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-rw-r--r--apps/menus/sound_menu.c15
-rw-r--r--apps/settings.c7
-rw-r--r--apps/settings.h13
-rw-r--r--apps/settings_list.c15
-rw-r--r--lib/rbcodec/dsp/compressor.c368
-rw-r--r--lib/rbcodec/dsp/compressor.h2
-rw-r--r--lib/rbcodec/dsp/dsp.c4
-rw-r--r--lib/rbcodec/dsp/dsp.h3
8 files changed, 216 insertions, 211 deletions
diff --git a/apps/menus/sound_menu.c b/apps/menus/sound_menu.c
index e93d73b7ed..0817304f8d 100644
--- a/apps/menus/sound_menu.c
+++ b/apps/menus/sound_menu.c
@@ -126,15 +126,20 @@ static int timestretch_callback(int action,const struct menu_item_ex *this_item)
/* compressor submenu */
MENUITEM_SETTING(compressor_threshold,
- &global_settings.compressor_threshold, lowlatency_callback);
+ &global_settings.compressor_settings.threshold,
+ lowlatency_callback);
MENUITEM_SETTING(compressor_gain,
- &global_settings.compressor_makeup_gain, lowlatency_callback);
+ &global_settings.compressor_settings.makeup_gain,
+ lowlatency_callback);
MENUITEM_SETTING(compressor_ratio,
- &global_settings.compressor_ratio, lowlatency_callback);
+ &global_settings.compressor_settings.ratio,
+ lowlatency_callback);
MENUITEM_SETTING(compressor_knee,
- &global_settings.compressor_knee, lowlatency_callback);
+ &global_settings.compressor_settings.knee,
+ lowlatency_callback);
MENUITEM_SETTING(compressor_release,
- &global_settings.compressor_release_time, lowlatency_callback);
+ &global_settings.compressor_settings.release_time,
+ lowlatency_callback);
MAKE_MENU(compressor_menu,ID2P(LANG_COMPRESSOR), NULL, Icon_NOICON,
&compressor_threshold, &compressor_gain, &compressor_ratio,
&compressor_knee, &compressor_release);
diff --git a/apps/settings.c b/apps/settings.c
index 13913f2d85..a267f51765 100644
--- a/apps/settings.c
+++ b/apps/settings.c
@@ -781,9 +781,6 @@ void settings_apply(bool read_disk)
#ifdef HAVE_LCD_BITMAP
int rc;
#endif
-#if CONFIG_CODEC == SWCODEC
- int i;
-#endif
sound_settings_apply();
#ifdef HAVE_DISK_STORAGE
@@ -991,7 +988,7 @@ void settings_apply(bool read_disk)
/* Configure software equalizer, hardware eq is handled in audio_init() */
dsp_set_eq(global_settings.eq_enabled);
dsp_set_eq_precut(global_settings.eq_precut);
- for(i = 0; i < 5; i++) {
+ for(int i = 0; i < 5; i++) {
dsp_set_eq_coefs(i);
}
@@ -999,7 +996,7 @@ void settings_apply(bool read_disk)
#ifdef HAVE_PITCHSCREEN
dsp_timestretch_enable(global_settings.timestretch_enabled);
#endif
- dsp_set_compressor();
+ dsp_set_compressor(&global_settings.compressor_settings);
#endif
#ifdef HAVE_SPDIF_POWER
diff --git a/apps/settings.h b/apps/settings.h
index fb562c9191..b312c1e784 100644
--- a/apps/settings.h
+++ b/apps/settings.h
@@ -772,11 +772,14 @@ struct user_settings
#endif
#if CONFIG_CODEC == SWCODEC
- int compressor_threshold;
- int compressor_makeup_gain;
- int compressor_ratio;
- int compressor_knee;
- int compressor_release_time;
+ struct compressor_settings
+ {
+ int threshold;
+ int makeup_gain;
+ int ratio;
+ int knee;
+ int release_time;
+ } compressor_settings;
#endif
int sleeptimer_duration; /* In minutes; 0=off */
diff --git a/apps/settings_list.c b/apps/settings_list.c
index 6780c78ed3..af48d11c85 100644
--- a/apps/settings_list.c
+++ b/apps/settings_list.c
@@ -436,7 +436,7 @@ static void crossfeed_cross_set(int val)
static void compressor_set(int val)
{
(void)val;
- dsp_set_compressor();
+ dsp_set_compressor(&global_settings.compressor_settings);
}
static const char* db_format(char* buffer, size_t buffer_size, int value,
@@ -1482,25 +1482,26 @@ const struct settings_list settings[] = {
#endif
/* compressor */
- INT_SETTING_NOWRAP(F_SOUNDSETTING, compressor_threshold,
+ INT_SETTING_NOWRAP(F_SOUNDSETTING, compressor_settings.threshold,
LANG_COMPRESSOR_THRESHOLD, 0,
"compressor threshold", UNIT_DB, 0, -24,
- -3, formatter_unit_0_is_off, getlang_unit_0_is_off, compressor_set),
- CHOICE_SETTING(F_SOUNDSETTING|F_NO_WRAP, compressor_makeup_gain,
+ -3, formatter_unit_0_is_off, getlang_unit_0_is_off,
+ compressor_set),
+ CHOICE_SETTING(F_SOUNDSETTING|F_NO_WRAP, compressor_settings.makeup_gain,
LANG_COMPRESSOR_GAIN, 1, "compressor makeup gain",
"off,auto", compressor_set, 2,
ID2P(LANG_OFF), ID2P(LANG_AUTO)),
- CHOICE_SETTING(F_SOUNDSETTING|F_NO_WRAP, compressor_ratio,
+ CHOICE_SETTING(F_SOUNDSETTING|F_NO_WRAP, compressor_settings.ratio,
LANG_COMPRESSOR_RATIO, 1, "compressor ratio",
"2:1,4:1,6:1,10:1,limit", compressor_set, 5,
ID2P(LANG_COMPRESSOR_RATIO_2), ID2P(LANG_COMPRESSOR_RATIO_4),
ID2P(LANG_COMPRESSOR_RATIO_6), ID2P(LANG_COMPRESSOR_RATIO_10),
ID2P(LANG_COMPRESSOR_RATIO_LIMIT)),
- CHOICE_SETTING(F_SOUNDSETTING|F_NO_WRAP, compressor_knee,
+ CHOICE_SETTING(F_SOUNDSETTING|F_NO_WRAP, compressor_settings.knee,
LANG_COMPRESSOR_KNEE, 1, "compressor knee",
"hard knee,soft knee", compressor_set, 2,
ID2P(LANG_COMPRESSOR_HARD_KNEE), ID2P(LANG_COMPRESSOR_SOFT_KNEE)),
- INT_SETTING_NOWRAP(F_SOUNDSETTING, compressor_release_time,
+ INT_SETTING_NOWRAP(F_SOUNDSETTING, compressor_settings.release_time,
LANG_COMPRESSOR_RELEASE, 500,
"compressor release time", UNIT_MS, 100, 1000,
100, NULL, NULL, compressor_set),
diff --git a/lib/rbcodec/dsp/compressor.c b/lib/rbcodec/dsp/compressor.c
index 3a8d52e4da..a6c1ac1018 100644
--- a/lib/rbcodec/dsp/compressor.c
+++ b/lib/rbcodec/dsp/compressor.c
@@ -29,6 +29,8 @@
/*#define LOGF_ENABLE*/
#include "logf.h"
+static struct compressor_settings curr_set; /* Cached settings */
+
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 */
@@ -38,214 +40,210 @@ static int32_t release_gain IBSS_ATTR; /* S7.24 format */
/** COMPRESSOR UPDATE
* Called via the menu system to configure the compressor process */
-bool compressor_update(void)
+bool compressor_update(const struct compressor_settings *settings)
{
- 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;
+ /* make settings values useful */
+ int threshold = settings->threshold;
+ bool auto_gain = settings->makeup_gain == 1;
+ static const int comp_ratios[] = { 2, 4, 6, 10, 0 };
+ int ratio = comp_ratios[settings->ratio];
+ bool soft_knee = settings->knee == 1;
+ int release = settings->release_time * NATIVE_FREQUENCY / 1000;
bool changed = false;
- bool active = (threshold < 0);
+ bool active = threshold < 0;
- for (int i = 0; i < 5; i++)
+ if (memcmp(settings, &curr_set, sizeof (curr_set)))
{
- if (curr_set[i] != new_set[i])
- {
- changed = true;
- curr_set[i] = new_set[i];
+ /* Compressor settings have changed since last call */
+ changed = true;
#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 (settings->threshold != curr_set.threshold)
+ {
+ logf(" Compressor Threshold: %d dB\tEnabled: %s",
+ threshold, active ? "Yes" : "No");
}
- }
- 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
+ if (settings->makeup_gain != curr_set.makeup_gain)
{
- 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)
+ logf(" Compressor Makeup Gain: %s",
+ auto_gain ? "Auto" : "Off");
+ }
+
+ if (settings->ratio != cur_set.ratio)
{
- /* 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);
+ { logf(" Compressor Ratio: %d:1", ratio); }
else
- /* offset = -3db for hard limit */
- db_curve[2].offset = (-3 << 16);
+ { logf(" Compressor Ratio: Limit"); }
}
- else
+
+ if (settings->knee != cur_set.knee)
{
- /* 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;
+ logf(" Compressor Knee: %s", soft_knee?"Soft":"Hard");
}
-
- /* Calculate 0db and ~+12db offsets */
- db_curve[4].db = 0xC0A8C; /* db of 2 bits clipping */
- if (ratio)
+
+ if (settings->release_time != cur_set.release_time)
{
- /* 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;
+ logf(" Compressor Release: %d", release);
}
+#endif
+
+ curr_set = *settings;
+ }
+
+ if (!changed || !active)
+ return 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 = 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;
-
+ /* 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);
+ 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;
- /* 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;
+ 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;
}
diff --git a/lib/rbcodec/dsp/compressor.h b/lib/rbcodec/dsp/compressor.h
index 6154372e05..d0e33f6e2c 100644
--- a/lib/rbcodec/dsp/compressor.h
+++ b/lib/rbcodec/dsp/compressor.h
@@ -23,7 +23,7 @@
#define COMPRESSOR_H
void compressor_process(int count, struct dsp_data *data, int32_t *buf[]);
-bool compressor_update(void);
+bool compressor_update(const struct compressor_settings *settings);
void compressor_reset(void);
#endif /* COMPRESSOR_H */
diff --git a/lib/rbcodec/dsp/dsp.c b/lib/rbcodec/dsp/dsp.c
index 4da555747b..4061fa7186 100644
--- a/lib/rbcodec/dsp/dsp.c
+++ b/lib/rbcodec/dsp/dsp.c
@@ -1565,9 +1565,9 @@ void dsp_set_replaygain(void)
/** SET COMPRESSOR
* Called by the menu system to configure the compressor process */
-void dsp_set_compressor(void)
+void dsp_set_compressor(const struct compressor_settings *settings)
{
/* enable/disable the compressor */
- AUDIO_DSP.compressor_process = compressor_update() ?
+ AUDIO_DSP.compressor_process = compressor_update(settings) ?
compressor_process : NULL;
}
diff --git a/lib/rbcodec/dsp/dsp.h b/lib/rbcodec/dsp/dsp.h
index 2a00f649f8..0da62747a3 100644
--- a/lib/rbcodec/dsp/dsp.h
+++ b/lib/rbcodec/dsp/dsp.h
@@ -120,6 +120,7 @@ int32_t sound_get_pitch(void);
void dsp_set_timestretch(int32_t percent);
int32_t dsp_get_timestretch(void);
int dsp_callback(int msg, intptr_t param);
-void dsp_set_compressor(void);
+struct compressor_settings;
+void dsp_set_compressor(const struct compressor_settings *settings);
#endif