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"
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 {
49 int orig_width, orig_height;
52 static const uint16_t rv_lum_code[256] = {
53 0x3e7f, 0x0f00, 0x0f01, 0x0f02, 0x0f03, 0x0f04, 0x0f05, 0x0f06,
54 0x0f07, 0x0f08, 0x0f09, 0x0f0a, 0x0f0b, 0x0f0c, 0x0f0d, 0x0f0e,
55 0x0f0f, 0x0f10, 0x0f11, 0x0f12, 0x0f13, 0x0f14, 0x0f15, 0x0f16,
56 0x0f17, 0x0f18, 0x0f19, 0x0f1a, 0x0f1b, 0x0f1c, 0x0f1d, 0x0f1e,
57 0x0f1f, 0x0f20, 0x0f21, 0x0f22, 0x0f23, 0x0f24, 0x0f25, 0x0f26,
58 0x0f27, 0x0f28, 0x0f29, 0x0f2a, 0x0f2b, 0x0f2c, 0x0f2d, 0x0f2e,
59 0x0f2f, 0x0f30, 0x0f31, 0x0f32, 0x0f33, 0x0f34, 0x0f35, 0x0f36,
60 0x0f37, 0x0f38, 0x0f39, 0x0f3a, 0x0f3b, 0x0f3c, 0x0f3d, 0x0f3e,
61 0x0f3f, 0x0380, 0x0381, 0x0382, 0x0383, 0x0384, 0x0385, 0x0386,
62 0x0387, 0x0388, 0x0389, 0x038a, 0x038b, 0x038c, 0x038d, 0x038e,
63 0x038f, 0x0390, 0x0391, 0x0392, 0x0393, 0x0394, 0x0395, 0x0396,
64 0x0397, 0x0398, 0x0399, 0x039a, 0x039b, 0x039c, 0x039d, 0x039e,
65 0x039f, 0x00c0, 0x00c1, 0x00c2, 0x00c3, 0x00c4, 0x00c5, 0x00c6,
66 0x00c7, 0x00c8, 0x00c9, 0x00ca, 0x00cb, 0x00cc, 0x00cd, 0x00ce,
67 0x00cf, 0x0050, 0x0051, 0x0052, 0x0053, 0x0054, 0x0055, 0x0056,
68 0x0057, 0x0020, 0x0021, 0x0022, 0x0023, 0x000c, 0x000d, 0x0004,
69 0x0000, 0x0005, 0x000e, 0x000f, 0x0024, 0x0025, 0x0026, 0x0027,
70 0x0058, 0x0059, 0x005a, 0x005b, 0x005c, 0x005d, 0x005e, 0x005f,
71 0x00d0, 0x00d1, 0x00d2, 0x00d3, 0x00d4, 0x00d5, 0x00d6, 0x00d7,
72 0x00d8, 0x00d9, 0x00da, 0x00db, 0x00dc, 0x00dd, 0x00de, 0x00df,
73 0x03a0, 0x03a1, 0x03a2, 0x03a3, 0x03a4, 0x03a5, 0x03a6, 0x03a7,
74 0x03a8, 0x03a9, 0x03aa, 0x03ab, 0x03ac, 0x03ad, 0x03ae, 0x03af,
75 0x03b0, 0x03b1, 0x03b2, 0x03b3, 0x03b4, 0x03b5, 0x03b6, 0x03b7,
76 0x03b8, 0x03b9, 0x03ba, 0x03bb, 0x03bc, 0x03bd, 0x03be, 0x03bf,
77 0x0f40, 0x0f41, 0x0f42, 0x0f43, 0x0f44, 0x0f45, 0x0f46, 0x0f47,
78 0x0f48, 0x0f49, 0x0f4a, 0x0f4b, 0x0f4c, 0x0f4d, 0x0f4e, 0x0f4f,
79 0x0f50, 0x0f51, 0x0f52, 0x0f53, 0x0f54, 0x0f55, 0x0f56, 0x0f57,
80 0x0f58, 0x0f59, 0x0f5a, 0x0f5b, 0x0f5c, 0x0f5d, 0x0f5e, 0x0f5f,
81 0x0f60, 0x0f61, 0x0f62, 0x0f63, 0x0f64, 0x0f65, 0x0f66, 0x0f67,
82 0x0f68, 0x0f69, 0x0f6a, 0x0f6b, 0x0f6c, 0x0f6d, 0x0f6e, 0x0f6f,
83 0x0f70, 0x0f71, 0x0f72, 0x0f73, 0x0f74, 0x0f75, 0x0f76, 0x0f77,
84 0x0f78, 0x0f79, 0x0f7a, 0x0f7b, 0x0f7c, 0x0f7d, 0x0f7e, 0x0f7f,
87 static const uint8_t rv_lum_bits[256] = {
88 14, 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, 12, 12, 12, 12, 12, 12, 12,
96 12, 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, 10, 10, 10, 10, 10, 10, 10,
100 10, 8, 8, 8, 8, 8, 8, 8,
101 8, 8, 8, 8, 8, 8, 8, 8,
102 8, 7, 7, 7, 7, 7, 7, 7,
103 7, 6, 6, 6, 6, 5, 5, 4,
104 2, 4, 5, 5, 6, 6, 6, 6,
105 7, 7, 7, 7, 7, 7, 7, 7,
106 8, 8, 8, 8, 8, 8, 8, 8,
107 8, 8, 8, 8, 8, 8, 8, 8,
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 10, 10, 10, 10, 10, 10, 10, 10,
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,
119 12, 12, 12, 12, 12, 12, 12, 12,
122 static const uint16_t rv_chrom_code[256] = {
123 0xfe7f, 0x3f00, 0x3f01, 0x3f02, 0x3f03, 0x3f04, 0x3f05, 0x3f06,
124 0x3f07, 0x3f08, 0x3f09, 0x3f0a, 0x3f0b, 0x3f0c, 0x3f0d, 0x3f0e,
125 0x3f0f, 0x3f10, 0x3f11, 0x3f12, 0x3f13, 0x3f14, 0x3f15, 0x3f16,
126 0x3f17, 0x3f18, 0x3f19, 0x3f1a, 0x3f1b, 0x3f1c, 0x3f1d, 0x3f1e,
127 0x3f1f, 0x3f20, 0x3f21, 0x3f22, 0x3f23, 0x3f24, 0x3f25, 0x3f26,
128 0x3f27, 0x3f28, 0x3f29, 0x3f2a, 0x3f2b, 0x3f2c, 0x3f2d, 0x3f2e,
129 0x3f2f, 0x3f30, 0x3f31, 0x3f32, 0x3f33, 0x3f34, 0x3f35, 0x3f36,
130 0x3f37, 0x3f38, 0x3f39, 0x3f3a, 0x3f3b, 0x3f3c, 0x3f3d, 0x3f3e,
131 0x3f3f, 0x0f80, 0x0f81, 0x0f82, 0x0f83, 0x0f84, 0x0f85, 0x0f86,
132 0x0f87, 0x0f88, 0x0f89, 0x0f8a, 0x0f8b, 0x0f8c, 0x0f8d, 0x0f8e,
133 0x0f8f, 0x0f90, 0x0f91, 0x0f92, 0x0f93, 0x0f94, 0x0f95, 0x0f96,
134 0x0f97, 0x0f98, 0x0f99, 0x0f9a, 0x0f9b, 0x0f9c, 0x0f9d, 0x0f9e,
135 0x0f9f, 0x03c0, 0x03c1, 0x03c2, 0x03c3, 0x03c4, 0x03c5, 0x03c6,
136 0x03c7, 0x03c8, 0x03c9, 0x03ca, 0x03cb, 0x03cc, 0x03cd, 0x03ce,
137 0x03cf, 0x00e0, 0x00e1, 0x00e2, 0x00e3, 0x00e4, 0x00e5, 0x00e6,
138 0x00e7, 0x0030, 0x0031, 0x0032, 0x0033, 0x0008, 0x0009, 0x0002,
139 0x0000, 0x0003, 0x000a, 0x000b, 0x0034, 0x0035, 0x0036, 0x0037,
140 0x00e8, 0x00e9, 0x00ea, 0x00eb, 0x00ec, 0x00ed, 0x00ee, 0x00ef,
141 0x03d0, 0x03d1, 0x03d2, 0x03d3, 0x03d4, 0x03d5, 0x03d6, 0x03d7,
142 0x03d8, 0x03d9, 0x03da, 0x03db, 0x03dc, 0x03dd, 0x03de, 0x03df,
143 0x0fa0, 0x0fa1, 0x0fa2, 0x0fa3, 0x0fa4, 0x0fa5, 0x0fa6, 0x0fa7,
144 0x0fa8, 0x0fa9, 0x0faa, 0x0fab, 0x0fac, 0x0fad, 0x0fae, 0x0faf,
145 0x0fb0, 0x0fb1, 0x0fb2, 0x0fb3, 0x0fb4, 0x0fb5, 0x0fb6, 0x0fb7,
146 0x0fb8, 0x0fb9, 0x0fba, 0x0fbb, 0x0fbc, 0x0fbd, 0x0fbe, 0x0fbf,
147 0x3f40, 0x3f41, 0x3f42, 0x3f43, 0x3f44, 0x3f45, 0x3f46, 0x3f47,
148 0x3f48, 0x3f49, 0x3f4a, 0x3f4b, 0x3f4c, 0x3f4d, 0x3f4e, 0x3f4f,
149 0x3f50, 0x3f51, 0x3f52, 0x3f53, 0x3f54, 0x3f55, 0x3f56, 0x3f57,
150 0x3f58, 0x3f59, 0x3f5a, 0x3f5b, 0x3f5c, 0x3f5d, 0x3f5e, 0x3f5f,
151 0x3f60, 0x3f61, 0x3f62, 0x3f63, 0x3f64, 0x3f65, 0x3f66, 0x3f67,
152 0x3f68, 0x3f69, 0x3f6a, 0x3f6b, 0x3f6c, 0x3f6d, 0x3f6e, 0x3f6f,
153 0x3f70, 0x3f71, 0x3f72, 0x3f73, 0x3f74, 0x3f75, 0x3f76, 0x3f77,
154 0x3f78, 0x3f79, 0x3f7a, 0x3f7b, 0x3f7c, 0x3f7d, 0x3f7e, 0x3f7f,
157 static const uint8_t rv_chrom_bits[256] = {
158 16, 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, 14, 14, 14, 14, 14, 14, 14,
166 14, 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, 12, 12, 12, 12, 12, 12, 12,
170 12, 10, 10, 10, 10, 10, 10, 10,
171 10, 10, 10, 10, 10, 10, 10, 10,
172 10, 8, 8, 8, 8, 8, 8, 8,
173 8, 6, 6, 6, 6, 4, 4, 3,
174 2, 3, 4, 4, 6, 6, 6, 6,
175 8, 8, 8, 8, 8, 8, 8, 8,
176 10, 10, 10, 10, 10, 10, 10, 10,
177 10, 10, 10, 10, 10, 10, 10, 10,
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 12, 12, 12, 12, 12, 12, 12, 12,
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,
189 14, 14, 14, 14, 14, 14, 14, 14,
192 static VLC rv_dc_lum, rv_dc_chrom;
194 int ff_rv_decode_dc(MpegEncContext *s, int n)
199 code = get_vlc2(&s->gb, rv_dc_lum.table, DC_VLC_BITS, 2);
201 /* XXX: I don't understand why they use LONGER codes than
202 * necessary. The following code would be completely useless
203 * if they had thought about it !!! */
204 code = get_bits(&s->gb, 7);
206 code = (int8_t) (get_bits(&s->gb, 7) + 1);
207 } else if (code == 0x7d) {
208 code = -128 + get_bits(&s->gb, 7);
209 } else if (code == 0x7e) {
210 if (get_bits1(&s->gb) == 0)
211 code = (int8_t) (get_bits(&s->gb, 8) + 1);
213 code = (int8_t) (get_bits(&s->gb, 8));
214 } else if (code == 0x7f) {
215 skip_bits(&s->gb, 11);
222 code = get_vlc2(&s->gb, rv_dc_chrom.table, DC_VLC_BITS, 2);
225 code = get_bits(&s->gb, 9);
227 code = (int8_t) (get_bits(&s->gb, 7) + 1);
228 } else if (code == 0x1fd) {
229 code = -128 + get_bits(&s->gb, 7);
230 } else if (code == 0x1fe) {
231 skip_bits(&s->gb, 9);
234 av_log(s->avctx, AV_LOG_ERROR, "chroma dc error\n");
244 /* read RV 1.0 compatible frame header */
245 static int rv10_decode_picture_header(MpegEncContext *s)
247 int mb_count, pb_frame, marker, mb_xy;
249 marker = get_bits1(&s->gb);
251 if (get_bits1(&s->gb))
252 s->pict_type = AV_PICTURE_TYPE_P;
254 s->pict_type = AV_PICTURE_TYPE_I;
257 av_log(s->avctx, AV_LOG_ERROR, "marker missing\n");
259 pb_frame = get_bits1(&s->gb);
261 av_dlog(s->avctx, "pict_type=%d pb_frame=%d\n", s->pict_type, pb_frame);
264 avpriv_request_sample(s->avctx, "pb frame");
265 return AVERROR_PATCHWELCOME;
268 s->qscale = get_bits(&s->gb, 5);
269 if (s->qscale == 0) {
270 av_log(s->avctx, AV_LOG_ERROR, "Invalid qscale value: 0\n");
271 return AVERROR_INVALIDDATA;
274 if (s->pict_type == AV_PICTURE_TYPE_I) {
275 if (s->rv10_version == 3) {
276 /* specific MPEG like DC coding not used */
277 s->last_dc[0] = get_bits(&s->gb, 8);
278 s->last_dc[1] = get_bits(&s->gb, 8);
279 s->last_dc[2] = get_bits(&s->gb, 8);
280 av_dlog(s->avctx, "DC:%d %d %d\n", s->last_dc[0],
281 s->last_dc[1], s->last_dc[2]);
284 /* if multiple packets per frame are sent, the position at which
285 * to display the macroblocks is coded here */
287 mb_xy = s->mb_x + s->mb_y * s->mb_width;
288 if (show_bits(&s->gb, 12) == 0 || (mb_xy && mb_xy < s->mb_num)) {
289 s->mb_x = get_bits(&s->gb, 6); /* mb_x */
290 s->mb_y = get_bits(&s->gb, 6); /* mb_y */
291 mb_count = get_bits(&s->gb, 12);
295 mb_count = s->mb_width * s->mb_height;
297 skip_bits(&s->gb, 3); /* ignored */
299 s->unrestricted_mv = 1;
304 static int rv20_decode_picture_header(RVDecContext *rv)
306 MpegEncContext *s = &rv->m;
307 int seq, mb_pos, i, ret;
310 i = get_bits(&s->gb, 2);
313 s->pict_type = AV_PICTURE_TYPE_I;
316 s->pict_type = AV_PICTURE_TYPE_I;
319 s->pict_type = AV_PICTURE_TYPE_P;
322 s->pict_type = AV_PICTURE_TYPE_B;
325 av_log(s->avctx, AV_LOG_ERROR, "unknown frame type\n");
326 return AVERROR_INVALIDDATA;
329 if (s->low_delay && s->pict_type == AV_PICTURE_TYPE_B) {
330 av_log(s->avctx, AV_LOG_ERROR, "low delay B\n");
333 if (!s->last_picture_ptr && s->pict_type == AV_PICTURE_TYPE_B) {
334 av_log(s->avctx, AV_LOG_ERROR, "early B-frame\n");
335 return AVERROR_INVALIDDATA;
338 if (get_bits1(&s->gb)) {
339 av_log(s->avctx, AV_LOG_ERROR, "reserved bit set\n");
340 return AVERROR_INVALIDDATA;
343 s->qscale = get_bits(&s->gb, 5);
344 if (s->qscale == 0) {
345 av_log(s->avctx, AV_LOG_ERROR, "Invalid qscale value: 0\n");
346 return AVERROR_INVALIDDATA;
349 if (RV_GET_MINOR_VER(rv->sub_id) >= 2)
350 s->loop_filter = get_bits1(&s->gb) && !s->avctx->lowres;
352 if (RV_GET_MINOR_VER(rv->sub_id) <= 1)
353 seq = get_bits(&s->gb, 8) << 7;
355 seq = get_bits(&s->gb, 13) << 2;
357 rpr_max = s->avctx->extradata[1] & 7;
360 int rpr_bits = av_log2(rpr_max) + 1;
362 f = get_bits(&s->gb, rpr_bits);
365 if (s->avctx->extradata_size < 8 + 2 * f) {
366 av_log(s->avctx, AV_LOG_ERROR, "Extradata too small.\n");
367 return AVERROR_INVALIDDATA;
370 new_w = 4 * ((uint8_t *) s->avctx->extradata)[6 + 2 * f];
371 new_h = 4 * ((uint8_t *) s->avctx->extradata)[7 + 2 * f];
373 new_w = rv->orig_width;
374 new_h = rv->orig_height;
376 if (new_w != s->width || new_h != s->height) {
377 AVRational old_aspect = s->avctx->sample_aspect_ratio;
378 av_log(s->avctx, AV_LOG_DEBUG,
379 "attempting to change resolution to %dx%d\n", new_w, new_h);
380 if (av_image_check_size(new_w, new_h, 0, s->avctx) < 0)
381 return AVERROR_INVALIDDATA;
382 ff_mpv_common_end(s);
384 // attempt to keep aspect during typical resolution switches
386 old_aspect = (AVRational){1, 1};
387 if (2 * new_w * s->height == new_h * s->width)
388 s->avctx->sample_aspect_ratio = av_mul_q(old_aspect, (AVRational){2, 1});
389 if (new_w * s->height == 2 * new_h * s->width)
390 s->avctx->sample_aspect_ratio = av_mul_q(old_aspect, (AVRational){1, 2});
392 ret = ff_set_dimensions(s->avctx, new_w, new_h);
398 if ((ret = ff_mpv_common_init(s)) < 0)
402 if (s->avctx->debug & FF_DEBUG_PICT_INFO) {
403 av_log(s->avctx, AV_LOG_DEBUG, "F %d/%d/%d\n", f, rpr_bits, rpr_max);
406 if (av_image_check_size(s->width, s->height, 0, s->avctx) < 0)
407 return AVERROR_INVALIDDATA;
409 mb_pos = ff_h263_decode_mba(s);
411 seq |= s->time & ~0x7FFF;
412 if (seq - s->time > 0x4000)
414 if (seq - s->time < -0x4000)
417 if (seq != s->time) {
418 if (s->pict_type != AV_PICTURE_TYPE_B) {
420 s->pp_time = s->time - s->last_non_b_time;
421 s->last_non_b_time = s->time;
424 s->pb_time = s->pp_time - (s->last_non_b_time - s->time);
427 if (s->pict_type == AV_PICTURE_TYPE_B) {
428 if (s->pp_time <=s->pb_time || s->pp_time <= s->pp_time - s->pb_time || s->pp_time<=0) {
429 av_log(s->avctx, AV_LOG_DEBUG,
430 "messed up order, possible from seeking? skipping current b frame\n");
431 #define ERROR_SKIP_FRAME -123
432 return ERROR_SKIP_FRAME;
434 ff_mpeg4_init_direct_mv(s);
437 s->no_rounding = get_bits1(&s->gb);
439 if (RV_GET_MINOR_VER(rv->sub_id) <= 1 && s->pict_type == AV_PICTURE_TYPE_B)
440 // binary decoder reads 3+2 bits here but they don't seem to be used
441 skip_bits(&s->gb, 5);
444 s->unrestricted_mv = 1;
445 s->h263_aic = s->pict_type == AV_PICTURE_TYPE_I;
446 s->modified_quant = 1;
447 if (!s->avctx->lowres)
450 if (s->avctx->debug & FF_DEBUG_PICT_INFO) {
451 av_log(s->avctx, AV_LOG_INFO,
452 "num:%5d x:%2d y:%2d type:%d qscale:%2d rnd:%d\n",
453 seq, s->mb_x, s->mb_y, s->pict_type, s->qscale,
457 av_assert0(s->pict_type != AV_PICTURE_TYPE_B || !s->low_delay);
459 return s->mb_width * s->mb_height - mb_pos;
462 static av_cold int rv10_decode_init(AVCodecContext *avctx)
464 RVDecContext *rv = avctx->priv_data;
465 MpegEncContext *s = &rv->m;
467 int major_ver, minor_ver, micro_ver, ret;
469 if (avctx->extradata_size < 8) {
470 av_log(avctx, AV_LOG_ERROR, "Extradata is too small.\n");
471 return AVERROR_INVALIDDATA;
473 if ((ret = av_image_check_size(avctx->coded_width,
474 avctx->coded_height, 0, avctx)) < 0)
477 ff_mpv_decode_defaults(s);
478 ff_mpv_decode_init(s, avctx);
480 s->out_format = FMT_H263;
483 s->width = avctx->coded_width;
485 s->height = avctx->coded_height;
487 s->h263_long_vectors = ((uint8_t *) avctx->extradata)[3] & 1;
488 rv->sub_id = AV_RB32((uint8_t *) avctx->extradata + 4);
490 major_ver = RV_GET_MAJOR_VER(rv->sub_id);
491 minor_ver = RV_GET_MINOR_VER(rv->sub_id);
492 micro_ver = RV_GET_MICRO_VER(rv->sub_id);
497 s->rv10_version = micro_ver ? 3 : 1;
498 s->obmc = micro_ver == 2;
501 if (minor_ver >= 2) {
503 s->avctx->has_b_frames = 1;
507 av_log(s->avctx, AV_LOG_ERROR, "unknown header %X\n", rv->sub_id);
508 avpriv_request_sample(avctx, "RV1/2 version");
509 return AVERROR_PATCHWELCOME;
512 if (avctx->debug & FF_DEBUG_PICT_INFO) {
513 av_log(avctx, AV_LOG_DEBUG, "ver:%X ver0:%"PRIX32"\n", rv->sub_id,
514 ((uint32_t *) avctx->extradata)[0]);
517 avctx->pix_fmt = AV_PIX_FMT_YUV420P;
520 if ((ret = ff_mpv_common_init(s)) < 0)
523 ff_h263dsp_init(&s->h263dsp);
524 ff_h263_decode_init_vlc();
528 INIT_VLC_STATIC(&rv_dc_lum, DC_VLC_BITS, 256,
530 rv_lum_code, 2, 2, 16384);
531 INIT_VLC_STATIC(&rv_dc_chrom, DC_VLC_BITS, 256,
533 rv_chrom_code, 2, 2, 16388);
540 static av_cold int rv10_decode_end(AVCodecContext *avctx)
542 MpegEncContext *s = avctx->priv_data;
544 ff_mpv_common_end(s);
548 static int rv10_decode_packet(AVCodecContext *avctx, const uint8_t *buf,
549 int buf_size, int buf_size2)
551 RVDecContext *rv = avctx->priv_data;
552 MpegEncContext *s = &rv->m;
553 int mb_count, mb_pos, left, start_mb_x, active_bits_size, ret;
555 active_bits_size = buf_size * 8;
556 init_get_bits(&s->gb, buf, FFMAX(buf_size, buf_size2) * 8);
557 if (s->codec_id == AV_CODEC_ID_RV10)
558 mb_count = rv10_decode_picture_header(s);
560 mb_count = rv20_decode_picture_header(rv);
562 if (mb_count != ERROR_SKIP_FRAME)
563 av_log(s->avctx, AV_LOG_ERROR, "HEADER ERROR\n");
564 return AVERROR_INVALIDDATA;
567 if (s->mb_x >= s->mb_width ||
568 s->mb_y >= s->mb_height) {
569 av_log(s->avctx, AV_LOG_ERROR, "POS ERROR %d %d\n", s->mb_x, s->mb_y);
570 return AVERROR_INVALIDDATA;
572 mb_pos = s->mb_y * s->mb_width + s->mb_x;
573 left = s->mb_width * s->mb_height - mb_pos;
574 if (mb_count > left) {
575 av_log(s->avctx, AV_LOG_ERROR, "COUNT ERROR\n");
576 return AVERROR_INVALIDDATA;
579 if ((s->mb_x == 0 && s->mb_y == 0) || !s->current_picture_ptr) {
580 // FIXME write parser so we always have complete frames?
581 if (s->current_picture_ptr) {
582 ff_er_frame_end(&s->er);
584 s->mb_x = s->mb_y = s->resync_mb_x = s->resync_mb_y = 0;
586 if ((ret = ff_mpv_frame_start(s, avctx)) < 0)
588 ff_mpeg_er_frame_start(s);
590 if (s->current_picture_ptr->f->pict_type != s->pict_type) {
591 av_log(s->avctx, AV_LOG_ERROR, "Slice type mismatch\n");
592 return AVERROR_INVALIDDATA;
597 av_dlog(avctx, "qscale=%d\n", s->qscale);
599 /* default quantization values */
600 if (s->codec_id == AV_CODEC_ID_RV10) {
602 s->first_slice_line = 1;
604 s->first_slice_line = 1;
605 s->resync_mb_x = s->mb_x;
607 start_mb_x = s->mb_x;
608 s->resync_mb_y = s->mb_y;
610 s->y_dc_scale_table =
611 s->c_dc_scale_table = ff_aic_dc_scale_table;
613 s->y_dc_scale_table =
614 s->c_dc_scale_table = ff_mpeg1_dc_scale_table;
617 if (s->modified_quant)
618 s->chroma_qscale_table = ff_h263_chroma_qscale_table;
620 ff_set_qscale(s, s->qscale);
622 s->rv10_first_dc_coded[0] = 0;
623 s->rv10_first_dc_coded[1] = 0;
624 s->rv10_first_dc_coded[2] = 0;
628 s->block_wrap[3] = s->b8_stride;
630 s->block_wrap[5] = s->mb_stride;
631 ff_init_block_index(s);
633 /* decode each macroblock */
634 for (s->mb_num_left = mb_count; s->mb_num_left > 0; s->mb_num_left--) {
636 ff_update_block_index(s);
637 av_dlog(avctx, "**mb x=%d y=%d\n", s->mb_x, s->mb_y);
639 s->mv_dir = MV_DIR_FORWARD;
640 s->mv_type = MV_TYPE_16X16;
641 ret = ff_h263_decode_mb(s, s->block);
643 // Repeat the slice end check from ff_h263_decode_mb with our active
645 if (ret != SLICE_ERROR) {
646 int v = show_bits(&s->gb, 16);
648 if (get_bits_count(&s->gb) + 16 > active_bits_size)
649 v >>= get_bits_count(&s->gb) + 16 - active_bits_size;
654 if (ret != SLICE_ERROR && active_bits_size < get_bits_count(&s->gb) &&
655 8 * buf_size2 >= get_bits_count(&s->gb)) {
656 active_bits_size = buf_size2 * 8;
657 av_log(avctx, AV_LOG_DEBUG, "update size from %d to %d\n",
658 8 * buf_size, active_bits_size);
662 if (ret == SLICE_ERROR || active_bits_size < get_bits_count(&s->gb)) {
663 av_log(s->avctx, AV_LOG_ERROR, "ERROR at MB %d %d\n", s->mb_x,
665 return AVERROR_INVALIDDATA;
667 if (s->pict_type != AV_PICTURE_TYPE_B)
668 ff_h263_update_motion_val(s);
669 ff_mpv_decode_mb(s, s->block);
671 ff_h263_loop_filter(s);
673 if (++s->mb_x == s->mb_width) {
676 ff_init_block_index(s);
678 if (s->mb_x == s->resync_mb_x)
679 s->first_slice_line = 0;
680 if (ret == SLICE_END)
684 ff_er_add_slice(&s->er, start_mb_x, s->resync_mb_y, s->mb_x - 1, s->mb_y,
687 return active_bits_size;
690 static int get_slice_offset(AVCodecContext *avctx, const uint8_t *buf, int n)
692 if (avctx->slice_count)
693 return avctx->slice_offset[n];
695 return AV_RL32(buf + n * 8);
698 static int rv10_decode_frame(AVCodecContext *avctx, void *data, int *got_frame,
701 const uint8_t *buf = avpkt->data;
702 int buf_size = avpkt->size;
703 MpegEncContext *s = avctx->priv_data;
704 AVFrame *pict = data;
707 const uint8_t *slices_hdr = NULL;
709 av_dlog(avctx, "*****frame %d size=%d\n", avctx->frame_number, buf_size);
710 s->flags = avctx->flags;
711 s->flags2 = avctx->flags2;
713 /* no supplementary picture */
718 if (!avctx->slice_count) {
719 slice_count = (*buf++) + 1;
722 if (!slice_count || buf_size <= 8 * slice_count) {
723 av_log(avctx, AV_LOG_ERROR, "Invalid slice count: %d.\n",
725 return AVERROR_INVALIDDATA;
728 slices_hdr = buf + 4;
729 buf += 8 * slice_count;
730 buf_size -= 8 * slice_count;
732 slice_count = avctx->slice_count;
734 for (i = 0; i < slice_count; i++) {
735 unsigned offset = get_slice_offset(avctx, slices_hdr, i);
738 if (offset >= buf_size)
739 return AVERROR_INVALIDDATA;
741 if (i + 1 == slice_count)
742 size = buf_size - offset;
744 size = get_slice_offset(avctx, slices_hdr, i + 1) - offset;
746 if (i + 2 >= slice_count)
747 size2 = buf_size - offset;
749 size2 = get_slice_offset(avctx, slices_hdr, i + 2) - offset;
751 if (size <= 0 || size2 <= 0 ||
752 offset + FFMAX(size, size2) > buf_size)
753 return AVERROR_INVALIDDATA;
755 if ((ret = rv10_decode_packet(avctx, buf + offset, size, size2)) < 0)
762 if (s->current_picture_ptr && s->mb_y >= s->mb_height) {
763 ff_er_frame_end(&s->er);
766 if (s->pict_type == AV_PICTURE_TYPE_B || s->low_delay) {
767 if ((ret = av_frame_ref(pict, s->current_picture_ptr->f)) < 0)
769 ff_print_debug_info(s, s->current_picture_ptr, pict);
770 ff_mpv_export_qp_table(s, pict, s->current_picture_ptr, FF_QSCALE_TYPE_MPEG1);
771 } else if (s->last_picture_ptr) {
772 if ((ret = av_frame_ref(pict, s->last_picture_ptr->f)) < 0)
774 ff_print_debug_info(s, s->last_picture_ptr, pict);
775 ff_mpv_export_qp_table(s, pict,s->last_picture_ptr, FF_QSCALE_TYPE_MPEG1);
778 if (s->last_picture_ptr || s->low_delay) {
782 // so we can detect if frame_end was not called (find some nicer solution...)
783 s->current_picture_ptr = NULL;
789 AVCodec ff_rv10_decoder = {
791 .long_name = NULL_IF_CONFIG_SMALL("RealVideo 1.0"),
792 .type = AVMEDIA_TYPE_VIDEO,
793 .id = AV_CODEC_ID_RV10,
794 .priv_data_size = sizeof(RVDecContext),
795 .init = rv10_decode_init,
796 .close = rv10_decode_end,
797 .decode = rv10_decode_frame,
798 .capabilities = CODEC_CAP_DR1,
800 .pix_fmts = (const enum AVPixelFormat[]) {
806 AVCodec ff_rv20_decoder = {
808 .long_name = NULL_IF_CONFIG_SMALL("RealVideo 2.0"),
809 .type = AVMEDIA_TYPE_VIDEO,
810 .id = AV_CODEC_ID_RV20,
811 .priv_data_size = sizeof(RVDecContext),
812 .init = rv10_decode_init,
813 .close = rv10_decode_end,
814 .decode = rv10_decode_frame,
815 .capabilities = CODEC_CAP_DR1 | CODEC_CAP_DELAY,
816 .flush = ff_mpeg_flush,
818 .pix_fmts = (const enum AVPixelFormat[]) {