lavfi/drawbox: refine code
Extract common code of filter_frame() and drawgrid_filter_frame() to draw_region(). Signed-off-by: Ting Fu <ting.fu@intel.com>
This commit is contained in:
Ting Fu
Guo Yejun
parent
4c705a2775
commit
9921ae8a5d
@ -85,6 +85,61 @@ typedef struct DrawBoxContext {
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static const int NUM_EXPR_EVALS = 5;
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typedef int (*PixelBelongsToRegion)(DrawBoxContext *s, int x, int y);
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#define ASSIGN_THREE_CHANNELS \
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row[0] = frame->data[0] + y * frame->linesize[0]; \
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row[1] = frame->data[1] + (y >> ctx->vsub) * frame->linesize[1]; \
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row[2] = frame->data[2] + (y >> ctx->vsub) * frame->linesize[2];
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#define ASSIGN_FOUR_CHANNELS \
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ASSIGN_THREE_CHANNELS \
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row[3] = frame->data[3] + y * frame->linesize[3];
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static void draw_region(AVFrame *frame, DrawBoxContext *ctx, int left, int top, int right, int down,
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PixelBelongsToRegion pixel_belongs_to_region)
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{
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unsigned char *row[4];
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int x, y;
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if (ctx->have_alpha && ctx->replace) {
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for (y = top; y < down; y++) {
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ASSIGN_FOUR_CHANNELS
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if (ctx->invert_color) {
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for (x = left; x < right; x++)
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if (pixel_belongs_to_region(ctx, x, y))
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row[0][x] = 0xff - row[0][x];
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} else {
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for (x = left; x < right; x++) {
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if (pixel_belongs_to_region(ctx, x, y)) {
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row[0][x ] = ctx->yuv_color[Y];
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row[1][x >> ctx->hsub] = ctx->yuv_color[U];
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row[2][x >> ctx->hsub] = ctx->yuv_color[V];
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row[3][x ] = ctx->yuv_color[A];
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}
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}
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}
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}
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} else {
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for (y = top; y < down; y++) {
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ASSIGN_THREE_CHANNELS
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if (ctx->invert_color) {
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if (pixel_belongs_to_region(ctx, x, y))
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row[0][x] = 0xff - row[0][x];
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} else {
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for (x = left; x < right; x++) {
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double alpha = (double)ctx->yuv_color[A] / 255;
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if (pixel_belongs_to_region(ctx, x, y)) {
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row[0][x ] = (1 - alpha) * row[0][x ] + alpha * ctx->yuv_color[Y];
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row[1][x >> ctx->hsub] = (1 - alpha) * row[1][x >> ctx->hsub] + alpha * ctx->yuv_color[U];
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row[2][x >> ctx->hsub] = (1 - alpha) * row[2][x >> ctx->hsub] + alpha * ctx->yuv_color[V];
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}
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}
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}
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}
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}
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}
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static av_cold int init(AVFilterContext *ctx)
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{
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DrawBoxContext *s = ctx->priv;
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@ -217,58 +272,9 @@ static av_pure av_always_inline int pixel_belongs_to_box(DrawBoxContext *s, int
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static int filter_frame(AVFilterLink *inlink, AVFrame *frame)
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{
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DrawBoxContext *s = inlink->dst->priv;
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int plane, x, y, xb = s->x, yb = s->y;
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unsigned char *row[4];
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if (s->have_alpha && s->replace) {
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for (y = FFMAX(yb, 0); y < frame->height && y < (yb + s->h); y++) {
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row[0] = frame->data[0] + y * frame->linesize[0];
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row[3] = frame->data[3] + y * frame->linesize[3];
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for (plane = 1; plane < 3; plane++)
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row[plane] = frame->data[plane] +
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frame->linesize[plane] * (y >> s->vsub);
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if (s->invert_color) {
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for (x = FFMAX(xb, 0); x < xb + s->w && x < frame->width; x++)
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if (pixel_belongs_to_box(s, x, y))
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row[0][x] = 0xff - row[0][x];
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} else {
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for (x = FFMAX(xb, 0); x < xb + s->w && x < frame->width; x++) {
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if (pixel_belongs_to_box(s, x, y)) {
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row[0][x ] = s->yuv_color[Y];
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row[1][x >> s->hsub] = s->yuv_color[U];
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row[2][x >> s->hsub] = s->yuv_color[V];
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row[3][x ] = s->yuv_color[A];
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}
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}
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}
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}
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} else {
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for (y = FFMAX(yb, 0); y < frame->height && y < (yb + s->h); y++) {
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row[0] = frame->data[0] + y * frame->linesize[0];
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for (plane = 1; plane < 3; plane++)
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row[plane] = frame->data[plane] +
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frame->linesize[plane] * (y >> s->vsub);
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if (s->invert_color) {
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for (x = FFMAX(xb, 0); x < xb + s->w && x < frame->width; x++)
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if (pixel_belongs_to_box(s, x, y))
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row[0][x] = 0xff - row[0][x];
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} else {
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for (x = FFMAX(xb, 0); x < xb + s->w && x < frame->width; x++) {
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double alpha = (double)s->yuv_color[A] / 255;
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if (pixel_belongs_to_box(s, x, y)) {
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row[0][x ] = (1 - alpha) * row[0][x ] + alpha * s->yuv_color[Y];
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row[1][x >> s->hsub] = (1 - alpha) * row[1][x >> s->hsub] + alpha * s->yuv_color[U];
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row[2][x >> s->hsub] = (1 - alpha) * row[2][x >> s->hsub] + alpha * s->yuv_color[V];
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}
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}
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}
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}
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}
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draw_region(frame, s, FFMAX(s->x, 0), FFMAX(s->y, 0), FFMIN(s->x + s->w, frame->width),
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FFMIN(s->y + s->h, frame->height), pixel_belongs_to_box);
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return ff_filter_frame(inlink->dst->outputs[0], frame);
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}
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@ -389,58 +395,8 @@ static av_pure av_always_inline int pixel_belongs_to_grid(DrawBoxContext *drawgr
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static int drawgrid_filter_frame(AVFilterLink *inlink, AVFrame *frame)
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{
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DrawBoxContext *drawgrid = inlink->dst->priv;
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int plane, x, y;
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uint8_t *row[4];
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if (drawgrid->have_alpha && drawgrid->replace) {
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for (y = 0; y < frame->height; y++) {
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row[0] = frame->data[0] + y * frame->linesize[0];
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row[3] = frame->data[3] + y * frame->linesize[3];
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for (plane = 1; plane < 3; plane++)
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row[plane] = frame->data[plane] +
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frame->linesize[plane] * (y >> drawgrid->vsub);
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if (drawgrid->invert_color) {
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for (x = 0; x < frame->width; x++)
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if (pixel_belongs_to_grid(drawgrid, x, y))
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row[0][x] = 0xff - row[0][x];
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} else {
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for (x = 0; x < frame->width; x++) {
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if (pixel_belongs_to_grid(drawgrid, x, y)) {
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row[0][x ] = drawgrid->yuv_color[Y];
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row[1][x >> drawgrid->hsub] = drawgrid->yuv_color[U];
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row[2][x >> drawgrid->hsub] = drawgrid->yuv_color[V];
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row[3][x ] = drawgrid->yuv_color[A];
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}
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}
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}
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}
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} else {
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for (y = 0; y < frame->height; y++) {
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row[0] = frame->data[0] + y * frame->linesize[0];
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for (plane = 1; plane < 3; plane++)
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row[plane] = frame->data[plane] +
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frame->linesize[plane] * (y >> drawgrid->vsub);
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if (drawgrid->invert_color) {
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for (x = 0; x < frame->width; x++)
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if (pixel_belongs_to_grid(drawgrid, x, y))
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row[0][x] = 0xff - row[0][x];
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} else {
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for (x = 0; x < frame->width; x++) {
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double alpha = (double)drawgrid->yuv_color[A] / 255;
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if (pixel_belongs_to_grid(drawgrid, x, y)) {
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row[0][x ] = (1 - alpha) * row[0][x ] + alpha * drawgrid->yuv_color[Y];
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row[1][x >> drawgrid->hsub] = (1 - alpha) * row[1][x >> drawgrid->hsub] + alpha * drawgrid->yuv_color[U];
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row[2][x >> drawgrid->hsub] = (1 - alpha) * row[2][x >> drawgrid->hsub] + alpha * drawgrid->yuv_color[V];
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}
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}
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}
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}
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}
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draw_region(frame, drawgrid, 0, 0, frame->width, frame->height, pixel_belongs_to_grid);
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return ff_filter_frame(inlink->dst->outputs[0], frame);
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}
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