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/*
* 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 "codec_internal.h"
#include "decode.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, AVFrame *out,
int *got_frame, AVPacket *pkt)
{
AVFrame *in;
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;
err = av_frame_ref(out, in);
if (err < 0)
return err;
err = ff_decode_frame_props(avctx, out);
if (err < 0)
return err;
*got_frame = 1;
return 0;
}
const FFCodec ff_wrapped_avframe_encoder = {
.p.name = "wrapped_avframe",
CODEC_LONG_NAME("AVFrame to AVPacket passthrough"),
.p.type = AVMEDIA_TYPE_VIDEO,
.p.id = AV_CODEC_ID_WRAPPED_AVFRAME,
FF_CODEC_ENCODE_CB(wrapped_avframe_encode),
};
const FFCodec ff_wrapped_avframe_decoder = {
.p.name = "wrapped_avframe",
CODEC_LONG_NAME("AVPacket to AVFrame passthrough"),
.p.type = AVMEDIA_TYPE_VIDEO,
.p.id = AV_CODEC_ID_WRAPPED_AVFRAME,
FF_CODEC_DECODE_CB(wrapped_avframe_decode),
};
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