2 * WAV muxer and demuxer
3 * Copyright (c) 2001, 2002 Fabrice Bellard
6 * Copyright (c) 2009 Daniel Verkamp
8 * This file is part of FFmpeg.
10 * FFmpeg is free software; you can redistribute it and/or
11 * modify it under the terms of the GNU Lesser General Public
12 * License as published by the Free Software Foundation; either
13 * version 2.1 of the License, or (at your option) any later version.
15 * FFmpeg is distributed in the hope that it will be useful,
16 * but WITHOUT ANY WARRANTY; without even the implied warranty of
17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
18 * Lesser General Public License for more details.
20 * You should have received a copy of the GNU Lesser General Public
21 * License along with FFmpeg; if not, write to the Free Software
22 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
38 static int wav_write_header(AVFormatContext *s)
40 WAVContext *wav = s->priv_data;
41 ByteIOContext *pb = s->pb;
45 put_le32(pb, 0); /* file length */
49 fmt = ff_start_tag(pb, "fmt ");
50 if (ff_put_wav_header(pb, s->streams[0]->codec) < 0) {
51 av_log(s, AV_LOG_ERROR, "%s codec not supported in WAVE format\n",
52 s->streams[0]->codec->codec ? s->streams[0]->codec->codec->name : "NONE");
58 if(s->streams[0]->codec->codec_tag != 0x01 /* hence for all other than PCM */
59 && !url_is_streamed(s->pb)) {
60 fact = ff_start_tag(pb, "fact");
65 av_set_pts_info(s->streams[0], 64, 1, s->streams[0]->codec->sample_rate);
66 wav->maxpts = wav->last_duration = 0;
67 wav->minpts = INT64_MAX;
70 wav->data = ff_start_tag(pb, "data");
77 static int wav_write_packet(AVFormatContext *s, AVPacket *pkt)
79 ByteIOContext *pb = s->pb;
80 WAVContext *wav = s->priv_data;
81 put_buffer(pb, pkt->data, pkt->size);
82 if(pkt->pts != AV_NOPTS_VALUE) {
83 wav->minpts = FFMIN(wav->minpts, pkt->pts);
84 wav->maxpts = FFMAX(wav->maxpts, pkt->pts);
85 wav->last_duration = pkt->duration;
87 av_log(s, AV_LOG_ERROR, "wav_write_packet: NOPTS\n");
91 static int wav_write_trailer(AVFormatContext *s)
93 ByteIOContext *pb = s->pb;
94 WAVContext *wav = s->priv_data;
97 if (!url_is_streamed(s->pb)) {
98 ff_end_tag(pb, wav->data);
100 /* update file size */
101 file_size = url_ftell(pb);
102 url_fseek(pb, 4, SEEK_SET);
103 put_le32(pb, (uint32_t)(file_size - 8));
104 url_fseek(pb, file_size, SEEK_SET);
106 put_flush_packet(pb);
108 if(s->streams[0]->codec->codec_tag != 0x01) {
109 /* Update num_samps in fact chunk */
110 int number_of_samples;
111 number_of_samples = av_rescale(wav->maxpts - wav->minpts + wav->last_duration,
112 s->streams[0]->codec->sample_rate * (int64_t)s->streams[0]->time_base.num,
113 s->streams[0]->time_base.den);
114 url_fseek(pb, wav->data-12, SEEK_SET);
115 put_le32(pb, number_of_samples);
116 url_fseek(pb, file_size, SEEK_SET);
117 put_flush_packet(pb);
122 #endif /* CONFIG_WAV_MUXER */
124 /* return the size of the found tag */
125 static int64_t find_tag(ByteIOContext *pb, uint32_t tag1)
137 url_fseek(pb, size, SEEK_CUR);
142 static int wav_probe(AVProbeData *p)
144 /* check file header */
145 if (p->buf_size <= 32)
147 if (p->buf[0] == 'R' && p->buf[1] == 'I' &&
148 p->buf[2] == 'F' && p->buf[3] == 'F' &&
149 p->buf[8] == 'W' && p->buf[9] == 'A' &&
150 p->buf[10] == 'V' && p->buf[11] == 'E')
152 Since ACT demuxer has standard WAV header at top of it's own,
153 returning score is decreased to avoid probe conflict
156 return AVPROBE_SCORE_MAX - 1;
162 static int wav_read_header(AVFormatContext *s,
163 AVFormatParameters *ap)
167 ByteIOContext *pb = s->pb;
169 WAVContext *wav = s->priv_data;
171 /* check RIFF header */
174 if (tag != MKTAG('R', 'I', 'F', 'F'))
176 get_le32(pb); /* file size */
178 if (tag != MKTAG('W', 'A', 'V', 'E'))
181 /* parse fmt header */
182 size = find_tag(pb, MKTAG('f', 'm', 't', ' '));
185 st = av_new_stream(s, 0);
187 return AVERROR(ENOMEM);
189 ff_get_wav_header(pb, st->codec, size);
190 st->need_parsing = AVSTREAM_PARSE_FULL;
192 av_set_pts_info(st, 64, 1, st->codec->sample_rate);
194 size = find_tag(pb, MKTAG('d', 'a', 't', 'a'));
197 wav->data_end= url_ftell(pb) + size;
201 #if CONFIG_W64_DEMUXER
203 static const uint8_t guid_riff[16] = { 'r', 'i', 'f', 'f',
204 0x2E, 0x91, 0xCF, 0x11, 0xA5, 0xD6, 0x28, 0xDB, 0x04, 0xC1, 0x00, 0x00 };
206 static const uint8_t guid_wave[16] = { 'w', 'a', 'v', 'e',
207 0xF3, 0xAC, 0xD3, 0x11, 0x8C, 0xD1, 0x00, 0xC0, 0x4F, 0x8E, 0xDB, 0x8A };
209 static const uint8_t guid_fmt [16] = { 'f', 'm', 't', ' ',
210 0xF3, 0xAC, 0xD3, 0x11, 0x8C, 0xD1, 0x00, 0xC0, 0x4F, 0x8E, 0xDB, 0x8A };
212 static const uint8_t guid_data[16] = { 'd', 'a', 't', 'a',
213 0xF3, 0xAC, 0xD3, 0x11, 0x8C, 0xD1, 0x00, 0xC0, 0x4F, 0x8E, 0xDB, 0x8A };
215 static int w64_probe(AVProbeData *p)
217 if (p->buf_size <= 40)
219 if (!memcmp(p->buf, guid_riff, 16) &&
220 !memcmp(p->buf + 24, guid_wave, 16)) {
221 return AVPROBE_SCORE_MAX;
226 /** Find chunk with w64 GUID by skipping over other chunks
227 * @return the size of the found chunk
229 static int64_t find_guid(ByteIOContext *pb, const uint8_t guid1[16])
234 while (!url_feof(pb)) {
235 get_buffer(pb, guid, 16);
239 if (!memcmp(guid, guid1, 16))
241 url_fskip(pb, FFALIGN(size, INT64_C(8)) - 24);
246 static int w64_read_header(AVFormatContext *s, AVFormatParameters *ap)
249 ByteIOContext *pb = s->pb;
250 WAVContext *wav = s->priv_data;
254 get_buffer(pb, guid, 16);
255 if (memcmp(guid, guid_riff, 16))
258 if (get_le64(pb) < 16 + 8 + 16 + 8 + 16 + 8) /* riff + wave + fmt + sizes */
261 get_buffer(pb, guid, 16);
262 if (memcmp(guid, guid_wave, 16)) {
263 av_log(s, AV_LOG_ERROR, "could not find wave guid\n");
267 size = find_guid(pb, guid_fmt);
269 av_log(s, AV_LOG_ERROR, "could not find fmt guid\n");
273 st = av_new_stream(s, 0);
275 return AVERROR(ENOMEM);
277 /* subtract chunk header size - normal wav file doesn't count it */
278 ff_get_wav_header(pb, st->codec, size - 24);
279 url_fskip(pb, FFALIGN(size, INT64_C(8)) - size);
281 st->need_parsing = AVSTREAM_PARSE_FULL;
283 av_set_pts_info(st, 64, 1, st->codec->sample_rate);
285 size = find_guid(pb, guid_data);
287 av_log(s, AV_LOG_ERROR, "could not find data guid\n");
290 wav->data_end = url_ftell(pb) + size - 24;
295 #endif /* CONFIG_W64_DEMUXER */
297 #define MAX_SIZE 4096
299 static int wav_read_packet(AVFormatContext *s,
305 WAVContext *wav = s->priv_data;
311 left= wav->data_end - url_ftell(s->pb);
313 if (CONFIG_W64_DEMUXER && wav->w64) {
314 left = find_guid(s->pb, guid_data) - 24;
316 left = find_tag(s->pb, MKTAG('d', 'a', 't', 'a'));
320 wav->data_end= url_ftell(s->pb) + left;
324 if (st->codec->block_align > 1) {
325 if (size < st->codec->block_align)
326 size = st->codec->block_align;
327 size = (size / st->codec->block_align) * st->codec->block_align;
329 size= FFMIN(size, left);
330 ret= av_get_packet(s->pb, pkt, size);
333 pkt->stream_index = 0;
335 /* note: we need to modify the packet size here to handle the last
341 static int wav_read_seek(AVFormatContext *s,
342 int stream_index, int64_t timestamp, int flags)
347 switch(st->codec->codec_id) {
352 /* use generic seeking with dynamically generated indexes */
357 return pcm_read_seek(s, stream_index, timestamp, flags);
360 #if CONFIG_WAV_DEMUXER
361 AVInputFormat wav_demuxer = {
363 NULL_IF_CONFIG_SMALL("WAV format"),
370 .flags= AVFMT_GENERIC_INDEX,
371 .codec_tag= (const AVCodecTag* const []){ff_codec_wav_tags, 0},
375 AVOutputFormat wav_muxer = {
377 NULL_IF_CONFIG_SMALL("WAV format"),
386 .codec_tag= (const AVCodecTag* const []){ff_codec_wav_tags, 0},
389 #if CONFIG_W64_DEMUXER
390 AVInputFormat w64_demuxer = {
392 NULL_IF_CONFIG_SMALL("Sony Wave64 format"),
399 .flags = AVFMT_GENERIC_INDEX,
400 .codec_tag = (const AVCodecTag* const []){ff_codec_wav_tags, 0},