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Rate control fix for ARNR filtered frames.

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Previously we had assumed that it was necessary to give a full frame's
bit allocation to the alt ref frame if it has been created through temporal
filtering. This is not the case. The active max quantizer control
insures that sufficient bits are allocated if needed and allocating a
full frame's worth of bits creates an excessive overhead for the ARF.

Change-Id: I83c95ed7bc7ce0e53ccae6ff32db5a97f145937a
This commit is contained in:
Paul Wilkins 2010-07-19 14:10:07 +01:00
parent 7c938f4d3c
commit bf18069ceb
2 changed files with 5 additions and 16 deletions
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13
vp8/encoder/onyx_if.c
View File

@ -4960,20 +4960,7 @@ int vp8_get_compressed_data(VP8_PTR ptr, unsigned int *frame_flags, unsigned lon
{
if (cpi->source_encode_index == cpi->last_alt_ref_sei)
{
#if VP8_TEMPORAL_ALT_REF
if (cpi->oxcf.arnr_max_frames == 0)
{
cpi->is_src_frame_alt_ref = 1; // copy alt ref
}
else
{
cpi->is_src_frame_alt_ref = 0;
}
#else
cpi->is_src_frame_alt_ref = 1;
#endif
cpi->last_alt_ref_sei = -1;
}
else

8
vp8/encoder/ratectrl.c
View File

@ -1120,10 +1120,12 @@ void vp8_calc_pframe_target_size(VP8_COMP *cpi)
}
// If there is an active ARF at this location use the minimum
// bits on this frame unless it was a contructed arf.
else if (cpi->oxcf.arnr_max_frames == 0)
// bits on this frame even if it is a contructed arf.
// The active maximum quantizer insures that an appropriate
// number of bits will be spent if needed for contstructed ARFs.
else
{
cpi->this_frame_target = 0; // Minimial spend on gf that is replacing an arf
cpi->this_frame_target = 0;
}
cpi->current_gf_interval = cpi->frames_till_gf_update_due;