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vpx/vp8/vp8_cx_iface.c
John Koleszar 87e570e6be Merge remote branch 'origin/master' into experimental 
Change-Id: I473166452c0ed5a4219b5e7d96a91a6641b11b9d
2011-07-30 00:05:09 -04:00

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/*
* 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 "vpx/vpx_codec.h"
#include "vpx/internal/vpx_codec_internal.h"
#include "vpx_version.h"
#include "vp8/encoder/onyx_int.h"
#include "vpx/vp8e.h"
#include "vp8/encoder/firstpass.h"
#include "vp8/common/onyx.h"
#include <stdlib.h>
#include <string.h>
/* This value is a sentinel for determining whether the user has set a mode
* directly through the deprecated VP8E_SET_ENCODING_MODE control.
*/
#define NO_MODE_SET 255
struct vp8_extracfg
{
struct vpx_codec_pkt_list *pkt_list;
vp8e_encoding_mode encoding_mode; /** best, good, realtime */
int cpu_used; /** available cpu percentage in 1/16*/
unsigned int enable_auto_alt_ref; /** if encoder decides to uses alternate reference frame */
unsigned int noise_sensitivity;
unsigned int Sharpness;
unsigned int static_thresh;
unsigned int token_partitions;
unsigned int arnr_max_frames; /* alt_ref Noise Reduction Max Frame Count */
unsigned int arnr_strength; /* alt_ref Noise Reduction Strength */
unsigned int arnr_type; /* alt_ref filter type */
unsigned int experimental;
vp8e_tuning tuning;
unsigned int cq_level; /* constrained quality level */
unsigned int rc_max_intra_bitrate_pct;
};
struct extraconfig_map
{
int usage;
struct vp8_extracfg cfg;
};
static const struct extraconfig_map extracfg_map[] =
{
{
0,
{
NULL,
#if !(CONFIG_REALTIME_ONLY)
VP8_BEST_QUALITY_ENCODING, /* Encoding Mode */
0, /* cpu_used */
#else
VP8_REAL_TIME_ENCODING, /* Encoding Mode */
4, /* cpu_used */
#endif
0, /* enable_auto_alt_ref */
0, /* noise_sensitivity */
0, /* Sharpness */
0, /* static_thresh */
VP8_ONE_TOKENPARTITION, /* token_partitions */
0, /* arnr_max_frames */
3, /* arnr_strength */
3, /* arnr_type*/
0, /* experimental mode */
0, /* tuning*/
10, /* cq_level */
0, /* rc_max_intra_bitrate_pct */
}
}
};
struct vpx_codec_alg_priv
{
vpx_codec_priv_t base;
vpx_codec_enc_cfg_t cfg;
struct vp8_extracfg vp8_cfg;
VP8_CONFIG oxcf;
VP8_PTR cpi;
unsigned char *cx_data;
unsigned int cx_data_sz;
vpx_image_t preview_img;
unsigned int next_frame_flag;
vp8_postproc_cfg_t preview_ppcfg;
vpx_codec_pkt_list_decl(64) pkt_list; // changed to accomendate the maximum number of lagged frames allowed
int deprecated_mode;
unsigned int fixed_kf_cntr;
};
static vpx_codec_err_t
update_error_state(vpx_codec_alg_priv_t *ctx,
const struct vpx_internal_error_info *error)
{
vpx_codec_err_t res;
if ((res = error->error_code))
ctx->base.err_detail = error->has_detail
? error->detail
: NULL;
return res;
}
#undef ERROR
#define ERROR(str) do {\
ctx->base.err_detail = str;\
return VPX_CODEC_INVALID_PARAM;\
} while(0)
#define RANGE_CHECK(p,memb,lo,hi) do {\
if(!(((p)->memb == lo || (p)->memb > (lo)) && (p)->memb <= hi)) \
ERROR(#memb " out of range ["#lo".."#hi"]");\
} while(0)
#define RANGE_CHECK_HI(p,memb,hi) do {\
if(!((p)->memb <= (hi))) \
ERROR(#memb " out of range [.."#hi"]");\
} while(0)
#define RANGE_CHECK_LO(p,memb,lo) do {\
if(!((p)->memb >= (lo))) \
ERROR(#memb " out of range ["#lo"..]");\
} while(0)
#define RANGE_CHECK_BOOL(p,memb) do {\
if(!!((p)->memb) != (p)->memb) ERROR(#memb " expected boolean");\
} while(0)
static vpx_codec_err_t validate_config(vpx_codec_alg_priv_t *ctx,
const vpx_codec_enc_cfg_t *cfg,
const struct vp8_extracfg *vp8_cfg)
{
RANGE_CHECK(cfg, g_w, 1, 16383); /* 14 bits available */
RANGE_CHECK(cfg, g_h, 1, 16383); /* 14 bits available */
RANGE_CHECK(cfg, g_timebase.den, 1, 1000000000);
RANGE_CHECK(cfg, g_timebase.num, 1, cfg->g_timebase.den);
RANGE_CHECK_HI(cfg, g_profile, 3);
RANGE_CHECK_HI(cfg, rc_max_quantizer, 63);
RANGE_CHECK_HI(cfg, rc_min_quantizer, cfg->rc_max_quantizer);
RANGE_CHECK_HI(cfg, g_threads, 64);
#if !(CONFIG_REALTIME_ONLY)
RANGE_CHECK_HI(cfg, g_lag_in_frames, 25);
#else
RANGE_CHECK_HI(cfg, g_lag_in_frames, 0);
#endif
RANGE_CHECK(cfg, rc_end_usage, VPX_VBR, VPX_CQ);
RANGE_CHECK_HI(cfg, rc_undershoot_pct, 1000);
RANGE_CHECK_HI(cfg, rc_overshoot_pct, 1000);
RANGE_CHECK_HI(cfg, rc_2pass_vbr_bias_pct, 100);
RANGE_CHECK(cfg, kf_mode, VPX_KF_DISABLED, VPX_KF_AUTO);
//RANGE_CHECK_BOOL(cfg, g_delete_firstpassfile);
RANGE_CHECK_BOOL(cfg, rc_resize_allowed);
RANGE_CHECK_HI(cfg, rc_dropframe_thresh, 100);
RANGE_CHECK_HI(cfg, rc_resize_up_thresh, 100);
RANGE_CHECK_HI(cfg, rc_resize_down_thresh, 100);
#if !(CONFIG_REALTIME_ONLY)
RANGE_CHECK(cfg, g_pass, VPX_RC_ONE_PASS, VPX_RC_LAST_PASS);
#else
RANGE_CHECK(cfg, g_pass, VPX_RC_ONE_PASS, VPX_RC_ONE_PASS);
#endif
/* VP8 does not support a lower bound on the keyframe interval in
* automatic keyframe placement mode.
*/
if (cfg->kf_mode != VPX_KF_DISABLED && cfg->kf_min_dist != cfg->kf_max_dist
&& cfg->kf_min_dist > 0)
ERROR("kf_min_dist not supported in auto mode, use 0 "
"or kf_max_dist instead.");
RANGE_CHECK_BOOL(vp8_cfg, enable_auto_alt_ref);
RANGE_CHECK(vp8_cfg, cpu_used, -16, 16);
#if !(CONFIG_REALTIME_ONLY)
RANGE_CHECK(vp8_cfg, encoding_mode, VP8_BEST_QUALITY_ENCODING, VP8_REAL_TIME_ENCODING);
RANGE_CHECK_HI(vp8_cfg, noise_sensitivity, 6);
#else
RANGE_CHECK(vp8_cfg, encoding_mode, VP8_REAL_TIME_ENCODING, VP8_REAL_TIME_ENCODING);
RANGE_CHECK(vp8_cfg, noise_sensitivity, 0, 0);
#endif
RANGE_CHECK(vp8_cfg, token_partitions, VP8_ONE_TOKENPARTITION, VP8_EIGHT_TOKENPARTITION);
RANGE_CHECK_HI(vp8_cfg, Sharpness, 7);
RANGE_CHECK(vp8_cfg, arnr_max_frames, 0, 15);
RANGE_CHECK_HI(vp8_cfg, arnr_strength, 6);
RANGE_CHECK(vp8_cfg, arnr_type, 1, 3);
RANGE_CHECK(vp8_cfg, cq_level, 0, 63);
#if !(CONFIG_REALTIME_ONLY)
if (cfg->g_pass == VPX_RC_LAST_PASS)
{
size_t packet_sz = sizeof(FIRSTPASS_STATS);
int n_packets = cfg->rc_twopass_stats_in.sz / packet_sz;
FIRSTPASS_STATS *stats;
if (!cfg->rc_twopass_stats_in.buf)
ERROR("rc_twopass_stats_in.buf not set.");
if (cfg->rc_twopass_stats_in.sz % packet_sz)
ERROR("rc_twopass_stats_in.sz indicates truncated packet.");
if (cfg->rc_twopass_stats_in.sz < 2 * packet_sz)
ERROR("rc_twopass_stats_in requires at least two packets.");
stats = (void*)((char *)cfg->rc_twopass_stats_in.buf
+ (n_packets - 1) * packet_sz);
if ((int)(stats->count + 0.5) != n_packets - 1)
ERROR("rc_twopass_stats_in missing EOS stats packet");
}
#endif
return VPX_CODEC_OK;
}
static vpx_codec_err_t validate_img(vpx_codec_alg_priv_t *ctx,
const vpx_image_t *img)
{
switch (img->fmt)
{
case VPX_IMG_FMT_YV12:
case VPX_IMG_FMT_I420:
case VPX_IMG_FMT_VPXI420:
case VPX_IMG_FMT_VPXYV12:
break;
default:
ERROR("Invalid image format. Only YV12 and I420 images are supported");
}
if ((img->d_w != ctx->cfg.g_w) || (img->d_h != ctx->cfg.g_h))
ERROR("Image size must match encoder init configuration size");
return VPX_CODEC_OK;
}
static vpx_codec_err_t set_vp8e_config(VP8_CONFIG *oxcf,
vpx_codec_enc_cfg_t cfg,
struct vp8_extracfg vp8_cfg)
{
oxcf->multi_threaded = cfg.g_threads;
oxcf->Version = cfg.g_profile;
oxcf->Version |= vp8_cfg.experimental? 0x4 : 0;
oxcf->Width = cfg.g_w;
oxcf->Height = cfg.g_h;
/* guess a frame rate if out of whack, use 30 */
oxcf->frame_rate = (double)(cfg.g_timebase.den) / (double)(cfg.g_timebase.num);
if (oxcf->frame_rate > 180)
{
oxcf->frame_rate = 30;
}
oxcf->error_resilient_mode = cfg.g_error_resilient;
switch (cfg.g_pass)
{
case VPX_RC_ONE_PASS:
oxcf->Mode = MODE_BESTQUALITY;
break;
case VPX_RC_FIRST_PASS:
oxcf->Mode = MODE_FIRSTPASS;
break;
case VPX_RC_LAST_PASS:
oxcf->Mode = MODE_SECONDPASS_BEST;
break;
}
if (cfg.g_pass == VPX_RC_FIRST_PASS)
{
oxcf->allow_lag = 0;
oxcf->lag_in_frames = 0;
}
else
{
oxcf->allow_lag = (cfg.g_lag_in_frames) > 0;
oxcf->lag_in_frames = cfg.g_lag_in_frames;
}
oxcf->allow_df = (cfg.rc_dropframe_thresh > 0);
oxcf->drop_frames_water_mark = cfg.rc_dropframe_thresh;
oxcf->allow_spatial_resampling = cfg.rc_resize_allowed;
oxcf->resample_up_water_mark = cfg.rc_resize_up_thresh;
oxcf->resample_down_water_mark = cfg.rc_resize_down_thresh;
if (cfg.rc_end_usage == VPX_VBR)
{
oxcf->end_usage = USAGE_LOCAL_FILE_PLAYBACK;
}
else if (cfg.rc_end_usage == VPX_CBR)
{
oxcf->end_usage = USAGE_STREAM_FROM_SERVER;
}
else if (cfg.rc_end_usage == VPX_CQ)
{
oxcf->end_usage = USAGE_CONSTRAINED_QUALITY;
}
oxcf->target_bandwidth = cfg.rc_target_bitrate;
oxcf->rc_max_intra_bitrate_pct = vp8_cfg.rc_max_intra_bitrate_pct;
oxcf->best_allowed_q = cfg.rc_min_quantizer;
oxcf->worst_allowed_q = cfg.rc_max_quantizer;
oxcf->cq_level = vp8_cfg.cq_level;
oxcf->fixed_q = -1;
oxcf->under_shoot_pct = cfg.rc_undershoot_pct;
oxcf->over_shoot_pct = cfg.rc_overshoot_pct;
oxcf->maximum_buffer_size = cfg.rc_buf_sz;
oxcf->starting_buffer_level = cfg.rc_buf_initial_sz;
oxcf->optimal_buffer_level = cfg.rc_buf_optimal_sz;
oxcf->two_pass_vbrbias = cfg.rc_2pass_vbr_bias_pct;
oxcf->two_pass_vbrmin_section = cfg.rc_2pass_vbr_minsection_pct;
oxcf->two_pass_vbrmax_section = cfg.rc_2pass_vbr_maxsection_pct;
oxcf->auto_key = cfg.kf_mode == VPX_KF_AUTO
&& cfg.kf_min_dist != cfg.kf_max_dist;
//oxcf->kf_min_dist = cfg.kf_min_dis;
oxcf->key_freq = cfg.kf_max_dist;
//oxcf->delete_first_pass_file = cfg.g_delete_firstpassfile;
//strcpy(oxcf->first_pass_file, cfg.g_firstpass_file);
oxcf->cpu_used = vp8_cfg.cpu_used;
oxcf->encode_breakout = vp8_cfg.static_thresh;
oxcf->play_alternate = vp8_cfg.enable_auto_alt_ref;
oxcf->noise_sensitivity = vp8_cfg.noise_sensitivity;
oxcf->Sharpness = vp8_cfg.Sharpness;
oxcf->token_partitions = vp8_cfg.token_partitions;
oxcf->two_pass_stats_in = cfg.rc_twopass_stats_in;
oxcf->output_pkt_list = vp8_cfg.pkt_list;
oxcf->arnr_max_frames = vp8_cfg.arnr_max_frames;
oxcf->arnr_strength = vp8_cfg.arnr_strength;
oxcf->arnr_type = vp8_cfg.arnr_type;
oxcf->tuning = vp8_cfg.tuning;
/*
printf("Current VP8 Settings: \n");
printf("target_bandwidth: %d\n", oxcf->target_bandwidth);
printf("noise_sensitivity: %d\n", oxcf->noise_sensitivity);
printf("Sharpness: %d\n", oxcf->Sharpness);
printf("cpu_used: %d\n", oxcf->cpu_used);
printf("Mode: %d\n", oxcf->Mode);
printf("delete_first_pass_file: %d\n", oxcf->delete_first_pass_file);
printf("auto_key: %d\n", oxcf->auto_key);
printf("key_freq: %d\n", oxcf->key_freq);
printf("end_usage: %d\n", oxcf->end_usage);
printf("under_shoot_pct: %d\n", oxcf->under_shoot_pct);
printf("over_shoot_pct: %d\n", oxcf->over_shoot_pct);
printf("starting_buffer_level: %d\n", oxcf->starting_buffer_level);
printf("optimal_buffer_level: %d\n", oxcf->optimal_buffer_level);
printf("maximum_buffer_size: %d\n", oxcf->maximum_buffer_size);
printf("fixed_q: %d\n", oxcf->fixed_q);
printf("worst_allowed_q: %d\n", oxcf->worst_allowed_q);
printf("best_allowed_q: %d\n", oxcf->best_allowed_q);
printf("allow_spatial_resampling: %d\n", oxcf->allow_spatial_resampling);
printf("resample_down_water_mark: %d\n", oxcf->resample_down_water_mark);
printf("resample_up_water_mark: %d\n", oxcf->resample_up_water_mark);
printf("allow_df: %d\n", oxcf->allow_df);
printf("drop_frames_water_mark: %d\n", oxcf->drop_frames_water_mark);
printf("two_pass_vbrbias: %d\n", oxcf->two_pass_vbrbias);
printf("two_pass_vbrmin_section: %d\n", oxcf->two_pass_vbrmin_section);
printf("two_pass_vbrmax_section: %d\n", oxcf->two_pass_vbrmax_section);
printf("allow_lag: %d\n", oxcf->allow_lag);
printf("lag_in_frames: %d\n", oxcf->lag_in_frames);
printf("play_alternate: %d\n", oxcf->play_alternate);
printf("Version: %d\n", oxcf->Version);
printf("multi_threaded: %d\n", oxcf->multi_threaded);
printf("encode_breakout: %d\n", oxcf->encode_breakout);
*/
return VPX_CODEC_OK;
}
static vpx_codec_err_t vp8e_set_config(vpx_codec_alg_priv_t *ctx,
const vpx_codec_enc_cfg_t *cfg)
{
vpx_codec_err_t res;
if ((cfg->g_w != ctx->cfg.g_w) || (cfg->g_h != ctx->cfg.g_h))
ERROR("Cannot change width or height after initialization");
/* Prevent increasing lag_in_frames. This check is stricter than it needs
* to be -- the limit is not increasing past the first lag_in_frames
* value, but we don't track the initial config, only the last successful
* config.
*/
if ((cfg->g_lag_in_frames > ctx->cfg.g_lag_in_frames))
ERROR("Cannot increase lag_in_frames");
res = validate_config(ctx, cfg, &ctx->vp8_cfg);
if (!res)
{
ctx->cfg = *cfg;
set_vp8e_config(&ctx->oxcf, ctx->cfg, ctx->vp8_cfg);
vp8_change_config(ctx->cpi, &ctx->oxcf);
}
return res;
}
int vp8_reverse_trans(int);
static vpx_codec_err_t get_param(vpx_codec_alg_priv_t *ctx,
int ctrl_id,
va_list args)
{
void *arg = va_arg(args, void *);
#define MAP(id, var) case id: *(RECAST(id, arg)) = var; break
if (!arg)
return VPX_CODEC_INVALID_PARAM;
switch (ctrl_id)
{
MAP(VP8E_GET_LAST_QUANTIZER, vp8_get_quantizer(ctx->cpi));
MAP(VP8E_GET_LAST_QUANTIZER_64, vp8_reverse_trans(vp8_get_quantizer(ctx->cpi)));
}
return VPX_CODEC_OK;
#undef MAP
}
static vpx_codec_err_t set_param(vpx_codec_alg_priv_t *ctx,
int ctrl_id,
va_list args)
{
vpx_codec_err_t res = VPX_CODEC_OK;
struct vp8_extracfg xcfg = ctx->vp8_cfg;
#define MAP(id, var) case id: var = CAST(id, args); break;
switch (ctrl_id)
{
MAP(VP8E_SET_ENCODING_MODE, ctx->deprecated_mode);
MAP(VP8E_SET_CPUUSED, xcfg.cpu_used);
MAP(VP8E_SET_ENABLEAUTOALTREF, xcfg.enable_auto_alt_ref);
MAP(VP8E_SET_NOISE_SENSITIVITY, xcfg.noise_sensitivity);
MAP(VP8E_SET_SHARPNESS, xcfg.Sharpness);
MAP(VP8E_SET_STATIC_THRESHOLD, xcfg.static_thresh);
MAP(VP8E_SET_TOKEN_PARTITIONS, xcfg.token_partitions);
MAP(VP8E_SET_ARNR_MAXFRAMES, xcfg.arnr_max_frames);
MAP(VP8E_SET_ARNR_STRENGTH , xcfg.arnr_strength);
MAP(VP8E_SET_ARNR_TYPE , xcfg.arnr_type);
MAP(VP8E_SET_TUNING, xcfg.tuning);
MAP(VP8E_SET_CQ_LEVEL, xcfg.cq_level);
MAP(VP8E_SET_MAX_INTRA_BITRATE_PCT, xcfg.rc_max_intra_bitrate_pct);
}
res = validate_config(ctx, &ctx->cfg, &xcfg);
if (!res)
{
ctx->vp8_cfg = xcfg;
set_vp8e_config(&ctx->oxcf, ctx->cfg, ctx->vp8_cfg);
vp8_change_config(ctx->cpi, &ctx->oxcf);
}
return res;
#undef MAP
}
static vpx_codec_err_t vp8e_common_init(vpx_codec_ctx_t *ctx,
int experimental)
{
vpx_codec_err_t res = VPX_DEC_OK;
struct vpx_codec_alg_priv *priv;
vpx_codec_enc_cfg_t *cfg;
unsigned int i;
VP8_PTR optr;
if (!ctx->priv)
{
priv = calloc(1, sizeof(struct vpx_codec_alg_priv));
if (!priv)
{
return VPX_CODEC_MEM_ERROR;
}
ctx->priv = &priv->base;
ctx->priv->sz = sizeof(*ctx->priv);
ctx->priv->iface = ctx->iface;
ctx->priv->alg_priv = priv;
ctx->priv->init_flags = ctx->init_flags;
if (ctx->config.enc)
{
/* Update the reference to the config structure to an
* internal copy.
*/
ctx->priv->alg_priv->cfg = *ctx->config.enc;
ctx->config.enc = &ctx->priv->alg_priv->cfg;
}
cfg = &ctx->priv->alg_priv->cfg;
/* Select the extra vp6 configuration table based on the current
* usage value. If the current usage value isn't found, use the
* values for usage case 0.
*/
for (i = 0;
extracfg_map[i].usage && extracfg_map[i].usage != cfg->g_usage;
i++);
priv->vp8_cfg = extracfg_map[i].cfg;
priv->vp8_cfg.pkt_list = &priv->pkt_list.head;
priv->vp8_cfg.experimental = experimental;
priv->cx_data_sz = priv->cfg.g_w * priv->cfg.g_h * 3 / 2 * 2;
if (priv->cx_data_sz < 4096) priv->cx_data_sz = 4096;
priv->cx_data = malloc(priv->cx_data_sz);
if (!priv->cx_data)
{
return VPX_CODEC_MEM_ERROR;
}
priv->deprecated_mode = NO_MODE_SET;
vp8_initialize();
res = validate_config(priv, &priv->cfg, &priv->vp8_cfg);
if (!res)
{
set_vp8e_config(&ctx->priv->alg_priv->oxcf,
ctx->priv->alg_priv->cfg,
ctx->priv->alg_priv->vp8_cfg);
optr = vp8_create_compressor(&ctx->priv->alg_priv->oxcf);
if (!optr)
res = VPX_CODEC_MEM_ERROR;
else
ctx->priv->alg_priv->cpi = optr;
}
}
return res;
}
static vpx_codec_err_t vp8e_init(vpx_codec_ctx_t *ctx)
{
return vp8e_common_init(ctx, 0);
}
#if CONFIG_EXPERIMENTAL
static vpx_codec_err_t vp8e_exp_init(vpx_codec_ctx_t *ctx)
{
return vp8e_common_init(ctx, 1);
}
#endif
static vpx_codec_err_t vp8e_destroy(vpx_codec_alg_priv_t *ctx)
{
free(ctx->cx_data);
vp8_remove_compressor(&ctx->cpi);
free(ctx);
return VPX_CODEC_OK;
}
static vpx_codec_err_t image2yuvconfig(const vpx_image_t *img,
YV12_BUFFER_CONFIG *yv12)
{
vpx_codec_err_t res = VPX_CODEC_OK;
yv12->y_buffer = img->planes[VPX_PLANE_Y];
yv12->u_buffer = img->planes[VPX_PLANE_U];
yv12->v_buffer = img->planes[VPX_PLANE_V];
yv12->y_width = img->d_w;
yv12->y_height = img->d_h;
yv12->uv_width = (1 + yv12->y_width) / 2;
yv12->uv_height = (1 + yv12->y_height) / 2;
yv12->y_stride = img->stride[VPX_PLANE_Y];
yv12->uv_stride = img->stride[VPX_PLANE_U];
yv12->border = (img->stride[VPX_PLANE_Y] - img->w) / 2;
yv12->clrtype = (img->fmt == VPX_IMG_FMT_VPXI420 || img->fmt == VPX_IMG_FMT_VPXYV12); //REG_YUV = 0
return res;
}
static void pick_quickcompress_mode(vpx_codec_alg_priv_t *ctx,
unsigned long duration,
unsigned long deadline)
{
unsigned int new_qc;
#if !(CONFIG_REALTIME_ONLY)
/* Use best quality mode if no deadline is given. */
new_qc = MODE_BESTQUALITY;
if (deadline)
{
uint64_t duration_us;
/* Convert duration parameter from stream timebase to microseconds */
duration_us = (uint64_t)duration * 1000000
* (uint64_t)ctx->cfg.g_timebase.num
/ (uint64_t)ctx->cfg.g_timebase.den;
/* If the deadline is more that the duration this frame is to be shown,
* use good quality mode. Otherwise use realtime mode.
*/
new_qc = (deadline > duration_us) ? MODE_GOODQUALITY : MODE_REALTIME;
}
#else
new_qc = MODE_REALTIME;
#endif
switch (ctx->deprecated_mode)
{
case VP8_BEST_QUALITY_ENCODING:
new_qc = MODE_BESTQUALITY;
break;
case VP8_GOOD_QUALITY_ENCODING:
new_qc = MODE_GOODQUALITY;
break;
case VP8_REAL_TIME_ENCODING:
new_qc = MODE_REALTIME;
break;
}
if (ctx->cfg.g_pass == VPX_RC_FIRST_PASS)
new_qc = MODE_FIRSTPASS;
else if (ctx->cfg.g_pass == VPX_RC_LAST_PASS)
new_qc = (new_qc == MODE_BESTQUALITY)
? MODE_SECONDPASS_BEST
: MODE_SECONDPASS;
if (ctx->oxcf.Mode != new_qc)
{
ctx->oxcf.Mode = new_qc;
vp8_change_config(ctx->cpi, &ctx->oxcf);
}
}
static vpx_codec_err_t vp8e_encode(vpx_codec_alg_priv_t *ctx,
const vpx_image_t *img,
vpx_codec_pts_t pts,
unsigned long duration,
vpx_enc_frame_flags_t flags,
unsigned long deadline)
{
vpx_codec_err_t res = VPX_CODEC_OK;
if (img)
res = validate_img(ctx, img);
pick_quickcompress_mode(ctx, duration, deadline);
vpx_codec_pkt_list_init(&ctx->pkt_list);
/* Handle Flags */
if (((flags & VP8_EFLAG_NO_UPD_GF) && (flags & VP8_EFLAG_FORCE_GF))
|| ((flags & VP8_EFLAG_NO_UPD_ARF) && (flags & VP8_EFLAG_FORCE_ARF)))
{
ctx->base.err_detail = "Conflicting flags.";
return VPX_CODEC_INVALID_PARAM;
}
if (flags & (VP8_EFLAG_NO_REF_LAST | VP8_EFLAG_NO_REF_GF
| VP8_EFLAG_NO_REF_ARF))
{
int ref = 7;
if (flags & VP8_EFLAG_NO_REF_LAST)
ref ^= VP8_LAST_FLAG;
if (flags & VP8_EFLAG_NO_REF_GF)
ref ^= VP8_GOLD_FLAG;
if (flags & VP8_EFLAG_NO_REF_ARF)
ref ^= VP8_ALT_FLAG;
vp8_use_as_reference(ctx->cpi, ref);
}
if (flags & (VP8_EFLAG_NO_UPD_LAST | VP8_EFLAG_NO_UPD_GF
| VP8_EFLAG_NO_UPD_ARF | VP8_EFLAG_FORCE_GF
| VP8_EFLAG_FORCE_ARF))
{
int upd = 7;
if (flags & VP8_EFLAG_NO_UPD_LAST)
upd ^= VP8_LAST_FLAG;
if (flags & VP8_EFLAG_NO_UPD_GF)
upd ^= VP8_GOLD_FLAG;
if (flags & VP8_EFLAG_NO_UPD_ARF)
upd ^= VP8_ALT_FLAG;
vp8_update_reference(ctx->cpi, upd);
}
if (flags & VP8_EFLAG_NO_UPD_ENTROPY)
{
vp8_update_entropy(ctx->cpi, 0);
}
/* Handle fixed keyframe intervals */
if (ctx->cfg.kf_mode == VPX_KF_AUTO
&& ctx->cfg.kf_min_dist == ctx->cfg.kf_max_dist)
{
if (++ctx->fixed_kf_cntr > ctx->cfg.kf_min_dist)
{
flags |= VPX_EFLAG_FORCE_KF;
ctx->fixed_kf_cntr = 1;
}
}
/* Initialize the encoder instance on the first frame*/
if (!res && ctx->cpi)
{
unsigned int lib_flags;
YV12_BUFFER_CONFIG sd;
int64_t dst_time_stamp, dst_end_time_stamp;
unsigned long size, cx_data_sz;
unsigned char *cx_data;
/* Set up internal flags */
if (ctx->base.init_flags & VPX_CODEC_USE_PSNR)
((VP8_COMP *)ctx->cpi)->b_calculate_psnr = 1;
if (ctx->base.init_flags & VPX_CODEC_USE_OUTPUT_PARTITION)
((VP8_COMP *)ctx->cpi)->output_partition = 1;
/* Convert API flags to internal codec lib flags */
lib_flags = (flags & VPX_EFLAG_FORCE_KF) ? FRAMEFLAGS_KEY : 0;
/* vp8 use 10,000,000 ticks/second as time stamp */
dst_time_stamp = pts * 10000000 * ctx->cfg.g_timebase.num / ctx->cfg.g_timebase.den;
dst_end_time_stamp = (pts + duration) * 10000000 * ctx->cfg.g_timebase.num / ctx->cfg.g_timebase.den;
if (img != NULL)
{
res = image2yuvconfig(img, &sd);
if (vp8_receive_raw_frame(ctx->cpi, ctx->next_frame_flag | lib_flags,
&sd, dst_time_stamp, dst_end_time_stamp))
{
VP8_COMP *cpi = (VP8_COMP *)ctx->cpi;
res = update_error_state(ctx, &cpi->common.error);
}
/* reset for next frame */
ctx->next_frame_flag = 0;
}
cx_data = ctx->cx_data;
cx_data_sz = ctx->cx_data_sz;
lib_flags = 0;
while (cx_data_sz >= ctx->cx_data_sz / 2
&& -1 != vp8_get_compressed_data(ctx->cpi, &lib_flags, &size, cx_data, &dst_time_stamp, &dst_end_time_stamp, !img))
{
if (size)
{
vpx_codec_pts_t round, delta;
vpx_codec_cx_pkt_t pkt;
VP8_COMP *cpi = (VP8_COMP *)ctx->cpi;
/* Add the frame packet to the list of returned packets. */
round = 1000000 * ctx->cfg.g_timebase.num / 2 - 1;
delta = (dst_end_time_stamp - dst_time_stamp);
pkt.kind = VPX_CODEC_CX_FRAME_PKT;
pkt.data.frame.pts =
(dst_time_stamp * ctx->cfg.g_timebase.den + round)
/ ctx->cfg.g_timebase.num / 10000000;
pkt.data.frame.duration =
(delta * ctx->cfg.g_timebase.den + round)
/ ctx->cfg.g_timebase.num / 10000000;
pkt.data.frame.flags = lib_flags << 16;
if (lib_flags & FRAMEFLAGS_KEY)
pkt.data.frame.flags |= VPX_FRAME_IS_KEY;
if (!cpi->common.show_frame)
{
pkt.data.frame.flags |= VPX_FRAME_IS_INVISIBLE;
// This timestamp should be as close as possible to the
// prior PTS so that if a decoder uses pts to schedule when
// to do this, we start right after last frame was decoded.
// Invisible frames have no duration.
pkt.data.frame.pts = ((cpi->last_time_stamp_seen
* ctx->cfg.g_timebase.den + round)
/ ctx->cfg.g_timebase.num / 10000000) + 1;
pkt.data.frame.duration = 0;
}
if (cpi->droppable)
pkt.data.frame.flags |= VPX_FRAME_IS_DROPPABLE;
if (cpi->output_partition)
{
int i;
const int num_partitions =
(1 << cpi->common.multi_token_partition) + 1;
pkt.data.frame.flags |= VPX_FRAME_IS_FRAGMENT;
for (i = 0; i < num_partitions; ++i)
{
pkt.data.frame.buf = cx_data;
pkt.data.frame.sz = cpi->partition_sz[i];
pkt.data.frame.partition_id = i;
/* don't set the fragment bit for the last partition */
if (i == (num_partitions - 1))
pkt.data.frame.flags &= ~VPX_FRAME_IS_FRAGMENT;
vpx_codec_pkt_list_add(&ctx->pkt_list.head, &pkt);
cx_data += cpi->partition_sz[i];
cx_data_sz -= cpi->partition_sz[i];
}
}
else
{
pkt.data.frame.buf = cx_data;
pkt.data.frame.sz = size;
pkt.data.frame.partition_id = -1;
vpx_codec_pkt_list_add(&ctx->pkt_list.head, &pkt);
cx_data += size;
cx_data_sz -= size;
}
//printf("timestamp: %lld, duration: %d\n", pkt->data.frame.pts, pkt->data.frame.duration);
}
}
}
return res;
}
static const vpx_codec_cx_pkt_t *vp8e_get_cxdata(vpx_codec_alg_priv_t *ctx,
vpx_codec_iter_t *iter)
{
return vpx_codec_pkt_list_get(&ctx->pkt_list.head, iter);
}
static vpx_codec_err_t vp8e_set_reference(vpx_codec_alg_priv_t *ctx,
int ctr_id,
va_list args)
{
vpx_ref_frame_t *data = va_arg(args, vpx_ref_frame_t *);
if (data)
{
vpx_ref_frame_t *frame = (vpx_ref_frame_t *)data;
YV12_BUFFER_CONFIG sd;
image2yuvconfig(&frame->img, &sd);
vp8_set_reference(ctx->cpi, frame->frame_type, &sd);
return VPX_CODEC_OK;
}
else
return VPX_CODEC_INVALID_PARAM;
}
static vpx_codec_err_t vp8e_get_reference(vpx_codec_alg_priv_t *ctx,
int ctr_id,
va_list args)
{
vpx_ref_frame_t *data = va_arg(args, vpx_ref_frame_t *);
if (data)
{
vpx_ref_frame_t *frame = (vpx_ref_frame_t *)data;
YV12_BUFFER_CONFIG sd;
image2yuvconfig(&frame->img, &sd);
vp8_get_reference(ctx->cpi, frame->frame_type, &sd);
return VPX_CODEC_OK;
}
else
return VPX_CODEC_INVALID_PARAM;
}
static vpx_codec_err_t vp8e_set_previewpp(vpx_codec_alg_priv_t *ctx,
int ctr_id,
va_list args)
{
#if CONFIG_POSTPROC
vp8_postproc_cfg_t *data = va_arg(args, vp8_postproc_cfg_t *);
(void)ctr_id;
if (data)
{
ctx->preview_ppcfg = *((vp8_postproc_cfg_t *)data);
return VPX_CODEC_OK;
}
else
return VPX_CODEC_INVALID_PARAM;
#else
(void)ctx;
(void)ctr_id;
(void)args;
return VPX_CODEC_INCAPABLE;
#endif
}
static vpx_image_t *vp8e_get_preview(vpx_codec_alg_priv_t *ctx)
{
YV12_BUFFER_CONFIG sd;
vp8_ppflags_t flags = {0};
if (ctx->preview_ppcfg.post_proc_flag)
{
flags.post_proc_flag = ctx->preview_ppcfg.post_proc_flag;
flags.deblocking_level = ctx->preview_ppcfg.deblocking_level;
flags.noise_level = ctx->preview_ppcfg.noise_level;
}
if (0 == vp8_get_preview_raw_frame(ctx->cpi, &sd, &flags))
{
/*
vpx_img_wrap(&ctx->preview_img, VPX_IMG_FMT_YV12,
sd.y_width + 2*VP8BORDERINPIXELS,
sd.y_height + 2*VP8BORDERINPIXELS,
1,
sd.buffer_alloc);
vpx_img_set_rect(&ctx->preview_img,
VP8BORDERINPIXELS, VP8BORDERINPIXELS,
sd.y_width, sd.y_height);
*/
ctx->preview_img.bps = 12;
ctx->preview_img.planes[VPX_PLANE_Y] = sd.y_buffer;
ctx->preview_img.planes[VPX_PLANE_U] = sd.u_buffer;
ctx->preview_img.planes[VPX_PLANE_V] = sd.v_buffer;
if (sd.clrtype == REG_YUV)
ctx->preview_img.fmt = VPX_IMG_FMT_I420;
else
ctx->preview_img.fmt = VPX_IMG_FMT_VPXI420;
ctx->preview_img.x_chroma_shift = 1;
ctx->preview_img.y_chroma_shift = 1;
ctx->preview_img.d_w = sd.y_width;
ctx->preview_img.d_h = sd.y_height;
ctx->preview_img.stride[VPX_PLANE_Y] = sd.y_stride;
ctx->preview_img.stride[VPX_PLANE_U] = sd.uv_stride;
ctx->preview_img.stride[VPX_PLANE_V] = sd.uv_stride;
ctx->preview_img.w = sd.y_width;
ctx->preview_img.h = sd.y_height;
return &ctx->preview_img;
}
else
return NULL;
}
static vpx_codec_err_t vp8e_update_entropy(vpx_codec_alg_priv_t *ctx,
int ctr_id,
va_list args)
{
int update = va_arg(args, int);
vp8_update_entropy(ctx->cpi, update);
return VPX_CODEC_OK;
}
static vpx_codec_err_t vp8e_update_reference(vpx_codec_alg_priv_t *ctx,
int ctr_id,
va_list args)
{
int update = va_arg(args, int);
vp8_update_reference(ctx->cpi, update);
return VPX_CODEC_OK;
}
static vpx_codec_err_t vp8e_use_reference(vpx_codec_alg_priv_t *ctx,
int ctr_id,
va_list args)
{
int reference_flag = va_arg(args, int);
vp8_use_as_reference(ctx->cpi, reference_flag);
return VPX_CODEC_OK;
}
static vpx_codec_err_t vp8e_set_roi_map(vpx_codec_alg_priv_t *ctx,
int ctr_id,
va_list args)
{
vpx_roi_map_t *data = va_arg(args, vpx_roi_map_t *);
if (data)
{
vpx_roi_map_t *roi = (vpx_roi_map_t *)data;
if (!vp8_set_roimap(ctx->cpi, roi->roi_map, roi->rows, roi->cols, roi->delta_q, roi->delta_lf, roi->static_threshold))
return VPX_CODEC_OK;
else
return VPX_CODEC_INVALID_PARAM;
}
else
return VPX_CODEC_INVALID_PARAM;
}
static vpx_codec_err_t vp8e_set_activemap(vpx_codec_alg_priv_t *ctx,
int ctr_id,
va_list args)
{
vpx_active_map_t *data = va_arg(args, vpx_active_map_t *);
if (data)
{
vpx_active_map_t *map = (vpx_active_map_t *)data;
if (!vp8_set_active_map(ctx->cpi, map->active_map, map->rows, map->cols))
return VPX_CODEC_OK;
else
return VPX_CODEC_INVALID_PARAM;
}
else
return VPX_CODEC_INVALID_PARAM;
}
static vpx_codec_err_t vp8e_set_scalemode(vpx_codec_alg_priv_t *ctx,
int ctr_id,
va_list args)
{
vpx_scaling_mode_t *data = va_arg(args, vpx_scaling_mode_t *);
if (data)
{
int res;
vpx_scaling_mode_t scalemode = *(vpx_scaling_mode_t *)data ;
res = vp8_set_internal_size(ctx->cpi, scalemode.h_scaling_mode, scalemode.v_scaling_mode);
if (!res)
{
/*force next frame a key frame to effect scaling mode */
ctx->next_frame_flag |= FRAMEFLAGS_KEY;
return VPX_CODEC_OK;
}
else
return VPX_CODEC_INVALID_PARAM;
}
else
return VPX_CODEC_INVALID_PARAM;
}
static vpx_codec_ctrl_fn_map_t vp8e_ctf_maps[] =
{
{VP8_SET_REFERENCE, vp8e_set_reference},
{VP8_COPY_REFERENCE, vp8e_get_reference},
{VP8_SET_POSTPROC, vp8e_set_previewpp},
{VP8E_UPD_ENTROPY, vp8e_update_entropy},
{VP8E_UPD_REFERENCE, vp8e_update_reference},
{VP8E_USE_REFERENCE, vp8e_use_reference},
{VP8E_SET_ROI_MAP, vp8e_set_roi_map},
{VP8E_SET_ACTIVEMAP, vp8e_set_activemap},
{VP8E_SET_SCALEMODE, vp8e_set_scalemode},
{VP8E_SET_ENCODING_MODE, set_param},
{VP8E_SET_CPUUSED, set_param},
{VP8E_SET_NOISE_SENSITIVITY, set_param},
{VP8E_SET_ENABLEAUTOALTREF, set_param},
{VP8E_SET_SHARPNESS, set_param},
{VP8E_SET_STATIC_THRESHOLD, set_param},
{VP8E_SET_TOKEN_PARTITIONS, set_param},
{VP8E_GET_LAST_QUANTIZER, get_param},
{VP8E_GET_LAST_QUANTIZER_64, get_param},
{VP8E_SET_ARNR_MAXFRAMES, set_param},
{VP8E_SET_ARNR_STRENGTH , set_param},
{VP8E_SET_ARNR_TYPE , set_param},
{VP8E_SET_TUNING, set_param},
{VP8E_SET_CQ_LEVEL, set_param},
{VP8E_SET_MAX_INTRA_BITRATE_PCT, set_param},
{ -1, NULL},
};
static vpx_codec_enc_cfg_map_t vp8e_usage_cfg_map[] =
{
{
0,
{
0, /* g_usage */
0, /* g_threads */
0, /* g_profile */
320, /* g_width */
240, /* g_height */
{1, 30}, /* g_timebase */
0, /* g_error_resilient */
VPX_RC_ONE_PASS, /* g_pass */
0, /* g_lag_in_frames */
0, /* rc_dropframe_thresh */
0, /* rc_resize_allowed */
60, /* rc_resize_down_thresold */
30, /* rc_resize_up_thresold */
VPX_VBR, /* rc_end_usage */
#if VPX_ENCODER_ABI_VERSION > (1 + VPX_CODEC_ABI_VERSION)
{0}, /* rc_twopass_stats_in */
#endif
256, /* rc_target_bandwidth */
4, /* rc_min_quantizer */
63, /* rc_max_quantizer */
100, /* rc_undershoot_pct */
100, /* rc_overshoot_pct */
6000, /* rc_max_buffer_size */
4000, /* rc_buffer_initial_size; */
5000, /* rc_buffer_optimal_size; */
50, /* rc_two_pass_vbrbias */
0, /* rc_two_pass_vbrmin_section */
400, /* rc_two_pass_vbrmax_section */
/* keyframing settings (kf) */
VPX_KF_AUTO, /* g_kfmode*/
0, /* kf_min_dist */
9999, /* kf_max_dist */
#if VPX_ENCODER_ABI_VERSION == (1 + VPX_CODEC_ABI_VERSION)
1, /* g_delete_first_pass_file */
"vp8.fpf" /* first pass filename */
#endif
}},
{ -1, {NOT_IMPLEMENTED}}
};
#ifndef VERSION_STRING
#define VERSION_STRING
#endif
CODEC_INTERFACE(vpx_codec_vp8_cx) =
{
"WebM Project VP8 Encoder" VERSION_STRING,
VPX_CODEC_INTERNAL_ABI_VERSION,
VPX_CODEC_CAP_ENCODER | VPX_CODEC_CAP_PSNR |
VPX_CODEC_CAP_OUTPUT_PARTITION,
/* vpx_codec_caps_t caps; */
vp8e_init, /* vpx_codec_init_fn_t init; */
vp8e_destroy, /* vpx_codec_destroy_fn_t destroy; */
vp8e_ctf_maps, /* vpx_codec_ctrl_fn_map_t *ctrl_maps; */
NOT_IMPLEMENTED, /* vpx_codec_get_mmap_fn_t get_mmap; */
NOT_IMPLEMENTED, /* vpx_codec_set_mmap_fn_t set_mmap; */
{
NOT_IMPLEMENTED, /* vpx_codec_peek_si_fn_t peek_si; */
NOT_IMPLEMENTED, /* vpx_codec_get_si_fn_t get_si; */
NOT_IMPLEMENTED, /* vpx_codec_decode_fn_t decode; */
NOT_IMPLEMENTED, /* vpx_codec_frame_get_fn_t frame_get; */
},
{
vp8e_usage_cfg_map, /* vpx_codec_enc_cfg_map_t peek_si; */
vp8e_encode, /* vpx_codec_encode_fn_t encode; */
vp8e_get_cxdata, /* vpx_codec_get_cx_data_fn_t frame_get; */
vp8e_set_config,
NOT_IMPLEMENTED,
vp8e_get_preview,
} /* encoder functions */
};
#if CONFIG_EXPERIMENTAL
vpx_codec_iface_t vpx_codec_vp8x_cx_algo =
{
"VP8 Experimental Encoder" VERSION_STRING,
VPX_CODEC_INTERNAL_ABI_VERSION,
VPX_CODEC_CAP_ENCODER | VPX_CODEC_CAP_PSNR,
/* vpx_codec_caps_t caps; */
vp8e_exp_init, /* vpx_codec_init_fn_t init; */
vp8e_destroy, /* vpx_codec_destroy_fn_t destroy; */
vp8e_ctf_maps, /* vpx_codec_ctrl_fn_map_t *ctrl_maps; */
NOT_IMPLEMENTED, /* vpx_codec_get_mmap_fn_t get_mmap; */
NOT_IMPLEMENTED, /* vpx_codec_set_mmap_fn_t set_mmap; */
{
NOT_IMPLEMENTED, /* vpx_codec_peek_si_fn_t peek_si; */
NOT_IMPLEMENTED, /* vpx_codec_get_si_fn_t get_si; */
NOT_IMPLEMENTED, /* vpx_codec_decode_fn_t decode; */
NOT_IMPLEMENTED, /* vpx_codec_frame_get_fn_t frame_get; */
},
{
vp8e_usage_cfg_map, /* vpx_codec_enc_cfg_map_t peek_si; */
vp8e_encode, /* vpx_codec_encode_fn_t encode; */
vp8e_get_cxdata, /* vpx_codec_get_cx_data_fn_t frame_get; */
vp8e_set_config,
NOT_IMPLEMENTED,
vp8e_get_preview,
} /* encoder functions */
};
#endif
/*
* BEGIN BACKWARDS COMPATIBILITY SHIM.
*/
#define FORCE_KEY 2
static vpx_codec_err_t api1_control(vpx_codec_alg_priv_t *ctx,
int ctrl_id,
va_list args)
{
vpx_codec_ctrl_fn_map_t *entry;
switch (ctrl_id)
{
case VP8E_SET_FLUSHFLAG:
/* VP8 sample code did VP8E_SET_FLUSHFLAG followed by
* vpx_codec_get_cx_data() rather than vpx_codec_encode().
*/
return vp8e_encode(ctx, NULL, 0, 0, 0, 0);
case VP8E_SET_FRAMETYPE:
ctx->base.enc.tbd |= FORCE_KEY;
return VPX_CODEC_OK;
}
for (entry = vp8e_ctf_maps; entry && entry->fn; entry++)
{
if (!entry->ctrl_id || entry->ctrl_id == ctrl_id)
{
return entry->fn(ctx, ctrl_id, args);
}
}
return VPX_CODEC_ERROR;
}
static vpx_codec_ctrl_fn_map_t api1_ctrl_maps[] =
{
{0, api1_control},
{ -1, NULL}
};
static vpx_codec_err_t api1_encode(vpx_codec_alg_priv_t *ctx,
const vpx_image_t *img,
vpx_codec_pts_t pts,
unsigned long duration,
vpx_enc_frame_flags_t flags,
unsigned long deadline)
{
int force = ctx->base.enc.tbd;
ctx->base.enc.tbd = 0;
return vp8e_encode
(ctx,
img,
pts,
duration,
flags | ((force & FORCE_KEY) ? VPX_EFLAG_FORCE_KF : 0),
deadline);
}
vpx_codec_iface_t vpx_enc_vp8_algo =
{
"WebM Project VP8 Encoder (Deprecated API)" VERSION_STRING,
VPX_CODEC_INTERNAL_ABI_VERSION,
VPX_CODEC_CAP_ENCODER,
/* vpx_codec_caps_t caps; */
vp8e_init, /* vpx_codec_init_fn_t init; */
vp8e_destroy, /* vpx_codec_destroy_fn_t destroy; */
api1_ctrl_maps, /* vpx_codec_ctrl_fn_map_t *ctrl_maps; */
NOT_IMPLEMENTED, /* vpx_codec_get_mmap_fn_t get_mmap; */
NOT_IMPLEMENTED, /* vpx_codec_set_mmap_fn_t set_mmap; */
{NOT_IMPLEMENTED}, /* decoder functions */
{
vp8e_usage_cfg_map, /* vpx_codec_enc_cfg_map_t peek_si; */
api1_encode, /* vpx_codec_encode_fn_t encode; */
vp8e_get_cxdata, /* vpx_codec_get_cx_data_fn_t frame_get; */
vp8e_set_config,
NOT_IMPLEMENTED,
vp8e_get_preview,
} /* encoder functions */
};
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