eac3dec: revert commit r18860. keep the AHT IDCT 24-bit. will make AHT GAQ

[frescor/ffmpeg.git] / libavcodec / ac3dec_data.c

diff --git a/libavcodec/ac3dec_data.c b/libavcodec/ac3dec_data.c
index b9f98f904e5491175ef4ba30db0866eaf7cd23b2..2a3719ea0746dfeb146540bfed4bf89967ed3640 100644 (file)
--- a/libavcodec/ac3dec_data.c
+++ b/libavcodec/ac3dec_data.c
@@ -87,18 +87,19 @@ const int16_t ff_eac3_gaq_remap_2_4_a[9][2] = {
 /**
  * Table E3.6, Gk=2 & Gk=4, B
  * Large mantissa inverse quantization, negative mantissa remapping offsets
+ * Table values from the spec are right-shifted by 8 to simplify calculations.
  * ff_eac3_gaq_remap_3_4_b[hebap-8][Gk=2,4]
  */
-const int16_t ff_eac3_gaq_remap_2_4_b[9][2] = {
-    {  -5461, -1170 },
-    { -11703, -4915 },
-    { -14199, -6606 },
-    { -15327, -7412 },
-    { -15864, -7805 },
-    { -16126, -7999 },
-    { -16255, -8096 },
-    { -16320, -8144 },
-    { -16352, -8168 }
+const int8_t ff_eac3_gaq_remap_2_4_b[9][2] = {
+    { -22,  -5 },
+    { -46, -20 },
+    { -56, -26 },
+    { -60, -29 },
+    { -62, -31 },
+    { -63, -32 },
+    { -64, -32 },
+    { -64, -32 },
+    { -64, -32 },
 };
 
 static const int16_t vq_hebap1[4][6] = {