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>
47 namespace caspar { namespace ffmpeg {
49 struct audio_input_pad
51 boost::rational<int> time_base;
53 AVSampleFormat sample_fmt;
54 std::uint64_t audio_channel_layout;
57 boost::rational<int> time_base,
59 AVSampleFormat sample_fmt,
60 std::uint64_t audio_channel_layout)
61 : time_base(std::move(time_base))
62 , sample_rate(sample_rate)
63 , sample_fmt(sample_fmt)
64 , audio_channel_layout(audio_channel_layout)
69 struct audio_output_pad
71 std::vector<int> sample_rates;
72 std::vector<AVSampleFormat> sample_fmts;
73 std::vector<std::uint64_t> audio_channel_layouts;
76 std::vector<int> sample_rates,
77 std::vector<AVSampleFormat> sample_fmts,
78 std::vector<std::uint64_t> audio_channel_layouts)
79 : sample_rates(std::move(sample_rates))
80 , sample_fmts(std::move(sample_fmts))
81 , audio_channel_layouts(std::move(audio_channel_layouts))
86 class audio_filter : boost::noncopyable
90 std::vector<audio_input_pad> input_pads,
91 std::vector<audio_output_pad> output_pads,
92 const std::string& filtergraph);
93 audio_filter(audio_filter&& other);
94 audio_filter& operator=(audio_filter&& other);
96 void push(int input_pad_id, const std::shared_ptr<AVFrame>& frame);
97 void push(int input_pad_id, const boost::iterator_range<const int32_t*>& frame_samples);
98 std::shared_ptr<AVFrame> poll(int output_pad_id);
99 std::vector<spl::shared_ptr<AVFrame>> poll_all(int output_pad_id);
101 std::wstring filter_str() const;
103 struct implementation;
104 spl::shared_ptr<implementation> impl_;