[FFmpeg-devel] [PATCH] avformat/mxfdec: fixed jp2k_rsiz and 170M matrix

[Tomas Härdin]

sön 2021-06-06 klockan 05:27 +0300 skrev Valerii Zapodovnikov:
> Again. 240M matrix is different from BT.601! And 170M is the same
> as BT.601. It is primaries that are the same in 240M and 170M, as
> for jp2k_rsiz see page 17 of ST 422:2019. IT WAS THERE since 2006.
> This wrong jp2k_rsiz is a copy-paste of header_open_partition_key.
> ---
>  libavformat/mxf.c    | 2 +-
>  libavformat/mxfdec.c | 2 +-
>  2 files changed, 2 insertions(+), 2 deletions(-)
> 
> diff --git a/libavformat/mxf.c b/libavformat/mxf.c
> index 85a65f8718..7c355d789b 100644
> --- a/libavformat/mxf.c
> +++ b/libavformat/mxf.c
> @@ -132,7 +132,7 @@ const MXFCodecUL ff_mxf_color_space_uls[] = {
>      { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x0D,0x04,0x01,0x01,0x01,0x02,0x05,0x00,0x00 }, 14, AVCOL_SPC_RGB }, /* GBR */
>      { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x0D,0x04,0x01,0x01,0x01,0x02,0x06,0x00,0x00 }, 14, AVCOL_SPC_BT2020_NCL }, /* ITU-R BT.2020 Non-Constant Luminance */
>      /* alternate mappings for encoding */
> -    { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x06,0x04,0x01,0x01,0x01,0x02,0x03,0x00,0x00 }, 14, AVCOL_SPC_SMPTE170M }, /* = AVCOL_SPC_SMPTE240M */
> +    { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x04,0x01,0x01,0x01,0x02,0x01,0x00,0x00 }, 14, AVCOL_SPC_SMPTE170M }, /* = AVCOL_SPC_BT470BG */
>  
>      { { 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 },  0, AVCOL_SPC_UNSPECIFIED },
>  };
> diff --git a/libavformat/mxfdec.c b/libavformat/mxfdec.c
> index 3bf480a3a6..9e92ef4175 100644
> --- a/libavformat/mxfdec.c
> +++ b/libavformat/mxfdec.c
> @@ -330,7 +330,7 @@ static const uint8_t mxf_encrypted_triplet_key[]           = { 0x06,0x0e,0x2b,0x
>  static const uint8_t mxf_encrypted_essence_container[]     = { 0x06,0x0e,0x2b,0x34,0x04,0x01,0x01,0x07,0x0d,0x01,0x03,0x01,0x02,0x0b,0x01,0x00 };
>  static const uint8_t mxf_sony_mpeg4_extradata[]            = { 0x06,0x0e,0x2b,0x34,0x04,0x01,0x01,0x01,0x0e,0x06,0x06,0x02,0x02,0x01,0x00,0x00 };
>  static const uint8_t mxf_avid_project_name[]               = { 0xa5,0xfb,0x7b,0x25,0xf6,0x15,0x94,0xb9,0x62,0xfc,0x37,0x17,0x49,0x2d,0x42,0xbf };
> -static const uint8_t mxf_jp2k_rsiz[]                       = { 0x06,0x0e,0x2b,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x02,0x01,0x00 };
> +static const uint8_t mxf_jp2k_rsiz[]                       = { 0x06,0x0e,0x2b,0x34,0x01,0x01,0x01,0x0a,0x04,0x01,0x06,0x03,0x01,0x00,0x00,0x00 };
>  static const uint8_t mxf_indirect_value_utf16le[]          = { 0x4c,0x00,0x02,0x10,0x01,0x00,0x00,0x00,0x00,0x06,0x0e,0x2b,0x34,0x01,0x04,0x01,0x01 };
>  static const uint8_t mxf_indirect_value_utf16be[]          = { 0x42,0x01,0x10,0x02,0x00,0x00,0x00,0x00,0x00,0x06,0x0e,0x2b,0x34,0x01,0x04,0x01,0x01 };
>  static const uint8_t mxf_apple_coll_max_cll[]              = { 0x06,0x0e,0x2b,0x34,0x01,0x01,0x01,0x0e,0x0e,0x20,0x04,0x01,0x05,0x03,0x01,0x01 };

These indeed look like copy-paste errors. Patch looks OK to me.

/Tomas