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-rw-r--r--libavcodec/aacsbr.c7
1 files changed, 4 insertions, 3 deletions
diff --git a/libavcodec/aacsbr.c b/libavcodec/aacsbr.c
index 81b0b4c001..0bfcabb06b 100644
--- a/libavcodec/aacsbr.c
+++ b/libavcodec/aacsbr.c
@@ -1181,14 +1181,15 @@ static void sbr_qmf_synthesis(DSPContext *dsp, FFTContext *mdct,
{
int i, n;
const float *sbr_qmf_window = div ? sbr_qmf_window_ds : sbr_qmf_window_us;
+ const int step = 128 >> div;
float *v;
for (i = 0; i < 32; i++) {
- if (*v_off == 0) {
+ if (*v_off < step) {
int saved_samples = (1280 - 128) >> div;
memcpy(&v0[SBR_SYNTHESIS_BUF_SIZE - saved_samples], v0, saved_samples * sizeof(float));
- *v_off = SBR_SYNTHESIS_BUF_SIZE - saved_samples - (128 >> div);
+ *v_off = SBR_SYNTHESIS_BUF_SIZE - saved_samples - step;
} else {
- *v_off -= 128 >> div;
+ *v_off -= step;
}
v = v0 + *v_off;
if (div) {