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mpv/player/video.c
wm4 0739cfc209 vo: change internal API for drawing frames 
draw_image_timed is renamed to draw_frame. struct frame_timing is
renamed to vo_frame. flip_page_timed is merged into draw_frame (the
additional parameters are part of struct vo_frame). draw_frame also
deprecates VOCTRL_REDRAW_FRAME, and replaces it with a method that
works for both VOs which can cache the current frame, and VOs which
need to redraw it anyway.

This is preparation to making the interpolation and (work in progress)
display sync code saner.

Lots of other refactoring, and also some simplifications.
2015-07-01 22:38:02 +02:00

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/*
* This file is part of mpv.
*
* mpv is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 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 General Public License for more details.
*
* You should have received a copy of the GNU 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 "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
VD_RECONFIG = 4,
};
static const char av_desync_help_text[] =
"\n"
"Audio/Video desynchronisation detected! Possible reasons include too slow\n"
"hardware, temporary CPU spikes, broken drivers, and broken files. Audio\n"
"position will not match to the video (see A-V status field).\n"
"\n";
static bool decode_coverart(struct dec_video *d_video);
static void set_allowed_vo_formats(struct vf_chain *c, struct vo *vo)
{
vo_query_formats(vo, c->allowed_output_formats);
}
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 *args[] = {"angle", "auto", NULL};
if (try_filter(mpctx, params, "rotate", "autorotate", args) >= 0) {
params.rotate = 0;
} else {
MP_ERR(mpctx, "Can't insert rotation filter.\n");
}
}
}
if (params.stereo_in != params.stereo_out &&
params.stereo_in > 0 && params.stereo_out >= 0)
{
char *to = (char *)MP_STEREO3D_NAME(params.stereo_out);
if (to) {
char *args[] = {"in", "auto", "out", to, NULL, NULL};
if (try_filter(mpctx, params, "stereo3d", "stereo3d", args) < 0)
MP_ERR(mpctx, "Can't insert 3D conversion 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;
d_video->vfilter->wakeup_callback = wakeup_playloop;
d_video->vfilter->wakeup_callback_ctx = mpctx;
d_video->vfilter->container_fps = d_video->fps;
vo_control(mpctx->video_out, VOCTRL_GET_DISPLAY_FPS,
&d_video->vfilter->display_fps);
vf_append_filter_list(d_video->vfilter, opts->vf_settings);
// for vf_sub
osd_set_render_subs_in_filter(mpctx->osd,
vf_control_any(d_video->vfilter, VFCTRL_INIT_OSD, mpctx->osd) > 0);
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);
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);
for (int n = 0; n < mpctx->num_next_frames; n++)
mp_image_unrefp(&mpctx->next_frames[n]);
mpctx->num_next_frames = 0;
mp_image_unrefp(&mpctx->saved_frame);
mpctx->delay = 0;
mpctx->time_frame = 0;
mpctx->video_pts = MP_NOPTS_VALUE;
mpctx->video_next_pts = MP_NOPTS_VALUE;
mpctx->total_avsync_change = 0;
mpctx->last_av_difference = 0;
mpctx->dropped_frames_total = 0;
mpctx->dropped_frames = 0;
mpctx->drop_message_shown = 0;
mpctx->video_status = mpctx->d_video ? STATUS_SYNCING : STATUS_EOF;
}
void uninit_video_out(struct MPContext *mpctx)
{
uninit_video_chain(mpctx);
if (mpctx->video_out)
vo_destroy(mpctx->video_out);
mpctx->video_out = NULL;
mp_notify(mpctx, MPV_EVENT_VIDEO_RECONFIG, NULL);
}
void uninit_video_chain(struct MPContext *mpctx)
{
if (mpctx->d_video) {
reset_video_state(mpctx);
video_uninit(mpctx->d_video);
mpctx->d_video = NULL;
mpctx->video_status = STATUS_EOF;
mpctx->sync_audio_to_video = false;
reselect_demux_streams(mpctx);
}
mp_notify(mpctx, MPV_EVENT_VIDEO_RECONFIG, NULL);
}
int reinit_video_chain(struct MPContext *mpctx)
{
struct MPOpts *opts = mpctx->opts;
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;
if (!mpctx->video_out) {
struct vo_extra ex = {
.input_ctx = mpctx->input,
.osd = mpctx->osd,
.encode_lavc_ctx = mpctx->encode_lavc_ctx,
.opengl_cb_context = mpctx->gl_cb_ctx,
};
mpctx->video_out = init_best_video_out(mpctx->global, &ex);
if (!mpctx->video_out) {
MP_FATAL(mpctx, "Error opening/initializing "
"the selected video_out (-vo) device.\n");
mpctx->error_playing = MPV_ERROR_VO_INIT_FAILED;
goto err_out;
}
mpctx->mouse_cursor_visible = true;
}
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;
MP_VERBOSE(d_video, "Container reported FPS: %f\n", sh->video->fps);
if (opts->force_fps) {
d_video->fps = opts->force_fps;
MP_INFO(mpctx, "FPS forced to %5.3f.\n", d_video->fps);
MP_INFO(mpctx, "Use --no-correct-pts to force FPS based timing.\n");
}
#if HAVE_ENCODING
if (mpctx->encode_lavc_ctx && d_video)
encode_lavc_set_video_fps(mpctx->encode_lavc_ctx, d_video->fps);
#endif
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;
if (d_video->header->attached_picture && !decode_coverart(d_video))
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);
return 1;
err_out:
no_video:
uninit_video_chain(mpctx);
if (track)
error_on_track(mpctx, track);
handle_force_window(mpctx, true);
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,
MPSEEK_VERY_EXACT, 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 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 (mpctx->last_av_difference - 0.100 > mpctx->dropped_frames * frame_time)
return !!(opts->frame_dropping & 2);
}
return 0;
}
static bool decode_coverart(struct dec_video *d_video)
{
d_video->cover_art_mpi =
video_decode(d_video, d_video->header->attached_picture, 0);
// Might need flush.
if (!d_video->cover_art_mpi)
d_video->cover_art_mpi = video_decode(d_video, NULL, 0);
return !!d_video->cover_art_mpi;
}
// 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 = mp_image_new_ref(d_video->cover_art_mpi);
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->dts != MP_NOPTS_VALUE)
pkt->dts += 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);
if (had_packet && !d_video->waiting_decoded_mpi &&
mpctx->video_status == STATUS_PLAYING &&
(mpctx->opts->frame_dropping & 2))
{
mpctx->dropped_frames_total++;
mpctx->dropped_frames++;
}
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);
}
// Feed newly decoded frames to the filter, take care of format changes.
// If eof=true, drain the filter chain, and return VD_EOF if empty.
static int video_filter(struct MPContext *mpctx, bool eof)
{
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_needs_input() returns > 0, the filter wants input anyway.
if (vf_output_frame(vf, eof) > 0 && vf_needs_input(vf) < 1)
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_RECONFIG;
}
// 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;
}
return eof ? VD_EOF : VD_PROGRESS;
}
// Make sure at least 1 filtered image is available, decode new video if needed.
// 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;
int r = video_filter(mpctx, false);
if (r < 0)
return r;
if (!d_video->waiting_decoded_mpi) {
// Decode a new image, or at least feed the decoder a packet.
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;
}
bool eof = !d_video->waiting_decoded_mpi && (r == VD_EOF || r < 0);
r = video_filter(mpctx, eof);
if (r == VD_RECONFIG) // retry feeding decoded image
r = video_filter(mpctx, eof);
return r;
}
static int video_feed_async_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;
if (vf_needs_input(vf) < 1)
return 0;
mpctx->sleeptime = 0; // retry until done
return video_decode_and_filter(mpctx);
}
/* 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) + opts->audio_delay - mpctx->delay;
double av_delay = a_pts - v_pts;
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;
}
// Make the frame at position 0 "known" to the playback logic. This must happen
// only once for each frame, so this function has to be called carefully.
// Generally, if position 0 gets a new frame, this must be called.
static void handle_new_frame(struct MPContext *mpctx)
{
assert(mpctx->num_next_frames >= 1);
double frame_time = 0;
double pts = mpctx->next_frames[0]->pts;
if (mpctx->video_pts != MP_NOPTS_VALUE) {
frame_time = pts - mpctx->video_pts;
double tolerance = 15;
if (mpctx->demuxer->ts_resets_possible) {
// Fortunately no real framerate is likely to go below this. It
// still could be that the file is VFR, but the demuxer reports a
// higher rate, so account for the case of e.g. 60hz demuxer fps
// but 23hz actual fps.
double fps = 23.976;
if (mpctx->d_video->fps > 0 && mpctx->d_video->fps < fps)
fps = mpctx->d_video->fps;
tolerance = 3 * 1.0 / fps;
}
if (frame_time <= 0 || frame_time >= tolerance) {
// Assume a discontinuity.
MP_WARN(mpctx, "Invalid video timestamp: %f -> %f\n",
mpctx->video_pts, pts);
frame_time = 0;
mpctx->audio_status = STATUS_SYNCING;
}
}
mpctx->video_next_pts = pts;
mpctx->delay -= frame_time;
if (mpctx->video_status >= STATUS_PLAYING) {
mpctx->time_frame += frame_time / mpctx->opts->playback_speed;
adjust_sync(mpctx, pts, frame_time);
}
mpctx->dropped_frames = 0;
MP_TRACE(mpctx, "frametime=%5.3f\n", frame_time);
}
// Remove the first frame in mpctx->next_frames
static void shift_frames(struct MPContext *mpctx)
{
if (mpctx->num_next_frames < 1)
return;
talloc_free(mpctx->next_frames[0]);
for (int n = 0; n < mpctx->num_next_frames - 1; n++)
mpctx->next_frames[n] = mpctx->next_frames[n + 1];
mpctx->num_next_frames -= 1;
}
static int get_req_frames(struct MPContext *mpctx, bool eof)
{
struct MPOpts *opts = mpctx->opts;
// On EOF, drain all frames.
// On the first frame, output a new frame as quickly as possible.
if (eof || mpctx->video_pts == MP_NOPTS_VALUE)
return 1;
int req = 1 + vo_get_num_future_frames(mpctx->video_out);
if (opts->frame_dropping & 1)
req = MPMAX(req, 2);
return req;
}
// Whether it's fine to call add_new_frame() now.
static bool needs_new_frame(struct MPContext *mpctx)
{
return mpctx->num_next_frames < get_req_frames(mpctx, false);
}
// Queue a frame to mpctx->next_frames[]. Call only if needs_new_frame() signals ok.
static void add_new_frame(struct MPContext *mpctx, struct mp_image *frame)
{
assert(needs_new_frame(mpctx));
assert(frame);
mpctx->next_frames[mpctx->num_next_frames++] = frame;
if (mpctx->num_next_frames == 1)
handle_new_frame(mpctx);
}
// Enough video filtered already to push one frame to the VO?
// Set eof to true if no new frames are to be expected.
static bool have_new_frame(struct MPContext *mpctx, bool eof)
{
return mpctx->num_next_frames >= get_req_frames(mpctx, eof);
}
// Fill mpctx->next_frames[] with a newly filtered or decoded image.
// returns VD_* code
static int video_output_image(struct MPContext *mpctx, double endpts)
{
bool hrseek = mpctx->hrseek_active && mpctx->video_status == STATUS_SYNCING;
if (mpctx->d_video->header->attached_picture) {
if (vo_has_frame(mpctx->video_out))
return VD_EOF;
if (mpctx->num_next_frames >= 1)
return VD_NEW_FRAME;
int r = video_decode_and_filter(mpctx);
video_filter(mpctx, true); // force EOF filtering (avoid decoding more)
mpctx->next_frames[0] = vf_read_output_frame(mpctx->d_video->vfilter);
if (mpctx->next_frames[0]) {
mpctx->next_frames[0]->pts = MP_NOPTS_VALUE;
mpctx->num_next_frames = 1;
}
return r <= 0 ? VD_EOF : VD_PROGRESS;
}
if (have_new_frame(mpctx, false))
return VD_NEW_FRAME;
// Get a new frame if we need one.
int r = VD_PROGRESS;
if (needs_new_frame(mpctx)) {
// Filter a new frame.
r = video_decode_and_filter(mpctx);
if (r < 0)
return r; // error
struct mp_image *img = vf_read_output_frame(mpctx->d_video->vfilter);
if (img) {
// Always add these; they make backstepping after seeking faster.
add_frame_pts(mpctx, img->pts);
if (endpts != MP_NOPTS_VALUE && img->pts >= endpts) {
r = VD_EOF;
} else if (mpctx->max_frames == 0) {
r = VD_EOF;
} else if (hrseek && mpctx->hrseek_lastframe) {
mp_image_setrefp(&mpctx->saved_frame, img);
} else if (hrseek && img->pts < mpctx->hrseek_pts - .005) {
/* just skip */
} else {
add_new_frame(mpctx, img);
img = NULL;
}
talloc_free(img);
}
}
// Last-frame seek
if (r <= 0 && hrseek && mpctx->hrseek_lastframe && mpctx->saved_frame) {
add_new_frame(mpctx, mpctx->saved_frame);
mpctx->saved_frame = NULL;
r = VD_PROGRESS;
}
return have_new_frame(mpctx, r <= 0) ? VD_NEW_FRAME : r;
}
/* 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);
double predicted = mpctx->delay / opts->playback_speed +
mpctx->time_frame;
double difference = buffered_audio - predicted;
MP_STATS(mpctx, "value %f audio-diff", difference);
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). */
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)
{
struct MPOpts *opts = mpctx->opts;
mpctx->last_av_difference = 0;
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 + opts->audio_delay;
if (mpctx->time_frame > 0)
mpctx->last_av_difference += mpctx->time_frame * opts->playback_speed;
if (a_pos == MP_NOPTS_VALUE || mpctx->video_pts == MP_NOPTS_VALUE) {
mpctx->last_av_difference = 0;
} else if (fabs(mpctx->last_av_difference) > 0.5 && !mpctx->drop_message_shown) {
MP_WARN(mpctx, "%s", av_desync_help_text);
mpctx->drop_message_shown = true;
}
}
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);
}
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;
int r = video_output_image(mpctx, endpts);
MP_TRACE(mpctx, "video_output_image: %d\n", r);
if (r < 0)
goto error;
if (r == VD_WAIT) // Demuxer will wake us up for more packets to decode.
return;
if (r == VD_EOF) {
mpctx->video_status =
vo_still_displaying(vo) ? STATUS_DRAINING : STATUS_EOF;
mpctx->delay = 0;
mpctx->last_av_difference = 0;
MP_DBG(mpctx, "video EOF (status=%d)\n", mpctx->video_status);
return;
}
if (mpctx->video_status > STATUS_PLAYING)
mpctx->video_status = STATUS_PLAYING;
if (r != VD_NEW_FRAME) {
mpctx->sleeptime = 0; // Decode more in next iteration.
return;
}
// Filter output is different from VO input?
struct mp_image_params p = mpctx->next_frames[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;
char extra[20] = {0};
if (p.w != p.d_w || p.h != p.d_h)
snprintf(extra, sizeof(extra), " => %dx%d", p.d_w, p.d_h);
MP_INFO(mpctx, "VO: [%s] %dx%d%s %s\n",
info->name, p.w, p.h, extra, 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) {
mpctx->error_playing = MPV_ERROR_VO_INIT_FAILED;
goto error;
}
init_vo(mpctx);
}
mpctx->time_frame -= get_relative_time(mpctx);
update_avsync_before_frame(mpctx);
double time_frame = MPMAX(mpctx->time_frame, -1);
int64_t pts = mp_time_us() + (int64_t)(time_frame * 1e6);
// wait until VO wakes us up to get more frames
if (!vo_is_ready_for_frame(vo, pts)) {
if (video_feed_async_filter(mpctx) < 0)
goto error;
return;
}
int64_t duration = -1;
double diff = -1;
assert(mpctx->num_next_frames >= 1);
double vpts0 = mpctx->next_frames[0]->pts;
double vpts1 = MP_NOPTS_VALUE;
if (mpctx->num_next_frames >= 2)
vpts1 = mpctx->next_frames[1]->pts;
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 (opts->untimed || vo->driver->untimed)
diff = -1; // disable frame dropping and aspects of frame timing
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->next_frames[0]->pts;
mpctx->last_vo_pts = mpctx->video_pts;
mpctx->playback_pts = mpctx->video_pts;
update_avsync_after_frame(mpctx);
mpctx->osd_force_update = true;
update_osd_msg(mpctx);
update_subtitles(mpctx);
assert(mpctx->num_next_frames >= 1);
struct vo_frame dummy = {
.pts = pts,
.duration = duration,
.num_frames = mpctx->num_next_frames,
};
for (int n = 0; n < dummy.num_frames; n++)
dummy.frames[n] = mpctx->next_frames[n];
vo_queue_frame(vo, vo_frame_ref(&dummy));
shift_frames(mpctx);
// The frames were shifted down; "initialize" the new first entry.
if (mpctx->num_next_frames >= 1)
handle_new_frame(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);
MP_VERBOSE(mpctx, "first video frame after restart shown\n");
}
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 = AT_END_OF_FILE;
if (mpctx->max_frames > 0)
mpctx->max_frames--;
}
mpctx->sleeptime = 0;
return;
error:
MP_FATAL(mpctx, "Could not initialize video chain.\n");
uninit_video_chain(mpctx);
error_on_track(mpctx, mpctx->current_track[STREAM_VIDEO][0]);
handle_force_window(mpctx, true);
mpctx->sleeptime = 0;
}
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