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/*****************************************************************************
* mash.c: Video decoder using openmash codec implementations
*****************************************************************************
* Copyright (C) 2004 the VideoLAN team
* $Id: 86245790fae8a825ba15199775934d749bf7841e $
*
* Authors: Sigmund Augdal <sigmunau@idi.ntnu.no>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 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 General Public License for more details.
*
* You should have received a copy of the GNU 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>
#include <vlc_block.h>
#include <p64/p64.h>
/*****************************************************************************
* decoder_sys_t : video decoder descriptor
*****************************************************************************/
struct decoder_sys_t
{
/*
* Common properties
*/
mtime_t i_pts;
IntraP64Decoder *p_decoder;
bool b_inited;
int i_counter;
};
/****************************************************************************
* Local prototypes
****************************************************************************/
static int OpenDecoder ( vlc_object_t * );
static void CloseDecoder ( vlc_object_t * );
static void *DecodeBlock ( decoder_t *, block_t ** );
#if 0
static picture_t *DecodeFrame( decoder_t *, block_t * );
static block_t *SendFrame ( decoder_t *, block_t * );
#endif
/*****************************************************************************
* Module descriptor
*****************************************************************************/
vlc_module_begin ()
set_description( N_("Video decoder using openmash") )
set_capability( "decoder", 50 )
set_category( CAT_INPUT )
set_subcategory( SUBCAT_INPUT_VCODEC )
set_callbacks( OpenDecoder, CloseDecoder )
vlc_module_end ()
/*****************************************************************************
* OpenDecoder: probe the decoder and return score
*****************************************************************************/
static int OpenDecoder( vlc_object_t *p_this )
{
decoder_t *p_dec = (decoder_t*)p_this;
decoder_sys_t *p_sys;
switch( p_dec->fmt_in.i_codec )
{
/* Planar YUV */
case VLC_CODEC_H261:
break;
default:
return VLC_EGENERIC;
}
/* Allocate the memory needed to store the decoder's structure */
if( ( p_dec->p_sys = p_sys =
(decoder_sys_t *)malloc(sizeof(decoder_sys_t)) ) == NULL )
return VLC_ENOMEM;
/* Misc init */
p_sys->i_pts = VLC_TS_INVALID;
p_sys->b_inited = false;
p_sys->i_counter = 0;
/* Set output properties */
p_dec->fmt_out.i_cat = VIDEO_ES;
p_dec->fmt_out.i_codec = VLC_CODEC_I420;
/* Set callbacks */
p_dec->pf_decode_video = (picture_t *(*)(decoder_t *, block_t **))
DecodeBlock;
p_sys->p_decoder = new IntraP64Decoder();
// foo->sync();
return VLC_SUCCESS;
}
/*****************************************************************************
* CloseDecoder: decoder destruction
*****************************************************************************/
static void CloseDecoder( vlc_object_t *p_this )
{
decoder_t *p_dec = (decoder_t*)p_this;
free( p_dec->p_sys );
}
/****************************************************************************
* DecodeBlock: the whole thing
****************************************************************************
* This function must be fed with complete frames.
****************************************************************************/
static void *DecodeBlock( decoder_t *p_dec, block_t **pp_block )
{
decoder_sys_t *p_sys = p_dec->p_sys;
block_t *p_block;
picture_t *p_pic;
uint32_t i_video_header;
uint8_t *p_frame;
int cc, sbit, ebit, mba, gob, quant, mvdh, mvdv;
int i_width, i_height;
if( !pp_block || !*pp_block ) return NULL;
p_block = *pp_block;
if( p_sys->i_pts <= VLC_TS_INVALID && p_block->i_pts <= VLC_TS_INVALID &&
p_block->i_dts <= VLC_TS_INVALID )
{
/* We've just started the stream, wait for the first PTS. */
block_Release( p_block );
return NULL;
}
/* Date management */
if( p_block->i_pts > VLC_TS_INVALID )
p_sys->i_pts = p_block->i_pts;
else if( p_block->i_dts > VLC_TS_INVALID )
p_sys->i_pts = p_block->i_dts;
i_video_header = *(uint32_t*)p_block->p_buffer; /* yes, it is native endian */
sbit = i_video_header >> 29; /* start bit position */
ebit = (i_video_header >> 26) & 7; /* end bit position */
msg_Dbg( p_dec, "sbit, ebit: %d,%d", sbit, ebit );
gob = (i_video_header >> 20) & 0xf; /* GOB number */
if( gob > 12 )
{
msg_Warn( p_dec, "invalid gob, buggy vic streamer?");
}
mba = (i_video_header >> 15) & 0x1f; /* Macroblock address predictor */
quant = (i_video_header >> 10) & 0x1f; /* quantizer */
mvdh = (i_video_header >> 5) & 0x1f; /* horizontal motion vector data */
mvdv = i_video_header & 0x1f; /* vertical motion vector data */
cc = p_block->i_buffer - 4;
msg_Dbg( p_dec, "packet size %d", cc );
/* Find out p_vdec->i_raw_size */
p_sys->p_decoder->decode( p_block->p_buffer + 4 /*bp?*/,
cc /*cc?*/,
sbit /*sbit?*/,
ebit /*ebit?*/,
mba /* mba?*/,
gob /* gob?*/,
quant /* quant?*/,
mvdh /* mvdh?*/,
mvdv /* mvdv?*/ );
i_width = p_sys->p_decoder->width();
i_height = p_sys->p_decoder->height();
if( !p_sys->b_inited )
{
msg_Dbg( p_dec, "video size is perhaps %dx%d", i_width,
i_height);
video_format_Setup( &p_dec->fmt_out.video, VLC_CODEC_I420,
i_width, i_height,
1, 1 );
p_sys->b_inited = true;
}
p_pic = NULL;
p_sys->i_counter++;
// p_sys->p_decoder->sync();
if( p_block->i_flags & BLOCK_FLAG_END_OF_FRAME )
{
p_pic = decoder_NewPicture( p_dec );
if( !p_pic )
{
block_Release( p_block );
return NULL;
}
p_sys->p_decoder->sync();
p_sys->i_counter = 0;
p_frame = p_sys->p_decoder->frame();
vlc_memcpy( p_dec, p_pic->p[0].p_pixels, p_frame, i_width*i_height );
p_frame += i_width * i_height;
vlc_memcpy( p_dec, p_pic->p[1].p_pixels, p_frame, i_width*i_height/4 );
p_frame += i_width * i_height/4;
vlc_memcpy( p_dec, p_pic->p[2].p_pixels, p_frame, i_width*i_height/4 );
p_pic->date = p_sys->i_pts;
}
block_Release( p_block);
*pp_block = NULL;
return p_pic;
// return NULL;
}
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