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/* |
124e2884 |
* buffered I/O |
19720f15 |
* Copyright (c) 2000,2001 Fabrice Bellard |
de6d9b64 |
* |
b78e7197 |
* This file is part of FFmpeg.
*
* FFmpeg is free software; you can redistribute it and/or |
19720f15 |
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either |
b78e7197 |
* version 2.1 of the License, or (at your option) any later version. |
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* |
b78e7197 |
* FFmpeg is distributed in the hope that it will be useful, |
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* but WITHOUT ANY WARRANTY; without even the implied warranty of |
19720f15 |
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details. |
de6d9b64 |
* |
19720f15 |
* You should have received a copy of the GNU Lesser General Public |
b78e7197 |
* License along with FFmpeg; if not, write to the Free Software |
5509bffa |
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
de6d9b64 |
*/ |
245976da |
|
04bc3700 |
#include "libavutil/bprint.h" |
245976da |
#include "libavutil/crc.h" |
1dee0aca |
#include "libavutil/dict.h" |
aa805f94 |
#include "libavutil/intreadwrite.h" |
1dee0aca |
#include "libavutil/log.h"
#include "libavutil/opt.h" |
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#include "libavutil/avassert.h" |
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#include "avformat.h" |
5c91a675 |
#include "avio.h" |
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#include "avio_internal.h" |
603e5c0b |
#include "internal.h" |
0589da0a |
#include "url.h" |
abba3dd1 |
#include <stdarg.h> |
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#define IO_BUFFER_SIZE 32768
|
7939d0ed |
/**
* Do seeks within this distance ahead of the current buffer by skipping
* data instead of calling the protocol seek function, for seekable
* protocols.
*/
#define SHORT_SEEK_THRESHOLD 4096
|
0d4b8a2c |
typedef struct AVIOInternal {
URLContext *h;
} AVIOInternal;
|
c86d8aed |
static void *ff_avio_child_next(void *obj, void *prev) |
1dee0aca |
{
AVIOContext *s = obj; |
cae448cf |
AVIOInternal *internal = s->opaque;
return prev ? NULL : internal->h; |
1dee0aca |
}
|
c86d8aed |
static const AVClass *ff_avio_child_class_next(const AVClass *prev) |
1dee0aca |
{
return prev ? NULL : &ffurl_context_class;
}
|
1dba8371 |
#define OFFSET(x) offsetof(AVIOContext,x)
#define E AV_OPT_FLAG_ENCODING_PARAM
#define D AV_OPT_FLAG_DECODING_PARAM |
c86d8aed |
static const AVOption ff_avio_options[] = { |
1dba8371 |
{"protocol_whitelist", "List of protocols that are allowed to be used", OFFSET(protocol_whitelist), AV_OPT_TYPE_STRING, { .str = NULL }, CHAR_MIN, CHAR_MAX, D }, |
1dee0aca |
{ NULL },
};
|
c86d8aed |
const AVClass ff_avio_class = { |
1dee0aca |
.class_name = "AVIOContext",
.item_name = av_default_item_name,
.version = LIBAVUTIL_VERSION_INT, |
c86d8aed |
.option = ff_avio_options,
.child_next = ff_avio_child_next,
.child_class_next = ff_avio_child_class_next, |
1dee0aca |
}; |
2439f2ca |
|
471fe57e |
static void fill_buffer(AVIOContext *s);
static int url_resetbuf(AVIOContext *s, int flags); |
398f5d3f |
|
ae99313a |
int ffio_init_context(AVIOContext *s, |
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unsigned char *buffer,
int buffer_size,
int write_flag,
void *opaque, |
0c1a9eda |
int (*read_packet)(void *opaque, uint8_t *buf, int buf_size), |
576ae256 |
int (*write_packet)(void *opaque, uint8_t *buf, int buf_size), |
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int64_t (*seek)(void *opaque, int64_t offset, int whence)) |
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{ |
1dd1c1c8 |
s->buffer = buffer; |
61b5ef77 |
s->orig_buffer_size = |
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s->buffer_size = buffer_size; |
1dd1c1c8 |
s->buf_ptr = buffer; |
c14fa7a3 |
s->buf_ptr_max = buffer; |
1dd1c1c8 |
s->opaque = opaque; |
1374b5e1 |
s->direct = 0; |
1dd1c1c8 |
|
59d96941 |
url_resetbuf(s, write_flag ? AVIO_FLAG_WRITE : AVIO_FLAG_READ); |
1dd1c1c8 |
s->write_packet = write_packet;
s->read_packet = read_packet;
s->seek = seek;
s->pos = 0;
s->eof_reached = 0;
s->error = 0; |
65035508 |
s->seekable = seek ? AVIO_SEEKABLE_NORMAL : 0; |
09891c53 |
s->min_packet_size = 0; |
abba3dd1 |
s->max_packet_size = 0; |
1dd1c1c8 |
s->update_checksum = NULL; |
4e640f05 |
s->short_seek_threshold = SHORT_SEEK_THRESHOLD; |
1dd1c1c8 |
if (!read_packet && !write_flag) {
s->pos = buffer_size; |
942f3bb5 |
s->buf_end = s->buffer + buffer_size;
} |
e7e4810a |
s->read_pause = NULL;
s->read_seek = NULL; |
1dd1c1c8 |
|
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s->write_data_type = NULL;
s->ignore_boundary_point = 0;
s->current_type = AVIO_DATA_MARKER_UNKNOWN;
s->last_time = AV_NOPTS_VALUE; |
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s->short_seek_get = NULL; |
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s->written = 0; |
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|
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return 0;
} |
115329f1 |
|
90ed2776 |
AVIOContext *avio_alloc_context( |
1e0f3468 |
unsigned char *buffer,
int buffer_size,
int write_flag,
void *opaque,
int (*read_packet)(void *opaque, uint8_t *buf, int buf_size),
int (*write_packet)(void *opaque, uint8_t *buf, int buf_size), |
7f37f568 |
int64_t (*seek)(void *opaque, int64_t offset, int whence))
{ |
471fe57e |
AVIOContext *s = av_mallocz(sizeof(AVIOContext)); |
9e2dabed |
if (!s)
return NULL; |
ae99313a |
ffio_init_context(s, buffer, buffer_size, write_flag, opaque, |
1e0f3468 |
read_packet, write_packet, seek);
return s;
}
|
b12e4d3b |
void avio_context_free(AVIOContext **ps)
{
av_freep(ps);
}
|
a45605a1 |
static void writeout(AVIOContext *s, const uint8_t *data, int len)
{ |
5d75e466 |
if (!s->error) {
int ret = 0;
if (s->write_data_type)
ret = s->write_data_type(s->opaque, (uint8_t *)data,
len,
s->current_type,
s->last_time);
else if (s->write_packet)
ret = s->write_packet(s->opaque, (uint8_t *)data, len); |
1374b5e1 |
if (ret < 0) { |
a45605a1 |
s->error = ret; |
34d7f337 |
} else {
if (s->pos + len > s->written)
s->written = s->pos + len; |
a45605a1 |
}
} |
5d75e466 |
if (s->current_type == AVIO_DATA_MARKER_SYNC_POINT ||
s->current_type == AVIO_DATA_MARKER_BOUNDARY_POINT) {
s->current_type = AVIO_DATA_MARKER_UNKNOWN;
}
s->last_time = AV_NOPTS_VALUE; |
ad6a50c0 |
s->writeout_count ++; |
a45605a1 |
s->pos += len;
}
|
471fe57e |
static void flush_buffer(AVIOContext *s) |
de6d9b64 |
{ |
c14fa7a3 |
s->buf_ptr_max = FFMAX(s->buf_ptr, s->buf_ptr_max);
if (s->write_flag && s->buf_ptr_max > s->buffer) {
writeout(s, s->buffer, s->buf_ptr_max - s->buffer); |
1dd1c1c8 |
if (s->update_checksum) {
s->checksum = s->update_checksum(s->checksum, s->checksum_ptr, |
c14fa7a3 |
s->buf_ptr_max - s->checksum_ptr); |
1dd1c1c8 |
s->checksum_ptr = s->buffer; |
ee9f36a8 |
} |
de6d9b64 |
} |
c14fa7a3 |
s->buf_ptr = s->buf_ptr_max = s->buffer; |
c8422f04 |
if (!s->write_flag)
s->buf_end = s->buffer; |
de6d9b64 |
}
|
e9eb8d0b |
void avio_w8(AVIOContext *s, int b) |
de6d9b64 |
{ |
8a34b85f |
av_assert2(b>=-128 && b<=255); |
3dc99a18 |
*s->buf_ptr++ = b; |
115329f1 |
if (s->buf_ptr >= s->buf_end) |
de6d9b64 |
flush_buffer(s);
}
|
2df9d000 |
void ffio_fill(AVIOContext *s, int b, int count) |
17ee8f66 |
{
while (count > 0) {
int len = FFMIN(s->buf_end - s->buf_ptr, count);
memset(s->buf_ptr, b, len);
s->buf_ptr += len;
if (s->buf_ptr >= s->buf_end)
flush_buffer(s);
count -= len;
}
}
|
e9eb8d0b |
void avio_write(AVIOContext *s, const unsigned char *buf, int size) |
de6d9b64 |
{ |
a45605a1 |
if (s->direct && !s->update_checksum) {
avio_flush(s);
writeout(s, buf, size);
return;
} |
de6d9b64 |
while (size > 0) { |
90aa6ace |
int len = FFMIN(s->buf_end - s->buf_ptr, size); |
de6d9b64 |
memcpy(s->buf_ptr, buf, len);
s->buf_ptr += len;
|
115329f1 |
if (s->buf_ptr >= s->buf_end) |
de6d9b64 |
flush_buffer(s);
buf += len;
size -= len;
}
}
|
b7f2fdde |
void avio_flush(AVIOContext *s) |
de6d9b64 |
{ |
c14fa7a3 |
int seekback = s->write_flag ? FFMIN(0, s->buf_ptr - s->buf_ptr_max) : 0; |
de6d9b64 |
flush_buffer(s); |
c14fa7a3 |
if (seekback)
avio_seek(s, seekback, SEEK_CUR); |
de6d9b64 |
}
|
f59d8ff8 |
int64_t avio_seek(AVIOContext *s, int64_t offset, int whence) |
de6d9b64 |
{ |
bc5c918e |
int64_t offset1;
int64_t pos; |
c6a5e087 |
int force = whence & AVSEEK_FORCE; |
2adf422c |
int buffer_size; |
8c8e5d52 |
int short_seek; |
c6a5e087 |
whence &= ~AVSEEK_FORCE; |
899681cd |
if(!s)
return AVERROR(EINVAL);
|
2adf422c |
buffer_size = s->buf_end - s->buffer; |
a01c24e8 |
// pos is the absolute position that the beginning of s->buffer corresponds to in the file |
2adf422c |
pos = s->pos - (s->write_flag ? 0 : buffer_size); |
de6d9b64 |
if (whence != SEEK_CUR && whence != SEEK_SET) |
8fa36ae0 |
return AVERROR(EINVAL); |
115329f1 |
|
f40d1739 |
if (whence == SEEK_CUR) {
offset1 = pos + (s->buf_ptr - s->buffer);
if (offset == 0)
return offset1; |
eca2a497 |
if (offset > INT64_MAX - offset1)
return AVERROR(EINVAL); |
f40d1739 |
offset += offset1;
} |
ed86dbd0 |
if (offset < 0)
return AVERROR(EINVAL);
|
8c8e5d52 |
if (s->short_seek_get) {
short_seek = s->short_seek_get(s->opaque);
/* fallback to default short seek */
if (short_seek <= 0)
short_seek = s->short_seek_threshold;
} else
short_seek = s->short_seek_threshold;
|
a01c24e8 |
offset1 = offset - pos; // "offset1" is the relative offset from the beginning of s->buffer |
c14fa7a3 |
s->buf_ptr_max = FFMAX(s->buf_ptr_max, s->buf_ptr);
if ((!s->direct || !s->seek) &&
offset1 >= 0 && offset1 <= (s->write_flag ? s->buf_ptr_max - s->buffer : buffer_size)) { |
f40d1739 |
/* can do the seek inside the buffer */
s->buf_ptr = s->buffer + offset1; |
83548fe8 |
} else if ((!(s->seekable & AVIO_SEEKABLE_NORMAL) || |
8c8e5d52 |
offset1 <= buffer_size + short_seek) && |
7939d0ed |
!s->write_flag && offset1 >= 0 && |
a45605a1 |
(!s->direct || !s->seek) && |
7a6fe01f |
(whence != SEEK_END || force)) { |
398f5d3f |
while(s->pos < offset && !s->eof_reached)
fill_buffer(s); |
5cb4b82a |
if (s->eof_reached) |
8d5e638f |
return AVERROR_EOF; |
a01ba7f5 |
s->buf_ptr = s->buf_end - (s->pos - offset); |
9600486d |
} else if(!s->write_flag && offset1 < 0 && -offset1 < buffer_size>>1 && s->seek && offset > 0) { |
9d30e068 |
int64_t res; |
68fcdbf1 |
|
9600486d |
pos -= FFMIN(buffer_size>>1, pos);
if ((res = s->seek(s->opaque, pos, SEEK_SET)) < 0)
return res;
s->buf_end =
s->buf_ptr = s->buffer;
s->pos = pos;
s->eof_reached = 0;
fill_buffer(s);
return avio_seek(s, offset, SEEK_SET | force);
} else {
int64_t res; |
f40d1739 |
if (s->write_flag) { |
de6d9b64 |
flush_buffer(s);
} |
9d30e068 |
if (!s->seek)
return AVERROR(EPIPE);
if ((res = s->seek(s->opaque, offset, SEEK_SET)) < 0) |
68fcdbf1 |
return res; |
11153a93 |
s->seek_count ++; |
39a127bf |
if (!s->write_flag)
s->buf_end = s->buffer; |
c14fa7a3 |
s->buf_ptr = s->buf_ptr_max = s->buffer; |
f40d1739 |
s->pos = offset; |
de6d9b64 |
} |
f40d1739 |
s->eof_reached = 0; |
de6d9b64 |
return offset;
}
|
75a8e0f0 |
int64_t avio_skip(AVIOContext *s, int64_t offset)
{
return avio_seek(s, offset, SEEK_CUR);
}
|
db44ea96 |
int64_t avio_size(AVIOContext *s) |
a965c478 |
{ |
bc5c918e |
int64_t size; |
115329f1 |
|
1dd1c1c8 |
if (!s) |
899681cd |
return AVERROR(EINVAL);
|
3f75e511 |
if (s->written)
return s->written;
|
a965c478 |
if (!s->seek) |
4c4ef3db |
return AVERROR(ENOSYS); |
8e287af0 |
size = s->seek(s->opaque, 0, AVSEEK_SIZE); |
1dd1c1c8 |
if (size < 0) { |
8f42f523 |
if ((size = s->seek(s->opaque, -1, SEEK_END)) < 0)
return size;
size++; |
1ae2c5f2 |
s->seek(s->opaque, s->pos, SEEK_SET); |
8e287af0 |
} |
a965c478 |
return size;
}
|
5c3c6712 |
int avio_feof(AVIOContext *s) |
de6d9b64 |
{ |
899681cd |
if(!s)
return 0; |
3bd624b4 |
if(s->eof_reached){
s->eof_reached=0;
fill_buffer(s);
} |
de6d9b64 |
return s->eof_reached;
}
|
e9eb8d0b |
void avio_wl32(AVIOContext *s, unsigned int val) |
de6d9b64 |
{ |
a3fb3a67 |
avio_w8(s, (uint8_t) val );
avio_w8(s, (uint8_t)(val >> 8 ));
avio_w8(s, (uint8_t)(val >> 16));
avio_w8(s, val >> 24 ); |
de6d9b64 |
}
|
e9eb8d0b |
void avio_wb32(AVIOContext *s, unsigned int val) |
de6d9b64 |
{ |
a3fb3a67 |
avio_w8(s, val >> 24 );
avio_w8(s, (uint8_t)(val >> 16));
avio_w8(s, (uint8_t)(val >> 8 ));
avio_w8(s, (uint8_t) val ); |
de6d9b64 |
}
|
471fe57e |
int avio_put_str(AVIOContext *s, const char *str) |
e910a77b |
{
int len = 1;
if (str) {
len += strlen(str); |
e9eb8d0b |
avio_write(s, (const unsigned char *) str, len); |
e910a77b |
} else |
e9eb8d0b |
avio_w8(s, 0); |
e910a77b |
return len; |
75bdb984 |
}
|
81a91269 |
static inline int put_str16(AVIOContext *s, const char *str, const int be) |
6e89b612 |
{
const uint8_t *q = str;
int ret = 0; |
269f5d90 |
int err = 0; |
6e89b612 |
while (*q) {
uint32_t ch;
uint16_t tmp;
|
b52ae27e |
GET_UTF8(ch, *q++, goto invalid;) |
81a91269 |
PUT_UTF16(ch, tmp, be ? avio_wb16(s, tmp) : avio_wl16(s, tmp);
ret += 2;) |
b52ae27e |
continue;
invalid: |
d688f39d |
av_log(s, AV_LOG_ERROR, "Invalid UTF8 sequence in avio_put_str16%s\n", be ? "be" : "le"); |
269f5d90 |
err = AVERROR(EINVAL); |
115fb6d0 |
if (!*(q-1))
break; |
6e89b612 |
} |
81a91269 |
if (be)
avio_wb16(s, 0);
else
avio_wl16(s, 0); |
269f5d90 |
if (err)
return err; |
6e89b612 |
ret += 2;
return ret;
}
|
81a91269 |
#define PUT_STR16(type, big_endian) \
int avio_put_str16 ## type(AVIOContext *s, const char *str) \
{ \
return put_str16(s, str, big_endian); \
}
PUT_STR16(le, 0)
PUT_STR16(be, 1)
#undef PUT_STR16
|
1dd1c1c8 |
int ff_get_v_length(uint64_t val)
{
int i = 1; |
603e5c0b |
|
1dd1c1c8 |
while (val >>= 7) |
603e5c0b |
i++;
return i;
}
|
1dd1c1c8 |
void ff_put_v(AVIOContext *bc, uint64_t val)
{
int i = ff_get_v_length(val); |
603e5c0b |
|
1dd1c1c8 |
while (--i > 0) |
1374b5e1 |
avio_w8(bc, 128 | (uint8_t)(val >> (7*i))); |
603e5c0b |
|
1dd1c1c8 |
avio_w8(bc, val & 127); |
603e5c0b |
}
|
e9eb8d0b |
void avio_wl64(AVIOContext *s, uint64_t val) |
de6d9b64 |
{ |
e9eb8d0b |
avio_wl32(s, (uint32_t)(val & 0xffffffff));
avio_wl32(s, (uint32_t)(val >> 32)); |
de6d9b64 |
}
|
e9eb8d0b |
void avio_wb64(AVIOContext *s, uint64_t val) |
de6d9b64 |
{ |
e9eb8d0b |
avio_wb32(s, (uint32_t)(val >> 32));
avio_wb32(s, (uint32_t)(val & 0xffffffff)); |
de6d9b64 |
}
|
e9eb8d0b |
void avio_wl16(AVIOContext *s, unsigned int val) |
de6d9b64 |
{ |
a3fb3a67 |
avio_w8(s, (uint8_t)val);
avio_w8(s, (int)val >> 8); |
de6d9b64 |
}
|
e9eb8d0b |
void avio_wb16(AVIOContext *s, unsigned int val) |
de6d9b64 |
{ |
a3fb3a67 |
avio_w8(s, (int)val >> 8);
avio_w8(s, (uint8_t)val); |
de6d9b64 |
}
|
e9eb8d0b |
void avio_wl24(AVIOContext *s, unsigned int val) |
ea395e8c |
{ |
e9eb8d0b |
avio_wl16(s, val & 0xffff); |
a3fb3a67 |
avio_w8(s, (int)val >> 16); |
ea395e8c |
}
|
e9eb8d0b |
void avio_wb24(AVIOContext *s, unsigned int val) |
a254c574 |
{ |
a3fb3a67 |
avio_wb16(s, (int)val >> 8);
avio_w8(s, (uint8_t)val); |
a254c574 |
}
|
db7968bf |
void avio_write_marker(AVIOContext *s, int64_t time, enum AVIODataMarkerType type)
{ |
09891c53 |
if (type == AVIO_DATA_MARKER_FLUSH_POINT) {
if (s->buf_ptr - s->buffer >= s->min_packet_size)
avio_flush(s);
return;
} |
db7968bf |
if (!s->write_data_type)
return;
// If ignoring boundary points, just treat it as unknown
if (type == AVIO_DATA_MARKER_BOUNDARY_POINT && s->ignore_boundary_point)
type = AVIO_DATA_MARKER_UNKNOWN;
// Avoid unnecessary flushes if we are already in non-header/trailer
// data and setting the type to unknown
if (type == AVIO_DATA_MARKER_UNKNOWN &&
(s->current_type != AVIO_DATA_MARKER_HEADER &&
s->current_type != AVIO_DATA_MARKER_TRAILER))
return;
switch (type) {
case AVIO_DATA_MARKER_HEADER:
case AVIO_DATA_MARKER_TRAILER:
// For header/trailer, ignore a new marker of the same type;
// consecutive header/trailer markers can be merged.
if (type == s->current_type)
return;
break;
}
// If we've reached here, we have a new, noteworthy marker.
// Flush the previous data and mark the start of the new data.
avio_flush(s);
s->current_type = type;
s->last_time = time;
}
|
a606f27f |
static int read_packet_wrapper(AVIOContext *s, uint8_t *buf, int size)
{
int ret;
if (!s->read_packet) |
158a79c3 |
return AVERROR(EINVAL); |
a606f27f |
ret = s->read_packet(s->opaque, buf, size);
#if FF_API_OLD_AVIO_EOF_0
if (!ret && !s->max_packet_size) {
av_log(NULL, AV_LOG_WARNING, "Invalid return value 0 for stream protocol\n");
ret = AVERROR_EOF;
}
#else
av_assert2(ret || s->max_packet_size);
#endif
return ret;
}
|
de6d9b64 |
/* Input stream */
|
471fe57e |
static void fill_buffer(AVIOContext *s) |
de6d9b64 |
{ |
1dd1c1c8 |
int max_buffer_size = s->max_packet_size ?
s->max_packet_size : IO_BUFFER_SIZE; |
2ca48e46 |
uint8_t *dst = s->buf_end - s->buffer + max_buffer_size < s->buffer_size ?
s->buf_end : s->buffer;
int len = s->buffer_size - (dst - s->buffer); |
4589dc5c |
|
b22ecbc6 |
/* can't fill the buffer without read_packet, just set EOF if appropriate */ |
a2d1d216 |
if (!s->read_packet && s->buf_ptr >= s->buf_end)
s->eof_reached = 1;
|
abba3dd1 |
/* no need to do anything if EOF already reached */
if (s->eof_reached)
return; |
ee9f36a8 |
|
1dd1c1c8 |
if (s->update_checksum && dst == s->buffer) {
if (s->buf_end > s->checksum_ptr)
s->checksum = s->update_checksum(s->checksum, s->checksum_ptr,
s->buf_end - s->checksum_ptr);
s->checksum_ptr = s->buffer; |
ee9f36a8 |
}
|
01d91b9b |
/* make buffer smaller in case it ended up large after probing */ |
61b5ef77 |
if (s->read_packet && s->orig_buffer_size && s->buffer_size > s->orig_buffer_size) { |
7383a835 |
if (dst == s->buffer && s->buf_ptr != dst) { |
0023ea4e |
int ret = ffio_set_buf_size(s, s->orig_buffer_size);
if (ret < 0)
av_log(s, AV_LOG_WARNING, "Failed to decrease buffer size\n"); |
01d91b9b |
|
2ca48e46 |
s->checksum_ptr = dst = s->buffer;
} |
61b5ef77 |
av_assert0(len >= s->orig_buffer_size);
len = s->orig_buffer_size; |
01d91b9b |
}
|
a606f27f |
len = read_packet_wrapper(s, dst, len); |
858db4b0 |
if (len == AVERROR_EOF) { |
abba3dd1 |
/* do not modify buffer if EOF reached so that a seek back can
be done without rereading data */ |
de6d9b64 |
s->eof_reached = 1; |
858db4b0 |
} else if (len < 0) {
s->eof_reached = 1;
s->error= len; |
abba3dd1 |
} else {
s->pos += len; |
4589dc5c |
s->buf_ptr = dst;
s->buf_end = dst + len; |
11153a93 |
s->bytes_read += len; |
de6d9b64 |
}
}
|
7f37f568 |
unsigned long ff_crc04C11DB7_update(unsigned long checksum, const uint8_t *buf,
unsigned int len)
{ |
3abe5fbd |
return av_crc(av_crc_get_table(AV_CRC_32_IEEE), checksum, buf, len); |
992e78f5 |
}
|
155f4e96 |
unsigned long ff_crcEDB88320_update(unsigned long checksum, const uint8_t *buf,
unsigned int len)
{
return av_crc(av_crc_get_table(AV_CRC_32_IEEE_LE), checksum, buf, len);
}
|
32d05934 |
unsigned long ff_crcA001_update(unsigned long checksum, const uint8_t *buf,
unsigned int len)
{
return av_crc(av_crc_get_table(AV_CRC_16_ANSI_LE), checksum, buf, len);
}
|
b64030f2 |
unsigned long ffio_get_checksum(AVIOContext *s) |
7f37f568 |
{ |
1dd1c1c8 |
s->checksum = s->update_checksum(s->checksum, s->checksum_ptr,
s->buf_ptr - s->checksum_ptr);
s->update_checksum = NULL; |
ee9f36a8 |
return s->checksum;
}
|
4c4427a7 |
void ffio_init_checksum(AVIOContext *s, |
7f37f568 |
unsigned long (*update_checksum)(unsigned long c, const uint8_t *p, unsigned int len),
unsigned long checksum)
{ |
1dd1c1c8 |
s->update_checksum = update_checksum;
if (s->update_checksum) {
s->checksum = checksum;
s->checksum_ptr = s->buf_ptr; |
465e1dad |
} |
ee9f36a8 |
}
|
abba3dd1 |
/* XXX: put an inline version */ |
e63a3628 |
int avio_r8(AVIOContext *s) |
de6d9b64 |
{ |
3aa13da9 |
if (s->buf_ptr >= s->buf_end) |
de6d9b64 |
fill_buffer(s); |
853a0fcc |
if (s->buf_ptr < s->buf_end)
return *s->buf_ptr++;
return 0; |
de6d9b64 |
}
|
e63a3628 |
int avio_read(AVIOContext *s, unsigned char *buf, int size) |
de6d9b64 |
{
int len, size1;
size1 = size;
while (size > 0) { |
a01ba7f5 |
len = FFMIN(s->buf_end - s->buf_ptr, size); |
a0b7e289 |
if (len == 0 || s->write_flag) { |
a01c24e8 |
if((s->direct || size > s->buffer_size) && !s->update_checksum) {
// bypass the buffer and read data directly into buf |
a606f27f |
len = read_packet_wrapper(s, buf, size); |
858db4b0 |
if (len == AVERROR_EOF) { |
3e2b6358 |
/* do not modify buffer if EOF reached so that a seek back can
be done without rereading data */
s->eof_reached = 1; |
858db4b0 |
break;
} else if (len < 0) {
s->eof_reached = 1;
s->error= len; |
3e2b6358 |
break;
} else {
s->pos += len; |
4b9e4486 |
s->bytes_read += len; |
3e2b6358 |
size -= len;
buf += len; |
a01c24e8 |
// reset the buffer |
3e2b6358 |
s->buf_ptr = s->buffer;
s->buf_end = s->buffer/* + len*/;
} |
1dd1c1c8 |
} else { |
3e2b6358 |
fill_buffer(s);
len = s->buf_end - s->buf_ptr;
if (len == 0)
break;
} |
de6d9b64 |
} else {
memcpy(buf, s->buf_ptr, len);
buf += len;
s->buf_ptr += len;
size -= len;
}
} |
7f7686df |
if (size1 == size) { |
6947b0c4 |
if (s->error) return s->error; |
7a2c380e |
if (avio_feof(s)) return AVERROR_EOF; |
7f7686df |
} |
de6d9b64 |
return size1 - size;
}
|
bff0349d |
int ffio_read_size(AVIOContext *s, unsigned char *buf, int size)
{
int ret = avio_read(s, buf, size);
if (ret != size)
return AVERROR_INVALIDDATA;
return ret;
}
|
5afe1d27 |
int ffio_read_indirect(AVIOContext *s, unsigned char *buf, int size, const unsigned char **data) |
daf1e0d3 |
{
if (s->buf_end - s->buf_ptr >= size && !s->write_flag) {
*data = s->buf_ptr;
s->buf_ptr += size;
return size;
} else {
*data = buf;
return avio_read(s, buf, size);
}
}
|
5d766747 |
int avio_read_partial(AVIOContext *s, unsigned char *buf, int size) |
e15dec10 |
{
int len; |
115329f1 |
|
1dd1c1c8 |
if (size < 0) |
0ecca7a4 |
return -1; |
e15dec10 |
|
a0b7e289 |
if (s->read_packet && s->write_flag) { |
a606f27f |
len = read_packet_wrapper(s, buf, size); |
a0b7e289 |
if (len > 0)
s->pos += len;
return len;
}
|
e15dec10 |
len = s->buf_end - s->buf_ptr;
if (len == 0) { |
53c25ee0 |
/* Reset the buf_end pointer to the start of the buffer, to make sure
* the fill_buffer call tries to read as much data as fits into the
* full buffer, instead of just what space is left after buf_end.
* This avoids returning partial packets at the end of the buffer,
* for packet based inputs.
*/
s->buf_end = s->buf_ptr = s->buffer; |
e15dec10 |
fill_buffer(s);
len = s->buf_end - s->buf_ptr;
}
if (len > size)
len = size;
memcpy(buf, s->buf_ptr, len);
s->buf_ptr += len; |
7f7686df |
if (!len) { |
6947b0c4 |
if (s->error) return s->error; |
7a2c380e |
if (avio_feof(s)) return AVERROR_EOF; |
7f7686df |
} |
e15dec10 |
return len;
}
|
e63a3628 |
unsigned int avio_rl16(AVIOContext *s) |
de6d9b64 |
{
unsigned int val; |
e63a3628 |
val = avio_r8(s);
val |= avio_r8(s) << 8; |
de6d9b64 |
return val;
}
|
e63a3628 |
unsigned int avio_rl24(AVIOContext *s) |
ea395e8c |
{
unsigned int val; |
e63a3628 |
val = avio_rl16(s);
val |= avio_r8(s) << 16; |
ea395e8c |
return val;
}
|
e63a3628 |
unsigned int avio_rl32(AVIOContext *s) |
de6d9b64 |
{
unsigned int val; |
e63a3628 |
val = avio_rl16(s);
val |= avio_rl16(s) << 16; |
de6d9b64 |
return val;
}
|
e63a3628 |
uint64_t avio_rl64(AVIOContext *s) |
de6d9b64 |
{ |
0c1a9eda |
uint64_t val; |
e63a3628 |
val = (uint64_t)avio_rl32(s);
val |= (uint64_t)avio_rl32(s) << 32; |
de6d9b64 |
return val;
}
|
e63a3628 |
unsigned int avio_rb16(AVIOContext *s) |
de6d9b64 |
{
unsigned int val; |
e63a3628 |
val = avio_r8(s) << 8;
val |= avio_r8(s); |
de6d9b64 |
return val;
}
|
e63a3628 |
unsigned int avio_rb24(AVIOContext *s) |
de6d9b64 |
{
unsigned int val; |
e63a3628 |
val = avio_rb16(s) << 8;
val |= avio_r8(s); |
de6d9b64 |
return val;
} |
e63a3628 |
unsigned int avio_rb32(AVIOContext *s) |
a254c574 |
{
unsigned int val; |
e63a3628 |
val = avio_rb16(s) << 16;
val |= avio_rb16(s); |
a254c574 |
return val;
} |
de6d9b64 |
|
471fe57e |
int ff_get_line(AVIOContext *s, char *buf, int maxlen) |
7c892951 |
{
int i = 0;
char c;
do { |
e63a3628 |
c = avio_r8(s); |
a43416a5 |
if (c && i < maxlen-1) |
7c892951 |
buf[i++] = c; |
46380e8d |
} while (c != '\n' && c != '\r' && c); |
eac5c7b8 |
if (c == '\r' && avio_r8(s) != '\n' && !avio_feof(s)) |
46380e8d |
avio_skip(s, -1); |
7c892951 |
buf[i] = 0; |
a43416a5 |
return i; |
7c892951 |
}
|
3e1a8e1e |
int avio_get_str(AVIOContext *s, int maxlen, char *buf, int buflen)
{
int i;
|
ab294069 |
if (buflen <= 0)
return AVERROR(EINVAL); |
3e1a8e1e |
// reserve 1 byte for terminating 0
buflen = FFMIN(buflen - 1, maxlen);
for (i = 0; i < buflen; i++)
if (!(buf[i] = avio_r8(s)))
return i + 1; |
ab294069 |
buf[i] = 0; |
3e1a8e1e |
for (; i < maxlen; i++)
if (!avio_r8(s))
return i + 1;
return maxlen;
}
|
f9d6b13a |
#define GET_STR16(type, read) \ |
471fe57e |
int avio_get_str16 ##type(AVIOContext *pb, int maxlen, char *buf, int buflen)\ |
f9d6b13a |
{\
char* q = buf;\
int ret = 0;\ |
ab294069 |
if (buflen <= 0) \
return AVERROR(EINVAL); \ |
f9d6b13a |
while (ret + 1 < maxlen) {\
uint8_t tmp;\
uint32_t ch;\
GET_UTF16(ch, (ret += 2) <= maxlen ? read(pb) : 0, break;)\
if (!ch)\
break;\
PUT_UTF8(ch, tmp, if (q - buf < buflen - 1) *q++ = tmp;)\
}\
*q = 0;\
return ret;\
}\
|
e63a3628 |
GET_STR16(le, avio_rl16)
GET_STR16(be, avio_rb16) |
f9d6b13a |
#undef GET_STR16
|
e63a3628 |
uint64_t avio_rb64(AVIOContext *s) |
de6d9b64 |
{ |
0c1a9eda |
uint64_t val; |
e63a3628 |
val = (uint64_t)avio_rb32(s) << 32;
val |= (uint64_t)avio_rb32(s); |
de6d9b64 |
return val;
}
|
4839c192 |
uint64_t ffio_read_varlen(AVIOContext *bc){ |
897d3eef |
uint64_t val = 0;
int tmp;
do{ |
e63a3628 |
tmp = avio_r8(bc); |
897d3eef |
val= (val<<7) + (tmp&127);
}while(tmp&128);
return val;
}
|
cae448cf |
static int io_read_packet(void *opaque, uint8_t *buf, int buf_size)
{
AVIOInternal *internal = opaque;
return ffurl_read(internal->h, buf, buf_size);
}
static int io_write_packet(void *opaque, uint8_t *buf, int buf_size)
{
AVIOInternal *internal = opaque;
return ffurl_write(internal->h, buf, buf_size);
}
static int64_t io_seek(void *opaque, int64_t offset, int whence)
{
AVIOInternal *internal = opaque;
return ffurl_seek(internal->h, offset, whence);
}
|
8c8e5d52 |
static int io_short_seek(void *opaque)
{
AVIOInternal *internal = opaque;
return ffurl_get_short_seek(internal->h);
}
|
cae448cf |
static int io_read_pause(void *opaque, int pause)
{
AVIOInternal *internal = opaque;
if (!internal->h->prot->url_read_pause)
return AVERROR(ENOSYS);
return internal->h->prot->url_read_pause(internal->h, pause);
}
static int64_t io_read_seek(void *opaque, int stream_index, int64_t timestamp, int flags)
{
AVIOInternal *internal = opaque;
if (!internal->h->prot->url_read_seek)
return AVERROR(ENOSYS);
return internal->h->prot->url_read_seek(internal->h, stream_index, timestamp, flags);
}
|
724f6a0f |
int ffio_fdopen(AVIOContext **s, URLContext *h) |
de6d9b64 |
{ |
cae448cf |
AVIOInternal *internal = NULL;
uint8_t *buffer = NULL; |
abba3dd1 |
int buffer_size, max_packet_size; |
de6d9b64 |
|
5958df34 |
max_packet_size = h->max_packet_size; |
abba3dd1 |
if (max_packet_size) {
buffer_size = max_packet_size; /* no need to bufferize more than one packet */
} else {
buffer_size = IO_BUFFER_SIZE;
} |
1ea4f593 |
buffer = av_malloc(buffer_size); |
de6d9b64 |
if (!buffer) |
8fa36ae0 |
return AVERROR(ENOMEM); |
de6d9b64 |
|
cae448cf |
internal = av_mallocz(sizeof(*internal));
if (!internal)
goto fail;
internal->h = h;
*s = avio_alloc_context(buffer, buffer_size, h->flags & AVIO_FLAG_WRITE,
internal, io_read_packet, io_write_packet, io_seek);
if (!*s)
goto fail;
|
1dba8371 |
(*s)->protocol_whitelist = av_strdup(h->protocol_whitelist);
if (!(*s)->protocol_whitelist && h->protocol_whitelist) {
avio_closep(s); |
b9aa4ccf |
goto fail; |
1dba8371 |
} |
93629735 |
(*s)->protocol_blacklist = av_strdup(h->protocol_blacklist);
if (!(*s)->protocol_blacklist && h->protocol_blacklist) {
avio_closep(s);
goto fail;
} |
a45605a1 |
(*s)->direct = h->flags & AVIO_FLAG_DIRECT; |
b9aa4ccf |
|
8978feda |
(*s)->seekable = h->is_streamed ? 0 : AVIO_SEEKABLE_NORMAL; |
899681cd |
(*s)->max_packet_size = max_packet_size; |
09891c53 |
(*s)->min_packet_size = h->min_packet_size; |
e7e4810a |
if(h->prot) { |
cae448cf |
(*s)->read_pause = io_read_pause;
(*s)->read_seek = io_read_seek; |
8ea35af7 |
if (h->prot->url_read_seek)
(*s)->seekable |= AVIO_SEEKABLE_TIME; |
e7e4810a |
} |
8c8e5d52 |
(*s)->short_seek_get = io_short_seek; |
c86d8aed |
(*s)->av_class = &ff_avio_class; |
de6d9b64 |
return 0; |
cae448cf |
fail:
av_freep(&internal);
av_freep(&buffer);
return AVERROR(ENOMEM); |
de6d9b64 |
}
|
62f63b24 |
URLContext* ffio_geturlcontext(AVIOContext *s)
{
AVIOInternal *internal;
if (!s)
return NULL;
internal = s->opaque;
if (internal && s->read_packet == io_read_packet)
return internal->h;
else
return NULL;
}
|
ff9a1541 |
int ffio_ensure_seekback(AVIOContext *s, int64_t buf_size) |
186ec178 |
{
uint8_t *buffer;
int max_buffer_size = s->max_packet_size ?
s->max_packet_size : IO_BUFFER_SIZE; |
0d4a66ee |
int filled = s->buf_end - s->buffer; |
dc877587 |
ptrdiff_t checksum_ptr_offset = s->checksum_ptr ? s->checksum_ptr - s->buffer : -1; |
186ec178 |
buf_size += s->buf_ptr - s->buffer + max_buffer_size;
|
46778ab2 |
if (buf_size < filled || s->seekable || !s->read_packet) |
186ec178 |
return 0;
av_assert0(!s->write_flag);
buffer = av_malloc(buf_size);
if (!buffer)
return AVERROR(ENOMEM);
|
0d4a66ee |
memcpy(buffer, s->buffer, filled); |
186ec178 |
av_free(s->buffer);
s->buf_ptr = buffer + (s->buf_ptr - s->buffer);
s->buf_end = buffer + (s->buf_end - s->buffer);
s->buffer = buffer;
s->buffer_size = buf_size; |
dc877587 |
if (checksum_ptr_offset >= 0)
s->checksum_ptr = s->buffer + checksum_ptr_offset; |
186ec178 |
return 0;
}
|
59f65d95 |
int ffio_set_buf_size(AVIOContext *s, int buf_size) |
de6d9b64 |
{ |
0c1a9eda |
uint8_t *buffer; |
1ea4f593 |
buffer = av_malloc(buf_size); |
de6d9b64 |
if (!buffer) |
8fa36ae0 |
return AVERROR(ENOMEM); |
de6d9b64 |
|
1ea4f593 |
av_free(s->buffer); |
de6d9b64 |
s->buffer = buffer; |
61b5ef77 |
s->orig_buffer_size = |
de6d9b64 |
s->buffer_size = buf_size; |
c14fa7a3 |
s->buf_ptr = s->buf_ptr_max = buffer; |
59d96941 |
url_resetbuf(s, s->write_flag ? AVIO_FLAG_WRITE : AVIO_FLAG_READ); |
770d9daf |
return 0;
}
|
471fe57e |
static int url_resetbuf(AVIOContext *s, int flags) |
770d9daf |
{ |
47f83030 |
av_assert1(flags == AVIO_FLAG_WRITE || flags == AVIO_FLAG_READ); |
770d9daf |
|
59d96941 |
if (flags & AVIO_FLAG_WRITE) { |
770d9daf |
s->buf_end = s->buffer + s->buffer_size;
s->write_flag = 1;
} else {
s->buf_end = s->buffer;
s->write_flag = 0;
} |
de6d9b64 |
return 0;
}
|
120b38b9 |
int ffio_rewind_with_probe_data(AVIOContext *s, unsigned char **bufp, int buf_size) |
01d91b9b |
{
int64_t buffer_start;
int buffer_size; |
496c645d |
int overlap, new_size, alloc_size; |
120b38b9 |
uint8_t *buf = *bufp; |
01d91b9b |
|
120b38b9 |
if (s->write_flag) {
av_freep(bufp); |
01d91b9b |
return AVERROR(EINVAL); |
120b38b9 |
} |
01d91b9b |
buffer_size = s->buf_end - s->buffer;
/* the buffers must touch or overlap */ |
120b38b9 |
if ((buffer_start = s->pos - buffer_size) > buf_size) {
av_freep(bufp); |
01d91b9b |
return AVERROR(EINVAL); |
120b38b9 |
} |
01d91b9b |
overlap = buf_size - buffer_start;
new_size = buf_size + buffer_size - overlap;
|
496c645d |
alloc_size = FFMAX(s->buffer_size, new_size);
if (alloc_size > buf_size) |
120b38b9 |
if (!(buf = (*bufp) = av_realloc_f(buf, 1, alloc_size))) |
01d91b9b |
return AVERROR(ENOMEM);
|
496c645d |
if (new_size > buf_size) { |
01d91b9b |
memcpy(buf + buf_size, s->buffer + overlap, buffer_size - overlap);
buf_size = new_size;
}
av_free(s->buffer);
s->buf_ptr = s->buffer = buf; |
496c645d |
s->buffer_size = alloc_size;
s->pos = buf_size; |
01d91b9b |
s->buf_end = s->buf_ptr + buf_size;
s->eof_reached = 0;
return 0;
}
|
ebb92e07 |
int avio_open(AVIOContext **s, const char *filename, int flags) |
de6d9b64 |
{ |
1dee0aca |
return avio_open2(s, filename, flags, NULL, NULL);
}
|
1dba8371 |
int ffio_open_whitelist(AVIOContext **s, const char *filename, int flags,
const AVIOInterruptCB *int_cb, AVDictionary **options, |
93629735 |
const char *whitelist, const char *blacklist |
1dba8371 |
) |
1dee0aca |
{ |
de6d9b64 |
URLContext *h;
int err;
|
f8e89d8a |
err = ffurl_open_whitelist(&h, filename, flags, int_cb, options, whitelist, blacklist, NULL); |
de6d9b64 |
if (err < 0)
return err; |
724f6a0f |
err = ffio_fdopen(s, h); |
de6d9b64 |
if (err < 0) { |
e52a9145 |
ffurl_close(h); |
de6d9b64 |
return err;
}
return 0;
}
|
1dba8371 |
int avio_open2(AVIOContext **s, const char *filename, int flags,
const AVIOInterruptCB *int_cb, AVDictionary **options)
{ |
93629735 |
return ffio_open_whitelist(s, filename, flags, int_cb, options, NULL, NULL); |
1dba8371 |
}
|
541d75f9 |
int ffio_open2_wrapper(struct AVFormatContext *s, AVIOContext **pb, const char *url, int flags,
const AVIOInterruptCB *int_cb, AVDictionary **options)
{ |
93629735 |
return ffio_open_whitelist(pb, url, flags, int_cb, options, s->protocol_whitelist, s->protocol_blacklist); |
541d75f9 |
}
|
ebb92e07 |
int avio_close(AVIOContext *s) |
de6d9b64 |
{ |
cae448cf |
AVIOInternal *internal; |
e1e146a2 |
URLContext *h;
if (!s)
return 0; |
115329f1 |
|
72521354 |
avio_flush(s); |
cae448cf |
internal = s->opaque;
h = internal->h;
av_freep(&s->opaque); |
30939390 |
av_freep(&s->buffer); |
ad6a50c0 |
if (s->write_flag)
av_log(s, AV_LOG_DEBUG, "Statistics: %d seeks, %d writeouts\n", s->seek_count, s->writeout_count);
else |
11153a93 |
av_log(s, AV_LOG_DEBUG, "Statistics: %"PRId64" bytes read, %d seeks\n", s->bytes_read, s->seek_count); |
8fac0d64 |
av_opt_free(s); |
b12e4d3b |
avio_context_free(&s);
|
e52a9145 |
return ffurl_close(h); |
de6d9b64 |
}
|
b522000e |
int avio_closep(AVIOContext **s)
{
int ret = avio_close(*s);
*s = NULL;
return ret;
}
|
d9d86e00 |
int avio_printf(AVIOContext *s, const char *fmt, ...) |
abba3dd1 |
{
va_list ap; |
baf4c489 |
char buf[4096]; /* update doc entry in avio.h if changed */ |
abba3dd1 |
int ret;
va_start(ap, fmt);
ret = vsnprintf(buf, sizeof(buf), fmt, ap);
va_end(ap); |
e9eb8d0b |
avio_write(s, buf, strlen(buf)); |
abba3dd1 |
return ret;
}
|
ff1ec0c3 |
int avio_pause(AVIOContext *s, int pause) |
e7e4810a |
{
if (!s->read_pause)
return AVERROR(ENOSYS); |
502bdf68 |
return s->read_pause(s->opaque, pause); |
e7e4810a |
}
|
ff1ec0c3 |
int64_t avio_seek_time(AVIOContext *s, int stream_index, |
933e90a6 |
int64_t timestamp, int flags) |
e7e4810a |
{ |
bc5c918e |
int64_t ret; |
e7e4810a |
if (!s->read_seek)
return AVERROR(ENOSYS); |
cae448cf |
ret = s->read_seek(s->opaque, stream_index, timestamp, flags); |
1dd1c1c8 |
if (ret >= 0) { |
c007c687 |
int64_t pos; |
e7e4810a |
s->buf_ptr = s->buf_end; // Flush buffer |
cae448cf |
pos = s->seek(s->opaque, 0, SEEK_CUR); |
c007c687 |
if (pos >= 0)
s->pos = pos;
else if (pos != AVERROR(ENOSYS))
ret = pos; |
e7e4810a |
}
return ret;
}
|
8a4c0866 |
int avio_read_to_bprint(AVIOContext *h, AVBPrint *pb, size_t max_size)
{
int ret;
char buf[1024];
while (max_size) {
ret = avio_read(h, buf, FFMIN(max_size, sizeof(buf)));
if (ret == AVERROR_EOF)
return 0;
if (ret <= 0)
return ret;
av_bprint_append_data(pb, buf, ret);
if (!av_bprint_is_complete(pb))
return AVERROR(ENOMEM);
max_size -= ret;
}
return 0;
}
|
63c07a95 |
int avio_accept(AVIOContext *s, AVIOContext **c)
{
int ret; |
d0be0cbe |
AVIOInternal *internal = s->opaque;
URLContext *sc = internal->h; |
63c07a95 |
URLContext *cc = NULL;
ret = ffurl_accept(sc, &cc);
if (ret < 0)
return ret;
return ffio_fdopen(c, cc);
}
int avio_handshake(AVIOContext *c)
{ |
d0be0cbe |
AVIOInternal *internal = c->opaque;
URLContext *cc = internal->h; |
63c07a95 |
return ffurl_handshake(cc);
}
|
abba3dd1 |
/* output in a dynamic buffer */
typedef struct DynBuffer {
int pos, size, allocated_size; |
0c1a9eda |
uint8_t *buffer; |
abba3dd1 |
int io_buffer_size; |
0c1a9eda |
uint8_t io_buffer[1]; |
abba3dd1 |
} DynBuffer;
|
576ae256 |
static int dyn_buf_write(void *opaque, uint8_t *buf, int buf_size) |
abba3dd1 |
{
DynBuffer *d = opaque; |
6bc03a69 |
unsigned new_size, new_allocated_size; |
115329f1 |
|
abba3dd1 |
/* reallocate buffer if needed */
new_size = d->pos + buf_size;
new_allocated_size = d->allocated_size; |
1dd1c1c8 |
if (new_size < d->pos || new_size > INT_MAX/2) |
568e18b1 |
return -1; |
abba3dd1 |
while (new_size > new_allocated_size) {
if (!new_allocated_size)
new_allocated_size = new_size;
else |
115329f1 |
new_allocated_size += new_allocated_size / 2 + 1; |
abba3dd1 |
} |
115329f1 |
|
abba3dd1 |
if (new_allocated_size > d->allocated_size) { |
5626f994 |
int err; |
d872fb0f |
if ((err = av_reallocp(&d->buffer, new_allocated_size)) < 0) {
d->allocated_size = 0;
d->size = 0; |
5626f994 |
return err; |
d872fb0f |
} |
abba3dd1 |
d->allocated_size = new_allocated_size;
}
memcpy(d->buffer + d->pos, buf, buf_size);
d->pos = new_size;
if (d->pos > d->size)
d->size = d->pos; |
576ae256 |
return buf_size; |
abba3dd1 |
}
|
576ae256 |
static int dyn_packet_buf_write(void *opaque, uint8_t *buf, int buf_size) |
abba3dd1 |
{
unsigned char buf1[4]; |
576ae256 |
int ret; |
abba3dd1 |
/* packetized write: output the header */ |
aa805f94 |
AV_WB32(buf1, buf_size); |
1dd1c1c8 |
ret = dyn_buf_write(opaque, buf1, 4);
if (ret < 0) |
576ae256 |
return ret; |
abba3dd1 |
/* then the data */ |
576ae256 |
return dyn_buf_write(opaque, buf, buf_size); |
abba3dd1 |
}
|
bc5c918e |
static int64_t dyn_buf_seek(void *opaque, int64_t offset, int whence) |
abba3dd1 |
{
DynBuffer *d = opaque;
if (whence == SEEK_CUR)
offset += d->pos;
else if (whence == SEEK_END)
offset += d->size;
if (offset < 0 || offset > 0x7fffffffLL)
return -1;
d->pos = offset;
return 0;
}
|
471fe57e |
static int url_open_dyn_buf_internal(AVIOContext **s, int max_packet_size) |
abba3dd1 |
{
DynBuffer *d; |
0c5a43d6 |
unsigned io_buffer_size = max_packet_size ? max_packet_size : 1024; |
115329f1 |
|
1dd1c1c8 |
if (sizeof(DynBuffer) + io_buffer_size < io_buffer_size) |
568e18b1 |
return -1; |
dc2c2eea |
d = av_mallocz(sizeof(DynBuffer) + io_buffer_size); |
abba3dd1 |
if (!d) |
0e7ceb24 |
return AVERROR(ENOMEM); |
8bea72f7 |
d->io_buffer_size = io_buffer_size;
*s = avio_alloc_context(d->io_buffer, d->io_buffer_size, 1, d, NULL,
max_packet_size ? dyn_packet_buf_write : dyn_buf_write,
max_packet_size ? NULL : dyn_buf_seek); |
899681cd |
if(!*s) {
av_free(d);
return AVERROR(ENOMEM);
} |
8bea72f7 |
(*s)->max_packet_size = max_packet_size;
return 0; |
abba3dd1 |
}
|
b92c5452 |
int avio_open_dyn_buf(AVIOContext **s) |
abba3dd1 |
{
return url_open_dyn_buf_internal(s, 0);
}
|
403ee835 |
int ffio_open_dyn_packet_buf(AVIOContext **s, int max_packet_size) |
abba3dd1 |
{
if (max_packet_size <= 0)
return -1;
return url_open_dyn_buf_internal(s, max_packet_size);
}
|
9488032e |
int avio_get_dyn_buf(AVIOContext *s, uint8_t **pbuffer)
{
DynBuffer *d;
if (!s) {
*pbuffer = NULL;
return 0;
}
avio_flush(s);
d = s->opaque;
*pbuffer = d->buffer;
return d->size;
}
|
6dc7d80d |
int avio_close_dyn_buf(AVIOContext *s, uint8_t **pbuffer) |
abba3dd1 |
{ |
7441d1ec |
DynBuffer *d; |
abba3dd1 |
int size; |
059a9348 |
static const char padbuf[AV_INPUT_BUFFER_PADDING_SIZE] = {0}; |
de1807bb |
int padding = 0;
|
d07b51bf |
if (!s) {
*pbuffer = NULL;
return 0;
}
|
de1807bb |
/* don't attempt to pad fixed-size packet buffers */
if (!s->max_packet_size) { |
e9eb8d0b |
avio_write(s, padbuf, sizeof(padbuf)); |
059a9348 |
padding = AV_INPUT_BUFFER_PADDING_SIZE; |
de1807bb |
} |
abba3dd1 |
|
b7f2fdde |
avio_flush(s); |
abba3dd1 |
|
d7f530b0 |
d = s->opaque; |
abba3dd1 |
*pbuffer = d->buffer;
size = d->size;
av_free(d); |
b12e4d3b |
avio_context_free(&s);
|
de1807bb |
return size - padding; |
abba3dd1 |
} |
3627ce2f |
|
8a273a74 |
void ffio_free_dyn_buf(AVIOContext **s)
{
uint8_t *tmp;
if (!*s)
return;
avio_close_dyn_buf(*s, &tmp);
av_free(tmp);
*s = NULL;
}
|
3627ce2f |
static int null_buf_write(void *opaque, uint8_t *buf, int buf_size)
{
DynBuffer *d = opaque;
d->pos += buf_size;
if (d->pos > d->size)
d->size = d->pos;
return buf_size;
}
int ffio_open_null_buf(AVIOContext **s)
{
int ret = url_open_dyn_buf_internal(s, 0);
if (ret >= 0) {
AVIOContext *pb = *s;
pb->write_packet = null_buf_write;
}
return ret;
}
int ffio_close_null_buf(AVIOContext *s)
{
DynBuffer *d = s->opaque;
int size;
avio_flush(s);
size = d->size;
av_free(d); |
b12e4d3b |
avio_context_free(&s);
|
3627ce2f |
return size;
} |