Add webdownload element

fluendo · Nov 12, 2024 · 832a299 · 832a299
1 parent b1c6e58
commit 832a299
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Showing 13 changed files with 558 additions and 7 deletions.
diff --git a/gst.wasm/subprojects/gst-plugins-web/gst-libs/gst/web/gstwebutils.cpp b/gst.wasm/subprojects/gst-plugins-web/gst-libs/gst/web/gstwebutils.cpp
@@ -569,3 +569,76 @@ EMSCRIPTEN_BINDINGS (gst_web_transport_src)
   function ("gst_web_utils_js_worker_transfer_object",
       &gst_web_utils_js_worker_transfer_object);
 }
+
+GstVideoFormat
+gst_web_utils_video_format_from_web_format (const char *vf_format)
+{
+  GstVideoFormat format = GST_VIDEO_FORMAT_UNKNOWN;
+
+  // TODO: gst_video_format_from_string?
+
+  if (!g_strcmp0 (vf_format, "I420")) {
+    format = GST_VIDEO_FORMAT_I420;
+  } else if (!g_strcmp0 (vf_format, "I420A")) {
+    format = GST_VIDEO_FORMAT_A420;
+  } else if (!g_strcmp0 (vf_format, "I422")) {
+    format = GST_VIDEO_FORMAT_Y42B;
+  } else if (!g_strcmp0 (vf_format, "I444")) {
+    format = GST_VIDEO_FORMAT_Y444;
+  } else if (!g_strcmp0 (vf_format, "NV12")) {
+    format = GST_VIDEO_FORMAT_NV12;
+  } else if (!g_strcmp0 (vf_format, "RGBA")) {
+    format = GST_VIDEO_FORMAT_RGBA;
+  } else if (!g_strcmp0 (vf_format, "RGBX")) {
+    format = GST_VIDEO_FORMAT_RGBx;
+  } else if (!g_strcmp0 (vf_format, "BGRA")) {
+    format = GST_VIDEO_FORMAT_BGRA;
+  } else if (!g_strcmp0 (vf_format, "BGRX")) {
+    format = GST_VIDEO_FORMAT_BGRx;
+  } else {
+    GST_ERROR ("Unsupported format %s", vf_format);
+  }
+
+  return format;
+}
+
+const char *
+gst_web_utils_video_format_to_web_format (GstVideoFormat format)
+{
+  const char *vf_format = NULL;
+
+  switch (format) {
+    case GST_VIDEO_FORMAT_I420:
+      vf_format = "I420";
+      break;
+    case GST_VIDEO_FORMAT_A420:
+      vf_format = "I420A";
+      break;
+    case GST_VIDEO_FORMAT_Y42B:
+      vf_format = "I422";
+      break;
+    case GST_VIDEO_FORMAT_Y444:
+      vf_format = "I444";
+      break;
+    case GST_VIDEO_FORMAT_NV12:
+      vf_format = "NV12";
+      break;
+    case GST_VIDEO_FORMAT_RGBA:
+      vf_format = "RGBA";
+      break;
+    case GST_VIDEO_FORMAT_RGBx:
+      vf_format = "RGBX";
+      break;
+    case GST_VIDEO_FORMAT_BGRA:
+      vf_format = "BGRA";
+      break;
+    case GST_VIDEO_FORMAT_BGRx:
+      vf_format = "BGRX";
+      break;
+    default:
+      GST_ERROR ("Unsupported GstVideoFormat: %d", format);
+      break;
+  }
+
+  return vf_format;
+}
diff --git a/gst.wasm/subprojects/gst-plugins-web/gst-libs/gst/web/gstwebutils.h b/gst.wasm/subprojects/gst-plugins-web/gst-libs/gst/web/gstwebutils.h
@@ -21,6 +21,7 @@
 #ifndef __GST_WEB_UTILS_H__
 #define __GST_WEB_UTILS_H__
 
+#include <gst/video/video.h>
 #include "gstwebcanvas.h"
 
 #define GST_WEB_UTILS_MESSAGE_PROPOSE_OBJECT_NAME "GstWebProposeObjectMessage"
@@ -44,9 +45,11 @@ void gst_web_utils_js_register_on_message (void);
 void gst_web_utils_js_unregister_on_message (void);
 void gst_web_utils_element_process_request_object (
     GstElement *e, GstMessage *msg, guintptr object);
-
 GstMessage *gst_web_utils_message_new_request_object (GstElement *src,
     const gchar *cb_name, const gchar *object_name, gpointer user_data);
+GstVideoFormat gst_web_utils_video_format_from_web_format (
+    const char *vf_format);
+const char *gst_web_utils_video_format_to_web_format (GstVideoFormat format);
 
 G_END_DECLS
 

diff --git a/gst.wasm/subprojects/gst-plugins-web/gst-libs/gst/web/gstwebvideoframe.cpp b/gst.wasm/subprojects/gst-plugins-web/gst-libs/gst/web/gstwebvideoframe.cpp
@@ -30,7 +30,10 @@
 #endif
 
 #include <gst/gst.h>
+#include <emscripten.h>
 #include <emscripten/bind.h>
+#include <gst/video/gstvideometa.h>
+#include <gst/web/gstwebutils.h>
 
 #include "gstwebrunner.h"
 #include "gstwebvideoframe.h"
@@ -77,6 +80,15 @@ typedef struct _GstWebVideoFrameAllocatorClass
   GstAllocatorClass parent_class;
 } GstWebVideoFrameAllocatorClass;
 
+typedef struct _GstWebVideoFrameAllocatorMapCpuData
+{
+  GstWebVideoFrame *self;
+  guint8 *data;
+  gsize size;
+  GstVideoInfo *info;
+  gboolean result;
+} GstWebVideoFrameAllocatorMapCpuData;
+
 typedef struct _GstWebVideoFrameAllocationSizeData
 {
   val video_frame;
@@ -109,20 +121,99 @@ GST_DEFINE_MINI_OBJECT_TYPE (GstWebVideoFrame, gst_web_video_frame);
 G_DEFINE_TYPE (GstWebVideoFrameAllocator, gst_web_video_frame_allocator,
     GST_TYPE_ALLOCATOR);
 
+static gboolean
+gst_web_video_frame_map_internal (
+    GstWebVideoFrame *self, GstVideoInfo *info, gpointer data, gsize size)
+{
+  g_return_val_if_fail (self != NULL, FALSE);
+  g_return_val_if_fail (
+      info == NULL || (info != NULL && info->finfo != NULL), FALSE);
+  g_return_val_if_fail (data != NULL, FALSE);
+
+  val video_frame = gst_web_video_frame_get_handle (self);
+  val data_view =
+      val (typed_memory_view<uint8_t> (size, static_cast<uint8_t *> (data)));
+  val options = val::object ();
+
+  if (info != NULL) {
+    const char *format;
+
+    format = gst_web_utils_video_format_to_web_format (
+        GST_VIDEO_FORMAT_INFO_FORMAT (info->finfo));
+    if (format == NULL) {
+      GST_ERROR ("Format %s is not supported.",
+          GST_VIDEO_FORMAT_INFO_NAME (info->finfo));
+      return FALSE;
+    }
+    options.set ("format", format);
+  } else {
+    GST_DEBUG ("No format specified. Use default format.");
+  }
+
+  video_frame.call<val> ("copyTo", data_view, options).await ();
+
+  return TRUE;
+}
+
+static void
+gst_web_video_frame_allocator_map_cpu_access (gpointer data)
+{
+  GstWebVideoFrameAllocatorMapCpuData *cdata =
+      (GstWebVideoFrameAllocatorMapCpuData *) data;
+  GstWebVideoFrame *self = cdata->self;
+
+  cdata->result = gst_web_video_frame_map_internal (
+      self, cdata->info, cdata->data, cdata->size);
+}
+
+gboolean
+gst_web_video_frame_copy_to (
+    GstWebVideoFrame *self, GstVideoInfo *info, guint8 *data, gsize size)
+{
+  GstWebVideoFrameAllocatorMapCpuData cdata = { .self = self,
+    .data = data,
+    .size = info->size,
+    .info = info,
+    .result = FALSE };
+
+  g_return_val_if_fail (self != NULL, FALSE);
+  g_return_val_if_fail (info != NULL, FALSE);
+
+  gst_web_runner_send_message (self->priv->runner,
+      gst_web_video_frame_allocator_map_cpu_access, &cdata);
+
+  return cdata.result;
+}
+
 static gpointer
 gst_web_video_frame_allocator_map_full (
-    GstWebVideoFrame *mem, GstMapInfo *info, gsize size)
+    GstWebVideoFrame *self, GstMapInfo *info, gsize size)
 {
-  GST_FIXME ("Trying to map");
+  GstWebVideoFrameAllocatorMapCpuData data = {
+    .self = self, .data = NULL, .size = size, .info = NULL, .result = FALSE
+  };
 
-  return NULL;
+  if ((info->flags & GST_MAP_WRITE) == GST_MAP_WRITE) {
+    GST_DEBUG ("Write flags not supported");
+  }
+
+  data.data = (guint8 *) g_malloc (data.size);
+
+  gst_web_runner_send_message (
+      self->priv->runner, gst_web_video_frame_allocator_map_cpu_access, &data);
+
+  if (!data.result) {
+    return NULL;
+  }
+
+  return data.data;
 }
 
 static void
 gst_web_video_frame_allocator_unmap_full (
     GstWebVideoFrame *mem, GstMapInfo *info)
 {
-  GST_FIXME ("Trying to unmap");
+  g_free (info->data);
 }
 
 static GstMemory *

diff --git a/gst.wasm/subprojects/gst-plugins-web/gst/web/gstweb.c b/gst.wasm/subprojects/gst-plugins-web/gst/web/gstweb.c
@@ -32,6 +32,8 @@
 #include "gstwebstreamsrc.h"
 #include "gstwebcanvassink.h"
 #include "gstwebcanvassrc.h"
+#include "gstwebdownload.h"
+
 #include "codecs/gstwebcodecs.h"
 #include "transport/gstwebtransportsrc.h"
 
@@ -47,6 +49,8 @@ plugin_init (GstPlugin *plugin)
   gst_element_register_web_fetch_src (plugin);
   gst_element_register_web_stream_src (plugin);
   gst_element_register_web_transport_src (plugin);
+  gst_element_register_web_download (plugin);
+
   return TRUE;
 }