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363 lines
12 KiB
363 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., 59 Temple Place - Suite 330, Boston, MA 02111, USA.
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*****************************************************************************/
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/*****************************************************************************
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* Preamble
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*****************************************************************************/
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#include <vlc/vlc.h>
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#include <vlc/decoder.h>
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#include <vlc/vout.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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vlc_bool_t b_packetizer;
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/*
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* Input properties
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*/
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int i_raw_size;
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vlc_bool_t b_invert;
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/*
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* Common properties
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*/
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mtime_t i_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( _("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( _("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_FOURCC('I','4','4','4'):
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case VLC_FOURCC('I','4','2','2'):
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case VLC_FOURCC('I','4','2','0'):
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case VLC_FOURCC('Y','V','1','2'):
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case VLC_FOURCC('I','Y','U','V'):
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case VLC_FOURCC('I','4','1','1'):
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case VLC_FOURCC('I','4','1','0'):
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case VLC_FOURCC('Y','V','U','9'):
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/* Packed YUV */
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case VLC_FOURCC('Y','U','Y','2'):
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case VLC_FOURCC('U','Y','V','Y'):
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/* RGB */
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case VLC_FOURCC('R','V','3','2'):
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case VLC_FOURCC('R','V','2','4'):
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case VLC_FOURCC('R','V','1','6'):
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case VLC_FOURCC('R','V','1','5'):
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break;
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case VLC_FOURCC('y','v','1','2'):
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p_dec->fmt_in.i_codec = VLC_FOURCC('Y','V','1','2');
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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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{
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msg_Err( p_dec, "out of memory" );
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return VLC_EGENERIC;
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}
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/* Misc init */
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p_dec->p_sys->b_packetizer = VLC_FALSE;
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p_sys->i_pts = 0;
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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 = VLC_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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/* Find out p_vdec->i_raw_size */
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vout_InitFormat( &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_aspect );
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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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/* Set output properties */
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p_dec->fmt_out.i_cat = VIDEO_ES;
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p_dec->fmt_out.i_codec = p_dec->fmt_in.i_codec;
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if( !p_dec->fmt_in.video.i_aspect )
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{
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p_dec->fmt_out.video.i_aspect = VOUT_ASPECT_FACTOR *
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p_dec->fmt_out.video.i_width / p_dec->fmt_out.video.i_height;
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}
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else p_dec->fmt_out.video.i_aspect = p_dec->fmt_in.video.i_aspect;
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if( p_dec->fmt_in.video.i_rmask )
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p_dec->fmt_out.video.i_rmask = p_dec->fmt_in.video.i_rmask;
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if( p_dec->fmt_in.video.i_gmask )
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p_dec->fmt_out.video.i_gmask = p_dec->fmt_in.video.i_gmask;
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if( p_dec->fmt_in.video.i_bmask )
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p_dec->fmt_out.video.i_bmask = p_dec->fmt_in.video.i_bmask;
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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 = VLC_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_sys->i_pts && !p_block->i_pts && !p_block->i_dts )
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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 */
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if( p_block->i_pts > 0 || p_block->i_dts > 0 )
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{
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if( p_block->i_pts > 0 ) p_sys->i_pts = p_block->i_pts;
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else if( p_block->i_dts > 0 ) p_sys->i_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 (%d < %d)",
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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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p_sys->i_pts += ( I64C(1000000) * 1.0 / 25 /*FIXME*/ );
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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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uint8_t *p_src, *p_dst;
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int i_src, i_plane, i_line, i_width;
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decoder_sys_t *p_sys = p_dec->p_sys;
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p_src = p_block->p_buffer;
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i_src = p_block->i_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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p_dst = p_pic->p[i_plane].p_pixels;
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i_width = p_pic->p[i_plane].i_visible_pitch;
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if( p_sys->b_invert )
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p_src += (i_width * (p_pic->p[i_plane].i_visible_lines - 1));
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for( i_line = 0; i_line < p_pic->p[i_plane].i_visible_lines; i_line++ )
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{
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p_dec->p_vlc->pf_memcpy( p_dst, p_src, i_width );
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p_src += p_sys->b_invert ? -i_width : i_width;
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p_dst += p_pic->p[i_plane].i_pitch;
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}
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if( p_sys->b_invert )
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p_src += (i_width * (p_pic->p[i_plane].i_visible_lines + 1));
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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 = p_dec->pf_vout_buffer_new( 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 = p_sys->i_pts;
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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 = p_sys->i_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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vout_InitPicture( VLC_OBJECT(p_dec), &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, VOUT_ASPECT_FACTOR );
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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_visible_pitch );
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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_visible_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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p_dec->p_vlc->pf_memcpy( p_tmp, p_bottom,
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pic.p[i].i_visible_pitch );
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p_dec->p_vlc->pf_memcpy( p_bottom, p_top,
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pic.p[i].i_visible_pitch );
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p_dec->p_vlc->pf_memcpy( p_top, p_tmp,
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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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