/*
* Copyright (c) 2007 Bobby Bingham
*
- * This file is part of Libav.
+ * This file is part of FFmpeg.
*
- * Libav is free software; you can redistribute it and/or
+ * FFmpeg is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
- * Libav is distributed in the hope that it will be useful,
+ * FFmpeg is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
- * License along with Libav; if not, write to the Free Software
+ * License along with FFmpeg; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include "libavutil/avstring.h"
#include "libavutil/eval.h"
#include "libavutil/mathematics.h"
+#include "libavutil/opt.h"
#include "libavutil/pixdesc.h"
+#include "libavutil/imgutils.h"
+#include "libavutil/avassert.h"
#include "libswscale/swscale.h"
static const char *const var_names[] = {
- "PI",
- "PHI",
- "E",
"in_w", "iw",
"in_h", "ih",
"out_w", "ow",
"out_h", "oh",
- "a", "dar",
+ "a",
"sar",
+ "dar",
"hsub",
"vsub",
NULL
};
enum var_name {
- VAR_PI,
- VAR_PHI,
- VAR_E,
VAR_IN_W, VAR_IW,
VAR_IN_H, VAR_IH,
VAR_OUT_W, VAR_OW,
VAR_OUT_H, VAR_OH,
- VAR_A, VAR_DAR,
+ VAR_A,
VAR_SAR,
+ VAR_DAR,
VAR_HSUB,
VAR_VSUB,
VARS_NB
typedef struct {
struct SwsContext *sws; ///< software scaler context
+ struct SwsContext *isws[2]; ///< software scaler context for interlaced material
/**
* New dimensions. Special values are:
int hsub, vsub; ///< chroma subsampling
int slice_y; ///< top of current output slice
int input_is_pal; ///< set to 1 if the input format is paletted
+ int output_is_pal; ///< set to 1 if the output format is paletted
+ int interlaced;
char w_expr[256]; ///< width expression string
char h_expr[256]; ///< height expression string
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;
+ }
+ if(strstr(args,"interl=1")){
+ scale->interlaced=1;
+ }else if(strstr(args,"interl=-1"))
+ scale->interlaced=-1;
}
return 0;
{
ScaleContext *scale = ctx->priv;
sws_freeContext(scale->sws);
+ sws_freeContext(scale->isws[0]);
+ sws_freeContext(scale->isws[1]);
scale->sws = NULL;
}
if (ctx->outputs[0]) {
formats = NULL;
for (pix_fmt = 0; pix_fmt < PIX_FMT_NB; pix_fmt++)
- if ( sws_isSupportedOutput(pix_fmt)
+ if ( (sws_isSupportedOutput(pix_fmt) || pix_fmt == PIX_FMT_PAL8)
&& (ret = avfilter_add_format(&formats, pix_fmt)) < 0) {
avfilter_formats_unref(&formats);
return ret;
{
AVFilterContext *ctx = outlink->src;
AVFilterLink *inlink = outlink->src->inputs[0];
+ enum PixelFormat outfmt = outlink->format;
ScaleContext *scale = ctx->priv;
int64_t w, h;
double var_values[VARS_NB], res;
char *expr;
int ret;
- var_values[VAR_PI] = M_PI;
- var_values[VAR_PHI] = M_PHI;
- var_values[VAR_E] = M_E;
var_values[VAR_IN_W] = var_values[VAR_IW] = inlink->w;
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_A] = (float) 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_DAR] = var_values[VAR_A] * var_values[VAR_SAR];
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;
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,
- 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;
+ if (outfmt == PIX_FMT_PAL8) outfmt = PIX_FMT_BGR8;
+ scale->output_is_pal = av_pix_fmt_descriptors[outfmt].flags & PIX_FMT_PAL ||
+ av_pix_fmt_descriptors[outfmt].flags & PIX_FMT_PSEUDOPAL;
if (scale->sws)
sws_freeContext(scale->sws);
scale->sws = NULL;
else {
scale->sws = sws_getContext(inlink ->w, inlink ->h, inlink ->format,
- outlink->w, outlink->h, outlink->format,
+ outlink->w, outlink->h, outfmt,
scale->flags, NULL, NULL, NULL);
- if (!scale->sws)
+ if (scale->isws[0])
+ sws_freeContext(scale->isws[0]);
+ scale->isws[0] = sws_getContext(inlink ->w, inlink ->h/2, inlink ->format,
+ outlink->w, outlink->h/2, outfmt,
+ scale->flags, NULL, NULL, NULL);
+ if (scale->isws[1])
+ sws_freeContext(scale->isws[1]);
+ scale->isws[1] = sws_getContext(inlink ->w, inlink ->h/2, inlink ->format,
+ outlink->w, outlink->h/2, outfmt,
+ scale->flags, NULL, NULL, NULL);
+ if (!scale->sws || !scale->isws[0] || !scale->isws[1])
return AVERROR(EINVAL);
}
-
- if (inlink->sample_aspect_ratio.num)
- outlink->sample_aspect_ratio = av_mul_q((AVRational){outlink->h*inlink->w,
- outlink->w*inlink->h},
- inlink->sample_aspect_ratio);
- else
+ if (inlink->sample_aspect_ratio.num){
+ outlink->sample_aspect_ratio = av_mul_q((AVRational){outlink->h * inlink->w, outlink->w * inlink->h}, inlink->sample_aspect_ratio);
+ } else
outlink->sample_aspect_ratio = inlink->sample_aspect_ratio;
+ av_log(ctx, AV_LOG_INFO, "w:%d h:%d fmt:%s sar:%d/%d -> w:%d h:%d fmt:%s sar:%d/%d flags:0x%0x\n",
+ inlink ->w, inlink ->h, av_pix_fmt_descriptors[ inlink->format].name,
+ inlink->sample_aspect_ratio.num, inlink->sample_aspect_ratio.den,
+ outlink->w, outlink->h, av_pix_fmt_descriptors[outlink->format].name,
+ outlink->sample_aspect_ratio.num, outlink->sample_aspect_ratio.den,
+ scale->flags);
return 0;
fail:
av_log(NULL, AV_LOG_ERROR,
- "Error when evaluating the expression '%s'\n", expr);
+ "Error when evaluating the expression '%s'.\n"
+ "Maybe the expression for out_w:'%s' or for out_h:'%s' is self-referencing.\n",
+ expr, scale->w_expr, scale->h_expr);
return ret;
}
scale->hsub = av_pix_fmt_descriptors[link->format].log2_chroma_w;
scale->vsub = av_pix_fmt_descriptors[link->format].log2_chroma_h;
- outpicref = avfilter_get_video_buffer(outlink, AV_PERM_WRITE, outlink->w, outlink->h);
+ outpicref = avfilter_get_video_buffer(outlink, AV_PERM_WRITE|AV_PERM_ALIGN, outlink->w, outlink->h);
avfilter_copy_buffer_ref_props(outpicref, picref);
outpicref->video->w = outlink->w;
outpicref->video->h = outlink->h;
outlink->out_buf = outpicref;
+ if(scale->output_is_pal)
+ ff_set_systematic_pal2(outpicref->data[1], outlink->format == PIX_FMT_PAL8 ? PIX_FMT_BGR8 : outlink->format);
- 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(&outpicref->video->sample_aspect_ratio.num, &outpicref->video->sample_aspect_ratio.den,
+ (int64_t)picref->video->sample_aspect_ratio.num * outlink->h * link->w,
+ (int64_t)picref->video->sample_aspect_ratio.den * outlink->w * link->h,
INT_MAX);
scale->slice_y = 0;
avfilter_start_frame(outlink, avfilter_ref_buffer(outpicref, ~0));
}
+static int scale_slice(AVFilterLink *link, struct SwsContext *sws, int y, int h, int mul, int field)
+{
+ ScaleContext *scale = link->dst->priv;
+ AVFilterBufferRef *cur_pic = link->cur_buf;
+ AVFilterBufferRef *out_buf = link->dst->outputs[0]->out_buf;
+ const uint8_t *in[4];
+ uint8_t *out[4];
+ int in_stride[4],out_stride[4];
+ int i;
+
+ for(i=0; i<4; i++){
+ int vsub= ((i+1)&2) ? scale->vsub : 0;
+ in_stride[i] = cur_pic->linesize[i] * mul;
+ out_stride[i] = out_buf->linesize[i] * mul;
+ in[i] = cur_pic->data[i] + ((y>>vsub)+field) * cur_pic->linesize[i];
+ out[i] = out_buf->data[i] + field * out_buf->linesize[i];
+ }
+ if(scale->input_is_pal)
+ in[1] = cur_pic->data[1];
+ if(scale->output_is_pal)
+ out[1] = out_buf->data[1];
+
+ return sws_scale(sws, in, in_stride, y/mul, h,
+ out,out_stride);
+}
+
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];
if (!scale->sws) {
avfilter_draw_slice(link->dst->outputs[0], y, h, slice_dir);
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(scale->interlaced>0 || (scale->interlaced<0 && link->cur_buf->video->interlaced)){
+ av_assert0(y%(2<<scale->vsub) == 0);
+ out_h = scale_slice(link, scale->isws[0], y, (h+1)/2, 2, 0);
+ out_h+= scale_slice(link, scale->isws[1], y, h /2, 2, 1);
+ }else{
+ out_h = scale_slice(link, scale->sws, y, h, 1, 0);
+ }
if (slice_dir == -1)
scale->slice_y -= out_h;
.priv_size = sizeof(ScaleContext),
- .inputs = (AVFilterPad[]) {{ .name = "default",
+ .inputs = (const 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",
+ .outputs = (const AVFilterPad[]) {{ .name = "default",
.type = AVMEDIA_TYPE_VIDEO,
.config_props = config_props, },
{ .name = NULL}},
projects / ffmpeg / blobdiff