[vlc-devel] [PATCH] chroma: add a filter to convert VLC_CODEC_I420_10L to VLC_CODEC_P010
Steve Lhomme
robux4 at videolabs.io
Thu Jul 28 14:46:35 CEST 2016
---
modules/video_chroma/Makefile.am | 6 ++
modules/video_chroma/copy.c | 40 +++++++++++
modules/video_chroma/copy.h | 3 +
modules/video_chroma/i420_10_p010.c | 132 ++++++++++++++++++++++++++++++++++++
4 files changed, 181 insertions(+)
create mode 100644 modules/video_chroma/i420_10_p010.c
diff --git a/modules/video_chroma/Makefile.am b/modules/video_chroma/Makefile.am
index 2c5265e..0545c9b 100644
--- a/modules/video_chroma/Makefile.am
+++ b/modules/video_chroma/Makefile.am
@@ -26,6 +26,11 @@ libi420_nv12_plugin_la_SOURCES = video_chroma/i420_nv12.c \
libi420_nv12_plugin_la_CPPFLAGS = $(AM_CPPFLAGS) \
-DMODULE_NAME_IS_i420_nv12
+libi420_10_p010_plugin_la_SOURCES = video_chroma/i420_10_p010.c \
+ video_chroma/copy.c video_chroma/copy.h
+libi420_10_p010_plugin_la_CPPFLAGS = $(AM_CPPFLAGS) \
+ -DMODULE_NAME_IS_i420_10_p010
+
libi422_i420_plugin_la_SOURCES = video_chroma/i422_i420.c
libi422_yuy2_plugin_la_SOURCES = video_chroma/i422_yuy2.c video_chroma/i422_yuy2.h
@@ -44,6 +49,7 @@ chroma_LTLIBRARIES = \
libi420_rgb_plugin.la \
libi420_yuy2_plugin.la \
libi420_nv12_plugin.la \
+ libi420_10_p010_plugin.la \
libi422_i420_plugin.la \
libi422_yuy2_plugin.la \
libgrey_yuv_plugin.la \
diff --git a/modules/video_chroma/copy.c b/modules/video_chroma/copy.c
index c053282..a0b1de5 100644
--- a/modules/video_chroma/copy.c
+++ b/modules/video_chroma/copy.c
@@ -521,6 +521,46 @@ void CopyFromI420ToNv12(picture_t *dst, uint8_t *src[3], size_t src_pitch[3],
}
}
+void CopyFromI420_10ToP010(picture_t *dst, uint8_t *src[3], size_t src_pitch[3],
+ unsigned height, copy_cache_t *cache)
+{
+ (void) cache;
+
+ const int i_extra_pitch_dst_y = (dst->p[0].i_pitch - src_pitch[0]) / 2;
+ const int i_extra_pitch_src_y = (src_pitch[Y_PLANE] - src_pitch[0]) / 2;
+ uint16_t *dstY = dst->p[0].p_pixels;
+ uint16_t *srcY = src[Y_PLANE];
+ for (unsigned y = 0; y < height; y++) {
+ for (unsigned x = 0; x < (src_pitch[0] / 2); x++) {
+ *dstY++ = *srcY++ << 6;
+ }
+ dstY += i_extra_pitch_dst_y;
+ srcY += i_extra_pitch_src_y;
+ }
+
+ const unsigned copy_lines = height / 2;
+ const unsigned copy_pitch = src_pitch[1] / 2;
+
+ const int i_extra_pitch_uv = dst->p[1].i_pitch / 2 - 2 * copy_pitch;
+ const int i_extra_pitch_u = src_pitch[U_PLANE] / 2 - copy_pitch;
+ const int i_extra_pitch_v = src_pitch[V_PLANE] / 2 - copy_pitch;
+
+ uint16_t *dstUV = dst->p[1].p_pixels;
+ uint16_t *srcU = src[U_PLANE];
+ uint16_t *srcV = src[V_PLANE];
+ for ( unsigned int line = 0; line < copy_lines; line++ )
+ {
+ for ( unsigned int col = 0; col < copy_pitch; col++ )
+ {
+ *dstUV++ = *srcU++ << 6;
+ *dstUV++ = *srcV++ << 6;
+ }
+ dstUV += i_extra_pitch_uv;
+ srcU += i_extra_pitch_u;
+ srcV += i_extra_pitch_v;
+ }
+}
+
void CopyFromYv12(picture_t *dst, uint8_t *src[3], size_t src_pitch[3],
unsigned height, copy_cache_t *cache)
diff --git a/modules/video_chroma/copy.h b/modules/video_chroma/copy.h
index 8776f95..f5a56cc 100644
--- a/modules/video_chroma/copy.h
+++ b/modules/video_chroma/copy.h
@@ -50,4 +50,7 @@ void CopyFromNv12ToI420(picture_t *dst, uint8_t *src[2], size_t src_pitch[2],
void CopyFromI420ToNv12(picture_t *dst, uint8_t *src[3], size_t src_pitch[3],
unsigned height, copy_cache_t *cache);
+void CopyFromI420_10ToP010(picture_t *dst, uint8_t *src[3], size_t src_pitch[3],
+ unsigned height, copy_cache_t *cache);
+
#endif
diff --git a/modules/video_chroma/i420_10_p010.c b/modules/video_chroma/i420_10_p010.c
new file mode 100644
index 0000000..dd65202
--- /dev/null
+++ b/modules/video_chroma/i420_10_p010.c
@@ -0,0 +1,132 @@
+/*****************************************************************************
+ * i420_10_P010.c : Planar YUV 4:2:0 to SemiPlanar P010 4:2:0
+ *****************************************************************************
+ * Copyright (C) 2016 VLC authors and VideoLAN
+ *
+ * Authors: Steve Lhomme <robux4 at videolabs.io>
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU Lesser General Public License as published by
+ * the Free Software Foundation; either version 2.1 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public License
+ * along with this program; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
+ *****************************************************************************/
+
+/*****************************************************************************
+ * Preamble
+ *****************************************************************************/
+
+#ifdef HAVE_CONFIG_H
+# include "config.h"
+#endif
+
+#include <vlc_common.h>
+#include <vlc_plugin.h>
+#include <vlc_filter.h>
+#include "copy.h"
+
+/*****************************************************************************
+ * Local and extern prototypes.
+ *****************************************************************************/
+static void I420_10_P010( filter_t *, picture_t *, picture_t * );
+static picture_t *I420_10_P010_Filter( filter_t *, picture_t * );
+
+struct filter_sys_t
+{
+ copy_cache_t cache;
+};
+
+/*****************************************************************************
+ * Create: allocate a chroma function
+ *****************************************************************************
+ * This function allocates and initializes a chroma function
+ *****************************************************************************/
+static int Create( vlc_object_t *p_this )
+{
+ filter_t *p_filter = (filter_t *)p_this;
+
+ if ( p_filter->fmt_out.video.i_chroma != VLC_CODEC_P010 )
+ return -1;
+
+ /* video must be even, because 4:2:0 is subsampled by 2 in both ways */
+ if( p_filter->fmt_in.video.i_width & 1
+ || p_filter->fmt_in.video.i_height & 1 )
+ {
+ return -1;
+ }
+
+ /* resizing not supported */
+ if( p_filter->fmt_in.video.i_x_offset + p_filter->fmt_in.video.i_visible_width !=
+ p_filter->fmt_out.video.i_x_offset + p_filter->fmt_out.video.i_visible_width
+ || p_filter->fmt_in.video.i_y_offset + p_filter->fmt_in.video.i_visible_height !=
+ p_filter->fmt_out.video.i_y_offset + p_filter->fmt_out.video.i_visible_height
+ || p_filter->fmt_in.video.orientation != p_filter->fmt_out.video.orientation )
+ return -1;
+
+ if ( p_filter->fmt_in.video.i_chroma != VLC_CODEC_I420_10L)
+ return -1;
+
+ filter_sys_t *p_sys = calloc(1, sizeof(filter_sys_t));
+ if (!p_sys)
+ return VLC_ENOMEM;
+
+ p_filter->pf_video_filter = I420_10_P010_Filter;
+ CopyInitCache( &p_sys->cache, p_filter->fmt_in.video.i_x_offset +
+ p_filter->fmt_in.video.i_visible_width );
+ p_filter->p_sys = p_sys;
+
+ return 0;
+}
+
+static void Delete(vlc_object_t *p_this)
+{
+ filter_t *p_filter = (filter_t *)p_this;
+ filter_sys_t *p_sys = p_filter->p_sys;
+ CopyCleanCache( &p_sys->cache );
+}
+
+/* Following functions are local */
+VIDEO_FILTER_WRAPPER( I420_10_P010 )
+
+/*****************************************************************************
+ * planar I420 4:2:0 10-bit Y:U:V to semiplanar P010 10/16-bit 4:2:0 Y:UV
+ *****************************************************************************/
+static void I420_10_P010( filter_t *p_filter, picture_t *p_src,
+ picture_t *p_dst )
+{
+ p_dst->format.i_x_offset = p_src->format.i_x_offset;
+ p_dst->format.i_y_offset = p_src->format.i_y_offset;
+
+ size_t pitch[3] = {
+ p_src->p[Y_PLANE].i_pitch,
+ p_src->p[U_PLANE].i_pitch,
+ p_src->p[V_PLANE].i_pitch,
+ };
+
+ uint8_t *plane[3] = {
+ (uint8_t*)p_src->p[Y_PLANE].p_pixels,
+ (uint8_t*)p_src->p[U_PLANE].p_pixels,
+ (uint8_t*)p_src->p[V_PLANE].p_pixels,
+ };
+
+ CopyFromI420_10ToP010( p_dst, plane, pitch,
+ p_src->format.i_y_offset + p_src->format.i_visible_height,
+ &p_filter->p_sys->cache );
+}
+
+/*****************************************************************************
+ * Module descriptor
+ *****************************************************************************/
+vlc_module_begin ()
+ set_description( N_("YUV 10-bits planar to semiplanar 10-bits conversions") )
+ set_capability( "video filter2", 160 )
+ set_callbacks( Create, Delete )
+vlc_module_end ()
--
2.8.2
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