media/base/decoder_buffer.cc

   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
   3 // found in the LICENSE file.
   4
   5 #include "media/base/decoder_buffer.h"
   6
   7 #include "base/logging.h"
   8 #include "media/base/buffers.h"
   9 #include "media/base/decrypt_config.h"
  10
  11 namespace media {
  12
  13 DecoderBuffer::DecoderBuffer(int size)
  14     : size_(size),
  15       side_data_size_(0),
  16       is_key_frame_(false) {
  17   Initialize();
  18 }
  19
  20 DecoderBuffer::DecoderBuffer(const uint8* data, int size,
  21                              const uint8* side_data, int side_data_size)
  22     : size_(size),
  23       side_data_size_(side_data_size),
  24       is_key_frame_(false) {
  25   if (!data) {
  26     CHECK_EQ(size_, 0);
  27     CHECK(!side_data);
  28     return;
  29   }
  30
  31   Initialize();
  32   memcpy(data_.get(), data, size_);
  33   if (side_data)
  34     memcpy(side_data_.get(), side_data, side_data_size_);
  35 }
  36
  37 DecoderBuffer::~DecoderBuffer() {}
  38
  39 void DecoderBuffer::Initialize() {
  40   CHECK_GE(size_, 0);
  41   data_.reset(reinterpret_cast<uint8*>(
  42       base::AlignedAlloc(size_ + kPaddingSize, kAlignmentSize)));
  43   memset(data_.get() + size_, 0, kPaddingSize);
  44   if (side_data_size_ > 0) {
  45     side_data_.reset(reinterpret_cast<uint8*>(
  46         base::AlignedAlloc(side_data_size_ + kPaddingSize, kAlignmentSize)));
  47     memset(side_data_.get() + side_data_size_, 0, kPaddingSize);
  48   }
  49   splice_timestamp_ = kNoTimestamp();
  50 }
  51
  52 // static
  53 scoped_refptr<DecoderBuffer> DecoderBuffer::CopyFrom(const uint8* data,
  54                                                      int data_size) {
  55   // If you hit this CHECK you likely have a bug in a demuxer. Go fix it.
  56   CHECK(data);
  57   return make_scoped_refptr(new DecoderBuffer(data, data_size, NULL, 0));
  58 }
  59
  60 // static
  61 scoped_refptr<DecoderBuffer> DecoderBuffer::CopyFrom(const uint8* data,
  62                                                      int data_size,
  63                                                      const uint8* side_data,
  64                                                      int side_data_size) {
  65   // If you hit this CHECK you likely have a bug in a demuxer. Go fix it.
  66   CHECK(data);
  67   CHECK(side_data);
  68   return make_scoped_refptr(new DecoderBuffer(data, data_size,
  69                                               side_data, side_data_size));
  70 }
  71
  72 // static
  73 scoped_refptr<DecoderBuffer> DecoderBuffer::CreateEOSBuffer() {
  74   return make_scoped_refptr(new DecoderBuffer(NULL, 0, NULL, 0));
  75 }
  76
  77 std::string DecoderBuffer::AsHumanReadableString() {
  78   if (end_of_stream()) {
  79     return "end of stream";
  80   }
  81
  82   std::ostringstream s;
  83   s << "timestamp: " << timestamp_.InMicroseconds()
  84     << " duration: " << duration_.InMicroseconds()
  85     << " size: " << size_
  86     << " side_data_size: " << side_data_size_
  87     << " is_key_frame: " << is_key_frame_
  88     << " encrypted: " << (decrypt_config_ != NULL)
  89     << " discard_padding (ms): (" << discard_padding_.first.InMilliseconds()
  90     << ", " << discard_padding_.second.InMilliseconds() << ")";
  91   return s.str();
  92 }
  93
  94 void DecoderBuffer::set_timestamp(base::TimeDelta timestamp) {
  95   DCHECK(!end_of_stream());
  96   timestamp_ = timestamp;
  97 }
  98
  99 }  // namespace media