2)
511 RVDecContext *rv = avctx->priv_data;
512 MpegEncContext *s = &rv->m;
513 int mb_count, mb_pos, left, start_mb_x, active_bits_size, ret;
515 active_bits_size = buf_size * 8;
516 init_get_bits(&s->gb, buf, FFMAX(buf_size, buf_size2) * 8);
517 if (s->codec_id == AV_CODEC_ID_RV10)
518 mb_count = rv10_decode_picture_header(s);
520 mb_count = rv20_decode_picture_header(rv);
522 av_log(s->avctx, AV_LOG_ERROR, "HEADER ERROR\n");
523 return AVERROR_INVALIDDATA;
526 if (s->mb_x >= s->mb_width ||
527 s->mb_y >= s->mb_height) {
528 av_log(s->avctx, AV_LOG_ERROR, "POS ERROR %d %d\n", s->mb_x, s->mb_y);
529 return AVERROR_INVALIDDATA;
531 mb_pos = s->mb_y * s->mb_width + s->mb_x;
532 left = s->mb_width * s->mb_height - mb_pos;
533 if (mb_count > left) {
534 av_log(s->avctx, AV_LOG_ERROR, "COUNT ERROR\n");
535 return AVERROR_INVALIDDATA;
538 if ((s->mb_x == 0 && s->mb_y == 0) || s->current_picture_ptr == NULL) {
539 if (s->current_picture_ptr) { // FIXME write parser so we always have complete frames?
540 ff_er_frame_end(&s->er);
542 s->mb_x = s->mb_y = s->resync_mb_x = s->resync_mb_y = 0;
544 if ((ret = ff_MPV_frame_start(s, avctx)) < 0)
546 ff_mpeg_er_frame_start(s);
548 if (s->current_picture_ptr->f.pict_type != s->pict_type) {
549 av_log(s->avctx, AV_LOG_ERROR, "Slice type mismatch\n");
550 return AVERROR_INVALIDDATA;
554 av_dlog(avctx, "qscale=%d\n", s->qscale);
556 /* default quantization values */
557 if (s->codec_id == AV_CODEC_ID_RV10) {
559 s->first_slice_line = 1;
561 s->first_slice_line = 1;
562 s->resync_mb_x = s->mb_x;
564 start_mb_x = s->mb_x;
565 s->resync_mb_y = s->mb_y;
567 s->y_dc_scale_table = s->c_dc_scale_table = ff_aic_dc_scale_table;
569 s->y_dc_scale_table = s->c_dc_scale_table = ff_mpeg1_dc_scale_table;
572 if (s->modified_quant)
573 s->chroma_qscale_table = ff_h263_chroma_qscale_table;
575 ff_set_qscale(s, s->qscale);
577 s->rv10_first_dc_coded[0] = 0;
578 s->rv10_first_dc_coded[1] = 0;
579 s->rv10_first_dc_coded[2] = 0;
583 s->block_wrap[3] = s->b8_stride;
585 s->block_wrap[5] = s->mb_stride;
586 ff_init_block_index(s);
588 /* decode each macroblock */
589 for (s->mb_num_left = mb_count; s->mb_num_left > 0; s->mb_num_left--) {
591 ff_update_block_index(s);
592 av_dlog(avctx, "**mb x=%d y=%d\n", s->mb_x, s->mb_y);
594 s->mv_dir = MV_DIR_FORWARD;
595 s->mv_type = MV_TYPE_16X16;
596 ret = ff_h263_decode_mb(s, s->block);
598 // Repeat the slice end check from ff_h263_decode_mb with our active
600 if (ret != SLICE_ERROR) {
601 int v = show_bits(&s->gb, 16);
603 if (get_bits_count(&s->gb) + 16 > active_bits_size)
604 v >>= get_bits_count(&s->gb) + 16 - active_bits_size;
609 if (ret != SLICE_ERROR && active_bits_size < get_bits_count(&s->gb) &&
610 8 * buf_size2 >= get_bits_count(&s->gb)) {
611 active_bits_size = buf_size2 * 8;
612 av_log(avctx, AV_LOG_DEBUG, "update size from %d to %d\n",
613 8 * buf_size, active_bits_size);
617 if (ret == SLICE_ERROR || active_bits_size < get_bits_count(&s->gb)) {
618 av_log(s->avctx, AV_LOG_ERROR, "ERROR at MB %d %d\n", s->mb_x, s->mb_y);
619 return AVERROR_INVALIDDATA;
621 if (s->pict_type != AV_PICTURE_TYPE_B)
622 ff_h263_update_motion_val(s);
623 ff_MPV_decode_mb(s, s->block);
625 ff_h263_loop_filter(s);
627 if (++s->mb_x == s->mb_width) {
630 ff_init_block_index(s);
632 if (s->mb_x == s->resync_mb_x)
633 s->first_slice_line = 0;
634 if (ret == SLICE_END)
638 ff_er_add_slice(&s->er, start_mb_x, s->resync_mb_y, s->mb_x-1, s->mb_y,
641 return active_bits_size;
644 static int get_slice_offset(AVCodecContext *avctx, const uint8_t *buf, int n)
646 if (avctx->slice_count)
647 return avctx->slice_offset[n];
649 return AV_RL32(buf + n * 8);
652 static int rv10_decode_frame(AVCodecContext *avctx,
653 void *data, int *got_frame,
656 const uint8_t *buf = avpkt->data;
657 int buf_size = avpkt->size;
658 MpegEncContext *s = avctx->priv_data;
659 AVFrame *pict = data;
662 const uint8_t *slices_hdr = NULL;
664 av_dlog(avctx, "*****frame %d size=%d\n", avctx->frame_number, buf_size);
666 /* no supplementary picture */
671 if (!avctx->slice_count) {
672 slice_count = (*buf++) + 1;
675 if (!slice_count || buf_size <= 8 * slice_count) {
676 av_log(avctx, AV_LOG_ERROR, "Invalid slice count: %d.\n", slice_count);
677 return AVERROR_INVALIDDATA;
680 slices_hdr = buf + 4;
681 buf += 8 * slice_count;
682 buf_size -= 8 * slice_count;
684 slice_count = avctx->slice_count;
686 for (i = 0; i < slice_count; i++) {
687 unsigned offset = get_slice_offset(avctx, slices_hdr, i);
690 if (offset >= buf_size)
691 return AVERROR_INVALIDDATA;
693 if (i + 1 == slice_count)
694 size = buf_size - offset;
696 size = get_slice_offset(avctx, slices_hdr, i + 1) - offset;
698 if (i + 2 >= slice_count)
699 size2 = buf_size - offset;
701 size2 = get_slice_offset(avctx, slices_hdr, i + 2) - offset;
703 if (size <= 0 || size2 <= 0 ||
704 offset + FFMAX(size, size2) > buf_size)
705 return AVERROR_INVALIDDATA;
707 if (rv10_decode_packet(avctx, buf + offset, size, size2) > 8 * size)
711 if (s->current_picture_ptr != NULL && s->mb_y >= s->mb_height) {
712 ff_er_frame_end(&s->er);
715 if (s->pict_type == AV_PICTURE_TYPE_B || s->low_delay) {
716 if ((ret = av_frame_ref(pict, &s->current_picture_ptr->f)) < 0)
718 ff_print_debug_info(s, s->current_picture_ptr);
719 } else if (s->last_picture_ptr != NULL) {
720 if ((ret = av_frame_ref(pict, &s->last_picture_ptr->f)) < 0)
722 ff_print_debug_info(s, s->last_picture_ptr);
725 if (s->last_picture_ptr || s->low_delay) {
729 // so we can detect if frame_end was not called (find some nicer solution...)
730 s->current_picture_ptr = NULL;
736 AVCodec ff_rv10_decoder = {
738 .type = AVMEDIA_TYPE_VIDEO,
739 .id = AV_CODEC_ID_RV10,
740 .priv_data_size = sizeof(RVDecContext),
741 .init = rv10_decode_init,
742 .close = rv10_decode_end,
743 .decode = rv10_decode_frame,
744 .capabilities = CODEC_CAP_DR1,
745 .long_name = NULL_IF_CONFIG_SMALL("RealVideo 1.0"),
746 .pix_fmts = ff_pixfmt_list_420,
749 AVCodec ff_rv20_decoder = {
751 .type = AVMEDIA_TYPE_VIDEO,
752 .id = AV_CODEC_ID_RV20,
753 .priv_data_size = sizeof(RVDecContext),
754 .init = rv10_decode_init,
755 .close = rv10_decode_end,
756 .decode = rv10_decode_frame,
757 .capabilities = CODEC_CAP_DR1 | CODEC_CAP_DELAY,
758 .flush = ff_mpeg_flush,
759 .long_name = NULL_IF_CONFIG_SMALL("RealVideo 2.0"),
760 .pix_fmts = ff_pixfmt_list_420,