2 * generic decoding-related code
4 * This file is part of FFmpeg.
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.
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.
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
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"
42 #include "bytestream.h"
48 static int apply_param_change(AVCodecContext *avctx, const AVPacket *avpkt)
55 data = av_packet_get_side_data(avpkt, AV_PKT_DATA_PARAM_CHANGE, &size);
59 if (!(avctx->codec->capabilities & AV_CODEC_CAP_PARAM_CHANGE)) {
60 av_log(avctx, AV_LOG_ERROR, "This decoder does not support parameter "
61 "changes, but PARAM_CHANGE side data was sent to it.\n");
62 ret = AVERROR(EINVAL);
69 flags = bytestream_get_le32(&data);
72 if (flags & AV_SIDE_DATA_PARAM_CHANGE_CHANNEL_COUNT) {
75 val = bytestream_get_le32(&data);
76 if (val <= 0 || val > INT_MAX) {
77 av_log(avctx, AV_LOG_ERROR, "Invalid channel count");
78 ret = AVERROR_INVALIDDATA;
81 avctx->channels = val;
84 if (flags & AV_SIDE_DATA_PARAM_CHANGE_CHANNEL_LAYOUT) {
87 avctx->channel_layout = bytestream_get_le64(&data);
90 if (flags & AV_SIDE_DATA_PARAM_CHANGE_SAMPLE_RATE) {
93 val = bytestream_get_le32(&data);
94 if (val <= 0 || val > INT_MAX) {
95 av_log(avctx, AV_LOG_ERROR, "Invalid sample rate");
96 ret = AVERROR_INVALIDDATA;
99 avctx->sample_rate = val;
102 if (flags & AV_SIDE_DATA_PARAM_CHANGE_DIMENSIONS) {
105 avctx->width = bytestream_get_le32(&data);
106 avctx->height = bytestream_get_le32(&data);
108 ret = ff_set_dimensions(avctx, avctx->width, avctx->height);
115 av_log(avctx, AV_LOG_ERROR, "PARAM_CHANGE side data too small.\n");
116 ret = AVERROR_INVALIDDATA;
119 av_log(avctx, AV_LOG_ERROR, "Error applying parameter changes.\n");
120 if (avctx->err_recognition & AV_EF_EXPLODE)
126 static int extract_packet_props(AVCodecInternal *avci, const AVPacket *pkt)
130 av_packet_unref(avci->last_pkt_props);
132 ret = av_packet_copy_props(avci->last_pkt_props, pkt);
134 avci->last_pkt_props->size = pkt->size; // HACK: Needed for ff_decode_frame_props().
139 static int unrefcount_frame(AVCodecInternal *avci, AVFrame *frame)
143 /* move the original frame to our backup */
144 av_frame_unref(avci->to_free);
145 av_frame_move_ref(avci->to_free, frame);
147 /* now copy everything except the AVBufferRefs back
148 * note that we make a COPY of the side data, so calling av_frame_free() on
149 * the caller's frame will work properly */
150 ret = av_frame_copy_props(frame, avci->to_free);
154 memcpy(frame->data, avci->to_free->data, sizeof(frame->data));
155 memcpy(frame->linesize, avci->to_free->linesize, sizeof(frame->linesize));
156 if (avci->to_free->extended_data != avci->to_free->data) {
157 int planes = avci->to_free->channels;
158 int size = planes * sizeof(*frame->extended_data);
161 av_frame_unref(frame);
165 frame->extended_data = av_malloc(size);
166 if (!frame->extended_data) {
167 av_frame_unref(frame);
168 return AVERROR(ENOMEM);
170 memcpy(frame->extended_data, avci->to_free->extended_data,
173 frame->extended_data = frame->data;
175 frame->format = avci->to_free->format;
176 frame->width = avci->to_free->width;
177 frame->height = avci->to_free->height;
178 frame->channel_layout = avci->to_free->channel_layout;
179 frame->nb_samples = avci->to_free->nb_samples;
180 frame->channels = avci->to_free->channels;
185 int ff_decode_bsfs_init(AVCodecContext *avctx)
187 AVCodecInternal *avci = avctx->internal;
188 DecodeFilterContext *s = &avci->filter;
189 const char *bsfs_str;
195 bsfs_str = avctx->codec->bsfs ? avctx->codec->bsfs : "null";
196 while (bsfs_str && *bsfs_str) {
198 const AVBitStreamFilter *filter;
199 char *bsf, *bsf_options_str, *bsf_name;
201 bsf = av_get_token(&bsfs_str, ",");
203 ret = AVERROR(ENOMEM);
206 bsf_name = av_strtok(bsf, "=", &bsf_options_str);
209 ret = AVERROR(ENOMEM);
213 filter = av_bsf_get_by_name(bsf_name);
215 av_log(avctx, AV_LOG_ERROR, "A non-existing bitstream filter %s "
216 "requested by a decoder. This is a bug, please report it.\n",
223 tmp = av_realloc_array(s->bsfs, s->nb_bsfs + 1, sizeof(*s->bsfs));
226 ret = AVERROR(ENOMEM);
232 ret = av_bsf_alloc(filter, &s->bsfs[s->nb_bsfs - 1]);
238 if (s->nb_bsfs == 1) {
239 /* We do not currently have an API for passing the input timebase into decoders,
240 * but no filters used here should actually need it.
241 * So we make up some plausible-looking number (the MPEG 90kHz timebase) */
242 s->bsfs[s->nb_bsfs - 1]->time_base_in = (AVRational){ 1, 90000 };
243 ret = avcodec_parameters_from_context(s->bsfs[s->nb_bsfs - 1]->par_in,
246 s->bsfs[s->nb_bsfs - 1]->time_base_in = s->bsfs[s->nb_bsfs - 2]->time_base_out;
247 ret = avcodec_parameters_copy(s->bsfs[s->nb_bsfs - 1]->par_in,
248 s->bsfs[s->nb_bsfs - 2]->par_out);
255 if (bsf_options_str && filter->priv_class) {
256 const AVOption *opt = av_opt_next(s->bsfs[s->nb_bsfs - 1]->priv_data, NULL);
257 const char * shorthand[2] = {NULL};
260 shorthand[0] = opt->name;
262 ret = av_opt_set_from_string(s->bsfs[s->nb_bsfs - 1]->priv_data, bsf_options_str, shorthand, "=", ":");
264 if (ret != AVERROR(ENOMEM)) {
265 av_log(avctx, AV_LOG_ERROR, "Invalid options for bitstream filter %s "
266 "requested by the decoder. This is a bug, please report it.\n",
276 ret = av_bsf_init(s->bsfs[s->nb_bsfs - 1]);
286 ff_decode_bsfs_uninit(avctx);
290 /* try to get one output packet from the filter chain */
291 static int bsfs_poll(AVCodecContext *avctx, AVPacket *pkt)
293 DecodeFilterContext *s = &avctx->internal->filter;
296 /* start with the last filter in the chain */
297 idx = s->nb_bsfs - 1;
299 /* request a packet from the currently selected filter */
300 ret = av_bsf_receive_packet(s->bsfs[idx], pkt);
301 if (ret == AVERROR(EAGAIN)) {
302 /* no packets available, try the next filter up the chain */
305 } else if (ret < 0 && ret != AVERROR_EOF) {
309 /* got a packet or EOF -- pass it to the caller or to the next filter
311 if (idx == s->nb_bsfs - 1) {
315 ret = av_bsf_send_packet(s->bsfs[idx], ret < 0 ? NULL : pkt);
317 av_log(avctx, AV_LOG_ERROR,
318 "Error pre-processing a packet before decoding\n");
319 av_packet_unref(pkt);
325 return AVERROR(EAGAIN);
328 int ff_decode_get_packet(AVCodecContext *avctx, AVPacket *pkt)
330 AVCodecInternal *avci = avctx->internal;
336 ret = bsfs_poll(avctx, pkt);
337 if (ret == AVERROR_EOF)
342 ret = extract_packet_props(avctx->internal, pkt);
346 ret = apply_param_change(avctx, pkt);
350 if (avctx->codec->receive_frame)
351 avci->compat_decode_consumed += pkt->size;
355 av_packet_unref(pkt);
360 * Attempt to guess proper monotonic timestamps for decoded video frames
361 * which might have incorrect times. Input timestamps may wrap around, in
362 * which case the output will as well.
364 * @param pts the pts field of the decoded AVPacket, as passed through
366 * @param dts the dts field of the decoded AVPacket
367 * @return one of the input values, may be AV_NOPTS_VALUE
369 static int64_t guess_correct_pts(AVCodecContext *ctx,
370 int64_t reordered_pts, int64_t dts)
372 int64_t pts = AV_NOPTS_VALUE;
374 if (dts != AV_NOPTS_VALUE) {
375 ctx->pts_correction_num_faulty_dts += dts <= ctx->pts_correction_last_dts;
376 ctx->pts_correction_last_dts = dts;
377 } else if (reordered_pts != AV_NOPTS_VALUE)
378 ctx->pts_correction_last_dts = reordered_pts;
380 if (reordered_pts != AV_NOPTS_VALUE) {
381 ctx->pts_correction_num_faulty_pts += reordered_pts <= ctx->pts_correction_last_pts;
382 ctx->pts_correction_last_pts = reordered_pts;
383 } else if(dts != AV_NOPTS_VALUE)
384 ctx->pts_correction_last_pts = dts;
386 if ((ctx->pts_correction_num_faulty_pts<=ctx->pts_correction_num_faulty_dts || dts == AV_NOPTS_VALUE)
387 && reordered_pts != AV_NOPTS_VALUE)
396 * The core of the receive_frame_wrapper for the decoders implementing
397 * the simple API. Certain decoders might consume partial packets without
398 * returning any output, so this function needs to be called in a loop until it
401 static int decode_simple_internal(AVCodecContext *avctx, AVFrame *frame)
403 AVCodecInternal *avci = avctx->internal;
404 DecodeSimpleContext *ds = &avci->ds;
405 AVPacket *pkt = ds->in_pkt;
406 // copy to ensure we do not change pkt
407 int got_frame, actual_got_frame;
410 if (!pkt->data && !avci->draining) {
411 av_packet_unref(pkt);
412 ret = ff_decode_get_packet(avctx, pkt);
413 if (ret < 0 && ret != AVERROR_EOF)
417 // Some codecs (at least wma lossless) will crash when feeding drain packets
418 // after EOF was signaled.
419 if (avci->draining_done)
423 !(avctx->codec->capabilities & AV_CODEC_CAP_DELAY ||
424 avctx->active_thread_type & FF_THREAD_FRAME))
429 if (HAVE_THREADS && avctx->active_thread_type & FF_THREAD_FRAME) {
430 ret = ff_thread_decode_frame(avctx, frame, &got_frame, pkt);
432 ret = avctx->codec->decode(avctx, frame, &got_frame, pkt);
434 if (!(avctx->codec->caps_internal & FF_CODEC_CAP_SETS_PKT_DTS))
435 frame->pkt_dts = pkt->dts;
436 if (avctx->codec->type == AVMEDIA_TYPE_VIDEO) {
437 if(!avctx->has_b_frames)
438 frame->pkt_pos = pkt->pos;
439 //FIXME these should be under if(!avctx->has_b_frames)
440 /* get_buffer is supposed to set frame parameters */
441 if (!(avctx->codec->capabilities & AV_CODEC_CAP_DR1)) {
442 if (!frame->sample_aspect_ratio.num) frame->sample_aspect_ratio = avctx->sample_aspect_ratio;
443 if (!frame->width) frame->width = avctx->width;
444 if (!frame->height) frame->height = avctx->height;
445 if (frame->format == AV_PIX_FMT_NONE) frame->format = avctx->pix_fmt;
450 actual_got_frame = got_frame;
452 if (avctx->codec->type == AVMEDIA_TYPE_VIDEO) {
453 if (frame->flags & AV_FRAME_FLAG_DISCARD)
456 frame->best_effort_timestamp = guess_correct_pts(avctx,
459 } else if (avctx->codec->type == AVMEDIA_TYPE_AUDIO) {
462 uint32_t discard_padding = 0;
463 uint8_t skip_reason = 0;
464 uint8_t discard_reason = 0;
466 if (ret >= 0 && got_frame) {
467 frame->best_effort_timestamp = guess_correct_pts(avctx,
470 if (frame->format == AV_SAMPLE_FMT_NONE)
471 frame->format = avctx->sample_fmt;
472 if (!frame->channel_layout)
473 frame->channel_layout = avctx->channel_layout;
474 if (!frame->channels)
475 frame->channels = avctx->channels;
476 if (!frame->sample_rate)
477 frame->sample_rate = avctx->sample_rate;
480 side= av_packet_get_side_data(avci->last_pkt_props, AV_PKT_DATA_SKIP_SAMPLES, &side_size);
481 if(side && side_size>=10) {
482 avctx->internal->skip_samples = AV_RL32(side) * avctx->internal->skip_samples_multiplier;
483 discard_padding = AV_RL32(side + 4);
484 av_log(avctx, AV_LOG_DEBUG, "skip %d / discard %d samples due to side data\n",
485 avctx->internal->skip_samples, (int)discard_padding);
486 skip_reason = AV_RL8(side + 8);
487 discard_reason = AV_RL8(side + 9);
490 if ((frame->flags & AV_FRAME_FLAG_DISCARD) && got_frame &&
491 !(avctx->flags2 & AV_CODEC_FLAG2_SKIP_MANUAL)) {
492 avctx->internal->skip_samples = FFMAX(0, avctx->internal->skip_samples - frame->nb_samples);
496 if (avctx->internal->skip_samples > 0 && got_frame &&
497 !(avctx->flags2 & AV_CODEC_FLAG2_SKIP_MANUAL)) {
498 if(frame->nb_samples <= avctx->internal->skip_samples){
500 avctx->internal->skip_samples -= frame->nb_samples;
501 av_log(avctx, AV_LOG_DEBUG, "skip whole frame, skip left: %d\n",
502 avctx->internal->skip_samples);
504 av_samples_copy(frame->extended_data, frame->extended_data, 0, avctx->internal->skip_samples,
505 frame->nb_samples - avctx->internal->skip_samples, avctx->channels, frame->format);
506 if(avctx->pkt_timebase.num && avctx->sample_rate) {
507 int64_t diff_ts = av_rescale_q(avctx->internal->skip_samples,
508 (AVRational){1, avctx->sample_rate},
509 avctx->pkt_timebase);
510 if(frame->pts!=AV_NOPTS_VALUE)
511 frame->pts += diff_ts;
513 FF_DISABLE_DEPRECATION_WARNINGS
514 if(frame->pkt_pts!=AV_NOPTS_VALUE)
515 frame->pkt_pts += diff_ts;
516 FF_ENABLE_DEPRECATION_WARNINGS
518 if(frame->pkt_dts!=AV_NOPTS_VALUE)
519 frame->pkt_dts += diff_ts;
520 if (frame->pkt_duration >= diff_ts)
521 frame->pkt_duration -= diff_ts;
523 av_log(avctx, AV_LOG_WARNING, "Could not update timestamps for skipped samples.\n");
525 av_log(avctx, AV_LOG_DEBUG, "skip %d/%d samples\n",
526 avctx->internal->skip_samples, frame->nb_samples);
527 frame->nb_samples -= avctx->internal->skip_samples;
528 avctx->internal->skip_samples = 0;
532 if (discard_padding > 0 && discard_padding <= frame->nb_samples && got_frame &&
533 !(avctx->flags2 & AV_CODEC_FLAG2_SKIP_MANUAL)) {
534 if (discard_padding == frame->nb_samples) {
537 if(avctx->pkt_timebase.num && avctx->sample_rate) {
538 int64_t diff_ts = av_rescale_q(frame->nb_samples - discard_padding,
539 (AVRational){1, avctx->sample_rate},
540 avctx->pkt_timebase);
541 frame->pkt_duration = diff_ts;
543 av_log(avctx, AV_LOG_WARNING, "Could not update timestamps for discarded samples.\n");
545 av_log(avctx, AV_LOG_DEBUG, "discard %d/%d samples\n",
546 (int)discard_padding, frame->nb_samples);
547 frame->nb_samples -= discard_padding;
551 if ((avctx->flags2 & AV_CODEC_FLAG2_SKIP_MANUAL) && got_frame) {
552 AVFrameSideData *fside = av_frame_new_side_data(frame, AV_FRAME_DATA_SKIP_SAMPLES, 10);
554 AV_WL32(fside->data, avctx->internal->skip_samples);
555 AV_WL32(fside->data + 4, discard_padding);
556 AV_WL8(fside->data + 8, skip_reason);
557 AV_WL8(fside->data + 9, discard_reason);
558 avctx->internal->skip_samples = 0;
563 if (avctx->codec->type == AVMEDIA_TYPE_AUDIO &&
564 !avci->showed_multi_packet_warning &&
565 ret >= 0 && ret != pkt->size && !(avctx->codec->capabilities & AV_CODEC_CAP_SUBFRAMES)) {
566 av_log(avctx, AV_LOG_WARNING, "Multiple frames in a packet.\n");
567 avci->showed_multi_packet_warning = 1;
571 av_frame_unref(frame);
573 if (ret >= 0 && avctx->codec->type == AVMEDIA_TYPE_VIDEO && !(avctx->flags & AV_CODEC_FLAG_TRUNCATED))
576 #if FF_API_AVCTX_TIMEBASE
577 if (avctx->framerate.num > 0 && avctx->framerate.den > 0)
578 avctx->time_base = av_inv_q(av_mul_q(avctx->framerate, (AVRational){avctx->ticks_per_frame, 1}));
581 /* do not stop draining when actual_got_frame != 0 or ret < 0 */
582 /* got_frame == 0 but actual_got_frame != 0 when frame is discarded */
583 if (avctx->internal->draining && !actual_got_frame) {
585 /* prevent infinite loop if a decoder wrongly always return error on draining */
586 /* reasonable nb_errors_max = maximum b frames + thread count */
587 int nb_errors_max = 20 + (HAVE_THREADS && avctx->active_thread_type & FF_THREAD_FRAME ?
588 avctx->thread_count : 1);
590 if (avci->nb_draining_errors++ >= nb_errors_max) {
591 av_log(avctx, AV_LOG_ERROR, "Too many errors when draining, this is a bug. "
592 "Stop draining and force EOF.\n");
593 avci->draining_done = 1;
597 avci->draining_done = 1;
601 avci->compat_decode_consumed += ret;
603 if (ret >= pkt->size || ret < 0) {
604 av_packet_unref(pkt);
608 pkt->data += consumed;
609 pkt->size -= consumed;
610 avci->last_pkt_props->size -= consumed; // See extract_packet_props() comment.
611 pkt->pts = AV_NOPTS_VALUE;
612 pkt->dts = AV_NOPTS_VALUE;
613 avci->last_pkt_props->pts = AV_NOPTS_VALUE;
614 avci->last_pkt_props->dts = AV_NOPTS_VALUE;
618 av_assert0(frame->buf[0]);
620 return ret < 0 ? ret : 0;
623 static int decode_simple_receive_frame(AVCodecContext *avctx, AVFrame *frame)
627 while (!frame->buf[0]) {
628 ret = decode_simple_internal(avctx, frame);
636 static int decode_receive_frame_internal(AVCodecContext *avctx, AVFrame *frame)
638 AVCodecInternal *avci = avctx->internal;
641 av_assert0(!frame->buf[0]);
643 if (avctx->codec->receive_frame)
644 ret = avctx->codec->receive_frame(avctx, frame);
646 ret = decode_simple_receive_frame(avctx, frame);
648 if (ret == AVERROR_EOF)
649 avci->draining_done = 1;
652 /* the only case where decode data is not set should be decoders
653 * that do not call ff_get_buffer() */
654 av_assert0((frame->private_ref && frame->private_ref->size == sizeof(FrameDecodeData)) ||
655 !(avctx->codec->capabilities & AV_CODEC_CAP_DR1));
657 if (frame->private_ref) {
658 FrameDecodeData *fdd = (FrameDecodeData*)frame->private_ref->data;
660 if (fdd->post_process) {
661 ret = fdd->post_process(avctx, frame);
663 av_frame_unref(frame);
670 /* free the per-frame decode data */
671 av_buffer_unref(&frame->private_ref);
676 int attribute_align_arg avcodec_send_packet(AVCodecContext *avctx, const AVPacket *avpkt)
678 AVCodecInternal *avci = avctx->internal;
681 if (!avcodec_is_open(avctx) || !av_codec_is_decoder(avctx->codec))
682 return AVERROR(EINVAL);
684 if (avctx->internal->draining)
687 if (avpkt && !avpkt->size && avpkt->data)
688 return AVERROR(EINVAL);
690 av_packet_unref(avci->buffer_pkt);
691 if (avpkt && (avpkt->data || avpkt->side_data_elems)) {
692 ret = av_packet_ref(avci->buffer_pkt, avpkt);
697 ret = av_bsf_send_packet(avci->filter.bsfs[0], avci->buffer_pkt);
699 av_packet_unref(avci->buffer_pkt);
703 if (!avci->buffer_frame->buf[0]) {
704 ret = decode_receive_frame_internal(avctx, avci->buffer_frame);
705 if (ret < 0 && ret != AVERROR(EAGAIN) && ret != AVERROR_EOF)
712 static int apply_cropping(AVCodecContext *avctx, AVFrame *frame)
714 /* make sure we are noisy about decoders returning invalid cropping data */
715 if (frame->crop_left >= INT_MAX - frame->crop_right ||
716 frame->crop_top >= INT_MAX - frame->crop_bottom ||
717 (frame->crop_left + frame->crop_right) >= frame->width ||
718 (frame->crop_top + frame->crop_bottom) >= frame->height) {
719 av_log(avctx, AV_LOG_WARNING,
720 "Invalid cropping information set by a decoder: "
721 "%"SIZE_SPECIFIER"/%"SIZE_SPECIFIER"/%"SIZE_SPECIFIER"/%"SIZE_SPECIFIER" "
722 "(frame size %dx%d). This is a bug, please report it\n",
723 frame->crop_left, frame->crop_right, frame->crop_top, frame->crop_bottom,
724 frame->width, frame->height);
725 frame->crop_left = 0;
726 frame->crop_right = 0;
728 frame->crop_bottom = 0;
732 if (!avctx->apply_cropping)
735 return av_frame_apply_cropping(frame, avctx->flags & AV_CODEC_FLAG_UNALIGNED ?
736 AV_FRAME_CROP_UNALIGNED : 0);
739 int attribute_align_arg avcodec_receive_frame(AVCodecContext *avctx, AVFrame *frame)
741 AVCodecInternal *avci = avctx->internal;
744 av_frame_unref(frame);
746 if (!avcodec_is_open(avctx) || !av_codec_is_decoder(avctx->codec))
747 return AVERROR(EINVAL);
749 if (avci->buffer_frame->buf[0]) {
750 av_frame_move_ref(frame, avci->buffer_frame);
752 ret = decode_receive_frame_internal(avctx, frame);
757 if (avctx->codec_type == AVMEDIA_TYPE_VIDEO) {
758 ret = apply_cropping(avctx, frame);
760 av_frame_unref(frame);
765 avctx->frame_number++;
767 if (avctx->flags & AV_CODEC_FLAG_DROPCHANGED) {
769 if (avctx->frame_number == 1) {
770 avci->initial_format = frame->format;
771 switch(avctx->codec_type) {
772 case AVMEDIA_TYPE_VIDEO:
773 avci->initial_width = frame->width;
774 avci->initial_height = frame->height;
776 case AVMEDIA_TYPE_AUDIO:
777 avci->initial_sample_rate = frame->sample_rate ? frame->sample_rate :
779 avci->initial_channels = frame->channels;
780 avci->initial_channel_layout = frame->channel_layout;
785 if (avctx->frame_number > 1) {
786 changed = avci->initial_format != frame->format;
788 switch(avctx->codec_type) {
789 case AVMEDIA_TYPE_VIDEO:
790 changed |= avci->initial_width != frame->width ||
791 avci->initial_height != frame->height;
793 case AVMEDIA_TYPE_AUDIO:
794 changed |= avci->initial_sample_rate != frame->sample_rate ||
795 avci->initial_sample_rate != avctx->sample_rate ||
796 avci->initial_channels != frame->channels ||
797 avci->initial_channel_layout != frame->channel_layout;
802 avci->changed_frames_dropped++;
803 av_log(avctx, AV_LOG_INFO, "dropped changed frame #%d pts %"PRId64
804 " drop count: %d \n",
805 avctx->frame_number, frame->pts,
806 avci->changed_frames_dropped);
807 av_frame_unref(frame);
808 return AVERROR_INPUT_CHANGED;
815 static int compat_decode(AVCodecContext *avctx, AVFrame *frame,
816 int *got_frame, const AVPacket *pkt)
818 AVCodecInternal *avci = avctx->internal;
821 av_assert0(avci->compat_decode_consumed == 0);
823 if (avci->draining_done && pkt && pkt->size != 0) {
824 av_log(avctx, AV_LOG_WARNING, "Got unexpected packet after EOF\n");
825 avcodec_flush_buffers(avctx);
829 avci->compat_decode = 1;
831 if (avci->compat_decode_partial_size > 0 &&
832 avci->compat_decode_partial_size != pkt->size) {
833 av_log(avctx, AV_LOG_ERROR,
834 "Got unexpected packet size after a partial decode\n");
835 ret = AVERROR(EINVAL);
839 if (!avci->compat_decode_partial_size) {
840 ret = avcodec_send_packet(avctx, pkt);
841 if (ret == AVERROR_EOF)
843 else if (ret == AVERROR(EAGAIN)) {
844 /* we fully drain all the output in each decode call, so this should not
853 ret = avcodec_receive_frame(avctx, frame);
855 if (ret == AVERROR(EAGAIN) || ret == AVERROR_EOF)
860 if (frame != avci->compat_decode_frame) {
861 if (!avctx->refcounted_frames) {
862 ret = unrefcount_frame(avci, frame);
868 frame = avci->compat_decode_frame;
870 if (!avci->compat_decode_warned) {
871 av_log(avctx, AV_LOG_WARNING, "The deprecated avcodec_decode_* "
872 "API cannot return all the frames for this decoder. "
873 "Some frames will be dropped. Update your code to the "
874 "new decoding API to fix this.\n");
875 avci->compat_decode_warned = 1;
879 if (avci->draining || (!avctx->codec->bsfs && avci->compat_decode_consumed < pkt->size))
885 /* if there are any bsfs then assume full packet is always consumed */
886 if (avctx->codec->bsfs)
889 ret = FFMIN(avci->compat_decode_consumed, pkt->size);
891 avci->compat_decode_consumed = 0;
892 avci->compat_decode_partial_size = (ret >= 0) ? pkt->size - ret : 0;
897 int attribute_align_arg avcodec_decode_video2(AVCodecContext *avctx, AVFrame *picture,
898 int *got_picture_ptr,
899 const AVPacket *avpkt)
901 return compat_decode(avctx, picture, got_picture_ptr, avpkt);
904 int attribute_align_arg avcodec_decode_audio4(AVCodecContext *avctx,
907 const AVPacket *avpkt)
909 return compat_decode(avctx, frame, got_frame_ptr, avpkt);
912 static void get_subtitle_defaults(AVSubtitle *sub)
914 memset(sub, 0, sizeof(*sub));
915 sub->pts = AV_NOPTS_VALUE;
918 #define UTF8_MAX_BYTES 4 /* 5 and 6 bytes sequences should not be used */
919 static int recode_subtitle(AVCodecContext *avctx,
920 AVPacket *outpkt, const AVPacket *inpkt)
923 iconv_t cd = (iconv_t)-1;
930 if (avctx->sub_charenc_mode != FF_SUB_CHARENC_MODE_PRE_DECODER || inpkt->size == 0)
934 cd = iconv_open("UTF-8", avctx->sub_charenc);
935 av_assert0(cd != (iconv_t)-1);
940 if (inl >= INT_MAX / UTF8_MAX_BYTES - AV_INPUT_BUFFER_PADDING_SIZE) {
941 av_log(avctx, AV_LOG_ERROR, "Subtitles packet is too big for recoding\n");
942 ret = AVERROR(ENOMEM);
946 ret = av_new_packet(&tmp, inl * UTF8_MAX_BYTES);
949 outpkt->buf = tmp.buf;
950 outpkt->data = tmp.data;
951 outpkt->size = tmp.size;
955 if (iconv(cd, &inb, &inl, &outb, &outl) == (size_t)-1 ||
956 iconv(cd, NULL, NULL, &outb, &outl) == (size_t)-1 ||
957 outl >= outpkt->size || inl != 0) {
958 ret = FFMIN(AVERROR(errno), -1);
959 av_log(avctx, AV_LOG_ERROR, "Unable to recode subtitle event \"%s\" "
960 "from %s to UTF-8\n", inpkt->data, avctx->sub_charenc);
961 av_packet_unref(&tmp);
964 outpkt->size -= outl;
965 memset(outpkt->data + outpkt->size, 0, outl);
968 if (cd != (iconv_t)-1)
972 av_log(avctx, AV_LOG_ERROR, "requesting subtitles recoding without iconv");
973 return AVERROR(EINVAL);
977 static int utf8_check(const uint8_t *str)
980 uint32_t codepoint, min;
984 GET_UTF8(codepoint, *(byte++), return 0;);
985 min = byte - str == 1 ? 0 : byte - str == 2 ? 0x80 :
986 1 << (5 * (byte - str) - 4);
987 if (codepoint < min || codepoint >= 0x110000 ||
988 codepoint == 0xFFFE /* BOM */ ||
989 codepoint >= 0xD800 && codepoint <= 0xDFFF /* surrogates */)
996 #if FF_API_ASS_TIMING
997 static void insert_ts(AVBPrint *buf, int ts)
1000 av_bprintf(buf, "9:59:59.99,");
1004 h = ts/360000; ts -= 360000*h;
1005 m = ts/ 6000; ts -= 6000*m;
1006 s = ts/ 100; ts -= 100*s;
1007 av_bprintf(buf, "%d:%02d:%02d.%02d,", h, m, s, ts);
1011 static int convert_sub_to_old_ass_form(AVSubtitle *sub, const AVPacket *pkt, AVRational tb)
1016 av_bprint_init(&buf, 0, AV_BPRINT_SIZE_UNLIMITED);
1018 for (i = 0; i < sub->num_rects; i++) {
1021 AVSubtitleRect *rect = sub->rects[i];
1022 int ts_start, ts_duration = -1;
1025 if (rect->type != SUBTITLE_ASS || !strncmp(rect->ass, "Dialogue: ", 10))
1028 av_bprint_clear(&buf);
1030 /* skip ReadOrder */
1031 dialog = strchr(rect->ass, ',');
1036 /* extract Layer or Marked */
1037 layer = strtol(dialog, (char**)&dialog, 10);
1042 /* rescale timing to ASS time base (ms) */
1043 ts_start = av_rescale_q(pkt->pts, tb, av_make_q(1, 100));
1044 if (pkt->duration != -1)
1045 ts_duration = av_rescale_q(pkt->duration, tb, av_make_q(1, 100));
1046 sub->end_display_time = FFMAX(sub->end_display_time, 10 * ts_duration);
1048 /* construct ASS (standalone file form with timestamps) string */
1049 av_bprintf(&buf, "Dialogue: %ld,", layer);
1050 insert_ts(&buf, ts_start);
1051 insert_ts(&buf, ts_duration == -1 ? -1 : ts_start + ts_duration);
1052 av_bprintf(&buf, "%s\r\n", dialog);
1054 final_dialog = av_strdup(buf.str);
1055 if (!av_bprint_is_complete(&buf) || !final_dialog) {
1056 av_freep(&final_dialog);
1057 av_bprint_finalize(&buf, NULL);
1058 return AVERROR(ENOMEM);
1060 av_freep(&rect->ass);
1061 rect->ass = final_dialog;
1064 av_bprint_finalize(&buf, NULL);
1069 int avcodec_decode_subtitle2(AVCodecContext *avctx, AVSubtitle *sub,
1075 if (!avpkt->data && avpkt->size) {
1076 av_log(avctx, AV_LOG_ERROR, "invalid packet: NULL data, size != 0\n");
1077 return AVERROR(EINVAL);
1080 return AVERROR(EINVAL);
1081 if (avctx->codec->type != AVMEDIA_TYPE_SUBTITLE) {
1082 av_log(avctx, AV_LOG_ERROR, "Invalid media type for subtitles\n");
1083 return AVERROR(EINVAL);
1087 get_subtitle_defaults(sub);
1089 if ((avctx->codec->capabilities & AV_CODEC_CAP_DELAY) || avpkt->size) {
1090 AVPacket pkt_recoded = *avpkt;
1092 ret = recode_subtitle(avctx, &pkt_recoded, avpkt);
1096 ret = extract_packet_props(avctx->internal, &pkt_recoded);
1100 if (avctx->pkt_timebase.num && avpkt->pts != AV_NOPTS_VALUE)
1101 sub->pts = av_rescale_q(avpkt->pts,
1102 avctx->pkt_timebase, AV_TIME_BASE_Q);
1103 ret = avctx->codec->decode(avctx, sub, got_sub_ptr, &pkt_recoded);
1104 av_assert1((ret >= 0) >= !!*got_sub_ptr &&
1105 !!*got_sub_ptr >= !!sub->num_rects);
1107 #if FF_API_ASS_TIMING
1108 if (avctx->sub_text_format == FF_SUB_TEXT_FMT_ASS_WITH_TIMINGS
1109 && *got_sub_ptr && sub->num_rects) {
1110 const AVRational tb = avctx->pkt_timebase.num ? avctx->pkt_timebase
1112 int err = convert_sub_to_old_ass_form(sub, avpkt, tb);
1118 if (sub->num_rects && !sub->end_display_time && avpkt->duration &&
1119 avctx->pkt_timebase.num) {
1120 AVRational ms = { 1, 1000 };
1121 sub->end_display_time = av_rescale_q(avpkt->duration,
1122 avctx->pkt_timebase, ms);
1125 if (avctx->codec_descriptor->props & AV_CODEC_PROP_BITMAP_SUB)
1127 else if (avctx->codec_descriptor->props & AV_CODEC_PROP_TEXT_SUB)
1130 for (i = 0; i < sub->num_rects; i++) {
1131 if (avctx->sub_charenc_mode != FF_SUB_CHARENC_MODE_IGNORE &&
1132 sub->rects[i]->ass && !utf8_check(sub->rects[i]->ass)) {
1133 av_log(avctx, AV_LOG_ERROR,
1134 "Invalid UTF-8 in decoded subtitles text; "
1135 "maybe missing -sub_charenc option\n");
1136 avsubtitle_free(sub);
1137 ret = AVERROR_INVALIDDATA;
1142 if (avpkt->data != pkt_recoded.data) { // did we recode?
1143 /* prevent from destroying side data from original packet */
1144 pkt_recoded.side_data = NULL;
1145 pkt_recoded.side_data_elems = 0;
1147 av_packet_unref(&pkt_recoded);
1152 avctx->frame_number++;
1158 enum AVPixelFormat avcodec_default_get_format(struct AVCodecContext *avctx,
1159 const enum AVPixelFormat *fmt)
1161 const AVPixFmtDescriptor *desc;
1162 const AVCodecHWConfig *config;
1165 // If a device was supplied when the codec was opened, assume that the
1166 // user wants to use it.
1167 if (avctx->hw_device_ctx && avctx->codec->hw_configs) {
1168 AVHWDeviceContext *device_ctx =
1169 (AVHWDeviceContext*)avctx->hw_device_ctx->data;
1171 config = &avctx->codec->hw_configs[i]->public;
1174 if (!(config->methods &
1175 AV_CODEC_HW_CONFIG_METHOD_HW_DEVICE_CTX))
1177 if (device_ctx->type != config->device_type)
1179 for (n = 0; fmt[n] != AV_PIX_FMT_NONE; n++) {
1180 if (config->pix_fmt == fmt[n])
1185 // No device or other setup, so we have to choose from things which
1186 // don't any other external information.
1188 // If the last element of the list is a software format, choose it
1189 // (this should be best software format if any exist).
1190 for (n = 0; fmt[n] != AV_PIX_FMT_NONE; n++);
1191 desc = av_pix_fmt_desc_get(fmt[n - 1]);
1192 if (!(desc->flags & AV_PIX_FMT_FLAG_HWACCEL))
1195 // Finally, traverse the list in order and choose the first entry
1196 // with no external dependencies (if there is no hardware configuration
1197 // information available then this just picks the first entry).
1198 for (n = 0; fmt[n] != AV_PIX_FMT_NONE; n++) {
1200 config = avcodec_get_hw_config(avctx->codec, i);
1203 if (config->pix_fmt == fmt[n])
1207 // No specific config available, so the decoder must be able
1208 // to handle this format without any additional setup.
1211 if (config->methods & AV_CODEC_HW_CONFIG_METHOD_INTERNAL) {
1212 // Usable with only internal setup.
1217 // Nothing is usable, give up.
1218 return AV_PIX_FMT_NONE;
1221 int ff_decode_get_hw_frames_ctx(AVCodecContext *avctx,
1222 enum AVHWDeviceType dev_type)
1224 AVHWDeviceContext *device_ctx;
1225 AVHWFramesContext *frames_ctx;
1228 if (!avctx->hwaccel)
1229 return AVERROR(ENOSYS);
1231 if (avctx->hw_frames_ctx)
1233 if (!avctx->hw_device_ctx) {
1234 av_log(avctx, AV_LOG_ERROR, "A hardware frames or device context is "
1235 "required for hardware accelerated decoding.\n");
1236 return AVERROR(EINVAL);
1239 device_ctx = (AVHWDeviceContext *)avctx->hw_device_ctx->data;
1240 if (device_ctx->type != dev_type) {
1241 av_log(avctx, AV_LOG_ERROR, "Device type %s expected for hardware "
1242 "decoding, but got %s.\n", av_hwdevice_get_type_name(dev_type),
1243 av_hwdevice_get_type_name(device_ctx->type));
1244 return AVERROR(EINVAL);
1247 ret = avcodec_get_hw_frames_parameters(avctx,
1248 avctx->hw_device_ctx,
1249 avctx->hwaccel->pix_fmt,
1250 &avctx->hw_frames_ctx);
1254 frames_ctx = (AVHWFramesContext*)avctx->hw_frames_ctx->data;
1257 if (frames_ctx->initial_pool_size) {
1258 // We guarantee 4 base work surfaces. The function above guarantees 1
1259 // (the absolute minimum), so add the missing count.
1260 frames_ctx->initial_pool_size += 3;
1263 ret = av_hwframe_ctx_init(avctx->hw_frames_ctx);
1265 av_buffer_unref(&avctx->hw_frames_ctx);
1272 int avcodec_get_hw_frames_parameters(AVCodecContext *avctx,
1273 AVBufferRef *device_ref,
1274 enum AVPixelFormat hw_pix_fmt,
1275 AVBufferRef **out_frames_ref)
1277 AVBufferRef *frames_ref = NULL;
1278 const AVCodecHWConfigInternal *hw_config;
1279 const AVHWAccel *hwa;
1283 hw_config = avctx->codec->hw_configs[i];
1285 return AVERROR(ENOENT);
1286 if (hw_config->public.pix_fmt == hw_pix_fmt)
1290 hwa = hw_config->hwaccel;
1291 if (!hwa || !hwa->frame_params)
1292 return AVERROR(ENOENT);
1294 frames_ref = av_hwframe_ctx_alloc(device_ref);
1296 return AVERROR(ENOMEM);
1298 ret = hwa->frame_params(avctx, frames_ref);
1300 AVHWFramesContext *frames_ctx = (AVHWFramesContext*)frames_ref->data;
1302 if (frames_ctx->initial_pool_size) {
1303 // If the user has requested that extra output surfaces be
1304 // available then add them here.
1305 if (avctx->extra_hw_frames > 0)
1306 frames_ctx->initial_pool_size += avctx->extra_hw_frames;
1308 // If frame threading is enabled then an extra surface per thread
1309 // is also required.
1310 if (avctx->active_thread_type & FF_THREAD_FRAME)
1311 frames_ctx->initial_pool_size += avctx->thread_count;
1314 *out_frames_ref = frames_ref;
1316 av_buffer_unref(&frames_ref);
1321 static int hwaccel_init(AVCodecContext *avctx,
1322 const AVCodecHWConfigInternal *hw_config)
1324 const AVHWAccel *hwaccel;
1327 hwaccel = hw_config->hwaccel;
1328 if (hwaccel->capabilities & AV_HWACCEL_CODEC_CAP_EXPERIMENTAL &&
1329 avctx->strict_std_compliance > FF_COMPLIANCE_EXPERIMENTAL) {
1330 av_log(avctx, AV_LOG_WARNING, "Ignoring experimental hwaccel: %s\n",
1332 return AVERROR_PATCHWELCOME;
1335 if (hwaccel->priv_data_size) {
1336 avctx->internal->hwaccel_priv_data =
1337 av_mallocz(hwaccel->priv_data_size);
1338 if (!avctx->internal->hwaccel_priv_data)
1339 return AVERROR(ENOMEM);
1342 avctx->hwaccel = hwaccel;
1343 if (hwaccel->init) {
1344 err = hwaccel->init(avctx);
1346 av_log(avctx, AV_LOG_ERROR, "Failed setup for format %s: "
1347 "hwaccel initialisation returned error.\n",
1348 av_get_pix_fmt_name(hw_config->public.pix_fmt));
1349 av_freep(&avctx->internal->hwaccel_priv_data);
1350 avctx->hwaccel = NULL;
1358 static void hwaccel_uninit(AVCodecContext *avctx)
1360 if (avctx->hwaccel && avctx->hwaccel->uninit)
1361 avctx->hwaccel->uninit(avctx);
1363 av_freep(&avctx->internal->hwaccel_priv_data);
1365 avctx->hwaccel = NULL;
1367 av_buffer_unref(&avctx->hw_frames_ctx);
1370 int ff_get_format(AVCodecContext *avctx, const enum AVPixelFormat *fmt)
1372 const AVPixFmtDescriptor *desc;
1373 enum AVPixelFormat *choices;
1374 enum AVPixelFormat ret, user_choice;
1375 const AVCodecHWConfigInternal *hw_config;
1376 const AVCodecHWConfig *config;
1379 // Find end of list.
1380 for (n = 0; fmt[n] != AV_PIX_FMT_NONE; n++);
1381 // Must contain at least one entry.
1383 // If a software format is available, it must be the last entry.
1384 desc = av_pix_fmt_desc_get(fmt[n - 1]);
1385 if (desc->flags & AV_PIX_FMT_FLAG_HWACCEL) {
1386 // No software format is available.
1388 avctx->sw_pix_fmt = fmt[n - 1];
1391 choices = av_malloc_array(n + 1, sizeof(*choices));
1393 return AV_PIX_FMT_NONE;
1395 memcpy(choices, fmt, (n + 1) * sizeof(*choices));
1398 // Remove the previous hwaccel, if there was one.
1399 hwaccel_uninit(avctx);
1401 user_choice = avctx->get_format(avctx, choices);
1402 if (user_choice == AV_PIX_FMT_NONE) {
1403 // Explicitly chose nothing, give up.
1404 ret = AV_PIX_FMT_NONE;
1408 desc = av_pix_fmt_desc_get(user_choice);
1410 av_log(avctx, AV_LOG_ERROR, "Invalid format returned by "
1411 "get_format() callback.\n");
1412 ret = AV_PIX_FMT_NONE;
1415 av_log(avctx, AV_LOG_DEBUG, "Format %s chosen by get_format().\n",
1418 for (i = 0; i < n; i++) {
1419 if (choices[i] == user_choice)
1423 av_log(avctx, AV_LOG_ERROR, "Invalid return from get_format(): "
1424 "%s not in possible list.\n", desc->name);
1425 ret = AV_PIX_FMT_NONE;
1429 if (avctx->codec->hw_configs) {
1431 hw_config = avctx->codec->hw_configs[i];
1434 if (hw_config->public.pix_fmt == user_choice)
1442 // No config available, so no extra setup required.
1446 config = &hw_config->public;
1448 if (config->methods &
1449 AV_CODEC_HW_CONFIG_METHOD_HW_FRAMES_CTX &&
1450 avctx->hw_frames_ctx) {
1451 const AVHWFramesContext *frames_ctx =
1452 (AVHWFramesContext*)avctx->hw_frames_ctx->data;
1453 if (frames_ctx->format != user_choice) {
1454 av_log(avctx, AV_LOG_ERROR, "Invalid setup for format %s: "
1455 "does not match the format of the provided frames "
1456 "context.\n", desc->name);
1459 } else if (config->methods &
1460 AV_CODEC_HW_CONFIG_METHOD_HW_DEVICE_CTX &&
1461 avctx->hw_device_ctx) {
1462 const AVHWDeviceContext *device_ctx =
1463 (AVHWDeviceContext*)avctx->hw_device_ctx->data;
1464 if (device_ctx->type != config->device_type) {
1465 av_log(avctx, AV_LOG_ERROR, "Invalid setup for format %s: "
1466 "does not match the type of the provided device "
1467 "context.\n", desc->name);
1470 } else if (config->methods &
1471 AV_CODEC_HW_CONFIG_METHOD_INTERNAL) {
1472 // Internal-only setup, no additional configuration.
1473 } else if (config->methods &
1474 AV_CODEC_HW_CONFIG_METHOD_AD_HOC) {
1475 // Some ad-hoc configuration we can't see and can't check.
1477 av_log(avctx, AV_LOG_ERROR, "Invalid setup for format %s: "
1478 "missing configuration.\n", desc->name);
1481 if (hw_config->hwaccel) {
1482 av_log(avctx, AV_LOG_DEBUG, "Format %s requires hwaccel "
1483 "initialisation.\n", desc->name);
1484 err = hwaccel_init(avctx, hw_config);
1492 av_log(avctx, AV_LOG_DEBUG, "Format %s not usable, retrying "
1493 "get_format() without it.\n", desc->name);
1494 for (i = 0; i < n; i++) {
1495 if (choices[i] == user_choice)
1498 for (; i + 1 < n; i++)
1499 choices[i] = choices[i + 1];
1507 static int update_frame_pool(AVCodecContext *avctx, AVFrame *frame)
1509 FramePool *pool = avctx->internal->pool;
1512 switch (avctx->codec_type) {
1513 case AVMEDIA_TYPE_VIDEO: {
1516 int size[4] = { 0 };
1517 int w = frame->width;
1518 int h = frame->height;
1519 int tmpsize, unaligned;
1521 if (pool->format == frame->format &&
1522 pool->width == frame->width && pool->height == frame->height)
1525 avcodec_align_dimensions2(avctx, &w, &h, pool->stride_align);
1528 // NOTE: do not align linesizes individually, this breaks e.g. assumptions
1529 // that linesize[0] == 2*linesize[1] in the MPEG-encoder for 4:2:2
1530 ret = av_image_fill_linesizes(linesize, avctx->pix_fmt, w);
1533 // increase alignment of w for next try (rhs gives the lowest bit set in w)
1537 for (i = 0; i < 4; i++)
1538 unaligned |= linesize[i] % pool->stride_align[i];
1539 } while (unaligned);
1541 tmpsize = av_image_fill_pointers(data, avctx->pix_fmt, h,
1546 for (i = 0; i < 3 && data[i + 1]; i++)
1547 size[i] = data[i + 1] - data[i];
1548 size[i] = tmpsize - (data[i] - data[0]);
1550 for (i = 0; i < 4; i++) {
1551 av_buffer_pool_uninit(&pool->pools[i]);
1552 pool->linesize[i] = linesize[i];
1554 pool->pools[i] = av_buffer_pool_init(size[i] + 16 + STRIDE_ALIGN - 1,
1555 CONFIG_MEMORY_POISONING ?
1558 if (!pool->pools[i]) {
1559 ret = AVERROR(ENOMEM);
1564 pool->format = frame->format;
1565 pool->width = frame->width;
1566 pool->height = frame->height;
1570 case AVMEDIA_TYPE_AUDIO: {
1571 int ch = frame->channels; //av_get_channel_layout_nb_channels(frame->channel_layout);
1572 int planar = av_sample_fmt_is_planar(frame->format);
1573 int planes = planar ? ch : 1;
1575 if (pool->format == frame->format && pool->planes == planes &&
1576 pool->channels == ch && frame->nb_samples == pool->samples)
1579 av_buffer_pool_uninit(&pool->pools[0]);
1580 ret = av_samples_get_buffer_size(&pool->linesize[0], ch,
1581 frame->nb_samples, frame->format, 0);
1585 pool->pools[0] = av_buffer_pool_init(pool->linesize[0], NULL);
1586 if (!pool->pools[0]) {
1587 ret = AVERROR(ENOMEM);
1591 pool->format = frame->format;
1592 pool->planes = planes;
1593 pool->channels = ch;
1594 pool->samples = frame->nb_samples;
1597 default: av_assert0(0);
1601 for (i = 0; i < 4; i++)
1602 av_buffer_pool_uninit(&pool->pools[i]);
1604 pool->planes = pool->channels = pool->samples = 0;
1605 pool->width = pool->height = 0;
1609 static int audio_get_buffer(AVCodecContext *avctx, AVFrame *frame)
1611 FramePool *pool = avctx->internal->pool;
1612 int planes = pool->planes;
1615 frame->linesize[0] = pool->linesize[0];
1617 if (planes > AV_NUM_DATA_POINTERS) {
1618 frame->extended_data = av_mallocz_array(planes, sizeof(*frame->extended_data));
1619 frame->nb_extended_buf = planes - AV_NUM_DATA_POINTERS;
1620 frame->extended_buf = av_mallocz_array(frame->nb_extended_buf,
1621 sizeof(*frame->extended_buf));
1622 if (!frame->extended_data || !frame->extended_buf) {
1623 av_freep(&frame->extended_data);
1624 av_freep(&frame->extended_buf);
1625 return AVERROR(ENOMEM);
1628 frame->extended_data = frame->data;
1629 av_assert0(frame->nb_extended_buf == 0);
1632 for (i = 0; i < FFMIN(planes, AV_NUM_DATA_POINTERS); i++) {
1633 frame->buf[i] = av_buffer_pool_get(pool->pools[0]);
1636 frame->extended_data[i] = frame->data[i] = frame->buf[i]->data;
1638 for (i = 0; i < frame->nb_extended_buf; i++) {
1639 frame->extended_buf[i] = av_buffer_pool_get(pool->pools[0]);
1640 if (!frame->extended_buf[i])
1642 frame->extended_data[i + AV_NUM_DATA_POINTERS] = frame->extended_buf[i]->data;
1645 if (avctx->debug & FF_DEBUG_BUFFERS)
1646 av_log(avctx, AV_LOG_DEBUG, "default_get_buffer called on frame %p", frame);
1650 av_frame_unref(frame);
1651 return AVERROR(ENOMEM);
1654 static int video_get_buffer(AVCodecContext *s, AVFrame *pic)
1656 FramePool *pool = s->internal->pool;
1657 const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(pic->format);
1660 if (pic->data[0] || pic->data[1] || pic->data[2] || pic->data[3]) {
1661 av_log(s, AV_LOG_ERROR, "pic->data[*]!=NULL in avcodec_default_get_buffer\n");
1666 av_log(s, AV_LOG_ERROR,
1667 "Unable to get pixel format descriptor for format %s\n",
1668 av_get_pix_fmt_name(pic->format));
1669 return AVERROR(EINVAL);
1672 memset(pic->data, 0, sizeof(pic->data));
1673 pic->extended_data = pic->data;
1675 for (i = 0; i < 4 && pool->pools[i]; i++) {
1676 pic->linesize[i] = pool->linesize[i];
1678 pic->buf[i] = av_buffer_pool_get(pool->pools[i]);
1682 pic->data[i] = pic->buf[i]->data;
1684 for (; i < AV_NUM_DATA_POINTERS; i++) {
1685 pic->data[i] = NULL;
1686 pic->linesize[i] = 0;
1688 if (desc->flags & AV_PIX_FMT_FLAG_PAL ||
1689 ((desc->flags & FF_PSEUDOPAL) && pic->data[1]))
1690 avpriv_set_systematic_pal2((uint32_t *)pic->data[1], pic->format);
1692 if (s->debug & FF_DEBUG_BUFFERS)
1693 av_log(s, AV_LOG_DEBUG, "default_get_buffer called on pic %p\n", pic);
1697 av_frame_unref(pic);
1698 return AVERROR(ENOMEM);
1701 int avcodec_default_get_buffer2(AVCodecContext *avctx, AVFrame *frame, int flags)
1705 if (avctx->hw_frames_ctx) {
1706 ret = av_hwframe_get_buffer(avctx->hw_frames_ctx, frame, 0);
1707 frame->width = avctx->coded_width;
1708 frame->height = avctx->coded_height;
1712 if ((ret = update_frame_pool(avctx, frame)) < 0)
1715 switch (avctx->codec_type) {
1716 case AVMEDIA_TYPE_VIDEO:
1717 return video_get_buffer(avctx, frame);
1718 case AVMEDIA_TYPE_AUDIO:
1719 return audio_get_buffer(avctx, frame);
1725 static int add_metadata_from_side_data(const AVPacket *avpkt, AVFrame *frame)
1728 const uint8_t *side_metadata;
1730 AVDictionary **frame_md = &frame->metadata;
1732 side_metadata = av_packet_get_side_data(avpkt,
1733 AV_PKT_DATA_STRINGS_METADATA, &size);
1734 return av_packet_unpack_dictionary(side_metadata, size, frame_md);
1737 int ff_decode_frame_props(AVCodecContext *avctx, AVFrame *frame)
1739 const AVPacket *pkt = avctx->internal->last_pkt_props;
1741 static const struct {
1742 enum AVPacketSideDataType packet;
1743 enum AVFrameSideDataType frame;
1745 { AV_PKT_DATA_REPLAYGAIN , AV_FRAME_DATA_REPLAYGAIN },
1746 { AV_PKT_DATA_DISPLAYMATRIX, AV_FRAME_DATA_DISPLAYMATRIX },
1747 { AV_PKT_DATA_SPHERICAL, AV_FRAME_DATA_SPHERICAL },
1748 { AV_PKT_DATA_STEREO3D, AV_FRAME_DATA_STEREO3D },
1749 { AV_PKT_DATA_AUDIO_SERVICE_TYPE, AV_FRAME_DATA_AUDIO_SERVICE_TYPE },
1750 { AV_PKT_DATA_MASTERING_DISPLAY_METADATA, AV_FRAME_DATA_MASTERING_DISPLAY_METADATA },
1751 { AV_PKT_DATA_CONTENT_LIGHT_LEVEL, AV_FRAME_DATA_CONTENT_LIGHT_LEVEL },
1752 { AV_PKT_DATA_A53_CC, AV_FRAME_DATA_A53_CC },
1756 frame->pts = pkt->pts;
1758 FF_DISABLE_DEPRECATION_WARNINGS
1759 frame->pkt_pts = pkt->pts;
1760 FF_ENABLE_DEPRECATION_WARNINGS
1762 frame->pkt_pos = pkt->pos;
1763 frame->pkt_duration = pkt->duration;
1764 frame->pkt_size = pkt->size;
1766 for (i = 0; i < FF_ARRAY_ELEMS(sd); i++) {
1768 uint8_t *packet_sd = av_packet_get_side_data(pkt, sd[i].packet, &size);
1770 AVFrameSideData *frame_sd = av_frame_new_side_data(frame,
1774 return AVERROR(ENOMEM);
1776 memcpy(frame_sd->data, packet_sd, size);
1779 add_metadata_from_side_data(pkt, frame);
1781 if (pkt->flags & AV_PKT_FLAG_DISCARD) {
1782 frame->flags |= AV_FRAME_FLAG_DISCARD;
1784 frame->flags = (frame->flags & ~AV_FRAME_FLAG_DISCARD);
1787 frame->reordered_opaque = avctx->reordered_opaque;
1789 if (frame->color_primaries == AVCOL_PRI_UNSPECIFIED)
1790 frame->color_primaries = avctx->color_primaries;
1791 if (frame->color_trc == AVCOL_TRC_UNSPECIFIED)
1792 frame->color_trc = avctx->color_trc;
1793 if (frame->colorspace == AVCOL_SPC_UNSPECIFIED)
1794 frame->colorspace = avctx->colorspace;
1795 if (frame->color_range == AVCOL_RANGE_UNSPECIFIED)
1796 frame->color_range = avctx->color_range;
1797 if (frame->chroma_location == AVCHROMA_LOC_UNSPECIFIED)
1798 frame->chroma_location = avctx->chroma_sample_location;
1800 switch (avctx->codec->type) {
1801 case AVMEDIA_TYPE_VIDEO:
1802 frame->format = avctx->pix_fmt;
1803 if (!frame->sample_aspect_ratio.num)
1804 frame->sample_aspect_ratio = avctx->sample_aspect_ratio;
1806 if (frame->width && frame->height &&
1807 av_image_check_sar(frame->width, frame->height,
1808 frame->sample_aspect_ratio) < 0) {
1809 av_log(avctx, AV_LOG_WARNING, "ignoring invalid SAR: %u/%u\n",
1810 frame->sample_aspect_ratio.num,
1811 frame->sample_aspect_ratio.den);
1812 frame->sample_aspect_ratio = (AVRational){ 0, 1 };
1816 case AVMEDIA_TYPE_AUDIO:
1817 if (!frame->sample_rate)
1818 frame->sample_rate = avctx->sample_rate;
1819 if (frame->format < 0)
1820 frame->format = avctx->sample_fmt;
1821 if (!frame->channel_layout) {
1822 if (avctx->channel_layout) {
1823 if (av_get_channel_layout_nb_channels(avctx->channel_layout) !=
1825 av_log(avctx, AV_LOG_ERROR, "Inconsistent channel "
1826 "configuration.\n");
1827 return AVERROR(EINVAL);
1830 frame->channel_layout = avctx->channel_layout;
1832 if (avctx->channels > FF_SANE_NB_CHANNELS) {
1833 av_log(avctx, AV_LOG_ERROR, "Too many channels: %d.\n",
1835 return AVERROR(ENOSYS);
1839 frame->channels = avctx->channels;
1845 static void validate_avframe_allocation(AVCodecContext *avctx, AVFrame *frame)
1847 if (avctx->codec_type == AVMEDIA_TYPE_VIDEO) {
1849 int num_planes = av_pix_fmt_count_planes(frame->format);
1850 const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(frame->format);
1851 int flags = desc ? desc->flags : 0;
1852 if (num_planes == 1 && (flags & AV_PIX_FMT_FLAG_PAL))
1854 if ((flags & FF_PSEUDOPAL) && frame->data[1])
1856 for (i = 0; i < num_planes; i++) {
1857 av_assert0(frame->data[i]);
1859 // For formats without data like hwaccel allow unused pointers to be non-NULL.
1860 for (i = num_planes; num_planes > 0 && i < FF_ARRAY_ELEMS(frame->data); i++) {
1862 av_log(avctx, AV_LOG_ERROR, "Buffer returned by get_buffer2() did not zero unused plane pointers\n");
1863 frame->data[i] = NULL;
1868 static void decode_data_free(void *opaque, uint8_t *data)
1870 FrameDecodeData *fdd = (FrameDecodeData*)data;
1872 if (fdd->post_process_opaque_free)
1873 fdd->post_process_opaque_free(fdd->post_process_opaque);
1875 if (fdd->hwaccel_priv_free)
1876 fdd->hwaccel_priv_free(fdd->hwaccel_priv);
1881 int ff_attach_decode_data(AVFrame *frame)
1883 AVBufferRef *fdd_buf;
1884 FrameDecodeData *fdd;
1886 av_assert1(!frame->private_ref);
1887 av_buffer_unref(&frame->private_ref);
1889 fdd = av_mallocz(sizeof(*fdd));
1891 return AVERROR(ENOMEM);
1893 fdd_buf = av_buffer_create((uint8_t*)fdd, sizeof(*fdd), decode_data_free,
1894 NULL, AV_BUFFER_FLAG_READONLY);
1897 return AVERROR(ENOMEM);
1900 frame->private_ref = fdd_buf;
1905 static int get_buffer_internal(AVCodecContext *avctx, AVFrame *frame, int flags)
1907 const AVHWAccel *hwaccel = avctx->hwaccel;
1908 int override_dimensions = 1;
1911 if (avctx->codec_type == AVMEDIA_TYPE_VIDEO) {
1912 if ((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) {
1913 av_log(avctx, AV_LOG_ERROR, "video_get_buffer: image parameters invalid\n");
1914 return AVERROR(EINVAL);
1917 if (frame->width <= 0 || frame->height <= 0) {
1918 frame->width = FFMAX(avctx->width, AV_CEIL_RSHIFT(avctx->coded_width, avctx->lowres));
1919 frame->height = FFMAX(avctx->height, AV_CEIL_RSHIFT(avctx->coded_height, avctx->lowres));
1920 override_dimensions = 0;
1923 if (frame->data[0] || frame->data[1] || frame->data[2] || frame->data[3]) {
1924 av_log(avctx, AV_LOG_ERROR, "pic->data[*]!=NULL in get_buffer_internal\n");
1925 return AVERROR(EINVAL);
1927 } else if (avctx->codec_type == AVMEDIA_TYPE_AUDIO) {
1928 if (frame->nb_samples * (int64_t)avctx->channels > avctx->max_samples) {
1929 av_log(avctx, AV_LOG_ERROR, "samples per frame %d, exceeds max_samples %"PRId64"\n", frame->nb_samples, avctx->max_samples);
1930 return AVERROR(EINVAL);
1933 ret = ff_decode_frame_props(avctx, frame);
1938 if (hwaccel->alloc_frame) {
1939 ret = hwaccel->alloc_frame(avctx, frame);
1943 avctx->sw_pix_fmt = avctx->pix_fmt;
1945 ret = avctx->get_buffer2(avctx, frame, flags);
1949 validate_avframe_allocation(avctx, frame);
1951 ret = ff_attach_decode_data(frame);
1956 if (avctx->codec_type == AVMEDIA_TYPE_VIDEO && !override_dimensions &&
1957 !(avctx->codec->caps_internal & FF_CODEC_CAP_EXPORTS_CROPPING)) {
1958 frame->width = avctx->width;
1959 frame->height = avctx->height;
1963 av_frame_unref(frame);
1968 int ff_get_buffer(AVCodecContext *avctx, AVFrame *frame, int flags)
1970 int ret = get_buffer_internal(avctx, frame, flags);
1972 av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n");
1973 frame->width = frame->height = 0;
1978 static int reget_buffer_internal(AVCodecContext *avctx, AVFrame *frame, int flags)
1983 av_assert0(avctx->codec_type == AVMEDIA_TYPE_VIDEO);
1985 if (frame->data[0] && (frame->width != avctx->width || frame->height != avctx->height || frame->format != avctx->pix_fmt)) {
1986 av_log(avctx, AV_LOG_WARNING, "Picture changed from size:%dx%d fmt:%s to size:%dx%d fmt:%s in reget buffer()\n",
1987 frame->width, frame->height, av_get_pix_fmt_name(frame->format), avctx->width, avctx->height, av_get_pix_fmt_name(avctx->pix_fmt));
1988 av_frame_unref(frame);
1991 if (!frame->data[0])
1992 return ff_get_buffer(avctx, frame, AV_GET_BUFFER_FLAG_REF);
1994 if ((flags & FF_REGET_BUFFER_FLAG_READONLY) || av_frame_is_writable(frame))
1995 return ff_decode_frame_props(avctx, frame);
1997 tmp = av_frame_alloc();
1999 return AVERROR(ENOMEM);
2001 av_frame_move_ref(tmp, frame);
2003 ret = ff_get_buffer(avctx, frame, AV_GET_BUFFER_FLAG_REF);
2005 av_frame_free(&tmp);
2009 av_frame_copy(frame, tmp);
2010 av_frame_free(&tmp);
2015 int ff_reget_buffer(AVCodecContext *avctx, AVFrame *frame, int flags)
2017 int ret = reget_buffer_internal(avctx, frame, flags);
2019 av_log(avctx, AV_LOG_ERROR, "reget_buffer() failed\n");
2023 static void bsfs_flush(AVCodecContext *avctx)
2025 DecodeFilterContext *s = &avctx->internal->filter;
2027 for (int i = 0; i < s->nb_bsfs; i++)
2028 av_bsf_flush(s->bsfs[i]);
2031 void avcodec_flush_buffers(AVCodecContext *avctx)
2033 avctx->internal->draining = 0;
2034 avctx->internal->draining_done = 0;
2035 avctx->internal->nb_draining_errors = 0;
2036 av_frame_unref(avctx->internal->buffer_frame);
2037 av_frame_unref(avctx->internal->compat_decode_frame);
2038 av_packet_unref(avctx->internal->buffer_pkt);
2039 avctx->internal->buffer_pkt_valid = 0;
2041 av_packet_unref(avctx->internal->ds.in_pkt);
2043 if (HAVE_THREADS && avctx->active_thread_type & FF_THREAD_FRAME)
2044 ff_thread_flush(avctx);
2045 else if (avctx->codec->flush)
2046 avctx->codec->flush(avctx);
2048 avctx->pts_correction_last_pts =
2049 avctx->pts_correction_last_dts = INT64_MIN;
2053 if (!avctx->refcounted_frames)
2054 av_frame_unref(avctx->internal->to_free);
2057 void ff_decode_bsfs_uninit(AVCodecContext *avctx)
2059 DecodeFilterContext *s = &avctx->internal->filter;
2062 for (i = 0; i < s->nb_bsfs; i++)
2063 av_bsf_free(&s->bsfs[i]);