/* GStreamer

 * Copyright (C) <2005> Julien Moutte <julien@moutte.net>

 *

 * This library is free software; you can redistribute it and/or

 * modify it under the terms of the GNU Library General Public

 * License as published by the Free Software Foundation; either

 * version 2 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

 * Library General Public License for more details.

 *

 * You should have received a copy of the GNU Library General Public

 * License along with this library; if not, write to the

 * Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,

 * Boston, MA 02110-1301, USA.

 */

#ifdef HAVE_CONFIG_H

#include "config.h"

#endif

/* Object header */

#include "xvimagepool.h"

#include "xvimageallocator.h"

/* Debugging category */

#include <gst/gstinfo.h>

/* Helper functions */

#include <gst/video/video.h>

#include <gst/video/gstvideometa.h>

#include <gst/video/gstvideopool.h>

GST_DEBUG_CATEGORY_EXTERN (gst_debug_xv_image_pool);

#define GST_CAT_DEFAULT gst_debug_xv_image_pool

/* bufferpool */

static void gst_xvimage_buffer_pool_finalize (GObject * object);

#define gst_xvimage_buffer_pool_parent_class parent_class

G_DEFINE_TYPE (GstXvImageBufferPool, gst_xvimage_buffer_pool,

    GST_TYPE_BUFFER_POOL);

static const gchar **

xvimage_buffer_pool_get_options (GstBufferPool * pool)

{

  static const gchar *options[] = { GST_BUFFER_POOL_OPTION_VIDEO_META,

    GST_BUFFER_POOL_OPTION_VIDEO_ALIGNMENT, NULL

  };

  return options;

}

static gboolean

xvimage_buffer_pool_set_config (GstBufferPool * pool, GstStructure * config)

{

  GstXvImageBufferPool *xvpool = GST_XVIMAGE_BUFFER_POOL_CAST (pool);

  GstVideoInfo info;

  GstCaps *caps;

  guint size, min_buffers, max_buffers;

  GstXvContext *context;

  if (!gst_buffer_pool_config_get_params (config, &caps, &size, &min_buffers,

          &max_buffers))

    goto wrong_config;

  if (caps == NULL)

    goto no_caps;

  /* now parse the caps from the config */

  if (!gst_video_info_from_caps (&info, caps))

    goto wrong_caps;

  GST_LOG_OBJECT (pool, "%dx%d, caps %" GST_PTR_FORMAT, info.width, info.height,

      caps);

  context = gst_xvimage_allocator_peek_context (xvpool->allocator);

  xvpool->im_format = gst_xvcontext_get_format_from_info (context, &info;;

  if (xvpool->im_format == -1)

    goto unknown_format;

  if (xvpool->caps)

    gst_caps_unref (xvpool->caps);

  xvpool->caps = gst_caps_ref (caps);

  /* enable metadata based on config of the pool */

  xvpool->add_metavideo =

      gst_buffer_pool_config_has_option (config,

      GST_BUFFER_POOL_OPTION_VIDEO_META);

  /* parse extra alignment info */

  xvpool->need_alignment = gst_buffer_pool_config_has_option (config,

      GST_BUFFER_POOL_OPTION_VIDEO_ALIGNMENT);

  if (xvpool->need_alignment) {

    gst_buffer_pool_config_get_video_alignment (config, &xvpool->align);

    GST_LOG_OBJECT (pool, "padding %u-%ux%u-%u", xvpool->align.padding_top,

        xvpool->align.padding_left, xvpool->align.padding_left,

        xvpool->align.padding_bottom);

    /* do padding and alignment */

    gst_video_info_align (&info, &xvpool->align);

    gst_buffer_pool_config_set_video_alignment (config, &xvpool->align);

    /* we need the video metadata too now */

    xvpool->add_metavideo = TRUE;

  } else {

    gst_video_alignment_reset (&xvpool->align);

  }

  /* add the padding */

  xvpool->padded_width =

      GST_VIDEO_INFO_WIDTH (&info) + xvpool->align.padding_left +

      xvpool->align.padding_right;

  xvpool->padded_height =

      GST_VIDEO_INFO_HEIGHT (&info) + xvpool->align.padding_top +

      xvpool->align.padding_bottom;

  xvpool->info = info;

  xvpool->crop.x = xvpool->align.padding_left;

  xvpool->crop.y = xvpool->align.padding_top;

  xvpool->crop.w = xvpool->info.width;

  xvpool->crop.h = xvpool->info.height;

  gst_buffer_pool_config_set_params (config, caps, info.size, min_buffers,

      max_buffers);

  return GST_BUFFER_POOL_CLASS (parent_class)->set_config (pool, config);

  /* ERRORS */

wrong_config:

  {

    GST_WARNING_OBJECT (pool, "invalid config");

    return FALSE;

  }

no_caps:

  {

    GST_WARNING_OBJECT (pool, "no caps in config");

    return FALSE;

  }

wrong_caps:

  {

    GST_WARNING_OBJECT (pool,

        "failed getting geometry from caps %" GST_PTR_FORMAT, caps);

    return FALSE;

  }

unknown_format:

  {

    GST_WARNING_OBJECT (pool, "failed to get format from caps %"

        GST_PTR_FORMAT, caps);

    return FALSE;

  }

}

/* This function handles GstXImageBuffer creation depending on XShm availability */

static GstFlowReturn

xvimage_buffer_pool_alloc (GstBufferPool * pool, GstBuffer ** buffer,

    GstBufferPoolAcquireParams * params)

{

  GstXvImageBufferPool *xvpool = GST_XVIMAGE_BUFFER_POOL_CAST (pool);

  GstVideoInfo *info;

  GstBuffer *xvimage;

  GstMemory *mem;

  GError *err = NULL;

  info = &xvpool->info;

  xvimage = gst_buffer_new ();

  mem = gst_xvimage_allocator_alloc (xvpool->allocator, xvpool->im_format,

      info, xvpool->padded_width, xvpool->padded_height, &xvpool->crop, &err;;

  if (mem == NULL) {

    gst_buffer_unref (xvimage);

    goto no_buffer;

  }

  gst_buffer_append_memory (xvimage, mem);

  if (xvpool->add_metavideo) {

    GST_DEBUG_OBJECT (pool, "adding GstVideoMeta");

    gst_buffer_add_video_meta_full (xvimage, GST_VIDEO_FRAME_FLAG_NONE,

        GST_VIDEO_INFO_FORMAT (info), GST_VIDEO_INFO_WIDTH (info),

        GST_VIDEO_INFO_HEIGHT (info), GST_VIDEO_INFO_N_PLANES (info),

        info->offset, info->stride);

  }

  *buffer = xvimage;

  return GST_FLOW_OK;

  /* ERROR */

no_buffer:

  {

    GST_WARNING_OBJECT (pool, "can't create image: %s", err->message);

    g_clear_error (&err;;

    return GST_FLOW_ERROR;

  }

}

GstBufferPool *

gst_xvimage_buffer_pool_new (GstXvImageAllocator * allocator)

{

  GstXvImageBufferPool *pool;

  pool = g_object_new (GST_TYPE_XVIMAGE_BUFFER_POOL, NULL);

  gst_object_ref_sink (pool);

  pool->allocator = gst_object_ref (allocator);

  GST_LOG_OBJECT (pool, "new XvImage buffer pool %p", pool);

  return GST_BUFFER_POOL_CAST (pool);

}

static void

gst_xvimage_buffer_pool_class_init (GstXvImageBufferPoolClass * klass)

{

  GObjectClass *gobject_class = (GObjectClass *) klass;

  GstBufferPoolClass *gstbufferpool_class = (GstBufferPoolClass *) klass;

  gobject_class->finalize = gst_xvimage_buffer_pool_finalize;

  gstbufferpool_class->get_options = xvimage_buffer_pool_get_options;

  gstbufferpool_class->set_config = xvimage_buffer_pool_set_config;

  gstbufferpool_class->alloc_buffer = xvimage_buffer_pool_alloc;

}

static void

gst_xvimage_buffer_pool_init (GstXvImageBufferPool * pool)

{

  /* nothing to do here */

}

static void

gst_xvimage_buffer_pool_finalize (GObject * object)

{

  GstXvImageBufferPool *pool = GST_XVIMAGE_BUFFER_POOL_CAST (object);

  GST_LOG_OBJECT (pool, "finalize XvImage buffer pool %p", pool);

  if (pool->caps)

    gst_caps_unref (pool->caps);

  if (pool->allocator)

    gst_object_unref (pool->allocator);

  G_OBJECT_CLASS (gst_xvimage_buffer_pool_parent_class)->finalize (object);

}