[FFmpeg-devel] [PATCH] lavc/libwebpenc_animencoder: handle frame durations and AV_CODEC_CAP_ENCODER_REORDERED_OPAQUE

[Anton Khirnov <anton@khirnov.net>]

---
 libavcodec/libwebpenc_animencoder.c | 39 +++++++++++++++++++++++++++--
 1 file changed, 37 insertions(+), 2 deletions(-)

diff --git a/libavcodec/libwebpenc_animencoder.c b/libavcodec/libwebpenc_animencoder.c
index 977f880d6c..440cae1de5 100644
--- a/libavcodec/libwebpenc_animencoder.c
+++ b/libavcodec/libwebpenc_animencoder.c
@@ -24,6 +24,8 @@
  * WebP encoder using libwebp (WebPAnimEncoder API)
  */
 
+#include "libavutil/buffer.h"
+
 #include "config.h"
 #include "codec_internal.h"
 #include "encode.h"
@@ -35,6 +37,12 @@ typedef struct LibWebPAnimContext {
     LibWebPContextCommon cc;
     WebPAnimEncoder *enc;     // the main AnimEncoder object
     int64_t first_frame_pts;  // pts of the first encoded frame.
+    int64_t end_pts;          // pts + duration of the last frame
+
+    int64_t         reordered_opaque;
+    void           *first_frame_opaque;
+    AVBufferRef    *first_frame_opaque_ref;
+
     int done;                 // If true, we have assembled the bitstream already
 } LibWebPAnimContext;
 
@@ -78,6 +86,17 @@ static int libwebp_anim_encode_frame(AVCodecContext *avctx, AVPacket *pkt,
                 WebPDataClear(&assembled_data);
                 s->done = 1;
                 pkt->pts = s->first_frame_pts;
+
+                if (pkt->pts != AV_NOPTS_VALUE && s->end_pts > pkt->pts)
+                    pkt->duration = s->end_pts - pkt->pts;
+
+                avctx->reordered_opaque = s->reordered_opaque;
+                if (avctx->flags & AV_CODEC_FLAG_COPY_OPAQUE) {
+                    pkt->opaque               = s->first_frame_opaque;
+                    pkt->opaque_ref           = s->first_frame_opaque_ref;
+                    s->first_frame_opaque_ref = NULL;
+                }
+
                 *got_packet = 1;
                 return 0;
             } else {
@@ -107,8 +126,21 @@ static int libwebp_anim_encode_frame(AVCodecContext *avctx, AVPacket *pkt,
             goto end;
         }
 
-        if (!avctx->frame_number)
+        if (!avctx->frame_number) {
             s->first_frame_pts = frame->pts;
+            s->reordered_opaque = frame->reordered_opaque;
+
+            if (avctx->flags & AV_CODEC_FLAG_COPY_OPAQUE) {
+                s->first_frame_opaque = frame->opaque;
+                ret = av_buffer_replace(&s->first_frame_opaque_ref, frame->opaque_ref);
+                if (ret < 0)
+                    goto end;
+            }
+        }
+
+        if (frame->pts != AV_NOPTS_VALUE)
+            s->end_pts = frame->pts + frame->duration;
+
         ret = 0;
         *got_packet = 0;
 
@@ -126,6 +158,8 @@ static int libwebp_anim_encode_close(AVCodecContext *avctx)
     av_frame_free(&s->cc.ref);
     WebPAnimEncoderDelete(s->enc);
 
+    av_buffer_unref(&s->first_frame_opaque_ref);
+
     return 0;
 }
 
@@ -134,7 +168,8 @@ const FFCodec ff_libwebp_anim_encoder = {
     CODEC_LONG_NAME("libwebp WebP image"),
     .p.type         = AVMEDIA_TYPE_VIDEO,
     .p.id           = AV_CODEC_ID_WEBP,
-    .p.capabilities = AV_CODEC_CAP_DR1 | AV_CODEC_CAP_DELAY,
+    .p.capabilities = AV_CODEC_CAP_DR1 | AV_CODEC_CAP_DELAY |
+                      AV_CODEC_CAP_ENCODER_REORDERED_OPAQUE,
     .p.pix_fmts     = ff_libwebpenc_pix_fmts,
     .p.priv_class   = &ff_libwebpenc_class,
     .p.wrapper_name = "libwebp",
-- 
2.35.1

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