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comparison: media/libyuv/source/mjpeg_validate.cc
media/libyuv/source/mjpeg_validate.cc
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| -1:000000000000 | 0:c0775f959f26 |
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| 1 /* | |
| 2 * Copyright 2012 The LibYuv Project Authors. All rights reserved. | |
| 3 * | |
| 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 | |
| 6 * tree. An additional intellectual property rights grant can be found | |
| 7 * in the file PATENTS. All contributing project authors may | |
| 8 * be found in the AUTHORS file in the root of the source tree. | |
| 9 */ | |
| 10 | |
| 11 #include "libyuv/mjpeg_decoder.h" | |
| 12 | |
| 13 #ifdef __cplusplus | |
| 14 namespace libyuv { | |
| 15 extern "C" { | |
| 16 #endif | |
| 17 | |
| 18 // Helper function to validate the jpeg appears intact. | |
| 19 // TODO(fbarchard): Optimize case where SOI is found but EOI is not. | |
| 20 LIBYUV_BOOL ValidateJpeg(const uint8* sample, size_t sample_size) { | |
| 21 size_t i; | |
| 22 if (sample_size < 64) { | |
| 23 // ERROR: Invalid jpeg size: sample_size | |
| 24 return LIBYUV_FALSE; | |
| 25 } | |
| 26 if (sample[0] != 0xff || sample[1] != 0xd8) { // Start Of Image | |
| 27 // ERROR: Invalid jpeg initial start code | |
| 28 return LIBYUV_FALSE; | |
| 29 } | |
| 30 for (i = sample_size - 2; i > 1;) { | |
| 31 if (sample[i] != 0xd9) { | |
| 32 if (sample[i] == 0xff && sample[i + 1] == 0xd9) { // End Of Image | |
| 33 return LIBYUV_TRUE; // Success: Valid jpeg. | |
| 34 } | |
| 35 --i; | |
| 36 } | |
| 37 --i; | |
| 38 } | |
| 39 // ERROR: Invalid jpeg end code not found. Size sample_size | |
| 40 return LIBYUV_FALSE; | |
| 41 } | |
| 42 | |
| 43 #ifdef __cplusplus | |
| 44 } // extern "C" | |
| 45 } // namespace libyuv | |
| 46 #endif | |
| 47 |
