ref: 8d7cd8e75c44b8937fd8eb24ca7f650511880bce
parent: 96cabf8de1364fc074c4bd1bc8ac859fe0239aca
parent: e829487371b2af786e0a3b692d09cf5a95bed667
author: Dmitry Kovalev <dkovalev@google.com>
date: Tue Feb 4 11:57:57 EST 2014
Merge "Removing unused estimate_cq() function."
--- a/vp9/encoder/vp9_firstpass.c
+++ b/vp9/encoder/vp9_firstpass.c
@@ -936,58 +936,6 @@
return q;
}
-// For cq mode estimate a cq level that matches the observed
-// complexity and data rate.
-static int estimate_cq(VP9_COMP *cpi,
- FIRSTPASS_STATS *fpstats,
- int section_target_bandwitdh) {- int q;
- int num_mbs = cpi->common.MBs;
- int target_norm_bits_per_mb;
-
- double section_err = (fpstats->coded_error / fpstats->count);
- double err_per_mb = section_err / num_mbs;
- double err_correction_factor;
- double clip_iiratio;
- double clip_iifactor;
-
- target_norm_bits_per_mb = (section_target_bandwitdh < (1 << 20))
- ? (512 * section_target_bandwitdh) / num_mbs
- : 512 * (section_target_bandwitdh / num_mbs);
-
-
- // II ratio correction factor for clip as a whole
- clip_iiratio = cpi->twopass.total_stats.intra_error /
- DOUBLE_DIVIDE_CHECK(cpi->twopass.total_stats.coded_error);
- clip_iifactor = 1.0 - ((clip_iiratio - 10.0) * 0.025);
- if (clip_iifactor < 0.80)
- clip_iifactor = 0.80;
-
- // Try and pick a Q that can encode the content at the given rate.
- for (q = 0; q < MAXQ; q++) {- int bits_per_mb_at_this_q;
-
- // Error per MB based correction factor
- err_correction_factor =
- calc_correction_factor(err_per_mb, 100.0, 0.5, 0.90, q) * clip_iifactor;
-
- bits_per_mb_at_this_q =
- vp9_rc_bits_per_mb(INTER_FRAME, q, err_correction_factor);
-
- if (bits_per_mb_at_this_q <= target_norm_bits_per_mb)
- break;
- }
-
- // Clip value to range "best allowed to (worst allowed - 1)"
- q = select_cq_level(q);
- if (q >= cpi->rc.worst_quality)
- q = cpi->rc.worst_quality - 1;
- if (q < cpi->rc.best_quality)
- q = cpi->rc.best_quality;
-
- return q;
-}
-
extern void vp9_new_framerate(VP9_COMP *cpi, double framerate);
void vp9_init_second_pass(VP9_COMP *cpi) {