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Fix FakeEncoder to produce correct bitrate for several temporal layers

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Also fix retransmission video send stream tests to not depend on actual frames sizes

Also, reduce key-frame scaling factor in FakeEncoder to better reflect real encoders behavior.

Bug: none
Change-Id: I33118160f3fec67ae8e732d9a85f0e9ee0784b7c
Reviewed-on: https://webrtc-review.googlesource.com/c/105642
Commit-Queue: Ilya Nikolaevskiy <ilnik@webrtc.org>
Reviewed-by: Sebastian Jansson <srte@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#25165}
This commit is contained in:
Ilya Nikolaevskiy
2018-10-15 10:47:23 +02:00
committed by Commit Bot
parent a85995ac66
commit 6003e7afe0
2 changed files with 34 additions and 11 deletions
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18
test/fake_encoder.cc
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@ -24,7 +24,16 @@
namespace webrtc {
namespace test {
const int kKeyframeSizeFactor = 10;
const int kKeyframeSizeFactor = 5;
// Inverse of proportion of frames assigned to each temporal layer for all
// possible temporal layers numbers.
const int kTemporalLayerRateFactor[4][4] = {
{1, 0, 0, 0}, // 1/1
{2, 2, 0, 0}, // 1/2 + 1/2
{4, 4, 2, 0}, // 1/4 + 1/4 + 1/2
{8, 8, 4, 2}, // 1/8 + 1/8 + 1/4 + 1/2
};
FakeEncoder::FakeEncoder(Clock* clock)
: clock_(clock),
@ -168,7 +177,9 @@ FakeEncoder::FrameInfo FakeEncoder::NextFrame(
if (frame_info.keyframe) {
layer_info.temporal_id = 0;
size_t avg_frame_size =
(target_bitrate.GetBitrate(i, 0) + 7) / (8 * framerate);
(target_bitrate.GetBitrate(i, 0) + 7) *
kTemporalLayerRateFactor[frame_info.layers.size() - 1][i] /
(8 * framerate);
// The first frame is a key frame and should be larger.
// Store the overshoot bytes and distribute them over the coming frames,
@ -177,7 +188,8 @@ FakeEncoder::FrameInfo FakeEncoder::NextFrame(
layer_info.size = kKeyframeSizeFactor * avg_frame_size;
} else {
size_t avg_frame_size =
(target_bitrate.GetBitrate(i, layer_info.temporal_id) + 7) /
(target_bitrate.GetBitrate(i, layer_info.temporal_id) + 7) *
kTemporalLayerRateFactor[frame_info.layers.size() - 1][i] /
(8 * framerate);
layer_info.size = avg_frame_size;
if (debt_bytes_ > 0) {