[vlc-commits] Add encoder for YCbCr 4:2:0 over RTP (RFC 4175)
Tristan Matthews
git at videolan.org
Wed Feb 4 21:37:16 CET 2015
vlc | branch: master | Tristan Matthews <tmatth at videolan.org> | Sat Jan 31 16:46:33 2015 +0000| [095bb638696ddb435232bc6a4401585d6b4eac3c] | committer: Tristan Matthews
Add encoder for YCbCr 4:2:0 over RTP (RFC 4175)
> http://git.videolan.org/gitweb.cgi/vlc.git/?a=commit;h=095bb638696ddb435232bc6a4401585d6b4eac3c
---
include/vlc_fourcc.h | 2 +
modules/codec/Makefile.am | 6 +++
modules/codec/rtpvideo.c | 108 +++++++++++++++++++++++++++++++++++++++++++++
3 files changed, 116 insertions(+)
diff --git a/include/vlc_fourcc.h b/include/vlc_fourcc.h
index 5f4f8f9..fd67797 100644
--- a/include/vlc_fourcc.h
+++ b/include/vlc_fourcc.h
@@ -275,6 +275,8 @@
#define VLC_CODEC_CYUV VLC_FOURCC('c','y','u','v')
/* 10-bit 4:2:2 Component YCbCr */
#define VLC_CODEC_V210 VLC_FOURCC('v','2','1','0')
+/* I420 packed for RTP (RFC 4175) */
+#define VLC_CODEC_R420 VLC_FOURCC('r','4','2','0')
/* RGB */
diff --git a/modules/codec/Makefile.am b/modules/codec/Makefile.am
index ebdbf78..0de32a0 100644
--- a/modules/codec/Makefile.am
+++ b/modules/codec/Makefile.am
@@ -99,6 +99,12 @@ codec_LTLIBRARIES += $(LTLIBlibmpeg2)
librawvideo_plugin_la_SOURCES = codec/rawvideo.c
codec_LTLIBRARIES += librawvideo_plugin.la
+librtpvideo_plugin_la_SOURCES = codec/rtpvideo.c
+if ENABLE_SOUT
+codec_LTLIBRARIES += librtpvideo_plugin.la
+endif
+
+
libschroedinger_plugin_la_SOURCES = codec/schroedinger.c
libschroedinger_plugin_la_CFLAGS = $(AM_CFLAGS) $(CFLAGS_schroedinger)
libschroedinger_plugin_la_LDFLAGS = $(AM_LDFLAGS) -rpath '$(codecdir)'
diff --git a/modules/codec/rtpvideo.c b/modules/codec/rtpvideo.c
new file mode 100644
index 0000000..e3fdd7b
--- /dev/null
+++ b/modules/codec/rtpvideo.c
@@ -0,0 +1,108 @@
+/*****************************************************************************
+ * rtpvideo.c: video encoder for raw video for RTP (see RFC 4175)
+ *****************************************************************************
+ * Copyright (C) 2015 VLC authors and VideoLAN
+ * $Id$
+ *
+ * Authors: Tristan Matthews <tmatth at videolan.org>
+ *
+ * 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_codec.h>
+
+/****************************************************************************
+ * Local prototypes
+ ****************************************************************************/
+static int OpenEncoder( vlc_object_t * );
+static block_t *Encode( encoder_t *p_enc, picture_t *p_pict );
+
+/*****************************************************************************
+ * Module descriptor
+ *****************************************************************************/
+vlc_module_begin ()
+ set_description( N_("Raw video encoder for RTP") )
+ set_capability( "encoder", 50 )
+ set_category( CAT_INPUT )
+ set_subcategory( SUBCAT_INPUT_VCODEC )
+ set_callbacks( OpenEncoder, NULL )
+ add_shortcut( "rtpvideo" )
+vlc_module_end ()
+
+static int OpenEncoder( vlc_object_t *p_this )
+{
+ encoder_t *p_enc = (encoder_t *)p_this;
+ if( p_enc->fmt_out.i_codec != VLC_CODEC_R420 && !p_enc->b_force )
+ return VLC_EGENERIC;
+
+ p_enc->pf_encode_video = Encode;
+ p_enc->fmt_in.i_codec = VLC_CODEC_I420;
+ p_enc->fmt_out.i_codec = VLC_CODEC_R420;
+
+ return VLC_SUCCESS;
+}
+
+static block_t *Encode( encoder_t *p_enc, picture_t *p_pict )
+{
+ VLC_UNUSED( p_enc );
+ if( !p_pict ) return NULL;
+
+ const int i_length = p_pict->p[0].i_visible_lines * p_pict->p[0].i_visible_pitch +
+ p_pict->p[1].i_visible_lines * p_pict->p[1].i_visible_pitch +
+ p_pict->p[2].i_visible_lines * p_pict->p[2].i_visible_pitch;
+
+ block_t *p_block = block_Alloc( i_length );
+ if( !p_block ) return NULL;
+
+ p_block->i_dts = p_block->i_pts = p_pict->date;
+ uint8_t *p_outdata = p_block->p_buffer;
+ const int i_xdec = 2;
+ const int i_ydec = 2;
+
+ const uint8_t *p_yd1 = p_pict->p[0].p_pixels;
+ const uint8_t *p_u = p_pict->p[1].p_pixels;
+ const uint8_t *p_v = p_pict->p[2].p_pixels;
+
+ /* Y00-Y01-Y10-Y11-U00-V00...luma from adjacent lines */
+ for( int i_lin = 0; i_lin < p_pict->p[0].i_visible_lines; i_lin += i_ydec )
+ {
+ const uint8_t *p_yd2 = p_yd1 + p_pict->p[0].i_pitch;
+ for ( int i_pix = 0; i_pix < p_pict->p[0].i_visible_pitch; i_pix += i_xdec )
+ {
+ *p_outdata++ = *p_yd1++;
+ *p_outdata++ = *p_yd1++;
+ *p_outdata++ = *p_yd2++;
+ *p_outdata++ = *p_yd2++;
+ *p_outdata++ = *p_u++;
+ *p_outdata++ = *p_v++;
+ }
+ /* Skip a line + padding */
+ p_yd1 += p_pict->p[0].i_pitch +
+ (p_pict->p[0].i_pitch - p_pict->p[0].i_visible_pitch);
+ p_u += p_pict->p[1].i_pitch - p_pict->p[1].i_visible_pitch;
+ p_v += p_pict->p[2].i_pitch - p_pict->p[2].i_visible_pitch;
+ }
+
+ return p_block;
+}
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