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avcodec/xwdenc: Avoid copying packet data, allow user-supplied buffers 

When the packet size is known in advance like here, one can avoid
an intermediate buffer for the packet data by using
ff_get_encode_buffer() and also set AV_CODEC_CAP_DR1 at the same time.

Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>
This commit is contained in:
Andreas Rheinhardt 2021-04-25 01:43:26 +02:00
parent b66ca3b8d4
commit 765366bcba
1 changed files with 3 additions and 1 deletions
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4
libavcodec/xwdenc.c
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@ -24,6 +24,7 @@
#include "libavutil/pixdesc.h"
#include "avcodec.h"
#include "bytestream.h"
#include "encode.h"
#include "internal.h"
#include "xwd.h"
@ -147,7 +148,7 @@ static int xwd_encode_frame(AVCodecContext *avctx, AVPacket *pkt,
header_size = XWD_HEADER_SIZE + WINDOW_NAME_SIZE;
out_size = header_size + ncolors * XWD_CMAP_SIZE + avctx->height * lsize;
if ((ret = ff_alloc_packet2(avctx, pkt, out_size, 0)) < 0)
if ((ret = ff_get_encode_buffer(avctx, pkt, out_size, 0)) < 0)
return ret;
buf = pkt->data;
@ -220,6 +221,7 @@ const AVCodec ff_xwd_encoder = {
.long_name = NULL_IF_CONFIG_SMALL("XWD (X Window Dump) image"),
.type = AVMEDIA_TYPE_VIDEO,
.id = AV_CODEC_ID_XWD,
.capabilities = AV_CODEC_CAP_DR1,
.encode2 = xwd_encode_frame,
.pix_fmts = (const enum AVPixelFormat[]) { AV_PIX_FMT_BGRA,
AV_PIX_FMT_RGBA,