plugins: add base encoder element.

vaapiencode element is based on GstVideoEncoder APIs.

Signed-off-by: Gwenole Beauchesne <gwenole.beauchesne@intel.com>

gst/vaapi/Makefile.am

@@ -56,6 +56,19 @@ libgstvaapi_source_h = \
 	gstvaapivideometa.h	\
 	$(NULL)
 
+libgstvaapi_enc_source_c =	\
+	gstvaapiencode.c	\
+	$(NULL)
+
+libgstvaapi_enc_source_h =	\
+	gstvaapiencode.h	\
+	$(NULL)
+
+if USE_ENCODERS
+libgstvaapi_source_c += $(libgstvaapi_enc_source_c)
+libgstvaapi_source_h += $(libgstvaapi_enc_source_h)
+endif
+
 libgstvaapi_x11_source_c = gstvaapivideoconverter_x11.c
 libgstvaapi_x11_source_h = gstvaapivideoconverter_x11.h
 

gst/vaapi/gstvaapiencode.c

@@ -0,0 +1,764 @@
+/*
+ *  gstvaapiencode.c - VA-API video encoder
+ *
+ *  Copyright (C) 2013 Intel Corporation
+ *
+ *  This library is free software; you can redistribute it and/or
+ *  modify it under the terms of the GNU Lesser General Public License
+ *  as published by the Free Software Foundation; either version 2.1
+ *  of the License, or (at your option) any later version.
+ *
+ *  This library is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ *  Lesser General Public License for more details.
+ *
+ *  You should have received a copy of the GNU Lesser General Public
+ *  License along with this library; if not, write to the Free
+ *  Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
+ *  Boston, MA 02110-1301 USA
+ */
+
+#include "gst/vaapi/sysdeps.h"
+#include <gst/video/videocontext.h>
+#include <gst/vaapi/gstvaapidisplay.h>
+#include <gst/vaapi/gstvaapiencoder_priv.h>
+#include <gst/vaapi/gstvaapiencoder_objects.h>
+#include "gstvaapiencode.h"
+#include "gstvaapipluginutil.h"
+#include "gstvaapivideometa.h"
+#include "gstvaapivideomemory.h"
+#include "gstvaapivideobufferpool.h"
+
+#define GST_PLUGIN_NAME "vaapiencode"
+#define GST_PLUGIN_DESC "A VA-API based video encoder"
+
+#define GST_VAAPI_ENCODE_FLOW_TIMEOUT           GST_FLOW_CUSTOM_SUCCESS
+#define GST_VAAPI_ENCODE_FLOW_MEM_ERROR         GST_FLOW_CUSTOM_ERROR
+#define GST_VAAPI_ENCODE_FLOW_CONVERT_ERROR     GST_FLOW_CUSTOM_ERROR_1
+#define GST_VAAPI_ENCODE_FLOW_CODEC_DATA_ERROR  GST_FLOW_CUSTOM_ERROR_2
+
+typedef struct _GstVaapiEncodeFrameUserData
+{
+  GstVaapiEncObjUserDataHead head;
+  GstBuffer *vaapi_buf;
+} GstVaapiEncodeFrameUserData;
+
+GST_DEBUG_CATEGORY_STATIC (gst_vaapiencode_debug);
+
+#define GST_CAT_DEFAULT gst_vaapiencode_debug
+
+#define GstVideoContextClass GstVideoContextInterface
+
+/* GstImplementsInterface interface */
+#if !GST_CHECK_VERSION(1,0,0)
+static gboolean
+gst_vaapiencode_implements_interface_supported (GstImplementsInterface * iface,
+    GType type)
+{
+  return (type == GST_TYPE_VIDEO_CONTEXT);
+}
+
+static void
+gst_vaapiencode_implements_iface_init (GstImplementsInterfaceClass * iface)
+{
+  iface->supported = gst_vaapiencode_implements_interface_supported;
+}
+#endif
+
+/* context(display) interface */
+static void
+gst_vaapiencode_set_video_context (GstVideoContext * context,
+    const gchar * type, const GValue * value)
+{
+  GstVaapiEncode *const encode = GST_VAAPIENCODE (context);
+
+  gst_vaapi_set_display (type, value, &encode->display);
+}
+
+static void
+gst_video_context_interface_init (GstVideoContextInterface * iface)
+{
+  iface->set_context = gst_vaapiencode_set_video_context;
+}
+
+G_DEFINE_TYPE_WITH_CODE (GstVaapiEncode,
+    gst_vaapiencode, GST_TYPE_VIDEO_ENCODER,
+#if !GST_CHECK_VERSION(1,0,0)
+    G_IMPLEMENT_INTERFACE (GST_TYPE_IMPLEMENTS_INTERFACE,
+        gst_vaapiencode_implements_iface_init);
+#endif
+    G_IMPLEMENT_INTERFACE (GST_TYPE_VIDEO_CONTEXT,
+        gst_video_context_interface_init))
+
+static gboolean
+gst_vaapiencode_query (GstPad * pad, GstObject * parent,
+    GstQuery * query)
+{
+  GstVaapiEncode *const encode = GST_VAAPIENCODE (parent);
+  gboolean success;
+
+  GST_DEBUG ("vaapiencode query %s", GST_QUERY_TYPE_NAME (query));
+
+  if (gst_vaapi_reply_to_query (query, encode->display))
+    success = TRUE;
+  else if (GST_PAD_IS_SINK (pad))
+    success = encode->sinkpad_query (pad, parent, query);
+  else
+    success = encode->srcpad_query (pad, parent, query);;
+  return success;
+}
+
+static GstFlowReturn
+gst_vaapiencode_default_allocate_buffer (GstVaapiEncode * encode,
+    GstVaapiCodedBuffer * coded_buf, GstBuffer ** outbuf_ptr)
+{
+  GstBuffer *buf;
+  gint32 buf_size;
+
+  g_return_val_if_fail (coded_buf != NULL, GST_FLOW_ERROR);
+  g_return_val_if_fail (outbuf_ptr != NULL, GST_FLOW_ERROR);
+
+  if (!gst_vaapi_coded_buffer_map (coded_buf, NULL))
+    return GST_VAAPI_ENCODE_FLOW_MEM_ERROR;
+
+  buf_size = gst_vaapi_coded_buffer_get_size (coded_buf);
+  if (buf_size <= 0) {
+    GST_ERROR ("get GstVaapiCodedBuf buffer size:%d", buf_size);
+    return GST_VAAPI_ENCODE_FLOW_MEM_ERROR;
+  }
+
+  buf =
+      gst_video_encoder_allocate_output_buffer (GST_VIDEO_ENCODER_CAST (encode),
+      buf_size);
+  if (!buf) {
+    GST_ERROR ("failed to allocate output buffer of size %d", buf_size);
+    return GST_VAAPI_ENCODE_FLOW_MEM_ERROR;
+  }
+
+  if (!gst_vaapi_coded_buffer_get_buffer (coded_buf, buf)) {
+    GST_ERROR ("failed to get encoded buffer");
+    gst_buffer_replace (&buf, NULL);
+    return GST_VAAPI_ENCODE_FLOW_MEM_ERROR;
+  }
+  gst_vaapi_coded_buffer_unmap (coded_buf);
+  *outbuf_ptr = buf;
+  return GST_FLOW_OK;
+}
+
+static GstFlowReturn
+gst_vaapiencode_push_frame (GstVaapiEncode * encode, gint64 ms_timeout)
+{
+  GstVideoEncoder *const venc = GST_VIDEO_ENCODER_CAST (encode);
+  GstVaapiEncodeClass *klass = GST_VAAPIENCODE_GET_CLASS (encode);
+  GstVideoCodecFrame *out_frame = NULL;
+  GstVaapiCodedBufferProxy *coded_buf_proxy = NULL;
+  GstVaapiCodedBuffer *coded_buf;
+  GstVaapiEncoderStatus encode_status;
+  GstBuffer *output_buf;
+  GstFlowReturn ret;
+
+  g_return_val_if_fail (klass->allocate_buffer, GST_FLOW_ERROR);
+
+  encode_status = gst_vaapi_encoder_get_buffer (encode->encoder,
+      &out_frame, &coded_buf_proxy, ms_timeout);
+  if (encode_status == GST_VAAPI_ENCODER_STATUS_TIMEOUT)
+    return GST_VAAPI_ENCODE_FLOW_TIMEOUT;
+
+  if (encode_status != GST_VAAPI_ENCODER_STATUS_SUCCESS) {
+    GST_ERROR ("get encoded buffer failed, status:%d", encode_status);
+    ret = GST_FLOW_ERROR;
+    goto error;
+  }
+
+  g_assert (out_frame);
+  gst_video_codec_frame_set_user_data (out_frame, NULL, NULL);
+
+  coded_buf = coded_buf_proxy->buffer;
+  g_assert (coded_buf);
+
+  /* alloc buffer */
+  ret = klass->allocate_buffer (encode, coded_buf, &output_buf);
+  if (ret != GST_FLOW_OK)
+    goto error;
+
+  out_frame->output_buffer = output_buf;
+
+  gst_vaapi_coded_buffer_proxy_replace (&coded_buf_proxy, NULL);
+
+  /* check out_caps, need lock first */
+  GST_VIDEO_ENCODER_STREAM_LOCK (encode);
+  if (!encode->out_caps_done) {
+    GstVaapiEncoderStatus encoder_status;
+    GstVideoCodecState *old_state, *new_state;
+    GstBuffer *codec_data;
+
+    encoder_status =
+        gst_vaapi_encoder_get_codec_data (encode->encoder, &codec_data);
+    if (encoder_status != GST_VAAPI_ENCODER_STATUS_SUCCESS) {
+      ret = GST_VAAPI_ENCODE_FLOW_CODEC_DATA_ERROR;
+      goto error_unlock;
+    }
+    if (codec_data) {
+      encode->srcpad_caps = gst_caps_make_writable (encode->srcpad_caps);
+      gst_caps_set_simple (encode->srcpad_caps,
+          "codec_data", GST_TYPE_BUFFER, codec_data, NULL);
+      gst_buffer_replace (&codec_data, NULL);
+      old_state =
+          gst_video_encoder_get_output_state (GST_VIDEO_ENCODER_CAST (encode));
+      new_state =
+          gst_video_encoder_set_output_state (GST_VIDEO_ENCODER_CAST (encode),
+          gst_caps_ref (encode->srcpad_caps), old_state);
+      gst_video_codec_state_unref (old_state);
+      gst_video_codec_state_unref (new_state);
+      if (!gst_video_encoder_negotiate (GST_VIDEO_ENCODER_CAST (encode))) {
+        GST_ERROR ("failed to negotiate with caps %" GST_PTR_FORMAT,
+            encode->srcpad_caps);
+        ret = GST_FLOW_NOT_NEGOTIATED;
+        goto error_unlock;
+      }
+      GST_DEBUG ("updated srcpad caps to: %" GST_PTR_FORMAT,
+          encode->srcpad_caps);
+    }
+    encode->out_caps_done = TRUE;
+  }
+  GST_VIDEO_ENCODER_STREAM_UNLOCK (encode);
+
+  GST_DEBUG ("output:%" GST_TIME_FORMAT ", size:%d",
+      GST_TIME_ARGS (out_frame->pts), gst_buffer_get_size (output_buf));
+
+  ret = gst_video_encoder_finish_frame (venc, out_frame);
+  out_frame = NULL;
+  if (ret != GST_FLOW_OK)
+    goto error;
+
+  return GST_FLOW_OK;
+
+error_unlock:
+  GST_VIDEO_ENCODER_STREAM_UNLOCK (encode);
+error:
+  gst_vaapi_coded_buffer_proxy_replace (&coded_buf_proxy, NULL);
+  if (out_frame)
+    gst_video_codec_frame_unref (out_frame);
+
+  return ret;
+}
+
+static void
+gst_vaapiencode_buffer_loop (GstVaapiEncode * encode)
+{
+  GstFlowReturn ret;
+  const gint64 timeout = 50000; /* microseconds */
+
+  ret = gst_vaapiencode_push_frame (encode, timeout);
+  if (ret == GST_FLOW_OK || ret == GST_VAAPI_ENCODE_FLOW_TIMEOUT)
+    return;
+
+  gst_pad_pause_task (encode->srcpad);
+}
+
+static GstCaps *
+gst_vaapiencode_get_caps (GstPad * pad)
+{
+  GstVaapiEncode *const encode = GST_VAAPIENCODE (GST_OBJECT_PARENT (pad));
+  GstCaps *caps;
+
+  if (encode->sinkpad_caps)
+    caps = gst_caps_ref (encode->sinkpad_caps);
+  else
+    caps = gst_caps_copy (gst_pad_get_pad_template_caps (pad));
+  return caps;
+}
+
+static gboolean
+gst_vaapiencode_destroy (GstVaapiEncode * encode)
+{
+  gst_vaapi_encoder_replace (&encode->encoder, NULL);
+  g_clear_object (&encode->video_buffer_pool);
+
+  if (encode->sinkpad_caps) {
+    gst_caps_unref (encode->sinkpad_caps);
+    encode->sinkpad_caps = NULL;
+  }
+
+  if (encode->srcpad_caps) {
+    gst_caps_unref (encode->srcpad_caps);
+    encode->srcpad_caps = NULL;
+  }
+
+  gst_vaapi_display_replace (&encode->display, NULL);
+  return TRUE;
+}
+
+static inline gboolean
+ensure_display (GstVaapiEncode * encode)
+{
+  return gst_vaapi_ensure_display (encode,
+      GST_VAAPI_DISPLAY_TYPE_ANY, &encode->display);
+}
+
+static gboolean
+ensure_encoder (GstVaapiEncode * encode)
+{
+  GstVaapiEncodeClass *klass = GST_VAAPIENCODE_GET_CLASS (encode);
+
+  g_return_val_if_fail (klass->create_encoder, FALSE);
+
+  if (!ensure_display (encode))
+    return FALSE;
+
+  encode->encoder = klass->create_encoder (encode, encode->display);
+  g_assert (encode->encoder);
+  return (encode->encoder ? TRUE : FALSE);
+}
+
+static gboolean
+gst_vaapiencode_open (GstVideoEncoder * venc)
+{
+  GstVaapiEncode *const encode = GST_VAAPIENCODE (venc);
+  GstVaapiDisplay *const old_display = encode->display;
+  gboolean success;
+
+  encode->display = NULL;
+  success = ensure_display (encode);
+  if (old_display)
+    gst_vaapi_display_unref (old_display);
+
+  GST_DEBUG ("ensure display %s, display:%p",
+      (success ? "okay" : "failed"), encode->display);
+  return success;
+}
+
+static gboolean
+gst_vaapiencode_close (GstVideoEncoder * venc)
+{
+  GstVaapiEncode *const encode = GST_VAAPIENCODE (venc);
+
+  GST_DEBUG ("vaapiencode starting close");
+
+  return gst_vaapiencode_destroy (encode);
+}
+
+static inline gboolean
+gst_vaapiencode_update_sink_caps (GstVaapiEncode * encode,
+    GstVideoCodecState * state)
+{
+  gst_caps_replace (&encode->sinkpad_caps, state->caps);
+  encode->sink_video_info = state->info;
+  return TRUE;
+}
+
+static gboolean
+gst_vaapiencode_update_src_caps (GstVaapiEncode * encode,
+    GstVideoCodecState * in_state)
+{
+  GstVideoCodecState *out_state;
+  GstStructure *structure;
+  GstCaps *outcaps, *allowed_caps, *template_caps, *intersect;
+  GstVaapiEncoderStatus encoder_status;
+  GstBuffer *codec_data = NULL;
+
+  g_return_val_if_fail (encode->encoder, FALSE);
+
+  encode->out_caps_done = FALSE;
+
+  /* get peer caps for stream-format avc/bytestream, codec_data */
+  template_caps = gst_pad_get_pad_template_caps (encode->srcpad);
+  allowed_caps = gst_pad_get_allowed_caps (encode->srcpad);
+  intersect = gst_caps_intersect (template_caps, allowed_caps);
+  gst_caps_unref (template_caps);
+  gst_caps_unref (allowed_caps);
+
+  /* codec data was not set */
+  outcaps = gst_vaapi_encoder_set_format (encode->encoder, in_state, intersect);
+  gst_caps_unref (intersect);
+  g_return_val_if_fail (outcaps, FALSE);
+
+  if (!gst_caps_is_fixed (outcaps)) {
+    GST_ERROR ("encoder output caps was not fixed");
+    gst_caps_unref (outcaps);
+    return FALSE;
+  }
+  structure = gst_caps_get_structure (outcaps, 0);
+  if (!gst_structure_has_field (structure, "codec_data")) {
+    encoder_status =
+        gst_vaapi_encoder_get_codec_data (encode->encoder, &codec_data);
+    if (encoder_status == GST_VAAPI_ENCODER_STATUS_SUCCESS) {
+      if (codec_data) {
+        outcaps = gst_caps_make_writable (outcaps);
+        gst_caps_set_simple (outcaps,
+            "codec_data", GST_TYPE_BUFFER, codec_data, NULL);
+        gst_buffer_replace (&codec_data, NULL);
+      }
+      encode->out_caps_done = TRUE;
+    }
+  } else
+    encode->out_caps_done = TRUE;
+
+  out_state =
+      gst_video_encoder_set_output_state (GST_VIDEO_ENCODER_CAST (encode),
+      outcaps, in_state);
+
+  gst_caps_replace (&encode->srcpad_caps, out_state->caps);
+  gst_video_codec_state_unref (out_state);
+
+  GST_DEBUG ("set srcpad caps to: %" GST_PTR_FORMAT, encode->srcpad_caps);
+  return TRUE;
+}
+
+static gboolean
+gst_vaapiencode_ensure_video_buffer_pool (GstVaapiEncode * encode,
+    GstCaps * caps)
+{
+  GstBufferPool *pool;
+  GstCaps *pool_caps;
+  GstStructure *config;
+  GstVideoInfo vi;
+  gboolean need_pool;
+
+  if (!ensure_display (encode))
+    return FALSE;
+
+  if (encode->video_buffer_pool) {
+    config = gst_buffer_pool_get_config (encode->video_buffer_pool);
+    gst_buffer_pool_config_get_params (config, &pool_caps, NULL, NULL, NULL);
+    need_pool = !gst_caps_is_equal (caps, pool_caps);
+    gst_structure_free (config);
+    if (!need_pool)
+      return TRUE;
+    g_clear_object (&encode->video_buffer_pool);
+    encode->video_buffer_size = 0;
+  }
+
+  pool = gst_vaapi_video_buffer_pool_new (encode->display);
+  if (!pool)
+    goto error_create_pool;
+
+  gst_video_info_init (&vi);
+  gst_video_info_from_caps (&vi, caps);
+  if (GST_VIDEO_INFO_FORMAT (&vi) == GST_VIDEO_FORMAT_ENCODED) {
+    GST_DEBUG ("assume video buffer pool format is NV12");
+    gst_video_info_set_format (&vi, GST_VIDEO_FORMAT_NV12,
+        GST_VIDEO_INFO_WIDTH (&vi), GST_VIDEO_INFO_HEIGHT (&vi));
+  }
+  encode->video_buffer_size = vi.size;
+
+  config = gst_buffer_pool_get_config (pool);
+  gst_buffer_pool_config_set_params (config, caps, encode->video_buffer_size,
+      0, 0);
+  gst_buffer_pool_config_add_option (config,
+      GST_BUFFER_POOL_OPTION_VAAPI_VIDEO_META);
+  gst_buffer_pool_config_add_option (config, GST_BUFFER_POOL_OPTION_VIDEO_META);
+  if (!gst_buffer_pool_set_config (pool, config))
+    goto error_pool_config;
+  encode->video_buffer_pool = pool;
+  return TRUE;
+
+  /* ERRORS */
+error_create_pool:
+  {
+    GST_ERROR ("failed to create buffer pool");
+    return FALSE;
+  }
+error_pool_config:
+  {
+    GST_ERROR ("failed to reset buffer pool config");
+    gst_object_unref (pool);
+    return FALSE;
+  }
+}
+
+static gboolean
+gst_vaapiencode_set_format (GstVideoEncoder * venc, GstVideoCodecState * state)
+{
+  GstVaapiEncode *const encode = GST_VAAPIENCODE (venc);
+
+  g_return_val_if_fail (state->caps != NULL, FALSE);
+
+  if (!gst_vaapiencode_ensure_video_buffer_pool (encode, state->caps))
+    return FALSE;
+
+  if (!ensure_encoder (encode))
+    return FALSE;
+  if (!gst_vaapiencode_update_sink_caps (encode, state))
+    return FALSE;
+  if (!gst_vaapiencode_update_src_caps (encode, state))
+    return FALSE;
+
+  if (encode->out_caps_done && !gst_video_encoder_negotiate (venc)) {
+    GST_ERROR ("failed to negotiate with caps %" GST_PTR_FORMAT,
+        encode->srcpad_caps);
+    return FALSE;
+  }
+
+  return gst_pad_start_task (encode->srcpad,
+      (GstTaskFunction) gst_vaapiencode_buffer_loop, encode, NULL);
+  return TRUE;
+}
+
+static gboolean
+gst_vaapiencode_reset (GstVideoEncoder * venc, gboolean hard)
+{
+  GstVaapiEncode *const encode = GST_VAAPIENCODE (venc);
+
+  GST_DEBUG ("vaapiencode starting reset");
+
+  /* FIXME: compare sink_caps with encoder */
+  encode->is_running = FALSE;
+  encode->out_caps_done = FALSE;
+  return TRUE;
+}
+
+static GstFlowReturn
+gst_vaapiencode_get_vaapi_buffer (GstVaapiEncode * encode,
+    GstBuffer * src_buffer, GstBuffer ** out_buffer_ptr)
+{
+  GstVaapiVideoMeta *meta;
+  GstBuffer *out_buffer;
+  GstVideoFrame src_frame, out_frame;
+  GstFlowReturn ret;
+
+  *out_buffer_ptr = NULL;
+  meta = gst_buffer_get_vaapi_video_meta (src_buffer);
+  if (meta) {
+    *out_buffer_ptr = gst_buffer_ref (src_buffer);
+    return GST_FLOW_OK;
+  }
+
+  if (!GST_VIDEO_INFO_IS_YUV (&encode->sink_video_info)) {
+    GST_ERROR ("unsupported video buffer");
+    return GST_FLOW_EOS;
+  }
+
+  GST_DEBUG ("buffer %p not from our pool, copying", src_buffer);
+
+  if (!encode->video_buffer_pool)
+    goto error_no_pool;
+
+  if (!gst_buffer_pool_set_active (encode->video_buffer_pool, TRUE))
+    goto error_activate_pool;
+
+  ret = gst_buffer_pool_acquire_buffer (encode->video_buffer_pool,
+      &out_buffer, NULL);
+  if (ret != GST_FLOW_OK)
+    goto error_create_buffer;
+
+  if (!gst_video_frame_map (&src_frame, &encode->sink_video_info, src_buffer,
+          GST_MAP_READ))
+    goto error_map_src_buffer;
+
+  if (!gst_video_frame_map (&out_frame, &encode->sink_video_info, out_buffer,
+          GST_MAP_WRITE))
+    goto error_map_dst_buffer;
+
+  gst_video_frame_copy (&out_frame, &src_frame);
+  gst_video_frame_unmap (&out_frame);
+  gst_video_frame_unmap (&src_frame);
+
+  *out_buffer_ptr = out_buffer;
+  return GST_FLOW_OK;
+
+  /* ERRORS */
+error_no_pool:
+  GST_ERROR ("no buffer pool was negotiated");
+  return GST_FLOW_ERROR;
+error_activate_pool:
+  GST_ERROR ("failed to activate buffer pool");
+  return GST_FLOW_ERROR;
+error_create_buffer:
+  GST_WARNING ("failed to create image. Skipping this frame");
+  return GST_FLOW_OK;
+error_map_dst_buffer:
+  gst_video_frame_unmap (&src_frame);
+  // fall-through
+error_map_src_buffer:
+  GST_WARNING ("failed to map buffer. Skipping this frame");
+  gst_buffer_unref (out_buffer);
+  return GST_FLOW_OK;
+}
+
+static inline gpointer
+_create_user_data (GstBuffer * buf)
+{
+  GstVaapiVideoMeta *meta;
+  GstVaapiSurface *surface;
+  GstVaapiEncodeFrameUserData *user_data;
+
+  meta = gst_buffer_get_vaapi_video_meta (buf);
+  if (!meta) {
+    GST_DEBUG ("convert to vaapi buffer failed");
+    return NULL;
+  }
+  surface = gst_vaapi_video_meta_get_surface (meta);
+  if (!surface) {
+    GST_DEBUG ("vaapi_meta of codec frame doesn't have vaapisurfaceproxy");
+    return NULL;
+  }
+
+  user_data = g_slice_new0 (GstVaapiEncodeFrameUserData);
+  user_data->head.surface = surface;
+  user_data->vaapi_buf = gst_buffer_ref (buf);
+  return user_data;
+}
+
+static void
+_destroy_user_data (gpointer data)
+{
+  GstVaapiEncodeFrameUserData *user_data = (GstVaapiEncodeFrameUserData *) data;
+
+  g_assert (data);
+  if (!user_data)
+    return;
+  gst_buffer_replace (&user_data->vaapi_buf, NULL);
+  g_slice_free (GstVaapiEncodeFrameUserData, user_data);
+}
+
+static GstFlowReturn
+gst_vaapiencode_handle_frame (GstVideoEncoder * venc,
+    GstVideoCodecFrame * frame)
+{
+  GstVaapiEncode *const encode = GST_VAAPIENCODE (venc);
+  GstFlowReturn ret = GST_FLOW_OK;
+  GstVaapiEncoderStatus encoder_ret = GST_VAAPI_ENCODER_STATUS_SUCCESS;
+  GstBuffer *vaapi_buf = NULL;
+  gpointer user_data;
+
+  g_assert (encode && encode->encoder);
+  g_assert (frame && frame->input_buffer);
+
+  ret =
+      gst_vaapiencode_get_vaapi_buffer (encode, frame->input_buffer,
+      &vaapi_buf);
+  GST_VAAPI_ENCODER_CHECK_STATUS (ret == GST_FLOW_OK, ret,
+      "convert to vaapi buffer failed");
+
+  user_data = _create_user_data (vaapi_buf);
+  GST_VAAPI_ENCODER_CHECK_STATUS (user_data,
+      ret, "create frame user data failed");
+
+  gst_video_codec_frame_set_user_data (frame, user_data, _destroy_user_data);
+
+  GST_VIDEO_ENCODER_STREAM_UNLOCK (encode);
+  /*encoding frames */
+  encoder_ret = gst_vaapi_encoder_put_frame (encode->encoder, frame);
+  GST_VIDEO_ENCODER_STREAM_LOCK (encode);
+
+  GST_VAAPI_ENCODER_CHECK_STATUS (GST_VAAPI_ENCODER_STATUS_SUCCESS <=
+      encoder_ret, GST_FLOW_ERROR, "gst_vaapiencoder_encode failed.");
+
+end:
+  gst_video_codec_frame_unref (frame);
+  gst_buffer_replace (&vaapi_buf, NULL);
+  return ret;
+}
+
+static GstFlowReturn
+gst_vaapiencode_finish (GstVideoEncoder * venc)
+{
+  GstVaapiEncode *const encode = GST_VAAPIENCODE (venc);
+  GstVaapiEncoderStatus status;
+  GstFlowReturn ret = GST_FLOW_OK;
+
+  GST_DEBUG ("vaapiencode starting finish");
+
+  status = gst_vaapi_encoder_flush (encode->encoder);
+
+  GST_VIDEO_ENCODER_STREAM_UNLOCK (encode);
+  gst_pad_stop_task (encode->srcpad);
+  GST_VIDEO_ENCODER_STREAM_LOCK (encode);
+
+  while (status == GST_VAAPI_ENCODER_STATUS_SUCCESS && ret == GST_FLOW_OK)
+    ret = gst_vaapiencode_push_frame (encode, 0);
+
+  if (ret == GST_VAAPI_ENCODE_FLOW_TIMEOUT);
+  ret = GST_FLOW_OK;
+  return ret;
+}
+
+static gboolean
+gst_vaapiencode_propose_allocation (GstVideoEncoder * venc, GstQuery * query)
+{
+  GstVaapiEncode *const encode = GST_VAAPIENCODE (venc);
+  GstCaps *caps = NULL;
+  gboolean need_pool;
+
+  gst_query_parse_allocation (query, &caps, &need_pool);
+
+  if (need_pool) {
+    if (!caps)
+      goto error_no_caps;
+    if (!gst_vaapiencode_ensure_video_buffer_pool (encode, caps))
+      return FALSE;
+    gst_query_add_allocation_pool (query, encode->video_buffer_pool,
+        encode->video_buffer_size, 0, 0);
+  }
+
+  gst_query_add_allocation_meta (query, GST_VAAPI_VIDEO_META_API_TYPE, NULL);
+  gst_query_add_allocation_meta (query, GST_VIDEO_META_API_TYPE, NULL);
+  return TRUE;
+
+  /* ERRORS */
+error_no_caps:
+  {
+    GST_ERROR ("no caps specified");
+    return FALSE;
+  }
+}
+
+static void
+gst_vaapiencode_finalize (GObject * object)
+{
+  GstVaapiEncode *const encode = GST_VAAPIENCODE (object);
+
+  gst_vaapiencode_destroy (encode);
+
+  encode->sinkpad = NULL;
+  encode->srcpad = NULL;
+
+  G_OBJECT_CLASS (gst_vaapiencode_parent_class)->finalize (object);
+}
+
+static void
+gst_vaapiencode_init (GstVaapiEncode * encode)
+{
+  /* sink pad */
+  encode->sinkpad = GST_VIDEO_ENCODER_SINK_PAD (encode);
+  encode->sinkpad_query = GST_PAD_QUERYFUNC (encode->sinkpad);
+  gst_pad_set_query_function (encode->sinkpad, gst_vaapiencode_query);
+  gst_video_info_init (&encode->sink_video_info);
+
+  /* src pad */
+  encode->srcpad = GST_VIDEO_ENCODER_SRC_PAD (encode);
+  encode->srcpad_query = GST_PAD_QUERYFUNC (encode->srcpad);
+  gst_pad_set_query_function (encode->srcpad, gst_vaapiencode_query);
+
+  gst_pad_use_fixed_caps (encode->srcpad);
+}
+
+static void
+gst_vaapiencode_class_init (GstVaapiEncodeClass * klass)
+{
+  GObjectClass *const object_class = G_OBJECT_CLASS (klass);
+  GstVideoEncoderClass *const venc_class = GST_VIDEO_ENCODER_CLASS (klass);
+
+  GST_DEBUG_CATEGORY_INIT (gst_vaapiencode_debug,
+      GST_PLUGIN_NAME, 0, GST_PLUGIN_DESC);
+
+  object_class->finalize = gst_vaapiencode_finalize;
+
+  venc_class->open = GST_DEBUG_FUNCPTR (gst_vaapiencode_open);
+  venc_class->close = GST_DEBUG_FUNCPTR (gst_vaapiencode_close);
+  venc_class->set_format = GST_DEBUG_FUNCPTR (gst_vaapiencode_set_format);
+  venc_class->reset = GST_DEBUG_FUNCPTR (gst_vaapiencode_reset);
+  venc_class->handle_frame = GST_DEBUG_FUNCPTR (gst_vaapiencode_handle_frame);
+  venc_class->finish = GST_DEBUG_FUNCPTR (gst_vaapiencode_finish);
+
+  venc_class->propose_allocation =
+      GST_DEBUG_FUNCPTR (gst_vaapiencode_propose_allocation);
+
+  klass->allocate_buffer = gst_vaapiencode_default_allocate_buffer;
+
+  /* Registering debug symbols for function pointers */
+  GST_DEBUG_REGISTER_FUNCPTR (gst_vaapiencode_get_caps);
+  GST_DEBUG_REGISTER_FUNCPTR (gst_vaapiencode_query);
+}

gst/vaapi/gstvaapiencode.h

@@ -0,0 +1,100 @@
+/*
+ *  gstvaapiencode.h - VA-API video encoder
+ *
+ *  Copyright (C) 2013 Intel Corporation
+ *
+ *  This library is free software; you can redistribute it and/or
+ *  modify it under the terms of the GNU Lesser General Public License
+ *  as published by the Free Software Foundation; either version 2.1
+ *  of the License, or (at your option) any later version.
+ *
+ *  This library is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ *  Lesser General Public License for more details.
+ *
+ *  You should have received a copy of the GNU Lesser General Public
+ *  License along with this library; if not, write to the Free
+ *  Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
+ *  Boston, MA 02110-1301 USA
+ */
+
+#ifndef GST_VAAPIENCODE_H
+#define GST_VAAPIENCODE_H
+
+#include <gst/gst.h>
+#include <gst/video/gstvideoencoder.h>
+#include <gst/vaapi/gstvaapiencoder.h>
+#include "gst/vaapi/gstvaapiencoder_objects.h"
+
+G_BEGIN_DECLS
+
+#define GST_TYPE_VAAPIENCODE \
+    (gst_vaapiencode_get_type ())
+
+#define GST_IS_VAAPIENCODE(obj) \
+    (G_TYPE_CHECK_INSTANCE_TYPE ((obj), GST_TYPE_VAAPIENCODE))
+
+#define GST_IS_VAAPIENCODE_CLASS(klass) \
+    (G_TYPE_CHECK_CLASS_TYPE ((klass), GST_TYPE_VAAPIENCODE))
+
+#define GST_VAAPIENCODE_GET_CLASS(obj)                  \
+    (G_TYPE_INSTANCE_GET_CLASS ((obj),                  \
+                                GST_TYPE_VAAPIENCODE,   \
+                                GstVaapiEncodeClass))
+
+#define GST_VAAPIENCODE(obj)                            \
+    (G_TYPE_CHECK_INSTANCE_CAST ((obj),                 \
+                                 GST_TYPE_VAAPIENCODE,  \
+                                 GstVaapiEncode))
+
+#define GST_VAAPIENCODE_CLASS(klass)                    \
+    (G_TYPE_CHECK_CLASS_CAST ((klass),                  \
+                              GST_TYPE_VAAPIENCODE,     \
+                              GstVaapiEncodeClass))
+
+typedef struct _GstVaapiEncode GstVaapiEncode;
+typedef struct _GstVaapiEncodeClass GstVaapiEncodeClass;
+
+struct _GstVaapiEncode
+{
+  /*< private > */
+  GstVideoEncoder parent_instance;
+
+  GstPad *sinkpad;
+  GstCaps *sinkpad_caps;
+  GstPadQueryFunction sinkpad_query;
+  GstVideoInfo sink_video_info;
+
+  GstPad *srcpad;
+  GstCaps *srcpad_caps;
+  GstPadQueryFunction srcpad_query;
+
+  GstVaapiDisplay *display;
+  GstVaapiEncoder *encoder;
+
+  GstBufferPool *video_buffer_pool;
+  guint video_buffer_size;
+
+  guint32 is_running:1;
+  guint32 out_caps_done:1;
+};
+
+struct _GstVaapiEncodeClass
+{
+  /*< private > */
+  GstVideoEncoderClass parent_class;
+
+  GstVaapiEncoder *   (*create_encoder)    (GstVaapiEncode * encode,
+                                            GstVaapiDisplay * display);
+  GstFlowReturn       (*allocate_buffer)   (GstVaapiEncode * encode,
+                                            GstVaapiCodedBuffer * coded_buf,
+                                            GstBuffer ** outbuf_ptr);
+};
+
+GType
+gst_vaapiencode_get_type (void) G_GNUC_CONST;
+
+G_END_DECLS
+
+#endif /* GST_VAAPIENCODE_H */