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authorwm4 <wm4@nowhere>2013-06-27 17:21:46 +0200
committerwm4 <wm4@nowhere>2013-06-28 15:40:15 +0200
commit1327eeb375064573d5b9b3657958614ab297c2b1 (patch)
tree9d5c3d4e79ac14679315fe33514ea1716c22481f /stream/stream_memory.c
parentf296258de0bb43363f45941b3d01b3cf63a8c1bd (diff)
downloadmpv-1327eeb375064573d5b9b3657958614ab297c2b1.tar.bz2
mpv-1327eeb375064573d5b9b3657958614ab297c2b1.tar.xz
stream: redo memory streams
Make memory streams actual streams. This causes fewer weird corner cases and actually allows using demuxers with them.
Diffstat (limited to 'stream/stream_memory.c')
-rw-r--r--stream/stream_memory.c84
1 files changed, 84 insertions, 0 deletions
diff --git a/stream/stream_memory.c b/stream/stream_memory.c
new file mode 100644
index 0000000000..0994e0816f
--- /dev/null
+++ b/stream/stream_memory.c
@@ -0,0 +1,84 @@
+/*
+ * This file is part of mpv.
+ *
+ * mpv is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * mpv 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 General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with mpv. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <libavutil/common.h>
+
+#include "stream.h"
+
+struct priv {
+ bstr data;
+};
+
+static int fill_buffer(stream_t *s, char* buffer, int len)
+{
+ struct priv *p = s->priv;
+ bstr data = p->data;
+ if (s->pos < 0 || s->pos > data.len)
+ return 0;
+ len = FFMIN(len, data.len - s->pos);
+ memcpy(buffer, data.start + s->pos, len);
+ return len;
+}
+
+static int seek(stream_t *s, int64_t newpos)
+{
+ s->pos = newpos;
+ return 1;
+}
+
+static int control(stream_t *s, int cmd, void *arg)
+{
+ struct priv *p = s->priv;
+ switch(cmd) {
+ case STREAM_CTRL_SET_CONTENTS: ;
+ bstr *data = (bstr *)arg;
+ talloc_free(p->data.start);
+ p->data = bstrdup(s, *data);
+ s->end_pos = p->data.len;
+ return 1;
+ }
+ return STREAM_UNSUPPORTED;
+}
+
+static int open_f(stream_t *stream, int mode, void* opts, int* file_format)
+{
+ stream->type = STREAMTYPE_MEMORY;
+
+ stream->fill_buffer = fill_buffer;
+ stream->seek = seek;
+ stream->control = control;
+ stream->read_chunk = 1024 * 1024;
+
+ struct priv *p = talloc_zero(stream, struct priv);
+ stream->priv = p;
+
+ // Initial data
+ bstr data = bstr0(stream->url);
+ bstr_eatstart0(&data, "memory://");
+ stream_control(stream, STREAM_CTRL_SET_CONTENTS, &data);
+
+ return STREAM_OK;
+}
+
+const stream_info_t stream_info_memory = {
+ "Memory",
+ "memory",
+ "",
+ "",
+ open_f,
+ { "memory", NULL },
+};