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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 <stddef.h>
#include <stdbool.h>
#include <inttypes.h>
#include <math.h>
#include <assert.h>
#include "config.h"
#include "talloc.h"
#include "common/msg.h"
#include "options/options.h"
#include "common/common.h"
#include "common/global.h"
#include "stream/stream.h"
#include "sub/dec_sub.h"
#include "demux/demux.h"
#include "video/mp_image.h"
#include "video/decode/dec_video.h"
#include "video/filter/vf.h"
#include "core.h"
static void reset_subtitles(struct MPContext *mpctx, int order)
{
if (mpctx->d_sub[order])
sub_reset(mpctx->d_sub[order]);
term_osd_set_subs(mpctx, NULL);
}
void reset_subtitle_state(struct MPContext *mpctx)
{
reset_subtitles(mpctx, 0);
reset_subtitles(mpctx, 1);
}
void uninit_sub(struct MPContext *mpctx, int order)
{
if (mpctx->d_sub[order]) {
reset_subtitles(mpctx, order);
sub_select(mpctx->d_sub[order], false);
mpctx->d_sub[order] = NULL; // not destroyed
osd_set_sub(mpctx->osd, OSDTYPE_SUB + order, NULL);
reselect_demux_streams(mpctx);
}
}
void uninit_sub_all(struct MPContext *mpctx)
{
uninit_sub(mpctx, 0);
uninit_sub(mpctx, 1);
}
// When reading subtitles from a demuxer, and we read video or audio from the
// demuxer, we should not explicitly read subtitle packets. (With external
// subs, we have to.)
static bool is_interleaved(struct MPContext *mpctx, struct track *track)
{
if (track->is_external || !track->demuxer)
return false;
struct demuxer *demuxer = track->demuxer;
for (int t = 0; t < mpctx->num_tracks; t++) {
struct track *other = mpctx->tracks[t];
if (other != track && other->selected && other->demuxer == demuxer &&
(other->type == STREAM_VIDEO || other->type == STREAM_AUDIO))
return true;
}
return track->demuxer == mpctx->demuxer;
}
static void update_subtitle(struct MPContext *mpctx, int order)
{
struct MPOpts *opts = mpctx->opts;
struct track *track = mpctx->current_track[order][STREAM_SUB];
struct dec_sub *dec_sub = mpctx->d_sub[order];
if (!track || !dec_sub)
return;
if (mpctx->d_video) {
struct mp_image_params params = mpctx->d_video->vfilter->override_params;
if (params.imgfmt)
sub_control(dec_sub, SD_CTRL_SET_VIDEO_PARAMS, ¶ms);
}
double refpts_s = mpctx->playback_pts;
double curpts_s = refpts_s - opts->sub_delay;
if (!track->preloaded && track->stream) {
struct sh_stream *sh_stream = track->stream;
bool interleaved = is_interleaved(mpctx, track);
while (1) {
if (interleaved && !demux_has_packet(sh_stream))
break;
double subpts_s = demux_get_next_pts(sh_stream);
if (!demux_has_packet(sh_stream))
break;
if (subpts_s > curpts_s) {
MP_DBG(mpctx, "Sub early: c_pts=%5.3f s_pts=%5.3f\n",
curpts_s, subpts_s);
// Often subs can be handled in advance
if (!sub_accepts_packet_in_advance(dec_sub))
break;
// Try to avoid demuxing whole file at once
if (subpts_s > curpts_s + 1 && !interleaved)
break;
}
struct demux_packet *pkt = demux_read_packet(sh_stream);
MP_DBG(mpctx, "Sub: c_pts=%5.3f s_pts=%5.3f duration=%5.3f len=%d\n",
curpts_s, pkt->pts, pkt->duration, pkt->len);
sub_decode(dec_sub, pkt);
talloc_free(pkt);
}
}
// Handle displaying subtitles on terminal; never done for secondary subs
if (order == 0 && !mpctx->video_out)
term_osd_set_subs(mpctx, sub_get_text(dec_sub, curpts_s));
}
void update_subtitles(struct MPContext *mpctx)
{
update_subtitle(mpctx, 0);
update_subtitle(mpctx, 1);
}
static void reinit_subdec(struct MPContext *mpctx, struct track *track)
{
struct MPOpts *opts = mpctx->opts;
struct dec_sub *dec_sub = track->dec_sub;
if (sub_is_initialized(dec_sub))
return;
sub_init(dec_sub, track->demuxer, track->stream);
struct sh_video *sh_video =
mpctx->d_video ? mpctx->d_video->header->video : NULL;
double fps = sh_video ? sh_video->fps : 25;
sub_control(dec_sub, SD_CTRL_SET_VIDEO_DEF_FPS, &fps);
// Don't do this if the file has video/audio streams. Don't do it even
// if it has only sub streams, because reading packets will change the
// demuxer position.
if (!track->preloaded && track->is_external && !opts->sub_clear_on_seek) {
demux_seek(track->demuxer, 0, SEEK_ABSOLUTE);
track->preloaded = sub_read_all_packets(dec_sub, track->stream);
if (track->preloaded)
demux_stop_thread(track->demuxer);
}
}
void reinit_subs(struct MPContext *mpctx, int order)
{
struct track *track = mpctx->current_track[order][STREAM_SUB];
assert(!mpctx->d_sub[order]);
struct sh_stream *sh = track ? track->stream : NULL;
if (!sh)
return;
if (!track->dec_sub)
track->dec_sub = sub_create(mpctx->global);
mpctx->d_sub[order] = track->dec_sub;
sub_select(track->dec_sub, true);
reinit_subdec(mpctx, track);
osd_set_sub(mpctx->osd, OSDTYPE_SUB + order, track->dec_sub);
sub_control(track->dec_sub, SD_CTRL_SET_TOP, &(bool){!!order});
}
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