WebpSupportStatus.smali

.class public Lcom/facebook/common/webp/WebpSupportStatus;
.super Ljava/lang/Object;
.source "SourceFile"


# static fields
.field private static final EXTENDED_WEBP_HEADER_LENGTH:I = 0x15

.field private static final SIMPLE_WEBP_HEADER_LENGTH:I = 0x14

.field private static final VP8X_WEBP_BASE64:Ljava/lang/String; = "UklGRkoAAABXRUJQVlA4WAoAAAAQAAAAAAAAAAAAQUxQSAwAAAARBxAR/Q9ERP8DAABWUDggGAAAABQBAJ0BKgEAAQAAAP4AAA3AAP7mtQAAAA=="

.field private static final WEBP_NAME_BYTES:[B

.field private static final WEBP_RIFF_BYTES:[B

.field private static final WEBP_VP8L_BYTES:[B

.field private static final WEBP_VP8X_BYTES:[B

.field private static final WEBP_VP8_BYTES:[B

.field public static final sIsExtendedWebpSupported:Z

.field public static final sIsSimpleWebpSupported:Z

.field public static final sIsWebpSupportRequired:Z

.field public static sWebpBitmapFactory:Lcom/facebook/common/webp/WebpBitmapFactory;

.field private static sWebpLibraryChecked:Z


# direct methods
.method public static constructor <clinit>()V
    .registers 2

    const/4 v0, 0x0

    .line 1
    sput-boolean v0, Lcom/facebook/common/webp/WebpSupportStatus;->sIsWebpSupportRequired:Z

    const/4 v1, 0x1

    .line 2
    sput-boolean v1, Lcom/facebook/common/webp/WebpSupportStatus;->sIsSimpleWebpSupported:Z

    .line 3
    invoke-static {}, Lcom/facebook/common/webp/WebpSupportStatus;->isExtendedWebpSupported()Z

    move-result v1

    sput-boolean v1, Lcom/facebook/common/webp/WebpSupportStatus;->sIsExtendedWebpSupported:Z

    const/4 v1, 0x0

    .line 4
    sput-object v1, Lcom/facebook/common/webp/WebpSupportStatus;->sWebpBitmapFactory:Lcom/facebook/common/webp/WebpBitmapFactory;

    .line 5
    sput-boolean v0, Lcom/facebook/common/webp/WebpSupportStatus;->sWebpLibraryChecked:Z

    const-string v0, "RIFF"

    .line 6
    invoke-static {v0}, Lcom/facebook/common/webp/WebpSupportStatus;->asciiBytes(Ljava/lang/String;)[B

    move-result-object v0

    sput-object v0, Lcom/facebook/common/webp/WebpSupportStatus;->WEBP_RIFF_BYTES:[B

    const-string v0, "WEBP"

    .line 7
    invoke-static {v0}, Lcom/facebook/common/webp/WebpSupportStatus;->asciiBytes(Ljava/lang/String;)[B

    move-result-object v0

    sput-object v0, Lcom/facebook/common/webp/WebpSupportStatus;->WEBP_NAME_BYTES:[B

    const-string v0, "VP8 "

    .line 8
    invoke-static {v0}, Lcom/facebook/common/webp/WebpSupportStatus;->asciiBytes(Ljava/lang/String;)[B

    move-result-object v0

    sput-object v0, Lcom/facebook/common/webp/WebpSupportStatus;->WEBP_VP8_BYTES:[B

    const-string v0, "VP8L"

    .line 9
    invoke-static {v0}, Lcom/facebook/common/webp/WebpSupportStatus;->asciiBytes(Ljava/lang/String;)[B

    move-result-object v0

    sput-object v0, Lcom/facebook/common/webp/WebpSupportStatus;->WEBP_VP8L_BYTES:[B

    const-string v0, "VP8X"

    .line 10
    invoke-static {v0}, Lcom/facebook/common/webp/WebpSupportStatus;->asciiBytes(Ljava/lang/String;)[B

    move-result-object v0

    sput-object v0, Lcom/facebook/common/webp/WebpSupportStatus;->WEBP_VP8X_BYTES:[B

    return-void
.end method

.method public constructor <init>()V
    .registers 1

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

    return-void
.end method

.method private static asciiBytes(Ljava/lang/String;)[B
    .registers 3

    :try_start_0
    const-string v0, "ASCII"

    .line 1
    invoke-virtual {p0, v0}, Ljava/lang/String;->getBytes(Ljava/lang/String;)[B

    move-result-object p0
    :try_end_6
    .catch Ljava/io/UnsupportedEncodingException; {:try_start_0 .. :try_end_6} :catch_7

    return-object p0

    :catch_7
    move-exception p0

    .line 2
    new-instance v0, Ljava/lang/RuntimeException;

    const-string v1, "ASCII not found!"

    invoke-direct {v0, v1, p0}, Ljava/lang/RuntimeException;-><init>(Ljava/lang/String;Ljava/lang/Throwable;)V

    throw v0
.end method

.method public static isAnimatedWebpHeader([BI)Z
    .registers 5

    add-int/lit8 v0, p1, 0xc

    .line 1
    sget-object v1, Lcom/facebook/common/webp/WebpSupportStatus;->WEBP_VP8X_BYTES:[B

    invoke-static {p0, v0, v1}, Lcom/facebook/common/webp/WebpSupportStatus;->matchBytePattern([BI[B)Z

    move-result v0

    add-int/lit8 p1, p1, 0x14

    .line 2
    aget-byte p0, p0, p1

    const/4 p1, 0x2

    and-int/2addr p0, p1

    const/4 v1, 0x1

    const/4 v2, 0x0

    if-ne p0, p1, :cond_14

    const/4 p0, 0x1

    goto :goto_15

    :cond_14
    const/4 p0, 0x0

    :goto_15
    if-eqz v0, :cond_1a

    if-eqz p0, :cond_1a

    goto :goto_1b

    :cond_1a
    const/4 v1, 0x0

    :goto_1b
    return v1
.end method

.method public static isExtendedWebpHeader([BII)Z
    .registers 4

    const/16 v0, 0x15

    if-lt p2, v0, :cond_10

    add-int/lit8 p1, p1, 0xc

    .line 1
    sget-object p2, Lcom/facebook/common/webp/WebpSupportStatus;->WEBP_VP8X_BYTES:[B

    .line 2
    invoke-static {p0, p1, p2}, Lcom/facebook/common/webp/WebpSupportStatus;->matchBytePattern([BI[B)Z

    move-result p0

    if-eqz p0, :cond_10

    const/4 p0, 0x1

    goto :goto_11

    :cond_10
    const/4 p0, 0x0

    :goto_11
    return p0
.end method

.method public static isExtendedWebpHeaderWithAlpha([BI)Z
    .registers 5

    add-int/lit8 v0, p1, 0xc

    .line 1
    sget-object v1, Lcom/facebook/common/webp/WebpSupportStatus;->WEBP_VP8X_BYTES:[B

    invoke-static {p0, v0, v1}, Lcom/facebook/common/webp/WebpSupportStatus;->matchBytePattern([BI[B)Z

    move-result v0

    add-int/lit8 p1, p1, 0x14

    .line 2
    aget-byte p0, p0, p1

    const/16 p1, 0x10

    and-int/2addr p0, p1

    const/4 v1, 0x1

    const/4 v2, 0x0

    if-ne p0, p1, :cond_15

    const/4 p0, 0x1

    goto :goto_16

    :cond_15
    const/4 p0, 0x0

    :goto_16
    if-eqz v0, :cond_1b

    if-eqz p0, :cond_1b

    goto :goto_1c

    :cond_1b
    const/4 v1, 0x0

    :goto_1c
    return v1
.end method

.method private static isExtendedWebpSupported()Z
    .registers 1

    const/4 v0, 0x1

    return v0
.end method

.method public static isLosslessWebpHeader([BI)Z
    .registers 3

    add-int/lit8 p1, p1, 0xc

    sget-object v0, Lcom/facebook/common/webp/WebpSupportStatus;->WEBP_VP8L_BYTES:[B

    invoke-static {p0, p1, v0}, Lcom/facebook/common/webp/WebpSupportStatus;->matchBytePattern([BI[B)Z

    move-result p0

    return p0
.end method

.method public static isSimpleWebpHeader([BI)Z
    .registers 3

    add-int/lit8 p1, p1, 0xc

    sget-object v0, Lcom/facebook/common/webp/WebpSupportStatus;->WEBP_VP8_BYTES:[B

    invoke-static {p0, p1, v0}, Lcom/facebook/common/webp/WebpSupportStatus;->matchBytePattern([BI[B)Z

    move-result p0

    return p0
.end method

.method public static isWebpHeader([BII)Z
    .registers 4

    const/16 v0, 0x14

    if-lt p2, v0, :cond_18

    .line 1
    sget-object p2, Lcom/facebook/common/webp/WebpSupportStatus;->WEBP_RIFF_BYTES:[B

    .line 2
    invoke-static {p0, p1, p2}, Lcom/facebook/common/webp/WebpSupportStatus;->matchBytePattern([BI[B)Z

    move-result p2

    if-eqz p2, :cond_18

    add-int/lit8 p1, p1, 0x8

    sget-object p2, Lcom/facebook/common/webp/WebpSupportStatus;->WEBP_NAME_BYTES:[B

    .line 3
    invoke-static {p0, p1, p2}, Lcom/facebook/common/webp/WebpSupportStatus;->matchBytePattern([BI[B)Z

    move-result p0

    if-eqz p0, :cond_18

    const/4 p0, 0x1

    goto :goto_19

    :cond_18
    const/4 p0, 0x0

    :goto_19
    return p0
.end method

.method public static isWebpSupportedByPlatform([BII)Z
    .registers 4

    .line 1
    invoke-static {p0, p1}, Lcom/facebook/common/webp/WebpSupportStatus;->isSimpleWebpHeader([BI)Z

    move-result v0

    if-eqz v0, :cond_9

    .line 2
    sget-boolean p0, Lcom/facebook/common/webp/WebpSupportStatus;->sIsSimpleWebpSupported:Z

    return p0

    .line 3
    :cond_9
    invoke-static {p0, p1}, Lcom/facebook/common/webp/WebpSupportStatus;->isLosslessWebpHeader([BI)Z

    move-result v0

    if-eqz v0, :cond_12

    .line 4
    sget-boolean p0, Lcom/facebook/common/webp/WebpSupportStatus;->sIsExtendedWebpSupported:Z

    return p0

    .line 5
    :cond_12
    invoke-static {p0, p1, p2}, Lcom/facebook/common/webp/WebpSupportStatus;->isExtendedWebpHeader([BII)Z

    move-result p2

    const/4 v0, 0x0

    if-eqz p2, :cond_23

    .line 6
    invoke-static {p0, p1}, Lcom/facebook/common/webp/WebpSupportStatus;->isAnimatedWebpHeader([BI)Z

    move-result p0

    if-eqz p0, :cond_20

    return v0

    .line 7
    :cond_20
    sget-boolean p0, Lcom/facebook/common/webp/WebpSupportStatus;->sIsExtendedWebpSupported:Z

    return p0

    :cond_23
    return v0
.end method

.method public static loadWebpBitmapFactoryIfExists()Lcom/facebook/common/webp/WebpBitmapFactory;
    .registers 2

    .line 1
    sget-boolean v0, Lcom/facebook/common/webp/WebpSupportStatus;->sWebpLibraryChecked:Z

    if-eqz v0, :cond_7

    .line 2
    sget-object v0, Lcom/facebook/common/webp/WebpSupportStatus;->sWebpBitmapFactory:Lcom/facebook/common/webp/WebpBitmapFactory;

    return-object v0

    :cond_7
    const/4 v0, 0x0

    :try_start_8
    const-string v1, "com.facebook.webpsupport.WebpBitmapFactoryImpl"

    .line 3
    invoke-static {v1}, Ljava/lang/Class;->forName(Ljava/lang/String;)Ljava/lang/Class;

    move-result-object v1

    .line 4
    invoke-virtual {v1}, Ljava/lang/Class;->newInstance()Ljava/lang/Object;

    move-result-object v1

    check-cast v1, Lcom/facebook/common/webp/WebpBitmapFactory;
    :try_end_14
    .catchall {:try_start_8 .. :try_end_14} :catchall_15

    move-object v0, v1

    :catchall_15
    const/4 v1, 0x1

    .line 5
    sput-boolean v1, Lcom/facebook/common/webp/WebpSupportStatus;->sWebpLibraryChecked:Z

    return-object v0
.end method

.method private static matchBytePattern([BI[B)Z
    .registers 7

    const/4 v0, 0x0

    if-eqz p2, :cond_1e

    if-nez p0, :cond_6

    goto :goto_1e

    .line 1
    :cond_6
    array-length v1, p2

    add-int/2addr v1, p1

    array-length v2, p0

    if-le v1, v2, :cond_c

    return v0

    :cond_c
    const/4 v1, 0x0

    .line 2
    :goto_d
    array-length v2, p2

    if-ge v1, v2, :cond_1c

    add-int v2, v1, p1

    .line 3
    aget-byte v2, p0, v2

    aget-byte v3, p2, v1

    if-eq v2, v3, :cond_19

    return v0

    :cond_19
    add-int/lit8 v1, v1, 0x1

    goto :goto_d

    :cond_1c
    const/4 p0, 0x1

    return p0

    :cond_1e
    :goto_1e
    return v0
.end method