FFmpeg coverage

Line	Branch	Exec	Source
1			/*
2			* Input async protocol.
3			* Copyright (c) 2015 Zhang Rui <bbcallen@gmail.com>
4			*
5			* This file is part of FFmpeg.
6			*
7			* FFmpeg is free software; you can redistribute it and/or
8			* modify it under the terms of the GNU Lesser General Public
9			* License as published by the Free Software Foundation; either
10			* version 2.1 of the License, or (at your option) any later version.
11			*
12			* FFmpeg is distributed in the hope that it will be useful,
13			* but WITHOUT ANY WARRANTY; without even the implied warranty of
14			* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15			* Lesser General Public License for more details.
16			*
17			* You should have received a copy of the GNU Lesser General Public
18			* License along with FFmpeg; if not, write to the Free Software
19			* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
20			*
21			* Based on libavformat/cache.c by Michael Niedermayer
22			*/
23
24			/**
25			* @TODO
26			* support timeout
27			* support work with concatdec, hls
28			*/
29
30			#include "libavutil/avassert.h"
31			#include "libavutil/avstring.h"
32			#include "libavutil/error.h"
33			#include "libavutil/fifo.h"
34			#include "libavutil/log.h"
35			#include "libavutil/opt.h"
36			#include "libavutil/thread.h"
37			#include "url.h"
38			#include <stdint.h>
39
40			#if HAVE_UNISTD_H
41			#include <unistd.h>
42			#endif
43
44			#define BUFFER_CAPACITY (4 * 1024 * 1024)
45			#define READ_BACK_CAPACITY (4 * 1024 * 1024)
46			#define SHORT_SEEK_THRESHOLD (256 * 1024)
47
48			typedef struct RingBuffer
49			{
50			AVFifo *fifo;
51			int read_back_capacity;
52
53			int read_pos;
54			} RingBuffer;
55
56			typedef struct AsyncContext {
57			AVClass *class;
58			URLContext *inner;
59
60			int seek_request;
61			int64_t seek_pos;
62			int seek_whence;
63			int seek_completed;
64			int64_t seek_ret;
65
66			int inner_io_error;
67			int io_error;
68			int io_eof_reached;
69
70			int64_t logical_pos;
71			int64_t logical_size;
72			RingBuffer ring;
73
74			pthread_cond_t cond_wakeup_main;
75			pthread_cond_t cond_wakeup_background;
76			pthread_mutex_t mutex;
77			pthread_t async_buffer_thread;
78
79			int abort_request;
80			AVIOInterruptCB interrupt_callback;
81			} AsyncContext;
82
83		✗	static int ring_init(RingBuffer *ring, unsigned int capacity, int read_back_capacity)
84			{
85		✗	memset(ring, 0, sizeof(RingBuffer));
86		✗	ring->fifo = av_fifo_alloc2(capacity + read_back_capacity, 1, 0);
87		✗	if (!ring->fifo)
88		✗	return AVERROR(ENOMEM);
89
90		✗	ring->read_back_capacity = read_back_capacity;
91		✗	return 0;
92			}
93
94		✗	static void ring_destroy(RingBuffer *ring)
95			{
96		✗	av_fifo_freep2(&ring->fifo);
97		✗	}
98
99		✗	static void ring_reset(RingBuffer *ring)
100			{
101		✗	av_fifo_reset2(ring->fifo);
102		✗	ring->read_pos = 0;
103		✗	}
104
105		✗	static int ring_size(RingBuffer *ring)
106			{
107		✗	return av_fifo_can_read(ring->fifo) - ring->read_pos;
108			}
109
110		✗	static int ring_space(RingBuffer *ring)
111			{
112		✗	return av_fifo_can_write(ring->fifo);
113			}
114
115		✗	static int ring_read(RingBuffer *ring, void *dest, int buf_size)
116			{
117		✗	int ret = 0;
118
119			av_assert2(buf_size <= ring_size(ring));
120		✗	if (dest)
121		✗	ret = av_fifo_peek(ring->fifo, dest, buf_size, ring->read_pos);
122		✗	ring->read_pos += buf_size;
123
124		✗	if (ring->read_pos > ring->read_back_capacity) {
125		✗	av_fifo_drain2(ring->fifo, ring->read_pos - ring->read_back_capacity);
126		✗	ring->read_pos = ring->read_back_capacity;
127			}
128
129		✗	return ret;
130			}
131
132		✗	static int wrapped_url_read(void *src, void *dst, size_t *size)
133			{
134		✗	URLContext *h = src;
135		✗	AsyncContext *c = h->priv_data;
136			int ret;
137
138		✗	ret = ffurl_read(c->inner, dst, *size);
139		✗	*size = ret > 0 ? ret : 0;
140		✗	c->inner_io_error = ret < 0 ? ret : 0;
141
142		✗	return c->inner_io_error;
143			}
144
145		✗	static int ring_write(RingBuffer *ring, URLContext *h, size_t size)
146			{
147			int ret;
148
149			av_assert2(size <= ring_space(ring));
150		✗	ret = av_fifo_write_from_cb(ring->fifo, wrapped_url_read, h, &size);
151		✗	if (ret < 0)
152		✗	return ret;
153
154		✗	return size;
155			}
156
157		✗	static int ring_size_of_read_back(RingBuffer *ring)
158			{
159		✗	return ring->read_pos;
160			}
161
162		✗	static int ring_drain(RingBuffer *ring, int offset)
163			{
164			av_assert2(offset >= -ring_size_of_read_back(ring));
165			av_assert2(offset <= ring_size(ring));
166		✗	ring->read_pos += offset;
167		✗	return 0;
168			}
169
170		✗	static int async_check_interrupt(void *arg)
171			{
172		✗	URLContext *h = arg;
173		✗	AsyncContext *c = h->priv_data;
174
175		✗	if (c->abort_request)
176		✗	return 1;
177
178		✗	if (ff_check_interrupt(&c->interrupt_callback))
179		✗	c->abort_request = 1;
180
181		✗	return c->abort_request;
182			}
183
184		✗	static void *async_buffer_task(void *arg)
185			{
186		✗	URLContext *h = arg;
187		✗	AsyncContext *c = h->priv_data;
188		✗	RingBuffer *ring = &c->ring;
189		✗	int ret = 0;
190			int64_t seek_ret;
191
192		✗	ff_thread_setname("async");
193
194		✗	while (1) {
195			int fifo_space, to_copy;
196
197		✗	pthread_mutex_lock(&c->mutex);
198		✗	if (async_check_interrupt(h)) {
199		✗	c->io_eof_reached = 1;
200		✗	c->io_error = AVERROR_EXIT;
201		✗	pthread_cond_signal(&c->cond_wakeup_main);
202		✗	pthread_mutex_unlock(&c->mutex);
203		✗	break;
204			}
205
206		✗	if (c->seek_request) {
207		✗	seek_ret = ffurl_seek(c->inner, c->seek_pos, c->seek_whence);
208		✗	if (seek_ret >= 0) {
209		✗	c->io_eof_reached = 0;
210		✗	c->io_error = 0;
211		✗	ring_reset(ring);
212			}
213
214		✗	c->seek_completed = 1;
215		✗	c->seek_ret = seek_ret;
216		✗	c->seek_request = 0;
217
218
219		✗	pthread_cond_signal(&c->cond_wakeup_main);
220		✗	pthread_mutex_unlock(&c->mutex);
221		✗	continue;
222			}
223
224		✗	fifo_space = ring_space(ring);
225		✗	if (c->io_eof_reached || fifo_space <= 0) {
226		✗	pthread_cond_signal(&c->cond_wakeup_main);
227		✗	pthread_cond_wait(&c->cond_wakeup_background, &c->mutex);
228		✗	pthread_mutex_unlock(&c->mutex);
229		✗	continue;
230			}
231		✗	pthread_mutex_unlock(&c->mutex);
232
233		✗	to_copy = FFMIN(4096, fifo_space);
234		✗	ret = ring_write(ring, h, to_copy);
235
236		✗	pthread_mutex_lock(&c->mutex);
237		✗	if (ret <= 0) {
238		✗	c->io_eof_reached = 1;
239		✗	if (c->inner_io_error < 0)
240		✗	c->io_error = c->inner_io_error;
241			}
242
243		✗	pthread_cond_signal(&c->cond_wakeup_main);
244		✗	pthread_mutex_unlock(&c->mutex);
245			}
246
247		✗	return NULL;
248			}
249
250		✗	static int async_open(URLContext *h, const char *arg, int flags, AVDictionary **options)
251			{
252		✗	AsyncContext *c = h->priv_data;
253			int ret;
254		✗	AVIOInterruptCB interrupt_callback = {.callback = async_check_interrupt, .opaque = h};
255
256		✗	av_strstart(arg, "async:", &arg);
257
258		✗	ret = ring_init(&c->ring, BUFFER_CAPACITY, READ_BACK_CAPACITY);
259		✗	if (ret < 0)
260		✗	goto fifo_fail;
261
262			/* wrap interrupt callback */
263		✗	c->interrupt_callback = h->interrupt_callback;
264		✗	ret = ffurl_open_whitelist(&c->inner, arg, flags, &interrupt_callback, options, h->protocol_whitelist, h->protocol_blacklist, h);
265		✗	if (ret != 0) {
266		✗	av_log(h, AV_LOG_ERROR, "ffurl_open failed : %s, %s\n", av_err2str(ret), arg);
267		✗	goto url_fail;
268			}
269
270		✗	c->logical_size = ffurl_size(c->inner);
271		✗	h->is_streamed = c->inner->is_streamed;
272
273		✗	ret = pthread_mutex_init(&c->mutex, NULL);
274		✗	if (ret != 0) {
275		✗	ret = AVERROR(ret);
276		✗	av_log(h, AV_LOG_ERROR, "pthread_mutex_init failed : %s\n", av_err2str(ret));
277		✗	goto mutex_fail;
278			}
279
280		✗	ret = pthread_cond_init(&c->cond_wakeup_main, NULL);
281		✗	if (ret != 0) {
282		✗	ret = AVERROR(ret);
283		✗	av_log(h, AV_LOG_ERROR, "pthread_cond_init failed : %s\n", av_err2str(ret));
284		✗	goto cond_wakeup_main_fail;
285			}
286
287		✗	ret = pthread_cond_init(&c->cond_wakeup_background, NULL);
288		✗	if (ret != 0) {
289		✗	ret = AVERROR(ret);
290		✗	av_log(h, AV_LOG_ERROR, "pthread_cond_init failed : %s\n", av_err2str(ret));
291		✗	goto cond_wakeup_background_fail;
292			}
293
294		✗	ret = pthread_create(&c->async_buffer_thread, NULL, async_buffer_task, h);
295		✗	if (ret) {
296		✗	ret = AVERROR(ret);
297		✗	av_log(h, AV_LOG_ERROR, "pthread_create failed : %s\n", av_err2str(ret));
298		✗	goto thread_fail;
299			}
300
301		✗	return 0;
302
303		✗	thread_fail:
304		✗	pthread_cond_destroy(&c->cond_wakeup_background);
305		✗	cond_wakeup_background_fail:
306		✗	pthread_cond_destroy(&c->cond_wakeup_main);
307		✗	cond_wakeup_main_fail:
308		✗	pthread_mutex_destroy(&c->mutex);
309		✗	mutex_fail:
310		✗	ffurl_closep(&c->inner);
311		✗	url_fail:
312		✗	ring_destroy(&c->ring);
313		✗	fifo_fail:
314		✗	return ret;
315			}
316
317		✗	static int async_close(URLContext *h)
318			{
319		✗	AsyncContext *c = h->priv_data;
320			int ret;
321
322		✗	pthread_mutex_lock(&c->mutex);
323		✗	c->abort_request = 1;
324		✗	pthread_cond_signal(&c->cond_wakeup_background);
325		✗	pthread_mutex_unlock(&c->mutex);
326
327		✗	ret = pthread_join(c->async_buffer_thread, NULL);
328		✗	if (ret != 0)
329		✗	av_log(h, AV_LOG_ERROR, "pthread_join(): %s\n", av_err2str(ret));
330
331		✗	pthread_cond_destroy(&c->cond_wakeup_background);
332		✗	pthread_cond_destroy(&c->cond_wakeup_main);
333		✗	pthread_mutex_destroy(&c->mutex);
334		✗	ffurl_closep(&c->inner);
335		✗	ring_destroy(&c->ring);
336
337		✗	return 0;
338			}
339
340		✗	static int async_read_internal(URLContext *h, void *dest, int size)
341			{
342		✗	AsyncContext *c = h->priv_data;
343		✗	RingBuffer *ring = &c->ring;
344		✗	int read_complete = !dest;
345		✗	int to_read = size;
346		✗	int ret = 0;
347
348		✗	pthread_mutex_lock(&c->mutex);
349
350		✗	while (to_read > 0) {
351			int fifo_size, to_copy;
352		✗	if (async_check_interrupt(h)) {
353		✗	ret = AVERROR_EXIT;
354		✗	break;
355			}
356		✗	fifo_size = ring_size(ring);
357		✗	to_copy = FFMIN(to_read, fifo_size);
358		✗	if (to_copy > 0) {
359		✗	ring_read(ring, dest, to_copy);
360		✗	if (dest)
361		✗	dest = (uint8_t *)dest + to_copy;
362		✗	c->logical_pos += to_copy;
363		✗	to_read -= to_copy;
364		✗	ret = size - to_read;
365
366		✗	if (to_read <= 0 || !read_complete)
367			break;
368		✗	} else if (c->io_eof_reached) {
369		✗	if (ret <= 0) {
370		✗	if (c->io_error)
371		✗	ret = c->io_error;
372			else
373		✗	ret = AVERROR_EOF;
374			}
375		✗	break;
376			}
377		✗	pthread_cond_signal(&c->cond_wakeup_background);
378		✗	pthread_cond_wait(&c->cond_wakeup_main, &c->mutex);
379			}
380
381		✗	pthread_cond_signal(&c->cond_wakeup_background);
382		✗	pthread_mutex_unlock(&c->mutex);
383
384		✗	return ret;
385			}
386
387		✗	static int async_read(URLContext *h, unsigned char *buf, int size)
388			{
389		✗	return async_read_internal(h, buf, size);
390			}
391
392		✗	static int64_t async_seek(URLContext *h, int64_t pos, int whence)
393			{
394		✗	AsyncContext *c = h->priv_data;
395		✗	RingBuffer *ring = &c->ring;
396			int64_t ret;
397			int64_t new_logical_pos;
398			int fifo_size;
399			int fifo_size_of_read_back;
400
401		✗	if (whence == AVSEEK_SIZE) {
402		✗	av_log(h, AV_LOG_TRACE, "async_seek: AVSEEK_SIZE: %"PRId64"\n", (int64_t)c->logical_size);
403		✗	return c->logical_size;
404		✗	} else if (whence == SEEK_CUR) {
405		✗	av_log(h, AV_LOG_TRACE, "async_seek: %"PRId64"\n", pos);
406		✗	new_logical_pos = pos + c->logical_pos;
407		✗	} else if (whence == SEEK_SET){
408		✗	av_log(h, AV_LOG_TRACE, "async_seek: %"PRId64"\n", pos);
409		✗	new_logical_pos = pos;
410			} else {
411		✗	return AVERROR(EINVAL);
412			}
413		✗	if (new_logical_pos < 0)
414		✗	return AVERROR(EINVAL);
415
416		✗	fifo_size = ring_size(ring);
417		✗	fifo_size_of_read_back = ring_size_of_read_back(ring);
418		✗	if (new_logical_pos == c->logical_pos) {
419			/* current position */
420		✗	return c->logical_pos;
421		✗	} else if ((new_logical_pos >= (c->logical_pos - fifo_size_of_read_back)) &&
422		✗	(new_logical_pos < (c->logical_pos + fifo_size + SHORT_SEEK_THRESHOLD))) {
423		✗	int pos_delta = (int)(new_logical_pos - c->logical_pos);
424			/* fast seek */
425		✗	av_log(h, AV_LOG_TRACE, "async_seek: fask_seek %"PRId64" from %d dist:%d/%d\n",
426		✗	new_logical_pos, (int)c->logical_pos,
427		✗	(int)(new_logical_pos - c->logical_pos), fifo_size);
428
429		✗	if (pos_delta > 0) {
430			// fast seek forwards
431		✗	async_read_internal(h, NULL, pos_delta);
432			} else {
433			// fast seek backwards
434		✗	ring_drain(ring, pos_delta);
435		✗	c->logical_pos = new_logical_pos;
436			}
437
438		✗	return c->logical_pos;
439		✗	} else if (c->logical_size <= 0) {
440			/* can not seek */
441		✗	return AVERROR(EINVAL);
442		✗	} else if (new_logical_pos > c->logical_size) {
443			/* beyond end */
444		✗	return AVERROR(EINVAL);
445			}
446
447		✗	pthread_mutex_lock(&c->mutex);
448
449		✗	c->seek_request = 1;
450		✗	c->seek_pos = new_logical_pos;
451		✗	c->seek_whence = SEEK_SET;
452		✗	c->seek_completed = 0;
453		✗	c->seek_ret = 0;
454
455			while (1) {
456		✗	if (async_check_interrupt(h)) {
457		✗	ret = AVERROR_EXIT;
458		✗	break;
459			}
460		✗	if (c->seek_completed) {
461		✗	if (c->seek_ret >= 0)
462		✗	c->logical_pos = c->seek_ret;
463		✗	ret = c->seek_ret;
464		✗	break;
465			}
466		✗	pthread_cond_signal(&c->cond_wakeup_background);
467		✗	pthread_cond_wait(&c->cond_wakeup_main, &c->mutex);
468			}
469
470		✗	pthread_mutex_unlock(&c->mutex);
471
472		✗	return ret;
473			}
474
475			#define OFFSET(x) offsetof(AsyncContext, x)
476			#define D AV_OPT_FLAG_DECODING_PARAM
477
478			static const AVOption options[] = {
479			{NULL},
480			};
481
482			#undef D
483			#undef OFFSET
484
485			static const AVClass async_context_class = {
486			.class_name = "Async",
487			.item_name = av_default_item_name,
488			.option = options,
489			.version = LIBAVUTIL_VERSION_INT,
490			};
491
492			const URLProtocol ff_async_protocol = {
493			.name = "async",
494			.url_open2 = async_open,
495			.url_read = async_read,
496			.url_seek = async_seek,
497			.url_close = async_close,
498			.priv_data_size = sizeof(AsyncContext),
499			.priv_data_class = &async_context_class,
500			};
501
502			#if 0
503
504			#define TEST_SEEK_POS (1536)
505			#define TEST_STREAM_SIZE (2048)
506
507			typedef struct TestContext {
508			AVClass *class;
509			int64_t logical_pos;
510			int64_t logical_size;
511
512			/* options */
513			int opt_read_error;
514			} TestContext;
515
516			static int async_test_open(URLContext *h, const char *arg, int flags, AVDictionary **options)
517			{
518			TestContext *c = h->priv_data;
519			c->logical_pos = 0;
520			c->logical_size = TEST_STREAM_SIZE;
521			return 0;
522			}
523
524			static int async_test_close(URLContext *h)
525			{
526			return 0;
527			}
528
529			static int async_test_read(URLContext *h, unsigned char *buf, int size)
530			{
531			TestContext *c = h->priv_data;
532			int i;
533			int read_len = 0;
534
535			if (c->opt_read_error)
536			return c->opt_read_error;
537
538			if (c->logical_pos >= c->logical_size)
539			return AVERROR_EOF;
540
541			for (i = 0; i < size; ++i) {
542			buf[i] = c->logical_pos & 0xFF;
543
544			c->logical_pos++;
545			read_len++;
546
547			if (c->logical_pos >= c->logical_size)
548			break;
549			}
550
551			return read_len;
552			}
553
554			static int64_t async_test_seek(URLContext *h, int64_t pos, int whence)
555			{
556			TestContext *c = h->priv_data;
557			int64_t new_logical_pos;
558
559			if (whence == AVSEEK_SIZE) {
560			return c->logical_size;
561			} else if (whence == SEEK_CUR) {
562			new_logical_pos = pos + c->logical_pos;
563			} else if (whence == SEEK_SET){
564			new_logical_pos = pos;
565			} else {
566			return AVERROR(EINVAL);
567			}
568			if (new_logical_pos < 0)
569			return AVERROR(EINVAL);
570
571			c->logical_pos = new_logical_pos;
572			return new_logical_pos;
573			}
574
575			#define OFFSET(x) offsetof(TestContext, x)
576			#define D AV_OPT_FLAG_DECODING_PARAM
577
578			static const AVOption async_test_options[] = {
579			{ "async-test-read-error", "cause read fail",
580			OFFSET(opt_read_error), AV_OPT_TYPE_INT, { .i64 = 0 }, INT_MIN, INT_MAX, .flags = D },
581			{NULL},
582			};
583
584			#undef D
585			#undef OFFSET
586
587			static const AVClass async_test_context_class = {
588			.class_name = "Async-Test",
589			.item_name = av_default_item_name,
590			.option = async_test_options,
591			.version = LIBAVUTIL_VERSION_INT,
592			};
593
594			const URLProtocol ff_async_test_protocol = {
595			.name = "async-test",
596			.url_open2 = async_test_open,
597			.url_read = async_test_read,
598			.url_seek = async_test_seek,
599			.url_close = async_test_close,
600			.priv_data_size = sizeof(TestContext),
601			.priv_data_class = &async_test_context_class,
602			};
603
604			int main(void)
605			{
606			URLContext *h = NULL;
607			int i;
608			int ret;
609			int64_t size;
610			int64_t pos;
611			int64_t read_len;
612			unsigned char buf[4096];
613			AVDictionary *opts = NULL;
614
615			ffurl_register_protocol(&ff_async_protocol);
616			ffurl_register_protocol(&ff_async_test_protocol);
617
618			/*
619			* test normal read
620			*/
621			ret = ffurl_open_whitelist(&h, "async:async-test:", AVIO_FLAG_READ,
622			NULL, NULL, NULL, NULL, NULL);
623			printf("open: %d\n", ret);
624
625			size = ffurl_size(h);
626			printf("size: %"PRId64"\n", size);
627
628			pos = ffurl_seek(h, 0, SEEK_CUR);
629			read_len = 0;
630			while (1) {
631			ret = ffurl_read(h, buf, sizeof(buf));
632			if (ret == AVERROR_EOF) {
633			printf("read-error: AVERROR_EOF at %"PRId64"\n", ffurl_seek(h, 0, SEEK_CUR));
634			break;
635			}
636			else if (ret == 0)
637			break;
638			else if (ret < 0) {
639			printf("read-error: %d at %"PRId64"\n", ret, ffurl_seek(h, 0, SEEK_CUR));
640			goto fail;
641			} else {
642			for (i = 0; i < ret; ++i) {
643			if (buf[i] != (pos & 0xFF)) {
644			printf("read-mismatch: actual %d, expecting %d, at %"PRId64"\n",
645			(int)buf[i], (int)(pos & 0xFF), pos);
646			break;
647			}
648			pos++;
649			}
650			}
651
652			read_len += ret;
653			}
654			printf("read: %"PRId64"\n", read_len);
655
656			/*
657			* test normal seek
658			*/
659			ret = ffurl_read(h, buf, 1);
660			printf("read: %d\n", ret);
661
662			pos = ffurl_seek(h, TEST_SEEK_POS, SEEK_SET);
663			printf("seek: %"PRId64"\n", pos);
664
665			read_len = 0;
666			while (1) {
667			ret = ffurl_read(h, buf, sizeof(buf));
668			if (ret == AVERROR_EOF)
669			break;
670			else if (ret == 0)
671			break;
672			else if (ret < 0) {
673			printf("read-error: %d at %"PRId64"\n", ret, ffurl_seek(h, 0, SEEK_CUR));
674			goto fail;
675			} else {
676			for (i = 0; i < ret; ++i) {
677			if (buf[i] != (pos & 0xFF)) {
678			printf("read-mismatch: actual %d, expecting %d, at %"PRId64"\n",
679			(int)buf[i], (int)(pos & 0xFF), pos);
680			break;
681			}
682			pos++;
683			}
684			}
685
686			read_len += ret;
687			}
688			printf("read: %"PRId64"\n", read_len);
689
690			ret = ffurl_read(h, buf, 1);
691			printf("read: %d\n", ret);
692
693			/*
694			* test read error
695			*/
696			ffurl_close(h);
697			av_dict_set_int(&opts, "async-test-read-error", -10000, 0);
698			ret = ffurl_open_whitelist(&h, "async:async-test:", AVIO_FLAG_READ,
699			NULL, &opts, NULL, NULL, NULL);
700			printf("open: %d\n", ret);
701
702			ret = ffurl_read(h, buf, 1);
703			printf("read: %d\n", ret);
704
705			fail:
706			av_dict_free(&opts);
707			ffurl_close(h);
708			return 0;
709			}
710
711			#endif
712