Split mplayer.c

mplayer.c was a bit too big. Split it into multiple files. I hope the
way it's split makes sense. Maybe some things don't make too much sense,
or go against intuition. These will fixed as soon as I notice them.

Some files are a bit questionable (misc.c, osd.c, configfiles.c), and
suggestions how to organize this better are welcome.

Regressions are possible due to reorganized include statements.
Obviously I didn't just copy mplayer.c's orgy of include statements, but
recreated them for each file. It's easily possible that there are
oversights and mistakes, which will show up on other platforms.

There is one actual change: the public avutil.h include is removed from
encode.h, and I tried to replace most FFMIN/FFMAX/av_clip uses. I
consider using libavutil too much as dangerous, because the set of
include files they recursively pull in is rather arbitrary and is
different between FFmpeg and Libav.

1 files changed, 1427 insertions, 0 deletions

diff --git a/mpvcore/player/loadfile.c b/mpvcore/player/loadfile.c
new file mode 100644
index 0000000000..876994ac93
--- /dev/null
+++ b/mpvcore/player/loadfile.c
@@ -0,0 +1,1427 @@
+/*
+ * This file is part of MPlayer.
+ *
+ * MPlayer 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.
+ *
+ * MPlayer 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 MPlayer; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ */
+
+#include <stddef.h>
+#include <stdbool.h>
+#include <inttypes.h>
+#include <assert.h>
+
+#include <libavutil/avutil.h>
+
+#include "config.h"
+#include "talloc.h"
+
+#include "osdep/getch2.h"
+#include "osdep/io.h"
+#include "osdep/timer.h"
+
+#include "mpvcore/mp_msg.h"
+#include "mpvcore/path.h"
+#include "mpvcore/m_config.h"
+#include "mpvcore/parser-cfg.h"
+#include "mpvcore/playlist.h"
+#include "mpvcore/options.h"
+#include "mpvcore/m_property.h"
+#include "mpvcore/mp_common.h"
+#include "mpvcore/resolve.h"
+#include "mpvcore/encode.h"
+#include "mpvcore/input/input.h"
+
+#include "audio/mixer.h"
+#include "audio/decode/dec_audio.h"
+#include "audio/out/ao.h"
+#include "demux/demux.h"
+#include "stream/stream.h"
+#include "sub/ass_mp.h"
+#include "sub/dec_sub.h"
+#include "sub/find_subfiles.h"
+#include "video/decode/dec_video.h"
+#include "video/out/vo.h"
+
+#include "mp_core.h"
+#include "command.h"
+
+#ifdef CONFIG_DVBIN
+#include "stream/dvbin.h"
+#endif
+
+void uninit_player(struct MPContext *mpctx, unsigned int mask)
+{
+    mask &= mpctx->initialized_flags;
+
+    MP_DBG(mpctx, "\n*** uninit(0x%X)\n", mask);
+
+    if (mask & INITIALIZED_ACODEC) {
+        mpctx->initialized_flags &= ~INITIALIZED_ACODEC;
+        mixer_uninit_audio(mpctx->mixer);
+        if (mpctx->sh_audio)
+            uninit_audio(mpctx->sh_audio);
+        cleanup_demux_stream(mpctx, STREAM_AUDIO);
+    }
+
+    if (mask & INITIALIZED_SUB) {
+        mpctx->initialized_flags &= ~INITIALIZED_SUB;
+        if (mpctx->sh_sub)
+            sub_reset(mpctx->sh_sub->dec_sub);
+        cleanup_demux_stream(mpctx, STREAM_SUB);
+        mpctx->osd->dec_sub = NULL;
+        reset_subtitles(mpctx);
+    }
+
+    if (mask & INITIALIZED_LIBASS) {
+        mpctx->initialized_flags &= ~INITIALIZED_LIBASS;
+#ifdef CONFIG_ASS
+        if (mpctx->osd->ass_renderer)
+            ass_renderer_done(mpctx->osd->ass_renderer);
+        mpctx->osd->ass_renderer = NULL;
+        ass_clear_fonts(mpctx->ass_library);
+#endif
+    }
+
+    if (mask & INITIALIZED_VCODEC) {
+        mpctx->initialized_flags &= ~INITIALIZED_VCODEC;
+        if (mpctx->sh_video)
+            uninit_video(mpctx->sh_video);
+        cleanup_demux_stream(mpctx, STREAM_VIDEO);
+        mpctx->sync_audio_to_video = false;
+    }
+
+    if (mask & INITIALIZED_DEMUXER) {
+        mpctx->initialized_flags &= ~INITIALIZED_DEMUXER;
+        for (int i = 0; i < mpctx->num_tracks; i++) {
+            talloc_free(mpctx->tracks[i]);
+        }
+        mpctx->num_tracks = 0;
+        for (int t = 0; t < STREAM_TYPE_COUNT; t++)
+            mpctx->current_track[t] = NULL;
+        assert(!mpctx->sh_video && !mpctx->sh_audio && !mpctx->sh_sub);
+        mpctx->master_demuxer = NULL;
+        for (int i = 0; i < mpctx->num_sources; i++) {
+            uninit_subs(mpctx->sources[i]);
+            struct demuxer *demuxer = mpctx->sources[i];
+            if (demuxer->stream != mpctx->stream)
+                free_stream(demuxer->stream);
+            free_demuxer(demuxer);
+        }
+        talloc_free(mpctx->sources);
+        mpctx->sources = NULL;
+        mpctx->demuxer = NULL;
+        mpctx->num_sources = 0;
+        talloc_free(mpctx->timeline);
+        mpctx->timeline = NULL;
+        mpctx->num_timeline_parts = 0;
+        talloc_free(mpctx->chapters);
+        mpctx->chapters = NULL;
+        mpctx->num_chapters = 0;
+        mpctx->video_offset = 0;
+    }
+
+    // kill the cache process:
+    if (mask & INITIALIZED_STREAM) {
+        mpctx->initialized_flags &= ~INITIALIZED_STREAM;
+        if (mpctx->stream)
+            free_stream(mpctx->stream);
+        mpctx->stream = NULL;
+    }
+
+    if (mask & INITIALIZED_VO) {
+        mpctx->initialized_flags &= ~INITIALIZED_VO;
+        vo_destroy(mpctx->video_out);
+        mpctx->video_out = NULL;
+    }
+
+    // Must be after libvo uninit, as few vo drivers (svgalib) have tty code.
+    if (mask & INITIALIZED_GETCH2) {
+        mpctx->initialized_flags &= ~INITIALIZED_GETCH2;
+        MP_DBG(mpctx, "\n[[[uninit getch2]]]\n");
+        // restore terminal:
+        getch2_disable();
+    }
+
+    if (mask & INITIALIZED_AO) {
+        mpctx->initialized_flags &= ~INITIALIZED_AO;
+        if (mpctx->ao)
+            ao_uninit(mpctx->ao, mpctx->stop_play != AT_END_OF_FILE);
+        mpctx->ao = NULL;
+    }
+
+    if (mask & INITIALIZED_PLAYBACK)
+        mpctx->initialized_flags &= ~INITIALIZED_PLAYBACK;
+}
+
+static void print_stream(struct MPContext *mpctx, struct track *t)
+{
+    struct sh_stream *s = t->stream;
+    const char *tname = "?";
+    const char *selopt = "?";
+    const char *langopt = "?";
+    const char *iid = NULL;
+    switch (t->type) {
+    case STREAM_VIDEO:
+        tname = "Video"; selopt = "vid"; langopt = NULL; iid = "VID";
+        break;
+    case STREAM_AUDIO:
+        tname = "Audio"; selopt = "aid"; langopt = "alang"; iid = "AID";
+        break;
+    case STREAM_SUB:
+        tname = "Subs"; selopt = "sid"; langopt = "slang"; iid = "SID";
+        break;
+    }
+    MP_INFO(mpctx, "[stream] %-5s %3s",
+            tname, mpctx->current_track[t->type] == t ? "(+)" : "");
+    MP_INFO(mpctx, " --%s=%d", selopt, t->user_tid);
+    if (t->lang && langopt)
+        MP_INFO(mpctx, " --%s=%s", langopt, t->lang);
+    if (t->default_track)
+        MP_INFO(mpctx, " (*)");
+    if (t->attached_picture)
+        MP_INFO(mpctx, " [P]");
+    if (t->title)
+        MP_INFO(mpctx, " '%s'", t->title);
+    const char *codec = s ? s->codec : NULL;
+    MP_INFO(mpctx, " (%s)", codec ? codec : "<unknown>");
+    if (t->is_external)
+        MP_INFO(mpctx, " (external)");
+    MP_INFO(mpctx, "\n");
+    // legacy compatibility
+    if (!iid)
+        return;
+    int id = t->user_tid;
+    mp_msg(MSGT_IDENTIFY, MSGL_INFO, "ID_%s_ID=%d\n", iid, id);
+    if (t->title)
+        mp_msg(MSGT_IDENTIFY, MSGL_INFO, "ID_%s_%d_NAME=%s\n", iid, id, t->title);
+    if (t->lang)
+        mp_msg(MSGT_IDENTIFY, MSGL_INFO, "ID_%s_%d_LANG=%s\n", iid, id, t->lang);
+}
+
+static void print_file_properties(struct MPContext *mpctx)
+{
+    mp_msg(MSGT_IDENTIFY, MSGL_INFO, "ID_FILENAME=%s\n", mpctx->filename);
+    if (mpctx->sh_video) {
+        /* Assume FOURCC if all bytes >= 0x20 (' ') */
+        if (mpctx->sh_video->format >= 0x20202020)
+            mp_msg(MSGT_IDENTIFY, MSGL_INFO,
+                   "ID_VIDEO_FORMAT=%.4s\n", (char *)&mpctx->sh_video->format);
+        else
+            mp_msg(MSGT_IDENTIFY, MSGL_INFO,
+                   "ID_VIDEO_FORMAT=0x%08X\n", mpctx->sh_video->format);
+        mp_msg(MSGT_IDENTIFY, MSGL_INFO,
+               "ID_VIDEO_BITRATE=%d\n", mpctx->sh_video->i_bps * 8);
+        mp_msg(MSGT_IDENTIFY, MSGL_INFO,
+               "ID_VIDEO_WIDTH=%d\n", mpctx->sh_video->disp_w);
+        mp_msg(MSGT_IDENTIFY, MSGL_INFO,
+               "ID_VIDEO_HEIGHT=%d\n", mpctx->sh_video->disp_h);
+        mp_msg(MSGT_IDENTIFY, MSGL_INFO,
+               "ID_VIDEO_FPS=%5.3f\n", mpctx->sh_video->fps);
+        mp_msg(MSGT_IDENTIFY, MSGL_INFO,
+               "ID_VIDEO_ASPECT=%1.4f\n", mpctx->sh_video->aspect);
+    }
+    if (mpctx->sh_audio) {
+        /* Assume FOURCC if all bytes >= 0x20 (' ') */
+        if (mpctx->sh_audio->format >= 0x20202020)
+            mp_msg(MSGT_IDENTIFY, MSGL_INFO,
+                   "ID_AUDIO_FORMAT=%.4s\n", (char *)&mpctx->sh_audio->format);
+        else
+            mp_msg(MSGT_IDENTIFY, MSGL_INFO,
+                   "ID_AUDIO_FORMAT=%d\n", mpctx->sh_audio->format);
+        mp_msg(MSGT_IDENTIFY, MSGL_INFO,
+               "ID_AUDIO_BITRATE=%d\n", mpctx->sh_audio->i_bps * 8);
+        mp_msg(MSGT_IDENTIFY, MSGL_INFO,
+               "ID_AUDIO_RATE=%d\n", mpctx->sh_audio->samplerate);
+        mp_msg(MSGT_IDENTIFY, MSGL_INFO,
+               "ID_AUDIO_NCH=%d\n", mpctx->sh_audio->channels.num);
+    }
+    mp_msg(MSGT_IDENTIFY, MSGL_INFO,
+           "ID_LENGTH=%.2f\n", get_time_length(mpctx));
+    int chapter_count = get_chapter_count(mpctx);
+    if (chapter_count >= 0) {
+        mp_msg(MSGT_IDENTIFY, MSGL_INFO, "ID_CHAPTERS=%d\n", chapter_count);
+        for (int i = 0; i < chapter_count; i++) {
+            mp_msg(MSGT_IDENTIFY, MSGL_INFO, "ID_CHAPTER_ID=%d\n", i);
+            // print in milliseconds
+            double time = chapter_start_time(mpctx, i) * 1000.0;
+            mp_msg(MSGT_IDENTIFY, MSGL_INFO, "ID_CHAPTER_%d_START=%"PRId64"\n",
+                   i, (int64_t)(time < 0 ? -1 : time));
+            char *name = chapter_name(mpctx, i);
+            if (name) {
+                mp_msg(MSGT_IDENTIFY, MSGL_INFO, "ID_CHAPTER_%d_NAME=%s\n", i,
+                       name);
+                talloc_free(name);
+            }
+        }
+    }
+    struct demuxer *demuxer = mpctx->master_demuxer;
+    if (demuxer->num_editions > 1)
+        MP_INFO(mpctx, "Playing edition %d of %d (--edition=%d).\n",
+                demuxer->edition + 1, demuxer->num_editions, demuxer->edition);
+    for (int t = 0; t < STREAM_TYPE_COUNT; t++) {
+        for (int n = 0; n < mpctx->num_tracks; n++)
+            if (mpctx->tracks[n]->type == t)
+                print_stream(mpctx, mpctx->tracks[n]);
+    }
+}
+
+static void set_demux_field(struct MPContext *mpctx, enum stream_type type,
+                            struct sh_stream *s)
+{
+    mpctx->sh[type] = s;
+    // redundant fields for convenience access
+    switch(type) {
+        case STREAM_VIDEO: mpctx->sh_video = s ? s->video : NULL; break;
+        case STREAM_AUDIO: mpctx->sh_audio = s ? s->audio : NULL; break;
+        case STREAM_SUB: mpctx->sh_sub = s ? s->sub : NULL; break;
+    }
+}
+
+void init_demux_stream(struct MPContext *mpctx, enum stream_type type)
+{
+    struct track *track = mpctx->current_track[type];
+    set_demux_field(mpctx, type, track ? track->stream : NULL);
+    struct sh_stream *stream = mpctx->sh[type];
+    if (stream) {
+        demuxer_switch_track(stream->demuxer, type, stream);
+        if (track->is_external) {
+            double pts = get_main_demux_pts(mpctx);
+            demux_seek(stream->demuxer, pts, SEEK_ABSOLUTE);
+        }
+    }
+}
+
+void cleanup_demux_stream(struct MPContext *mpctx, enum stream_type type)
+{
+    struct sh_stream *stream = mpctx->sh[type];
+    if (stream)
+        demuxer_switch_track(stream->demuxer, type, NULL);
+    set_demux_field(mpctx, type, NULL);
+}
+
+// Switch the demuxers to current track selection. This is possibly important
+// for intialization: if something reads packets from the demuxer (like at least
+// reinit_audio_chain does, or when seeking), packets from the other streams
+// should be queued instead of discarded. So all streams should be enabled
+// before the first initialization function is called.
+static void preselect_demux_streams(struct MPContext *mpctx)
+{
+    // Disable all streams, just to be sure no unwanted streams are selected.
+    for (int n = 0; n < mpctx->num_sources; n++) {
+        for (int type = 0; type < STREAM_TYPE_COUNT; type++) {
+            struct track *track = mpctx->current_track[type];
+            if (!(track && track->demuxer == mpctx->sources[n] &&
+                  demuxer_stream_is_selected(track->demuxer, track->stream)))
+                demuxer_switch_track(mpctx->sources[n], type, NULL);
+        }
+    }
+
+    for (int type = 0; type < STREAM_TYPE_COUNT; type++) {
+        struct track *track = mpctx->current_track[type];
+        if (track && track->stream)
+            demuxer_switch_track(track->stream->demuxer, type, track->stream);
+    }
+}
+
+bool timeline_set_part(struct MPContext *mpctx, int i, bool force)
+{
+    struct timeline_part *p = mpctx->timeline + mpctx->timeline_part;
+    struct timeline_part *n = mpctx->timeline + i;
+    mpctx->timeline_part = i;
+    mpctx->video_offset = n->start - n->source_start;
+    if (n->source == p->source && !force)
+        return false;
+    enum stop_play_reason orig_stop_play = mpctx->stop_play;
+    if (!mpctx->sh_video && mpctx->stop_play == KEEP_PLAYING)
+        mpctx->stop_play = AT_END_OF_FILE;  // let audio uninit drain data
+    uninit_player(mpctx, INITIALIZED_VCODEC | (mpctx->opts->fixed_vo ? 0 : INITIALIZED_VO) | (mpctx->opts->gapless_audio ? 0 : INITIALIZED_AO) | INITIALIZED_ACODEC | INITIALIZED_SUB);
+    mpctx->stop_play = orig_stop_play;
+
+    mpctx->demuxer = n->source;
+    mpctx->stream = mpctx->demuxer->stream;
+
+    // While another timeline was active, the selection of active tracks might
+    // have been changed - possibly we need to update this source.
+    for (int x = 0; x < mpctx->num_tracks; x++) {
+        struct track *track = mpctx->tracks[x];
+        if (track->under_timeline) {
+            track->demuxer = mpctx->demuxer;
+            track->stream = demuxer_stream_by_demuxer_id(track->demuxer,
+                                                         track->type,
+                                                         track->demuxer_id);
+        }
+    }
+    preselect_demux_streams(mpctx);
+
+    return true;
+}
+
+// Given pts, switch playback to the corresponding part.
+// Return offset within that part.
+double timeline_set_from_time(struct MPContext *mpctx, double pts, bool *need_reset)
+{
+    if (pts < 0)
+        pts = 0;
+    for (int i = 0; i < mpctx->num_timeline_parts; i++) {
+        struct timeline_part *p = mpctx->timeline + i;
+        if (pts < (p + 1)->start) {
+            *need_reset = timeline_set_part(mpctx, i, false);
+            return pts - p->start + p->source_start;
+        }
+    }
+    return -1;
+}
+
+// Map stream number (as used by libdvdread) to MPEG IDs (as used by demuxer).
+static int map_id_from_demuxer(struct demuxer *d, enum stream_type type, int id)
+{
+    if (d->stream->uncached_type == STREAMTYPE_DVD && type == STREAM_SUB)
+        id = id & 0x1F;
+    return id;
+}
+
+static int find_new_tid(struct MPContext *mpctx, enum stream_type t)
+{
+    int new_id = 0;
+    for (int i = 0; i < mpctx->num_tracks; i++) {
+        struct track *track = mpctx->tracks[i];
+        if (track->type == t)
+            new_id = MPMAX(new_id, track->user_tid);
+    }
+    return new_id + 1;
+}
+
+static struct track *add_stream_track(struct MPContext *mpctx,
+                                      struct sh_stream *stream,
+                                      bool under_timeline)
+{
+    for (int i = 0; i < mpctx->num_tracks; i++) {
+        struct track *track = mpctx->tracks[i];
+        if (track->stream == stream)
+            return track;
+        // DVD subtitle track that was added later
+        if (stream->type == STREAM_SUB && track->type == STREAM_SUB &&
+            map_id_from_demuxer(stream->demuxer, stream->type,
+                                stream->demuxer_id) == track->demuxer_id
+            && !track->stream)
+        {
+            track->stream = stream;
+            track->demuxer_id = stream->demuxer_id;
+            // Initialize lazily selected track
+            bool selected = track == mpctx->current_track[STREAM_SUB];
+            demuxer_select_track(track->demuxer, stream, selected);
+            if (selected)
+                reinit_subs(mpctx);
+            return track;
+        }
+    }
+
+    struct track *track = talloc_ptrtype(NULL, track);
+    *track = (struct track) {
+        .type = stream->type,
+        .user_tid = find_new_tid(mpctx, stream->type),
+        .demuxer_id = stream->demuxer_id,
+        .title = stream->title,
+        .default_track = stream->default_track,
+        .attached_picture = stream->attached_picture != NULL,
+        .lang = stream->lang,
+        .under_timeline = under_timeline,
+        .demuxer = stream->demuxer,
+        .stream = stream,
+    };
+    MP_TARRAY_APPEND(mpctx, mpctx->tracks, mpctx->num_tracks, track);
+
+    if (stream->type == STREAM_SUB)
+        track->preloaded = !!stream->sub->track;
+
+    // Needed for DVD and Blu-ray.
+    if (!track->lang) {
+        struct stream_lang_req req = {
+            .type = track->type,
+            .id = map_id_from_demuxer(track->demuxer, track->type,
+                                      track->demuxer_id)
+        };
+        stream_control(track->demuxer->stream, STREAM_CTRL_GET_LANG, &req);
+        if (req.name[0])
+            track->lang = talloc_strdup(track, req.name);
+    }
+
+    demuxer_select_track(track->demuxer, stream, false);
+
+    mp_notify(mpctx, MP_EVENT_TRACKS_CHANGED, NULL);
+
+    return track;
+}
+
+void add_demuxer_tracks(struct MPContext *mpctx, struct demuxer *demuxer)
+{
+    for (int n = 0; n < demuxer->num_streams; n++)
+        add_stream_track(mpctx, demuxer->streams[n], !!mpctx->timeline);
+}
+
+static void add_dvd_tracks(struct MPContext *mpctx)
+{
+#ifdef CONFIG_DVDREAD
+    struct demuxer *demuxer = mpctx->demuxer;
+    struct stream *stream = demuxer->stream;
+    struct stream_dvd_info_req info;
+    if (stream_control(stream, STREAM_CTRL_GET_DVD_INFO, &info) > 0) {
+        for (int n = 0; n < info.num_subs; n++) {
+            struct track *track = talloc_ptrtype(NULL, track);
+            *track = (struct track) {
+                .type = STREAM_SUB,
+                .user_tid = find_new_tid(mpctx, STREAM_SUB),
+                .demuxer_id = n,
+                .demuxer = mpctx->demuxer,
+            };
+            MP_TARRAY_APPEND(mpctx, mpctx->tracks, mpctx->num_tracks, track);
+
+            struct stream_lang_req req = {.type = STREAM_SUB, .id = n};
+            stream_control(stream, STREAM_CTRL_GET_LANG, &req);
+            track->lang = talloc_strdup(track, req.name);
+
+            mp_notify(mpctx, MP_EVENT_TRACKS_CHANGED, NULL);
+        }
+    }
+    demuxer_enable_autoselect(demuxer);
+#endif
+}
+
+// Result numerically higher => better match. 0 == no match.
+static int match_lang(char **langs, char *lang)
+{
+    for (int idx = 0; langs && langs[idx]; idx++) {
+        if (lang && strcmp(langs[idx], lang) == 0)
+            return INT_MAX - idx;
+    }
+    return 0;
+}
+
+/* Get the track wanted by the user.
+ * tid is the track ID requested by the user (-2: deselect, -1: default)
+ * lang is a string list, NULL is same as empty list
+ * Sort tracks based on the following criteria, and pick the first:
+ * 0) track matches tid (always wins)
+ * 1) track is external
+ * 1b) track was passed explicitly (is not an auto-loaded subtitle)
+ * 2) earlier match in lang list
+ * 3) track is marked default
+ * 4) lower track number
+ * If select_fallback is not set, 4) is only used to determine whether a
+ * matching track is preferred over another track. Otherwise, always pick a
+ * track (if nothing else matches, return the track with lowest ID).
+ */
+// Return whether t1 is preferred over t2
+static bool compare_track(struct track *t1, struct track *t2, char **langs)
+{
+    if (t1->is_external != t2->is_external)
+        return t1->is_external;
+    if (t1->auto_loaded != t2->auto_loaded)
+        return !t1->auto_loaded;
+    int l1 = match_lang(langs, t1->lang), l2 = match_lang(langs, t2->lang);
+    if (l1 != l2)
+        return l1 > l2;
+    if (t1->default_track != t2->default_track)
+        return t1->default_track;
+    if (t1->attached_picture != t2->attached_picture)
+        return !t1->attached_picture;
+    return t1->user_tid <= t2->user_tid;
+}
+static struct track *select_track(struct MPContext *mpctx,
+                                  enum stream_type type, int tid, char **langs)
+{
+    if (tid == -2)
+        return NULL;
+    bool select_fallback = type == STREAM_VIDEO || type == STREAM_AUDIO;
+    struct track *pick = NULL;
+    for (int n = 0; n < mpctx->num_tracks; n++) {
+        struct track *track = mpctx->tracks[n];
+        if (track->type != type)
+            continue;
+        if (track->user_tid == tid)
+            return track;
+        if (!pick || compare_track(track, pick, langs))
+            pick = track;
+    }
+    if (pick && !select_fallback && !pick->is_external
+        && !match_lang(langs, pick->lang) && !pick->default_track)
+        pick = NULL;
+    if (pick && pick->attached_picture && !mpctx->opts->audio_display)
+        pick = NULL;
+    return pick;
+}
+
+static char *track_layout_hash(struct MPContext *mpctx)
+{
+    char *h = talloc_strdup(NULL, "");
+    for (int type = 0; type < STREAM_TYPE_COUNT; type++) {
+        for (int n = 0; n < mpctx->num_tracks; n++) {
+            struct track *track = mpctx->tracks[n];
+            if (track->type != type)
+                continue;
+            h = talloc_asprintf_append_buffer(h, "%d-%d-%d-%d-%s\n", type,
+                    track->user_tid, track->default_track, track->is_external,
+                    track->lang ? track->lang : "");
+        }
+    }
+    return h;
+}
+
+// Normally, video/audio/sub track selection is persistent across files. This
+// code resets track selection if the new file has a different track layout.
+static void check_previous_track_selection(struct MPContext *mpctx)
+{
+    struct MPOpts *opts = mpctx->opts;
+
+    if (!mpctx->track_layout_hash)
+        return;
+
+    char *h = track_layout_hash(mpctx);
+    if (strcmp(h, mpctx->track_layout_hash) != 0) {
+        // Reset selection, but only if they're not "auto" or "off".
+        if (opts->video_id >= 0)
+            mpctx->opts->video_id = -1;
+        if (opts->audio_id >= 0)
+            mpctx->opts->audio_id = -1;
+        if (opts->sub_id >= 0)
+            mpctx->opts->sub_id = -1;
+        talloc_free(mpctx->track_layout_hash);
+        mpctx->track_layout_hash = NULL;
+    }
+    talloc_free(h);
+}
+
+void mp_switch_track(struct MPContext *mpctx, enum stream_type type,
+                     struct track *track)
+{
+    assert(!track || track->type == type);
+
+    struct track *current = mpctx->current_track[type];
+    if (track == current)
+        return;
+
+    if (type == STREAM_VIDEO) {
+        int uninit = INITIALIZED_VCODEC;
+        if (!mpctx->opts->force_vo)
+            uninit |= mpctx->opts->fixed_vo && track ? 0 : INITIALIZED_VO;
+        uninit_player(mpctx, uninit);
+    } else if (type == STREAM_AUDIO) {
+        uninit_player(mpctx, INITIALIZED_AO | INITIALIZED_ACODEC);
+    } else if (type == STREAM_SUB) {
+        uninit_player(mpctx, INITIALIZED_SUB);
+    }
+
+    mpctx->current_track[type] = track;
+
+    int user_tid = track ? track->user_tid : -2;
+    if (type == STREAM_VIDEO) {
+        mpctx->opts->video_id = user_tid;
+        reinit_video_chain(mpctx);
+        mp_notify_property(mpctx, "vid");
+    } else if (type == STREAM_AUDIO) {
+        mpctx->opts->audio_id = user_tid;
+        reinit_audio_chain(mpctx);
+        mp_notify_property(mpctx, "aid");
+    } else if (type == STREAM_SUB) {
+        mpctx->opts->sub_id = user_tid;
+        reinit_subs(mpctx);
+        mp_notify_property(mpctx, "sid");
+    }
+
+    talloc_free(mpctx->track_layout_hash);
+    mpctx->track_layout_hash = talloc_steal(mpctx, track_layout_hash(mpctx));
+}
+
+struct track *mp_track_by_tid(struct MPContext *mpctx, enum stream_type type,
+                              int tid)
+{
+    if (tid == -1)
+        return mpctx->current_track[type];
+    for (int n = 0; n < mpctx->num_tracks; n++) {
+        struct track *track = mpctx->tracks[n];
+        if (track->type == type && track->user_tid == tid)
+            return track;
+    }
+    return NULL;
+}
+
+bool mp_remove_track(struct MPContext *mpctx, struct track *track)
+{
+    if (track->under_timeline)
+        return false;
+    if (!track->is_external)
+        return false;
+
+    if (mpctx->current_track[track->type] == track) {
+        mp_switch_track(mpctx, track->type, NULL);
+        if (mpctx->current_track[track->type] == track)
+            return false;
+    }
+
+    int index = 0;
+    while (index < mpctx->num_tracks && mpctx->tracks[index] != track)
+        index++;
+    assert(index < mpctx->num_tracks);
+    while (index + 1 < mpctx->num_tracks) {
+        mpctx->tracks[index] = mpctx->tracks[index + 1];
+        index++;
+    }
+    mpctx->num_tracks--;
+    talloc_free(track);
+
+    mp_notify(mpctx, MP_EVENT_TRACKS_CHANGED, NULL);
+
+    return true;
+}
+
+static void open_subtitles_from_options(struct MPContext *mpctx)
+{
+    // after reading video params we should load subtitles because
+    // we know fps so now we can adjust subtitle time to ~6 seconds AST
+    // check .sub
+    if (mpctx->opts->sub_name) {
+        for (int i = 0; mpctx->opts->sub_name[i] != NULL; ++i)
+            mp_add_subtitles(mpctx, mpctx->opts->sub_name[i]);
+    }
+    if (mpctx->opts->sub_auto) { // auto load sub file ...
+        char **tmp = find_text_subtitles(mpctx->opts, mpctx->filename);
+        int nsub = MP_TALLOC_ELEMS(tmp);
+        for (int i = 0; i < nsub; i++) {
+            char *filename = tmp[i];
+            for (int n = 0; n < mpctx->num_sources; n++) {
+                if (strcmp(mpctx->sources[n]->stream->url, filename) == 0)
+                    goto skip;
+            }
+            struct track *track = mp_add_subtitles(mpctx, filename);
+            if (track)
+                track->auto_loaded = true;
+        skip:;
+        }
+        talloc_free(tmp);
+    }
+}
+
+static struct track *open_external_file(struct MPContext *mpctx, char *filename,
+                                        char *demuxer_name, int stream_cache,
+                                        enum stream_type filter)
+{
+    struct MPOpts *opts = mpctx->opts;
+    if (!filename)
+        return NULL;
+    char *disp_filename = filename;
+    if (strncmp(disp_filename, "memory://", 9) == 0)
+        disp_filename = "memory://"; // avoid noise
+    struct stream *stream = stream_open(filename, mpctx->opts);
+    if (!stream)
+        goto err_out;
+    stream_enable_cache_percent(&stream, stream_cache,
+                                opts->stream_cache_def_size,
+                                opts->stream_cache_min_percent,
+                                opts->stream_cache_seek_min_percent);
+    struct demuxer_params params = {
+        .ass_library = mpctx->ass_library, // demux_libass requires it
+    };
+    struct demuxer *demuxer =
+        demux_open(stream, demuxer_name, &params, mpctx->opts);
+    if (!demuxer) {
+        free_stream(stream);
+        goto err_out;
+    }
+    struct track *first = NULL;
+    for (int n = 0; n < demuxer->num_streams; n++) {
+        struct sh_stream *sh = demuxer->streams[n];
+        if (sh->type == filter) {
+            struct track *t = add_stream_track(mpctx, sh, false);
+            t->is_external = true;
+            t->title = talloc_strdup(t, disp_filename);
+            t->external_filename = talloc_strdup(t, filename);
+            first = t;
+        }
+    }
+    if (!first) {
+        free_demuxer(demuxer);
+        free_stream(stream);
+        MP_WARN(mpctx, "No streams added from file %s.\n",
+                disp_filename);
+        goto err_out;
+    }
+    MP_TARRAY_APPEND(NULL, mpctx->sources, mpctx->num_sources, demuxer);
+    return first;
+
+err_out:
+    MP_ERR(mpctx, "Can not open external file %s.\n",
+           disp_filename);
+    return false;
+}
+
+static void open_audiofiles_from_options(struct MPContext *mpctx)
+{
+    struct MPOpts *opts = mpctx->opts;
+    open_external_file(mpctx, opts->audio_stream, opts->audio_demuxer_name,
+                       opts->audio_stream_cache, STREAM_AUDIO);
+}
+
+struct track *mp_add_subtitles(struct MPContext *mpctx, char *filename)
+{
+    struct MPOpts *opts = mpctx->opts;
+    return open_external_file(mpctx, filename, opts->sub_demuxer_name, 0,
+                              STREAM_SUB);
+}
+
+static void open_subtitles_from_resolve(struct MPContext *mpctx)
+{
+    struct MPOpts *opts = mpctx->opts;
+    struct mp_resolve_result *res = mpctx->resolve_result;
+    if (!res)
+        return;
+    for (int n = 0; n < res->num_subs; n++) {
+        struct mp_resolve_sub *sub = res->subs[n];
+        char *s = talloc_strdup(NULL, sub->url);
+        if (!s)
+            s = talloc_asprintf(NULL, "memory://%s", sub->data);
+        struct track *t =
+            open_external_file(mpctx, s, opts->sub_demuxer_name, 0, STREAM_SUB);
+        talloc_free(s);
+        if (t)
+            t->lang = talloc_strdup(t, sub->lang);
+    }
+}
+
+static bool attachment_is_font(struct demux_attachment *att)
+{
+    if (!att->name || !att->type || !att->data || !att->data_size)
+        return false;
+    // match against MIME types
+    if (strcmp(att->type, "application/x-truetype-font") == 0
+        || strcmp(att->type, "application/x-font") == 0)
+        return true;
+    // fallback: match against file extension
+    if (strlen(att->name) > 4) {
+        char *ext = att->name + strlen(att->name) - 4;
+        if (strcasecmp(ext, ".ttf") == 0 || strcasecmp(ext, ".ttc") == 0
+            || strcasecmp(ext, ".otf") == 0)
+            return true;
+    }
+    return false;
+}
+
+static void add_subtitle_fonts_from_sources(struct MPContext *mpctx)
+{
+#ifdef CONFIG_ASS
+    if (mpctx->opts->ass_enabled) {
+        for (int j = 0; j < mpctx->num_sources; j++) {
+            struct demuxer *d = mpctx->sources[j];
+            for (int i = 0; i < d->num_attachments; i++) {
+                struct demux_attachment *att = d->attachments + i;
+                if (mpctx->opts->use_embedded_fonts && attachment_is_font(att))
+                    ass_add_font(mpctx->ass_library, att->name, att->data,
+                                 att->data_size);
+            }
+        }
+    }
+#endif
+}
+
+static void init_sub_renderer(struct MPContext *mpctx)
+{
+#ifdef CONFIG_ASS
+    assert(!(mpctx->initialized_flags & INITIALIZED_LIBASS));
+    assert(!mpctx->osd->ass_renderer);
+
+    mpctx->osd->ass_renderer = ass_renderer_init(mpctx->osd->ass_library);
+    if (mpctx->osd->ass_renderer) {
+        mp_ass_configure_fonts(mpctx->osd->ass_renderer,
+                               mpctx->opts->sub_text_style);
+    }
+    mpctx->initialized_flags |= INITIALIZED_LIBASS;
+#endif
+}
+
+static struct mp_resolve_result *resolve_url(const char *filename,
+                                             struct MPOpts *opts)
+{
+    if (!mp_is_url(bstr0(filename)))
+        return NULL;
+#if defined(CONFIG_LIBQUVI) || defined(CONFIG_LIBQUVI9)
+    return mp_resolve_quvi(filename, opts);
+#else
+    return NULL;
+#endif
+}
+
+static void print_resolve_contents(struct mp_log *log,
+                                   struct mp_resolve_result *res)
+{
+    mp_msg_log(log, MSGL_V, "Resolve:\n");
+    mp_msg_log(log, MSGL_V, "  title: %s\n", res->title);
+    mp_msg_log(log, MSGL_V, "  url: %s\n", res->url);
+    for (int n = 0; n < res->num_srcs; n++) {
+        mp_msg_log(log, MSGL_V, "  source %d:\n", n);
+        if (res->srcs[n]->url)
+            mp_msg_log(log, MSGL_V, "    url: %s\n", res->srcs[n]->url);
+        if (res->srcs[n]->encid)
+            mp_msg_log(log, MSGL_V, "    encid: %s\n", res->srcs[n]->encid);
+    }
+    for (int n = 0; n < res->num_subs; n++) {
+        mp_msg_log(log, MSGL_V, "  subtitle %d:\n", n);
+        if (res->subs[n]->url)
+            mp_msg_log(log, MSGL_V, "    url: %s\n", res->subs[n]->url);
+        if (res->subs[n]->lang)
+            mp_msg_log(log, MSGL_V, "    lang: %s\n", res->subs[n]->lang);
+        if (res->subs[n]->data) {
+            mp_msg_log(log, MSGL_V, "    data: %zd bytes\n",
+                       strlen(res->subs[n]->data));
+        }
+    }
+    if (res->playlist) {
+        mp_msg_log(log, MSGL_V, "  playlist with %d entries\n",
+                   playlist_entry_count(res->playlist));
+    }
+}
+
+// Replace the current playlist entry with playlist contents. Moves the entries
+// from the given playlist pl, so the entries don't actually need to be copied.
+static void transfer_playlist(struct MPContext *mpctx, struct playlist *pl)
+{
+    if (mpctx->demuxer->playlist->first) {
+        playlist_transfer_entries(mpctx->playlist, mpctx->demuxer->playlist);
+        if (mpctx->playlist->current)
+            playlist_remove(mpctx->playlist, mpctx->playlist->current);
+    } else {
+        MP_WARN(mpctx, "Empty playlist!\n");
+    }
+}
+
+static void print_timeline(struct MPContext *mpctx)
+{
+    if (mpctx->timeline) {
+        int part_count = mpctx->num_timeline_parts;
+        MP_VERBOSE(mpctx, "Timeline contains %d parts from %d "
+                   "sources. Total length %.3f seconds.\n", part_count,
+                   mpctx->num_sources, mpctx->timeline[part_count].start);
+        MP_VERBOSE(mpctx, "Source files:\n");
+        for (int i = 0; i < mpctx->num_sources; i++)
+            MP_VERBOSE(mpctx, "%d: %s\n", i,
+                       mpctx->sources[i]->filename);
+        MP_VERBOSE(mpctx, "Timeline parts: (number, start, "
+