Move dvdsub parser to its own file.

Originally committed as revision 8910 to svn://svn.ffmpeg.org/ffmpeg/trunk

1 files changed, 81 insertions, 0 deletions

diff --git a/libavcodec/dvdsub_parser.c b/libavcodec/dvdsub_parser.c
new file mode 100644
index 0000000000..a823ab9f3b
--- /dev/null
+++ b/libavcodec/dvdsub_parser.c
@@ -0,0 +1,81 @@
+/*
+ * DVD subtitle decoding for ffmpeg
+ * Copyright (c) 2005 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 "avcodec.h"
+
+/* parser definition */
+typedef struct DVDSubParseContext {
+    uint8_t *packet;
+    int packet_len;
+    int packet_index;
+} DVDSubParseContext;
+
+static int dvdsub_parse_init(AVCodecParserContext *s)
+{
+    return 0;
+}
+
+static int dvdsub_parse(AVCodecParserContext *s,
+                        AVCodecContext *avctx,
+                        uint8_t **poutbuf, int *poutbuf_size,
+                        const uint8_t *buf, int buf_size)
+{
+    DVDSubParseContext *pc = s->priv_data;
+
+    if (pc->packet_index == 0) {
+        if (buf_size < 2)
+            return 0;
+        pc->packet_len = AV_RB16(buf);
+        av_freep(&pc->packet);
+        pc->packet = av_malloc(pc->packet_len);
+    }
+    if (pc->packet) {
+        if (pc->packet_index + buf_size <= pc->packet_len) {
+            memcpy(pc->packet + pc->packet_index, buf, buf_size);
+            pc->packet_index += buf_size;
+            if (pc->packet_index >= pc->packet_len) {
+                *poutbuf = pc->packet;
+                *poutbuf_size = pc->packet_len;
+                pc->packet_index = 0;
+                return buf_size;
+            }
+        } else {
+            /* erroneous size */
+            pc->packet_index = 0;
+        }
+    }
+    *poutbuf = NULL;
+    *poutbuf_size = 0;
+    return buf_size;
+}
+
+static void dvdsub_parse_close(AVCodecParserContext *s)
+{
+    DVDSubParseContext *pc = s->priv_data;
+    av_freep(&pc->packet);
+}
+
+AVCodecParser dvdsub_parser = {
+    { CODEC_ID_DVD_SUBTITLE },
+    sizeof(DVDSubParseContext),
+    dvdsub_parse_init,
+    dvdsub_parse,
+    dvdsub_parse_close,
+};