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FFmpeg/ffprobe.c

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/*
* Copyright (c) 2007-2010 Stefano Sabatini
*
* This file is part of FFmpeg.
*
* FFmpeg 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.
*
* FFmpeg 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 FFmpeg; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
/**
* @file
* simple media prober based on the FFmpeg libraries
*/
#include "config.h"
#include "libavformat/avformat.h"
#include "libavcodec/avcodec.h"
#include "libavutil/avstring.h"
#include "libavutil/opt.h"
#include "libavutil/pixdesc.h"
#include "libavutil/dict.h"
#include "libavdevice/avdevice.h"
#include "cmdutils.h"
const char program_name[] = "ffprobe";
const int program_birth_year = 2007;
static int do_show_error = 0;
static int do_show_format = 0;
static int do_show_packets = 0;
static int do_show_streams = 0;
static int show_value_unit = 0;
static int use_value_prefix = 0;
static int use_byte_value_binary_prefix = 0;
static int use_value_sexagesimal_format = 0;
static int show_private_data = 1;
static char *print_format;
static const OptionDef options[];
/* FFprobe context */
static const char *input_filename;
static AVInputFormat *iformat = NULL;
static const char *binary_unit_prefixes [] = { "", "Ki", "Mi", "Gi", "Ti", "Pi" };
static const char *decimal_unit_prefixes[] = { "", "K" , "M" , "G" , "T" , "P" };
static const char *unit_second_str = "s" ;
static const char *unit_hertz_str = "Hz" ;
static const char *unit_byte_str = "byte" ;
static const char *unit_bit_per_second_str = "bit/s";
void av_noreturn exit_program(int ret)
{
exit(ret);
}
struct unit_value {
union { double d; int i; } val;
const char *unit;
};
static char *value_string(char *buf, int buf_size, struct unit_value uv)
{
double vald;
int show_float = 0;
if (uv.unit == unit_second_str) {
vald = uv.val.d;
show_float = 1;
} else {
vald = uv.val.i;
}
if (uv.unit == unit_second_str && use_value_sexagesimal_format) {
double secs;
int hours, mins;
secs = vald;
mins = (int)secs / 60;
secs = secs - mins * 60;
hours = mins / 60;
mins %= 60;
snprintf(buf, buf_size, "%d:%02d:%09.6f", hours, mins, secs);
} else if (use_value_prefix) {
const char *prefix_string;
int index, l;
if (uv.unit == unit_byte_str && use_byte_value_binary_prefix) {
index = (int) (log(vald)/log(2)) / 10;
index = av_clip(index, 0, FF_ARRAY_ELEMS(binary_unit_prefixes) -1);
vald /= pow(2, index*10);
prefix_string = binary_unit_prefixes[index];
} else {
index = (int) (log10(vald)) / 3;
index = av_clip(index, 0, FF_ARRAY_ELEMS(decimal_unit_prefixes) -1);
vald /= pow(10, index*3);
prefix_string = decimal_unit_prefixes[index];
}
if (show_float || vald != (int)vald) l = snprintf(buf, buf_size, "%.3f", vald);
else l = snprintf(buf, buf_size, "%d", (int)vald);
snprintf(buf+l, buf_size-l, "%s%s%s", prefix_string || show_value_unit ? " " : "",
prefix_string, show_value_unit ? uv.unit : "");
} else {
int l;
if (show_float) l = snprintf(buf, buf_size, "%.3f", vald);
else l = snprintf(buf, buf_size, "%d", (int)vald);
snprintf(buf+l, buf_size-l, "%s%s", show_value_unit ? " " : "",
show_value_unit ? uv.unit : "");
}
return buf;
}
/* WRITERS API */
typedef struct WriterContext WriterContext;
#define WRITER_FLAG_DISPLAY_OPTIONAL_FIELDS 1
typedef struct Writer {
int priv_size; ///< private size for the writer context
const char *name;
int (*init) (WriterContext *wctx, const char *args, void *opaque);
void (*uninit)(WriterContext *wctx);
void (*print_header)(WriterContext *ctx);
void (*print_footer)(WriterContext *ctx);
void (*print_chapter_header)(WriterContext *wctx, const char *);
void (*print_chapter_footer)(WriterContext *wctx, const char *);
void (*print_section_header)(WriterContext *wctx, const char *);
void (*print_section_footer)(WriterContext *wctx, const char *);
void (*print_integer) (WriterContext *wctx, const char *, long long int);
void (*print_string) (WriterContext *wctx, const char *, const char *);
void (*show_tags) (WriterContext *wctx, AVDictionary *dict);
int flags; ///< a combination or WRITER_FLAG_*
} Writer;
struct WriterContext {
const AVClass *class; ///< class of the writer
const Writer *writer; ///< the Writer of which this is an instance
char *name; ///< name of this writer instance
void *priv; ///< private data for use by the filter
unsigned int nb_item; ///< number of the item printed in the given section, starting at 0
unsigned int nb_section; ///< number of the section printed in the given section sequence, starting at 0
unsigned int nb_chapter; ///< number of the chapter, starting at 0
};
static const char *writer_get_name(void *p)
{
WriterContext *wctx = p;
return wctx->writer->name;
}
static const AVClass writer_class = {
"Writer",
writer_get_name,
NULL,
LIBAVUTIL_VERSION_INT,
};
static void writer_close(WriterContext **wctx)
{
if (!*wctx)
return;
if ((*wctx)->writer->uninit)
(*wctx)->writer->uninit(*wctx);
av_freep(&((*wctx)->priv));
av_freep(wctx);
}
static int writer_open(WriterContext **wctx, const Writer *writer,
const char *args, void *opaque)
{
int ret = 0;
if (!(*wctx = av_malloc(sizeof(WriterContext)))) {
ret = AVERROR(ENOMEM);
goto fail;
}
if (!((*wctx)->priv = av_mallocz(writer->priv_size))) {
ret = AVERROR(ENOMEM);
goto fail;
}
(*wctx)->class = &writer_class;
(*wctx)->writer = writer;
if ((*wctx)->writer->init)
ret = (*wctx)->writer->init(*wctx, args, opaque);
if (ret < 0)
goto fail;
return 0;
fail:
writer_close(wctx);
return ret;
}
static inline void writer_print_header(WriterContext *wctx)
{
if (wctx->writer->print_header)
wctx->writer->print_header(wctx);
wctx->nb_chapter = 0;
}
static inline void writer_print_footer(WriterContext *wctx)
{
if (wctx->writer->print_footer)
wctx->writer->print_footer(wctx);
}
static inline void writer_print_chapter_header(WriterContext *wctx,
const char *header)
{
if (wctx->writer->print_chapter_header)
wctx->writer->print_chapter_header(wctx, header);
wctx->nb_section = 0;
}
static inline void writer_print_chapter_footer(WriterContext *wctx,
const char *footer)
{
if (wctx->writer->print_chapter_footer)
wctx->writer->print_chapter_footer(wctx, footer);
wctx->nb_chapter++;
}
static inline void writer_print_section_header(WriterContext *wctx,
const char *header)
{
if (wctx->writer->print_section_header)
wctx->writer->print_section_header(wctx, header);
wctx->nb_item = 0;
}
static inline void writer_print_section_footer(WriterContext *wctx,
const char *footer)
{
if (wctx->writer->print_section_footer)
wctx->writer->print_section_footer(wctx, footer);
wctx->nb_section++;
}
static inline void writer_print_integer(WriterContext *wctx,
const char *key, long long int val)
{
wctx->writer->print_integer(wctx, key, val);
wctx->nb_item++;
}
static inline void writer_print_string(WriterContext *wctx,
const char *key, const char *val, int opt)
{
if (opt && !(wctx->writer->flags & WRITER_FLAG_DISPLAY_OPTIONAL_FIELDS))
return;
wctx->writer->print_string(wctx, key, val);
wctx->nb_item++;
}
static void writer_print_time(WriterContext *wctx, const char *key,
int64_t ts, const AVRational *time_base)
{
char buf[128];
if (ts == AV_NOPTS_VALUE) {
writer_print_string(wctx, key, "N/A", 1);
} else {
double d = ts * av_q2d(*time_base);
value_string(buf, sizeof(buf), (struct unit_value){.val.d=d, .unit=unit_second_str});
writer_print_string(wctx, key, buf, 0);
}
}
static void writer_print_ts(WriterContext *wctx, const char *key, int64_t ts)
{
if (ts == AV_NOPTS_VALUE) {
writer_print_string(wctx, key, "N/A", 1);
} else {
writer_print_integer(wctx, key, ts);
}
}
static inline void writer_show_tags(WriterContext *wctx, AVDictionary *dict)
{
wctx->writer->show_tags(wctx, dict);
}
#define MAX_REGISTERED_WRITERS_NB 64
static const Writer *registered_writers[MAX_REGISTERED_WRITERS_NB + 1];
static int writer_register(const Writer *writer)
{
static int next_registered_writer_idx = 0;
if (next_registered_writer_idx == MAX_REGISTERED_WRITERS_NB)
return AVERROR(ENOMEM);
registered_writers[next_registered_writer_idx++] = writer;
return 0;
}
static const Writer *writer_get_by_name(const char *name)
{
int i;
for (i = 0; registered_writers[i]; i++)
if (!strcmp(registered_writers[i]->name, name))
return registered_writers[i];
return NULL;
}
/* Print helpers */
struct print_buf {
char *s;
int len;
};
static char *fast_asprintf(struct print_buf *pbuf, const char *fmt, ...)
{
va_list va;
int len;
va_start(va, fmt);
len = vsnprintf(NULL, 0, fmt, va);
va_end(va);
if (len < 0)
goto fail;
if (pbuf->len < len) {
char *p = av_realloc(pbuf->s, len + 1);
if (!p)
goto fail;
pbuf->s = p;
pbuf->len = len;
}
va_start(va, fmt);
len = vsnprintf(pbuf->s, len + 1, fmt, va);
va_end(va);
if (len < 0)
goto fail;
return pbuf->s;
fail:
av_freep(&pbuf->s);
pbuf->len = 0;
return NULL;
}
#define ESCAPE_INIT_BUF_SIZE 256
#define ESCAPE_CHECK_SIZE(src, size, max_size) \
if (size > max_size) { \
char buf[64]; \
snprintf(buf, sizeof(buf), "%s", src); \
av_log(log_ctx, AV_LOG_WARNING, \
"String '%s...' with is too big\n", buf); \
return "FFPROBE_TOO_BIG_STRING"; \
}
#define ESCAPE_REALLOC_BUF(dst_size_p, dst_p, src, size) \
if (*dst_size_p < size) { \
char *q = av_realloc(*dst_p, size); \
if (!q) { \
char buf[64]; \
snprintf(buf, sizeof(buf), "%s", src); \
av_log(log_ctx, AV_LOG_WARNING, \
"String '%s...' could not be escaped\n", buf); \
return "FFPROBE_THIS_STRING_COULD_NOT_BE_ESCAPED"; \
} \
*dst_size_p = size; \
*dst = q; \
}
/* WRITERS */
/* Default output */
static void default_print_footer(WriterContext *wctx)
{
printf("\n");
}
static void default_print_chapter_header(WriterContext *wctx, const char *chapter)
{
if (wctx->nb_chapter)
printf("\n");
}
/* lame uppercasing routine, assumes the string is lower case ASCII */
static inline char *upcase_string(char *dst, size_t dst_size, const char *src)
{
int i;
for (i = 0; src[i] && i < dst_size-1; i++)
dst[i] = src[i]-32;
dst[i] = 0;
return dst;
}
static void default_print_section_header(WriterContext *wctx, const char *section)
{
char buf[32];
if (wctx->nb_section)
printf("\n");
printf("[%s]\n", upcase_string(buf, sizeof(buf), section));
}
static void default_print_section_footer(WriterContext *wctx, const char *section)
{
char buf[32];
printf("[/%s]", upcase_string(buf, sizeof(buf), section));
}
static void default_print_str(WriterContext *wctx, const char *key, const char *value)
{
printf("%s=%s\n", key, value);
}
static void default_print_int(WriterContext *wctx, const char *key, long long int value)
{
printf("%s=%lld\n", key, value);
}
static void default_show_tags(WriterContext *wctx, AVDictionary *dict)
{
AVDictionaryEntry *tag = NULL;
while ((tag = av_dict_get(dict, "", tag, AV_DICT_IGNORE_SUFFIX))) {
printf("TAG:");
writer_print_string(wctx, tag->key, tag->value, 0);
}
}
static const Writer default_writer = {
.name = "default",
.print_footer = default_print_footer,
.print_chapter_header = default_print_chapter_header,
.print_section_header = default_print_section_header,
.print_section_footer = default_print_section_footer,
.print_integer = default_print_int,
.print_string = default_print_str,
.show_tags = default_show_tags,
.flags = WRITER_FLAG_DISPLAY_OPTIONAL_FIELDS,
};
/* Compact output */
/**
* Escape \n, \r, \\ and sep characters contained in s, and print the
* resulting string.
*/
static const char *c_escape_str(char **dst, size_t *dst_size,
const char *src, const char sep, void *log_ctx)
{
const char *p;
char *q;
size_t size = 1;
/* precompute size */
for (p = src; *p; p++, size++) {
ESCAPE_CHECK_SIZE(src, size, SIZE_MAX-2);
if (*p == '\n' || *p == '\r' || *p == '\\')
size++;
}
ESCAPE_REALLOC_BUF(dst_size, dst, src, size);
q = *dst;
for (p = src; *p; p++) {
switch (*src) {
case '\n': *q++ = '\\'; *q++ = 'n'; break;
case '\r': *q++ = '\\'; *q++ = 'r'; break;
case '\\': *q++ = '\\'; *q++ = '\\'; break;
default:
if (*p == sep)
*q++ = '\\';
*q++ = *p;
}
}
*q = 0;
return *dst;
}
/**
* Quote fields containing special characters, check RFC4180.
*/
static const char *csv_escape_str(char **dst, size_t *dst_size,
const char *src, const char sep, void *log_ctx)
{
const char *p;
char *q;
size_t size = 1;
int quote = 0;
/* precompute size */
for (p = src; *p; p++, size++) {
ESCAPE_CHECK_SIZE(src, size, SIZE_MAX-4);
if (*p == '"' || *p == sep || *p == '\n' || *p == '\r')
if (!quote) {
quote = 1;
size += 2;
}
if (*p == '"')
size++;
}
ESCAPE_REALLOC_BUF(dst_size, dst, src, size);
q = *dst;
p = src;
if (quote)
*q++ = '\"';
while (*p) {
if (*p == '"')
*q++ = '\"';
*q++ = *p++;
}
if (quote)
*q++ = '\"';
*q = 0;
return *dst;
}
static const char *none_escape_str(char **dst, size_t *dst_size,
const char *src, const char sep, void *log_ctx)
{
return src;
}
typedef struct CompactContext {
const AVClass *class;
char *item_sep_str;
char item_sep;
int nokey;
char *buf;
size_t buf_size;
char *escape_mode_str;
const char * (*escape_str)(char **dst, size_t *dst_size,
const char *src, const char sep, void *log_ctx);
} CompactContext;
#define OFFSET(x) offsetof(CompactContext, x)
static const AVOption compact_options[]= {
{"item_sep", "set item separator", OFFSET(item_sep_str), AV_OPT_TYPE_STRING, {.str="|"}, CHAR_MIN, CHAR_MAX },
{"s", "set item separator", OFFSET(item_sep_str), AV_OPT_TYPE_STRING, {.str="|"}, CHAR_MIN, CHAR_MAX },
{"nokey", "force no key printing", OFFSET(nokey), AV_OPT_TYPE_INT, {.dbl=0}, 0, 1 },
{"nk", "force no key printing", OFFSET(nokey), AV_OPT_TYPE_INT, {.dbl=0}, 0, 1 },
{"escape", "set escape mode", OFFSET(escape_mode_str), AV_OPT_TYPE_STRING, {.str="c"}, CHAR_MIN, CHAR_MAX },
{"e", "set escape mode", OFFSET(escape_mode_str), AV_OPT_TYPE_STRING, {.str="c"}, CHAR_MIN, CHAR_MAX },
{NULL},
};
static const char *compact_get_name(void *ctx)
{
return "compact";
}
static const AVClass compact_class = {
"CompactContext",
compact_get_name,
compact_options
};
static av_cold int compact_init(WriterContext *wctx, const char *args, void *opaque)
{
CompactContext *compact = wctx->priv;
int err;
compact->class = &compact_class;
av_opt_set_defaults(compact);
if (args &&
(err = (av_set_options_string(compact, args, "=", ":"))) < 0) {
av_log(wctx, AV_LOG_ERROR, "Error parsing options string: '%s'\n", args);
return err;
}
if (strlen(compact->item_sep_str) != 1) {
av_log(wctx, AV_LOG_ERROR, "Item separator '%s' specified, but must contain a single character\n",
compact->item_sep_str);
return AVERROR(EINVAL);
}
compact->item_sep = compact->item_sep_str[0];
compact->buf_size = ESCAPE_INIT_BUF_SIZE;
if (!(compact->buf = av_malloc(compact->buf_size)))
return AVERROR(ENOMEM);
if (!strcmp(compact->escape_mode_str, "none")) compact->escape_str = none_escape_str;
else if (!strcmp(compact->escape_mode_str, "c" )) compact->escape_str = c_escape_str;
else if (!strcmp(compact->escape_mode_str, "csv" )) compact->escape_str = csv_escape_str;
else {
av_log(wctx, AV_LOG_ERROR, "Unknown escape mode '%s'\n", compact->escape_mode_str);
return AVERROR(EINVAL);
}
return 0;
}
static av_cold void compact_uninit(WriterContext *wctx)
{
CompactContext *compact = wctx->priv;
av_freep(&compact->item_sep_str);
av_freep(&compact->buf);
av_freep(&compact->escape_mode_str);
}
static void compact_print_section_header(WriterContext *wctx, const char *section)
{
CompactContext *compact = wctx->priv;
printf("%s%c", section, compact->item_sep);
}
static void compact_print_section_footer(WriterContext *wctx, const char *section)
{
printf("\n");
}
static void compact_print_str(WriterContext *wctx, const char *key, const char *value)
{
CompactContext *compact = wctx->priv;
if (wctx->nb_item) printf("%c", compact->item_sep);
if (!compact->nokey)
printf("%s=", key);
printf("%s", compact->escape_str(&compact->buf, &compact->buf_size,
value, compact->item_sep, wctx));
}
static void compact_print_int(WriterContext *wctx, const char *key, long long int value)
{
CompactContext *compact = wctx->priv;
if (wctx->nb_item) printf("%c", compact->item_sep);
if (!compact->nokey)
printf("%s=", key);
printf("%lld", value);
}
static void compact_show_tags(WriterContext *wctx, AVDictionary *dict)
{
CompactContext *compact = wctx->priv;
AVDictionaryEntry *tag = NULL;
while ((tag = av_dict_get(dict, "", tag, AV_DICT_IGNORE_SUFFIX))) {
if (wctx->nb_item) printf("%c", compact->item_sep);
if (!compact->nokey)
printf("tag:%s=", compact->escape_str(&compact->buf, &compact->buf_size,
tag->key, compact->item_sep, wctx));
printf("%s", compact->escape_str(&compact->buf, &compact->buf_size,
tag->value, compact->item_sep, wctx));
}
}
static const Writer compact_writer = {
.name = "compact",
.priv_size = sizeof(CompactContext),
.init = compact_init,
.uninit = compact_uninit,
.print_section_header = compact_print_section_header,
.print_section_footer = compact_print_section_footer,
.print_integer = compact_print_int,
.print_string = compact_print_str,
.show_tags = compact_show_tags,
.flags = WRITER_FLAG_DISPLAY_OPTIONAL_FIELDS,
};
/* CSV output */
static av_cold int csv_init(WriterContext *wctx, const char *args, void *opaque)
{
return compact_init(wctx, "item_sep=,:nokey=1:escape=csv", opaque);
}
static const Writer csv_writer = {
.name = "csv",
.priv_size = sizeof(CompactContext),
.init = csv_init,
.uninit = compact_uninit,
.print_section_header = compact_print_section_header,
.print_section_footer = compact_print_section_footer,
.print_integer = compact_print_int,
.print_string = compact_print_str,
.show_tags = compact_show_tags,
.flags = WRITER_FLAG_DISPLAY_OPTIONAL_FIELDS,
};
/* JSON output */
typedef struct {
int multiple_entries; ///< tells if the given chapter requires multiple entries
char *buf;
size_t buf_size;
} JSONContext;
static av_cold int json_init(WriterContext *wctx, const char *args, void *opaque)
{
JSONContext *json = wctx->priv;
json->buf_size = ESCAPE_INIT_BUF_SIZE;
if (!(json->buf = av_malloc(json->buf_size)))
return AVERROR(ENOMEM);
return 0;
}
static av_cold void json_uninit(WriterContext *wctx)
{
JSONContext *json = wctx->priv;
av_freep(&json->buf);
}
static const char *json_escape_str(char **dst, size_t *dst_size, const char *src,
void *log_ctx)
{
static const char json_escape[] = {'"', '\\', '\b', '\f', '\n', '\r', '\t', 0};
static const char json_subst[] = {'"', '\\', 'b', 'f', 'n', 'r', 't', 0};
const char *p;
char *q;
size_t size = 1;
// compute the length of the escaped string
for (p = src; *p; p++) {
ESCAPE_CHECK_SIZE(src, size, SIZE_MAX-6);
if (strchr(json_escape, *p)) size += 2; // simple escape
else if ((unsigned char)*p < 32) size += 6; // handle non-printable chars
else size += 1; // char copy
}
ESCAPE_REALLOC_BUF(dst_size, dst, src, size);
q = *dst;
for (p = src; *p; p++) {
char *s = strchr(json_escape, *p);
if (s) {
*q++ = '\\';
*q++ = json_subst[s - json_escape];
} else if ((unsigned char)*p < 32) {
snprintf(q, 7, "\\u00%02x", *p & 0xff);
q += 6;
} else {
*q++ = *p;
}
}
*q = 0;
return *dst;
}
static void json_print_header(WriterContext *wctx)
{
printf("{");
}
static void json_print_footer(WriterContext *wctx)
{
printf("\n}\n");
}
static void json_print_chapter_header(WriterContext *wctx, const char *chapter)
{
JSONContext *json = wctx->priv;
if (wctx->nb_chapter)
printf(",");
json->multiple_entries = !strcmp(chapter, "packets") || !strcmp(chapter, "streams");
printf("\n \"%s\":%s", json_escape_str(&json->buf, &json->buf_size, chapter, wctx),
json->multiple_entries ? " [" : " ");
}
static void json_print_chapter_footer(WriterContext *wctx, const char *chapter)
{
JSONContext *json = wctx->priv;
if (json->multiple_entries)
printf("]");
}
static void json_print_section_header(WriterContext *wctx, const char *section)
{
if (wctx->nb_section) printf(",");
printf("{\n");
}
static void json_print_section_footer(WriterContext *wctx, const char *section)
{
printf("\n }");
}
static inline void json_print_item_str(WriterContext *wctx,
const char *key, const char *value,
const char *indent)
{
JSONContext *json = wctx->priv;
printf("%s\"%s\":", indent, json_escape_str(&json->buf, &json->buf_size, key, wctx));
printf(" \"%s\"", json_escape_str(&json->buf, &json->buf_size, value, wctx));
}
#define INDENT " "
static void json_print_str(WriterContext *wctx, const char *key, const char *value)
{
if (wctx->nb_item) printf(",\n");
json_print_item_str(wctx, key, value, INDENT);
}
static void json_print_int(WriterContext *wctx, const char *key, long long int value)
{
JSONContext *json = wctx->priv;
if (wctx->nb_item) printf(",\n");
printf(INDENT "\"%s\": %lld",
json_escape_str(&json->buf, &json->buf_size, key, wctx), value);
}
static void json_show_tags(WriterContext *wctx, AVDictionary *dict)
{
AVDictionaryEntry *tag = NULL;
int is_first = 1;
if (!dict)
return;
printf(",\n" INDENT "\"tags\": {\n");
while ((tag = av_dict_get(dict, "", tag, AV_DICT_IGNORE_SUFFIX))) {
if (is_first) is_first = 0;
else printf(",\n");
json_print_item_str(wctx, tag->key, tag->value, INDENT INDENT);
}
printf("\n }");
}
static const Writer json_writer = {
.name = "json",
.priv_size = sizeof(JSONContext),
.init = json_init,
.uninit = json_uninit,
.print_header = json_print_header,
.print_footer = json_print_footer,
.print_chapter_header = json_print_chapter_header,
.print_chapter_footer = json_print_chapter_footer,
.print_section_header = json_print_section_header,
.print_section_footer = json_print_section_footer,
.print_integer = json_print_int,
.print_string = json_print_str,
.show_tags = json_show_tags,
};
/* XML output */
typedef struct {
const AVClass *class;
int within_tag;
int multiple_entries; ///< tells if the given chapter requires multiple entries
int indent_level;
int fully_qualified;
int xsd_strict;
char *buf;
size_t buf_size;
} XMLContext;
#undef OFFSET
#define OFFSET(x) offsetof(XMLContext, x)
static const AVOption xml_options[] = {
{"fully_qualified", "specify if the output should be fully qualified", OFFSET(fully_qualified), AV_OPT_TYPE_INT, {.dbl=0}, 0, 1 },
{"q", "specify if the output should be fully qualified", OFFSET(fully_qualified), AV_OPT_TYPE_INT, {.dbl=0}, 0, 1 },
{"xsd_strict", "ensure that the output is XSD compliant", OFFSET(xsd_strict), AV_OPT_TYPE_INT, {.dbl=0}, 0, 1 },
{"x", "ensure that the output is XSD compliant", OFFSET(xsd_strict), AV_OPT_TYPE_INT, {.dbl=0}, 0, 1 },
{NULL},
};
static const char *xml_get_name(void *ctx)
{
return "xml";
}
static const AVClass xml_class = {
"XMLContext",
xml_get_name,
xml_options
};
static av_cold int xml_init(WriterContext *wctx, const char *args, void *opaque)
{
XMLContext *xml = wctx->priv;
int err;
xml->class = &xml_class;
av_opt_set_defaults(xml);
if (args &&
(err = (av_set_options_string(xml, args, "=", ":"))) < 0) {
av_log(wctx, AV_LOG_ERROR, "Error parsing options string: '%s'\n", args);
return err;
}
if (xml->xsd_strict) {
xml->fully_qualified = 1;
#define CHECK_COMPLIANCE(opt, opt_name) \
if (opt) { \
av_log(wctx, AV_LOG_ERROR, \
"XSD-compliant output selected but option '%s' was selected, XML output may be non-compliant.\n" \
"You need to disable such option with '-no%s'\n", opt_name, opt_name); \
return AVERROR(EINVAL); \
}
CHECK_COMPLIANCE(show_private_data, "private");
CHECK_COMPLIANCE(show_value_unit, "unit");
CHECK_COMPLIANCE(use_value_prefix, "prefix");
}
xml->buf_size = ESCAPE_INIT_BUF_SIZE;
if (!(xml->buf = av_malloc(xml->buf_size)))
return AVERROR(ENOMEM);
return 0;
}
static av_cold void xml_uninit(WriterContext *wctx)
{
XMLContext *xml = wctx->priv;
av_freep(&xml->buf);
}
static const char *xml_escape_str(char **dst, size_t *dst_size, const char *src,
void *log_ctx)
{
const char *p;
char *q;
size_t size = 1;
/* precompute size */
for (p = src; *p; p++, size++) {
ESCAPE_CHECK_SIZE(src, size, SIZE_MAX-10);
switch (*p) {
case '&' : size += strlen("&amp;"); break;
case '<' : size += strlen("&lt;"); break;
case '>' : size += strlen("&gt;"); break;
case '\"': size += strlen("&quot;"); break;
case '\'': size += strlen("&apos;"); break;
default: size++;
}
}
ESCAPE_REALLOC_BUF(dst_size, dst, src, size);
#define COPY_STR(str) { \
const char *s = str; \
while (*s) \
*q++ = *s++; \
}
p = src;
q = *dst;
while (*p) {
switch (*p) {
case '&' : COPY_STR("&amp;"); break;
case '<' : COPY_STR("&lt;"); break;
case '>' : COPY_STR("&gt;"); break;
case '\"': COPY_STR("&quot;"); break;
case '\'': COPY_STR("&apos;"); break;
default: *q++ = *p;
}
p++;
}
*q = 0;
return *dst;
}
static void xml_print_header(WriterContext *wctx)
{
XMLContext *xml = wctx->priv;
const char *qual = " xmlns:xsi='http://www.w3.org/2001/XMLSchema-instance' "
"xmlns:ffprobe='http://www.ffmpeg.org/schema/ffprobe' "
"xsi:schemaLocation='http://www.ffmpeg.org/schema/ffprobe ffprobe.xsd'";
printf("<?xml version=\"1.0\" encoding=\"UTF-8\"?>\n");
printf("<%sffprobe%s>\n",
xml->fully_qualified ? "ffprobe:" : "",
xml->fully_qualified ? qual : "");
xml->indent_level++;
}
static void xml_print_footer(WriterContext *wctx)
{
XMLContext *xml = wctx->priv;
xml->indent_level--;
printf("</%sffprobe>\n", xml->fully_qualified ? "ffprobe:" : "");
}
#define XML_INDENT() { int i; for (i = 0; i < xml->indent_level; i++) printf(INDENT); }
static void xml_print_chapter_header(WriterContext *wctx, const char *chapter)
{
XMLContext *xml = wctx->priv;
if (wctx->nb_chapter)
printf("\n");
xml->multiple_entries = !strcmp(chapter, "packets") || !strcmp(chapter, "streams");
if (xml->multiple_entries) {
XML_INDENT(); printf("<%s>\n", chapter);
xml->indent_level++;
}
}
static void xml_print_chapter_footer(WriterContext *wctx, const char *chapter)
{
XMLContext *xml = wctx->priv;
if (xml->multiple_entries) {
xml->indent_level--;
XML_INDENT(); printf("</%s>\n", chapter);
}
}
static void xml_print_section_header(WriterContext *wctx, const char *section)
{
XMLContext *xml = wctx->priv;
XML_INDENT(); printf("<%s ", section);
xml->within_tag = 1;
}
static void xml_print_section_footer(WriterContext *wctx, const char *section)
{
XMLContext *xml = wctx->priv;
if (xml->within_tag)
printf("/>\n");
else {
XML_INDENT(); printf("</%s>\n", section);
}
}
static void xml_print_str(WriterContext *wctx, const char *key, const char *value)
{
XMLContext *xml = wctx->priv;
if (wctx->nb_item)
printf(" ");
printf("%s=\"%s\"", key, xml_escape_str(&xml->buf, &xml->buf_size, value, wctx));
}
static void xml_print_int(WriterContext *wctx, const char *key, long long int value)
{
if (wctx->nb_item)
printf(" ");
printf("%s=\"%lld\"", key, value);
}
static void xml_show_tags(WriterContext *wctx, AVDictionary *dict)
{
XMLContext *xml = wctx->priv;
AVDictionaryEntry *tag = NULL;
int is_first = 1;
xml->indent_level++;
while ((tag = av_dict_get(dict, "", tag, AV_DICT_IGNORE_SUFFIX))) {
if (is_first) {
/* close section tag */
printf(">\n");
xml->within_tag = 0;
is_first = 0;
}
XML_INDENT();
printf("<tag key=\"%s\"",
xml_escape_str(&xml->buf, &xml->buf_size, tag->key, wctx));
printf(" value=\"%s\"/>\n",
xml_escape_str(&xml->buf, &xml->buf_size, tag->value, wctx));
}
xml->indent_level--;
}
static Writer xml_writer = {
.name = "xml",
.priv_size = sizeof(XMLContext),
.init = xml_init,
.uninit = xml_uninit,
.print_header = xml_print_header,
.print_footer = xml_print_footer,
.print_chapter_header = xml_print_chapter_header,
.print_chapter_footer = xml_print_chapter_footer,
.print_section_header = xml_print_section_header,
.print_section_footer = xml_print_section_footer,
.print_integer = xml_print_int,
.print_string = xml_print_str,
.show_tags = xml_show_tags,
};
static void writer_register_all(void)
{
static int initialized;
if (initialized)
return;
initialized = 1;
writer_register(&default_writer);
writer_register(&compact_writer);
writer_register(&csv_writer);
writer_register(&json_writer);
writer_register(&xml_writer);
}
#define print_fmt(k, f, ...) do { \
if (fast_asprintf(&pbuf, f, __VA_ARGS__)) \
writer_print_string(w, k, pbuf.s, 0); \
} while (0)
#define print_fmt_opt(k, f, ...) do { \
if (fast_asprintf(&pbuf, f, __VA_ARGS__)) \
writer_print_string(w, k, pbuf.s, 1); \
} while (0)
#define print_int(k, v) writer_print_integer(w, k, v)
#define print_str(k, v) writer_print_string(w, k, v, 0)
#define print_str_opt(k, v) writer_print_string(w, k, v, 1)
#define print_time(k, v, tb) writer_print_time(w, k, v, tb)
#define print_ts(k, v) writer_print_ts(w, k, v)
#define print_val(k, v, u) writer_print_string(w, k, \
value_string(val_str, sizeof(val_str), (struct unit_value){.val.i = v, .unit=u}), 0)
#define print_section_header(s) writer_print_section_header(w, s)
#define print_section_footer(s) writer_print_section_footer(w, s)
#define show_tags(metadata) writer_show_tags(w, metadata)
static void show_packet(WriterContext *w, AVFormatContext *fmt_ctx, AVPacket *pkt, int packet_idx)
{
char val_str[128];
AVStream *st = fmt_ctx->streams[pkt->stream_index];
struct print_buf pbuf = {.s = NULL};
const char *s;
print_section_header("packet");
s = av_get_media_type_string(st->codec->codec_type);
if (s) print_str ("codec_type", s);
else print_str_opt("codec_type", "unknown");
print_int("stream_index", pkt->stream_index);
print_ts ("pts", pkt->pts);
print_time("pts_time", pkt->pts, &st->time_base);
print_ts ("dts", pkt->dts);
print_time("dts_time", pkt->dts, &st->time_base);
print_ts ("duration", pkt->duration);
print_time("duration_time", pkt->duration, &st->time_base);
print_val("size", pkt->size, unit_byte_str);
if (pkt->pos != -1) print_fmt ("pos", "%"PRId64, pkt->pos);
else print_str_opt("pos", "N/A");
print_fmt("flags", "%c", pkt->flags & AV_PKT_FLAG_KEY ? 'K' : '_');
print_section_footer("packet");
av_free(pbuf.s);
fflush(stdout);
}
static void show_packets(WriterContext *w, AVFormatContext *fmt_ctx)
{
AVPacket pkt;
int i = 0;
av_init_packet(&pkt);
while (!av_read_frame(fmt_ctx, &pkt))
show_packet(w, fmt_ctx, &pkt, i++);
}
static void show_stream(WriterContext *w, AVFormatContext *fmt_ctx, int stream_idx)
{
AVStream *stream = fmt_ctx->streams[stream_idx];
AVCodecContext *dec_ctx;
AVCodec *dec;
char val_str[128];
const char *s;
AVRational display_aspect_ratio;
struct print_buf pbuf = {.s = NULL};
print_section_header("stream");
print_int("index", stream->index);
if ((dec_ctx = stream->codec)) {
if ((dec = dec_ctx->codec)) {
print_str("codec_name", dec->name);
print_str("codec_long_name", dec->long_name);
} else {
print_str_opt("codec_name", "unknown");
print_str_opt("codec_long_name", "unknown");
}
s = av_get_media_type_string(dec_ctx->codec_type);
if (s) print_str ("codec_type", s);
else print_str_opt("codec_type", "unknown");
print_fmt("codec_time_base", "%d/%d", dec_ctx->time_base.num, dec_ctx->time_base.den);
/* print AVI/FourCC tag */
av_get_codec_tag_string(val_str, sizeof(val_str), dec_ctx->codec_tag);
print_str("codec_tag_string", val_str);
print_fmt("codec_tag", "0x%04x", dec_ctx->codec_tag);
switch (dec_ctx->codec_type) {
case AVMEDIA_TYPE_VIDEO:
print_int("width", dec_ctx->width);
print_int("height", dec_ctx->height);
print_int("has_b_frames", dec_ctx->has_b_frames);
if (dec_ctx->sample_aspect_ratio.num) {
print_fmt("sample_aspect_ratio", "%d:%d",
dec_ctx->sample_aspect_ratio.num,
dec_ctx->sample_aspect_ratio.den);
av_reduce(&display_aspect_ratio.num, &display_aspect_ratio.den,
dec_ctx->width * dec_ctx->sample_aspect_ratio.num,
dec_ctx->height * dec_ctx->sample_aspect_ratio.den,
1024*1024);
print_fmt("display_aspect_ratio", "%d:%d",
display_aspect_ratio.num,
display_aspect_ratio.den);
} else {
print_str_opt("sample_aspect_ratio", "N/A");
print_str_opt("display_aspect_ratio", "N/A");
}
s = av_get_pix_fmt_name(dec_ctx->pix_fmt);
if (s) print_str ("pix_fmt", s);
else print_str_opt("pix_fmt", "unknown");
print_int("level", dec_ctx->level);
if (dec_ctx->timecode_frame_start >= 0) {
uint32_t tc = dec_ctx->timecode_frame_start;
print_fmt("timecode", "%02d:%02d:%02d%c%02d",
tc>>19 & 0x1f, // hours
tc>>13 & 0x3f, // minutes
tc>>6 & 0x3f, // seconds
tc & 1<<24 ? ';' : ':', // drop
tc & 0x3f); // frames
} else {
print_str_opt("timecode", "N/A");
}
break;
case AVMEDIA_TYPE_AUDIO:
s = av_get_sample_fmt_name(dec_ctx->sample_fmt);
if (s) print_str ("sample_fmt", s);
else print_str_opt("sample_fmt", "unknown");
print_val("sample_rate", dec_ctx->sample_rate, unit_hertz_str);
print_int("channels", dec_ctx->channels);
print_int("bits_per_sample", av_get_bits_per_sample(dec_ctx->codec_id));
break;
}
} else {
print_str_opt("codec_type", "unknown");
}
if (dec_ctx->codec && dec_ctx->codec->priv_class && show_private_data) {
const AVOption *opt = NULL;
while (opt = av_opt_next(dec_ctx->priv_data,opt)) {
uint8_t *str;
if (opt->flags) continue;
if (av_opt_get(dec_ctx->priv_data, opt->name, 0, &str) >= 0) {
print_str(opt->name, str);
av_free(str);
}
}
}
if (fmt_ctx->iformat->flags & AVFMT_SHOW_IDS) print_fmt ("id", "0x%x", stream->id);
else print_str_opt("id", "N/A");
print_fmt("r_frame_rate", "%d/%d", stream->r_frame_rate.num, stream->r_frame_rate.den);
print_fmt("avg_frame_rate", "%d/%d", stream->avg_frame_rate.num, stream->avg_frame_rate.den);
print_fmt("time_base", "%d/%d", stream->time_base.num, stream->time_base.den);
print_time("start_time", stream->start_time, &stream->time_base);
print_time("duration", stream->duration, &stream->time_base);
if (stream->nb_frames) print_fmt ("nb_frames", "%"PRId64, stream->nb_frames);
else print_str_opt("nb_frames", "N/A");
show_tags(stream->metadata);
print_section_footer("stream");
av_free(pbuf.s);
fflush(stdout);
}
static void show_streams(WriterContext *w, AVFormatContext *fmt_ctx)
{
int i;
for (i = 0; i < fmt_ctx->nb_streams; i++)
show_stream(w, fmt_ctx, i);
}
static void show_format(WriterContext *w, AVFormatContext *fmt_ctx)
{
char val_str[128];
int64_t size = avio_size(fmt_ctx->pb);
print_section_header("format");
print_str("filename", fmt_ctx->filename);
print_int("nb_streams", fmt_ctx->nb_streams);
print_str("format_name", fmt_ctx->iformat->name);
print_str("format_long_name", fmt_ctx->iformat->long_name);
print_time("start_time", fmt_ctx->start_time, &AV_TIME_BASE_Q);
print_time("duration", fmt_ctx->duration, &AV_TIME_BASE_Q);
if (size >= 0) print_val ("size", size, unit_byte_str);
else print_str_opt("size", "N/A");
if (fmt_ctx->bit_rate > 0) print_val ("bit_rate", fmt_ctx->bit_rate, unit_bit_per_second_str);
else print_str_opt("bit_rate", "N/A");
show_tags(fmt_ctx->metadata);
print_section_footer("format");
fflush(stdout);
}
static void show_error(WriterContext *w, int err)
{
char errbuf[128];
const char *errbuf_ptr = errbuf;
if (av_strerror(err, errbuf, sizeof(errbuf)) < 0)
errbuf_ptr = strerror(AVUNERROR(err));
writer_print_chapter_header(w, "error");
print_section_header("error");
print_int("code", err);
print_str("string", errbuf_ptr);
print_section_footer("error");
writer_print_chapter_footer(w, "error");
}
static int open_input_file(AVFormatContext **fmt_ctx_ptr, const char *filename)
{
int err, i;
AVFormatContext *fmt_ctx = NULL;
AVDictionaryEntry *t;
if ((err = avformat_open_input(&fmt_ctx, filename, iformat, &format_opts)) < 0) {
print_error(filename, err);
return err;
}
if ((t = av_dict_get(format_opts, "", NULL, AV_DICT_IGNORE_SUFFIX))) {
av_log(NULL, AV_LOG_ERROR, "Option %s not found.\n", t->key);
return AVERROR_OPTION_NOT_FOUND;
}
/* fill the streams in the format context */
if ((err = avformat_find_stream_info(fmt_ctx, NULL)) < 0) {
print_error(filename, err);
return err;
}
av_dump_format(fmt_ctx, 0, filename, 0);
/* bind a decoder to each input stream */
for (i = 0; i < fmt_ctx->nb_streams; i++) {
AVStream *stream = fmt_ctx->streams[i];
AVCodec *codec;
if (!(codec = avcodec_find_decoder(stream->codec->codec_id))) {
av_log(NULL, AV_LOG_ERROR, "Unsupported codec with id %d for input stream %d\n",
stream->codec->codec_id, stream->index);
} else if (avcodec_open2(stream->codec, codec, NULL) < 0) {
av_log(NULL, AV_LOG_ERROR, "Error while opening codec for input stream %d\n",
stream->index);
}
}
*fmt_ctx_ptr = fmt_ctx;
return 0;
}
#define PRINT_CHAPTER(name) do { \
if (do_show_ ## name) { \
writer_print_chapter_header(wctx, #name); \
show_ ## name (wctx, fmt_ctx); \
writer_print_chapter_footer(wctx, #name); \
} \
} while (0)
static int probe_file(const char *filename)
{
AVFormatContext *fmt_ctx;
int ret;
const Writer *w;
char *buf;
char *w_name = NULL, *w_args = NULL;
WriterContext *wctx;
writer_register_all();
if (!print_format)
print_format = av_strdup("default");
w_name = av_strtok(print_format, "=", &buf);
w_args = buf;
w = writer_get_by_name(w_name);
if (!w) {
av_log(NULL, AV_LOG_ERROR, "Unknown output format with name '%s'\n", w_name);
ret = AVERROR(EINVAL);
goto end;
}
if ((ret = writer_open(&wctx, w, w_args, NULL)) < 0)
goto end;
writer_print_header(wctx);
ret = open_input_file(&fmt_ctx, filename);
if (ret >= 0) {
PRINT_CHAPTER(packets);
PRINT_CHAPTER(streams);
PRINT_CHAPTER(format);
avformat_close_input(&fmt_ctx);
} else if (do_show_error) {
show_error(wctx, ret);
}
writer_print_footer(wctx);
writer_close(&wctx);
end:
av_freep(&print_format);
return ret;
}
static void show_usage(void)
{
printf("Simple multimedia streams analyzer\n");
printf("usage: %s [OPTIONS] [INPUT_FILE]\n", program_name);
printf("\n");
}
static int opt_format(const char *opt, const char *arg)
{
iformat = av_find_input_format(arg);
if (!iformat) {
av_log(NULL, AV_LOG_ERROR, "Unknown input format: %s\n", arg);
return AVERROR(EINVAL);
}
return 0;
}
static void opt_input_file(void *optctx, const char *arg)
{
if (input_filename) {
av_log(NULL, AV_LOG_ERROR, "Argument '%s' provided as input filename, but '%s' was already specified.\n",
arg, input_filename);
exit(1);
}
if (!strcmp(arg, "-"))
arg = "pipe:";
input_filename = arg;
}
static int opt_help(const char *opt, const char *arg)
{
av_log_set_callback(log_callback_help);
show_usage();
show_help_options(options, "Main options:\n", 0, 0);
printf("\n");
show_help_children(avformat_get_class(), AV_OPT_FLAG_DECODING_PARAM);
return 0;
}
static int opt_pretty(const char *opt, const char *arg)
{
show_value_unit = 1;
use_value_prefix = 1;
use_byte_value_binary_prefix = 1;
use_value_sexagesimal_format = 1;
return 0;
}
static const OptionDef options[] = {
#include "cmdutils_common_opts.h"
{ "f", HAS_ARG, {(void*)opt_format}, "force format", "format" },
{ "unit", OPT_BOOL, {(void*)&show_value_unit}, "show unit of the displayed values" },
{ "prefix", OPT_BOOL, {(void*)&use_value_prefix}, "use SI prefixes for the displayed values" },
{ "byte_binary_prefix", OPT_BOOL, {(void*)&use_byte_value_binary_prefix},
"use binary prefixes for byte units" },
{ "sexagesimal", OPT_BOOL, {(void*)&use_value_sexagesimal_format},
"use sexagesimal format HOURS:MM:SS.MICROSECONDS for time units" },
{ "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" },
{ "show_error", OPT_BOOL, {(void*)&do_show_error} , "show probing error" },
{ "show_format", OPT_BOOL, {(void*)&do_show_format} , "show format/container info" },
{ "show_packets", OPT_BOOL, {(void*)&do_show_packets}, "show packets info" },
{ "show_streams", OPT_BOOL, {(void*)&do_show_streams}, "show streams info" },
{ "show_private_data", OPT_BOOL, {(void*)&show_private_data}, "show private data" },
{ "private", OPT_BOOL, {(void*)&show_private_data}, "same as show_private_data" },
{ "default", HAS_ARG | OPT_AUDIO | OPT_VIDEO | OPT_EXPERT, {(void*)opt_default}, "generic catch all option", "" },
{ "i", HAS_ARG, {(void *)opt_input_file}, "read specified file", "input_file"},
{ NULL, },
};
int main(int argc, char **argv)
{
int ret;
parse_loglevel(argc, argv, options);
av_register_all();
avformat_network_init();
init_opts();
#if CONFIG_AVDEVICE
avdevice_register_all();
#endif
show_banner(argc, argv, options);
parse_options(NULL, argc, argv, options, opt_input_file);
if (!input_filename) {
show_usage();
av_log(NULL, AV_LOG_ERROR, "You have to specify one input file.\n");
av_log(NULL, AV_LOG_ERROR, "Use -h to get full help or, even better, run 'man %s'.\n", program_name);
exit(1);
}
ret = probe_file(input_filename);
avformat_network_deinit();
return ret;
}