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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/filters/jpeg_parser.h" | |
sandersd (OOO until July 31)
2017/03/15 18:55:52
Remove?
chfremer
2017/03/15 19:22:23
Done.
| |
11 #include "media/gpu/shared_memory_region.h" | |
12 | |
13 namespace media { | |
14 | |
15 FakeJpegDecodeAccelerator::FakeJpegDecodeAccelerator( | |
16 const scoped_refptr<base::SingleThreadTaskRunner>& io_task_runner) | |
17 : client_task_runner_(base::ThreadTaskRunnerHandle::Get()), | |
18 io_task_runner_(std::move(io_task_runner)), | |
19 decoder_thread_("FakeJpegDecoderThread"), | |
20 weak_factory_(this) {} | |
21 | |
22 FakeJpegDecodeAccelerator::~FakeJpegDecodeAccelerator() { | |
23 DCHECK(client_task_runner_->BelongsToCurrentThread()); | |
24 } | |
25 | |
26 bool FakeJpegDecodeAccelerator::Initialize( | |
27 JpegDecodeAccelerator::Client* client) { | |
28 DCHECK(client_task_runner_->BelongsToCurrentThread()); | |
29 client_ = client; | |
30 | |
31 if (!decoder_thread_.Start()) { | |
32 DLOG(ERROR) << "Failed to start decoding thread."; | |
33 return false; | |
34 } | |
35 decoder_task_runner_ = decoder_thread_.task_runner(); | |
36 | |
37 return true; | |
38 } | |
39 | |
40 void FakeJpegDecodeAccelerator::Decode( | |
41 const BitstreamBuffer& bitstream_buffer, | |
42 const scoped_refptr<VideoFrame>& video_frame) { | |
43 DCHECK(io_task_runner_->BelongsToCurrentThread()); | |
44 | |
45 // SharedMemoryRegion will take over the |bitstream_buffer.handle()|. | |
46 std::unique_ptr<SharedMemoryRegion> src_shm( | |
47 new SharedMemoryRegion(bitstream_buffer, true)); | |
48 if (!src_shm->Map()) { | |
49 DLOG(ERROR) << "Unable to map shared memory in FakeJpegDecodeAccelerator"; | |
50 NotifyError(bitstream_buffer.id(), JpegDecodeAccelerator::UNREADABLE_INPUT); | |
51 return; | |
52 } | |
53 | |
54 // Unretained |this| is safe because |this| owns |decoder_thread_|. | |
55 decoder_task_runner_->PostTask( | |
56 FROM_HERE, base::Bind(&FakeJpegDecodeAccelerator::DecodeOnDecoderThread, | |
57 base::Unretained(this), bitstream_buffer, | |
58 video_frame, base::Passed(&src_shm))); | |
59 } | |
60 | |
61 void FakeJpegDecodeAccelerator::DecodeOnDecoderThread( | |
62 const BitstreamBuffer& bitstream_buffer, | |
63 const scoped_refptr<VideoFrame>& video_frame, | |
64 std::unique_ptr<SharedMemoryRegion> src_shm) { | |
65 DCHECK(decoder_task_runner_->BelongsToCurrentThread()); | |
66 | |
67 // Do not actually decode the Jpeg data. | |
68 // Instead, just fill the output buffer with zeros. | |
69 size_t allocation_size = | |
70 VideoFrame::AllocationSize(PIXEL_FORMAT_I420, video_frame->coded_size()); | |
71 memset(video_frame->data(0), 0, allocation_size); | |
72 | |
73 client_task_runner_->PostTask( | |
74 FROM_HERE, | |
75 base::Bind(&FakeJpegDecodeAccelerator::OnDecodeDoneOnClientThread, | |
76 weak_factory_.GetWeakPtr(), bitstream_buffer.id())); | |
77 } | |
78 | |
79 bool FakeJpegDecodeAccelerator::IsSupported() { | |
80 return true; | |
81 } | |
82 | |
83 void FakeJpegDecodeAccelerator::NotifyError(int32_t bitstream_buffer_id, | |
84 Error error) { | |
85 client_task_runner_->PostTask( | |
86 FROM_HERE, | |
87 base::Bind(&FakeJpegDecodeAccelerator::NotifyErrorOnClientThread, | |
88 weak_factory_.GetWeakPtr(), bitstream_buffer_id, error)); | |
89 } | |
90 | |
91 void FakeJpegDecodeAccelerator::NotifyErrorOnClientThread( | |
92 int32_t bitstream_buffer_id, | |
93 Error error) { | |
94 DCHECK(client_task_runner_->BelongsToCurrentThread()); | |
95 client_->NotifyError(bitstream_buffer_id, error); | |
96 } | |
97 | |
98 void FakeJpegDecodeAccelerator::OnDecodeDoneOnClientThread( | |
99 int32_t input_buffer_id) { | |
100 DCHECK(client_task_runner_->BelongsToCurrentThread()); | |
101 client_->VideoFrameReady(input_buffer_id); | |
102 } | |
103 | |
104 } // namespace media | |
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