[Opus] Update to v1.2.1

third_party/opus/src/src/opus_multistream_decoder.c

Index: third_party/opus/src/src/opus_multistream_decoder.c
diff --git a/third_party/opus/src/src/opus_multistream_decoder.c b/third_party/opus/src/src/opus_multistream_decoder.c
index b95eaa6eac12f036ab9f0a4de65621bf57e5b8c0..e421726f2b427dd2ddd4d20f1dfb99c2afb7008b 100644
--- a/third_party/opus/src/src/opus_multistream_decoder.c
+++ b/third_party/opus/src/src/opus_multistream_decoder.c
@@ -237,7 +237,8 @@ static int opus_multistream_decode_native(
    for (s=0;s<st->layout.nb_streams;s++)
    {
       OpusDecoder *dec;
-      int packet_offset, ret;
+      opus_int32 packet_offset;
+      int ret;
 
       dec = (OpusDecoder*)ptr;
       ptr += (s < st->layout.nb_coupled_streams) ? align(coupled_size) : align(mono_size);
@@ -425,6 +426,7 @@ int opus_multistream_decoder_ctl(OpusMSDecoder *st, int request, ...)
        case OPUS_GET_SAMPLE_RATE_REQUEST:
        case OPUS_GET_GAIN_REQUEST:
        case OPUS_GET_LAST_PACKET_DURATION_REQUEST:
+       case OPUS_GET_PHASE_INVERSION_DISABLED_REQUEST:
        {
           OpusDecoder *dec;
           /* For int32* GET params, just query the first stream */
@@ -499,6 +501,7 @@ int opus_multistream_decoder_ctl(OpusMSDecoder *st, int request, ...)
        }
        break;
        case OPUS_SET_GAIN_REQUEST:
+       case OPUS_SET_PHASE_INVERSION_DISABLED_REQUEST:
        {
           int s;
           /* This works for int32 params */