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/*
* AVS encoding using the xavs library
* Copyright (C) 2010 Amanda, Y.N. Wu <amanda11192003@gmail.com>
*
* This file is part of FFmpeg.
*
* FFmpeg is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* FFmpeg 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with FFmpeg; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <math.h>
#include <stdint.h>
#include <xavs.h>
#include "avcodec.h"
#define END_OF_STREAM 0x001
#define XAVS_PART_I8X8 0x002 /* Analyze i8x8 (requires 8x8 transform) */
#define XAVS_PART_P8X8 0x010 /* Analyze p16x8, p8x16 and p8x8 */
#define XAVS_PART_B8X8 0x100 /* Analyze b16x8, b*/
typedef struct XavsContext {
xavs_param_t params;
xavs_t *enc;
xavs_picture_t pic;
uint8_t *sei;
int sei_size;
AVFrame out_pic;
int end_of_stream;
} XavsContext;
static void XAVS_log(void *p, int level, const char *fmt, va_list args)
{
static const int level_map[] = {
[XAVS_LOG_ERROR] = AV_LOG_ERROR,
[XAVS_LOG_WARNING] = AV_LOG_WARNING,
[XAVS_LOG_INFO] = AV_LOG_INFO,
[XAVS_LOG_DEBUG] = AV_LOG_DEBUG
};
if (level < 0 || level > XAVS_LOG_DEBUG)
return;
av_vlog(p, level_map[level], fmt, args);
}
static int encode_nals(AVCodecContext *ctx, uint8_t *buf,
int size, xavs_nal_t *nals,
int nnal, int skip_sei)
{
XavsContext *x4 = ctx->priv_data;
uint8_t *p = buf;
int i, s;
/* Write the SEI as part of the first frame. */
if (x4->sei_size > 0 && nnal > 0) {
memcpy(p, x4->sei, x4->sei_size);
p += x4->sei_size;
x4->sei_size = 0;
}
for (i = 0; i < nnal; i++) {
/* Don't put the SEI in extradata. */
if (skip_sei && nals[i].i_type == NAL_SEI) {
x4->sei = av_malloc( 5 + nals[i].i_payload * 4 / 3 );
if (xavs_nal_encode(x4->sei, &x4->sei_size, 1, nals + i) < 0)
return -1;
continue;
}
s = xavs_nal_encode(p, &size, 1, nals + i);
if (s < 0)
return -1;
p += s;
}
return p - buf;
}
static int XAVS_frame(AVCodecContext *ctx, uint8_t *buf,
int bufsize, void *data)
{
XavsContext *x4 = ctx->priv_data;
AVFrame *frame = data;
xavs_nal_t *nal;
int nnal, i;
xavs_picture_t pic_out;
x4->pic.img.i_csp = XAVS_CSP_I420;
x4->pic.img.i_plane = 3;
if (frame) {
for (i = 0; i < 3; i++) {
x4->pic.img.plane[i] = frame->data[i];
x4->pic.img.i_stride[i] = frame->linesize[i];
}
x4->pic.i_pts = frame->pts;
x4->pic.i_type = XAVS_TYPE_AUTO;
}
if (xavs_encoder_encode(x4->enc, &nal, &nnal,
frame? &x4->pic: NULL, &pic_out) < 0)
return -1;
bufsize = encode_nals(ctx, buf, bufsize, nal, nnal, 0);
if (bufsize < 0)
return -1;
if (!bufsize && !frame && !(x4->end_of_stream)){
buf[bufsize] = 0x0;
buf[bufsize+1] = 0x0;
buf[bufsize+2] = 0x01;
buf[bufsize+3] = 0xb1;
bufsize += 4;
x4->end_of_stream = END_OF_STREAM;
return bufsize;
}
/* FIXME: libxavs now provides DTS */
/* but AVFrame doesn't have a field for it. */
x4->out_pic.pts = pic_out.i_pts;
switch (pic_out.i_type) {
case XAVS_TYPE_IDR:
case XAVS_TYPE_I:
x4->out_pic.pict_type = FF_I_TYPE;
break;
case XAVS_TYPE_P:
x4->out_pic.pict_type = FF_P_TYPE;
break;
case XAVS_TYPE_B:
case XAVS_TYPE_BREF:
x4->out_pic.pict_type = FF_B_TYPE;
break;
}
/* There is no IDR frame in AVS JiZhun */
/* Sequence header is used as a flag */
x4->out_pic.key_frame = pic_out.i_type == XAVS_TYPE_I;
x4->out_pic.quality = (pic_out.i_qpplus1 - 1) * FF_QP2LAMBDA;
return bufsize;
}
static av_cold int XAVS_close(AVCodecContext *avctx)
{
XavsContext *x4 = avctx->priv_data;
av_freep(&avctx->extradata);
av_free(x4->sei);
if (x4->enc)
xavs_encoder_close(x4->enc);
return 0;
}
static av_cold int XAVS_init(AVCodecContext *avctx)
{
XavsContext *x4 = avctx->priv_data;
x4->sei_size = 0;
xavs_param_default(&x4->params);
x4->params.pf_log = XAVS_log;
x4->params.p_log_private = avctx;
x4->params.i_keyint_max = avctx->gop_size;
x4->params.rc.i_bitrate = avctx->bit_rate / 1000;
x4->params.rc.i_vbv_buffer_size = avctx->rc_buffer_size / 1000;
x4->params.rc.i_vbv_max_bitrate = avctx->rc_max_rate / 1000;
x4->params.rc.b_stat_write = avctx->flags & CODEC_FLAG_PASS1;
if (avctx->flags & CODEC_FLAG_PASS2) {
x4->params.rc.b_stat_read = 1;
} else {
if (avctx->crf) {
x4->params.rc.i_rc_method = XAVS_RC_CRF;
x4->params.rc.f_rf_constant = avctx->crf;
} else if (avctx->cqp > -1) {
x4->params.rc.i_rc_method = XAVS_RC_CQP;
x4->params.rc.i_qp_constant = avctx->cqp;
}
}
/* if neither crf nor cqp modes are selected we have to enable the RC */
/* we do it this way because we cannot check if the bitrate has been set */
if (!(avctx->crf || (avctx->cqp > -1)))
x4->params.rc.i_rc_method = XAVS_RC_ABR;
x4->params.i_bframe = avctx->max_b_frames;
/* cabac is not included in AVS JiZhun Profile */
x4->params.b_cabac = 0;
x4->params.i_bframe_adaptive = avctx->b_frame_strategy;
x4->params.i_bframe_bias = avctx->bframebias;
avctx->has_b_frames = !!avctx->max_b_frames;
/* AVS doesn't allow B picture as reference */
/* The max allowed reference frame number of B is 2 */
x4->params.i_keyint_min = avctx->keyint_min;
if (x4->params.i_keyint_min > x4->params.i_keyint_max)
x4->params.i_keyint_min = x4->params.i_keyint_max;
x4->params.i_scenecut_threshold = avctx->scenechange_threshold;
// x4->params.b_deblocking_filter = avctx->flags & CODEC_FLAG_LOOP_FILTER;
x4->params.i_deblocking_filter_alphac0 = avctx->deblockalpha;
x4->params.i_deblocking_filter_beta = avctx->deblockbeta;
x4->params.rc.i_qp_min = avctx->qmin;
x4->params.rc.i_qp_max = avctx->qmax;
x4->params.rc.i_qp_step = avctx->max_qdiff;
x4->params.rc.f_qcompress = avctx->qcompress; /* 0.0 => cbr, 1.0 => constant qp */
x4->params.rc.f_qblur = avctx->qblur; /* temporally blur quants */
x4->params.rc.f_complexity_blur = avctx->complexityblur;
x4->params.i_frame_reference = avctx->refs;
x4->params.i_width = avctx->width;
x4->params.i_height = avctx->height;
x4->params.vui.i_sar_width = avctx->sample_aspect_ratio.num;
x4->params.vui.i_sar_height = avctx->sample_aspect_ratio.den;
/* This is only used for counting the fps */
x4->params.i_fps_num = avctx->time_base.den;
x4->params.i_fps_den = avctx->time_base.num;
x4->params.analyse.inter = XAVS_ANALYSE_I8x8 |XAVS_ANALYSE_PSUB16x16| XAVS_ANALYSE_BSUB16x16;
if (avctx->partitions) {
if (avctx->partitions & XAVS_PART_I8X8)
x4->params.analyse.inter |= XAVS_ANALYSE_I8x8;
if (avctx->partitions & XAVS_PART_P8X8)
x4->params.analyse.inter |= XAVS_ANALYSE_PSUB16x16;
if (avctx->partitions & XAVS_PART_B8X8)
x4->params.analyse.inter |= XAVS_ANALYSE_BSUB16x16;
}
x4->params.analyse.i_direct_mv_pred = avctx->directpred;
x4->params.analyse.b_weighted_bipred = avctx->flags2 & CODEC_FLAG2_WPRED;
switch (avctx->me_method) {
case ME_EPZS:
x4->params.analyse.i_me_method = XAVS_ME_DIA;
break;
case ME_HEX:
x4->params.analyse.i_me_method = XAVS_ME_HEX;
break;
case ME_UMH:
x4->params.analyse.i_me_method = XAVS_ME_UMH;
break;
case ME_FULL:
x4->params.analyse.i_me_method = XAVS_ME_ESA;
break;
case ME_TESA:
x4->params.analyse.i_me_method = XAVS_ME_TESA;
break;
default:
x4->params.analyse.i_me_method = XAVS_ME_HEX;
}
x4->params.analyse.i_me_range = avctx->me_range;
x4->params.analyse.i_subpel_refine = avctx->me_subpel_quality;
x4->params.analyse.b_mixed_references = avctx->flags2 & CODEC_FLAG2_MIXED_REFS;
x4->params.analyse.b_chroma_me = avctx->me_cmp & FF_CMP_CHROMA;
/* AVS P2 only enables 8x8 transform */
x4->params.analyse.b_transform_8x8 = 1; //avctx->flags2 & CODEC_FLAG2_8X8DCT;
x4->params.analyse.b_fast_pskip = avctx->flags2 & CODEC_FLAG2_FASTPSKIP;
x4->params.analyse.i_trellis = avctx->trellis;
x4->params.analyse.i_noise_reduction = avctx->noise_reduction;
if (avctx->level > 0)
x4->params.i_level_idc = avctx->level;
x4->params.rc.f_rate_tolerance =
(float)avctx->bit_rate_tolerance/avctx->bit_rate;
if ((avctx->rc_buffer_size) &&
(avctx->rc_initial_buffer_occupancy <= avctx->rc_buffer_size)) {
x4->params.rc.f_vbv_buffer_init =
(float)avctx->rc_initial_buffer_occupancy / avctx->rc_buffer_size;
} else
x4->params.rc.f_vbv_buffer_init = 0.9;
/* TAG:do we have MB tree RC method */
/* what is the RC method we are now using? Default NO */
x4->params.rc.b_mb_tree = !!(avctx->flags2 & CODEC_FLAG2_MBTREE);
x4->params.rc.f_ip_factor = 1 / fabs(avctx->i_quant_factor);
x4->params.rc.f_pb_factor = avctx->b_quant_factor;
x4->params.analyse.i_chroma_qp_offset = avctx->chromaoffset;
x4->params.analyse.b_psnr = avctx->flags & CODEC_FLAG_PSNR;
x4->params.i_log_level = XAVS_LOG_DEBUG;
x4->params.b_aud = avctx->flags2 & CODEC_FLAG2_AUD;
x4->params.i_threads = avctx->thread_count;
x4->params.b_interlaced = avctx->flags & CODEC_FLAG_INTERLACED_DCT;
if (avctx->flags & CODEC_FLAG_GLOBAL_HEADER)
x4->params.b_repeat_headers = 0;
x4->enc = xavs_encoder_open(&x4->params);
if (!x4->enc)
return -1;
avctx->coded_frame = &x4->out_pic;
/* TAG: Do we have GLOBAL HEADER in AVS */
/* We Have PPS and SPS in AVS */
if (avctx->flags & CODEC_FLAG_GLOBAL_HEADER) {
xavs_nal_t *nal;
int nnal, s;
s = xavs_encoder_headers(x4->enc, &nal, &nnal);
avctx->extradata = av_malloc(s);
avctx->extradata_size = encode_nals(avctx, avctx->extradata, s, nal, nnal, 1);
}
return 0;
}
AVCodec libxavs_encoder = {
.name = "libxavs",
.type = AVMEDIA_TYPE_VIDEO,
.id = CODEC_ID_CAVS,
.priv_data_size = sizeof(XavsContext),
.init = XAVS_init,
.encode = XAVS_frame,
.close = XAVS_close,
.capabilities = CODEC_CAP_DELAY,
.pix_fmts = (const enum PixelFormat[]) { PIX_FMT_YUV420P, PIX_FMT_NONE },
.long_name = NULL_IF_CONFIG_SMALL("libxavs - the Chinese Audio Video Standard Encoder"),
};
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