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aacsbr: use a swap index for the Y matrix rather than copy buffers.

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Signed-off-by: Alex Converse <alex.converse@gmail.com>
This commit is contained in:
Christophe Gisquet 2012-02-23 22:25:44 +00:00 committed by Alex Converse
parent 63c9de6469
commit cc412b7104
2 changed files with 20 additions and 14 deletions
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33
libavcodec/aacsbr.c
View File

@ -1349,8 +1349,8 @@ static int sbr_hf_gen(AACContext *ac, SpectralBandReplication *sbr,
/// Generate the subband filtered lowband
static int sbr_x_gen(SpectralBandReplication *sbr, float X[2][38][64],
const float X_low[32][40][2], const float Y[2][38][64][2],
int ch)
const float Y0[38][64][2], const float Y1[38][64][2],
const float X_low[32][40][2], int ch)
{
int k, i;
const int i_f = 32;
@ -1364,8 +1364,8 @@ static int sbr_x_gen(SpectralBandReplication *sbr, float X[2][38][64],
}
for (; k < sbr->kx[0] + sbr->m[0]; k++) {
for (i = 0; i < i_Temp; i++) {
X[0][i][k] = Y[0][i + i_f][k][0];
X[1][i][k] = Y[0][i + i_f][k][1];
X[0][i][k] = Y0[i + i_f][k][0];
X[1][i][k] = Y0[i + i_f][k][1];
}
}
@ -1377,8 +1377,8 @@ static int sbr_x_gen(SpectralBandReplication *sbr, float X[2][38][64],
}
for (; k < sbr->kx[1] + sbr->m[1]; k++) {
for (i = i_Temp; i < i_f; i++) {
X[0][i][k] = Y[1][i][k][0];
X[1][i][k] = Y[1][i][k][1];
X[0][i][k] = Y1[i][k][0];
X[1][i][k] = Y1[i][k][1];
}
}
return 0;
@ -1537,7 +1537,8 @@ static void sbr_gain_calc(AACContext *ac, SpectralBandReplication *sbr,
}
/// Assembling HF Signals (14496-3 sp04 p220)
static void sbr_hf_assemble(float Y[2][38][64][2], const float X_high[64][40][2],
static void sbr_hf_assemble(float Y1[38][64][2],
const float X_high[64][40][2],
SpectralBandReplication *sbr, SBRData *ch_data,
const int e_a[2])
{
@ -1559,7 +1560,6 @@ static void sbr_hf_assemble(float Y[2][38][64][2], const float X_high[64][40][2]
float (*g_temp)[48] = ch_data->g_temp, (*q_temp)[48] = ch_data->q_temp;
int indexnoise = ch_data->f_indexnoise;
int indexsine = ch_data->f_indexsine;
memcpy(Y[0], Y[1], sizeof(Y[0]));
if (sbr->reset) {
for (i = 0; i < h_SL; i++) {
@ -1602,18 +1602,18 @@ static void sbr_hf_assemble(float Y[2][38][64][2], const float X_high[64][40][2]
q_filt = q_temp[i];
}
sbr->dsp.hf_g_filt(Y[1][i] + kx, X_high + kx, g_filt, m_max,
sbr->dsp.hf_g_filt(Y1[i] + kx, X_high + kx, g_filt, m_max,
i + ENVELOPE_ADJUSTMENT_OFFSET);
if (e != e_a[0] && e != e_a[1]) {
sbr->dsp.hf_apply_noise[indexsine](Y[1][i] + kx, sbr->s_m[e],
sbr->dsp.hf_apply_noise[indexsine](Y1[i] + kx, sbr->s_m[e],
q_filt, indexnoise,
kx, m_max);
} else {
for (m = 0; m < m_max; m++) {
Y[1][i][m + kx][0] +=
Y1[i][m + kx][0] +=
sbr->s_m[e][m] * phi[0][indexsine];
Y[1][i][m + kx][1] +=
Y1[i][m + kx][1] +=
sbr->s_m[e][m] * (phi[1][indexsine] * phi_sign);
phi_sign = -phi_sign;
}
@ -1653,12 +1653,17 @@ void ff_sbr_apply(AACContext *ac, SpectralBandReplication *sbr, int id_aac,
sbr_mapping(ac, sbr, &sbr->data[ch], sbr->data[ch].e_a);
sbr_env_estimate(sbr->e_curr, sbr->X_high, sbr, &sbr->data[ch]);
sbr_gain_calc(ac, sbr, &sbr->data[ch], sbr->data[ch].e_a);
sbr_hf_assemble(sbr->data[ch].Y, sbr->X_high, sbr, &sbr->data[ch],
sbr->data[ch].Ypos ^= 1;
sbr_hf_assemble(sbr->data[ch].Y[sbr->data[ch].Ypos],
sbr->X_high, sbr, &sbr->data[ch],
sbr->data[ch].e_a);
}
/* synthesis */
sbr_x_gen(sbr, sbr->X[ch], sbr->X_low, sbr->data[ch].Y, ch);
sbr_x_gen(sbr, sbr->X[ch],
sbr->data[ch].Y[1-sbr->data[ch].Ypos],
sbr->data[ch].Y[ sbr->data[ch].Ypos],
sbr->X_low, ch);
}
if (ac->m4ac.ps == 1) {

1
libavcodec/sbr.h
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@ -88,6 +88,7 @@ typedef struct {
///QMF values of the original signal
float W[2][32][32][2];
///QMF output of the HF adjustor
int Ypos;
DECLARE_ALIGNED(16, float, Y)[2][38][64][2];
DECLARE_ALIGNED(16, float, g_temp)[42][48];
float q_temp[42][48];