X-Git-Url: https://git.sesse.net/?a=blobdiff_plain;f=libavcodec%2Faacdec_fixed.c;h=9b2145c729051bfaa968f66d5793318fc13d4e1f;hb=e1d993d829a6386d1b0514ea38f723d2b31b38fe;hp=1bdb93f5bc876669a2b3b406d71001fed8f6f1b7;hpb=ee96ab2db507b95a694f10b152481cf71842de28;p=ffmpeg

diff --git a/libavcodec/aacdec_fixed.c b/libavcodec/aacdec_fixed.c
index 1bdb93f5bc8..9b2145c7290 100644
--- a/libavcodec/aacdec_fixed.c
+++ b/libavcodec/aacdec_fixed.c
@@ -162,7 +162,7 @@ static void vector_pow43(int *coefs, int len)
     }
 }
 
-static void subband_scale(int *dst, int *src, int scale, int offset, int len)
+static void subband_scale(int *dst, int *src, int scale, int offset, int len, void *log_context)
 {
     int ssign = scale < 0 ? -1 : 1;
     int s = FFABS(scale);
@@ -189,18 +189,18 @@ static void subband_scale(int *dst, int *src, int scale, int offset, int len)
             dst[i] = out * (unsigned)ssign;
         }
     } else {
-        av_log(NULL, AV_LOG_ERROR, "Overflow in subband_scale()\n");
+        av_log(log_context, AV_LOG_ERROR, "Overflow in subband_scale()\n");
     }
 }
 
 static void noise_scale(int *coefs, int scale, int band_energy, int len)
 {
-    int ssign = scale < 0 ? -1 : 1;
-    int s = FFABS(scale);
+    int s = -scale;
     unsigned int round;
     int i, out, c = exp2tab[s & 3];
     int nlz = 0;
 
+    av_assert0(s >= 0);
     while (band_energy > 0x7fff) {
         band_energy >>= 1;
         nlz++;
@@ -216,15 +216,20 @@ static void noise_scale(int *coefs, int scale, int band_energy, int len)
         round = s ? 1 << (s-1) : 0;
         for (i=0; i<len; i++) {
             out = (int)(((int64_t)coefs[i] * c) >> 32);
-            coefs[i] = ((int)(out+round) >> s) * ssign;
+            coefs[i] = -((int)(out+round) >> s);
         }
     }
     else {
         s = s + 32;
-        round = 1 << (s-1);
-        for (i=0; i<len; i++) {
-            out = (int)((int64_t)((int64_t)coefs[i] * c + round) >> s);
-            coefs[i] = out * ssign;
+        if (s > 0) {
+            round = 1 << (s-1);
+            for (i=0; i<len; i++) {
+                out = (int)((int64_t)((int64_t)coefs[i] * c + round) >> s);
+                coefs[i] = -out;
+            }
+        } else {
+            for (i=0; i<len; i++)
+                coefs[i] = -(int64_t)coefs[i] * c * (1 << -s);
         }
     }
 }
@@ -456,7 +461,7 @@ AVCodec ff_aac_fixed_decoder = {
         AV_SAMPLE_FMT_S32P, AV_SAMPLE_FMT_NONE
     },
     .capabilities    = AV_CODEC_CAP_CHANNEL_CONF | AV_CODEC_CAP_DR1,
-    .caps_internal   = FF_CODEC_CAP_INIT_THREADSAFE,
+    .caps_internal   = FF_CODEC_CAP_INIT_THREADSAFE | FF_CODEC_CAP_INIT_CLEANUP,
     .channel_layouts = aac_channel_layout,
     .profiles        = NULL_IF_CONFIG_SMALL(ff_aac_profiles),
     .flush = flush,