FFmpeg  4.4.4
wvdec.c
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1 /*
2  * WavPack demuxer
3  * Copyright (c) 2006,2011 Konstantin Shishkov
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 
23 #include "libavutil/intreadwrite.h"
24 #include "libavutil/dict.h"
25 #include "avformat.h"
26 #include "internal.h"
27 #include "apetag.h"
28 #include "id3v1.h"
29 #include "wv.h"
30 
31 enum WV_FLAGS {
32  WV_MONO = 0x0004,
33  WV_HYBRID = 0x0008,
34  WV_JOINT = 0x0010,
35  WV_CROSSD = 0x0020,
36  WV_HSHAPE = 0x0040,
37  WV_FLOAT = 0x0080,
38  WV_INT32 = 0x0100,
39  WV_HBR = 0x0200,
40  WV_HBAL = 0x0400,
41  WV_MCINIT = 0x0800,
42  WV_MCEND = 0x1000,
43  WV_DSD = 0x80000000,
44 };
45 
46 static const int wv_rates[16] = {
47  6000, 8000, 9600, 11025, 12000, 16000, 22050, 24000,
48  32000, 44100, 48000, 64000, 88200, 96000, 192000, -1
49 };
50 
51 typedef struct WVContext {
54  int rate, chan, bpp;
55  uint32_t chmask;
58  int64_t pos;
59 
60  int64_t apetag_start;
61 } WVContext;
62 
63 static int wv_probe(const AVProbeData *p)
64 {
65  /* check file header */
66  if (p->buf_size <= 32)
67  return 0;
68  if (AV_RL32(&p->buf[0]) == MKTAG('w', 'v', 'p', 'k') &&
69  AV_RL32(&p->buf[4]) >= 24 &&
70  AV_RL32(&p->buf[4]) <= WV_BLOCK_LIMIT &&
71  AV_RL16(&p->buf[8]) >= 0x402 &&
72  AV_RL16(&p->buf[8]) <= 0x410)
73  return AVPROBE_SCORE_MAX;
74  else
75  return 0;
76 }
77 
79 {
80  WVContext *wc = ctx->priv_data;
81  int ret;
82  int rate, bpp, chan;
83  uint32_t chmask, flags;
84  unsigned rate_x;
85 
86  wc->pos = avio_tell(pb);
87 
88  /* don't return bogus packets with the ape tag data */
89  if (wc->apetag_start && wc->pos >= wc->apetag_start)
90  return AVERROR_EOF;
91 
92  ret = avio_read(pb, wc->block_header, WV_HEADER_SIZE);
93  if (ret != WV_HEADER_SIZE)
94  return (ret < 0) ? ret : AVERROR_EOF;
95 
96  ret = ff_wv_parse_header(&wc->header, wc->block_header);
97  if (ret < 0) {
98  av_log(ctx, AV_LOG_ERROR, "Invalid block header.\n");
99  return ret;
100  }
101 
102  if (wc->header.version < 0x402 || wc->header.version > 0x410) {
103  avpriv_report_missing_feature(ctx, "WV version 0x%03X",
104  wc->header.version);
105  return AVERROR_PATCHWELCOME;
106  }
107 
108  /* Blocks with zero samples don't contain actual audio information
109  * and should be ignored */
110  if (!wc->header.samples)
111  return 0;
112  // parse flags
113  flags = wc->header.flags;
114  rate_x = (flags & WV_DSD) ? 4 : 1;
115  bpp = (flags & WV_DSD) ? 0 : ((flags & 3) + 1) << 3;
116  chan = 1 + !(flags & WV_MONO);
118  rate = wv_rates[(flags >> 23) & 0xF];
119  wc->multichannel = !(wc->header.initial && wc->header.final);
120  if (wc->multichannel) {
121  chan = wc->chan;
122  chmask = wc->chmask;
123  }
124  if ((rate == -1 || !chan || flags & WV_DSD) && !wc->block_parsed) {
125  int64_t block_end = avio_tell(pb) + wc->header.blocksize;
126  if (!(pb->seekable & AVIO_SEEKABLE_NORMAL)) {
128  "Cannot determine additional parameters\n");
129  return AVERROR_INVALIDDATA;
130  }
131  while (avio_tell(pb) < block_end && !avio_feof(pb)) {
132  int id, size;
133  id = avio_r8(pb);
134  size = (id & 0x80) ? avio_rl24(pb) : avio_r8(pb);
135  size <<= 1;
136  if (id & 0x40)
137  size--;
138  switch (id & 0x3F) {
139  case 0xD:
140  if (size <= 1) {
142  "Insufficient channel information\n");
143  return AVERROR_INVALIDDATA;
144  }
145  chan = avio_r8(pb);
146  switch (size - 2) {
147  case 0:
148  chmask = avio_r8(pb);
149  break;
150  case 1:
151  chmask = avio_rl16(pb);
152  break;
153  case 2:
154  chmask = avio_rl24(pb);
155  break;
156  case 3:
157  chmask = avio_rl32(pb);
158  break;
159  case 4:
160  avio_skip(pb, 1);
161  chan |= (avio_r8(pb) & 0xF) << 8;
162  chan += 1;
163  chmask = avio_rl24(pb);
164  break;
165  case 5:
166  avio_skip(pb, 1);
167  chan |= (avio_r8(pb) & 0xF) << 8;
168  chan += 1;
169  chmask = avio_rl32(pb);
170  break;
171  default:
173  "Invalid channel info size %d\n", size);
174  return AVERROR_INVALIDDATA;
175  }
176  break;
177  case 0xE:
178  if (size <= 1) {
180  "Invalid DSD block\n");
181  return AVERROR_INVALIDDATA;
182  }
183  rate_x = 1U << (avio_r8(pb) & 0x1f);
184  if (size)
185  avio_skip(pb, size-1);
186  break;
187  case 0x27:
188  rate = avio_rl24(pb);
189  break;
190  default:
191  avio_skip(pb, size);
192  }
193  if (id & 0x40)
194  avio_skip(pb, 1);
195  }
196  if (rate == -1 || rate * (uint64_t)rate_x >= INT_MAX) {
198  "Cannot determine custom sampling rate\n");
199  return AVERROR_INVALIDDATA;
200  }
201  avio_seek(pb, block_end - wc->header.blocksize, SEEK_SET);
202  }
203  if (!wc->bpp)
204  wc->bpp = bpp;
205  if (!wc->chan)
206  wc->chan = chan;
207  if (!wc->chmask)
208  wc->chmask = chmask;
209  if (!wc->rate)
210  wc->rate = rate * rate_x;
211 
212  if (flags && bpp != wc->bpp) {
214  "Bits per sample differ, this block: %i, header block: %i\n",
215  bpp, wc->bpp);
216  return AVERROR_INVALIDDATA;
217  }
218  if (flags && !wc->multichannel && chan != wc->chan) {
220  "Channels differ, this block: %i, header block: %i\n",
221  chan, wc->chan);
222  return AVERROR_INVALIDDATA;
223  }
224  if (flags && rate != -1 && !(flags & WV_DSD) && rate * rate_x != wc->rate) {
226  "Sampling rate differ, this block: %i, header block: %i\n",
227  rate * rate_x, wc->rate);
228  return AVERROR_INVALIDDATA;
229  }
230  return 0;
231 }
232 
234 {
235  AVIOContext *pb = s->pb;
236  WVContext *wc = s->priv_data;
237  AVStream *st;
238  int ret;
239 
240  wc->block_parsed = 0;
241  for (;;) {
242  if ((ret = wv_read_block_header(s, pb)) < 0)
243  return ret;
244  if (!wc->header.samples)
245  avio_skip(pb, wc->header.blocksize);
246  else
247  break;
248  }
249 
250  /* now we are ready: build format streams */
251  st = avformat_new_stream(s, NULL);
252  if (!st)
253  return AVERROR(ENOMEM);
254  if ((ret = ff_alloc_extradata(st->codecpar, 2)) < 0)
255  return ret;
259  st->codecpar->channels = wc->chan;
260  st->codecpar->channel_layout = wc->chmask;
261  st->codecpar->sample_rate = wc->rate;
263  avpriv_set_pts_info(st, 64, 1, wc->rate);
264  st->start_time = 0;
265  if (wc->header.total_samples != 0xFFFFFFFFu)
266  st->duration = wc->header.total_samples;
267 
268  if (s->pb->seekable & AVIO_SEEKABLE_NORMAL) {
269  int64_t cur = avio_tell(s->pb);
271  if (!av_dict_get(s->metadata, "", NULL, AV_DICT_IGNORE_SUFFIX))
272  ff_id3v1_read(s);
273  avio_seek(s->pb, cur, SEEK_SET);
274  }
275 
276  return 0;
277 }
278 
280 {
281  WVContext *wc = s->priv_data;
282  int ret;
283  int off;
284  int64_t pos;
285  uint32_t block_samples;
286 
287  if (avio_feof(s->pb))
288  return AVERROR_EOF;
289  if (wc->block_parsed) {
290  if ((ret = wv_read_block_header(s, s->pb)) < 0)
291  return ret;
292  }
293 
294  pos = wc->pos;
295  if ((ret = av_new_packet(pkt, wc->header.blocksize + WV_HEADER_SIZE)) < 0)
296  return ret;
297  memcpy(pkt->data, wc->block_header, WV_HEADER_SIZE);
298  ret = avio_read(s->pb, pkt->data + WV_HEADER_SIZE, wc->header.blocksize);
299  if (ret != wc->header.blocksize) {
300  return AVERROR(EIO);
301  }
302  while (!(wc->header.flags & WV_FLAG_FINAL_BLOCK)) {
303  if ((ret = wv_read_block_header(s, s->pb)) < 0) {
304  return ret;
305  }
306 
307  off = pkt->size;
308  if ((ret = av_grow_packet(pkt, WV_HEADER_SIZE + wc->header.blocksize)) < 0) {
309  return ret;
310  }
311  memcpy(pkt->data + off, wc->block_header, WV_HEADER_SIZE);
312 
313  ret = avio_read(s->pb, pkt->data + off + WV_HEADER_SIZE, wc->header.blocksize);
314  if (ret != wc->header.blocksize) {
315  return (ret < 0) ? ret : AVERROR_EOF;
316  }
317  }
318  pkt->stream_index = 0;
319  pkt->pos = pos;
320  wc->block_parsed = 1;
321  pkt->pts = wc->header.block_idx;
322  block_samples = wc->header.samples;
323  if (block_samples > INT32_MAX)
325  "Too many samples in block: %"PRIu32"\n", block_samples);
326  else
327  pkt->duration = block_samples;
328 
329  return 0;
330 }
331 
333  .name = "wv",
334  .long_name = NULL_IF_CONFIG_SMALL("WavPack"),
335  .priv_data_size = sizeof(WVContext),
336  .read_probe = wv_probe,
340 };
int64_t ff_ape_parse_tag(AVFormatContext *s)
Read and parse an APE tag.
Definition: apetag.c:118
uint8_t
Main libavformat public API header.
#define AVPROBE_SCORE_MAX
maximum score
Definition: avformat.h:453
#define AVFMT_GENERIC_INDEX
Use generic index building code.
Definition: avformat.h:463
int64_t avio_seek(AVIOContext *s, int64_t offset, int whence)
fseek() equivalent for AVIOContext.
Definition: aviobuf.c:253
#define AVIO_SEEKABLE_NORMAL
Seeking works like for a local file.
Definition: avio.h:40
int avio_feof(AVIOContext *s)
Similar to feof() but also returns nonzero on read errors.
Definition: aviobuf.c:364
static av_always_inline int64_t avio_tell(AVIOContext *s)
ftell() equivalent for AVIOContext.
Definition: avio.h:557
unsigned int avio_rl16(AVIOContext *s)
Definition: aviobuf.c:734
int64_t avio_skip(AVIOContext *s, int64_t offset)
Skip given number of bytes forward.
Definition: aviobuf.c:337
int avio_read(AVIOContext *s, unsigned char *buf, int size)
Read size bytes from AVIOContext into buf.
Definition: aviobuf.c:633
unsigned int avio_rl32(AVIOContext *s)
Definition: aviobuf.c:750
unsigned int avio_rl24(AVIOContext *s)
Definition: aviobuf.c:742
int avio_r8(AVIOContext *s)
Definition: aviobuf.c:624
static int read_packet(void *opaque, uint8_t *buf, int buf_size)
Definition: avio_reading.c:42
#define AV_RL16
Definition: intreadwrite.h:42
#define AV_RL32
Definition: intreadwrite.h:146
#define flags(name, subs,...)
Definition: cbs_av1.c:561
#define s(width, name)
Definition: cbs_vp9.c:257
audio channel layout utility functions
#define MKTAG(a, b, c, d)
Definition: common.h:478
#define NULL
Definition: coverity.c:32
Public dictionary API.
enum AVCodecID id
static int read_header(FFV1Context *f)
Definition: ffv1dec.c:545
#define AV_CH_LAYOUT_MONO
#define AV_CH_LAYOUT_STEREO
@ AV_CODEC_ID_WAVPACK
Definition: codec_id.h:449
int av_grow_packet(AVPacket *pkt, int grow_by)
Increase packet size, correctly zeroing padding.
Definition: avpacket.c:122
int av_new_packet(AVPacket *pkt, int size)
Allocate the payload of a packet and initialize its fields with default values.
Definition: avpacket.c:99
AVStream * avformat_new_stream(AVFormatContext *s, const AVCodec *c)
Add a new stream to a media file.
Definition: utils.c:4509
#define AV_DICT_IGNORE_SUFFIX
Return first entry in a dictionary whose first part corresponds to the search key,...
Definition: dict.h:70
AVDictionaryEntry * av_dict_get(const AVDictionary *m, const char *key, const AVDictionaryEntry *prev, int flags)
Get a dictionary entry with matching key.
Definition: dict.c:40
#define AVERROR_PATCHWELCOME
Not yet implemented in FFmpeg, patches welcome.
Definition: error.h:62
#define AVERROR_INVALIDDATA
Invalid data found when processing input.
Definition: error.h:59
#define AVERROR_EOF
End of file.
Definition: error.h:55
#define AVERROR(e)
Definition: error.h:43
#define AV_LOG_WARNING
Something somehow does not look correct.
Definition: log.h:200
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
Definition: log.h:194
@ AVMEDIA_TYPE_AUDIO
Definition: avutil.h:202
void ff_id3v1_read(AVFormatContext *s)
Read an ID3v1 tag.
Definition: id3v1.c:279
#define AV_WL16(p, v)
Definition: intreadwrite.h:412
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:4945
int ff_alloc_extradata(AVCodecParameters *par, int size)
Allocate extradata with additional AV_INPUT_BUFFER_PADDING_SIZE at end which is always set to 0.
Definition: utils.c:3314
static int read_probe(const AVProbeData *pd)
Definition: jvdec.c:55
common internal API header
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification.
Definition: internal.h:117
void avpriv_report_missing_feature(void *avc, const char *msg,...) av_printf_format(2
Log a generic warning message about a missing feature.
unsigned int pos
Definition: spdifenc.c:412
uint64_t channel_layout
Audio only.
Definition: codec_par.h:162
int bits_per_coded_sample
The number of bits per sample in the codedwords.
Definition: codec_par.h:102
int channels
Audio only.
Definition: codec_par.h:166
enum AVMediaType codec_type
General type of the encoded data.
Definition: codec_par.h:56
uint8_t * extradata
Extra binary data needed for initializing the decoder, codec-dependent.
Definition: codec_par.h:74
enum AVCodecID codec_id
Specific type of the encoded data (the codec used).
Definition: codec_par.h:60
int sample_rate
Audio only.
Definition: codec_par.h:170
Format I/O context.
Definition: avformat.h:1232
void * priv_data
Format private data.
Definition: avformat.h:1260
Bytestream IO Context.
Definition: avio.h:161
int seekable
A combination of AVIO_SEEKABLE_ flags or 0 when the stream is not seekable.
Definition: avio.h:260
const char * name
A comma separated list of short names for the format.
Definition: avformat.h:645
This structure stores compressed data.
Definition: packet.h:346
int stream_index
Definition: packet.h:371
int size
Definition: packet.h:370
int64_t duration
Duration of this packet in AVStream->time_base units, 0 if unknown.
Definition: packet.h:387
int64_t pts
Presentation timestamp in AVStream->time_base units; the time at which the decompressed packet will b...
Definition: packet.h:362
uint8_t * data
Definition: packet.h:369
int64_t pos
byte position in stream, -1 if unknown
Definition: packet.h:389
This structure contains the data a format has to probe a file.
Definition: avformat.h:441
int buf_size
Size of buf except extra allocated bytes.
Definition: avformat.h:444
unsigned char * buf
Buffer must have AVPROBE_PADDING_SIZE of extra allocated bytes filled with zero.
Definition: avformat.h:443
Stream structure.
Definition: avformat.h:873
AVCodecParameters * codecpar
Codec parameters associated with this stream.
Definition: avformat.h:1038
int64_t duration
Decoding: duration of the stream, in stream time base.
Definition: avformat.h:922
int64_t start_time
Decoding: pts of the first frame of the stream in presentation order, in stream time base.
Definition: avformat.h:912
int64_t pos
Definition: wvdec.c:58
uint32_t chmask
Definition: wvdec.c:55
int multichannel
Definition: wvdec.c:56
int block_parsed
Definition: wvdec.c:57
int64_t apetag_start
Definition: wvdec.c:60
int chan
Definition: wvdec.c:54
WvHeader header
Definition: wvdec.c:53
int rate
Definition: wvdec.c:54
uint8_t block_header[WV_HEADER_SIZE]
Definition: wvdec.c:52
int bpp
Definition: wvdec.c:54
Definition: wv.h:34
uint32_t total_samples
Definition: wv.h:37
uint32_t block_idx
Definition: wv.h:38
int final
Definition: wv.h:43
int initial
Definition: wv.h:43
uint32_t samples
Definition: wv.h:39
uint32_t flags
Definition: wv.h:40
uint16_t version
Definition: wv.h:36
uint32_t blocksize
Definition: wv.h:35
#define av_log(a,...)
AVPacket * pkt
Definition: movenc.c:59
AVFormatContext * ctx
Definition: movenc.c:48
int size
#define WV_HEADER_SIZE
Definition: wavpack.h:30
int ff_wv_parse_header(WvHeader *wv, const uint8_t *data)
Parse a WavPack block header.
Definition: wv.c:29
#define WV_FLAG_FINAL_BLOCK
Definition: wv.h:29
#define WV_BLOCK_LIMIT
Definition: wv.h:32
static int wv_read_packet(AVFormatContext *s, AVPacket *pkt)
Definition: wvdec.c:279
WV_FLAGS
Definition: wvdec.c:31
@ WV_FLOAT
Definition: wvdec.c:37
@ WV_HYBRID
Definition: wvdec.c:33
@ WV_MONO
Definition: wvdec.c:32
@ WV_JOINT
Definition: wvdec.c:34
@ WV_INT32
Definition: wvdec.c:38
@ WV_HSHAPE
Definition: wvdec.c:36
@ WV_MCEND
Definition: wvdec.c:42
@ WV_DSD
Definition: wvdec.c:43
@ WV_HBR
Definition: wvdec.c:39
@ WV_HBAL
Definition: wvdec.c:40
@ WV_MCINIT
Definition: wvdec.c:41
@ WV_CROSSD
Definition: wvdec.c:35
static const int wv_rates[16]
Definition: wvdec.c:46
static int wv_read_header(AVFormatContext *s)
Definition: wvdec.c:233
AVInputFormat ff_wv_demuxer
Definition: wvdec.c:332
static int wv_read_block_header(AVFormatContext *ctx, AVIOContext *pb)
Definition: wvdec.c:78
static int wv_probe(const AVProbeData *p)
Definition: wvdec.c:63