0,0 → 1,118 |
/* |
* Copyright (c) 2012 Nicolas George |
* |
* This file is part of FFmpeg. |
* |
* FFmpeg is free software; you can redistribute it and/or |
* modify it under the terms of the GNU Lesser General Public License |
* as published by the Free Software Foundation; either |
* version 2.1 of the License, or (at your option) any later version. |
* |
* FFmpeg is distributed in the hope that it will be useful, |
* but WITHOUT ANY WARRANTY; without even the implied warranty of |
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
* GNU Lesser General Public License for more details. |
* |
* You should have received a copy of the GNU Lesser General Public License |
* along with FFmpeg; if not, write to the Free Software Foundation, Inc., |
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
*/ |
|
#include <string.h> |
#include "libavutil/avstring.h" |
#include "libavutil/base64.h" |
#include "url.h" |
|
typedef struct { |
const uint8_t *data; |
void *tofree; |
size_t size; |
size_t pos; |
} DataContext; |
|
static av_cold int data_open(URLContext *h, const char *uri, int flags) |
{ |
DataContext *dc = h->priv_data; |
const char *data, *opt, *next; |
char *ddata; |
int ret, base64 = 0; |
size_t in_size; |
|
/* data:content/type[;base64],payload */ |
|
av_strstart(uri, "data:", &uri); |
data = strchr(uri, ','); |
if (!data) { |
av_log(h, AV_LOG_ERROR, "No ',' delimiter in URI\n"); |
return AVERROR(EINVAL); |
} |
opt = uri; |
while (opt < data) { |
next = av_x_if_null(memchr(opt, ';', data - opt), data); |
if (opt == uri) { |
if (!memchr(opt, '/', next - opt)) { /* basic validity check */ |
av_log(h, AV_LOG_ERROR, "Invalid content-type '%.*s'\n", |
(int)(next - opt), opt); |
return AVERROR(EINVAL); |
} |
av_log(h, AV_LOG_VERBOSE, "Content-type: %.*s\n", |
(int)(next - opt), opt); |
} else { |
if (!av_strncasecmp(opt, "base64", next - opt)) { |
base64 = 1; |
} else { |
av_log(h, AV_LOG_VERBOSE, "Ignoring option '%.*s'\n", |
(int)(next - opt), opt); |
} |
} |
opt = next + 1; |
} |
|
data++; |
in_size = strlen(data); |
if (base64) { |
size_t out_size = 3 * (in_size / 4) + 1; |
|
if (out_size > INT_MAX || !(ddata = av_malloc(out_size))) |
return AVERROR(ENOMEM); |
if ((ret = av_base64_decode(ddata, data, out_size)) < 0) { |
av_free(ddata); |
av_log(h, AV_LOG_ERROR, "Invalid base64 in URI\n"); |
return ret; |
} |
dc->data = dc->tofree = ddata; |
dc->size = ret; |
} else { |
dc->data = data; |
dc->size = in_size; |
} |
return 0; |
} |
|
static av_cold int data_close(URLContext *h) |
{ |
DataContext *dc = h->priv_data; |
|
av_freep(&dc->tofree); |
return 0; |
} |
|
static int data_read(URLContext *h, unsigned char *buf, int size) |
{ |
DataContext *dc = h->priv_data; |
|
if (dc->pos >= dc->size) |
return AVERROR_EOF; |
size = FFMIN(size, dc->size - dc->pos); |
memcpy(buf, dc->data + dc->pos, size); |
dc->pos += size; |
return size; |
} |
|
URLProtocol ff_data_protocol = { |
.name = "data", |
.url_open = data_open, |
.url_close = data_close, |
.url_read = data_read, |
.priv_data_size = sizeof(DataContext), |
}; |