From 584b0fbe4b6ae4c6a5fadefda0c59889c7238cc7 Mon Sep 17 00:00:00 2001 From: Diederick Niehorster Date: Tue, 21 Dec 2021 14:53:28 +0100 Subject: [PATCH] avdevice/dshow: query graph and sample time only once No need to query twice, use value we've already unconditionally got. Improve variable names Signed-off-by: Diederick Niehorster Reviewed-by: Roger Pack --- libavdevice/dshow_pin.c | 28 ++++++++++++++++------------ 1 file changed, 16 insertions(+), 12 deletions(-) diff --git a/libavdevice/dshow_pin.c b/libavdevice/dshow_pin.c index 8e56dccbfe..1d0e880480 100644 --- a/libavdevice/dshow_pin.c +++ b/libavdevice/dshow_pin.c @@ -295,9 +295,10 @@ long ff_dshow_meminputpin_Receive(DShowMemInputPin *this, IMediaSample *sample) uint8_t *buf; int buf_size; /* todo should be a long? */ int index; - int64_t curtime; - int64_t orig_curtime; + int64_t chosentime; + int64_t sampletime; int64_t graphtime; + int use_sample_time = 1; const char *devtypename = (devtype == VideoDevice) ? "video" : "audio"; IReferenceClock *clock = pin->filter->clock; int64_t dummy; @@ -313,24 +314,27 @@ long ff_dshow_meminputpin_Receive(DShowMemInputPin *this, IMediaSample *sample) s = priv_data; ctx = s->priv_data; - IMediaSample_GetTime(sample, &orig_curtime, &dummy); - orig_curtime += pin->filter->start_time; + IMediaSample_GetTime(sample, &sampletime, &dummy); IReferenceClock_GetTime(clock, &graphtime); if (devtype == VideoDevice && !ctx->use_video_device_timestamps) { /* PTS from video devices is unreliable. */ - IReferenceClock_GetTime(clock, &curtime); + chosentime = graphtime; + use_sample_time = 0; } else { - IMediaSample_GetTime(sample, &curtime, &dummy); - if(curtime > 400000000000000000LL) { + if (sampletime > 400000000000000000LL) { /* initial frames sometimes start < 0 (shown as a very large number here, - like 437650244077016960 which FFmpeg doesn't like. + like 437650244077016960 which FFmpeg doesn't like). TODO figure out math. For now just drop them. */ av_log(NULL, AV_LOG_DEBUG, - "dshow dropping initial (or ending) frame with odd PTS too high %"PRId64"\n", curtime); + "dshow dropping initial (or ending) frame with odd PTS too high %"PRId64"\n", sampletime); return S_OK; } - curtime += pin->filter->start_time; + chosentime = sampletime; } + // media sample time is relative to graph start time + sampletime += pin->filter->start_time; + if (use_sample_time) + chosentime += pin->filter->start_time; buf_size = IMediaSample_GetActualDataLength(sample); IMediaSample_GetPointer(sample, &buf); @@ -338,8 +342,8 @@ long ff_dshow_meminputpin_Receive(DShowMemInputPin *this, IMediaSample *sample) av_log(NULL, AV_LOG_VERBOSE, "dshow passing through packet of type %s size %8d " "timestamp %"PRId64" orig timestamp %"PRId64" graph timestamp %"PRId64" diff %"PRId64" %s\n", - devtypename, buf_size, curtime, orig_curtime, graphtime, graphtime - orig_curtime, ctx->device_name[devtype]); - pin->filter->callback(priv_data, index, buf, buf_size, curtime, devtype); + devtypename, buf_size, chosentime, sampletime, graphtime, graphtime - sampletime, ctx->device_name[devtype]); + pin->filter->callback(priv_data, index, buf, buf_size, chosentime, devtype); return S_OK; }