Split up disorder-decode source into one file per format.

[disorder] / server / decode-ogg.c

diff --git a/server/decode-ogg.c b/server/decode-ogg.c
new file mode 100644 (file)
index 0000000..d499955
--- /dev/null
+++ b/server/decode-ogg.c
@@ -0,0 +1,92 @@
+/*
+ * This file is part of DisOrder
+ * Copyright (C) 2007-2010 Richard Kettlewell
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ * 
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+/** @file server/decode.c
+ * @brief General-purpose decoder for use by speaker process
+ */
+#include "decode.h"
+
+#include <vorbis/vorbisfile.h>
+
+static size_t ogg_read_func(void *ptr, size_t size, size_t nmemb, void *datasource) {
+  struct hreader *h = datasource;
+  
+  int n = hreader_read(h, ptr, size * nmemb);
+  if(n < 0) n = 0;
+  return n / size;
+}
+
+static int ogg_seek_func(void *datasource, ogg_int64_t offset, int whence) {
+  struct hreader *h = datasource;
+  
+  return hreader_seek(h, offset, whence) < 0 ? -1 : 0;
+}
+
+static int ogg_close_func(void attribute((unused)) *datasource) {
+  return 0;
+}
+
+static long ogg_tell_func(void *datasource) {
+  struct hreader *h = datasource;
+  
+  return hreader_seek(h, 0, SEEK_CUR);
+}
+
+static const ov_callbacks ogg_callbacks = {
+  ogg_read_func,
+  ogg_seek_func,
+  ogg_close_func,
+  ogg_tell_func,
+};
+
+/** @brief OGG decoder */
+void decode_ogg(void) {
+  struct hreader ogginput[1];
+  OggVorbis_File vf[1];
+  int err;
+  long n;
+  int bitstream;
+  vorbis_info *vi;
+
+  hreader_init(path, ogginput);
+  /* There doesn't seem to be any standard function for mapping the error codes
+   * to strings l-( */
+  if((err = ov_open_callbacks(ogginput, vf, 0/*initial*/, 0/*ibytes*/,
+                              ogg_callbacks)))
+    disorder_fatal(0, "ov_open_callbacks %s: %d", path, err);
+  if(!(vi = ov_info(vf, 0/*link*/)))
+    disorder_fatal(0, "ov_info %s: failed", path);
+  while((n = ov_read(vf, input_buffer, sizeof input_buffer, 1/*bigendianp*/,
+                     2/*bytes/word*/, 1/*signed*/, &bitstream))) {
+    if(n < 0)
+      disorder_fatal(0, "ov_read %s: %ld", path, n);
+    if(bitstream > 0)
+      disorder_fatal(0, "only single-bitstream ogg files are supported");
+    output_header(vi->rate, vi->channels, 16/*bits*/, n, ENDIAN_BIG);
+    if(fwrite(input_buffer, 1, n, outputfp) < (size_t)n)
+      disorder_fatal(errno, "decoding %s: writing sample data", path);
+  }
+}
+
+/*
+Local Variables:
+c-basic-offset:2
+comment-column:40
+fill-column:79
+indent-tabs-mode:nil
+End:
+*/