media/cast/sender/fake_software_video_encoder.cc

   1 // Copyright 2014 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/cast/sender/fake_software_video_encoder.h"
   6
   7 #include "base/json/json_writer.h"
   8 #include "base/values.h"
   9 #include "media/base/video_frame.h"
  10 #include "media/cast/net/cast_transport_config.h"
  11
  12 #ifndef OFFICIAL_BUILD
  13
  14 namespace media {
  15 namespace cast {
  16
  17 FakeSoftwareVideoEncoder::FakeSoftwareVideoEncoder(
  18     const VideoSenderConfig& video_config)
  19     : video_config_(video_config),
  20       next_frame_is_key_(true),
  21       frame_id_(0),
  22       frame_id_to_reference_(0),
  23       frame_size_(0) {
  24 }
  25
  26 FakeSoftwareVideoEncoder::~FakeSoftwareVideoEncoder() {}
  27
  28 void FakeSoftwareVideoEncoder::Initialize() {}
  29
  30 void FakeSoftwareVideoEncoder::Encode(
  31     const scoped_refptr<media::VideoFrame>& video_frame,
  32     const base::TimeTicks& reference_time,
  33     EncodedFrame* encoded_frame) {
  34   DCHECK(encoded_frame);
  35
  36   encoded_frame->frame_id = frame_id_++;
  37   if (next_frame_is_key_) {
  38     encoded_frame->dependency = EncodedFrame::KEY;
  39     encoded_frame->referenced_frame_id = encoded_frame->frame_id;
  40     next_frame_is_key_ = false;
  41   } else {
  42     encoded_frame->dependency = EncodedFrame::DEPENDENT;
  43     encoded_frame->referenced_frame_id = encoded_frame->frame_id - 1;
  44   }
  45   encoded_frame->rtp_timestamp =
  46       TimeDeltaToRtpDelta(video_frame->timestamp(), kVideoFrequency);
  47   encoded_frame->reference_time = reference_time;
  48
  49   base::DictionaryValue values;
  50   values.SetBoolean("key",
  51                     encoded_frame->dependency == EncodedFrame::KEY);
  52   values.SetInteger("ref", encoded_frame->referenced_frame_id);
  53   values.SetInteger("id", encoded_frame->frame_id);
  54   values.SetInteger("size", frame_size_);
  55   base::JSONWriter::Write(&values, &encoded_frame->data);
  56   encoded_frame->data.resize(
  57       std::max<size_t>(encoded_frame->data.size(), frame_size_), ' ');
  58 }
  59
  60 void FakeSoftwareVideoEncoder::UpdateRates(uint32 new_bitrate) {
  61   frame_size_ = new_bitrate / video_config_.max_frame_rate / 8;
  62 }
  63
  64 void FakeSoftwareVideoEncoder::GenerateKeyFrame() {
  65   next_frame_is_key_ = true;
  66 }
  67
  68 void FakeSoftwareVideoEncoder::LatestFrameIdToReference(uint32 frame_id) {
  69   frame_id_to_reference_ = frame_id;
  70 }
  71
  72 }  // namespace cast
  73 }  // namespace media
  74
  75 #endif