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cda8f1613f
mpv/player/playloop.c
wm4 44ad00ba10 player: make unpausing directly after seek work with --keep-open (again) 
Commit fcf0b80dc9 fixed this the first time. Commit 85576f31a9
"accidentally" removed this code again. The commit message justifying
the removal is correct, except it doesn't take other side-effects of the
state machine into account. I obviously didn't remember what exactly
this was about. So add a comment explaining it this time.

Just apply it again; the thing the latter commit fixed still works.

Fixes: #7819
2020-06-10 11:44:47 +02:00

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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/encode.h"
#include "common/recorder.h"
#include "common/stats.h"
#include "filters/f_decoder_wrapper.h"
#include "options/m_config_frontend.h"
#include "options/m_property.h"
#include "common/playlist.h"
#include "input/input.h"
#include "misc/dispatch.h"
#include "osdep/terminal.h"
#include "osdep/timer.h"
#include "audio/out/ao.h"
#include "demux/demux.h"
#include "stream/stream.h"
#include "sub/dec_sub.h"
#include "sub/osd.h"
#include "video/out/vo.h"
#include "core.h"
#include "client.h"
#include "command.h"
#include "screenshot.h"
// Wait until mp_wakeup_core() is called, since the last time
// mp_wait_events() was called.
void mp_wait_events(struct MPContext *mpctx)
{
mp_client_send_property_changes(mpctx);
stats_event(mpctx->stats, "iterations");
bool sleeping = mpctx->sleeptime > 0;
if (sleeping)
MP_STATS(mpctx, "start sleep");
mp_dispatch_queue_process(mpctx->dispatch, mpctx->sleeptime);
mpctx->sleeptime = INFINITY;
if (sleeping)
MP_STATS(mpctx, "end sleep");
}
// Set the timeout used when the playloop goes to sleep. This means the
// playloop will re-run as soon as the timeout elapses (or earlier).
// mp_set_timeout(c, 0) is essentially equivalent to mp_wakeup_core(c).
void mp_set_timeout(struct MPContext *mpctx, double sleeptime)
{
if (mpctx->sleeptime > sleeptime) {
mpctx->sleeptime = sleeptime;
int64_t abstime = mp_add_timeout(mp_time_us(), sleeptime);
mp_dispatch_adjust_timeout(mpctx->dispatch, abstime);
}
}
// Cause the playloop to run. This can be called from any thread. If called
// from within the playloop itself, it will be run immediately again, instead
// of going to sleep in the next mp_wait_events().
void mp_wakeup_core(struct MPContext *mpctx)
{
mp_dispatch_interrupt(mpctx->dispatch);
}
// Opaque callback variant of mp_wakeup_core().
void mp_wakeup_core_cb(void *ctx)
{
struct MPContext *mpctx = ctx;
mp_wakeup_core(mpctx);
}
void mp_core_lock(struct MPContext *mpctx)
{
mp_dispatch_lock(mpctx->dispatch);
}
void mp_core_unlock(struct MPContext *mpctx)
{
mp_dispatch_unlock(mpctx->dispatch);
}
// Process any queued user input.
static void mp_process_input(struct MPContext *mpctx)
{
for (;;) {
mp_cmd_t *cmd = mp_input_read_cmd(mpctx->input);
if (!cmd)
break;
run_command(mpctx, cmd, NULL, NULL, NULL);
}
mp_set_timeout(mpctx, mp_input_get_delay(mpctx->input));
}
double get_relative_time(struct MPContext *mpctx)
{
int64_t new_time = mp_time_us();
int64_t delta = new_time - mpctx->last_time;
mpctx->last_time = new_time;
return delta * 0.000001;
}
void update_core_idle_state(struct MPContext *mpctx)
{
bool eof = mpctx->video_status == STATUS_EOF &&
mpctx->audio_status == STATUS_EOF;
bool active = !mpctx->paused && mpctx->restart_complete &&
!mpctx->stop_play && mpctx->in_playloop && !eof;
if (mpctx->playback_active != active) {
mpctx->playback_active = active;
update_screensaver_state(mpctx);
mp_notify(mpctx, MP_EVENT_CORE_IDLE, NULL);
}
}
// The value passed here is the new value for mpctx->opts->pause
void set_pause_state(struct MPContext *mpctx, bool user_pause)
{
struct MPOpts *opts = mpctx->opts;
opts->pause = user_pause;
bool internal_paused = opts->pause || mpctx->paused_for_cache;
if (internal_paused != mpctx->paused) {
mpctx->paused = internal_paused;
if (mpctx->ao && mpctx->ao_chain) {
if (internal_paused) {
ao_pause(mpctx->ao);
} else {
ao_resume(mpctx->ao);
}
}
if (mpctx->video_out)
vo_set_paused(mpctx->video_out, internal_paused);
mpctx->osd_function = 0;
mpctx->osd_force_update = true;
mp_wakeup_core(mpctx);
if (internal_paused) {
mpctx->step_frames = 0;
mpctx->time_frame -= get_relative_time(mpctx);
} else {
(void)get_relative_time(mpctx); // ignore time that passed during pause
}
// For some reason, these events are supposed to be sent even if only
// the internal pause state changed (and "pause" property didn't)... OK.
mp_notify(mpctx, opts->pause ? MPV_EVENT_PAUSE : MPV_EVENT_UNPAUSE, 0);
}
update_core_idle_state(mpctx);
m_config_notify_change_opt_ptr(mpctx->mconfig, &opts->pause);
}
void update_internal_pause_state(struct MPContext *mpctx)
{
set_pause_state(mpctx, mpctx->opts->pause);
}
void update_screensaver_state(struct MPContext *mpctx)
{
if (!mpctx->video_out)
return;
bool saver_state = !mpctx->playback_active || !mpctx->opts->stop_screensaver;
vo_control_async(mpctx->video_out, saver_state ? VOCTRL_RESTORE_SCREENSAVER
: VOCTRL_KILL_SCREENSAVER, NULL);
}
void add_step_frame(struct MPContext *mpctx, int dir)
{
if (!mpctx->vo_chain)
return;
if (dir > 0) {
mpctx->step_frames += 1;
set_pause_state(mpctx, false);
} else if (dir < 0) {
if (!mpctx->hrseek_active) {
queue_seek(mpctx, MPSEEK_BACKSTEP, 0, MPSEEK_VERY_EXACT, 0);
set_pause_state(mpctx, true);
}
}
}
// Clear some playback-related fields on file loading or after seeks.
void reset_playback_state(struct MPContext *mpctx)
{
mp_filter_reset(mpctx->filter_root);
reset_video_state(mpctx);
reset_audio_state(mpctx);
reset_subtitle_state(mpctx);
for (int n = 0; n < mpctx->num_tracks; n++) {
struct track *t = mpctx->tracks[n];
// (Often, but not always, this is redundant and also done elsewhere.)
if (t->dec)
mp_decoder_wrapper_set_play_dir(t->dec, mpctx->play_dir);
if (t->d_sub)
sub_set_play_dir(t->d_sub, mpctx->play_dir);
}
mpctx->hrseek_active = false;
mpctx->hrseek_lastframe = false;
mpctx->hrseek_backstep = false;
mpctx->current_seek = (struct seek_params){0};
mpctx->playback_pts = MP_NOPTS_VALUE;
mpctx->step_frames = 0;
mpctx->ab_loop_clip = true;
mpctx->restart_complete = false;
mpctx->paused_for_cache = false;
mpctx->cache_buffer = 100;
mpctx->cache_update_pts = MP_NOPTS_VALUE;
encode_lavc_discontinuity(mpctx->encode_lavc_ctx);
update_internal_pause_state(mpctx);
update_core_idle_state(mpctx);
}
static void mp_seek(MPContext *mpctx, struct seek_params seek)
{
struct MPOpts *opts = mpctx->opts;
if (!mpctx->demuxer || !seek.type || seek.amount == MP_NOPTS_VALUE)
return;
bool hr_seek_very_exact = seek.exact == MPSEEK_VERY_EXACT;
double current_time = get_current_time(mpctx);
if (current_time == MP_NOPTS_VALUE && seek.type == MPSEEK_RELATIVE)
return;
if (current_time == MP_NOPTS_VALUE)
current_time = 0;
double seek_pts = MP_NOPTS_VALUE;
int demux_flags = 0;
switch (seek.type) {
case MPSEEK_ABSOLUTE:
seek_pts = seek.amount;
break;
case MPSEEK_BACKSTEP:
seek_pts = current_time;
hr_seek_very_exact = true;
break;
case MPSEEK_RELATIVE:
demux_flags = seek.amount > 0 ? SEEK_FORWARD : 0;
seek_pts = current_time + seek.amount;
break;
case MPSEEK_FACTOR: ;
double len = get_time_length(mpctx);
if (len >= 0)
seek_pts = seek.amount * len;
break;
default: abort();
}
double demux_pts = seek_pts;
bool hr_seek = seek.exact != MPSEEK_KEYFRAME && seek_pts != MP_NOPTS_VALUE &&
(seek.exact >= MPSEEK_EXACT || opts->hr_seek == 1 ||
(opts->hr_seek >= 0 && seek.type == MPSEEK_ABSOLUTE) ||
(opts->hr_seek == 2 && (!mpctx->vo_chain || mpctx->vo_chain->is_sparse)));
if (seek.type == MPSEEK_FACTOR || seek.amount < 0 ||
(seek.type == MPSEEK_ABSOLUTE && seek.amount < mpctx->last_chapter_pts))
mpctx->last_chapter_seek = -2;
// Under certain circumstances, prefer SEEK_FACTOR.
if (seek.type == MPSEEK_FACTOR && !hr_seek &&
(mpctx->demuxer->ts_resets_possible || seek_pts == MP_NOPTS_VALUE))
{
demux_pts = seek.amount;
demux_flags |= SEEK_FACTOR;
}
int play_dir = opts->play_dir;
if (play_dir < 0)
demux_flags |= SEEK_SATAN;
if (hr_seek) {
double hr_seek_offset = opts->hr_seek_demuxer_offset;
// Always try to compensate for possibly bad demuxers in "special"
// situations where we need more robustness from the hr-seek code, even
// if the user doesn't use --hr-seek-demuxer-offset.
// The value is arbitrary, but should be "good enough" in most situations.
if (hr_seek_very_exact)
hr_seek_offset = MPMAX(hr_seek_offset, 0.5); // arbitrary
for (int n = 0; n < mpctx->num_tracks; n++) {
double offset = 0;
if (!mpctx->tracks[n]->is_external)
offset += get_track_seek_offset(mpctx, mpctx->tracks[n]);
hr_seek_offset = MPMAX(hr_seek_offset, -offset);
}
demux_pts -= hr_seek_offset * play_dir;
demux_flags = (demux_flags | SEEK_HR) & ~SEEK_FORWARD;
// For HR seeks in backward playback mode, the correct seek rounding
// direction is forward instead of backward.
if (play_dir < 0)
demux_flags |= SEEK_FORWARD;
}
if (!mpctx->demuxer->seekable)
demux_flags |= SEEK_CACHED;
demux_flags |= SEEK_BLOCK;
if (!demux_seek(mpctx->demuxer, demux_pts, demux_flags)) {
if (!mpctx->demuxer->seekable) {
MP_ERR(mpctx, "Cannot seek in this stream.\n");
MP_ERR(mpctx, "You can force it with '--force-seekable=yes'.\n");
}
return;
}
mpctx->play_dir = play_dir;
// Seek external, extra files too:
for (int t = 0; t < mpctx->num_tracks; t++) {
struct track *track = mpctx->tracks[t];
if (track->selected && track->is_external && track->demuxer) {
double main_new_pos = demux_pts;
if (!hr_seek || track->is_external)
main_new_pos += get_track_seek_offset(mpctx, track);
if (demux_flags & SEEK_FACTOR)
main_new_pos = seek_pts;
demux_seek(track->demuxer, main_new_pos,
demux_flags & (SEEK_SATAN | SEEK_BLOCK));
}
}
if (!(seek.flags & MPSEEK_FLAG_NOFLUSH))
clear_audio_output_buffers(mpctx);
reset_playback_state(mpctx);
if (mpctx->recorder)
mp_recorder_mark_discontinuity(mpctx->recorder);
demux_block_reading(mpctx->demuxer, false);
for (int t = 0; t < mpctx->num_tracks; t++) {
struct track *track = mpctx->tracks[t];
if (track->selected && track->demuxer)
demux_block_reading(track->demuxer, false);
}
/* Use the target time as "current position" for further relative
* seeks etc until a new video frame has been decoded */
mpctx->last_seek_pts = seek_pts;
if (hr_seek) {
mpctx->hrseek_active = true;
mpctx->hrseek_backstep = seek.type == MPSEEK_BACKSTEP;
mpctx->hrseek_pts = seek_pts * mpctx->play_dir;
// allow decoder to drop frames before hrseek_pts
bool hrseek_framedrop = !hr_seek_very_exact && opts->hr_seek_framedrop;
MP_VERBOSE(mpctx, "hr-seek, skipping to %f%s%s\n", mpctx->hrseek_pts,
hrseek_framedrop ? "" : " (no framedrop)",
mpctx->hrseek_backstep ? " (backstep)" : "");
for (int n = 0; n < mpctx->num_tracks; n++) {
struct track *track = mpctx->tracks[n];
struct mp_decoder_wrapper *dec = track->dec;
if (dec && hrseek_framedrop)
mp_decoder_wrapper_set_start_pts(dec, mpctx->hrseek_pts);
}
}
if (mpctx->stop_play == AT_END_OF_FILE)
mpctx->stop_play = KEEP_PLAYING;
mpctx->start_timestamp = mp_time_sec();
mp_wakeup_core(mpctx);
mp_notify(mpctx, MPV_EVENT_SEEK, NULL);
mp_notify(mpctx, MPV_EVENT_TICK, NULL);
update_ab_loop_clip(mpctx);
mpctx->current_seek = seek;
}
// This combines consecutive seek requests.
void queue_seek(struct MPContext *mpctx, enum seek_type type, double amount,
enum seek_precision exact, int flags)
{
struct seek_params *seek = &mpctx->seek;
mp_wakeup_core(mpctx);
if (mpctx->stop_play == AT_END_OF_FILE)
mpctx->stop_play = KEEP_PLAYING;
switch (type) {
case MPSEEK_RELATIVE:
seek->flags |= flags;
if (seek->type == MPSEEK_FACTOR)
return; // Well... not common enough to bother doing better
seek->amount += amount;
seek->exact = MPMAX(seek->exact, exact);
if (seek->type == MPSEEK_NONE)
seek->exact = exact;
if (seek->type == MPSEEK_ABSOLUTE)
return;
seek->type = MPSEEK_RELATIVE;
return;
case MPSEEK_ABSOLUTE:
case MPSEEK_FACTOR:
case MPSEEK_BACKSTEP:
*seek = (struct seek_params) {
.type = type,
.amount = amount,
.exact = exact,
.flags = flags,
};
return;
case MPSEEK_NONE:
*seek = (struct seek_params){ 0 };
return;
}
abort();
}
void execute_queued_seek(struct MPContext *mpctx)
{
if (mpctx->seek.type) {
bool queued_hr_seek = mpctx->seek.exact != MPSEEK_KEYFRAME;
// Let explicitly imprecise seeks cancel precise seeks:
if (mpctx->hrseek_active && !queued_hr_seek)
mpctx->start_timestamp = -1e9;
// If the user seeks continuously (keeps arrow key down) try to finish
// showing a frame from one location before doing another seek (instead
// of never updating the screen).
if ((mpctx->seek.flags & MPSEEK_FLAG_DELAY) &&
mp_time_sec() - mpctx->start_timestamp < 0.3)
{
// Wait until a video frame is available and has been shown.
if (mpctx->video_status < STATUS_PLAYING)
return;
// On A/V hr-seeks, always wait for the full result, to avoid corner
// cases when seeking past EOF (we want it to determine that EOF
// actually happened, instead of overwriting it with the new seek).
if (mpctx->hrseek_active && queued_hr_seek && mpctx->vo_chain &&
mpctx->ao_chain && !mpctx->restart_complete)
return;
}
mp_seek(mpctx, mpctx->seek);
mpctx->seek = (struct seek_params){0};
}
}
// NOPTS (i.e. <0) if unknown
double get_time_length(struct MPContext *mpctx)
{
struct demuxer *demuxer = mpctx->demuxer;
return demuxer && demuxer->duration >= 0 ? demuxer->duration : MP_NOPTS_VALUE;
}
// Return approximate PTS of first frame played. This can be completely wrong
// for a number of reasons in a number of situations.
double get_start_time(struct MPContext *mpctx, int dir)
{
double res = 0;
if (mpctx->demuxer) {
if (!mpctx->opts->rebase_start_time)
res += mpctx->demuxer->start_time;
if (dir < 0)
res += MPMAX(mpctx->demuxer->duration, 0);
}
return res;
}
double get_current_time(struct MPContext *mpctx)
{
struct demuxer *demuxer = mpctx->demuxer;
if (demuxer) {
if (mpctx->playback_pts != MP_NOPTS_VALUE)
return mpctx->playback_pts * mpctx->play_dir;
if (mpctx->last_seek_pts != MP_NOPTS_VALUE)
return mpctx->last_seek_pts;
}
return MP_NOPTS_VALUE;
}
double get_playback_time(struct MPContext *mpctx)
{
double cur = get_current_time(mpctx);
if (cur == MP_NOPTS_VALUE)
return cur;
// During seeking, the time corresponds to the last seek time - apply some
// cosmetics to it.
if (mpctx->playback_pts == MP_NOPTS_VALUE) {
double length = get_time_length(mpctx);
if (length >= 0)
cur = MPCLAMP(cur, 0, length);
}
return cur;
}
// Return playback position in 0.0-1.0 ratio, or -1 if unknown.
double get_current_pos_ratio(struct MPContext *mpctx, bool use_range)
{
struct demuxer *demuxer = mpctx->demuxer;
if (!demuxer)
return -1;
double ans = -1;
double start = 0;
double len = get_time_length(mpctx);
if (use_range) {
double startpos = get_play_start_pts(mpctx);
double endpos = get_play_end_pts(mpctx);
if (endpos > MPMAX(0, len))
endpos = MPMAX(0, len);
if (endpos < startpos)
endpos = startpos;
start = startpos;
len = endpos - startpos;
}
double pos = get_current_time(mpctx);
if (len > 0)
ans = MPCLAMP((pos - start) / len, 0, 1);
if (ans < 0) {
int64_t size = demuxer->filesize;
if (size > 0 && demuxer->filepos >= 0)
ans = MPCLAMP(demuxer->filepos / (double)size, 0, 1);
}
if (use_range) {
if (mpctx->opts->play_frames > 0)
ans = MPMAX(ans, 1.0 -
mpctx->max_frames / (double) mpctx->opts->play_frames);
}
return ans;
}
// 0-100, -1 if unknown
int get_percent_pos(struct MPContext *mpctx)
{
double pos = get_current_pos_ratio(mpctx, false);
return pos < 0 ? -1 : (int)round(pos * 100);
}
// -2 is no chapters, -1 is before first chapter
int get_current_chapter(struct MPContext *mpctx)
{
if (!mpctx->num_chapters)
return -2;
double current_pts = get_current_time(mpctx);
int i;
for (i = 0; i < mpctx->num_chapters; i++)
if (current_pts < mpctx->chapters[i].pts)
break;
return MPMAX(mpctx->last_chapter_seek, i - 1);
}
char *chapter_display_name(struct MPContext *mpctx, int chapter)
{
char *name = chapter_name(mpctx, chapter);
char *dname = NULL;
if (name) {
dname = talloc_asprintf(NULL, "(%d) %s", chapter + 1, name);
} else if (chapter < -1) {
dname = talloc_strdup(NULL, "(unavailable)");
} else {
int chapter_count = get_chapter_count(mpctx);
if (chapter_count <= 0)
dname = talloc_asprintf(NULL, "(%d)", chapter + 1);
else
dname = talloc_asprintf(NULL, "(%d) of %d", chapter + 1,
chapter_count);
}
return dname;
}
// returns NULL if chapter name unavailable
char *chapter_name(struct MPContext *mpctx, int chapter)
{
if (chapter < 0 || chapter >= mpctx->num_chapters)
return NULL;
return mp_tags_get_str(mpctx->chapters[chapter].metadata, "title");
}
// returns the start of the chapter in seconds (NOPTS if unavailable)
double chapter_start_time(struct MPContext *mpctx, int chapter)
{
if (chapter == -1)
return 0;
if (chapter >= 0 && chapter < mpctx->num_chapters)
return mpctx->chapters[chapter].pts;
return MP_NOPTS_VALUE;
}
int get_chapter_count(struct MPContext *mpctx)
{
return mpctx->num_chapters;
}
// If the current playback position (or seek target) falls before the B
// position, actually make playback loop when reaching the B point. The
// intention is that you can seek out of the ab-loop range.
void update_ab_loop_clip(struct MPContext *mpctx)
{
double pts = get_current_time(mpctx);
double ab[2];
mpctx->ab_loop_clip = pts != MP_NOPTS_VALUE &&
get_ab_loop_times(mpctx, ab) &&
pts * mpctx->play_dir <= ab[1] * mpctx->play_dir;
}
static void handle_osd_redraw(struct MPContext *mpctx)
{
if (!mpctx->video_out || !mpctx->video_out->config_ok)
return;
// If we're playing normally, let OSD be redrawn naturally as part of
// video display.
if (!mpctx->paused) {
if (mpctx->sleeptime < 0.1 && mpctx->video_status == STATUS_PLAYING)
return;
}
// Don't redraw immediately during a seek (makes it significantly slower).
bool use_video = mpctx->vo_chain && !mpctx->vo_chain->is_sparse;
if (use_video && mp_time_sec() - mpctx->start_timestamp < 0.1) {
mp_set_timeout(mpctx, 0.1);
return;
}
bool want_redraw = osd_query_and_reset_want_redraw(mpctx->osd) ||
vo_want_redraw(mpctx->video_out);
if (!want_redraw)
return;
vo_redraw(mpctx->video_out);
}
static void clear_underruns(struct MPContext *mpctx)
{
if (mpctx->ao_chain && mpctx->ao_chain->underrun) {
mpctx->ao_chain->underrun = false;
mp_wakeup_core(mpctx);
}
if (mpctx->vo_chain && mpctx->vo_chain->underrun) {
mpctx->vo_chain->underrun = false;
mp_wakeup_core(mpctx);
}
}
static void handle_update_cache(struct MPContext *mpctx)
{
bool force_update = false;
struct MPOpts *opts = mpctx->opts;
if (!mpctx->demuxer || mpctx->encode_lavc_ctx) {
clear_underruns(mpctx);
return;
}
double now = mp_time_sec();
struct demux_reader_state s;
demux_get_reader_state(mpctx->demuxer, &s);
mpctx->demux_underrun |= s.underrun;
int cache_buffer = 100;
bool use_pause_on_low_cache = opts->cache_pause && mpctx->play_dir > 0;
if (!mpctx->restart_complete) {
// Audio or video is restarting, and initial buffering is enabled. Make
// sure we actually restart them in paused mode, so no audio gets
// dropped and video technically doesn't start yet.
use_pause_on_low_cache &= opts->cache_pause_initial &&
(mpctx->video_status == STATUS_READY ||
mpctx->audio_status == STATUS_READY);
}
bool is_low = use_pause_on_low_cache && !s.idle &&
s.ts_duration < opts->cache_pause_wait;
// Enter buffering state only if there actually was an underrun (or if
// initial caching before playback restart is used).
bool need_wait = is_low;
if (is_low && !mpctx->paused_for_cache && mpctx->restart_complete) {
// Wait only if an output underrun was registered. (Or if there is no
// underrun detection.)
bool output_underrun = false;
if (mpctx->ao_chain)
output_underrun |= mpctx->ao_chain->underrun;
if (mpctx->vo_chain)
output_underrun |= mpctx->vo_chain->underrun;
// Output underruns could be sporadic (unrelated to demuxer buffer state
// and for example caused by slow decoding), so use a past demuxer
// underrun as indication that the underrun was possibly due to a
// demuxer underrun.
need_wait = mpctx->demux_underrun && output_underrun;
}
// Let the underrun flag "stick" around until the cache has fully recovered.
// See logic where demux_underrun is used.
if (!is_low)
mpctx->demux_underrun = false;
if (mpctx->paused_for_cache != need_wait) {
mpctx->paused_for_cache = need_wait;
update_internal_pause_state(mpctx);
force_update = true;
if (mpctx->paused_for_cache)
mpctx->cache_stop_time = now;
}
if (!mpctx->paused_for_cache)
clear_underruns(mpctx);
if (mpctx->paused_for_cache) {
cache_buffer =
100 * MPCLAMP(s.ts_duration / opts->cache_pause_wait, 0, 0.99);
mp_set_timeout(mpctx, 0.2);
}
// Also update cache properties.
bool busy = !s.idle;
if (fabs(mpctx->cache_update_pts - mpctx->playback_pts) >= 1.0)
busy = true;
if (busy || mpctx->next_cache_update > 0) {
if (mpctx->next_cache_update <= now) {
mpctx->next_cache_update = busy ? now + 0.25 : 0;
force_update = true;
}
if (mpctx->next_cache_update > 0)
mp_set_timeout(mpctx, mpctx->next_cache_update - now);
}
if (mpctx->cache_buffer != cache_buffer) {
if ((mpctx->cache_buffer == 100) != (cache_buffer == 100)) {
if (cache_buffer < 100) {
MP_VERBOSE(mpctx, "Enter buffering (buffer went from %d%% -> %d%%) [%fs].\n",
mpctx->cache_buffer, cache_buffer, s.ts_duration);
} else {
double t = now - mpctx->cache_stop_time;
MP_VERBOSE(mpctx, "End buffering (waited %f secs) [%fs].\n",
t, s.ts_duration);
}
} else {
MP_VERBOSE(mpctx, "Still buffering (buffer went from %d%% -> %d%%) [%fs].\n",
mpctx->cache_buffer, cache_buffer, s.ts_duration);
}
mpctx->cache_buffer = cache_buffer;
force_update = true;
}
if (s.eof && !busy)
prefetch_next(mpctx);
if (force_update) {
mpctx->cache_update_pts = mpctx->playback_pts;
mp_notify(mpctx, MP_EVENT_CACHE_UPDATE, NULL);
}
}
int get_cache_buffering_percentage(struct MPContext *mpctx)
{
return mpctx->demuxer ? mpctx->cache_buffer : -1;
}
static void handle_cursor_autohide(struct MPContext *mpctx)
{
struct MPOpts *opts = mpctx->opts;
struct vo *vo = mpctx->video_out;
if (!vo)
return;
bool mouse_cursor_visible = mpctx->mouse_cursor_visible;
double now = mp_time_sec();
unsigned mouse_event_ts = mp_input_get_mouse_event_counter(mpctx->input);
if (mpctx->mouse_event_ts != mouse_event_ts) {
mpctx->mouse_event_ts = mouse_event_ts;
mpctx->mouse_timer = now + opts->cursor_autohide_delay / 1000.0;
mouse_cursor_visible = true;
}
if (mpctx->mouse_timer > now) {
mp_set_timeout(mpctx, mpctx->mouse_timer - now);
} else {
mouse_cursor_visible = false;
}
if (opts->cursor_autohide_delay == -1)
mouse_cursor_visible = true;
if (opts->cursor_autohide_delay == -2)
mouse_cursor_visible = false;
if (opts->cursor_autohide_fs && !opts->vo->fullscreen)
mouse_cursor_visible = true;
if (mouse_cursor_visible != mpctx->mouse_cursor_visible)
vo_control(vo, VOCTRL_SET_CURSOR_VISIBILITY, &mouse_cursor_visible);
mpctx->mouse_cursor_visible = mouse_cursor_visible;
}
static void handle_vo_events(struct MPContext *mpctx)
{
struct vo *vo = mpctx->video_out;
int events = vo ? vo_query_and_reset_events(vo, VO_EVENTS_USER) : 0;
if (events & VO_EVENT_RESIZE)
mp_notify(mpctx, MP_EVENT_WIN_RESIZE, NULL);
if (events & VO_EVENT_WIN_STATE)
mp_notify(mpctx, MP_EVENT_WIN_STATE, NULL);
if (events & VO_EVENT_DPI)
mp_notify(mpctx, MP_EVENT_WIN_STATE2, NULL);
}
static void handle_sstep(struct MPContext *mpctx)
{
struct MPOpts *opts = mpctx->opts;
if (mpctx->stop_play || !mpctx->restart_complete)
return;
if (opts->step_sec > 0 && !mpctx->paused) {
set_osd_function(mpctx, OSD_FFW);
queue_seek(mpctx, MPSEEK_RELATIVE, opts->step_sec, MPSEEK_DEFAULT, 0);
}
if (mpctx->video_status >= STATUS_EOF) {
if (mpctx->max_frames >= 0 && !mpctx->stop_play)
mpctx->stop_play = AT_END_OF_FILE; // force EOF even if audio left
if (mpctx->step_frames > 0 && !mpctx->paused)
set_pause_state(mpctx, true);
}
}
static void handle_loop_file(struct MPContext *mpctx)
{
struct MPOpts *opts = mpctx->opts;
if (mpctx->stop_play != AT_END_OF_FILE)
return;
double target = MP_NOPTS_VALUE;
enum seek_precision prec = MPSEEK_DEFAULT;
double ab[2];
if (get_ab_loop_times(mpctx, ab) && mpctx->ab_loop_clip) {
if (opts->ab_loop_count > 0) {
opts->ab_loop_count--;
m_config_notify_change_opt_ptr(mpctx->mconfig, &opts->ab_loop_count);
}
target = ab[0];
prec = MPSEEK_EXACT;
} else if (opts->loop_file) {
if (opts->loop_file > 0) {
opts->loop_file--;
m_config_notify_change_opt_ptr(mpctx->mconfig, &opts->loop_file);
}
target = get_start_time(mpctx, mpctx->play_dir);
}
if (target != MP_NOPTS_VALUE) {
mpctx->stop_play = KEEP_PLAYING;
set_osd_function(mpctx, OSD_FFW);
mark_seek(mpctx);
// Assumes execute_queued_seek() happens before next audio/video is
// attempted to be decoded or filtered.
queue_seek(mpctx, MPSEEK_ABSOLUTE, target, prec, MPSEEK_FLAG_NOFLUSH);
}
}
void seek_to_last_frame(struct MPContext *mpctx)
{
if (!mpctx->vo_chain)
return;
if (mpctx->hrseek_lastframe) // exit if we already tried this
return;
MP_VERBOSE(mpctx, "seeking to last frame...\n");
// Approximately seek close to the end of the file.
// Usually, it will seek some seconds before end.
double end = MP_NOPTS_VALUE;
if (mpctx->play_dir > 0) {
end = get_play_end_pts(mpctx);
if (end == MP_NOPTS_VALUE)
end = get_time_length(mpctx);
} else {
end = get_start_time(mpctx, 1);
}
mp_seek(mpctx, (struct seek_params){
.type = MPSEEK_ABSOLUTE,
.amount = end,
.exact = MPSEEK_VERY_EXACT,
});
// Make it exact: stop seek only if last frame was reached.
if (mpctx->hrseek_active) {
mpctx->hrseek_pts = INFINITY * mpctx->play_dir;
mpctx->hrseek_lastframe = true;
}
}
static void handle_keep_open(struct MPContext *mpctx)
{
struct MPOpts *opts = mpctx->opts;
if (opts->keep_open && mpctx->stop_play == AT_END_OF_FILE &&
(opts->keep_open == 2 || !playlist_get_next(mpctx->playlist, 1)) &&
opts->loop_times == 1)
{
mpctx->stop_play = KEEP_PLAYING;
if (mpctx->vo_chain) {
if (!vo_has_frame(mpctx->video_out)) // EOF not reached normally
seek_to_last_frame(mpctx);
}
if (opts->keep_open_pause) {
if (mpctx->ao)
ao_drain(mpctx->ao);
set_pause_state(mpctx, true);
}
}
}
static void handle_chapter_change(struct MPContext *mpctx)
{
int chapter = get_current_chapter(mpctx);
if (chapter != mpctx->last_chapter) {
mpctx->last_chapter = chapter;
mp_notify(mpctx, MPV_EVENT_CHAPTER_CHANGE, NULL);
}
}
// Execute a forceful refresh of the VO window. This clears the window from
// the previous video. It also creates/destroys the VO on demand.
// It tries to make the change only in situations where the window is
// definitely needed or not needed, or if the force parameter is set (the
// latter also decides whether to clear an existing window, because there's
// no way to know if this has already been done or not).
int handle_force_window(struct MPContext *mpctx, bool force)
{
// True if we're either in idle mode, or loading of the file has finished.
// It's also set via force in some stages during file loading.
bool act = mpctx->stop_play || mpctx->playback_initialized || force;
// On the other hand, if a video track is selected, but no video is ever
// decoded on it, then create the window.
bool stalled_video = mpctx->playback_initialized && mpctx->restart_complete &&
mpctx->video_status == STATUS_EOF && mpctx->vo_chain &&
!mpctx->video_out->config_ok;
// Don't interfere with real video playback
if (mpctx->vo_chain && !stalled_video)
return 0;
if (!mpctx->opts->force_vo) {
if (act && !mpctx->vo_chain)
uninit_video_out(mpctx);
return 0;
}
if (mpctx->opts->force_vo != 2 && !act)
return 0;
if (!mpctx->video_out) {
struct vo_extra ex = {
.input_ctx = mpctx->input,
.osd = mpctx->osd,
.encode_lavc_ctx = mpctx->encode_lavc_ctx,
.wakeup_cb = mp_wakeup_core_cb,
.wakeup_ctx = mpctx,
};
mpctx->video_out = init_best_video_out(mpctx->global, &ex);
if (!mpctx->video_out)
goto err;
mpctx->mouse_cursor_visible = true;
}
if (!mpctx->video_out->config_ok || force) {
struct vo *vo = mpctx->video_out;
// Pick whatever works
int config_format = 0;
uint8_t fmts[IMGFMT_END - IMGFMT_START] = {0};
vo_query_formats(vo, fmts);
for (int fmt = IMGFMT_START; fmt < IMGFMT_END; fmt++) {
if (fmts[fmt - IMGFMT_START]) {
config_format = fmt;
break;
}
}
int w = 960;
int h = 480;
struct mp_image_params p = {
.imgfmt = config_format,
.w = w, .h = h,
.p_w = 1, .p_h = 1,
};
if (vo_reconfig(vo, &p) < 0)
goto err;
update_screensaver_state(mpctx);
vo_set_paused(vo, true);
vo_redraw(vo);
mp_notify(mpctx, MPV_EVENT_VIDEO_RECONFIG, NULL);
}
return 0;
err:
mpctx->opts->force_vo = 0;
m_config_notify_change_opt_ptr(mpctx->mconfig, &mpctx->opts->force_vo);
uninit_video_out(mpctx);
MP_FATAL(mpctx, "Error opening/initializing the VO window.\n");
return -1;
}
// Potentially needed by some Lua scripts, which assume TICK always comes.
static void handle_dummy_ticks(struct MPContext *mpctx)
{
if ((mpctx->video_status != STATUS_PLAYING &&
mpctx->video_status != STATUS_DRAINING) ||
mpctx->paused)
{
if (mp_time_sec() - mpctx->last_idle_tick > 0.050) {
mpctx->last_idle_tick = mp_time_sec();
mp_notify(mpctx, MPV_EVENT_TICK, NULL);
}
}
}
// Update current playback time.
static void handle_playback_time(struct MPContext *mpctx)
{
if (mpctx->vo_chain &&
!mpctx->vo_chain->is_sparse &&
mpctx->video_status >= STATUS_PLAYING &&
mpctx->video_status < STATUS_EOF)
{
mpctx->playback_pts = mpctx->video_pts;
} else if (mpctx->audio_status >= STATUS_PLAYING &&
mpctx->audio_status < STATUS_EOF)
{
mpctx->playback_pts = playing_audio_pts(mpctx);
} else if (mpctx->video_status == STATUS_EOF &&
mpctx->audio_status == STATUS_EOF)
{
double apts =
mpctx->ao_chain ? mpctx->ao_chain->last_out_pts : MP_NOPTS_VALUE;
double vpts = mpctx->video_pts;
double mpts = MP_PTS_MAX(apts, vpts);
if (mpts != MP_NOPTS_VALUE)
mpctx->playback_pts = mpts;
}
}
// We always make sure audio and video buffers are filled before actually
// starting playback. This code handles starting them at the same time.
static void handle_playback_restart(struct MPContext *mpctx)
{
struct MPOpts *opts = mpctx->opts;
if (mpctx->audio_status < STATUS_READY ||
mpctx->video_status < STATUS_READY)
return;
handle_update_cache(mpctx);
if (mpctx->video_status == STATUS_READY) {
mpctx->video_status = STATUS_PLAYING;
get_relative_time(mpctx);
mp_wakeup_core(mpctx);
MP_DBG(mpctx, "starting video playback\n");
}
if (mpctx->audio_status == STATUS_READY) {
// If a new seek is queued while the current one finishes, don't
// actually play the audio, but resume seeking immediately.
if (mpctx->seek.type && mpctx->video_status == STATUS_PLAYING) {
handle_playback_time(mpctx);
mpctx->seek.flags &= ~MPSEEK_FLAG_DELAY; // immediately
execute_queued_seek(mpctx);
return;
}
MP_DBG(mpctx, "starting audio playback\n");
mpctx->audio_status = STATUS_PLAYING;
fill_audio_out_buffers(mpctx); // actually play prepared buffer
mp_wakeup_core(mpctx);
}
if (!mpctx->restart_complete) {
mpctx->hrseek_active = false;
mpctx->restart_complete = true;
mpctx->current_seek = (struct seek_params){0};
handle_playback_time(mpctx);
mp_notify(mpctx, MPV_EVENT_PLAYBACK_RESTART, NULL);
update_core_idle_state(mpctx);
if (!mpctx->playing_msg_shown) {
if (opts->playing_msg && opts->playing_msg[0]) {
char *msg =
mp_property_expand_escaped_string(mpctx, opts->playing_msg);
struct mp_log *log = mp_log_new(NULL, mpctx->log, "!term-msg");
mp_info(log, "%s\n", msg);
talloc_free(log);
talloc_free(msg);
}
if (opts->osd_playing_msg && opts->osd_playing_msg[0]) {
char *msg =
mp_property_expand_escaped_string(mpctx, opts->osd_playing_msg);
set_osd_msg(mpctx, 1, opts->osd_duration, "%s", msg);
talloc_free(msg);
}
}
mpctx->playing_msg_shown = true;
mp_wakeup_core(mpctx);
update_ab_loop_clip(mpctx);
MP_VERBOSE(mpctx, "playback restart complete @ %f, audio=%s, video=%s\n",
mpctx->playback_pts, mp_status_str(mpctx->video_status),
mp_status_str(mpctx->audio_status));
// Continuous seeks past EOF => treat as EOF instead of repeating seek.
if (mpctx->seek.type == MPSEEK_RELATIVE && mpctx->seek.amount > 0 &&
mpctx->video_status == STATUS_EOF &&
mpctx->audio_status == STATUS_EOF)
mpctx->seek = (struct seek_params){0};
}
}
static void handle_eof(struct MPContext *mpctx)
{
if (mpctx->seek.type)
return; // for proper keep-open operation
/* Don't quit while paused and we're displaying the last video frame. On the
* other hand, if we don't have a video frame, then the user probably seeked
* outside of the video, and we do want to quit. */
bool prevent_eof =
mpctx->paused && mpctx->video_out && vo_has_frame(mpctx->video_out);
/* It's possible for the user to simultaneously switch both audio
* and video streams to "disabled" at runtime. Handle this by waiting
* rather than immediately stopping playback due to EOF.
*/
if ((mpctx->ao_chain || mpctx->vo_chain) && !prevent_eof &&
mpctx->audio_status == STATUS_EOF &&
mpctx->video_status == STATUS_EOF &&
!mpctx->stop_play)
{
mpctx->stop_play = AT_END_OF_FILE;
}
}
void run_playloop(struct MPContext *mpctx)
{
if (encode_lavc_didfail(mpctx->encode_lavc_ctx)) {
mpctx->stop_play = PT_QUIT;
return;
}
update_demuxer_properties(mpctx);
handle_cursor_autohide(mpctx);
handle_vo_events(mpctx);
handle_command_updates(mpctx);
if (mpctx->lavfi && mp_filter_has_failed(mpctx->lavfi))
mpctx->stop_play = AT_END_OF_FILE;
fill_audio_out_buffers(mpctx);
write_video(mpctx);
handle_playback_restart(mpctx);
handle_playback_time(mpctx);
handle_dummy_ticks(mpctx);
update_osd_msg(mpctx);
if (mpctx->video_status == STATUS_EOF)
update_subtitles(mpctx, mpctx->playback_pts);
handle_each_frame_screenshot(mpctx);
handle_eof(mpctx);
handle_loop_file(mpctx);
handle_keep_open(mpctx);
handle_sstep(mpctx);
update_core_idle_state(mpctx);
execute_queued_seek(mpctx);
if (mpctx->stop_play)
return;
handle_osd_redraw(mpctx);
if (mp_filter_graph_run(mpctx->filter_root))
mp_wakeup_core(mpctx);
mp_wait_events(mpctx);
handle_update_cache(mpctx);
mp_process_input(mpctx);
handle_chapter_change(mpctx);
handle_force_window(mpctx, false);
}
void mp_idle(struct MPContext *mpctx)
{
handle_dummy_ticks(mpctx);
mp_wait_events(mpctx);
mp_process_input(mpctx);
handle_command_updates(mpctx);
handle_update_cache(mpctx);
handle_cursor_autohide(mpctx);
handle_vo_events(mpctx);
update_osd_msg(mpctx);
handle_osd_redraw(mpctx);
}
// Waiting for the slave master to send us a new file to play.
void idle_loop(struct MPContext *mpctx)
{
// ================= idle loop (STOP state) =========================
bool need_reinit = true;
while (mpctx->opts->player_idle_mode && mpctx->stop_play == PT_STOP) {
if (need_reinit) {
uninit_audio_out(mpctx);
handle_force_window(mpctx, true);
mp_wakeup_core(mpctx);
mp_notify(mpctx, MPV_EVENT_IDLE, NULL);
need_reinit = false;
}
mp_idle(mpctx);
}
}
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