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384 lines
12 KiB
384 lines
12 KiB
/*****************************************************************************
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* rawvideo.c: Pseudo video decoder/packetizer for raw video data
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*****************************************************************************
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* Copyright (C) 2001, 2002 the VideoLAN team
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* $Id$
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*
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* Authors: Laurent Aimar <fenrir@via.ecp.fr>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 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 General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, 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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* decoder_sys_t : raw video decoder descriptor
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*****************************************************************************/
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struct decoder_sys_t
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{
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/* Module mode */
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bool b_packetizer;
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/*
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* Input properties
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*/
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size_t i_raw_size;
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bool b_invert;
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/*
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* Common properties
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*/
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date_t pts;
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};
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/****************************************************************************
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* Local prototypes
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****************************************************************************/
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static int OpenDecoder ( vlc_object_t * );
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static int OpenPacketizer( vlc_object_t * );
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static void CloseDecoder ( vlc_object_t * );
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static void *DecodeBlock ( decoder_t *, block_t ** );
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static picture_t *DecodeFrame( decoder_t *, block_t * );
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static block_t *SendFrame ( decoder_t *, block_t * );
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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_("Pseudo raw video decoder") )
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set_capability( "decoder", 50 )
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set_category( CAT_INPUT )
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set_subcategory( SUBCAT_INPUT_VCODEC )
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set_callbacks( OpenDecoder, CloseDecoder )
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add_submodule ()
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set_description( N_("Pseudo raw video packetizer") )
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set_capability( "packetizer", 100 )
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set_callbacks( OpenPacketizer, CloseDecoder )
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vlc_module_end ()
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/*****************************************************************************
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* OpenDecoder: probe the decoder and return score
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*****************************************************************************/
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static int OpenDecoder( vlc_object_t *p_this )
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{
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decoder_t *p_dec = (decoder_t*)p_this;
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decoder_sys_t *p_sys;
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switch( p_dec->fmt_in.i_codec )
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{
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/* Planar YUV */
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case VLC_CODEC_I444:
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case VLC_CODEC_J444:
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case VLC_CODEC_I422:
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case VLC_CODEC_J422:
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case VLC_CODEC_I420:
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case VLC_CODEC_J420:
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case VLC_CODEC_YV12:
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case VLC_CODEC_YV9:
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case VLC_CODEC_I411:
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case VLC_CODEC_I410:
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case VLC_CODEC_GREY:
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case VLC_CODEC_YUVP:
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/* Packed YUV */
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case VLC_CODEC_YUYV:
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case VLC_CODEC_YVYU:
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case VLC_CODEC_UYVY:
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case VLC_CODEC_VYUY:
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/* RGB */
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case VLC_CODEC_RGB32:
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case VLC_CODEC_RGB24:
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case VLC_CODEC_RGB16:
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case VLC_CODEC_RGB15:
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case VLC_CODEC_RGB8:
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case VLC_CODEC_RGBP:
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break;
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default:
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return VLC_EGENERIC;
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}
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/* Allocate the memory needed to store the decoder's structure */
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if( ( p_dec->p_sys = p_sys =
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(decoder_sys_t *)malloc(sizeof(decoder_sys_t)) ) == NULL )
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return VLC_ENOMEM;
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/* Misc init */
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p_dec->p_sys->b_packetizer = false;
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p_sys->b_invert = 0;
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if( (int)p_dec->fmt_in.video.i_height < 0 )
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{
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/* Frames are coded from bottom to top */
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p_dec->fmt_in.video.i_height =
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(unsigned int)(-(int)p_dec->fmt_in.video.i_height);
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p_sys->b_invert = true;
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}
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if( p_dec->fmt_in.video.i_width <= 0 || p_dec->fmt_in.video.i_height <= 0 )
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{
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msg_Err( p_dec, "invalid display size %dx%d",
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p_dec->fmt_in.video.i_width, p_dec->fmt_in.video.i_height );
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return VLC_EGENERIC;
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}
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es_format_Copy( &p_dec->fmt_out, &p_dec->fmt_in );
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date_Init( &p_sys->pts, p_dec->fmt_out.video.i_frame_rate,
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p_dec->fmt_out.video.i_frame_rate_base );
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if( p_dec->fmt_out.video.i_frame_rate == 0 ||
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p_dec->fmt_out.video.i_frame_rate_base == 0)
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{
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msg_Warn( p_dec, "invalid frame rate %d/%d, using 25 fps instead",
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p_dec->fmt_out.video.i_frame_rate,
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p_dec->fmt_out.video.i_frame_rate_base);
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date_Init( &p_sys->pts, 25, 1 );
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}
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/* Find out p_vdec->i_raw_size */
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video_format_Setup( &p_dec->fmt_out.video, p_dec->fmt_in.i_codec,
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p_dec->fmt_in.video.i_width,
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p_dec->fmt_in.video.i_height,
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p_dec->fmt_in.video.i_sar_num,
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p_dec->fmt_in.video.i_sar_den );
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p_sys->i_raw_size = p_dec->fmt_out.video.i_bits_per_pixel *
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p_dec->fmt_out.video.i_width * p_dec->fmt_out.video.i_height / 8;
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if( !p_dec->fmt_in.video.i_sar_num || !p_dec->fmt_in.video.i_sar_den )
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{
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p_dec->fmt_out.video.i_sar_num = 1;
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p_dec->fmt_out.video.i_sar_den = 1;
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}
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/* Set callbacks */
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p_dec->pf_decode_video = (picture_t *(*)(decoder_t *, block_t **))
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DecodeBlock;
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p_dec->pf_packetize = (block_t *(*)(decoder_t *, block_t **))
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DecodeBlock;
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return VLC_SUCCESS;
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}
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static int OpenPacketizer( vlc_object_t *p_this )
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{
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decoder_t *p_dec = (decoder_t*)p_this;
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int i_ret = OpenDecoder( p_this );
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if( i_ret == VLC_SUCCESS ) p_dec->p_sys->b_packetizer = true;
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return i_ret;
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}
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/****************************************************************************
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* DecodeBlock: the whole thing
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****************************************************************************
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* This function must be fed with complete frames.
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****************************************************************************/
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static void *DecodeBlock( decoder_t *p_dec, block_t **pp_block )
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{
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decoder_sys_t *p_sys = p_dec->p_sys;
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block_t *p_block;
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void *p_buf;
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if( !pp_block || !*pp_block ) return NULL;
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p_block = *pp_block;
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if( p_block->i_pts <= VLC_TS_INVALID && p_block->i_dts <= VLC_TS_INVALID &&
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!date_Get( &p_sys->pts ) )
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{
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/* We've just started the stream, wait for the first PTS. */
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block_Release( p_block );
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return NULL;
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}
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/* Date management: If there is a pts avaliable, use that. */
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if( p_block->i_pts > VLC_TS_INVALID )
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{
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date_Set( &p_sys->pts, p_block->i_pts );
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}
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else if( p_block->i_dts > VLC_TS_INVALID )
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{
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/* NB, davidf doesn't quite agree with this in general, it is ok
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* for rawvideo since it is in order (ie pts=dts), however, it
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* may not be ok for an out-of-order codec, so don't copy this
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* without thinking */
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date_Set( &p_sys->pts, p_block->i_dts );
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}
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if( p_block->i_buffer < p_sys->i_raw_size )
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{
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msg_Warn( p_dec, "invalid frame size (%zu < %zu)",
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p_block->i_buffer, p_sys->i_raw_size );
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block_Release( p_block );
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return NULL;
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}
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if( p_sys->b_packetizer )
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{
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p_buf = SendFrame( p_dec, p_block );
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}
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else
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{
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p_buf = DecodeFrame( p_dec, p_block );
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}
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/* Date management: 1 frame per packet */
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date_Increment( &p_sys->pts, 1 );
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*pp_block = NULL;
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return p_buf;
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}
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/*****************************************************************************
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* FillPicture:
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*****************************************************************************/
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static void FillPicture( decoder_t *p_dec, block_t *p_block, picture_t *p_pic )
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{
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int i_plane;
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decoder_sys_t *p_sys = p_dec->p_sys;
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uint8_t *p_src = p_block->p_buffer;
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for( i_plane = 0; i_plane < p_pic->i_planes; i_plane++ )
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{
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int i_pitch = p_pic->p[i_plane].i_pitch;
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int i_visible_pitch = p_pic->p[i_plane].i_visible_pitch;
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int i_visible_lines = p_pic->p[i_plane].i_visible_lines;
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uint8_t *p_dst = p_pic->p[i_plane].p_pixels;
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uint8_t *p_dst_end = p_dst+i_pitch*i_visible_lines;
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if( p_sys->b_invert )
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for( p_dst_end -= i_pitch; p_dst <= p_dst_end;
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p_dst_end -= i_pitch, p_src += i_visible_pitch )
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vlc_memcpy( p_dst_end, p_src, i_visible_pitch );
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else
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for( ; p_dst < p_dst_end;
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p_dst += i_pitch, p_src += i_visible_pitch )
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vlc_memcpy( p_dst, p_src, i_visible_pitch );
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}
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}
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/*****************************************************************************
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* DecodeFrame: decodes a video frame.
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*****************************************************************************/
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static picture_t *DecodeFrame( decoder_t *p_dec, block_t *p_block )
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{
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decoder_sys_t *p_sys = p_dec->p_sys;
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picture_t *p_pic;
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/* Get a new picture */
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p_pic = decoder_NewPicture( p_dec );
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if( !p_pic )
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{
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block_Release( p_block );
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return NULL;
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}
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FillPicture( p_dec, p_block, p_pic );
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p_pic->date = date_Get( &p_sys->pts );
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if( p_block->i_flags & BLOCK_FLAG_INTERLACED_MASK )
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{
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p_pic->b_progressive = false;
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p_pic->i_nb_fields = 2;
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if( p_block->i_flags & BLOCK_FLAG_TOP_FIELD_FIRST )
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p_pic->b_top_field_first = true;
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else
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p_pic->b_top_field_first = false;
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}
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else
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p_pic->b_progressive = true;
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block_Release( p_block );
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return p_pic;
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}
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/*****************************************************************************
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* SendFrame: send a video frame to the stream output.
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*****************************************************************************/
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static block_t *SendFrame( decoder_t *p_dec, block_t *p_block )
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{
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decoder_sys_t *p_sys = p_dec->p_sys;
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p_block->i_dts = p_block->i_pts = date_Get( &p_sys->pts );
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if( p_sys->b_invert )
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{
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picture_t pic;
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uint8_t *p_tmp, *p_pixels;
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int i, j;
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/* Fill in picture_t fields */
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picture_Setup( &pic, p_dec->fmt_out.i_codec,
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p_dec->fmt_out.video.i_width,
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p_dec->fmt_out.video.i_height, 0, 1 );
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if( !pic.i_planes )
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{
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msg_Err( p_dec, "unsupported chroma" );
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return p_block;
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}
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p_tmp = malloc( pic.p[0].i_pitch );
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if( !p_tmp )
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return p_block;
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p_pixels = p_block->p_buffer;
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for( i = 0; i < pic.i_planes; i++ )
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{
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int i_pitch = pic.p[i].i_pitch;
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uint8_t *p_top = p_pixels;
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uint8_t *p_bottom = p_pixels + i_pitch *
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(pic.p[i].i_visible_lines - 1);
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for( j = 0; j < pic.p[i].i_visible_lines / 2; j++ )
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{
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vlc_memcpy( p_tmp, p_bottom, pic.p[i].i_visible_pitch );
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vlc_memcpy( p_bottom, p_top, pic.p[i].i_visible_pitch );
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vlc_memcpy( p_top, p_tmp, pic.p[i].i_visible_pitch );
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p_top += i_pitch;
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p_bottom -= i_pitch;
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}
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p_pixels += i_pitch * pic.p[i].i_lines;
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}
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free( p_tmp );
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}
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return p_block;
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}
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/*****************************************************************************
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* CloseDecoder: decoder destruction
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*****************************************************************************/
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static void CloseDecoder( vlc_object_t *p_this )
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{
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decoder_t *p_dec = (decoder_t*)p_this;
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free( p_dec->p_sys );
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}
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