mirror of
https://github.com/mollyim/webrtc.git
synced 2025-05-13 22:00:47 +01:00
665174fdbb
Running clang-format with chromium's style guide. The goal is n-fold: * providing consistency and readability (that's what code guidelines are for) * preventing noise with presubmit checks and git cl format * building on the previous point: making it easier to automatically fix format issues * you name it Please consider using git-hyper-blame to ignore this commit. Bug: webrtc:9340 Change-Id: I694567c4cdf8cee2860958cfe82bfaf25848bb87 Reviewed-on: https://webrtc-review.googlesource.com/81185 Reviewed-by: Patrik Höglund <phoglund@webrtc.org> Cr-Commit-Position: refs/heads/master@{#23660}
86 lines
2.9 KiB
C++
86 lines
2.9 KiB
C++
/*
|
|
* Copyright 2004 The WebRTC Project Authors. All rights reserved.
|
|
*
|
|
* Use of this source code is governed by a BSD-style license
|
|
* that can be found in the LICENSE file in the root of the source
|
|
* tree. An additional intellectual property rights grant can be found
|
|
* in the file PATENTS. All contributing project authors may
|
|
* be found in the AUTHORS file in the root of the source tree.
|
|
*/
|
|
|
|
#ifndef RTC_BASE_TRANSFORMADAPTER_H_
|
|
#define RTC_BASE_TRANSFORMADAPTER_H_
|
|
|
|
#include "rtc_base/stream.h"
|
|
|
|
namespace rtc {
|
|
///////////////////////////////////////////////////////////////////////////////
|
|
|
|
class TransformInterface {
|
|
public:
|
|
virtual ~TransformInterface() {}
|
|
|
|
// Transform should convert the in_len bytes of input into the out_len-sized
|
|
// output buffer. If flush is true, there will be no more data following
|
|
// input.
|
|
// After the transformation, in_len contains the number of bytes consumed, and
|
|
// out_len contains the number of bytes ready in output.
|
|
// Note: Transform should not return SR_BLOCK, as there is no asynchronous
|
|
// notification available.
|
|
virtual StreamResult Transform(const void* input,
|
|
size_t* in_len,
|
|
void* output,
|
|
size_t* out_len,
|
|
bool flush) = 0;
|
|
};
|
|
|
|
///////////////////////////////////////////////////////////////////////////////
|
|
|
|
// TransformAdapter causes all data passed through to be transformed by the
|
|
// supplied TransformInterface object, which may apply compression, encryption,
|
|
// etc.
|
|
|
|
class TransformAdapter : public StreamAdapterInterface {
|
|
public:
|
|
// Note that the transformation is unidirectional, in the direction specified
|
|
// by the constructor. Operations in the opposite direction result in SR_EOS.
|
|
TransformAdapter(StreamInterface* stream,
|
|
TransformInterface* transform,
|
|
bool direction_read);
|
|
~TransformAdapter() override;
|
|
|
|
StreamResult Read(void* buffer,
|
|
size_t buffer_len,
|
|
size_t* read,
|
|
int* error) override;
|
|
StreamResult Write(const void* data,
|
|
size_t data_len,
|
|
size_t* written,
|
|
int* error) override;
|
|
void Close() override;
|
|
|
|
// Apriori, we can't tell what the transformation does to the stream length.
|
|
bool GetAvailable(size_t* size) const override;
|
|
bool ReserveSize(size_t size) override;
|
|
|
|
// Transformations might not be restartable
|
|
virtual bool Rewind();
|
|
|
|
private:
|
|
enum State { ST_PROCESSING, ST_FLUSHING, ST_COMPLETE, ST_ERROR };
|
|
enum { BUFFER_SIZE = 1024 };
|
|
|
|
TransformInterface* transform_;
|
|
bool direction_read_;
|
|
State state_;
|
|
int error_;
|
|
|
|
char buffer_[BUFFER_SIZE];
|
|
size_t len_;
|
|
};
|
|
|
|
///////////////////////////////////////////////////////////////////////////////
|
|
|
|
} // namespace rtc
|
|
|
|
#endif // RTC_BASE_TRANSFORMADAPTER_H_
|