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avdevice: use av_gettime_relative() for elapsed time calculations 

av_gettime_relative() is using the monotonic clock therefore more suitable for
elapsed time calculations. Packet timestamps are still kept absolute, although
that should be configurable in the future.

Related to ticket #9089.

Signed-off-by: Marton Balint <cus@passwd.hu>
This commit is contained in:
Marton Balint 2021-02-07 00:55:25 +01:00
parent 529bf5daf2
commit 2d32aed85c
5 changed files with 15 additions and 13 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

4
libavdevice/bktr.c
View File

@ -225,14 +225,14 @@ static void bktr_getframe(uint64_t per_frame)
{
uint64_t curtime;
curtime = av_gettime();
curtime = av_gettime_relative();
if (!last_frame_time
|| ((last_frame_time + per_frame) > curtime)) {
if (!usleep(last_frame_time + per_frame + per_frame / 8 - curtime)) {
if (!nsignals)
av_log(NULL, AV_LOG_INFO,
"SLEPT NO signals - %d microseconds late\n",
(int)(av_gettime() - last_frame_time - per_frame));
(int)(av_gettime_relative() - last_frame_time - per_frame));
}
}
nsignals = 0;

6
libavdevice/fbdev_dec.c
View File

@ -157,11 +157,11 @@ static int fbdev_read_packet(AVFormatContext *avctx, AVPacket *pkt)
uint8_t *pin, *pout;
if (fbdev->time_frame == AV_NOPTS_VALUE)
fbdev->time_frame = av_gettime();
fbdev->time_frame = av_gettime_relative();
/* wait based on the frame rate */
while (1) {
curtime = av_gettime();
curtime = av_gettime_relative();
delay = fbdev->time_frame - curtime;
av_log(avctx, AV_LOG_TRACE,
"time_frame:%"PRId64" curtime:%"PRId64" delay:%"PRId64"\n",
@ -186,7 +186,7 @@ static int fbdev_read_packet(AVFormatContext *avctx, AVPacket *pkt)
"Error refreshing variable info: %s\n", av_err2str(AVERROR(errno)));
}
pkt->pts = curtime;
pkt->pts = av_gettime();
/* compute visible data offset */
pin = fbdev->data + fbdev->bytes_per_pixel * fbdev->varinfo.xoffset +

6
libavdevice/gdigrab.c
View File

@ -394,7 +394,7 @@ gdigrab_read_header(AVFormatContext *s1)
gdigrab->header_size = sizeof(BITMAPFILEHEADER) + sizeof(BITMAPINFOHEADER) +
(bpp <= 8 ? (1 << bpp) : 0) * sizeof(RGBQUAD) /* palette size */;
gdigrab->time_base = av_inv_q(gdigrab->framerate);
gdigrab->time_frame = av_gettime() / av_q2d(gdigrab->time_base);
gdigrab->time_frame = av_gettime_relative() / av_q2d(gdigrab->time_base);
gdigrab->hwnd = hwnd;
gdigrab->source_hdc = source_hdc;
@ -551,7 +551,7 @@ static int gdigrab_read_packet(AVFormatContext *s1, AVPacket *pkt)
/* wait based on the frame rate */
for (;;) {
curtime = av_gettime();
curtime = av_gettime_relative();
delay = time_frame * av_q2d(time_base) - curtime;
if (delay <= 0) {
if (delay < INT64_C(-1000000) * av_q2d(time_base)) {
@ -568,7 +568,7 @@ static int gdigrab_read_packet(AVFormatContext *s1, AVPacket *pkt)
if (av_new_packet(pkt, file_size) < 0)
return AVERROR(ENOMEM);
pkt->pts = curtime;
pkt->pts = av_gettime();
/* Blit screen grab */
if (!BitBlt(dest_hdc, 0, 0,

5
libavdevice/kmsgrab.c
View File

@ -268,7 +268,7 @@ static int kmsgrab_read_packet(AVFormatContext *avctx, AVPacket *pkt)
int64_t now;
int err;
now = av_gettime();
now = av_gettime_relative();
if (ctx->frame_last) {
int64_t delay;
while (1) {
@ -276,10 +276,11 @@ static int kmsgrab_read_packet(AVFormatContext *avctx, AVPacket *pkt)
if (delay <= 0)
break;
av_usleep(delay);
now = av_gettime();
now = av_gettime_relative();
}
}
ctx->frame_last = now;
now = av_gettime();
plane = drmModeGetPlane(ctx->hwctx->fd, ctx->plane_id);
if (!plane) {

7
libavdevice/xcbgrab.c
View File

@ -206,7 +206,7 @@ static int64_t wait_frame(AVFormatContext *s, AVPacket *pkt)
c->time_frame += c->frame_duration;
for (;;) {
curtime = av_gettime();
curtime = av_gettime_relative();
delay = c->time_frame - curtime;
if (delay <= 0)
break;
@ -422,7 +422,8 @@ static int xcbgrab_read_packet(AVFormatContext *s, AVPacket *pkt)
int ret = 0;
int64_t pts;
pts = wait_frame(s, pkt);
wait_frame(s, pkt);
pts = av_gettime();
if (c->follow_mouse || c->draw_mouse) {
pc = xcb_query_pointer(c->conn, c->screen->root);
@ -596,7 +597,7 @@ static int create_stream(AVFormatContext *s)
c->time_base = (AVRational){ st->avg_frame_rate.den,
st->avg_frame_rate.num };
c->frame_duration = av_rescale_q(1, c->time_base, AV_TIME_BASE_Q);
c->time_frame = av_gettime();
c->time_frame = av_gettime_relative();
ret = pixfmt_from_pixmap_format(s, geo->depth, &st->codecpar->format, &c->bpp);
free(geo);