Add FFprobe tool.

This is a simplified / cleaned-up version of the SourceForge program:
http://sourceforge.net/projects/ffprobe/

Syntax / features may be different, in particular the options
-show_packets and -show_frames are not yet supported in this version.

Originally committed as revision 21936 to svn://svn.ffmpeg.org/ffmpeg/trunk

5 files changed, 455 insertions, 2 deletions

diff --git a/Changelog b/Changelog
index 0e561d5c2a..934549e596 100644
--- a/Changelog
+++ b/Changelog
@@ -58,6 +58,7 @@ version <next>:
 - Indeo 5 decoder
 - RTP depacketization of AMR
 - WMAVoice decoder
+- FFprobe tool
 
 
 
diff --git a/Makefile b/Makefile
index 49033816ab..0dc6d4d426 100644
--- a/Makefile
+++ b/Makefile
@@ -6,6 +6,7 @@ vpath %.texi $(SRC_PATH_BARE)
 
 PROGS-$(CONFIG_FFMPEG)   += ffmpeg
 PROGS-$(CONFIG_FFPLAY)   += ffplay
+PROGS-$(CONFIG_FFPROBE)  += ffprobe
 PROGS-$(CONFIG_FFSERVER) += ffserver
 
 PROGS      := $(addsuffix   $(EXESUF), $(PROGS-yes))
@@ -15,7 +16,7 @@ MANPAGES    = $(addprefix doc/, $(addsuffix .1, $(PROGS-yes)))
 TOOLS       = $(addprefix tools/, $(addsuffix $(EXESUF), cws2fws pktdumper probetest qt-faststart trasher))
 HOSTPROGS   = $(addprefix tests/, audiogen videogen rotozoom tiny_psnr)
 
-BASENAMES   = ffmpeg ffplay ffserver
+BASENAMES   = ffmpeg ffplay ffprobe ffserver
 ALLPROGS    = $(addsuffix   $(EXESUF), $(BASENAMES))
 ALLPROGS_G  = $(addsuffix _g$(EXESUF), $(BASENAMES))
 ALLMANPAGES = $(addsuffix .1, $(BASENAMES))
@@ -87,7 +88,7 @@ cmdutils.o cmdutils.d: version.h
 alltools: $(TOOLS)
 
 documentation: $(addprefix doc/, developer.html faq.html ffmpeg-doc.html \
-                                 ffplay-doc.html ffserver-doc.html       \
+                                 ffplay-doc.html ffprobe-doc.html ffserver-doc.html \
                                  general.html libavfilter.html $(ALLMANPAGES))
 
 doc/%.html: doc/%.texi
diff --git a/configure b/configure
index 7d4c612c46..5f639331f3 100755
--- a/configure
+++ b/configure
@@ -82,6 +82,7 @@ Configuration options:
   --disable-doc            do not build documentation
   --disable-ffmpeg         disable ffmpeg build
   --disable-ffplay         disable ffplay build
+  --disable-ffprobe        disable ffprobe build
   --disable-ffserver       disable ffserver build
   --disable-avdevice       disable libavdevice build
   --disable-avcodec        disable libavcodec build
@@ -890,6 +891,7 @@ CONFIG_LIST="
     fastdiv
     ffmpeg
     ffplay
+    ffprobe
     ffserver
     fft
     golomb
@@ -1398,6 +1400,7 @@ avformat_deps="avcodec"
 ffmpeg_deps="avcodec avformat swscale"
 ffplay_deps="avcodec avformat swscale sdl"
 ffplay_select="rdft"
+ffprobe_deps="avcodec avformat"
 ffserver_deps="avformat ffm_muxer rtp_protocol rtsp_demuxer"
 ffserver_extralibs='$ldl'
 
@@ -1449,6 +1452,7 @@ enable doc
 enable fastdiv
 enable ffmpeg
 enable ffplay
+enable ffprobe
 enable ffserver
 enable mpegaudio_hp
 enable network
diff --git a/doc/ffprobe-doc.texi b/doc/ffprobe-doc.texi
new file mode 100644
index 0000000000..d656de8fc4
--- /dev/null
+++ b/doc/ffprobe-doc.texi
@@ -0,0 +1,114 @@
+\input texinfo @c -*- texinfo -*-
+
+@settitle FFprobe Documentation
+@titlepage
+@sp 7
+@center @titlefont{FFprobe Documentation}
+@sp 3
+@end titlepage
+
+@chapter Introduction
+
+@c man begin DESCRIPTION
+
+FFprobe gathers information from multimedia streams and prints it in
+human- and machine-readable fashion.
+
+For example it can be used to check the format of the container used
+by a multimedia stream and the format and type of each media stream
+contained in it.
+
+If a filename is specified in input, ffprobe will try to open and
+probe the file content. If the file cannot be opened or recognized as
+a multimedia file, a positive exit code is returned.
+
+FFprobe may be employed both as a standalone application or in
+combination with a textual filter, which may perform more
+sophisticated processing, e.g. statistical processing or plotting.
+
+Options are used to list some of the formats supported by ffprobe or
+for specifying which information to display, and for setting how
+ffprobe will show it.
+
+FFprobe output is designed to be easily parsable by a textual filter,
+and consists of one or more sections of the form:
+@example
+[SECTION]
+key1=val1
+...
+keyN=valN
+[/SECTION]
+@end example
+
+Metadata tags stored in the container or in the streams are recognized
+and printed in the corresponding ``FORMAT'' or ``STREAM'' section, and
+are prefixed by the string ``TAG:''.
+
+@c man end
+
+@chapter Invocation
+
+@section Syntax
+
+The generic syntax is:
+
+@example
+@c man begin SYNOPSIS
+ffprobe [options] [@file{input_file}]
+@c man end
+@end example
+
+@c man begin OPTIONS
+
+@include fftools-common-opts.texi
+
+@section Main options
+
+@table @option
+@item -unit
+Show the unit of the displayed values.
+
+@item -prefix
+Show a SI prefixes of the displayed values.
+Unless ``-byte_binary_prefix'' option is used all the prefix
+are decimal.
+
+@item -byte_binary_prefix
+Force the use of binary prefixes for byte values.
+
+@item -sexagesimal
+Use sexagesimal format HH:MM:SS.MICROSECONDS for time values.
+
+@item -pretty
+Prettify the format of the displayed values, it corresponds to the
+options ``-unit -prefix -byte_binary_prefix -sexagesimal''.
+
+@item -show_format
+Show information about the container format of the input multimedia
+stream.
+
+All the container format information is printed within a section with
+name ``FORMAT''.
+
+@item -show_streams
+Show information about each media stream contained in the input
+multimedia stream.
+
+Each media stream information is printed within a dedicated section
+with name ``STREAM''.
+
+@end table
+@c man end
+
+@ignore
+
+@setfilename ffprobe
+@settitle FFprobe media prober
+
+@c man begin SEEALSO
+ffmpeg(1), ffplay(1), ffserver(1)
+@c man end
+
+@end ignore
+
+@bye
diff --git a/ffprobe.c b/ffprobe.c
new file mode 100644
index 0000000000..47dad44ec5
--- /dev/null
+++ b/ffprobe.c
@@ -0,0 +1,333 @@
+/*
+ * FFprobe : Simple Media Prober based on the FFmpeg libraries
+ * 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
+ */
+
+#undef HAVE_AV_CONFIG_H
+#include "libavformat/avformat.h"
+#include "libavcodec/avcodec.h"
+#include "libavcodec/opt.h"
+#include "libavutil/pixdesc.h"
+#include "cmdutils.h"
+
+const char program_name[] = "FFprobe";
+const int program_birth_year = 2007;
+
+static int do_show_format  = 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;
+
+/* globals */
+static const OptionDef options[];
+
+/* FFprobe context */
+static const char *input_filename;
+
+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";
+
+static char *value_string(char *buf, int buf_size, double val, const char *unit)
+{
+    if (unit == unit_second_str && use_value_sexagesimal_format) {
+        double secs;
+        int hours, mins;
+        secs  = val;
+        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;
+
+        if (unit == unit_byte_str && use_byte_value_binary_prefix) {
+            index = (int) (log2(val)) / 10;
+            index = av_clip(index, 0, FF_ARRAY_ELEMS(binary_unit_prefixes) -1);
+            val /= pow(2, index*10);
+            prefix_string = binary_unit_prefixes[index];
+        } else {
+            index = (int) (log10(val)) / 3;
+            index = av_clip(index, 0, FF_ARRAY_ELEMS(decimal_unit_prefixes) -1);
+            val /= pow(10, index*3);
+            prefix_string = decimal_unit_prefixes[index];
+        }
+
+        snprintf(buf, buf_size, "%.3f %s%s", val, prefix_string, show_value_unit ? unit : "");
+    } else {
+        snprintf(buf, buf_size, "%f %s", val, show_value_unit ? unit : "");
+    }
+
+    return buf;
+}
+
+static char *time_value_string(char *buf, int buf_size, int64_t val, const AVRational *time_base)
+{
+    if (val == AV_NOPTS_VALUE) {
+        snprintf(buf, buf_size, "N/A");
+    } else {
+        value_string(buf, buf_size, val * av_q2d(*time_base), unit_second_str);
+    }
+
+    return buf;
+}
+
+static const char *codec_type_string(enum CodecType codec_type)
+{
+    switch (codec_type) {
+    case CODEC_TYPE_VIDEO:        return "video";
+    case CODEC_TYPE_AUDIO:        return "audio";
+    case CODEC_TYPE_DATA:         return "data";
+    case CODEC_TYPE_SUBTITLE:     return "subtitle";
+    case CODEC_TYPE_ATTACHMENT:   return "attachment";
+    default:                      return "unknown";
+    }
+}
+
+static void show_stream(AVFormatContext *fmt_ctx, int stream_idx)
+{
+    AVStream *stream = fmt_ctx->streams[stream_idx];
+    AVCodecContext *dec_ctx;
+    AVCodec *dec;
+    char val_str[128];
+    AVMetadataTag *tag;
+    char a, b, c, d;
+
+    printf("[STREAM]\n");
+
+    printf("index=%d\n",        stream->index);
+
+    if ((dec_ctx = stream->codec)) {
+        if ((dec = dec_ctx->codec)) {
+            printf("codec_name=%s\n",         dec->name);
+            printf("codec_long_name=%s\n",    dec->long_name);
+        } else {
+            printf("codec_name=unknown\n");
+        }
+
+        printf("codec_type=%s\n",         codec_type_string(dec_ctx->codec_type));
+        printf("codec_time_base=%d/%d\n", dec_ctx->time_base.num, dec_ctx->time_base.den);
+
+        /* print AVI/FourCC tag */
+        a = dec_ctx->codec_tag     & 0xff;
+        b = dec_ctx->codec_tag>>8  & 0xff;
+        c = dec_ctx->codec_tag>>16 & 0xff;
+        d = dec_ctx->codec_tag>>24 & 0xff;
+        printf("codec_tag_string=");
+        if (isprint(a)) printf("%c", a); else printf("[%d]", a);
+        if (isprint(b)) printf("%c", b); else printf("[%d]", b);
+        if (isprint(c)) printf("%c", c); else printf("[%d]", c);
+        if (isprint(d)) printf("%c", d); else printf("[%d]", d);
+        printf("\ncodec_tag=0x%04x\n", dec_ctx->codec_tag);
+
+        switch (dec_ctx->codec_type) {
+        case CODEC_TYPE_VIDEO:
+            printf("width=%d\n",                   dec_ctx->width);
+            printf("height=%d\n",                  dec_ctx->height);
+            printf("has_b_frames=%d\n",            dec_ctx->has_b_frames);
+            printf("sample_aspect_ratio=%d:%d\n",  dec_ctx->sample_aspect_ratio.num,
+                                                   dec_ctx->sample_aspect_ratio.den);
+            printf("display_aspect_ratio=%d:%d\n", dec_ctx->sample_aspect_ratio.num,
+                                                   dec_ctx->sample_aspect_ratio.den);
+            printf("pix_fmt=%s\n",                 dec_ctx->pix_fmt != PIX_FMT_NONE ?
+                   av_pix_fmt_descriptors[dec_ctx->pix_fmt].name : "unknown");
+            break;
+
+        case CODEC_TYPE_AUDIO:
+            printf("sample_rate=%s\n",             value_string(val_str, sizeof(val_str),
+                                                                dec_ctx->sample_rate,
+                                                                unit_hertz_str));
+            printf("channels=%d\n",                dec_ctx->channels);
+            printf("bits_per_sample=%d\n",         av_get_bits_per_sample(dec_ctx->codec_id));
+            break;
+        }
+    } else {
+        printf("codec_type=unknown\n");
+    }
+
+    if (fmt_ctx->iformat->flags & AVFMT_SHOW_IDS)
+        printf("id=0x%x\n", stream->id);
+    printf("r_frame_rate=%d/%d\n",         stream->r_frame_rate.num,   stream->r_frame_rate.den);
+    printf("avg_frame_rate=%d/%d\n",       stream->avg_frame_rate.num, stream->avg_frame_rate.den);
+    printf("time_base=%d/%d\n",            stream->time_base.num,      stream->time_base.den);
+    if (stream->language[0])
+        printf("language=%s\n",            stream->language);
+    printf("start_time=%s\n",   time_value_string(val_str, sizeof(val_str), stream->start_time,
+                                                  &stream->time_base));
+    printf("duration=%s\n",     time_value_string(val_str, sizeof(val_str), stream->duration,
+                                                  &stream->time_base));
+
+    while ((tag = av_metadata_get(stream->metadata, "", tag, AV_METADATA_IGNORE_SUFFIX)))
+        printf("%s=%s\n", tag->key, tag->value);
+
+    printf("[/STREAM]\n");
+}
+
+static void show_format(AVFormatContext *fmt_ctx)
+{
+    AVMetadataTag *tag = NULL;
+    char val_str[128];
+
+    printf("[FORMAT]\n");
+
+    printf("filename=%s\n",         fmt_ctx->filename);
+    printf("nb_streams=%d\n",       fmt_ctx->nb_streams);
+    printf("format_name=%s\n",      fmt_ctx->iformat->name);
+    printf("format_long_name=%s\n", fmt_ctx->iformat->long_name);
+    printf("start_time=%s\n",       time_value_string(val_str, sizeof(val_str), fmt_ctx->start_time,
+                                                      &AV_TIME_BASE_Q));
+    printf("duration=%s\n",         time_value_string(val_str, sizeof(val_str), fmt_ctx->duration,
+                                                      &AV_TIME_BASE_Q));
+    printf("size=%s\n",             value_string(val_str, sizeof(val_str), fmt_ctx->file_size,
+                                                 unit_byte_str));
+    printf("bit_rate=%s\n",         value_string(val_str, sizeof(val_str), fmt_ctx->bit_rate,
+                                                 unit_bit_per_second_str));
+
+    while ((tag = av_metadata_get(fmt_ctx->metadata, "", tag, AV_METADATA_IGNORE_SUFFIX)))
+        printf("TAG:%s=%s\n", tag->key, tag->value);
+
+    printf("[/FORMAT]\n");
+}
+
+static int open_input_file(AVFormatContext **fmt_ctx_ptr, const char *filename)
+{
+    int err, i;
+    AVFormatContext *fmt_ctx;
+
+    fmt_ctx = avformat_alloc_context();
+
+    if ((err = av_open_input_file(&fmt_ctx, filename, NULL, 0, NULL)) < 0) {
+        print_error(filename, err);
+        return err;
+    }
+
+    /* fill the streams in the format context */
+    if ((err = av_find_stream_info(fmt_ctx)) < 0) {
+        print_error(filename, err);
+        return err;
+    }
+
+    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))) {
+            fprintf(stderr, "Unsupported codec (id=%d) for input stream %d\n",
+                    stream->codec->codec_id, stream->index);
+        } else if (avcodec_open(stream->codec, codec) < 0) {
+            fprintf(stderr, "Error while opening codec for input stream %d\n",
+                    stream->index);
+        }
+    }
+
+    *fmt_ctx_ptr = fmt_ctx;
+    return 0;
+}
+
+static int probe_file(const char *filename)
+{
+    AVFormatContext *fmt_ctx;
+    int ret, i;
+
+    if ((ret = open_input_file(&fmt_ctx, filename)))
+        return ret;
+
+    if (do_show_streams)
+        for (i = 0; i < fmt_ctx->nb_streams; i++)
+            show_stream(fmt_ctx, i);
+
+    if (do_show_format)
+        show_format(fmt_ctx);
+
+    av_close_input_file(fmt_ctx);
+    return 0;
+}
+
+static void show_usage(void)
+{
+    printf("Simple multimedia streams analyzer\n");
+    printf("usage: ffprobe [OPTIONS] [INPUT_FILE]\n");
+    printf("\n");
+}
+
+static void opt_input_file(const char *filename)
+{
+    if (!strcmp(filename, "-"))
+        filename = "pipe:";
+    input_filename = filename;
+}
+
+static void show_help(void)
+{
+    show_usage();
+    show_help_options(options, "Main options:\n", 0, 0);
+    printf("\n");
+}
+
+static void opt_pretty(void)
+{
+    show_value_unit              = 1;
+    use_value_prefix             = 1;
+    use_byte_value_binary_prefix = 1;
+    use_value_sexagesimal_format = 1;
+}
+
+static const OptionDef options[] = {
+#include "cmdutils_common_opts.h"
+    { "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" },
+    { "show_format",  OPT_BOOL, {(void*)&do_show_format} , "show format/container info" },
+    { "show_streams", OPT_BOOL, {(void*)&do_show_streams}, "show streams info"          },
+    { NULL, },
+};
+
+int main(int argc, char **argv)
+{
+    av_register_all();
+
+    show_banner();
+    parse_options(argc, argv, options, opt_input_file);
+
+    if (!input_filename) {
+        show_usage();
+        fprintf(stderr, "You have to specify one input file.\n");
+        fprintf(stderr, "Use -h to get full help or, even better, run 'man ffprobe'.\n");
+        exit(1);
+    }
+
+    return probe_file(input_filename);
+}