* scale video filter
*/
+#include <stdio.h>
+#include <string.h>
+
#include "avfilter.h"
+#include "formats.h"
+#include "internal.h"
+#include "video.h"
#include "libavutil/avstring.h"
#include "libavutil/eval.h"
+#include "libavutil/internal.h"
#include "libavutil/mathematics.h"
+#include "libavutil/opt.h"
#include "libavutil/pixdesc.h"
#include "libswscale/swscale.h"
char h_expr[256]; ///< height expression string
} ScaleContext;
-static av_cold int init(AVFilterContext *ctx, const char *args, void *opaque)
+static av_cold int init(AVFilterContext *ctx, const char *args)
{
ScaleContext *scale = ctx->priv;
const char *p;
if (args) {
sscanf(args, "%255[^:]:%255[^:]", scale->w_expr, scale->h_expr);
p = strstr(args,"flags=");
- if (p) scale->flags = strtoul(p+6, NULL, 0);
+ if (p) {
+ const AVClass *class = sws_get_class();
+ const AVOption *o = av_opt_find(&class, "sws_flags", NULL, 0,
+ AV_OPT_SEARCH_FAKE_OBJ);
+ int ret = av_opt_eval_flags(&class, o, p + 6, &scale->flags);
+
+ if (ret < 0)
+ return ret;
+ }
}
return 0;
static int query_formats(AVFilterContext *ctx)
{
AVFilterFormats *formats;
- enum PixelFormat pix_fmt;
+ enum AVPixelFormat pix_fmt;
int ret;
if (ctx->inputs[0]) {
formats = NULL;
- for (pix_fmt = 0; pix_fmt < PIX_FMT_NB; pix_fmt++)
+ for (pix_fmt = 0; pix_fmt < AV_PIX_FMT_NB; pix_fmt++)
if ( sws_isSupportedInput(pix_fmt)
- && (ret = avfilter_add_format(&formats, pix_fmt)) < 0) {
- avfilter_formats_unref(&formats);
+ && (ret = ff_add_format(&formats, pix_fmt)) < 0) {
+ ff_formats_unref(&formats);
return ret;
}
- avfilter_formats_ref(formats, &ctx->inputs[0]->out_formats);
+ ff_formats_ref(formats, &ctx->inputs[0]->out_formats);
}
if (ctx->outputs[0]) {
formats = NULL;
- for (pix_fmt = 0; pix_fmt < PIX_FMT_NB; pix_fmt++)
+ for (pix_fmt = 0; pix_fmt < AV_PIX_FMT_NB; pix_fmt++)
if ( sws_isSupportedOutput(pix_fmt)
- && (ret = avfilter_add_format(&formats, pix_fmt)) < 0) {
- avfilter_formats_unref(&formats);
+ && (ret = ff_add_format(&formats, pix_fmt)) < 0) {
+ ff_formats_unref(&formats);
return ret;
}
- avfilter_formats_ref(formats, &ctx->outputs[0]->in_formats);
+ ff_formats_ref(formats, &ctx->outputs[0]->in_formats);
}
return 0;
AVFilterContext *ctx = outlink->src;
AVFilterLink *inlink = outlink->src->inputs[0];
ScaleContext *scale = ctx->priv;
+ const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(inlink->format);
int64_t w, h;
double var_values[VARS_NB], res;
char *expr;
var_values[VAR_IN_H] = var_values[VAR_IH] = inlink->h;
var_values[VAR_OUT_W] = var_values[VAR_OW] = NAN;
var_values[VAR_OUT_H] = var_values[VAR_OH] = NAN;
- var_values[VAR_DAR] = var_values[VAR_A] = (float) inlink->w / inlink->h;
+ var_values[VAR_DAR] = var_values[VAR_A] = (double) inlink->w / inlink->h;
var_values[VAR_SAR] = inlink->sample_aspect_ratio.num ?
- (float) inlink->sample_aspect_ratio.num / inlink->sample_aspect_ratio.den : 1;
- var_values[VAR_HSUB] = 1<<av_pix_fmt_descriptors[inlink->format].log2_chroma_w;
- var_values[VAR_VSUB] = 1<<av_pix_fmt_descriptors[inlink->format].log2_chroma_h;
+ (double) inlink->sample_aspect_ratio.num / inlink->sample_aspect_ratio.den : 1;
+ var_values[VAR_HSUB] = 1 << desc->log2_chroma_w;
+ var_values[VAR_VSUB] = 1 << desc->log2_chroma_h;
/* evaluate width and height */
av_expr_parse_and_eval(&res, (expr = scale->w_expr),
outlink->h = h;
/* TODO: make algorithm configurable */
- av_log(ctx, AV_LOG_INFO, "w:%d h:%d fmt:%s -> w:%d h:%d fmt:%s flags:0x%0x\n",
- inlink ->w, inlink ->h, av_pix_fmt_descriptors[ inlink->format].name,
- outlink->w, outlink->h, av_pix_fmt_descriptors[outlink->format].name,
+ av_log(ctx, AV_LOG_VERBOSE, "w:%d h:%d fmt:%s -> w:%d h:%d fmt:%s flags:0x%0x\n",
+ inlink ->w, inlink ->h, av_get_pix_fmt_name(inlink->format),
+ outlink->w, outlink->h, av_get_pix_fmt_name(outlink->format),
scale->flags);
- scale->input_is_pal = av_pix_fmt_descriptors[inlink->format].flags & PIX_FMT_PAL ||
- av_pix_fmt_descriptors[inlink->format].flags & PIX_FMT_PSEUDOPAL;
+ scale->input_is_pal = desc->flags & PIX_FMT_PAL ||
+ desc->flags & PIX_FMT_PSEUDOPAL;
if (scale->sws)
sws_freeContext(scale->sws);
return ret;
}
-static void start_frame(AVFilterLink *link, AVFilterBufferRef *picref)
+static int filter_frame(AVFilterLink *link, AVFrame *in)
{
ScaleContext *scale = link->dst->priv;
AVFilterLink *outlink = link->dst->outputs[0];
- AVFilterBufferRef *outpicref;
+ AVFrame *out;
+ const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(link->format);
- if (!scale->sws) {
- avfilter_start_frame(outlink, avfilter_ref_buffer(picref, ~0));
- return;
- }
+ if (!scale->sws)
+ return ff_filter_frame(outlink, in);
- scale->hsub = av_pix_fmt_descriptors[link->format].log2_chroma_w;
- scale->vsub = av_pix_fmt_descriptors[link->format].log2_chroma_h;
+ scale->hsub = desc->log2_chroma_w;
+ scale->vsub = desc->log2_chroma_h;
- outpicref = avfilter_get_video_buffer(outlink, AV_PERM_WRITE, outlink->w, outlink->h);
- avfilter_copy_buffer_ref_props(outpicref, picref);
- outpicref->video->w = outlink->w;
- outpicref->video->h = outlink->h;
+ out = ff_get_video_buffer(outlink, outlink->w, outlink->h);
+ if (!out) {
+ av_frame_free(&in);
+ return AVERROR(ENOMEM);
+ }
- outlink->out_buf = outpicref;
+ av_frame_copy_props(out, in);
+ out->width = outlink->w;
+ out->height = outlink->h;
- av_reduce(&outpicref->video->pixel_aspect.num, &outpicref->video->pixel_aspect.den,
- (int64_t)picref->video->pixel_aspect.num * outlink->h * link->w,
- (int64_t)picref->video->pixel_aspect.den * outlink->w * link->h,
+ av_reduce(&out->sample_aspect_ratio.num, &out->sample_aspect_ratio.den,
+ (int64_t)in->sample_aspect_ratio.num * outlink->h * link->w,
+ (int64_t)in->sample_aspect_ratio.den * outlink->w * link->h,
INT_MAX);
- scale->slice_y = 0;
- avfilter_start_frame(outlink, avfilter_ref_buffer(outpicref, ~0));
-}
+ sws_scale(scale->sws, in->data, in->linesize, 0, in->height,
+ out->data, out->linesize);
-static void draw_slice(AVFilterLink *link, int y, int h, int slice_dir)
-{
- ScaleContext *scale = link->dst->priv;
- int out_h;
- AVFilterBufferRef *cur_pic = link->cur_buf;
- const uint8_t *data[4];
+ av_frame_free(&in);
+ return ff_filter_frame(outlink, out);
+}
- if (!scale->sws) {
- avfilter_draw_slice(link->dst->outputs[0], y, h, slice_dir);
- return;
- }
+static const AVFilterPad avfilter_vf_scale_inputs[] = {
+ {
+ .name = "default",
+ .type = AVMEDIA_TYPE_VIDEO,
+ .filter_frame = filter_frame,
+ },
+ { NULL }
+};
- if (scale->slice_y == 0 && slice_dir == -1)
- scale->slice_y = link->dst->outputs[0]->h;
-
- data[0] = cur_pic->data[0] + y * cur_pic->linesize[0];
- data[1] = scale->input_is_pal ?
- cur_pic->data[1] :
- cur_pic->data[1] + (y>>scale->vsub) * cur_pic->linesize[1];
- data[2] = cur_pic->data[2] + (y>>scale->vsub) * cur_pic->linesize[2];
- data[3] = cur_pic->data[3] + y * cur_pic->linesize[3];
-
- out_h = sws_scale(scale->sws, data, cur_pic->linesize, y, h,
- link->dst->outputs[0]->out_buf->data,
- link->dst->outputs[0]->out_buf->linesize);
-
- if (slice_dir == -1)
- scale->slice_y -= out_h;
- avfilter_draw_slice(link->dst->outputs[0], scale->slice_y, out_h, slice_dir);
- if (slice_dir == 1)
- scale->slice_y += out_h;
-}
+static const AVFilterPad avfilter_vf_scale_outputs[] = {
+ {
+ .name = "default",
+ .type = AVMEDIA_TYPE_VIDEO,
+ .config_props = config_props,
+ },
+ { NULL }
+};
AVFilter avfilter_vf_scale = {
.name = "scale",
.priv_size = sizeof(ScaleContext),
- .inputs = (AVFilterPad[]) {{ .name = "default",
- .type = AVMEDIA_TYPE_VIDEO,
- .start_frame = start_frame,
- .draw_slice = draw_slice,
- .min_perms = AV_PERM_READ, },
- { .name = NULL}},
- .outputs = (AVFilterPad[]) {{ .name = "default",
- .type = AVMEDIA_TYPE_VIDEO,
- .config_props = config_props, },
- { .name = NULL}},
+ .inputs = avfilter_vf_scale_inputs,
+ .outputs = avfilter_vf_scale_outputs,
};
projects / ffmpeg / blobdiff