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move adler32 to libavutil

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Originally committed as revision 5731 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Måns Rullgård 2006-07-13 21:29:01 +00:00
parent 43865cf092
commit b9a73d8d2f
7 changed files with 59 additions and 48 deletions
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4
libavformat/Makefile
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@ -76,8 +76,8 @@ OBJS-$(CONFIG_MPEGTS_DEMUXER) += mpegts.o
OBJS-$(CONFIG_MPEGTS_MUXER) += mpegtsenc.o
OBJS-$(CONFIG_MPJPEG_MUXER) += mpjpeg.o
OBJS-$(CONFIG_NSV_DEMUXER) += nsvdec.o riff.o
OBJS-$(CONFIG_NUT_DEMUXER) += nut.o riff.o crc.o
OBJS-$(CONFIG_NUT_MUXER) += nut.o riff.o crc.o
OBJS-$(CONFIG_NUT_DEMUXER) += nut.o riff.o
OBJS-$(CONFIG_NUT_MUXER) += nut.o riff.o
OBJS-$(CONFIG_NUV_DEMUXER) += nuv.o riff.o
OBJS-$(CONFIG_OGG_DEMUXER) += ogg2.o \
oggparsevorbis.o \

1
libavformat/avio.h
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@ -160,7 +160,6 @@ int url_close_dyn_buf(ByteIOContext *s, uint8_t **pbuffer);
unsigned long get_checksum(ByteIOContext *s);
void init_checksum(ByteIOContext *s, unsigned long (*update_checksum)(unsigned long c, const uint8_t *p, unsigned int len), unsigned long checksum);
unsigned long update_adler32(unsigned long adler, const uint8_t *buf, unsigned int len);
/* file.c */
extern URLProtocol file_protocol;

46
libavformat/crc.c
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@ -17,45 +17,7 @@
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include "avformat.h"
/* adler32.c -- compute the Adler-32 checksum of a data stream
* Copyright (C) 1995 Mark Adler
* For conditions of distribution and use, see copyright notice in zlib.h
*/
#define BASE 65521L /* largest prime smaller than 65536 */
#define NMAX 5552
/* NMAX is the largest n such that 255n(n+1)/2 + (n+1)(BASE-1) <= 2^32-1 */
#define DO1(buf) {s1 += *buf++; s2 += s1;}
#define DO2(buf) DO1(buf); DO1(buf);
#define DO4(buf) DO2(buf); DO2(buf);
#define DO8(buf) DO4(buf); DO4(buf);
#define DO16(buf) DO8(buf); DO8(buf);
unsigned long update_adler32(unsigned long adler, const uint8_t *buf, unsigned int len)
{
unsigned long s1 = adler & 0xffff;
unsigned long s2 = (adler >> 16) & 0xffff;
int k;
if (buf == NULL) return 1L;
while (len > 0) {
k = len < NMAX ? len : NMAX;
len -= k;
while (k >= 16) {
DO16(buf);
k -= 16;
}
if (k != 0) do {
DO1(buf);
} while (--k);
s1 %= BASE;
s2 %= BASE;
}
return (s2 << 16) | s1;
}
#include "adler32.h"
#ifdef CONFIG_CRC_MUXER
typedef struct CRCState {
@ -67,7 +29,7 @@ static int crc_write_header(struct AVFormatContext *s)
CRCState *crc = s->priv_data;
/* init CRC */
crc->crcval = update_adler32(0, NULL, 0);
crc->crcval = av_adler32_update(0, NULL, 0);
return 0;
}
@ -75,7 +37,7 @@ static int crc_write_header(struct AVFormatContext *s)
static int crc_write_packet(struct AVFormatContext *s, AVPacket *pkt)
{
CRCState *crc = s->priv_data;
crc->crcval = update_adler32(crc->crcval, pkt->data, pkt->size);
crc->crcval = av_adler32_update(crc->crcval, pkt->data, pkt->size);
return 0;
}
@ -94,7 +56,7 @@ static int crc_write_trailer(struct AVFormatContext *s)
#ifdef CONFIG_FRAMECRC_MUXER
static int framecrc_write_packet(struct AVFormatContext *s, AVPacket *pkt)
{
uint32_t crc = update_adler32(0, pkt->data, pkt->size);
uint32_t crc = av_adler32_update(0, pkt->data, pkt->size);
char buf[256];
snprintf(buf, sizeof(buf), "%d, %"PRId64", %d, 0x%08x\n", pkt->stream_index, pkt->dts, pkt->size, crc);

5
libavformat/nut.c
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@ -34,6 +34,7 @@
#include "avformat.h"
#include "mpegaudio.h"
#include "riff.h"
#include "adler32.h"
#undef NDEBUG
#include <assert.h>
@ -330,7 +331,7 @@ static int get_packetheader(NUTContext *nut, ByteIOContext *bc, int calculate_ch
size= get_v(bc);
init_checksum(bc, calculate_checksum ? update_adler32 : NULL, 0);
init_checksum(bc, calculate_checksum ? av_adler32_update : NULL, 0);
nut->packet_start[2] = start;
nut->written_packet_size= size;
@ -475,7 +476,7 @@ static int put_packetheader(NUTContext *nut, ByteIOContext *bc, int max_size, in
put_v(bc, nut->written_packet_size); /* forward ptr */
if(calculate_checksum)
init_checksum(bc, update_adler32, 0);
init_checksum(bc, av_adler32_update, 0);
return 0;
}

3
libavutil/Makefile
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@ -12,9 +12,10 @@ OBJS= mathematics.o \
intfloat_readwrite.o \
crc.o \
md5.o \
adler32.o
HEADERS = avutil.h common.h mathematics.h integer.h rational.h \
intfloat_readwrite.h md5.h
intfloat_readwrite.h md5.h adler32.h
NAME=avutil
ifeq ($(BUILD_SHARED),yes)

41
libavutil/adler32.c Normal file
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@ -0,0 +1,41 @@
/* adler32.c -- compute the Adler-32 checksum of a data stream
* Copyright (C) 1995 Mark Adler
* For conditions of distribution and use, see copyright notice in zlib.h
*/
#include "common.h"
#include "adler32.h"
#define BASE 65521L /* largest prime smaller than 65536 */
#define NMAX 5552
/* NMAX is the largest n such that 255n(n+1)/2 + (n+1)(BASE-1) <= 2^32-1 */
#define DO1(buf) {s1 += *buf++; s2 += s1;}
#define DO2(buf) DO1(buf); DO1(buf);
#define DO4(buf) DO2(buf); DO2(buf);
#define DO8(buf) DO4(buf); DO4(buf);
#define DO16(buf) DO8(buf); DO8(buf);
unsigned long av_adler32_update(unsigned long adler, const uint8_t *buf, unsigned int len)
{
unsigned long s1 = adler & 0xffff;
unsigned long s2 = (adler >> 16) & 0xffff;
int k;
if (buf == NULL) return 1L;
while (len > 0) {
k = len < NMAX ? len : NMAX;
len -= k;
while (k >= 16) {
DO16(buf);
k -= 16;
}
if (k != 0) do {
DO1(buf);
} while (--k);
s1 %= BASE;
s2 %= BASE;
}
return (s2 << 16) | s1;
}

7
libavutil/adler32.h Normal file
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@ -0,0 +1,7 @@
#ifndef ADLER32_H
#define ADLER32_H
unsigned long av_adler32_update(unsigned long adler, const uint8_t *buf,
unsigned int len);
#endif