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| 1 // Copyright (c) 2012 The Chromium Authors. All rights reserved. | 1 // Copyright (c) 2012 The Chromium Authors. All rights reserved. |
| 2 // Use of this source code is governed by a BSD-style license that can be | 2 // Use of this source code is governed by a BSD-style license that can be |
| 3 // found in the LICENSE file. | 3 // found in the LICENSE file. |
| 4 | 4 |
| 5 #include "content/browser/speech/chunked_byte_buffer.h" | 5 #include "content/browser/speech/chunked_byte_buffer.h" |
| 6 | 6 |
| 7 #include <algorithm> | 7 #include <algorithm> |
| 8 #include <utility> |
| 8 | 9 |
| 9 #include "base/lazy_instance.h" | 10 #include "base/lazy_instance.h" |
| 10 #include "base/logging.h" | 11 #include "base/logging.h" |
| 11 | 12 |
| 12 namespace { | 13 namespace { |
| 13 | 14 |
| 14 static const size_t kHeaderLength = sizeof(uint32_t); | 15 static const size_t kHeaderLength = sizeof(uint32_t); |
| 15 | 16 |
| 16 static_assert(sizeof(size_t) >= kHeaderLength, | 17 static_assert(sizeof(size_t) >= kHeaderLength, |
| 17 "chunked byte buffer not supported on this architecture"); | 18 "chunked byte buffer not supported on this architecture"); |
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| 104 | 105 |
| 105 scoped_ptr<std::vector<uint8_t>> ChunkedByteBuffer::PopChunk() { | 106 scoped_ptr<std::vector<uint8_t>> ChunkedByteBuffer::PopChunk() { |
| 106 if (chunks_.empty()) | 107 if (chunks_.empty()) |
| 107 return scoped_ptr<std::vector<uint8_t>>(); | 108 return scoped_ptr<std::vector<uint8_t>>(); |
| 108 scoped_ptr<Chunk> chunk(*chunks_.begin()); | 109 scoped_ptr<Chunk> chunk(*chunks_.begin()); |
| 109 chunks_.weak_erase(chunks_.begin()); | 110 chunks_.weak_erase(chunks_.begin()); |
| 110 DCHECK_EQ(chunk->header.size(), kHeaderLength); | 111 DCHECK_EQ(chunk->header.size(), kHeaderLength); |
| 111 DCHECK_EQ(chunk->content->size(), chunk->ExpectedContentLength()); | 112 DCHECK_EQ(chunk->content->size(), chunk->ExpectedContentLength()); |
| 112 total_bytes_stored_ -= chunk->content->size(); | 113 total_bytes_stored_ -= chunk->content->size(); |
| 113 total_bytes_stored_ -= kHeaderLength; | 114 total_bytes_stored_ -= kHeaderLength; |
| 114 return chunk->content.Pass(); | 115 return std::move(chunk->content); |
| 115 } | 116 } |
| 116 | 117 |
| 117 void ChunkedByteBuffer::Clear() { | 118 void ChunkedByteBuffer::Clear() { |
| 118 chunks_.clear(); | 119 chunks_.clear(); |
| 119 partial_chunk_.reset(new Chunk()); | 120 partial_chunk_.reset(new Chunk()); |
| 120 total_bytes_stored_ = 0; | 121 total_bytes_stored_ = 0; |
| 121 } | 122 } |
| 122 | 123 |
| 123 ChunkedByteBuffer::Chunk::Chunk() : content(new std::vector<uint8_t>()) {} | 124 ChunkedByteBuffer::Chunk::Chunk() : content(new std::vector<uint8_t>()) {} |
| 124 | 125 |
| 125 ChunkedByteBuffer::Chunk::~Chunk() { | 126 ChunkedByteBuffer::Chunk::~Chunk() { |
| 126 } | 127 } |
| 127 | 128 |
| 128 size_t ChunkedByteBuffer::Chunk::ExpectedContentLength() const { | 129 size_t ChunkedByteBuffer::Chunk::ExpectedContentLength() const { |
| 129 DCHECK_EQ(header.size(), kHeaderLength); | 130 DCHECK_EQ(header.size(), kHeaderLength); |
| 130 return static_cast<size_t>(ReadBigEndian32(&header[0])); | 131 return static_cast<size_t>(ReadBigEndian32(&header[0])); |
| 131 } | 132 } |
| 132 | 133 |
| 133 } // namespace content | 134 } // namespace content |
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