Hap decoder and encoder

Signed-off-by: Vittorio Giovara <vittorio.giovara@gmail.com>

1 files changed, 65 insertions, 0 deletions

diff --git a/libavcodec/hap.h b/libavcodec/hap.h
new file mode 100644
index 0000000000..1250a6f683
--- /dev/null
+++ b/libavcodec/hap.h
@@ -0,0 +1,65 @@
+/*
+ * Vidvox Hap
+ * Copyright (C) 2015 Vittorio Giovara <vittorio.giovara@gmail.com>
+ *
+ * This file is part of Libav.
+ *
+ * Libav 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.
+ *
+ * Libav 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 Libav; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#ifndef AVCODEC_HAP_H
+#define AVCODEC_HAP_H
+
+#include <stdint.h>
+
+#include "libavutil/opt.h"
+
+#include "bytestream.h"
+#include "texturedsp.h"
+
+typedef struct HapContext {
+    AVClass *class;
+
+    TextureDSPContext dxtc;
+    GetByteContext gbc;
+    PutByteContext pbc;
+
+    int section_type;        /* Header type */
+
+    int tex_rat;             /* Compression ratio */
+    const uint8_t *tex_data; /* Compressed texture */
+    uint8_t *tex_buf;        /* Uncompressed texture */
+    size_t tex_size;         /* Size of the compressed texture */
+
+    uint8_t *snappied;       /* Buffer interacting with snappy */
+    size_t max_snappy;       /* Maximum compressed size for snappy buffer */
+
+    /* Pointer to the selected compress or decompress function */
+    int (*tex_fun)(uint8_t *dst, ptrdiff_t stride, const uint8_t *block);
+} HapContext;
+
+enum {
+    HAP_FMT_RGBDXT1   = 0x0B,
+    HAP_FMT_RGBADXT5  = 0x0E,
+    HAP_FMT_YCOCGDXT5 = 0x0F,
+};
+
+enum {
+    HAP_COMP_NONE    = 0xA0,
+    HAP_COMP_SNAPPY  = 0xB0,
+    HAP_COMP_COMPLEX = 0xC0,
+};
+
+#endif /* AVCODEC_HAP_H */