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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 };
44 
45 static const int wv_rates[16] = {
46  6000, 8000, 9600, 11025, 12000, 16000, 22050, 24000,
47  32000, 44100, 48000, 64000, 88200, 96000, 192000, -1
48 };
49 
50 typedef struct WVContext {
53  int rate, chan, bpp;
54  uint32_t chmask;
57  int64_t pos;
58 
59  int64_t apetag_start;
60 } WVContext;
61 
62 static int wv_probe(AVProbeData *p)
63 {
64  /* check file header */
65  if (p->buf_size <= 32)
66  return 0;
67  if (AV_RL32(&p->buf[0]) == MKTAG('w', 'v', 'p', 'k') &&
68  AV_RL32(&p->buf[4]) >= 24 &&
69  AV_RL32(&p->buf[4]) <= WV_BLOCK_LIMIT &&
70  AV_RL16(&p->buf[8]) >= 0x402 &&
71  AV_RL16(&p->buf[8]) <= 0x410)
72  return AVPROBE_SCORE_MAX;
73  else
74  return 0;
75 }
76 
78 {
79  WVContext *wc = ctx->priv_data;
80  int ret;
81  int rate, bpp, chan;
82  uint32_t chmask, flags;
83 
84  wc->pos = avio_tell(pb);
85 
86  /* don't return bogus packets with the ape tag data */
87  if (wc->apetag_start && wc->pos >= wc->apetag_start)
88  return AVERROR_EOF;
89 
90  ret = avio_read(pb, wc->block_header, WV_HEADER_SIZE);
91  if (ret != WV_HEADER_SIZE)
92  return (ret < 0) ? ret : AVERROR_EOF;
93 
94  ret = ff_wv_parse_header(&wc->header, wc->block_header);
95  if (ret < 0) {
96  av_log(ctx, AV_LOG_ERROR, "Invalid block header.\n");
97  return ret;
98  }
99 
100  if (wc->header.version < 0x402 || wc->header.version > 0x410) {
101  av_log(ctx, AV_LOG_ERROR, "Unsupported version %03X\n", wc->header.version);
102  return AVERROR_PATCHWELCOME;
103  }
104 
105  /* Blocks with zero samples don't contain actual audio information
106  * and should be ignored */
107  if (!wc->header.samples)
108  return 0;
109  // parse flags
110  flags = wc->header.flags;
111  bpp = ((flags & 3) + 1) << 3;
112  chan = 1 + !(flags & WV_MONO);
113  chmask = flags & WV_MONO ? AV_CH_LAYOUT_MONO : AV_CH_LAYOUT_STEREO;
114  rate = wv_rates[(flags >> 23) & 0xF];
115  wc->multichannel = !(wc->header.initial && wc->header.final);
116  if (wc->multichannel) {
117  chan = wc->chan;
118  chmask = wc->chmask;
119  }
120  if ((rate == -1 || !chan) && !wc->block_parsed) {
121  int64_t block_end = avio_tell(pb) + wc->header.blocksize;
122  if (!pb->seekable) {
123  av_log(ctx, AV_LOG_ERROR,
124  "Cannot determine additional parameters\n");
125  return AVERROR_INVALIDDATA;
126  }
127  while (avio_tell(pb) < block_end && !avio_feof(pb)) {
128  int id, size;
129  id = avio_r8(pb);
130  size = (id & 0x80) ? avio_rl24(pb) : avio_r8(pb);
131  size <<= 1;
132  if (id & 0x40)
133  size--;
134  switch (id & 0x3F) {
135  case 0xD:
136  if (size <= 1) {
137  av_log(ctx, AV_LOG_ERROR,
138  "Insufficient channel information\n");
139  return AVERROR_INVALIDDATA;
140  }
141  chan = avio_r8(pb);
142  switch (size - 2) {
143  case 0:
144  chmask = avio_r8(pb);
145  break;
146  case 1:
147  chmask = avio_rl16(pb);
148  break;
149  case 2:
150  chmask = avio_rl24(pb);
151  break;
152  case 3:
153  chmask = avio_rl32(pb);
154  break;
155  case 5:
156  avio_skip(pb, 1);
157  chan |= (avio_r8(pb) & 0xF) << 8;
158  chmask = avio_rl24(pb);
159  break;
160  default:
161  av_log(ctx, AV_LOG_ERROR,
162  "Invalid channel info size %d\n", size);
163  return AVERROR_INVALIDDATA;
164  }
165  break;
166  case 0x27:
167  rate = avio_rl24(pb);
168  break;
169  default:
170  avio_skip(pb, size);
171  }
172  if (id & 0x40)
173  avio_skip(pb, 1);
174  }
175  if (rate == -1) {
176  av_log(ctx, AV_LOG_ERROR,
177  "Cannot determine custom sampling rate\n");
178  return AVERROR_INVALIDDATA;
179  }
180  avio_seek(pb, block_end - wc->header.blocksize, SEEK_SET);
181  }
182  if (!wc->bpp)
183  wc->bpp = bpp;
184  if (!wc->chan)
185  wc->chan = chan;
186  if (!wc->chmask)
187  wc->chmask = chmask;
188  if (!wc->rate)
189  wc->rate = rate;
190 
191  if (flags && bpp != wc->bpp) {
192  av_log(ctx, AV_LOG_ERROR,
193  "Bits per sample differ, this block: %i, header block: %i\n",
194  bpp, wc->bpp);
195  return AVERROR_INVALIDDATA;
196  }
197  if (flags && !wc->multichannel && chan != wc->chan) {
198  av_log(ctx, AV_LOG_ERROR,
199  "Channels differ, this block: %i, header block: %i\n",
200  chan, wc->chan);
201  return AVERROR_INVALIDDATA;
202  }
203  if (flags && rate != -1 && rate != wc->rate) {
204  av_log(ctx, AV_LOG_ERROR,
205  "Sampling rate differ, this block: %i, header block: %i\n",
206  rate, wc->rate);
207  return AVERROR_INVALIDDATA;
208  }
209  return 0;
210 }
211 
213 {
214  AVIOContext *pb = s->pb;
215  WVContext *wc = s->priv_data;
216  AVStream *st;
217  int ret;
218 
219  wc->block_parsed = 0;
220  for (;;) {
221  if ((ret = wv_read_block_header(s, pb)) < 0)
222  return ret;
223  if (!wc->header.samples)
224  avio_skip(pb, wc->header.blocksize);
225  else
226  break;
227  }
228 
229  /* now we are ready: build format streams */
230  st = avformat_new_stream(s, NULL);
231  if (!st)
232  return AVERROR(ENOMEM);
235  st->codec->channels = wc->chan;
236  st->codec->channel_layout = wc->chmask;
237  st->codec->sample_rate = wc->rate;
238  st->codec->bits_per_coded_sample = wc->bpp;
239  avpriv_set_pts_info(st, 64, 1, wc->rate);
240  st->start_time = 0;
241  if (wc->header.total_samples != 0xFFFFFFFFu)
242  st->duration = wc->header.total_samples;
243 
244  if (s->pb->seekable) {
245  int64_t cur = avio_tell(s->pb);
248  ff_id3v1_read(s);
249  avio_seek(s->pb, cur, SEEK_SET);
250  }
251 
252  return 0;
253 }
254 
256 {
257  WVContext *wc = s->priv_data;
258  int ret;
259  int off;
260  int64_t pos;
261  uint32_t block_samples;
262 
263  if (avio_feof(s->pb))
264  return AVERROR_EOF;
265  if (wc->block_parsed) {
266  if ((ret = wv_read_block_header(s, s->pb)) < 0)
267  return ret;
268  }
269 
270  pos = wc->pos;
271  if (av_new_packet(pkt, wc->header.blocksize + WV_HEADER_SIZE) < 0)
272  return AVERROR(ENOMEM);
273  memcpy(pkt->data, wc->block_header, WV_HEADER_SIZE);
274  ret = avio_read(s->pb, pkt->data + WV_HEADER_SIZE, wc->header.blocksize);
275  if (ret != wc->header.blocksize) {
276  av_free_packet(pkt);
277  return AVERROR(EIO);
278  }
279  while (!(wc->header.flags & WV_FLAG_FINAL_BLOCK)) {
280  if ((ret = wv_read_block_header(s, s->pb)) < 0) {
281  av_free_packet(pkt);
282  return ret;
283  }
284 
285  off = pkt->size;
286  if ((ret = av_grow_packet(pkt, WV_HEADER_SIZE + wc->header.blocksize)) < 0) {
287  av_free_packet(pkt);
288  return ret;
289  }
290  memcpy(pkt->data + off, wc->block_header, WV_HEADER_SIZE);
291 
292  ret = avio_read(s->pb, pkt->data + off + WV_HEADER_SIZE, wc->header.blocksize);
293  if (ret != wc->header.blocksize) {
294  av_free_packet(pkt);
295  return (ret < 0) ? ret : AVERROR_EOF;
296  }
297  }
298  pkt->stream_index = 0;
299  pkt->pos = pos;
300  wc->block_parsed = 1;
301  pkt->pts = wc->header.block_idx;
302  block_samples = wc->header.samples;
303  if (block_samples > INT32_MAX)
305  "Too many samples in block: %"PRIu32"\n", block_samples);
306  else
307  pkt->duration = block_samples;
308 
309  return 0;
310 }
311 
313  .name = "wv",
314  .long_name = NULL_IF_CONFIG_SMALL("WavPack"),
315  .priv_data_size = sizeof(WVContext),
316  .read_probe = wv_probe,
320 };
int64_t pos
Definition: wvdec.c:57
#define NULL
Definition: coverity.c:32
int block_parsed
Definition: wvdec.c:56
const char * s
Definition: avisynth_c.h:631
Bytestream IO Context.
Definition: avio.h:111
#define AVERROR_INVALIDDATA
Invalid data found when processing input.
Definition: error.h:59
uint8_t block_header[WV_HEADER_SIZE]
Definition: wvdec.c:51
void av_free_packet(AVPacket *pkt)
Free a packet.
Definition: avpacket.c:280
uint32_t samples
Definition: wv.h:39
int initial
Definition: wv.h:43
enum AVCodecID id
Definition: mxfenc.c:99
#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:1187
int rate
Definition: wvdec.c:53
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:4006
void ff_id3v1_read(AVFormatContext *s)
Read an ID3v1 tag.
Definition: id3v1.c:235
int size
Definition: avcodec.h:1163
int64_t avio_seek(AVIOContext *s, int64_t offset, int whence)
fseek() equivalent for AVIOContext.
Definition: aviobuf.c:203
#define WV_BLOCK_LIMIT
Definition: wv.h:32
static int wv_read_packet(AVFormatContext *s, AVPacket *pkt)
Definition: wvdec.c:255
int64_t avio_skip(AVIOContext *s, int64_t offset)
Skip given number of bytes forward.
Definition: aviobuf.c:276
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:85
int multichannel
Definition: wvdec.c:55
Format I/O context.
Definition: avformat.h:1272
Public dictionary API.
static int wv_probe(AVProbeData *p)
Definition: wvdec.c:62
uint8_t
uint32_t flags
Definition: wv.h:40
AVStream * avformat_new_stream(AVFormatContext *s, const AVCodec *c)
Add a new stream to a media file.
Definition: utils.c:3672
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:39
uint8_t * data
Definition: avcodec.h:1162
#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:101
static av_always_inline int64_t avio_tell(AVIOContext *s)
ftell() equivalent for AVIOContext.
Definition: avio.h:365
int bits_per_coded_sample
bits per sample/pixel from the demuxer (needed for huffyuv).
Definition: avcodec.h:2720
Definition: wv.h:34
int duration
Duration of this packet in AVStream->time_base units, 0 if unknown.
Definition: avcodec.h:1180
#define av_log(a,...)
int avio_read(AVIOContext *s, unsigned char *buf, int size)
Read size bytes from AVIOContext into buf.
Definition: aviobuf.c:537
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:83
#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:1482
AVInputFormat ff_wv_demuxer
Definition: wvdec.c:312
unsigned int avio_rl32(AVIOContext *s)
Definition: aviobuf.c:658
#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:175
int final
Definition: wv.h:43
int64_t ff_ape_parse_tag(AVFormatContext *s)
Read and parse an APE tag.
Definition: apetag.c:118
uint64_t channel_layout
Audio channel layout.
Definition: avcodec.h:2046
int avio_r8(AVIOContext *s)
Definition: aviobuf.c:528
AVCodecContext * codec
Codec context associated with this stream.
Definition: avformat.h:861
int buf_size
Size of buf except extra allocated bytes.
Definition: avformat.h:451
unsigned char * buf
Buffer must have AVPROBE_PADDING_SIZE of extra allocated bytes filled with zero.
Definition: avformat.h:450
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:160
audio channel layout utility functions
Definition: wvdec.c:39
static int read_probe(AVProbeData *pd)
Definition: jvdec.c:55
ret
Definition: avfilter.c:974
static const int wv_rates[16]
Definition: wvdec.c:45
int ff_wv_parse_header(WvHeader *wv, const uint8_t *data)
Parse a WavPack block header.
Definition: wv.c:29
int bpp
Definition: wvdec.c:53
int64_t apetag_start
Definition: wvdec.c:59
WvHeader header
Definition: wvdec.c:52
Definition: wvdec.c:34
static int read_header(FFV1Context *f)
Definition: ffv1dec.c:620
Stream structure.
Definition: avformat.h:842
#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
enum AVMediaType codec_type
Definition: avcodec.h:1249
enum AVCodecID codec_id
Definition: avcodec.h:1258
int sample_rate
samples per second
Definition: avcodec.h:1985
AVIOContext * pb
I/O context.
Definition: avformat.h:1314
#define AVFMT_GENERIC_INDEX
Use generic index building code.
Definition: avformat.h:473
uint32_t total_samples
Definition: wv.h:37
int chan
Definition: wvdec.c:53
uint32_t chmask
Definition: wvdec.c:54
This structure contains the data a format has to probe a file.
Definition: avformat.h:448
uint32_t block_idx
Definition: wv.h:38
static int flags
Definition: cpu.c:47
int64_t duration
Decoding: duration of the stream, in stream time base.
Definition: avformat.h:901
#define AVPROBE_SCORE_MAX
maximum score
Definition: avformat.h:460
unsigned int avio_rl16(AVIOContext *s)
Definition: aviobuf.c:642
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:894
static int wv_read_header(AVFormatContext *s)
Definition: wvdec.c:212
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
int channels
number of audio channels
Definition: avcodec.h:1986
void * priv_data
Format private data.
Definition: avformat.h:1300
const char * name
A comma separated list of short names for the format.
Definition: avformat.h:628
#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:72
Definition: wvdec.c:42
int avio_feof(AVIOContext *s)
feof() equivalent for AVIOContext.
Definition: aviobuf.c:300
unsigned int avio_rl24(AVIOContext *s)
Definition: aviobuf.c:650
int stream_index
Definition: avcodec.h:1164
static int wv_read_block_header(AVFormatContext *ctx, AVIOContext *pb)
Definition: wvdec.c:77
#define AV_CH_LAYOUT_MONO
#define MKTAG(a, b, c, d)
Definition: common.h:315
uint64_t_TMPL AV_WL64 unsigned int_TMPL AV_RL32
Definition: bytestream.h:85
This structure stores compressed data.
Definition: avcodec.h:1139
#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:1155