[opus] [PATCH] Fix ambisonics bitrate when bitrate_bps is OPUS_AUTO

[Michael Graczyk]

Change-Id: I16bd4cd990d8ad5888c9e30016218ac25242ecb5
---
 src/opus_multistream_encoder.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/src/opus_multistream_encoder.c b/src/opus_multistream_encoder.c
index 30cafe1..c07132f 100644
--- a/src/opus_multistream_encoder.c
+++ b/src/opus_multistream_encoder.c
@@ -747,7 +747,8 @@ static void ambisonics_rate_allocation(
 
    if (st->bitrate_bps==OPUS_AUTO)
    {
-      total_rate = num_channels * (20000 + st->layout.nb_streams*(Fs+60*Fs/frame_size));
+      total_rate = (st->layout.nb_coupled_streams + st->layout.nb_streams) *
+         (Fs+60*Fs/frame_size) + st->layout.nb_streams * 15000;
    } else if (st->bitrate_bps==OPUS_BITRATE_MAX)
    {
       total_rate = num_channels * 320000;
-- 
2.8.0.rc3.226.g39d4020