FT8 demod: removed sndfile dependency

ft8/util.cpp

@@ -18,7 +18,6 @@
 // You should have received a copy of the GNU General Public License             //
 // along with this program. If not, see <http://www.gnu.org/licenses/>.          //
 ///////////////////////////////////////////////////////////////////////////////////
-#include <sndfile.h>
 #include <sys/time.h>
 #include <assert.h>
 #include <math.h>
@@ -37,61 +36,6 @@ double now()
     return tv.tv_sec + tv.tv_usec / 1000000.0;
 }
 
-void writewav(const std::vector<float> &samples, const char *filename, int rate)
-{
-    float mx = 0;
-    for (ulong i = 0; i < samples.size(); i++)
-    {
-        mx = std::max(mx, std::abs(samples[i]));
-    }
-    std::vector<float> v(samples.size());
-    for (ulong i = 0; i < samples.size(); i++)
-    {
-        v[i] = (samples[i] / mx) * 0.95;
-    }
-
-    SF_INFO sf;
-    sf.channels = 1;
-    sf.samplerate = rate;
-    sf.format = SF_FORMAT_WAV | SF_FORMAT_PCM_16;
-    SNDFILE *f = sf_open(filename, SFM_WRITE, &sf);
-    assert(f);
-    sf_write_float(f, v.data(), v.size());
-    sf_write_sync(f);
-    sf_close(f);
-}
-
-std::vector<float> readwav(const char *filename, int &rate_out)
-{
-    SF_INFO info;
-    memset(&info, 0, sizeof(info));
-    SNDFILE *sf = sf_open(filename, SFM_READ, &info);
-    if (sf == 0)
-    {
-        fprintf(stderr, "cannot open %s\n", filename);
-        exit(1); // XXX
-    }
-    rate_out = info.samplerate;
-
-    std::vector<float> out;
-
-    while (1)
-    {
-        float buf[512];
-        int n = sf_read_float(sf, buf, 512);
-        if (n <= 0)
-            break;
-        for (int i = 0; i < n; i++)
-        {
-            out.push_back(buf[i]);
-        }
-    }
-
-    sf_close(sf);
-
-    return out;
-}
-
 void writetxt(std::vector<float> v, const char *filename)
 {
     FILE *fp = fopen(filename, "w");

ft8/util.h

@@ -27,8 +27,6 @@
 namespace FT8
 {
 double now();
-void writewav(const std::vector<float> &samples, const char *filename, int rate);
-std::vector<float> readwav(const char *filename, int &rate_out);
 void writetxt(std::vector<float> v, const char *filename);
 std::complex<float> goertzel(std::vector<float> v, int rate, int i0, int n, float hz);
 float vmax(const std::vector<float> &v);

sdrbase/dsp/wavfilerecord.cpp

@@ -325,7 +325,7 @@ void WavFileRecord::writeHeader()
     writeHeader(m_sampleFile, header);
 }
 
-bool WavFileRecord::readHeader(std::ifstream& sampleFile, Header& header)
+bool WavFileRecord::readHeader(std::ifstream& sampleFile, Header& header, bool check)
 {
     memset(&header, 0, sizeof(Header));
 
@@ -336,7 +336,7 @@ bool WavFileRecord::readHeader(std::ifstream& sampleFile, Header& header)
         return false;
     }
 
-    if (!checkHeader(header)) {
+    if (check && !checkHeader(header)) {
         return false;
     }
 

sdrbase/dsp/wavfilerecord.h

@@ -111,7 +111,7 @@ public:
     virtual bool stopRecording() override;
     virtual bool isRecording() const override { return m_recordOn; }
 
-    static bool readHeader(std::ifstream& samplefile, Header& header);
+    static bool readHeader(std::ifstream& samplefile, Header& header, bool check=true);
     static bool readHeader(QFile& samplefile, Header& header);
     static void writeHeader(std::ofstream& samplefile, Header& header);
     static void writeHeader(QFile& samplefile, Header& header);

sdrbench/test_ft8.cpp

@@ -15,10 +15,14 @@
 // along with this program. If not, see <http://www.gnu.org/licenses/>.          //
 ///////////////////////////////////////////////////////////////////////////////////
 
+#include <iostream>
+#include <fstream>
+
 #include "mainbench.h"
+#include "dsp/wavfilerecord.h"
+
 #ifdef LINUX
 #include "ft8/ft8.h"
-#include "ft8/util.h"
 #include "ft8/unpack.h"
 
 #include <QMutex>
@@ -104,13 +108,70 @@ void MainBench::testFT8(const QString& wavFile)
     double budget = 2.5; // compute for this many seconds per cycle
     TestFT8Callback testft8Callback;
 
-    int rate;
-    std::vector<float> s = FT8::readwav(wavFile.toStdString().c_str(), rate);
+    std::ifstream wfile;
+
+#ifdef Q_OS_WIN
+	wfile.open(m_settings.m_fileName.toStdWString().c_str(), std::ios::binary | std::ios::ate);
+#else
+	wfile.open(wavFile.toStdString().c_str(), std::ios::binary | std::ios::ate);
+#endif
+    WavFileRecord::Header header;
+    wfile.seekg(0, std::ios_base::beg);
+    bool headerOK = WavFileRecord::readHeader(wfile, header, false);
+
+    if (!headerOK)
+    {
+        qDebug("MainBench::testFT8: test file is not a wave file");
+        return;
+    }
+
+    if (header.m_sampleRate != 12000)
+    {
+        qDebug("MainBench::testFT8: wave file sample rate is not 12000 S/s");
+        return;
+    }
+
+    if (header.m_bitsPerSample != 16)
+    {
+        qDebug("MainBench::testFT8: sample size is not 16 bits");
+        return;
+    }
+
+    if (header.m_audioFormat != 1)
+    {
+        qDebug("MainBench::testFT8: wav file format is not PCM");
+        return;
+    }
+
+    if (header.m_dataHeader.m_size != 360000)
+    {
+        qDebug("MainBench::testFT8: wave file size is not 15s at 12000 S/s");
+        return;
+    }
+
+    const int bufsize = 1000;
+    int16_t buffer[bufsize];
+    std::vector<float> samples;
+    uint32_t remainder = header.m_dataHeader.m_size;
+
+    while (remainder != 0)
+    {
+        wfile.read((char *) buffer, bufsize*2);
+
+        for (int i = 0; i < bufsize; i++) {
+            samples.push_back(buffer[i] / 32768.0f);
+        }
+
+        remainder -= bufsize*2;
+    }
+
+    wfile.close();
+
     FT8::entry(
-        s.data(),
-        s.size(),
-        0.5 * rate,
-        rate,
+        samples.data(),
+        samples.size(),
+        0.5 * header.m_sampleRate,
+        header.m_sampleRate,
         150,
         3600, // 2900,
         hints,