ffprobe.c

            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) {
        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);
    struct print_buf pbuf = {.s = NULL};

    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");
    av_free(pbuf.s);
    fflush(stdout);
}

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))) {
            fprintf(stderr, "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) {
            fprintf(stderr, "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;
    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;
    if ((ret = open_input_file(&fmt_ctx, filename)))
        goto end;

    writer_print_header(wctx);
    PRINT_CHAPTER(packets);
    PRINT_CHAPTER(streams);
    PRINT_CHAPTER(format);
    writer_print_footer(wctx);

    av_close_input_file(fmt_ctx);
    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) {
        fprintf(stderr, "Unknown input format: %s\n", arg);
        return AVERROR(EINVAL);
    }
    return 0;
}

static void opt_input_file(void *optctx, const char *arg)
{
    if (input_filename) {
        fprintf(stderr, "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)", "format" },
    { "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" },
    { "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();
    parse_options(NULL, 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 %s'.\n", program_name);
        exit(1);
    }

    ret = probe_file(input_filename);

    avformat_network_deinit();

    return ret;
}