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, 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 
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.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);
116  chmask = flags & WV_MONO ? AV_CH_LAYOUT_MONO : AV_CH_LAYOUT_STEREO;
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)) {
126  av_log(ctx, AV_LOG_ERROR,
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) {
140  av_log(ctx, AV_LOG_ERROR,
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:
171  av_log(ctx, AV_LOG_ERROR,
172  "Invalid channel info size %d\n", size);
173  return AVERROR_INVALIDDATA;
174  }
175  break;
176  case 0xE:
177  if (size <= 1) {
178  av_log(ctx, AV_LOG_ERROR,
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) {
196  av_log(ctx, AV_LOG_ERROR,
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) {
212  av_log(ctx, AV_LOG_ERROR,
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) {
218  av_log(ctx, AV_LOG_ERROR,
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) {
224  av_log(ctx, AV_LOG_ERROR,
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);
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);
297  ret = avio_read(s->pb, pkt->data + WV_HEADER_SIZE, wc->header.blocksize);
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 };
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:4869
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:278
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:87
int multichannel
Definition: wvdec.c:56
Format I/O context.
Definition: avformat.h:1351
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:4450
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:1591
AVInputFormat ff_wv_demuxer
Definition: wvdec.c:331
unsigned int avio_rl32(AVIOContext *s)
Definition: aviobuf.c:759
#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:3259
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:876
#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:1393
#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:925
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:743
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:915
static int wv_read_header(AVFormatContext *s)
Definition: wvdec.c:232
#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:1379
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:650
#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:1023
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:751
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:406
enum AVCodecID id
uint64_t_TMPL AV_WL64 unsigned int_TMPL AV_RL32
Definition: bytestream.h:87
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