| Line | Branch | Exec | Source |
|---|---|---|---|
| 1 | /* | ||
| 2 | * Copyright (c) 2012 Nicolas George | ||
| 3 | * | ||
| 4 | * This file is part of FFmpeg. | ||
| 5 | * | ||
| 6 | * FFmpeg is free software; you can redistribute it and/or | ||
| 7 | * modify it under the terms of the GNU Lesser General Public License | ||
| 8 | * as published by the Free Software Foundation; either | ||
| 9 | * version 2.1 of the License, or (at your option) any later version. | ||
| 10 | * | ||
| 11 | * FFmpeg is distributed in the hope that it will be useful, | ||
| 12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | ||
| 13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | ||
| 14 | * GNU Lesser General Public License for more details. | ||
| 15 | * | ||
| 16 | * You should have received a copy of the GNU Lesser General Public License | ||
| 17 | * along with FFmpeg; if not, write to the Free Software Foundation, Inc., | ||
| 18 | * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA | ||
| 19 | */ | ||
| 20 | |||
| 21 | #include <string.h> | ||
| 22 | #include "libavutil/avstring.h" | ||
| 23 | #include "libavutil/avutil.h" | ||
| 24 | #include "libavutil/base64.h" | ||
| 25 | #include "libavutil/mem.h" | ||
| 26 | #include "url.h" | ||
| 27 | |||
| 28 | typedef struct { | ||
| 29 | const uint8_t *data; | ||
| 30 | void *tofree; | ||
| 31 | size_t size; | ||
| 32 | size_t pos; | ||
| 33 | } DataContext; | ||
| 34 | |||
| 35 | ✗ | static av_cold int data_open(URLContext *h, const char *uri, int flags) | |
| 36 | { | ||
| 37 | ✗ | DataContext *dc = h->priv_data; | |
| 38 | const char *data, *opt, *next; | ||
| 39 | char *ddata; | ||
| 40 | ✗ | int ret, base64 = 0; | |
| 41 | size_t in_size; | ||
| 42 | |||
| 43 | /* data:content/type[;base64],payload */ | ||
| 44 | |||
| 45 | ✗ | av_strstart(uri, "data:", &uri); | |
| 46 | ✗ | data = strchr(uri, ','); | |
| 47 | ✗ | if (!data) { | |
| 48 | ✗ | av_log(h, AV_LOG_ERROR, "No ',' delimiter in URI\n"); | |
| 49 | ✗ | return AVERROR(EINVAL); | |
| 50 | } | ||
| 51 | ✗ | opt = uri; | |
| 52 | ✗ | while (opt < data) { | |
| 53 | ✗ | next = av_x_if_null(memchr(opt, ';', data - opt), data); | |
| 54 | ✗ | if (opt == uri) { | |
| 55 | ✗ | if (!memchr(opt, '/', next - opt)) { /* basic validity check */ | |
| 56 | ✗ | av_log(h, AV_LOG_ERROR, "Invalid content-type '%.*s'\n", | |
| 57 | ✗ | (int)(next - opt), opt); | |
| 58 | ✗ | return AVERROR(EINVAL); | |
| 59 | } | ||
| 60 | ✗ | av_log(h, AV_LOG_VERBOSE, "Content-type: %.*s\n", | |
| 61 | ✗ | (int)(next - opt), opt); | |
| 62 | } else { | ||
| 63 | ✗ | if (!av_strncasecmp(opt, "base64", next - opt)) { | |
| 64 | ✗ | base64 = 1; | |
| 65 | } else { | ||
| 66 | ✗ | av_log(h, AV_LOG_VERBOSE, "Ignoring option '%.*s'\n", | |
| 67 | ✗ | (int)(next - opt), opt); | |
| 68 | } | ||
| 69 | } | ||
| 70 | ✗ | opt = next + 1; | |
| 71 | } | ||
| 72 | |||
| 73 | ✗ | data++; | |
| 74 | ✗ | in_size = strlen(data); | |
| 75 | ✗ | if (base64) { | |
| 76 | ✗ | size_t out_size = 3 * (in_size / 4) + 1; | |
| 77 | |||
| 78 | ✗ | if (out_size > INT_MAX || !(ddata = av_malloc(out_size))) | |
| 79 | ✗ | return AVERROR(ENOMEM); | |
| 80 | ✗ | if ((ret = av_base64_decode(ddata, data, out_size)) < 0) { | |
| 81 | ✗ | av_free(ddata); | |
| 82 | ✗ | av_log(h, AV_LOG_ERROR, "Invalid base64 in URI\n"); | |
| 83 | ✗ | return ret; | |
| 84 | } | ||
| 85 | ✗ | dc->data = dc->tofree = ddata; | |
| 86 | ✗ | dc->size = ret; | |
| 87 | } else { | ||
| 88 | ✗ | dc->data = data; | |
| 89 | ✗ | dc->size = in_size; | |
| 90 | } | ||
| 91 | ✗ | return 0; | |
| 92 | } | ||
| 93 | |||
| 94 | ✗ | static av_cold int data_close(URLContext *h) | |
| 95 | { | ||
| 96 | ✗ | DataContext *dc = h->priv_data; | |
| 97 | |||
| 98 | ✗ | av_freep(&dc->tofree); | |
| 99 | ✗ | return 0; | |
| 100 | } | ||
| 101 | |||
| 102 | ✗ | static int data_read(URLContext *h, unsigned char *buf, int size) | |
| 103 | { | ||
| 104 | ✗ | DataContext *dc = h->priv_data; | |
| 105 | |||
| 106 | ✗ | if (dc->pos >= dc->size) | |
| 107 | ✗ | return AVERROR_EOF; | |
| 108 | ✗ | size = FFMIN(size, dc->size - dc->pos); | |
| 109 | ✗ | memcpy(buf, dc->data + dc->pos, size); | |
| 110 | ✗ | dc->pos += size; | |
| 111 | ✗ | return size; | |
| 112 | } | ||
| 113 | |||
| 114 | const URLProtocol ff_data_protocol = { | ||
| 115 | .name = "data", | ||
| 116 | .url_open = data_open, | ||
| 117 | .url_close = data_close, | ||
| 118 | .url_read = data_read, | ||
| 119 | .priv_data_size = sizeof(DataContext), | ||
| 120 | }; | ||
| 121 |