+ if (avctx->frame_size) {
+ /* validate frame size */
+ if (avctx->frame_size & 1 || avctx->frame_size > MAX_FRAME_SIZE) {
+ int new_frame_size;
+
+ if (avctx->frame_size == 1)
+ new_frame_size = 2;
+ else if (avctx->frame_size > MAX_FRAME_SIZE)
+ new_frame_size = MAX_FRAME_SIZE;
+ else
+ new_frame_size = avctx->frame_size - 1;
+
+ av_log(avctx, AV_LOG_WARNING, "Requested frame size is not "
+ "allowed. Using %d instead of %d\n", new_frame_size,
+ avctx->frame_size);
+ avctx->frame_size = new_frame_size;
+ }
+ } else {
+ /* This is arbitrary. We use 320 because it's 20ms @ 16kHz, which is
+ a common packet size for VoIP applications */
+ avctx->frame_size = 320;
+ }
+ avctx->initial_padding = 22;