From 8d0cc8ca97678f4ca87948ebabcbaab5a4f4c1f6 Mon Sep 17 00:00:00 2001
From: Anton Khirnov <anton@khirnov.net>
Date: Mon, 21 Mar 2016 15:38:31 +0100
Subject: h264_parser: switch to h2645_parse for NAL unescaping

Remove now unused ff_h264_decode_nal().
---
 libavcodec/h264.c | 106 ------------------------------------------------------
 1 file changed, 106 deletions(-)

(limited to 'libavcodec/h264.c')

diff --git a/libavcodec/h264.c b/libavcodec/h264.c
index acda35b94f..da7f88f66c 100644
--- a/libavcodec/h264.c
+++ b/libavcodec/h264.c
@@ -116,112 +116,6 @@ void ff_h264_draw_horiz_band(const H264Context *h, H264SliceContext *sl,
     }
 }
 
-const uint8_t *ff_h264_decode_nal(H264Context *h, H264SliceContext *sl,
-                                  const uint8_t *src,
-                                  int *dst_length, int *consumed, int length)
-{
-    int i, si, di;
-    uint8_t *dst;
-
-    // src[0]&0x80; // forbidden bit
-    h->nal_ref_idc   = src[0] >> 5;
-    h->nal_unit_type = src[0] & 0x1F;
-
-    src++;
-    length--;
-
-#define STARTCODE_TEST                                                  \
-    if (i + 2 < length && src[i + 1] == 0 && src[i + 2] <= 3) {         \
-        if (src[i + 2] != 3) {                                          \
-            /* startcode, so we must be past the end */                 \
-            length = i;                                                 \
-        }                                                               \
-        break;                                                          \
-    }
-
-#if HAVE_FAST_UNALIGNED
-#define FIND_FIRST_ZERO                                                 \
-    if (i > 0 && !src[i])                                               \
-        i--;                                                            \
-    while (src[i])                                                      \
-        i++
-
-#if HAVE_FAST_64BIT
-    for (i = 0; i + 1 < length; i += 9) {
-        if (!((~AV_RN64A(src + i) &
-               (AV_RN64A(src + i) - 0x0100010001000101ULL)) &
-              0x8000800080008080ULL))
-            continue;
-        FIND_FIRST_ZERO;
-        STARTCODE_TEST;
-        i -= 7;
-    }
-#else
-    for (i = 0; i + 1 < length; i += 5) {
-        if (!((~AV_RN32A(src + i) &
-               (AV_RN32A(src + i) - 0x01000101U)) &
-              0x80008080U))
-            continue;
-        FIND_FIRST_ZERO;
-        STARTCODE_TEST;
-        i -= 3;
-    }
-#endif
-#else
-    for (i = 0; i + 1 < length; i += 2) {
-        if (src[i])
-            continue;
-        if (i > 0 && src[i - 1] == 0)
-            i--;
-        STARTCODE_TEST;
-    }
-#endif
-
-    if (i >= length - 1) { // no escaped 0
-        *dst_length = length;
-        *consumed   = length + 1; // +1 for the header
-        return src;
-    }
-
-    av_fast_malloc(&sl->rbsp_buffer, &sl->rbsp_buffer_size,
-                   length + AV_INPUT_BUFFER_PADDING_SIZE);
-    dst = sl->rbsp_buffer;
-
-    if (!dst)
-        return NULL;
-
-    memcpy(dst, src, i);
-    si = di = i;
-    while (si + 2 < length) {
-        // remove escapes (very rare 1:2^22)
-        if (src[si + 2] > 3) {
-            dst[di++] = src[si++];
-            dst[di++] = src[si++];
-        } else if (src[si] == 0 && src[si + 1] == 0) {
-            if (src[si + 2] == 3) { // escape
-                dst[di++]  = 0;
-                dst[di++]  = 0;
-                si        += 3;
-                continue;
-            } else // next start code
-                goto nsc;
-        }
-
-        dst[di++] = src[si++];
-    }
-    while (si < length)
-        dst[di++] = src[si++];
-
-nsc:
-    memset(dst + di, 0, AV_INPUT_BUFFER_PADDING_SIZE);
-
-    *dst_length = di;
-    *consumed   = si + 1; // +1 for the header
-    /* FIXME store exact number of bits in the getbitcontext
-     * (it is needed for decoding) */
-    return dst;
-}
-
 void ff_h264_free_tables(H264Context *h)
 {
     int i;
-- 
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