1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
|
// Copyright 2019 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef MEDIA_GPU_VAAPI_VAAPI_JPEG_DECODER_H_
#define MEDIA_GPU_VAAPI_VAAPI_JPEG_DECODER_H_
#include <stdint.h>
#include <memory>
#include "base/callback_forward.h"
#include "base/containers/span.h"
#include "base/macros.h"
#include "base/memory/scoped_refptr.h"
#include "ui/gfx/geometry/size.h"
// This data type is defined in va/va.h using typedef, reproduced here.
typedef unsigned int VASurfaceID;
namespace media {
struct JpegFrameHeader;
class ScopedVAImage;
class VASurface;
class VaapiWrapper;
enum class VaapiJpegDecodeStatus : uint32_t {
kSuccess,
kParseJpegFailed,
kUnsupportedJpeg,
kUnsupportedSubsampling,
kSurfaceCreationFailed,
kSubmitPicParamsFailed,
kSubmitIQMatrixFailed,
kSubmitHuffmanFailed,
kSubmitSliceParamsFailed,
kSubmitSliceDataFailed,
kExecuteDecodeFailed,
kUnsupportedSurfaceFormat,
kCannotGetImage,
kInvalidState,
};
constexpr unsigned int kInvalidVaRtFormat = 0u;
// Returns the internal format required for a JPEG image given its parsed
// |frame_header|. If the image's subsampling format is not one of 4:2:0, 4:2:2,
// or 4:4:4, returns kInvalidVaRtFormat.
unsigned int VaSurfaceFormatForJpeg(const JpegFrameHeader& frame_header);
// Encapsulates a VaapiWrapper for the purpose of performing
// hardware-accelerated JPEG decodes. Objects of this class are not thread-safe,
// but they are also not thread-affine, i.e., the caller is free to call the
// methods on any thread, but calls must be synchronized externally.
class VaapiJpegDecoder final {
public:
VaapiJpegDecoder();
~VaapiJpegDecoder();
// Initializes |vaapi_wrapper_| in kDecode mode with VAProfileJPEGBaseline
// profile and |error_uma_cb| for error reporting.
bool Initialize(const base::RepeatingClosure& error_uma_cb);
// Decodes a JPEG picture. It will fill VA-API parameters and call the
// corresponding VA-API methods according to the JPEG in |encoded_image|.
// The image will be decoded into an internally allocated VA surface. It
// will be returned as an unowned VASurface, which remains valid until the
// next Decode() call or destruction of this class. Returns nullptr on
// failure and sets *|status| to the reason for failure.
scoped_refptr<VASurface> Decode(base::span<const uint8_t> encoded_image,
VaapiJpegDecodeStatus* status);
// Get the decoded data from the last Decode() call as a ScopedVAImage. The
// VAImage's format will be either |preferred_image_fourcc| if the conversion
// from the internal format is supported or a fallback FOURCC (see
// VaapiWrapper::GetJpegDecodeSuitableImageFourCC() for details). Returns
// nullptr on failure and sets *|status| to the reason for failure.
std::unique_ptr<ScopedVAImage> GetImage(uint32_t preferred_image_fourcc,
VaapiJpegDecodeStatus* status);
private:
scoped_refptr<VaapiWrapper> vaapi_wrapper_;
// The current VA surface for decoding.
VASurfaceID va_surface_id_;
// The coded size associated with |va_surface_id_|.
gfx::Size coded_size_;
// The VA RT format associated with |va_surface_id_|.
unsigned int va_rt_format_;
DISALLOW_COPY_AND_ASSIGN(VaapiJpegDecoder);
};
} // namespace media
#endif // MEDIA_GPU_VAAPI_VAAPI_JPEG_DECODER_H_
|
