2 * WAV muxer and demuxer
3 * Copyright (c) 2001, 2002 Fabrice Bellard
7 * Copyright (c) 2009 Daniel Verkamp
9 * This file is part of FFmpeg.
11 * FFmpeg 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 * FFmpeg 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 FFmpeg; if not, write to the Free Software
23 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
39 static int wav_write_header(AVFormatContext *s)
41 WAVContext *wav = s->priv_data;
42 ByteIOContext *pb = s->pb;
46 put_le32(pb, 0); /* file length */
50 fmt = ff_start_tag(pb, "fmt ");
51 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");
59 if (s->streams[0]->codec->codec_tag != 0x01 /* hence for all other than PCM */
60 && !url_is_streamed(s->pb)) {
61 fact = ff_start_tag(pb, "fact");
66 av_set_pts_info(s->streams[0], 64, 1, s->streams[0]->codec->sample_rate);
67 wav->maxpts = wav->last_duration = 0;
68 wav->minpts = INT64_MAX;
71 wav->data = ff_start_tag(pb, "data");
78 static int wav_write_packet(AVFormatContext *s, AVPacket *pkt)
80 ByteIOContext *pb = s->pb;
81 WAVContext *wav = s->priv_data;
82 put_buffer(pb, pkt->data, pkt->size);
83 if(pkt->pts != AV_NOPTS_VALUE) {
84 wav->minpts = FFMIN(wav->minpts, pkt->pts);
85 wav->maxpts = FFMAX(wav->maxpts, pkt->pts);
86 wav->last_duration = pkt->duration;
88 av_log(s, AV_LOG_ERROR, "wav_write_packet: NOPTS\n");
92 static int wav_write_trailer(AVFormatContext *s)
94 ByteIOContext *pb = s->pb;
95 WAVContext *wav = s->priv_data;
98 if (!url_is_streamed(s->pb)) {
99 ff_end_tag(pb, wav->data);
101 /* update file size */
102 file_size = url_ftell(pb);
103 url_fseek(pb, 4, SEEK_SET);
104 put_le32(pb, (uint32_t)(file_size - 8));
105 url_fseek(pb, file_size, SEEK_SET);
107 put_flush_packet(pb);
109 if(s->streams[0]->codec->codec_tag != 0x01) {
110 /* Update num_samps in fact chunk */
111 int number_of_samples;
112 number_of_samples = av_rescale(wav->maxpts - wav->minpts + wav->last_duration,
113 s->streams[0]->codec->sample_rate * (int64_t)s->streams[0]->time_base.num,
114 s->streams[0]->time_base.den);
115 url_fseek(pb, wav->data-12, SEEK_SET);
116 put_le32(pb, number_of_samples);
117 url_fseek(pb, file_size, SEEK_SET);
118 put_flush_packet(pb);
124 AVOutputFormat wav_muxer = {
126 NULL_IF_CONFIG_SMALL("WAV format"),
135 .codec_tag= (const AVCodecTag* const []){ff_codec_wav_tags, 0},
137 #endif /* CONFIG_WAV_MUXER */
140 #if CONFIG_WAV_DEMUXER
141 /* return the size of the found tag */
142 static int64_t find_tag(ByteIOContext *pb, uint32_t tag1)
154 url_fseek(pb, size, SEEK_CUR);
159 static int wav_probe(AVProbeData *p)
161 /* check file header */
162 if (p->buf_size <= 32)
164 if (!memcmp(p->buf + 8, "WAVE", 4)) {
165 if (!memcmp(p->buf, "RIFF", 4))
167 Since ACT demuxer has standard WAV header at top of it's own,
168 returning score is decreased to avoid probe conflict
171 return AVPROBE_SCORE_MAX - 1;
172 else if (!memcmp(p->buf, "RF64", 4) &&
173 !memcmp(p->buf + 12, "ds64", 4))
174 return AVPROBE_SCORE_MAX;
180 static int wav_read_header(AVFormatContext *s,
181 AVFormatParameters *ap)
183 int64_t size, av_uninit(data_size);
186 ByteIOContext *pb = s->pb;
188 WAVContext *wav = s->priv_data;
190 /* check RIFF header */
193 rf64 = tag == MKTAG('R', 'F', '6', '4');
194 if (!rf64 && tag != MKTAG('R', 'I', 'F', 'F'))
196 get_le32(pb); /* file size */
198 if (tag != MKTAG('W', 'A', 'V', 'E'))
202 if (get_le32(pb) != MKTAG('d', 's', '6', '4'))
207 get_le64(pb); /* RIFF size */
208 data_size = get_le64(pb);
209 url_fskip(pb, size - 16); /* skip rest of ds64 chunk */
212 /* parse fmt header */
213 size = find_tag(pb, MKTAG('f', 'm', 't', ' '));
216 st = av_new_stream(s, 0);
218 return AVERROR(ENOMEM);
220 ff_get_wav_header(pb, st->codec, size);
221 st->need_parsing = AVSTREAM_PARSE_FULL;
223 av_set_pts_info(st, 64, 1, st->codec->sample_rate);
225 size = find_tag(pb, MKTAG('d', 'a', 't', 'a'));
230 wav->data_end= url_ftell(pb) + size;
234 /** Find chunk with w64 GUID by skipping over other chunks
235 * @return the size of the found chunk
237 static int64_t find_guid(ByteIOContext *pb, const uint8_t guid1[16])
242 while (!url_feof(pb)) {
243 get_buffer(pb, guid, 16);
247 if (!memcmp(guid, guid1, 16))
249 url_fskip(pb, FFALIGN(size, INT64_C(8)) - 24);
254 static const uint8_t guid_data[16] = { 'd', 'a', 't', 'a',
255 0xF3, 0xAC, 0xD3, 0x11, 0x8C, 0xD1, 0x00, 0xC0, 0x4F, 0x8E, 0xDB, 0x8A };
257 #define MAX_SIZE 4096
259 static int wav_read_packet(AVFormatContext *s,
265 WAVContext *wav = s->priv_data;
269 left = wav->data_end - url_ftell(s->pb);
271 if (CONFIG_W64_DEMUXER && wav->w64)
272 left = find_guid(s->pb, guid_data) - 24;
274 left = find_tag(s->pb, MKTAG('d', 'a', 't', 'a'));
277 wav->data_end= url_ftell(s->pb) + left;
281 if (st->codec->block_align > 1) {
282 if (size < st->codec->block_align)
283 size = st->codec->block_align;
284 size = (size / st->codec->block_align) * st->codec->block_align;
286 size = FFMIN(size, left);
287 ret = av_get_packet(s->pb, pkt, size);
290 pkt->stream_index = 0;
295 static int wav_read_seek(AVFormatContext *s,
296 int stream_index, int64_t timestamp, int flags)
301 switch (st->codec->codec_id) {
306 /* use generic seeking with dynamically generated indexes */
311 return pcm_read_seek(s, stream_index, timestamp, flags);
314 AVInputFormat wav_demuxer = {
316 NULL_IF_CONFIG_SMALL("WAV format"),
323 .flags= AVFMT_GENERIC_INDEX,
324 .codec_tag= (const AVCodecTag* const []){ff_codec_wav_tags, 0},
326 #endif /* CONFIG_WAV_DEMUXER */
329 #if CONFIG_W64_DEMUXER
330 static const uint8_t guid_riff[16] = { 'r', 'i', 'f', 'f',
331 0x2E, 0x91, 0xCF, 0x11, 0xA5, 0xD6, 0x28, 0xDB, 0x04, 0xC1, 0x00, 0x00 };
333 static const uint8_t guid_wave[16] = { 'w', 'a', 'v', 'e',
334 0xF3, 0xAC, 0xD3, 0x11, 0x8C, 0xD1, 0x00, 0xC0, 0x4F, 0x8E, 0xDB, 0x8A };
336 static const uint8_t guid_fmt [16] = { 'f', 'm', 't', ' ',
337 0xF3, 0xAC, 0xD3, 0x11, 0x8C, 0xD1, 0x00, 0xC0, 0x4F, 0x8E, 0xDB, 0x8A };
339 static int w64_probe(AVProbeData *p)
341 if (p->buf_size <= 40)
343 if (!memcmp(p->buf, guid_riff, 16) &&
344 !memcmp(p->buf + 24, guid_wave, 16))
345 return AVPROBE_SCORE_MAX;
350 static int w64_read_header(AVFormatContext *s, AVFormatParameters *ap)
353 ByteIOContext *pb = s->pb;
354 WAVContext *wav = s->priv_data;
358 get_buffer(pb, guid, 16);
359 if (memcmp(guid, guid_riff, 16))
362 if (get_le64(pb) < 16 + 8 + 16 + 8 + 16 + 8) /* riff + wave + fmt + sizes */
365 get_buffer(pb, guid, 16);
366 if (memcmp(guid, guid_wave, 16)) {
367 av_log(s, AV_LOG_ERROR, "could not find wave guid\n");
371 size = find_guid(pb, guid_fmt);
373 av_log(s, AV_LOG_ERROR, "could not find fmt guid\n");
377 st = av_new_stream(s, 0);
379 return AVERROR(ENOMEM);
381 /* subtract chunk header size - normal wav file doesn't count it */
382 ff_get_wav_header(pb, st->codec, size - 24);
383 url_fskip(pb, FFALIGN(size, INT64_C(8)) - size);
385 st->need_parsing = AVSTREAM_PARSE_FULL;
387 av_set_pts_info(st, 64, 1, st->codec->sample_rate);
389 size = find_guid(pb, guid_data);
391 av_log(s, AV_LOG_ERROR, "could not find data guid\n");
394 wav->data_end = url_ftell(pb) + size - 24;
400 AVInputFormat w64_demuxer = {
402 NULL_IF_CONFIG_SMALL("Sony Wave64 format"),
409 .flags = AVFMT_GENERIC_INDEX,
410 .codec_tag = (const AVCodecTag* const []){ff_codec_wav_tags, 0},
412 #endif /* CONFIG_W64_DEMUXER */