1 /*
2 * generic decoding-related code
3 *
4 * This file is part of FFmpeg.
5 *
6 * FFmpeg is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU Lesser General Public
8 * License as published by the Free Software Foundation; either
9 * version 2.1 of the License, or (at your option) any later version.
10 *
11 * FFmpeg is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 * Lesser General Public License for more details.
15 *
16 * You should have received a copy of the GNU Lesser General Public
17 * License along with FFmpeg; if not, write to the Free Software
18 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
19 */
20
21 #include <stdint.h>
22 #include <string.h>
23
24 #include "config.h"
25
26 #if CONFIG_ICONV
27 # include <iconv.h>
28 #endif
29
30 #include "libavutil/avassert.h"
31 #include "libavutil/avstring.h"
32 #include "libavutil/bprint.h"
33 #include "libavutil/common.h"
34 #include "libavutil/frame.h"
35 #include "libavutil/hwcontext.h"
36 #include "libavutil/imgutils.h"
37 #include "libavutil/internal.h"
38 #include "libavutil/intmath.h"
39 #include "libavutil/opt.h"
40
41 #include "avcodec.h"
42 #include "bytestream.h"
43 #include "decode.h"
44 #include "hwconfig.h"
45 #include "internal.h"
46 #include "thread.h"
47
48 typedef struct FramePool {
49 /**
50 * Pools for each data plane. For audio all the planes have the same size,
51 * so only pools[0] is used.
52 */
53 AVBufferPool *pools[4];
54
55 /*
56 * Pool parameters
57 */
58 int format;
59 int width, height;
60 int stride_align[AV_NUM_DATA_POINTERS];
61 int linesize[4];
62 int planes;
63 int channels;
64 int samples;
65 } FramePool;
66
apply_param_change(AVCodecContext * avctx,const AVPacket * avpkt)67 static int apply_param_change(AVCodecContext *avctx, const AVPacket *avpkt)
68 {
69 int ret;
70 buffer_size_t size;
71 const uint8_t *data;
72 uint32_t flags;
73 int64_t val;
74
75 data = av_packet_get_side_data(avpkt, AV_PKT_DATA_PARAM_CHANGE, &size);
76 if (!data)
77 return 0;
78
79 if (!(avctx->codec->capabilities & AV_CODEC_CAP_PARAM_CHANGE)) {
80 av_log(avctx, AV_LOG_ERROR, "This decoder does not support parameter "
81 "changes, but PARAM_CHANGE side data was sent to it.\n");
82 ret = AVERROR(EINVAL);
83 goto fail2;
84 }
85
86 if (size < 4)
87 goto fail;
88
89 flags = bytestream_get_le32(&data);
90 size -= 4;
91
92 if (flags & AV_SIDE_DATA_PARAM_CHANGE_CHANNEL_COUNT) {
93 if (size < 4)
94 goto fail;
95 val = bytestream_get_le32(&data);
96 if (val <= 0 || val > INT_MAX) {
97 av_log(avctx, AV_LOG_ERROR, "Invalid channel count");
98 ret = AVERROR_INVALIDDATA;
99 goto fail2;
100 }
101 avctx->channels = val;
102 size -= 4;
103 }
104 if (flags & AV_SIDE_DATA_PARAM_CHANGE_CHANNEL_LAYOUT) {
105 if (size < 8)
106 goto fail;
107 avctx->channel_layout = bytestream_get_le64(&data);
108 size -= 8;
109 }
110 if (flags & AV_SIDE_DATA_PARAM_CHANGE_SAMPLE_RATE) {
111 if (size < 4)
112 goto fail;
113 val = bytestream_get_le32(&data);
114 if (val <= 0 || val > INT_MAX) {
115 av_log(avctx, AV_LOG_ERROR, "Invalid sample rate");
116 ret = AVERROR_INVALIDDATA;
117 goto fail2;
118 }
119 avctx->sample_rate = val;
120 size -= 4;
121 }
122 if (flags & AV_SIDE_DATA_PARAM_CHANGE_DIMENSIONS) {
123 if (size < 8)
124 goto fail;
125 avctx->width = bytestream_get_le32(&data);
126 avctx->height = bytestream_get_le32(&data);
127 size -= 8;
128 ret = ff_set_dimensions(avctx, avctx->width, avctx->height);
129 if (ret < 0)
130 goto fail2;
131 }
132
133 return 0;
134 fail:
135 av_log(avctx, AV_LOG_ERROR, "PARAM_CHANGE side data too small.\n");
136 ret = AVERROR_INVALIDDATA;
137 fail2:
138 if (ret < 0) {
139 av_log(avctx, AV_LOG_ERROR, "Error applying parameter changes.\n");
140 if (avctx->err_recognition & AV_EF_EXPLODE)
141 return ret;
142 }
143 return 0;
144 }
145
146 #define IS_EMPTY(pkt) (!(pkt)->data)
147
copy_packet_props(AVPacket * dst,const AVPacket * src)148 static int copy_packet_props(AVPacket *dst, const AVPacket *src)
149 {
150 int ret = av_packet_copy_props(dst, src);
151 if (ret < 0)
152 return ret;
153
154 dst->size = src->size; // HACK: Needed for ff_decode_frame_props().
155 dst->data = (void*)1; // HACK: Needed for IS_EMPTY().
156
157 return 0;
158 }
159
extract_packet_props(AVCodecInternal * avci,const AVPacket * pkt)160 static int extract_packet_props(AVCodecInternal *avci, const AVPacket *pkt)
161 {
162 AVPacket tmp = { 0 };
163 int ret = 0;
164
165 if (IS_EMPTY(avci->last_pkt_props)) {
166 if (av_fifo_size(avci->pkt_props) >= sizeof(*pkt)) {
167 av_fifo_generic_read(avci->pkt_props, avci->last_pkt_props,
168 sizeof(*avci->last_pkt_props), NULL);
169 } else
170 return copy_packet_props(avci->last_pkt_props, pkt);
171 }
172
173 if (av_fifo_space(avci->pkt_props) < sizeof(*pkt)) {
174 ret = av_fifo_grow(avci->pkt_props, sizeof(*pkt));
175 if (ret < 0)
176 return ret;
177 }
178
179 ret = copy_packet_props(&tmp, pkt);
180 if (ret < 0)
181 return ret;
182
183 av_fifo_generic_write(avci->pkt_props, &tmp, sizeof(tmp), NULL);
184
185 return 0;
186 }
187
decode_bsfs_init(AVCodecContext * avctx)188 static int decode_bsfs_init(AVCodecContext *avctx)
189 {
190 AVCodecInternal *avci = avctx->internal;
191 int ret;
192
193 if (avci->bsf)
194 return 0;
195
196 ret = av_bsf_list_parse_str(avctx->codec->bsfs, &avci->bsf);
197 if (ret < 0) {
198 av_log(avctx, AV_LOG_ERROR, "Error parsing decoder bitstream filters '%s': %s\n", avctx->codec->bsfs, av_err2str(ret));
199 if (ret != AVERROR(ENOMEM))
200 ret = AVERROR_BUG;
201 goto fail;
202 }
203
204 /* We do not currently have an API for passing the input timebase into decoders,
205 * but no filters used here should actually need it.
206 * So we make up some plausible-looking number (the MPEG 90kHz timebase) */
207 avci->bsf->time_base_in = (AVRational){ 1, 90000 };
208 ret = avcodec_parameters_from_context(avci->bsf->par_in, avctx);
209 if (ret < 0)
210 goto fail;
211
212 ret = av_bsf_init(avci->bsf);
213 if (ret < 0)
214 goto fail;
215
216 return 0;
217 fail:
218 av_bsf_free(&avci->bsf);
219 return ret;
220 }
221
ff_decode_get_packet(AVCodecContext * avctx,AVPacket * pkt)222 int ff_decode_get_packet(AVCodecContext *avctx, AVPacket *pkt)
223 {
224 AVCodecInternal *avci = avctx->internal;
225 int ret;
226
227 if (avci->draining)
228 return AVERROR_EOF;
229
230 ret = av_bsf_receive_packet(avci->bsf, pkt);
231 if (ret == AVERROR_EOF)
232 avci->draining = 1;
233 if (ret < 0)
234 return ret;
235
236 if (!(avctx->codec->caps_internal & FF_CODEC_CAP_SETS_FRAME_PROPS)) {
237 ret = extract_packet_props(avctx->internal, pkt);
238 if (ret < 0)
239 goto finish;
240 }
241
242 ret = apply_param_change(avctx, pkt);
243 if (ret < 0)
244 goto finish;
245
246 #if FF_API_OLD_ENCDEC
247 if (avctx->codec->receive_frame)
248 avci->compat_decode_consumed += pkt->size;
249 #endif
250
251 return 0;
252 finish:
253 av_packet_unref(pkt);
254 return ret;
255 }
256
257 /**
258 * Attempt to guess proper monotonic timestamps for decoded video frames
259 * which might have incorrect times. Input timestamps may wrap around, in
260 * which case the output will as well.
261 *
262 * @param pts the pts field of the decoded AVPacket, as passed through
263 * AVFrame.pts
264 * @param dts the dts field of the decoded AVPacket
265 * @return one of the input values, may be AV_NOPTS_VALUE
266 */
guess_correct_pts(AVCodecContext * ctx,int64_t reordered_pts,int64_t dts)267 static int64_t guess_correct_pts(AVCodecContext *ctx,
268 int64_t reordered_pts, int64_t dts)
269 {
270 int64_t pts = AV_NOPTS_VALUE;
271
272 if (dts != AV_NOPTS_VALUE) {
273 ctx->pts_correction_num_faulty_dts += dts <= ctx->pts_correction_last_dts;
274 ctx->pts_correction_last_dts = dts;
275 } else if (reordered_pts != AV_NOPTS_VALUE)
276 ctx->pts_correction_last_dts = reordered_pts;
277
278 if (reordered_pts != AV_NOPTS_VALUE) {
279 ctx->pts_correction_num_faulty_pts += reordered_pts <= ctx->pts_correction_last_pts;
280 ctx->pts_correction_last_pts = reordered_pts;
281 } else if(dts != AV_NOPTS_VALUE)
282 ctx->pts_correction_last_pts = dts;
283
284 if ((ctx->pts_correction_num_faulty_pts<=ctx->pts_correction_num_faulty_dts || dts == AV_NOPTS_VALUE)
285 && reordered_pts != AV_NOPTS_VALUE)
286 pts = reordered_pts;
287 else
288 pts = dts;
289
290 return pts;
291 }
292
293 /*
294 * The core of the receive_frame_wrapper for the decoders implementing
295 * the simple API. Certain decoders might consume partial packets without
296 * returning any output, so this function needs to be called in a loop until it
297 * returns EAGAIN.
298 **/
decode_simple_internal(AVCodecContext * avctx,AVFrame * frame,int64_t * discarded_samples)299 static inline int decode_simple_internal(AVCodecContext *avctx, AVFrame *frame, int64_t *discarded_samples)
300 {
301 AVCodecInternal *avci = avctx->internal;
302 DecodeSimpleContext *ds = &avci->ds;
303 AVPacket *pkt = ds->in_pkt;
304 int got_frame, actual_got_frame;
305 int ret;
306
307 if (!pkt->data && !avci->draining) {
308 av_packet_unref(pkt);
309 ret = ff_decode_get_packet(avctx, pkt);
310 if (ret < 0 && ret != AVERROR_EOF)
311 return ret;
312 }
313
314 // Some codecs (at least wma lossless) will crash when feeding drain packets
315 // after EOF was signaled.
316 if (avci->draining_done)
317 return AVERROR_EOF;
318
319 if (!pkt->data &&
320 !(avctx->codec->capabilities & AV_CODEC_CAP_DELAY ||
321 avctx->active_thread_type & FF_THREAD_FRAME))
322 return AVERROR_EOF;
323
324 got_frame = 0;
325
326 if (HAVE_THREADS && avctx->active_thread_type & FF_THREAD_FRAME) {
327 ret = ff_thread_decode_frame(avctx, frame, &got_frame, pkt);
328 } else {
329 ret = avctx->codec->decode(avctx, frame, &got_frame, pkt);
330
331 if (!(avctx->codec->caps_internal & FF_CODEC_CAP_SETS_PKT_DTS))
332 frame->pkt_dts = pkt->dts;
333 if (avctx->codec->type == AVMEDIA_TYPE_VIDEO) {
334 if(!avctx->has_b_frames)
335 frame->pkt_pos = pkt->pos;
336 //FIXME these should be under if(!avctx->has_b_frames)
337 /* get_buffer is supposed to set frame parameters */
338 if (!(avctx->codec->capabilities & AV_CODEC_CAP_DR1)) {
339 if (!frame->sample_aspect_ratio.num) frame->sample_aspect_ratio = avctx->sample_aspect_ratio;
340 if (!frame->width) frame->width = avctx->width;
341 if (!frame->height) frame->height = avctx->height;
342 if (frame->format == AV_PIX_FMT_NONE) frame->format = avctx->pix_fmt;
343 }
344 }
345 }
346 emms_c();
347 actual_got_frame = got_frame;
348
349 if (avctx->codec->type == AVMEDIA_TYPE_VIDEO) {
350 if (frame->flags & AV_FRAME_FLAG_DISCARD)
351 got_frame = 0;
352 } else if (avctx->codec->type == AVMEDIA_TYPE_AUDIO) {
353 uint8_t *side;
354 buffer_size_t side_size;
355 uint32_t discard_padding = 0;
356 uint8_t skip_reason = 0;
357 uint8_t discard_reason = 0;
358
359 if (ret >= 0 && got_frame) {
360 if (frame->format == AV_SAMPLE_FMT_NONE)
361 frame->format = avctx->sample_fmt;
362 if (!frame->channel_layout)
363 frame->channel_layout = avctx->channel_layout;
364 if (!frame->channels)
365 frame->channels = avctx->channels;
366 if (!frame->sample_rate)
367 frame->sample_rate = avctx->sample_rate;
368 }
369
370 side= av_packet_get_side_data(avci->last_pkt_props, AV_PKT_DATA_SKIP_SAMPLES, &side_size);
371 if(side && side_size>=10) {
372 avci->skip_samples = AV_RL32(side) * avci->skip_samples_multiplier;
373 discard_padding = AV_RL32(side + 4);
374 av_log(avctx, AV_LOG_DEBUG, "skip %d / discard %d samples due to side data\n",
375 avci->skip_samples, (int)discard_padding);
376 skip_reason = AV_RL8(side + 8);
377 discard_reason = AV_RL8(side + 9);
378 }
379
380 if ((frame->flags & AV_FRAME_FLAG_DISCARD) && got_frame &&
381 !(avctx->flags2 & AV_CODEC_FLAG2_SKIP_MANUAL)) {
382 avci->skip_samples = FFMAX(0, avci->skip_samples - frame->nb_samples);
383 got_frame = 0;
384 *discarded_samples += frame->nb_samples;
385 }
386
387 if (avci->skip_samples > 0 && got_frame &&
388 !(avctx->flags2 & AV_CODEC_FLAG2_SKIP_MANUAL)) {
389 if(frame->nb_samples <= avci->skip_samples){
390 got_frame = 0;
391 *discarded_samples += frame->nb_samples;
392 avci->skip_samples -= frame->nb_samples;
393 av_log(avctx, AV_LOG_DEBUG, "skip whole frame, skip left: %d\n",
394 avci->skip_samples);
395 } else {
396 av_samples_copy(frame->extended_data, frame->extended_data, 0, avci->skip_samples,
397 frame->nb_samples - avci->skip_samples, avctx->channels, frame->format);
398 if(avctx->pkt_timebase.num && avctx->sample_rate) {
399 int64_t diff_ts = av_rescale_q(avci->skip_samples,
400 (AVRational){1, avctx->sample_rate},
401 avctx->pkt_timebase);
402 if(frame->pts!=AV_NOPTS_VALUE)
403 frame->pts += diff_ts;
404 #if FF_API_PKT_PTS
405 FF_DISABLE_DEPRECATION_WARNINGS
406 if(frame->pkt_pts!=AV_NOPTS_VALUE)
407 frame->pkt_pts += diff_ts;
408 FF_ENABLE_DEPRECATION_WARNINGS
409 #endif
410 if(frame->pkt_dts!=AV_NOPTS_VALUE)
411 frame->pkt_dts += diff_ts;
412 if (frame->pkt_duration >= diff_ts)
413 frame->pkt_duration -= diff_ts;
414 } else {
415 av_log(avctx, AV_LOG_WARNING, "Could not update timestamps for skipped samples.\n");
416 }
417 av_log(avctx, AV_LOG_DEBUG, "skip %d/%d samples\n",
418 avci->skip_samples, frame->nb_samples);
419 *discarded_samples += avci->skip_samples;
420 frame->nb_samples -= avci->skip_samples;
421 avci->skip_samples = 0;
422 }
423 }
424
425 if (discard_padding > 0 && discard_padding <= frame->nb_samples && got_frame &&
426 !(avctx->flags2 & AV_CODEC_FLAG2_SKIP_MANUAL)) {
427 if (discard_padding == frame->nb_samples) {
428 *discarded_samples += frame->nb_samples;
429 got_frame = 0;
430 } else {
431 if(avctx->pkt_timebase.num && avctx->sample_rate) {
432 int64_t diff_ts = av_rescale_q(frame->nb_samples - discard_padding,
433 (AVRational){1, avctx->sample_rate},
434 avctx->pkt_timebase);
435 frame->pkt_duration = diff_ts;
436 } else {
437 av_log(avctx, AV_LOG_WARNING, "Could not update timestamps for discarded samples.\n");
438 }
439 av_log(avctx, AV_LOG_DEBUG, "discard %d/%d samples\n",
440 (int)discard_padding, frame->nb_samples);
441 frame->nb_samples -= discard_padding;
442 }
443 }
444
445 if ((avctx->flags2 & AV_CODEC_FLAG2_SKIP_MANUAL) && got_frame) {
446 AVFrameSideData *fside = av_frame_new_side_data(frame, AV_FRAME_DATA_SKIP_SAMPLES, 10);
447 if (fside) {
448 AV_WL32(fside->data, avci->skip_samples);
449 AV_WL32(fside->data + 4, discard_padding);
450 AV_WL8(fside->data + 8, skip_reason);
451 AV_WL8(fside->data + 9, discard_reason);
452 avci->skip_samples = 0;
453 }
454 }
455 }
456
457 if (avctx->codec->type == AVMEDIA_TYPE_AUDIO &&
458 !avci->showed_multi_packet_warning &&
459 ret >= 0 && ret != pkt->size && !(avctx->codec->capabilities & AV_CODEC_CAP_SUBFRAMES)) {
460 av_log(avctx, AV_LOG_WARNING, "Multiple frames in a packet.\n");
461 avci->showed_multi_packet_warning = 1;
462 }
463
464 if (!got_frame)
465 av_frame_unref(frame);
466
467 if (ret >= 0 && avctx->codec->type == AVMEDIA_TYPE_VIDEO && !(avctx->flags & AV_CODEC_FLAG_TRUNCATED))
468 ret = pkt->size;
469
470 #if FF_API_AVCTX_TIMEBASE
471 if (avctx->framerate.num > 0 && avctx->framerate.den > 0)
472 avctx->time_base = av_inv_q(av_mul_q(avctx->framerate, (AVRational){avctx->ticks_per_frame, 1}));
473 #endif
474
475 /* do not stop draining when actual_got_frame != 0 or ret < 0 */
476 /* got_frame == 0 but actual_got_frame != 0 when frame is discarded */
477 if (avci->draining && !actual_got_frame) {
478 if (ret < 0) {
479 /* prevent infinite loop if a decoder wrongly always return error on draining */
480 /* reasonable nb_errors_max = maximum b frames + thread count */
481 int nb_errors_max = 20 + (HAVE_THREADS && avctx->active_thread_type & FF_THREAD_FRAME ?
482 avctx->thread_count : 1);
483
484 if (avci->nb_draining_errors++ >= nb_errors_max) {
485 av_log(avctx, AV_LOG_ERROR, "Too many errors when draining, this is a bug. "
486 "Stop draining and force EOF.\n");
487 avci->draining_done = 1;
488 ret = AVERROR_BUG;
489 }
490 } else {
491 avci->draining_done = 1;
492 }
493 }
494
495 #if FF_API_OLD_ENCDEC
496 avci->compat_decode_consumed += ret;
497 #endif
498
499 if (ret >= pkt->size || ret < 0) {
500 av_packet_unref(pkt);
501 av_packet_unref(avci->last_pkt_props);
502 } else {
503 int consumed = ret;
504
505 pkt->data += consumed;
506 pkt->size -= consumed;
507 pkt->pts = AV_NOPTS_VALUE;
508 pkt->dts = AV_NOPTS_VALUE;
509 if (!(avctx->codec->caps_internal & FF_CODEC_CAP_SETS_FRAME_PROPS)) {
510 avci->last_pkt_props->size -= consumed; // See extract_packet_props() comment.
511 avci->last_pkt_props->pts = AV_NOPTS_VALUE;
512 avci->last_pkt_props->dts = AV_NOPTS_VALUE;
513 }
514 }
515
516 if (got_frame)
517 av_assert0(frame->buf[0]);
518
519 return ret < 0 ? ret : 0;
520 }
521
decode_simple_receive_frame(AVCodecContext * avctx,AVFrame * frame)522 static int decode_simple_receive_frame(AVCodecContext *avctx, AVFrame *frame)
523 {
524 int ret;
525 int64_t discarded_samples = 0;
526
527 while (!frame->buf[0]) {
528 if (discarded_samples > avctx->max_samples)
529 return AVERROR(EAGAIN);
530 ret = decode_simple_internal(avctx, frame, &discarded_samples);
531 if (ret < 0)
532 return ret;
533 }
534
535 return 0;
536 }
537
decode_receive_frame_internal(AVCodecContext * avctx,AVFrame * frame)538 static int decode_receive_frame_internal(AVCodecContext *avctx, AVFrame *frame)
539 {
540 AVCodecInternal *avci = avctx->internal;
541 int ret;
542
543 av_assert0(!frame->buf[0]);
544
545 if (avctx->codec->receive_frame) {
546 ret = avctx->codec->receive_frame(avctx, frame);
547 if (ret != AVERROR(EAGAIN))
548 av_packet_unref(avci->last_pkt_props);
549 } else
550 ret = decode_simple_receive_frame(avctx, frame);
551
552 if (ret == AVERROR_EOF)
553 avci->draining_done = 1;
554
555 if (!(avctx->codec->caps_internal & FF_CODEC_CAP_SETS_FRAME_PROPS) &&
556 IS_EMPTY(avci->last_pkt_props) && av_fifo_size(avci->pkt_props) >= sizeof(*avci->last_pkt_props))
557 av_fifo_generic_read(avci->pkt_props,
558 avci->last_pkt_props, sizeof(*avci->last_pkt_props), NULL);
559
560 if (!ret) {
561 frame->best_effort_timestamp = guess_correct_pts(avctx,
562 frame->pts,
563 frame->pkt_dts);
564
565 /* the only case where decode data is not set should be decoders
566 * that do not call ff_get_buffer() */
567 av_assert0((frame->private_ref && frame->private_ref->size == sizeof(FrameDecodeData)) ||
568 !(avctx->codec->capabilities & AV_CODEC_CAP_DR1));
569
570 if (frame->private_ref) {
571 FrameDecodeData *fdd = (FrameDecodeData*)frame->private_ref->data;
572
573 if (fdd->post_process) {
574 ret = fdd->post_process(avctx, frame);
575 if (ret < 0) {
576 av_frame_unref(frame);
577 return ret;
578 }
579 }
580 }
581 }
582
583 /* free the per-frame decode data */
584 av_buffer_unref(&frame->private_ref);
585
586 return ret;
587 }
588
avcodec_send_packet(AVCodecContext * avctx,const AVPacket * avpkt)589 int attribute_align_arg avcodec_send_packet(AVCodecContext *avctx, const AVPacket *avpkt)
590 {
591 AVCodecInternal *avci = avctx->internal;
592 int ret;
593
594 if (!avcodec_is_open(avctx) || !av_codec_is_decoder(avctx->codec))
595 return AVERROR(EINVAL);
596
597 if (avctx->internal->draining)
598 return AVERROR_EOF;
599
600 if (avpkt && !avpkt->size && avpkt->data)
601 return AVERROR(EINVAL);
602
603 av_packet_unref(avci->buffer_pkt);
604 if (avpkt && (avpkt->data || avpkt->side_data_elems)) {
605 ret = av_packet_ref(avci->buffer_pkt, avpkt);
606 if (ret < 0)
607 return ret;
608 }
609
610 ret = av_bsf_send_packet(avci->bsf, avci->buffer_pkt);
611 if (ret < 0) {
612 av_packet_unref(avci->buffer_pkt);
613 return ret;
614 }
615
616 if (!avci->buffer_frame->buf[0]) {
617 ret = decode_receive_frame_internal(avctx, avci->buffer_frame);
618 if (ret < 0 && ret != AVERROR(EAGAIN) && ret != AVERROR_EOF)
619 return ret;
620 }
621
622 return 0;
623 }
624
apply_cropping(AVCodecContext * avctx,AVFrame * frame)625 static int apply_cropping(AVCodecContext *avctx, AVFrame *frame)
626 {
627 /* make sure we are noisy about decoders returning invalid cropping data */
628 if (frame->crop_left >= INT_MAX - frame->crop_right ||
629 frame->crop_top >= INT_MAX - frame->crop_bottom ||
630 (frame->crop_left + frame->crop_right) >= frame->width ||
631 (frame->crop_top + frame->crop_bottom) >= frame->height) {
632 av_log(avctx, AV_LOG_WARNING,
633 "Invalid cropping information set by a decoder: "
634 "%"SIZE_SPECIFIER"/%"SIZE_SPECIFIER"/%"SIZE_SPECIFIER"/%"SIZE_SPECIFIER" "
635 "(frame size %dx%d). This is a bug, please report it\n",
636 frame->crop_left, frame->crop_right, frame->crop_top, frame->crop_bottom,
637 frame->width, frame->height);
638 frame->crop_left = 0;
639 frame->crop_right = 0;
640 frame->crop_top = 0;
641 frame->crop_bottom = 0;
642 return 0;
643 }
644
645 if (!avctx->apply_cropping)
646 return 0;
647
648 return av_frame_apply_cropping(frame, avctx->flags & AV_CODEC_FLAG_UNALIGNED ?
649 AV_FRAME_CROP_UNALIGNED : 0);
650 }
651
avcodec_receive_frame(AVCodecContext * avctx,AVFrame * frame)652 int attribute_align_arg avcodec_receive_frame(AVCodecContext *avctx, AVFrame *frame)
653 {
654 AVCodecInternal *avci = avctx->internal;
655 int ret, changed;
656
657 av_frame_unref(frame);
658
659 if (!avcodec_is_open(avctx) || !av_codec_is_decoder(avctx->codec))
660 return AVERROR(EINVAL);
661
662 if (avci->buffer_frame->buf[0]) {
663 av_frame_move_ref(frame, avci->buffer_frame);
664 } else {
665 ret = decode_receive_frame_internal(avctx, frame);
666 if (ret < 0)
667 return ret;
668 }
669
670 if (avctx->codec_type == AVMEDIA_TYPE_VIDEO) {
671 ret = apply_cropping(avctx, frame);
672 if (ret < 0) {
673 av_frame_unref(frame);
674 return ret;
675 }
676 }
677
678 avctx->frame_number++;
679
680 if (avctx->flags & AV_CODEC_FLAG_DROPCHANGED) {
681
682 if (avctx->frame_number == 1) {
683 avci->initial_format = frame->format;
684 switch(avctx->codec_type) {
685 case AVMEDIA_TYPE_VIDEO:
686 avci->initial_width = frame->width;
687 avci->initial_height = frame->height;
688 break;
689 case AVMEDIA_TYPE_AUDIO:
690 avci->initial_sample_rate = frame->sample_rate ? frame->sample_rate :
691 avctx->sample_rate;
692 avci->initial_channels = frame->channels;
693 avci->initial_channel_layout = frame->channel_layout;
694 break;
695 }
696 }
697
698 if (avctx->frame_number > 1) {
699 changed = avci->initial_format != frame->format;
700
701 switch(avctx->codec_type) {
702 case AVMEDIA_TYPE_VIDEO:
703 changed |= avci->initial_width != frame->width ||
704 avci->initial_height != frame->height;
705 break;
706 case AVMEDIA_TYPE_AUDIO:
707 changed |= avci->initial_sample_rate != frame->sample_rate ||
708 avci->initial_sample_rate != avctx->sample_rate ||
709 avci->initial_channels != frame->channels ||
710 avci->initial_channel_layout != frame->channel_layout;
711 break;
712 }
713
714 if (changed) {
715 avci->changed_frames_dropped++;
716 av_log(avctx, AV_LOG_INFO, "dropped changed frame #%d pts %"PRId64
717 " drop count: %d \n",
718 avctx->frame_number, frame->pts,
719 avci->changed_frames_dropped);
720 av_frame_unref(frame);
721 return AVERROR_INPUT_CHANGED;
722 }
723 }
724 }
725 return 0;
726 }
727
728 #if FF_API_OLD_ENCDEC
729 FF_DISABLE_DEPRECATION_WARNINGS
unrefcount_frame(AVCodecInternal * avci,AVFrame * frame)730 static int unrefcount_frame(AVCodecInternal *avci, AVFrame *frame)
731 {
732 int ret;
733
734 /* move the original frame to our backup */
735 av_frame_unref(avci->to_free);
736 av_frame_move_ref(avci->to_free, frame);
737
738 /* now copy everything except the AVBufferRefs back
739 * note that we make a COPY of the side data, so calling av_frame_free() on
740 * the caller's frame will work properly */
741 ret = av_frame_copy_props(frame, avci->to_free);
742 if (ret < 0)
743 return ret;
744
745 memcpy(frame->data, avci->to_free->data, sizeof(frame->data));
746 memcpy(frame->linesize, avci->to_free->linesize, sizeof(frame->linesize));
747 if (avci->to_free->extended_data != avci->to_free->data) {
748 int planes = avci->to_free->channels;
749 int size = planes * sizeof(*frame->extended_data);
750
751 if (!size) {
752 av_frame_unref(frame);
753 return AVERROR_BUG;
754 }
755
756 frame->extended_data = av_malloc(size);
757 if (!frame->extended_data) {
758 av_frame_unref(frame);
759 return AVERROR(ENOMEM);
760 }
761 memcpy(frame->extended_data, avci->to_free->extended_data,
762 size);
763 } else
764 frame->extended_data = frame->data;
765
766 frame->format = avci->to_free->format;
767 frame->width = avci->to_free->width;
768 frame->height = avci->to_free->height;
769 frame->channel_layout = avci->to_free->channel_layout;
770 frame->nb_samples = avci->to_free->nb_samples;
771 frame->channels = avci->to_free->channels;
772
773 return 0;
774 }
775
compat_decode(AVCodecContext * avctx,AVFrame * frame,int * got_frame,const AVPacket * pkt)776 static int compat_decode(AVCodecContext *avctx, AVFrame *frame,
777 int *got_frame, const AVPacket *pkt)
778 {
779 AVCodecInternal *avci = avctx->internal;
780 int ret = 0;
781
782 av_assert0(avci->compat_decode_consumed == 0);
783
784 if (avci->draining_done && pkt && pkt->size != 0) {
785 av_log(avctx, AV_LOG_WARNING, "Got unexpected packet after EOF\n");
786 avcodec_flush_buffers(avctx);
787 }
788
789 *got_frame = 0;
790
791 if (avci->compat_decode_partial_size > 0 &&
792 avci->compat_decode_partial_size != pkt->size) {
793 av_log(avctx, AV_LOG_ERROR,
794 "Got unexpected packet size after a partial decode\n");
795 ret = AVERROR(EINVAL);
796 goto finish;
797 }
798
799 if (!avci->compat_decode_partial_size) {
800 ret = avcodec_send_packet(avctx, pkt);
801 if (ret == AVERROR_EOF)
802 ret = 0;
803 else if (ret == AVERROR(EAGAIN)) {
804 /* we fully drain all the output in each decode call, so this should not
805 * ever happen */
806 ret = AVERROR_BUG;
807 goto finish;
808 } else if (ret < 0)
809 goto finish;
810 }
811
812 while (ret >= 0) {
813 ret = avcodec_receive_frame(avctx, frame);
814 if (ret < 0) {
815 if (ret == AVERROR(EAGAIN) || ret == AVERROR_EOF)
816 ret = 0;
817 goto finish;
818 }
819
820 if (frame != avci->compat_decode_frame) {
821 if (!avctx->refcounted_frames) {
822 ret = unrefcount_frame(avci, frame);
823 if (ret < 0)
824 goto finish;
825 }
826
827 *got_frame = 1;
828 frame = avci->compat_decode_frame;
829 } else {
830 if (!avci->compat_decode_warned) {
831 av_log(avctx, AV_LOG_WARNING, "The deprecated avcodec_decode_* "
832 "API cannot return all the frames for this decoder. "
833 "Some frames will be dropped. Update your code to the "
834 "new decoding API to fix this.\n");
835 avci->compat_decode_warned = 1;
836 }
837 }
838
839 if (avci->draining || (!avctx->codec->bsfs && avci->compat_decode_consumed < pkt->size))
840 break;
841 }
842
843 finish:
844 if (ret == 0) {
845 /* if there are any bsfs then assume full packet is always consumed */
846 if (avctx->codec->bsfs)
847 ret = pkt->size;
848 else
849 ret = FFMIN(avci->compat_decode_consumed, pkt->size);
850 }
851 avci->compat_decode_consumed = 0;
852 avci->compat_decode_partial_size = (ret >= 0) ? pkt->size - ret : 0;
853
854 return ret;
855 }
856
avcodec_decode_video2(AVCodecContext * avctx,AVFrame * picture,int * got_picture_ptr,const AVPacket * avpkt)857 int attribute_align_arg avcodec_decode_video2(AVCodecContext *avctx, AVFrame *picture,
858 int *got_picture_ptr,
859 const AVPacket *avpkt)
860 {
861 return compat_decode(avctx, picture, got_picture_ptr, avpkt);
862 }
863
avcodec_decode_audio4(AVCodecContext * avctx,AVFrame * frame,int * got_frame_ptr,const AVPacket * avpkt)864 int attribute_align_arg avcodec_decode_audio4(AVCodecContext *avctx,
865 AVFrame *frame,
866 int *got_frame_ptr,
867 const AVPacket *avpkt)
868 {
869 return compat_decode(avctx, frame, got_frame_ptr, avpkt);
870 }
871 FF_ENABLE_DEPRECATION_WARNINGS
872 #endif
873
get_subtitle_defaults(AVSubtitle * sub)874 static void get_subtitle_defaults(AVSubtitle *sub)
875 {
876 memset(sub, 0, sizeof(*sub));
877 sub->pts = AV_NOPTS_VALUE;
878 }
879
880 #define UTF8_MAX_BYTES 4 /* 5 and 6 bytes sequences should not be used */
recode_subtitle(AVCodecContext * avctx,AVPacket ** outpkt,AVPacket * inpkt,AVPacket * buf_pkt)881 static int recode_subtitle(AVCodecContext *avctx, AVPacket **outpkt,
882 AVPacket *inpkt, AVPacket *buf_pkt)
883 {
884 #if CONFIG_ICONV
885 iconv_t cd = (iconv_t)-1;
886 int ret = 0;
887 char *inb, *outb;
888 size_t inl, outl;
889 #endif
890
891 if (avctx->sub_charenc_mode != FF_SUB_CHARENC_MODE_PRE_DECODER || inpkt->size == 0) {
892 *outpkt = inpkt;
893 return 0;
894 }
895
896 #if CONFIG_ICONV
897 inb = inpkt->data;
898 inl = inpkt->size;
899
900 if (inl >= INT_MAX / UTF8_MAX_BYTES - AV_INPUT_BUFFER_PADDING_SIZE) {
901 av_log(avctx, AV_LOG_ERROR, "Subtitles packet is too big for recoding\n");
902 return AVERROR(ERANGE);
903 }
904
905 cd = iconv_open("UTF-8", avctx->sub_charenc);
906 av_assert0(cd != (iconv_t)-1);
907
908 ret = av_new_packet(buf_pkt, inl * UTF8_MAX_BYTES);
909 if (ret < 0)
910 goto end;
911 ret = av_packet_copy_props(buf_pkt, inpkt);
912 if (ret < 0)
913 goto end;
914 outb = buf_pkt->data;
915 outl = buf_pkt->size;
916
917 if (iconv(cd, &inb, &inl, &outb, &outl) == (size_t)-1 ||
918 iconv(cd, NULL, NULL, &outb, &outl) == (size_t)-1 ||
919 outl >= buf_pkt->size || inl != 0) {
920 ret = FFMIN(AVERROR(errno), -1);
921 av_log(avctx, AV_LOG_ERROR, "Unable to recode subtitle event \"%s\" "
922 "from %s to UTF-8\n", inpkt->data, avctx->sub_charenc);
923 goto end;
924 }
925 buf_pkt->size -= outl;
926 memset(buf_pkt->data + buf_pkt->size, 0, outl);
927 *outpkt = buf_pkt;
928
929 ret = 0;
930 end:
931 if (ret < 0)
932 av_packet_unref(buf_pkt);
933 if (cd != (iconv_t)-1)
934 iconv_close(cd);
935 return ret;
936 #else
937 av_log(avctx, AV_LOG_ERROR, "requesting subtitles recoding without iconv");
938 return AVERROR(EINVAL);
939 #endif
940 }
941
utf8_check(const uint8_t * str)942 static int utf8_check(const uint8_t *str)
943 {
944 const uint8_t *byte;
945 uint32_t codepoint, min;
946
947 while (*str) {
948 byte = str;
949 GET_UTF8(codepoint, *(byte++), return 0;);
950 min = byte - str == 1 ? 0 : byte - str == 2 ? 0x80 :
951 1 << (5 * (byte - str) - 4);
952 if (codepoint < min || codepoint >= 0x110000 ||
953 codepoint == 0xFFFE /* BOM */ ||
954 codepoint >= 0xD800 && codepoint <= 0xDFFF /* surrogates */)
955 return 0;
956 str = byte;
957 }
958 return 1;
959 }
960
961 #if FF_API_ASS_TIMING
insert_ts(AVBPrint * buf,int ts)962 static void insert_ts(AVBPrint *buf, int ts)
963 {
964 if (ts == -1) {
965 av_bprintf(buf, "9:59:59.99,");
966 } else {
967 int h, m, s;
968
969 h = ts/360000; ts -= 360000*h;
970 m = ts/ 6000; ts -= 6000*m;
971 s = ts/ 100; ts -= 100*s;
972 av_bprintf(buf, "%d:%02d:%02d.%02d,", h, m, s, ts);
973 }
974 }
975
convert_sub_to_old_ass_form(AVSubtitle * sub,const AVPacket * pkt,AVRational tb)976 static int convert_sub_to_old_ass_form(AVSubtitle *sub, const AVPacket *pkt, AVRational tb)
977 {
978 int i;
979 AVBPrint buf;
980
981 av_bprint_init(&buf, 0, AV_BPRINT_SIZE_UNLIMITED);
982
983 for (i = 0; i < sub->num_rects; i++) {
984 char *final_dialog;
985 const char *dialog;
986 AVSubtitleRect *rect = sub->rects[i];
987 int ts_start, ts_duration = -1;
988 long int layer;
989
990 if (rect->type != SUBTITLE_ASS || !strncmp(rect->ass, "Dialogue: ", 10))
991 continue;
992
993 av_bprint_clear(&buf);
994
995 /* skip ReadOrder */
996 dialog = strchr(rect->ass, ',');
997 if (!dialog)
998 continue;
999 dialog++;
1000
1001 /* extract Layer or Marked */
1002 layer = strtol(dialog, (char**)&dialog, 10);
1003 if (*dialog != ',')
1004 continue;
1005 dialog++;
1006
1007 /* rescale timing to ASS time base (ms) */
1008 ts_start = av_rescale_q(pkt->pts, tb, av_make_q(1, 100));
1009 if (pkt->duration != -1)
1010 ts_duration = av_rescale_q(pkt->duration, tb, av_make_q(1, 100));
1011 sub->end_display_time = FFMAX(sub->end_display_time, 10 * ts_duration);
1012
1013 /* construct ASS (standalone file form with timestamps) string */
1014 av_bprintf(&buf, "Dialogue: %ld,", layer);
1015 insert_ts(&buf, ts_start);
1016 insert_ts(&buf, ts_duration == -1 ? -1 : ts_start + ts_duration);
1017 av_bprintf(&buf, "%s\r\n", dialog);
1018
1019 final_dialog = av_strdup(buf.str);
1020 if (!av_bprint_is_complete(&buf) || !final_dialog) {
1021 av_freep(&final_dialog);
1022 av_bprint_finalize(&buf, NULL);
1023 return AVERROR(ENOMEM);
1024 }
1025 av_freep(&rect->ass);
1026 rect->ass = final_dialog;
1027 }
1028
1029 av_bprint_finalize(&buf, NULL);
1030 return 0;
1031 }
1032 #endif
1033
avcodec_decode_subtitle2(AVCodecContext * avctx,AVSubtitle * sub,int * got_sub_ptr,AVPacket * avpkt)1034 int avcodec_decode_subtitle2(AVCodecContext *avctx, AVSubtitle *sub,
1035 int *got_sub_ptr,
1036 AVPacket *avpkt)
1037 {
1038 int ret = 0;
1039
1040 if (!avpkt->data && avpkt->size) {
1041 av_log(avctx, AV_LOG_ERROR, "invalid packet: NULL data, size != 0\n");
1042 return AVERROR(EINVAL);
1043 }
1044 if (!avctx->codec)
1045 return AVERROR(EINVAL);
1046 if (avctx->codec->type != AVMEDIA_TYPE_SUBTITLE) {
1047 av_log(avctx, AV_LOG_ERROR, "Invalid media type for subtitles\n");
1048 return AVERROR(EINVAL);
1049 }
1050
1051 *got_sub_ptr = 0;
1052 get_subtitle_defaults(sub);
1053
1054 if ((avctx->codec->capabilities & AV_CODEC_CAP_DELAY) || avpkt->size) {
1055 AVCodecInternal *avci = avctx->internal;
1056 AVPacket *pkt;
1057
1058 ret = recode_subtitle(avctx, &pkt, avpkt, avci->buffer_pkt);
1059 if (ret < 0)
1060 return ret;
1061
1062 if (avctx->pkt_timebase.num && avpkt->pts != AV_NOPTS_VALUE)
1063 sub->pts = av_rescale_q(avpkt->pts,
1064 avctx->pkt_timebase, AV_TIME_BASE_Q);
1065 ret = avctx->codec->decode(avctx, sub, got_sub_ptr, pkt);
1066 av_assert1((ret >= 0) >= !!*got_sub_ptr &&
1067 !!*got_sub_ptr >= !!sub->num_rects);
1068
1069 #if FF_API_ASS_TIMING
1070 if (avctx->sub_text_format == FF_SUB_TEXT_FMT_ASS_WITH_TIMINGS
1071 && *got_sub_ptr && sub->num_rects) {
1072 const AVRational tb = avctx->pkt_timebase.num ? avctx->pkt_timebase
1073 : avctx->time_base;
1074 int err = convert_sub_to_old_ass_form(sub, avpkt, tb);
1075 if (err < 0)
1076 ret = err;
1077 }
1078 #endif
1079
1080 if (sub->num_rects && !sub->end_display_time && avpkt->duration &&
1081 avctx->pkt_timebase.num) {
1082 AVRational ms = { 1, 1000 };
1083 sub->end_display_time = av_rescale_q(avpkt->duration,
1084 avctx->pkt_timebase, ms);
1085 }
1086
1087 if (avctx->codec_descriptor->props & AV_CODEC_PROP_BITMAP_SUB)
1088 sub->format = 0;
1089 else if (avctx->codec_descriptor->props & AV_CODEC_PROP_TEXT_SUB)
1090 sub->format = 1;
1091
1092 for (unsigned i = 0; i < sub->num_rects; i++) {
1093 if (avctx->sub_charenc_mode != FF_SUB_CHARENC_MODE_IGNORE &&
1094 sub->rects[i]->ass && !utf8_check(sub->rects[i]->ass)) {
1095 av_log(avctx, AV_LOG_ERROR,
1096 "Invalid UTF-8 in decoded subtitles text; "
1097 "maybe missing -sub_charenc option\n");
1098 avsubtitle_free(sub);
1099 ret = AVERROR_INVALIDDATA;
1100 break;
1101 }
1102 }
1103
1104 if (*got_sub_ptr)
1105 avctx->frame_number++;
1106
1107 if (pkt == avci->buffer_pkt) // did we recode?
1108 av_packet_unref(avci->buffer_pkt);
1109 }
1110
1111 return ret;
1112 }
1113
avcodec_default_get_format(struct AVCodecContext * avctx,const enum AVPixelFormat * fmt)1114 enum AVPixelFormat avcodec_default_get_format(struct AVCodecContext *avctx,
1115 const enum AVPixelFormat *fmt)
1116 {
1117 const AVPixFmtDescriptor *desc;
1118 const AVCodecHWConfig *config;
1119 int i, n;
1120
1121 // If a device was supplied when the codec was opened, assume that the
1122 // user wants to use it.
1123 if (avctx->hw_device_ctx && avctx->codec->hw_configs) {
1124 AVHWDeviceContext *device_ctx =
1125 (AVHWDeviceContext*)avctx->hw_device_ctx->data;
1126 for (i = 0;; i++) {
1127 config = &avctx->codec->hw_configs[i]->public;
1128 if (!config)
1129 break;
1130 if (!(config->methods &
1131 AV_CODEC_HW_CONFIG_METHOD_HW_DEVICE_CTX))
1132 continue;
1133 if (device_ctx->type != config->device_type)
1134 continue;
1135 for (n = 0; fmt[n] != AV_PIX_FMT_NONE; n++) {
1136 if (config->pix_fmt == fmt[n])
1137 return fmt[n];
1138 }
1139 }
1140 }
1141 // No device or other setup, so we have to choose from things which
1142 // don't any other external information.
1143
1144 // If the last element of the list is a software format, choose it
1145 // (this should be best software format if any exist).
1146 for (n = 0; fmt[n] != AV_PIX_FMT_NONE; n++);
1147 desc = av_pix_fmt_desc_get(fmt[n - 1]);
1148 if (!(desc->flags & AV_PIX_FMT_FLAG_HWACCEL))
1149 return fmt[n - 1];
1150
1151 // Finally, traverse the list in order and choose the first entry
1152 // with no external dependencies (if there is no hardware configuration
1153 // information available then this just picks the first entry).
1154 for (n = 0; fmt[n] != AV_PIX_FMT_NONE; n++) {
1155 for (i = 0;; i++) {
1156 config = avcodec_get_hw_config(avctx->codec, i);
1157 if (!config)
1158 break;
1159 if (config->pix_fmt == fmt[n])
1160 break;
1161 }
1162 if (!config) {
1163 // No specific config available, so the decoder must be able
1164 // to handle this format without any additional setup.
1165 return fmt[n];
1166 }
1167 if (config->methods & AV_CODEC_HW_CONFIG_METHOD_INTERNAL) {
1168 // Usable with only internal setup.
1169 return fmt[n];
1170 }
1171 }
1172
1173 // Nothing is usable, give up.
1174 return AV_PIX_FMT_NONE;
1175 }
1176
ff_decode_get_hw_frames_ctx(AVCodecContext * avctx,enum AVHWDeviceType dev_type)1177 int ff_decode_get_hw_frames_ctx(AVCodecContext *avctx,
1178 enum AVHWDeviceType dev_type)
1179 {
1180 AVHWDeviceContext *device_ctx;
1181 AVHWFramesContext *frames_ctx;
1182 int ret;
1183
1184 if (!avctx->hwaccel)
1185 return AVERROR(ENOSYS);
1186
1187 if (avctx->hw_frames_ctx)
1188 return 0;
1189 if (!avctx->hw_device_ctx) {
1190 av_log(avctx, AV_LOG_ERROR, "A hardware frames or device context is "
1191 "required for hardware accelerated decoding.\n");
1192 return AVERROR(EINVAL);
1193 }
1194
1195 device_ctx = (AVHWDeviceContext *)avctx->hw_device_ctx->data;
1196 if (device_ctx->type != dev_type) {
1197 av_log(avctx, AV_LOG_ERROR, "Device type %s expected for hardware "
1198 "decoding, but got %s.\n", av_hwdevice_get_type_name(dev_type),
1199 av_hwdevice_get_type_name(device_ctx->type));
1200 return AVERROR(EINVAL);
1201 }
1202
1203 ret = avcodec_get_hw_frames_parameters(avctx,
1204 avctx->hw_device_ctx,
1205 avctx->hwaccel->pix_fmt,
1206 &avctx->hw_frames_ctx);
1207 if (ret < 0)
1208 return ret;
1209
1210 frames_ctx = (AVHWFramesContext*)avctx->hw_frames_ctx->data;
1211
1212
1213 if (frames_ctx->initial_pool_size) {
1214 // We guarantee 4 base work surfaces. The function above guarantees 1
1215 // (the absolute minimum), so add the missing count.
1216 frames_ctx->initial_pool_size += 3;
1217 }
1218
1219 ret = av_hwframe_ctx_init(avctx->hw_frames_ctx);
1220 if (ret < 0) {
1221 av_buffer_unref(&avctx->hw_frames_ctx);
1222 return ret;
1223 }
1224
1225 return 0;
1226 }
1227
avcodec_get_hw_frames_parameters(AVCodecContext * avctx,AVBufferRef * device_ref,enum AVPixelFormat hw_pix_fmt,AVBufferRef ** out_frames_ref)1228 int avcodec_get_hw_frames_parameters(AVCodecContext *avctx,
1229 AVBufferRef *device_ref,
1230 enum AVPixelFormat hw_pix_fmt,
1231 AVBufferRef **out_frames_ref)
1232 {
1233 AVBufferRef *frames_ref = NULL;
1234 const AVCodecHWConfigInternal *hw_config;
1235 const AVHWAccel *hwa;
1236 int i, ret;
1237
1238 for (i = 0;; i++) {
1239 hw_config = avctx->codec->hw_configs[i];
1240 if (!hw_config)
1241 return AVERROR(ENOENT);
1242 if (hw_config->public.pix_fmt == hw_pix_fmt)
1243 break;
1244 }
1245
1246 hwa = hw_config->hwaccel;
1247 if (!hwa || !hwa->frame_params)
1248 return AVERROR(ENOENT);
1249
1250 frames_ref = av_hwframe_ctx_alloc(device_ref);
1251 if (!frames_ref)
1252 return AVERROR(ENOMEM);
1253
1254 ret = hwa->frame_params(avctx, frames_ref);
1255 if (ret >= 0) {
1256 AVHWFramesContext *frames_ctx = (AVHWFramesContext*)frames_ref->data;
1257
1258 if (frames_ctx->initial_pool_size) {
1259 // If the user has requested that extra output surfaces be
1260 // available then add them here.
1261 if (avctx->extra_hw_frames > 0)
1262 frames_ctx->initial_pool_size += avctx->extra_hw_frames;
1263
1264 // If frame threading is enabled then an extra surface per thread
1265 // is also required.
1266 if (avctx->active_thread_type & FF_THREAD_FRAME)
1267 frames_ctx->initial_pool_size += avctx->thread_count;
1268 }
1269
1270 *out_frames_ref = frames_ref;
1271 } else {
1272 av_buffer_unref(&frames_ref);
1273 }
1274 return ret;
1275 }
1276
hwaccel_init(AVCodecContext * avctx,const AVCodecHWConfigInternal * hw_config)1277 static int hwaccel_init(AVCodecContext *avctx,
1278 const AVCodecHWConfigInternal *hw_config)
1279 {
1280 const AVHWAccel *hwaccel;
1281 int err;
1282
1283 hwaccel = hw_config->hwaccel;
1284 if (hwaccel->capabilities & AV_HWACCEL_CODEC_CAP_EXPERIMENTAL &&
1285 avctx->strict_std_compliance > FF_COMPLIANCE_EXPERIMENTAL) {
1286 av_log(avctx, AV_LOG_WARNING, "Ignoring experimental hwaccel: %s\n",
1287 hwaccel->name);
1288 return AVERROR_PATCHWELCOME;
1289 }
1290
1291 if (hwaccel->priv_data_size) {
1292 avctx->internal->hwaccel_priv_data =
1293 av_mallocz(hwaccel->priv_data_size);
1294 if (!avctx->internal->hwaccel_priv_data)
1295 return AVERROR(ENOMEM);
1296 }
1297
1298 avctx->hwaccel = hwaccel;
1299 if (hwaccel->init) {
1300 err = hwaccel->init(avctx);
1301 if (err < 0) {
1302 av_log(avctx, AV_LOG_ERROR, "Failed setup for format %s: "
1303 "hwaccel initialisation returned error.\n",
1304 av_get_pix_fmt_name(hw_config->public.pix_fmt));
1305 av_freep(&avctx->internal->hwaccel_priv_data);
1306 avctx->hwaccel = NULL;
1307 return err;
1308 }
1309 }
1310
1311 return 0;
1312 }
1313
hwaccel_uninit(AVCodecContext * avctx)1314 static void hwaccel_uninit(AVCodecContext *avctx)
1315 {
1316 if (avctx->hwaccel && avctx->hwaccel->uninit)
1317 avctx->hwaccel->uninit(avctx);
1318
1319 av_freep(&avctx->internal->hwaccel_priv_data);
1320
1321 avctx->hwaccel = NULL;
1322
1323 av_buffer_unref(&avctx->hw_frames_ctx);
1324 }
1325
ff_get_format(AVCodecContext * avctx,const enum AVPixelFormat * fmt)1326 int ff_get_format(AVCodecContext *avctx, const enum AVPixelFormat *fmt)
1327 {
1328 const AVPixFmtDescriptor *desc;
1329 enum AVPixelFormat *choices;
1330 enum AVPixelFormat ret, user_choice;
1331 const AVCodecHWConfigInternal *hw_config;
1332 const AVCodecHWConfig *config;
1333 int i, n, err;
1334
1335 // Find end of list.
1336 for (n = 0; fmt[n] != AV_PIX_FMT_NONE; n++);
1337 // Must contain at least one entry.
1338 av_assert0(n >= 1);
1339 // If a software format is available, it must be the last entry.
1340 desc = av_pix_fmt_desc_get(fmt[n - 1]);
1341 if (desc->flags & AV_PIX_FMT_FLAG_HWACCEL) {
1342 // No software format is available.
1343 } else {
1344 avctx->sw_pix_fmt = fmt[n - 1];
1345 }
1346
1347 choices = av_malloc_array(n + 1, sizeof(*choices));
1348 if (!choices)
1349 return AV_PIX_FMT_NONE;
1350
1351 memcpy(choices, fmt, (n + 1) * sizeof(*choices));
1352
1353 for (;;) {
1354 // Remove the previous hwaccel, if there was one.
1355 hwaccel_uninit(avctx);
1356
1357 user_choice = avctx->get_format(avctx, choices);
1358 if (user_choice == AV_PIX_FMT_NONE) {
1359 // Explicitly chose nothing, give up.
1360 ret = AV_PIX_FMT_NONE;
1361 break;
1362 }
1363
1364 desc = av_pix_fmt_desc_get(user_choice);
1365 if (!desc) {
1366 av_log(avctx, AV_LOG_ERROR, "Invalid format returned by "
1367 "get_format() callback.\n");
1368 ret = AV_PIX_FMT_NONE;
1369 break;
1370 }
1371 av_log(avctx, AV_LOG_DEBUG, "Format %s chosen by get_format().\n",
1372 desc->name);
1373
1374 for (i = 0; i < n; i++) {
1375 if (choices[i] == user_choice)
1376 break;
1377 }
1378 if (i == n) {
1379 av_log(avctx, AV_LOG_ERROR, "Invalid return from get_format(): "
1380 "%s not in possible list.\n", desc->name);
1381 ret = AV_PIX_FMT_NONE;
1382 break;
1383 }
1384
1385 if (avctx->codec->hw_configs) {
1386 for (i = 0;; i++) {
1387 hw_config = avctx->codec->hw_configs[i];
1388 if (!hw_config)
1389 break;
1390 if (hw_config->public.pix_fmt == user_choice)
1391 break;
1392 }
1393 } else {
1394 hw_config = NULL;
1395 }
1396
1397 if (!hw_config) {
1398 // No config available, so no extra setup required.
1399 ret = user_choice;
1400 break;
1401 }
1402 config = &hw_config->public;
1403
1404 if (config->methods &
1405 AV_CODEC_HW_CONFIG_METHOD_HW_FRAMES_CTX &&
1406 avctx->hw_frames_ctx) {
1407 const AVHWFramesContext *frames_ctx =
1408 (AVHWFramesContext*)avctx->hw_frames_ctx->data;
1409 if (frames_ctx->format != user_choice) {
1410 av_log(avctx, AV_LOG_ERROR, "Invalid setup for format %s: "
1411 "does not match the format of the provided frames "
1412 "context.\n", desc->name);
1413 goto try_again;
1414 }
1415 } else if (config->methods &
1416 AV_CODEC_HW_CONFIG_METHOD_HW_DEVICE_CTX &&
1417 avctx->hw_device_ctx) {
1418 const AVHWDeviceContext *device_ctx =
1419 (AVHWDeviceContext*)avctx->hw_device_ctx->data;
1420 if (device_ctx->type != config->device_type) {
1421 av_log(avctx, AV_LOG_ERROR, "Invalid setup for format %s: "
1422 "does not match the type of the provided device "
1423 "context.\n", desc->name);
1424 goto try_again;
1425 }
1426 } else if (config->methods &
1427 AV_CODEC_HW_CONFIG_METHOD_INTERNAL) {
1428 // Internal-only setup, no additional configuration.
1429 } else if (config->methods &
1430 AV_CODEC_HW_CONFIG_METHOD_AD_HOC) {
1431 // Some ad-hoc configuration we can't see and can't check.
1432 } else {
1433 av_log(avctx, AV_LOG_ERROR, "Invalid setup for format %s: "
1434 "missing configuration.\n", desc->name);
1435 goto try_again;
1436 }
1437 if (hw_config->hwaccel) {
1438 av_log(avctx, AV_LOG_DEBUG, "Format %s requires hwaccel "
1439 "initialisation.\n", desc->name);
1440 err = hwaccel_init(avctx, hw_config);
1441 if (err < 0)
1442 goto try_again;
1443 }
1444 ret = user_choice;
1445 break;
1446
1447 try_again:
1448 av_log(avctx, AV_LOG_DEBUG, "Format %s not usable, retrying "
1449 "get_format() without it.\n", desc->name);
1450 for (i = 0; i < n; i++) {
1451 if (choices[i] == user_choice)
1452 break;
1453 }
1454 for (; i + 1 < n; i++)
1455 choices[i] = choices[i + 1];
1456 --n;
1457 }
1458
1459 av_freep(&choices);
1460 return ret;
1461 }
1462
frame_pool_free(void * opaque,uint8_t * data)1463 static void frame_pool_free(void *opaque, uint8_t *data)
1464 {
1465 FramePool *pool = (FramePool*)data;
1466 int i;
1467
1468 for (i = 0; i < FF_ARRAY_ELEMS(pool->pools); i++)
1469 av_buffer_pool_uninit(&pool->pools[i]);
1470
1471 av_freep(&data);
1472 }
1473
frame_pool_alloc(void)1474 static AVBufferRef *frame_pool_alloc(void)
1475 {
1476 FramePool *pool = av_mallocz(sizeof(*pool));
1477 AVBufferRef *buf;
1478
1479 if (!pool)
1480 return NULL;
1481
1482 buf = av_buffer_create((uint8_t*)pool, sizeof(*pool),
1483 frame_pool_free, NULL, 0);
1484 if (!buf) {
1485 av_freep(&pool);
1486 return NULL;
1487 }
1488
1489 return buf;
1490 }
1491
update_frame_pool(AVCodecContext * avctx,AVFrame * frame)1492 static int update_frame_pool(AVCodecContext *avctx, AVFrame *frame)
1493 {
1494 FramePool *pool = avctx->internal->pool ?
1495 (FramePool*)avctx->internal->pool->data : NULL;
1496 AVBufferRef *pool_buf;
1497 int i, ret, ch, planes;
1498
1499 if (avctx->codec_type == AVMEDIA_TYPE_AUDIO) {
1500 int planar = av_sample_fmt_is_planar(frame->format);
1501 ch = frame->channels;
1502 planes = planar ? ch : 1;
1503 }
1504
1505 if (pool && pool->format == frame->format) {
1506 if (avctx->codec_type == AVMEDIA_TYPE_VIDEO &&
1507 pool->width == frame->width && pool->height == frame->height)
1508 return 0;
1509 if (avctx->codec_type == AVMEDIA_TYPE_AUDIO && pool->planes == planes &&
1510 pool->channels == ch && frame->nb_samples == pool->samples)
1511 return 0;
1512 }
1513
1514 pool_buf = frame_pool_alloc();
1515 if (!pool_buf)
1516 return AVERROR(ENOMEM);
1517 pool = (FramePool*)pool_buf->data;
1518
1519 switch (avctx->codec_type) {
1520 case AVMEDIA_TYPE_VIDEO: {
1521 int linesize[4];
1522 int w = frame->width;
1523 int h = frame->height;
1524 int unaligned;
1525 ptrdiff_t linesize1[4];
1526 size_t size[4];
1527
1528 avcodec_align_dimensions2(avctx, &w, &h, pool->stride_align);
1529
1530 do {
1531 // NOTE: do not align linesizes individually, this breaks e.g. assumptions
1532 // that linesize[0] == 2*linesize[1] in the MPEG-encoder for 4:2:2
1533 ret = av_image_fill_linesizes(linesize, avctx->pix_fmt, w);
1534 if (ret < 0)
1535 goto fail;
1536 // increase alignment of w for next try (rhs gives the lowest bit set in w)
1537 w += w & ~(w - 1);
1538
1539 unaligned = 0;
1540 for (i = 0; i < 4; i++)
1541 unaligned |= linesize[i] % pool->stride_align[i];
1542 } while (unaligned);
1543
1544 for (i = 0; i < 4; i++)
1545 linesize1[i] = linesize[i];
1546 ret = av_image_fill_plane_sizes(size, avctx->pix_fmt, h, linesize1);
1547 if (ret < 0)
1548 goto fail;
1549
1550 for (i = 0; i < 4; i++) {
1551 pool->linesize[i] = linesize[i];
1552 if (size[i]) {
1553 if (size[i] > INT_MAX - (16 + STRIDE_ALIGN - 1)) {
1554 ret = AVERROR(EINVAL);
1555 goto fail;
1556 }
1557 pool->pools[i] = av_buffer_pool_init(size[i] + 16 + STRIDE_ALIGN - 1,
1558 CONFIG_MEMORY_POISONING ?
1559 NULL :
1560 av_buffer_allocz);
1561 if (!pool->pools[i]) {
1562 ret = AVERROR(ENOMEM);
1563 goto fail;
1564 }
1565 }
1566 }
1567 pool->format = frame->format;
1568 pool->width = frame->width;
1569 pool->height = frame->height;
1570
1571 break;
1572 }
1573 case AVMEDIA_TYPE_AUDIO: {
1574 ret = av_samples_get_buffer_size(&pool->linesize[0], ch,
1575 frame->nb_samples, frame->format, 0);
1576 if (ret < 0)
1577 goto fail;
1578
1579 pool->pools[0] = av_buffer_pool_init(pool->linesize[0], NULL);
1580 if (!pool->pools[0]) {
1581 ret = AVERROR(ENOMEM);
1582 goto fail;
1583 }
1584
1585 pool->format = frame->format;
1586 pool->planes = planes;
1587 pool->channels = ch;
1588 pool->samples = frame->nb_samples;
1589 break;
1590 }
1591 default: av_assert0(0);
1592 }
1593
1594 av_buffer_unref(&avctx->internal->pool);
1595 avctx->internal->pool = pool_buf;
1596
1597 return 0;
1598 fail:
1599 av_buffer_unref(&pool_buf);
1600 return ret;
1601 }
1602
audio_get_buffer(AVCodecContext * avctx,AVFrame * frame)1603 static int audio_get_buffer(AVCodecContext *avctx, AVFrame *frame)
1604 {
1605 FramePool *pool = (FramePool*)avctx->internal->pool->data;
1606 int planes = pool->planes;
1607 int i;
1608
1609 frame->linesize[0] = pool->linesize[0];
1610
1611 if (planes > AV_NUM_DATA_POINTERS) {
1612 frame->extended_data = av_mallocz_array(planes, sizeof(*frame->extended_data));
1613 frame->nb_extended_buf = planes - AV_NUM_DATA_POINTERS;
1614 frame->extended_buf = av_mallocz_array(frame->nb_extended_buf,
1615 sizeof(*frame->extended_buf));
1616 if (!frame->extended_data || !frame->extended_buf) {
1617 av_freep(&frame->extended_data);
1618 av_freep(&frame->extended_buf);
1619 return AVERROR(ENOMEM);
1620 }
1621 } else {
1622 frame->extended_data = frame->data;
1623 av_assert0(frame->nb_extended_buf == 0);
1624 }
1625
1626 for (i = 0; i < FFMIN(planes, AV_NUM_DATA_POINTERS); i++) {
1627 frame->buf[i] = av_buffer_pool_get(pool->pools[0]);
1628 if (!frame->buf[i])
1629 goto fail;
1630 frame->extended_data[i] = frame->data[i] = frame->buf[i]->data;
1631 }
1632 for (i = 0; i < frame->nb_extended_buf; i++) {
1633 frame->extended_buf[i] = av_buffer_pool_get(pool->pools[0]);
1634 if (!frame->extended_buf[i])
1635 goto fail;
1636 frame->extended_data[i + AV_NUM_DATA_POINTERS] = frame->extended_buf[i]->data;
1637 }
1638
1639 if (avctx->debug & FF_DEBUG_BUFFERS)
1640 av_log(avctx, AV_LOG_DEBUG, "default_get_buffer called on frame %p", frame);
1641
1642 return 0;
1643 fail:
1644 av_frame_unref(frame);
1645 return AVERROR(ENOMEM);
1646 }
1647
video_get_buffer(AVCodecContext * s,AVFrame * pic)1648 static int video_get_buffer(AVCodecContext *s, AVFrame *pic)
1649 {
1650 FramePool *pool = (FramePool*)s->internal->pool->data;
1651 const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(pic->format);
1652 int i;
1653
1654 if (pic->data[0] || pic->data[1] || pic->data[2] || pic->data[3]) {
1655 av_log(s, AV_LOG_ERROR, "pic->data[*]!=NULL in avcodec_default_get_buffer\n");
1656 return -1;
1657 }
1658
1659 if (!desc) {
1660 av_log(s, AV_LOG_ERROR,
1661 "Unable to get pixel format descriptor for format %s\n",
1662 av_get_pix_fmt_name(pic->format));
1663 return AVERROR(EINVAL);
1664 }
1665
1666 memset(pic->data, 0, sizeof(pic->data));
1667 pic->extended_data = pic->data;
1668
1669 for (i = 0; i < 4 && pool->pools[i]; i++) {
1670 pic->linesize[i] = pool->linesize[i];
1671
1672 pic->buf[i] = av_buffer_pool_get(pool->pools[i]);
1673 if (!pic->buf[i])
1674 goto fail;
1675
1676 pic->data[i] = pic->buf[i]->data;
1677 }
1678 for (; i < AV_NUM_DATA_POINTERS; i++) {
1679 pic->data[i] = NULL;
1680 pic->linesize[i] = 0;
1681 }
1682 if (desc->flags & AV_PIX_FMT_FLAG_PAL ||
1683 ((desc->flags & FF_PSEUDOPAL) && pic->data[1]))
1684 avpriv_set_systematic_pal2((uint32_t *)pic->data[1], pic->format);
1685
1686 if (s->debug & FF_DEBUG_BUFFERS)
1687 av_log(s, AV_LOG_DEBUG, "default_get_buffer called on pic %p\n", pic);
1688
1689 return 0;
1690 fail:
1691 av_frame_unref(pic);
1692 return AVERROR(ENOMEM);
1693 }
1694
avcodec_default_get_buffer2(AVCodecContext * avctx,AVFrame * frame,int flags)1695 int avcodec_default_get_buffer2(AVCodecContext *avctx, AVFrame *frame, int flags)
1696 {
1697 int ret;
1698
1699 if (avctx->hw_frames_ctx) {
1700 ret = av_hwframe_get_buffer(avctx->hw_frames_ctx, frame, 0);
1701 frame->width = avctx->coded_width;
1702 frame->height = avctx->coded_height;
1703 return ret;
1704 }
1705
1706 if ((ret = update_frame_pool(avctx, frame)) < 0)
1707 return ret;
1708
1709 switch (avctx->codec_type) {
1710 case AVMEDIA_TYPE_VIDEO:
1711 return video_get_buffer(avctx, frame);
1712 case AVMEDIA_TYPE_AUDIO:
1713 return audio_get_buffer(avctx, frame);
1714 default:
1715 return -1;
1716 }
1717 }
1718
add_metadata_from_side_data(const AVPacket * avpkt,AVFrame * frame)1719 static int add_metadata_from_side_data(const AVPacket *avpkt, AVFrame *frame)
1720 {
1721 buffer_size_t size;
1722 const uint8_t *side_metadata;
1723
1724 AVDictionary **frame_md = &frame->metadata;
1725
1726 side_metadata = av_packet_get_side_data(avpkt,
1727 AV_PKT_DATA_STRINGS_METADATA, &size);
1728 return av_packet_unpack_dictionary(side_metadata, size, frame_md);
1729 }
1730
ff_decode_frame_props(AVCodecContext * avctx,AVFrame * frame)1731 int ff_decode_frame_props(AVCodecContext *avctx, AVFrame *frame)
1732 {
1733 AVPacket *pkt = avctx->internal->last_pkt_props;
1734 static const struct {
1735 enum AVPacketSideDataType packet;
1736 enum AVFrameSideDataType frame;
1737 } sd[] = {
1738 { AV_PKT_DATA_REPLAYGAIN , AV_FRAME_DATA_REPLAYGAIN },
1739 { AV_PKT_DATA_DISPLAYMATRIX, AV_FRAME_DATA_DISPLAYMATRIX },
1740 { AV_PKT_DATA_SPHERICAL, AV_FRAME_DATA_SPHERICAL },
1741 { AV_PKT_DATA_STEREO3D, AV_FRAME_DATA_STEREO3D },
1742 { AV_PKT_DATA_AUDIO_SERVICE_TYPE, AV_FRAME_DATA_AUDIO_SERVICE_TYPE },
1743 { AV_PKT_DATA_MASTERING_DISPLAY_METADATA, AV_FRAME_DATA_MASTERING_DISPLAY_METADATA },
1744 { AV_PKT_DATA_CONTENT_LIGHT_LEVEL, AV_FRAME_DATA_CONTENT_LIGHT_LEVEL },
1745 { AV_PKT_DATA_A53_CC, AV_FRAME_DATA_A53_CC },
1746 { AV_PKT_DATA_ICC_PROFILE, AV_FRAME_DATA_ICC_PROFILE },
1747 { AV_PKT_DATA_S12M_TIMECODE, AV_FRAME_DATA_S12M_TIMECODE },
1748 };
1749
1750 if (!(avctx->codec->caps_internal & FF_CODEC_CAP_SETS_FRAME_PROPS)) {
1751 frame->pts = pkt->pts;
1752 #if FF_API_PKT_PTS
1753 FF_DISABLE_DEPRECATION_WARNINGS
1754 frame->pkt_pts = pkt->pts;
1755 FF_ENABLE_DEPRECATION_WARNINGS
1756 #endif
1757 frame->pkt_pos = pkt->pos;
1758 frame->pkt_duration = pkt->duration;
1759 frame->pkt_size = pkt->size;
1760
1761 for (int i = 0; i < FF_ARRAY_ELEMS(sd); i++) {
1762 buffer_size_t size;
1763 uint8_t *packet_sd = av_packet_get_side_data(pkt, sd[i].packet, &size);
1764 if (packet_sd) {
1765 AVFrameSideData *frame_sd = av_frame_new_side_data(frame,
1766 sd[i].frame,
1767 size);
1768 if (!frame_sd)
1769 return AVERROR(ENOMEM);
1770
1771 memcpy(frame_sd->data, packet_sd, size);
1772 }
1773 }
1774 add_metadata_from_side_data(pkt, frame);
1775
1776 if (pkt->flags & AV_PKT_FLAG_DISCARD) {
1777 frame->flags |= AV_FRAME_FLAG_DISCARD;
1778 } else {
1779 frame->flags = (frame->flags & ~AV_FRAME_FLAG_DISCARD);
1780 }
1781 }
1782 frame->reordered_opaque = avctx->reordered_opaque;
1783
1784 if (frame->color_primaries == AVCOL_PRI_UNSPECIFIED)
1785 frame->color_primaries = avctx->color_primaries;
1786 if (frame->color_trc == AVCOL_TRC_UNSPECIFIED)
1787 frame->color_trc = avctx->color_trc;
1788 if (frame->colorspace == AVCOL_SPC_UNSPECIFIED)
1789 frame->colorspace = avctx->colorspace;
1790 if (frame->color_range == AVCOL_RANGE_UNSPECIFIED)
1791 frame->color_range = avctx->color_range;
1792 if (frame->chroma_location == AVCHROMA_LOC_UNSPECIFIED)
1793 frame->chroma_location = avctx->chroma_sample_location;
1794
1795 switch (avctx->codec->type) {
1796 case AVMEDIA_TYPE_VIDEO:
1797 frame->format = avctx->pix_fmt;
1798 if (!frame->sample_aspect_ratio.num)
1799 frame->sample_aspect_ratio = avctx->sample_aspect_ratio;
1800
1801 if (frame->width && frame->height &&
1802 av_image_check_sar(frame->width, frame->height,
1803 frame->sample_aspect_ratio) < 0) {
1804 av_log(avctx, AV_LOG_WARNING, "ignoring invalid SAR: %u/%u\n",
1805 frame->sample_aspect_ratio.num,
1806 frame->sample_aspect_ratio.den);
1807 frame->sample_aspect_ratio = (AVRational){ 0, 1 };
1808 }
1809
1810 break;
1811 case AVMEDIA_TYPE_AUDIO:
1812 if (!frame->sample_rate)
1813 frame->sample_rate = avctx->sample_rate;
1814 if (frame->format < 0)
1815 frame->format = avctx->sample_fmt;
1816 if (!frame->channel_layout) {
1817 if (avctx->channel_layout) {
1818 if (av_get_channel_layout_nb_channels(avctx->channel_layout) !=
1819 avctx->channels) {
1820 av_log(avctx, AV_LOG_ERROR, "Inconsistent channel "
1821 "configuration.\n");
1822 return AVERROR(EINVAL);
1823 }
1824
1825 frame->channel_layout = avctx->channel_layout;
1826 } else {
1827 if (avctx->channels > FF_SANE_NB_CHANNELS) {
1828 av_log(avctx, AV_LOG_ERROR, "Too many channels: %d.\n",
1829 avctx->channels);
1830 return AVERROR(ENOSYS);
1831 }
1832 }
1833 }
1834 frame->channels = avctx->channels;
1835 break;
1836 }
1837 return 0;
1838 }
1839
validate_avframe_allocation(AVCodecContext * avctx,AVFrame * frame)1840 static void validate_avframe_allocation(AVCodecContext *avctx, AVFrame *frame)
1841 {
1842 if (avctx->codec_type == AVMEDIA_TYPE_VIDEO) {
1843 int i;
1844 int num_planes = av_pix_fmt_count_planes(frame->format);
1845 const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(frame->format);
1846 int flags = desc ? desc->flags : 0;
1847 if (num_planes == 1 && (flags & AV_PIX_FMT_FLAG_PAL))
1848 num_planes = 2;
1849 if ((flags & FF_PSEUDOPAL) && frame->data[1])
1850 num_planes = 2;
1851 for (i = 0; i < num_planes; i++) {
1852 av_assert0(frame->data[i]);
1853 }
1854 // For formats without data like hwaccel allow unused pointers to be non-NULL.
1855 for (i = num_planes; num_planes > 0 && i < FF_ARRAY_ELEMS(frame->data); i++) {
1856 if (frame->data[i])
1857 av_log(avctx, AV_LOG_ERROR, "Buffer returned by get_buffer2() did not zero unused plane pointers\n");
1858 frame->data[i] = NULL;
1859 }
1860 }
1861 }
1862
decode_data_free(void * opaque,uint8_t * data)1863 static void decode_data_free(void *opaque, uint8_t *data)
1864 {
1865 FrameDecodeData *fdd = (FrameDecodeData*)data;
1866
1867 if (fdd->post_process_opaque_free)
1868 fdd->post_process_opaque_free(fdd->post_process_opaque);
1869
1870 if (fdd->hwaccel_priv_free)
1871 fdd->hwaccel_priv_free(fdd->hwaccel_priv);
1872
1873 av_freep(&fdd);
1874 }
1875
ff_attach_decode_data(AVFrame * frame)1876 int ff_attach_decode_data(AVFrame *frame)
1877 {
1878 AVBufferRef *fdd_buf;
1879 FrameDecodeData *fdd;
1880
1881 av_assert1(!frame->private_ref);
1882 av_buffer_unref(&frame->private_ref);
1883
1884 fdd = av_mallocz(sizeof(*fdd));
1885 if (!fdd)
1886 return AVERROR(ENOMEM);
1887
1888 fdd_buf = av_buffer_create((uint8_t*)fdd, sizeof(*fdd), decode_data_free,
1889 NULL, AV_BUFFER_FLAG_READONLY);
1890 if (!fdd_buf) {
1891 av_freep(&fdd);
1892 return AVERROR(ENOMEM);
1893 }
1894
1895 frame->private_ref = fdd_buf;
1896
1897 return 0;
1898 }
1899
ff_get_buffer(AVCodecContext * avctx,AVFrame * frame,int flags)1900 int ff_get_buffer(AVCodecContext *avctx, AVFrame *frame, int flags)
1901 {
1902 const AVHWAccel *hwaccel = avctx->hwaccel;
1903 int override_dimensions = 1;
1904 int ret;
1905
1906 if (avctx->codec_type == AVMEDIA_TYPE_VIDEO) {
1907 if ((unsigned)avctx->width > INT_MAX - STRIDE_ALIGN ||
1908 (ret = av_image_check_size2(FFALIGN(avctx->width, STRIDE_ALIGN), avctx->height, avctx->max_pixels, AV_PIX_FMT_NONE, 0, avctx)) < 0 || avctx->pix_fmt<0) {
1909 av_log(avctx, AV_LOG_ERROR, "video_get_buffer: image parameters invalid\n");
1910 ret = AVERROR(EINVAL);
1911 goto fail;
1912 }
1913
1914 if (frame->width <= 0 || frame->height <= 0) {
1915 frame->width = FFMAX(avctx->width, AV_CEIL_RSHIFT(avctx->coded_width, avctx->lowres));
1916 frame->height = FFMAX(avctx->height, AV_CEIL_RSHIFT(avctx->coded_height, avctx->lowres));
1917 override_dimensions = 0;
1918 }
1919
1920 if (frame->data[0] || frame->data[1] || frame->data[2] || frame->data[3]) {
1921 av_log(avctx, AV_LOG_ERROR, "pic->data[*]!=NULL in get_buffer_internal\n");
1922 ret = AVERROR(EINVAL);
1923 goto fail;
1924 }
1925 } else if (avctx->codec_type == AVMEDIA_TYPE_AUDIO) {
1926 if (frame->nb_samples * (int64_t)avctx->channels > avctx->max_samples) {
1927 av_log(avctx, AV_LOG_ERROR, "samples per frame %d, exceeds max_samples %"PRId64"\n", frame->nb_samples, avctx->max_samples);
1928 ret = AVERROR(EINVAL);
1929 goto fail;
1930 }
1931 }
1932 ret = ff_decode_frame_props(avctx, frame);
1933 if (ret < 0)
1934 goto fail;
1935
1936 if (hwaccel) {
1937 if (hwaccel->alloc_frame) {
1938 ret = hwaccel->alloc_frame(avctx, frame);
1939 goto end;
1940 }
1941 } else
1942 avctx->sw_pix_fmt = avctx->pix_fmt;
1943
1944 ret = avctx->get_buffer2(avctx, frame, flags);
1945 if (ret < 0)
1946 goto fail;
1947
1948 validate_avframe_allocation(avctx, frame);
1949
1950 ret = ff_attach_decode_data(frame);
1951 if (ret < 0)
1952 goto fail;
1953
1954 end:
1955 if (avctx->codec_type == AVMEDIA_TYPE_VIDEO && !override_dimensions &&
1956 !(avctx->codec->caps_internal & FF_CODEC_CAP_EXPORTS_CROPPING)) {
1957 frame->width = avctx->width;
1958 frame->height = avctx->height;
1959 }
1960
1961 fail:
1962 if (ret < 0) {
1963 av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n");
1964 av_frame_unref(frame);
1965 }
1966
1967 return ret;
1968 }
1969
reget_buffer_internal(AVCodecContext * avctx,AVFrame * frame,int flags)1970 static int reget_buffer_internal(AVCodecContext *avctx, AVFrame *frame, int flags)
1971 {
1972 AVFrame *tmp;
1973 int ret;
1974
1975 av_assert0(avctx->codec_type == AVMEDIA_TYPE_VIDEO);
1976
1977 if (frame->data[0] && (frame->width != avctx->width || frame->height != avctx->height || frame->format != avctx->pix_fmt)) {
1978 av_log(avctx, AV_LOG_WARNING, "Picture changed from size:%dx%d fmt:%s to size:%dx%d fmt:%s in reget buffer()\n",
1979 frame->width, frame->height, av_get_pix_fmt_name(frame->format), avctx->width, avctx->height, av_get_pix_fmt_name(avctx->pix_fmt));
1980 av_frame_unref(frame);
1981 }
1982
1983 if (!frame->data[0])
1984 return ff_get_buffer(avctx, frame, AV_GET_BUFFER_FLAG_REF);
1985
1986 if ((flags & FF_REGET_BUFFER_FLAG_READONLY) || av_frame_is_writable(frame))
1987 return ff_decode_frame_props(avctx, frame);
1988
1989 tmp = av_frame_alloc();
1990 if (!tmp)
1991 return AVERROR(ENOMEM);
1992
1993 av_frame_move_ref(tmp, frame);
1994
1995 ret = ff_get_buffer(avctx, frame, AV_GET_BUFFER_FLAG_REF);
1996 if (ret < 0) {
1997 av_frame_free(&tmp);
1998 return ret;
1999 }
2000
2001 av_frame_copy(frame, tmp);
2002 av_frame_free(&tmp);
2003
2004 return 0;
2005 }
2006
ff_reget_buffer(AVCodecContext * avctx,AVFrame * frame,int flags)2007 int ff_reget_buffer(AVCodecContext *avctx, AVFrame *frame, int flags)
2008 {
2009 int ret = reget_buffer_internal(avctx, frame, flags);
2010 if (ret < 0)
2011 av_log(avctx, AV_LOG_ERROR, "reget_buffer() failed\n");
2012 return ret;
2013 }
2014
ff_decode_preinit(AVCodecContext * avctx)2015 int ff_decode_preinit(AVCodecContext *avctx)
2016 {
2017 int ret = 0;
2018
2019 /* if the decoder init function was already called previously,
2020 * free the already allocated subtitle_header before overwriting it */
2021 av_freep(&avctx->subtitle_header);
2022
2023 #if FF_API_THREAD_SAFE_CALLBACKS
2024 FF_DISABLE_DEPRECATION_WARNINGS
2025 if ((avctx->thread_type & FF_THREAD_FRAME) &&
2026 avctx->get_buffer2 != avcodec_default_get_buffer2 &&
2027 !avctx->thread_safe_callbacks) {
2028 av_log(avctx, AV_LOG_WARNING, "Requested frame threading with a "
2029 "custom get_buffer2() implementation which is not marked as "
2030 "thread safe. This is not supported anymore, make your "
2031 "callback thread-safe.\n");
2032 }
2033 FF_ENABLE_DEPRECATION_WARNINGS
2034 #endif
2035
2036 if (avctx->codec->max_lowres < avctx->lowres || avctx->lowres < 0) {
2037 av_log(avctx, AV_LOG_WARNING, "The maximum value for lowres supported by the decoder is %d\n",
2038 avctx->codec->max_lowres);
2039 avctx->lowres = avctx->codec->max_lowres;
2040 }
2041
2042 avctx->pts_correction_num_faulty_pts =
2043 avctx->pts_correction_num_faulty_dts = 0;
2044 avctx->pts_correction_last_pts =
2045 avctx->pts_correction_last_dts = INT64_MIN;
2046
2047 if ( !CONFIG_GRAY && avctx->flags & AV_CODEC_FLAG_GRAY
2048 && avctx->codec_descriptor->type == AVMEDIA_TYPE_VIDEO)
2049 av_log(avctx, AV_LOG_WARNING,
2050 "gray decoding requested but not enabled at configuration time\n");
2051 if (avctx->flags2 & AV_CODEC_FLAG2_EXPORT_MVS) {
2052 avctx->export_side_data |= AV_CODEC_EXPORT_DATA_MVS;
2053 }
2054
2055 ret = decode_bsfs_init(avctx);
2056 if (ret < 0)
2057 return ret;
2058
2059 return 0;
2060 }
2061