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222 lines
7.7 KiB
222 lines
7.7 KiB
/*****************************************************************************
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* mash.c: Video decoder using openmash codec implementations
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*****************************************************************************
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* Copyright (C) 2004 the VideoLAN team
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* $Id$
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*
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* Authors: Sigmund Augdal <sigmunau@idi.ntnu.no>
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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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#include <vlc/vlc.h>
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#include <vlc/decoder.h>
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#include <vlc/vout.h>
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#include <p64/p64.h>
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/*****************************************************************************
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* decoder_sys_t : video decoder descriptor
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*****************************************************************************/
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struct decoder_sys_t
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{
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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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IntraP64Decoder *p_decoder;
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vlc_bool_t b_inited;
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int i_counter;
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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 void CloseDecoder ( vlc_object_t * );
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static void *DecodeBlock ( decoder_t *, block_t ** );
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#if 0
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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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#endif
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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( _("Video decoder using openmash") );
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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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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('h','2','6','1'):
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case VLC_FOURCC('H','2','6','1'):
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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_sys->i_pts = 0;
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p_sys->b_inited = VLC_FALSE;
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p_sys->i_counter = 0;
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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 = VLC_FOURCC('I','4','2','0');
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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_sys->p_decoder = new IntraP64Decoder();
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// foo->sync();
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return VLC_SUCCESS;
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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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/****************************************************************************
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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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picture_t *p_pic;
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uint32_t i_video_header;
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uint8_t *p_frame;
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int cc, sbit, ebit, mba, gob, quant, mvdh, mvdv;
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int i_width, i_height;
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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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i_video_header = *(uint32_t*)p_block->p_buffer; /* yes, it is native endian */
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sbit = i_video_header >> 29; /* start bit position */
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ebit = (i_video_header >> 26) & 7; /* end bit position */
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msg_Dbg( p_dec, "sbit, ebit: %d,%d", sbit, ebit );
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gob = (i_video_header >> 20) & 0xf; /* GOB number */
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if( gob > 12 )
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{
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msg_Warn( p_dec, "invalid gob, buggy vic streamer?");
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}
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mba = (i_video_header >> 15) & 0x1f; /* Macroblock address predictor */
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quant = (i_video_header >> 10) & 0x1f; /* quantizer */
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mvdh = (i_video_header >> 5) & 0x1f; /* horizontal motion vector data */
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mvdv = i_video_header & 0x1f; /* vertical motion vector data */
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cc = p_block->i_buffer - 4;
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msg_Dbg( p_dec, "packet size %d", cc );
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/* Find out p_vdec->i_raw_size */
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p_sys->p_decoder->decode( p_block->p_buffer + 4 /*bp?*/,
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cc /*cc?*/,
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sbit /*sbit?*/,
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ebit /*ebit?*/,
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mba /* mba?*/,
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gob /* gob?*/,
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quant /* quant?*/,
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mvdh /* mvdh?*/,
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mvdv /* mvdv?*/ );
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i_width = p_sys->p_decoder->width();
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i_height = p_sys->p_decoder->height();
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if( !p_sys->b_inited )
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{
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msg_Dbg( p_dec, "video size is perhaps %dx%d", i_width,
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i_height);
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vout_InitFormat( &p_dec->fmt_out.video, VLC_FOURCC('I','4','2','0'),
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i_width, i_height,
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VOUT_ASPECT_FACTOR * i_width / i_height );
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p_sys->b_inited = VLC_TRUE;
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}
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p_pic = NULL;
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p_sys->i_counter++;
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// p_sys->p_decoder->sync();
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if( p_block->i_flags & BLOCK_FLAG_END_OF_FRAME )
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{
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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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p_sys->p_decoder->sync();
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p_sys->i_counter = 0;
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p_frame = p_sys->p_decoder->frame();
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p_dec->p_vlc->pf_memcpy( p_pic->p[0].p_pixels, p_frame, i_width*i_height );
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p_frame += i_width * i_height;
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p_dec->p_vlc->pf_memcpy( p_pic->p[1].p_pixels, p_frame, i_width*i_height/4 );
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p_frame += i_width * i_height/4;
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p_dec->p_vlc->pf_memcpy( p_pic->p[2].p_pixels, p_frame, i_width*i_height/4 );
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p_pic->date = p_sys->i_pts;
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}
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block_Release( p_block);
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*pp_block = NULL;
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return p_pic;
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// return NULL;
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}
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