73 lines
2.0 KiB
C
73 lines
2.0 KiB
C
#include "meta.h"
|
|
#include "../coding/coding.h"
|
|
|
|
|
|
/* MPEG - standard MP1/2/3 audio */
|
|
VGMSTREAM* init_vgmstream_mpeg(STREAMFILE* sf) {
|
|
#ifdef VGM_USE_MPEG
|
|
VGMSTREAM* vgmstream = NULL;
|
|
uint32_t start_offset;
|
|
int loop_flag = 0;
|
|
mpeg_frame_info info = {0};
|
|
uint32_t header_id;
|
|
|
|
|
|
/* checks */
|
|
header_id = read_u32be(0x00, sf);
|
|
if ((header_id & 0xFFF00000) != 0xFFF00000 &&
|
|
(header_id & 0xFFFFFF00) != get_id32be("ID3\0") &&
|
|
(header_id & 0xFFFFFF00) != get_id32be("TAG\0"))
|
|
goto fail;
|
|
|
|
//TODO: may try init_mpeg as-is, already skips tags
|
|
start_offset = 0x00;
|
|
while (start_offset < get_streamfile_size(sf)) {
|
|
uint32_t tag_size = mpeg_get_tag_size(sf, start_offset, 0);
|
|
if (tag_size == 0)
|
|
break;
|
|
start_offset += tag_size;
|
|
}
|
|
|
|
if (!mpeg_get_frame_info(sf, start_offset, &info))
|
|
goto fail;
|
|
|
|
/* .mp3/mp2: standard (is .mp1 ever used in games?)
|
|
* .lmp1/2/3: for plugins
|
|
* .mus: Marc Ecko's Getting Up (PC) */
|
|
if (!check_extensions(sf, "mp3,mp2,mp1,mus,lmp3,lmp2,lmp1"))
|
|
goto fail;
|
|
|
|
loop_flag = 0;
|
|
|
|
|
|
/* build VGMSTREAM */
|
|
vgmstream = allocate_vgmstream(info.channels, loop_flag);
|
|
if (!vgmstream) goto fail;
|
|
|
|
vgmstream->meta_type = meta_MPEG;
|
|
vgmstream->sample_rate = info.sample_rate;
|
|
|
|
/* more strict, use? */
|
|
//mpeg_custom_config cfg = {0};
|
|
//cfg.skip_samples = ...
|
|
//vgmstream->codec_data = init_mpeg_custom(sf, start_offset, &vgmstream->coding_type, fmt.channels, MPEG_STANDARD, &cfg);
|
|
|
|
vgmstream->codec_data = init_mpeg(sf, 0x00, &vgmstream->coding_type, info.channels);
|
|
if (!vgmstream->codec_data) goto fail;
|
|
vgmstream->layout_type = layout_none;
|
|
|
|
//vgmstream->num_samples = mpeg_bytes_to_samples(data_size, vgmstream->codec_data);
|
|
vgmstream->num_samples = mpeg_get_samples(sf, 0x00, get_streamfile_size(sf));
|
|
|
|
|
|
if (!vgmstream_open_stream(vgmstream, sf, 0x00))
|
|
goto fail;
|
|
return vgmstream;
|
|
fail:
|
|
close_vgmstream(vgmstream);
|
|
return NULL;
|
|
#else
|
|
return NULL;
|
|
#endif
|
|
}
|