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avfilter/vf_thumbnail: add slice threading support

This commit is contained in:
Paul B Mahol 2022-11-10 14:37:06 +01:00
parent 65f3bc9e7e
commit 05721c5df8
1 changed files with 58 additions and 21 deletions
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79
libavfilter/vf_thumbnail.c
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@ -46,6 +46,9 @@ typedef struct ThumbContext {
struct thumb_frame *frames; ///< the n_frames frames
AVRational tb; ///< copy of the input timebase to ease access
int nb_threads;
int *thread_histogram;
int planewidth[4];
int planeheight[4];
} ThumbContext;
@ -132,24 +135,24 @@ static AVFrame *get_best_frame(AVFilterContext *ctx)
return picref;
}
static int filter_frame(AVFilterLink *inlink, AVFrame *frame)
static int do_slice(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs)
{
int i, j;
AVFilterContext *ctx = inlink->dst;
ThumbContext *s = ctx->priv;
AVFilterLink *outlink = ctx->outputs[0];
int *hist = s->frames[s->n].histogram;
const uint8_t *p = frame->data[0];
ThumbContext *s = ctx->priv;
AVFrame *frame = arg;
int *hist = s->thread_histogram + HIST_SIZE * jobnr;
const int h = frame->height;
const int w = frame->width;
const int slice_start = (h * jobnr) / nb_jobs;
const int slice_end = (h * (jobnr+1)) / nb_jobs;
const uint8_t *p = frame->data[0] + slice_start * frame->linesize[0];
// keep a reference of each frame
s->frames[s->n].buf = frame;
memset(hist, 0, sizeof(*hist) * HIST_SIZE);
// update current frame histogram
switch (inlink->format) {
switch (frame->format) {
case AV_PIX_FMT_RGB24:
case AV_PIX_FMT_BGR24:
for (j = 0; j < inlink->h; j++) {
for (i = 0; i < inlink->w; i++) {
for (int j = slice_start; j < slice_end; j++) {
for (int i = 0; i < w; i++) {
hist[0*256 + p[i*3 ]]++;
hist[1*256 + p[i*3 + 1]]++;
hist[2*256 + p[i*3 + 2]]++;
@ -161,8 +164,8 @@ static int filter_frame(AVFilterLink *inlink, AVFrame *frame)
case AV_PIX_FMT_BGR0:
case AV_PIX_FMT_RGBA:
case AV_PIX_FMT_BGRA:
for (j = 0; j < inlink->h; j++) {
for (i = 0; i < inlink->w; i++) {
for (int j = slice_start; j < slice_end; j++) {
for (int i = 0; i < w; i++) {
hist[0*256 + p[i*4 ]]++;
hist[1*256 + p[i*4 + 1]]++;
hist[2*256 + p[i*4 + 2]]++;
@ -174,8 +177,8 @@ static int filter_frame(AVFilterLink *inlink, AVFrame *frame)
case AV_PIX_FMT_0BGR:
case AV_PIX_FMT_ARGB:
case AV_PIX_FMT_ABGR:
for (j = 0; j < inlink->h; j++) {
for (i = 0; i < inlink->w; i++) {
for (int j = slice_start; j < slice_end; j++) {
for (int i = 0; i < w; i++) {
hist[0*256 + p[i*4 + 1]]++;
hist[1*256 + p[i*4 + 2]]++;
hist[2*256 + p[i*4 + 3]]++;
@ -185,9 +188,12 @@ static int filter_frame(AVFilterLink *inlink, AVFrame *frame)
break;
default:
for (int plane = 0; plane < 3; plane++) {
const uint8_t *p = frame->data[plane];
for (j = 0; j < s->planeheight[plane]; j++) {
for (i = 0; i < s->planewidth[plane]; i++)
const int slice_start = (s->planeheight[plane] * jobnr) / nb_jobs;
const int slice_end = (s->planeheight[plane] * (jobnr+1)) / nb_jobs;
const uint8_t *p = frame->data[plane] + slice_start * frame->linesize[plane];
for (int j = slice_start; j < slice_end; j++) {
for (int i = 0; i < s->planewidth[plane]; i++)
hist[256*plane + p[i]]++;
p += frame->linesize[plane];
}
@ -195,6 +201,30 @@ static int filter_frame(AVFilterLink *inlink, AVFrame *frame)
break;
}
return 0;
}
static int filter_frame(AVFilterLink *inlink, AVFrame *frame)
{
AVFilterContext *ctx = inlink->dst;
ThumbContext *s = ctx->priv;
AVFilterLink *outlink = ctx->outputs[0];
int *hist = s->frames[s->n].histogram;
// keep a reference of each frame
s->frames[s->n].buf = frame;
ff_filter_execute(ctx, do_slice, frame, NULL,
FFMIN(frame->height, s->nb_threads));
// update current frame histogram
for (int j = 0; j < FFMIN(frame->height, s->nb_threads); j++) {
int *thread_histogram = s->thread_histogram + HIST_SIZE * j;
for (int i = 0; i < HIST_SIZE; i++)
hist[i] += thread_histogram[i];
}
// no selection until the buffer of N frames is filled up
s->n++;
if (s->n < s->n_frames)
@ -210,6 +240,7 @@ static av_cold void uninit(AVFilterContext *ctx)
for (i = 0; i < s->n_frames && s->frames && s->frames[i].buf; i++)
av_frame_free(&s->frames[i].buf);
av_freep(&s->frames);
av_freep(&s->thread_histogram);
}
static int request_frame(AVFilterLink *link)
@ -235,6 +266,11 @@ static int config_props(AVFilterLink *inlink)
ThumbContext *s = ctx->priv;
const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(inlink->format);
s->nb_threads = ff_filter_get_nb_threads(ctx);
s->thread_histogram = av_calloc(HIST_SIZE, s->nb_threads * sizeof(*s->thread_histogram));
if (!s->thread_histogram)
return AVERROR(ENOMEM);
s->tb = inlink->time_base;
s->planewidth[1] = s->planewidth[2] = AV_CEIL_RSHIFT(inlink->w, desc->log2_chroma_w);
s->planewidth[0] = s->planewidth[3] = inlink->w;
@ -288,5 +324,6 @@ const AVFilter ff_vf_thumbnail = {
FILTER_OUTPUTS(thumbnail_outputs),
FILTER_PIXFMTS_ARRAY(pix_fmts),
.priv_class = &thumbnail_class,
.flags = AVFILTER_FLAG_SUPPORT_TIMELINE_GENERIC,
.flags = AVFILTER_FLAG_SUPPORT_TIMELINE_GENERIC |
AVFILTER_FLAG_SLICE_THREADS,
};