decoder.c
资源名称:vlc-1.0.5.zip [点击查看]
上传用户:kjfoods
上传日期:2020-07-06
资源大小:29949k
文件大小:5k
源码类别:
midi
开发平台:
Unix_Linux
- /*****************************************************************************
- * decoder.c: dummy decoder plugin for vlc.
- *****************************************************************************
- * Copyright (C) 2002 the VideoLAN team
- * $Id: ad1abaa4beaac6c3fee452f3fc9df90c91a49eed $
- *
- * Authors: Samuel Hocevar <sam@zoy.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., 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_codec.h>
- #ifdef HAVE_UNISTD_H
- # include <unistd.h> /* write(), close() */
- #elif defined( WIN32 ) && !defined( UNDER_CE )
- # include <io.h>
- #endif
- #ifdef HAVE_SYS_TYPES_H
- # include <sys/types.h> /* open() */
- #endif
- #ifdef HAVE_SYS_STAT_H
- # include <sys/stat.h>
- #endif
- #ifdef HAVE_FCNTL_H
- # include <fcntl.h>
- #endif
- #include <limits.h> /* PATH_MAX */
- #include "dummy.h"
- /*****************************************************************************
- * decoder_sys_t : theora decoder descriptor
- *****************************************************************************/
- struct decoder_sys_t
- {
- int i_fd;
- };
- /*****************************************************************************
- * Local prototypes
- *****************************************************************************/
- static void *DecodeBlock( decoder_t *p_dec, block_t **pp_block );
- /*****************************************************************************
- * OpenDecoder: Open the decoder
- *****************************************************************************/
- static int OpenDecoderCommon( vlc_object_t *p_this, bool b_force_dump )
- {
- decoder_t *p_dec = (decoder_t*)p_this;
- decoder_sys_t *p_sys;
- char psz_file[ PATH_MAX ];
- vlc_value_t val;
- /* 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;
- }
- snprintf( psz_file, sizeof( psz_file), "stream.%p", p_dec );
- #ifndef UNDER_CE
- if( !b_force_dump )
- {
- var_Create( p_dec, "dummy-save-es", VLC_VAR_BOOL | VLC_VAR_DOINHERIT );
- var_Get( p_dec, "dummy-save-es", &val );
- b_force_dump = val.b_bool;
- }
- if( b_force_dump )
- {
- p_sys->i_fd = open( psz_file, O_WRONLY | O_CREAT | O_TRUNC, 00644 );
- if( p_sys->i_fd == -1 )
- {
- msg_Err( p_dec, "cannot create `%s'", psz_file );
- free( p_sys );
- return VLC_EGENERIC;
- }
- msg_Dbg( p_dec, "dumping stream to file `%s'", psz_file );
- }
- else
- #endif
- {
- p_sys->i_fd = -1;
- }
- /* Set callbacks */
- p_dec->pf_decode_video = (picture_t *(*)(decoder_t *, block_t **))
- DecodeBlock;
- p_dec->pf_decode_audio = (aout_buffer_t *(*)(decoder_t *, block_t **))
- DecodeBlock;
- p_dec->pf_decode_sub = (subpicture_t *(*)(decoder_t *, block_t **))
- DecodeBlock;
- es_format_Copy( &p_dec->fmt_out, &p_dec->fmt_in );
- return VLC_SUCCESS;
- }
- int OpenDecoder( vlc_object_t *p_this )
- {
- return OpenDecoderCommon( p_this, false );
- }
- int OpenDecoderDump( vlc_object_t *p_this )
- {
- return OpenDecoderCommon( p_this, true );
- }
- /****************************************************************************
- * RunDecoder: the whole thing
- ****************************************************************************
- * This function must be fed with ogg packets.
- ****************************************************************************/
- static void *DecodeBlock( decoder_t *p_dec, block_t **pp_block )
- {
- decoder_sys_t *p_sys = p_dec->p_sys;
- block_t *p_block;
- if( !pp_block || !*pp_block ) return NULL;
- p_block = *pp_block;
- if( p_sys->i_fd >= 0 &&
- p_block->i_buffer > 0 &&
- (p_block->i_flags & (BLOCK_FLAG_DISCONTINUITY|BLOCK_FLAG_CORRUPTED) ) == 0 )
- {
- #ifndef UNDER_CE
- write( p_sys->i_fd, p_block->p_buffer, p_block->i_buffer );
- #endif
- msg_Dbg( p_dec, "dumped %zu bytes", p_block->i_buffer );
- }
- block_Release( p_block );
- return NULL;
- }
- /*****************************************************************************
- * CloseDecoder: decoder destruction
- *****************************************************************************/
- void CloseDecoder ( vlc_object_t *p_this )
- {
- decoder_t *p_dec = (decoder_t *)p_this;
- decoder_sys_t *p_sys = p_dec->p_sys;
- #ifndef UNDER_CE
- if( p_sys->i_fd >= 0 )
- close( p_sys->i_fd );
- #endif
- free( p_sys );
- }