Add a function to parse Dirac's sequence header

Originally committed as revision 21127 to svn://svn.ffmpeg.org/ffmpeg/trunk

1 files changed, 57 insertions, 0 deletions

diff --git a/libavcodec/dirac.h b/libavcodec/dirac.h
new file mode 100644
index 0000000000..5a53bd431e
--- /dev/null
+++ b/libavcodec/dirac.h
@@ -0,0 +1,57 @@
+/*
+ * Copyright (C) 2007 Marco Gerards <marco@gnu.org>
+ * Copyright (C) 2009 David Conrad
+ *
+ * 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_DIRAC_H
+#define AVCODEC_DIRAC_H
+
+/**
+ * @file libavcodec/dirac.h
+ * Interfaces to Dirac Decoder/Encoder
+ * @author Marco Gerards <marco@gnu.org>
+ */
+
+#include "avcodec.h"
+#include "get_bits.h"
+
+typedef struct {
+    unsigned width;
+    unsigned height;
+    uint8_t chroma_format;          ///< 0: 444  1: 422  2: 420
+
+    uint8_t interlaced;
+    uint8_t top_field_first;
+
+    uint8_t frame_rate_index;       ///< index into dirac_frame_rate[]
+    uint8_t aspect_ratio_index;     ///< index into dirac_aspect_ratio[]
+
+    uint16_t clean_width;
+    uint16_t clean_height;
+    uint16_t clean_left_offset;
+    uint16_t clean_right_offset;
+
+    uint8_t pixel_range_index;      ///< index into dirac_pixel_range_presets[]
+    uint8_t color_spec_index;       ///< index into dirac_color_spec_presets[]
+} dirac_source_params;
+
+int ff_dirac_parse_sequence_header(AVCodecContext *avctx, GetBitContext *gb,
+                                   dirac_source_params *source);
+
+#endif /* AVCODEC_DIRAC_H */