Merge commit '69ab9f53f901eac6a649e22d28cf093357870627'

* commit '69ab9f53f901eac6a649e22d28cf093357870627':
  hevc: split bitstream unescaping to a separate file

Conflicts:
	libavcodec/Makefile
	libavcodec/hevc.c

See: afa93d198aaf2cc661c4df6d4095cd030265d30a
Merged-by: Michael Niedermayer <michaelni@gmx.at>

4 files changed, 156 insertions, 123 deletions

diff --git a/libavcodec/Makefile b/libavcodec/Makefile
index db8d818137..a062833ffc 100644
--- a/libavcodec/Makefile
+++ b/libavcodec/Makefile
@@ -285,7 +285,7 @@ OBJS-$(CONFIG_HAP_DECODER)             += hapdec.o
 OBJS-$(CONFIG_HAP_ENCODER)             += hapenc.o
 OBJS-$(CONFIG_HEVC_DECODER)            += hevc.o hevc_mvs.o hevc_ps.o hevc_sei.o \
                                           hevc_cabac.o hevc_refs.o hevcpred.o    \
-                                          hevcdsp.o hevc_filter.o
+                                          hevcdsp.o hevc_filter.o hevc_parse.o
 OBJS-$(CONFIG_HNM4_VIDEO_DECODER)      += hnm4video.o
 OBJS-$(CONFIG_HQ_HQA_DECODER)          += hq_hqa.o hq_hqadata.o hq_hqadsp.o \
                                           canopus.o
diff --git a/libavcodec/hevc.c b/libavcodec/hevc.c
index f7f0552498..38734f017d 100644
--- a/libavcodec/hevc.c
+++ b/libavcodec/hevc.c
@@ -2786,119 +2786,6 @@ fail:
     return 0;
 }
 
-/* FIXME: This is adapted from ff_h264_decode_nal, avoiding duplication
- * between these functions would be nice. */
-int ff_hevc_extract_rbsp(HEVCContext *s, const uint8_t *src, int length,
-                         HEVCNAL *nal)
-{
-    int i, si, di;
-    uint8_t *dst;
-
-    s->skipped_bytes = 0;
-#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 /* HAVE_FAST_64BIT */
-#else
-    for (i = 0; i + 1 < length; i += 2) {
-        if (src[i])
-            continue;
-        if (i > 0 && src[i - 1] == 0)
-            i--;
-        STARTCODE_TEST;
-    }
-#endif /* HAVE_FAST_UNALIGNED */
-
-    if (i >= length - 1) { // no escaped 0
-        nal->data     =
-        nal->raw_data = src;
-        nal->size     =
-        nal->raw_size = length;
-        return length;
-    }
-
-    av_fast_malloc(&nal->rbsp_buffer, &nal->rbsp_buffer_size,
-                   length + FF_INPUT_BUFFER_PADDING_SIZE);
-    if (!nal->rbsp_buffer)
-        return AVERROR(ENOMEM);
-
-    dst = nal->rbsp_buffer;
-
-    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;
-
-                s->skipped_bytes++;
-                if (s->skipped_bytes_pos_size < s->skipped_bytes) {
-                    s->skipped_bytes_pos_size *= 2;
-                    av_reallocp_array(&s->skipped_bytes_pos,
-                            s->skipped_bytes_pos_size,
-                            sizeof(*s->skipped_bytes_pos));
-                    if (!s->skipped_bytes_pos)
-                        return AVERROR(ENOMEM);
-                }
-                if (s->skipped_bytes_pos)
-                    s->skipped_bytes_pos[s->skipped_bytes-1] = di - 1;
-                continue;
-            } else // next start code
-                goto nsc;
-        }
-
-        dst[di++] = src[si++];
-    }
-    while (si < length)
-        dst[di++] = src[si++];
-
-nsc:
-    memset(dst + di, 0, FF_INPUT_BUFFER_PADDING_SIZE);
-
-    nal->data = dst;
-    nal->size = di;
-    nal->raw_data = src;
-    nal->raw_size = si;
-    return si;
-}
-
 static int decode_nal_units(HEVCContext *s, const uint8_t *buf, int length)
 {
     int i, consumed, ret = 0;
@@ -2982,17 +2869,15 @@ static int decode_nal_units(HEVCContext *s, const uint8_t *buf, int length)
         nal = &s->nals[s->nb_nals];
 
         consumed = ff_hevc_extract_rbsp(s, buf, extract_length, nal);
-
-        s->skipped_bytes_nal[s->nb_nals] = s->skipped_bytes;
-        s->skipped_bytes_pos_size_nal[s->nb_nals] = s->skipped_bytes_pos_size;
-        s->skipped_bytes_pos_nal[s->nb_nals++] = s->skipped_bytes_pos;
-
-
         if (consumed < 0) {
             ret = consumed;
             goto fail;
         }
 
+        s->skipped_bytes_nal[s->nb_nals] = s->skipped_bytes;
+        s->skipped_bytes_pos_size_nal[s->nb_nals] = s->skipped_bytes_pos_size;
+        s->skipped_bytes_pos_nal[s->nb_nals++] = s->skipped_bytes_pos;
+
         ret = init_get_bits8(&s->HEVClc->gb, nal->data, nal->size);
         if (ret < 0)
             goto fail;
diff --git a/libavcodec/hevc.h b/libavcodec/hevc.h
index 8ab9f84f6f..bd0c48bf81 100644
--- a/libavcodec/hevc.h
+++ b/libavcodec/hevc.h
@@ -944,9 +944,6 @@ int ff_hevc_decode_nal_sps(HEVCContext *s);
 int ff_hevc_decode_nal_pps(HEVCContext *s);
 int ff_hevc_decode_nal_sei(HEVCContext *s);
 
-int ff_hevc_extract_rbsp(HEVCContext *s, const uint8_t *src, int length,
-                         HEVCNAL *nal);
-
 /**
  * Mark all frames in DPB as unused for reference.
  */
@@ -1051,6 +1048,12 @@ void ff_hevc_hls_residual_coding(HEVCContext *s, int x0, int y0,
 void ff_hevc_hls_mvd_coding(HEVCContext *s, int x0, int y0, int log2_cb_size);
 
 
+/**
+ * Extract the raw (unescaped) HEVC bitstream.
+ */
+int ff_hevc_extract_rbsp(HEVCContext *s, const uint8_t *src, int length,
+                         HEVCNAL *nal);
+
 extern const uint8_t ff_hevc_qpel_extra_before[4];
 extern const uint8_t ff_hevc_qpel_extra_after[4];
 extern const uint8_t ff_hevc_qpel_extra[4];
diff --git a/libavcodec/hevc_parse.c b/libavcodec/hevc_parse.c
new file mode 100644
index 0000000000..260f1e1aa6
--- /dev/null
+++ b/libavcodec/hevc_parse.c
@@ -0,0 +1,145 @@
+/*
+ * HEVC common code
+ *
+ * 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 "config.h"
+
+#include "libavutil/intreadwrite.h"
+#include "libavutil/mem.h"
+
+#include "hevc.h"
+
+/* FIXME: This is adapted from ff_h264_decode_nal, avoiding duplication
+ * between these functions would be nice. */
+int ff_hevc_extract_rbsp(HEVCContext *s, const uint8_t *src, int length,
+                         HEVCNAL *nal)
+{
+    int i, si, di;
+    uint8_t *dst;
+
+    if (s)
+        s->skipped_bytes = 0;
+#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 /* HAVE_FAST_64BIT */
+#else
+    for (i = 0; i + 1 < length; i += 2) {
+        if (src[i])
+            continue;
+        if (i > 0 && src[i - 1] == 0)
+            i--;
+        STARTCODE_TEST;
+    }
+#endif /* HAVE_FAST_UNALIGNED */
+
+    if (i >= length - 1) { // no escaped 0
+        nal->data     =
+        nal->raw_data = src;
+        nal->size     =
+        nal->raw_size = length;
+        return length;
+    }
+
+    av_fast_malloc(&nal->rbsp_buffer, &nal->rbsp_buffer_size,
+                   length + FF_INPUT_BUFFER_PADDING_SIZE);
+    if (!nal->rbsp_buffer)
+        return AVERROR(ENOMEM);
+
+    dst = nal->rbsp_buffer;
+
+    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;
+
+                if (s) {
+                        s->skipped_bytes++;
+                        if (s->skipped_bytes_pos_size < s->skipped_bytes) {
+                        s->skipped_bytes_pos_size *= 2;
+                        av_reallocp_array(&s->skipped_bytes_pos,
+                                s->skipped_bytes_pos_size,
+                                sizeof(*s->skipped_bytes_pos));
+                        if (!s->skipped_bytes_pos)
+                                return AVERROR(ENOMEM);
+                        }
+                        if (s->skipped_bytes_pos)
+                        s->skipped_bytes_pos[s->skipped_bytes-1] = di - 1;
+                }
+                continue;
+            } else // next start code
+                goto nsc;
+        }
+
+        dst[di++] = src[si++];
+    }
+    while (si < length)
+        dst[di++] = src[si++];
+
+nsc:
+    memset(dst + di, 0, FF_INPUT_BUFFER_PADDING_SIZE);
+
+    nal->data = dst;
+    nal->size = di;
+    nal->raw_data = src;
+    nal->raw_size = si;
+    return si;
+}
+