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Commit d81ece46 authored by Arnaud de Bossoreille de Ribou's avatar Arnaud de Bossoreille de Ribou
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Up-to-date ALSA audio output module.

parent 3820b435
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Showing with 57 additions and 38 deletions
modules/audio_output/alsa.c
View file @ d81ece46
......@@ -2,7 +2,7 @@
* alsa.c : alsa plugin for vlc
*****************************************************************************
* Copyright (C) 2000-2001 VideoLAN
* $Id: alsa.c,v 1.12 2002/09/30 21:32:32 massiot Exp $
* $Id: alsa.c,v 1.13 2002/10/05 03:44:50 bozo Exp $
*
* Authors: Henri Fallon <henri@videolan.org> - Original Author
* Jeffrey Baker <jwbaker@acm.org> - Port to ALSA 1.0 API
......@@ -100,12 +100,15 @@ static int Open( vlc_object_t *p_this )
aout_instance_t * p_aout = (aout_instance_t *)p_this;
struct aout_sys_t * p_sys;
int i_snd_rc;
int i_snd_rc = -1;
char * psz_device;
char * psz_device = NULL;
char psz_alsadev[128];
char * psz_userdev;
int i_format_tries[2];
int i_tries_count, i;
int i_format;
int i_channels;
......@@ -126,44 +129,54 @@ static int Open( vlc_object_t *p_this )
snd_output_stdio_attach( &p_sys->p_snd_stderr, stderr, 0 );
#endif
i_tries_count = 0;
i_format_tries[i_tries_count++] = p_aout->output.output.i_format;
if( i_format_tries[0] == VLC_FOURCC('s','p','d','i') )
{
/* Try S/PDIF, and then FLOAT32 */
i_format_tries[i_tries_count++] = VLC_FOURCC('f','l','3','2');
}
/* Read in ALSA device preferences from configuration */
psz_userdev = config_GetPsz( p_aout, "alsa-device" );
if( psz_userdev )
for( i = 0 ; ( i_snd_rc < 0 ) && ( i < i_tries_count ) ; ++i )
{
psz_device = psz_userdev;
}
else
{
/* Use the internal logic to decide on the device name */
if ( p_aout->output.output.i_format == VLC_FOURCC('s','p','d','i') )
if( i_format_tries[i] == VLC_FOURCC('s','p','d','i') )
{
/* Will probably need some little modification in the case
we want to send some data at a different rate
(32000, 44100 and 48000 are the possibilities) -- bozo */
unsigned char s[4];
s[0] = IEC958_AES0_CON_EMPHASIS_NONE | IEC958_AES0_NONAUDIO;
s[1] = IEC958_AES1_CON_ORIGINAL | IEC958_AES1_CON_PCM_CODER;
s[2] = 0;
s[3] = IEC958_AES3_CON_FS_48000;
sprintf( psz_alsadev,
"iec958:AES0=0x%x,AES1=0x%x,AES2=0x%x,AES3=0x%x",
s[0], s[1], s[2], s[3] );
psz_device = psz_alsadev;
aout_VolumeNoneInit( p_aout );
if( psz_userdev )
{
psz_device = psz_userdev;
}
else
{
/* Will probably need some little modification in the case
we want to send some data at a different rate
(32000, 44100 and 48000 are the possibilities) -- bozo */
unsigned char s[4];
s[0] = IEC958_AES0_CON_EMPHASIS_NONE | IEC958_AES0_NONAUDIO;
s[1] = IEC958_AES1_CON_ORIGINAL | IEC958_AES1_CON_PCM_CODER;
s[2] = 0;
s[3] = IEC958_AES3_CON_FS_48000;
sprintf( psz_alsadev,
"iec958:AES0=0x%x,AES1=0x%x,AES2=0x%x,AES3=0x%x",
s[0], s[1], s[2], s[3] );
psz_device = psz_alsadev;
}
}
else
{
psz_device = "default";
aout_VolumeSoftInit( p_aout );
if( psz_userdev )
psz_device = psz_userdev;
else
psz_device = "default";
}
/* Open device */
i_snd_rc = snd_pcm_open( &p_sys->p_snd_pcm, psz_device,
SND_PCM_STREAM_PLAYBACK, SND_PCM_NONBLOCK);
}
/* Open device */
i_snd_rc = snd_pcm_open( &p_sys->p_snd_pcm, psz_device,
SND_PCM_STREAM_PLAYBACK, SND_PCM_NONBLOCK);
if( i_snd_rc < 0 )
{
msg_Err( p_aout, "cannot open ALSA device `%s' (%s)",
......@@ -177,6 +190,8 @@ static int Open( vlc_object_t *p_this )
if( psz_userdev )
free( psz_userdev );
p_aout->output.output.i_format = i_format_tries[i - 1];
/* Default settings */
p_sys->b_can_sleek = VLC_FALSE;
i_channels = p_aout->output.output.i_channels;
......@@ -184,14 +199,15 @@ static int Open( vlc_object_t *p_this )
{
p_sys->i_buffer_size = ALSA_SPDIF_BUFFER_SIZE;
p_aout->output.i_nb_samples = ALSA_SPDIF_PERIOD_SIZE;
aout_VolumeNoneInit( p_aout );
}
else
{
p_sys->i_buffer_size = ALSA_DEFAULT_BUFFER_SIZE;
p_aout->output.i_nb_samples = ALSA_DEFAULT_PERIOD_SIZE;
aout_VolumeSoftInit( p_aout );
}
/* Compute the settings */
switch (p_aout->output.output.i_format)
{
......@@ -208,8 +224,8 @@ static int Open( vlc_object_t *p_this )
p_aout->output.output.i_frame_length = ALSA_SPDIF_PERIOD_SIZE;
break;
default:
msg_Err( p_aout, "audio output format 0x%x not supported",
p_aout->output.output.i_format );
msg_Err( p_aout, "audio output format '%.4s' not supported",
&p_aout->output.output.i_format );
return -1;
break;
}
......@@ -247,13 +263,15 @@ static int Open( vlc_object_t *p_this )
return -1;
}
i_snd_rc = snd_pcm_hw_params_set_rate( p_sys->p_snd_pcm, p_hw,
p_aout->output.output.i_rate, 0 );
i_snd_rc = snd_pcm_hw_params_set_rate_near( p_sys->p_snd_pcm, p_hw,
p_aout->output.output.i_rate,
NULL );
if( i_snd_rc < 0 )
{
msg_Err( p_aout, "unable to set sample rate" );
return -1;
}
p_aout->output.output.i_rate = i_snd_rc;
i_snd_rc = snd_pcm_hw_params_set_buffer_size_near( p_sys->p_snd_pcm, p_hw,
p_sys->i_buffer_size );
......@@ -265,14 +283,13 @@ static int Open( vlc_object_t *p_this )
p_sys->i_buffer_size = i_snd_rc;
i_snd_rc = snd_pcm_hw_params_set_period_size_near(
p_sys->p_snd_pcm, p_hw, p_aout->output.i_nb_samples, 0 );
p_sys->p_snd_pcm, p_hw, p_aout->output.i_nb_samples, NULL );
if( i_snd_rc < 0 )
{
msg_Err( p_aout, "unable to set period size" );
return -1;
}
p_aout->output.i_nb_samples = i_snd_rc;
p_sys->i_period_time = snd_pcm_hw_params_get_period_time( p_hw, 0 );
i_snd_rc = snd_pcm_hw_params( p_sys->p_snd_pcm, p_hw );
if (i_snd_rc < 0)
......@@ -281,6 +298,8 @@ static int Open( vlc_object_t *p_this )
return -1;
}
p_sys->i_period_time = snd_pcm_hw_params_get_period_time( p_hw, NULL );
snd_pcm_sw_params_current( p_sys->p_snd_pcm, p_sw );
i_snd_rc = snd_pcm_sw_params_set_sleep_min( p_sys->p_snd_pcm, p_sw, 0 );
......@@ -455,7 +474,7 @@ static void ALSAFill( aout_instance_t * p_aout )
return;
i_snd_rc = snd_pcm_writei( p_sys->p_snd_pcm, p_buffer->p_buffer,
p_buffer->i_nb_samples );
p_buffer->i_nb_bytes );
if( i_snd_rc < 0 )
{
......
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