vp9/decoder/vp9_onyxd_if.c - platform/external/libvpx - Git at Google

 /*
  *  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 <assert.h>
 #include <limits.h>
 #include <stdio.h>

 #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_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"

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

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

   src = s->u_buffer;
   h = (_h + 1) >> 1;
   w = (w + 1) >> 1;

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

   src = s->v_buffer;
   h = (_h + 1) >> 1;

   do {
     fwrite(src, w, 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() {
   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 *const pbi = vpx_memalign(32, sizeof(VP9D_COMP));

   if (!pbi)
     return NULL;

   vp9_zero(*pbi);

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

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

   vp9_create_common(&pbi->common);

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

   // vp9_init_dequantizer() is first called here. Add check in
   // frame_init_dequantizer() to avoid unnecessary calling of
   // vp9_init_dequantizer() for every frame.
   vp9_init_dequantizer(&pbi->common);

   vp9_loop_filter_init(&pbi->common, &pbi->mb.lf);

   pbi->common.error.setjmp = 0;
   pbi->decoded_key_frame = 0;

   if (pbi->oxcf.max_threads > 1) {
     vp9_worker_init(&pbi->lf_worker);
     pbi->lf_worker.data1 = vpx_malloc(sizeof(LFWorkerData));
     pbi->lf_worker.hook = (VP9WorkerHook)vp9_loop_filter_worker;
     if (pbi->lf_worker.data1 == NULL || !vp9_worker_reset(&pbi->lf_worker)) {
       vp9_remove_decompressor(pbi);
       return NULL;
     }
   }

   return pbi;
 }

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

   if (!pbi)
     return;

   vp9_remove_common(&pbi->common);
   vp9_worker_end(&pbi->lf_worker);
   vpx_free(pbi->lf_worker.data1);
   vpx_free(pbi);
 }

 static int equal_dimensions(YV12_BUFFER_CONFIG *a, YV12_BUFFER_CONFIG *b) {
     return a->y_height == b->y_height && a->y_width == b->y_width &&
            a->uv_height == b->uv_height && a->uv_width == b->uv_width;
 }

 vpx_codec_err_t vp9_copy_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;

   /* TODO(jkoleszar): The decoder doesn't have any real knowledge of what the
    * encoder is using the frame buffers for. This is just a stub to keep the
    * vpxenc --test-decode functionality working, and will be replaced in a
    * later commit that adds VP9-specific controls for this functionality.
    */
   if (ref_frame_flag == VP9_LAST_FLAG) {
     ref_fb_idx = cm->ref_frame_map[0];
   } else {
     vpx_internal_error(&cm->error, VPX_CODEC_ERROR,
                        "Invalid reference frame");
     return cm->error.error_code;
   }

   if (!equal_dimensions(&cm->yv12_fb[ref_fb_idx], sd)) {
     vpx_internal_error(&cm->error, VPX_CODEC_ERROR,
                        "Incorrect buffer dimensions");
   } else {
     vp8_yv12_copy_frame(&cm->yv12_fb[ref_fb_idx], sd);
   }

   return cm->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;

   /* TODO(jkoleszar): The decoder doesn't have any real knowledge of what the
    * encoder is using the frame buffers for. This is just a stub to keep the
    * vpxenc --test-decode functionality working, and will be replaced in a
    * later commit that adds VP9-specific controls for this functionality.
    */
   if (ref_frame_flag == VP9_LAST_FLAG)
     ref_fb_ptr = &pbi->common.active_ref_idx[0];
   else if (ref_frame_flag == VP9_GOLD_FLAG)
     ref_fb_ptr = &pbi->common.active_ref_idx[1];
   else if (ref_frame_flag == VP9_ALT_FLAG)
     ref_fb_ptr = &pbi->common.active_ref_idx[2];
   else {
     vpx_internal_error(&pbi->common.error, VPX_CODEC_ERROR,
                        "Invalid reference frame");
     return pbi->common.error.error_code;
   }

   if (!equal_dimensions(&cm->yv12_fb[*ref_fb_ptr], sd)) {
     vpx_internal_error(&pbi->common.error, VPX_CODEC_ERROR,
                        "Incorrect buffer dimensions");
   } else {
     // Find an empty frame buffer.
     const int 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;
 }


 int vp9_get_reference_dec(VP9D_PTR ptr, int index, YV12_BUFFER_CONFIG **fb) {
   VP9D_COMP *pbi = (VP9D_COMP *) ptr;
   VP9_COMMON *cm = &pbi->common;

   if (index < 0 || index >= NUM_REF_FRAMES)
     return -1;

   *fb = &cm->yv12_fb[cm->ref_frame_map[index]];
   return 0;
 }

 /* If any buffer updating is signaled it should be done here. */
 static void swap_frame_buffers(VP9D_COMP *pbi) {
   int ref_index = 0, mask;
   VP9_COMMON *const cm = &pbi->common;

   for (mask = pbi->refresh_frame_flags; mask; mask >>= 1) {
     if (mask & 1)
       ref_cnt_fb(cm->fb_idx_ref_cnt, &cm->ref_frame_map[ref_index],
                  cm->new_fb_idx);
     ++ref_index;
   }

   cm->frame_to_show = &cm->yv12_fb[cm->new_fb_idx];
   cm->fb_idx_ref_cnt[cm->new_fb_idx]--;

   // Invalidate these references until the next frame starts.
   for (ref_index = 0; ref_index < 3; ref_index++)
     cm->active_ref_idx[ref_index] = INT_MAX;
 }

 int vp9_receive_compressed_data(VP9D_PTR ptr,
                                 uint64_t size, const uint8_t **psource,
                                 int64_t time_stamp) {
   VP9D_COMP *pbi = (VP9D_COMP *) ptr;
   VP9_COMMON *cm = &pbi->common;
   const uint8_t *source = *psource;
   int retcode = 0;

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

   if (ptr == 0)
     return -1;

   cm->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.
      *
      * TODO(jkoleszar): Error concealment is undefined and non-normative
      * at this point, but if it becomes so, [0] may not always be the correct
      * thing to do here.
      */
     if (cm->active_ref_idx[0] != INT_MAX)
       cm->yv12_fb[cm->active_ref_idx[0]].corrupted = 1;
   }

   cm->new_fb_idx = get_free_fb(cm);

   if (setjmp(cm->error.jmp)) {
     cm->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.
      *
      * TODO(jkoleszar): Error concealment is undefined and non-normative
      * at this point, but if it becomes so, [0] may not always be the correct
      * thing to do here.
      */
     if (cm->active_ref_idx[0] != INT_MAX)
       cm->yv12_fb[cm->active_ref_idx[0]].corrupted = 1;

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

     return -1;
   }

   cm->error.setjmp = 1;

   retcode = vp9_decode_frame(pbi, psource);

   if (retcode < 0) {
     cm->error.error_code = VPX_CODEC_ERROR;
     cm->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;
   }

   {
     swap_frame_buffers(pbi);

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

 #if WRITE_RECON_BUFFER == 2
     if (cm->show_frame)
       write_dx_frame_to_file(cm->frame_to_show,
                              cm->current_video_frame + 2000);
     else
       write_dx_frame_to_file(cm->frame_to_show,
                              cm->current_video_frame + 3000);
 #endif

     vp9_extend_frame_inner_borders(cm->frame_to_show,
                                    cm->subsampling_x,
                                    cm->subsampling_y);
   }

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

   vp9_clear_system_state();

   cm->last_show_frame = cm->show_frame;
   if (cm->show_frame) {
     // current mip will be the prev_mip for the next frame
     MODE_INFO *temp = cm->prev_mip;
     cm->prev_mip = cm->mip;
     cm->mip = temp;

     // update the upper left visible macroblock ptrs
     cm->mi = cm->mip + cm->mode_info_stride + 1;
     cm->prev_mi = cm->prev_mip + cm->mode_info_stride + 1;

     cm->current_video_frame++;
   }

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

   cm->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;

 #if CONFIG_POSTPROC
   ret = vp9_post_proc_frame(&pbi->common, &pbi->mb.lf, 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;
 }
	/*
	* 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 <assert.h>
	#include <limits.h>
	#include <stdio.h>

	#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_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"

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

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

	src = s->u_buffer;
	h = (_h + 1) >> 1;
	w = (w + 1) >> 1;

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

	src = s->v_buffer;
	h = (_h + 1) >> 1;

	do {
	fwrite(src, w, 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() {
	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 *const pbi = vpx_memalign(32, sizeof(VP9D_COMP));

	if (!pbi)
	return NULL;

	vp9_zero(*pbi);

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

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

	vp9_create_common(&pbi->common);

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

	// vp9_init_dequantizer() is first called here. Add check in
	// frame_init_dequantizer() to avoid unnecessary calling of
	// vp9_init_dequantizer() for every frame.
	vp9_init_dequantizer(&pbi->common);

	vp9_loop_filter_init(&pbi->common, &pbi->mb.lf);

	pbi->common.error.setjmp = 0;
	pbi->decoded_key_frame = 0;

	if (pbi->oxcf.max_threads > 1) {
	vp9_worker_init(&pbi->lf_worker);
	pbi->lf_worker.data1 = vpx_malloc(sizeof(LFWorkerData));
	pbi->lf_worker.hook = (VP9WorkerHook)vp9_loop_filter_worker;
	if (pbi->lf_worker.data1 == NULL \|\| !vp9_worker_reset(&pbi->lf_worker)) {
	vp9_remove_decompressor(pbi);
	return NULL;
	}
	}

	return pbi;
	}

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

	if (!pbi)
	return;

	vp9_remove_common(&pbi->common);
	vp9_worker_end(&pbi->lf_worker);
	vpx_free(pbi->lf_worker.data1);
	vpx_free(pbi);
	}

	static int equal_dimensions(YV12_BUFFER_CONFIG a, YV12_BUFFER_CONFIG b) {
	return a->y_height == b->y_height && a->y_width == b->y_width &&
	a->uv_height == b->uv_height && a->uv_width == b->uv_width;
	}

	vpx_codec_err_t vp9_copy_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;

	/* TODO(jkoleszar): The decoder doesn't have any real knowledge of what the
	* encoder is using the frame buffers for. This is just a stub to keep the
	* vpxenc --test-decode functionality working, and will be replaced in a
	* later commit that adds VP9-specific controls for this functionality.
	*/
	if (ref_frame_flag == VP9_LAST_FLAG) {
	ref_fb_idx = cm->ref_frame_map[0];
	} else {
	vpx_internal_error(&cm->error, VPX_CODEC_ERROR,
	"Invalid reference frame");
	return cm->error.error_code;
	}

	if (!equal_dimensions(&cm->yv12_fb[ref_fb_idx], sd)) {
	vpx_internal_error(&cm->error, VPX_CODEC_ERROR,
	"Incorrect buffer dimensions");
	} else {
	vp8_yv12_copy_frame(&cm->yv12_fb[ref_fb_idx], sd);
	}

	return cm->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;

	/* TODO(jkoleszar): The decoder doesn't have any real knowledge of what the
	* encoder is using the frame buffers for. This is just a stub to keep the
	* vpxenc --test-decode functionality working, and will be replaced in a
	* later commit that adds VP9-specific controls for this functionality.
	*/
	if (ref_frame_flag == VP9_LAST_FLAG)
	ref_fb_ptr = &pbi->common.active_ref_idx[0];
	else if (ref_frame_flag == VP9_GOLD_FLAG)
	ref_fb_ptr = &pbi->common.active_ref_idx[1];
	else if (ref_frame_flag == VP9_ALT_FLAG)
	ref_fb_ptr = &pbi->common.active_ref_idx[2];
	else {
	vpx_internal_error(&pbi->common.error, VPX_CODEC_ERROR,
	"Invalid reference frame");
	return pbi->common.error.error_code;
	}

	if (!equal_dimensions(&cm->yv12_fb[*ref_fb_ptr], sd)) {
	vpx_internal_error(&pbi->common.error, VPX_CODEC_ERROR,
	"Incorrect buffer dimensions");
	} else {
	// Find an empty frame buffer.
	const int 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;
	}


	int vp9_get_reference_dec(VP9D_PTR ptr, int index, YV12_BUFFER_CONFIG **fb) {
	VP9D_COMP pbi = (VP9D_COMP ) ptr;
	VP9_COMMON *cm = &pbi->common;

	if (index < 0 \|\| index >= NUM_REF_FRAMES)
	return -1;

	*fb = &cm->yv12_fb[cm->ref_frame_map[index]];
	return 0;
	}

	/* If any buffer updating is signaled it should be done here. */
	static void swap_frame_buffers(VP9D_COMP *pbi) {
	int ref_index = 0, mask;
	VP9_COMMON *const cm = &pbi->common;

	for (mask = pbi->refresh_frame_flags; mask; mask >>= 1) {
	if (mask & 1)
	ref_cnt_fb(cm->fb_idx_ref_cnt, &cm->ref_frame_map[ref_index],
	cm->new_fb_idx);
	++ref_index;
	}

	cm->frame_to_show = &cm->yv12_fb[cm->new_fb_idx];
	cm->fb_idx_ref_cnt[cm->new_fb_idx]--;

	// Invalidate these references until the next frame starts.
	for (ref_index = 0; ref_index < 3; ref_index++)
	cm->active_ref_idx[ref_index] = INT_MAX;
	}

	int vp9_receive_compressed_data(VP9D_PTR ptr,
	uint64_t size, const uint8_t **psource,
	int64_t time_stamp) {
	VP9D_COMP pbi = (VP9D_COMP ) ptr;
	VP9_COMMON *cm = &pbi->common;
	const uint8_t source = psource;
	int retcode = 0;

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

	if (ptr == 0)
	return -1;

	cm->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.
	*
	* TODO(jkoleszar): Error concealment is undefined and non-normative
	* at this point, but if it becomes so, [0] may not always be the correct
	* thing to do here.
	*/
	if (cm->active_ref_idx[0] != INT_MAX)
	cm->yv12_fb[cm->active_ref_idx[0]].corrupted = 1;
	}

	cm->new_fb_idx = get_free_fb(cm);

	if (setjmp(cm->error.jmp)) {
	cm->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.
	*
	* TODO(jkoleszar): Error concealment is undefined and non-normative
	* at this point, but if it becomes so, [0] may not always be the correct
	* thing to do here.
	*/
	if (cm->active_ref_idx[0] != INT_MAX)
	cm->yv12_fb[cm->active_ref_idx[0]].corrupted = 1;

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

	return -1;
	}

	cm->error.setjmp = 1;

	retcode = vp9_decode_frame(pbi, psource);

	if (retcode < 0) {
	cm->error.error_code = VPX_CODEC_ERROR;
	cm->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;
	}

	{
	swap_frame_buffers(pbi);

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

	#if WRITE_RECON_BUFFER == 2
	if (cm->show_frame)
	write_dx_frame_to_file(cm->frame_to_show,
	cm->current_video_frame + 2000);
	else
	write_dx_frame_to_file(cm->frame_to_show,
	cm->current_video_frame + 3000);
	#endif

	vp9_extend_frame_inner_borders(cm->frame_to_show,
	cm->subsampling_x,
	cm->subsampling_y);
	}

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

	vp9_clear_system_state();

	cm->last_show_frame = cm->show_frame;
	if (cm->show_frame) {
	// current mip will be the prev_mip for the next frame
	MODE_INFO *temp = cm->prev_mip;
	cm->prev_mip = cm->mip;
	cm->mip = temp;

	// update the upper left visible macroblock ptrs
	cm->mi = cm->mip + cm->mode_info_stride + 1;
	cm->prev_mi = cm->prev_mip + cm->mode_info_stride + 1;

	cm->current_video_frame++;
	}

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

	cm->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;

	#if CONFIG_POSTPROC
	ret = vp9_post_proc_frame(&pbi->common, &pbi->mb.lf, 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;
	}