545 files changed, 230976 insertions, 0 deletions

diff --git a/audio_codec/libflac/golomb.h b/audio_codec/libflac/golomb.h
new file mode 100644
index 0000000..248bfc2
--- a/dev/null
+++ b/audio_codec/libflac/golomb.h
@@ -0,0 +1,585 @@
+/*
+ * exp golomb vlc stuff
+ * Copyright (c) 2003 Michael Niedermayer <michaelni@gmx.at>
+ * Copyright (c) 2004 Alex Beregszaszi
+ *
+ * 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 libavcodec/golomb.h
+ * @brief
+ *     exp golomb vlc stuff
+ * @author Michael Niedermayer <michaelni@gmx.at> and Alex Beregszaszi
+ */
+
+#ifndef AVCODEC_GOLOMB_H
+#define AVCODEC_GOLOMB_H
+
+#ifndef __MW__
+#include <stdint.h>
+#endif
+#include "get_bits.h"
+//#include "put_bits.h"
+
+#include <assert.h>
+
+#define INVALID_VLC           0x80000000
+#ifndef __MW__
+extern const uint8_t ff_golomb_vlc_len[512];
+extern const uint8_t ff_ue_golomb_vlc_code[512];
+extern const  int8_t ff_se_golomb_vlc_code[512];
+extern const uint8_t ff_ue_golomb_len[256];
+
+extern const uint8_t ff_interleaved_golomb_vlc_len[256];
+extern const uint8_t ff_interleaved_ue_golomb_vlc_code[256];
+extern const  int8_t ff_interleaved_se_golomb_vlc_code[256];
+extern const uint8_t ff_interleaved_dirac_golomb_vlc_code[256];
+
+
+/**
+* read unsigned exp golomb code.
+*/
+static inline int get_ue_golomb(GetBitContext *gb)
+{
+    unsigned int buf;
+    int log;
+
+    OPEN_READER(re, gb);
+    UPDATE_CACHE(re, gb);
+    buf = GET_CACHE(re, gb);
+
+    if (buf >= (1 << 27)) {
+        buf >>= 32 - 9;
+        LAST_SKIP_BITS(re, gb, ff_golomb_vlc_len[buf]);
+        CLOSE_READER(re, gb);
+
+        return ff_ue_golomb_vlc_code[buf];
+    } else {
+        log = 2 * av_log2(buf) - 31;
+        buf >>= log;
+        buf--;
+        LAST_SKIP_BITS(re, gb, 32 - log);
+        CLOSE_READER(re, gb);
+
+        return buf;
+    }
+}
+
+/**
+* read unsigned exp golomb code, constraint to a max of 31.
+* the return value is undefined if the stored value exceeds 31.
+*/
+static inline int get_ue_golomb_31(GetBitContext *gb)
+{
+    unsigned int buf;
+
+    OPEN_READER(re, gb);
+    UPDATE_CACHE(re, gb);
+    buf = GET_CACHE(re, gb);
+
+    buf >>= 32 - 9;
+    LAST_SKIP_BITS(re, gb, ff_golomb_vlc_len[buf]);
+    CLOSE_READER(re, gb);
+
+    return ff_ue_golomb_vlc_code[buf];
+}
+
+static inline int svq3_get_ue_golomb(GetBitContext *gb)
+{
+    uint32_t buf;
+
+    OPEN_READER(re, gb);
+    UPDATE_CACHE(re, gb);
+    buf = GET_CACHE(re, gb);
+
+    if (buf & 0xAA800000) {
+        buf >>= 32 - 8;
+        LAST_SKIP_BITS(re, gb, ff_interleaved_golomb_vlc_len[buf]);
+        CLOSE_READER(re, gb);
+
+        return ff_interleaved_ue_golomb_vlc_code[buf];
+    } else {
+        int ret = 1;
+
+        while (1) {
+            buf >>= 32 - 8;
+            LAST_SKIP_BITS(re, gb, FFMIN(ff_interleaved_golomb_vlc_len[buf], 8));
+
+            if (ff_interleaved_golomb_vlc_len[buf] != 9) {
+                ret <<= (ff_interleaved_golomb_vlc_len[buf] - 1) >> 1;
+                ret |= ff_interleaved_dirac_golomb_vlc_code[buf];
+                break;
+            }
+            ret = (ret << 4) | ff_interleaved_dirac_golomb_vlc_code[buf];
+            UPDATE_CACHE(re, gb);
+            buf = GET_CACHE(re, gb);
+        }
+
+        CLOSE_READER(re, gb);
+        return ret - 1;
+    }
+}
+
+/**
+ * read unsigned truncated exp golomb code.
+ */
+static inline int get_te0_golomb(GetBitContext *gb, int range)
+{
+    assert(range >= 1);
+
+    if (range == 1) {
+        return 0;
+    } else if (range == 2) {
+        return get_bits1(gb) ^ 1;
+    } else {
+        return get_ue_golomb(gb);
+    }
+}
+
+/**
+ * read unsigned truncated exp golomb code.
+ */
+static inline int get_te_golomb(GetBitContext *gb, int range)
+{
+    assert(range >= 1);
+
+    if (range == 2) {
+        return get_bits1(gb) ^ 1;
+    } else {
+        return get_ue_golomb(gb);
+    }
+}
+
+
+/**
+ * read signed exp golomb code.
+ */
+static inline int get_se_golomb(GetBitContext *gb)
+{
+    unsigned int buf;
+    int log;
+
+    OPEN_READER(re, gb);
+    UPDATE_CACHE(re, gb);
+    buf = GET_CACHE(re, gb);
+
+    if (buf >= (1 << 27)) {
+        buf >>= 32 - 9;
+        LAST_SKIP_BITS(re, gb, ff_golomb_vlc_len[buf]);
+        CLOSE_READER(re, gb);
+
+        return ff_se_golomb_vlc_code[buf];
+    } else {
+        log = 2 * av_log2(buf) - 31;
+        buf >>= log;
+
+        LAST_SKIP_BITS(re, gb, 32 - log);
+        CLOSE_READER(re, gb);
+
+        if (buf & 1) {
+            buf = -(buf >> 1);
+        } else {
+            buf = (buf >> 1);
+        }
+
+        return buf;
+    }
+}
+
+static inline int svq3_get_se_golomb(GetBitContext *gb)
+{
+    unsigned int buf;
+    int log;
+
+    OPEN_READER(re, gb);
+    UPDATE_CACHE(re, gb);
+    buf = GET_CACHE(re, gb);
+
+    if (buf & 0xAA800000) {
+        buf >>= 32 - 8;
+        LAST_SKIP_BITS(re, gb, ff_interleaved_golomb_vlc_len[buf]);
+        CLOSE_READER(re, gb);
+
+        return ff_interleaved_se_golomb_vlc_code[buf];
+    } else {
+        LAST_SKIP_BITS(re, gb, 8);
+        UPDATE_CACHE(re, gb);
+        buf |= 1 | (GET_CACHE(re, gb) >> 8);
+
+        if ((buf & 0xAAAAAAAA) == 0) {
+            return INVALID_VLC;
+        }
+
+        for (log = 31; (buf & 0x80000000) == 0; log--) {
+            buf = (buf << 2) - ((buf << log) >> (log - 1)) + (buf >> 30);
+        }
+
+        LAST_SKIP_BITS(re, gb, 63 - 2 * log - 8);
+        CLOSE_READER(re, gb);
+
+        return (signed)(((((buf << log) >> log) - 1) ^ -(buf & 0x1)) + 1) >> 1;
+    }
+}
+
+static inline int dirac_get_se_golomb(GetBitContext *gb)
+{
+    uint32_t buf;
+    uint32_t ret;
+
+    ret = svq3_get_ue_golomb(gb);
+
+    if (ret) {
+        OPEN_READER(re, gb);
+        UPDATE_CACHE(re, gb);
+        buf = SHOW_SBITS(re, gb, 1);
+        LAST_SKIP_BITS(re, gb, 1);
+        ret = (ret ^ buf) - buf;
+        CLOSE_READER(re, gb);
+    }
+
+    return ret;
+}
+#endif
+
+/**
+ * read unsigned golomb rice code (ffv1).
+ */
+static inline int get_ur_golomb(GetBitContext *gb, int k, int limit, int esc_len)
+{
+    unsigned int buf;
+    int log;
+
+    OPEN_READER(re, gb);
+    UPDATE_CACHE(re, gb);
+    buf = GET_CACHE(re, gb);
+
+    log = av_log2(buf);
+
+    if (log > 31 - limit) {
+        buf >>= log - k;
+        buf += (30 - log) << k;
+        LAST_SKIP_BITS(re, gb, 32 + k - log);
+        CLOSE_READER(re, gb);
+
+        return buf;
+    } else {
+        LAST_SKIP_BITS(re, gb, limit);
+        UPDATE_CACHE(re, gb);
+
+        buf = SHOW_UBITS(re, gb, esc_len);
+
+        LAST_SKIP_BITS(re, gb, esc_len);
+        CLOSE_READER(re, gb);
+
+        return buf + limit - 1;
+    }
+}
+
+/**
+ * read unsigned golomb rice code (jpegls).
+ */
+static inline int get_ur_golomb_jpegls(GetBitContext *gb, int k, int limit, int esc_len)
+{
+    unsigned int buf;
+    int log;
+
+    OPEN_READER(re, gb);
+    UPDATE_CACHE(re, gb);
+    buf = GET_CACHE(re, gb);
+
+    log = av_log2(buf);
+
+    if (log - k >= 32 - MIN_CACHE_BITS + (MIN_CACHE_BITS == 32) && 32 - log < limit) {
+        buf >>= log - k;
+        buf += (30 - log) << k;
+        LAST_SKIP_BITS(re, gb, 32 + k - log);
+        CLOSE_READER(re, gb);
+
+        return buf;
+    } else {
+        int i;
+        for (i = 0; SHOW_UBITS(re, gb, 1) == 0; i++) {
+            LAST_SKIP_BITS(re, gb, 1);
+            UPDATE_CACHE(re, gb);
+        }
+        SKIP_BITS(re, gb, 1);
+
+        if (i < limit - 1) {
+            if (k) {
+                buf = SHOW_UBITS(re, gb, k);
+                LAST_SKIP_BITS(re, gb, k);
+            } else {
+                buf = 0;
+            }
+
+            CLOSE_READER(re, gb);
+            return buf + (i << k);
+        } else if (i == limit - 1) {
+            buf = SHOW_UBITS(re, gb, esc_len);
+            LAST_SKIP_BITS(re, gb, esc_len);
+            CLOSE_READER(re, gb);
+
+            return buf + 1;
+        } else {
+            return -1;
+        }
+    }
+}
+
+/**
+ * read signed golomb rice code (ffv1).
+ */
+static inline int get_sr_golomb(GetBitContext *gb, int k, int limit, int esc_len)
+{
+    int v = get_ur_golomb(gb, k, limit, esc_len);
+
+    v++;
+    if (v & 1) {
+        return v >> 1;
+    } else {
+        return -(v >> 1);
+    }
+
+    //    return (v>>1) ^ -(v&1);
+}
+
+/**
+ * read signed golomb rice code (flac).
+ */
+static inline int get_sr_golomb_flac(GetBitContext *gb, int k, int limit, int esc_len)
+{
+    int v = get_ur_golomb_jpegls(gb, k, limit, esc_len);
+    return (v >> 1) ^ -(v & 1);
+}
+
+/**
+ * read unsigned golomb rice code (shorten).
+ */
+static inline unsigned int get_ur_golomb_shorten(GetBitContext *gb, int k)
+{
+    return get_ur_golomb_jpegls(gb, k, INT_MAX, 0);
+}
+
+/**
+ * read signed golomb rice code (shorten).
+ */
+static inline int get_sr_golomb_shorten(GetBitContext* gb, int k)
+{
+    int uvar = get_ur_golomb_jpegls(gb, k + 1, INT_MAX, 0);
+    if (uvar & 1) {
+        return ~(uvar >> 1);
+    } else {
+        return uvar >> 1;
+    }
+}
+
+
+
+#ifdef TRACE
+
+static inline int get_ue(GetBitContext *s, char *file, const char *func, int line)
+{
+    int show = show_bits(s, 24);
+    int pos = get_bits_count(s);
+    int i = get_ue_golomb(s);
+    int len = get_bits_count(s) - pos;
+    int bits = show >> (24 - len);
+
+    print_bin(bits, len);
+
+    av_log(NULL, AV_LOG_DEBUG, "%5d %2d %3d ue  @%5d in %s %s:%d\n", bits, len, i, pos, file, func, line);
+
+    return i;
+}
+
+static inline int get_se(GetBitContext *s, char *file, const char *func, int line)
+{
+    int show = show_bits(s, 24);
+    int pos = get_bits_count(s);
+    int i = get_se_golomb(s);
+    int len = get_bits_count(s) - pos;
+    int bits = show >> (24 - len);
+
+    print_bin(bits, len);
+
+    av_log(NULL, AV_LOG_DEBUG, "%5d %2d %3d se  @%5d in %s %s:%d\n", bits, len, i, pos, file, func, line);
+
+    return i;
+}
+
+static inline int get_te(GetBitContext *s, int r, char *file, const char *func, int line)
+{
+    int show = show_bits(s, 24);
+    int pos = get_bits_count(s);
+    int i = get_te0_golomb(s, r);
+    int len = get_bits_count(s) - pos;
+    int bits = show >> (24 - len);
+
+    print_bin(bits, len);
+
+    av_log(NULL, AV_LOG_DEBUG, "%5d %2d %3d te  @%5d in %s %s:%d\n", bits, len, i, pos, file, func, line);
+
+    return i;
+}
+
+#define get_ue_golomb(a) get_ue(a, __FILE__, __PRETTY_FUNCTION__, __LINE__)
+#define get_se_golomb(a) get_se(a, __FILE__, __PRETTY_FUNCTION__, __LINE__)
+#define get_te_golomb(a, r) get_te(a, r, __FILE__, __PRETTY_FUNCTION__, __LINE__)
+#define get_te0_golomb(a, r) get_te(a, r, __FILE__, __PRETTY_FUNCTION__, __LINE__)
+
+#endif
+
+#if 0
+/**
+ * write unsigned exp golomb code.
+ */
+static inline void set_ue_golomb(PutBitContext *pb, int i)
+{
+    int e;
+
+    assert(i >= 0);
+
+#if 0
+    if (i = 0) {
+        put_bits(pb, 1, 1);
+        return;
+    }
+#endif
+    if (i < 256) {
+        put_bits(pb, ff_ue_golomb_len[i], i + 1);
+    } else {
+        e = av_log2(i + 1);
+
+        put_bits(pb, 2 * e + 1, i + 1);
+    }
+}
+
+/**
+ * write truncated unsigned exp golomb code.
+ */
+static inline void set_te_golomb(PutBitContext *pb, int i, int range)
+{
+    assert(range >= 1);
+    assert(i <= range);
+
+    if (range == 2) {
+        put_bits(pb, 1, i ^ 1);
+    } else {
+        set_ue_golomb(pb, i);
+    }
+}
+
+/**
+ * write signed exp golomb code. 16 bits at most.
+ */
+static inline void set_se_golomb(PutBitContext *pb, int i)
+{
+    //    if (i>32767 || i<-32767)
+    //        av_log(NULL,AV_LOG_ERROR,"value out of range %d\n", i);
+#if 0
+    if (i <= 0) {
+        i = -2 * i;
+    } else {
+        i =  2 * i - 1;
+    }
+#elif 1
+    i = 2 * i - 1;
+    if (i < 0) {
+        i ^= -1;    //FIXME check if gcc does the right thing
+    }
+#else
+    i = 2 * i - 1;
+    i ^= (i >> 31);
+#endif
+    set_ue_golomb(pb, i);
+}
+
+/**
+ * write unsigned golomb rice code (ffv1).
+ */
+static inline void set_ur_golomb(PutBitContext *pb, int i, int k, int limit, int esc_len)
+{
+    int e;
+
+    assert(i >= 0);
+
+    e = i >> k;
+    if (e < limit) {
+        put_bits(pb, e + k + 1, (1 << k) + (i & ((1 << k) - 1)));
+    } else {
+        put_bits(pb, limit + esc_len, i - limit + 1);
+    }
+}
+
+/**
+ * write unsigned golomb rice code (jpegls).
+ */
+static inline void set_ur_golomb_jpegls(PutBitContext *pb, int i, int k, int limit, int esc_len)
+{
+    int e;
+
+    assert(i >= 0);
+
+    e = (i >> k) + 1;
+    if (e < limit) {
+        while (e > 31) {
+            put_bits(pb, 31, 0);
+            e -= 31;
+        }
+        put_bits(pb, e, 1);
+        if (k) {
+            put_sbits(pb, k, i);
+        }
+    } else {
+        while (limit > 31) {
+            put_bits(pb, 31, 0);
+            limit -= 31;
+        }
+        put_bits(pb, limit  , 1);
+        put_bits(pb, esc_len, i - 1);
+    }
+}
+
+/**
+ * write signed golomb rice code (ffv1).
+ */
+static inline void set_sr_golomb(PutBitContext *pb, int i, int k, int limit, int esc_len)
+{
+    int v;
+
+    v = -2 * i - 1;
+    v ^= (v >> 31);
+
+    set_ur_golomb(pb, v, k, limit, esc_len);
+}
+
+/**
+ * write signed golomb rice code (flac).
+ */
+static inline void set_sr_golomb_flac(PutBitContext *pb, int i, int k, int limit, int esc_len)
+{
+    int v;
+
+    v = -2 * i - 1;
+    v ^= (v >> 31);
+
+    set_ur_golomb_jpegls(pb, v, k, limit, esc_len);
+}
+#endif
+
+#endif /* AVCODEC_GOLOMB_H */