aklive2d/python/fsb5/FSB5.bt

//--------------------------------------
//--- 010 Editor Binary Template
//
// File:     FSB5.bt
// Author:   Simon Pinfold
// Purpose:  Parses the FSB5 (v0 and v1) audio container.
//--------------------------------------

BitfieldDisablePadding();

string OffsetCalcComment(int offset){
    string s;
    SPrintf(s, "Offset = %d from sampleData start", offset * 16);
    return s;
}

string FrequencyLookupComment(int value){
    switch (value){
        case 1: return  "8000Hz";
        case 2: return "11000Hz";
        case 3: return "11025Hz";
        case 4: return "16000Hz";
        case 5: return "22050Hz";
        case 6: return "24000Hz";
        case 7: return "32000Hz";
        case 8: return "44100Hz";
        case 9: return "48000Hz";
        default: { Warning("Invalid value for frequency"); return "Unknown"; }
    }
}

typedef enum<uint32> {
    NONE = 0,
    PCM8 = 1,
    PCM16 = 2,
    PCM24 = 3,
    PCM32 = 4,
    PCMFLOAT = 5,
    GCADPCM = 6,
    IMAADPCM = 7,
    VAG = 8,
    HEVAG = 9,
    XMA = 10,
    MPEG = 11,
    CELT = 12,
    AT9 = 13,
    XWMA = 14,
    VORBIS = 15
} MODE;

typedef enum<uint32> {
    CHANNELS=1,
    FREQUENCY=2,
    LOOP=3,
    XMASEEK=6,
    DSPCOEFF=7,
    XWMADATA=10,
    VORBISDATA=11
} CHUNK_TYPE;

typedef struct {
    char     id[4];
    if (id != "FSB5"){
        Warning( "File is not FSB5. Template stopped." );
        return -1;
    }
    int32     version;
    int32     numSamples;
    int32     sampleHeaderSize;
    int32     nameTableSize;
    int32     dataSize;
    MODE      mode;

    byte      zero[8];
    byte      hash[16];
    byte      dummy[8];
    if (version == 0) {
        uint32 unknown <format=hex, bgcolor=0x0000ff>;
    }
} FSOUND_FSB_HEADER_FSB5;

typedef struct {

    uint32 extraParams :1;
    uint32 frequency   :4 <comment=FrequencyLookupComment>;
    uint32 twoChannels :1;
    uint32 dataOffset  :28 <comment=OffsetCalcComment>;
    uint32 samples     :30;

    if (extraParams){ // has extra params

        local int _next = 1;
        while (_next){
            struct {
                uint32 next :1;

                uint32 size :24;
                CHUNK_TYPE type :7;

                if (type == CHANNELS){
                    Assert(size == 1, "Channels chunk should be 1 byte");
                    byte channels;
                } else if (type == FREQUENCY){
                    Assert(size == 4, "Frequency chunk should be 4 bytes");
                    uint32 frequency;
                } else if (type == LOOP){
                    Assert(size == 8, "Frequency chunk should be 8 bytes");
                    struct {
                        uint32 loopstart;
                        uint32 loopend;
                    } loop;
                } else if (type == XMASEEK){
                    byte xmaSeek[size];
                } else if (type == DSPCOEFF){
                    byte dspCoefficient[size];
                } else if (type == XWMADATA){
                    byte xwmaData[size];
                } else if (type == VORBISDATA){
                    struct {
                        uint32 crc32;

                        local int _remain = size - 4;
                        while (_remain > 0){
                            struct {
                                uint32 offset;
                                if ( _remain > 4) uint32 granulePosition;
                            } packetData;
                             _remain -= 8;
                        }

                        //byte unknownData[size-4] <format=hex>;
                    } vorbis;
                } else {
                    byte unknownData[size];
                }

            } chunk;
            _next = chunk.next;
        }
    }
} FSOUND_FSB_SAMPLE_HEADER;




FSOUND_FSB_HEADER_FSB5 header <bgcolor=0xffbf00>;

struct {
    local int i;
    for (i = 0; i < header.numSamples; i++) {
        FSOUND_FSB_SAMPLE_HEADER sampleHeader;
    }
} sampleHeaders <bgcolor=0x00ffff>;

if (header.nameTableSize) {
    local int nameTableStart = FTell();
    struct {
        local int i;
        for (i = 0; i < header.numSamples; i++) {
            uint32 nameStart;
        }
        for (i = 0; i < header.numSamples; i++) {
            struct {
                Assert(nameTableStart + nameTable.nameStart[i] == FTell(), "nameStart did not point to expected start of string");
                string name;
            } name;
        }
    } nameTable <bgcolor=0x33ff00>;
} else {
    Printf("No name table\n");
}

byte pad[(sizeof(header) + header.sampleHeaderSize + header.nameTableSize) - FTell()];

struct {
    local int dataStart = FTell();
    local int dataEnd   = dataStart + header.dataSize;
    local int i, start, end;
    for (i = 0; i < header.numSamples; i++) {
        end = dataEnd;
        if (i+1 < header.numSamples) end = dataStart + sampleHeaders.sampleHeader[i+1].dataOffset * 16;
        start                            = dataStart + sampleHeaders.sampleHeader[i  ].dataOffset * 16;
        Assert(start == FTell(), "Wrong length calculated for sample data");
        struct {
           if (header.mode == VORBIS){
                while (!FEof()){
                    struct {
                        ushort size;

                        if (!size)
                            return 0;
                        ubyte  audio :1;
                        ubyte  r :7;
                        ubyte  data[size-1];
                    } packet;
                }
            } else
                byte bytes[end - start] <bgcolor=cLtGray>;
        } sample;
    }
} sampleData;