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authorPaul B Mahol <onemda@gmail.com>2017-05-09 22:58:56 +0200
committerPaul B Mahol <onemda@gmail.com>2017-05-12 10:48:13 +0200
commiteaf644e120b3bc42c0fb702dfe9e79615cb4593a (patch)
tree69162d069eea55732a440d1579b8fada8f6f0b5e
parent6899e6e56065d9365963e02690dc9e2ce7866050 (diff)
downloadffmpeg-eaf644e120b3bc42c0fb702dfe9e79615cb4593a.tar.gz
avfilter: add acopy filter
Signed-off-by: Paul B Mahol <onemda@gmail.com>
-rw-r--r--doc/filters.texi7
-rw-r--r--libavfilter/Makefile1
-rw-r--r--libavfilter/af_acopy.c60
-rw-r--r--libavfilter/allfilters.c1
4 files changed, 68 insertions, 1 deletions
diff --git a/doc/filters.texi b/doc/filters.texi
index c54f5f2dcd..e1208d0f4a 100644
--- a/doc/filters.texi
+++ b/doc/filters.texi
@@ -395,6 +395,11 @@ How much to use compressed signal in output. Default is 1.
Range is between 0 and 1.
@end table
+@section acopy
+
+Copy the input audio source unchanged to the output. This is mainly useful for
+testing purposes.
+
@section acrossfade
Apply cross fade from one input audio stream to another input audio stream.
@@ -5665,7 +5670,7 @@ convolution="-2 -1 0 -1 1 1 0 1 2:-2 -1 0 -1 1 1 0 1 2:-2 -1 0 -1 1 1 0 1 2:-2 -
@section copy
-Copy the input source unchanged to the output. This is mainly useful for
+Copy the input video source unchanged to the output. This is mainly useful for
testing purposes.
@anchor{coreimage}
diff --git a/libavfilter/Makefile b/libavfilter/Makefile
index de5f992795..f7dfe8ad54 100644
--- a/libavfilter/Makefile
+++ b/libavfilter/Makefile
@@ -29,6 +29,7 @@ OBJS-$(HAVE_THREADS) += pthread.o
# audio filters
OBJS-$(CONFIG_ABENCH_FILTER) += f_bench.o
OBJS-$(CONFIG_ACOMPRESSOR_FILTER) += af_sidechaincompress.o
+OBJS-$(CONFIG_ACOPY_FILTER) += af_acopy.o
OBJS-$(CONFIG_ACROSSFADE_FILTER) += af_afade.o
OBJS-$(CONFIG_ACRUSHER_FILTER) += af_acrusher.o
OBJS-$(CONFIG_ADELAY_FILTER) += af_adelay.o
diff --git a/libavfilter/af_acopy.c b/libavfilter/af_acopy.c
new file mode 100644
index 0000000000..d849060966
--- /dev/null
+++ b/libavfilter/af_acopy.c
@@ -0,0 +1,60 @@
+/*
+ * This file is part of FFmpeg.
+ *
+ * FFmpeg is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * FFmpeg is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with FFmpeg; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#include "audio.h"
+#include "avfilter.h"
+#include "internal.h"
+
+static int filter_frame(AVFilterLink *inlink, AVFrame *in)
+{
+ AVFilterLink *outlink = inlink->dst->outputs[0];
+ AVFrame *out = ff_get_audio_buffer(outlink, in->nb_samples);
+
+ if (!out) {
+ av_frame_free(&in);
+ return AVERROR(ENOMEM);
+ }
+ av_frame_copy_props(out, in);
+ av_frame_copy(out, in);
+ av_frame_free(&in);
+ return ff_filter_frame(outlink, out);
+}
+
+static const AVFilterPad acopy_inputs[] = {
+ {
+ .name = "default",
+ .type = AVMEDIA_TYPE_AUDIO,
+ .filter_frame = filter_frame,
+ },
+ { NULL }
+};
+
+static const AVFilterPad acopy_outputs[] = {
+ {
+ .name = "default",
+ .type = AVMEDIA_TYPE_AUDIO,
+ },
+ { NULL }
+};
+
+AVFilter ff_af_acopy = {
+ .name = "acopy",
+ .description = NULL_IF_CONFIG_SMALL("Copy the input audio unchanged to the output."),
+ .inputs = acopy_inputs,
+ .outputs = acopy_outputs,
+};
diff --git a/libavfilter/allfilters.c b/libavfilter/allfilters.c
index 555c44250b..cd35ae4c9c 100644
--- a/libavfilter/allfilters.c
+++ b/libavfilter/allfilters.c
@@ -42,6 +42,7 @@ static void register_all(void)
{
REGISTER_FILTER(ABENCH, abench, af);
REGISTER_FILTER(ACOMPRESSOR, acompressor, af);
+ REGISTER_FILTER(ACOPY, acopy, af);
REGISTER_FILTER(ACROSSFADE, acrossfade, af);
REGISTER_FILTER(ACRUSHER, acrusher, af);
REGISTER_FILTER(ADELAY, adelay, af);