qpipewire_support.cpp

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// Copyright (C) 2025 The Qt Company Ltd.
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR LGPL-3.0-only OR GPL-2.0-only OR GPL-3.0-only
 
#include "qpipewire_support_p.h"
 
#include <QtMultimedia/private/qmultimedia_enum_to_string_converter_p.h>
#include <QtCore/qspan.h>
 
#include <pipewire/version.h>
#include <spa/debug/pod.h>
 
#include <cstdarg>
 
QT_BEGIN_NAMESPACE
 
namespace QtPipeWire {
 
PWThreadedEventLoop::PWThreadedEventLoop(const char *name)
    : m_loop{
          pw_thread_loop_new(name, /*props=*/nullptr),
      }
{
}
 
PWThreadedEventLoop::~PWThreadedEventLoop() = default;
 
PWThreadedEventLoop::operator bool() const
{
    return bool(m_loop);
}
 
int PWThreadedEventLoop::start()
{
    return pw_thread_loop_start(m_loop.get());
}
 
void PWThreadedEventLoop::stop()
{
    pw_thread_loop_stop(m_loop.get());
}
 
pw_thread_loop *PWThreadedEventLoop::get() const
{
    return m_loop.get();
}
 
pw_loop *PWThreadedEventLoop::loop() const
{
    return pw_thread_loop_get_loop(m_loop.get());
}
 
bool PWThreadedEventLoop::isInThread() const
{
    return pw_thread_loop_in_thread(m_loop.get());
}
 
void PWThreadedEventLoop::lock()
{
    pw_thread_loop_lock(m_loop.get());
}
 
void PWThreadedEventLoop::unlock()
{
    pw_thread_loop_unlock(m_loop.get());
}
 
int PWThreadedEventLoop::wait_for(std::chrono::seconds waitMax)
{
    return pw_thread_loop_timed_wait(m_loop.get(), int(waitMax.count()));
}
 
void PWThreadedEventLoop::signal(bool waitForAccept)
{
    pw_thread_loop_signal(m_loop.get(), waitForAccept);
}
 
} // namespace QtPipeWire
 
// debug support
QDebug operator<<(QDebug dbg, const spa_dict &dict)
{
    QSpan<const spa_dict_item> items{ dict.items, qsizetype(dict.n_items) };
 
    QDebugStateSaver saver(dbg);
    dbg.nospace();
 
    for (const spa_dict_item &item : items)
        dbg << item.key << "=" << item.value << ", ";
    return dbg;
}
 
#if PW_CHECK_VERSION(0, 3, 65)
 
namespace {
 
struct QtSpaDebugContext : ::spa_debug_context
{
    explicit QtSpaDebugContext(QDebug dbg)
        : ::spa_debug_context{},
          dbg{
              std::move(dbg),
          }
    {
        ::spa_debug_context::log = &doLog;
    }
 
    static void doLog(::spa_debug_context *ctx, const char *fmt, ...)
    {
        std::va_list args;
        va_start(args, fmt);
        QString logString = QString::vasprintf(fmt, args);
        va_end(args);
 
        auto *self = static_cast<QtSpaDebugContext *>(ctx);
        self->dbg << logString;
    }
 
    QDebug dbg;
};
 
} // namespace
 
QDebug operator<<(QDebug dbg, const spa_pod &pod)
{
    QtSpaDebugContext context{ std::move(dbg) };
 
    spa_debugc_pod(&context, 0, nullptr, &pod);
    return std::move(context.dbg);
}
 
#else
 
QDebug operator<<(QDebug dbg, const spa_pod &)
{
    dbg << "QDebug operator<<(QDebug, const spa_pod &) not implemented: minimum requirement: "
           "pipewire-0.3.65";
    return dbg;
}
 
#endif
 
// clang-format off
QT_MM_MAKE_STRING_RESOLVER( pw_stream_state, QtMultimediaPrivate::EnumName,
                           (PW_STREAM_STATE_ERROR, "error")
                           (PW_STREAM_STATE_UNCONNECTED, "unconnected")
                           (PW_STREAM_STATE_CONNECTING, "connecting")
                           (PW_STREAM_STATE_PAUSED, "paused")
                           (PW_STREAM_STATE_STREAMING, "streaming")
                          );
// clang-format on
 
QT_MM_DEFINE_QDEBUG_ENUM(pw_stream_state);
 
QDebug operator<<(QDebug dbg, const pw_time &state)
{
    // pw_time may have more members, but those are only required to exist in 0.3.55 and later
    dbg << QStringLiteral(u"pw_time{now: %1ns, rate: %2/%3, ticks: %4, delay: %5, queued: %6}")
                    .arg(state.now)
                    .arg(state.rate.num)
                    .arg(state.rate.denom)
                    .arg(state.ticks)
                    .arg(state.delay)
                    .arg(state.queued);
    return dbg;
}
 
QDebug operator<<(QDebug dbg, spa_data_type type)
{
#if !PW_CHECK_VERSION(1, 2, 0)
    constexpr auto SPA_DATA_SyncObj = spa_data_type(5);
#endif
 
    switch (type) {
    case SPA_DATA_Invalid:
        return dbg << "SPA_DATA_Invalid";
    case SPA_DATA_MemPtr:
        return dbg << "SPA_DATA_MemPtr";
    case SPA_DATA_MemFd:
        return dbg << "SPA_DATA_MemFd";
    case SPA_DATA_DmaBuf:
        return dbg << "SPA_DATA_DmaBuf";
    case SPA_DATA_MemId:
        return dbg << "SPA_DATA_MemId";
    case SPA_DATA_SyncObj:
        return dbg << "SPA_DATA_SyncObj";
    default:
        return dbg << "spa_data_type(" << int(type) << ")";
    }
}
 
QT_END_NAMESPACE