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ffmpeg
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h264: Move search code search functions into separate source files. 

This permits re-use with parsers for codecs which use similar start codes.

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
This commit is contained in:
Ben Avison 2014-04-16 01:51:31 +01:00 committed by Michael Niedermayer
parent e148a5820d
commit 270cede3f3
7 changed files with 100 additions and 35 deletions
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2
libavcodec/Makefile
View File

@ -50,7 +50,7 @@ OBJS-$(CONFIG_FFT) += avfft.o fft_fixed.o fft_float.o \
OBJS-$(CONFIG_GOLOMB) += golomb.o
OBJS-$(CONFIG_H263DSP) += h263dsp.o
OBJS-$(CONFIG_H264CHROMA) += h264chroma.o
OBJS-$(CONFIG_H264DSP) += h264dsp.o h264idct.o
OBJS-$(CONFIG_H264DSP) += h264dsp.o h264idct.o startcode.o
OBJS-$(CONFIG_H264PRED) += h264pred.o
OBJS-$(CONFIG_H264QPEL) += h264qpel.o
OBJS-$(CONFIG_HPELDSP) += hpeldsp.o

2
libavcodec/arm/Makefile
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@ -51,7 +51,7 @@ ARMV6-OBJS-$(CONFIG_AC3DSP) += arm/ac3dsp_armv6.o
ARMV6-OBJS-$(CONFIG_DSPUTIL) += arm/dsputil_init_armv6.o \
arm/dsputil_armv6.o \
arm/simple_idct_armv6.o
ARMV6-OBJS-$(CONFIG_H264DSP) += arm/h264dsp_armv6.o
ARMV6-OBJS-$(CONFIG_H264DSP) += arm/startcode_armv6.o
ARMV6-OBJS-$(CONFIG_HPELDSP) += arm/hpeldsp_init_armv6.o \
arm/hpeldsp_armv6.o
ARMV6-OBJS-$(CONFIG_MPEGAUDIODSP) += arm/mpegaudiodsp_fixed_armv6.o

4
libavcodec/arm/h264dsp_init_arm.c
View File

@ -24,7 +24,7 @@
#include "libavutil/arm/cpu.h"
#include "libavcodec/h264dsp.h"
int ff_h264_find_start_code_candidate_armv6(const uint8_t *buf, int size);
int ff_startcode_find_candidate_armv6(const uint8_t *buf, int size);
void ff_h264_v_loop_filter_luma_neon(uint8_t *pix, int stride, int alpha,
int beta, int8_t *tc0);
@ -109,7 +109,7 @@ av_cold void ff_h264dsp_init_arm(H264DSPContext *c, const int bit_depth,
int cpu_flags = av_get_cpu_flags();
if (have_armv6(cpu_flags))
c->h264_find_start_code_candidate = ff_h264_find_start_code_candidate_armv6;
c->h264_find_start_code_candidate = ff_startcode_find_candidate_armv6;
if (have_neon(cpu_flags))
h264dsp_init_neon(c, bit_depth, chroma_format_idc);
}

4
libavcodec/arm/h264dsp_armv6.S → libavcodec/arm/startcode_armv6.S
View File

@ -69,8 +69,8 @@ TMP3 .req lr
andseq TMP3, TMP3, PATTERN
.endm
/* int ff_h264_find_start_code_candidate_armv6(const uint8_t *buf, int size) */
function ff_h264_find_start_code_candidate_armv6, export=1
/* int ff_startcode_find_candidate_armv6(const uint8_t *buf, int size) */
function ff_startcode_find_candidate_armv6, export=1
push {v1-v6,lr}
mov PTR, BUF
@ Ensure there are at least (PRELOAD_DISTANCE+2) complete cachelines to go

31
libavcodec/h264dsp.c
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@ -33,6 +33,7 @@
#include "avcodec.h"
#include "h264dsp.h"
#include "h264idct.h"
#include "startcode.h"
#include "libavutil/common.h"
#define BIT_DEPTH 8
@ -63,34 +64,6 @@
#include "h264addpx_template.c"
#undef BIT_DEPTH
static int h264_find_start_code_candidate_c(const uint8_t *buf, int size)
{
int i = 0;
#if HAVE_FAST_UNALIGNED
/* we check i < size instead of i + 3 / 7 because it is
* simpler and there must be FF_INPUT_BUFFER_PADDING_SIZE
* bytes at the end.
*/
# if HAVE_FAST_64BIT
while (i < size &&
!((~*(const uint64_t *)(buf + i) &
(*(const uint64_t *)(buf + i) - 0x0101010101010101ULL)) &
0x8080808080808080ULL))
i += 8;
# else
while (i < size &&
!((~*(const uint32_t *)(buf + i) &
(*(const uint32_t *)(buf + i) - 0x01010101U)) &
0x80808080U))
i += 4;
# endif
#endif
for (; i < size; i++)
if (!buf[i])
break;
return i;
}
av_cold void ff_h264dsp_init(H264DSPContext *c, const int bit_depth,
const int chroma_format_idc)
{
@ -178,7 +151,7 @@ av_cold void ff_h264dsp_init(H264DSPContext *c, const int bit_depth,
H264_DSP(8);
break;
}
c->h264_find_start_code_candidate = h264_find_start_code_candidate_c;
c->h264_find_start_code_candidate = ff_startcode_find_candidate_c;
if (ARCH_AARCH64) ff_h264dsp_init_aarch64(c, bit_depth, chroma_format_idc);
if (ARCH_ARM) ff_h264dsp_init_arm(c, bit_depth, chroma_format_idc);

57
libavcodec/startcode.c Normal file
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@ -0,0 +1,57 @@
/*
* Copyright (c) 2003-2010 Michael Niedermayer <michaelni@gmx.at>
*
* 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
* Accelerated start code search function for start codes common to
* MPEG-1/2/4 video, VC-1, H.264/5
* @author Michael Niedermayer <michaelni@gmx.at>
*/
#include "startcode.h"
#include "config.h"
int ff_startcode_find_candidate_c(const uint8_t *buf, int size)
{
int i = 0;
#if HAVE_FAST_UNALIGNED
/* we check i < size instead of i + 3 / 7 because it is
* simpler and there must be FF_INPUT_BUFFER_PADDING_SIZE
* bytes at the end.
*/
# if HAVE_FAST_64BIT
while (i < size &&
!((~*(const uint64_t *)(buf + i) &
(*(const uint64_t *)(buf + i) - 0x0101010101010101ULL)) &
0x8080808080808080ULL))
i += 8;
# else
while (i < size &&
!((~*(const uint32_t *)(buf + i) &
(*(const uint32_t *)(buf + i) - 0x01010101U)) &
0x80808080U))
i += 4;
# endif
#endif
for (; i < size; i++)
if (!buf[i])
break;
return i;
}

35
libavcodec/startcode.h Normal file
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@ -0,0 +1,35 @@
/*
* Copyright (c) 2003-2010 Michael Niedermayer <michaelni@gmx.at>
*
* 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
* Accelerated start code search function for start codes common to
* MPEG-1/2/4 video, VC-1, H.264/5
* @author Michael Niedermayer <michaelni@gmx.at>
*/
#ifndef AVCODEC_STARTCODE_H
#define AVCODEC_STARTCODE_H
#include <stdint.h>
int ff_startcode_find_candidate_c(const uint8_t *buf, int size);
#endif /* AVCODEC_STARTCODE_H */