git.sesse.net Git - ffmpeg/blob - libavcodec/faad.c

   1 /*
   2  * Faad decoder
   3  * Copyright (c) 2003 Zdenek Kabelac.
   4  * Copyright (c) 2004 Thomas Raivio.
   5  *
   6  * This library is free software; you can redistribute it and/or
   7  * modify it under the terms of the GNU Lesser General Public
   8  * License as published by the Free Software Foundation; either
   9  * version 2 of the License, or (at your option) any later version.
  10  *
  11  * This library is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14  * Lesser General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU Lesser General Public
  17  * License along with this library; if not, write to the Free Software
  18  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  19  */
  20
  21 /**
  22  * @file faad.c
  23  * AAC decoder.
  24  *
  25  * still a bit unfinished - but it plays something
  26  */
  27
  28 #include "avcodec.h"
  29 #include "faad.h"
  30
  31 #ifndef FAADAPI
  32 #define FAADAPI
  33 #endif
  34
  35 /*
  36  * when CONFIG_FAADBIN is defined the libfaad will be opened at runtime
  37  */
  38 //#undef CONFIG_FAADBIN
  39 //#define CONFIG_FAADBIN
  40
  41 #ifdef CONFIG_FAADBIN
  42 #include <dlfcn.h>
  43 static const char* libfaadname = "libfaad.so.0";
  44 #else
  45 #define dlopen(a)
  46 #define dlclose(a)
  47 #endif
  48
  49 typedef struct {
  50     void* handle;               /* dlopen handle */
  51     void* faac_handle;          /* FAAD library handle */
  52     int frame_size;
  53     int sample_size;
  54     int flags;
  55
  56     /* faad calls */
  57     faacDecHandle FAADAPI (*faacDecOpen)(void);
  58     faacDecConfigurationPtr FAADAPI (*faacDecGetCurrentConfiguration)(faacDecHandle hDecoder);
  59 #ifndef FAAD2_VERSION
  60         int FAADAPI (*faacDecSetConfiguration)(faacDecHandle hDecoder,
  61                                            faacDecConfigurationPtr config);
  62         int FAADAPI (*faacDecInit)(faacDecHandle hDecoder,
  63                                 unsigned char *buffer,
  64                                 unsigned long *samplerate,
  65                                 unsigned long *channels);
  66         int FAADAPI (*faacDecInit2)(faacDecHandle hDecoder, unsigned char *pBuffer,
  67                                 unsigned long SizeOfDecoderSpecificInfo,
  68                                 unsigned long *samplerate, unsigned long *channels);
  69         int FAADAPI (*faacDecDecode)(faacDecHandle hDecoder,
  70                                 unsigned char *buffer,
  71                                 unsigned long *bytesconsumed,
  72                                 short *sample_buffer,
  73                                 unsigned long *samples);
  74 #else
  75         unsigned char FAADAPI (*faacDecSetConfiguration)(faacDecHandle hDecoder,
  76                                                      faacDecConfigurationPtr config);
  77         long FAADAPI (*faacDecInit)(faacDecHandle hDecoder,
  78                                  unsigned char *buffer,
  79                                  unsigned long buffer_size,
  80                                  unsigned long *samplerate,
  81                                  unsigned char *channels);
  82         char FAADAPI (*faacDecInit2)(faacDecHandle hDecoder, unsigned char *pBuffer,
  83                                  unsigned long SizeOfDecoderSpecificInfo,
  84                                  unsigned long *samplerate, unsigned char *channels);
  85         void *FAADAPI (*faacDecDecode)(faacDecHandle hDecoder,
  86                                          faacDecFrameInfo *hInfo,
  87                                          unsigned char *buffer,
  88                                                                  unsigned long buffer_size);
  89         unsigned char* FAADAPI (*faacDecGetErrorMessage)(unsigned char errcode);
  90 #endif
  91
  92     void FAADAPI (*faacDecClose)(faacDecHandle hDecoder);
  93
  94
  95 } FAACContext;
  96
  97 static const unsigned long faac_srates[] =
  98 {
  99     96000, 88200, 64000, 48000, 44100, 32000,
 100     24000, 22050, 16000, 12000, 11025, 8000
 101 };
 102
 103 static int faac_init_mp4(AVCodecContext *avctx)
 104 {
 105     FAACContext *s = (FAACContext *) avctx->priv_data;
 106     unsigned long samplerate;
 107 #ifndef FAAD2_VERSION
 108     unsigned long channels;
 109 #else
 110     unsigned char channels;
 111 #endif
 112     int r = 0;
 113
 114     if (avctx->extradata)
 115         r = s->faacDecInit2(s->faac_handle, (uint8_t*) avctx->extradata,
 116                             avctx->extradata_size,
 117                             &samplerate, &channels);
 118     // else r = s->faacDecInit(s->faac_handle ... );
 119
 120     if (r < 0)
 121         av_log(avctx, AV_LOG_ERROR, "faacDecInit2 failed r:%d   sr:%ld  ch:%ld  s:%d\n",
 122                 r, samplerate, (long)channels, avctx->extradata_size);
 123     avctx->sample_rate = samplerate;
 124     avctx->channels = channels;
 125
 126     return r;
 127 }
 128
 129 static int faac_init_aac(AVCodecContext *avctx)
 130 {
 131     return 0;
 132 }
 133
 134 static int faac_decode_frame(AVCodecContext *avctx,
 135                              void *data, int *data_size,
 136                              uint8_t *buf, int buf_size)
 137 {
 138     FAACContext *s = (FAACContext *) avctx->priv_data;
 139 #ifndef FAAD2_VERSION
 140     unsigned long bytesconsumed;
 141     short *sample_buffer = NULL;
 142     unsigned long samples;
 143     int out;
 144 #else
 145     faacDecFrameInfo frame_info;
 146     void *out;
 147 #endif
 148     if(buf_size == 0)
 149         return 0;
 150 #ifndef FAAD2_VERSION
 151     out = s->faacDecDecode(s->faac_handle,
 152                            (unsigned char*)buf,
 153                            &bytesconsumed,
 154                            data,
 155                            &samples);
 156     samples *= s->sample_size;
 157     if (data_size)
 158         *data_size = samples;
 159     return (buf_size < (int)bytesconsumed)
 160         ? buf_size : (int)bytesconsumed;
 161 #else
 162
 163     out = s->faacDecDecode(s->faac_handle, &frame_info, (unsigned char*)buf, (unsigned long)buf_size);
 164
 165     if (frame_info.error > 0) {
 166         av_log(avctx, AV_LOG_ERROR, "faac: frame decodinf failed: %s\n",
 167                 s->faacDecGetErrorMessage(frame_info.error));
 168         return 0;
 169     }
 170
 171     frame_info.samples *= s->sample_size;
 172     memcpy(data, out, frame_info.samples); // CHECKME - can we cheat this one
 173
 174     if (data_size)
 175         *data_size = frame_info.samples;
 176
 177     return (buf_size < (int)frame_info.bytesconsumed)
 178         ? buf_size : (int)frame_info.bytesconsumed;
 179 #endif
 180 }
 181
 182 static int faac_decode_end(AVCodecContext *avctx)
 183 {
 184     FAACContext *s = (FAACContext *) avctx->priv_data;
 185
 186     if (s->faacDecClose)
 187         s->faacDecClose(s->faac_handle);
 188
 189     dlclose(s->handle);
 190     return 0;
 191 }
 192
 193 static int faac_decode_init(AVCodecContext *avctx)
 194 {
 195     FAACContext *s = (FAACContext *) avctx->priv_data;
 196     faacDecConfigurationPtr faac_cfg;
 197
 198 #ifdef CONFIG_FAADBIN
 199     const char* err = 0;
 200
 201     s->handle = dlopen(libfaadname, RTLD_LAZY);
 202     if (!s->handle)
 203     {
 204         av_log(avctx, AV_LOG_ERROR, "FAAD library: %s could not be opened! \n%s\n",
 205                 libfaadname, dlerror());
 206         return -1;
 207     }
 208 #define dfaac(a, b) \
 209     do { static const char* n = "faacDec" #a; \
 210     if ((s->faacDec ## a = b dlsym( s->handle, n )) == NULL) { err = n; break; } } while(0)
 211     for(;;) {
 212 #else  /* !CONFIG_FAADBIN */
 213 #define dfaac(a, b)     s->faacDec ## a = faacDec ## a
 214 #endif /* CONFIG_FAADBIN */
 215
 216         // resolve all needed function calls
 217         dfaac(Open, (faacDecHandle FAADAPI (*)(void)));
 218         dfaac(GetCurrentConfiguration, (faacDecConfigurationPtr
 219                                         FAADAPI (*)(faacDecHandle)));
 220 #ifndef FAAD2_VERSION
 221         dfaac(SetConfiguration, (int FAADAPI (*)(faacDecHandle,
 222                                                            faacDecConfigurationPtr)));
 223
 224         dfaac(Init, (int FAADAPI (*)(faacDecHandle, unsigned char*,
 225                                      unsigned long*, unsigned long*)));
 226     dfaac(Init2, (int FAADAPI (*)(faacDecHandle, unsigned char*,
 227                                        unsigned long, unsigned long*,
 228                                        unsigned long*)));
 229     dfaac(Close, (void FAADAPI (*)(faacDecHandle hDecoder)));
 230         dfaac(Decode, (int FAADAPI (*)(faacDecHandle, unsigned char*,
 231                              unsigned long*, short*, unsigned long*)));
 232 #else
 233         dfaac(SetConfiguration, (unsigned char FAADAPI (*)(faacDecHandle,
 234                                                            faacDecConfigurationPtr)));
 235         dfaac(Init, (long FAADAPI (*)(faacDecHandle, unsigned char*,
 236                                      unsigned long, unsigned long*, unsigned char*)));
 237         dfaac(Init2, (char FAADAPI (*)(faacDecHandle, unsigned char*,
 238                                        unsigned long, unsigned long*,
 239                                        unsigned char*)));
 240         dfaac(Decode, (void *FAADAPI (*)(faacDecHandle, faacDecFrameInfo*,
 241                              unsigned char*, unsigned long)));
 242         dfaac(GetErrorMessage, (unsigned char* FAADAPI (*)(unsigned char)));
 243 #endif
 244 #undef dfacc
 245
 246 #ifdef CONFIG_FAADBIN
 247         break;
 248     }
 249     if (err) {
 250         dlclose(s->handle);
 251         av_log(avctx, AV_LOG_ERROR, "FAAD library: cannot resolve %s in %s!\n",
 252                 err, libfaadname);
 253         return -1;
 254     }
 255 #endif
 256
 257     s->faac_handle = s->faacDecOpen();
 258     if (!s->faac_handle) {
 259         av_log(avctx, AV_LOG_ERROR, "FAAD library: cannot create handler!\n");
 260         faac_decode_end(avctx);
 261         return -1;
 262     }
 263
 264
 265     faac_cfg = s->faacDecGetCurrentConfiguration(s->faac_handle);
 266
 267     if (faac_cfg) {
 268         switch (avctx->bits_per_sample) {
 269         case 8: av_log(avctx, AV_LOG_ERROR, "FAADlib unsupported bps %d\n", avctx->bits_per_sample); break;
 270         default:
 271         case 16:
 272 #ifdef FAAD2_VERSION
 273             faac_cfg->outputFormat = FAAD_FMT_16BIT;
 274 #endif
 275             s->sample_size = 2;
 276             break;
 277         case 24:
 278 #ifdef FAAD2_VERSION
 279             faac_cfg->outputFormat = FAAD_FMT_24BIT;
 280 #endif
 281             s->sample_size = 3;
 282             break;
 283         case 32:
 284 #ifdef FAAD2_VERSION
 285             faac_cfg->outputFormat = FAAD_FMT_32BIT;
 286 #endif
 287             s->sample_size = 4;
 288             break;
 289         }
 290
 291         faac_cfg->defSampleRate = (!avctx->sample_rate) ? 44100 : avctx->sample_rate;
 292         faac_cfg->defObjectType = LC;
 293     }
 294
 295     s->faacDecSetConfiguration(s->faac_handle, faac_cfg);
 296
 297     faac_init_mp4(avctx);
 298
 299     return 0;
 300 }
 301
 302 #define AAC_CODEC(id, name)     \
 303 AVCodec name ## _decoder = {    \
 304     #name,                      \
 305     CODEC_TYPE_AUDIO,           \
 306     id,                         \
 307     sizeof(FAACContext),        \
 308     faac_decode_init,           \
 309     NULL,                       \
 310     faac_decode_end,            \
 311     faac_decode_frame,          \
 312 }
 313
 314 // FIXME - raw AAC files - maybe just one entry will be enough
 315 AAC_CODEC(CODEC_ID_AAC, aac);
 316 // If it's mp4 file - usually embeded into Qt Mov
 317 AAC_CODEC(CODEC_ID_MPEG4AAC, mpeg4aac);
 318
 319 #undef AAC_CODEC