From e35fb5add45ca27ab0568f3e0c2828246e8ff5c9 Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Cl=C3=A9ment=20B=C5=93sch?= Date: Thu, 26 Dec 2013 13:39:49 +0100 Subject: avfilter/showwaves: add split_channels option --- libavfilter/avf_showwaves.c | 14 ++++++++++---- 1 file changed, 10 insertions(+), 4 deletions(-) (limited to 'libavfilter/avf_showwaves.c') diff --git a/libavfilter/avf_showwaves.c b/libavfilter/avf_showwaves.c index 3ffc4a2..804badd 100644 --- a/libavfilter/avf_showwaves.c +++ b/libavfilter/avf_showwaves.c @@ -51,6 +51,7 @@ typedef struct { int n; int sample_count_mod; enum ShowWavesMode mode; + int split_channels; void (*draw_sample)(uint8_t *buf, int height, int linesize, int16_t sample, int16_t *prev_y, int intensity); } ShowWavesContext; @@ -69,6 +70,7 @@ static const AVOption showwaves_options[] = { { "n", "set how many samples to show in the same point", OFFSET(n), AV_OPT_TYPE_INT, {.i64 = 0}, 0, INT_MAX, 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 }, + { "split_channels", "draw channels separately", OFFSET(split_channels), AV_OPT_TYPE_INT, {.i64 = 0}, 0, 1, FLAGS }, { NULL } }; @@ -241,7 +243,8 @@ static int filter_frame(AVFilterLink *inlink, AVFrame *insamples) int nb_channels = inlink->channels; int i, j, ret = 0; const int n = showwaves->n; - const int x = 255 / (nb_channels * n); /* multiplication factor, pre-computed to avoid in-loop divisions */ + const int x = 255 / ((showwaves->split_channels ? 1 : nb_channels) * n); /* multiplication factor, pre-computed to avoid in-loop divisions */ + const int ch_height = showwaves->split_channels ? outlink->h / nb_channels : outlink->h; /* draw data in the buffer */ for (i = 0; i < nb_samples; i++) { @@ -260,10 +263,13 @@ static int filter_frame(AVFilterLink *inlink, AVFrame *insamples) for (j = 0; j < outlink->h; j++) memset(outpicref->data[0] + j * linesize, 0, outlink->w); } - for (j = 0; j < nb_channels; j++) - showwaves->draw_sample(outpicref->data[0] + showwaves->buf_idx, - outlink->h, linesize, *p++, + for (j = 0; j < nb_channels; j++) { + uint8_t *buf = outpicref->data[0] + showwaves->buf_idx; + if (showwaves->split_channels) + buf += j*ch_height*linesize; + showwaves->draw_sample(buf, ch_height, linesize, *p++, &showwaves->buf_idy[j], x); + } showwaves->sample_count_mod++; if (showwaves->sample_count_mod == n) { -- cgit v1.1