2eda5385d3
git-svn-id: svn://svn.rockbox.org/rockbox/trunk@2485 a1c6a512-1295-4272-9138-f99709370657
295 lines
8.8 KiB
C
295 lines
8.8 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) 2002 by Philipp Pertermann
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*
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* All files in this archive are subject to the GNU General Public License.
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* See the file COPYING in the source tree root for full license agreement.
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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 "mas.h"
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#include "thread.h"
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#include "kernel.h"
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#include "settings.h"
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#include "lcd.h"
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#include "wps-display.h"
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#include "sprintf.h"
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#include "button.h"
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#include "system.h"
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#include "font.h"
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#include "icons.h"
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#include "lang.h"
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#include "peakmeter.h"
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/* buffer the read peak value */
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static int peak_meter_max_l;
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static int peak_meter_max_r;
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/* point in time when peak_meter_max_x becomes invalid */
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static long peak_meter_timeout_l;
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static long peak_meter_timeout_r;
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/* when true a clip has occurred */
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static bool peak_meter_l_clip = false;
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static bool peak_meter_r_clip = false;
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/* point in time when peak_meter_x_oveflow becomes invalid */
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static long peak_meter_clip_timeout_l;
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static long peak_meter_clip_timeout_r;
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/* if set to true clip timeout is disabled */
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static bool peak_meter_clip_eternal = false;
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#ifndef SIMULATOR
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static int peak_meter_src_l = MAS_REG_DQPEAK_L;
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static int peak_meter_src_r = MAS_REG_DQPEAK_R;
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#endif
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/* temporarily en- / disables peak meter. This is
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especially for external applications to detect
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if the peak_meter is in use and needs drawing at all */
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bool peak_meter_enabled = true;
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static int peak_meter_l;
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static int peak_meter_r;
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/* time out values for max */
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static long max_time_out[] = {
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0 * HZ, HZ / 5, 30, HZ / 2, HZ, 2 * HZ,
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3 * HZ, 4 * HZ, 5 * HZ, 6 * HZ, 7 * HZ, 8 * HZ,
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9 * HZ, 10 * HZ, 15 * HZ, 20 * HZ, 30 * HZ, 60 * HZ
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};
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/* time out values for clip */
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static long clip_time_out[] = {
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0 * HZ, 1 * HZ, 2 * HZ, 3 * HZ, 4 * HZ, 5 * HZ,
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6 * HZ, 7 * HZ, 8 * HZ, 9 * HZ, 10 * HZ, 15 * HZ,
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20 * HZ, 25 * HZ, 30 * HZ, 45 * HZ, 60 * HZ, 90 * HZ,
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120 * HZ, 180 * HZ, 300 * HZ, 600 * HZ, 1200 * HZ,
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2700 * HZ, 5400 * HZ
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};
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/**
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* Set the source of the peak meter to playback or to
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* record.
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* @param: bool playback - If true playback peak meter is used.
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* If false recording peak meter is used.
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*/
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void peak_meter_playback(bool playback) {
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#ifdef SIMULATOR
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(void)playback;
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#else
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if (playback) {
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peak_meter_src_l = MAS_REG_DQPEAK_L;
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peak_meter_src_r = MAS_REG_DQPEAK_R;
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} else {
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peak_meter_src_l = MAS_REG_QPEAK_L;
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peak_meter_src_r = MAS_REG_QPEAK_R;
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}
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#endif
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}
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/**
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* Reads peak values from the MAS, and detects clips. The
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* values are stored in peak_meter_l peak_meter_r for later
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* evauluation. Consecutive calls to peak_meter_peek detect
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* that ocurred. This function could be used by a thread for
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* busy reading the MAS.
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*/
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void peak_meter_peek(void) {
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#ifdef SIMULATOR
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int left = 8000;
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int right = 9000;
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#else
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/* read the peak values */
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int left = mas_codec_readreg(peak_meter_src_l);
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int right = mas_codec_readreg(peak_meter_src_r);
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#endif
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/* check for clips
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An clip is assumed when two consecutive readouts
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of the volume are at full scale. This is proven
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to be inaccurate in both ways: it may detect clips
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when no clip occurred and it may fail to detect
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a real clip. */
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if ((left == peak_meter_l) &&
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(left == MAX_PEAK - 1)) {
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peak_meter_l_clip = true;
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peak_meter_clip_timeout_l =
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current_tick + clip_time_out[global_settings.peak_meter_clip_hold];
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}
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if ((right == peak_meter_r) &&
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(right == MAX_PEAK - 1)) {
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peak_meter_r_clip = true;
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peak_meter_clip_timeout_r =
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current_tick + clip_time_out[global_settings.peak_meter_clip_hold];
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}
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/* peaks are searched -> we have to find the maximum */
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peak_meter_l = MAX(peak_meter_l, left);
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peak_meter_r = MAX(peak_meter_r, right);
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}
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/**
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* Reads out the peak volume of the left channel.
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* @return int - The maximum value that has been detected
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* since the last call of peak_meter_read_l. The value
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* is in the range 0 <= value < MAX_PEAK.
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*/
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static int peak_meter_read_l (void) {
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int retval = peak_meter_l;
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#ifdef SIMULATOR
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peak_meter_l = 8000;
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#else
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peak_meter_l = mas_codec_readreg(peak_meter_src_l);
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#endif
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return retval;
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}
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/**
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* Reads out the peak volume of the right channel.
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* @return int - The maximum value that has been detected
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* since the last call of peak_meter_read_l. The value
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* is in the range 0 <= value < MAX_PEAK.
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*/
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static int peak_meter_read_r (void) {
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int retval = peak_meter_r;
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#ifdef SIMULATOR
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peak_meter_l = 8000;
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#else
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peak_meter_r = mas_codec_readreg(peak_meter_src_r);
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#endif
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return retval;
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}
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/**
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* Reset the detected clips. This method is for
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* use by the user interface.
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* @param int unused - This parameter was added to
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* make the function compatible with set_int
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*/
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void peak_meter_set_clip_hold(int time) {
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peak_meter_clip_eternal = false;
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if (time <= 0) {
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peak_meter_l_clip = false;
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peak_meter_r_clip = false;
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peak_meter_clip_eternal = true;
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}
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}
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/**
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* Draws a peak meter in the specified size at the specified position.
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* @param int x - The x coordinate.
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* Make sure that 0 <= x and x + width < LCD_WIDTH
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* @param int y - The y coordinate.
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* Make sure that 0 <= y and y + height < LCD_HEIGHT
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* @param int width - The width of the peak meter. Note that for display
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* of clips a 3 pixel wide area is used ->
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* width > 3
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* @param int height - The height of the peak meter. height > 3
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*/
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void peak_meter_draw(int x, int y, int width, int height) {
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int left = 0, right = 0;
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static int last_left = 0, last_right = 0;
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int meterwidth = width - 3;
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int i;
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/* if disabled only draw the peak meter */
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if (peak_meter_enabled) {
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/* read the volume info from MAS */
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left = peak_meter_read_l();
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right = peak_meter_read_r();
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peak_meter_peek();
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/* scale the samples */
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left /= (MAX_PEAK / meterwidth);
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right /= (MAX_PEAK / meterwidth);
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/* apply release */
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left = MAX(left , last_left - global_settings.peak_meter_release);
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right = MAX(right, last_right - global_settings.peak_meter_release);
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/* reset max values after timeout */
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if (TIME_AFTER(current_tick, peak_meter_timeout_l)){
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peak_meter_max_l = 0;
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}
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if (TIME_AFTER(current_tick, peak_meter_timeout_r)){
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peak_meter_max_r = 0;
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}
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if (!peak_meter_clip_eternal) {
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if (peak_meter_l_clip &&
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TIME_AFTER(current_tick, peak_meter_clip_timeout_l)){
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peak_meter_l_clip = false;
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}
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if (peak_meter_r_clip &&
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TIME_AFTER(current_tick, peak_meter_clip_timeout_r)){
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peak_meter_r_clip = false;
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}
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}
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/* check for new max values */
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if (left > peak_meter_max_l) {
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peak_meter_max_l = left - 1;
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peak_meter_timeout_l =
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current_tick + max_time_out[global_settings.peak_meter_hold];
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}
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if (right > peak_meter_max_r) {
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peak_meter_max_r = right - 1;
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peak_meter_timeout_r =
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current_tick + max_time_out[global_settings.peak_meter_hold];
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}
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}
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/* draw the peak meter */
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lcd_clearrect(x, y, width, height);
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/* draw left */
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lcd_fillrect (x, y, left, height / 2 - 2 );
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if (peak_meter_max_l > 0) {
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lcd_drawline(x + peak_meter_max_l, y,
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x + peak_meter_max_l, y + height / 2 - 2 );
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}
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if (peak_meter_l_clip) {
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lcd_fillrect(x + meterwidth, y, 3, height / 2 - 1);
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}
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/* draw right */
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lcd_fillrect(x, y + height / 2 + 1, right, height / 2 - 2);
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if (peak_meter_max_r > 0) {
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lcd_drawline( x + peak_meter_max_r, y + height / 2,
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x + peak_meter_max_r, y + height - 2);
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}
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if (peak_meter_r_clip) {
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lcd_fillrect(x + meterwidth, y + height / 2, 3, height / 2 - 1);
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}
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/* draw scale */
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lcd_drawline(x + meterwidth, y,
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x + meterwidth, y + height - 2);
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for (i = 0; i < 10; i++) {
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lcd_invertpixel(x + meterwidth * i / 10, y + height / 2 - 1);
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}
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last_left = left;
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last_right = right;
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}
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