af_amix: allow float planar sample format as input

libavfilter/af_amix.c

@@ -162,6 +162,7 @@ typedef struct MixContext {
 
     int nb_channels;            /**< number of channels */
     int sample_rate;            /**< sample rate */
+    int planar;
     AVAudioFifo **fifos;        /**< audio fifo for each input */
     uint8_t *input_state;       /**< current state of each input */
     float *input_scale;         /**< mixing scale factor for each input */
@@ -225,6 +226,7 @@ static int config_output(AVFilterLink *outlink)
     int i;
     char buf[64];
 
+    s->planar          = av_sample_fmt_is_planar(outlink->format);
     s->sample_rate     = outlink->sample_rate;
     outlink->time_base = (AVRational){ 1, outlink->sample_rate };
     s->next_pts        = AV_NOPTS_VALUE;
@@ -287,12 +289,20 @@ static int output_frame(AVFilterLink *outlink, int nb_samples)
 
     for (i = 0; i < s->nb_inputs; i++) {
         if (s->input_state[i] == INPUT_ON) {
+            int planes, plane_size, p;
+
             av_audio_fifo_read(s->fifos[i], (void **)in_buf->extended_data,
                                nb_samples);
-            s->fdsp.vector_fmac_scalar((float *)out_buf->extended_data[0],
-                                       (float *) in_buf->extended_data[0],
-                                       s->input_scale[i],
-                                       FFALIGN(nb_samples * s->nb_channels, 16));
+
+            planes     = s->planar ? s->nb_channels : 1;
+            plane_size = nb_samples * (s->planar ? 1 : s->nb_channels);
+            plane_size = FFALIGN(plane_size, 16);
+
+            for (p = 0; p < planes; p++) {
+                s->fdsp.vector_fmac_scalar((float *)out_buf->extended_data[p],
+                                           (float *) in_buf->extended_data[p],
+                                           s->input_scale[i], plane_size);
+            }
         }
     }
     avfilter_unref_buffer(in_buf);
@@ -523,6 +533,7 @@ static int query_formats(AVFilterContext *ctx)
 {
     AVFilterFormats *formats = NULL;
     ff_add_format(&formats, AV_SAMPLE_FMT_FLT);
+    ff_add_format(&formats, AV_SAMPLE_FMT_FLTP);
     ff_set_common_formats(ctx, formats);
     ff_set_common_channel_layouts(ctx, ff_all_channel_layouts());
     ff_set_common_samplerates(ctx, ff_all_samplerates());