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108 lines
4.0 KiB
108 lines
4.0 KiB
/*****************************************************************************
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* rtpvideo.c: video encoder for raw video for RTP (see RFC 4175)
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*****************************************************************************
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* Copyright (C) 2015 VLC authors and VideoLAN
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* $Id$
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*
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* Authors: Tristan Matthews <tmatth@videolan.org>
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU Lesser General Public License as published by
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* the Free Software Foundation; either version 2.1 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public License
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* along with this program; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
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*****************************************************************************/
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/*****************************************************************************
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* Preamble
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*****************************************************************************/
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#ifdef HAVE_CONFIG_H
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# include "config.h"
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#endif
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#include <vlc_common.h>
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#include <vlc_plugin.h>
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#include <vlc_codec.h>
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/****************************************************************************
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* Local prototypes
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****************************************************************************/
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static int OpenEncoder( vlc_object_t * );
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static block_t *Encode( encoder_t *p_enc, picture_t *p_pict );
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/*****************************************************************************
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* Module descriptor
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*****************************************************************************/
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vlc_module_begin ()
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set_description( N_("Raw video encoder for RTP") )
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set_capability( "encoder", 50 )
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set_category( CAT_INPUT )
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set_subcategory( SUBCAT_INPUT_VCODEC )
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set_callbacks( OpenEncoder, NULL )
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add_shortcut( "rtpvideo" )
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vlc_module_end ()
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static int OpenEncoder( vlc_object_t *p_this )
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{
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encoder_t *p_enc = (encoder_t *)p_this;
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if( p_enc->fmt_out.i_codec != VLC_CODEC_R420 && !p_enc->b_force )
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return VLC_EGENERIC;
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p_enc->pf_encode_video = Encode;
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p_enc->fmt_in.i_codec = VLC_CODEC_I420;
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p_enc->fmt_out.i_codec = VLC_CODEC_R420;
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return VLC_SUCCESS;
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}
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static block_t *Encode( encoder_t *p_enc, picture_t *p_pict )
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{
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VLC_UNUSED( p_enc );
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if( !p_pict ) return NULL;
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const int i_length = p_pict->p[0].i_visible_lines * p_pict->p[0].i_visible_pitch +
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p_pict->p[1].i_visible_lines * p_pict->p[1].i_visible_pitch +
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p_pict->p[2].i_visible_lines * p_pict->p[2].i_visible_pitch;
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block_t *p_block = block_Alloc( i_length );
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if( !p_block ) return NULL;
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p_block->i_dts = p_block->i_pts = p_pict->date;
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uint8_t *p_outdata = p_block->p_buffer;
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const int i_xdec = 2;
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const int i_ydec = 2;
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const uint8_t *p_yd1 = p_pict->p[0].p_pixels;
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const uint8_t *p_u = p_pict->p[1].p_pixels;
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const uint8_t *p_v = p_pict->p[2].p_pixels;
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/* Y00-Y01-Y10-Y11-U00-V00...luma from adjacent lines */
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for( int i_lin = 0; i_lin < p_pict->p[0].i_visible_lines; i_lin += i_ydec )
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{
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const uint8_t *p_yd2 = p_yd1 + p_pict->p[0].i_pitch;
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for ( int i_pix = 0; i_pix < p_pict->p[0].i_visible_pitch; i_pix += i_xdec )
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{
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*p_outdata++ = *p_yd1++;
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*p_outdata++ = *p_yd1++;
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*p_outdata++ = *p_yd2++;
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*p_outdata++ = *p_yd2++;
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*p_outdata++ = *p_u++;
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*p_outdata++ = *p_v++;
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}
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/* Skip a line + padding */
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p_yd1 += p_pict->p[0].i_pitch +
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(p_pict->p[0].i_pitch - p_pict->p[0].i_visible_pitch);
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p_u += p_pict->p[1].i_pitch - p_pict->p[1].i_visible_pitch;
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p_v += p_pict->p[2].i_pitch - p_pict->p[2].i_visible_pitch;
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}
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return p_block;
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}
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