FFmpeg  4.3.8
rv10.c
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1 /*
2  * RV10/RV20 decoder
3  * Copyright (c) 2000,2001 Fabrice Bellard
4  * Copyright (c) 2002-2004 Michael Niedermayer
5  *
6  * This file is part of FFmpeg.
7  *
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.
12  *
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.
17  *
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
21  */
22 
23 /**
24  * @file
25  * RV10/RV20 decoder
26  */
27 
28 #include <inttypes.h>
29 
30 #include "libavutil/imgutils.h"
31 
32 #include "avcodec.h"
33 #include "error_resilience.h"
34 #include "h263.h"
35 #include "h263data.h"
36 #include "internal.h"
37 #include "mpeg_er.h"
38 #include "mpegutils.h"
39 #include "mpegvideo.h"
40 #include "mpeg4video.h"
41 #include "mpegvideodata.h"
42 #include "rv10.h"
43 
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)
47 
48 #define DC_VLC_BITS 14 // FIXME find a better solution
49 
50 typedef struct RVDecContext {
52  int sub_id;
54 } RVDecContext;
55 
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,
89 };
90 
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,
124 };
125 
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,
159 };
160 
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,
194 };
195 
197 
199 {
200  int code;
201 
202  if (n < 4) {
203  code = get_vlc2(&s->gb, rv_dc_lum.table, DC_VLC_BITS, 2);
204  if (code < 0) {
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);
209  if (code == 0x7c) {
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);
216  else
217  code = (int8_t) (get_bits(&s->gb, 8));
218  } else if (code == 0x7f) {
219  skip_bits(&s->gb, 11);
220  code = 1;
221  }
222  } else {
223  code -= 128;
224  }
225  } else {
226  code = get_vlc2(&s->gb, rv_dc_chrom.table, DC_VLC_BITS, 2);
227  /* same remark */
228  if (code < 0) {
229  code = get_bits(&s->gb, 9);
230  if (code == 0x1fc) {
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);
236  code = 1;
237  } else {
238  av_log(s->avctx, AV_LOG_ERROR, "chroma dc error\n");
239  return 0xffff;
240  }
241  } else {
242  code -= 128;
243  }
244  }
245  return -code;
246 }
247 
248 /* read RV 1.0 compatible frame header */
250 {
251  int mb_count, pb_frame, marker, mb_xy;
252 
253  marker = get_bits1(&s->gb);
254 
255  if (get_bits1(&s->gb))
257  else
259 
260  if (!marker)
261  av_log(s->avctx, AV_LOG_ERROR, "marker missing\n");
262 
263  pb_frame = get_bits1(&s->gb);
264 
265  ff_dlog(s->avctx, "pict_type=%d pb_frame=%d\n", s->pict_type, pb_frame);
266 
267  if (pb_frame) {
268  avpriv_request_sample(s->avctx, "PB-frame");
269  return AVERROR_PATCHWELCOME;
270  }
271 
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;
276  }
277 
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]);
286  }
287  }
288  /* if multiple packets per frame are sent, the position at which
289  * to display the macroblocks is coded here */
290 
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);
296  } else {
297  s->mb_x = 0;
298  s->mb_y = 0;
299  mb_count = s->mb_width * s->mb_height;
300  }
301  skip_bits(&s->gb, 3); /* ignored */
302  s->f_code = 1;
303  s->unrestricted_mv = 1;
304 
305  return mb_count;
306 }
307 
308 static int rv20_decode_picture_header(RVDecContext *rv, int whole_size)
309 {
310  MpegEncContext *s = &rv->m;
311  int seq, mb_pos, i, ret;
312  int rpr_max;
313 
314  i = get_bits(&s->gb, 2);
315  switch (i) {
316  case 0:
318  break;
319  case 1:
321  break; // hmm ...
322  case 2:
324  break;
325  case 3:
327  break;
328  default:
329  av_log(s->avctx, AV_LOG_ERROR, "unknown frame type\n");
330  return AVERROR_INVALIDDATA;
331  }
332 
333  if (s->low_delay && s->pict_type == AV_PICTURE_TYPE_B) {
334  av_log(s->avctx, AV_LOG_ERROR, "low delay B\n");
335  return -1;
336  }
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;
340  }
341 
342  if (get_bits1(&s->gb)) {
343  av_log(s->avctx, AV_LOG_ERROR, "reserved bit set\n");
344  return AVERROR_INVALIDDATA;
345  }
346 
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;
351  }
352 
353  if (RV_GET_MINOR_VER(rv->sub_id) >= 2)
354  s->loop_filter = get_bits1(&s->gb) && !s->avctx->lowres;
355 
356  if (RV_GET_MINOR_VER(rv->sub_id) <= 1)
357  seq = get_bits(&s->gb, 8) << 7;
358  else
359  seq = get_bits(&s->gb, 13) << 2;
360 
361  rpr_max = s->avctx->extradata[1] & 7;
362  if (rpr_max) {
363  int f, new_w, new_h;
364  int rpr_bits = av_log2(rpr_max) + 1;
365 
366  f = get_bits(&s->gb, rpr_bits);
367 
368  if (f) {
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;
372  }
373 
374  new_w = 4 * ((uint8_t *) s->avctx->extradata)[6 + 2 * f];
375  new_h = 4 * ((uint8_t *) s->avctx->extradata)[7 + 2 * f];
376  } else {
377  new_w = rv->orig_width;
378  new_h = rv->orig_height;
379  }
380  if (new_w != s->width || new_h != s->height) {
381  AVRational old_aspect = s->avctx->sample_aspect_ratio;
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 
387  if (whole_size < (new_w + 15)/16 * ((new_h + 15)/16) / 8)
388  return AVERROR_INVALIDDATA;
389 
391 
392  // attempt to keep aspect during typical resolution switches
393  if (!old_aspect.num)
394  old_aspect = (AVRational){1, 1};
395  if (2 * (int64_t)new_w * s->height == (int64_t)new_h * s->width)
396  s->avctx->sample_aspect_ratio = av_mul_q(old_aspect, (AVRational){2, 1});
397  if ((int64_t)new_w * s->height == 2 * (int64_t)new_h * s->width)
398  s->avctx->sample_aspect_ratio = av_mul_q(old_aspect, (AVRational){1, 2});
399 
400  ret = ff_set_dimensions(s->avctx, new_w, new_h);
401  if (ret < 0)
402  return ret;
403 
404  s->width = new_w;
405  s->height = new_h;
406  if ((ret = ff_mpv_common_init(s)) < 0)
407  return ret;
408  }
409 
410  if (s->avctx->debug & FF_DEBUG_PICT_INFO) {
411  av_log(s->avctx, AV_LOG_DEBUG, "F %d/%d/%d\n", f, rpr_bits, rpr_max);
412  }
413  }
414  if (av_image_check_size(s->width, s->height, 0, s->avctx) < 0)
415  return AVERROR_INVALIDDATA;
416 
417  mb_pos = ff_h263_decode_mba(s);
418 
419  seq |= s->time & ~0x7FFF;
420  if (seq - s->time > 0x4000)
421  seq -= 0x8000;
422  if (seq - s->time < -0x4000)
423  seq += 0x8000;
424 
425  if (seq != s->time) {
426  if (s->pict_type != AV_PICTURE_TYPE_B) {
427  s->time = seq;
428  s->pp_time = s->time - s->last_non_b_time;
429  s->last_non_b_time = s->time;
430  } else {
431  s->time = seq;
432  s->pb_time = s->pp_time - (s->last_non_b_time - s->time);
433  }
434  }
435  if (s->pict_type == AV_PICTURE_TYPE_B) {
436  if (s->pp_time <=s->pb_time || s->pp_time <= s->pp_time - s->pb_time || s->pp_time<=0) {
438  "messed up order, possible from seeking? skipping current B-frame\n");
439 #define ERROR_SKIP_FRAME -123
440  return ERROR_SKIP_FRAME;
441  }
443  }
444 
445  s->no_rounding = get_bits1(&s->gb);
446 
447  if (RV_GET_MINOR_VER(rv->sub_id) <= 1 && s->pict_type == AV_PICTURE_TYPE_B)
448  // binary decoder reads 3+2 bits here but they don't seem to be used
449  skip_bits(&s->gb, 5);
450 
451  s->f_code = 1;
452  s->unrestricted_mv = 1;
454  s->modified_quant = 1;
455  if (!s->avctx->lowres)
456  s->loop_filter = 1;
457 
458  if (s->avctx->debug & FF_DEBUG_PICT_INFO) {
460  "num:%5d x:%2d y:%2d type:%d qscale:%2d rnd:%d\n",
461  seq, s->mb_x, s->mb_y, s->pict_type, s->qscale,
462  s->no_rounding);
463  }
464 
466 
467  return s->mb_width * s->mb_height - mb_pos;
468 }
469 
471 {
472  RVDecContext *rv = avctx->priv_data;
473  MpegEncContext *s = &rv->m;
474  static int done = 0;
475  int major_ver, minor_ver, micro_ver, ret;
476 
477  if (avctx->extradata_size < 8) {
478  av_log(avctx, AV_LOG_ERROR, "Extradata is too small.\n");
479  return AVERROR_INVALIDDATA;
480  }
481  if ((ret = av_image_check_size(avctx->coded_width,
482  avctx->coded_height, 0, avctx)) < 0)
483  return ret;
484 
486  ff_mpv_decode_init(s, avctx);
487 
488  s->out_format = FMT_H263;
489 
490  rv->orig_width =
491  s->width = avctx->coded_width;
492  rv->orig_height =
493  s->height = avctx->coded_height;
494 
495  s->h263_long_vectors = ((uint8_t *) avctx->extradata)[3] & 1;
496  rv->sub_id = AV_RB32((uint8_t *) avctx->extradata + 4);
497 
498  major_ver = RV_GET_MAJOR_VER(rv->sub_id);
499  minor_ver = RV_GET_MINOR_VER(rv->sub_id);
500  micro_ver = RV_GET_MICRO_VER(rv->sub_id);
501 
502  s->low_delay = 1;
503  switch (major_ver) {
504  case 1:
505  s->rv10_version = micro_ver ? 3 : 1;
506  s->obmc = micro_ver == 2;
507  break;
508  case 2:
509  if (minor_ver >= 2) {
510  s->low_delay = 0;
511  s->avctx->has_b_frames = 1;
512  }
513  break;
514  default:
515  av_log(s->avctx, AV_LOG_ERROR, "unknown header %X\n", rv->sub_id);
516  avpriv_request_sample(avctx, "RV1/2 version");
517  return AVERROR_PATCHWELCOME;
518  }
519 
520  if (avctx->debug & FF_DEBUG_PICT_INFO) {
521  av_log(avctx, AV_LOG_DEBUG, "ver:%X ver0:%"PRIX32"\n", rv->sub_id,
522  ((uint32_t *) avctx->extradata)[0]);
523  }
524 
525  avctx->pix_fmt = AV_PIX_FMT_YUV420P;
526 
527  ff_mpv_idct_init(s);
528  if ((ret = ff_mpv_common_init(s)) < 0)
529  return ret;
530 
533 
534  /* init rv vlc */
535  if (!done) {
536  INIT_VLC_STATIC(&rv_dc_lum, DC_VLC_BITS, 256,
537  rv_lum_bits, 1, 1,
538  rv_lum_code, 2, 2, 16384);
539  INIT_VLC_STATIC(&rv_dc_chrom, DC_VLC_BITS, 256,
540  rv_chrom_bits, 1, 1,
541  rv_chrom_code, 2, 2, 16388);
542  done = 1;
543  }
544 
545  return 0;
546 }
547 
549 {
550  MpegEncContext *s = avctx->priv_data;
551 
553  return 0;
554 }
555 
556 static int rv10_decode_packet(AVCodecContext *avctx, const uint8_t *buf,
557  int buf_size, int buf_size2, int whole_size)
558 {
559  RVDecContext *rv = avctx->priv_data;
560  MpegEncContext *s = &rv->m;
561  int mb_count, mb_pos, left, start_mb_x, active_bits_size, ret;
562 
563  active_bits_size = buf_size * 8;
564  init_get_bits(&s->gb, buf, FFMAX(buf_size, buf_size2) * 8);
565  if (s->codec_id == AV_CODEC_ID_RV10)
566  mb_count = rv10_decode_picture_header(s);
567  else
568  mb_count = rv20_decode_picture_header(rv, whole_size);
569  if (mb_count < 0) {
570  if (mb_count != ERROR_SKIP_FRAME)
571  av_log(s->avctx, AV_LOG_ERROR, "HEADER ERROR\n");
572  return AVERROR_INVALIDDATA;
573  }
574 
575  if (s->mb_x >= s->mb_width ||
576  s->mb_y >= s->mb_height) {
577  av_log(s->avctx, AV_LOG_ERROR, "POS ERROR %d %d\n", s->mb_x, s->mb_y);
578  return AVERROR_INVALIDDATA;
579  }
580  mb_pos = s->mb_y * s->mb_width + s->mb_x;
581  left = s->mb_width * s->mb_height - mb_pos;
582  if (mb_count > left) {
583  av_log(s->avctx, AV_LOG_ERROR, "COUNT ERROR\n");
584  return AVERROR_INVALIDDATA;
585  }
586 
587  if (whole_size < s->mb_width * s->mb_height / 8)
588  return AVERROR_INVALIDDATA;
589 
590  if ((s->mb_x == 0 && s->mb_y == 0) || !s->current_picture_ptr) {
591  // FIXME write parser so we always have complete frames?
592  if (s->current_picture_ptr) {
593  ff_er_frame_end(&s->er);
594  ff_mpv_frame_end(s);
595  s->mb_x = s->mb_y = s->resync_mb_x = s->resync_mb_y = 0;
596  }
597  if ((ret = ff_mpv_frame_start(s, avctx)) < 0)
598  return ret;
600  } else {
601  if (s->current_picture_ptr->f->pict_type != s->pict_type) {
602  av_log(s->avctx, AV_LOG_ERROR, "Slice type mismatch\n");
603  return AVERROR_INVALIDDATA;
604  }
605  }
606 
607 
608  ff_dlog(avctx, "qscale=%d\n", s->qscale);
609 
610  /* default quantization values */
611  if (s->codec_id == AV_CODEC_ID_RV10) {
612  if (s->mb_y == 0)
613  s->first_slice_line = 1;
614  } else {
615  s->first_slice_line = 1;
616  s->resync_mb_x = s->mb_x;
617  }
618  start_mb_x = s->mb_x;
619  s->resync_mb_y = s->mb_y;
620  if (s->h263_aic) {
621  s->y_dc_scale_table =
623  } else {
624  s->y_dc_scale_table =
626  }
627 
628  if (s->modified_quant)
630 
631  ff_set_qscale(s, s->qscale);
632 
633  s->rv10_first_dc_coded[0] = 0;
634  s->rv10_first_dc_coded[1] = 0;
635  s->rv10_first_dc_coded[2] = 0;
636  s->block_wrap[0] =
637  s->block_wrap[1] =
638  s->block_wrap[2] =
639  s->block_wrap[3] = s->b8_stride;
640  s->block_wrap[4] =
641  s->block_wrap[5] = s->mb_stride;
643 
644  /* decode each macroblock */
645  for (s->mb_num_left = mb_count; s->mb_num_left > 0; s->mb_num_left--) {
646  int ret;
648  ff_tlog(avctx, "**mb x=%d y=%d\n", s->mb_x, s->mb_y);
649 
650  s->mv_dir = MV_DIR_FORWARD;
651  s->mv_type = MV_TYPE_16X16;
652  ret = ff_h263_decode_mb(s, s->block);
653 
654  // Repeat the slice end check from ff_h263_decode_mb with our active
655  // bitstream size
656  if (ret != SLICE_ERROR && active_bits_size >= get_bits_count(&s->gb)) {
657  int v = show_bits(&s->gb, 16);
658 
659  if (get_bits_count(&s->gb) + 16 > active_bits_size)
660  v >>= get_bits_count(&s->gb) + 16 - active_bits_size;
661 
662  if (!v)
663  ret = SLICE_END;
664  }
665  if (ret != SLICE_ERROR && active_bits_size < get_bits_count(&s->gb) &&
666  8 * buf_size2 >= get_bits_count(&s->gb)) {
667  active_bits_size = buf_size2 * 8;
668  av_log(avctx, AV_LOG_DEBUG, "update size from %d to %d\n",
669  8 * buf_size, active_bits_size);
670  ret = SLICE_OK;
671  }
672 
673  if (ret == SLICE_ERROR || active_bits_size < get_bits_count(&s->gb)) {
674  av_log(s->avctx, AV_LOG_ERROR, "ERROR at MB %d %d\n", s->mb_x,
675  s->mb_y);
676  return AVERROR_INVALIDDATA;
677  }
678  if (s->pict_type != AV_PICTURE_TYPE_B)
681  if (s->loop_filter)
683 
684  if (++s->mb_x == s->mb_width) {
685  s->mb_x = 0;
686  s->mb_y++;
688  }
689  if (s->mb_x == s->resync_mb_x)
690  s->first_slice_line = 0;
691  if (ret == SLICE_END)
692  break;
693  }
694 
695  ff_er_add_slice(&s->er, start_mb_x, s->resync_mb_y, s->mb_x - 1, s->mb_y,
696  ER_MB_END);
697 
698  return active_bits_size;
699 }
700 
701 static int get_slice_offset(AVCodecContext *avctx, const uint8_t *buf, int n)
702 {
703  if (avctx->slice_count)
704  return avctx->slice_offset[n];
705  else
706  return AV_RL32(buf + n * 8);
707 }
708 
709 static int rv10_decode_frame(AVCodecContext *avctx, void *data, int *got_frame,
710  AVPacket *avpkt)
711 {
712  const uint8_t *buf = avpkt->data;
713  int buf_size = avpkt->size;
714  MpegEncContext *s = avctx->priv_data;
715  AVFrame *pict = data;
716  int i, ret;
717  int slice_count;
718  const uint8_t *slices_hdr = NULL;
719 
720  ff_dlog(avctx, "*****frame %d size=%d\n", avctx->frame_number, buf_size);
721 
722  /* no supplementary picture */
723  if (buf_size == 0) {
724  return 0;
725  }
726 
727  if (!avctx->slice_count) {
728  slice_count = (*buf++) + 1;
729  buf_size--;
730 
731  if (!slice_count || buf_size <= 8 * slice_count) {
732  av_log(avctx, AV_LOG_ERROR, "Invalid slice count: %d.\n",
733  slice_count);
734  return AVERROR_INVALIDDATA;
735  }
736 
737  slices_hdr = buf + 4;
738  buf += 8 * slice_count;
739  buf_size -= 8 * slice_count;
740  } else
741  slice_count = avctx->slice_count;
742 
743  for (i = 0; i < slice_count; i++) {
744  unsigned offset = get_slice_offset(avctx, slices_hdr, i);
745  int size, size2;
746 
747  if (offset >= buf_size)
748  return AVERROR_INVALIDDATA;
749 
750  if (i + 1 == slice_count)
751  size = buf_size - offset;
752  else
753  size = get_slice_offset(avctx, slices_hdr, i + 1) - offset;
754 
755  if (i + 2 >= slice_count)
756  size2 = buf_size - offset;
757  else
758  size2 = get_slice_offset(avctx, slices_hdr, i + 2) - offset;
759 
760  if (size <= 0 || size2 <= 0 ||
761  offset + FFMAX(size, size2) > buf_size)
762  return AVERROR_INVALIDDATA;
763 
764  if ((ret = rv10_decode_packet(avctx, buf + offset, size, size2, buf_size)) < 0)
765  return ret;
766 
767  if (ret > 8 * size)
768  i++;
769  }
770 
771  if (s->current_picture_ptr && s->mb_y >= s->mb_height) {
772  ff_er_frame_end(&s->er);
773  ff_mpv_frame_end(s);
774 
775  if (s->pict_type == AV_PICTURE_TYPE_B || s->low_delay) {
776  if ((ret = av_frame_ref(pict, s->current_picture_ptr->f)) < 0)
777  return ret;
780  } else if (s->last_picture_ptr) {
781  if ((ret = av_frame_ref(pict, s->last_picture_ptr->f)) < 0)
782  return ret;
785  }
786 
787  if (s->last_picture_ptr || s->low_delay) {
788  *got_frame = 1;
789  }
790 
791  // so we can detect if frame_end was not called (find some nicer solution...)
793  }
794 
795  return avpkt->size;
796 }
797 
799  .name = "rv10",
800  .long_name = NULL_IF_CONFIG_SMALL("RealVideo 1.0"),
801  .type = AVMEDIA_TYPE_VIDEO,
802  .id = AV_CODEC_ID_RV10,
803  .priv_data_size = sizeof(RVDecContext),
805  .close = rv10_decode_end,
807  .capabilities = AV_CODEC_CAP_DR1,
808  .max_lowres = 3,
809  .pix_fmts = (const enum AVPixelFormat[]) {
812  },
813 };
814 
816  .name = "rv20",
817  .long_name = NULL_IF_CONFIG_SMALL("RealVideo 2.0"),
818  .type = AVMEDIA_TYPE_VIDEO,
819  .id = AV_CODEC_ID_RV20,
820  .priv_data_size = sizeof(RVDecContext),
822  .close = rv10_decode_end,
824  .capabilities = AV_CODEC_CAP_DR1 | AV_CODEC_CAP_DELAY,
825  .flush = ff_mpeg_flush,
826  .max_lowres = 3,
827  .pix_fmts = (const enum AVPixelFormat[]) {
830  },
831 };
int rv10_first_dc_coded[3]
Definition: mpegvideo.h:421
#define ff_tlog(ctx,...)
Definition: internal.h:86
#define NULL
Definition: coverity.c:32
#define SLICE_ERROR
Definition: mpegvideo.h:517
void ff_init_block_index(MpegEncContext *s)
Definition: mpegvideo.c:2279
#define AVERROR_INVALIDDATA
Invalid data found when processing input.
Definition: error.h:59
int size
This structure describes decoded (raw) audio or video data.
Definition: frame.h:300
static int get_slice_offset(AVCodecContext *avctx, const uint8_t *buf, int n)
Definition: rv10.c:701
static void flush(AVCodecContext *avctx)
const uint8_t * y_dc_scale_table
qscale -> y_dc_scale table
Definition: mpegvideo.h:188
int coded_width
Bitstream width / height, may be different from width/height e.g.
Definition: avcodec.h:714
misc image utilities
static unsigned int get_bits(GetBitContext *s, int n)
Read 1-25 bits.
Definition: get_bits.h:379
#define ER_MB_END
static const uint16_t rv_chrom_code[256]
Definition: rv10.c:126
int ff_set_dimensions(AVCodecContext *s, int width, int height)
Check that the provided frame dimensions are valid and set them on the codec context.
Definition: utils.c:104
static av_cold int init(AVCodecContext *avctx)
Definition: avrndec.c:35
#define INIT_VLC_STATIC(vlc, bits, a, b, c, d, e, f, g, static_size)
Definition: vlc.h:75
#define avpriv_request_sample(...)
void ff_er_frame_end(ERContext *s)
int orig_height
Definition: rv10.c:53
int num
Numerator.
Definition: rational.h:59
av_cold void ff_h263dsp_init(H263DSPContext *ctx)
Definition: h263dsp.c:117
int size
Definition: packet.h:356
enum AVCodecID codec_id
Definition: mpegvideo.h:112
AVCodec ff_rv20_decoder
Definition: rv10.c:815
int sub_id
Definition: rv10.c:52
int obmc
overlapped block motion compensation
Definition: mpegvideo.h:366
AVRational sample_aspect_ratio
sample aspect ratio (0 if unknown) That is the width of a pixel divided by the height of the pixel...
Definition: avcodec.h:905
enum AVPixelFormat pix_fmt
Pixel format, see AV_PIX_FMT_xxx.
Definition: avcodec.h:736
mpegvideo header.
#define SLICE_OK
Definition: mpegvideo.h:516
static int rv20_decode_picture_header(RVDecContext *rv, int whole_size)
Definition: rv10.c:308
static int rv10_decode_picture_header(MpegEncContext *s)
Definition: rv10.c:249
AVCodec.
Definition: codec.h:190
int qscale
QP.
Definition: mpegvideo.h:204
int h263_aic
Advanced INTRA Coding (AIC)
Definition: mpegvideo.h:87
static void decode(AVCodecContext *dec_ctx, AVPacket *pkt, AVFrame *frame, FILE *outfile)
Definition: decode_audio.c:71
int block_wrap[6]
Definition: mpegvideo.h:294
int ff_h263_decode_mb(MpegEncContext *s, int16_t block[6][64])
Definition: ituh263dec.c:697
int modified_quant
Definition: mpegvideo.h:379
#define AV_CODEC_CAP_DELAY
Encoder or decoder requires flushing with NULL input at the end in order to give the complete and cor...
Definition: codec.h:75
#define av_assert0(cond)
assert() equivalent, that is always enabled.
Definition: avassert.h:37
int mb_num_left
number of MBs left in this video packet (for partitioned Slices only)
Definition: mpegvideo.h:359
int64_t time
time of current frame
Definition: mpegvideo.h:390
const uint8_t ff_mpeg1_dc_scale_table[128]
Definition: mpegvideodata.c:33
void ff_h263_decode_init_vlc(void)
Definition: ituh263dec.c:108
uint8_t
#define av_cold
Definition: attributes.h:88
enum OutputFormat out_format
output format
Definition: mpegvideo.h:104
#define FF_DEBUG_PICT_INFO
Definition: avcodec.h:1612
#define f(width, name)
Definition: cbs_vp9.c:255
#define AV_RB32
Definition: intreadwrite.h:130
#define RV_GET_MICRO_VER(x)
Definition: rv10.c:46
int av_frame_ref(AVFrame *dst, const AVFrame *src)
Set up a new reference to the data described by the source frame.
Definition: frame.c:444
int ff_rv_decode_dc(MpegEncContext *s, int n)
Definition: rv10.c:198
uint8_t * extradata
some codecs need / can use extradata like Huffman tables.
Definition: avcodec.h:627
int no_rounding
apply no rounding to motion compensation (MPEG-4, msmpeg4, ...) for B-frames rounding mode is always ...
Definition: mpegvideo.h:284
H.263 tables.
const char data[16]
Definition: mxf.c:91
uint8_t * data
Definition: packet.h:355
static int get_bits_count(const GetBitContext *s)
Definition: get_bits.h:219
MpegEncContext m
Definition: rv10.c:51
int ff_h263_decode_mba(MpegEncContext *s)
Definition: ituh263dec.c:139
#define ff_dlog(a,...)
#define ERROR_SKIP_FRAME
uint16_t pp_time
time distance between the last 2 p,s,i frames
Definition: mpegvideo.h:392
av_cold void ff_mpv_idct_init(MpegEncContext *s)
Definition: mpegvideo.c:329
int mb_height
number of MBs horizontally & vertically
Definition: mpegvideo.h:129
int lowres
low resolution decoding, 1-> 1/2 size, 2->1/4 size
Definition: avcodec.h:1765
#define av_log(a,...)
static void ff_update_block_index(MpegEncContext *s)
Definition: mpegvideo.h:740
void ff_set_qscale(MpegEncContext *s, int qscale)
set qscale and update qscale dependent variables.
Definition: mpegvideo.c:2343
static int rv10_decode_packet(AVCodecContext *avctx, const uint8_t *buf, int buf_size, int buf_size2, int whole_size)
Definition: rv10.c:556
int slice_count
slice count
Definition: avcodec.h:880
H263DSPContext h263dsp
Definition: mpegvideo.h:237
#define i(width, name, range_min, range_max)
Definition: cbs_h2645.c:269
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
Definition: log.h:176
int has_b_frames
Size of the frame reordering buffer in the decoder.
Definition: avcodec.h:816
int last_dc[3]
last DC values for MPEG-1
Definition: mpegvideo.h:185
AVCodec ff_rv10_decoder
Definition: rv10.c:798
void ff_er_add_slice(ERContext *s, int startx, int starty, int endx, int endy, int status)
Add a slice.
int unrestricted_mv
mv can point outside of the coded picture
Definition: mpegvideo.h:223
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification. ...
Definition: internal.h:188
ERContext er
Definition: mpegvideo.h:566
const uint8_t * code
Definition: spdifenc.c:413
#define AV_LOG_DEBUG
Stuff which is only useful for libav* developers.
Definition: log.h:197
#define RV_GET_MINOR_VER(x)
Definition: rv10.c:45
void ff_mpeg4_init_direct_mv(MpegEncContext *s)
Definition: mpeg4video.c:71
const char * name
Name of the codec implementation.
Definition: codec.h:197
int low_delay
no reordering needed / has no B-frames
Definition: mpegvideo.h:406
GetBitContext gb
Definition: mpegvideo.h:448
static const uint8_t offset[127][2]
Definition: vf_spp.c:93
void ff_mpv_common_end(MpegEncContext *s)
Definition: mpegvideo.c:1138
#define FFMAX(a, b)
Definition: common.h:94
Definition: vlc.h:26
void ff_mpeg_flush(AVCodecContext *avctx)
Definition: mpegvideo.c:2312
int resync_mb_x
x position of last resync marker
Definition: mpegvideo.h:356
int av_image_check_size(unsigned int w, unsigned int h, int log_offset, void *log_ctx)
Check if the given dimension of an image is valid, meaning that all bytes of the image can be address...
Definition: imgutils.c:282
void ff_h263_loop_filter(MpegEncContext *s)
Definition: h263.c:135
int ff_mpv_export_qp_table(MpegEncContext *s, AVFrame *f, Picture *p, int qp_type)
Definition: mpegvideo.c:1451
enum AVPictureType pict_type
Picture type of the frame.
Definition: frame.h:383
const uint8_t ff_h263_chroma_qscale_table[32]
Definition: h263data.c:262
#define RV_GET_MAJOR_VER(x)
Definition: rv10.c:44
#define DC_VLC_BITS
Definition: rv10.c:48
Picture * current_picture_ptr
pointer to the current picture
Definition: mpegvideo.h:184
void ff_mpeg_er_frame_start(MpegEncContext *s)
Definition: mpeg_er.c:46
static unsigned int show_bits(GetBitContext *s, int n)
Show 1-25 bits.
Definition: get_bits.h:446
static int rv10_decode_frame(AVCodecContext *avctx, void *data, int *got_frame, AVPacket *avpkt)
Definition: rv10.c:709
#define s(width, name)
Definition: cbs_vp9.c:257
static av_always_inline int get_vlc2(GetBitContext *s, VLC_TYPE(*table)[2], int bits, int max_depth)
Parse a vlc code.
Definition: get_bits.h:797
#define AV_RL32
Definition: intreadwrite.h:146
static const uint8_t rv_chrom_bits[256]
Definition: rv10.c:161
static av_cold int rv10_decode_end(AVCodecContext *avctx)
Definition: rv10.c:548
void ff_mpv_decode_defaults(MpegEncContext *s)
Set the given MpegEncContext to defaults for decoding.
Definition: mpegvideo.c:667
#define av_log2
Definition: intmath.h:83
#define AVERROR_PATCHWELCOME
Not yet implemented in FFmpeg, patches welcome.
Definition: error.h:62
#define MV_TYPE_16X16
1 vector for the whole mb
Definition: mpegvideo.h:266
int first_slice_line
used in MPEG-4 too to handle resync markers
Definition: mpegvideo.h:436
const uint8_t ff_aic_dc_scale_table[32]
Definition: h263data.c:247
static av_cold int rv10_decode_init(AVCodecContext *avctx)
Definition: rv10.c:470
#define AV_LOG_INFO
Standard information.
Definition: log.h:187
int64_t last_non_b_time
Definition: mpegvideo.h:391
static const uint16_t rv_lum_code[256]
Definition: rv10.c:56
Libavcodec external API header.
void ff_h263_update_motion_val(MpegEncContext *s)
Definition: h263.c:42
int debug
debug
Definition: avcodec.h:1611
main external API structure.
Definition: avcodec.h:526
long long int64_t
Definition: coverity.c:34
int height
picture size. must be a multiple of 16
Definition: mpegvideo.h:100
void ff_print_debug_info(MpegEncContext *s, Picture *p, AVFrame *pict)
Definition: mpegvideo.c:1444
#define SLICE_END
end marker found
Definition: mpegvideo.h:518
int extradata_size
Definition: avcodec.h:628
static unsigned int get_bits1(GetBitContext *s)
Definition: get_bits.h:498
int coded_height
Definition: avcodec.h:714
static void skip_bits(GetBitContext *s, int n)
Definition: get_bits.h:467
Rational number (pair of numerator and denominator).
Definition: rational.h:58
struct AVFrame * f
Definition: mpegpicture.h:46
static int init_get_bits(GetBitContext *s, const uint8_t *buffer, int bit_size)
Initialize GetBitContext.
Definition: get_bits.h:659
int ff_mpv_frame_start(MpegEncContext *s, AVCodecContext *avctx)
generic function called after decoding the header and before a frame is decoded.
Definition: mpegvideo.c:1212
int f_code
forward MV resolution
Definition: mpegvideo.h:238
#define MV_DIR_FORWARD
Definition: mpegvideo.h:262
int pict_type
AV_PICTURE_TYPE_I, AV_PICTURE_TYPE_P, AV_PICTURE_TYPE_B, ...
Definition: mpegvideo.h:212
static enum AVPixelFormat pix_fmts[]
Definition: libkvazaar.c:275
const uint8_t * c_dc_scale_table
qscale -> c_dc_scale table
Definition: mpegvideo.h:189
int b8_stride
2*mb_width+1 used for some 8x8 block arrays to allow simple addressing
Definition: mpegvideo.h:131
MpegEncContext.
Definition: mpegvideo.h:81
struct AVCodecContext * avctx
Definition: mpegvideo.h:98
planar YUV 4:2:0, 12bpp, (1 Cr & Cb sample per 2x2 Y samples)
Definition: pixfmt.h:66
common internal api header.
int mb_stride
mb_width+1 used for some arrays to allow simple addressing of left & top MBs without sig11 ...
Definition: mpegvideo.h:130
void ff_mpv_decode_init(MpegEncContext *s, AVCodecContext *avctx)
Definition: mpegvideo.c:672
Picture * last_picture_ptr
pointer to the previous picture.
Definition: mpegvideo.h:182
Bi-dir predicted.
Definition: avutil.h:276
const uint8_t * chroma_qscale_table
qscale -> chroma_qscale (H.263)
Definition: mpegvideo.h:190
void * priv_data
Definition: avcodec.h:553
av_cold int ff_mpv_common_init(MpegEncContext *s)
init common structure for both encoder and decoder.
Definition: mpegvideo.c:890
void ff_mpv_frame_end(MpegEncContext *s)
Definition: mpegvideo.c:1436
static const uint8_t rv_lum_bits[256]
Definition: rv10.c:91
void ff_mpv_reconstruct_mb(MpegEncContext *s, int16_t block[12][64])
Definition: mpegvideo.c:2260
int resync_mb_y
y position of last resync marker
Definition: mpegvideo.h:357
int16_t(* block)[64]
points to one of the following blocks
Definition: mpegvideo.h:508
VLC_TYPE(* table)[2]
code, bits
Definition: vlc.h:28
AVRational av_mul_q(AVRational b, AVRational c)
Multiply two rationals.
Definition: rational.c:80
int * slice_offset
slice offsets in the frame in bytes
Definition: avcodec.h:896
int frame_number
Frame counter, set by libavcodec.
Definition: avcodec.h:1217
int rv10_version
RV10 version: 0 or 3.
Definition: mpegvideo.h:420
int h263_long_vectors
use horrible H.263v1 long vector mode
Definition: mpegvideo.h:224
static VLC rv_dc_lum
Definition: rv10.c:196
int orig_width
Definition: rv10.c:53
#define FF_QSCALE_TYPE_MPEG1
Definition: internal.h:92
AVPixelFormat
Pixel format.
Definition: pixfmt.h:64
This structure stores compressed data.
Definition: packet.h:332
#define AV_CODEC_CAP_DR1
Codec uses get_buffer() for allocating buffers and supports custom allocators.
Definition: codec.h:50
Predicted.
Definition: avutil.h:275
uint16_t pb_time
time distance between the last b and p,s,i frame
Definition: mpegvideo.h:393
static VLC rv_dc_chrom
Definition: rv10.c:196