From 5d4234b3ea376c59a53a9ab6fb69aae8c5ee8fac Mon Sep 17 00:00:00 2001 From: Andreas Rheinhardt Date: Mon, 29 Mar 2021 18:54:46 +0200 Subject: [PATCH] avcodec/ac3enc: Avoid needlessly copying encoded packets around AC-3 and EAC-3 are codecs whose packet sizes are known in advance, so one can use the min_size parameter of ff_alloc_packet2() to allocate exactly this amount. This avoids a memcpy later in av_packet_make_refcounted() in encode_simple_internal(). Signed-off-by: Andreas Rheinhardt --- libavcodec/ac3enc.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/libavcodec/ac3enc.c b/libavcodec/ac3enc.c index 4cfd0afe12..fc4d45651d 100644 --- a/libavcodec/ac3enc.c +++ b/libavcodec/ac3enc.c @@ -1759,7 +1759,8 @@ int ff_ac3_encode_frame_common_end(AVCodecContext *avctx, AVPacket *avpkt, ac3_quantize_mantissas(s); - if ((ret = ff_alloc_packet2(avctx, avpkt, s->frame_size, 0)) < 0) + ret = ff_alloc_packet2(avctx, avpkt, s->frame_size, s->frame_size); + if (ret < 0) return ret; ac3_output_frame(s, avpkt->data);