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Code Issues Releases Activity

avcodec/g723_1enc: Avoid copying packet data, allow user-supplied buffers

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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 63218fc2d0
commit f471caaf90
1 changed files with 7 additions and 6 deletions
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13
libavcodec/g723_1enc.c
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@ -34,6 +34,7 @@
#include "avcodec.h"
#include "celp_math.h"
#include "encode.h"
#include "g723_1.h"
#include "internal.h"
@ -1044,10 +1045,9 @@ static void fcb_search(G723_1_ChannelContext *p, int16_t *impulse_resp,
* @param frame output buffer
* @param size size of the buffer
*/
static int pack_bitstream(G723_1_ChannelContext *p, AVPacket *avpkt)
static void pack_bitstream(G723_1_ChannelContext *p, AVPacket *avpkt, int info_bits)
{
PutBitContext pb;
int info_bits = 0;
int i, temp;
init_put_bits(&pb, avpkt->data, avpkt->size);
@ -1099,7 +1099,6 @@ static int pack_bitstream(G723_1_ChannelContext *p, AVPacket *avpkt)
}
flush_put_bits(&pb);
return frame_size[info_bits];
}
static int g723_1_encode_frame(AVCodecContext *avctx, AVPacket *avpkt,
@ -1112,7 +1111,7 @@ static int g723_1_encode_frame(AVCodecContext *avctx, AVPacket *avpkt,
int16_t cur_lsp[LPC_ORDER];
int16_t weighted_lpc[LPC_ORDER * SUBFRAMES << 1];
int16_t vector[FRAME_LEN + PITCH_MAX];
int offset, ret, i, j;
int offset, ret, i, j, info_bits = 0;
int16_t *in, *start;
HFParam hf[4];
@ -1231,11 +1230,12 @@ static int g723_1_encode_frame(AVCodecContext *avctx, AVPacket *avpkt,
av_free(start);
if ((ret = ff_alloc_packet2(avctx, avpkt, 24, 0)) < 0)
ret = ff_get_encode_buffer(avctx, avpkt, frame_size[info_bits], 0);
if (ret < 0)
return ret;
*got_packet_ptr = 1;
avpkt->size = pack_bitstream(p, avpkt);
pack_bitstream(p, avpkt, info_bits);
return 0;
}
@ -1249,6 +1249,7 @@ const AVCodec ff_g723_1_encoder = {
.long_name = NULL_IF_CONFIG_SMALL("G.723.1"),
.type = AVMEDIA_TYPE_AUDIO,
.id = AV_CODEC_ID_G723_1,
.capabilities = AV_CODEC_CAP_DR1,
.priv_data_size = sizeof(G723_1_Context),
.init = g723_1_encode_init,
.encode2 = g723_1_encode_frame,