move AVCodecParser prototypes and definitions to parser.h, and move mpegvideo parser to mpeg12.c

Originally committed as revision 6914 to svn://svn.ffmpeg.org/ffmpeg/trunk

libavcodec/parser.h

@@ -0,0 +1,64 @@
+/*
+ * AVCodecParser prototypes and definitions
+ * Copyright (c) 2003 Fabrice Bellard.
+ * Copyright (c) 2003 Michael Niedermayer.
+ *
+ * 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
+ */
+
+#ifndef FFMPEG_PARSER_H
+#define FFMPEG_PARSER_H
+
+typedef struct ParseContext{
+    uint8_t *buffer;
+    int index;
+    int last_index;
+    unsigned int buffer_size;
+    uint32_t state;             ///< contains the last few bytes in MSB order
+    int frame_start_found;
+    int overread;               ///< the number of bytes which where irreversibly read from the next frame
+    int overread_index;         ///< the index into ParseContext.buffer of the overreaded bytes
+} ParseContext;
+
+struct MpegEncContext;
+
+typedef struct ParseContext1{
+    ParseContext pc;
+/* XXX/FIXME PC1 vs. PC */
+    /* MPEG2 specific */
+    AVRational frame_rate;
+    int progressive_sequence;
+    int width, height;
+
+    /* XXX: suppress that, needed by MPEG4 */
+    struct MpegEncContext *enc;
+    int first_picture;
+} ParseContext1;
+
+#define END_NOT_FOUND (-100)
+
+int ff_combine_frame(ParseContext *pc, int next, uint8_t **buf, int *buf_size);
+void ff_parse_close(AVCodecParserContext *s);
+void ff_parse1_close(AVCodecParserContext *s);
+
+/* h263dec.c */
+int ff_mpeg4_find_frame_end(ParseContext *pc, const uint8_t *buf, int buf_size);
+
+/* cavs.c */
+int ff_cavs_find_frame_end(ParseContext *pc, const uint8_t *buf, int buf_size);
+
+#endif /* !FFMPEG_PARSER_H */