H264 HW encode using MediaFoundation

media/base/win/mf_helpers.h

+// Copyright 2016 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_BASE_WIN_MF_HELPERS_H_
+#define MEDIA_BASE_WIN_MF_HELPERS_H_
+
+#include <mfapi.h>
+#include <stdint.h>
+
+#include "base/win/scoped_comptr.h"
+#include "media/base/win/mf_initializer_export.h"
+
+namespace media {
+
+namespace mf {
+
+#define RETURN_ON_FAILURE(result, log, ret) \
+  do {                                      \
+    if (!(result)) {                        \
+      DLOG(ERROR) << log;                   \
+      return ret;                           \
+    }                                       \
+  } while (0)
+
+#define RETURN_ON_HR_FAILURE(result, log, ret) \
+  RETURN_ON_FAILURE(SUCCEEDED(result),         \
+                    log << ", HRESULT: 0x" << std::hex << result, ret);
+
+#define RETURN_AND_NOTIFY_ON_FAILURE(result, log, error_code, ret) \
+  do {                                                             \
+    if (!(result)) {                                               \
+      DVLOG(1) << log;                                             \
+      StopOnError(error_code);                                     \
+      return ret;                                                  \
+    }                                                              \
+  } while (0)
+
+#define RETURN_AND_NOTIFY_ON_HR_FAILURE(result, log, error_code, ret)        \
+  RETURN_AND_NOTIFY_ON_FAILURE(SUCCEEDED(result),                            \
+                               log << ", HRESULT: 0x" << std::hex << result, \
+                               error_code, ret);
+
+// Creates a Media Foundation sample with one buffer of length |buffer_length|
+// on a |align|-byte boundary. Alignment must be a perfect power of 2 or 0.
+MF_INITIALIZER_EXPORT IMFSample* CreateEmptySampleWithBuffer(
+    uint32_t buffer_length, int align);
+
+// Provides scoped access to the underlying buffer in an IMFMediaBuffer
+// instance.
+class MF_INITIALIZER_EXPORT MediaBufferScopedPointer {
+ public:
+  MediaBufferScopedPointer(IMFMediaBuffer* media_buffer);
+  ~MediaBufferScopedPointer();
+
+  uint8_t* get() { return buffer_; }
+  DWORD current_length() const { return current_length_; }
+
+ private:
+  base::win::ScopedComPtr<IMFMediaBuffer> media_buffer_;
+  uint8_t* buffer_;
+  DWORD max_length_;
+  DWORD current_length_;
+
+  DISALLOW_COPY_AND_ASSIGN(MediaBufferScopedPointer);
+};
+
+}  // namespace mf
+
+}  // namespace media
+
+#endif  // MEDIA_BASE_WIN_MF_HELPERS_H_