diff options
| author | Mans Rullgard <mans@mansr.com> | 2012-08-11 05:23:59 +0100 |
|---|---|---|
| committer | Mans Rullgard <mans@mansr.com> | 2012-08-13 01:03:25 +0100 |
| commit | 4b728b4712403058ac4dc45daa8b5c03a688fadf (patch) | |
| tree | 39ac0931f8fed0f31625523362bcb741e121c628 /libavcodec | |
| parent | f645710cf31f6268fbf279f4515e6012dcd11ac2 (diff) | |
| download | ffmpeg-4b728b4712403058ac4dc45daa8b5c03a688fadf.tar.gz | |
g723.1: avoid unnecessary memcpy() in residual_interp()
Signed-off-by: Mans Rullgard <mans@mansr.com>
Diffstat (limited to 'libavcodec')
| -rw-r--r-- | libavcodec/g723_1.c | 23 |
1 files changed, 15 insertions, 8 deletions
diff --git a/libavcodec/g723_1.c b/libavcodec/g723_1.c index c980ec2f50..050278d16c 100644 --- a/libavcodec/g723_1.c +++ b/libavcodec/g723_1.c @@ -838,10 +838,9 @@ static void residual_interp(int16_t *buf, int16_t *out, int lag, int16_t *vector_ptr = buf + PITCH_MAX; /* Attenuate */ for (i = 0; i < lag; i++) - vector_ptr[i - lag] = vector_ptr[i - lag] * 3 >> 2; - av_memcpy_backptr((uint8_t*)vector_ptr, lag * sizeof(*vector_ptr), - FRAME_LEN * sizeof(*vector_ptr)); - memcpy(out, vector_ptr, FRAME_LEN * sizeof(*vector_ptr)); + out[i] = vector_ptr[i - lag] * 3 >> 2; + av_memcpy_backptr((uint8_t*)(out + lag), lag * sizeof(*out), + (FRAME_LEN - lag) * sizeof(*out)); } else { /* Unvoiced */ for (i = 0; i < FRAME_LEN; i++) { *rseed = *rseed * 521 + 259; @@ -1100,23 +1099,31 @@ static int g723_1_decode_frame(AVCodecContext *avctx, void *data, ppf[j].opt_gain, 1 << 14, 15, SUBFRAME_LEN); + /* Save the excitation for the next frame */ + memcpy(p->prev_excitation, p->excitation + FRAME_LEN, + PITCH_MAX * sizeof(*p->excitation)); } else { p->interp_gain = (p->interp_gain * 3 + 2) >> 2; if (p->erased_frames == 3) { /* Mute output */ memset(p->excitation, 0, (FRAME_LEN + PITCH_MAX) * sizeof(*p->excitation)); + memset(p->prev_excitation, 0, + PITCH_MAX * sizeof(*p->excitation)); memset(p->frame.data[0], 0, (FRAME_LEN + LPC_ORDER) * sizeof(int16_t)); } else { + int16_t *buf = p->audio + LPC_ORDER; + /* Regenerate frame */ - residual_interp(p->excitation, p->audio + LPC_ORDER, p->interp_index, + residual_interp(p->excitation, buf, p->interp_index, p->interp_gain, &p->random_seed); + + /* Save the excitation for the next frame */ + memcpy(p->prev_excitation, buf + (FRAME_LEN - PITCH_MAX), + PITCH_MAX * sizeof(*p->excitation)); } } - /* Save the excitation for the next frame */ - memcpy(p->prev_excitation, p->excitation + FRAME_LEN, - PITCH_MAX * sizeof(*p->excitation)); } else { memset(out, 0, FRAME_LEN * 2); av_log(avctx, AV_LOG_WARNING, |