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| 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 | |
| 3 // found in the LICENSE file. | |
| 4 | |
| 5 #include "chrome/gpu/media/fake_gl_video_decode_engine.h" | |
| 6 | |
| 7 #include "media/base/limits.h" | |
| 8 #include "media/base/video_frame.h" | |
| 9 #include "media/video/video_decode_context.h" | |
| 10 | |
| 11 FakeGlVideoDecodeEngine::FakeGlVideoDecodeEngine() | |
| 12 : width_(0), | |
| 13 height_(0), | |
| 14 handler_(NULL), | |
| 15 context_(NULL) { | |
| 16 } | |
| 17 | |
| 18 FakeGlVideoDecodeEngine::~FakeGlVideoDecodeEngine() { | |
| 19 } | |
| 20 | |
| 21 void FakeGlVideoDecodeEngine::Initialize( | |
| 22 MessageLoop* message_loop, | |
| 23 media::VideoDecodeEngine::EventHandler* event_handler, | |
| 24 media::VideoDecodeContext* context, | |
| 25 const media::VideoCodecConfig& config) { | |
| 26 handler_ = event_handler; | |
| 27 context_ = context; | |
| 28 width_ = config.width(); | |
| 29 height_ = config.height(); | |
| 30 | |
| 31 // Create an internal VideoFrame that we can write to. This is going to be | |
| 32 // uploaded through VideoDecodeContext. | |
| 33 media::VideoFrame::CreateFrame( | |
| 34 media::VideoFrame::RGBA, width_, height_, base::TimeDelta(), | |
| 35 base::TimeDelta(), &internal_frame_); | |
| 36 memset(internal_frame_->data(media::VideoFrame::kRGBPlane), 0, | |
| 37 height_ * internal_frame_->stride(media::VideoFrame::kRGBPlane)); | |
| 38 | |
| 39 // Use VideoDecodeContext to allocate VideoFrame that can be consumed by | |
| 40 // external body. | |
| 41 // TODO(hclam): It is horrible to use constants everywhere in the code! | |
| 42 // The number of frames come from VideoRendererBase in the renderer, this is | |
| 43 // horrible! | |
| 44 context_->AllocateVideoFrames( | |
| 45 media::Limits::kMaxVideoFrames, width_, height_, media::VideoFrame::RGBA, | |
| 46 &external_frames_, | |
| 47 NewRunnableMethod(this, | |
| 48 &FakeGlVideoDecodeEngine::AllocationCompleteTask)); | |
| 49 } | |
| 50 | |
| 51 void FakeGlVideoDecodeEngine::AllocationCompleteTask() { | |
| 52 DCHECK(media::Limits::kMaxVideoFrames == external_frames_.size()); | |
| 53 DCHECK_EQ(media::VideoFrame::TYPE_GL_TEXTURE, external_frames_[0]->type()); | |
| 54 | |
| 55 media::VideoCodecInfo info; | |
| 56 info.success = true; | |
| 57 info.provides_buffers = true; | |
| 58 info.stream_info.surface_format = media::VideoFrame::RGBA; | |
| 59 info.stream_info.surface_type = media::VideoFrame::TYPE_GL_TEXTURE; | |
| 60 info.stream_info.surface_width = width_; | |
| 61 info.stream_info.surface_height = height_; | |
| 62 handler_->OnInitializeComplete(info); | |
| 63 } | |
| 64 | |
| 65 void FakeGlVideoDecodeEngine::Uninitialize() { | |
| 66 handler_->OnUninitializeComplete(); | |
| 67 } | |
| 68 | |
| 69 void FakeGlVideoDecodeEngine::Flush() { | |
| 70 handler_->OnFlushComplete(); | |
| 71 } | |
| 72 | |
| 73 void FakeGlVideoDecodeEngine::Seek() { | |
| 74 // TODO(hclam): This is a big hack to continue playing because we need to | |
| 75 // *push* decoded frames to downstream. The model used in VideoRendererBase | |
| 76 // to wait for *push* is flawed. | |
| 77 for (size_t i = 0; i < external_frames_.size(); ++i) | |
| 78 handler_->ConsumeVideoFrame(external_frames_[i], dummy_stats_); | |
| 79 handler_->OnSeekComplete(); | |
| 80 } | |
| 81 | |
| 82 void FakeGlVideoDecodeEngine::ConsumeVideoSample( | |
| 83 scoped_refptr<media::Buffer> sample) { | |
| 84 DCHECK(!pending_frames_.empty()); | |
| 85 scoped_refptr<media::VideoFrame> frame = pending_frames_.front(); | |
| 86 pending_frames_.pop(); | |
| 87 | |
| 88 frame->SetDuration(sample->GetDuration()); | |
| 89 frame->SetTimestamp(sample->GetTimestamp()); | |
| 90 | |
| 91 // Generate a pattern to the internal frame and then uploads it. | |
| 92 int size = width_ * height_ * 4; | |
| 93 scoped_array<uint8> buffer(new uint8[size]); | |
| 94 memset(buffer.get(), 255, size); | |
| 95 | |
| 96 uint8* row = internal_frame_->data(media::VideoFrame::kRGBPlane); | |
| 97 static int seed = 0; | |
| 98 | |
| 99 for (int y = 0; y < height_; ++y) { | |
| 100 int offset = y % 3; | |
| 101 for (int x = 0; x < width_; ++x) { | |
| 102 row[x * 4 + offset + 1] = seed++; | |
| 103 seed &= 255; | |
| 104 } | |
| 105 row += width_ * 4; | |
| 106 } | |
| 107 ++seed; | |
| 108 | |
| 109 // After we have filled the content upload the internal frame to the | |
| 110 // VideoFrame allocated through VideoDecodeContext. | |
| 111 context_->ConvertToVideoFrame( | |
| 112 internal_frame_, frame, | |
| 113 NewRunnableMethod(this, &FakeGlVideoDecodeEngine::UploadCompleteTask, | |
| 114 frame)); | |
| 115 } | |
| 116 | |
| 117 void FakeGlVideoDecodeEngine::ProduceVideoFrame( | |
| 118 scoped_refptr<media::VideoFrame> frame) { | |
| 119 // Enqueue the frame to the pending queue. | |
| 120 pending_frames_.push(frame); | |
| 121 | |
| 122 // Fake that we need some buffer. | |
| 123 handler_->ProduceVideoSample(NULL); | |
| 124 } | |
| 125 | |
| 126 void FakeGlVideoDecodeEngine::UploadCompleteTask( | |
| 127 scoped_refptr<media::VideoFrame> frame) { | |
| 128 // |frame| is the upload target. We can immediately send this frame out. | |
| 129 handler_->ConsumeVideoFrame(frame, dummy_stats_); | |
| 130 } | |
| 131 | |
| 132 DISABLE_RUNNABLE_METHOD_REFCOUNT(FakeGlVideoDecodeEngine); | |
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