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// 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 <wrl/client.h>
#include "base/logging.h"
#include "base/macros.h"
#include "media/base/win/mf_initializer_export.h"
struct ID3D11DeviceChild;
namespace media {
// Helper function to print HRESULT to std::string.
const auto PrintHr = logging::SystemErrorCodeToString;
// Helper macro for DVLOG with function name and this pointer.
#define DVLOG_FUNC(level) DVLOG(level) << __func__ << ": (" << this << ") "
// Macros that contain return statements can make code harder to read. Only use
// these when necessary, e.g. in places where we deal with a lot of Windows API
// calls, for each of which we have to check the returned HRESULT.
// See discussion thread at:
// https://groups.google.com/a/chromium.org/d/msg/cxx/zw5Xmcs--S4/r7Fwb-TsCAAJ
#define RETURN_IF_FAILED(expr) \
do { \
HRESULT hresult = (expr); \
if (FAILED(hresult)) { \
DLOG(ERROR) << __func__ << ": failed with \"" << PrintHr(hresult) \
<< "\""; \
return hresult; \
} \
} while (0)
#define RETURN_ON_FAILURE(success, log, ret) \
do { \
if (!(success)) { \
DLOG(ERROR) << log; \
return ret; \
} \
} while (0)
#define RETURN_ON_HR_FAILURE(hresult, log, ret) \
RETURN_ON_FAILURE(SUCCEEDED(hresult), log << ", " << PrintHr(hresult), 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 Microsoft::WRL::ComPtr<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:
explicit MediaBufferScopedPointer(IMFMediaBuffer* media_buffer);
~MediaBufferScopedPointer();
uint8_t* get() { return buffer_; }
DWORD current_length() const { return current_length_; }
DWORD max_length() const { return max_length_; }
private:
Microsoft::WRL::ComPtr<IMFMediaBuffer> media_buffer_;
uint8_t* buffer_;
DWORD max_length_;
DWORD current_length_;
DISALLOW_COPY_AND_ASSIGN(MediaBufferScopedPointer);
};
// Copies |in_string| to |out_string| that is allocated with CoTaskMemAlloc().
MF_INITIALIZER_EXPORT HRESULT CopyCoTaskMemWideString(LPCWSTR in_string,
LPWSTR* out_string);
// Set the debug name of a D3D11 resource for use with ETW debugging tools.
// D3D11 retains the string passed to this function.
MF_INITIALIZER_EXPORT HRESULT
SetDebugName(ID3D11DeviceChild* d3d11_device_child, const char* debug_string);
} // namespace media
#endif // MEDIA_BASE_WIN_MF_HELPERS_H_
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