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MT#04286 - explicitly construct adpcm_state which is embedded in the legacy

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device state for Seibu ADPCM. Legacy device tokens are just allocated as a
dumb blob of bytes, so constructors for embedded objects are never called.
This commit is contained in:
Aaron Giles 2011-03-31 06:26:41 +00:00
parent bcf9e72cc5
commit e86777d670
1 changed files with 5 additions and 0 deletions
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5
src/mame/audio/seibu.c
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@ -176,6 +176,11 @@ static DEVICE_START( seibu_adpcm )
state->playing = 0;
state->stream = device->machine().sound().stream_alloc(*device, 0, 1, device->clock(), state, seibu_adpcm_callback);
state->base = machine.region("adpcm")->base();
// because legacy device tokens are just allocated as a blob, the constructor for adpcm_state
// is not called, so use placement new to force it to set up; when this is converted to a
// modern device, we can remove this grossness
new(&state->adpcm) adpcm_state;
state->adpcm.reset();
}