diff options
Diffstat (limited to 'vp8/encoder/ratectrl.c')
| -rw-r--r-- | vp8/encoder/ratectrl.c | 90 |
1 files changed, 28 insertions, 62 deletions
diff --git a/vp8/encoder/ratectrl.c b/vp8/encoder/ratectrl.c index 9c8e86bb4..09a69bc71 100644 --- a/vp8/encoder/ratectrl.c +++ b/vp8/encoder/ratectrl.c @@ -662,8 +662,6 @@ void vp8_calc_pframe_target_size(VP8_COMP *cpi) int min_frame_target; int Adjustment; - // Set the min frame bandwidth. - //min_frame_target = estimate_min_frame_size( cpi ); min_frame_target = 0; if (cpi->pass == 2) @@ -817,11 +815,6 @@ void vp8_calc_pframe_target_size(VP8_COMP *cpi) } } - // Set a reduced data rate target for our initial Q calculation. - // This should help to save bits during earier sections. - if ((cpi->oxcf.under_shoot_pct > 0) && (cpi->oxcf.under_shoot_pct <= 100)) - cpi->this_frame_target = (cpi->this_frame_target * cpi->oxcf.under_shoot_pct) / 100; - // Sanity check that the total sum of adjustments is not above the maximum allowed // That is that having allowed for KF and GF penalties we have not pushed the // current interframe target to low. If the adjustment we apply here is not capable of recovering @@ -858,11 +851,6 @@ void vp8_calc_pframe_target_size(VP8_COMP *cpi) percent_low = (cpi->oxcf.optimal_buffer_level - cpi->buffer_level) / one_percent_bits; - - if (percent_low > 100) - percent_low = 100; - else if (percent_low < 0) - percent_low = 0; } // Are we overshooting the long term clip data rate... else if (cpi->bits_off_target < 0) @@ -870,16 +858,16 @@ void vp8_calc_pframe_target_size(VP8_COMP *cpi) // Adjust per frame data target downwards to compensate. percent_low = (int)(100 * -cpi->bits_off_target / (cpi->total_byte_count * 8)); - - if (percent_low > 100) - percent_low = 100; - else if (percent_low < 0) - percent_low = 0; } + if (percent_low > cpi->oxcf.under_shoot_pct) + percent_low = cpi->oxcf.under_shoot_pct; + else if (percent_low < 0) + percent_low = 0; + // lower the target bandwidth for this frame. - cpi->this_frame_target = - (cpi->this_frame_target * (100 - (percent_low / 2))) / 100; + cpi->this_frame_target -= (cpi->this_frame_target * percent_low) + / 200; // Are we using allowing control of active_worst_allowed_q // according to buffer level. @@ -950,20 +938,29 @@ void vp8_calc_pframe_target_size(VP8_COMP *cpi) } else { - int percent_high; + int percent_high = 0; - if (cpi->bits_off_target > cpi->oxcf.optimal_buffer_level) + if ((cpi->oxcf.end_usage == USAGE_STREAM_FROM_SERVER) + && (cpi->buffer_level > cpi->oxcf.optimal_buffer_level)) { - percent_high = (int)(100 * (cpi->bits_off_target - cpi->oxcf.optimal_buffer_level) / (cpi->total_byte_count * 8)); + percent_high = (cpi->buffer_level + - cpi->oxcf.optimal_buffer_level) + / one_percent_bits; + } + else if (cpi->bits_off_target > cpi->oxcf.optimal_buffer_level) + { + percent_high = (int)((100 * cpi->bits_off_target) + / (cpi->total_byte_count * 8)); + } - if (percent_high > 100) - percent_high = 100; - else if (percent_high < 0) - percent_high = 0; + if (percent_high > cpi->oxcf.over_shoot_pct) + percent_high = cpi->oxcf.over_shoot_pct; + else if (percent_high < 0) + percent_high = 0; - cpi->this_frame_target = (cpi->this_frame_target * (100 + (percent_high / 2))) / 100; + cpi->this_frame_target += (cpi->this_frame_target * + percent_high) / 200; - } // Are we allowing control of active_worst_allowed_q according to bufferl level. if (cpi->auto_worst_q) @@ -1419,39 +1416,6 @@ int vp8_regulate_q(VP8_COMP *cpi, int target_bits_per_frame) return Q; } -static int estimate_min_frame_size(VP8_COMP *cpi) -{ - double correction_factor; - int bits_per_mb_at_max_q; - - // This funtion returns a default value for the first few frames untill the correction factor has had time to adapt. - if (cpi->common.current_video_frame < 10) - { - if (cpi->pass == 2) - return (cpi->min_frame_bandwidth); - else - return cpi->per_frame_bandwidth / 3; - } - - /* // Select the appropriate correction factor based upon type of frame. - if ( cpi->common.frame_type == KEY_FRAME ) - correction_factor = cpi->key_frame_rate_correction_factor; - else - { - if ( cpi->common.refresh_alt_ref_frame || cpi->common.refresh_golden_frame ) - correction_factor = cpi->gf_rate_correction_factor; - else - correction_factor = cpi->rate_correction_factor; - }*/ - - // We estimate at half the value we get from vp8_bits_per_mb - correction_factor = cpi->rate_correction_factor / 2.0; - - bits_per_mb_at_max_q = (int)(.5 + correction_factor * vp8_bits_per_mb[cpi->common.frame_type][MAXQ]); - - return (bits_per_mb_at_max_q * cpi->common.MBs) >> BPER_MB_NORMBITS; -} - static int estimate_keyframe_frequency(VP8_COMP *cpi) { @@ -1468,8 +1432,10 @@ static int estimate_keyframe_frequency(VP8_COMP *cpi) /* Assume a default of 1 kf every 2 seconds, or the max kf interval, * whichever is smaller. */ + int key_freq = cpi->oxcf.key_freq>0 ? cpi->oxcf.key_freq : 1; av_key_frame_frequency = (int)cpi->output_frame_rate * 2; - if (av_key_frame_frequency > cpi->oxcf.key_freq) + + if (cpi->oxcf.auto_key && av_key_frame_frequency > key_freq) av_key_frame_frequency = cpi->oxcf.key_freq; cpi->prior_key_frame_distance[KEY_FRAME_CONTEXT - 1] |