mirror of
https://git.ffmpeg.org/ffmpeg.git
synced 2024-12-11 09:35:22 +00:00
c8dea81921
Intended for use with hardware frames for which rawvideo is not sufficient. Requires the trusted packet flag to be set - decoding fails if not to avoid security issues (the wrapped AVFrame can contain pointers to arbitrary data).
122 lines
3.4 KiB
C
122 lines
3.4 KiB
C
/*
|
|
* AVFrame wrapper
|
|
* Copyright (c) 2015 Luca Barbato
|
|
*
|
|
* This file is part of FFmpeg.
|
|
*
|
|
* FFmpeg is free software; you can redistribute it and/or
|
|
* modify it under the terms of the GNU Lesser General Public
|
|
* License as published by the Free Software Foundation; either
|
|
* version 2.1 of the License, or (at your option) any later version.
|
|
*
|
|
* FFmpeg is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
|
* Lesser General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU Lesser General Public
|
|
* License along with FFmpeg; if not, write to the Free Software
|
|
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
|
|
*/
|
|
|
|
/**
|
|
* @file
|
|
* Simple wrapper to store an AVFrame and forward it as AVPacket.
|
|
*/
|
|
|
|
#include "avcodec.h"
|
|
#include "internal.h"
|
|
|
|
#include "libavutil/internal.h"
|
|
#include "libavutil/frame.h"
|
|
#include "libavutil/buffer.h"
|
|
#include "libavutil/pixdesc.h"
|
|
|
|
static void wrapped_avframe_release_buffer(void *unused, uint8_t *data)
|
|
{
|
|
AVFrame *frame = (AVFrame *)data;
|
|
|
|
av_frame_free(&frame);
|
|
}
|
|
|
|
static int wrapped_avframe_encode(AVCodecContext *avctx, AVPacket *pkt,
|
|
const AVFrame *frame, int *got_packet)
|
|
{
|
|
AVFrame *wrapped = av_frame_clone(frame);
|
|
uint8_t *data;
|
|
int size = sizeof(*wrapped) + AV_INPUT_BUFFER_PADDING_SIZE;
|
|
|
|
if (!wrapped)
|
|
return AVERROR(ENOMEM);
|
|
|
|
data = av_mallocz(size);
|
|
if (!data) {
|
|
av_frame_free(&wrapped);
|
|
return AVERROR(ENOMEM);
|
|
}
|
|
|
|
pkt->buf = av_buffer_create(data, size,
|
|
wrapped_avframe_release_buffer, NULL,
|
|
AV_BUFFER_FLAG_READONLY);
|
|
if (!pkt->buf) {
|
|
av_frame_free(&wrapped);
|
|
av_freep(&data);
|
|
return AVERROR(ENOMEM);
|
|
}
|
|
|
|
av_frame_move_ref((AVFrame*)data, wrapped);
|
|
av_frame_free(&wrapped);
|
|
|
|
pkt->data = data;
|
|
pkt->size = sizeof(*wrapped);
|
|
|
|
pkt->flags |= AV_PKT_FLAG_KEY;
|
|
*got_packet = 1;
|
|
return 0;
|
|
}
|
|
|
|
static int wrapped_avframe_decode(AVCodecContext *avctx, void *data,
|
|
int *got_frame, AVPacket *pkt)
|
|
{
|
|
AVFrame *in, *out;
|
|
int err;
|
|
|
|
if (!(pkt->flags & AV_PKT_FLAG_TRUSTED)) {
|
|
// This decoder is not usable with untrusted input.
|
|
return AVERROR(EPERM);
|
|
}
|
|
|
|
if (pkt->size < sizeof(AVFrame))
|
|
return AVERROR(EINVAL);
|
|
|
|
in = (AVFrame*)pkt->data;
|
|
out = data;
|
|
|
|
err = ff_decode_frame_props(avctx, out);
|
|
if (err < 0)
|
|
return err;
|
|
|
|
av_frame_move_ref(out, in);
|
|
|
|
*got_frame = 1;
|
|
return 0;
|
|
}
|
|
|
|
AVCodec ff_wrapped_avframe_encoder = {
|
|
.name = "wrapped_avframe",
|
|
.long_name = NULL_IF_CONFIG_SMALL("AVFrame to AVPacket passthrough"),
|
|
.type = AVMEDIA_TYPE_VIDEO,
|
|
.id = AV_CODEC_ID_WRAPPED_AVFRAME,
|
|
.encode2 = wrapped_avframe_encode,
|
|
.caps_internal = FF_CODEC_CAP_INIT_THREADSAFE,
|
|
};
|
|
|
|
AVCodec ff_wrapped_avframe_decoder = {
|
|
.name = "wrapped_avframe",
|
|
.long_name = NULL_IF_CONFIG_SMALL("AVPacket to AVFrame passthrough"),
|
|
.type = AVMEDIA_TYPE_VIDEO,
|
|
.id = AV_CODEC_ID_WRAPPED_AVFRAME,
|
|
.decode = wrapped_avframe_decode,
|
|
.caps_internal = FF_CODEC_CAP_INIT_THREADSAFE,
|
|
};
|