WebpUtil.smali

.class public Lcom/facebook/imageutils/WebpUtil;
.super Ljava/lang/Object;
.source "WebpUtil.java"


# static fields
.field private static final VP8L_HEADER:Ljava/lang/String; = "VP8L"

.field private static final VP8X_HEADER:Ljava/lang/String; = "VP8X"

.field private static final VP8_HEADER:Ljava/lang/String; = "VP8 "


# direct methods
.method private constructor <init>()V
    .registers 1

    .line 29
    invoke-direct {p0}, Ljava/lang/Object;-><init>()V

    return-void
.end method

.method private static compare([BLjava/lang/String;)Z
    .registers 6
    .annotation system Ldalvik/annotation/MethodParameters;
        accessFlags = {
            0x0,
            0x0
        }
        names = {
            "what",
            "with"
        }
    .end annotation

    .line 153
    array-length v0, p0

    invoke-virtual {p1}, Ljava/lang/String;->length()I

    move-result v1

    const/4 v2, 0x0

    if-eq v0, v1, :cond_9

    return v2

    :cond_9
    move v0, v2

    .line 156
    :goto_a
    array-length v1, p0

    if-ge v0, v1, :cond_19

    .line 157
    invoke-virtual {p1, v0}, Ljava/lang/String;->charAt(I)C

    move-result v1

    aget-byte v3, p0, v0

    if-eq v1, v3, :cond_16

    return v2

    :cond_16
    add-int/lit8 v0, v0, 0x1

    goto :goto_a

    :cond_19
    const/4 p0, 0x1

    return p0
.end method

.method public static get2BytesAsInt(Ljava/io/InputStream;)I
    .registers 3
    .annotation system Ldalvik/annotation/MethodParameters;
        accessFlags = {
            0x0
        }
        names = {
            "is"
        }
    .end annotation

    .annotation system Ldalvik/annotation/Throws;
        value = {
            Ljava/io/IOException;
        }
    .end annotation

    .line 184
    invoke-virtual {p0}, Ljava/io/InputStream;->read()I

    move-result v0

    int-to-byte v0, v0

    .line 185
    invoke-virtual {p0}, Ljava/io/InputStream;->read()I

    move-result p0

    int-to-byte p0, p0

    shl-int/lit8 p0, p0, 0x8

    const v1, 0xff00

    and-int/2addr p0, v1

    and-int/lit16 v0, v0, 0xff

    or-int/2addr p0, v0

    return p0
.end method

.method private static getByte(Ljava/io/InputStream;)B
    .registers 1
    .annotation system Ldalvik/annotation/MethodParameters;
        accessFlags = {
            0x0
        }
        names = {
            "is"
        }
    .end annotation

    .annotation system Ldalvik/annotation/Throws;
        value = {
            Ljava/io/IOException;
        }
    .end annotation

    .line 203
    invoke-virtual {p0}, Ljava/io/InputStream;->read()I

    move-result p0

    and-int/lit16 p0, p0, 0xff

    int-to-byte p0, p0

    return p0
.end method

.method private static getHeader([B)Ljava/lang/String;
    .registers 4
    .annotation system Ldalvik/annotation/MethodParameters;
        accessFlags = {
            0x0
        }
        names = {
            "header"
        }
    .end annotation

    .line 165
    new-instance v0, Ljava/lang/StringBuilder;

    invoke-direct {v0}, Ljava/lang/StringBuilder;-><init>()V

    const/4 v1, 0x0

    .line 166
    :goto_6
    array-length v2, p0

    if-ge v1, v2, :cond_12

    .line 167
    aget-byte v2, p0, v1

    int-to-char v2, v2

    invoke-virtual {v0, v2}, Ljava/lang/StringBuilder;->append(C)Ljava/lang/StringBuilder;

    add-int/lit8 v1, v1, 0x1

    goto :goto_6

    .line 169
    :cond_12
    invoke-virtual {v0}, Ljava/lang/StringBuilder;->toString()Ljava/lang/String;

    move-result-object p0

    return-object p0
.end method

.method private static getInt(Ljava/io/InputStream;)I
    .registers 5
    .annotation system Ldalvik/annotation/MethodParameters;
        accessFlags = {
            0x0
        }
        names = {
            "is"
        }
    .end annotation

    .annotation system Ldalvik/annotation/Throws;
        value = {
            Ljava/io/IOException;
        }
    .end annotation

    .line 173
    invoke-virtual {p0}, Ljava/io/InputStream;->read()I

    move-result v0

    int-to-byte v0, v0

    .line 174
    invoke-virtual {p0}, Ljava/io/InputStream;->read()I

    move-result v1

    int-to-byte v1, v1

    .line 175
    invoke-virtual {p0}, Ljava/io/InputStream;->read()I

    move-result v2

    int-to-byte v2, v2

    .line 176
    invoke-virtual {p0}, Ljava/io/InputStream;->read()I

    move-result p0

    int-to-byte p0, p0

    shl-int/lit8 p0, p0, 0x18

    const/high16 v3, -0x1000000

    and-int/2addr p0, v3

    shl-int/lit8 v2, v2, 0x10

    const/high16 v3, 0xff0000

    and-int/2addr v2, v3

    or-int/2addr p0, v2

    shl-int/lit8 v1, v1, 0x8

    const v2, 0xff00

    and-int/2addr v1, v2

    or-int/2addr p0, v1

    and-int/lit16 v0, v0, 0xff

    or-int/2addr p0, v0

    return p0
.end method

.method private static getShort(Ljava/io/InputStream;)S
    .registers 1
    .annotation system Ldalvik/annotation/MethodParameters;
        accessFlags = {
            0x0
        }
        names = {
            "is"
        }
    .end annotation

    .annotation system Ldalvik/annotation/Throws;
        value = {
            Ljava/io/IOException;
        }
    .end annotation

    .line 199
    invoke-virtual {p0}, Ljava/io/InputStream;->read()I

    move-result p0

    and-int/lit16 p0, p0, 0xff

    int-to-short p0, p0

    return p0
.end method

.method public static getSize(Ljava/io/InputStream;)Landroid/util/Pair;
    .registers 4
    .annotation system Ldalvik/annotation/MethodParameters;
        accessFlags = {
            0x0
        }
        names = {
            "is"
        }
    .end annotation

    .annotation system Ldalvik/annotation/Signature;
        value = {
            "(",
            "Ljava/io/InputStream;",
            ")",
            "Landroid/util/Pair<",
            "Ljava/lang/Integer;",
            "Ljava/lang/Integer;",
            ">;"
        }
    .end annotation

    .annotation runtime Ljavax/annotation/Nullable;
    .end annotation

    const/4 v0, 0x4

    new-array v0, v0, [B

    const/4 v1, 0x0

    .line 45
    :try_start_4
    invoke-virtual {p0, v0}, Ljava/io/InputStream;->read([B)I

    const-string v2, "RIFF"

    .line 47
    invoke-static {v0, v2}, Lcom/facebook/imageutils/WebpUtil;->compare([BLjava/lang/String;)Z

    move-result v2
    :try_end_d
    .catch Ljava/io/IOException; {:try_start_4 .. :try_end_d} :catch_87
    .catchall {:try_start_4 .. :try_end_d} :catchall_85

    if-nez v2, :cond_1a

    if-eqz p0, :cond_19

    .line 72
    :try_start_11
    invoke-virtual {p0}, Ljava/io/InputStream;->close()V
    :try_end_14
    .catch Ljava/io/IOException; {:try_start_11 .. :try_end_14} :catch_15

    goto :goto_19

    :catch_15
    move-exception p0

    .line 74
    invoke-virtual {p0}, Ljava/io/IOException;->printStackTrace()V

    :cond_19
    :goto_19
    return-object v1

    .line 51
    :cond_1a
    :try_start_1a
    invoke-static {p0}, Lcom/facebook/imageutils/WebpUtil;->getInt(Ljava/io/InputStream;)I

    .line 53
    invoke-virtual {p0, v0}, Ljava/io/InputStream;->read([B)I

    const-string v2, "WEBP"

    .line 54
    invoke-static {v0, v2}, Lcom/facebook/imageutils/WebpUtil;->compare([BLjava/lang/String;)Z

    move-result v2
    :try_end_26
    .catch Ljava/io/IOException; {:try_start_1a .. :try_end_26} :catch_87
    .catchall {:try_start_1a .. :try_end_26} :catchall_85

    if-nez v2, :cond_33

    if-eqz p0, :cond_32

    .line 72
    :try_start_2a
    invoke-virtual {p0}, Ljava/io/InputStream;->close()V
    :try_end_2d
    .catch Ljava/io/IOException; {:try_start_2a .. :try_end_2d} :catch_2e

    goto :goto_32

    :catch_2e
    move-exception p0

    .line 74
    invoke-virtual {p0}, Ljava/io/IOException;->printStackTrace()V

    :cond_32
    :goto_32
    return-object v1

    .line 58
    :cond_33
    :try_start_33
    invoke-virtual {p0, v0}, Ljava/io/InputStream;->read([B)I

    .line 59
    invoke-static {v0}, Lcom/facebook/imageutils/WebpUtil;->getHeader([B)Ljava/lang/String;

    move-result-object v0

    const-string v2, "VP8 "

    .line 60
    invoke-virtual {v2, v0}, Ljava/lang/String;->equals(Ljava/lang/Object;)Z

    move-result v2

    if-eqz v2, :cond_51

    .line 61
    invoke-static {p0}, Lcom/facebook/imageutils/WebpUtil;->getVP8Dimension(Ljava/io/InputStream;)Landroid/util/Pair;

    move-result-object v0
    :try_end_46
    .catch Ljava/io/IOException; {:try_start_33 .. :try_end_46} :catch_87
    .catchall {:try_start_33 .. :try_end_46} :catchall_85

    if-eqz p0, :cond_50

    .line 72
    :try_start_48
    invoke-virtual {p0}, Ljava/io/InputStream;->close()V
    :try_end_4b
    .catch Ljava/io/IOException; {:try_start_48 .. :try_end_4b} :catch_4c

    goto :goto_50

    :catch_4c
    move-exception p0

    .line 74
    invoke-virtual {p0}, Ljava/io/IOException;->printStackTrace()V

    :cond_50
    :goto_50
    return-object v0

    :cond_51
    :try_start_51
    const-string v2, "VP8L"

    .line 62
    invoke-virtual {v2, v0}, Ljava/lang/String;->equals(Ljava/lang/Object;)Z

    move-result v2

    if-eqz v2, :cond_68

    .line 63
    invoke-static {p0}, Lcom/facebook/imageutils/WebpUtil;->getVP8LDimension(Ljava/io/InputStream;)Landroid/util/Pair;

    move-result-object v0
    :try_end_5d
    .catch Ljava/io/IOException; {:try_start_51 .. :try_end_5d} :catch_87
    .catchall {:try_start_51 .. :try_end_5d} :catchall_85

    if-eqz p0, :cond_67

    .line 72
    :try_start_5f
    invoke-virtual {p0}, Ljava/io/InputStream;->close()V
    :try_end_62
    .catch Ljava/io/IOException; {:try_start_5f .. :try_end_62} :catch_63

    goto :goto_67

    :catch_63
    move-exception p0

    .line 74
    invoke-virtual {p0}, Ljava/io/IOException;->printStackTrace()V

    :cond_67
    :goto_67
    return-object v0

    :cond_68
    :try_start_68
    const-string v2, "VP8X"

    .line 64
    invoke-virtual {v2, v0}, Ljava/lang/String;->equals(Ljava/lang/Object;)Z

    move-result v0

    if-eqz v0, :cond_7f

    .line 65
    invoke-static {p0}, Lcom/facebook/imageutils/WebpUtil;->getVP8XDimension(Ljava/io/InputStream;)Landroid/util/Pair;

    move-result-object v0
    :try_end_74
    .catch Ljava/io/IOException; {:try_start_68 .. :try_end_74} :catch_87
    .catchall {:try_start_68 .. :try_end_74} :catchall_85

    if-eqz p0, :cond_7e

    .line 72
    :try_start_76
    invoke-virtual {p0}, Ljava/io/InputStream;->close()V
    :try_end_79
    .catch Ljava/io/IOException; {:try_start_76 .. :try_end_79} :catch_7a

    goto :goto_7e

    :catch_7a
    move-exception p0

    .line 74
    invoke-virtual {p0}, Ljava/io/IOException;->printStackTrace()V

    :cond_7e
    :goto_7e
    return-object v0

    :cond_7f
    if-eqz p0, :cond_95

    .line 72
    :try_start_81
    invoke-virtual {p0}, Ljava/io/InputStream;->close()V
    :try_end_84
    .catch Ljava/io/IOException; {:try_start_81 .. :try_end_84} :catch_91

    goto :goto_95

    :catchall_85
    move-exception v0

    goto :goto_96

    :catch_87
    move-exception v0

    .line 68
    :try_start_88
    invoke-virtual {v0}, Ljava/io/IOException;->printStackTrace()V
    :try_end_8b
    .catchall {:try_start_88 .. :try_end_8b} :catchall_85

    if-eqz p0, :cond_95

    .line 72
    :try_start_8d
    invoke-virtual {p0}, Ljava/io/InputStream;->close()V
    :try_end_90
    .catch Ljava/io/IOException; {:try_start_8d .. :try_end_90} :catch_91

    goto :goto_95

    :catch_91
    move-exception p0

    .line 74
    invoke-virtual {p0}, Ljava/io/IOException;->printStackTrace()V

    :cond_95
    :goto_95
    return-object v1

    :goto_96
    if-eqz p0, :cond_a0

    .line 72
    :try_start_98
    invoke-virtual {p0}, Ljava/io/InputStream;->close()V
    :try_end_9b
    .catch Ljava/io/IOException; {:try_start_98 .. :try_end_9b} :catch_9c

    goto :goto_a0

    :catch_9c
    move-exception p0

    .line 74
    invoke-virtual {p0}, Ljava/io/IOException;->printStackTrace()V

    .line 77
    :cond_a0
    :goto_a0
    throw v0
.end method

.method private static getVP8Dimension(Ljava/io/InputStream;)Landroid/util/Pair;
    .registers 5
    .annotation system Ldalvik/annotation/MethodParameters;
        accessFlags = {
            0x10
        }
        names = {
            "is"
        }
    .end annotation

    .annotation system Ldalvik/annotation/Signature;
        value = {
            "(",
            "Ljava/io/InputStream;",
            ")",
            "Landroid/util/Pair<",
            "Ljava/lang/Integer;",
            "Ljava/lang/Integer;",
            ">;"
        }
    .end annotation

    .annotation system Ldalvik/annotation/Throws;
        value = {
            Ljava/io/IOException;
        }
    .end annotation

    .annotation runtime Ljavax/annotation/Nullable;
    .end annotation

    const-wide/16 v0, 0x7

    .line 92
    invoke-virtual {p0, v0, v1}, Ljava/io/InputStream;->skip(J)J

    .line 94
    invoke-static {p0}, Lcom/facebook/imageutils/WebpUtil;->getShort(Ljava/io/InputStream;)S

    move-result v0

    .line 95
    invoke-static {p0}, Lcom/facebook/imageutils/WebpUtil;->getShort(Ljava/io/InputStream;)S

    move-result v1

    .line 96
    invoke-static {p0}, Lcom/facebook/imageutils/WebpUtil;->getShort(Ljava/io/InputStream;)S

    move-result v2

    const/16 v3, 0x9d

    if-ne v0, v3, :cond_33

    const/4 v0, 0x1

    if-ne v1, v0, :cond_33

    const/16 v0, 0x2a

    if-eq v2, v0, :cond_1d

    goto :goto_33

    .line 102
    :cond_1d
    new-instance v0, Landroid/util/Pair;

    invoke-static {p0}, Lcom/facebook/imageutils/WebpUtil;->get2BytesAsInt(Ljava/io/InputStream;)I

    move-result v1

    invoke-static {v1}, Ljava/lang/Integer;->valueOf(I)Ljava/lang/Integer;

    move-result-object v1

    invoke-static {p0}, Lcom/facebook/imageutils/WebpUtil;->get2BytesAsInt(Ljava/io/InputStream;)I

    move-result p0

    invoke-static {p0}, Ljava/lang/Integer;->valueOf(I)Ljava/lang/Integer;

    move-result-object p0

    invoke-direct {v0, v1, p0}, Landroid/util/Pair;-><init>(Ljava/lang/Object;Ljava/lang/Object;)V

    return-object v0

    :cond_33
    :goto_33
    const/4 p0, 0x0

    return-object p0
.end method

.method private static getVP8LDimension(Ljava/io/InputStream;)Landroid/util/Pair;
    .registers 5
    .annotation system Ldalvik/annotation/MethodParameters;
        accessFlags = {
            0x10
        }
        names = {
            "is"
        }
    .end annotation

    .annotation system Ldalvik/annotation/Signature;
        value = {
            "(",
            "Ljava/io/InputStream;",
            ")",
            "Landroid/util/Pair<",
            "Ljava/lang/Integer;",
            "Ljava/lang/Integer;",
            ">;"
        }
    .end annotation

    .annotation system Ldalvik/annotation/Throws;
        value = {
            Ljava/io/IOException;
        }
    .end annotation

    .annotation runtime Ljavax/annotation/Nullable;
    .end annotation

    .line 115
    invoke-static {p0}, Lcom/facebook/imageutils/WebpUtil;->getInt(Ljava/io/InputStream;)I

    .line 117
    invoke-static {p0}, Lcom/facebook/imageutils/WebpUtil;->getByte(Ljava/io/InputStream;)B

    move-result v0

    const/16 v1, 0x2f

    if-eq v0, v1, :cond_d

    const/4 p0, 0x0

    return-object p0

    .line 121
    :cond_d
    invoke-virtual {p0}, Ljava/io/InputStream;->read()I

    move-result v0

    int-to-byte v0, v0

    and-int/lit16 v0, v0, 0xff

    .line 122
    invoke-virtual {p0}, Ljava/io/InputStream;->read()I

    move-result v1

    int-to-byte v1, v1

    and-int/lit16 v1, v1, 0xff

    .line 123
    invoke-virtual {p0}, Ljava/io/InputStream;->read()I

    move-result v2

    int-to-byte v2, v2

    and-int/lit16 v2, v2, 0xff

    .line 124
    invoke-virtual {p0}, Ljava/io/InputStream;->read()I

    move-result p0

    int-to-byte p0, p0

    and-int/lit16 p0, p0, 0xff

    and-int/lit8 v3, v1, 0x3f

    shl-int/lit8 v3, v3, 0x8

    or-int/2addr v0, v3

    add-int/lit8 v0, v0, 0x1

    and-int/lit8 p0, p0, 0xf

    shl-int/lit8 p0, p0, 0xa

    shl-int/lit8 v2, v2, 0x2

    or-int/2addr p0, v2

    and-int/lit16 v1, v1, 0xc0

    shr-int/lit8 v1, v1, 0x6

    or-int/2addr p0, v1

    add-int/lit8 p0, p0, 0x1

    .line 128
    new-instance v1, Landroid/util/Pair;

    invoke-static {v0}, Ljava/lang/Integer;->valueOf(I)Ljava/lang/Integer;

    move-result-object v0

    invoke-static {p0}, Ljava/lang/Integer;->valueOf(I)Ljava/lang/Integer;

    move-result-object p0

    invoke-direct {v1, v0, p0}, Landroid/util/Pair;-><init>(Ljava/lang/Object;Ljava/lang/Object;)V

    return-object v1
.end method

.method private static getVP8XDimension(Ljava/io/InputStream;)Landroid/util/Pair;
    .registers 3
    .annotation system Ldalvik/annotation/MethodParameters;
        accessFlags = {
            0x10
        }
        names = {
            "is"
        }
    .end annotation

    .annotation system Ldalvik/annotation/Signature;
        value = {
            "(",
            "Ljava/io/InputStream;",
            ")",
            "Landroid/util/Pair<",
            "Ljava/lang/Integer;",
            "Ljava/lang/Integer;",
            ">;"
        }
    .end annotation

    .annotation system Ldalvik/annotation/Throws;
        value = {
            Ljava/io/IOException;
        }
    .end annotation

    const-wide/16 v0, 0x8

    .line 140
    invoke-virtual {p0, v0, v1}, Ljava/io/InputStream;->skip(J)J

    .line 142
    new-instance v0, Landroid/util/Pair;

    invoke-static {p0}, Lcom/facebook/imageutils/WebpUtil;->read3Bytes(Ljava/io/InputStream;)I

    move-result v1

    add-int/lit8 v1, v1, 0x1

    invoke-static {v1}, Ljava/lang/Integer;->valueOf(I)Ljava/lang/Integer;

    move-result-object v1

    invoke-static {p0}, Lcom/facebook/imageutils/WebpUtil;->read3Bytes(Ljava/io/InputStream;)I

    move-result p0

    add-int/lit8 p0, p0, 0x1

    invoke-static {p0}, Ljava/lang/Integer;->valueOf(I)Ljava/lang/Integer;

    move-result-object p0

    invoke-direct {v0, v1, p0}, Landroid/util/Pair;-><init>(Ljava/lang/Object;Ljava/lang/Object;)V

    return-object v0
.end method

.method private static isBitOne(BI)Z
    .registers 2
    .annotation system Ldalvik/annotation/MethodParameters;
        accessFlags = {
            0x0,
            0x0
        }
        names = {
            "input",
            "bitIndex"
        }
    .end annotation

    .line 207
    rem-int/lit8 p1, p1, 0x8

    shr-int/2addr p0, p1

    const/4 p1, 0x1

    and-int/2addr p0, p1

    if-ne p0, p1, :cond_8

    goto :goto_9

    :cond_8
    const/4 p1, 0x0

    :goto_9
    return p1
.end method

.method private static read3Bytes(Ljava/io/InputStream;)I
    .registers 4
    .annotation system Ldalvik/annotation/MethodParameters;
        accessFlags = {
            0x0
        }
        names = {
            "is"
        }
    .end annotation

    .annotation system Ldalvik/annotation/Throws;
        value = {
            Ljava/io/IOException;
        }
    .end annotation

    .line 190
    invoke-static {p0}, Lcom/facebook/imageutils/WebpUtil;->getByte(Ljava/io/InputStream;)B

    move-result v0

    .line 191
    invoke-static {p0}, Lcom/facebook/imageutils/WebpUtil;->getByte(Ljava/io/InputStream;)B

    move-result v1

    .line 192
    invoke-static {p0}, Lcom/facebook/imageutils/WebpUtil;->getByte(Ljava/io/InputStream;)B

    move-result p0

    shl-int/lit8 p0, p0, 0x10

    const/high16 v2, 0xff0000

    and-int/2addr p0, v2

    shl-int/lit8 v1, v1, 0x8

    const v2, 0xff00

    and-int/2addr v1, v2

    or-int/2addr p0, v1

    and-int/lit16 v0, v0, 0xff

    or-int/2addr p0, v0

    return p0
.end method