Commit | Line | Data |
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2ba45a60 DM |
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 "libavutil/cpu.h" | |
31 | #include "avcodec.h" | |
32 | #include "error_resilience.h" | |
33 | #include "flv.h" | |
34 | #include "h263.h" | |
35 | #include "h263_parser.h" | |
36 | #include "internal.h" | |
37 | #include "mpeg_er.h" | |
38 | #include "mpeg4video.h" | |
39 | #include "mpeg4video_parser.h" | |
40 | #include "mpegvideo.h" | |
41 | #include "msmpeg4.h" | |
42 | #include "qpeldsp.h" | |
43 | #include "vdpau_internal.h" | |
44 | #include "thread.h" | |
45 | ||
f6fa7814 DM |
46 | static enum AVPixelFormat h263_get_format(AVCodecContext *avctx) |
47 | { | |
48 | if (avctx->codec->id == AV_CODEC_ID_MSS2) | |
49 | return AV_PIX_FMT_YUV420P; | |
50 | ||
51 | return avctx->pix_fmt = ff_get_format(avctx, avctx->codec->pix_fmts); | |
52 | } | |
53 | ||
2ba45a60 DM |
54 | av_cold int ff_h263_decode_init(AVCodecContext *avctx) |
55 | { | |
56 | MpegEncContext *s = avctx->priv_data; | |
57 | int ret; | |
58 | ||
59 | s->out_format = FMT_H263; | |
60 | ||
61 | // set defaults | |
62 | ff_mpv_decode_defaults(s); | |
63 | ff_mpv_decode_init(s, avctx); | |
64 | ||
65 | s->quant_precision = 5; | |
66 | s->decode_mb = ff_h263_decode_mb; | |
67 | s->low_delay = 1; | |
2ba45a60 DM |
68 | s->unrestricted_mv = 1; |
69 | ||
70 | /* select sub codec */ | |
71 | switch (avctx->codec->id) { | |
72 | case AV_CODEC_ID_H263: | |
73 | case AV_CODEC_ID_H263P: | |
74 | s->unrestricted_mv = 0; | |
75 | avctx->chroma_sample_location = AVCHROMA_LOC_CENTER; | |
76 | break; | |
77 | case AV_CODEC_ID_MPEG4: | |
78 | break; | |
79 | case AV_CODEC_ID_MSMPEG4V1: | |
80 | s->h263_pred = 1; | |
81 | s->msmpeg4_version = 1; | |
82 | break; | |
83 | case AV_CODEC_ID_MSMPEG4V2: | |
84 | s->h263_pred = 1; | |
85 | s->msmpeg4_version = 2; | |
86 | break; | |
87 | case AV_CODEC_ID_MSMPEG4V3: | |
88 | s->h263_pred = 1; | |
89 | s->msmpeg4_version = 3; | |
90 | break; | |
91 | case AV_CODEC_ID_WMV1: | |
92 | s->h263_pred = 1; | |
93 | s->msmpeg4_version = 4; | |
94 | break; | |
95 | case AV_CODEC_ID_WMV2: | |
96 | s->h263_pred = 1; | |
97 | s->msmpeg4_version = 5; | |
98 | break; | |
99 | case AV_CODEC_ID_VC1: | |
100 | case AV_CODEC_ID_WMV3: | |
101 | case AV_CODEC_ID_VC1IMAGE: | |
102 | case AV_CODEC_ID_WMV3IMAGE: | |
103 | case AV_CODEC_ID_MSS2: | |
104 | s->h263_pred = 1; | |
105 | s->msmpeg4_version = 6; | |
106 | avctx->chroma_sample_location = AVCHROMA_LOC_LEFT; | |
107 | break; | |
108 | case AV_CODEC_ID_H263I: | |
109 | break; | |
110 | case AV_CODEC_ID_FLV1: | |
111 | s->h263_flv = 1; | |
112 | break; | |
113 | default: | |
114 | av_log(avctx, AV_LOG_ERROR, "Unsupported codec %d\n", | |
115 | avctx->codec->id); | |
116 | return AVERROR(ENOSYS); | |
117 | } | |
118 | s->codec_id = avctx->codec->id; | |
119 | ||
120 | if (avctx->stream_codec_tag == AV_RL32("l263") && avctx->extradata_size == 56 && avctx->extradata[0] == 1) | |
121 | s->ehc_mode = 1; | |
122 | ||
123 | /* for h263, we allocate the images after having read the header */ | |
124 | if (avctx->codec->id != AV_CODEC_ID_H263 && | |
125 | avctx->codec->id != AV_CODEC_ID_H263P && | |
126 | avctx->codec->id != AV_CODEC_ID_MPEG4) { | |
f6fa7814 | 127 | avctx->pix_fmt = h263_get_format(avctx); |
2ba45a60 DM |
128 | ff_mpv_idct_init(s); |
129 | if ((ret = ff_mpv_common_init(s)) < 0) | |
130 | return ret; | |
131 | } | |
132 | ||
133 | ff_h263dsp_init(&s->h263dsp); | |
134 | ff_qpeldsp_init(&s->qdsp); | |
135 | ff_h263_decode_init_vlc(); | |
136 | ||
137 | return 0; | |
138 | } | |
139 | ||
140 | av_cold int ff_h263_decode_end(AVCodecContext *avctx) | |
141 | { | |
142 | MpegEncContext *s = avctx->priv_data; | |
143 | ||
144 | ff_mpv_common_end(s); | |
145 | return 0; | |
146 | } | |
147 | ||
148 | /** | |
149 | * Return the number of bytes consumed for building the current frame. | |
150 | */ | |
151 | static int get_consumed_bytes(MpegEncContext *s, int buf_size) | |
152 | { | |
153 | int pos = (get_bits_count(&s->gb) + 7) >> 3; | |
154 | ||
155 | if (s->divx_packed || s->avctx->hwaccel) { | |
156 | /* We would have to scan through the whole buf to handle the weird | |
157 | * reordering ... */ | |
158 | return buf_size; | |
159 | } else if (s->flags & CODEC_FLAG_TRUNCATED) { | |
160 | pos -= s->parse_context.last_index; | |
161 | // padding is not really read so this might be -1 | |
162 | if (pos < 0) | |
163 | pos = 0; | |
164 | return pos; | |
165 | } else { | |
166 | // avoid infinite loops (maybe not needed...) | |
167 | if (pos == 0) | |
168 | pos = 1; | |
169 | // oops ;) | |
170 | if (pos + 10 > buf_size) | |
171 | pos = buf_size; | |
172 | ||
173 | return pos; | |
174 | } | |
175 | } | |
176 | ||
177 | static int decode_slice(MpegEncContext *s) | |
178 | { | |
179 | const int part_mask = s->partitioned_frame | |
180 | ? (ER_AC_END | ER_AC_ERROR) : 0x7F; | |
181 | const int mb_size = 16 >> s->avctx->lowres; | |
182 | int ret; | |
183 | ||
184 | s->last_resync_gb = s->gb; | |
185 | s->first_slice_line = 1; | |
186 | s->resync_mb_x = s->mb_x; | |
187 | s->resync_mb_y = s->mb_y; | |
188 | ||
189 | ff_set_qscale(s, s->qscale); | |
190 | ||
191 | if (s->avctx->hwaccel) { | |
192 | const uint8_t *start = s->gb.buffer + get_bits_count(&s->gb) / 8; | |
193 | ret = s->avctx->hwaccel->decode_slice(s->avctx, start, s->gb.buffer_end - start); | |
194 | // ensure we exit decode loop | |
195 | s->mb_y = s->mb_height; | |
196 | return ret; | |
197 | } | |
198 | ||
199 | if (s->partitioned_frame) { | |
200 | const int qscale = s->qscale; | |
201 | ||
202 | if (CONFIG_MPEG4_DECODER && s->codec_id == AV_CODEC_ID_MPEG4) | |
203 | if ((ret = ff_mpeg4_decode_partitions(s->avctx->priv_data)) < 0) | |
204 | return ret; | |
205 | ||
206 | /* restore variables which were modified */ | |
207 | s->first_slice_line = 1; | |
208 | s->mb_x = s->resync_mb_x; | |
209 | s->mb_y = s->resync_mb_y; | |
210 | ff_set_qscale(s, qscale); | |
211 | } | |
212 | ||
213 | for (; s->mb_y < s->mb_height; s->mb_y++) { | |
214 | /* per-row end of slice checks */ | |
215 | if (s->msmpeg4_version) { | |
216 | if (s->resync_mb_y + s->slice_height == s->mb_y) { | |
217 | ff_er_add_slice(&s->er, s->resync_mb_x, s->resync_mb_y, | |
218 | s->mb_x - 1, s->mb_y, ER_MB_END); | |
219 | ||
220 | return 0; | |
221 | } | |
222 | } | |
223 | ||
224 | if (s->msmpeg4_version == 1) { | |
225 | s->last_dc[0] = | |
226 | s->last_dc[1] = | |
227 | s->last_dc[2] = 128; | |
228 | } | |
229 | ||
230 | ff_init_block_index(s); | |
231 | for (; s->mb_x < s->mb_width; s->mb_x++) { | |
232 | int ret; | |
233 | ||
234 | ff_update_block_index(s); | |
235 | ||
236 | if (s->resync_mb_x == s->mb_x && s->resync_mb_y + 1 == s->mb_y) | |
237 | s->first_slice_line = 0; | |
238 | ||
239 | /* DCT & quantize */ | |
240 | ||
241 | s->mv_dir = MV_DIR_FORWARD; | |
242 | s->mv_type = MV_TYPE_16X16; | |
243 | av_dlog(s, "%d %d %06X\n", | |
244 | ret, get_bits_count(&s->gb), show_bits(&s->gb, 24)); | |
245 | ||
246 | tprintf(NULL, "Decoding MB at %dx%d\n", s->mb_x, s->mb_y); | |
247 | ret = s->decode_mb(s, s->block); | |
248 | ||
249 | if (s->pict_type != AV_PICTURE_TYPE_B) | |
250 | ff_h263_update_motion_val(s); | |
251 | ||
252 | if (ret < 0) { | |
253 | const int xy = s->mb_x + s->mb_y * s->mb_stride; | |
254 | if (ret == SLICE_END) { | |
255 | ff_mpv_decode_mb(s, s->block); | |
256 | if (s->loop_filter) | |
257 | ff_h263_loop_filter(s); | |
258 | ||
259 | ff_er_add_slice(&s->er, s->resync_mb_x, s->resync_mb_y, | |
260 | s->mb_x, s->mb_y, ER_MB_END & part_mask); | |
261 | ||
262 | s->padding_bug_score--; | |
263 | ||
264 | if (++s->mb_x >= s->mb_width) { | |
265 | s->mb_x = 0; | |
266 | ff_mpeg_draw_horiz_band(s, s->mb_y * mb_size, mb_size); | |
267 | ff_mpv_report_decode_progress(s); | |
268 | s->mb_y++; | |
269 | } | |
270 | return 0; | |
271 | } else if (ret == SLICE_NOEND) { | |
272 | av_log(s->avctx, AV_LOG_ERROR, | |
273 | "Slice mismatch at MB: %d\n", xy); | |
274 | ff_er_add_slice(&s->er, s->resync_mb_x, s->resync_mb_y, | |
275 | s->mb_x + 1, s->mb_y, | |
276 | ER_MB_END & part_mask); | |
277 | return AVERROR_INVALIDDATA; | |
278 | } | |
279 | av_log(s->avctx, AV_LOG_ERROR, "Error at MB: %d\n", xy); | |
280 | ff_er_add_slice(&s->er, s->resync_mb_x, s->resync_mb_y, | |
281 | s->mb_x, s->mb_y, ER_MB_ERROR & part_mask); | |
282 | ||
283 | if (s->err_recognition & AV_EF_IGNORE_ERR) | |
284 | continue; | |
285 | return AVERROR_INVALIDDATA; | |
286 | } | |
287 | ||
288 | ff_mpv_decode_mb(s, s->block); | |
289 | if (s->loop_filter) | |
290 | ff_h263_loop_filter(s); | |
291 | } | |
292 | ||
293 | ff_mpeg_draw_horiz_band(s, s->mb_y * mb_size, mb_size); | |
294 | ff_mpv_report_decode_progress(s); | |
295 | ||
296 | s->mb_x = 0; | |
297 | } | |
298 | ||
299 | av_assert1(s->mb_x == 0 && s->mb_y == s->mb_height); | |
300 | ||
301 | if (s->codec_id == AV_CODEC_ID_MPEG4 && | |
302 | (s->workaround_bugs & FF_BUG_AUTODETECT) && | |
303 | get_bits_left(&s->gb) >= 48 && | |
304 | show_bits(&s->gb, 24) == 0x4010 && | |
305 | !s->data_partitioning) | |
306 | s->padding_bug_score += 32; | |
307 | ||
308 | /* try to detect the padding bug */ | |
309 | if (s->codec_id == AV_CODEC_ID_MPEG4 && | |
310 | (s->workaround_bugs & FF_BUG_AUTODETECT) && | |
311 | get_bits_left(&s->gb) >= 0 && | |
312 | get_bits_left(&s->gb) < 137 && | |
313 | !s->data_partitioning) { | |
314 | const int bits_count = get_bits_count(&s->gb); | |
315 | const int bits_left = s->gb.size_in_bits - bits_count; | |
316 | ||
317 | if (bits_left == 0) { | |
318 | s->padding_bug_score += 16; | |
319 | } else if (bits_left != 1) { | |
320 | int v = show_bits(&s->gb, 8); | |
321 | v |= 0x7F >> (7 - (bits_count & 7)); | |
322 | ||
323 | if (v == 0x7F && bits_left <= 8) | |
324 | s->padding_bug_score--; | |
325 | else if (v == 0x7F && ((get_bits_count(&s->gb) + 8) & 8) && | |
326 | bits_left <= 16) | |
327 | s->padding_bug_score += 4; | |
328 | else | |
329 | s->padding_bug_score++; | |
330 | } | |
331 | } | |
332 | ||
333 | if (s->codec_id == AV_CODEC_ID_H263 && | |
334 | (s->workaround_bugs & FF_BUG_AUTODETECT) && | |
335 | get_bits_left(&s->gb) >= 8 && | |
336 | get_bits_left(&s->gb) < 300 && | |
337 | s->pict_type == AV_PICTURE_TYPE_I && | |
338 | show_bits(&s->gb, 8) == 0 && | |
339 | !s->data_partitioning) { | |
340 | ||
341 | s->padding_bug_score += 32; | |
342 | } | |
343 | ||
344 | if (s->codec_id == AV_CODEC_ID_H263 && | |
345 | (s->workaround_bugs & FF_BUG_AUTODETECT) && | |
346 | get_bits_left(&s->gb) >= 64 && | |
347 | AV_RB64(s->gb.buffer_end - 8) == 0xCDCDCDCDFC7F0000) { | |
348 | ||
349 | s->padding_bug_score += 32; | |
350 | } | |
351 | ||
352 | if (s->workaround_bugs & FF_BUG_AUTODETECT) { | |
f6fa7814 DM |
353 | if ( |
354 | (s->padding_bug_score > -2 && !s->data_partitioning)) | |
2ba45a60 DM |
355 | s->workaround_bugs |= FF_BUG_NO_PADDING; |
356 | else | |
357 | s->workaround_bugs &= ~FF_BUG_NO_PADDING; | |
358 | } | |
359 | ||
360 | // handle formats which don't have unique end markers | |
361 | if (s->msmpeg4_version || (s->workaround_bugs & FF_BUG_NO_PADDING)) { // FIXME perhaps solve this more cleanly | |
362 | int left = get_bits_left(&s->gb); | |
363 | int max_extra = 7; | |
364 | ||
365 | /* no markers in M$ crap */ | |
366 | if (s->msmpeg4_version && s->pict_type == AV_PICTURE_TYPE_I) | |
367 | max_extra += 17; | |
368 | ||
369 | /* buggy padding but the frame should still end approximately at | |
370 | * the bitstream end */ | |
371 | if ((s->workaround_bugs & FF_BUG_NO_PADDING) && | |
372 | (s->err_recognition & (AV_EF_BUFFER|AV_EF_AGGRESSIVE))) | |
373 | max_extra += 48; | |
374 | else if ((s->workaround_bugs & FF_BUG_NO_PADDING)) | |
375 | max_extra += 256 * 256 * 256 * 64; | |
376 | ||
377 | if (left > max_extra) | |
378 | av_log(s->avctx, AV_LOG_ERROR, | |
379 | "discarding %d junk bits at end, next would be %X\n", | |
380 | left, show_bits(&s->gb, 24)); | |
381 | else if (left < 0) | |
382 | av_log(s->avctx, AV_LOG_ERROR, "overreading %d bits\n", -left); | |
383 | else | |
384 | ff_er_add_slice(&s->er, s->resync_mb_x, s->resync_mb_y, | |
385 | s->mb_x - 1, s->mb_y, ER_MB_END); | |
386 | ||
387 | return 0; | |
388 | } | |
389 | ||
390 | av_log(s->avctx, AV_LOG_ERROR, | |
391 | "slice end not reached but screenspace end (%d left %06X, score= %d)\n", | |
392 | get_bits_left(&s->gb), show_bits(&s->gb, 24), s->padding_bug_score); | |
393 | ||
394 | ff_er_add_slice(&s->er, s->resync_mb_x, s->resync_mb_y, s->mb_x, s->mb_y, | |
395 | ER_MB_END & part_mask); | |
396 | ||
397 | return AVERROR_INVALIDDATA; | |
398 | } | |
399 | ||
400 | int ff_h263_decode_frame(AVCodecContext *avctx, void *data, int *got_frame, | |
401 | AVPacket *avpkt) | |
402 | { | |
403 | const uint8_t *buf = avpkt->data; | |
404 | int buf_size = avpkt->size; | |
405 | MpegEncContext *s = avctx->priv_data; | |
406 | int ret; | |
407 | int slice_ret = 0; | |
408 | AVFrame *pict = data; | |
409 | ||
410 | s->flags = avctx->flags; | |
411 | s->flags2 = avctx->flags2; | |
412 | ||
413 | /* no supplementary picture */ | |
414 | if (buf_size == 0) { | |
415 | /* special case for last picture */ | |
416 | if (s->low_delay == 0 && s->next_picture_ptr) { | |
417 | if ((ret = av_frame_ref(pict, s->next_picture_ptr->f)) < 0) | |
418 | return ret; | |
419 | s->next_picture_ptr = NULL; | |
420 | ||
421 | *got_frame = 1; | |
422 | } | |
423 | ||
424 | return 0; | |
425 | } | |
426 | ||
427 | if (s->flags & CODEC_FLAG_TRUNCATED) { | |
428 | int next; | |
429 | ||
430 | if (CONFIG_MPEG4_DECODER && s->codec_id == AV_CODEC_ID_MPEG4) { | |
431 | next = ff_mpeg4_find_frame_end(&s->parse_context, buf, buf_size); | |
432 | } else if (CONFIG_H263_DECODER && s->codec_id == AV_CODEC_ID_H263) { | |
433 | next = ff_h263_find_frame_end(&s->parse_context, buf, buf_size); | |
434 | } else if (CONFIG_H263P_DECODER && s->codec_id == AV_CODEC_ID_H263P) { | |
435 | next = ff_h263_find_frame_end(&s->parse_context, buf, buf_size); | |
436 | } else { | |
437 | av_log(s->avctx, AV_LOG_ERROR, | |
438 | "this codec does not support truncated bitstreams\n"); | |
439 | return AVERROR(ENOSYS); | |
440 | } | |
441 | ||
442 | if (ff_combine_frame(&s->parse_context, next, (const uint8_t **)&buf, | |
443 | &buf_size) < 0) | |
444 | return buf_size; | |
445 | } | |
446 | ||
447 | retry: | |
448 | if (s->divx_packed && s->bitstream_buffer_size) { | |
449 | int i; | |
450 | for(i=0; i < buf_size-3; i++) { | |
451 | if (buf[i]==0 && buf[i+1]==0 && buf[i+2]==1) { | |
452 | if (buf[i+3]==0xB0) { | |
453 | av_log(s->avctx, AV_LOG_WARNING, "Discarding excessive bitstream in packed xvid\n"); | |
454 | s->bitstream_buffer_size = 0; | |
455 | } | |
456 | break; | |
457 | } | |
458 | } | |
459 | } | |
460 | ||
461 | if (s->bitstream_buffer_size && (s->divx_packed || buf_size < 20)) // divx 5.01+/xvid frame reorder | |
462 | ret = init_get_bits8(&s->gb, s->bitstream_buffer, | |
463 | s->bitstream_buffer_size); | |
464 | else | |
465 | ret = init_get_bits8(&s->gb, buf, buf_size); | |
466 | ||
467 | s->bitstream_buffer_size = 0; | |
468 | if (ret < 0) | |
469 | return ret; | |
470 | ||
471 | if (!s->context_initialized) | |
472 | // we need the idct permutaton for reading a custom matrix | |
473 | ff_mpv_idct_init(s); | |
474 | ||
475 | /* let's go :-) */ | |
476 | if (CONFIG_WMV2_DECODER && s->msmpeg4_version == 5) { | |
477 | ret = ff_wmv2_decode_picture_header(s); | |
478 | } else if (CONFIG_MSMPEG4_DECODER && s->msmpeg4_version) { | |
479 | ret = ff_msmpeg4_decode_picture_header(s); | |
480 | } else if (CONFIG_MPEG4_DECODER && avctx->codec_id == AV_CODEC_ID_MPEG4) { | |
481 | if (s->avctx->extradata_size && s->picture_number == 0) { | |
482 | GetBitContext gb; | |
483 | ||
484 | if (init_get_bits8(&gb, s->avctx->extradata, s->avctx->extradata_size) >= 0 ) | |
485 | ff_mpeg4_decode_picture_header(avctx->priv_data, &gb); | |
486 | } | |
487 | ret = ff_mpeg4_decode_picture_header(avctx->priv_data, &s->gb); | |
488 | } else if (CONFIG_H263I_DECODER && s->codec_id == AV_CODEC_ID_H263I) { | |
489 | ret = ff_intel_h263_decode_picture_header(s); | |
490 | } else if (CONFIG_FLV_DECODER && s->h263_flv) { | |
491 | ret = ff_flv_decode_picture_header(s); | |
492 | } else { | |
493 | ret = ff_h263_decode_picture_header(s); | |
494 | } | |
495 | ||
496 | if (ret < 0 || ret == FRAME_SKIPPED) { | |
497 | if ( s->width != avctx->coded_width | |
498 | || s->height != avctx->coded_height) { | |
499 | av_log(s->avctx, AV_LOG_WARNING, "Reverting picture dimensions change due to header decoding failure\n"); | |
500 | s->width = avctx->coded_width; | |
501 | s->height= avctx->coded_height; | |
502 | } | |
503 | } | |
504 | if (ret == FRAME_SKIPPED) | |
505 | return get_consumed_bytes(s, buf_size); | |
506 | ||
507 | /* skip if the header was thrashed */ | |
508 | if (ret < 0) { | |
509 | av_log(s->avctx, AV_LOG_ERROR, "header damaged\n"); | |
510 | return ret; | |
511 | } | |
512 | ||
f6fa7814 DM |
513 | if (!s->context_initialized) { |
514 | avctx->pix_fmt = h263_get_format(avctx); | |
2ba45a60 DM |
515 | if ((ret = ff_mpv_common_init(s)) < 0) |
516 | return ret; | |
f6fa7814 | 517 | } |
2ba45a60 DM |
518 | |
519 | if (!s->current_picture_ptr || s->current_picture_ptr->f->data[0]) { | |
520 | int i = ff_find_unused_picture(s, 0); | |
521 | if (i < 0) | |
522 | return i; | |
523 | s->current_picture_ptr = &s->picture[i]; | |
524 | } | |
525 | ||
526 | avctx->has_b_frames = !s->low_delay; | |
527 | ||
528 | if (CONFIG_MPEG4_DECODER && avctx->codec_id == AV_CODEC_ID_MPEG4) { | |
529 | if (ff_mpeg4_workaround_bugs(avctx) == 1) | |
530 | goto retry; | |
531 | } | |
532 | ||
533 | /* After H263 & mpeg4 header decode we have the height, width, | |
534 | * and other parameters. So then we could init the picture. | |
535 | * FIXME: By the way H263 decoder is evolving it should have | |
536 | * an H263EncContext */ | |
537 | if (s->width != avctx->coded_width || | |
538 | s->height != avctx->coded_height || | |
539 | s->context_reinit) { | |
540 | /* H.263 could change picture size any time */ | |
541 | s->context_reinit = 0; | |
542 | ||
543 | ret = ff_set_dimensions(avctx, s->width, s->height); | |
544 | if (ret < 0) | |
545 | return ret; | |
546 | ||
547 | ff_set_sar(avctx, avctx->sample_aspect_ratio); | |
548 | ||
549 | if ((ret = ff_mpv_common_frame_size_change(s))) | |
550 | return ret; | |
f6fa7814 DM |
551 | |
552 | if (avctx->pix_fmt != h263_get_format(avctx)) { | |
553 | av_log(avctx, AV_LOG_ERROR, "format change not supported\n"); | |
554 | avctx->pix_fmt = AV_PIX_FMT_NONE; | |
555 | return AVERROR_UNKNOWN; | |
556 | } | |
2ba45a60 DM |
557 | } |
558 | ||
559 | if (s->codec_id == AV_CODEC_ID_H263 || | |
560 | s->codec_id == AV_CODEC_ID_H263P || | |
561 | s->codec_id == AV_CODEC_ID_H263I) | |
562 | s->gob_index = ff_h263_get_gob_height(s); | |
563 | ||
564 | // for skipping the frame | |
565 | s->current_picture.f->pict_type = s->pict_type; | |
566 | s->current_picture.f->key_frame = s->pict_type == AV_PICTURE_TYPE_I; | |
567 | ||
568 | /* skip B-frames if we don't have reference frames */ | |
569 | if (!s->last_picture_ptr && | |
570 | (s->pict_type == AV_PICTURE_TYPE_B || s->droppable)) | |
571 | return get_consumed_bytes(s, buf_size); | |
572 | if ((avctx->skip_frame >= AVDISCARD_NONREF && | |
573 | s->pict_type == AV_PICTURE_TYPE_B) || | |
574 | (avctx->skip_frame >= AVDISCARD_NONKEY && | |
575 | s->pict_type != AV_PICTURE_TYPE_I) || | |
576 | avctx->skip_frame >= AVDISCARD_ALL) | |
577 | return get_consumed_bytes(s, buf_size); | |
578 | ||
579 | if (s->next_p_frame_damaged) { | |
580 | if (s->pict_type == AV_PICTURE_TYPE_B) | |
581 | return get_consumed_bytes(s, buf_size); | |
582 | else | |
583 | s->next_p_frame_damaged = 0; | |
584 | } | |
585 | ||
586 | if ((!s->no_rounding) || s->pict_type == AV_PICTURE_TYPE_B) { | |
587 | s->me.qpel_put = s->qdsp.put_qpel_pixels_tab; | |
588 | s->me.qpel_avg = s->qdsp.avg_qpel_pixels_tab; | |
589 | } else { | |
590 | s->me.qpel_put = s->qdsp.put_no_rnd_qpel_pixels_tab; | |
591 | s->me.qpel_avg = s->qdsp.avg_qpel_pixels_tab; | |
592 | } | |
593 | ||
594 | if ((ret = ff_mpv_frame_start(s, avctx)) < 0) | |
595 | return ret; | |
596 | ||
597 | if (!s->divx_packed && !avctx->hwaccel) | |
598 | ff_thread_finish_setup(avctx); | |
599 | ||
600 | if (CONFIG_MPEG4_VDPAU_DECODER && (s->avctx->codec->capabilities & CODEC_CAP_HWACCEL_VDPAU)) { | |
601 | ff_vdpau_mpeg4_decode_picture(avctx->priv_data, s->gb.buffer, s->gb.buffer_end - s->gb.buffer); | |
602 | goto frame_end; | |
603 | } | |
604 | ||
605 | if (avctx->hwaccel) { | |
606 | ret = avctx->hwaccel->start_frame(avctx, s->gb.buffer, | |
607 | s->gb.buffer_end - s->gb.buffer); | |
608 | if (ret < 0 ) | |
609 | return ret; | |
610 | } | |
611 | ||
612 | ff_mpeg_er_frame_start(s); | |
613 | ||
614 | /* the second part of the wmv2 header contains the MB skip bits which | |
615 | * are stored in current_picture->mb_type which is not available before | |
616 | * ff_mpv_frame_start() */ | |
617 | if (CONFIG_WMV2_DECODER && s->msmpeg4_version == 5) { | |
618 | ret = ff_wmv2_decode_secondary_picture_header(s); | |
619 | if (ret < 0) | |
620 | return ret; | |
621 | if (ret == 1) | |
622 | goto frame_end; | |
623 | } | |
624 | ||
625 | /* decode each macroblock */ | |
626 | s->mb_x = 0; | |
627 | s->mb_y = 0; | |
628 | ||
629 | slice_ret = decode_slice(s); | |
630 | while (s->mb_y < s->mb_height) { | |
631 | if (s->msmpeg4_version) { | |
632 | if (s->slice_height == 0 || s->mb_x != 0 || | |
633 | (s->mb_y % s->slice_height) != 0 || get_bits_left(&s->gb) < 0) | |
634 | break; | |
635 | } else { | |
636 | int prev_x = s->mb_x, prev_y = s->mb_y; | |
637 | if (ff_h263_resync(s) < 0) | |
638 | break; | |
639 | if (prev_y * s->mb_width + prev_x < s->mb_y * s->mb_width + s->mb_x) | |
640 | s->er.error_occurred = 1; | |
641 | } | |
642 | ||
643 | if (s->msmpeg4_version < 4 && s->h263_pred) | |
644 | ff_mpeg4_clean_buffers(s); | |
645 | ||
646 | if (decode_slice(s) < 0) | |
647 | slice_ret = AVERROR_INVALIDDATA; | |
648 | } | |
649 | ||
650 | if (s->msmpeg4_version && s->msmpeg4_version < 4 && | |
651 | s->pict_type == AV_PICTURE_TYPE_I) | |
652 | if (!CONFIG_MSMPEG4_DECODER || | |
653 | ff_msmpeg4_decode_ext_header(s, buf_size) < 0) | |
654 | s->er.error_status_table[s->mb_num - 1] = ER_MB_ERROR; | |
655 | ||
656 | av_assert1(s->bitstream_buffer_size == 0); | |
657 | frame_end: | |
658 | ff_er_frame_end(&s->er); | |
659 | ||
660 | if (avctx->hwaccel) { | |
661 | ret = avctx->hwaccel->end_frame(avctx); | |
662 | if (ret < 0) | |
663 | return ret; | |
664 | } | |
665 | ||
666 | ff_mpv_frame_end(s); | |
667 | ||
668 | if (CONFIG_MPEG4_DECODER && avctx->codec_id == AV_CODEC_ID_MPEG4) | |
669 | ff_mpeg4_frame_end(avctx, buf, buf_size); | |
670 | ||
671 | if (!s->divx_packed && avctx->hwaccel) | |
672 | ff_thread_finish_setup(avctx); | |
673 | ||
674 | av_assert1(s->current_picture.f->pict_type == s->current_picture_ptr->f->pict_type); | |
675 | av_assert1(s->current_picture.f->pict_type == s->pict_type); | |
676 | if (s->pict_type == AV_PICTURE_TYPE_B || s->low_delay) { | |
677 | if ((ret = av_frame_ref(pict, s->current_picture_ptr->f)) < 0) | |
678 | return ret; | |
679 | ff_print_debug_info(s, s->current_picture_ptr, pict); | |
680 | ff_mpv_export_qp_table(s, pict, s->current_picture_ptr, FF_QSCALE_TYPE_MPEG1); | |
681 | } else if (s->last_picture_ptr) { | |
682 | if ((ret = av_frame_ref(pict, s->last_picture_ptr->f)) < 0) | |
683 | return ret; | |
684 | ff_print_debug_info(s, s->last_picture_ptr, pict); | |
685 | ff_mpv_export_qp_table(s, pict, s->last_picture_ptr, FF_QSCALE_TYPE_MPEG1); | |
686 | } | |
687 | ||
688 | if (s->last_picture_ptr || s->low_delay) { | |
689 | if ( pict->format == AV_PIX_FMT_YUV420P | |
690 | && (s->codec_tag == AV_RL32("GEOV") || s->codec_tag == AV_RL32("GEOX"))) { | |
691 | int x, y, p; | |
692 | av_frame_make_writable(pict); | |
693 | for (p=0; p<3; p++) { | |
694 | int w = FF_CEIL_RSHIFT(pict-> width, !!p); | |
695 | int h = FF_CEIL_RSHIFT(pict->height, !!p); | |
696 | int linesize = pict->linesize[p]; | |
697 | for (y=0; y<(h>>1); y++) | |
698 | for (x=0; x<w; x++) | |
699 | FFSWAP(int, | |
700 | pict->data[p][x + y*linesize], | |
701 | pict->data[p][x + (h-1-y)*linesize]); | |
702 | } | |
703 | } | |
704 | *got_frame = 1; | |
705 | } | |
706 | ||
707 | if (slice_ret < 0 && (avctx->err_recognition & AV_EF_EXPLODE)) | |
708 | return ret; | |
709 | else | |
710 | return get_consumed_bytes(s, buf_size); | |
711 | } | |
712 | ||
713 | const enum AVPixelFormat ff_h263_hwaccel_pixfmt_list_420[] = { | |
714 | #if CONFIG_H263_VAAPI_HWACCEL || CONFIG_MPEG4_VAAPI_HWACCEL | |
715 | AV_PIX_FMT_VAAPI_VLD, | |
716 | #endif | |
717 | #if CONFIG_H263_VDPAU_HWACCEL || CONFIG_MPEG4_VDPAU_HWACCEL | |
718 | AV_PIX_FMT_VDPAU, | |
719 | #endif | |
720 | AV_PIX_FMT_YUV420P, | |
721 | AV_PIX_FMT_NONE | |
722 | }; | |
723 | ||
724 | AVCodec ff_h263_decoder = { | |
725 | .name = "h263", | |
726 | .long_name = NULL_IF_CONFIG_SMALL("H.263 / H.263-1996, H.263+ / H.263-1998 / H.263 version 2"), | |
727 | .type = AVMEDIA_TYPE_VIDEO, | |
728 | .id = AV_CODEC_ID_H263, | |
729 | .priv_data_size = sizeof(MpegEncContext), | |
730 | .init = ff_h263_decode_init, | |
731 | .close = ff_h263_decode_end, | |
732 | .decode = ff_h263_decode_frame, | |
733 | .capabilities = CODEC_CAP_DRAW_HORIZ_BAND | CODEC_CAP_DR1 | | |
734 | CODEC_CAP_TRUNCATED | CODEC_CAP_DELAY, | |
735 | .flush = ff_mpeg_flush, | |
736 | .max_lowres = 3, | |
737 | .pix_fmts = ff_h263_hwaccel_pixfmt_list_420, | |
738 | }; | |
739 | ||
740 | AVCodec ff_h263p_decoder = { | |
741 | .name = "h263p", | |
742 | .long_name = NULL_IF_CONFIG_SMALL("H.263 / H.263-1996, H.263+ / H.263-1998 / H.263 version 2"), | |
743 | .type = AVMEDIA_TYPE_VIDEO, | |
744 | .id = AV_CODEC_ID_H263P, | |
745 | .priv_data_size = sizeof(MpegEncContext), | |
746 | .init = ff_h263_decode_init, | |
747 | .close = ff_h263_decode_end, | |
748 | .decode = ff_h263_decode_frame, | |
749 | .capabilities = CODEC_CAP_DRAW_HORIZ_BAND | CODEC_CAP_DR1 | | |
750 | CODEC_CAP_TRUNCATED | CODEC_CAP_DELAY, | |
751 | .flush = ff_mpeg_flush, | |
752 | .max_lowres = 3, | |
753 | .pix_fmts = ff_h263_hwaccel_pixfmt_list_420, | |
754 | }; |