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/*****************************************************************************
* rtpvideo.c: video encoder for raw video for RTP (see RFC 4175)
*****************************************************************************
* Copyright (C) 2015 VLC authors and VideoLAN
* $Id$
*
* Authors: Tristan Matthews <tmatth@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->obj.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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