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1 /* | 1 /* |
2 * Copyright (c) 2010 The WebM project authors. All Rights Reserved. | 2 * Copyright (c) 2010 The WebM project authors. All Rights Reserved. |
3 * | 3 * |
4 * Use of this source code is governed by a BSD-style license | 4 * Use of this source code is governed by a BSD-style license |
5 * that can be found in the LICENSE file in the root of the source | 5 * that can be found in the LICENSE file in the root of the source |
6 * tree. An additional intellectual property rights grant can be found | 6 * tree. An additional intellectual property rights grant can be found |
7 * in the file PATENTS. All contributing project authors may | 7 * in the file PATENTS. All contributing project authors may |
8 * be found in the AUTHORS file in the root of the source tree. | 8 * be found in the AUTHORS file in the root of the source tree. |
9 */ | 9 */ |
10 | 10 |
11 | 11 |
12 #include "dboolhuff.h" | 12 #include "dboolhuff.h" |
13 #include "vp8/common/common.h" | 13 #include "vp8/common/common.h" |
| 14 #include "vpx_dsp/vpx_dsp_common.h" |
14 | 15 |
15 int vp8dx_start_decode(BOOL_DECODER *br, | 16 int vp8dx_start_decode(BOOL_DECODER *br, |
16 const unsigned char *source, | 17 const unsigned char *source, |
17 unsigned int source_sz, | 18 unsigned int source_sz, |
18 vpx_decrypt_cb decrypt_cb, | 19 vpx_decrypt_cb decrypt_cb, |
19 void *decrypt_state) | 20 void *decrypt_state) |
20 { | 21 { |
21 br->user_buffer_end = source+source_sz; | 22 br->user_buffer_end = source+source_sz; |
22 br->user_buffer = source; | 23 br->user_buffer = source; |
23 br->value = 0; | 24 br->value = 0; |
(...skipping 17 matching lines...) Expand all Loading... |
41 VP8_BD_VALUE value = br->value; | 42 VP8_BD_VALUE value = br->value; |
42 int count = br->count; | 43 int count = br->count; |
43 int shift = VP8_BD_VALUE_SIZE - CHAR_BIT - (count + CHAR_BIT); | 44 int shift = VP8_BD_VALUE_SIZE - CHAR_BIT - (count + CHAR_BIT); |
44 size_t bytes_left = br->user_buffer_end - bufptr; | 45 size_t bytes_left = br->user_buffer_end - bufptr; |
45 size_t bits_left = bytes_left * CHAR_BIT; | 46 size_t bits_left = bytes_left * CHAR_BIT; |
46 int x = (int)(shift + CHAR_BIT - bits_left); | 47 int x = (int)(shift + CHAR_BIT - bits_left); |
47 int loop_end = 0; | 48 int loop_end = 0; |
48 unsigned char decrypted[sizeof(VP8_BD_VALUE) + 1]; | 49 unsigned char decrypted[sizeof(VP8_BD_VALUE) + 1]; |
49 | 50 |
50 if (br->decrypt_cb) { | 51 if (br->decrypt_cb) { |
51 size_t n = MIN(sizeof(decrypted), bytes_left); | 52 size_t n = VPXMIN(sizeof(decrypted), bytes_left); |
52 br->decrypt_cb(br->decrypt_state, bufptr, decrypted, (int)n); | 53 br->decrypt_cb(br->decrypt_state, bufptr, decrypted, (int)n); |
53 bufptr = decrypted; | 54 bufptr = decrypted; |
54 } | 55 } |
55 | 56 |
56 if(x >= 0) | 57 if(x >= 0) |
57 { | 58 { |
58 count += VP8_LOTS_OF_BITS; | 59 count += VP8_LOTS_OF_BITS; |
59 loop_end = x; | 60 loop_end = x; |
60 } | 61 } |
61 | 62 |
62 if (x < 0 || bits_left) | 63 if (x < 0 || bits_left) |
63 { | 64 { |
64 while(shift >= loop_end) | 65 while(shift >= loop_end) |
65 { | 66 { |
66 count += CHAR_BIT; | 67 count += CHAR_BIT; |
67 value |= (VP8_BD_VALUE)*bufptr << shift; | 68 value |= (VP8_BD_VALUE)*bufptr << shift; |
68 ++bufptr; | 69 ++bufptr; |
69 ++br->user_buffer; | 70 ++br->user_buffer; |
70 shift -= CHAR_BIT; | 71 shift -= CHAR_BIT; |
71 } | 72 } |
72 } | 73 } |
73 | 74 |
74 br->value = value; | 75 br->value = value; |
75 br->count = count; | 76 br->count = count; |
76 } | 77 } |
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