vgmstream/src/meta/ea_schl.c

#include "meta.h"
#include "../layout/layout.h"
#include "../coding/coding.h"
#include "ea_schl_streamfile.h"

/* header version */
#define EA_VERSION_NONE         -1
#define EA_VERSION_V0           0x00  // ~early PC (when codec1 was used)
#define EA_VERSION_V1           0x01  // ~PC
#define EA_VERSION_V2           0x02  // ~PS era
#define EA_VERSION_V3           0x03  // ~PS2 era

/* platform constants (unasigned values seem internal only) */
#define EA_PLATFORM_GENERIC     -1    // typically Wii/X360/PS3/videos
#define EA_PLATFORM_PC          0x00
#define EA_PLATFORM_PSX         0x01
#define EA_PLATFORM_N64         0x02
#define EA_PLATFORM_MAC         0x03
#define EA_PLATFORM_SAT         0x04
#define EA_PLATFORM_PS2         0x05
#define EA_PLATFORM_GC_WII      0x06  // reused later for Wii
#define EA_PLATFORM_XBOX        0x07
#define EA_PLATFORM_X360        0x09  // also "Xenon"
#define EA_PLATFORM_PSP         0x0A
#define EA_PLATFORM_PS3         0x0E  // very rare [Need for Speed: Carbon (PS3)]
#define EA_PLATFORM_3DS         0x14

/* codec constants (undefined are probably reserved, ie.- sx.exe encodes PCM24/DVI but no platform decodes them) */
/* CODEC1 values were used early, then they migrated to CODEC2 values */
#define EA_CODEC1_NONE          -1
#define EA_CODEC1_PCM           0x00
#define EA_CODEC1_VAG           0x01  // unsure
#define EA_CODEC1_EAXA          0x07
#define EA_CODEC1_MT10          0x09
//#define EA_CODEC1_N64         ?

#define EA_CODEC2_NONE          -1
#define EA_CODEC2_MT10          0x04
#define EA_CODEC2_VAG           0x05
#define EA_CODEC2_S16BE         0x07
#define EA_CODEC2_S16LE         0x08
#define EA_CODEC2_S8            0x09
#define EA_CODEC2_EAXA          0x0A
#define EA_CODEC2_LAYER2        0x0F
#define EA_CODEC2_LAYER3        0x10
#define EA_CODEC2_GCADPCM       0x12
#define EA_CODEC2_XBOXADPCM     0x14
#define EA_CODEC2_MT5           0x16
#define EA_CODEC2_EALAYER3      0x17
#define EA_CODEC2_ATRAC3PLUS    0x1B

/* Block headers, SCxy - where x is block ID and y is endianness flag (always 'l'?) */
#define EA_BLOCKID_HEADER       0x5343486C /* "SCHl" */
#define EA_BLOCKID_COUNT        0x5343436C /* "SCCl" */
#define EA_BLOCKID_DATA         0x5343446C /* "SCDl" */
#define EA_BLOCKID_LOOP         0x53434C6C /* "SCLl */
#define EA_BLOCKID_END          0x5343456C /* "SCEl" */

/* Localized block headers, Sxyy - where x is block ID and yy is lang code (e.g. "SHEN"), used in videos */
#define EA_BLOCKID_LOC_HEADER   0x53480000 /* "SH" */
#define EA_BLOCKID_LOC_COUNT    0x53430000 /* "SC" */
#define EA_BLOCKID_LOC_DATA     0x53440000 /* "SD" */
#define EA_BLOCKID_LOC_END      0x53450000 /* "SE" */

#define EA_BLOCKID_LOC_EN       0x0000454E
#define EA_BLOCKID_LOC_FR       0x00004652
#define EA_BLOCKID_LOC_GE       0x00004745
#define EA_BLOCKID_LOC_IT       0x00004954
#define EA_BLOCKID_LOC_SP       0x00005350
#define EA_BLOCKID_LOC_RU       0x00005255
#define EA_BLOCKID_LOC_JA       0x00004A41

#define EA_BNK_HEADER_LE        0x424E4B6C /* "BNKl" */
#define EA_BNK_HEADER_BE        0x424E4B62 /* "BNKb" */

#define EA_MAX_CHANNELS         6

typedef struct {
    int32_t num_samples;
    int32_t sample_rate;
    int32_t channels;
    int32_t platform;
    int32_t version;
    int32_t bps;
    int32_t codec1;
    int32_t codec2;

    int32_t loop_start;
    int32_t loop_end;

    off_t offsets[EA_MAX_CHANNELS];
    off_t coefs[EA_MAX_CHANNELS];

    int big_endian;
    int loop_flag;
    int codec_config;
} ea_header;

static VGMSTREAM * parse_schl_block(STREAMFILE *streamFile, off_t offset, int total_streams);
static VGMSTREAM * parse_bnk_header(STREAMFILE *streamFile, off_t offset, int target_stream, int total_streams);
static int parse_variable_header(STREAMFILE* streamFile, ea_header* ea, off_t begin_offset, int max_length, int bnk_version);
static uint32_t read_patch(STREAMFILE* streamFile, off_t* offset);
static int get_ea_stream_total_samples(STREAMFILE* streamFile, off_t start_offset, VGMSTREAM* vgmstream);
static off_t get_ea_stream_mpeg_start_offset(STREAMFILE* streamFile, off_t start_offset, const ea_header* ea);
static VGMSTREAM * init_vgmstream_ea_variable_header(STREAMFILE *streamFile, ea_header *ea, off_t start_offset, int is_bnk, int total_streams);

/* EA SCHl with variable header - from EA games (roughly 1997~2010); generated by EA Canada's sx.exe/Sound eXchange */
VGMSTREAM * init_vgmstream_ea_schl(STREAMFILE *streamFile) {
    /* check extension; exts don't seem enforced by EA's tools, but usually:
     * STR/ASF/MUS ~early, EAM ~mid, SNG/AUD ~late, rest uncommon/one game (ex. STRM: MySims Kingdom Wii) */
    if (!check_extensions(streamFile,"str,asf,mus,eam,sng,aud,sx,strm,xa,xsf,exa,stm,trj,trm"))
        goto fail;

    /* check header */
    if (read_32bitBE(0x00,streamFile) != EA_BLOCKID_HEADER &&  /* "SCHl" */
        read_32bitBE(0x00,streamFile) != (EA_BLOCKID_LOC_HEADER | EA_BLOCKID_LOC_EN) &&  /* "SHEN" */
        read_32bitBE(0x00,streamFile) != (EA_BLOCKID_LOC_HEADER | EA_BLOCKID_LOC_FR) &&  /* "SHFR" */
        read_32bitBE(0x00,streamFile) != (EA_BLOCKID_LOC_HEADER | EA_BLOCKID_LOC_GE) &&  /* "SHGE" */
        read_32bitBE(0x00,streamFile) != (EA_BLOCKID_LOC_HEADER | EA_BLOCKID_LOC_IT) &&  /* "SHIT" */
        read_32bitBE(0x00,streamFile) != (EA_BLOCKID_LOC_HEADER | EA_BLOCKID_LOC_SP) &&  /* "SHSP" */
        read_32bitBE(0x00,streamFile) != (EA_BLOCKID_LOC_HEADER | EA_BLOCKID_LOC_RU) &&  /* "SHRU" */
        read_32bitBE(0x00,streamFile) != (EA_BLOCKID_LOC_HEADER | EA_BLOCKID_LOC_JA))    /* "SHJA" */
        goto fail;

    /* Stream is divided into blocks/chunks: SCHl=audio header, SCCl=count of SCDl, SCDl=data xN, SCLl=loop end, SCEl=end.
     * Video uses picture blocks (MVhd/MV0K/etc) and sometimes multiaudio blocks (SHxx/SCxx/SDxx/SExx where xx=language=EN/FR/GE/IT/SP/RU/JA).
     * The number/size is affected by: block rate setting, sample rate, channels, CPU location (SPU/main/DSP/others), etc */
    return parse_schl_block(streamFile, 0x00, 0);

fail:
    return NULL;
}

/* EA BNK with variable header - from EA games SFXs; also created by sx.exe */
VGMSTREAM * init_vgmstream_ea_bnk(STREAMFILE *streamFile) {
    off_t offset;

    /* check extension */
    /* .bnk: sfx, .sdt: speech, .mus: streams/jingles (rare) */
    if (!check_extensions(streamFile,"bnk,sdt,mus"))
        goto fail;

    /* check header (doesn't use EA blocks, otherwise very similar to SCHl) */
    if (read_32bitBE(0x100,streamFile) == EA_BNK_HEADER_LE)
        offset = 0x100; /* Harry Potter and the Goblet of Fire (PS2) .mus have weird extra 0x100 bytes */
    else
        offset = 0x00;

    return parse_bnk_header(streamFile, offset, streamFile->stream_index, 0);
    
fail:
    return NULL;
}

/* EA ABK - common soundbank format in 6th-gen games, can reference RAM and streamed assets */
/* RAM assets are stored in embedded BNK file */
/* streamed assets are stored externally in AST file (mostly seen in earlier 6th-gen games) */
VGMSTREAM * init_vgmstream_ea_abk(STREAMFILE *streamFile) {
    int bnk_target_stream, is_dupe, total_sounds = 0, target_stream = streamFile->stream_index;
    off_t bnk_offset, header_table_offset, base_offset, value_offset, table_offset, entry_offset, target_entry_offset, schl_offset;
    uint32_t i, j, k, num_sounds, total_sound_tables;
    uint16_t num_tables;
    uint8_t sound_type, num_entries;
    off_t sound_table_offsets[0x2000];
    STREAMFILE * astData = NULL;
    VGMSTREAM * vgmstream;
    int32_t (*read_32bit)(off_t,STREAMFILE*);
    int16_t (*read_16bit)(off_t,STREAMFILE*);

    /* check extension */
    if (!check_extensions(streamFile, "abk"))
        goto fail;

    if (read_32bitBE(0x00, streamFile) != 0x41424B43) /* "ABKC" */
        goto fail;

    /* use table offset to check endianness */
    if (guess_endianness32bit(0x1C,streamFile)) {
        read_32bit = read_32bitBE;
        read_16bit = read_16bitBE;
    } else {
        read_32bit = read_32bitLE;
        read_16bit = read_16bitLE;
    }

    if (target_stream == 0) target_stream = 1;
    if (target_stream < 0)
        goto fail;

    num_tables = read_16bit(0x0A, streamFile);
    header_table_offset = read_32bit(0x1C, streamFile);
    bnk_offset = read_32bit(0x20, streamFile);
    target_entry_offset = 0;
    total_sound_tables = 0;

    /* check to avoid clashing with the newer ABK format */
    if (bnk_offset &&
        read_32bitBE(bnk_offset, streamFile) != EA_BNK_HEADER_LE &&
        read_32bitBE(bnk_offset, streamFile) != EA_BNK_HEADER_BE)
        goto fail;

    for (i = 0; i < num_tables; i++) {
        num_entries = read_8bit(header_table_offset + 0x24, streamFile);
        base_offset = read_32bit(header_table_offset + 0x2C, streamFile);
        if (num_entries == 0xff) goto fail; /* EOF read */

        for (j = 0; j < num_entries; j++) {
            value_offset = read_32bit(header_table_offset + 0x3C + 0x04 * j, streamFile);
            table_offset = read_32bit(base_offset + value_offset + 0x04, streamFile);

            /* For some reason, there are duplicate entries pointing at the same sound tables */
            is_dupe = 0;
            for (k = 0; k < total_sound_tables; k++)
            {
                if (table_offset==sound_table_offsets[k])
                {
                    is_dupe = 1;
                    break;
                }
            }

            if (is_dupe)
                continue;

            sound_table_offsets[total_sound_tables++] = table_offset;
            num_sounds = read_32bit(table_offset, streamFile);
            if (num_sounds == 0xffffffff) goto fail; /* EOF read */

            for (k = 0; k < num_sounds; k++) {
                entry_offset = table_offset + 0x04 + 0x0C * k;
                sound_type = read_8bit(entry_offset + 0x00, streamFile);

                /* some of these dummies pointing at sound 0 in BNK */
                if (sound_type == 0x00 && read_32bit(entry_offset + 0x04, streamFile) == 0)
                    continue;

                total_sounds++;
                if (target_stream == total_sounds)
                    target_entry_offset = entry_offset;
            }
        }

        /* there can be another set of values, don't know what they mean */
        num_entries += read_8bit(header_table_offset + 0x27, streamFile);
        header_table_offset += 0x3C + num_entries * 0x04;
    }

    if (target_entry_offset == 0)
        goto fail;

    /* 0x00: type (0x00 - normal, 0x01 - streamed, 0x02 - streamed and prefetched(?) */
    /* 0x01: ??? */
    /* 0x04: index for normal sounds, offset for streamed sounds */
    /* 0x08: offset for prefetched sounds */
    sound_type = read_8bit(target_entry_offset + 0x00, streamFile);
    
    switch (sound_type) {
    case 0x00:
        if (!bnk_offset)
            goto fail;

        bnk_target_stream = read_32bit(target_entry_offset + 0x04, streamFile) + 1;
        vgmstream = parse_bnk_header(streamFile, bnk_offset, bnk_target_stream, total_sounds);
        if (!vgmstream)
            goto fail;
        break;

    case 0x01:
    case 0x02:
        astData = open_streamfile_by_ext(streamFile, "ast");
        if (!astData)
            goto fail;

        if (sound_type == 0x01)
            schl_offset = read_32bit(target_entry_offset + 0x04, streamFile);
        else
            schl_offset = read_32bit(target_entry_offset + 0x08, streamFile);

        if (read_32bitBE(schl_offset, astData) != EA_BLOCKID_HEADER)
            goto fail;

        vgmstream = parse_schl_block(astData, schl_offset, total_sounds);
        if (!vgmstream)
            goto fail;
        break;

    default:
        goto fail;
        break;
    }

    close_streamfile(astData);
    return vgmstream;

fail:
    close_streamfile(astData);
    return NULL;
}

/* EA HDR/DAT combo - seen in late 6th-gen games, used for storing speech and other streamed sounds (except for music) */
VGMSTREAM * init_vgmstream_ea_hdr_dat(STREAMFILE *streamFile) {
    int target_stream = streamFile->stream_index;
    uint8_t userdata_size, total_sounds;
    off_t schl_offset, offset_mult;
    STREAMFILE *datFile = NULL;
    VGMSTREAM *vgmstream;

    /* main header's endianness is platform-native but we only care about one byte values */
    /* 0x00: ID */
    /* 0x02: sub-ID (used for different police voices in NFS games) */
    /* 0x04: (low nibble) userdata size */
    /* 0x04: (high nibble) ??? */
    /* 0x05: number of files */
    /* 0x06: ??? */
    /* 0x07: offset multiplier flag */
    /* 0x08: combined size of all sounds without padding divided by 0x0100 */
    /* 0x0C: table start */

    /* no nice way to validate these so we do what we can */
    /* must be accompanied by DAT file with SCHl sounds */
    datFile = open_streamfile_by_ext(streamFile, "dat");
    if (!datFile)
        goto fail;

    if (read_32bitBE(0x00, datFile) != EA_BLOCKID_HEADER)
        goto fail;

    userdata_size = read_8bit(0x04, streamFile) & 0x0F;
    total_sounds = read_8bit(0x05, streamFile);
    offset_mult = (off_t)read_8bit(0x07, streamFile) * 0x0100 + 0x0100;

    if (target_stream == 0) target_stream = 1;
    if (target_stream < 0 || total_sounds == 0 || target_stream > total_sounds)
        goto fail;

    /* offsets are always big endian */
    schl_offset = (off_t)read_16bitBE(0x0C + (0x02+userdata_size) * (target_stream-1), streamFile) * offset_mult;
    if (read_32bitBE(schl_offset, datFile) != EA_BLOCKID_HEADER)
        goto fail;

    vgmstream = parse_schl_block(datFile, schl_offset, total_sounds);
    if (!vgmstream)
        goto fail;

    close_streamfile(datFile);
    return vgmstream;

fail:
    close_streamfile(datFile);
    return NULL;
}

/* EA IDX/BIG combo - basically a set of HDR/DAT compiled into one file */
VGMSTREAM * init_vgmstream_ea_idx_big(STREAMFILE *streamFile) {
    int target_stream = streamFile->stream_index, total_sounds, subsound_index;
    uint32_t i, num_hdr;
    uint16_t hdr_id, hdr_subid;
    uint8_t userdata_size, hdr_sounds;
    off_t entry_offset, hdr_offset, base_offset, schl_offset, offset_mult;
    //size_t hdr_size;
    char stream_name[STREAM_NAME_SIZE];
    STREAMFILE *bigFile = NULL;
    VGMSTREAM *vgmstream = NULL;
    int32_t (*read_32bit)(off_t,STREAMFILE*);
    int16_t (*read_16bit)(off_t,STREAMFILE*);

    /* seems to always start with 0x00000001 */
    if (read_32bitLE(0x00, streamFile) != 0x00000001 &&
        read_32bitBE(0x00, streamFile) != 0x00000001)
        goto fail;

    bigFile = open_streamfile_by_ext(streamFile, "big");
    if (!bigFile)
        goto fail;

    if (read_32bitBE(0x00, bigFile) != EA_BLOCKID_HEADER)
        goto fail;

    /* use number of files for endianness check */
    if (guess_endianness32bit(0x04,streamFile)) {
        read_32bit = read_32bitBE;
        read_16bit = read_16bitBE;
    } else {
        read_32bit = read_32bitLE;
        read_16bit = read_16bitLE;
    }

    num_hdr = read_32bit(0x04, streamFile);
    if (read_32bit(0x54,streamFile) != num_hdr)
        goto fail;

    if (target_stream == 0) target_stream = 1;
    schl_offset = 0;
    total_sounds = 0;
    schl_offset = 0xFFFFFFFF;

    for (i = 0; i < num_hdr; i++) {
        entry_offset = 0x58 + 0x10 * i;
        //hdr_size = read_32bit(entry_offset + 0x04, streamFile);
        hdr_offset = read_32bit(entry_offset + 0x08, streamFile);
        base_offset = read_32bit(entry_offset + 0x0C, streamFile);

        hdr_id = read_16bit(hdr_offset + 0x00, streamFile);
        hdr_subid = read_16bit(hdr_offset + 0x02, streamFile);
        userdata_size = read_8bit(hdr_offset + 0x04, streamFile) & 0x0F;
        hdr_sounds = read_8bit(hdr_offset + 0x05, streamFile);
        offset_mult = (off_t)read_8bit(hdr_offset + 0x07, streamFile) * 0x0100 + 0x0100;
        
        if (target_stream > total_sounds && target_stream <= total_sounds + hdr_sounds) {
            schl_offset = base_offset + (off_t)read_16bitBE(hdr_offset + 0x0C + (0x02+userdata_size) * (target_stream-total_sounds-1), streamFile) * offset_mult;
            subsound_index = target_stream - total_sounds;

            /* There are no filenames but we can add IDs to stream name for better organization */
            if (hdr_subid != 0xFFFF) 
                snprintf(stream_name, STREAM_NAME_SIZE, "%03d_%02d_%d", hdr_id, hdr_subid, subsound_index);
            else
                snprintf(stream_name, STREAM_NAME_SIZE, "%03d_%d", hdr_id, subsound_index);
        }

        total_sounds += hdr_sounds;
    }

    if (schl_offset == 0xFFFFFFFF)
        goto fail;

    if (read_32bitBE(schl_offset, bigFile) != EA_BLOCKID_HEADER)
        goto fail;

    vgmstream = parse_schl_block(bigFile, schl_offset, total_sounds);
    if (!vgmstream)
        goto fail;

    strncpy(vgmstream->stream_name, stream_name, STREAM_NAME_SIZE);
    close_streamfile(bigFile);
    return vgmstream;

fail:
    close_streamfile(bigFile);
    return NULL;
}

/* EA SCHl with variable header - from EA games (roughly 1997~2010); generated by EA Canada's sx.exe/Sound eXchange */
static VGMSTREAM * parse_schl_block(STREAMFILE *streamFile, off_t offset, int total_streams) {
    off_t start_offset, header_offset;
    size_t header_size;
    ea_header ea = { 0 };

    if (guess_endianness32bit(offset + 0x04, streamFile)) { /* size is always LE, except in early SS/MAC */
        header_size = read_32bitBE(offset + 0x04, streamFile);
        ea.codec_config |= 0x02;
    }
    else {
        header_size = read_32bitLE(offset + 0x04, streamFile);
    }

    header_offset = offset + 0x08;

    if (!parse_variable_header(streamFile, &ea, header_offset, header_size - 0x08, 0))
        goto fail;

    start_offset = offset + header_size; /* starts in "SCCl" (skipped in block layout) or very rarely "SCDl" and maybe movie blocks */

    /* rest is common */
    return init_vgmstream_ea_variable_header(streamFile, &ea, start_offset, 0, total_streams);

fail:
    return NULL;
}

/* EA BNK with variable header - from EA games SFXs; also created by sx.exe */
static VGMSTREAM * parse_bnk_header(STREAMFILE *streamFile, off_t offset, int target_stream, int total_streams) {
    off_t header_offset, start_offset, test_offset, table_offset;
    size_t header_size;
    ea_header ea = {0};
    int32_t (*read_32bit)(off_t,STREAMFILE*) = NULL;
    int16_t (*read_16bit)(off_t,STREAMFILE*) = NULL;
    int i, bnk_version;
    int total_bnk_sounds, real_bnk_sounds = 0;

    /* check header */
    /* BNK header endianness is platform-native */
    if (read_32bitBE(offset + 0x00, streamFile) == EA_BNK_HEADER_BE) {
        read_32bit = read_32bitBE;
        read_16bit = read_16bitBE;
    }
    else if (read_32bitBE(offset + 0x00, streamFile) == EA_BNK_HEADER_LE) {
        read_32bit = read_32bitLE;
        read_16bit = read_16bitLE;
    }
    else {
        goto fail;
    }

    bnk_version = read_8bit(offset + 0x04,streamFile);
    total_bnk_sounds = read_16bit(offset + 0x06,streamFile);

    /* check multi-streams */
    switch(bnk_version) {
        case 0x02: /* early [Need For Speed II (PC/PS1), FIFA 98 (PC/PS1/SAT)] */
            table_offset = 0x0c;
            header_size = read_32bit(offset + 0x08,streamFile); /* full size */
            break;

        case 0x04: /* mid (last used in PSX banks) */
        case 0x05: /* late (generated by sx.exe ~v2+) */
            /* 0x08: header/file size, 0x0C: file size/null, 0x10: always null */
            table_offset = 0x14;
            header_size = get_streamfile_size(streamFile); /* unknown (header is variable and may have be garbage until data) */
            break;

        default:
            VGM_LOG("EA BNK: unknown version %x\n", bnk_version);
            goto fail;
    }

    if (target_stream == 0) target_stream = 1;
    header_offset = 0;

    for (i = 0; i < total_bnk_sounds; i++) {
        /* some of these are dummies with zero offset */
        test_offset = read_32bit(offset + table_offset + 0x04 * i, streamFile);

        if (test_offset != 0) {
            real_bnk_sounds++;

            /* ABK points at absolute indexes, i.e. with dummies included */
            if (total_streams != 0) {
                if (target_stream - 1 == i)
                    header_offset = offset + table_offset + 0x04 * i + test_offset;
            }
            else {
                /* Ignore dummy streams when opening standalone BNK files */
                if (target_stream == real_bnk_sounds)
                    header_offset = offset + table_offset + 0x04 * i + test_offset;
            }
        }
    }

    if (target_stream < 0 || header_offset == 0 || real_bnk_sounds < 1) goto fail;

    if (!parse_variable_header(streamFile,&ea, header_offset, header_size - header_offset, bnk_version))
        goto fail;

    /* fix absolute offsets so it works in next funcs */
    if (offset) {
        for (i = 0; i < ea.channels; i++) {
            ea.offsets[i] += offset;
        }
    }

    start_offset = ea.offsets[0]; /* first channel, presumably needed for MPEG */

    /* rest is common */
    return init_vgmstream_ea_variable_header(streamFile, &ea, start_offset, bnk_version, total_streams ? total_streams : real_bnk_sounds);

fail:
    return NULL;
}

/* inits VGMSTREAM from a EA header */
static VGMSTREAM * init_vgmstream_ea_variable_header(STREAMFILE *streamFile, ea_header * ea, off_t start_offset, int bnk_version, int total_streams) {
    VGMSTREAM * vgmstream = NULL;
    int i, ch;
    int is_bnk = bnk_version;

    /* build the VGMSTREAM */
    vgmstream = allocate_vgmstream(ea->channels, ea->loop_flag);
    if (!vgmstream) goto fail;

    vgmstream->sample_rate = ea->sample_rate;
    vgmstream->num_samples = ea->num_samples;
    vgmstream->loop_start_sample = ea->loop_start;
    vgmstream->loop_end_sample = ea->loop_end;

    vgmstream->codec_endian = ea->big_endian;
    vgmstream->codec_config = ea->codec_config;

    vgmstream->meta_type = is_bnk ? meta_EA_BNK : meta_EA_SCHL;

    if (is_bnk) {
        vgmstream->layout_type = layout_none;

        /* BNKs usually have absolute offsets for all channels ("full" interleave) except in some versions */
        if (vgmstream->channels > 1 && ea->codec1 == EA_CODEC1_PCM) {
            int interleave = (vgmstream->num_samples * (ea->bps == 8 ? 0x01 : 0x02)); /* full interleave */
            for (i = 0; i < vgmstream->channels; i++) {
                ea->offsets[i] = ea->offsets[0] + interleave*i;
            }
        }
        else if (vgmstream->channels > 1 && ea->codec1 == EA_CODEC1_VAG) {
            int interleave = (vgmstream->num_samples / 28 * 16); /* full interleave */
            for (i = 0; i < vgmstream->channels; i++) {
                ea->offsets[i] = ea->offsets[0] + interleave*i;
            }
        }
        else if (vgmstream->channels > 1 && ea->codec2 == EA_CODEC2_GCADPCM && ea->offsets[0] == ea->offsets[1]) {
            /* pcstream+gcadpcm with sx.exe v2, this is probably an bug (even with this parts of the wave are off) */
            int interleave = (vgmstream->num_samples / 14 * 8); /* full interleave */
            for (i = 0; i < vgmstream->channels; i++) {
                ea->offsets[i] = ea->offsets[0] + interleave*i;
            }
        }
    }
    else {
        vgmstream->layout_type = layout_blocked_ea_schl;
    }

    vgmstream->num_streams = total_streams;
    //vgmstream->stream_size = ; //todo needed for kbps info

    /* EA usually implements their codecs in all platforms (PS2/WII do EAXA/MT/EALAYER3) and
     * favors them over platform's natives (ex. EAXA vs VAG/DSP).
     * Unneeded codecs are removed over time (ex. LAYER3 when EALAYER3 was introduced). */
    switch (ea->codec2) {

        case EA_CODEC2_EAXA:        /* EA-XA, CDXA ADPCM variant */
            if (ea->version == EA_VERSION_V0) {
                if (ea->platform != EA_PLATFORM_SAT && ea->channels > 1)
                    vgmstream->coding_type = coding_EA_XA; /* original version, stereo stream */
                else
                    vgmstream->coding_type = coding_EA_XA_int; /* interleaved mono streams */
            }
            else { /* later revision with PCM blocks and slighty modified decoding */
                vgmstream->coding_type = coding_EA_XA_V2;
            }
            break;

        case EA_CODEC2_S8:          /* PCM8 */
            vgmstream->coding_type = coding_PCM8;
            break;

        case EA_CODEC2_S16BE:       /* PCM16BE */
            vgmstream->coding_type = coding_PCM16BE;
            break;

        case EA_CODEC2_S16LE:       /* PCM16LE */
            if (ea->version > 0) {
                vgmstream->coding_type = coding_PCM16LE;
            } else { /* Need for Speed III: Hot Pursuit (PC) */
                vgmstream->coding_type = coding_PCM16_int;
            }
            break;

        case EA_CODEC2_VAG:         /* PS-ADPCM */
            vgmstream->coding_type = coding_PSX;
            break;

        case EA_CODEC2_XBOXADPCM:   /* XBOX IMA (interleaved mono) */
            vgmstream->coding_type = coding_XBOX_IMA_int;
            break;

        case EA_CODEC2_GCADPCM:     /* DSP */
            vgmstream->coding_type = coding_NGC_DSP;

            /* get them coefs (start offsets are not necessarily ordered) */
            {
                int16_t (*read_16bit)(off_t,STREAMFILE*) = ea->big_endian ? read_16bitBE : read_16bitLE;

                for (ch=0; ch < vgmstream->channels; ch++) {
                    for (i=0; i < 16; i++) { /* actual size 0x21, last byte unknown */
                        vgmstream->ch[ch].adpcm_coef[i] = read_16bit(ea->coefs[ch] + i*2, streamFile);
                    }
                }
            }
            break;

#ifdef VGM_USE_MPEG
        case EA_CODEC2_LAYER2:      /* MPEG Layer II, aka MP2 */
        case EA_CODEC2_LAYER3: {    /* MPEG Layer III, aka MP3 */
            mpeg_custom_config cfg = {0};
            off_t mpeg_start_offset = is_bnk ?
                    start_offset :
                    get_ea_stream_mpeg_start_offset(streamFile, start_offset, ea);
            if (!mpeg_start_offset) goto fail;

            /* layout is still blocks, but should work fine with the custom mpeg decoder */
            vgmstream->codec_data = init_mpeg_custom(streamFile, mpeg_start_offset, &vgmstream->coding_type, vgmstream->channels, MPEG_EA, &cfg);
            if (!vgmstream->codec_data) goto fail;
            break;
        }

        case EA_CODEC2_EALAYER3: {  /* MP3 variant */
            mpeg_custom_config cfg = {0};
            off_t mpeg_start_offset = is_bnk ?
                    start_offset :
                    get_ea_stream_mpeg_start_offset(streamFile, start_offset, ea);
            if (!mpeg_start_offset) goto fail;

            /* layout is still blocks, but should work fine with the custom mpeg decoder */
            vgmstream->codec_data = init_mpeg_custom(streamFile, mpeg_start_offset, &vgmstream->coding_type, vgmstream->channels, MPEG_EAL31, &cfg);
            if (!vgmstream->codec_data) goto fail;
            break;
        }
#endif

        case EA_CODEC2_MT10:        /* MicroTalk (10:1 compression) */
        case EA_CODEC2_MT5: {       /* MicroTalk (5:1 compression) */
            int use_pcm_blocks = 0;

            if (ea->version == EA_VERSION_V3 || (ea->version == EA_VERSION_V2 && 
                (ea->platform == EA_PLATFORM_PC || ea->platform == EA_PLATFORM_MAC))) {
                use_pcm_blocks = 1;
            }

            vgmstream->coding_type = coding_EA_MT;
            vgmstream->codec_data = init_ea_mt(vgmstream->channels, use_pcm_blocks, ea->loop_start);
            if (!vgmstream->codec_data) goto fail;
            break;
        }

#ifdef VGM_USE_FFMPEG
        case EA_CODEC2_ATRAC3PLUS: {
            ffmpeg_codec_data *ffmpeg_data;

            /* regular ATRAC3plus chunked in SCxx blocks, including RIFF header [Medal of Honor Heroes 2 (PSP)] */
            if (!is_bnk) {
                STREAMFILE* temp_streamFile = NULL;
                /* remove blocks on reads to feed FFmpeg a clean .at3 */
                temp_streamFile = setup_schl_streamfile(streamFile, ea->codec2, ea->channels, start_offset, 0);
                if (!temp_streamFile) goto fail;

                start_offset = 0x00; /* must point to the custom streamfile's beginning */

                ffmpeg_data = init_ffmpeg_offset(temp_streamFile, start_offset, get_streamfile_size(temp_streamFile));
                close_streamfile(temp_streamFile);
                if (!ffmpeg_data) goto fail;
            }
            else {
                size_t riff_size = read_32bitLE(start_offset + 0x04, streamFile) + 0x08;
                ffmpeg_data = init_ffmpeg_offset(streamFile, start_offset, riff_size);
                if (!ffmpeg_data) goto fail;
            }

            vgmstream->codec_data = ffmpeg_data;
            vgmstream->coding_type = coding_FFmpeg;
            vgmstream->layout_type = layout_none;

            if (ffmpeg_data->skipSamples <= 0) /* in case FFmpeg didn't get them */
                ffmpeg_set_skip_samples(ffmpeg_data, riff_get_fact_skip_samples(streamFile, start_offset));
            break;
        }
#endif

        default:
            VGM_LOG("EA SCHl: unknown codec2 0x%02x for platform 0x%02x\n", ea->codec2, ea->platform);
            goto fail;
    }

    /* open files; channel offsets are updated below */
    if (!vgmstream_open_stream(vgmstream,streamFile,start_offset))
        goto fail;


    if (is_bnk) {
        /* setup channel offsets */
        if (vgmstream->coding_type == coding_EA_XA) { /* shared */
            for (i = 0; i < vgmstream->channels; i++) {
                vgmstream->ch[i].offset = ea->offsets[0];
            }
        //} else if (vgmstream->layout_type == layout_interleave) { /* interleaved */
        //    for (i = 0; i < vgmstream->channels; i++) {
        //        vgmstream->ch[i].offset = ea->offsets[0] + vgmstream->interleave_block_size*i;
        //    }
        } else { /* absolute */
            for (i = 0; i < vgmstream->channels; i++) {
                vgmstream->ch[i].offset = ea->offsets[i];
            }
        }
    }
    else if (vgmstream->layout_type == layout_blocked_ea_schl) {
        /* regular SCHls, except ATRAC3plus */
        if (total_streams == 0) {
            /* HACK: fix num_samples for streams with multiple SCHl. Need to eventually get rid of this */
            int total_samples = get_ea_stream_total_samples(streamFile, start_offset, vgmstream);
            if (total_samples > vgmstream->num_samples)
                vgmstream->num_samples = total_samples;
        }

        /* setup first block to update offsets */
        block_update_ea_schl(start_offset,vgmstream);
    }

    return vgmstream;

fail:
    close_vgmstream(vgmstream);
    return NULL;
}


static uint32_t read_patch(STREAMFILE* streamFile, off_t* offset) {
    uint32_t result = 0;
    uint8_t byte_count = read_8bit(*offset, streamFile);
    (*offset)++;

    if (byte_count == 0xFF) { /* signals 32b size (ex. custom user data) */
        (*offset) += 4 + read_32bitBE(*offset, streamFile);
        return 0;
    }

    if (byte_count > 4) { /* uncommon (ex. coef patches) */
        (*offset) += byte_count;
        return 0;
    }

    for ( ; byte_count > 0; byte_count--) { /* count of 0 is also possible, means value 0 */
        result <<= 8;
        result += (uint8_t)read_8bit(*offset, streamFile);
        (*offset)++;
    }

    return result;
}

/* decodes EA's GSTR/PT header (mostly cross-referenced with sx.exe) */
static int parse_variable_header(STREAMFILE* streamFile, ea_header* ea, off_t begin_offset, int max_length, int bnk_version) {
    off_t offset = begin_offset;
    uint32_t platform_id;
    int is_header_end = 0;
    int is_bnk = bnk_version;

    /* null defaults as 0 can be valid */
    ea->version = EA_VERSION_NONE;
    ea->codec1 = EA_CODEC1_NONE;
    ea->codec2 = EA_CODEC2_NONE;

    /* get platform info */
    platform_id = read_32bitBE(offset, streamFile);
    if (platform_id != 0x47535452 && (platform_id & 0xFFFF0000) != 0x50540000) {
        offset += 4; /* skip unknown field (related to blocks/size?) in "nbapsstream" (NBA2000 PS, FIFA2001 PS) */
        platform_id = read_32bitBE(offset, streamFile);
    }
    if (platform_id == 0x47535452) { /* "GSTR" = Generic STReam */
        ea->platform = EA_PLATFORM_GENERIC;
        offset += 4 + 4; /* GSTRs have an extra field (config?): ex. 0x01000000, 0x010000D8 BE */
    }
    else if ((platform_id & 0xFFFF0000) == 0x50540000) { /* "PT" = PlaTform */
        ea->platform = (uint16_t)read_16bitLE(offset + 2,streamFile);
        offset += 4;
    }
    else {
        goto fail;
    }


    /* parse mini-chunks/tags (variable, ommited if default exists; some are removed in later versions of sx.exe) */
    while (!is_header_end && offset - begin_offset < max_length) {
        uint8_t patch_type = read_8bit(offset,streamFile);
        offset++;

        switch(patch_type) {
            case 0x00: /* signals non-default block rate and maybe other stuff; or padding after 0xFF */
                if (!is_header_end)
                    read_patch(streamFile, &offset);
                break;

            case 0x05: /* unknown (usually 0x50 except Madden NFL 3DS: 0x3e800) */
            case 0x06: /* priority (0..100, always 0x65 for streams, others for BNKs; rarely ommited) */
            case 0x07: /* unknown (BNK only: 36|3A) */
            case 0x08: /* release envelope (BNK only) */
            case 0x09: /* related to playback envelope (BNK only) */
            case 0x0A: /* bend range (BNK only) */
            case 0x0B: /* unknown (always 0x02) */
            case 0x0C: /* pan offset (BNK only) */
            case 0x0D: /* random pan offset range (BNK only) */
            case 0x0E: /* volume (BNK only) */
            case 0x0F: /* random volume range (BNK only) */
            case 0x10: /* detune (BNK only) */
            case 0x11: /* random detune range (BNK only) */
            case 0x12: /* unknown, rare (BNK only) [Need for Speed III: Hot Pursuit (PS1)] */
            case 0x13: /* effect bus (0..127) */
            case 0x14: /* emdedded user data (free size/value) */
            case 0x15: /* unknown, rare (BNK only) [Need for Speed: High Stakes (PS1)] */
            case 0x19: /* related to playback envelope (BNK only) */
            case 0x1A: /* unknown and very rare (BNK only) [SSX 3 (PS2)] */
            case 0x1B: /* unknown (movie only?) */
            case 0x1C: /* initial envelope volume (BNK only) */
            case 0x1D: /* unknown, rare [NASCAR 06 (Xbox)] */
            case 0x1E:
            case 0x1F:
            case 0x20:
            case 0x21:
            case 0x22:
            case 0x23:
            case 0x24: /* master random detune range (BNK only) */
            case 0x25: /* unknown */
            case 0x26: /* unknown, rare [FIFA 07 (Xbox)] */
                read_patch(streamFile, &offset);
                break;

            case 0xFC: /* padding for alignment between patches */
            case 0xFE: /* padding? (actually exists?) */
            case 0xFD: /* info section start marker */
                break;

            case 0x83: /* codec1 defines, used early revisions */
                ea->codec1 = read_patch(streamFile, &offset);
                break;
            case 0xA0: /* codec2 defines */
                ea->codec2 = read_patch(streamFile, &offset);
                break;

            case 0x80: /* version, affecting some codecs */
                ea->version = read_patch(streamFile, &offset);
                break;
            case 0x81: /* bits per sample for codec1 PCM */
                ea->bps = read_patch(streamFile, &offset);
                break;

            case 0x82: /* channel count */
                ea->channels = read_patch(streamFile, &offset);
                break;
            case 0x84: /* sample rate */
                ea->sample_rate = read_patch(streamFile,&offset);
                break;

            case 0x85: /* sample count */
                ea->num_samples = read_patch(streamFile, &offset);
                break;
            case 0x86: /* loop start sample */
                ea->loop_start = read_patch(streamFile, &offset);
                break;
            case 0x87: /* loop end sample */
                ea->loop_end = read_patch(streamFile, &offset);
                break;

            /* channel offsets (BNK only), can be the equal for all channels or interleaved; not necessarily contiguous */
            case 0x88: /* absolute offset of ch1 (or ch1+ch2 for stereo EAXA) */
                ea->offsets[0] = read_patch(streamFile, &offset);
                break;
            case 0x89: /* absolute offset of ch2 */
                ea->offsets[1] = read_patch(streamFile, &offset);
                break;
            case 0x94: /* absolute offset of ch3 */
                ea->offsets[2] = read_patch(streamFile, &offset);
                break;
            case 0x95: /* absolute offset of ch4 */
                ea->offsets[3] = read_patch(streamFile, &offset);
                break;
            case 0xA2: /* absolute offset of ch5 */
                ea->offsets[4] = read_patch(streamFile, &offset);
                break;
            case 0xA3: /* absolute offset of ch6 */
                ea->offsets[5] = read_patch(streamFile, &offset);
                break;

            case 0x8F: /* DSP/N64BLK coefs ch1 */
                ea->coefs[0] = offset+1;
                read_patch(streamFile, &offset);
                break;
            case 0x90: /* DSP/N64BLK coefs ch2 */
                ea->coefs[1] = offset+1;
                read_patch(streamFile, &offset);
                break;
            case 0x91: /* DSP coefs ch3, and unknown in older versions */
                ea->coefs[2] = offset+1;
                read_patch(streamFile, &offset);
                break;
            case 0xAB: /* DSP coefs ch4 */
                ea->coefs[3] = offset+1;
                read_patch(streamFile, &offset);
                break;
            case 0xAC: /* DSP coefs ch5 */
                ea->coefs[4] = offset+1;
                read_patch(streamFile, &offset);
                break;
            case 0xAD: /* DSP coefs ch6 */
                ea->coefs[5] = offset+1;
                read_patch(streamFile, &offset);
                break;

            case 0x8A: /* long padding (always 0x00000000) */
            case 0x8B: /* also padding? [Need for Speed: Hot Pursuit 2 (PC)] */
            case 0x8C: /* flags (ex. play type = 01=static/02=dynamic | spatialize = 20=pan/etc) */
                       /* (ex. PS1 VAG=0, PS2 PCM/LAYER2=4, GC EAXA=4, 3DS DSP=512, Xbox EAXA=36, N64 BLK=05E800, N64 MT10=01588805E800) */
            case 0x8D: /* unknown, rare [FIFA 07 (GC)] */
            case 0x8E:
            case 0x92: /* bytes per sample? */
            case 0x93: /* unknown (BNK only) [Need for Speed III: Hot Pursuit (PC)] */
            case 0x98: /* embedded time stretch 1 (long data for who-knows-what) */
            case 0x99: /* embedded time stretch 2 */
            case 0x9C: /* azimuth ch1 */
            case 0x9D: /* azimuth ch2 */
            case 0x9E: /* azimuth ch3 */
            case 0x9F: /* azimuth ch4 */
            case 0xA6: /* azimuth ch5 */
            case 0xA7: /* azimuth ch6 */
            case 0xA1: /* unknown and very rare, always 0x02 [FIFA 2001 (PS2)] */
                read_patch(streamFile, &offset);
                break;

            case 0xFF: /* header end (then 0-padded so it's 32b aligned) */
                is_header_end = 1;
                break;

            default:
                VGM_LOG("EA SCHl: unknown patch 0x%02x at 0x%04lx\n", patch_type, (offset-1));
                goto fail;
        }
    }

    if (ea->channels > EA_MAX_CHANNELS)
        goto fail;


    /* Set defaults per platform, as the header ommits them when possible */

    ea->loop_flag = (ea->loop_end);

    /* affects blocks/codecs */
    if (ea->platform == EA_PLATFORM_N64
        || ea->platform == EA_PLATFORM_MAC
        || ea->platform == EA_PLATFORM_SAT
        || ea->platform == EA_PLATFORM_GC_WII
        || ea->platform == EA_PLATFORM_X360
        || ea->platform == EA_PLATFORM_PS3
        || ea->platform == EA_PLATFORM_GENERIC) {
        ea->big_endian = 1;
    }

    if (!ea->channels) {
        ea->channels = 1;
    }

    /* version mainly affects defaults and minor stuff, can come with all codecs */
    /* V0 is often just null but it's specified in some files (uncommon, with patch size 0x00) */
    if (ea->version == EA_VERSION_NONE) {
        switch(ea->platform) {
            case EA_PLATFORM_PC:        ea->version = EA_VERSION_V0; break;
            case EA_PLATFORM_PSX:       ea->version = EA_VERSION_V0; break; // assumed
            case EA_PLATFORM_N64:       ea->version = EA_VERSION_V0; break;
            case EA_PLATFORM_MAC:       ea->version = EA_VERSION_V0; break;
            case EA_PLATFORM_SAT:       ea->version = EA_VERSION_V0; break;
            case EA_PLATFORM_PS2:       ea->version = EA_VERSION_V1; break;
            case EA_PLATFORM_GC_WII:    ea->version = EA_VERSION_V2; break;
            case EA_PLATFORM_XBOX:      ea->version = EA_VERSION_V2; break;
            case EA_PLATFORM_X360:      ea->version = EA_VERSION_V3; break;
            case EA_PLATFORM_PSP:       ea->version = EA_VERSION_V3; break;
            case EA_PLATFORM_PS3:       ea->version = EA_VERSION_V3; break;
            case EA_PLATFORM_3DS:       ea->version = EA_VERSION_V3; break;
            case EA_PLATFORM_GENERIC:   ea->version = EA_VERSION_V2; break;
            default:
                VGM_LOG("EA SCHl: unknown default version for platform 0x%02x\n", ea->platform);
                goto fail;
        }
    }

    /* codec1 defaults */
    if (ea->codec1 == EA_CODEC1_NONE && ea->version == EA_VERSION_V0) {
        switch(ea->platform) {
            case EA_PLATFORM_PC:        ea->codec1 = EA_CODEC1_PCM; break;
            case EA_PLATFORM_PSX:       ea->codec1 = EA_CODEC1_VAG; break; // assumed
            //case EA_PLATFORM_N64:     ea->codec1 = EA_CODEC1_N64; break;
            case EA_PLATFORM_MAC:       ea->codec1 = EA_CODEC1_PCM; break; // assumed
            case EA_PLATFORM_SAT:       ea->codec1 = EA_CODEC1_PCM; break;
            default:
                VGM_LOG("EA SCHl: unknown default codec1 for platform 0x%02x\n", ea->platform);
                goto fail;
        }
    }

    /* codec1 to codec2 to simplify later parsing */
    if (ea->codec1 != EA_CODEC1_NONE && ea->codec2 == EA_CODEC2_NONE) {
        switch (ea->codec1) {
            case EA_CODEC1_PCM:
                ea->codec2 = ea->bps==8 ? EA_CODEC2_S8 : (ea->big_endian ? EA_CODEC2_S16BE : EA_CODEC2_S16LE);
                break;
            case EA_CODEC1_VAG:         ea->codec2 = EA_CODEC2_VAG; break;
            case EA_CODEC1_EAXA:        ea->codec2 = EA_CODEC2_EAXA; break;
            case EA_CODEC1_MT10:        ea->codec2 = EA_CODEC2_MT10; break;
            default:
                VGM_LOG("EA SCHl: unknown codec1 0x%02x\n", ea->codec1);
                goto fail;
        }
    }

    /* codec2 defaults */
    if (ea->codec2 == EA_CODEC2_NONE) {
        switch(ea->platform) {
            case EA_PLATFORM_GENERIC:   ea->codec2 = EA_CODEC2_EAXA; break;
            case EA_PLATFORM_PC:        ea->codec2 = EA_CODEC2_EAXA; break;
            case EA_PLATFORM_PSX:       ea->codec2 = EA_CODEC2_VAG; break;
            case EA_PLATFORM_MAC:       ea->codec2 = EA_CODEC2_EAXA; break;
            case EA_PLATFORM_PS2:       ea->codec2 = EA_CODEC2_VAG; break;
            case EA_PLATFORM_GC_WII:    ea->codec2 = EA_CODEC2_S16BE; break;
            case EA_PLATFORM_XBOX:      ea->codec2 = EA_CODEC2_S16LE; break;
            case EA_PLATFORM_X360:      ea->codec2 = EA_CODEC2_EAXA; break;
            case EA_PLATFORM_PSP:       ea->codec2 = EA_CODEC2_EAXA; break;
            case EA_PLATFORM_PS3:       ea->codec2 = EA_CODEC2_EAXA; break;
            case EA_PLATFORM_3DS:       ea->codec2 = EA_CODEC2_GCADPCM; break;
            default:
                VGM_LOG("EA SCHl: unknown default codec2 for platform 0x%02x\n", ea->platform);
                goto fail;
        }
    }

    /* somehow doesn't follow machine's sample rate or anything sensical */
    if (!ea->sample_rate) {
        switch(ea->platform) {
            case EA_PLATFORM_GENERIC:   ea->sample_rate = 48000; break;
            case EA_PLATFORM_PC:        ea->sample_rate = 22050; break;
            case EA_PLATFORM_PSX:       ea->sample_rate = 22050; break;
            case EA_PLATFORM_N64:       ea->sample_rate = 22050; break;
            case EA_PLATFORM_MAC:       ea->sample_rate = 22050; break;
            case EA_PLATFORM_SAT:       ea->sample_rate = 22050; break;
            case EA_PLATFORM_PS2:       ea->sample_rate = 22050; break;
            case EA_PLATFORM_GC_WII:    ea->sample_rate = 24000; break;
            case EA_PLATFORM_XBOX:      ea->sample_rate = 24000; break;
            case EA_PLATFORM_X360:      ea->sample_rate = 44100; break;
            case EA_PLATFORM_PSP:       ea->sample_rate = 22050; break;
            case EA_PLATFORM_PS3:       ea->sample_rate = 44100; break;
            case EA_PLATFORM_3DS:       ea->sample_rate = 32000; break;
            default:
                VGM_LOG("EA SCHl: unknown default sample rate for platform 0x%02x\n", ea->platform);
                goto fail;
        }
    }

    /* some codecs have ADPCM hist at the start of every block in streams (but not BNKs) */
    if (!is_bnk) {
        if (ea->codec2 == EA_CODEC2_GCADPCM) {
            if (ea->platform == EA_PLATFORM_3DS)
                ea->codec_config |= 0x01;
        }
        else if (ea->codec2 == EA_CODEC2_EAXA) {
            /* EA-XA has ADPCM hist in earlier versions */
            /* V0, V1: always */
            /* V2: consoles only */
            /* V3: never */
            if (ea->version <= EA_VERSION_V1) {
                ea->codec_config |= 0x01;
            }
            else if (ea->version == EA_VERSION_V2) {
                if (ea->platform == EA_PLATFORM_PS2 || ea->platform == EA_PLATFORM_GC_WII || ea->platform == EA_PLATFORM_XBOX)
                    ea->codec_config |= 0x01;
            }
        }
    }

    return offset;

fail:
    return 0;
}

/* Get total samples by parsing block headers, needed when multiple files are stitched together.
 * Some EA files (.mus/eam/sng/etc) concat many small subfiles, used for interactive/mapped
 * music (.map/lin). Subfiles always share header, except num_samples. */
static int get_ea_stream_total_samples(STREAMFILE* streamFile, off_t start_offset, VGMSTREAM* vgmstream) {
    int num_samples = 0;
    int new_schl = 0;

    /* calc num_samples as playable data size varies between files/blocks */
    {
        vgmstream->next_block_offset = start_offset;
        do {
            uint32_t block_id = read_32bitBE(vgmstream->next_block_offset+0x00,streamFile);
            if (block_id == EA_BLOCKID_HEADER) /* "SCHl" start block (movie "SHxx" shouldn't use multi files) */
                new_schl = 1;

            block_update_ea_schl(vgmstream->next_block_offset,vgmstream);
            num_samples += vgmstream->current_block_samples;
        }
        while (vgmstream->next_block_offset < get_streamfile_size(streamFile));
    }

    /* only use calculated samples with multiple subfiles (rarely header samples may be less due to padding) */
    if (new_schl) {
        ;VGM_LOG("EA SCHl: multiple SCHl found\n");
        return num_samples;
    }
    else {
        return 0;
    }
}

/* find data start offset inside the first SCDl; not very elegant but oh well */
static off_t get_ea_stream_mpeg_start_offset(STREAMFILE* streamFile, off_t start_offset, const ea_header* ea) {
    size_t file_size = get_streamfile_size(streamFile);
    off_t block_offset = start_offset;
    int32_t (*read_32bit)(off_t,STREAMFILE*) = ea->big_endian ? read_32bitBE : read_32bitLE;

    while (block_offset < file_size) {
        uint32_t block_id, block_size;
        off_t offset;

        block_id = read_32bitBE(block_offset+0x00,streamFile);

        block_size = read_32bitLE(block_offset+0x04,streamFile);
        if (block_size > 0x00F00000) /* size is always LE, except in early SAT/MAC */
            block_size = read_32bitBE(block_offset+0x04,streamFile);

        switch(block_id) {
            case EA_BLOCKID_DATA: /* "SCDl" */
            case EA_BLOCKID_LOC_DATA | EA_BLOCKID_LOC_EN: /* "SDEN" */
            case EA_BLOCKID_LOC_DATA | EA_BLOCKID_LOC_FR: /* "SDFR" */
            case EA_BLOCKID_LOC_DATA | EA_BLOCKID_LOC_GE: /* "SDGE" */
            case EA_BLOCKID_LOC_DATA | EA_BLOCKID_LOC_IT: /* "SDIT" */
            case EA_BLOCKID_LOC_DATA | EA_BLOCKID_LOC_SP: /* "SDSP" */
            case EA_BLOCKID_LOC_DATA | EA_BLOCKID_LOC_RU: /* "SDRU" */
            case EA_BLOCKID_LOC_DATA | EA_BLOCKID_LOC_JA: /* "SDJA" */
                offset = read_32bit(block_offset+0x0c,streamFile); /* first value seems ok, second is something else in EALayer3 */
                return block_offset + 0x0c + ea->channels*0x04 + offset;
            case 0x00000000:
                goto fail; /* just in case */
            default:
                block_offset += block_size; /* size includes header */
                break;
        }
    }

fail:
    return 0;
}