aout.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:3k
源码类别:
midi
开发平台:
Unix_Linux
- /*****************************************************************************
- * aout_dummy.c : dummy audio output plugin
- *****************************************************************************
- * Copyright (C) 2002 the VideoLAN team
- * $Id: e1e64ff23db1fcc612b05a001b8ff97c0096fc5d $
- *
- * Authors: Christophe Massiot <massiot@via.ecp.fr>
- *
- * 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_aout.h>
- #include "dummy.h"
- #define FRAME_SIZE 2048
- #define A52_FRAME_NB 1536
- /*****************************************************************************
- * Local prototypes.
- *****************************************************************************/
- static void Play ( aout_instance_t * );
- /*****************************************************************************
- * OpenAudio: open a dummy audio device
- *****************************************************************************/
- int OpenAudio ( vlc_object_t * p_this )
- {
- aout_instance_t * p_aout = (aout_instance_t *)p_this;
- p_aout->output.pf_play = Play;
- aout_VolumeSoftInit( p_aout );
- if ( p_aout->output.output.i_format == VLC_FOURCC('s','p','d','i') )
- {
- p_aout->output.i_nb_samples = A52_FRAME_NB;
- p_aout->output.output.i_bytes_per_frame = AOUT_SPDIF_SIZE;
- p_aout->output.output.i_frame_length = A52_FRAME_NB;
- }
- else
- {
- p_aout->output.i_nb_samples = FRAME_SIZE;
- }
- /* Create the variable for the audio-device */
- var_Create( p_aout, "audio-device", VLC_VAR_INTEGER | VLC_VAR_HASCHOICE );
- return VLC_SUCCESS;
- }
- /*****************************************************************************
- * Play: pretend to play a sound
- *****************************************************************************/
- static void Play( aout_instance_t * p_aout )
- {
- aout_buffer_t * p_buffer = aout_FifoPop( p_aout, &p_aout->output.fifo );
- aout_BufferFree( p_buffer );
- }