lavc: set bit_rate in the decoder context, just after the init stage

Also move the get_bit_rate() function, in order to avoid an undefined
symbol reference in avcodec_open2().

libavcodec/utils.c

@@ -677,6 +677,29 @@ static void avcodec_get_subtitle_defaults(AVSubtitle *sub)
     sub->pts = AV_NOPTS_VALUE;
 }
 
+static int get_bit_rate(AVCodecContext *ctx)
+{
+    int bit_rate;
+    int bits_per_sample;
+
+    switch(ctx->codec_type) {
+    case AVMEDIA_TYPE_VIDEO:
+    case AVMEDIA_TYPE_DATA:
+    case AVMEDIA_TYPE_SUBTITLE:
+    case AVMEDIA_TYPE_ATTACHMENT:
+        bit_rate = ctx->bit_rate;
+        break;
+    case AVMEDIA_TYPE_AUDIO:
+        bits_per_sample = av_get_bits_per_sample(ctx->codec_id);
+        bit_rate = bits_per_sample ? ctx->sample_rate * ctx->channels * bits_per_sample : ctx->bit_rate;
+        break;
+    default:
+        bit_rate = 0;
+        break;
+    }
+    return bit_rate;
+}
+
 #if FF_API_AVCODEC_OPEN
 int attribute_align_arg avcodec_open(AVCodecContext *avctx, AVCodec *codec)
 {
@@ -889,6 +912,9 @@ int attribute_align_arg avcodec_open2(AVCodecContext *avctx, AVCodec *codec, AVD
         }
     }
 
+    if (codec_is_decoder(avctx->codec) && !avctx->bit_rate)
+        avctx->bit_rate = get_bit_rate(avctx);
+
     ret=0;
 end:
     entangled_thread_counter--;
@@ -1602,29 +1628,6 @@ AVCodec *avcodec_find_decoder_by_name(const char *name)
     return NULL;
 }
 
-static int get_bit_rate(AVCodecContext *ctx)
-{
-    int bit_rate;
-    int bits_per_sample;
-
-    switch(ctx->codec_type) {
-    case AVMEDIA_TYPE_VIDEO:
-    case AVMEDIA_TYPE_DATA:
-    case AVMEDIA_TYPE_SUBTITLE:
-    case AVMEDIA_TYPE_ATTACHMENT:
-        bit_rate = ctx->bit_rate;
-        break;
-    case AVMEDIA_TYPE_AUDIO:
-        bits_per_sample = av_get_bits_per_sample(ctx->codec_id);
-        bit_rate = bits_per_sample ? ctx->sample_rate * ctx->channels * bits_per_sample : ctx->bit_rate;
-        break;
-    default:
-        bit_rate = 0;
-        break;
-    }
-    return bit_rate;
-}
-
 const char *avcodec_get_name(enum CodecID id)
 {
     AVCodec *codec;

libavcodec/version.h

@@ -22,7 +22,7 @@
 
 #define LIBAVCODEC_VERSION_MAJOR 54
 #define LIBAVCODEC_VERSION_MINOR  3
-#define LIBAVCODEC_VERSION_MICRO 100
+#define LIBAVCODEC_VERSION_MICRO 101
 
 #define LIBAVCODEC_VERSION_INT  AV_VERSION_INT(LIBAVCODEC_VERSION_MAJOR, \
                                                LIBAVCODEC_VERSION_MINOR, \