1 files changed, 91 insertions, 0 deletions
diff --git a/ffmpeg/libavcodec/proresdsp.c b/ffmpeg/libavcodec/proresdsp.c
new file mode 100644
index 0000000..d73de46
--- /dev/null
+++ b/ffmpeg/libavcodec/proresdsp.c
@@ -0,0 +1,91 @@
+/*
+ * Apple ProRes compatible decoder
+ *
+ * Copyright (c) 2010-2011 Maxim Poliakovski
+ *
+ * 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
+ */
+
+#include "dct.h"
+#include "dsputil.h"
+#include "proresdsp.h"
+#include "simple_idct.h"
+#include "libavutil/common.h"
+
+#define BIAS     (1 << (PRORES_BITS_PER_SAMPLE - 1))           ///< bias value for converting signed pixels into unsigned ones
+#define CLIP_MIN (1 << (PRORES_BITS_PER_SAMPLE - 8))           ///< minimum value for clipping resulting pixels
+#define CLIP_MAX (1 << PRORES_BITS_PER_SAMPLE) - CLIP_MIN - 1  ///< maximum value for clipping resulting pixels
+
+#define CLIP_AND_BIAS(x) (av_clip((x) + BIAS, CLIP_MIN, CLIP_MAX))
+
+#if CONFIG_PRORES_DECODER | CONFIG_PRORES_LGPL_DECODER
+/**
+ * Add bias value, clamp and output pixels of a slice
+ */
+static void put_pixels(uint16_t *dst, int stride, const int16_t *in)
+{
+    int x, y, src_offset, dst_offset;
+
+    for (y = 0, dst_offset = 0; y < 8; y++, dst_offset += stride) {
+        for (x = 0; x < 8; x++) {
+            src_offset = (y << 3) + x;
+
+            dst[dst_offset + x] = CLIP_AND_BIAS(in[src_offset]);
+        }
+    }
+}
+
+static void prores_idct_put_c(uint16_t *out, int linesize, int16_t *block, const int16_t *qmat)
+{
+    ff_prores_idct(block, qmat);
+    put_pixels(out, linesize >> 1, block);
+}
+#endif
+
+#if CONFIG_PRORES_KOSTYA_ENCODER
+static void prores_fdct_c(const uint16_t *src, int linesize, int16_t *block)
+{
+    int x, y;
+    const uint16_t *tsrc = src;
+
+    for (y = 0; y < 8; y++) {
+        for (x = 0; x < 8; x++)
+            block[y * 8 + x] = tsrc[x];
+        tsrc += linesize >> 1;
+    }
+    ff_jpeg_fdct_islow_10(block);
+}
+#endif
+
+void ff_proresdsp_init(ProresDSPContext *dsp, AVCodecContext *avctx)
+{
+#if CONFIG_PRORES_DECODER | CONFIG_PRORES_LGPL_DECODER
+    dsp->idct_put = prores_idct_put_c;
+    dsp->idct_permutation_type = FF_NO_IDCT_PERM;
+
+    if (ARCH_X86) ff_proresdsp_x86_init(dsp, avctx);
+
+    ff_init_scantable_permutation(dsp->idct_permutation,
+                                  dsp->idct_permutation_type);
+#endif
+#if CONFIG_PRORES_KOSTYA_ENCODER
+    dsp->fdct                 = prores_fdct_c;
+    dsp->dct_permutation_type = FF_NO_IDCT_PERM;
+    ff_init_scantable_permutation(dsp->dct_permutation,
+                                  dsp->dct_permutation_type);
+#endif
+}