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ffprobe: implement subsection field selection through the -show_entries option

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pull/8/head
Stefano Sabatini 13 years ago
parent f67ebf5b77
commit 196765a7cc
3 changed files with 241 additions and 40 deletions
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  1. 1
      Changelog
  2. 53
      doc/ffprobe.texi
  3. 227
      ffprobe.c

1
Changelog
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@ -27,6 +27,7 @@ version <next>:
- AST demuxer
- new expansion syntax for drawtext
- BRender PIX image decoder
- ffprobe -show_entries option
version 1.0:

53
doc/ffprobe.texi
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@ -133,6 +133,59 @@ Like @option{-show_format}, but only prints the specified entry of the
container format information, rather than all. This option may be given more
than once, then all specified entries will be shown.
This option is deprecated, use @code{show_entries} instead.
@item -show_entries @var{section_entries}
Set list of entries to show.
Entries are specified according to the following
syntax. @var{section_entries} contains a list of section entries
separated by @code{:}. Each section entry is composed by a section
name (or unique name), optionally followed by a list of entries local
to that section, separated by @code{,}.
If section name is specified but is followed by no @code{=}, all
entries are printed to output, together with all the contained
sections. Otherwise only the entries specified in the local section
entries list are printed. In particular, if @code{=} is specified but
the list of local entries is empty, then no entries will be shown for
that section.
Note that the order of specification of the local section entries is
not honored in the output, and the usual display order will be
retained.
The formal syntax is given by:
@example
@var{LOCAL_SECTION_ENTRIES} ::= @var{SECTION_ENTRY_NAME}[,@var{LOCAL_SECTION_ENTRIES}]
@var{SECTION_ENTRY} ::= @var{SECTION_NAME}[=[@var{LOCAL_SECTION_ENTRIES}]]
@var{SECTION_ENTRIES} ::= @var{SECTION_ENTRY}[:@var{SECTION_ENTRIES}]
@end example
For example, to show only the index and type of each stream, and the PTS
time, duration time, and stream index of the packets, you can specify
the argument:
@example
packet=pts_time,duration_time,stream_index : stream=index,codec_type
@end example
To show all the entries in the section "format", but only the codec
type in the section "stream", specify the argument:
@example
format : stream=codec_type
@end example
To show all the tags in the stream and format sections:
@example
format_tags : format_tags
@end example
To show only the @code{title} tag (if available) in the stream
sections:
@example
stream_tags=title
@end example
@item -show_packets
Show information about each packet contained in the input multimedia
stream.

227
ffprobe.c
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@ -55,9 +55,9 @@ static int do_read_packets = 0;
static int do_show_error = 0;
static int do_show_format = 0;
static int do_show_frames = 0;
static AVDictionary *fmt_entries_to_show = NULL;
static int do_show_packets = 0;
static int do_show_streams = 0;
static int do_show_stream_disposition = 0;
static int do_show_data = 0;
static int do_show_program_version = 0;
static int do_show_library_versions = 0;
@ -73,6 +73,8 @@ static char *stream_specifier;
/* section structure definition */
#define SECTION_MAX_NB_CHILDREN 10
struct section {
int id; ///< unique id identifying a section
const char *name;
@ -82,7 +84,11 @@ struct section {
#define SECTION_FLAG_HAS_VARIABLE_FIELDS 4 ///< the section may contain a variable number of fields with variable keys.
/// For these sections the element_name field is mandatory.
int flags;
int children_ids[SECTION_MAX_NB_CHILDREN+1]; ///< list of children section IDS, terminated by -1
const char *element_name; ///< name of the contained element, if provided
const char *unique_name; ///< unique section name, in case the name is ambiguous
AVDictionary *entries_to_show;
int show_all_entries;
};
typedef enum {
@ -106,24 +112,26 @@ typedef enum {
SECTION_ID_STREAM_TAGS,
} SectionID;
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_FLAG_HAS_VARIABLE_FIELDS, .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_FLAG_HAS_VARIABLE_FIELDS, .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" },
[SECTION_ID_PACKETS] = { SECTION_ID_PACKETS, "packets", SECTION_FLAG_IS_ARRAY },
[SECTION_ID_PACKETS_AND_FRAMES] = { SECTION_ID_PACKETS_AND_FRAMES, "packets_and_frames", SECTION_FLAG_IS_ARRAY },
[SECTION_ID_PROGRAM_VERSION] = { SECTION_ID_PROGRAM_VERSION, "program_version" },
[SECTION_ID_ROOT] = { SECTION_ID_ROOT, "root", SECTION_FLAG_IS_WRAPPER },
[SECTION_ID_STREAM] = { SECTION_ID_STREAM, "stream" },
[SECTION_ID_STREAM_DISPOSITION] = { SECTION_ID_STREAM_DISPOSITION, "disposition" },
[SECTION_ID_STREAMS] = { SECTION_ID_STREAMS, "streams", SECTION_FLAG_IS_ARRAY },
[SECTION_ID_STREAM_TAGS] = { SECTION_ID_STREAM_TAGS, "tags", SECTION_FLAG_HAS_VARIABLE_FIELDS, .element_name = "tag" },
static struct section sections[] = {
[SECTION_ID_ERROR] = { SECTION_ID_ERROR, "error", 0, { -1 } },
[SECTION_ID_FORMAT] = { SECTION_ID_FORMAT, "format", 0, { SECTION_ID_FORMAT_TAGS, -1 } },
[SECTION_ID_FORMAT_TAGS] = { SECTION_ID_FORMAT_TAGS, "tags", SECTION_FLAG_HAS_VARIABLE_FIELDS, { -1 }, .element_name = "tag", .unique_name = "format_tags" },
[SECTION_ID_FRAMES] = { SECTION_ID_FRAMES, "frames", SECTION_FLAG_IS_ARRAY, { SECTION_ID_FRAME, -1 } },
[SECTION_ID_FRAME] = { SECTION_ID_FRAME, "frame", 0, { SECTION_ID_FRAME_TAGS, -1 } },
[SECTION_ID_FRAME_TAGS] = { SECTION_ID_FRAME_TAGS, "tags", SECTION_FLAG_HAS_VARIABLE_FIELDS, { -1 }, .element_name = "tag", .unique_name = "frame_tags" },
[SECTION_ID_LIBRARY_VERSIONS] = { SECTION_ID_LIBRARY_VERSIONS, "library_versions", SECTION_FLAG_IS_ARRAY, { SECTION_ID_LIBRARY_VERSION, -1 } },
[SECTION_ID_LIBRARY_VERSION] = { SECTION_ID_LIBRARY_VERSION, "library_version", 0, { -1 } },
[SECTION_ID_PACKETS] = { SECTION_ID_PACKETS, "packets", SECTION_FLAG_IS_ARRAY, { SECTION_ID_PACKET, -1} },
[SECTION_ID_PACKETS_AND_FRAMES] = { SECTION_ID_PACKETS_AND_FRAMES, "packets_and_frames", SECTION_FLAG_IS_ARRAY, { SECTION_ID_PACKET, -1} },
[SECTION_ID_PACKET] = { SECTION_ID_PACKET, "packet", 0, { -1 } },
[SECTION_ID_PROGRAM_VERSION] = { SECTION_ID_PROGRAM_VERSION, "program_version", 0, { -1 } },
[SECTION_ID_ROOT] = { SECTION_ID_ROOT, "root", SECTION_FLAG_IS_WRAPPER,
{ SECTION_ID_FORMAT, SECTION_ID_FRAMES, SECTION_ID_STREAMS, SECTION_ID_PACKETS,
SECTION_ID_ERROR, SECTION_ID_PROGRAM_VERSION, SECTION_ID_LIBRARY_VERSIONS, -1} },
[SECTION_ID_STREAMS] = { SECTION_ID_STREAMS, "streams", SECTION_FLAG_IS_ARRAY, { SECTION_ID_STREAM, -1 } },
[SECTION_ID_STREAM] = { SECTION_ID_STREAM, "stream", 0, { SECTION_ID_STREAM_DISPOSITION, SECTION_ID_STREAM_TAGS, -1 } },
[SECTION_ID_STREAM_DISPOSITION] = { SECTION_ID_STREAM_DISPOSITION, "disposition", 0, { -1 }, .unique_name = "stream_disposition" },
[SECTION_ID_STREAM_TAGS] = { SECTION_ID_STREAM_TAGS, "tags", SECTION_FLAG_HAS_VARIABLE_FIELDS, { -1 }, .element_name = "tag", .unique_name = "stream_tags" },
};
static const OptionDef *options;
@ -146,7 +154,9 @@ static int *selected_streams;
static void exit_program(void)
{
av_dict_free(&fmt_entries_to_show);
int i;
for (i = 0; i < FF_ARRAY_ELEMS(sections); i++)
av_dict_free(&(sections[i].entries_to_show));
}
struct unit_value {
@ -375,9 +385,9 @@ static inline void writer_print_section_footer(WriterContext *wctx)
static inline void writer_print_integer(WriterContext *wctx,
const char *key, long long int val)
{
if ((wctx->section[wctx->level]->id != SECTION_ID_FORMAT
&& wctx->section[wctx->level]->id != SECTION_ID_FORMAT_TAGS) ||
!fmt_entries_to_show || av_dict_get(fmt_entries_to_show, key, NULL, 0)) {
const struct section *section = wctx->section[wctx->level];
if (section->show_all_entries || av_dict_get(section->entries_to_show, key, NULL, 0)) {
wctx->writer->print_integer(wctx, key, val);
wctx->nb_item[wctx->level]++;
}
@ -386,11 +396,12 @@ static inline void writer_print_integer(WriterContext *wctx,
static inline void writer_print_string(WriterContext *wctx,
const char *key, const char *val, int opt)
{
const struct section *section = wctx->section[wctx->level];
if (opt && !(wctx->writer->flags & WRITER_FLAG_DISPLAY_OPTIONAL_FIELDS))
return;
if ((wctx->section[wctx->level]->id != SECTION_ID_FORMAT
&& wctx->section[wctx->level]->id != SECTION_ID_FORMAT_TAGS) ||
!fmt_entries_to_show || av_dict_get(fmt_entries_to_show, key, NULL, 0)) {
if (section->show_all_entries || av_dict_get(section->entries_to_show, key, NULL, 0)) {
wctx->writer->print_string(wctx, key, val);
wctx->nb_item[wctx->level]++;
}
@ -1706,6 +1717,7 @@ static void show_stream(WriterContext *w, AVFormatContext *fmt_ctx, int stream_i
print_int(name, !!(stream->disposition & AV_DISPOSITION_##flagname)); \
} while (0)
if (do_show_stream_disposition) {
writer_print_section_header(w, SECTION_ID_STREAM_DISPOSITION);
PRINT_DISPOSITION(DEFAULT, "default");
PRINT_DISPOSITION(DUB, "dub");
@ -1719,6 +1731,7 @@ static void show_stream(WriterContext *w, AVFormatContext *fmt_ctx, int stream_i
PRINT_DISPOSITION(CLEAN_EFFECTS, "clean_effects");
PRINT_DISPOSITION(ATTACHED_PIC, "attached_pic");
writer_print_section_footer(w);
}
show_tags(w, stream->metadata, SECTION_ID_STREAM_TAGS);
@ -1958,11 +1971,100 @@ static int opt_format(void *optctx, const char *opt, const char *arg)
return 0;
}
static inline void mark_section_show_entries(SectionID section_id,
int show_all_entries, AVDictionary *entries)
{
struct section *section = &sections[section_id];
section->show_all_entries = show_all_entries;
if (show_all_entries) {
SectionID *id;
for (id = section->children_ids; *id != -1; id++)
mark_section_show_entries(*id, show_all_entries, entries);
} else {
av_dict_copy(&section->entries_to_show, entries, 0);
}
}
static int match_section(const char *section_name,
int show_all_entries, AVDictionary *entries)
{
int i, ret = 0;
for (i = 0; i < FF_ARRAY_ELEMS(sections); i++) {
const struct section *section = &sections[i];
if (!strcmp(section_name, section->name) ||
(section->unique_name && !strcmp(section_name, section->unique_name))) {
av_log(NULL, AV_LOG_DEBUG,
"'%s' matches section with unique name '%s'\n", section_name,
(char *)av_x_if_null(section->unique_name, section->name));
ret++;
mark_section_show_entries(section->id, show_all_entries, entries);
}
}
return ret;
}
static int opt_show_entries(void *optctx, const char *opt, const char *arg)
{
const char *p = arg;
int ret = 0;
while (*p) {
AVDictionary *entries = NULL;
char *section_name = av_get_token(&p, "=:");
int show_all_entries = 0;
if (!section_name) {
av_log(NULL, AV_LOG_ERROR,
"Missing section name for option '%s'\n", opt);
return AVERROR(EINVAL);
}
if (*p == '=') {
p++;
while (*p && *p != ':') {
char *entry = av_get_token(&p, ",:");
if (!entry)
break;
av_log(NULL, AV_LOG_VERBOSE,
"Adding '%s' to the entries to show in section '%s'\n",
entry, section_name);
av_dict_set(&entries, entry, "", AV_DICT_DONT_STRDUP_KEY);
if (*p == ',')
p++;
}
} else {
show_all_entries = 1;
}
ret = match_section(section_name, show_all_entries, entries);
if (ret == 0) {
av_log(NULL, AV_LOG_ERROR, "No match for section '%s'\n", section_name);
ret = AVERROR(EINVAL);
}
av_free(section_name);
if (ret <= 0)
break;
if (*p)
p++;
}
return ret;
}
static int opt_show_format_entry(void *optctx, const char *opt, const char *arg)
{
do_show_format = 1;
av_dict_set(&fmt_entries_to_show, arg, "", 0);
return 0;
char *buf = av_asprintf("format=%s", arg);
int ret;
av_log(NULL, AV_LOG_WARNING,
"Option '%s' is deprecated, use '-show_entries format=%s' instead\n",
opt, arg);
ret = opt_show_entries(optctx, opt, buf);
av_free(buf);
return ret;
}
static void opt_input_file(void *optctx, const char *arg)
@ -2005,11 +2107,26 @@ static int opt_pretty(void *optctx, const char *opt, const char *arg)
static int opt_show_versions(const char *opt, const char *arg)
{
do_show_program_version = 1;
do_show_library_versions = 1;
mark_section_show_entries(SECTION_ID_PROGRAM_VERSION, 1, NULL);
mark_section_show_entries(SECTION_ID_LIBRARY_VERSION, 1, NULL);
return 0;
}
#define DEFINE_OPT_SHOW_SECTION(section, target_section_id) \
static int opt_show_##section(const char *opt, const char *arg) \
{ \
mark_section_show_entries(SECTION_ID_##target_section_id, 1, NULL); \
return 0; \
}
DEFINE_OPT_SHOW_SECTION(error, ERROR);
DEFINE_OPT_SHOW_SECTION(format, FORMAT);
DEFINE_OPT_SHOW_SECTION(frames, FRAMES);
DEFINE_OPT_SHOW_SECTION(library_versions, LIBRARY_VERSIONS);
DEFINE_OPT_SHOW_SECTION(packets, PACKETS);
DEFINE_OPT_SHOW_SECTION(program_version, PROGRAM_VERSION);
DEFINE_OPT_SHOW_SECTION(streams, STREAMS);
static const OptionDef real_options[] = {
#include "cmdutils_common_opts.h"
{ "f", HAS_ARG, {.func_arg = opt_format}, "force format", "format" },
@ -2026,17 +2143,19 @@ static const OptionDef real_options[] = {
{ "of", OPT_STRING | HAS_ARG, {(void*)&print_format}, "alias for -print_format", "format" },
{ "select_streams", OPT_STRING | HAS_ARG, {(void*)&stream_specifier}, "select the specified streams", "stream_specifier" },
{ "show_data", OPT_BOOL, {(void*)&do_show_data}, "show packets data" },
{ "show_error", OPT_BOOL, {(void*)&do_show_error} , "show probing error" },
{ "show_format", OPT_BOOL, {&do_show_format} , "show format/container info" },
{ "show_frames", OPT_BOOL, {(void*)&do_show_frames} , "show frames info" },
{ "show_error", 0, {(void*)&opt_show_error}, "show probing error" },
{ "show_format", 0, {(void*)&opt_show_format}, "show format/container info" },
{ "show_frames", 0, {(void*)&opt_show_frames}, "show frames info" },
{ "show_format_entry", HAS_ARG, {.func_arg = opt_show_format_entry},
"show a particular entry from the format/container info", "entry" },
{ "show_packets", OPT_BOOL, {&do_show_packets}, "show packets info" },
{ "show_streams", OPT_BOOL, {&do_show_streams}, "show streams info" },
{ "show_entries", HAS_ARG, {.func_arg = opt_show_entries},
"show a set of specified entries", "entry_list" },
{ "show_packets", 0, {(void*)&opt_show_packets}, "show packets info" },
{ "show_streams", 0, {(void*)&opt_show_streams}, "show streams info" },
{ "count_frames", OPT_BOOL, {(void*)&do_count_frames}, "count the number of frames per stream" },
{ "count_packets", OPT_BOOL, {(void*)&do_count_packets}, "count the number of packets per stream" },
{ "show_program_version", OPT_BOOL, {(void*)&do_show_program_version}, "show ffprobe version" },
{ "show_library_versions", OPT_BOOL, {(void*)&do_show_library_versions}, "show library versions" },
{ "show_program_version", 0, {(void*)&opt_show_program_version}, "show ffprobe version" },
{ "show_library_versions", 0, {(void*)&opt_show_library_versions}, "show library versions" },
{ "show_versions", 0, {(void*)&opt_show_versions}, "show program and library versions" },
{ "show_private_data", OPT_BOOL, {(void*)&show_private_data}, "show private data" },
{ "private", OPT_BOOL, {(void*)&show_private_data}, "same as show_private_data" },
@ -2046,13 +2165,30 @@ static const OptionDef real_options[] = {
{ NULL, },
};
static inline int check_section_show_entries(int section_id)
{
int *id;
struct section *section = &sections[section_id];
if (sections[section_id].show_all_entries || sections[section_id].entries_to_show)
return 1;
for (id = section->children_ids; *id != -1; id++)
if (check_section_show_entries(*id))
return 1;
return 0;
}
#define SET_DO_SHOW(id, varname) do { \
if (check_section_show_entries(SECTION_ID_##id)) \
do_show_##varname = 1; \
} while (0)
int main(int argc, char **argv)
{
const Writer *w;
WriterContext *wctx;
char *buf;
char *w_name = NULL, *w_args = NULL;
int ret;
int ret, i;
av_log_set_flags(AV_LOG_SKIP_REPEATED);
atexit(exit_program);
@ -2069,6 +2205,16 @@ int main(int argc, char **argv)
show_banner(argc, argv, options);
parse_options(NULL, argc, argv, options, opt_input_file);
/* mark things to show, based on -show_entries */
SET_DO_SHOW(ERROR, error);
SET_DO_SHOW(FORMAT, format);
SET_DO_SHOW(FRAMES, frames);
SET_DO_SHOW(LIBRARY_VERSIONS, library_versions);
SET_DO_SHOW(PACKETS, packets);
SET_DO_SHOW(PROGRAM_VERSION, program_version);
SET_DO_SHOW(STREAMS, streams);
SET_DO_SHOW(STREAM_DISPOSITION, stream_disposition);
if (do_bitexact && (do_show_program_version || do_show_library_versions)) {
av_log(NULL, AV_LOG_ERROR,
"-bitexact and -show_program_version or -show_library_versions "
@ -2125,7 +2271,8 @@ end:
av_freep(&print_format);
uninit_opts();
av_dict_free(&fmt_entries_to_show);
for (i = 0; i < FF_ARRAY_ELEMS(sections); i++)
av_dict_free(&(sections[i].entries_to_show));
avformat_network_deinit();

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