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authorminoura <minoura@NetBSD.org>2001-05-02 12:53:31 +0000
committerminoura <minoura@NetBSD.org>2001-05-02 12:53:31 +0000
commit1a9388aa50ada5a7197813ccd2cfec72ae2429ed (patch)
treef6ff9dff00cbabc42256d47f34051e7ca648a181 /sys/dev
parentf4b1b4cef9257871323307a1064ffce28877039f (diff)
Software codec for Oki MSM6258 voice synthesizer.
Recording untested.
Diffstat (limited to 'sys/dev')
-rw-r--r--sys/dev/ic/msm6258.c193
-rw-r--r--sys/dev/ic/msm6258var.h43
2 files changed, 236 insertions, 0 deletions
diff --git a/sys/dev/ic/msm6258.c b/sys/dev/ic/msm6258.c
new file mode 100644
index 00000000000..bb43d630980
--- /dev/null
+++ b/sys/dev/ic/msm6258.c
@@ -0,0 +1,193 @@
+/* $NetBSD: msm6258.c,v 1.1 2001/05/02 12:53:31 minoura Exp $ */
+
+/*
+ * Copyright (c) 2001 Tetsuya Isaki. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ * 3. All advertising materials mentioning features or use of this software
+ * must display the following acknowledgement:
+ * This product includes software developed by Tetsuya Isaki.
+ * 4. The name of the author may not be used to endorse or promote products
+ * derived from this software without specific prior written permission
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+ * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+ * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
+ * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+ * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
+ * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
+ * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+/*
+ * OKI MSM6258 ADPCM voice synthesizer codec.
+ */
+
+#include <sys/systm.h>
+#include <sys/device.h>
+#include <sys/malloc.h>
+#include <sys/select.h>
+#include <sys/audioio.h>
+
+#include <dev/audio_if.h>
+#include <dev/audiovar.h>
+#include <dev/auconv.h>
+#include <dev/ic/msm6258var.h>
+
+
+static inline u_char pcm2adpcm_step(short, short *, char *);
+static inline void adpcm2pcm_step(u_char, short *, char *);
+
+
+static int adpcm_estimindex[16] = {
+ 125, 375, 625, 875, 1125, 1375, 1625, 1875,
+ -125, -375, -625, -875, -1125, -1375, -1625, -1875
+};
+
+static int adpcm_estim[49] = {
+ 16, 17, 19, 21, 23, 25, 28, 31, 34, 37,
+ 41, 45, 50, 55, 60, 66, 73, 80, 88, 97,
+ 107, 118, 130, 143, 157, 173, 190, 209, 230, 253,
+ 279, 307, 337, 371, 408, 449, 494, 544, 598, 658,
+ 724, 796, 875, 963, 1060, 1166, 1282, 1411, 1552
+};
+
+static u_char adpcm_estimindex_correct[16] = {
+ -1, -1, -1, -1, 2, 4, 6, 8,
+ -1, -1, -1, -1, 2, 4, 6, 8
+};
+
+struct msm6258_codecvar {
+ short mc_amp;
+ char mc_estim;
+};
+
+struct msm6258_softc {
+ struct device sc_dev;
+ struct msm6258_codecvar *sc_mc;
+ /* MD vars follow */
+};
+
+void *
+msm6258_codec_init (void)
+{
+ struct msm6258_codecvar *r;
+
+ r = malloc (sizeof(*r), M_DEVBUF, M_NOWAIT);
+ if (r == 0)
+ return 0;
+ r->mc_amp = r->mc_estim = 0;
+
+ return r;
+}
+
+static inline u_char
+pcm2adpcm_step(short a, short *y, char *x)
+{
+ int c, d;
+ register unsigned char b;
+
+ a -= *y;
+ d = adpcm_estim[*x];
+ c = a * 4 * 1000;
+ c /= d;
+
+ if (c < 0) {
+ b = (unsigned char)(-c/1000);
+ if (b >= 8)
+ b = 7;
+ b |= 0x08;
+ } else {
+ b = (unsigned char)(c/1000);
+ if (b >= 8)
+ b = 7;
+ }
+
+ *y += (short)(adpcm_estimindex[b] * d / 1000);
+ *x += adpcm_estimindex_correct[b];
+ if (*x < 0)
+ *x = 0;
+ else if (*x > 48)
+ *x = 48;
+ return b;
+}
+
+void
+msm6258_ulinear8_to_adpcm(void *hdl, u_char *p, int cc)
+{
+ struct msm6258_softc *sc = hdl;
+ struct msm6258_codecvar *mc = sc->sc_mc;
+ char *x = &(mc->mc_estim);
+ short *y = &(mc->mc_amp);
+ register int i;
+ u_char f;
+
+if ((int) p % 2) printf("p: %p\n", p);
+ for (i = 0; i < cc; i += 2) {
+ f = pcm2adpcm_step(p[i], y, x);
+ p[i] = f + (pcm2adpcm_step(p[i+1], y, x) << 4);
+ p[i+1] = 0;
+ }
+}
+
+void
+msm6258_mulaw_to_adpcm(void *hdl, u_char *p, int cc)
+{
+ mulaw_to_ulinear8(hdl, p, cc);
+ msm6258_ulinear8_to_adpcm(hdl, p, cc);
+}
+
+static inline void
+adpcm2pcm_step(u_char b, short *y, char *x)
+{
+ *y += (short)(adpcm_estimindex[b] * adpcm_estim[*x]);
+ *x += adpcm_estimindex_correct[b];
+ if (*x < 0)
+ *x = 0;
+ else if (*x > 48)
+ *x = 48;
+}
+
+/* ADPCM stream must be converted in order. */
+u_char tmpbuf[AU_RING_SIZE]; /* XXX */
+
+void
+msm6258_adpcm_to_ulinear8(void *hdl, u_char *p, int cc)
+{
+ struct msm6258_softc *sc = hdl;
+ struct msm6258_codecvar *mc = sc->sc_mc;
+ char *x = &(mc->mc_estim);
+ short *y = &(mc->mc_amp);
+ u_char a, b;
+ int i;
+
+ for (i = 0; i < cc;) {
+ a = *p;
+ p++;
+ b = a & 0x0f;
+ adpcm2pcm_step(b, y, x);
+ tmpbuf[i++] = *y;
+ b = a >> 4;
+ adpcm2pcm_step(b, y, x);
+ tmpbuf[i++] = *y;
+ }
+ memcpy(p, tmpbuf, cc*2);
+}
+
+void
+msm6258_adpcm_to_mulaw(void *hdl, u_char *p, int cc)
+{
+ msm6258_adpcm_to_ulinear8(hdl, p, cc);
+ ulinear8_to_mulaw(hdl, p, cc*2);
+}
diff --git a/sys/dev/ic/msm6258var.h b/sys/dev/ic/msm6258var.h
new file mode 100644
index 00000000000..c5fdc7a88b0
--- /dev/null
+++ b/sys/dev/ic/msm6258var.h
@@ -0,0 +1,43 @@
+/* $NetBSD: msm6258var.h,v 1.1 2001/05/02 12:53:31 minoura Exp $ */
+
+/*
+ * Copyright (c) 2001 Tetsuya Isaki. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ * 3. All advertising materials mentioning features or use of this software
+ * must display the following acknowledgement:
+ * This product includes software developed by Tetsuya Isaki.
+ * 4. The name of the author may not be used to endorse or promote products
+ * derived from this software without specific prior written permission
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+ * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+ * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
+ * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+ * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
+ * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
+ * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+/*
+ * OKI MSM6258 ADPCM voice synthesizer codec.
+ */
+
+#include <dev/auconv.h>
+
+void *msm6258_codec_init (void);
+void msm6258_ulinear8_to_adpcm (void *, u_char *, int);
+void msm6258_mulaw_to_adpcm (void *, u_char *, int);
+void msm6258_adpcm_to_ulinear8 (void *, u_char *, int);
+void msm6258_adpcm_to_mulaw (void *, u_char *, int);