a249c67504
This CL is a merge from the widevine repo of: http://go/wvgerrit/16491 Circular Buffer http://go/wvgerrit/16512 Circular Buffer Tests http://go/wvgerrit/16493 Entry Writer http://go/wvgerrit/16495 Profiled Scope http://go/wvgerrit/16500 Stats Collection http://go/wvgerrit/16543 Disallow Stats Copy or Assign http://go/wvgerrit/16514 Moving OEM Function Enum http://go/wvgerrit/16501 Defining Session Interface http://go/wvgerrit/16502 Session Definitions http://go/wvgerrit/16573 Remove code to num bytes table http://go/wvgerrit/16556 Connecting Profiler to Profiled Scope http://go/wvgerrit/16557 Android Reading Profiler History http://go/wvgerrit/16574 Adding Get Stats Method http://go/wvgerrit/16606 Seperating Session Parsing http://go/wvgerrit/16607 Adding get stats method to DRMPlugin http://go/wvgerrit/16608 Fixing Linux Build Failure http://go/wvgerrit/16612 Stop Clearing History http://go/wvgerrit/16613 Accessing profiler information using session id http://go/wvgerrit/16614 Making All Session Subsets of Global Session BUG: 25123303 BUG: 26027857 Change-Id: Ie2422e644aa631871852ea0e461695aeb7060f88
72 lines
1.5 KiB
C++
72 lines
1.5 KiB
C++
// Copyright 2016 Google Inc. All Rights Reserved.
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#ifndef WVCDM_PROFILER_ENTRY_WRITER_H_
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#define WVCDM_PROFILER_ENTRY_WRITER_H_
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#include <stddef.h>
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#include <stdint.h>
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namespace wvcdm {
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namespace oemprofiler {
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class EntryWriter {
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public:
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explicit EntryWriter();
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const uint8_t* GetData() const;
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size_t GetSize() const;
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int WriteU8(uint8_t value);
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int WriteU16(uint16_t value);
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int WriteU32(uint32_t value);
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int WriteU64(uint64_t value);
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// WriteVLV
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// Write a uint 64 value using a variable number of bytes. The number
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// of bytes used is based on the number of bytes required to
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// express the value.
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//
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// The first 3 bits are used to express the number of bytes
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// (ranging 1 to 8 bytes).
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//
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// 1 byte = 0 to 31
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// 2 bytes = 32 to 8191
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// 3 bytes = 8192 to 2097151
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// 4 bytes = 2097152 to 536870911
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// 5 bytes = 536870912 to 137438953471
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// 6 bytes = 137438953472 to 35184372088831
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// 7 bytes = 35184372088832 to 9007199254740991
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// 8 bytes = 9007199254740992 to 2305843009213693951
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int WriteVLV(uint64_t value);
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void Clear();
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size_t GetFreeSpace() const;
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private:
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static const size_t kBufferSize = 32;
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uint8_t bytes_[kBufferSize];
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size_t write_head_;
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int Write(uint64_t v, size_t num_bytes);
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template <typename T>
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int Write(T v);
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uint8_t GetByte(uint64_t value, size_t byte_index);
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// disallow copy and assign
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EntryWriter(const EntryWriter&);
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void operator=(const EntryWriter&);
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};
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} // oemprofiler
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} // wvcdm
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#endif
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