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
30 #include "libavutil/imgutils.h"
33 #include "error_resilience.h"
37 #include "mpegvideo.h"
38 #include "mpeg4video.h"
40 #define RV_GET_MAJOR_VER(x) ((x) >> 28)
41 #define RV_GET_MINOR_VER(x) (((x) >> 20) & 0xFF)
42 #define RV_GET_MICRO_VER(x) (((x) >> 12) & 0xFF)
44 #define DC_VLC_BITS 14 // FIXME find a better solution
46 typedef struct RVDecContext {
51 static const uint16_t rv_lum_code[256] = {
52 0x3e7f, 0x0f00, 0x0f01, 0x0f02, 0x0f03, 0x0f04, 0x0f05, 0x0f06,
53 0x0f07, 0x0f08, 0x0f09, 0x0f0a, 0x0f0b, 0x0f0c, 0x0f0d, 0x0f0e,
54 0x0f0f, 0x0f10, 0x0f11, 0x0f12, 0x0f13, 0x0f14, 0x0f15, 0x0f16,
55 0x0f17, 0x0f18, 0x0f19, 0x0f1a, 0x0f1b, 0x0f1c, 0x0f1d, 0x0f1e,
56 0x0f1f, 0x0f20, 0x0f21, 0x0f22, 0x0f23, 0x0f24, 0x0f25, 0x0f26,
57 0x0f27, 0x0f28, 0x0f29, 0x0f2a, 0x0f2b, 0x0f2c, 0x0f2d, 0x0f2e,
58 0x0f2f, 0x0f30, 0x0f31, 0x0f32, 0x0f33, 0x0f34, 0x0f35, 0x0f36,
59 0x0f37, 0x0f38, 0x0f39, 0x0f3a, 0x0f3b, 0x0f3c, 0x0f3d, 0x0f3e,
60 0x0f3f, 0x0380, 0x0381, 0x0382, 0x0383, 0x0384, 0x0385, 0x0386,
61 0x0387, 0x0388, 0x0389, 0x038a, 0x038b, 0x038c, 0x038d, 0x038e,
62 0x038f, 0x0390, 0x0391, 0x0392, 0x0393, 0x0394, 0x0395, 0x0396,
63 0x0397, 0x0398, 0x0399, 0x039a, 0x039b, 0x039c, 0x039d, 0x039e,
64 0x039f, 0x00c0, 0x00c1, 0x00c2, 0x00c3, 0x00c4, 0x00c5, 0x00c6,
65 0x00c7, 0x00c8, 0x00c9, 0x00ca, 0x00cb, 0x00cc, 0x00cd, 0x00ce,
66 0x00cf, 0x0050, 0x0051, 0x0052, 0x0053, 0x0054, 0x0055, 0x0056,
67 0x0057, 0x0020, 0x0021, 0x0022, 0x0023, 0x000c, 0x000d, 0x0004,
68 0x0000, 0x0005, 0x000e, 0x000f, 0x0024, 0x0025, 0x0026, 0x0027,
69 0x0058, 0x0059, 0x005a, 0x005b, 0x005c, 0x005d, 0x005e, 0x005f,
70 0x00d0, 0x00d1, 0x00d2, 0x00d3, 0x00d4, 0x00d5, 0x00d6, 0x00d7,
71 0x00d8, 0x00d9, 0x00da, 0x00db, 0x00dc, 0x00dd, 0x00de, 0x00df,
72 0x03a0, 0x03a1, 0x03a2, 0x03a3, 0x03a4, 0x03a5, 0x03a6, 0x03a7,
73 0x03a8, 0x03a9, 0x03aa, 0x03ab, 0x03ac, 0x03ad, 0x03ae, 0x03af,
74 0x03b0, 0x03b1, 0x03b2, 0x03b3, 0x03b4, 0x03b5, 0x03b6, 0x03b7,
75 0x03b8, 0x03b9, 0x03ba, 0x03bb, 0x03bc, 0x03bd, 0x03be, 0x03bf,
76 0x0f40, 0x0f41, 0x0f42, 0x0f43, 0x0f44, 0x0f45, 0x0f46, 0x0f47,
77 0x0f48, 0x0f49, 0x0f4a, 0x0f4b, 0x0f4c, 0x0f4d, 0x0f4e, 0x0f4f,
78 0x0f50, 0x0f51, 0x0f52, 0x0f53, 0x0f54, 0x0f55, 0x0f56, 0x0f57,
79 0x0f58, 0x0f59, 0x0f5a, 0x0f5b, 0x0f5c, 0x0f5d, 0x0f5e, 0x0f5f,
80 0x0f60, 0x0f61, 0x0f62, 0x0f63, 0x0f64, 0x0f65, 0x0f66, 0x0f67,
81 0x0f68, 0x0f69, 0x0f6a, 0x0f6b, 0x0f6c, 0x0f6d, 0x0f6e, 0x0f6f,
82 0x0f70, 0x0f71, 0x0f72, 0x0f73, 0x0f74, 0x0f75, 0x0f76, 0x0f77,
83 0x0f78, 0x0f79, 0x0f7a, 0x0f7b, 0x0f7c, 0x0f7d, 0x0f7e, 0x0f7f,
86 static const uint8_t rv_lum_bits[256] = {
87 14, 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, 12, 12, 12, 12, 12, 12, 12,
95 12, 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, 10, 10, 10, 10, 10, 10, 10,
99 10, 8, 8, 8, 8, 8, 8, 8,
100 8, 8, 8, 8, 8, 8, 8, 8,
101 8, 7, 7, 7, 7, 7, 7, 7,
102 7, 6, 6, 6, 6, 5, 5, 4,
103 2, 4, 5, 5, 6, 6, 6, 6,
104 7, 7, 7, 7, 7, 7, 7, 7,
105 8, 8, 8, 8, 8, 8, 8, 8,
106 8, 8, 8, 8, 8, 8, 8, 8,
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 10, 10, 10, 10, 10, 10, 10, 10,
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,
118 12, 12, 12, 12, 12, 12, 12, 12,
121 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] = {
157 16, 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, 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, 12, 12, 12, 12, 12, 12, 12,
166 12, 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, 10, 10, 10, 10, 10, 10, 10,
170 10, 10, 10, 10, 10, 10, 10, 10,
171 10, 8, 8, 8, 8, 8, 8, 8,
172 8, 6, 6, 6, 6, 4, 4, 3,
173 2, 3, 4, 4, 6, 6, 6, 6,
174 8, 8, 8, 8, 8, 8, 8, 8,
175 10, 10, 10, 10, 10, 10, 10, 10,
176 10, 10, 10, 10, 10, 10, 10, 10,
177 12, 12, 12, 12, 12, 12, 12, 12,
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 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,
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,
191 static VLC rv_dc_lum, rv_dc_chrom;
193 int ff_rv_decode_dc(MpegEncContext *s, int n)
198 code = get_vlc2(&s->gb, rv_dc_lum.table, DC_VLC_BITS, 2);
200 /* XXX: I don't understand why they use LONGER codes than
201 * necessary. The following code would be completely useless
202 * if they had thought about it !!! */
203 code = get_bits(&s->gb, 7);
205 code = (int8_t) (get_bits(&s->gb, 7) + 1);
206 } else if (code == 0x7d) {
207 code = -128 + get_bits(&s->gb, 7);
208 } else if (code == 0x7e) {
209 if (get_bits1(&s->gb) == 0)
210 code = (int8_t) (get_bits(&s->gb, 8) + 1);
212 code = (int8_t) (get_bits(&s->gb, 8));
213 } else if (code == 0x7f) {
214 skip_bits(&s->gb, 11);
221 code = get_vlc2(&s->gb, rv_dc_chrom.table, DC_VLC_BITS, 2);
224 code = get_bits(&s->gb, 9);
226 code = (int8_t) (get_bits(&s->gb, 7) + 1);
227 } else if (code == 0x1fd) {
228 code = -128 + get_bits(&s->gb, 7);
229 } else if (code == 0x1fe) {
230 skip_bits(&s->gb, 9);
233 av_log(s->avctx, AV_LOG_ERROR, "chroma dc error\n");
243 /* read RV 1.0 compatible frame header */
244 static int rv10_decode_picture_header(MpegEncContext *s)
246 int mb_count, pb_frame, marker, mb_xy;
248 marker = get_bits1(&s->gb);
250 if (get_bits1(&s->gb))
251 s->pict_type = AV_PICTURE_TYPE_P;
253 s->pict_type = AV_PICTURE_TYPE_I;
256 av_log(s->avctx, AV_LOG_ERROR, "marker missing\n");
258 pb_frame = get_bits1(&s->gb);
260 av_dlog(s->avctx, "pict_type=%d pb_frame=%d\n", s->pict_type, pb_frame);
263 avpriv_request_sample(s->avctx, "pb frame");
264 return AVERROR_PATCHWELCOME;
267 s->qscale = get_bits(&s->gb, 5);
268 if (s->qscale == 0) {
269 av_log(s->avctx, AV_LOG_ERROR, "Invalid qscale value: 0\n");
270 return AVERROR_INVALIDDATA;
273 if (s->pict_type == AV_PICTURE_TYPE_I) {
274 if (s->rv10_version == 3) {
275 /* specific MPEG like DC coding not used */
276 s->last_dc[0] = get_bits(&s->gb, 8);
277 s->last_dc[1] = get_bits(&s->gb, 8);
278 s->last_dc[2] = get_bits(&s->gb, 8);
279 av_dlog(s->avctx, "DC:%d %d %d\n", s->last_dc[0],
280 s->last_dc[1], s->last_dc[2]);
283 /* if multiple packets per frame are sent, the position at which
284 * to display the macroblocks is coded here */
286 mb_xy = s->mb_x + s->mb_y * s->mb_width;
287 if (show_bits(&s->gb, 12) == 0 || (mb_xy && mb_xy < s->mb_num)) {
288 s->mb_x = get_bits(&s->gb, 6); /* mb_x */
289 s->mb_y = get_bits(&s->gb, 6); /* mb_y */
290 mb_count = get_bits(&s->gb, 12);
294 mb_count = s->mb_width * s->mb_height;
296 skip_bits(&s->gb, 3); /* ignored */
298 s->unrestricted_mv = 1;
303 static int rv20_decode_picture_header(RVDecContext *rv)
305 MpegEncContext *s = &rv->m;
306 int seq, mb_pos, i, ret;
309 i = get_bits(&s->gb, 2);
312 s->pict_type = AV_PICTURE_TYPE_I;
315 s->pict_type = AV_PICTURE_TYPE_I;
318 s->pict_type = AV_PICTURE_TYPE_P;
321 s->pict_type = AV_PICTURE_TYPE_B;
324 av_log(s->avctx, AV_LOG_ERROR, "unknown frame type\n");
325 return AVERROR_INVALIDDATA;
328 if (s->last_picture_ptr == NULL && s->pict_type == AV_PICTURE_TYPE_B) {
329 av_log(s->avctx, AV_LOG_ERROR, "early B-frame\n");
330 return AVERROR_INVALIDDATA;
333 if (get_bits1(&s->gb)) {
334 av_log(s->avctx, AV_LOG_ERROR, "reserved bit set\n");
335 return AVERROR_INVALIDDATA;
338 s->qscale = get_bits(&s->gb, 5);
339 if (s->qscale == 0) {
340 av_log(s->avctx, AV_LOG_ERROR, "Invalid qscale value: 0\n");
341 return AVERROR_INVALIDDATA;
344 if (RV_GET_MINOR_VER(rv->sub_id) >= 2)
345 s->loop_filter = get_bits1(&s->gb);
347 if (RV_GET_MINOR_VER(rv->sub_id) <= 1)
348 seq = get_bits(&s->gb, 8) << 7;
350 seq = get_bits(&s->gb, 13) << 2;
352 rpr_bits = s->avctx->extradata[1] & 7;
355 rpr_bits = FFMIN((rpr_bits >> 1) + 1, 3);
357 f = get_bits(&s->gb, rpr_bits);
360 if (s->avctx->extradata_size < 8 + 2 * f) {
361 av_log(s->avctx, AV_LOG_ERROR, "Extradata too small.\n");
362 return AVERROR_INVALIDDATA;
365 new_w = 4 * ((uint8_t *) s->avctx->extradata)[6 + 2 * f];
366 new_h = 4 * ((uint8_t *) s->avctx->extradata)[7 + 2 * f];
368 new_w = s->orig_width;
369 new_h = s->orig_height;
371 if (new_w != s->width || new_h != s->height) {
372 av_log(s->avctx, AV_LOG_DEBUG,
373 "attempting to change resolution to %dx%d\n", new_w, new_h);
374 ff_MPV_common_end(s);
376 ret = ff_set_dimensions(s->avctx, new_w, new_h);
382 if ((ret = ff_MPV_common_init(s)) < 0)
386 if (s->avctx->debug & FF_DEBUG_PICT_INFO) {
387 av_log(s->avctx, AV_LOG_DEBUG, "F %d/%d\n", f, rpr_bits);
389 } else if (av_image_check_size(s->width, s->height, 0, s->avctx) < 0)
390 return AVERROR_INVALIDDATA;
392 mb_pos = ff_h263_decode_mba(s);
394 seq |= s->time & ~0x7FFF;
395 if (seq - s->time > 0x4000)
397 if (seq - s->time < -0x4000)
400 if (seq != s->time) {
401 if (s->pict_type != AV_PICTURE_TYPE_B) {
403 s->pp_time = s->time - s->last_non_b_time;
404 s->last_non_b_time = s->time;
407 s->pb_time = s->pp_time - (s->last_non_b_time - s->time);
408 if (s->pp_time <= s->pb_time ||
409 s->pp_time <= s->pp_time - s->pb_time || s->pp_time <= 0) {
410 av_log(s->avctx, AV_LOG_DEBUG, "messed up order, possible "
411 "from seeking? skipping current b frame\n");
412 return FRAME_SKIPPED;
414 ff_mpeg4_init_direct_mv(s);
418 s->no_rounding = get_bits1(&s->gb);
420 if (RV_GET_MINOR_VER(rv->sub_id) <= 1 && s->pict_type == AV_PICTURE_TYPE_B)
421 // binary decoder reads 3+2 bits here but they don't seem to be used
422 skip_bits(&s->gb, 5);
425 s->unrestricted_mv = 1;
426 s->h263_aic = s->pict_type == AV_PICTURE_TYPE_I;
427 s->modified_quant = 1;
430 if (s->avctx->debug & FF_DEBUG_PICT_INFO) {
431 av_log(s->avctx, AV_LOG_INFO,
432 "num:%5d x:%2d y:%2d type:%d qscale:%2d rnd:%d\n",
433 seq, s->mb_x, s->mb_y, s->pict_type, s->qscale,
437 assert(s->pict_type != AV_PICTURE_TYPE_B || !s->low_delay);
439 return s->mb_width * s->mb_height - mb_pos;
442 static av_cold int rv10_decode_init(AVCodecContext *avctx)
444 RVDecContext *rv = avctx->priv_data;
445 MpegEncContext *s = &rv->m;
447 int major_ver, minor_ver, micro_ver, ret;
449 if (avctx->extradata_size < 8) {
450 av_log(avctx, AV_LOG_ERROR, "Extradata is too small.\n");
451 return AVERROR_INVALIDDATA;
453 if ((ret = av_image_check_size(avctx->coded_width,
454 avctx->coded_height, 0, avctx)) < 0)
457 ff_MPV_decode_defaults(s);
460 s->out_format = FMT_H263;
461 s->codec_id = avctx->codec_id;
464 s->width = avctx->coded_width;
466 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 avctx->extradata_size >= 4 ? ((int *) avctx->extradata)[0] : -1);
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, const uint8_t *buf,
529 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 av_log(s->avctx, AV_LOG_ERROR, "HEADER ERROR\n");
543 return AVERROR_INVALIDDATA;
546 if (s->mb_x >= s->mb_width ||
547 s->mb_y >= s->mb_height) {
548 av_log(s->avctx, AV_LOG_ERROR, "POS ERROR %d %d\n", s->mb_x, s->mb_y);
549 return AVERROR_INVALIDDATA;
551 mb_pos = s->mb_y * s->mb_width + s->mb_x;
552 left = s->mb_width * s->mb_height - mb_pos;
553 if (mb_count > left) {
554 av_log(s->avctx, AV_LOG_ERROR, "COUNT ERROR\n");
555 return AVERROR_INVALIDDATA;
558 if ((s->mb_x == 0 && s->mb_y == 0) || s->current_picture_ptr == NULL) {
559 // FIXME write parser so we always have complete frames?
560 if (s->current_picture_ptr) {
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;
575 av_dlog(avctx, "qscale=%d\n", s->qscale);
577 /* default quantization values */
578 if (s->codec_id == AV_CODEC_ID_RV10) {
580 s->first_slice_line = 1;
582 s->first_slice_line = 1;
583 s->resync_mb_x = s->mb_x;
585 start_mb_x = s->mb_x;
586 s->resync_mb_y = s->mb_y;
588 s->y_dc_scale_table =
589 s->c_dc_scale_table = ff_aic_dc_scale_table;
591 s->y_dc_scale_table =
592 s->c_dc_scale_table = ff_mpeg1_dc_scale_table;
595 if (s->modified_quant)
596 s->chroma_qscale_table = ff_h263_chroma_qscale_table;
598 ff_set_qscale(s, s->qscale);
600 s->rv10_first_dc_coded[0] = 0;
601 s->rv10_first_dc_coded[1] = 0;
602 s->rv10_first_dc_coded[2] = 0;
606 s->block_wrap[3] = s->b8_stride;
608 s->block_wrap[5] = s->mb_stride;
609 ff_init_block_index(s);
611 /* decode each macroblock */
612 for (s->mb_num_left = mb_count; s->mb_num_left > 0; s->mb_num_left--) {
614 ff_update_block_index(s);
615 av_dlog(avctx, "**mb x=%d y=%d\n", s->mb_x, s->mb_y);
617 s->mv_dir = MV_DIR_FORWARD;
618 s->mv_type = MV_TYPE_16X16;
619 ret = ff_h263_decode_mb(s, s->block);
621 // Repeat the slice end check from ff_h263_decode_mb with our active
623 if (ret != SLICE_ERROR) {
624 int v = show_bits(&s->gb, 16);
626 if (get_bits_count(&s->gb) + 16 > active_bits_size)
627 v >>= get_bits_count(&s->gb) + 16 - active_bits_size;
632 if (ret != SLICE_ERROR && active_bits_size < get_bits_count(&s->gb) &&
633 8 * buf_size2 >= get_bits_count(&s->gb)) {
634 active_bits_size = buf_size2 * 8;
635 av_log(avctx, AV_LOG_DEBUG, "update size from %d to %d\n",
636 8 * buf_size, active_bits_size);
640 if (ret == SLICE_ERROR || active_bits_size < get_bits_count(&s->gb)) {
641 av_log(s->avctx, AV_LOG_ERROR, "ERROR at MB %d %d\n", s->mb_x,
643 return AVERROR_INVALIDDATA;
645 if (s->pict_type != AV_PICTURE_TYPE_B)
646 ff_h263_update_motion_val(s);
647 ff_MPV_decode_mb(s, s->block);
649 ff_h263_loop_filter(s);
651 if (++s->mb_x == s->mb_width) {
654 ff_init_block_index(s);
656 if (s->mb_x == s->resync_mb_x)
657 s->first_slice_line = 0;
658 if (ret == SLICE_END)
662 ff_er_add_slice(&s->er, start_mb_x, s->resync_mb_y, s->mb_x - 1, s->mb_y,
665 return active_bits_size;
668 static int get_slice_offset(AVCodecContext *avctx, const uint8_t *buf, int n)
670 if (avctx->slice_count)
671 return avctx->slice_offset[n];
673 return AV_RL32(buf + n * 8);
676 static int rv10_decode_frame(AVCodecContext *avctx, void *data, int *got_frame,
679 const uint8_t *buf = avpkt->data;
680 int buf_size = avpkt->size;
681 MpegEncContext *s = avctx->priv_data;
682 AVFrame *pict = data;
685 const uint8_t *slices_hdr = NULL;
687 av_dlog(avctx, "*****frame %d size=%d\n", avctx->frame_number, buf_size);
689 /* no supplementary picture */
694 if (!avctx->slice_count) {
695 slice_count = (*buf++) + 1;
698 if (!slice_count || buf_size <= 8 * slice_count) {
699 av_log(avctx, AV_LOG_ERROR, "Invalid slice count: %d.\n",
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 ((ret = rv10_decode_packet(avctx, buf + offset, size, size2)) < 0)
738 if (s->current_picture_ptr != NULL && s->mb_y >= s->mb_height) {
739 ff_er_frame_end(&s->er);
742 if (s->pict_type == AV_PICTURE_TYPE_B || s->low_delay) {
743 if ((ret = av_frame_ref(pict, s->current_picture_ptr->f)) < 0)
745 ff_print_debug_info(s, s->current_picture_ptr);
746 } else if (s->last_picture_ptr != NULL) {
747 if ((ret = av_frame_ref(pict, s->last_picture_ptr->f)) < 0)
749 ff_print_debug_info(s, s->last_picture_ptr);
752 if (s->last_picture_ptr || s->low_delay) {
756 // so we can detect if frame_end was not called (find some nicer solution...)
757 s->current_picture_ptr = NULL;
763 AVCodec ff_rv10_decoder = {
765 .long_name = NULL_IF_CONFIG_SMALL("RealVideo 1.0"),
766 .type = AVMEDIA_TYPE_VIDEO,
767 .id = AV_CODEC_ID_RV10,
768 .priv_data_size = sizeof(RVDecContext),
769 .init = rv10_decode_init,
770 .close = rv10_decode_end,
771 .decode = rv10_decode_frame,
772 .capabilities = CODEC_CAP_DR1,
773 .pix_fmts = (const enum AVPixelFormat[]) {
779 AVCodec ff_rv20_decoder = {
781 .long_name = NULL_IF_CONFIG_SMALL("RealVideo 2.0"),
782 .type = AVMEDIA_TYPE_VIDEO,
783 .id = AV_CODEC_ID_RV20,
784 .priv_data_size = sizeof(RVDecContext),
785 .init = rv10_decode_init,
786 .close = rv10_decode_end,
787 .decode = rv10_decode_frame,
788 .capabilities = CODEC_CAP_DR1 | CODEC_CAP_DELAY,
789 .flush = ff_mpeg_flush,
790 .pix_fmts = (const enum AVPixelFormat[]) {