Source/WebKit/GPUProcess/webrtc/RemoteMediaRecorder.cpp

/*
 * Copyright (C) 2020 Apple Inc. All rights reserved.
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 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
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 *    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
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#include "config.h"
#include "RemoteMediaRecorder.h"

#if PLATFORM(COCOA) && ENABLE(GPU_PROCESS) && ENABLE(MEDIA_STREAM)

#include "Connection.h"
#include "GPUConnectionToWebProcess.h"
#include "SharedRingBufferStorage.h"
#include <WebCore/CARingBuffer.h>
#include <WebCore/ImageTransferSessionVT.h>
#include <WebCore/RemoteVideoSample.h>
#include <WebCore/WebAudioBufferList.h>
#include <wtf/CompletionHandler.h>

#define MESSAGE_CHECK(assertion) MESSAGE_CHECK_BASE(assertion, (&m_gpuConnectionToWebProcess.connection()))

namespace WebKit {
using namespace WebCore;

std::unique_ptr<RemoteMediaRecorder> RemoteMediaRecorder::create(GPUConnectionToWebProcess& gpuConnectionToWebProcess, MediaRecorderIdentifier identifier, bool recordAudio, bool recordVideo, const MediaRecorderPrivateOptions& options)
{
    auto writer = MediaRecorderPrivateWriter::create(recordAudio, recordVideo, options);
    if (!writer)
        return nullptr;
    return std::unique_ptr<RemoteMediaRecorder>(new RemoteMediaRecorder { gpuConnectionToWebProcess, identifier, writer.releaseNonNull(), recordAudio });
}

RemoteMediaRecorder::RemoteMediaRecorder(GPUConnectionToWebProcess& gpuConnectionToWebProcess, MediaRecorderIdentifier identifier, Ref<MediaRecorderPrivateWriter>&& writer, bool recordAudio)
    : m_gpuConnectionToWebProcess(gpuConnectionToWebProcess)
    , m_identifier(identifier)
    , m_writer(WTFMove(writer))
{
    if (recordAudio)
        m_ringBuffer = makeUnique<CARingBuffer>();
}

RemoteMediaRecorder::~RemoteMediaRecorder()
{
}

void RemoteMediaRecorder::audioSamplesStorageChanged(const SharedMemory::IPCHandle& ipcHandle, const WebCore::CAAudioStreamDescription& description, uint64_t numberOfFrames)
{
    MESSAGE_CHECK(m_ringBuffer);

    m_description = description;

    m_ringBuffer = CARingBuffer::adoptStorage(makeUniqueRef<ReadOnlySharedRingBufferStorage>(ipcHandle.handle), description, numberOfFrames).moveToUniquePtr();
    m_audioBufferList = makeUnique<WebAudioBufferList>(m_description);
}

void RemoteMediaRecorder::audioSamplesAvailable(MediaTime time, uint64_t numberOfFrames)
{
    MESSAGE_CHECK(m_ringBuffer);
    MESSAGE_CHECK(m_audioBufferList);
    MESSAGE_CHECK(WebAudioBufferList::isSupportedDescription(m_description, numberOfFrames));

    m_audioBufferList->setSampleCount(numberOfFrames);
    m_ringBuffer->fetch(m_audioBufferList->list(), numberOfFrames, time.timeValue());

    m_writer->appendAudioSampleBuffer(*m_audioBufferList, m_description, time, numberOfFrames);
}

void RemoteMediaRecorder::videoSampleAvailable(WebCore::RemoteVideoSample&& remoteSample)
{
    if (!m_imageTransferSession || m_imageTransferSession->pixelFormat() != remoteSample.videoFormat())
        m_imageTransferSession = ImageTransferSessionVT::create(remoteSample.videoFormat());

    if (!m_imageTransferSession) {
        ASSERT_NOT_REACHED();
        return;
    }

    auto sampleBuffer = m_imageTransferSession->createMediaSample(remoteSample);
    if (!sampleBuffer) {
        ASSERT_NOT_REACHED();
        return;
    }

    m_writer->appendVideoSampleBuffer(*sampleBuffer);
}

void RemoteMediaRecorder::fetchData(CompletionHandler<void(IPC::DataReference&&, double)>&& completionHandler)
{
    m_writer->fetchData([completionHandler = WTFMove(completionHandler)](auto&& data, auto timeCode) mutable {
        auto* pointer = data ? data->data() : nullptr;
        completionHandler(IPC::DataReference { pointer, data ? data->size() : 0 }, timeCode);
    });
}

void RemoteMediaRecorder::stopRecording(CompletionHandler<void()>&& completionHandler)
{
    m_writer->stopRecording();
    completionHandler();
}

void RemoteMediaRecorder::pause(CompletionHandler<void()>&& completionHandler)
{
    m_writer->pause();
    completionHandler();
}

void RemoteMediaRecorder::resume(CompletionHandler<void()>&& completionHandler)
{
    m_writer->resume();
    completionHandler();
}

}

#undef MESSAGE_CHECK

#endif // PLATFORM(COCOA) && ENABLE(GPU_PROCESS) && ENABLE(MEDIA_STREAM)