diff options
Diffstat (limited to 'common/recipes-multimedia/gstreamer/gst-plugins-good/0008-videocrop-kick-off-the-zero-copy-cropping.patch')
| -rw-r--r-- | common/recipes-multimedia/gstreamer/gst-plugins-good/0008-videocrop-kick-off-the-zero-copy-cropping.patch | 100 |
1 files changed, 100 insertions, 0 deletions
diff --git a/common/recipes-multimedia/gstreamer/gst-plugins-good/0008-videocrop-kick-off-the-zero-copy-cropping.patch b/common/recipes-multimedia/gstreamer/gst-plugins-good/0008-videocrop-kick-off-the-zero-copy-cropping.patch new file mode 100644 index 0000000..1e4734e --- /dev/null +++ b/common/recipes-multimedia/gstreamer/gst-plugins-good/0008-videocrop-kick-off-the-zero-copy-cropping.patch @@ -0,0 +1,100 @@ +From 78f532d7cc31fc7e2980998af97b1260c45ec5e5 Mon Sep 17 00:00:00 2001 +From: Kazunori Kobayashi <kkobayas@igel.co.jp> +Date: Thu, 10 May 2012 14:55:22 +0900 +Subject: [PATCH 08/31] videocrop: kick off the zero-copy cropping + +This patch enables zero-copy buffer cropping by creating a subbuffer +from an input buffer. + +Instead of creating a new buffer, the subbuffer is specified as an +offset into the input buffer along with an appropriate buffer size. + +The cropping functionality of gst_video_crop_transform() (which uses memory +copying) is bypassed when a subbuffer is defined. +--- + gst/videocrop/gstvideocrop.c | 48 ++++++++++++++++++++++++++++++++++++++++++ + 1 file changed, 48 insertions(+) + +diff --git a/gst/videocrop/gstvideocrop.c b/gst/videocrop/gstvideocrop.c +index ae7ddaf..cfd548e 100644 +--- a/gst/videocrop/gstvideocrop.c ++++ b/gst/videocrop/gstvideocrop.c +@@ -137,6 +137,8 @@ static gboolean gst_video_crop_set_caps (GstBaseTransform * trans, + static gboolean gst_video_crop_src_event (GstBaseTransform * trans, + GstEvent * event); + static gboolean gst_video_crop_start (GstBaseTransform * trans); ++static GstFlowReturn gst_video_crop_prepare_output_buffer (GstBaseTransform * ++ trans, GstBuffer * input, gint size, GstCaps * caps, GstBuffer ** buf); + + static void + gst_video_crop_base_init (gpointer g_class) +@@ -230,6 +232,8 @@ gst_video_crop_class_init (GstVideoCropClass * klass) + basetransform_class->get_unit_size = + GST_DEBUG_FUNCPTR (gst_video_crop_get_unit_size); + basetransform_class->start = GST_DEBUG_FUNCPTR (gst_video_crop_start); ++ basetransform_class->prepare_output_buffer = ++ GST_DEBUG_FUNCPTR (gst_video_crop_prepare_output_buffer); + + basetransform_class->passthrough_on_same_caps = FALSE; + basetransform_class->src_event = GST_DEBUG_FUNCPTR (gst_video_crop_src_event); +@@ -484,6 +488,13 @@ gst_video_crop_transform (GstBaseTransform * trans, GstBuffer * inbuf, + { + GstVideoCrop *vcrop = GST_VIDEO_CROP (trans); + ++ if (vcrop->stride_supported && ++ ((vcrop->in.packing == VIDEO_CROP_PIXEL_FORMAT_PACKED_SIMPLE) || ++ (vcrop->in.packing == VIDEO_CROP_PIXEL_FORMAT_PACKED_COMPLEX))) { ++ GST_LOG_OBJECT (vcrop, "passthrough because of zero-copy cropping"); ++ return GST_FLOW_OK; ++ } ++ + switch (vcrop->in.packing) { + case VIDEO_CROP_PIXEL_FORMAT_PACKED_SIMPLE: + gst_video_crop_transform_packed_simple (vcrop, inbuf, outbuf); +@@ -711,6 +722,43 @@ gst_video_crop_start (GstBaseTransform * trans) + return TRUE; + } + ++static GstFlowReturn ++gst_video_crop_prepare_output_buffer (GstBaseTransform * trans, ++ GstBuffer * input, gint size, GstCaps * caps, GstBuffer ** buf) ++{ ++ GstVideoCrop *vcrop = GST_VIDEO_CROP (trans); ++ guint sub_offset, sub_size; ++ ++ if (!vcrop->stride_supported) { ++ GST_LOG_OBJECT ++ (vcrop, ++ "creating subbuffer isn't needed because downstream plugins don't support rowstride"); ++ return GST_FLOW_OK; ++ } ++ ++ if (vcrop->in.packing == VIDEO_CROP_PIXEL_FORMAT_PACKED_SIMPLE) { ++ sub_offset = (vcrop->crop_top * vcrop->in.stride) + ++ (vcrop->crop_left * vcrop->in.bytes_per_pixel); ++ } else if (vcrop->in.packing == VIDEO_CROP_PIXEL_FORMAT_PACKED_COMPLEX) { ++ sub_offset = (vcrop->crop_top * vcrop->in.stride) + ++ (ROUND_DOWN_2 (vcrop->crop_left) * vcrop->in.bytes_per_pixel); ++ } else { ++ GST_LOG_OBJECT (vcrop, ++ "can't do zero-copy cropping except for packed format"); ++ return GST_FLOW_OK; ++ } ++ ++ sub_size = vcrop->out.height * vcrop->out.stride; ++ *buf = gst_buffer_create_sub (input, sub_offset, sub_size); ++ if (*buf == NULL) { ++ GST_ERROR_OBJECT (vcrop, "failed to create subbuffer"); ++ return GST_FLOW_ERROR; ++ } ++ gst_buffer_set_caps (*buf, caps); ++ ++ return GST_FLOW_OK; ++} ++ + static void + gst_video_crop_set_property (GObject * object, guint prop_id, + const GValue * value, GParamSpec * pspec) +-- +1.7.9.5 + |