FFmpeg coverage

Directory: ../../../ffmpeg/
File: src/libavformat/mmf.c
Date: 2023-12-07 21:54:23
Exec Total Coverage
Lines: 136 157 86.6%
Functions: 9 9 100.0%
Branches: 38 62 61.3%
Line Branch Exec Source
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 "config_components.h"
23
24 #include "libavutil/channel_layout.h"
25 #include "avformat.h"
26 #include "avio_internal.h"
27 #include "internal.h"
28 #include "mux.h"
29 #include "pcm.h"
30 #include "rawenc.h"
31 #include "riff.h"
32 #include "version.h"
33
34 typedef struct MMFContext {
35 int64_t atrpos, atsqpos, awapos;
36 int64_t data_end;
37 int stereo;
38 } MMFContext;
39
40 static const int mmf_rates[] = { 4000, 8000, 11025, 22050, 44100 };
41
42 2 static int mmf_rate(int code)
43 {
44
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 2 if ((code < 0) || (code > 4))
45 ✗ return -1;
46 2 return mmf_rates[code];
47 }
48
49 #if CONFIG_MMF_MUXER
50 1 static int mmf_rate_code(int rate)
51 {
52 int i;
53
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 5 for (i = 0; i < 5; i++)
54
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 5 if (mmf_rates[i] == rate)
55 1 return i;
56 ✗ return -1;
57 }
58
59 /* Copy of end_tag() from avienc.c, but for big-endian chunk size */
60 5 static void end_tag_be(AVIOContext *pb, int64_t start)
61 {
62 int64_t pos;
63
64 5 pos = avio_tell(pb);
65 5 avio_seek(pb, start - 4, SEEK_SET);
66 5 avio_wb32(pb, (uint32_t)(pos - start));
67 5 avio_seek(pb, pos, SEEK_SET);
68 5 }
69
70 1 static int mmf_write_header(AVFormatContext *s)
71 {
72 1 MMFContext *mmf = s->priv_data;
73 1 AVIOContext *pb = s->pb;
74 int64_t pos;
75 int rate;
76 2 const char *version = s->flags & AVFMT_FLAG_BITEXACT ?
77
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 1 "VN:Lavf," :
78 "VN:"LIBAVFORMAT_IDENT",";
79
80 1 rate = mmf_rate_code(s->streams[0]->codecpar->sample_rate);
81
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 1 if (rate < 0) {
82 ✗ av_log(s, AV_LOG_ERROR, "Unsupported sample rate %d, supported are 4000, 8000, 11025, 22050 and 44100\n",
83 ✗ s->streams[0]->codecpar->sample_rate);
84 ✗ return AVERROR(EINVAL);
85 }
86
87 1 mmf->stereo = s->streams[0]->codecpar->ch_layout.nb_channels > 1;
88
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 1 if (mmf->stereo &&
89 ✗ s->strict_std_compliance > FF_COMPLIANCE_EXPERIMENTAL) {
90 ✗ av_log(s, AV_LOG_ERROR, "Yamaha SMAF stereo is experimental, "
91 "add '-strict %d' if you want to use it.\n",
92 FF_COMPLIANCE_EXPERIMENTAL);
93 ✗ return AVERROR(EINVAL);
94 }
95
96 1 ffio_wfourcc(pb, "MMMD");
97 1 avio_wb32(pb, 0);
98 1 pos = ff_start_tag(pb, "CNTI");
99 1 avio_w8(pb, 0); /* class */
100 1 avio_w8(pb, 1); /* type */
101 1 avio_w8(pb, 1); /* code type */
102 1 avio_w8(pb, 0); /* status */
103 1 avio_w8(pb, 0); /* counts */
104 1 end_tag_be(pb, pos);
105
106 1 pos = ff_start_tag(pb, "OPDA");
107 1 avio_write(pb, version, strlen(version)); /* metadata ("ST:songtitle,VN:version,...") */
108 1 end_tag_be(pb, pos);
109
110 1 avio_write(pb, "ATR\x00", 4);
111 1 avio_wb32(pb, 0);
112 1 mmf->atrpos = avio_tell(pb);
113 1 avio_w8(pb, 0); /* format type */
114 1 avio_w8(pb, 0); /* sequence type */
115 1 avio_w8(pb, (mmf->stereo << 7) | (1 << 4) | rate); /* (channel << 7) | (format << 4) | rate */
116 1 avio_w8(pb, 0); /* wave base bit */
117 1 avio_w8(pb, 2); /* time base d */
118 1 avio_w8(pb, 2); /* time base g */
119
120 1 ffio_wfourcc(pb, "Atsq");
121 1 avio_wb32(pb, 16);
122 1 mmf->atsqpos = avio_tell(pb);
123 /* Will be filled on close */
124 1 avio_write(pb, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00", 16);
125
126 1 mmf->awapos = ff_start_tag(pb, "Awa\x01");
127
128 1 avpriv_set_pts_info(s->streams[0], 64, 1, s->streams[0]->codecpar->sample_rate);
129
130 1 return 0;
131 }
132
133 /* Write a variable-length symbol */
134 2 static void put_varlength(AVIOContext *pb, int val)
135 {
136
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 2 if (val < 128)
137 ✗ avio_w8(pb, val);
138 else {
139 2 val -= 128;
140 2 avio_w8(pb, 0x80 | val >> 7);
141 2 avio_w8(pb, 0x7f & val);
142 }
143 2 }
144
145 1 static int mmf_write_trailer(AVFormatContext *s)
146 {
147 1 AVIOContext *pb = s->pb;
148 1 MMFContext *mmf = s->priv_data;
149 int64_t pos, size;
150 int gatetime;
151
152
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 1 if (s->pb->seekable & AVIO_SEEKABLE_NORMAL) {
153 /* Fill in length fields */
154 1 end_tag_be(pb, mmf->awapos);
155 1 end_tag_be(pb, mmf->atrpos);
156 1 end_tag_be(pb, 8);
157
158 1 pos = avio_tell(pb);
159 1 size = pos - mmf->awapos;
160
161 /* Fill Atsq chunk */
162 1 avio_seek(pb, mmf->atsqpos, SEEK_SET);
163
164 /* "play wav" */
165 1 avio_w8(pb, 0); /* start time */
166 1 avio_w8(pb, (mmf->stereo << 6) | 1); /* (channel << 6) | wavenum */
167 1 gatetime = size * 500 / s->streams[0]->codecpar->sample_rate;
168 1 put_varlength(pb, gatetime); /* duration */
169
170 /* "nop" */
171 1 put_varlength(pb, gatetime); /* start time */
172 1 avio_write(pb, "\xff\x00", 2); /* nop */
173
174 /* "end of sequence" */
175 1 avio_write(pb, "\x00\x00\x00\x00", 4);
176
177 1 avio_seek(pb, pos, SEEK_SET);
178 }
179 1 return 0;
180 }
181 #endif /* CONFIG_MMF_MUXER */
182
183 6956 static int mmf_probe(const AVProbeData *p)
184 {
185 /* check file header */
186
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 6956 if (p->buf[0] == 'M' && p->buf[1] == 'M' &&
187
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 4 p->buf[2] == 'M' && p->buf[3] == 'D' &&
188
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 2 p->buf[8] == 'C' && p->buf[9] == 'N' &&
189
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 2 p->buf[10] == 'T' && p->buf[11] == 'I')
190 2 return AVPROBE_SCORE_MAX;
191 else
192 6954 return 0;
193 }
194
195 /* mmf input */
196 2 static int mmf_read_header(AVFormatContext *s)
197 {
198 2 MMFContext *mmf = s->priv_data;
199 unsigned int tag;
200 2 AVIOContext *pb = s->pb;
201 AVStream *st;
202 int64_t size;
203 int rate, params;
204
205 2 tag = avio_rl32(pb);
206
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 2 if (tag != MKTAG('M', 'M', 'M', 'D'))
207 ✗ return AVERROR_INVALIDDATA;
208 2 avio_skip(pb, 4); /* file_size */
209
210 /* Skip some unused chunks that may or may not be present */
211 4 for (;; avio_skip(pb, size)) {
212 6 tag = avio_rl32(pb);
213 6 size = avio_rb32(pb);
214
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 6 if (tag == MKTAG('C', 'N', 'T', 'I'))
215 2 continue;
216
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 4 if (tag == MKTAG('O', 'P', 'D', 'A'))
217 2 continue;
218 2 break;
219 }
220
221 /* Tag = "ATRx", where "x" = track number */
222
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 2 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
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 2 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 2 avio_r8(pb); /* format type */
232 2 avio_r8(pb); /* sequence type */
233 2 params = avio_r8(pb); /* (channel << 7) | (format << 4) | rate */
234 2 rate = mmf_rate(params & 0x0f);
235
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 2 if (rate < 0) {
236 ✗ av_log(s, AV_LOG_ERROR, "Invalid sample rate\n");
237 ✗ return AVERROR_INVALIDDATA;
238 }
239 2 avio_r8(pb); /* wave base bit */
240 2 avio_r8(pb); /* time base d */
241 2 avio_r8(pb); /* time base g */
242
243 /* Skip some unused chunks that may or may not be present */
244 2 for (;; avio_skip(pb, size)) {
245 4 tag = avio_rl32(pb);
246 4 size = avio_rb32(pb);
247
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 4 if (tag == MKTAG('A', 't', 's', 'q'))
248 2 continue;
249
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 2 if (tag == MKTAG('A', 's', 'p', 'I'))
250 ✗ continue;
251 2 break;
252 }
253
254 /* Make sure it's followed by an Awa chunk, aka wave data */
255
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 2 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 2 mmf->data_end = avio_tell(pb) + size;
260
261 2 st = avformat_new_stream(s, NULL);
262
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 2 if (!st)
263 ✗ return AVERROR(ENOMEM);
264
265 2 st->codecpar->codec_type = AVMEDIA_TYPE_AUDIO;
266 2 st->codecpar->codec_id = AV_CODEC_ID_ADPCM_YAMAHA;
267 2 st->codecpar->sample_rate = rate;
268 2 av_channel_layout_default(&st->codecpar->ch_layout, (params >> 7) + 1);
269 2 st->codecpar->bits_per_coded_sample = 4;
270 2 st->codecpar->bit_rate = st->codecpar->sample_rate *
271 2 st->codecpar->bits_per_coded_sample;
272
273 2 avpriv_set_pts_info(st, 64, 1, st->codecpar->sample_rate);
274
275 2 return 0;
276 }
277
278 #define MAX_SIZE 4096
279
280 58 static int mmf_read_packet(AVFormatContext *s, AVPacket *pkt)
281 {
282 58 MMFContext *mmf = s->priv_data;
283 int64_t left, size;
284 int ret;
285
286 58 left = mmf->data_end - avio_tell(s->pb);
287 58 size = FFMIN(left, MAX_SIZE);
288
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 58 if (avio_feof(s->pb) || size <= 0)
289 15 return AVERROR_EOF;
290
291 43 ret = av_get_packet(s->pb, pkt, size);
292
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 43 if (ret < 0)
293 ✗ return ret;
294
295 43 pkt->stream_index = 0;
296
297 43 return ret;
298 }
299
300 #if CONFIG_MMF_DEMUXER
301 const AVInputFormat ff_mmf_demuxer = {
302 .name = "mmf",
303 .long_name = NULL_IF_CONFIG_SMALL("Yamaha SMAF"),
304 .priv_data_size = sizeof(MMFContext),
305 .read_probe = mmf_probe,
306 .read_header = mmf_read_header,
307 .read_packet = mmf_read_packet,
308 .flags = AVFMT_GENERIC_INDEX,
309 };
310 #endif
311
312 #if CONFIG_MMF_MUXER
313 const FFOutputFormat ff_mmf_muxer = {
314 .p.name = "mmf",
315 .p.long_name = NULL_IF_CONFIG_SMALL("Yamaha SMAF"),
316 .p.mime_type = "application/vnd.smaf",
317 .p.extensions = "mmf",
318 .priv_data_size = sizeof(MMFContext),
319 .p.audio_codec = AV_CODEC_ID_ADPCM_YAMAHA,
320 .p.video_codec = AV_CODEC_ID_NONE,
321 .write_header = mmf_write_header,
322 .write_packet = ff_raw_write_packet,
323 .write_trailer = mmf_write_trailer,
324 };
325 #endif
326