[FFmpeg-devel] [PATCH] ffprobe: add INI writer
Stefano Sabatini
stefasab at gmail.com
Sun May 27 01:37:13 CEST 2012
Liberally based on the work of Luca Barbato <lu_zero at gentoo.org>, done
for libav/avprobe.
---
doc/ffprobe.texi | 24 +++++++++
ffprobe.c | 144 +++++++++++++++++++++++++++++++++++++++++++++++++++++-
2 files changed, 167 insertions(+), 1 deletions(-)
diff --git a/doc/ffprobe.texi b/doc/ffprobe.texi
index ed96575..b6af5df 100644
--- a/doc/ffprobe.texi
+++ b/doc/ffprobe.texi
@@ -269,6 +269,30 @@ CSV format.
This writer is equivalent to
@code{compact=item_sep=,:nokey=1:escape=csv}.
+ at section ini
+INI format output.
+
+Print output in an INI based format.
+
+The following convenctions are adopted:
+
+ at itemize
+ at item
+all key and values are UTF8
+ at item
+'.' is the subgroup separator
+ at item
+newline, tab, form feed, and back space characters are escaped
+ at item
+'\' is the escape character
+ at item
+'#' is the comment indicator
+ at item
+'=' is the key/value separators
+ at item
+':' is not used but usually parsed as key/value separator
+ at end itemize
+
@section json
JSON based format.
diff --git a/ffprobe.c b/ffprobe.c
index 1375f14..54ab9cd 100644
--- a/ffprobe.c
+++ b/ffprobe.c
@@ -715,6 +715,147 @@ static const Writer csv_writer = {
.flags = WRITER_FLAG_DISPLAY_OPTIONAL_FIELDS,
};
+/*
+ * INI format output
+ *
+ * - all key and values are UTF8
+ * - '.' is the subgroup separator
+ * - newlines and the following characters are escaped
+ * - '\' is the escape character
+ * - '#' is the comment
+ * - '=' is the key/value separators
+ * - ':' is not used but usually parsed as key/value separator
+ */
+
+typedef struct IniContext {
+ AVBPrint section_name;
+ int print_packets_and_frames;
+ int nb_frame;
+ int nb_packet;
+} IniContext;
+
+static av_cold int ini_init(WriterContext *wctx, const char *args, void *opaque)
+{
+ IniContext *ini = wctx->priv;
+ av_bprint_init(&ini->section_name, 1, AV_BPRINT_SIZE_UNLIMITED);
+ ini->nb_frame = ini->nb_packet = 0;
+
+ if (args) {
+ av_log(wctx, AV_LOG_ERROR, "No options supported by the ini format writer: '%s'\n", args);
+ return AVERROR(EINVAL);
+ }
+
+ return 0;
+}
+
+static av_cold void ini_uninit(WriterContext *wctx)
+{
+ IniContext *ini = wctx->priv;
+ av_bprint_finalize(&ini->section_name, NULL);
+}
+
+static void ini_print_header(WriterContext *wctx)
+{
+ printf("# ffprobe output\n\n");
+}
+
+static char *ini_escape_str(AVBPrint *dst, const char *src)
+{
+ int i = 0;
+ char c = 0;
+
+ while (c = src[i++]) {
+ switch (c) {
+ case '\b': av_bprintf(dst, "%s", "\\b"); break;
+ case '\f': av_bprintf(dst, "%s", "\\f"); break;
+ case '\n': av_bprintf(dst, "%s", "\\n"); break;
+ case '\r': av_bprintf(dst, "%s", "\\r"); break;
+ case '\t': av_bprintf(dst, "%s", "\\t"); break;
+ case '\\':
+ case '#' :
+ case '=' :
+ case ':' : av_bprint_chars(dst, '\\', 1);
+ default:
+ if ((unsigned char)c < 32)
+ av_bprintf(dst, "\\x00%02x", c & 0xff);
+ else
+ av_bprint_chars(dst, c, 1);
+ break;
+ }
+ }
+ return dst->str;
+}
+
+static void ini_print_chapter_header(WriterContext *wctx, const char *chapter)
+{
+ IniContext *ini = wctx->priv;
+ if (wctx->nb_chapter)
+ printf("\n");
+ ini->print_packets_and_frames = !strcmp("packets_and_frames", chapter);
+}
+
+static void ini_print_section_header(WriterContext *wctx, const char *section)
+{
+ IniContext *ini = wctx->priv;
+ int n;
+ if (wctx->nb_section)
+ printf("\n");
+ av_bprint_clear(&ini->section_name);
+ av_bprintf(&ini->section_name, "%s", section);
+
+ if (ini->print_packets_and_frames)
+ n = !strcmp(section, "packet") ? ini->nb_packet++ : ini->nb_frame++;
+ else
+ n = wctx->nb_section;
+ if (wctx->multiple_sections)
+ av_bprintf(&ini->section_name, ".%d", n);
+ printf("[%s]\n", ini->section_name.str);
+}
+
+static void ini_print_str(WriterContext *wctx, const char *key, const char *value)
+{
+ AVBPrint buf;
+ av_bprint_init(&buf, 1, AV_BPRINT_SIZE_UNLIMITED);
+
+ printf("%s=", ini_escape_str(&buf, key));
+ av_bprint_clear(&buf);
+ printf("%s\n", ini_escape_str(&buf, value));
+}
+
+static void ini_print_int(WriterContext *wctx, const char *key, long long int value)
+{
+ printf("%s=%lld\n", key, value);
+}
+
+static void ini_show_tags(WriterContext *wctx, AVDictionary *dict)
+{
+ IniContext *ini = wctx->priv;
+ AVDictionaryEntry *tag = NULL;
+ int is_first = 1;
+
+ while ((tag = av_dict_get(dict, "", tag, AV_DICT_IGNORE_SUFFIX))) {
+ if (is_first) {
+ printf("\n[%s.tags]\n", ini->section_name.str);
+ is_first = 0;
+ }
+ writer_print_string(wctx, tag->key, tag->value, 0);
+ }
+}
+
+static const Writer ini_writer = {
+ .name = "ini",
+ .priv_size = sizeof(IniContext),
+ .init = ini_init,
+ .uninit = ini_uninit,
+ .print_header = ini_print_header,
+ .print_chapter_header = ini_print_chapter_header,
+ .print_section_header = ini_print_section_header,
+ .print_integer = ini_print_int,
+ .print_string = ini_print_str,
+ .show_tags = ini_show_tags,
+ .flags = WRITER_FLAG_DISPLAY_OPTIONAL_FIELDS|WRITER_FLAG_PUT_PACKETS_AND_FRAMES_IN_SAME_CHAPTER,
+};
+
/* JSON output */
typedef struct {
@@ -1173,6 +1314,7 @@ static void writer_register_all(void)
writer_register(&default_writer);
writer_register(&compact_writer);
writer_register(&csv_writer);
+ writer_register(&ini_writer);
writer_register(&json_writer);
writer_register(&xml_writer);
}
@@ -1739,7 +1881,7 @@ static const OptionDef options[] = {
{ "pretty", 0, {(void*)&opt_pretty},
"prettify the format of displayed values, make it more human readable" },
{ "print_format", OPT_STRING | HAS_ARG, {(void*)&print_format},
- "set the output printing format (available formats are: default, compact, csv, json, xml)", "format" },
+ "set the output printing format (available formats are: default, compact, csv, ini, json, xml)", "format" },
{ "show_error", OPT_BOOL, {(void*)&do_show_error} , "show probing error" },
{ "show_format", OPT_BOOL, {(void*)&do_show_format} , "show format/container info" },
{ "show_frames", OPT_BOOL, {(void*)&do_show_frames} , "show frames info" },
--
1.7.5.4
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