mirror of
https://github.com/mpv-player/mpv
synced 2024-12-22 23:02:37 +00:00
633fde4ae5
We found that the stretching - although it usually improves the looks of the fonts - is incorrect. On DVD, subtitles can cover the full area of the picture, and they have the same pixel aspect as the movie itself. Too bad many commercially released DVDs use bitmap fonts made with the wrong pixel aspect (i.e. assuming 1:1) - --stretch-dvd-subs will make these more pretty then.
132 lines
3.4 KiB
C
132 lines
3.4 KiB
C
/*
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* This file is part of mpv.
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*
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* mpv is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* mpv is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with mpv. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include <stdlib.h>
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#include <assert.h>
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#include "talloc.h"
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#include "mpvcore/options.h"
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#include "demux/stheader.h"
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#include "video/mp_image.h"
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#include "sd.h"
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#include "sub.h"
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#include "spudec.h"
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struct sd_spu_priv {
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void *spudec;
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struct mp_image_params video_params;
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};
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static bool is_dvd_sub(const char *t)
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{
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return t && (strcmp(t, "dvd_subtitle") == 0 ||
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strcmp(t, "dvd_subtitle_mpg") == 0);
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}
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static bool supports_format(const char *format)
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{
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return is_dvd_sub(format);
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}
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static int init(struct sd *sd)
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{
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void *spudec = spudec_new_scaled(sd->sub_video_w, sd->sub_video_h,
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sd->extradata, sd->extradata_len);
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if (!spudec)
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return -1;
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struct sd_spu_priv *priv = talloc_zero(NULL, struct sd_spu_priv);
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priv->spudec = spudec;
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sd->priv = priv;
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return 0;
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}
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static void decode(struct sd *sd, struct demux_packet *packet)
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{
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struct sd_spu_priv *priv = sd->priv;
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if (packet->pts < 0 || packet->len == 0)
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return;
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spudec_assemble(priv->spudec, packet->buffer, packet->len,
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packet->pts * 90000);
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}
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static void get_bitmaps(struct sd *sd, struct mp_osd_res d, double pts,
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struct sub_bitmaps *res)
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{
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struct MPOpts *opts = sd->opts;
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struct sd_spu_priv *priv = sd->priv;
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spudec_set_forced_subs_only(priv->spudec, opts->forced_subs_only);
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spudec_heartbeat(priv->spudec, pts * 90000);
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if (spudec_visible(priv->spudec)) {
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double xscale = 1;
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double yscale = 1;
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if (opts->stretch_dvd_subs) {
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// For DVD subs, try to keep the subtitle PAR at display PAR.
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double video_par =
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(priv->video_params.d_w / (double)priv->video_params.d_h)
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/ (priv->video_params.w / (double)priv->video_params.h);
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if (video_par > 1.0) {
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xscale /= video_par;
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} else {
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yscale *= video_par;
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}
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}
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spudec_get_indexed(priv->spudec, &d, xscale, yscale, res);
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}
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}
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static void reset(struct sd *sd)
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{
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struct sd_spu_priv *priv = sd->priv;
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spudec_reset(priv->spudec);
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}
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static void uninit(struct sd *sd)
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{
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struct sd_spu_priv *priv = sd->priv;
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spudec_free(priv->spudec);
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talloc_free(priv);
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}
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static int control(struct sd *sd, enum sd_ctrl cmd, void *arg)
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{
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struct sd_spu_priv *priv = sd->priv;
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switch (cmd) {
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case SD_CTRL_SET_VIDEO_PARAMS:
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priv->video_params = *(struct mp_image_params *)arg;
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return CONTROL_OK;
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default:
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return CONTROL_UNKNOWN;
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}
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}
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const struct sd_functions sd_spu = {
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.name = "spu",
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.supports_format = supports_format,
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.init = init,
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.decode = decode,
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.get_bitmaps = get_bitmaps,
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.control = control,
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.reset = reset,
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.uninit = uninit,
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};
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