3 * Copyright (c) 2001, 2002 Fabrice Bellard
7 * Copyright (c) 2009 Daniel Verkamp
9 * This file is part of Libav.
11 * Libav is free software; you can redistribute it and/or
12 * modify it under the terms of the GNU Lesser General Public
13 * License as published by the Free Software Foundation; either
14 * version 2.1 of the License, or (at your option) any later version.
16 * Libav is distributed in the hope that it will be useful,
17 * but WITHOUT ANY WARRANTY; without even the implied warranty of
18 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
19 * Lesser General Public License for more details.
21 * You should have received a copy of the GNU Lesser General Public
22 * License along with Libav; if not, write to the Free Software
23 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
28 #include "libavutil/avassert.h"
29 #include "libavutil/dict.h"
30 #include "libavutil/log.h"
31 #include "libavutil/mathematics.h"
32 #include "libavutil/opt.h"
35 #include "avio_internal.h"
41 typedef struct WAVDemuxContext {
46 #if CONFIG_WAV_DEMUXER
48 static int64_t next_tag(AVIOContext *pb, uint32_t *tag)
54 /* RIFF chunks are always on a even offset. */
55 static int64_t wav_seek_tag(AVIOContext *s, int64_t offset, int whence)
57 return avio_seek(s, offset + (offset & 1), whence);
60 /* return the size of the found tag */
61 static int64_t find_tag(AVIOContext *pb, uint32_t tag1)
69 size = next_tag(pb, &tag);
72 wav_seek_tag(pb, size, SEEK_CUR);
77 static int wav_probe(AVProbeData *p)
79 /* check file header */
80 if (p->buf_size <= 32)
82 if (!memcmp(p->buf + 8, "WAVE", 4)) {
83 if (!memcmp(p->buf, "RIFF", 4))
84 /* Since the ACT demuxer has a standard WAV header at the top of
85 * its own, the returned score is decreased to avoid a probe
86 * conflict between ACT and WAV. */
87 return AVPROBE_SCORE_MAX - 1;
88 else if (!memcmp(p->buf, "RF64", 4) &&
89 !memcmp(p->buf + 12, "ds64", 4))
90 return AVPROBE_SCORE_MAX;
95 static int wav_parse_fmt_tag(AVFormatContext *s, int64_t size, AVStream **st)
97 AVIOContext *pb = s->pb;
100 /* parse fmt header */
101 *st = avformat_new_stream(s, NULL);
103 return AVERROR(ENOMEM);
105 ret = ff_get_wav_header(pb, (*st)->codec, size);
108 (*st)->need_parsing = AVSTREAM_PARSE_FULL;
110 avpriv_set_pts_info(*st, 64, 1, (*st)->codec->sample_rate);
115 static inline int wav_parse_bext_string(AVFormatContext *s, const char *key,
121 av_assert0(length <= sizeof(temp));
122 if ((ret = avio_read(s->pb, temp, length)) < 0)
128 return av_dict_set(&s->metadata, key, temp, 0);
133 static int wav_parse_bext_tag(AVFormatContext *s, int64_t size)
135 char temp[131], *coding_history;
137 uint64_t time_reference;
138 int64_t umid_parts[8], umid_mask = 0;
140 if ((ret = wav_parse_bext_string(s, "description", 256)) < 0 ||
141 (ret = wav_parse_bext_string(s, "originator", 32)) < 0 ||
142 (ret = wav_parse_bext_string(s, "originator_reference", 32)) < 0 ||
143 (ret = wav_parse_bext_string(s, "origination_date", 10)) < 0 ||
144 (ret = wav_parse_bext_string(s, "origination_time", 8)) < 0)
147 time_reference = avio_rl64(s->pb);
148 snprintf(temp, sizeof(temp), "%"PRIu64, time_reference);
149 if ((ret = av_dict_set(&s->metadata, "time_reference", temp, 0)) < 0)
152 /* check if version is >= 1, in which case an UMID may be present */
153 if (avio_rl16(s->pb) >= 1) {
154 for (x = 0; x < 8; x++)
155 umid_mask |= umid_parts[x] = avio_rb64(s->pb);
158 /* the string formatting below is per SMPTE 330M-2004 Annex C */
159 if (umid_parts[4] == 0 && umid_parts[5] == 0 &&
160 umid_parts[6] == 0 && umid_parts[7] == 0) {
162 snprintf(temp, sizeof(temp),
163 "0x%016"PRIX64"%016"PRIX64"%016"PRIX64"%016"PRIX64,
164 umid_parts[0], umid_parts[1],
165 umid_parts[2], umid_parts[3]);
168 snprintf(temp, sizeof(temp),
169 "0x%016"PRIX64"%016"PRIX64"%016"PRIX64"%016"PRIX64
170 "0x%016"PRIX64"%016"PRIX64"%016"PRIX64"%016"PRIX64,
171 umid_parts[0], umid_parts[1],
172 umid_parts[2], umid_parts[3],
173 umid_parts[4], umid_parts[5],
174 umid_parts[6], umid_parts[7]);
177 if ((ret = av_dict_set(&s->metadata, "umid", temp, 0)) < 0)
181 avio_skip(s->pb, 190);
183 avio_skip(s->pb, 254);
186 /* CodingHistory present */
189 if (!(coding_history = av_malloc(size + 1)))
190 return AVERROR(ENOMEM);
192 if ((ret = avio_read(s->pb, coding_history, size)) < 0)
195 coding_history[size] = 0;
196 if ((ret = av_dict_set(&s->metadata, "coding_history", coding_history,
197 AV_DICT_DONT_STRDUP_VAL)) < 0)
204 static const AVMetadataConv wav_metadata_conv[] = {
205 { "description", "comment" },
206 { "originator", "encoded_by" },
207 { "origination_date", "date" },
208 { "origination_time", "creation_time" },
213 static int wav_read_header(AVFormatContext *s)
215 int64_t size, av_uninit(data_size);
216 int64_t sample_count = 0;
219 AVIOContext *pb = s->pb;
221 WAVDemuxContext *wav = s->priv_data;
222 int ret, got_fmt = 0;
223 int64_t next_tag_ofs, data_ofs = -1;
225 /* check RIFF header */
228 rf64 = tag == MKTAG('R', 'F', '6', '4');
229 if (!rf64 && tag != MKTAG('R', 'I', 'F', 'F'))
230 return AVERROR_INVALIDDATA;
231 avio_rl32(pb); /* file size */
233 if (tag != MKTAG('W', 'A', 'V', 'E'))
234 return AVERROR_INVALIDDATA;
237 if (avio_rl32(pb) != MKTAG('d', 's', '6', '4'))
238 return AVERROR_INVALIDDATA;
239 size = avio_rl32(pb);
241 return AVERROR_INVALIDDATA;
242 avio_rl64(pb); /* RIFF size */
244 data_size = avio_rl64(pb);
245 sample_count = avio_rl64(pb);
247 if (data_size < 0 || sample_count < 0) {
248 av_log(s, AV_LOG_ERROR, "negative data_size and/or sample_count in "
249 "ds64: data_size = %"PRId64", sample_count = %"PRId64"\n",
250 data_size, sample_count);
251 return AVERROR_INVALIDDATA;
253 avio_skip(pb, size - 16); /* skip rest of ds64 chunk */
257 size = next_tag(pb, &tag);
258 next_tag_ofs = avio_tell(pb) + size;
264 case MKTAG('f', 'm', 't', ' '):
265 /* only parse the first 'fmt ' tag found */
266 if (!got_fmt && (ret = wav_parse_fmt_tag(s, size, &st) < 0)) {
269 av_log(s, AV_LOG_WARNING, "found more than one 'fmt ' tag\n");
273 case MKTAG('d', 'a', 't', 'a'):
275 av_log(s, AV_LOG_ERROR,
276 "found no 'fmt ' tag before the 'data' tag\n");
277 return AVERROR_INVALIDDATA;
281 next_tag_ofs = wav->data_end = avio_tell(pb) + data_size;
284 next_tag_ofs = wav->data_end = size ? next_tag_ofs : INT64_MAX;
287 data_ofs = avio_tell(pb);
289 /* don't look for footer metadata if we can't seek or if we don't
290 * know where the data tag ends
292 if (!pb->seekable || (!rf64 && !size))
295 case MKTAG('f', 'a', 'c', 't'):
297 sample_count = avio_rl32(pb);
299 case MKTAG('b', 'e', 'x', 't'):
300 if ((ret = wav_parse_bext_tag(s, size)) < 0)
303 case MKTAG('L', 'I', 'S', 'T'):
305 av_log(s, AV_LOG_ERROR, "too short LIST");
306 return AVERROR_INVALIDDATA;
308 switch (avio_rl32(pb)) {
309 case MKTAG('I', 'N', 'F', 'O'):
310 if ((ret = ff_read_riff_info(s, size - 4)) < 0)
316 /* seek to next tag unless we know that we'll run into EOF */
317 if ((avio_size(pb) > 0 && next_tag_ofs >= avio_size(pb)) ||
318 wav_seek_tag(pb, next_tag_ofs, SEEK_SET) < 0) {
325 av_log(s, AV_LOG_ERROR, "no 'data' tag found\n");
326 return AVERROR_INVALIDDATA;
329 avio_seek(pb, data_ofs, SEEK_SET);
331 if (!sample_count && st->codec->channels &&
332 av_get_bits_per_sample(st->codec->codec_id))
333 sample_count = (data_size << 3) /
334 (st->codec->channels *
335 (uint64_t)av_get_bits_per_sample(st->codec->codec_id));
337 st->duration = sample_count;
339 ff_metadata_conv_ctx(s, NULL, wav_metadata_conv);
340 ff_metadata_conv_ctx(s, NULL, ff_riff_info_conv);
346 * Find chunk with w64 GUID by skipping over other chunks.
347 * @return the size of the found chunk
349 static int64_t find_guid(AVIOContext *pb, const uint8_t guid1[16])
354 while (!pb->eof_reached) {
355 avio_read(pb, guid, 16);
356 size = avio_rl64(pb);
359 if (!memcmp(guid, guid1, 16))
361 avio_skip(pb, FFALIGN(size, INT64_C(8)) - 24);
366 static const uint8_t guid_data[16] = {
368 0xF3, 0xAC, 0xD3, 0x11,0x8C, 0xD1, 0x00, 0xC0, 0x4F, 0x8E, 0xDB, 0x8A
371 #define MAX_SIZE 4096
373 static int wav_read_packet(AVFormatContext *s, AVPacket *pkt)
378 WAVDemuxContext *wav = s->priv_data;
382 left = wav->data_end - avio_tell(s->pb);
384 if (CONFIG_W64_DEMUXER && wav->w64)
385 left = find_guid(s->pb, guid_data) - 24;
387 left = find_tag(s->pb, MKTAG('d', 'a', 't', 'a'));
390 wav->data_end = avio_tell(s->pb) + left;
394 if (st->codec->block_align > 1) {
395 if (size < st->codec->block_align)
396 size = st->codec->block_align;
397 size = (size / st->codec->block_align) * st->codec->block_align;
399 size = FFMIN(size, left);
400 ret = av_get_packet(s->pb, pkt, size);
403 pkt->stream_index = 0;
408 static int wav_read_seek(AVFormatContext *s,
409 int stream_index, int64_t timestamp, int flags)
414 switch (st->codec->codec_id) {
415 case AV_CODEC_ID_MP2:
416 case AV_CODEC_ID_MP3:
417 case AV_CODEC_ID_AC3:
418 case AV_CODEC_ID_DTS:
419 /* use generic seeking with dynamically generated indexes */
424 return ff_pcm_read_seek(s, stream_index, timestamp, flags);
427 AVInputFormat ff_wav_demuxer = {
429 .long_name = NULL_IF_CONFIG_SMALL("WAV / WAVE (Waveform Audio)"),
430 .priv_data_size = sizeof(WAVDemuxContext),
431 .read_probe = wav_probe,
432 .read_header = wav_read_header,
433 .read_packet = wav_read_packet,
434 .read_seek = wav_read_seek,
435 .flags = AVFMT_GENERIC_INDEX,
436 .codec_tag = (const AVCodecTag * const []) { ff_codec_wav_tags, 0 },
438 #endif /* CONFIG_WAV_DEMUXER */
440 #if CONFIG_W64_DEMUXER
441 static const uint8_t guid_riff[16] = {
443 0x2E, 0x91, 0xCF, 0x11,0xA5, 0xD6, 0x28, 0xDB, 0x04, 0xC1, 0x00, 0x00
446 static const uint8_t guid_wave[16] = {
448 0xF3, 0xAC, 0xD3, 0x11,0x8C, 0xD1, 0x00, 0xC0, 0x4F, 0x8E, 0xDB, 0x8A
451 static const uint8_t guid_fmt[16] = {
453 0xF3, 0xAC, 0xD3, 0x11,0x8C, 0xD1, 0x00, 0xC0, 0x4F, 0x8E, 0xDB, 0x8A
456 static int w64_probe(AVProbeData *p)
458 if (p->buf_size <= 40)
460 if (!memcmp(p->buf, guid_riff, 16) &&
461 !memcmp(p->buf + 24, guid_wave, 16))
462 return AVPROBE_SCORE_MAX;
467 static int w64_read_header(AVFormatContext *s)
470 AVIOContext *pb = s->pb;
471 WAVDemuxContext *wav = s->priv_data;
476 avio_read(pb, guid, 16);
477 if (memcmp(guid, guid_riff, 16))
478 return AVERROR_INVALIDDATA;
480 /* riff + wave + fmt + sizes */
481 if (avio_rl64(pb) < 16 + 8 + 16 + 8 + 16 + 8)
482 return AVERROR_INVALIDDATA;
484 avio_read(pb, guid, 16);
485 if (memcmp(guid, guid_wave, 16)) {
486 av_log(s, AV_LOG_ERROR, "could not find wave guid\n");
487 return AVERROR_INVALIDDATA;
490 size = find_guid(pb, guid_fmt);
492 av_log(s, AV_LOG_ERROR, "could not find fmt guid\n");
493 return AVERROR_INVALIDDATA;
496 st = avformat_new_stream(s, NULL);
498 return AVERROR(ENOMEM);
500 /* subtract chunk header size - normal wav file doesn't count it */
501 ret = ff_get_wav_header(pb, st->codec, size - 24);
504 avio_skip(pb, FFALIGN(size, INT64_C(8)) - size);
506 st->need_parsing = AVSTREAM_PARSE_FULL;
508 avpriv_set_pts_info(st, 64, 1, st->codec->sample_rate);
510 size = find_guid(pb, guid_data);
512 av_log(s, AV_LOG_ERROR, "could not find data guid\n");
513 return AVERROR_INVALIDDATA;
515 wav->data_end = avio_tell(pb) + size - 24;
521 AVInputFormat ff_w64_demuxer = {
523 .long_name = NULL_IF_CONFIG_SMALL("Sony Wave64"),
524 .priv_data_size = sizeof(WAVDemuxContext),
525 .read_probe = w64_probe,
526 .read_header = w64_read_header,
527 .read_packet = wav_read_packet,
528 .read_seek = wav_read_seek,
529 .flags = AVFMT_GENERIC_INDEX,
530 .codec_tag = (const AVCodecTag * const []) { ff_codec_wav_tags, 0 },
532 #endif /* CONFIG_W64_DEMUXER */