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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  AVCodecContext *codec = s->streams[0]->codec;
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  codec->channels = avio_rb16(pb);
109  num_frames = avio_rb32(pb);
110  codec->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  codec->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  codec->codec_tag = avio_rl32(pb);
131  size -= 4;
132  }
133 
134  if (version != AIFF_C_VERSION1 || codec->codec_id == AV_CODEC_ID_PCM_S16BE) {
137  aiff->block_duration = 1;
138  } else {
139  switch (codec->codec_id) {
145  aiff->block_duration = 1;
146  break;
148  codec->block_align = 34*codec->channels;
149  break;
150  case AV_CODEC_ID_MACE3:
151  codec->block_align = 2*codec->channels;
152  break;
154  codec->bits_per_coded_sample = 5;
156  case AV_CODEC_ID_MACE6:
157  codec->block_align = 1*codec->channels;
158  break;
159  case AV_CODEC_ID_GSM:
160  codec->block_align = 33;
161  break;
162  default:
163  aiff->block_duration = 1;
164  break;
165  }
166  if (codec->block_align > 0)
168  codec->block_align);
169  }
170 
171  /* Block align needs to be computed in all cases, as the definition
172  * is specific to applications -> here we use the WAVE format definition */
173  if (!codec->block_align)
174  codec->block_align = (av_get_bits_per_sample(codec->codec_id) * codec->channels) >> 3;
175 
176  if (aiff->block_duration) {
177  codec->bit_rate = codec->sample_rate * (codec->block_align << 3) /
178  aiff->block_duration;
179  }
180 
181  /* Chunk is over */
182  if (size)
183  avio_skip(pb, size);
184 
185  return num_frames;
186 }
187 
188 static int aiff_probe(AVProbeData *p)
189 {
190  /* check file header */
191  if (p->buf[0] == 'F' && p->buf[1] == 'O' &&
192  p->buf[2] == 'R' && p->buf[3] == 'M' &&
193  p->buf[8] == 'A' && p->buf[9] == 'I' &&
194  p->buf[10] == 'F' && (p->buf[11] == 'F' || p->buf[11] == 'C'))
195  return AVPROBE_SCORE_MAX;
196  else
197  return 0;
198 }
199 
200 /* aiff input */
202 {
203  int ret, size, filesize;
204  int64_t offset = 0, position;
205  uint32_t tag;
206  unsigned version = AIFF_C_VERSION1;
207  AVIOContext *pb = s->pb;
208  AVStream * st;
209  AIFFInputContext *aiff = s->priv_data;
210  ID3v2ExtraMeta *id3v2_extra_meta = NULL;
211 
212  /* check FORM header */
213  filesize = get_tag(pb, &tag);
214  if (filesize < 0 || tag != MKTAG('F', 'O', 'R', 'M'))
215  return AVERROR_INVALIDDATA;
216 
217  /* AIFF data type */
218  tag = avio_rl32(pb);
219  if (tag == MKTAG('A', 'I', 'F', 'F')) /* Got an AIFF file */
220  version = AIFF;
221  else if (tag != MKTAG('A', 'I', 'F', 'C')) /* An AIFF-C file then */
222  return AVERROR_INVALIDDATA;
223 
224  filesize -= 4;
225 
226  st = avformat_new_stream(s, NULL);
227  if (!st)
228  return AVERROR(ENOMEM);
229 
230  while (filesize > 0) {
231  /* parse different chunks */
232  size = get_tag(pb, &tag);
233 
234  if (size == AVERROR_EOF && offset > 0 && st->codec->block_align) {
235  av_log(s, AV_LOG_WARNING, "header parser hit EOF\n");
236  goto got_sound;
237  }
238  if (size < 0)
239  return size;
240 
241  filesize -= size + 8;
242 
243  switch (tag) {
244  case MKTAG('C', 'O', 'M', 'M'): /* Common chunk */
245  /* Then for the complete header info */
246  st->nb_frames = get_aiff_header(s, size, version);
247  if (st->nb_frames < 0)
248  return st->nb_frames;
249  if (offset > 0) // COMM is after SSND
250  goto got_sound;
251  break;
252  case MKTAG('I', 'D', '3', ' '):
253  position = avio_tell(pb);
254  ff_id3v2_read(s, ID3v2_DEFAULT_MAGIC, &id3v2_extra_meta, size);
255  if (id3v2_extra_meta)
256  if ((ret = ff_id3v2_parse_apic(s, &id3v2_extra_meta)) < 0) {
257  ff_id3v2_free_extra_meta(&id3v2_extra_meta);
258  return ret;
259  }
260  ff_id3v2_free_extra_meta(&id3v2_extra_meta);
261  if (position + size > avio_tell(pb))
262  avio_skip(pb, position + size - avio_tell(pb));
263  break;
264  case MKTAG('F', 'V', 'E', 'R'): /* Version chunk */
265  version = avio_rb32(pb);
266  break;
267  case MKTAG('N', 'A', 'M', 'E'): /* Sample name chunk */
268  get_meta(s, "title" , size);
269  break;
270  case MKTAG('A', 'U', 'T', 'H'): /* Author chunk */
271  get_meta(s, "author" , size);
272  break;
273  case MKTAG('(', 'c', ')', ' '): /* Copyright chunk */
274  get_meta(s, "copyright", size);
275  break;
276  case MKTAG('A', 'N', 'N', 'O'): /* Annotation chunk */
277  get_meta(s, "comment" , size);
278  break;
279  case MKTAG('S', 'S', 'N', 'D'): /* Sampled sound chunk */
280  aiff->data_end = avio_tell(pb) + size;
281  offset = avio_rb32(pb); /* Offset of sound data */
282  avio_rb32(pb); /* BlockSize... don't care */
283  offset += avio_tell(pb); /* Compute absolute data offset */
284  if (st->codec->block_align && !pb->seekable) /* Assume COMM already parsed */
285  goto got_sound;
286  if (!pb->seekable) {
287  av_log(s, AV_LOG_ERROR, "file is not seekable\n");
288  return -1;
289  }
290  avio_skip(pb, size - 8);
291  break;
292  case MKTAG('w', 'a', 'v', 'e'):
293  if ((uint64_t)size > (1<<30))
294  return -1;
295  if (ff_get_extradata(st->codec, pb, size) < 0)
296  return AVERROR(ENOMEM);
297  if (st->codec->codec_id == AV_CODEC_ID_QDM2 && size>=12*4 && !st->codec->block_align) {
298  st->codec->block_align = AV_RB32(st->codec->extradata+11*4);
299  aiff->block_duration = AV_RB32(st->codec->extradata+9*4);
300  } else if (st->codec->codec_id == AV_CODEC_ID_QCELP) {
301  char rate = 0;
302  if (size >= 25)
303  rate = st->codec->extradata[24];
304  switch (rate) {
305  case 'H': // RATE_HALF
306  st->codec->block_align = 17;
307  break;
308  case 'F': // RATE_FULL
309  default:
310  st->codec->block_align = 35;
311  }
312  aiff->block_duration = 160;
313  st->codec->bit_rate = st->codec->sample_rate * (st->codec->block_align << 3) /
314  aiff->block_duration;
315  }
316  break;
317  case MKTAG('C','H','A','N'):
318  if(ff_mov_read_chan(s, pb, st, size) < 0)
319  return AVERROR_INVALIDDATA;
320  break;
321  case 0:
322  if (offset > 0 && st->codec->block_align) // COMM && SSND
323  goto got_sound;
324  default: /* Jump */
325  if (size & 1) /* Always even aligned */
326  size++;
327  avio_skip(pb, size);
328  }
329  }
330 
331 got_sound:
332  if (!st->codec->block_align) {
333  av_log(s, AV_LOG_ERROR, "could not find COMM tag or invalid block_align value\n");
334  return -1;
335  }
336 
337  /* Now positioned, get the sound data start and end */
338  avpriv_set_pts_info(st, 64, 1, st->codec->sample_rate);
339  st->start_time = 0;
340  st->duration = st->nb_frames * aiff->block_duration;
341 
342  /* Position the stream at the first block */
343  avio_seek(pb, offset, SEEK_SET);
344 
345  return 0;
346 }
347 
348 #define MAX_SIZE 4096
349 
351  AVPacket *pkt)
352 {
353  AVStream *st = s->streams[0];
354  AIFFInputContext *aiff = s->priv_data;
355  int64_t max_size;
356  int res, size;
357 
358  /* calculate size of remaining data */
359  max_size = aiff->data_end - avio_tell(s->pb);
360  if (max_size <= 0)
361  return AVERROR_EOF;
362 
363  /* Now for that packet */
364  switch (st->codec->codec_id) {
366  case AV_CODEC_ID_GSM:
367  case AV_CODEC_ID_QDM2:
368  case AV_CODEC_ID_QCELP:
369  size = st->codec->block_align;
370  break;
371  default:
372  size = (MAX_SIZE / st->codec->block_align) * st->codec->block_align;
373  }
374  size = FFMIN(max_size, size);
375  res = av_get_packet(s->pb, pkt, size);
376  if (res < 0)
377  return res;
378 
379  if (size >= st->codec->block_align)
380  pkt->flags &= ~AV_PKT_FLAG_CORRUPT;
381  /* Only one stream in an AIFF file */
382  pkt->stream_index = 0;
383  pkt->duration = (res / st->codec->block_align) * aiff->block_duration;
384  return 0;
385 }
386 
388  .name = "aiff",
389  .long_name = NULL_IF_CONFIG_SMALL("Audio IFF"),
390  .priv_data_size = sizeof(AIFFInputContext),
395  .codec_tag = (const AVCodecTag* const []){ ff_codec_aiff_tags, 0 },
396 };
#define NULL
Definition: coverity.c:32
const char const char void * val
Definition: avisynth_c.h:634
static int get_aiff_header(AVFormatContext *s, int size, unsigned version)
Definition: aiffdec.c:94
const char * s
Definition: avisynth_c.h:631
Bytestream IO Context.
Definition: avio.h:111
#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:2773
#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:4075
int ff_get_extradata(AVCodecContext *avctx, 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:2945
#define MAX_SIZE
Definition: aiffdec.c:348
static int read_seek(AVFormatContext *ctx, int stream_index, int64_t timestamp, int flags)
Definition: libcdio.c:153
#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:204
int64_t avio_skip(AVIOContext *s, int64_t offset)
Skip given number of bytes forward.
Definition: aviobuf.c:277
static int aiff_read_header(AVFormatContext *s)
Definition: aiffdec.c:201
int version
Definition: avisynth_c.h:629
static AVPacket pkt
unsigned int avio_rb16(AVIOContext *s)
Definition: aviobuf.c:675
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:1078
int block_align
number of bytes per packet if constant and known or 0 Used by some WAV based audio codecs...
Definition: avcodec.h:2298
Format I/O context.
Definition: avformat.h:1273
Public dictionary API.
uint8_t
#define av_malloc(s)
unsigned int avio_rb32(AVIOContext *s)
Definition: aviobuf.c:690
uint8_t * extradata
some codecs need / can use extradata like Huffman tables.
Definition: avcodec.h:1616
AVStream * avformat_new_stream(AVFormatContext *s, const AVCodec *c)
Add a new stream to a media file.
Definition: utils.c:3741
static int aiff_read_packet(AVFormatContext *s, AVPacket *pkt)
Definition: aiffdec.c:350
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:1341
#define AIFF_C_VERSION1
Definition: aiffdec.c:34
uint32_t tag
Definition: movenc.c:1334
#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:244
ptrdiff_t size
Definition: opengl_enc.c:101
uint64_t avio_rb64(AVIOContext *s)
Definition: aviobuf.c:757
static av_always_inline int64_t avio_tell(AVIOContext *s)
ftell() equivalent for AVIOContext.
Definition: avio.h:390
int bits_per_coded_sample
bits per sample/pixel from the demuxer (needed for huffyuv).
Definition: avcodec.h:2995
int duration
Duration of this packet in AVStream->time_base units, 0 if unknown.
Definition: avcodec.h:1440
#define av_log(a,...)
int avio_read(AVIOContext *s, unsigned char *buf, int size)
Read size bytes from AVIOContext into buf.
Definition: aviobuf.c:538
AVCodecID
Identify the syntax and semantics of the bitstream.
Definition: avcodec.h:102
#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:3392
AVDictionary * metadata
Metadata that applies to the whole file.
Definition: avformat.h:1483
unsigned int avio_rl32(AVIOContext *s)
Definition: aviobuf.c:659
#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:175
void ff_id3v2_free_extra_meta(ID3v2ExtraMeta **extra_meta)
Free memory allocated parsing special (non-text) metadata.
Definition: id3v2.c:1062
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 flags
A combination of AV_PKT_FLAG values.
Definition: avcodec.h:1428
AVCodecContext * codec
Codec context associated with this stream.
Definition: avformat.h:861
unsigned char * buf
Buffer must have AVPROBE_PADDING_SIZE of extra allocated bytes filled with zero.
Definition: avformat.h:450
int seekable
A combination of AVIO_SEEKABLE_ flags or 0 when the stream is not seekable.
Definition: avio.h:160
int bit_rate
the average bitrate
Definition: avcodec.h:1566
#define FFMIN(a, b)
Definition: common.h:66
#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:78
static int read_probe(AVProbeData *pd)
Definition: jvdec.c:55
static int aiff_probe(AVProbeData *p)
Definition: aiffdec.c:188
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:620
Stream structure.
Definition: avformat.h:842
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
enum AVMediaType codec_type
Definition: avcodec.h:1509
enum AVCodecID codec_id
Definition: avcodec.h:1518
int sample_rate
samples per second
Definition: avcodec.h:2261
AVIOContext * pb
I/O context.
Definition: avformat.h:1315
main external API structure.
Definition: avcodec.h:1501
unsigned int codec_tag
fourcc (LSB first, so "ABCD" -> ('D'<<24) + ('C'<<16) + ('B'<<8) + 'A').
Definition: avcodec.h:1533
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:69
This structure contains the data a format has to probe a file.
Definition: avformat.h:448
int av_get_audio_frame_duration(AVCodecContext *avctx, int frame_bytes)
Return audio frame duration.
Definition: utils.c:3410
int64_t duration
Decoding: duration of the stream, in stream time base.
Definition: avformat.h:901
#define AVPROBE_SCORE_MAX
maximum score
Definition: avformat.h:460
Main libavformat public API header.
AVInputFormat ff_aiff_demuxer
Definition: aiffdec.c:387
int64_t start_time
Decoding: pts of the first frame of the stream in presentation order, in stream time base...
Definition: avformat.h:894
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:1056
int64_t nb_frames
number of frames in this stream if known or 0
Definition: avformat.h:903
#define AV_PKT_FLAG_CORRUPT
The packet content is corrupted.
Definition: avcodec.h:1469
unsigned bps
Definition: movenc.c:1335
#define AIFF
Definition: aiffdec.c:33
#define av_free(p)
as in Berlin toast format
Definition: avcodec.h:442
int channels
number of audio channels
Definition: avcodec.h:2262
void * priv_data
Format private data.
Definition: avformat.h:1301
common header for AIFF muxer and demuxer
const char * name
A comma separated list of short names for the format.
Definition: avformat.h:628
int avio_feof(AVIOContext *s)
feof() equivalent for AVIOContext.
Definition: aviobuf.c:301
int stream_index
Definition: avcodec.h:1424
#define MKTAG(a, b, c, d)
Definition: common.h:315
This structure stores compressed data.
Definition: avcodec.h:1399