mirror of https://github.com/FFmpeg/FFmpeg.git
parent
ba1cbf40ce
commit
ecda1d3cbe
6 changed files with 132 additions and 2 deletions
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/*
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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/base64.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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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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