dec.c 12.8 KB
Newer Older
1 2 3
/*****************************************************************************
 * dec.c : audio output API towards decoders
 *****************************************************************************
4
 * Copyright (C) 2002-2007 the VideoLAN team
5
 * $Id$
6 7 8 9 10 11 12
 *
 * 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
 * (at your option) any later version.
13
 *
14 15 16 17 18 19 20
 * 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
Antoine Cellerier's avatar
Antoine Cellerier committed
21
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
22 23 24 25 26
 *****************************************************************************/

/*****************************************************************************
 * Preamble
 *****************************************************************************/
27 28 29 30
#ifdef HAVE_CONFIG_H
# include "config.h"
#endif

31
#include <vlc_common.h>
32 33 34 35 36

#ifdef HAVE_ALLOCA_H
#   include <alloca.h>
#endif

Clément Stenac's avatar
Clément Stenac committed
37 38 39
#include <vlc_aout.h>
#include <vlc_input.h>

40 41
#include "aout_internal.h"

Clément Stenac's avatar
Clément Stenac committed
42 43
/** FIXME: Ugly but needed to access the counters */
#include "input/input_internal.h"
44 45 46 47

/*****************************************************************************
 * aout_DecNew : create a decoder
 *****************************************************************************/
Gildas Bazin's avatar
 
Gildas Bazin committed
48
static aout_input_t * DecNew( vlc_object_t * p_this, aout_instance_t * p_aout,
49 50
                              audio_sample_format_t *p_format,
                              audio_replay_gain_t *p_replay_gain )
51 52
{
    aout_input_t * p_input;
Gildas Bazin's avatar
 
Gildas Bazin committed
53
    input_thread_t * p_input_thread;
54

55 56 57 58 59
    /* Sanitize audio format */
    if( p_format->i_channels > 32 )
    {
        msg_Err( p_aout, "too many audio channels (%u)",
                 p_format->i_channels );
60
        return NULL;
61
    }
62 63 64 65 66
    if( p_format->i_channels <= 0 )
    {
        msg_Err( p_aout, "no audio channels" );
        return NULL;
    }
67 68 69 70 71

    if( p_format->i_rate > 192000 )
    {
        msg_Err( p_aout, "excessive audio sample frequency (%u)",
                 p_format->i_rate );
72
        return NULL;
73
    }
74 75 76 77 78 79
    if( p_format->i_rate < 4000 )
    {
        msg_Err( p_aout, "too low audio sample frequency (%u)",
                 p_format->i_rate );
        return NULL;
    }
80

81 82
    /* We can only be called by the decoder, so no need to lock
     * p_input->lock. */
83
    aout_lock_mixer( p_aout );
84 85 86 87

    if ( p_aout->i_nb_inputs >= AOUT_MAX_INPUTS )
    {
        msg_Err( p_aout, "too many inputs already (%d)", p_aout->i_nb_inputs );
Rémi Denis-Courmont's avatar
Rémi Denis-Courmont committed
88
        goto error;
89 90 91 92
    }

    p_input = malloc(sizeof(aout_input_t));
    if ( p_input == NULL )
Rémi Denis-Courmont's avatar
Rémi Denis-Courmont committed
93
        goto error;
94
    memset( p_input, 0, sizeof(aout_input_t) );
95

96
    vlc_mutex_init( &p_input->lock );
97 98 99

    p_input->b_changed = 0;
    p_input->b_error = 1;
100

101
    aout_FormatPrepare( p_format );
102

103 104
    memcpy( &p_input->input, p_format,
            sizeof(audio_sample_format_t) );
105 106
    if( p_replay_gain )
        p_input->replay_gain = *p_replay_gain;
107

108
    aout_lock_input_fifos( p_aout );
109 110 111 112 113 114 115
    p_aout->pp_inputs[p_aout->i_nb_inputs] = p_input;
    p_aout->i_nb_inputs++;

    if ( p_aout->mixer.b_error )
    {
        int i;

Gildas Bazin's avatar
 
Gildas Bazin committed
116 117
        var_Destroy( p_aout, "audio-device" );
        var_Destroy( p_aout, "audio-channels" );
118

119 120 121 122 123
        /* Recreate the output using the new format. */
        if ( aout_OutputNew( p_aout, p_format ) < 0 )
        {
            for ( i = 0; i < p_aout->i_nb_inputs - 1; i++ )
            {
124
                aout_lock_input( p_aout, p_aout->pp_inputs[i] );
125
                aout_InputDelete( p_aout, p_aout->pp_inputs[i] );
126
                aout_unlock_input( p_aout, p_aout->pp_inputs[i] );
127
            }
128 129
            aout_unlock_input_fifos( p_aout );
            aout_unlock_mixer( p_aout );
130 131 132 133 134 135
            return p_input;
        }

        /* Create other input streams. */
        for ( i = 0; i < p_aout->i_nb_inputs - 1; i++ )
        {
136
            aout_lock_input( p_aout, p_aout->pp_inputs[i] );
137 138
            aout_InputDelete( p_aout, p_aout->pp_inputs[i] );
            aout_InputNew( p_aout, p_aout->pp_inputs[i] );
139
            aout_unlock_input( p_aout, p_aout->pp_inputs[i] );
140 141 142 143 144 145 146 147 148 149
        }
    }
    else
    {
        aout_MixerDelete( p_aout );
    }

    if ( aout_MixerNew( p_aout ) == -1 )
    {
        aout_OutputDelete( p_aout );
150
        aout_unlock_input_fifos( p_aout );
Rémi Denis-Courmont's avatar
Rémi Denis-Courmont committed
151
        goto error;
152 153 154
    }

    aout_InputNew( p_aout, p_input );
155
    aout_unlock_input_fifos( p_aout );
156

157
    aout_unlock_mixer( p_aout );
Antoine Cellerier's avatar
Oops.  
Antoine Cellerier committed
158
    p_input->i_desync = var_CreateGetInteger( p_this, "audio-desync" ) * 1000;
Gildas Bazin's avatar
 
Gildas Bazin committed
159

Gildas Bazin's avatar
 
Gildas Bazin committed
160 161 162 163
    p_input_thread = (input_thread_t *)vlc_object_find( p_this,
                                           VLC_OBJECT_INPUT, FIND_PARENT );
    if( p_input_thread )
    {
Gildas Bazin's avatar
 
Gildas Bazin committed
164 165
        p_input->i_pts_delay = p_input_thread->i_pts_delay;
        p_input->i_pts_delay += p_input->i_desync;
Clément Stenac's avatar
Clément Stenac committed
166
        p_input->p_input_thread = p_input_thread;
Gildas Bazin's avatar
 
Gildas Bazin committed
167 168 169 170
        vlc_object_release( p_input_thread );
    }
    else
    {
Gildas Bazin's avatar
 
Gildas Bazin committed
171 172
        p_input->i_pts_delay = DEFAULT_PTS_DELAY;
        p_input->i_pts_delay += p_input->i_desync;
Clément Stenac's avatar
Clément Stenac committed
173
        p_input->p_input_thread = NULL;
Gildas Bazin's avatar
 
Gildas Bazin committed
174 175
    }

176
    return p_input;
Rémi Denis-Courmont's avatar
Rémi Denis-Courmont committed
177 178

error:
179
    aout_unlock_mixer( p_aout );
Rémi Denis-Courmont's avatar
Rémi Denis-Courmont committed
180
    return NULL;
181 182 183 184
}

aout_input_t * __aout_DecNew( vlc_object_t * p_this,
                              aout_instance_t ** pp_aout,
185 186
                              audio_sample_format_t * p_format,
                              audio_replay_gain_t *p_replay_gain )
187
{
188 189
    aout_instance_t *p_aout = *pp_aout;
    if ( p_aout == NULL )
190
    {
191 192
        msg_Dbg( p_this, "no aout present, spawning one" );
        p_aout = aout_New( p_this );
193

194 195 196
        /* Everything failed, I'm a loser, I just wanna die */
        if( p_aout == NULL )
            return NULL;
197

198 199
        vlc_object_attach( p_aout, p_this );
        *pp_aout = p_aout;
200 201
    }

202
    return DecNew( p_this, p_aout, p_format, p_replay_gain );
203 204 205 206 207 208 209 210 211 212 213
}

/*****************************************************************************
 * aout_DecDelete : delete a decoder
 *****************************************************************************/
int aout_DecDelete( aout_instance_t * p_aout, aout_input_t * p_input )
{
    int i_input;

    /* This function can only be called by the decoder itself, so no need
     * to lock p_input->lock. */
214
    aout_lock_mixer( p_aout );
215 216 217 218 219 220 221 222 223 224 225 226

    for ( i_input = 0; i_input < p_aout->i_nb_inputs; i_input++ )
    {
        if ( p_aout->pp_inputs[i_input] == p_input )
        {
            break;
        }
    }

    if ( i_input == p_aout->i_nb_inputs )
    {
        msg_Err( p_aout, "cannot find an input to delete" );
227
        aout_unlock_mixer( p_aout );
228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244
        return -1;
    }

    /* Remove the input from the list. */
    memmove( &p_aout->pp_inputs[i_input], &p_aout->pp_inputs[i_input + 1],
             (AOUT_MAX_INPUTS - i_input - 1) * sizeof(aout_input_t *) );
    p_aout->i_nb_inputs--;

    aout_InputDelete( p_aout, p_input );

    vlc_mutex_destroy( &p_input->lock );
    free( p_input );

    if ( !p_aout->i_nb_inputs )
    {
        aout_OutputDelete( p_aout );
        aout_MixerDelete( p_aout );
245 246 247 248 249 250 251 252
        if ( var_Type( p_aout, "audio-device" ) != 0 )
        {
            var_Destroy( p_aout, "audio-device" );
        }
        if ( var_Type( p_aout, "audio-channels" ) != 0 )
        {
            var_Destroy( p_aout, "audio-channels" );
        }
253 254
    }

255
    aout_unlock_mixer( p_aout );
256 257 258 259 260 261 262 263 264 265 266 267

    return 0;
}


/*
 * Buffer management
 */

/*****************************************************************************
 * aout_DecNewBuffer : ask for a new empty buffer
 *****************************************************************************/
268
aout_buffer_t * aout_DecNewBuffer( aout_input_t * p_input,
269 270 271 272 273
                                   size_t i_nb_samples )
{
    aout_buffer_t * p_buffer;
    mtime_t duration;

274
    aout_lock_input( NULL, p_input );
275 276 277

    if ( p_input->b_error )
    {
278
        aout_unlock_input( NULL, p_input );
279 280 281 282 283 284 285
        return NULL;
    }

    duration = (1000000 * (mtime_t)i_nb_samples) / p_input->input.i_rate;

    /* This necessarily allocates in the heap. */
    aout_BufferAlloc( &p_input->input_alloc, duration, NULL, p_buffer );
286 287 288
    if( p_buffer != NULL )
        p_buffer->i_nb_bytes = i_nb_samples * p_input->input.i_bytes_per_frame
                                  / p_input->input.i_frame_length;
289 290 291 292

    /* Suppose the decoder doesn't have more than one buffered buffer */
    p_input->b_changed = 0;

293
    aout_unlock_input( NULL, p_input );
294

295 296
    if( p_buffer == NULL )
        return NULL;
297

298 299
    p_buffer->i_nb_samples = i_nb_samples;
    p_buffer->start_date = p_buffer->end_date = 0;
300 301 302 303 304 305 306 307 308
    return p_buffer;
}

/*****************************************************************************
 * aout_DecDeleteBuffer : destroy an undecoded buffer
 *****************************************************************************/
void aout_DecDeleteBuffer( aout_instance_t * p_aout, aout_input_t * p_input,
                           aout_buffer_t * p_buffer )
{
309
    (void)p_aout; (void)p_input;
310 311 312 313 314 315 316
    aout_BufferFree( p_buffer );
}

/*****************************************************************************
 * aout_DecPlay : filter & mix the decoded buffer
 *****************************************************************************/
int aout_DecPlay( aout_instance_t * p_aout, aout_input_t * p_input,
317
                  aout_buffer_t * p_buffer, int i_input_rate )
318 319 320 321 322 323 324 325
{
    if ( p_buffer->start_date == 0 )
    {
        msg_Warn( p_aout, "non-dated buffer received" );
        aout_BufferFree( p_buffer );
        return -1;
    }

326 327 328 329 330
#ifndef FIXME
    /* This hack for #transcode{acodec=...}:display to work -- Courmisch */
    if( i_input_rate == 0 )
        i_input_rate = INPUT_RATE_DEFAULT;
#endif
331 332 333 334 335 336 337
    if( i_input_rate > INPUT_RATE_DEFAULT * AOUT_MAX_INPUT_RATE ||
        i_input_rate < INPUT_RATE_DEFAULT / AOUT_MAX_INPUT_RATE )
    {
        aout_BufferFree( p_buffer );
        return 0;
    }

Gildas Bazin's avatar
 
Gildas Bazin committed
338
    /* Apply the desynchronisation requested by the user */
Gildas Bazin's avatar
 
Gildas Bazin committed
339 340
    p_buffer->start_date += p_input->i_desync;
    p_buffer->end_date += p_input->i_desync;
Gildas Bazin's avatar
 
Gildas Bazin committed
341

Gildas Bazin's avatar
 
Gildas Bazin committed
342
    if ( p_buffer->start_date > mdate() + p_input->i_pts_delay +
Gildas Bazin's avatar
 
Gildas Bazin committed
343
         AOUT_MAX_ADVANCE_TIME )
344
    {
Rémi Denis-Courmont's avatar
Rémi Denis-Courmont committed
345
        msg_Warn( p_aout, "received buffer in the future (%"PRId64")",
346
                  p_buffer->start_date - mdate());
Clément Stenac's avatar
Clément Stenac committed
347 348
        if( p_input->p_input_thread )
        {
Clément Stenac's avatar
Clément Stenac committed
349
            vlc_mutex_lock( &p_input->p_input_thread->p->counters.counters_lock);
350
            stats_UpdateInteger( p_aout,
Clément Stenac's avatar
Clément Stenac committed
351
                           p_input->p_input_thread->p->counters.p_lost_abuffers,
352
                           1, NULL );
Clément Stenac's avatar
Clément Stenac committed
353
            vlc_mutex_unlock( &p_input->p_input_thread->p->counters.counters_lock);
Clément Stenac's avatar
Clément Stenac committed
354
        }
355 356 357 358
        aout_BufferFree( p_buffer );
        return -1;
    }

359
    p_buffer->end_date = p_buffer->start_date
360
                            + (mtime_t)p_buffer->i_nb_samples * 1000000
361 362
                                / p_input->input.i_rate;

363
    aout_lock_input( p_aout, p_input );
364 365 366

    if ( p_input->b_error )
    {
367
        aout_unlock_input( p_aout, p_input );
368 369 370 371 372 373 374 375 376 377 378 379
        aout_BufferFree( p_buffer );
        return -1;
    }

    if ( p_input->b_changed )
    {
        /* Maybe the allocation size has changed. Re-allocate a buffer. */
        aout_buffer_t * p_new_buffer;
        mtime_t duration = (1000000 * (mtime_t)p_buffer->i_nb_samples)
                            / p_input->input.i_rate;

        aout_BufferAlloc( &p_input->input_alloc, duration, NULL, p_new_buffer );
380 381
        vlc_memcpy( p_new_buffer->p_buffer, p_buffer->p_buffer,
                    p_buffer->i_nb_bytes );
382 383 384 385 386 387 388 389 390 391 392 393
        p_new_buffer->i_nb_samples = p_buffer->i_nb_samples;
        p_new_buffer->i_nb_bytes = p_buffer->i_nb_bytes;
        p_new_buffer->start_date = p_buffer->start_date;
        p_new_buffer->end_date = p_buffer->end_date;
        aout_BufferFree( p_buffer );
        p_buffer = p_new_buffer;
        p_input->b_changed = 0;
    }

    /* If the buffer is too early, wait a while. */
    mwait( p_buffer->start_date - AOUT_MAX_PREPARE_TIME );

394 395 396
    int ret = aout_InputPlay( p_aout, p_input, p_buffer, i_input_rate );

    aout_unlock_input( p_aout, p_input );
397

398
    if ( ret == -1 ) return -1;
399 400

    /* Run the mixer if it is able to run. */
401
    aout_lock_mixer( p_aout );
402
    aout_MixerRun( p_aout );
Clément Stenac's avatar
Clément Stenac committed
403 404
    if( p_input->p_input_thread )
    {
Clément Stenac's avatar
Clément Stenac committed
405
        vlc_mutex_lock( &p_input->p_input_thread->p->counters.counters_lock);
406
        stats_UpdateInteger( p_aout,
Clément Stenac's avatar
Clément Stenac committed
407
                             p_input->p_input_thread->p->counters.p_played_abuffers,
408
                             1, NULL );
Clément Stenac's avatar
Clément Stenac committed
409
        vlc_mutex_unlock( &p_input->p_input_thread->p->counters.counters_lock);
Clément Stenac's avatar
Clément Stenac committed
410
    }
411
    aout_unlock_mixer( p_aout );
412 413 414

    return 0;
}