ffserver: export recommented encoder configuration

Signed-off-by: Lukasz Marek <lukasz.m.luki2@gmail.com>

ffserver.c

@@ -3326,8 +3326,7 @@ static int add_av_stream(FFServerStream *feed, AVStream *st)
 
     av = st->codec;
     for(i=0;i<feed->nb_streams;i++) {
-        st = feed->streams[i];
-        av1 = st->codec;
+        av1 = feed->streams[i]->codec;
         if (av1->codec_id == av->codec_id &&
             av1->codec_type == av->codec_type &&
             av1->bit_rate == av->bit_rate) {
@@ -3355,6 +3354,9 @@ static int add_av_stream(FFServerStream *feed, AVStream *st)
     fst = add_av_stream1(feed, av, 0);
     if (!fst)
         return -1;
+    if (av_stream_get_recommended_encoder_configuration(st))
+        av_stream_set_recommended_encoder_configuration(fst,
+            av_strdup(av_stream_get_recommended_encoder_configuration(st)));
     return feed->nb_streams - 1;
 }
 

ffserver_config.c

@@ -178,13 +178,15 @@ static void add_codec(FFServerStream *stream, AVCodecContext *av,
                       FFServerConfig *config)
 {
     AVStream *st;
-    AVDictionary **opts;
+    AVDictionary **opts, *recommended = NULL;
+    char *enc_config;
 
     if(stream->nb_streams >= FF_ARRAY_ELEMS(stream->streams))
         return;
 
     opts = av->codec_type == AVMEDIA_TYPE_AUDIO ?
            &config->audio_opts : &config->video_opts;
+    av_dict_copy(&recommended, *opts, 0);
     av_opt_set_dict2(av->priv_data, opts, AV_OPT_SEARCH_CHILDREN);
     av_opt_set_dict2(av, opts, AV_OPT_SEARCH_CHILDREN);
     if (av_dict_count(*opts))
@@ -196,63 +198,99 @@ static void add_codec(FFServerStream *stream, AVCodecContext *av,
     /* compute default parameters */
     switch(av->codec_type) {
     case AVMEDIA_TYPE_AUDIO:
-        if (av->bit_rate == 0)
+        if (av->bit_rate == 0) {
             av->bit_rate = 64000;
-        if (av->sample_rate == 0)
+            av_dict_set_int(&recommended, "ab", av->bit_rate, 0);
+        }
+        if (av->sample_rate == 0) {
             av->sample_rate = 22050;
-        if (av->channels == 0)
+            av_dict_set_int(&recommended, "ar", av->sample_rate, 0);
+        }
+        if (av->channels == 0) {
             av->channels = 1;
+            av_dict_set_int(&recommended, "ac", av->channels, 0);
+        }
         break;
     case AVMEDIA_TYPE_VIDEO:
-        if (av->bit_rate == 0)
+        if (av->bit_rate == 0) {
             av->bit_rate = 64000;
+            av_dict_set_int(&recommended, "b", av->bit_rate, 0);
+        }
         if (av->time_base.num == 0){
             av->time_base.den = 5;
             av->time_base.num = 1;
+            av_dict_set(&recommended, "time_base", "1/5", 0);
         }
         if (av->width == 0 || av->height == 0) {
             av->width = 160;
             av->height = 128;
+            av_dict_set(&recommended, "video_size", "160x128", 0);
         }
         /* Bitrate tolerance is less for streaming */
-        if (av->bit_rate_tolerance == 0)
+        if (av->bit_rate_tolerance == 0) {
             av->bit_rate_tolerance = FFMAX(av->bit_rate / 4,
                       (int64_t)av->bit_rate*av->time_base.num/av->time_base.den);
-        if (av->qmin == 0)
+            av_dict_set_int(&recommended, "bt", av->bit_rate_tolerance, 0);
+        }
+        if (av->qmin == 0) {
             av->qmin = 3;
-        if (av->qmax == 0)
+            av_dict_set_int(&recommended, "qmin", av->qmin, 0);
+        }
+        if (av->qmax == 0) {
             av->qmax = 31;
-        if (av->max_qdiff == 0)
+            av_dict_set_int(&recommended, "qmax", av->qmax, 0);
+        }
+        if (av->max_qdiff == 0) {
             av->max_qdiff = 3;
+            av_dict_set_int(&recommended, "qdiff", av->max_qdiff, 0);
+        }
+        /*FIXME: 0.5 is a default for these two, it is a dead code */
         av->qcompress = 0.5;
+        av_dict_set(&recommended, "qcomp", "0.5", 0);
         av->qblur = 0.5;
+        av_dict_set(&recommended, "qblur", "0.5", 0);
 
-        if (!av->nsse_weight)
+        if (!av->nsse_weight) {
             av->nsse_weight = 8;
+            av_dict_set_int(&recommended, "nssew", av->nsse_weight, 0);
+        }
 
         av->frame_skip_cmp = FF_CMP_DCTMAX;
-        if (!av->me_method)
+        av_dict_set_int(&recommended, "skipcmp", FF_CMP_DCTMAX, 0);
+        if (!av->me_method) {
             av->me_method = ME_EPZS;
+            av_dict_set_int(&recommended, "me_method", ME_EPZS, 0);
+        }
 
         /* FIXME: rc_buffer_aggressivity and rc_eq are deprecated */
         av->rc_buffer_aggressivity = 1.0;
+        av_dict_set(&recommended, "rc_buf_aggressivity", "1.0", 0);
 
-        if (!av->rc_eq)
+        if (!av->rc_eq) {
             av->rc_eq = av_strdup("tex^qComp");
-        if (!av->i_quant_factor)
+            av_dict_set(&recommended, "rc_eq", "tex^qComp", 0);
+        }
+        if (!av->i_quant_factor) {
             av->i_quant_factor = -0.8;
-        if (!av->b_quant_factor)
+            av_dict_set(&recommended, "i_qfactor", "-0.8", 0);
+        }
+        if (!av->b_quant_factor) {
             av->b_quant_factor = 1.25;
-        if (!av->b_quant_offset)
+            av_dict_set(&recommended, "b_qfactor", "1.25", 0);
+        }
+        if (!av->b_quant_offset) {
             av->b_quant_offset = 1.25;
-        if (!av->rc_max_rate)
+            av_dict_set(&recommended, "b_qoffset", "1.25", 0);
+        }
+        if (!av->rc_max_rate) {
             av->rc_max_rate = av->bit_rate * 2;
+            av_dict_set_int(&recommended, "maxrate", av->rc_max_rate, 0);
+        }
 
         if (av->rc_max_rate && !av->rc_buffer_size) {
             av->rc_buffer_size = av->rc_max_rate;
+            av_dict_set_int(&recommended, "bufsize", av->rc_buffer_size, 0);
         }
-
-
         break;
     default:
         abort();
@@ -280,6 +318,9 @@ static void add_codec(FFServerStream *stream, AVCodecContext *av,
     st = av_mallocz(sizeof(AVStream));
     if (!st)
         return;
+    av_dict_get_string(recommended, &enc_config, '=', ',');
+    av_dict_free(&recommended);
+    av_stream_set_recommended_encoder_configuration(st, enc_config);
     st->codec = av;
     stream->streams[stream->nb_streams++] = st;
 }