mirror of
https://github.com/vgmstream/vgmstream.git
synced 2024-12-22 03:15:54 +01:00
75 lines
2.4 KiB
C
75 lines
2.4 KiB
C
#include "meta.h"
|
|
#include "../util.h"
|
|
#include "../coding/coding.h"
|
|
|
|
static int get_sk_num_samples(STREAMFILE *streamFile, off_t start_offset);
|
|
|
|
/* AUD/SK - Silicon Knights obfuscated Ogg (cutscene/voices) [Eternal Darkness (GC)] */
|
|
VGMSTREAM * init_vgmstream_sk_aud(STREAMFILE *streamFile) {
|
|
VGMSTREAM * vgmstream = NULL;
|
|
off_t start_offset;
|
|
int loop_flag = 0, channel_count, sample_rate;
|
|
|
|
/* check extension, case insensitive */
|
|
if (!check_extensions(streamFile,"aud"))
|
|
goto fail;
|
|
|
|
if (read_32bitBE(0x00,streamFile) != 0x11534B10) /* \11"SK"\10 */
|
|
goto fail;
|
|
|
|
/* the format is just mutant Ogg so actually peeking into the Vorbis id packet here */
|
|
channel_count = read_8bit (0x23,streamFile);
|
|
sample_rate = read_32bitLE(0x24,streamFile);
|
|
|
|
|
|
/* build the VGMSTREAM */
|
|
vgmstream = allocate_vgmstream(channel_count,loop_flag);
|
|
if (!vgmstream) goto fail;
|
|
|
|
vgmstream->sample_rate = sample_rate;
|
|
vgmstream->num_samples = get_sk_num_samples(streamFile, 0);
|
|
vgmstream->meta_type = meta_SK_AUD;
|
|
|
|
#ifdef VGM_USE_VORBIS
|
|
{
|
|
vorbis_custom_config cfg = {0};
|
|
|
|
vgmstream->layout_type = layout_none;
|
|
vgmstream->coding_type = coding_VORBIS_custom;
|
|
vgmstream->codec_data = init_vorbis_custom(streamFile, 0x00, VORBIS_SK, &cfg);
|
|
if (!vgmstream->codec_data) goto fail;
|
|
|
|
start_offset = cfg.data_start_offset;
|
|
}
|
|
#else
|
|
goto fail;
|
|
#endif
|
|
|
|
/* open the file for reading */
|
|
if ( !vgmstream_open_stream(vgmstream, streamFile, start_offset) )
|
|
goto fail;
|
|
return vgmstream;
|
|
|
|
fail:
|
|
close_vgmstream(vgmstream);
|
|
return NULL;
|
|
}
|
|
|
|
/* SK/Ogg doesn't have num_samples info, manually read total samples */
|
|
static int get_sk_num_samples(STREAMFILE *streamFile, off_t start_offset) {
|
|
uint32_t expected_id = 0x11534B10; /* \11"SK"\10 (would read "OggS" by changing the ID) */
|
|
off_t off = get_streamfile_size(streamFile) - 4-1-1-8-4-4-4;
|
|
|
|
/* simplest way is to find last OggS/SK page from stream end */
|
|
while (off >= start_offset) {
|
|
uint32_t current_id = read_32bitBE(off, streamFile);
|
|
if (current_id == expected_id) { /* last packet starts with 0x0004, if more checks are needed */
|
|
return read_32bitLE(off+4+1+1, streamFile); /* get last granule = total samples (64b but whatevs) */
|
|
}
|
|
|
|
off--;
|
|
}
|
|
|
|
return 0;
|
|
}
|