LCOV - code coverage report
Current view: top level - src/libavformat - aiffdec.c (source / functions) Hit Total Coverage
Test: coverage.info Lines: 129 219 58.9 %
Date: 2017-01-22 19:06:18 Functions: 7 7 100.0 %

          Line data    Source code
       1             : /*
       2             :  * AIFF/AIFF-C demuxer
       3             :  * Copyright (c) 2006  Patrick Guimond
       4             :  *
       5             :  * This file is part of FFmpeg.
       6             :  *
       7             :  * FFmpeg is free software; you can redistribute it and/or
       8             :  * modify it under the terms of the GNU Lesser General Public
       9             :  * License as published by the Free Software Foundation; either
      10             :  * version 2.1 of the License, or (at your option) any later version.
      11             :  *
      12             :  * FFmpeg is distributed in the hope that it will be useful,
      13             :  * but WITHOUT ANY WARRANTY; without even the implied warranty of
      14             :  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
      15             :  * Lesser General Public License for more details.
      16             :  *
      17             :  * You should have received a copy of the GNU Lesser General Public
      18             :  * License along with FFmpeg; if not, write to the Free Software
      19             :  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
      20             :  */
      21             : 
      22             : #include "libavutil/intreadwrite.h"
      23             : #include "libavutil/mathematics.h"
      24             : #include "libavutil/dict.h"
      25             : #include "avformat.h"
      26             : #include "internal.h"
      27             : #include "pcm.h"
      28             : #include "aiff.h"
      29             : #include "isom.h"
      30             : #include "id3v2.h"
      31             : #include "mov_chan.h"
      32             : 
      33             : #define AIFF                    0
      34             : #define AIFF_C_VERSION1         0xA2805140
      35             : 
      36             : typedef struct AIFFInputContext {
      37             :     int64_t data_end;
      38             :     int block_duration;
      39             : } AIFFInputContext;
      40             : 
      41           2 : static enum AVCodecID aiff_codec_get_id(int bps)
      42             : {
      43           2 :     if (bps <= 8)
      44           0 :         return AV_CODEC_ID_PCM_S8;
      45           2 :     if (bps <= 16)
      46           2 :         return AV_CODEC_ID_PCM_S16BE;
      47           0 :     if (bps <= 24)
      48           0 :         return AV_CODEC_ID_PCM_S24BE;
      49           0 :     if (bps <= 32)
      50           0 :         return AV_CODEC_ID_PCM_S32BE;
      51             : 
      52             :     /* bigger than 32 isn't allowed  */
      53           0 :     return AV_CODEC_ID_NONE;
      54             : }
      55             : 
      56             : /* returns the size of the found tag */
      57          24 : static int get_tag(AVIOContext *pb, uint32_t * tag)
      58             : {
      59             :     int size;
      60             : 
      61          24 :     if (avio_feof(pb))
      62           0 :         return AVERROR(EIO);
      63             : 
      64          24 :     *tag = avio_rl32(pb);
      65          24 :     size = avio_rb32(pb);
      66             : 
      67          24 :     if (size < 0)
      68           0 :         size = 0x7fffffff;
      69             : 
      70          24 :     return size;
      71             : }
      72             : 
      73             : /* Metadata string read */
      74           2 : static void get_meta(AVFormatContext *s, const char *key, int size)
      75             : {
      76           2 :     uint8_t *str = av_malloc(size+1);
      77             : 
      78           2 :     if (str) {
      79           2 :         int res = avio_read(s->pb, str, size);
      80           2 :         if (res < 0){
      81           0 :             av_free(str);
      82           0 :             return;
      83             :         }
      84           2 :         size += (size&1)-res;
      85           2 :         str[res] = 0;
      86           2 :         av_dict_set(&s->metadata, key, str, AV_DICT_DONT_STRDUP_VAL);
      87             :     }else
      88           0 :         size+= size&1;
      89             : 
      90           2 :     avio_skip(s->pb, size);
      91             : }
      92             : 
      93             : /* Returns the number of sound data frames or negative on error */
      94           6 : static int get_aiff_header(AVFormatContext *s, int size,
      95             :                                     unsigned version)
      96             : {
      97           6 :     AVIOContext *pb        = s->pb;
      98           6 :     AVCodecParameters *par = s->streams[0]->codecpar;
      99           6 :     AIFFInputContext *aiff = s->priv_data;
     100             :     int exp;
     101             :     uint64_t val;
     102             :     int sample_rate;
     103             :     unsigned int num_frames;
     104             : 
     105           6 :     if (size & 1)
     106           0 :         size++;
     107           6 :     par->codec_type = AVMEDIA_TYPE_AUDIO;
     108           6 :     par->channels = avio_rb16(pb);
     109           6 :     num_frames = avio_rb32(pb);
     110           6 :     par->bits_per_coded_sample = avio_rb16(pb);
     111             : 
     112           6 :     exp = avio_rb16(pb) - 16383 - 63;
     113           6 :     val = avio_rb64(pb);
     114           6 :     if (exp <-63 || exp >63) {
     115           0 :         av_log(s, AV_LOG_ERROR, "exp %d is out of range\n", exp);
     116           0 :         return AVERROR_INVALIDDATA;
     117             :     }
     118           6 :     if (exp >= 0)
     119           0 :         sample_rate = val << exp;
     120             :     else
     121           6 :         sample_rate = (val + (1ULL<<(-exp-1))) >> -exp;
     122           6 :     par->sample_rate = sample_rate;
     123           6 :     size -= 18;
     124             : 
     125             :     /* get codec id for AIFF-C */
     126           6 :     if (size < 4) {
     127           2 :         version = AIFF;
     128           4 :     } else if (version == AIFF_C_VERSION1) {
     129           4 :         par->codec_tag = avio_rl32(pb);
     130           4 :         par->codec_id  = ff_codec_get_id(ff_codec_aiff_tags, par->codec_tag);
     131           4 :         if (par->codec_id == AV_CODEC_ID_NONE) {
     132             :             char tag[32];
     133           0 :             av_get_codec_tag_string(tag, sizeof(tag), par->codec_tag);
     134           0 :             avpriv_request_sample(s, "unknown or unsupported codec tag: %s", tag);
     135             :         }
     136           4 :         size -= 4;
     137             :     }
     138             : 
     139           6 :     if (version != AIFF_C_VERSION1 || par->codec_id == AV_CODEC_ID_PCM_S16BE) {
     140           2 :         par->codec_id = aiff_codec_get_id(par->bits_per_coded_sample);
     141           2 :         par->bits_per_coded_sample = av_get_bits_per_sample(par->codec_id);
     142           2 :         aiff->block_duration = 1;
     143             :     } else {
     144           4 :         switch (par->codec_id) {
     145             :         case AV_CODEC_ID_PCM_F32BE:
     146             :         case AV_CODEC_ID_PCM_F64BE:
     147             :         case AV_CODEC_ID_PCM_S16LE:
     148             :         case AV_CODEC_ID_PCM_ALAW:
     149             :         case AV_CODEC_ID_PCM_MULAW:
     150           0 :             aiff->block_duration = 1;
     151           0 :             break;
     152             :         case AV_CODEC_ID_ADPCM_IMA_QT:
     153           4 :             par->block_align = 34 * par->channels;
     154           4 :             break;
     155             :         case AV_CODEC_ID_MACE3:
     156           0 :             par->block_align = 2 * par->channels;
     157           0 :             break;
     158             :         case AV_CODEC_ID_ADPCM_G726LE:
     159           0 :             par->bits_per_coded_sample = 5;
     160             :         case AV_CODEC_ID_ADPCM_IMA_WS:
     161             :         case AV_CODEC_ID_ADPCM_G722:
     162             :         case AV_CODEC_ID_MACE6:
     163             :         case AV_CODEC_ID_SDX2_DPCM:
     164           0 :             par->block_align = 1 * par->channels;
     165           0 :             break;
     166             :         case AV_CODEC_ID_GSM:
     167           0 :             par->block_align = 33;
     168           0 :             break;
     169             :         default:
     170           0 :             aiff->block_duration = 1;
     171           0 :             break;
     172             :         }
     173           4 :         if (par->block_align > 0)
     174           4 :             aiff->block_duration = av_get_audio_frame_duration2(par,
     175             :                                                                 par->block_align);
     176             :     }
     177             : 
     178             :     /* Block align needs to be computed in all cases, as the definition
     179             :      * is specific to applications -> here we use the WAVE format definition */
     180           6 :     if (!par->block_align)
     181           2 :         par->block_align = (av_get_bits_per_sample(par->codec_id) * par->channels) >> 3;
     182             : 
     183           6 :     if (aiff->block_duration) {
     184          12 :         par->bit_rate = (int64_t)par->sample_rate * (par->block_align << 3) /
     185           6 :                         aiff->block_duration;
     186             :     }
     187             : 
     188             :     /* Chunk is over */
     189           6 :     if (size)
     190           4 :         avio_skip(pb, size);
     191             : 
     192           6 :     return num_frames;
     193             : }
     194             : 
     195        5563 : static int aiff_probe(AVProbeData *p)
     196             : {
     197             :     /* check file header */
     198        5577 :     if (p->buf[0] == 'F' && p->buf[1] == 'O' &&
     199          42 :         p->buf[2] == 'R' && p->buf[3] == 'M' &&
     200          26 :         p->buf[8] == 'A' && p->buf[9] == 'I' &&
     201          12 :         p->buf[10] == 'F' && (p->buf[11] == 'F' || p->buf[11] == 'C'))
     202           6 :         return AVPROBE_SCORE_MAX;
     203             :     else
     204        5557 :         return 0;
     205             : }
     206             : 
     207             : /* aiff input */
     208           6 : static int aiff_read_header(AVFormatContext *s)
     209             : {
     210             :     int ret, size, filesize;
     211           6 :     int64_t offset = 0, position;
     212             :     uint32_t tag;
     213           6 :     unsigned version = AIFF_C_VERSION1;
     214           6 :     AVIOContext *pb = s->pb;
     215             :     AVStream * st;
     216           6 :     AIFFInputContext *aiff = s->priv_data;
     217           6 :     ID3v2ExtraMeta *id3v2_extra_meta = NULL;
     218             : 
     219             :     /* check FORM header */
     220           6 :     filesize = get_tag(pb, &tag);
     221           6 :     if (filesize < 0 || tag != MKTAG('F', 'O', 'R', 'M'))
     222           0 :         return AVERROR_INVALIDDATA;
     223             : 
     224             :     /* AIFF data type */
     225           6 :     tag = avio_rl32(pb);
     226           6 :     if (tag == MKTAG('A', 'I', 'F', 'F'))       /* Got an AIFF file */
     227           2 :         version = AIFF;
     228           4 :     else if (tag != MKTAG('A', 'I', 'F', 'C'))  /* An AIFF-C file then */
     229           0 :         return AVERROR_INVALIDDATA;
     230             : 
     231           6 :     filesize -= 4;
     232             : 
     233           6 :     st = avformat_new_stream(s, NULL);
     234           6 :     if (!st)
     235           0 :         return AVERROR(ENOMEM);
     236             : 
     237          30 :     while (filesize > 0) {
     238             :         /* parse different chunks */
     239          18 :         size = get_tag(pb, &tag);
     240             : 
     241          18 :         if (size == AVERROR_EOF && offset > 0 && st->codecpar->block_align) {
     242           0 :             av_log(s, AV_LOG_WARNING, "header parser hit EOF\n");
     243           0 :             goto got_sound;
     244             :         }
     245          18 :         if (size < 0)
     246           0 :             return size;
     247             : 
     248          18 :         filesize -= size + 8;
     249             : 
     250          18 :         switch (tag) {
     251             :         case MKTAG('C', 'O', 'M', 'M'):     /* Common chunk */
     252             :             /* Then for the complete header info */
     253           6 :             st->nb_frames = get_aiff_header(s, size, version);
     254           6 :             if (st->nb_frames < 0)
     255           0 :                 return st->nb_frames;
     256           6 :             if (offset > 0) // COMM is after SSND
     257           0 :                 goto got_sound;
     258           6 :             break;
     259             :         case MKTAG('I', 'D', '3', ' '):
     260           0 :             position = avio_tell(pb);
     261           0 :             ff_id3v2_read(s, ID3v2_DEFAULT_MAGIC, &id3v2_extra_meta, size);
     262           0 :             if (id3v2_extra_meta)
     263           0 :                 if ((ret = ff_id3v2_parse_apic(s, &id3v2_extra_meta)) < 0) {
     264           0 :                     ff_id3v2_free_extra_meta(&id3v2_extra_meta);
     265           0 :                     return ret;
     266             :                 }
     267           0 :             ff_id3v2_free_extra_meta(&id3v2_extra_meta);
     268           0 :             if (position + size > avio_tell(pb))
     269           0 :                 avio_skip(pb, position + size - avio_tell(pb));
     270           0 :             break;
     271             :         case MKTAG('F', 'V', 'E', 'R'):     /* Version chunk */
     272           4 :             version = avio_rb32(pb);
     273           4 :             break;
     274             :         case MKTAG('N', 'A', 'M', 'E'):     /* Sample name chunk */
     275           2 :             get_meta(s, "title"    , size);
     276           2 :             break;
     277             :         case MKTAG('A', 'U', 'T', 'H'):     /* Author chunk */
     278           0 :             get_meta(s, "author"   , size);
     279           0 :             break;
     280             :         case MKTAG('(', 'c', ')', ' '):     /* Copyright chunk */
     281           0 :             get_meta(s, "copyright", size);
     282           0 :             break;
     283             :         case MKTAG('A', 'N', 'N', 'O'):     /* Annotation chunk */
     284           0 :             get_meta(s, "comment"  , size);
     285           0 :             break;
     286             :         case MKTAG('S', 'S', 'N', 'D'):     /* Sampled sound chunk */
     287           6 :             aiff->data_end = avio_tell(pb) + size;
     288           6 :             offset = avio_rb32(pb);      /* Offset of sound data */
     289           6 :             avio_rb32(pb);               /* BlockSize... don't care */
     290           6 :             offset += avio_tell(pb);    /* Compute absolute data offset */
     291           6 :             if (st->codecpar->block_align && !pb->seekable)    /* Assume COMM already parsed */
     292           0 :                 goto got_sound;
     293           6 :             if (!pb->seekable) {
     294           0 :                 av_log(s, AV_LOG_ERROR, "file is not seekable\n");
     295           0 :                 return -1;
     296             :             }
     297           6 :             avio_skip(pb, size - 8);
     298           6 :             break;
     299             :         case MKTAG('w', 'a', 'v', 'e'):
     300           0 :             if ((uint64_t)size > (1<<30))
     301           0 :                 return -1;
     302           0 :             if (ff_get_extradata(s, st->codecpar, pb, size) < 0)
     303           0 :                 return AVERROR(ENOMEM);
     304           0 :             if (   (st->codecpar->codec_id == AV_CODEC_ID_QDMC || st->codecpar->codec_id == AV_CODEC_ID_QDM2)
     305           0 :                 && size>=12*4 && !st->codecpar->block_align) {
     306           0 :                 st->codecpar->block_align = AV_RB32(st->codecpar->extradata+11*4);
     307           0 :                 aiff->block_duration = AV_RB32(st->codecpar->extradata+9*4);
     308           0 :             } else if (st->codecpar->codec_id == AV_CODEC_ID_QCELP) {
     309           0 :                 char rate = 0;
     310           0 :                 if (size >= 25)
     311           0 :                     rate = st->codecpar->extradata[24];
     312           0 :                 switch (rate) {
     313             :                 case 'H': // RATE_HALF
     314           0 :                     st->codecpar->block_align = 17;
     315           0 :                     break;
     316             :                 case 'F': // RATE_FULL
     317             :                 default:
     318           0 :                     st->codecpar->block_align = 35;
     319             :                 }
     320           0 :                 aiff->block_duration = 160;
     321           0 :                 st->codecpar->bit_rate = (int64_t)st->codecpar->sample_rate * (st->codecpar->block_align << 3) /
     322           0 :                                          aiff->block_duration;
     323             :             }
     324           0 :             break;
     325             :         case MKTAG('C','H','A','N'):
     326           0 :             if(ff_mov_read_chan(s, pb, st, size) < 0)
     327           0 :                 return AVERROR_INVALIDDATA;
     328           0 :             break;
     329             :         case 0:
     330           0 :             if (offset > 0 && st->codecpar->block_align) // COMM && SSND
     331           0 :                 goto got_sound;
     332             :         default: /* Jump */
     333           0 :             if (size & 1)   /* Always even aligned */
     334           0 :                 size++;
     335           0 :             avio_skip(pb, size);
     336             :         }
     337             :     }
     338             : 
     339             : got_sound:
     340           6 :     if (!st->codecpar->block_align && st->codecpar->codec_id == AV_CODEC_ID_QCELP) {
     341           0 :         av_log(s, AV_LOG_WARNING, "qcelp without wave chunk, assuming full rate\n");
     342           0 :         st->codecpar->block_align = 35;
     343           6 :     } else if (!st->codecpar->block_align) {
     344           0 :         av_log(s, AV_LOG_ERROR, "could not find COMM tag or invalid block_align value\n");
     345           0 :         return -1;
     346             :     }
     347             : 
     348             :     /* Now positioned, get the sound data start and end */
     349           6 :     avpriv_set_pts_info(st, 64, 1, st->codecpar->sample_rate);
     350           6 :     st->start_time = 0;
     351           6 :     st->duration = st->nb_frames * aiff->block_duration;
     352             : 
     353             :     /* Position the stream at the first block */
     354           6 :     avio_seek(pb, offset, SEEK_SET);
     355             : 
     356           6 :     return 0;
     357             : }
     358             : 
     359             : #define MAX_SIZE 4096
     360             : 
     361        8497 : static int aiff_read_packet(AVFormatContext *s,
     362             :                             AVPacket *pkt)
     363             : {
     364        8497 :     AVStream *st = s->streams[0];
     365        8497 :     AIFFInputContext *aiff = s->priv_data;
     366             :     int64_t max_size;
     367             :     int res, size;
     368             : 
     369             :     /* calculate size of remaining data */
     370        8497 :     max_size = aiff->data_end - avio_tell(s->pb);
     371        8497 :     if (max_size <= 0)
     372          17 :         return AVERROR_EOF;
     373             : 
     374        8480 :     if (!st->codecpar->block_align) {
     375           0 :         av_log(s, AV_LOG_ERROR, "block_align not set\n");
     376           0 :         return AVERROR_INVALIDDATA;
     377             :     }
     378             : 
     379             :     /* Now for that packet */
     380        8480 :     switch (st->codecpar->codec_id) {
     381             :     case AV_CODEC_ID_ADPCM_IMA_QT:
     382             :     case AV_CODEC_ID_GSM:
     383             :     case AV_CODEC_ID_QDM2:
     384             :     case AV_CODEC_ID_QCELP:
     385        8422 :         size = st->codecpar->block_align;
     386        8422 :         break;
     387             :     default:
     388          58 :         size = st->codecpar->block_align ? (MAX_SIZE / st->codecpar->block_align) * st->codecpar->block_align : MAX_SIZE;
     389             :     }
     390        8480 :     size = FFMIN(max_size, size);
     391        8480 :     res = av_get_packet(s->pb, pkt, size);
     392        8480 :     if (res < 0)
     393           0 :         return res;
     394             : 
     395        8480 :     if (size >= st->codecpar->block_align)
     396        8480 :         pkt->flags &= ~AV_PKT_FLAG_CORRUPT;
     397             :     /* Only one stream in an AIFF file */
     398        8480 :     pkt->stream_index = 0;
     399        8480 :     pkt->duration     = (res / st->codecpar->block_align) * aiff->block_duration;
     400        8480 :     return 0;
     401             : }
     402             : 
     403             : AVInputFormat ff_aiff_demuxer = {
     404             :     .name           = "aiff",
     405             :     .long_name      = NULL_IF_CONFIG_SMALL("Audio IFF"),
     406             :     .priv_data_size = sizeof(AIFFInputContext),
     407             :     .read_probe     = aiff_probe,
     408             :     .read_header    = aiff_read_header,
     409             :     .read_packet    = aiff_read_packet,
     410             :     .read_seek      = ff_pcm_read_seek,
     411             :     .codec_tag      = (const AVCodecTag* const []){ ff_codec_aiff_tags, 0 },
     412             : };

Generated by: LCOV version 1.12