aboutsummaryrefslogtreecommitdiffstats
path: root/libavcodec/g722dsp.c
diff options
context:
space:
mode:
authorPeter Meerwald <pmeerw@pmeerw.net>2015-02-15 12:21:23 +0100
committerMartin Storsjö <martin@martin.st>2015-02-15 22:47:16 +0200
commitb16057b5fe9f02442c52388037891c2e381205fc (patch)
tree09d292d16f6c995500cc6ec6b96494776e9f1e9a /libavcodec/g722dsp.c
parent10f160768b824f00933f33bc69f1fae89a25dfc8 (diff)
downloadffmpeg-b16057b5fe9f02442c52388037891c2e381205fc.tar.gz
g722: Unroll g722_apply_qmf()
Signed-off-by: Peter Meerwald <pmeerw@pmeerw.net> Signed-off-by: Martin Storsjö <martin@martin.st>
Diffstat (limited to 'libavcodec/g722dsp.c')
-rw-r--r--libavcodec/g722dsp.c46
1 files changed, 35 insertions, 11 deletions
diff --git a/libavcodec/g722dsp.c b/libavcodec/g722dsp.c
index 5d3aedb737..f28b1a317c 100644
--- a/libavcodec/g722dsp.c
+++ b/libavcodec/g722dsp.c
@@ -25,20 +25,44 @@
* quadrature mirror filter (QMF) coefficients (ITU-T G.722 Table 11) inlined
* in code below: 3, -11, 12, 32, -210, 951, 3876, -805, 362, -156, 53, -11
*/
-static const int16_t qmf_coeffs[12] = {
- 3, -11, 12, 32, -210, 951, 3876, -805, 362, -156, 53, -11,
-};
static void g722_apply_qmf(const int16_t *prev_samples, int xout[2])
{
- int i;
-
- xout[0] = 0;
- xout[1] = 0;
- for (i = 0; i < 12; i++) {
- MAC16(xout[1], prev_samples[2*i ], qmf_coeffs[i ]);
- MAC16(xout[0], prev_samples[2*i+1], qmf_coeffs[11-i]);
- }
+ xout[1] = MUL16(*prev_samples++, 3);
+ xout[0] = MUL16(*prev_samples++, -11);
+
+ MAC16(xout[1], *prev_samples++, -11);
+ MAC16(xout[0], *prev_samples++, 53);
+
+ MAC16(xout[1], *prev_samples++, 12);
+ MAC16(xout[0], *prev_samples++, -156);
+
+ MAC16(xout[1], *prev_samples++, 32);
+ MAC16(xout[0], *prev_samples++, 362);
+
+ MAC16(xout[1], *prev_samples++, -210);
+ MAC16(xout[0], *prev_samples++, -805);
+
+ MAC16(xout[1], *prev_samples++, 951);
+ MAC16(xout[0], *prev_samples++, 3876);
+
+ MAC16(xout[1], *prev_samples++, 3876);
+ MAC16(xout[0], *prev_samples++, 951);
+
+ MAC16(xout[1], *prev_samples++, -805);
+ MAC16(xout[0], *prev_samples++, -210);
+
+ MAC16(xout[1], *prev_samples++, 362);
+ MAC16(xout[0], *prev_samples++, 32);
+
+ MAC16(xout[1], *prev_samples++, -156);
+ MAC16(xout[0], *prev_samples++, 12);
+
+ MAC16(xout[1], *prev_samples++, 53);
+ MAC16(xout[0], *prev_samples++, -11);
+
+ MAC16(xout[1], *prev_samples++, -11);
+ MAC16(xout[0], *prev_samples++, 3);
}
av_cold void ff_g722dsp_init(G722DSPContext *c)