Port filter graphs to new FFmpeg API.

[dcpomatic.git] / src / lib / video_filter_graph.cc

diff --git a/src/lib/video_filter_graph.cc b/src/lib/video_filter_graph.cc
index 306a17a5d84a33d891c3c8be465edf828521d921..a61da6773bbb8517330895aa2a8b01eae3e39c76 100644 (file)
--- a/src/lib/video_filter_graph.cc
+++ b/src/lib/video_filter_graph.cc
@@ -1,60 +1,69 @@
 /*
-    Copyright (C) 2012-2015 Carl Hetherington <cth@carlh.net>
+    Copyright (C) 2012-2021 Carl Hetherington <cth@carlh.net>
 
-    This program is free software; you can redistribute it and/or modify
+    This file is part of DCP-o-matic.
+
+    DCP-o-matic is free software; you can redistribute it and/or modify
     it under the terms of the GNU General Public License as published by
     the Free Software Foundation; either version 2 of the License, or
     (at your option) any later version.
 
-    This program is distributed in the hope that it will be useful,
+    DCP-o-matic 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 General Public License for more details.
 
     You should have received a copy of the GNU General Public License
-    along with this program; if not, write to the Free Software
-    Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+    along with DCP-o-matic.  If not, see <http://www.gnu.org/licenses/>.
 
 */
 
-#include "video_filter_graph.h"
-#include "image.h"
+
 #include "compose.hpp"
+#include "image.h"
+#include "video_filter_graph.h"
+#include "warnings.h"
 extern "C" {
 #include <libavfilter/buffersrc.h>
 #include <libavfilter/buffersink.h>
+#include <libavutil/opt.h>
 }
 
 #include "i18n.h"
 
+
 using std::list;
+using std::make_pair;
+using std::make_shared;
 using std::pair;
-using std::vector;
+using std::shared_ptr;
 using std::string;
-using std::make_pair;
-using boost::shared_ptr;
+using std::vector;
+
 
-VideoFilterGraph::VideoFilterGraph (dcp::Size s, AVPixelFormat p)
+VideoFilterGraph::VideoFilterGraph (dcp::Size s, AVPixelFormat p, dcp::Fraction r)
        : _size (s)
        , _pixel_format (p)
+       , _frame_rate (r)
 {
 
 }
 
+
 /** Take an AVFrame and process it using our configured filters, returning a
  *  set of Images.  Caller handles memory management of the input frame.
  */
-list<pair<shared_ptr<Image>, int64_t> >
+list<pair<shared_ptr<Image>, int64_t>>
 VideoFilterGraph::process (AVFrame* frame)
 {
-       list<pair<shared_ptr<Image>, int64_t> > images;
+       list<pair<shared_ptr<Image>, int64_t>> images;
 
        if (_copy) {
-               images.push_back (make_pair (shared_ptr<Image> (new Image (frame)), av_frame_get_best_effort_timestamp (frame)));
+               images.push_back (make_pair(make_shared<Image>(frame), frame->best_effort_timestamp));
        } else {
                int r = av_buffersrc_write_frame (_buffer_src_context, frame);
                if (r < 0) {
-                       throw DecodeError (String::compose (N_("could not push buffer into filter chain (%1)."), r));
+                       throw DecodeError (String::compose(N_("could not push buffer into filter chain (%1)."), r));
                }
 
                while (true) {
@@ -62,7 +71,7 @@ VideoFilterGraph::process (AVFrame* frame)
                                break;
                        }
 
-                       images.push_back (make_pair (shared_ptr<Image> (new Image (_frame)), av_frame_get_best_effort_timestamp (_frame)));
+                       images.push_back (make_pair(make_shared<Image>(_frame), frame->best_effort_timestamp));
                        av_frame_unref (_frame);
                }
        }
@@ -70,6 +79,7 @@ VideoFilterGraph::process (AVFrame* frame)
        return images;
 }
 
+
 /** @param s Image size.
  *  @param p Pixel format.
  *  @return true if this chain can process images with `s' and `p', otherwise false.
@@ -80,26 +90,40 @@ VideoFilterGraph::can_process (dcp::Size s, AVPixelFormat p) const
        return (_size == s && _pixel_format == p);
 }
 
+
 string
 VideoFilterGraph::src_parameters () const
 {
-       SafeStringStream a;
+       char buffer[256];
+       snprintf (
+               buffer, sizeof(buffer),
+               "video_size=%dx%d:pix_fmt=%d:frame_rate=%d/%d:time_base=1/1:pixel_aspect=1/1",
+               _size.width, _size.height,
+               _pixel_format,
+               _frame_rate.numerator, _frame_rate.denominator
+               );
+       return buffer;
+}
+
+
+void
+VideoFilterGraph::set_parameters (AVFilterContext* context) const
+{
+       AVPixelFormat pix_fmts[] = { _pixel_format, AV_PIX_FMT_NONE };
+       int r = av_opt_set_int_list (context, "pix_fmts", pix_fmts, AV_PIX_FMT_NONE, AV_OPT_SEARCH_CHILDREN);
+       DCPOMATIC_ASSERT (r >= 0);
+}
 
-       a << "video_size=" << _size.width << "x" << _size.height << ":"
-         << "pix_fmt=" << _pixel_format << ":"
-         << "time_base=1/1:"
-         << "pixel_aspect=1/1";
 
-       return a.str ();
+string
+VideoFilterGraph::src_name () const
+{
+       return "buffer";
 }
 
-AVBufferSinkParams *
-VideoFilterGraph::sink_parameters () const
+
+string
+VideoFilterGraph::sink_name () const
 {
-       AVBufferSinkParams* sink_params = av_buffersink_params_alloc ();
-       AVPixelFormat* pixel_fmts = new AVPixelFormat[2];
-       pixel_fmts[0] = _pixel_format;
-       pixel_fmts[1] = AV_PIX_FMT_NONE;
-       sink_params->pixel_fmts = pixel_fmts;
-       return sink_params;
+       return "buffersink";
 }