Make url_fsize() return AVERROR(ENOSYS) rather than AVERROR(EPIPE) if
[libav.git] / libavformat / aviobuf.c
CommitLineData
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1/*
2 * Buffered I/O for ffmpeg system
19720f15 3 * Copyright (c) 2000,2001 Fabrice Bellard
de6d9b64 4 *
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5 * This file is part of FFmpeg.
6 *
7 * FFmpeg is free software; you can redistribute it and/or
19720f15
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8 * modify it under the terms of the GNU Lesser General Public
9 * License as published by the Free Software Foundation; either
b78e7197 10 * version 2.1 of the License, or (at your option) any later version.
de6d9b64 11 *
b78e7197 12 * FFmpeg is distributed in the hope that it will be useful,
de6d9b64 13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
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14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * Lesser General Public License for more details.
de6d9b64 16 *
19720f15 17 * You should have received a copy of the GNU Lesser General Public
b78e7197 18 * License along with FFmpeg; if not, write to the Free Software
5509bffa 19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
de6d9b64 20 */
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21
22#include "libavutil/crc.h"
aa805f94 23#include "libavutil/intreadwrite.h"
de6d9b64 24#include "avformat.h"
5c91a675 25#include "avio.h"
abba3dd1 26#include <stdarg.h>
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27
28#define IO_BUFFER_SIZE 32768
29
398f5d3f 30static void fill_buffer(ByteIOContext *s);
08580cb0
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31#if LIBAVFORMAT_VERSION_MAJOR >= 53
32static int url_resetbuf(ByteIOContext *s, int flags);
33#endif
398f5d3f 34
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35int init_put_byte(ByteIOContext *s,
36 unsigned char *buffer,
37 int buffer_size,
38 int write_flag,
39 void *opaque,
0c1a9eda 40 int (*read_packet)(void *opaque, uint8_t *buf, int buf_size),
576ae256 41 int (*write_packet)(void *opaque, uint8_t *buf, int buf_size),
bc5c918e 42 int64_t (*seek)(void *opaque, int64_t offset, int whence))
de6d9b64
FB
43{
44 s->buffer = buffer;
45 s->buffer_size = buffer_size;
46 s->buf_ptr = buffer;
de6d9b64 47 s->opaque = opaque;
9daa4cea 48 url_resetbuf(s, write_flag ? URL_WRONLY : URL_RDONLY);
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49 s->write_packet = write_packet;
50 s->read_packet = read_packet;
51 s->seek = seek;
52 s->pos = 0;
53 s->must_flush = 0;
54 s->eof_reached = 0;
576ae256 55 s->error = 0;
de6d9b64 56 s->is_streamed = 0;
abba3dd1 57 s->max_packet_size = 0;
ee9f36a8 58 s->update_checksum= NULL;
942f3bb5
MN
59 if(!read_packet && !write_flag){
60 s->pos = buffer_size;
61 s->buf_end = s->buffer + buffer_size;
62 }
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63 s->read_pause = NULL;
64 s->read_seek = NULL;
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65 return 0;
66}
115329f1 67
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68ByteIOContext *av_alloc_put_byte(
69 unsigned char *buffer,
70 int buffer_size,
71 int write_flag,
72 void *opaque,
73 int (*read_packet)(void *opaque, uint8_t *buf, int buf_size),
74 int (*write_packet)(void *opaque, uint8_t *buf, int buf_size),
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75 int64_t (*seek)(void *opaque, int64_t offset, int whence))
76{
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77 ByteIOContext *s = av_mallocz(sizeof(ByteIOContext));
78 init_put_byte(s, buffer, buffer_size, write_flag, opaque,
79 read_packet, write_packet, seek);
80 return s;
81}
82
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83static void flush_buffer(ByteIOContext *s)
84{
85 if (s->buf_ptr > s->buffer) {
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86 if (s->write_packet && !s->error){
87 int ret= s->write_packet(s->opaque, s->buffer, s->buf_ptr - s->buffer);
88 if(ret < 0){
89 s->error = ret;
90 }
91 }
465e1dad 92 if(s->update_checksum){
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93 s->checksum= s->update_checksum(s->checksum, s->checksum_ptr, s->buf_ptr - s->checksum_ptr);
94 s->checksum_ptr= s->buffer;
95 }
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96 s->pos += s->buf_ptr - s->buffer;
97 }
98 s->buf_ptr = s->buffer;
99}
100
101void put_byte(ByteIOContext *s, int b)
102{
103 *(s->buf_ptr)++ = b;
115329f1 104 if (s->buf_ptr >= s->buf_end)
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105 flush_buffer(s);
106}
107
75bdb984 108void put_buffer(ByteIOContext *s, const unsigned char *buf, int size)
de6d9b64 109{
de6d9b64 110 while (size > 0) {
90aa6ace 111 int len = FFMIN(s->buf_end - s->buf_ptr, size);
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112 memcpy(s->buf_ptr, buf, len);
113 s->buf_ptr += len;
114
115329f1 115 if (s->buf_ptr >= s->buf_end)
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116 flush_buffer(s);
117
118 buf += len;
119 size -= len;
120 }
121}
122
123void put_flush_packet(ByteIOContext *s)
124{
125 flush_buffer(s);
126 s->must_flush = 0;
127}
128
bc5c918e 129int64_t url_fseek(ByteIOContext *s, int64_t offset, int whence)
de6d9b64 130{
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131 int64_t offset1;
132 int64_t pos;
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133 int force = whence & AVSEEK_FORCE;
134 whence &= ~AVSEEK_FORCE;
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135
136 if(!s)
137 return AVERROR(EINVAL);
138
139 pos = s->pos - (s->write_flag ? 0 : (s->buf_end - s->buffer));
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140
141 if (whence != SEEK_CUR && whence != SEEK_SET)
8fa36ae0 142 return AVERROR(EINVAL);
115329f1 143
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144 if (whence == SEEK_CUR) {
145 offset1 = pos + (s->buf_ptr - s->buffer);
146 if (offset == 0)
147 return offset1;
148 offset += offset1;
149 }
150 offset1 = offset - pos;
151 if (!s->must_flush &&
b3eab9fb 152 offset1 >= 0 && offset1 <= (s->buf_end - s->buffer)) {
f40d1739
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153 /* can do the seek inside the buffer */
154 s->buf_ptr = s->buffer + offset1;
493f54ad 155 } else if(s->is_streamed && !s->write_flag && offset1 >= 0 &&
7a6fe01f 156 (whence != SEEK_END || force)) {
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157 while(s->pos < offset && !s->eof_reached)
158 fill_buffer(s);
5cb4b82a 159 if (s->eof_reached)
8d5e638f 160 return AVERROR_EOF;
398f5d3f 161 s->buf_ptr = s->buf_end + offset - s->pos;
f40d1739 162 } else {
bc5c918e 163 int64_t res = AVERROR(EPIPE);
68fcdbf1 164
b250f9c6 165#if CONFIG_MUXERS || CONFIG_NETWORK
f40d1739 166 if (s->write_flag) {
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167 flush_buffer(s);
168 s->must_flush = 1;
de6d9b64 169 }
b250f9c6 170#endif /* CONFIG_MUXERS || CONFIG_NETWORK */
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171 if (!s->seek || (res = s->seek(s->opaque, offset, SEEK_SET)) < 0)
172 return res;
39a127bf
BC
173 if (!s->write_flag)
174 s->buf_end = s->buffer;
175 s->buf_ptr = s->buffer;
f40d1739 176 s->pos = offset;
de6d9b64 177 }
f40d1739 178 s->eof_reached = 0;
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179 return offset;
180}
181
bc5c918e 182void url_fskip(ByteIOContext *s, int64_t offset)
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183{
184 url_fseek(s, offset, SEEK_CUR);
185}
186
bc5c918e 187int64_t url_ftell(ByteIOContext *s)
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188{
189 return url_fseek(s, 0, SEEK_CUR);
190}
191
bc5c918e 192int64_t url_fsize(ByteIOContext *s)
a965c478 193{
bc5c918e 194 int64_t size;
115329f1 195
899681cd
BA
196 if(!s)
197 return AVERROR(EINVAL);
198
a965c478 199 if (!s->seek)
4c4ef3db 200 return AVERROR(ENOSYS);
8e287af0
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201 size = s->seek(s->opaque, 0, AVSEEK_SIZE);
202 if(size<0){
8f42f523
RB
203 if ((size = s->seek(s->opaque, -1, SEEK_END)) < 0)
204 return size;
205 size++;
1ae2c5f2 206 s->seek(s->opaque, s->pos, SEEK_SET);
8e287af0 207 }
a965c478
AJ
208 return size;
209}
210
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211int url_feof(ByteIOContext *s)
212{
899681cd
BA
213 if(!s)
214 return 0;
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215 return s->eof_reached;
216}
217
576ae256
MN
218int url_ferror(ByteIOContext *s)
219{
899681cd
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220 if(!s)
221 return 0;
576ae256
MN
222 return s->error;
223}
224
de6d9b64
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225void put_le32(ByteIOContext *s, unsigned int val)
226{
227 put_byte(s, val);
228 put_byte(s, val >> 8);
229 put_byte(s, val >> 16);
230 put_byte(s, val >> 24);
231}
232
233void put_be32(ByteIOContext *s, unsigned int val)
234{
235 put_byte(s, val >> 24);
236 put_byte(s, val >> 16);
237 put_byte(s, val >> 8);
238 put_byte(s, val);
239}
240
3b4b29dc 241void put_strz(ByteIOContext *s, const char *str)
75bdb984
PG
242{
243 if (str)
244 put_buffer(s, (const unsigned char *) str, strlen(str) + 1);
245 else
246 put_byte(s, 0);
247}
248
0c1a9eda 249void put_le64(ByteIOContext *s, uint64_t val)
de6d9b64 250{
0c1a9eda
ZK
251 put_le32(s, (uint32_t)(val & 0xffffffff));
252 put_le32(s, (uint32_t)(val >> 32));
de6d9b64
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253}
254
0c1a9eda 255void put_be64(ByteIOContext *s, uint64_t val)
de6d9b64 256{
0c1a9eda
ZK
257 put_be32(s, (uint32_t)(val >> 32));
258 put_be32(s, (uint32_t)(val & 0xffffffff));
de6d9b64
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259}
260
261void put_le16(ByteIOContext *s, unsigned int val)
262{
263 put_byte(s, val);
264 put_byte(s, val >> 8);
265}
266
267void put_be16(ByteIOContext *s, unsigned int val)
268{
269 put_byte(s, val >> 8);
270 put_byte(s, val);
271}
272
ea395e8c
AJ
273void put_le24(ByteIOContext *s, unsigned int val)
274{
275 put_le16(s, val & 0xffff);
276 put_byte(s, val >> 16);
277}
278
a254c574
MN
279void put_be24(ByteIOContext *s, unsigned int val)
280{
281 put_be16(s, val >> 8);
282 put_byte(s, val);
283}
284
0570bf06 285void put_tag(ByteIOContext *s, const char *tag)
de6d9b64
FB
286{
287 while (*tag) {
288 put_byte(s, *tag++);
289 }
290}
291
292/* Input stream */
293
294static void fill_buffer(ByteIOContext *s)
295{
f5edd874 296 uint8_t *dst= !s->max_packet_size && s->buf_end - s->buffer < s->buffer_size ? s->buf_ptr : s->buffer;
4589dc5c 297 int len= s->buffer_size - (dst - s->buffer);
01d91b9b 298 int max_buffer_size = s->max_packet_size ? s->max_packet_size : IO_BUFFER_SIZE;
4589dc5c
MN
299
300 assert(s->buf_ptr == s->buf_end);
de6d9b64 301
abba3dd1
FB
302 /* no need to do anything if EOF already reached */
303 if (s->eof_reached)
304 return;
ee9f36a8 305
4589dc5c 306 if(s->update_checksum && dst == s->buffer){
0f0680c5
MN
307 if(s->buf_end > s->checksum_ptr)
308 s->checksum= s->update_checksum(s->checksum, s->checksum_ptr, s->buf_end - s->checksum_ptr);
ee9f36a8
MN
309 s->checksum_ptr= s->buffer;
310 }
311
01d91b9b
TH
312 /* make buffer smaller in case it ended up large after probing */
313 if (s->buffer_size > max_buffer_size) {
314 url_setbufsize(s, max_buffer_size);
315
316 s->checksum_ptr = dst = s->buffer;
317 len = s->buffer_size;
318 }
319
602dd8f6 320 if(s->read_packet)
4589dc5c
MN
321 len = s->read_packet(s->opaque, dst, len);
322 else
323 len = 0;
abba3dd1
FB
324 if (len <= 0) {
325 /* do not modify buffer if EOF reached so that a seek back can
326 be done without rereading data */
de6d9b64 327 s->eof_reached = 1;
5f097703
AB
328 if(len<0)
329 s->error= len;
abba3dd1
FB
330 } else {
331 s->pos += len;
4589dc5c
MN
332 s->buf_ptr = dst;
333 s->buf_end = dst + len;
de6d9b64
FB
334 }
335}
336
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DB
337unsigned long ff_crc04C11DB7_update(unsigned long checksum, const uint8_t *buf,
338 unsigned int len)
339{
3abe5fbd 340 return av_crc(av_crc_get_table(AV_CRC_32_IEEE), checksum, buf, len);
992e78f5
BC
341}
342
7f37f568
DB
343unsigned long get_checksum(ByteIOContext *s)
344{
ee9f36a8 345 s->checksum= s->update_checksum(s->checksum, s->checksum_ptr, s->buf_ptr - s->checksum_ptr);
465e1dad 346 s->update_checksum= NULL;
ee9f36a8
MN
347 return s->checksum;
348}
349
7f37f568
DB
350void init_checksum(ByteIOContext *s,
351 unsigned long (*update_checksum)(unsigned long c, const uint8_t *p, unsigned int len),
352 unsigned long checksum)
353{
ee9f36a8 354 s->update_checksum= update_checksum;
465e1dad 355 if(s->update_checksum){
ccb15994 356 s->checksum= checksum;
465e1dad
MN
357 s->checksum_ptr= s->buf_ptr;
358 }
ee9f36a8
MN
359}
360
abba3dd1 361/* XXX: put an inline version */
de6d9b64
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362int get_byte(ByteIOContext *s)
363{
364 if (s->buf_ptr < s->buf_end) {
365 return *s->buf_ptr++;
366 } else {
367 fill_buffer(s);
368 if (s->buf_ptr < s->buf_end)
369 return *s->buf_ptr++;
370 else
371 return 0;
372 }
373}
374
abba3dd1
FB
375int url_fgetc(ByteIOContext *s)
376{
377 if (s->buf_ptr < s->buf_end) {
378 return *s->buf_ptr++;
379 } else {
380 fill_buffer(s);
381 if (s->buf_ptr < s->buf_end)
382 return *s->buf_ptr++;
383 else
384 return URL_EOF;
385 }
386}
387
de6d9b64
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388int get_buffer(ByteIOContext *s, unsigned char *buf, int size)
389{
390 int len, size1;
391
392 size1 = size;
393 while (size > 0) {
394 len = s->buf_end - s->buf_ptr;
395 if (len > size)
396 len = size;
397 if (len == 0) {
3e2b6358 398 if(size > s->buffer_size && !s->update_checksum){
602dd8f6 399 if(s->read_packet)
2d89f334 400 len = s->read_packet(s->opaque, buf, size);
3e2b6358
MN
401 if (len <= 0) {
402 /* do not modify buffer if EOF reached so that a seek back can
403 be done without rereading data */
404 s->eof_reached = 1;
405 if(len<0)
406 s->error= len;
407 break;
408 } else {
409 s->pos += len;
410 size -= len;
411 buf += len;
412 s->buf_ptr = s->buffer;
413 s->buf_end = s->buffer/* + len*/;
414 }
415 }else{
416 fill_buffer(s);
417 len = s->buf_end - s->buf_ptr;
418 if (len == 0)
419 break;
420 }
de6d9b64
FB
421 } else {
422 memcpy(buf, s->buf_ptr, len);
423 buf += len;
424 s->buf_ptr += len;
425 size -= len;
426 }
427 }
7f7686df
RD
428 if (size1 == size) {
429 if (url_ferror(s)) return url_ferror(s);
430 if (url_feof(s)) return AVERROR_EOF;
431 }
de6d9b64
FB
432 return size1 - size;
433}
434
e15dec10
LS
435int get_partial_buffer(ByteIOContext *s, unsigned char *buf, int size)
436{
437 int len;
115329f1 438
0ecca7a4
MN
439 if(size<0)
440 return -1;
e15dec10
LS
441
442 len = s->buf_end - s->buf_ptr;
443 if (len == 0) {
444 fill_buffer(s);
445 len = s->buf_end - s->buf_ptr;
446 }
447 if (len > size)
448 len = size;
449 memcpy(buf, s->buf_ptr, len);
450 s->buf_ptr += len;
7f7686df
RD
451 if (!len) {
452 if (url_ferror(s)) return url_ferror(s);
453 if (url_feof(s)) return AVERROR_EOF;
454 }
e15dec10
LS
455 return len;
456}
457
de6d9b64
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458unsigned int get_le16(ByteIOContext *s)
459{
460 unsigned int val;
461 val = get_byte(s);
462 val |= get_byte(s) << 8;
463 return val;
464}
465
ea395e8c
AJ
466unsigned int get_le24(ByteIOContext *s)
467{
468 unsigned int val;
469 val = get_le16(s);
470 val |= get_byte(s) << 16;
471 return val;
472}
473
de6d9b64
FB
474unsigned int get_le32(ByteIOContext *s)
475{
476 unsigned int val;
a254c574
MN
477 val = get_le16(s);
478 val |= get_le16(s) << 16;
de6d9b64
FB
479 return val;
480}
481
0c1a9eda 482uint64_t get_le64(ByteIOContext *s)
de6d9b64 483{
0c1a9eda
ZK
484 uint64_t val;
485 val = (uint64_t)get_le32(s);
486 val |= (uint64_t)get_le32(s) << 32;
de6d9b64
FB
487 return val;
488}
489
490unsigned int get_be16(ByteIOContext *s)
491{
492 unsigned int val;
493 val = get_byte(s) << 8;
494 val |= get_byte(s);
495 return val;
496}
497
a254c574 498unsigned int get_be24(ByteIOContext *s)
de6d9b64
FB
499{
500 unsigned int val;
a254c574 501 val = get_be16(s) << 8;
de6d9b64
FB
502 val |= get_byte(s);
503 return val;
504}
a254c574
MN
505unsigned int get_be32(ByteIOContext *s)
506{
507 unsigned int val;
508 val = get_be16(s) << 16;
509 val |= get_be16(s);
510 return val;
511}
de6d9b64 512
3b4b29dc 513char *get_strz(ByteIOContext *s, char *buf, int maxlen)
75bdb984
PG
514{
515 int i = 0;
516 char c;
517
518 while ((c = get_byte(s))) {
519 if (i < maxlen-1)
520 buf[i++] = c;
521 }
115329f1 522
75bdb984
PG
523 buf[i] = 0; /* Ensure null terminated, but may be truncated */
524
525 return buf;
526}
527
0c1a9eda 528uint64_t get_be64(ByteIOContext *s)
de6d9b64 529{
0c1a9eda
ZK
530 uint64_t val;
531 val = (uint64_t)get_be32(s) << 32;
532 val |= (uint64_t)get_be32(s);
de6d9b64
FB
533 return val;
534}
535
7798b42d 536uint64_t ff_get_v(ByteIOContext *bc){
897d3eef
KS
537 uint64_t val = 0;
538 int tmp;
539
540 do{
541 tmp = get_byte(bc);
542 val= (val<<7) + (tmp&127);
543 }while(tmp&128);
544 return val;
545}
546
899681cd 547int url_fdopen(ByteIOContext **s, URLContext *h)
de6d9b64 548{
0c1a9eda 549 uint8_t *buffer;
abba3dd1 550 int buffer_size, max_packet_size;
de6d9b64 551
abba3dd1
FB
552 max_packet_size = url_get_max_packet_size(h);
553 if (max_packet_size) {
554 buffer_size = max_packet_size; /* no need to bufferize more than one packet */
555 } else {
556 buffer_size = IO_BUFFER_SIZE;
557 }
1ea4f593 558 buffer = av_malloc(buffer_size);
de6d9b64 559 if (!buffer)
8fa36ae0 560 return AVERROR(ENOMEM);
de6d9b64 561
899681cd
BA
562 *s = av_mallocz(sizeof(ByteIOContext));
563 if(!*s) {
564 av_free(buffer);
565 return AVERROR(ENOMEM);
566 }
567
568 if (init_put_byte(*s, buffer, buffer_size,
ac9fe33d 569 (h->flags & URL_WRONLY || h->flags & URL_RDWR), h,
004050ee 570 url_read, url_write, url_seek) < 0) {
1ea4f593 571 av_free(buffer);
899681cd 572 av_freep(s);
6f3e0b21 573 return AVERROR(EIO);
de6d9b64 574 }
899681cd
BA
575 (*s)->is_streamed = h->is_streamed;
576 (*s)->max_packet_size = max_packet_size;
e7e4810a 577 if(h->prot) {
502bdf68 578 (*s)->read_pause = (int (*)(void *, int))h->prot->url_read_pause;
bc5c918e 579 (*s)->read_seek = (int64_t (*)(void *, int, int64_t, int))h->prot->url_read_seek;
e7e4810a 580 }
de6d9b64
FB
581 return 0;
582}
583
de6d9b64
FB
584int url_setbufsize(ByteIOContext *s, int buf_size)
585{
0c1a9eda 586 uint8_t *buffer;
1ea4f593 587 buffer = av_malloc(buf_size);
de6d9b64 588 if (!buffer)
8fa36ae0 589 return AVERROR(ENOMEM);
de6d9b64 590
1ea4f593 591 av_free(s->buffer);
de6d9b64
FB
592 s->buffer = buffer;
593 s->buffer_size = buf_size;
594 s->buf_ptr = buffer;
770d9daf
BA
595 url_resetbuf(s, s->write_flag ? URL_WRONLY : URL_RDONLY);
596 return 0;
597}
598
08580cb0 599#if LIBAVFORMAT_VERSION_MAJOR < 53
770d9daf 600int url_resetbuf(ByteIOContext *s, int flags)
08580cb0
BF
601#else
602static int url_resetbuf(ByteIOContext *s, int flags)
603#endif
770d9daf 604{
08580cb0 605#if LIBAVFORMAT_VERSION_MAJOR < 53
770d9daf
BA
606 URLContext *h = s->opaque;
607 if ((flags & URL_RDWR) || (h && h->flags != flags && !h->flags & URL_RDWR))
608 return AVERROR(EINVAL);
08580cb0
BF
609#else
610 assert(flags == URL_WRONLY || flags == URL_RDONLY);
611#endif
770d9daf
BA
612
613 if (flags & URL_WRONLY) {
614 s->buf_end = s->buffer + s->buffer_size;
615 s->write_flag = 1;
616 } else {
617 s->buf_end = s->buffer;
618 s->write_flag = 0;
619 }
de6d9b64
FB
620 return 0;
621}
622
01d91b9b
TH
623int ff_rewind_with_probe_data(ByteIOContext *s, unsigned char *buf, int buf_size)
624{
625 int64_t buffer_start;
626 int buffer_size;
627 int overlap, new_size;
628
629 if (s->write_flag)
630 return AVERROR(EINVAL);
631
632 buffer_size = s->buf_end - s->buffer;
633
634 /* the buffers must touch or overlap */
635 if ((buffer_start = s->pos - buffer_size) > buf_size)
636 return AVERROR(EINVAL);
637
638 overlap = buf_size - buffer_start;
639 new_size = buf_size + buffer_size - overlap;
640
641 if (new_size > buf_size) {
642 if (!(buf = av_realloc(buf, new_size)))
643 return AVERROR(ENOMEM);
644
645 memcpy(buf + buf_size, s->buffer + overlap, buffer_size - overlap);
646 buf_size = new_size;
647 }
648
649 av_free(s->buffer);
650 s->buf_ptr = s->buffer = buf;
651 s->pos = s->buffer_size = buf_size;
652 s->buf_end = s->buf_ptr + buf_size;
653 s->eof_reached = 0;
654 s->must_flush = 0;
655
656 return 0;
657}
658
899681cd 659int url_fopen(ByteIOContext **s, const char *filename, int flags)
de6d9b64
FB
660{
661 URLContext *h;
662 int err;
663
664 err = url_open(&h, filename, flags);
665 if (err < 0)
666 return err;
667 err = url_fdopen(s, h);
668 if (err < 0) {
669 url_close(h);
670 return err;
671 }
672 return 0;
673}
674
675int url_fclose(ByteIOContext *s)
676{
677 URLContext *h = s->opaque;
115329f1 678
1ea4f593 679 av_free(s->buffer);
899681cd 680 av_free(s);
de6d9b64
FB
681 return url_close(h);
682}
683
684URLContext *url_fileno(ByteIOContext *s)
685{
686 return s->opaque;
687}
688
b250f9c6 689#if CONFIG_MUXERS
abba3dd1
FB
690int url_fprintf(ByteIOContext *s, const char *fmt, ...)
691{
692 va_list ap;
693 char buf[4096];
694 int ret;
695
696 va_start(ap, fmt);
697 ret = vsnprintf(buf, sizeof(buf), fmt, ap);
698 va_end(ap);
699 put_buffer(s, buf, strlen(buf));
700 return ret;
701}
a9e35095 702#endif //CONFIG_MUXERS
abba3dd1 703
abba3dd1
FB
704char *url_fgets(ByteIOContext *s, char *buf, int buf_size)
705{
706 int c;
707 char *q;
708
709 c = url_fgetc(s);
710 if (c == EOF)
711 return NULL;
712 q = buf;
713 for(;;) {
714 if (c == EOF || c == '\n')
715 break;
716 if ((q - buf) < buf_size - 1)
717 *q++ = c;
718 c = url_fgetc(s);
719 }
720 if (buf_size > 0)
721 *q = '\0';
722 return buf;
723}
724
abba3dd1
FB
725int url_fget_max_packet_size(ByteIOContext *s)
726{
727 return s->max_packet_size;
728}
729
502bdf68 730int av_url_read_fpause(ByteIOContext *s, int pause)
e7e4810a
BA
731{
732 if (!s->read_pause)
733 return AVERROR(ENOSYS);
502bdf68 734 return s->read_pause(s->opaque, pause);
e7e4810a
BA
735}
736
7f37f568
DB
737int64_t av_url_read_fseek(ByteIOContext *s, int stream_index,
738 int64_t timestamp, int flags)
e7e4810a
BA
739{
740 URLContext *h = s->opaque;
bc5c918e 741 int64_t ret;
e7e4810a
BA
742 if (!s->read_seek)
743 return AVERROR(ENOSYS);
744 ret = s->read_seek(h, stream_index, timestamp, flags);
745 if(ret >= 0) {
c007c687 746 int64_t pos;
e7e4810a 747 s->buf_ptr = s->buf_end; // Flush buffer
c007c687
HC
748 pos = s->seek(h, 0, SEEK_CUR);
749 if (pos >= 0)
750 s->pos = pos;
751 else if (pos != AVERROR(ENOSYS))
752 ret = pos;
e7e4810a
BA
753 }
754 return ret;
755}
756
8fa641f8 757/* url_open_dyn_buf and url_close_dyn_buf are used in rtp.c to send a response
b250f9c6
AJ
758 * back to the server even if CONFIG_MUXERS is false. */
759#if CONFIG_MUXERS || CONFIG_NETWORK
de6d9b64 760/* buffer handling */
899681cd 761int url_open_buf(ByteIOContext **s, uint8_t *buf, int buf_size, int flags)
de6d9b64 762{
899681cd
BA
763 int ret;
764 *s = av_mallocz(sizeof(ByteIOContext));
765 if(!*s)
766 return AVERROR(ENOMEM);
767 ret = init_put_byte(*s, buf, buf_size,
768 (flags & URL_WRONLY || flags & URL_RDWR),
769 NULL, NULL, NULL, NULL);
770 if(ret != 0)
771 av_freep(s);
772 return ret;
de6d9b64
FB
773}
774
de6d9b64
FB
775int url_close_buf(ByteIOContext *s)
776{
abba3dd1 777 put_flush_packet(s);
de6d9b64
FB
778 return s->buf_ptr - s->buffer;
779}
abba3dd1
FB
780
781/* output in a dynamic buffer */
782
783typedef struct DynBuffer {
784 int pos, size, allocated_size;
0c1a9eda 785 uint8_t *buffer;
abba3dd1 786 int io_buffer_size;
0c1a9eda 787 uint8_t io_buffer[1];
abba3dd1
FB
788} DynBuffer;
789
576ae256 790static int dyn_buf_write(void *opaque, uint8_t *buf, int buf_size)
abba3dd1
FB
791{
792 DynBuffer *d = opaque;
6bc03a69 793 unsigned new_size, new_allocated_size;
115329f1 794
abba3dd1
FB
795 /* reallocate buffer if needed */
796 new_size = d->pos + buf_size;
797 new_allocated_size = d->allocated_size;
568e18b1
MN
798 if(new_size < d->pos || new_size > INT_MAX/2)
799 return -1;
abba3dd1
FB
800 while (new_size > new_allocated_size) {
801 if (!new_allocated_size)
802 new_allocated_size = new_size;
803 else
115329f1 804 new_allocated_size += new_allocated_size / 2 + 1;
abba3dd1 805 }
115329f1 806
abba3dd1 807 if (new_allocated_size > d->allocated_size) {
b88ba823
MH
808 d->buffer = av_realloc(d->buffer, new_allocated_size);
809 if(d->buffer == NULL)
7ce820ef 810 return AVERROR(ENOMEM);
abba3dd1
FB
811 d->allocated_size = new_allocated_size;
812 }
813 memcpy(d->buffer + d->pos, buf, buf_size);
814 d->pos = new_size;
815 if (d->pos > d->size)
816 d->size = d->pos;
576ae256 817 return buf_size;
abba3dd1
FB
818}
819
576ae256 820static int dyn_packet_buf_write(void *opaque, uint8_t *buf, int buf_size)
abba3dd1
FB
821{
822 unsigned char buf1[4];
576ae256 823 int ret;
abba3dd1
FB
824
825 /* packetized write: output the header */
aa805f94 826 AV_WB32(buf1, buf_size);
576ae256
MN
827 ret= dyn_buf_write(opaque, buf1, 4);
828 if(ret < 0)
829 return ret;
abba3dd1
FB
830
831 /* then the data */
576ae256 832 return dyn_buf_write(opaque, buf, buf_size);
abba3dd1
FB
833}
834
bc5c918e 835static int64_t dyn_buf_seek(void *opaque, int64_t offset, int whence)
abba3dd1
FB
836{
837 DynBuffer *d = opaque;
838
839 if (whence == SEEK_CUR)
840 offset += d->pos;
841 else if (whence == SEEK_END)
842 offset += d->size;
843 if (offset < 0 || offset > 0x7fffffffLL)
844 return -1;
845 d->pos = offset;
846 return 0;
847}
848
899681cd 849static int url_open_dyn_buf_internal(ByteIOContext **s, int max_packet_size)
abba3dd1
FB
850{
851 DynBuffer *d;
2bdaf78c 852 int ret;
0c5a43d6 853 unsigned io_buffer_size = max_packet_size ? max_packet_size : 1024;
115329f1 854
568e18b1
MN
855 if(sizeof(DynBuffer) + io_buffer_size < io_buffer_size)
856 return -1;
dc2c2eea 857 d = av_mallocz(sizeof(DynBuffer) + io_buffer_size);
abba3dd1 858 if (!d)
0e7ceb24 859 return AVERROR(ENOMEM);
899681cd
BA
860 *s = av_mallocz(sizeof(ByteIOContext));
861 if(!*s) {
862 av_free(d);
863 return AVERROR(ENOMEM);
864 }
abba3dd1 865 d->io_buffer_size = io_buffer_size;
899681cd 866 ret = init_put_byte(*s, d->io_buffer, io_buffer_size,
115329f1
DB
867 1, d, NULL,
868 max_packet_size ? dyn_packet_buf_write : dyn_buf_write,
abba3dd1
FB
869 max_packet_size ? NULL : dyn_buf_seek);
870 if (ret == 0) {
899681cd
BA
871 (*s)->max_packet_size = max_packet_size;
872 } else {
873 av_free(d);
874 av_freep(s);
abba3dd1
FB
875 }
876 return ret;
877}
878
899681cd 879int url_open_dyn_buf(ByteIOContext **s)
abba3dd1
FB
880{
881 return url_open_dyn_buf_internal(s, 0);
882}
883
899681cd 884int url_open_dyn_packet_buf(ByteIOContext **s, int max_packet_size)
abba3dd1
FB
885{
886 if (max_packet_size <= 0)
887 return -1;
888 return url_open_dyn_buf_internal(s, max_packet_size);
889}
890
0c1a9eda 891int url_close_dyn_buf(ByteIOContext *s, uint8_t **pbuffer)
abba3dd1
FB
892{
893 DynBuffer *d = s->opaque;
894 int size;
895
896 put_flush_packet(s);
897
898 *pbuffer = d->buffer;
899 size = d->size;
900 av_free(d);
899681cd 901 av_free(s);
abba3dd1
FB
902 return size;
903}
8fa641f8 904#endif /* CONFIG_MUXERS || CONFIG_NETWORK */