84 lines
3.1 KiB
C++
84 lines
3.1 KiB
C++
// Copyright 2020 The Chromium Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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#ifndef CAST_STREAMING_CAPTURE_CONFIGS_H_
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#define CAST_STREAMING_CAPTURE_CONFIGS_H_
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#include <string>
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#include <vector>
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#include "cast/streaming/constants.h"
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#include "cast/streaming/resolution.h"
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#include "util/simple_fraction.h"
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namespace openscreen {
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namespace cast {
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// A configuration set that can be used by the sender to capture audio, and the
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// receiver to playback audio. Used by Cast Streaming to provide an offer to the
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// receiver.
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struct AudioCaptureConfig {
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// Audio codec represented by this configuration.
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AudioCodec codec = AudioCodec::kOpus;
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// Number of channels used by this configuration.
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int channels = kDefaultAudioChannels;
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// Average bit rate in bits per second used by this configuration. A value
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// of "zero" suggests that the bitrate should be automatically selected by
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// the sender.
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int bit_rate = 0;
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// Sample rate for audio RTP timebase.
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int sample_rate = kDefaultAudioSampleRate;
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// Target playout delay in milliseconds.
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std::chrono::milliseconds target_playout_delay = kDefaultTargetPlayoutDelay;
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// The codec parameter for this configuration. Honors the format laid out
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// in RFC 6381: https://datatracker.ietf.org/doc/html/rfc6381
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// NOTE: the "profiles" parameter is not supported in our implementation.
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std::string codec_parameter;
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};
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// A configuration set that can be used by the sender to capture video, as
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// well as the receiver to playback video. Used by Cast Streaming to provide an
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// offer to the receiver.
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struct VideoCaptureConfig {
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// Video codec represented by this configuration.
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VideoCodec codec = VideoCodec::kVp8;
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// Maximum frame rate in frames per second.
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// For simple cases, the frame rate may be provided by simply setting the
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// number to the desired value, e.g. 30 or 60FPS. Some common frame rates like
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// 23.98 FPS (for NTSC compatibility) are represented as fractions, in this
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// case 24000/1001.
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SimpleFraction max_frame_rate{kDefaultFrameRate, 1};
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// Number specifying the maximum bit rate for this stream. A value of
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// zero means that the maximum bit rate should be automatically selected by
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// the sender.
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int max_bit_rate = 0;
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// Resolutions to be offered to the receiver. At least one resolution
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// must be provided.
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std::vector<Resolution> resolutions;
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// Target playout delay in milliseconds.
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std::chrono::milliseconds target_playout_delay = kDefaultTargetPlayoutDelay;
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// The codec parameter for this configuration. Honors the format laid out
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// in RFC 6381: https://datatracker.ietf.org/doc/html/rfc6381.
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// VP8 and VP9 codec parameter versions are defined here:
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// https://developer.mozilla.org/en-US/docs/Web/Media/Formats/codecs_parameter#webm
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// https://www.webmproject.org/vp9/mp4/#codecs-parameter-string
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// NOTE: the "profiles" parameter is not supported in our implementation.
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std::string codec_parameter;
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};
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} // namespace cast
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} // namespace openscreen
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#endif // CAST_STREAMING_CAPTURE_CONFIGS_H_
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