1 /*
2 * This file is part of mpv.
3 *
4 * mpv is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU Lesser General Public
6 * License as published by the Free Software Foundation; either
7 * version 2.1 of the License, or (at your option) any later version.
8 *
9 * mpv is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 * GNU Lesser General Public License for more details.
13 *
14 * You should have received a copy of the GNU Lesser General Public
15 * License along with mpv. If not, see <http://www.gnu.org/licenses/>.
16 */
17
18 #include <stddef.h>
19 #include <stdbool.h>
20 #include <inttypes.h>
21 #include <math.h>
22 #include <assert.h>
23
24 #include "config.h"
25 #include "mpv_talloc.h"
26
27 #include "common/msg.h"
28 #include "options/options.h"
29 #include "common/common.h"
30 #include "common/global.h"
31
32 #include "stream/stream.h"
33 #include "sub/dec_sub.h"
34 #include "demux/demux.h"
35 #include "video/mp_image.h"
36
37 #include "core.h"
38
39 // 0: primary sub, 1: secondary sub, -1: not selected
get_order(struct MPContext * mpctx,struct track * track)40 static int get_order(struct MPContext *mpctx, struct track *track)
41 {
42 for (int n = 0; n < num_ptracks[STREAM_SUB]; n++) {
43 if (mpctx->current_track[n][STREAM_SUB] == track)
44 return n;
45 }
46 return -1;
47 }
48
reset_subtitles(struct MPContext * mpctx,struct track * track)49 static void reset_subtitles(struct MPContext *mpctx, struct track *track)
50 {
51 if (track->d_sub) {
52 sub_reset(track->d_sub);
53 sub_set_play_dir(track->d_sub, mpctx->play_dir);
54 }
55 term_osd_set_subs(mpctx, NULL);
56 }
57
reset_subtitle_state(struct MPContext * mpctx)58 void reset_subtitle_state(struct MPContext *mpctx)
59 {
60 for (int n = 0; n < mpctx->num_tracks; n++)
61 reset_subtitles(mpctx, mpctx->tracks[n]);
62 term_osd_set_subs(mpctx, NULL);
63 }
64
uninit_sub(struct MPContext * mpctx,struct track * track)65 void uninit_sub(struct MPContext *mpctx, struct track *track)
66 {
67 if (track && track->d_sub) {
68 reset_subtitles(mpctx, track);
69 sub_select(track->d_sub, false);
70 int order = get_order(mpctx, track);
71 osd_set_sub(mpctx->osd, order, NULL);
72 sub_destroy(track->d_sub);
73 track->d_sub = NULL;
74 }
75 }
76
uninit_sub_all(struct MPContext * mpctx)77 void uninit_sub_all(struct MPContext *mpctx)
78 {
79 for (int n = 0; n < mpctx->num_tracks; n++)
80 uninit_sub(mpctx, mpctx->tracks[n]);
81 }
82
update_subtitle(struct MPContext * mpctx,double video_pts,struct track * track)83 static bool update_subtitle(struct MPContext *mpctx, double video_pts,
84 struct track *track)
85 {
86 struct dec_sub *dec_sub = track ? track->d_sub : NULL;
87
88 if (!dec_sub || video_pts == MP_NOPTS_VALUE)
89 return true;
90
91 if (mpctx->vo_chain) {
92 struct mp_image_params params = mpctx->vo_chain->filter->input_params;
93 if (params.imgfmt)
94 sub_control(dec_sub, SD_CTRL_SET_VIDEO_PARAMS, ¶ms);
95 }
96
97 if (track->demuxer->fully_read && sub_can_preload(dec_sub)) {
98 // Assume fully_read implies no interleaved audio/video streams.
99 // (Reading packets will change the demuxer position.)
100 demux_seek(track->demuxer, 0, 0);
101 sub_preload(dec_sub);
102 }
103
104 if (!sub_read_packets(dec_sub, video_pts))
105 return false;
106
107 // Handle displaying subtitles on terminal; never done for secondary subs
108 if (mpctx->current_track[0][STREAM_SUB] == track && !mpctx->video_out) {
109 char *text = sub_get_text(dec_sub, video_pts, SD_TEXT_TYPE_PLAIN);
110 term_osd_set_subs(mpctx, text);
111 talloc_free(text);
112 }
113
114 // Handle displaying subtitles on VO with no video being played. This is
115 // quite different, because normally subtitles are redrawn on new video
116 // frames, using the video frames' timestamps.
117 if (mpctx->video_out && mpctx->video_status == STATUS_EOF &&
118 (mpctx->opts->subs_rend->sub_past_video_end ||
119 !mpctx->current_track[0][STREAM_VIDEO] ||
120 mpctx->current_track[0][STREAM_VIDEO]->attached_picture)) {
121 if (osd_get_force_video_pts(mpctx->osd) != video_pts) {
122 osd_set_force_video_pts(mpctx->osd, video_pts);
123 osd_query_and_reset_want_redraw(mpctx->osd);
124 vo_redraw(mpctx->video_out);
125 // Force an arbitrary minimum FPS
126 mp_set_timeout(mpctx, 0.1);
127 }
128 }
129
130 return true;
131 }
132
133 // Return true if the subtitles for the given PTS are ready; false if the player
134 // should wait for new demuxer data, and then should retry.
update_subtitles(struct MPContext * mpctx,double video_pts)135 bool update_subtitles(struct MPContext *mpctx, double video_pts)
136 {
137 bool ok = true;
138 for (int n = 0; n < num_ptracks[STREAM_SUB]; n++)
139 ok &= update_subtitle(mpctx, video_pts, mpctx->current_track[n][STREAM_SUB]);
140 return ok;
141 }
142
get_all_attachments(struct MPContext * mpctx)143 static struct attachment_list *get_all_attachments(struct MPContext *mpctx)
144 {
145 struct attachment_list *list = talloc_zero(NULL, struct attachment_list);
146 struct demuxer *prev_demuxer = NULL;
147 for (int n = 0; n < mpctx->num_tracks; n++) {
148 struct track *t = mpctx->tracks[n];
149 if (!t->demuxer || prev_demuxer == t->demuxer)
150 continue;
151 prev_demuxer = t->demuxer;
152 for (int i = 0; i < t->demuxer->num_attachments; i++) {
153 struct demux_attachment *att = &t->demuxer->attachments[i];
154 struct demux_attachment copy = {
155 .name = talloc_strdup(list, att->name),
156 .type = talloc_strdup(list, att->type),
157 .data = talloc_memdup(list, att->data, att->data_size),
158 .data_size = att->data_size,
159 };
160 MP_TARRAY_APPEND(list, list->entries, list->num_entries, copy);
161 }
162 }
163 return list;
164 }
165
init_subdec(struct MPContext * mpctx,struct track * track)166 static bool init_subdec(struct MPContext *mpctx, struct track *track)
167 {
168 assert(!track->d_sub);
169
170 if (!track->demuxer || !track->stream)
171 return false;
172
173 track->d_sub = sub_create(mpctx->global, track->stream,
174 get_all_attachments(mpctx),
175 get_order(mpctx, track));
176 if (!track->d_sub)
177 return false;
178
179 struct track *vtrack = mpctx->current_track[0][STREAM_VIDEO];
180 struct mp_codec_params *v_c =
181 vtrack && vtrack->stream ? vtrack->stream->codec : NULL;
182 double fps = v_c ? v_c->fps : 25;
183 sub_control(track->d_sub, SD_CTRL_SET_VIDEO_DEF_FPS, &fps);
184
185 return true;
186 }
187
reinit_sub(struct MPContext * mpctx,struct track * track)188 void reinit_sub(struct MPContext *mpctx, struct track *track)
189 {
190 if (!track || !track->stream || track->stream->type != STREAM_SUB)
191 return;
192
193 assert(!track->d_sub);
194
195 if (!init_subdec(mpctx, track)) {
196 error_on_track(mpctx, track);
197 return;
198 }
199
200 sub_select(track->d_sub, true);
201 int order = get_order(mpctx, track);
202 osd_set_sub(mpctx->osd, order, track->d_sub);
203 sub_control(track->d_sub, SD_CTRL_SET_TOP, &order);
204
205 if (mpctx->playback_initialized)
206 update_subtitles(mpctx, mpctx->playback_pts);
207 }
208
reinit_sub_all(struct MPContext * mpctx)209 void reinit_sub_all(struct MPContext *mpctx)
210 {
211 for (int n = 0; n < num_ptracks[STREAM_SUB]; n++)
212 reinit_sub(mpctx, mpctx->current_track[n][STREAM_SUB]);
213 }
214