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 
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
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:1502
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:4929
enum AVCodecID codec_id
Specific type of the encoded data (the codec used).
Definition: avcodec.h:3970
void ff_id3v1_read(AVFormatContext *s)
Read an ID3v1 tag.
Definition: id3v1.c:235
int size
Definition: avcodec.h:1483
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
int64_t avio_skip(AVIOContext *s, int64_t offset)
Skip given number of bytes forward.
Definition: aviobuf.c:334
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: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:1500
AVStream * avformat_new_stream(AVFormatContext *s, const AVCodec *c)
Add a new stream to a media file.
Definition: utils.c:4502
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:1482
#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: avcodec.h:4072
#define av_log(a,...)
int avio_read(AVIOContext *s, unsigned char *buf, int size)
Read size bytes from AVIOContext into buf.
Definition: aviobuf.c:650
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:772
#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:3966
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:641
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
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:4080
#define AVPROBE_SCORE_MAX
maximum score
Definition: avformat.h:458
unsigned int avio_rl16(AVIOContext *s)
Definition: aviobuf.c:756
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:4012
int channels
Audio only.
Definition: avcodec.h:4076
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:361
unsigned int avio_rl24(AVIOContext *s)
Definition: aviobuf.c:764
int stream_index
Definition: avcodec.h:1484
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:366
enum AVCodecID id
uint64_t_TMPL AV_WL64 unsigned int_TMPL AV_RL32
Definition: bytestream.h:87
This structure stores compressed data.
Definition: avcodec.h:1459
#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:1475