static gboolean gst_app_src_query (GstBaseSrc * src, GstQuery * query) { GstAppSrc *appsrc = GST_APP_SRC_CAST (src); GstAppSrcPrivate *priv = appsrc->priv; gboolean res; switch (GST_QUERY_TYPE (query)) { case GST_QUERY_LATENCY: { GstClockTime min, max; gboolean live; /* Query the parent class for the defaults */ res = gst_base_src_query_latency (src, &live, &min, &max); /* overwrite with our values when we need to */ g_mutex_lock (&priv->mutex); if (priv->min_latency != -1) min = priv->min_latency; if (priv->max_latency != -1) max = priv->max_latency; g_mutex_unlock (&priv->mutex); gst_query_set_latency (query, live, min, max); break; } case GST_QUERY_SCHEDULING: { gst_query_set_scheduling (query, GST_SCHEDULING_FLAG_SEEKABLE, 1, -1, 0); gst_query_add_scheduling_mode (query, GST_PAD_MODE_PUSH); switch (priv->stream_type) { case GST_APP_STREAM_TYPE_STREAM: case GST_APP_STREAM_TYPE_SEEKABLE: break; case GST_APP_STREAM_TYPE_RANDOM_ACCESS: gst_query_add_scheduling_mode (query, GST_PAD_MODE_PULL); break; } res = TRUE; break; } default: res = GST_BASE_SRC_CLASS (parent_class)->query (src, query); break; } return res; }
static gboolean gst_gio_src_query (GstBaseSrc * base_src, GstQuery * query) { gboolean res; GstGioSrc *src = GST_GIO_SRC (base_src); switch (GST_QUERY_TYPE (query)) { case GST_QUERY_SCHEDULING: { gchar *scheme; GstSchedulingFlags flags; flags = 0; if (src->file == NULL) goto forward_parent; scheme = g_file_get_uri_scheme (src->file); if (scheme == NULL) goto forward_parent; if (strcmp (scheme, "file") == 0) { GST_LOG_OBJECT (src, "local URI, assuming random access is possible"); flags |= GST_SCHEDULING_FLAG_SEEKABLE; } else if (strcmp (scheme, "http") == 0 || strcmp (scheme, "https") == 0) { GST_LOG_OBJECT (src, "blacklisted protocol '%s', " "no random access possible", scheme); } else { GST_LOG_OBJECT (src, "unhandled protocol '%s', asking parent", scheme); goto forward_parent; } g_free (scheme); gst_query_set_scheduling (query, flags, 1, -1, 0); gst_query_add_scheduling_mode (query, GST_PAD_MODE_PUSH); if (flags & GST_SCHEDULING_FLAG_SEEKABLE) gst_query_add_scheduling_mode (query, GST_PAD_MODE_PULL); res = TRUE; break; } default: forward_parent: res = GST_CALL_PARENT_WITH_DEFAULT (GST_BASE_SRC_CLASS, query, (base_src, query), FALSE); break; } return res; }
static gboolean gst_ladspa_source_type_query (GstBaseSrc * base, GstQuery * query) { GstLADSPASource *ladspa = GST_LADSPA_SOURCE (base); gboolean res = FALSE; switch (GST_QUERY_TYPE (query)) { case GST_QUERY_CONVERT: { GstFormat src_fmt, dest_fmt; gint64 src_val, dest_val; gst_query_parse_convert (query, &src_fmt, &src_val, &dest_fmt, &dest_val); if (!gst_audio_info_convert (&ladspa->info, src_fmt, src_val, dest_fmt, &dest_val)) { GST_DEBUG_OBJECT (ladspa, "query failed"); return FALSE; } gst_query_set_convert (query, src_fmt, src_val, dest_fmt, dest_val); res = TRUE; break; } case GST_QUERY_SCHEDULING: { /* if we can operate in pull mode */ gst_query_set_scheduling (query, GST_SCHEDULING_FLAG_SEEKABLE, 1, -1, 0); gst_query_add_scheduling_mode (query, GST_PAD_MODE_PUSH); if (ladspa->can_activate_pull) gst_query_add_scheduling_mode (query, GST_PAD_MODE_PULL); res = TRUE; break; } default: res = GST_BASE_SRC_CLASS (gst_ladspa_source_type_parent_class)->query (base, query); break; } return res; }
static gboolean gst_rtmp_src_query (GstBaseSrc * basesrc, GstQuery * query) { gboolean ret = FALSE; GstRTMPSrc *src = GST_RTMP_SRC (basesrc); switch (GST_QUERY_TYPE (query)) { case GST_QUERY_URI: gst_query_set_uri (query, src->uri); ret = TRUE; break; case GST_QUERY_POSITION:{ GstFormat format; gst_query_parse_position (query, &format, NULL); if (format == GST_FORMAT_TIME) { gst_query_set_position (query, format, src->last_timestamp); ret = TRUE; } break; } case GST_QUERY_DURATION:{ GstFormat format; gdouble duration; gst_query_parse_duration (query, &format, NULL); if (format == GST_FORMAT_TIME && src->rtmp) { duration = RTMP_GetDuration (src->rtmp); if (duration != 0.0) { gst_query_set_duration (query, format, duration * GST_SECOND); ret = TRUE; } } break; } case GST_QUERY_SCHEDULING:{ gst_query_set_scheduling (query, GST_SCHEDULING_FLAG_SEQUENTIAL | GST_SCHEDULING_FLAG_BANDWIDTH_LIMITED, 1, -1, 0); gst_query_add_scheduling_mode (query, GST_PAD_MODE_PUSH); ret = TRUE; break; } default: ret = FALSE; break; } if (!ret) ret = GST_BASE_SRC_CLASS (parent_class)->query (basesrc, query); return ret; }
static gboolean gst_push_file_src_ghostpad_query (GstPad * pad, GstObject * parent, GstQuery * query) { gboolean res; switch (GST_QUERY_TYPE (query)) { case GST_QUERY_SCHEDULING: gst_query_set_scheduling (query, GST_SCHEDULING_FLAG_SEEKABLE, 1, -1, 0); gst_query_add_scheduling_mode (query, GST_PAD_MODE_PUSH); res = TRUE; break; default: res = gst_proxy_pad_query_default (pad, parent, query); break; } return res; }
static gboolean gst_audio_test_src_query (GstBaseSrc * basesrc, GstQuery * query) { GstAudioTestSrc *src = GST_AUDIO_TEST_SRC (basesrc); gboolean res = FALSE; switch (GST_QUERY_TYPE (query)) { case GST_QUERY_CONVERT: { GstFormat src_fmt, dest_fmt; gint64 src_val, dest_val; gst_query_parse_convert (query, &src_fmt, &src_val, &dest_fmt, &dest_val); if (!gst_audio_info_convert (&src->info, src_fmt, src_val, dest_fmt, &dest_val)) goto error; gst_query_set_convert (query, src_fmt, src_val, dest_fmt, dest_val); res = TRUE; break; } case GST_QUERY_SCHEDULING: { /* if we can operate in pull mode */ gst_query_set_scheduling (query, GST_SCHEDULING_FLAG_SEEKABLE, 1, -1, 0); gst_query_add_scheduling_mode (query, GST_PAD_MODE_PUSH); if (src->can_activate_pull) gst_query_add_scheduling_mode (query, GST_PAD_MODE_PULL); res = TRUE; break; } case GST_QUERY_LATENCY: { if (src->info.rate > 0) { GstClockTime latency; latency = gst_util_uint64_scale (src->generate_samples_per_buffer, GST_SECOND, src->info.rate); gst_query_set_latency (query, gst_base_src_is_live (GST_BASE_SRC_CAST (src)), latency, GST_CLOCK_TIME_NONE); GST_DEBUG_OBJECT (src, "Reporting latency of %" GST_TIME_FORMAT, GST_TIME_ARGS (latency)); res = TRUE; } break; } default: res = GST_BASE_SRC_CLASS (parent_class)->query (basesrc, query); break; } return res; /* ERROR */ error: { GST_DEBUG_OBJECT (src, "query failed"); return FALSE; } }