WebpUtil.smali

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


# 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 34
    invoke-direct {p0}, Ljava/lang/Object;-><init>()V

    return-void
.end method

.method private static compare([BLjava/lang/String;)Z
    .registers 6

    .line 158
    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
    const/4 v0, 0x0

    .line 161
    :goto_a
    array-length v1, p0

    if-ge v0, v1, :cond_19

    .line 162
    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/Throws;
        value = {
            Ljava/io/IOException;
        }
    .end annotation

    .line 189
    invoke-virtual {p0}, Ljava/io/InputStream;->read()I

    move-result v0

    int-to-byte v0, v0

    .line 190
    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/Throws;
        value = {
            Ljava/io/IOException;
        }
    .end annotation

    .line 208
    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

    .line 170
    new-instance v0, Ljava/lang/StringBuilder;

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

    const/4 v1, 0x0

    .line 171
    :goto_6
    array-length v2, p0

    if-ge v1, v2, :cond_12

    .line 172
    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 174
    :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/Throws;
        value = {
            Ljava/io/IOException;
        }
    .end annotation

    .line 178
    invoke-virtual {p0}, Ljava/io/InputStream;->read()I

    move-result v0

    int-to-byte v0, v0

    .line 179
    invoke-virtual {p0}, Ljava/io/InputStream;->read()I

    move-result v1

    int-to-byte v1, v1

    .line 180
    invoke-virtual {p0}, Ljava/io/InputStream;->read()I

    move-result v2

    int-to-byte v2, v2

    .line 181
    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/Throws;
        value = {
            Ljava/io/IOException;
        }
    .end annotation

    .line 204
    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/Signature;
        value = {
            "(",
            "Ljava/io/InputStream;",
            ")",
            "Landroid/util/Pair<",
            "Ljava/lang/Integer;",
            "Ljava/lang/Integer;",
            ">;"
        }
    .end annotation

    const/4 v0, 0x4

    new-array v0, v0, [B

    const/4 v1, 0x0

    .line 50
    :try_start_4
    invoke-virtual {p0, v0}, Ljava/io/InputStream;->read([B)I

    const-string v2, "RIFF"

    .line 52
    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_73
    .catchall {:try_start_4 .. :try_end_d} :catchall_6c

    if-nez v2, :cond_15

    if-eqz p0, :cond_14

    .line 77
    :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_14

    :catch_14
    :cond_14
    return-object v1

    .line 56
    :cond_15
    :try_start_15
    invoke-static {p0}, Lcom/facebook/imageutils/WebpUtil;->getInt(Ljava/io/InputStream;)I

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

    const-string v2, "WEBP"

    .line 59
    invoke-static {v0, v2}, Lcom/facebook/imageutils/WebpUtil;->compare([BLjava/lang/String;)Z

    move-result v2
    :try_end_21
    .catch Ljava/io/IOException; {:try_start_15 .. :try_end_21} :catch_73
    .catchall {:try_start_15 .. :try_end_21} :catchall_6c

    if-nez v2, :cond_29

    if-eqz p0, :cond_28

    .line 77
    :try_start_25
    invoke-virtual {p0}, Ljava/io/InputStream;->close()V
    :try_end_28
    .catch Ljava/io/IOException; {:try_start_25 .. :try_end_28} :catch_28

    :catch_28
    :cond_28
    return-object v1

    .line 63
    :cond_29
    :try_start_29
    invoke-virtual {p0, v0}, Ljava/io/InputStream;->read([B)I

    .line 64
    invoke-static {v0}, Lcom/facebook/imageutils/WebpUtil;->getHeader([B)Ljava/lang/String;

    move-result-object v0

    const-string v2, "VP8 "

    .line 65
    invoke-virtual {v2, v0}, Ljava/lang/String;->equals(Ljava/lang/Object;)Z

    move-result v2

    if-eqz v2, :cond_42

    .line 66
    invoke-static {p0}, Lcom/facebook/imageutils/WebpUtil;->getVP8Dimension(Ljava/io/InputStream;)Landroid/util/Pair;

    move-result-object v0
    :try_end_3c
    .catch Ljava/io/IOException; {:try_start_29 .. :try_end_3c} :catch_73
    .catchall {:try_start_29 .. :try_end_3c} :catchall_6c

    if-eqz p0, :cond_41

    .line 77
    :try_start_3e
    invoke-virtual {p0}, Ljava/io/InputStream;->close()V
    :try_end_41
    .catch Ljava/io/IOException; {:try_start_3e .. :try_end_41} :catch_41

    :catch_41
    :cond_41
    return-object v0

    :cond_42
    :try_start_42
    const-string v2, "VP8L"

    .line 67
    invoke-virtual {v2, v0}, Ljava/lang/String;->equals(Ljava/lang/Object;)Z

    move-result v2

    if-eqz v2, :cond_54

    .line 68
    invoke-static {p0}, Lcom/facebook/imageutils/WebpUtil;->getVP8LDimension(Ljava/io/InputStream;)Landroid/util/Pair;

    move-result-object v0
    :try_end_4e
    .catch Ljava/io/IOException; {:try_start_42 .. :try_end_4e} :catch_73
    .catchall {:try_start_42 .. :try_end_4e} :catchall_6c

    if-eqz p0, :cond_53

    .line 77
    :try_start_50
    invoke-virtual {p0}, Ljava/io/InputStream;->close()V
    :try_end_53
    .catch Ljava/io/IOException; {:try_start_50 .. :try_end_53} :catch_53

    :catch_53
    :cond_53
    return-object v0

    :cond_54
    :try_start_54
    const-string v2, "VP8X"

    .line 69
    invoke-virtual {v2, v0}, Ljava/lang/String;->equals(Ljava/lang/Object;)Z

    move-result v0

    if-eqz v0, :cond_66

    .line 70
    invoke-static {p0}, Lcom/facebook/imageutils/WebpUtil;->getVP8XDimension(Ljava/io/InputStream;)Landroid/util/Pair;

    move-result-object v0
    :try_end_60
    .catch Ljava/io/IOException; {:try_start_54 .. :try_end_60} :catch_73
    .catchall {:try_start_54 .. :try_end_60} :catchall_6c

    if-eqz p0, :cond_65

    .line 77
    :try_start_62
    invoke-virtual {p0}, Ljava/io/InputStream;->close()V
    :try_end_65
    .catch Ljava/io/IOException; {:try_start_62 .. :try_end_65} :catch_65

    :catch_65
    :cond_65
    return-object v0

    :cond_66
    if-eqz p0, :cond_77

    :goto_68
    :try_start_68
    invoke-virtual {p0}, Ljava/io/InputStream;->close()V
    :try_end_6b
    .catch Ljava/io/IOException; {:try_start_68 .. :try_end_6b} :catch_77

    goto :goto_77

    :catchall_6c
    move-exception v0

    if-eqz p0, :cond_72

    :try_start_6f
    invoke-virtual {p0}, Ljava/io/InputStream;->close()V
    :try_end_72
    .catch Ljava/io/IOException; {:try_start_6f .. :try_end_72} :catch_72

    .line 80
    :catch_72
    :cond_72
    throw v0

    :catch_73
    nop

    if-eqz p0, :cond_77

    goto :goto_68

    :catch_77
    :cond_77
    :goto_77
    return-object v1
.end method

.method private static getVP8Dimension(Ljava/io/InputStream;)Landroid/util/Pair;
    .registers 5
    .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, 0x7

    .line 97
    invoke-virtual {p0, v0, v1}, Ljava/io/InputStream;->skip(J)J

    .line 99
    invoke-static {p0}, Lcom/facebook/imageutils/WebpUtil;->getShort(Ljava/io/InputStream;)S

    move-result v0

    .line 100
    invoke-static {p0}, Lcom/facebook/imageutils/WebpUtil;->getShort(Ljava/io/InputStream;)S

    move-result v1

    .line 101
    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 107
    :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/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

    .line 120
    invoke-static {p0}, Lcom/facebook/imageutils/WebpUtil;->getInt(Ljava/io/InputStream;)I

    .line 122
    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 126
    :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 127
    invoke-virtual {p0}, Ljava/io/InputStream;->read()I

    move-result v1

    int-to-byte v1, v1

    and-int/lit16 v1, v1, 0xff

    .line 128
    invoke-virtual {p0}, Ljava/io/InputStream;->read()I

    move-result v2

    int-to-byte v2, v2

    and-int/lit16 v2, v2, 0xff

    .line 129
    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 133
    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/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 145
    invoke-virtual {p0, v0, v1}, Ljava/io/InputStream;->skip(J)J

    .line 147
    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

    .line 212
    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

    return p1

    :cond_8
    const/4 p0, 0x0

    return p0
.end method

.method private static read3Bytes(Ljava/io/InputStream;)I
    .registers 4
    .annotation system Ldalvik/annotation/Throws;
        value = {
            Ljava/io/IOException;
        }
    .end annotation

    .line 195
    invoke-static {p0}, Lcom/facebook/imageutils/WebpUtil;->getByte(Ljava/io/InputStream;)B

    move-result v0

    .line 196
    invoke-static {p0}, Lcom/facebook/imageutils/WebpUtil;->getByte(Ljava/io/InputStream;)B

    move-result v1

    .line 197
    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