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Niklas Haas 18b9687308 avfilter/swscale: always fix interlaced chroma location
The current logic only fixes it when the user does not explicitly
specify the chroma location. However, this does not make a lot of sense.
Since there is no way to specify this property per-field, it effectively
*prevents* the user from being able to correctly scale interlaced frames
with top-aligned chroma.

It makes more sense to consider the user setting in the progressive case
only, and automatically adapt it to the correct interlaced field
positions, following the details of the MPEG specification.
2024-08-16 11:43:37 +02:00

1359 lines
48 KiB
C

/*
* Copyright (c) 2007 Bobby Bingham
*
* This file is part of FFmpeg.
*
* 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.
*
* 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 FFmpeg; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
/**
* @file
* scale video filter
*/
#include <float.h>
#include <stdio.h>
#include <string.h>
#include "avfilter.h"
#include "filters.h"
#include "formats.h"
#include "framesync.h"
#include "internal.h"
#include "scale_eval.h"
#include "video.h"
#include "libavutil/eval.h"
#include "libavutil/imgutils_internal.h"
#include "libavutil/internal.h"
#include "libavutil/mem.h"
#include "libavutil/opt.h"
#include "libavutil/parseutils.h"
#include "libavutil/pixdesc.h"
#include "libswscale/swscale.h"
static const char *const var_names[] = {
"in_w", "iw",
"in_h", "ih",
"out_w", "ow",
"out_h", "oh",
"a",
"sar",
"dar",
"hsub",
"vsub",
"ohsub",
"ovsub",
"n",
"t",
#if FF_API_FRAME_PKT
"pos",
#endif
"ref_w", "rw",
"ref_h", "rh",
"ref_a",
"ref_sar",
"ref_dar", "rdar",
"ref_hsub",
"ref_vsub",
"ref_n",
"ref_t",
"ref_pos",
/* Legacy variables for scale2ref */
"main_w",
"main_h",
"main_a",
"main_sar",
"main_dar", "mdar",
"main_hsub",
"main_vsub",
"main_n",
"main_t",
"main_pos",
NULL
};
enum var_name {
VAR_IN_W, VAR_IW,
VAR_IN_H, VAR_IH,
VAR_OUT_W, VAR_OW,
VAR_OUT_H, VAR_OH,
VAR_A,
VAR_SAR,
VAR_DAR,
VAR_HSUB,
VAR_VSUB,
VAR_OHSUB,
VAR_OVSUB,
VAR_N,
VAR_T,
#if FF_API_FRAME_PKT
VAR_POS,
#endif
VAR_REF_W, VAR_RW,
VAR_REF_H, VAR_RH,
VAR_REF_A,
VAR_REF_SAR,
VAR_REF_DAR, VAR_RDAR,
VAR_REF_HSUB,
VAR_REF_VSUB,
VAR_REF_N,
VAR_REF_T,
VAR_REF_POS,
VAR_S2R_MAIN_W,
VAR_S2R_MAIN_H,
VAR_S2R_MAIN_A,
VAR_S2R_MAIN_SAR,
VAR_S2R_MAIN_DAR, VAR_S2R_MDAR,
VAR_S2R_MAIN_HSUB,
VAR_S2R_MAIN_VSUB,
VAR_S2R_MAIN_N,
VAR_S2R_MAIN_T,
VAR_S2R_MAIN_POS,
VARS_NB
};
enum EvalMode {
EVAL_MODE_INIT,
EVAL_MODE_FRAME,
EVAL_MODE_NB
};
typedef struct ScaleContext {
const AVClass *class;
struct SwsContext *sws; ///< software scaler context
struct SwsContext *isws[2]; ///< software scaler context for interlaced material
// context used for forwarding options to sws
struct SwsContext *sws_opts;
FFFrameSync fs;
/**
* New dimensions. Special values are:
* 0 = original width/height
* -1 = keep original aspect
* -N = try to keep aspect but make sure it is divisible by N
*/
int w, h;
char *size_str;
double param[2]; // sws params
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;
int uses_ref;
char *w_expr; ///< width expression string
char *h_expr; ///< height expression string
AVExpr *w_pexpr;
AVExpr *h_pexpr;
double var_values[VARS_NB];
char *flags_str;
int in_color_matrix;
int out_color_matrix;
int in_range;
int out_range;
int out_h_chr_pos;
int out_v_chr_pos;
int in_h_chr_pos;
int in_v_chr_pos;
int force_original_aspect_ratio;
int force_divisible_by;
int eval_mode; ///< expression evaluation mode
} ScaleContext;
const AVFilter ff_vf_scale2ref;
static int config_props(AVFilterLink *outlink);
static int check_exprs(AVFilterContext *ctx)
{
ScaleContext *scale = ctx->priv;
unsigned vars_w[VARS_NB] = { 0 }, vars_h[VARS_NB] = { 0 };
if (!scale->w_pexpr && !scale->h_pexpr)
return AVERROR(EINVAL);
if (scale->w_pexpr)
av_expr_count_vars(scale->w_pexpr, vars_w, VARS_NB);
if (scale->h_pexpr)
av_expr_count_vars(scale->h_pexpr, vars_h, VARS_NB);
if (vars_w[VAR_OUT_W] || vars_w[VAR_OW]) {
av_log(ctx, AV_LOG_ERROR, "Width expression cannot be self-referencing: '%s'.\n", scale->w_expr);
return AVERROR(EINVAL);
}
if (vars_h[VAR_OUT_H] || vars_h[VAR_OH]) {
av_log(ctx, AV_LOG_ERROR, "Height expression cannot be self-referencing: '%s'.\n", scale->h_expr);
return AVERROR(EINVAL);
}
if ((vars_w[VAR_OUT_H] || vars_w[VAR_OH]) &&
(vars_h[VAR_OUT_W] || vars_h[VAR_OW])) {
av_log(ctx, AV_LOG_WARNING, "Circular references detected for width '%s' and height '%s' - possibly invalid.\n", scale->w_expr, scale->h_expr);
}
if (vars_w[VAR_REF_W] || vars_h[VAR_REF_W] ||
vars_w[VAR_RW] || vars_h[VAR_RW] ||
vars_w[VAR_REF_H] || vars_h[VAR_REF_H] ||
vars_w[VAR_RH] || vars_h[VAR_RH] ||
vars_w[VAR_REF_A] || vars_h[VAR_REF_A] ||
vars_w[VAR_REF_SAR] || vars_h[VAR_REF_SAR] ||
vars_w[VAR_REF_DAR] || vars_h[VAR_REF_DAR] ||
vars_w[VAR_RDAR] || vars_h[VAR_RDAR] ||
vars_w[VAR_REF_HSUB] || vars_h[VAR_REF_HSUB] ||
vars_w[VAR_REF_VSUB] || vars_h[VAR_REF_VSUB] ||
vars_w[VAR_REF_N] || vars_h[VAR_REF_N] ||
vars_w[VAR_REF_T] || vars_h[VAR_REF_T] ||
vars_w[VAR_REF_POS] || vars_h[VAR_REF_POS]) {
scale->uses_ref = 1;
}
if (ctx->filter != &ff_vf_scale2ref &&
(vars_w[VAR_S2R_MAIN_W] || vars_h[VAR_S2R_MAIN_W] ||
vars_w[VAR_S2R_MAIN_H] || vars_h[VAR_S2R_MAIN_H] ||
vars_w[VAR_S2R_MAIN_A] || vars_h[VAR_S2R_MAIN_A] ||
vars_w[VAR_S2R_MAIN_SAR] || vars_h[VAR_S2R_MAIN_SAR] ||
vars_w[VAR_S2R_MAIN_DAR] || vars_h[VAR_S2R_MAIN_DAR] ||
vars_w[VAR_S2R_MDAR] || vars_h[VAR_S2R_MDAR] ||
vars_w[VAR_S2R_MAIN_HSUB] || vars_h[VAR_S2R_MAIN_HSUB] ||
vars_w[VAR_S2R_MAIN_VSUB] || vars_h[VAR_S2R_MAIN_VSUB] ||
vars_w[VAR_S2R_MAIN_N] || vars_h[VAR_S2R_MAIN_N] ||
vars_w[VAR_S2R_MAIN_T] || vars_h[VAR_S2R_MAIN_T] ||
vars_w[VAR_S2R_MAIN_POS] || vars_h[VAR_S2R_MAIN_POS]) ) {
av_log(ctx, AV_LOG_ERROR, "Expressions with scale2ref variables are not valid in scale filter.\n");
return AVERROR(EINVAL);
}
if (ctx->filter != &ff_vf_scale2ref &&
(vars_w[VAR_S2R_MAIN_W] || vars_h[VAR_S2R_MAIN_W] ||
vars_w[VAR_S2R_MAIN_H] || vars_h[VAR_S2R_MAIN_H] ||
vars_w[VAR_S2R_MAIN_A] || vars_h[VAR_S2R_MAIN_A] ||
vars_w[VAR_S2R_MAIN_SAR] || vars_h[VAR_S2R_MAIN_SAR] ||
vars_w[VAR_S2R_MAIN_DAR] || vars_h[VAR_S2R_MAIN_DAR] ||
vars_w[VAR_S2R_MDAR] || vars_h[VAR_S2R_MDAR] ||
vars_w[VAR_S2R_MAIN_HSUB] || vars_h[VAR_S2R_MAIN_HSUB] ||
vars_w[VAR_S2R_MAIN_VSUB] || vars_h[VAR_S2R_MAIN_VSUB] ||
vars_w[VAR_S2R_MAIN_N] || vars_h[VAR_S2R_MAIN_N] ||
vars_w[VAR_S2R_MAIN_T] || vars_h[VAR_S2R_MAIN_T] ||
vars_w[VAR_S2R_MAIN_POS] || vars_h[VAR_S2R_MAIN_POS]) ) {
av_log(ctx, AV_LOG_ERROR, "Expressions with scale2ref variables are not valid in scale filter.\n");
return AVERROR(EINVAL);
}
if (scale->eval_mode == EVAL_MODE_INIT &&
(vars_w[VAR_N] || vars_h[VAR_N] ||
vars_w[VAR_T] || vars_h[VAR_T] ||
#if FF_API_FRAME_PKT
vars_w[VAR_POS] || vars_h[VAR_POS] ||
#endif
vars_w[VAR_S2R_MAIN_N] || vars_h[VAR_S2R_MAIN_N] ||
vars_w[VAR_S2R_MAIN_T] || vars_h[VAR_S2R_MAIN_T] ||
vars_w[VAR_S2R_MAIN_POS] || vars_h[VAR_S2R_MAIN_POS]) ) {
av_log(ctx, AV_LOG_ERROR, "Expressions with frame variables 'n', 't', 'pos' are not valid in init eval_mode.\n");
return AVERROR(EINVAL);
}
return 0;
}
static int scale_parse_expr(AVFilterContext *ctx, char *str_expr, AVExpr **pexpr_ptr, const char *var, const char *args)
{
ScaleContext *scale = ctx->priv;
int ret, is_inited = 0;
char *old_str_expr = NULL;
AVExpr *old_pexpr = NULL;
if (str_expr) {
old_str_expr = av_strdup(str_expr);
if (!old_str_expr)
return AVERROR(ENOMEM);
av_opt_set(scale, var, args, 0);
}
if (*pexpr_ptr) {
old_pexpr = *pexpr_ptr;
*pexpr_ptr = NULL;
is_inited = 1;
}
ret = av_expr_parse(pexpr_ptr, args, var_names,
NULL, NULL, NULL, NULL, 0, ctx);
if (ret < 0) {
av_log(ctx, AV_LOG_ERROR, "Cannot parse expression for %s: '%s'\n", var, args);
goto revert;
}
ret = check_exprs(ctx);
if (ret < 0)
goto revert;
if (is_inited && (ret = config_props(ctx->outputs[0])) < 0)
goto revert;
av_expr_free(old_pexpr);
old_pexpr = NULL;
av_freep(&old_str_expr);
return 0;
revert:
av_expr_free(*pexpr_ptr);
*pexpr_ptr = NULL;
if (old_str_expr) {
av_opt_set(scale, var, old_str_expr, 0);
av_free(old_str_expr);
}
if (old_pexpr)
*pexpr_ptr = old_pexpr;
return ret;
}
static av_cold int preinit(AVFilterContext *ctx)
{
ScaleContext *scale = ctx->priv;
int ret;
scale->sws_opts = sws_alloc_context();
if (!scale->sws_opts)
return AVERROR(ENOMEM);
// set threads=0, so we can later check whether the user modified it
ret = av_opt_set_int(scale->sws_opts, "threads", 0, 0);
if (ret < 0)
return ret;
ff_framesync_preinit(&scale->fs);
return 0;
}
static const int sws_colorspaces[] = {
AVCOL_SPC_UNSPECIFIED,
AVCOL_SPC_RGB,
AVCOL_SPC_BT709,
AVCOL_SPC_BT470BG,
AVCOL_SPC_SMPTE170M,
AVCOL_SPC_FCC,
AVCOL_SPC_SMPTE240M,
AVCOL_SPC_BT2020_NCL,
-1
};
static int do_scale(FFFrameSync *fs);
static av_cold int init(AVFilterContext *ctx)
{
ScaleContext *scale = ctx->priv;
int64_t threads;
int ret;
if (ctx->filter == &ff_vf_scale2ref)
av_log(ctx, AV_LOG_WARNING, "scale2ref is deprecated, use scale=rw:rh instead\n");
if (scale->size_str && (scale->w_expr || scale->h_expr)) {
av_log(ctx, AV_LOG_ERROR,
"Size and width/height expressions cannot be set at the same time.\n");
return AVERROR(EINVAL);
}
if (scale->w_expr && !scale->h_expr)
FFSWAP(char *, scale->w_expr, scale->size_str);
if (scale->size_str) {
char buf[32];
if ((ret = av_parse_video_size(&scale->w, &scale->h, scale->size_str)) < 0) {
av_log(ctx, AV_LOG_ERROR,
"Invalid size '%s'\n", scale->size_str);
return ret;
}
snprintf(buf, sizeof(buf)-1, "%d", scale->w);
av_opt_set(scale, "w", buf, 0);
snprintf(buf, sizeof(buf)-1, "%d", scale->h);
av_opt_set(scale, "h", buf, 0);
}
if (!scale->w_expr)
av_opt_set(scale, "w", "iw", 0);
if (!scale->h_expr)
av_opt_set(scale, "h", "ih", 0);
ret = scale_parse_expr(ctx, NULL, &scale->w_pexpr, "width", scale->w_expr);
if (ret < 0)
return ret;
ret = scale_parse_expr(ctx, NULL, &scale->h_pexpr, "height", scale->h_expr);
if (ret < 0)
return ret;
if (scale->in_color_matrix != -1 &&
!ff_fmt_is_in(scale->in_color_matrix, sws_colorspaces)) {
av_log(ctx, AV_LOG_ERROR, "Unsupported input color matrix '%s'\n",
av_color_space_name(scale->in_color_matrix));
return AVERROR(EINVAL);
}
if (!ff_fmt_is_in(scale->out_color_matrix, sws_colorspaces)) {
av_log(ctx, AV_LOG_ERROR, "Unsupported output color matrix '%s'\n",
av_color_space_name(scale->out_color_matrix));
return AVERROR(EINVAL);
}
av_log(ctx, AV_LOG_VERBOSE, "w:%s h:%s flags:'%s' interl:%d\n",
scale->w_expr, scale->h_expr, (char *)av_x_if_null(scale->flags_str, ""), scale->interlaced);
if (scale->flags_str && *scale->flags_str) {
ret = av_opt_set(scale->sws_opts, "sws_flags", scale->flags_str, 0);
if (ret < 0)
return ret;
}
for (int i = 0; i < FF_ARRAY_ELEMS(scale->param); i++)
if (scale->param[i] != DBL_MAX) {
ret = av_opt_set_double(scale->sws_opts, i ? "param1" : "param0",
scale->param[i], 0);
if (ret < 0)
return ret;
}
// use generic thread-count if the user did not set it explicitly
ret = av_opt_get_int(scale->sws_opts, "threads", 0, &threads);
if (ret < 0)
return ret;
if (!threads)
av_opt_set_int(scale->sws_opts, "threads", ff_filter_get_nb_threads(ctx), 0);
if (ctx->filter != &ff_vf_scale2ref && scale->uses_ref) {
AVFilterPad pad = {
.name = "ref",
.type = AVMEDIA_TYPE_VIDEO,
};
ret = ff_append_inpad(ctx, &pad);
if (ret < 0)
return ret;
}
return 0;
}
static av_cold void uninit(AVFilterContext *ctx)
{
ScaleContext *scale = ctx->priv;
av_expr_free(scale->w_pexpr);
av_expr_free(scale->h_pexpr);
scale->w_pexpr = scale->h_pexpr = NULL;
ff_framesync_uninit(&scale->fs);
sws_freeContext(scale->sws_opts);
sws_freeContext(scale->sws);
sws_freeContext(scale->isws[0]);
sws_freeContext(scale->isws[1]);
scale->sws = NULL;
}
static int query_formats(AVFilterContext *ctx)
{
ScaleContext *scale = ctx->priv;
AVFilterFormats *formats;
const AVPixFmtDescriptor *desc;
enum AVPixelFormat pix_fmt;
int ret;
desc = NULL;
formats = NULL;
while ((desc = av_pix_fmt_desc_next(desc))) {
pix_fmt = av_pix_fmt_desc_get_id(desc);
if ((sws_isSupportedInput(pix_fmt) ||
sws_isSupportedEndiannessConversion(pix_fmt))
&& (ret = ff_add_format(&formats, pix_fmt)) < 0) {
return ret;
}
}
if ((ret = ff_formats_ref(formats, &ctx->inputs[0]->outcfg.formats)) < 0)
return ret;
desc = NULL;
formats = NULL;
while ((desc = av_pix_fmt_desc_next(desc))) {
pix_fmt = av_pix_fmt_desc_get_id(desc);
if ((sws_isSupportedOutput(pix_fmt) || pix_fmt == AV_PIX_FMT_PAL8 ||
sws_isSupportedEndiannessConversion(pix_fmt))
&& (ret = ff_add_format(&formats, pix_fmt)) < 0) {
return ret;
}
}
if ((ret = ff_formats_ref(formats, &ctx->outputs[0]->incfg.formats)) < 0)
return ret;
/* accept all supported inputs, even if user overrides their properties */
if ((ret = ff_formats_ref(ff_make_format_list(sws_colorspaces),
&ctx->inputs[0]->outcfg.color_spaces)) < 0)
return ret;
if ((ret = ff_formats_ref(ff_all_color_ranges(),
&ctx->inputs[0]->outcfg.color_ranges)) < 0)
return ret;
/* propagate output properties if overridden */
formats = scale->out_color_matrix != AVCOL_SPC_UNSPECIFIED
? ff_make_formats_list_singleton(scale->out_color_matrix)
: ff_make_format_list(sws_colorspaces);
if ((ret = ff_formats_ref(formats, &ctx->outputs[0]->incfg.color_spaces)) < 0)
return ret;
formats = scale->out_range != AVCOL_RANGE_UNSPECIFIED
? ff_make_formats_list_singleton(scale->out_range)
: ff_all_color_ranges();
if ((ret = ff_formats_ref(formats, &ctx->outputs[0]->incfg.color_ranges)) < 0)
return ret;
return 0;
}
static int scale_eval_dimensions(AVFilterContext *ctx)
{
ScaleContext *scale = ctx->priv;
const char scale2ref = ctx->filter == &ff_vf_scale2ref;
const AVFilterLink *inlink = scale2ref ? ctx->inputs[1] : ctx->inputs[0];
const AVFilterLink *outlink = ctx->outputs[0];
const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(inlink->format);
const AVPixFmtDescriptor *out_desc = av_pix_fmt_desc_get(outlink->format);
char *expr;
int eval_w, eval_h;
int ret;
double res;
const AVPixFmtDescriptor *main_desc;
const AVFilterLink *main_link;
if (scale2ref) {
main_link = ctx->inputs[0];
main_desc = av_pix_fmt_desc_get(main_link->format);
}
scale->var_values[VAR_IN_W] = scale->var_values[VAR_IW] = inlink->w;
scale->var_values[VAR_IN_H] = scale->var_values[VAR_IH] = inlink->h;
scale->var_values[VAR_OUT_W] = scale->var_values[VAR_OW] = NAN;
scale->var_values[VAR_OUT_H] = scale->var_values[VAR_OH] = NAN;
scale->var_values[VAR_A] = (double) inlink->w / inlink->h;
scale->var_values[VAR_SAR] = inlink->sample_aspect_ratio.num ?
(double) inlink->sample_aspect_ratio.num / inlink->sample_aspect_ratio.den : 1;
scale->var_values[VAR_DAR] = scale->var_values[VAR_A] * scale->var_values[VAR_SAR];
scale->var_values[VAR_HSUB] = 1 << desc->log2_chroma_w;
scale->var_values[VAR_VSUB] = 1 << desc->log2_chroma_h;
scale->var_values[VAR_OHSUB] = 1 << out_desc->log2_chroma_w;
scale->var_values[VAR_OVSUB] = 1 << out_desc->log2_chroma_h;
if (scale2ref) {
scale->var_values[VAR_S2R_MAIN_W] = main_link->w;
scale->var_values[VAR_S2R_MAIN_H] = main_link->h;
scale->var_values[VAR_S2R_MAIN_A] = (double) main_link->w / main_link->h;
scale->var_values[VAR_S2R_MAIN_SAR] = main_link->sample_aspect_ratio.num ?
(double) main_link->sample_aspect_ratio.num / main_link->sample_aspect_ratio.den : 1;
scale->var_values[VAR_S2R_MAIN_DAR] = scale->var_values[VAR_S2R_MDAR] =
scale->var_values[VAR_S2R_MAIN_A] * scale->var_values[VAR_S2R_MAIN_SAR];
scale->var_values[VAR_S2R_MAIN_HSUB] = 1 << main_desc->log2_chroma_w;
scale->var_values[VAR_S2R_MAIN_VSUB] = 1 << main_desc->log2_chroma_h;
}
if (scale->uses_ref) {
const AVFilterLink *reflink = ctx->inputs[1];
const AVPixFmtDescriptor *ref_desc = av_pix_fmt_desc_get(reflink->format);
scale->var_values[VAR_REF_W] = scale->var_values[VAR_RW] = reflink->w;
scale->var_values[VAR_REF_H] = scale->var_values[VAR_RH] = reflink->h;
scale->var_values[VAR_REF_A] = (double) reflink->w / reflink->h;
scale->var_values[VAR_REF_SAR] = reflink->sample_aspect_ratio.num ?
(double) reflink->sample_aspect_ratio.num / reflink->sample_aspect_ratio.den : 1;
scale->var_values[VAR_REF_DAR] = scale->var_values[VAR_RDAR] =
scale->var_values[VAR_REF_A] * scale->var_values[VAR_REF_SAR];
scale->var_values[VAR_REF_HSUB] = 1 << ref_desc->log2_chroma_w;
scale->var_values[VAR_REF_VSUB] = 1 << ref_desc->log2_chroma_h;
}
res = av_expr_eval(scale->w_pexpr, scale->var_values, NULL);
eval_w = scale->var_values[VAR_OUT_W] = scale->var_values[VAR_OW] = (int) res == 0 ? inlink->w : (int) res;
res = av_expr_eval(scale->h_pexpr, scale->var_values, NULL);
if (isnan(res)) {
expr = scale->h_expr;
ret = AVERROR(EINVAL);
goto fail;
}
eval_h = scale->var_values[VAR_OUT_H] = scale->var_values[VAR_OH] = (int) res == 0 ? inlink->h : (int) res;
res = av_expr_eval(scale->w_pexpr, scale->var_values, NULL);
if (isnan(res)) {
expr = scale->w_expr;
ret = AVERROR(EINVAL);
goto fail;
}
eval_w = scale->var_values[VAR_OUT_W] = scale->var_values[VAR_OW] = (int) res == 0 ? inlink->w : (int) res;
scale->w = eval_w;
scale->h = eval_h;
return 0;
fail:
av_log(ctx, AV_LOG_ERROR,
"Error when evaluating the expression '%s'.\n", expr);
return ret;
}
static int config_props(AVFilterLink *outlink)
{
AVFilterContext *ctx = outlink->src;
AVFilterLink *inlink0 = outlink->src->inputs[0];
AVFilterLink *inlink = ctx->filter == &ff_vf_scale2ref ?
outlink->src->inputs[1] :
outlink->src->inputs[0];
enum AVPixelFormat outfmt = outlink->format;
const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(inlink->format);
const AVPixFmtDescriptor *outdesc = av_pix_fmt_desc_get(outfmt);
ScaleContext *scale = ctx->priv;
uint8_t *flags_val = NULL;
int in_range, in_colorspace;
int ret;
if ((ret = scale_eval_dimensions(ctx)) < 0)
goto fail;
outlink->w = scale->w;
outlink->h = scale->h;
ret = ff_scale_adjust_dimensions(inlink, &outlink->w, &outlink->h,
scale->force_original_aspect_ratio,
scale->force_divisible_by);
if (ret < 0)
goto fail;
if (outlink->w > INT_MAX ||
outlink->h > INT_MAX ||
(outlink->h * inlink->w) > INT_MAX ||
(outlink->w * inlink->h) > INT_MAX)
av_log(ctx, AV_LOG_ERROR, "Rescaled value for width or height is too big.\n");
/* TODO: make algorithm configurable */
scale->input_is_pal = desc->flags & AV_PIX_FMT_FLAG_PAL;
if (outfmt == AV_PIX_FMT_PAL8) outfmt = AV_PIX_FMT_BGR8;
scale->output_is_pal = av_pix_fmt_desc_get(outfmt)->flags & AV_PIX_FMT_FLAG_PAL;
in_range = scale->in_range;
if (in_range == AVCOL_RANGE_UNSPECIFIED)
in_range = inlink0->color_range;
in_colorspace = scale->in_color_matrix;
if (in_colorspace == -1 /* auto */)
in_colorspace = inlink0->colorspace;
if (scale->sws)
sws_freeContext(scale->sws);
if (scale->isws[0])
sws_freeContext(scale->isws[0]);
if (scale->isws[1])
sws_freeContext(scale->isws[1]);
scale->isws[0] = scale->isws[1] = scale->sws = NULL;
if (inlink0->w == outlink->w &&
inlink0->h == outlink->h &&
in_range == outlink->color_range &&
in_colorspace == outlink->colorspace &&
inlink0->format == outlink->format)
;
else {
struct SwsContext **swscs[3] = {&scale->sws, &scale->isws[0], &scale->isws[1]};
int i;
for (i = 0; i < 3; i++) {
int in_v_chr_pos = scale->in_v_chr_pos, out_v_chr_pos = scale->out_v_chr_pos;
int in_full, out_full, brightness, contrast, saturation;
const int *inv_table, *table;
struct SwsContext *const s = sws_alloc_context();
if (!s)
return AVERROR(ENOMEM);
*swscs[i] = s;
ret = av_opt_copy(s, scale->sws_opts);
if (ret < 0)
return ret;
av_opt_set_int(s, "srcw", inlink0 ->w, 0);
av_opt_set_int(s, "srch", inlink0 ->h >> !!i, 0);
av_opt_set_int(s, "src_format", inlink0->format, 0);
av_opt_set_int(s, "dstw", outlink->w, 0);
av_opt_set_int(s, "dsth", outlink->h >> !!i, 0);
av_opt_set_int(s, "dst_format", outfmt, 0);
if (in_range != AVCOL_RANGE_UNSPECIFIED)
av_opt_set_int(s, "src_range",
in_range == AVCOL_RANGE_JPEG, 0);
if (outlink->color_range != AVCOL_RANGE_UNSPECIFIED)
av_opt_set_int(s, "dst_range",
outlink->color_range == AVCOL_RANGE_JPEG, 0);
/* Override chroma location default settings to have the correct
* chroma positions. MPEG chroma positions are used by convention.
* Note that this works for both MPEG-1/JPEG and MPEG-2/4 chroma
* locations, since they share a vertical alignment */
if (desc->log2_chroma_h == 1) {
if (in_v_chr_pos == -513)
in_v_chr_pos = 128; /* explicitly default missing info */
in_v_chr_pos += 256 * (i == 2); /* offset by one luma row for odd rows */
in_v_chr_pos >>= i > 0; /* double luma row distance */
}
if (outdesc->log2_chroma_h == 1) {
if (out_v_chr_pos == -513)
out_v_chr_pos = 128;
out_v_chr_pos += 256 * (i == 2);
out_v_chr_pos >>= i > 0;
}
av_opt_set_int(s, "src_h_chr_pos", scale->in_h_chr_pos, 0);
av_opt_set_int(s, "src_v_chr_pos", in_v_chr_pos, 0);
av_opt_set_int(s, "dst_h_chr_pos", scale->out_h_chr_pos, 0);
av_opt_set_int(s, "dst_v_chr_pos", out_v_chr_pos, 0);
if ((ret = sws_init_context(s, NULL, NULL)) < 0)
return ret;
sws_getColorspaceDetails(s, (int **)&inv_table, &in_full,
(int **)&table, &out_full,
&brightness, &contrast, &saturation);
if (scale->in_color_matrix == -1 /* auto */)
inv_table = sws_getCoefficients(inlink0->colorspace);
else if (scale->in_color_matrix != AVCOL_SPC_UNSPECIFIED)
inv_table = sws_getCoefficients(scale->in_color_matrix);
if (outlink->colorspace != AVCOL_SPC_UNSPECIFIED)
table = sws_getCoefficients(outlink->colorspace);
else if (scale->in_color_matrix != AVCOL_SPC_UNSPECIFIED)
table = inv_table;
sws_setColorspaceDetails(s, inv_table, in_full,
table, out_full,
brightness, contrast, saturation);
if (!scale->interlaced)
break;
}
}
if (inlink0->sample_aspect_ratio.num){
outlink->sample_aspect_ratio = av_mul_q((AVRational){outlink->h * inlink0->w, outlink->w * inlink0->h}, inlink0->sample_aspect_ratio);
} else
outlink->sample_aspect_ratio = inlink0->sample_aspect_ratio;
if (scale->sws)
av_opt_get(scale->sws, "sws_flags", 0, &flags_val);
av_log(ctx, AV_LOG_VERBOSE, "w:%d h:%d fmt:%s csp:%s range:%s sar:%d/%d -> w:%d h:%d fmt:%s csp:%s range:%s sar:%d/%d flags:%s\n",
inlink ->w, inlink ->h, av_get_pix_fmt_name( inlink->format),
av_color_space_name(inlink->colorspace), av_color_range_name(inlink->color_range),
inlink->sample_aspect_ratio.num, inlink->sample_aspect_ratio.den,
outlink->w, outlink->h, av_get_pix_fmt_name(outlink->format),
av_color_space_name(outlink->colorspace), av_color_range_name(outlink->color_range),
outlink->sample_aspect_ratio.num, outlink->sample_aspect_ratio.den,
flags_val);
av_freep(&flags_val);
if (ctx->filter != &ff_vf_scale2ref) {
ff_framesync_uninit(&scale->fs);
ret = ff_framesync_init(&scale->fs, ctx, ctx->nb_inputs);
if (ret < 0)
return ret;
scale->fs.on_event = do_scale;
scale->fs.in[0].time_base = ctx->inputs[0]->time_base;
scale->fs.in[0].sync = 1;
scale->fs.in[0].before = EXT_STOP;
scale->fs.in[0].after = EXT_STOP;
if (scale->uses_ref) {
av_assert0(ctx->nb_inputs == 2);
scale->fs.in[1].time_base = ctx->inputs[1]->time_base;
scale->fs.in[1].sync = 0;
scale->fs.in[1].before = EXT_NULL;
scale->fs.in[1].after = EXT_INFINITY;
}
ret = ff_framesync_configure(&scale->fs);
if (ret < 0)
return ret;
}
return 0;
fail:
return ret;
}
static int config_props_ref(AVFilterLink *outlink)
{
AVFilterLink *inlink = outlink->src->inputs[1];
FilterLink *il = ff_filter_link(inlink);
FilterLink *ol = ff_filter_link(outlink);
outlink->w = inlink->w;
outlink->h = inlink->h;
outlink->sample_aspect_ratio = inlink->sample_aspect_ratio;
outlink->time_base = inlink->time_base;
ol->frame_rate = il->frame_rate;
outlink->colorspace = inlink->colorspace;
outlink->color_range = inlink->color_range;
return 0;
}
static int request_frame(AVFilterLink *outlink)
{
return ff_request_frame(outlink->src->inputs[0]);
}
static int request_frame_ref(AVFilterLink *outlink)
{
return ff_request_frame(outlink->src->inputs[1]);
}
static void frame_offset(AVFrame *frame, int dir, int is_pal)
{
for (int i = 0; i < 4 && frame->data[i]; i++) {
if (i == 1 && is_pal)
break;
frame->data[i] += frame->linesize[i] * dir;
}
}
static int scale_field(ScaleContext *scale, AVFrame *dst, AVFrame *src,
int field)
{
int orig_h_src = src->height;
int orig_h_dst = dst->height;
int ret;
// offset the data pointers for the bottom field
if (field) {
frame_offset(src, 1, scale->input_is_pal);
frame_offset(dst, 1, scale->output_is_pal);
}
// take every second line
for (int i = 0; i < 4; i++) {
src->linesize[i] *= 2;
dst->linesize[i] *= 2;
}
src->height /= 2;
dst->height /= 2;
ret = sws_scale_frame(scale->isws[field], dst, src);
if (ret < 0)
return ret;
// undo the changes we made above
for (int i = 0; i < 4; i++) {
src->linesize[i] /= 2;
dst->linesize[i] /= 2;
}
src->height = orig_h_src;
dst->height = orig_h_dst;
if (field) {
frame_offset(src, -1, scale->input_is_pal);
frame_offset(dst, -1, scale->output_is_pal);
}
return 0;
}
/* Takes over ownership of *frame_in, passes ownership of *frame_out to caller */
static int scale_frame(AVFilterLink *link, AVFrame **frame_in,
AVFrame **frame_out)
{
FilterLink *inl = ff_filter_link(link);
AVFilterContext *ctx = link->dst;
ScaleContext *scale = ctx->priv;
AVFilterLink *outlink = ctx->outputs[0];
AVFrame *out, *in = *frame_in;
const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(link->format);
char buf[32];
int ret;
int frame_changed;
*frame_in = NULL;
if (in->colorspace == AVCOL_SPC_YCGCO)
av_log(link->dst, AV_LOG_WARNING, "Detected unsupported YCgCo colorspace.\n");
frame_changed = in->width != link->w ||
in->height != link->h ||
in->format != link->format ||
in->sample_aspect_ratio.den != link->sample_aspect_ratio.den ||
in->sample_aspect_ratio.num != link->sample_aspect_ratio.num ||
in->colorspace != link->colorspace ||
in->color_range != link->color_range;
if (scale->eval_mode == EVAL_MODE_FRAME || frame_changed) {
unsigned vars_w[VARS_NB] = { 0 }, vars_h[VARS_NB] = { 0 };
av_expr_count_vars(scale->w_pexpr, vars_w, VARS_NB);
av_expr_count_vars(scale->h_pexpr, vars_h, VARS_NB);
if (scale->eval_mode == EVAL_MODE_FRAME &&
!frame_changed &&
ctx->filter != &ff_vf_scale2ref &&
!(vars_w[VAR_N] || vars_w[VAR_T]
#if FF_API_FRAME_PKT
|| vars_w[VAR_POS]
#endif
) &&
!(vars_h[VAR_N] || vars_h[VAR_T]
#if FF_API_FRAME_PKT
|| vars_h[VAR_POS]
#endif
) &&
scale->w && scale->h)
goto scale;
if (scale->eval_mode == EVAL_MODE_INIT) {
snprintf(buf, sizeof(buf) - 1, "%d", scale->w);
av_opt_set(scale, "w", buf, 0);
snprintf(buf, sizeof(buf) - 1, "%d", scale->h);
av_opt_set(scale, "h", buf, 0);
ret = scale_parse_expr(ctx, NULL, &scale->w_pexpr, "width", scale->w_expr);
if (ret < 0)
goto err;
ret = scale_parse_expr(ctx, NULL, &scale->h_pexpr, "height", scale->h_expr);
if (ret < 0)
goto err;
}
if (ctx->filter == &ff_vf_scale2ref) {
scale->var_values[VAR_S2R_MAIN_N] = inl->frame_count_out;
scale->var_values[VAR_S2R_MAIN_T] = TS2T(in->pts, link->time_base);
#if FF_API_FRAME_PKT
FF_DISABLE_DEPRECATION_WARNINGS
scale->var_values[VAR_S2R_MAIN_POS] = in->pkt_pos == -1 ? NAN : in->pkt_pos;
FF_ENABLE_DEPRECATION_WARNINGS
#endif
} else {
scale->var_values[VAR_N] = inl->frame_count_out;
scale->var_values[VAR_T] = TS2T(in->pts, link->time_base);
#if FF_API_FRAME_PKT
FF_DISABLE_DEPRECATION_WARNINGS
scale->var_values[VAR_POS] = in->pkt_pos == -1 ? NAN : in->pkt_pos;
FF_ENABLE_DEPRECATION_WARNINGS
#endif
}
link->dst->inputs[0]->format = in->format;
link->dst->inputs[0]->w = in->width;
link->dst->inputs[0]->h = in->height;
link->dst->inputs[0]->colorspace = in->colorspace;
link->dst->inputs[0]->color_range = in->color_range;
link->dst->inputs[0]->sample_aspect_ratio.den = in->sample_aspect_ratio.den;
link->dst->inputs[0]->sample_aspect_ratio.num = in->sample_aspect_ratio.num;
if ((ret = config_props(outlink)) < 0)
goto err;
}
scale:
if (!scale->sws) {
*frame_out = in;
return 0;
}
scale->hsub = desc->log2_chroma_w;
scale->vsub = desc->log2_chroma_h;
out = ff_get_video_buffer(outlink, outlink->w, outlink->h);
if (!out) {
ret = AVERROR(ENOMEM);
goto err;
}
av_frame_copy_props(out, in);
out->width = outlink->w;
out->height = outlink->h;
out->color_range = outlink->color_range;
out->colorspace = outlink->colorspace;
if (scale->output_is_pal)
avpriv_set_systematic_pal2((uint32_t*)out->data[1], outlink->format == AV_PIX_FMT_PAL8 ? AV_PIX_FMT_BGR8 : outlink->format);
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);
if (scale->interlaced>0 || (scale->interlaced<0 &&
(in->flags & AV_FRAME_FLAG_INTERLACED))) {
ret = scale_field(scale, out, in, 0);
if (ret >= 0)
ret = scale_field(scale, out, in, 1);
} else {
ret = sws_scale_frame(scale->sws, out, in);
}
if (ret < 0)
av_frame_free(&out);
*frame_out = out;
err:
av_frame_free(&in);
return ret;
}
static int do_scale(FFFrameSync *fs)
{
AVFilterContext *ctx = fs->parent;
ScaleContext *scale = ctx->priv;
AVFilterLink *outlink = ctx->outputs[0];
AVFrame *out, *in = NULL, *ref = NULL;
int ret = 0, frame_changed;
ret = ff_framesync_get_frame(fs, 0, &in, 1);
if (ret < 0)
goto err;
if (scale->uses_ref) {
ret = ff_framesync_get_frame(fs, 1, &ref, 0);
if (ret < 0)
goto err;
}
if (ref) {
AVFilterLink *reflink = ctx->inputs[1];
FilterLink *rl = ff_filter_link(reflink);
frame_changed = ref->width != reflink->w ||
ref->height != reflink->h ||
ref->format != reflink->format ||
ref->sample_aspect_ratio.den != reflink->sample_aspect_ratio.den ||
ref->sample_aspect_ratio.num != reflink->sample_aspect_ratio.num ||
ref->colorspace != reflink->colorspace ||
ref->color_range != reflink->color_range;
if (frame_changed) {
reflink->format = ref->format;
reflink->w = ref->width;
reflink->h = ref->height;
reflink->sample_aspect_ratio.num = ref->sample_aspect_ratio.num;
reflink->sample_aspect_ratio.den = ref->sample_aspect_ratio.den;
reflink->colorspace = ref->colorspace;
reflink->color_range = ref->color_range;
ret = config_props(outlink);
if (ret < 0)
goto err;
}
if (scale->eval_mode == EVAL_MODE_FRAME) {
scale->var_values[VAR_REF_N] = rl->frame_count_out;
scale->var_values[VAR_REF_T] = TS2T(ref->pts, reflink->time_base);
#if FF_API_FRAME_PKT
FF_DISABLE_DEPRECATION_WARNINGS
scale->var_values[VAR_REF_POS] = ref->pkt_pos == -1 ? NAN : ref->pkt_pos;
FF_ENABLE_DEPRECATION_WARNINGS
#endif
}
}
ret = scale_frame(ctx->inputs[0], &in, &out);
if (ret < 0)
goto err;
av_assert0(out);
out->pts = av_rescale_q(fs->pts, fs->time_base, outlink->time_base);
return ff_filter_frame(outlink, out);
err:
av_frame_free(&in);
return ret;
}
static int filter_frame(AVFilterLink *link, AVFrame *in)
{
AVFilterContext *ctx = link->dst;
AVFilterLink *outlink = ctx->outputs[0];
AVFrame *out;
int ret;
ret = scale_frame(link, &in, &out);
if (out)
return ff_filter_frame(outlink, out);
return ret;
}
static int filter_frame_ref(AVFilterLink *link, AVFrame *in)
{
FilterLink *l = ff_filter_link(link);
ScaleContext *scale = link->dst->priv;
AVFilterLink *outlink = link->dst->outputs[1];
int frame_changed;
frame_changed = in->width != link->w ||
in->height != link->h ||
in->format != link->format ||
in->sample_aspect_ratio.den != link->sample_aspect_ratio.den ||
in->sample_aspect_ratio.num != link->sample_aspect_ratio.num ||
in->colorspace != link->colorspace ||
in->color_range != link->color_range;
if (frame_changed) {
link->format = in->format;
link->w = in->width;
link->h = in->height;
link->sample_aspect_ratio.num = in->sample_aspect_ratio.num;
link->sample_aspect_ratio.den = in->sample_aspect_ratio.den;
link->colorspace = in->colorspace;
link->color_range = in->color_range;
config_props_ref(outlink);
}
if (scale->eval_mode == EVAL_MODE_FRAME) {
scale->var_values[VAR_N] = l->frame_count_out;
scale->var_values[VAR_T] = TS2T(in->pts, link->time_base);
#if FF_API_FRAME_PKT
FF_DISABLE_DEPRECATION_WARNINGS
scale->var_values[VAR_POS] = in->pkt_pos == -1 ? NAN : in->pkt_pos;
FF_ENABLE_DEPRECATION_WARNINGS
#endif
}
return ff_filter_frame(outlink, in);
}
static int process_command(AVFilterContext *ctx, const char *cmd, const char *args,
char *res, int res_len, int flags)
{
ScaleContext *scale = ctx->priv;
char *str_expr;
AVExpr **pexpr_ptr;
int ret, w, h;
w = !strcmp(cmd, "width") || !strcmp(cmd, "w");
h = !strcmp(cmd, "height") || !strcmp(cmd, "h");
if (w || h) {
str_expr = w ? scale->w_expr : scale->h_expr;
pexpr_ptr = w ? &scale->w_pexpr : &scale->h_pexpr;
ret = scale_parse_expr(ctx, str_expr, pexpr_ptr, cmd, args);
} else
ret = AVERROR(ENOSYS);
if (ret < 0)
av_log(ctx, AV_LOG_ERROR, "Failed to process command. Continuing with existing parameters.\n");
return ret;
}
static int activate(AVFilterContext *ctx)
{
ScaleContext *scale = ctx->priv;
return ff_framesync_activate(&scale->fs);
}
static const AVClass *child_class_iterate(void **iter)
{
switch ((uintptr_t) *iter) {
case 0:
*iter = (void*)(uintptr_t) 1;
return sws_get_class();
case 1:
*iter = (void*)(uintptr_t) 2;
return &ff_framesync_class;
}
return NULL;
}
static void *child_next(void *obj, void *prev)
{
ScaleContext *s = obj;
if (!prev)
return s->sws_opts;
if (prev == s->sws_opts)
return &s->fs;
return NULL;
}
#define OFFSET(x) offsetof(ScaleContext, x)
#define FLAGS AV_OPT_FLAG_VIDEO_PARAM|AV_OPT_FLAG_FILTERING_PARAM
#define TFLAGS AV_OPT_FLAG_VIDEO_PARAM|AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_RUNTIME_PARAM
static const AVOption scale_options[] = {
{ "w", "Output video width", OFFSET(w_expr), AV_OPT_TYPE_STRING, .flags = TFLAGS },
{ "width", "Output video width", OFFSET(w_expr), AV_OPT_TYPE_STRING, .flags = TFLAGS },
{ "h", "Output video height", OFFSET(h_expr), AV_OPT_TYPE_STRING, .flags = TFLAGS },
{ "height","Output video height", OFFSET(h_expr), AV_OPT_TYPE_STRING, .flags = TFLAGS },
{ "flags", "Flags to pass to libswscale", OFFSET(flags_str), AV_OPT_TYPE_STRING, { .str = "" }, .flags = FLAGS },
{ "interl", "set interlacing", OFFSET(interlaced), AV_OPT_TYPE_BOOL, {.i64 = 0 }, -1, 1, FLAGS },
{ "size", "set video size", OFFSET(size_str), AV_OPT_TYPE_STRING, {.str = NULL}, 0, .flags = FLAGS },
{ "s", "set video size", OFFSET(size_str), AV_OPT_TYPE_STRING, {.str = NULL}, 0, .flags = FLAGS },
{ "in_color_matrix", "set input YCbCr type", OFFSET(in_color_matrix), AV_OPT_TYPE_INT, { .i64 = -1 }, -1, AVCOL_SPC_NB-1, .flags = FLAGS, .unit = "color" },
{ "out_color_matrix", "set output YCbCr type", OFFSET(out_color_matrix), AV_OPT_TYPE_INT, { .i64 = AVCOL_SPC_UNSPECIFIED }, 0, AVCOL_SPC_NB-1, .flags = FLAGS, .unit = "color"},
{ "auto", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = -1 }, 0, 0, FLAGS, .unit = "color" },
{ "bt601", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = AVCOL_SPC_BT470BG }, 0, 0, FLAGS, .unit = "color" },
{ "bt470", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = AVCOL_SPC_BT470BG }, 0, 0, FLAGS, .unit = "color" },
{ "smpte170m", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = AVCOL_SPC_BT470BG }, 0, 0, FLAGS, .unit = "color" },
{ "bt709", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = AVCOL_SPC_BT709 }, 0, 0, FLAGS, .unit = "color" },
{ "fcc", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = AVCOL_SPC_FCC }, 0, 0, FLAGS, .unit = "color" },
{ "smpte240m", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = AVCOL_SPC_SMPTE240M }, 0, 0, FLAGS, .unit = "color" },
{ "bt2020", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = AVCOL_SPC_BT2020_NCL }, 0, 0, FLAGS, .unit = "color" },
{ "in_range", "set input color range", OFFSET( in_range), AV_OPT_TYPE_INT, {.i64 = AVCOL_RANGE_UNSPECIFIED }, 0, 2, FLAGS, .unit = "range" },
{ "out_range", "set output color range", OFFSET(out_range), AV_OPT_TYPE_INT, {.i64 = AVCOL_RANGE_UNSPECIFIED }, 0, 2, FLAGS, .unit = "range" },
{ "auto", NULL, 0, AV_OPT_TYPE_CONST, {.i64 = AVCOL_RANGE_UNSPECIFIED }, 0, 0, FLAGS, .unit = "range" },
{ "unknown", NULL, 0, AV_OPT_TYPE_CONST, {.i64 = AVCOL_RANGE_UNSPECIFIED }, 0, 0, FLAGS, .unit = "range" },
{ "full", NULL, 0, AV_OPT_TYPE_CONST, {.i64 = AVCOL_RANGE_JPEG}, 0, 0, FLAGS, .unit = "range" },
{ "limited",NULL, 0, AV_OPT_TYPE_CONST, {.i64 = AVCOL_RANGE_MPEG}, 0, 0, FLAGS, .unit = "range" },
{ "jpeg", NULL, 0, AV_OPT_TYPE_CONST, {.i64 = AVCOL_RANGE_JPEG}, 0, 0, FLAGS, .unit = "range" },
{ "mpeg", NULL, 0, AV_OPT_TYPE_CONST, {.i64 = AVCOL_RANGE_MPEG}, 0, 0, FLAGS, .unit = "range" },
{ "tv", NULL, 0, AV_OPT_TYPE_CONST, {.i64 = AVCOL_RANGE_MPEG}, 0, 0, FLAGS, .unit = "range" },
{ "pc", NULL, 0, AV_OPT_TYPE_CONST, {.i64 = AVCOL_RANGE_JPEG}, 0, 0, FLAGS, .unit = "range" },
{ "in_v_chr_pos", "input vertical chroma position in luma grid/256" , OFFSET(in_v_chr_pos), AV_OPT_TYPE_INT, { .i64 = -513}, -513, 512, FLAGS },
{ "in_h_chr_pos", "input horizontal chroma position in luma grid/256", OFFSET(in_h_chr_pos), AV_OPT_TYPE_INT, { .i64 = -513}, -513, 512, FLAGS },
{ "out_v_chr_pos", "output vertical chroma position in luma grid/256" , OFFSET(out_v_chr_pos), AV_OPT_TYPE_INT, { .i64 = -513}, -513, 512, FLAGS },
{ "out_h_chr_pos", "output horizontal chroma position in luma grid/256", OFFSET(out_h_chr_pos), AV_OPT_TYPE_INT, { .i64 = -513}, -513, 512, FLAGS },
{ "force_original_aspect_ratio", "decrease or increase w/h if necessary to keep the original AR", OFFSET(force_original_aspect_ratio), AV_OPT_TYPE_INT, { .i64 = 0}, 0, 2, FLAGS, .unit = "force_oar" },
{ "disable", NULL, 0, AV_OPT_TYPE_CONST, {.i64 = 0 }, 0, 0, FLAGS, .unit = "force_oar" },
{ "decrease", NULL, 0, AV_OPT_TYPE_CONST, {.i64 = 1 }, 0, 0, FLAGS, .unit = "force_oar" },
{ "increase", NULL, 0, AV_OPT_TYPE_CONST, {.i64 = 2 }, 0, 0, FLAGS, .unit = "force_oar" },
{ "force_divisible_by", "enforce that the output resolution is divisible by a defined integer when force_original_aspect_ratio is used", OFFSET(force_divisible_by), AV_OPT_TYPE_INT, { .i64 = 1}, 1, 256, FLAGS },
{ "param0", "Scaler param 0", OFFSET(param[0]), AV_OPT_TYPE_DOUBLE, { .dbl = DBL_MAX }, -DBL_MAX, DBL_MAX, FLAGS },
{ "param1", "Scaler param 1", OFFSET(param[1]), AV_OPT_TYPE_DOUBLE, { .dbl = DBL_MAX }, -DBL_MAX, DBL_MAX, FLAGS },
{ "eval", "specify when to evaluate expressions", OFFSET(eval_mode), AV_OPT_TYPE_INT, {.i64 = EVAL_MODE_INIT}, 0, EVAL_MODE_NB-1, FLAGS, .unit = "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 }
};
static const AVClass scale_class = {
.class_name = "scale",
.item_name = av_default_item_name,
.option = scale_options,
.version = LIBAVUTIL_VERSION_INT,
.category = AV_CLASS_CATEGORY_FILTER,
.child_class_iterate = child_class_iterate,
.child_next = child_next,
};
static const AVFilterPad avfilter_vf_scale_inputs[] = {
{
.name = "default",
.type = AVMEDIA_TYPE_VIDEO,
},
};
static const AVFilterPad avfilter_vf_scale_outputs[] = {
{
.name = "default",
.type = AVMEDIA_TYPE_VIDEO,
.config_props = config_props,
},
};
const AVFilter ff_vf_scale = {
.name = "scale",
.description = NULL_IF_CONFIG_SMALL("Scale the input video size and/or convert the image format."),
.preinit = preinit,
.init = init,
.uninit = uninit,
.priv_size = sizeof(ScaleContext),
.priv_class = &scale_class,
FILTER_INPUTS(avfilter_vf_scale_inputs),
FILTER_OUTPUTS(avfilter_vf_scale_outputs),
FILTER_QUERY_FUNC(query_formats),
.activate = activate,
.process_command = process_command,
.flags = AVFILTER_FLAG_DYNAMIC_INPUTS,
};
static const AVClass *scale2ref_child_class_iterate(void **iter)
{
const AVClass *c = *iter ? NULL : sws_get_class();
*iter = (void*)(uintptr_t)c;
return c;
}
static void *scale2ref_child_next(void *obj, void *prev)
{
ScaleContext *s = obj;
if (!prev)
return s->sws_opts;
return NULL;
}
static const AVClass scale2ref_class = {
.class_name = "scale(2ref)",
.item_name = av_default_item_name,
.option = scale_options,
.version = LIBAVUTIL_VERSION_INT,
.category = AV_CLASS_CATEGORY_FILTER,
.child_class_iterate = scale2ref_child_class_iterate,
.child_next = scale2ref_child_next,
};
static const AVFilterPad avfilter_vf_scale2ref_inputs[] = {
{
.name = "default",
.type = AVMEDIA_TYPE_VIDEO,
.filter_frame = filter_frame,
},
{
.name = "ref",
.type = AVMEDIA_TYPE_VIDEO,
.filter_frame = filter_frame_ref,
},
};
static const AVFilterPad avfilter_vf_scale2ref_outputs[] = {
{
.name = "default",
.type = AVMEDIA_TYPE_VIDEO,
.config_props = config_props,
.request_frame= request_frame,
},
{
.name = "ref",
.type = AVMEDIA_TYPE_VIDEO,
.config_props = config_props_ref,
.request_frame= request_frame_ref,
},
};
const AVFilter ff_vf_scale2ref = {
.name = "scale2ref",
.description = NULL_IF_CONFIG_SMALL("Scale the input video size and/or convert the image format to the given reference."),
.preinit = preinit,
.init = init,
.uninit = uninit,
.priv_size = sizeof(ScaleContext),
.priv_class = &scale2ref_class,
FILTER_INPUTS(avfilter_vf_scale2ref_inputs),
FILTER_OUTPUTS(avfilter_vf_scale2ref_outputs),
FILTER_QUERY_FUNC(query_formats),
.process_command = process_command,
};