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vf_scale: use colorspace negotiation API 

This filter will always accept any input format, even if the user sets
a specific in_range/in_color_matrix. This is to preserve status quo with
current behavior, where passing a specific in_color_matrix merely
overrides the incoming frames' attributes. (Use `vf_format` to force
a specific input range)

Because changing colorspace and color_range now requires reconfiguring
the link, we can lift sws_setColorspaceDetails out of scale_frame and
into config_props. (This will also get re-called if the input frame
properties change)
This commit is contained in:
Niklas Haas 2023-10-31 13:52:53 +01:00
parent 9613ba95c1
commit 45e09a3041
1 changed files with 103 additions and 85 deletions
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188
libavfilter/vf_scale.c
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@ -143,7 +143,6 @@ typedef struct ScaleContext {
int out_color_matrix;
int in_range;
int in_frame_range;
int out_range;
int out_h_chr_pos;
@ -292,6 +291,18 @@ static av_cold int preinit(AVFilterContext *ctx)
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 av_cold int init(AVFilterContext *ctx)
{
ScaleContext *scale = ctx->priv;
@ -332,6 +343,19 @@ static av_cold int init(AVFilterContext *ctx)
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);
@ -356,8 +380,6 @@ static av_cold int init(AVFilterContext *ctx)
if (!threads)
av_opt_set_int(scale->sws_opts, "threads", ff_filter_get_nb_threads(ctx), 0);
scale->in_frame_range = AVCOL_RANGE_UNSPECIFIED;
return 0;
}
@ -376,6 +398,7 @@ static av_cold void uninit(AVFilterContext *ctx)
static int query_formats(AVFilterContext *ctx)
{
ScaleContext *scale = ctx->priv;
AVFilterFormats *formats;
const AVPixFmtDescriptor *desc;
enum AVPixelFormat pix_fmt;
@ -407,6 +430,28 @@ static int query_formats(AVFilterContext *ctx)
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;
}
@ -497,6 +542,7 @@ static int config_props(AVFilterLink *outlink)
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)
@ -521,6 +567,14 @@ static int config_props(AVFilterLink *outlink)
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])
@ -530,8 +584,8 @@ static int config_props(AVFilterLink *outlink)
scale->isws[0] = scale->isws[1] = scale->sws = NULL;
if (inlink0->w == outlink->w &&
inlink0->h == outlink->h &&
scale->out_color_matrix == AVCOL_SPC_UNSPECIFIED &&
scale->in_range == scale->out_range &&
in_range == outlink->color_range &&
in_colorspace == outlink->colorspace &&
inlink0->format == outlink->format)
;
else {
@ -540,6 +594,8 @@ static int config_props(AVFilterLink *outlink)
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);
@ -555,15 +611,12 @@ static int config_props(AVFilterLink *outlink)
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 (scale->in_range != AVCOL_RANGE_UNSPECIFIED)
if (in_range != AVCOL_RANGE_UNSPECIFIED)
av_opt_set_int(s, "src_range",
scale->in_range == AVCOL_RANGE_JPEG, 0);
else if (scale->in_frame_range != AVCOL_RANGE_UNSPECIFIED)
av_opt_set_int(s, "src_range",
scale->in_frame_range == AVCOL_RANGE_JPEG, 0);
if (scale->out_range != AVCOL_RANGE_UNSPECIFIED)
in_range == AVCOL_RANGE_JPEG, 0);
if (outlink->color_range != AVCOL_RANGE_UNSPECIFIED)
av_opt_set_int(s, "dst_range",
scale->out_range == AVCOL_RANGE_JPEG, 0);
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.
@ -584,6 +637,24 @@ static int config_props(AVFilterLink *outlink)
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;
}
@ -597,10 +668,12 @@ static int config_props(AVFilterLink *outlink)
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 sar:%d/%d -> w:%d h:%d fmt:%s sar:%d/%d flags:%s\n",
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);
@ -620,6 +693,8 @@ static int config_props_ref(AVFilterLink *outlink)
outlink->sample_aspect_ratio = inlink->sample_aspect_ratio;
outlink->time_base = inlink->time_base;
outlink->frame_rate = inlink->frame_rate;
outlink->colorspace = inlink->colorspace;
outlink->color_range = inlink->color_range;
return 0;
}
@ -693,7 +768,6 @@ static int scale_frame(AVFilterLink *link, AVFrame *in, AVFrame **frame_out)
const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(link->format);
char buf[32];
int ret;
int in_range;
int frame_changed;
*frame_out = NULL;
@ -704,14 +778,9 @@ static int scale_frame(AVFilterLink *link, AVFrame *in, AVFrame **frame_out)
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;
if (in->color_range != AVCOL_RANGE_UNSPECIFIED &&
scale->in_range == AVCOL_RANGE_UNSPECIFIED &&
in->color_range != scale->in_frame_range) {
scale->in_frame_range = in->color_range;
frame_changed = 1;
}
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 };
@ -768,9 +837,11 @@ 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]->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;
@ -798,69 +869,12 @@ scale:
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);
in_range = in->color_range;
if ( scale->in_color_matrix != AVCOL_SPC_UNSPECIFIED
|| scale->out_color_matrix != AVCOL_SPC_UNSPECIFIED
|| scale-> in_range != AVCOL_RANGE_UNSPECIFIED
|| in_range != AVCOL_RANGE_UNSPECIFIED
|| scale->out_range != AVCOL_RANGE_UNSPECIFIED) {
int in_full, out_full, brightness, contrast, saturation;
const int *inv_table, *table;
sws_getColorspaceDetails(scale->sws, (int **)&inv_table, &in_full,
(int **)&table, &out_full,
&brightness, &contrast, &saturation);
if (scale->in_color_matrix == -1 /* auto */)
inv_table = sws_getCoefficients(in->colorspace);
else if (scale->in_color_matrix != AVCOL_SPC_UNSPECIFIED)
inv_table = sws_getCoefficients(scale->in_color_matrix);
if (scale->out_color_matrix != AVCOL_SPC_UNSPECIFIED)
table = sws_getCoefficients(scale->out_color_matrix);
else if (scale->in_color_matrix != AVCOL_SPC_UNSPECIFIED)
table = inv_table;
if (scale-> in_range != AVCOL_RANGE_UNSPECIFIED)
in_full = (scale-> in_range == AVCOL_RANGE_JPEG);
else if (in_range != AVCOL_RANGE_UNSPECIFIED)
in_full = (in_range == AVCOL_RANGE_JPEG);
if (scale->out_range != AVCOL_RANGE_UNSPECIFIED)
out_full = (scale->out_range == AVCOL_RANGE_JPEG);
sws_setColorspaceDetails(scale->sws, inv_table, in_full,
table, out_full,
brightness, contrast, saturation);
if (scale->isws[0])
sws_setColorspaceDetails(scale->isws[0], inv_table, in_full,
table, out_full,
brightness, contrast, saturation);
if (scale->isws[1])
sws_setColorspaceDetails(scale->isws[1], inv_table, in_full,
table, out_full,
brightness, contrast, saturation);
out->color_range = out_full ? AVCOL_RANGE_JPEG : AVCOL_RANGE_MPEG;
if (scale->out_color_matrix != AVCOL_SPC_UNSPECIFIED)
out->colorspace = scale->out_color_matrix;
}
// Sanity checks:
// 1. If the output is RGB, set the matrix coefficients to RGB.
// 2. If the output is not RGB and we've got the RGB/XYZ (identity)
// matrix configured, unset the matrix.
// In theory these should be in swscale itself as the AVFrame
// based API gets in, so that not every swscale API user has
// to go through duplicating such sanity checks.
if (av_pix_fmt_desc_get(out->format)->flags & AV_PIX_FMT_FLAG_RGB)
out->colorspace = AVCOL_SPC_RGB;
else if (out->colorspace == AVCOL_SPC_RGB)
out->colorspace = AVCOL_SPC_UNSPECIFIED;
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,
@ -905,7 +919,9 @@ static int filter_frame_ref(AVFilterLink *link, AVFrame *in)
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->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;
@ -913,6 +929,8 @@ static int filter_frame_ref(AVFilterLink *link, AVFrame *in)
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);
}