libvorbis: fix use of minrate/maxrate AVOptions

- enable the options for audio encoding
- properly check for user-set maxrate
- use correct calling order in vorbis_encode_setup_managed()

libavcodec/libvorbis.c

@@ -93,12 +93,12 @@ static av_cold int oggvorbis_init_encoder(vorbis_info *vi,
             goto error;
     } else {
         int minrate = avctx->rc_min_rate > 0 ? avctx->rc_min_rate : -1;
-        int maxrate = avctx->rc_min_rate > 0 ? avctx->rc_max_rate : -1;
+        int maxrate = avctx->rc_max_rate > 0 ? avctx->rc_max_rate : -1;
 
         /* average bitrate */
         if ((ret = vorbis_encode_setup_managed(vi, avctx->channels,
-                                               avctx->sample_rate, minrate,
-                                               avctx->bit_rate, maxrate)))
+                                               avctx->sample_rate, maxrate,
+                                               avctx->bit_rate, minrate)))
             goto error;
 
         /* variable bitrate by estimate, disable slow rate management */

libavcodec/options.c

@@ -195,8 +195,8 @@ static const AVOption options[]={
 {"rc_qmod_freq", "experimental quantizer modulation", OFFSET(rc_qmod_freq), AV_OPT_TYPE_INT, {.dbl = DEFAULT }, INT_MIN, INT_MAX, V|E},
 {"rc_override_count", NULL, OFFSET(rc_override_count), AV_OPT_TYPE_INT, {.dbl = DEFAULT }, INT_MIN, INT_MAX},
 {"rc_eq", "set rate control equation", OFFSET(rc_eq), AV_OPT_TYPE_STRING, {.str = NULL}, CHAR_MIN, CHAR_MAX, V|E},
-{"maxrate", "set max video bitrate tolerance (in bits/s)", OFFSET(rc_max_rate), AV_OPT_TYPE_INT, {.dbl = DEFAULT }, INT_MIN, INT_MAX, V|E},
-{"minrate", "set min video bitrate tolerance (in bits/s)", OFFSET(rc_min_rate), AV_OPT_TYPE_INT, {.dbl = DEFAULT }, INT_MIN, INT_MAX, V|E},
+{"maxrate", "set max bitrate tolerance (in bits/s)", OFFSET(rc_max_rate), AV_OPT_TYPE_INT, {.dbl = DEFAULT }, INT_MIN, INT_MAX, V|A|E},
+{"minrate", "set min bitrate tolerance (in bits/s)", OFFSET(rc_min_rate), AV_OPT_TYPE_INT, {.dbl = DEFAULT }, INT_MIN, INT_MAX, V|A|E},
 {"bufsize", "set ratecontrol buffer size (in bits)", OFFSET(rc_buffer_size), AV_OPT_TYPE_INT, {.dbl = DEFAULT }, INT_MIN, INT_MAX, A|V|E},
 {"rc_buf_aggressivity", "currently useless", OFFSET(rc_buffer_aggressivity), AV_OPT_TYPE_FLOAT, {.dbl = 1.0 }, -FLT_MAX, FLT_MAX, V|E},
 {"i_qfactor", "qp factor between P and I frames", OFFSET(i_quant_factor), AV_OPT_TYPE_FLOAT, {.dbl = -0.8 }, -FLT_MAX, FLT_MAX, V|E},