/*
 * GStreamer
 * Copyright (c) 2010, Texas Instruments Incorporated
 *
 * 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
 * version 2.1 of the License.
 *
 * 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
 */

/**
 * SECTION:element-ducatih264dec
 *
 * FIXME:Describe ducatih264dec here.
 *
 * <refsect2>
 * <title>Example launch line</title>
 * |[
 * gst-launch -v -m fakesrc ! ducatih264dec ! fakesink silent=TRUE
 * ]|
 * </refsect2>
 */

#ifdef HAVE_CONFIG_H
#  include <config.h>
#endif

#include "gstducatih264dec.h"


#define GST_BUFFER_FLAG_B_FRAME (GST_BUFFER_FLAG_LAST << 0)
#define PADX  32
#define PADY  24


GST_BOILERPLATE (GstDucatiH264Dec, gst_ducati_h264dec, GstDucatiVidDec,
    GST_TYPE_DUCATIVIDDEC);

static GstStaticPadTemplate sink_factory = GST_STATIC_PAD_TEMPLATE ("sink",
    GST_PAD_SINK,
    GST_PAD_ALWAYS,
    GST_STATIC_CAPS ("video/x-h264, "
        "stream-format = byte-stream, "   /* only byte-stream */
        "align = au, "          /* only entire frames */
        "width = (int)[ 16, 2048 ], "
        "height = (int)[ 16, 2048 ], "
        "framerate = (fraction)[ 0, max ],"
        "profile = (string){constrained-baseline, baseline, main, extended};"
        "video/x-h264, "
        "stream-format = byte-stream, "   /* only byte-stream */
        "align = au, "          /* only entire frames */
        "width = (int)[ 16, 2048 ], "
        "height = (int)[ 16, 2048 ], "
        "framerate = (fraction)[ 0, max ],"
        "profile = (string) {high, high-10-intra, high-10, high-4:2:2-intra, "
        "high-4:2:2, high-4:4:4-intra, high-4:4:4, cavlc-4:4:4-intra}, "
        "level = (string) {1, 1b, 1.1, 1.2, 1.3, 2, 2.1, 2.2, 3, 3.1, 3.2, 4, 4.1, 4.2};"
        )
    );

/* GstDucatiVidDec vmethod implementations */

static void
gst_ducati_h264dec_update_buffer_size (GstDucatiVidDec * self)
{
  gint w = self->width;
  gint h = self->height;

  /* calculate output buffer parameters: */
  self->padded_width = ALIGN2 (w + (2 * PADX), 7);
  self->padded_height = h + 4 * PADY;
  self->min_buffers = MIN (16, 32768 / ((w / 16) * (h / 16))) + 3;
}

static gboolean
gst_ducati_h264dec_allocate_params (GstDucatiVidDec * self, gint params_sz,
    gint dynparams_sz, gint status_sz, gint inargs_sz, gint outargs_sz)
{
  gboolean ret = parent_class->allocate_params (self,
      sizeof (IH264VDEC_Params), sizeof (IH264VDEC_DynamicParams),
      sizeof (IH264VDEC_Status), sizeof (IH264VDEC_InArgs),
      sizeof (IH264VDEC_OutArgs));

  if (ret) {
    IH264VDEC_Params *params = (IH264VDEC_Params *) self->params;
    self->params->displayDelay = IVIDDEC3_DISPLAY_DELAY_1;
    params->maxNumRefFrames = IH264VDEC_NUM_REFFRAMES_AUTO;
    params->pConstantMemory = 0;
    params->presetLevelIdc = IH264VDEC_LEVEL41;
    params->errConcealmentMode = IH264VDEC_APPLY_CONCEALMENT;
    params->temporalDirModePred = TRUE;
  }

  return ret;
}

static gint
gst_ducati_h264dec_handle_error (GstDucatiVidDec * self, gint ret,
    gint extended_error, gint status_extended_error)
{
  if (extended_error & 0x00000001) {
    /* No valid slice. This seems to be bad enough that it's better to flush and
     * skip to the next keyframe.
     */
    gst_ducati_viddec_codec_flush (self, FALSE);
  }

  ret = parent_class->handle_error (self, ret, extended_error,
      status_extended_error);

  return ret;
}

static gboolean
gst_ducati_h264dec_query (GstDucatiVidDec * vdec, GstPad * pad,
    GstQuery * query, gboolean * forward)
{
  GstDucatiH264Dec * self = GST_DUCATIH264DEC (vdec);
  gboolean res = TRUE;

  switch (GST_QUERY_TYPE (query)) {
    case GST_QUERY_LATENCY:
    {
      gboolean live;
      GstClockTime min, max, latency;

      if (vdec->fps_d == 0) {
        GST_INFO_OBJECT (self, "not ready to report latency");
        res = FALSE;
        break;
      }

      gst_query_parse_latency (query, &live, &min, &max);
      if (vdec->fps_n != 0)
        latency = gst_util_uint64_scale (GST_SECOND,
            vdec->fps_d, vdec->fps_n);
      else
        latency = 0;

      if (min == GST_CLOCK_TIME_NONE)
        min = latency;
      else
        min += latency;

      if (max != GST_CLOCK_TIME_NONE)
        max += latency;

      GST_INFO_OBJECT (self, "latency %"GST_TIME_FORMAT " ours %"GST_TIME_FORMAT,
          GST_TIME_ARGS (min), GST_TIME_ARGS (latency));
      gst_query_set_latency (query, live, min, max);
      break;
    }
    default:
      break;
  }

  if (res)
    res = parent_class->query (vdec, pad, query, forward);

  return res;
}

static gboolean
gst_ducati_h264dec_drop_frame (GstDucatiVidDec * self, GstBuffer * buf,
    gint64 diff)
{
  gboolean is_bframe = GST_BUFFER_FLAG_IS_SET (buf,
      GST_BUFFER_FLAG_B_FRAME);

  if (diff >= 0 && is_bframe)
    return TRUE;

  return FALSE;
}

/* GObject vmethod implementations */

static void
gst_ducati_h264dec_base_init (gpointer gclass)
{
  GstElementClass *element_class = GST_ELEMENT_CLASS (gclass);

  gst_element_class_set_details_simple (element_class,
      "DucatiH264Dec",
      "Codec/Decoder/Video",
      "Decodes video in H.264/bytestream format with ducati",
      "Rob Clark <rob@ti.com>");

  gst_element_class_add_pad_template (element_class,
      gst_static_pad_template_get (&sink_factory));
}

static void
gst_ducati_h264dec_class_init (GstDucatiH264DecClass * klass)
{
  GstDucatiVidDecClass *bclass = GST_DUCATIVIDDEC_CLASS (klass);
  bclass->codec_name = "ivahd_h264dec";
  bclass->update_buffer_size =
      GST_DEBUG_FUNCPTR (gst_ducati_h264dec_update_buffer_size);
  bclass->allocate_params =
      GST_DEBUG_FUNCPTR (gst_ducati_h264dec_allocate_params);
  bclass->handle_error = GST_DEBUG_FUNCPTR (gst_ducati_h264dec_handle_error);
  bclass->drop_frame = GST_DEBUG_FUNCPTR (gst_ducati_h264dec_drop_frame);
  bclass->query = GST_DEBUG_FUNCPTR (gst_ducati_h264dec_query);
}

static void
gst_ducati_h264dec_init (GstDucatiH264Dec * self,
    GstDucatiH264DecClass * gclass)
{
}