diff options
Diffstat (limited to 'ffmpeg/libavformat/concat.c')
| -rw-r--r-- | ffmpeg/libavformat/concat.c | 190 |
1 files changed, 0 insertions, 190 deletions
diff --git a/ffmpeg/libavformat/concat.c b/ffmpeg/libavformat/concat.c deleted file mode 100644 index 3bbc83d..0000000 --- a/ffmpeg/libavformat/concat.c +++ /dev/null @@ -1,190 +0,0 @@ -/* - * Concat URL protocol - * Copyright (c) 2006 Steve Lhomme - * Copyright (c) 2007 Wolfram Gloger - * Copyright (c) 2010 Michele Orrù - * - * 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 "avformat.h" -#include "libavutil/avstring.h" -#include "libavutil/mem.h" -#include "url.h" - -#define AV_CAT_SEPARATOR "|" - -struct concat_nodes { - URLContext *uc; ///< node's URLContext - int64_t size; ///< url filesize -}; - -struct concat_data { - struct concat_nodes *nodes; ///< list of nodes to concat - size_t length; ///< number of cat'ed nodes - size_t current; ///< index of currently read node -}; - -static av_cold int concat_close(URLContext *h) -{ - int err = 0; - size_t i; - struct concat_data *data = h->priv_data; - struct concat_nodes *nodes = data->nodes; - - for (i = 0; i != data->length; i++) - err |= ffurl_close(nodes[i].uc); - - av_freep(&data->nodes); - - return err < 0 ? -1 : 0; -} - -static av_cold int concat_open(URLContext *h, const char *uri, int flags) -{ - char *node_uri = NULL; - int err = 0; - int64_t size; - size_t len, i; - URLContext *uc; - struct concat_data *data = h->priv_data; - struct concat_nodes *nodes; - - av_strstart(uri, "concat:", &uri); - - for (i = 0, len = 1; uri[i]; i++) - if (uri[i] == *AV_CAT_SEPARATOR) - /* integer overflow */ - if (++len == UINT_MAX / sizeof(*nodes)) { - av_freep(&h->priv_data); - return AVERROR(ENAMETOOLONG); - } - - if (!(nodes = av_realloc(NULL, sizeof(*nodes) * len))) { - return AVERROR(ENOMEM); - } else - data->nodes = nodes; - - /* handle input */ - if (!*uri) - err = AVERROR(ENOENT); - for (i = 0; *uri; i++) { - /* parsing uri */ - len = strcspn(uri, AV_CAT_SEPARATOR); - if ((err = av_reallocp(&node_uri, len + 1)) < 0) - break; - av_strlcpy(node_uri, uri, len+1); - uri += len + strspn(uri+len, AV_CAT_SEPARATOR); - - /* creating URLContext */ - if ((err = ffurl_open(&uc, node_uri, flags, - &h->interrupt_callback, NULL)) < 0) - break; - - /* creating size */ - if ((size = ffurl_size(uc)) < 0) { - ffurl_close(uc); - err = AVERROR(ENOSYS); - break; - } - - /* assembling */ - nodes[i].uc = uc; - nodes[i].size = size; - } - av_free(node_uri); - data->length = i; - - if (err < 0) - concat_close(h); - else if (!(nodes = av_realloc(nodes, data->length * sizeof(*nodes)))) { - concat_close(h); - err = AVERROR(ENOMEM); - } else - data->nodes = nodes; - return err; -} - -static int concat_read(URLContext *h, unsigned char *buf, int size) -{ - int result, total = 0; - struct concat_data *data = h->priv_data; - struct concat_nodes *nodes = data->nodes; - size_t i = data->current; - - while (size > 0) { - result = ffurl_read(nodes[i].uc, buf, size); - if (result < 0) - return total ? total : result; - if (!result) - if (i + 1 == data->length || - ffurl_seek(nodes[++i].uc, 0, SEEK_SET) < 0) - break; - total += result; - buf += result; - size -= result; - } - data->current = i; - return total; -} - -static int64_t concat_seek(URLContext *h, int64_t pos, int whence) -{ - int64_t result; - struct concat_data *data = h->priv_data; - struct concat_nodes *nodes = data->nodes; - size_t i; - - switch (whence) { - case SEEK_END: - for (i = data->length - 1; - i && pos < -nodes[i].size; - i--) - pos += nodes[i].size; - break; - case SEEK_CUR: - /* get the absolute position */ - for (i = 0; i != data->current; i++) - pos += nodes[i].size; - pos += ffurl_seek(nodes[i].uc, 0, SEEK_CUR); - whence = SEEK_SET; - /* fall through with the absolute position */ - case SEEK_SET: - for (i = 0; i != data->length - 1 && pos >= nodes[i].size; i++) - pos -= nodes[i].size; - break; - default: - return AVERROR(EINVAL); - } - - result = ffurl_seek(nodes[i].uc, pos, whence); - if (result >= 0) { - data->current = i; - while (i) - result += nodes[--i].size; - } - return result; -} - -URLProtocol ff_concat_protocol = { - .name = "concat", - .url_open = concat_open, - .url_read = concat_read, - .url_seek = concat_seek, - .url_close = concat_close, - .priv_data_size = sizeof(struct concat_data), -}; |