FFmpeg coverage


Directory: ../../../ffmpeg/
File: src/libavcodec/rv10.c
Date: 2021-09-26 18:22:30
Exec Total Coverage
Lines: 266 369 72.1%
Branches: 152 242 62.8%

Line Branch Exec Source
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 #include "libavutil/thread.h"
32
33 #include "avcodec.h"
34 #include "error_resilience.h"
35 #include "h263.h"
36 #include "h263data.h"
37 #include "internal.h"
38 #include "mpeg_er.h"
39 #include "mpegutils.h"
40 #include "mpegvideo.h"
41 #include "mpeg4video.h"
42 #include "mpegvideodata.h"
43 #include "rv10.h"
44
45 #define RV_GET_MAJOR_VER(x) ((x) >> 28)
46 #define RV_GET_MINOR_VER(x) (((x) >> 20) & 0xFF)
47 #define RV_GET_MICRO_VER(x) (((x) >> 12) & 0xFF)
48
49 #define MAX_VLC_ENTRIES 1023 // Note: Does not include the skip entries.
50 #define DC_VLC_BITS 9
51
52 typedef struct RVDecContext {
53 MpegEncContext m;
54 int sub_id;
55 int orig_width, orig_height;
56 } RVDecContext;
57
58 /* (run, length) encoded value for the symbols table. The actual symbols
59 * are run..run - length (mod 256).
60 * The last two entries in the following table apply to luma only.
61 * The skip values are not included in this list. */
62 static const uint8_t rv_sym_run_len[][2] = {
63 { 0, 0 }, { 1, 0 }, { 255, 0 }, { 3, 1 }, { 254, 1 },
64 { 7, 3 }, { 252, 3 }, { 15, 7 }, { 248, 7 }, { 31, 15 },
65 { 240, 15 }, { 63, 31 }, { 224, 31 }, { 127, 63 }, { 192, 63 },
66 { 255, 127 }, { 128, 127 }, { 127, 255 }, { 128, 255 },
67 };
68
69 /* entry[i] of the following tables gives
70 * the number of VLC codes of length i + 2. */
71 static const uint16_t rv_lum_len_count[15] = {
72 1, 0, 2, 4, 8, 16, 32, 0, 64, 0, 128, 0, 256, 0, 512,
73 };
74
75 static const uint16_t rv_chrom_len_count[15] = {
76 1, 2, 4, 0, 8, 0, 16, 0, 32, 0, 64, 0, 128, 0, 256,
77 };
78
79 static VLC rv_dc_lum, rv_dc_chrom;
80
81 int ff_rv_decode_dc(MpegEncContext *s, int n)
82 {
83 int code;
84
85 if (n < 4) {
86 code = get_vlc2(&s->gb, rv_dc_lum.table, DC_VLC_BITS, 2);
87 } else {
88 code = get_vlc2(&s->gb, rv_dc_chrom.table, DC_VLC_BITS, 2);
89 if (code < 0) {
90 av_log(s->avctx, AV_LOG_ERROR, "chroma dc error\n");
91 return -1;
92 }
93 }
94 return code;
95 }
96
97 /* read RV 1.0 compatible frame header */
98 150 static int rv10_decode_picture_header(MpegEncContext *s)
99 {
100 int mb_count, pb_frame, marker, mb_xy;
101
102 150 marker = get_bits1(&s->gb);
103
104
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150 if (get_bits1(&s->gb))
105 135 s->pict_type = AV_PICTURE_TYPE_P;
106 else
107 15 s->pict_type = AV_PICTURE_TYPE_I;
108
109
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150 if (!marker)
110 av_log(s->avctx, AV_LOG_ERROR, "marker missing\n");
111
112 150 pb_frame = get_bits1(&s->gb);
113
114 ff_dlog(s->avctx, "pict_type=%d pb_frame=%d\n", s->pict_type, pb_frame);
115
116
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150 if (pb_frame) {
117 avpriv_request_sample(s->avctx, "PB-frame");
118 return AVERROR_PATCHWELCOME;
119 }
120
121 150 s->qscale = get_bits(&s->gb, 5);
122
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150 if (s->qscale == 0) {
123 av_log(s->avctx, AV_LOG_ERROR, "Invalid qscale value: 0\n");
124 return AVERROR_INVALIDDATA;
125 }
126
127
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150 if (s->pict_type == AV_PICTURE_TYPE_I) {
128
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15 if (s->rv10_version == 3) {
129 /* specific MPEG like DC coding not used */
130 s->last_dc[0] = get_bits(&s->gb, 8);
131 s->last_dc[1] = get_bits(&s->gb, 8);
132 s->last_dc[2] = get_bits(&s->gb, 8);
133 ff_dlog(s->avctx, "DC:%d %d %d\n", s->last_dc[0],
134 s->last_dc[1], s->last_dc[2]);
135 }
136 }
137 /* if multiple packets per frame are sent, the position at which
138 * to display the macroblocks is coded here */
139
140 150 mb_xy = s->mb_x + s->mb_y * s->mb_width;
141
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150 if (show_bits(&s->gb, 12) == 0 || (mb_xy && mb_xy < s->mb_num)) {
142 150 s->mb_x = get_bits(&s->gb, 6); /* mb_x */
143 150 s->mb_y = get_bits(&s->gb, 6); /* mb_y */
144 150 mb_count = get_bits(&s->gb, 12);
145 } else {
146 s->mb_x = 0;
147 s->mb_y = 0;
148 mb_count = s->mb_width * s->mb_height;
149 }
150 150 skip_bits(&s->gb, 3); /* ignored */
151 150 s->f_code = 1;
152 150 s->unrestricted_mv = 1;
153
154 150 return mb_count;
155 }
156
157 742 static int rv20_decode_picture_header(RVDecContext *rv, int whole_size)
158 {
159 742 MpegEncContext *s = &rv->m;
160 int seq, mb_pos, i, ret;
161 int rpr_max;
162
163 742 i = get_bits(&s->gb, 2);
164
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742 switch (i) {
165 52 case 0:
166 52 s->pict_type = AV_PICTURE_TYPE_I;
167 52 break;
168 15 case 1:
169 15 s->pict_type = AV_PICTURE_TYPE_I;
170 15 break; // hmm ...
171 494 case 2:
172 494 s->pict_type = AV_PICTURE_TYPE_P;
173 494 break;
174 181 case 3:
175 181 s->pict_type = AV_PICTURE_TYPE_B;
176 181 break;
177 default:
178 av_log(s->avctx, AV_LOG_ERROR, "unknown frame type\n");
179 return AVERROR_INVALIDDATA;
180 }
181
182
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742 if (s->low_delay && s->pict_type == AV_PICTURE_TYPE_B) {
183 av_log(s->avctx, AV_LOG_ERROR, "low delay B\n");
184 return -1;
185 }
186
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742 if (!s->last_picture_ptr && s->pict_type == AV_PICTURE_TYPE_B) {
187 av_log(s->avctx, AV_LOG_ERROR, "early B-frame\n");
188 return AVERROR_INVALIDDATA;
189 }
190
191
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742 if (get_bits1(&s->gb)) {
192 av_log(s->avctx, AV_LOG_ERROR, "reserved bit set\n");
193 return AVERROR_INVALIDDATA;
194 }
195
196 742 s->qscale = get_bits(&s->gb, 5);
197
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742 if (s->qscale == 0) {
198 av_log(s->avctx, AV_LOG_ERROR, "Invalid qscale value: 0\n");
199 return AVERROR_INVALIDDATA;
200 }
201
202
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742 if (RV_GET_MINOR_VER(rv->sub_id) >= 2)
203
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592 s->loop_filter = get_bits1(&s->gb) && !s->avctx->lowres;
204
205
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742 if (RV_GET_MINOR_VER(rv->sub_id) <= 1)
206 150 seq = get_bits(&s->gb, 8) << 7;
207 else
208 592 seq = get_bits(&s->gb, 13) << 2;
209
210 742 rpr_max = s->avctx->extradata[1] & 7;
211
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742 if (rpr_max) {
212 int f, new_w, new_h;
213 592 int rpr_bits = av_log2(rpr_max) + 1;
214
215 592 f = get_bits(&s->gb, rpr_bits);
216
217
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592 if (f) {
218 if (s->avctx->extradata_size < 8 + 2 * f) {
219 av_log(s->avctx, AV_LOG_ERROR, "Extradata too small.\n");
220 return AVERROR_INVALIDDATA;
221 }
222
223 new_w = 4 * ((uint8_t *) s->avctx->extradata)[6 + 2 * f];
224 new_h = 4 * ((uint8_t *) s->avctx->extradata)[7 + 2 * f];
225 } else {
226 592 new_w = rv->orig_width;
227 592 new_h = rv->orig_height;
228 }
229
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592 if (new_w != s->width || new_h != s->height || !s->context_initialized) {
230 AVRational old_aspect = s->avctx->sample_aspect_ratio;
231 av_log(s->avctx, AV_LOG_DEBUG,
232 "attempting to change resolution to %dx%d\n", new_w, new_h);
233 if (av_image_check_size(new_w, new_h, 0, s->avctx) < 0)
234 return AVERROR_INVALIDDATA;
235
236 if (whole_size < (new_w + 15)/16 * ((new_h + 15)/16) / 8)
237 return AVERROR_INVALIDDATA;
238
239 ff_mpv_common_end(s);
240
241 // attempt to keep aspect during typical resolution switches
242 if (!old_aspect.num)
243 old_aspect = (AVRational){1, 1};
244 if (2 * (int64_t)new_w * s->height == (int64_t)new_h * s->width)
245 s->avctx->sample_aspect_ratio = av_mul_q(old_aspect, (AVRational){2, 1});
246 if ((int64_t)new_w * s->height == 2 * (int64_t)new_h * s->width)
247 s->avctx->sample_aspect_ratio = av_mul_q(old_aspect, (AVRational){1, 2});
248
249 ret = ff_set_dimensions(s->avctx, new_w, new_h);
250 if (ret < 0)
251 return ret;
252
253 s->width = new_w;
254 s->height = new_h;
255 if ((ret = ff_mpv_common_init(s)) < 0)
256 return ret;
257 }
258
259
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592 if (s->avctx->debug & FF_DEBUG_PICT_INFO) {
260 av_log(s->avctx, AV_LOG_DEBUG, "F %d/%d/%d\n", f, rpr_bits, rpr_max);
261 }
262 }
263
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742 if (av_image_check_size(s->width, s->height, 0, s->avctx) < 0)
264 return AVERROR_INVALIDDATA;
265
266 742 mb_pos = ff_h263_decode_mba(s);
267
268 742 seq |= s->time & ~0x7FFF;
269
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742 if (seq - s->time > 0x4000)
270 seq -= 0x8000;
271
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742 if (seq - s->time < -0x4000)
272 seq += 0x8000;
273
274
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742 if (seq != s->time) {
275
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292 if (s->pict_type != AV_PICTURE_TYPE_B) {
276 220 s->time = seq;
277 220 s->pp_time = s->time - s->last_non_b_time;
278 220 s->last_non_b_time = s->time;
279 } else {
280 72 s->time = seq;
281 72 s->pb_time = s->pp_time - (s->last_non_b_time - s->time);
282 }
283 }
284
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742 if (s->pict_type == AV_PICTURE_TYPE_B) {
285
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181 if (s->pp_time <=s->pb_time || s->pp_time <= s->pp_time - s->pb_time || s->pp_time<=0) {
286 av_log(s->avctx, AV_LOG_DEBUG,
287 "messed up order, possible from seeking? skipping current B-frame\n");
288 #define ERROR_SKIP_FRAME -123
289 return ERROR_SKIP_FRAME;
290 }
291 181 ff_mpeg4_init_direct_mv(s);
292 }
293
294 742 s->no_rounding = get_bits1(&s->gb);
295
296
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742 if (RV_GET_MINOR_VER(rv->sub_id) <= 1 && s->pict_type == AV_PICTURE_TYPE_B)
297 // binary decoder reads 3+2 bits here but they don't seem to be used
298 skip_bits(&s->gb, 5);
299
300 742 s->f_code = 1;
301 742 s->unrestricted_mv = 1;
302 742 s->h263_aic = s->pict_type == AV_PICTURE_TYPE_I;
303 742 s->modified_quant = 1;
304
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742 if (!s->avctx->lowres)
305 150 s->loop_filter = 1;
306
307
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742 if (s->avctx->debug & FF_DEBUG_PICT_INFO) {
308 av_log(s->avctx, AV_LOG_INFO,
309 "num:%5d x:%2d y:%2d type:%d qscale:%2d rnd:%d\n",
310 seq, s->mb_x, s->mb_y, s->pict_type, s->qscale,
311 s->no_rounding);
312 }
313
314
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742 av_assert0(s->pict_type != AV_PICTURE_TYPE_B || !s->low_delay);
315
316 742 return s->mb_width * s->mb_height - mb_pos;
317 }
318
319 26 static av_cold void rv10_build_vlc(VLC *vlc, const uint16_t len_count[15],
320 const uint8_t sym_rl[][2], int sym_rl_elems)
321 {
322 uint16_t syms[MAX_VLC_ENTRIES];
323 uint8_t lens[MAX_VLC_ENTRIES];
324 26 unsigned nb_syms = 0, nb_lens = 0;
325
326
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494 for (unsigned i = 0; i < sym_rl_elems; i++) {
327 468 unsigned cur_sym = sym_rl[i][0];
328
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20410 for (unsigned tmp = nb_syms + sym_rl[i][1]; nb_syms <= tmp; nb_syms++)
329 19942 syms[nb_syms] = 0xFF & cur_sym--;
330 }
331
332
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416 for (unsigned i = 0; i < 15; i++)
333
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20332 for (unsigned tmp = nb_lens + len_count[i]; nb_lens < tmp; nb_lens++)
334 19942 lens[nb_lens] = i + 2;
335 av_assert1(nb_lens == nb_syms);
336 26 ff_init_vlc_from_lengths(vlc, DC_VLC_BITS, nb_lens, lens, 1,
337 syms, 2, 2, 0, INIT_VLC_STATIC_OVERLONG, NULL);
338 26 }
339
340 13 static av_cold void rv10_init_static(void)
341 {
342 static VLC_TYPE table[1472 + 992][2];
343
344 13 rv_dc_lum.table = table;
345 13 rv_dc_lum.table_allocated = 1472;
346 13 rv10_build_vlc(&rv_dc_lum, rv_lum_len_count,
347 rv_sym_run_len, FF_ARRAY_ELEMS(rv_sym_run_len));
348
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65 for (int i = 0; i < 1 << (DC_VLC_BITS - 7 /* Length of skip prefix */); i++) {
349 /* All codes beginning with 0x7F have the same length and value.
350 * Modifying the table directly saves us the useless subtables. */
351 52 rv_dc_lum.table[(0x7F << (DC_VLC_BITS - 7)) + i][0] = 255;
352 52 rv_dc_lum.table[(0x7F << (DC_VLC_BITS - 7)) + i][1] = 18;
353 }
354 13 rv_dc_chrom.table = &table[1472];
355 13 rv_dc_chrom.table_allocated = 992;
356 13 rv10_build_vlc(&rv_dc_chrom, rv_chrom_len_count,
357 rv_sym_run_len, FF_ARRAY_ELEMS(rv_sym_run_len) - 2);
358
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26 for (int i = 0; i < 1 << (DC_VLC_BITS - 9 /* Length of skip prefix */); i++) {
359 /* Same as above. */
360 13 rv_dc_chrom.table[(0x1FE << (DC_VLC_BITS - 9)) + i][0] = 255;
361 13 rv_dc_chrom.table[(0x1FE << (DC_VLC_BITS - 9)) + i][1] = 18;
362 }
363 13 ff_h263_decode_init_vlc();
364 13 }
365
366 20 static av_cold int rv10_decode_init(AVCodecContext *avctx)
367 {
368 static AVOnce init_static_once = AV_ONCE_INIT;
369 20 RVDecContext *rv = avctx->priv_data;
370 20 MpegEncContext *s = &rv->m;
371 int major_ver, minor_ver, micro_ver, ret;
372
373
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20 if (avctx->extradata_size < 8) {
374 av_log(avctx, AV_LOG_ERROR, "Extradata is too small.\n");
375 return AVERROR_INVALIDDATA;
376 }
377
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20 if ((ret = av_image_check_size(avctx->coded_width,
378 20 avctx->coded_height, 0, avctx)) < 0)
379 return ret;
380
381 20 ff_mpv_decode_init(s, avctx);
382
383 20 s->out_format = FMT_H263;
384
385 20 rv->orig_width =
386 20 s->width = avctx->coded_width;
387 20 rv->orig_height =
388 20 s->height = avctx->coded_height;
389
390 20 s->h263_long_vectors = ((uint8_t *) avctx->extradata)[3] & 1;
391 20 rv->sub_id = AV_RB32((uint8_t *) avctx->extradata + 4);
392
393 20 major_ver = RV_GET_MAJOR_VER(rv->sub_id);
394 20 minor_ver = RV_GET_MINOR_VER(rv->sub_id);
395 20 micro_ver = RV_GET_MICRO_VER(rv->sub_id);
396
397 20 s->low_delay = 1;
398
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20 switch (major_ver) {
399 9 case 1:
400
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9 s->rv10_version = micro_ver ? 3 : 1;
401 9 s->obmc = micro_ver == 2;
402 9 break;
403 11 case 2:
404
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11 if (minor_ver >= 2) {
405 3 s->low_delay = 0;
406 3 s->avctx->has_b_frames = 1;
407 }
408 11 break;
409 default:
410 av_log(s->avctx, AV_LOG_ERROR, "unknown header %X\n", rv->sub_id);
411 avpriv_request_sample(avctx, "RV1/2 version");
412 return AVERROR_PATCHWELCOME;
413 }
414
415
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20 if (avctx->debug & FF_DEBUG_PICT_INFO) {
416 av_log(avctx, AV_LOG_DEBUG, "ver:%X ver0:%"PRIX32"\n", rv->sub_id,
417 ((uint32_t *) avctx->extradata)[0]);
418 }
419
420 20 avctx->pix_fmt = AV_PIX_FMT_YUV420P;
421
422 20 ff_mpv_idct_init(s);
423
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20 if ((ret = ff_mpv_common_init(s)) < 0)
424 return ret;
425
426 20 ff_h263dsp_init(&s->h263dsp);
427
428 /* init static VLCs */
429 20 ff_thread_once(&init_static_once, rv10_init_static);
430
431 20 return 0;
432 }
433
434 20 static av_cold int rv10_decode_end(AVCodecContext *avctx)
435 {
436 20 MpegEncContext *s = avctx->priv_data;
437
438 20 ff_mpv_common_end(s);
439 20 return 0;
440 }
441
442 892 static int rv10_decode_packet(AVCodecContext *avctx, const uint8_t *buf,
443 int buf_size, int buf_size2, int whole_size)
444 {
445 892 RVDecContext *rv = avctx->priv_data;
446 892 MpegEncContext *s = &rv->m;
447 int mb_count, mb_pos, left, start_mb_x, active_bits_size, ret;
448
449 892 active_bits_size = buf_size * 8;
450 892 init_get_bits(&s->gb, buf, FFMAX(buf_size, buf_size2) * 8);
451
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892 if (s->codec_id == AV_CODEC_ID_RV10)
452 150 mb_count = rv10_decode_picture_header(s);
453 else
454 742 mb_count = rv20_decode_picture_header(rv, whole_size);
455
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892 if (mb_count < 0) {
456 if (mb_count != ERROR_SKIP_FRAME)
457 av_log(s->avctx, AV_LOG_ERROR, "HEADER ERROR\n");
458 return AVERROR_INVALIDDATA;
459 }
460
461
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892 if (s->mb_x >= s->mb_width ||
462
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892 s->mb_y >= s->mb_height) {
463 av_log(s->avctx, AV_LOG_ERROR, "POS ERROR %d %d\n", s->mb_x, s->mb_y);
464 return AVERROR_INVALIDDATA;
465 }
466 892 mb_pos = s->mb_y * s->mb_width + s->mb_x;
467 892 left = s->mb_width * s->mb_height - mb_pos;
468
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892 if (mb_count > left) {
469 av_log(s->avctx, AV_LOG_ERROR, "COUNT ERROR\n");
470 return AVERROR_INVALIDDATA;
471 }
472
473
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892 if (whole_size < s->mb_width * s->mb_height / 8)
474 return AVERROR_INVALIDDATA;
475
476
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892 if ((s->mb_x == 0 && s->mb_y == 0) || !s->current_picture_ptr) {
477 // FIXME write parser so we always have complete frames?
478
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445 if (s->current_picture_ptr) {
479 ff_er_frame_end(&s->er);
480 ff_mpv_frame_end(s);
481 s->mb_x = s->mb_y = s->resync_mb_x = s->resync_mb_y = 0;
482 }
483
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445 if ((ret = ff_mpv_frame_start(s, avctx)) < 0)
484 return ret;
485 445 ff_mpeg_er_frame_start(s);
486 } else {
487
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447 if (s->current_picture_ptr->f->pict_type != s->pict_type) {
488 av_log(s->avctx, AV_LOG_ERROR, "Slice type mismatch\n");
489 return AVERROR_INVALIDDATA;
490 }
491 }
492
493
494 ff_dlog(avctx, "qscale=%d\n", s->qscale);
495
496 /* default quantization values */
497
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892 if (s->codec_id == AV_CODEC_ID_RV10) {
498
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150 if (s->mb_y == 0)
499 150 s->first_slice_line = 1;
500 } else {
501 742 s->first_slice_line = 1;
502 742 s->resync_mb_x = s->mb_x;
503 }
504 892 start_mb_x = s->mb_x;
505 892 s->resync_mb_y = s->mb_y;
506
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892 if (s->h263_aic) {
507 67 s->y_dc_scale_table =
508 67 s->c_dc_scale_table = ff_aic_dc_scale_table;
509 } else {
510 825 s->y_dc_scale_table =
511 825 s->c_dc_scale_table = ff_mpeg1_dc_scale_table;
512 }
513
514
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892 if (s->modified_quant)
515 742 s->chroma_qscale_table = ff_h263_chroma_qscale_table;
516
517 892 ff_set_qscale(s, s->qscale);
518
519 892 s->rv10_first_dc_coded[0] = 0;
520 892 s->rv10_first_dc_coded[1] = 0;
521 892 s->rv10_first_dc_coded[2] = 0;
522 892 s->block_wrap[0] =
523 892 s->block_wrap[1] =
524 892 s->block_wrap[2] =
525 892 s->block_wrap[3] = s->b8_stride;
526 892 s->block_wrap[4] =
527 892 s->block_wrap[5] = s->mb_stride;
528 892 ff_init_block_index(s);
529
530 /* decode each macroblock */
531
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162300 for (s->mb_num_left = mb_count; s->mb_num_left > 0; s->mb_num_left--) {
532 int ret;
533 162300 ff_update_block_index(s);
534 ff_tlog(avctx, "**mb x=%d y=%d\n", s->mb_x, s->mb_y);
535
536 162300 s->mv_dir = MV_DIR_FORWARD;
537 162300 s->mv_type = MV_TYPE_16X16;
538 162300 ret = ff_h263_decode_mb(s, s->block);
539
540 // Repeat the slice end check from ff_h263_decode_mb with our active
541 // bitstream size
542
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162300 if (ret != SLICE_ERROR && active_bits_size >= get_bits_count(&s->gb)) {
543 162300 int v = show_bits(&s->gb, 16);
544
545
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162300 if (get_bits_count(&s->gb) + 16 > active_bits_size)
546 1341 v >>= get_bits_count(&s->gb) + 16 - active_bits_size;
547
548
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162300 if (!v)
549 892 ret = SLICE_END;
550 }
551
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162300 if (ret != SLICE_ERROR && active_bits_size < get_bits_count(&s->gb) &&
552 8 * buf_size2 >= get_bits_count(&s->gb)) {
553 active_bits_size = buf_size2 * 8;
554 av_log(avctx, AV_LOG_DEBUG, "update size from %d to %d\n",
555 8 * buf_size, active_bits_size);
556 ret = SLICE_OK;
557 }
558
559
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162300 if (ret == SLICE_ERROR || active_bits_size < get_bits_count(&s->gb)) {
560 av_log(s->avctx, AV_LOG_ERROR, "ERROR at MB %d %d\n", s->mb_x,
561 s->mb_y);
562 return AVERROR_INVALIDDATA;
563 }
564
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162300 if (s->pict_type != AV_PICTURE_TYPE_B)
565 140700 ff_h263_update_motion_val(s);
566 162300 ff_mpv_reconstruct_mb(s, s->block);
567
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162300 if (s->loop_filter)
568 59400 ff_h263_loop_filter(s);
569
570
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162300 if (++s->mb_x == s->mb_width) {
571 7575 s->mb_x = 0;
572 7575 s->mb_y++;
573 7575 ff_init_block_index(s);
574 }
575
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162300 if (s->mb_x == s->resync_mb_x)
576 7297 s->first_slice_line = 0;
577
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162300 if (ret == SLICE_END)
578 892 break;
579 }
580
581 892 ff_er_add_slice(&s->er, start_mb_x, s->resync_mb_y, s->mb_x - 1, s->mb_y,
582 ER_MB_END);
583
584 892 return active_bits_size;
585 }
586
587 1667 static int get_slice_offset(AVCodecContext *avctx, const uint8_t *buf, int n)
588 {
589
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1667 if (avctx->slice_count)
590 return avctx->slice_offset[n];
591 else
592 1667 return AV_RL32(buf + n * 8);
593 }
594
595 449 static int rv10_decode_frame(AVCodecContext *avctx, void *data, int *got_frame,
596 AVPacket *avpkt)
597 {
598 449 const uint8_t *buf = avpkt->data;
599 449 int buf_size = avpkt->size;
600 449 MpegEncContext *s = avctx->priv_data;
601 449 AVFrame *pict = data;
602 int i, ret;
603 int slice_count;
604 449 const uint8_t *slices_hdr = NULL;
605
606 ff_dlog(avctx, "*****frame %d size=%d\n", avctx->frame_number, buf_size);
607
608 /* no supplementary picture */
609
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449 if (buf_size == 0) {
610 4 return 0;
611 }
612
613
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445 if (!avctx->slice_count) {
614 445 slice_count = (*buf++) + 1;
615 445 buf_size--;
616
617
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445 if (!slice_count || buf_size <= 8 * slice_count) {
618 av_log(avctx, AV_LOG_ERROR, "Invalid slice count: %d.\n",
619 slice_count);
620 return AVERROR_INVALIDDATA;
621 }
622
623 445 slices_hdr = buf + 4;
624 445 buf += 8 * slice_count;
625 445 buf_size -= 8 * slice_count;
626 } else
627 slice_count = avctx->slice_count;
628
629
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1337 for (i = 0; i < slice_count; i++) {
630 892 unsigned offset = get_slice_offset(avctx, slices_hdr, i);
631 int size, size2;
632
633
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892 if (offset >= buf_size)
634 return AVERROR_INVALIDDATA;
635
636
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892 if (i + 1 == slice_count)
637 445 size = buf_size - offset;
638 else
639 447 size = get_slice_offset(avctx, slices_hdr, i + 1) - offset;
640
641
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892 if (i + 2 >= slice_count)
642 564 size2 = buf_size - offset;
643 else
644 328 size2 = get_slice_offset(avctx, slices_hdr, i + 2) - offset;
645
646
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892 if (size <= 0 || size2 <= 0 ||
647
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892 offset + FFMAX(size, size2) > buf_size)
648 return AVERROR_INVALIDDATA;
649
650
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892 if ((ret = rv10_decode_packet(avctx, buf + offset, size, size2, buf_size)) < 0)
651 return ret;
652
653
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892 if (ret > 8 * size)
654 i++;
655 }
656
657
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445 if (s->current_picture_ptr && s->mb_y >= s->mb_height) {
658 445 ff_er_frame_end(&s->er);
659 445 ff_mpv_frame_end(s);
660
661
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445 if (s->pict_type == AV_PICTURE_TYPE_B || s->low_delay) {
662
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372 if ((ret = av_frame_ref(pict, s->current_picture_ptr->f)) < 0)
663 return ret;
664 372 ff_print_debug_info(s, s->current_picture_ptr, pict);
665 372 ff_mpv_export_qp_table(s, pict, s->current_picture_ptr, FF_QSCALE_TYPE_MPEG1);
666
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73 } else if (s->last_picture_ptr) {
667
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72 if ((ret = av_frame_ref(pict, s->last_picture_ptr->f)) < 0)
668 return ret;
669 72 ff_print_debug_info(s, s->last_picture_ptr, pict);
670 72 ff_mpv_export_qp_table(s, pict,s->last_picture_ptr, FF_QSCALE_TYPE_MPEG1);
671 }
672
673
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445 if (s->last_picture_ptr || s->low_delay) {
674 444 *got_frame = 1;
675 }
676
677 // so we can detect if frame_end was not called (find some nicer solution...)
678 445 s->current_picture_ptr = NULL;
679 }
680
681 445 return avpkt->size;
682 }
683
684 const AVCodec ff_rv10_decoder = {
685 .name = "rv10",
686 .long_name = NULL_IF_CONFIG_SMALL("RealVideo 1.0"),
687 .type = AVMEDIA_TYPE_VIDEO,
688 .id = AV_CODEC_ID_RV10,
689 .priv_data_size = sizeof(RVDecContext),
690 .init = rv10_decode_init,
691 .close = rv10_decode_end,
692 .decode = rv10_decode_frame,
693 .capabilities = AV_CODEC_CAP_DR1,
694 .max_lowres = 3,
695 .pix_fmts = (const enum AVPixelFormat[]) {
696 AV_PIX_FMT_YUV420P,
697 AV_PIX_FMT_NONE
698 },
699 };
700
701 const AVCodec ff_rv20_decoder = {
702 .name = "rv20",
703 .long_name = NULL_IF_CONFIG_SMALL("RealVideo 2.0"),
704 .type = AVMEDIA_TYPE_VIDEO,
705 .id = AV_CODEC_ID_RV20,
706 .priv_data_size = sizeof(RVDecContext),
707 .init = rv10_decode_init,
708 .close = rv10_decode_end,
709 .decode = rv10_decode_frame,
710 .capabilities = AV_CODEC_CAP_DR1 | AV_CODEC_CAP_DELAY,
711 .flush = ff_mpeg_flush,
712 .max_lowres = 3,
713 .pix_fmts = (const enum AVPixelFormat[]) {
714 AV_PIX_FMT_YUV420P,
715 AV_PIX_FMT_NONE
716 },
717 };
718