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
26 #include "libavutil/avassert.h"
27 #include "libavutil/dict.h"
28 #include "libavutil/log.h"
29 #include "libavutil/mathematics.h"
30 #include "libavutil/opt.h"
33 #include "avio_internal.h"
39 typedef struct WAVDemuxContext {
44 #if CONFIG_WAV_DEMUXER
46 static int64_t next_tag(AVIOContext *pb, uint32_t *tag)
52 /* RIFF chunks are always on a even offset. */
53 static int64_t wav_seek_tag(AVIOContext *s, int64_t offset, int whence)
55 return avio_seek(s, offset + (offset & 1), whence);
58 /* return the size of the found tag */
59 static int64_t find_tag(AVIOContext *pb, uint32_t tag1)
67 size = next_tag(pb, &tag);
70 wav_seek_tag(pb, size, SEEK_CUR);
75 static int wav_probe(AVProbeData *p)
77 /* check file header */
78 if (p->buf_size <= 32)
80 if (!memcmp(p->buf + 8, "WAVE", 4)) {
81 if (!memcmp(p->buf, "RIFF", 4))
82 /* Since the ACT demuxer has a standard WAV header at the top of
83 * its own, the returned score is decreased to avoid a probe
84 * conflict between ACT and WAV. */
85 return AVPROBE_SCORE_MAX - 1;
86 else if (!memcmp(p->buf, "RF64", 4) &&
87 !memcmp(p->buf + 12, "ds64", 4))
88 return AVPROBE_SCORE_MAX;
93 static int wav_parse_fmt_tag(AVFormatContext *s, int64_t size, AVStream **st)
95 AVIOContext *pb = s->pb;
98 /* parse fmt header */
99 *st = avformat_new_stream(s, NULL);
101 return AVERROR(ENOMEM);
103 ret = ff_get_wav_header(pb, (*st)->codec, size);
106 (*st)->need_parsing = AVSTREAM_PARSE_FULL;
108 avpriv_set_pts_info(*st, 64, 1, (*st)->codec->sample_rate);
113 static inline int wav_parse_bext_string(AVFormatContext *s, const char *key,
119 av_assert0(length <= sizeof(temp));
120 if ((ret = avio_read(s->pb, temp, length)) < 0)
126 return av_dict_set(&s->metadata, key, temp, 0);
131 static int wav_parse_bext_tag(AVFormatContext *s, int64_t size)
133 char temp[131], *coding_history;
135 uint64_t time_reference;
136 int64_t umid_parts[8], umid_mask = 0;
138 if ((ret = wav_parse_bext_string(s, "description", 256)) < 0 ||
139 (ret = wav_parse_bext_string(s, "originator", 32)) < 0 ||
140 (ret = wav_parse_bext_string(s, "originator_reference", 32)) < 0 ||
141 (ret = wav_parse_bext_string(s, "origination_date", 10)) < 0 ||
142 (ret = wav_parse_bext_string(s, "origination_time", 8)) < 0)
145 time_reference = avio_rl64(s->pb);
146 snprintf(temp, sizeof(temp), "%"PRIu64, time_reference);
147 if ((ret = av_dict_set(&s->metadata, "time_reference", temp, 0)) < 0)
150 /* check if version is >= 1, in which case an UMID may be present */
151 if (avio_rl16(s->pb) >= 1) {
152 for (x = 0; x < 8; x++)
153 umid_mask |= umid_parts[x] = avio_rb64(s->pb);
156 /* the string formatting below is per SMPTE 330M-2004 Annex C */
157 if (umid_parts[4] == 0 && umid_parts[5] == 0 &&
158 umid_parts[6] == 0 && umid_parts[7] == 0) {
160 snprintf(temp, sizeof(temp),
161 "0x%016"PRIX64"%016"PRIX64"%016"PRIX64"%016"PRIX64,
162 umid_parts[0], umid_parts[1],
163 umid_parts[2], umid_parts[3]);
166 snprintf(temp, sizeof(temp),
167 "0x%016"PRIX64"%016"PRIX64"%016"PRIX64"%016"PRIX64
168 "0x%016"PRIX64"%016"PRIX64"%016"PRIX64"%016"PRIX64,
169 umid_parts[0], umid_parts[1],
170 umid_parts[2], umid_parts[3],
171 umid_parts[4], umid_parts[5],
172 umid_parts[6], umid_parts[7]);
175 if ((ret = av_dict_set(&s->metadata, "umid", temp, 0)) < 0)
179 avio_skip(s->pb, 190);
181 avio_skip(s->pb, 254);
184 /* CodingHistory present */
187 if (!(coding_history = av_malloc(size + 1)))
188 return AVERROR(ENOMEM);
190 if ((ret = avio_read(s->pb, coding_history, size)) < 0)
193 coding_history[size] = 0;
194 if ((ret = av_dict_set(&s->metadata, "coding_history", coding_history,
195 AV_DICT_DONT_STRDUP_VAL)) < 0)
202 static const AVMetadataConv wav_metadata_conv[] = {
203 { "description", "comment" },
204 { "originator", "encoded_by" },
205 { "origination_date", "date" },
206 { "origination_time", "creation_time" },
211 static int wav_read_header(AVFormatContext *s)
213 int64_t size, av_uninit(data_size);
214 int64_t sample_count = 0;
217 AVIOContext *pb = s->pb;
219 WAVDemuxContext *wav = s->priv_data;
220 int ret, got_fmt = 0;
221 int64_t next_tag_ofs, data_ofs = -1;
223 /* check RIFF header */
226 rf64 = tag == MKTAG('R', 'F', '6', '4');
227 if (!rf64 && tag != MKTAG('R', 'I', 'F', 'F'))
228 return AVERROR_INVALIDDATA;
229 avio_rl32(pb); /* file size */
231 if (tag != MKTAG('W', 'A', 'V', 'E'))
232 return AVERROR_INVALIDDATA;
235 if (avio_rl32(pb) != MKTAG('d', 's', '6', '4'))
236 return AVERROR_INVALIDDATA;
237 size = avio_rl32(pb);
239 return AVERROR_INVALIDDATA;
240 avio_rl64(pb); /* RIFF size */
242 data_size = avio_rl64(pb);
243 sample_count = avio_rl64(pb);
245 if (data_size < 0 || sample_count < 0) {
246 av_log(s, AV_LOG_ERROR, "negative data_size and/or sample_count in "
247 "ds64: data_size = %"PRId64", sample_count = %"PRId64"\n",
248 data_size, sample_count);
249 return AVERROR_INVALIDDATA;
251 avio_skip(pb, size - 16); /* skip rest of ds64 chunk */
255 size = next_tag(pb, &tag);
256 next_tag_ofs = avio_tell(pb) + size;
262 case MKTAG('f', 'm', 't', ' '):
263 /* only parse the first 'fmt ' tag found */
264 if (!got_fmt && (ret = wav_parse_fmt_tag(s, size, &st) < 0)) {
267 av_log(s, AV_LOG_WARNING, "found more than one 'fmt ' tag\n");
271 case MKTAG('d', 'a', 't', 'a'):
273 av_log(s, AV_LOG_ERROR,
274 "found no 'fmt ' tag before the 'data' tag\n");
275 return AVERROR_INVALIDDATA;
279 next_tag_ofs = wav->data_end = avio_tell(pb) + data_size;
282 next_tag_ofs = wav->data_end = size ? next_tag_ofs : INT64_MAX;
285 data_ofs = avio_tell(pb);
287 /* don't look for footer metadata if we can't seek or if we don't
288 * know where the data tag ends
290 if (!pb->seekable || (!rf64 && !size))
293 case MKTAG('f', 'a', 'c', 't'):
295 sample_count = avio_rl32(pb);
297 case MKTAG('b', 'e', 'x', 't'):
298 if ((ret = wav_parse_bext_tag(s, size)) < 0)
301 case MKTAG('L', 'I', 'S', 'T'):
303 av_log(s, AV_LOG_ERROR, "too short LIST");
304 return AVERROR_INVALIDDATA;
306 switch (avio_rl32(pb)) {
307 case MKTAG('I', 'N', 'F', 'O'):
308 if ((ret = ff_read_riff_info(s, size - 4)) < 0)
314 /* seek to next tag unless we know that we'll run into EOF */
315 if ((avio_size(pb) > 0 && next_tag_ofs >= avio_size(pb)) ||
316 wav_seek_tag(pb, next_tag_ofs, SEEK_SET) < 0) {
323 av_log(s, AV_LOG_ERROR, "no 'data' tag found\n");
324 return AVERROR_INVALIDDATA;
327 avio_seek(pb, data_ofs, SEEK_SET);
329 if (!sample_count && st->codec->channels &&
330 av_get_bits_per_sample(st->codec->codec_id))
331 sample_count = (data_size << 3) /
332 (st->codec->channels *
333 (uint64_t)av_get_bits_per_sample(st->codec->codec_id));
335 st->duration = sample_count;
337 ff_metadata_conv_ctx(s, NULL, wav_metadata_conv);
338 ff_metadata_conv_ctx(s, NULL, ff_riff_info_conv);
344 * Find chunk with w64 GUID by skipping over other chunks.
345 * @return the size of the found chunk
347 static int64_t find_guid(AVIOContext *pb, const uint8_t guid1[16])
352 while (!pb->eof_reached) {
353 avio_read(pb, guid, 16);
354 size = avio_rl64(pb);
357 if (!memcmp(guid, guid1, 16))
359 avio_skip(pb, FFALIGN(size, INT64_C(8)) - 24);
364 static const uint8_t guid_data[16] = {
366 0xF3, 0xAC, 0xD3, 0x11,0x8C, 0xD1, 0x00, 0xC0, 0x4F, 0x8E, 0xDB, 0x8A
369 #define MAX_SIZE 4096
371 static int wav_read_packet(AVFormatContext *s, AVPacket *pkt)
376 WAVDemuxContext *wav = s->priv_data;
380 left = wav->data_end - avio_tell(s->pb);
382 if (CONFIG_W64_DEMUXER && wav->w64)
383 left = find_guid(s->pb, guid_data) - 24;
385 left = find_tag(s->pb, MKTAG('d', 'a', 't', 'a'));
388 wav->data_end = avio_tell(s->pb) + left;
392 if (st->codec->block_align > 1) {
393 if (size < st->codec->block_align)
394 size = st->codec->block_align;
395 size = (size / st->codec->block_align) * st->codec->block_align;
397 size = FFMIN(size, left);
398 ret = av_get_packet(s->pb, pkt, size);
401 pkt->stream_index = 0;
406 static int wav_read_seek(AVFormatContext *s,
407 int stream_index, int64_t timestamp, int flags)
412 switch (st->codec->codec_id) {
413 case AV_CODEC_ID_MP2:
414 case AV_CODEC_ID_MP3:
415 case AV_CODEC_ID_AC3:
416 case AV_CODEC_ID_DTS:
417 /* use generic seeking with dynamically generated indexes */
422 return ff_pcm_read_seek(s, stream_index, timestamp, flags);
425 AVInputFormat ff_wav_demuxer = {
427 .long_name = NULL_IF_CONFIG_SMALL("WAV / WAVE (Waveform Audio)"),
428 .priv_data_size = sizeof(WAVDemuxContext),
429 .read_probe = wav_probe,
430 .read_header = wav_read_header,
431 .read_packet = wav_read_packet,
432 .read_seek = wav_read_seek,
433 .flags = AVFMT_GENERIC_INDEX,
434 .codec_tag = (const AVCodecTag * const []) { ff_codec_wav_tags, 0 },
436 #endif /* CONFIG_WAV_DEMUXER */
438 #if CONFIG_W64_DEMUXER
439 static const uint8_t guid_riff[16] = {
441 0x2E, 0x91, 0xCF, 0x11,0xA5, 0xD6, 0x28, 0xDB, 0x04, 0xC1, 0x00, 0x00
444 static const uint8_t guid_wave[16] = {
446 0xF3, 0xAC, 0xD3, 0x11,0x8C, 0xD1, 0x00, 0xC0, 0x4F, 0x8E, 0xDB, 0x8A
449 static const uint8_t guid_fmt[16] = {
451 0xF3, 0xAC, 0xD3, 0x11,0x8C, 0xD1, 0x00, 0xC0, 0x4F, 0x8E, 0xDB, 0x8A
454 static int w64_probe(AVProbeData *p)
456 if (p->buf_size <= 40)
458 if (!memcmp(p->buf, guid_riff, 16) &&
459 !memcmp(p->buf + 24, guid_wave, 16))
460 return AVPROBE_SCORE_MAX;
465 static int w64_read_header(AVFormatContext *s)
468 AVIOContext *pb = s->pb;
469 WAVDemuxContext *wav = s->priv_data;
474 avio_read(pb, guid, 16);
475 if (memcmp(guid, guid_riff, 16))
476 return AVERROR_INVALIDDATA;
478 /* riff + wave + fmt + sizes */
479 if (avio_rl64(pb) < 16 + 8 + 16 + 8 + 16 + 8)
480 return AVERROR_INVALIDDATA;
482 avio_read(pb, guid, 16);
483 if (memcmp(guid, guid_wave, 16)) {
484 av_log(s, AV_LOG_ERROR, "could not find wave guid\n");
485 return AVERROR_INVALIDDATA;
488 size = find_guid(pb, guid_fmt);
490 av_log(s, AV_LOG_ERROR, "could not find fmt guid\n");
491 return AVERROR_INVALIDDATA;
494 st = avformat_new_stream(s, NULL);
496 return AVERROR(ENOMEM);
498 /* subtract chunk header size - normal wav file doesn't count it */
499 ret = ff_get_wav_header(pb, st->codec, size - 24);
502 avio_skip(pb, FFALIGN(size, INT64_C(8)) - size);
504 st->need_parsing = AVSTREAM_PARSE_FULL;
506 avpriv_set_pts_info(st, 64, 1, st->codec->sample_rate);
508 size = find_guid(pb, guid_data);
510 av_log(s, AV_LOG_ERROR, "could not find data guid\n");
511 return AVERROR_INVALIDDATA;
513 wav->data_end = avio_tell(pb) + size - 24;
519 AVInputFormat ff_w64_demuxer = {
521 .long_name = NULL_IF_CONFIG_SMALL("Sony Wave64"),
522 .priv_data_size = sizeof(WAVDemuxContext),
523 .read_probe = w64_probe,
524 .read_header = w64_read_header,
525 .read_packet = wav_read_packet,
526 .read_seek = wav_read_seek,
527 .flags = AVFMT_GENERIC_INDEX,
528 .codec_tag = (const AVCodecTag * const []) { ff_codec_wav_tags, 0 },
530 #endif /* CONFIG_W64_DEMUXER */