blob: 1393627d8abc87b014caf753d458d2c41612c10a
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 | |
22 | #include "libavutil/channel_layout.h" |
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", |
88 | FF_COMPLIANCE_EXPERIMENTAL); |
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 & AVIO_SEEKABLE_NORMAL) { |
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 */ |
196 | static int mmf_read_header(AVFormatContext *s) |
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 | |
265 | st->codecpar->codec_type = AVMEDIA_TYPE_AUDIO; |
266 | st->codecpar->codec_id = AV_CODEC_ID_ADPCM_YAMAHA; |
267 | st->codecpar->sample_rate = rate; |
268 | st->codecpar->channels = (params >> 7) + 1; |
269 | st->codecpar->channel_layout = params >> 7 ? AV_CH_LAYOUT_STEREO : AV_CH_LAYOUT_MONO; |
270 | st->codecpar->bits_per_coded_sample = 4; |
271 | st->codecpar->bit_rate = st->codecpar->sample_rate * |
272 | st->codecpar->bits_per_coded_sample; |
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 | |
281 | static int mmf_read_packet(AVFormatContext *s, AVPacket *pkt) |
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), |
306 | .read_probe = mmf_probe, |
307 | .read_header = mmf_read_header, |
308 | .read_packet = mmf_read_packet, |
309 | .flags = AVFMT_GENERIC_INDEX, |
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, |
323 | .write_packet = ff_raw_write_packet, |
324 | .write_trailer = mmf_write_trailer, |
325 | }; |
326 | #endif |
327 |