FFmpeg  4.2.1
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 
85  wc->pos = avio_tell(pb);
86 
87  /* don't return bogus packets with the ape tag data */
88  if (wc->apetag_start && wc->pos >= wc->apetag_start)
89  return AVERROR_EOF;
90 
91  ret = avio_read(pb, wc->block_header, WV_HEADER_SIZE);
92  if (ret != WV_HEADER_SIZE)
93  return (ret < 0) ? ret : AVERROR_EOF;
94 
95  ret = ff_wv_parse_header(&wc->header, wc->block_header);
96  if (ret < 0) {
97  av_log(ctx, AV_LOG_ERROR, "Invalid block header.\n");
98  return ret;
99  }
100 
101  if (wc->header.flags & WV_DSD) {
102  avpriv_report_missing_feature(ctx, "WV DSD");
103  return AVERROR_PATCHWELCOME;
104  }
105 
106  if (wc->header.version < 0x402 || wc->header.version > 0x410) {
107  avpriv_report_missing_feature(ctx, "WV version 0x%03X",
108  wc->header.version);
109  return AVERROR_PATCHWELCOME;
110  }
111 
112  /* Blocks with zero samples don't contain actual audio information
113  * and should be ignored */
114  if (!wc->header.samples)
115  return 0;
116  // parse flags
117  flags = wc->header.flags;
118  bpp = ((flags & 3) + 1) << 3;
119  chan = 1 + !(flags & WV_MONO);
120  chmask = flags & WV_MONO ? AV_CH_LAYOUT_MONO : AV_CH_LAYOUT_STEREO;
121  rate = wv_rates[(flags >> 23) & 0xF];
122  wc->multichannel = !(wc->header.initial && wc->header.final);
123  if (wc->multichannel) {
124  chan = wc->chan;
125  chmask = wc->chmask;
126  }
127  if ((rate == -1 || !chan) && !wc->block_parsed) {
128  int64_t block_end = avio_tell(pb) + wc->header.blocksize;
129  if (!(pb->seekable & AVIO_SEEKABLE_NORMAL)) {
130  av_log(ctx, AV_LOG_ERROR,
131  "Cannot determine additional parameters\n");
132  return AVERROR_INVALIDDATA;
133  }
134  while (avio_tell(pb) < block_end && !avio_feof(pb)) {
135  int id, size;
136  id = avio_r8(pb);
137  size = (id & 0x80) ? avio_rl24(pb) : avio_r8(pb);
138  size <<= 1;
139  if (id & 0x40)
140  size--;
141  switch (id & 0x3F) {
142  case 0xD:
143  if (size <= 1) {
144  av_log(ctx, AV_LOG_ERROR,
145  "Insufficient channel information\n");
146  return AVERROR_INVALIDDATA;
147  }
148  chan = avio_r8(pb);
149  switch (size - 2) {
150  case 0:
151  chmask = avio_r8(pb);
152  break;
153  case 1:
154  chmask = avio_rl16(pb);
155  break;
156  case 2:
157  chmask = avio_rl24(pb);
158  break;
159  case 3:
160  chmask = avio_rl32(pb);
161  break;
162  case 4:
163  avio_skip(pb, 1);
164  chan |= (avio_r8(pb) & 0xF) << 8;
165  chan += 1;
166  chmask = avio_rl24(pb);
167  break;
168  case 5:
169  avio_skip(pb, 1);
170  chan |= (avio_r8(pb) & 0xF) << 8;
171  chan += 1;
172  chmask = avio_rl32(pb);
173  break;
174  default:
175  av_log(ctx, AV_LOG_ERROR,
176  "Invalid channel info size %d\n", size);
177  return AVERROR_INVALIDDATA;
178  }
179  break;
180  case 0x27:
181  rate = avio_rl24(pb);
182  break;
183  default:
184  avio_skip(pb, size);
185  }
186  if (id & 0x40)
187  avio_skip(pb, 1);
188  }
189  if (rate == -1) {
190  av_log(ctx, AV_LOG_ERROR,
191  "Cannot determine custom sampling rate\n");
192  return AVERROR_INVALIDDATA;
193  }
194  avio_seek(pb, block_end - wc->header.blocksize, SEEK_SET);
195  }
196  if (!wc->bpp)
197  wc->bpp = bpp;
198  if (!wc->chan)
199  wc->chan = chan;
200  if (!wc->chmask)
201  wc->chmask = chmask;
202  if (!wc->rate)
203  wc->rate = rate;
204 
205  if (flags && bpp != wc->bpp) {
206  av_log(ctx, AV_LOG_ERROR,
207  "Bits per sample differ, this block: %i, header block: %i\n",
208  bpp, wc->bpp);
209  return AVERROR_INVALIDDATA;
210  }
211  if (flags && !wc->multichannel && chan != wc->chan) {
212  av_log(ctx, AV_LOG_ERROR,
213  "Channels differ, this block: %i, header block: %i\n",
214  chan, wc->chan);
215  return AVERROR_INVALIDDATA;
216  }
217  if (flags && rate != -1 && rate != wc->rate) {
218  av_log(ctx, AV_LOG_ERROR,
219  "Sampling rate differ, this block: %i, header block: %i\n",
220  rate, wc->rate);
221  return AVERROR_INVALIDDATA;
222  }
223  return 0;
224 }
225 
227 {
228  AVIOContext *pb = s->pb;
229  WVContext *wc = s->priv_data;
230  AVStream *st;
231  int ret;
232 
233  wc->block_parsed = 0;
234  for (;;) {
235  if ((ret = wv_read_block_header(s, pb)) < 0)
236  return ret;
237  if (!wc->header.samples)
238  avio_skip(pb, wc->header.blocksize);
239  else
240  break;
241  }
242 
243  /* now we are ready: build format streams */
244  st = avformat_new_stream(s, NULL);
245  if (!st)
246  return AVERROR(ENOMEM);
249  st->codecpar->channels = wc->chan;
250  st->codecpar->channel_layout = wc->chmask;
251  st->codecpar->sample_rate = wc->rate;
253  avpriv_set_pts_info(st, 64, 1, wc->rate);
254  st->start_time = 0;
255  if (wc->header.total_samples != 0xFFFFFFFFu)
256  st->duration = wc->header.total_samples;
257 
258  if (s->pb->seekable & AVIO_SEEKABLE_NORMAL) {
259  int64_t cur = avio_tell(s->pb);
262  ff_id3v1_read(s);
263  avio_seek(s->pb, cur, SEEK_SET);
264  }
265 
266  return 0;
267 }
268 
270 {
271  WVContext *wc = s->priv_data;
272  int ret;
273  int off;
274  int64_t pos;
275  uint32_t block_samples;
276 
277  if (avio_feof(s->pb))
278  return AVERROR_EOF;
279  if (wc->block_parsed) {
280  if ((ret = wv_read_block_header(s, s->pb)) < 0)
281  return ret;
282  }
283 
284  pos = wc->pos;
285  if (av_new_packet(pkt, wc->header.blocksize + WV_HEADER_SIZE) < 0)
286  return AVERROR(ENOMEM);
287  memcpy(pkt->data, wc->block_header, WV_HEADER_SIZE);
288  ret = avio_read(s->pb, pkt->data + WV_HEADER_SIZE, wc->header.blocksize);
289  if (ret != wc->header.blocksize) {
290  av_packet_unref(pkt);
291  return AVERROR(EIO);
292  }
293  while (!(wc->header.flags & WV_FLAG_FINAL_BLOCK)) {
294  if ((ret = wv_read_block_header(s, s->pb)) < 0) {
295  av_packet_unref(pkt);
296  return ret;
297  }
298 
299  off = pkt->size;
300  if ((ret = av_grow_packet(pkt, WV_HEADER_SIZE + wc->header.blocksize)) < 0) {
301  av_packet_unref(pkt);
302  return ret;
303  }
304  memcpy(pkt->data + off, wc->block_header, WV_HEADER_SIZE);
305 
306  ret = avio_read(s->pb, pkt->data + off + WV_HEADER_SIZE, wc->header.blocksize);
307  if (ret != wc->header.blocksize) {
308  av_packet_unref(pkt);
309  return (ret < 0) ? ret : AVERROR_EOF;
310  }
311  }
312  pkt->stream_index = 0;
313  pkt->pos = pos;
314  wc->block_parsed = 1;
315  pkt->pts = wc->header.block_idx;
316  block_samples = wc->header.samples;
317  if (block_samples > INT32_MAX)
319  "Too many samples in block: %"PRIu32"\n", block_samples);
320  else
321  pkt->duration = block_samples;
322 
323  return 0;
324 }
325 
327  .name = "wv",
328  .long_name = NULL_IF_CONFIG_SMALL("WavPack"),
329  .priv_data_size = sizeof(WVContext),
330  .read_probe = wv_probe,
334 };
int64_t pos
Definition: wvdec.c:58
#define NULL
Definition: coverity.c:32
int block_parsed
Definition: wvdec.c:57
Bytestream IO Context.
Definition: avio.h:161
#define AVERROR_INVALIDDATA
Invalid data found when processing input.
Definition: error.h:59
uint8_t block_header[WV_HEADER_SIZE]
Definition: wvdec.c:52
int size
uint32_t samples
Definition: wv.h:39
int initial
Definition: wv.h:43
#define AV_LOG_WARNING
Something somehow does not look correct.
Definition: log.h:182
int64_t pos
byte position in stream, -1 if unknown
Definition: avcodec.h:1497
int rate
Definition: wvdec.c:54
Definition: wvdec.c:32
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:4886
enum AVCodecID codec_id
Specific type of the encoded data (the codec used).
Definition: avcodec.h:3957
void ff_id3v1_read(AVFormatContext *s)
Read an ID3v1 tag.
Definition: id3v1.c:235
int size
Definition: avcodec.h:1478
int64_t avio_seek(AVIOContext *s, int64_t offset, int whence)
fseek() equivalent for AVIOContext.
Definition: aviobuf.c:246
#define WV_BLOCK_LIMIT
Definition: wv.h:32
static int wv_read_packet(AVFormatContext *s, AVPacket *pkt)
Definition: wvdec.c:269
#define AV_RL16
Definition: intreadwrite.h:42
int64_t avio_skip(AVIOContext *s, int64_t offset)
Skip given number of bytes forward.
Definition: aviobuf.c:331
static AVPacket pkt
#define AV_CH_LAYOUT_STEREO
int multichannel
Definition: wvdec.c:56
Format I/O context.
Definition: avformat.h:1358
Public dictionary API.
uint8_t
uint32_t flags
Definition: wv.h:40
int64_t duration
Duration of this packet in AVStream->time_base units, 0 if unknown.
Definition: avcodec.h:1495
AVStream * avformat_new_stream(AVFormatContext *s, const AVCodec *c)
Add a new stream to a media file.
Definition: utils.c:4459
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
uint8_t * data
Definition: avcodec.h:1477
#define AVERROR_EOF
End of file.
Definition: error.h:55
#define WV_HEADER_SIZE
Definition: wavpack.h:30
static av_always_inline int64_t avio_tell(AVIOContext *s)
ftell() equivalent for AVIOContext.
Definition: avio.h:557
Definition: wv.h:34
uint64_t channel_layout
Audio only.
Definition: avcodec.h:4059
#define av_log(a,...)
int avio_read(AVIOContext *s, unsigned char *buf, int size)
Read size bytes from AVIOContext into buf.
Definition: aviobuf.c:647
WV_FLAGS
Definition: wvdec.c:31
int av_new_packet(AVPacket *pkt, int size)
Allocate the payload of a packet and initialize its fields with default values.
Definition: avpacket.c:86
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
Definition: log.h:176
AVDictionary * metadata
Metadata that applies to the whole file.
Definition: avformat.h:1598
AVInputFormat ff_wv_demuxer
Definition: wvdec.c:326
unsigned int avio_rl32(AVIOContext *s)
Definition: aviobuf.c:769
#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:186
enum AVMediaType codec_type
General type of the encoded data.
Definition: avcodec.h:3953
int final
Definition: wv.h:43
int64_t ff_ape_parse_tag(AVFormatContext *s)
Read and parse an APE tag.
Definition: apetag.c:118
int avio_r8(AVIOContext *s)
Definition: aviobuf.c:638
int buf_size
Size of buf except extra allocated bytes.
Definition: avformat.h:449
unsigned char * buf
Buffer must have AVPROBE_PADDING_SIZE of extra allocated bytes filled with zero.
Definition: avformat.h:448
uint16_t version
Definition: wv.h:36
int seekable
A combination of AVIO_SEEKABLE_ flags or 0 when the stream is not seekable.
Definition: avio.h:260
audio channel layout utility functions
Definition: wvdec.c:39
Definition: wvdec.c:43
static const int wv_rates[16]
Definition: wvdec.c:46
int ff_wv_parse_header(WvHeader *wv, const uint8_t *data)
Parse a WavPack block header.
Definition: wv.c:29
AVFormatContext * ctx
Definition: movenc.c:48
int bpp
Definition: wvdec.c:54
#define s(width, name)
Definition: cbs_vp9.c:257
int64_t apetag_start
Definition: wvdec.c:60
#define AV_RL32
Definition: intreadwrite.h:146
WvHeader header
Definition: wvdec.c:53
Definition: wvdec.c:34
static int read_header(FFV1Context *f)
Definition: ffv1dec.c:530
Stream structure.
Definition: avformat.h:881
#define AVERROR_PATCHWELCOME
Not yet implemented in FFmpeg, patches welcome.
Definition: error.h:62
static int read_packet(void *opaque, uint8_t *buf, int buf_size)
Definition: avio_reading.c:42
#define AVIO_SEEKABLE_NORMAL
Seeking works like for a local file.
Definition: avio.h:40
static int wv_probe(const AVProbeData *p)
Definition: wvdec.c:63
AVIOContext * pb
I/O context.
Definition: avformat.h:1400
void av_packet_unref(AVPacket *pkt)
Wipe the packet.
Definition: avpacket.c:599
#define AVFMT_GENERIC_INDEX
Use generic index building code.
Definition: avformat.h:468
uint32_t total_samples
Definition: wv.h:37
int chan
Definition: wvdec.c:54
uint32_t chmask
Definition: wvdec.c:55
This structure contains the data a format has to probe a file.
Definition: avformat.h:446
void avpriv_report_missing_feature(void *avc, const char *msg,...) av_printf_format(2
Log a generic warning message about a missing feature.
uint32_t block_idx
Definition: wv.h:38
#define flags(name, subs,...)
Definition: cbs_av1.c:561
static int read_probe(const AVProbeData *pd)
Definition: jvdec.c:55
int64_t duration
Decoding: duration of the stream, in stream time base.
Definition: avformat.h:930
int sample_rate
Audio only.
Definition: avcodec.h:4067
#define AVPROBE_SCORE_MAX
maximum score
Definition: avformat.h:458
unsigned int avio_rl16(AVIOContext *s)
Definition: aviobuf.c:753
Main libavformat public API header.
Definition: wvdec.c:40
int64_t start_time
Decoding: pts of the first frame of the stream in presentation order, in stream time base...
Definition: avformat.h:920
static int wv_read_header(AVFormatContext *s)
Definition: wvdec.c:226
int av_grow_packet(AVPacket *pkt, int grow_by)
Increase packet size, correctly zeroing padding.
Definition: avpacket.c:109
Definition: wvdec.c:38
Definition: wvdec.c:37
void * priv_data
Format private data.
Definition: avformat.h:1386
int bits_per_coded_sample
The number of bits per sample in the codedwords.
Definition: avcodec.h:3999
int channels
Audio only.
Definition: avcodec.h:4063
const char * name
A comma separated list of short names for the format.
Definition: avformat.h:654
#define AV_DICT_IGNORE_SUFFIX
Return first entry in a dictionary whose first part corresponds to the search key, ignoring the suffix of the found key string.
Definition: dict.h:70
AVCodecParameters * codecpar
Codec parameters associated with this stream.
Definition: avformat.h:1028
Definition: wvdec.c:42
int avio_feof(AVIOContext *s)
Similar to feof() but also returns nonzero on read errors.
Definition: aviobuf.c:358
unsigned int avio_rl24(AVIOContext *s)
Definition: aviobuf.c:761
int stream_index
Definition: avcodec.h:1479
static int wv_read_block_header(AVFormatContext *ctx, AVIOContext *pb)
Definition: wvdec.c:78
#define AV_CH_LAYOUT_MONO
#define MKTAG(a, b, c, d)
Definition: common.h:366
enum AVCodecID id
This structure stores compressed data.
Definition: avcodec.h:1454
#define WV_FLAG_FINAL_BLOCK
Definition: wv.h:29
uint32_t blocksize
Definition: wv.h:35
int64_t pts
Presentation timestamp in AVStream->time_base units; the time at which the decompressed packet will b...
Definition: avcodec.h:1470