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avcodec/sbcenc: 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.

Reviewed-by: James Almer <jamrial@gmail.com>
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 250d8661ab
commit 7a3613696d
1 changed files with 3 additions and 2 deletions
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5
libavcodec/sbcenc.c
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@ -32,6 +32,7 @@
#include "libavutil/opt.h"
#include "avcodec.h"
#include "encode.h"
#include "internal.h"
#include "profiles.h"
#include "put_bits.h"
@ -290,7 +291,7 @@ static int sbc_encode_frame(AVCodecContext *avctx, AVPacket *avpkt,
if (av_frame->nb_samples * frame->channels * 2 < frame->codesize)
return 0;
if ((ret = ff_alloc_packet2(avctx, avpkt, frame_length, 0)) < 0)
if ((ret = ff_get_encode_buffer(avctx, avpkt, frame_length, 0)) < 0)
return ret;
/* Select the needed input data processing function and call it */
@ -346,10 +347,10 @@ const AVCodec ff_sbc_encoder = {
.long_name = NULL_IF_CONFIG_SMALL("SBC (low-complexity subband codec)"),
.type = AVMEDIA_TYPE_AUDIO,
.id = AV_CODEC_ID_SBC,
.capabilities = AV_CODEC_CAP_DR1 | AV_CODEC_CAP_SMALL_LAST_FRAME,
.priv_data_size = sizeof(SBCEncContext),
.init = sbc_encode_init,
.encode2 = sbc_encode_frame,
.capabilities = AV_CODEC_CAP_SMALL_LAST_FRAME,
.caps_internal = FF_CODEC_CAP_INIT_THREADSAFE,
.channel_layouts = (const uint64_t[]) { AV_CH_LAYOUT_MONO,
AV_CH_LAYOUT_STEREO, 0},