3 * Copyright (c) 2001, 2002 Fabrice Bellard
6 * Copyright (c) 2012 Paul B Mahol
8 * WAV muxer RF64 support
9 * Copyright (c) 2013 Daniel Verkamp <daniel@drv.nu>
11 * This file is part of FFmpeg.
13 * FFmpeg is free software; you can redistribute it and/or
14 * modify it under the terms of the GNU Lesser General Public
15 * License as published by the Free Software Foundation; either
16 * version 2.1 of the License, or (at your option) any later version.
18 * FFmpeg is distributed in the hope that it will be useful,
19 * but WITHOUT ANY WARRANTY; without even the implied warranty of
20 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
21 * Lesser General Public License for more details.
23 * You should have received a copy of the GNU Lesser General Public
24 * License along with FFmpeg; if not, write to the Free Software
25 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
31 #include "libavutil/dict.h"
32 #include "libavutil/common.h"
33 #include "libavutil/mathematics.h"
34 #include "libavutil/opt.h"
38 #include "avio_internal.h"
42 #define RF64_AUTO (-1)
46 typedef struct WAVMuxContext {
59 static inline void bwf_write_bext_string(AVFormatContext *s, const char *key, int maxlen)
61 AVDictionaryEntry *tag;
64 if (tag = av_dict_get(s->metadata, key, NULL, 0)) {
65 len = strlen(tag->value);
66 len = FFMIN(len, maxlen);
67 avio_write(s->pb, tag->value, len);
70 ffio_fill(s->pb, 0, maxlen - len);
73 static void bwf_write_bext_chunk(AVFormatContext *s)
75 AVDictionaryEntry *tmp_tag;
76 uint64_t time_reference = 0;
77 int64_t bext = ff_start_tag(s->pb, "bext");
79 bwf_write_bext_string(s, "description", 256);
80 bwf_write_bext_string(s, "originator", 32);
81 bwf_write_bext_string(s, "originator_reference", 32);
82 bwf_write_bext_string(s, "origination_date", 10);
83 bwf_write_bext_string(s, "origination_time", 8);
85 if (tmp_tag = av_dict_get(s->metadata, "time_reference", NULL, 0))
86 time_reference = strtoll(tmp_tag->value, NULL, 10);
87 avio_wl64(s->pb, time_reference);
88 avio_wl16(s->pb, 1); // set version to 1
90 if (tmp_tag = av_dict_get(s->metadata, "umid", NULL, 0)) {
91 unsigned char umidpart_str[17] = {0};
94 int len = strlen(tmp_tag->value+2);
96 for (i = 0; i < len/16; i++) {
97 memcpy(umidpart_str, tmp_tag->value + 2 + (i*16), 16);
98 umidpart = strtoll(umidpart_str, NULL, 16);
99 avio_wb64(s->pb, umidpart);
101 ffio_fill(s->pb, 0, 64 - i*8);
103 ffio_fill(s->pb, 0, 64); // zero UMID
105 ffio_fill(s->pb, 0, 190); // Reserved
107 if (tmp_tag = av_dict_get(s->metadata, "coding_history", NULL, 0))
108 avio_put_str(s->pb, tmp_tag->value);
110 ff_end_tag(s->pb, bext);
113 static int wav_write_header(AVFormatContext *s)
115 WAVMuxContext *wav = s->priv_data;
116 AVIOContext *pb = s->pb;
119 if (wav->rf64 == RF64_ALWAYS) {
120 ffio_wfourcc(pb, "RF64");
121 avio_wl32(pb, -1); /* RF64 chunk size: use size in ds64 */
123 ffio_wfourcc(pb, "RIFF");
124 avio_wl32(pb, 0); /* file length */
127 ffio_wfourcc(pb, "WAVE");
129 if (wav->rf64 != RF64_NEVER) {
130 /* write empty ds64 chunk or JUNK chunk to reserve space for ds64 */
131 ffio_wfourcc(pb, wav->rf64 == RF64_ALWAYS ? "ds64" : "JUNK");
132 avio_wl32(pb, 28); /* chunk size */
133 wav->ds64 = avio_tell(pb);
134 ffio_fill(pb, 0, 28);
138 fmt = ff_start_tag(pb, "fmt ");
139 if (ff_put_wav_header(pb, s->streams[0]->codec) < 0) {
140 av_log(s, AV_LOG_ERROR, "%s codec not supported in WAVE format\n",
141 s->streams[0]->codec->codec ? s->streams[0]->codec->codec->name : "NONE");
146 if (s->streams[0]->codec->codec_tag != 0x01 /* hence for all other than PCM */
147 && s->pb->seekable) {
148 wav->fact_pos = ff_start_tag(pb, "fact");
150 ff_end_tag(pb, wav->fact_pos);
154 bwf_write_bext_chunk(s);
156 avpriv_set_pts_info(s->streams[0], 64, 1, s->streams[0]->codec->sample_rate);
157 wav->maxpts = wav->last_duration = 0;
158 wav->minpts = INT64_MAX;
161 ff_riff_write_info(s);
164 wav->data = ff_start_tag(pb, "data");
171 static int wav_write_packet(AVFormatContext *s, AVPacket *pkt)
173 AVIOContext *pb = s->pb;
174 WAVMuxContext *wav = s->priv_data;
175 avio_write(pb, pkt->data, pkt->size);
176 if(pkt->pts != AV_NOPTS_VALUE) {
177 wav->minpts = FFMIN(wav->minpts, pkt->pts);
178 wav->maxpts = FFMAX(wav->maxpts, pkt->pts);
179 wav->last_duration = pkt->duration;
181 av_log(s, AV_LOG_ERROR, "wav_write_packet: NOPTS\n");
185 static int wav_write_trailer(AVFormatContext *s)
187 AVIOContext *pb = s->pb;
188 WAVMuxContext *wav = s->priv_data;
189 int64_t file_size, data_size;
190 int64_t number_of_samples = 0;
195 if (s->pb->seekable) {
196 /* update file size */
197 file_size = avio_tell(pb);
198 data_size = file_size - wav->data;
199 if (wav->rf64 == RF64_ALWAYS || (wav->rf64 == RF64_AUTO && file_size - 8 > UINT32_MAX)) {
202 avio_seek(pb, 4, SEEK_SET);
203 avio_wl32(pb, (uint32_t)(file_size - 8));
204 avio_seek(pb, file_size, SEEK_SET);
206 ff_end_tag(pb, wav->data);
210 number_of_samples = av_rescale(wav->maxpts - wav->minpts + wav->last_duration,
211 s->streams[0]->codec->sample_rate * (int64_t)s->streams[0]->time_base.num,
212 s->streams[0]->time_base.den);
214 if(s->streams[0]->codec->codec_tag != 0x01) {
215 /* Update num_samps in fact chunk */
216 avio_seek(pb, wav->fact_pos, SEEK_SET);
217 if (rf64 || (wav->rf64 == RF64_AUTO && number_of_samples > UINT32_MAX)) {
221 avio_wl32(pb, number_of_samples);
222 avio_seek(pb, file_size, SEEK_SET);
228 /* overwrite RIFF with RF64 */
229 avio_seek(pb, 0, SEEK_SET);
230 ffio_wfourcc(pb, "RF64");
233 /* write ds64 chunk (overwrite JUNK if rf64 == RF64_AUTO) */
234 avio_seek(pb, wav->ds64 - 8, SEEK_SET);
235 ffio_wfourcc(pb, "ds64");
236 avio_wl32(pb, 28); /* ds64 chunk size */
237 avio_wl64(pb, file_size - 8); /* RF64 chunk size */
238 avio_wl64(pb, data_size); /* data chunk size */
239 avio_wl64(pb, number_of_samples); /* fact chunk number of samples */
240 avio_wl32(pb, 0); /* number of table entries for non-'data' chunks */
242 /* write -1 in data chunk size */
243 avio_seek(pb, wav->data - 4, SEEK_SET);
246 avio_seek(pb, file_size, SEEK_SET);
253 #define OFFSET(x) offsetof(WAVMuxContext, x)
254 #define ENC AV_OPT_FLAG_ENCODING_PARAM
255 static const AVOption options[] = {
256 { "write_bext", "Write BEXT chunk.", OFFSET(write_bext), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 1, ENC },
257 { "rf64", "Use RF64 header rather than RIFF for large files.", OFFSET(rf64), AV_OPT_TYPE_INT, { .i64 = RF64_NEVER },-1, 1, ENC, "rf64" },
258 { "auto", "Write RF64 header if file grows large enough.", 0, AV_OPT_TYPE_CONST, { .i64 = RF64_AUTO }, 0, 0, ENC, "rf64" },
259 { "always", "Always write RF64 header regardless of file size.", 0, AV_OPT_TYPE_CONST, { .i64 = RF64_ALWAYS }, 0, 0, ENC, "rf64" },
260 { "never", "Never write RF64 header regardless of file size.", 0, AV_OPT_TYPE_CONST, { .i64 = RF64_NEVER }, 0, 0, ENC, "rf64" },
264 static const AVClass wav_muxer_class = {
265 .class_name = "WAV muxer",
266 .item_name = av_default_item_name,
268 .version = LIBAVUTIL_VERSION_INT,
271 AVOutputFormat ff_wav_muxer = {
273 .long_name = NULL_IF_CONFIG_SMALL("WAV / WAVE (Waveform Audio)"),
274 .mime_type = "audio/x-wav",
276 .priv_data_size = sizeof(WAVMuxContext),
277 .audio_codec = AV_CODEC_ID_PCM_S16LE,
278 .video_codec = AV_CODEC_ID_NONE,
279 .write_header = wav_write_header,
280 .write_packet = wav_write_packet,
281 .write_trailer = wav_write_trailer,
282 .flags = AVFMT_TS_NONSTRICT,
283 .codec_tag = (const AVCodecTag* const []){ ff_codec_wav_tags, 0 },
284 .priv_class = &wav_muxer_class,
286 #endif /* CONFIG_WAV_MUXER */
291 static void start_guid(AVIOContext *pb, const uint8_t *guid, int64_t *pos)
293 *pos = avio_tell(pb);
295 avio_write(pb, guid, 16);
296 avio_wl64(pb, INT64_MAX);
299 static void end_guid(AVIOContext *pb, int64_t start)
301 int64_t end, pos = avio_tell(pb);
303 end = FFALIGN(pos, 8);
304 ffio_fill(pb, 0, end - pos);
305 avio_seek(pb, start + 16, SEEK_SET);
306 avio_wl64(pb, end - start);
307 avio_seek(pb, end, SEEK_SET);
310 static int w64_write_header(AVFormatContext *s)
312 WAVMuxContext *wav = s->priv_data;
313 AVIOContext *pb = s->pb;
317 avio_write(pb, ff_w64_guid_riff, sizeof(ff_w64_guid_riff));
319 avio_write(pb, ff_w64_guid_wave, sizeof(ff_w64_guid_wave));
320 start_guid(pb, ff_w64_guid_fmt, &start);
321 if ((ret = ff_put_wav_header(pb, s->streams[0]->codec)) < 0) {
322 av_log(s, AV_LOG_ERROR, "%s codec not supported\n",
323 s->streams[0]->codec->codec ? s->streams[0]->codec->codec->name : "NONE");
328 if (s->streams[0]->codec->codec_tag != 0x01 /* hence for all other than PCM */
329 && s->pb->seekable) {
330 start_guid(pb, ff_w64_guid_fact, &wav->fact_pos);
332 end_guid(pb, wav->fact_pos);
335 start_guid(pb, ff_w64_guid_data, &wav->data);
340 static int w64_write_trailer(AVFormatContext *s)
342 AVIOContext *pb = s->pb;
343 WAVMuxContext *wav = s->priv_data;
347 end_guid(pb, wav->data);
349 file_size = avio_tell(pb);
350 avio_seek(pb, 16, SEEK_SET);
351 avio_wl64(pb, file_size);
353 if (s->streams[0]->codec->codec_tag != 0x01) {
354 int64_t number_of_samples;
356 number_of_samples = av_rescale(wav->maxpts - wav->minpts + wav->last_duration,
357 s->streams[0]->codec->sample_rate * (int64_t)s->streams[0]->time_base.num,
358 s->streams[0]->time_base.den);
359 avio_seek(pb, wav->fact_pos + 24, SEEK_SET);
360 avio_wl64(pb, number_of_samples);
363 avio_seek(pb, file_size, SEEK_SET);
370 AVOutputFormat ff_w64_muxer = {
372 .long_name = NULL_IF_CONFIG_SMALL("Sony Wave64"),
374 .priv_data_size = sizeof(WAVMuxContext),
375 .audio_codec = AV_CODEC_ID_PCM_S16LE,
376 .video_codec = AV_CODEC_ID_NONE,
377 .write_header = w64_write_header,
378 .write_packet = wav_write_packet,
379 .write_trailer = w64_write_trailer,
380 .flags = AVFMT_TS_NONSTRICT,
381 .codec_tag = (const AVCodecTag* const []){ ff_codec_wav_tags, 0 },
383 #endif /* CONFIG_W64_MUXER */