PCM-1 manual offset, fixed STC-007 CWD, GUI fixes

Added manual vertical data offset control for PCM-1, fixed PCM-1 stray header line processing as audio, fixed STC-007 CWD, added display for STC-007 address code, moved VU-envelope generation into AudioProcessor to reduce GUI lagging, small AudioProcessor rework to support advanced interpolation modes in the future, visualizer optimizations, added new tooltips and translations.

SDVPCMdecoder.pro

@@ -4,7 +4,7 @@
 #
 #-------------------------------------------------
 
-QT       += core gui winextras
+QT       += core gui opengl winextras
 
 greaterThan(QT_MAJOR_VERSION, 4): QT += widgets multimedia concurrent
 
@@ -28,10 +28,10 @@ QMAKE_CFLAGS_RELEASE += -O3 -march=pentium3m
 
 QMAKE_CXXFLAGS+= -D__STDC_CONSTANT_MACROS -fpermissive
 
-VERSION = 0.99.5
+VERSION = 0.99.6
 win32: QMAKE_TARGET_COMPANY = Fagear
 win32: QMAKE_TARGET_PRODUCT = SD video PCM decoder
-win32: QMAKE_TARGET_DESCRIPTION = SD video to digital audio PCM decoder
+win32: QMAKE_TARGET_DESCRIPTION = SD video to digital audio decoder
 win32: QMAKE_TARGET_COPYRIGHT = (c) Fagear
 win32: RC_LANG = 0x0419
 

about_wnd.ui

@@ -58,7 +58,7 @@
       <bool>true</bool>
      </property>
      <property name="text">
-      <string>&lt;html&gt;&lt;head/&gt;&lt;body&gt;&lt;p&gt;+ &lt;span style=&quot; font-weight:600;&quot;&gt;PCM-1&lt;/span&gt; (2 канала, 13 бит, 44056 Гц, Sony Standard B, NTSC)&lt;br/&gt;+ &lt;span style=&quot; font-weight:600;&quot;&gt;PCM-1600&lt;/span&gt; (2 канала, 16 бит, 44056 Гц, Sony Standard A, NTSC)&lt;br/&gt;+ &lt;span style=&quot; font-weight:600;&quot;&gt;PCM-1610&lt;/span&gt; (2 канала, 16 бит, 44056/44100 Гц, NTSC)&lt;br/&gt;+ &lt;span style=&quot; font-weight:600;&quot;&gt;PCM-1630&lt;/span&gt; (2 канала, 16 бит, 44056/44100 Гц, NTSC)&lt;br/&gt;+ &lt;span style=&quot; font-weight:600;&quot;&gt;STC-007&lt;/span&gt; (2 канала, 14 бит, 44056 Гц, EIAJ NTSC)&lt;br/&gt;+ &lt;span style=&quot; font-weight:600;&quot;&gt;STC-008&lt;/span&gt; (2 канала, 14 бит, 44100 Гц, EIAJ PAL)&lt;br/&gt;+ &lt;span style=&quot; font-weight:600;&quot;&gt;PCM-F1&lt;/span&gt; (2 канала, 16 бит, 44056/44100 Гц, NTSC/PAL)&lt;/p&gt;&lt;/body&gt;&lt;/html&gt;</string>
+      <string>&lt;html&gt;&lt;head/&gt;&lt;body&gt;&lt;p&gt;+ &lt;span style=&quot; font-weight:600;&quot;&gt;PCM-1&lt;/span&gt; (2 канала, 13 бит, 44056 Гц, Sony Standard B, NTSC)&lt;br/&gt;+ &lt;span style=&quot; font-weight:600;&quot;&gt;PCM-1600&lt;/span&gt; (2 канала, 16 бит, 44056 Гц, Sony Standard A, NTSC)&lt;br/&gt;+ &lt;span style=&quot; font-weight:600;&quot;&gt;PCM-1610&lt;/span&gt; (2 канала, 16 бит, 44056/44100 Гц, NTSC)&lt;br/&gt;+ &lt;span style=&quot; font-weight:600;&quot;&gt;PCM-1630&lt;/span&gt; (2 канала, 16 бит, 44056/44100 Гц, NTSC)&lt;br/&gt;+ &lt;span style=&quot; font-weight:600;&quot;&gt;STC-007&lt;/span&gt; (2 канала, 14 бит, 44056 Гц, EIAJ NTSC)&lt;br/&gt;+ &lt;span style=&quot; font-weight:600;&quot;&gt;STC-008&lt;/span&gt; (2 канала, 14 бит, 44100 Гц, EIAJ PAL)&lt;br/&gt;+ &lt;span style=&quot; font-weight:600;&quot;&gt;PCM-F1&lt;/span&gt; (2 канала, 16 бит, 44056/44100 Гц, Sony PCM-F1, NTSC/PAL)&lt;/p&gt;&lt;/body&gt;&lt;/html&gt;</string>
      </property>
     </widget>
    </item>

audioprocessor.h

@@ -15,6 +15,7 @@
 #include <QString>
 #include "config.h"
 #include "frametrimset.h"
+#include "lookup.h"
 #include "pcmsamplepair.h"
 #include "samples2audio.h"
 #include "samples2wav.h"
@@ -48,7 +49,7 @@ class AudioProcessor : public QObject
         MIN_LONG_INVALID = 16,                  // Minimum length of invalid region to be count as long.
         MAX_STRAY_LEN = 24,                     // Maximum length of valid region to be count as stray.
         MIN_VALID_BEFORE = 3,                   // Minimum number of valid data points to keep at the start of the buffer.
-        MAX_RAMP_DOWN = 128,                    // Length of ramp-down to mute region (in data points).
+        MAX_RAMP_DOWN = 192,                    // Length of ramp-down to mute region (in data points).
         MAX_RAMP_UP = 32,                       // Length of ramp-up from mute region (in data points).
         CHANNEL_CNT = PCMSamplePair::CH_MAX,    // Number of channels for processing.
     };
@@ -75,21 +76,22 @@ class AudioProcessor : public QObject
 private:
     SamplesToAudio sc_output;                   // Handler for soundcard operations.
     SamplesToWAV wav_output;                    // Handler for WAV-file operations.
-    QString file_path;
-    QString file_name;
     std::deque<PCMSamplePair> *in_samples;      // Input sample pair queue (shared).
     QMutex *mtx_samples;                        // Mutex for input queue.
-    QTimer *tim_outflush;
+    QTimer *tim_outflush;                       // Timer for dumping output from cache when input stalles.
+    QTimer *tim_vu_fade;                        // Timer for VU levels drop off.
     std::deque<PCMSamplePair> prebuffer;        // Buffer for input data.
     std::deque<PCMSample> channel_bufs[CHANNEL_CNT];    // Per-channel buffers for sample processing.
-    std::deque<CoordinatePair> long_bads[CHANNEL_CNT];
+    std::deque<CoordinatePair> long_bads[CHANNEL_CNT];  // Per-channel buffers for regions of long invalid samples.
     uint8_t log_level;                          // Level of debug output.
     uint8_t mask_mode;                          // Mode of masking dropouts.
-    uint16_t min_valid_before;
-    uint16_t max_ramp_down;
-    uint16_t max_ramp_up;
+    uint16_t min_valid_before;                  // Minimum number of valid data points at the front of the buffer.
+    uint16_t max_ramp_down;                     // Length of ramp-down for interpolation from last valid sample into silence (inside invalid region).
+    uint16_t max_ramp_up;                       // Length of ramp-up for interpolation from silence (inside invalid region) into first valid sample.
     uint64_t sample_index;                      // Master index for samples for the current file.
     uint16_t sample_rate;                       // Last sample rate.
+    uint8_t vu_left;                            // VU-level for the left channel.
+    uint8_t vu_right;                           // VU-level for the right channel.
     bool file_end;                              // Detected end of a file.
     bool unprocessed;                           // Are there unprocessed audio samples?
     bool remove_stray;                          // Invalidate stray VALID samples.
@@ -109,21 +111,25 @@ class AudioProcessor : public QObject
     uint16_t setInvalids(std::deque<PCMSample> *samples, CoordinatePair &range);
     void fixStraySamples(std::deque<PCMSample> *samples, std::deque<CoordinatePair> *regions);
     uint16_t clearInvalids(std::deque<PCMSample> *samples, CoordinatePair &range);
-    uint16_t performMute(std::deque<PCMSample> *samples, CoordinatePair &range);
-    uint16_t performLevelHold(std::deque<PCMSample> *samples, CoordinatePair &range);
-    uint16_t performLinearInterpolation(std::deque<PCMSample> *samples, CoordinatePair &range);
+    uint16_t sampleMute(std::deque<PCMSample> *samples, int16_t offset);
+    uint16_t rangeMute(std::deque<PCMSample> *samples, CoordinatePair &range);
+    uint16_t rangeLevelHold(std::deque<PCMSample> *samples, CoordinatePair &range);
+    uint16_t rangeLinearInterpolation(std::deque<PCMSample> *samples, CoordinatePair &range);
     void fixBadSamples(std::deque<PCMSample> *samples);
     void dumpPrebuffer();
     void fillBufferForOutput();
+    void samplesToVU(PCMSamplePair *in_samples);
     void outputWordPair(PCMSamplePair *out_samples);
     void outputAudio();
     bool scanBuffer();
     void dumpBuffer();
 
 private slots:
-    void restartFlushTimer();
-    void actCloseOutput();
+    void restartFlushTimer();               // Stop and start flushing timer.
+    void redirectError(QString);            // Receive error message and redirect it.
+    void actFlushOutput();                  // Timer event for flushing buffer.
     void livePlayUpdate(bool);              // Emit [guiLivePB] signal to report live playback state.
+    void updateVUMeters();                  // Timer event for VU-meters updating and fading.
 
 public slots:
     void setLogLevel(uint8_t);              // Set logging level.
@@ -139,9 +145,11 @@ public slots:
 signals:
     void guiAddMask(uint16_t);              // Report new masked samples.
     void guiLivePB(bool);                   // Report live playback state.
+    void mediaError(QString);               // Error while processing audio.
     void newSource();                       // Report about changed source.
-    void reqTimerRestart();
+    void reqTimerRestart();                 // Deffered call for [restartFlushTimer()].
     void outSamples(PCMSamplePair);         // Copy of outputting samples.
+    void outVULevels(uint8_t, uint8_t);     // Report VU-meters.
     void stopOutput();                      // Report about thread terminating.
     void finished();
 };

binarizer.h

@@ -9,9 +9,9 @@
 *
 *                   This module takes one video line (of type [VideoLine]) and performs:
 *                       - AGC (Automatic Gain Control), statistically detecting BLACK and WHITE levels;
-*                       - Automatic reference level detection, detecting the best threshold for binarization;
+*                       - ARLD (Automatic Reference Level Detection), detecting the best threshold for binarization;
 *                       - TBC (Time-Based Correction), detecting horizontal offset of the PCM data in the line;
-*                       - binarization with set mode;
+*                       - Binarization with set mode;
 *                       - Brute force picking bits that were cut off the edge of the video line (for PCM-1 and PCM-16x0).
 *
 *                   Binarization itself can be done with different speed/quality ratios,

capt_sel.cpp

@@ -13,6 +13,9 @@ capt_sel::capt_sel(QWidget *parent) :
     capt_dev = NULL;
     capture_rate = 100;
 
+    //ui->viewport->setViewportUpdateMode(QGraphicsView::NoViewportUpdate);
+    ui->viewport->setOptimizationFlags(QGraphicsView::DontSavePainterState|QGraphicsView::DontAdjustForAntialiasing);
+
     scene = new QGraphicsScene(this);
     ui->viewport->setScene(scene);
     ui->viewport->setAlignment(Qt::AlignLeft|Qt::AlignTop);
@@ -42,7 +45,7 @@ capt_sel::capt_sel(QWidget *parent) :
     connect(capt_dev, SIGNAL(sigInputClosed()), this, SLOT(captureClosed()));
     connect(capt_dev, SIGNAL(sigVideoError(uint32_t)), this, SLOT(captureError(uint32_t)));
     connect(capt_dev, SIGNAL(newDeviceList(VCapList)), this, SLOT(refillDevList(VCapList)));
-    ffmpeg_thread->start();
+    ffmpeg_thread->start(QThread::HighPriority);
 
     connect(ui->btnClose, SIGNAL(clicked(bool)), this, SLOT(usrClose()));
     connect(ui->btnSave, SIGNAL(clicked(bool)), this, SLOT(usrSave()));
@@ -466,8 +469,10 @@ void capt_sel::redrawPreview(QImage in_image, bool in_double)
         return;
     }
     draw_rate = capt_meas.elapsed();
+    // Check if this frame contains dropped frames counter.
     if(in_image.height()!=FFMPEGWrapper::DUMMY_HEIGTH)
     {
+        // It's normal frame for displaying.
         //qDebug()<<"[CSEL] New image";
         // Update pixmap.
         pixels->setPixmap(QPixmap::fromImage(in_image.copy()));
@@ -488,6 +493,7 @@ void capt_sel::redrawPreview(QImage in_image, bool in_double)
     }
     else
     {
+        // It's a dummy, containing dropped frames counter.
         qDebug()<<"[CSEL] New dummy image";
         // Skip dummy frame and request next one.
         pollCapture();