FFmpeg  4.4
mmf.c
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1 /*
2  * Yamaha SMAF format
3  * Copyright (c) 2005 Vidar Madsen
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 "avformat.h"
24 #include "avio_internal.h"
25 #include "internal.h"
26 #include "pcm.h"
27 #include "rawenc.h"
28 #include "riff.h"
29 
30 typedef struct MMFContext {
31  int64_t atrpos, atsqpos, awapos;
32  int64_t data_end;
33  int stereo;
34 } MMFContext;
35 
36 static const int mmf_rates[] = { 4000, 8000, 11025, 22050, 44100 };
37 
38 static int mmf_rate(int code)
39 {
40  if ((code < 0) || (code > 4))
41  return -1;
42  return mmf_rates[code];
43 }
44 
45 #if CONFIG_MMF_MUXER
46 static int mmf_rate_code(int rate)
47 {
48  int i;
49  for (i = 0; i < 5; i++)
50  if (mmf_rates[i] == rate)
51  return i;
52  return -1;
53 }
54 
55 /* Copy of end_tag() from avienc.c, but for big-endian chunk size */
56 static void end_tag_be(AVIOContext *pb, int64_t start)
57 {
58  int64_t pos;
59 
60  pos = avio_tell(pb);
61  avio_seek(pb, start - 4, SEEK_SET);
62  avio_wb32(pb, (uint32_t)(pos - start));
63  avio_seek(pb, pos, SEEK_SET);
64 }
65 
66 static int mmf_write_header(AVFormatContext *s)
67 {
68  MMFContext *mmf = s->priv_data;
69  AVIOContext *pb = s->pb;
70  int64_t pos;
71  int rate;
72  const char *version = s->flags & AVFMT_FLAG_BITEXACT ?
73  "VN:Lavf," :
74  "VN:"LIBAVFORMAT_IDENT",";
75 
76  rate = mmf_rate_code(s->streams[0]->codecpar->sample_rate);
77  if (rate < 0) {
78  av_log(s, AV_LOG_ERROR, "Unsupported sample rate %d, supported are 4000, 8000, 11025, 22050 and 44100\n",
79  s->streams[0]->codecpar->sample_rate);
80  return AVERROR(EINVAL);
81  }
82 
83  mmf->stereo = s->streams[0]->codecpar->channels > 1;
84  if (mmf->stereo &&
85  s->strict_std_compliance > FF_COMPLIANCE_EXPERIMENTAL) {
86  av_log(s, AV_LOG_ERROR, "Yamaha SMAF stereo is experimental, "
87  "add '-strict %d' if you want to use it.\n",
89  return AVERROR(EINVAL);
90  }
91 
92  ffio_wfourcc(pb, "MMMD");
93  avio_wb32(pb, 0);
94  pos = ff_start_tag(pb, "CNTI");
95  avio_w8(pb, 0); /* class */
96  avio_w8(pb, 1); /* type */
97  avio_w8(pb, 1); /* code type */
98  avio_w8(pb, 0); /* status */
99  avio_w8(pb, 0); /* counts */
100  end_tag_be(pb, pos);
101 
102  pos = ff_start_tag(pb, "OPDA");
103  avio_write(pb, version, strlen(version)); /* metadata ("ST:songtitle,VN:version,...") */
104  end_tag_be(pb, pos);
105 
106  avio_write(pb, "ATR\x00", 4);
107  avio_wb32(pb, 0);
108  mmf->atrpos = avio_tell(pb);
109  avio_w8(pb, 0); /* format type */
110  avio_w8(pb, 0); /* sequence type */
111  avio_w8(pb, (mmf->stereo << 7) | (1 << 4) | rate); /* (channel << 7) | (format << 4) | rate */
112  avio_w8(pb, 0); /* wave base bit */
113  avio_w8(pb, 2); /* time base d */
114  avio_w8(pb, 2); /* time base g */
115 
116  ffio_wfourcc(pb, "Atsq");
117  avio_wb32(pb, 16);
118  mmf->atsqpos = avio_tell(pb);
119  /* Will be filled on close */
120  avio_write(pb, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00", 16);
121 
122  mmf->awapos = ff_start_tag(pb, "Awa\x01");
123 
124  avpriv_set_pts_info(s->streams[0], 64, 1, s->streams[0]->codecpar->sample_rate);
125 
126  return 0;
127 }
128 
129 /* Write a variable-length symbol */
130 static void put_varlength(AVIOContext *pb, int val)
131 {
132  if (val < 128)
133  avio_w8(pb, val);
134  else {
135  val -= 128;
136  avio_w8(pb, 0x80 | val >> 7);
137  avio_w8(pb, 0x7f & val);
138  }
139 }
140 
141 static int mmf_write_trailer(AVFormatContext *s)
142 {
143  AVIOContext *pb = s->pb;
144  MMFContext *mmf = s->priv_data;
145  int64_t pos, size;
146  int gatetime;
147 
148  if (s->pb->seekable & AVIO_SEEKABLE_NORMAL) {
149  /* Fill in length fields */
150  end_tag_be(pb, mmf->awapos);
151  end_tag_be(pb, mmf->atrpos);
152  end_tag_be(pb, 8);
153 
154  pos = avio_tell(pb);
155  size = pos - mmf->awapos;
156 
157  /* Fill Atsq chunk */
158  avio_seek(pb, mmf->atsqpos, SEEK_SET);
159 
160  /* "play wav" */
161  avio_w8(pb, 0); /* start time */
162  avio_w8(pb, (mmf->stereo << 6) | 1); /* (channel << 6) | wavenum */
163  gatetime = size * 500 / s->streams[0]->codecpar->sample_rate;
164  put_varlength(pb, gatetime); /* duration */
165 
166  /* "nop" */
167  put_varlength(pb, gatetime); /* start time */
168  avio_write(pb, "\xff\x00", 2); /* nop */
169 
170  /* "end of sequence" */
171  avio_write(pb, "\x00\x00\x00\x00", 4);
172 
173  avio_seek(pb, pos, SEEK_SET);
174  }
175  return 0;
176 }
177 #endif /* CONFIG_MMF_MUXER */
178 
179 static int mmf_probe(const AVProbeData *p)
180 {
181  /* check file header */
182  if (p->buf[0] == 'M' && p->buf[1] == 'M' &&
183  p->buf[2] == 'M' && p->buf[3] == 'D' &&
184  p->buf[8] == 'C' && p->buf[9] == 'N' &&
185  p->buf[10] == 'T' && p->buf[11] == 'I')
186  return AVPROBE_SCORE_MAX;
187  else
188  return 0;
189 }
190 
191 /* mmf input */
193 {
194  MMFContext *mmf = s->priv_data;
195  unsigned int tag;
196  AVIOContext *pb = s->pb;
197  AVStream *st;
198  int64_t size;
199  int rate, params;
200 
201  tag = avio_rl32(pb);
202  if (tag != MKTAG('M', 'M', 'M', 'D'))
203  return AVERROR_INVALIDDATA;
204  avio_skip(pb, 4); /* file_size */
205 
206  /* Skip some unused chunks that may or may not be present */
207  for (;; avio_skip(pb, size)) {
208  tag = avio_rl32(pb);
209  size = avio_rb32(pb);
210  if (tag == MKTAG('C', 'N', 'T', 'I'))
211  continue;
212  if (tag == MKTAG('O', 'P', 'D', 'A'))
213  continue;
214  break;
215  }
216 
217  /* Tag = "ATRx", where "x" = track number */
218  if ((tag & 0xffffff) == MKTAG('M', 'T', 'R', 0)) {
219  av_log(s, AV_LOG_ERROR, "MIDI like format found, unsupported\n");
220  return AVERROR_PATCHWELCOME;
221  }
222  if ((tag & 0xffffff) != MKTAG('A', 'T', 'R', 0)) {
223  av_log(s, AV_LOG_ERROR, "Unsupported SMAF chunk %08x\n", tag);
224  return AVERROR_PATCHWELCOME;
225  }
226 
227  avio_r8(pb); /* format type */
228  avio_r8(pb); /* sequence type */
229  params = avio_r8(pb); /* (channel << 7) | (format << 4) | rate */
230  rate = mmf_rate(params & 0x0f);
231  if (rate < 0) {
232  av_log(s, AV_LOG_ERROR, "Invalid sample rate\n");
233  return AVERROR_INVALIDDATA;
234  }
235  avio_r8(pb); /* wave base bit */
236  avio_r8(pb); /* time base d */
237  avio_r8(pb); /* time base g */
238 
239  /* Skip some unused chunks that may or may not be present */
240  for (;; avio_skip(pb, size)) {
241  tag = avio_rl32(pb);
242  size = avio_rb32(pb);
243  if (tag == MKTAG('A', 't', 's', 'q'))
244  continue;
245  if (tag == MKTAG('A', 's', 'p', 'I'))
246  continue;
247  break;
248  }
249 
250  /* Make sure it's followed by an Awa chunk, aka wave data */
251  if ((tag & 0xffffff) != MKTAG('A', 'w', 'a', 0)) {
252  av_log(s, AV_LOG_ERROR, "Unexpected SMAF chunk %08x\n", tag);
253  return AVERROR_INVALIDDATA;
254  }
255  mmf->data_end = avio_tell(pb) + size;
256 
257  st = avformat_new_stream(s, NULL);
258  if (!st)
259  return AVERROR(ENOMEM);
260 
263  st->codecpar->sample_rate = rate;
264  st->codecpar->channels = (params >> 7) + 1;
267  st->codecpar->bit_rate = st->codecpar->sample_rate *
269 
270  avpriv_set_pts_info(st, 64, 1, st->codecpar->sample_rate);
271 
272  return 0;
273 }
274 
275 #define MAX_SIZE 4096
276 
278 {
279  MMFContext *mmf = s->priv_data;
280  int64_t left, size;
281  int ret;
282 
283  left = mmf->data_end - avio_tell(s->pb);
284  size = FFMIN(left, MAX_SIZE);
285  if (avio_feof(s->pb) || size <= 0)
286  return AVERROR_EOF;
287 
288  ret = av_get_packet(s->pb, pkt, size);
289  if (ret < 0)
290  return ret;
291 
292  pkt->stream_index = 0;
293 
294  return ret;
295 }
296 
297 #if CONFIG_MMF_DEMUXER
299  .name = "mmf",
300  .long_name = NULL_IF_CONFIG_SMALL("Yamaha SMAF"),
301  .priv_data_size = sizeof(MMFContext),
306 };
307 #endif
308 
309 #if CONFIG_MMF_MUXER
311  .name = "mmf",
312  .long_name = NULL_IF_CONFIG_SMALL("Yamaha SMAF"),
313  .mime_type = "application/vnd.smaf",
314  .extensions = "mmf",
315  .priv_data_size = sizeof(MMFContext),
316  .audio_codec = AV_CODEC_ID_ADPCM_YAMAHA,
317  .video_codec = AV_CODEC_ID_NONE,
318  .write_header = mmf_write_header,
320  .write_trailer = mmf_write_trailer,
321 };
322 #endif
static double val(void *priv, double ch)
Definition: aeval.c:76
AVInputFormat ff_mmf_demuxer
AVOutputFormat ff_mmf_muxer
#define FF_COMPLIANCE_EXPERIMENTAL
Allow nonstandardized experimental things.
Definition: avcodec.h:1606
Main libavformat public API header.
#define AVPROBE_SCORE_MAX
maximum score
Definition: avformat.h:453
#define AVFMT_FLAG_BITEXACT
When muxing, try to avoid writing any random/volatile data to the output.
Definition: avformat.h:1380
int av_get_packet(AVIOContext *s, AVPacket *pkt, int size)
Allocate and read the payload of a packet and initialize its fields with default values.
Definition: utils.c:310
#define AVFMT_GENERIC_INDEX
Use generic index building code.
Definition: avformat.h:463
int64_t avio_seek(AVIOContext *s, int64_t offset, int whence)
fseek() equivalent for AVIOContext.
Definition: aviobuf.c:253
#define AVIO_SEEKABLE_NORMAL
Seeking works like for a local file.
Definition: avio.h:40
void avio_w8(AVIOContext *s, int b)
Definition: aviobuf.c:203
void avio_wb32(AVIOContext *s, unsigned int val)
Definition: aviobuf.c:383
int avio_feof(AVIOContext *s)
Similar to feof() but also returns nonzero on read errors.
Definition: aviobuf.c:364
static av_always_inline int64_t avio_tell(AVIOContext *s)
ftell() equivalent for AVIOContext.
Definition: avio.h:557
int64_t avio_skip(AVIOContext *s, int64_t offset)
Skip given number of bytes forward.
Definition: aviobuf.c:337
unsigned int avio_rl32(AVIOContext *s)
Definition: aviobuf.c:750
void avio_write(AVIOContext *s, const unsigned char *buf, int size)
Definition: aviobuf.c:225
unsigned int avio_rb32(AVIOContext *s)
Definition: aviobuf.c:781
int avio_r8(AVIOContext *s)
Definition: aviobuf.c:624
static av_always_inline void ffio_wfourcc(AVIOContext *pb, const uint8_t *s)
Definition: avio_internal.h:58
static int read_packet(void *opaque, uint8_t *buf, int buf_size)
Definition: avio_reading.c:42
#define flags(name, subs,...)
Definition: cbs_av1.c:561
#define s(width, name)
Definition: cbs_vp9.c:257
audio channel layout utility functions
#define FFMIN(a, b)
Definition: common.h:105
#define MKTAG(a, b, c, d)
Definition: common.h:478
#define NULL
Definition: coverity.c:32
static void write_packet(OutputFile *of, AVPacket *pkt, OutputStream *ost, int unqueue)
Definition: ffmpeg.c:729
static int read_header(FFV1Context *f)
Definition: ffv1dec.c:527
static void write_header(FFV1Context *f)
Definition: ffv1enc.c:346
#define AV_CH_LAYOUT_MONO
#define AV_CH_LAYOUT_STEREO
@ AV_CODEC_ID_NONE
Definition: codec_id.h:47
@ AV_CODEC_ID_ADPCM_YAMAHA
Definition: codec_id.h:367
AVStream * avformat_new_stream(AVFormatContext *s, const AVCodec *c)
Add a new stream to a media file.
Definition: utils.c:4505
#define AVERROR_PATCHWELCOME
Not yet implemented in FFmpeg, patches welcome.
Definition: error.h:62
#define AVERROR_INVALIDDATA
Invalid data found when processing input.
Definition: error.h:59
#define AVERROR_EOF
End of file.
Definition: error.h:55
#define AVERROR(e)
Definition: error.h:43
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
Definition: log.h:194
@ AVMEDIA_TYPE_AUDIO
Definition: avutil.h:202
int i
Definition: input.c:407
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:4941
static int read_probe(const AVProbeData *pd)
Definition: jvdec.c:55
int ff_raw_write_packet(AVFormatContext *s, AVPacket *pkt)
Definition: rawenc.c:29
#define LIBAVFORMAT_IDENT
Definition: version.h:46
common internal API header
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification.
Definition: internal.h:117
version
Definition: libkvazaar.c:320
static int mmf_read_header(AVFormatContext *s)
Definition: mmf.c:192
#define MAX_SIZE
Definition: mmf.c:275
static int mmf_read_packet(AVFormatContext *s, AVPacket *pkt)
Definition: mmf.c:277
static int mmf_rate(int code)
Definition: mmf.c:38
static int mmf_probe(const AVProbeData *p)
Definition: mmf.c:179
static const int mmf_rates[]
Definition: mmf.c:36
uint32_t tag
Definition: movenc.c:1600
internal header for RIFF based (de)muxers do NOT include this in end user applications
int64_t ff_start_tag(AVIOContext *pb, const char *tag)
Definition: riffenc.c:31
const uint8_t * code
Definition: spdifenc.c:413
unsigned int pos
Definition: spdifenc.c:412
uint64_t channel_layout
Audio only.
Definition: codec_par.h:162
int bits_per_coded_sample
The number of bits per sample in the codedwords.
Definition: codec_par.h:102
int channels
Audio only.
Definition: codec_par.h:166
int64_t bit_rate
The average bitrate of the encoded data (in bits per second).
Definition: codec_par.h:89
enum AVMediaType codec_type
General type of the encoded data.
Definition: codec_par.h:56
enum AVCodecID codec_id
Specific type of the encoded data (the codec used).
Definition: codec_par.h:60
int sample_rate
Audio only.
Definition: codec_par.h:170
Format I/O context.
Definition: avformat.h:1232
Bytestream IO Context.
Definition: avio.h:161
const char * name
A comma separated list of short names for the format.
Definition: avformat.h:645
const char * name
Definition: avformat.h:491
This structure stores compressed data.
Definition: packet.h:346
int stream_index
Definition: packet.h:371
This structure contains the data a format has to probe a file.
Definition: avformat.h:441
unsigned char * buf
Buffer must have AVPROBE_PADDING_SIZE of extra allocated bytes filled with zero.
Definition: avformat.h:443
Stream structure.
Definition: avformat.h:873
AVCodecParameters * codecpar
Codec parameters associated with this stream.
Definition: avformat.h:1038
Definition: mmf.c:30
int stereo
Definition: mmf.c:33
int64_t atrpos
Definition: mmf.c:31
int64_t awapos
Definition: mmf.c:31
int64_t data_end
Definition: mmf.c:32
int64_t atsqpos
Definition: mmf.c:31
#define av_log(a,...)
AVPacket * pkt
Definition: movenc.c:59
int size
static int write_trailer(AVFormatContext *s1)
Definition: v4l2enc.c:98