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/**
* @file av1/encode.c AV1 Encode
*
* Copyright (C) 2010 - 2016 Creytiv.com
*/
#include <string.h>
#include <re.h>
#include <rem.h>
#include <baresip.h>
#include <aom/aom.h>
#include <aom/aom_encoder.h>
#include <aom/aomcx.h>
#include "av1.h"
enum {
HDR_SIZE = 4,
};
struct videnc_state {
aom_codec_ctx_t ctx;
struct vidsz size;
aom_codec_pts_t pts;
unsigned fps;
unsigned bitrate;
unsigned pktsize;
bool ctxup;
uint16_t picid;
videnc_packet_h *pkth;
void *arg;
};
static void destructor(void *arg)
{
struct videnc_state *ves = arg;
if (ves->ctxup)
aom_codec_destroy(&ves->ctx);
}
int av1_encode_update(struct videnc_state **vesp, const struct vidcodec *vc,
struct videnc_param *prm, const char *fmtp,
videnc_packet_h *pkth, void *arg)
{
struct videnc_state *ves;
if (!vesp || !vc || !prm || prm->pktsize < (HDR_SIZE + 1))
return EINVAL;
ves = *vesp;
if (!ves) {
ves = mem_zalloc(sizeof(*ves), destructor);
if (!ves)
return ENOMEM;
ves->picid = rand_u16();
*vesp = ves;
}
else {
if (ves->ctxup && (ves->bitrate != prm->bitrate ||
ves->fps != prm->fps)) {
aom_codec_destroy(&ves->ctx);
ves->ctxup = false;
}
}
ves->bitrate = prm->bitrate;
ves->pktsize = prm->pktsize;
ves->fps = prm->fps;
ves->pkth = pkth;
ves->arg = arg;
return 0;
}
static int open_encoder(struct videnc_state *ves, const struct vidsz *size)
{
aom_codec_enc_cfg_t cfg;
aom_codec_err_t res;
res = aom_codec_enc_config_default(&aom_codec_av1_cx_algo, &cfg, 0);
if (res)
return EPROTO;
cfg.g_w = size->w;
cfg.g_h = size->h;
cfg.g_timebase.num = 1;
cfg.g_timebase.den = ves->fps;
cfg.g_error_resilient = AOM_ERROR_RESILIENT_DEFAULT;
cfg.g_pass = AOM_RC_ONE_PASS;
cfg.g_lag_in_frames = 0;
cfg.rc_end_usage = AOM_VBR;
cfg.rc_target_bitrate = ves->bitrate;
cfg.kf_mode = AOM_KF_AUTO;
if (ves->ctxup) {
debug("av1: re-opening encoder\n");
aom_codec_destroy(&ves->ctx);
ves->ctxup = false;
}
res = aom_codec_enc_init(&ves->ctx, &aom_codec_av1_cx_algo, &cfg,
0);
if (res) {
warning("av1: enc init: %s\n", aom_codec_err_to_string(res));
return EPROTO;
}
ves->ctxup = true;
res = aom_codec_control(&ves->ctx, AOME_SET_CPUUSED, 8);
if (res) {
warning("av1: codec ctrl C: %s\n",
aom_codec_err_to_string(res));
}
return 0;
}
static inline void hdr_encode(uint8_t hdr[HDR_SIZE], bool noref, bool start,
uint8_t partid, uint16_t picid)
{
hdr[0] = 1<<7 | noref<<5 | start<<4 | (partid & 0x7);
hdr[1] = 1<<7;
hdr[2] = 1<<7 | (picid>>8 & 0x7f);
hdr[3] = picid & 0xff;
}
static inline int packetize(bool marker, uint64_t rtp_ts,
const uint8_t *buf, size_t len,
size_t maxlen, bool noref, uint8_t partid,
uint16_t picid, videnc_packet_h *pkth, void *arg)
{
uint8_t hdr[HDR_SIZE];
bool start = true;
int err = 0;
maxlen -= sizeof(hdr);
while (len > maxlen) {
hdr_encode(hdr, noref, start, partid, picid);
err |= pkth(false, rtp_ts, hdr, sizeof(hdr), buf, maxlen, arg);
buf += maxlen;
len -= maxlen;
start = false;
}
hdr_encode(hdr, noref, start, partid, picid);
err |= pkth(marker, rtp_ts, hdr, sizeof(hdr), buf, len, arg);
return err;
}
int av1_encode(struct videnc_state *ves, bool update,
const struct vidframe *frame)
{
aom_enc_frame_flags_t flags = 0;
aom_codec_iter_t iter = NULL;
aom_codec_err_t res;
aom_image_t *img;
aom_img_fmt_t img_fmt;
int err = 0, i;
if (!ves || !frame || frame->fmt != VID_FMT_YUV420P)
return EINVAL;
if (!ves->ctxup || !vidsz_cmp(&ves->size, &frame->size)) {
err = open_encoder(ves, &frame->size);
if (err)
return err;
ves->size = frame->size;
}
if (update) {
/* debug("av1: picture update\n"); */
flags |= AOM_EFLAG_FORCE_KF;
}
img_fmt = AOM_IMG_FMT_I420;
img = aom_img_wrap(NULL, img_fmt, frame->size.w, frame->size.h,
16, NULL);
if (!img) {
warning("vp9: encoder: could not allocate image\n");
err = ENOMEM;
goto out;
}
for (i=0; i<4; i++) {
img->stride[i] = frame->linesize[i];
img->planes[i] = frame->data[i];
}
res = aom_codec_encode(&ves->ctx, img, ves->pts++, 1,
flags);
if (res) {
warning("av1: enc error: %s\n", aom_codec_err_to_string(res));
return ENOMEM;
}
++ves->picid;
for (;;) {
bool keyframe = false, marker = true;
const aom_codec_cx_pkt_t *pkt;
uint8_t partid = 0;
uint64_t ts;
pkt = aom_codec_get_cx_data(&ves->ctx, &iter);
if (!pkt)
break;
if (pkt->kind != AOM_CODEC_CX_FRAME_PKT)
continue;
if (pkt->data.frame.flags & AOM_FRAME_IS_KEY)
keyframe = true;
if (pkt->data.frame.flags & AOM_FRAME_IS_FRAGMENT)
marker = false;
if (pkt->data.frame.partition_id >= 0)
partid = pkt->data.frame.partition_id;
ts = video_calc_rtp_timestamp(pkt->data.frame.pts, ves->fps);
err = packetize(marker, ts,
pkt->data.frame.buf,
pkt->data.frame.sz,
ves->pktsize, !keyframe, partid, ves->picid,
ves->pkth, ves->arg);
if (err)
return err;
}
out:
if (img)
aom_img_free(img);
return err;
}
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