133 lines
5.0 KiB
JavaScript
133 lines
5.0 KiB
JavaScript
SoundRecognizer = {
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rec: null,
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wave: null,
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SampleRate: 16000,
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testBitRate: 16,
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isCloseRecorder: false,
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SendInterval: 300,
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realTimeSendTryType: 'wav',
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realTimeSendTryEncBusy: 0,
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realTimeSendTryTime: 0,
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realTimeSendTryNumber: 0,
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transferUploadNumberMax: 0,
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realTimeSendTryChunk: null,
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soundType: "wav",
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init: function (config) {
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this.soundType = config.soundType || 'wav';
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this.SampleRate = config.sampleRate || 16000;
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this.recwaveElm = config.recwaveElm || '';
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this.TransferUpload = config.translerCallBack || this.TransferProcess;
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this.initRecorder();
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},
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RealTimeSendTryReset: function (type) {
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this.realTimeSendTryType = type;
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this.realTimeSendTryTime = 0;
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},
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RealTimeSendTry: function (rec, isClose) {
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var that = this;
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var t1 = Date.now(), endT = 0, recImpl = Recorder.prototype;
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if (this.realTimeSendTryTime == 0) {
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this.realTimeSendTryTime = t1;
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this.realTimeSendTryEncBusy = 0;
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this.realTimeSendTryNumber = 0;
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this.transferUploadNumberMax = 0;
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this.realTimeSendTryChunk = null;
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}
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if (!isClose && t1 - this.realTimeSendTryTime < this.SendInterval) {
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return;//控制缓冲达到指定间隔才进行传输
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}
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this.realTimeSendTryTime = t1;
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var number = ++this.realTimeSendTryNumber;
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//借用SampleData函数进行数据的连续处理，采样率转换是顺带的
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var chunk = Recorder.SampleData(rec.buffers, rec.srcSampleRate, this.SampleRate, this.realTimeSendTryChunk, { frameType: isClose ? "" : this.realTimeSendTryType });
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//清理已处理完的缓冲数据，释放内存以支持长时间录音，最后完成录音时不能调用stop，因为数据已经被清掉了
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for (var i = this.realTimeSendTryChunk ? this.realTimeSendTryChunk.index : 0; i < chunk.index; i++) {
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rec.buffers[i] = null;
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}
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this.realTimeSendTryChunk = chunk;
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//没有新数据，或结束时的数据量太小，不能进行mock转码
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if (chunk.data.length == 0 || isClose && chunk.data.length < 2000) {
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this.TransferUpload(number, null, 0, null, isClose);
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return;
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}
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//实时编码队列阻塞处理
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if (!isClose) {
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if (this.realTimeSendTryEncBusy >= 2) {
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console.log("编码队列阻塞，已丢弃一帧", 1);
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return;
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}
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}
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this.realTimeSendTryEncBusy++;
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//通过mock方法实时转码成mp3、wav
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var encStartTime = Date.now();
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var recMock = Recorder({
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type: this.realTimeSendTryType
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, sampleRate: this.SampleRate //采样率
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, bitRate: this.testBitRate //比特率
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});
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recMock.mock(chunk.data, chunk.sampleRate);
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recMock.stop(function (blob, duration) {
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that.realTimeSendTryEncBusy && (that.realTimeSendTryEncBusy--);
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blob.encTime = Date.now() - encStartTime;
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//转码好就推入传输
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that.TransferUpload(number, blob, duration, recMock, isClose);
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}, function (msg) {
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that.realTimeSendTryEncBusy && (that.realTimeSendTryEncBusy--);
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//转码错误？没想到什么时候会产生错误！
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console.log("不应该出现的错误:" + msg, 1);
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});
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},
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recordClose: function () {
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try {
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this.rec.close(function () {
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this.isCloseRecorder = true;
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});
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this.RealTimeSendTry(this.rec, true);//最后一次发送
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} catch (ex) {
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// recordClose();
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}
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},
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recordEnd: function () {
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try {
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this.rec.stop(function (blob, time) {
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this.recordClose();
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}, function (s) {
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this.recordClose();
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});
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} catch (ex) {
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}
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},
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initRecorder: function () {
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var that = this;
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var rec = Recorder({
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type: that.soundType
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, bitRate: that.testBitRate
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, sampleRate: that.SampleRate
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, onProcess: function (buffers, level, time, sampleRate) {
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that.wave.input(buffers[buffers.length - 1], level, sampleRate);
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that.RealTimeSendTry(rec, false);//推入实时处理，因为是unknown格式，这里简化函数调用，没有用到buffers和bufferSampleRate，因为这些数据和rec.buffers是完全相同的。
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}
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});
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rec.open(function () {
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that.wave = Recorder.FrequencyHistogramView({
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elem: that.recwaveElm, lineCount: 90
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, position: 0
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, minHeight: 1
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, stripeEnable: false
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});
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rec.start();
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that.isCloseRecorder = false;
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that.RealTimeSendTryReset(that.soundType);//重置
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});
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this.rec = rec;
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},
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TransferProcess: function (number, blobOrNull, duration, blobRec, isClose) {
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}
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} |