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aiffdec.c
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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;
40 
42 {
43  if (bps <= 8)
44  return AV_CODEC_ID_PCM_S8;
45  if (bps <= 16)
46  return AV_CODEC_ID_PCM_S16BE;
47  if (bps <= 24)
48  return AV_CODEC_ID_PCM_S24BE;
49  if (bps <= 32)
50  return AV_CODEC_ID_PCM_S32BE;
51 
52  /* bigger than 32 isn't allowed */
53  return AV_CODEC_ID_NONE;
54 }
55 
56 /* returns the size of the found tag */
57 static int get_tag(AVIOContext *pb, uint32_t * tag)
58 {
59  int size;
60 
61  if (avio_feof(pb))
62  return AVERROR(EIO);
63 
64  *tag = avio_rl32(pb);
65  size = avio_rb32(pb);
66 
67  if (size < 0)
68  size = 0x7fffffff;
69 
70  return size;
71 }
72 
73 /* Metadata string read */
74 static void get_meta(AVFormatContext *s, const char *key, int size)
75 {
76  uint8_t *str = av_malloc(size+1);
77 
78  if (str) {
79  int res = avio_read(s->pb, str, size);
80  if (res < 0){
81  av_free(str);
82  return;
83  }
84  size += (size&1)-res;
85  str[res] = 0;
87  }else
88  size+= size&1;
89 
90  avio_skip(s->pb, size);
91 }
92 
93 /* Returns the number of sound data frames or negative on error */
95  unsigned version)
96 {
97  AVIOContext *pb = s->pb;
98  AVCodecParameters *par = s->streams[0]->codecpar;
99  AIFFInputContext *aiff = s->priv_data;
100  int exp;
101  uint64_t val;
102  int sample_rate;
103  unsigned int num_frames;
104 
105  if (size & 1)
106  size++;
108  par->channels = avio_rb16(pb);
109  num_frames = avio_rb32(pb);
110  par->bits_per_coded_sample = avio_rb16(pb);
111 
112  exp = avio_rb16(pb) - 16383 - 63;
113  val = avio_rb64(pb);
114  if (exp <-63 || exp >63) {
115  av_log(s, AV_LOG_ERROR, "exp %d is out of range\n", exp);
116  return AVERROR_INVALIDDATA;
117  }
118  if (exp >= 0)
119  sample_rate = val << exp;
120  else
121  sample_rate = (val + (1ULL<<(-exp-1))) >> -exp;
122  par->sample_rate = sample_rate;
123  size -= 18;
124 
125  /* get codec id for AIFF-C */
126  if (size < 4) {
127  version = AIFF;
128  } else if (version == AIFF_C_VERSION1) {
129  par->codec_tag = avio_rl32(pb);
131  if (par->codec_id == AV_CODEC_ID_NONE) {
132  char tag[32];
133  av_get_codec_tag_string(tag, sizeof(tag), par->codec_tag);
134  avpriv_request_sample(s, "unknown or unsupported codec tag: %s", tag);
135  }
136  size -= 4;
137  }
138 
139  if (version != AIFF_C_VERSION1 || par->codec_id == AV_CODEC_ID_PCM_S16BE) {
142  aiff->block_duration = 1;
143  } else {
144  switch (par->codec_id) {
150  aiff->block_duration = 1;
151  break;
153  par->block_align = 34 * par->channels;
154  break;
155  case AV_CODEC_ID_MACE3:
156  par->block_align = 2 * par->channels;
157  break;
159  par->bits_per_coded_sample = 5;
162  case AV_CODEC_ID_MACE6:
164  par->block_align = 1 * par->channels;
165  break;
166  case AV_CODEC_ID_GSM:
167  par->block_align = 33;
168  break;
169  default:
170  aiff->block_duration = 1;
171  break;
172  }
173  if (par->block_align > 0)
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  if (!par->block_align)
181  par->block_align = (av_get_bits_per_sample(par->codec_id) * par->channels) >> 3;
182 
183  if (aiff->block_duration) {
184  par->bit_rate = par->sample_rate * (par->block_align << 3) /
185  aiff->block_duration;
186  }
187 
188  /* Chunk is over */
189  if (size)
190  avio_skip(pb, size);
191 
192  return num_frames;
193 }
194 
195 static int aiff_probe(AVProbeData *p)
196 {
197  /* check file header */
198  if (p->buf[0] == 'F' && p->buf[1] == 'O' &&
199  p->buf[2] == 'R' && p->buf[3] == 'M' &&
200  p->buf[8] == 'A' && p->buf[9] == 'I' &&
201  p->buf[10] == 'F' && (p->buf[11] == 'F' || p->buf[11] == 'C'))
202  return AVPROBE_SCORE_MAX;
203  else
204  return 0;
205 }
206 
207 /* aiff input */
209 {
210  int ret, size, filesize;
211  int64_t offset = 0, position;
212  uint32_t tag;
213  unsigned version = AIFF_C_VERSION1;
214  AVIOContext *pb = s->pb;
215  AVStream * st;
216  AIFFInputContext *aiff = s->priv_data;
217  ID3v2ExtraMeta *id3v2_extra_meta = NULL;
218 
219  /* check FORM header */
220  filesize = get_tag(pb, &tag);
221  if (filesize < 0 || tag != MKTAG('F', 'O', 'R', 'M'))
222  return AVERROR_INVALIDDATA;
223 
224  /* AIFF data type */
225  tag = avio_rl32(pb);
226  if (tag == MKTAG('A', 'I', 'F', 'F')) /* Got an AIFF file */
227  version = AIFF;
228  else if (tag != MKTAG('A', 'I', 'F', 'C')) /* An AIFF-C file then */
229  return AVERROR_INVALIDDATA;
230 
231  filesize -= 4;
232 
233  st = avformat_new_stream(s, NULL);
234  if (!st)
235  return AVERROR(ENOMEM);
236 
237  while (filesize > 0) {
238  /* parse different chunks */
239  size = get_tag(pb, &tag);
240 
241  if (size == AVERROR_EOF && offset > 0 && st->codecpar->block_align) {
242  av_log(s, AV_LOG_WARNING, "header parser hit EOF\n");
243  goto got_sound;
244  }
245  if (size < 0)
246  return size;
247 
248  filesize -= size + 8;
249 
250  switch (tag) {
251  case MKTAG('C', 'O', 'M', 'M'): /* Common chunk */
252  /* Then for the complete header info */
253  st->nb_frames = get_aiff_header(s, size, version);
254  if (st->nb_frames < 0)
255  return st->nb_frames;
256  if (offset > 0) // COMM is after SSND
257  goto got_sound;
258  break;
259  case MKTAG('I', 'D', '3', ' '):
260  position = avio_tell(pb);
261  ff_id3v2_read(s, ID3v2_DEFAULT_MAGIC, &id3v2_extra_meta, size);
262  if (id3v2_extra_meta)
263  if ((ret = ff_id3v2_parse_apic(s, &id3v2_extra_meta)) < 0) {
264  ff_id3v2_free_extra_meta(&id3v2_extra_meta);
265  return ret;
266  }
267  ff_id3v2_free_extra_meta(&id3v2_extra_meta);
268  if (position + size > avio_tell(pb))
269  avio_skip(pb, position + size - avio_tell(pb));
270  break;
271  case MKTAG('F', 'V', 'E', 'R'): /* Version chunk */
272  version = avio_rb32(pb);
273  break;
274  case MKTAG('N', 'A', 'M', 'E'): /* Sample name chunk */
275  get_meta(s, "title" , size);
276  break;
277  case MKTAG('A', 'U', 'T', 'H'): /* Author chunk */
278  get_meta(s, "author" , size);
279  break;
280  case MKTAG('(', 'c', ')', ' '): /* Copyright chunk */
281  get_meta(s, "copyright", size);
282  break;
283  case MKTAG('A', 'N', 'N', 'O'): /* Annotation chunk */
284  get_meta(s, "comment" , size);
285  break;
286  case MKTAG('S', 'S', 'N', 'D'): /* Sampled sound chunk */
287  aiff->data_end = avio_tell(pb) + size;
288  offset = avio_rb32(pb); /* Offset of sound data */
289  avio_rb32(pb); /* BlockSize... don't care */
290  offset += avio_tell(pb); /* Compute absolute data offset */
291  if (st->codecpar->block_align && !pb->seekable) /* Assume COMM already parsed */
292  goto got_sound;
293  if (!pb->seekable) {
294  av_log(s, AV_LOG_ERROR, "file is not seekable\n");
295  return -1;
296  }
297  avio_skip(pb, size - 8);
298  break;
299  case MKTAG('w', 'a', 'v', 'e'):
300  if ((uint64_t)size > (1<<30))
301  return -1;
302  if (ff_get_extradata(s, st->codecpar, pb, size) < 0)
303  return AVERROR(ENOMEM);
305  && size>=12*4 && !st->codecpar->block_align) {
306  st->codecpar->block_align = AV_RB32(st->codecpar->extradata+11*4);
307  aiff->block_duration = AV_RB32(st->codecpar->extradata+9*4);
308  } else if (st->codecpar->codec_id == AV_CODEC_ID_QCELP) {
309  char rate = 0;
310  if (size >= 25)
311  rate = st->codecpar->extradata[24];
312  switch (rate) {
313  case 'H': // RATE_HALF
314  st->codecpar->block_align = 17;
315  break;
316  case 'F': // RATE_FULL
317  default:
318  st->codecpar->block_align = 35;
319  }
320  aiff->block_duration = 160;
321  st->codecpar->bit_rate = st->codecpar->sample_rate * (st->codecpar->block_align << 3) /
322  aiff->block_duration;
323  }
324  break;
325  case MKTAG('C','H','A','N'):
326  if(ff_mov_read_chan(s, pb, st, size) < 0)
327  return AVERROR_INVALIDDATA;
328  break;
329  case 0:
330  if (offset > 0 && st->codecpar->block_align) // COMM && SSND
331  goto got_sound;
332  default: /* Jump */
333  if (size & 1) /* Always even aligned */
334  size++;
335  avio_skip(pb, size);
336  }
337  }
338 
339 got_sound:
340  if (!st->codecpar->block_align) {
341  av_log(s, AV_LOG_ERROR, "could not find COMM tag or invalid block_align value\n");
342  return -1;
343  }
344 
345  /* Now positioned, get the sound data start and end */
346  avpriv_set_pts_info(st, 64, 1, st->codecpar->sample_rate);
347  st->start_time = 0;
348  st->duration = st->nb_frames * aiff->block_duration;
349 
350  /* Position the stream at the first block */
351  avio_seek(pb, offset, SEEK_SET);
352 
353  return 0;
354 }
355 
356 #define MAX_SIZE 4096
357 
359  AVPacket *pkt)
360 {
361  AVStream *st = s->streams[0];
362  AIFFInputContext *aiff = s->priv_data;
363  int64_t max_size;
364  int res, size;
365 
366  /* calculate size of remaining data */
367  max_size = aiff->data_end - avio_tell(s->pb);
368  if (max_size <= 0)
369  return AVERROR_EOF;
370 
371  /* Now for that packet */
372  switch (st->codecpar->codec_id) {
374  case AV_CODEC_ID_GSM:
375  case AV_CODEC_ID_QDM2:
376  case AV_CODEC_ID_QCELP:
377  size = st->codecpar->block_align;
378  break;
379  default:
380  size = (MAX_SIZE / st->codecpar->block_align) * st->codecpar->block_align;
381  }
382  size = FFMIN(max_size, size);
383  res = av_get_packet(s->pb, pkt, size);
384  if (res < 0)
385  return res;
386 
387  if (size >= st->codecpar->block_align)
388  pkt->flags &= ~AV_PKT_FLAG_CORRUPT;
389  /* Only one stream in an AIFF file */
390  pkt->stream_index = 0;
391  pkt->duration = (res / st->codecpar->block_align) * aiff->block_duration;
392  return 0;
393 }
394 
396  .name = "aiff",
397  .long_name = NULL_IF_CONFIG_SMALL("Audio IFF"),
398  .priv_data_size = sizeof(AIFFInputContext),
403  .codec_tag = (const AVCodecTag* const []){ ff_codec_aiff_tags, 0 },
404 };
#define NULL
Definition: coverity.c:32
const char const char void * val
Definition: avisynth_c.h:771
static int get_aiff_header(AVFormatContext *s, int size, unsigned version)
Definition: aiffdec.c:94
const char * s
Definition: avisynth_c.h:768
Bytestream IO Context.
Definition: avio.h:147
#define AVERROR_INVALIDDATA
Invalid data found when processing input.
Definition: error.h:59
int64_t data_end
Definition: aiffdec.c:37
enum AVCodecID ff_codec_get_id(const AVCodecTag *tags, unsigned int tag)
Definition: utils.c:3002
#define AV_LOG_WARNING
Something somehow does not look correct.
Definition: log.h:182
void avpriv_set_pts_info(AVStream *s, int pts_wrap_bits, unsigned int pts_num, unsigned int pts_den)
Set the time base and wrapping info for a given stream.
Definition: utils.c:4549
#define MAX_SIZE
Definition: aiffdec.c:356
static int read_seek(AVFormatContext *ctx, int stream_index, int64_t timestamp, int flags)
Definition: libcdio.c:153
enum AVCodecID codec_id
Specific type of the encoded data (the codec used).
Definition: avcodec.h:3979
#define ID3v2_DEFAULT_MAGIC
Default magic bytes for ID3v2 header: "ID3".
Definition: id3v2.h:35
int64_t avio_seek(AVIOContext *s, int64_t offset, int whence)
fseek() equivalent for AVIOContext.
Definition: aviobuf.c:230
int64_t avio_skip(AVIOContext *s, int64_t offset)
Skip given number of bytes forward.
Definition: aviobuf.c:304
size_t av_get_codec_tag_string(char *buf, size_t buf_size, unsigned int codec_tag)
Put a string representing the codec tag codec_tag in buf.
Definition: utils.c:3131
static int aiff_read_header(AVFormatContext *s)
Definition: aiffdec.c:208
int version
Definition: avisynth_c.h:766
static AVPacket pkt
unsigned int avio_rb16(AVIOContext *s)
Definition: aviobuf.c:742
int ff_id3v2_parse_apic(AVFormatContext *s, ID3v2ExtraMeta **extra_meta)
Create a stream for each APIC (attached picture) extracted from the ID3v2 header. ...
Definition: id3v2.c:1123
This struct describes the properties of an encoded stream.
Definition: avcodec.h:3971
Format I/O context.
Definition: avformat.h:1330
Public dictionary API.
void void avpriv_request_sample(void *avc, const char *msg,...) av_printf_format(2
Log a generic warning message about a missing feature.
uint8_t
#define av_malloc(s)
unsigned int avio_rb32(AVIOContext *s)
Definition: aviobuf.c:757
int64_t duration
Duration of this packet in AVStream->time_base units, 0 if unknown.
Definition: avcodec.h:1618
AVStream * avformat_new_stream(AVFormatContext *s, const AVCodec *c)
Add a new stream to a media file.
Definition: utils.c:4182
static int aiff_read_packet(AVFormatContext *s, AVPacket *pkt)
Definition: aiffdec.c:358
uint64_t_TMPL AV_WL64 unsigned int_TMPL AV_WL32 unsigned int_TMPL AV_WL24 unsigned int_TMPL AV_WL16 uint64_t_TMPL AV_WB64 unsigned int_TMPL AV_RB32
Definition: bytestream.h:87
AVStream ** streams
A list of all streams in the file.
Definition: avformat.h:1398
#define AIFF_C_VERSION1
Definition: aiffdec.c:34
uint32_t tag
Definition: movenc.c:1382
#define AVERROR_EOF
End of file.
Definition: error.h:55
int av_get_packet(AVIOContext *s, AVPacket *pkt, int size)
Allocate and read the payload of a packet and initialize its fields with default values.
Definition: utils.c:289
ptrdiff_t size
Definition: opengl_enc.c:101
uint64_t avio_rb64(AVIOContext *s)
Definition: aviobuf.c:824
static av_always_inline int64_t avio_tell(AVIOContext *s)
ftell() equivalent for AVIOContext.
Definition: avio.h:511
#define av_log(a,...)
int avio_read(AVIOContext *s, unsigned char *buf, int size)
Read size bytes from AVIOContext into buf.
Definition: aviobuf.c:604
int64_t bit_rate
The average bitrate of the encoded data (in bits per second).
Definition: avcodec.h:4008
AVCodecID
Identify the syntax and semantics of the bitstream.
Definition: avcodec.h:191
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
Definition: log.h:176
int av_get_bits_per_sample(enum AVCodecID codec_id)
Return codec bits per sample.
Definition: utils.c:3486
AVDictionary * metadata
Metadata that applies to the whole file.
Definition: avformat.h:1546
unsigned int avio_rl32(AVIOContext *s)
Definition: aviobuf.c:726
#define AVERROR(e)
Definition: error.h:43
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification. ...
Definition: internal.h:176
enum AVMediaType codec_type
General type of the encoded data.
Definition: avcodec.h:3975
void ff_id3v2_free_extra_meta(ID3v2ExtraMeta **extra_meta)
Free memory allocated parsing special (non-text) metadata.
Definition: id3v2.c:1107
static void get_meta(AVFormatContext *s, const char *key, int size)
Definition: aiffdec.c:74
static enum AVCodecID aiff_codec_get_id(int bps)
Definition: aiffdec.c:41
static const uint8_t offset[127][2]
Definition: vf_spp.c:92
int av_get_audio_frame_duration2(AVCodecParameters *par, int frame_bytes)
This function is the same as av_get_audio_frame_duration(), except it works with AVCodecParameters in...
Definition: utils.c:3697
int8_t exp
Definition: eval.c:64
int flags
A combination of AV_PKT_FLAG values.
Definition: avcodec.h:1606
unsigned char * buf
Buffer must have AVPROBE_PADDING_SIZE of extra allocated bytes filled with zero.
Definition: avformat.h:463
int block_align
Audio only.
Definition: avcodec.h:4096
int seekable
A combination of AVIO_SEEKABLE_ flags or 0 when the stream is not seekable.
Definition: avio.h:243
#define FFMIN(a, b)
Definition: common.h:96
#define AV_DICT_DONT_STRDUP_VAL
Take ownership of a value that's been allocated with av_malloc() or another memory allocation functio...
Definition: dict.h:76
static int read_probe(AVProbeData *pd)
Definition: jvdec.c:55
static int aiff_probe(AVProbeData *p)
Definition: aiffdec.c:195
int ff_pcm_read_seek(AVFormatContext *s, int stream_index, int64_t timestamp, int flags)
Definition: pcm.c:45
int ff_mov_read_chan(AVFormatContext *s, AVIOContext *pb, AVStream *st, int64_t size)
Read 'chan' tag from the input stream.
Definition: mov_chan.c:547
static int read_header(FFV1Context *f)
Definition: ffv1dec.c:514
Stream structure.
Definition: avformat.h:881
static int read_packet(void *opaque, uint8_t *buf, int buf_size)
Definition: avio_reading.c:42
static int get_tag(AVIOContext *pb, uint32_t *tag)
Definition: aiffdec.c:57
int block_duration
Definition: aiffdec.c:38
sample_rate
AVIOContext * pb
I/O context.
Definition: avformat.h:1372
int av_dict_set(AVDictionary **pm, const char *key, const char *value, int flags)
Set the given entry in *pm, overwriting an existing entry.
Definition: dict.c:70
This structure contains the data a format has to probe a file.
Definition: avformat.h:461
int64_t duration
Decoding: duration of the stream, in stream time base.
Definition: avformat.h:935
int sample_rate
Audio only.
Definition: avcodec.h:4089
#define AVPROBE_SCORE_MAX
maximum score
Definition: avformat.h:473
Main libavformat public API header.
AVInputFormat ff_aiff_demuxer
Definition: aiffdec.c:395
int64_t start_time
Decoding: pts of the first frame of the stream in presentation order, in stream time base...
Definition: avformat.h:928
int ff_get_extradata(AVFormatContext *s, AVCodecParameters *par, AVIOContext *pb, int size)
Allocate extradata with additional AV_INPUT_BUFFER_PADDING_SIZE at end which is always set to 0 and f...
Definition: utils.c:3186
static const AVCodecTag ff_codec_aiff_tags[]
Definition: aiff.h:33
void ff_id3v2_read(AVFormatContext *s, const char *magic, ID3v2ExtraMeta **extra_meta, unsigned int max_search_size)
Read an ID3v2 tag, including supported extra metadata and chapters.
Definition: id3v2.c:1101
int64_t nb_frames
number of frames in this stream if known or 0
Definition: avformat.h:937
#define AV_PKT_FLAG_CORRUPT
The packet content is corrupted.
Definition: avcodec.h:1633
unsigned bps
Definition: movenc.c:1383
#define AIFF
Definition: aiffdec.c:33
#define av_free(p)
as in Berlin toast format
Definition: avcodec.h:534
void * priv_data
Format private data.
Definition: avformat.h:1358
int bits_per_coded_sample
The number of bits per sample in the codedwords.
Definition: avcodec.h:4021
uint8_t * extradata
Extra binary data needed for initializing the decoder, codec-dependent.
Definition: avcodec.h:3993
int channels
Audio only.
Definition: avcodec.h:4085
common header for AIFF muxer and demuxer
const char * name
A comma separated list of short names for the format.
Definition: avformat.h:662
AVCodecParameters * codecpar
Definition: avformat.h:1233
int avio_feof(AVIOContext *s)
feof() equivalent for AVIOContext.
Definition: aviobuf.c:328
uint32_t codec_tag
Additional information about the codec (corresponds to the AVI FOURCC).
Definition: avcodec.h:3983
int stream_index
Definition: avcodec.h:1602
#define MKTAG(a, b, c, d)
Definition: common.h:342
This structure stores compressed data.
Definition: avcodec.h:1577