Merge pull request #275 from trav90/ffvpx-resync

Resync ffvpx code with 3.4.2-release from upstream

1 files changed, 0 insertions, 205 deletions

diff --git a/media/ffvpx/libavutil/lzo.c b/media/ffvpx/libavutil/lzo.c
deleted file mode 100644
index 1ae076e33..000000000
--- a/media/ffvpx/libavutil/lzo.c
+++ /dev/null
@@ -1,205 +0,0 @@
-/*
- * LZO 1x decompression
- * Copyright (c) 2006 Reimar Doeffinger
- *
- * 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
- */
-
-#include <string.h>
-
-#include "avutil.h"
-#include "avassert.h"
-#include "common.h"
-#include "intreadwrite.h"
-#include "lzo.h"
-
-/// Define if we may write up to 12 bytes beyond the output buffer.
-#define OUTBUF_PADDED 1
-/// Define if we may read up to 8 bytes beyond the input buffer.
-#define INBUF_PADDED 1
-
-typedef struct LZOContext {
-    const uint8_t *in, *in_end;
-    uint8_t *out_start, *out, *out_end;
-    int error;
-} LZOContext;
-
-/**
- * @brief Reads one byte from the input buffer, avoiding an overrun.
- * @return byte read
- */
-static inline int get_byte(LZOContext *c)
-{
-    if (c->in < c->in_end)
-        return *c->in++;
-    c->error |= AV_LZO_INPUT_DEPLETED;
-    return 1;
-}
-
-#ifdef INBUF_PADDED
-#define GETB(c) (*(c).in++)
-#else
-#define GETB(c) get_byte(&(c))
-#endif
-
-/**
- * @brief Decodes a length value in the coding used by lzo.
- * @param x previous byte value
- * @param mask bits used from x
- * @return decoded length value
- */
-static inline int get_len(LZOContext *c, int x, int mask)
-{
-    int cnt = x & mask;
-    if (!cnt) {
-        while (!(x = get_byte(c))) {
-            if (cnt >= INT_MAX - 1000) {
-                c->error |= AV_LZO_ERROR;
-                break;
-            }
-            cnt += 255;
-        }
-        cnt += mask + x;
-    }
-    return cnt;
-}
-
-/**
- * @brief Copies bytes from input to output buffer with checking.
- * @param cnt number of bytes to copy, must be >= 0
- */
-static inline void copy(LZOContext *c, int cnt)
-{
-    register const uint8_t *src = c->in;
-    register uint8_t *dst       = c->out;
-    av_assert0(cnt >= 0);
-    if (cnt > c->in_end - src) {
-        cnt       = FFMAX(c->in_end - src, 0);
-        c->error |= AV_LZO_INPUT_DEPLETED;
-    }
-    if (cnt > c->out_end - dst) {
-        cnt       = FFMAX(c->out_end - dst, 0);
-        c->error |= AV_LZO_OUTPUT_FULL;
-    }
-#if defined(INBUF_PADDED) && defined(OUTBUF_PADDED)
-    AV_COPY32U(dst, src);
-    src += 4;
-    dst += 4;
-    cnt -= 4;
-    if (cnt > 0)
-#endif
-    memcpy(dst, src, cnt);
-    c->in  = src + cnt;
-    c->out = dst + cnt;
-}
-
-/**
- * @brief Copies previously decoded bytes to current position.
- * @param back how many bytes back we start, must be > 0
- * @param cnt number of bytes to copy, must be > 0
- *
- * cnt > back is valid, this will copy the bytes we just copied,
- * thus creating a repeating pattern with a period length of back.
- */
-static inline void copy_backptr(LZOContext *c, int back, int cnt)
-{
-    register uint8_t *dst       = c->out;
-    av_assert0(cnt > 0);
-    if (dst - c->out_start < back) {
-        c->error |= AV_LZO_INVALID_BACKPTR;
-        return;
-    }
-    if (cnt > c->out_end - dst) {
-        cnt       = FFMAX(c->out_end - dst, 0);
-        c->error |= AV_LZO_OUTPUT_FULL;
-    }
-    av_memcpy_backptr(dst, back, cnt);
-    c->out = dst + cnt;
-}
-
-int av_lzo1x_decode(void *out, int *outlen, const void *in, int *inlen)
-{
-    int state = 0;
-    int x;
-    LZOContext c;
-    if (*outlen <= 0 || *inlen <= 0) {
-        int res = 0;
-        if (*outlen <= 0)
-            res |= AV_LZO_OUTPUT_FULL;
-        if (*inlen <= 0)
-            res |= AV_LZO_INPUT_DEPLETED;
-        return res;
-    }
-    c.in      = in;
-    c.in_end  = (const uint8_t *)in + *inlen;
-    c.out     = c.out_start = out;
-    c.out_end = (uint8_t *)out + *outlen;
-    c.error   = 0;
-    x         = GETB(c);
-    if (x > 17) {
-        copy(&c, x - 17);
-        x = GETB(c);
-        if (x < 16)
-            c.error |= AV_LZO_ERROR;
-    }
-    if (c.in > c.in_end)
-        c.error |= AV_LZO_INPUT_DEPLETED;
-    while (!c.error) {
-        int cnt, back;
-        if (x > 15) {
-            if (x > 63) {
-                cnt  = (x >> 5) - 1;
-                back = (GETB(c) << 3) + ((x >> 2) & 7) + 1;
-            } else if (x > 31) {
-                cnt  = get_len(&c, x, 31);
-                x    = GETB(c);
-                back = (GETB(c) << 6) + (x >> 2) + 1;
-            } else {
-                cnt   = get_len(&c, x, 7);
-                back  = (1 << 14) + ((x & 8) << 11);
-                x     = GETB(c);
-                back += (GETB(c) << 6) + (x >> 2);
-                if (back == (1 << 14)) {
-                    if (cnt != 1)
-                        c.error |= AV_LZO_ERROR;
-                    break;
-                }
-            }
-        } else if (!state) {
-            cnt = get_len(&c, x, 15);
-            copy(&c, cnt + 3);
-            x = GETB(c);
-            if (x > 15)
-                continue;
-            cnt  = 1;
-            back = (1 << 11) + (GETB(c) << 2) + (x >> 2) + 1;
-        } else {
-            cnt  = 0;
-            back = (GETB(c) << 2) + (x >> 2) + 1;
-        }
-        copy_backptr(&c, back, cnt + 2);
-        state =
-        cnt   = x & 3;
-        copy(&c, cnt);
-        x = GETB(c);
-    }
-    *inlen = c.in_end - c.in;
-    if (c.in > c.in_end)
-        *inlen = 0;
-    *outlen = c.out_end - c.out;
-    return c.error;
-}