+++ /dev/null
-/*****************************************************************************
- * aout_esd.c : Esound functions library
- *****************************************************************************
- * Copyright (C) 2000-2001 VideoLAN
- * $Id: aout_esd.c,v 1.21 2002/02/24 22:06:50 sam Exp $
- *
- * 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., 59 Temple Place - Suite 330, Boston, MA 02111, USA.
- *****************************************************************************/
-
-/* TODO:
- *
- * - use the libesd function to get latency when it's not buggy anymore
- *
- */
-
-/*****************************************************************************
- * Preamble
- *****************************************************************************/
-#include <errno.h> /* ENOMEM */
-#include <fcntl.h> /* open(), O_WRONLY */
-#include <string.h> /* strerror() */
-#include <unistd.h> /* write(), close() */
-#include <stdio.h> /* "intf_msg.h" */
-#include <stdlib.h> /* calloc(), malloc(), free() */
-
-#include <esd.h>
-
-#include <videolan/vlc.h>
-
-#include "audio_output.h" /* aout_thread_t */
-
-/*****************************************************************************
- * aout_sys_t: esd audio output method descriptor
- *****************************************************************************
- * This structure is part of the audio output thread descriptor.
- * It describes some esd specific variables.
- *****************************************************************************/
-typedef struct aout_sys_s
-{
- esd_format_t esd_format;
- int i_fd;
-
-} aout_sys_t;
-
-/*****************************************************************************
- * Local prototypes.
- *****************************************************************************/
-static int aout_Open ( aout_thread_t *p_aout );
-static int aout_SetFormat ( aout_thread_t *p_aout );
-static int aout_GetBufInfo ( aout_thread_t *p_aout, int i_buffer_info );
-static void aout_Play ( aout_thread_t *p_aout,
- byte_t *buffer, int i_size );
-static void aout_Close ( aout_thread_t *p_aout );
-
-/*****************************************************************************
- * Functions exported as capabilities. They are declared as static so that
- * we don't pollute the namespace too much.
- *****************************************************************************/
-void _M( aout_getfunctions )( function_list_t * p_function_list )
-{
- p_function_list->functions.aout.pf_open = aout_Open;
- p_function_list->functions.aout.pf_setformat = aout_SetFormat;
- p_function_list->functions.aout.pf_getbufinfo = aout_GetBufInfo;
- p_function_list->functions.aout.pf_play = aout_Play;
- p_function_list->functions.aout.pf_close = aout_Close;
-}
-
-/*****************************************************************************
- * aout_Open: open an esd socket
- *****************************************************************************/
-static int aout_Open( aout_thread_t *p_aout )
-{
- /* mpg123 does it this way */
- int i_bits = ESD_BITS16;
- int i_mode = ESD_STREAM;
- int i_func = ESD_PLAY;
-
- /* Allocate structure */
- p_aout->p_sys = malloc( sizeof( aout_sys_t ) );
- if( p_aout->p_sys == NULL )
- {
- intf_ErrMsg("error: %s", strerror(ENOMEM) );
- return( 1 );
- }
-
- /* Initialize some variables */
- p_aout->i_rate = esd_audio_rate; /* We use actual esd rate value, not
- * initial value */
-
- i_bits = ESD_BITS16;
- i_mode = ESD_STREAM;
- i_func = ESD_PLAY;
- p_aout->p_sys->esd_format = (i_bits | i_mode | i_func) & (~ESD_MASK_CHAN);
-
- if( p_aout->i_channels == 1 )
- {
- p_aout->p_sys->esd_format |= ESD_MONO;
- }
- else
- {
- p_aout->p_sys->esd_format |= ESD_STEREO;
- }
-
- /* open a socket for playing a stream
- * and try to open /dev/dsp if there's no EsounD */
- if ( (p_aout->p_sys->i_fd
- = esd_play_stream_fallback(p_aout->p_sys->esd_format,
- p_aout->i_rate, NULL, "vlc")) < 0 )
- {
- intf_ErrMsg( "aout error: can't open esound socket"
- " (format 0x%08x at %ld Hz)",
- p_aout->p_sys->esd_format, p_aout->i_rate );
- return( -1 );
- }
-
- return( 0 );
-}
-
-/*****************************************************************************
- * aout_SetFormat: set the output format
- *****************************************************************************/
-static int aout_SetFormat( aout_thread_t *p_aout )
-{
- int i_fd;
-
- i_fd = esd_open_sound(NULL);
- p_aout->i_latency = esd_get_latency(i_fd);
-
- intf_WarnMsg(2, "aout_esd_latency: %d",p_aout->i_latency);
-
- return( 0 );
-}
-
-/*****************************************************************************
- * aout_GetBufInfo: buffer status query
- *****************************************************************************/
-static int aout_GetBufInfo( aout_thread_t *p_aout, int i_buffer_limit )
-{
- /* arbitrary value that should be changed */
- return( i_buffer_limit );
-}
-
-/*****************************************************************************
- * aout_Play: play a sound samples buffer
- *****************************************************************************
- * This function writes a buffer of i_length bytes in the socket
- *****************************************************************************/
-static void aout_Play( aout_thread_t *p_aout, byte_t *buffer, int i_size )
-{
- int i_amount;
-
- if (p_aout->p_sys->esd_format & ESD_STEREO)
- {
- if (p_aout->p_sys->esd_format & ESD_BITS16)
- {
- i_amount = (44100 * (ESD_BUF_SIZE + 64)) / p_aout->i_rate;
- }
- else
- {
- i_amount = (44100 * (ESD_BUF_SIZE + 128)) / p_aout->i_rate;
- }
- }
- else
- {
- if (p_aout->p_sys->esd_format & ESD_BITS16)
- {
- i_amount = (2 * 44100 * (ESD_BUF_SIZE + 128)) / p_aout->i_rate;
- }
- else
- {
- i_amount = (2 * 44100 * (ESD_BUF_SIZE + 256)) / p_aout->i_rate;
- }
- }
-
- write( p_aout->p_sys->i_fd, buffer, i_size );
-}
-
-/*****************************************************************************
- * aout_Close: close the Esound socket
- *****************************************************************************/
-static void aout_Close( aout_thread_t *p_aout )
-{
- close( p_aout->p_sys->i_fd );
-}
-
projects / vlc / blobdiff