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mpv/player/playloop.c

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/*
* This file is part of MPlayer.
*
* MPlayer is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* MPlayer is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with MPlayer; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#include <stddef.h>
#include <stdbool.h>
#include <inttypes.h>
#include <math.h>
#include <assert.h>
#include "config.h"
#include "talloc.h"
#include "common/msg.h"
#include "options/options.h"
#include "common/common.h"
#include "common/encode.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/mixer.h"
#include "audio/decode/dec_audio.h"
#include "audio/filter/af.h"
#include "audio/out/ao.h"
#include "demux/demux.h"
#include "stream/stream.h"
#include "sub/osd.h"
#include "video/filter/vf.h"
#include "video/decode/dec_video.h"
#include "video/out/vo.h"
#include "core.h"
#include "screenshot.h"
#include "command.h"
#define WAKEUP_PERIOD 0.5
static const char av_desync_help_text[] =
"\n\n"
" *************************************************\n"
" **** Audio/Video desynchronisation detected! ****\n"
" *************************************************\n\n"
"This means either the audio or the video is played too slowly.\n"
"Possible reasons, problems, workarounds:\n"
"- Your system is simply too slow for this file.\n"
" Transcode it to a lower bitrate file with tools like HandBrake.\n"
"- Broken/buggy _audio_ driver.\n"
" Experiment with different values for --autosync, 30 is a good start.\n"
" If you have PulseAudio, try --ao=alsa .\n"
"- Slow video output.\n"
" Try a different --vo driver (--vo=help for a list) or try --framedrop!\n"
"- Playing a video file with --vo=opengl with higher FPS than the monitor.\n"
" This is due to vsync limiting the framerate.\n"
"- Playing from a slow network source.\n"
" Download the file instead.\n"
"- Try to find out whether audio/video/subs are causing this by experimenting\n"
" with --no-video, --no-audio, or --no-sub.\n"
"- If you swiched audio or video tracks, try seeking to force synchronization.\n"
"If none of this helps you, file a bug report.\n\n";
void pause_player(struct MPContext *mpctx)
{
mpctx->opts->pause = 1;
if (mpctx->video_out)
vo_control(mpctx->video_out, VOCTRL_RESTORE_SCREENSAVER, NULL);
if (mpctx->paused)
goto end;
mpctx->paused = true;
mpctx->step_frames = 0;
mpctx->time_frame -= get_relative_time(mpctx);
mpctx->osd_function = 0;
mpctx->paused_for_cache = false;
if (mpctx->video_out && mpctx->d_video && mpctx->video_out->config_ok)
vo_control(mpctx->video_out, VOCTRL_PAUSE, NULL);
if (mpctx->ao && mpctx->d_audio)
ao_pause(mpctx->ao); // pause audio, keep data if possible
// Only print status if there's actually a file being played.
if (mpctx->num_sources)
print_status(mpctx);
end:
mp_notify(mpctx, mpctx->opts->pause ? MPV_EVENT_PAUSE : MPV_EVENT_UNPAUSE, 0);
}
void unpause_player(struct MPContext *mpctx)
{
mpctx->opts->pause = 0;
if (mpctx->video_out && mpctx->opts->stop_screensaver)
vo_control(mpctx->video_out, VOCTRL_KILL_SCREENSAVER, NULL);
if (!mpctx->paused)
goto end;
// Don't actually unpause while cache is loading.
if (mpctx->paused_for_cache)
goto end;
mpctx->paused = false;
mpctx->osd_function = 0;
if (mpctx->ao && mpctx->d_audio)
ao_resume(mpctx->ao);
if (mpctx->video_out && mpctx->d_video && mpctx->video_out->config_ok)
vo_control(mpctx->video_out, VOCTRL_RESUME, NULL); // resume video
(void)get_relative_time(mpctx); // ignore time that passed during pause
end:
mp_notify(mpctx, mpctx->opts->pause ? MPV_EVENT_PAUSE : MPV_EVENT_UNPAUSE, 0);
}
static void draw_osd(struct MPContext *mpctx)
{
struct vo *vo = mpctx->video_out;
osd_set_vo_pts(mpctx->osd, mpctx->video_pts);
vo_draw_osd(vo, mpctx->osd);
}
static bool redraw_osd(struct MPContext *mpctx)
{
struct vo *vo = mpctx->video_out;
if (vo_redraw_frame(vo) < 0)
return false;
draw_osd(mpctx);
vo_flip_page(vo, 0, -1);
return true;
}
void add_step_frame(struct MPContext *mpctx, int dir)
{
if (!mpctx->d_video)
return;
if (dir > 0) {
mpctx->step_frames += 1;
unpause_player(mpctx);
} else if (dir < 0) {
if (!mpctx->backstep_active && !mpctx->hrseek_active) {
mpctx->backstep_active = true;
mpctx->backstep_start_seek_ts = mpctx->vo_pts_history_seek_ts;
pause_player(mpctx);
}
}
}
static void seek_reset(struct MPContext *mpctx, bool reset_ao, bool reset_ac)
{
if (mpctx->d_video) {
video_reset_decoding(mpctx->d_video);
vo_seek_reset(mpctx->video_out);
}
if (mpctx->d_audio && reset_ac) {
audio_reset_decoding(mpctx->d_audio);
if (reset_ao)
clear_audio_output_buffers(mpctx);
}
reset_subtitles(mpctx, 0);
reset_subtitles(mpctx, 1);
mpctx->video_pts = MP_NOPTS_VALUE;
mpctx->video_next_pts = MP_NOPTS_VALUE;
mpctx->playing_last_frame = false;
mpctx->last_frame_duration = 0;
mpctx->delay = 0;
mpctx->time_frame = 0;
mpctx->restart_playback = true;
mpctx->hrseek_active = false;
mpctx->hrseek_framedrop = false;
mpctx->total_avsync_change = 0;
mpctx->drop_frame_cnt = 0;
mpctx->dropped_frames = 0;
mpctx->playback_pts = MP_NOPTS_VALUE;
mpctx->eof_reached = false;
#if HAVE_ENCODING
encode_lavc_discontinuity(mpctx->encode_lavc_ctx);
#endif
mp_notify(mpctx, MPV_EVENT_SEEK, NULL);
}
// return -1 if seek failed (non-seekable stream?), 0 otherwise
static int mp_seek(MPContext *mpctx, struct seek_params seek,
bool timeline_fallthrough)
{
struct MPOpts *opts = mpctx->opts;
uint64_t prev_seek_ts = mpctx->vo_pts_history_seek_ts;
if (!mpctx->demuxer)
return -1;
if (!mpctx->demuxer->seekable) {
MP_ERR(mpctx, "Can't seek in this file.\n");
return -1;
}
if (mpctx->stop_play == AT_END_OF_FILE)
mpctx->stop_play = KEEP_PLAYING;
double hr_seek_offset = opts->hr_seek_demuxer_offset;
bool hr_seek_very_exact = seek.exact > 1;
// 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
bool hr_seek = mpctx->demuxer->accurate_seek && opts->correct_pts;
hr_seek &= seek.exact >= 0 && seek.type != MPSEEK_FACTOR;
hr_seek &= (opts->hr_seek == 0 && seek.type == MPSEEK_ABSOLUTE) ||
opts->hr_seek > 0 || seek.exact > 0;
if (seek.type == MPSEEK_FACTOR || seek.amount < 0 ||
(seek.type == MPSEEK_ABSOLUTE && seek.amount < mpctx->last_chapter_pts))
mpctx->last_chapter_seek = -2;
if (seek.type == MPSEEK_FACTOR) {
double len = get_time_length(mpctx);
if (len > 0 && !mpctx->demuxer->ts_resets_possible) {
seek.amount = seek.amount * len + get_start_time(mpctx);
seek.type = MPSEEK_ABSOLUTE;
}
}
if ((mpctx->demuxer->accurate_seek || mpctx->timeline)
&& seek.type == MPSEEK_RELATIVE) {
seek.type = MPSEEK_ABSOLUTE;
seek.direction = seek.amount > 0 ? 1 : -1;
seek.amount += get_current_time(mpctx);
}
/* At least the liba52 decoder wants to read from the input stream
* during initialization, so reinit must be done after the demux_seek()
* call that clears possible stream EOF. */
bool need_reset = false;
double demuxer_amount = seek.amount;
if (mpctx->timeline) {
demuxer_amount = timeline_set_from_time(mpctx, seek.amount,
&need_reset);
if (demuxer_amount == -1) {
assert(!need_reset);
mpctx->stop_play = AT_END_OF_FILE;
if (mpctx->d_audio && !timeline_fallthrough) {
// Seek outside of the file -> clear audio from current position
clear_audio_decode_buffers(mpctx);
clear_audio_output_buffers(mpctx);
}
return -1;
}
}
if (need_reset) {
reinit_video_chain(mpctx);
reinit_subs(mpctx, 0);
reinit_subs(mpctx, 1);
}
int demuxer_style = 0;
switch (seek.type) {
case MPSEEK_FACTOR:
demuxer_style |= SEEK_ABSOLUTE | SEEK_FACTOR;
break;
case MPSEEK_ABSOLUTE:
demuxer_style |= SEEK_ABSOLUTE;
break;
}
if (hr_seek || seek.direction < 0)
demuxer_style |= SEEK_BACKWARD;
else if (seek.direction > 0)
demuxer_style |= SEEK_FORWARD;
if (hr_seek || opts->mkv_subtitle_preroll)
demuxer_style |= SEEK_SUBPREROLL;
if (hr_seek)
demuxer_amount -= hr_seek_offset;
int seekresult = demux_seek(mpctx->demuxer, demuxer_amount, demuxer_style);
if (seekresult == 0) {
if (need_reset) {
reinit_audio_chain(mpctx);
seek_reset(mpctx, !timeline_fallthrough, false);
}
return -1;
}
// 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;
if (seek.type == MPSEEK_ABSOLUTE) {
main_new_pos = seek.amount - mpctx->video_offset;
} else {
main_new_pos = get_main_demux_pts(mpctx);
}
demux_seek(track->demuxer, main_new_pos, SEEK_ABSOLUTE);
}
}
if (need_reset)
reinit_audio_chain(mpctx);
/* If we just reinitialized audio it doesn't need to be reset,
* and resetting could lose audio some decoders produce during init. */
seek_reset(mpctx, !timeline_fallthrough, !need_reset);
if (timeline_fallthrough) {
// Important if video reinit happens.
mpctx->vo_pts_history_seek_ts = prev_seek_ts;
} else {
mpctx->vo_pts_history_seek_ts++;
mpctx->backstep_active = false;
}
/* Use the target time as "current position" for further relative
* seeks etc until a new video frame has been decoded */
if (seek.type == MPSEEK_ABSOLUTE) {
mpctx->video_pts = seek.amount;
mpctx->last_seek_pts = seek.amount;
} else
mpctx->last_seek_pts = MP_NOPTS_VALUE;
// The hr_seek==false case is for skipping frames with PTS before the
// current timeline chapter start. It's not really known where the demuxer
// level seek will end up, so the hrseek mechanism is abused to skip all
// frames before chapter start by setting hrseek_pts to the chapter start.
// It does nothing when the seek is inside of the current chapter, and
// seeking past the chapter is handled elsewhere.
if (hr_seek || mpctx->timeline) {
mpctx->hrseek_active = true;
mpctx->hrseek_framedrop = !hr_seek_very_exact;
mpctx->hrseek_pts = hr_seek ? seek.amount
: mpctx->timeline[mpctx->timeline_part].start;
}
mpctx->start_timestamp = mp_time_sec();
return 0;
}
// This combines consecutive seek requests.
void queue_seek(struct MPContext *mpctx, enum seek_type type, double amount,
int exact, bool immediate)
{
struct seek_params *seek = &mpctx->seek;
switch (type) {
case MPSEEK_RELATIVE:
seek->immediate |= immediate;
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;
if (seek->amount == 0) {
*seek = (struct seek_params){ 0 };
return;
}
seek->type = MPSEEK_RELATIVE;
return;
case MPSEEK_ABSOLUTE:
case MPSEEK_FACTOR:
*seek = (struct seek_params) {
.type = type,
.amount = amount,
.exact = exact,
.immediate = immediate,
};
return;
case MPSEEK_NONE:
*seek = (struct seek_params){ 0 };
return;
}
abort();
}
void execute_queued_seek(struct MPContext *mpctx)
{
if (mpctx->seek.type) {
/* 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). */
if (!mpctx->seek.immediate && mpctx->restart_playback &&
mp_time_sec() - mpctx->start_timestamp < 0.3)
return;
mp_seek(mpctx, mpctx->seek, false);
mpctx->seek = (struct seek_params){0};
}
}
double get_time_length(struct MPContext *mpctx)
{
struct demuxer *demuxer = mpctx->demuxer;
if (!demuxer)
return 0;
if (mpctx->timeline)
return mpctx->timeline[mpctx->num_timeline_parts].start;
double len = demuxer_get_time_length(demuxer);
if (len >= 0)
return len;
// Unknown
return 0;
}
/* If there are timestamps from stream level then use those (for example
* DVDs can have consistent times there while the MPEG-level timestamps
* reset). */
double get_current_time(struct MPContext *mpctx)
{
struct demuxer *demuxer = mpctx->demuxer;
if (!demuxer)
return 0;
if (demuxer->stream_pts != MP_NOPTS_VALUE)
return demuxer->stream_pts;
if (mpctx->playback_pts != MP_NOPTS_VALUE)
return mpctx->playback_pts;
if (mpctx->last_seek_pts != MP_NOPTS_VALUE)
return mpctx->last_seek_pts;
return 0;
}
// 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 = get_start_time(mpctx);
double len = get_time_length(mpctx);
if (use_range) {
double startpos = rel_time_to_abs(mpctx, mpctx->opts->play_start);
double endpos = get_play_end_pts(mpctx);
if (endpos == MP_NOPTS_VALUE || endpos > start + len)
endpos = start + len;
if (startpos == MP_NOPTS_VALUE || startpos < start)
startpos = start;
if (endpos < startpos)
endpos = startpos;
start = startpos;
len = endpos - startpos;
}
double pos = get_current_time(mpctx);
if (len > 0 && !demuxer->ts_resets_possible) {
ans = MPCLAMP((pos - start) / len, 0, 1);
} else {
struct stream *s = demuxer->stream;
int64_t size = s->end_pos - s->start_pos;
int64_t fpos = demuxer->filepos >= 0 ?
demuxer->filepos : stream_tell(demuxer->stream);
if (size > 0)
ans = MPCLAMP((double)(fpos - s->start_pos) / 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;
}
int get_percent_pos(struct MPContext *mpctx)
{
int pos = get_current_pos_ratio(mpctx, false) * 100;
return MPCLAMP(pos, 0, 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 = 1; i < mpctx->num_chapters; i++)
if (current_pts < mpctx->chapters[i].start)
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 = name;
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);
}
if (dname != name)
talloc_free(name);
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 talloc_strdup(NULL, mpctx->chapters[chapter].name);
}
// returns the start of the chapter in seconds (-1 if unavailable)
double chapter_start_time(struct MPContext *mpctx, int chapter)
{
if (chapter == -1)
return get_start_time(mpctx);
if (chapter >= 0 && chapter < mpctx->num_chapters)
return mpctx->chapters[chapter].start;
return MP_NOPTS_VALUE;
}
int get_chapter_count(struct MPContext *mpctx)
{
return mpctx->num_chapters;
}
// Seek to a given chapter. Queues the seek.
bool mp_seek_chapter(struct MPContext *mpctx, int chapter)
{
int num = get_chapter_count(mpctx);
if (num == 0)
return false;
if (chapter < -1 || chapter >= num)
return false;
mpctx->last_chapter_seek = -2;
double pts = chapter_start_time(mpctx, chapter);
if (pts == MP_NOPTS_VALUE)
return false;
queue_seek(mpctx, MPSEEK_ABSOLUTE, pts, 0, true);
mpctx->last_chapter_seek = chapter;
mpctx->last_chapter_pts = pts;
return true;
}
static void update_avsync(struct MPContext *mpctx)
{
if (!mpctx->d_audio || !mpctx->d_video)
return;
double a_pos = playing_audio_pts(mpctx);
mpctx->last_av_difference = a_pos - mpctx->video_pts + mpctx->audio_delay;
if (mpctx->time_frame > 0)
mpctx->last_av_difference +=
mpctx->time_frame * mpctx->opts->playback_speed;
if (a_pos == MP_NOPTS_VALUE || mpctx->video_pts == MP_NOPTS_VALUE)
mpctx->last_av_difference = MP_NOPTS_VALUE;
if (mpctx->last_av_difference > 0.5 && mpctx->drop_frame_cnt > 50
&& !mpctx->drop_message_shown) {
MP_WARN(mpctx, "%s", av_desync_help_text);
mpctx->drop_message_shown = true;
}
}
/* Modify video timing to match the audio timeline. There are two main
* reasons this is needed. First, video and audio can start from different
* positions at beginning of file or after a seek (MPlayer starts both
* immediately even if they have different pts). Second, the file can have
* audio timestamps that are inconsistent with the duration of the audio
* packets, for example two consecutive timestamp values differing by
* one second but only a packet with enough samples for half a second
* of playback between them.
*/
static void adjust_sync(struct MPContext *mpctx, double frame_time)
{
struct MPOpts *opts = mpctx->opts;
if (!mpctx->d_audio || mpctx->syncing_audio)
return;
double a_pts = written_audio_pts(mpctx) - mpctx->delay;
double v_pts = mpctx->video_next_pts;
double av_delay = a_pts - v_pts;
// Try to sync vo_flip() so it will *finish* at given time
av_delay += mpctx->last_vo_flip_duration;
av_delay += mpctx->audio_delay; // This much pts difference is desired
double change = av_delay * 0.1;
double max_change = opts->default_max_pts_correction >= 0 ?
opts->default_max_pts_correction : frame_time * 0.1;
if (change < -max_change)
change = -max_change;
else if (change > max_change)
change = max_change;
mpctx->delay += change;
mpctx->total_avsync_change += change;
}
static bool handle_osd_redraw(struct MPContext *mpctx)
{
if (!mpctx->video_out || !mpctx->video_out->config_ok)
return false;
bool want_redraw = vo_get_want_redraw(mpctx->video_out) |
(osd_query_and_reset_want_redraw(mpctx->osd) &&
mpctx->video_out->driver->draw_osd);
if (want_redraw) {
if (redraw_osd(mpctx))
return true;
}
return false;
}
static void handle_metadata_update(struct MPContext *mpctx)
{
if (mp_time_sec() > mpctx->last_metadata_update + 2) {
if (demux_info_update(mpctx->demuxer))
mp_notify(mpctx, MPV_EVENT_METADATA_UPDATE, NULL);
mpctx->last_metadata_update = mp_time_sec();
}
}
static void handle_pause_on_low_cache(struct MPContext *mpctx)
{
struct MPOpts *opts = mpctx->opts;
int cache = mp_get_cache_percent(mpctx);
bool idle = mp_get_cache_idle(mpctx);
if (mpctx->paused && mpctx->paused_for_cache) {
if (cache < 0 || cache >= opts->stream_cache_min_percent || idle) {
mpctx->paused_for_cache = false;
if (!opts->pause)
unpause_player(mpctx);
}
} else {
if (cache >= 0 && cache <= opts->stream_cache_pause && !idle &&
opts->stream_cache_pause < opts->stream_cache_min_percent)
{
bool prev_paused_user = opts->pause;
pause_player(mpctx);
mpctx->paused_for_cache = true;
opts->pause = prev_paused_user;
}
}
}
static void handle_heartbeat_cmd(struct MPContext *mpctx)
{
struct MPOpts *opts = mpctx->opts;
if (opts->heartbeat_cmd && !mpctx->paused) {
double now = mp_time_sec();
if (now - mpctx->last_heartbeat > opts->heartbeat_interval) {
mpctx->last_heartbeat = now;
system(opts->heartbeat_cmd);
}
}
}
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;
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 =
mp_time_sec() + opts->cursor_autohide_delay / 1000.0;
mouse_cursor_visible = true;
}
if (mp_time_sec() >= mpctx->mouse_timer)
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_input_and_seek_coalesce(struct MPContext *mpctx)
{
mp_cmd_t *cmd;
while ((cmd = mp_input_get_cmd(mpctx->input, 0, 1)) != NULL) {
mp_dispatch_queue_process(mpctx->dispatch, 0);
cmd = mp_input_get_cmd(mpctx->input, 0, 0);
run_command(mpctx, cmd);
mp_cmd_free(cmd);
if (mpctx->stop_play)
break;
}
mp_dispatch_queue_process(mpctx->dispatch, 0);
}
void add_frame_pts(struct MPContext *mpctx, double pts)
{
if (pts == MP_NOPTS_VALUE || mpctx->hrseek_framedrop) {
mpctx->vo_pts_history_seek_ts++; // mark discontinuity
return;
}
if (mpctx->vo_pts_history_pts[0] == pts) // may be called multiple times
return;
for (int n = MAX_NUM_VO_PTS - 1; n >= 1; n--) {
mpctx->vo_pts_history_seek[n] = mpctx->vo_pts_history_seek[n - 1];
mpctx->vo_pts_history_pts[n] = mpctx->vo_pts_history_pts[n - 1];
}
mpctx->vo_pts_history_seek[0] = mpctx->vo_pts_history_seek_ts;
mpctx->vo_pts_history_pts[0] = pts;
}
static double find_previous_pts(struct MPContext *mpctx, double pts)
{
for (int n = 0; n < MAX_NUM_VO_PTS - 1; n++) {
if (pts == mpctx->vo_pts_history_pts[n] &&
mpctx->vo_pts_history_seek[n] != 0 &&
mpctx->vo_pts_history_seek[n] == mpctx->vo_pts_history_seek[n + 1])
{
return mpctx->vo_pts_history_pts[n + 1];
}
}
return MP_NOPTS_VALUE;
}
static double get_last_frame_pts(struct MPContext *mpctx)
{
if (mpctx->vo_pts_history_seek[0] == mpctx->vo_pts_history_seek_ts)
return mpctx->vo_pts_history_pts[0];
return MP_NOPTS_VALUE;
}
static void handle_backstep(struct MPContext *mpctx)
{
if (!mpctx->backstep_active)
return;
double current_pts = mpctx->last_vo_pts;
mpctx->backstep_active = false;
bool demuxer_ok = mpctx->demuxer && mpctx->demuxer->accurate_seek;
if (demuxer_ok && mpctx->d_video && current_pts != MP_NOPTS_VALUE) {
double seek_pts = find_previous_pts(mpctx, current_pts);
if (seek_pts != MP_NOPTS_VALUE) {
queue_seek(mpctx, MPSEEK_ABSOLUTE, seek_pts, 2, true);
} else {
double last = get_last_frame_pts(mpctx);
if (last != MP_NOPTS_VALUE && last >= current_pts &&
mpctx->backstep_start_seek_ts != mpctx->vo_pts_history_seek_ts)
{
MP_ERR(mpctx, "Backstep failed.\n");
queue_seek(mpctx, MPSEEK_ABSOLUTE, current_pts, 2, true);
} else if (!mpctx->hrseek_active) {
MP_VERBOSE(mpctx, "Start backstep indexing.\n");
// Force it to index the video up until current_pts.
// The whole point is getting frames _before_ that PTS,
// so apply an arbitrary offset. (In theory the offset
// has to be large enough to reach the previous frame.)
mp_seek(mpctx, (struct seek_params){
.type = MPSEEK_ABSOLUTE,
.amount = current_pts - 1.0,
}, false);
// Don't leave hr-seek mode. If all goes right, hr-seek
// mode is cancelled as soon as the frame before
// current_pts is found during hr-seeking.
// Note that current_pts should be part of the index,
// otherwise we can't find the previous frame, so set the
// seek target an arbitrary amount of time after it.
if (mpctx->hrseek_active) {
mpctx->hrseek_pts = current_pts + 10.0;
mpctx->hrseek_framedrop = false;
mpctx->backstep_active = true;
}
} else {
mpctx->backstep_active = true;
}
}
}
}
static void handle_sstep(struct MPContext *mpctx)
{
struct MPOpts *opts = mpctx->opts;
if (opts->step_sec > 0 && !mpctx->stop_play && !mpctx->paused &&
!mpctx->restart_playback)
{
set_osd_function(mpctx, OSD_FFW);
queue_seek(mpctx, MPSEEK_RELATIVE, opts->step_sec, 0, true);
}
}
static void handle_loop_file(struct MPContext *mpctx)
{
struct MPOpts *opts = mpctx->opts;
if (opts->loop_file && mpctx->stop_play == AT_END_OF_FILE) {
set_osd_function(mpctx, OSD_FFW);
queue_seek(mpctx, MPSEEK_ABSOLUTE, get_start_time(mpctx), 0, 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) {
mpctx->stop_play = KEEP_PLAYING;
mpctx->playback_pts = mpctx->last_vo_pts;
mpctx->eof_reached = true;
pause_player(mpctx);
}
}
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, if it hasn't had a valid frame
// for a while. The problem is that a VO with no valid frame (vo->hasframe==0)
// doesn't redraw video and doesn't OSD interaction. So screw it, hard.
void handle_force_window(struct MPContext *mpctx, bool reconfig)
{
// Don't interfere with real video playback
if (mpctx->d_video)
return;
struct vo *vo = mpctx->video_out;
if (!vo)
return;
if (!vo->config_ok || reconfig) {
MP_INFO(mpctx, "Creating non-video VO window.\n");
// Pick whatever works
int config_format = 0;
for (int fmt = IMGFMT_START; fmt < IMGFMT_END; fmt++) {
if (vo->driver->query_format(vo, fmt)) {
config_format = fmt;
break;
}
}
int w = 960;
int h = 480;
struct mp_image_params p = {
.imgfmt = config_format,
.w = w, .h = h,
.d_w = w, .d_h = h,
};
vo_reconfig(vo, &p, 0);
redraw_osd(mpctx);
mp_notify(mpctx, MPV_EVENT_VIDEO_RECONFIG, NULL);
}
}
static double timing_sleep(struct MPContext *mpctx, double time_frame)
{
// assume kernel HZ=100 for softsleep, works with larger HZ but with
// unnecessarily high CPU usage
struct MPOpts *opts = mpctx->opts;
double margin = opts->softsleep ? 0.011 : 0;
while (time_frame > margin) {
mp_sleep_us(1000000 * (time_frame - margin));
time_frame -= get_relative_time(mpctx);
}
if (opts->softsleep) {
if (time_frame < 0)
MP_WARN(mpctx, "Warning! Softsleep underflow!\n");
while (time_frame > 0)
time_frame -= get_relative_time(mpctx); // burn the CPU
}
return time_frame;
}
static double get_wakeup_period(struct MPContext *mpctx)
{
/* Even if we can immediately wake up in response to most input events,
* there are some timers which are not registered to the event loop
* and need to be checked periodically (like automatic mouse cursor hiding).
* OSD content updates behave similarly. Also some uncommon input devices
* may not have proper FD event support.
*/
double sleeptime = WAKEUP_PERIOD;
#if !HAVE_POSIX_SELECT
// No proper file descriptor event handling; keep waking up to poll input
sleeptime = MPMIN(sleeptime, 0.02);
#endif
if (mpctx->video_out)
if (mpctx->video_out->wakeup_period > 0)
sleeptime = MPMIN(sleeptime, mpctx->video_out->wakeup_period);
return sleeptime;
}
void run_playloop(struct MPContext *mpctx)
{
struct MPOpts *opts = mpctx->opts;
bool full_audio_buffers = false;
bool audio_left = false, video_left = false;
double endpts = get_play_end_pts(mpctx);
bool end_is_chapter = false;
double sleeptime = get_wakeup_period(mpctx);
bool was_restart = mpctx->restart_playback;
bool new_frame_shown = false;
#if HAVE_ENCODING
if (encode_lavc_didfail(mpctx->encode_lavc_ctx)) {
mpctx->stop_play = PT_QUIT;
return;
}
#endif
// Add tracks that were added by the demuxer later (e.g. MPEG)
if (!mpctx->timeline && mpctx->demuxer)
add_demuxer_tracks(mpctx, mpctx->demuxer);
if (mpctx->timeline) {
double end = mpctx->timeline[mpctx->timeline_part + 1].start;
if (endpts == MP_NOPTS_VALUE || end < endpts) {
endpts = end;
end_is_chapter = true;
}
}
if (opts->chapterrange[1] > 0) {
double end = chapter_start_time(mpctx, opts->chapterrange[1]);
if (end != MP_NOPTS_VALUE && (endpts == MP_NOPTS_VALUE || end < endpts))
endpts = end;
}
if (mpctx->d_audio && !mpctx->restart_playback && !ao_untimed(mpctx->ao)) {
int status = fill_audio_out_buffers(mpctx, endpts);
full_audio_buffers = status >= 0;
// Not at audio stream EOF yet
audio_left = status > -2;
}
if (mpctx->video_out) {
vo_check_events(mpctx->video_out);
handle_cursor_autohide(mpctx);
handle_heartbeat_cmd(mpctx);
}
while (mpctx->d_video) { // never loops, for "break;" only
struct vo *vo = mpctx->video_out;
update_fps(mpctx);
// Whether there's still at least 1 video frame that can be shown.
// If false, it means we can reconfig the VO if needed (normally, this
// would disrupt playback, so only do it on !still_playing).
bool still_playing = vo_has_next_frame(vo, true);
// For the last frame case (frame is being displayed).
still_playing |= mpctx->playing_last_frame;
still_playing |= mpctx->last_frame_duration > 0;
double frame_time = 0;
int r = update_video(mpctx, endpts, !still_playing, &frame_time);
MP_VERBOSE(mpctx, "update_video: %d\n", r);
if (r < 0) {
MP_FATAL(mpctx, "Could not initialize video chain.\n");
int uninit = INITIALIZED_VCODEC;
if (!opts->force_vo)
uninit |= INITIALIZED_VO;
uninit_player(mpctx, uninit);
if (!mpctx->current_track[STREAM_AUDIO])
mpctx->stop_play = PT_NEXT_ENTRY;
mpctx->error_playing = true;
handle_force_window(mpctx, true);
break;
}
if (r == 0) {
if (!mpctx->playing_last_frame && mpctx->last_frame_duration > 0) {
mpctx->time_frame += mpctx->last_frame_duration;
mpctx->last_frame_duration = 0;
mpctx->playing_last_frame = true;
MP_VERBOSE(mpctx, "showing last frame\n");
}
if (mpctx->playing_last_frame) {
r = 1; // don't stop playback yet
MP_VERBOSE(mpctx, "still showing last frame\n");
}
}
video_left = r > 0;
if (r == 2)
MP_VERBOSE(mpctx, "frametime=%5.3f\n", frame_time);
if (r == 2 && !mpctx->restart_playback) {
mpctx->time_frame += frame_time / opts->playback_speed;
adjust_sync(mpctx, frame_time);
}
if (!video_left) {
mpctx->delay = 0;
mpctx->last_av_difference = 0;
}
if (!video_left || (mpctx->paused && !mpctx->restart_playback)) {
if (mpctx->paused)
video_left |= vo->hasframe;
break;
}
if (r != 2 && !mpctx->playing_last_frame) {
sleeptime = 0;
break;
}
mpctx->time_frame -= get_relative_time(mpctx);
double audio_pts = playing_audio_pts(mpctx);
if (full_audio_buffers && !mpctx->restart_playback) {
double buffered_audio = ao_get_delay(mpctx->ao);
MP_TRACE(mpctx, "audio delay=%f\n", buffered_audio);
if (opts->autosync) {
/* Smooth reported playback position from AO by averaging
* it with the value expected based on previus value and
* time elapsed since then. May help smooth video timing
* with audio output that have inaccurate position reporting.
* This is badly implemented; the behavior of the smoothing
* now undesirably depends on how often this code runs
* (mainly depends on video frame rate). */
float predicted = (mpctx->delay / opts->playback_speed +
mpctx->time_frame);
float difference = buffered_audio - predicted;
buffered_audio = predicted + difference / opts->autosync;
}
mpctx->time_frame = (buffered_audio -
mpctx->delay / opts->playback_speed);
} else {
/* If we're more than 200 ms behind the right playback
* position, don't try to speed up display of following
* frames to catch up; continue with default speed from
* the current frame instead.
* If untimed is set always output frames immediately
* without sleeping.
*/
if (mpctx->time_frame < -0.2 || opts->untimed || vo->untimed)
mpctx->time_frame = 0;
}
double vsleep = mpctx->time_frame - vo->flip_queue_offset;
if (vsleep > 0.050) {
sleeptime = MPMIN(sleeptime, vsleep - 0.040);
break;
}
sleeptime = 0;
mpctx->playing_last_frame = false;
// last frame case (don't set video_left - consider format changes)
if (r != 2)
break;
//=================== FLIP PAGE (VIDEO BLT): ======================
MP_STATS(mpctx, "vo draw frame");
vo_new_frame_imminent(vo);
mpctx->video_pts = mpctx->video_next_pts;
mpctx->last_vo_pts = mpctx->video_pts;
mpctx->playback_pts = mpctx->video_pts;
update_subtitles(mpctx);
update_osd_msg(mpctx);
MP_STATS(mpctx, "draw OSD");
draw_osd(mpctx);
MP_STATS(mpctx, "vo sleep");
mpctx->time_frame -= get_relative_time(mpctx);
mpctx->time_frame -= vo->flip_queue_offset;
if (mpctx->time_frame > 0.001)
mpctx->time_frame = timing_sleep(mpctx, mpctx->time_frame);
mpctx->time_frame += vo->flip_queue_offset;
int64_t t2 = mp_time_us();
/* Playing with playback speed it's possible to get pathological
* cases with mpctx->time_frame negative enough to cause an
* overflow in pts_us calculation, thus the MPMAX. */
double time_frame = MPMAX(mpctx->time_frame, -1);
int64_t pts_us = mpctx->last_time + time_frame * 1e6;
int duration = -1;
double pts2 = vo_get_next_pts(vo, 0); // this is the next frame PTS
if (mpctx->video_pts != MP_NOPTS_VALUE && pts2 == MP_NOPTS_VALUE) {
// Make up a frame duration. Using the frame rate is not a good
// choice, since the frame rate could be unset/broken/random.
float fps = mpctx->d_video->fps;
double frame_duration = fps > 0 ? 1.0 / fps : 0;
pts2 = mpctx->video_pts + MPCLAMP(frame_duration, 0.0, 5.0);
}
if (pts2 != MP_NOPTS_VALUE) {
// expected A/V sync correction is ignored
double diff = (pts2 - mpctx->video_pts);
diff /= opts->playback_speed;
if (mpctx->time_frame < 0)
diff += mpctx->time_frame;
if (diff < 0)
diff = 0;
if (diff > 10)
diff = 10;
duration = diff * 1e6;
mpctx->last_frame_duration = diff;
}
if (mpctx->restart_playback)
duration = -1;
MP_STATS(mpctx, "start flip");
vo_flip_page(vo, pts_us | 1, duration);
MP_STATS(mpctx, "end flip");
if (audio_pts != MP_NOPTS_VALUE)
MP_STATS(mpctx, "value %f ptsdiff", mpctx->video_pts - audio_pts);
mpctx->last_vo_flip_duration = (mp_time_us() - t2) * 0.000001;
if (vo->driver->flip_page_timed) {
// No need to adjust sync based on flip speed
mpctx->last_vo_flip_duration = 0;
// For print_status - VO call finishing early is OK for sync
mpctx->time_frame -= get_relative_time(mpctx);
}
mpctx->shown_vframes++;
if (mpctx->restart_playback) {
if (mpctx->sync_audio_to_video) {
mpctx->syncing_audio = true;
if (mpctx->d_audio)
fill_audio_out_buffers(mpctx, endpts);
mpctx->restart_playback = false;
mp_notify(mpctx, MPV_EVENT_PLAYBACK_RESTART, NULL);
}
mpctx->time_frame = 0;
get_relative_time(mpctx);
}
update_avsync(mpctx);
screenshot_flip(mpctx);
new_frame_shown = true;
mp_notify(mpctx, MPV_EVENT_TICK, NULL);
break;
} // video
if (!video_left || mpctx->paused) {
if (mp_time_sec() - mpctx->last_idle_tick > 0.5) {
mpctx->last_idle_tick = mp_time_sec();
mp_notify(mpctx, MPV_EVENT_TICK, NULL);
}
}
video_left &= mpctx->sync_audio_to_video; // force no-video semantics
if (mpctx->d_audio && (mpctx->restart_playback ? !video_left :
ao_untimed(mpctx->ao) && (mpctx->delay <= 0 ||
!video_left)))
{
int status = fill_audio_out_buffers(mpctx, endpts);
full_audio_buffers = status >= 0 && !ao_untimed(mpctx->ao);
// Not at audio stream EOF yet
audio_left = status > -2;
}
if (!video_left)
mpctx->restart_playback = false;
update_osd_msg(mpctx);
if (!video_left && (!mpctx->paused || was_restart)) {
double a_pos = 0;
if (mpctx->d_audio)
a_pos = playing_audio_pts(mpctx);
mpctx->playback_pts = a_pos;
if (was_restart)
mp_notify(mpctx, MPV_EVENT_PLAYBACK_RESTART, NULL);
}
update_subtitles(mpctx);
/* 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.
*
* When all audio has been written to output driver, stay in the
* main loop handling commands until it has been mostly consumed,
* except in the gapless case, where the next file will be started
* while audio from the current one still remains to be played.
*
* We want this check to trigger if we seeked to this position,
* but not if we paused at it with audio possibly still buffered in
* the AO. There's currently no working way to check buffered audio
* inside AO while paused. Thus the "was_restart" check below, which
* should trigger after seek only, when we know there's no audio
* buffered.
*/
if ((mpctx->d_audio || mpctx->d_video) && !audio_left && !video_left
&& (opts->gapless_audio || !mpctx->d_audio || ao_eof_reached(mpctx->ao))
&& (!mpctx->paused || was_restart)) {
if (end_is_chapter) {
mp_seek(mpctx, (struct seek_params){
.type = MPSEEK_ABSOLUTE,
.amount = mpctx->timeline[mpctx->timeline_part+1].start
}, true);
} else
mpctx->stop_play = AT_END_OF_FILE;
}
mp_handle_nav(mpctx);
if (!mpctx->stop_play && !mpctx->restart_playback) {
// If no more video is available, one frame means one playloop iteration.
// Otherwise, one frame means one video frame.
if (!video_left)
new_frame_shown = true;
if (opts->playing_msg && !mpctx->playing_msg_shown && new_frame_shown) {
mpctx->playing_msg_shown = true;
char *msg =
mp_property_expand_escaped_string(mpctx, opts->playing_msg);
MP_INFO(mpctx, "%s\n", msg);
talloc_free(msg);
}
if (mpctx->max_frames >= 0) {
if (new_frame_shown)
mpctx->max_frames--;
if (mpctx->max_frames <= 0)
mpctx->stop_play = PT_NEXT_ENTRY;
}
if (mpctx->step_frames > 0 && !mpctx->paused) {
if (new_frame_shown)
mpctx->step_frames--;
if (mpctx->step_frames == 0)
pause_player(mpctx);
}
}
if (!mpctx->stop_play) {
if (mpctx->restart_playback)
sleeptime = 0;
if (sleeptime > 0) {
if (handle_osd_redraw(mpctx))
sleeptime = 0;
}
if (sleeptime > 0) {
MP_STATS(mpctx, "start sleep");
mp_input_get_cmd(mpctx->input, sleeptime * 1000, true);
MP_STATS(mpctx, "end sleep");
}
}
handle_metadata_update(mpctx);
handle_pause_on_low_cache(mpctx);
handle_input_and_seek_coalesce(mpctx);
handle_backstep(mpctx);
handle_sstep(mpctx);
handle_loop_file(mpctx);
handle_keep_open(mpctx);
handle_chapter_change(mpctx);
handle_force_window(mpctx, false);
execute_queued_seek(mpctx);
if (mpctx->opts->use_terminal)
getch2_poll();
}
// 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)
{
mpctx->eof_reached = true;
if (need_reinit) {
mp_notify(mpctx, MPV_EVENT_IDLE, NULL);
handle_force_window(mpctx, true);
}
need_reinit = false;
int uninit = INITIALIZED_AO;
if (!mpctx->opts->force_vo)
uninit |= INITIALIZED_VO;
uninit_player(mpctx, uninit);
handle_force_window(mpctx, false);
if (mpctx->video_out)
vo_check_events(mpctx->video_out);
update_osd_msg(mpctx);
handle_osd_redraw(mpctx);
mp_cmd_t *cmd = mp_input_get_cmd(mpctx->input,
get_wakeup_period(mpctx) * 1000,
false);
if (cmd)
run_command(mpctx, cmd);
mp_cmd_free(cmd);
mp_dispatch_queue_process(mpctx->dispatch, 0);
if (mpctx->opts->use_terminal)
getch2_poll();
}
}
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