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// Copyright 2015 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_GPU_AVDA_RETURN_ON_FAILURE_H_
#define MEDIA_GPU_AVDA_RETURN_ON_FAILURE_H_
#include "media/video/video_decode_accelerator.h"
// Helper macros for dealing with failure. If |result| evaluates false, emit
// |log| to ERROR, register |error| with the decoder, and return. This will
// also transition to the error state, stopping further decoding.
// This is meant to be used only within AndroidVideoDecoder and the various
// backing strategies. |provider| must support PostError. The varargs
// can be used for the return value.
#define RETURN_ON_FAILURE(provider, result, log, error, ...) \
do { \
if (!(result)) { \
DLOG(ERROR) << log; \
provider->PostError(FROM_HERE, media::VideoDecodeAccelerator::error); \
return __VA_ARGS__; \
} \
} while (0)
// Similar to the above, with some handy boilerplate savings. The varargs
// can be used for the return value.
#define RETURN_IF_NULL(ptr, ...) \
RETURN_ON_FAILURE(state_provider_, ptr, "Got null for " << #ptr, \
ILLEGAL_STATE, ##__VA_ARGS__);
// Return null if !ptr.
#define RETURN_NULL_IF_NULL(ptr) RETURN_IF_NULL(ptr, 0)
#endif // MEDIA_GPU_AVDA_RETURN_ON_FAILURE_H_