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 {
45 #if CONFIG_WAV_DEMUXER
47 static int64_t next_tag(AVIOContext *pb, uint32_t *tag)
53 /* return the size of the found tag */
54 static int64_t find_tag(AVIOContext *pb, uint32_t tag1)
62 size = next_tag(pb, &tag);
70 static int wav_probe(AVProbeData *p)
72 /* check file header */
73 if (p->buf_size <= 32)
75 if (!memcmp(p->buf + 8, "WAVE", 4)) {
76 if (!memcmp(p->buf, "RIFF", 4))
78 Since ACT demuxer has standard WAV header at top of it's own,
79 returning score is decreased to avoid probe conflict
82 return AVPROBE_SCORE_MAX - 1;
83 else if (!memcmp(p->buf, "RF64", 4) &&
84 !memcmp(p->buf + 12, "ds64", 4))
85 return AVPROBE_SCORE_MAX;
90 static int wav_parse_fmt_tag(AVFormatContext *s, int64_t size, AVStream **st)
92 AVIOContext *pb = s->pb;
95 /* parse fmt header */
96 *st = avformat_new_stream(s, NULL);
98 return AVERROR(ENOMEM);
100 ret = ff_get_wav_header(pb, (*st)->codec, size);
103 (*st)->need_parsing = AVSTREAM_PARSE_FULL;
105 avpriv_set_pts_info(*st, 64, 1, (*st)->codec->sample_rate);
110 static inline int wav_parse_bext_string(AVFormatContext *s, const char *key,
116 av_assert0(length <= sizeof(temp));
117 if ((ret = avio_read(s->pb, temp, length)) < 0)
123 return av_dict_set(&s->metadata, key, temp, 0);
128 static int wav_parse_bext_tag(AVFormatContext *s, int64_t size)
130 char temp[131], *coding_history;
132 uint64_t time_reference;
133 int64_t umid_parts[8], umid_mask = 0;
135 if ((ret = wav_parse_bext_string(s, "description", 256)) < 0 ||
136 (ret = wav_parse_bext_string(s, "originator", 32)) < 0 ||
137 (ret = wav_parse_bext_string(s, "originator_reference", 32)) < 0 ||
138 (ret = wav_parse_bext_string(s, "origination_date", 10)) < 0 ||
139 (ret = wav_parse_bext_string(s, "origination_time", 8)) < 0)
142 time_reference = avio_rl64(s->pb);
143 snprintf(temp, sizeof(temp), "%"PRIu64, time_reference);
144 if ((ret = av_dict_set(&s->metadata, "time_reference", temp, 0)) < 0)
147 /* check if version is >= 1, in which case an UMID may be present */
148 if (avio_rl16(s->pb) >= 1) {
149 for (x = 0; x < 8; x++)
150 umid_mask |= umid_parts[x] = avio_rb64(s->pb);
153 /* the string formatting below is per SMPTE 330M-2004 Annex C */
154 if (umid_parts[4] == 0 && umid_parts[5] == 0 && umid_parts[6] == 0 && umid_parts[7] == 0) {
156 snprintf(temp, sizeof(temp), "0x%016"PRIX64"%016"PRIX64"%016"PRIX64"%016"PRIX64,
157 umid_parts[0], umid_parts[1], umid_parts[2], umid_parts[3]);
160 snprintf(temp, sizeof(temp), "0x%016"PRIX64"%016"PRIX64"%016"PRIX64"%016"PRIX64
161 "0x%016"PRIX64"%016"PRIX64"%016"PRIX64"%016"PRIX64,
162 umid_parts[0], umid_parts[1], umid_parts[2], umid_parts[3],
163 umid_parts[4], umid_parts[5], umid_parts[6], umid_parts[7]);
166 if ((ret = av_dict_set(&s->metadata, "umid", temp, 0)) < 0)
170 avio_skip(s->pb, 190);
172 avio_skip(s->pb, 254);
175 /* CodingHistory present */
178 if (!(coding_history = av_malloc(size+1)))
179 return AVERROR(ENOMEM);
181 if ((ret = avio_read(s->pb, coding_history, size)) < 0)
184 coding_history[size] = 0;
185 if ((ret = av_dict_set(&s->metadata, "coding_history", coding_history,
186 AV_DICT_DONT_STRDUP_VAL)) < 0)
193 static const AVMetadataConv wav_metadata_conv[] = {
194 {"description", "comment" },
195 {"originator", "encoded_by" },
196 {"origination_date", "date" },
197 {"origination_time", "creation_time"},
202 static int wav_read_header(AVFormatContext *s)
204 int64_t size, av_uninit(data_size);
205 int64_t sample_count=0;
208 AVIOContext *pb = s->pb;
210 WAVDemuxContext *wav = s->priv_data;
211 int ret, got_fmt = 0;
212 int64_t next_tag_ofs, data_ofs = -1;
214 /* check RIFF header */
217 rf64 = tag == MKTAG('R', 'F', '6', '4');
218 if (!rf64 && tag != MKTAG('R', 'I', 'F', 'F'))
220 avio_rl32(pb); /* file size */
222 if (tag != MKTAG('W', 'A', 'V', 'E'))
226 if (avio_rl32(pb) != MKTAG('d', 's', '6', '4'))
228 size = avio_rl32(pb);
231 avio_rl64(pb); /* RIFF size */
232 data_size = avio_rl64(pb);
233 sample_count = avio_rl64(pb);
234 if (data_size < 0 || sample_count < 0) {
235 av_log(s, AV_LOG_ERROR, "negative data_size and/or sample_count in "
236 "ds64: data_size = %"PRId64", sample_count = %"PRId64"\n",
237 data_size, sample_count);
238 return AVERROR_INVALIDDATA;
240 avio_skip(pb, size - 16); /* skip rest of ds64 chunk */
244 size = next_tag(pb, &tag);
245 next_tag_ofs = avio_tell(pb) + size;
251 case MKTAG('f', 'm', 't', ' '):
252 /* only parse the first 'fmt ' tag found */
253 if (!got_fmt && (ret = wav_parse_fmt_tag(s, size, &st) < 0)) {
256 av_log(s, AV_LOG_WARNING, "found more than one 'fmt ' tag\n");
260 case MKTAG('d', 'a', 't', 'a'):
262 av_log(s, AV_LOG_ERROR, "found no 'fmt ' tag before the 'data' tag\n");
263 return AVERROR_INVALIDDATA;
267 next_tag_ofs = wav->data_end = avio_tell(pb) + data_size;
270 next_tag_ofs = wav->data_end = size ? next_tag_ofs : INT64_MAX;
273 data_ofs = avio_tell(pb);
275 /* don't look for footer metadata if we can't seek or if we don't
276 * know where the data tag ends
278 if (!pb->seekable || (!rf64 && !size))
281 case MKTAG('f','a','c','t'):
283 sample_count = avio_rl32(pb);
285 case MKTAG('b','e','x','t'):
286 if ((ret = wav_parse_bext_tag(s, size)) < 0)
289 case MKTAG('L', 'I', 'S', 'T'):
291 av_log(s, AV_LOG_ERROR, "too short LIST");
292 return AVERROR_INVALIDDATA;
294 switch (avio_rl32(pb)) {
295 case MKTAG('I', 'N', 'F', 'O'):
296 if ((ret = ff_read_riff_info(s, size - 4)) < 0)
302 /* seek to next tag unless we know that we'll run into EOF */
303 if ((avio_size(pb) > 0 && next_tag_ofs >= avio_size(pb)) ||
304 avio_seek(pb, next_tag_ofs, SEEK_SET) < 0) {
310 av_log(s, AV_LOG_ERROR, "no 'data' tag found\n");
311 return AVERROR_INVALIDDATA;
314 avio_seek(pb, data_ofs, SEEK_SET);
316 if (!sample_count && st->codec->channels && av_get_bits_per_sample(st->codec->codec_id))
317 sample_count = (data_size<<3) / (st->codec->channels * (uint64_t)av_get_bits_per_sample(st->codec->codec_id));
319 st->duration = sample_count;
321 ff_metadata_conv_ctx(s, NULL, wav_metadata_conv);
322 ff_metadata_conv_ctx(s, NULL, ff_riff_info_conv);
327 /** Find chunk with w64 GUID by skipping over other chunks
328 * @return the size of the found chunk
330 static int64_t find_guid(AVIOContext *pb, const uint8_t guid1[16])
335 while (!pb->eof_reached) {
336 avio_read(pb, guid, 16);
337 size = avio_rl64(pb);
340 if (!memcmp(guid, guid1, 16))
342 avio_skip(pb, FFALIGN(size, INT64_C(8)) - 24);
347 static const uint8_t guid_data[16] = { 'd', 'a', 't', 'a',
348 0xF3, 0xAC, 0xD3, 0x11, 0x8C, 0xD1, 0x00, 0xC0, 0x4F, 0x8E, 0xDB, 0x8A };
350 #define MAX_SIZE 4096
352 static int wav_read_packet(AVFormatContext *s,
358 WAVDemuxContext *wav = s->priv_data;
362 left = wav->data_end - avio_tell(s->pb);
364 if (CONFIG_W64_DEMUXER && wav->w64)
365 left = find_guid(s->pb, guid_data) - 24;
367 left = find_tag(s->pb, MKTAG('d', 'a', 't', 'a'));
370 wav->data_end= avio_tell(s->pb) + left;
374 if (st->codec->block_align > 1) {
375 if (size < st->codec->block_align)
376 size = st->codec->block_align;
377 size = (size / st->codec->block_align) * st->codec->block_align;
379 size = FFMIN(size, left);
380 ret = av_get_packet(s->pb, pkt, size);
383 pkt->stream_index = 0;
388 static int wav_read_seek(AVFormatContext *s,
389 int stream_index, int64_t timestamp, int flags)
394 switch (st->codec->codec_id) {
395 case AV_CODEC_ID_MP2:
396 case AV_CODEC_ID_MP3:
397 case AV_CODEC_ID_AC3:
398 case AV_CODEC_ID_DTS:
399 /* use generic seeking with dynamically generated indexes */
404 return ff_pcm_read_seek(s, stream_index, timestamp, flags);
407 AVInputFormat ff_wav_demuxer = {
409 .long_name = NULL_IF_CONFIG_SMALL("WAV / WAVE (Waveform Audio)"),
410 .priv_data_size = sizeof(WAVDemuxContext),
411 .read_probe = wav_probe,
412 .read_header = wav_read_header,
413 .read_packet = wav_read_packet,
414 .read_seek = wav_read_seek,
415 .flags = AVFMT_GENERIC_INDEX,
416 .codec_tag = (const AVCodecTag* const []){ ff_codec_wav_tags, 0 },
418 #endif /* CONFIG_WAV_DEMUXER */
421 #if CONFIG_W64_DEMUXER
422 static const uint8_t guid_riff[16] = { 'r', 'i', 'f', 'f',
423 0x2E, 0x91, 0xCF, 0x11, 0xA5, 0xD6, 0x28, 0xDB, 0x04, 0xC1, 0x00, 0x00 };
425 static const uint8_t guid_wave[16] = { 'w', 'a', 'v', 'e',
426 0xF3, 0xAC, 0xD3, 0x11, 0x8C, 0xD1, 0x00, 0xC0, 0x4F, 0x8E, 0xDB, 0x8A };
428 static const uint8_t guid_fmt [16] = { 'f', 'm', 't', ' ',
429 0xF3, 0xAC, 0xD3, 0x11, 0x8C, 0xD1, 0x00, 0xC0, 0x4F, 0x8E, 0xDB, 0x8A };
431 static int w64_probe(AVProbeData *p)
433 if (p->buf_size <= 40)
435 if (!memcmp(p->buf, guid_riff, 16) &&
436 !memcmp(p->buf + 24, guid_wave, 16))
437 return AVPROBE_SCORE_MAX;
442 static int w64_read_header(AVFormatContext *s)
445 AVIOContext *pb = s->pb;
446 WAVDemuxContext *wav = s->priv_data;
451 avio_read(pb, guid, 16);
452 if (memcmp(guid, guid_riff, 16))
455 if (avio_rl64(pb) < 16 + 8 + 16 + 8 + 16 + 8) /* riff + wave + fmt + sizes */
458 avio_read(pb, guid, 16);
459 if (memcmp(guid, guid_wave, 16)) {
460 av_log(s, AV_LOG_ERROR, "could not find wave guid\n");
464 size = find_guid(pb, guid_fmt);
466 av_log(s, AV_LOG_ERROR, "could not find fmt guid\n");
470 st = avformat_new_stream(s, NULL);
472 return AVERROR(ENOMEM);
474 /* subtract chunk header size - normal wav file doesn't count it */
475 ret = ff_get_wav_header(pb, st->codec, size - 24);
478 avio_skip(pb, FFALIGN(size, INT64_C(8)) - size);
480 st->need_parsing = AVSTREAM_PARSE_FULL;
482 avpriv_set_pts_info(st, 64, 1, st->codec->sample_rate);
484 size = find_guid(pb, guid_data);
486 av_log(s, AV_LOG_ERROR, "could not find data guid\n");
489 wav->data_end = avio_tell(pb) + size - 24;
495 AVInputFormat ff_w64_demuxer = {
497 .long_name = NULL_IF_CONFIG_SMALL("Sony Wave64"),
498 .priv_data_size = sizeof(WAVDemuxContext),
499 .read_probe = w64_probe,
500 .read_header = w64_read_header,
501 .read_packet = wav_read_packet,
502 .read_seek = wav_read_seek,
503 .flags = AVFMT_GENERIC_INDEX,
504 .codec_tag = (const AVCodecTag* const []){ ff_codec_wav_tags, 0 },
506 #endif /* CONFIG_W64_DEMUXER */