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 */
306 } else if (ret < 0 && ret != AVERROR_EOF) {
310 /* got a packet or EOF -- pass it to the caller or to the next filter
312 if (idx == s->nb_bsfs - 1) {
316 ret = av_bsf_send_packet(s->bsfs[idx], ret < 0 ? NULL : pkt);
318 av_log(avctx, AV_LOG_ERROR,
319 "Error pre-processing a packet before decoding\n");
320 av_packet_unref(pkt);
326 return AVERROR(EAGAIN);
329 int ff_decode_get_packet(AVCodecContext *avctx, AVPacket *pkt)
331 AVCodecInternal *avci = avctx->internal;
337 ret = bsfs_poll(avctx, pkt);
338 if (ret == AVERROR_EOF)
343 ret = extract_packet_props(avctx->internal, pkt);
347 ret = apply_param_change(avctx, pkt);
351 if (avctx->codec->receive_frame)
352 avci->compat_decode_consumed += pkt->size;
356 av_packet_unref(pkt);
361 * Attempt to guess proper monotonic timestamps for decoded video frames
362 * which might have incorrect times. Input timestamps may wrap around, in
363 * which case the output will as well.
365 * @param pts the pts field of the decoded AVPacket, as passed through
367 * @param dts the dts field of the decoded AVPacket
368 * @return one of the input values, may be AV_NOPTS_VALUE
370 static int64_t guess_correct_pts(AVCodecContext *ctx,
371 int64_t reordered_pts, int64_t dts)
373 int64_t pts = AV_NOPTS_VALUE;
375 if (dts != AV_NOPTS_VALUE) {
376 ctx->pts_correction_num_faulty_dts += dts <= ctx->pts_correction_last_dts;
377 ctx->pts_correction_last_dts = dts;
378 } else if (reordered_pts != AV_NOPTS_VALUE)
379 ctx->pts_correction_last_dts = reordered_pts;
381 if (reordered_pts != AV_NOPTS_VALUE) {
382 ctx->pts_correction_num_faulty_pts += reordered_pts <= ctx->pts_correction_last_pts;
383 ctx->pts_correction_last_pts = reordered_pts;
384 } else if(dts != AV_NOPTS_VALUE)
385 ctx->pts_correction_last_pts = dts;
387 if ((ctx->pts_correction_num_faulty_pts<=ctx->pts_correction_num_faulty_dts || dts == AV_NOPTS_VALUE)
388 && reordered_pts != AV_NOPTS_VALUE)
397 * The core of the receive_frame_wrapper for the decoders implementing
398 * the simple API. Certain decoders might consume partial packets without
399 * returning any output, so this function needs to be called in a loop until it
402 static int decode_simple_internal(AVCodecContext *avctx, AVFrame *frame)
404 AVCodecInternal *avci = avctx->internal;
405 DecodeSimpleContext *ds = &avci->ds;
406 AVPacket *pkt = ds->in_pkt;
407 // copy to ensure we do not change pkt
408 int got_frame, actual_got_frame;
411 if (!pkt->data && !avci->draining) {
412 av_packet_unref(pkt);
413 ret = ff_decode_get_packet(avctx, pkt);
414 if (ret < 0 && ret != AVERROR_EOF)
418 // Some codecs (at least wma lossless) will crash when feeding drain packets
419 // after EOF was signaled.
420 if (avci->draining_done)
424 !(avctx->codec->capabilities & AV_CODEC_CAP_DELAY ||
425 avctx->active_thread_type & FF_THREAD_FRAME))
430 if (HAVE_THREADS && avctx->active_thread_type & FF_THREAD_FRAME) {
431 ret = ff_thread_decode_frame(avctx, frame, &got_frame, pkt);
433 ret = avctx->codec->decode(avctx, frame, &got_frame, pkt);
435 if (!(avctx->codec->caps_internal & FF_CODEC_CAP_SETS_PKT_DTS))
436 frame->pkt_dts = pkt->dts;
437 if (avctx->codec->type == AVMEDIA_TYPE_VIDEO) {
438 if(!avctx->has_b_frames)
439 frame->pkt_pos = pkt->pos;
440 //FIXME these should be under if(!avctx->has_b_frames)
441 /* get_buffer is supposed to set frame parameters */
442 if (!(avctx->codec->capabilities & AV_CODEC_CAP_DR1)) {
443 if (!frame->sample_aspect_ratio.num) frame->sample_aspect_ratio = avctx->sample_aspect_ratio;
444 if (!frame->width) frame->width = avctx->width;
445 if (!frame->height) frame->height = avctx->height;
446 if (frame->format == AV_PIX_FMT_NONE) frame->format = avctx->pix_fmt;
451 actual_got_frame = got_frame;
453 if (avctx->codec->type == AVMEDIA_TYPE_VIDEO) {
454 if (frame->flags & AV_FRAME_FLAG_DISCARD)
457 frame->best_effort_timestamp = guess_correct_pts(avctx,
460 } else if (avctx->codec->type == AVMEDIA_TYPE_AUDIO) {
463 uint32_t discard_padding = 0;
464 uint8_t skip_reason = 0;
465 uint8_t discard_reason = 0;
467 if (ret >= 0 && got_frame) {
468 frame->best_effort_timestamp = guess_correct_pts(avctx,
471 if (frame->format == AV_SAMPLE_FMT_NONE)
472 frame->format = avctx->sample_fmt;
473 if (!frame->channel_layout)
474 frame->channel_layout = avctx->channel_layout;
475 if (!frame->channels)
476 frame->channels = avctx->channels;
477 if (!frame->sample_rate)
478 frame->sample_rate = avctx->sample_rate;
481 side= av_packet_get_side_data(avci->last_pkt_props, AV_PKT_DATA_SKIP_SAMPLES, &side_size);
482 if(side && side_size>=10) {
483 avctx->internal->skip_samples = AV_RL32(side) * avctx->internal->skip_samples_multiplier;
484 discard_padding = AV_RL32(side + 4);
485 av_log(avctx, AV_LOG_DEBUG, "skip %d / discard %d samples due to side data\n",
486 avctx->internal->skip_samples, (int)discard_padding);
487 skip_reason = AV_RL8(side + 8);
488 discard_reason = AV_RL8(side + 9);
491 if ((frame->flags & AV_FRAME_FLAG_DISCARD) && got_frame &&
492 !(avctx->flags2 & AV_CODEC_FLAG2_SKIP_MANUAL)) {
493 avctx->internal->skip_samples = FFMAX(0, avctx->internal->skip_samples - frame->nb_samples);
497 if (avctx->internal->skip_samples > 0 && got_frame &&
498 !(avctx->flags2 & AV_CODEC_FLAG2_SKIP_MANUAL)) {
499 if(frame->nb_samples <= avctx->internal->skip_samples){
501 avctx->internal->skip_samples -= frame->nb_samples;
502 av_log(avctx, AV_LOG_DEBUG, "skip whole frame, skip left: %d\n",
503 avctx->internal->skip_samples);
505 av_samples_copy(frame->extended_data, frame->extended_data, 0, avctx->internal->skip_samples,
506 frame->nb_samples - avctx->internal->skip_samples, avctx->channels, frame->format);
507 if(avctx->pkt_timebase.num && avctx->sample_rate) {
508 int64_t diff_ts = av_rescale_q(avctx->internal->skip_samples,
509 (AVRational){1, avctx->sample_rate},
510 avctx->pkt_timebase);
511 if(frame->pts!=AV_NOPTS_VALUE)
512 frame->pts += diff_ts;
514 FF_DISABLE_DEPRECATION_WARNINGS
515 if(frame->pkt_pts!=AV_NOPTS_VALUE)
516 frame->pkt_pts += diff_ts;
517 FF_ENABLE_DEPRECATION_WARNINGS
519 if(frame->pkt_dts!=AV_NOPTS_VALUE)
520 frame->pkt_dts += diff_ts;
521 if (frame->pkt_duration >= diff_ts)
522 frame->pkt_duration -= diff_ts;
524 av_log(avctx, AV_LOG_WARNING, "Could not update timestamps for skipped samples.\n");
526 av_log(avctx, AV_LOG_DEBUG, "skip %d/%d samples\n",
527 avctx->internal->skip_samples, frame->nb_samples);
528 frame->nb_samples -= avctx->internal->skip_samples;
529 avctx->internal->skip_samples = 0;
533 if (discard_padding > 0 && discard_padding <= frame->nb_samples && got_frame &&
534 !(avctx->flags2 & AV_CODEC_FLAG2_SKIP_MANUAL)) {
535 if (discard_padding == frame->nb_samples) {
538 if(avctx->pkt_timebase.num && avctx->sample_rate) {
539 int64_t diff_ts = av_rescale_q(frame->nb_samples - discard_padding,
540 (AVRational){1, avctx->sample_rate},
541 avctx->pkt_timebase);
542 frame->pkt_duration = diff_ts;
544 av_log(avctx, AV_LOG_WARNING, "Could not update timestamps for discarded samples.\n");
546 av_log(avctx, AV_LOG_DEBUG, "discard %d/%d samples\n",
547 (int)discard_padding, frame->nb_samples);
548 frame->nb_samples -= discard_padding;
552 if ((avctx->flags2 & AV_CODEC_FLAG2_SKIP_MANUAL) && got_frame) {
553 AVFrameSideData *fside = av_frame_new_side_data(frame, AV_FRAME_DATA_SKIP_SAMPLES, 10);
555 AV_WL32(fside->data, avctx->internal->skip_samples);
556 AV_WL32(fside->data + 4, discard_padding);
557 AV_WL8(fside->data + 8, skip_reason);
558 AV_WL8(fside->data + 9, discard_reason);
559 avctx->internal->skip_samples = 0;
564 if (avctx->codec->type == AVMEDIA_TYPE_AUDIO &&
565 !avci->showed_multi_packet_warning &&
566 ret >= 0 && ret != pkt->size && !(avctx->codec->capabilities & AV_CODEC_CAP_SUBFRAMES)) {
567 av_log(avctx, AV_LOG_WARNING, "Multiple frames in a packet.\n");
568 avci->showed_multi_packet_warning = 1;
572 av_frame_unref(frame);
574 if (ret >= 0 && avctx->codec->type == AVMEDIA_TYPE_VIDEO && !(avctx->flags & AV_CODEC_FLAG_TRUNCATED))
577 #if FF_API_AVCTX_TIMEBASE
578 if (avctx->framerate.num > 0 && avctx->framerate.den > 0)
579 avctx->time_base = av_inv_q(av_mul_q(avctx->framerate, (AVRational){avctx->ticks_per_frame, 1}));
582 /* do not stop draining when actual_got_frame != 0 or ret < 0 */
583 /* got_frame == 0 but actual_got_frame != 0 when frame is discarded */
584 if (avctx->internal->draining && !actual_got_frame) {
586 /* prevent infinite loop if a decoder wrongly always return error on draining */
587 /* reasonable nb_errors_max = maximum b frames + thread count */
588 int nb_errors_max = 20 + (HAVE_THREADS && avctx->active_thread_type & FF_THREAD_FRAME ?
589 avctx->thread_count : 1);
591 if (avci->nb_draining_errors++ >= nb_errors_max) {
592 av_log(avctx, AV_LOG_ERROR, "Too many errors when draining, this is a bug. "
593 "Stop draining and force EOF.\n");
594 avci->draining_done = 1;
598 avci->draining_done = 1;
602 avci->compat_decode_consumed += ret;
604 if (ret >= pkt->size || ret < 0) {
605 av_packet_unref(pkt);
609 pkt->data += consumed;
610 pkt->size -= consumed;
611 avci->last_pkt_props->size -= consumed; // See extract_packet_props() comment.
612 pkt->pts = AV_NOPTS_VALUE;
613 pkt->dts = AV_NOPTS_VALUE;
614 avci->last_pkt_props->pts = AV_NOPTS_VALUE;
615 avci->last_pkt_props->dts = AV_NOPTS_VALUE;
619 av_assert0(frame->buf[0]);
621 return ret < 0 ? ret : 0;
624 static int decode_simple_receive_frame(AVCodecContext *avctx, AVFrame *frame)
628 while (!frame->buf[0]) {
629 ret = decode_simple_internal(avctx, frame);
637 static int decode_receive_frame_internal(AVCodecContext *avctx, AVFrame *frame)
639 AVCodecInternal *avci = avctx->internal;
642 av_assert0(!frame->buf[0]);
644 if (avctx->codec->receive_frame)
645 ret = avctx->codec->receive_frame(avctx, frame);
647 ret = decode_simple_receive_frame(avctx, frame);
649 if (ret == AVERROR_EOF)
650 avci->draining_done = 1;
653 /* the only case where decode data is not set should be decoders
654 * that do not call ff_get_buffer() */
655 av_assert0((frame->private_ref && frame->private_ref->size == sizeof(FrameDecodeData)) ||
656 !(avctx->codec->capabilities & AV_CODEC_CAP_DR1));
658 if (frame->private_ref) {
659 FrameDecodeData *fdd = (FrameDecodeData*)frame->private_ref->data;
661 if (fdd->post_process) {
662 ret = fdd->post_process(avctx, frame);
664 av_frame_unref(frame);
671 /* free the per-frame decode data */
672 av_buffer_unref(&frame->private_ref);
677 int attribute_align_arg avcodec_send_packet(AVCodecContext *avctx, const AVPacket *avpkt)
679 AVCodecInternal *avci = avctx->internal;
682 if (!avcodec_is_open(avctx) || !av_codec_is_decoder(avctx->codec))
683 return AVERROR(EINVAL);
685 if (avctx->internal->draining)
688 if (avpkt && !avpkt->size && avpkt->data)
689 return AVERROR(EINVAL);
691 av_packet_unref(avci->buffer_pkt);
692 if (avpkt && (avpkt->data || avpkt->side_data_elems)) {
693 ret = av_packet_ref(avci->buffer_pkt, avpkt);
698 ret = av_bsf_send_packet(avci->filter.bsfs[0], avci->buffer_pkt);
700 av_packet_unref(avci->buffer_pkt);
704 if (!avci->buffer_frame->buf[0]) {
705 ret = decode_receive_frame_internal(avctx, avci->buffer_frame);
706 if (ret < 0 && ret != AVERROR(EAGAIN) && ret != AVERROR_EOF)
713 static int apply_cropping(AVCodecContext *avctx, AVFrame *frame)
715 /* make sure we are noisy about decoders returning invalid cropping data */
716 if (frame->crop_left >= INT_MAX - frame->crop_right ||
717 frame->crop_top >= INT_MAX - frame->crop_bottom ||
718 (frame->crop_left + frame->crop_right) >= frame->width ||
719 (frame->crop_top + frame->crop_bottom) >= frame->height) {
720 av_log(avctx, AV_LOG_WARNING,
721 "Invalid cropping information set by a decoder: "
722 "%"SIZE_SPECIFIER"/%"SIZE_SPECIFIER"/%"SIZE_SPECIFIER"/%"SIZE_SPECIFIER" "
723 "(frame size %dx%d). This is a bug, please report it\n",
724 frame->crop_left, frame->crop_right, frame->crop_top, frame->crop_bottom,
725 frame->width, frame->height);
726 frame->crop_left = 0;
727 frame->crop_right = 0;
729 frame->crop_bottom = 0;
733 if (!avctx->apply_cropping)
736 return av_frame_apply_cropping(frame, avctx->flags & AV_CODEC_FLAG_UNALIGNED ?
737 AV_FRAME_CROP_UNALIGNED : 0);
740 int attribute_align_arg avcodec_receive_frame(AVCodecContext *avctx, AVFrame *frame)
742 AVCodecInternal *avci = avctx->internal;
745 av_frame_unref(frame);
747 if (!avcodec_is_open(avctx) || !av_codec_is_decoder(avctx->codec))
748 return AVERROR(EINVAL);
750 if (avci->buffer_frame->buf[0]) {
751 av_frame_move_ref(frame, avci->buffer_frame);
753 ret = decode_receive_frame_internal(avctx, frame);
758 if (avctx->codec_type == AVMEDIA_TYPE_VIDEO) {
759 ret = apply_cropping(avctx, frame);
761 av_frame_unref(frame);
766 avctx->frame_number++;
771 static int compat_decode(AVCodecContext *avctx, AVFrame *frame,
772 int *got_frame, const AVPacket *pkt)
774 AVCodecInternal *avci = avctx->internal;
777 av_assert0(avci->compat_decode_consumed == 0);
779 if (avci->draining_done && pkt && pkt->size != 0) {
780 av_log(avctx, AV_LOG_WARNING, "Got unexpected packet after EOF\n");
781 avcodec_flush_buffers(avctx);
785 avci->compat_decode = 1;
787 if (avci->compat_decode_partial_size > 0 &&
788 avci->compat_decode_partial_size != pkt->size) {
789 av_log(avctx, AV_LOG_ERROR,
790 "Got unexpected packet size after a partial decode\n");
791 ret = AVERROR(EINVAL);
795 if (!avci->compat_decode_partial_size) {
796 ret = avcodec_send_packet(avctx, pkt);
797 if (ret == AVERROR_EOF)
799 else if (ret == AVERROR(EAGAIN)) {
800 /* we fully drain all the output in each decode call, so this should not
809 ret = avcodec_receive_frame(avctx, frame);
811 if (ret == AVERROR(EAGAIN) || ret == AVERROR_EOF)
816 if (frame != avci->compat_decode_frame) {
817 if (!avctx->refcounted_frames) {
818 ret = unrefcount_frame(avci, frame);
824 frame = avci->compat_decode_frame;
826 if (!avci->compat_decode_warned) {
827 av_log(avctx, AV_LOG_WARNING, "The deprecated avcodec_decode_* "
828 "API cannot return all the frames for this decoder. "
829 "Some frames will be dropped. Update your code to the "
830 "new decoding API to fix this.\n");
831 avci->compat_decode_warned = 1;
835 if (avci->draining || (!avctx->codec->bsfs && avci->compat_decode_consumed < pkt->size))
841 /* if there are any bsfs then assume full packet is always consumed */
842 if (avctx->codec->bsfs)
845 ret = FFMIN(avci->compat_decode_consumed, pkt->size);
847 avci->compat_decode_consumed = 0;
848 avci->compat_decode_partial_size = (ret >= 0) ? pkt->size - ret : 0;
853 int attribute_align_arg avcodec_decode_video2(AVCodecContext *avctx, AVFrame *picture,
854 int *got_picture_ptr,
855 const AVPacket *avpkt)
857 return compat_decode(avctx, picture, got_picture_ptr, avpkt);
860 int attribute_align_arg avcodec_decode_audio4(AVCodecContext *avctx,
863 const AVPacket *avpkt)
865 return compat_decode(avctx, frame, got_frame_ptr, avpkt);
868 static void get_subtitle_defaults(AVSubtitle *sub)
870 memset(sub, 0, sizeof(*sub));
871 sub->pts = AV_NOPTS_VALUE;
874 #define UTF8_MAX_BYTES 4 /* 5 and 6 bytes sequences should not be used */
875 static int recode_subtitle(AVCodecContext *avctx,
876 AVPacket *outpkt, const AVPacket *inpkt)
879 iconv_t cd = (iconv_t)-1;
886 if (avctx->sub_charenc_mode != FF_SUB_CHARENC_MODE_PRE_DECODER || inpkt->size == 0)
890 cd = iconv_open("UTF-8", avctx->sub_charenc);
891 av_assert0(cd != (iconv_t)-1);
896 if (inl >= INT_MAX / UTF8_MAX_BYTES - AV_INPUT_BUFFER_PADDING_SIZE) {
897 av_log(avctx, AV_LOG_ERROR, "Subtitles packet is too big for recoding\n");
898 ret = AVERROR(ENOMEM);
902 ret = av_new_packet(&tmp, inl * UTF8_MAX_BYTES);
905 outpkt->buf = tmp.buf;
906 outpkt->data = tmp.data;
907 outpkt->size = tmp.size;
911 if (iconv(cd, &inb, &inl, &outb, &outl) == (size_t)-1 ||
912 iconv(cd, NULL, NULL, &outb, &outl) == (size_t)-1 ||
913 outl >= outpkt->size || inl != 0) {
914 ret = FFMIN(AVERROR(errno), -1);
915 av_log(avctx, AV_LOG_ERROR, "Unable to recode subtitle event \"%s\" "
916 "from %s to UTF-8\n", inpkt->data, avctx->sub_charenc);
917 av_packet_unref(&tmp);
920 outpkt->size -= outl;
921 memset(outpkt->data + outpkt->size, 0, outl);
924 if (cd != (iconv_t)-1)
928 av_log(avctx, AV_LOG_ERROR, "requesting subtitles recoding without iconv");
929 return AVERROR(EINVAL);
933 static int utf8_check(const uint8_t *str)
936 uint32_t codepoint, min;
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 */)
952 #if FF_API_ASS_TIMING
953 static void insert_ts(AVBPrint *buf, int ts)
956 av_bprintf(buf, "9:59:59.99,");
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);
967 static int convert_sub_to_old_ass_form(AVSubtitle *sub, const AVPacket *pkt, AVRational tb)
972 av_bprint_init(&buf, 0, AV_BPRINT_SIZE_UNLIMITED);
974 for (i = 0; i < sub->num_rects; i++) {
977 AVSubtitleRect *rect = sub->rects[i];
978 int ts_start, ts_duration = -1;
981 if (rect->type != SUBTITLE_ASS || !strncmp(rect->ass, "Dialogue: ", 10))
984 av_bprint_clear(&buf);
987 dialog = strchr(rect->ass, ',');
992 /* extract Layer or Marked */
993 layer = strtol(dialog, (char**)&dialog, 10);
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);
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);
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);
1016 av_freep(&rect->ass);
1017 rect->ass = final_dialog;
1020 av_bprint_finalize(&buf, NULL);
1025 int avcodec_decode_subtitle2(AVCodecContext *avctx, AVSubtitle *sub,
1031 if (!avpkt->data && avpkt->size) {
1032 av_log(avctx, AV_LOG_ERROR, "invalid packet: NULL data, size != 0\n");
1033 return AVERROR(EINVAL);
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);
1043 get_subtitle_defaults(sub);
1045 if ((avctx->codec->capabilities & AV_CODEC_CAP_DELAY) || avpkt->size) {
1046 AVPacket pkt_recoded = *avpkt;
1048 ret = recode_subtitle(avctx, &pkt_recoded, avpkt);
1052 ret = extract_packet_props(avctx->internal, &pkt_recoded);
1056 if (avctx->pkt_timebase.num && avpkt->pts != AV_NOPTS_VALUE)
1057 sub->pts = av_rescale_q(avpkt->pts,
1058 avctx->pkt_timebase, AV_TIME_BASE_Q);
1059 ret = avctx->codec->decode(avctx, sub, got_sub_ptr, &pkt_recoded);
1060 av_assert1((ret >= 0) >= !!*got_sub_ptr &&
1061 !!*got_sub_ptr >= !!sub->num_rects);
1063 #if FF_API_ASS_TIMING
1064 if (avctx->sub_text_format == FF_SUB_TEXT_FMT_ASS_WITH_TIMINGS
1065 && *got_sub_ptr && sub->num_rects) {
1066 const AVRational tb = avctx->pkt_timebase.num ? avctx->pkt_timebase
1068 int err = convert_sub_to_old_ass_form(sub, avpkt, tb);
1074 if (sub->num_rects && !sub->end_display_time && avpkt->duration &&
1075 avctx->pkt_timebase.num) {
1076 AVRational ms = { 1, 1000 };
1077 sub->end_display_time = av_rescale_q(avpkt->duration,
1078 avctx->pkt_timebase, ms);
1081 if (avctx->codec_descriptor->props & AV_CODEC_PROP_BITMAP_SUB)
1083 else if (avctx->codec_descriptor->props & AV_CODEC_PROP_TEXT_SUB)
1086 for (i = 0; i < sub->num_rects; i++) {
1087 if (avctx->sub_charenc_mode != FF_SUB_CHARENC_MODE_IGNORE &&
1088 sub->rects[i]->ass && !utf8_check(sub->rects[i]->ass)) {
1089 av_log(avctx, AV_LOG_ERROR,
1090 "Invalid UTF-8 in decoded subtitles text; "
1091 "maybe missing -sub_charenc option\n");
1092 avsubtitle_free(sub);
1093 ret = AVERROR_INVALIDDATA;
1098 if (avpkt->data != pkt_recoded.data) { // did we recode?
1099 /* prevent from destroying side data from original packet */
1100 pkt_recoded.side_data = NULL;
1101 pkt_recoded.side_data_elems = 0;
1103 av_packet_unref(&pkt_recoded);
1108 avctx->frame_number++;
1114 enum AVPixelFormat avcodec_default_get_format(struct AVCodecContext *avctx,
1115 const enum AVPixelFormat *fmt)
1117 const AVPixFmtDescriptor *desc;
1118 const AVCodecHWConfig *config;
1121 // If a device was supplied when the codec was opened, assume that the
1122 // user wants to use it.
1123 if (avctx->hw_device_ctx && avctx->codec->hw_configs) {
1124 AVHWDeviceContext *device_ctx =
1125 (AVHWDeviceContext*)avctx->hw_device_ctx->data;
1127 config = &avctx->codec->hw_configs[i]->public;
1130 if (!(config->methods &
1131 AV_CODEC_HW_CONFIG_METHOD_HW_DEVICE_CTX))
1133 if (device_ctx->type != config->device_type)
1135 for (n = 0; fmt[n] != AV_PIX_FMT_NONE; n++) {
1136 if (config->pix_fmt == fmt[n])
1141 // No device or other setup, so we have to choose from things which
1142 // don't any other external information.
1144 // If the last element of the list is a software format, choose it
1145 // (this should be best software format if any exist).
1146 for (n = 0; fmt[n] != AV_PIX_FMT_NONE; n++);
1147 desc = av_pix_fmt_desc_get(fmt[n - 1]);
1148 if (!(desc->flags & AV_PIX_FMT_FLAG_HWACCEL))
1151 // Finally, traverse the list in order and choose the first entry
1152 // with no external dependencies (if there is no hardware configuration
1153 // information available then this just picks the first entry).
1154 for (n = 0; fmt[n] != AV_PIX_FMT_NONE; n++) {
1156 config = avcodec_get_hw_config(avctx->codec, i);
1159 if (config->pix_fmt == fmt[n])
1163 // No specific config available, so the decoder must be able
1164 // to handle this format without any additional setup.
1167 if (config->methods & AV_CODEC_HW_CONFIG_METHOD_INTERNAL) {
1168 // Usable with only internal setup.
1173 // Nothing is usable, give up.
1174 return AV_PIX_FMT_NONE;
1177 int ff_decode_get_hw_frames_ctx(AVCodecContext *avctx,
1178 enum AVHWDeviceType dev_type)
1180 AVHWDeviceContext *device_ctx;
1181 AVHWFramesContext *frames_ctx;
1184 if (!avctx->hwaccel)
1185 return AVERROR(ENOSYS);
1187 if (avctx->hw_frames_ctx)
1189 if (!avctx->hw_device_ctx) {
1190 av_log(avctx, AV_LOG_ERROR, "A hardware frames or device context is "
1191 "required for hardware accelerated decoding.\n");
1192 return AVERROR(EINVAL);
1195 device_ctx = (AVHWDeviceContext *)avctx->hw_device_ctx->data;
1196 if (device_ctx->type != dev_type) {
1197 av_log(avctx, AV_LOG_ERROR, "Device type %s expected for hardware "
1198 "decoding, but got %s.\n", av_hwdevice_get_type_name(dev_type),
1199 av_hwdevice_get_type_name(device_ctx->type));
1200 return AVERROR(EINVAL);
1203 ret = avcodec_get_hw_frames_parameters(avctx,
1204 avctx->hw_device_ctx,
1205 avctx->hwaccel->pix_fmt,
1206 &avctx->hw_frames_ctx);
1210 frames_ctx = (AVHWFramesContext*)avctx->hw_frames_ctx->data;
1213 if (frames_ctx->initial_pool_size) {
1214 // We guarantee 4 base work surfaces. The function above guarantees 1
1215 // (the absolute minimum), so add the missing count.
1216 frames_ctx->initial_pool_size += 3;
1219 ret = av_hwframe_ctx_init(avctx->hw_frames_ctx);
1221 av_buffer_unref(&avctx->hw_frames_ctx);
1228 int avcodec_get_hw_frames_parameters(AVCodecContext *avctx,
1229 AVBufferRef *device_ref,
1230 enum AVPixelFormat hw_pix_fmt,
1231 AVBufferRef **out_frames_ref)
1233 AVBufferRef *frames_ref = NULL;
1234 const AVCodecHWConfigInternal *hw_config;
1235 const AVHWAccel *hwa;
1239 hw_config = avctx->codec->hw_configs[i];
1241 return AVERROR(ENOENT);
1242 if (hw_config->public.pix_fmt == hw_pix_fmt)
1246 hwa = hw_config->hwaccel;
1247 if (!hwa || !hwa->frame_params)
1248 return AVERROR(ENOENT);
1250 frames_ref = av_hwframe_ctx_alloc(device_ref);
1252 return AVERROR(ENOMEM);
1254 ret = hwa->frame_params(avctx, frames_ref);
1256 AVHWFramesContext *frames_ctx = (AVHWFramesContext*)frames_ref->data;
1258 if (frames_ctx->initial_pool_size) {
1259 // If the user has requested that extra output surfaces be
1260 // available then add them here.
1261 if (avctx->extra_hw_frames > 0)
1262 frames_ctx->initial_pool_size += avctx->extra_hw_frames;
1264 // If frame threading is enabled then an extra surface per thread
1265 // is also required.
1266 if (avctx->active_thread_type & FF_THREAD_FRAME)
1267 frames_ctx->initial_pool_size += avctx->thread_count;
1270 *out_frames_ref = frames_ref;
1272 av_buffer_unref(&frames_ref);
1277 static int hwaccel_init(AVCodecContext *avctx,
1278 const AVCodecHWConfigInternal *hw_config)
1280 const AVHWAccel *hwaccel;
1283 hwaccel = hw_config->hwaccel;
1284 if (hwaccel->capabilities & AV_HWACCEL_CODEC_CAP_EXPERIMENTAL &&
1285 avctx->strict_std_compliance > FF_COMPLIANCE_EXPERIMENTAL) {
1286 av_log(avctx, AV_LOG_WARNING, "Ignoring experimental hwaccel: %s\n",
1288 return AVERROR_PATCHWELCOME;
1291 if (hwaccel->priv_data_size) {
1292 avctx->internal->hwaccel_priv_data =
1293 av_mallocz(hwaccel->priv_data_size);
1294 if (!avctx->internal->hwaccel_priv_data)
1295 return AVERROR(ENOMEM);
1298 avctx->hwaccel = hwaccel;
1299 if (hwaccel->init) {
1300 err = hwaccel->init(avctx);
1302 av_log(avctx, AV_LOG_ERROR, "Failed setup for format %s: "
1303 "hwaccel initialisation returned error.\n",
1304 av_get_pix_fmt_name(hw_config->public.pix_fmt));
1305 av_freep(&avctx->internal->hwaccel_priv_data);
1306 avctx->hwaccel = NULL;
1314 static void hwaccel_uninit(AVCodecContext *avctx)
1316 if (avctx->hwaccel && avctx->hwaccel->uninit)
1317 avctx->hwaccel->uninit(avctx);
1319 av_freep(&avctx->internal->hwaccel_priv_data);
1321 avctx->hwaccel = NULL;
1323 av_buffer_unref(&avctx->hw_frames_ctx);
1326 int ff_get_format(AVCodecContext *avctx, const enum AVPixelFormat *fmt)
1328 const AVPixFmtDescriptor *desc;
1329 enum AVPixelFormat *choices;
1330 enum AVPixelFormat ret, user_choice;
1331 const AVCodecHWConfigInternal *hw_config;
1332 const AVCodecHWConfig *config;
1335 // Find end of list.
1336 for (n = 0; fmt[n] != AV_PIX_FMT_NONE; n++);
1337 // Must contain at least one entry.
1339 // If a software format is available, it must be the last entry.
1340 desc = av_pix_fmt_desc_get(fmt[n - 1]);
1341 if (desc->flags & AV_PIX_FMT_FLAG_HWACCEL) {
1342 // No software format is available.
1344 avctx->sw_pix_fmt = fmt[n - 1];
1347 choices = av_malloc_array(n + 1, sizeof(*choices));
1349 return AV_PIX_FMT_NONE;
1351 memcpy(choices, fmt, (n + 1) * sizeof(*choices));
1354 // Remove the previous hwaccel, if there was one.
1355 hwaccel_uninit(avctx);
1357 user_choice = avctx->get_format(avctx, choices);
1358 if (user_choice == AV_PIX_FMT_NONE) {
1359 // Explicitly chose nothing, give up.
1360 ret = AV_PIX_FMT_NONE;
1364 desc = av_pix_fmt_desc_get(user_choice);
1366 av_log(avctx, AV_LOG_ERROR, "Invalid format returned by "
1367 "get_format() callback.\n");
1368 ret = AV_PIX_FMT_NONE;
1371 av_log(avctx, AV_LOG_DEBUG, "Format %s chosen by get_format().\n",
1374 for (i = 0; i < n; i++) {
1375 if (choices[i] == user_choice)
1379 av_log(avctx, AV_LOG_ERROR, "Invalid return from get_format(): "
1380 "%s not in possible list.\n", desc->name);
1381 ret = AV_PIX_FMT_NONE;
1385 if (avctx->codec->hw_configs) {
1387 hw_config = avctx->codec->hw_configs[i];
1390 if (hw_config->public.pix_fmt == user_choice)
1398 // No config available, so no extra setup required.
1402 config = &hw_config->public;
1404 if (config->methods &
1405 AV_CODEC_HW_CONFIG_METHOD_HW_FRAMES_CTX &&
1406 avctx->hw_frames_ctx) {
1407 const AVHWFramesContext *frames_ctx =
1408 (AVHWFramesContext*)avctx->hw_frames_ctx->data;
1409 if (frames_ctx->format != user_choice) {
1410 av_log(avctx, AV_LOG_ERROR, "Invalid setup for format %s: "
1411 "does not match the format of the provided frames "
1412 "context.\n", desc->name);
1415 } else if (config->methods &
1416 AV_CODEC_HW_CONFIG_METHOD_HW_DEVICE_CTX &&
1417 avctx->hw_device_ctx) {
1418 const AVHWDeviceContext *device_ctx =
1419 (AVHWDeviceContext*)avctx->hw_device_ctx->data;
1420 if (device_ctx->type != config->device_type) {
1421 av_log(avctx, AV_LOG_ERROR, "Invalid setup for format %s: "
1422 "does not match the type of the provided device "
1423 "context.\n", desc->name);
1426 } else if (config->methods &
1427 AV_CODEC_HW_CONFIG_METHOD_INTERNAL) {
1428 // Internal-only setup, no additional configuration.
1429 } else if (config->methods &
1430 AV_CODEC_HW_CONFIG_METHOD_AD_HOC) {
1431 // Some ad-hoc configuration we can't see and can't check.
1433 av_log(avctx, AV_LOG_ERROR, "Invalid setup for format %s: "
1434 "missing configuration.\n", desc->name);
1437 if (hw_config->hwaccel) {
1438 av_log(avctx, AV_LOG_DEBUG, "Format %s requires hwaccel "
1439 "initialisation.\n", desc->name);
1440 err = hwaccel_init(avctx, hw_config);
1448 av_log(avctx, AV_LOG_DEBUG, "Format %s not usable, retrying "
1449 "get_format() without it.\n", desc->name);
1450 for (i = 0; i < n; i++) {
1451 if (choices[i] == user_choice)
1454 for (; i + 1 < n; i++)
1455 choices[i] = choices[i + 1];
1463 static int update_frame_pool(AVCodecContext *avctx, AVFrame *frame)
1465 FramePool *pool = avctx->internal->pool;
1468 switch (avctx->codec_type) {
1469 case AVMEDIA_TYPE_VIDEO: {
1472 int size[4] = { 0 };
1473 int w = frame->width;
1474 int h = frame->height;
1475 int tmpsize, unaligned;
1477 if (pool->format == frame->format &&
1478 pool->width == frame->width && pool->height == frame->height)
1481 avcodec_align_dimensions2(avctx, &w, &h, pool->stride_align);
1484 // NOTE: do not align linesizes individually, this breaks e.g. assumptions
1485 // that linesize[0] == 2*linesize[1] in the MPEG-encoder for 4:2:2
1486 ret = av_image_fill_linesizes(linesize, avctx->pix_fmt, w);
1489 // increase alignment of w for next try (rhs gives the lowest bit set in w)
1493 for (i = 0; i < 4; i++)
1494 unaligned |= linesize[i] % pool->stride_align[i];
1495 } while (unaligned);
1497 tmpsize = av_image_fill_pointers(data, avctx->pix_fmt, h,
1502 for (i = 0; i < 3 && data[i + 1]; i++)
1503 size[i] = data[i + 1] - data[i];
1504 size[i] = tmpsize - (data[i] - data[0]);
1506 for (i = 0; i < 4; i++) {
1507 av_buffer_pool_uninit(&pool->pools[i]);
1508 pool->linesize[i] = linesize[i];
1510 pool->pools[i] = av_buffer_pool_init(size[i] + 16 + STRIDE_ALIGN - 1,
1511 CONFIG_MEMORY_POISONING ?
1514 if (!pool->pools[i]) {
1515 ret = AVERROR(ENOMEM);
1520 pool->format = frame->format;
1521 pool->width = frame->width;
1522 pool->height = frame->height;
1526 case AVMEDIA_TYPE_AUDIO: {
1527 int ch = frame->channels; //av_get_channel_layout_nb_channels(frame->channel_layout);
1528 int planar = av_sample_fmt_is_planar(frame->format);
1529 int planes = planar ? ch : 1;
1531 if (pool->format == frame->format && pool->planes == planes &&
1532 pool->channels == ch && frame->nb_samples == pool->samples)
1535 av_buffer_pool_uninit(&pool->pools[0]);
1536 ret = av_samples_get_buffer_size(&pool->linesize[0], ch,
1537 frame->nb_samples, frame->format, 0);
1541 pool->pools[0] = av_buffer_pool_init(pool->linesize[0], NULL);
1542 if (!pool->pools[0]) {
1543 ret = AVERROR(ENOMEM);
1547 pool->format = frame->format;
1548 pool->planes = planes;
1549 pool->channels = ch;
1550 pool->samples = frame->nb_samples;
1553 default: av_assert0(0);
1557 for (i = 0; i < 4; i++)
1558 av_buffer_pool_uninit(&pool->pools[i]);
1560 pool->planes = pool->channels = pool->samples = 0;
1561 pool->width = pool->height = 0;
1565 static int audio_get_buffer(AVCodecContext *avctx, AVFrame *frame)
1567 FramePool *pool = avctx->internal->pool;
1568 int planes = pool->planes;
1571 frame->linesize[0] = pool->linesize[0];
1573 if (planes > AV_NUM_DATA_POINTERS) {
1574 frame->extended_data = av_mallocz_array(planes, sizeof(*frame->extended_data));
1575 frame->nb_extended_buf = planes - AV_NUM_DATA_POINTERS;
1576 frame->extended_buf = av_mallocz_array(frame->nb_extended_buf,
1577 sizeof(*frame->extended_buf));
1578 if (!frame->extended_data || !frame->extended_buf) {
1579 av_freep(&frame->extended_data);
1580 av_freep(&frame->extended_buf);
1581 return AVERROR(ENOMEM);
1584 frame->extended_data = frame->data;
1585 av_assert0(frame->nb_extended_buf == 0);
1588 for (i = 0; i < FFMIN(planes, AV_NUM_DATA_POINTERS); i++) {
1589 frame->buf[i] = av_buffer_pool_get(pool->pools[0]);
1592 frame->extended_data[i] = frame->data[i] = frame->buf[i]->data;
1594 for (i = 0; i < frame->nb_extended_buf; i++) {
1595 frame->extended_buf[i] = av_buffer_pool_get(pool->pools[0]);
1596 if (!frame->extended_buf[i])
1598 frame->extended_data[i + AV_NUM_DATA_POINTERS] = frame->extended_buf[i]->data;
1601 if (avctx->debug & FF_DEBUG_BUFFERS)
1602 av_log(avctx, AV_LOG_DEBUG, "default_get_buffer called on frame %p", frame);
1606 av_frame_unref(frame);
1607 return AVERROR(ENOMEM);
1610 static int video_get_buffer(AVCodecContext *s, AVFrame *pic)
1612 FramePool *pool = s->internal->pool;
1613 const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(pic->format);
1616 if (pic->data[0] || pic->data[1] || pic->data[2] || pic->data[3]) {
1617 av_log(s, AV_LOG_ERROR, "pic->data[*]!=NULL in avcodec_default_get_buffer\n");
1622 av_log(s, AV_LOG_ERROR,
1623 "Unable to get pixel format descriptor for format %s\n",
1624 av_get_pix_fmt_name(pic->format));
1625 return AVERROR(EINVAL);
1628 memset(pic->data, 0, sizeof(pic->data));
1629 pic->extended_data = pic->data;
1631 for (i = 0; i < 4 && pool->pools[i]; i++) {
1632 pic->linesize[i] = pool->linesize[i];
1634 pic->buf[i] = av_buffer_pool_get(pool->pools[i]);
1638 pic->data[i] = pic->buf[i]->data;
1640 for (; i < AV_NUM_DATA_POINTERS; i++) {
1641 pic->data[i] = NULL;
1642 pic->linesize[i] = 0;
1644 if (desc->flags & AV_PIX_FMT_FLAG_PAL ||
1645 ((desc->flags & FF_PSEUDOPAL) && pic->data[1]))
1646 avpriv_set_systematic_pal2((uint32_t *)pic->data[1], pic->format);
1648 if (s->debug & FF_DEBUG_BUFFERS)
1649 av_log(s, AV_LOG_DEBUG, "default_get_buffer called on pic %p\n", pic);
1653 av_frame_unref(pic);
1654 return AVERROR(ENOMEM);
1657 int avcodec_default_get_buffer2(AVCodecContext *avctx, AVFrame *frame, int flags)
1661 if (avctx->hw_frames_ctx) {
1662 ret = av_hwframe_get_buffer(avctx->hw_frames_ctx, frame, 0);
1663 frame->width = avctx->coded_width;
1664 frame->height = avctx->coded_height;
1668 if ((ret = update_frame_pool(avctx, frame)) < 0)
1671 switch (avctx->codec_type) {
1672 case AVMEDIA_TYPE_VIDEO:
1673 return video_get_buffer(avctx, frame);
1674 case AVMEDIA_TYPE_AUDIO:
1675 return audio_get_buffer(avctx, frame);
1681 static int add_metadata_from_side_data(const AVPacket *avpkt, AVFrame *frame)
1684 const uint8_t *side_metadata;
1686 AVDictionary **frame_md = &frame->metadata;
1688 side_metadata = av_packet_get_side_data(avpkt,
1689 AV_PKT_DATA_STRINGS_METADATA, &size);
1690 return av_packet_unpack_dictionary(side_metadata, size, frame_md);
1693 int ff_decode_frame_props(AVCodecContext *avctx, AVFrame *frame)
1695 const AVPacket *pkt = avctx->internal->last_pkt_props;
1697 static const struct {
1698 enum AVPacketSideDataType packet;
1699 enum AVFrameSideDataType frame;
1701 { AV_PKT_DATA_REPLAYGAIN , AV_FRAME_DATA_REPLAYGAIN },
1702 { AV_PKT_DATA_DISPLAYMATRIX, AV_FRAME_DATA_DISPLAYMATRIX },
1703 { AV_PKT_DATA_SPHERICAL, AV_FRAME_DATA_SPHERICAL },
1704 { AV_PKT_DATA_STEREO3D, AV_FRAME_DATA_STEREO3D },
1705 { AV_PKT_DATA_AUDIO_SERVICE_TYPE, AV_FRAME_DATA_AUDIO_SERVICE_TYPE },
1706 { AV_PKT_DATA_MASTERING_DISPLAY_METADATA, AV_FRAME_DATA_MASTERING_DISPLAY_METADATA },
1707 { AV_PKT_DATA_CONTENT_LIGHT_LEVEL, AV_FRAME_DATA_CONTENT_LIGHT_LEVEL },
1708 { AV_PKT_DATA_A53_CC, AV_FRAME_DATA_A53_CC },
1712 frame->pts = pkt->pts;
1714 FF_DISABLE_DEPRECATION_WARNINGS
1715 frame->pkt_pts = pkt->pts;
1716 FF_ENABLE_DEPRECATION_WARNINGS
1718 frame->pkt_pos = pkt->pos;
1719 frame->pkt_duration = pkt->duration;
1720 frame->pkt_size = pkt->size;
1722 for (i = 0; i < FF_ARRAY_ELEMS(sd); i++) {
1724 uint8_t *packet_sd = av_packet_get_side_data(pkt, sd[i].packet, &size);
1726 AVFrameSideData *frame_sd = av_frame_new_side_data(frame,
1730 return AVERROR(ENOMEM);
1732 memcpy(frame_sd->data, packet_sd, size);
1735 add_metadata_from_side_data(pkt, frame);
1737 if (pkt->flags & AV_PKT_FLAG_DISCARD) {
1738 frame->flags |= AV_FRAME_FLAG_DISCARD;
1740 frame->flags = (frame->flags & ~AV_FRAME_FLAG_DISCARD);
1743 frame->reordered_opaque = avctx->reordered_opaque;
1745 if (frame->color_primaries == AVCOL_PRI_UNSPECIFIED)
1746 frame->color_primaries = avctx->color_primaries;
1747 if (frame->color_trc == AVCOL_TRC_UNSPECIFIED)
1748 frame->color_trc = avctx->color_trc;
1749 if (frame->colorspace == AVCOL_SPC_UNSPECIFIED)
1750 frame->colorspace = avctx->colorspace;
1751 if (frame->color_range == AVCOL_RANGE_UNSPECIFIED)
1752 frame->color_range = avctx->color_range;
1753 if (frame->chroma_location == AVCHROMA_LOC_UNSPECIFIED)
1754 frame->chroma_location = avctx->chroma_sample_location;
1756 switch (avctx->codec->type) {
1757 case AVMEDIA_TYPE_VIDEO:
1758 frame->format = avctx->pix_fmt;
1759 if (!frame->sample_aspect_ratio.num)
1760 frame->sample_aspect_ratio = avctx->sample_aspect_ratio;
1762 if (frame->width && frame->height &&
1763 av_image_check_sar(frame->width, frame->height,
1764 frame->sample_aspect_ratio) < 0) {
1765 av_log(avctx, AV_LOG_WARNING, "ignoring invalid SAR: %u/%u\n",
1766 frame->sample_aspect_ratio.num,
1767 frame->sample_aspect_ratio.den);
1768 frame->sample_aspect_ratio = (AVRational){ 0, 1 };
1772 case AVMEDIA_TYPE_AUDIO:
1773 if (!frame->sample_rate)
1774 frame->sample_rate = avctx->sample_rate;
1775 if (frame->format < 0)
1776 frame->format = avctx->sample_fmt;
1777 if (!frame->channel_layout) {
1778 if (avctx->channel_layout) {
1779 if (av_get_channel_layout_nb_channels(avctx->channel_layout) !=
1781 av_log(avctx, AV_LOG_ERROR, "Inconsistent channel "
1782 "configuration.\n");
1783 return AVERROR(EINVAL);
1786 frame->channel_layout = avctx->channel_layout;
1788 if (avctx->channels > FF_SANE_NB_CHANNELS) {
1789 av_log(avctx, AV_LOG_ERROR, "Too many channels: %d.\n",
1791 return AVERROR(ENOSYS);
1795 frame->channels = avctx->channels;
1801 static void validate_avframe_allocation(AVCodecContext *avctx, AVFrame *frame)
1803 if (avctx->codec_type == AVMEDIA_TYPE_VIDEO) {
1805 int num_planes = av_pix_fmt_count_planes(frame->format);
1806 const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(frame->format);
1807 int flags = desc ? desc->flags : 0;
1808 if (num_planes == 1 && (flags & AV_PIX_FMT_FLAG_PAL))
1810 if ((flags & FF_PSEUDOPAL) && frame->data[1])
1812 for (i = 0; i < num_planes; i++) {
1813 av_assert0(frame->data[i]);
1815 // For formats without data like hwaccel allow unused pointers to be non-NULL.
1816 for (i = num_planes; num_planes > 0 && i < FF_ARRAY_ELEMS(frame->data); i++) {
1818 av_log(avctx, AV_LOG_ERROR, "Buffer returned by get_buffer2() did not zero unused plane pointers\n");
1819 frame->data[i] = NULL;
1824 static void decode_data_free(void *opaque, uint8_t *data)
1826 FrameDecodeData *fdd = (FrameDecodeData*)data;
1828 if (fdd->post_process_opaque_free)
1829 fdd->post_process_opaque_free(fdd->post_process_opaque);
1831 if (fdd->hwaccel_priv_free)
1832 fdd->hwaccel_priv_free(fdd->hwaccel_priv);
1837 int ff_attach_decode_data(AVFrame *frame)
1839 AVBufferRef *fdd_buf;
1840 FrameDecodeData *fdd;
1842 av_assert1(!frame->private_ref);
1843 av_buffer_unref(&frame->private_ref);
1845 fdd = av_mallocz(sizeof(*fdd));
1847 return AVERROR(ENOMEM);
1849 fdd_buf = av_buffer_create((uint8_t*)fdd, sizeof(*fdd), decode_data_free,
1850 NULL, AV_BUFFER_FLAG_READONLY);
1853 return AVERROR(ENOMEM);
1856 frame->private_ref = fdd_buf;
1861 static int get_buffer_internal(AVCodecContext *avctx, AVFrame *frame, int flags)
1863 const AVHWAccel *hwaccel = avctx->hwaccel;
1864 int override_dimensions = 1;
1867 if (avctx->codec_type == AVMEDIA_TYPE_VIDEO) {
1868 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) {
1869 av_log(avctx, AV_LOG_ERROR, "video_get_buffer: image parameters invalid\n");
1870 return AVERROR(EINVAL);
1873 if (frame->width <= 0 || frame->height <= 0) {
1874 frame->width = FFMAX(avctx->width, AV_CEIL_RSHIFT(avctx->coded_width, avctx->lowres));
1875 frame->height = FFMAX(avctx->height, AV_CEIL_RSHIFT(avctx->coded_height, avctx->lowres));
1876 override_dimensions = 0;
1879 if (frame->data[0] || frame->data[1] || frame->data[2] || frame->data[3]) {
1880 av_log(avctx, AV_LOG_ERROR, "pic->data[*]!=NULL in get_buffer_internal\n");
1881 return AVERROR(EINVAL);
1884 ret = ff_decode_frame_props(avctx, frame);
1889 if (hwaccel->alloc_frame) {
1890 ret = hwaccel->alloc_frame(avctx, frame);
1894 avctx->sw_pix_fmt = avctx->pix_fmt;
1896 ret = avctx->get_buffer2(avctx, frame, flags);
1900 validate_avframe_allocation(avctx, frame);
1902 ret = ff_attach_decode_data(frame);
1907 if (avctx->codec_type == AVMEDIA_TYPE_VIDEO && !override_dimensions &&
1908 !(avctx->codec->caps_internal & FF_CODEC_CAP_EXPORTS_CROPPING)) {
1909 frame->width = avctx->width;
1910 frame->height = avctx->height;
1914 av_frame_unref(frame);
1919 int ff_get_buffer(AVCodecContext *avctx, AVFrame *frame, int flags)
1921 int ret = get_buffer_internal(avctx, frame, flags);
1923 av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n");
1924 frame->width = frame->height = 0;
1929 static int reget_buffer_internal(AVCodecContext *avctx, AVFrame *frame)
1934 av_assert0(avctx->codec_type == AVMEDIA_TYPE_VIDEO);
1936 if (frame->data[0] && (frame->width != avctx->width || frame->height != avctx->height || frame->format != avctx->pix_fmt)) {
1937 av_log(avctx, AV_LOG_WARNING, "Picture changed from size:%dx%d fmt:%s to size:%dx%d fmt:%s in reget buffer()\n",
1938 frame->width, frame->height, av_get_pix_fmt_name(frame->format), avctx->width, avctx->height, av_get_pix_fmt_name(avctx->pix_fmt));
1939 av_frame_unref(frame);
1942 if (!frame->data[0])
1943 return ff_get_buffer(avctx, frame, AV_GET_BUFFER_FLAG_REF);
1945 if (av_frame_is_writable(frame))
1946 return ff_decode_frame_props(avctx, frame);
1948 tmp = av_frame_alloc();
1950 return AVERROR(ENOMEM);
1952 av_frame_move_ref(tmp, frame);
1954 ret = ff_get_buffer(avctx, frame, AV_GET_BUFFER_FLAG_REF);
1956 av_frame_free(&tmp);
1960 av_frame_copy(frame, tmp);
1961 av_frame_free(&tmp);
1966 int ff_reget_buffer(AVCodecContext *avctx, AVFrame *frame)
1968 int ret = reget_buffer_internal(avctx, frame);
1970 av_log(avctx, AV_LOG_ERROR, "reget_buffer() failed\n");
1974 static void bsfs_flush(AVCodecContext *avctx)
1976 DecodeFilterContext *s = &avctx->internal->filter;
1978 for (int i = 0; i < s->nb_bsfs; i++)
1979 av_bsf_flush(s->bsfs[i]);
1982 void avcodec_flush_buffers(AVCodecContext *avctx)
1984 avctx->internal->draining = 0;
1985 avctx->internal->draining_done = 0;
1986 avctx->internal->nb_draining_errors = 0;
1987 av_frame_unref(avctx->internal->buffer_frame);
1988 av_frame_unref(avctx->internal->compat_decode_frame);
1989 av_packet_unref(avctx->internal->buffer_pkt);
1990 avctx->internal->buffer_pkt_valid = 0;
1992 av_packet_unref(avctx->internal->ds.in_pkt);
1994 if (HAVE_THREADS && avctx->active_thread_type & FF_THREAD_FRAME)
1995 ff_thread_flush(avctx);
1996 else if (avctx->codec->flush)
1997 avctx->codec->flush(avctx);
1999 avctx->pts_correction_last_pts =
2000 avctx->pts_correction_last_dts = INT64_MIN;
2004 if (!avctx->refcounted_frames)
2005 av_frame_unref(avctx->internal->to_free);
2008 void ff_decode_bsfs_uninit(AVCodecContext *avctx)
2010 DecodeFilterContext *s = &avctx->internal->filter;
2013 for (i = 0; i < s->nb_bsfs; i++)
2014 av_bsf_free(&s->bsfs[i]);