From 6ae9fdf827e93f1843c846f7daa5e23831d6fc19 Mon Sep 17 00:00:00 2001
From: Paul Kocialkowski <contact@paulk.fr>
Date: Tue, 1 Jul 2014 18:40:54 +0200
Subject: camera: Handle preview size or format change

Signed-off-by: Paul Kocialkowski <contact@paulk.fr>
---
 camera/smdk4x12_camera.c | 53 ++++++++++++++++++++++++++++++++----------------
 camera/smdk4x12_camera.h |  1 +
 camera/smdk4x12_utils.c  | 16 +++++++++++++++
 3 files changed, 53 insertions(+), 17 deletions(-)

diff --git a/camera/smdk4x12_camera.c b/camera/smdk4x12_camera.c
index 19aacdf..8cb5cea 100644
--- a/camera/smdk4x12_camera.c
+++ b/camera/smdk4x12_camera.c
@@ -2278,6 +2278,12 @@ int smdk4x12_camera_preview_callback(struct smdk4x12_camera *smdk4x12_camera,
 		return 0;
 	}
 
+	if (smdk4x12_camera->preview_listener->width != smdk4x12_camera->preview_width || smdk4x12_camera->preview_listener->height != smdk4x12_camera->preview_height || smdk4x12_camera->preview_listener->format != smdk4x12_camera->preview_format) {
+		ALOGD("%s: Waiting for preview listener update", __func__);
+		pthread_mutex_unlock(&smdk4x12_camera->preview_lock_mutex);
+		return 0;
+	}
+
 	smdk4x12_camera->preview_listener->busy = 1;
 
 	width = smdk4x12_camera->preview_width;
@@ -2450,6 +2456,8 @@ complete:
 void *smdk4x12_camera_preview_thread(void *data)
 {
 	struct smdk4x12_camera *smdk4x12_camera;
+	struct smdk4x12_camera_capture_listener *listener;
+	int gralloc_format;
 	int rc;
 
 	if (data == NULL)
@@ -2479,6 +2487,33 @@ void *smdk4x12_camera_preview_thread(void *data)
 			}
 		}
 
+		if (smdk4x12_camera->preview_listener->width != smdk4x12_camera->preview_width || smdk4x12_camera->preview_listener->height != smdk4x12_camera->preview_height || smdk4x12_camera->preview_listener->format != smdk4x12_camera->preview_format) {
+			if (smdk4x12_camera->preview_output_enabled)
+				smdk4x12_camera_preview_output_stop(smdk4x12_camera);
+
+			smdk4x12_camera_capture_listener_unregister(smdk4x12_camera, smdk4x12_camera->preview_listener);
+
+			smdk4x12_camera->preview_listener = NULL;
+
+			listener = smdk4x12_camera_capture_listener_register(smdk4x12_camera, smdk4x12_camera->preview_width, smdk4x12_camera->preview_height, smdk4x12_camera->preview_format, smdk4x12_camera_preview_callback);
+			if (listener == NULL) {
+				ALOGE("%s: Unable to register preview capture listener", __func__);
+				pthread_mutex_unlock(&smdk4x12_camera->preview_mutex);
+				break;
+			}
+
+			smdk4x12_camera->preview_listener = listener;
+
+			gralloc_format = smdk4x12_gralloc_format(smdk4x12_camera->preview_format);
+
+			rc = smdk4x12_camera->preview_window->set_buffers_geometry(smdk4x12_camera->preview_window, smdk4x12_camera->preview_width, smdk4x12_camera->preview_height, gralloc_format);
+			if (rc) {
+				ALOGE("%s: Unable to set buffers geometry", __func__);
+				pthread_mutex_unlock(&smdk4x12_camera->preview_mutex);
+				break;
+			}
+		}
+
 		pthread_mutex_unlock(&smdk4x12_camera->preview_mutex);
 	}
 
@@ -3933,23 +3968,7 @@ int smdk4x12_camera_set_preview_window(struct camera_device *device,
 	height = smdk4x12_camera->preview_height;
 	format = smdk4x12_camera->preview_format;
 
-	switch (format) {
-		case V4L2_PIX_FMT_NV21:
-			gralloc_format = HAL_PIXEL_FORMAT_YCrCb_420_SP;
-			break;
-		case V4L2_PIX_FMT_YUV420:
-			gralloc_format = HAL_PIXEL_FORMAT_YV12;
-			break;
-		case V4L2_PIX_FMT_RGB565:
-			gralloc_format = HAL_PIXEL_FORMAT_RGB_565;
-			break;
-		case V4L2_PIX_FMT_RGB32:
-			gralloc_format = HAL_PIXEL_FORMAT_RGBX_8888;
-			break;
-		default:
-			gralloc_format = HAL_PIXEL_FORMAT_YCrCb_420_SP;
-			break;
-	}
+	gralloc_format = smdk4x12_gralloc_format(format);
 
 	rc = w->set_buffers_geometry(w, width, height, gralloc_format);
 	if (rc) {
diff --git a/camera/smdk4x12_camera.h b/camera/smdk4x12_camera.h
index b264f39..d1a3924 100644
--- a/camera/smdk4x12_camera.h
+++ b/camera/smdk4x12_camera.h
@@ -574,6 +574,7 @@ void list_head_remove(struct list_head *list);
 
 int smdk4x12_camera_buffer_length(int width, int height, int format);
 void smdk4x12_camera_yuv_planes(int width, int height, int format, int address, int *address_y, int *address_cb, int *address_cr);
+int smdk4x12_gralloc_format(int format);
 
 /*
  * V4L2
diff --git a/camera/smdk4x12_utils.c b/camera/smdk4x12_utils.c
index 7f8fc40..90d2167 100644
--- a/camera/smdk4x12_utils.c
+++ b/camera/smdk4x12_utils.c
@@ -156,3 +156,19 @@ void smdk4x12_camera_yuv_planes(int width, int height, int format, int address,
 			break;
 	}
 }
+
+int smdk4x12_gralloc_format(int format)
+{
+	switch (format) {
+		case V4L2_PIX_FMT_NV21:
+			return HAL_PIXEL_FORMAT_YCrCb_420_SP;
+		case V4L2_PIX_FMT_YUV420:
+			return HAL_PIXEL_FORMAT_YV12;
+		case V4L2_PIX_FMT_RGB565:
+			return HAL_PIXEL_FORMAT_RGB_565;
+		case V4L2_PIX_FMT_RGB32:
+			return HAL_PIXEL_FORMAT_RGBX_8888;
+		default:
+			return HAL_PIXEL_FORMAT_YCrCb_420_SP;
+	}
+}
-- 
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