lavfi: connect libavresample options to af_resample via AVFilterGraph

1 files changed, 35 insertions, 0 deletions

diff --git a/libavfilter/af_resample.c b/libavfilter/af_resample.c
index c712b46d59..84ca8f5501 100644
--- a/libavfilter/af_resample.c
+++ b/libavfilter/af_resample.c
@@ -25,6 +25,7 @@
 #include "libavutil/avassert.h"
 #include "libavutil/avstring.h"
 #include "libavutil/common.h"
+#include "libavutil/dict.h"
 #include "libavutil/mathematics.h"
 #include "libavutil/opt.h"
 
@@ -37,6 +38,7 @@
 
 typedef struct ResampleContext {
     AVAudioResampleContext *avr;
+    AVDictionary *options;
 
     int64_t next_pts;
 
@@ -44,6 +46,29 @@ typedef struct ResampleContext {
     int got_output;
 } ResampleContext;
 
+static av_cold int init(AVFilterContext *ctx, const char *args)
+{
+    ResampleContext *s = ctx->priv;
+
+    if (args) {
+        int ret = av_dict_parse_string(&s->options, args, "=", ":", 0);
+        if (ret < 0) {
+            av_log(ctx, AV_LOG_ERROR, "error setting option string: %s\n", args);
+            return ret;
+        }
+
+        /* do not allow the user to override basic format options */
+        av_dict_set(&s->options,  "in_channel_layout", NULL, 0);
+        av_dict_set(&s->options, "out_channel_layout", NULL, 0);
+        av_dict_set(&s->options,  "in_sample_fmt",     NULL, 0);
+        av_dict_set(&s->options, "out_sample_fmt",     NULL, 0);
+        av_dict_set(&s->options,  "in_sample_rate",    NULL, 0);
+        av_dict_set(&s->options, "out_sample_rate",    NULL, 0);
+    }
+
+    return 0;
+}
+
 static av_cold void uninit(AVFilterContext *ctx)
 {
     ResampleContext *s = ctx->priv;
@@ -52,6 +77,7 @@ static av_cold void uninit(AVFilterContext *ctx)
         avresample_close(s->avr);
         avresample_free(&s->avr);
     }
+    av_dict_free(&s->options);
 }
 
 static int query_formats(AVFilterContext *ctx)
@@ -103,6 +129,14 @@ static int config_output(AVFilterLink *outlink)
     if (!(s->avr = avresample_alloc_context()))
         return AVERROR(ENOMEM);
 
+    if (s->options) {
+        AVDictionaryEntry *e = NULL;
+        while ((e = av_dict_get(s->options, "", e, AV_DICT_IGNORE_SUFFIX)))
+            av_log(ctx, AV_LOG_VERBOSE, "lavr option: %s=%s\n", e->key, e->value);
+
+        av_opt_set_dict(s->avr, &s->options);
+    }
+
     av_opt_set_int(s->avr,  "in_channel_layout", inlink ->channel_layout, 0);
     av_opt_set_int(s->avr, "out_channel_layout", outlink->channel_layout, 0);
     av_opt_set_int(s->avr,  "in_sample_fmt",     inlink ->format,         0);
@@ -264,6 +298,7 @@ AVFilter avfilter_af_resample = {
     .description   = NULL_IF_CONFIG_SMALL("Audio resampling and conversion."),
     .priv_size     = sizeof(ResampleContext),
 
+    .init           = init,
     .uninit         = uninit,
     .query_formats  = query_formats,