Sniffer.smali

.class final Lcom/google/android/exoplayer2/extractor/mkv/Sniffer;
.super Ljava/lang/Object;
.source "Sniffer.java"


# static fields
.field private static final ID_EBML:I

.field private static final SEARCH_LENGTH:I


# instance fields
.field private peekLength:I

.field private final scratch:Lcom/google/android/exoplayer2/util/ParsableByteArray;


# direct methods
.method static constructor <clinit>()V
    .registers 1

    const v0, 0x1a45cacc

    invoke-static {v0}, Lnp/NPFog;->d(I)I

    move-result v0

    sput v0, Lcom/google/android/exoplayer2/extractor/mkv/Sniffer;->ID_EBML:I

    const v0, 0x116f

    invoke-static {v0}, Lnp/NPFog;->d(I)I

    move-result v0

    sput v0, Lcom/google/android/exoplayer2/extractor/mkv/Sniffer;->SEARCH_LENGTH:I

    return-void
.end method

.method public constructor <init>()V
    .registers 3

    .line 38
    invoke-direct {p0}, Ljava/lang/Object;-><init>()V

    .line 39
    new-instance v0, Lcom/google/android/exoplayer2/util/ParsableByteArray;

    const/16 v1, 0x8

    invoke-direct {v0, v1}, Lcom/google/android/exoplayer2/util/ParsableByteArray;-><init>(I)V

    iput-object v0, p0, Lcom/google/android/exoplayer2/extractor/mkv/Sniffer;->scratch:Lcom/google/android/exoplayer2/util/ParsableByteArray;

    .line 40
    return-void
.end method

.method private readUint(Lcom/google/android/exoplayer2/extractor/ExtractorInput;)J
    .registers 8
    .param p1, "input"    # Lcom/google/android/exoplayer2/extractor/ExtractorInput;
    .annotation system Ldalvik/annotation/Throws;
        value = {
            Ljava/io/IOException;,
            Ljava/lang/InterruptedException;
        }
    .end annotation

    .line 93
    iget-object v0, p0, Lcom/google/android/exoplayer2/extractor/mkv/Sniffer;->scratch:Lcom/google/android/exoplayer2/util/ParsableByteArray;

    iget-object v0, v0, Lcom/google/android/exoplayer2/util/ParsableByteArray;->data:[B

    const/4 v1, 0x0

    const/4 v2, 0x1

    invoke-interface {p1, v0, v1, v2}, Lcom/google/android/exoplayer2/extractor/ExtractorInput;->peekFully([BII)V

    .line 94
    iget-object v0, p0, Lcom/google/android/exoplayer2/extractor/mkv/Sniffer;->scratch:Lcom/google/android/exoplayer2/util/ParsableByteArray;

    iget-object v0, v0, Lcom/google/android/exoplayer2/util/ParsableByteArray;->data:[B

    aget-byte v0, v0, v1

    and-int/lit16 v0, v0, 0xff

    .line 95
    .local v0, "value":I
    if-nez v0, :cond_16

    .line 96
    const-wide/high16 v1, -0x8000000000000000L

    return-wide v1

    .line 98
    :cond_16
    const/16 v1, 0x80

    .line 99
    .local v1, "mask":I
    const/4 v3, 0x0

    .line 100
    .local v3, "length":I
    :goto_19
    and-int v4, v0, v1

    if-nez v4, :cond_22

    .line 101
    shr-int/lit8 v1, v1, 0x1

    .line 102
    add-int/lit8 v3, v3, 0x1

    goto :goto_19

    .line 104
    :cond_22
    xor-int/lit8 v4, v1, -0x1

    and-int/2addr v0, v4

    .line 105
    iget-object v4, p0, Lcom/google/android/exoplayer2/extractor/mkv/Sniffer;->scratch:Lcom/google/android/exoplayer2/util/ParsableByteArray;

    iget-object v4, v4, Lcom/google/android/exoplayer2/util/ParsableByteArray;->data:[B

    invoke-interface {p1, v4, v2, v3}, Lcom/google/android/exoplayer2/extractor/ExtractorInput;->peekFully([BII)V

    .line 106
    const/4 v2, 0x0

    .local v2, "i":I
    :goto_2d
    if-ge v2, v3, :cond_3f

    .line 107
    shl-int/lit8 v0, v0, 0x8

    .line 108
    iget-object v4, p0, Lcom/google/android/exoplayer2/extractor/mkv/Sniffer;->scratch:Lcom/google/android/exoplayer2/util/ParsableByteArray;

    iget-object v4, v4, Lcom/google/android/exoplayer2/util/ParsableByteArray;->data:[B

    add-int/lit8 v5, v2, 0x1

    aget-byte v4, v4, v5

    and-int/lit16 v4, v4, 0xff

    add-int/2addr v0, v4

    .line 106
    add-int/lit8 v2, v2, 0x1

    goto :goto_2d

    .line 110
    .end local v2    # "i":I
    :cond_3f
    iget v2, p0, Lcom/google/android/exoplayer2/extractor/mkv/Sniffer;->peekLength:I

    add-int/lit8 v4, v3, 0x1

    add-int/2addr v2, v4

    iput v2, p0, Lcom/google/android/exoplayer2/extractor/mkv/Sniffer;->peekLength:I

    .line 111
    int-to-long v4, v0

    return-wide v4
.end method


# virtual methods
.method public sniff(Lcom/google/android/exoplayer2/extractor/ExtractorInput;)Z
    .registers 26
    .param p1, "input"    # Lcom/google/android/exoplayer2/extractor/ExtractorInput;
    .annotation system Ldalvik/annotation/Throws;
        value = {
            Ljava/io/IOException;,
            Ljava/lang/InterruptedException;
        }
    .end annotation

    .line 46
    move-object/from16 v0, p0

    move-object/from16 v1, p1

    invoke-interface/range {p1 .. p1}, Lcom/google/android/exoplayer2/extractor/ExtractorInput;->getLength()J

    move-result-wide v2

    .line 47
    .local v2, "inputLength":J
    const-wide/16 v4, 0x400

    const-wide/16 v6, -0x1

    cmp-long v8, v2, v6

    if-eqz v8, :cond_16

    cmp-long v8, v2, v4

    if-lez v8, :cond_15

    goto :goto_16

    :cond_15
    move-wide v4, v2

    :cond_16
    :goto_16
    long-to-int v5, v4

    .line 50
    .local v5, "bytesToSearch":I
    iget-object v4, v0, Lcom/google/android/exoplayer2/extractor/mkv/Sniffer;->scratch:Lcom/google/android/exoplayer2/util/ParsableByteArray;

    iget-object v4, v4, Lcom/google/android/exoplayer2/util/ParsableByteArray;->data:[B

    const/4 v8, 0x4

    const/4 v9, 0x0

    invoke-interface {v1, v4, v9, v8}, Lcom/google/android/exoplayer2/extractor/ExtractorInput;->peekFully([BII)V

    .line 51
    iget-object v4, v0, Lcom/google/android/exoplayer2/extractor/mkv/Sniffer;->scratch:Lcom/google/android/exoplayer2/util/ParsableByteArray;

    invoke-virtual {v4}, Lcom/google/android/exoplayer2/util/ParsableByteArray;->readUnsignedInt()J

    move-result-wide v10

    .line 52
    .local v10, "tag":J
    iput v8, v0, Lcom/google/android/exoplayer2/extractor/mkv/Sniffer;->peekLength:I

    .line 53
    :goto_28
    const-wide/32 v12, 0x1a45dfa3

    const/4 v4, 0x1

    cmp-long v8, v10, v12

    if-eqz v8, :cond_52

    .line 54
    iget v8, v0, Lcom/google/android/exoplayer2/extractor/mkv/Sniffer;->peekLength:I

    add-int/2addr v8, v4

    iput v8, v0, Lcom/google/android/exoplayer2/extractor/mkv/Sniffer;->peekLength:I

    if-ne v8, v5, :cond_38

    .line 55
    return v9

    .line 57
    :cond_38
    iget-object v8, v0, Lcom/google/android/exoplayer2/extractor/mkv/Sniffer;->scratch:Lcom/google/android/exoplayer2/util/ParsableByteArray;

    iget-object v8, v8, Lcom/google/android/exoplayer2/util/ParsableByteArray;->data:[B

    invoke-interface {v1, v8, v9, v4}, Lcom/google/android/exoplayer2/extractor/ExtractorInput;->peekFully([BII)V

    .line 58
    const/16 v4, 0x8

    shl-long v12, v10, v4

    const-wide/16 v14, -0x100

    and-long v10, v12, v14

    .line 59
    iget-object v4, v0, Lcom/google/android/exoplayer2/extractor/mkv/Sniffer;->scratch:Lcom/google/android/exoplayer2/util/ParsableByteArray;

    iget-object v4, v4, Lcom/google/android/exoplayer2/util/ParsableByteArray;->data:[B

    aget-byte v4, v4, v9

    and-int/lit16 v4, v4, 0xff

    int-to-long v12, v4

    or-long/2addr v10, v12

    goto :goto_28

    .line 63
    :cond_52
    invoke-direct/range {p0 .. p1}, Lcom/google/android/exoplayer2/extractor/mkv/Sniffer;->readUint(Lcom/google/android/exoplayer2/extractor/ExtractorInput;)J

    move-result-wide v12

    .line 64
    .local v12, "headerSize":J
    iget v8, v0, Lcom/google/android/exoplayer2/extractor/mkv/Sniffer;->peekLength:I

    int-to-long v14, v8

    .line 65
    .local v14, "headerStart":J
    const-wide/high16 v16, -0x8000000000000000L

    cmp-long v8, v12, v16

    if-eqz v8, :cond_b1

    cmp-long v8, v2, v6

    if-eqz v8, :cond_6b

    add-long v6, v14, v12

    cmp-long v8, v6, v2

    if-ltz v8, :cond_6b

    move v8, v5

    goto :goto_b2

    .line 71
    :cond_6b
    :goto_6b
    iget v6, v0, Lcom/google/android/exoplayer2/extractor/mkv/Sniffer;->peekLength:I

    int-to-long v7, v6

    add-long v18, v14, v12

    cmp-long v20, v7, v18

    if-gez v20, :cond_a5

    .line 72
    invoke-direct/range {p0 .. p1}, Lcom/google/android/exoplayer2/extractor/mkv/Sniffer;->readUint(Lcom/google/android/exoplayer2/extractor/ExtractorInput;)J

    move-result-wide v6

    .line 73
    .local v6, "id":J
    cmp-long v8, v6, v16

    if-nez v8, :cond_7d

    .line 74
    return v9

    .line 76
    :cond_7d
    move v8, v5

    .end local v5    # "bytesToSearch":I
    .local v8, "bytesToSearch":I
    invoke-direct/range {p0 .. p1}, Lcom/google/android/exoplayer2/extractor/mkv/Sniffer;->readUint(Lcom/google/android/exoplayer2/extractor/ExtractorInput;)J

    move-result-wide v4

    .line 77
    .local v4, "size":J
    const-wide/16 v19, 0x0

    cmp-long v21, v4, v19

    if-ltz v21, :cond_a3

    const-wide/32 v21, 0x7fffffff

    cmp-long v23, v4, v21

    if-lez v23, :cond_90

    goto :goto_a3

    .line 80
    :cond_90
    cmp-long v21, v4, v19

    if-eqz v21, :cond_9d

    .line 81
    long-to-int v9, v4

    .line 82
    .local v9, "sizeInt":I
    invoke-interface {v1, v9}, Lcom/google/android/exoplayer2/extractor/ExtractorInput;->advancePeekPosition(I)V

    .line 83
    iget v1, v0, Lcom/google/android/exoplayer2/extractor/mkv/Sniffer;->peekLength:I

    add-int/2addr v1, v9

    iput v1, v0, Lcom/google/android/exoplayer2/extractor/mkv/Sniffer;->peekLength:I

    .line 85
    .end local v4    # "size":J
    .end local v6    # "id":J
    .end local v9    # "sizeInt":I
    :cond_9d
    move-object/from16 v1, p1

    move v5, v8

    const/4 v4, 0x1

    const/4 v9, 0x0

    goto :goto_6b

    .line 78
    .restart local v4    # "size":J
    .restart local v6    # "id":J
    :cond_a3
    :goto_a3
    const/4 v1, 0x0

    return v1

    .line 86
    .end local v4    # "size":J
    .end local v6    # "id":J
    .end local v8    # "bytesToSearch":I
    .restart local v5    # "bytesToSearch":I
    :cond_a5
    move v8, v5

    .end local v5    # "bytesToSearch":I
    .restart local v8    # "bytesToSearch":I
    int-to-long v4, v6

    add-long v6, v14, v12

    cmp-long v1, v4, v6

    if-nez v1, :cond_af

    const/4 v9, 0x1

    goto :goto_b0

    :cond_af
    const/4 v9, 0x0

    :goto_b0
    return v9

    .line 65
    .end local v8    # "bytesToSearch":I
    .restart local v5    # "bytesToSearch":I
    :cond_b1
    move v8, v5

    .line 67
    .end local v5    # "bytesToSearch":I
    .restart local v8    # "bytesToSearch":I
    :goto_b2
    const/4 v1, 0x0

    return v1
.end method