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1 // Copyright 2017 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/gpu/fake_jpeg_decode_accelerator.h" | |
6 | |
7 #include "base/bind.h" | |
8 #include "base/single_thread_task_runner.h" | |
9 #include "base/threading/thread_task_runner_handle.h" | |
10 #include "media/gpu/shared_memory_region.h" | |
11 | |
12 namespace media { | |
13 | |
14 FakeJpegDecodeAccelerator::FakeJpegDecodeAccelerator( | |
15 const scoped_refptr<base::SingleThreadTaskRunner>& io_task_runner) | |
16 : client_task_runner_(base::ThreadTaskRunnerHandle::Get()), | |
17 io_task_runner_(std::move(io_task_runner)), | |
18 decoder_thread_("FakeJpegDecoderThread"), | |
19 weak_factory_(this) {} | |
20 | |
21 FakeJpegDecodeAccelerator::~FakeJpegDecodeAccelerator() { | |
22 DCHECK(client_task_runner_->BelongsToCurrentThread()); | |
23 } | |
24 | |
25 bool FakeJpegDecodeAccelerator::Initialize( | |
26 JpegDecodeAccelerator::Client* client) { | |
27 DCHECK(client_task_runner_->BelongsToCurrentThread()); | |
28 client_ = client; | |
29 | |
30 if (!decoder_thread_.Start()) { | |
31 DLOG(ERROR) << "Failed to start decoding thread."; | |
32 return false; | |
33 } | |
34 decoder_task_runner_ = decoder_thread_.task_runner(); | |
35 | |
36 return true; | |
37 } | |
38 | |
39 void FakeJpegDecodeAccelerator::Decode( | |
40 const BitstreamBuffer& bitstream_buffer, | |
41 const scoped_refptr<VideoFrame>& video_frame) { | |
42 DCHECK(io_task_runner_->BelongsToCurrentThread()); | |
43 | |
44 // SharedMemoryRegion will take over the |bitstream_buffer.handle()|. | |
45 std::unique_ptr<SharedMemoryRegion> src_shm( | |
46 new SharedMemoryRegion(bitstream_buffer, true)); | |
47 if (!src_shm->Map()) { | |
48 DLOG(ERROR) << "Unable to map shared memory in FakeJpegDecodeAccelerator"; | |
49 NotifyError(bitstream_buffer.id(), JpegDecodeAccelerator::UNREADABLE_INPUT); | |
50 return; | |
51 } | |
52 | |
53 // Unretained |this| is safe because |this| owns |decoder_thread_|. | |
54 decoder_task_runner_->PostTask( | |
55 FROM_HERE, base::Bind(&FakeJpegDecodeAccelerator::DecodeOnDecoderThread, | |
56 base::Unretained(this), bitstream_buffer, | |
57 video_frame, base::Passed(&src_shm))); | |
58 } | |
59 | |
60 void FakeJpegDecodeAccelerator::DecodeOnDecoderThread( | |
61 const BitstreamBuffer& bitstream_buffer, | |
62 const scoped_refptr<VideoFrame>& video_frame, | |
63 std::unique_ptr<SharedMemoryRegion> src_shm) { | |
64 DCHECK(decoder_task_runner_->BelongsToCurrentThread()); | |
65 | |
66 // Do not actually decode the Jpeg data. | |
67 // Instead, just fill the output buffer with zeros. | |
68 size_t allocation_size = | |
69 VideoFrame::AllocationSize(PIXEL_FORMAT_I420, video_frame->coded_size()); | |
70 memset(video_frame->data(0), 0, allocation_size); | |
71 | |
72 client_task_runner_->PostTask( | |
73 FROM_HERE, | |
74 base::Bind(&FakeJpegDecodeAccelerator::OnDecodeDoneOnClientThread, | |
75 weak_factory_.GetWeakPtr(), bitstream_buffer.id())); | |
76 } | |
77 | |
78 bool FakeJpegDecodeAccelerator::IsSupported() { | |
79 return true; | |
80 } | |
81 | |
82 void FakeJpegDecodeAccelerator::NotifyError(int32_t bitstream_buffer_id, | |
83 Error error) { | |
84 client_task_runner_->PostTask( | |
85 FROM_HERE, | |
86 base::Bind(&FakeJpegDecodeAccelerator::NotifyErrorOnClientThread, | |
87 weak_factory_.GetWeakPtr(), bitstream_buffer_id, error)); | |
88 } | |
89 | |
90 void FakeJpegDecodeAccelerator::NotifyErrorOnClientThread( | |
91 int32_t bitstream_buffer_id, | |
92 Error error) { | |
93 DCHECK(client_task_runner_->BelongsToCurrentThread()); | |
94 client_->NotifyError(bitstream_buffer_id, error); | |
95 } | |
96 | |
97 void FakeJpegDecodeAccelerator::OnDecodeDoneOnClientThread( | |
98 int32_t input_buffer_id) { | |
99 DCHECK(client_task_runner_->BelongsToCurrentThread()); | |
100 client_->VideoFrameReady(input_buffer_id); | |
101 } | |
102 | |
103 } // namespace media | |
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