Canopus HQ/HQA decoder

Based on work by Kostya Shishkov <kostya.shishkov@gmail.com>.

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

1 files changed, 60 insertions, 0 deletions

diff --git a/libavcodec/hq_hqa.h b/libavcodec/hq_hqa.h
new file mode 100644
index 0000000000..6bd858ddf2
--- /dev/null
+++ b/libavcodec/hq_hqa.h
@@ -0,0 +1,60 @@
+/*
+ * Canopus HQ/HQA decoder
+ *
+ * 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_HQ_HQA_H
+#define AVCODEC_HQ_HQA_H
+
+#include <stdint.h>
+
+#include "avcodec.h"
+#include "get_bits.h"
+#include "bytestream.h"
+#include "hq_hqadsp.h"
+
+#define NUM_HQ_AC_ENTRIES 746
+#define NUM_HQ_PROFILES   22
+#define NUM_HQ_QUANTS     16
+
+typedef struct HQContext {
+    AVCodecContext *avctx;
+    HQDSPContext hqhqadsp;
+    GetByteContext gbc;
+
+    VLC hq_ac_vlc;
+    VLC hqa_cbp_vlc;
+    DECLARE_ALIGNED(16, int16_t, block)[12][64];
+} HQContext;
+
+typedef struct HQProfile {
+    const uint8_t *perm_tab;
+    int width, height;
+    int num_slices;
+    int tab_w, tab_h;
+} HQProfile;
+
+extern const int32_t * const ff_hq_quants[16][2][4];
+extern const HQProfile ff_hq_profile[NUM_HQ_PROFILES];
+
+extern const uint8_t ff_hq_ac_skips[NUM_HQ_AC_ENTRIES];
+extern const int16_t ff_hq_ac_syms [NUM_HQ_AC_ENTRIES];
+
+int ff_hq_init_vlcs(HQContext *c);
+
+#endif /* AVCODEC_HQ_HQA_H */