DTSTrackImpl$LookAhead.smali

.class Lcom/googlecode/mp4parser/authoring/tracks/DTSTrackImpl$LookAhead;
.super Ljava/lang/Object;
.source "DTSTrackImpl.java"


# annotations
.annotation system Ldalvik/annotation/EnclosingClass;
    value = Lcom/googlecode/mp4parser/authoring/tracks/DTSTrackImpl;
.end annotation

.annotation system Ldalvik/annotation/InnerClass;
    accessFlags = 0x0
    name = "LookAhead"
.end annotation


# instance fields
.field buffer:Ljava/nio/ByteBuffer;

.field bufferStartPos:J

.field private final corePresent:I

.field dataEnd:J

.field dataSource:Lcom/googlecode/mp4parser/DataSource;

.field inBufferPos:I

.field start:J

.field final synthetic this$0:Lcom/googlecode/mp4parser/authoring/tracks/DTSTrackImpl;


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

    return-void
.end method

.method constructor <init>(Lcom/googlecode/mp4parser/authoring/tracks/DTSTrackImpl;Lcom/googlecode/mp4parser/DataSource;JJI)V
    .registers 10
    .param p2, "dataSource"    # Lcom/googlecode/mp4parser/DataSource;
    .param p3, "bufferStartPos"    # J
    .param p5, "dataSize"    # J
    .param p7, "corePresent"    # I
    .annotation system Ldalvik/annotation/Throws;
        value = {
            Ljava/io/IOException;
        }
    .end annotation

    .line 854
    iput-object p1, p0, Lcom/googlecode/mp4parser/authoring/tracks/DTSTrackImpl$LookAhead;->this$0:Lcom/googlecode/mp4parser/authoring/tracks/DTSTrackImpl;

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

    .line 847
    const/4 p1, 0x0

    iput p1, p0, Lcom/googlecode/mp4parser/authoring/tracks/DTSTrackImpl$LookAhead;->inBufferPos:I

    .line 855
    iput-object p2, p0, Lcom/googlecode/mp4parser/authoring/tracks/DTSTrackImpl$LookAhead;->dataSource:Lcom/googlecode/mp4parser/DataSource;

    .line 856
    iput-wide p3, p0, Lcom/googlecode/mp4parser/authoring/tracks/DTSTrackImpl$LookAhead;->bufferStartPos:J

    .line 857
    add-long v0, p5, p3

    iput-wide v0, p0, Lcom/googlecode/mp4parser/authoring/tracks/DTSTrackImpl$LookAhead;->dataEnd:J

    .line 858
    iput p7, p0, Lcom/googlecode/mp4parser/authoring/tracks/DTSTrackImpl$LookAhead;->corePresent:I

    .line 859
    invoke-direct {p0}, Lcom/googlecode/mp4parser/authoring/tracks/DTSTrackImpl$LookAhead;->fillBuffer()V

    .line 860
    return-void
.end method

.method private discardByte()V
    .registers 2

    .line 937
    iget v0, p0, Lcom/googlecode/mp4parser/authoring/tracks/DTSTrackImpl$LookAhead;->inBufferPos:I

    add-int/lit8 v0, v0, 0x1

    iput v0, p0, Lcom/googlecode/mp4parser/authoring/tracks/DTSTrackImpl$LookAhead;->inBufferPos:I

    .line 938
    return-void
.end method

.method private discardNext4AndMarkStart()V
    .registers 6

    .line 945
    iget-wide v0, p0, Lcom/googlecode/mp4parser/authoring/tracks/DTSTrackImpl$LookAhead;->bufferStartPos:J

    iget v2, p0, Lcom/googlecode/mp4parser/authoring/tracks/DTSTrackImpl$LookAhead;->inBufferPos:I

    int-to-long v3, v2

    add-long/2addr v0, v3

    iput-wide v0, p0, Lcom/googlecode/mp4parser/authoring/tracks/DTSTrackImpl$LookAhead;->start:J

    .line 946
    add-int/lit8 v2, v2, 0x4

    iput v2, p0, Lcom/googlecode/mp4parser/authoring/tracks/DTSTrackImpl$LookAhead;->inBufferPos:I

    .line 947
    return-void
.end method

.method private discardQWord()V
    .registers 2

    .line 940
    iget v0, p0, Lcom/googlecode/mp4parser/authoring/tracks/DTSTrackImpl$LookAhead;->inBufferPos:I

    add-int/lit8 v0, v0, 0x4

    iput v0, p0, Lcom/googlecode/mp4parser/authoring/tracks/DTSTrackImpl$LookAhead;->inBufferPos:I

    .line 941
    return-void
.end method

.method private fillBuffer()V
    .registers 8
    .annotation system Ldalvik/annotation/Throws;
        value = {
            Ljava/io/IOException;
        }
    .end annotation

    .line 882
    sget-object v0, Ljava/lang/System;->err:Ljava/io/PrintStream;

    const-string v1, "Fill Buffer"

    invoke-virtual {v0, v1}, Ljava/io/PrintStream;->println(Ljava/lang/String;)V

    .line 883
    iget-object v0, p0, Lcom/googlecode/mp4parser/authoring/tracks/DTSTrackImpl$LookAhead;->dataSource:Lcom/googlecode/mp4parser/DataSource;

    iget-wide v1, p0, Lcom/googlecode/mp4parser/authoring/tracks/DTSTrackImpl$LookAhead;->bufferStartPos:J

    iget-wide v3, p0, Lcom/googlecode/mp4parser/authoring/tracks/DTSTrackImpl$LookAhead;->dataEnd:J

    sub-long/2addr v3, v1

    const-wide/32 v5, 0x4000000

    invoke-static {v3, v4, v5, v6}, Ljava/lang/Math;->min(JJ)J

    move-result-wide v3

    invoke-interface {v0, v1, v2, v3, v4}, Lcom/googlecode/mp4parser/DataSource;->map(JJ)Ljava/nio/ByteBuffer;

    move-result-object v0

    iput-object v0, p0, Lcom/googlecode/mp4parser/authoring/tracks/DTSTrackImpl$LookAhead;->buffer:Ljava/nio/ByteBuffer;

    .line 884
    return-void
.end method

.method private getSample()Ljava/nio/ByteBuffer;
    .registers 8

    .line 950
    iget-wide v0, p0, Lcom/googlecode/mp4parser/authoring/tracks/DTSTrackImpl$LookAhead;->start:J

    iget-wide v2, p0, Lcom/googlecode/mp4parser/authoring/tracks/DTSTrackImpl$LookAhead;->bufferStartPos:J

    cmp-long v4, v0, v2

    if-ltz v4, :cond_26

    .line 951
    iget-object v4, p0, Lcom/googlecode/mp4parser/authoring/tracks/DTSTrackImpl$LookAhead;->buffer:Ljava/nio/ByteBuffer;

    sub-long/2addr v0, v2

    long-to-int v1, v0

    invoke-virtual {v4, v1}, Ljava/nio/ByteBuffer;->position(I)Ljava/nio/Buffer;

    .line 952
    iget-object v0, p0, Lcom/googlecode/mp4parser/authoring/tracks/DTSTrackImpl$LookAhead;->buffer:Ljava/nio/ByteBuffer;

    invoke-virtual {v0}, Ljava/nio/ByteBuffer;->slice()Ljava/nio/ByteBuffer;

    move-result-object v0

    .line 953
    .local v0, "sample":Ljava/nio/Buffer;
    iget v1, p0, Lcom/googlecode/mp4parser/authoring/tracks/DTSTrackImpl$LookAhead;->inBufferPos:I

    int-to-long v1, v1

    iget-wide v3, p0, Lcom/googlecode/mp4parser/authoring/tracks/DTSTrackImpl$LookAhead;->start:J

    iget-wide v5, p0, Lcom/googlecode/mp4parser/authoring/tracks/DTSTrackImpl$LookAhead;->bufferStartPos:J

    sub-long/2addr v3, v5

    sub-long/2addr v1, v3

    long-to-int v2, v1

    invoke-virtual {v0, v2}, Ljava/nio/Buffer;->limit(I)Ljava/nio/Buffer;

    .line 954
    move-object v1, v0

    check-cast v1, Ljava/nio/ByteBuffer;

    return-object v1

    .line 956
    .end local v0    # "sample":Ljava/nio/Buffer;
    :cond_26
    new-instance v0, Ljava/lang/RuntimeException;

    const-string v1, "damn! NAL exceeds buffer"

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

    throw v0
.end method

.method private nextFourEquals(BBBB)Z
    .registers 11
    .param p1, "a"    # B
    .param p2, "b"    # B
    .param p3, "c"    # B
    .param p4, "d"    # B
    .annotation system Ldalvik/annotation/Throws;
        value = {
            Ljava/io/IOException;
        }
    .end annotation

    .line 895
    iget-object v0, p0, Lcom/googlecode/mp4parser/authoring/tracks/DTSTrackImpl$LookAhead;->buffer:Ljava/nio/ByteBuffer;

    invoke-virtual {v0}, Ljava/nio/ByteBuffer;->limit()I

    move-result v0

    iget v1, p0, Lcom/googlecode/mp4parser/authoring/tracks/DTSTrackImpl$LookAhead;->inBufferPos:I

    sub-int/2addr v0, v1

    const/4 v2, 0x0

    const/4 v3, 0x4

    if-lt v0, v3, :cond_3b

    .line 896
    iget-object v0, p0, Lcom/googlecode/mp4parser/authoring/tracks/DTSTrackImpl$LookAhead;->buffer:Ljava/nio/ByteBuffer;

    invoke-virtual {v0, v1}, Ljava/nio/ByteBuffer;->get(I)B

    move-result v0

    if-ne v0, p1, :cond_3a

    .line 897
    iget-object v0, p0, Lcom/googlecode/mp4parser/authoring/tracks/DTSTrackImpl$LookAhead;->buffer:Ljava/nio/ByteBuffer;

    iget v1, p0, Lcom/googlecode/mp4parser/authoring/tracks/DTSTrackImpl$LookAhead;->inBufferPos:I

    const/4 v3, 0x1

    add-int/2addr v1, v3

    invoke-virtual {v0, v1}, Ljava/nio/ByteBuffer;->get(I)B

    move-result v0

    if-ne v0, p2, :cond_3a

    .line 898
    iget-object v0, p0, Lcom/googlecode/mp4parser/authoring/tracks/DTSTrackImpl$LookAhead;->buffer:Ljava/nio/ByteBuffer;

    iget v1, p0, Lcom/googlecode/mp4parser/authoring/tracks/DTSTrackImpl$LookAhead;->inBufferPos:I

    add-int/lit8 v1, v1, 0x2

    invoke-virtual {v0, v1}, Ljava/nio/ByteBuffer;->get(I)B

    move-result v0

    if-ne v0, p3, :cond_3a

    .line 899
    iget-object v0, p0, Lcom/googlecode/mp4parser/authoring/tracks/DTSTrackImpl$LookAhead;->buffer:Ljava/nio/ByteBuffer;

    iget v1, p0, Lcom/googlecode/mp4parser/authoring/tracks/DTSTrackImpl$LookAhead;->inBufferPos:I

    add-int/lit8 v1, v1, 0x3

    invoke-virtual {v0, v1}, Ljava/nio/ByteBuffer;->get(I)B

    move-result v0

    if-ne v0, p4, :cond_3a

    .line 896
    return v3

    :cond_3a
    return v2

    .line 901
    :cond_3b
    iget-wide v3, p0, Lcom/googlecode/mp4parser/authoring/tracks/DTSTrackImpl$LookAhead;->bufferStartPos:J

    int-to-long v0, v1

    add-long/2addr v3, v0

    const-wide/16 v0, 0x4

    add-long/2addr v3, v0

    iget-object v0, p0, Lcom/googlecode/mp4parser/authoring/tracks/DTSTrackImpl$LookAhead;->dataSource:Lcom/googlecode/mp4parser/DataSource;

    invoke-interface {v0}, Lcom/googlecode/mp4parser/DataSource;->size()J

    move-result-wide v0

    cmp-long v5, v3, v0

    if-gez v5, :cond_4d

    .line 904
    return v2

    .line 902
    :cond_4d
    new-instance v0, Ljava/io/EOFException;

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

    throw v0
.end method

.method private nextFourEquals0x64582025()Z
    .registers 5
    .annotation system Ldalvik/annotation/Throws;
        value = {
            Ljava/io/IOException;
        }
    .end annotation

    .line 887
    const/16 v0, 0x64

    const/16 v1, 0x58

    const/16 v2, 0x20

    const/16 v3, 0x25

    invoke-direct {p0, v0, v1, v2, v3}, Lcom/googlecode/mp4parser/authoring/tracks/DTSTrackImpl$LookAhead;->nextFourEquals(BBBB)Z

    move-result v0

    return v0
.end method

.method private nextFourEquals0x64582025orEof()Z
    .registers 5
    .annotation system Ldalvik/annotation/Throws;
        value = {
            Ljava/io/IOException;
        }
    .end annotation

    .line 907
    const/16 v0, 0x64

    const/16 v1, 0x58

    const/16 v2, 0x20

    const/16 v3, 0x25

    invoke-direct {p0, v0, v1, v2, v3}, Lcom/googlecode/mp4parser/authoring/tracks/DTSTrackImpl$LookAhead;->nextFourEqualsOrEof(BBBB)Z

    move-result v0

    return v0
.end method

.method private nextFourEquals0x7FFE8001()Z
    .registers 5
    .annotation system Ldalvik/annotation/Throws;
        value = {
            Ljava/io/IOException;
        }
    .end annotation

    .line 891
    const/16 v0, 0x7f

    const/4 v1, -0x2

    const/16 v2, -0x80

    const/4 v3, 0x1

    invoke-direct {p0, v0, v1, v2, v3}, Lcom/googlecode/mp4parser/authoring/tracks/DTSTrackImpl$LookAhead;->nextFourEquals(BBBB)Z

    move-result v0

    return v0
.end method

.method private nextFourEquals0x7FFE8001orEof()Z
    .registers 5
    .annotation system Ldalvik/annotation/Throws;
        value = {
            Ljava/io/IOException;
        }
    .end annotation

    .line 912
    const/16 v0, 0x7f

    const/4 v1, -0x2

    const/16 v2, -0x80

    const/4 v3, 0x1

    invoke-direct {p0, v0, v1, v2, v3}, Lcom/googlecode/mp4parser/authoring/tracks/DTSTrackImpl$LookAhead;->nextFourEqualsOrEof(BBBB)Z

    move-result v0

    return v0
.end method

.method private nextFourEqualsOrEof(BBBB)Z
    .registers 15
    .param p1, "a"    # B
    .param p2, "b"    # B
    .param p3, "c"    # B
    .param p4, "d"    # B
    .annotation system Ldalvik/annotation/Throws;
        value = {
            Ljava/io/IOException;
        }
    .end annotation

    .line 915
    iget-object v0, p0, Lcom/googlecode/mp4parser/authoring/tracks/DTSTrackImpl$LookAhead;->buffer:Ljava/nio/ByteBuffer;

    invoke-virtual {v0}, Ljava/nio/ByteBuffer;->limit()I

    move-result v0

    iget v1, p0, Lcom/googlecode/mp4parser/authoring/tracks/DTSTrackImpl$LookAhead;->inBufferPos:I

    sub-int/2addr v0, v1

    const/4 v2, 0x1

    const/4 v3, 0x0

    const/4 v4, 0x4

    if-lt v0, v4, :cond_66

    .line 916
    iget-wide v4, p0, Lcom/googlecode/mp4parser/authoring/tracks/DTSTrackImpl$LookAhead;->bufferStartPos:J

    int-to-long v0, v1

    add-long/2addr v4, v0

    const-wide/32 v0, 0x100000

    rem-long/2addr v4, v0

    const-wide/16 v0, 0x0

    cmp-long v6, v4, v0

    if-nez v6, :cond_37

    .line 917
    sget-object v0, Ljava/lang/System;->err:Ljava/io/PrintStream;

    new-instance v1, Ljava/lang/StringBuilder;

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

    iget-wide v4, p0, Lcom/googlecode/mp4parser/authoring/tracks/DTSTrackImpl$LookAhead;->bufferStartPos:J

    iget v6, p0, Lcom/googlecode/mp4parser/authoring/tracks/DTSTrackImpl$LookAhead;->inBufferPos:I

    int-to-long v6, v6

    add-long/2addr v4, v6

    const-wide/16 v6, 0x400

    div-long/2addr v4, v6

    div-long/2addr v4, v6

    invoke-virtual {v1, v4, v5}, Ljava/lang/StringBuilder;->append(J)Ljava/lang/StringBuilder;

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

    move-result-object v1

    invoke-virtual {v0, v1}, Ljava/io/PrintStream;->println(Ljava/lang/String;)V

    .line 919
    :cond_37
    iget-object v0, p0, Lcom/googlecode/mp4parser/authoring/tracks/DTSTrackImpl$LookAhead;->buffer:Ljava/nio/ByteBuffer;

    iget v1, p0, Lcom/googlecode/mp4parser/authoring/tracks/DTSTrackImpl$LookAhead;->inBufferPos:I

    invoke-virtual {v0, v1}, Ljava/nio/ByteBuffer;->get(I)B

    move-result v0

    if-ne v0, p1, :cond_65

    .line 920
    iget-object v0, p0, Lcom/googlecode/mp4parser/authoring/tracks/DTSTrackImpl$LookAhead;->buffer:Ljava/nio/ByteBuffer;

    iget v1, p0, Lcom/googlecode/mp4parser/authoring/tracks/DTSTrackImpl$LookAhead;->inBufferPos:I

    add-int/2addr v1, v2

    invoke-virtual {v0, v1}, Ljava/nio/ByteBuffer;->get(I)B

    move-result v0

    if-ne v0, p2, :cond_65

    .line 921
    iget-object v0, p0, Lcom/googlecode/mp4parser/authoring/tracks/DTSTrackImpl$LookAhead;->buffer:Ljava/nio/ByteBuffer;

    iget v1, p0, Lcom/googlecode/mp4parser/authoring/tracks/DTSTrackImpl$LookAhead;->inBufferPos:I

    add-int/lit8 v1, v1, 0x2

    invoke-virtual {v0, v1}, Ljava/nio/ByteBuffer;->get(I)B

    move-result v0

    if-ne v0, p3, :cond_65

    .line 922
    iget-object v0, p0, Lcom/googlecode/mp4parser/authoring/tracks/DTSTrackImpl$LookAhead;->buffer:Ljava/nio/ByteBuffer;

    iget v1, p0, Lcom/googlecode/mp4parser/authoring/tracks/DTSTrackImpl$LookAhead;->inBufferPos:I

    add-int/lit8 v1, v1, 0x3

    invoke-virtual {v0, v1}, Ljava/nio/ByteBuffer;->get(I)B

    move-result v0

    if-ne v0, p4, :cond_65

    .line 919
    return v2

    :cond_65
    return v3

    .line 924
    :cond_66
    iget-wide v4, p0, Lcom/googlecode/mp4parser/authoring/tracks/DTSTrackImpl$LookAhead;->bufferStartPos:J

    int-to-long v6, v1

    add-long/2addr v6, v4

    const-wide/16 v8, 0x4

    add-long/2addr v6, v8

    iget-wide v8, p0, Lcom/googlecode/mp4parser/authoring/tracks/DTSTrackImpl$LookAhead;->dataEnd:J

    cmp-long v0, v6, v8

    if-lez v0, :cond_7b

    .line 925
    int-to-long v0, v1

    add-long/2addr v4, v0

    cmp-long v0, v4, v8

    if-nez v0, :cond_7a

    return v2

    :cond_7a
    return v3

    .line 927
    :cond_7b
    iget-wide v0, p0, Lcom/googlecode/mp4parser/authoring/tracks/DTSTrackImpl$LookAhead;->start:J

    iput-wide v0, p0, Lcom/googlecode/mp4parser/authoring/tracks/DTSTrackImpl$LookAhead;->bufferStartPos:J

    .line 928
    iput v3, p0, Lcom/googlecode/mp4parser/authoring/tracks/DTSTrackImpl$LookAhead;->inBufferPos:I

    .line 929
    invoke-direct {p0}, Lcom/googlecode/mp4parser/authoring/tracks/DTSTrackImpl$LookAhead;->fillBuffer()V

    .line 930
    invoke-direct {p0}, Lcom/googlecode/mp4parser/authoring/tracks/DTSTrackImpl$LookAhead;->nextFourEquals0x7FFE8001()Z

    move-result v0

    return v0
.end method


# virtual methods
.method public findNextStart()Ljava/nio/ByteBuffer;
    .registers 3
    .annotation system Ldalvik/annotation/Throws;
        value = {
            Ljava/io/IOException;
        }
    .end annotation

    .line 866
    nop

    :goto_1
    :try_start_1
    iget v0, p0, Lcom/googlecode/mp4parser/authoring/tracks/DTSTrackImpl$LookAhead;->corePresent:I

    const/4 v1, 0x1

    if-ne v0, v1, :cond_d

    invoke-direct {p0}, Lcom/googlecode/mp4parser/authoring/tracks/DTSTrackImpl$LookAhead;->nextFourEquals0x7FFE8001()Z

    move-result v0

    if-eqz v0, :cond_31

    goto :goto_13

    :cond_d
    invoke-direct {p0}, Lcom/googlecode/mp4parser/authoring/tracks/DTSTrackImpl$LookAhead;->nextFourEquals0x64582025()Z

    move-result v0

    if-eqz v0, :cond_31

    .line 869
    :goto_13
    invoke-direct {p0}, Lcom/googlecode/mp4parser/authoring/tracks/DTSTrackImpl$LookAhead;->discardNext4AndMarkStart()V

    .line 871
    nop

    :goto_17
    iget v0, p0, Lcom/googlecode/mp4parser/authoring/tracks/DTSTrackImpl$LookAhead;->corePresent:I

    if-ne v0, v1, :cond_22

    invoke-direct {p0}, Lcom/googlecode/mp4parser/authoring/tracks/DTSTrackImpl$LookAhead;->nextFourEquals0x7FFE8001orEof()Z

    move-result v0

    if-eqz v0, :cond_2d

    goto :goto_28

    :cond_22
    invoke-direct {p0}, Lcom/googlecode/mp4parser/authoring/tracks/DTSTrackImpl$LookAhead;->nextFourEquals0x64582025orEof()Z

    move-result v0

    if-eqz v0, :cond_2d

    .line 874
    :goto_28
    invoke-direct {p0}, Lcom/googlecode/mp4parser/authoring/tracks/DTSTrackImpl$LookAhead;->getSample()Ljava/nio/ByteBuffer;

    move-result-object v0

    return-object v0

    .line 872
    :cond_2d
    invoke-direct {p0}, Lcom/googlecode/mp4parser/authoring/tracks/DTSTrackImpl$LookAhead;->discardQWord()V

    goto :goto_17

    .line 867
    :cond_31
    invoke-direct {p0}, Lcom/googlecode/mp4parser/authoring/tracks/DTSTrackImpl$LookAhead;->discardByte()V
    :try_end_34
    .catch Ljava/io/EOFException; {:try_start_1 .. :try_end_34} :catch_35

    goto :goto_1

    .line 875
    :catch_35
    move-exception v0

    .line 876
    const/4 v0, 0x0

    return-object v0
.end method