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| 1 // Copyright (c) 2011 The Chromium Authors. All rights reserved. | 1 // Copyright (c) 2011 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 "media/webm/cluster_builder.h" | 5 #include "media/webm/cluster_builder.h" | 
| 6 | 6 | 
| 7 #include "base/logging.h" | 7 #include "base/logging.h" | 
| 8 #include "media/base/data_buffer.h" | 8 #include "media/base/data_buffer.h" | 
| 9 | 9 | 
| 10 namespace media { | 10 namespace media { | 
| (...skipping 13 matching lines...) Expand all  Loading... | 
| 24 static const uint8 kSimpleBlockHeader[] = { | 24 static const uint8 kSimpleBlockHeader[] = { | 
| 25   0xA3,  // SimpleBlock ID | 25   0xA3,  // SimpleBlock ID | 
| 26   0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,  // SimpleBlock(size = 0) | 26   0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,  // SimpleBlock(size = 0) | 
| 27 }; | 27 }; | 
| 28 | 28 | 
| 29 const int kSimpleBlockHeaderSize = sizeof(kSimpleBlockHeader); | 29 const int kSimpleBlockHeaderSize = sizeof(kSimpleBlockHeader); | 
| 30 const int kSimpleBlockSizeOffset = 1; | 30 const int kSimpleBlockSizeOffset = 1; | 
| 31 | 31 | 
| 32 const int kInitialBufferSize = 32768; | 32 const int kInitialBufferSize = 32768; | 
| 33 | 33 | 
| 34 Cluster::Cluster(const uint8* data, int size) : data_(data), size_(size) {} | 34 Cluster::Cluster(scoped_array<uint8> data, int size) | 
|  | 35     : data_(data.Pass()), size_(size) {} | 
| 35 Cluster::~Cluster() {} | 36 Cluster::~Cluster() {} | 
| 36 | 37 | 
| 37 ClusterBuilder::ClusterBuilder() { Reset(); } | 38 ClusterBuilder::ClusterBuilder() { Reset(); } | 
| 38 ClusterBuilder::~ClusterBuilder() {} | 39 ClusterBuilder::~ClusterBuilder() {} | 
| 39 | 40 | 
| 40 void ClusterBuilder::SetClusterTimecode(int64 cluster_timecode) { | 41 void ClusterBuilder::SetClusterTimecode(int64 cluster_timecode) { | 
| 41   DCHECK_EQ(cluster_timecode_, -1); | 42   DCHECK_EQ(cluster_timecode_, -1); | 
| 42 | 43 | 
| 43   cluster_timecode_ = cluster_timecode; | 44   cluster_timecode_ = cluster_timecode; | 
| 44 | 45 | 
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| 82   memcpy(buf + 4, data, size); | 83   memcpy(buf + 4, data, size); | 
| 83 | 84 | 
| 84   bytes_used_ += bytes_needed; | 85   bytes_used_ += bytes_needed; | 
| 85 } | 86 } | 
| 86 | 87 | 
| 87 Cluster* ClusterBuilder::Finish() { | 88 Cluster* ClusterBuilder::Finish() { | 
| 88   DCHECK_NE(cluster_timecode_, -1); | 89   DCHECK_NE(cluster_timecode_, -1); | 
| 89 | 90 | 
| 90   UpdateUInt64(kClusterSizeOffset, bytes_used_ - (kClusterSizeOffset + 8)); | 91   UpdateUInt64(kClusterSizeOffset, bytes_used_ - (kClusterSizeOffset + 8)); | 
| 91 | 92 | 
| 92   scoped_ptr<Cluster> ret(new Cluster(buffer_.release(), bytes_used_)); | 93   scoped_ptr<Cluster> ret(new Cluster(buffer_.Pass(), bytes_used_)); | 
| 93   Reset(); | 94   Reset(); | 
| 94   return ret.release(); | 95   return ret.release(); | 
| 95 } | 96 } | 
| 96 | 97 | 
| 97 void ClusterBuilder::Reset() { | 98 void ClusterBuilder::Reset() { | 
| 98   buffer_size_ = kInitialBufferSize; | 99   buffer_size_ = kInitialBufferSize; | 
| 99   buffer_.reset(new uint8[buffer_size_]); | 100   buffer_.reset(new uint8[buffer_size_]); | 
| 100   memcpy(buffer_.get(), kClusterHeader, kClusterHeaderSize); | 101   memcpy(buffer_.get(), kClusterHeader, kClusterHeaderSize); | 
| 101   bytes_used_ = kClusterHeaderSize; | 102   bytes_used_ = kClusterHeaderSize; | 
| 102   cluster_timecode_ = -1; | 103   cluster_timecode_ = -1; | 
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| 120   uint8* buf = buffer_.get() + offset; | 121   uint8* buf = buffer_.get() + offset; | 
| 121 | 122 | 
| 122   // Fill the last 7 bytes of size field in big-endian order. | 123   // Fill the last 7 bytes of size field in big-endian order. | 
| 123   for (int i = 7; i > 0; i--) { | 124   for (int i = 7; i > 0; i--) { | 
| 124     buf[i] = value & 0xff; | 125     buf[i] = value & 0xff; | 
| 125     value >>= 8; | 126     value >>= 8; | 
| 126   } | 127   } | 
| 127 } | 128 } | 
| 128 | 129 | 
| 129 }  // namespace media | 130 }  // namespace media | 
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