Rockbox audio format

Question

How do you specify a callback for rb->pcm_play_data()?

Answer 1

The prototype for the callback function is as follows:

static void my_audio_callback(const void **start, size_t *size);

*start should be set to point to the region of memory where your PCM data is stored (16-bit signed integers), and *size should be the size of this region.

Once you've written your callback, call rb->pcm_play_data(), and enjoy the music!

rb->pcm_play_data(my_audio_callback, NULL, NULL, 0);

A very late edit: The format of the auto is 16-bit signed integer PCM, with stereo interleave (even indexes: left channel, odd: right).