/***************************************************************************
 *             __________               __   ___.
 *   Open      \______   \ ____   ____ |  | _\_ |__   _______  ___
 *   Source     |       _//  _ \_/ ___\|  |/ /| __ \ /  _ \  \/  /
 *   Jukebox    |    |   (  <_> )  \___|    < | \_\ (  <_> > <  <
 *   Firmware   |____|_  /\____/ \___  >__|_ \|___  /\____/__/\_ \
 *                     \/            \/     \/    \/            \/
 * $Id$
 *
 * Copyright (C) 2005 by Linus Nielsen Feltzing
 * Copyright (C) 2007 by Christian Gmeiner
 *
 * 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 <stdbool.h>
#include <stdio.h>
#include "config.h"
#include "sound.h"
#include "logf.h"
#ifndef SIMULATOR
#include "i2c.h"
#include "mas.h"
#if CONFIG_CPU == PNX0101
#include "pnx0101.h"
#endif
#include "dac.h"
#include "system.h"
#if CONFIG_CODEC == SWCODEC
#include "pcm.h"
#endif
#endif

/* TODO
 * find a nice way to handle 1.5db steps -> see wm8751 ifdef in sound_set_bass/treble
*/

#if !defined(VOLUME_MIN) && !defined(VOLUME_MAX)
#warning define for VOLUME_MIN and VOLUME_MAX is missing
#define VOLUME_MIN -700
#define VOLUME_MAX  0
#endif

/* volume/balance/treble/bass interdependency main part */
#define VOLUME_RANGE (VOLUME_MAX - VOLUME_MIN)

#ifndef SIMULATOR
extern bool audio_is_initialized;

#if (CONFIG_CODEC == MAS3587F) || (CONFIG_CODEC == MAS3539F)
extern unsigned long shadow_io_control_main;
extern unsigned shadow_codec_reg0;
#endif
#endif /* SIMULATOR */

#ifdef SIMULATOR
/* dummy for sim */
const struct sound_settings_info audiohw_settings[] = {
    [SOUND_VOLUME]        = {"dB", 0,  1, VOLUME_MIN / 10, VOLUME_MAX / 10, -25},
    [SOUND_BASS]          = {"dB", 0,  1, -24,  24,   0},
    [SOUND_TREBLE]        = {"dB", 0,  1, -24,  24,   0},
    [SOUND_BALANCE]       = {"%",  0,  1,-100, 100,   0},
    [SOUND_CHANNELS]      = {"",   0,  1,   0,   5,   0},
    [SOUND_STEREO_WIDTH]  = {"%",  0,  5,   0, 250, 100},
#if defined(HAVE_RECORDING)
    [SOUND_LEFT_GAIN]     = {"dB", 1,  1,-128,  96,   0},
    [SOUND_RIGHT_GAIN]    = {"dB", 1,  1,-128,  96,   0},
    [SOUND_MIC_GAIN]      = {"dB", 1,  1,-128, 108,  16},
#endif
#if defined(AUDIOHW_HAVE_BASS_CUTOFF)
    [SOUND_BASS_CUTOFF]   = {"",   0,  1,   1,   4,   1},
#endif
#if defined(AUDIOHW_HAVE_TREBLE_CUTOFF)
    [SOUND_TREBLE_CUTOFF] = {"",   0,  1,   1,   4,   1},
#endif
#if (CONFIG_CODEC == MAS3587F) || (CONFIG_CODEC == MAS3539F)
    [SOUND_LOUDNESS]      = {"dB", 0,  1,   0,  17,   0},
    [SOUND_AVC]           = {"",   0,  1,  -1,   4,   0},
    [SOUND_MDB_STRENGTH]  = {"dB", 0,  1,   0, 127,  48},
    [SOUND_MDB_HARMONICS] = {"%",  0,  1,   0, 100,  50},
    [SOUND_MDB_CENTER]    = {"Hz", 0, 10,  20, 300,  60},
    [SOUND_MDB_SHAPE]     = {"Hz", 0, 10,  50, 300,  90},
    [SOUND_MDB_ENABLE]    = {"",   0,  1,   0,   1,   0},
    [SOUND_SUPERBASS]     = {"",   0,  1,   0,   1,   0},
#endif
};
#endif

const char *sound_unit(int setting)
{
    return audiohw_settings[setting].unit;
}

int sound_numdecimals(int setting)
{
    return audiohw_settings[setting].numdecimals;
}

int sound_steps(int setting)
{
    return audiohw_settings[setting].steps;
}

int sound_min(int setting)
{
    return audiohw_settings[setting].minval;
}

int sound_max(int setting)
{
    return audiohw_settings[setting].maxval;
}

int sound_default(int setting)
{
    return audiohw_settings[setting].defaultval;
}

sound_set_type* sound_get_fn(int setting)
{
    sound_set_type* result = NULL;

    switch (setting) {
        case SOUND_VOLUME:
            result = sound_set_volume;
            break;

        case SOUND_BASS:
            result = sound_set_bass;
            break;

        case SOUND_TREBLE:
            result = sound_set_treble;
            break;

        case SOUND_BALANCE:
            result = sound_set_balance;
            break;

        case SOUND_CHANNELS:
            result = sound_set_channels;
            break;

        case SOUND_STEREO_WIDTH:
            result = sound_set_stereo_width;
            break;

#if defined(AUDIOHW_HAVE_BASS_CUTOFF)
        case SOUND_BASS_CUTOFF:
            result = sound_set_bass_cutoff;
            break;
#endif

#if defined(AUDIOHW_HAVE_TREBLE_CUTOFF)
        case SOUND_TREBLE_CUTOFF:
            result = sound_set_treble_cutoff;
            break;
#endif

#if (CONFIG_CODEC == MAS3587F) || (CONFIG_CODEC == MAS3539F)
        case SOUND_LOUDNESS:
            result = sound_set_loudness;
            break;

        case SOUND_AVC:
            result = sound_set_avc;
            break;

        case SOUND_MDB_STRENGTH:
            result = sound_set_mdb_strength;
            break;

        case SOUND_MDB_HARMONICS:
            result = sound_set_mdb_harmonics;
            break;

        case SOUND_MDB_CENTER:
            result = sound_set_mdb_center;
            break;

        case SOUND_MDB_SHAPE:
            result = sound_set_mdb_shape;
            break;

        case SOUND_MDB_ENABLE:
            result = sound_set_mdb_enable;
            break;

        case SOUND_SUPERBASS:
            result = sound_set_superbass;
            break;
#endif
    }

    return result;
}

#if CONFIG_CODEC == SWCODEC
/* Copied from dsp.h, nasty nasty, but we don't want to include dsp.h */
enum {
    DSP_CALLBACK_SET_PRESCALE = 0,
    DSP_CALLBACK_SET_BASS,
    DSP_CALLBACK_SET_TREBLE,
    DSP_CALLBACK_SET_CHANNEL_CONFIG,
    DSP_CALLBACK_SET_STEREO_WIDTH
};

static int (*dsp_callback)(int, intptr_t) = NULL;

void sound_set_dsp_callback(int (*func)(int, intptr_t))
{
    dsp_callback = func;
}
#endif

#ifndef SIMULATOR
#if CONFIG_CODEC == MAS3507D
/* convert tenth of dB volume (-780..+180) to dac3550 register value */
static int tenthdb2reg(int db)
{
    if (db < -540)                  /* 3 dB steps */
        return (db + 780) / 30;
    else                            /* 1.5 dB steps */
        return (db + 660) / 15;
}
#endif


#if !defined(AUDIOHW_HAVE_CLIPPING)
/*
 * The prescaler compensates for any kind of boosts, to prevent clipping.
 *
 * It's basically just a measure to make sure that audio does not clip during
 * tone controls processing, like if i want to boost bass 12 dB, i can decrease
 * the audio amplitude by -12 dB before processing, then increase master gain
 * by 12 dB after processing.
 */

/* all values in tenth of dB    MAS3507D    UDA1380  */
int current_volume = 0;    /* -780..+180  -840..   0 */
int current_balance = 0;   /* -960..+960  -840..+840 */
int current_treble = 0;    /* -150..+150     0.. +60 */
int current_bass = 0;      /* -150..+150     0..+240 */

static void set_prescaled_volume(void)
{
    int prescale = 0;
    int l, r;

/* The WM codecs listed don't have suitable prescaler functionality, so we let
 * the prescaler stay at 0 for these unless SW tone controls are in use */
#if defined(HAVE_SW_TONE_CONTROLS) || !(defined(HAVE_WM8975) \
    || defined(HAVE_WM8731) || defined(HAVE_WM8721) || defined(HAVE_WM8751) \
    || defined(HAVE_WM8758) || defined(HAVE_WM8985)) || defined(HAVE_TSC2100)

    prescale = MAX(current_bass, current_treble);
    if (prescale < 0)
        prescale = 0;  /* no need to prescale if we don't boost
                          bass or treble */

    /* Gain up the analog volume to compensate the prescale gain reduction,
     * but if this would push the volume over the top, reduce prescaling
     * instead (might cause clipping). */
    if (current_volume + prescale > VOLUME_MAX)
        prescale = VOLUME_MAX - current_volume;
#endif

#if defined(AUDIOHW_HAVE_PRESCALER)
    audiohw_set_prescaler(prescale);
#else
    dsp_callback(DSP_CALLBACK_SET_PRESCALE, prescale);
#endif

    if (current_volume == VOLUME_MIN)
        prescale = 0;  /* Make sure the chip gets muted at VOLUME_MIN */

    l = r = current_volume + prescale;

    if (current_balance > 0)
    {
        l -= current_balance;
        if (l < VOLUME_MIN)
            l = VOLUME_MIN;
    }
    if (current_balance < 0)
    {
        r += current_balance;
        if (r < VOLUME_MIN)
            r = VOLUME_MIN;
    }

#if CONFIG_CODEC == MAS3507D
    dac_volume(tenthdb2reg(l), tenthdb2reg(r), false);
#elif defined(HAVE_UDA1380) || defined(HAVE_WM8975) || defined(HAVE_WM8758) \
   || defined(HAVE_WM8731) || defined(HAVE_WM8721) || defined(HAVE_WM8751) \
   || defined(HAVE_AS3514) || defined(HAVE_TSC2100)
    audiohw_set_master_vol(tenthdb2master(l), tenthdb2master(r));
#if defined(HAVE_WM8975) || defined(HAVE_WM8758) \
   || (defined(HAVE_WM8751) && !defined(MROBE_100)) \
   || defined(HAVE_TSC2100) || defined(HAVE_WM8985)
    audiohw_set_lineout_vol(tenthdb2master(0), tenthdb2master(0));
#endif

#elif defined(HAVE_TLV320) || defined(HAVE_WM8978) || defined(HAVE_WM8985)
    audiohw_set_headphone_vol(tenthdb2master(l), tenthdb2master(r));
#endif
}
#endif /* (CONFIG_CODEC == MAS3507D) || defined HAVE_UDA1380 */
#endif /* !SIMULATOR */


#ifndef SIMULATOR

#if (CONFIG_CODEC == MAS3587F) || (CONFIG_CODEC == MAS3539F)
unsigned long mdb_shape_shadow = 0;
unsigned long loudness_shadow = 0;
#endif

void sound_set_volume(int value)
{
    if(!audio_is_initialized)
        return;

#if defined(AUDIOHW_HAVE_CLIPPING)
    audiohw_set_volume(value);
#elif CONFIG_CPU == PNX0101
    int tmp = (60 - value * 4) & 0xff;
    CODECVOL = tmp | (tmp << 8);
#else
    current_volume = value * 10;     /* tenth of dB */
    set_prescaled_volume();
#endif
}

void sound_set_balance(int value)
{
    if(!audio_is_initialized)
        return;

#ifdef AUDIOHW_HAVE_BALANCE
    audiohw_set_balance(value);
#else
    current_balance = value * VOLUME_RANGE / 100; /* tenth of dB */
    set_prescaled_volume();
#endif
}

void sound_set_bass(int value)
{
    if(!audio_is_initialized)
        return;

#if !defined(AUDIOHW_HAVE_CLIPPING)
#if defined(HAVE_WM8751)
    current_bass = value;
#else
    current_bass =  value * 10;
#endif
#endif

#if defined(AUDIOHW_HAVE_BASS)
    audiohw_set_bass(value);
#else
    dsp_callback(DSP_CALLBACK_SET_BASS, current_bass);
#endif

#if !defined(AUDIOHW_HAVE_CLIPPING)
    set_prescaled_volume();
#endif
}

void sound_set_treble(int value)
{
    if(!audio_is_initialized)
        return;

#if !defined(AUDIOHW_HAVE_CLIPPING)
#if defined(HAVE_WM8751)
    current_treble = value;
#else
    current_treble =  value * 10;
#endif
#endif

#if defined(AUDIOHW_HAVE_TREBLE)
    audiohw_set_treble(value);
#else
    dsp_callback(DSP_CALLBACK_SET_TREBLE, current_treble);
#endif

#if !defined(AUDIOHW_HAVE_CLIPPING)
    set_prescaled_volume();
#endif
}

void sound_set_channels(int value)
{
    if(!audio_is_initialized)
        return;

#if CONFIG_CODEC == SWCODEC
    dsp_callback(DSP_CALLBACK_SET_CHANNEL_CONFIG, value);
#else
    audiohw_set_channel(value);
#endif
}

void sound_set_stereo_width(int value)
{
    if(!audio_is_initialized)
        return;

#if CONFIG_CODEC == SWCODEC
    dsp_callback(DSP_CALLBACK_SET_STEREO_WIDTH, value);
#else
    audiohw_set_stereo_width(value);
#endif
}

#if defined(AUDIOHW_HAVE_BASS_CUTOFF)
void sound_set_bass_cutoff(int value)
{
    if(!audio_is_initialized)
        return;

    audiohw_set_bass_cutoff(value);
}
#endif

#if defined(AUDIOHW_HAVE_TREBLE_CUTOFF)
void sound_set_treble_cutoff(int value)
{
    if(!audio_is_initialized)
        return;

    audiohw_set_treble_cutoff(value);
}
#endif

#if (CONFIG_CODEC == MAS3587F) || (CONFIG_CODEC == MAS3539F)
void sound_set_loudness(int value)
{
    if(!audio_is_initialized)
        return;
    loudness_shadow = (loudness_shadow & 0x04) |
                       (MAX(MIN(value * 4, 0x44), 0) << 8);
    mas_codec_writereg(MAS_REG_KLOUDNESS, loudness_shadow);
}

void sound_set_avc(int value)
{
    if(!audio_is_initialized)
        return;
    int tmp;
    switch (value) {
        case 1: /* 20ms */
            tmp = (0x1 << 8) | (0x8 << 12);
            break;
        case 2: /* 2s */
            tmp = (0x2 << 8) | (0x8 << 12);
            break;
        case 3: /* 4s */
            tmp = (0x4 << 8) | (0x8 << 12);
            break;
        case 4: /* 8s */
            tmp = (0x8 << 8) | (0x8 << 12);
            break;
        case -1: /* turn off and then turn on again to decay quickly */
            tmp = mas_codec_readreg(MAS_REG_KAVC);
            mas_codec_writereg(MAS_REG_KAVC, 0);
            break;
        default: /* off */
            tmp = 0;
            break;
    }
    mas_codec_writereg(MAS_REG_KAVC, tmp);     
}

void sound_set_mdb_strength(int value)
{
    if(!audio_is_initialized)
        return;
    mas_codec_writereg(MAS_REG_KMDB_STR, (value & 0x7f) << 8); 
}

void sound_set_mdb_harmonics(int value)
{
    if(!audio_is_initialized)
        return;
    int tmp = value * 127 / 100;
    mas_codec_writereg(MAS_REG_KMDB_HAR, (tmp & 0x7f) << 8);
}

void sound_set_mdb_center(int value)
{
    if(!audio_is_initialized)
        return;
    mas_codec_writereg(MAS_REG_KMDB_FC, (value/10) << 8);
}

void sound_set_mdb_shape(int value)
{
    if(!audio_is_initialized)
        return;
    mdb_shape_shadow = (mdb_shape_shadow & 0x02) | ((value/10) << 8);
    mas_codec_writereg(MAS_REG_KMDB_SWITCH, mdb_shape_shadow);
}

void sound_set_mdb_enable(int value)
{
    if(!audio_is_initialized)
        return;
    mdb_shape_shadow = (mdb_shape_shadow & ~0x02) | (value?2:0);
    mas_codec_writereg(MAS_REG_KMDB_SWITCH, mdb_shape_shadow);
}

void sound_set_superbass(int value)
{
    if(!audio_is_initialized)
        return;
    loudness_shadow = (loudness_shadow & ~0x04) | (value?4:0);
    mas_codec_writereg(MAS_REG_KLOUDNESS, loudness_shadow);
}
#endif /* (CONFIG_CODEC == MAS3587F) || (CONFIG_CODEC == MAS3539F) */

#else /* SIMULATOR */
int sim_volume;
void sound_set_volume(int value)
{
    /* 128 is SDL_MIX_MAXVOLUME */
    sim_volume = 128 * (value - VOLUME_MIN / 10) / (VOLUME_RANGE / 10);
}

void sound_set_balance(int value)
{
    (void)value;
}

void sound_set_bass(int value)
{
    (void)value;
}

void sound_set_treble(int value)
{
    (void)value;
}

void sound_set_channels(int value)
{
    (void)value;
}

void sound_set_stereo_width(int value)
{
    (void)value;
}

#if (CONFIG_CODEC == MAS3587F) || (CONFIG_CODEC == MAS3539F)
void sound_set_loudness(int value)
{
    (void)value;
}

void sound_set_avc(int value)
{
    (void)value;
}

void sound_set_mdb_strength(int value)
{
    (void)value;
}

void sound_set_mdb_harmonics(int value)
{
    (void)value;
}

void sound_set_mdb_center(int value)
{
    (void)value;
}

void sound_set_mdb_shape(int value)
{
    (void)value;
}

void sound_set_mdb_enable(int value)
{
    (void)value;
}

void sound_set_superbass(int value)
{
    (void)value;
}
#endif /* (CONFIG_CODEC == MAS3587F) || (CONFIG_CODEC == MAS3539F) */

#if defined(HAVE_WM8758) || defined(HAVE_WM8985)
void sound_set_bass_cutoff(int value)
{
    (void) value;
}

void sound_set_treble_cutoff(int value)
{
    (void) value;
}
#endif /* HAVE_WM8758 */

#endif /* SIMULATOR */

void sound_set(int setting, int value)
{
    sound_set_type* sound_set_val = sound_get_fn(setting);
    if (sound_set_val)
        sound_set_val(value);
}

#if (!defined(HAVE_AS3514) && !defined (HAVE_WM8731) && !defined(HAVE_TSC2100)) \
    || defined(SIMULATOR)
int sound_val2phys(int setting, int value)
{
#if CONFIG_CODEC == MAS3587F
    int result = 0;

    switch(setting)
    {
        case SOUND_LEFT_GAIN:
        case SOUND_RIGHT_GAIN:
            result = (value - 2) * 15;
            break;

        case SOUND_MIC_GAIN:
            result = value * 15 + 210;
            break;

       default:
            result = value;
            break;
    }
    return result;
#elif defined(HAVE_UDA1380)
    int result = 0;
    
    switch(setting)
    {
        case SOUND_LEFT_GAIN:
        case SOUND_RIGHT_GAIN:
        case SOUND_MIC_GAIN:
            result = value * 5;         /* (1/2) * 10 */
            break;

        default:
            result = value;
            break;
    }
    return result;
#elif defined(HAVE_TLV320) || defined(HAVE_WM8731)
    int result = 0;
    
    switch(setting)
    {
#ifdef HAVE_RECORDING
        case SOUND_LEFT_GAIN:
        case SOUND_RIGHT_GAIN:
            result = (value - 23) * 15;    /* (x - 23)/1.5 *10 */
            break;

        case SOUND_MIC_GAIN:
            result = value * 200;          /* 0 or 20 dB */
            break;
#endif
       default:
            result = value;
            break;
    }
    return result;
#elif defined(HAVE_AS3514)
    /* This is here for the sim only and the audio driver has its own */
    int result;

    switch(setting)
    {
    case SOUND_LEFT_GAIN:
    case SOUND_RIGHT_GAIN:
    case SOUND_MIC_GAIN:
        result = (value - 23) * 15;
        break;

    default:
        result = value;
        break;
    }

    return result;
#else
    (void)setting;
    return value;
#endif
}
#endif /* !defined(HAVE_AS3514) || defined(SIMULATOR) */

#if (CONFIG_CODEC == MAS3587F) || (CONFIG_CODEC == MAS3539F)
#ifndef SIMULATOR
/* This function works by telling the decoder that we have another
   crystal frequency than we actually have. It will adjust its internal
   parameters and the result is that the audio is played at another pitch.

   The pitch value is in tenths of percent.
*/
static int last_pitch = 1000;

void sound_set_pitch(int pitch)
{
    unsigned long val;

    if (pitch != last_pitch)
    {
        /* Calculate the new (bogus) frequency */
        val = 18432 * 1000 / pitch;

        mas_writemem(MAS_BANK_D0, MAS_D0_OFREQ_CONTROL, &val, 1);

        /* We must tell the MAS that the frequency has changed.
         * This will unfortunately cause a short silence. */
        mas_writemem(MAS_BANK_D0, MAS_D0_IO_CONTROL_MAIN, &shadow_io_control_main, 1);

        last_pitch = pitch;
    }
}

int sound_get_pitch(void)
{
    return last_pitch;
}
#else /* SIMULATOR */
void sound_set_pitch(int pitch)
{
    (void)pitch;
}

int sound_get_pitch(void)
{
    return 1000;
}
#endif /* SIMULATOR */
#endif /* (CONFIG_CODEC == MAS3587F) || (CONFIG_CODEC == MAS3539F) */