mirror of
https://github.com/vgmstream/vgmstream.git
synced 2024-12-19 09:55:53 +01:00
116 lines
3.9 KiB
C
116 lines
3.9 KiB
C
#include "meta.h"
|
|
#include "../coding/coding.h"
|
|
|
|
/* .IMC - from iNiS Gitaroo Man (PS2) */
|
|
VGMSTREAM * init_vgmstream_imc(STREAMFILE *streamFile) {
|
|
VGMSTREAM * vgmstream = NULL;
|
|
off_t start_offset;
|
|
int loop_flag, channel_count, sample_rate, interleave, blocks;
|
|
size_t file_size, data_size;
|
|
|
|
|
|
/* checks */
|
|
/* .imc: extension from the main container */
|
|
if (!check_extensions(streamFile, "imc"))
|
|
goto fail;
|
|
|
|
channel_count = read_32bitLE(0x00, streamFile);
|
|
sample_rate = read_32bitLE(0x04, streamFile);
|
|
interleave = read_32bitLE(0x08, streamFile) * 0x10; /* number of frames in a block */
|
|
blocks = read_32bitLE(0x0c, streamFile); /* number of interleave blocks (even in mono) */
|
|
|
|
file_size = get_streamfile_size(streamFile);
|
|
loop_flag = 0;
|
|
start_offset = 0x10;
|
|
|
|
/* extra checks since the header is so simple */
|
|
if (channel_count < 1 || channel_count > 8)
|
|
goto fail;
|
|
if (sample_rate < 11025 || sample_rate > 48000)
|
|
/* game can play 11025, 16000, 22050, 32000, 44100, 48000. Anything else will be
|
|
silent in-game. ST10.IMC subsongs 42-47 use 22000, those are unused silent audio */
|
|
goto fail;
|
|
if (interleave*blocks + start_offset != file_size)
|
|
goto fail;
|
|
|
|
data_size = file_size - start_offset;
|
|
data_size -= ps_find_padding(streamFile, start_offset, data_size, channel_count, interleave, 0);
|
|
|
|
|
|
/* build the VGMSTREAM */
|
|
vgmstream = allocate_vgmstream(channel_count, loop_flag);
|
|
if (!vgmstream) goto fail;
|
|
|
|
vgmstream->meta_type = meta_IMC;
|
|
vgmstream->sample_rate = sample_rate;
|
|
vgmstream->num_samples = ps_bytes_to_samples(data_size, channel_count);
|
|
vgmstream->coding_type = coding_PSX;
|
|
vgmstream->layout_type = layout_interleave;
|
|
vgmstream->interleave_block_size = interleave;
|
|
|
|
if (!vgmstream_open_stream(vgmstream,streamFile,start_offset))
|
|
goto fail;
|
|
return vgmstream;
|
|
|
|
fail:
|
|
close_vgmstream(vgmstream);
|
|
return NULL;
|
|
}
|
|
|
|
/* ****************************************************************************** */
|
|
|
|
/* .IMC in containers */
|
|
VGMSTREAM * init_vgmstream_imc_container(STREAMFILE *streamFile) {
|
|
VGMSTREAM *vgmstream = NULL;
|
|
STREAMFILE *temp_streamFile = NULL;
|
|
off_t header_offset, subfile_offset, next_offset, name_offset;
|
|
size_t subfile_size;
|
|
int total_subsongs, target_subsong = streamFile->stream_index;
|
|
|
|
|
|
/* checks */
|
|
if (!check_extensions(streamFile, "imc"))
|
|
goto fail;
|
|
|
|
total_subsongs = read_32bitLE(0x00, streamFile);
|
|
if (target_subsong == 0) target_subsong = 1;
|
|
if (target_subsong < 0 || target_subsong > total_subsongs || total_subsongs < 1) goto fail;
|
|
|
|
|
|
header_offset = 0x04 + 0x20*(target_subsong-1);
|
|
|
|
name_offset = header_offset + 0x00;
|
|
/* 0x08: flags? (0x702ADE77|0x002ADE77|0x20000000|etc) */
|
|
/* 0x0c: same for all songs in single .imc but varies between .imc */
|
|
subfile_offset = read_32bitLE(header_offset + 0x10,streamFile);
|
|
/* 0x14: flags/size? (0xF0950000|0x3CFA1200|etc) */
|
|
/* 0x18: same for all songs in single .imc but varies between .imc */
|
|
/* 0x1c: flags? (0 or 2) */
|
|
|
|
if (target_subsong == total_subsongs) {
|
|
next_offset = get_streamfile_size(streamFile);
|
|
}
|
|
else {
|
|
next_offset = read_32bitLE(header_offset + 0x20 + 0x10,streamFile);
|
|
}
|
|
subfile_size = next_offset - subfile_offset;
|
|
|
|
|
|
temp_streamFile = setup_subfile_streamfile(streamFile, subfile_offset,subfile_size, NULL);
|
|
if (!temp_streamFile) goto fail;
|
|
|
|
vgmstream = init_vgmstream_imc(temp_streamFile);
|
|
if (!vgmstream) goto fail;
|
|
|
|
close_streamfile(temp_streamFile);
|
|
vgmstream->num_streams = total_subsongs;
|
|
read_string(vgmstream->stream_name,0x08+1, name_offset,streamFile);
|
|
|
|
return vgmstream;
|
|
|
|
fail:
|
|
close_streamfile(temp_streamFile);
|
|
close_vgmstream(vgmstream);
|
|
return NULL;
|
|
}
|