Reland "Move webrtc/{base => rtc_base}" (https://codereview.webrtc.org/2877023002)
Reland the base->rtc_base without adding stub headers (will be
done in follow-up CL). This preserves git blame history of all files.
BUG=webrtc:7634
NOTRY=True
TBR=kwiberg@webrtc.org
Change-Id: Iea3bb6f3f67b8374c96337b63e8f5aa3e6181012
Reviewed-on: https://chromium-review.googlesource.com/554611
Reviewed-by: Henrik Kjellander <kjellander@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#18821}diff --git a/webrtc/rtc_base/transformadapter.h b/webrtc/rtc_base/transformadapter.h
new file mode 100644
index 0000000..0818899
--- /dev/null
+++ b/webrtc/rtc_base/transformadapter.h
@@ -0,0 +1,84 @@
+/*
+ * 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 WEBRTC_RTC_BASE_TRANSFORMADAPTER_H_
+#define WEBRTC_RTC_BASE_TRANSFORMADAPTER_H_
+
+#include "webrtc/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 // WEBRTC_RTC_BASE_TRANSFORMADAPTER_H_