mirror of https://github.com/axmolengine/axmol.git
85 lines
2.4 KiB
C++
85 lines
2.4 KiB
C++
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#include "config.h"
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#include <stddef.h>
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#include "almalloc.h"
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#include "alspan.h"
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#include "base.h"
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#include "core/bufferline.h"
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#include "intrusive_ptr.h"
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struct ContextBase;
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struct DeviceBase;
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struct EffectSlot;
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namespace {
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struct NullState final : public EffectState {
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NullState();
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~NullState() override;
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void deviceUpdate(const DeviceBase *device, const BufferStorage *buffer) override;
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void update(const ContextBase *context, const EffectSlot *slot, const EffectProps *props,
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const EffectTarget target) override;
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void process(const size_t samplesToDo, const al::span<const FloatBufferLine> samplesIn,
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const al::span<FloatBufferLine> samplesOut) override;
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DEF_NEWDEL(NullState)
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};
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/* This constructs the effect state. It's called when the object is first
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* created.
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*/
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NullState::NullState() = default;
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/* This destructs the effect state. It's called only when the effect instance
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* is no longer used.
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*/
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NullState::~NullState() = default;
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/* This updates the device-dependant effect state. This is called on state
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* initialization and any time the device parameters (e.g. playback frequency,
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* format) have been changed. Will always be followed by a call to the update
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* method, if successful.
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*/
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void NullState::deviceUpdate(const DeviceBase* /*device*/, const BufferStorage* /*buffer*/)
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{
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}
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/* This updates the effect state with new properties. This is called any time
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* the effect is (re)loaded into a slot.
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*/
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void NullState::update(const ContextBase* /*context*/, const EffectSlot* /*slot*/,
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const EffectProps* /*props*/, const EffectTarget /*target*/)
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{
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}
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/* This processes the effect state, for the given number of samples from the
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* input to the output buffer. The result should be added to the output buffer,
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* not replace it.
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*/
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void NullState::process(const size_t/*samplesToDo*/,
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const al::span<const FloatBufferLine> /*samplesIn*/,
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const al::span<FloatBufferLine> /*samplesOut*/)
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{
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}
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struct NullStateFactory final : public EffectStateFactory {
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al::intrusive_ptr<EffectState> create() override;
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};
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/* Creates EffectState objects of the appropriate type. */
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al::intrusive_ptr<EffectState> NullStateFactory::create()
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{ return al::intrusive_ptr<EffectState>{new NullState{}}; }
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} // namespace
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EffectStateFactory *NullStateFactory_getFactory()
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{
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static NullStateFactory NullFactory{};
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return &NullFactory;
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}
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