diff options
Diffstat (limited to 'backends')
| -rw-r--r-- | backends/midi/adlib.cpp | 19 |
1 files changed, 16 insertions, 3 deletions
diff --git a/backends/midi/adlib.cpp b/backends/midi/adlib.cpp index cf1b453e88..f19596ffd6 100644 --- a/backends/midi/adlib.cpp +++ b/backends/midi/adlib.cpp @@ -503,6 +503,8 @@ public: void send(uint32 b); void pause(bool p) { } void set_stream_callback(void *param, StreamCallback *sc) { } // No streaming support. Use MidiStreamer wrapper + uint32 property (int prop, uint32 param); + void setPitchBendRange (byte channel, uint range); void sysEx_customInstrument (byte channel, uint32 type, byte *instr); @@ -520,6 +522,7 @@ public: private: int _mode; + bool _game_SmallHeader; FM_OPL *_opl; byte *_adlib_reg_cache; @@ -726,6 +729,7 @@ MidiDriver_ADLIB::MidiDriver_ADLIB() for (i = 0; i < ARRAYSIZE(_parts); ++i) { _parts[i].init (this); } + _game_SmallHeader = false; } int MidiDriver_ADLIB::open (int mode) @@ -811,6 +815,17 @@ void MidiDriver_ADLIB::send (uint32 b) } } +uint32 MidiDriver_ADLIB::property (int prop, uint32 param) +{ + switch (prop) { + case PROP_SMALLHEADER: // Indicates older game, use different operator volume algorithm + _game_SmallHeader = (param > 0); + return 1; + } + + return 0; +} + void MidiDriver_ADLIB::setPitchBendRange (byte channel, uint range) { MidiChannelAdl *mc; @@ -1302,9 +1317,7 @@ void MidiDriver_ADLIB::adlib_setup_channel(int chan, Instrument * instr, byte vo port = channel_mappings[chan]; adlib_write(port + 0x20, instr->flags_1); - // FIXME: Without using g_scumm, this may make older games sound weird. - // Gotta transform the volume *before* it gets sent here. - if (/*!(g_scumm->_features & GF_SMALL_HEADER)*/true ||(instr->feedback & 1)) + if (!_game_SmallHeader ||(instr->feedback & 1)) adlib_write(port + 0x40, (instr->oplvl_1 | 0x3F) - vol_1 ); else adlib_write(port + 0x40, instr->oplvl_1); |