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3038e578af
mpv/player/playloop.c
sfan5 1201d59f0b various: replace abort() with MP_ASSERT_UNREACHABLE() where appropriate 
In debug mode the macro causes an assertion failure.
In release mode it works differently and tells the compiler that it can
assume the codepath will never execute. For this reason I was conversative
in replacing it, e.g. in mpv-internal code that exhausts all valid values
of an enum or when a condition is clear from directly preceding code.
2023-01-12 22:02:07 +01:00

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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 <assert.h>
#include <inttypes.h>
#include <math.h>
#include <stdbool.h>
#include <stddef.h>
#include "client.h"
#include "command.h"
#include "config.h"
#include "core.h"
#include "mpv_talloc.h"
#include "screenshot.h"
#include "audio/out/ao.h"
#include "common/common.h"
#include "common/encode.h"
#include "common/msg.h"
#include "common/playlist.h"
#include "common/recorder.h"
#include "common/stats.h"
#include "demux/demux.h"
#include "filters/f_decoder_wrapper.h"
#include "filters/filter_internal.h"
#include "input/input.h"
#include "misc/dispatch.h"
#include "options/m_config_frontend.h"
#include "options/m_property.h"
#include "options/options.h"
#include "osdep/terminal.h"
#include "osdep/timer.h"
#include "stream/stream.h"
#include "sub/dec_sub.h"
#include "sub/osd.h"
#include "video/out/vo.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)
{
int processed = 0;
for (;;) {
mp_cmd_t *cmd = mp_input_read_cmd(mpctx->input);
if (!cmd)
break;
run_command(mpctx, cmd, NULL, NULL, NULL);
processed = 1;
}
mp_set_timeout(mpctx, mp_input_get_delay(mpctx->input));
if (processed)
mp_notify(mpctx, MP_EVENT_INPUT_PROCESSED, NULL);
}
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);
}
}
bool get_internal_paused(struct MPContext *mpctx)
{
return mpctx->opts->pause || mpctx->paused_for_cache;
}
// 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 = get_internal_paused(mpctx);
if (internal_paused != mpctx->paused) {
mpctx->paused = internal_paused;
if (mpctx->ao)
ao_set_paused(mpctx->ao, internal_paused);
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
}
}
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) &&
mpctx->opts->stop_screensaver != 2;
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);
}
// May need unpause first
if (mpctx->paused_for_cache)
update_internal_pause_state(mpctx);
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_playback_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: MP_ASSERT_UNREACHABLE();
}
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;
}
MP_ASSERT_UNREACHABLE();
}
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)
{
if (!mpctx->demuxer)
return MP_NOPTS_VALUE;
if (mpctx->playback_pts != MP_NOPTS_VALUE)
return mpctx->playback_pts * mpctx->play_dir;
return mpctx->last_seek_pts;
}
double get_playback_time(struct MPContext *mpctx)
{
double cur = get_current_time(mpctx);
// During seeking, the time corresponds to the last seek time - apply some
// cosmetics to it.
if (cur != MP_NOPTS_VALUE && 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);
if (events & VO_EVENT_FOCUS)
mp_notify(mpctx, MP_EVENT_FOCUS, 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) {
if (!mpctx->shown_aframes && !mpctx->shown_vframes) {
MP_WARN(mpctx, "No media data to loop.\n");
return;
}
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);
mpctx->audio_status = STATUS_EOF;
mpctx->video_status = STATUS_EOF;
}
}
if (opts->keep_open_pause) {
if (mpctx->ao && ao_is_playing(mpctx->ao))
return;
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, MP_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;
struct track *track = mpctx->current_track[0][STREAM_VIDEO];
update_content_type(mpctx, track);
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;
}
audio_start_ao(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_playing_msg_duration ?
opts->osd_playing_msg_duration : 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%s\n",
mpctx->playback_pts, mp_status_str(mpctx->audio_status),
mp_status_str(mpctx->video_status),
get_internal_paused(mpctx) ? " (paused)" : "");
// To avoid strange effects when using relative seeks, especially if
// there are no proper audio & video timestamps (seeks after EOF).
double length = get_time_length(mpctx);
if (mpctx->last_seek_pts != MP_NOPTS_VALUE && length >= 0)
mpctx->last_seek_pts = MPCLAMP(mpctx->last_seek_pts, 0, length);
// 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_ERROR;
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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