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vqf.c
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1 /*
2  * VQF demuxer
3  * Copyright (c) 2009 Vitor Sessak
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 
22 #include "avformat.h"
23 #include "internal.h"
24 #include "libavutil/intreadwrite.h"
25 #include "libavutil/dict.h"
26 #include "libavutil/mathematics.h"
27 #include "riff.h"
28 
29 typedef struct VqfContext {
33 } VqfContext;
34 
35 static int vqf_probe(AVProbeData *probe_packet)
36 {
37  if (AV_RL32(probe_packet->buf) != MKTAG('T','W','I','N'))
38  return 0;
39 
40  if (!memcmp(probe_packet->buf + 4, "97012000", 8))
41  return AVPROBE_SCORE_MAX;
42 
43  if (!memcmp(probe_packet->buf + 4, "00052200", 8))
44  return AVPROBE_SCORE_MAX;
45 
46  if (AV_RL32(probe_packet->buf + 12) > (1<<27))
47  return AVPROBE_SCORE_EXTENSION/2;
48 
50 }
51 
52 static void add_metadata(AVFormatContext *s, uint32_t tag,
53  unsigned int tag_len, unsigned int remaining)
54 {
55  int len = FFMIN(tag_len, remaining);
56  char *buf, key[5] = {0};
57 
58  if (len == UINT_MAX)
59  return;
60 
61  buf = av_malloc(len+1);
62  if (!buf)
63  return;
64  avio_read(s->pb, buf, len);
65  buf[len] = 0;
66  AV_WL32(key, tag);
68 }
69 
71  { "(c) ", "copyright" },
72  { "ARNG", "arranger" },
73  { "AUTH", "author" },
74  { "BAND", "band" },
75  { "CDCT", "conductor" },
76  { "COMT", "comment" },
77  { "FILE", "filename" },
78  { "GENR", "genre" },
79  { "LABL", "publisher" },
80  { "MUSC", "composer" },
81  { "NAME", "title" },
82  { "NOTE", "note" },
83  { "PROD", "producer" },
84  { "PRSN", "personnel" },
85  { "REMX", "remixer" },
86  { "SING", "singer" },
87  { "TRCK", "track" },
88  { "WORD", "words" },
89  { 0 },
90 };
91 
93 {
94  VqfContext *c = s->priv_data;
96  int chunk_tag;
97  int rate_flag = -1;
98  int header_size;
99  int read_bitrate = 0;
100  int size;
101  uint8_t comm_chunk[12];
102 
103  if (!st)
104  return AVERROR(ENOMEM);
105 
106  avio_skip(s->pb, 12);
107 
108  header_size = avio_rb32(s->pb);
109 
112  st->start_time = 0;
113 
114  do {
115  int len;
116  chunk_tag = avio_rl32(s->pb);
117 
118  if (chunk_tag == MKTAG('D','A','T','A'))
119  break;
120 
121  len = avio_rb32(s->pb);
122 
123  if ((unsigned) len > INT_MAX/2) {
124  av_log(s, AV_LOG_ERROR, "Malformed header\n");
125  return -1;
126  }
127 
128  header_size -= 8;
129 
130  switch(chunk_tag){
131  case MKTAG('C','O','M','M'):
132  avio_read(s->pb, comm_chunk, 12);
133  st->codecpar->channels = AV_RB32(comm_chunk ) + 1;
134  read_bitrate = AV_RB32(comm_chunk + 4);
135  rate_flag = AV_RB32(comm_chunk + 8);
136  avio_skip(s->pb, len-12);
137 
138  if (st->codecpar->channels <= 0) {
139  av_log(s, AV_LOG_ERROR, "Invalid number of channels\n");
140  return AVERROR_INVALIDDATA;
141  }
142 
143  st->codecpar->bit_rate = read_bitrate * 1000;
144  break;
145  case MKTAG('D','S','I','Z'): // size of compressed data
146  {
147  av_dict_set_int(&s->metadata, "size", avio_rb32(s->pb), 0);
148  }
149  break;
150  case MKTAG('Y','E','A','R'): // recording date
151  case MKTAG('E','N','C','D'): // compression date
152  case MKTAG('E','X','T','R'): // reserved
153  case MKTAG('_','Y','M','H'): // reserved
154  case MKTAG('_','N','T','T'): // reserved
155  case MKTAG('_','I','D','3'): // reserved for ID3 tags
156  avio_skip(s->pb, FFMIN(len, header_size));
157  break;
158  default:
159  add_metadata(s, chunk_tag, len, header_size);
160  break;
161  }
162 
163  header_size -= len;
164 
165  } while (header_size >= 0 && !avio_feof(s->pb));
166 
167  switch (rate_flag) {
168  case -1:
169  av_log(s, AV_LOG_ERROR, "COMM tag not found!\n");
170  return -1;
171  case 44:
172  st->codecpar->sample_rate = 44100;
173  break;
174  case 22:
175  st->codecpar->sample_rate = 22050;
176  break;
177  case 11:
178  st->codecpar->sample_rate = 11025;
179  break;
180  default:
181  if (rate_flag < 8 || rate_flag > 44) {
182  av_log(s, AV_LOG_ERROR, "Invalid rate flag %d\n", rate_flag);
183  return AVERROR_INVALIDDATA;
184  }
185  st->codecpar->sample_rate = rate_flag*1000;
186  break;
187  }
188 
189  if (read_bitrate / st->codecpar->channels < 8 ||
190  read_bitrate / st->codecpar->channels > 48) {
191  av_log(s, AV_LOG_ERROR, "Invalid bitrate per channel %d\n",
192  read_bitrate / st->codecpar->channels);
193  return AVERROR_INVALIDDATA;
194  }
195 
196  switch (((st->codecpar->sample_rate/1000) << 8) +
197  read_bitrate/st->codecpar->channels) {
198  case (11<<8) + 8 :
199  case (8 <<8) + 8 :
200  case (11<<8) + 10:
201  case (22<<8) + 32:
202  size = 512;
203  break;
204  case (16<<8) + 16:
205  case (22<<8) + 20:
206  case (22<<8) + 24:
207  size = 1024;
208  break;
209  case (44<<8) + 40:
210  case (44<<8) + 48:
211  size = 2048;
212  break;
213  default:
214  av_log(s, AV_LOG_ERROR, "Mode not supported: %d Hz, %"PRId64" kb/s.\n",
215  st->codecpar->sample_rate, (int64_t)st->codecpar->bit_rate);
216  return -1;
217  }
218  c->frame_bit_len = st->codecpar->bit_rate*size/st->codecpar->sample_rate;
219  avpriv_set_pts_info(st, 64, size, st->codecpar->sample_rate);
220 
221  /* put first 12 bytes of COMM chunk in extradata */
222  if (ff_alloc_extradata(st->codecpar, 12))
223  return AVERROR(ENOMEM);
224  memcpy(st->codecpar->extradata, comm_chunk, 12);
225 
226  ff_metadata_conv_ctx(s, NULL, vqf_metadata_conv);
227 
228  return 0;
229 }
230 
232 {
233  VqfContext *c = s->priv_data;
234  int ret;
235  int size = (c->frame_bit_len - c->remaining_bits + 7)>>3;
236 
237  if (av_new_packet(pkt, size+2) < 0)
238  return AVERROR(EIO);
239 
240  pkt->pos = avio_tell(s->pb);
241  pkt->stream_index = 0;
242  pkt->duration = 1;
243 
244  pkt->data[0] = 8 - c->remaining_bits; // Number of bits to skip
245  pkt->data[1] = c->last_frame_bits;
246  ret = avio_read(s->pb, pkt->data+2, size);
247 
248  if (ret != size) {
249  av_packet_unref(pkt);
250  return AVERROR(EIO);
251  }
252 
253  c->last_frame_bits = pkt->data[size+1];
254  c->remaining_bits = (size << 3) - c->frame_bit_len + c->remaining_bits;
255 
256  return size+2;
257 }
258 
260  int stream_index, int64_t timestamp, int flags)
261 {
262  VqfContext *c = s->priv_data;
263  AVStream *st;
264  int64_t ret;
265  int64_t pos;
266 
267  st = s->streams[stream_index];
268  pos = av_rescale_rnd(timestamp * st->codecpar->bit_rate,
269  st->time_base.num,
270  st->time_base.den * (int64_t)c->frame_bit_len,
271  (flags & AVSEEK_FLAG_BACKWARD) ?
273  pos *= c->frame_bit_len;
274 
275  st->cur_dts = av_rescale(pos, st->time_base.den,
276  st->codecpar->bit_rate * (int64_t)st->time_base.num);
277 
278  if ((ret = avio_seek(s->pb, ((pos-7) >> 3) + s->internal->data_offset, SEEK_SET)) < 0)
279  return ret;
280 
281  c->remaining_bits = -7 - ((pos-7)&7);
282  return 0;
283 }
284 
286  .name = "vqf",
287  .long_name = NULL_IF_CONFIG_SMALL("Nippon Telegraph and Telephone Corporation (NTT) TwinVQ"),
288  .priv_data_size = sizeof(VqfContext),
293  .extensions = "vqf,vql,vqe",
294 };
#define AVSEEK_FLAG_BACKWARD
Definition: avformat.h:2366
static int vqf_read_seek(AVFormatContext *s, int stream_index, int64_t timestamp, int flags)
Definition: vqf.c:259
#define NULL
Definition: coverity.c:32
const char * s
Definition: avisynth_c.h:631
#define AVERROR_INVALIDDATA
Invalid data found when processing input.
Definition: error.h:59
void ff_metadata_conv_ctx(AVFormatContext *ctx, const AVMetadataConv *d_conv, const AVMetadataConv *s_conv)
Definition: metadata.c:59
int64_t av_rescale_rnd(int64_t a, int64_t b, int64_t c, enum AVRounding rnd)
Rescale a 64-bit integer with specified rounding.
Definition: mathematics.c:58
int64_t pos
byte position in stream, -1 if unknown
Definition: avcodec.h:1608
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:4493
int64_t data_offset
offset of the first packet
Definition: internal.h:82
static int read_seek(AVFormatContext *ctx, int stream_index, int64_t timestamp, int flags)
Definition: libcdio.c:153
enum AVCodecID codec_id
Specific type of the encoded data (the codec used).
Definition: avcodec.h:3939
int num
numerator
Definition: rational.h:44
int64_t avio_seek(AVIOContext *s, int64_t offset, int whence)
fseek() equivalent for AVIOContext.
Definition: aviobuf.c:230
AVFormatInternal * internal
An opaque field for libavformat internal usage.
Definition: avformat.h:1752
int remaining_bits
Definition: vqf.c:32
int64_t avio_skip(AVIOContext *s, int64_t offset)
Skip given number of bytes forward.
Definition: aviobuf.c:304
Definition: vqf.c:29
static AVPacket pkt
static int vqf_probe(AVProbeData *probe_packet)
Definition: vqf.c:35
Format I/O context.
Definition: avformat.h:1325
int64_t cur_dts
Definition: avformat.h:1048
Public dictionary API.
int frame_bit_len
Definition: vqf.c:30
uint8_t
Round toward +infinity.
Definition: mathematics.h:74
#define av_malloc(s)
unsigned int avio_rb32(AVIOContext *s)
Definition: aviobuf.c:751
int64_t duration
Duration of this packet in AVStream->time_base units, 0 if unknown.
Definition: avcodec.h:1606
AVStream * avformat_new_stream(AVFormatContext *s, const AVCodec *c)
Add a new stream to a media file.
Definition: utils.c:4131
uint64_t_TMPL AV_WL64 unsigned int_TMPL AV_WL32 unsigned int_TMPL AV_WL24 unsigned int_TMPL AV_WL16 uint64_t_TMPL AV_WB64 unsigned int_TMPL AV_RB32
Definition: bytestream.h:87
AVStream ** streams
A list of all streams in the file.
Definition: avformat.h:1393
uint8_t * data
Definition: avcodec.h:1588
uint32_t tag
Definition: movenc.c:1376
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:511
#define av_log(a,...)
int avio_read(AVIOContext *s, unsigned char *buf, int size)
Read size bytes from AVIOContext into buf.
Definition: aviobuf.c:598
int64_t bit_rate
The average bitrate of the encoded data (in bits per second).
Definition: avcodec.h:3968
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:1539
unsigned int avio_rl32(AVIOContext *s)
Definition: aviobuf.c:720
#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:176
enum AVMediaType codec_type
General type of the encoded data.
Definition: avcodec.h:3935
unsigned char * buf
Buffer must have AVPROBE_PADDING_SIZE of extra allocated bytes filled with zero.
Definition: avformat.h:461
AVInputFormat ff_vqf_demuxer
Definition: vqf.c:285
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:3116
int64_t av_rescale(int64_t a, int64_t b, int64_t c)
Rescale a 64-bit integer with rounding to nearest.
Definition: mathematics.c:129
#define FFMIN(a, b)
Definition: common.h:96
#define AV_DICT_DONT_STRDUP_VAL
Take ownership of a value that's been allocated with av_malloc() or another memory allocation functio...
Definition: dict.h:76
static int read_probe(AVProbeData *pd)
Definition: jvdec.c:55
uint8_t last_frame_bits
Definition: vqf.c:31
internal header for RIFF based (de)muxers do NOT include this in end user applications ...
static int vqf_read_header(AVFormatContext *s)
Definition: vqf.c:92
static const AVMetadataConv vqf_metadata_conv[]
Definition: vqf.c:70
static int read_header(FFV1Context *f)
Definition: ffv1dec.c:638
Stream structure.
Definition: avformat.h:876
static int read_packet(void *opaque, uint8_t *buf, int buf_size)
Definition: avio_reading.c:42
AVIOContext * pb
I/O context.
Definition: avformat.h:1367
void av_packet_unref(AVPacket *pkt)
Wipe the packet.
Definition: avpacket.c:563
static int vqf_read_packet(AVFormatContext *s, AVPacket *pkt)
Definition: vqf.c:231
void * buf
Definition: avisynth_c.h:553
int av_dict_set(AVDictionary **pm, const char *key, const char *value, int flags)
Set the given entry in *pm, overwriting an existing entry.
Definition: dict.c:69
#define AVPROBE_SCORE_EXTENSION
score for file extension
Definition: avformat.h:469
This structure contains the data a format has to probe a file.
Definition: avformat.h:459
Round toward -infinity.
Definition: mathematics.h:73
static int flags
Definition: cpu.c:47
int sample_rate
Audio only.
Definition: avcodec.h:4049
#define AVPROBE_SCORE_MAX
maximum score
Definition: avformat.h:471
Main libavformat public API header.
int64_t start_time
Decoding: pts of the first frame of the stream in presentation order, in stream time base...
Definition: avformat.h:923
static double c[64]
int av_dict_set_int(AVDictionary **pm, const char *key, int64_t value, int flags)
Convenience wrapper for av_dict_set that converts the value to a string and stores it...
Definition: dict.c:146
int den
denominator
Definition: rational.h:45
int len
void * priv_data
Format private data.
Definition: avformat.h:1353
uint8_t * extradata
Extra binary data needed for initializing the decoder, codec-dependent.
Definition: avcodec.h:3953
int channels
Audio only.
Definition: avcodec.h:4045
const char * name
A comma separated list of short names for the format.
Definition: avformat.h:660
AVCodecParameters * codecpar
Definition: avformat.h:1228
int avio_feof(AVIOContext *s)
feof() equivalent for AVIOContext.
Definition: aviobuf.c:328
int stream_index
Definition: avcodec.h:1590
AVRational time_base
This is the fundamental unit of time (in seconds) in terms of which frame timestamps are represented...
Definition: avformat.h:913
#define MKTAG(a, b, c, d)
Definition: common.h:342
uint64_t_TMPL AV_WL64 unsigned int_TMPL AV_RL32
Definition: bytestream.h:87
This structure stores compressed data.
Definition: avcodec.h:1565
static void add_metadata(AVFormatContext *s, uint32_t tag, unsigned int tag_len, unsigned int remaining)
Definition: vqf.c:52
#define AV_WL32(p, v)
Definition: intreadwrite.h:426