ffmpeg-2.1.1: move directory

git-svn-id: svn://kolibrios.org@6148 a494cfbc-eb01-0410-851d-a64ba20cac60
2016-02-05 22:14:10 +00:00
parent a4b787f4b8
commit ecf3e862ea
4011 changed files with 1868 additions and 4 deletions
--- a/contrib/sdk/sources/ffmpeg/ffmpeg-2.1/libavcodec/jpegls.h
+++ b/contrib/sdk/sources/ffmpeg/ffmpeg-2.1/libavcodec/jpegls.h
@@ -0,0 +1,126 @@
+/*
+ * JPEG-LS common code
+ * Copyright (c) 2003 Michael Niedermayer
+ * Copyright (c) 2006 Konstantin Shishkov
+ *
+ * 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
+ */
+
+/**
+ * @file
+ * JPEG-LS common code.
+ */
+
+#ifndef AVCODEC_JPEGLS_H
+#define AVCODEC_JPEGLS_H
+
+#include "libavutil/common.h"
+#include "avcodec.h"
+
+typedef struct JpeglsContext {
+    AVCodecContext *avctx;
+    AVFrame picture;
+} JpeglsContext;
+
+typedef struct JLSState {
+    int T1, T2, T3;
+    int A[367], B[367], C[365], N[367];
+    int limit, reset, bpp, qbpp, maxval, range;
+    int near, twonear;
+    int run_index[4];
+} JLSState;
+
+extern const uint8_t ff_log2_run[32];
+
+/**
+ * Calculate initial JPEG-LS parameters
+ */
+void ff_jpegls_init_state(JLSState *state);
+
+/**
+ * Calculate quantized gradient value, used for context determination
+ */
+static inline int ff_jpegls_quantize(JLSState *s, int v)
+{
+    if (v == 0)
+        return 0;
+    if (v < 0) {
+        if (v <= -s->T3)
+            return -4;
+        if (v <= -s->T2)
+            return -3;
+        if (v <= -s->T1)
+            return -2;
+        if (v < -s->near)
+            return -1;
+        return 0;
+    } else {
+        if (v <= s->near)
+            return 0;
+        if (v < s->T1)
+            return 1;
+        if (v < s->T2)
+            return 2;
+        if (v < s->T3)
+            return 3;
+        return 4;
+    }
+}
+
+/**
+ * Calculate JPEG-LS codec values
+ */
+void ff_jpegls_reset_coding_parameters(JLSState *s, int reset_all);
+
+static inline void ff_jpegls_downscale_state(JLSState *state, int Q)
+{
+    if (state->N[Q] == state->reset) {
+        state->A[Q] >>= 1;
+        state->B[Q] >>= 1;
+        state->N[Q] >>= 1;
+    }
+    state->N[Q]++;
+}
+
+static inline int ff_jpegls_update_state_regular(JLSState *state,
+                                                 int Q, int err)
+{
+    if(FFABS(err) > 0xFFFF)
+        return -0x10000;
+    state->A[Q] += FFABS(err);
+    err         *= state->twonear;
+    state->B[Q] += err;
+
+    ff_jpegls_downscale_state(state, Q);
+
+    if (state->B[Q] <= -state->N[Q]) {
+        state->B[Q] = FFMAX(state->B[Q] + state->N[Q], 1 - state->N[Q]);
+        if (state->C[Q] > -128)
+            state->C[Q]--;
+    } else if (state->B[Q] > 0) {
+        state->B[Q] = FFMIN(state->B[Q] - state->N[Q], 0);
+        if (state->C[Q] < 127)
+            state->C[Q]++;
+    }
+
+    return err;
+}
+
+#define R(a, i)    (bits == 8 ?  ((uint8_t *)(a))[i]      :  ((uint16_t *)(a))[i])
+#define W(a, i, v) (bits == 8 ? (((uint8_t *)(a))[i] = v) : (((uint16_t *)(a))[i] = v))
+
+#endif /* AVCODEC_JPEGLS_H */