Build librbcodec with DSP and metadata.

All associated files are moved to /lib/rbcodec.

Change-Id: I572ddd2b8a996aae1e98c081d06b1ed356dce222

1 files changed, 0 insertions, 363 deletions

diff --git a/apps/compressor.c b/apps/compressor.c
deleted file mode 100644
index 3a8d52e..0000000
--- a/apps/compressor.c
+++ /dev/null
@@ -1,363 +0,0 @@
-/***************************************************************************
- *             __________               __   ___.
- *   Open      \______   \ ____   ____ |  | _\_ |__   _______  ___
- *   Source     |       _//  _ \_/ ___\|  |/ /| __ \ /  _ \  \/  /
- *   Jukebox    |    |   (  <_> )  \___|    < | \_\ (  <_> > <  <
- *   Firmware   |____|_  /\____/ \___  >__|_ \|___  /\____/__/\_ \
- *                     \/            \/     \/    \/            \/
- * $Id$
- *
- * Copyright (C) 2009 Jeffrey Goode
- *
- * 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 "fixedpoint.h"
-#include "fracmul.h"
-#include "settings.h"
-#include "dsp.h"
-#include "compressor.h"
-
-/* Define LOGF_ENABLE to enable logf output in this file */
-/*#define LOGF_ENABLE*/
-#include "logf.h"
-
-static int32_t comp_rel_slope IBSS_ATTR;   /* S7.24 format */
-static int32_t comp_makeup_gain IBSS_ATTR; /* S7.24 format */
-static int32_t comp_curve[66] IBSS_ATTR;   /* S7.24 format */
-static int32_t release_gain IBSS_ATTR;     /* S7.24 format */
-
-#define UNITY (1L << 24)                   /* unity gain in S7.24 format */
-
-/** COMPRESSOR UPDATE
- *  Called via the menu system to configure the compressor process */
-bool compressor_update(void)
-{
-    static int curr_set[5];
-    int new_set[5] = {
-        global_settings.compressor_threshold,
-        global_settings.compressor_makeup_gain,
-        global_settings.compressor_ratio,
-        global_settings.compressor_knee,
-        global_settings.compressor_release_time};
-    
-    /* make menu values useful */
-    int  threshold  =  new_set[0];
-    bool auto_gain  = (new_set[1] == 1);
-    const int comp_ratios[] = {2, 4, 6, 10, 0};
-    int  ratio      =  comp_ratios[new_set[2]];
-    bool soft_knee  = (new_set[3] == 1);
-    int  release    =  new_set[4] * NATIVE_FREQUENCY / 1000;
-
-    bool changed = false;
-    bool active  = (threshold < 0);
-
-    for (int i = 0; i < 5; i++)
-    {
-        if (curr_set[i] != new_set[i])
-        {
-            changed = true;
-            curr_set[i] = new_set[i];
-            
-#if defined(ROCKBOX_HAS_LOGF) && defined(LOGF_ENABLE)
-            switch (i)
-            {
-            case 0:
-                logf("   Compressor Threshold: %d dB\tEnabled: %s",
-                    threshold, active ? "Yes" : "No");
-                break;
-            case 1:
-                logf("   Compressor Makeup Gain: %s",
-                    auto_gain ? "Auto" : "Off");
-                break;
-            case 2:
-                if (ratio)
-                    { logf("   Compressor Ratio: %d:1", ratio); }
-                else
-                    { logf("   Compressor Ratio: Limit"); }
-                break;
-            case 3:
-                logf("   Compressor Knee: %s", soft_knee?"Soft":"Hard");
-                break;
-            case 4:
-                logf("   Compressor Release: %d", release);
-                break;
-            }
-#endif
-        }
-    }
-
-    if (changed && active)
-    {
-        /* configure variables for compressor operation */
-        static const int32_t db[] = {
-            /* positive db equivalents in S15.16 format */
-            0x000000, 0x241FA4, 0x1E1A5E, 0x1A94C8,
-            0x181518, 0x1624EA, 0x148F82, 0x1338BD,
-            0x120FD2, 0x1109EB, 0x101FA4, 0x0F4BB6,
-            0x0E8A3C, 0x0DD840, 0x0D3377, 0x0C9A0E,
-            0x0C0A8C, 0x0B83BE, 0x0B04A5, 0x0A8C6C,
-            0x0A1A5E, 0x09ADE1, 0x094670, 0x08E398,
-            0x0884F6, 0x082A30, 0x07D2FA, 0x077F0F,
-            0x072E31, 0x06E02A, 0x0694C8, 0x064BDF,
-            0x060546, 0x05C0DA, 0x057E78, 0x053E03,
-            0x04FF5F, 0x04C273, 0x048726, 0x044D64,
-            0x041518, 0x03DE30, 0x03A89B, 0x037448,
-            0x03412A, 0x030F32, 0x02DE52, 0x02AE80,
-            0x027FB0, 0x0251D6, 0x0224EA, 0x01F8E2,
-            0x01CDB4, 0x01A359, 0x0179C9, 0x0150FC,
-            0x0128EB, 0x010190, 0x00DAE4, 0x00B4E1,
-            0x008F82, 0x006AC1, 0x004699, 0x002305};
-        
-        struct curve_point
-        {
-            int32_t db;     /* S15.16 format */
-            int32_t offset; /* S15.16 format */
-        } db_curve[5];
-        
-        /** Set up the shape of the compression curve first as decibel
-            values */
-        /* db_curve[0] = bottom of knee
-                   [1] = threshold
-                   [2] = top of knee
-                   [3] = 0 db input
-                   [4] = ~+12db input (2 bits clipping overhead) */
-        
-        db_curve[1].db = threshold << 16;
-        if (soft_knee)
-        {
-            /* bottom of knee is 3dB below the threshold for soft knee*/
-            db_curve[0].db = db_curve[1].db - (3 << 16);
-            /* top of knee is 3dB above the threshold for soft knee */
-            db_curve[2].db = db_curve[1].db + (3 << 16);
-            if (ratio)
-                /* offset = -3db * (ratio - 1) / ratio */
-                db_curve[2].offset = (int32_t)((long long)(-3 << 16)
-                    * (ratio - 1) / ratio);
-            else
-                /* offset = -3db for hard limit */
-                db_curve[2].offset = (-3 << 16);
-        }
-        else
-        {
-            /* bottom of knee is at the threshold for hard knee */
-            db_curve[0].db = threshold << 16;
-            /* top of knee is at the threshold for hard knee */
-            db_curve[2].db = threshold << 16;
-            db_curve[2].offset = 0;
-        }
-        
-        /* Calculate 0db and ~+12db offsets */
-        db_curve[4].db = 0xC0A8C; /* db of 2 bits clipping */
-        if (ratio)
-        {
-            /* offset = threshold * (ratio - 1) / ratio */
-            db_curve[3].offset = (int32_t)((long long)(threshold << 16)
-                * (ratio - 1) / ratio);
-            db_curve[4].offset = (int32_t)((long long)-db_curve[4].db
-                * (ratio - 1) / ratio) + db_curve[3].offset;
-        }
-        else
-        {
-            /* offset = threshold for hard limit */
-            db_curve[3].offset = (threshold << 16);
-            db_curve[4].offset = -db_curve[4].db + db_curve[3].offset;
-        }
-        
-        /** Now set up the comp_curve table with compression offsets in the
-            form of gain factors in S7.24 format */
-        /* comp_curve[0] is 0 (-infinity db) input */
-        comp_curve[0] = UNITY;
-        /* comp_curve[1 to 63] are intermediate compression values 
-           corresponding to the 6 MSB of the input values of a non-clipped
-           signal */
-        for (int i = 1; i < 64; i++)
-        {
-            /* db constants are stored as positive numbers;
-               make them negative here */
-            int32_t this_db = -db[i];
-            
-            /* no compression below the knee */
-            if (this_db <= db_curve[0].db)
-                comp_curve[i] = UNITY;
-            
-            /* if soft knee and below top of knee,
-               interpolate along soft knee slope */
-            else if (soft_knee && (this_db <= db_curve[2].db))
-                comp_curve[i] = fp_factor(fp_mul(
-                    ((this_db - db_curve[0].db) / 6),
-                    db_curve[2].offset, 16), 16) << 8;
-            
-            /* interpolate along ratio slope above the knee */
-            else
-                comp_curve[i] = fp_factor(fp_mul(
-                    fp_div((db_curve[1].db - this_db), db_curve[1].db, 16),
-                    db_curve[3].offset, 16), 16) << 8;
-        }
-        /* comp_curve[64] is the compression level of a maximum level,
-           non-clipped signal */
-        comp_curve[64] = fp_factor(db_curve[3].offset, 16) << 8;
-        
-        /* comp_curve[65] is the compression level of a maximum level,
-           clipped signal */
-        comp_curve[65] = fp_factor(db_curve[4].offset, 16) << 8;
-        
-#if defined(ROCKBOX_HAS_LOGF) && defined(LOGF_ENABLE)
-        logf("\n   *** Compression Offsets ***");
-        /* some settings for display only, not used in calculations */
-        db_curve[0].offset = 0;
-        db_curve[1].offset = 0;
-        db_curve[3].db = 0;
-        
-        for (int i = 0; i <= 4; i++)
-        {
-            logf("Curve[%d]: db: % 6.2f\toffset: % 6.2f", i,
-                (float)db_curve[i].db / (1 << 16),
-                (float)db_curve[i].offset / (1 << 16));
-        }
-        
-        logf("\nGain factors:");
-        for (int i = 1; i <= 65; i++)
-        {
-            debugf("%02d: %.6f  ", i, (float)comp_curve[i] / UNITY);
-            if (i % 4 == 0) debugf("\n");
-        }
-        debugf("\n");
-#endif
-        
-        /* if using auto peak, then makeup gain is max offset -
-           .1dB headroom */
-        comp_makeup_gain = auto_gain ?
-            fp_factor(-(db_curve[3].offset) - 0x199A, 16) << 8 : UNITY;
-        logf("Makeup gain:\t%.6f", (float)comp_makeup_gain / UNITY);
-
-        /* calculate per-sample gain change a rate of 10db over release time
-         */
-        comp_rel_slope = 0xAF0BB2 / release;
-        logf("Release slope:\t%.6f", (float)comp_rel_slope / UNITY);
-        
-        release_gain = UNITY;
-    }
-
-    return active;
-}
-
-/** GET COMPRESSION GAIN
- *  Returns the required gain factor in S7.24 format in order to compress the
- *  sample in accordance with the compression curve.  Always 1 or less.
- */
-static inline int32_t get_compression_gain(struct dsp_data *data,
-                                           int32_t sample)
-{
-    const int frac_bits_offset = data->frac_bits - 15;
-    
-    /* sample must be positive */
-    if (sample < 0)
-        sample = -(sample + 1);
-        
-    /* shift sample into 15 frac bit range */
-    if (frac_bits_offset > 0)
-        sample >>= frac_bits_offset;
-    if (frac_bits_offset < 0)
-        sample <<= -frac_bits_offset;
-    
-    /* normal case: sample isn't clipped */
-    if (sample < (1 << 15))
-    {
-        /* index is 6 MSB, rem is 9 LSB */
-        int index = sample >> 9;
-        int32_t rem = (sample & 0x1FF) << 22;
-        
-        /* interpolate from the compression curve:
-            higher gain - ((rem / (1 << 31)) * (higher gain - lower gain)) */
-        return comp_curve[index] - (FRACMUL(rem,
-            (comp_curve[index] - comp_curve[index + 1])));
-    }
-    /* sample is somewhat clipped, up to 2 bits of overhead */
-    if (sample < (1 << 17))
-    {
-        /* straight interpolation:
-            higher gain - ((clipped portion of sample * 4/3
-            / (1 << 31)) * (higher gain - lower gain)) */
-        return comp_curve[64] - (FRACMUL(((sample - (1 << 15)) / 3) << 16,
-            (comp_curve[64] - comp_curve[65])));
-    }
-    
-    /* sample is too clipped, return invalid value */
-    return -1;
-}
-
-/** COMPRESSOR PROCESS
- *  Changes the gain of the samples according to the compressor curve
- */
-void compressor_process(int count, struct dsp_data *data, int32_t *buf[])
-{
-    const int num_chan = data->num_channels;
-    int32_t *in_buf[2] = {buf[0], buf[1]};
-    
-    while (count-- > 0)
-    {
-        int ch;
-        /* use lowest (most compressed) gain factor of the output buffer
-           sample pair for both samples (mono is also handled correctly here)
-         */
-        int32_t sample_gain = UNITY;
-        for (ch = 0; ch < num_chan; ch++)
-        {
-            int32_t this_gain = get_compression_gain(data, *in_buf[ch]);
-            if (this_gain < sample_gain)
-                sample_gain = this_gain;
-        }
-        
-        /* perform release slope; skip if no compression and no release slope
-         */
-        if ((sample_gain != UNITY) || (release_gain != UNITY))
-        {
-            /* if larger offset than previous slope, start new release slope
-             */
-            if ((sample_gain <= release_gain) && (sample_gain > 0))
-            {
-                release_gain = sample_gain;
-            }
-            else
-            /* keep sloping towards unity gain (and ignore invalid value) */
-            {
-                release_gain += comp_rel_slope;
-                if (release_gain > UNITY)
-                {
-                    release_gain = UNITY;
-                }
-            }
-        }
-        
-        /* total gain factor is the product of release gain and makeup gain,
-           but avoid computation if possible */
-        int32_t total_gain = ((release_gain == UNITY) ? comp_makeup_gain :
-            (comp_makeup_gain == UNITY) ? release_gain :
-                FRACMUL_SHL(release_gain, comp_makeup_gain, 7));
-        
-        /* Implement the compressor: apply total gain factor (if any) to the
-           output buffer sample pair/mono sample */
-        if (total_gain != UNITY)
-        {
-            for (ch = 0; ch < num_chan; ch++)
-            {
-                *in_buf[ch] = FRACMUL_SHL(total_gain, *in_buf[ch], 7);
-            }
-        }
-        in_buf[0]++;
-        in_buf[1]++;
-    }
-}
-
-void compressor_reset(void)
-{
-    release_gain = UNITY;
-}