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/***************************************************************************
* __________ __ ___.
* Open \______ \ ____ ____ | | _\_ |__ _______ ___
* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
* \/ \/ \/ \/ \/
* $Id$
*
* Copyright (C) 2006 Thom Johansen
* Copyright (C) 2012 Michael Sevakis
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
*
* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
* KIND, either express or implied.
*
****************************************************************************/
#include "config.h"
#include "system.h"
#include "sound.h"
#include "fixedpoint.h"
#include "fracmul.h"
#include "dsp_proc_entry.h"
#include "channel_mode.h"
#include <string.h>
#if 0
/* SOUND_CHAN_STEREO mode is a noop so has no function - just outline one for
* completeness. */
void channel_mode_proc_stereo(struct dsp_proc_entry *this,
struct dsp_buffer **buf_p);
#endif
void channel_mode_proc_mono(struct dsp_proc_entry *this,
struct dsp_buffer **buf_p);
void channel_mode_proc_mono_left(struct dsp_proc_entry *this,
struct dsp_buffer **buf_p);
void channel_mode_proc_mono_right(struct dsp_proc_entry *this,
struct dsp_buffer **buf_p);
void channel_mode_proc_custom(struct dsp_proc_entry *this,
struct dsp_buffer **buf_p);
void channel_mode_proc_karaoke(struct dsp_proc_entry *this,
struct dsp_buffer **buf_p);
static struct channel_mode_data
{
long sw_gain; /* 00h: for mode: custom */
long sw_cross; /* 04h: for mode: custom */
int mode;
} channel_mode_data =
{
.sw_gain = 0,
.sw_cross = 0,
.mode = SOUND_CHAN_STEREO
};
#if 0
/* SOUND_CHAN_STEREO mode is a noop so has no function - just outline one for
* completeness. */
void channel_mode_proc_stereo(struct dsp_proc_entry *this,
struct dsp_buffer **buf_p)
{
/* The channels are each just themselves */
(void)this; (void)buf_p;
}
#endif
#if !defined(CPU_COLDFIRE) && !defined(CPU_ARM)
/* Unoptimized routines */
void channel_mode_proc_mono(struct dsp_proc_entry *this,
struct dsp_buffer **buf_p)
{
struct dsp_buffer *buf = *buf_p;
int32_t *sl = buf->p32[0];
int32_t *sr = buf->p32[1];
int count = buf->remcount;
do
{
int32_t lr = *sl / 2 + *sr / 2;
*sl++ = lr;
*sr++ = lr;
}
while (--count > 0);
(void)this;
}
void channel_mode_proc_custom(struct dsp_proc_entry *this,
struct dsp_buffer **buf_p)
{
struct channel_mode_data *data = (void *)this->data;
struct dsp_buffer *buf = *buf_p;
int32_t *sl = buf->p32[0];
int32_t *sr = buf->p32[1];
int count = buf->remcount;
const int32_t gain = data->sw_gain;
const int32_t cross = data->sw_cross;
do
{
int32_t l = *sl;
int32_t r = *sr;
*sl++ = FRACMUL(l, gain) + FRACMUL(r, cross);
*sr++ = FRACMUL(r, gain) + FRACMUL(l, cross);
}
while (--count > 0);
}
void channel_mode_proc_karaoke(struct dsp_proc_entry *this,
struct dsp_buffer **buf_p)
{
struct dsp_buffer *buf = *buf_p;
int32_t *sl = buf->p32[0];
int32_t *sr = buf->p32[1];
int count = buf->remcount;
do
{
int32_t ch = *sl / 2 - *sr / 2;
*sl++ = ch;
*sr++ = -ch;
}
while (--count > 0);
(void)this;
}
#endif /* CPU */
void channel_mode_proc_mono_left(struct dsp_proc_entry *this,
struct dsp_buffer **buf_p)
{
/* Just copy over the other channel */
struct dsp_buffer *buf = *buf_p;
memcpy(buf->p32[1], buf->p32[0], buf->remcount * sizeof (int32_t));
(void)this;
}
void channel_mode_proc_mono_right(struct dsp_proc_entry *this,
struct dsp_buffer **buf_p)
{
/* Just copy over the other channel */
struct dsp_buffer *buf = *buf_p;
memcpy(buf->p32[0], buf->p32[1], buf->remcount * sizeof (int32_t));
(void)this;
}
void channel_mode_set_config(int value)
{
if (value < 0 || value >= SOUND_CHAN_NUM_MODES)
value = SOUND_CHAN_STEREO; /* Out of range */
if (value == channel_mode_data.mode)
return;
channel_mode_data.mode = value;
dsp_proc_enable(dsp_get_config(CODEC_IDX_AUDIO), DSP_PROC_CHANNEL_MODE,
value != SOUND_CHAN_STEREO);
}
void channel_mode_custom_set_width(int value)
{
long width, straight, cross;
width = value * 0x7fffff / 100;
if (value <= 100)
{
straight = (0x7fffff + width) / 2;
cross = straight - width;
}
else
{
/* straight = (1 + width) / (2 * width) */
straight = fp_div(0x7fffff + width, width, 22);
cross = straight - 0x7fffff;
}
channel_mode_data.sw_gain = straight << 8;
channel_mode_data.sw_cross = cross << 8;
}
static void update_process_fn(struct dsp_proc_entry *this)
{
static const dsp_proc_fn_type fns[SOUND_CHAN_NUM_MODES] =
{
[SOUND_CHAN_STEREO] = NULL,
[SOUND_CHAN_MONO] = channel_mode_proc_mono,
[SOUND_CHAN_CUSTOM] = channel_mode_proc_custom,
[SOUND_CHAN_MONO_LEFT] = channel_mode_proc_mono_left,
[SOUND_CHAN_MONO_RIGHT] = channel_mode_proc_mono_right,
[SOUND_CHAN_KARAOKE] = channel_mode_proc_karaoke,
};
this->process = fns[((struct channel_mode_data *)this->data)->mode];
}
/* Handle format changes and verify the format compatibility */
static intptr_t channel_mode_new_format(struct dsp_proc_entry *this,
struct dsp_config *dsp,
struct sample_format *format)
{
DSP_PRINT_FORMAT(DSP_PROC_CHANNEL_MODE, format);
bool active = format->num_channels >= 2;
dsp_proc_activate(dsp, DSP_PROC_CHANNEL_MODE, active);
if (active)
return PROC_NEW_FORMAT_OK;
/* Can't do this. Sleep until next change. */
DEBUGF(" DSP_PROC_CHANNEL_MODE- deactivated\n");
return PROC_NEW_FORMAT_DEACTIVATED;
(void)this;
}
/* DSP message hook */
static intptr_t channel_mode_configure(struct dsp_proc_entry *this,
struct dsp_config *dsp,
unsigned int setting,
intptr_t value)
{
intptr_t retval = 0;
switch (setting)
{
case DSP_PROC_INIT:
if (value == 0)
this->data = (intptr_t)&channel_mode_data;
update_process_fn(this);
break;
case DSP_PROC_NEW_FORMAT:
retval = channel_mode_new_format(this, dsp,
(struct sample_format *)value);
break;
}
return retval;
}
/* Database entry */
DSP_PROC_DB_ENTRY(
CHANNEL_MODE,
channel_mode_configure);
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