typedef struct {
const AVClass *class;
int w, h;
- char *rate_str;
AVRational rate;
int buf_idx;
AVFrame *outpicref;
#define FLAGS AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM
static const AVOption showwaves_options[] = {
- { "rate", "set video rate", OFFSET(rate_str), AV_OPT_TYPE_STRING, {.str = NULL}, 0, 0, FLAGS },
- { "r", "set video rate", OFFSET(rate_str), AV_OPT_TYPE_STRING, {.str = NULL}, 0, 0, FLAGS },
+ { "rate", "set video rate", OFFSET(rate), AV_OPT_TYPE_VIDEO_RATE, {.str = "25"}, 0, 0, FLAGS },
+ { "r", "set video rate", OFFSET(rate), AV_OPT_TYPE_VIDEO_RATE, {.str = "25"}, 0, 0, FLAGS },
{ "size", "set video size", OFFSET(w), AV_OPT_TYPE_IMAGE_SIZE, {.str = "600x240"}, 0, 0, FLAGS },
{ "s", "set video size", OFFSET(w), AV_OPT_TYPE_IMAGE_SIZE, {.str = "600x240"}, 0, 0, FLAGS },
{ "n", "set how many samples to show in the same point", OFFSET(n), AV_OPT_TYPE_INT, {.i64 = 0}, 0, INT_MAX, FLAGS },
{
ShowWavesContext *showwaves = ctx->priv;
- av_freep(&showwaves->rate_str);
av_frame_free(&showwaves->outpicref);
}
AVFilterContext *ctx = outlink->src;
AVFilterLink *inlink = ctx->inputs[0];
ShowWavesContext *showwaves = ctx->priv;
- int err;
-
- if (showwaves->n && showwaves->rate_str) {
- av_log(ctx, AV_LOG_ERROR, "Options 'n' and 'rate' cannot be set at the same time\n");
- return AVERROR(EINVAL);
- }
- if (!showwaves->n) {
- if (!showwaves->rate_str)
- showwaves->rate = (AVRational){25,1}; /* set default value */
- else if ((err = av_parse_video_rate(&showwaves->rate, showwaves->rate_str)) < 0) {
- av_log(ctx, AV_LOG_ERROR, "Invalid frame rate: '%s'\n", showwaves->rate_str);
- return err;
- }
+ if (!showwaves->n)
showwaves->n = FFMAX(1, ((double)inlink->sample_rate / (showwaves->w * av_q2d(showwaves->rate))) + 0.5);
- }
outlink->w = showwaves->w;
outlink->h = showwaves->h;