X-Git-Url: https://main.carlh.net/gitweb/?a=blobdiff_plain;f=src%2Flib%2Ffilter_graph.cc;h=daceeaf2d96924b97fb5af633927e73e04fdd2f7;hb=895b386b6751afd3d068155f4ea71e762297672a;hp=3efb6970cbf75d893428cc5f76f963cfa2d186fe;hpb=b147c77c6d44399ad522298ac52a481fe5988287;p=dcpomatic.git

diff --git a/src/lib/filter_graph.cc b/src/lib/filter_graph.cc
index 3efb6970c..daceeaf2d 100644
--- a/src/lib/filter_graph.cc
+++ b/src/lib/filter_graph.cc
@@ -1,19 +1,20 @@
 /*
     Copyright (C) 2012 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/>.
 
 */
 
@@ -25,12 +26,9 @@
 #include "filter.h"
 #include "exceptions.h"
 #include "image.h"
-#include "safe_stringstream.h"
 #include "compose.hpp"
 extern "C" {
-#include <libavfilter/avfiltergraph.h>
 #include <libavfilter/buffersrc.h>
-#include <libavfilter/avcodec.h>
 #include <libavfilter/buffersink.h>
 #include <libavformat/avio.h>
 }
@@ -48,13 +46,10 @@ using boost::shared_ptr;
 using boost::weak_ptr;
 using dcp::Size;
 
-/** Construct a FilterGraph for the settings in a piece of content.
- *  @param content Content.
- *  @param s Size of the images to process.
- *  @param p Pixel format of the images to process.
- */
+/** Construct a FilterGraph for the settings in a piece of content */
 FilterGraph::FilterGraph ()
-	: _copy (false)
+	: _graph (0)
+	, _copy (false)
 	, _buffer_src_context (0)
 	, _buffer_sink_context (0)
 	, _frame (0)
@@ -73,28 +68,28 @@ FilterGraph::setup (vector<Filter const *> filters)
 
 	_frame = av_frame_alloc ();
 
-	AVFilterGraph* graph = avfilter_graph_alloc();
-	if (graph == 0) {
+	_graph = avfilter_graph_alloc();
+	if (!_graph) {
 		throw DecodeError (N_("could not create filter graph."));
 	}
 
-	AVFilter* buffer_src = avfilter_get_by_name(N_("buffer"));
-	if (buffer_src == 0) {
+	AVFilter const * buffer_src = avfilter_get_by_name (src_name().c_str());
+	if (!buffer_src) {
 		throw DecodeError (N_("could not find buffer src filter"));
 	}
 
-	AVFilter* buffer_sink = avfilter_get_by_name(N_("buffersink"));
-	if (buffer_sink == 0) {
+	AVFilter const * buffer_sink = avfilter_get_by_name (sink_name().c_str());
+	if (!buffer_sink) {
 		throw DecodeError (N_("Could not create buffer sink filter"));
 	}
 
-	if (avfilter_graph_create_filter (&_buffer_src_context, buffer_src, "in", src_parameters().c_str(), 0, graph) < 0) {
+	if (avfilter_graph_create_filter (&_buffer_src_context, buffer_src, N_("in"), src_parameters().c_str(), 0, _graph) < 0) {
 		throw DecodeError (N_("could not create buffer source"));
 	}
 
-	AVBufferSinkParams* sink_params = sink_parameters ();
+	void* sink_params = sink_parameters ();
 
-	if (avfilter_graph_create_filter (&_buffer_sink_context, buffer_sink, N_("out"), 0, sink_params, graph) < 0) {
+	if (avfilter_graph_create_filter (&_buffer_sink_context, buffer_sink, N_("out"), 0, sink_params, _graph) < 0) {
 		throw DecodeError (N_("could not create buffer sink."));
 	}
 
@@ -112,12 +107,13 @@ FilterGraph::setup (vector<Filter const *> filters)
 	inputs->pad_idx = 0;
 	inputs->next = 0;
 
-	if (avfilter_graph_parse (graph, filters_string.c_str(), inputs, outputs, 0) < 0) {
+	if (avfilter_graph_parse (_graph, filters_string.c_str(), inputs, outputs, 0) < 0) {
 		throw DecodeError (N_("could not set up filter graph."));
 	}
 
-	if (avfilter_graph_config (graph, 0) < 0) {
-		throw DecodeError (N_("could not configure filter graph."));
+	int e = avfilter_graph_config (_graph, 0);
+	if (e < 0) {
+		throw DecodeError (String::compose (N_("could not configure filter graph (%1)"), e));
 	}
 }
 
@@ -126,4 +122,14 @@ FilterGraph::~FilterGraph ()
 	if (_frame) {
 		av_frame_free (&_frame);
 	}
+
+	if (_graph) {
+		avfilter_graph_free (&_graph);
+	}
+}
+
+AVFilterContext *
+FilterGraph::get (string name)
+{
+	return avfilter_graph_get_filter (_graph, name.c_str ());
 }