/*
 *  Copyright (c) 2010 The WebM project authors. All Rights Reserved.
 *
 *  Use of this source code is governed by a BSD-style license
 *  that can be found in the LICENSE file in the root of the source
 *  tree. An additional intellectual property rights grant can be found
 *  in the file PATENTS.  All contributing project authors may
 *  be found in the AUTHORS file in the root of the source tree.
 */


#include "vp9/common/vp9_onyxc_int.h"
#if CONFIG_POSTPROC
#include "vp9/common/vp9_postproc.h"
#endif
#include "vp9/decoder/vp9_onyxd.h"
#include "vp9/decoder/vp9_onyxd_int.h"
#include "vpx_mem/vpx_mem.h"
#include "vp9/common/vp9_alloccommon.h"
#include "vp9/common/vp9_loopfilter.h"
#include "vp9/common/vp9_swapyv12buffer.h"
#include <stdio.h>
#include <assert.h>

#include "vp9/common/vp9_quant_common.h"
#include "vpx_scale/vpx_scale.h"
#include "vp9/common/vp9_systemdependent.h"
#include "vpx_ports/vpx_timer.h"
#include "vp9/decoder/vp9_decodframe.h"
#include "vp9/decoder/vp9_detokenize.h"
#include "./vpx_scale_rtcd.h"

static int get_free_fb(VP9_COMMON *cm);
static void ref_cnt_fb(int *buf, int *idx, int new_idx);

#define WRITE_RECON_BUFFER 0
#if WRITE_RECON_BUFFER == 1
static void recon_write_yuv_frame(char *name, YV12_BUFFER_CONFIG *s) {
  FILE *yuv_file = fopen((char *)name, "ab");
  uint8_t *src = s->y_buffer;
  int h = s->y_height;

  do {
    fwrite(src, s->y_width, 1,  yuv_file);
    src += s->y_stride;
  } while (--h);

  src = s->u_buffer;
  h = s->uv_height;

  do {
    fwrite(src, s->uv_width, 1,  yuv_file);
    src += s->uv_stride;
  } while (--h);

  src = s->v_buffer;
  h = s->uv_height;

  do {
    fwrite(src, s->uv_width, 1, yuv_file);
    src += s->uv_stride;
  } while (--h);

  fclose(yuv_file);
}
#endif
#if WRITE_RECON_BUFFER == 2
void write_dx_frame_to_file(YV12_BUFFER_CONFIG *frame, int this_frame) {

  // write the frame
  FILE *yframe;
  int i;
  char filename[255];

  sprintf(filename, "dx\\y%04d.raw", this_frame);
  yframe = fopen(filename, "wb");

  for (i = 0; i < frame->y_height; i++)
    fwrite(frame->y_buffer + i * frame->y_stride,
           frame->y_width, 1, yframe);

  fclose(yframe);
  sprintf(filename, "dx\\u%04d.raw", this_frame);
  yframe = fopen(filename, "wb");

  for (i = 0; i < frame->uv_height; i++)
    fwrite(frame->u_buffer + i * frame->uv_stride,
           frame->uv_width, 1, yframe);

  fclose(yframe);
  sprintf(filename, "dx\\v%04d.raw", this_frame);
  yframe = fopen(filename, "wb");

  for (i = 0; i < frame->uv_height; i++)
    fwrite(frame->v_buffer + i * frame->uv_stride,
           frame->uv_width, 1, yframe);

  fclose(yframe);
}
#endif

void vp9_initialize_dec(void) {
  static int init_done = 0;

  if (!init_done) {
    vp9_initialize_common();
    vp9_init_quant_tables();
    init_done = 1;
  }
}

VP9D_PTR vp9_create_decompressor(VP9D_CONFIG *oxcf) {
  VP9D_COMP *pbi = vpx_memalign(32, sizeof(VP9D_COMP));

  if (!pbi)
    return NULL;

  vpx_memset(pbi, 0, sizeof(VP9D_COMP));

  if (setjmp(pbi->common.error.jmp)) {
    pbi->common.error.setjmp = 0;
    vp9_remove_decompressor(pbi);
    return 0;
  }

  pbi->common.error.setjmp = 1;
  vp9_initialize_dec();

  vp9_create_common(&pbi->common);

  pbi->common.current_video_frame = 0;
  pbi->ready_for_new_data = 1;

  /* vp9_init_de_quantizer() is first called here. Add check in
   * frame_init_dequantizer() to avoid unnecessary calling of
   * vp9_init_de_quantizer() for every frame.
   */
  vp9_init_de_quantizer(pbi);

  vp9_loop_filter_init(&pbi->common);

  pbi->common.error.setjmp = 0;

  pbi->decoded_key_frame = 0;

  return (VP9D_PTR) pbi;
}

void vp9_remove_decompressor(VP9D_PTR ptr) {
  VP9D_COMP *pbi = (VP9D_COMP *) ptr;

  if (!pbi)
    return;

  // Delete sementation map
  if (pbi->common.last_frame_seg_map != 0)
    vpx_free(pbi->common.last_frame_seg_map);

  vp9_remove_common(&pbi->common);
  vpx_free(pbi->mbc);
  vpx_free(pbi);
}


vpx_codec_err_t vp9_get_reference_dec(VP9D_PTR ptr, VP9_REFFRAME ref_frame_flag,
                                      YV12_BUFFER_CONFIG *sd) {
  VP9D_COMP *pbi = (VP9D_COMP *) ptr;
  VP9_COMMON *cm = &pbi->common;
  int ref_fb_idx;

  if (ref_frame_flag == VP9_LAST_FLAG)
    ref_fb_idx = cm->lst_fb_idx;
  else if (ref_frame_flag == VP9_GOLD_FLAG)
    ref_fb_idx = cm->gld_fb_idx;
  else if (ref_frame_flag == VP9_ALT_FLAG)
    ref_fb_idx = cm->alt_fb_idx;
  else {
    vpx_internal_error(&pbi->common.error, VPX_CODEC_ERROR,
                       "Invalid reference frame");
    return pbi->common.error.error_code;
  }

  if (cm->yv12_fb[ref_fb_idx].y_height != sd->y_height ||
      cm->yv12_fb[ref_fb_idx].y_width != sd->y_width ||
      cm->yv12_fb[ref_fb_idx].uv_height != sd->uv_height ||
      cm->yv12_fb[ref_fb_idx].uv_width != sd->uv_width) {
    vpx_internal_error(&pbi->common.error, VPX_CODEC_ERROR,
                       "Incorrect buffer dimensions");
  } else
    vp8_yv12_copy_frame(&cm->yv12_fb[ref_fb_idx], sd);

  return pbi->common.error.error_code;
}


vpx_codec_err_t vp9_set_reference_dec(VP9D_PTR ptr, VP9_REFFRAME ref_frame_flag,
                                      YV12_BUFFER_CONFIG *sd) {
  VP9D_COMP *pbi = (VP9D_COMP *) ptr;
  VP9_COMMON *cm = &pbi->common;
  int *ref_fb_ptr = NULL;
  int free_fb;

  if (ref_frame_flag == VP9_LAST_FLAG)
    ref_fb_ptr = &cm->lst_fb_idx;
  else if (ref_frame_flag == VP9_GOLD_FLAG)
    ref_fb_ptr = &cm->gld_fb_idx;
  else if (ref_frame_flag == VP9_ALT_FLAG)
    ref_fb_ptr = &cm->alt_fb_idx;
  else {
    vpx_internal_error(&pbi->common.error, VPX_CODEC_ERROR,
                       "Invalid reference frame");
    return pbi->common.error.error_code;
  }

  if (cm->yv12_fb[*ref_fb_ptr].y_height != sd->y_height ||
      cm->yv12_fb[*ref_fb_ptr].y_width != sd->y_width ||
      cm->yv12_fb[*ref_fb_ptr].uv_height != sd->uv_height ||
      cm->yv12_fb[*ref_fb_ptr].uv_width != sd->uv_width) {
    vpx_internal_error(&pbi->common.error, VPX_CODEC_ERROR,
                       "Incorrect buffer dimensions");
  } else {
    /* Find an empty frame buffer. */
    free_fb = get_free_fb(cm);
    /* Decrease fb_idx_ref_cnt since it will be increased again in
     * ref_cnt_fb() below. */
    cm->fb_idx_ref_cnt[free_fb]--;

    /* Manage the reference counters and copy image. */
    ref_cnt_fb(cm->fb_idx_ref_cnt, ref_fb_ptr, free_fb);
    vp8_yv12_copy_frame(sd, &cm->yv12_fb[*ref_fb_ptr]);
  }

  return pbi->common.error.error_code;
}


static int get_free_fb(VP9_COMMON *cm) {
  int i;
  for (i = 0; i < NUM_YV12_BUFFERS; i++)
    if (cm->fb_idx_ref_cnt[i] == 0)
      break;

  assert(i < NUM_YV12_BUFFERS);
  cm->fb_idx_ref_cnt[i] = 1;
  return i;
}

static void ref_cnt_fb(int *buf, int *idx, int new_idx) {
  if (buf[*idx] > 0)
    buf[*idx]--;

  *idx = new_idx;

  buf[new_idx]++;
}

/* If any buffer copy / swapping is signalled it should be done here. */
static int swap_frame_buffers(VP9_COMMON *cm) {
  int err = 0;

  /* The alternate reference frame or golden frame can be updated
   *  using the new, last, or golden/alt ref frame.  If it
   *  is updated using the newly decoded frame it is a refresh.
   *  An update using the last or golden/alt ref frame is a copy.
   */
  if (cm->copy_buffer_to_arf) {
    int new_fb = 0;

    if (cm->copy_buffer_to_arf == 1)
      new_fb = cm->lst_fb_idx;
    else if (cm->copy_buffer_to_arf == 2)
      new_fb = cm->gld_fb_idx;
    else
      err = -1;

    ref_cnt_fb(cm->fb_idx_ref_cnt, &cm->alt_fb_idx, new_fb);
  }

  if (cm->copy_buffer_to_gf) {
    int new_fb = 0;

    if (cm->copy_buffer_to_gf == 1)
      new_fb = cm->lst_fb_idx;
    else if (cm->copy_buffer_to_gf == 2)
      new_fb = cm->alt_fb_idx;
    else
      err = -1;

    ref_cnt_fb(cm->fb_idx_ref_cnt, &cm->gld_fb_idx, new_fb);
  }

  if (cm->refresh_golden_frame)
    ref_cnt_fb(cm->fb_idx_ref_cnt, &cm->gld_fb_idx, cm->new_fb_idx);

  if (cm->refresh_alt_ref_frame)
    ref_cnt_fb(cm->fb_idx_ref_cnt, &cm->alt_fb_idx, cm->new_fb_idx);

  if (cm->refresh_last_frame) {
    ref_cnt_fb(cm->fb_idx_ref_cnt, &cm->lst_fb_idx, cm->new_fb_idx);

    cm->frame_to_show = &cm->yv12_fb[cm->lst_fb_idx];
  } else
    cm->frame_to_show = &cm->yv12_fb[cm->new_fb_idx];

  cm->fb_idx_ref_cnt[cm->new_fb_idx]--;

  return err;
}

int vp9_receive_compressed_data(VP9D_PTR ptr, unsigned long size,
                                const unsigned char **psource,
                                int64_t time_stamp) {
  VP9D_COMP *pbi = (VP9D_COMP *) ptr;
  VP9_COMMON *cm = &pbi->common;
  const unsigned char *source = *psource;
  int retcode = 0;

  /*if(pbi->ready_for_new_data == 0)
      return -1;*/

  if (ptr == 0) {
    return -1;
  }

  pbi->common.error.error_code = VPX_CODEC_OK;

  pbi->Source = source;
  pbi->source_sz = size;

  if (pbi->source_sz == 0) {
    /* This is used to signal that we are missing frames.
     * We do not know if the missing frame(s) was supposed to update
     * any of the reference buffers, but we act conservative and
     * mark only the last buffer as corrupted.
     */
    cm->yv12_fb[cm->lst_fb_idx].corrupted = 1;
  }

  cm->new_fb_idx = get_free_fb(cm);

  if (setjmp(pbi->common.error.jmp)) {
    pbi->common.error.setjmp = 0;

    /* We do not know if the missing frame(s) was supposed to update
     * any of the reference buffers, but we act conservative and
     * mark only the last buffer as corrupted.
     */
    cm->yv12_fb[cm->lst_fb_idx].corrupted = 1;

    if (cm->fb_idx_ref_cnt[cm->new_fb_idx] > 0)
      cm->fb_idx_ref_cnt[cm->new_fb_idx]--;
    return -1;
  }

  pbi->common.error.setjmp = 1;

  retcode = vp9_decode_frame(pbi, psource);

  if (retcode < 0) {
    pbi->common.error.error_code = VPX_CODEC_ERROR;
    pbi->common.error.setjmp = 0;
    if (cm->fb_idx_ref_cnt[cm->new_fb_idx] > 0)
      cm->fb_idx_ref_cnt[cm->new_fb_idx]--;
    return retcode;
  }

  {
    if (swap_frame_buffers(cm)) {
      pbi->common.error.error_code = VPX_CODEC_ERROR;
      pbi->common.error.setjmp = 0;
      return -1;
    }

#if WRITE_RECON_BUFFER == 2
    if (cm->show_frame)
      write_dx_frame_to_file(cm->frame_to_show,
                             cm->current_video_frame);
    else
      write_dx_frame_to_file(cm->frame_to_show,
                             cm->current_video_frame + 1000);
#endif

    if (cm->filter_level) {
      /* Apply the loop filter if appropriate. */
      vp9_loop_filter_frame(cm, &pbi->mb, cm->filter_level, 0);
    }
    vp8_yv12_extend_frame_borders(cm->frame_to_show);
  }

#if WRITE_RECON_BUFFER == 1
  if (cm->show_frame)
    recon_write_yuv_frame("recon.yuv", cm->frame_to_show);
#endif

  vp9_clear_system_state();

  if (cm->show_frame) {
    vpx_memcpy(cm->prev_mip, cm->mip,
               (cm->mb_cols + 1) * (cm->mb_rows + 1)* sizeof(MODE_INFO));
  } else {
    vpx_memset(cm->prev_mip, 0,
               (cm->mb_cols + 1) * (cm->mb_rows + 1)* sizeof(MODE_INFO));
  }

  /*vp9_print_modes_and_motion_vectors(cm->mi, cm->mb_rows,cm->mb_cols,
                                       cm->current_video_frame);*/

  if (cm->show_frame)
    cm->current_video_frame++;

  pbi->ready_for_new_data = 0;
  pbi->last_time_stamp = time_stamp;
  pbi->source_sz = 0;

  pbi->common.error.setjmp = 0;
  return retcode;
}

int vp9_get_raw_frame(VP9D_PTR ptr, YV12_BUFFER_CONFIG *sd,
                      int64_t *time_stamp, int64_t *time_end_stamp,
                      vp9_ppflags_t *flags) {
  int ret = -1;
  VP9D_COMP *pbi = (VP9D_COMP *) ptr;

  if (pbi->ready_for_new_data == 1)
    return ret;

  /* ie no raw frame to show!!! */
  if (pbi->common.show_frame == 0)
    return ret;

  pbi->ready_for_new_data = 1;
  *time_stamp = pbi->last_time_stamp;
  *time_end_stamp = 0;

  sd->clrtype = pbi->common.clr_type;
#if CONFIG_POSTPROC
  ret = vp9_post_proc_frame(&pbi->common, sd, flags);
#else

  if (pbi->common.frame_to_show) {
    *sd = *pbi->common.frame_to_show;
    sd->y_width = pbi->common.Width;
    sd->y_height = pbi->common.Height;
    sd->uv_height = pbi->common.Height / 2;
    ret = 0;
  } else {
    ret = -1;
  }

#endif /*!CONFIG_POSTPROC*/
  vp9_clear_system_state();
  return ret;
}