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avcodec/yuv4enc: 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 a043dcbe65
commit a3f02388f1
1 changed files with 5 additions and 1 deletions
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6
libavcodec/yuv4enc.c
View File

@ -21,6 +21,7 @@
*/
#include "avcodec.h"
#include "encode.h"
#include "internal.h"
static int yuv4_encode_frame(AVCodecContext *avctx, AVPacket *pkt,
@ -30,7 +31,9 @@ static int yuv4_encode_frame(AVCodecContext *avctx, AVPacket *pkt,
uint8_t *y, *u, *v;
int i, j, ret;
if ((ret = ff_alloc_packet2(avctx, pkt, 6 * (avctx->width + 1 >> 1) * (avctx->height + 1 >> 1), 0)) < 0)
ret = ff_get_encode_buffer(avctx, pkt, 6 * (avctx->width + 1 >> 1)
* (avctx->height + 1 >> 1), 0);
if (ret < 0)
return ret;
dst = pkt->data;
@ -62,6 +65,7 @@ const AVCodec ff_yuv4_encoder = {
.long_name = NULL_IF_CONFIG_SMALL("Uncompressed packed 4:2:0"),
.type = AVMEDIA_TYPE_VIDEO,
.id = AV_CODEC_ID_YUV4,
.capabilities = AV_CODEC_CAP_DR1,
.encode2 = yuv4_encode_frame,
.pix_fmts = (const enum AVPixelFormat[]){ AV_PIX_FMT_YUV420P, AV_PIX_FMT_NONE },
};