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deinterlace: rewrite how neighboring scan lines are calculated
Old code was difficult to understand exactly how the neighboring scan lines are calculated, and it appeared that some were off by +2 or -2, depending on the field flag. Fixes #639321.
This commit is contained in:
David Schleef
Robert Swain
parent
7d9b7abbd4
commit
c2b343cd76
1 changed files with 93 additions and 199 deletions
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@ -307,132 +307,84 @@ gst_deinterlace_simple_method_deinterlace_frame_packed (GstDeinterlaceMethod *
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GstDeinterlaceSimpleMethod *self = GST_DEINTERLACE_SIMPLE_METHOD (method);
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GstDeinterlaceMethodClass *dm_class = GST_DEINTERLACE_METHOD_GET_CLASS (self);
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GstDeinterlaceScanlineData scanlines;
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guint8 *out = GST_BUFFER_DATA (outbuf);
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const guint8 *field0 = NULL, *field1 = NULL, *field2 = NULL, *field3 = NULL;
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guint8 *dest;
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const guint8 *field0, *field1, *field2, *field3;
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gint cur_field_idx = history_count - dm_class->fields_required;
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guint cur_field_flags = history[cur_field_idx].flags;
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gint line;
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gint field_height = self->parent.frame_height / 2;
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gint row_stride = self->parent.row_stride[0];
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gint field_stride = self->parent.row_stride[0] * 2;
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gint i;
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gint frame_height = self->parent.frame_height;
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gint stride = self->parent.row_stride[0];
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g_assert (self->interpolate_scanline_packed != NULL);
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g_assert (self->copy_scanline_packed != NULL);
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dest = GST_BUFFER_DATA (outbuf);
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field0 = GST_BUFFER_DATA (history[cur_field_idx].buf);
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if (history[cur_field_idx].flags & PICTURE_INTERLACED_BOTTOM)
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field0 += row_stride;
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g_assert (dm_class->fields_required <= 4);
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if (dm_class->fields_required >= 2) {
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field1 = GST_BUFFER_DATA (history[cur_field_idx + 1].buf);
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if (history[cur_field_idx + 1].flags & PICTURE_INTERLACED_BOTTOM)
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field1 += row_stride;
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} else {
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field1 = NULL;
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}
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if (dm_class->fields_required >= 3) {
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field2 = GST_BUFFER_DATA (history[cur_field_idx + 2].buf);
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if (history[cur_field_idx + 2].flags & PICTURE_INTERLACED_BOTTOM)
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field2 += row_stride;
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} else {
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field2 = NULL;
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}
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if (dm_class->fields_required >= 4) {
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field3 = GST_BUFFER_DATA (history[cur_field_idx + 3].buf);
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if (history[cur_field_idx + 3].flags & PICTURE_INTERLACED_BOTTOM)
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field3 += row_stride;
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} else {
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field3 = NULL;
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}
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if (cur_field_flags == PICTURE_INTERLACED_BOTTOM) {
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/* double the first scanline of the bottom field */
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memcpy (out, field0, row_stride);
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out += row_stride;
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}
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memcpy (out, field0, row_stride);
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out += row_stride;
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for (line = 2; line <= field_height; line++) {
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#define CLAMP_LOW(i) (((i)<0) ? (i+2) : (i))
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#define CLAMP_HI(i) (((i)>=(frame_height)) ? (i-2) : (i))
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#define LINE(x,i) ((x) + CLAMP_HI(CLAMP_LOW(i)) * (stride))
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#define LINE2(x,i) ((x) ? LINE(x,i) : NULL)
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for (i = 0; i < frame_height; i++) {
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memset (&scanlines, 0, sizeof (scanlines));
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scanlines.bottom_field = (cur_field_flags == PICTURE_INTERLACED_BOTTOM);
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/* interp. scanline */
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scanlines.t0 = field0;
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scanlines.b0 = field0 + field_stride;
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if (!((i & 1) ^ (cur_field_flags == PICTURE_INTERLACED_BOTTOM))) {
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/* copying */
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scanlines.tt0 = LINE2 (field0, (i - 2 >= 0) ? i - 2 : i);
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scanlines.m0 = LINE2 (field0, i);
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scanlines.bb0 = LINE2 (field0, (i + 2 < frame_height ? i + 2 : i));
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if (field1 != NULL) {
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scanlines.tt1 = field1;
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scanlines.m1 = field1 + field_stride;
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scanlines.bb1 = field1 + field_stride * 2;
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field1 += field_stride;
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scanlines.t1 = LINE2 (field1, i - 1);
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scanlines.b1 = LINE2 (field1, i + 1);
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scanlines.tt2 = LINE2 (field2, (i - 2 >= 0) ? i - 2 : i);
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scanlines.m2 = LINE2 (field2, i);
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scanlines.bb2 = LINE2 (field2, (i + 2 < frame_height ? i + 2 : i));
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scanlines.t3 = LINE2 (field3, i - 1);
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scanlines.b3 = LINE2 (field3, i + 1);
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self->copy_scanline_packed (self, LINE (dest, i), &scanlines);
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} else {
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/* interpolating */
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scanlines.t0 = LINE2 (field0, i - 1);
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scanlines.b0 = LINE2 (field0, i + 1);
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scanlines.tt1 = LINE2 (field1, (i - 2 >= 0) ? i - 2 : i);
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scanlines.m1 = LINE2 (field1, i);
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scanlines.bb1 = LINE2 (field1, (i + 2 < frame_height ? i + 2 : i));
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scanlines.t2 = LINE2 (field2, i - 1);
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scanlines.b2 = LINE2 (field2, i + 1);
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scanlines.tt3 = LINE2 (field3, (i - 2 >= 0) ? i - 2 : i);
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scanlines.m3 = LINE2 (field3, i);
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scanlines.bb3 = LINE2 (field3, (i + 2 < frame_height ? i + 2 : i));
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self->interpolate_scanline_packed (self, LINE (dest, i), &scanlines);
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}
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if (field2 != NULL) {
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scanlines.t2 = field2;
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scanlines.b2 = field2 + field_stride;
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}
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if (field3 != NULL) {
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scanlines.tt3 = field3;
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scanlines.m3 = field3 + field_stride;
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scanlines.bb3 = field3 + field_stride * 2;
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field3 += field_stride;
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}
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/* set valid data for corner cases */
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if (line == 2) {
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scanlines.tt1 = scanlines.bb1;
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scanlines.tt3 = scanlines.bb3;
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} else if (line == field_height) {
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scanlines.bb1 = scanlines.tt1;
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scanlines.bb3 = scanlines.tt3;
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}
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self->interpolate_scanline_packed (self, out, &scanlines);
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out += row_stride;
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memset (&scanlines, 0, sizeof (scanlines));
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scanlines.bottom_field = (cur_field_flags == PICTURE_INTERLACED_BOTTOM);
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/* copy a scanline */
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scanlines.tt0 = field0;
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scanlines.m0 = field0 + field_stride;
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scanlines.bb0 = field0 + field_stride * 2;
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field0 += field_stride;
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if (field1 != NULL) {
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scanlines.t1 = field1;
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scanlines.b1 = field1 + field_stride;
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}
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if (field2 != NULL) {
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scanlines.tt2 = field2;
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scanlines.m2 = field2 + field_stride;
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scanlines.bb2 = field2 + field_stride * 2;
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field2 += field_stride;
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}
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if (field3 != NULL) {
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scanlines.t3 = field3;
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scanlines.b3 = field3 + field_stride;
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}
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/* set valid data for corner cases */
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if (line == field_height) {
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scanlines.bb0 = scanlines.tt0;
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scanlines.b1 = scanlines.t1;
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scanlines.bb2 = scanlines.tt2;
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scanlines.b3 = scanlines.t3;
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}
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self->copy_scanline_packed (self, out, &scanlines);
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out += row_stride;
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}
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if (cur_field_flags == PICTURE_INTERLACED_TOP) {
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/* double the last scanline of the top field */
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memcpy (out, field0, row_stride);
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}
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}
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@ -483,111 +435,59 @@ gst_deinterlace_simple_method_copy_scanline_planar_v (GstDeinterlaceSimpleMethod
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static void
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gst_deinterlace_simple_method_deinterlace_frame_planar_plane
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(GstDeinterlaceSimpleMethod * self, guint8 * out, const guint8 * field0,
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(GstDeinterlaceSimpleMethod * self, guint8 * dest, const guint8 * field0,
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const guint8 * field1, const guint8 * field2, const guint8 * field3,
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guint cur_field_flags,
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gint plane, GstDeinterlaceSimpleMethodFunction copy_scanline,
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GstDeinterlaceSimpleMethodFunction interpolate_scanline)
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{
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GstDeinterlaceScanlineData scanlines;
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gint line;
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gint field_height = self->parent.height[plane] / 2;
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gint row_stride = self->parent.row_stride[plane];
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gint field_stride = self->parent.row_stride[plane] * 2;
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gint i;
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gint frame_height = self->parent.height[plane];
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gint stride = self->parent.row_stride[plane];
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g_assert (interpolate_scanline != NULL);
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g_assert (copy_scanline != NULL);
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if (cur_field_flags == PICTURE_INTERLACED_BOTTOM) {
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/* double the first scanline of the bottom field */
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memcpy (out, field0, row_stride);
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out += row_stride;
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}
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memcpy (out, field0, row_stride);
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out += row_stride;
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for (line = 2; line <= field_height; line++) {
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for (i = 0; i < frame_height; i++) {
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memset (&scanlines, 0, sizeof (scanlines));
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scanlines.bottom_field = (cur_field_flags == PICTURE_INTERLACED_BOTTOM);
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/* interp. scanline */
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scanlines.t0 = field0;
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scanlines.b0 = field0 + field_stride;
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if (!((i & 1) ^ (cur_field_flags == PICTURE_INTERLACED_BOTTOM))) {
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/* copying */
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scanlines.tt0 = LINE2 (field0, (i - 2 >= 0) ? i - 2 : i);
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scanlines.m0 = LINE2 (field0, i);
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scanlines.bb0 = LINE2 (field0, (i + 2 < frame_height ? i + 2 : i));
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if (field1 != NULL) {
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scanlines.tt1 = field1;
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scanlines.m1 = field1 + field_stride;
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scanlines.bb1 = field1 + field_stride * 2;
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field1 += field_stride;
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scanlines.t1 = LINE2 (field1, i - 1);
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scanlines.b1 = LINE2 (field1, i + 1);
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scanlines.tt2 = LINE2 (field2, (i - 2 >= 0) ? i - 2 : i);
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scanlines.m2 = LINE2 (field2, i);
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scanlines.bb2 = LINE2 (field2, (i + 2 < frame_height ? i + 2 : i));
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scanlines.t3 = LINE2 (field3, i - 1);
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scanlines.b3 = LINE2 (field3, i + 1);
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copy_scanline (self, LINE (dest, i), &scanlines);
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} else {
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/* interpolating */
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scanlines.t0 = LINE2 (field0, i - 1);
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scanlines.b0 = LINE2 (field0, i + 1);
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scanlines.tt1 = LINE2 (field1, (i - 2 >= 0) ? i - 2 : i);
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scanlines.m1 = LINE2 (field1, i);
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scanlines.bb1 = LINE2 (field1, (i + 2 < frame_height ? i + 2 : i));
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scanlines.t2 = LINE2 (field2, i - 1);
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scanlines.b2 = LINE2 (field2, i + 1);
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scanlines.tt3 = LINE2 (field3, (i - 2 >= 0) ? i - 2 : i);
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scanlines.m3 = LINE2 (field3, i);
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scanlines.bb3 = LINE2 (field3, (i + 2 < frame_height ? i + 2 : i));
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interpolate_scanline (self, LINE (dest, i), &scanlines);
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}
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if (field2 != NULL) {
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scanlines.t2 = field2;
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scanlines.b2 = field2 + field_stride;
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}
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if (field3 != NULL) {
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scanlines.tt3 = field3;
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scanlines.m3 = field3 + field_stride;
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scanlines.bb3 = field3 + field_stride * 2;
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field3 += field_stride;
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}
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/* set valid data for corner cases */
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if (line == 2) {
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scanlines.tt1 = scanlines.bb1;
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scanlines.tt3 = scanlines.bb3;
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} else if (line == field_height) {
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scanlines.bb1 = scanlines.tt1;
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scanlines.bb3 = scanlines.tt3;
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}
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interpolate_scanline (self, out, &scanlines);
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out += row_stride;
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memset (&scanlines, 0, sizeof (scanlines));
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scanlines.bottom_field = (cur_field_flags == PICTURE_INTERLACED_BOTTOM);
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/* copy a scanline */
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scanlines.tt0 = field0;
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scanlines.m0 = field0 + field_stride;
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scanlines.bb0 = field0 + field_stride * 2;
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field0 += field_stride;
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if (field1 != NULL) {
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scanlines.t1 = field1;
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scanlines.b1 = field1 + field_stride;
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}
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if (field2 != NULL) {
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scanlines.tt2 = field2;
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scanlines.m2 = field2 + field_stride;
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scanlines.bb2 = field2 + field_stride * 2;
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field2 += field_stride;
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}
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if (field3 != NULL) {
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scanlines.t3 = field3;
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scanlines.b3 = field3 + field_stride;
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}
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/* set valid data for corner cases */
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if (line == field_height) {
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scanlines.bb0 = scanlines.tt0;
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scanlines.b1 = scanlines.t1;
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scanlines.bb2 = scanlines.tt2;
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scanlines.b3 = scanlines.t3;
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}
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copy_scanline (self, out, &scanlines);
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out += row_stride;
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}
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if (cur_field_flags == PICTURE_INTERLACED_TOP) {
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/* double the last scanline of the top field */
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memcpy (out, field0, row_stride);
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}
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}
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@ -599,10 +499,10 @@ gst_deinterlace_simple_method_deinterlace_frame_planar (GstDeinterlaceMethod *
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GstDeinterlaceSimpleMethod *self = GST_DEINTERLACE_SIMPLE_METHOD (method);
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GstDeinterlaceMethodClass *dm_class = GST_DEINTERLACE_METHOD_GET_CLASS (self);
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guint8 *out;
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const guint8 *field0 = NULL, *field1 = NULL, *field2 = NULL, *field3 = NULL;
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const guint8 *field0, *field1, *field2, *field3;
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gint cur_field_idx = history_count - dm_class->fields_required;
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guint cur_field_flags = history[cur_field_idx].flags;
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gint i, row_stride, offset;
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gint i, offset;
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GstDeinterlaceSimpleMethodFunction copy_scanline;
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GstDeinterlaceSimpleMethodFunction interpolate_scanline;
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@ -614,7 +514,6 @@ gst_deinterlace_simple_method_deinterlace_frame_planar (GstDeinterlaceMethod *
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g_assert (self->copy_scanline_planar[2] != NULL);
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for (i = 0; i < 3; i++) {
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row_stride = self->parent.row_stride[i];
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offset = self->parent.offset[i];
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copy_scanline = self->copy_scanline_planar[i];
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interpolate_scanline = self->interpolate_scanline_planar[i];
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@ -622,27 +521,22 @@ gst_deinterlace_simple_method_deinterlace_frame_planar (GstDeinterlaceMethod *
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out = GST_BUFFER_DATA (outbuf) + offset;
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field0 = GST_BUFFER_DATA (history[cur_field_idx].buf) + offset;
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if (history[cur_field_idx].flags & PICTURE_INTERLACED_BOTTOM)
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field0 += row_stride;
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g_assert (dm_class->fields_required <= 4);
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field1 = NULL;
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if (dm_class->fields_required >= 2) {
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field1 = GST_BUFFER_DATA (history[cur_field_idx + 1].buf) + offset;
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if (history[cur_field_idx + 1].flags & PICTURE_INTERLACED_BOTTOM)
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field1 += row_stride;
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}
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field2 = NULL;
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if (dm_class->fields_required >= 3) {
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field2 = GST_BUFFER_DATA (history[cur_field_idx + 2].buf) + offset;
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if (history[cur_field_idx + 2].flags & PICTURE_INTERLACED_BOTTOM)
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field2 += row_stride;
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}
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field3 = NULL;
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if (dm_class->fields_required >= 4) {
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field3 = GST_BUFFER_DATA (history[cur_field_idx + 3].buf) + offset;
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if (history[cur_field_idx + 3].flags & PICTURE_INTERLACED_BOTTOM)
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field3 += row_stride;
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}
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gst_deinterlace_simple_method_deinterlace_frame_planar_plane (self, out,
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