virtualenv/FFmpeg
1
0
Fork 0
mirror of https://github.com/FFmpeg/FFmpeg.git synced 2025-01-29 22:00:58 +02:00
Code Issues Releases Activity

Merge commit '69ab9f53f901eac6a649e22d28cf093357870627'

Browse Source 
* 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>
This commit is contained in:
Michael Niedermayer 2015-07-09 05:04:13 +02:00
commit 07ae8fa20e
4 changed files with 156 additions and 123 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
libavcodec/Makefile
View File

@ -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

123
libavcodec/hevc.c
View File

@ -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;

9
libavcodec/hevc.h
View File

@ -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];

145
libavcodec/hevc_parse.c Normal file
View File

@ -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;
}