mirror of
https://github.com/mollyim/webrtc.git
synced 2025-05-14 14:20:45 +01:00
b0588e6368
Reland after fixes for ramp-up-tests original reviewed on: https://webrtc-review.googlesource.com/95182 TBR=mbonadei@webrtc.org,ilnik@webrtc.org,sprang@webrtc.org,srte@webrtc.org,perkj@webrtc.org,titovartem@webrtc.org Bug: none Change-Id: I4f9af0c98a0341dd4fadd5184bb85d7511efbdc0 Reviewed-on: https://webrtc-review.googlesource.com/96120 Reviewed-by: Erik Språng <sprang@webrtc.org> Reviewed-by: Stefan Holmer <stefan@webrtc.org> Reviewed-by: Ilya Nikolaevskiy <ilnik@webrtc.org> Reviewed-by: Mirko Bonadei <mbonadei@webrtc.org> Commit-Queue: Ilya Nikolaevskiy <ilnik@webrtc.org> Cr-Commit-Position: refs/heads/master@{#24450}
54 lines
1.8 KiB
C++
54 lines
1.8 KiB
C++
/*
|
|
* Copyright (c) 2016 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.
|
|
*/
|
|
|
|
#include "modules/video_coding/utility/default_video_bitrate_allocator.h"
|
|
|
|
#include <stdint.h>
|
|
|
|
#include <algorithm>
|
|
|
|
namespace webrtc {
|
|
|
|
DefaultVideoBitrateAllocator::DefaultVideoBitrateAllocator(
|
|
const VideoCodec& codec)
|
|
: codec_(codec) {}
|
|
|
|
DefaultVideoBitrateAllocator::~DefaultVideoBitrateAllocator() {}
|
|
|
|
// TODO(http://crbug.com/webrtc/9671): Do not split bitrate between simulcast
|
|
// streams, but allocate everything to the first stream.
|
|
VideoBitrateAllocation DefaultVideoBitrateAllocator::GetAllocation(
|
|
uint32_t total_bitrate_bps,
|
|
uint32_t framerate) {
|
|
VideoBitrateAllocation allocation;
|
|
if (total_bitrate_bps == 0 || !codec_.active)
|
|
return allocation;
|
|
|
|
uint32_t allocated_bitrate_bps = total_bitrate_bps;
|
|
allocated_bitrate_bps =
|
|
std::max(allocated_bitrate_bps, codec_.minBitrate * 1000);
|
|
if (codec_.maxBitrate > 0) {
|
|
allocated_bitrate_bps =
|
|
std::min(allocated_bitrate_bps, codec_.maxBitrate * 1000);
|
|
}
|
|
size_t num_simulcast_streams =
|
|
std::max<size_t>(1, codec_.numberOfSimulcastStreams);
|
|
// The bitrate is split between all the streams in proportion of powers of 2
|
|
// e.g. 1:2, 1:2:4, etc.
|
|
for (size_t i = 0; i < num_simulcast_streams; i++) {
|
|
allocation.SetBitrate(
|
|
i, 0,
|
|
allocated_bitrate_bps * (1 << i) / ((1 << num_simulcast_streams) - 1));
|
|
}
|
|
|
|
return allocation;
|
|
}
|
|
|
|
} // namespace webrtc
|