fixed styling, and added WavParser example.

Author: stephenhensley

examples/WavParser/CMakeLists.txt

@@ -0,0 +1,3 @@
+set(FIRMWARE_NAME WavParser)
+set(FIRMWARE_SOURCES main.cpp)
+include(DaisyProject)

examples/WavParser/Makefile

@@ -0,0 +1,17 @@
+# Project Name
+TARGET = WavParser
+
+# Sources
+CPP_SOURCES = main.cpp
+
+DEBUG=0
+OPT=-O3
+
+USE_FATFS=1
+
+# Library Locations
+LIBDAISY_DIR = ../..
+
+# Core location, and generic Makefile.
+SYSTEM_FILES_DIR = $(LIBDAISY_DIR)/core
+include $(SYSTEM_FILES_DIR)/Makefile

examples/WavParser/main.cpp

@@ -0,0 +1,90 @@
+/** Simple example of WavParser class
+ *
+ *  Prints out some information about the WAV files on
+ *  an attached SD card.
+ *
+ *  To run this:
+ *  1. Put some WAV files on an SD Card
+ *     (This program will look at the first four it finds).
+ *  2. Program the Daisy with this example, and the SD Card connected.
+ *  3. Connect to the Daisy via USB Serial
+ *  4. A list of the files found with some audio info will be output
+ */
+#include "daisy_seed.h"
+
+using namespace daisy;
+
+static constexpr const size_t kMaxFiles = 4;
+
+static DaisySeed            hw;
+static SdmmcHandler         sdmmc;
+static FatFSInterface       fsi;
+static FileTable<kMaxFiles> file_table;
+static FIL                  file;
+
+int main(void)
+{
+    /** Initialize our hardware */
+    hw.Init(true);
+    hw.StartLog(true);
+
+    /** SD Card / FatFS Interface Init */
+    SdmmcHandler::Config sdcfg;
+    sdcfg.Defaults();
+    sdcfg.speed = SdmmcHandler::Speed::STANDARD;
+    sdcfg.width = SdmmcHandler::BusWidth::BITS_1;
+    sdmmc.Init(sdcfg);
+    fsi.Init(FatFSInterface::Config::Media::MEDIA_SD);
+    f_mount(&fsi.GetSDFileSystem(), "/", 1);
+
+    /** We'll fill up the table with WAV files and
+     *  then parse those, and present some info.
+     */
+    file_table.Fill("/", ".wav");
+
+
+    if(file_table.GetNumFiles() > 0)
+    {
+        for(size_t i = 0; i < file_table.GetNumFiles(); i++)
+        {
+            auto sta = f_open(
+                &file, file_table.GetFileName(i), (FA_OPEN_EXISTING | FA_READ));
+            if(sta != FR_OK)
+            {
+                hw.PrintLine("Could not open: %s", file_table.GetFileName(i));
+                continue;
+            }
+            FileReader reader(&file);
+            WavParser  parser;
+            if(!parser.parse(reader))
+            {
+                hw.PrintLine("Error parsing file: %s",
+                             file_table.GetFileName(i));
+                continue;
+            }
+
+            const auto& info = parser.info();
+            hw.PrintLine("File Information: %s", file_table.GetFileName(i));
+            hw.PrintLine("\tSample Rate:\t%d", info.sampleRate);
+            hw.PrintLine("\tChannels:\t%d", info.numChannels);
+            hw.PrintLine("\tBit Depth:\t%d", info.bitsPerSample);
+
+            /** File Duration in seconds */
+            size_t dur_samples
+                = parser.dataSize()
+                  / ((info.bitsPerSample / 8) * info.numChannels);
+            float dur_seconds = static_cast<float>(dur_samples)
+                                / static_cast<float>(info.sampleRate);
+            float frac = dur_seconds - static_cast<int>(dur_seconds);
+            hw.PrintLine("\tDuration (seconds):\t%d.%02d",
+                         static_cast<size_t>(dur_seconds),
+                         static_cast<size_t>(frac * 100.f));
+
+            /** Number of metadata chunks */
+            hw.PrintLine("\tMetaData Chunks:\t%d", parser.metadataCount());
+        }
+    }
+
+
+    while(1) {}
+}

src/util/FileTable.h

@@ -40,7 +40,7 @@ class FileTable
      *
      * @return true if files are loaded, otherwise false
      */
-    bool Fill(const char *path, const char *endswith=nullptr)
+    bool Fill(const char *path, const char *endswith = nullptr)
     {
         FRESULT res = FR_OK;
         if(path == nullptr)