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videoencoder: Add API to conveniently handle tags

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This commit is contained in:
Sebastian Dröge 2012-08-09 16:02:15 +02:00
parent 7f0e65bb46
commit 3c915afc39
2 changed files with 53 additions and 0 deletions
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48
gst-libs/gst/video/gstvideoencoder.c
View file

@ -166,6 +166,9 @@ struct _GstVideoEncoderPrivate
GstAllocator *allocator;
GstAllocationParams params;
GstTagList *tags;
gboolean tags_changed;
};
typedef struct _ForcedKeyUnitEvent ForcedKeyUnitEvent;
@ -341,6 +344,11 @@ gst_video_encoder_reset (GstVideoEncoder * encoder)
gst_video_codec_state_unref (priv->output_state);
priv->output_state = NULL;
if (priv->tags)
gst_tag_list_unref (priv->tags);
priv->tags = NULL;
priv->tags_changed = FALSE;
GST_VIDEO_ENCODER_STREAM_UNLOCK (encoder);
}
@ -1634,6 +1642,12 @@ gst_video_encoder_finish_frame (GstVideoEncoder * encoder,
break;
}
if (priv->tags && priv->tags_changed) {
gst_video_encoder_push_event (encoder,
gst_event_new_tag (gst_tag_list_ref (priv->tags)));
priv->tags_changed = FALSE;
}
/* no buffer data means this frame is skipped/dropped */
if (!frame->output_buffer) {
GST_DEBUG_OBJECT (encoder, "skipping frame %" GST_TIME_FORMAT,
@ -1962,3 +1976,37 @@ gst_video_encoder_get_frame (GstVideoEncoder * encoder, int frame_number)
return frame;
}
/**
* gst_video_encoder_merge_tags:
* @encoder: a #GstVideoEncoder
* @tags: a #GstTagList to merge
* @mode: the #GstTagMergeMode to use
*
* Adds tags to so-called pending tags, which will be processed
* before pushing out data downstream.
*
* Note that this is provided for convenience, and the subclass is
* not required to use this and can still do tag handling on its own.
*
* MT safe.
*/
void
gst_video_encoder_merge_tags (GstVideoEncoder * encoder,
const GstTagList * tags, GstTagMergeMode mode)
{
GstTagList *otags;
g_return_if_fail (GST_IS_VIDEO_ENCODER (encoder));
g_return_if_fail (tags == NULL || GST_IS_TAG_LIST (tags));
GST_VIDEO_ENCODER_STREAM_LOCK (encoder);
if (tags)
GST_DEBUG_OBJECT (encoder, "merging tags %" GST_PTR_FORMAT, tags);
otags = encoder->priv->tags;
encoder->priv->tags = gst_tag_list_merge (encoder->priv->tags, tags, mode);
if (otags)
gst_tag_list_unref (otags);
encoder->priv->tags_changed = TRUE;
GST_VIDEO_ENCODER_STREAM_UNLOCK (encoder);
}

5
gst-libs/gst/video/gstvideoencoder.h
View file

@ -293,6 +293,11 @@ void gst_video_encoder_get_latency (GstVideoEncoder *encoder,
void gst_video_encoder_set_headers (GstVideoEncoder *encoder,
GList *headers);
void gst_video_encoder_merge_tags (GstVideoEncoder *encoder,
const GstTagList *tags,
GstTagMergeMode mode);
G_END_DECLS
#endif