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dd547ddcc2
mpv/player/playloop.c
Dudemanguy911 dd547ddcc2 playloop: don't read playback pos from byte stream 
If a file format supports PTS resets, get_current_pos_ratio calculates
the ratio using the stored filepos in the demuxer struct instead of a
standard query of the current time in the stream and its total length.
This seems like a reasonable way to avoid weird PTS values, but in
reality this just causes problems and results in inaccurate ratio
values that can affect other parts of the player (most notably the osc
seekbar).

For libavformat formats, demux->filepos is obtained from the
demux_lavf_fill_buffer function which is called on the next packet. The
problem is that there is a slight delay between packets and in some
cases, this delay can be relatively large. That means the obtained
demuxer->filepos value will be very inaccurate since it obtains the pos
from the end of the upcoming packet and not its actual current position.

This is especially noticeable at the very beginning of playback where
get_current_pos_ratio sometimes returns a value of well over 2% despite
less than a second passing in the stream. Another telltale sign is to
simply watch the osc seekbar as a stream progresses and observe how it
loads in staggered steps as every packet is decoded. In contrast, the
seekbar progresses smoothly on the playback of a format that does not
support PTS resets. The simple solution is to instead use the query of
the current time and length of a stream and calculate the ratio that
way.

get_current_pos_ratio will still fallback on using the byte stream
position if the previous queries fail. However, get_current_time will
be more accurate in the vast majority of cases and should be the
preferred method of calculating the position ratio.
2019-09-21 15:49:28 +00:00

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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 "filters/f_decoder_wrapper.h"
#include "options/m_config.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"
// Wait until mp_wakeup_core() is called, since the last time
// mp_wait_events() was called.
void mp_wait_events(struct MPContext *mpctx)
{
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 input, whether it's user input, or requests from client
// API threads. This also resets the "wakeup" flag used with mp_wait_events().
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;
bool send_update = false;
if (opts->pause != user_pause)
send_update = true;
opts->pause = user_pause;
bool internal_paused = opts->pause || mpctx->paused_for_cache;
if (internal_paused != mpctx->paused) {
mpctx->paused = internal_paused;
send_update = true;
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
}
}
update_core_idle_state(mpctx);
if (send_update)
mp_notify(mpctx, opts->pause ? MPV_EVENT_PAUSE : MPV_EVENT_UNPAUSE, 0);
}
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)
t->dec->play_dir = 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->seek_slave = NULL;
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 = opts->correct_pts && seek.exact != MPSEEK_KEYFRAME &&
((opts->hr_seek == 0 && seek.type == MPSEEK_ABSOLUTE) ||
opts->hr_seek > 0 || seek.exact >= MPSEEK_EXACT) &&
seek_pts != MP_NOPTS_VALUE;
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;
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:
bool has_video = false;
struct track *external_audio = NULL;
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);
if (track->type == STREAM_AUDIO && !external_audio)
external_audio = track;
}
if (track->selected && !track->is_external && track->stream &&
track->type == STREAM_VIDEO && !track->stream->attached_picture)
has_video = true;
}
if (!(seek.flags & MPSEEK_FLAG_NOFLUSH))
clear_audio_output_buffers(mpctx);
reset_playback_state(mpctx);
if (mpctx->recorder)
mp_recorder_mark_discontinuity(mpctx->recorder);
// When doing keyframe seeks (hr_seek=false) backwards (no SEEK_FORWARD),
// then video can seek before the external audio track (because video seek
// granularity is coarser than audio). The result would be playing video with
// silence until the audio seek target is reached. Work around by blocking
// the demuxer (decoders can't read) and seeking to video position later.
if (has_video && external_audio && !hr_seek && mpctx->play_dir > 0 &&
!(demux_flags & SEEK_FORWARD))
{
MP_VERBOSE(mpctx, "delayed seek for aid=%d\n", external_audio->user_tid);
demux_block_reading(external_audio->demuxer, true);
mpctx->seek_slave = external_audio;
}
/* 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) {
// Let explicitly imprecise seeks cancel precise seeks:
if (mpctx->hrseek_active && mpctx->seek.exact == MPSEEK_KEYFRAME)
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 (which could lead to unchanging display). */
bool delay = mpctx->seek.flags & MPSEEK_FLAG_DELAY;
if (delay && mpctx->video_status < STATUS_PLAYING &&
mp_time_sec() - mpctx->start_timestamp < 0.3)
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 : 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_coverart;
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 handle_update_cache(struct MPContext *mpctx)
{
bool force_update = false;
struct MPOpts *opts = mpctx->opts;
if (!mpctx->demuxer)
return;
double now = mp_time_sec();
struct demux_reader_state s;
demux_get_reader_state(mpctx->demuxer, &s);
int cache_buffer = 100;
bool use_pause_on_low_cache = demux_is_network_cached(mpctx->demuxer) &&
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).
if (is_low && !mpctx->paused_for_cache && mpctx->restart_complete)
is_low = s.underrun;
if (mpctx->paused_for_cache != is_low) {
mpctx->paused_for_cache = is_low;
update_internal_pause_state(mpctx);
force_update = true;
if (is_low)
mpctx->cache_stop_time = now;
}
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 (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)
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_FULLSCREEN_STATE) {
// The only purpose of this is to update the fullscreen flag on the
// playloop side if it changes "from outside" on the VO.
int fs = mpctx->opts->vo->fullscreen;
vo_control(vo, VOCTRL_GET_FULLSCREEN, &fs);
m_config_set_option_raw_direct(mpctx->mconfig,
m_config_get_co(mpctx->mconfig, bstr0("fullscreen")), &fs, 0);
}
}
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) {
target = ab[0];
prec = MPSEEK_EXACT;
} else if (opts->loop_file) {
if (opts->loop_file > 0)
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);
mpctx->playback_pts = mpctx->last_vo_pts;
}
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;
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_coverart &&
!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);
}
}
static void handle_delayed_audio_seek(struct MPContext *mpctx)
{
if (mpctx->seek_slave) {
if (mpctx->video_pts != MP_NOPTS_VALUE) {
// We know the video position now, so seek external audio to the
// correct position.
double pts = mpctx->video_pts +
get_track_seek_offset(mpctx, mpctx->seek_slave);
demux_seek(mpctx->seek_slave->demuxer, pts, 0);
mpctx->seek_slave = NULL;
} else if (mpctx->video_status >= STATUS_EOF) {
// We won't get a video position; don't stall the audio stream.
demux_block_reading(mpctx->seek_slave->demuxer, false);
mpctx->seek_slave = NULL;
}
}
}
// 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;
// Do not wait for video stream if it only has sparse frames.
if (mpctx->vo_chain && mpctx->vo_chain->is_sparse &&
mpctx->video_status < STATUS_READY)
{
mpctx->video_status = STATUS_READY;
}
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);
}
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);
execute_queued_seek(mpctx);
return;
}
// Video needed, but not started yet -> wait.
if (mpctx->vo_chain &&
!mpctx->vo_chain->is_coverart &&
!mpctx->vo_chain->is_sparse &&
mpctx->video_status <= STATUS_READY)
return;
MP_VERBOSE(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\n", mpctx->playback_pts);
}
}
static void handle_eof(struct MPContext *mpctx)
{
/* 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_delayed_audio_seek(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_eof(mpctx);
handle_loop_file(mpctx);
handle_keep_open(mpctx);
handle_sstep(mpctx);
update_core_idle_state(mpctx);
if (mpctx->stop_play)
return;
handle_osd_redraw(mpctx);
if (mp_filter_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);
execute_queued_seek(mpctx);
}
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->playlist->current
&& mpctx->stop_play != PT_QUIT)
{
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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