]> git.sesse.net Git - casparcg/blob - modules/ffmpeg/producer/filter/audio_filter.h
[streaming_consumer] Implemented support for separating audio channels into separate...
[casparcg] / modules / ffmpeg / producer / filter / audio_filter.h
1 /*
2 * Copyright 2013 Sveriges Television AB http://casparcg.com/
3 *
4 * This file is part of CasparCG (www.casparcg.com).
5 *
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.
10 *
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.
15 *
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/>.
18 *
19 * Author: Robert Nagy, ronag89@gmail.com
20 */
21
22 #pragma once
23
24 #include <common/memory.h>
25
26 #include <boost/rational.hpp>
27 #include <boost/noncopyable.hpp>
28 #include <boost/range/iterator_range.hpp>
29
30 #include <string>
31 #include <vector>
32
33 #if defined(_MSC_VER)
34 #pragma warning (push)
35 #pragma warning (disable : 4244)
36 #endif
37 extern "C"
38 {
39 #include <libavutil/samplefmt.h>
40 }
41 #if defined(_MSC_VER)
42 #pragma warning (pop)
43 #endif
44
45 struct AVFrame;
46 struct AVFilterLink;
47
48 namespace caspar { namespace ffmpeg {
49
50 struct audio_input_pad
51 {
52         boost::rational<int>    time_base;
53         int                                             sample_rate;
54         AVSampleFormat                  sample_fmt;
55         std::uint64_t                   audio_channel_layout;
56
57         audio_input_pad(
58                         boost::rational<int> time_base,
59                         int sample_rate,
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)
66         {
67         }
68 };
69
70 struct audio_output_pad
71 {
72         std::vector<int>                        sample_rates;
73         std::vector<AVSampleFormat>     sample_fmts;
74         std::vector<std::uint64_t>      audio_channel_layouts;
75
76         audio_output_pad(
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))
83         {
84         }
85 };
86
87 class audio_filter : boost::noncopyable
88 {
89 public:
90         audio_filter(
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);
96
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);
102
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;
106 private:
107         struct implementation;
108         spl::shared_ptr<implementation> impl_;
109 };
110
111 }}