making act segmenter

1 files changed, 218 insertions, 0 deletions

diff --git a/ffmpeg/libavformat/file.c b/ffmpeg/libavformat/file.c
new file mode 100644
index 0000000..e09a64b
--- /dev/null
+++ b/ffmpeg/libavformat/file.c
@@ -0,0 +1,218 @@
+/*
+ * buffered file I/O
+ * Copyright (c) 2001 Fabrice Bellard
+ *
+ * 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 "libavutil/avstring.h"
+#include "libavutil/opt.h"
+#include "avformat.h"
+#include <fcntl.h>
+#if HAVE_IO_H
+#include <io.h>
+#endif
+#if HAVE_UNISTD_H
+#include <unistd.h>
+#endif
+#include <sys/stat.h>
+#include <stdlib.h>
+#include "os_support.h"
+#include "url.h"
+
+/* Some systems may not have S_ISFIFO */
+#ifndef S_ISFIFO
+#  ifdef S_IFIFO
+#    define S_ISFIFO(m) (((m) & S_IFMT) == S_IFIFO)
+#  else
+#    define S_ISFIFO(m) 0
+#  endif
+#endif
+
+/* standard file protocol */
+
+typedef struct FileContext {
+    const AVClass *class;
+    int fd;
+    int trunc;
+} FileContext;
+
+static const AVOption file_options[] = {
+    { "truncate", "Truncate existing files on write", offsetof(FileContext, trunc), AV_OPT_TYPE_INT, { .i64 = 1 }, 0, 1, AV_OPT_FLAG_ENCODING_PARAM },
+    { NULL }
+};
+
+static const AVClass file_class = {
+    .class_name = "file",
+    .item_name  = av_default_item_name,
+    .option     = file_options,
+    .version    = LIBAVUTIL_VERSION_INT,
+};
+
+static int file_read(URLContext *h, unsigned char *buf, int size)
+{
+    FileContext *c = h->priv_data;
+    int r = read(c->fd, buf, size);
+    return (-1 == r)?AVERROR(errno):r;
+}
+
+static int file_write(URLContext *h, const unsigned char *buf, int size)
+{
+    FileContext *c = h->priv_data;
+    int r = write(c->fd, buf, size);
+    return (-1 == r)?AVERROR(errno):r;
+}
+
+static int file_get_handle(URLContext *h)
+{
+    FileContext *c = h->priv_data;
+    return c->fd;
+}
+
+static int file_check(URLContext *h, int mask)
+{
+#if HAVE_ACCESS && defined(R_OK)
+    int ret = 0;
+    if (access(h->filename, F_OK) < 0)
+        return AVERROR(errno);
+    if (mask&AVIO_FLAG_READ)
+        if (access(h->filename, R_OK) >= 0)
+            ret |= AVIO_FLAG_READ;
+    if (mask&AVIO_FLAG_WRITE)
+        if (access(h->filename, W_OK) >= 0)
+            ret |= AVIO_FLAG_WRITE;
+#else
+    struct stat st;
+    int ret = stat(h->filename, &st);
+    if (ret < 0)
+        return AVERROR(errno);
+
+    ret |= st.st_mode&S_IRUSR ? mask&AVIO_FLAG_READ  : 0;
+    ret |= st.st_mode&S_IWUSR ? mask&AVIO_FLAG_WRITE : 0;
+#endif
+    return ret;
+}
+
+#if CONFIG_FILE_PROTOCOL
+
+static int file_open(URLContext *h, const char *filename, int flags)
+{
+    FileContext *c = h->priv_data;
+    int access;
+    int fd;
+    struct stat st;
+
+    av_strstart(filename, "file:", &filename);
+
+    if (flags & AVIO_FLAG_WRITE && flags & AVIO_FLAG_READ) {
+        access = O_CREAT | O_RDWR;
+        if (c->trunc)
+            access |= O_TRUNC;
+    } else if (flags & AVIO_FLAG_WRITE) {
+        access = O_CREAT | O_WRONLY;
+        if (c->trunc)
+            access |= O_TRUNC;
+    } else {
+        access = O_RDONLY;
+    }
+#ifdef O_BINARY
+    access |= O_BINARY;
+#endif
+    fd = open(filename, access, 0666);
+    if (fd == -1)
+        return AVERROR(errno);
+    c->fd = fd;
+
+    h->is_streamed = !fstat(fd, &st) && S_ISFIFO(st.st_mode);
+
+    return 0;
+}
+
+/* XXX: use llseek */
+static int64_t file_seek(URLContext *h, int64_t pos, int whence)
+{
+    FileContext *c = h->priv_data;
+    int64_t ret;
+
+    if (whence == AVSEEK_SIZE) {
+        struct stat st;
+        ret = fstat(c->fd, &st);
+        return ret < 0 ? AVERROR(errno) : (S_ISFIFO(st.st_mode) ? 0 : st.st_size);
+    }
+
+    ret = lseek(c->fd, pos, whence);
+
+    return ret < 0 ? AVERROR(errno) : ret;
+}
+
+static int file_close(URLContext *h)
+{
+    FileContext *c = h->priv_data;
+    return close(c->fd);
+}
+
+URLProtocol ff_file_protocol = {
+    .name                = "file",
+    .url_open            = file_open,
+    .url_read            = file_read,
+    .url_write           = file_write,
+    .url_seek            = file_seek,
+    .url_close           = file_close,
+    .url_get_file_handle = file_get_handle,
+    .url_check           = file_check,
+    .priv_data_size      = sizeof(FileContext),
+    .priv_data_class     = &file_class,
+};
+
+#endif /* CONFIG_FILE_PROTOCOL */
+
+#if CONFIG_PIPE_PROTOCOL
+
+static int pipe_open(URLContext *h, const char *filename, int flags)
+{
+    FileContext *c = h->priv_data;
+    int fd;
+    char *final;
+    av_strstart(filename, "pipe:", &filename);
+
+    fd = strtol(filename, &final, 10);
+    if((filename == final) || *final ) {/* No digits found, or something like 10ab */
+        if (flags & AVIO_FLAG_WRITE) {
+            fd = 1;
+        } else {
+            fd = 0;
+        }
+    }
+#if HAVE_SETMODE
+    setmode(fd, O_BINARY);
+#endif
+    c->fd = fd;
+    h->is_streamed = 1;
+    return 0;
+}
+
+URLProtocol ff_pipe_protocol = {
+    .name                = "pipe",
+    .url_open            = pipe_open,
+    .url_read            = file_read,
+    .url_write           = file_write,
+    .url_get_file_handle = file_get_handle,
+    .url_check           = file_check,
+    .priv_data_size      = sizeof(FileContext),
+};
+
+#endif /* CONFIG_PIPE_PROTOCOL */