mirror of
https://github.com/vgmstream/vgmstream.git
synced 2024-12-12 14:51:05 +01:00
73 lines
2.6 KiB
C
73 lines
2.6 KiB
C
#include "meta.h"
|
|
#include "../util.h"
|
|
#include "../coding/coding.h"
|
|
|
|
|
|
/* OGL - Shin'en custom Vorbis [Jett Rocket (Wii), FAST Racing NEO (WiiU)] */
|
|
VGMSTREAM * init_vgmstream_ogl(STREAMFILE *streamFile) {
|
|
VGMSTREAM * vgmstream = NULL;
|
|
off_t start_offset;
|
|
size_t partial_file_size;
|
|
int loop_flag, channel_count, sample_rate;
|
|
uint32_t num_samples, loop_start_sample, loop_end_sample;
|
|
|
|
/* check extension, case insensitive */
|
|
if (!check_extensions(streamFile,"ogl"))
|
|
goto fail;
|
|
|
|
/* OGL headers are very basic with no ID but libvorbis should reject garbage data anyway */
|
|
loop_flag = read_32bitLE(0x00,streamFile) > 0; /* absolute loop offset */
|
|
loop_start_sample = read_32bitLE(0x04,streamFile);
|
|
//loop_start_block = read_32bitLE(0x08,streamFile);
|
|
num_samples = read_32bitLE(0x0c,streamFile);
|
|
partial_file_size = read_32bitLE(0x10,streamFile); /* header + data not counting end padding */
|
|
if (partial_file_size > get_streamfile_size(streamFile)) goto fail;
|
|
loop_end_sample = num_samples; /* there is no data after num_samples (ie.- it's really num_samples) */
|
|
|
|
/* actually peeking into the Vorbis id packet */
|
|
channel_count = read_8bit (0x21,streamFile);
|
|
sample_rate = read_32bitLE(0x22,streamFile);
|
|
|
|
|
|
/* build the VGMSTREAM */
|
|
vgmstream = allocate_vgmstream(channel_count,loop_flag);
|
|
if (!vgmstream) goto fail;
|
|
|
|
vgmstream->sample_rate = sample_rate;
|
|
vgmstream->num_samples = num_samples;
|
|
vgmstream->loop_start_sample = loop_start_sample;
|
|
vgmstream->loop_end_sample = loop_end_sample;
|
|
vgmstream->meta_type = meta_OGL;
|
|
|
|
#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, 0x14, VORBIS_OGL, &cfg);
|
|
if (!vgmstream->codec_data) goto fail;
|
|
|
|
start_offset = cfg.data_start_offset;
|
|
}
|
|
#else
|
|
goto fail;
|
|
#endif
|
|
|
|
/* non-looping files do this */
|
|
if (!num_samples) {
|
|
uint32_t avg_bitrate = read_32bitLE(0x2a,streamFile); /* inside id packet */
|
|
/* approximate as we don't know the sizes of all packet headers */ //todo this is wrong... but somehow works?
|
|
vgmstream->num_samples = (partial_file_size - start_offset) * ((sample_rate*10/avg_bitrate)+1);
|
|
}
|
|
|
|
/* open the file for reading */
|
|
if ( !vgmstream_open_stream(vgmstream, streamFile, start_offset) )
|
|
goto fail;
|
|
return vgmstream;
|
|
|
|
fail:
|
|
close_vgmstream(vgmstream);
|
|
return NULL;
|
|
}
|