141294d96d7dbf9bc215b09832a8336c5fb158f0bjohannkoenig@chromium.org/* 241294d96d7dbf9bc215b09832a8336c5fb158f0bjohannkoenig@chromium.org * Copyright 2012 The LibYuv Project Authors. All rights reserved. 341294d96d7dbf9bc215b09832a8336c5fb158f0bjohannkoenig@chromium.org * 441294d96d7dbf9bc215b09832a8336c5fb158f0bjohannkoenig@chromium.org * Use of this source code is governed by a BSD-style license 541294d96d7dbf9bc215b09832a8336c5fb158f0bjohannkoenig@chromium.org * that can be found in the LICENSE file in the root of the source 641294d96d7dbf9bc215b09832a8336c5fb158f0bjohannkoenig@chromium.org * tree. An additional intellectual property rights grant can be found 741294d96d7dbf9bc215b09832a8336c5fb158f0bjohannkoenig@chromium.org * in the file PATENTS. All contributing project authors may 841294d96d7dbf9bc215b09832a8336c5fb158f0bjohannkoenig@chromium.org * be found in the AUTHORS file in the root of the source tree. 941294d96d7dbf9bc215b09832a8336c5fb158f0bjohannkoenig@chromium.org */ 1041294d96d7dbf9bc215b09832a8336c5fb158f0bjohannkoenig@chromium.org 1141294d96d7dbf9bc215b09832a8336c5fb158f0bjohannkoenig@chromium.org#include "libyuv/mjpeg_decoder.h" 1241294d96d7dbf9bc215b09832a8336c5fb158f0bjohannkoenig@chromium.org 1341294d96d7dbf9bc215b09832a8336c5fb158f0bjohannkoenig@chromium.org#ifdef __cplusplus 1441294d96d7dbf9bc215b09832a8336c5fb158f0bjohannkoenig@chromium.orgnamespace libyuv { 1541294d96d7dbf9bc215b09832a8336c5fb158f0bjohannkoenig@chromium.orgextern "C" { 1641294d96d7dbf9bc215b09832a8336c5fb158f0bjohannkoenig@chromium.org#endif 1741294d96d7dbf9bc215b09832a8336c5fb158f0bjohannkoenig@chromium.org 1841294d96d7dbf9bc215b09832a8336c5fb158f0bjohannkoenig@chromium.org// Helper function to validate the jpeg appears intact. 1941294d96d7dbf9bc215b09832a8336c5fb158f0bjohannkoenig@chromium.org// TODO(fbarchard): Optimize case where SOI is found but EOI is not. 2041294d96d7dbf9bc215b09832a8336c5fb158f0bjohannkoenig@chromium.orgLIBYUV_BOOL ValidateJpeg(const uint8* sample, size_t sample_size) { 2141294d96d7dbf9bc215b09832a8336c5fb158f0bjohannkoenig@chromium.org size_t i; 2241294d96d7dbf9bc215b09832a8336c5fb158f0bjohannkoenig@chromium.org if (sample_size < 64) { 2341294d96d7dbf9bc215b09832a8336c5fb158f0bjohannkoenig@chromium.org // ERROR: Invalid jpeg size: sample_size 2441294d96d7dbf9bc215b09832a8336c5fb158f0bjohannkoenig@chromium.org return LIBYUV_FALSE; 2541294d96d7dbf9bc215b09832a8336c5fb158f0bjohannkoenig@chromium.org } 2641294d96d7dbf9bc215b09832a8336c5fb158f0bjohannkoenig@chromium.org if (sample[0] != 0xff || sample[1] != 0xd8) { // Start Of Image 2741294d96d7dbf9bc215b09832a8336c5fb158f0bjohannkoenig@chromium.org // ERROR: Invalid jpeg initial start code 2841294d96d7dbf9bc215b09832a8336c5fb158f0bjohannkoenig@chromium.org return LIBYUV_FALSE; 2941294d96d7dbf9bc215b09832a8336c5fb158f0bjohannkoenig@chromium.org } 3041294d96d7dbf9bc215b09832a8336c5fb158f0bjohannkoenig@chromium.org for (i = sample_size - 2; i > 1;) { 3141294d96d7dbf9bc215b09832a8336c5fb158f0bjohannkoenig@chromium.org if (sample[i] != 0xd9) { 3241294d96d7dbf9bc215b09832a8336c5fb158f0bjohannkoenig@chromium.org if (sample[i] == 0xff && sample[i + 1] == 0xd9) { // End Of Image 3341294d96d7dbf9bc215b09832a8336c5fb158f0bjohannkoenig@chromium.org return LIBYUV_TRUE; // Success: Valid jpeg. 3441294d96d7dbf9bc215b09832a8336c5fb158f0bjohannkoenig@chromium.org } 3541294d96d7dbf9bc215b09832a8336c5fb158f0bjohannkoenig@chromium.org --i; 3641294d96d7dbf9bc215b09832a8336c5fb158f0bjohannkoenig@chromium.org } 3741294d96d7dbf9bc215b09832a8336c5fb158f0bjohannkoenig@chromium.org --i; 3841294d96d7dbf9bc215b09832a8336c5fb158f0bjohannkoenig@chromium.org } 3941294d96d7dbf9bc215b09832a8336c5fb158f0bjohannkoenig@chromium.org // ERROR: Invalid jpeg end code not found. Size sample_size 4041294d96d7dbf9bc215b09832a8336c5fb158f0bjohannkoenig@chromium.org return LIBYUV_FALSE; 4141294d96d7dbf9bc215b09832a8336c5fb158f0bjohannkoenig@chromium.org} 4241294d96d7dbf9bc215b09832a8336c5fb158f0bjohannkoenig@chromium.org 4341294d96d7dbf9bc215b09832a8336c5fb158f0bjohannkoenig@chromium.org#ifdef __cplusplus 4441294d96d7dbf9bc215b09832a8336c5fb158f0bjohannkoenig@chromium.org} // extern "C" 4541294d96d7dbf9bc215b09832a8336c5fb158f0bjohannkoenig@chromium.org} // namespace libyuv 4641294d96d7dbf9bc215b09832a8336c5fb158f0bjohannkoenig@chromium.org#endif 4741294d96d7dbf9bc215b09832a8336c5fb158f0bjohannkoenig@chromium.org 48