libmpcodecs/ad_faad.c

   1 /*
   2  * MPlayer AAC decoder using libfaad2
   3  *
   4  * Copyright (C) 2002 Felix Buenemann <atmosfear at users.sourceforge.net>
   5  *
   6  * This file is part of MPlayer.
   7  *
   8  * MPlayer is free software; you can redistribute it and/or modify
   9  * it under the terms of the GNU General Public License as published by
  10  * the Free Software Foundation; either version 2 of the License, or
  11  * (at your option) any later version.
  12  *
  13  * MPlayer is distributed in the hope that it will be useful,
  14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16  * GNU General Public License for more details.
  17  *
  18  * You should have received a copy of the GNU General Public License along
  19  * with MPlayer; if not, write to the Free Software Foundation, Inc.,
  20  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  21  */
  22
  23 #include <stdio.h>
  24 #include <stdlib.h>
  25 #include <unistd.h>
  26
  27 #include "config.h"
  28 #include "ad_internal.h"
  29 #include "libaf/reorder_ch.h"
  30
  31 static ad_info_t info =
  32 {
  33         "AAC (MPEG2/4 Advanced Audio Coding)",
  34         "faad",
  35         "Felix Buenemann",
  36         "faad2",
  37         "uses libfaad2"
  38 };
  39
  40 LIBAD_EXTERN(faad)
  41
  42 #ifndef CONFIG_FAAD_INTERNAL
  43 #include <faad.h>
  44 #else
  45 #include "libfaad2/faad.h"
  46 #endif
  47
  48 /* configure maximum supported channels, *
  49  * this is theoretically max. 64 chans   */
  50 #define FAAD_MAX_CHANNELS 6
  51 #define FAAD_BUFFLEN (FAAD_MIN_STREAMSIZE*FAAD_MAX_CHANNELS)
  52
  53 //#define AAC_DUMP_COMPRESSED
  54
  55 static faacDecHandle faac_hdec;
  56 static faacDecFrameInfo faac_finfo;
  57
  58 static int preinit(sh_audio_t *sh)
  59 {
  60   sh->audio_out_minsize=8192*FAAD_MAX_CHANNELS;
  61   sh->audio_in_minsize=FAAD_BUFFLEN;
  62   return 1;
  63 }
  64
  65 static int aac_probe(unsigned char *buffer, int len)
  66 {
  67   int i = 0, pos = 0;
  68   mp_msg(MSGT_DECAUDIO,MSGL_V, "\nAAC_PROBE: %d bytes\n", len);
  69   while(i <= len-4) {
  70     if(
  71        ((buffer[i] == 0xff) && ((buffer[i+1] & 0xf6) == 0xf0)) ||
  72        (buffer[i] == 'A' && buffer[i+1] == 'D' && buffer[i+2] == 'I' && buffer[i+3] == 'F')
  73     ) {
  74       pos = i;
  75       break;
  76     }
  77     mp_msg(MSGT_DECAUDIO,MSGL_V, "AUDIO PAYLOAD: %x %x %x %x\n", buffer[i], buffer[i+1], buffer[i+2], buffer[i+3]);
  78     i++;
  79   }
  80   mp_msg(MSGT_DECAUDIO,MSGL_V, "\nAAC_PROBE: ret %d\n", pos);
  81   return pos;
  82 }
  83
  84 static int init(sh_audio_t *sh)
  85 {
  86   unsigned long faac_samplerate;
  87   unsigned char faac_channels;
  88   int faac_init, pos = 0;
  89   faac_hdec = faacDecOpen();
  90
  91   // If we don't get the ES descriptor, try manual config
  92   if(!sh->codecdata_len && sh->wf) {
  93     sh->codecdata_len = sh->wf->cbSize;
  94     sh->codecdata = malloc(sh->codecdata_len);
  95     memcpy(sh->codecdata, sh->wf+1, sh->codecdata_len);
  96     mp_msg(MSGT_DECAUDIO,MSGL_DBG2,"FAAD: codecdata extracted from WAVEFORMATEX\n");
  97   }
  98   if(!sh->codecdata_len) {
  99 #if 1
 100     faacDecConfigurationPtr faac_conf;
 101     /* Set the default object type and samplerate */
 102     /* This is useful for RAW AAC files */
 103     faac_conf = faacDecGetCurrentConfiguration(faac_hdec);
 104     if(sh->samplerate)
 105       faac_conf->defSampleRate = sh->samplerate;
 106     /* XXX: FAAD support FLOAT output, how do we handle
 107       * that (FAAD_FMT_FLOAT)? ::atmos
 108       */
 109     if (audio_output_channels <= 2) faac_conf->downMatrix = 1;
 110       switch(sh->samplesize){
 111         case 1: // 8Bit
 112           mp_msg(MSGT_DECAUDIO,MSGL_WARN,"FAAD: 8Bit samplesize not supported by FAAD, assuming 16Bit!\n");
 113         default:
 114           sh->samplesize=2;
 115         case 2: // 16Bit
 116           faac_conf->outputFormat = FAAD_FMT_16BIT;
 117           break;
 118         case 3: // 24Bit
 119           faac_conf->outputFormat = FAAD_FMT_24BIT;
 120           break;
 121         case 4: // 32Bit
 122           faac_conf->outputFormat = FAAD_FMT_32BIT;
 123           break;
 124       }
 125     //faac_conf->defObjectType = LTP; // => MAIN, LC, SSR, LTP available.
 126
 127     faacDecSetConfiguration(faac_hdec, faac_conf);
 128 #endif
 129
 130     sh->a_in_buffer_len = demux_read_data(sh->ds, sh->a_in_buffer, sh->a_in_buffer_size);
 131     pos = aac_probe(sh->a_in_buffer, sh->a_in_buffer_len);
 132     if(pos) {
 133       sh->a_in_buffer_len -= pos;
 134       memmove(sh->a_in_buffer, &(sh->a_in_buffer[pos]), sh->a_in_buffer_len);
 135       sh->a_in_buffer_len +=
 136         demux_read_data(sh->ds,&(sh->a_in_buffer[sh->a_in_buffer_len]),
 137         sh->a_in_buffer_size - sh->a_in_buffer_len);
 138       pos = 0;
 139     }
 140
 141     /* init the codec */
 142     faac_init = faacDecInit(faac_hdec, sh->a_in_buffer,
 143        sh->a_in_buffer_len, &faac_samplerate, &faac_channels);
 144
 145     sh->a_in_buffer_len -= (faac_init > 0)?faac_init:0; // how many bytes init consumed
 146     // XXX FIXME: shouldn't we memcpy() here in a_in_buffer ?? --A'rpi
 147
 148   } else { // We have ES DS in codecdata
 149     faacDecConfigurationPtr faac_conf = faacDecGetCurrentConfiguration(faac_hdec);
 150     if (audio_output_channels <= 2) {
 151         faac_conf->downMatrix = 1;
 152         faacDecSetConfiguration(faac_hdec, faac_conf);
 153     }
 154
 155     /*int i;
 156     for(i = 0; i < sh_audio->codecdata_len; i++)
 157       printf("codecdata_dump %d: 0x%02X\n", i, sh_audio->codecdata[i]);*/
 158
 159     faac_init = faacDecInit2(faac_hdec, sh->codecdata,
 160        sh->codecdata_len,       &faac_samplerate, &faac_channels);
 161   }
 162   if(faac_init < 0) {
 163     mp_msg(MSGT_DECAUDIO,MSGL_WARN,"FAAD: Failed to initialize the decoder!\n"); // XXX: deal with cleanup!
 164     faacDecClose(faac_hdec);
 165     // XXX: free a_in_buffer here or in uninit?
 166     return 0;
 167   } else {
 168     mp_msg(MSGT_DECAUDIO,MSGL_V,"FAAD: Decoder init done (%dBytes)!\n", sh->a_in_buffer_len); // XXX: remove or move to debug!
 169     mp_msg(MSGT_DECAUDIO,MSGL_V,"FAAD: Negotiated samplerate: %ldHz  channels: %d\n", faac_samplerate, faac_channels);
 170     sh->channels = faac_channels;
 171     if (audio_output_channels <= 2) sh->channels = faac_channels > 1 ? 2 : 1;
 172     sh->samplerate = faac_samplerate;
 173     sh->samplesize=2;
 174     //sh->o_bps = sh->samplesize*faac_channels*faac_samplerate;
 175     if(!sh->i_bps) {
 176       mp_msg(MSGT_DECAUDIO,MSGL_WARN,"FAAD: compressed input bitrate missing, assuming 128kbit/s!\n");
 177       sh->i_bps = 128*1000/8; // XXX: HACK!!! ::atmos
 178     } else
 179       mp_msg(MSGT_DECAUDIO,MSGL_V,"FAAD: got %dkbit/s bitrate from MP4 header!\n",sh->i_bps*8/1000);
 180   }
 181   return 1;
 182 }
 183
 184 static void uninit(sh_audio_t *sh)
 185 {
 186   mp_msg(MSGT_DECAUDIO,MSGL_V,"FAAD: Closing decoder!\n");
 187   faacDecClose(faac_hdec);
 188 }
 189
 190 static int aac_sync(sh_audio_t *sh)
 191 {
 192   int pos = 0;
 193   if(!sh->codecdata_len) {
 194     if(sh->a_in_buffer_len < sh->a_in_buffer_size){
 195       sh->a_in_buffer_len +=
 196         demux_read_data(sh->ds,&sh->a_in_buffer[sh->a_in_buffer_len],
 197         sh->a_in_buffer_size - sh->a_in_buffer_len);
 198     }
 199     pos = aac_probe(sh->a_in_buffer, sh->a_in_buffer_len);
 200     if(pos) {
 201       sh->a_in_buffer_len -= pos;
 202       memmove(sh->a_in_buffer, &(sh->a_in_buffer[pos]), sh->a_in_buffer_len);
 203       mp_msg(MSGT_DECAUDIO,MSGL_V, "\nAAC SYNC AFTER %d bytes\n", pos);
 204     }
 205   }
 206   return pos;
 207 }
 208
 209 static int control(sh_audio_t *sh,int cmd,void* arg, ...)
 210 {
 211     switch(cmd)
 212     {
 213       case ADCTRL_RESYNC_STREAM:
 214          aac_sync(sh);
 215          return CONTROL_TRUE;
 216 #if 0
 217       case ADCTRL_SKIP_FRAME:
 218           return CONTROL_TRUE;
 219 #endif
 220     }
 221   return CONTROL_UNKNOWN;
 222 }
 223
 224 #define MAX_FAAD_ERRORS 10
 225 static int decode_audio(sh_audio_t *sh,unsigned char *buf,int minlen,int maxlen)
 226 {
 227   int len = 0, last_dec_len = 1, errors = 0;
 228   //  int j = 0;
 229   void *faac_sample_buffer;
 230
 231   while(len < minlen && last_dec_len > 0 && errors < MAX_FAAD_ERRORS) {
 232
 233     /* update buffer for raw aac streams: */
 234   if(!sh->codecdata_len)
 235     if(sh->a_in_buffer_len < sh->a_in_buffer_size){
 236       sh->a_in_buffer_len +=
 237         demux_read_data(sh->ds,&sh->a_in_buffer[sh->a_in_buffer_len],
 238         sh->a_in_buffer_size - sh->a_in_buffer_len);
 239     }
 240
 241 #ifdef DUMP_AAC_COMPRESSED
 242     {int i;
 243     for (i = 0; i < 16; i++)
 244       printf ("%02X ", sh->a_in_buffer[i]);
 245     printf ("\n");}
 246 #endif
 247
 248   if(!sh->codecdata_len){
 249    // raw aac stream:
 250    do {
 251     faac_sample_buffer = faacDecDecode(faac_hdec, &faac_finfo, sh->a_in_buffer, sh->a_in_buffer_len);
 252
 253     /* update buffer index after faacDecDecode */
 254     if(faac_finfo.bytesconsumed >= sh->a_in_buffer_len) {
 255       sh->a_in_buffer_len=0;
 256     } else {
 257       sh->a_in_buffer_len-=faac_finfo.bytesconsumed;
 258       memmove(sh->a_in_buffer,&sh->a_in_buffer[faac_finfo.bytesconsumed],sh->a_in_buffer_len);
 259     }
 260
 261     if(faac_finfo.error > 0) {
 262       mp_msg(MSGT_DECAUDIO,MSGL_WARN,"FAAD: error: %s, trying to resync!\n",
 263               faacDecGetErrorMessage(faac_finfo.error));
 264       if (sh->a_in_buffer_len <= 0) {
 265         errors = MAX_FAAD_ERRORS;
 266         break;
 267       }
 268       sh->a_in_buffer_len--;
 269       memmove(sh->a_in_buffer,&sh->a_in_buffer[1],sh->a_in_buffer_len);
 270       aac_sync(sh);
 271       errors++;
 272     } else
 273       break;
 274    } while(errors < MAX_FAAD_ERRORS);
 275   } else {
 276    // packetized (.mp4) aac stream:
 277     unsigned char* bufptr=NULL;
 278     double pts;
 279     int buflen=ds_get_packet_pts(sh->ds, &bufptr, &pts);
 280     if(buflen<=0) break;
 281     if (pts != MP_NOPTS_VALUE) {
 282         sh->pts = pts;
 283         sh->pts_bytes = 0;
 284     }
 285     faac_sample_buffer = faacDecDecode(faac_hdec, &faac_finfo, bufptr, buflen);
 286   }
 287   //for (j=0;j<faac_finfo.channels;j++) printf("%d:%d\n", j, faac_finfo.channel_position[j]);
 288
 289     if(faac_finfo.error > 0) {
 290       mp_msg(MSGT_DECAUDIO,MSGL_WARN,"FAAD: Failed to decode frame: %s \n",
 291       faacDecGetErrorMessage(faac_finfo.error));
 292     } else if (faac_finfo.samples == 0) {
 293       mp_msg(MSGT_DECAUDIO,MSGL_DBG2,"FAAD: Decoded zero samples!\n");
 294     } else {
 295       /* XXX: samples already multiplied by channels! */
 296       mp_msg(MSGT_DECAUDIO,MSGL_DBG2,"FAAD: Successfully decoded frame (%ld Bytes)!\n",
 297       sh->samplesize*faac_finfo.samples);
 298
 299       if (sh->channels >= 5)
 300         reorder_channel_copy_nch(faac_sample_buffer,
 301                                  AF_CHANNEL_LAYOUT_AAC_DEFAULT,
 302                                  buf+len, AF_CHANNEL_LAYOUT_MPLAYER_DEFAULT,
 303                                  sh->channels,
 304                                  faac_finfo.samples, sh->samplesize);
 305       else
 306       memcpy(buf+len,faac_sample_buffer, sh->samplesize*faac_finfo.samples);
 307       last_dec_len = sh->samplesize*faac_finfo.samples;
 308       len += last_dec_len;
 309       sh->pts_bytes += last_dec_len;
 310     //printf("FAAD: buffer: %d bytes  consumed: %d \n", k, faac_finfo.bytesconsumed);
 311     }
 312   }
 313   return len;
 314 }