/*****************************************************************************
* dec.c : audio output API towards decoders
*****************************************************************************
- * Copyright (C) 2002-2007 the VideoLAN team
+ * Copyright (C) 2002-2007 VLC authors and VideoLAN
* $Id$
*
* 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
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU Lesser General Public License as published by
+ * the Free Software Foundation; either version 2.1 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.
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU Lesser 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.
+ * You should have received a copy of the GNU Lesser 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.
*****************************************************************************/
/*****************************************************************************
#include <assert.h>
#include <vlc_common.h>
-
#include <vlc_aout.h>
#include <vlc_input.h>
+#include <vlc_atomic.h>
#include "aout_internal.h"
#include "libvlc.h"
const aout_request_vout_t *p_request_vout )
{
/* Sanitize audio format */
- if( p_format->i_channels > 32 )
- {
- msg_Err( p_aout, "too many audio channels (%u)",
- p_format->i_channels );
- return -1;
- }
- if( p_format->i_channels <= 0 )
- {
- msg_Err( p_aout, "no audio channels" );
- return -1;
- }
if( p_format->i_channels != aout_FormatNbChannels( p_format ) )
{
msg_Err( p_aout, "incompatible audio channels count with layout mask" );
return -1;
}
- aout_input_t *p_input = calloc( 1, sizeof(aout_input_t));
- if( !p_input )
- return -1;
-
- p_input->b_error = true;
-
- memcpy( &p_input->input, p_format,
- sizeof(audio_sample_format_t) );
- if( p_replay_gain )
- p_input->replay_gain = *p_replay_gain;
-
- /* We can only be called by the decoder, so no need to lock
- * p_input->lock. */
aout_owner_t *owner = aout_owner(p_aout);
+ int ret = 0;
+
+ /* TODO: reduce lock scope depending on decoder's real need */
aout_lock( p_aout );
- assert (owner->input == NULL);
- var_Destroy( p_aout, "audio-device" );
- var_Destroy( p_aout, "audio-channels" );
+ var_Destroy( p_aout, "stereo-mode" );
- /* Recreate the output using the new format. */
+ /* Create the audio output stream */
+ owner->input_format = *p_format;
+ vlc_atomic_set (&owner->restart, 0);
+ owner->volume = aout_volume_New (p_aout, p_replay_gain);
if( aout_OutputNew( p_aout, p_format ) < 0 )
goto error;
+ aout_volume_SetFormat (owner->volume, owner->mixer_format.i_format);
- assert (owner->volume.mixer == NULL);
- owner->volume.mixer = aout_MixerNew (p_aout, owner->mixer_format.i_format);
- if (owner->volume.mixer == NULL)
- {
- aout_OutputDelete( p_aout );
- goto error;
- }
+ /* Create the audio filtering "input" pipeline */
+ date_Init (&owner->sync.date, owner->mixer_format.i_rate, 1);
+ date_Set (&owner->sync.date, VLC_TS_INVALID);
- owner->input = p_input;
- aout_InputNew( p_aout, p_input, p_request_vout );
- aout_unlock( p_aout );
- return 0;
+ assert (owner->input == NULL);
+ owner->input = aout_InputNew (p_aout, p_format, &owner->mixer_format,
+ p_request_vout);
+ if (owner->input == NULL)
+ {
+ aout_OutputDelete (p_aout);
error:
+ aout_volume_Delete (owner->volume);
+ ret = -1;
+ }
aout_unlock( p_aout );
- free( p_input );
- return -1;
+ return ret;
}
-/*****************************************************************************
- * aout_DecDelete : delete a decoder
- *****************************************************************************/
-void aout_DecDelete( audio_output_t * p_aout )
+/**
+ * Stops all plugins involved in the audio output.
+ */
+void aout_DecDelete (audio_output_t *p_aout)
{
aout_owner_t *owner = aout_owner (p_aout);
aout_input_t *input;
- struct audio_mixer *mixer;
aout_lock( p_aout );
/* Remove the input. */
input = owner->input;
- aout_InputDelete (p_aout, input);
+ if (likely(input != NULL))
+ aout_InputDelete (p_aout, input);
owner->input = NULL;
aout_OutputDelete( p_aout );
- mixer = owner->volume.mixer;
- owner->volume.mixer = NULL;
- var_Destroy( p_aout, "audio-device" );
- var_Destroy( p_aout, "audio-channels" );
+ aout_volume_Delete (owner->volume);
- aout_unlock( p_aout );
+ var_Destroy( p_aout, "stereo-mode" );
- aout_MixerDelete (mixer);
+ aout_unlock( p_aout );
free (input);
}
+#define AOUT_RESTART_OUTPUT 1
+#define AOUT_RESTART_INPUT 2
static void aout_CheckRestart (audio_output_t *aout)
{
aout_owner_t *owner = aout_owner (aout);
- aout_input_t *input = owner->input;
aout_assert_locked (aout);
- if (likely(!owner->need_restart))
+ int restart = vlc_atomic_swap (&owner->restart, 0);
+ if (likely(restart == 0))
return;
- owner->need_restart = false;
- /* Reinitializes the output */
- aout_InputDelete (aout, owner->input);
- aout_MixerDelete (owner->volume.mixer);
- owner->volume.mixer = NULL;
- aout_OutputDelete (aout);
+ assert (restart & AOUT_RESTART_INPUT);
+
+ const aout_request_vout_t request_vout = owner->request_vout;
+
+ if (likely(owner->input != NULL))
+ aout_InputDelete (aout, owner->input);
+ owner->input = NULL;
- if (aout_OutputNew (aout, &input->input))
+ /* Reinitializes the output */
+ if (restart & AOUT_RESTART_OUTPUT)
{
-error:
- input->b_error = true;
- return; /* we are officially screwed */
+ aout_OutputDelete (aout);
+ if (aout_OutputNew (aout, &owner->input_format))
+ {
+ aout_volume_Delete (owner->volume);
+ return; /* we are officially screwed */
+ }
+ aout_volume_SetFormat (owner->volume, owner->mixer_format.i_format);
}
- owner->volume.mixer = aout_MixerNew (aout, owner->mixer_format.i_format);
- if (owner->volume.mixer == NULL)
+ owner->input = aout_InputNew (aout, &owner->input_format,
+ &owner->mixer_format, &request_vout);
+}
+
+/**
+ * Marks the audio output for restart, to update any parameter of the output
+ * plug-in (e.g. output device or channel mapping).
+ */
+static void aout_RequestRestart (audio_output_t *aout)
+{
+ aout_owner_t *owner = aout_owner (aout);
+
+ /* DO NOT remove AOUT_RESTART_INPUT. You need to change the atomic ops. */
+ vlc_atomic_set (&owner->restart, AOUT_RESTART_OUTPUT|AOUT_RESTART_INPUT);
+}
+
+int aout_ChannelsRestart (vlc_object_t *obj, const char *varname,
+ vlc_value_t oldval, vlc_value_t newval, void *data)
+{
+ audio_output_t *aout = (audio_output_t *)obj;
+ (void)oldval; (void)newval; (void)data;
+
+ if (!strcmp (varname, "audio-device"))
{
- aout_OutputDelete (aout);
- goto error;
+ /* This is supposed to be a significant change and supposes
+ * rebuilding the channel choices. */
+ var_Destroy (aout, "stereo-mode");
}
+ aout_RequestRestart (aout);
+ return 0;
+}
- if (aout_InputNew (aout, input, &input->request_vout))
- assert (input->b_error);
- else
- assert (!input->b_error);
+/**
+ * This function will safely mark aout input to be restarted as soon as
+ * possible to take configuration changes into account
+ */
+void aout_InputRequestRestart (audio_output_t *aout)
+{
+ aout_owner_t *owner = aout_owner (aout);
+
+ vlc_atomic_compare_swap (&owner->restart, 0, AOUT_RESTART_INPUT);
}
{
/* NOTE: the caller is responsible for serializing input change */
aout_owner_t *owner = aout_owner (aout);
- aout_input_t *input = owner->input;
- size_t length = samples * input->input.i_bytes_per_frame
- / input->input.i_frame_length;
+ size_t length = samples * owner->input_format.i_bytes_per_frame
+ / owner->input_format.i_frame_length;
block_t *block = block_Alloc( length );
if( likely(block != NULL) )
{
void aout_DecDeleteBuffer (audio_output_t *aout, block_t *block)
{
(void) aout;
- aout_BufferFree (block);
+ block_Release (block);
}
/*****************************************************************************
int aout_DecPlay (audio_output_t *p_aout, block_t *p_buffer, int i_input_rate)
{
aout_owner_t *owner = aout_owner (p_aout);
- aout_input_t *p_input = owner->input;
+ aout_input_t *input;
assert( i_input_rate >= INPUT_RATE_DEFAULT / AOUT_MAX_INPUT_RATE &&
i_input_rate <= INPUT_RATE_DEFAULT * AOUT_MAX_INPUT_RATE );
assert( p_buffer->i_pts > 0 );
p_buffer->i_length = (mtime_t)p_buffer->i_nb_samples * 1000000
- / p_input->input.i_rate;
+ / owner->input_format.i_rate;
aout_lock( p_aout );
- if( p_input->b_error )
+ aout_CheckRestart( p_aout );
+
+ input = owner->input;
+ if (unlikely(input == NULL)) /* can happen due to restart */
{
aout_unlock( p_aout );
- aout_BufferFree( p_buffer );
+ block_Release( p_buffer );
return -1;
}
- aout_CheckRestart( p_aout );
- aout_InputCheckAndRestart( p_aout, p_input );
-
/* Input */
- p_buffer = aout_InputPlay( p_aout, p_input, p_buffer, i_input_rate );
-
+ p_buffer = aout_InputPlay (p_aout, input, p_buffer, i_input_rate,
+ &owner->sync.date);
if( p_buffer != NULL )
{
+ date_Increment (&owner->sync.date, p_buffer->i_nb_samples);
+
/* Mixer */
- float amp = owner->volume.multiplier * p_input->multiplier;
- aout_MixerRun (owner->volume.mixer, p_buffer, amp);
+ aout_volume_Amplify (owner->volume, p_buffer);
/* Output */
aout_OutputPlay( p_aout, p_buffer );
int val;
aout_lock (aout);
- val = input->i_buffer_lost;
- input->i_buffer_lost = 0;
+ if (likely(input != NULL))
+ {
+ val = input->i_buffer_lost;
+ input->i_buffer_lost = 0;
+ }
+ else
+ val = 0; /* if aout_CheckRestart() failed */
aout_unlock (aout);
return val;
void aout_DecChangePause (audio_output_t *aout, bool paused, mtime_t date)
{
aout_owner_t *owner = aout_owner (aout);
- aout_input_t *p_input = owner->input;
aout_lock (aout);
-
- /* XXX: Should the input date be offset by the pause duration instead? */
- date_Set (&p_input->date, VLC_TS_INVALID);
+ /* XXX: Should the date be offset by the pause duration instead? */
+ date_Set (&owner->sync.date, VLC_TS_INVALID);
aout_OutputPause (aout, paused, date);
aout_unlock (aout);
}
void aout_DecFlush (audio_output_t *aout)
{
aout_owner_t *owner = aout_owner (aout);
- aout_input_t *input = owner->input;
aout_lock (aout);
- date_Set (&input->date, VLC_TS_INVALID);
+ date_Set (&owner->sync.date, VLC_TS_INVALID);
aout_OutputFlush (aout, false);
aout_unlock (aout);
}
bool aout_DecIsEmpty (audio_output_t *aout)
{
aout_owner_t *owner = aout_owner (aout);
- aout_input_t *input = owner->input;
- mtime_t end_date;
+ mtime_t end_date, now = mdate ();
+ bool empty;
aout_lock (aout);
- /* FIXME: tell output to drain */
- end_date = date_Get (&input->date);
+ end_date = date_Get (&owner->sync.date);
+ empty = end_date == VLC_TS_INVALID || end_date <= now;
+ if (empty)
+ /* The last PTS has elapsed already. So the underlying audio output
+ * buffer should be empty or almost. Thus draining should be fast
+ * and will not block the caller too long. */
+ aout_OutputFlush (aout, true);
aout_unlock (aout);
- return end_date == VLC_TS_INVALID || end_date <= mdate();
+ return empty;
}
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