1 files changed, 67 insertions, 0 deletions
diff --git a/src/plugins/multimedia/ffmpeg/qffmpeg.cpp b/src/plugins/multimedia/ffmpeg/qffmpeg.cpp
index 73c6c6788..f5b97566a 100644
--- a/src/plugins/multimedia/ffmpeg/qffmpeg.cpp
+++ b/src/plugins/multimedia/ffmpeg/qffmpeg.cpp
@@ -2,6 +2,8 @@
 // SPDX-License-Identifier: LicenseRef-Qt-Commercial OR LGPL-3.0-only OR GPL-2.0-only OR GPL-3.0-only
 
 #include "qffmpeg_p.h"
+#include "qaudioformat.h"
+#include "qffmpegmediaformatinfo_p.h"
 
 #include <qdebug.h>
 #include <qloggingcategory.h>
@@ -15,6 +17,7 @@
 extern "C" {
 #include <libavutil/pixdesc.h>
 #include <libavutil/samplefmt.h>
+#include <libavutil/opt.h>
 
 #ifdef Q_OS_DARWIN
 #include <libavutil/hwcontext_videotoolbox.h>
@@ -427,6 +430,70 @@ const AVPacketSideData *streamSideData(const AVStream *stream, AVPacketSideDataT
 #endif
 }
 
+ResampleAudioFormat::ResampleAudioFormat(const AVCodecParameters* codecPar)
+    : sampleFormat(AVSampleFormat(codecPar->format)), sampleRate(codecPar->sample_rate)
+{
+#if QT_FFMPEG_OLD_CHANNEL_LAYOUT
+    if (codecPar->channel_layout) {
+        channelLayoutMask = codecPar->channel_layout;
+    }
+    else {
+        const auto channelConfig =
+                QAudioFormat::defaultChannelConfigForChannelCount(codecPar->channels);
+        channelLayoutMask = QFFmpegMediaFormatInfo::avChannelLayout(channelConfig);
+    }
+#else
+    channelLayout = codecPar->ch_layout;
+#endif
+}
+
+ResampleAudioFormat::ResampleAudioFormat(const QAudioFormat& audioFormat)
+    : sampleFormat(QFFmpegMediaFormatInfo::avSampleFormat(audioFormat.sampleFormat()))
+    , sampleRate(audioFormat.sampleRate())
+{
+    const auto channelConfig = audioFormat.channelConfig() == QAudioFormat::ChannelConfigUnknown ?
+            QAudioFormat::defaultChannelConfigForChannelCount(audioFormat.channelCount()) :
+            audioFormat.channelConfig();
+
+    const auto mask = QFFmpegMediaFormatInfo::avChannelLayout(channelConfig);
+
+#if QT_FFMPEG_OLD_CHANNEL_LAYOUT
+    channelLayoutMask = mask;
+#else
+    av_channel_layout_from_mask(&channelLayout, mask);
+#endif
+}
+
+SwrContextUPtr createResampleContext(const ResampleAudioFormat& inputFormat,
+                                     const ResampleAudioFormat& outputFormat)
+{
+    SwrContext *resampler = nullptr;
+#if QT_FFMPEG_OLD_CHANNEL_LAYOUT
+    resampler = swr_alloc_set_opts(nullptr,
+                                   outputFormat.channelLayoutMask,
+                                   outputFormat.sampleFormat,
+                                   outputFormat.sampleRate,
+                                   inputFormat.channelLayoutMask,
+                                   inputFormat.sampleFormat,
+                                   inputFormat.sampleRate,
+                                   0,
+                                   nullptr);
+#else
+    swr_alloc_set_opts2(&resampler,
+                        &outputFormat.channelLayout,
+                        outputFormat.sampleFormat,
+                        outputFormat.sampleRate,
+                        &inputFormat.channelLayout,
+                        inputFormat.sampleFormat,
+                        inputFormat.sampleRate,
+                        0,
+                        nullptr);
+#endif
+
+    swr_init(resampler);
+    return SwrContextUPtr(resampler);
+}
+
 #ifdef Q_OS_DARWIN
 bool isCVFormatSupported(uint32_t cvFormat)
 {