avfilter/avf_aphasemeter: make video output optional

Signed-off-by: Paul B Mahol <onemda@gmail.com>

1 files changed, 78 insertions, 39 deletions

diff --git a/libavfilter/avf_aphasemeter.c b/libavfilter/avf_aphasemeter.c
index 8e8b292a5f..fb5c1d4cdc 100644
--- a/libavfilter/avf_aphasemeter.c
+++ b/libavfilter/avf_aphasemeter.c
@@ -37,6 +37,7 @@
 typedef struct AudioPhaseMeterContext {
     const AVClass *class;
     AVFrame *out;
+    int do_video;
     int w, h;
     AVRational frame_rate;
     int contrast[4];
@@ -57,6 +58,7 @@ static const AVOption aphasemeter_options[] = {
     { "gc", "set green contrast", OFFSET(contrast[1]), AV_OPT_TYPE_INT, {.i64=7}, 0, 255, FLAGS },
     { "bc", "set blue contrast",  OFFSET(contrast[2]), AV_OPT_TYPE_INT, {.i64=1}, 0, 255, FLAGS },
     { "mpc", "set median phase color", OFFSET(mpc_str), AV_OPT_TYPE_STRING, {.str = "none"}, 0, 0, FLAGS },
+    { "video", "set video output", OFFSET(do_video), AV_OPT_TYPE_BOOL, {.i64 = 1}, 0, 1, FLAGS },
     { NULL }
 };
 
@@ -64,6 +66,7 @@ AVFILTER_DEFINE_CLASS(aphasemeter);
 
 static int query_formats(AVFilterContext *ctx)
 {
+    AudioPhaseMeterContext *s = ctx->priv;
     AVFilterFormats *formats = NULL;
     AVFilterChannelLayouts *layout = NULL;
     AVFilterLink *inlink = ctx->inputs[0];
@@ -74,17 +77,24 @@ static int query_formats(AVFilterContext *ctx)
 
     formats = ff_make_format_list(sample_fmts);
     if ((ret = ff_formats_ref         (formats, &inlink->out_formats        )) < 0 ||
+        (ret = ff_formats_ref         (formats, &outlink->in_formats        )) < 0 ||
         (ret = ff_add_channel_layout  (&layout, AV_CH_LAYOUT_STEREO         )) < 0 ||
-        (ret = ff_channel_layouts_ref (layout , &inlink->out_channel_layouts)) < 0)
+        (ret = ff_channel_layouts_ref (layout , &inlink->out_channel_layouts)) < 0 ||
+        (ret = ff_channel_layouts_ref (layout , &outlink->in_channel_layouts)) < 0)
         return ret;
 
     formats = ff_all_samplerates();
-    if ((ret = ff_formats_ref(formats, &inlink->out_samplerates)) < 0)
+    if ((ret = ff_formats_ref(formats, &inlink->out_samplerates)) < 0 ||
+        (ret = ff_formats_ref(formats, &outlink->in_samplerates)) < 0)
         return ret;
 
-    formats = ff_make_format_list(pix_fmts);
-    if ((ret = ff_formats_ref(formats, &outlink->in_formats)) < 0)
-        return ret;
+    if (s->do_video) {
+        AVFilterLink *outlink = ctx->outputs[1];
+
+        formats = ff_make_format_list(pix_fmts);
+        if ((ret = ff_formats_ref(formats, &outlink->in_formats)) < 0)
+            return ret;
+    }
 
     return 0;
 }
@@ -95,15 +105,17 @@ static int config_input(AVFilterLink *inlink)
     AudioPhaseMeterContext *s = ctx->priv;
     int nb_samples;
 
-    nb_samples = FFMAX(1024, ((double)inlink->sample_rate / av_q2d(s->frame_rate)) + 0.5);
-    inlink->partial_buf_size =
-    inlink->min_samples =
-    inlink->max_samples = nb_samples;
+    if (s->do_video) {
+        nb_samples = FFMAX(1024, ((double)inlink->sample_rate / av_q2d(s->frame_rate)) + 0.5);
+        inlink->partial_buf_size =
+        inlink->min_samples =
+        inlink->max_samples = nb_samples;
+    }
 
     return 0;
 }
 
-static int config_output(AVFilterLink *outlink)
+static int config_video_output(AVFilterLink *outlink)
 {
     AVFilterContext *ctx = outlink->src;
     AudioPhaseMeterContext *s = ctx->priv;
@@ -131,8 +143,9 @@ static inline int get_x(float phase, int w)
 static int filter_frame(AVFilterLink *inlink, AVFrame *in)
 {
     AVFilterContext *ctx = inlink->dst;
-    AVFilterLink *outlink = ctx->outputs[0];
     AudioPhaseMeterContext *s = ctx->priv;
+    AVFilterLink *outlink = s->do_video ? ctx->outputs[1] : NULL;
+    AVFilterLink *aoutlink = ctx->outputs[0];
     AVDictionary **metadata;
     const int rc = s->contrast[0];
     const int gc = s->contrast[1];
@@ -142,8 +155,8 @@ static int filter_frame(AVFilterLink *inlink, AVFrame *in)
     uint8_t *dst;
     int i;
 
-    if (!s->out || s->out->width  != outlink->w ||
-                   s->out->height != outlink->h) {
+    if (s->do_video && (!s->out || s->out->width  != outlink->w ||
+                                   s->out->height != outlink->h)) {
         av_frame_free(&s->out);
         s->out = ff_get_video_buffer(outlink, outlink->w, outlink->h);
         if (!s->out) {
@@ -154,7 +167,7 @@ static int filter_frame(AVFilterLink *inlink, AVFrame *in)
         out = s->out;
         for (i = 0; i < outlink->h; i++)
             memset(out->data[0] + i * out->linesize[0], 0, outlink->w * 4);
-    } else {
+    } else if (s->do_video) {
         out = s->out;
         for (i = outlink->h - 1; i >= 10; i--)
             memmove(out->data[0] + (i  ) * out->linesize[0],
@@ -163,7 +176,6 @@ static int filter_frame(AVFilterLink *inlink, AVFrame *in)
         for (i = 0; i < outlink->w; i++)
             AV_WL32(out->data[0] + i * 4, 0);
     }
-    s->out->pts = in->pts;
 
     for (i = 0; i < in->nb_samples; i++) {
         const float *src = (float *)in->data[0] + i * 2;
@@ -171,24 +183,28 @@ static int filter_frame(AVFilterLink *inlink, AVFrame *in)
         const float phase = isnan(f) ? 1 : f;
         const int x = get_x(phase, s->w);
 
-        dst = out->data[0] + x * 4;
-        dst[0] = FFMIN(255, dst[0] + rc);
-        dst[1] = FFMIN(255, dst[1] + gc);
-        dst[2] = FFMIN(255, dst[2] + bc);
-        dst[3] = 255;
+        if (s->do_video) {
+            dst = out->data[0] + x * 4;
+            dst[0] = FFMIN(255, dst[0] + rc);
+            dst[1] = FFMIN(255, dst[1] + gc);
+            dst[2] = FFMIN(255, dst[2] + bc);
+            dst[3] = 255;
+        }
         fphase += phase;
     }
     fphase /= in->nb_samples;
 
-    if (s->draw_median_phase) {
-        dst = out->data[0] + get_x(fphase, s->w) * 4;
-        AV_WL32(dst, AV_RL32(s->mpc));
-    }
+    if (s->do_video) {
+        if (s->draw_median_phase) {
+            dst = out->data[0] + get_x(fphase, s->w) * 4;
+            AV_WL32(dst, AV_RL32(s->mpc));
+        }
 
-    for (i = 1; i < 10 && i < outlink->h; i++)
-        memcpy(out->data[0] + i * out->linesize[0], out->data[0], outlink->w * 4);
+        for (i = 1; i < 10 && i < outlink->h; i++)
+            memcpy(out->data[0] + i * out->linesize[0], out->data[0], outlink->w * 4);
+    }
 
-    metadata = avpriv_frame_get_metadatap(out);
+    metadata = avpriv_frame_get_metadatap(in);
     if (metadata) {
         uint8_t value[128];
 
@@ -196,8 +212,11 @@ static int filter_frame(AVFilterLink *inlink, AVFrame *in)
         av_dict_set(metadata, "lavfi.aphasemeter.phase", value, 0);
     }
 
-    av_frame_free(&in);
-    return ff_filter_frame(outlink, av_frame_clone(s->out));
+    if (s->do_video) {
+        s->out->pts = in->pts;
+        ff_filter_frame(outlink, av_frame_clone(s->out));
+    }
+    return ff_filter_frame(aoutlink, in);
 }
 
 static av_cold void uninit(AVFilterContext *ctx)
@@ -207,6 +226,33 @@ static av_cold void uninit(AVFilterContext *ctx)
     av_frame_free(&s->out);
 }
 
+static av_cold int init(AVFilterContext *ctx)
+{
+    AudioPhaseMeterContext *s = ctx->priv;
+    AVFilterPad pad;
+
+    pad = (AVFilterPad){
+        .name         = av_strdup("out0"),
+        .type         = AVMEDIA_TYPE_AUDIO,
+    };
+    if (!pad.name)
+        return AVERROR(ENOMEM);
+    ff_insert_outpad(ctx, 0, &pad);
+
+    if (s->do_video) {
+        pad = (AVFilterPad){
+            .name         = av_strdup("out1"),
+            .type         = AVMEDIA_TYPE_VIDEO,
+            .config_props = config_video_output,
+        };
+        if (!pad.name)
+            return AVERROR(ENOMEM);
+        ff_insert_outpad(ctx, 1, &pad);
+    }
+
+    return 0;
+}
+
 static const AVFilterPad inputs[] = {
     {
         .name         = "default",
@@ -217,22 +263,15 @@ static const AVFilterPad inputs[] = {
     { NULL }
 };
 
-static const AVFilterPad outputs[] = {
-    {
-        .name         = "default",
-        .type         = AVMEDIA_TYPE_VIDEO,
-        .config_props = config_output,
-    },
-    { NULL }
-};
-
 AVFilter ff_avf_aphasemeter = {
     .name          = "aphasemeter",
     .description   = NULL_IF_CONFIG_SMALL("Convert input audio to phase meter video output."),
+    .init          = init,
     .uninit        = uninit,
     .query_formats = query_formats,
     .priv_size     = sizeof(AudioPhaseMeterContext),
     .inputs        = inputs,
-    .outputs       = outputs,
+    .outputs       = NULL,
     .priv_class    = &aphasemeter_class,
+    .flags         = AVFILTER_FLAG_DYNAMIC_OUTPUTS,
 };