2 * Copyright 2013 Sveriges Television AB http://casparcg.com/
4 * This file is part of CasparCG (www.casparcg.com).
6 * CasparCG is free software: you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation, either version 3 of the License, or
9 * (at your option) any later version.
11 * CasparCG is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
16 * You should have received a copy of the GNU General Public License
17 * along with CasparCG. If not, see <http://www.gnu.org/licenses/>.
19 * Author: Robert Nagy, ronag89@gmail.com
24 #include <common/memory.h>
26 #include <boost/rational.hpp>
27 #include <boost/noncopyable.hpp>
28 #include <boost/range/iterator_range.hpp>
34 #pragma warning (push)
35 #pragma warning (disable : 4244)
39 #include <libavutil/samplefmt.h>
48 namespace caspar { namespace ffmpeg {
50 struct audio_input_pad
52 boost::rational<int> time_base;
54 AVSampleFormat sample_fmt;
55 std::uint64_t audio_channel_layout;
58 boost::rational<int> time_base,
60 AVSampleFormat sample_fmt,
61 std::uint64_t audio_channel_layout)
62 : time_base(std::move(time_base))
63 , sample_rate(sample_rate)
64 , sample_fmt(sample_fmt)
65 , audio_channel_layout(audio_channel_layout)
70 struct audio_output_pad
72 std::vector<int> sample_rates;
73 std::vector<AVSampleFormat> sample_fmts;
74 std::vector<std::uint64_t> audio_channel_layouts;
77 std::vector<int> sample_rates,
78 std::vector<AVSampleFormat> sample_fmts,
79 std::vector<std::uint64_t> audio_channel_layouts)
80 : sample_rates(std::move(sample_rates))
81 , sample_fmts(std::move(sample_fmts))
82 , audio_channel_layouts(std::move(audio_channel_layouts))
87 class audio_filter : boost::noncopyable
91 std::vector<audio_input_pad> input_pads,
92 std::vector<audio_output_pad> output_pads,
93 const std::string& filtergraph);
94 audio_filter(audio_filter&& other);
95 audio_filter& operator=(audio_filter&& other);
97 void set_guaranteed_output_num_samples_per_frame(int output_pad_id, int num_samples);
98 void push(int input_pad_id, const std::shared_ptr<AVFrame>& frame);
99 void push(int input_pad_id, const boost::iterator_range<const int32_t*>& frame_samples);
100 std::shared_ptr<AVFrame> poll(int output_pad_id);
101 std::vector<spl::shared_ptr<AVFrame>> poll_all(int output_pad_id);
103 std::wstring filter_str() const;
104 int get_num_output_pads() const;
105 const AVFilterLink& get_output_pad_info(int output_pad_id) const;
107 struct implementation;
108 spl::shared_ptr<implementation> impl_;