diff --git a/libavcodec/atrac3plus.c b/libavcodec/atrac3plus.c
index 25c4f76014..08c90cde98 100644
--- a/libavcodec/atrac3plus.c
+++ b/libavcodec/atrac3plus.c
@@ -247,6 +247,7 @@ static int num_coded_units(GetBitContext *gb, Atrac3pChanParams *chan,
  *
  * @param[in,out] ctx           ptr to the channel unit context
  * @param[in,out] chan          ptr to the channel parameters
+ * @param[in]     wtab_idx      index of the table of weights
  * @param[in]     avctx         ptr to the AVCodecContext
  * @return result code: 0 = OK, otherwise - error code
  */
diff --git a/libavcodec/atrac3plus.h b/libavcodec/atrac3plus.h
index 9171e6e411..1b001fae6d 100644
--- a/libavcodec/atrac3plus.h
+++ b/libavcodec/atrac3plus.h
@@ -202,7 +202,7 @@ void ff_atrac3p_generate_tones(Atrac3pChanUnitCtx *ch_unit, AVFloatDSPContext *f
  * @param[in]      ch_index    which channel to process
  * @param[in,out]  sp          ptr to channel spectrum to process
  * @param[in]      rng_index   indicates which RNG table to use
- * @param[in]      sb          which subband to process
+ * @param[in]      sb_num      which subband to process
  */
 void ff_atrac3p_power_compensation(Atrac3pChanUnitCtx *ctx, int ch_index,
                                    float *sp, int rng_index, int sb_num);
diff --git a/libavcodec/atrac3plusdec.c b/libavcodec/atrac3plusdec.c
index 51d7072374..545dbecc5d 100644
--- a/libavcodec/atrac3plusdec.c
+++ b/libavcodec/atrac3plusdec.c
@@ -135,6 +135,11 @@ static av_cold int atrac3p_decode_init(AVCodecContext *avctx)
     ATRAC3PContext *ctx = avctx->priv_data;
     int i, ch, ret;
 
+    if (!avctx->block_align) {
+        av_log(avctx, AV_LOG_ERROR, "block_align is not set\n");
+        return AVERROR(EINVAL);
+    }
+
     ff_atrac3p_init_vlcs();
 
     avpriv_float_dsp_init(&ctx->fdsp, avctx->flags & CODEC_FLAG_BITEXACT);
diff --git a/libavcodec/atrac3plusdsp.c b/libavcodec/atrac3plusdsp.c
index f8624b567b..3522af1e5a 100644
--- a/libavcodec/atrac3plusdsp.c
+++ b/libavcodec/atrac3plusdsp.c
@@ -116,6 +116,7 @@ av_cold void ff_atrac3p_init_wave_synth(void)
  *  @param[in]    synth_param   ptr to common synthesis parameters
  *  @param[in]    waves_info    parameters for each sine wave
  *  @param[in]    envelope      envelope data for all waves in a group
+ *  @param[in]    phase_shift   flag indicates 180° phase shift
  *  @param[in]    reg_offset    region offset for trimming envelope data
  *  @param[out]   out           receives sythesized data
  */
diff --git a/libavcodec/version.h b/libavcodec/version.h
index 643694733c..b27a8a6171 100644
--- a/libavcodec/version.h
+++ b/libavcodec/version.h
@@ -30,7 +30,7 @@
 
 #define LIBAVCODEC_VERSION_MAJOR 55
 #define LIBAVCODEC_VERSION_MINOR  47
-#define LIBAVCODEC_VERSION_MICRO 100
+#define LIBAVCODEC_VERSION_MICRO 101
 
 #define LIBAVCODEC_VERSION_INT  AV_VERSION_INT(LIBAVCODEC_VERSION_MAJOR, \
                                                LIBAVCODEC_VERSION_MINOR, \