From dc65d784df4071b772d6f6967fa79767d6ad4fae Mon Sep 17 00:00:00 2001 From: Clément Bœsch Date: Mon, 25 Mar 2013 01:19:17 +0100 Subject: lavfi/curves: add presets support. MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Except for the vintage preset, the values are defined by Lou Logan based on the ones found in Adobe Photoshop CS6. Signed-off-by: Clément Bœsch Signed-off-by: Lou Logan --- libavfilter/vf_curves.c | 73 +++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 73 insertions(+) (limited to 'libavfilter/vf_curves.c') diff --git a/libavfilter/vf_curves.c b/libavfilter/vf_curves.c index 7fee90a233..d83b7024f0 100644 --- a/libavfilter/vf_curves.c +++ b/libavfilter/vf_curves.c @@ -35,6 +35,7 @@ struct keypoint { typedef struct { const AVClass *class; + char *preset; char *comp_points_str[NB_COMP]; uint8_t graph[NB_COMP][256]; } CurvesContext; @@ -48,11 +49,56 @@ static const AVOption curves_options[] = { { "g", "set green points coordinates", OFFSET(comp_points_str[1]), AV_OPT_TYPE_STRING, {.str=NULL}, .flags = FLAGS }, { "blue", "set blue points coordinates", OFFSET(comp_points_str[2]), AV_OPT_TYPE_STRING, {.str=NULL}, .flags = FLAGS }, { "b", "set blue points coordinates", OFFSET(comp_points_str[2]), AV_OPT_TYPE_STRING, {.str=NULL}, .flags = FLAGS }, + { "preset", "select a color curves preset", OFFSET(preset), AV_OPT_TYPE_STRING, {.str=NULL}, .flags = FLAGS }, { NULL } }; AVFILTER_DEFINE_CLASS(curves); +static const struct { + const char *name; + const char *r; + const char *g; + const char *b; +} curves_presets[] = { { + "color_negative", + "0/1 0.129/1 0.466/0.498 0.725/0 1/0", + "0/1 0.109/1 0.301/0.498 0.517/0 1/0", + "0/1 0.098/1 0.235/0.498 0.423/0 1/0", + },{ + "cross_process", + "0.25/0.156 0.501/0.501 0.686/0.745", + "0.25/0.188 0.38/0.501 0.745/0.815 1/0.815", + "0.231/0.094 0.709/0.874", + },{ + "darker", "0.5/0.4", "0.5/0.4", "0.5/0.4", + },{ + "increase_contrast", + "0.149/0.066 0.831/0.905 0.905/0.98", + "0.149/0.066 0.831/0.905 0.905/0.98", + "0.149/0.066 0.831/0.905 0.905/0.98", + },{ + "lighter", "0.4/0.5", "0.4/0.5", "0.4/0.5", + },{ + "linear_contrast", + "0.305/0.286 0.694/0.713", + "0.305/0.286 0.694/0.713", + "0.305/0.286 0.694/0.713", + },{ + "medium_contrast", + "0.286/0.219 0.639/0.643", + "0.286/0.219 0.639/0.643", + "0.286/0.219 0.639/0.643", + },{ + "negative", "0/1 1/0", "0/1 1/0", "0/1 1/0", + },{ + "vintage", + "0/0.11 0.42/0.51 1/0.95", + "0.50/0.48", + "0/0.22 0.49/0.44 1/0.8", + } +}; + static struct keypoint *make_point(double x, double y, struct keypoint *next) { struct keypoint *point = av_mallocz(sizeof(*point)); @@ -247,6 +293,33 @@ static av_cold int init(AVFilterContext *ctx, const char *args) if ((ret = av_set_options_string(curves, args, "=", ":")) < 0) return ret; + if (curves->preset) { + char **pts = curves->comp_points_str; + if (pts[0] || pts[1] || pts[2]) { + av_log(ctx, AV_LOG_ERROR, "It is not possible to mix a preset " + "with explicit points placements\n"); + return AVERROR(EINVAL); + } + for (i = 0; i < FF_ARRAY_ELEMS(curves_presets); i++) { + if (!strcmp(curves->preset, curves_presets[i].name)) { + pts[0] = av_strdup(curves_presets[i].r); + pts[1] = av_strdup(curves_presets[i].g); + pts[2] = av_strdup(curves_presets[i].b); + if (!pts[0] || !pts[1] || !pts[2]) + return AVERROR(ENOMEM); + break; + } + } + if (i == FF_ARRAY_ELEMS(curves_presets)) { + av_log(ctx, AV_LOG_ERROR, "Preset '%s' not found. Available presets:", + curves->preset); + for (i = 0; i < FF_ARRAY_ELEMS(curves_presets); i++) + av_log(ctx, AV_LOG_ERROR, " %s", curves_presets[i].name); + av_log(ctx, AV_LOG_ERROR, ".\n"); + return AVERROR(EINVAL); + } + } + for (i = 0; i < NB_COMP; i++) { ret = parse_points_str(ctx, comp_points + i, curves->comp_points_str[i]); if (ret < 0) -- cgit v1.2.3