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-rw-r--r--dom/media/VorbisUtils.h27
1 files changed, 27 insertions, 0 deletions
diff --git a/dom/media/VorbisUtils.h b/dom/media/VorbisUtils.h
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+++ b/dom/media/VorbisUtils.h
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+/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim:set ts=2 sw=2 sts=2 et cindent: */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#ifndef VORBISUTILS_H_
+#define VORBISUTILS_H_
+
+#ifdef MOZ_SAMPLE_TYPE_S16
+# include <ogg/os_types.h>
+typedef ogg_int32_t VorbisPCMValue;
+
+# define MOZ_CLIP_TO_15(x) ((x) < -32768 ? -32768 : (x) <= 32767 ? (x) : 32767)
+// Convert the output of vorbis_synthesis_pcmout to a AudioDataValue
+# define MOZ_CONVERT_VORBIS_SAMPLE(x) \
+ (static_cast<AudioDataValue>(MOZ_CLIP_TO_15((x) >> 9)))
+
+#else /* MOZ_SAMPLE_TYPE_FLOAT32 */
+
+typedef float VorbisPCMValue;
+
+# define MOZ_CONVERT_VORBIS_SAMPLE(x) (x)
+
+#endif
+
+#endif /* VORBISUTILS_H_ */