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author | Hangyu Kuang <hkuang@google.com> | 2016-07-06 14:21:45 -0700 |
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committer | Hangyu Kuang <hkuang@google.com> | 2016-07-08 09:51:10 -0700 |
commit | f047e7ca6983218eed7703c7afd51fed7bd3b5c9 (patch) | |
tree | 2667579566b6270c21ee4b495b4cd119af5ccf5b /files/source/mjpeg_validate.cc | |
parent | bb74e3e19b98261031216de8cadcef34cccd9e4a (diff) | |
download | libyuv-f047e7ca6983218eed7703c7afd51fed7bd3b5c9.tar.gz |
Update libyuv to r1602 version to get best performance.android-cts_7.1_r1android-cts-7.1_r9android-cts-7.1_r8android-cts-7.1_r7android-cts-7.1_r6android-cts-7.1_r5android-cts-7.1_r4android-cts-7.1_r3android-cts-7.1_r29android-cts-7.1_r28android-cts-7.1_r27android-cts-7.1_r26android-cts-7.1_r25android-cts-7.1_r24android-cts-7.1_r23android-cts-7.1_r22android-cts-7.1_r21android-cts-7.1_r20android-cts-7.1_r2android-cts-7.1_r19android-cts-7.1_r18android-cts-7.1_r17android-cts-7.1_r16android-cts-7.1_r15android-cts-7.1_r14android-cts-7.1_r13android-cts-7.1_r12android-cts-7.1_r11android-cts-7.1_r10android-cts-7.1_r1android-7.1.2_r9android-7.1.2_r8android-7.1.2_r6android-7.1.2_r5android-7.1.2_r4android-7.1.2_r39android-7.1.2_r38android-7.1.2_r37android-7.1.2_r36android-7.1.2_r33android-7.1.2_r32android-7.1.2_r30android-7.1.2_r3android-7.1.2_r29android-7.1.2_r28android-7.1.2_r27android-7.1.2_r25android-7.1.2_r24android-7.1.2_r23android-7.1.2_r2android-7.1.2_r19android-7.1.2_r18android-7.1.2_r17android-7.1.2_r16android-7.1.2_r15android-7.1.2_r14android-7.1.2_r13android-7.1.2_r12android-7.1.2_r11android-7.1.2_r10android-7.1.2_r1android-7.1.1_r9android-7.1.1_r8android-7.1.1_r7android-7.1.1_r61android-7.1.1_r60android-7.1.1_r6android-7.1.1_r59android-7.1.1_r58android-7.1.1_r57android-7.1.1_r56android-7.1.1_r55android-7.1.1_r54android-7.1.1_r53android-7.1.1_r52android-7.1.1_r51android-7.1.1_r50android-7.1.1_r49android-7.1.1_r48android-7.1.1_r47android-7.1.1_r46android-7.1.1_r45android-7.1.1_r44android-7.1.1_r43android-7.1.1_r42android-7.1.1_r41android-7.1.1_r40android-7.1.1_r4android-7.1.1_r39android-7.1.1_r38android-7.1.1_r35android-7.1.1_r33android-7.1.1_r32android-7.1.1_r31android-7.1.1_r3android-7.1.1_r28android-7.1.1_r27android-7.1.1_r26android-7.1.1_r25android-7.1.1_r24android-7.1.1_r23android-7.1.1_r22android-7.1.1_r21android-7.1.1_r20android-7.1.1_r2android-7.1.1_r17android-7.1.1_r16android-7.1.1_r15android-7.1.1_r14android-7.1.1_r13android-7.1.1_r12android-7.1.1_r11android-7.1.1_r10android-7.1.1_r1android-7.1.0_r7android-7.1.0_r6android-7.1.0_r5android-7.1.0_r4android-7.1.0_r3android-7.1.0_r2android-7.1.0_r1nougat-mr2.3-releasenougat-mr2.2-releasenougat-mr2.1-releasenougat-mr2-security-releasenougat-mr2-releasenougat-mr2-pixel-releasenougat-mr2-devnougat-mr1.8-releasenougat-mr1.7-releasenougat-mr1.6-releasenougat-mr1.5-releasenougat-mr1.4-releasenougat-mr1.3-releasenougat-mr1.2-releasenougat-mr1.1-releasenougat-mr1-volantis-releasenougat-mr1-security-releasenougat-mr1-releasenougat-mr1-flounder-releasenougat-mr1-devnougat-mr1-cts-releasenougat-dr1-release
Bug: 29870647
Change-Id: I8ec9fab7f55765fa33ebe7ba1c7ad2147f418de2
Diffstat (limited to 'files/source/mjpeg_validate.cc')
-rw-r--r-- | files/source/mjpeg_validate.cc | 71 |
1 files changed, 71 insertions, 0 deletions
diff --git a/files/source/mjpeg_validate.cc b/files/source/mjpeg_validate.cc new file mode 100644 index 00000000..9c488320 --- /dev/null +++ b/files/source/mjpeg_validate.cc @@ -0,0 +1,71 @@ +/* + * 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" + +#include <string.h> // For memchr. + +#ifdef __cplusplus +namespace libyuv { +extern "C" { +#endif + +// Helper function to scan for EOI marker (0xff 0xd9). +static LIBYUV_BOOL ScanEOI(const uint8* sample, size_t sample_size) { + if (sample_size >= 2) { + const uint8* end = sample + sample_size - 1; + const uint8* it = sample; + while (it < end) { + // TODO(fbarchard): scan for 0xd9 instead. + it = static_cast<const uint8 *>(memchr(it, 0xff, end - it)); + if (it == NULL) { + break; + } + if (it[1] == 0xd9) { + return LIBYUV_TRUE; // Success: Valid jpeg. + } + ++it; // Skip over current 0xff. + } + } + // ERROR: Invalid jpeg end code not found. Size sample_size + return LIBYUV_FALSE; +} + +// Helper function to validate the jpeg appears intact. +LIBYUV_BOOL ValidateJpeg(const uint8* sample, size_t sample_size) { + // Maximum size that ValidateJpeg will consider valid. + const size_t kMaxJpegSize = 0x7fffffffull; + const size_t kBackSearchSize = 1024; + if (sample_size < 64 || sample_size > kMaxJpegSize || !sample) { + // ERROR: Invalid jpeg size: sample_size + return LIBYUV_FALSE; + } + if (sample[0] != 0xff || sample[1] != 0xd8) { // SOI marker + // ERROR: Invalid jpeg initial start code + return LIBYUV_FALSE; + } + + // Look for the End Of Image (EOI) marker near the end of the buffer. + if (sample_size > kBackSearchSize) { + if (ScanEOI(sample + sample_size - kBackSearchSize, kBackSearchSize)) { + return LIBYUV_TRUE; // Success: Valid jpeg. + } + // Reduce search size for forward search. + sample_size = sample_size - kBackSearchSize + 1; + } + // Step over SOI marker and scan for EOI. + return ScanEOI(sample + 2, sample_size - 2); +} + +#ifdef __cplusplus +} // extern "C" +} // namespace libyuv +#endif + |