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-rw-r--r--player/sub.c214
1 files changed, 214 insertions, 0 deletions
diff --git a/player/sub.c b/player/sub.c
new file mode 100644
index 0000000..f3e42fe
--- /dev/null
+++ b/player/sub.c
@@ -0,0 +1,214 @@
+/*
+ * 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 "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[STREAM_SUB]; 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);
+ sub_set_play_dir(track->d_sub, mpctx->play_dir);
+ }
+ term_osd_set_subs(mpctx, NULL);
+}
+
+void reset_subtitle_state(struct MPContext *mpctx)
+{
+ for (int n = 0; n < mpctx->num_tracks; n++)
+ reset_subtitles(mpctx, mpctx->tracks[n]);
+ 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);
+ sub_destroy(track->d_sub);
+ track->d_sub = 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, &params);
+ }
+
+ 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, mpctx->paused))
+ return false;
+
+ // Handle displaying subtitles on terminal; never done for secondary subs
+ if (mpctx->current_track[0][STREAM_SUB] == track && !mpctx->video_out) {
+ char *text = sub_get_text(dec_sub, video_pts, SD_TEXT_TYPE_PLAIN);
+ term_osd_set_subs(mpctx, text);
+ talloc_free(text);
+ }
+
+ // Handle displaying subtitles on VO with no video being played. This is
+ // quite different, because normally subtitles are redrawn on new video
+ // frames, using the video frames' timestamps.
+ if (mpctx->video_out && mpctx->video_status == STATUS_EOF &&
+ (mpctx->opts->subs_rend->sub_past_video_end ||
+ !mpctx->current_track[0][STREAM_VIDEO] ||
+ mpctx->current_track[0][STREAM_VIDEO]->image)) {
+ 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[STREAM_SUB]; 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,
+ get_all_attachments(mpctx),
+ get_order(mpctx, track));
+ 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;
+
+ assert(!track->d_sub);
+
+ if (!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, &order);
+
+ // When paused we have to wait for packets to be available.
+ // So just retry until we get a packet in this case.
+ if (mpctx->playback_initialized)
+ while (!update_subtitles(mpctx, mpctx->playback_pts) && mpctx->paused);
+}
+
+void reinit_sub_all(struct MPContext *mpctx)
+{
+ for (int n = 0; n < num_ptracks[STREAM_SUB]; n++)
+ reinit_sub(mpctx, mpctx->current_track[n][STREAM_SUB]);
+}
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-05 10:41:50 +0000