pcm-mpeg: correct bitrate calculation

Bitrate calculation is off since the bluray spec always specifies
an even number of coded channels. This was honored in the decoder,
but not for bitrate calculation.
Signed-off-by: Luca Barbato <lu_zero@gentoo.org>

libavcodec/pcm-mpeg.c

@@ -109,12 +109,12 @@ static int pcm_bluray_parse_header(AVCodecContext *avctx,
         return -1;
     }
 
-    avctx->bit_rate = avctx->channels * avctx->sample_rate *
+    avctx->bit_rate = FFALIGN(avctx->channels, 2) * avctx->sample_rate *
                       avctx->bits_per_coded_sample;
 
     if (avctx->debug & FF_DEBUG_PICT_INFO)
         av_dlog(avctx,
-                "pcm_bluray_parse_header: %d channels, %d bits per sample, %d kHz, %d kbit\n",
+                "pcm_bluray_parse_header: %d channels, %d bits per sample, %d Hz, %d bit/s\n",
                 avctx->channels, avctx->bits_per_coded_sample,
                 avctx->sample_rate, avctx->bit_rate);
     return 0;