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https://github.com/FFmpeg/FFmpeg.git
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790f793844
There are lots of files that don't need it: The number of object files that actually need it went down from 2011 to 884 here. Keep it for external users in order to not cause breakages. Also improve the other headers a bit while just at it. Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>
121 lines
3.4 KiB
C
121 lines
3.4 KiB
C
/*
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* Copyright (c) 2012 Nicolas George
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*
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* This file is part of FFmpeg.
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*
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* FFmpeg is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public License
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* as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* 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
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public License
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* along with FFmpeg; if not, write to the Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#include <string.h>
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#include "libavutil/avstring.h"
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#include "libavutil/avutil.h"
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#include "libavutil/base64.h"
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#include "libavutil/mem.h"
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#include "url.h"
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typedef struct {
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const uint8_t *data;
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void *tofree;
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size_t size;
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size_t pos;
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} DataContext;
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static av_cold int data_open(URLContext *h, const char *uri, int flags)
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{
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DataContext *dc = h->priv_data;
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const char *data, *opt, *next;
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char *ddata;
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int ret, base64 = 0;
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size_t in_size;
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/* data:content/type[;base64],payload */
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av_strstart(uri, "data:", &uri);
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data = strchr(uri, ',');
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if (!data) {
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av_log(h, AV_LOG_ERROR, "No ',' delimiter in URI\n");
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return AVERROR(EINVAL);
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}
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opt = uri;
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while (opt < data) {
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next = av_x_if_null(memchr(opt, ';', data - opt), data);
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if (opt == uri) {
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if (!memchr(opt, '/', next - opt)) { /* basic validity check */
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av_log(h, AV_LOG_ERROR, "Invalid content-type '%.*s'\n",
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(int)(next - opt), opt);
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return AVERROR(EINVAL);
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}
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av_log(h, AV_LOG_VERBOSE, "Content-type: %.*s\n",
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(int)(next - opt), opt);
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} else {
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if (!av_strncasecmp(opt, "base64", next - opt)) {
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base64 = 1;
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} else {
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av_log(h, AV_LOG_VERBOSE, "Ignoring option '%.*s'\n",
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(int)(next - opt), opt);
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}
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}
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opt = next + 1;
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}
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data++;
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in_size = strlen(data);
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if (base64) {
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size_t out_size = 3 * (in_size / 4) + 1;
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if (out_size > INT_MAX || !(ddata = av_malloc(out_size)))
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return AVERROR(ENOMEM);
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if ((ret = av_base64_decode(ddata, data, out_size)) < 0) {
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av_free(ddata);
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av_log(h, AV_LOG_ERROR, "Invalid base64 in URI\n");
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return ret;
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}
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dc->data = dc->tofree = ddata;
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dc->size = ret;
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} else {
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dc->data = data;
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dc->size = in_size;
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}
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return 0;
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}
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static av_cold int data_close(URLContext *h)
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{
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DataContext *dc = h->priv_data;
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av_freep(&dc->tofree);
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return 0;
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}
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static int data_read(URLContext *h, unsigned char *buf, int size)
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{
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DataContext *dc = h->priv_data;
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if (dc->pos >= dc->size)
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return AVERROR_EOF;
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size = FFMIN(size, dc->size - dc->pos);
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memcpy(buf, dc->data + dc->pos, size);
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dc->pos += size;
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return size;
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}
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const URLProtocol ff_data_protocol = {
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.name = "data",
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.url_open = data_open,
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.url_close = data_close,
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.url_read = data_read,
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.priv_data_size = sizeof(DataContext),
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};
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