1 files changed, 55 insertions, 0 deletions
diff --git a/src/plugins/multimedia/ffmpeg/qffmpegioutils.cpp b/src/plugins/multimedia/ffmpeg/qffmpegioutils.cpp
new file mode 100644
index 000000000..cbef88f2b
--- /dev/null
+++ b/src/plugins/multimedia/ffmpeg/qffmpegioutils.cpp
@@ -0,0 +1,55 @@
+// Copyright (C) 2024 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 "qffmpegioutils_p.h"
+#include "qiodevice.h"
+#include "qffmpegdefs_p.h"
+
+QT_BEGIN_NAMESPACE
+
+namespace QFFmpeg {
+
+int readQIODevice(void *opaque, uint8_t *buf, int buf_size)
+{
+    auto *dev = static_cast<QIODevice *>(opaque);
+    Q_ASSERT(dev);
+
+    if (dev->atEnd())
+        return AVERROR_EOF;
+    return dev->read(reinterpret_cast<char *>(buf), buf_size);
+}
+
+int writeQIODevice(void *opaque, AvioWriteBufferType buf, int buf_size)
+{
+    auto dev = static_cast<QIODevice *>(opaque);
+    Q_ASSERT(dev);
+
+    return dev->write(reinterpret_cast<const char *>(buf), buf_size);
+}
+
+int64_t seekQIODevice(void *opaque, int64_t offset, int whence)
+{
+    QIODevice *dev = static_cast<QIODevice *>(opaque);
+    Q_ASSERT(dev);
+
+    if (dev->isSequential())
+        return AVERROR(EINVAL);
+
+    if (whence & AVSEEK_SIZE)
+        return dev->size();
+
+    whence &= ~AVSEEK_FORCE;
+
+    if (whence == SEEK_CUR)
+        offset += dev->pos();
+    else if (whence == SEEK_END)
+        offset += dev->size();
+
+    if (!dev->seek(offset))
+        return AVERROR(EINVAL);
+    return offset;
+}
+
+} // namespace QFFmpeg
+
+QT_END_NAMESPACE