FFmpeg coverage

Directory: ../../../ffmpeg/
File: src/libavcodec/h263dec.c
Date: 2024-04-19 07:31:02
Exec Total Coverage
Lines: 260 377 69.0%
Functions: 6 6 100.0%
Branches: 202 366 55.2%
Line Branch Exec Source
1 /*
2 * H.263 decoder
3 * Copyright (c) 2001 Fabrice Bellard
4 * Copyright (c) 2002-2004 Michael Niedermayer <michaelni@gmx.at>
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 * H.263 decoder.
26 */
27
28 #define UNCHECKED_BITSTREAM_READER 1
29
30 #include "config_components.h"
31
32 #include "avcodec.h"
33 #include "codec_internal.h"
34 #include "decode.h"
35 #include "error_resilience.h"
36 #include "flvdec.h"
37 #include "h263.h"
38 #include "h263dec.h"
39 #include "hwaccel_internal.h"
40 #include "hwconfig.h"
41 #include "mpeg_er.h"
42 #include "mpeg4video.h"
43 #include "mpeg4videodec.h"
44 #include "mpeg4videodefs.h"
45 #include "mpegvideo.h"
46 #include "mpegvideodec.h"
47 #include "msmpeg4dec.h"
48 #include "thread.h"
49 #include "wmv2dec.h"
50
51 static const enum AVPixelFormat h263_hwaccel_pixfmt_list_420[] = {
52 #if CONFIG_H263_VAAPI_HWACCEL || CONFIG_MPEG4_VAAPI_HWACCEL
53 AV_PIX_FMT_VAAPI,
54 #endif
55 #if CONFIG_MPEG4_NVDEC_HWACCEL
56 AV_PIX_FMT_CUDA,
57 #endif
58 #if CONFIG_MPEG4_VDPAU_HWACCEL
59 AV_PIX_FMT_VDPAU,
60 #endif
61 #if CONFIG_H263_VIDEOTOOLBOX_HWACCEL || CONFIG_MPEG4_VIDEOTOOLBOX_HWACCEL
62 AV_PIX_FMT_VIDEOTOOLBOX,
63 #endif
64 AV_PIX_FMT_YUV420P,
65 AV_PIX_FMT_NONE
66 };
67
68 296 static enum AVPixelFormat h263_get_format(AVCodecContext *avctx)
69 {
70 /* MPEG-4 Studio Profile only, not supported by hardware */
71
2/2
✓ Branch 0 taken 2 times.
✓ Branch 1 taken 294 times.
 296 if (avctx->bits_per_raw_sample > 8) {
72 av_assert1(((MpegEncContext *)avctx->priv_data)->studio_profile);
73 2 return avctx->pix_fmt;
74 }
75
76 if (CONFIG_GRAY && (avctx->flags & AV_CODEC_FLAG_GRAY)) {
77 if (avctx->color_range == AVCOL_RANGE_UNSPECIFIED)
78 avctx->color_range = AVCOL_RANGE_MPEG;
79 return AV_PIX_FMT_GRAY8;
80 }
81
82
2/2
✓ Branch 0 taken 274 times.
✓ Branch 1 taken 20 times.
 294 if (avctx->codec_id == AV_CODEC_ID_H263 ||
83
1/2
✓ Branch 0 taken 274 times.
✗ Branch 1 not taken.
 274 avctx->codec_id == AV_CODEC_ID_H263P ||
84
2/2
✓ Branch 0 taken 197 times.
✓ Branch 1 taken 77 times.
 274 avctx->codec_id == AV_CODEC_ID_MPEG4)
85 217 return avctx->pix_fmt = ff_get_format(avctx, h263_hwaccel_pixfmt_list_420);
86
87 77 return AV_PIX_FMT_YUV420P;
88 }
89
90 264 av_cold int ff_h263_decode_init(AVCodecContext *avctx)
91 {
92 264 MpegEncContext *s = avctx->priv_data;
93 int ret;
94
95 264 s->out_format = FMT_H263;
96
97 // set defaults
98 264 ff_mpv_decode_init(s, avctx);
99
100 264 s->quant_precision = 5;
101 264 s->decode_mb = ff_h263_decode_mb;
102 264 s->low_delay = 1;
103
104 /* select sub codec */
105
8/10
✓ Branch 0 taken 20 times.
✓ Branch 1 taken 179 times.
✓ Branch 2 taken 2 times.
✓ Branch 3 taken 9 times.
✓ Branch 4 taken 13 times.
✓ Branch 5 taken 9 times.
✓ Branch 6 taken 12 times.
✗ Branch 7 not taken.
✓ Branch 8 taken 20 times.
✗ Branch 9 not taken.
 264 switch (avctx->codec->id) {
106 20 case AV_CODEC_ID_H263:
107 case AV_CODEC_ID_H263P:
108 20 avctx->chroma_sample_location = AVCHROMA_LOC_CENTER;
109 20 break;
110 179 case AV_CODEC_ID_MPEG4:
111 179 break;
112 2 case AV_CODEC_ID_MSMPEG4V1:
113 2 s->h263_pred = 1;
114 2 s->msmpeg4_version = 1;
115 2 break;
116 9 case AV_CODEC_ID_MSMPEG4V2:
117 9 s->h263_pred = 1;
118 9 s->msmpeg4_version = 2;
119 9 break;
120 13 case AV_CODEC_ID_MSMPEG4V3:
121 13 s->h263_pred = 1;
122 13 s->msmpeg4_version = 3;
123 13 break;
124 9 case AV_CODEC_ID_WMV1:
125 9 s->h263_pred = 1;
126 9 s->msmpeg4_version = 4;
127 9 break;
128 12 case AV_CODEC_ID_WMV2:
129 12 s->h263_pred = 1;
130 12 s->msmpeg4_version = 5;
131 12 break;
132 ✗ case AV_CODEC_ID_H263I:
133 ✗ break;
134 20 case AV_CODEC_ID_FLV1:
135 20 s->h263_flv = 1;
136 20 break;
137 ✗ default:
138 ✗ av_log(avctx, AV_LOG_ERROR, "Unsupported codec %d\n",
139 ✗ avctx->codec->id);
140 ✗ return AVERROR(ENOSYS);
141 }
142
143
2/4
✓ Branch 0 taken 264 times.
✗ Branch 1 not taken.
✗ Branch 2 not taken.
✓ Branch 3 taken 264 times.
 264 if (avctx->codec_tag == AV_RL32("L263") || avctx->codec_tag == AV_RL32("S263"))
144 ✗ if (avctx->extradata_size == 56 && avctx->extradata[0] == 1)
145 ✗ s->ehc_mode = 1;
146
147 /* for H.263, we allocate the images after having read the header */
148
2/2
✓ Branch 0 taken 244 times.
✓ Branch 1 taken 20 times.
 264 if (avctx->codec->id != AV_CODEC_ID_H263 &&
149
1/2
✓ Branch 0 taken 244 times.
✗ Branch 1 not taken.
 244 avctx->codec->id != AV_CODEC_ID_H263P &&
150
2/2
✓ Branch 0 taken 65 times.
✓ Branch 1 taken 179 times.
 244 avctx->codec->id != AV_CODEC_ID_MPEG4) {
151 65 avctx->pix_fmt = h263_get_format(avctx);
152
1/2
✗ Branch 1 not taken.
✓ Branch 2 taken 65 times.
 65 if ((ret = ff_mpv_common_init(s)) < 0)
153 ✗ return ret;
154 }
155
156 264 ff_h263dsp_init(&s->h263dsp);
157 264 ff_h263_decode_init_vlc();
158
159 264 return 0;
160 }
161
162 264 av_cold int ff_h263_decode_end(AVCodecContext *avctx)
163 {
164 264 MpegEncContext *s = avctx->priv_data;
165
166 264 ff_mpv_common_end(s);
167 264 return 0;
168 }
169
170 /**
171 * Return the number of bytes consumed for building the current frame.
172 */
173 5634 static int get_consumed_bytes(MpegEncContext *s, int buf_size)
174 {
175 5634 int pos = (get_bits_count(&s->gb) + 7) >> 3;
176
177
3/4
✓ Branch 0 taken 5617 times.
✓ Branch 1 taken 17 times.
✗ Branch 2 not taken.
✓ Branch 3 taken 5617 times.
 5634 if (s->divx_packed || s->avctx->hwaccel) {
178 /* We would have to scan through the whole buf to handle the weird
179 * reordering ... */
180 17 return buf_size;
181 } else {
182 // avoid infinite loops (maybe not needed...)
183
1/2
✗ Branch 0 not taken.
✓ Branch 1 taken 5617 times.
 5617 if (pos == 0)
184 ✗ pos = 1;
185 // oops ;)
186
2/2
✓ Branch 0 taken 5452 times.
✓ Branch 1 taken 165 times.
 5617 if (pos + 10 > buf_size)
187 5452 pos = buf_size;
188
189 5617 return pos;
190 }
191 }
192
193 11944 static int decode_slice(MpegEncContext *s)
194 {
195 23888 const int part_mask = s->partitioned_frame
196
2/2
✓ Branch 0 taken 1728 times.
✓ Branch 1 taken 10216 times.
 11944 ? (ER_AC_END | ER_AC_ERROR) : 0x7F;
197 11944 const int mb_size = 16 >> s->avctx->lowres;
198 int ret;
199
200 11944 s->last_resync_gb = s->gb;
201 11944 s->first_slice_line = 1;
202 11944 s->resync_mb_x = s->mb_x;
203 11944 s->resync_mb_y = s->mb_y;
204
205 11944 ff_set_qscale(s, s->qscale);
206
207
2/2
✓ Branch 0 taken 30 times.
✓ Branch 1 taken 11914 times.
 11944 if (s->studio_profile) {
208
1/2
✗ Branch 1 not taken.
✓ Branch 2 taken 30 times.
 30 if ((ret = ff_mpeg4_decode_studio_slice_header(s->avctx->priv_data)) < 0)
209 ✗ return ret;
210 }
211
212
1/2
✗ Branch 0 not taken.
✓ Branch 1 taken 11944 times.
 11944 if (s->avctx->hwaccel) {
213 ✗ const uint8_t *start = s->gb.buffer + get_bits_count(&s->gb) / 8;
214 ✗ ret = FF_HW_CALL(s->avctx, decode_slice, start, s->gb.buffer_end - start);
215 // ensure we exit decode loop
216 ✗ s->mb_y = s->mb_height;
217 ✗ return ret;
218 }
219
220
2/2
✓ Branch 0 taken 1728 times.
✓ Branch 1 taken 10216 times.
 11944 if (s->partitioned_frame) {
221 1728 const int qscale = s->qscale;
222
223
1/2
✓ Branch 0 taken 1728 times.
✗ Branch 1 not taken.
 1728 if (CONFIG_MPEG4_DECODER && s->codec_id == AV_CODEC_ID_MPEG4)
224
1/2
✗ Branch 1 not taken.
✓ Branch 2 taken 1728 times.
 1728 if ((ret = ff_mpeg4_decode_partitions(s->avctx->priv_data)) < 0)
225 ✗ return ret;
226
227 /* restore variables which were modified */
228 1728 s->first_slice_line = 1;
229 1728 s->mb_x = s->resync_mb_x;
230 1728 s->mb_y = s->resync_mb_y;
231 1728 ff_set_qscale(s, qscale);
232 }
233
234
2/2
✓ Branch 0 taken 93735 times.
✓ Branch 1 taken 1346 times.
 95081 for (; s->mb_y < s->mb_height; s->mb_y++) {
235 /* per-row end of slice checks */
236
2/2
✓ Branch 0 taken 19665 times.
✓ Branch 1 taken 74070 times.
 93735 if (s->msmpeg4_version) {
237
1/2
✗ Branch 0 not taken.
✓ Branch 1 taken 19665 times.
 19665 if (s->resync_mb_y + s->slice_height == s->mb_y) {
238 ✗ ff_er_add_slice(&s->er, s->resync_mb_x, s->resync_mb_y,
239 ✗ s->mb_x - 1, s->mb_y, ER_MB_END);
240
241 ✗ return 0;
242 }
243 }
244
245
2/2
✓ Branch 0 taken 750 times.
✓ Branch 1 taken 92985 times.
 93735 if (s->msmpeg4_version == 1) {
246 750 s->last_dc[0] =
247 750 s->last_dc[1] =
248 750 s->last_dc[2] = 128;
249 }
250
251 93735 ff_init_block_index(s);
252
2/2
✓ Branch 0 taken 2191508 times.
✓ Branch 1 taken 83137 times.
 2274645 for (; s->mb_x < s->mb_width; s->mb_x++) {
253 int ret;
254
255 2191508 ff_update_block_index(s, s->avctx->bits_per_raw_sample,
256 2191508 s->avctx->lowres, s->chroma_x_shift);
257
258
4/4
✓ Branch 0 taken 92918 times.
✓ Branch 1 taken 2098590 times.
✓ Branch 2 taken 7345 times.
✓ Branch 3 taken 85573 times.
 2191508 if (s->resync_mb_x == s->mb_x && s->resync_mb_y + 1 == s->mb_y)
259 7345 s->first_slice_line = 0;
260
261 /* DCT & quantize */
262
263 2191508 s->mv_dir = MV_DIR_FORWARD;
264 2191508 s->mv_type = MV_TYPE_16X16;
265 ff_dlog(s, "%d %06X\n",
266 get_bits_count(&s->gb), show_bits(&s->gb, 24));
267
268 ff_tlog(NULL, "Decoding MB at %dx%d\n", s->mb_x, s->mb_y);
269 2191508 ret = s->decode_mb(s, s->block);
270
271
2/2
✓ Branch 0 taken 1944784 times.
✓ Branch 1 taken 246724 times.
 2191508 if (s->pict_type != AV_PICTURE_TYPE_B)
272 1944784 ff_h263_update_motion_val(s);
273
274
2/2
✓ Branch 0 taken 10598 times.
✓ Branch 1 taken 2180910 times.
 2191508 if (ret < 0) {
275 10598 const int xy = s->mb_x + s->mb_y * s->mb_stride;
276
1/2
✓ Branch 0 taken 10598 times.
✗ Branch 1 not taken.
 10598 if (ret == SLICE_END) {
277 10598 ff_mpv_reconstruct_mb(s, s->block);
278
1/2
✗ Branch 0 not taken.
✓ Branch 1 taken 10598 times.
 10598 if (s->loop_filter)
279 ✗ ff_h263_loop_filter(s);
280
281 10598 ff_er_add_slice(&s->er, s->resync_mb_x, s->resync_mb_y,
282 s->mb_x, s->mb_y, ER_MB_END & part_mask);
283
284 10598 s->padding_bug_score--;
285
286
2/2
✓ Branch 0 taken 7645 times.
✓ Branch 1 taken 2953 times.
 10598 if (++s->mb_x >= s->mb_width) {
287 7645 s->mb_x = 0;
288 7645 ff_mpeg_draw_horiz_band(s, s->mb_y * mb_size, mb_size);
289 7645 ff_mpv_report_decode_progress(s);
290 7645 s->mb_y++;
291 }
292 10598 return 0;
293 ✗ } else if (ret == SLICE_NOEND) {
294 ✗ av_log(s->avctx, AV_LOG_ERROR,
295 "Slice mismatch at MB: %d\n", xy);
296 ✗ ff_er_add_slice(&s->er, s->resync_mb_x, s->resync_mb_y,
297 ✗ s->mb_x + 1, s->mb_y,
298 ER_MB_END & part_mask);
299 ✗ return AVERROR_INVALIDDATA;
300 }
301 ✗ av_log(s->avctx, AV_LOG_ERROR, "Error at MB: %d\n", xy);
302 ✗ ff_er_add_slice(&s->er, s->resync_mb_x, s->resync_mb_y,
303 s->mb_x, s->mb_y, ER_MB_ERROR & part_mask);
304
305 ✗ if ((s->avctx->err_recognition & AV_EF_IGNORE_ERR) && get_bits_left(&s->gb) > 0)
306 ✗ continue;
307 ✗ return AVERROR_INVALIDDATA;
308 }
309
310 2180910 ff_mpv_reconstruct_mb(s, s->block);
311
2/2
✓ Branch 0 taken 141300 times.
✓ Branch 1 taken 2039610 times.
 2180910 if (s->loop_filter)
312 141300 ff_h263_loop_filter(s);
313 }
314
315 83137 ff_mpeg_draw_horiz_band(s, s->mb_y * mb_size, mb_size);
316 83137 ff_mpv_report_decode_progress(s);
317
318 83137 s->mb_x = 0;
319 }
320
321 av_assert1(s->mb_x == 0 && s->mb_y == s->mb_height);
322
323 // Detect incorrect padding with wrong stuffing codes used by NEC N-02B
324
1/2
✗ Branch 0 not taken.
✓ Branch 1 taken 1346 times.
 1346 if (s->codec_id == AV_CODEC_ID_MPEG4 &&
325 ✗ (s->workaround_bugs & FF_BUG_AUTODETECT) &&
326 ✗ get_bits_left(&s->gb) >= 48 &&
327 ✗ show_bits(&s->gb, 24) == 0x4010 &&
328 ✗ !s->data_partitioning)
329 ✗ s->padding_bug_score += 32;
330
331 /* try to detect the padding bug */
332
1/2
✗ Branch 0 not taken.
✓ Branch 1 taken 1346 times.
 1346 if (s->codec_id == AV_CODEC_ID_MPEG4 &&
333 ✗ (s->workaround_bugs & FF_BUG_AUTODETECT) &&
334 ✗ get_bits_left(&s->gb) >= 0 &&
335 ✗ get_bits_left(&s->gb) < 137 &&
336 ✗ !s->data_partitioning) {
337 ✗ const int bits_count = get_bits_count(&s->gb);
338 ✗ const int bits_left = s->gb.size_in_bits - bits_count;
339
340 ✗ if (bits_left == 0) {
341 ✗ s->padding_bug_score += 16;
342 ✗ } else if (bits_left != 1) {
343 ✗ int v = show_bits(&s->gb, 8);
344 ✗ v |= 0x7F >> (7 - (bits_count & 7));
345
346 ✗ if (v == 0x7F && bits_left <= 8)
347 ✗ s->padding_bug_score--;
348 ✗ else if (v == 0x7F && ((get_bits_count(&s->gb) + 8) & 8) &&
349 bits_left <= 16)
350 ✗ s->padding_bug_score += 4;
351 else
352 ✗ s->padding_bug_score++;
353 }
354 }
355
356
1/2
✗ Branch 0 not taken.
✓ Branch 1 taken 1346 times.
 1346 if (s->codec_id == AV_CODEC_ID_H263 &&
357 ✗ (s->workaround_bugs & FF_BUG_AUTODETECT) &&
358 ✗ get_bits_left(&s->gb) >= 8 &&
359 ✗ get_bits_left(&s->gb) < 300 &&
360 ✗ s->pict_type == AV_PICTURE_TYPE_I &&
361 ✗ show_bits(&s->gb, 8) == 0 &&
362 ✗ !s->data_partitioning) {
363
364 ✗ s->padding_bug_score += 32;
365 }
366
367
1/2
✗ Branch 0 not taken.
✓ Branch 1 taken 1346 times.
 1346 if (s->codec_id == AV_CODEC_ID_H263 &&
368 ✗ (s->workaround_bugs & FF_BUG_AUTODETECT) &&
369 ✗ get_bits_left(&s->gb) >= 64 &&
370 ✗ AV_RB64(s->gb.buffer_end - 8) == 0xCDCDCDCDFC7F0000) {
371
372 ✗ s->padding_bug_score += 32;
373 }
374
375
1/2
✓ Branch 0 taken 1346 times.
✗ Branch 1 not taken.
 1346 if (s->workaround_bugs & FF_BUG_AUTODETECT) {
376 1346 if (
377
2/4
✓ Branch 0 taken 1346 times.
✗ Branch 1 not taken.
✓ Branch 2 taken 1346 times.
✗ Branch 3 not taken.
 1346 (s->padding_bug_score > -2 && !s->data_partitioning))
378 1346 s->workaround_bugs |= FF_BUG_NO_PADDING;
379 else
380 ✗ s->workaround_bugs &= ~FF_BUG_NO_PADDING;
381 }
382
383 // handle formats which don't have unique end markers
384
1/4
✗ Branch 0 not taken.
✓ Branch 1 taken 1346 times.
✗ Branch 2 not taken.
✗ Branch 3 not taken.
 1346 if (s->msmpeg4_version || (s->workaround_bugs & FF_BUG_NO_PADDING)) { // FIXME perhaps solve this more cleanly
385 1346 int left = get_bits_left(&s->gb);
386 1346 int max_extra = 7;
387
388 /* no markers in M$ crap */
389
3/4
✓ Branch 0 taken 1346 times.
✗ Branch 1 not taken.
✓ Branch 2 taken 90 times.
✓ Branch 3 taken 1256 times.
 1346 if (s->msmpeg4_version && s->pict_type == AV_PICTURE_TYPE_I)
390 90 max_extra += 17;
391
392 /* buggy padding but the frame should still end approximately at
393 * the bitstream end */
394
1/2
✓ Branch 0 taken 1346 times.
✗ Branch 1 not taken.
 1346 if ((s->workaround_bugs & FF_BUG_NO_PADDING) &&
395
1/2
✗ Branch 0 not taken.
✓ Branch 1 taken 1346 times.
 1346 (s->avctx->err_recognition & (AV_EF_BUFFER|AV_EF_AGGRESSIVE)))
396 ✗ max_extra += 48;
397
1/2
✓ Branch 0 taken 1346 times.
✗ Branch 1 not taken.
 1346 else if ((s->workaround_bugs & FF_BUG_NO_PADDING))
398 1346 max_extra += 256 * 256 * 256 * 64;
399
400
1/2
✗ Branch 0 not taken.
✓ Branch 1 taken 1346 times.
 1346 if (left > max_extra)
401 ✗ av_log(s->avctx, AV_LOG_ERROR,
402 "discarding %d junk bits at end, next would be %X\n",
403 left, show_bits(&s->gb, 24));
404
1/2
✗ Branch 0 not taken.
✓ Branch 1 taken 1346 times.
 1346 else if (left < 0)
405 ✗ av_log(s->avctx, AV_LOG_ERROR, "overreading %d bits\n", -left);
406 else
407 1346 ff_er_add_slice(&s->er, s->resync_mb_x, s->resync_mb_y,
408 1346 s->mb_x - 1, s->mb_y, ER_MB_END);
409
410 1346 return 0;
411 }
412
413 ✗ av_log(s->avctx, AV_LOG_ERROR,
414 "slice end not reached but screenspace end (%d left %06X, score= %d)\n",
415 get_bits_left(&s->gb), show_bits(&s->gb, 24), s->padding_bug_score);
416
417 ✗ ff_er_add_slice(&s->er, s->resync_mb_x, s->resync_mb_y, s->mb_x, s->mb_y,
418 ER_MB_END & part_mask);
419
420 ✗ return AVERROR_INVALIDDATA;
421 }
422
423 5742 int ff_h263_decode_frame(AVCodecContext *avctx, AVFrame *pict,
424 int *got_frame, AVPacket *avpkt)
425 {
426 5742 const uint8_t *buf = avpkt->data;
427 5742 int buf_size = avpkt->size;
428 5742 MpegEncContext *s = avctx->priv_data;
429 int ret;
430 5742 int slice_ret = 0;
431
432 /* no supplementary picture */
433
2/2
✓ Branch 0 taken 5634 times.
✓ Branch 1 taken 108 times.
 5742 if (buf_size == 0) {
434 /* special case for last picture */
435
4/4
✓ Branch 0 taken 46 times.
✓ Branch 1 taken 62 times.
✓ Branch 2 taken 23 times.
✓ Branch 3 taken 23 times.
 108 if (s->low_delay == 0 && s->next_picture_ptr) {
436
1/2
✗ Branch 1 not taken.
✓ Branch 2 taken 23 times.
 23 if ((ret = av_frame_ref(pict, s->next_picture_ptr->f)) < 0)
437 ✗ return ret;
438 23 s->next_picture_ptr = NULL;
439
440 23 *got_frame = 1;
441
1/4
✗ Branch 0 not taken.
✓ Branch 1 taken 85 times.
✗ Branch 2 not taken.
✗ Branch 3 not taken.
 85 } else if (s->skipped_last_frame && s->current_picture_ptr) {
442 /* Output the last picture we decoded again if the stream ended with
443 * an NVOP */
444 ✗ if ((ret = av_frame_ref(pict, s->current_picture_ptr->f)) < 0)
445 ✗ return ret;
446 /* Copy props from the last input packet. Otherwise, props from the last
447 * returned picture would be reused */
448 ✗ if ((ret = ff_decode_frame_props(avctx, pict)) < 0)
449 ✗ return ret;
450 ✗ s->current_picture_ptr = NULL;
451
452 ✗ *got_frame = 1;
453 }
454
455 108 return 0;
456 }
457
458 5634 retry:
459
4/4
✓ Branch 0 taken 18 times.
✓ Branch 1 taken 5620 times.
✓ Branch 2 taken 7 times.
✓ Branch 3 taken 11 times.
 5638 if (s->divx_packed && s->bitstream_buffer_size) {
460 int i;
461
1/2
✓ Branch 0 taken 7 times.
✗ Branch 1 not taken.
 7 for(i=0; i < buf_size-3; i++) {
462
3/6
✓ Branch 0 taken 7 times.
✗ Branch 1 not taken.
✓ Branch 2 taken 7 times.
✗ Branch 3 not taken.
✓ Branch 4 taken 7 times.
✗ Branch 5 not taken.
 7 if (buf[i]==0 && buf[i+1]==0 && buf[i+2]==1) {
463
1/2
✗ Branch 0 not taken.
✓ Branch 1 taken 7 times.
 7 if (buf[i+3]==0xB0) {
464 ✗ av_log(s->avctx, AV_LOG_WARNING, "Discarding excessive bitstream in packed xvid\n");
465 ✗ s->bitstream_buffer_size = 0;
466 }
467 7 break;
468 }
469 }
470 }
471
472
3/6
✓ Branch 0 taken 7 times.
✓ Branch 1 taken 5631 times.
✗ Branch 2 not taken.
✓ Branch 3 taken 7 times.
✗ Branch 4 not taken.
✗ Branch 5 not taken.
 5638 if (s->bitstream_buffer_size && (s->divx_packed || buf_size <= MAX_NVOP_SIZE)) // divx 5.01+/xvid frame reorder
473 7 ret = init_get_bits8(&s->gb, s->bitstream_buffer,
474 s->bitstream_buffer_size);
475 else
476 5631 ret = init_get_bits8(&s->gb, buf, buf_size);
477
478 5638 s->bitstream_buffer_size = 0;
479
1/2
✗ Branch 0 not taken.
✓ Branch 1 taken 5638 times.
 5638 if (ret < 0)
480 ✗ return ret;
481
482 /* let's go :-) */
483
2/2
✓ Branch 0 taken 674 times.
✓ Branch 1 taken 4964 times.
 5638 if (CONFIG_WMV2_DECODER && s->msmpeg4_version == 5) {
484 674 ret = ff_wmv2_decode_picture_header(s);
485
2/2
✓ Branch 0 taken 675 times.
✓ Branch 1 taken 4289 times.
 4964 } else if (CONFIG_MSMPEG4DEC && s->msmpeg4_version) {
486 675 ret = ff_msmpeg4_decode_picture_header(s);
487
2/2
✓ Branch 0 taken 3513 times.
✓ Branch 1 taken 776 times.
 4289 } else if (CONFIG_MPEG4_DECODER && avctx->codec_id == AV_CODEC_ID_MPEG4) {
488 3513 ret = ff_mpeg4_decode_picture_header(avctx->priv_data, &s->gb, 0, 0);
489 3513 s->skipped_last_frame = (ret == FRAME_SKIPPED);
490
1/2
✗ Branch 0 not taken.
✓ Branch 1 taken 776 times.
 776 } else if (CONFIG_H263I_DECODER && s->codec_id == AV_CODEC_ID_H263I) {
491 ✗ ret = ff_intel_h263_decode_picture_header(s);
492
2/2
✓ Branch 0 taken 315 times.
✓ Branch 1 taken 461 times.
 776 } else if (CONFIG_FLV_DECODER && s->h263_flv) {
493 315 ret = ff_flv_decode_picture_header(s);
494 } else {
495 461 ret = ff_h263_decode_picture_header(s);
496 }
497
498
2/4
✓ Branch 0 taken 5638 times.
✗ Branch 1 not taken.
✗ Branch 2 not taken.
✓ Branch 3 taken 5638 times.
 5638 if (ret < 0 || ret == FRAME_SKIPPED) {
499 ✗ if ( s->width != avctx->coded_width
500 ✗ || s->height != avctx->coded_height) {
501 ✗ av_log(s->avctx, AV_LOG_WARNING, "Reverting picture dimensions change due to header decoding failure\n");
502 ✗ s->width = avctx->coded_width;
503 ✗ s->height= avctx->coded_height;
504 }
505 }
506
1/2
✗ Branch 0 not taken.
✓ Branch 1 taken 5638 times.
 5638 if (ret == FRAME_SKIPPED)
507 ✗ return get_consumed_bytes(s, buf_size);
508
509 /* skip if the header was thrashed */
510
1/2
✗ Branch 0 not taken.
✓ Branch 1 taken 5638 times.
 5638 if (ret < 0) {
511 ✗ av_log(s->avctx, AV_LOG_ERROR, "header damaged\n");
512 ✗ return ret;
513 }
514
515
2/2
✓ Branch 0 taken 189 times.
✓ Branch 1 taken 5449 times.
 5638 if (!s->context_initialized) {
516 189 avctx->pix_fmt = h263_get_format(avctx);
517
1/2
✗ Branch 1 not taken.
✓ Branch 2 taken 189 times.
 189 if ((ret = ff_mpv_common_init(s)) < 0)
518 ✗ return ret;
519 }
520
521 5638 avctx->has_b_frames = !s->low_delay;
522
523
2/2
✓ Branch 0 taken 3513 times.
✓ Branch 1 taken 2125 times.
 5638 if (CONFIG_MPEG4_DECODER && avctx->codec_id == AV_CODEC_ID_MPEG4) {
524
3/4
✓ Branch 0 taken 2814 times.
✓ Branch 1 taken 699 times.
✗ Branch 3 not taken.
✓ Branch 4 taken 2814 times.
 3513 if (s->pict_type != AV_PICTURE_TYPE_B && s->mb_num/2 > get_bits_left(&s->gb))
525 ✗ return AVERROR_INVALIDDATA;
526
2/2
✓ Branch 1 taken 4 times.
✓ Branch 2 taken 3509 times.
 3513 if (ff_mpeg4_workaround_bugs(avctx) == 1)
527 4 goto retry;
528
2/2
✓ Branch 0 taken 1 times.
✓ Branch 1 taken 3508 times.
 3509 if (s->studio_profile != (s->idsp.idct == NULL))
529 1 ff_mpv_idct_init(s);
530 }
531
532 /* After H.263 & MPEG-4 header decode we have the height, width,
533 * and other parameters. So then we could init the picture.
534 * FIXME: By the way H.263 decoder is evolving it should have
535 * an H263EncContext */
536
2/2
✓ Branch 0 taken 5593 times.
✓ Branch 1 taken 41 times.
 5634 if (s->width != avctx->coded_width ||
537
1/2
✓ Branch 0 taken 5593 times.
✗ Branch 1 not taken.
 5593 s->height != avctx->coded_height ||
538
2/2
✓ Branch 0 taken 1 times.
✓ Branch 1 taken 5592 times.
 5593 s->context_reinit) {
539 /* H.263 could change picture size any time */
540 42 s->context_reinit = 0;
541
542 42 ret = ff_set_dimensions(avctx, s->width, s->height);
543
1/2
✗ Branch 0 not taken.
✓ Branch 1 taken 42 times.
 42 if (ret < 0)
544 ✗ return ret;
545
546 42 ff_set_sar(avctx, avctx->sample_aspect_ratio);
547
548
1/2
✗ Branch 1 not taken.
✓ Branch 2 taken 42 times.
 42 if ((ret = ff_mpv_common_frame_size_change(s)))
549 ✗ return ret;
550
551
1/2
✗ Branch 1 not taken.
✓ Branch 2 taken 42 times.
 42 if (avctx->pix_fmt != h263_get_format(avctx)) {
552 ✗ av_log(avctx, AV_LOG_ERROR, "format change not supported\n");
553 ✗ avctx->pix_fmt = AV_PIX_FMT_NONE;
554 ✗ return AVERROR_UNKNOWN;
555 }
556 }
557
558
2/2
✓ Branch 0 taken 5173 times.
✓ Branch 1 taken 461 times.
 5634 if (s->codec_id == AV_CODEC_ID_H263 ||
559
1/2
✓ Branch 0 taken 5173 times.
✗ Branch 1 not taken.
 5173 s->codec_id == AV_CODEC_ID_H263P ||
560
1/2
✗ Branch 0 not taken.
✓ Branch 1 taken 5173 times.
 5173 s->codec_id == AV_CODEC_ID_H263I)
561
1/4
✗ Branch 0 not taken.
✓ Branch 1 taken 461 times.
✗ Branch 2 not taken.
✗ Branch 3 not taken.
 461 s->gob_index = H263_GOB_HEIGHT(s->height);
562
563 /* skip B-frames if we don't have reference frames */
564
2/2
✓ Branch 0 taken 365 times.
✓ Branch 1 taken 5269 times.
 5634 if (!s->last_picture_ptr &&
565
2/4
✓ Branch 0 taken 365 times.
✗ Branch 1 not taken.
✗ Branch 2 not taken.
✓ Branch 3 taken 365 times.
 365 (s->pict_type == AV_PICTURE_TYPE_B || s->droppable))
566 ✗ return get_consumed_bytes(s, buf_size);
567
2/2
✓ Branch 0 taken 170 times.
✓ Branch 1 taken 5464 times.
 5634 if ((avctx->skip_frame >= AVDISCARD_NONREF &&
568
1/2
✓ Branch 0 taken 170 times.
✗ Branch 1 not taken.
 170 s->pict_type == AV_PICTURE_TYPE_B) ||
569
2/2
✓ Branch 0 taken 170 times.
✓ Branch 1 taken 5464 times.
 5634 (avctx->skip_frame >= AVDISCARD_NONKEY &&
570
2/2
✓ Branch 0 taken 123 times.
✓ Branch 1 taken 47 times.
 170 s->pict_type != AV_PICTURE_TYPE_I) ||
571
2/2
✓ Branch 0 taken 120 times.
✓ Branch 1 taken 5467 times.
 5587 avctx->skip_frame >= AVDISCARD_ALL)
572 167 return get_consumed_bytes(s, buf_size);
573
574
1/2
✗ Branch 1 not taken.
✓ Branch 2 taken 5467 times.
 5467 if ((ret = ff_mpv_frame_start(s, avctx)) < 0)
575 ✗ return ret;
576
577
3/4
✓ Branch 0 taken 5452 times.
✓ Branch 1 taken 15 times.
✓ Branch 2 taken 5452 times.
✗ Branch 3 not taken.
 5467 if (!s->divx_packed && !avctx->hwaccel)
578 5452 ff_thread_finish_setup(avctx);
579
580
1/2
✗ Branch 0 not taken.
✓ Branch 1 taken 5467 times.
 5467 if (avctx->hwaccel) {
581 ✗ ret = FF_HW_CALL(avctx, start_frame,
582 s->gb.buffer, s->gb.buffer_end - s->gb.buffer);
583 ✗ if (ret < 0 )
584 ✗ return ret;
585 }
586
587 5467 ff_mpeg_er_frame_start(s);
588
589 /* the second part of the wmv2 header contains the MB skip bits which
590 * are stored in current_picture->mb_type which is not available before
591 * ff_mpv_frame_start() */
592
2/2
✓ Branch 0 taken 674 times.
✓ Branch 1 taken 4793 times.
 5467 if (CONFIG_WMV2_DECODER && s->msmpeg4_version == 5) {
593 674 ret = ff_wmv2_decode_secondary_picture_header(s);
594
1/2
✗ Branch 0 not taken.
✓ Branch 1 taken 674 times.
 674 if (ret < 0)
595 ✗ return ret;
596
2/2
✓ Branch 0 taken 3 times.
✓ Branch 1 taken 671 times.
 674 if (ret == 1)
597 3 goto frame_end;
598 }
599
600 /* decode each macroblock */
601 5464 s->mb_x = 0;
602 5464 s->mb_y = 0;
603
604 5464 slice_ret = decode_slice(s);
605
2/2
✓ Branch 0 taken 6480 times.
✓ Branch 1 taken 5464 times.
 11944 while (s->mb_y < s->mb_height) {
606
1/2
✗ Branch 0 not taken.
✓ Branch 1 taken 6480 times.
 6480 if (s->msmpeg4_version) {
607 ✗ if (s->slice_height == 0 || s->mb_x != 0 || slice_ret < 0 ||
608 ✗ (s->mb_y % s->slice_height) != 0 || get_bits_left(&s->gb) < 0)
609 break;
610 } else {
611 6480 int prev_x = s->mb_x, prev_y = s->mb_y;
612
1/2
✗ Branch 1 not taken.
✓ Branch 2 taken 6480 times.
 6480 if (ff_h263_resync(s) < 0)
613 ✗ break;
614
2/2
✓ Branch 0 taken 29 times.
✓ Branch 1 taken 6451 times.
 6480 if (prev_y * s->mb_width + prev_x < s->mb_y * s->mb_width + s->mb_x)
615 29 s->er.error_occurred = 1;
616 }
617
618
3/4
✓ Branch 0 taken 6480 times.
✗ Branch 1 not taken.
✓ Branch 2 taken 3936 times.
✓ Branch 3 taken 2544 times.
 6480 if (s->msmpeg4_version < 4 && s->h263_pred)
619 3936 ff_mpeg4_clean_buffers(s);
620
621
1/2
✗ Branch 1 not taken.
✓ Branch 2 taken 6480 times.
 6480 if (decode_slice(s) < 0)
622 ✗ slice_ret = AVERROR_INVALIDDATA;
623 }
624
625
4/4
✓ Branch 0 taken 4118 times.
✓ Branch 1 taken 1346 times.
✓ Branch 2 taken 871 times.
✓ Branch 3 taken 475 times.
 5464 if (s->msmpeg4_version && s->msmpeg4_version < 4 &&
626
2/2
✓ Branch 0 taken 431 times.
✓ Branch 1 taken 44 times.
 475 s->pict_type == AV_PICTURE_TYPE_I)
627
1/2
✓ Branch 0 taken 44 times.
✗ Branch 1 not taken.
 44 if (!CONFIG_MSMPEG4DEC ||
628 44 ff_msmpeg4_decode_ext_header(s, buf_size) < 0)
629 ✗ s->er.error_status_table[s->mb_num - 1] = ER_MB_ERROR;
630
631 av_assert1(s->bitstream_buffer_size == 0);
632 5464 frame_end:
633
2/2
✓ Branch 0 taken 5466 times.
✓ Branch 1 taken 1 times.
 5467 if (!s->studio_profile)
634 5466 ff_er_frame_end(&s->er, NULL);
635
636
1/2
✗ Branch 0 not taken.
✓ Branch 1 taken 5467 times.
 5467 if (avctx->hwaccel) {
637 ✗ ret = FF_HW_SIMPLE_CALL(avctx, end_frame);
638 ✗ if (ret < 0)
639 ✗ return ret;
640 }
641
642 5467 ff_mpv_frame_end(s);
643
644
2/2
✓ Branch 0 taken 3365 times.
✓ Branch 1 taken 2102 times.
 5467 if (CONFIG_MPEG4_DECODER && avctx->codec_id == AV_CODEC_ID_MPEG4)
645 3365 ff_mpeg4_frame_end(avctx, buf, buf_size);
646
647
3/4
✓ Branch 0 taken 5452 times.
✓ Branch 1 taken 15 times.
✗ Branch 2 not taken.
✓ Branch 3 taken 5452 times.
 5467 if (!s->divx_packed && avctx->hwaccel)
648 ✗ ff_thread_finish_setup(avctx);
649
650 av_assert1(s->current_picture.f->pict_type == s->current_picture_ptr->f->pict_type);
651 av_assert1(s->current_picture.f->pict_type == s->pict_type);
652
4/4
✓ Branch 0 taken 4768 times.
✓ Branch 1 taken 699 times.
✓ Branch 2 taken 4363 times.
✓ Branch 3 taken 405 times.
 5467 if (s->pict_type == AV_PICTURE_TYPE_B || s->low_delay) {
653
1/2
✗ Branch 1 not taken.
✓ Branch 2 taken 5062 times.
 5062 if ((ret = av_frame_ref(pict, s->current_picture_ptr->f)) < 0)
654 ✗ return ret;
655 5062 ff_print_debug_info(s, s->current_picture_ptr, pict);
656 5062 ff_mpv_export_qp_table(s, pict, s->current_picture_ptr, FF_MPV_QSCALE_TYPE_MPEG1);
657
2/2
✓ Branch 0 taken 378 times.
✓ Branch 1 taken 27 times.
 405 } else if (s->last_picture_ptr) {
658
1/2
✗ Branch 1 not taken.
✓ Branch 2 taken 378 times.
 378 if ((ret = av_frame_ref(pict, s->last_picture_ptr->f)) < 0)
659 ✗ return ret;
660 378 ff_print_debug_info(s, s->last_picture_ptr, pict);
661 378 ff_mpv_export_qp_table(s, pict, s->last_picture_ptr, FF_MPV_QSCALE_TYPE_MPEG1);
662 }
663
664
4/4
✓ Branch 0 taken 117 times.
✓ Branch 1 taken 5350 times.
✓ Branch 2 taken 90 times.
✓ Branch 3 taken 27 times.
 5467 if (s->last_picture_ptr || s->low_delay) {
665
2/2
✓ Branch 0 taken 5439 times.
✓ Branch 1 taken 1 times.
 5440 if ( pict->format == AV_PIX_FMT_YUV420P
666
2/4
✓ Branch 0 taken 5439 times.
✗ Branch 1 not taken.
✗ Branch 2 not taken.
✓ Branch 3 taken 5439 times.
 5439 && (s->codec_tag == AV_RL32("GEOV") || s->codec_tag == AV_RL32("GEOX"))) {
667 ✗ for (int p = 0; p < 3; p++) {
668 ✗ int h = AV_CEIL_RSHIFT(pict->height, !!p);
669
670 ✗ pict->data[p] += (h - 1) * pict->linesize[p];
671 ✗ pict->linesize[p] *= -1;
672 }
673 }
674 5440 *got_frame = 1;
675 }
676
677
1/4
✗ Branch 0 not taken.
✓ Branch 1 taken 5467 times.
✗ Branch 2 not taken.
✗ Branch 3 not taken.
 5467 if (slice_ret < 0 && (avctx->err_recognition & AV_EF_EXPLODE))
678 ✗ return slice_ret;
679 else
680 5467 return get_consumed_bytes(s, buf_size);
681 }
682
683 static const AVCodecHWConfigInternal *const h263_hw_config_list[] = {
684 #if CONFIG_H263_VAAPI_HWACCEL
685 HWACCEL_VAAPI(h263),
686 #endif
687 #if CONFIG_MPEG4_NVDEC_HWACCEL
688 HWACCEL_NVDEC(mpeg4),
689 #endif
690 #if CONFIG_MPEG4_VDPAU_HWACCEL
691 HWACCEL_VDPAU(mpeg4),
692 #endif
693 #if CONFIG_H263_VIDEOTOOLBOX_HWACCEL
694 HWACCEL_VIDEOTOOLBOX(h263),
695 #endif
696 NULL
697 };
698
699 const FFCodec ff_h263_decoder = {
700 .p.name = "h263",
701 CODEC_LONG_NAME("H.263 / H.263-1996, H.263+ / H.263-1998 / H.263 version 2"),
702 .p.type = AVMEDIA_TYPE_VIDEO,
703 .p.id = AV_CODEC_ID_H263,
704 .priv_data_size = sizeof(MpegEncContext),
705 .init = ff_h263_decode_init,
706 .close = ff_h263_decode_end,
707 FF_CODEC_DECODE_CB(ff_h263_decode_frame),
708 .p.capabilities = AV_CODEC_CAP_DRAW_HORIZ_BAND | AV_CODEC_CAP_DR1 |
709 AV_CODEC_CAP_DELAY,
710 .caps_internal = FF_CODEC_CAP_SKIP_FRAME_FILL_PARAM,
711 .flush = ff_mpeg_flush,
712 .p.max_lowres = 3,
713 .hw_configs = h263_hw_config_list,
714 };
715
716 const FFCodec ff_h263p_decoder = {
717 .p.name = "h263p",
718 CODEC_LONG_NAME("H.263 / H.263-1996, H.263+ / H.263-1998 / H.263 version 2"),
719 .p.type = AVMEDIA_TYPE_VIDEO,
720 .p.id = AV_CODEC_ID_H263P,
721 .priv_data_size = sizeof(MpegEncContext),
722 .init = ff_h263_decode_init,
723 .close = ff_h263_decode_end,
724 FF_CODEC_DECODE_CB(ff_h263_decode_frame),
725 .p.capabilities = AV_CODEC_CAP_DRAW_HORIZ_BAND | AV_CODEC_CAP_DR1 |
726 AV_CODEC_CAP_DELAY,
727 .caps_internal = FF_CODEC_CAP_SKIP_FRAME_FILL_PARAM,
728 .flush = ff_mpeg_flush,
729 .p.max_lowres = 3,
730 .hw_configs = h263_hw_config_list,
731 };
732