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avfilter/af_stereotools: add support for commands

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This commit is contained in:
Paul B Mahol 2020-12-04 15:37:43 +01:00
parent eebf19ccd8
commit 51f8848e36
2 changed files with 21 additions and 7 deletions
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4
doc/filters.texi
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@ -5554,6 +5554,10 @@ Equal power distribution, from -6dB to +6dB range.
@end table
@end table
@subsection Commands
This filter supports the all above options as @ref{commands}.
@subsection Examples
@itemize

24
libavfilter/af_stereotools.c
View File

@ -57,7 +57,7 @@ typedef struct StereoToolsContext {
} StereoToolsContext;
#define OFFSET(x) offsetof(StereoToolsContext, x)
#define A AV_OPT_FLAG_AUDIO_PARAM|AV_OPT_FLAG_FILTERING_PARAM
#define A AV_OPT_FLAG_AUDIO_PARAM|AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_RUNTIME_PARAM
static const AVOption stereotools_options[] = {
{ "level_in", "set level in", OFFSET(level_in), AV_OPT_TYPE_DOUBLE, {.dbl=1}, 0.015625, 64, A },
@ -120,12 +120,9 @@ static int config_input(AVFilterLink *inlink)
AVFilterContext *ctx = inlink->dst;
StereoToolsContext *s = ctx->priv;
s->length = 2 * inlink->sample_rate * 0.05;
if (s->length <= 1 || s->length & 1) {
av_log(ctx, AV_LOG_ERROR, "sample rate is too small\n");
return AVERROR(EINVAL);
}
s->buffer = av_calloc(s->length, sizeof(*s->buffer));
s->length = FFALIGN(inlink->sample_rate / 10, 2);
if (!s->buffer)
s->buffer = av_calloc(s->length, sizeof(*s->buffer));
if (!s->buffer)
return AVERROR(ENOMEM);
@ -341,6 +338,18 @@ static int filter_frame(AVFilterLink *inlink, AVFrame *in)
return ff_filter_frame(outlink, out);
}
static int process_command(AVFilterContext *ctx, const char *cmd, const char *args,
char *res, int res_len, int flags)
{
int ret;
ret = ff_filter_process_command(ctx, cmd, args, res, res_len, flags);
if (ret < 0)
return ret;
return config_input(ctx->inputs[0]);
}
static av_cold void uninit(AVFilterContext *ctx)
{
StereoToolsContext *s = ctx->priv;
@ -375,5 +384,6 @@ AVFilter ff_af_stereotools = {
.uninit = uninit,
.inputs = inputs,
.outputs = outputs,
.process_command = process_command,
.flags = AVFILTER_FLAG_SUPPORT_TIMELINE_INTERNAL,
};