/* GStreamer Progress Report Element
 * Copyright (C) <1999> Erik Walthinsen <omega@cse.ogi.edu>
 * Copyright (C) <2003> David Schleef <ds@schleef.org>
 * Copyright (C) <2004> Jan Schmidt <thaytan@mad.scientist.com>
 * Copyright (C) <2006> Tim-Philipp Müller <tim centricular 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., 59 Temple Place - Suite 330,
 * Boston, MA 02111-1307, USA.
 */

/**
 * SECTION:element-progressreport
 *
 * The progressreport element can be put into a pipeline to report progress,
 * which is done by doing upstream duration and position queries in regular
 * (real-time) intervals. Both the interval and the prefered query format
 * can be specified via the #GstProgressReport:update-freq and the
 * #GstProgressReport:format property.
 *
 * Element messages containing a "progress" structure are posted on the bus
 * whenever progress has been queried (since gst-plugins-good 0.10.6 only).
 *
 * Since the element was originally designed for debugging purposes, it will
 * by default also print information about the current progress to the
 * terminal. This can be prevented by setting the #GstProgressReport:silent
 * property to %TRUE.
 *
 * This element is most useful in transcoding pipelines or other situations
 * where just querying the pipeline might not lead to the wanted result. For
 * progress in TIME format, the element is best placed in a 'raw stream'
 * section of the pipeline (or after any demuxers/decoders/parsers).
 *
 * Three more things should be pointed out: firstly, the element will only
 * query progress when data flow happens. If data flow is stalled for some
 * reason, no progress messages will be posted. Secondly, there are other
 * elements (like qtdemux, for example) that may also post "progress" element
 * messages on the bus. Applications should check the source of any element
 * messages they receive, if needed. Finally, applications should not take
 * action on receiving notification of progress being 100%, they should only
 * take action when they receive an EOS message (since the progress reported
 * is in reference to an internal point of a pipeline and not the pipeline as
 * a whole).
 *
 * <refsect2>
 * <title>Example launch line</title>
 * |[
 * gst-launch -m filesrc location=foo.ogg ! decodebin ! progressreport update-freq=1 ! audioconvert ! audioresample ! autoaudiosink
 * ]| This shows a progress query where a duration is available.
 * |[
 * gst-launch -m audiotestsrc ! progressreport update-freq=1 ! audioconvert ! autoaudiosink
 * ]| This shows a progress query where no duration is available.
 * </refsect2>
 */

#ifdef HAVE_CONFIG_H
#include "config.h"
#endif

#include <gst/gst.h>
#include <string.h>
#include <math.h>
#include <time.h>

#include "progressreport.h"


enum
{
  ARG_0,
  ARG_UPDATE_FREQ,
  ARG_SILENT,
  ARG_DO_QUERY,
  ARG_FORMAT
};

GstStaticPadTemplate progress_report_src_template =
GST_STATIC_PAD_TEMPLATE ("src",
    GST_PAD_SRC,
    GST_PAD_ALWAYS,
    GST_STATIC_CAPS_ANY);

GstStaticPadTemplate progress_report_sink_template =
GST_STATIC_PAD_TEMPLATE ("sink",
    GST_PAD_SINK,
    GST_PAD_ALWAYS,
    GST_STATIC_CAPS_ANY);

#define DEFAULT_UPDATE_FREQ  5
#define DEFAULT_SILENT       FALSE
#define DEFAULT_DO_QUERY     TRUE
#define DEFAULT_FORMAT       "auto"

static void gst_progress_report_set_property (GObject * object, guint prop_id,
    const GValue * value, GParamSpec * pspec);
static void gst_progress_report_get_property (GObject * object, guint prop_id,
    GValue * value, GParamSpec * pspec);

static gboolean gst_progress_report_event (GstBaseTransform * trans,
    GstEvent * event);
static GstFlowReturn gst_progress_report_transform_ip (GstBaseTransform * trans,
    GstBuffer * buf);

static gboolean gst_progress_report_start (GstBaseTransform * trans);
static gboolean gst_progress_report_stop (GstBaseTransform * trans);

#define gst_progress_report_parent_class parent_class
G_DEFINE_TYPE (GstProgressReport, gst_progress_report, GST_TYPE_BASE_TRANSFORM);

static void
gst_progress_report_finalize (GObject * obj)
{
  GstProgressReport *filter = GST_PROGRESS_REPORT (obj);

  g_free (filter->format);
  filter->format = NULL;

  G_OBJECT_CLASS (parent_class)->finalize (obj);
}

static void
gst_progress_report_class_init (GstProgressReportClass * g_class)
{
  GstBaseTransformClass *gstbasetrans_class;
  GstElementClass *element_class;
  GObjectClass *gobject_class;

  gobject_class = G_OBJECT_CLASS (g_class);
  element_class = GST_ELEMENT_CLASS (g_class);
  gstbasetrans_class = GST_BASE_TRANSFORM_CLASS (g_class);

  gobject_class->finalize = gst_progress_report_finalize;
  gobject_class->set_property = gst_progress_report_set_property;
  gobject_class->get_property = gst_progress_report_get_property;

  g_object_class_install_property (gobject_class,
      ARG_UPDATE_FREQ, g_param_spec_int ("update-freq", "Update Frequency",
          "Number of seconds between reports when data is flowing", 1, G_MAXINT,
          DEFAULT_UPDATE_FREQ, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));

  g_object_class_install_property (gobject_class,
      ARG_SILENT, g_param_spec_boolean ("silent",
          "Do not print output to stdout", "Do not print output to stdout",
          DEFAULT_SILENT, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));

  g_object_class_install_property (gobject_class,
      ARG_DO_QUERY, g_param_spec_boolean ("do-query",
          "Use a query instead of buffer metadata to determine stream position",
          "Use a query instead of buffer metadata to determine stream position",
          DEFAULT_DO_QUERY, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));

  g_object_class_install_property (gobject_class,
      ARG_FORMAT, g_param_spec_string ("format", "format",
          "Format to use for the querying", DEFAULT_FORMAT,
          G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));

  gst_element_class_add_pad_template (element_class,
      gst_static_pad_template_get (&progress_report_sink_template));
  gst_element_class_add_pad_template (element_class,
      gst_static_pad_template_get (&progress_report_src_template));

  gst_element_class_set_details_simple (element_class, "Progress report",
      "Testing",
      "Periodically query and report on processing progress",
      "Jan Schmidt <thaytan@mad.scientist.com>");

  gstbasetrans_class->event = GST_DEBUG_FUNCPTR (gst_progress_report_event);
  gstbasetrans_class->transform_ip =
      GST_DEBUG_FUNCPTR (gst_progress_report_transform_ip);
  gstbasetrans_class->start = GST_DEBUG_FUNCPTR (gst_progress_report_start);
  gstbasetrans_class->stop = GST_DEBUG_FUNCPTR (gst_progress_report_stop);
}

static void
gst_progress_report_init (GstProgressReport * report)
{
  gst_base_transform_set_passthrough (GST_BASE_TRANSFORM (report), TRUE);

  report->update_freq = DEFAULT_UPDATE_FREQ;
  report->silent = DEFAULT_SILENT;
  report->do_query = DEFAULT_DO_QUERY;
  report->format = g_strdup (DEFAULT_FORMAT);
}

static void
gst_progress_report_post_progress (GstProgressReport * filter,
    GstFormat format, gint64 current, gint64 total)
{
  GstStructure *s = NULL;

  if (current >= 0 && total > 0) {
    gdouble perc;

    perc = gst_util_guint64_to_gdouble (current) * 100.0 /
        gst_util_guint64_to_gdouble (total);
    perc = CLAMP (perc, 0.0, 100.0);

    /* we provide a "percent" field of integer type to stay compatible
     * with qtdemux, but add a second "percent-double" field for those who
     * want more precision and are too lazy to calculate it themselves */
    s = gst_structure_new ("progress", "percent", G_TYPE_INT, (gint) perc,
        "percent-double", G_TYPE_DOUBLE, perc, "current", G_TYPE_INT64, current,
        "total", G_TYPE_INT64, total, NULL);
  } else if (current >= 0) {
    s = gst_structure_new ("progress", "current", G_TYPE_INT64, current, NULL);
  }

  if (s) {
    GST_LOG_OBJECT (filter, "posting progress message: %" GST_PTR_FORMAT, s);
    gst_structure_set (s, "format", GST_TYPE_FORMAT, format, NULL);
    /* can't post it right here because we're holding the object lock */
    filter->pending_msg = gst_message_new_element (GST_OBJECT_CAST (filter), s);
  }
}

static gboolean
gst_progress_report_do_query (GstProgressReport * filter, GstFormat format,
    gint hh, gint mm, gint ss, GstBuffer * buf)
{
  const gchar *format_name = NULL;
  GstPad *sink_pad;
  gint64 cur, total;

  sink_pad = GST_BASE_TRANSFORM (filter)->sinkpad;

  GST_LOG_OBJECT (filter, "querying using format %d (%s)", format,
      gst_format_get_name (format));

  if (filter->do_query || !buf) {
    GST_LOG_OBJECT (filter, "using upstream query");
    if (!gst_pad_query_peer_position (sink_pad, &format, &cur) ||
        !gst_pad_query_peer_duration (sink_pad, &format, &total)) {
      return FALSE;
    }
  } else {
    GstBaseTransform *base = GST_BASE_TRANSFORM (filter);

    GST_LOG_OBJECT (filter, "using buffer metadata");
    if (format == GST_FORMAT_TIME && base->have_newsegment &&
        base->segment.format == GST_FORMAT_TIME) {
      cur = gst_segment_to_stream_time (&base->segment, format,
          GST_BUFFER_TIMESTAMP (buf));
      total = base->segment.duration;
    } else {
      return FALSE;
    }
  }

  switch (format) {
    case GST_FORMAT_BYTES:
      format_name = "bytes";
      break;
    case GST_FORMAT_BUFFERS:
      format_name = "buffers";
      break;
    case GST_FORMAT_PERCENT:
      format_name = "percent";
      break;
    case GST_FORMAT_TIME:
      format_name = "seconds";
      cur /= GST_SECOND;
      total /= GST_SECOND;
      break;
    case GST_FORMAT_DEFAULT:{
      GstCaps *caps;

      format_name = "bogounits";
      caps = GST_PAD_CAPS (GST_BASE_TRANSFORM (filter)->sinkpad);
      if (caps && gst_caps_is_fixed (caps) && !gst_caps_is_any (caps)) {
        GstStructure *s = gst_caps_get_structure (caps, 0);
        const gchar *mime_type = gst_structure_get_name (s);

        if (g_str_has_prefix (mime_type, "video/") ||
            g_str_has_prefix (mime_type, "image/")) {
          format_name = "frames";
        } else if (g_str_has_prefix (mime_type, "audio/")) {
          format_name = "samples";
        }
      }
      break;
    }
    default:{
      const GstFormatDefinition *details;

      details = gst_format_get_details (format);
      if (details) {
        format_name = details->nick;
      } else {
        format_name = "unknown";
      }
      break;
    }
  }

  if (!filter->silent) {
    if (total > 0) {
      g_print ("%s (%02d:%02d:%02d): %" G_GINT64_FORMAT " / %"
          G_GINT64_FORMAT " %s (%4.1f %%)\n", GST_OBJECT_NAME (filter), hh,
          mm, ss, cur, total, format_name, (gdouble) cur / total * 100.0);
    } else {
      g_print ("%s (%02d:%02d:%02d): %" G_GINT64_FORMAT " %s\n",
          GST_OBJECT_NAME (filter), hh, mm, ss, cur, format_name);
    }
  }

  gst_progress_report_post_progress (filter, format, cur, total);
  return TRUE;
}

static void
gst_progress_report_report (GstProgressReport * filter, GTimeVal cur_time,
    GstBuffer * buf)
{
  GstFormat try_formats[] = { GST_FORMAT_TIME, GST_FORMAT_BYTES,
    GST_FORMAT_PERCENT, GST_FORMAT_BUFFERS,
    GST_FORMAT_DEFAULT
  };
  GstMessage *msg;
  GstFormat format = GST_FORMAT_UNDEFINED;
  gboolean done = FALSE;
  glong run_time;
  gint hh, mm, ss;

  run_time = cur_time.tv_sec - filter->start_time.tv_sec;

  hh = (run_time / 3600) % 100;
  mm = (run_time / 60) % 60;
  ss = (run_time % 60);

  GST_OBJECT_LOCK (filter);

  if (filter->format != NULL && strcmp (filter->format, "auto") != 0) {
    format = gst_format_get_by_nick (filter->format);
  }

  if (format != GST_FORMAT_UNDEFINED) {
    done = gst_progress_report_do_query (filter, format, hh, mm, ss, buf);
  } else {
    gint i;

    for (i = 0; i < G_N_ELEMENTS (try_formats); ++i) {
      done = gst_progress_report_do_query (filter, try_formats[i], hh, mm, ss,
          buf);
      if (done)
        break;
    }
  }

  if (!done && !filter->silent) {
    g_print ("%s (%2d:%2d:%2d): Could not query position and/or duration\n",
        GST_OBJECT_NAME (filter), hh, mm, ss);
  }

  msg = filter->pending_msg;
  filter->pending_msg = NULL;
  GST_OBJECT_UNLOCK (filter);

  if (msg) {
    gst_element_post_message (GST_ELEMENT_CAST (filter), msg);
  }
}

static gboolean
gst_progress_report_event (GstBaseTransform * trans, GstEvent * event)
{
  GstProgressReport *filter;

  filter = GST_PROGRESS_REPORT (trans);

  if (GST_EVENT_TYPE (event) == GST_EVENT_EOS) {
    GTimeVal cur_time;

    g_get_current_time (&cur_time);
    gst_progress_report_report (filter, cur_time, NULL);
  }
  return GST_BASE_TRANSFORM_CLASS (parent_class)->event (trans, event);
}

static GstFlowReturn
gst_progress_report_transform_ip (GstBaseTransform * trans, GstBuffer * buf)
{
  GstProgressReport *filter;
  gboolean need_update;
  GTimeVal cur_time;

  g_get_current_time (&cur_time);

  filter = GST_PROGRESS_REPORT (trans);

  /* Check if update_freq seconds have passed since the last update */
  GST_OBJECT_LOCK (filter);
  need_update =
      ((cur_time.tv_sec - filter->last_report.tv_sec) >= filter->update_freq);
  GST_OBJECT_UNLOCK (filter);

  if (need_update) {
    gst_progress_report_report (filter, cur_time, buf);
    GST_OBJECT_LOCK (filter);
    filter->last_report = cur_time;
    GST_OBJECT_UNLOCK (filter);
  }

  return GST_FLOW_OK;
}

static gboolean
gst_progress_report_start (GstBaseTransform * trans)
{
  GstProgressReport *filter;

  filter = GST_PROGRESS_REPORT (trans);

  g_get_current_time (&filter->last_report);
  filter->start_time = filter->last_report;

  return TRUE;
}

static gboolean
gst_progress_report_stop (GstBaseTransform * trans)
{
  /* anything we should be doing here? */
  return TRUE;
}

static void
gst_progress_report_set_property (GObject * object, guint prop_id,
    const GValue * value, GParamSpec * pspec)
{
  GstProgressReport *filter;

  filter = GST_PROGRESS_REPORT (object);

  switch (prop_id) {
    case ARG_UPDATE_FREQ:
      GST_OBJECT_LOCK (filter);
      filter->update_freq = g_value_get_int (value);
      GST_OBJECT_UNLOCK (filter);
      break;
    case ARG_SILENT:
      GST_OBJECT_LOCK (filter);
      filter->silent = g_value_get_boolean (value);
      GST_OBJECT_UNLOCK (filter);
      break;
    case ARG_DO_QUERY:
      GST_OBJECT_LOCK (filter);
      filter->do_query = g_value_get_boolean (value);
      GST_OBJECT_UNLOCK (filter);
      break;
    case ARG_FORMAT:
      GST_OBJECT_LOCK (filter);
      g_free (filter->format);
      filter->format = g_value_dup_string (value);
      if (filter->format == NULL)
        filter->format = g_strdup ("auto");
      GST_OBJECT_UNLOCK (filter);
      break;
    default:
      break;
  }
}

static void
gst_progress_report_get_property (GObject * object, guint prop_id,
    GValue * value, GParamSpec * pspec)
{
  GstProgressReport *filter;

  filter = GST_PROGRESS_REPORT (object);

  switch (prop_id) {
    case ARG_UPDATE_FREQ:
      GST_OBJECT_LOCK (filter);
      g_value_set_int (value, filter->update_freq);
      GST_OBJECT_UNLOCK (filter);
      break;
    case ARG_SILENT:
      GST_OBJECT_LOCK (filter);
      g_value_set_boolean (value, filter->silent);
      GST_OBJECT_UNLOCK (filter);
      break;
    case ARG_DO_QUERY:
      GST_OBJECT_LOCK (filter);
      g_value_set_boolean (value, filter->do_query);
      GST_OBJECT_UNLOCK (filter);
      break;
    case ARG_FORMAT:
      GST_OBJECT_LOCK (filter);
      g_value_set_string (value, filter->format);
      GST_OBJECT_UNLOCK (filter);
      break;
    default:
      G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
      break;
  }
}