From e2efb4b7d5885112a32b5b710958fe9fa5458bbf Mon Sep 17 00:00:00 2001
From: Loren Merritt <pengvado@videolan.org>
Date: Tue, 22 Feb 2005 22:08:07 +0000
Subject: [PATCH] Write x264's version in a SEI message.

git-svn-id: svn://svn.videolan.org/x264/trunk@136 df754926-b1dd-0310-bc7b-ec298dee348c
---
 common/common.h   |  2 +-
 encoder/encoder.c | 13 +++++++++++++
 encoder/set.c     | 26 ++++++++++++++++++++++++++
 encoder/set.h     |  1 +
 4 files changed, 41 insertions(+), 1 deletion(-)

diff --git a/common/common.h b/common/common.h
index 2dab995e..8667c76e 100644
--- a/common/common.h
+++ b/common/common.h
@@ -179,7 +179,7 @@ struct x264_t
     struct
     {
         int         i_nal;
-        x264_nal_t  nal[3];         /* for now 3 is enought */
+        x264_nal_t  nal[4];         /* for now 4 is enough */
         int         i_bitstream;    /* size of p_bitstream */
         uint8_t     *p_bitstream;   /* will hold data for all nal */
         bs_t        bs;
diff --git a/encoder/encoder.c b/encoder/encoder.c
index 65e40d36..78932774 100644
--- a/encoder/encoder.c
+++ b/encoder/encoder.c
@@ -526,6 +526,11 @@ int x264_encoder_headers( x264_t *h, x264_nal_t **pp_nal, int *pi_nal )
     /* Put SPS and PPS */
     if( h->i_frame == 0 )
     {
+        /* identify ourself */
+        x264_nal_start( h, NAL_SEI, NAL_PRIORITY_DISPOSABLE );
+        x264_sei_version_write( &h->out.bs );
+        x264_nal_end( h );
+
         /* generate sequence parameters */
         x264_nal_start( h, NAL_SPS, NAL_PRIORITY_HIGHEST );
         x264_sps_write( &h->out.bs, h->sps );
@@ -1103,6 +1108,14 @@ do_encode:
     /* Write SPS and PPS */
     if( i_nal_type == NAL_SLICE_IDR )
     {
+        if( h->fenc->i_frame == 0 )
+        {
+            /* identify ourself */
+            x264_nal_start( h, NAL_SEI, NAL_PRIORITY_DISPOSABLE );
+            x264_sei_version_write( &h->out.bs );
+            x264_nal_end( h );
+        }
+
         /* generate sequence parameters */
         x264_nal_start( h, NAL_SPS, NAL_PRIORITY_HIGHEST );
         x264_sps_write( &h->out.bs, h->sps );
diff --git a/encoder/set.c b/encoder/set.c
index 841ec763..c0bfa08b 100644
--- a/encoder/set.c
+++ b/encoder/set.c
@@ -377,3 +377,29 @@ void x264_pps_write( bs_t *s, x264_pps_t *pps )
     bs_rbsp_trailing( s );
 }
 
+void x264_sei_version_write( bs_t *s )
+{
+    int i;
+    // random ID number generated according to ISO-11578
+    const uint8_t uuid[16] = {
+        0xdc, 0x45, 0xe9, 0xbd, 0xe6, 0xd9, 0x48, 0xb7,
+        0x96, 0x2c, 0xd8, 0x20, 0xd9, 0x23, 0xee, 0xef
+    };
+    char version[256];
+    int length;
+    sprintf( version, "x264 - core 0x%x - H.264/MPEG-4 AVC codec - Copyleft 2005 - http://www.videolan.org/x264.html",
+             X264_BUILD );
+    length = strlen(version)+1+16;
+
+    bs_write( s, 8, 0x5 ); // payload_type = user_data_unregistered
+    while( length > 255 )
+        bs_write( s, 8, 255 ), length -= 255;
+    bs_write( s, 8, length ); // payload_size
+
+    for( i = 0; i < 16; i++ )
+        bs_write( s, 8, uuid[i] );
+    for( i = 0; i < length-16; i++ )
+        bs_write( s, 8, version[i] );
+
+    bs_rbsp_trailing( s );
+}
diff --git a/encoder/set.h b/encoder/set.h
index 44cae088..62f3540e 100644
--- a/encoder/set.h
+++ b/encoder/set.h
@@ -28,5 +28,6 @@ void x264_sps_init( x264_sps_t *sps, int i_id, x264_param_t *param );
 void x264_sps_write( bs_t *s, x264_sps_t *sps );
 void x264_pps_init( x264_pps_t *pps, int i_id, x264_param_t *param, x264_sps_t *sps );
 void x264_pps_write( bs_t *s, x264_pps_t *pps );
+void x264_sei_version_write( bs_t *s );
 
 #endif
-- 
2.40.0