Return final video metadata from the preparation worker

src/chat/chat_msg.c

@@ -251,7 +251,7 @@ static void on_media_registered(void* arg, int err, const struct media_index_res
     u_free(sig_msg); u_free(json); u_free(full_data); u_free(mctx);
 }
 
-static void on_video_prepared(void* arg, int err) {
+static void on_video_prepared(void* arg, int err, const struct video_info* vi) {
     struct media_submit_ctx* mctx = (struct media_submit_ctx*)arg;
     struct chat_core_ctx* cc = CC(mctx->inst);
 
@@ -263,13 +263,12 @@ static void on_video_prepared(void* arg, int err) {
     }
 
     /* после транскода знаем итоговую длительность и размеры — для тела сообщения */
-    struct video_info vi;
-    if (video_get_info(mctx->media_dest, &vi) == 0 && vi.is_video) {
-        mctx->duration_ms = vi.duration_ms;
-        mctx->width = vi.width;
-        mctx->height = vi.height;
+    if (vi && vi->is_video) {
+        mctx->duration_ms = vi->duration_ms;
+        mctx->width = vi->width;
+        mctx->height = vi->height;
         DEBUG_INFO(DEBUG_CATEGORY_CHAT_SYNC, "%s: video prepared %dx%d dur=%lldms",
-                   CC_ID, vi.width, vi.height, (long long)vi.duration_ms);
+                   CC_ID, vi->width, vi->height, (long long)vi->duration_ms);
     }
 
     char media_base[1024];
@@ -343,7 +342,7 @@ void chat_core_submit_media_message(struct UTUN_INSTANCE* inst, struct chat_msg_
 
     if (req->media_video) {
         if (video_transcode_start(inst->media_async, inst->ua, req->media_src, req->media_dest, on_video_prepared, mctx) < 0)
-            on_video_prepared(mctx, -1);
+            on_video_prepared(mctx, -1, NULL);
         return;
     }
 

src/video/video.c

@@ -46,7 +46,7 @@ int video_get_info(const char* path, struct video_info* out) { (void)path; (void
 int video_needs_transcode(const struct video_info* info) { (void)info; return 1; }
 
 int video_transcode_start(struct media_async* owner, struct UASYNC* ua, const char* src, const char* dst,
-                          void (*done)(void* arg, int err), void* arg) {
+                          void (*done)(void* arg, int err, const struct video_info* info), void* arg) {
     (void)owner; (void)ua; (void)src; (void)dst; (void)done; (void)arg;
     DEBUG_ERROR(DEBUG_CATEGORY_VIDEO, "video: built without FFmpeg (HAVE_FFMPEG undefined)");
     return -1;
@@ -191,7 +191,8 @@ struct vc_ctx {
     char             src[1024];
     char             dst[1024];
     struct UASYNC*   ua;
-    void (*done)(void* arg, int err);
+    void (*done)(void* arg, int err, const struct video_info* info);
+    struct video_info result;
     void*            arg;
 
     int              err;
@@ -529,7 +530,7 @@ static void vc_done_trampoline(void* raw, int error) {
     struct vc_ctx* ctx = (struct vc_ctx*)raw;
     vc_active_set(0);
     vc_progress_set(-1);
-    if (ctx->done) ctx->done(ctx->arg, error ? error : ctx->err);
+    if (ctx->done) ctx->done(ctx->arg, error ? error : ctx->err, &ctx->result);
     u_free(ctx);
 }
 
@@ -567,11 +568,12 @@ static void vc_thread_entry(void* raw) {
     vc_cleanup(ctx);
 
 out:
+    if (!ctx->err && video_get_info(ctx->dst, &ctx->result)) ctx->err = -1;
     return;
 }
 
 int video_transcode_start(struct media_async* owner, struct UASYNC* ua, const char* src, const char* dst,
-                          void (*done)(void* arg, int err), void* arg) {
+                          void (*done)(void* arg, int err, const struct video_info* info), void* arg) {
     if (!owner || !ua || !src || !dst || !done) {
         DEBUG_ERROR(DEBUG_CATEGORY_VIDEO, "video: transcode_start invalid args");
         return -1;

src/video/video.h

@@ -58,7 +58,7 @@ int video_needs_transcode(const struct video_info* info);
 struct media_async;
 int video_transcode_start(struct media_async* owner, struct UASYNC* ua,
                           const char* src, const char* dst,
-                          void (*done)(void* arg, int err), void* arg);
+                          void (*done)(void* arg, int err, const struct video_info* info), void* arg);
 
 /* Прогресс активного транскода в промилле 0..1000, -1 если транскода нет. */
 int video_transcode_get_progress(void);