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avcodec/adxenc: 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 39bb36d723
commit ad232c6833
1 changed files with 4 additions and 3 deletions
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7
libavcodec/adxenc.c
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@ -22,6 +22,7 @@
#include "avcodec.h"
#include "adx.h"
#include "bytestream.h"
#include "encode.h"
#include "internal.h"
#include "put_bits.h"
@ -148,7 +149,7 @@ static int adx_encode_frame(AVCodecContext *avctx, AVPacket *avpkt,
if (!samples) {
if (c->eof)
return 0;
if ((ret = ff_alloc_packet2(avctx, avpkt, 18, 0)) < 0)
if ((ret = ff_get_encode_buffer(avctx, avpkt, 18, 0)) < 0)
return ret;
c->eof = 1;
dst = avpkt->data;
@ -162,7 +163,7 @@ static int adx_encode_frame(AVCodecContext *avctx, AVPacket *avpkt,
}
out_size = BLOCK_SIZE * avctx->channels + !c->header_parsed * HEADER_SIZE;
if ((ret = ff_alloc_packet2(avctx, avpkt, out_size, 0)) < 0)
if ((ret = ff_get_encode_buffer(avctx, avpkt, out_size, 0)) < 0)
return ret;
dst = avpkt->data;
@ -192,10 +193,10 @@ const AVCodec ff_adpcm_adx_encoder = {
.long_name = NULL_IF_CONFIG_SMALL("SEGA CRI ADX ADPCM"),
.type = AVMEDIA_TYPE_AUDIO,
.id = AV_CODEC_ID_ADPCM_ADX,
.capabilities = AV_CODEC_CAP_DR1 | AV_CODEC_CAP_DELAY,
.priv_data_size = sizeof(ADXContext),
.init = adx_encode_init,
.encode2 = adx_encode_frame,
.capabilities = AV_CODEC_CAP_DELAY,
.sample_fmts = (const enum AVSampleFormat[]) { AV_SAMPLE_FMT_S16,
AV_SAMPLE_FMT_NONE },
.caps_internal = FF_CODEC_CAP_INIT_THREADSAFE,