/*
- Copyright (C) 2012 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/>.
*/
+
/** @file src/lib/filter_graph.cc
* @brief A graph of FFmpeg filters.
*/
+
+#include "filter_graph.h"
+#include "filter.h"
+#include "exceptions.h"
+#include "image.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>
}
-#include "decoder.h"
-#include "filter_graph.h"
-#include "filter.h"
-#include "exceptions.h"
-#include "image.h"
-#include "ffmpeg_content.h"
-#include "safe_stringstream.h"
+#include <iostream>
#include "i18n.h"
+
using std::string;
using std::list;
using std::pair;
using std::make_pair;
using std::cout;
-using boost::shared_ptr;
-using boost::weak_ptr;
-using libdcp::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.
- */
-FilterGraph::FilterGraph (shared_ptr<const FFmpegContent> content, libdcp::Size s, AVPixelFormat p)
- : _buffer_src_context (0)
- , _buffer_sink_context (0)
- , _size (s)
- , _pixel_format (p)
+using std::vector;
+using std::shared_ptr;
+using std::weak_ptr;
+using dcp::Size;
+
+
+void
+FilterGraph::setup (vector<Filter const *> filters)
{
- _frame = av_frame_alloc ();
-
- string filters = Filter::ffmpeg_string (content->filters());
- if (filters.empty ()) {
- filters = "copy";
+ auto const filters_string = Filter::ffmpeg_string (filters);
+ if (filters.empty()) {
+ _copy = true;
+ return;
}
- AVFilterGraph* graph = avfilter_graph_alloc();
- if (graph == 0) {
+ _frame = av_frame_alloc ();
+
+ _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) {
+ auto 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) {
+ auto const buffer_sink = avfilter_get_by_name (sink_name().c_str());
+ if (!buffer_sink) {
throw DecodeError (N_("Could not create buffer sink filter"));
}
- SafeStringStream a;
- a << "video_size=" << _size.width << "x" << _size.height << ":"
- << "pix_fmt=" << _pixel_format << ":"
- << "time_base=1/1:"
- << "pixel_aspect=1/1";
-
- if (avfilter_graph_create_filter (&_buffer_src_context, buffer_src, "in", a.str().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 = av_buffersink_params_alloc ();
- PixelFormat* pixel_fmts = new PixelFormat[2];
- pixel_fmts[0] = _pixel_format;
- pixel_fmts[1] = PIX_FMT_NONE;
- sink_params->pixel_fmts = pixel_fmts;
-
- 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"), nullptr, nullptr, _graph) < 0) {
throw DecodeError (N_("could not create buffer sink."));
}
- av_free (sink_params);
+ set_parameters (_buffer_sink_context);
- AVFilterInOut* outputs = avfilter_inout_alloc ();
+ auto outputs = avfilter_inout_alloc ();
outputs->name = av_strdup(N_("in"));
outputs->filter_ctx = _buffer_src_context;
outputs->pad_idx = 0;
outputs->next = 0;
- AVFilterInOut* inputs = avfilter_inout_alloc ();
+ auto inputs = avfilter_inout_alloc ();
inputs->name = av_strdup(N_("out"));
inputs->filter_ctx = _buffer_sink_context;
inputs->pad_idx = 0;
inputs->next = 0;
- if (avfilter_graph_parse (graph, filters.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."));
- }
- /* XXX: leaking `inputs' / `outputs' ? */
+ int e = avfilter_graph_config (_graph, 0);
+ if (e < 0) {
+ throw DecodeError (String::compose(N_("could not configure filter graph (%1)"), e));
+ }
}
-FilterGraph::~FilterGraph ()
-{
- av_frame_free (&_frame);
-}
-/** 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> >
-FilterGraph::process (AVFrame* frame)
+FilterGraph::~FilterGraph ()
{
- list<pair<shared_ptr<Image>, int64_t> > images;
-
- if (av_buffersrc_write_frame (_buffer_src_context, frame) < 0) {
- throw DecodeError (N_("could not push buffer into filter chain."));
+ if (_frame) {
+ av_frame_free (&_frame);
}
- while (true) {
- if (av_buffersink_get_frame (_buffer_sink_context, _frame) < 0) {
- break;
- }
-
- images.push_back (make_pair (shared_ptr<Image> (new Image (_frame)), av_frame_get_best_effort_timestamp (_frame)));
- av_frame_unref (_frame);
+ if (_graph) {
+ avfilter_graph_free (&_graph);
}
-
- return images;
}
-/** @param s Image size.
- * @param p Pixel format.
- * @return true if this chain can process images with `s' and `p', otherwise false.
- */
-bool
-FilterGraph::can_process (libdcp::Size s, AVPixelFormat p) const
+
+AVFilterContext *
+FilterGraph::get (string name)
{
- return (_size == s && _pixel_format == p);
+ return avfilter_graph_get_filter (_graph, name.c_str());
}
projects / dcpomatic.git / blobdiff