[FFmpeg-devel] [PATCH v3 1/3] libavcodec: write out user data unregistered SEI for x264

[Brad Hards]

Signed-off-by: Brad Hards <bradh at frogmouth.net>
---
 libavcodec/libx264.c | 35 ++++++++++++++++++++++++++++++-----
 1 file changed, 30 insertions(+), 5 deletions(-)

diff --git a/libavcodec/libx264.c b/libavcodec/libx264.c
index 1c27f7b441..feee8f8ee6 100644
--- a/libavcodec/libx264.c
+++ b/libavcodec/libx264.c
@@ -31,6 +31,7 @@
 #include "internal.h"
 #include "packet_internal.h"
 #include "atsc_a53.h"
+#include "sei.h"
 
 #if defined(_MSC_VER)
 #define X264_API_IMPORTS 1
@@ -303,6 +304,7 @@ static int X264_frame(AVCodecContext *ctx, AVPacket *pkt, const AVFrame *frame,
     int64_t wallclock = 0;
     X264Opaque *out_opaque;
     AVFrameSideData *sd;
+    int total_unreg_sei = 0;
 
     x264_picture_init( &x4->pic );
     x4->pic.img.i_csp   = x4->params.i_csp;
@@ -316,6 +318,7 @@ static int X264_frame(AVCodecContext *ctx, AVPacket *pkt, const AVFrame *frame,
     x4->pic.img.i_plane = avfmt2_num_planes(ctx->pix_fmt);
 
     if (frame) {
+        void *sei_data_a53_cc;
         for (i = 0; i < x4->pic.img.i_plane; i++) {
             x4->pic.img.plane[i]    = frame->data[i];
             x4->pic.img.i_stride[i] = frame->linesize[i];
@@ -349,28 +352,50 @@ static int X264_frame(AVCodecContext *ctx, AVPacket *pkt, const AVFrame *frame,
         reconfig_encoder(ctx, frame);
 
         if (x4->a53_cc) {
-            void *sei_data;
             size_t sei_size;
 
-            ret = ff_alloc_a53_sei(frame, 0, &sei_data, &sei_size);
+            ret = ff_alloc_a53_sei(frame, 0, &sei_data_a53_cc, &sei_size);
             if (ret < 0) {
                 av_log(ctx, AV_LOG_ERROR, "Not enough memory for closed captions, skipping\n");
-            } else if (sei_data) {
+            } else if (sei_data_a53_cc) {
                 x4->pic.extra_sei.payloads = av_mallocz(sizeof(x4->pic.extra_sei.payloads[0]));
                 if (x4->pic.extra_sei.payloads == NULL) {
                     av_log(ctx, AV_LOG_ERROR, "Not enough memory for closed captions, skipping\n");
-                    av_free(sei_data);
+                    av_free(sei_data_a53_cc);
                 } else {
                     x4->pic.extra_sei.sei_free = av_free;
 
                     x4->pic.extra_sei.payloads[0].payload_size = sei_size;
-                    x4->pic.extra_sei.payloads[0].payload = sei_data;
+                    x4->pic.extra_sei.payloads[0].payload = sei_data_a53_cc;
                     x4->pic.extra_sei.num_payloads = 1;
                     x4->pic.extra_sei.payloads[0].payload_type = 4;
                 }
             }
         }
 
+        for (int j = 0; j < frame->nb_side_data; j++)
+            if (frame->side_data[j]->type == AV_FRAME_DATA_SEI_UNREGISTERED)
+                total_unreg_sei++;
+        if (total_unreg_sei > 0) {
+            x264_sei_t *sei = &(x4->pic.extra_sei);
+            sei->payloads = av_realloc_array(sei->payloads,
+                                             sei->num_payloads + total_unreg_sei,
+                                             sizeof(x264_sei_payload_t));
+            if (!sei->payloads) {
+                av_log(ctx, AV_LOG_ERROR, "Not enough memory for unregistered SEI, skipping\n");
+                av_free(sei_data_a53_cc);
+                sei->num_payloads = 0;
+            } else
+                for (int j = 0; j < frame->nb_side_data; j++)
+                    if (frame->side_data[j]->type == AV_FRAME_DATA_SEI_UNREGISTERED) {
+                        x264_sei_payload_t *payload = &(sei->payloads[sei->num_payloads]);
+                        payload->payload = frame->side_data[j]->data;
+                        payload->payload_size = frame->side_data[j]->size;
+                        payload->payload_type = SEI_TYPE_USER_DATA_UNREGISTERED;
+                        sei->num_payloads++;
+                    }
+        }
+
         sd = av_frame_get_side_data(frame, AV_FRAME_DATA_REGIONS_OF_INTEREST);
         if (sd) {
             if (x4->params.rc.i_aq_mode == X264_AQ_NONE) {
-- 
2.27.0