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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 <stddef.h>
#include <stdbool.h>
#include <inttypes.h>
#include <math.h>
#include <assert.h>
#include "config.h"
#include "mpv_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 "core.h"
// 0: primary sub, 1: secondary sub, -1: not selected
static int get_order(struct MPContext *mpctx, struct track *track)
{
for (int n = 0; n < NUM_PTRACKS; n++) {
if (mpctx->current_track[n][STREAM_SUB] == track)
return n;
}
return -1;
}
static void reset_subtitles(struct MPContext *mpctx, struct track *track)
{
if (track->d_sub)
sub_reset(track->d_sub);
term_osd_set_subs(mpctx, NULL);
}
void reset_subtitle_state(struct MPContext *mpctx)
{
for (int n = 0; n < mpctx->num_tracks; n++) {
struct dec_sub *d_sub = mpctx->tracks[n]->d_sub;
if (d_sub)
sub_reset(d_sub);
}
term_osd_set_subs(mpctx, NULL);
}
void uninit_sub(struct MPContext *mpctx, struct track *track)
{
if (track && track->d_sub) {
reset_subtitles(mpctx, track);
sub_select(track->d_sub, false);
int order = get_order(mpctx, track);
osd_set_sub(mpctx->osd, order, NULL);
}
}
void uninit_sub_all(struct MPContext *mpctx)
{
for (int n = 0; n < mpctx->num_tracks; n++)
uninit_sub(mpctx, mpctx->tracks[n]);
}
static bool update_subtitle(struct MPContext *mpctx, double video_pts,
struct track *track)
{
struct dec_sub *dec_sub = track ? track->d_sub : NULL;
if (!dec_sub || video_pts == MP_NOPTS_VALUE)
return true;
if (mpctx->vo_chain) {
struct mp_image_params params = mpctx->vo_chain->filter->input_params;
if (params.imgfmt)
sub_control(dec_sub, SD_CTRL_SET_VIDEO_PARAMS, ¶ms);
}
if (track->demuxer->fully_read && sub_can_preload(dec_sub)) {
// Assume fully_read implies no interleaved audio/video streams.
// (Reading packets will change the demuxer position.)
demux_seek(track->demuxer, 0, 0);
sub_preload(dec_sub);
}
if (!sub_read_packets(dec_sub, video_pts))
return false;
// Handle displaying subtitles on terminal; never done for secondary subs
if (mpctx->current_track[0][STREAM_SUB] == track && !mpctx->video_out)
term_osd_set_subs(mpctx, sub_get_text(dec_sub, video_pts));
// Handle displaying subtitles on VO with no video being played. This is
// quite differently, because normally subtitles are redrawn on new video
// frames, using the video frames' timestamps.
if (mpctx->video_out && mpctx->video_status == STATUS_EOF) {
if (osd_get_force_video_pts(mpctx->osd) != video_pts) {
osd_set_force_video_pts(mpctx->osd, video_pts);
osd_query_and_reset_want_redraw(mpctx->osd);
vo_redraw(mpctx->video_out);
// Force an arbitrary minimum FPS
mp_set_timeout(mpctx, 0.1);
}
}
return true;
}
// Return true if the subtitles for the given PTS are ready; false if the player
// should wait for new demuxer data, and then should retry.
bool update_subtitles(struct MPContext *mpctx, double video_pts)
{
bool ok = true;
for (int n = 0; n < NUM_PTRACKS; n++)
ok &= update_subtitle(mpctx, video_pts, mpctx->current_track[n][STREAM_SUB]);
return ok;
}
static struct attachment_list *get_all_attachments(struct MPContext *mpctx)
{
struct attachment_list *list = talloc_zero(NULL, struct attachment_list);
struct demuxer *prev_demuxer = NULL;
for (int n = 0; n < mpctx->num_tracks; n++) {
struct track *t = mpctx->tracks[n];
if (!t->demuxer || prev_demuxer == t->demuxer)
continue;
prev_demuxer = t->demuxer;
for (int i = 0; i < t->demuxer->num_attachments; i++) {
struct demux_attachment *att = &t->demuxer->attachments[i];
struct demux_attachment copy = {
.name = talloc_strdup(list, att->name),
.type = talloc_strdup(list, att->type),
.data = talloc_memdup(list, att->data, att->data_size),
.data_size = att->data_size,
};
MP_TARRAY_APPEND(list, list->entries, list->num_entries, copy);
}
}
return list;
}
static bool init_subdec(struct MPContext *mpctx, struct track *track)
{
assert(!track->d_sub);
if (!track->demuxer || !track->stream)
return false;
track->d_sub = sub_create(mpctx->global, track->stream,
get_all_attachments(mpctx));
if (!track->d_sub)
return false;
struct track *vtrack = mpctx->current_track[0][STREAM_VIDEO];
struct mp_codec_params *v_c =
vtrack && vtrack->stream ? vtrack->stream->codec : NULL;
double fps = v_c ? v_c->fps : 25;
sub_control(track->d_sub, SD_CTRL_SET_VIDEO_DEF_FPS, &fps);
return true;
}
void reinit_sub(struct MPContext *mpctx, struct track *track)
{
if (!track || !track->stream || track->stream->type != STREAM_SUB)
return;
if (!track->d_sub && !init_subdec(mpctx, track)) {
error_on_track(mpctx, track);
return;
}
sub_select(track->d_sub, true);
int order = get_order(mpctx, track);
osd_set_sub(mpctx->osd, order, track->d_sub);
sub_control(track->d_sub, SD_CTRL_SET_TOP, &(bool){!!order});
if (mpctx->playback_initialized)
update_subtitles(mpctx, mpctx->playback_pts);
}
void reinit_sub_all(struct MPContext *mpctx)
{
for (int n = 0; n < NUM_PTRACKS; n++)
reinit_sub(mpctx, mpctx->current_track[n][STREAM_SUB]);
}
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