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https://github.com/FFmpeg/FFmpeg.git
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4243da4ff4
This is possible, because every given FFCodec has to implement exactly one of these. Doing so decreases sizeof(FFCodec) and therefore decreases the size of the binary. Notice that in case of position-independent code the decrease is in .data.rel.ro, so that this translates to decreased memory consumption. Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>
128 lines
3.5 KiB
C
128 lines
3.5 KiB
C
/*
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* AVFrame wrapper
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* Copyright (c) 2015 Luca Barbato
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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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/**
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* @file
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* Simple wrapper to store an AVFrame and forward it as AVPacket.
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*/
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#include "avcodec.h"
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#include "codec_internal.h"
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#include "decode.h"
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#include "libavutil/internal.h"
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#include "libavutil/frame.h"
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#include "libavutil/buffer.h"
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#include "libavutil/pixdesc.h"
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static void wrapped_avframe_release_buffer(void *unused, uint8_t *data)
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{
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AVFrame *frame = (AVFrame *)data;
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av_frame_free(&frame);
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}
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static int wrapped_avframe_encode(AVCodecContext *avctx, AVPacket *pkt,
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const AVFrame *frame, int *got_packet)
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{
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AVFrame *wrapped = av_frame_clone(frame);
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uint8_t *data;
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int size = sizeof(*wrapped) + AV_INPUT_BUFFER_PADDING_SIZE;
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if (!wrapped)
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return AVERROR(ENOMEM);
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data = av_mallocz(size);
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if (!data) {
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av_frame_free(&wrapped);
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return AVERROR(ENOMEM);
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}
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pkt->buf = av_buffer_create(data, size,
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wrapped_avframe_release_buffer, NULL,
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AV_BUFFER_FLAG_READONLY);
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if (!pkt->buf) {
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av_frame_free(&wrapped);
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av_freep(&data);
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return AVERROR(ENOMEM);
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}
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av_frame_move_ref((AVFrame*)data, wrapped);
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av_frame_free(&wrapped);
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pkt->data = data;
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pkt->size = sizeof(*wrapped);
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pkt->flags |= AV_PKT_FLAG_KEY;
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*got_packet = 1;
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return 0;
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}
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static int wrapped_avframe_decode(AVCodecContext *avctx, AVFrame *out,
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int *got_frame, AVPacket *pkt)
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{
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AVFrame *in;
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int err;
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if (!(pkt->flags & AV_PKT_FLAG_TRUSTED)) {
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// This decoder is not usable with untrusted input.
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return AVERROR(EPERM);
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}
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if (pkt->size < sizeof(AVFrame))
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return AVERROR(EINVAL);
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in = (AVFrame*)pkt->data;
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err = ff_decode_frame_props(avctx, out);
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if (err < 0)
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return err;
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av_frame_move_ref(out, in);
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err = ff_attach_decode_data(out);
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if (err < 0) {
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av_frame_unref(out);
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return err;
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}
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*got_frame = 1;
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return 0;
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}
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const FFCodec ff_wrapped_avframe_encoder = {
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.p.name = "wrapped_avframe",
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.p.long_name = NULL_IF_CONFIG_SMALL("AVFrame to AVPacket passthrough"),
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.p.type = AVMEDIA_TYPE_VIDEO,
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.p.id = AV_CODEC_ID_WRAPPED_AVFRAME,
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FF_CODEC_ENCODE_CB(wrapped_avframe_encode),
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.caps_internal = FF_CODEC_CAP_INIT_THREADSAFE,
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};
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const FFCodec ff_wrapped_avframe_decoder = {
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.p.name = "wrapped_avframe",
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.p.long_name = NULL_IF_CONFIG_SMALL("AVPacket to AVFrame passthrough"),
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.p.type = AVMEDIA_TYPE_VIDEO,
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.p.id = AV_CODEC_ID_WRAPPED_AVFRAME,
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FF_CODEC_DECODE_CB(wrapped_avframe_decode),
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.caps_internal = FF_CODEC_CAP_INIT_THREADSAFE,
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};
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