- /* allow downmixing to stereo (or mono for AC-3) */
- if(avctx->request_channels > 0 &&
- avctx->request_channels < s->channels &&
- (avctx->request_channels <= 2 ||
- (avctx->request_channels == 1 &&
- (avctx->codec_id == AV_CODEC_ID_AC3 ||
- avctx->codec_id == AV_CODEC_ID_EAC3)))) {
- avctx->channels = avctx->request_channels;
+ /* (E-)AC-3: allow downmixing to stereo or mono */
+#if FF_API_REQUEST_CHANNELS
+FF_DISABLE_DEPRECATION_WARNINGS
+ if (avctx->request_channels == 1)
+ avctx->request_channel_layout = AV_CH_LAYOUT_MONO;
+ else if (avctx->request_channels == 2)
+ avctx->request_channel_layout = AV_CH_LAYOUT_STEREO;
+FF_ENABLE_DEPRECATION_WARNINGS
+#endif
+ if (s->channels > 1 &&
+ avctx->request_channel_layout == AV_CH_LAYOUT_MONO) {
+ avctx->channels = 1;
+ avctx->channel_layout = AV_CH_LAYOUT_MONO;
+ } else if (s->channels > 2 &&
+ avctx->request_channel_layout == AV_CH_LAYOUT_STEREO) {
+ avctx->channels = 2;
+ avctx->channel_layout = AV_CH_LAYOUT_STEREO;