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Side by Side Diff: third_party/libwebp/dec/vp8i.h

Issue 2584033003: libwebp-0.5.2-rc2 (Closed)
Patch Set: layout tests Created 4 years ago
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1 // Copyright 2010 Google Inc. All Rights Reserved. 1 // Copyright 2010 Google Inc. All Rights Reserved.
2 // 2 //
3 // Use of this source code is governed by a BSD-style license 3 // Use of this source code is governed by a BSD-style license
4 // that can be found in the COPYING file in the root of the source 4 // that can be found in the COPYING file in the root of the source
5 // tree. An additional intellectual property rights grant can be found 5 // tree. An additional intellectual property rights grant can be found
6 // in the file PATENTS. All contributing project authors may 6 // in the file PATENTS. All contributing project authors may
7 // be found in the AUTHORS file in the root of the source tree. 7 // be found in the AUTHORS file in the root of the source tree.
8 // ----------------------------------------------------------------------------- 8 // -----------------------------------------------------------------------------
9 // 9 //
10 // VP8 decoder: internal header. 10 // VP8 decoder: internal header.
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25 #ifdef __cplusplus 25 #ifdef __cplusplus
26 extern "C" { 26 extern "C" {
27 #endif 27 #endif
28 28
29 //------------------------------------------------------------------------------ 29 //------------------------------------------------------------------------------
30 // Various defines and enums 30 // Various defines and enums
31 31
32 // version numbers 32 // version numbers
33 #define DEC_MAJ_VERSION 0 33 #define DEC_MAJ_VERSION 0
34 #define DEC_MIN_VERSION 5 34 #define DEC_MIN_VERSION 5
35 #define DEC_REV_VERSION 1 35 #define DEC_REV_VERSION 2
36 36
37 // YUV-cache parameters. Cache is 32-bytes wide (= one cacheline). 37 // YUV-cache parameters. Cache is 32-bytes wide (= one cacheline).
38 // Constraints are: We need to store one 16x16 block of luma samples (y), 38 // Constraints are: We need to store one 16x16 block of luma samples (y),
39 // and two 8x8 chroma blocks (u/v). These are better be 16-bytes aligned, 39 // and two 8x8 chroma blocks (u/v). These are better be 16-bytes aligned,
40 // in order to be SIMD-friendly. We also need to store the top, left and 40 // in order to be SIMD-friendly. We also need to store the top, left and
41 // top-left samples (from previously decoded blocks), along with four 41 // top-left samples (from previously decoded blocks), along with four
42 // extra top-right samples for luma (intra4x4 prediction only). 42 // extra top-right samples for luma (intra4x4 prediction only).
43 // One possible layout is, using 32 * (17 + 9) bytes: 43 // One possible layout is, using 32 * (17 + 9) bytes:
44 // 44 //
45 // .+------ <- only 1 pixel high 45 // .+------ <- only 1 pixel high
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311 const VP8Io* const io, 311 const VP8Io* const io,
312 int row, int num_rows); 312 int row, int num_rows);
313 313
314 //------------------------------------------------------------------------------ 314 //------------------------------------------------------------------------------
315 315
316 #ifdef __cplusplus 316 #ifdef __cplusplus
317 } // extern "C" 317 } // extern "C"
318 #endif 318 #endif
319 319
320 #endif /* WEBP_DEC_VP8I_H_ */ 320 #endif /* WEBP_DEC_VP8I_H_ */
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