Android AudioRecord 通过 RTP 发送

发布于 2024-12-14 18:43:43 字数 817 浏览 7 评论 0原文

背景

我正在创建一个 VoIP 应用程序。我知道已经有很多了，但我有我的理由。由于商业影响，我不能直接分叉 SipDroid，尽管它是一个高质量的应用程序。这个应用程序针对的是 Level 10 Gingerbread 2.3.3。

问题

我创建了一个简单的活动，它创建一个AudioRecord实例，然后开始循环：

int timestamp = 0;
int seqNr = 12;
while(true) {
    byte[] buffer = new byte[bufferSize];

    int num = recorder.read(buffer, 0, bufferSize);
    try {
        byte[] pcm = new byte[bufferSize];
        //
        // presumably here I convert the byte[] from PCM into G711??
        //
        RTPStream.Write(pcm,seqNr,timestamp);
        timestamp += num;
        seqNr++;
    } catch (IOException e) {
        e.printStackTrace();
    }
}

问题

如何将PCM 44KHz 16位单声道byte[]< /code> 到 G711u/a byte[] 的？

原文

Background

I am creating a VoIP app. I know that there are plenty of ones out already, but I have my reasons. Due to commercial implications I cannot just fork SipDroid, although it is a quality app. This app is aimed at Level 10 Gingerbread 2.3.3.

Problem

I have created a simple Activity which creates an AudioRecord instance, and then begins a loop:

int timestamp = 0;
int seqNr = 12;
while(true) {
    byte[] buffer = new byte[bufferSize];

    int num = recorder.read(buffer, 0, bufferSize);
    try {
        byte[] pcm = new byte[bufferSize];
        //
        // presumably here I convert the byte[] from PCM into G711??
        //
        RTPStream.Write(pcm,seqNr,timestamp);
        timestamp += num;
        seqNr++;
    } catch (IOException e) {
        e.printStackTrace();
    }
}

Question

How do I turn the PCM 44KHz 16bit Mono byte[]'s into G711u/a byte[]'s??

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