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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 &&
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  avio_flush(pb);
127 
128  return 0;
129 }
130 
131 /* Write a variable-length symbol */
132 static void put_varlength(AVIOContext *pb, int val)
133 {
134  if (val < 128)
135  avio_w8(pb, val);
136  else {
137  val -= 128;
138  avio_w8(pb, 0x80 | val >> 7);
139  avio_w8(pb, 0x7f & val);
140  }
141 }
142 
143 static int mmf_write_trailer(AVFormatContext *s)
144 {
145  AVIOContext *pb = s->pb;
146  MMFContext *mmf = s->priv_data;
147  int64_t pos, size;
148  int gatetime;
149 
150  if (s->pb->seekable) {
151  /* Fill in length fields */
152  end_tag_be(pb, mmf->awapos);
153  end_tag_be(pb, mmf->atrpos);
154  end_tag_be(pb, 8);
155 
156  pos = avio_tell(pb);
157  size = pos - mmf->awapos;
158 
159  /* Fill Atsq chunk */
160  avio_seek(pb, mmf->atsqpos, SEEK_SET);
161 
162  /* "play wav" */
163  avio_w8(pb, 0); /* start time */
164  avio_w8(pb, (mmf->stereo << 6) | 1); /* (channel << 6) | wavenum */
165  gatetime = size * 500 / s->streams[0]->codecpar->sample_rate;
166  put_varlength(pb, gatetime); /* duration */
167 
168  /* "nop" */
169  put_varlength(pb, gatetime); /* start time */
170  avio_write(pb, "\xff\x00", 2); /* nop */
171 
172  /* "end of sequence" */
173  avio_write(pb, "\x00\x00\x00\x00", 4);
174 
175  avio_seek(pb, pos, SEEK_SET);
176 
177  avio_flush(pb);
178  }
179  return 0;
180 }
181 #endif /* CONFIG_MMF_MUXER */
182 
183 static int mmf_probe(AVProbeData *p)
184 {
185  /* check file header */
186  if (p->buf[0] == 'M' && p->buf[1] == 'M' &&
187  p->buf[2] == 'M' && p->buf[3] == 'D' &&
188  p->buf[8] == 'C' && p->buf[9] == 'N' &&
189  p->buf[10] == 'T' && p->buf[11] == 'I')
190  return AVPROBE_SCORE_MAX;
191  else
192  return 0;
193 }
194 
195 /* mmf input */
197 {
198  MMFContext *mmf = s->priv_data;
199  unsigned int tag;
200  AVIOContext *pb = s->pb;
201  AVStream *st;
202  int64_t size;
203  int rate, params;
204 
205  tag = avio_rl32(pb);
206  if (tag != MKTAG('M', 'M', 'M', 'D'))
207  return AVERROR_INVALIDDATA;
208  avio_skip(pb, 4); /* file_size */
209 
210  /* Skip some unused chunks that may or may not be present */
211  for (;; avio_skip(pb, size)) {
212  tag = avio_rl32(pb);
213  size = avio_rb32(pb);
214  if (tag == MKTAG('C', 'N', 'T', 'I'))
215  continue;
216  if (tag == MKTAG('O', 'P', 'D', 'A'))
217  continue;
218  break;
219  }
220 
221  /* Tag = "ATRx", where "x" = track number */
222  if ((tag & 0xffffff) == MKTAG('M', 'T', 'R', 0)) {
223  av_log(s, AV_LOG_ERROR, "MIDI like format found, unsupported\n");
224  return AVERROR_PATCHWELCOME;
225  }
226  if ((tag & 0xffffff) != MKTAG('A', 'T', 'R', 0)) {
227  av_log(s, AV_LOG_ERROR, "Unsupported SMAF chunk %08x\n", tag);
228  return AVERROR_PATCHWELCOME;
229  }
230 
231  avio_r8(pb); /* format type */
232  avio_r8(pb); /* sequence type */
233  params = avio_r8(pb); /* (channel << 7) | (format << 4) | rate */
234  rate = mmf_rate(params & 0x0f);
235  if (rate < 0) {
236  av_log(s, AV_LOG_ERROR, "Invalid sample rate\n");
237  return AVERROR_INVALIDDATA;
238  }
239  avio_r8(pb); /* wave base bit */
240  avio_r8(pb); /* time base d */
241  avio_r8(pb); /* time base g */
242 
243  /* Skip some unused chunks that may or may not be present */
244  for (;; avio_skip(pb, size)) {
245  tag = avio_rl32(pb);
246  size = avio_rb32(pb);
247  if (tag == MKTAG('A', 't', 's', 'q'))
248  continue;
249  if (tag == MKTAG('A', 's', 'p', 'I'))
250  continue;
251  break;
252  }
253 
254  /* Make sure it's followed by an Awa chunk, aka wave data */
255  if ((tag & 0xffffff) != MKTAG('A', 'w', 'a', 0)) {
256  av_log(s, AV_LOG_ERROR, "Unexpected SMAF chunk %08x\n", tag);
257  return AVERROR_INVALIDDATA;
258  }
259  mmf->data_end = avio_tell(pb) + size;
260 
261  st = avformat_new_stream(s, NULL);
262  if (!st)
263  return AVERROR(ENOMEM);
264 
267  st->codecpar->sample_rate = rate;
268  st->codecpar->channels = (params >> 7) + 1;
271  st->codecpar->bit_rate = st->codecpar->sample_rate *
273 
274  avpriv_set_pts_info(st, 64, 1, st->codecpar->sample_rate);
275 
276  return 0;
277 }
278 
279 #define MAX_SIZE 4096
280 
282 {
283  MMFContext *mmf = s->priv_data;
284  int64_t left, size;
285  int ret;
286 
287  left = mmf->data_end - avio_tell(s->pb);
288  size = FFMIN(left, MAX_SIZE);
289  if (avio_feof(s->pb) || size <= 0)
290  return AVERROR_EOF;
291 
292  ret = av_get_packet(s->pb, pkt, size);
293  if (ret < 0)
294  return ret;
295 
296  pkt->stream_index = 0;
297 
298  return ret;
299 }
300 
301 #if CONFIG_MMF_DEMUXER
302 AVInputFormat ff_mmf_demuxer = {
303  .name = "mmf",
304  .long_name = NULL_IF_CONFIG_SMALL("Yamaha SMAF"),
305  .priv_data_size = sizeof(MMFContext),
310 };
311 #endif
312 
313 #if CONFIG_MMF_MUXER
314 AVOutputFormat ff_mmf_muxer = {
315  .name = "mmf",
316  .long_name = NULL_IF_CONFIG_SMALL("Yamaha SMAF"),
317  .mime_type = "application/vnd.smaf",
318  .extensions = "mmf",
319  .priv_data_size = sizeof(MMFContext),
320  .audio_codec = AV_CODEC_ID_ADPCM_YAMAHA,
321  .video_codec = AV_CODEC_ID_NONE,
322  .write_header = mmf_write_header,
324  .write_trailer = mmf_write_trailer,
325 };
326 #endif
#define FF_COMPLIANCE_EXPERIMENTAL
Allow nonstandardized experimental things.
Definition: avcodec.h:2882
#define NULL
Definition: coverity.c:32
const char const char void * val
Definition: avisynth_c.h:771
const char * s
Definition: avisynth_c.h:768
Bytestream IO Context.
Definition: avio.h:147
#define AVERROR_INVALIDDATA
Invalid data found when processing input.
Definition: error.h:59
int64_t awapos
Definition: mmf.c:31
int64_t ff_start_tag(AVIOContext *pb, const char *tag)
Definition: riffenc.c:31
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:4504
enum AVCodecID codec_id
Specific type of the encoded data (the codec used).
Definition: avcodec.h:3953
int64_t avio_seek(AVIOContext *s, int64_t offset, int whence)
fseek() equivalent for AVIOContext.
Definition: aviobuf.c:230
Definition: mmf.c:30
int64_t avio_skip(AVIOContext *s, int64_t offset)
Skip given number of bytes forward.
Definition: aviobuf.c:304
int version
Definition: avisynth_c.h:766
static AVPacket pkt
#define AV_CH_LAYOUT_STEREO
int stereo
Definition: mmf.c:33
int strict_std_compliance
Allow non-standard and experimental extension.
Definition: avformat.h:1609
static int mmf_probe(AVProbeData *p)
Definition: mmf.c:183
Format I/O context.
Definition: avformat.h:1327
static int mmf_rate(int code)
Definition: mmf.c:38
unsigned int avio_rb32(AVIOContext *s)
Definition: aviobuf.c:757
AVStream * avformat_new_stream(AVFormatContext *s, const AVCodec *c)
Add a new stream to a media file.
Definition: utils.c:4137
AVStream ** streams
A list of all streams in the file.
Definition: avformat.h:1395
int flags
Flags modifying the (de)muxer behaviour.
Definition: avformat.h:1438
uint32_t tag
Definition: movenc.c:1376
#define AVERROR_EOF
End of file.
Definition: error.h:55
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:260
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
void avio_write(AVIOContext *s, const unsigned char *buf, int size)
Definition: aviobuf.c:204
#define MAX_SIZE
Definition: mmf.c:279
static av_always_inline void ffio_wfourcc(AVIOContext *pb, const uint8_t *s)
Definition: avio_internal.h:66
#define AVFMT_FLAG_BITEXACT
When muxing, try to avoid writing any random/volatile data to the output.
Definition: avformat.h:1455
uint64_t channel_layout
Audio only.
Definition: avcodec.h:4055
#define av_log(a,...)
int64_t bit_rate
The average bitrate of the encoded data (in bits per second).
Definition: avcodec.h:3982
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
Definition: log.h:176
unsigned int avio_rl32(AVIOContext *s)
Definition: aviobuf.c:726
#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:3949
GLenum GLint * params
Definition: opengl_enc.c:114
int avio_r8(AVIOContext *s)
Definition: aviobuf.c:595
unsigned char * buf
Buffer must have AVPROBE_PADDING_SIZE of extra allocated bytes filled with zero.
Definition: avformat.h:463
#define LIBAVFORMAT_IDENT
Definition: version.h:46
int seekable
A combination of AVIO_SEEKABLE_ flags or 0 when the stream is not seekable.
Definition: avio.h:243
int void avio_flush(AVIOContext *s)
Force flushing of buffered data.
Definition: aviobuf.c:224
audio channel layout utility functions
#define FFMIN(a, b)
Definition: common.h:96
static int read_probe(AVProbeData *pd)
Definition: jvdec.c:55
int64_t data_end
Definition: mmf.c:32
static int write_trailer(AVFormatContext *s1)
Definition: v4l2enc.c:94
const char * name
Definition: avformat.h:524
internal header for RIFF based (de)muxers do NOT include this in end user applications ...
int ff_raw_write_packet(AVFormatContext *s, AVPacket *pkt)
Definition: rawenc.c:26
int64_t atsqpos
Definition: mmf.c:31
static int read_header(FFV1Context *f)
Definition: ffv1dec.c:514
Stream structure.
Definition: avformat.h:878
#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
AVIOContext * pb
I/O context.
Definition: avformat.h:1369
void avio_w8(AVIOContext *s, int b)
Definition: aviobuf.c:182
#define AVFMT_GENERIC_INDEX
Use generic index building code.
Definition: avformat.h:487
static int mmf_read_header(AVFormatContext *s)
Definition: mmf.c:196
This structure contains the data a format has to probe a file.
Definition: avformat.h:461
static int flags
Definition: cpu.c:47
static const int mmf_rates[]
Definition: mmf.c:36
int sample_rate
Audio only.
Definition: avcodec.h:4063
#define AVPROBE_SCORE_MAX
maximum score
Definition: avformat.h:473
Main libavformat public API header.
static int mmf_read_packet(AVFormatContext *s, AVPacket *pkt)
Definition: mmf.c:281
void * priv_data
Format private data.
Definition: avformat.h:1355
static void write_header(FFV1Context *f)
Definition: ffv1enc.c:344
int bits_per_coded_sample
The number of bits per sample in the codedwords.
Definition: avcodec.h:3995
int channels
Audio only.
Definition: avcodec.h:4059
void avio_wb32(AVIOContext *s, unsigned int val)
Definition: aviobuf.c:354
void INT64 start
Definition: avisynth_c.h:690
const char * name
A comma separated list of short names for the format.
Definition: avformat.h:662
AVCodecParameters * codecpar
Definition: avformat.h:1230
int avio_feof(AVIOContext *s)
feof() equivalent for AVIOContext.
Definition: aviobuf.c:328
int stream_index
Definition: avcodec.h:1592
#define AV_CH_LAYOUT_MONO
#define MKTAG(a, b, c, d)
Definition: common.h:342
This structure stores compressed data.
Definition: avcodec.h:1567
static int write_packet(AVFormatContext *s1, AVPacket *pkt)
Definition: v4l2enc.c:86
int64_t atrpos
Definition: mmf.c:31