diff options
author | 2020-11-07 07:00:47 +0900 | |
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committer | 2020-11-07 09:00:47 +1100 | |
commit | b697d7d9ca18926f4f41d15b55ba367dc482c115 (patch) | |
tree | 88bcd26354937ac339fcf1b18dafd73beaa8344c | |
parent | 1b9b9c9509bcafde50314c0e45c614806861ef66 (diff) |
c140.cpp: Reduce duplication in fetching sample (#7439)
-rw-r--r-- | src/devices/sound/c140.cpp | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/src/devices/sound/c140.cpp b/src/devices/sound/c140.cpp index 5d0b0811854..62e32707f6c 100644 --- a/src/devices/sound/c140.cpp +++ b/src/devices/sound/c140.cpp @@ -292,8 +292,9 @@ void c140_device::sound_stream_update(sound_stream &stream, std::vector<read_str if (cnt) { + const u16 sample = read_word((sampleData + pos) << 1) & 0xfff0; // 12bit prevdt = lastdt; - lastdt = ((ch_mulaw(v)) ? m_pcmtbl[read_byte((sampleData + pos) << 1)] : s16(read_word((sampleData + pos) << 1) & 0xfff0)) >> 4; // 12bit + lastdt = ((ch_mulaw(v)) ? m_pcmtbl[(sample >> 8) & 0xff] : s16(sample)) >> 4; dltdt = (lastdt - prevdt); } |