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Merge "vp8: Updates for adaptive denoiser mode."

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Marco 2014-09-09 10:19:27 -07:00 committed by Gerrit Code Review
commit 619951af97
3 changed files with 38 additions and 9 deletions
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19
vp8/encoder/denoising.c
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@ -412,12 +412,27 @@ int vp8_denoiser_allocate(VP8_DENOISER *denoiser, int width, int height,
vp8_denoiser_set_parameters(denoiser, mode);
denoiser->nmse_source_diff = 0;
denoiser->nmse_source_diff_count = 0;
denoiser->qp_avg = 0;
// QP threshold below which we can go up to aggressive mode.
denoiser->qp_threshold_up = 80;
// QP threshold above which we can go back down to normal mode.
// For now keep this second threshold high, so not used currently.
denoiser->qp_threshold_down = 128;
// Bitrate thresholds and noise metric (nmse) thresholds for switching to
// aggressive mode.
// TODO(marpan): Adjust thresholds, including effect on resolution.
denoiser->bitrate_threshold = 200000; // (bits/sec).
denoiser->threshold_aggressive_mode = 35;
if (width * height > 640 * 480)
if (width * height > 640 * 480) {
denoiser->bitrate_threshold = 500000;
denoiser->threshold_aggressive_mode = 100;
} else if (width * height > 960 * 540) {
denoiser->bitrate_threshold = 800000;
denoiser->threshold_aggressive_mode = 150;
else if (width * height > 1280 * 720)
} else if (width * height > 1280 * 720) {
denoiser->bitrate_threshold = 2000000;
denoiser->threshold_aggressive_mode = 1400;
}
return 0;
}

6
vp8/encoder/denoising.h
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@ -19,7 +19,7 @@ extern "C" {
#endif
#define SUM_DIFF_THRESHOLD (16 * 16 * 2)
#define SUM_DIFF_THRESHOLD_HIGH (16 * 16 * 3)
#define SUM_DIFF_THRESHOLD_HIGH (600)
#define MOTION_MAGNITUDE_THRESHOLD (8*3)
#define SUM_DIFF_THRESHOLD_UV (96) // (8 * 8 * 1.5)
@ -81,6 +81,10 @@ typedef struct vp8_denoiser
int threshold_aggressive_mode;
int nmse_source_diff;
int nmse_source_diff_count;
int qp_avg;
int qp_threshold_up;
int qp_threshold_down;
int bitrate_threshold;
denoise_params denoise_pars;
} VP8_DENOISER;

22
vp8/encoder/onyx_if.c
View File

@ -3370,33 +3370,43 @@ static void process_denoiser_mode_change(VP8_COMP *cpi) {
if (total > 0 &&
(num_blocks > (tot_num_blocks >> 4))) {
// Update the recursive mean square source_diff.
if (cpi->denoiser.nmse_source_diff_count == 0)
if (cpi->denoiser.nmse_source_diff_count == 0) {
// First sample in new interval.
cpi->denoiser.nmse_source_diff = total;
else
cpi->denoiser.qp_avg = cm->base_qindex;
} else {
// For subsequent samples, use average with weight ~1/4 for new sample.
cpi->denoiser.nmse_source_diff = (int)((total >> 2) +
3 * (cpi->denoiser.nmse_source_diff >> 2));
cpi->denoiser.qp_avg = (int)((cm->base_qindex >> 2) +
3 * (cpi->denoiser.qp_avg >> 2));
}
cpi->denoiser.nmse_source_diff_count++;
}
// Check for changing the denoiser mode, when we have obtained #samples =
// num_mode_change.
// num_mode_change. Condition the change also on the bitrate and QP.
if (cpi->denoiser.nmse_source_diff_count == num_mode_change) {
// Check for going up: from normal to aggressive mode.
if ((cpi->denoiser.denoiser_mode == kDenoiserOnYUV) &&
(cpi->denoiser.nmse_source_diff >
cpi->denoiser.threshold_aggressive_mode)) {
cpi->denoiser.threshold_aggressive_mode) &&
(cpi->denoiser.qp_avg < cpi->denoiser.qp_threshold_up &&
cpi->target_bandwidth > cpi->denoiser.bitrate_threshold)) {
vp8_denoiser_set_parameters(&cpi->denoiser, kDenoiserOnYUVAggressive);
} else {
// Check for going down: from aggressive to normal mode.
if ((cpi->denoiser.denoiser_mode == kDenoiserOnYUVAggressive) &&
if (((cpi->denoiser.denoiser_mode == kDenoiserOnYUVAggressive) &&
(cpi->denoiser.nmse_source_diff <
cpi->denoiser.threshold_aggressive_mode)) {
cpi->denoiser.threshold_aggressive_mode)) ||
((cpi->denoiser.denoiser_mode == kDenoiserOnYUVAggressive) &&
(cpi->denoiser.qp_avg > cpi->denoiser.qp_threshold_down ||
cpi->target_bandwidth < cpi->denoiser.bitrate_threshold))) {
vp8_denoiser_set_parameters(&cpi->denoiser, kDenoiserOnYUV);
}
}
// Reset metric and counter for next interval.
cpi->denoiser.nmse_source_diff = 0;
cpi->denoiser.qp_avg = 0;
cpi->denoiser.nmse_source_diff_count = 0;
}
}