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Move metadata API from lavf to lavu.

Browse Source 
Rename it to AVDictionary, since it will be used as such.  Tags
documentation and metadata conversion API is lavf-specific, so remains
there.
This commit is contained in:
Anton Khirnov 2011-05-22 12:45:00 +02:00
parent ac4a854811
commit d9f80ea2a7
9 changed files with 259 additions and 119 deletions
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5
doc/APIchanges
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@ -13,6 +13,11 @@ libavutil: 2011-04-18
API changes, most recent first:
2011-06-xx - xxxxxxx - lavu 51.5.0 - AVMetadata
Move AVMetadata from lavf to lavu and rename it to
AVDictionary -- new installed header dict.h.
All av_metadata_* functions renamed to av_dict_*.
2011-06-07 - a6703fa - lavu 51.4.0 - av_get_bytes_per_sample()
Add av_get_bytes_per_sample() in libavutil/samplefmt.h.
Deprecate av_get_bits_per_sample_fmt().

54
libavformat/avformat.h
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@ -40,6 +40,7 @@ const char *avformat_license(void);
#include <time.h>
#include <stdio.h> /* FILE */
#include "libavcodec/avcodec.h"
#include "libavutil/dict.h"
#include "avio.h"
#include "libavformat/version.h"
@ -106,21 +107,24 @@ struct AVFormatContext;
* variant_bitrate -- the total bitrate of the bitrate variant that the current stream is part of
*/
#define AV_METADATA_MATCH_CASE 1
#define AV_METADATA_IGNORE_SUFFIX 2
#define AV_METADATA_DONT_STRDUP_KEY 4
#define AV_METADATA_DONT_STRDUP_VAL 8
#define AV_METADATA_DONT_OVERWRITE 16 ///< Don't overwrite existing tags.
typedef struct {
char *key;
char *value;
}AVMetadataTag;
typedef struct AVMetadata AVMetadata;
#if FF_API_OLD_METADATA2
/**
* @defgroup old_metadata Old metadata API
* The following functions are deprecated, use
* their equivalents from libavutil/dict.h instead.
* @{
*/
#define AV_METADATA_MATCH_CASE AV_DICT_MATCH_CASE
#define AV_METADATA_IGNORE_SUFFIX AV_DICT_IGNORE_SUFFIX
#define AV_METADATA_DONT_STRDUP_KEY AV_DICT_DONT_STRDUP_KEY
#define AV_METADATA_DONT_STRDUP_VAL AV_DICT_DONT_STRDUP_VAL
#define AV_METADATA_DONT_OVERWRITE AV_DICT_DONT_OVERWRITE
typedef attribute_deprecated AVDictionary AVMetadata;
typedef attribute_deprecated AVDictionaryEntry AVMetadataTag;
typedef struct AVMetadataConv AVMetadataConv;
#endif
/**
* Get a metadata element with matching key.
@ -130,8 +134,8 @@ typedef struct AVMetadataConv AVMetadataConv;
* @param flags Allows case as well as suffix-insensitive comparisons.
* @return Found tag or NULL, changing key or value leads to undefined behavior.
*/
AVMetadataTag *
av_metadata_get(AVMetadata *m, const char *key, const AVMetadataTag *prev, int flags);
attribute_deprecated AVDictionaryEntry *
av_metadata_get(AVDictionary *m, const char *key, const AVDictionaryEntry *prev, int flags);
/**
* Set the given tag in *pm, overwriting an existing tag.
@ -143,30 +147,32 @@ av_metadata_get(AVMetadata *m, const char *key, const AVMetadataTag *prev, int f
* Passing a NULL value will cause an existing tag to be deleted.
* @return >= 0 on success otherwise an error code <0
*/
int av_metadata_set2(AVMetadata **pm, const char *key, const char *value, int flags);
attribute_deprecated int av_metadata_set2(AVDictionary **pm, const char *key, const char *value, int flags);
#if FF_API_OLD_METADATA2
/**
* This function is provided for compatibility reason and currently does nothing.
*/
attribute_deprecated void av_metadata_conv(struct AVFormatContext *ctx, const AVMetadataConv *d_conv,
const AVMetadataConv *s_conv);
#endif
/**
* Copy metadata from one AVMetadata struct into another.
* @param dst pointer to a pointer to a AVMetadata struct. If *dst is NULL,
* Copy metadata from one AVDictionary struct into another.
* @param dst pointer to a pointer to a AVDictionary struct. If *dst is NULL,
* this function will allocate a struct for you and put it in *dst
* @param src pointer to source AVMetadata struct
* @param src pointer to source AVDictionary struct
* @param flags flags to use when setting metadata in *dst
* @note metadata is read using the AV_METADATA_IGNORE_SUFFIX flag
*/
void av_metadata_copy(AVMetadata **dst, AVMetadata *src, int flags);
attribute_deprecated void av_metadata_copy(AVDictionary **dst, AVDictionary *src, int flags);
/**
* Free all the memory allocated for an AVMetadata struct.
* Free all the memory allocated for an AVDictionary struct.
*/
void av_metadata_free(AVMetadata **m);
attribute_deprecated void av_metadata_free(AVDictionary **m);
/**
* @}
*/
#endif
/* packet functions */

119
libavformat/metadata.c
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@ -21,107 +21,51 @@
#include <strings.h>
#include "avformat.h"
#include "metadata.h"
AVMetadataTag *
av_metadata_get(AVMetadata *m, const char *key, const AVMetadataTag *prev, int flags)
{
unsigned int i, j;
if(!m)
return NULL;
if(prev) i= prev - m->elems + 1;
else i= 0;
for(; i<m->count; i++){
const char *s= m->elems[i].key;
if(flags & AV_METADATA_MATCH_CASE) for(j=0; s[j] == key[j] && key[j]; j++);
else for(j=0; toupper(s[j]) == toupper(key[j]) && key[j]; j++);
if(key[j])
continue;
if(s[j] && !(flags & AV_METADATA_IGNORE_SUFFIX))
continue;
return &m->elems[i];
}
return NULL;
}
int av_metadata_set2(AVMetadata **pm, const char *key, const char *value, int flags)
{
AVMetadata *m= *pm;
AVMetadataTag *tag= av_metadata_get(m, key, NULL, flags);
if(!m)
m=*pm= av_mallocz(sizeof(*m));
if(tag){
if (flags & AV_METADATA_DONT_OVERWRITE)
return 0;
av_free(tag->value);
av_free(tag->key);
*tag= m->elems[--m->count];
}else{
AVMetadataTag *tmp= av_realloc(m->elems, (m->count+1) * sizeof(*m->elems));
if(tmp){
m->elems= tmp;
}else
return AVERROR(ENOMEM);
}
if(value){
if(flags & AV_METADATA_DONT_STRDUP_KEY){
m->elems[m->count].key = key;
}else
m->elems[m->count].key = av_strdup(key );
if(flags & AV_METADATA_DONT_STRDUP_VAL){
m->elems[m->count].value= value;
}else
m->elems[m->count].value= av_strdup(value);
m->count++;
}
if(!m->count) {
av_free(m->elems);
av_freep(pm);
}
return 0;
}
#include "libavutil/dict.h"
#if FF_API_OLD_METADATA2
AVDictionaryEntry *
av_metadata_get(AVDictionary *m, const char *key, const AVDictionaryEntry *prev, int flags)
{
return av_dict_get(m, key, prev, flags);
}
int av_metadata_set2(AVDictionary **pm, const char *key, const char *value, int flags)
{
return av_dict_set(pm, key, value, flags);
}
void av_metadata_conv(AVFormatContext *ctx, const AVMetadataConv *d_conv,
const AVMetadataConv *s_conv)
{
return;
}
void av_metadata_free(AVDictionary **pm)
{
av_dict_free(pm);
}
void av_metadata_copy(AVDictionary **dst, AVDictionary *src, int flags)
{
av_dict_copy(dst, src, flags);
}
#endif
void av_metadata_free(AVMetadata **pm)
{
AVMetadata *m= *pm;
if(m){
while(m->count--){
av_free(m->elems[m->count].key);
av_free(m->elems[m->count].value);
}
av_free(m->elems);
}
av_freep(pm);
}
void ff_metadata_conv(AVMetadata **pm, const AVMetadataConv *d_conv,
void ff_metadata_conv(AVDictionary **pm, const AVMetadataConv *d_conv,
const AVMetadataConv *s_conv)
{
/* TODO: use binary search to look up the two conversion tables
if the tables are getting big enough that it would matter speed wise */
const AVMetadataConv *sc, *dc;
AVMetadataTag *mtag = NULL;
AVMetadata *dst = NULL;
AVDictionaryEntry *mtag = NULL;
AVDictionary *dst = NULL;
const char *key;
if (d_conv == s_conv)
return;
while((mtag=av_metadata_get(*pm, "", mtag, AV_METADATA_IGNORE_SUFFIX))) {
while ((mtag = av_dict_get(*pm, "", mtag, AV_DICT_IGNORE_SUFFIX))) {
key = mtag->key;
if (s_conv)
for (sc=s_conv; sc->native; sc++)
@ -135,9 +79,9 @@ void ff_metadata_conv(AVMetadata **pm, const AVMetadataConv *d_conv,
key = dc->native;
break;
}
av_metadata_set2(&dst, key, mtag->value, 0);
av_dict_set(&dst, key, mtag->value, 0);
}
av_metadata_free(pm);
av_dict_free(pm);
*pm = dst;
}
@ -154,10 +98,3 @@ void ff_metadata_conv_ctx(AVFormatContext *ctx, const AVMetadataConv *d_conv,
ff_metadata_conv(&ctx->programs[i]->metadata, d_conv, s_conv);
}
void av_metadata_copy(AVMetadata **dst, AVMetadata *src, int flags)
{
AVMetadataTag *t = NULL;
while ((t = av_metadata_get(src, "", t, AV_METADATA_IGNORE_SUFFIX)))
av_metadata_set2(dst, t->key, t->value, flags);
}

6
libavformat/metadata.h
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@ -29,11 +29,7 @@
#include "avformat.h"
struct AVMetadata{
int count;
AVMetadataTag *elems;
};
#include "libavutil/dict.h"
struct AVMetadataConv{
const char *native;

2
libavutil/Makefile
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@ -27,6 +27,7 @@ HEADERS = adler32.h \
mathematics.h \
md5.h \
mem.h \
dict.h \
opt.h \
parseutils.h \
pixdesc.h \
@ -60,6 +61,7 @@ OBJS = adler32.o \
mathematics.o \
md5.o \
mem.o \
dict.o \
opt.o \
parseutils.o \
pixdesc.o \

2
libavutil/avutil.h
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@ -40,7 +40,7 @@
#define AV_VERSION(a, b, c) AV_VERSION_DOT(a, b, c)
#define LIBAVUTIL_VERSION_MAJOR 51
#define LIBAVUTIL_VERSION_MINOR 4
#define LIBAVUTIL_VERSION_MINOR 5
#define LIBAVUTIL_VERSION_MICRO 0
#define LIBAVUTIL_VERSION_INT AV_VERSION_INT(LIBAVUTIL_VERSION_MAJOR, \

110
libavutil/dict.c Normal file
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@ -0,0 +1,110 @@
/*
* copyright (c) 2009 Michael Niedermayer
*
* This file is part of Libav.
*
* Libav 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.
*
* Libav 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 Libav; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include <strings.h>
#include "dict.h"
#include "internal.h"
#include "mem.h"
AVDictionaryEntry *
av_dict_get(AVDictionary *m, const char *key, const AVDictionaryEntry *prev, int flags)
{
unsigned int i, j;
if(!m)
return NULL;
if(prev) i= prev - m->elems + 1;
else i= 0;
for(; i<m->count; i++){
const char *s= m->elems[i].key;
if(flags & AV_DICT_MATCH_CASE) for(j=0; s[j] == key[j] && key[j]; j++);
else for(j=0; toupper(s[j]) == toupper(key[j]) && key[j]; j++);
if(key[j])
continue;
if(s[j] && !(flags & AV_DICT_IGNORE_SUFFIX))
continue;
return &m->elems[i];
}
return NULL;
}
int av_dict_set(AVDictionary **pm, const char *key, const char *value, int flags)
{
AVDictionary *m = *pm;
AVDictionaryEntry *tag = av_dict_get(m, key, NULL, flags);
if(!m)
m = *pm = av_mallocz(sizeof(*m));
if(tag) {
if (flags & AV_DICT_DONT_OVERWRITE)
return 0;
av_free(tag->value);
av_free(tag->key);
*tag = m->elems[--m->count];
} else {
AVDictionaryEntry *tmp = av_realloc(m->elems, (m->count+1) * sizeof(*m->elems));
if(tmp) {
m->elems = tmp;
} else
return AVERROR(ENOMEM);
}
if (value) {
if (flags & AV_DICT_DONT_STRDUP_KEY) {
m->elems[m->count].key = key;
} else
m->elems[m->count].key = av_strdup(key );
if (flags & AV_DICT_DONT_STRDUP_VAL) {
m->elems[m->count].value = value;
} else
m->elems[m->count].value = av_strdup(value);
m->count++;
}
if (!m->count) {
av_free(m->elems);
av_freep(pm);
}
return 0;
}
void av_dict_free(AVDictionary **pm)
{
AVDictionary *m = *pm;
if (m) {
while(m->count--) {
av_free(m->elems[m->count].key);
av_free(m->elems[m->count].value);
}
av_free(m->elems);
}
av_freep(pm);
}
void av_dict_copy(AVDictionary **dst, AVDictionary *src, int flags)
{
AVDictionaryEntry *t = NULL;
while ((t = av_dict_get(src, "", t, AV_DICT_IGNORE_SUFFIX)))
av_dict_set(dst, t->key, t->value, flags);
}

78
libavutil/dict.h Normal file
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@ -0,0 +1,78 @@
/*
*
* This file is part of Libav.
*
* Libav 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.
*
* Libav 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 Libav; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
/**
* @file Public dictionary API.
*/
#ifndef AVUTIL_DICT_H
#define AVUTIL_DICT_H
#define AV_DICT_MATCH_CASE 1
#define AV_DICT_IGNORE_SUFFIX 2
#define AV_DICT_DONT_STRDUP_KEY 4
#define AV_DICT_DONT_STRDUP_VAL 8
#define AV_DICT_DONT_OVERWRITE 16 ///< Don't overwrite existing entries.
typedef struct {
char *key;
char *value;
} AVDictionaryEntry;
typedef struct AVDictionary AVDictionary;
/**
* Get a dictionary entry with matching key.
*
* @param prev Set to the previous matching element to find the next.
* If set to NULL the first matching element is returned.
* @param flags Allows case as well as suffix-insensitive comparisons.
* @return Found entry or NULL, changing key or value leads to undefined behavior.
*/
AVDictionaryEntry *
av_dict_get(AVDictionary *m, const char *key, const AVDictionaryEntry *prev, int flags);
/**
* Set the given entry in *pm, overwriting an existing entry.
*
* @param pm pointer to a pointer to a dictionary struct. If *pm is NULL
* a dictionary struct is allocated and put in *pm.
* @param key entry key to add to *pm (will be av_strduped depending on flags)
* @param value entry value to add to *pm (will be av_strduped depending on flags).
* Passing a NULL value will cause an existing tag to be deleted.
* @return >= 0 on success otherwise an error code <0
*/
int av_dict_set(AVDictionary **pm, const char *key, const char *value, int flags);
/**
* Copy entries from one AVDictionary struct into another.
* @param dst pointer to a pointer to a AVDictionary struct. If *dst is NULL,
* this function will allocate a struct for you and put it in *dst
* @param src pointer to source AVDictionary struct
* @param flags flags to use when setting entries in *dst
* @note metadata is read using the AV_DICT_IGNORE_SUFFIX flag
*/
void av_dict_copy(AVDictionary **dst, AVDictionary *src, int flags);
/**
* Free all the memory allocated for an AVDictionary struct.
*/
void av_dict_free(AVDictionary **m);
#endif // AVUTIL_DICT_H

6
libavutil/internal.h
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@ -37,6 +37,12 @@
#include "config.h"
#include "attributes.h"
#include "timer.h"
#include "dict.h"
struct AVDictionary {
int count;
AVDictionaryEntry *elems;
};
#ifndef attribute_align_arg
#if ARCH_X86_32 && AV_GCC_VERSION_AT_LEAST(4,2)