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 #include <faad.h>
  27
  28 #include "config.h"
  29 #include "options.h"
  30 #include "ad_internal.h"
  31 #include "libaf/reorder_ch.h"
  32
  33 static const ad_info_t info =
  34 {
  35         "AAC (MPEG2/4 Advanced Audio Coding)",
  36         "faad",
  37         "Felix Buenemann",
  38         "faad2",
  39         "uses libfaad2"
  40 };
  41
  42 LIBAD_EXTERN(faad)
  43
  44 /* configure maximum supported channels, *
  45  * this is theoretically max. 64 chans   */
  46 #define FAAD_MAX_CHANNELS 8
  47 #define FAAD_BUFFLEN (FAAD_MIN_STREAMSIZE*FAAD_MAX_CHANNELS)
  48
  49 //#define AAC_DUMP_COMPRESSED
  50
  51 static faacDecHandle faac_hdec;
  52 static faacDecFrameInfo faac_finfo;
  53
  54 static int preinit(sh_audio_t *sh)
  55 {
  56   sh->audio_out_minsize=8192*FAAD_MAX_CHANNELS;
  57   sh->audio_in_minsize=FAAD_BUFFLEN;
  58   return 1;
  59 }
  60
  61 static int aac_probe(unsigned char *buffer, int len)
  62 {
  63   int i = 0, pos = 0;
  64   mp_msg(MSGT_DECAUDIO,MSGL_V, "\nAAC_PROBE: %d bytes\n", len);
  65   while(i <= len-4) {
  66     if(
  67        ((buffer[i] == 0xff) && ((buffer[i+1] & 0xf6) == 0xf0)) ||
  68        (buffer[i] == 'A' && buffer[i+1] == 'D' && buffer[i+2] == 'I' && buffer[i+3] == 'F')
  69     ) {
  70       pos = i;
  71       break;
  72     }
  73     mp_msg(MSGT_DECAUDIO,MSGL_V, "AUDIO PAYLOAD: %x %x %x %x\n", buffer[i], buffer[i+1], buffer[i+2], buffer[i+3]);
  74     i++;
  75   }
  76   mp_msg(MSGT_DECAUDIO,MSGL_V, "\nAAC_PROBE: ret %d\n", pos);
  77   return pos;
  78 }
  79
  80 static int init(sh_audio_t *sh)
  81 {
  82   struct MPOpts *opts = sh->opts;
  83   unsigned long faac_samplerate;
  84   unsigned char faac_channels;
  85   int faac_init, pos = 0;
  86   faac_hdec = faacDecOpen();
  87
  88   // If we don't get the ES descriptor, try manual config
  89   if(!sh->codecdata_len && sh->wf) {
  90     sh->codecdata_len = sh->wf->cbSize;
  91     sh->codecdata = malloc(sh->codecdata_len);
  92     memcpy(sh->codecdata, sh->wf+1, sh->codecdata_len);
  93     mp_msg(MSGT_DECAUDIO,MSGL_DBG2,"FAAD: codecdata extracted from WAVEFORMATEX\n");
  94   }
  95   if(!sh->codecdata_len || sh->format == mmioFOURCC('M', 'P', '4', 'L')) {
  96     faacDecConfigurationPtr faac_conf;
  97     /* Set the default object type and samplerate */
  98     /* This is useful for RAW AAC files */
  99     faac_conf = faacDecGetCurrentConfiguration(faac_hdec);
 100     if(sh->samplerate)
 101       faac_conf->defSampleRate = sh->samplerate;
 102     /* XXX: FAAD support FLOAT output, how do we handle
 103       * that (FAAD_FMT_FLOAT)? ::atmos
 104       */
 105     if (opts->audio_output_channels <= 2)
 106         faac_conf->downMatrix = 1;
 107       switch(sh->samplesize){
 108         case 1: // 8Bit
 109           mp_msg(MSGT_DECAUDIO,MSGL_WARN,"FAAD: 8Bit samplesize not supported by FAAD, assuming 16Bit!\n");
 110         default:
 111           sh->samplesize=2;
 112         case 2: // 16Bit
 113           faac_conf->outputFormat = FAAD_FMT_16BIT;
 114           break;
 115         case 3: // 24Bit
 116           faac_conf->outputFormat = FAAD_FMT_24BIT;
 117           break;
 118         case 4: // 32Bit
 119           faac_conf->outputFormat = FAAD_FMT_32BIT;
 120           break;
 121       }
 122     //faac_conf->defObjectType = LTP; // => MAIN, LC, SSR, LTP available.
 123
 124     faacDecSetConfiguration(faac_hdec, faac_conf);
 125
 126     sh->a_in_buffer_len = demux_read_data(sh->ds, sh->a_in_buffer, sh->a_in_buffer_size);
 127     if (!sh->a_in_buffer_len) {
 128       // faad init will crash with 0 buffer length
 129       mp_msg(MSGT_DECAUDIO, MSGL_FATAL, "Could not get audio data!\n");
 130       return 0;
 131     }
 132     /* external faad does not have latm lookup support */
 133     faac_init = faacDecInit(faac_hdec, sh->a_in_buffer,
 134                             sh->a_in_buffer_len, &faac_samplerate, &faac_channels);
 135
 136     if (faac_init < 0) {
 137     pos = aac_probe(sh->a_in_buffer, sh->a_in_buffer_len);
 138     if(pos) {
 139       sh->a_in_buffer_len -= pos;
 140       memmove(sh->a_in_buffer, &(sh->a_in_buffer[pos]), sh->a_in_buffer_len);
 141       sh->a_in_buffer_len +=
 142         demux_read_data(sh->ds,&(sh->a_in_buffer[sh->a_in_buffer_len]),
 143         sh->a_in_buffer_size - sh->a_in_buffer_len);
 144       pos = 0;
 145     }
 146
 147     /* init the codec */
 148     faac_init = faacDecInit(faac_hdec, sh->a_in_buffer,
 149           sh->a_in_buffer_len, &faac_samplerate, &faac_channels);
 150     }
 151
 152     sh->a_in_buffer_len -= (faac_init > 0)?faac_init:0; // how many bytes init consumed
 153     // XXX FIXME: shouldn't we memcpy() here in a_in_buffer ?? --A'rpi
 154
 155   } else { // We have ES DS in codecdata
 156     faacDecConfigurationPtr faac_conf = faacDecGetCurrentConfiguration(faac_hdec);
 157     if (opts->audio_output_channels <= 2) {
 158         faac_conf->downMatrix = 1;
 159         faacDecSetConfiguration(faac_hdec, faac_conf);
 160     }
 161
 162     /*int i;
 163     for(i = 0; i < sh_audio->codecdata_len; i++)
 164       printf("codecdata_dump %d: 0x%02X\n", i, sh_audio->codecdata[i]);*/
 165
 166     faac_init = faacDecInit2(faac_hdec, sh->codecdata,
 167        sh->codecdata_len,       &faac_samplerate, &faac_channels);
 168   }
 169   if(faac_init < 0) {
 170     mp_msg(MSGT_DECAUDIO,MSGL_WARN,"FAAD: Failed to initialize the decoder!\n"); // XXX: deal with cleanup!
 171     faacDecClose(faac_hdec);
 172     // XXX: free a_in_buffer here or in uninit?
 173     return 0;
 174   } else {
 175     mp_msg(MSGT_DECAUDIO,MSGL_V,"FAAD: Decoder init done (%dBytes)!\n", sh->a_in_buffer_len); // XXX: remove or move to debug!
 176     mp_msg(MSGT_DECAUDIO,MSGL_V,"FAAD: Negotiated samplerate: %ldHz  channels: %d\n", faac_samplerate, faac_channels);
 177     // 8 channels is aac channel order #7.
 178     sh->channels = faac_channels == 7 ? 8 : faac_channels;
 179     if (opts->audio_output_channels <= 2)
 180         sh->channels = faac_channels > 1 ? 2 : 1;
 181     sh->samplerate = faac_samplerate;
 182     sh->samplesize=2;
 183     //sh->o_bps = sh->samplesize*faac_channels*faac_samplerate;
 184     if(!sh->i_bps) {
 185       mp_msg(MSGT_DECAUDIO, MSGL_V, "FAAD: compressed input bitrate missing, assuming 128kbit/s!\n");
 186       sh->i_bps = 128*1000/8; // XXX: HACK!!! ::atmos
 187     } else
 188       mp_msg(MSGT_DECAUDIO,MSGL_V,"FAAD: got %dkbit/s bitrate from MP4 header!\n",sh->i_bps*8/1000);
 189   }
 190   return 1;
 191 }
 192
 193 static void uninit(sh_audio_t *sh)
 194 {
 195   mp_msg(MSGT_DECAUDIO,MSGL_V,"FAAD: Closing decoder!\n");
 196   faacDecClose(faac_hdec);
 197 }
 198
 199 static int aac_sync(sh_audio_t *sh)
 200 {
 201   int pos = 0;
 202   // do not probe LATM, faad does that
 203   if(!sh->codecdata_len && sh->format != mmioFOURCC('M', 'P', '4', 'L')) {
 204     if(sh->a_in_buffer_len < sh->a_in_buffer_size){
 205       sh->a_in_buffer_len +=
 206         demux_read_data(sh->ds,&sh->a_in_buffer[sh->a_in_buffer_len],
 207         sh->a_in_buffer_size - sh->a_in_buffer_len);
 208     }
 209     pos = aac_probe(sh->a_in_buffer, sh->a_in_buffer_len);
 210     if(pos) {
 211       sh->a_in_buffer_len -= pos;
 212       memmove(sh->a_in_buffer, &(sh->a_in_buffer[pos]), sh->a_in_buffer_len);
 213       mp_msg(MSGT_DECAUDIO,MSGL_V, "\nAAC SYNC AFTER %d bytes\n", pos);
 214     }
 215   }
 216   return pos;
 217 }
 218
 219 static int control(sh_audio_t *sh,int cmd,void* arg, ...)
 220 {
 221     switch(cmd)
 222     {
 223       case ADCTRL_RESYNC_STREAM:
 224          aac_sync(sh);
 225          return CONTROL_TRUE;
 226 #if 0
 227       case ADCTRL_SKIP_FRAME:
 228           return CONTROL_TRUE;
 229 #endif
 230     }
 231   return CONTROL_UNKNOWN;
 232 }
 233
 234 #define MAX_FAAD_ERRORS 10
 235 static int decode_audio(sh_audio_t *sh,unsigned char *buf,int minlen,int maxlen)
 236 {
 237   int len = 0, last_dec_len = 1, errors = 0;
 238   //  int j = 0;
 239   void *faac_sample_buffer;
 240
 241   while(len < minlen && last_dec_len > 0 && errors < MAX_FAAD_ERRORS) {
 242
 243     /* update buffer for raw aac streams: */
 244   if(!sh->codecdata_len)
 245     if(sh->a_in_buffer_len < sh->a_in_buffer_size){
 246       sh->a_in_buffer_len +=
 247         demux_read_data(sh->ds,&sh->a_in_buffer[sh->a_in_buffer_len],
 248         sh->a_in_buffer_size - sh->a_in_buffer_len);
 249     }
 250
 251 #ifdef DUMP_AAC_COMPRESSED
 252     {int i;
 253     for (i = 0; i < 16; i++)
 254       printf ("%02X ", sh->a_in_buffer[i]);
 255     printf ("\n");}
 256 #endif
 257
 258   if(!sh->codecdata_len){
 259    // raw aac stream:
 260    do {
 261     faac_sample_buffer = faacDecDecode(faac_hdec, &faac_finfo, sh->a_in_buffer, sh->a_in_buffer_len);
 262
 263     /* update buffer index after faacDecDecode */
 264     if(faac_finfo.bytesconsumed >= sh->a_in_buffer_len) {
 265       sh->a_in_buffer_len=0;
 266     } else {
 267       sh->a_in_buffer_len-=faac_finfo.bytesconsumed;
 268       memmove(sh->a_in_buffer,&sh->a_in_buffer[faac_finfo.bytesconsumed],sh->a_in_buffer_len);
 269     }
 270
 271     if(faac_finfo.error > 0) {
 272       mp_msg(MSGT_DECAUDIO,MSGL_WARN,"FAAD: error: %s, trying to resync!\n",
 273               faacDecGetErrorMessage(faac_finfo.error));
 274       if (sh->a_in_buffer_len <= 0) {
 275         errors = MAX_FAAD_ERRORS;
 276         break;
 277       }
 278       sh->a_in_buffer_len--;
 279       memmove(sh->a_in_buffer,&sh->a_in_buffer[1],sh->a_in_buffer_len);
 280       aac_sync(sh);
 281       errors++;
 282     } else
 283       break;
 284    } while(errors < MAX_FAAD_ERRORS);
 285   } else {
 286    // packetized (.mp4) aac stream:
 287     unsigned char* bufptr=NULL;
 288     double pts;
 289     int buflen=ds_get_packet_pts(sh->ds, &bufptr, &pts);
 290     if(buflen<=0) break;
 291     if (pts != MP_NOPTS_VALUE) {
 292         sh->pts = pts;
 293         sh->pts_bytes = 0;
 294     }
 295     faac_sample_buffer = faacDecDecode(faac_hdec, &faac_finfo, bufptr, buflen);
 296   }
 297   //for (j=0;j<faac_finfo.channels;j++) printf("%d:%d\n", j, faac_finfo.channel_position[j]);
 298
 299     if(faac_finfo.error > 0) {
 300       mp_msg(MSGT_DECAUDIO,MSGL_WARN,"FAAD: Failed to decode frame: %s \n",
 301       faacDecGetErrorMessage(faac_finfo.error));
 302     } else if (faac_finfo.samples == 0) {
 303       mp_msg(MSGT_DECAUDIO,MSGL_DBG2,"FAAD: Decoded zero samples!\n");
 304     } else {
 305       /* XXX: samples already multiplied by channels! */
 306       mp_msg(MSGT_DECAUDIO,MSGL_DBG2,"FAAD: Successfully decoded frame (%ld Bytes)!\n",
 307       sh->samplesize*faac_finfo.samples);
 308
 309       if (sh->channels >= 5)
 310         reorder_channel_copy_nch(faac_sample_buffer,
 311                                  AF_CHANNEL_LAYOUT_AAC_DEFAULT,
 312                                  buf+len, AF_CHANNEL_LAYOUT_MPLAYER_DEFAULT,
 313                                  sh->channels,
 314                                  faac_finfo.samples, sh->samplesize);
 315       else
 316       memcpy(buf+len,faac_sample_buffer, sh->samplesize*faac_finfo.samples);
 317       last_dec_len = sh->samplesize*faac_finfo.samples;
 318       len += last_dec_len;
 319       sh->pts_bytes += last_dec_len;
 320     //printf("FAAD: buffer: %d bytes  consumed: %d \n", k, faac_finfo.bytesconsumed);
 321     }
 322   }
 323   return len;
 324 }