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gldownload: Micro-optimisation. Don't check output caps on every buffer

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The output caps will only change on a set_caps() call, so check if
they contain the SystemMemory feature then and save some
per-buffer CPU.
This commit is contained in:
Jan Schmidt 2017-08-21 06:49:02 -07:00
parent 6714809529
commit f02993921c
2 changed files with 16 additions and 17 deletions
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31
ext/gl/gstgldownloadelement.c
View file

@ -94,11 +94,18 @@ static gboolean
gst_gl_download_element_set_caps (GstBaseTransform * bt, GstCaps * in_caps,
GstCaps * out_caps)
{
GstGLDownloadElement *dl = GST_GL_DOWNLOAD_ELEMENT (bt);
GstVideoInfo out_info;
GstCapsFeatures *features = NULL;
if (!gst_video_info_from_caps (&out_info, out_caps))
return FALSE;
features = gst_caps_get_features (out_caps, 0);
dl->do_pbo_transfers = (!features || gst_caps_features_contains (features,
GST_CAPS_FEATURE_MEMORY_SYSTEM_MEMORY));
return TRUE;
}
@ -160,31 +167,21 @@ static GstFlowReturn
gst_gl_download_element_prepare_output_buffer (GstBaseTransform * bt,
GstBuffer * inbuf, GstBuffer ** outbuf)
{
GstCaps *src_caps = gst_pad_get_current_caps (bt->srcpad);
GstCapsFeatures *features = NULL;
GstGLDownloadElement *dl = GST_GL_DOWNLOAD_ELEMENT (bt);
gint i, n;
*outbuf = inbuf;
if (src_caps)
features = gst_caps_get_features (src_caps, 0);
if (dl->do_pbo_transfers) {
n = gst_buffer_n_memory (*outbuf);
for (i = 0; i < n; i++) {
GstMemory *mem = gst_buffer_peek_memory (*outbuf, i);
n = gst_buffer_n_memory (*outbuf);
for (i = 0; i < n; i++) {
GstMemory *mem = gst_buffer_peek_memory (*outbuf, i);
if (gst_is_gl_memory (mem)) {
if (!features || gst_caps_features_contains (features,
GST_CAPS_FEATURE_MEMORY_SYSTEM_MEMORY)) {
if (gst_is_gl_memory_pbo (mem))
gst_gl_memory_pbo_download_transfer ((GstGLMemoryPBO *) mem);
}
if (gst_is_gl_memory_pbo (mem))
gst_gl_memory_pbo_download_transfer ((GstGLMemoryPBO *) mem);
}
}
if (src_caps)
gst_caps_unref (src_caps);
return GST_FLOW_OK;
}

2
ext/gl/gstgldownloadelement.h
View file

@ -43,6 +43,8 @@ struct _GstGLDownloadElement
{
/* <private> */
GstGLBaseFilter parent;
gboolean do_pbo_transfers;
};
struct _GstGLDownloadElementClass