This commit was manufactured by cvs2svn to create branch 'vserver'.

[linux-2.6.git] / sound / aoa / codecs / snd-aoa-codec-tas-basstreble.h

diff --git a/sound/aoa/codecs/snd-aoa-codec-tas-basstreble.h b/sound/aoa/codecs/snd-aoa-codec-tas-basstreble.h
new file mode 100644 (file)
index 0000000..69b6113
--- /dev/null
+++ b/sound/aoa/codecs/snd-aoa-codec-tas-basstreble.h
@@ -0,0 +1,134 @@
+/*
+ * This file is only included exactly once!
+ *
+ * The tables here are derived from the tas3004 datasheet,
+ * modulo typo corrections and some smoothing...
+ */
+
+#define TAS3004_TREBLE_MIN     0
+#define TAS3004_TREBLE_MAX     72
+#define TAS3004_BASS_MIN       0
+#define TAS3004_BASS_MAX       72
+#define TAS3004_TREBLE_ZERO    36
+#define TAS3004_BASS_ZERO      36
+
+static u8 tas3004_treble_table[] = {
+       150, /* -18 dB */
+       149,
+       148,
+       147,
+       146,
+       145,
+       144,
+       143,
+       142,
+       141,
+       140,
+       139,
+       138,
+       137,
+       136,
+       135,
+       134,
+       133,
+       132,
+       131,
+       130,
+       129,
+       128,
+       127,
+       126,
+       125,
+       124,
+       123,
+       122,
+       121,
+       120,
+       119,
+       118,
+       117,
+       116,
+       115,
+       114, /* 0 dB */
+       113,
+       112,
+       111,
+       109,
+       108,
+       107,
+       105,
+       104,
+       103,
+       101,
+       99,
+       98,
+       96,
+       93,
+       91,
+       89,
+       86,
+       83,
+       81,
+       77,
+       74,
+       71,
+       67,
+       63,
+       59,
+       54,
+       49,
+       44,
+       38,
+       32,
+       26,
+       19,
+       10,
+       4,
+       2,
+       1, /* +18 dB */
+};
+
+static inline u8 tas3004_treble(int idx)
+{
+       return tas3004_treble_table[idx];
+}
+
+/* I only save the difference here to the treble table
+ * so that the binary is smaller...
+ * I have also ignored completely differences of
+ * +/- 1
+ */
+static s8 tas3004_bass_diff_to_treble[] = {
+       2, /* 7 dB, offset 50 */
+       2,
+       2,
+       2,
+       2,
+       1,
+       2,
+       2,
+       2,
+       3,
+       4,
+       4,
+       5,
+       6,
+       7,
+       8,
+       9,
+       10,
+       11,
+       14,
+       13,
+       8,
+       1, /* 18 dB */
+};
+
+static inline u8 tas3004_bass(int idx)
+{
+       u8 result = tas3004_treble_table[idx];
+
+       if (idx >= 50)
+               result += tas3004_bass_diff_to_treble[idx-50];
+       return result;
+}