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Diffstat (limited to 'drivers/webpold/encode.h')
| -rw-r--r-- | drivers/webpold/encode.h | 463 |
1 files changed, 0 insertions, 463 deletions
diff --git a/drivers/webpold/encode.h b/drivers/webpold/encode.h deleted file mode 100644 index 2e37cfabe7..0000000000 --- a/drivers/webpold/encode.h +++ /dev/null @@ -1,463 +0,0 @@ -// Copyright 2011 Google Inc. All Rights Reserved. -// -// This code is licensed under the same terms as WebM: -// Software License Agreement: http://www.webmproject.org/license/software/ -// Additional IP Rights Grant: http://www.webmproject.org/license/additional/ -// ----------------------------------------------------------------------------- -// -// WebP encoder: main interface -// -// Author: Skal (pascal.massimino@gmail.com) - -#ifndef WEBP_WEBP_ENCODE_H_ -#define WEBP_WEBP_ENCODE_H_ - -#include "./types.h" - -#if defined(__cplusplus) || defined(c_plusplus) -extern "C" { -#endif - -#define WEBP_ENCODER_ABI_VERSION 0x0200 // MAJOR(8b) + MINOR(8b) - -// Return the encoder's version number, packed in hexadecimal using 8bits for -// each of major/minor/revision. E.g: v2.5.7 is 0x020507. -WEBP_EXTERN(int) WebPGetEncoderVersion(void); - -//------------------------------------------------------------------------------ -// One-stop-shop call! No questions asked: - -// Returns the size of the compressed data (pointed to by *output), or 0 if -// an error occurred. The compressed data must be released by the caller -// using the call 'free(*output)'. -// These functions compress using the lossy format, and the quality_factor -// can go from 0 (smaller output, lower quality) to 100 (best quality, -// larger output). -WEBP_EXTERN(size_t) WebPEncodeRGB(const uint8_t* rgb, - int width, int height, int stride, - float quality_factor, uint8_t** output); -WEBP_EXTERN(size_t) WebPEncodeBGR(const uint8_t* bgr, - int width, int height, int stride, - float quality_factor, uint8_t** output); -WEBP_EXTERN(size_t) WebPEncodeRGBA(const uint8_t* rgba, - int width, int height, int stride, - float quality_factor, uint8_t** output); -WEBP_EXTERN(size_t) WebPEncodeBGRA(const uint8_t* bgra, - int width, int height, int stride, - float quality_factor, uint8_t** output); - -// These functions are the equivalent of the above, but compressing in a -// lossless manner. Files are usually larger than lossy format, but will -// not suffer any compression loss. -WEBP_EXTERN(size_t) WebPEncodeLosslessRGB(const uint8_t* rgb, - int width, int height, int stride, - uint8_t** output); -WEBP_EXTERN(size_t) WebPEncodeLosslessBGR(const uint8_t* bgr, - int width, int height, int stride, - uint8_t** output); -WEBP_EXTERN(size_t) WebPEncodeLosslessRGBA(const uint8_t* rgba, - int width, int height, int stride, - uint8_t** output); -WEBP_EXTERN(size_t) WebPEncodeLosslessBGRA(const uint8_t* bgra, - int width, int height, int stride, - uint8_t** output); - -//------------------------------------------------------------------------------ -// Coding parameters - -// Image characteristics hint for the underlying encoder. -typedef enum { - WEBP_HINT_DEFAULT = 0, // default preset. - WEBP_HINT_PICTURE, // digital picture, like portrait, inner shot - WEBP_HINT_PHOTO, // outdoor photograph, with natural lighting - WEBP_HINT_GRAPH, // Discrete tone image (graph, map-tile etc). - WEBP_HINT_LAST -} WebPImageHint; - -typedef struct { - int lossless; // Lossless encoding (0=lossy(default), 1=lossless). - float quality; // between 0 (smallest file) and 100 (biggest) - int method; // quality/speed trade-off (0=fast, 6=slower-better) - - WebPImageHint image_hint; // Hint for image type (lossless only for now). - - // Parameters related to lossy compression only: - int target_size; // if non-zero, set the desired target size in bytes. - // Takes precedence over the 'compression' parameter. - float target_PSNR; // if non-zero, specifies the minimal distortion to - // try to achieve. Takes precedence over target_size. - int segments; // maximum number of segments to use, in [1..4] - int sns_strength; // Spatial Noise Shaping. 0=off, 100=maximum. - int filter_strength; // range: [0 = off .. 100 = strongest] - int filter_sharpness; // range: [0 = off .. 7 = least sharp] - int filter_type; // filtering type: 0 = simple, 1 = strong (only used - // if filter_strength > 0 or autofilter > 0) - int autofilter; // Auto adjust filter's strength [0 = off, 1 = on] - int alpha_compression; // Algorithm for encoding the alpha plane (0 = none, - // 1 = compressed with WebP lossless). Default is 1. - int alpha_filtering; // Predictive filtering method for alpha plane. - // 0: none, 1: fast, 2: best. Default if 1. - int alpha_quality; // Between 0 (smallest size) and 100 (lossless). - // Default is 100. - int pass; // number of entropy-analysis passes (in [1..10]). - - int show_compressed; // if true, export the compressed picture back. - // In-loop filtering is not applied. - int preprocessing; // preprocessing filter (0=none, 1=segment-smooth) - int partitions; // log2(number of token partitions) in [0..3]. Default - // is set to 0 for easier progressive decoding. - int partition_limit; // quality degradation allowed to fit the 512k limit - // on prediction modes coding (0: no degradation, - // 100: maximum possible degradation). - - uint32_t pad[8]; // padding for later use -} WebPConfig; - -// Enumerate some predefined settings for WebPConfig, depending on the type -// of source picture. These presets are used when calling WebPConfigPreset(). -typedef enum { - WEBP_PRESET_DEFAULT = 0, // default preset. - WEBP_PRESET_PICTURE, // digital picture, like portrait, inner shot - WEBP_PRESET_PHOTO, // outdoor photograph, with natural lighting - WEBP_PRESET_DRAWING, // hand or line drawing, with high-contrast details - WEBP_PRESET_ICON, // small-sized colorful images - WEBP_PRESET_TEXT // text-like -} WebPPreset; - -// Internal, version-checked, entry point -WEBP_EXTERN(int) WebPConfigInitInternal(WebPConfig*, WebPPreset, float, int); - -// Should always be called, to initialize a fresh WebPConfig structure before -// modification. Returns false in case of version mismatch. WebPConfigInit() -// must have succeeded before using the 'config' object. -// Note that the default values are lossless=0 and quality=75. -static WEBP_INLINE int WebPConfigInit(WebPConfig* config) { - return WebPConfigInitInternal(config, WEBP_PRESET_DEFAULT, 75.f, - WEBP_ENCODER_ABI_VERSION); -} - -// This function will initialize the configuration according to a predefined -// set of parameters (referred to by 'preset') and a given quality factor. -// This function can be called as a replacement to WebPConfigInit(). Will -// return false in case of error. -static WEBP_INLINE int WebPConfigPreset(WebPConfig* config, - WebPPreset preset, float quality) { - return WebPConfigInitInternal(config, preset, quality, - WEBP_ENCODER_ABI_VERSION); -} - -// Returns true if 'config' is non-NULL and all configuration parameters are -// within their valid ranges. -WEBP_EXTERN(int) WebPValidateConfig(const WebPConfig* config); - -//------------------------------------------------------------------------------ -// Input / Output - -typedef struct WebPPicture WebPPicture; // main structure for I/O - -// Structure for storing auxiliary statistics (mostly for lossy encoding). -typedef struct { - int coded_size; // final size - - float PSNR[5]; // peak-signal-to-noise ratio for Y/U/V/All/Alpha - int block_count[3]; // number of intra4/intra16/skipped macroblocks - int header_bytes[2]; // approximate number of bytes spent for header - // and mode-partition #0 - int residual_bytes[3][4]; // approximate number of bytes spent for - // DC/AC/uv coefficients for each (0..3) segments. - int segment_size[4]; // number of macroblocks in each segments - int segment_quant[4]; // quantizer values for each segments - int segment_level[4]; // filtering strength for each segments [0..63] - - int alpha_data_size; // size of the transparency data - int layer_data_size; // size of the enhancement layer data - - // lossless encoder statistics - uint32_t lossless_features; // bit0:predictor bit1:cross-color transform - // bit2:subtract-green bit3:color indexing - int histogram_bits; // number of precision bits of histogram - int transform_bits; // precision bits for transform - int cache_bits; // number of bits for color cache lookup - int palette_size; // number of color in palette, if used - int lossless_size; // final lossless size - - uint32_t pad[4]; // padding for later use -} WebPAuxStats; - -// Signature for output function. Should return true if writing was successful. -// data/data_size is the segment of data to write, and 'picture' is for -// reference (and so one can make use of picture->custom_ptr). -typedef int (*WebPWriterFunction)(const uint8_t* data, size_t data_size, - const WebPPicture* picture); - -// WebPMemoryWrite: a special WebPWriterFunction that writes to memory using -// the following WebPMemoryWriter object (to be set as a custom_ptr). -typedef struct { - uint8_t* mem; // final buffer (of size 'max_size', larger than 'size'). - size_t size; // final size - size_t max_size; // total capacity - uint32_t pad[1]; // padding for later use -} WebPMemoryWriter; - -// The following must be called first before any use. -WEBP_EXTERN(void) WebPMemoryWriterInit(WebPMemoryWriter* writer); - -// The custom writer to be used with WebPMemoryWriter as custom_ptr. Upon -// completion, writer.mem and writer.size will hold the coded data. -WEBP_EXTERN(int) WebPMemoryWrite(const uint8_t* data, size_t data_size, - const WebPPicture* picture); - -// Progress hook, called from time to time to report progress. It can return -// false to request an abort of the encoding process, or true otherwise if -// everything is OK. -typedef int (*WebPProgressHook)(int percent, const WebPPicture* picture); - -typedef enum { - // chroma sampling - WEBP_YUV420 = 0, // 4:2:0 - WEBP_YUV422 = 1, // 4:2:2 - WEBP_YUV444 = 2, // 4:4:4 - WEBP_YUV400 = 3, // grayscale - WEBP_CSP_UV_MASK = 3, // bit-mask to get the UV sampling factors - // alpha channel variants - WEBP_YUV420A = 4, - WEBP_YUV422A = 5, - WEBP_YUV444A = 6, - WEBP_YUV400A = 7, // grayscale + alpha - WEBP_CSP_ALPHA_BIT = 4 // bit that is set if alpha is present -} WebPEncCSP; - -// Encoding error conditions. -typedef enum { - VP8_ENC_OK = 0, - VP8_ENC_ERROR_OUT_OF_MEMORY, // memory error allocating objects - VP8_ENC_ERROR_BITSTREAM_OUT_OF_MEMORY, // memory error while flushing bits - VP8_ENC_ERROR_NULL_PARAMETER, // a pointer parameter is NULL - VP8_ENC_ERROR_INVALID_CONFIGURATION, // configuration is invalid - VP8_ENC_ERROR_BAD_DIMENSION, // picture has invalid width/height - VP8_ENC_ERROR_PARTITION0_OVERFLOW, // partition is bigger than 512k - VP8_ENC_ERROR_PARTITION_OVERFLOW, // partition is bigger than 16M - VP8_ENC_ERROR_BAD_WRITE, // error while flushing bytes - VP8_ENC_ERROR_FILE_TOO_BIG, // file is bigger than 4G - VP8_ENC_ERROR_USER_ABORT, // abort request by user - VP8_ENC_ERROR_LAST // list terminator. always last. -} WebPEncodingError; - -// maximum width/height allowed (inclusive), in pixels -#define WEBP_MAX_DIMENSION 16383 - -// Main exchange structure (input samples, output bytes, statistics) -struct WebPPicture { - - // INPUT - ////////////// - // Main flag for encoder selecting between ARGB or YUV input. - // It is recommended to use ARGB input (*argb, argb_stride) for lossless - // compression, and YUV input (*y, *u, *v, etc.) for lossy compression - // since these are the respective native colorspace for these formats. - int use_argb; - - // YUV input (mostly used for input to lossy compression) - WebPEncCSP colorspace; // colorspace: should be YUV420 for now (=Y'CbCr). - int width, height; // dimensions (less or equal to WEBP_MAX_DIMENSION) - uint8_t *y, *u, *v; // pointers to luma/chroma planes. - int y_stride, uv_stride; // luma/chroma strides. - uint8_t* a; // pointer to the alpha plane - int a_stride; // stride of the alpha plane - uint32_t pad1[2]; // padding for later use - - // ARGB input (mostly used for input to lossless compression) - uint32_t* argb; // Pointer to argb (32 bit) plane. - int argb_stride; // This is stride in pixels units, not bytes. - uint32_t pad2[3]; // padding for later use - - // OUTPUT - /////////////// - // Byte-emission hook, to store compressed bytes as they are ready. - WebPWriterFunction writer; // can be NULL - void* custom_ptr; // can be used by the writer. - - // map for extra information (only for lossy compression mode) - int extra_info_type; // 1: intra type, 2: segment, 3: quant - // 4: intra-16 prediction mode, - // 5: chroma prediction mode, - // 6: bit cost, 7: distortion - uint8_t* extra_info; // if not NULL, points to an array of size - // ((width + 15) / 16) * ((height + 15) / 16) that - // will be filled with a macroblock map, depending - // on extra_info_type. - - // STATS AND REPORTS - /////////////////////////// - // Pointer to side statistics (updated only if not NULL) - WebPAuxStats* stats; - - // Error code for the latest error encountered during encoding - WebPEncodingError error_code; - - // If not NULL, report progress during encoding. - WebPProgressHook progress_hook; - - void* user_data; // this field is free to be set to any value and - // used during callbacks (like progress-report e.g.). - - uint32_t pad3[3]; // padding for later use - - // Unused for now: original samples (for non-YUV420 modes) - uint8_t *u0, *v0; - int uv0_stride; - - uint32_t pad4[7]; // padding for later use - - // PRIVATE FIELDS - //////////////////// - void* memory_; // row chunk of memory for yuva planes - void* memory_argb_; // and for argb too. - void* pad5[2]; // padding for later use -}; - -// Internal, version-checked, entry point -WEBP_EXTERN(int) WebPPictureInitInternal(WebPPicture*, int); - -// Should always be called, to initialize the structure. Returns false in case -// of version mismatch. WebPPictureInit() must have succeeded before using the -// 'picture' object. -// Note that, by default, use_argb is false and colorspace is WEBP_YUV420. -static WEBP_INLINE int WebPPictureInit(WebPPicture* picture) { - return WebPPictureInitInternal(picture, WEBP_ENCODER_ABI_VERSION); -} - -//------------------------------------------------------------------------------ -// WebPPicture utils - -// Convenience allocation / deallocation based on picture->width/height: -// Allocate y/u/v buffers as per colorspace/width/height specification. -// Note! This function will free the previous buffer if needed. -// Returns false in case of memory error. -WEBP_EXTERN(int) WebPPictureAlloc(WebPPicture* picture); - -// Release the memory allocated by WebPPictureAlloc() or WebPPictureImport*(). -// Note that this function does _not_ free the memory used by the 'picture' -// object itself. -// Besides memory (which is reclaimed) all other fields of 'picture' are -// preserved. -WEBP_EXTERN(void) WebPPictureFree(WebPPicture* picture); - -// Copy the pixels of *src into *dst, using WebPPictureAlloc. Upon return, -// *dst will fully own the copied pixels (this is not a view). -// Returns false in case of memory allocation error. -WEBP_EXTERN(int) WebPPictureCopy(const WebPPicture* src, WebPPicture* dst); - -// Compute PSNR or SSIM distortion between two pictures. -// Result is in dB, stores in result[] in the Y/U/V/Alpha/All order. -// Returns false in case of error (pic1 and pic2 don't have same dimension, ...) -// Warning: this function is rather CPU-intensive. -WEBP_EXTERN(int) WebPPictureDistortion( - const WebPPicture* pic1, const WebPPicture* pic2, - int metric_type, // 0 = PSNR, 1 = SSIM - float result[5]); - -// self-crops a picture to the rectangle defined by top/left/width/height. -// Returns false in case of memory allocation error, or if the rectangle is -// outside of the source picture. -// The rectangle for the view is defined by the top-left corner pixel -// coordinates (left, top) as well as its width and height. This rectangle -// must be fully be comprised inside the 'src' source picture. If the source -// picture uses the YUV420 colorspace, the top and left coordinates will be -// snapped to even values. -WEBP_EXTERN(int) WebPPictureCrop(WebPPicture* picture, - int left, int top, int width, int height); - -// Extracts a view from 'src' picture into 'dst'. The rectangle for the view -// is defined by the top-left corner pixel coordinates (left, top) as well -// as its width and height. This rectangle must be fully be comprised inside -// the 'src' source picture. If the source picture uses the YUV420 colorspace, -// the top and left coordinates will be snapped to even values. -// Picture 'src' must out-live 'dst' picture. Self-extraction of view is allowed -// ('src' equal to 'dst') as a mean of fast-cropping (but note that doing so, -// the original dimension will be lost). -// Returns false in case of memory allocation error or invalid parameters. -WEBP_EXTERN(int) WebPPictureView(const WebPPicture* src, - int left, int top, int width, int height, - WebPPicture* dst); - -// Returns true if the 'picture' is actually a view and therefore does -// not own the memory for pixels. -WEBP_EXTERN(int) WebPPictureIsView(const WebPPicture* picture); - -// Rescale a picture to new dimension width x height. -// Now gamma correction is applied. -// Returns false in case of error (invalid parameter or insufficient memory). -WEBP_EXTERN(int) WebPPictureRescale(WebPPicture* pic, int width, int height); - -// Colorspace conversion function to import RGB samples. -// Previous buffer will be free'd, if any. -// *rgb buffer should have a size of at least height * rgb_stride. -// Returns false in case of memory error. -WEBP_EXTERN(int) WebPPictureImportRGB( - WebPPicture* picture, const uint8_t* rgb, int rgb_stride); -// Same, but for RGBA buffer. -WEBP_EXTERN(int) WebPPictureImportRGBA( - WebPPicture* picture, const uint8_t* rgba, int rgba_stride); -// Same, but for RGBA buffer. Imports the RGB direct from the 32-bit format -// input buffer ignoring the alpha channel. Avoids needing to copy the data -// to a temporary 24-bit RGB buffer to import the RGB only. -WEBP_EXTERN(int) WebPPictureImportRGBX( - WebPPicture* picture, const uint8_t* rgbx, int rgbx_stride); - -// Variants of the above, but taking BGR(A|X) input. -WEBP_EXTERN(int) WebPPictureImportBGR( - WebPPicture* picture, const uint8_t* bgr, int bgr_stride); -WEBP_EXTERN(int) WebPPictureImportBGRA( - WebPPicture* picture, const uint8_t* bgra, int bgra_stride); -WEBP_EXTERN(int) WebPPictureImportBGRX( - WebPPicture* picture, const uint8_t* bgrx, int bgrx_stride); - -// Converts picture->argb data to the YUVA format specified by 'colorspace'. -// Upon return, picture->use_argb is set to false. The presence of real -// non-opaque transparent values is detected, and 'colorspace' will be -// adjusted accordingly. Note that this method is lossy. -// Returns false in case of error. -WEBP_EXTERN(int) WebPPictureARGBToYUVA(WebPPicture* picture, - WebPEncCSP colorspace); - -// Converts picture->yuv to picture->argb and sets picture->use_argb to true. -// The input format must be YUV_420 or YUV_420A. -// Note that the use of this method is discouraged if one has access to the -// raw ARGB samples, since using YUV420 is comparatively lossy. Also, the -// conversion from YUV420 to ARGB incurs a small loss too. -// Returns false in case of error. -WEBP_EXTERN(int) WebPPictureYUVAToARGB(WebPPicture* picture); - -// Helper function: given a width x height plane of YUV(A) samples -// (with stride 'stride'), clean-up the YUV samples under fully transparent -// area, to help compressibility (no guarantee, though). -WEBP_EXTERN(void) WebPCleanupTransparentArea(WebPPicture* picture); - -// Scan the picture 'picture' for the presence of non fully opaque alpha values. -// Returns true in such case. Otherwise returns false (indicating that the -// alpha plane can be ignored altogether e.g.). -WEBP_EXTERN(int) WebPPictureHasTransparency(const WebPPicture* picture); - -//------------------------------------------------------------------------------ -// Main call - -// Main encoding call, after config and picture have been initialized. -// 'picture' must be less than 16384x16384 in dimension (cf WEBP_MAX_DIMENSION), -// and the 'config' object must be a valid one. -// Returns false in case of error, true otherwise. -// In case of error, picture->error_code is updated accordingly. -// 'picture' can hold the source samples in both YUV(A) or ARGB input, depending -// on the value of 'picture->use_argb'. It is highly recommended to use -// the former for lossy encoding, and the latter for lossless encoding -// (when config.lossless is true). Automatic conversion from one format to -// another is provided but they both incur some loss. -WEBP_EXTERN(int) WebPEncode(const WebPConfig* config, WebPPicture* picture); - -//------------------------------------------------------------------------------ - -#if defined(__cplusplus) || defined(c_plusplus) -} // extern "C" -#endif - -#endif /* WEBP_WEBP_ENCODE_H_ */ |