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[FFmpeg-devel,01/34] avcodec/adpcmenc: Avoid copying packet data

Message ID HE1PR0301MB2154D98403AA87DB5AA09D088F439@HE1PR0301MB2154.eurprd03.prod.outlook.com
State Superseded
Headers show
Series [FFmpeg-devel,01/34] avcodec/adpcmenc: Avoid copying packet data
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Commit Message

Andreas Rheinhardt April 25, 2021, 10:28 p.m. UTC
When the packet size is known in advance like here, one can avoid
an intermediate buffer for the packet data.

Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>
---
 libavcodec/adpcmenc.c | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

Comments

James Almer April 25, 2021, 10:35 p.m. UTC | #1
On 4/25/2021 7:28 PM, Andreas Rheinhardt wrote:
> When the packet size is known in advance like here, one can avoid
> an intermediate buffer for the packet data.

With 4.4 released and the bump about happen, we can start porting all 
(or most) encoders to get_encode_buffer(). And this one here is a no 
brainer for that.

> 
> Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>
> ---
>   libavcodec/adpcmenc.c | 3 +--
>   1 file changed, 1 insertion(+), 2 deletions(-)
> 
> diff --git a/libavcodec/adpcmenc.c b/libavcodec/adpcmenc.c
> index 9dc77d519a..131e3b3910 100644
> --- a/libavcodec/adpcmenc.c
> +++ b/libavcodec/adpcmenc.c
> @@ -598,7 +598,7 @@ static int adpcm_encode_frame(AVCodecContext *avctx, AVPacket *avpkt,
>           pkt_size = (frame->nb_samples * avctx->channels) / 2;
>       else
>           pkt_size = avctx->block_align;
> -    if ((ret = ff_alloc_packet2(avctx, avpkt, pkt_size, 0)) < 0)
> +    if ((ret = ff_alloc_packet2(avctx, avpkt, pkt_size, pkt_size)) < 0)
>           return ret;
>       dst = avpkt->data;
>   
> @@ -933,7 +933,6 @@ static int adpcm_encode_frame(AVCodecContext *avctx, AVPacket *avpkt,
>           return AVERROR(EINVAL);
>       }
>   
> -    avpkt->size = pkt_size;
>       *got_packet_ptr = 1;
>       return 0;
>   }
>
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Patch

diff --git a/libavcodec/adpcmenc.c b/libavcodec/adpcmenc.c
index 9dc77d519a..131e3b3910 100644
--- a/libavcodec/adpcmenc.c
+++ b/libavcodec/adpcmenc.c
@@ -598,7 +598,7 @@  static int adpcm_encode_frame(AVCodecContext *avctx, AVPacket *avpkt,
         pkt_size = (frame->nb_samples * avctx->channels) / 2;
     else
         pkt_size = avctx->block_align;
-    if ((ret = ff_alloc_packet2(avctx, avpkt, pkt_size, 0)) < 0)
+    if ((ret = ff_alloc_packet2(avctx, avpkt, pkt_size, pkt_size)) < 0)
         return ret;
     dst = avpkt->data;
 
@@ -933,7 +933,6 @@  static int adpcm_encode_frame(AVCodecContext *avctx, AVPacket *avpkt,
         return AVERROR(EINVAL);
     }
 
-    avpkt->size = pkt_size;
     *got_packet_ptr = 1;
     return 0;
 }