return ff_set_common_formats(ctx, ff_draw_supported_pixel_formats(0));
}
+enum EvalMode {
+ EVAL_MODE_INIT,
+ EVAL_MODE_FRAME,
+ EVAL_MODE_NB
+};
+
typedef struct PadContext {
const AVClass *class;
int w, h; ///< output dimensions, a value of 0 will result in the input size
int x, y; ///< offsets of the input area with respect to the padded area
int in_w, in_h; ///< width and height for the padded input video, which has to be aligned to the chroma values in order to avoid chroma issues
+ int inlink_w, inlink_h;
char *w_expr; ///< width expression string
char *h_expr; ///< height expression string
uint8_t rgba_color[4]; ///< color for the padding area
FFDrawContext draw;
FFDrawColor color;
+
+ int eval_mode; ///< expression evaluation mode
} PadContext;
static int config_input(AVFilterLink *inlink)
s->y = ff_draw_round_to_sub(&s->draw, 1, -1, s->y);
s->in_w = ff_draw_round_to_sub(&s->draw, 0, -1, inlink->w);
s->in_h = ff_draw_round_to_sub(&s->draw, 1, -1, inlink->h);
+ s->inlink_w = inlink->w;
+ s->inlink_h = inlink->h;
av_log(ctx, AV_LOG_VERBOSE, "w:%d h:%d -> w:%d h:%d x:%d y:%d color:0x%02X%02X%02X%02X\n",
inlink->w, inlink->h, s->w, s->h, s->x, s->y,
static int filter_frame(AVFilterLink *inlink, AVFrame *in)
{
PadContext *s = inlink->dst->priv;
+ AVFilterLink *outlink = inlink->dst->outputs[0];
AVFrame *out;
- int needs_copy = frame_needs_copy(s, in);
+ int needs_copy;
+ if(s->eval_mode == EVAL_MODE_FRAME && (
+ in->width != s->inlink_w
+ || in->height != s->inlink_h
+ || in->format != outlink->format
+ || in->sample_aspect_ratio.den != outlink->sample_aspect_ratio.den || in->sample_aspect_ratio.num != outlink->sample_aspect_ratio.num)) {
+ int ret;
+
+ inlink->dst->inputs[0]->format = in->format;
+ inlink->dst->inputs[0]->w = in->width;
+ inlink->dst->inputs[0]->h = in->height;
+
+ inlink->dst->inputs[0]->sample_aspect_ratio.den = in->sample_aspect_ratio.den;
+ inlink->dst->inputs[0]->sample_aspect_ratio.num = in->sample_aspect_ratio.num;
+
+
+ if ((ret = config_input(inlink)) < 0) {
+ s->inlink_w = -1;
+ return ret;
+ }
+ if ((ret = config_output(outlink)) < 0) {
+ s->inlink_w = -1;
+ return ret;
+ }
+ }
+
+ needs_copy = frame_needs_copy(s, in);
if (needs_copy) {
av_log(inlink->dst, AV_LOG_DEBUG, "Direct padding impossible allocating new frame\n");
{ "x", "set the x offset expression for the input image position", OFFSET(x_expr), AV_OPT_TYPE_STRING, {.str = "0"}, CHAR_MIN, CHAR_MAX, FLAGS },
{ "y", "set the y offset expression for the input image position", OFFSET(y_expr), AV_OPT_TYPE_STRING, {.str = "0"}, CHAR_MIN, CHAR_MAX, FLAGS },
{ "color", "set the color of the padded area border", OFFSET(rgba_color), AV_OPT_TYPE_COLOR, {.str = "black"}, .flags = FLAGS },
+ { "eval", "specify when to evaluate expressions", OFFSET(eval_mode), AV_OPT_TYPE_INT, {.i64 = EVAL_MODE_INIT}, 0, EVAL_MODE_NB-1, FLAGS, "eval" },
+ { "init", "eval expressions once during initialization", 0, AV_OPT_TYPE_CONST, {.i64=EVAL_MODE_INIT}, .flags = FLAGS, .unit = "eval" },
+ { "frame", "eval expressions during initialization and per-frame", 0, AV_OPT_TYPE_CONST, {.i64=EVAL_MODE_FRAME}, .flags = FLAGS, .unit = "eval" },
{ NULL }
};