initial proto

1 files changed, 75 insertions, 0 deletions

diff --git a/cvorbis.c b/cvorbis.c
new file mode 100644
index 00000000..7ce772e1
--- /dev/null
+++ b/cvorbis.c
@@ -0,0 +1,75 @@
+#include <vorbis/codec.h>
+#include <vorbis/vorbisfile.h>
+#include <string.h>
+#include <stdio.h>
+#include "codec.h"
+#include "cvorbis.h"
+
+static FILE *file;
+static OggVorbis_File vorbis_file;
+static vorbis_info *vi;
+static int cur_bit_stream;
+
+int cvorbis_init (const char *fname) {
+    file = NULL;
+    vi = NULL;
+    cur_bit_stream = -1;
+
+    file = fopen (fname, "rb");
+    if (!file) {
+        return -1;
+    }
+
+    memset (&cvorbis.info, 0, sizeof (fileinfo_t));
+    ov_open (file, &vorbis_file, NULL, 0);
+    vi = ov_info (&vorbis_file, -1);
+    cvorbis.info.bitsPerSample = 16;
+    cvorbis.info.dataSize = ov_pcm_total (&vorbis_file, -1) * vi->channels * 2;
+    cvorbis.info.channels = vi->channels;
+    cvorbis.info.samplesPerSecond = vi->rate;
+    return 0;
+}
+
+void
+cvorbis_free (void) {
+    fclose (file);
+    ov_clear (&vorbis_file);
+    vi = NULL;
+}
+
+int
+cvorbis_read (char *bytes, int size)
+{
+    if (!file)
+        return -1;
+    for (;;)
+    {
+        // read ogg
+        long ret=ov_read (&vorbis_file, bytes, size, 0, 2, 1, &cur_bit_stream);
+        if (ret < 0)
+        {
+            printf ("WARNING: ogg vorbis decoder tells error %x\n", ret);
+            memset (bytes, 0, size);
+            return -1;
+        }
+        else if (ret < size)
+        {
+            if (ret == 0) {
+                ov_raw_seek (&vorbis_file, 0);
+            }
+            size -= ret;
+            bytes += ret;
+        }
+        else {
+            break;
+        }
+    }
+    return 0;
+}
+
+codec_t cvorbis = {
+    .init = cvorbis_init,
+    .free = cvorbis_free,
+    .read = cvorbis_read
+};
+