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mpv/player/video.c
wm4 543ba6c114 video: add VO framedropping mode 
This mostly uses the same idea as with vo_vdpau.c, but much simplified.

On X11, it tries to get the display framerate with XF86VM, and limits
the frequency of new video frames against it. Note that this is an old
extension, and is confirmed not to work correctly with multi-monitor
setups. But we're using it because it was already around (it is also
used by vo_vdpau).

This attempts to predict the next vsync event by using the time of the
last frame and the display FPS. Even if that goes completely wrong,
the results are still relatively good.

On other systems, or if the X11 code doesn't return a display FPS, a
framerate of 1000 is assumed. This is infinite for all practical
purposes, and means that only frames which are definitely too late are
dropped. This probably has worse results, but is still useful.

"--framedrop=yes" is basically replaced with "--framedrop=decoder". The
old framedropping mode is kept around, and should perhaps be improved.
Dropping on the decoder level is still useful if decoding itself is too
slow.
2014-08-15 23:33:33 +02:00

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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 "options/m_config.h"
#include "options/m_option.h"
#include "common/common.h"
#include "common/encode.h"
#include "options/m_property.h"
#include "osdep/timer.h"
#include "audio/out/ao.h"
#include "demux/demux.h"
#include "stream/stream.h"
#include "sub/osd.h"
#include "video/hwdec.h"
#include "video/filter/vf.h"
#include "video/decode/dec_video.h"
#include "video/decode/vd.h"
#include "video/out/vo.h"
#include "core.h"
#include "command.h"
#include "screenshot.h"
enum {
// update_video() - code also uses: <0 error, 0 eof, >0 progress
VD_ERROR = -1,
VD_EOF = 0, // end of file - no new output
VD_PROGRESS = 1, // progress, but no output; repeat call with no waiting
VD_NEW_FRAME = 2, // the call produced a new frame
VD_WAIT = 3, // no EOF, but no output; wait until wakeup
};
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 update_fps(struct MPContext *mpctx)
{
#if HAVE_ENCODING
struct dec_video *d_video = mpctx->d_video;
if (mpctx->encode_lavc_ctx && d_video)
encode_lavc_set_video_fps(mpctx->encode_lavc_ctx, d_video->fps);
#endif
}
static void set_allowed_vo_formats(struct vf_chain *c, struct vo *vo)
{
for (int fmt = IMGFMT_START; fmt < IMGFMT_END; fmt++) {
c->allowed_output_formats[fmt - IMGFMT_START] =
vo->driver->query_format(vo, fmt);
}
}
static int try_filter(struct MPContext *mpctx, struct mp_image_params params,
char *name, char *label, char **args)
{
struct dec_video *d_video = mpctx->d_video;
struct vf_instance *vf = vf_append_filter(d_video->vfilter, name, args);
if (!vf)
return -1;
vf->label = talloc_strdup(vf, label);
if (video_reconfig_filters(d_video, &params) < 0) {
vf_remove_filter(d_video->vfilter, vf);
// restore
video_reconfig_filters(d_video, &params);
return -1;
}
return 0;
}
// Reconfigure the filter chain according to decoder output.
// probe_only: don't force fallback to software when doing hw decoding, and
// the filter chain couldn't be configured
static void filter_reconfig(struct MPContext *mpctx,
bool probe_only)
{
struct dec_video *d_video = mpctx->d_video;
struct mp_image_params params = d_video->decoder_output;
mp_notify(mpctx, MPV_EVENT_VIDEO_RECONFIG, NULL);
set_allowed_vo_formats(d_video->vfilter, mpctx->video_out);
if (video_reconfig_filters(d_video, &params) < 0) {
// Most video filters don't work with hardware decoding, so this
// might be the reason why filter reconfig failed.
if (!probe_only &&
video_vd_control(d_video, VDCTRL_FORCE_HWDEC_FALLBACK, NULL) == CONTROL_OK)
{
// Fallback active; decoder will return software format next
// time. Don't abort video decoding.
d_video->vfilter->initialized = 0;
mp_image_unrefp(&d_video->waiting_decoded_mpi);
d_video->decoder_output = (struct mp_image_params){0};
MP_VERBOSE(mpctx, "hwdec falback due to filters.\n");
}
return;
}
if (d_video->vfilter->initialized < 1)
return;
if (params.rotate && (params.rotate % 90 == 0)) {
if (!(mpctx->video_out->driver->caps & VO_CAP_ROTATE90)) {
// Try to insert a rotation filter.
char deg[10];
snprintf(deg, sizeof(deg), "%d", params.rotate);
char *args[] = {"angle", deg, NULL, NULL};
if (try_filter(mpctx, params, "rotate", "autorotate", args) >= 0) {
params.rotate = 0;
} else {
MP_ERR(mpctx, "Can't insert rotation filter.\n");
}
}
}
}
static void recreate_video_filters(struct MPContext *mpctx)
{
struct MPOpts *opts = mpctx->opts;
struct dec_video *d_video = mpctx->d_video;
assert(d_video);
vf_destroy(d_video->vfilter);
d_video->vfilter = vf_new(mpctx->global);
d_video->vfilter->hwdec = d_video->hwdec_info;
vf_append_filter_list(d_video->vfilter, opts->vf_settings);
// for vf_sub
vf_control_any(d_video->vfilter, VFCTRL_SET_OSD_OBJ, mpctx->osd);
osd_set_render_subs_in_filter(mpctx->osd,
vf_control_any(d_video->vfilter, VFCTRL_INIT_OSD, NULL) == CONTROL_OK);
set_allowed_vo_formats(d_video->vfilter, mpctx->video_out);
}
int reinit_video_filters(struct MPContext *mpctx)
{
struct dec_video *d_video = mpctx->d_video;
if (!d_video)
return 0;
bool need_reconfig = d_video->vfilter->initialized != 0;
recreate_video_filters(mpctx);
if (need_reconfig)
filter_reconfig(mpctx, true);
if (!d_video->vfilter)
return 0;
return d_video->vfilter->initialized;
}
void reset_video_state(struct MPContext *mpctx)
{
if (mpctx->d_video)
video_reset_decoding(mpctx->d_video);
if (mpctx->video_out)
vo_seek_reset(mpctx->video_out);
mp_image_unrefp(&mpctx->next_frame[0]);
mp_image_unrefp(&mpctx->next_frame[1]);
mpctx->delay = 0;
mpctx->time_frame = 0;
mpctx->video_next_pts = MP_NOPTS_VALUE;
mpctx->playing_last_frame = false;
mpctx->total_avsync_change = 0;
mpctx->drop_frame_cnt = 0;
mpctx->dropped_frames = 0;
mpctx->drop_message_shown = 0;
mpctx->video_status = mpctx->d_video ? STATUS_SYNCING : STATUS_EOF;
}
int reinit_video_chain(struct MPContext *mpctx)
{
struct MPOpts *opts = mpctx->opts;
assert(!(mpctx->initialized_flags & INITIALIZED_VCODEC));
assert(!mpctx->d_video);
struct track *track = mpctx->current_track[0][STREAM_VIDEO];
struct sh_stream *sh = track ? track->stream : NULL;
if (!sh)
goto no_video;
MP_VERBOSE(mpctx, "[V] fourcc:0x%X size:%dx%d fps:%5.3f\n",
sh->format,
sh->video->disp_w, sh->video->disp_h,
sh->video->fps);
//================== Init VIDEO (codec & libvo) ==========================
if (!opts->fixed_vo || !(mpctx->initialized_flags & INITIALIZED_VO)) {
mpctx->video_out = init_best_video_out(mpctx->global, mpctx->input,
mpctx->osd,
mpctx->encode_lavc_ctx);
if (!mpctx->video_out) {
MP_FATAL(mpctx, "Error opening/initializing "
"the selected video_out (-vo) device.\n");
goto err_out;
}
mpctx->mouse_cursor_visible = true;
mpctx->initialized_flags |= INITIALIZED_VO;
}
update_window_title(mpctx, true);
struct dec_video *d_video = talloc_zero(NULL, struct dec_video);
mpctx->d_video = d_video;
d_video->global = mpctx->global;
d_video->log = mp_log_new(d_video, mpctx->log, "!vd");
d_video->opts = mpctx->opts;
d_video->header = sh;
d_video->fps = sh->video->fps;
d_video->vo = mpctx->video_out;
mpctx->initialized_flags |= INITIALIZED_VCODEC;
vo_control(mpctx->video_out, VOCTRL_GET_HWDEC_INFO, &d_video->hwdec_info);
recreate_video_filters(mpctx);
if (!video_init_best_codec(d_video, opts->video_decoders))
goto err_out;
bool saver_state = opts->pause || !opts->stop_screensaver;
vo_control(mpctx->video_out, saver_state ? VOCTRL_RESTORE_SCREENSAVER
: VOCTRL_KILL_SCREENSAVER, NULL);
vo_set_paused(mpctx->video_out, mpctx->paused);
mpctx->sync_audio_to_video = !sh->attached_picture;
mpctx->vo_pts_history_seek_ts++;
// If we switch on video again, ensure audio position matches up.
if (mpctx->d_audio)
mpctx->audio_status = STATUS_SYNCING;
reset_video_state(mpctx);
reset_subtitle_state(mpctx);
if (opts->force_fps) {
d_video->fps = opts->force_fps;
MP_INFO(mpctx, "FPS forced to be %5.3f.\n", d_video->fps);
}
if (!sh->video->fps && !opts->force_fps && !opts->correct_pts) {
MP_ERR(mpctx, "FPS not specified in the "
"header or invalid, use the -fps option.\n");
}
update_fps(mpctx);
return 1;
err_out:
no_video:
uninit_player(mpctx, INITIALIZED_VCODEC | (opts->force_vo ? 0 : INITIALIZED_VO));
mp_deselect_track(mpctx, track);
handle_force_window(mpctx, true);
MP_INFO(mpctx, "Video: no video\n");
return 0;
}
// Try to refresh the video by doing a precise seek to the currently displayed
// frame. This can go wrong in all sorts of ways, so use sparingly.
void mp_force_video_refresh(struct MPContext *mpctx)
{
struct MPOpts *opts = mpctx->opts;
struct dec_video *d_video = mpctx->d_video;
if (!d_video || !d_video->decoder_output.imgfmt)
return;
// If not paused, the next frame should come soon enough.
if (opts->pause && mpctx->last_vo_pts != MP_NOPTS_VALUE)
queue_seek(mpctx, MPSEEK_ABSOLUTE, mpctx->last_vo_pts, 2, true);
}
static int check_framedrop(struct MPContext *mpctx)
{
struct MPOpts *opts = mpctx->opts;
// check for frame-drop:
if (mpctx->video_status == STATUS_PLAYING && !mpctx->paused &&
mpctx->audio_status == STATUS_PLAYING && !ao_untimed(mpctx->ao))
{
float delay = opts->playback_speed * ao_get_delay(mpctx->ao);
float d = delay - mpctx->delay;
float fps = mpctx->d_video->fps;
double frame_time = fps > 0 ? 1.0 / fps : 0;
// we should avoid dropping too many frames in sequence unless we
// are too late. and we allow 100ms A-V delay here:
if (d < -mpctx->dropped_frames * frame_time - 0.100) {
mpctx->drop_frame_cnt++;
mpctx->dropped_frames++;
return !!(mpctx->opts->frame_dropping & 2);
} else
mpctx->dropped_frames = 0;
}
return 0;
}
// Read a packet, store decoded image into d_video->waiting_decoded_mpi
// returns VD_* code
static int decode_image(struct MPContext *mpctx)
{
struct dec_video *d_video = mpctx->d_video;
if (d_video->header->attached_picture) {
d_video->waiting_decoded_mpi =
video_decode(d_video, d_video->header->attached_picture, 0);
return VD_EOF;
}
struct demux_packet *pkt;
if (demux_read_packet_async(d_video->header, &pkt) == 0)
return VD_WAIT;
if (pkt && pkt->pts != MP_NOPTS_VALUE)
pkt->pts += mpctx->video_offset;
if ((pkt && pkt->pts >= mpctx->hrseek_pts - .005) ||
d_video->has_broken_packet_pts ||
!mpctx->opts->hr_seek_framedrop)
{
mpctx->hrseek_framedrop = false;
}
bool hrseek = mpctx->hrseek_active && mpctx->video_status == STATUS_SYNCING;
int framedrop_type = hrseek && mpctx->hrseek_framedrop ?
2 : check_framedrop(mpctx);
d_video->waiting_decoded_mpi =
video_decode(d_video, pkt, framedrop_type);
bool had_packet = !!pkt;
talloc_free(pkt);
return had_packet ? VD_PROGRESS : VD_EOF;
}
// Called after video reinit. This can be generally used to try to insert more
// filters using the filter chain edit functionality in command.c.
static void init_filter_params(struct MPContext *mpctx)
{
struct MPOpts *opts = mpctx->opts;
// Note that the filter chain is already initialized. This code might
// recreate the chain a second time, which is not very elegant, but allows
// us to test whether enabling deinterlacing works with the current video
// format and other filters.
if (opts->deinterlace >= 0)
mp_property_do("deinterlace", M_PROPERTY_SET, &opts->deinterlace, mpctx);
}
// Make sure at least 1 filtered image is available.
// returns VD_* code
// A return value of VD_PROGRESS doesn't necessarily output a frame, but makes
// the promise that calling this function again will eventually do something.
static int video_decode_and_filter(struct MPContext *mpctx)
{
struct dec_video *d_video = mpctx->d_video;
struct vf_chain *vf = d_video->vfilter;
if (vf->initialized < 0)
return VD_ERROR;
// There is already a filtered frame available.
if (vf_output_frame(vf, false) > 0)
return VD_PROGRESS;
// Decoder output is different from filter input?
bool need_vf_reconfig = !vf->input_params.imgfmt || vf->initialized < 1 ||
!mp_image_params_equal(&d_video->decoder_output, &vf->input_params);
// (If imgfmt==0, nothing was decoded yet, and the format is unknown.)
if (need_vf_reconfig && d_video->decoder_output.imgfmt) {
// Drain the filter chain.
if (vf_output_frame(vf, true) > 0)
return VD_PROGRESS;
// The filter chain is drained; execute the filter format change.
filter_reconfig(mpctx, false);
if (vf->initialized == 0)
return VD_PROGRESS; // hw decoding fallback; try again
if (vf->initialized < 1)
return VD_ERROR;
init_filter_params(mpctx);
return VD_PROGRESS;
}
// If something was decoded, and the filter chain is ready, filter it.
if (!need_vf_reconfig && d_video->waiting_decoded_mpi) {
vf_filter_frame(vf, d_video->waiting_decoded_mpi);
d_video->waiting_decoded_mpi = NULL;
return VD_PROGRESS;
}
if (!d_video->waiting_decoded_mpi) {
// Decode a new image, or at least feed the decoder a packet.
int r = decode_image(mpctx);
if (r == VD_WAIT)
return r;
if (d_video->waiting_decoded_mpi)
d_video->decoder_output = d_video->waiting_decoded_mpi->params;
if (!d_video->waiting_decoded_mpi && (r == VD_EOF || r < 0)) {
if (vf_output_frame(vf, true) > 0)
return VD_PROGRESS;
return VD_EOF; // true EOF
}
}
// Image will be filtered on the next iteration.
return VD_PROGRESS;
}
static void init_vo(struct MPContext *mpctx)
{
struct MPOpts *opts = mpctx->opts;
struct dec_video *d_video = mpctx->d_video;
if (opts->gamma_gamma != 1000)
video_set_colors(d_video, "gamma", opts->gamma_gamma);
if (opts->gamma_brightness != 1000)
video_set_colors(d_video, "brightness", opts->gamma_brightness);
if (opts->gamma_contrast != 1000)
video_set_colors(d_video, "contrast", opts->gamma_contrast);
if (opts->gamma_saturation != 1000)
video_set_colors(d_video, "saturation", opts->gamma_saturation);
if (opts->gamma_hue != 1000)
video_set_colors(d_video, "hue", opts->gamma_hue);
mp_notify(mpctx, MPV_EVENT_VIDEO_RECONFIG, NULL);
}
// Fill mpctx->next_frame[] with a newly filtered or decoded image.
// returns VD_* code
static int video_output_image(struct MPContext *mpctx, double endpts)
{
// Filter a new frame.
int r = video_decode_and_filter(mpctx);
if (r < 0)
return r; // error
struct vf_chain *vf = mpctx->d_video->vfilter;
vf_output_frame(vf, false);
if (vf->output) {
double pts = vf->output->pts;
// Always add these; they make backstepping after seeking faster.
add_frame_pts(mpctx, pts);
bool drop = false;
bool hrseek = mpctx->hrseek_active && mpctx->video_status == STATUS_SYNCING
&& !mpctx->d_video->header->attached_picture;
if (hrseek && pts < mpctx->hrseek_pts - .005)
drop = true;
if (endpts != MP_NOPTS_VALUE && pts >= endpts) {
drop = true;
r = VD_EOF;
}
if (drop) {
talloc_free(vf->output);
vf->output = NULL;
return r;
}
}
// Queue new frame, if there's one.
struct mp_image *img = vf_read_output_frame(vf);
if (img) {
int pos = mpctx->next_frame[0] ? 1 : 0;
assert(!mpctx->next_frame[pos]);
mpctx->next_frame[pos] = img;
return VD_NEW_FRAME;
}
return r; // includes the true EOF case
}
/* 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 v_pts, double frame_time)
{
struct MPOpts *opts = mpctx->opts;
if (mpctx->audio_status != STATUS_PLAYING)
return;
double a_pts = written_audio_pts(mpctx) - mpctx->delay;
double av_delay = a_pts - v_pts;
// Try to sync vo_flip() so it will *finish* at given time
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;
}
// returns VD_* code
static int update_video(struct MPContext *mpctx, double endpts)
{
struct vo *vo = mpctx->video_out;
bool eof = false;
int r = VD_PROGRESS;
if (mpctx->d_video->header->attached_picture) {
if (vo_has_frame(vo))
return VD_EOF;
if (mpctx->next_frame[0]) {
mpctx->video_next_pts = MP_NOPTS_VALUE;
return VD_NEW_FRAME;
}
r = video_output_image(mpctx, MP_NOPTS_VALUE);
return r <= 0 ? VD_EOF: VD_PROGRESS;
}
//bool vo_framedrop = !!mpctx->video_out->driver->flip_page_timed;
bool vo_framedrop = !!(mpctx->opts->frame_dropping & 1);
int min_frames = vo_framedrop ? 2 : 1; // framedrop needs duration
// Already enough video buffered?
if (!mpctx->next_frame[min_frames - 1]) {
r = video_output_image(mpctx, endpts);
if (r < 0 || r == VD_WAIT)
return r;
eof = r == VD_EOF;
}
// On EOF, we write the remaining frames; otherwise we must ensure that
// we have a frame (and with VO framedropping, the frame after that).
if (eof)
min_frames = 1;
if (!mpctx->next_frame[min_frames - 1])
return eof ? VD_EOF : VD_PROGRESS;
if (r == VD_NEW_FRAME) {
double pts = mpctx->next_frame[0]->pts;
double last_pts = mpctx->video_next_pts;
if (last_pts == MP_NOPTS_VALUE)
last_pts = pts;
double frame_time = pts - last_pts;
if (frame_time < 0 || frame_time >= 60) {
// Assume a PTS difference >= 60 seconds is a discontinuity.
MP_WARN(mpctx, "Jump in video pts: %f -> %f\n", last_pts, pts);
frame_time = 0;
}
mpctx->video_next_pts = pts;
if (mpctx->d_audio)
mpctx->delay -= frame_time;
if (mpctx->video_status >= STATUS_READY) {
mpctx->time_frame += frame_time / mpctx->opts->playback_speed;
adjust_sync(mpctx, pts, frame_time);
}
MP_TRACE(mpctx, "frametime=%5.3f\n", frame_time);
}
return VD_NEW_FRAME;
}
/* Update avsync before a new video frame is displayed. Actually, this can be
* called arbitrarily often before the actual display.
* This adjusts the time of the next video frame */
static void update_avsync_before_frame(struct MPContext *mpctx)
{
struct MPOpts *opts = mpctx->opts;
struct vo *vo = mpctx->video_out;
if (!mpctx->sync_audio_to_video || mpctx->video_status < STATUS_READY) {
mpctx->time_frame = 0;
} else if (mpctx->audio_status == STATUS_PLAYING &&
mpctx->video_status == STATUS_PLAYING &&
!ao_untimed(mpctx->ao))
{
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->driver->untimed)
mpctx->time_frame = 0;
}
}
// Update the A/V sync difference after a video frame has been shown.
static void update_avsync_after_frame(struct MPContext *mpctx)
{
if (mpctx->audio_status != STATUS_PLAYING ||
mpctx->video_status != STATUS_PLAYING)
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;
}
}
void write_video(struct MPContext *mpctx, double endpts)
{
struct MPOpts *opts = mpctx->opts;
struct vo *vo = mpctx->video_out;
if (!mpctx->d_video)
return;
// Actual playback starts when both audio and video are ready.
if (mpctx->video_status == STATUS_READY)
return;
if (mpctx->paused && mpctx->video_status >= STATUS_READY)
return;
update_fps(mpctx);
int r = update_video(mpctx, endpts);
MP_TRACE(mpctx, "update_video: %d\n", r);
if (r == VD_WAIT) // Demuxer will wake us up for more packets to decode.
return;
if (r < 0)
goto error;
if (r == VD_EOF && vo_still_displaying(vo)) {
mpctx->video_status = STATUS_DRAINING;
return;
}
if (r == VD_NEW_FRAME) {
if (mpctx->video_status > STATUS_PLAYING)
mpctx->video_status = STATUS_PLAYING;
} else if (r <= 0) {
// EOF or error
mpctx->delay = 0;
mpctx->last_av_difference = 0;
mpctx->video_status = STATUS_EOF;
MP_VERBOSE(mpctx, "video EOF\n");
return;
} else {
if (mpctx->video_status > STATUS_PLAYING)
mpctx->video_status = STATUS_PLAYING;
// Decode more in next iteration.
mpctx->sleeptime = 0;
MP_TRACE(mpctx, "filtering more video\n");
}
mpctx->time_frame -= get_relative_time(mpctx);
update_avsync_before_frame(mpctx);
if (r != VD_NEW_FRAME)
return;
// Filter output is different from VO input?
struct mp_image_params p = mpctx->next_frame[0]->params;
if (!vo->params || !mp_image_params_equal(&p, vo->params)) {
// Changing config deletes the current frame; wait until it's finished.
if (vo_still_displaying(vo))
return;
const struct vo_driver *info = mpctx->video_out->driver;
MP_INFO(mpctx, "VO: [%s] %dx%d => %dx%d %s\n",
info->name, p.w, p.h, p.d_w, p.d_h, vo_format_name(p.imgfmt));
MP_VERBOSE(mpctx, "VO: Description: %s\n", info->description);
int vo_r = vo_reconfig(vo, &p, 0);
if (vo_r < 0)
goto error;
init_vo(mpctx);
mpctx->time_frame = 0; // display immediately
}
double time_frame = MPMAX(mpctx->time_frame, -1);
int64_t pts = mp_time_us() + (int64_t)(time_frame * 1e6);
if (!vo_is_ready_for_frame(vo, pts))
return; // wait until VO wakes us up to get more frames
int64_t duration = -1;
double diff = -1;
double vpts0 = mpctx->next_frame[0] ? mpctx->next_frame[0]->pts : MP_NOPTS_VALUE;
double vpts1 = mpctx->next_frame[1] ? mpctx->next_frame[1]->pts : MP_NOPTS_VALUE;
if (vpts0 != MP_NOPTS_VALUE && vpts1 != MP_NOPTS_VALUE)
diff = vpts1 - vpts0;
if (diff < 0 && mpctx->d_video->fps > 0)
diff = 1.0 / mpctx->d_video->fps; // fallback to demuxer-reported fps
if (diff >= 0) {
// expected A/V sync correction is ignored
diff /= opts->playback_speed;
if (mpctx->time_frame < 0)
diff += mpctx->time_frame;
duration = MPCLAMP(diff, 0, 10) * 1e6;
}
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);
vo_queue_frame(vo, mpctx->next_frame[0], pts, duration);
mpctx->next_frame[0] = mpctx->next_frame[1];
mpctx->next_frame[1] = NULL;
// For print_status - VO call finishing early is OK for sync
mpctx->time_frame -= get_relative_time(mpctx);
mpctx->shown_vframes++;
if (mpctx->video_status < STATUS_PLAYING) {
mpctx->video_status = STATUS_READY;
// After a seek, make sure to wait until the first frame is visible.
vo_wait_frame(vo);
}
update_avsync_after_frame(mpctx);
screenshot_flip(mpctx);
mp_notify(mpctx, MPV_EVENT_TICK, NULL);
if (!mpctx->sync_audio_to_video)
mpctx->video_status = STATUS_EOF;
if (mpctx->video_status != STATUS_EOF) {
if (mpctx->step_frames > 0) {
mpctx->step_frames--;
if (!mpctx->step_frames && !opts->pause)
pause_player(mpctx);
}
if (mpctx->max_frames == 0)
mpctx->stop_play = PT_NEXT_ENTRY;
if (mpctx->max_frames > 0)
mpctx->max_frames--;
}
return;
error:
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);
mpctx->sleeptime = 0;
}
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