static GstClockTime gst_alsasrc_get_timestamp (GstAlsaSrc * asrc) { snd_pcm_status_t *status; snd_htimestamp_t tstamp; GstClockTime timestamp; snd_pcm_uframes_t avail; gint err = -EPIPE; if (G_UNLIKELY (!asrc)) { GST_ERROR_OBJECT (asrc, "No alsa handle created yet !"); return GST_CLOCK_TIME_NONE; } if (G_UNLIKELY (snd_pcm_status_malloc (&status) != 0)) { GST_ERROR_OBJECT (asrc, "snd_pcm_status_malloc failed"); return GST_CLOCK_TIME_NONE; } if (G_UNLIKELY (snd_pcm_status (asrc->handle, status) != 0)) { GST_ERROR_OBJECT (asrc, "snd_pcm_status failed"); return GST_CLOCK_TIME_NONE; } /* in case an xrun condition has occured we need to handle this */ if (snd_pcm_status_get_state (status) != SND_PCM_STATE_RUNNING) { if (xrun_recovery (asrc, asrc->handle, err) < 0) { GST_WARNING_OBJECT (asrc, "Could not recover from xrun condition !"); } /* reload the status alsa status object, since recovery made it invalid */ if (G_UNLIKELY (snd_pcm_status (asrc->handle, status) != 0)) { GST_ERROR_OBJECT (asrc, "snd_pcm_status failed"); } } /* get high resolution time stamp from driver */ snd_pcm_status_get_htstamp (status, &tstamp); timestamp = GST_TIMESPEC_TO_TIME (tstamp); /* max available frames sets the depth of the buffer */ avail = snd_pcm_status_get_avail (status); /* calculate the timestamp of the next sample to be read */ timestamp -= gst_util_uint64_scale_int (avail, GST_SECOND, asrc->rate); /* compensate for the fact that we really need the timestamp of the * previously read data segment */ timestamp -= asrc->period_time * 1000; snd_pcm_status_free (status); GST_LOG_OBJECT (asrc, "ALSA timestamp : %" GST_TIME_FORMAT ", delay %lu", GST_TIME_ARGS (timestamp), avail); return timestamp; }
static GstFlowReturn gst_v4l2src_create (GstPushSrc * src, GstBuffer ** buf) { GstV4l2Src *v4l2src = GST_V4L2SRC (src); GstV4l2Object *obj = v4l2src->v4l2object; GstV4l2BufferPool *pool = GST_V4L2_BUFFER_POOL_CAST (obj->pool); GstFlowReturn ret; GstClock *clock; GstClockTime abs_time, base_time, timestamp, duration; GstClockTime delay; do { ret = GST_BASE_SRC_CLASS (parent_class)->alloc (GST_BASE_SRC (src), 0, obj->info.size, buf); if (G_UNLIKELY (ret != GST_FLOW_OK)) goto alloc_failed; ret = gst_v4l2_buffer_pool_process (pool, buf); } while (ret == GST_V4L2_FLOW_CORRUPTED_BUFFER); if (G_UNLIKELY (ret != GST_FLOW_OK)) goto error; timestamp = GST_BUFFER_TIMESTAMP (*buf); duration = obj->duration; /* timestamps, LOCK to get clock and base time. */ /* FIXME: element clock and base_time is rarely changing */ GST_OBJECT_LOCK (v4l2src); if ((clock = GST_ELEMENT_CLOCK (v4l2src))) { /* we have a clock, get base time and ref clock */ base_time = GST_ELEMENT (v4l2src)->base_time; gst_object_ref (clock); } else { /* no clock, can't set timestamps */ base_time = GST_CLOCK_TIME_NONE; } GST_OBJECT_UNLOCK (v4l2src); /* sample pipeline clock */ if (clock) { abs_time = gst_clock_get_time (clock); gst_object_unref (clock); } else { abs_time = GST_CLOCK_TIME_NONE; } if (timestamp != GST_CLOCK_TIME_NONE) { struct timespec now; GstClockTime gstnow; /* v4l2 specs say to use the system time although many drivers switched to * the more desirable monotonic time. We first try to use the monotonic time * and see how that goes */ clock_gettime (CLOCK_MONOTONIC, &now); gstnow = GST_TIMESPEC_TO_TIME (now); if (gstnow < timestamp && (timestamp - gstnow) > (10 * GST_SECOND)) { GTimeVal now; /* very large diff, fall back to system time */ g_get_current_time (&now); gstnow = GST_TIMEVAL_TO_TIME (now); } if (gstnow > timestamp) { delay = gstnow - timestamp; } else { delay = 0; } GST_DEBUG_OBJECT (v4l2src, "ts: %" GST_TIME_FORMAT " now %" GST_TIME_FORMAT " delay %" GST_TIME_FORMAT, GST_TIME_ARGS (timestamp), GST_TIME_ARGS (gstnow), GST_TIME_ARGS (delay)); } else { /* we assume 1 frame latency otherwise */ if (GST_CLOCK_TIME_IS_VALID (duration)) delay = duration; else delay = 0; } /* set buffer metadata */ GST_BUFFER_OFFSET (*buf) = v4l2src->offset++; GST_BUFFER_OFFSET_END (*buf) = v4l2src->offset; if (G_LIKELY (abs_time != GST_CLOCK_TIME_NONE)) { /* the time now is the time of the clock minus the base time */ timestamp = abs_time - base_time; /* adjust for delay in the device */ if (timestamp > delay) timestamp -= delay; else timestamp = 0; } else { timestamp = GST_CLOCK_TIME_NONE; } /* activate settings for next frame */ if (GST_CLOCK_TIME_IS_VALID (duration)) { v4l2src->ctrl_time += duration; } else { /* this is not very good (as it should be the next timestamp), * still good enough for linear fades (as long as it is not -1) */ v4l2src->ctrl_time = timestamp; } gst_object_sync_values (GST_OBJECT (src), v4l2src->ctrl_time); GST_INFO_OBJECT (src, "sync to %" GST_TIME_FORMAT " out ts %" GST_TIME_FORMAT, GST_TIME_ARGS (v4l2src->ctrl_time), GST_TIME_ARGS (timestamp)); GST_BUFFER_TIMESTAMP (*buf) = timestamp; GST_BUFFER_DURATION (*buf) = duration; return ret; /* ERROR */ alloc_failed: { if (ret != GST_FLOW_FLUSHING) GST_ELEMENT_ERROR (src, RESOURCE, NO_SPACE_LEFT, ("Failed to allocate a buffer"), (NULL)); return ret; } error: { if (ret == GST_V4L2_FLOW_LAST_BUFFER) { GST_ELEMENT_ERROR (src, RESOURCE, FAILED, ("Driver returned a buffer with no payload, this most likely " "indicate a bug in the driver."), (NULL)); ret = GST_FLOW_ERROR; } else { GST_DEBUG_OBJECT (src, "error processing buffer %d (%s)", ret, gst_flow_get_name (ret)); } return ret; } }
static GstFlowReturn gst_v4l2src_create (GstPushSrc * src, GstBuffer ** buf) { GstV4l2Src *v4l2src = GST_V4L2SRC (src); GstV4l2Object *obj = v4l2src->v4l2object; GstV4l2BufferPool *pool = GST_V4L2_BUFFER_POOL_CAST (obj->pool); GstFlowReturn ret; GstClock *clock; GstClockTime abs_time, base_time, timestamp, duration; GstClockTime delay; GstMessage *qos_msg; do { ret = GST_BASE_SRC_CLASS (parent_class)->alloc (GST_BASE_SRC (src), 0, obj->info.size, buf); if (G_UNLIKELY (ret != GST_FLOW_OK)) goto alloc_failed; ret = gst_v4l2_buffer_pool_process (pool, buf); } while (ret == GST_V4L2_FLOW_CORRUPTED_BUFFER); if (G_UNLIKELY (ret != GST_FLOW_OK)) goto error; timestamp = GST_BUFFER_TIMESTAMP (*buf); duration = obj->duration; /* timestamps, LOCK to get clock and base time. */ /* FIXME: element clock and base_time is rarely changing */ GST_OBJECT_LOCK (v4l2src); if ((clock = GST_ELEMENT_CLOCK (v4l2src))) { /* we have a clock, get base time and ref clock */ base_time = GST_ELEMENT (v4l2src)->base_time; gst_object_ref (clock); } else { /* no clock, can't set timestamps */ base_time = GST_CLOCK_TIME_NONE; } GST_OBJECT_UNLOCK (v4l2src); /* sample pipeline clock */ if (clock) { abs_time = gst_clock_get_time (clock); gst_object_unref (clock); } else { abs_time = GST_CLOCK_TIME_NONE; } retry: if (!v4l2src->has_bad_timestamp && timestamp != GST_CLOCK_TIME_NONE) { struct timespec now; GstClockTime gstnow; /* v4l2 specs say to use the system time although many drivers switched to * the more desirable monotonic time. We first try to use the monotonic time * and see how that goes */ clock_gettime (CLOCK_MONOTONIC, &now); gstnow = GST_TIMESPEC_TO_TIME (now); if (timestamp > gstnow || (gstnow - timestamp) > (10 * GST_SECOND)) { GTimeVal now; /* very large diff, fall back to system time */ g_get_current_time (&now); gstnow = GST_TIMEVAL_TO_TIME (now); } /* Detect buggy drivers here, and stop using their timestamp. Failing any * of these condition would imply a very buggy driver: * - Timestamp in the future * - Timestamp is going backward compare to last seen timestamp * - Timestamp is jumping forward for less then a frame duration * - Delay is bigger then the actual timestamp * */ if (timestamp > gstnow) { GST_WARNING_OBJECT (v4l2src, "Timestamp in the future detected, ignoring driver timestamps"); v4l2src->has_bad_timestamp = TRUE; goto retry; } if (v4l2src->last_timestamp > timestamp) { GST_WARNING_OBJECT (v4l2src, "Timestamp going backward, ignoring driver timestamps"); v4l2src->has_bad_timestamp = TRUE; goto retry; } delay = gstnow - timestamp; if (delay > timestamp) { GST_WARNING_OBJECT (v4l2src, "Timestamp does not correlate with any clock, ignoring driver timestamps"); v4l2src->has_bad_timestamp = TRUE; goto retry; } /* Save last timestamp for sanity checks */ v4l2src->last_timestamp = timestamp; GST_DEBUG_OBJECT (v4l2src, "ts: %" GST_TIME_FORMAT " now %" GST_TIME_FORMAT " delay %" GST_TIME_FORMAT, GST_TIME_ARGS (timestamp), GST_TIME_ARGS (gstnow), GST_TIME_ARGS (delay)); } else { /* we assume 1 frame latency otherwise */ if (GST_CLOCK_TIME_IS_VALID (duration)) delay = duration; else delay = 0; } /* set buffer metadata */ if (G_LIKELY (abs_time != GST_CLOCK_TIME_NONE)) { /* the time now is the time of the clock minus the base time */ timestamp = abs_time - base_time; /* adjust for delay in the device */ if (timestamp > delay) timestamp -= delay; else timestamp = 0; } else { timestamp = GST_CLOCK_TIME_NONE; } /* activate settings for next frame */ if (GST_CLOCK_TIME_IS_VALID (duration)) { v4l2src->ctrl_time += duration; } else { /* this is not very good (as it should be the next timestamp), * still good enough for linear fades (as long as it is not -1) */ v4l2src->ctrl_time = timestamp; } gst_object_sync_values (GST_OBJECT (src), v4l2src->ctrl_time); GST_INFO_OBJECT (src, "sync to %" GST_TIME_FORMAT " out ts %" GST_TIME_FORMAT, GST_TIME_ARGS (v4l2src->ctrl_time), GST_TIME_ARGS (timestamp)); /* use generated offset values only if there are not already valid ones * set by the v4l2 device */ if (!GST_BUFFER_OFFSET_IS_VALID (*buf) || !GST_BUFFER_OFFSET_END_IS_VALID (*buf)) { GST_BUFFER_OFFSET (*buf) = v4l2src->offset++; GST_BUFFER_OFFSET_END (*buf) = v4l2src->offset; } else { /* adjust raw v4l2 device sequence, will restart at null in case of renegotiation * (streamoff/streamon) */ GST_BUFFER_OFFSET (*buf) += v4l2src->renegotiation_adjust; GST_BUFFER_OFFSET_END (*buf) += v4l2src->renegotiation_adjust; /* check for frame loss with given (from v4l2 device) buffer offset */ if ((v4l2src->offset != 0) && (GST_BUFFER_OFFSET (*buf) != (v4l2src->offset + 1))) { guint64 lost_frame_count = GST_BUFFER_OFFSET (*buf) - v4l2src->offset - 1; GST_WARNING_OBJECT (v4l2src, "lost frames detected: count = %" G_GUINT64_FORMAT " - ts: %" GST_TIME_FORMAT, lost_frame_count, GST_TIME_ARGS (timestamp)); qos_msg = gst_message_new_qos (GST_OBJECT_CAST (v4l2src), TRUE, GST_CLOCK_TIME_NONE, GST_CLOCK_TIME_NONE, timestamp, GST_CLOCK_TIME_IS_VALID (duration) ? lost_frame_count * duration : GST_CLOCK_TIME_NONE); gst_element_post_message (GST_ELEMENT_CAST (v4l2src), qos_msg); } v4l2src->offset = GST_BUFFER_OFFSET (*buf); } GST_BUFFER_TIMESTAMP (*buf) = timestamp; GST_BUFFER_DURATION (*buf) = duration; return ret; /* ERROR */ alloc_failed: { if (ret != GST_FLOW_FLUSHING) GST_ELEMENT_ERROR (src, RESOURCE, NO_SPACE_LEFT, ("Failed to allocate a buffer"), (NULL)); return ret; } error: { if (ret == GST_V4L2_FLOW_LAST_BUFFER) { GST_ELEMENT_ERROR (src, RESOURCE, FAILED, ("Driver returned a buffer with no payload, this most likely " "indicate a bug in the driver."), (NULL)); ret = GST_FLOW_ERROR; } else { GST_DEBUG_OBJECT (src, "error processing buffer %d (%s)", ret, gst_flow_get_name (ret)); } return ret; } }
static void do_stats (GstTracer * obj, guint64 ts) { GstRUsageTracer *self = GST_RUSAGE_TRACER_CAST (obj); GstThreadStats *stats; gpointer thread_id = g_thread_self (); guint avg_cpuload, cur_cpuload; struct rusage ru; GstClockTime tproc = G_GUINT64_CONSTANT (0); GstClockTime tthread = G_GUINT64_CONSTANT (0); GstClockTime dts, dtproc; #ifdef HAVE_CLOCK_GETTIME { struct timespec now; if (!clock_gettime (CLOCK_PROCESS_CPUTIME_ID, &now)) { tproc = GST_TIMESPEC_TO_TIME (now); } else { GST_WARNING_OBJECT (obj, "clock_gettime (CLOCK_PROCESS_CPUTIME_ID,...) failed: %s", g_strerror (errno)); getrusage (RUSAGE_SELF, &ru); tproc = GST_TIMEVAL_TO_TIME (ru.ru_utime) + GST_TIMEVAL_TO_TIME (ru.ru_stime); } /* cpu time per thread */ if (!clock_gettime (CLOCK_THREAD_CPUTIME_ID, &now)) { tthread = GST_TIMESPEC_TO_TIME (now); } else { GST_WARNING_OBJECT (obj, "clock_gettime (CLOCK_THREAD_CPUTIME_ID,...) failed: %s", g_strerror (errno)); #ifdef RUSAGE_THREAD getrusage (RUSAGE_THREAD, &ru); tthread = GST_TIMEVAL_TO_TIME (ru.ru_utime) + GST_TIMEVAL_TO_TIME (ru.ru_stime); #endif } } #else getrusage (RUSAGE_SELF, &ru); tproc = GST_TIMEVAL_TO_TIME (ru.ru_utime) + GST_TIMEVAL_TO_TIME (ru.ru_stime); #ifdef RUSAGE_THREAD getrusage (RUSAGE_THREAD, &ru); tthread = GST_TIMEVAL_TO_TIME (ru.ru_utime) + GST_TIMEVAL_TO_TIME (ru.ru_stime); #endif #endif /* get stats record for current thread */ if (!(stats = g_hash_table_lookup (self->threads, thread_id))) { stats = g_slice_new0 (GstThreadStats); stats->tvs_thread = make_trace_values (GST_SECOND); g_hash_table_insert (self->threads, thread_id, stats); } stats->tthread = tthread; /* Calibrate ts for the process and main thread. For tthread[main] and tproc * the time is larger than ts, as our base-ts is taken after the process has * started. */ if (G_UNLIKELY (thread_id == self->main_thread_id)) { self->main_thread_id = NULL; /* when the registry gets updated, the tproc is less than the debug time ? */ /* TODO(ensonic): we still see cases where tproc overtakes ts, especially * when with sync=false, can this be due to multiple cores in use? */ if (tproc > ts) { self->tproc_base = tproc - ts; GST_DEBUG ("rusage: calibrating by %" G_GUINT64_FORMAT ", thread: %" G_GUINT64_FORMAT ", proc: %" G_GUINT64_FORMAT, self->tproc_base, stats->tthread, tproc); stats->tthread -= self->tproc_base; } } /* we always need to correct proc time */ tproc -= self->tproc_base; /* FIXME: how can we take cpu-frequency scaling into account? * - looking at /sys/devices/system/cpu/cpu0/cpufreq/ * scale_factor=scaling_max_freq/scaling_cur_freq * - as a workaround we can switch it via /sys/devices/system/cpu/cpu0/cpufreq/scaling_governor * cpufreq-selector -g performance * cpufreq-selector -g ondemand */ /* *INDENT-OFF* */ avg_cpuload = (guint) gst_util_uint64_scale (stats->tthread, G_GINT64_CONSTANT (1000), ts); update_trace_value (stats->tvs_thread, ts, stats->tthread, &dts, &dtproc); cur_cpuload = (guint) gst_util_uint64_scale (dtproc, G_GINT64_CONSTANT (1000), dts); gst_tracer_record_log (tr_thread, (guint64) (guintptr) thread_id, ts, MIN (avg_cpuload, 1000), MIN (cur_cpuload, 1000), stats->tthread); avg_cpuload = (guint) gst_util_uint64_scale (tproc / num_cpus, G_GINT64_CONSTANT (1000), ts); G_LOCK (_proc); update_trace_value (self->tvs_proc, ts, tproc, &dts, &dtproc); G_UNLOCK (_proc); cur_cpuload = (guint) gst_util_uint64_scale (dtproc / num_cpus, G_GINT64_CONSTANT (1000), dts); gst_tracer_record_log (tr_proc, (guint64) getpid (), ts, MIN (avg_cpuload, 1000), MIN (cur_cpuload, 1000), tproc); /* *INDENT-ON* */ }