| /* |
| * Copyright 2012 The LibYuv Project Authors. All rights reserved. |
| * |
| * Use of this source code is governed by a BSD-style license |
| * that can be found in the LICENSE file in the root of the source |
| * tree. An additional intellectual property rights grant can be found |
| * in the file PATENTS. All contributing project authors may |
| * be found in the AUTHORS file in the root of the source tree. |
| */ |
| |
| #include "libyuv/mjpeg_decoder.h" |
| |
| namespace libyuv { |
| |
| // Helper function to validate the jpeg appears intact. |
| // TODO(fbarchard): Optimize case where SOI is found but EOI is not. |
| bool ValidateJpeg(const uint8* sample, size_t sample_size) { |
| if (sample_size < 64) { |
| // ERROR: Invalid jpeg size: sample_size |
| return false; |
| } |
| if (sample[0] != 0xff || sample[1] != 0xd8) { // Start Of Image |
| // ERROR: Invalid jpeg initial start code |
| return false; |
| } |
| for (int i = static_cast<int>(sample_size) - 2; i > 1;) { |
| if (sample[i] != 0xd9) { |
| if (sample[i] == 0xff && sample[i + 1] == 0xd9) { // End Of Image |
| return true; |
| } |
| --i; |
| } |
| --i; |
| } |
| // ERROR: Invalid jpeg end code not found. Size sample_size |
| return false; |
| } |
| |
| } // namespace libyuv |
| |
| |