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Code Issues Releases Activity

avcodec/pcm: Cache sample_size value

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No need to go through two switches per packet.

Reviewed-by: Ramiro Polla <ramiro.polla@gmail.com>
Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>
This commit is contained in:
Andreas Rheinhardt
2025-03-11 17:53:06 +01:00
parent 5247090b0d
commit 485e5388e9
1 changed files with 11 additions and 6 deletions
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15
libavcodec/pcm.c
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@@ -243,6 +243,7 @@ static int pcm_encode_frame(AVCodecContext *avctx, AVPacket *avpkt,
} }
typedef struct PCMDecode { typedef struct PCMDecode {
int sample_size;
short table[256]; short table[256];
void (*vector_fmul_scalar)(float *dst, const float *src, float mul, void (*vector_fmul_scalar)(float *dst, const float *src, float mul,
int len); int len);
@@ -286,8 +287,14 @@ static av_cold int pcm_decode_init(AVCodecContext *avctx)
avctx->sample_fmt = avctx->codec->sample_fmts[0]; avctx->sample_fmt = avctx->codec->sample_fmts[0];
if (avctx->codec_id != AV_CODEC_ID_PCM_LXF) {
int bits_per_sample = av_get_exact_bits_per_sample(avctx->codec_id);
if (avctx->sample_fmt == AV_SAMPLE_FMT_S32) if (avctx->sample_fmt == AV_SAMPLE_FMT_S32)
avctx->bits_per_raw_sample = av_get_bits_per_sample(avctx->codec_id); avctx->bits_per_raw_sample = bits_per_sample;
s->sample_size = bits_per_sample / 8;
} else {
s->sample_size = 5;
}
return 0; return 0;
} }
@@ -328,17 +335,15 @@ static int pcm_decode_frame(AVCodecContext *avctx, AVFrame *frame,
int buf_size = avpkt->size; int buf_size = avpkt->size;
PCMDecode *s = avctx->priv_data; PCMDecode *s = avctx->priv_data;
int channels = avctx->ch_layout.nb_channels; int channels = avctx->ch_layout.nb_channels;
int sample_size, c, n, ret, samples_per_block; int sample_size = s->sample_size;
int c, n, ret, samples_per_block;
uint8_t *samples; uint8_t *samples;
int32_t *dst_int32_t; int32_t *dst_int32_t;
sample_size = av_get_bits_per_sample(avctx->codec_id) / 8;
samples_per_block = 1; samples_per_block = 1;
if (avctx->codec_id == AV_CODEC_ID_PCM_LXF) { if (avctx->codec_id == AV_CODEC_ID_PCM_LXF) {
/* we process 40-bit blocks per channel for LXF */ /* we process 40-bit blocks per channel for LXF */
samples_per_block = 2; samples_per_block = 2;
sample_size = 5;
} }
if (channels == 0) { if (channels == 0) {