1 files changed, 82 insertions, 0 deletions
diff --git a/media/ffmpeg/ffmpeg_common.h b/media/ffmpeg/ffmpeg_common.h
new file mode 100644
index 0000000..9be245f
--- /dev/null
+++ b/media/ffmpeg/ffmpeg_common.h
@@ -0,0 +1,82 @@
+// Copyright (c) 2010 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef MEDIA_FFMPEG_FFMPEG_COMMON_H_
+#define MEDIA_FFMPEG_FFMPEG_COMMON_H_
+
+// Used for FFmpeg error codes.
+#include <cerrno>
+
+#include "base/compiler_specific.h"
+#include "base/singleton.h"
+
+// Used with URLProtocol.
+typedef int64 offset_t;
+
+// Include FFmpeg header files.
+extern "C" {
+// Temporarily disable possible loss of data warning.
+// TODO(scherkus): fix and upstream the compiler warnings.
+MSVC_PUSH_DISABLE_WARNING(4244);
+#include "third_party/ffmpeg/include/libavcodec/avcodec.h"
+#include "third_party/ffmpeg/include/libavformat/avformat.h"
+#include "third_party/ffmpeg/include/libavutil/log.h"
+MSVC_POP_WARNING();
+}  // extern "C"
+
+namespace media {
+
+// FFmpegLock is used to serialize calls to avcodec_open(), avcodec_close(),
+// and av_find_stream_info() for an entire process because for whatever reason
+// it does Very Bad Things to other FFmpeg instances.
+//
+// TODO(scherkus): track down and upstream a fix to FFmpeg, if possible.
+class FFmpegLock : public Singleton<FFmpegLock> {
+ public:
+  Lock& lock();
+
+ private:
+  // Only allow Singleton to create and delete FFmpegLock.
+  friend struct DefaultSingletonTraits<FFmpegLock>;
+  FFmpegLock();
+  virtual ~FFmpegLock();
+
+  Lock lock_;
+  DISALLOW_COPY_AND_ASSIGN(FFmpegLock);
+};
+
+
+// Wraps FFmpeg's av_free() in a class that can be passed as a template argument
+// to scoped_ptr_malloc.
+class ScopedPtrAVFree {
+ public:
+  inline void operator()(void* x) const {
+    av_free(x);
+  }
+};
+
+// This assumes that the AVPacket being captured was allocated outside of
+// FFmpeg via the new operator.  Do not use this with AVPacket instances that
+// are allocated via malloc() or av_malloc().
+class ScopedPtrAVFreePacket {
+ public:
+  inline void operator()(void* x) const {
+    AVPacket* packet = static_cast<AVPacket*>(x);
+    av_free_packet(packet);
+    delete packet;
+  }
+};
+
+
+// FFmpeg MIME types.
+namespace mime_type {
+
+extern const char kFFmpegAudio[];
+extern const char kFFmpegVideo[];
+
+}  // namespace mime_type
+
+}  // namespace media
+
+#endif  // MEDIA_FFMPEG_FFMPEG_COMMON_H_