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/*
* This file is part of mpv.
*
* mpv 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.
*
* mpv 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 mpv. If not, see <http://www.gnu.org/licenses/>.
*/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <math.h>
#include <inttypes.h>
#include <stdarg.h>
#include <assert.h>
#include <libswscale/swscale.h>
#include "common/av_common.h"
#include "common/msg.h"
#include "options/options.h"
#include "video/img_format.h"
#include "video/mp_image.h"
#include "video/mp_image_pool.h"
#include "video/sws_utils.h"
#include "video/fmt-conversion.h"
#include "f_swscale.h"
#include "filter.h"
#include "filter_internal.h"
int mp_sws_find_best_out_format(int in_format, int *out_formats,
int num_out_formats)
{
if (sws_isSupportedInput(imgfmt2pixfmt(in_format)) < 1)
return 0;
int best = 0;
for (int n = 0; n < num_out_formats; n++) {
int out_format = out_formats[n];
if (sws_isSupportedOutput(imgfmt2pixfmt(out_format)) < 1)
continue;
if (best) {
int candidate = mp_imgfmt_select_best(best, out_format, in_format);
if (candidate)
best = candidate;
} else {
best = out_format;
}
}
return best;
}
bool mp_sws_supports_input(int imgfmt)
{
return sws_isSupportedInput(imgfmt2pixfmt(imgfmt));
}
static void process(struct mp_filter *f)
{
struct mp_sws_filter *s = f->priv;
if (!mp_pin_can_transfer_data(f->ppins[1], f->ppins[0]))
return;
struct mp_frame frame = mp_pin_out_read(f->ppins[0]);
if (mp_frame_is_signaling(frame)) {
mp_pin_in_write(f->ppins[1], frame);
return;
}
if (frame.type != MP_FRAME_VIDEO) {
MP_ERR(f, "video frame expected\n");
goto error;
}
struct mp_image *src = frame.data;
int dstfmt = s->out_format ? s->out_format : src->imgfmt;
struct mp_image *dst = mp_image_pool_get(s->pool, dstfmt, src->w, src->h);
if (!dst)
goto error;
mp_image_copy_attributes(dst, src);
// If we convert from RGB to YUV, default to limited range.
if (mp_imgfmt_get_forced_csp(src->imgfmt) == MP_CSP_RGB &&
mp_imgfmt_get_forced_csp(dst->imgfmt) == MP_CSP_AUTO)
{
dst->params.color.levels = MP_CSP_LEVELS_TV;
}
mp_image_params_guess_csp(&dst->params);
bool ok = mp_sws_scale(s->sws, dst, src) >= 0;
mp_frame_unref(&frame);
frame = (struct mp_frame){MP_FRAME_VIDEO, dst};
if (!ok)
goto error;
mp_pin_in_write(f->ppins[1], frame);
return;
error:
mp_frame_unref(&frame);
mp_filter_internal_mark_failed(f);
return;
}
static const struct mp_filter_info sws_filter = {
.name = "swscale",
.priv_size = sizeof(struct mp_sws_filter),
.process = process,
};
struct mp_sws_filter *mp_sws_filter_create(struct mp_filter *parent)
{
struct mp_filter *f = mp_filter_create(parent, &sws_filter);
if (!f)
return NULL;
mp_filter_add_pin(f, MP_PIN_IN, "in");
mp_filter_add_pin(f, MP_PIN_OUT, "out");
struct mp_sws_filter *s = f->priv;
s->f = f;
s->sws = mp_sws_alloc(s);
s->sws->log = f->log;
s->pool = mp_image_pool_new(s);
mp_sws_set_from_cmdline(s->sws, f->global);
return s;
}
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