mirror of
https://github.com/vgmstream/vgmstream.git
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156 lines
4.1 KiB
C
156 lines
4.1 KiB
C
#include "meta.h"
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#include "../layout/layout.h"
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#include "../coding/coding.h"
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/* Possibly the same as EA_CODEC_x in variable SCHl */
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#define EA_CODEC_PCM 0x00
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#define EA_CODEC_IMA 0x02
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#define EA_CODEC_PSX 0x06
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typedef struct {
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int8_t version;
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int8_t bps;
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int8_t channels;
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int8_t codec;
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int sample_rate;
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int32_t num_samples;
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int big_endian;
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int loop_flag;
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} ea_fixed_header;
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static int parse_fixed_header(STREAMFILE* sf, ea_fixed_header* ea);
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/* EA SCHl with fixed header - from EA games (~1997?) */
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VGMSTREAM* init_vgmstream_ea_schl_fixed(STREAMFILE* sf) {
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VGMSTREAM* vgmstream = NULL;
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off_t start_offset;
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size_t header_size;
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ea_fixed_header ea = {0};
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/* checks */
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if (!is_id32be(0x00,sf, "SCHl"))
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goto fail;
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/* .asf: original [NHK 97 (PC)]
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* .lasf: fake for plugins
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* .cnk: ps1 [NBA Live 97 (PS1)] */
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if (!check_extensions(sf,"asf,lasf,cnk"))
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goto fail;
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/* see ea_schl.c for more info about blocks */
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//TODO: handle SCCl? [NBA Live 97 (PS1)]
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header_size = read_u32le(0x04,sf);
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if (!parse_fixed_header(sf, &ea))
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goto fail;
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start_offset = header_size;
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/* build the VGMSTREAM */
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vgmstream = allocate_vgmstream(ea.channels, ea.loop_flag);
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if (!vgmstream) goto fail;
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vgmstream->sample_rate = ea.sample_rate;
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vgmstream->num_samples = ea.num_samples;
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//vgmstream->loop_start_sample = ea.loop_start;
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//vgmstream->loop_end_sample = ea.loop_end;
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vgmstream->codec_endian = ea.big_endian;
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vgmstream->meta_type = meta_EA_SCHL_fixed;
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vgmstream->layout_type = layout_blocked_ea_schl;
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switch (ea.codec) {
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case EA_CODEC_PCM:
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vgmstream->coding_type = ea.bps==8 ? coding_PCM8 : (ea.big_endian ? coding_PCM16BE : coding_PCM16LE);
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break;
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case EA_CODEC_IMA:
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vgmstream->coding_type = coding_DVI_IMA; /* stereo/mono, high nibble first */
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break;
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case EA_CODEC_PSX:
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vgmstream->coding_type = coding_PSX;
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break;
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default:
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VGM_LOG("EA: unknown codec 0x%02x\n", ea.codec);
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goto fail;
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}
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if (!vgmstream_open_stream(vgmstream, sf, start_offset))
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goto fail;
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return vgmstream;
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fail:
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close_vgmstream(vgmstream);
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return NULL;
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}
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static int parse_fixed_header(STREAMFILE* sf, ea_fixed_header* ea) {
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uint32_t offset = 0x00, size = 0;
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if (is_id32be(offset+0x08, sf, "PATl"))
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offset = 0x08;
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else if (is_id32be(offset+0x0c, sf, "PATl"))
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offset = 0x0c; /* extra field in PS1 */
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else
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goto fail;
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size = read_u32le(offset+0x34, sf);
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if (size == 0x20 && is_id32be(offset+0x38, sf, "TMpl")) { /* PC LE? */
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offset += 0x3c;
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ea->version = read_u8 (offset+0x00, sf);
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ea->bps = read_u8 (offset+0x01, sf);
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ea->channels = read_u8 (offset+0x02, sf);
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ea->codec = read_u8 (offset+0x03, sf);
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/* 0x04: 0? */
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ea->sample_rate = read_u16le(offset+0x06, sf);
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ea->num_samples = read_s32le(offset+0x08, sf);
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/* 0x0c: -1? loop_start? */
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/* 0x10: -1? loop_end? */
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/* 0x14: 0? data start? */
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/* 0x18: -1? */
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/* 0x1c: volume? (always 128) */
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}
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else if (size == 0x38 && is_id32be(offset+0x38, sf, "TMxl")) { /* PSX LE? */
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offset += 0x3c;
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ea->version = read_u8 (offset+0x00, sf);
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ea->bps = read_u8 (offset+0x01, sf);
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ea->channels = read_u8 (offset+0x02, sf);
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ea->codec = read_u8 (offset+0x03, sf);
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/* 0x04: 0? */
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ea->sample_rate = read_u16le(offset+0x06, sf);
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/* 0x08: 0x20C? */
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ea->num_samples = read_s32le(offset+0x0c, sf);
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/* 0x10: -1? loop_start? */
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/* 0x14: -1? loop_end? */
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/* 0x18: 0x20C? */
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/* 0x1c: 0? */
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/* 0x20: 0? */
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/* 0x24: 0? */
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/* 0x28: -1? */
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/* 0x2c: -1? */
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/* 0x30: -1? */
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/* 0x34: volume? (always 128) */
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}
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else {
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goto fail;
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}
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//ea->loop_flag = (ea->loop_end_sample);
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return 1;
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fail:
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return 0;
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}
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