Merge remote-tracking branch 'qatar/master'

* qatar/master:
  rtmp: Add a new option 'rtmp_buffer', for setting the client buffer time
  rtmp: Set the client buffer time to 3s instead of 0.26s
  rtmp: Handle server bandwidth packets
  rtmp: Display a verbose message when an unknown packet type is received
  lavfi/audio: use av_samples_copy() instead of custom code.
  configure: add all filters hardcoded into avconv to avconv_deps
  avfiltergraph: remove a redundant call to avfilter_get_by_name().
  lavfi: allow building without swscale.
  build: Do not delete tests/vsynth2 directory, which is no longer created.
  lavfi: replace AVFilterContext.input/output_count with nb_inputs/outputs
  lavfi: make AVFilterPad opaque after two major bumps.
  lavfi: add avfilter_pad_get_type() and avfilter_pad_get_name().
  lavfi: make avfilter_get_video_buffer() private on next bump.
  jack: update to new latency range API as the old one has been deprecated
  rtmp: Tokenize the AMF connection parameters manually instead of using strtok_r
  ppc: Rename H.264 optimization template file for consistency.
  lavfi: add channelsplit audio filter.
  golomb: check remaining bits during unary decoding in get_ur_golomb_jpegls()
  sws: fix planar RGB input conversions for 9/10/16 bpp.

Conflicts:
	Changelog
	configure
	doc/APIchanges
	ffmpeg.c
	libavcodec/golomb.h
	libavcodec/v210dec.h
	libavfilter/Makefile
	libavfilter/allfilters.c
	libavfilter/asrc_anullsrc.c
	libavfilter/audio.c
	libavfilter/avfilter.c
	libavfilter/avfilter.h
	libavfilter/avfiltergraph.c
	libavfilter/buffersrc.c
	libavfilter/formats.c
	libavfilter/version.h
	libavfilter/vf_frei0r.c
	libavfilter/vf_pad.c
	libavfilter/vf_scale.c
	libavfilter/video.h
	libavfilter/vsrc_color.c
	libavformat/rtmpproto.c
	libswscale/input.c
	tests/Makefile

Merged-by: Michael Niedermayer <michaelni@gmx.at>

53 files changed, 537 insertions, 141 deletions

diff --git a/libavfilter/Makefile b/libavfilter/Makefile
index 29345fc15e..95126a8b1d 100644
--- a/libavfilter/Makefile
+++ b/libavfilter/Makefile
@@ -1,9 +1,10 @@
 include $(SUBDIR)../config.mak
 
 NAME = avfilter
-FFLIBS = avutil swscale
+FFLIBS = avutil
 FFLIBS-$(CONFIG_ASYNCTS_FILTER) += avresample
 FFLIBS-$(CONFIG_RESAMPLE_FILTER) += avresample
+FFLIBS-$(CONFIG_SCALE_FILTER)   += swscale
 
 FFLIBS-$(CONFIG_ACONVERT_FILTER)             += swresample
 FFLIBS-$(CONFIG_AMOVIE_FILTER)               += avformat avcodec
@@ -54,6 +55,7 @@ OBJS-$(CONFIG_ASHOWINFO_FILTER)              += af_ashowinfo.o
 OBJS-$(CONFIG_ASPLIT_FILTER)                 += split.o
 OBJS-$(CONFIG_ASTREAMSYNC_FILTER)            += af_astreamsync.o
 OBJS-$(CONFIG_ASYNCTS_FILTER)                += af_asyncts.o
+OBJS-$(CONFIG_CHANNELSPLIT_FILTER)           += af_channelsplit.o
 OBJS-$(CONFIG_EARWAX_FILTER)                 += af_earwax.o
 OBJS-$(CONFIG_PAN_FILTER)                    += af_pan.o
 OBJS-$(CONFIG_RESAMPLE_FILTER)               += af_resample.o
@@ -102,6 +104,7 @@ OBJS-$(CONFIG_OVERLAY_FILTER)                += vf_overlay.o
 OBJS-$(CONFIG_PAD_FILTER)                    += vf_pad.o
 OBJS-$(CONFIG_PIXDESCTEST_FILTER)            += vf_pixdesctest.o
 OBJS-$(CONFIG_REMOVELOGO_FILTER)             += bbox.o lswsutils.o lavfutils.o vf_removelogo.o
+OBJS-$(CONFIG_SCALE_FILTER)                  += vf_scale.o
 OBJS-$(CONFIG_SELECT_FILTER)                 += vf_select.o
 OBJS-$(CONFIG_SETDAR_FILTER)                 += vf_aspect.o
 OBJS-$(CONFIG_SETFIELD_FILTER)               += vf_setfield.o
diff --git a/libavfilter/af_amerge.c b/libavfilter/af_amerge.c
index 3183fdcac9..95dd1ae479 100644
--- a/libavfilter/af_amerge.c
+++ b/libavfilter/af_amerge.c
@@ -118,7 +118,7 @@ static int query_formats(AVFilterContext *ctx)
                 if ((inlayout[i] >> c) & 1)
                     *(route[i]++) = out_ch_number++;
     }
-    formats = avfilter_make_format_list(ff_packed_sample_fmts);
+    formats = avfilter_make_format_list(ff_packed_sample_fmts_array);
     avfilter_set_common_sample_formats(ctx, formats);
     for (i = 0; i < am->nb_inputs; i++) {
         layouts = NULL;
diff --git a/libavfilter/af_amix.c b/libavfilter/af_amix.c
index 3fc2e8499a..003a8e8e62 100644
--- a/libavfilter/af_amix.c
+++ b/libavfilter/af_amix.c
@@ -454,10 +454,10 @@ static void filter_samples(AVFilterLink *inlink, AVFilterBufferRef *buf)
     AVFilterLink *outlink = ctx->outputs[0];
     int i;
 
-    for (i = 0; i < ctx->input_count; i++)
+    for (i = 0; i < ctx->nb_inputs; i++)
         if (ctx->inputs[i] == inlink)
             break;
-    if (i >= ctx->input_count) {
+    if (i >= ctx->nb_inputs) {
         av_log(ctx, AV_LOG_ERROR, "unknown input link\n");
         return;
     }
@@ -518,7 +518,7 @@ static void uninit(AVFilterContext *ctx)
     av_freep(&s->input_state);
     av_freep(&s->input_scale);
 
-    for (i = 0; i < ctx->input_count; i++)
+    for (i = 0; i < ctx->nb_inputs; i++)
         av_freep(&ctx->input_pads[i].name);
 }
 
diff --git a/libavfilter/af_anull.c b/libavfilter/af_anull.c
index c23c9d8005..81d1bf8a25 100644
--- a/libavfilter/af_anull.c
+++ b/libavfilter/af_anull.c
@@ -24,6 +24,7 @@
 
 #include "audio.h"
 #include "avfilter.h"
+#include "internal.h"
 
 AVFilter avfilter_af_anull = {
     .name      = "anull",
diff --git a/libavfilter/af_channelsplit.c b/libavfilter/af_channelsplit.c
new file mode 100644
index 0000000000..c9b31fa791
--- /dev/null
+++ b/libavfilter/af_channelsplit.c
@@ -0,0 +1,146 @@
+/*
+ * This file is part of Libav.
+ *
+ * Libav 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.
+ *
+ * Libav 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 Libav; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+/**
+ * @file
+ * Channel split filter
+ *
+ * Split an audio stream into per-channel streams.
+ */
+
+#include "libavutil/audioconvert.h"
+#include "libavutil/opt.h"
+
+#include "audio.h"
+#include "avfilter.h"
+#include "formats.h"
+#include "internal.h"
+
+typedef struct ChannelSplitContext {
+    const AVClass *class;
+
+    uint64_t channel_layout;
+    char    *channel_layout_str;
+} ChannelSplitContext;
+
+#define OFFSET(x) offsetof(ChannelSplitContext, x)
+#define A AV_OPT_FLAG_AUDIO_PARAM
+static const AVOption options[] = {
+    { "channel_layout", "Input channel layout.", OFFSET(channel_layout_str), AV_OPT_TYPE_STRING, { .str = "stereo" }, .flags = A },
+    { NULL },
+};
+
+static const AVClass channelsplit_class = {
+    .class_name = "channelsplit filter",
+    .item_name  = av_default_item_name,
+    .option     = options,
+    .version    = LIBAVUTIL_VERSION_INT,
+};
+
+static int init(AVFilterContext *ctx, const char *arg, void *opaque)
+{
+    ChannelSplitContext *s = ctx->priv;
+    int nb_channels;
+    int ret = 0, i;
+
+    s->class = &channelsplit_class;
+    av_opt_set_defaults(s);
+    if ((ret = av_set_options_string(s, arg, "=", ":")) < 0) {
+        av_log(ctx, AV_LOG_ERROR, "Error parsing options string '%s'.\n", arg);
+        return ret;
+    }
+    if (!(s->channel_layout = av_get_channel_layout(s->channel_layout_str))) {
+        av_log(ctx, AV_LOG_ERROR, "Error parsing channel layout '%s'.\n",
+               s->channel_layout_str);
+        ret = AVERROR(EINVAL);
+        goto fail;
+    }
+
+    nb_channels = av_get_channel_layout_nb_channels(s->channel_layout);
+    for (i = 0; i < nb_channels; i++) {
+        uint64_t channel = av_channel_layout_extract_channel(s->channel_layout, i);
+        AVFilterPad pad  = { 0 };
+
+        pad.type = AVMEDIA_TYPE_AUDIO;
+        pad.name = av_get_channel_name(channel);
+
+        ff_insert_outpad(ctx, i, &pad);
+    }
+
+fail:
+    av_opt_free(s);
+    return ret;
+}
+
+static int query_formats(AVFilterContext *ctx)
+{
+    ChannelSplitContext *s = ctx->priv;
+    AVFilterChannelLayouts *in_layouts = NULL;
+    int i;
+
+    ff_set_common_formats    (ctx, ff_planar_sample_fmts());
+    ff_set_common_samplerates(ctx, ff_all_samplerates());
+
+    ff_add_channel_layout(&in_layouts, s->channel_layout);
+    ff_channel_layouts_ref(in_layouts, &ctx->inputs[0]->out_channel_layouts);
+
+    for (i = 0; i < ctx->nb_outputs; i++) {
+        AVFilterChannelLayouts *out_layouts = NULL;
+        uint64_t channel = av_channel_layout_extract_channel(s->channel_layout, i);
+
+        ff_add_channel_layout(&out_layouts, channel);
+        ff_channel_layouts_ref(out_layouts, &ctx->outputs[i]->in_channel_layouts);
+    }
+
+    return 0;
+}
+
+static void filter_samples(AVFilterLink *inlink, AVFilterBufferRef *buf)
+{
+    AVFilterContext *ctx = inlink->dst;
+    int i;
+
+    for (i = 0; i < ctx->nb_outputs; i++) {
+        AVFilterBufferRef *buf_out = avfilter_ref_buffer(buf, ~AV_PERM_WRITE);
+
+        if (!buf_out)
+            return;
+
+        buf_out->data[0] = buf_out->extended_data[0] = buf_out->extended_data[i];
+        buf_out->audio->channel_layout =
+            av_channel_layout_extract_channel(buf->audio->channel_layout, i);
+
+        ff_filter_samples(ctx->outputs[i], buf_out);
+    }
+    avfilter_unref_buffer(buf);
+}
+
+AVFilter avfilter_af_channelsplit = {
+    .name           = "channelsplit",
+    .description    = NULL_IF_CONFIG_SMALL("Split audio into per-channel streams"),
+    .priv_size      = sizeof(ChannelSplitContext),
+
+    .init           = init,
+    .query_formats  = query_formats,
+
+    .inputs  = (const AVFilterPad[]){{ .name           = "default",
+                                       .type           = AVMEDIA_TYPE_AUDIO,
+                                       .filter_samples = filter_samples, },
+                                     { NULL }},
+    .outputs = (const AVFilterPad[]){{ NULL }},
+};
diff --git a/libavfilter/allfilters.c b/libavfilter/allfilters.c
index b9d44f2fdf..f8d6b389b4 100644
--- a/libavfilter/allfilters.c
+++ b/libavfilter/allfilters.c
@@ -44,6 +44,7 @@ void avfilter_register_all(void)
     REGISTER_FILTER (ASPLIT,      asplit,      af);
     REGISTER_FILTER (ASTREAMSYNC, astreamsync, af);
     REGISTER_FILTER (ASYNCTS,     asyncts,     af);
+    REGISTER_FILTER (CHANNELSPLIT,channelsplit,af);
     REGISTER_FILTER (EARWAX,      earwax,      af);
     REGISTER_FILTER (PAN,         pan,         af);
     REGISTER_FILTER (SILENCEDETECT, silencedetect, af);
@@ -92,6 +93,7 @@ void avfilter_register_all(void)
     REGISTER_FILTER (PAD,         pad,         vf);
     REGISTER_FILTER (PIXDESCTEST, pixdesctest, vf);
     REGISTER_FILTER (REMOVELOGO,  removelogo,  vf);
+    REGISTER_FILTER (SCALE,       scale,       vf);
     REGISTER_FILTER (SELECT,      select,      vf);
     REGISTER_FILTER (SETDAR,      setdar,      vf);
     REGISTER_FILTER (SETFIELD,    setfield,    vf);
@@ -143,8 +145,4 @@ void avfilter_register_all(void)
         extern AVFilter avfilter_asink_abuffer;
         avfilter_register(&avfilter_asink_abuffer);
     }
-    {
-        extern AVFilter avfilter_vf_scale;
-        avfilter_register(&avfilter_vf_scale);
-    }
 }
diff --git a/libavfilter/asink_anullsink.c b/libavfilter/asink_anullsink.c
index 6314840348..4349544b62 100644
--- a/libavfilter/asink_anullsink.c
+++ b/libavfilter/asink_anullsink.c
@@ -19,6 +19,7 @@
  */
 
 #include "avfilter.h"
+#include "internal.h"
 
 static void null_filter_samples(AVFilterLink *link, AVFilterBufferRef *samplesref) { }
 
diff --git a/libavfilter/asrc_anullsrc.c b/libavfilter/asrc_anullsrc.c
index 73932bd538..473c6b60e5 100644
--- a/libavfilter/asrc_anullsrc.c
+++ b/libavfilter/asrc_anullsrc.c
@@ -24,6 +24,7 @@
  * null audio source
  */
 
+#include "internal.h"
 #include "libavutil/audioconvert.h"
 #include "libavutil/opt.h"
 
diff --git a/libavfilter/audio.c b/libavfilter/audio.c
index 1334c2b7bc..d473b99393 100644
--- a/libavfilter/audio.c
+++ b/libavfilter/audio.c
@@ -160,7 +160,7 @@ void ff_default_filter_samples(AVFilterLink *inlink, AVFilterBufferRef *samplesr
 {
     AVFilterLink *outlink = NULL;
 
-    if (inlink->dst->output_count)
+    if (inlink->dst->nb_outputs)
         outlink = inlink->dst->outputs[0];
 
     if (outlink) {
@@ -190,10 +190,7 @@ void ff_filter_samples(AVFilterLink *link, AVFilterBufferRef *samplesref)
     /* prepare to copy the samples if the buffer has insufficient permissions */
     if ((dst->min_perms & samplesref->perms) != dst->min_perms ||
         dst->rej_perms & samplesref->perms) {
-        int  i, size, planar = av_sample_fmt_is_planar(samplesref->format);
-        int planes = !planar ? 1:
-                     av_get_channel_layout_nb_channels(samplesref->audio->channel_layout);
-
+        int size;
         av_log(link->dst, AV_LOG_DEBUG,
                "Copying audio data in avfilter (have perms %x, need %x, reject %x)\n",
                samplesref->perms, link->dstpad->min_perms, link->dstpad->rej_perms);
@@ -204,13 +201,10 @@ void ff_filter_samples(AVFilterLink *link, AVFilterBufferRef *samplesref)
         link->cur_buf->audio->sample_rate = samplesref->audio->sample_rate;
 
         /* Copy actual data into new samples buffer */
-        /* src can be larger than dst if it was allocated larger than necessary.
-           dst can be slightly larger due to extra alignment padding. */
-        size = FFMIN(samplesref->linesize[0], link->cur_buf->linesize[0]);
-        for (i = 0; samplesref->data[i] && i < 8; i++)
-            memcpy(link->cur_buf->data[i], samplesref->data[i], size);
-        for (i = 0; i < planes; i++)
-            memcpy(link->cur_buf->extended_data[i], samplesref->extended_data[i], size);
+        av_samples_copy(link->cur_buf->extended_data, samplesref->extended_data,
+                        0, 0, samplesref->audio->nb_samples,
+                        av_get_channel_layout_nb_channels(link->channel_layout),
+                        link->format);
 
         avfilter_unref_buffer(samplesref);
     } else
diff --git a/libavfilter/audio.h b/libavfilter/audio.h
index b63f85f45c..e361edc5f8 100644
--- a/libavfilter/audio.h
+++ b/libavfilter/audio.h
@@ -24,7 +24,7 @@
 
 #include "avfilter.h"
 
-static const enum AVSampleFormat ff_packed_sample_fmts[] = {
+static const enum AVSampleFormat ff_packed_sample_fmts_array[] = {
     AV_SAMPLE_FMT_U8,
     AV_SAMPLE_FMT_S16,
     AV_SAMPLE_FMT_S32,
@@ -33,7 +33,7 @@ static const enum AVSampleFormat ff_packed_sample_fmts[] = {
     AV_SAMPLE_FMT_NONE
 };
 
-static const enum AVSampleFormat ff_planar_sample_fmts[] = {
+static const enum AVSampleFormat ff_planar_sample_fmts_array[] = {
     AV_SAMPLE_FMT_U8P,
     AV_SAMPLE_FMT_S16P,
     AV_SAMPLE_FMT_S32P,
diff --git a/libavfilter/avfilter.c b/libavfilter/avfilter.c
index f79c7129df..6c2aaa3549 100644
--- a/libavfilter/avfilter.c
+++ b/libavfilter/avfilter.c
@@ -120,8 +120,8 @@ int avfilter_link(AVFilterContext *src, unsigned srcpad,
 {
     AVFilterLink *link;
 
-    if (src->output_count <= srcpad || dst->input_count <= dstpad ||
-        src->outputs[srcpad]        || dst->inputs[dstpad])
+    if (src->nb_outputs <= srcpad || dst->nb_inputs <= dstpad ||
+        src->outputs[srcpad]      || dst->inputs[dstpad])
         return -1;
 
     if (src->output_pads[srcpad].type != dst->input_pads[dstpad].type) {
@@ -200,9 +200,9 @@ int avfilter_config_links(AVFilterContext *filter)
     unsigned i;
     int ret;
 
-    for (i = 0; i < filter->input_count; i ++) {
+    for (i = 0; i < filter->nb_inputs; i ++) {
         AVFilterLink *link = filter->inputs[i];
-        AVFilterLink *inlink = link->src->input_count ?
+        AVFilterLink *inlink = link->src->nb_inputs ?
             link->src->inputs[0] : NULL;
 
         if (!link) continue;
@@ -222,7 +222,7 @@ int avfilter_config_links(AVFilterContext *filter)
                 return ret;
 
             if (!(config_link = link->srcpad->config_props)) {
-                if (link->src->input_count != 1) {
+                if (link->src->nb_inputs != 1) {
                     av_log(link->src, AV_LOG_ERROR, "Source filters and filters "
                                                     "with more than one input "
                                                     "must set config_props() "
@@ -335,7 +335,7 @@ int ff_poll_frame(AVFilterLink *link)
     if (link->srcpad->poll_frame)
         return link->srcpad->poll_frame(link);
 
-    for (i = 0; i < link->src->input_count; i++) {
+    for (i = 0; i < link->src->nb_inputs; i++) {
         int val;
         if (!link->src->inputs[i])
             return -1;
@@ -450,27 +450,31 @@ int avfilter_open(AVFilterContext **filter_ctx, AVFilter *filter, const char *in
             goto err;
     }
 
-    ret->input_count  = pad_count(filter->inputs);
-    if (ret->input_count) {
-        ret->input_pads   = av_malloc(sizeof(AVFilterPad) * ret->input_count);
+    ret->nb_inputs = pad_count(filter->inputs);
+    if (ret->nb_inputs ) {
+        ret->input_pads   = av_malloc(sizeof(AVFilterPad) * ret->nb_inputs);
         if (!ret->input_pads)
             goto err;
-        memcpy(ret->input_pads, filter->inputs, sizeof(AVFilterPad) * ret->input_count);
-        ret->inputs       = av_mallocz(sizeof(AVFilterLink*) * ret->input_count);
+        memcpy(ret->input_pads, filter->inputs, sizeof(AVFilterPad) * ret->nb_inputs);
+        ret->inputs       = av_mallocz(sizeof(AVFilterLink*) * ret->nb_inputs);
         if (!ret->inputs)
             goto err;
     }
 
-    ret->output_count = pad_count(filter->outputs);
-    if (ret->output_count) {
-        ret->output_pads  = av_malloc(sizeof(AVFilterPad) * ret->output_count);
+    ret->nb_outputs = pad_count(filter->outputs);
+    if (ret->nb_outputs) {
+        ret->output_pads  = av_malloc(sizeof(AVFilterPad) * ret->nb_outputs);
         if (!ret->output_pads)
             goto err;
-        memcpy(ret->output_pads, filter->outputs, sizeof(AVFilterPad) * ret->output_count);
-        ret->outputs      = av_mallocz(sizeof(AVFilterLink*) * ret->output_count);
+        memcpy(ret->output_pads, filter->outputs, sizeof(AVFilterPad) * ret->nb_outputs);
+        ret->outputs      = av_mallocz(sizeof(AVFilterLink*) * ret->nb_outputs);
         if (!ret->outputs)
             goto err;
     }
+#if FF_API_FOO_COUNT
+    ret->output_count = ret->nb_outputs;
+    ret->input_count  = ret->nb_inputs;
+#endif
 
     *filter_ctx = ret;
     return 0;
@@ -478,10 +482,10 @@ int avfilter_open(AVFilterContext **filter_ctx, AVFilter *filter, const char *in
 err:
     av_freep(&ret->inputs);
     av_freep(&ret->input_pads);
-    ret->input_count = 0;
+    ret->nb_inputs = 0;
     av_freep(&ret->outputs);
     av_freep(&ret->output_pads);
-    ret->output_count = 0;
+    ret->nb_outputs = 0;
     av_freep(&ret->priv);
     av_free(ret);
     return AVERROR(ENOMEM);
@@ -498,7 +502,7 @@ void avfilter_free(AVFilterContext *filter)
     if (filter->filter->uninit)
         filter->filter->uninit(filter);
 
-    for (i = 0; i < filter->input_count; i++) {
+    for (i = 0; i < filter->nb_inputs; i++) {
         if ((link = filter->inputs[i])) {
             if (link->src)
                 link->src->outputs[link->srcpad - link->src->output_pads] = NULL;
@@ -511,7 +515,7 @@ void avfilter_free(AVFilterContext *filter)
         }
         avfilter_link_free(&link);
     }
-    for (i = 0; i < filter->output_count; i++) {
+    for (i = 0; i < filter->nb_outputs; i++) {
         if ((link = filter->outputs[i])) {
             if (link->dst)
                 link->dst->inputs[link->dstpad - link->dst->input_pads] = NULL;
@@ -546,6 +550,16 @@ int avfilter_init_filter(AVFilterContext *filter, const char *args, void *opaque
     return ret;
 }
 
+const char *avfilter_pad_get_name(AVFilterPad *pads, int pad_idx)
+{
+    return pads[pad_idx].name;
+}
+
+enum AVMediaType avfilter_pad_get_type(AVFilterPad *pads, int pad_idx)
+{
+    return pads[pad_idx].type;
+}
+
 #if FF_API_DEFAULT_CONFIG_OUTPUT_LINK
 void avfilter_insert_pad(unsigned idx, unsigned *count, size_t padidx_off,
                          AVFilterPad **pads, AVFilterLink ***links,
@@ -556,14 +570,20 @@ void avfilter_insert_pad(unsigned idx, unsigned *count, size_t padidx_off,
 void avfilter_insert_inpad(AVFilterContext *f, unsigned index,
                            AVFilterPad *p)
 {
-    ff_insert_pad(index, &f->input_count, offsetof(AVFilterLink, dstpad),
+    ff_insert_pad(index, &f->nb_inputs, offsetof(AVFilterLink, dstpad),
                   &f->input_pads, &f->inputs, p);
+#if FF_API_FOO_COUNT
+    f->input_count = f->nb_inputs;
+#endif
 }
 void avfilter_insert_outpad(AVFilterContext *f, unsigned index,
                             AVFilterPad *p)
 {
-    ff_insert_pad(index, &f->output_count, offsetof(AVFilterLink, srcpad),
+    ff_insert_pad(index, &f->nb_outputs, offsetof(AVFilterLink, srcpad),
                   &f->output_pads, &f->outputs, p);
+#if FF_API_FOO_COUNT
+    f->output_count = f->nb_outputs;
+#endif
 }
 int avfilter_poll_frame(AVFilterLink *link)
 {
diff --git a/libavfilter/avfilter.h b/libavfilter/avfilter.h
index 955550eb1e..3c7af2d83d 100644
--- a/libavfilter/avfilter.h
+++ b/libavfilter/avfilter.h
@@ -369,10 +369,16 @@ void avfilter_set_common_packing_formats(AVFilterContext *ctx, AVFilterFormats *
  */
 #endif
 
+#if FF_API_AVFILTERPAD_PUBLIC
 /**
  * A filter pad used for either input or output.
  *
  * See doc/filter_design.txt for details on how to implement the methods.
+ *
+ * @warning this struct might be removed from public API.
+ * users should call avfilter_pad_get_name() and avfilter_pad_get_type()
+ * to access the name and type fields; there should be no need to access
+ * any other fields from outside of libavfilter.
  */
 struct AVFilterPad {
     /**
@@ -499,6 +505,29 @@ struct AVFilterPad {
      */
     int (*config_props)(AVFilterLink *link);
 };
+#endif
+
+/**
+ * Get the name of an AVFilterPad.
+ *
+ * @param pads an array of AVFilterPads
+ * @param pad_idx index of the pad in the array it; is the caller's
+ *                responsibility to ensure the index is valid
+ *
+ * @return name of the pad_idx'th pad in pads
+ */
+const char *avfilter_pad_get_name(AVFilterPad *pads, int pad_idx);
+
+/**
+ * Get the type of an AVFilterPad.
+ *
+ * @param pads an array of AVFilterPads
+ * @param pad_idx index of the pad in the array; it is the caller's
+ *                responsibility to ensure the index is valid
+ *
+ * @return type of the pad_idx'th pad in pads
+ */
+enum AVMediaType avfilter_pad_get_type(AVFilterPad *pads, int pad_idx);
 
 #if FF_API_FILTERS_PUBLIC
 /** default handler for start_frame() for video inputs */
@@ -608,16 +637,23 @@ struct AVFilterContext {
 
     char *name;                     ///< name of this filter instance
 
-    unsigned input_count;           ///< number of input pads
+#if FF_API_FOO_COUNT
+    unsigned input_count;           ///< @deprecated use nb_inputs
+#endif
     AVFilterPad   *input_pads;      ///< array of input pads
     AVFilterLink **inputs;          ///< array of pointers to input links
 
-    unsigned output_count;          ///< number of output pads
+#if FF_API_FOO_COUNT
+    unsigned output_count;          ///< @deprecated use nb_outputs
+#endif
     AVFilterPad   *output_pads;     ///< array of output pads
     AVFilterLink **outputs;         ///< array of pointers to output links
 
     void *priv;                     ///< private data for use by the filter
 
+    unsigned nb_inputs;             ///< number of input pads
+    unsigned nb_outputs;            ///< number of output pads
+
     struct AVFilterCommand *command_queue;
 };
 
@@ -777,19 +813,11 @@ void avfilter_link_free(AVFilterLink **link);
  */
 int avfilter_config_links(AVFilterContext *filter);
 
-/**
- * Request a picture buffer with a specific set of permissions.
- *
- * @param link  the output link to the filter from which the buffer will
- *              be requested
- * @param perms the required access permissions
- * @param w     the minimum width of the buffer to allocate
- * @param h     the minimum height of the buffer to allocate
- * @return      A reference to the buffer. This must be unreferenced with
- *              avfilter_unref_buffer when you are finished with it.
- */
+#if FF_API_FILTERS_PUBLIC
+attribute_deprecated
 AVFilterBufferRef *avfilter_get_video_buffer(AVFilterLink *link, int perms,
                                           int w, int h);
+#endif
 
 /**
  * Create a buffer reference wrapped around an already allocated image
diff --git a/libavfilter/avfiltergraph.c b/libavfilter/avfiltergraph.c
index 09bbe106cf..0f363b28e9 100644
--- a/libavfilter/avfiltergraph.c
+++ b/libavfilter/avfiltergraph.c
@@ -118,7 +118,7 @@ static int graph_check_validity(AVFilterGraph *graph, AVClass *log_ctx)
     for (i = 0; i < graph->filter_count; i++) {
         filt = graph->filters[i];
 
-        for (j = 0; j < filt->input_count; j++) {
+        for (j = 0; j < filt->nb_inputs; j++) {
             if (!filt->inputs[j] || !filt->inputs[j]->src) {
                 av_log(log_ctx, AV_LOG_ERROR,
                        "Input pad \"%s\" for the filter \"%s\" of type \"%s\" not connected to any source\n",
@@ -127,7 +127,7 @@ static int graph_check_validity(AVFilterGraph *graph, AVClass *log_ctx)
             }
         }
 
-        for (j = 0; j < filt->output_count; j++) {
+        for (j = 0; j < filt->nb_outputs; j++) {
             if (!filt->outputs[j] || !filt->outputs[j]->dst) {
                 av_log(log_ctx, AV_LOG_ERROR,
                        "Output pad \"%s\" for the filter \"%s\" of type \"%s\" not connected to any destination\n",
@@ -153,7 +153,7 @@ static int graph_config_links(AVFilterGraph *graph, AVClass *log_ctx)
     for (i=0; i < graph->filter_count; i++) {
         filt = graph->filters[i];
 
-        if (!filt->output_count) {
+        if (!filt->nb_outputs) {
             if ((ret = avfilter_config_links(filt)))
                 return ret;
         }
@@ -271,7 +271,7 @@ static int query_formats(AVFilterGraph *graph, AVClass *log_ctx)
         /* Call query_formats on sources first.
            This is a temporary workaround for amerge,
            until format renegociation is implemented. */
-        if (!graph->filters[i]->input_count == j)
+        if (!graph->filters[i]->nb_inputs == j)
             continue;
         if (graph->filters[i]->filter->query_formats)
             ret = filter_query_formats(graph->filters[i]);
@@ -286,7 +286,7 @@ static int query_formats(AVFilterGraph *graph, AVClass *log_ctx)
     for (i = 0; i < graph->filter_count; i++) {
         AVFilterContext *filter = graph->filters[i];
 
-        for (j = 0; j < filter->input_count; j++) {
+        for (j = 0; j < filter->nb_inputs; j++) {
             AVFilterLink *link = filter->inputs[j];
 #if 0
             if (!link) continue;
@@ -348,11 +348,16 @@ static int query_formats(AVFilterGraph *graph, AVClass *log_ctx)
                 /* couldn't merge format lists. auto-insert conversion filter */
                 switch (link->type) {
                 case AVMEDIA_TYPE_VIDEO:
+                    if (!(filter = avfilter_get_by_name("scale"))) {
+                        av_log(log_ctx, AV_LOG_ERROR, "'scale' filter "
+                               "not present, cannot convert pixel formats.\n");
+                        return AVERROR(EINVAL);
+                    }
+
                     snprintf(inst_name, sizeof(inst_name), "auto-inserted scaler %d",
                              scaler_count++);
                     snprintf(scale_args, sizeof(scale_args), "0:0:%s", graph->scale_sws_opts);
-                    if ((ret = avfilter_graph_create_filter(&convert,
-                                                            avfilter_get_by_name("scale"),
+                    if ((ret = avfilter_graph_create_filter(&convert, filter,
                                                             inst_name, scale_args, NULL,
                                                             graph)) < 0)
                         return ret;
@@ -366,8 +371,7 @@ static int query_formats(AVFilterGraph *graph, AVClass *log_ctx)
 
                     snprintf(inst_name, sizeof(inst_name), "auto-inserted resampler %d",
                              resampler_count++);
-                    if ((ret = avfilter_graph_create_filter(&convert,
-                                                            avfilter_get_by_name("aresample"),
+                    if ((ret = avfilter_graph_create_filter(&convert, filter,
                                                             inst_name, NULL, NULL, graph)) < 0)
                         return ret;
                     break;
@@ -464,7 +468,7 @@ static int pick_format(AVFilterLink *link, AVFilterLink *ref)
 
 #define REDUCE_FORMATS(fmt_type, list_type, list, var, nb, add_format) \
 do {                                                                   \
-    for (i = 0; i < filter->input_count; i++) {                        \
+    for (i = 0; i < filter->nb_inputs; i++) {                          \
         AVFilterLink *link = filter->inputs[i];                        \
         fmt_type fmt;                                                  \
                                                                        \
@@ -472,7 +476,7 @@ do {                                                                   \
             continue;                                                  \
         fmt = link->out_ ## list->var[0];                              \
                                                                        \
-        for (j = 0; j < filter->output_count; j++) {                   \
+        for (j = 0; j < filter->nb_outputs; j++) {                     \
             AVFilterLink *out_link = filter->outputs[j];               \
             list_type *fmts;                                           \
                                                                        \
@@ -529,19 +533,19 @@ static void swap_samplerates_on_filter(AVFilterContext *filter)
     int sample_rate;
     int i, j;
 
-    for (i = 0; i < filter->input_count; i++) {
+    for (i = 0; i < filter->nb_inputs; i++) {
         link = filter->inputs[i];
 
         if (link->type == AVMEDIA_TYPE_AUDIO &&
             link->out_samplerates->format_count == 1)
             break;
     }
-    if (i == filter->input_count)
+    if (i == filter->nb_inputs)
         return;
 
     sample_rate = link->out_samplerates->formats[0];
 
-    for (i = 0; i < filter->output_count; i++) {
+    for (i = 0; i < filter->nb_outputs; i++) {
         AVFilterLink *outlink = filter->outputs[i];
         int best_idx, best_diff = INT_MAX;
 
@@ -576,19 +580,19 @@ static void swap_channel_layouts_on_filter(AVFilterContext *filter)
     uint64_t chlayout;
     int i, j;
 
-    for (i = 0; i < filter->input_count; i++) {
+    for (i = 0; i < filter->nb_inputs; i++) {
         link = filter->inputs[i];
 
         if (link->type == AVMEDIA_TYPE_AUDIO &&
             link->out_channel_layouts->nb_channel_layouts == 1)
             break;
     }
-    if (i == filter->input_count)
+    if (i == filter->nb_inputs)
         return;
 
     chlayout = link->out_channel_layouts->channel_layouts[0];
 
-    for (i = 0; i < filter->output_count; i++) {
+    for (i = 0; i < filter->nb_outputs; i++) {
         AVFilterLink *outlink = filter->outputs[i];
         int best_idx, best_score = INT_MIN;
 
@@ -629,20 +633,20 @@ static void swap_sample_fmts_on_filter(AVFilterContext *filter)
     int format, bps;
     int i, j;
 
-    for (i = 0; i < filter->input_count; i++) {
+    for (i = 0; i < filter->nb_inputs; i++) {
         link = filter->inputs[i];
 
         if (link->type == AVMEDIA_TYPE_AUDIO &&
             link->out_formats->format_count == 1)
             break;
     }
-    if (i == filter->input_count)
+    if (i == filter->nb_inputs)
         return;
 
     format = link->out_formats->formats[0];
     bps    = av_get_bytes_per_sample(format);
 
-    for (i = 0; i < filter->output_count; i++) {
+    for (i = 0; i < filter->nb_outputs; i++) {
         AVFilterLink *outlink = filter->outputs[i];
         int best_idx, best_score = INT_MIN;
 
@@ -700,24 +704,24 @@ static int pick_formats(AVFilterGraph *graph)
         change = 0;
         for (i = 0; i < graph->filter_count; i++) {
             AVFilterContext *filter = graph->filters[i];
-            if (filter->input_count){
-                for (j = 0; j < filter->input_count; j++){
+            if (filter->nb_inputs){
+                for (j = 0; j < filter->nb_inputs; j++){
                     if(filter->inputs[j]->in_formats && filter->inputs[j]->in_formats->format_count == 1) {
                         pick_format(filter->inputs[j], NULL);
                         change = 1;
                     }
                 }
             }
-            if (filter->output_count){
-                for (j = 0; j < filter->output_count; j++){
+            if (filter->nb_outputs){
+                for (j = 0; j < filter->nb_outputs; j++){
                     if(filter->outputs[j]->in_formats && filter->outputs[j]->in_formats->format_count == 1) {
                         pick_format(filter->outputs[j], NULL);
                         change = 1;
                     }
                 }
             }
-            if (filter->input_count && filter->output_count && filter->inputs[0]->format>=0) {
-                for (j = 0; j < filter->output_count; j++) {
+            if (filter->nb_inputs && filter->nb_outputs && filter->inputs[0]->format>=0) {
+                for (j = 0; j < filter->nb_outputs; j++) {
                     if(filter->outputs[j]->format<0) {
                         pick_format(filter->outputs[j], filter->inputs[0]);
                         change = 1;
@@ -730,10 +734,10 @@ static int pick_formats(AVFilterGraph *graph)
     for (i = 0; i < graph->filter_count; i++) {
         AVFilterContext *filter = graph->filters[i];
 
-        for (j = 0; j < filter->input_count; j++)
+        for (j = 0; j < filter->nb_inputs; j++)
             if ((ret = pick_format(filter->inputs[j], NULL)) < 0)
                 return ret;
-        for (j = 0; j < filter->output_count; j++)
+        for (j = 0; j < filter->nb_outputs; j++)
             if ((ret = pick_format(filter->outputs[j], NULL)) < 0)
                 return ret;
     }
@@ -778,18 +782,18 @@ static int ff_avfilter_graph_config_pointers(AVFilterGraph *graph,
 
     for (i = 0; i < graph->filter_count; i++) {
         f = graph->filters[i];
-        for (j = 0; j < f->input_count; j++) {
+        for (j = 0; j < f->nb_inputs; j++) {
             f->inputs[j]->graph     = graph;
             f->inputs[j]->age_index = -1;
         }
-        for (j = 0; j < f->output_count; j++) {
+        for (j = 0; j < f->nb_outputs; j++) {
             f->outputs[j]->graph    = graph;
             f->outputs[j]->age_index= -1;
         }
-        if (!f->output_count) {
-            if (f->input_count > INT_MAX - sink_links_count)
+        if (!f->nb_outputs) {
+            if (f->nb_inputs > INT_MAX - sink_links_count)
                 return AVERROR(EINVAL);
-            sink_links_count += f->input_count;
+            sink_links_count += f->nb_inputs;
         }
     }
     sinks = av_calloc(sink_links_count, sizeof(*sinks));
@@ -797,8 +801,8 @@ static int ff_avfilter_graph_config_pointers(AVFilterGraph *graph,
         return AVERROR(ENOMEM);
     for (i = 0; i < graph->filter_count; i++) {
         f = graph->filters[i];
-        if (!f->output_count) {
-            for (j = 0; j < f->input_count; j++) {
+        if (!f->nb_outputs) {
+            for (j = 0; j < f->nb_inputs; j++) {
                 sinks[n] = f->inputs[j];
                 f->inputs[j]->age_index = n++;
             }
diff --git a/libavfilter/buffersrc.c b/libavfilter/buffersrc.c
index b339dd79f5..b50a5e1715 100644
--- a/libavfilter/buffersrc.c
+++ b/libavfilter/buffersrc.c
@@ -84,7 +84,7 @@ static AVFilterBufferRef *copy_buffer_ref(AVFilterContext *ctx,
     switch (outlink->type) {
 
     case AVMEDIA_TYPE_VIDEO:
-        buf = avfilter_get_video_buffer(outlink, AV_PERM_WRITE,
+        buf = ff_get_video_buffer(outlink, AV_PERM_WRITE,
                                         ref->video->w, ref->video->h);
         if(!buf)
             return NULL;
diff --git a/libavfilter/formats.c b/libavfilter/formats.c
index 930ed16f5a..0b1ef30d22 100644
--- a/libavfilter/formats.c
+++ b/libavfilter/formats.c
@@ -303,6 +303,18 @@ AVFilterFormats *avfilter_make_all_packing_formats(void)
 }
 #endif
 
+AVFilterFormats *ff_planar_sample_fmts(void)
+{
+    AVFilterFormats *ret = NULL;
+    int fmt;
+
+    for (fmt = 0; fmt < AV_SAMPLE_FMT_NB; fmt++)
+        if (av_sample_fmt_is_planar(fmt))
+            ff_add_format(&ret, fmt);
+
+    return ret;
+}
+
 AVFilterFormats *ff_all_samplerates(void)
 {
     AVFilterFormats *ret = av_mallocz(sizeof(*ret));
@@ -401,13 +413,13 @@ void ff_formats_changeref(AVFilterFormats **oldref, AVFilterFormats **newref)
 {                                                                   \
     int count = 0, i;                                               \
                                                                     \
-    for (i = 0; i < ctx->input_count; i++) {                        \
+    for (i = 0; i < ctx->nb_inputs; i++) {                          \
         if (ctx->inputs[i] && !ctx->inputs[i]->out_fmts) {          \
             ref(fmts, &ctx->inputs[i]->out_fmts);                   \
             count++;                                                \
         }                                                           \
     }                                                               \
-    for (i = 0; i < ctx->output_count; i++) {                       \
+    for (i = 0; i < ctx->nb_outputs; i++) {                         \
         if (ctx->outputs[i] && !ctx->outputs[i]->in_fmts) {         \
             ref(fmts, &ctx->outputs[i]->in_fmts);                   \
             count++;                                                \
diff --git a/libavfilter/formats.h b/libavfilter/formats.h
index 7e16733b74..4cbfb74074 100644
--- a/libavfilter/formats.h
+++ b/libavfilter/formats.h
@@ -163,6 +163,11 @@ int ff_add_format(AVFilterFormats **avff, int64_t fmt);
 AVFilterFormats *ff_all_formats(enum AVMediaType type);
 
 /**
+ * Construct a formats list containing all planar sample formats.
+ */
+AVFilterFormats *ff_planar_sample_fmts(void);
+
+/**
  * Return a format list which contains the intersection of the formats of
  * a and b. Also, all the references of a, all the references of b, and
  * a and b themselves will be deallocated.
diff --git a/libavfilter/graphparser.c b/libavfilter/graphparser.c
index 3f23977474..ba5d9b05a2 100644
--- a/libavfilter/graphparser.c
+++ b/libavfilter/graphparser.c
@@ -226,7 +226,7 @@ static int link_filter_inouts(AVFilterContext *filt_ctx,
 {
     int pad, ret;
 
-    for (pad = 0; pad < filt_ctx->input_count; pad++) {
+    for (pad = 0; pad < filt_ctx->nb_inputs; pad++) {
         AVFilterInOut *p = *curr_inputs;
 
         if (p) {
@@ -254,7 +254,7 @@ static int link_filter_inouts(AVFilterContext *filt_ctx,
         return AVERROR(EINVAL);
     }
 
-    pad = filt_ctx->output_count;
+    pad = filt_ctx->nb_outputs;
     while (pad--) {
         AVFilterInOut *currlinkn = av_mallocz(sizeof(AVFilterInOut));
         if (!currlinkn)
diff --git a/libavfilter/internal.h b/libavfilter/internal.h
index 997b85f3c4..7e5cc1ac5e 100644
--- a/libavfilter/internal.h
+++ b/libavfilter/internal.h
@@ -50,6 +50,132 @@ typedef struct AVFilterCommand {
  */
 void ff_avfilter_graph_update_heap(AVFilterGraph *graph, AVFilterLink *link);
 
+#if !FF_API_AVFILTERPAD_PUBLIC
+/**
+ * A filter pad used for either input or output.
+ */
+struct AVFilterPad {
+    /**
+     * Pad name. The name is unique among inputs and among outputs, but an
+     * input may have the same name as an output. This may be NULL if this
+     * pad has no need to ever be referenced by name.
+     */
+    const char *name;
+
+    /**
+     * AVFilterPad type.
+     */
+    enum AVMediaType type;
+
+    /**
+     * Minimum required permissions on incoming buffers. Any buffer with
+     * insufficient permissions will be automatically copied by the filter
+     * system to a new buffer which provides the needed access permissions.
+     *
+     * Input pads only.
+     */
+    int min_perms;
+
+    /**
+     * Permissions which are not accepted on incoming buffers. Any buffer
+     * which has any of these permissions set will be automatically copied
+     * by the filter system to a new buffer which does not have those
+     * permissions. This can be used to easily disallow buffers with
+     * AV_PERM_REUSE.
+     *
+     * Input pads only.
+     */
+    int rej_perms;
+
+    /**
+     * Callback called before passing the first slice of a new frame. If
+     * NULL, the filter layer will default to storing a reference to the
+     * picture inside the link structure.
+     *
+     * Input video pads only.
+     */
+    void (*start_frame)(AVFilterLink *link, AVFilterBufferRef *picref);
+
+    /**
+     * Callback function to get a video buffer. If NULL, the filter system will
+     * use avfilter_default_get_video_buffer().
+     *
+     * Input video pads only.
+     */
+    AVFilterBufferRef *(*get_video_buffer)(AVFilterLink *link, int perms, int w, int h);
+
+    /**
+     * Callback function to get an audio buffer. If NULL, the filter system will
+     * use avfilter_default_get_audio_buffer().
+     *
+     * Input audio pads only.
+     */
+    AVFilterBufferRef *(*get_audio_buffer)(AVFilterLink *link, int perms,
+                                           int nb_samples);
+
+    /**
+     * Callback called after the slices of a frame are completely sent. If
+     * NULL, the filter layer will default to releasing the reference stored
+     * in the link structure during start_frame().
+     *
+     * Input video pads only.
+     */
+    void (*end_frame)(AVFilterLink *link);
+
+    /**
+     * Slice drawing callback. This is where a filter receives video data
+     * and should do its processing.
+     *
+     * Input video pads only.
+     */
+    void (*draw_slice)(AVFilterLink *link, int y, int height, int slice_dir);
+
+    /**
+     * Samples filtering callback. This is where a filter receives audio data
+     * and should do its processing.
+     *
+     * Input audio pads only.
+     */
+    void (*filter_samples)(AVFilterLink *link, AVFilterBufferRef *samplesref);
+
+    /**
+     * Frame poll callback. This returns the number of immediately available
+     * samples. It should return a positive value if the next request_frame()
+     * is guaranteed to return one frame (with no delay).
+     *
+     * Defaults to just calling the source poll_frame() method.
+     *
+     * Output pads only.
+     */
+    int (*poll_frame)(AVFilterLink *link);
+
+    /**
+     * Frame request callback. A call to this should result in at least one
+     * frame being output over the given link. This should return zero on
+     * success, and another value on error.
+     *
+     * Output pads only.
+     */
+    int (*request_frame)(AVFilterLink *link);
+
+    /**
+     * Link configuration callback.
+     *
+     * For output pads, this should set the link properties such as
+     * width/height. This should NOT set the format property - that is
+     * negotiated between filters by the filter system using the
+     * query_formats() callback before this function is called.
+     *
+     * For input pads, this should check the properties of the link, and update
+     * the filter's internal state as necessary.
+     *
+     * For both input and output filters, this should return zero on success,
+     * and another value on error.
+     */
+    int (*config_props)(AVFilterLink *link);
+};
+#endif
+
 /** default handler for freeing audio/video buffer when there are no references left */
 void ff_avfilter_default_free_buffer(AVFilterBuffer *buf);
 
@@ -165,16 +291,22 @@ void ff_insert_pad(unsigned idx, unsigned *count, size_t padidx_off,
 static inline void ff_insert_inpad(AVFilterContext *f, unsigned index,
                                    AVFilterPad *p)
 {
-    ff_insert_pad(index, &f->input_count, offsetof(AVFilterLink, dstpad),
+    ff_insert_pad(index, &f->nb_inputs, offsetof(AVFilterLink, dstpad),
                   &f->input_pads, &f->inputs, p);
+#if FF_API_FOO_COUNT
+    f->input_count = f->nb_inputs;
+#endif
 }
 
 /** Insert a new output pad for the filter. */
 static inline void ff_insert_outpad(AVFilterContext *f, unsigned index,
                                     AVFilterPad *p)
 {
-    ff_insert_pad(index, &f->output_count, offsetof(AVFilterLink, srcpad),
+    ff_insert_pad(index, &f->nb_outputs, offsetof(AVFilterLink, srcpad),
                   &f->output_pads, &f->outputs, p);
+#if FF_API_FOO_COUNT
+    f->output_count = f->nb_outputs;
+#endif
 }
 
 /**
diff --git a/libavfilter/split.c b/libavfilter/split.c
index b7d8b87e68..899fe3ea7b 100644
--- a/libavfilter/split.c
+++ b/libavfilter/split.c
@@ -59,7 +59,7 @@ static void split_uninit(AVFilterContext *ctx)
 {
     int i;
 
-    for (i = 0; i < ctx->output_count; i++)
+    for (i = 0; i < ctx->nb_outputs; i++)
         av_freep(&ctx->output_pads[i].name);
 }
 
@@ -68,7 +68,7 @@ static void start_frame(AVFilterLink *inlink, AVFilterBufferRef *picref)
     AVFilterContext *ctx = inlink->dst;
     int i;
 
-    for (i = 0; i < ctx->output_count; i++)
+    for (i = 0; i < ctx->nb_outputs; i++)
         ff_start_frame(ctx->outputs[i],
                        avfilter_ref_buffer(picref, ~AV_PERM_WRITE));
 }
@@ -78,7 +78,7 @@ static void draw_slice(AVFilterLink *inlink, int y, int h, int slice_dir)
     AVFilterContext *ctx = inlink->dst;
     int i;
 
-    for (i = 0; i < ctx->output_count; i++)
+    for (i = 0; i < ctx->nb_outputs; i++)
         ff_draw_slice(ctx->outputs[i], y, h, slice_dir);
 }
 
@@ -87,7 +87,7 @@ static void end_frame(AVFilterLink *inlink)
     AVFilterContext *ctx = inlink->dst;
     int i;
 
-    for (i = 0; i < ctx->output_count; i++)
+    for (i = 0; i < ctx->nb_outputs; i++)
         ff_end_frame(ctx->outputs[i]);
 
     avfilter_unref_buffer(inlink->cur_buf);
@@ -115,7 +115,7 @@ static void filter_samples(AVFilterLink *inlink, AVFilterBufferRef *samplesref)
     AVFilterContext *ctx = inlink->dst;
     int i;
 
-    for (i = 0; i < ctx->output_count; i++)
+    for (i = 0; i < ctx->nb_outputs; i++)
         ff_filter_samples(inlink->dst->outputs[i],
                           avfilter_ref_buffer(samplesref, ~AV_PERM_WRITE));
 }
diff --git a/libavfilter/src_movie.c b/libavfilter/src_movie.c
index 354d67c941..eea2db3e8c 100644
--- a/libavfilter/src_movie.c
+++ b/libavfilter/src_movie.c
@@ -39,6 +39,7 @@
 #include "avcodec.h"
 #include "avfilter.h"
 #include "formats.h"
+#include "internal.h"
 #include "video.h"
 
 typedef struct {
@@ -272,8 +273,8 @@ static int movie_get_frame(AVFilterLink *outlink)
 
             if (frame_decoded) {
                 /* FIXME: avoid the memcpy */
-                movie->picref = avfilter_get_video_buffer(outlink, AV_PERM_WRITE | AV_PERM_PRESERVE |
-                                                          AV_PERM_REUSE2, outlink->w, outlink->h);
+                movie->picref = ff_get_video_buffer(outlink, AV_PERM_WRITE | AV_PERM_PRESERVE |
+                                                    AV_PERM_REUSE2, outlink->w, outlink->h);
                 av_image_copy(movie->picref->data, movie->picref->linesize,
                               (void*)movie->frame->data,  movie->frame->linesize,
                               movie->picref->format, outlink->w, outlink->h);
diff --git a/libavfilter/version.h b/libavfilter/version.h
index c90b4ad43a..3ebea25e07 100644
--- a/libavfilter/version.h
+++ b/libavfilter/version.h
@@ -29,8 +29,8 @@
 #include "libavutil/avutil.h"
 
 #define LIBAVFILTER_VERSION_MAJOR  2
-#define LIBAVFILTER_VERSION_MINOR 78
-#define LIBAVFILTER_VERSION_MICRO 101
+#define LIBAVFILTER_VERSION_MINOR 79
+#define LIBAVFILTER_VERSION_MICRO 100
 
 #define LIBAVFILTER_VERSION_INT AV_VERSION_INT(LIBAVFILTER_VERSION_MAJOR, \
                                                LIBAVFILTER_VERSION_MINOR, \
@@ -62,5 +62,11 @@
 #ifndef FF_API_FILTERS_PUBLIC
 #define FF_API_FILTERS_PUBLIC               (LIBAVFILTER_VERSION_MAJOR < 3)
 #endif
+#ifndef FF_API_AVFILTERPAD_PUBLIC
+#define FF_API_AVFILTERPAD_PUBLIC           (LIBAVFILTER_VERSION_MAJOR < 4)
+#endif
+#ifndef FF_API_FOO_COUNT
+#define FF_API_FOO_COUNT                    (LIBAVFILTER_VERSION_MAJOR < 4)
+#endif
 
 #endif // AVFILTER_VERSION_H
diff --git a/libavfilter/vf_aspect.c b/libavfilter/vf_aspect.c
index 179ef292b7..e7f431f746 100644
--- a/libavfilter/vf_aspect.c
+++ b/libavfilter/vf_aspect.c
@@ -26,6 +26,7 @@
 #include "libavutil/mathematics.h"
 #include "libavutil/parseutils.h"
 #include "avfilter.h"
+#include "internal.h"
 #include "video.h"
 
 typedef struct {
diff --git a/libavfilter/vf_blackframe.c b/libavfilter/vf_blackframe.c
index 4a415b0e38..b37bc035c7 100644
--- a/libavfilter/vf_blackframe.c
+++ b/libavfilter/vf_blackframe.c
@@ -30,6 +30,7 @@
 #include "avfilter.h"
 #include "internal.h"
 #include "formats.h"
+#include "internal.h"
 #include "video.h"
 
 typedef struct {
diff --git a/libavfilter/vf_boxblur.c b/libavfilter/vf_boxblur.c
index d8aa764d9a..7bab9bd67a 100644
--- a/libavfilter/vf_boxblur.c
+++ b/libavfilter/vf_boxblur.c
@@ -30,6 +30,7 @@
 #include "libavutil/pixdesc.h"
 #include "avfilter.h"
 #include "formats.h"
+#include "internal.h"
 #include "video.h"
 
 static const char *const var_names[] = {
diff --git a/libavfilter/vf_copy.c b/libavfilter/vf_copy.c
index 8f128efc5b..111d315de6 100644
--- a/libavfilter/vf_copy.c
+++ b/libavfilter/vf_copy.c
@@ -22,6 +22,7 @@
  */
 
 #include "avfilter.h"
+#include "internal.h"
 #include "video.h"
 
 AVFilter avfilter_vf_copy = {
diff --git a/libavfilter/vf_crop.c b/libavfilter/vf_crop.c
index 48af9c8127..db18b2b842 100644
--- a/libavfilter/vf_crop.c
+++ b/libavfilter/vf_crop.c
@@ -27,6 +27,7 @@
 
 #include "avfilter.h"
 #include "formats.h"
+#include "internal.h"
 #include "video.h"
 #include "libavutil/eval.h"
 #include "libavutil/avstring.h"
diff --git a/libavfilter/vf_cropdetect.c b/libavfilter/vf_cropdetect.c
index ed5d04eea8..fdb99e9719 100644
--- a/libavfilter/vf_cropdetect.c
+++ b/libavfilter/vf_cropdetect.c
@@ -26,6 +26,7 @@
 #include "libavutil/imgutils.h"
 #include "avfilter.h"
 #include "formats.h"
+#include "internal.h"
 #include "video.h"
 
 typedef struct {
diff --git a/libavfilter/vf_delogo.c b/libavfilter/vf_delogo.c
index 2949d7e931..f52b896a9c 100644
--- a/libavfilter/vf_delogo.c
+++ b/libavfilter/vf_delogo.c
@@ -30,6 +30,7 @@
 #include "libavutil/pixdesc.h"
 #include "avfilter.h"
 #include "formats.h"
+#include "internal.h"
 #include "video.h"
 
 /**
@@ -218,8 +219,8 @@ static void start_frame(AVFilterLink *inlink, AVFilterBufferRef *inpicref)
     AVFilterBufferRef *outpicref;
 
     if (inpicref->perms & AV_PERM_PRESERVE) {
-        outpicref = avfilter_get_video_buffer(outlink, AV_PERM_WRITE,
-                                              outlink->w, outlink->h);
+        outpicref = ff_get_video_buffer(outlink, AV_PERM_WRITE,
+                                        outlink->w, outlink->h);
         avfilter_copy_buffer_ref_props(outpicref, inpicref);
         outpicref->video->w = outlink->w;
         outpicref->video->h = outlink->h;
diff --git a/libavfilter/vf_drawbox.c b/libavfilter/vf_drawbox.c
index c792faf5b4..42ee07514a 100644
--- a/libavfilter/vf_drawbox.c
+++ b/libavfilter/vf_drawbox.c
@@ -29,6 +29,7 @@
 #include "libavutil/parseutils.h"
 #include "avfilter.h"
 #include "formats.h"
+#include "internal.h"
 #include "video.h"
 
 enum { Y, U, V, A };
diff --git a/libavfilter/vf_drawtext.c b/libavfilter/vf_drawtext.c
index ce290edb69..1754b2a48c 100644
--- a/libavfilter/vf_drawtext.c
+++ b/libavfilter/vf_drawtext.c
@@ -42,6 +42,7 @@
 #include "avfilter.h"
 #include "drawutils.h"
 #include "formats.h"
+#include "internal.h"
 #include "video.h"
 
 #undef time
diff --git a/libavfilter/vf_fade.c b/libavfilter/vf_fade.c
index 8ff5af9f3b..ed27a5310f 100644
--- a/libavfilter/vf_fade.c
+++ b/libavfilter/vf_fade.c
@@ -33,6 +33,7 @@
 #include "drawutils.h"
 #include "internal.h"
 #include "formats.h"
+#include "internal.h"
 #include "video.h"
 
 #define R 0
diff --git a/libavfilter/vf_fieldorder.c b/libavfilter/vf_fieldorder.c
index 24c23e219e..0f8df15b1a 100644
--- a/libavfilter/vf_fieldorder.c
+++ b/libavfilter/vf_fieldorder.c
@@ -29,6 +29,7 @@
 #include "libavutil/pixdesc.h"
 #include "avfilter.h"
 #include "formats.h"
+#include "internal.h"
 #include "video.h"
 
 typedef struct
@@ -112,7 +113,7 @@ static AVFilterBufferRef *get_video_buffer(AVFilterLink *inlink, int perms, int
     AVFilterContext   *ctx        = inlink->dst;
     AVFilterLink      *outlink    = ctx->outputs[0];
 
-    return avfilter_get_video_buffer(outlink, perms, w, h);
+    return ff_get_video_buffer(outlink, perms, w, h);
 }
 
 static void start_frame(AVFilterLink *inlink, AVFilterBufferRef *inpicref)
diff --git a/libavfilter/vf_format.c b/libavfilter/vf_format.c
index 665ec2f423..cc0e142971 100644
--- a/libavfilter/vf_format.c
+++ b/libavfilter/vf_format.c
@@ -27,6 +27,7 @@
 #include "avfilter.h"
 #include "internal.h"
 #include "formats.h"
+#include "internal.h"
 #include "video.h"
 
 typedef struct {
diff --git a/libavfilter/vf_frei0r.c b/libavfilter/vf_frei0r.c
index e3dbf06e45..17ee54c19d 100644
--- a/libavfilter/vf_frei0r.c
+++ b/libavfilter/vf_frei0r.c
@@ -32,6 +32,7 @@
 #include "libavutil/parseutils.h"
 #include "avfilter.h"
 #include "formats.h"
+#include "internal.h"
 #include "video.h"
 
 typedef f0r_instance_t (*f0r_construct_f)(unsigned int width, unsigned int height);
@@ -433,7 +434,7 @@ static int source_config_props(AVFilterLink *outlink)
 static int source_request_frame(AVFilterLink *outlink)
 {
     Frei0rContext *frei0r = outlink->src->priv;
-    AVFilterBufferRef *picref = avfilter_get_video_buffer(outlink, AV_PERM_WRITE, outlink->w, outlink->h);
+    AVFilterBufferRef *picref = ff_get_video_buffer(outlink, AV_PERM_WRITE, outlink->w, outlink->h);
     picref->video->sample_aspect_ratio = (AVRational) {1, 1};
     picref->pts = frei0r->pts++;
     picref->pos = -1;
diff --git a/libavfilter/vf_gradfun.c b/libavfilter/vf_gradfun.c
index 1b3a32933d..e863d32ed2 100644
--- a/libavfilter/vf_gradfun.c
+++ b/libavfilter/vf_gradfun.c
@@ -38,6 +38,7 @@
 #include "avfilter.h"
 #include "formats.h"
 #include "gradfun.h"
+#include "internal.h"
 #include "video.h"
 
 DECLARE_ALIGNED(16, static const uint16_t, dither)[8][8] = {
@@ -190,7 +191,7 @@ static void start_frame(AVFilterLink *inlink, AVFilterBufferRef *inpicref)
     AVFilterBufferRef *outpicref;
 
     if (inpicref->perms & AV_PERM_PRESERVE) {
-        outpicref = avfilter_get_video_buffer(outlink, AV_PERM_WRITE, outlink->w, outlink->h);
+        outpicref = ff_get_video_buffer(outlink, AV_PERM_WRITE, outlink->w, outlink->h);
         avfilter_copy_buffer_ref_props(outpicref, inpicref);
         outpicref->video->w = outlink->w;
         outpicref->video->h = outlink->h;
diff --git a/libavfilter/vf_hflip.c b/libavfilter/vf_hflip.c
index b32992f34c..bfc83f2fda 100644
--- a/libavfilter/vf_hflip.c
+++ b/libavfilter/vf_hflip.c
@@ -26,6 +26,7 @@
 
 #include "avfilter.h"
 #include "formats.h"
+#include "internal.h"
 #include "video.h"
 #include "libavutil/pixdesc.h"
 #include "libavutil/intreadwrite.h"
diff --git a/libavfilter/vf_hqdn3d.c b/libavfilter/vf_hqdn3d.c
index 1d6ca78415..17d0b115a5 100644
--- a/libavfilter/vf_hqdn3d.c
+++ b/libavfilter/vf_hqdn3d.c
@@ -28,6 +28,7 @@
 #include "libavutil/pixdesc.h"
 #include "avfilter.h"
 #include "formats.h"
+#include "internal.h"
 #include "video.h"
 
 typedef struct {
diff --git a/libavfilter/vf_null.c b/libavfilter/vf_null.c
index b98f3efc64..935c92a1d0 100644
--- a/libavfilter/vf_null.c
+++ b/libavfilter/vf_null.c
@@ -22,6 +22,7 @@
  */
 
 #include "avfilter.h"
+#include "internal.h"
 #include "video.h"
 
 AVFilter avfilter_vf_null = {
diff --git a/libavfilter/vf_overlay.c b/libavfilter/vf_overlay.c
index 5bcd7afb2c..2c2275e718 100644
--- a/libavfilter/vf_overlay.c
+++ b/libavfilter/vf_overlay.c
@@ -303,7 +303,7 @@ static int config_output(AVFilterLink *outlink)
 
 static AVFilterBufferRef *get_video_buffer(AVFilterLink *link, int perms, int w, int h)
 {
-    return avfilter_get_video_buffer(link->dst->outputs[0], perms, w, h);
+    return ff_get_video_buffer(link->dst->outputs[0], perms, w, h);
 }
 
 // divide by 255 and round to nearest
diff --git a/libavfilter/vf_pad.c b/libavfilter/vf_pad.c
index 31702b7318..413fde1f6c 100644
--- a/libavfilter/vf_pad.c
+++ b/libavfilter/vf_pad.c
@@ -26,6 +26,7 @@
 
 #include "avfilter.h"
 #include "formats.h"
+#include "internal.h"
 #include "video.h"
 #include "libavutil/avstring.h"
 #include "libavutil/eval.h"
@@ -220,9 +221,9 @@ static AVFilterBufferRef *get_video_buffer(AVFilterLink *inlink, int perms, int
     PadContext *pad = inlink->dst->priv;
     int align = (perms&AV_PERM_ALIGN) ? AVFILTER_ALIGN : 1;
 
-    AVFilterBufferRef *picref = avfilter_get_video_buffer(inlink->dst->outputs[0], perms,
-                                                       w + (pad->w - pad->in_w) + 4*align,
-                                                       h + (pad->h - pad->in_h));
+    AVFilterBufferRef *picref = ff_get_video_buffer(inlink->dst->outputs[0], perms,
+                                                    w + (pad->w - pad->in_w) + 4*align,
+                                                    h + (pad->h - pad->in_h));
     int plane;
 
     picref->video->w = w;
@@ -287,9 +288,9 @@ static void start_frame(AVFilterLink *inlink, AVFilterBufferRef *inpicref)
     if(pad->needs_copy){
         av_log(inlink->dst, AV_LOG_DEBUG, "Direct padding impossible allocating new frame\n");
         avfilter_unref_buffer(outpicref);
-        outpicref = avfilter_get_video_buffer(inlink->dst->outputs[0], AV_PERM_WRITE | AV_PERM_NEG_LINESIZES,
-                                                       FFMAX(inlink->w, pad->w),
-                                                       FFMAX(inlink->h, pad->h));
+        outpicref = ff_get_video_buffer(inlink->dst->outputs[0], AV_PERM_WRITE | AV_PERM_NEG_LINESIZES,
+                                        FFMAX(inlink->w, pad->w),
+                                        FFMAX(inlink->h, pad->h));
         avfilter_copy_buffer_ref_props(outpicref, inpicref);
     }
 
diff --git a/libavfilter/vf_pixdesctest.c b/libavfilter/vf_pixdesctest.c
index 9b7b373ecd..73ae255bca 100644
--- a/libavfilter/vf_pixdesctest.c
+++ b/libavfilter/vf_pixdesctest.c
@@ -25,6 +25,7 @@
 
 #include "libavutil/pixdesc.h"
 #include "avfilter.h"
+#include "internal.h"
 #include "video.h"
 
 typedef struct {
@@ -57,8 +58,8 @@ static void start_frame(AVFilterLink *inlink, AVFilterBufferRef *picref)
     AVFilterBufferRef *outpicref;
     int i;
 
-    outlink->out_buf = avfilter_get_video_buffer(outlink, AV_PERM_WRITE,
-                                                outlink->w, outlink->h);
+    outlink->out_buf = ff_get_video_buffer(outlink, AV_PERM_WRITE,
+                                           outlink->w, outlink->h);
     outpicref = outlink->out_buf;
     avfilter_copy_buffer_ref_props(outpicref, picref);
 
diff --git a/libavfilter/vf_scale.c b/libavfilter/vf_scale.c
index fab0568d9a..184de0fe15 100644
--- a/libavfilter/vf_scale.c
+++ b/libavfilter/vf_scale.c
@@ -25,6 +25,7 @@
 
 #include "avfilter.h"
 #include "formats.h"
+#include "internal.h"
 #include "video.h"
 #include "libavutil/avstring.h"
 #include "libavutil/eval.h"
@@ -302,7 +303,7 @@ static void start_frame(AVFilterLink *link, AVFilterBufferRef *picref)
     scale->hsub = av_pix_fmt_descriptors[link->format].log2_chroma_w;
     scale->vsub = av_pix_fmt_descriptors[link->format].log2_chroma_h;
 
-    outpicref = avfilter_get_video_buffer(outlink, AV_PERM_WRITE|AV_PERM_ALIGN, outlink->w, outlink->h);
+    outpicref = ff_get_video_buffer(outlink, AV_PERM_WRITE|AV_PERM_ALIGN, outlink->w, outlink->h);
     avfilter_copy_buffer_ref_props(outpicref, picref);
     outpicref->video->w = outlink->w;
     outpicref->video->h = outlink->h;
diff --git a/libavfilter/vf_setpts.c b/libavfilter/vf_setpts.c
index e1f773483b..d73e77b57d 100644
--- a/libavfilter/vf_setpts.c
+++ b/libavfilter/vf_setpts.c
@@ -29,6 +29,7 @@
 #include "libavutil/eval.h"
 #include "libavutil/mathematics.h"
 #include "avfilter.h"
+#include "internal.h"
 #include "video.h"
 
 static const char *const var_names[] = {
diff --git a/libavfilter/vf_slicify.c b/libavfilter/vf_slicify.c
index 76d2b237bd..1af3239dbe 100644
--- a/libavfilter/vf_slicify.c
+++ b/libavfilter/vf_slicify.c
@@ -24,6 +24,7 @@
  */
 
 #include "avfilter.h"
+#include "internal.h"
 #include "video.h"
 #include "libavutil/pixdesc.h"
 
diff --git a/libavfilter/vf_transpose.c b/libavfilter/vf_transpose.c
index 3ac07f5870..512a5300d8 100644
--- a/libavfilter/vf_transpose.c
+++ b/libavfilter/vf_transpose.c
@@ -30,6 +30,7 @@
 #include "libavutil/imgutils.h"
 #include "avfilter.h"
 #include "formats.h"
+#include "internal.h"
 #include "video.h"
 
 typedef struct {
@@ -117,8 +118,8 @@ static void start_frame(AVFilterLink *inlink, AVFilterBufferRef *picref)
 {
     AVFilterLink *outlink = inlink->dst->outputs[0];
 
-    outlink->out_buf = avfilter_get_video_buffer(outlink, AV_PERM_WRITE,
-                                                 outlink->w, outlink->h);
+    outlink->out_buf = ff_get_video_buffer(outlink, AV_PERM_WRITE,
+                                           outlink->w, outlink->h);
     outlink->out_buf->pts = picref->pts;
 
     if (picref->video->sample_aspect_ratio.num == 0) {
diff --git a/libavfilter/vf_unsharp.c b/libavfilter/vf_unsharp.c
index a280a0df7f..13f4157c3e 100644
--- a/libavfilter/vf_unsharp.c
+++ b/libavfilter/vf_unsharp.c
@@ -38,6 +38,7 @@
 
 #include "avfilter.h"
 #include "formats.h"
+#include "internal.h"
 #include "video.h"
 #include "libavutil/common.h"
 #include "libavutil/mem.h"
diff --git a/libavfilter/vf_vflip.c b/libavfilter/vf_vflip.c
index 2c8436ff20..6fd5d863a3 100644
--- a/libavfilter/vf_vflip.c
+++ b/libavfilter/vf_vflip.c
@@ -25,6 +25,7 @@
 
 #include "libavutil/pixdesc.h"
 #include "avfilter.h"
+#include "internal.h"
 #include "video.h"
 
 typedef struct {
@@ -50,7 +51,7 @@ static AVFilterBufferRef *get_video_buffer(AVFilterLink *link, int perms,
     if (!(perms & AV_PERM_NEG_LINESIZES))
         return ff_default_get_video_buffer(link, perms, w, h);
 
-    picref = avfilter_get_video_buffer(link->dst->outputs[0], perms, w, h);
+    picref = ff_get_video_buffer(link->dst->outputs[0], perms, w, h);
     for (i = 0; i < 4; i ++) {
         int vsub = i == 1 || i == 2 ? flip->vsub : 0;
 
diff --git a/libavfilter/vf_yadif.c b/libavfilter/vf_yadif.c
index a0a5e05526..336f18def3 100644
--- a/libavfilter/vf_yadif.c
+++ b/libavfilter/vf_yadif.c
@@ -207,8 +207,8 @@ static void return_frame(AVFilterContext *ctx, int is_second)
     }
 
     if (is_second) {
-        yadif->out = avfilter_get_video_buffer(link, AV_PERM_WRITE | AV_PERM_PRESERVE |
-                                               AV_PERM_REUSE, link->w, link->h);
+        yadif->out = ff_get_video_buffer(link, AV_PERM_WRITE | AV_PERM_PRESERVE |
+                                         AV_PERM_REUSE, link->w, link->h);
         avfilter_copy_buffer_ref_props(yadif->out, yadif->cur);
         yadif->out->video->interlaced = 0;
     }
@@ -269,8 +269,8 @@ static void start_frame(AVFilterLink *link, AVFilterBufferRef *picref)
     if (!yadif->prev)
         yadif->prev = avfilter_ref_buffer(yadif->cur, AV_PERM_READ);
 
-    yadif->out = avfilter_get_video_buffer(ctx->outputs[0], AV_PERM_WRITE | AV_PERM_PRESERVE |
-                                       AV_PERM_REUSE, link->w, link->h);
+    yadif->out = ff_get_video_buffer(ctx->outputs[0], AV_PERM_WRITE | AV_PERM_PRESERVE |
+                                     AV_PERM_REUSE, link->w, link->h);
 
     avfilter_copy_buffer_ref_props(yadif->out, yadif->cur);
     yadif->out->video->interlaced = 0;
diff --git a/libavfilter/video.c b/libavfilter/video.c
index da1ae54b47..dfcfbb7387 100644
--- a/libavfilter/video.c
+++ b/libavfilter/video.c
@@ -28,7 +28,7 @@
 
 AVFilterBufferRef *ff_null_get_video_buffer(AVFilterLink *link, int perms, int w, int h)
 {
-    return avfilter_get_video_buffer(link->dst->outputs[0], perms, w, h);
+    return ff_get_video_buffer(link->dst->outputs[0], perms, w, h);
 }
 
 AVFilterBufferRef *ff_default_get_video_buffer(AVFilterLink *link, int perms, int w, int h)
@@ -127,7 +127,7 @@ fail:
     return NULL;
 }
 
-AVFilterBufferRef *avfilter_get_video_buffer(AVFilterLink *link, int perms, int w, int h)
+AVFilterBufferRef *ff_get_video_buffer(AVFilterLink *link, int perms, int w, int h)
 {
     AVFilterBufferRef *ret = NULL;
 
@@ -158,11 +158,11 @@ static void default_start_frame(AVFilterLink *inlink, AVFilterBufferRef *picref)
 {
     AVFilterLink *outlink = NULL;
 
-    if (inlink->dst->output_count)
+    if (inlink->dst->nb_outputs)
         outlink = inlink->dst->outputs[0];
 
     if (outlink) {
-        outlink->out_buf = avfilter_get_video_buffer(outlink, AV_PERM_WRITE, outlink->w, outlink->h);
+        outlink->out_buf = ff_get_video_buffer(outlink, AV_PERM_WRITE, outlink->w, outlink->h);
         avfilter_copy_buffer_ref_props(outlink->out_buf, picref);
         ff_start_frame(outlink, avfilter_ref_buffer(outlink->out_buf, ~0));
     }
@@ -191,7 +191,7 @@ void ff_start_frame(AVFilterLink *link, AVFilterBufferRef *picref)
                 picref->perms,
                 link->dstpad->min_perms, link->dstpad->rej_perms);
 
-        link->cur_buf = avfilter_get_video_buffer(link, dst->min_perms, link->w, link->h);
+        link->cur_buf = ff_get_video_buffer(link, dst->min_perms, link->w, link->h);
         link->src_buf = picref;
         avfilter_copy_buffer_ref_props(link->cur_buf, link->src_buf);
 
@@ -230,7 +230,7 @@ static void default_end_frame(AVFilterLink *inlink)
 {
     AVFilterLink *outlink = NULL;
 
-    if (inlink->dst->output_count)
+    if (inlink->dst->nb_outputs)
         outlink = inlink->dst->outputs[0];
 
     avfilter_unref_buffer(inlink->cur_buf);
@@ -271,7 +271,7 @@ static void default_draw_slice(AVFilterLink *inlink, int y, int h, int slice_dir
 {
     AVFilterLink *outlink = NULL;
 
-    if (inlink->dst->output_count)
+    if (inlink->dst->nb_outputs)
         outlink = inlink->dst->outputs[0];
 
     if (outlink)
@@ -364,4 +364,8 @@ void avfilter_draw_slice(AVFilterLink *link, int y, int h, int slice_dir)
 {
     ff_draw_slice(link, y, h, slice_dir);
 }
+AVFilterBufferRef *avfilter_get_video_buffer(AVFilterLink *link, int perms, int w, int h)
+{
+    return ff_get_video_buffer(link, perms, w, h);
+}
 #endif
diff --git a/libavfilter/video.h b/libavfilter/video.h
index b6886a6e8d..28835b9bf9 100644
--- a/libavfilter/video.h
+++ b/libavfilter/video.h
@@ -28,6 +28,19 @@ AVFilterBufferRef *ff_default_get_video_buffer(AVFilterLink *link,
                                                int perms, int w, int h);
 AVFilterBufferRef *ff_null_get_video_buffer(AVFilterLink *link, int perms, int w, int h);
 
+/**
+ * Request a picture buffer with a specific set of permissions.
+ *
+ * @param link  the output link to the filter from which the buffer will
+ *              be requested
+ * @param perms the required access permissions
+ * @param w     the minimum width of the buffer to allocate
+ * @param h     the minimum height of the buffer to allocate
+ * @return      A reference to the buffer. This must be unreferenced with
+ *              avfilter_unref_buffer when you are finished with it.
+ */
+AVFilterBufferRef *ff_get_video_buffer(AVFilterLink *link, int perms,
+                                       int w, int h);
 
 void ff_null_start_frame(AVFilterLink *link, AVFilterBufferRef *picref);
 void ff_null_draw_slice(AVFilterLink *link, int y, int h, int slice_dir);
diff --git a/libavfilter/vsink_nullsink.c b/libavfilter/vsink_nullsink.c
index 50fd728bfc..82d2d32b1e 100644
--- a/libavfilter/vsink_nullsink.c
+++ b/libavfilter/vsink_nullsink.c
@@ -17,6 +17,7 @@
  */
 
 #include "avfilter.h"
+#include "internal.h"
 
 static void start_frame(AVFilterLink *link, AVFilterBufferRef *picref)
 {
diff --git a/libavfilter/vsrc_color.c b/libavfilter/vsrc_color.c
index cde971450c..112c27c4eb 100644
--- a/libavfilter/vsrc_color.c
+++ b/libavfilter/vsrc_color.c
@@ -25,6 +25,7 @@
 
 #include "avfilter.h"
 #include "formats.h"
+#include "internal.h"
 #include "video.h"
 #include "libavutil/pixdesc.h"
 #include "libavutil/colorspace.h"
@@ -105,7 +106,7 @@ static int color_config_props(AVFilterLink *inlink)
 static int color_request_frame(AVFilterLink *link)
 {
     ColorContext *color = link->src->priv;
-    AVFilterBufferRef *picref = avfilter_get_video_buffer(link, AV_PERM_WRITE, color->w, color->h);
+    AVFilterBufferRef *picref = ff_get_video_buffer(link, AV_PERM_WRITE, color->w, color->h);
     picref->video->sample_aspect_ratio = (AVRational) {1, 1};
     picref->pts = color->pts++;
     picref->pos = -1;
diff --git a/libavfilter/vsrc_testsrc.c b/libavfilter/vsrc_testsrc.c
index 5de7abf51f..8334f3dcd9 100644
--- a/libavfilter/vsrc_testsrc.c
+++ b/libavfilter/vsrc_testsrc.c
@@ -37,6 +37,7 @@
 #include "libavutil/parseutils.h"
 #include "avfilter.h"
 #include "formats.h"
+#include "internal.h"
 #include "video.h"
 
 typedef struct {
@@ -137,8 +138,7 @@ static int request_frame(AVFilterLink *outlink)
 
     if (test->max_pts >= 0 && test->pts >= test->max_pts)
         return AVERROR_EOF;
-    picref = avfilter_get_video_buffer(outlink, AV_PERM_WRITE,
-                                       test->w, test->h);
+    picref = ff_get_video_buffer(outlink, AV_PERM_WRITE, test->w, test->h);
     picref->pts = test->pts++;
     picref->pos = -1;
     picref->video->key_frame = 1;