Adding upstream version 124.0.1.upstream/124.0.1

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 69 insertions, 0 deletions

diff --git a/third_party/libwebrtc/api/video_codecs/video_decoder_factory.h b/third_party/libwebrtc/api/video_codecs/video_decoder_factory.h
new file mode 100644
index 0000000000..7e1d2ee883
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+++ b/third_party/libwebrtc/api/video_codecs/video_decoder_factory.h
@@ -0,0 +1,69 @@
+/*
+ *  Copyright (c) 2017 The WebRTC project authors. All Rights Reserved.
+ *
+ *  Use of this source code is governed by a BSD-style license
+ *  that can be found in the LICENSE file in the root of the source
+ *  tree. An additional intellectual property rights grant can be found
+ *  in the file PATENTS.  All contributing project authors may
+ *  be found in the AUTHORS file in the root of the source tree.
+ */
+
+#ifndef API_VIDEO_CODECS_VIDEO_DECODER_FACTORY_H_
+#define API_VIDEO_CODECS_VIDEO_DECODER_FACTORY_H_
+
+#include <memory>
+#include <string>
+#include <vector>
+
+#include "absl/types/optional.h"
+#include "api/video_codecs/sdp_video_format.h"
+#include "rtc_base/system/rtc_export.h"
+
+namespace webrtc {
+
+class VideoDecoder;
+
+// A factory that creates VideoDecoders.
+// NOTE: This class is still under development and may change without notice.
+class RTC_EXPORT VideoDecoderFactory {
+ public:
+  struct CodecSupport {
+    bool is_supported = false;
+    bool is_power_efficient = false;
+  };
+
+  // Returns a list of supported video formats in order of preference, to use
+  // for signaling etc.
+  virtual std::vector<SdpVideoFormat> GetSupportedFormats() const = 0;
+
+  // Query whether the specifed format is supported or not and if it will be
+  // power efficient, which is currently interpreted as if there is support for
+  // hardware acceleration.
+  // The parameter `reference_scaling` is used to query support for prediction
+  // across spatial layers. An example where support for reference scaling is
+  // needed is if the video stream is produced with a scalability mode that has
+  // a dependency between the spatial layers. See
+  // https://w3c.github.io/webrtc-svc/#scalabilitymodes* for a specification of
+  // different scalabilty modes. NOTE: QueryCodecSupport is currently an
+  // experimental feature that is subject to change without notice.
+  virtual CodecSupport QueryCodecSupport(const SdpVideoFormat& format,
+                                         bool reference_scaling) const {
+    // Default implementation, query for supported formats and check if the
+    // specified format is supported. Returns false if `reference_scaling` is
+    // true.
+    CodecSupport codec_support;
+    codec_support.is_supported =
+        !reference_scaling && format.IsCodecInList(GetSupportedFormats());
+    return codec_support;
+  }
+
+  // Creates a VideoDecoder for the specified format.
+  virtual std::unique_ptr<VideoDecoder> CreateVideoDecoder(
+      const SdpVideoFormat& format) = 0;
+
+  virtual ~VideoDecoderFactory() {}
+};
+
+}  // namespace webrtc
+
+#endif  // API_VIDEO_CODECS_VIDEO_DECODER_FACTORY_H_