b5a6517e9d
Replace with rbcodecconfig.h and platform.h includes. Remove now- unneeded ones as well. Change-Id: I6111b71e90bf86d9fe272a7916f2d34a5c6dd724
145 lines
4.1 KiB
C
145 lines
4.1 KiB
C
/***************************************************************************
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* __________ __ ___.
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* Open \______ \ ____ ____ | | _\_ |__ _______ ___
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* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
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* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
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* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
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* \/ \/ \/ \/ \/
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* $Id$
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*
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* Copyright (C) 2005 Magnus Holmgren
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* Copyright (C) 2012 Michael Sevakis
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
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* KIND, either express or implied.
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*
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****************************************************************************/
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#include "rbcodecconfig.h"
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#include "platform.h"
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#include "dsp-util.h"
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#include "fixedpoint.h"
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#include "fracmul.h"
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#include "dsp_proc_entry.h"
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#include "pga.h"
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/* Implemented here or in target assembly code */
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void pga_process(struct dsp_proc_entry *this, struct dsp_buffer **buf_p);
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#define DEFAULT_PGA_GAIN (PGA_UNITY >> 1) /* s8.23 format */
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static struct pga_data
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{
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int32_t gain; /* 00h: Final gain in s8.23 format */
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uint32_t enabled; /* Mask of enabled gains */
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int32_t gains[PGA_NUM_GAINS]; /* Individual gains in s7.24 format */
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} pga_data =
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{
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.gain = DEFAULT_PGA_GAIN,
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.enabled = 0,
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.gains[0 ... PGA_NUM_GAINS-1] = PGA_UNITY,
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};
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/* Combine all gains to a global gain and enable/disable the amplifier if
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the overall gain is not unity/unity */
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static void pga_update(void)
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{
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int32_t gain = PGA_UNITY;
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/* Multiply all gains with one another to get overall amp gain */
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for (int i = 0; i < PGA_NUM_GAINS; i++)
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{
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if (pga_data.enabled & BIT_N(i)) /* Only enabled gains factor in */
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gain = fp_mul(gain, pga_data.gains[i], 24);
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}
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gain >>= 1; /* s7.24 -> s8.23 format */
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if (gain == pga_data.gain)
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return;
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struct dsp_config *dsp = dsp_get_config(CODEC_IDX_AUDIO);
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pga_data.gain = gain;
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dsp_proc_enable(dsp, DSP_PROC_PGA, gain != DEFAULT_PGA_GAIN);
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dsp_proc_activate(dsp, DSP_PROC_PGA, true);
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}
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/** Amp controls **/
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/* Set a particular gain value - doesn't have to be enabled */
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void pga_set_gain(enum pga_gain_ids id, int32_t value)
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{
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if (value == pga_data.gains[id])
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return;
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pga_data.gains[id] = value;
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if (BIT_N(id) & pga_data.enabled)
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pga_update();
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}
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/* Enable or disable the specified gain stage */
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void pga_enable_gain(enum pga_gain_ids id, bool enable)
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{
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uint32_t bit = BIT_N(id);
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if (enable != !(pga_data.enabled & bit))
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return;
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pga_data.enabled ^= bit;
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pga_update();
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}
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/** DSP interface **/
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#if !defined(CPU_COLDFIRE) && !defined(CPU_ARM)
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/* Apply a constant gain to the samples (e.g., for ReplayGain). */
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void pga_process(struct dsp_proc_entry *this, struct dsp_buffer **buf_p)
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{
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int32_t gain = ((struct pga_data *)this->data)->gain;
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struct dsp_buffer *buf = *buf_p;
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unsigned int channels = buf->format.num_channels;
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for (unsigned int ch = 0; ch < channels; ch++)
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{
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int32_t *d = buf->p32[ch];
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int count = buf->remcount;
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for (int i = 0; i < count; i++)
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d[i] = FRACMUL_SHL(d[i], gain, 8);
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}
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(void)this;
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}
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#endif /* CPU */
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/* DSP message hook */
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static intptr_t pga_configure(struct dsp_proc_entry *this,
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struct dsp_config *dsp,
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unsigned int setting,
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intptr_t value)
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{
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switch (setting)
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{
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case DSP_PROC_INIT:
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if (value != 0)
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break; /* Already enabled */
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this->data = (intptr_t)&pga_data;
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this->process = pga_process;
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break;
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}
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return 0;
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(void)dsp;
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}
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/* Database entry */
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DSP_PROC_DB_ENTRY(PGA,
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pga_configure);
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