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Ensure that the first active layer isn't disabled by too low input resolution

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If e.g. CPU adaptation reduces input video size too much, video pipeline would
reduce the number of used simulcast streams/spatial layers. This may result in
disabled video if some streams are disabled by Rtp encoding parameters API.

Bug: webrtc:11319
Change-Id: Id7f157255599dcb6f494129b83477cda4bea982a
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/168480
Reviewed-by: Evan Shrubsole <eshr@google.com>
Commit-Queue: Ilya Nikolaevskiy <ilnik@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#30498}
This commit is contained in:
Ilya Nikolaevskiy
2020-02-11 12:50:38 +01:00
committed by Commit Bot
parent ccd49d9af6
commit 03d909634b
12 changed files with 152 additions and 47 deletions
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12
modules/video_coding/video_codec_initializer.cc
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@ -179,9 +179,19 @@ VideoCodec VideoCodecInitializer::VideoEncoderConfigToVideoCodec(
// Layering is set explicitly.
spatial_layers = config.spatial_layers;
} else {
size_t min_required_layers = 0;
// Need at least enough layers for the first active one to be present.
for (size_t spatial_idx = 0;
spatial_idx < config.simulcast_layers.size(); ++spatial_idx) {
if (config.simulcast_layers[spatial_idx].active) {
min_required_layers = spatial_idx + 1;
break;
}
}
spatial_layers = GetSvcConfig(
video_codec.width, video_codec.height, video_codec.maxFramerate,
video_codec.VP9()->numberOfSpatialLayers,
min_required_layers, video_codec.VP9()->numberOfSpatialLayers,
video_codec.VP9()->numberOfTemporalLayers,
video_codec.mode == VideoCodecMode::kScreensharing);