adding ffmpeg specific version

1 files changed, 76 insertions, 0 deletions

diff --git a/ffmpeg1/libavcodec/mpeg12.h b/ffmpeg1/libavcodec/mpeg12.h
new file mode 100644
index 0000000..1f36917
--- /dev/null
+++ b/ffmpeg1/libavcodec/mpeg12.h
@@ -0,0 +1,76 @@
+/*
+ * MPEG1/2 common code
+ * Copyright (c) 2007 Aurelien Jacobs <aurel@gnuage.org>
+ *
+ * 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 AVCODEC_MPEG12_H
+#define AVCODEC_MPEG12_H
+
+#include "mpegvideo.h"
+
+#define DC_VLC_BITS 9
+#define TEX_VLC_BITS 9
+
+extern VLC ff_dc_lum_vlc;
+extern VLC ff_dc_chroma_vlc;
+
+typedef struct Mpeg1Context {
+    MpegEncContext mpeg_enc_ctx;
+    int mpeg_enc_ctx_allocated; /* true if decoding context allocated */
+    int repeat_field; /* true if we must repeat the field */
+    AVPanScan pan_scan;              /**< some temporary storage for the panscan */
+    int slice_count;
+    int swap_uv;//indicate VCR2
+    int save_aspect_info;
+    int save_width, save_height, save_progressive_seq;
+    AVRational frame_rate_ext;       ///< MPEG-2 specific framerate modificator
+    int sync;                        ///< Did we reach a sync point like a GOP/SEQ/KEYFrame?
+    int tmpgexs;
+    int extradata_decoded;
+} Mpeg1Context;
+
+extern uint8_t ff_mpeg12_static_rl_table_store[2][2][2*MAX_RUN + MAX_LEVEL + 3];
+
+void ff_mpeg12_common_init(MpegEncContext *s);
+void ff_mpeg12_init_vlcs(void);
+
+static inline int decode_dc(GetBitContext *gb, int component)
+{
+    int code, diff;
+
+    if (component == 0) {
+        code = get_vlc2(gb, ff_dc_lum_vlc.table, DC_VLC_BITS, 2);
+    } else {
+        code = get_vlc2(gb, ff_dc_chroma_vlc.table, DC_VLC_BITS, 2);
+    }
+    if (code < 0){
+        av_log(NULL, AV_LOG_ERROR, "invalid dc code at\n");
+        return 0xffff;
+    }
+    if (code == 0) {
+        diff = 0;
+    } else {
+        diff = get_xbits(gb, code);
+    }
+    return diff;
+}
+
+extern int ff_mpeg1_decode_block_intra(MpegEncContext *s, int16_t *block, int n);
+
+#endif /* AVCODEC_MPEG12_H */