wav.c 11 KB
Newer Older
1
/*
2
 * WAV muxer and demuxer
3
 * Copyright (c) 2001, 2002 Fabrice Bellard
Fabrice Bellard's avatar
Fabrice Bellard committed
4
 *
Daniel Verkamp's avatar
Daniel Verkamp committed
5
 * Sony Wave64 demuxer
6
 * RF64 demuxer
Daniel Verkamp's avatar
Daniel Verkamp committed
7 8
 * Copyright (c) 2009 Daniel Verkamp
 *
9 10 11
 * This file is part of FFmpeg.
 *
 * FFmpeg is free software; you can redistribute it and/or
12 13
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
14
 * version 2.1 of the License, or (at your option) any later version.
Fabrice Bellard's avatar
Fabrice Bellard committed
15
 *
16
 * FFmpeg is distributed in the hope that it will be useful,
Fabrice Bellard's avatar
Fabrice Bellard committed
17
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
18 19
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.
Fabrice Bellard's avatar
Fabrice Bellard committed
20
 *
21
 * You should have received a copy of the GNU Lesser General Public
22
 * License along with FFmpeg; if not, write to the Free Software
23
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
Fabrice Bellard's avatar
Fabrice Bellard committed
24 25
 */
#include "avformat.h"
26
#include "pcm.h"
27
#include "riff.h"
28

Fabrice Bellard's avatar
Fabrice Bellard committed
29
typedef struct {
30 31
    int64_t data;
    int64_t data_end;
32 33 34
    int64_t minpts;
    int64_t maxpts;
    int last_duration;
Daniel Verkamp's avatar
Daniel Verkamp committed
35
    int w64;
Fabrice Bellard's avatar
Fabrice Bellard committed
36 37
} WAVContext;

38
#if CONFIG_WAV_MUXER
Fabrice Bellard's avatar
Fabrice Bellard committed
39 40
static int wav_write_header(AVFormatContext *s)
{
Fabrice Bellard's avatar
Fabrice Bellard committed
41
    WAVContext *wav = s->priv_data;
42
    ByteIOContext *pb = s->pb;
43
    int64_t fmt, fact;
Fabrice Bellard's avatar
Fabrice Bellard committed
44 45 46 47 48 49

    put_tag(pb, "RIFF");
    put_le32(pb, 0); /* file length */
    put_tag(pb, "WAVE");

    /* format header */
50 51
    fmt = ff_start_tag(pb, "fmt ");
    if (ff_put_wav_header(pb, s->streams[0]->codec) < 0) {
52
        av_log(s, AV_LOG_ERROR, "%s codec not supported in WAVE format\n",
53
               s->streams[0]->codec->codec ? s->streams[0]->codec->codec->name : "NONE");
54
        av_free(wav);
55 56
        return -1;
    }
57
    ff_end_tag(pb, fmt);
Fabrice Bellard's avatar
Fabrice Bellard committed
58

59 60
    if (s->streams[0]->codec->codec_tag != 0x01 /* hence for all other than PCM */
        && !url_is_streamed(s->pb)) {
61
        fact = ff_start_tag(pb, "fact");
62
        put_le32(pb, 0);
63
        ff_end_tag(pb, fact);
64 65
    }

66
    av_set_pts_info(s->streams[0], 64, 1, s->streams[0]->codec->sample_rate);
67 68
    wav->maxpts = wav->last_duration = 0;
    wav->minpts = INT64_MAX;
69

Fabrice Bellard's avatar
Fabrice Bellard committed
70
    /* data header */
71
    wav->data = ff_start_tag(pb, "data");
72

Fabrice Bellard's avatar
Fabrice Bellard committed
73 74 75 76 77
    put_flush_packet(pb);

    return 0;
}

78
static int wav_write_packet(AVFormatContext *s, AVPacket *pkt)
Fabrice Bellard's avatar
Fabrice Bellard committed
79
{
80 81
    ByteIOContext *pb  = s->pb;
    WAVContext    *wav = s->priv_data;
82
    put_buffer(pb, pkt->data, pkt->size);
83
    if(pkt->pts != AV_NOPTS_VALUE) {
84 85
        wav->minpts        = FFMIN(wav->minpts, pkt->pts);
        wav->maxpts        = FFMAX(wav->maxpts, pkt->pts);
86 87 88
        wav->last_duration = pkt->duration;
    } else
        av_log(s, AV_LOG_ERROR, "wav_write_packet: NOPTS\n");
Fabrice Bellard's avatar
Fabrice Bellard committed
89 90 91 92 93
    return 0;
}

static int wav_write_trailer(AVFormatContext *s)
{
94 95
    ByteIOContext *pb  = s->pb;
    WAVContext    *wav = s->priv_data;
96
    int64_t file_size;
Fabrice Bellard's avatar
Fabrice Bellard committed
97

98 99
    put_flush_packet(pb);

100
    if (!url_is_streamed(s->pb)) {
101
        ff_end_tag(pb, wav->data);
Fabrice Bellard's avatar
Fabrice Bellard committed
102 103 104 105

        /* update file size */
        file_size = url_ftell(pb);
        url_fseek(pb, 4, SEEK_SET);
106
        put_le32(pb, (uint32_t)(file_size - 8));
Fabrice Bellard's avatar
Fabrice Bellard committed
107 108 109
        url_fseek(pb, file_size, SEEK_SET);

        put_flush_packet(pb);
110 111 112 113 114 115 116 117 118 119 120 121

        if(s->streams[0]->codec->codec_tag != 0x01) {
            /* Update num_samps in fact chunk */
            int 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);
            url_fseek(pb, wav->data-12, SEEK_SET);
            put_le32(pb, number_of_samples);
            url_fseek(pb, file_size, SEEK_SET);
            put_flush_packet(pb);
        }
Fabrice Bellard's avatar
Fabrice Bellard committed
122 123 124
    }
    return 0;
}
125 126 127 128 129 130 131 132 133 134 135 136 137 138

AVOutputFormat wav_muxer = {
    "wav",
    NULL_IF_CONFIG_SMALL("WAV format"),
    "audio/x-wav",
    "wav",
    sizeof(WAVContext),
    CODEC_ID_PCM_S16LE,
    CODEC_ID_NONE,
    wav_write_header,
    wav_write_packet,
    wav_write_trailer,
    .codec_tag= (const AVCodecTag* const []){ff_codec_wav_tags, 0},
};
139
#endif /* CONFIG_WAV_MUXER */
Fabrice Bellard's avatar
Fabrice Bellard committed
140

141 142

#if CONFIG_WAV_DEMUXER
Fabrice Bellard's avatar
Fabrice Bellard committed
143
/* return the size of the found tag */
144
static int64_t find_tag(ByteIOContext *pb, uint32_t tag1)
Fabrice Bellard's avatar
Fabrice Bellard committed
145 146
{
    unsigned int tag;
147
    int64_t size;
Fabrice Bellard's avatar
Fabrice Bellard committed
148

149
    for (;;) {
Fabrice Bellard's avatar
Fabrice Bellard committed
150 151
        if (url_feof(pb))
            return -1;
152
        tag  = get_le32(pb);
Fabrice Bellard's avatar
Fabrice Bellard committed
153 154 155 156 157 158 159 160
        size = get_le32(pb);
        if (tag == tag1)
            break;
        url_fseek(pb, size, SEEK_CUR);
    }
    return size;
}

Fabrice Bellard's avatar
Fabrice Bellard committed
161 162 163 164 165
static int wav_probe(AVProbeData *p)
{
    /* check file header */
    if (p->buf_size <= 32)
        return 0;
166 167
    if (!memcmp(p->buf + 8, "WAVE", 4)) {
        if (!memcmp(p->buf, "RIFF", 4))
Daniel Verkamp's avatar
Daniel Verkamp committed
168 169 170 171 172 173
            /*
              Since ACT demuxer has standard WAV header at top of it's own,
              returning score is decreased to avoid probe conflict
              between ACT and WAV.
            */
            return AVPROBE_SCORE_MAX - 1;
174 175 176 177
        else if (!memcmp(p->buf,      "RF64", 4) &&
                 !memcmp(p->buf + 12, "ds64", 4))
            return AVPROBE_SCORE_MAX;
    }
Daniel Verkamp's avatar
Daniel Verkamp committed
178
    return 0;
Fabrice Bellard's avatar
Fabrice Bellard committed
179 180
}

Fabrice Bellard's avatar
Fabrice Bellard committed
181 182 183 184
/* wav input */
static int wav_read_header(AVFormatContext *s,
                           AVFormatParameters *ap)
{
185 186
    int64_t size, av_uninit(data_size);
    int rf64;
Fabrice Bellard's avatar
Fabrice Bellard committed
187
    unsigned int tag;
188
    ByteIOContext *pb = s->pb;
Fabrice Bellard's avatar
Fabrice Bellard committed
189
    AVStream *st;
190
    WAVContext *wav = s->priv_data;
Fabrice Bellard's avatar
Fabrice Bellard committed
191 192 193 194

    /* check RIFF header */
    tag = get_le32(pb);

195 196
    rf64 = tag == MKTAG('R', 'F', '6', '4');
    if (!rf64 && tag != MKTAG('R', 'I', 'F', 'F'))
Fabrice Bellard's avatar
Fabrice Bellard committed
197 198 199 200 201
        return -1;
    get_le32(pb); /* file size */
    tag = get_le32(pb);
    if (tag != MKTAG('W', 'A', 'V', 'E'))
        return -1;
202

203 204 205 206 207 208 209 210 211 212 213
    if (rf64) {
        if (get_le32(pb) != MKTAG('d', 's', '6', '4'))
            return -1;
        size = get_le32(pb);
        if (size < 16)
            return -1;
        get_le64(pb); /* RIFF size */
        data_size = get_le64(pb);
        url_fskip(pb, size - 16); /* skip rest of ds64 chunk */
    }

Fabrice Bellard's avatar
Fabrice Bellard committed
214 215 216 217
    /* parse fmt header */
    size = find_tag(pb, MKTAG('f', 'm', 't', ' '));
    if (size < 0)
        return -1;
Fabrice Bellard's avatar
Fabrice Bellard committed
218
    st = av_new_stream(s, 0);
Fabrice Bellard's avatar
Fabrice Bellard committed
219
    if (!st)
220
        return AVERROR(ENOMEM);
Fabrice Bellard's avatar
Fabrice Bellard committed
221

222
    ff_get_wav_header(pb, st->codec, size);
223
    st->need_parsing = AVSTREAM_PARSE_FULL;
224

225
    av_set_pts_info(st, 64, 1, st->codec->sample_rate);
226

227
    size = find_tag(pb, MKTAG('d', 'a', 't', 'a'));
228 229
    if (rf64)
        size = data_size;
230 231
    if (size < 0)
        return -1;
232 233 234
    if (!size) {
        wav->data_end = INT64_MAX;
    } else
Daniel Verkamp's avatar
Daniel Verkamp committed
235
        wav->data_end= url_ftell(pb) + size;
Fabrice Bellard's avatar
Fabrice Bellard committed
236 237 238
    return 0;
}

239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261
/** Find chunk with w64 GUID by skipping over other chunks
 * @return the size of the found chunk
 */
static int64_t find_guid(ByteIOContext *pb, const uint8_t guid1[16])
{
    uint8_t guid[16];
    int64_t size;

    while (!url_feof(pb)) {
        get_buffer(pb, guid, 16);
        size = get_le64(pb);
        if (size <= 24)
            return -1;
        if (!memcmp(guid, guid1, 16))
            return size;
        url_fskip(pb, FFALIGN(size, INT64_C(8)) - 24);
    }
    return -1;
}

static const uint8_t guid_data[16] = { 'd', 'a', 't', 'a',
    0xF3, 0xAC, 0xD3, 0x11, 0x8C, 0xD1, 0x00, 0xC0, 0x4F, 0x8E, 0xDB, 0x8A };

Fabrice Bellard's avatar
Fabrice Bellard committed
262 263 264 265 266
#define MAX_SIZE 4096

static int wav_read_packet(AVFormatContext *s,
                           AVPacket *pkt)
{
Daniel Verkamp's avatar
Daniel Verkamp committed
267 268
    int ret, size;
    int64_t left;
269
    AVStream *st;
270
    WAVContext *wav = s->priv_data;
Fabrice Bellard's avatar
Fabrice Bellard committed
271

272 273
    st = s->streams[0];

274 275 276
    left = wav->data_end - url_ftell(s->pb);
    if (left <= 0){
        if (CONFIG_W64_DEMUXER && wav->w64)
Daniel Verkamp's avatar
Daniel Verkamp committed
277
            left = find_guid(s->pb, guid_data) - 24;
278 279 280
        else
            left = find_tag(s->pb, MKTAG('d', 'a', 't', 'a'));
        if (left < 0)
281
            return AVERROR_EOF;
282
        wav->data_end= url_ftell(s->pb) + left;
283 284
    }

285
    size = MAX_SIZE;
286 287 288 289
    if (st->codec->block_align > 1) {
        if (size < st->codec->block_align)
            size = st->codec->block_align;
        size = (size / st->codec->block_align) * st->codec->block_align;
290
    }
291 292
    size = FFMIN(size, left);
    ret  = av_get_packet(s->pb, pkt, size);
293 294
    if (ret < 0)
        return ret;
Fabrice Bellard's avatar
Fabrice Bellard committed
295 296 297 298 299
    pkt->stream_index = 0;

    return ret;
}

300
static int wav_read_seek(AVFormatContext *s,
301
                         int stream_index, int64_t timestamp, int flags)
302 303 304 305
{
    AVStream *st;

    st = s->streams[0];
306
    switch (st->codec->codec_id) {
307 308 309
    case CODEC_ID_MP2:
    case CODEC_ID_MP3:
    case CODEC_ID_AC3:
310
    case CODEC_ID_DTS:
311 312 313 314 315
        /* use generic seeking with dynamically generated indexes */
        return -1;
    default:
        break;
    }
316
    return pcm_read_seek(s, stream_index, timestamp, flags);
317 318
}

319
AVInputFormat wav_demuxer = {
Fabrice Bellard's avatar
Fabrice Bellard committed
320
    "wav",
321
    NULL_IF_CONFIG_SMALL("WAV format"),
322
    sizeof(WAVContext),
Fabrice Bellard's avatar
Fabrice Bellard committed
323 324 325
    wav_probe,
    wav_read_header,
    wav_read_packet,
326
    NULL,
327
    wav_read_seek,
328
    .flags= AVFMT_GENERIC_INDEX,
329
    .codec_tag= (const AVCodecTag* const []){ff_codec_wav_tags, 0},
Fabrice Bellard's avatar
Fabrice Bellard committed
330
};
331
#endif /* CONFIG_WAV_DEMUXER */
332 333


Daniel Verkamp's avatar
Daniel Verkamp committed
334
#if CONFIG_W64_DEMUXER
335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404
static const uint8_t guid_riff[16] = { 'r', 'i', 'f', 'f',
    0x2E, 0x91, 0xCF, 0x11, 0xA5, 0xD6, 0x28, 0xDB, 0x04, 0xC1, 0x00, 0x00 };

static const uint8_t guid_wave[16] = { 'w', 'a', 'v', 'e',
    0xF3, 0xAC, 0xD3, 0x11, 0x8C, 0xD1, 0x00, 0xC0, 0x4F, 0x8E, 0xDB, 0x8A };

static const uint8_t guid_fmt [16] = { 'f', 'm', 't', ' ',
    0xF3, 0xAC, 0xD3, 0x11, 0x8C, 0xD1, 0x00, 0xC0, 0x4F, 0x8E, 0xDB, 0x8A };

static int w64_probe(AVProbeData *p)
{
    if (p->buf_size <= 40)
        return 0;
    if (!memcmp(p->buf,      guid_riff, 16) &&
        !memcmp(p->buf + 24, guid_wave, 16))
        return AVPROBE_SCORE_MAX;
    else
        return 0;
}

static int w64_read_header(AVFormatContext *s, AVFormatParameters *ap)
{
    int64_t size;
    ByteIOContext *pb  = s->pb;
    WAVContext    *wav = s->priv_data;
    AVStream *st;
    uint8_t guid[16];

    get_buffer(pb, guid, 16);
    if (memcmp(guid, guid_riff, 16))
        return -1;

    if (get_le64(pb) < 16 + 8 + 16 + 8 + 16 + 8) /* riff + wave + fmt + sizes */
        return -1;

    get_buffer(pb, guid, 16);
    if (memcmp(guid, guid_wave, 16)) {
        av_log(s, AV_LOG_ERROR, "could not find wave guid\n");
        return -1;
    }

    size = find_guid(pb, guid_fmt);
    if (size < 0) {
        av_log(s, AV_LOG_ERROR, "could not find fmt guid\n");
        return -1;
    }

    st = av_new_stream(s, 0);
    if (!st)
        return AVERROR(ENOMEM);

    /* subtract chunk header size - normal wav file doesn't count it */
    ff_get_wav_header(pb, st->codec, size - 24);
    url_fskip(pb, FFALIGN(size, INT64_C(8)) - size);

    st->need_parsing = AVSTREAM_PARSE_FULL;

    av_set_pts_info(st, 64, 1, st->codec->sample_rate);

    size = find_guid(pb, guid_data);
    if (size < 0) {
        av_log(s, AV_LOG_ERROR, "could not find data guid\n");
        return -1;
    }
    wav->data_end = url_ftell(pb) + size - 24;
    wav->w64      = 1;

    return 0;
}

Daniel Verkamp's avatar
Daniel Verkamp committed
405 406 407 408 409 410 411 412 413 414 415 416
AVInputFormat w64_demuxer = {
    "w64",
    NULL_IF_CONFIG_SMALL("Sony Wave64 format"),
    sizeof(WAVContext),
    w64_probe,
    w64_read_header,
    wav_read_packet,
    NULL,
    wav_read_seek,
    .flags = AVFMT_GENERIC_INDEX,
    .codec_tag = (const AVCodecTag* const []){ff_codec_wav_tags, 0},
};
417
#endif /* CONFIG_W64_DEMUXER */