1 /* 2 * Copyright (C) 2016 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 #ifndef V4L2_CAMERA_HAL_STREAM_FORMAT_H_ 18 #define V4L2_CAMERA_HAL_STREAM_FORMAT_H_ 19 20 #include <cstring> 21 22 #include <linux/videodev2.h> 23 #include "arc/common_types.h" 24 25 namespace v4l2_camera_hal { 26 27 enum FormatCategory { 28 kFormatCategoryRaw, 29 kFormatCategoryStalling, 30 kFormatCategoryNonStalling, 31 kFormatCategoryUnknown, 32 }; 33 34 class StreamFormat { 35 public: 36 StreamFormat(int format, uint32_t width, uint32_t height); 37 StreamFormat(const v4l2_format& format); 38 StreamFormat(const arc::SupportedFormat& format); 39 virtual ~StreamFormat() = default; 40 // Only uint32_t members, use default generated copy and assign. 41 42 void FillFormatRequest(v4l2_format* format) const; 43 FormatCategory Category() const; 44 45 // Accessors. type()46 inline uint32_t type() const { return type_; }; width()47 inline uint32_t width() const { return width_; }; height()48 inline uint32_t height() const { return height_; }; v4l2_pixel_format()49 inline uint32_t v4l2_pixel_format() const { return v4l2_pixel_format_; } bytes_per_line()50 inline uint32_t bytes_per_line() const { return bytes_per_line_; }; 51 52 bool operator==(const StreamFormat& other) const; 53 bool operator!=(const StreamFormat& other) const; 54 55 // HAL <-> V4L2 conversions 56 // Returns 0 for unrecognized. 57 static uint32_t HalToV4L2PixelFormat(int hal_pixel_format); 58 // Returns -1 for unrecognized. 59 static int V4L2ToHalPixelFormat(uint32_t v4l2_pixel_format); 60 61 // ARC++ SupportedFormat Helpers 62 static bool FindBestFitFormat(const arc::SupportedFormats& supported_formats, 63 const arc::SupportedFormats& qualified_formats, 64 uint32_t fourcc, uint32_t width, 65 uint32_t height, 66 arc::SupportedFormat* out_format); 67 static bool FindFormatByResolution(const arc::SupportedFormats& formats, 68 uint32_t width, uint32_t height, 69 arc::SupportedFormat* out_format); 70 static arc::SupportedFormats GetQualifiedFormats( 71 const arc::SupportedFormats& supported_formats); 72 73 private: 74 uint32_t type_; 75 uint32_t v4l2_pixel_format_; 76 uint32_t width_; 77 uint32_t height_; 78 uint32_t bytes_per_line_; 79 }; 80 81 } // namespace v4l2_camera_hal 82 83 #endif // V4L2_CAMERA_HAL_STREAM_FORMAT_H_ 84