summaryrefslogtreecommitdiffstats
path: root/libmpcodecs/dec_audio.c
blob: 6e391e19f15ca02f211e6d43824918c7af2a2897 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>

#include "config.h"
#include "mp_msg.h"
#include "help_mp.h"

#include "stream.h"
#include "demuxer.h"

#include "codec-cfg.h"
#include "stheader.h"

#include "dec_audio.h"
#include "ad.h"
#include "libaf/af_format.h"

#include "libaf/af.h"

#ifdef DYNAMIC_PLUGINS
#include <dlfcn.h>
#endif

#ifdef USE_FAKE_MONO
int fakemono=0;
#endif
/* used for ac3surround decoder - set using -channels option */
int audio_output_channels = 2;
af_cfg_t af_cfg = {1, NULL}; // Configuration for audio filters

void afm_help(void){
    int i;
    mp_msg(MSGT_DECAUDIO,MSGL_INFO,MSGTR_AvailableAudioFm);
    if (identify)
      mp_msg(MSGT_GLOBAL, MSGL_INFO, "ID_AUDIO_DRIVERS\n");
    mp_msg(MSGT_DECAUDIO,MSGL_INFO,"    afm:    info:  (comment)\n");
    for (i=0; mpcodecs_ad_drivers[i] != NULL; i++)
      if(mpcodecs_ad_drivers[i]->info->comment && mpcodecs_ad_drivers[i]->info->comment[0])
	mp_msg(MSGT_DECAUDIO,MSGL_INFO,"%9s  %s (%s)\n",
	    mpcodecs_ad_drivers[i]->info->short_name,
	    mpcodecs_ad_drivers[i]->info->name,
	    mpcodecs_ad_drivers[i]->info->comment);
      else
	mp_msg(MSGT_DECAUDIO,MSGL_INFO,"%9s  %s\n",
	    mpcodecs_ad_drivers[i]->info->short_name,
	    mpcodecs_ad_drivers[i]->info->name);
}

int init_audio_codec(sh_audio_t *sh_audio)
{
  if ((af_cfg.force & AF_INIT_FORMAT_MASK) == AF_INIT_FLOAT) {
      int fmt = AF_FORMAT_FLOAT_NE;
      if (sh_audio->ad_driver->control(sh_audio, ADCTRL_QUERY_FORMAT,
				       &fmt) == CONTROL_TRUE) {
	  sh_audio->sample_format = fmt;
	  sh_audio->samplesize = 4;
      }
  }
  if(!sh_audio->ad_driver->preinit(sh_audio))
  {
      mp_msg(MSGT_DECAUDIO,MSGL_ERR,MSGTR_ADecoderPreinitFailed);
      return 0;
  }

/* allocate audio in buffer: */
  if(sh_audio->audio_in_minsize>0){
      sh_audio->a_in_buffer_size=sh_audio->audio_in_minsize;
      mp_msg(MSGT_DECAUDIO,MSGL_V,MSGTR_AllocatingBytesForInputBuffer,
          sh_audio->a_in_buffer_size);
      sh_audio->a_in_buffer=malloc(sh_audio->a_in_buffer_size);
      memset(sh_audio->a_in_buffer,0,sh_audio->a_in_buffer_size);
      sh_audio->a_in_buffer_len=0;
  }

/* allocate audio out buffer: */
  sh_audio->a_buffer_size=sh_audio->audio_out_minsize+MAX_OUTBURST; /* worst case calc.*/

  mp_msg(MSGT_DECAUDIO,MSGL_V,MSGTR_AllocatingBytesForOutputBuffer,
      sh_audio->audio_out_minsize,MAX_OUTBURST,sh_audio->a_buffer_size);

  sh_audio->a_buffer=malloc(sh_audio->a_buffer_size);
  if(!sh_audio->a_buffer){
      mp_msg(MSGT_DECAUDIO,MSGL_ERR,MSGTR_CantAllocAudioBuf);
      return 0;
  }
  memset(sh_audio->a_buffer,0,sh_audio->a_buffer_size);
  sh_audio->a_buffer_len=0;

  if(!sh_audio->ad_driver->init(sh_audio)){
      mp_msg(MSGT_DECAUDIO,MSGL_WARN,MSGTR_ADecoderInitFailed);
      uninit_audio(sh_audio); // free buffers
      return 0;
  }

  sh_audio->inited=1;
  
  if(!sh_audio->channels || !sh_audio->samplerate){
    mp_msg(MSGT_DECAUDIO,MSGL_WARN,MSGTR_UnknownAudio);
    uninit_audio(sh_audio); // free buffers
    return 0;
  }

  if(!sh_audio->o_bps)
  sh_audio->o_bps=sh_audio->channels*sh_audio->samplerate*sh_audio->samplesize;

  mp_msg(MSGT_DECAUDIO,MSGL_INFO,"AUDIO: %d Hz, %d ch, %s, %3.1f kbit/%3.2f%% (ratio: %d->%d)\n",
	sh_audio->samplerate,sh_audio->channels,
	af_fmt2str_short(sh_audio->sample_format),
	sh_audio->i_bps*8*0.001,((float)sh_audio->i_bps/sh_audio->o_bps)*100.0,
        sh_audio->i_bps,sh_audio->o_bps);

  sh_audio->a_out_buffer_size=sh_audio->a_buffer_size;
  sh_audio->a_out_buffer=sh_audio->a_buffer;
  sh_audio->a_out_buffer_len=sh_audio->a_buffer_len;
  
  return 1;
}

int init_audio(sh_audio_t *sh_audio,char* codecname,char* afm,int status){
    unsigned int orig_fourcc=sh_audio->wf?sh_audio->wf->wFormatTag:0;
    int force = 0;
    if (codecname && codecname[0] == '+') {
      codecname = &codecname[1];
      force = 1;
    }
    sh_audio->codec=NULL;
    while(1){
	ad_functions_t* mpadec;
	int i;
	sh_audio->ad_driver = 0;
	// restore original fourcc:
	if(sh_audio->wf) sh_audio->wf->wFormatTag=i=orig_fourcc;
	if(!(sh_audio->codec=find_audio_codec(sh_audio->format,
          sh_audio->wf?(&i):NULL, sh_audio->codec, force) )) break;
	if(sh_audio->wf) sh_audio->wf->wFormatTag=i;
	// ok we found one codec
	if(sh_audio->codec->flags&CODECS_FLAG_SELECTED) continue; // already tried & failed
	if(codecname && strcmp(sh_audio->codec->name,codecname)) continue; // -ac
	if(afm && strcmp(sh_audio->codec->drv,afm)) continue; // afm doesn't match
	if(!force && sh_audio->codec->status<status) continue; // too unstable
	sh_audio->codec->flags|=CODECS_FLAG_SELECTED; // tagging it
	// ok, it matches all rules, let's find the driver!
	for (i=0; mpcodecs_ad_drivers[i] != NULL; i++)
	    if(!strcmp(mpcodecs_ad_drivers[i]->info->short_name,sh_audio->codec->drv)) break;
	mpadec=mpcodecs_ad_drivers[i];
#ifdef DYNAMIC_PLUGINS
	if (!mpadec)
	{
	    /* try to open shared decoder plugin */
	    int buf_len;
	    char *buf;
	    ad_functions_t *funcs_sym;
	    ad_info_t *info_sym;
	    
	    buf_len = strlen(MPLAYER_LIBDIR)+strlen(sh_audio->codec->drv)+16;
	    buf = malloc(buf_len);
	    if (!buf)
		break;
	    snprintf(buf, buf_len, "%s/mplayer/ad_%s.so", MPLAYER_LIBDIR, sh_audio->codec->drv);
	    mp_msg(MSGT_DECAUDIO, MSGL_DBG2, "Trying to open external plugin: %s\n", buf);
	    sh_audio->dec_handle = dlopen(buf, RTLD_LAZY);
	    if (!sh_audio->dec_handle)
		break;
	    snprintf(buf, buf_len, "mpcodecs_ad_%s", sh_audio->codec->drv);
	    funcs_sym = dlsym(sh_audio->dec_handle, buf);
	    if (!funcs_sym || !funcs_sym->info || !funcs_sym->preinit ||
		!funcs_sym->init || !funcs_sym->uninit || !funcs_sym->control ||
		!funcs_sym->decode_audio)
		break;
	    info_sym = funcs_sym->info;
	    if (strcmp(info_sym->short_name, sh_audio->codec->drv))
		break;
	    free(buf);
	    mpadec = funcs_sym;
	    mp_msg(MSGT_DECAUDIO, MSGL_V, "Using external decoder plugin (%s/mplayer/ad_%s.so)!\n",
		MPLAYER_LIBDIR, sh_audio->codec->drv);
	}
#endif
	if(!mpadec){ // driver not available (==compiled in)
            mp_msg(MSGT_DECAUDIO,MSGL_ERR,MSGTR_AudioCodecFamilyNotAvailableStr,
        	sh_audio->codec->name, sh_audio->codec->drv);
	    continue;
	}
	// it's available, let's try to init!
	// init()
	mp_msg(MSGT_DECAUDIO,MSGL_INFO,MSGTR_OpeningAudioDecoder,mpadec->info->short_name,mpadec->info->name);
	sh_audio->ad_driver = mpadec;
	if(!init_audio_codec(sh_audio)){
	    mp_msg(MSGT_DECAUDIO,MSGL_INFO,MSGTR_ADecoderInitFailed);
	    continue; // try next...
	}
	// Yeah! We got it!
	return 1;
    }
    return 0;
}

extern char *get_path(char *filename);

int init_best_audio_codec(sh_audio_t *sh_audio,char** audio_codec_list,char** audio_fm_list){
char* ac_l_default[2]={"",(char*)NULL};
// hack:
if(!audio_codec_list) audio_codec_list=ac_l_default;
// Go through the codec.conf and find the best codec...
sh_audio->inited=0;
codecs_reset_selection(1);
while(!sh_audio->inited && *audio_codec_list){
  char* audio_codec=*(audio_codec_list++);
  if(audio_codec[0]){
    if(audio_codec[0]=='-'){
      // disable this codec:
      select_codec(audio_codec+1,1);
    } else {
      // forced codec by name:
      mp_msg(MSGT_DECAUDIO,MSGL_INFO,MSGTR_ForcedAudioCodec,audio_codec);
      init_audio(sh_audio,audio_codec,NULL,-1);
    }
  } else {
    int status;
    // try in stability order: UNTESTED, WORKING, BUGGY. never try CRASHING.
    if(audio_fm_list){
      char** fmlist=audio_fm_list;
      // try first the preferred codec families:
      while(!sh_audio->inited && *fmlist){
        char* audio_fm=*(fmlist++);
	mp_msg(MSGT_DECAUDIO,MSGL_INFO,MSGTR_TryForceAudioFmtStr,audio_fm);
	for(status=CODECS_STATUS__MAX;status>=CODECS_STATUS__MIN;--status)
	    if(init_audio(sh_audio,NULL,audio_fm,status)) break;
      }
    }
    if(!sh_audio->inited)
	for(status=CODECS_STATUS__MAX;status>=CODECS_STATUS__MIN;--status)
	    if(init_audio(sh_audio,NULL,NULL,status)) break;
  }
}

if(!sh_audio->inited){
    mp_msg(MSGT_DECAUDIO,MSGL_ERR,MSGTR_CantFindAudioCodec,sh_audio->format);
    mp_msg(MSGT_DECAUDIO,MSGL_HINT, MSGTR_RTFMCodecs);
    return 0; // failed
}

mp_msg(MSGT_DECAUDIO,MSGL_INFO,MSGTR_SelectedAudioCodec,
    sh_audio->codec->name,sh_audio->codec->drv,sh_audio->codec->info);
return 1; // success
}

void uninit_audio(sh_audio_t *sh_audio)
{
    if(sh_audio->afilter){
	mp_msg(MSGT_DECAUDIO,MSGL_V,"Uninit audio filters...\n");
	af_uninit(sh_audio->afilter);
	free(sh_audio->afilter);
	sh_audio->afilter=NULL;
    }
    if(sh_audio->inited){
	mp_msg(MSGT_DECAUDIO,MSGL_V,MSGTR_UninitAudioStr,sh_audio->codec->drv);
	sh_audio->ad_driver->uninit(sh_audio);
#ifdef DYNAMIC_PLUGINS
	if (sh_audio->dec_handle)
	    dlclose(sh_audio->dec_handle);
#endif
	sh_audio->inited=0;
    }
    if(sh_audio->a_out_buffer!=sh_audio->a_buffer) free(sh_audio->a_out_buffer);
    sh_audio->a_out_buffer=NULL;
    sh_audio->a_out_buffer_size=0;
    if(sh_audio->a_buffer) free(sh_audio->a_buffer);
    sh_audio->a_buffer=NULL;
    if(sh_audio->a_in_buffer) free(sh_audio->a_in_buffer);
    sh_audio->a_in_buffer=NULL;
}

 /* Init audio filters */
int preinit_audio_filters(sh_audio_t *sh_audio, 
	int in_samplerate, int in_channels, int in_format,
	int* out_samplerate, int* out_channels, int* out_format){
  return init_audio_filters(sh_audio, in_samplerate, in_channels, in_format,
      out_samplerate, out_channels, out_format, 0, 0);
}

 /* Init audio filters */
int init_audio_filters(sh_audio_t *sh_audio, 
	int in_samplerate, int in_channels, int in_format,
	int *out_samplerate, int *out_channels, int *out_format,
	int out_minsize, int out_maxsize){
  af_stream_t* afs=sh_audio->afilter;
  if(!afs){
    afs = (af_stream_t*)malloc(sizeof(af_stream_t));
    memset(afs,0,sizeof(af_stream_t));
  }

  // input format: same as codec's output format:
  afs->input.rate   = in_samplerate;
  afs->input.nch    = in_channels;
  afs->input.format = in_format;
  af_fix_parameters(&(afs->input));

  // output format: same as ao driver's input format (if missing, fallback to input)
  afs->output.rate   = *out_samplerate;
  afs->output.nch    = *out_channels;
  afs->output.format = *out_format;
  af_fix_parameters(&(afs->output));

  // filter config:  
  memcpy(&afs->cfg,&af_cfg,sizeof(af_cfg_t));
  
  mp_msg(MSGT_DECAUDIO, MSGL_V, MSGTR_BuildingAudioFilterChain,
      afs->input.rate,afs->input.nch,af_fmt2str_short(afs->input.format),
      afs->output.rate,afs->output.nch,af_fmt2str_short(afs->output.format));
  
  // let's autoprobe it!
  if(0 != af_init(afs)){
    sh_audio->afilter=NULL;
    free(afs);
    return 0; // failed :(
  }

  *out_samplerate=afs->output.rate;
  *out_channels=afs->output.nch;
  *out_format=afs->output.format;
  
  if (out_maxsize || out_minsize) {
  // allocate the a_out_* buffers:
  if(out_maxsize<out_minsize) out_maxsize=out_minsize;
  if(out_maxsize<8192) out_maxsize=MAX_OUTBURST; // not sure this is ok

  sh_audio->a_out_buffer_size=out_maxsize;
  sh_audio->a_out_buffer=malloc(sh_audio->a_out_buffer_size);
  memset(sh_audio->a_out_buffer,0,sh_audio->a_out_buffer_size);
  sh_audio->a_out_buffer_len=0;
  }
  
  // ok!
  sh_audio->afilter=(void*)afs;
  return 1;
}

int decode_audio(sh_audio_t *sh_audio,unsigned char *buf,int minlen,int maxlen)
{
  int declen;
  af_data_t  afd;  // filter input
  af_data_t* pafd; // filter output
  ad_functions_t* mpadec = sh_audio->ad_driver;

  if(!sh_audio->inited) return -1; // no codec
  if(!sh_audio->afilter){
      // no filter, just decode:
      // FIXME: don't drop initial decoded data in a_buffer!
      return mpadec->decode_audio(sh_audio,buf,minlen,maxlen);
  }
  
//  declen=af_inputlen(sh_audio->afilter,minlen);
  declen=af_calc_insize_constrained(sh_audio->afilter,minlen,maxlen,
      sh_audio->a_buffer_size-sh_audio->audio_out_minsize);

  mp_msg(MSGT_DECAUDIO,MSGL_DBG2,"\ndecaudio: minlen=%d maxlen=%d declen=%d (max=%d)\n",
      minlen, maxlen, declen, sh_audio->a_buffer_size);

  if(declen<=0) return -1; // error!

  // limit declen to buffer size: - DONE by af_calc_insize_constrained
//  if(declen>sh_audio->a_buffer_size) declen=sh_audio->a_buffer_size;

  // decode if needed:
  while(declen>sh_audio->a_buffer_len){
      int len=declen-sh_audio->a_buffer_len;
      int maxlen=sh_audio->a_buffer_size-sh_audio->a_buffer_len;

      mp_msg(MSGT_DECAUDIO,MSGL_DBG2,"decaudio: decoding %d bytes, max: %d (%d)\n",
        len, maxlen, sh_audio->audio_out_minsize);

      if(maxlen<sh_audio->audio_out_minsize) break; // don't overflow buffer!
      // not enough decoded data waiting, decode 'len' bytes more:
      len=mpadec->decode_audio(sh_audio,
          sh_audio->a_buffer+sh_audio->a_buffer_len, len, maxlen);
      if(len<=0) break; // EOF?
      sh_audio->a_buffer_len+=len;
  }
  if(declen>sh_audio->a_buffer_len)
    declen=sh_audio->a_buffer_len; // still no enough data (EOF) :(

  // round to whole samples:
//  declen/=sh_audio->samplesize*sh_audio->channels;
//  declen*=sh_audio->samplesize*sh_audio->channels;

  // run the filters:
  afd.audio=sh_audio->a_buffer;
  afd.len=declen;
  afd.rate=sh_audio->samplerate;
  afd.nch=sh_audio->channels;
  afd.format=sh_audio->sample_format;
  af_fix_parameters(&afd);
  //pafd=&afd;
//  printf("\nAF: %d --> ",declen);
  pafd=af_play(sh_audio->afilter,&afd);
//  printf("%d  \n",pafd->len);

  if(!pafd) return -1; // error

  mp_msg(MSGT_DECAUDIO,MSGL_DBG2,"decaudio: declen=%d out=%d (max %d)\n",
      declen, pafd->len, maxlen);
  
  // copy filter==>out:
  if(maxlen < pafd->len) {
    maxlen -= maxlen % (sh_audio->channels * sh_audio->samplesize);
    mp_msg(MSGT_DECAUDIO,MSGL_WARN,"%i bytes of audio data lost due to buffer overflow, len = %i\n", pafd->len - maxlen,pafd->len);
  }
  else
    maxlen=pafd->len;
  memmove(buf, pafd->audio, maxlen);
  
  // remove processed data from decoder buffer:
  sh_audio->a_buffer_len-=declen;
  if(sh_audio->a_buffer_len>0)
    memmove(sh_audio->a_buffer, sh_audio->a_buffer+declen, sh_audio->a_buffer_len);
  
  return maxlen;
}

void resync_audio_stream(sh_audio_t *sh_audio)
{
  sh_audio->a_in_buffer_len=0;        // clear audio input buffer
  if(!sh_audio->inited) return;
  sh_audio->ad_driver->control(sh_audio,ADCTRL_RESYNC_STREAM,NULL);
}

void skip_audio_frame(sh_audio_t *sh_audio)
{
  if(!sh_audio->inited) return;
  if(sh_audio->ad_driver->control(sh_audio,ADCTRL_SKIP_FRAME,NULL)==CONTROL_TRUE) return;
  // default skip code:
  ds_fill_buffer(sh_audio->ds);  // skip block
}

void adjust_volume(void)
{
}