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Reland "Enables/disables simulcast streams by allocating a bitrate of 0 to the spatial layer."

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This is a reland of 18c4261339dc76b220e7c805e36b4ea6f3dd161d
Original change's description:
> Enables/disables simulcast streams by allocating a bitrate of 0 to the spatial layer.
>
> Creates VideoStreams & VideoCodec.simulcastStreams with an active field, and then allocates 0 bitrate to simulcast streams that are inactive. This turns off the encoder for specific simulcast streams.
>
> Bug: webrtc:8653
> Change-Id: Id93b03dcd8d1191a7d3300bd77882c8af96ee469
> Reviewed-on: https://webrtc-review.googlesource.com/37740
> Reviewed-by: Stefan Holmer <stefan@webrtc.org>
> Reviewed-by: Taylor Brandstetter <deadbeef@webrtc.org>
> Reviewed-by: Erik Språng <sprang@webrtc.org>
> Commit-Queue: Seth Hampson <shampson@webrtc.org>
> Cr-Commit-Position: refs/heads/master@{#21646}

TBR=sprang@webrtc.org,stefan@webrtc.org,deadbeef@webrtc.org

Bug: webrtc:8630
Change-Id: Ib3df6f9b7158bff362a7ec66fc57e368682c5846
Reviewed-on: https://webrtc-review.googlesource.com/40980
Reviewed-by: Seth Hampson <shampson@webrtc.org>
Reviewed-by: Erik Språng <sprang@webrtc.org>
Commit-Queue: Seth Hampson <shampson@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#21688}
This commit is contained in:
Seth Hampson
2018-01-18 10:39:54 -08:00
committed by Commit Bot
parent 8b10192307
commit 46e31ba5b5
16 changed files with 510 additions and 76 deletions
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10
modules/video_coding/video_codec_initializer.cc
View File

@ -192,6 +192,15 @@ VideoCodec VideoCodecInitializer::VideoEncoderConfigToVideoCodec(
video_codec.numberOfSimulcastStreams =
static_cast<unsigned char>(streams.size());
video_codec.minBitrate = streams[0].min_bitrate_bps / 1000;
bool codec_active = false;
for (const VideoStream& stream : streams) {
if (stream.active) {
codec_active = true;
break;
}
}
// Set active for the entire video codec for the non simulcast case.
video_codec.active = codec_active;
if (video_codec.minBitrate < kEncoderMinBitrateKbps)
video_codec.minBitrate = kEncoderMinBitrateKbps;
video_codec.timing_frame_thresholds = {kDefaultTimingFramesDelayMs,
@ -231,6 +240,7 @@ VideoCodec VideoCodecInitializer::VideoEncoderConfigToVideoCodec(
sim_stream->qpMax = streams[i].max_qp;
sim_stream->numberOfTemporalLayers = static_cast<unsigned char>(
streams[i].temporal_layer_thresholds_bps.size() + 1);
sim_stream->active = streams[i].active;
video_codec.width =
std::max(video_codec.width, static_cast<uint16_t>(streams[i].width));