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video-format: use shifts when possible

Browse source 
https://bugzilla.gnome.org/show_bug.cgi?id=707361
This commit is contained in:
Wim Taymans 2013-12-25 14:57:30 +01:00 committed by Nicolas Dufresne
parent 980811c120
commit 33c486e5c1
1 changed files with 29 additions and 26 deletions

55
gst-libs/gst/video/video-format.c
View file

@ -2084,7 +2084,7 @@ pack_I422_10BE (const GstVideoFormatInfo * info, GstVideoPackFlags flags,
}
static void
get_tile_NV12 (gint tile_width, gint tile_height, gint tile_size, gint tx,
get_tile_NV12 (gint tile_width, gint ts, gint tx,
gint ty, gint x_tiles, gint y_tiles,
const gpointer data[GST_VIDEO_MAX_PLANES],
const gint stride[GST_VIDEO_MAX_PLANES],
@ -2096,19 +2096,18 @@ get_tile_NV12 (gint tile_width, gint tile_height, gint tile_size, gint tx,
/* index of Y tile */
offset = gst_video_tile_get_index (GST_VIDEO_TILE_MODE_ZFLIPZ_2X2,
tx, ty, x_tiles, y_tiles);
offset *= tile_size;
offset <<= ts;
tile_data[0] = ((guint8 *) data[0]) + offset;
tile_stride[0] = tile_width;
/* index of UV tile */
offset = gst_video_tile_get_index (GST_VIDEO_TILE_MODE_ZFLIPZ_2X2,
tx, ty >> 1, x_tiles, (y_tiles + 1) >> 1);
offset *= tile_size;
offset <<= ts;
/* On odd rows we return the second part of the UV tile */
if (ty & 1)
offset += tile_width * (tile_height >> 1);
offset |= (ty & 1) << (ts - 1);
tile_data[1] = ((guint8 *) data[1]) + offset;
tile_stride[1] = tile_width;
tile_stride[0] = tile_stride[1] = tile_width;
}
#define PACK_NV12T GST_VIDEO_FORMAT_AYUV, unpack_NV12T, 1, pack_NV12T
@ -2120,15 +2119,17 @@ unpack_NV12T (const GstVideoFormatInfo * info, GstVideoPackFlags flags,
const GstVideoFormatInfo *unpack_info, *finfo;
guint8 *line = dest;
gint x_tiles, y_tiles;
gint tile_width, tile_height, tile_size;
gint ws, hs, ts, tile_width;
gint ntx, tx, ty;
gint unpack_pstride;
tile_width = 1 << info->w_sub[3];
tile_height = 1 << info->h_sub[3];
tile_size = tile_width * tile_height;
ws = info->w_sub[GST_VIDEO_COMP_TILEINFO];
hs = info->h_sub[GST_VIDEO_COMP_TILEINFO];
ts = ws + hs;
x_tiles = stride[0] / 64;
tile_width = 1 << ws;
x_tiles = stride[0] >> ws;
y_tiles = stride[2];
/* we reuse these unpack functions */
@ -2139,14 +2140,14 @@ unpack_NV12T (const GstVideoFormatInfo * info, GstVideoPackFlags flags,
unpack_pstride = GST_VIDEO_FORMAT_INFO_PSTRIDE (unpack_info, 0);
/* first x tile to convert */
tx = x / tile_width;
tx = x >> ws;
/* Last tile to convert */
ntx = (x + width) / tile_width;
ntx = (x + width) >> ws;
/* The row we are going to convert */
ty = y / tile_height;
ty = y >> hs;
/* y position in a tile */
y = y & (tile_height - 1);
y = y & ((1 << hs) - 1);
/* x position in a tile */
x = x & (tile_width - 1);
@ -2155,7 +2156,7 @@ unpack_NV12T (const GstVideoFormatInfo * info, GstVideoPackFlags flags,
gint tstride[GST_VIDEO_MAX_PLANES];
gint unpack_width;
get_tile_NV12 (tile_width, tile_height, tile_size, tx, ty, x_tiles, y_tiles,
get_tile_NV12 (tile_width, ts, tx, ty, x_tiles, y_tiles,
data, stride, tdata, tstride);
/* the number of bytes left to unpack */
@ -2178,15 +2179,17 @@ pack_NV12T (const GstVideoFormatInfo * info, GstVideoPackFlags flags,
const GstVideoFormatInfo *pack_info, *finfo;
guint8 *line = src;
gint x_tiles, y_tiles;
gint tile_width, tile_height, tile_size;
gint ws, hs, ts, tile_width;
gint ntx, tx, ty;
gint pack_pstride;
tile_width = 1 << info->w_sub[3];
tile_height = 1 << info->h_sub[3];
tile_size = tile_width * tile_height;
ws = info->w_sub[GST_VIDEO_COMP_TILEINFO];
hs = info->h_sub[GST_VIDEO_COMP_TILEINFO];
ts = ws + hs;
x_tiles = stride[0] / 64;
tile_width = 1 << ws;
x_tiles = stride[0] >> ws;
y_tiles = stride[2];
/* we reuse these pack functions */
@ -2197,19 +2200,19 @@ pack_NV12T (const GstVideoFormatInfo * info, GstVideoPackFlags flags,
pack_pstride = GST_VIDEO_FORMAT_INFO_PSTRIDE (pack_info, 0);
/* Last tile to convert */
ntx = width / tile_width;
ntx = width >> ws;
/* The row we are going to convert */
ty = y / tile_height;
ty = y >> hs;
/* y position in a tile */
y = y & (tile_height - 1);
y = y & ((1 << hs) - 1);
for (tx = 0; tx < ntx; tx++) {
gpointer tdata[GST_VIDEO_MAX_PLANES];
gint tstride[GST_VIDEO_MAX_PLANES];
gint pack_width;
get_tile_NV12 (tile_width, tile_height, tile_size, tx, ty, x_tiles, y_tiles,
get_tile_NV12 (tile_width, ts, tx, ty, x_tiles, y_tiles,
data, stride, tdata, tstride);
/* the number of bytes left to pack */