X-Git-Url: https://git.sesse.net/?a=blobdiff_plain;f=src%2Faudio_output%2Fmixer.c;h=8b1fd3acdb82109b28c15f556525ac7d73d960f3;hb=470ce70b69e1530173950a8dfd6d274a70caa7bc;hp=040c7d62548417f95b571056436fd0e2cde24ff7;hpb=8d5c85f26f79ef0853bb5f23ff33809a8999716c;p=vlc diff --git a/src/audio_output/mixer.c b/src/audio_output/mixer.c index 040c7d6254..8b1fd3acdb 100644 --- a/src/audio_output/mixer.c +++ b/src/audio_output/mixer.c @@ -1,8 +1,8 @@ /***************************************************************************** * mixer.c : audio output mixing operations ***************************************************************************** - * Copyright (C) 2002 VideoLAN - * $Id: mixer.c,v 1.3 2002/08/12 22:12:51 massiot Exp $ + * Copyright (C) 2002-2004 the VideoLAN team + * $Id$ * * Authors: Christophe Massiot * @@ -10,7 +10,7 @@ * 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 @@ -18,116 +18,396 @@ * * 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 /* calloc(), malloc(), free() */ -#include - -#include - -#ifdef HAVE_ALLOCA_H -# include +#ifdef HAVE_CONFIG_H +# include "config.h" #endif +#include -#include "audio_output.h" -#include "aout_internal.h" +#include +#include +#include +#include +#include +#include "aout_internal.h" /***************************************************************************** * aout_MixerNew: prepare a mixer plug-in + ***************************************************************************** + * Please note that you must hold the mixer lock. *****************************************************************************/ int aout_MixerNew( aout_instance_t * p_aout ) { - p_aout->mixer.p_module = module_Need( p_aout, "audio mixer", NULL ); - if ( p_aout->mixer.p_module == NULL ) + assert( !p_aout->p_mixer ); + vlc_assert_locked( &p_aout->input_fifos_lock ); + + aout_mixer_t *p_mixer = vlc_object_create( p_aout, sizeof(*p_mixer) ); + if( !p_mixer ) + return VLC_EGENERIC; + + p_mixer->fmt = p_aout->mixer_format; + p_mixer->allocation = p_aout->mixer_allocation; + p_mixer->multiplier = p_aout->mixer_multiplier; + p_mixer->input_count = p_aout->i_nb_inputs; + p_mixer->input = calloc( p_mixer->input_count, sizeof(*p_mixer->input) ); + for( int i = 0; i < p_aout->i_nb_inputs; i++ ) + p_mixer->input[i] = &p_aout->pp_inputs[i]->mixer; + p_mixer->mix = NULL; + p_mixer->sys = NULL; + + vlc_object_attach( p_mixer, p_aout ); + + p_mixer->module = module_need( p_mixer, "audio mixer", NULL, false ); + if( !p_mixer->module ) { - msg_Err( p_aout, "no suitable aout mixer" ); - return -1; + msg_Err( p_aout, "no suitable audio mixer" ); + free( p_mixer->input ); + vlc_object_release( p_mixer ); + return VLC_EGENERIC; } - return 0; + + /* */ + p_aout->p_mixer = p_mixer; + return VLC_SUCCESS; } /***************************************************************************** * aout_MixerDelete: delete the mixer + ***************************************************************************** + * Please note that you must hold the mixer lock. *****************************************************************************/ void aout_MixerDelete( aout_instance_t * p_aout ) { - module_Unneed( p_aout, p_aout->mixer.p_module ); + if( !p_aout->p_mixer ) + return; + + module_unneed( p_aout->p_mixer, p_aout->p_mixer->module ); + + free( p_aout->p_mixer->input ); + vlc_object_release( p_aout->p_mixer ); + + /* */ + p_aout->p_mixer = NULL; } /***************************************************************************** - * aout_MixerRun: entry point for the mixer & post-filters processing + * MixBuffer: try to prepare one output buffer + ***************************************************************************** + * Please note that you must hold the mixer lock. *****************************************************************************/ -void aout_MixerRun( aout_instance_t * p_aout ) +static int MixBuffer( aout_instance_t * p_aout ) { - int i; + int i, i_first_input = 0; aout_buffer_t * p_output_buffer; + mtime_t start_date, end_date; + date_t exact_start_date; + + if( !p_aout->p_mixer ) + { + /* Free all incoming buffers. */ + aout_lock_input_fifos( p_aout ); + for ( i = 0; i < p_aout->i_nb_inputs; i++ ) + { + aout_input_t * p_input = p_aout->pp_inputs[i]; + aout_buffer_t * p_buffer = p_input->mixer.fifo.p_first; + if ( p_input->b_error ) continue; + while ( p_buffer != NULL ) + { + aout_buffer_t * p_next = p_buffer->p_next; + aout_BufferFree( p_buffer ); + p_buffer = p_next; + } + } + aout_unlock_input_fifos( p_aout ); + return -1; + } + + + aout_lock_input_fifos( p_aout ); + aout_lock_output_fifo( p_aout ); + + /* Retrieve the date of the next buffer. */ + exact_start_date = p_aout->output.fifo.end_date; + start_date = date_Get( &exact_start_date ); + + 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 (%"PRId64"), clearing out", + mdate() - start_date ); + aout_FifoSet( p_aout, &p_aout->output.fifo, 0 ); + date_Set( &exact_start_date, 0 ); + start_date = 0; + } + + aout_unlock_output_fifo( p_aout ); /* See if we have enough data to prepare a new buffer for the audio - * output. */ - mtime_t wanted_date = 0, first_date = 0; + * 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->mixer.fifo; + aout_buffer_t * p_buffer; + + if ( p_input->b_error || p_input->b_paused ) + continue; + + p_buffer = p_fifo->p_first; + while ( p_buffer != NULL && p_buffer->i_pts < mdate() ) + { + msg_Warn( p_aout, "input PTS is out of range (%"PRId64"), " + "trashing", mdate() - p_buffer->i_pts ); + p_buffer = aout_FifoPop( p_aout, p_fifo ); + aout_BufferFree( p_buffer ); + p_buffer = p_fifo->p_first; + p_input->mixer.begin = NULL; + } + + if ( p_buffer == NULL ) + { + break; + } + + if ( !start_date || start_date < p_buffer->i_pts ) + { + date_Set( &exact_start_date, p_buffer->i_pts ); + start_date = p_buffer->i_pts; + } + } + + if ( i < p_aout->i_nb_inputs ) + { + /* Interrupted before the end... We can't run. */ + aout_unlock_input_fifos( p_aout ); + return -1; + } + } + date_Increment( &exact_start_date, p_aout->output.i_nb_samples ); + end_date = date_Get( &exact_start_date ); + /* Check that start_date and end_date are available for all input + * streams. */ for ( i = 0; i < p_aout->i_nb_inputs; i++ ) { - aout_fifo_t * p_fifo = &p_aout->pp_inputs[i]->fifo; + aout_input_t * p_input = p_aout->pp_inputs[i]; + aout_fifo_t * p_fifo = &p_input->mixer.fifo; aout_buffer_t * p_buffer; - vlc_mutex_lock( &p_fifo->lock ); - for ( p_buffer = p_fifo->p_first; p_buffer != NULL; - p_buffer = p_buffer->p_next ) + mtime_t prev_date; + bool b_drop_buffers; + + p_input->mixer.is_invalid = p_input->b_error || p_input->b_paused; + if ( p_input->mixer.is_invalid ) + { + if ( i_first_input == i ) i_first_input++; + continue; + } + + p_buffer = p_fifo->p_first; + if ( p_buffer == NULL ) + { + break; + } + + /* Check for the continuity of start_date */ + while ( p_buffer != NULL + && p_buffer->i_pts + p_buffer->i_length < start_date - 1 ) + { + /* We authorize a +-1 because rounding errors get compensated + * regularly. */ + aout_buffer_t * p_next = p_buffer->p_next; + msg_Warn( p_aout, "the mixer got a packet in the past (%"PRId64")", + start_date - (p_buffer->i_pts + p_buffer->i_length) ); + aout_BufferFree( p_buffer ); + p_fifo->p_first = p_buffer = p_next; + p_input->mixer.begin = NULL; + } + if ( p_buffer == NULL ) + { + p_fifo->pp_last = &p_fifo->p_first; + break; + } + + /* Check that we have enough samples. */ + for ( ; ; ) { - if ( !wanted_date ) + p_buffer = p_fifo->p_first; + if ( p_buffer == NULL ) break; + if ( p_buffer->i_pts + p_buffer->i_length >= end_date ) break; + + /* Check that all buffers are contiguous. */ + prev_date = p_fifo->p_first->i_pts + p_fifo->p_first->i_length; + p_buffer = p_buffer->p_next; + b_drop_buffers = 0; + for ( ; p_buffer != NULL; p_buffer = p_buffer->p_next ) { - if ( !p_aout->output.last_date ) + if ( prev_date != p_buffer->i_pts ) { - first_date = p_buffer->start_date; - wanted_date = p_buffer->start_date - + (mtime_t)p_aout->output.i_nb_samples * 1000000 - / p_aout->output.output.i_rate; + msg_Warn( p_aout, + "buffer hole, dropping packets (%"PRId64")", + p_buffer->i_pts - prev_date ); + b_drop_buffers = 1; + break; } - else + if ( p_buffer->i_pts + p_buffer->i_length >= end_date ) break; + prev_date = p_buffer->i_pts + p_buffer->i_length; + } + if ( b_drop_buffers ) + { + aout_buffer_t * p_deleted = p_fifo->p_first; + while ( p_deleted != NULL && p_deleted != p_buffer ) { - first_date = p_aout->output.last_date; - wanted_date = p_aout->output.last_date - + (mtime_t)p_aout->output.i_nb_samples * 1000000 - / p_aout->output.output.i_rate; + 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 */ } - - if ( p_buffer->end_date >= wanted_date ) break; + else break; } - vlc_mutex_unlock( &p_fifo->lock ); if ( p_buffer == NULL ) break; + + p_buffer = p_fifo->p_first; + if ( !AOUT_FMT_NON_LINEAR( &p_aout->p_mixer->fmt ) ) + { + /* Additionally check that p_first_byte_to_mix is well + * located. */ + mtime_t i_buffer = (start_date - p_buffer->i_pts) + * p_aout->p_mixer->fmt.i_bytes_per_frame + * p_aout->p_mixer->fmt.i_rate + / p_aout->p_mixer->fmt.i_frame_length + / 1000000; + ptrdiff_t mixer_nb_bytes; + + if ( p_input->mixer.begin == NULL ) + { + p_input->mixer.begin = p_buffer->p_buffer; + } + mixer_nb_bytes = p_input->mixer.begin - p_buffer->p_buffer; + + if ( !((i_buffer + p_aout->p_mixer->fmt.i_bytes_per_frame + > mixer_nb_bytes) && + (i_buffer < p_aout->p_mixer->fmt.i_bytes_per_frame + + mixer_nb_bytes)) ) + { + msg_Warn( p_aout, "mixer start isn't output start (%"PRId64")", + i_buffer - mixer_nb_bytes ); + + /* Round to the nearest multiple */ + i_buffer /= p_aout->p_mixer->fmt.i_bytes_per_frame; + i_buffer *= p_aout->p_mixer->fmt.i_bytes_per_frame; + if( i_buffer < 0 ) + { + /* Is it really the best way to do it ? */ + aout_lock_output_fifo( p_aout ); + aout_FifoSet( p_aout, &p_aout->output.fifo, 0 ); + date_Set( &exact_start_date, 0 ); + aout_unlock_output_fifo( p_aout ); + break; + } + + p_input->mixer.begin = p_buffer->p_buffer + i_buffer; + } + } } - if ( i < p_aout->i_nb_inputs ) + if ( i < p_aout->i_nb_inputs || i_first_input == p_aout->i_nb_inputs ) { /* Interrupted before the end... We can't run. */ - return; + aout_unlock_input_fifos( p_aout ); + 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 ); + p_output_buffer = aout_BufferAlloc( &p_aout->p_mixer->allocation, + ((uint64_t)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[i_first_input]->mixer.fifo.p_first); if ( p_output_buffer == NULL ) { - msg_Err( p_aout, "out of memory" ); - return; + aout_unlock_input_fifos( p_aout ); + return -1; + } + /* This is again a bit kludgy - for the S/PDIF mixer. */ + if ( p_aout->p_mixer->allocation.b_alloc ) + { + p_output_buffer->i_nb_samples = p_aout->output.i_nb_samples; + p_output_buffer->i_buffer = p_aout->output.i_nb_samples + * p_aout->p_mixer->fmt.i_bytes_per_frame + / p_aout->p_mixer->fmt.i_frame_length; } - p_output_buffer->i_nb_samples = p_aout->output.i_nb_samples; - p_output_buffer->start_date = first_date; - p_output_buffer->end_date = wanted_date; - p_aout->output.last_date = wanted_date; + p_output_buffer->i_pts = start_date; + p_output_buffer->i_length = end_date - start_date; + + p_aout->p_mixer->mix( p_aout->p_mixer, p_output_buffer ); - p_aout->mixer.pf_do_work( p_aout, p_output_buffer ); + aout_unlock_input_fifos( p_aout ); aout_OutputPlay( p_aout, p_output_buffer ); + + return 0; +} + +/***************************************************************************** + * aout_MixerRun: entry point for the mixer & post-filters processing + ***************************************************************************** + * Please note that you must hold the mixer lock. + *****************************************************************************/ +void aout_MixerRun( aout_instance_t * p_aout ) +{ + while( MixBuffer( p_aout ) != -1 ); +} + +/***************************************************************************** + * aout_MixerMultiplierSet: set p_aout->mixer.f_multiplier + ***************************************************************************** + * Please note that we assume that you own the mixer lock when entering this + * function. This function returns -1 on error. + *****************************************************************************/ +int aout_MixerMultiplierSet( aout_instance_t * p_aout, float f_multiplier ) +{ + float f_old = p_aout->mixer_multiplier; + bool b_new_mixer = false; + + if ( p_aout->p_mixer ) + { + aout_MixerDelete( p_aout ); + b_new_mixer = true; + } + + p_aout->mixer_multiplier = f_multiplier; + + if ( b_new_mixer && aout_MixerNew( p_aout ) ) + { + p_aout->mixer_multiplier = f_old; + aout_MixerNew( p_aout ); + return -1; + } + + return 0; +} + +/***************************************************************************** + * aout_MixerMultiplierGet: get p_aout->mixer.f_multiplier + ***************************************************************************** + * Please note that we assume that you own the mixer lock when entering this + * function. This function returns -1 on error. + *****************************************************************************/ +int aout_MixerMultiplierGet( aout_instance_t * p_aout, float * pf_multiplier ) +{ + *pf_multiplier = p_aout->mixer_multiplier; + return 0; }