Repo created

TMessagesProj/jni/voip/webrtc/api/video_codecs/video_decoder.h

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+/*
+ *  Copyright (c) 2014 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_H_
+#define API_VIDEO_CODECS_VIDEO_DECODER_H_
+
+#include <memory>
+#include <string>
+#include <vector>
+
+#include "absl/types/optional.h"
+#include "api/video/encoded_image.h"
+#include "api/video/render_resolution.h"
+#include "api/video/video_codec_type.h"
+#include "api/video/video_frame.h"
+#include "rtc_base/system/rtc_export.h"
+
+namespace webrtc {
+
+class RTC_EXPORT DecodedImageCallback {
+ public:
+  virtual ~DecodedImageCallback() {}
+
+  virtual int32_t Decoded(VideoFrame& decodedImage) = 0;
+  // Provides an alternative interface that allows the decoder to specify the
+  // decode time excluding waiting time for any previous pending frame to
+  // return. This is necessary for breaking positive feedback in the delay
+  // estimation when the decoder has a single output buffer.
+  virtual int32_t Decoded(VideoFrame& decodedImage, int64_t decode_time_ms);
+
+  // TODO(sakal): Remove other implementations when upstream projects have been
+  // updated.
+  virtual void Decoded(VideoFrame& decodedImage,
+                       absl::optional<int32_t> decode_time_ms,
+                       absl::optional<uint8_t> qp);
+};
+
+class RTC_EXPORT VideoDecoder {
+ public:
+  struct DecoderInfo {
+    // Descriptive name of the decoder implementation.
+    std::string implementation_name;
+
+    // True if the decoder is backed by hardware acceleration.
+    bool is_hardware_accelerated = false;
+
+    std::string ToString() const;
+    bool operator==(const DecoderInfo& rhs) const;
+    bool operator!=(const DecoderInfo& rhs) const { return !(*this == rhs); }
+  };
+
+  class Settings {
+   public:
+    Settings() = default;
+    Settings(const Settings&) = default;
+    Settings& operator=(const Settings&) = default;
+    ~Settings() = default;
+
+    // The size of pool which is used to store video frame buffers inside
+    // decoder. If value isn't present some codec-default value will be used. If
+    // value is present and decoder doesn't have buffer pool the value will be
+    // ignored.
+    absl::optional<int> buffer_pool_size() const;
+    void set_buffer_pool_size(absl::optional<int> value);
+
+    // When valid, user of the VideoDecoder interface shouldn't `Decode`
+    // encoded images with render resolution larger than width and height
+    // specified here.
+    RenderResolution max_render_resolution() const;
+    void set_max_render_resolution(RenderResolution value);
+
+    // Maximum number of cpu cores the decoder is allowed to use in parallel.
+    // Must be positive.
+    int number_of_cores() const { return number_of_cores_; }
+    void set_number_of_cores(int value);
+
+    // Codec of encoded images user of the VideoDecoder interface will `Decode`.
+    VideoCodecType codec_type() const { return codec_type_; }
+    void set_codec_type(VideoCodecType value) { codec_type_ = value; }
+
+   private:
+    absl::optional<int> buffer_pool_size_;
+    RenderResolution max_resolution_;
+    int number_of_cores_ = 1;
+    VideoCodecType codec_type_ = kVideoCodecGeneric;
+  };
+
+  virtual ~VideoDecoder() = default;
+
+  // Prepares decoder to handle incoming encoded frames. Can be called multiple
+  // times, in such case only latest `settings` are in effect.
+  virtual bool Configure(const Settings& settings) = 0;
+
+  // TODO(bugs.webrtc.org/15444): Make pure virtual once all subclasses have
+  // migrated to implementing this class.
+  virtual int32_t Decode(const EncodedImage& input_image,
+                         int64_t render_time_ms) {
+    return Decode(input_image, /*missing_frame=*/false, render_time_ms);
+  }
+
+  // TODO(bugs.webrtc.org/15444): Migrate all subclasses to Decode() without
+  // missing_frame and delete this.
+  virtual int32_t Decode(const EncodedImage& input_image,
+                         bool missing_frames,
+                         int64_t render_time_ms) {
+    return Decode(input_image, render_time_ms);
+  }
+
+  virtual int32_t RegisterDecodeCompleteCallback(
+      DecodedImageCallback* callback) = 0;
+
+  virtual int32_t Release() = 0;
+
+  virtual DecoderInfo GetDecoderInfo() const;
+
+  // Deprecated, use GetDecoderInfo().implementation_name instead.
+  virtual const char* ImplementationName() const;
+};
+
+inline absl::optional<int> VideoDecoder::Settings::buffer_pool_size() const {
+  return buffer_pool_size_;
+}
+
+inline void VideoDecoder::Settings::set_buffer_pool_size(
+    absl::optional<int> value) {
+  buffer_pool_size_ = value;
+}
+
+inline RenderResolution VideoDecoder::Settings::max_render_resolution() const {
+  return max_resolution_;
+}
+
+inline void VideoDecoder::Settings::set_max_render_resolution(
+    RenderResolution value) {
+  max_resolution_ = value;
+}
+
+}  // namespace webrtc
+
+#endif  // API_VIDEO_CODECS_VIDEO_DECODER_H_