[aravis] buffer: add frame id accessor

[Emmanuel Pacaud <emmanuel src gnome org>]

commit b4f28377416d69b4f9e28b132a768197b32228f1
Author: Emmanuel Pacaud <emmanuel gnome org>
Date:   Sun Oct 19 21:11:31 2014 +0200

    buffer: add frame id accessor

 docs/reference/aravis/aravis-sections.txt |    7 ++++---
 src/arvbuffer.c                           |   26 +++++++++++++++++++++++---
 src/arvbuffer.h                           |    1 +
 3 files changed, 28 insertions(+), 6 deletions(-)
---
diff --git a/docs/reference/aravis/aravis-sections.txt b/docs/reference/aravis/aravis-sections.txt
index ac4fa0f..d2b8bed 100644
--- a/docs/reference/aravis/aravis-sections.txt
+++ b/docs/reference/aravis/aravis-sections.txt
@@ -89,15 +89,16 @@ arv_buffer_new_allocate
 arv_buffer_get_user_data
 arv_buffer_get_data
 arv_buffer_get_chunk_data
+arv_buffer_get_timestamp
+arv_buffer_get_frame_id
+arv_buffer_get_payload_type
+arv_buffer_get_status
 arv_buffer_get_image_height
 arv_buffer_get_image_pixel_format
 arv_buffer_get_image_region
-arv_buffer_get_timestamp
 arv_buffer_get_image_width
 arv_buffer_get_image_x
 arv_buffer_get_image_y
-arv_buffer_get_payload_type
-arv_buffer_get_status
 ARV_PIXEL_FORMAT_BIT_PER_PIXEL
 ARV_PIXEL_FORMAT_BAYER_BG_10
 ARV_PIXEL_FORMAT_BAYER_BG_12
diff --git a/src/arvbuffer.c b/src/arvbuffer.c
index 994aee9..34306b5 100644
--- a/src/arvbuffer.c
+++ b/src/arvbuffer.c
@@ -298,9 +298,9 @@ arv_buffer_get_payload_type (ArvBuffer *buffer)
  * arv_buffer_get_timestamp:
  * @buffer: a #ArvBuffer
  *
- * Gets the buffer camera timestamp, expressed as nanoseconds. Not all devices provide
- * reliable timestamp, which means sometimes its better to rely on the buffer
- * completion host local time (given by @g_get_realtime for example).
+ * Gets the buffer camera timestamp, expressed as nanoseconds. Not all devices
+ * provide reliable timestamp, which means sometimes its better to rely on the
+ * buffer completion host local time (given by @g_get_realtime for example).
  *
  * Returns: buffer timestamp, in nanoseconds.
  *
@@ -316,6 +316,26 @@ arv_buffer_get_timestamp (ArvBuffer *buffer)
 }
 
 /**
+ * arv_buffer_get_frame_id:
+ * @buffer: a #ArvBuffer
+ *
+ * Gets the buffer frame id. For GigEVision devices, valid values are in the
+ * 1..65535 range.
+ *
+ * Returns: frame id, 0 on error.
+ *
+ * Since: 0.4.0
+ */
+
+guint32
+arv_buffer_get_frame_id (ArvBuffer *buffer)
+{
+       g_return_val_if_fail (ARV_IS_BUFFER (buffer), 0);
+
+       return buffer->priv->frame_id;
+}
+
+/**
  * arv_buffer_get_image_region:
  * @buffer: a #ArvBuffer
  * @x: (allow-none): image x offset placeholder
diff --git a/src/arvbuffer.h b/src/arvbuffer.h
index d023540..f36b258 100644
--- a/src/arvbuffer.h
+++ b/src/arvbuffer.h
@@ -114,6 +114,7 @@ const void *                arv_buffer_get_user_data        (ArvBuffer *buffer);
 
 ArvBufferPayloadType   arv_buffer_get_payload_type     (ArvBuffer *buffer);
 guint64                        arv_buffer_get_timestamp        (ArvBuffer *buffer);
+guint32                arv_buffer_get_frame_id         (ArvBuffer *buffer);
 const void *           arv_buffer_get_data             (ArvBuffer *buffer, size_t *size);
 
 void                   arv_buffer_get_image_region             (ArvBuffer *buffer, gint *x, gint *y, gint 
*width, gint *height);