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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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