lavfi: use avfilter_get_audio_buffer_ref_from_arrays() in avfilter_default_get_audio_buffer

libavfilter/defaults.c

@@ -61,78 +61,32 @@ AVFilterBufferRef *avfilter_default_get_audio_buffer(AVFilterLink *link, int per
                                                      enum AVSampleFormat sample_fmt, int nb_samples,
                                                      uint64_t channel_layout)
 {
-    AVFilterBuffer *samples = av_mallocz(sizeof(AVFilterBuffer));
-    AVFilterBufferRef *ref = NULL;
-    int i, sample_size, chans_nb, bufsize, per_channel_size, step_size = 0;
+    AVFilterBufferRef *samplesref = NULL;
+    uint8_t **data;
     int planar      = av_sample_fmt_is_planar(sample_fmt);
-    char *buf;
+    int nb_channels = av_get_channel_layout_nb_channels(channel_layout);
+    int planes      = planar ? nb_channels : 1;
+    int linesize;
 
-    if (!samples || !(ref = av_mallocz(sizeof(AVFilterBufferRef))))
+    if (!(data = av_mallocz(sizeof(*data) * planes)))
         goto fail;
 
-    ref->buf                   = samples;
-    ref->format                = sample_fmt;
-
-    ref->audio = av_mallocz(sizeof(AVFilterBufferRefAudioProps));
-    if (!ref->audio)
+    if (av_samples_alloc(data, &linesize, nb_channels, nb_samples, sample_fmt, 0) < 0)
         goto fail;
 
-    ref->audio->channel_layout = channel_layout;
-    ref->audio->nb_samples     = nb_samples;
-    ref->audio->planar         = planar;
-
-    /* make sure the buffer gets read permission or it's useless for output */
-    ref->perms = perms | AV_PERM_READ;
-
-    samples->refcount   = 1;
-    samples->free       = ff_avfilter_default_free_buffer;
-
-    sample_size = av_get_bytes_per_sample(sample_fmt);
-    chans_nb = av_get_channel_layout_nb_channels(channel_layout);
-
-    per_channel_size = nb_samples * sample_size;
-
-    /* Set the number of bytes to traverse to reach next sample of a particular channel:
-     * For planar, this is simply the sample size.
-     * For packed, this is the number of samples * sample_size.
-     */
-    for (i = 0; i < chans_nb; i++)
-        samples->linesize[i] = planar > 0 ? per_channel_size : sample_size;
-    memset(&samples->linesize[chans_nb], 0, (8-chans_nb) * sizeof(samples->linesize[0]));
-
-    /* Calculate total buffer size, round to multiple of 16 to be SIMD friendly */
-    bufsize = (nb_samples * chans_nb * sample_size + 15)&~15;
-    buf = av_malloc(bufsize);
-    if (!buf)
+    samplesref = avfilter_get_audio_buffer_ref_from_arrays(data, linesize, perms,
+                                                           nb_samples, sample_fmt,
+                                                           channel_layout);
+    if (!samplesref)
         goto fail;
 
-    /* For planar, set the start point of each channel's data within the buffer
-     * For packed, set the start point of the entire buffer only
-     */
-    samples->data[0] = buf;
-    if (buf && planar) {
-        for (i = 1; i < chans_nb; i++) {
-            step_size += per_channel_size;
-            samples->data[i] = buf + step_size;
-        }
-    } else {
-        for (i = 1; i < chans_nb; i++)
-            samples->data[i] = buf;
-    }
-
-    memset(&samples->data[chans_nb], 0, (8-chans_nb) * sizeof(samples->data[0]));
-
-    memcpy(ref->data,     samples->data,     sizeof(ref->data));
-    memcpy(ref->linesize, samples->linesize, sizeof(ref->linesize));
-
-    return ref;
+    av_freep(&data);
 
 fail:
-    if (ref)
-        av_free(ref->audio);
-    av_free(ref);
-    av_free(samples);
-    return NULL;
+    if (data)
+        av_freep(&data[0]);
+    av_freep(&data);
+    return samplesref;
 }
 
 void avfilter_default_start_frame(AVFilterLink *inlink, AVFilterBufferRef *picref)