如何知道 Android 解码器 MediaCodec.createDecoderByType(type) 是硬件解码器还是软件解码器？

Question

有没有办法找出使用 MediaCodec.createDecoderByType(type) 接收的解码器是硬件解码器还是软件解码器？

Answer 1

There is no real formal flag for indicating whether a codec is a hardware or software codec. In practice, you can do this, though:

MediaCodec codec = MediaCodec.createDecoderByType(type);
if (codec.getName().startsWith("OMX.google.")) {
    // Is a software codec
}

(The MediaCodec.getName() method is available since API level 18. For lower API levels, you instead need to iterate over the entries in MediaCodecList and manually pick the right codec that fits your needs instead.)

Answer 2

Putting it here for anyone it might help. According to code for libstagefright, any codec which starts with OMX.google. or c2.android. or does not start with ( OMX. and c2. ) are all software codecs.
Source:
https://android.googlesource.com/platform/frameworks/av/+/master/media/libstagefright/MediaCodecList.cpp#320