static GstStateChangeReturn gst_monoscope_change_state (GstElement * element, GstStateChange transition) { GstMonoscope *monoscope = GST_MONOSCOPE (element); GstStateChangeReturn ret; switch (transition) { case GST_STATE_CHANGE_NULL_TO_READY: break; case GST_STATE_CHANGE_READY_TO_PAUSED: gst_monoscope_reset (monoscope); break; default: break; } ret = GST_ELEMENT_CLASS (parent_class)->change_state (element, transition); switch (transition) { case GST_STATE_CHANGE_PAUSED_TO_READY: break; case GST_STATE_CHANGE_READY_TO_NULL: break; default: break; } return ret; }
static GstStateChangeReturn gst_monoscope_change_state (GstElement * element, GstStateChange transition) { GstMonoscope *monoscope = GST_MONOSCOPE (element); GstStateChangeReturn ret; switch (transition) { case GST_STATE_CHANGE_NULL_TO_READY: break; case GST_STATE_CHANGE_READY_TO_PAUSED: gst_monoscope_reset (monoscope); break; default: break; } ret = GST_ELEMENT_CLASS (parent_class)->change_state (element, transition); switch (transition) { case GST_STATE_CHANGE_PAUSED_TO_READY: if (monoscope->pool) { gst_buffer_pool_set_active (monoscope->pool, FALSE); gst_object_replace ((GstObject **) & monoscope->pool, NULL); } break; case GST_STATE_CHANGE_READY_TO_NULL: break; default: break; } return ret; }
static gboolean gst_monoscope_src_setcaps (GstPad * pad, GstCaps * caps) { GstMonoscope *monoscope = GST_MONOSCOPE (GST_PAD_PARENT (pad)); GstStructure *structure; structure = gst_caps_get_structure (caps, 0); gst_structure_get_int (structure, "width", &monoscope->width); gst_structure_get_int (structure, "height", &monoscope->height); gst_structure_get_fraction (structure, "framerate", &monoscope->fps_num, &monoscope->fps_denom); monoscope->outsize = monoscope->width * monoscope->height * 4; monoscope->frame_duration = gst_util_uint64_scale_int (GST_SECOND, monoscope->fps_denom, monoscope->fps_num); monoscope->spf = gst_util_uint64_scale_int (monoscope->rate, monoscope->fps_denom, monoscope->fps_num); GST_DEBUG_OBJECT (monoscope, "dimension %dx%d, framerate %d/%d, spf %d", monoscope->width, monoscope->height, monoscope->fps_num, monoscope->fps_denom, monoscope->spf); if (monoscope->visstate) { monoscope_close (monoscope->visstate); monoscope->visstate = NULL; } monoscope->visstate = monoscope_init (monoscope->width, monoscope->height); return (monoscope->visstate != NULL); }
static void gst_monoscope_finalize (GObject * object) { GstMonoscope *monoscope = GST_MONOSCOPE (object); if (monoscope->visstate) monoscope_close (monoscope->visstate); g_object_unref (monoscope->adapter); G_OBJECT_CLASS (parent_class)->finalize (object); }
static gboolean gst_monoscope_sink_setcaps (GstPad * pad, GstCaps * caps) { GstMonoscope *monoscope = GST_MONOSCOPE (GST_PAD_PARENT (pad)); GstStructure *structure; structure = gst_caps_get_structure (caps, 0); gst_structure_get_int (structure, "rate", &monoscope->rate); GST_DEBUG_OBJECT (monoscope, "sample rate = %d", monoscope->rate); return TRUE; }
static gboolean gst_monoscope_sink_event (GstPad * pad, GstEvent * event) { GstMonoscope *monoscope; gboolean res; monoscope = GST_MONOSCOPE (gst_pad_get_parent (pad)); switch (GST_EVENT_TYPE (event)) { case GST_EVENT_FLUSH_START: res = gst_pad_push_event (monoscope->srcpad, event); break; case GST_EVENT_FLUSH_STOP: gst_monoscope_reset (monoscope); res = gst_pad_push_event (monoscope->srcpad, event); break; case GST_EVENT_NEWSEGMENT: { GstFormat format; gdouble rate, arate; gint64 start, stop, time; gboolean update; /* the newsegment values are used to clip the input samples * and to convert the incomming timestamps to running time so * we can do QoS */ gst_event_parse_new_segment_full (event, &update, &rate, &arate, &format, &start, &stop, &time); /* now configure the values */ gst_segment_set_newsegment_full (&monoscope->segment, update, rate, arate, format, start, stop, time); res = gst_pad_push_event (monoscope->srcpad, event); break; } default: res = gst_pad_push_event (monoscope->srcpad, event); break; } gst_object_unref (monoscope); return res; }
static gboolean gst_monoscope_sink_event (GstPad * pad, GstObject * parent, GstEvent * event) { GstMonoscope *monoscope; gboolean res; monoscope = GST_MONOSCOPE (parent); switch (GST_EVENT_TYPE (event)) { case GST_EVENT_FLUSH_START: res = gst_pad_push_event (monoscope->srcpad, event); break; case GST_EVENT_FLUSH_STOP: gst_monoscope_reset (monoscope); res = gst_pad_push_event (monoscope->srcpad, event); break; case GST_EVENT_SEGMENT: { /* the newsegment values are used to clip the input samples * and to convert the incomming timestamps to running time so * we can do QoS */ gst_event_copy_segment (event, &monoscope->segment); res = gst_pad_push_event (monoscope->srcpad, event); break; } case GST_EVENT_CAPS: { GstCaps *caps; gst_event_parse_caps (event, &caps); gst_monoscope_sink_setcaps (monoscope, caps); gst_event_unref (event); res = TRUE; break; } default: res = gst_pad_push_event (monoscope->srcpad, event); break; } return res; }
static gboolean gst_monoscope_src_event (GstPad * pad, GstEvent * event) { GstMonoscope *monoscope; gboolean res; monoscope = GST_MONOSCOPE (gst_pad_get_parent (pad)); switch (GST_EVENT_TYPE (event)) { case GST_EVENT_QOS:{ gdouble proportion; GstClockTimeDiff diff; GstClockTime timestamp; gst_event_parse_qos (event, &proportion, &diff, ×tamp); /* save stuff for the _chain() function */ GST_OBJECT_LOCK (monoscope); monoscope->proportion = proportion; if (diff >= 0) /* we're late, this is a good estimate for next displayable * frame (see part-qos.txt) */ monoscope->earliest_time = timestamp + 2 * diff + monoscope->frame_duration; else monoscope->earliest_time = timestamp + diff; GST_OBJECT_UNLOCK (monoscope); res = gst_pad_push_event (monoscope->sinkpad, event); break; } default: res = gst_pad_push_event (monoscope->sinkpad, event); break; } gst_object_unref (monoscope); return res; }
static GstFlowReturn gst_monoscope_chain (GstPad * pad, GstObject * parent, GstBuffer * inbuf) { GstFlowReturn flow_ret = GST_FLOW_OK; GstMonoscope *monoscope; monoscope = GST_MONOSCOPE (parent); if (monoscope->rate == 0) { gst_buffer_unref (inbuf); flow_ret = GST_FLOW_NOT_NEGOTIATED; goto out; } /* Make sure have an output format */ flow_ret = ensure_negotiated (monoscope); if (flow_ret != GST_FLOW_OK) { gst_buffer_unref (inbuf); goto out; } /* don't try to combine samples from discont buffer */ if (GST_BUFFER_FLAG_IS_SET (inbuf, GST_BUFFER_FLAG_DISCONT)) { gst_adapter_clear (monoscope->adapter); monoscope->next_ts = GST_CLOCK_TIME_NONE; } /* Match timestamps from the incoming audio */ if (GST_BUFFER_TIMESTAMP (inbuf) != GST_CLOCK_TIME_NONE) monoscope->next_ts = GST_BUFFER_TIMESTAMP (inbuf); GST_LOG_OBJECT (monoscope, "in buffer has %d samples, ts=%" GST_TIME_FORMAT, gst_buffer_get_size (inbuf) / monoscope->bps, GST_TIME_ARGS (GST_BUFFER_TIMESTAMP (inbuf))); gst_adapter_push (monoscope->adapter, inbuf); inbuf = NULL; /* Collect samples until we have enough for an output frame */ while (flow_ret == GST_FLOW_OK) { gint16 *samples; GstBuffer *outbuf = NULL; guint32 *pixels, avail, bytesperframe; avail = gst_adapter_available (monoscope->adapter); GST_LOG_OBJECT (monoscope, "bytes avail now %u", avail); bytesperframe = monoscope->spf * monoscope->bps; if (avail < bytesperframe) break; /* FIXME: something is wrong with QoS, we are skipping way too much * stuff even with very low CPU loads */ #if 0 if (monoscope->next_ts != -1) { gboolean need_skip; gint64 qostime; qostime = gst_segment_to_running_time (&monoscope->segment, GST_FORMAT_TIME, monoscope->next_ts); GST_OBJECT_LOCK (monoscope); /* check for QoS, don't compute buffers that are known to be late */ need_skip = GST_CLOCK_TIME_IS_VALID (monoscope->earliest_time) && qostime <= monoscope->earliest_time; GST_OBJECT_UNLOCK (monoscope); if (need_skip) { GST_WARNING_OBJECT (monoscope, "QoS: skip ts: %" GST_TIME_FORMAT ", earliest: %" GST_TIME_FORMAT, GST_TIME_ARGS (qostime), GST_TIME_ARGS (monoscope->earliest_time)); goto skip; } } #endif samples = (gint16 *) gst_adapter_map (monoscope->adapter, bytesperframe); if (monoscope->spf < 512) { gint16 in_data[512], i; for (i = 0; i < 512; ++i) { gdouble off; off = ((gdouble) i * (gdouble) monoscope->spf) / 512.0; in_data[i] = samples[MIN ((guint) off, monoscope->spf)]; } pixels = monoscope_update (monoscope->visstate, in_data); } else { /* not really correct, but looks much prettier */ pixels = monoscope_update (monoscope->visstate, samples); } GST_LOG_OBJECT (monoscope, "allocating output buffer"); flow_ret = gst_buffer_pool_acquire_buffer (monoscope->pool, &outbuf, NULL); if (flow_ret != GST_FLOW_OK) { gst_adapter_unmap (monoscope->adapter); goto out; } gst_buffer_fill (outbuf, 0, pixels, monoscope->outsize); GST_BUFFER_TIMESTAMP (outbuf) = monoscope->next_ts; GST_BUFFER_DURATION (outbuf) = monoscope->frame_duration; flow_ret = gst_pad_push (monoscope->srcpad, outbuf); #if 0 skip: #endif if (GST_CLOCK_TIME_IS_VALID (monoscope->next_ts)) monoscope->next_ts += monoscope->frame_duration; gst_adapter_flush (monoscope->adapter, bytesperframe); } out: return flow_ret; }