diff options
| author | Chris Robinson <[email protected]> | 2008-01-03 05:36:51 -0800 |
|---|---|---|
| committer | Chris Robinson <[email protected]> | 2008-01-03 05:36:51 -0800 |
| commit | 8fe39042da3369acb4aa8e5a8837709c4338d0f0 (patch) | |
| tree | 8bcd0d73000fa4082e2e62cf13d8f660cffd72d9 /OpenAL32/Include/bs2b.h | |
| parent | 7ef623c71d092f696f5bd7f7170ba475728ecccf (diff) | |
Add the Bauer stereophonic-to-binaural DSP (bs2b) code and hooks
Diffstat (limited to 'OpenAL32/Include/bs2b.h')
| -rw-r--r-- | OpenAL32/Include/bs2b.h | 109 |
1 files changed, 109 insertions, 0 deletions
diff --git a/OpenAL32/Include/bs2b.h b/OpenAL32/Include/bs2b.h new file mode 100644 index 00000000..baf50d0c --- /dev/null +++ b/OpenAL32/Include/bs2b.h @@ -0,0 +1,109 @@ +/*-
+ * Copyright (c) 2005 Boris Mikhaylov
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining
+ * a copy of this software and associated documentation files (the
+ * "Software"), to deal in the Software without restriction, including
+ * without limitation the rights to use, copy, modify, merge, publish,
+ * distribute, sublicense, and/or sell copies of the Software, and to
+ * permit persons to whom the Software is furnished to do so, subject to
+ * the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be
+ * included in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
+ * IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
+ * CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
+ * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
+ * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+
+#ifndef BS2B_H
+#define BS2B_H
+
+/* Number of crossfeed levels */
+#define BS2B_CLEVELS 3
+
+/* Normal crossfeed levels */
+#define BS2B_HIGH_CLEVEL 3
+#define BS2B_MIDDLE_CLEVEL 2
+#define BS2B_LOW_CLEVEL 1
+
+/* Easy crossfeed levels */
+#define BS2B_HIGH_ECLEVEL BS2B_HIGH_CLEVEL + BS2B_CLEVELS
+#define BS2B_MIDDLE_ECLEVEL BS2B_MIDDLE_CLEVEL + BS2B_CLEVELS
+#define BS2B_LOW_ECLEVEL BS2B_LOW_CLEVEL + BS2B_CLEVELS
+
+/* Default crossfeed levels */
+#define BS2B_DEFAULT_CLEVEL BS2B_HIGH_ECLEVEL
+/* Default sample rate (Hz) */
+#define BS2B_DEFAULT_SRATE 44100
+
+#ifdef __cplusplus
+extern "C" {
+#endif /* __cplusplus */
+
+struct bs2b {
+ int level; /* Crossfeed level */
+ int srate; /* Sample rate (Hz) */
+
+ /* Lowpass IIR filter coefficients */
+ double a0_lo;
+ double b1_lo;
+
+ /* Highboost IIR filter coefficients */
+ double a0_hi;
+ double a1_hi;
+ double b1_hi;
+
+ /* Global gain against overloading */
+ double gain;
+
+ /* Buffer of last filtered sample.
+ * [0] - first channel, [1] - second channel
+ */
+ struct t_last_sample {
+ double asis[2];
+ double lo[2];
+ double hi[2];
+ } last_sample;
+};
+
+/* Clear buffers and set new coefficients with new crossfeed level value.
+ * level - crossfeed level of *LEVEL values.
+ */
+void bs2b_set_level(struct bs2b *bs2b, int level);
+
+/* Return current crossfeed level value */
+int bs2b_get_level(struct bs2b *bs2b);
+
+/* Clear buffers and set new coefficients with new sample rate value.
+ * srate - sample rate by Hz.
+ */
+void bs2b_set_srate(struct bs2b *bs2b, int srate);
+
+/* Return current sample rate value */
+int bs2b_get_srate(struct bs2b *bs2b);
+
+/* Clear buffer */
+void bs2b_clear(struct bs2b *bs2b);
+
+/* Return 1 if buffer is clear */
+int bs2b_is_clear(struct bs2b *bs2b);
+
+/* Crossfeeds one stereo sample that are pointed by sample.
+ * [0] - first channel, [1] - second channel.
+ * Returns crossfided samle by sample pointer.
+ */
+
+/* sample poits to floats */
+void bs2b_cross_feed(struct bs2b *bs2b, float *sample);
+
+#ifdef __cplusplus
+} /* extern "C" */
+#endif /* __cplusplus */
+
+#endif /* BS2B_H */
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