Method LoadFile

src/music/dmusic.cpp:423–508

}

bool DLSFile::LoadFile(std::string_view file)
{
	Debug(driver, 2, "DMusic: Try to load DLS file {}", file);

	auto of = FileHandle::Open(file, "rb");
	if (!of.has_value()) return false;
	auto &f = *of;

	/* Check DLS file header. */
	ChunkHeader hdr;
	FOURCC dls_type;
	if (fread(&hdr, sizeof(hdr), 1, f) != 1) return false;
	if (fread(&dls_type, sizeof(dls_type), 1, f) != 1) return false;
	if (hdr.type != FOURCC_RIFF || dls_type != FOURCC_DLS) return false;

	hdr.length -= sizeof(FOURCC);

	Debug(driver, 2, "DMusic: Parsing DLS file");

	DLSHEADER header{};

	/* Iterate over all chunks in the file. */
	while (hdr.length > 0) {
		ChunkHeader chunk;
		if (fread(&chunk, sizeof(chunk), 1, f) != 1) return false;
		hdr.length -= chunk.length + sizeof(chunk);

		if (chunk.type == FOURCC_LIST) {
			/* Unwrap list header. */
			if (fread(&chunk.type, sizeof(chunk.type), 1, f) != 1) return false;
			chunk.length -= sizeof(chunk.type);
		}

		switch (chunk.type) {
			case FOURCC_COLH:
				if (fread(&header, sizeof(header), 1, f) != 1) return false;
				break;

			case FOURCC_LINS: // List chunk
				if (!this->ReadDLSInstrumentList(f, chunk.length)) return false;
				break;

			case FOURCC_WVPL: // List chunk
				if (!this->ReadDLSWaveList(f, chunk.length)) return false;
				break;

			case FOURCC_PTBL:
				POOLTABLE ptbl;
				if (fread(&ptbl, sizeof(ptbl), 1, f) != 1) return false;
				fseek(f, ptbl.cbSize - sizeof(ptbl), SEEK_CUR);

				/* Read all defined cues. */
				for (ULONG i = 0; i < ptbl.cCues; i++) {
					POOLCUE cue;
					if (fread(&cue, sizeof(cue), 1, f) != 1) return false;
					this->pool_cues.push_back(cue);
				}
				break;