FFmpeg
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);
117  chmask = flags & WV_MONO ? AV_CH_LAYOUT_MONO : AV_CH_LAYOUT_STEREO;
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)) {
127  av_log(ctx, AV_LOG_ERROR,
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) {
141  av_log(ctx, AV_LOG_ERROR,
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:
172  av_log(ctx, AV_LOG_ERROR,
173  "Invalid channel info size %d\n", size);
174  return AVERROR_INVALIDDATA;
175  }
176  break;
177  case 0xE:
178  if (size <= 1) {
179  av_log(ctx, AV_LOG_ERROR,
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) {
197  av_log(ctx, AV_LOG_ERROR,
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) {
213  av_log(ctx, AV_LOG_ERROR,
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) {
219  av_log(ctx, AV_LOG_ERROR,
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) {
225  av_log(ctx, AV_LOG_ERROR,
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);
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 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
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:200
int64_t pos
byte position in stream, -1 if unknown
Definition: packet.h:383
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:4871
enum AVCodecID codec_id
Specific type of the encoded data (the codec used).
Definition: codec_par.h:60
void ff_id3v1_read(AVFormatContext *s)
Read an ID3v1 tag.
Definition: id3v1.c:279
int size
Definition: packet.h:364
int64_t avio_seek(AVIOContext *s, int64_t offset, int whence)
fseek() equivalent for AVIOContext.
Definition: aviobuf.c:253
#define WV_BLOCK_LIMIT
Definition: wv.h:32
static int wv_read_packet(AVFormatContext *s, AVPacket *pkt)
Definition: wvdec.c:279
int64_t avio_skip(AVIOContext *s, int64_t offset)
Skip given number of bytes forward.
Definition: aviobuf.c:341
static AVPacket pkt
#define AV_CH_LAYOUT_STEREO
uint64_t_TMPL AV_WL64 unsigned int_TMPL AV_WL32 unsigned int_TMPL AV_WL24 unsigned int_TMPL AV_RL16
Definition: bytestream.h:91
int multichannel
Definition: wvdec.c:56
Format I/O context.
Definition: avformat.h:1239
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: packet.h:381
AVStream * avformat_new_stream(AVFormatContext *s, const AVCodec *c)
Add a new stream to a media file.
Definition: utils.c:4453
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: packet.h:363
#define AVERROR_EOF
End of file.
Definition: error.h:55
#define WV_HEADER_SIZE
Definition: wavpack.h:30
ptrdiff_t size
Definition: opengl_enc.c:100
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: codec_par.h:162
#define av_log(a,...)
int avio_read(AVIOContext *s, unsigned char *buf, int size)
Read size bytes from AVIOContext into buf.
Definition: aviobuf.c:637
WV_FLAGS
Definition: wvdec.c:31
#define U(x)
Definition: vp56_arith.h:37
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
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
Definition: log.h:194
AVDictionary * metadata
Metadata that applies to the whole file.
Definition: avformat.h:1479
AVInputFormat ff_wv_demuxer
Definition: wvdec.c:332
unsigned int avio_rl32(AVIOContext *s)
Definition: aviobuf.c:754
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification. ...
Definition: internal.h:153
enum AVMediaType codec_type
General type of the encoded data.
Definition: codec_par.h:56
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:628
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
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
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:3260
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
WvHeader header
Definition: wvdec.c:53
Definition: wvdec.c:34
static int read_header(FFV1Context *f)
Definition: ffv1dec.c:527
Stream structure.
Definition: avformat.h:880
#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:1281
#define AVFMT_GENERIC_INDEX
Use generic index building code.
Definition: avformat.h:463
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:441
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:560
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:929
int sample_rate
Audio only.
Definition: codec_par.h:170
#define AVPROBE_SCORE_MAX
maximum score
Definition: avformat.h:453
unsigned int avio_rl16(AVIOContext *s)
Definition: aviobuf.c:738
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:919
static int wv_read_header(AVFormatContext *s)
Definition: wvdec.c:233
#define AV_WL16(p, v)
Definition: intreadwrite.h:412
int av_grow_packet(AVPacket *pkt, int grow_by)
Increase packet size, correctly zeroing padding.
Definition: avpacket.c:111
Definition: wvdec.c:38
Definition: wvdec.c:37
void * priv_data
Format private data.
Definition: avformat.h:1267
int bits_per_coded_sample
The number of bits per sample in the codedwords.
Definition: codec_par.h:102
uint8_t * extradata
Extra binary data needed for initializing the decoder, codec-dependent.
Definition: codec_par.h:74
int channels
Audio only.
Definition: codec_par.h:166
const char * name
A comma separated list of short names for the format.
Definition: avformat.h:652
#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:1045
Definition: wvdec.c:42
int avio_feof(AVIOContext *s)
Similar to feof() but also returns nonzero on read errors.
Definition: aviobuf.c:368
unsigned int avio_rl24(AVIOContext *s)
Definition: aviobuf.c:746
int stream_index
Definition: packet.h:365
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
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:405
enum AVCodecID id
uint64_t_TMPL AV_WL64 unsigned int_TMPL AV_RL32
Definition: bytestream.h:91
This structure stores compressed data.
Definition: packet.h:340
#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: packet.h:356