I2S interface is available even if you are using GPIF II interface in 32-bit mode.
But the unfortunate thing is that FX3 has I2S transmitter only. It can transmit data out of FX3. It cannot take audio input data from the external device.
What is the sampling frequency that you are targeting in your application?
We want FX3 to receive streaming of video and audio together .我们想用FX3接收视频和音频流（I2S）。
目前例子中只有可以接收视频流的。例如USB video class (UVC) Framework。
Now the example is only that receive streaming of video. sampling frequency that we are targeting in your application is 74.25mhz.,sampling frequency of i2s is 48khz.. help us ,how we to do?