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Side by Side Diff: third_party/libwebp/dec/frame_dec.c

Issue 2651883004: libwebp-0.6.0-rc1 (Closed)
Patch Set: Created 3 years, 10 months 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 // Frame-reconstruction function. Memory allocation. 10 // Frame-reconstruction function. Memory allocation.
11 // 11 //
12 // Author: Skal (pascal.massimino@gmail.com) 12 // Author: Skal (pascal.massimino@gmail.com)
13 13
14 #include <stdlib.h> 14 #include <stdlib.h>
15 #include "./vp8i.h" 15 #include "./vp8i_dec.h"
16 #include "../utils/utils.h" 16 #include "../utils/utils.h"
17 17
18 //------------------------------------------------------------------------------ 18 //------------------------------------------------------------------------------
19 // Main reconstruction function. 19 // Main reconstruction function.
20 20
21 static const int kScan[16] = { 21 static const int kScan[16] = {
22 0 + 0 * BPS, 4 + 0 * BPS, 8 + 0 * BPS, 12 + 0 * BPS, 22 0 + 0 * BPS, 4 + 0 * BPS, 8 + 0 * BPS, 12 + 0 * BPS,
23 0 + 4 * BPS, 4 + 4 * BPS, 8 + 4 * BPS, 12 + 4 * BPS, 23 0 + 4 * BPS, 4 + 4 * BPS, 8 + 4 * BPS, 12 + 4 * BPS,
24 0 + 8 * BPS, 4 + 8 * BPS, 8 + 8 * BPS, 12 + 8 * BPS, 24 0 + 8 * BPS, 4 + 8 * BPS, 8 + 8 * BPS, 12 + 8 * BPS,
25 0 + 12 * BPS, 4 + 12 * BPS, 8 + 12 * BPS, 12 + 12 * BPS 25 0 + 12 * BPS, 4 + 12 * BPS, 8 + 12 * BPS, 12 + 12 * BPS
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716 716
717 if (needed != (size_t)needed) return 0; // check for overflow 717 if (needed != (size_t)needed) return 0; // check for overflow
718 if (needed > dec->mem_size_) { 718 if (needed > dec->mem_size_) {
719 WebPSafeFree(dec->mem_); 719 WebPSafeFree(dec->mem_);
720 dec->mem_size_ = 0; 720 dec->mem_size_ = 0;
721 dec->mem_ = WebPSafeMalloc(needed, sizeof(uint8_t)); 721 dec->mem_ = WebPSafeMalloc(needed, sizeof(uint8_t));
722 if (dec->mem_ == NULL) { 722 if (dec->mem_ == NULL) {
723 return VP8SetError(dec, VP8_STATUS_OUT_OF_MEMORY, 723 return VP8SetError(dec, VP8_STATUS_OUT_OF_MEMORY,
724 "no memory during frame initialization."); 724 "no memory during frame initialization.");
725 } 725 }
726 // down-cast is ok, thanks to WebPSafeAlloc() above. 726 // down-cast is ok, thanks to WebPSafeMalloc() above.
727 dec->mem_size_ = (size_t)needed; 727 dec->mem_size_ = (size_t)needed;
728 } 728 }
729 729
730 mem = (uint8_t*)dec->mem_; 730 mem = (uint8_t*)dec->mem_;
731 dec->intra_t_ = (uint8_t*)mem; 731 dec->intra_t_ = (uint8_t*)mem;
732 mem += intra_pred_mode_size; 732 mem += intra_pred_mode_size;
733 733
734 dec->yuv_t_ = (VP8TopSamples*)mem; 734 dec->yuv_t_ = (VP8TopSamples*)mem;
735 mem += top_size; 735 mem += top_size;
736 736
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803 803
804 int VP8InitFrame(VP8Decoder* const dec, VP8Io* const io) { 804 int VP8InitFrame(VP8Decoder* const dec, VP8Io* const io) {
805 if (!InitThreadContext(dec)) return 0; // call first. Sets dec->num_caches_. 805 if (!InitThreadContext(dec)) return 0; // call first. Sets dec->num_caches_.
806 if (!AllocateMemory(dec)) return 0; 806 if (!AllocateMemory(dec)) return 0;
807 InitIo(dec, io); 807 InitIo(dec, io);
808 VP8DspInit(); // Init critical function pointers and look-up tables. 808 VP8DspInit(); // Init critical function pointers and look-up tables.
809 return 1; 809 return 1;
810 } 810 }
811 811
812 //------------------------------------------------------------------------------ 812 //------------------------------------------------------------------------------
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