/*****************************************************************************
* mixer.c : audio output mixing operations
*****************************************************************************
- * Copyright (C) 2002 VideoLAN
- * $Id: mixer.c,v 1.8 2002/08/19 23:12:57 massiot Exp $
+ * Copyright (C) 2002-2004 the VideoLAN team
+ * $Id$
*
* Authors: Christophe Massiot <massiot@via.ecp.fr>
*
* 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
*
* 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.
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
*****************************************************************************/
/*****************************************************************************
* Preamble
*****************************************************************************/
-#include <stdlib.h> /* calloc(), malloc(), free() */
-#include <string.h>
-
-#include <vlc/vlc.h>
-
-#ifdef HAVE_ALLOCA_H
-# include <alloca.h>
+#ifdef HAVE_CONFIG_H
+# include "config.h"
#endif
-#include "audio_output.h"
+#include <stddef.h>
+#include <math.h>
+
+#include <vlc_common.h>
+#include <libvlc.h>
+#include <vlc_modules.h>
+#include <vlc_aout.h>
+#include <vlc_aout_mixer.h>
#include "aout_internal.h"
-/*****************************************************************************
- * aout_MixerNew: prepare a mixer plug-in
- *****************************************************************************/
-int aout_MixerNew( aout_instance_t * p_aout )
+#undef aout_MixerNew
+/**
+ * Creates a software amplifier.
+ */
+audio_mixer_t *aout_MixerNew(vlc_object_t *obj, vlc_fourcc_t format)
{
- p_aout->mixer.p_module = module_Need( p_aout, "audio mixer", NULL );
- if ( p_aout->mixer.p_module == NULL )
+ audio_mixer_t *mixer = vlc_custom_create(obj, sizeof (*mixer), "mixer");
+ if (unlikely(mixer == NULL))
+ return NULL;
+
+ mixer->format = format;
+ mixer->mix = NULL;
+ mixer->module = module_need(mixer, "audio mixer", NULL, false);
+ if (mixer->module == NULL)
{
- msg_Err( p_aout, "no suitable aout mixer" );
- return -1;
+ vlc_object_release(mixer);
+ mixer = NULL;
}
- return 0;
+ return mixer;
}
-/*****************************************************************************
- * aout_MixerDelete: delete the mixer
- *****************************************************************************/
-void aout_MixerDelete( aout_instance_t * p_aout )
+/**
+ * Destroys a software amplifier.
+ */
+void aout_MixerDelete(audio_mixer_t *mixer)
{
- module_Unneed( p_aout, p_aout->mixer.p_module );
+ if (mixer == NULL)
+ return;
+
+ module_unneed(mixer, mixer->module);
+ vlc_object_release(mixer);
}
-/*****************************************************************************
- * MixBuffer: try to prepare one output buffer
- *****************************************************************************/
-static int MixBuffer( aout_instance_t * p_aout )
+/**
+ * Applies replay gain and software volume to an audio buffer.
+ */
+void aout_MixerRun(audio_mixer_t *mixer, block_t *block, float amp)
{
- int i;
- aout_buffer_t * p_output_buffer;
- mtime_t start_date, end_date;
-
- /* Retrieve the date of the next buffer. */
- vlc_mutex_lock( &p_aout->mixer_lock );
- start_date = aout_FifoNextStart( p_aout, &p_aout->output.fifo );
- if ( start_date != 0 && start_date < mdate() )
- {
- /* The output is _very_ late. This can only happen if the user
- * pauses the stream (or if the decoder is buggy, which cannot
- * happen :). */
- msg_Warn( p_aout, "Output PTS is out of range (%lld), clearing out",
- start_date );
- start_date = p_aout->output.fifo.end_date = 0;
- }
-
- /* See if we have enough data to prepare a new buffer for the audio
- * output. First : start date. */
- if ( !start_date )
- {
- /* Find the latest start date available. */
- for ( i = 0; i < p_aout->i_nb_inputs; i++ )
- {
- aout_input_t * p_input = p_aout->pp_inputs[i];
- aout_fifo_t * p_fifo = &p_input->fifo;
- aout_buffer_t * p_buffer;
-
- p_buffer = p_fifo->p_first;
- if ( p_buffer == NULL )
- {
- break;
- }
-
- if ( !start_date || start_date < p_buffer->start_date )
- {
- start_date = p_buffer->start_date;
- }
- }
-
- if ( i < p_aout->i_nb_inputs )
- {
- /* Interrupted before the end... We can't run. */
- vlc_mutex_unlock( &p_aout->mixer_lock );
- return -1;
- }
- }
- end_date = start_date + (mtime_t)p_aout->output.i_nb_samples * 1000000
- / p_aout->output.output.i_rate;
-
- /* Check that start_date and end_date are available for all input
- * streams. */
- for ( i = 0; i < p_aout->i_nb_inputs; i++ )
- {
- aout_input_t * p_input = p_aout->pp_inputs[i];
- aout_fifo_t * p_fifo = &p_input->fifo;
- aout_buffer_t * p_buffer;
- mtime_t prev_date;
- vlc_bool_t b_drop_buffers;
-
- p_buffer = p_fifo->p_first;
- if ( p_buffer == NULL )
- {
- break;
- }
-
- /* Check for the continuity of start_date */
- while ( p_buffer != NULL && p_buffer->end_date < start_date )
- {
- aout_buffer_t * p_next = p_buffer->p_next;
- msg_Err( p_aout, "the mixer got a packet in the past (%lld)",
- start_date - p_buffer->end_date );
- aout_BufferFree( p_buffer );
- p_fifo->p_first = p_buffer = p_next;
- p_input->p_first_byte_to_mix = NULL;
- }
- if ( p_buffer == NULL )
- {
- p_fifo->pp_last = &p_fifo->p_first;
- break;
- }
-
- if ( !AOUT_FMT_NON_LINEAR( &p_aout->mixer.mixer ) )
- {
- /* Additionally check that p_first_byte_to_mix is well
- * located. */
- unsigned long i_nb_bytes = (start_date - p_buffer->start_date)
- * p_aout->mixer.mixer.i_bytes_per_frame
- * p_aout->mixer.mixer.i_rate
- / p_aout->mixer.mixer.i_frame_length
- / 1000000;
- ptrdiff_t mixer_nb_bytes;
-
- if ( p_input->p_first_byte_to_mix == NULL )
- {
- p_input->p_first_byte_to_mix = p_buffer->p_buffer;
- }
- mixer_nb_bytes = p_input->p_first_byte_to_mix
- - p_buffer->p_buffer;
-
- if ( i_nb_bytes + p_aout->mixer.mixer.i_bytes_per_frame
- < mixer_nb_bytes ||
- i_nb_bytes - p_aout->mixer.mixer.i_bytes_per_frame
- > mixer_nb_bytes )
- {
- msg_Warn( p_aout,
- "mixer start isn't output start (%ld)",
- i_nb_bytes - mixer_nb_bytes );
-
- /* Round to the nearest multiple */
- i_nb_bytes /= p_aout->mixer.mixer.i_bytes_per_frame;
- i_nb_bytes *= p_aout->mixer.mixer.i_bytes_per_frame;
- p_input->p_first_byte_to_mix = p_buffer->p_buffer
- + i_nb_bytes;
- }
- }
+ mixer->mix(mixer, block, amp);
+}
- /* Check that we have enough samples. */
- for ( ; ; )
+/*** Replay gain ***/
+float (aout_ReplayGainSelect)(vlc_object_t *obj, const char *str,
+ const audio_replay_gain_t *replay_gain)
+{
+ float gain = 0.;
+ unsigned mode = AUDIO_REPLAY_GAIN_MAX;
+
+ if (likely(str != NULL))
+ { /* Find selectrf mode */
+ if (!strcmp (str, "track"))
+ mode = AUDIO_REPLAY_GAIN_TRACK;
+ else
+ if (!strcmp (str, "album"))
+ mode = AUDIO_REPLAY_GAIN_ALBUM;
+
+ /* If the selectrf mode is not available, prefer the other one */
+ if (mode != AUDIO_REPLAY_GAIN_MAX && !replay_gain->pb_gain[mode])
{
- p_buffer = p_fifo->p_first;
- if ( p_buffer == NULL ) break;
- if ( p_buffer->end_date >= end_date ) break;
-
- /* Check that all buffers are contiguous. */
- prev_date = p_fifo->p_first->end_date;
- p_buffer = p_buffer->p_next;
- b_drop_buffers = 0;
- for ( ; p_buffer != NULL; p_buffer = p_buffer->p_next )
- {
- if ( prev_date != p_buffer->start_date )
- {
- msg_Warn( p_aout,
- "buffer hole, dropping packets (%lld)",
- p_buffer->start_date - prev_date );
- b_drop_buffers = 1;
- break;
- }
- if ( p_buffer->end_date >= end_date ) break;
- prev_date = p_buffer->end_date;
- }
- if ( b_drop_buffers )
- {
- aout_buffer_t * p_deleted = p_fifo->p_first;
- while ( p_deleted != NULL && p_deleted != p_buffer )
- {
- aout_buffer_t * p_next = p_deleted->p_next;
- aout_BufferFree( p_deleted );
- p_deleted = p_next;
- }
- p_fifo->p_first = p_deleted; /* == p_buffer */
- }
- else break;
+ if (replay_gain->pb_gain[!mode])
+ mode = !mode;
}
- if ( p_buffer == NULL ) break;
}
- if ( i < p_aout->i_nb_inputs )
- {
- /* Interrupted before the end... We can't run. */
- vlc_mutex_unlock( &p_aout->mixer_lock );
- return -1;
- }
+ /* */
+ if (mode == AUDIO_REPLAY_GAIN_MAX)
+ return 1.;
- /* Run the mixer. */
- aout_BufferAlloc( &p_aout->mixer.output_alloc,
- ((u64)p_aout->output.i_nb_samples * 1000000)
- / p_aout->output.output.i_rate,
- /* This is a bit kludgy, but is actually only used
- * for the S/PDIF dummy mixer : */
- p_aout->pp_inputs[0]->fifo.p_first,
- p_output_buffer );
- if ( p_output_buffer == NULL )
- {
- msg_Err( p_aout, "out of memory" );
- vlc_mutex_unlock( &p_aout->mixer_lock );
- return -1;
- }
- p_output_buffer->i_nb_samples = p_aout->output.i_nb_samples;
- p_output_buffer->i_nb_bytes = p_aout->output.i_nb_samples
- * p_aout->mixer.mixer.i_bytes_per_frame
- / p_aout->mixer.mixer.i_frame_length;
- p_output_buffer->start_date = start_date;
- p_output_buffer->end_date = end_date;
+ if (replay_gain->pb_gain[mode])
+ gain = replay_gain->pf_gain[mode]
+ + var_InheritFloat (obj, "audio-replay-gain-preamp");
+ else
+ gain = var_InheritFloat (obj, "audio-replay-gain-default");
- p_aout->mixer.pf_do_work( p_aout, p_output_buffer );
+ float multiplier = pow (10., gain / 20.);
- vlc_mutex_unlock( &p_aout->mixer_lock );
+ if (replay_gain->pb_peak[mode]
+ && var_InheritBool (obj, "audio-replay-gain-peak-protection")
+ && replay_gain->pf_peak[mode] * multiplier > 1.0)
+ multiplier = 1.0f / replay_gain->pf_peak[mode];
- aout_OutputPlay( p_aout, p_output_buffer );
-
- return 0;
-}
-
-/*****************************************************************************
- * aout_MixerRun: entry point for the mixer & post-filters processing
- *****************************************************************************/
-void aout_MixerRun( aout_instance_t * p_aout )
-{
- while( MixBuffer( p_aout ) != -1 );
+ return multiplier;
}
projects / vlc / blobdiff