mirror of
https://github.com/mollyim/webrtc.git
synced 2025-05-14 06:10:40 +01:00
38ac7bf0ab
Simple function to check if the frame described by Vp8FrameConfig will be an intra frame. Bug: None Change-Id: I0ba0476762a152e1be3711352024fc6e1bd35f12 Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/133560 Reviewed-by: Erik Språng <sprang@webrtc.org> Commit-Queue: Elad Alon <eladalon@webrtc.org> Cr-Commit-Position: refs/heads/master@{#27709}
98 lines
3.2 KiB
C++
98 lines
3.2 KiB
C++
/*
|
|
* Copyright (c) 2019 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_VP8_FRAME_CONFIG_H_
|
|
#define API_VIDEO_CODECS_VP8_FRAME_CONFIG_H_
|
|
|
|
#include <stdint.h>
|
|
|
|
namespace webrtc {
|
|
|
|
struct Vp8FrameConfig {
|
|
enum BufferFlags : int {
|
|
kNone = 0,
|
|
kReference = 1,
|
|
kUpdate = 2,
|
|
kReferenceAndUpdate = kReference | kUpdate,
|
|
};
|
|
|
|
enum FreezeEntropy { kFreezeEntropy };
|
|
|
|
// Defined bit-maskable reference to the three buffers available in VP8.
|
|
enum class Vp8BufferReference : uint8_t {
|
|
kNone = 0,
|
|
kLast = 1,
|
|
kGolden = 2,
|
|
kAltref = 4
|
|
};
|
|
|
|
Vp8FrameConfig();
|
|
|
|
Vp8FrameConfig(BufferFlags last, BufferFlags golden, BufferFlags arf);
|
|
Vp8FrameConfig(BufferFlags last,
|
|
BufferFlags golden,
|
|
BufferFlags arf,
|
|
FreezeEntropy);
|
|
|
|
enum class Buffer : int { kLast = 0, kGolden = 1, kArf = 2, kCount };
|
|
|
|
bool References(Buffer buffer) const;
|
|
|
|
bool Updates(Buffer buffer) const;
|
|
|
|
bool IntraFrame() const {
|
|
// Intra frames do not reference any buffers, and update all buffers.
|
|
return last_buffer_flags == kUpdate && golden_buffer_flags == kUpdate &&
|
|
arf_buffer_flags == kUpdate;
|
|
}
|
|
|
|
bool drop_frame;
|
|
BufferFlags last_buffer_flags;
|
|
BufferFlags golden_buffer_flags;
|
|
BufferFlags arf_buffer_flags;
|
|
|
|
// The encoder layer ID is used to utilize the correct bitrate allocator
|
|
// inside the encoder. It does not control references nor determine which
|
|
// "actual" temporal layer this is. The packetizer temporal index determines
|
|
// which layer the encoded frame should be packetized into.
|
|
// Normally these are the same, but current temporal-layer strategies for
|
|
// screenshare use one bitrate allocator for all layers, but attempt to
|
|
// packetize / utilize references to split a stream into multiple layers,
|
|
// with different quantizer settings, to hit target bitrate.
|
|
// TODO(sprang): Screenshare layers are being reconsidered at the time of
|
|
// writing, we might be able to remove this distinction, and have a temporal
|
|
// layer imply both (the normal case).
|
|
int encoder_layer_id;
|
|
// TODO(eladalon/sprang): Move out of this class.
|
|
int packetizer_temporal_idx;
|
|
|
|
// TODO(eladalon/sprang): Move out of this class.
|
|
bool layer_sync;
|
|
|
|
bool freeze_entropy;
|
|
|
|
// Indicates in which order the encoder should search the reference buffers
|
|
// when doing motion prediction. Set to kNone to use unspecified order. Any
|
|
// buffer indicated here must not have the corresponding no_ref bit set.
|
|
// If all three buffers can be reference, the one not listed here should be
|
|
// searched last.
|
|
Vp8BufferReference first_reference;
|
|
Vp8BufferReference second_reference;
|
|
|
|
private:
|
|
Vp8FrameConfig(BufferFlags last,
|
|
BufferFlags golden,
|
|
BufferFlags arf,
|
|
bool freeze_entropy);
|
|
};
|
|
|
|
} // namespace webrtc
|
|
|
|
#endif // API_VIDEO_CODECS_VP8_FRAME_CONFIG_H_
|