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6fb2fd895e
This commit introduces a new AVPacket side data type: AV_PKT_DATA_STRINGS_METADATA. Its main goal is to provide a way to transmit the metadata from the AVFilterBufferRef up to the AVFrame. This is at the moment "only" useful for lavfi input from libavdevice: lavd/lavfi only outputs packets, and the metadata from the buffer ref kept in its context needs to be transmitted from the packet to the frame by the decoders. The buffer ref can be destroyed at any time (along with the metadata), and a duplication of the AVPacket needs to duplicate the metadata as well, so the choice of using the side data to store them was selected. Making sure lavd/lavfi raises the metadata is useful to allow tools like ffprobe to access the filters metadata (it is at the moment the only way); ffprobe will now automatically show the AVFrame metadata in any customizable output format for users. API users will also be able to access the AVFrame->metadata pointer the same way ffprobe does (av_frame_get_metadata). All the changes are done in this single commit to avoid some memory leaks: for instances, the changes in lavfi/avcodec.c are meant to duplicate the metadata from the buffer ref into the AVFrame. Unless we have an internal way of freeing the AVFrame->metadata automatically, it will leak in most of the user apps. To fix this problem, we introduce AVCodecContext->metadata and link avctx->metadata to the current frame->metadata and free it at each decode frame call (and in the codec closing callback for the last one). But doing this also means to update the way the tiff decoder already handles the AVFrame->metadata (it's the only one decoder with frame metadata at the moment), by making sure it is not trying to free a pointer already freed by the lavc internals. The lavfi/avcodec.c buffer ref code is based on an old Thomas Kühnel work, the rest of the code belongs to the commit author. Signed-off-by: Thomas Kühnel <kuehnelth@googlemail.com> Signed-off-by: Clément Bœsch <ubitux@gmail.com>
108 lines
3.6 KiB
C
108 lines
3.6 KiB
C
/*
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*
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* This file is part of FFmpeg.
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*
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* FFmpeg is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* FFmpeg is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with FFmpeg; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#ifndef AVCODEC_VERSION_H
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#define AVCODEC_VERSION_H
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/**
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* @file
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* @ingroup libavc
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* Libavcodec version macros.
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*/
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#include "libavutil/avutil.h"
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#define LIBAVCODEC_VERSION_MAJOR 54
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#define LIBAVCODEC_VERSION_MINOR 68
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#define LIBAVCODEC_VERSION_MICRO 100
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#define LIBAVCODEC_VERSION_INT AV_VERSION_INT(LIBAVCODEC_VERSION_MAJOR, \
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LIBAVCODEC_VERSION_MINOR, \
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LIBAVCODEC_VERSION_MICRO)
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#define LIBAVCODEC_VERSION AV_VERSION(LIBAVCODEC_VERSION_MAJOR, \
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LIBAVCODEC_VERSION_MINOR, \
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LIBAVCODEC_VERSION_MICRO)
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#define LIBAVCODEC_BUILD LIBAVCODEC_VERSION_INT
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#define LIBAVCODEC_IDENT "Lavc" AV_STRINGIFY(LIBAVCODEC_VERSION)
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/**
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* FF_API_* defines may be placed below to indicate public API that will be
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* dropped at a future version bump. The defines themselves are not part of
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* the public API and may change, break or disappear at any time.
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*/
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#ifndef FF_API_REQUEST_CHANNELS
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#define FF_API_REQUEST_CHANNELS (LIBAVCODEC_VERSION_MAJOR < 55)
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#endif
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#ifndef FF_API_ALLOC_CONTEXT
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#define FF_API_ALLOC_CONTEXT (LIBAVCODEC_VERSION_MAJOR < 55)
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#endif
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#ifndef FF_API_AVCODEC_OPEN
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#define FF_API_AVCODEC_OPEN (LIBAVCODEC_VERSION_MAJOR < 55)
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#endif
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#ifndef FF_API_OLD_DECODE_AUDIO
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#define FF_API_OLD_DECODE_AUDIO (LIBAVCODEC_VERSION_MAJOR < 55)
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#endif
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#ifndef FF_API_OLD_TIMECODE
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#define FF_API_OLD_TIMECODE (LIBAVCODEC_VERSION_MAJOR < 55)
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#endif
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#ifndef FF_API_OLD_ENCODE_AUDIO
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#define FF_API_OLD_ENCODE_AUDIO (LIBAVCODEC_VERSION_MAJOR < 55)
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#endif
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#ifndef FF_API_OLD_ENCODE_VIDEO
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#define FF_API_OLD_ENCODE_VIDEO (LIBAVCODEC_VERSION_MAJOR < 55)
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#endif
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#ifndef FF_API_MPV_GLOBAL_OPTS
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#define FF_API_MPV_GLOBAL_OPTS (LIBAVCODEC_VERSION_MAJOR < 55)
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#endif
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#ifndef FF_API_COLOR_TABLE_ID
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#define FF_API_COLOR_TABLE_ID (LIBAVCODEC_VERSION_MAJOR < 55)
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#endif
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#ifndef FF_API_INTER_THRESHOLD
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#define FF_API_INTER_THRESHOLD (LIBAVCODEC_VERSION_MAJOR < 55)
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#endif
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#ifndef FF_API_SUB_ID
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#define FF_API_SUB_ID (LIBAVCODEC_VERSION_MAJOR < 55)
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#endif
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#ifndef FF_API_DSP_MASK
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#define FF_API_DSP_MASK (LIBAVCODEC_VERSION_MAJOR < 55)
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#endif
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#ifndef FF_API_FIND_BEST_PIX_FMT
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#define FF_API_FIND_BEST_PIX_FMT (LIBAVCODEC_VERSION_MAJOR < 55)
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#endif
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#ifndef FF_API_CODEC_ID
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#define FF_API_CODEC_ID (LIBAVCODEC_VERSION_MAJOR < 55)
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#endif
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#ifndef FF_API_VDA_ASYNC
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#define FF_API_VDA_ASYNC (LIBAVCODEC_VERSION_MAJOR < 55)
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#endif
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#ifndef FF_API_AVCODEC_RESAMPLE
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#define FF_API_AVCODEC_RESAMPLE (LIBAVCODEC_VERSION_MAJOR < 55)
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#endif
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#ifndef FF_API_LIBMPEG2
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#define FF_API_LIBMPEG2 (LIBAVCODEC_VERSION_MAJOR < 55)
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#endif
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#ifndef FF_API_MMI
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#define FF_API_MMI (LIBAVCODEC_VERSION_MAJOR < 55)
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#endif
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#endif /* AVCODEC_VERSION_H */
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