75 lines
2 KiB
Go
75 lines
2 KiB
Go
// Copyright 2022 The Oto Authors
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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//go:build nintendosdk
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package oto
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// #cgo !darwin LDFLAGS: -Wl,-unresolved-symbols=ignore-all
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// #cgo darwin LDFLAGS: -Wl,-undefined,dynamic_lookup
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//
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// typedef void (*oto_OnReadCallbackType)(float* buf, size_t length);
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//
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// void oto_OpenAudio(int sample_rate, int channel_num, oto_OnReadCallbackType on_read_callback, int buffer_size_in_bytes);
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//
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// void oto_OnReadCallback(float* buf, size_t length);
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// static void oto_OpenProxy(int sample_rate, int channel_num, int buffer_size_in_bytes) {
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// oto_OpenAudio(sample_rate, channel_num, oto_OnReadCallback, buffer_size_in_bytes);
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// }
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import "C"
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import (
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"unsafe"
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"github.com/ebitengine/oto/v3/internal/mux"
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)
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//export oto_OnReadCallback
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func oto_OnReadCallback(buf *C.float, length C.size_t) {
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theContext.mux.ReadFloat32s(unsafe.Slice((*float32)(unsafe.Pointer(buf)), length))
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}
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type context struct {
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mux *mux.Mux
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}
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var theContext *context
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func newContext(sampleRate int, channelCount int, format mux.Format, bufferSizeInBytes int) (*context, chan struct{}, error) {
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ready := make(chan struct{})
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close(ready)
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c := &context{
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mux: mux.New(sampleRate, channelCount, format),
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}
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theContext = c
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C.oto_OpenProxy(C.int(sampleRate), C.int(channelCount), C.int(bufferSizeInBytes))
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return c, ready, nil
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}
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func (c *context) Suspend() error {
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// Do nothing so far.
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return nil
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}
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func (c *context) Resume() error {
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// Do nothing so far.
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return nil
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}
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func (c *context) Err() error {
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return nil
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}
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