mirror of
https://github.com/vgmstream/vgmstream.git
synced 2024-12-24 04:14:50 +01:00
127 lines
3.1 KiB
C
127 lines
3.1 KiB
C
#include "meta.h"
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#include "../coding/coding.h"
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static VGMSTREAM* init_vgmstream_ikm_ps2(STREAMFILE* sf) {
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VGMSTREAM* v = NULL;
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off_t start_offset;
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int loop_flag, channels;
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if (!is_id32be(0x40,sf, "AST\0"))
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goto fail;
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loop_flag = (read_s32le(0x14, sf) > 0);
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channels = read_s32le(0x50, sf);
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start_offset = 0x800;
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/* build the VGMSTREAM */
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v = allocate_vgmstream(channels, loop_flag);
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if (!v) goto fail;
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v->meta_type = meta_IKM;
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v->sample_rate = read_s32le(0x44, sf);
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v->num_samples = ps_bytes_to_samples(read_s32le(0x4c, sf), channels);
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v->loop_start_sample = read_s32le(0x14, sf);
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v->loop_end_sample = read_s32le(0x18, sf);
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v->coding_type = coding_PSX;
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v->layout_type = layout_interleave;
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v->interleave_block_size = 0x10; /* @0x40 / channels */
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if (!vgmstream_open_stream(v, sf, start_offset))
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goto fail;
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return v;
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fail:
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close_vgmstream(v);
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return NULL;
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}
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static VGMSTREAM* init_vgmstream_ikm_pc(STREAMFILE* sf) {
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VGMSTREAM* v = NULL;
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off_t start_offset;
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/* find "OggS" start */
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if (is_id32be(0x30,sf, "OggS"))
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start_offset = 0x30; /* Chaos Legion (PC) */
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else
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start_offset = 0x800; /* Legend of Galactic Heroes (PC) */
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{
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ogg_vorbis_meta_info_t ovmi = {0};
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ovmi.meta_type = meta_IKM;
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ovmi.loop_start = read_s32le(0x14, sf);
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ovmi.loop_end = read_s32le(0x18, sf);
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ovmi.loop_end_found = ovmi.loop_end;
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ovmi.loop_flag = ovmi.loop_end > 0;
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ovmi.stream_size = read_s32le(0x24, sf);
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v = init_vgmstream_ogg_vorbis_config(sf, start_offset, &ovmi);
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if (!v) goto fail;
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}
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return v;
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fail:
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close_vgmstream(v);
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return NULL;
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}
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static VGMSTREAM* init_vgmstream_ikm_psp(STREAMFILE* sf) {
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VGMSTREAM* v = NULL;
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STREAMFILE* temp_sf = NULL;
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off_t start_offset;
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size_t data_size;
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if (!is_id32be(0x800,sf, "RIFF"))
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goto fail;
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/* loop values (pre-adjusted without encoder delay) at 0x14/18 are found in the RIFF too */
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data_size = read_s32le(0x24, sf);
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start_offset = 0x800;
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temp_sf = setup_subfile_streamfile(sf, start_offset, data_size, "at3");
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if (!temp_sf) goto fail;
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v = init_vgmstream_riff(temp_sf);
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if (!v) goto fail;
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v->meta_type = meta_IKM;
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close_streamfile(temp_sf);
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return v;
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fail:
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close_streamfile(temp_sf);
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close_vgmstream(v);
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return NULL;
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}
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/* IKM - MiCROViSiON container */
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VGMSTREAM* init_vgmstream_ikm(STREAMFILE* sf) {
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uint32_t type;
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/* checks */
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if (!is_id32be(0x00,sf, "IKM\0"))
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goto fail;
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if (!check_extensions(sf,"ikm"))
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goto fail;
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type = read_u32le(0x20, sf);
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switch(type) {
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case 0x00: /* The Legend of Heroes: A Tear of Vermillion (PSP) */
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return init_vgmstream_ikm_psp(sf);
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case 0x01: /* Chaos Legion (PC), Legend of Galactic Heroes (PC) */
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return init_vgmstream_ikm_pc(sf);
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case 0x03: /* Zwei (PS2) */
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return init_vgmstream_ikm_ps2(sf);
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default:
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goto fail;
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}
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fail:
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return NULL;
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}
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