initial proto

1 files changed, 80 insertions, 0 deletions

diff --git a/cwav.c b/cwav.c
new file mode 100644
index 00000000..ae131ae7
--- /dev/null
+++ b/cwav.c
@@ -0,0 +1,80 @@
+#include <string.h>
+#include <stdio.h>
+#include "codec.h"
+#include "cwav.h"
+
+typedef struct {
+    uint32_t riffMagic;
+    uint32_t size;
+    uint32_t waveMagic;
+    uint32_t fmtMagic;
+    uint32_t chunkSize;
+    uint16_t formatTag;
+    uint16_t channels;
+    uint32_t samplesPerSecond;
+    uint32_t bytesPerSecond;
+    uint16_t blockAlignment;
+    uint16_t bitsPerSample;
+    uint32_t dataMagic;
+    uint32_t dataSize;
+} wavHeader_t;
+
+static FILE *file;
+
+int cwav_init (const char *fname) {
+
+    file = fopen (fname, "rb");
+    if (!file) {
+        return -1;
+    }
+
+    wavHeader_t header;
+
+    // read WAV header
+    if (fread (&header, sizeof (header), 1, file) != sizeof (header))
+    {
+        printf ("WARNING: WAV header not found in %s\n", fname);
+        fclose (file);
+        file = NULL;
+        return -1;
+    }
+    cwav.info.bitsPerSample = header.bitsPerSample;
+    cwav.info.channels = header.channels;
+    cwav.info.dataSize = header.dataSize;
+    cwav.info.samplesPerSecond = header.samplesPerSecond;
+
+    return 0;
+}
+
+void
+cwav_free (void)
+{
+    if (file)
+    {
+        fclose (file);
+        file = NULL;
+    }
+}
+
+int
+cwav_read (char *bytes, int size) {
+    int bytesread = 0;
+    int first = 1;
+    for (;;) {
+        int bytesread = fread (bytes, size, 1, file);
+        if (bytesread == size) {
+            break;
+        }
+        size -= bytesread;
+        bytes += bytesread;
+        fseek (file, sizeof (wavHeader_t), SEEK_SET);
+    }
+    return 0;
+}
+
+codec_t cwav = {
+    .init = cwav_init,
+    .free = cwav_free,
+    .read = cwav_read
+};
+