| /* |
| * Copyright (C) 2020 Apple Inc. All rights reserved. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions |
| * are met: |
| * 1. Redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer. |
| * 2. Redistributions in binary form must reproduce the above copyright |
| * notice, this list of conditions and the following disclaimer in the |
| * documentation and/or other materials provided with the distribution. |
| * |
| * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS'' AND ANY |
| * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED |
| * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE |
| * DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS BE LIABLE FOR ANY |
| * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES |
| * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; |
| * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON |
| * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS |
| * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| */ |
| |
| |
| #include "config.h" |
| #include "MediaRecorderPrivate.h" |
| |
| #if ENABLE(MEDIA_RECORDER) |
| |
| #include "MediaStreamPrivate.h" |
| |
| namespace WebCore { |
| |
| constexpr unsigned SmallAudioBitRate = 8000; |
| constexpr unsigned SmallVideoBitRate = 80000; |
| constexpr unsigned LargeAudioBitRate = 192000; |
| constexpr unsigned LargeVideoBitRate = 10000000; |
| |
| MediaRecorderPrivate::AudioVideoSelectedTracks MediaRecorderPrivate::selectTracks(MediaStreamPrivate& stream) |
| { |
| AudioVideoSelectedTracks selectedTracks; |
| stream.forEachTrack([&](auto& track) { |
| if (track.ended()) |
| return; |
| switch (track.type()) { |
| case RealtimeMediaSource::Type::Video: { |
| auto& settings = track.settings(); |
| if (!selectedTracks.videoTrack && settings.supportsWidth() && settings.supportsHeight()) |
| selectedTracks.videoTrack = &track; |
| break; |
| } |
| case RealtimeMediaSource::Type::Audio: |
| if (!selectedTracks.audioTrack) |
| selectedTracks.audioTrack = &track; |
| break; |
| } |
| }); |
| return selectedTracks; |
| } |
| |
| void MediaRecorderPrivate::checkTrackState(const MediaStreamTrackPrivate& track) |
| { |
| if (&track.source() == m_audioSource.get()) { |
| m_shouldMuteAudio = track.muted() || !track.enabled(); |
| return; |
| } |
| if (&track.source() == m_videoSource.get()) |
| m_shouldMuteVideo = track.muted() || !track.enabled(); |
| } |
| |
| void MediaRecorderPrivate::stop(CompletionHandler<void()>&& completionHandler) |
| { |
| setAudioSource(nullptr); |
| setVideoSource(nullptr); |
| stopRecording(WTFMove(completionHandler)); |
| } |
| |
| void MediaRecorderPrivate::pause(CompletionHandler<void()>&& completionHandler) |
| { |
| ASSERT(!m_pausedAudioSource); |
| ASSERT(!m_pausedVideoSource); |
| |
| m_pausedAudioSource = m_audioSource; |
| m_pausedVideoSource = m_videoSource; |
| |
| setAudioSource(nullptr); |
| setVideoSource(nullptr); |
| |
| pauseRecording(WTFMove(completionHandler)); |
| } |
| |
| void MediaRecorderPrivate::resume(CompletionHandler<void()>&& completionHandler) |
| { |
| ASSERT(m_pausedAudioSource || m_pausedVideoSource); |
| |
| setAudioSource(WTFMove(m_pausedAudioSource)); |
| setVideoSource(WTFMove(m_pausedVideoSource)); |
| |
| resumeRecording(WTFMove(completionHandler)); |
| } |
| |
| MediaRecorderPrivate::BitRates MediaRecorderPrivate::computeBitRates(const MediaRecorderPrivateOptions& options, const MediaStreamPrivate* stream) |
| { |
| if (options.bitsPerSecond) { |
| bool hasAudio = stream ? stream->hasAudio() : true; |
| bool hasVideo = stream ? stream->hasVideo() : true; |
| auto totalBitsPerSecond = *options.bitsPerSecond; |
| |
| if (hasAudio && hasVideo) { |
| auto audioBitsPerSecond = std::min(LargeAudioBitRate, std::max(SmallAudioBitRate, totalBitsPerSecond / 10)); |
| auto remainingBitsPerSecond = totalBitsPerSecond > audioBitsPerSecond ? (totalBitsPerSecond - audioBitsPerSecond) : 0; |
| return { audioBitsPerSecond, std::max(remainingBitsPerSecond, SmallVideoBitRate) }; |
| } |
| |
| if (hasAudio) |
| return { std::max(SmallAudioBitRate, totalBitsPerSecond), 0 }; |
| |
| return { 0, std::max(SmallVideoBitRate, totalBitsPerSecond) }; |
| } |
| |
| return { options.audioBitsPerSecond.value_or(LargeAudioBitRate), options.videoBitsPerSecond.value_or(LargeVideoBitRate) }; |
| } |
| |
| } // namespace WebCore |
| |
| #endif // ENABLE(MEDIA_RECORDER) |