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Diffstat (limited to 'src/main/jni/libwebp/utils/rescaler.h')
-rw-r--r-- | src/main/jni/libwebp/utils/rescaler.h | 82 |
1 files changed, 0 insertions, 82 deletions
diff --git a/src/main/jni/libwebp/utils/rescaler.h b/src/main/jni/libwebp/utils/rescaler.h deleted file mode 100644 index a6f378712..000000000 --- a/src/main/jni/libwebp/utils/rescaler.h +++ /dev/null @@ -1,82 +0,0 @@ -// Copyright 2012 Google Inc. All Rights Reserved. -// -// Use of this source code is governed by a BSD-style license -// that can be found in the COPYING 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. -// ----------------------------------------------------------------------------- -// -// Rescaling functions -// -// Author: Skal (pascal.massimino@gmail.com) - -#ifndef WEBP_UTILS_RESCALER_H_ -#define WEBP_UTILS_RESCALER_H_ - -#ifdef __cplusplus -extern "C" { -#endif - -#include "../webp/types.h" - -// Structure used for on-the-fly rescaling -typedef struct { - int x_expand; // true if we're expanding in the x direction - int num_channels; // bytes to jump between pixels - int fy_scale, fx_scale; // fixed-point scaling factor - int64_t fxy_scale; // '' - // we need hpel-precise add/sub increments, for the downsampled U/V planes. - int y_accum; // vertical accumulator - int y_add, y_sub; // vertical increments (add ~= src, sub ~= dst) - int x_add, x_sub; // horizontal increments (add ~= src, sub ~= dst) - int src_width, src_height; // source dimensions - int dst_width, dst_height; // destination dimensions - uint8_t* dst; - int dst_stride; - int32_t* irow, *frow; // work buffer -} WebPRescaler; - -// Initialize a rescaler given scratch area 'work' and dimensions of src & dst. -void WebPRescalerInit(WebPRescaler* const rescaler, - int src_width, int src_height, - uint8_t* const dst, - int dst_width, int dst_height, int dst_stride, - int num_channels, - int x_add, int x_sub, - int y_add, int y_sub, - int32_t* const work); - -// Returns the number of input lines needed next to produce one output line, -// considering that the maximum available input lines are 'max_num_lines'. -int WebPRescaleNeededLines(const WebPRescaler* const rescaler, - int max_num_lines); - -// Import multiple rows over all channels, until at least one row is ready to -// be exported. Returns the actual number of lines that were imported. -int WebPRescalerImport(WebPRescaler* const rescaler, int num_rows, - const uint8_t* src, int src_stride); - -// Import a row of data and save its contribution in the rescaler. -// 'channel' denotes the channel number to be imported. -extern void (*WebPRescalerImportRow)(WebPRescaler* const wrk, - const uint8_t* const src, int channel); -// Export one row (starting at x_out position) from rescaler. -extern void (*WebPRescalerExportRow)(WebPRescaler* const wrk, int x_out); - -// Return true if there is pending output rows ready. -static WEBP_INLINE -int WebPRescalerHasPendingOutput(const WebPRescaler* const rescaler) { - return (rescaler->y_accum <= 0); -} - -// Export as many rows as possible. Return the numbers of rows written. -int WebPRescalerExport(WebPRescaler* const rescaler); - -//------------------------------------------------------------------------------ - -#ifdef __cplusplus -} // extern "C" -#endif - -#endif /* WEBP_UTILS_RESCALER_H_ */ |