#include "meta.h"
#include "../util.h"


/* MUSX (Version 004) */
VGMSTREAM * init_vgmstream_musx_v004(STREAMFILE *streamFile) {
    VGMSTREAM * vgmstream = NULL;
    off_t start_offset;
    int loop_flag, channel_count;


    /* checks */
    if (!check_extensions(streamFile, "musx"))
        goto fail;
    if (read_32bitBE(0x00,streamFile) != 0x4D555358) /* "MUSX" */
        goto fail;
    if (read_32bitBE(0x08,streamFile) != 0x04000000)
        goto fail;

    loop_flag = (read_32bitLE(0x840,streamFile) != 0xFFFFFFFF);
    channel_count = 2;

    /* build the VGMSTREAM */
    vgmstream = allocate_vgmstream(channel_count,loop_flag);
    if (!vgmstream) goto fail;

    switch (read_32bitBE(0x10,streamFile)) {
        case 0x5053325F: /* PS2_ */
            start_offset = read_32bitLE(0x28,streamFile);
            vgmstream->channels = channel_count;
            vgmstream->sample_rate = 32000;
            vgmstream->coding_type = coding_PSX;
            vgmstream->num_samples = (read_32bitLE(0x0C,streamFile))/16/channel_count*28;
            vgmstream->layout_type = layout_interleave;
            vgmstream->interleave_block_size = 0x80;
            if (loop_flag) {
                vgmstream->loop_start_sample = (read_32bitLE(0x890,streamFile))/16/channel_count*28;
                vgmstream->loop_end_sample = (read_32bitLE(0x89C,streamFile))/16/channel_count*28;
            }
            break;
        case 0x47435F5F: /* GC__ */
            start_offset = read_32bitBE(0x28,streamFile);
            vgmstream->channels = channel_count;
            vgmstream->sample_rate = 32000;
            vgmstream->coding_type = coding_DAT4_IMA;
            vgmstream->num_samples = (read_32bitBE(0x2C,streamFile))/16/channel_count*28;
            vgmstream->layout_type = layout_interleave;
            vgmstream->interleave_block_size = 0x20;
            if (loop_flag) {
                vgmstream->loop_start_sample = (read_32bitBE(0x890,streamFile))/16/channel_count*28;
                vgmstream->loop_end_sample = (read_32bitBE(0x89C,streamFile))/16/channel_count*28;
            }
            break;
        case 0x58425F5F: /* XB__ */
            start_offset = read_32bitLE(0x28,streamFile);
            vgmstream->channels = channel_count;
            vgmstream->sample_rate = 44100;
            vgmstream->coding_type = coding_DAT4_IMA;
            vgmstream->num_samples = (read_32bitLE(0x2C,streamFile))/16/channel_count*28;
            vgmstream->layout_type = layout_interleave;
            vgmstream->interleave_block_size = 0x20;
            if (loop_flag) {
                vgmstream->loop_start_sample = (read_32bitLE(0x890,streamFile))/16/channel_count*28;
                vgmstream->loop_end_sample = (read_32bitLE(0x89C,streamFile))/16/channel_count*28;
            }
            break;
        default:
            goto fail;
    }

    vgmstream->meta_type = meta_MUSX_V004;
    
    if (!vgmstream_open_stream(vgmstream,streamFile,start_offset))
        goto fail;
    return vgmstream;

fail:
    close_vgmstream(vgmstream);
    return NULL;
}


/* MUSX (Version 005) [Predator: Concrete Jungle (PS2/Xbox) ] */
VGMSTREAM * init_vgmstream_musx_v005(STREAMFILE *streamFile) {
    VGMSTREAM * vgmstream = NULL;
    off_t start_offset;
    int loop_flag, channel_count;


    /* checks */
    /* .sfx: Batman Begins, .musx: header id */
    if (!check_extensions(streamFile, "musx,sfx"))
        goto fail;
    if (read_32bitBE(0x00,streamFile) != 0x4D555358) /* "MUSX" */
        goto fail;
    if (read_32bitBE(0x08,streamFile) != 0x05000000)
        goto fail;

    loop_flag = (read_32bitLE(0x840,streamFile) != 0xFFFFFFFF);
    channel_count = 2;

    /* build the VGMSTREAM */
    vgmstream = allocate_vgmstream(channel_count,loop_flag);
    if (!vgmstream) goto fail;

    switch (read_32bitBE(0x10,streamFile)) {
        case 0x5053325F: /* PS2_ */
            start_offset = read_32bitLE(0x28,streamFile);
            vgmstream->channels = channel_count;
            vgmstream->sample_rate = 32000;
            vgmstream->coding_type = coding_PSX;
            vgmstream->num_samples = (read_32bitLE(0x0C,streamFile))/16/channel_count*28;
            vgmstream->layout_type = layout_interleave;
            vgmstream->interleave_block_size = 0x80;
            if (loop_flag) {
                vgmstream->loop_start_sample = (read_32bitLE(0x890,streamFile))/16/channel_count*28;
                vgmstream->loop_end_sample = (read_32bitLE(0x89C,streamFile))/16/channel_count*28;
            }
            break;
        case 0x47435F5F: /* GC__ */
            start_offset = read_32bitBE(0x28,streamFile);
            vgmstream->channels = channel_count;
            vgmstream->sample_rate = 32000;
            vgmstream->coding_type = coding_DAT4_IMA;
            vgmstream->num_samples = (read_32bitBE(0x2C,streamFile))/16/channel_count*28;
            vgmstream->layout_type = layout_interleave;
            vgmstream->interleave_block_size = 0x20;
            if (loop_flag) {
                vgmstream->loop_start_sample = (read_32bitBE(0x890,streamFile))/16/channel_count*28;
                vgmstream->loop_end_sample = (read_32bitBE(0x89C,streamFile))/16/channel_count*28;
            }
            break;
        case 0x58425F5F: /* XB__ */
            start_offset = read_32bitLE(0x28,streamFile);
            vgmstream->channels = channel_count;
            vgmstream->sample_rate = 44100;
            vgmstream->coding_type = coding_DAT4_IMA;
            vgmstream->num_samples = (read_32bitLE(0x2C,streamFile))/16/channel_count*28;
            vgmstream->layout_type = layout_interleave;
            vgmstream->interleave_block_size = 0x20;
            if (loop_flag) {
                vgmstream->loop_start_sample = (read_32bitLE(0x890,streamFile))/16/channel_count*28;
                vgmstream->loop_end_sample = (read_32bitLE(0x89C,streamFile))/16/channel_count*28;
            }
            break;
        default:
            goto fail;
    }

    vgmstream->meta_type = meta_MUSX_V005;

    if (!vgmstream_open_stream(vgmstream,streamFile,start_offset))
        goto fail;
    return vgmstream;

fail:
    close_vgmstream(vgmstream);
    return NULL;
}


/* MUSX (Version 006) [Batman Begins (GC)] */
VGMSTREAM * init_vgmstream_musx_v006(STREAMFILE *streamFile) {
    VGMSTREAM * vgmstream = NULL;
    off_t start_offset;
    int loop_flag, channel_count;


    /* checks */
    /* .sfx: Batman Begins, .musx: header id */
    if (!check_extensions(streamFile, "sfx,musx"))
        goto fail;
    if (read_32bitBE(0x00,streamFile) != 0x4D555358) /* "MUSX" */
        goto fail;
    if (read_32bitBE(0x08,streamFile) != 0x06000000)
        goto fail;

    loop_flag = (read_32bitLE(0x840,streamFile)!=0xFFFFFFFF);
    channel_count = 2;

    //todo some files (ex. Batman Begins) have a subsong table at 0x800, not sure what signals it (flags at 0x04/0x14?)

    /* build the VGMSTREAM */
    vgmstream = allocate_vgmstream(channel_count,loop_flag);
    if (!vgmstream) goto fail;

    switch (read_32bitBE(0x10,streamFile)) {
        case 0x5053325F: /* PS2_ */
            start_offset = read_32bitLE(0x28,streamFile);
            vgmstream->channels = channel_count;
            vgmstream->sample_rate = 32000;
            vgmstream->coding_type = coding_PSX;
            vgmstream->num_samples = (read_32bitLE(0x0C,streamFile))*28/16/channel_count;
            vgmstream->layout_type = layout_interleave;
            vgmstream->interleave_block_size = 0x80;
            vgmstream->meta_type = meta_MUSX_V006;
            if (loop_flag) {
                vgmstream->loop_start_sample = (read_32bitLE(0x890,streamFile))*28/16/channel_count;
                vgmstream->loop_end_sample = (read_32bitLE(0x89C,streamFile))*28/16/channel_count;
            }
            break;
        case 0x47435F5F: /* GC__ */
            start_offset = read_32bitBE(0x28,streamFile);
            if (start_offset == 0 || start_offset == 0xABABABAB) goto fail; /* some are empty */

            vgmstream->channels = channel_count;
            vgmstream->sample_rate = 32000;
            vgmstream->coding_type = coding_DAT4_IMA;
            vgmstream->num_samples = (read_32bitBE(0x2C,streamFile))*28/16/channel_count;
            vgmstream->layout_type = layout_interleave;
            vgmstream->interleave_block_size = 0x20;
            vgmstream->meta_type = meta_MUSX_V006;
            if (loop_flag) {
                vgmstream->loop_start_sample = (read_32bitBE(0x890,streamFile))*28/16/channel_count;
                vgmstream->loop_end_sample = (read_32bitBE(0x89C,streamFile))*28/16/channel_count;
            }
            break;
        default:
            goto fail;
    }


    if (!vgmstream_open_stream(vgmstream,streamFile,start_offset))
        goto fail;
    return vgmstream;

fail:
    close_vgmstream(vgmstream);
    return NULL;
}


/* MUSX (Version 010) [Dead Space: Extraction (Wii), Rio (PS3), Pirates of the Caribbean: At World's End (PSP)] */
VGMSTREAM * init_vgmstream_musx_v010(STREAMFILE *streamFile) {
    VGMSTREAM * vgmstream = NULL;
    char filename[PATH_LIMIT];
    off_t start_offset;
    int musx_type; /* determining the decoder by strings like "PS2_", "GC__" and so on */
    //int musx_version; /* 0x08 provides a "version" byte */
    int loop_flag = 0;
    int channel_count;

    /* check extension, case insensitive */
    streamFile->get_name(streamFile,filename,sizeof(filename));
    if (strcasecmp("musx",filename_extension(filename))) goto fail;

    /* check header */
    if (read_32bitBE(0x00,streamFile) != 0x4D555358) /* "MUSX" */
          goto fail;
    if (read_32bitBE(0x800,streamFile) == 0x53424E4B) /* "SBNK", */ // SoundBank, refuse
          goto fail;
      if (read_32bitBE(0x08,streamFile) != 0x0A000000) /* "0x0A000000" */
          goto fail;

    loop_flag = ((read_32bitLE(0x34,streamFile)!=0x00000000) &&
                            (read_32bitLE(0x34,streamFile)!=0xABABABAB));
    channel_count = 2;
    
    musx_type=(read_32bitBE(0x10,streamFile));

    if (musx_type == 0x5749495F &&  /* WII_ */
        (read_16bitBE(0x40,streamFile) == 0x4441) && /* DA */
        (read_8bit(0x42,streamFile) == 0x54)) /* T */
    {
        channel_count = read_32bitLE(0x48,streamFile);
        loop_flag = (read_32bitLE(0x64,streamFile) != -1);
    }
    if (musx_type == 0x5053335F &&  /* PS3_ */
        (read_16bitBE(0x40,streamFile) == 0x4441) && /* DA */
        (read_8bit(0x42,streamFile) == 0x54)) /* T */
    {
        channel_count = read_32bitLE(0x48,streamFile);
        loop_flag = (read_32bitLE(0x64,streamFile) != -1);
    }
    if (0x58455F5F == musx_type) /* XE__ */
    {
        loop_flag = 0;
    }

    /* build the VGMSTREAM */
    vgmstream = allocate_vgmstream(channel_count,loop_flag);
    if (!vgmstream) goto fail;

    /* fill in the vital statistics */
    switch (musx_type) {
        case 0x5053325F: /* PS2_ */
            start_offset = 0x800;
            vgmstream->channels = channel_count;
            vgmstream->sample_rate = 32000;
            vgmstream->coding_type = coding_PSX;
            vgmstream->num_samples = read_32bitLE(0x40,streamFile);
            vgmstream->layout_type = layout_interleave;
            vgmstream->interleave_block_size = 0x80;
            vgmstream->meta_type = meta_MUSX_V010;
            if (loop_flag)
            {
                vgmstream->loop_start_sample = read_32bitLE(0x44,streamFile);
                vgmstream->loop_end_sample = read_32bitLE(0x40,streamFile);
            }
            break;
        case 0x5053505F: /* PSP_ */
            start_offset = 0x800;
            vgmstream->channels = channel_count;
            vgmstream->sample_rate = 32768;
            vgmstream->coding_type = coding_PSX;
            vgmstream->num_samples = (read_32bitLE(0xC,streamFile))*28/32;
            vgmstream->layout_type = layout_interleave;
            vgmstream->interleave_block_size = 0x80;
            vgmstream->meta_type = meta_MUSX_V010;
            break;
        case 0x5053335F: /* PS3_ */
            start_offset = 0x800;
            vgmstream->channels = channel_count;
            vgmstream->coding_type = coding_DAT4_IMA;
            vgmstream->layout_type = layout_interleave;
            vgmstream->interleave_block_size = 0x20;
            vgmstream->meta_type = meta_MUSX_V010;

            if (read_32bitBE(0x40,streamFile)==0x44415438){
            vgmstream->num_samples = read_32bitLE(0x60,streamFile);
            vgmstream->sample_rate = read_32bitLE(0x4C,streamFile);
            if (loop_flag)
            {
                vgmstream->loop_start_sample = read_32bitLE(0x64,streamFile);
                vgmstream->loop_end_sample = read_32bitLE(0x60,streamFile);
            }
            }
            else {
                vgmstream->sample_rate = 44100;
                vgmstream->num_samples = (get_streamfile_size(streamFile)-0x800)/2/(0x20)*((0x20-4)*2);
            if (loop_flag)
            {
                vgmstream->loop_start_sample = read_32bitLE(0x44,streamFile);
                vgmstream->loop_end_sample = read_32bitLE(0x40,streamFile);
            }
            }
            break;
        case 0x5749495F: /* WII_ */
            start_offset = 0x800;
            vgmstream->channels = channel_count;
            vgmstream->sample_rate = read_32bitLE(0x4C,streamFile);
            switch (read_32bitBE(0x40,streamFile))
            {
                case 0x44415434:    /* DAT4 */
                case 0x44415438:    /* DAT8 [GoldenEye 007 (Wii)] */
                    vgmstream->coding_type = coding_DAT4_IMA;
                    break;
                default:
                    goto fail;
            }
            vgmstream->num_samples = read_32bitLE(0x60,streamFile);
            vgmstream->layout_type = layout_interleave;
            vgmstream->interleave_block_size = 0x20;
            vgmstream->meta_type = meta_MUSX_V010;
            if (loop_flag)
            {
                vgmstream->loop_start_sample = read_32bitLE(0x64,streamFile);
                vgmstream->loop_end_sample = read_32bitLE(0x60,streamFile);
            }

            break;
        case 0x58455F5F: /* XE__ */
            start_offset = 0x800;
            vgmstream->sample_rate = 32000;
            vgmstream->coding_type = coding_DAT4_IMA;
            vgmstream->num_samples = (get_streamfile_size(streamFile)-0x800)/2/(0x20)*((0x20-4)*2);
            vgmstream->layout_type = layout_interleave;
            vgmstream->interleave_block_size = 0x20;
            vgmstream->meta_type = meta_MUSX_V010;
            
            break;
        default:
            goto fail;
    }

    /* open the file for reading */
    {
        int i;
        STREAMFILE * file;
        file = streamFile->open(streamFile,filename,STREAMFILE_DEFAULT_BUFFER_SIZE);
        if (!file) goto fail;
        for (i=0;i<channel_count;i++) {
            vgmstream->ch[i].streamfile = file;

            vgmstream->ch[i].channel_start_offset=
                vgmstream->ch[i].offset=start_offset+
                vgmstream->interleave_block_size*i;

        }
    }

    return vgmstream;

fail:
    close_vgmstream(vgmstream);
    return NULL;
}


/* MUSX (Version 201) */
VGMSTREAM * init_vgmstream_musx_v201(STREAMFILE *streamFile) {
    VGMSTREAM * vgmstream = NULL;
    char filename[PATH_LIMIT];
    off_t start_offset;
    //int musx_version; /* 0x08 provides a "version" byte */
    int loop_flag;
    int channel_count;
    int loop_detect;
    int loop_offsets;

    /* check extension, case insensitive */
    streamFile->get_name(streamFile,filename,sizeof(filename));
    if (strcasecmp("musx",filename_extension(filename))) goto fail;

    /* check header */
    if (read_32bitBE(0x00,streamFile) != 0x4D555358) /* "MUSX" */
        goto fail;
    if ((read_32bitBE(0x08,streamFile) != 0xC9000000) &&
        (read_32bitLE(0x08,streamFile) != 0xC9000000)) /* "0xC9000000" */
        goto fail;

    channel_count = 2;

    loop_detect = read_32bitBE(0x800,streamFile);
    switch (loop_detect) {
        case 0x02000000:
        loop_offsets = 0x8E0;
    break;
        case 0x03000000:
        loop_offsets = 0x880;
    break;
        case 0x04000000:
        loop_offsets = 0x8B4;
    break;
        case 0x05000000:
        loop_offsets = 0x8E8;
    break;
        case 0x06000000:
        loop_offsets = 0x91C;
    break;
        default:
            goto fail;
    }

    loop_flag = (read_32bitLE(loop_offsets+0x04,streamFile) !=0x00000000);
    start_offset = read_32bitLE(0x18,streamFile);

    /* build the VGMSTREAM */
    vgmstream = allocate_vgmstream(channel_count,loop_flag);
    if (!vgmstream) goto fail;

    {
        vgmstream->channels = channel_count;
        vgmstream->sample_rate = 32000;
        vgmstream->coding_type = coding_PSX;
        vgmstream->num_samples = read_32bitLE(loop_offsets,streamFile)*28/16/channel_count;
        if (loop_flag) {
            vgmstream->loop_start_sample = read_32bitLE(loop_offsets+0x10,streamFile)*28/16/channel_count;
            vgmstream->loop_end_sample = read_32bitLE(loop_offsets,streamFile)*28/16/channel_count;
        }
        vgmstream->layout_type = layout_interleave;
        vgmstream->interleave_block_size = 0x80;
        vgmstream->meta_type = meta_MUSX_V201;
    }

    /* open the file for reading */
    {
        int i;
        STREAMFILE * file;
        file = streamFile->open(streamFile,filename,STREAMFILE_DEFAULT_BUFFER_SIZE);
        if (!file) goto fail;
        for (i=0;i<channel_count;i++) {
            vgmstream->ch[i].streamfile = file;

            vgmstream->ch[i].channel_start_offset=
                vgmstream->ch[i].offset=start_offset+
                vgmstream->interleave_block_size*i;

        }
    }

    return vgmstream;

fail:
    close_vgmstream(vgmstream);
    return NULL;
}