Rockbox open source high quality audio player as a Music Player Daemon
mpris
rockbox
mpd
libadwaita
audio
rust
zig
deno
Expand the range of the inverse quant table in WMA Pro.
Several of the problem samples on the tracker use values outside this
range. Trying the larger table doesn't quite seem to fix things, but
its only a small amount of additional memory and looking at ffmpeg,
I think the larger table is correct.
Change-Id: Id046e62b68550701aa1f80c9abd0a1dcd711bd0d
+16
-3
+16
-3
lib/rbcodec/codecs/libwmapro/quant.h
+16
-3
lib/rbcodec/codecs/libwmapro/quant.h
···
8
8
* floating point value is :
9
9
* quant = pow(10.0, exp/20)
10
10
* 'exp' is an integer value which I have exmerimentally found to fall in the
11
-
* range (50,170). */
12
-
const int32_t quant_tab[121] = {
11
+
* range (0,170). */
12
+
const int32_t quant_tab[171] = {
13
+
0x00000001, 0x00000001,
14
+
0x00000001, 0x00000001, 0x00000002, 0x00000002,
15
+
0x00000002, 0x00000002, 0x00000003, 0x00000003,
16
+
0x00000003, 0x00000004, 0x00000004, 0x00000004,
17
+
0x00000005, 0x00000006, 0x00000006, 0x00000007,
18
+
0x00000008, 0x00000009, 0x0000000a, 0x0000000b,
19
+
0x0000000d, 0x0000000e, 0x00000010, 0x00000012,
20
+
0x00000014, 0x00000016, 0x00000019, 0x0000001c,
21
+
0x00000020, 0x00000023, 0x00000028, 0x0000002d,
22
+
0x00000032, 0x00000038, 0x0000003f, 0x00000047,
23
+
0x0000004f, 0x00000059, 0x00000064, 0x00000070,
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+
0x0000007e, 0x0000008d, 0x0000009e, 0x000000b2,
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+
0x000000c8, 0x000000e0, 0x000000fb, 0x0000011a,
13
26
0x0000013C, 0x00000163, 0x0000018E, 0x000001BF,
14
27
0x000001F5, 0x00000232, 0x00000277, 0x000002C4,
15
28
0x0000031A, 0x0000037B, 0x000003E8, 0x00000462,
···
43
56
0x12D940B6
44
57
};
45
58
46
-
#define EXP_MIN 50
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+
#define EXP_MIN 0
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60
#define EXP_MAX 170
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61
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62
/* return the correct value of quant based on exp */