copy.c
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上传日期:2009-03-27
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- /*****************************************************************************
- * copy.c
- *****************************************************************************
- * Copyright (C) 2001, 2002 VideoLAN
- * $Id: copy.c 7812 2004-05-29 14:00:32Z fenrir $
- *
- * Authors: Laurent Aimar <fenrir@via.ecp.fr>
- * Eric Petit <titer@videolan.org>
- *
- * 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., 59 Temple Place - Suite 330, Boston, MA 02111, USA.
- *****************************************************************************/
- /*****************************************************************************
- * Preamble
- *****************************************************************************/
- #include <stdlib.h> /* malloc(), free() */
- #include <vlc/vlc.h>
- #include <vlc/decoder.h>
- #include <vlc/input.h>
- /*****************************************************************************
- * Module descriptor
- *****************************************************************************/
- static int Open ( vlc_object_t * );
- static void Close( vlc_object_t * );
- vlc_module_begin();
- set_description( _("Copy packetizer") );
- set_capability( "packetizer", 1 );
- set_callbacks( Open, Close );
- vlc_module_end();
- /*****************************************************************************
- * Local prototypes
- *****************************************************************************/
- struct decoder_sys_t
- {
- block_t *p_block;
- };
- static block_t *Packetize ( decoder_t *, block_t ** );
- static block_t *PacketizeSub( decoder_t *, block_t ** );
- /*****************************************************************************
- * Open: probe the packetizer and return score
- *****************************************************************************
- * Tries to launch a decoder and return score so that the interface is able
- * to choose.
- *****************************************************************************/
- static int Open( vlc_object_t *p_this )
- {
- decoder_t *p_dec = (decoder_t*)p_this;
- decoder_sys_t *p_sys;
- if( p_dec->fmt_in.i_cat != AUDIO_ES &&
- p_dec->fmt_in.i_cat != VIDEO_ES &&
- p_dec->fmt_in.i_cat != SPU_ES )
- {
- msg_Err( p_dec, "invalid ES type" );
- return VLC_EGENERIC;
- }
- if( p_dec->fmt_in.i_cat == SPU_ES )
- p_dec->pf_packetize = PacketizeSub;
- else
- p_dec->pf_packetize = Packetize;
- /* Create the output format */
- es_format_Copy( &p_dec->fmt_out, &p_dec->fmt_in );
- /* Fix the value of the fourcc */
- switch( p_dec->fmt_in.i_codec )
- {
- /* video */
- case VLC_FOURCC( 'm', '4', 's', '2'):
- case VLC_FOURCC( 'M', '4', 'S', '2'):
- case VLC_FOURCC( 'm', 'p', '4', 's'):
- case VLC_FOURCC( 'M', 'P', '4', 'S'):
- case VLC_FOURCC( 'D', 'I', 'V', 'X'):
- case VLC_FOURCC( 'd', 'i', 'v', 'x'):
- case VLC_FOURCC( 'X', 'V', 'I', 'D'):
- case VLC_FOURCC( 'X', 'v', 'i', 'D'):
- case VLC_FOURCC( 'x', 'v', 'i', 'd'):
- case VLC_FOURCC( 'D', 'X', '5', '0'):
- case VLC_FOURCC( 0x04, 0, 0, 0):
- case VLC_FOURCC( '3', 'I', 'V', '2'):
- p_dec->fmt_out.i_codec = VLC_FOURCC( 'm', 'p', '4', 'v');
- break;
- case VLC_FOURCC( 'm', 'p', 'g', '1' ):
- case VLC_FOURCC( 'm', 'p', 'g', '2' ):
- case VLC_FOURCC( 'm', 'p', '1', 'v' ):
- case VLC_FOURCC( 'm', 'p', '2', 'v' ):
- p_dec->fmt_out.i_codec = VLC_FOURCC( 'm', 'p', 'g', 'v' );
- break;
- case VLC_FOURCC( 'd', 'i', 'v', '1' ):
- case VLC_FOURCC( 'M', 'P', 'G', '4' ):
- case VLC_FOURCC( 'm', 'p', 'g', '4' ):
- p_dec->fmt_out.i_codec = VLC_FOURCC( 'D', 'I', 'V', '1' );
- break;
- case VLC_FOURCC( 'd', 'i', 'v', '2' ):
- case VLC_FOURCC( 'M', 'P', '4', '2' ):
- case VLC_FOURCC( 'm', 'p', '4', '2' ):
- p_dec->fmt_out.i_codec = VLC_FOURCC( 'D', 'I', 'V', '2' );
- break;
- case VLC_FOURCC( 'd', 'i', 'v', '3' ):
- case VLC_FOURCC( 'd', 'i', 'v', '4' ):
- case VLC_FOURCC( 'D', 'I', 'V', '4' ):
- case VLC_FOURCC( 'd', 'i', 'v', '5' ):
- case VLC_FOURCC( 'D', 'I', 'V', '5' ):
- case VLC_FOURCC( 'd', 'i', 'v', '6' ):
- case VLC_FOURCC( 'D', 'I', 'V', '6' ):
- case VLC_FOURCC( 'M', 'P', '4', '3' ):
- case VLC_FOURCC( 'm', 'p', '4', '3' ):
- case VLC_FOURCC( 'm', 'p', 'g', '3' ):
- case VLC_FOURCC( 'M', 'P', 'G', '3' ):
- case VLC_FOURCC( 'A', 'P', '4', '1' ):
- p_dec->fmt_out.i_codec = VLC_FOURCC( 'D', 'I', 'V', '3' );
- break;
- case VLC_FOURCC( 'h', '2', '6', '3' ):
- case VLC_FOURCC( 'U', '2', '6', '3' ):
- case VLC_FOURCC( 'u', '2', '6', '3' ):
- p_dec->fmt_out.i_codec = VLC_FOURCC( 'H', '2', '6', '3' );
- break;
- case VLC_FOURCC( 'i', '2', '6', '3' ):
- p_dec->fmt_out.i_codec = VLC_FOURCC( 'I', '2', '6', '3' );
- break;
- case VLC_FOURCC( 'm', 'j', 'p', 'g' ):
- case VLC_FOURCC( 'm', 'j', 'p', 'a' ):
- case VLC_FOURCC( 'j', 'p', 'e', 'g' ):
- case VLC_FOURCC( 'J', 'P', 'E', 'G' ):
- case VLC_FOURCC( 'J', 'F', 'I', 'F' ):
- p_dec->fmt_out.i_codec = VLC_FOURCC( 'M', 'J', 'P', 'G' );
- break;
- case VLC_FOURCC( 'd', 'v', 's', 'd' ):
- case VLC_FOURCC( 'D', 'V', 'S', 'D' ):
- case VLC_FOURCC( 'd', 'v', 'h', 'd' ):
- p_dec->fmt_out.i_codec = VLC_FOURCC( 'd', 'v', 's', 'l' );
- break;
- /* audio */
- case VLC_FOURCC( 'a', 'r', 'a', 'w' ):
- switch( ( p_dec->fmt_in.audio.i_bitspersample + 7 ) / 8 )
- {
- case 1:
- p_dec->fmt_out.i_codec = VLC_FOURCC('u','8',' ',' ');
- break;
- case 2:
- p_dec->fmt_out.i_codec = VLC_FOURCC('s','1','6','l');
- break;
- case 3:
- p_dec->fmt_out.i_codec = VLC_FOURCC('s','2','4','l');
- break;
- case 4:
- p_dec->fmt_out.i_codec = VLC_FOURCC('s','3','2','l');
- break;
- default:
- msg_Err( p_dec, "unknown raw audio sample size" );
- return VLC_EGENERIC;
- }
- break;
- case VLC_FOURCC( 't', 'w', 'o', 's' ):
- switch( ( p_dec->fmt_in.audio.i_bitspersample + 7 ) / 8 )
- {
- case 1:
- p_dec->fmt_out.i_codec = VLC_FOURCC('s','8',' ',' ');
- break;
- case 2:
- p_dec->fmt_out.i_codec = VLC_FOURCC('s','1','6','b');
- break;
- case 3:
- p_dec->fmt_out.i_codec = VLC_FOURCC('s','2','4','b');
- break;
- case 4:
- p_dec->fmt_out.i_codec = VLC_FOURCC('s','3','2','b');
- break;
- default:
- msg_Err( p_dec, "unknown raw audio sample size" );
- return VLC_EGENERIC;
- }
- break;
- case VLC_FOURCC( 's', 'o', 'w', 't' ):
- switch( ( p_dec->fmt_in.audio.i_bitspersample + 7 ) / 8 )
- {
- case 1:
- p_dec->fmt_out.i_codec = VLC_FOURCC('s','8',' ',' ');
- break;
- case 2:
- p_dec->fmt_out.i_codec = VLC_FOURCC('s','1','6','l');
- break;
- case 3:
- p_dec->fmt_out.i_codec = VLC_FOURCC('s','2','4','l');
- break;
- case 4:
- p_dec->fmt_out.i_codec = VLC_FOURCC('s','3','2','l');
- break;
- default:
- msg_Err( p_dec, "unknown raw audio sample size" );
- return VLC_EGENERIC;
- }
- break;
- }
- p_dec->p_sys = p_sys = malloc( sizeof( block_t ) );
- p_sys->p_block = NULL;
- return VLC_SUCCESS;
- }
- /*****************************************************************************
- * Close:
- *****************************************************************************/
- static void Close( vlc_object_t *p_this )
- {
- decoder_t *p_dec = (decoder_t*)p_this;
- if( p_dec->p_sys->p_block )
- {
- block_ChainRelease( p_dec->p_sys->p_block );
- }
- free( p_dec->p_sys );
- }
- /*****************************************************************************
- * Packetize: packetize an unit (here copy a complete block )
- *****************************************************************************/
- static block_t *Packetize ( decoder_t *p_dec, block_t **pp_block )
- {
- block_t *p_block;
- block_t *p_ret = p_dec->p_sys->p_block;
- if( pp_block == NULL || *pp_block == NULL )
- {
- return NULL;
- }
- p_block = *pp_block;
- *pp_block = NULL;
- if( p_block->i_dts <= 0 )
- {
- p_block->i_dts = p_block->i_pts;
- }
- if( p_block->i_dts <= 0 )
- {
- msg_Dbg( p_dec, "need dts > 0" );
- block_Release( p_block );
- return NULL;
- }
- if( p_ret != NULL && p_block->i_pts > p_ret->i_pts )
- {
- p_ret->i_length = p_block->i_pts - p_ret->i_pts;
- }
- p_dec->p_sys->p_block = p_block;
- return p_ret;
- }
- /*****************************************************************************
- * PacketizeSub: packetize an unit (here copy a complete block )
- *****************************************************************************/
- static block_t *PacketizeSub( decoder_t *p_dec, block_t **pp_block )
- {
- block_t *p_block;
- if( pp_block == NULL || *pp_block == NULL )
- {
- return NULL;
- }
- p_block = *pp_block;
- *pp_block = NULL;
- if( p_block->i_dts <= 0 )
- {
- p_block->i_dts = p_block->i_pts;
- }
- if( p_block->i_dts <= 0 )
- {
- msg_Dbg( p_dec, "need dts > 0" );
- block_Release( p_block );
- return NULL;
- }
- return p_block;
- }