aboutsummaryrefslogtreecommitdiffstats
path: root/libavformat/wavenc.c
blob: 0067dfef29bd60d323646b5d2b8dd6716ffd9692 (plain) (blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
/*
 * WAV muxer
 * Copyright (c) 2001, 2002 Fabrice Bellard
 *
 * Sony Wave64 muxer
 * Copyright (c) 2012 Paul B Mahol
 *
 * WAV muxer RF64 support
 * Copyright (c) 2013 Daniel Verkamp <daniel@drv.nu>
 *
 * This file is part of FFmpeg.
 *
 * FFmpeg is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 *
 * FFmpeg is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with FFmpeg; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
 */

#include <stdint.h>
#include <string.h>

#include "libavutil/dict.h"
#include "libavutil/common.h"
#include "libavutil/mathematics.h"
#include "libavutil/opt.h"

#include "avformat.h"
#include "avio.h"
#include "avio_internal.h"
#include "internal.h"
#include "riff.h"

#define RF64_AUTO   (-1)
#define RF64_NEVER  0
#define RF64_ALWAYS 1

typedef struct WAVMuxContext {
    const AVClass *class;
    int64_t data;
    int64_t fact_pos;
    int64_t ds64;
    int64_t minpts;
    int64_t maxpts;
    int last_duration;
    int write_bext;
    int rf64;
} WAVMuxContext;

#if CONFIG_WAV_MUXER
static inline void bwf_write_bext_string(AVFormatContext *s, const char *key, int maxlen)
{
    AVDictionaryEntry *tag;
    int len = 0;

    if (tag = av_dict_get(s->metadata, key, NULL, 0)) {
        len = strlen(tag->value);
        len = FFMIN(len, maxlen);
        avio_write(s->pb, tag->value, len);
    }

    ffio_fill(s->pb, 0, maxlen - len);
}

static void bwf_write_bext_chunk(AVFormatContext *s)
{
    AVDictionaryEntry *tmp_tag;
    uint64_t time_reference = 0;
    int64_t bext = ff_start_tag(s->pb, "bext");

    bwf_write_bext_string(s, "description", 256);
    bwf_write_bext_string(s, "originator", 32);
    bwf_write_bext_string(s, "originator_reference", 32);
    bwf_write_bext_string(s, "origination_date", 10);
    bwf_write_bext_string(s, "origination_time", 8);

    if (tmp_tag = av_dict_get(s->metadata, "time_reference", NULL, 0))
        time_reference = strtoll(tmp_tag->value, NULL, 10);
    avio_wl64(s->pb, time_reference);
    avio_wl16(s->pb, 1);  // set version to 1

    if (tmp_tag = av_dict_get(s->metadata, "umid", NULL, 0)) {
        unsigned char umidpart_str[17] = {0};
        int i;
        uint64_t umidpart;
        int len = strlen(tmp_tag->value+2);

        for (i = 0; i < len/16; i++) {
            memcpy(umidpart_str, tmp_tag->value + 2 + (i*16), 16);
            umidpart = strtoll(umidpart_str, NULL, 16);
            avio_wb64(s->pb, umidpart);
        }
        ffio_fill(s->pb, 0, 64 - i*8);
    } else
        ffio_fill(s->pb, 0, 64); // zero UMID

    ffio_fill(s->pb, 0, 190); // Reserved

    if (tmp_tag = av_dict_get(s->metadata, "coding_history", NULL, 0))
        avio_put_str(s->pb, tmp_tag->value);

    ff_end_tag(s->pb, bext);
}

static int wav_write_header(AVFormatContext *s)
{
    WAVMuxContext *wav = s->priv_data;
    AVIOContext *pb = s->pb;
    int64_t fmt;

    if (s->nb_streams != 1) {
        av_log(s, AV_LOG_ERROR, "WAVE files have exactly one stream\n");
        return AVERROR(EINVAL);
    }

    if (wav->rf64 == RF64_ALWAYS) {
        ffio_wfourcc(pb, "RF64");
        avio_wl32(pb, -1); /* RF64 chunk size: use size in ds64 */
    } else {
        ffio_wfourcc(pb, "RIFF");
        avio_wl32(pb, 0); /* file length */
    }

    ffio_wfourcc(pb, "WAVE");

    if (wav->rf64 != RF64_NEVER) {
        /* write empty ds64 chunk or JUNK chunk to reserve space for ds64 */
        ffio_wfourcc(pb, wav->rf64 == RF64_ALWAYS ? "ds64" : "JUNK");
        avio_wl32(pb, 28); /* chunk size */
        wav->ds64 = avio_tell(pb);
        ffio_fill(pb, 0, 28);
    }

    /* format header */
    fmt = ff_start_tag(pb, "fmt ");
    if (ff_put_wav_header(pb, s->streams[0]->codec) < 0) {
        av_log(s, AV_LOG_ERROR, "%s codec not supported in WAVE format\n",
               s->streams[0]->codec->codec ? s->streams[0]->codec->codec->name : "NONE");
        return -1;
    }
    ff_end_tag(pb, fmt);

    if (s->streams[0]->codec->codec_tag != 0x01 /* hence for all other than PCM */
        && s->pb->seekable) {
        wav->fact_pos = ff_start_tag(pb, "fact");
        avio_wl32(pb, 0);
        ff_end_tag(pb, wav->fact_pos);
    }

    if (wav->write_bext)
        bwf_write_bext_chunk(s);

    avpriv_set_pts_info(s->streams[0], 64, 1, s->streams[0]->codec->sample_rate);
    wav->maxpts = wav->last_duration = 0;
    wav->minpts = INT64_MAX;

    /* info header */
    ff_riff_write_info(s);

    /* data header */
    wav->data = ff_start_tag(pb, "data");

    avio_flush(pb);

    return 0;
}

static int wav_write_packet(AVFormatContext *s, AVPacket *pkt)
{
    AVIOContext *pb  = s->pb;
    WAVMuxContext    *wav = s->priv_data;
    avio_write(pb, pkt->data, pkt->size);
    if(pkt->pts != AV_NOPTS_VALUE) {
        wav->minpts        = FFMIN(wav->minpts, pkt->pts);
        wav->maxpts        = FFMAX(wav->maxpts, pkt->pts);
        wav->last_duration = pkt->duration;
    } else
        av_log(s, AV_LOG_ERROR, "wav_write_packet: NOPTS\n");
    return 0;
}

static int wav_write_trailer(AVFormatContext *s)
{
    AVIOContext *pb  = s->pb;
    WAVMuxContext    *wav = s->priv_data;
    int64_t file_size, data_size;
    int64_t number_of_samples = 0;
    int rf64 = 0;

    avio_flush(pb);

    if (s->pb->seekable) {
        /* update file size */
        file_size = avio_tell(pb);
        data_size = file_size - wav->data;
        if (wav->rf64 == RF64_ALWAYS || (wav->rf64 == RF64_AUTO && file_size - 8 > UINT32_MAX)) {
            rf64 = 1;
        } else {
            avio_seek(pb, 4, SEEK_SET);
            avio_wl32(pb, (uint32_t)(file_size - 8));
            avio_seek(pb, file_size, SEEK_SET);

            ff_end_tag(pb, wav->data);
            avio_flush(pb);
        }

        number_of_samples = av_rescale(wav->maxpts - wav->minpts + wav->last_duration,
                                       s->streams[0]->codec->sample_rate * (int64_t)s->streams[0]->time_base.num,
                                       s->streams[0]->time_base.den);

        if(s->streams[0]->codec->codec_tag != 0x01) {
            /* Update num_samps in fact chunk */
            avio_seek(pb, wav->fact_pos, SEEK_SET);
            if (rf64 || (wav->rf64 == RF64_AUTO && number_of_samples > UINT32_MAX)) {
                rf64 = 1;
                avio_wl32(pb, -1);
            } else {
                avio_wl32(pb, number_of_samples);
                avio_seek(pb, file_size, SEEK_SET);
                avio_flush(pb);
            }
        }

        if (rf64) {
            /* overwrite RIFF with RF64 */
            avio_seek(pb, 0, SEEK_SET);
            ffio_wfourcc(pb, "RF64");
            avio_wl32(pb, -1);

            /* write ds64 chunk (overwrite JUNK if rf64 == RF64_AUTO) */
            avio_seek(pb, wav->ds64 - 8, SEEK_SET);
            ffio_wfourcc(pb, "ds64");
            avio_wl32(pb, 28);                  /* ds64 chunk size */
            avio_wl64(pb, file_size - 8);       /* RF64 chunk size */
            avio_wl64(pb, data_size);           /* data chunk size */
            avio_wl64(pb, number_of_samples);   /* fact chunk number of samples */
            avio_wl32(pb, 0);                   /* number of table entries for non-'data' chunks */

            /* write -1 in data chunk size */
            avio_seek(pb, wav->data - 4, SEEK_SET);
            avio_wl32(pb, -1);

            avio_seek(pb, file_size, SEEK_SET);
            avio_flush(pb);
        }
    }
    return 0;
}

#define OFFSET(x) offsetof(WAVMuxContext, x)
#define ENC AV_OPT_FLAG_ENCODING_PARAM
static const AVOption options[] = {
    { "write_bext", "Write BEXT chunk.", OFFSET(write_bext), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 1, ENC },
    { "rf64",       "Use RF64 header rather than RIFF for large files.",    OFFSET(rf64), AV_OPT_TYPE_INT,   { .i64 = RF64_NEVER  },-1, 1, ENC, "rf64" },
    { "auto",       "Write RF64 header if file grows large enough.",        0,            AV_OPT_TYPE_CONST, { .i64 = RF64_AUTO   }, 0, 0, ENC, "rf64" },
    { "always",     "Always write RF64 header regardless of file size.",    0,            AV_OPT_TYPE_CONST, { .i64 = RF64_ALWAYS }, 0, 0, ENC, "rf64" },
    { "never",      "Never write RF64 header regardless of file size.",     0,            AV_OPT_TYPE_CONST, { .i64 = RF64_NEVER  }, 0, 0, ENC, "rf64" },
    { NULL },
};

static const AVClass wav_muxer_class = {
    .class_name = "WAV muxer",
    .item_name  = av_default_item_name,
    .option     = options,
    .version    = LIBAVUTIL_VERSION_INT,
};

AVOutputFormat ff_wav_muxer = {
    .name              = "wav",
    .long_name         = NULL_IF_CONFIG_SMALL("WAV / WAVE (Waveform Audio)"),
    .mime_type         = "audio/x-wav",
    .extensions        = "wav",
    .priv_data_size    = sizeof(WAVMuxContext),
    .audio_codec       = AV_CODEC_ID_PCM_S16LE,
    .video_codec       = AV_CODEC_ID_NONE,
    .write_header      = wav_write_header,
    .write_packet      = wav_write_packet,
    .write_trailer     = wav_write_trailer,
    .flags             = AVFMT_TS_NONSTRICT,
    .codec_tag         = (const AVCodecTag* const []){ ff_codec_wav_tags, 0 },
    .priv_class        = &wav_muxer_class,
};
#endif /* CONFIG_WAV_MUXER */

#if CONFIG_W64_MUXER
#include "w64.h"

static void start_guid(AVIOContext *pb, const uint8_t *guid, int64_t *pos)
{
    *pos = avio_tell(pb);

    avio_write(pb, guid, 16);
    avio_wl64(pb, INT64_MAX);
}

static void end_guid(AVIOContext *pb, int64_t start)
{
    int64_t end, pos = avio_tell(pb);

    end = FFALIGN(pos, 8);
    ffio_fill(pb, 0, end - pos);
    avio_seek(pb, start + 16, SEEK_SET);
    avio_wl64(pb, end - start);
    avio_seek(pb, end, SEEK_SET);
}

static int w64_write_header(AVFormatContext *s)
{
    WAVMuxContext *wav = s->priv_data;
    AVIOContext *pb = s->pb;
    int64_t start;
    int ret;

    avio_write(pb, ff_w64_guid_riff, sizeof(ff_w64_guid_riff));
    avio_wl64(pb, -1);
    avio_write(pb, ff_w64_guid_wave, sizeof(ff_w64_guid_wave));
    start_guid(pb, ff_w64_guid_fmt, &start);
    if ((ret = ff_put_wav_header(pb, s->streams[0]->codec)) < 0) {
        av_log(s, AV_LOG_ERROR, "%s codec not supported\n",
               s->streams[0]->codec->codec ? s->streams[0]->codec->codec->name : "NONE");
        return ret;
    }
    end_guid(pb, start);

    if (s->streams[0]->codec->codec_tag != 0x01 /* hence for all other than PCM */
        && s->pb->seekable) {
        start_guid(pb, ff_w64_guid_fact, &wav->fact_pos);
        avio_wl64(pb, 0);
        end_guid(pb, wav->fact_pos);
    }

    start_guid(pb, ff_w64_guid_data, &wav->data);

    return 0;
}

static int w64_write_trailer(AVFormatContext *s)
{
    AVIOContext    *pb = s->pb;
    WAVMuxContext *wav = s->priv_data;
    int64_t file_size;

    if (pb->seekable) {
        end_guid(pb, wav->data);

        file_size = avio_tell(pb);
        avio_seek(pb, 16, SEEK_SET);
        avio_wl64(pb, file_size);

        if (s->streams[0]->codec->codec_tag != 0x01) {
            int64_t number_of_samples;

            number_of_samples = av_rescale(wav->maxpts - wav->minpts + wav->last_duration,
                                           s->streams[0]->codec->sample_rate * (int64_t)s->streams[0]->time_base.num,
                                           s->streams[0]->time_base.den);
            avio_seek(pb, wav->fact_pos + 24, SEEK_SET);
            avio_wl64(pb, number_of_samples);
        }

        avio_seek(pb, file_size, SEEK_SET);
        avio_flush(pb);
    }

    return 0;
}

AVOutputFormat ff_w64_muxer = {
    .name              = "w64",
    .long_name         = NULL_IF_CONFIG_SMALL("Sony Wave64"),
    .extensions        = "w64",
    .priv_data_size    = sizeof(WAVMuxContext),
    .audio_codec       = AV_CODEC_ID_PCM_S16LE,
    .video_codec       = AV_CODEC_ID_NONE,
    .write_header      = w64_write_header,
    .write_packet      = wav_write_packet,
    .write_trailer     = w64_write_trailer,
    .flags             = AVFMT_TS_NONSTRICT,
    .codec_tag         = (const AVCodecTag* const []){ ff_codec_wav_tags, 0 },
};
#endif /* CONFIG_W64_MUXER */