1 /*
2 * WAV muxer
3 * Copyright (c) 2001, 2002 Fabrice Bellard
4 *
5 * Sony Wave64 muxer
6 * Copyright (c) 2012 Paul B Mahol
7 *
8 * WAV muxer RF64 support
9 * Copyright (c) 2013 Daniel Verkamp <daniel@drv.nu>
10 *
11 * EBU Tech 3285 - Supplement 3 - Peak Envelope Chunk encoder
12 * Copyright (c) 2014 Georg Lippitsch <georg.lippitsch@gmx.at>
13 *
14 * This file is part of FFmpeg.
15 *
16 * FFmpeg is free software; you can redistribute it and/or
17 * modify it under the terms of the GNU Lesser General Public
18 * License as published by the Free Software Foundation; either
19 * version 2.1 of the License, or (at your option) any later version.
20 *
21 * FFmpeg is distributed in the hope that it will be useful,
22 * but WITHOUT ANY WARRANTY; without even the implied warranty of
23 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
24 * Lesser General Public License for more details.
25 *
26 * You should have received a copy of the GNU Lesser General Public
27 * License along with FFmpeg; if not, write to the Free Software
28 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
29 */
30
31 #include "config_components.h"
32
33 #include <stdint.h>
34 #include <string.h>
35
36 #include "libavutil/avstring.h"
37 #include "libavutil/dict.h"
38 #include "libavutil/common.h"
39 #include "libavutil/intreadwrite.h"
40 #include "libavutil/mathematics.h"
41 #include "libavutil/opt.h"
42 #include "libavutil/time.h"
43 #include "libavutil/time_internal.h"
44
45 #include "avformat.h"
46 #include "avio.h"
47 #include "avio_internal.h"
48 #include "internal.h"
49 #include "riff.h"
50
51 #define RF64_AUTO (-1)
52 #define RF64_NEVER 0
53 #define RF64_ALWAYS 1
54
55 typedef enum {
56 PEAK_OFF = 0,
57 PEAK_ON,
58 PEAK_ONLY
59 } PeakType;
60
61 typedef enum {
62 PEAK_FORMAT_UINT8 = 1,
63 PEAK_FORMAT_UINT16
64 } PeakFormat;
65
66 typedef struct WAVMuxContext {
67 const AVClass *class;
68 int64_t data;
69 int64_t fact_pos;
70 int64_t ds64;
71 int64_t minpts;
72 int64_t maxpts;
73 int16_t *peak_maxpos, *peak_maxneg;
74 uint32_t peak_num_frames;
75 unsigned peak_outbuf_size;
76 uint32_t peak_outbuf_bytes;
77 unsigned size_increment;
78 uint8_t *peak_output;
79 int last_duration;
80 int write_bext;
81 int write_peak;
82 int rf64;
83 int peak_block_size;
84 int peak_format;
85 int peak_block_pos;
86 int peak_ppv;
87 int peak_bps;
88 } WAVMuxContext;
89
90 #if CONFIG_WAV_MUXER
bwf_write_bext_string(AVFormatContext * s,const char * key,int maxlen)91 static inline void bwf_write_bext_string(AVFormatContext *s, const char *key, int maxlen)
92 {
93 AVDictionaryEntry *tag;
94 size_t len = 0;
95
96 if (tag = av_dict_get(s->metadata, key, NULL, 0)) {
97 len = strlen(tag->value);
98 len = FFMIN(len, maxlen);
99 avio_write(s->pb, tag->value, len);
100 }
101
102 ffio_fill(s->pb, 0, maxlen - len);
103 }
104
bwf_write_bext_chunk(AVFormatContext * s)105 static void bwf_write_bext_chunk(AVFormatContext *s)
106 {
107 AVDictionaryEntry *tmp_tag;
108 uint64_t time_reference = 0;
109 int64_t bext = ff_start_tag(s->pb, "bext");
110
111 bwf_write_bext_string(s, "description", 256);
112 bwf_write_bext_string(s, "originator", 32);
113 bwf_write_bext_string(s, "originator_reference", 32);
114 bwf_write_bext_string(s, "origination_date", 10);
115 bwf_write_bext_string(s, "origination_time", 8);
116
117 if (tmp_tag = av_dict_get(s->metadata, "time_reference", NULL, 0))
118 time_reference = strtoll(tmp_tag->value, NULL, 10);
119 avio_wl64(s->pb, time_reference);
120 avio_wl16(s->pb, 1); // set version to 1
121
122 if ((tmp_tag = av_dict_get(s->metadata, "umid", NULL, 0)) && strlen(tmp_tag->value) > 2) {
123 unsigned char umidpart_str[17] = {0};
124 int64_t i;
125 uint64_t umidpart;
126 size_t len = strlen(tmp_tag->value+2);
127
128 for (i = 0; i < len/16; i++) {
129 memcpy(umidpart_str, tmp_tag->value + 2 + (i*16), 16);
130 umidpart = strtoll(umidpart_str, NULL, 16);
131 avio_wb64(s->pb, umidpart);
132 }
133 ffio_fill(s->pb, 0, 64 - i*8);
134 } else
135 ffio_fill(s->pb, 0, 64); // zero UMID
136
137 ffio_fill(s->pb, 0, 190); // Reserved
138
139 if (tmp_tag = av_dict_get(s->metadata, "coding_history", NULL, 0))
140 avio_put_str(s->pb, tmp_tag->value);
141
142 ff_end_tag(s->pb, bext);
143 }
144
wav_deinit(AVFormatContext * s)145 static av_cold void wav_deinit(AVFormatContext *s)
146 {
147 WAVMuxContext *wav = s->priv_data;
148
149 av_freep(&wav->peak_maxpos);
150 av_freep(&wav->peak_maxneg);
151 av_freep(&wav->peak_output);
152 }
153
peak_init_writer(AVFormatContext * s)154 static av_cold int peak_init_writer(AVFormatContext *s)
155 {
156 WAVMuxContext *wav = s->priv_data;
157 AVCodecParameters *par = s->streams[0]->codecpar;
158
159 if (par->codec_id != AV_CODEC_ID_PCM_S8 &&
160 par->codec_id != AV_CODEC_ID_PCM_S16LE &&
161 par->codec_id != AV_CODEC_ID_PCM_U8 &&
162 par->codec_id != AV_CODEC_ID_PCM_U16LE) {
163 av_log(s, AV_LOG_ERROR, "Codec %s not supported for Peak Chunk\n",
164 avcodec_get_name(par->codec_id));
165 return -1;
166 }
167
168 wav->peak_bps = av_get_bits_per_sample(par->codec_id) / 8;
169
170 if (wav->peak_bps == 1 && wav->peak_format == PEAK_FORMAT_UINT16) {
171 av_log(s, AV_LOG_ERROR,
172 "Writing 16 bit peak for 8 bit audio does not make sense\n");
173 return AVERROR(EINVAL);
174 }
175 if (par->ch_layout.nb_channels > INT_MAX / (wav->peak_bps * wav->peak_ppv))
176 return AVERROR(ERANGE);
177 wav->size_increment = par->ch_layout.nb_channels * wav->peak_bps * wav->peak_ppv;
178
179 wav->peak_maxpos = av_calloc(par->ch_layout.nb_channels, sizeof(*wav->peak_maxpos));
180 wav->peak_maxneg = av_calloc(par->ch_layout.nb_channels, sizeof(*wav->peak_maxneg));
181 if (!wav->peak_maxpos || !wav->peak_maxneg)
182 goto nomem;
183
184 return 0;
185
186 nomem:
187 av_log(s, AV_LOG_ERROR, "Out of memory\n");
188 return AVERROR(ENOMEM);
189 }
190
peak_write_frame(AVFormatContext * s)191 static int peak_write_frame(AVFormatContext *s)
192 {
193 WAVMuxContext *wav = s->priv_data;
194 AVCodecParameters *par = s->streams[0]->codecpar;
195 unsigned new_size = wav->peak_outbuf_bytes + wav->size_increment;
196 uint8_t *tmp;
197 int c;
198
199 if (new_size > INT_MAX) {
200 wav->write_peak = PEAK_OFF;
201 return AVERROR(ERANGE);
202 }
203 tmp = av_fast_realloc(wav->peak_output, &wav->peak_outbuf_size, new_size);
204 if (!tmp) {
205 wav->write_peak = PEAK_OFF;
206 return AVERROR(ENOMEM);
207 }
208 wav->peak_output = tmp;
209
210 for (c = 0; c < par->ch_layout.nb_channels; c++) {
211 wav->peak_maxneg[c] = -wav->peak_maxneg[c];
212
213 if (wav->peak_bps == 2 && wav->peak_format == PEAK_FORMAT_UINT8) {
214 wav->peak_maxpos[c] = wav->peak_maxpos[c] / 256;
215 wav->peak_maxneg[c] = wav->peak_maxneg[c] / 256;
216 }
217
218 if (wav->peak_ppv == 1)
219 wav->peak_maxpos[c] =
220 FFMAX(wav->peak_maxpos[c], wav->peak_maxneg[c]);
221
222 if (wav->peak_format == PEAK_FORMAT_UINT8) {
223 wav->peak_output[wav->peak_outbuf_bytes++] =
224 wav->peak_maxpos[c];
225 if (wav->peak_ppv == 2) {
226 wav->peak_output[wav->peak_outbuf_bytes++] =
227 wav->peak_maxneg[c];
228 }
229 } else {
230 AV_WL16(wav->peak_output + wav->peak_outbuf_bytes,
231 wav->peak_maxpos[c]);
232 wav->peak_outbuf_bytes += 2;
233 if (wav->peak_ppv == 2) {
234 AV_WL16(wav->peak_output + wav->peak_outbuf_bytes,
235 wav->peak_maxneg[c]);
236 wav->peak_outbuf_bytes += 2;
237 }
238 }
239 wav->peak_maxpos[c] = 0;
240 wav->peak_maxneg[c] = 0;
241 }
242 wav->peak_num_frames++;
243
244 return 0;
245 }
246
peak_write_chunk(AVFormatContext * s)247 static int peak_write_chunk(AVFormatContext *s)
248 {
249 WAVMuxContext *wav = s->priv_data;
250 AVIOContext *pb = s->pb;
251 AVCodecParameters *par = s->streams[0]->codecpar;
252 int64_t peak = ff_start_tag(s->pb, "levl");
253 int64_t now0;
254 time_t now_secs;
255 char timestamp[28];
256
257 /* Peak frame of incomplete block at end */
258 if (wav->peak_block_pos) {
259 int ret = peak_write_frame(s);
260 if (ret < 0)
261 return ret;
262 }
263
264 memset(timestamp, 0, sizeof(timestamp));
265 if (!(s->flags & AVFMT_FLAG_BITEXACT)) {
266 struct tm tmpbuf;
267 av_log(s, AV_LOG_INFO, "Writing local time and date to Peak Envelope Chunk\n");
268 now0 = av_gettime();
269 now_secs = now0 / 1000000;
270 if (strftime(timestamp, sizeof(timestamp), "%Y:%m:%d:%H:%M:%S:", localtime_r(&now_secs, &tmpbuf))) {
271 av_strlcatf(timestamp, sizeof(timestamp), "%03d", (int)((now0 / 1000) % 1000));
272 } else {
273 av_log(s, AV_LOG_ERROR, "Failed to write timestamp\n");
274 return -1;
275 }
276 }
277
278 avio_wl32(pb, 1); /* version */
279 avio_wl32(pb, wav->peak_format); /* 8 or 16 bit */
280 avio_wl32(pb, wav->peak_ppv); /* positive and negative */
281 avio_wl32(pb, wav->peak_block_size); /* frames per value */
282 avio_wl32(pb, par->ch_layout.nb_channels); /* number of channels */
283 avio_wl32(pb, wav->peak_num_frames); /* number of peak frames */
284 avio_wl32(pb, -1); /* audio sample frame position (not implemented) */
285 avio_wl32(pb, 128); /* equal to size of header */
286 avio_write(pb, timestamp, 28); /* ASCII time stamp */
287 ffio_fill(pb, 0, 60);
288
289 avio_write(pb, wav->peak_output, wav->peak_outbuf_bytes);
290
291 ff_end_tag(pb, peak);
292
293 if (!wav->data)
294 wav->data = peak;
295
296 return 0;
297 }
298
wav_write_header(AVFormatContext * s)299 static int wav_write_header(AVFormatContext *s)
300 {
301 WAVMuxContext *wav = s->priv_data;
302 AVIOContext *pb = s->pb;
303 int64_t fmt;
304
305 if (s->nb_streams != 1) {
306 av_log(s, AV_LOG_ERROR, "WAVE files have exactly one stream\n");
307 return AVERROR(EINVAL);
308 }
309
310 if (wav->rf64 == RF64_ALWAYS) {
311 ffio_wfourcc(pb, "RF64");
312 avio_wl32(pb, -1); /* RF64 chunk size: use size in ds64 */
313 } else {
314 ffio_wfourcc(pb, "RIFF");
315 avio_wl32(pb, -1); /* file length */
316 }
317
318 ffio_wfourcc(pb, "WAVE");
319
320 if (wav->rf64 != RF64_NEVER) {
321 /* write empty ds64 chunk or JUNK chunk to reserve space for ds64 */
322 ffio_wfourcc(pb, wav->rf64 == RF64_ALWAYS ? "ds64" : "JUNK");
323 avio_wl32(pb, 28); /* chunk size */
324 wav->ds64 = avio_tell(pb);
325 ffio_fill(pb, 0, 28);
326 }
327
328 if (wav->write_peak != PEAK_ONLY) {
329 /* format header */
330 fmt = ff_start_tag(pb, "fmt ");
331 if (ff_put_wav_header(s, pb, s->streams[0]->codecpar, 0) < 0) {
332 av_log(s, AV_LOG_ERROR, "Codec %s not supported in WAVE format\n",
333 avcodec_get_name(s->streams[0]->codecpar->codec_id));
334 return AVERROR(ENOSYS);
335 }
336 ff_end_tag(pb, fmt);
337 }
338
339 if (s->streams[0]->codecpar->codec_tag != 0x01 /* hence for all other than PCM */
340 && (s->pb->seekable & AVIO_SEEKABLE_NORMAL)) {
341 wav->fact_pos = ff_start_tag(pb, "fact");
342 avio_wl32(pb, 0);
343 ff_end_tag(pb, wav->fact_pos);
344 }
345
346 if (wav->write_bext)
347 bwf_write_bext_chunk(s);
348
349 if (wav->write_peak) {
350 int ret;
351 if ((ret = peak_init_writer(s)) < 0)
352 return ret;
353 }
354
355 avpriv_set_pts_info(s->streams[0], 64, 1, s->streams[0]->codecpar->sample_rate);
356 wav->maxpts = wav->last_duration = 0;
357 wav->minpts = INT64_MAX;
358
359 if (wav->write_peak != PEAK_ONLY) {
360 /* info header */
361 ff_riff_write_info(s);
362
363 /* data header */
364 wav->data = ff_start_tag(pb, "data");
365 }
366
367 return 0;
368 }
369
wav_write_packet(AVFormatContext * s,AVPacket * pkt)370 static int wav_write_packet(AVFormatContext *s, AVPacket *pkt)
371 {
372 AVIOContext *pb = s->pb;
373 WAVMuxContext *wav = s->priv_data;
374
375 if (wav->write_peak != PEAK_ONLY)
376 avio_write(pb, pkt->data, pkt->size);
377
378 if (wav->write_peak) {
379 int c = 0;
380 int i;
381 for (i = 0; i < pkt->size; i += wav->peak_bps) {
382 if (wav->peak_bps == 1) {
383 wav->peak_maxpos[c] = FFMAX(wav->peak_maxpos[c], *(int8_t*)(pkt->data + i));
384 wav->peak_maxneg[c] = FFMIN(wav->peak_maxneg[c], *(int8_t*)(pkt->data + i));
385 } else {
386 wav->peak_maxpos[c] = FFMAX(wav->peak_maxpos[c], (int16_t)AV_RL16(pkt->data + i));
387 wav->peak_maxneg[c] = FFMIN(wav->peak_maxneg[c], (int16_t)AV_RL16(pkt->data + i));
388 }
389 if (++c == s->streams[0]->codecpar->ch_layout.nb_channels) {
390 c = 0;
391 if (++wav->peak_block_pos == wav->peak_block_size) {
392 int ret = peak_write_frame(s);
393 if (ret < 0)
394 return ret;
395 wav->peak_block_pos = 0;
396 }
397 }
398 }
399 }
400
401 if(pkt->pts != AV_NOPTS_VALUE) {
402 wav->minpts = FFMIN(wav->minpts, pkt->pts);
403 wav->maxpts = FFMAX(wav->maxpts, pkt->pts);
404 wav->last_duration = pkt->duration;
405 } else
406 av_log(s, AV_LOG_ERROR, "wav_write_packet: NOPTS\n");
407 return 0;
408 }
409
wav_write_trailer(AVFormatContext * s)410 static int wav_write_trailer(AVFormatContext *s)
411 {
412 AVIOContext *pb = s->pb;
413 WAVMuxContext *wav = s->priv_data;
414 int64_t file_size, data_size;
415 int64_t number_of_samples = 0;
416 int rf64 = 0;
417 int ret = 0;
418
419 if (s->pb->seekable & AVIO_SEEKABLE_NORMAL) {
420 if (wav->write_peak != PEAK_ONLY && avio_tell(pb) - wav->data < UINT32_MAX) {
421 ff_end_tag(pb, wav->data);
422 }
423
424 if (wav->write_peak && wav->peak_output) {
425 ret = peak_write_chunk(s);
426 }
427
428 /* update file size */
429 file_size = avio_tell(pb);
430 data_size = file_size - wav->data;
431 if (wav->rf64 == RF64_ALWAYS || (wav->rf64 == RF64_AUTO && file_size - 8 > UINT32_MAX)) {
432 rf64 = 1;
433 } else if (file_size - 8 <= UINT32_MAX) {
434 avio_seek(pb, 4, SEEK_SET);
435 avio_wl32(pb, (uint32_t)(file_size - 8));
436 avio_seek(pb, file_size, SEEK_SET);
437 } else {
438 av_log(s, AV_LOG_ERROR,
439 "Filesize %"PRId64" invalid for wav, output file will be broken\n",
440 file_size);
441 }
442 number_of_samples = av_rescale_q(wav->maxpts - wav->minpts + wav->last_duration,
443 s->streams[0]->time_base,
444 av_make_q(1, s->streams[0]->codecpar->sample_rate));
445
446 if(s->streams[0]->codecpar->codec_tag != 0x01) {
447 /* Update num_samps in fact chunk */
448 avio_seek(pb, wav->fact_pos, SEEK_SET);
449 if (rf64 || (wav->rf64 == RF64_AUTO && number_of_samples > UINT32_MAX)) {
450 rf64 = 1;
451 avio_wl32(pb, -1);
452 } else {
453 avio_wl32(pb, number_of_samples);
454 avio_seek(pb, file_size, SEEK_SET);
455 }
456 }
457
458 if (rf64) {
459 /* overwrite RIFF with RF64 */
460 avio_seek(pb, 0, SEEK_SET);
461 ffio_wfourcc(pb, "RF64");
462 avio_wl32(pb, -1);
463
464 /* write ds64 chunk (overwrite JUNK if rf64 == RF64_AUTO) */
465 avio_seek(pb, wav->ds64 - 8, SEEK_SET);
466 ffio_wfourcc(pb, "ds64");
467 avio_wl32(pb, 28); /* ds64 chunk size */
468 avio_wl64(pb, file_size - 8); /* RF64 chunk size */
469 avio_wl64(pb, data_size); /* data chunk size */
470 avio_wl64(pb, number_of_samples); /* fact chunk number of samples */
471 avio_wl32(pb, 0); /* number of table entries for non-'data' chunks */
472
473 /* write -1 in data chunk size */
474 avio_seek(pb, wav->data - 4, SEEK_SET);
475 avio_wl32(pb, -1);
476
477 avio_seek(pb, file_size, SEEK_SET);
478 }
479 }
480
481 return ret;
482 }
483
484 #define OFFSET(x) offsetof(WAVMuxContext, x)
485 #define ENC AV_OPT_FLAG_ENCODING_PARAM
486 static const AVOption options[] = {
487 { "write_bext", "Write BEXT chunk.", OFFSET(write_bext), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, ENC },
488 { "write_peak", "Write Peak Envelope chunk.", OFFSET(write_peak), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 2, ENC, "peak" },
489 { "off", "Do not write peak chunk.", 0, AV_OPT_TYPE_CONST, { .i64 = PEAK_OFF }, 0, 0, ENC, "peak" },
490 { "on", "Append peak chunk after wav data.", 0, AV_OPT_TYPE_CONST, { .i64 = PEAK_ON }, 0, 0, ENC, "peak" },
491 { "only", "Write only peak chunk, omit wav data.", 0, AV_OPT_TYPE_CONST, { .i64 = PEAK_ONLY }, 0, 0, ENC, "peak" },
492 { "rf64", "Use RF64 header rather than RIFF for large files.", OFFSET(rf64), AV_OPT_TYPE_INT, { .i64 = RF64_NEVER },-1, 1, ENC, "rf64" },
493 { "auto", "Write RF64 header if file grows large enough.", 0, AV_OPT_TYPE_CONST, { .i64 = RF64_AUTO }, 0, 0, ENC, "rf64" },
494 { "always", "Always write RF64 header regardless of file size.", 0, AV_OPT_TYPE_CONST, { .i64 = RF64_ALWAYS }, 0, 0, ENC, "rf64" },
495 { "never", "Never write RF64 header regardless of file size.", 0, AV_OPT_TYPE_CONST, { .i64 = RF64_NEVER }, 0, 0, ENC, "rf64" },
496 { "peak_block_size", "Number of audio samples used to generate each peak frame.", OFFSET(peak_block_size), AV_OPT_TYPE_INT, { .i64 = 256 }, 0, 65536, ENC },
497 { "peak_format", "The format of the peak envelope data (1: uint8, 2: uint16).", OFFSET(peak_format), AV_OPT_TYPE_INT, { .i64 = PEAK_FORMAT_UINT16 }, PEAK_FORMAT_UINT8, PEAK_FORMAT_UINT16, ENC },
498 { "peak_ppv", "Number of peak points per peak value (1 or 2).", OFFSET(peak_ppv), AV_OPT_TYPE_INT, { .i64 = 2 }, 1, 2, ENC },
499 { NULL },
500 };
501
502 static const AVClass wav_muxer_class = {
503 .class_name = "WAV muxer",
504 .item_name = av_default_item_name,
505 .option = options,
506 .version = LIBAVUTIL_VERSION_INT,
507 };
508
509 const AVOutputFormat ff_wav_muxer = {
510 .name = "wav",
511 .long_name = NULL_IF_CONFIG_SMALL("WAV / WAVE (Waveform Audio)"),
512 .mime_type = "audio/x-wav",
513 .extensions = "wav",
514 .priv_data_size = sizeof(WAVMuxContext),
515 .audio_codec = AV_CODEC_ID_PCM_S16LE,
516 .video_codec = AV_CODEC_ID_NONE,
517 .write_header = wav_write_header,
518 .write_packet = wav_write_packet,
519 .write_trailer = wav_write_trailer,
520 .deinit = wav_deinit,
521 .flags = AVFMT_TS_NONSTRICT,
522 .codec_tag = ff_wav_codec_tags_list,
523 .priv_class = &wav_muxer_class,
524 };
525 #endif /* CONFIG_WAV_MUXER */
526
527 #if CONFIG_W64_MUXER
528 #include "w64.h"
529
start_guid(AVIOContext * pb,const uint8_t * guid,int64_t * pos)530 static void start_guid(AVIOContext *pb, const uint8_t *guid, int64_t *pos)
531 {
532 *pos = avio_tell(pb);
533
534 avio_write(pb, guid, 16);
535 avio_wl64(pb, INT64_MAX);
536 }
537
end_guid(AVIOContext * pb,int64_t start)538 static void end_guid(AVIOContext *pb, int64_t start)
539 {
540 int64_t end, pos = avio_tell(pb);
541
542 end = FFALIGN(pos, 8);
543 ffio_fill(pb, 0, end - pos);
544 avio_seek(pb, start + 16, SEEK_SET);
545 avio_wl64(pb, end - start);
546 avio_seek(pb, end, SEEK_SET);
547 }
548
w64_write_header(AVFormatContext * s)549 static int w64_write_header(AVFormatContext *s)
550 {
551 WAVMuxContext *wav = s->priv_data;
552 AVIOContext *pb = s->pb;
553 int64_t start;
554 int ret;
555
556 avio_write(pb, ff_w64_guid_riff, sizeof(ff_w64_guid_riff));
557 avio_wl64(pb, -1);
558 avio_write(pb, ff_w64_guid_wave, sizeof(ff_w64_guid_wave));
559 start_guid(pb, ff_w64_guid_fmt, &start);
560 if ((ret = ff_put_wav_header(s, pb, s->streams[0]->codecpar, 0)) < 0) {
561 av_log(s, AV_LOG_ERROR, "Codec %s not supported\n",
562 avcodec_get_name(s->streams[0]->codecpar->codec_id));
563 return ret;
564 }
565 end_guid(pb, start);
566
567 if (s->streams[0]->codecpar->codec_tag != 0x01 /* hence for all other than PCM */
568 && (s->pb->seekable & AVIO_SEEKABLE_NORMAL)) {
569 start_guid(pb, ff_w64_guid_fact, &wav->fact_pos);
570 avio_wl64(pb, 0);
571 end_guid(pb, wav->fact_pos);
572 }
573
574 start_guid(pb, ff_w64_guid_data, &wav->data);
575
576 return 0;
577 }
578
w64_write_trailer(AVFormatContext * s)579 static int w64_write_trailer(AVFormatContext *s)
580 {
581 AVIOContext *pb = s->pb;
582 WAVMuxContext *wav = s->priv_data;
583 int64_t file_size;
584
585 if (pb->seekable & AVIO_SEEKABLE_NORMAL) {
586 end_guid(pb, wav->data);
587
588 file_size = avio_tell(pb);
589 avio_seek(pb, 16, SEEK_SET);
590 avio_wl64(pb, file_size);
591
592 if (s->streams[0]->codecpar->codec_tag != 0x01) {
593 int64_t number_of_samples;
594
595 number_of_samples = av_rescale(wav->maxpts - wav->minpts + wav->last_duration,
596 s->streams[0]->codecpar->sample_rate * (int64_t)s->streams[0]->time_base.num,
597 s->streams[0]->time_base.den);
598 avio_seek(pb, wav->fact_pos + 24, SEEK_SET);
599 avio_wl64(pb, number_of_samples);
600 }
601
602 avio_seek(pb, file_size, SEEK_SET);
603 }
604
605 return 0;
606 }
607
608 const AVOutputFormat ff_w64_muxer = {
609 .name = "w64",
610 .long_name = NULL_IF_CONFIG_SMALL("Sony Wave64"),
611 .extensions = "w64",
612 .priv_data_size = sizeof(WAVMuxContext),
613 .audio_codec = AV_CODEC_ID_PCM_S16LE,
614 .video_codec = AV_CODEC_ID_NONE,
615 .write_header = w64_write_header,
616 .write_packet = wav_write_packet,
617 .write_trailer = w64_write_trailer,
618 .flags = AVFMT_TS_NONSTRICT,
619 .codec_tag = ff_wav_codec_tags_list,
620 };
621 #endif /* CONFIG_W64_MUXER */
622