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ffprobe: generalize nesting model for the default writer

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Regular section fields nested in a regular section are now prefixed by
the nested section name.

This is required by the pending change related to disposition.
This commit is contained in:
Stefano Sabatini 2012-09-26 12:56:32 +02:00
parent b6ea9c8765
commit 44c1cc3f8e
1 changed files with 40 additions and 15 deletions
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55
ffprobe.c
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@ -79,6 +79,7 @@ struct section {
#define SECTION_FLAG_IS_WRAPPER 1 ///< the section only contains other sections, but has no data at its own level
#define SECTION_FLAG_IS_ARRAY 2 ///< the section contains an array of elements of the same type
int flags;
const char *element_name; ///< name of the contained element, if provided
};
typedef enum {
@ -104,10 +105,10 @@ typedef enum {
static const struct section sections[] = {
[SECTION_ID_ERROR] = { SECTION_ID_ERROR, "error" },
[SECTION_ID_FORMAT] = { SECTION_ID_FORMAT, "format" },
[SECTION_ID_FORMAT_TAGS] = { SECTION_ID_FORMAT_TAGS, "tags" },
[SECTION_ID_FORMAT_TAGS] = { SECTION_ID_FORMAT_TAGS, "tags", .element_name = "tag" },
[SECTION_ID_FRAME] = { SECTION_ID_FRAME, "frame" },
[SECTION_ID_FRAMES] = { SECTION_ID_FRAMES, "frames", SECTION_FLAG_IS_ARRAY },
[SECTION_ID_FRAME_TAGS] = { SECTION_ID_FRAME_TAGS, "tags" },
[SECTION_ID_FRAME_TAGS] = { SECTION_ID_FRAME_TAGS, "tags", .element_name = "tag" },
[SECTION_ID_LIBRARY_VERSION] = { SECTION_ID_LIBRARY_VERSION, "library_version" },
[SECTION_ID_LIBRARY_VERSIONS] = { SECTION_ID_LIBRARY_VERSIONS, "library_versions", SECTION_FLAG_IS_ARRAY },
[SECTION_ID_PACKET] = { SECTION_ID_PACKET, "packet" },
@ -117,7 +118,7 @@ static const struct section sections[] = {
[SECTION_ID_ROOT] = { SECTION_ID_ROOT, "root", SECTION_FLAG_IS_WRAPPER },
[SECTION_ID_STREAM] = { SECTION_ID_STREAM, "stream" },
[SECTION_ID_STREAMS] = { SECTION_ID_STREAMS, "streams", SECTION_FLAG_IS_ARRAY },
[SECTION_ID_STREAM_TAGS] = { SECTION_ID_STREAM_TAGS, "tags" },
[SECTION_ID_STREAM_TAGS] = { SECTION_ID_STREAM_TAGS, "tags", .element_name = "tag" },
};
static const OptionDef *options;
@ -488,6 +489,8 @@ typedef struct DefaultContext {
const AVClass *class;
int nokey;
int noprint_wrappers;
int nested_section[SECTION_MAX_NB_LEVELS];
AVBPrint prefix[SECTION_MAX_NB_LEVELS];
} DefaultContext;
#define OFFSET(x) offsetof(DefaultContext, x)
@ -512,6 +515,25 @@ static inline char *upcase_string(char *dst, size_t dst_size, const char *src)
return dst;
}
static int default_init(WriterContext *wctx)
{
DefaultContext *def = wctx->priv;
int i;
for (i = 0; i < SECTION_MAX_NB_LEVELS; i++)
av_bprint_init(&def->prefix[i], 1, AV_BPRINT_SIZE_UNLIMITED);
return 0;
}
static void default_uninit(WriterContext *wctx)
{
DefaultContext *def = wctx->priv;
int i;
for (i = 0; i < SECTION_MAX_NB_LEVELS; i++)
av_bprint_finalize(&def->prefix[i], NULL);
}
static void default_print_section_header(WriterContext *wctx)
{
DefaultContext *def = wctx->priv;
@ -520,9 +542,16 @@ static void default_print_section_header(WriterContext *wctx)
const struct section *parent_section = wctx->level ?
wctx->section[wctx->level-1] : NULL;
if (def->noprint_wrappers ||
(parent_section &&
!(parent_section->flags & (SECTION_FLAG_IS_WRAPPER|SECTION_FLAG_IS_ARRAY))))
av_bprint_clear(&def->prefix[wctx->level]);
if (parent_section &&
!(parent_section->flags & (SECTION_FLAG_IS_WRAPPER|SECTION_FLAG_IS_ARRAY))) {
def->nested_section[wctx->level] = 1;
av_bprintf(&def->prefix[wctx->level], "%s%s:", def->prefix[wctx->level-1].str,
upcase_string(buf, sizeof(buf),
av_x_if_null(section->element_name, section->name)));
}
if (def->noprint_wrappers || def->nested_section[wctx->level])
return;
if (!(section->flags & (SECTION_FLAG_IS_WRAPPER|SECTION_FLAG_IS_ARRAY)))
@ -533,13 +562,9 @@ static void default_print_section_footer(WriterContext *wctx)
{
DefaultContext *def = wctx->priv;
const struct section *section = wctx->section[wctx->level];
const struct section *parent_section = wctx->level ?
wctx->section[wctx->level-1] : NULL;
char buf[32];
if (def->noprint_wrappers ||
(parent_section &&
!(parent_section->flags & (SECTION_FLAG_IS_WRAPPER|SECTION_FLAG_IS_ARRAY))))
if (def->noprint_wrappers || def->nested_section[wctx->level])
return;
if (!(section->flags & (SECTION_FLAG_IS_WRAPPER|SECTION_FLAG_IS_ARRAY)))
@ -549,11 +574,9 @@ static void default_print_section_footer(WriterContext *wctx)
static void default_print_str(WriterContext *wctx, const char *key, const char *value)
{
DefaultContext *def = wctx->priv;
const struct section *section = wctx->section[wctx->level];
const char *key_prefix = !strcmp(section->name, "tags") ? "TAG:" : "";
if (!def->nokey)
printf("%s%s=", key_prefix, key);
printf("%s%s=", def->prefix[wctx->level].str, key);
printf("%s\n", value);
}
@ -562,13 +585,15 @@ static void default_print_int(WriterContext *wctx, const char *key, long long in
DefaultContext *def = wctx->priv;
if (!def->nokey)
printf("%s=", key);
printf("%s%s=", def->prefix[wctx->level].str, key);
printf("%lld\n", value);
}
static const Writer default_writer = {
.name = "default",
.priv_size = sizeof(DefaultContext),
.init = default_init,
.uninit = default_uninit,
.print_section_header = default_print_section_header,
.print_section_footer = default_print_section_footer,
.print_integer = default_print_int,