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appsrc: add min-percent property
Emit need-data when the amount of data in the internal queue drops below min-percent. Fixes #608309
This commit is contained in:
Wim Taymans
Wim Taymans
parent
fac9346405
commit
c94356ad9b
1 changed files with 86 additions and 32 deletions
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@ -140,6 +140,7 @@ struct _GstAppSrcPrivate
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guint64 min_latency;
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guint64 max_latency;
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gboolean emit_signals;
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guint min_percent;
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GstAppSrcCallbacks callbacks;
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gpointer user_data;
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@ -172,6 +173,7 @@ enum
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#define DEFAULT_PROP_MIN_LATENCY -1
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#define DEFAULT_PROP_MAX_LATENCY -1
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#define DEFAULT_PROP_EMIT_SIGNALS TRUE
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#define DEFAULT_PROP_MIN_PERCENT 0
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enum
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{
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@ -186,6 +188,7 @@ enum
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PROP_MIN_LATENCY,
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PROP_MAX_LATENCY,
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PROP_EMIT_SIGNALS,
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PROP_MIN_PERCENT,
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PROP_LAST
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};
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@ -400,6 +403,20 @@ gst_app_src_class_init (GstAppSrcClass * klass)
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"Emit new-preroll and new-buffer signals", DEFAULT_PROP_EMIT_SIGNALS,
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G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
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/**
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* GstAppSrc::empty-percent
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*
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* Make appsrc emit the "need-data" signal when the amount of bytes in the
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* queue drops below this percentage of max-bytes.
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*
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* Since: 0.10.26
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*/
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g_object_class_install_property (gobject_class, PROP_MIN_PERCENT,
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g_param_spec_uint ("min-percent", "Min Percent",
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"Emit need-data when queued bytes drops below this percent of max-bytes",
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0, 100, DEFAULT_PROP_MIN_PERCENT,
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G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
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/**
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* GstAppSrc::need-data:
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* @appsrc: the appsrc element that emited the signal
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@ -517,6 +534,7 @@ gst_app_src_init (GstAppSrc * appsrc, GstAppSrcClass * klass)
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priv->min_latency = DEFAULT_PROP_MIN_LATENCY;
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priv->max_latency = DEFAULT_PROP_MAX_LATENCY;
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priv->emit_signals = DEFAULT_PROP_EMIT_SIGNALS;
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priv->min_percent = DEFAULT_PROP_MIN_PERCENT;
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gst_base_src_set_live (GST_BASE_SRC (appsrc), DEFAULT_PROP_IS_LIVE);
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}
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@ -601,6 +619,9 @@ gst_app_src_set_property (GObject * object, guint prop_id,
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case PROP_EMIT_SIGNALS:
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gst_app_src_set_emit_signals (appsrc, g_value_get_boolean (value));
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break;
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case PROP_MIN_PERCENT:
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priv->min_percent = g_value_get_uint (value);
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break;
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default:
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G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
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break;
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@ -663,6 +684,9 @@ gst_app_src_get_property (GObject * object, guint prop_id, GValue * value,
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case PROP_EMIT_SIGNALS:
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g_value_set_boolean (value, gst_app_src_get_emit_signals (appsrc));
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break;
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case PROP_MIN_PERCENT:
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g_value_set_uint (value, priv->min_percent);
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break;
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default:
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G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
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break;
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@ -860,6 +884,54 @@ gst_app_src_do_seek (GstBaseSrc * src, GstSegment * segment)
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return res;
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}
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/* must be called with the appsrc mutex */
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static gboolean
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gst_app_src_emit_seek (GstAppSrc * appsrc, guint64 offset)
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{
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gboolean res;
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gboolean emit;
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GstAppSrcPrivate *priv = appsrc->priv;
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emit = priv->emit_signals;
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g_mutex_unlock (priv->mutex);
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GST_DEBUG_OBJECT (appsrc,
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"we are at %" G_GINT64_FORMAT ", seek to %" G_GINT64_FORMAT,
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priv->offset, offset);
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if (priv->callbacks.seek_data)
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res = priv->callbacks.seek_data (appsrc, offset, priv->user_data);
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else if (emit)
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g_signal_emit (appsrc, gst_app_src_signals[SIGNAL_SEEK_DATA], 0,
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offset, &res);
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g_mutex_lock (priv->mutex);
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return res;
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}
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/* must be called with the appsrc mutex. After this call things can be
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* flushing */
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static void
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gst_app_src_emit_need_data (GstAppSrc * appsrc, guint size)
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{
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gboolean emit;
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GstAppSrcPrivate *priv = appsrc->priv;
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emit = priv->emit_signals;
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g_mutex_unlock (priv->mutex);
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/* we have no data, we need some. We fire the signal with the size hint. */
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if (priv->callbacks.need_data)
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priv->callbacks.need_data (appsrc, size, priv->user_data);
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else if (emit)
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g_signal_emit (appsrc, gst_app_src_signals[SIGNAL_NEED_DATA], 0, size,
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NULL);
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g_mutex_lock (priv->mutex);
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/* we can be flushing now because we released the lock */
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}
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static GstFlowReturn
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gst_app_src_create (GstBaseSrc * bsrc, guint64 offset, guint size,
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GstBuffer ** buf)
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@ -878,27 +950,14 @@ gst_app_src_create (GstBaseSrc * bsrc, guint64 offset, guint size,
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* changed. */
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if (G_UNLIKELY (priv->offset != offset)) {
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gboolean res;
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gboolean emit;
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emit = priv->emit_signals;
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g_mutex_unlock (priv->mutex);
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GST_DEBUG_OBJECT (appsrc,
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"we are at %" G_GINT64_FORMAT ", seek to %" G_GINT64_FORMAT,
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priv->offset, offset);
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if (priv->callbacks.seek_data)
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res = priv->callbacks.seek_data (appsrc, offset, priv->user_data);
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else if (emit)
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g_signal_emit (appsrc, gst_app_src_signals[SIGNAL_SEEK_DATA], 0,
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offset, &res);
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/* do the seek */
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res = gst_app_src_emit_seek (appsrc, offset);
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if (G_UNLIKELY (!res))
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/* failing to seek is fatal */
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goto seek_error;
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g_mutex_lock (priv->mutex);
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priv->offset = offset;
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}
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}
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@ -916,32 +975,26 @@ gst_app_src_create (GstBaseSrc * bsrc, guint64 offset, guint size,
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priv->queued_bytes -= buf_size;
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/* only update the offset when in random_access mode */
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if (priv->stream_type == GST_APP_STREAM_TYPE_RANDOM_ACCESS) {
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if (priv->stream_type == GST_APP_STREAM_TYPE_RANDOM_ACCESS)
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priv->offset += buf_size;
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}
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gst_buffer_set_caps (*buf, priv->caps);
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/* signal that we removed an item */
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g_cond_broadcast (priv->cond);
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/* see if we go lower than the empty-percent */
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if (priv->min_percent && priv->max_bytes) {
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if (priv->queued_bytes * 100 / priv->max_bytes <= priv->min_percent)
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/* ignore flushing state, we got a buffer and we will return it now.
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* Errors will be handled in the next round */
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gst_app_src_emit_need_data (appsrc, size);
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}
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ret = GST_FLOW_OK;
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break;
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} else {
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gboolean emit;
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gst_app_src_emit_need_data (appsrc, size);
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emit = priv->emit_signals;
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g_mutex_unlock (priv->mutex);
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/* we have no data, we need some. We fire the signal with the size hint. */
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if (priv->callbacks.need_data)
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priv->callbacks.need_data (appsrc, size, priv->user_data);
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else if (emit)
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g_signal_emit (appsrc, gst_app_src_signals[SIGNAL_NEED_DATA], 0, size,
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NULL);
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g_mutex_lock (priv->mutex);
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/* we can be flushing now because we released the lock */
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/* we can be flushing now because we released the lock above */
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if (G_UNLIKELY (priv->flushing))
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goto flushing;
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@ -982,6 +1035,7 @@ eos:
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}
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seek_error:
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{
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g_mutex_unlock (priv->mutex);
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GST_ELEMENT_ERROR (appsrc, RESOURCE, READ, ("failed to seek"),
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GST_ERROR_SYSTEM);
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return GST_FLOW_ERROR;
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@ -1238,8 +1292,8 @@ static void
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gst_app_src_set_latencies (GstAppSrc * appsrc, gboolean do_min, guint64 min,
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gboolean do_max, guint64 max)
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{
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gboolean changed = FALSE;
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GstAppSrcPrivate *priv = appsrc->priv;
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gboolean changed = FALSE;
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g_mutex_lock (priv->mutex);
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if (do_min && priv->min_latency != min) {
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