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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 General Public License as published by
* the Free Software Foundation; either version 2 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with mpv. If not, see <http://www.gnu.org/licenses/>.
*/
#include <stdlib.h>
#include <assert.h>
#include "talloc.h"
#include "mpvcore/options.h"
#include "demux/stheader.h"
#include "video/mp_image.h"
#include "sd.h"
#include "sub.h"
#include "spudec.h"
struct sd_spu_priv {
void *spudec;
struct mp_image_params video_params;
};
static bool is_dvd_sub(const char *t)
{
return t && (strcmp(t, "dvd_subtitle") == 0 ||
strcmp(t, "dvd_subtitle_mpg") == 0);
}
static bool supports_format(const char *format)
{
return is_dvd_sub(format);
}
static int init(struct sd *sd)
{
void *spudec = spudec_new_scaled(sd->sub_video_w, sd->sub_video_h,
sd->extradata, sd->extradata_len);
if (!spudec)
return -1;
struct sd_spu_priv *priv = talloc_zero(NULL, struct sd_spu_priv);
priv->spudec = spudec;
sd->priv = priv;
return 0;
}
static void decode(struct sd *sd, struct demux_packet *packet)
{
struct sd_spu_priv *priv = sd->priv;
if (packet->pts < 0 || packet->len == 0)
return;
spudec_assemble(priv->spudec, packet->buffer, packet->len,
packet->pts * 90000);
}
static void get_bitmaps(struct sd *sd, struct mp_osd_res d, double pts,
struct sub_bitmaps *res)
{
struct MPOpts *opts = sd->opts;
struct sd_spu_priv *priv = sd->priv;
spudec_set_forced_subs_only(priv->spudec, opts->forced_subs_only);
spudec_heartbeat(priv->spudec, pts * 90000);
if (spudec_visible(priv->spudec)) {
double xscale = 1;
double yscale = 1;
if (opts->stretch_dvd_subs) {
// For DVD subs, try to keep the subtitle PAR at display PAR.
double video_par =
(priv->video_params.d_w / (double)priv->video_params.d_h)
/ (priv->video_params.w / (double)priv->video_params.h);
if (video_par > 1.0) {
xscale /= video_par;
} else {
yscale *= video_par;
}
}
spudec_get_indexed(priv->spudec, &d, xscale, yscale, res);
}
}
static void reset(struct sd *sd)
{
struct sd_spu_priv *priv = sd->priv;
spudec_reset(priv->spudec);
}
static void uninit(struct sd *sd)
{
struct sd_spu_priv *priv = sd->priv;
spudec_free(priv->spudec);
talloc_free(priv);
}
static int control(struct sd *sd, enum sd_ctrl cmd, void *arg)
{
struct sd_spu_priv *priv = sd->priv;
switch (cmd) {
case SD_CTRL_SET_VIDEO_PARAMS:
priv->video_params = *(struct mp_image_params *)arg;
return CONTROL_OK;
default:
return CONTROL_UNKNOWN;
}
}
const struct sd_functions sd_spu = {
.name = "spu",
.supports_format = supports_format,
.init = init,
.decode = decode,
.get_bitmaps = get_bitmaps,
.control = control,
.reset = reset,
.uninit = uninit,
};
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