/*
 * Copyright (C) 2009 Luo Jinghua<sunmoon1997@gmail.com>
 *
 * PPStream plugin for xine
 *
 * xine is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * xine 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 General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110, USA
 *
 * pps input plugin
 */

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

#include <unistd.h>
#include <stdio.h>
#include <string.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <errno.h>

#define LOG_MODULE "input_pps"
#define LOG_VERBOSE
/*
#define LOG
*/

#include <xine/xine_internal.h>
#include <xine/xineutils.h>
#include <xine/input_plugin.h>

#include "pps-fixed.h"

#ifndef EXPORTED
#define EXPORTED
#endif

typedef struct {

  input_class_t     input_class;

  xine_t           *xine;
} pps_input_class_t;

typedef struct {
  input_plugin_t   input_plugin;

  int              fd;
  int              size;

  xine_stream_t   *stream;

  char            *mrl;

  off_t            curpos;
} pps_input_plugin_t;


static off_t pps_plugin_read (input_plugin_t *this_gen,
                              char *buf, off_t len) {
  pps_input_plugin_t *this = (pps_input_plugin_t *) this_gen;
  int               ret;

  lprintf ("pps_plugin_read: %"PRId64" bytes ...\n", len);

  while (1) {
    struct timeval tv;
    int error;

    tv.tv_sec = 0;
    tv.tv_usec = 500000;
    ret = ppsvod_read(this->fd, buf, len,
		      this->curpos, &tv);
    error = errno;
    if (ret >= 0)
      break;
    if (error != EAGAIN)
      return -1;
    usleep (5000);
  }

  if (ret > 0)
    this->curpos += ret;

  return ret;
}

static buf_element_t *pps_plugin_read_block (input_plugin_t *this_gen,
                                             fifo_buffer_t *fifo, off_t todo) {
  /*pps_input_plugin_t   *this = (pps_input_plugin_t *) this_gen; */
  buf_element_t        *buf = fifo->buffer_pool_alloc (fifo);
  int                   total_bytes;

  lprintf ("pps_plugin_read_block: %"PRId64" bytes...\n", todo);

  if (todo > buf->max_size)
    todo = buf->max_size;
  if (todo < 0) {
    buf->free_buffer (buf);
    return NULL;
  }

  buf->content = buf->mem;
  buf->type = BUF_DEMUX_BLOCK;

  total_bytes = pps_plugin_read (this_gen, (char*)buf->content, todo);

  if (total_bytes != todo) {
    buf->free_buffer (buf);
    return NULL;
  }

  buf->size = total_bytes;

  return buf;
}

static off_t pps_plugin_seek (input_plugin_t *this_gen, off_t offset, int origin) {

  pps_input_plugin_t *this = (pps_input_plugin_t *) this_gen;
  int ret;

  lprintf ("seek %"PRId64" bytes, origin %d\n", offset, origin);

  /* only realtive forward-seeking is implemented */

  if (origin == SEEK_CUR) {
    offset += this->curpos;
  } else if (origin == SEEK_END) {
    if (this->size == -1)
      return -1;
    offset = this->size - offset;
  }
  ret = ppsvod_seek (this->fd, offset);
  if (ret < 0) {
    return -1;
  }

  this->curpos = offset;
  return this->curpos;
}

static off_t pps_plugin_get_length (input_plugin_t *this_gen) {

  pps_input_plugin_t   *this = (pps_input_plugin_t *) this_gen;

  if (this->size == -1)
    this->size = ppsvod_get_file_length(this->fd);
  return this->size;
}

static uint32_t pps_plugin_get_capabilities (input_plugin_t *this_gen) {
  return INPUT_CAP_SEEKABLE;
}

static uint32_t pps_plugin_get_blocksize (input_plugin_t *this_gen) {
  return 0;
}

static off_t pps_plugin_get_current_pos (input_plugin_t *this_gen){
  pps_input_plugin_t *this = (pps_input_plugin_t *) this_gen;

  /*
  printf ("current pos is %"PRId64"\n", this->curpos);
  */

  return this->curpos;
}

static int pps_plugin_event_callback (int index, pps_event event)
{
  return 0;
}

static void pps_plugin_dispose (input_plugin_t *this_gen) {
  pps_input_plugin_t *this = (pps_input_plugin_t *) this_gen;

  if (this->fd >= 0) {
    ppsvod_stop_item(this->fd);
    ppsvod_remove_item(this->fd);
    this->fd = -1;
  }

  if(this->mrl)
    free(this->mrl);

  ppsvod_destroy();

  free (this);
}

static const char* pps_plugin_get_mrl (input_plugin_t *this_gen) {
  pps_input_plugin_t *this = (pps_input_plugin_t *) this_gen;

  return this->mrl;
}

static int pps_plugin_get_optional_data (input_plugin_t *this_gen,
                                         void *data, int data_type) {
#if 0
  pps_input_plugin_t *this = (pps_input_plugin_t *) this_gen;

  switch (data_type) {
  case INPUT_OPTIONAL_DATA_PREVIEW:
    break;
  }
#endif

  return INPUT_OPTIONAL_UNSUPPORTED;
}

static int pps_plugin_open (input_plugin_t *this_gen) {
  pps_input_plugin_t *this = (pps_input_plugin_t *) this_gen;

  int ret;

  lprintf ("trying to open '%s'\n", this->mrl);

  if (ppsvod_create("ppstream", "demo", "ppsdemo001",
		    pps_plugin_event_callback) < 0) {
    lprintf ("Failed to initialize ppsvod.\n");
    return 0;
  }

  ret = ppsvod_add_item(this->mrl, 0);
  if (ret < 0) {
    lprintf ("Failed to open url.\n");

    ppsvod_destroy();
    return 0;
  }
  this->fd = ret;

  ret = ppsvod_play_item(this->fd, NULL);
  if (ret < 0) {
    lprintf ("Failed to play url.\n");

    ppsvod_remove_item(this->fd);
    ppsvod_destroy();
    return 0;
  }
  this->size = ppsvod_get_file_length(this->fd);

  return 1;
}

static input_plugin_t *pps_class_get_instance (input_class_t *cls_gen, xine_stream_t *stream,
				    const char *mrl) {

  /* pps_input_class_t  *cls = (pps_input_class_t *) cls_gen; */
  pps_input_plugin_t *this;

  if (strncasecmp (mrl, "pps://", 6) &&
      strncasecmp (mrl, "tvod://", 7))
    return NULL;

  this = calloc(1, sizeof (pps_input_plugin_t));

  this->stream  = stream;
  this->fd      = -1;
  this->mrl     = strdup (mrl);

  this->input_plugin.open              = pps_plugin_open;
  this->input_plugin.get_capabilities  = pps_plugin_get_capabilities;
  this->input_plugin.read              = pps_plugin_read;
  this->input_plugin.read_block        = pps_plugin_read_block;
  this->input_plugin.seek              = pps_plugin_seek;
  this->input_plugin.get_current_pos   = pps_plugin_get_current_pos;
  this->input_plugin.get_length        = pps_plugin_get_length;
  this->input_plugin.get_blocksize     = pps_plugin_get_blocksize;
  this->input_plugin.get_mrl           = pps_plugin_get_mrl;
  this->input_plugin.dispose           = pps_plugin_dispose;
  this->input_plugin.get_optional_data = pps_plugin_get_optional_data;
  this->input_plugin.input_class       = cls_gen;

  return &this->input_plugin;
}

/*
 * pps input plugin class stuff
 */

static const char *pps_class_get_description (input_class_t *this_gen) {
  return _("pps streaming input plugin");
}

static const char *pps_class_get_identifier (input_class_t *this_gen) {
  return "pps";
}

static void pps_class_dispose (input_class_t *this_gen) {
  pps_input_class_t  *this = (pps_input_class_t *) this_gen;

  free (this);
}

static void *init_class (xine_t *xine, void *data) {

  pps_input_class_t  *this;

  this = calloc(1, sizeof (pps_input_class_t));

  this->xine   = xine;

  this->input_class.get_instance       = pps_class_get_instance;
  this->input_class.get_identifier     = pps_class_get_identifier;
  this->input_class.get_description    = pps_class_get_description;
  this->input_class.get_dir            = NULL;
  this->input_class.get_autoplay_list  = NULL;
  this->input_class.dispose            = pps_class_dispose;
  this->input_class.eject_media        = NULL;

  return this;
}

/*
 * exported plugin catalog entry
 */

const plugin_info_t xine_plugin_info[] EXPORTED = {
  /* type, API, "name", version, special_info, init_function */
  { PLUGIN_INPUT, 17, "pps", XINE_VERSION_CODE, NULL, init_class },
  { PLUGIN_NONE, 0, "", 0, NULL, NULL }
};