libmpcodecs/ad_faad.c

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