FFmpeg  4.3
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, rate_x, 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 
92  if (ret != WV_HEADER_SIZE)
93  return (ret < 0) ? ret : AVERROR_EOF;
94 
96  if (ret < 0) {
97  av_log(ctx, AV_LOG_ERROR, "Invalid block header.\n");
98  return ret;
99  }
100 
101  if (wc->header.version < 0x402 || wc->header.version > 0x410) {
102  avpriv_report_missing_feature(ctx, "WV version 0x%03X",
103  wc->header.version);
104  return AVERROR_PATCHWELCOME;
105  }
106 
107  /* Blocks with zero samples don't contain actual audio information
108  * and should be ignored */
109  if (!wc->header.samples)
110  return 0;
111  // parse flags
112  flags = wc->header.flags;
113  rate_x = (flags & WV_DSD) ? 4 : 1;
114  bpp = (flags & WV_DSD) ? 0 : ((flags & 3) + 1) << 3;
115  chan = 1 + !(flags & WV_MONO);
117  rate = wv_rates[(flags >> 23) & 0xF];
118  wc->multichannel = !(wc->header.initial && wc->header.final);
119  if (wc->multichannel) {
120  chan = wc->chan;
121  chmask = wc->chmask;
122  }
123  if ((rate == -1 || !chan || flags & WV_DSD) && !wc->block_parsed) {
124  int64_t block_end = avio_tell(pb) + wc->header.blocksize;
125  if (!(pb->seekable & AVIO_SEEKABLE_NORMAL)) {
127  "Cannot determine additional parameters\n");
128  return AVERROR_INVALIDDATA;
129  }
130  while (avio_tell(pb) < block_end && !avio_feof(pb)) {
131  int id, size;
132  id = avio_r8(pb);
133  size = (id & 0x80) ? avio_rl24(pb) : avio_r8(pb);
134  size <<= 1;
135  if (id & 0x40)
136  size--;
137  switch (id & 0x3F) {
138  case 0xD:
139  if (size <= 1) {
141  "Insufficient channel information\n");
142  return AVERROR_INVALIDDATA;
143  }
144  chan = avio_r8(pb);
145  switch (size - 2) {
146  case 0:
147  chmask = avio_r8(pb);
148  break;
149  case 1:
150  chmask = avio_rl16(pb);
151  break;
152  case 2:
153  chmask = avio_rl24(pb);
154  break;
155  case 3:
156  chmask = avio_rl32(pb);
157  break;
158  case 4:
159  avio_skip(pb, 1);
160  chan |= (avio_r8(pb) & 0xF) << 8;
161  chan += 1;
162  chmask = avio_rl24(pb);
163  break;
164  case 5:
165  avio_skip(pb, 1);
166  chan |= (avio_r8(pb) & 0xF) << 8;
167  chan += 1;
168  chmask = avio_rl32(pb);
169  break;
170  default:
172  "Invalid channel info size %d\n", size);
173  return AVERROR_INVALIDDATA;
174  }
175  break;
176  case 0xE:
177  if (size <= 1) {
179  "Invalid DSD block\n");
180  return AVERROR_INVALIDDATA;
181  }
182  rate_x = 1U << (avio_r8(pb) & 0x1f);
183  if (size)
184  avio_skip(pb, size-1);
185  break;
186  case 0x27:
187  rate = avio_rl24(pb);
188  break;
189  default:
190  avio_skip(pb, size);
191  }
192  if (id & 0x40)
193  avio_skip(pb, 1);
194  }
195  if (rate == -1) {
197  "Cannot determine custom sampling rate\n");
198  return AVERROR_INVALIDDATA;
199  }
200  avio_seek(pb, block_end - wc->header.blocksize, SEEK_SET);
201  }
202  if (!wc->bpp)
203  wc->bpp = bpp;
204  if (!wc->chan)
205  wc->chan = chan;
206  if (!wc->chmask)
207  wc->chmask = chmask;
208  if (!wc->rate)
209  wc->rate = rate * rate_x;
210 
211  if (flags && bpp != wc->bpp) {
213  "Bits per sample differ, this block: %i, header block: %i\n",
214  bpp, wc->bpp);
215  return AVERROR_INVALIDDATA;
216  }
217  if (flags && !wc->multichannel && chan != wc->chan) {
219  "Channels differ, this block: %i, header block: %i\n",
220  chan, wc->chan);
221  return AVERROR_INVALIDDATA;
222  }
223  if (flags && rate != -1 && !(flags & WV_DSD) && rate * rate_x != wc->rate) {
225  "Sampling rate differ, this block: %i, header block: %i\n",
226  rate * rate_x, wc->rate);
227  return AVERROR_INVALIDDATA;
228  }
229  return 0;
230 }
231 
233 {
234  AVIOContext *pb = s->pb;
235  WVContext *wc = s->priv_data;
236  AVStream *st;
237  int ret;
238 
239  wc->block_parsed = 0;
240  for (;;) {
241  if ((ret = wv_read_block_header(s, pb)) < 0)
242  return ret;
243  if (!wc->header.samples)
244  avio_skip(pb, wc->header.blocksize);
245  else
246  break;
247  }
248 
249  /* now we are ready: build format streams */
250  st = avformat_new_stream(s, NULL);
251  if (!st)
252  return AVERROR(ENOMEM);
253  if ((ret = ff_alloc_extradata(st->codecpar, 2)) < 0)
254  return ret;
258  st->codecpar->channels = wc->chan;
259  st->codecpar->channel_layout = wc->chmask;
260  st->codecpar->sample_rate = wc->rate;
262  avpriv_set_pts_info(st, 64, 1, wc->rate);
263  st->start_time = 0;
264  if (wc->header.total_samples != 0xFFFFFFFFu)
265  st->duration = wc->header.total_samples;
266 
267  if (s->pb->seekable & AVIO_SEEKABLE_NORMAL) {
268  int64_t cur = avio_tell(s->pb);
270  if (!av_dict_get(s->metadata, "", NULL, AV_DICT_IGNORE_SUFFIX))
271  ff_id3v1_read(s);
272  avio_seek(s->pb, cur, SEEK_SET);
273  }
274 
275  return 0;
276 }
277 
279 {
280  WVContext *wc = s->priv_data;
281  int ret;
282  int off;
283  int64_t pos;
284  uint32_t block_samples;
285 
286  if (avio_feof(s->pb))
287  return AVERROR_EOF;
288  if (wc->block_parsed) {
289  if ((ret = wv_read_block_header(s, s->pb)) < 0)
290  return ret;
291  }
292 
293  pos = wc->pos;
294  if ((ret = av_new_packet(pkt, wc->header.blocksize + WV_HEADER_SIZE)) < 0)
295  return ret;
296  memcpy(pkt->data, wc->block_header, WV_HEADER_SIZE);
298  if (ret != wc->header.blocksize) {
299  return AVERROR(EIO);
300  }
301  while (!(wc->header.flags & WV_FLAG_FINAL_BLOCK)) {
302  if ((ret = wv_read_block_header(s, s->pb)) < 0) {
303  return ret;
304  }
305 
306  off = pkt->size;
307  if ((ret = av_grow_packet(pkt, WV_HEADER_SIZE + wc->header.blocksize)) < 0) {
308  return ret;
309  }
310  memcpy(pkt->data + off, wc->block_header, WV_HEADER_SIZE);
311 
312  ret = avio_read(s->pb, pkt->data + off + WV_HEADER_SIZE, wc->header.blocksize);
313  if (ret != wc->header.blocksize) {
314  return (ret < 0) ? ret : AVERROR_EOF;
315  }
316  }
317  pkt->stream_index = 0;
318  pkt->pos = pos;
319  wc->block_parsed = 1;
320  pkt->pts = wc->header.block_idx;
321  block_samples = wc->header.samples;
322  if (block_samples > INT32_MAX)
324  "Too many samples in block: %"PRIu32"\n", block_samples);
325  else
326  pkt->duration = block_samples;
327 
328  return 0;
329 }
330 
332  .name = "wv",
333  .long_name = NULL_IF_CONFIG_SMALL("WavPack"),
334  .priv_data_size = sizeof(WVContext),
335  .read_probe = wv_probe,
339 };
WvHeader::total_samples
uint32_t total_samples
Definition: wv.h:37
AV_LOG_WARNING
#define AV_LOG_WARNING
Something somehow does not look correct.
Definition: log.h:182
AVCodecParameters::extradata
uint8_t * extradata
Extra binary data needed for initializing the decoder, codec-dependent.
Definition: codec_par.h:74
WV_FLOAT
@ WV_FLOAT
Definition: wvdec.c:37
WV_MCEND
@ WV_MCEND
Definition: wvdec.c:42
AVERROR
Filter the word “frame” indicates either a video frame or a group of audio as stored in an AVFrame structure Format for each input and each output the list of supported formats For video that means pixel format For audio that means channel sample they are references to shared objects When the negotiation mechanism computes the intersection of the formats supported at each end of a all references to both lists are replaced with a reference to the intersection And when a single format is eventually chosen for a link amongst the remaining all references to the list are updated That means that if a filter requires that its input and output have the same format amongst a supported all it has to do is use a reference to the same list of formats query_formats can leave some formats unset and return AVERROR(EAGAIN) to cause the negotiation mechanism toagain later. That can be used by filters with complex requirements to use the format negotiated on one link to set the formats supported on another. Frame references ownership and permissions
avformat_new_stream
AVStream * avformat_new_stream(AVFormatContext *s, const AVCodec *c)
Add a new stream to a media file.
Definition: utils.c:4519
AVCodecParameters::codec_type
enum AVMediaType codec_type
General type of the encoded data.
Definition: codec_par.h:56
WV_BLOCK_LIMIT
#define WV_BLOCK_LIMIT
Definition: wv.h:32
AVERROR_EOF
#define AVERROR_EOF
End of file.
Definition: error.h:55
MKTAG
#define MKTAG(a, b, c, d)
Definition: common.h:406
AV_CH_LAYOUT_MONO
#define AV_CH_LAYOUT_MONO
Definition: channel_layout.h:85
wv_read_header
static int wv_read_header(AVFormatContext *s)
Definition: wvdec.c:232
av_grow_packet
int av_grow_packet(AVPacket *pkt, int grow_by)
Increase packet size, correctly zeroing padding.
Definition: avpacket.c:111
wv_read_packet
static int wv_read_packet(AVFormatContext *s, AVPacket *pkt)
Definition: wvdec.c:278
apetag.h
WvHeader::samples
uint32_t samples
Definition: wv.h:39
AVPacket::data
uint8_t * data
Definition: packet.h:355
ff_id3v1_read
void ff_id3v1_read(AVFormatContext *s)
Read an ID3v1 tag.
Definition: id3v1.c:279
WV_MCINIT
@ WV_MCINIT
Definition: wvdec.c:41
WV_MONO
@ WV_MONO
Definition: wvdec.c:32
AV_DICT_IGNORE_SUFFIX
#define AV_DICT_IGNORE_SUFFIX
Return first entry in a dictionary whose first part corresponds to the search key,...
Definition: dict.h:70
WV_HYBRID
@ WV_HYBRID
Definition: wvdec.c:33
AVPacket::duration
int64_t duration
Duration of this packet in AVStream->time_base units, 0 if unknown.
Definition: packet.h:373
AVProbeData::buf_size
int buf_size
Size of buf except extra allocated bytes.
Definition: avformat.h:444
WvHeader
Definition: wv.h:34
id3v1.h
wv_probe
static int wv_probe(const AVProbeData *p)
Definition: wvdec.c:63
ff_ape_parse_tag
int64_t ff_ape_parse_tag(AVFormatContext *s)
Read and parse an APE tag.
Definition: apetag.c:118
AVPROBE_SCORE_MAX
#define AVPROBE_SCORE_MAX
maximum score
Definition: avformat.h:453
WVContext::multichannel
int multichannel
Definition: wvdec.c:56
AVCodecParameters::channels
int channels
Audio only.
Definition: codec_par.h:166
U
#define U(x)
Definition: vp56_arith.h:37
WV_DSD
@ WV_DSD
Definition: wvdec.c:43
avio_tell
static av_always_inline int64_t avio_tell(AVIOContext *s)
ftell() equivalent for AVIOContext.
Definition: avio.h:557
WvHeader::block_idx
uint32_t block_idx
Definition: wv.h:38
AVFMT_GENERIC_INDEX
#define AVFMT_GENERIC_INDEX
Use generic index building code.
Definition: avformat.h:463
WvHeader::blocksize
uint32_t blocksize
Definition: wv.h:35
AVStream::duration
int64_t duration
Decoding: duration of the stream, in stream time base.
Definition: avformat.h:914
WV_HSHAPE
@ WV_HSHAPE
Definition: wvdec.c:36
avio_rl16
unsigned int avio_rl16(AVIOContext *s)
Definition: aviobuf.c:731
AV_CH_LAYOUT_STEREO
#define AV_CH_LAYOUT_STEREO
Definition: channel_layout.h:86
AV_LOG_ERROR
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
Definition: log.h:176
AVInputFormat
Definition: avformat.h:636
av_dict_get
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
intreadwrite.h
s
#define s(width, name)
Definition: cbs_vp9.c:257
av_new_packet
int av_new_packet(AVPacket *pkt, int size)
Allocate the payload of a packet and initialize its fields with default values.
Definition: avpacket.c:88
WVContext::pos
int64_t pos
Definition: wvdec.c:58
AVInputFormat::name
const char * name
A comma separated list of short names for the format.
Definition: avformat.h:641
AVProbeData::buf
unsigned char * buf
Buffer must have AVPROBE_PADDING_SIZE of extra allocated bytes filled with zero.
Definition: avformat.h:443
AVMEDIA_TYPE_AUDIO
@ AVMEDIA_TYPE_AUDIO
Definition: avutil.h:202
ctx
AVFormatContext * ctx
Definition: movenc.c:48
AV_RL16
#define AV_RL16
Definition: intreadwrite.h:42
WV_FLAG_FINAL_BLOCK
#define WV_FLAG_FINAL_BLOCK
Definition: wv.h:29
WVContext::apetag_start
int64_t apetag_start
Definition: wvdec.c:60
AVFormatContext
Format I/O context.
Definition: avformat.h:1335
internal.h
AVStream::codecpar
AVCodecParameters * codecpar
Codec parameters associated with this stream.
Definition: avformat.h:1012
read_header
static int read_header(FFV1Context *f)
Definition: ffv1dec.c:527
NULL
#define NULL
Definition: coverity.c:32
AVERROR_PATCHWELCOME
#define AVERROR_PATCHWELCOME
Not yet implemented in FFmpeg, patches welcome.
Definition: error.h:62
read_probe
static int read_probe(const AVProbeData *pd)
Definition: jvdec.c:55
WV_FLAGS
WV_FLAGS
Definition: wvdec.c:31
WV_HBR
@ WV_HBR
Definition: wvdec.c:39
WV_HEADER_SIZE
#define WV_HEADER_SIZE
Definition: wavpack.h:30
WV_JOINT
@ WV_JOINT
Definition: wvdec.c:34
AVProbeData
This structure contains the data a format has to probe a file.
Definition: avformat.h:441
AVCodecParameters::sample_rate
int sample_rate
Audio only.
Definition: codec_par.h:170
ff_wv_parse_header
int ff_wv_parse_header(WvHeader *wv, const uint8_t *data)
Parse a WavPack block header.
Definition: wv.c:29
WvHeader::initial
int initial
Definition: wv.h:43
WVContext::header
WvHeader header
Definition: wvdec.c:53
avio_rl32
unsigned int avio_rl32(AVIOContext *s)
Definition: aviobuf.c:747
AVIOContext
Bytestream IO Context.
Definition: avio.h:161
WvHeader::flags
uint32_t flags
Definition: wv.h:40
AVPacket::size
int size
Definition: packet.h:356
NULL_IF_CONFIG_SMALL
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification.
Definition: internal.h:186
id
enum AVCodecID id
Definition: extract_extradata_bsf.c:332
AVIOContext::seekable
int seekable
A combination of AVIO_SEEKABLE_ flags or 0 when the stream is not seekable.
Definition: avio.h:260
avpriv_set_pts_info
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:4938
size
int size
Definition: twinvq_data.h:11134
avpriv_report_missing_feature
void avpriv_report_missing_feature(void *avc, const char *msg,...) av_printf_format(2
Log a generic warning message about a missing feature.
AV_WL16
#define AV_WL16(p, v)
Definition: intreadwrite.h:412
avio_r8
int avio_r8(AVIOContext *s)
Definition: aviobuf.c:616
WV_CROSSD
@ WV_CROSSD
Definition: wvdec.c:35
AVPacket::pts
int64_t pts
Presentation timestamp in AVStream->time_base units; the time at which the decompressed packet will b...
Definition: packet.h:348
avio_rl24
unsigned int avio_rl24(AVIOContext *s)
Definition: aviobuf.c:739
uint8_t
uint8_t
Definition: audio_convert.c:194
WVContext::chan
int chan
Definition: wvdec.c:54
WVContext::chmask
uint32_t chmask
Definition: wvdec.c:55
WVContext
Definition: wvdec.c:51
WvHeader::version
uint16_t version
Definition: wv.h:36
ret
ret
Definition: filter_design.txt:187
read_packet
static int read_packet(void *opaque, uint8_t *buf, int buf_size)
Definition: avio_reading.c:42
AVStream
Stream structure.
Definition: avformat.h:865
avio_seek
int64_t avio_seek(AVIOContext *s, int64_t offset, int whence)
fseek() equivalent for AVIOContext.
Definition: aviobuf.c:241
WVContext::block_header
uint8_t block_header[WV_HEADER_SIZE]
Definition: wvdec.c:52
pos
unsigned int pos
Definition: spdifenc.c:410
avformat.h
dict.h
channel_layout.h
WVContext::rate
int rate
Definition: wvdec.c:54
wv.h
pkt
static AVPacket pkt
Definition: demuxing_decoding.c:54
AV_RL32
#define AV_RL32
Definition: intreadwrite.h:146
AVIO_SEEKABLE_NORMAL
#define AVIO_SEEKABLE_NORMAL
Seeking works like for a local file.
Definition: avio.h:40
avio_read
int avio_read(AVIOContext *s, unsigned char *buf, int size)
Read size bytes from AVIOContext into buf.
Definition: aviobuf.c:625
ff_wv_demuxer
AVInputFormat ff_wv_demuxer
Definition: wvdec.c:331
AVPacket::stream_index
int stream_index
Definition: packet.h:357
avio_skip
int64_t avio_skip(AVIOContext *s, int64_t offset)
Skip given number of bytes forward.
Definition: aviobuf.c:329
AVCodecParameters::bits_per_coded_sample
int bits_per_coded_sample
The number of bits per sample in the codedwords.
Definition: codec_par.h:102
AVCodecParameters::codec_id
enum AVCodecID codec_id
Specific type of the encoded data (the codec used).
Definition: codec_par.h:60
AVPacket
This structure stores compressed data.
Definition: packet.h:332
WV_HBAL
@ WV_HBAL
Definition: wvdec.c:40
AVPacket::pos
int64_t pos
byte position in stream, -1 if unknown
Definition: packet.h:375
WVContext::bpp
int bpp
Definition: wvdec.c:54
AVCodecParameters::channel_layout
uint64_t channel_layout
Audio only.
Definition: codec_par.h:162
flags
#define flags(name, subs,...)
Definition: cbs_av1.c:564
WvHeader::final
int final
Definition: wv.h:43
av_log
#define av_log(a,...)
Definition: tableprint_vlc.h:28
AV_CODEC_ID_WAVPACK
@ AV_CODEC_ID_WAVPACK
Definition: codec_id.h:435
AVERROR_INVALIDDATA
#define AVERROR_INVALIDDATA
Invalid data found when processing input.
Definition: error.h:59
AVStream::start_time
int64_t start_time
Decoding: pts of the first frame of the stream in presentation order, in stream time base.
Definition: avformat.h:904
AVFormatContext::priv_data
void * priv_data
Format private data.
Definition: avformat.h:1363
wv_read_block_header
static int wv_read_block_header(AVFormatContext *ctx, AVIOContext *pb)
Definition: wvdec.c:78
WV_INT32
@ WV_INT32
Definition: wvdec.c:38
WVContext::block_parsed
int block_parsed
Definition: wvdec.c:57
ff_alloc_extradata
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:3321
wv_rates
static const int wv_rates[16]
Definition: wvdec.c:46
avio_feof
int avio_feof(AVIOContext *s)
Similar to feof() but also returns nonzero on read errors.
Definition: aviobuf.c:356