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lavfi/vf_libplacebo: add in_idx variable

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To allow placing an input dynamically, as a function of the input index.
This commit is contained in:
Niklas Haas 2023-06-15 16:24:20 +02:00
parent 7645c8df66
commit 5989719e87
2 changed files with 9 additions and 2 deletions
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2
doc/filters.texi
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@ -16320,6 +16320,8 @@ the @option{crop_w}, @option{crop_h}, @option{crop_x}, @option{crop_y},
also contain the following constants:
@table @option
@item in_idx, idx
The (0-based) numeric index of the currently active input stream.
@item crop_w, cw
@item crop_h, ch
The computed values of @option{crop_w} and @option{crop_h}.

9
libavfilter/vf_libplacebo.c
View File

@ -70,6 +70,7 @@ enum {
};
static const char *const var_names[] = {
"in_idx", "idx",///< index of input
"in_w", "iw", ///< width of the input video frame
"in_h", "ih", ///< height of the input video frame
"out_w", "ow", ///< width of the output video frame
@ -92,6 +93,7 @@ static const char *const var_names[] = {
};
enum var_name {
VAR_IN_IDX, VAR_IDX,
VAR_IN_W, VAR_IW,
VAR_IN_H, VAR_IH,
VAR_OUT_W, VAR_OW,
@ -115,6 +117,7 @@ enum var_name {
/* per-input dynamic filter state */
typedef struct LibplaceboInput {
int idx;
pl_renderer renderer;
pl_queue queue;
enum pl_queue_status qstatus;
@ -574,7 +577,7 @@ static void unlock_queue(void *priv, uint32_t qf, uint32_t qidx)
#endif
static int input_init(AVFilterContext *avctx, AVFilterLink *link,
LibplaceboInput *input)
LibplaceboInput *input, int idx)
{
LibplaceboContext *s = avctx->priv;
@ -584,6 +587,7 @@ static int input_init(AVFilterContext *avctx, AVFilterLink *link,
input->queue = pl_queue_create(s->gpu);
input->renderer = pl_renderer_create(s->log, s->gpu);
input->link = link;
input->idx = idx;
return 0;
}
@ -668,7 +672,7 @@ static int init_vulkan(AVFilterContext *avctx, const AVVulkanDeviceContext *hwct
if (!s->inputs)
return AVERROR(ENOMEM);
for (int i = 0; i < s->nb_inputs; i++)
RET(input_init(avctx, avctx->inputs[i], &s->inputs[i]));
RET(input_init(avctx, avctx->inputs[i], &s->inputs[i], i));
/* fall through */
fail:
@ -741,6 +745,7 @@ static void update_crops(AVFilterContext *ctx, LibplaceboInput *in,
double image_pts = src->pts * av_q2d(in->link->time_base);
/* Update dynamic variables */
s->var_values[VAR_IN_IDX] = s->var_values[VAR_IDX] = in->idx;
s->var_values[VAR_IN_W] = s->var_values[VAR_IW] = in->link->w;
s->var_values[VAR_IN_H] = s->var_values[VAR_IH] = in->link->h;
s->var_values[VAR_A] = (double) in->link->w / in->link->h;