[FFmpeg-cvslog] avcodec/v308enc: Avoid copying packet data, allow user-supplied buffers

[Andreas Rheinhardt]

ffmpeg | branch: master | Andreas Rheinhardt <andreas.rheinhardt at outlook.com> | Sun Apr 25 01:43:26 2021 +0200| [27b0a5204d7d1a56abba1bf981123cc29a9f17bc] | committer: Andreas Rheinhardt

avcodec/v308enc: 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 at outlook.com>

> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=27b0a5204d7d1a56abba1bf981123cc29a9f17bc
---

 libavcodec/v308enc.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/libavcodec/v308enc.c b/libavcodec/v308enc.c
index f3fb617a7b..6b58bb102c 100644
--- a/libavcodec/v308enc.c
+++ b/libavcodec/v308enc.c
@@ -22,6 +22,7 @@
 
 #include "libavutil/intreadwrite.h"
 #include "avcodec.h"
+#include "encode.h"
 #include "internal.h"
 
 static av_cold int v308_encode_init(AVCodecContext *avctx)
@@ -44,7 +45,8 @@ static int v308_encode_frame(AVCodecContext *avctx, AVPacket *pkt,
     uint8_t *y, *u, *v;
     int i, j, ret;
 
-    if ((ret = ff_alloc_packet2(avctx, pkt, avctx->width * avctx->height * 3, 0)) < 0)
+    ret = ff_get_encode_buffer(avctx, pkt, avctx->width * avctx->height * 3, 0);
+    if (ret < 0)
         return ret;
     dst = pkt->data;
 
@@ -73,6 +75,7 @@ const AVCodec ff_v308_encoder = {
     .long_name    = NULL_IF_CONFIG_SMALL("Uncompressed packed 4:4:4"),
     .type         = AVMEDIA_TYPE_VIDEO,
     .id           = AV_CODEC_ID_V308,
+    .capabilities = AV_CODEC_CAP_DR1,
     .init         = v308_encode_init,
     .encode2      = v308_encode_frame,
     .pix_fmts     = (const enum AVPixelFormat[]){ AV_PIX_FMT_YUV444P, AV_PIX_FMT_NONE },