diff options
Diffstat (limited to 'common/recipes-multimedia/gstreamer/gst-plugins-good/0018-videocrop-kick-off-NV12-zero-copy-cropping.patch')
| -rw-r--r-- | common/recipes-multimedia/gstreamer/gst-plugins-good/0018-videocrop-kick-off-NV12-zero-copy-cropping.patch | 105 |
1 files changed, 105 insertions, 0 deletions
diff --git a/common/recipes-multimedia/gstreamer/gst-plugins-good/0018-videocrop-kick-off-NV12-zero-copy-cropping.patch b/common/recipes-multimedia/gstreamer/gst-plugins-good/0018-videocrop-kick-off-NV12-zero-copy-cropping.patch new file mode 100644 index 0000000..4e391db --- /dev/null +++ b/common/recipes-multimedia/gstreamer/gst-plugins-good/0018-videocrop-kick-off-NV12-zero-copy-cropping.patch @@ -0,0 +1,105 @@ +From 795110fd2b53f1197e94c61078153b3433a1d296 Mon Sep 17 00:00:00 2001 +From: Kazunori Kobayashi <kkobayas@igel.co.jp> +Date: Thu, 4 Oct 2012 13:45:06 +0900 +Subject: [PATCH 18/31] videocrop: kick off NV12 zero-copy cropping + +This patch allows videocrop plugin to do zero-copy cropping by +adjusting the buffer offsets that are rowstride and chroma_byte_offset. +First of all, the function of cropping with memcpy is passed through +when the semi planar is set. Then, chroma_byte_offset is adjusted +to compensate for the extra offset due to creating the subbuffer, +which is caused by offsetting the buffer address based on Y plane. +--- + gst/videocrop/gstvideocrop.c | 37 ++++++++++++++++++++++++++++++++----- + 1 file changed, 32 insertions(+), 5 deletions(-) + +diff --git a/gst/videocrop/gstvideocrop.c b/gst/videocrop/gstvideocrop.c +index df02302..6b1da8a 100644 +--- a/gst/videocrop/gstvideocrop.c ++++ b/gst/videocrop/gstvideocrop.c +@@ -522,7 +522,8 @@ gst_video_crop_transform (GstBaseTransform * trans, GstBuffer * inbuf, + + if (vcrop->stride_supported && + ((vcrop->in.packing == VIDEO_CROP_PIXEL_FORMAT_PACKED_SIMPLE) || +- (vcrop->in.packing == VIDEO_CROP_PIXEL_FORMAT_PACKED_COMPLEX))) { ++ (vcrop->in.packing == VIDEO_CROP_PIXEL_FORMAT_PACKED_COMPLEX) || ++ (vcrop->in.packing == VIDEO_CROP_PIXEL_FORMAT_SEMI_PLANAR))) { + GST_LOG_OBJECT (vcrop, "passthrough because of zero-copy cropping"); + return GST_FLOW_OK; + } +@@ -634,6 +635,7 @@ gst_video_crop_transform_caps (GstBaseTransform * trans, + 0,}; + GstVideoCropImageDetails img_details = { 0, }; + guint rowstride; ++ gint chroma_byte_offset, delta_chroma_offs; + + structure = gst_caps_get_structure (caps, i); + +@@ -656,7 +658,7 @@ gst_video_crop_transform_caps (GstBaseTransform * trans, + gst_structure_set_value (new_structure, "width", &w_val); + gst_structure_set_value (new_structure, "height", &h_val); + +- /* set rowstride when creating output caps */ ++ /* set rowstride and adjust chroma_byte_offset when creating output caps */ + if (!GST_VALUE_HOLDS_INT_RANGE (&w_val) && + !GST_VALUE_HOLDS_INT_RANGE (&h_val)) { + if (!gst_video_crop_get_image_details_from_structure (vcrop, &img_details, +@@ -665,20 +667,42 @@ gst_video_crop_transform_caps (GstBaseTransform * trans, + goto add_structure; + } + } else { +- GST_LOG_OBJECT (vcrop, "go through setting rowstride"); ++ GST_LOG_OBJECT (vcrop, ++ "go through setting rowstride and adjusting chroma_byte_offset"); + goto add_structure; + } + + if (img_details.packing == VIDEO_CROP_PIXEL_FORMAT_PACKED_SIMPLE || +- img_details.packing == VIDEO_CROP_PIXEL_FORMAT_PACKED_COMPLEX) ++ img_details.packing == VIDEO_CROP_PIXEL_FORMAT_PACKED_COMPLEX) { + rowstride = img_details.stride; +- else ++ delta_chroma_offs = 0; ++ } else if (img_details.packing == VIDEO_CROP_PIXEL_FORMAT_SEMI_PLANAR) { ++ guint ratio_y_c; ++ ++ rowstride = img_details.stride; ++ /* Y plane / UV plane */ ++ ratio_y_c = img_details.uv_off / (img_details.size - img_details.uv_off); ++ delta_chroma_offs = rowstride * vcrop->crop_top / ratio_y_c; ++ } else { + rowstride = 0; ++ delta_chroma_offs = 0; ++ } + + if (vcrop->stride_supported && (direction == GST_PAD_SINK) && rowstride) + gst_structure_set (new_structure, "rowstride", G_TYPE_INT, + (gint) rowstride, NULL); + ++ if (vcrop->stride_supported && ++ gst_structure_get_int (structure, "chroma_byte_offset", ++ &chroma_byte_offset) && delta_chroma_offs) { ++ /* Adjust chroma_byte_offset because it would exceed the proper value ++ by delta_chroma_offs. It is due to offsetting the buffer address that ++ indicates Y plane with subbuffer for zero-copy cropping. */ ++ chroma_byte_offset -= delta_chroma_offs; ++ gst_structure_set (new_structure, "chroma_byte_offset", G_TYPE_INT, ++ chroma_byte_offset, NULL); ++ } ++ + add_structure: + g_value_unset (&w_val); + g_value_unset (&h_val); +@@ -797,6 +821,9 @@ gst_video_crop_prepare_output_buffer (GstBaseTransform * trans, + } 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 if (vcrop->in.packing == VIDEO_CROP_PIXEL_FORMAT_SEMI_PLANAR) { ++ sub_offset = (vcrop->crop_top * vcrop->in.stride) + ++ ROUND_DOWN_2 (vcrop->crop_left); + } else { + GST_LOG_OBJECT (vcrop, + "can't do zero-copy cropping except for packed format"); +-- +1.7.9.5 + |