DefaultImageFormatChecker.smali

.class public Lcom/facebook/imageformat/DefaultImageFormatChecker;
.super Ljava/lang/Object;
.source "SourceFile"

# interfaces
.implements Lcom/facebook/imageformat/ImageFormat$FormatChecker;


# static fields
.field private static final BMP_HEADER:[B

.field private static final BMP_HEADER_LENGTH:I

.field private static final EXTENDED_WEBP_HEADER_LENGTH:I = 0x15

.field private static final GIF_HEADER_87A:[B

.field private static final GIF_HEADER_89A:[B

.field private static final GIF_HEADER_LENGTH:I = 0x6

.field private static final H264_HEADER:[B

.field private static final H264_HEADER_LENGTH:I

.field private static final HEIF_HEADER_LENGTH:I

.field private static final HEIF_HEADER_PREFIX:Ljava/lang/String; = "ftyp"

.field private static final HEIF_HEADER_SUFFIXES:[Ljava/lang/String;

.field private static final ICO_HEADER:[B

.field private static final ICO_HEADER_LENGTH:I

.field private static final JPEG_HEADER:[B

.field private static final JPEG_HEADER_LENGTH:I

.field private static final PNG_HEADER:[B

.field private static final PNG_HEADER_LENGTH:I

.field private static final SIMPLE_WEBP_HEADER_LENGTH:I = 0x14


# instance fields
.field final MAX_HEADER_LENGTH:I


# direct methods
.method static constructor <clinit>()V
    .registers 10

    const/4 v0, 0x3

    new-array v1, v0, [B

    .line 136
    fill-array-data v1, :array_74

    .line 137
    sput-object v1, Lcom/facebook/imageformat/DefaultImageFormatChecker;->JPEG_HEADER:[B

    sput v0, Lcom/facebook/imageformat/DefaultImageFormatChecker;->JPEG_HEADER_LENGTH:I

    const/16 v0, 0x8

    new-array v1, v0, [B

    .line 159
    fill-array-data v1, :array_7a

    .line 163
    sput-object v1, Lcom/facebook/imageformat/DefaultImageFormatChecker;->PNG_HEADER:[B

    sput v0, Lcom/facebook/imageformat/DefaultImageFormatChecker;->PNG_HEADER_LENGTH:I

    const-string v0, "GIF87a"

    .line 183
    invoke-static {v0}, Lcom/facebook/imageformat/ImageFormatCheckerUtils;->asciiBytes(Ljava/lang/String;)[B

    move-result-object v0

    sput-object v0, Lcom/facebook/imageformat/DefaultImageFormatChecker;->GIF_HEADER_87A:[B

    const-string v0, "GIF89a"

    .line 184
    invoke-static {v0}, Lcom/facebook/imageformat/ImageFormatCheckerUtils;->asciiBytes(Ljava/lang/String;)[B

    move-result-object v0

    sput-object v0, Lcom/facebook/imageformat/DefaultImageFormatChecker;->GIF_HEADER_89A:[B

    const-string v0, "BM"

    .line 206
    invoke-static {v0}, Lcom/facebook/imageformat/ImageFormatCheckerUtils;->asciiBytes(Ljava/lang/String;)[B

    move-result-object v0

    .line 207
    sput-object v0, Lcom/facebook/imageformat/DefaultImageFormatChecker;->BMP_HEADER:[B

    array-length v0, v0

    sput v0, Lcom/facebook/imageformat/DefaultImageFormatChecker;->BMP_HEADER_LENGTH:I

    const/4 v0, 0x4

    new-array v1, v0, [B

    .line 225
    fill-array-data v1, :array_82

    .line 228
    sput-object v1, Lcom/facebook/imageformat/DefaultImageFormatChecker;->ICO_HEADER:[B

    sput v0, Lcom/facebook/imageformat/DefaultImageFormatChecker;->ICO_HEADER_LENGTH:I

    const-string v2, "mif1"

    const-string v3, "msf1"

    const-string v4, "heic"

    const-string v5, "heix"

    const-string v6, "hevc"

    const-string v7, "hevx"

    const-string v8, "mif1"

    const-string v9, "msf1"

    .line 253
    filled-new-array/range {v2 .. v9}, [Ljava/lang/String;

    move-result-object v1

    sput-object v1, Lcom/facebook/imageformat/DefaultImageFormatChecker;->HEIF_HEADER_SUFFIXES:[Ljava/lang/String;

    .line 256
    new-instance v1, Ljava/lang/StringBuilder;

    const-string v2, "ftyp"

    invoke-direct {v1, v2}, Ljava/lang/StringBuilder;-><init>(Ljava/lang/String;)V

    sget-object v2, Lcom/facebook/imageformat/DefaultImageFormatChecker;->HEIF_HEADER_SUFFIXES:[Ljava/lang/String;

    const/4 v3, 0x0

    aget-object v2, v2, v3

    invoke-virtual {v1, v2}, Ljava/lang/StringBuilder;->append(Ljava/lang/String;)Ljava/lang/StringBuilder;

    invoke-virtual {v1}, Ljava/lang/StringBuilder;->toString()Ljava/lang/String;

    move-result-object v1

    .line 257
    invoke-static {v1}, Lcom/facebook/imageformat/ImageFormatCheckerUtils;->asciiBytes(Ljava/lang/String;)[B

    move-result-object v1

    array-length v1, v1

    sput v1, Lcom/facebook/imageformat/DefaultImageFormatChecker;->HEIF_HEADER_LENGTH:I

    new-array v1, v0, [B

    .line 303
    fill-array-data v1, :array_88

    .line 306
    sput-object v1, Lcom/facebook/imageformat/DefaultImageFormatChecker;->H264_HEADER:[B

    sput v0, Lcom/facebook/imageformat/DefaultImageFormatChecker;->H264_HEADER_LENGTH:I

    return-void

    :array_74
    .array-data 1
        -0x1t
        -0x28t
        -0x1t
    .end array-data

    :array_7a
    .array-data 1
        -0x77t
        0x50t
        0x4et
        0x47t
        0xdt
        0xat
        0x1at
        0xat
    .end array-data

    :array_82
    .array-data 1
        0x0t
        0x0t
        0x1t
        0x0t
    .end array-data

    :array_88
    .array-data 1
        0x0t
        0x0t
        0x0t
        0x1t
    .end array-data
.end method

.method public constructor <init>()V
    .registers 5

    .line 18
    invoke-direct {p0}, Ljava/lang/Object;-><init>()V

    const/16 v0, 0x9

    new-array v0, v0, [I

    const/4 v1, 0x0

    const/16 v2, 0x15

    aput v2, v0, v1

    const/4 v1, 0x1

    const/16 v2, 0x14

    aput v2, v0, v1

    .line 27
    sget v1, Lcom/facebook/imageformat/DefaultImageFormatChecker;->JPEG_HEADER_LENGTH:I

    const/4 v2, 0x2

    aput v1, v0, v2

    sget v1, Lcom/facebook/imageformat/DefaultImageFormatChecker;->PNG_HEADER_LENGTH:I

    const/4 v2, 0x3

    aput v1, v0, v2

    const/4 v1, 0x6

    const/4 v2, 0x4

    aput v1, v0, v2

    sget v2, Lcom/facebook/imageformat/DefaultImageFormatChecker;->BMP_HEADER_LENGTH:I

    const/4 v3, 0x5

    aput v2, v0, v3

    sget v2, Lcom/facebook/imageformat/DefaultImageFormatChecker;->ICO_HEADER_LENGTH:I

    aput v2, v0, v1

    sget v1, Lcom/facebook/imageformat/DefaultImageFormatChecker;->HEIF_HEADER_LENGTH:I

    const/4 v2, 0x7

    aput v1, v0, v2

    sget v1, Lcom/facebook/imageformat/DefaultImageFormatChecker;->H264_HEADER_LENGTH:I

    const/16 v2, 0x8

    aput v1, v0, v2

    .line 28
    invoke-static {v0}, Lcom/facebook/common/internal/Ints;->max([I)I

    move-result v0

    iput v0, p0, Lcom/facebook/imageformat/DefaultImageFormatChecker;->MAX_HEADER_LENGTH:I

    return-void
.end method

.method private static getWebpFormat([BI)Lcom/facebook/imageformat/ImageFormat;
    .registers 4

    const/4 v0, 0x0

    .line 110
    invoke-static {p0, v0, p1}, Lcom/facebook/common/webp/WebpSupportStatus;->isWebpHeader([BII)Z

    move-result v1

    invoke-static {v1}, Lcom/facebook/common/internal/Preconditions;->checkArgument(Z)V

    .line 111
    invoke-static {p0, v0}, Lcom/facebook/common/webp/WebpSupportStatus;->isSimpleWebpHeader([BI)Z

    move-result v1

    if-eqz v1, :cond_11

    .line 112
    sget-object p0, Lcom/facebook/imageformat/DefaultImageFormats;->WEBP_SIMPLE:Lcom/facebook/imageformat/ImageFormat;

    return-object p0

    .line 115
    :cond_11
    invoke-static {p0, v0}, Lcom/facebook/common/webp/WebpSupportStatus;->isLosslessWebpHeader([BI)Z

    move-result v1

    if-eqz v1, :cond_1a

    .line 116
    sget-object p0, Lcom/facebook/imageformat/DefaultImageFormats;->WEBP_LOSSLESS:Lcom/facebook/imageformat/ImageFormat;

    return-object p0

    .line 119
    :cond_1a
    invoke-static {p0, v0, p1}, Lcom/facebook/common/webp/WebpSupportStatus;->isExtendedWebpHeader([BII)Z

    move-result p1

    if-eqz p1, :cond_35

    .line 120
    invoke-static {p0, v0}, Lcom/facebook/common/webp/WebpSupportStatus;->isAnimatedWebpHeader([BI)Z

    move-result p1

    if-eqz p1, :cond_29

    .line 121
    sget-object p0, Lcom/facebook/imageformat/DefaultImageFormats;->WEBP_ANIMATED:Lcom/facebook/imageformat/ImageFormat;

    return-object p0

    .line 123
    :cond_29
    invoke-static {p0, v0}, Lcom/facebook/common/webp/WebpSupportStatus;->isExtendedWebpHeaderWithAlpha([BI)Z

    move-result p0

    if-eqz p0, :cond_32

    .line 124
    sget-object p0, Lcom/facebook/imageformat/DefaultImageFormats;->WEBP_EXTENDED_WITH_ALPHA:Lcom/facebook/imageformat/ImageFormat;

    return-object p0

    .line 126
    :cond_32
    sget-object p0, Lcom/facebook/imageformat/DefaultImageFormats;->WEBP_EXTENDED:Lcom/facebook/imageformat/ImageFormat;

    return-object p0

    .line 129
    :cond_35
    sget-object p0, Lcom/facebook/imageformat/ImageFormat;->UNKNOWN:Lcom/facebook/imageformat/ImageFormat;

    return-object p0
.end method

.method private static isBmpHeader([BI)Z
    .registers 4

    .line 218
    sget-object v0, Lcom/facebook/imageformat/DefaultImageFormatChecker;->BMP_HEADER:[B

    array-length v1, v0

    if-ge p1, v1, :cond_7

    const/4 p0, 0x0

    return p0

    .line 221
    :cond_7
    invoke-static {p0, v0}, Lcom/facebook/imageformat/ImageFormatCheckerUtils;->startsWithPattern([B[B)Z

    move-result p0

    return p0
.end method

.method private static isGifHeader([BI)Z
    .registers 4

    const/4 v0, 0x0

    const/4 v1, 0x6

    if-ge p1, v1, :cond_5

    return v0

    .line 199
    :cond_5
    sget-object p1, Lcom/facebook/imageformat/DefaultImageFormatChecker;->GIF_HEADER_87A:[B

    invoke-static {p0, p1}, Lcom/facebook/imageformat/ImageFormatCheckerUtils;->startsWithPattern([B[B)Z

    move-result p1

    if-nez p1, :cond_17

    sget-object p1, Lcom/facebook/imageformat/DefaultImageFormatChecker;->GIF_HEADER_89A:[B

    .line 200
    invoke-static {p0, p1}, Lcom/facebook/imageformat/ImageFormatCheckerUtils;->startsWithPattern([B[B)Z

    move-result p0

    if-eqz p0, :cond_16

    goto :goto_17

    :cond_16
    return v0

    :cond_17
    :goto_17
    const/4 p0, 0x1

    return p0
.end method

.method private static isH264Header([BI)Z
    .registers 3

    .line 309
    sget v0, Lcom/facebook/imageformat/DefaultImageFormatChecker;->H264_HEADER_LENGTH:I

    if-ge p1, v0, :cond_6

    const/4 p0, 0x0

    return p0

    .line 312
    :cond_6
    sget-object p1, Lcom/facebook/imageformat/DefaultImageFormatChecker;->H264_HEADER:[B

    invoke-static {p0, p1}, Lcom/facebook/imageformat/ImageFormatCheckerUtils;->startsWithPattern([B[B)Z

    move-result p0

    return p0
.end method

.method private static isHeifHeader([BI)Z
    .registers 8

    .line 269
    sget v0, Lcom/facebook/imageformat/DefaultImageFormatChecker;->HEIF_HEADER_LENGTH:I

    const/4 v1, 0x0

    if-ge p1, v0, :cond_6

    return v1

    :cond_6
    const/4 p1, 0x3

    .line 273
    aget-byte p1, p0, p1

    const/16 v0, 0x8

    if-ge p1, v0, :cond_e

    return v1

    .line 278
    :cond_e
    sget-object p1, Lcom/facebook/imageformat/DefaultImageFormatChecker;->HEIF_HEADER_SUFFIXES:[Ljava/lang/String;

    array-length v0, p1

    const/4 v2, 0x0

    :goto_12
    if-ge v2, v0, :cond_32

    aget-object v3, p1, v2

    .line 279
    array-length v4, p0

    invoke-static {v3}, Ljava/lang/String;->valueOf(Ljava/lang/Object;)Ljava/lang/String;

    move-result-object v3

    const-string v5, "ftyp"

    invoke-virtual {v5, v3}, Ljava/lang/String;->concat(Ljava/lang/String;)Ljava/lang/String;

    move-result-object v3

    .line 283
    invoke-static {v3}, Lcom/facebook/imageformat/ImageFormatCheckerUtils;->asciiBytes(Ljava/lang/String;)[B

    move-result-object v3

    sget v5, Lcom/facebook/imageformat/DefaultImageFormatChecker;->HEIF_HEADER_LENGTH:I

    .line 280
    invoke-static {p0, v4, v3, v5}, Lcom/facebook/imageformat/ImageFormatCheckerUtils;->indexOfPattern([BI[BI)I

    move-result v3

    if-ltz v3, :cond_2f

    const/4 p0, 0x1

    return p0

    :cond_2f
    add-int/lit8 v2, v2, 0x1

    goto :goto_12

    :cond_32
    return v1
.end method

.method private static isIcoHeader([BI)Z
    .registers 4

    .line 240
    sget-object v0, Lcom/facebook/imageformat/DefaultImageFormatChecker;->ICO_HEADER:[B

    array-length v1, v0

    if-ge p1, v1, :cond_7

    const/4 p0, 0x0

    return p0

    .line 243
    :cond_7
    invoke-static {p0, v0}, Lcom/facebook/imageformat/ImageFormatCheckerUtils;->startsWithPattern([B[B)Z

    move-result p0

    return p0
.end method

.method private static isJpegHeader([BI)Z
    .registers 4

    .line 151
    sget-object v0, Lcom/facebook/imageformat/DefaultImageFormatChecker;->JPEG_HEADER:[B

    array-length v1, v0

    if-lt p1, v1, :cond_d

    .line 152
    invoke-static {p0, v0}, Lcom/facebook/imageformat/ImageFormatCheckerUtils;->startsWithPattern([B[B)Z

    move-result p0

    if-eqz p0, :cond_d

    const/4 p0, 0x1

    return p0

    :cond_d
    const/4 p0, 0x0

    return p0
.end method

.method private static isPngHeader([BI)Z
    .registers 4

    .line 175
    sget-object v0, Lcom/facebook/imageformat/DefaultImageFormatChecker;->PNG_HEADER:[B

    array-length v1, v0

    if-lt p1, v1, :cond_d

    .line 176
    invoke-static {p0, v0}, Lcom/facebook/imageformat/ImageFormatCheckerUtils;->startsWithPattern([B[B)Z

    move-result p0

    if-eqz p0, :cond_d

    const/4 p0, 0x1

    return p0

    :cond_d
    const/4 p0, 0x0

    return p0
.end method


# virtual methods
.method public final determineFormat([BI)Lcom/facebook/imageformat/ImageFormat;
    .registers 4

    .line 55
    invoke-static {p1}, Lcom/facebook/common/internal/Preconditions;->checkNotNull(Ljava/lang/Object;)Ljava/lang/Object;

    const/4 v0, 0x0

    .line 57
    invoke-static {p1, v0, p2}, Lcom/facebook/common/webp/WebpSupportStatus;->isWebpHeader([BII)Z

    move-result v0

    if-eqz v0, :cond_f

    .line 58
    invoke-static {p1, p2}, Lcom/facebook/imageformat/DefaultImageFormatChecker;->getWebpFormat([BI)Lcom/facebook/imageformat/ImageFormat;

    move-result-object p1

    return-object p1

    .line 61
    :cond_f
    invoke-static {p1, p2}, Lcom/facebook/imageformat/DefaultImageFormatChecker;->isJpegHeader([BI)Z

    move-result v0

    if-eqz v0, :cond_18

    .line 62
    sget-object p1, Lcom/facebook/imageformat/DefaultImageFormats;->JPEG:Lcom/facebook/imageformat/ImageFormat;

    return-object p1

    .line 65
    :cond_18
    invoke-static {p1, p2}, Lcom/facebook/imageformat/DefaultImageFormatChecker;->isPngHeader([BI)Z

    move-result v0

    if-eqz v0, :cond_21

    .line 66
    sget-object p1, Lcom/facebook/imageformat/DefaultImageFormats;->PNG:Lcom/facebook/imageformat/ImageFormat;

    return-object p1

    .line 69
    :cond_21
    invoke-static {p1, p2}, Lcom/facebook/imageformat/DefaultImageFormatChecker;->isGifHeader([BI)Z

    move-result v0

    if-eqz v0, :cond_2a

    .line 70
    sget-object p1, Lcom/facebook/imageformat/DefaultImageFormats;->GIF:Lcom/facebook/imageformat/ImageFormat;

    return-object p1

    .line 73
    :cond_2a
    invoke-static {p1, p2}, Lcom/facebook/imageformat/DefaultImageFormatChecker;->isBmpHeader([BI)Z

    move-result v0

    if-eqz v0, :cond_33

    .line 74
    sget-object p1, Lcom/facebook/imageformat/DefaultImageFormats;->BMP:Lcom/facebook/imageformat/ImageFormat;

    return-object p1

    .line 77
    :cond_33
    invoke-static {p1, p2}, Lcom/facebook/imageformat/DefaultImageFormatChecker;->isIcoHeader([BI)Z

    move-result v0

    if-eqz v0, :cond_3c

    .line 78
    sget-object p1, Lcom/facebook/imageformat/DefaultImageFormats;->ICO:Lcom/facebook/imageformat/ImageFormat;

    return-object p1

    .line 81
    :cond_3c
    invoke-static {p1, p2}, Lcom/facebook/imageformat/DefaultImageFormatChecker;->isHeifHeader([BI)Z

    move-result v0

    if-eqz v0, :cond_45

    .line 82
    sget-object p1, Lcom/facebook/imageformat/DefaultImageFormats;->HEIF:Lcom/facebook/imageformat/ImageFormat;

    return-object p1

    .line 85
    :cond_45
    invoke-static {p1, p2}, Lcom/facebook/imageformat/DefaultImageFormatChecker;->isH264Header([BI)Z

    move-result p1

    if-eqz p1, :cond_4e

    .line 86
    sget-object p1, Lcom/facebook/imageformat/DefaultImageFormats;->H264:Lcom/facebook/imageformat/ImageFormat;

    return-object p1

    .line 89
    :cond_4e
    sget-object p1, Lcom/facebook/imageformat/ImageFormat;->UNKNOWN:Lcom/facebook/imageformat/ImageFormat;

    return-object p1
.end method

.method public getHeaderSize()I
    .registers 2

    .line 41
    iget v0, p0, Lcom/facebook/imageformat/DefaultImageFormatChecker;->MAX_HEADER_LENGTH:I

    return v0
.end method