mirror of
https://github.com/vgmstream/vgmstream.git
synced 2024-12-20 10:25:53 +01:00
118 lines
3.7 KiB
C
118 lines
3.7 KiB
C
#include "meta.h"
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#include "../coding/coding.h"
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#include "../util/chunks.h"
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enum {
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CHUNK_RIFF = 0x52494646, /* "RIFF" */
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CHUNK_LIST = 0x4C495354, /* "LIST" */
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CHUNK_segh = 0x73656768, /* "segh" */
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};
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/* DMSG - DirectMusic Segment with streams [Nightcaster II: Equinox (Xbox), Wildfire (PC)] */
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VGMSTREAM* init_vgmstream_dmsg(STREAMFILE* sf) {
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VGMSTREAM* vgmstream = NULL;
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//int loop_flag, channels, sample_rate;
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//int found_data = 0;
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//int32_t num_samples, loop_start, loop_end;
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//off_t start_offset;
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off_t offset = 0, name_offset = 0, name_size = 0;
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/* checks */
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/* .sgt: common
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* .dmsg: header id */
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if (!check_extensions(sf, "sgt,dmsg"))
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goto fail;
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if (!is_id32be(0x00,sf, "RIFF"))
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goto fail;
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if (!is_id32be(0x08,sf, "DMSG"))
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goto fail;
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/* A DirectMusic segment usually has lots of chunks then data pointing to .dls soundbank.
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* This accepts .sgt with a RIFF WAVE inside (less common). */
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{
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chunk_t rc = {0};
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chunk_t dc = {0};
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rc.current = 0x0c;
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while (next_chunk(&rc, sf)) {
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switch(rc.type) {
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/* "segh" has loopnum/samplesloop */
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case CHUNK_segh:
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//todo: missing TMusicTime format
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/* 0x00: dwRepeats (>0 or -1=inf)
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* 0x04: mtLength
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* 0x08: mtPlayStart
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* 0x0c: mtLoopStart
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* 0x10: mtLoopEnd
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* 0x14: dwResolution
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* 0x18: rtLength (optional)
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* .. */
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break;
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case CHUNK_LIST:
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if (is_id32be(rc.offset + 0x00, sf, "UNFO") && is_id32be(rc.offset + 0x04, sf, "UNAM")) {
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name_offset = rc.offset + 0x0c;
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name_size = read_u32le(rc.offset + 0x08, sf);
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}
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break;
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case CHUNK_RIFF:
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if (!is_id32be(rc.offset, sf, "DMCN"))
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goto fail;
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dc.current = rc.offset + 0x04;
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while (next_chunk(&dc, sf)) {
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switch(dc.type) {
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case CHUNK_LIST:
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/* abridged, there are some sublists */
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if (is_id32be(dc.offset + 0x00, sf, "cosl") && is_id32be(dc.offset + 0x30, sf, "WAVE")) {
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offset = dc.offset + 0x34;
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dc.current = -1;
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rc.current = -1;
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}
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break;
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default:
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break;
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}
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}
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break;
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default:
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break;
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}
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}
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}
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if (!offset)
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goto fail;
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/* subfile has a few extra chunks (guid, wavh) but otherwise standard (seen PCM and MS-ADPCM, with fact chunks) */
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{
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STREAMFILE* temp_sf = NULL;
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off_t subfile_offset = offset;
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size_t subfile_size = read_u32le(offset + 0x04, sf) + 0x08;
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temp_sf = setup_subfile_streamfile(sf, subfile_offset, subfile_size, "wav");
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if (!temp_sf) goto fail;
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vgmstream = init_vgmstream_riff(temp_sf);
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close_streamfile(temp_sf);
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if (!vgmstream) goto fail;
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if (name_offset) {
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if (name_size >= STREAM_NAME_SIZE)
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name_size = STREAM_NAME_SIZE;
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read_string_utf16le(vgmstream->stream_name,name_size, name_offset, sf);
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}
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return vgmstream;
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}
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fail:
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close_vgmstream(vgmstream);
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return NULL;
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}
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