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 const 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 8
  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     faacDecConfigurationPtr faac_conf;
 100     /* Set the default object type and samplerate */
 101     /* This is useful for RAW AAC files */
 102     faac_conf = faacDecGetCurrentConfiguration(faac_hdec);
 103     if(sh->samplerate)
 104       faac_conf->defSampleRate = sh->samplerate;
 105     /* XXX: FAAD support FLOAT output, how do we handle
 106       * that (FAAD_FMT_FLOAT)? ::atmos
 107       */
 108     if (audio_output_channels <= 2) faac_conf->downMatrix = 1;
 109       switch(sh->samplesize){
 110         case 1: // 8Bit
 111           mp_msg(MSGT_DECAUDIO,MSGL_WARN,"FAAD: 8Bit samplesize not supported by FAAD, assuming 16Bit!\n");
 112         default:
 113           sh->samplesize=2;
 114         case 2: // 16Bit
 115           faac_conf->outputFormat = FAAD_FMT_16BIT;
 116           break;
 117         case 3: // 24Bit
 118           faac_conf->outputFormat = FAAD_FMT_24BIT;
 119           break;
 120         case 4: // 32Bit
 121           faac_conf->outputFormat = FAAD_FMT_32BIT;
 122           break;
 123       }
 124     //faac_conf->defObjectType = LTP; // => MAIN, LC, SSR, LTP available.
 125
 126     faacDecSetConfiguration(faac_hdec, faac_conf);
 127
 128     sh->a_in_buffer_len = demux_read_data(sh->ds, sh->a_in_buffer, sh->a_in_buffer_size);
 129     pos = aac_probe(sh->a_in_buffer, sh->a_in_buffer_len);
 130     if(pos) {
 131       sh->a_in_buffer_len -= pos;
 132       memmove(sh->a_in_buffer, &(sh->a_in_buffer[pos]), sh->a_in_buffer_len);
 133       sh->a_in_buffer_len +=
 134         demux_read_data(sh->ds,&(sh->a_in_buffer[sh->a_in_buffer_len]),
 135         sh->a_in_buffer_size - sh->a_in_buffer_len);
 136       pos = 0;
 137     }
 138
 139     /* init the codec */
 140     faac_init = faacDecInit(faac_hdec, sh->a_in_buffer,
 141        sh->a_in_buffer_len, &faac_samplerate, &faac_channels);
 142
 143     sh->a_in_buffer_len -= (faac_init > 0)?faac_init:0; // how many bytes init consumed
 144     // XXX FIXME: shouldn't we memcpy() here in a_in_buffer ?? --A'rpi
 145
 146   } else { // We have ES DS in codecdata
 147     faacDecConfigurationPtr faac_conf = faacDecGetCurrentConfiguration(faac_hdec);
 148     if (audio_output_channels <= 2) {
 149         faac_conf->downMatrix = 1;
 150         faacDecSetConfiguration(faac_hdec, faac_conf);
 151     }
 152
 153     /*int i;
 154     for(i = 0; i < sh_audio->codecdata_len; i++)
 155       printf("codecdata_dump %d: 0x%02X\n", i, sh_audio->codecdata[i]);*/
 156
 157     faac_init = faacDecInit2(faac_hdec, sh->codecdata,
 158        sh->codecdata_len,       &faac_samplerate, &faac_channels);
 159   }
 160   if(faac_init < 0) {
 161     mp_msg(MSGT_DECAUDIO,MSGL_WARN,"FAAD: Failed to initialize the decoder!\n"); // XXX: deal with cleanup!
 162     faacDecClose(faac_hdec);
 163     // XXX: free a_in_buffer here or in uninit?
 164     return 0;
 165   } else {
 166     mp_msg(MSGT_DECAUDIO,MSGL_V,"FAAD: Decoder init done (%dBytes)!\n", sh->a_in_buffer_len); // XXX: remove or move to debug!
 167     mp_msg(MSGT_DECAUDIO,MSGL_V,"FAAD: Negotiated samplerate: %ldHz  channels: %d\n", faac_samplerate, faac_channels);
 168     // 8 channels is aac channel order #7.
 169     sh->channels = faac_channels == 7 ? 8 : faac_channels;
 170     if (audio_output_channels <= 2) sh->channels = faac_channels > 1 ? 2 : 1;
 171     sh->samplerate = faac_samplerate;
 172     sh->samplesize=2;
 173     //sh->o_bps = sh->samplesize*faac_channels*faac_samplerate;
 174     if(!sh->i_bps) {
 175       mp_msg(MSGT_DECAUDIO, MSGL_V, "FAAD: compressed input bitrate missing, assuming 128kbit/s!\n");
 176       sh->i_bps = 128*1000/8; // XXX: HACK!!! ::atmos
 177     } else
 178       mp_msg(MSGT_DECAUDIO,MSGL_V,"FAAD: got %dkbit/s bitrate from MP4 header!\n",sh->i_bps*8/1000);
 179   }
 180   return 1;
 181 }
 182
 183 static void uninit(sh_audio_t *sh)
 184 {
 185   mp_msg(MSGT_DECAUDIO,MSGL_V,"FAAD: Closing decoder!\n");
 186   faacDecClose(faac_hdec);
 187 }
 188
 189 static int aac_sync(sh_audio_t *sh)
 190 {
 191   int pos = 0;
 192   if(!sh->codecdata_len) {
 193     if(sh->a_in_buffer_len < sh->a_in_buffer_size){
 194       sh->a_in_buffer_len +=
 195         demux_read_data(sh->ds,&sh->a_in_buffer[sh->a_in_buffer_len],
 196         sh->a_in_buffer_size - sh->a_in_buffer_len);
 197     }
 198     pos = aac_probe(sh->a_in_buffer, sh->a_in_buffer_len);
 199     if(pos) {
 200       sh->a_in_buffer_len -= pos;
 201       memmove(sh->a_in_buffer, &(sh->a_in_buffer[pos]), sh->a_in_buffer_len);
 202       mp_msg(MSGT_DECAUDIO,MSGL_V, "\nAAC SYNC AFTER %d bytes\n", pos);
 203     }
 204   }
 205   return pos;
 206 }
 207
 208 static int control(sh_audio_t *sh,int cmd,void* arg, ...)
 209 {
 210     switch(cmd)
 211     {
 212       case ADCTRL_RESYNC_STREAM:
 213          aac_sync(sh);
 214          return CONTROL_TRUE;
 215 #if 0
 216       case ADCTRL_SKIP_FRAME:
 217           return CONTROL_TRUE;
 218 #endif
 219     }
 220   return CONTROL_UNKNOWN;
 221 }
 222
 223 #define MAX_FAAD_ERRORS 10
 224 static int decode_audio(sh_audio_t *sh,unsigned char *buf,int minlen,int maxlen)
 225 {
 226   int len = 0, last_dec_len = 1, errors = 0;
 227   //  int j = 0;
 228   void *faac_sample_buffer;
 229
 230   while(len < minlen && last_dec_len > 0 && errors < MAX_FAAD_ERRORS) {
 231
 232     /* update buffer for raw aac streams: */
 233   if(!sh->codecdata_len)
 234     if(sh->a_in_buffer_len < sh->a_in_buffer_size){
 235       sh->a_in_buffer_len +=
 236         demux_read_data(sh->ds,&sh->a_in_buffer[sh->a_in_buffer_len],
 237         sh->a_in_buffer_size - sh->a_in_buffer_len);
 238     }
 239
 240 #ifdef DUMP_AAC_COMPRESSED
 241     {int i;
 242     for (i = 0; i < 16; i++)
 243       printf ("%02X ", sh->a_in_buffer[i]);
 244     printf ("\n");}
 245 #endif
 246
 247   if(!sh->codecdata_len){
 248    // raw aac stream:
 249    do {
 250     faac_sample_buffer = faacDecDecode(faac_hdec, &faac_finfo, sh->a_in_buffer, sh->a_in_buffer_len);
 251
 252     /* update buffer index after faacDecDecode */
 253     if(faac_finfo.bytesconsumed >= sh->a_in_buffer_len) {
 254       sh->a_in_buffer_len=0;
 255     } else {
 256       sh->a_in_buffer_len-=faac_finfo.bytesconsumed;
 257       memmove(sh->a_in_buffer,&sh->a_in_buffer[faac_finfo.bytesconsumed],sh->a_in_buffer_len);
 258     }
 259
 260     if(faac_finfo.error > 0) {
 261       mp_msg(MSGT_DECAUDIO,MSGL_WARN,"FAAD: error: %s, trying to resync!\n",
 262               faacDecGetErrorMessage(faac_finfo.error));
 263       if (sh->a_in_buffer_len <= 0) {
 264         errors = MAX_FAAD_ERRORS;
 265         break;
 266       }
 267       sh->a_in_buffer_len--;
 268       memmove(sh->a_in_buffer,&sh->a_in_buffer[1],sh->a_in_buffer_len);
 269       aac_sync(sh);
 270       errors++;
 271     } else
 272       break;
 273    } while(errors < MAX_FAAD_ERRORS);
 274   } else {
 275    // packetized (.mp4) aac stream:
 276     unsigned char* bufptr=NULL;
 277     double pts;
 278     int buflen=ds_get_packet_pts(sh->ds, &bufptr, &pts);
 279     if(buflen<=0) break;
 280     if (pts != MP_NOPTS_VALUE) {
 281         sh->pts = pts;
 282         sh->pts_bytes = 0;
 283     }
 284     faac_sample_buffer = faacDecDecode(faac_hdec, &faac_finfo, bufptr, buflen);
 285   }
 286   //for (j=0;j<faac_finfo.channels;j++) printf("%d:%d\n", j, faac_finfo.channel_position[j]);
 287
 288     if(faac_finfo.error > 0) {
 289       mp_msg(MSGT_DECAUDIO,MSGL_WARN,"FAAD: Failed to decode frame: %s \n",
 290       faacDecGetErrorMessage(faac_finfo.error));
 291     } else if (faac_finfo.samples == 0) {
 292       mp_msg(MSGT_DECAUDIO,MSGL_DBG2,"FAAD: Decoded zero samples!\n");
 293     } else {
 294       /* XXX: samples already multiplied by channels! */
 295       mp_msg(MSGT_DECAUDIO,MSGL_DBG2,"FAAD: Successfully decoded frame (%ld Bytes)!\n",
 296       sh->samplesize*faac_finfo.samples);
 297
 298       if (sh->channels >= 5)
 299         reorder_channel_copy_nch(faac_sample_buffer,
 300                                  AF_CHANNEL_LAYOUT_AAC_DEFAULT,
 301                                  buf+len, AF_CHANNEL_LAYOUT_MPLAYER_DEFAULT,
 302                                  sh->channels,
 303                                  faac_finfo.samples, sh->samplesize);
 304       else
 305       memcpy(buf+len,faac_sample_buffer, sh->samplesize*faac_finfo.samples);
 306       last_dec_len = sh->samplesize*faac_finfo.samples;
 307       len += last_dec_len;
 308       sh->pts_bytes += last_dec_len;
 309     //printf("FAAD: buffer: %d bytes  consumed: %d \n", k, faac_finfo.bytesconsumed);
 310     }
 311   }
 312   return len;
 313 }