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lavfi/overlay: switch to filter_frame API

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This commit is contained in:
Stefano Sabatini 2012-12-08 15:15:20 +01:00
parent 98256622a6
commit 5e402a5319
1 changed files with 32 additions and 106 deletions
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138
libavfilter/vf_overlay.c
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@ -294,26 +294,24 @@ static int config_output(AVFilterLink *outlink)
// ((((x) + (y)) << 8) - ((x) + (y)) - (y) * (x)) is a faster version of: 255 * (x + y)
#define UNPREMULTIPLY_ALPHA(x, y) ((((x) << 16) - ((x) << 9) + (x)) / ((((x) + (y)) << 8) - ((x) + (y)) - (y) * (x)))
static void blend_slice(AVFilterContext *ctx,
/**
* Blend image in src to destination buffer dst at position (x, y).
*
* It is assumed that the src image at position (x, y) is contained in
* dst.
*/
static void blend_image(AVFilterContext *ctx,
AVFilterBufferRef *dst, AVFilterBufferRef *src,
int x, int y, int w, int h,
int slice_y, int slice_w, int slice_h)
int x, int y)
{
OverlayContext *over = ctx->priv;
int i, j, k;
int width, height;
int overlay_end_y = y+h;
int slice_end_y = slice_y+slice_h;
int end_y, start_y;
width = FFMIN(slice_w - x, w);
end_y = FFMIN(slice_end_y, overlay_end_y);
start_y = FFMAX(y, slice_y);
height = end_y - start_y;
int width = src->video->w;
int height = src->video->h;
if (over->main_is_packed_rgb) {
uint8_t *dp = dst->data[0] + x * over->main_pix_step[0] +
start_y * dst->linesize[0];
y * dst->linesize[0];
uint8_t *sp = src->data[0];
uint8_t alpha; ///< the amount of overlay to blend on to main
const int dr = over->main_rgba_map[R];
@ -327,8 +325,6 @@ static void blend_slice(AVFilterContext *ctx,
const int sa = over->overlay_rgba_map[A];
const int sstep = over->overlay_pix_step[0];
const int main_has_alpha = over->main_has_alpha;
if (slice_y > y)
sp += (slice_y - y) * src->linesize[0];
for (i = 0; i < height; i++) {
uint8_t *d = dp, *s = sp;
for (j = 0; j < width; j++) {
@ -378,11 +374,9 @@ static void blend_slice(AVFilterContext *ctx,
const int main_has_alpha = over->main_has_alpha;
if (main_has_alpha) {
uint8_t *da = dst->data[3] + x * over->main_pix_step[3] +
start_y * dst->linesize[3];
y * dst->linesize[3];
uint8_t *sa = src->data[3];
uint8_t alpha; ///< the amount of overlay to blend on to main
if (slice_y > y)
sa += (slice_y - y) * src->linesize[3];
for (i = 0; i < height; i++) {
uint8_t *d = da, *s = sa;
for (j = 0; j < width; j++) {
@ -412,15 +406,11 @@ static void blend_slice(AVFilterContext *ctx,
int hsub = i ? over->hsub : 0;
int vsub = i ? over->vsub : 0;
uint8_t *dp = dst->data[i] + (x >> hsub) +
(start_y >> vsub) * dst->linesize[i];
(y >> vsub) * dst->linesize[i];
uint8_t *sp = src->data[i];
uint8_t *ap = src->data[3];
int wp = FFALIGN(width, 1<<hsub) >> hsub;
int hp = FFALIGN(height, 1<<vsub) >> vsub;
if (slice_y > y) {
sp += ((slice_y - y) >> vsub) * src->linesize[i];
ap += (slice_y - y) * src->linesize[3];
}
for (j = 0; j < hp; j++) {
uint8_t *d = dp, *s = sp, *a = ap;
for (k = 0; k < wp; k++) {
@ -468,11 +458,11 @@ static void blend_slice(AVFilterContext *ctx,
}
}
static int try_start_frame(AVFilterContext *ctx, AVFilterBufferRef *mainpic)
static int try_filter_frame(AVFilterContext *ctx, AVFilterBufferRef *mainpic)
{
OverlayContext *over = ctx->priv;
AVFilterLink *outlink = ctx->outputs[0];
AVFilterBufferRef *next_overpic, *outpicref;
AVFilterBufferRef *next_overpic;
int ret;
/* Discard obsolete overlay frames: if there is a next overlay frame with pts
@ -496,21 +486,21 @@ static int try_start_frame(AVFilterContext *ctx, AVFilterBufferRef *mainpic)
/* At this point, we know that the current overlay frame extends to the
* time of the main frame. */
outlink->out_buf = outpicref = avfilter_ref_buffer(mainpic, ~0);
av_dlog(ctx, "main_pts:%s main_pts_time:%s",
av_ts2str(outpicref->pts), av_ts2timestr(outpicref->pts, &outlink->time_base));
av_ts2str(mainpic->pts), av_ts2timestr(mainpic->pts, &outlink->time_base));
if (over->overpicref)
av_dlog(ctx, " over_pts:%s over_pts_time:%s",
av_ts2str(over->overpicref->pts), av_ts2timestr(over->overpicref->pts, &outlink->time_base));
av_dlog(ctx, "\n");
ret = ff_start_frame(ctx->outputs[0], avfilter_ref_buffer(outpicref, ~0));
if (over->overpicref)
blend_image(ctx, mainpic, over->overpicref, over->x, over->y);
ret = ff_filter_frame(ctx->outputs[0], mainpic);
over->frame_requested = 0;
return ret;
}
static int try_start_next_frame(AVFilterContext *ctx)
static int try_filter_next_frame(AVFilterContext *ctx)
{
OverlayContext *over = ctx->priv;
AVFilterBufferRef *next_mainpic = ff_bufqueue_peek(&over->queue_main, 0);
@ -518,41 +508,21 @@ static int try_start_next_frame(AVFilterContext *ctx)
if (!next_mainpic)
return AVERROR(EAGAIN);
if ((ret = try_start_frame(ctx, next_mainpic)) == AVERROR(EAGAIN))
if ((ret = try_filter_frame(ctx, next_mainpic)) == AVERROR(EAGAIN))
return ret;
avfilter_unref_buffer(ff_bufqueue_get(&over->queue_main));
ff_bufqueue_get(&over->queue_main);
return ret;
}
static int try_push_frame(AVFilterContext *ctx)
{
OverlayContext *over = ctx->priv;
AVFilterLink *outlink = ctx->outputs[0];
AVFilterBufferRef *outpicref;
int ret;
if ((ret = try_start_next_frame(ctx)) < 0)
return ret;
outpicref = outlink->out_buf;
if (over->overpicref)
blend_slice(ctx, outpicref, over->overpicref, over->x, over->y,
over->overpicref->video->w, over->overpicref->video->h,
0, outpicref->video->w, outpicref->video->h);
if ((ret = ff_draw_slice(outlink, 0, outpicref->video->h, +1)) < 0 ||
(ret = ff_end_frame(outlink)) < 0)
return ret;
return 0;
}
static int flush_frames(AVFilterContext *ctx)
{
int ret;
while (!(ret = try_push_frame(ctx)));
while (!(ret = try_filter_next_frame(ctx)));
return ret == AVERROR(EAGAIN) ? 0 : ret;
}
static int start_frame_main(AVFilterLink *inlink, AVFilterBufferRef *inpicref)
static int filter_frame_main(AVFilterLink *inlink, AVFilterBufferRef *inpicref)
{
AVFilterContext *ctx = inlink->dst;
OverlayContext *over = ctx->priv;
@ -560,64 +530,29 @@ static int start_frame_main(AVFilterLink *inlink, AVFilterBufferRef *inpicref)
if ((ret = flush_frames(ctx)) < 0)
return ret;
if ((ret = try_start_frame(ctx, inpicref)) < 0) {
if ((ret = try_filter_frame(ctx, inpicref)) < 0) {
if (ret != AVERROR(EAGAIN))
return ret;
ff_bufqueue_add(ctx, &over->queue_main, inpicref);
av_assert1(inpicref == inlink->cur_buf);
inlink->cur_buf = NULL;
}
return 0;
}
static int draw_slice_main(AVFilterLink *inlink, int y, int h, int slice_dir)
{
AVFilterContext *ctx = inlink->dst;
OverlayContext *over = ctx->priv;
AVFilterLink *outlink = ctx->outputs[0];
AVFilterBufferRef *outpicref = outlink->out_buf;
if (!outpicref)
if (!over->overpicref)
return 0;
if (over->overpicref &&
y + h > over->y && y < over->y + over->overpicref->video->h) {
blend_slice(ctx, outpicref, over->overpicref, over->x, over->y,
over->overpicref->video->w, over->overpicref->video->h,
y, outpicref->video->w, h);
}
return ff_draw_slice(outlink, y, h, slice_dir);
}
static int end_frame_main(AVFilterLink *inlink)
{
AVFilterContext *ctx = inlink->dst;
AVFilterLink *outlink = ctx->outputs[0];
AVFilterBufferRef *outpicref = outlink->out_buf;
flush_frames(ctx);
if (!outpicref)
return 0;
return ff_end_frame(ctx->outputs[0]);
}
static int start_frame_over(AVFilterLink *inlink, AVFilterBufferRef *inpicref)
{
return 0;
}
static int end_frame_over(AVFilterLink *inlink)
static int filter_frame_over(AVFilterLink *inlink, AVFilterBufferRef *inpicref)
{
AVFilterContext *ctx = inlink->dst;
OverlayContext *over = ctx->priv;
AVFilterBufferRef *inpicref = inlink->cur_buf;
int ret;
inlink->cur_buf = NULL;
if ((ret = flush_frames(ctx)) < 0)
return ret;
ff_bufqueue_add(ctx, &over->queue_over, inpicref);
ret = try_push_frame(ctx);
ret = try_filter_next_frame(ctx);
return ret == AVERROR(EAGAIN) ? 0 : ret;
}
@ -627,7 +562,7 @@ static int request_frame(AVFilterLink *outlink)
OverlayContext *over = ctx->priv;
int input, ret;
if (!try_push_frame(ctx))
if (!try_filter_next_frame(ctx))
return 0;
over->frame_requested = 1;
while (over->frame_requested) {
@ -639,7 +574,7 @@ static int request_frame(AVFilterLink *outlink)
/* EOF on main is reported immediately */
if (ret == AVERROR_EOF && input == OVERLAY) {
over->overlay_eof = 1;
if ((ret = try_start_next_frame(ctx)) != AVERROR(EAGAIN))
if ((ret = try_filter_next_frame(ctx)) != AVERROR(EAGAIN))
return ret;
ret = 0; /* continue requesting frames on main */
}
@ -649,29 +584,20 @@ static int request_frame(AVFilterLink *outlink)
return 0;
}
static int null_draw_slice(AVFilterLink *inlink, int y, int h, int slice_dir)
{
return 0;
}
static const AVFilterPad avfilter_vf_overlay_inputs[] = {
{
.name = "main",
.type = AVMEDIA_TYPE_VIDEO,
.get_video_buffer = ff_null_get_video_buffer,
.config_props = config_input_main,
.start_frame = start_frame_main,
.draw_slice = draw_slice_main,
.end_frame = end_frame_main,
.filter_frame = filter_frame_main,
.min_perms = AV_PERM_READ | AV_PERM_WRITE | AV_PERM_PRESERVE,
},
{
.name = "overlay",
.type = AVMEDIA_TYPE_VIDEO,
.config_props = config_input_overlay,
.start_frame = start_frame_over,
.draw_slice = null_draw_slice,
.end_frame = end_frame_over,
.filter_frame = filter_frame_over,
.min_perms = AV_PERM_READ | AV_PERM_PRESERVE,
},
{ NULL }