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avfilter: factorize requesting an input frame from multi output filters

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Signed-off-by: Marton Balint <cus@passwd.hu>
This commit is contained in:
Marton Balint
2025-06-22 12:07:26 +02:00
parent 01ffe103e5
commit f3b7aa6c22
6 changed files with 20 additions and 36 deletions
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1
doc/filter_design.txt
View File

@ -214,6 +214,7 @@ Frame scheduling
FF_FILTER_FORWARD_STATUS(inlink, outlink); FF_FILTER_FORWARD_STATUS(inlink, outlink);
FF_FILTER_FORWARD_STATUS_ALL(inlink, filter); FF_FILTER_FORWARD_STATUS_ALL(inlink, filter);
FF_FILTER_FORWARD_WANTED(outlink, inlink); FF_FILTER_FORWARD_WANTED(outlink, inlink);
FF_FILTER_FORWARD_WANTED_ANY(filter, inlink);
filter_frame filter_frame
------------ ------------

10
libavfilter/af_acrossover.c
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@ -588,15 +588,7 @@ static int activate(AVFilterContext *ctx)
return 0; return 0;
} }
for (int i = 0; i < ctx->nb_outputs; i++) { FF_FILTER_FORWARD_WANTED_ANY(ctx, inlink);
if (ff_outlink_get_status(ctx->outputs[i]))
continue;
if (ff_outlink_frame_wanted(ctx->outputs[i])) {
ff_inlink_request_frame(inlink);
return 0;
}
}
return FFERROR_NOT_READY; return FFERROR_NOT_READY;
} }

10
libavfilter/af_channelsplit.c
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@ -228,15 +228,7 @@ static int activate(AVFilterContext *ctx)
return 0; return 0;
} }
for (int i = 0; i < ctx->nb_outputs; i++) { FF_FILTER_FORWARD_WANTED_ANY(ctx, inlink);
if (ff_outlink_get_status(ctx->outputs[i]))
continue;
if (ff_outlink_frame_wanted(ctx->outputs[i])) {
ff_inlink_request_frame(inlink);
return 0;
}
}
return FFERROR_NOT_READY; return FFERROR_NOT_READY;
} }

15
libavfilter/filters.h
View File

@ -696,6 +696,21 @@ static inline void ff_outlink_set_status(AVFilterLink *link, int status, int64_t
} \ } \
} while (0) } while (0)
/**
* Forward the frame_wanted_out flag from any of the output links to an input link.
* If the flag is set on any of the outputs, this macro will return immediately.
*/
#define FF_FILTER_FORWARD_WANTED_ANY(filter, inlink) do { \
for (int i = 0; i < filter->nb_outputs; i++) { \
if (ff_outlink_get_status(filter->outputs[i])) \
continue; \
if (ff_outlink_frame_wanted(filter->outputs[i])) { \
ff_inlink_request_frame(inlink); \
return 0; \
} \
} \
} while (0)
/** /**
* Check for flow control between input and output. * Check for flow control between input and output.
* This is necessary for filters that may produce several output frames for * This is necessary for filters that may produce several output frames for

10
libavfilter/split.c
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@ -110,15 +110,7 @@ static int activate(AVFilterContext *ctx)
return 0; return 0;
} }
for (int i = 0; i < ctx->nb_outputs; i++) { FF_FILTER_FORWARD_WANTED_ANY(ctx, inlink);
if (ff_outlink_get_status(ctx->outputs[i]))
continue;
if (ff_outlink_frame_wanted(ctx->outputs[i])) {
ff_inlink_request_frame(inlink);
return 0;
}
}
return FFERROR_NOT_READY; return FFERROR_NOT_READY;
} }

10
libavfilter/vf_extractplanes.c
View File

@ -367,15 +367,7 @@ static int activate(AVFilterContext *ctx)
return 0; return 0;
} }
for (int i = 0; i < ctx->nb_outputs; i++) { FF_FILTER_FORWARD_WANTED_ANY(ctx, inlink);
if (ff_outlink_get_status(ctx->outputs[i]))
continue;
if (ff_outlink_frame_wanted(ctx->outputs[i])) {
ff_inlink_request_frame(inlink);
return 0;
}
}
return FFERROR_NOT_READY; return FFERROR_NOT_READY;
} }