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author | Sadaf Ebrahimi <sadafebrahimi@google.com> | 2023-08-25 16:27:50 +0000 |
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committer | Sadaf Ebrahimi <sadafebrahimi@google.com> | 2023-08-25 16:27:50 +0000 |
commit | 678702573531f19ae36847a6a07257aaae623fbe (patch) | |
tree | 5d9b28c2e73f9d5e76d9556181a6cf73ac4bd182 /files/include/libyuv/mjpeg_decoder.h | |
parent | 8ef2efc6534659701bc7114e57133207547f60e7 (diff) | |
download | libyuv-678702573531f19ae36847a6a07257aaae623fbe.tar.gz |
Move libyuv/files/ directly under libyuv
Test: TreeHugger
Merged-In: I773d1ae01539cc5d200768b526f10b2922567f72
Change-Id: I4ba1f1e781d7fd3ad96639dfdc08f654e45ae3d3
Diffstat (limited to 'files/include/libyuv/mjpeg_decoder.h')
-rw-r--r-- | files/include/libyuv/mjpeg_decoder.h | 195 |
1 files changed, 0 insertions, 195 deletions
diff --git a/files/include/libyuv/mjpeg_decoder.h b/files/include/libyuv/mjpeg_decoder.h deleted file mode 100644 index 275f8d4c..00000000 --- a/files/include/libyuv/mjpeg_decoder.h +++ /dev/null @@ -1,195 +0,0 @@ -/* - * Copyright 2012 The LibYuv Project Authors. All rights reserved. - * - * Use of this source code is governed by a BSD-style license - * that can be found in the LICENSE file in the root of the source - * tree. An additional intellectual property rights grant can be found - * in the file PATENTS. All contributing project authors may - * be found in the AUTHORS file in the root of the source tree. - */ - -#ifndef INCLUDE_LIBYUV_MJPEG_DECODER_H_ -#define INCLUDE_LIBYUV_MJPEG_DECODER_H_ - -#include "libyuv/basic_types.h" - -#ifdef __cplusplus -// NOTE: For a simplified public API use convert.h MJPGToI420(). - -struct jpeg_common_struct; -struct jpeg_decompress_struct; -struct jpeg_source_mgr; - -namespace libyuv { - -#ifdef __cplusplus -extern "C" { -#endif - -LIBYUV_BOOL ValidateJpeg(const uint8_t* sample, size_t sample_size); - -#ifdef __cplusplus -} // extern "C" -#endif - -static const uint32_t kUnknownDataSize = 0xFFFFFFFF; - -enum JpegSubsamplingType { - kJpegYuv420, - kJpegYuv422, - kJpegYuv444, - kJpegYuv400, - kJpegUnknown -}; - -struct Buffer { - const uint8_t* data; - int len; -}; - -struct BufferVector { - Buffer* buffers; - int len; - int pos; -}; - -struct SetJmpErrorMgr; - -// MJPEG ("Motion JPEG") is a pseudo-standard video codec where the frames are -// simply independent JPEG images with a fixed huffman table (which is omitted). -// It is rarely used in video transmission, but is common as a camera capture -// format, especially in Logitech devices. This class implements a decoder for -// MJPEG frames. -// -// See http://tools.ietf.org/html/rfc2435 -class LIBYUV_API MJpegDecoder { - public: - typedef void (*CallbackFunction)(void* opaque, - const uint8_t* const* data, - const int* strides, - int rows); - - static const int kColorSpaceUnknown; - static const int kColorSpaceGrayscale; - static const int kColorSpaceRgb; - static const int kColorSpaceYCbCr; - static const int kColorSpaceCMYK; - static const int kColorSpaceYCCK; - - MJpegDecoder(); - ~MJpegDecoder(); - - // Loads a new frame, reads its headers, and determines the uncompressed - // image format. - // Returns LIBYUV_TRUE if image looks valid and format is supported. - // If return value is LIBYUV_TRUE, then the values for all the following - // getters are populated. - // src_len is the size of the compressed mjpeg frame in bytes. - LIBYUV_BOOL LoadFrame(const uint8_t* src, size_t src_len); - - // Returns width of the last loaded frame in pixels. - int GetWidth(); - - // Returns height of the last loaded frame in pixels. - int GetHeight(); - - // Returns format of the last loaded frame. The return value is one of the - // kColorSpace* constants. - int GetColorSpace(); - - // Number of color components in the color space. - int GetNumComponents(); - - // Sample factors of the n-th component. - int GetHorizSampFactor(int component); - - int GetVertSampFactor(int component); - - int GetHorizSubSampFactor(int component); - - int GetVertSubSampFactor(int component); - - // Public for testability. - int GetImageScanlinesPerImcuRow(); - - // Public for testability. - int GetComponentScanlinesPerImcuRow(int component); - - // Width of a component in bytes. - int GetComponentWidth(int component); - - // Height of a component. - int GetComponentHeight(int component); - - // Width of a component in bytes with padding for DCTSIZE. Public for testing. - int GetComponentStride(int component); - - // Size of a component in bytes. - int GetComponentSize(int component); - - // Call this after LoadFrame() if you decide you don't want to decode it - // after all. - LIBYUV_BOOL UnloadFrame(); - - // Decodes the entire image into a one-buffer-per-color-component format. - // dst_width must match exactly. dst_height must be <= to image height; if - // less, the image is cropped. "planes" must have size equal to at least - // GetNumComponents() and they must point to non-overlapping buffers of size - // at least GetComponentSize(i). The pointers in planes are incremented - // to point to after the end of the written data. - // TODO(fbarchard): Add dst_x, dst_y to allow specific rect to be decoded. - LIBYUV_BOOL DecodeToBuffers(uint8_t** planes, int dst_width, int dst_height); - - // Decodes the entire image and passes the data via repeated calls to a - // callback function. Each call will get the data for a whole number of - // image scanlines. - // TODO(fbarchard): Add dst_x, dst_y to allow specific rect to be decoded. - LIBYUV_BOOL DecodeToCallback(CallbackFunction fn, - void* opaque, - int dst_width, - int dst_height); - - // The helper function which recognizes the jpeg sub-sampling type. - static JpegSubsamplingType JpegSubsamplingTypeHelper( - int* subsample_x, - int* subsample_y, - int number_of_components); - - private: - void AllocOutputBuffers(int num_outbufs); - void DestroyOutputBuffers(); - - LIBYUV_BOOL StartDecode(); - LIBYUV_BOOL FinishDecode(); - - void SetScanlinePointers(uint8_t** data); - LIBYUV_BOOL DecodeImcuRow(); - - int GetComponentScanlinePadding(int component); - - // A buffer holding the input data for a frame. - Buffer buf_; - BufferVector buf_vec_; - - jpeg_decompress_struct* decompress_struct_; - jpeg_source_mgr* source_mgr_; - SetJmpErrorMgr* error_mgr_; - - // LIBYUV_TRUE iff at least one component has scanline padding. (i.e., - // GetComponentScanlinePadding() != 0.) - LIBYUV_BOOL has_scanline_padding_; - - // Temporaries used to point to scanline outputs. - int num_outbufs_; // Outermost size of all arrays below. - uint8_t*** scanlines_; - int* scanlines_sizes_; - // Temporary buffer used for decoding when we can't decode directly to the - // output buffers. Large enough for just one iMCU row. - uint8_t** databuf_; - int* databuf_strides_; -}; - -} // namespace libyuv - -#endif // __cplusplus -#endif // INCLUDE_LIBYUV_MJPEG_DECODER_H_ |