2 Copyright (C) 2012 Carl Hetherington <cth@carlh.net>
4 This program is free software; you can redistribute it and/or modify
5 it under the terms of the GNU General Public License as published by
6 the Free Software Foundation; either version 2 of the License, or
7 (at your option) any later version.
9 This program is distributed in the hope that it will be useful,
10 but WITHOUT ANY WARRANTY; without even the implied warranty of
11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 GNU General Public License for more details.
14 You should have received a copy of the GNU General Public License
15 along with this program; if not, write to the Free Software
16 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
21 #include <libavfilter/avfiltergraph.h>
22 #include <libavfilter/buffersrc.h>
23 #if (LIBAVFILTER_VERSION_MAJOR == 2 && LIBAVFILTER_VERSION_MINOR >= 53 && LIBAVFILTER_VERSION_MINOR <= 77) || LIBAVFILTER_VERSION_MAJOR == 3
24 #include <libavfilter/avcodec.h>
25 #include <libavfilter/buffersink.h>
26 #elif LIBAVFILTER_VERSION_MAJOR == 2 && LIBAVFILTER_VERSION_MINOR == 15
27 #include <libavfilter/vsrc_buffer.h>
29 #include <libavformat/avio.h>
32 #include "filter_graph.h"
33 #include "ffmpeg_compatibility.h"
35 #include "exceptions.h"
38 #include "ffmpeg_decoder.h"
40 using std::stringstream;
43 using boost::shared_ptr;
45 FilterGraph::FilterGraph (shared_ptr<Film> film, FFmpegDecoder* decoder, bool crop, Size s, AVPixelFormat p)
46 : _buffer_src_context (0)
47 , _buffer_sink_context (0)
51 string filters = Filter::ffmpeg_strings (film->filters()).first;
52 if (!filters.empty ()) {
57 filters += crop_string (Position (film->crop().left, film->crop().top), film->cropped_size (decoder->native_size()));
59 filters += crop_string (Position (0, 0), decoder->native_size());
62 avfilter_register_all ();
64 AVFilterGraph* graph = avfilter_graph_alloc();
66 throw DecodeError ("Could not create filter graph.");
69 AVFilter* buffer_src = avfilter_get_by_name("buffer");
70 if (buffer_src == 0) {
71 throw DecodeError ("Could not find buffer src filter");
74 AVFilter* buffer_sink = get_sink ();
77 a << _size.width << ":"
78 << _size.height << ":"
79 << _pixel_format << ":"
80 << decoder->time_base_numerator() << ":"
81 << decoder->time_base_denominator() << ":"
82 << decoder->sample_aspect_ratio_numerator() << ":"
83 << decoder->sample_aspect_ratio_denominator();
87 if ((r = avfilter_graph_create_filter (&_buffer_src_context, buffer_src, "in", a.str().c_str(), 0, graph)) < 0) {
88 throw DecodeError ("could not create buffer source");
91 AVBufferSinkParams* sink_params = av_buffersink_params_alloc ();
92 PixelFormat* pixel_fmts = new PixelFormat[2];
93 pixel_fmts[0] = _pixel_format;
94 pixel_fmts[1] = PIX_FMT_NONE;
95 sink_params->pixel_fmts = pixel_fmts;
97 if (avfilter_graph_create_filter (&_buffer_sink_context, buffer_sink, "out", 0, sink_params, graph) < 0) {
98 throw DecodeError ("could not create buffer sink.");
101 AVFilterInOut* outputs = avfilter_inout_alloc ();
102 outputs->name = av_strdup("in");
103 outputs->filter_ctx = _buffer_src_context;
104 outputs->pad_idx = 0;
107 AVFilterInOut* inputs = avfilter_inout_alloc ();
108 inputs->name = av_strdup("out");
109 inputs->filter_ctx = _buffer_sink_context;
113 #if LIBAVFILTER_VERSION_MAJOR == 2 && LIBAVFILTER_VERSION_MINOR == 15
114 if (avfilter_graph_parse (graph, filters.c_str(), inputs, outputs, 0) < 0) {
115 throw DecodeError ("could not set up filter graph.");
118 if (avfilter_graph_parse (graph, filters.c_str(), &inputs, &outputs, 0) < 0) {
119 throw DecodeError ("could not set up filter graph.");
123 if (avfilter_graph_config (graph, 0) < 0) {
124 throw DecodeError ("could not configure filter graph.");
127 /* XXX: leaking `inputs' / `outputs' ? */
130 list<shared_ptr<Image> >
131 FilterGraph::process (AVFrame const * frame)
133 list<shared_ptr<Image> > images;
135 #if LIBAVFILTER_VERSION_MAJOR == 2 && LIBAVFILTER_VERSION_MINOR >= 53 && LIBAVFILTER_VERSION_MINOR <= 61
137 if (av_vsrc_buffer_add_frame (_buffer_src_context, frame, 0) < 0) {
138 throw DecodeError ("could not push buffer into filter chain.");
141 #elif LIBAVFILTER_VERSION_MAJOR == 2 && LIBAVFILTER_VERSION_MINOR == 15
144 par.num = sample_aspect_ratio_numerator ();
145 par.den = sample_aspect_ratio_denominator ();
147 if (av_vsrc_buffer_add_frame (_buffer_src_context, frame, 0, par) < 0) {
148 throw DecodeError ("could not push buffer into filter chain.");
153 if (av_buffersrc_write_frame (_buffer_src_context, frame) < 0) {
154 throw DecodeError ("could not push buffer into filter chain.");
159 #if LIBAVFILTER_VERSION_MAJOR == 2 && LIBAVFILTER_VERSION_MINOR >= 15 && LIBAVFILTER_VERSION_MINOR <= 61
160 while (avfilter_poll_frame (_buffer_sink_context->inputs[0])) {
162 while (av_buffersink_read (_buffer_sink_context, 0)) {
165 #if LIBAVFILTER_VERSION_MAJOR == 2 && LIBAVFILTER_VERSION_MINOR >= 15
167 int r = avfilter_request_frame (_buffer_sink_context->inputs[0]);
169 throw DecodeError ("could not request filtered frame");
172 AVFilterBufferRef* filter_buffer = _buffer_sink_context->inputs[0]->cur_buf;
176 AVFilterBufferRef* filter_buffer;
177 if (av_buffersink_get_buffer_ref (_buffer_sink_context, &filter_buffer, 0) < 0) {
184 /* This takes ownership of filter_buffer */
185 images.push_back (shared_ptr<Image> (new FilterBufferImage ((PixelFormat) frame->format, filter_buffer)));
193 FilterGraph::can_process (Size s, AVPixelFormat p) const
195 return (_size == s && _pixel_format == p);