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| 1 | +/* |
| 2 | + * Copyright (C) 2020 Apple Inc. All rights reserved. |
| 3 | + * |
| 4 | + * Redistribution and use in source and binary forms, with or without |
| 5 | + * modification, are permitted provided that the following conditions |
| 6 | + * are met: |
| 7 | + * 1. Redistributions of source code must retain the above copyright |
| 8 | + * notice, this list of conditions and the following disclaimer. |
| 9 | + * 2. Redistributions in binary form must reproduce the above copyright |
| 10 | + * notice, this list of conditions and the following disclaimer in the |
| 11 | + * documentation and/or other materials provided with the distribution. |
| 12 | + * |
| 13 | + * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS'' |
| 14 | + * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, |
| 15 | + * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR |
| 16 | + * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS |
| 17 | + * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR |
| 18 | + * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF |
| 19 | + * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS |
| 20 | + * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN |
| 21 | + * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) |
| 22 | + * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF |
| 23 | + * THE POSSIBILITY OF SUCH DAMAGE. |
| 24 | + */ |
| 25 | + |
| 26 | +#include "config.h" |
| 27 | +#include "OutputContext.h" |
| 28 | + |
| 29 | +#if USE(AVFOUNDATION) |
| 30 | + |
| 31 | +#include "OutputDevice.h" |
| 32 | +#include <mutex> |
| 33 | +#include <pal/spi/cocoa/AVFoundationSPI.h> |
| 34 | +#include <wtf/NeverDestroyed.h> |
| 35 | +#include <wtf/text/StringBuilder.h> |
| 36 | + |
| 37 | +#include <pal/cocoa/AVFoundationSoftLink.h> |
| 38 | + |
| 39 | +namespace PAL { |
| 40 | + |
| 41 | +OutputContext::OutputContext(RetainPtr<AVOutputContext>&& context) |
| 42 | + : m_context(WTFMove(context)) |
| 43 | +{ |
| 44 | +} |
| 45 | + |
| 46 | +Optional<OutputContext>& OutputContext::sharedAudioPresentationOutputContext() |
| 47 | +{ |
| 48 | + static NeverDestroyed<Optional<OutputContext>> sharedAudioPresentationOutputContext = [] () -> Optional<OutputContext> { |
| 49 | + if (![PAL::getAVOutputContextClass() respondsToSelector:@selector(sharedAudioPresentationOutputContext)]) |
| 50 | + return WTF::nullopt; |
| 51 | + |
| 52 | + auto context = [getAVOutputContextClass() sharedAudioPresentationOutputContext]; |
| 53 | + if (!context) |
| 54 | + return WTF::nullopt; |
| 55 | + |
| 56 | + return OutputContext(retainPtr(context)); |
| 57 | + }(); |
| 58 | + return sharedAudioPresentationOutputContext; |
| 59 | +} |
| 60 | + |
| 61 | +bool OutputContext::supportsMultipleOutputDevices() |
| 62 | +{ |
| 63 | + return [m_context respondsToSelector:@selector(supportsMultipleOutputDevices)] |
| 64 | + && [m_context respondsToSelector:@selector(outputDevices)] |
| 65 | + && [m_context supportsMultipleOutputDevices]; |
| 66 | +} |
| 67 | + |
| 68 | +String OutputContext::deviceName() |
| 69 | +{ |
| 70 | + if (!supportsMultipleOutputDevices()) |
| 71 | + return [m_context deviceName]; |
| 72 | + |
| 73 | + StringBuilder builder; |
| 74 | + auto devices = outputDevices(); |
| 75 | + auto iterator = devices.begin(); |
| 76 | + |
| 77 | + while (iterator != devices.end()) { |
| 78 | + builder.append(iterator->name()); |
| 79 | + |
| 80 | + if (++iterator != devices.end()) |
| 81 | + builder.append(" + "); |
| 82 | + } |
| 83 | + |
| 84 | + return builder.toString(); |
| 85 | +} |
| 86 | + |
| 87 | +Vector<OutputDevice> OutputContext::outputDevices() const |
| 88 | +{ |
| 89 | + if (![m_context respondsToSelector:@selector(outputDevices)]) { |
| 90 | + if (auto *outputDevice = [m_context outputDevice]) |
| 91 | + return { retainPtr(outputDevice) }; |
| 92 | + return { }; |
| 93 | + } |
| 94 | + |
| 95 | + auto *avOutputDevices = [m_context outputDevices]; |
| 96 | + Vector<OutputDevice> outputDevices; |
| 97 | + outputDevices.reserveInitialCapacity(avOutputDevices.count); |
| 98 | + for (AVOutputDevice *device in avOutputDevices) |
| 99 | + outputDevices.uncheckedAppend({ retainPtr(device) }); |
| 100 | + return outputDevices; |
| 101 | +} |
| 102 | + |
| 103 | + |
| 104 | +} |
| 105 | + |
| 106 | +#endif |
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