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
30 #include "libavutil/imgutils.h"
33 #include "error_resilience.h"
38 #include "mpegutils.h"
39 #include "mpegvideo.h"
40 #include "mpeg4video.h"
41 #include "mpegvideodata.h"
44 #define RV_GET_MAJOR_VER(x) ((x) >> 28)
45 #define RV_GET_MINOR_VER(x) (((x) >> 20) & 0xFF)
46 #define RV_GET_MICRO_VER(x) (((x) >> 12) & 0xFF)
48 #define DC_VLC_BITS 14 // FIXME find a better solution
50 typedef struct RVDecContext {
53 int orig_width, orig_height;
56 static const uint16_t rv_lum_code[256] = {
57 0x3e7f, 0x0f00, 0x0f01, 0x0f02, 0x0f03, 0x0f04, 0x0f05, 0x0f06,
58 0x0f07, 0x0f08, 0x0f09, 0x0f0a, 0x0f0b, 0x0f0c, 0x0f0d, 0x0f0e,
59 0x0f0f, 0x0f10, 0x0f11, 0x0f12, 0x0f13, 0x0f14, 0x0f15, 0x0f16,
60 0x0f17, 0x0f18, 0x0f19, 0x0f1a, 0x0f1b, 0x0f1c, 0x0f1d, 0x0f1e,
61 0x0f1f, 0x0f20, 0x0f21, 0x0f22, 0x0f23, 0x0f24, 0x0f25, 0x0f26,
62 0x0f27, 0x0f28, 0x0f29, 0x0f2a, 0x0f2b, 0x0f2c, 0x0f2d, 0x0f2e,
63 0x0f2f, 0x0f30, 0x0f31, 0x0f32, 0x0f33, 0x0f34, 0x0f35, 0x0f36,
64 0x0f37, 0x0f38, 0x0f39, 0x0f3a, 0x0f3b, 0x0f3c, 0x0f3d, 0x0f3e,
65 0x0f3f, 0x0380, 0x0381, 0x0382, 0x0383, 0x0384, 0x0385, 0x0386,
66 0x0387, 0x0388, 0x0389, 0x038a, 0x038b, 0x038c, 0x038d, 0x038e,
67 0x038f, 0x0390, 0x0391, 0x0392, 0x0393, 0x0394, 0x0395, 0x0396,
68 0x0397, 0x0398, 0x0399, 0x039a, 0x039b, 0x039c, 0x039d, 0x039e,
69 0x039f, 0x00c0, 0x00c1, 0x00c2, 0x00c3, 0x00c4, 0x00c5, 0x00c6,
70 0x00c7, 0x00c8, 0x00c9, 0x00ca, 0x00cb, 0x00cc, 0x00cd, 0x00ce,
71 0x00cf, 0x0050, 0x0051, 0x0052, 0x0053, 0x0054, 0x0055, 0x0056,
72 0x0057, 0x0020, 0x0021, 0x0022, 0x0023, 0x000c, 0x000d, 0x0004,
73 0x0000, 0x0005, 0x000e, 0x000f, 0x0024, 0x0025, 0x0026, 0x0027,
74 0x0058, 0x0059, 0x005a, 0x005b, 0x005c, 0x005d, 0x005e, 0x005f,
75 0x00d0, 0x00d1, 0x00d2, 0x00d3, 0x00d4, 0x00d5, 0x00d6, 0x00d7,
76 0x00d8, 0x00d9, 0x00da, 0x00db, 0x00dc, 0x00dd, 0x00de, 0x00df,
77 0x03a0, 0x03a1, 0x03a2, 0x03a3, 0x03a4, 0x03a5, 0x03a6, 0x03a7,
78 0x03a8, 0x03a9, 0x03aa, 0x03ab, 0x03ac, 0x03ad, 0x03ae, 0x03af,
79 0x03b0, 0x03b1, 0x03b2, 0x03b3, 0x03b4, 0x03b5, 0x03b6, 0x03b7,
80 0x03b8, 0x03b9, 0x03ba, 0x03bb, 0x03bc, 0x03bd, 0x03be, 0x03bf,
81 0x0f40, 0x0f41, 0x0f42, 0x0f43, 0x0f44, 0x0f45, 0x0f46, 0x0f47,
82 0x0f48, 0x0f49, 0x0f4a, 0x0f4b, 0x0f4c, 0x0f4d, 0x0f4e, 0x0f4f,
83 0x0f50, 0x0f51, 0x0f52, 0x0f53, 0x0f54, 0x0f55, 0x0f56, 0x0f57,
84 0x0f58, 0x0f59, 0x0f5a, 0x0f5b, 0x0f5c, 0x0f5d, 0x0f5e, 0x0f5f,
85 0x0f60, 0x0f61, 0x0f62, 0x0f63, 0x0f64, 0x0f65, 0x0f66, 0x0f67,
86 0x0f68, 0x0f69, 0x0f6a, 0x0f6b, 0x0f6c, 0x0f6d, 0x0f6e, 0x0f6f,
87 0x0f70, 0x0f71, 0x0f72, 0x0f73, 0x0f74, 0x0f75, 0x0f76, 0x0f77,
88 0x0f78, 0x0f79, 0x0f7a, 0x0f7b, 0x0f7c, 0x0f7d, 0x0f7e, 0x0f7f,
91 static const uint8_t rv_lum_bits[256] = {
92 14, 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, 12, 12, 12, 12, 12, 12, 12,
96 12, 12, 12, 12, 12, 12, 12, 12,
97 12, 12, 12, 12, 12, 12, 12, 12,
98 12, 12, 12, 12, 12, 12, 12, 12,
99 12, 12, 12, 12, 12, 12, 12, 12,
100 12, 10, 10, 10, 10, 10, 10, 10,
101 10, 10, 10, 10, 10, 10, 10, 10,
102 10, 10, 10, 10, 10, 10, 10, 10,
103 10, 10, 10, 10, 10, 10, 10, 10,
104 10, 8, 8, 8, 8, 8, 8, 8,
105 8, 8, 8, 8, 8, 8, 8, 8,
106 8, 7, 7, 7, 7, 7, 7, 7,
107 7, 6, 6, 6, 6, 5, 5, 4,
108 2, 4, 5, 5, 6, 6, 6, 6,
109 7, 7, 7, 7, 7, 7, 7, 7,
110 8, 8, 8, 8, 8, 8, 8, 8,
111 8, 8, 8, 8, 8, 8, 8, 8,
112 10, 10, 10, 10, 10, 10, 10, 10,
113 10, 10, 10, 10, 10, 10, 10, 10,
114 10, 10, 10, 10, 10, 10, 10, 10,
115 10, 10, 10, 10, 10, 10, 10, 10,
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,
119 12, 12, 12, 12, 12, 12, 12, 12,
120 12, 12, 12, 12, 12, 12, 12, 12,
121 12, 12, 12, 12, 12, 12, 12, 12,
122 12, 12, 12, 12, 12, 12, 12, 12,
123 12, 12, 12, 12, 12, 12, 12, 12,
126 static const uint16_t rv_chrom_code[256] = {
127 0xfe7f, 0x3f00, 0x3f01, 0x3f02, 0x3f03, 0x3f04, 0x3f05, 0x3f06,
128 0x3f07, 0x3f08, 0x3f09, 0x3f0a, 0x3f0b, 0x3f0c, 0x3f0d, 0x3f0e,
129 0x3f0f, 0x3f10, 0x3f11, 0x3f12, 0x3f13, 0x3f14, 0x3f15, 0x3f16,
130 0x3f17, 0x3f18, 0x3f19, 0x3f1a, 0x3f1b, 0x3f1c, 0x3f1d, 0x3f1e,
131 0x3f1f, 0x3f20, 0x3f21, 0x3f22, 0x3f23, 0x3f24, 0x3f25, 0x3f26,
132 0x3f27, 0x3f28, 0x3f29, 0x3f2a, 0x3f2b, 0x3f2c, 0x3f2d, 0x3f2e,
133 0x3f2f, 0x3f30, 0x3f31, 0x3f32, 0x3f33, 0x3f34, 0x3f35, 0x3f36,
134 0x3f37, 0x3f38, 0x3f39, 0x3f3a, 0x3f3b, 0x3f3c, 0x3f3d, 0x3f3e,
135 0x3f3f, 0x0f80, 0x0f81, 0x0f82, 0x0f83, 0x0f84, 0x0f85, 0x0f86,
136 0x0f87, 0x0f88, 0x0f89, 0x0f8a, 0x0f8b, 0x0f8c, 0x0f8d, 0x0f8e,
137 0x0f8f, 0x0f90, 0x0f91, 0x0f92, 0x0f93, 0x0f94, 0x0f95, 0x0f96,
138 0x0f97, 0x0f98, 0x0f99, 0x0f9a, 0x0f9b, 0x0f9c, 0x0f9d, 0x0f9e,
139 0x0f9f, 0x03c0, 0x03c1, 0x03c2, 0x03c3, 0x03c4, 0x03c5, 0x03c6,
140 0x03c7, 0x03c8, 0x03c9, 0x03ca, 0x03cb, 0x03cc, 0x03cd, 0x03ce,
141 0x03cf, 0x00e0, 0x00e1, 0x00e2, 0x00e3, 0x00e4, 0x00e5, 0x00e6,
142 0x00e7, 0x0030, 0x0031, 0x0032, 0x0033, 0x0008, 0x0009, 0x0002,
143 0x0000, 0x0003, 0x000a, 0x000b, 0x0034, 0x0035, 0x0036, 0x0037,
144 0x00e8, 0x00e9, 0x00ea, 0x00eb, 0x00ec, 0x00ed, 0x00ee, 0x00ef,
145 0x03d0, 0x03d1, 0x03d2, 0x03d3, 0x03d4, 0x03d5, 0x03d6, 0x03d7,
146 0x03d8, 0x03d9, 0x03da, 0x03db, 0x03dc, 0x03dd, 0x03de, 0x03df,
147 0x0fa0, 0x0fa1, 0x0fa2, 0x0fa3, 0x0fa4, 0x0fa5, 0x0fa6, 0x0fa7,
148 0x0fa8, 0x0fa9, 0x0faa, 0x0fab, 0x0fac, 0x0fad, 0x0fae, 0x0faf,
149 0x0fb0, 0x0fb1, 0x0fb2, 0x0fb3, 0x0fb4, 0x0fb5, 0x0fb6, 0x0fb7,
150 0x0fb8, 0x0fb9, 0x0fba, 0x0fbb, 0x0fbc, 0x0fbd, 0x0fbe, 0x0fbf,
151 0x3f40, 0x3f41, 0x3f42, 0x3f43, 0x3f44, 0x3f45, 0x3f46, 0x3f47,
152 0x3f48, 0x3f49, 0x3f4a, 0x3f4b, 0x3f4c, 0x3f4d, 0x3f4e, 0x3f4f,
153 0x3f50, 0x3f51, 0x3f52, 0x3f53, 0x3f54, 0x3f55, 0x3f56, 0x3f57,
154 0x3f58, 0x3f59, 0x3f5a, 0x3f5b, 0x3f5c, 0x3f5d, 0x3f5e, 0x3f5f,
155 0x3f60, 0x3f61, 0x3f62, 0x3f63, 0x3f64, 0x3f65, 0x3f66, 0x3f67,
156 0x3f68, 0x3f69, 0x3f6a, 0x3f6b, 0x3f6c, 0x3f6d, 0x3f6e, 0x3f6f,
157 0x3f70, 0x3f71, 0x3f72, 0x3f73, 0x3f74, 0x3f75, 0x3f76, 0x3f77,
158 0x3f78, 0x3f79, 0x3f7a, 0x3f7b, 0x3f7c, 0x3f7d, 0x3f7e, 0x3f7f,
161 static const uint8_t rv_chrom_bits[256] = {
162 16, 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, 14, 14, 14, 14, 14, 14, 14,
166 14, 14, 14, 14, 14, 14, 14, 14,
167 14, 14, 14, 14, 14, 14, 14, 14,
168 14, 14, 14, 14, 14, 14, 14, 14,
169 14, 14, 14, 14, 14, 14, 14, 14,
170 14, 12, 12, 12, 12, 12, 12, 12,
171 12, 12, 12, 12, 12, 12, 12, 12,
172 12, 12, 12, 12, 12, 12, 12, 12,
173 12, 12, 12, 12, 12, 12, 12, 12,
174 12, 10, 10, 10, 10, 10, 10, 10,
175 10, 10, 10, 10, 10, 10, 10, 10,
176 10, 8, 8, 8, 8, 8, 8, 8,
177 8, 6, 6, 6, 6, 4, 4, 3,
178 2, 3, 4, 4, 6, 6, 6, 6,
179 8, 8, 8, 8, 8, 8, 8, 8,
180 10, 10, 10, 10, 10, 10, 10, 10,
181 10, 10, 10, 10, 10, 10, 10, 10,
182 12, 12, 12, 12, 12, 12, 12, 12,
183 12, 12, 12, 12, 12, 12, 12, 12,
184 12, 12, 12, 12, 12, 12, 12, 12,
185 12, 12, 12, 12, 12, 12, 12, 12,
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,
189 14, 14, 14, 14, 14, 14, 14, 14,
190 14, 14, 14, 14, 14, 14, 14, 14,
191 14, 14, 14, 14, 14, 14, 14, 14,
192 14, 14, 14, 14, 14, 14, 14, 14,
193 14, 14, 14, 14, 14, 14, 14, 14,
196 static VLC rv_dc_lum, rv_dc_chrom;
198 int ff_rv_decode_dc(MpegEncContext *s, int n)
203 code = get_vlc2(&s->gb, rv_dc_lum.table, DC_VLC_BITS, 2);
205 /* XXX: I don't understand why they use LONGER codes than
206 * necessary. The following code would be completely useless
207 * if they had thought about it !!! */
208 code = get_bits(&s->gb, 7);
210 code = (int8_t) (get_bits(&s->gb, 7) + 1);
211 } else if (code == 0x7d) {
212 code = -128 + get_bits(&s->gb, 7);
213 } else if (code == 0x7e) {
214 if (get_bits1(&s->gb) == 0)
215 code = (int8_t) (get_bits(&s->gb, 8) + 1);
217 code = (int8_t) (get_bits(&s->gb, 8));
218 } else if (code == 0x7f) {
219 skip_bits(&s->gb, 11);
226 code = get_vlc2(&s->gb, rv_dc_chrom.table, DC_VLC_BITS, 2);
229 code = get_bits(&s->gb, 9);
231 code = (int8_t) (get_bits(&s->gb, 7) + 1);
232 } else if (code == 0x1fd) {
233 code = -128 + get_bits(&s->gb, 7);
234 } else if (code == 0x1fe) {
235 skip_bits(&s->gb, 9);
238 av_log(s->avctx, AV_LOG_ERROR, "chroma dc error\n");
248 /* read RV 1.0 compatible frame header */
249 static int rv10_decode_picture_header(MpegEncContext *s)
251 int mb_count, pb_frame, marker, mb_xy;
253 marker = get_bits1(&s->gb);
255 if (get_bits1(&s->gb))
256 s->pict_type = AV_PICTURE_TYPE_P;
258 s->pict_type = AV_PICTURE_TYPE_I;
261 av_log(s->avctx, AV_LOG_ERROR, "marker missing\n");
263 pb_frame = get_bits1(&s->gb);
265 ff_dlog(s->avctx, "pict_type=%d pb_frame=%d\n", s->pict_type, pb_frame);
268 avpriv_request_sample(s->avctx, "PB-frame");
269 return AVERROR_PATCHWELCOME;
272 s->qscale = get_bits(&s->gb, 5);
273 if (s->qscale == 0) {
274 av_log(s->avctx, AV_LOG_ERROR, "Invalid qscale value: 0\n");
275 return AVERROR_INVALIDDATA;
278 if (s->pict_type == AV_PICTURE_TYPE_I) {
279 if (s->rv10_version == 3) {
280 /* specific MPEG like DC coding not used */
281 s->last_dc[0] = get_bits(&s->gb, 8);
282 s->last_dc[1] = get_bits(&s->gb, 8);
283 s->last_dc[2] = get_bits(&s->gb, 8);
284 ff_dlog(s->avctx, "DC:%d %d %d\n", s->last_dc[0],
285 s->last_dc[1], s->last_dc[2]);
288 /* if multiple packets per frame are sent, the position at which
289 * to display the macroblocks is coded here */
291 mb_xy = s->mb_x + s->mb_y * s->mb_width;
292 if (show_bits(&s->gb, 12) == 0 || (mb_xy && mb_xy < s->mb_num)) {
293 s->mb_x = get_bits(&s->gb, 6); /* mb_x */
294 s->mb_y = get_bits(&s->gb, 6); /* mb_y */
295 mb_count = get_bits(&s->gb, 12);
299 mb_count = s->mb_width * s->mb_height;
301 skip_bits(&s->gb, 3); /* ignored */
303 s->unrestricted_mv = 1;
308 static int rv20_decode_picture_header(RVDecContext *rv)
310 MpegEncContext *s = &rv->m;
311 int seq, mb_pos, i, ret;
314 i = get_bits(&s->gb, 2);
317 s->pict_type = AV_PICTURE_TYPE_I;
320 s->pict_type = AV_PICTURE_TYPE_I;
323 s->pict_type = AV_PICTURE_TYPE_P;
326 s->pict_type = AV_PICTURE_TYPE_B;
329 av_log(s->avctx, AV_LOG_ERROR, "unknown frame type\n");
330 return AVERROR_INVALIDDATA;
333 if (s->low_delay && s->pict_type == AV_PICTURE_TYPE_B) {
334 av_log(s->avctx, AV_LOG_ERROR, "low delay B\n");
337 if (!s->last_picture_ptr && s->pict_type == AV_PICTURE_TYPE_B) {
338 av_log(s->avctx, AV_LOG_ERROR, "early B-frame\n");
339 return AVERROR_INVALIDDATA;
342 if (get_bits1(&s->gb)) {
343 av_log(s->avctx, AV_LOG_ERROR, "reserved bit set\n");
344 return AVERROR_INVALIDDATA;
347 s->qscale = get_bits(&s->gb, 5);
348 if (s->qscale == 0) {
349 av_log(s->avctx, AV_LOG_ERROR, "Invalid qscale value: 0\n");
350 return AVERROR_INVALIDDATA;
353 if (RV_GET_MINOR_VER(rv->sub_id) >= 2)
354 s->loop_filter = get_bits1(&s->gb) && !s->avctx->lowres;
356 if (RV_GET_MINOR_VER(rv->sub_id) <= 1)
357 seq = get_bits(&s->gb, 8) << 7;
359 seq = get_bits(&s->gb, 13) << 2;
361 rpr_max = s->avctx->extradata[1] & 7;
364 int rpr_bits = av_log2(rpr_max) + 1;
366 f = get_bits(&s->gb, rpr_bits);
369 if (s->avctx->extradata_size < 8 + 2 * f) {
370 av_log(s->avctx, AV_LOG_ERROR, "Extradata too small.\n");
371 return AVERROR_INVALIDDATA;
374 new_w = 4 * ((uint8_t *) s->avctx->extradata)[6 + 2 * f];
375 new_h = 4 * ((uint8_t *) s->avctx->extradata)[7 + 2 * f];
377 new_w = rv->orig_width;
378 new_h = rv->orig_height;
380 if (new_w != s->width || new_h != s->height) {
381 AVRational old_aspect = s->avctx->sample_aspect_ratio;
382 av_log(s->avctx, AV_LOG_DEBUG,
383 "attempting to change resolution to %dx%d\n", new_w, new_h);
384 if (av_image_check_size(new_w, new_h, 0, s->avctx) < 0)
385 return AVERROR_INVALIDDATA;
386 ff_mpv_common_end(s);
388 // attempt to keep aspect during typical resolution switches
390 old_aspect = (AVRational){1, 1};
391 if (2 * (int64_t)new_w * s->height == (int64_t)new_h * s->width)
392 s->avctx->sample_aspect_ratio = av_mul_q(old_aspect, (AVRational){2, 1});
393 if ((int64_t)new_w * s->height == 2 * (int64_t)new_h * s->width)
394 s->avctx->sample_aspect_ratio = av_mul_q(old_aspect, (AVRational){1, 2});
396 ret = ff_set_dimensions(s->avctx, new_w, new_h);
402 if ((ret = ff_mpv_common_init(s)) < 0)
406 if (s->avctx->debug & FF_DEBUG_PICT_INFO) {
407 av_log(s->avctx, AV_LOG_DEBUG, "F %d/%d/%d\n", f, rpr_bits, rpr_max);
410 if (av_image_check_size(s->width, s->height, 0, s->avctx) < 0)
411 return AVERROR_INVALIDDATA;
413 mb_pos = ff_h263_decode_mba(s);
415 seq |= s->time & ~0x7FFF;
416 if (seq - s->time > 0x4000)
418 if (seq - s->time < -0x4000)
421 if (seq != s->time) {
422 if (s->pict_type != AV_PICTURE_TYPE_B) {
424 s->pp_time = s->time - s->last_non_b_time;
425 s->last_non_b_time = s->time;
428 s->pb_time = s->pp_time - (s->last_non_b_time - s->time);
431 if (s->pict_type == AV_PICTURE_TYPE_B) {
432 if (s->pp_time <=s->pb_time || s->pp_time <= s->pp_time - s->pb_time || s->pp_time<=0) {
433 av_log(s->avctx, AV_LOG_DEBUG,
434 "messed up order, possible from seeking? skipping current B-frame\n");
435 #define ERROR_SKIP_FRAME -123
436 return ERROR_SKIP_FRAME;
438 ff_mpeg4_init_direct_mv(s);
441 s->no_rounding = get_bits1(&s->gb);
443 if (RV_GET_MINOR_VER(rv->sub_id) <= 1 && s->pict_type == AV_PICTURE_TYPE_B)
444 // binary decoder reads 3+2 bits here but they don't seem to be used
445 skip_bits(&s->gb, 5);
448 s->unrestricted_mv = 1;
449 s->h263_aic = s->pict_type == AV_PICTURE_TYPE_I;
450 s->modified_quant = 1;
451 if (!s->avctx->lowres)
454 if (s->avctx->debug & FF_DEBUG_PICT_INFO) {
455 av_log(s->avctx, AV_LOG_INFO,
456 "num:%5d x:%2d y:%2d type:%d qscale:%2d rnd:%d\n",
457 seq, s->mb_x, s->mb_y, s->pict_type, s->qscale,
461 av_assert0(s->pict_type != AV_PICTURE_TYPE_B || !s->low_delay);
463 return s->mb_width * s->mb_height - mb_pos;
466 static av_cold int rv10_decode_init(AVCodecContext *avctx)
468 RVDecContext *rv = avctx->priv_data;
469 MpegEncContext *s = &rv->m;
471 int major_ver, minor_ver, micro_ver, ret;
473 if (avctx->extradata_size < 8) {
474 av_log(avctx, AV_LOG_ERROR, "Extradata is too small.\n");
475 return AVERROR_INVALIDDATA;
477 if ((ret = av_image_check_size(avctx->coded_width,
478 avctx->coded_height, 0, avctx)) < 0)
481 ff_mpv_decode_defaults(s);
482 ff_mpv_decode_init(s, avctx);
484 s->out_format = FMT_H263;
487 s->width = avctx->coded_width;
489 s->height = avctx->coded_height;
491 s->h263_long_vectors = ((uint8_t *) avctx->extradata)[3] & 1;
492 rv->sub_id = AV_RB32((uint8_t *) avctx->extradata + 4);
494 major_ver = RV_GET_MAJOR_VER(rv->sub_id);
495 minor_ver = RV_GET_MINOR_VER(rv->sub_id);
496 micro_ver = RV_GET_MICRO_VER(rv->sub_id);
501 s->rv10_version = micro_ver ? 3 : 1;
502 s->obmc = micro_ver == 2;
505 if (minor_ver >= 2) {
507 s->avctx->has_b_frames = 1;
511 av_log(s->avctx, AV_LOG_ERROR, "unknown header %X\n", rv->sub_id);
512 avpriv_request_sample(avctx, "RV1/2 version");
513 return AVERROR_PATCHWELCOME;
516 if (avctx->debug & FF_DEBUG_PICT_INFO) {
517 av_log(avctx, AV_LOG_DEBUG, "ver:%X ver0:%"PRIX32"\n", rv->sub_id,
518 ((uint32_t *) avctx->extradata)[0]);
521 avctx->pix_fmt = AV_PIX_FMT_YUV420P;
524 if ((ret = ff_mpv_common_init(s)) < 0)
527 ff_h263dsp_init(&s->h263dsp);
528 ff_h263_decode_init_vlc();
532 INIT_VLC_STATIC(&rv_dc_lum, DC_VLC_BITS, 256,
534 rv_lum_code, 2, 2, 16384);
535 INIT_VLC_STATIC(&rv_dc_chrom, DC_VLC_BITS, 256,
537 rv_chrom_code, 2, 2, 16388);
544 static av_cold int rv10_decode_end(AVCodecContext *avctx)
546 MpegEncContext *s = avctx->priv_data;
548 ff_mpv_common_end(s);
552 static int rv10_decode_packet(AVCodecContext *avctx, const uint8_t *buf,
553 int buf_size, int buf_size2, int whole_size)
555 RVDecContext *rv = avctx->priv_data;
556 MpegEncContext *s = &rv->m;
557 int mb_count, mb_pos, left, start_mb_x, active_bits_size, ret;
559 active_bits_size = buf_size * 8;
560 init_get_bits(&s->gb, buf, FFMAX(buf_size, buf_size2) * 8);
561 if (s->codec_id == AV_CODEC_ID_RV10)
562 mb_count = rv10_decode_picture_header(s);
564 mb_count = rv20_decode_picture_header(rv);
566 if (mb_count != ERROR_SKIP_FRAME)
567 av_log(s->avctx, AV_LOG_ERROR, "HEADER ERROR\n");
568 return AVERROR_INVALIDDATA;
571 if (s->mb_x >= s->mb_width ||
572 s->mb_y >= s->mb_height) {
573 av_log(s->avctx, AV_LOG_ERROR, "POS ERROR %d %d\n", s->mb_x, s->mb_y);
574 return AVERROR_INVALIDDATA;
576 mb_pos = s->mb_y * s->mb_width + s->mb_x;
577 left = s->mb_width * s->mb_height - mb_pos;
578 if (mb_count > left) {
579 av_log(s->avctx, AV_LOG_ERROR, "COUNT ERROR\n");
580 return AVERROR_INVALIDDATA;
583 if (whole_size < s->mb_width * s->mb_height / 8)
584 return AVERROR_INVALIDDATA;
586 if ((s->mb_x == 0 && s->mb_y == 0) || !s->current_picture_ptr) {
587 // FIXME write parser so we always have complete frames?
588 if (s->current_picture_ptr) {
589 ff_er_frame_end(&s->er);
591 s->mb_x = s->mb_y = s->resync_mb_x = s->resync_mb_y = 0;
593 if ((ret = ff_mpv_frame_start(s, avctx)) < 0)
595 ff_mpeg_er_frame_start(s);
597 if (s->current_picture_ptr->f->pict_type != s->pict_type) {
598 av_log(s->avctx, AV_LOG_ERROR, "Slice type mismatch\n");
599 return AVERROR_INVALIDDATA;
604 ff_dlog(avctx, "qscale=%d\n", s->qscale);
606 /* default quantization values */
607 if (s->codec_id == AV_CODEC_ID_RV10) {
609 s->first_slice_line = 1;
611 s->first_slice_line = 1;
612 s->resync_mb_x = s->mb_x;
614 start_mb_x = s->mb_x;
615 s->resync_mb_y = s->mb_y;
617 s->y_dc_scale_table =
618 s->c_dc_scale_table = ff_aic_dc_scale_table;
620 s->y_dc_scale_table =
621 s->c_dc_scale_table = ff_mpeg1_dc_scale_table;
624 if (s->modified_quant)
625 s->chroma_qscale_table = ff_h263_chroma_qscale_table;
627 ff_set_qscale(s, s->qscale);
629 s->rv10_first_dc_coded[0] = 0;
630 s->rv10_first_dc_coded[1] = 0;
631 s->rv10_first_dc_coded[2] = 0;
635 s->block_wrap[3] = s->b8_stride;
637 s->block_wrap[5] = s->mb_stride;
638 ff_init_block_index(s);
640 /* decode each macroblock */
641 for (s->mb_num_left = mb_count; s->mb_num_left > 0; s->mb_num_left--) {
643 ff_update_block_index(s);
644 ff_tlog(avctx, "**mb x=%d y=%d\n", s->mb_x, s->mb_y);
646 s->mv_dir = MV_DIR_FORWARD;
647 s->mv_type = MV_TYPE_16X16;
648 ret = ff_h263_decode_mb(s, s->block);
650 // Repeat the slice end check from ff_h263_decode_mb with our active
652 if (ret != SLICE_ERROR && active_bits_size >= get_bits_count(&s->gb)) {
653 int v = show_bits(&s->gb, 16);
655 if (get_bits_count(&s->gb) + 16 > active_bits_size)
656 v >>= get_bits_count(&s->gb) + 16 - active_bits_size;
661 if (ret != SLICE_ERROR && active_bits_size < get_bits_count(&s->gb) &&
662 8 * buf_size2 >= get_bits_count(&s->gb)) {
663 active_bits_size = buf_size2 * 8;
664 av_log(avctx, AV_LOG_DEBUG, "update size from %d to %d\n",
665 8 * buf_size, active_bits_size);
669 if (ret == SLICE_ERROR || active_bits_size < get_bits_count(&s->gb)) {
670 av_log(s->avctx, AV_LOG_ERROR, "ERROR at MB %d %d\n", s->mb_x,
672 return AVERROR_INVALIDDATA;
674 if (s->pict_type != AV_PICTURE_TYPE_B)
675 ff_h263_update_motion_val(s);
676 ff_mpv_reconstruct_mb(s, s->block);
678 ff_h263_loop_filter(s);
680 if (++s->mb_x == s->mb_width) {
683 ff_init_block_index(s);
685 if (s->mb_x == s->resync_mb_x)
686 s->first_slice_line = 0;
687 if (ret == SLICE_END)
691 ff_er_add_slice(&s->er, start_mb_x, s->resync_mb_y, s->mb_x - 1, s->mb_y,
694 return active_bits_size;
697 static int get_slice_offset(AVCodecContext *avctx, const uint8_t *buf, int n)
699 if (avctx->slice_count)
700 return avctx->slice_offset[n];
702 return AV_RL32(buf + n * 8);
705 static int rv10_decode_frame(AVCodecContext *avctx, void *data, int *got_frame,
708 const uint8_t *buf = avpkt->data;
709 int buf_size = avpkt->size;
710 MpegEncContext *s = avctx->priv_data;
711 AVFrame *pict = data;
714 const uint8_t *slices_hdr = NULL;
716 ff_dlog(avctx, "*****frame %d size=%d\n", avctx->frame_number, buf_size);
718 /* no supplementary picture */
723 if (!avctx->slice_count) {
724 slice_count = (*buf++) + 1;
727 if (!slice_count || buf_size <= 8 * slice_count) {
728 av_log(avctx, AV_LOG_ERROR, "Invalid slice count: %d.\n",
730 return AVERROR_INVALIDDATA;
733 slices_hdr = buf + 4;
734 buf += 8 * slice_count;
735 buf_size -= 8 * slice_count;
737 slice_count = avctx->slice_count;
739 for (i = 0; i < slice_count; i++) {
740 unsigned offset = get_slice_offset(avctx, slices_hdr, i);
743 if (offset >= buf_size)
744 return AVERROR_INVALIDDATA;
746 if (i + 1 == slice_count)
747 size = buf_size - offset;
749 size = get_slice_offset(avctx, slices_hdr, i + 1) - offset;
751 if (i + 2 >= slice_count)
752 size2 = buf_size - offset;
754 size2 = get_slice_offset(avctx, slices_hdr, i + 2) - offset;
756 if (size <= 0 || size2 <= 0 ||
757 offset + FFMAX(size, size2) > buf_size)
758 return AVERROR_INVALIDDATA;
760 if ((ret = rv10_decode_packet(avctx, buf + offset, size, size2, buf_size)) < 0)
767 if (s->current_picture_ptr && s->mb_y >= s->mb_height) {
768 ff_er_frame_end(&s->er);
771 if (s->pict_type == AV_PICTURE_TYPE_B || s->low_delay) {
772 if ((ret = av_frame_ref(pict, s->current_picture_ptr->f)) < 0)
774 ff_print_debug_info(s, s->current_picture_ptr, pict);
775 ff_mpv_export_qp_table(s, pict, s->current_picture_ptr, FF_QSCALE_TYPE_MPEG1);
776 } else if (s->last_picture_ptr) {
777 if ((ret = av_frame_ref(pict, s->last_picture_ptr->f)) < 0)
779 ff_print_debug_info(s, s->last_picture_ptr, pict);
780 ff_mpv_export_qp_table(s, pict,s->last_picture_ptr, FF_QSCALE_TYPE_MPEG1);
783 if (s->last_picture_ptr || s->low_delay) {
787 // so we can detect if frame_end was not called (find some nicer solution...)
788 s->current_picture_ptr = NULL;
794 AVCodec ff_rv10_decoder = {
796 .long_name = NULL_IF_CONFIG_SMALL("RealVideo 1.0"),
797 .type = AVMEDIA_TYPE_VIDEO,
798 .id = AV_CODEC_ID_RV10,
799 .priv_data_size = sizeof(RVDecContext),
800 .init = rv10_decode_init,
801 .close = rv10_decode_end,
802 .decode = rv10_decode_frame,
803 .capabilities = AV_CODEC_CAP_DR1,
805 .pix_fmts = (const enum AVPixelFormat[]) {
811 AVCodec ff_rv20_decoder = {
813 .long_name = NULL_IF_CONFIG_SMALL("RealVideo 2.0"),
814 .type = AVMEDIA_TYPE_VIDEO,
815 .id = AV_CODEC_ID_RV20,
816 .priv_data_size = sizeof(RVDecContext),
817 .init = rv10_decode_init,
818 .close = rv10_decode_end,
819 .decode = rv10_decode_frame,
820 .capabilities = AV_CODEC_CAP_DR1 | AV_CODEC_CAP_DELAY,
821 .flush = ff_mpeg_flush,
823 .pix_fmts = (const enum AVPixelFormat[]) {