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[FFmpeg-devel,v2,1/2] Add constants for KLV pseudo-profile.

Message ID 20200527100200.17118-1-bradh@frogmouth.net
State New
Headers show
Series [FFmpeg-devel,v2,1/2] Add constants for KLV pseudo-profile. | expand

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Commit Message

Brad Hards May 27, 2020, 10:01 a.m. UTC 
There are two different ways KLV is used in MISB specs - sync and async.
The corresponding text (in ST1401) says:

ISO/IEC 13818-1 Table-34 defines a stream_type = 0x15 for “Metadata carried in PES packets,”
and Table 2-22 defines a stream_id = 0xFC for “metadata stream.”

and

In ISO/IEC 13818-1, Table-34 defines a stream_type = 0x06 for “PES packets containing private
data,” and Table 2-22 defines a stream_id = 0xBD for “private_stream_1.”

These constants allow us to distinguish the two cases, as codec profiles.
---
 libavcodec/avcodec.h | 3 +++
 1 file changed, 3 insertions(+)
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Patch

diff --git a/libavcodec/avcodec.h b/libavcodec/avcodec.h
index f10b7a06ec..f2734bbb1e 100644
--- a/libavcodec/avcodec.h
+++ b/libavcodec/avcodec.h
@@ -2102,6 +2102,9 @@  typedef struct AVCodecContext {
 #define FF_PROFILE_ARIB_PROFILE_A 0
 #define FF_PROFILE_ARIB_PROFILE_C 1
 
+#define FF_PROFILE_KLVA_SYNC 0
+#define FF_PROFILE_KLVA_ASYNC 1
+
     /**
      * level
      * - encoding: Set by user.