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g722: Reduce number of pointers passed to g722_apply_qmf() function

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Signed-off-by: Peter Meerwald <pmeerw@pmeerw.net>
Signed-off-by: Martin Storsjö <martin@martin.st>
This commit is contained in:
Peter Meerwald 2015-02-15 12:21:22 +01:00 committed by Martin Storsjö
parent 6769068313
commit 10f160768b
4 changed files with 14 additions and 15 deletions
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9
libavcodec/g722dec.c
View File

@ -106,7 +106,7 @@ static int g722_decode_frame(AVCodecContext *avctx, void *data,
for (j = 0; j < avpkt->size; j++) {
int ilow, ihigh, rlow, rhigh, dhigh;
int xout1, xout2;
int xout[2];
ihigh = get_bits(&gb, 2);
ilow = get_bits(&gb, 6 - skip);
@ -124,10 +124,9 @@ static int g722_decode_frame(AVCodecContext *avctx, void *data,
c->prev_samples[c->prev_samples_pos++] = rlow + rhigh;
c->prev_samples[c->prev_samples_pos++] = rlow - rhigh;
c->dsp.apply_qmf(c->prev_samples + c->prev_samples_pos - 24,
&xout1, &xout2);
*out_buf++ = av_clip_int16(xout1 >> 11);
*out_buf++ = av_clip_int16(xout2 >> 11);
c->dsp.apply_qmf(c->prev_samples + c->prev_samples_pos - 24, xout);
*out_buf++ = av_clip_int16(xout[0] >> 11);
*out_buf++ = av_clip_int16(xout[1] >> 11);
if (c->prev_samples_pos >= PREV_SAMPLES_BUF_SIZE) {
memmove(c->prev_samples, c->prev_samples + c->prev_samples_pos - 22,
22 * sizeof(c->prev_samples[0]));

10
libavcodec/g722dsp.c
View File

@ -29,15 +29,15 @@ 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 *xout1, int *xout2)
static void g722_apply_qmf(const int16_t *prev_samples, int xout[2])
{
int i;
*xout1 = 0;
*xout2 = 0;
xout[0] = 0;
xout[1] = 0;
for (i = 0; i < 12; i++) {
MAC16(*xout2, prev_samples[2*i ], qmf_coeffs[i ]);
MAC16(*xout1, prev_samples[2*i+1], qmf_coeffs[11-i]);
MAC16(xout[1], prev_samples[2*i ], qmf_coeffs[i ]);
MAC16(xout[0], prev_samples[2*i+1], qmf_coeffs[11-i]);
}
}

2
libavcodec/g722dsp.h
View File

@ -24,7 +24,7 @@
#include <stdint.h>
typedef struct G722DSPContext {
void (*apply_qmf)(const int16_t *prev_samples, int *xout1, int *xout2);
void (*apply_qmf)(const int16_t *prev_samples, int xout[2]);
} G722DSPContext;
void ff_g722dsp_init(G722DSPContext *c);

8
libavcodec/g722enc.c
View File

@ -137,12 +137,12 @@ static const int16_t low_quant[33] = {
static inline void filter_samples(G722Context *c, const int16_t *samples,
int *xlow, int *xhigh)
{
int xout1, xout2;
int xout[2];
c->prev_samples[c->prev_samples_pos++] = samples[0];
c->prev_samples[c->prev_samples_pos++] = samples[1];
c->dsp.apply_qmf(c->prev_samples + c->prev_samples_pos - 24, &xout1, &xout2);
*xlow = xout1 + xout2 >> 14;
*xhigh = xout1 - xout2 >> 14;
c->dsp.apply_qmf(c->prev_samples + c->prev_samples_pos - 24, xout);
*xlow = xout[0] + xout[1] >> 14;
*xhigh = xout[0] - xout[1] >> 14;
if (c->prev_samples_pos >= PREV_SAMPLES_BUF_SIZE) {
memmove(c->prev_samples,
c->prev_samples + c->prev_samples_pos - 22,