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Code Issues Releases Activity

avfilter/vf_blackdetect_vulkan: fix black region reporting

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The old logic failed to take into account files that ended on ablack
region. The new logic matches the vf_blackdetect behavior.
This commit is contained in:
Niklas Haas
2025-06-02 13:52:27 +02:00
parent 167e343bbe
commit 6ad95be306
1 changed files with 22 additions and 8 deletions
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30
libavfilter/vf_blackdetect_vulkan.c
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@ -42,7 +42,6 @@ typedef struct BlackDetectVulkanContext {
int alpha;
int64_t black_start;
int64_t black_end;
} BlackDetectVulkanContext;
typedef struct BlackDetectPushData {
@ -145,6 +144,7 @@ static av_cold int init_filter(AVFilterContext *ctx)
RET(ff_vk_shader_register_exec(vkctx, &s->e, &s->shd));
s->black_start = AV_NOPTS_VALUE;
s->initialized = 1;
fail:
@ -156,6 +156,22 @@ fail:
return err;
}
static void report_black_region(AVFilterContext *ctx, int64_t black_end)
{
BlackDetectVulkanContext *s = ctx->priv;
const AVFilterLink *inlink = ctx->inputs[0];
if (s->black_start == AV_NOPTS_VALUE)
return;
if ((black_end - s->black_start) >= s->black_min_duration_time / av_q2d(inlink->time_base)) {
av_log(s, AV_LOG_INFO,
"black_start:%s black_end:%s black_duration:%s\n",
av_ts2timestr(s->black_start, &inlink->time_base),
av_ts2timestr(black_end, &inlink->time_base),
av_ts2timestr(black_end - s->black_start, &inlink->time_base));
}
}
static void evaluate(AVFilterLink *link, AVFrame *in,
const BlackDetectBuf *sum)
{
@ -183,15 +199,9 @@ static void evaluate(AVFilterLink *link, AVFrame *in,
av_ts2timestr(in->pts, &in->time_base), 0);
}
} else if (s->black_start != AV_NOPTS_VALUE) {
report_black_region(ctx, in->pts);
av_dict_set(&in->metadata, "lavfi.black_end",
av_ts2timestr(in->pts, &in->time_base), 0);
if ((in->pts - s->black_start) >= s->black_min_duration_time / av_q2d(in->time_base)) {
av_log(s, AV_LOG_INFO,
"black_start:%s black_end:%s black_duration:%s\n",
av_ts2timestr(s->black_start, &in->time_base),
av_ts2timestr(in->pts, &in->time_base),
av_ts2timestr(in->pts - s->black_start, &in->time_base));
}
s->black_start = AV_NOPTS_VALUE;
}
}
@ -349,8 +359,12 @@ fail:
static void blackdetect_vulkan_uninit(AVFilterContext *avctx)
{
BlackDetectVulkanContext *s = avctx->priv;
AVFilterLink *inlink = avctx->inputs[0];
FilterLink *inl = ff_filter_link(inlink);
FFVulkanContext *vkctx = &s->vkctx;
report_black_region(avctx, inl->current_pts);
ff_vk_exec_pool_free(vkctx, &s->e);
ff_vk_shader_free(vkctx, &s->shd);