[FFmpeg-devel] [PATCH] lavf/mxfdec: handle identification metadata

[Matthieu Bouron]

On Fri, Mar 29, 2013 at 8:21 PM, Matthieu Bouron
<matthieu.bouron at gmail.com>wrote:

> ---
>  libavformat/mxfdec.c | 131
> +++++++++++++++++++++++++++++++++++++++++++++++++++
>  1 file changed, 131 insertions(+)
>
> diff --git a/libavformat/mxfdec.c b/libavformat/mxfdec.c
> index 4580e1b..fa1a0fe 100644
> --- a/libavformat/mxfdec.c
> +++ b/libavformat/mxfdec.c
> @@ -1619,6 +1619,136 @@ fail_and_free:
>      return ret;
>  }
>
> +static int mxf_read_uid(AVIOContext *pb, int size, UID uid)
> +{
> +    if (size != 16)
> +        return AVERROR(EINVAL);
> +
> +    avio_read(pb, uid, size);
> +
> +    return 0;
> +}
> +
> +static int mxf_read_utf16_string(AVIOContext *pb, int size, char** str)
> +{
> +    int ret;
> +    char *buf;
> +    if (size <= 0)
> +        return AVERROR(EINVAL);
> +
> +    buf = av_malloc(size + 1);
> +    if (!buf)
> +        return AVERROR(ENOMEM);
> +
> +    if ((ret = avio_get_str16be(pb, size, buf, size + 1)) < 0) {
> +        av_free(buf);
> +        return ret;
> +    }
> +
> +    avio_skip(pb, size - ret);
> +    *str = buf;
> +
> +    return ret;
> +}
> +
> +static int mxf_read_timestamp(AVIOContext *pb, int size, uint64_t *ts)
> +{
> +    if (size != 8)
> +        return AVERROR(EINVAL);
> +
> +    *ts = avio_rb64(pb);
> +    return 0;
> +}
> +
> +
> +static int mxf_uid_to_str(UID uid, char **str)
> +{
> +    int i;
> +    char *p;
> +    p = *str = av_mallocz(sizeof(UID) * 2 + 1);
> +    if (!p)
> +        return AVERROR(ENOMEM);
> +    for (i = 0; i < sizeof(UID); i++) {
> +        snprintf(p, 2 + 1, "%.2x", uid[i]);
> +        p += 2;
> +    }
> +    return 0;
> +}
> +
> +static int mxf_timestamp_to_str(uint64_t timestamp, char **str)
> +{
> +    struct tm time;
> +    time.tm_year = (timestamp >> 48) - 1900;
> +    time.tm_mon  = (timestamp >> 48 & 0xF) - 1;
> +    time.tm_mday = (timestamp >> 32 & 0xF);
> +    time.tm_hour = (timestamp >> 24 & 0XF);
> +    time.tm_min  = (timestamp >> 16 & 0xF);
> +    time.tm_sec  = (timestamp >> 8  & 0xF);
> +
> +    *str = av_mallocz(32);
> +    if (!*str)
> +        return AVERROR(ENOMEM);
> +    strftime(*str, 32, "%F %T", &time);
> +
> +    return 0;
> +}
> +
> +#define SET_STR_METADATA(name, str) \
> +    if ((ret = mxf_read_utf16_string(pb, size, &str)) < 0) \
> +        return ret; \
> +    av_dict_set(&s->metadata, name, str, AV_DICT_DONT_STRDUP_VAL);
> +
> +#define SET_UID_METADATA(name, var, str) \
> +    if ((ret = mxf_read_uid(pb, size, var)) < 0) \
> +        return ret; \
> +    if ((ret = mxf_uid_to_str(var, &str)) < 0) \
> +        return ret; \
> +    av_dict_set(&s->metadata, name, str, AV_DICT_DONT_STRDUP_VAL);
> +
> +#define SET_TS_METADATA(name, var, str) \
> +    if ((ret = mxf_read_timestamp(pb, size, &var)) < 0) \
> +        return ret; \
> +    if ((ret = mxf_timestamp_to_str(var, &str)) < 0) \
> +        return ret; \
> +    av_dict_set(&s->metadata, name, str, AV_DICT_DONT_STRDUP_VAL);
> +
> +static int mxf_read_identification_metadata(void *arg, AVIOContext *pb,
> int tag, int size, UID _uid, int64_t klv_offset)
> +{
> +    MXFContext *mxf = arg;
> +    AVFormatContext *s = mxf->fc;
> +    int ret;
> +    UID uid = { 0 };
> +    char *str = NULL;
> +    uint64_t ts;
> +    switch (tag) {
> +    case 0x3C0A:
> +        SET_UID_METADATA("uid", uid, str)
> +    break;
> +    case 0x3C09:
> +        SET_UID_METADATA("generation_uid", uid, str)
> +    break;
> +    case 0x3C01:
> +        SET_STR_METADATA("company_name", str)
> +    break;
> +    case 0x3C02:
> +        SET_STR_METADATA("product_name", str)
> +    break;
> +    case 0x3C04:
> +        SET_STR_METADATA("product_version", str)
> +    break;
> +    case 0x3C05:
> +        SET_UID_METADATA("product_uid", uid, str)
> +    break;
> +    case 0x3C06:
> +        SET_TS_METADATA("modification_date", ts, str)
> +    break;
> +    case 0x3C08:
> +        SET_STR_METADATA("application_platform", str)
> +    break;
> +    }
> +    return 0;
> +}
> +
>  static const MXFMetadataReadTableEntry mxf_metadata_read_table[] = {
>      { {
> 0x06,0x0E,0x2B,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x05,0x01,0x00
> }, mxf_read_primer_pack },
>      { {
> 0x06,0x0E,0x2B,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x02,0x01,0x00
> }, mxf_read_partition_pack },
> @@ -1631,6 +1761,7 @@ static const MXFMetadataReadTableEntry
> mxf_metadata_read_table[] = {
>      { {
> 0x06,0x0E,0x2B,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x03,0x04,0x00
> }, mxf_read_partition_pack },
>      { {
> 0x06,0x0E,0x2B,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x04,0x02,0x00
> }, mxf_read_partition_pack },
>      { {
> 0x06,0x0E,0x2B,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x04,0x04,0x00
> }, mxf_read_partition_pack },
> +    { {
> 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0D,0x01,0x01,0x01,0x01,0x01,0x30,0x00
> }, mxf_read_identification_metadata },
>      { {
> 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x18,0x00
> }, mxf_read_content_storage, 0, AnyType },
>      { {
> 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x37,0x00
> }, mxf_read_source_package, sizeof(MXFPackage), SourcePackage },
>      { {
> 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x36,0x00
> }, mxf_read_material_package, sizeof(MXFPackage), MaterialPackage },
> --
> 1.8.2
>
>
ping