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