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Side by Side Diff: media/filters/jpeg_parser.h

Issue 1016773002: MJPEG acceleration for video capture using VAAPI (Closed) Base URL: https://chromium.googlesource.com/chromium/src.git@master
Patch Set: fix coded size, shm handle Created 5 years, 9 months ago
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1 // Copyright 2015 The Chromium Authors. All rights reserved. 1 // Copyright 2015 The Chromium Authors. All rights reserved.
2 // Use of this source code is governed by a BSD-style license that can be 2 // Use of this source code is governed by a BSD-style license that can be
3 // found in the LICENSE file. 3 // found in the LICENSE file.
4 // 4 //
5 #ifndef MEDIA_FILTERS_JPEG_PARSER_H_ 5 #ifndef MEDIA_FILTERS_JPEG_PARSER_H_
6 #define MEDIA_FILTERS_JPEG_PARSER_H_ 6 #define MEDIA_FILTERS_JPEG_PARSER_H_
7 7
8 #include <stddef.h> 8 #include <stddef.h>
9 #include <stdint.h> 9 #include <stdint.h>
10 #include "media/base/media_export.h" 10 #include "media/base/media_export.h"
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33 uint8_t id; 33 uint8_t id;
34 uint8_t horizontal_sampling_factor; 34 uint8_t horizontal_sampling_factor;
35 uint8_t vertical_sampling_factor; 35 uint8_t vertical_sampling_factor;
36 uint8_t quantization_table_selector; 36 uint8_t quantization_table_selector;
37 }; 37 };
38 38
39 // Parsing result of a JPEG SOF marker. 39 // Parsing result of a JPEG SOF marker.
40 struct JpegFrameHeader { 40 struct JpegFrameHeader {
41 uint16_t visible_width; 41 uint16_t visible_width;
42 uint16_t visible_height; 42 uint16_t visible_height;
43 uint16_t coded_width;
44 uint16_t coded_height;
43 uint8_t num_components; 45 uint8_t num_components;
44 JpegComponent components[kJpegMaxComponents]; 46 JpegComponent components[kJpegMaxComponents];
45 }; 47 };
46 48
47 // Parsing result of JPEG SOS marker. 49 // Parsing result of JPEG SOS marker.
48 struct JpegScanHeader { 50 struct JpegScanHeader {
49 uint8_t num_components; 51 uint8_t num_components;
50 struct Component { 52 struct Component {
51 uint8_t component_selector; 53 uint8_t component_selector;
52 uint8_t dc_selector; 54 uint8_t dc_selector;
(...skipping 19 matching lines...) Expand all
72 // baseline sequential process. For explanations of each struct and its 74 // baseline sequential process. For explanations of each struct and its
73 // members, see JPEG specification at 75 // members, see JPEG specification at
74 // http://www.w3.org/Graphics/JPEG/itu-t81.pdf. 76 // http://www.w3.org/Graphics/JPEG/itu-t81.pdf.
75 MEDIA_EXPORT bool ParseJpegPicture(const uint8_t* buffer, 77 MEDIA_EXPORT bool ParseJpegPicture(const uint8_t* buffer,
76 size_t length, 78 size_t length,
77 JpegParseResult* result); 79 JpegParseResult* result);
78 80
79 } // namespace media 81 } // namespace media
80 82
81 #endif // MEDIA_FILTERS_JPEG_PARSER_H_ 83 #endif // MEDIA_FILTERS_JPEG_PARSER_H_
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