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Fixes to buffer update for temporal layers.

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When a frame is dropped due to |buffer_level| < 0 for a given temporal layer,
the buffer level for the upper temporal layers was not updated (in calc_pframe_target_size()).
This change fixes that.

Also, use the layer per-frame-bandwidth for updating the buffer level
of the higher layers when a frame is dropped.

Change-Id: I660c23f3229b47e9d124a950b480314b4307c5a8
This commit is contained in:
Marco Paniconi 2013-11-01 11:03:03 -07:00
parent a272530bf0
commit 41138e01f5
2 changed files with 17 additions and 1 deletions
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3
vp8/encoder/onyx_if.c
View File

@ -3574,7 +3574,8 @@ static void encode_frame_to_data_rate
for (i=cpi->current_layer+1; i<cpi->oxcf.number_of_layers; i++)
{
LAYER_CONTEXT *lc = &cpi->layer_context[i];
lc->bits_off_target += cpi->av_per_frame_bandwidth;
lc->bits_off_target += (int)(lc->target_bandwidth /
lc->framerate);
if (lc->bits_off_target > lc->maximum_buffer_size)
lc->bits_off_target = lc->maximum_buffer_size;
lc->buffer_level = lc->bits_off_target;

15
vp8/encoder/ratectrl.c
View File

@ -956,6 +956,21 @@ static void calc_pframe_target_size(VP8_COMP *cpi)
if (cpi->bits_off_target > cpi->oxcf.maximum_buffer_size)
cpi->bits_off_target = (int)cpi->oxcf.maximum_buffer_size;
cpi->buffer_level = cpi->bits_off_target;
if (cpi->oxcf.number_of_layers > 1) {
unsigned int i;
// Propagate bits saved by dropping the frame to higher layers.
for (i = cpi->current_layer + 1; i < cpi->oxcf.number_of_layers;
i++) {
LAYER_CONTEXT *lc = &cpi->layer_context[i];
lc->bits_off_target += (int)(lc->target_bandwidth /
lc->framerate);
if (lc->bits_off_target > lc->maximum_buffer_size)
lc->bits_off_target = lc->maximum_buffer_size;
lc->buffer_level = lc->bits_off_target;
}
}
}
}