public static void loopFilter(VP8Frame frame) {
frame.fireLFProgressUpdate(0);
if (frame.getFilterType() == 2) {
loopFilterUV(frame);
frame.fireLFProgressUpdate(50);
loopFilterY(frame);
} else if (frame.getFilterType() == 1) {
loopFilterSimple(frame);
}
frame.fireLFProgressUpdate(100);
}
public static void loopFilterY(VP8Frame frame) {
for (int y = 0; y < frame.getMacroBlockRows(); y++) {
frame.fireLFProgressUpdate(
50 + (100.0f * ((float) (y + 1) / (float) (frame.getMacroBlockRows()))) / 2);
for (int x = 0; x < frame.getMacroBlockCols(); x++) {
MacroBlock rmb = frame.getMacroBlock(x, y);
MacroBlock bmb = frame.getMacroBlock(x, y);
int sharpnessLevel = frame.getSharpnessLevel();
int loop_filter_level = rmb.getFilterLevel();
if (loop_filter_level != 0) {
int interior_limit = rmb.getFilterLevel();
if (sharpnessLevel > 0) {
interior_limit >>= sharpnessLevel > 4 ? 2 : 1;
if (interior_limit > 9 - sharpnessLevel) interior_limit = 9 - sharpnessLevel;
}
if (interior_limit == 0) interior_limit = 1;
int hev_threshold = 0;
if (frame.getFrameType() == 0) /* current frame is a key frame */ {
if (loop_filter_level >= 40) hev_threshold = 2;
else if (loop_filter_level >= 15) hev_threshold = 1;
} else /* current frame is an interframe */ {
if (loop_filter_level >= 40) hev_threshold = 3;
else if (loop_filter_level >= 20) hev_threshold = 2;
else if (loop_filter_level >= 15) hev_threshold = 1;
}
/* Luma and Chroma use the same inter-macroblock edge limit */
int mbedge_limit = ((loop_filter_level + 2) * 2) + interior_limit;
/* Luma and Chroma use the same inter-subblock edge limit */
int sub_bedge_limit = (loop_filter_level * 2) + interior_limit;
// left
if (x > 0) {
MacroBlock lmb = frame.getMacroBlock(x - 1, y);
for (int b = 0; b < 4; b++) {
SubBlock rsb = rmb.getSubBlock(SubBlock.PLANE.Y1, 0, b);
SubBlock lsb = lmb.getSubBlock(SubBlock.PLANE.Y1, 3, b);
for (int a = 0; a < 4; a++) {
Segment seg = getSegH(rsb, lsb, a);
MBfilter(hev_threshold, interior_limit, mbedge_limit, seg);
setSegH(rsb, lsb, seg, a);
}
}
}
// sb left
if (!rmb.isSkip_inner_lf()) {
for (int a = 1; a < 4; a++) {
for (int b = 0; b < 4; b++) {
SubBlock lsb = rmb.getSubBlock(SubBlock.PLANE.Y1, a - 1, b);
SubBlock rsb = rmb.getSubBlock(SubBlock.PLANE.Y1, a, b);
for (int c = 0; c < 4; c++) {
// System.out.println("sbleft a:"+a+" b:"+b+" c:"+c);
Segment seg = getSegH(rsb, lsb, c);
subblock_filter(hev_threshold, interior_limit, sub_bedge_limit, seg);
setSegH(rsb, lsb, seg, c);
}
}
}
}
// top
if (y > 0) {
MacroBlock tmb = frame.getMacroBlock(x, y - 1);
for (int b = 0; b < 4; b++) {
SubBlock tsb = tmb.getSubBlock(SubBlock.PLANE.Y1, b, 3);
SubBlock bsb = bmb.getSubBlock(SubBlock.PLANE.Y1, b, 0);
for (int a = 0; a < 4; a++) {
Segment seg = getSegV(bsb, tsb, a);
MBfilter(hev_threshold, interior_limit, mbedge_limit, seg);
setSegV(bsb, tsb, seg, a);
}
}
}
// sb top
if (!rmb.isSkip_inner_lf()) {
for (int a = 1; a < 4; a++) {
for (int b = 0; b < 4; b++) {
SubBlock tsb = bmb.getSubBlock(SubBlock.PLANE.Y1, b, a - 1);
SubBlock bsb = bmb.getSubBlock(SubBlock.PLANE.Y1, b, a);
for (int c = 0; c < 4; c++) {
Segment seg = getSegV(bsb, tsb, c);
subblock_filter(hev_threshold, interior_limit, sub_bedge_limit, seg);
setSegV(bsb, tsb, seg, c);
}
}
}
}
}
}
}
}
public static void loopFilterSimple(VP8Frame frame) {
for (int y = 0; y < frame.getMacroBlockRows(); y++) {
frame.fireLFProgressUpdate(
(100.0f * ((float) (y + 1) / (float) (frame.getMacroBlockRows()))));
for (int x = 0; x < frame.getMacroBlockCols(); x++) {
// System.out.println("x: "+x+" y: "+y);
MacroBlock rmb = frame.getMacroBlock(x, y);
MacroBlock bmb = frame.getMacroBlock(x, y);
int loop_filter_level = rmb.getFilterLevel();
if (loop_filter_level != 0) {
int interior_limit = rmb.getFilterLevel();
int sharpnessLevel = frame.getSharpnessLevel();
if (sharpnessLevel > 0) {
interior_limit >>= sharpnessLevel > 4 ? 2 : 1;
if (interior_limit > 9 - sharpnessLevel) interior_limit = 9 - sharpnessLevel;
}
if (interior_limit == 0) interior_limit = 1;
/* Luma and Chroma use the same inter-subblock edge limit */
int sub_bedge_limit = (loop_filter_level * 2) + interior_limit;
if (sub_bedge_limit < 1) sub_bedge_limit = 1;
/* Luma and Chroma use the same inter-macroblock edge limit */
int mbedge_limit = sub_bedge_limit + 4;
// left
if (x > 0) {
MacroBlock lmb = frame.getMacroBlock(x - 1, y);
for (int b = 0; b < 4; b++) {
SubBlock rsb = rmb.getSubBlock(SubBlock.PLANE.Y1, 0, b);
SubBlock lsb = lmb.getSubBlock(SubBlock.PLANE.Y1, 3, b);
for (int a = 0; a < 4; a++) {
Segment seg = getSegH(rsb, lsb, a);
// MBfilter(hev_threshold, interior_limit,
// mbedge_limit, seg);
// System.out.println(mbedge_limit);
simple_segment(mbedge_limit, seg);
setSegH(rsb, lsb, seg, a);
}
}
}
// sb left
if (!rmb.isSkip_inner_lf()) {
for (int a = 1; a < 4; a++) {
for (int b = 0; b < 4; b++) {
SubBlock lsb = rmb.getSubBlock(SubBlock.PLANE.Y1, a - 1, b);
SubBlock rsb = rmb.getSubBlock(SubBlock.PLANE.Y1, a, b);
for (int c = 0; c < 4; c++) {
// System.out.println("sbleft a:"+a+" b:"+b+" c:"+c);
Segment seg = getSegH(rsb, lsb, c);
simple_segment(sub_bedge_limit, seg);
// System.out.println(sub_bedge_limit);
// subblock_filter(hev_threshold,interior_limit,sub_bedge_limit,
// seg);
setSegH(rsb, lsb, seg, c);
}
}
}
}
// top
if (y > 0) {
MacroBlock tmb = frame.getMacroBlock(x, y - 1);
for (int b = 0; b < 4; b++) {
SubBlock tsb = tmb.getSubBlock(SubBlock.PLANE.Y1, b, 3);
SubBlock bsb = bmb.getSubBlock(SubBlock.PLANE.Y1, b, 0);
for (int a = 0; a < 4; a++) {
Segment seg = getSegV(bsb, tsb, a);
simple_segment(mbedge_limit, seg);
// System.out.println(mbedge_limit);
// MBfilter(hev_threshold, interior_limit,
// mbedge_limit, seg);
setSegV(bsb, tsb, seg, a);
}
}
}
// sb top
if (!rmb.isSkip_inner_lf()) {
for (int a = 1; a < 4; a++) {
for (int b = 0; b < 4; b++) {
SubBlock tsb = bmb.getSubBlock(SubBlock.PLANE.Y1, b, a - 1);
SubBlock bsb = bmb.getSubBlock(SubBlock.PLANE.Y1, b, a);
for (int c = 0; c < 4; c++) {
// System.out.println("sbtop");
Segment seg = getSegV(bsb, tsb, c);
simple_segment(sub_bedge_limit, seg);
// System.out.println(sub_bedge_limit);
// subblock_filter(hev_threshold,interior_limit,sub_bedge_limit,
// seg);
setSegV(bsb, tsb, seg, c);
}
}
}
}
}
}
}
}
