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FFmpeg/libavcodec/libx265.c

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/*
* libx265 encoder
*
* Copyright (c) 2013-2014 Derek Buitenhuis
*
* 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
*/
#if defined(_MSC_VER)
#define X265_API_IMPORTS 1
#endif
#include <x265.h>
#include <float.h>
#include "libavutil/internal.h"
#include "libavutil/common.h"
#include "libavutil/opt.h"
#include "libavutil/pixdesc.h"
#include "avcodec.h"
#include "internal.h"
typedef struct libx265Context {
const AVClass *class;
x265_encoder *encoder;
x265_param *params;
const x265_api *api;
float crf;
int forced_idr;
char *preset;
char *tune;
char *profile;
char *x265_opts;
} libx265Context;
static int is_keyframe(NalUnitType naltype)
{
switch (naltype) {
case NAL_UNIT_CODED_SLICE_BLA_W_LP:
case NAL_UNIT_CODED_SLICE_BLA_W_RADL:
case NAL_UNIT_CODED_SLICE_BLA_N_LP:
case NAL_UNIT_CODED_SLICE_IDR_W_RADL:
case NAL_UNIT_CODED_SLICE_IDR_N_LP:
case NAL_UNIT_CODED_SLICE_CRA:
return 1;
default:
return 0;
}
}
static av_cold int libx265_encode_close(AVCodecContext *avctx)
{
libx265Context *ctx = avctx->priv_data;
ctx->api->param_free(ctx->params);
if (ctx->encoder)
ctx->api->encoder_close(ctx->encoder);
return 0;
}
static av_cold int libx265_encode_init(AVCodecContext *avctx)
{
libx265Context *ctx = avctx->priv_data;
AVCPBProperties *cpb_props = NULL;
ctx->api = x265_api_get(av_pix_fmt_desc_get(avctx->pix_fmt)->comp[0].depth);
if (!ctx->api)
ctx->api = x265_api_get(0);
ctx->params = ctx->api->param_alloc();
if (!ctx->params) {
av_log(avctx, AV_LOG_ERROR, "Could not allocate x265 param structure.\n");
return AVERROR(ENOMEM);
}
if (ctx->api->param_default_preset(ctx->params, ctx->preset, ctx->tune) < 0) {
int i;
av_log(avctx, AV_LOG_ERROR, "Error setting preset/tune %s/%s.\n", ctx->preset, ctx->tune);
av_log(avctx, AV_LOG_INFO, "Possible presets:");
for (i = 0; x265_preset_names[i]; i++)
av_log(avctx, AV_LOG_INFO, " %s", x265_preset_names[i]);
av_log(avctx, AV_LOG_INFO, "\n");
av_log(avctx, AV_LOG_INFO, "Possible tunes:");
for (i = 0; x265_tune_names[i]; i++)
av_log(avctx, AV_LOG_INFO, " %s", x265_tune_names[i]);
av_log(avctx, AV_LOG_INFO, "\n");
return AVERROR(EINVAL);
}
ctx->params->frameNumThreads = avctx->thread_count;
if (avctx->framerate.num > 0 && avctx->framerate.den > 0) {
ctx->params->fpsNum = avctx->framerate.num;
ctx->params->fpsDenom = avctx->framerate.den;
} else {
ctx->params->fpsNum = avctx->time_base.den;
ctx->params->fpsDenom = avctx->time_base.num * avctx->ticks_per_frame;
}
ctx->params->sourceWidth = avctx->width;
ctx->params->sourceHeight = avctx->height;
ctx->params->bEnablePsnr = !!(avctx->flags & AV_CODEC_FLAG_PSNR);
ctx->params->bOpenGOP = !(avctx->flags & AV_CODEC_FLAG_CLOSED_GOP);
/* Tune the CTU size based on input resolution. */
if (ctx->params->sourceWidth < 64 || ctx->params->sourceHeight < 64)
ctx->params->maxCUSize = 32;
if (ctx->params->sourceWidth < 32 || ctx->params->sourceHeight < 32)
ctx->params->maxCUSize = 16;
if (ctx->params->sourceWidth < 16 || ctx->params->sourceHeight < 16) {
av_log(avctx, AV_LOG_ERROR, "Image size is too small (%dx%d).\n",
ctx->params->sourceWidth, ctx->params->sourceHeight);
return AVERROR(EINVAL);
}
ctx->params->vui.bEnableVideoSignalTypePresentFlag = 1;
ctx->params->vui.bEnableVideoFullRangeFlag = avctx->pix_fmt == AV_PIX_FMT_YUVJ420P ||
avctx->pix_fmt == AV_PIX_FMT_YUVJ422P ||
avctx->pix_fmt == AV_PIX_FMT_YUVJ444P ||
avctx->color_range == AVCOL_RANGE_JPEG;
if ((avctx->color_primaries <= AVCOL_PRI_SMPTE432 &&
avctx->color_primaries != AVCOL_PRI_UNSPECIFIED) ||
(avctx->color_trc <= AVCOL_TRC_ARIB_STD_B67 &&
avctx->color_trc != AVCOL_TRC_UNSPECIFIED) ||
(avctx->colorspace <= AVCOL_SPC_ICTCP &&
avctx->colorspace != AVCOL_SPC_UNSPECIFIED)) {
ctx->params->vui.bEnableColorDescriptionPresentFlag = 1;
// x265 validates the parameters internally
ctx->params->vui.colorPrimaries = avctx->color_primaries;
ctx->params->vui.transferCharacteristics = avctx->color_trc;
ctx->params->vui.matrixCoeffs = avctx->colorspace;
}
if (avctx->sample_aspect_ratio.num > 0 && avctx->sample_aspect_ratio.den > 0) {
char sar[12];
int sar_num, sar_den;
av_reduce(&sar_num, &sar_den,
avctx->sample_aspect_ratio.num,
avctx->sample_aspect_ratio.den, 65535);
snprintf(sar, sizeof(sar), "%d:%d", sar_num, sar_den);
if (ctx->api->param_parse(ctx->params, "sar", sar) == X265_PARAM_BAD_VALUE) {
av_log(avctx, AV_LOG_ERROR, "Invalid SAR: %d:%d.\n", sar_num, sar_den);
return AVERROR_INVALIDDATA;
}
}
switch (avctx->pix_fmt) {
case AV_PIX_FMT_YUV420P:
case AV_PIX_FMT_YUV420P10:
case AV_PIX_FMT_YUV420P12:
ctx->params->internalCsp = X265_CSP_I420;
break;
case AV_PIX_FMT_YUV422P:
case AV_PIX_FMT_YUV422P10:
case AV_PIX_FMT_YUV422P12:
ctx->params->internalCsp = X265_CSP_I422;
break;
case AV_PIX_FMT_GBRP:
case AV_PIX_FMT_GBRP10:
case AV_PIX_FMT_GBRP12:
ctx->params->vui.matrixCoeffs = AVCOL_SPC_RGB;
ctx->params->vui.bEnableVideoSignalTypePresentFlag = 1;
ctx->params->vui.bEnableColorDescriptionPresentFlag = 1;
case AV_PIX_FMT_YUV444P:
case AV_PIX_FMT_YUV444P10:
case AV_PIX_FMT_YUV444P12:
ctx->params->internalCsp = X265_CSP_I444;
break;
case AV_PIX_FMT_GRAY8:
case AV_PIX_FMT_GRAY10:
case AV_PIX_FMT_GRAY12:
if (ctx->api->api_build_number < 85) {
av_log(avctx, AV_LOG_ERROR,
"libx265 version is %d, must be at least 85 for gray encoding.\n",
ctx->api->api_build_number);
return AVERROR_INVALIDDATA;
}
ctx->params->internalCsp = X265_CSP_I400;
break;
}
if (ctx->crf >= 0) {
char crf[6];
snprintf(crf, sizeof(crf), "%2.2f", ctx->crf);
if (ctx->api->param_parse(ctx->params, "crf", crf) == X265_PARAM_BAD_VALUE) {
av_log(avctx, AV_LOG_ERROR, "Invalid crf: %2.2f.\n", ctx->crf);
return AVERROR(EINVAL);
}
} else if (avctx->bit_rate > 0) {
ctx->params->rc.bitrate = avctx->bit_rate / 1000;
ctx->params->rc.rateControlMode = X265_RC_ABR;
}
ctx->params->rc.vbvBufferSize = avctx->rc_buffer_size / 1000;
ctx->params->rc.vbvMaxBitrate = avctx->rc_max_rate / 1000;
cpb_props = ff_add_cpb_side_data(avctx);
if (!cpb_props)
return AVERROR(ENOMEM);
cpb_props->buffer_size = ctx->params->rc.vbvBufferSize * 1000;
cpb_props->max_bitrate = ctx->params->rc.vbvMaxBitrate * 1000;
cpb_props->avg_bitrate = ctx->params->rc.bitrate * 1000;
if (!(avctx->flags & AV_CODEC_FLAG_GLOBAL_HEADER))
ctx->params->bRepeatHeaders = 1;
if (ctx->x265_opts) {
AVDictionary *dict = NULL;
AVDictionaryEntry *en = NULL;
if (!av_dict_parse_string(&dict, ctx->x265_opts, "=", ":", 0)) {
while ((en = av_dict_get(dict, "", en, AV_DICT_IGNORE_SUFFIX))) {
int parse_ret = ctx->api->param_parse(ctx->params, en->key, en->value);
switch (parse_ret) {
case X265_PARAM_BAD_NAME:
av_log(avctx, AV_LOG_WARNING,
"Unknown option: %s.\n", en->key);
break;
case X265_PARAM_BAD_VALUE:
av_log(avctx, AV_LOG_WARNING,
"Invalid value for %s: %s.\n", en->key, en->value);
break;
default:
break;
}
}
av_dict_free(&dict);
}
}
if (ctx->params->rc.vbvBufferSize && avctx->rc_initial_buffer_occupancy > 1000 &&
ctx->params->rc.vbvBufferInit == 0.9) {
ctx->params->rc.vbvBufferInit = (float)avctx->rc_initial_buffer_occupancy / 1000;
}
if (ctx->profile) {
if (ctx->api->param_apply_profile(ctx->params, ctx->profile) < 0) {
int i;
av_log(avctx, AV_LOG_ERROR, "Invalid or incompatible profile set: %s.\n", ctx->profile);
av_log(avctx, AV_LOG_INFO, "Possible profiles:");
for (i = 0; x265_profile_names[i]; i++)
av_log(avctx, AV_LOG_INFO, " %s", x265_profile_names[i]);
av_log(avctx, AV_LOG_INFO, "\n");
return AVERROR(EINVAL);
}
}
ctx->encoder = ctx->api->encoder_open(ctx->params);
if (!ctx->encoder) {
av_log(avctx, AV_LOG_ERROR, "Cannot open libx265 encoder.\n");
libx265_encode_close(avctx);
return AVERROR_INVALIDDATA;
}
if (avctx->flags & AV_CODEC_FLAG_GLOBAL_HEADER) {
x265_nal *nal;
int nnal;
avctx->extradata_size = ctx->api->encoder_headers(ctx->encoder, &nal, &nnal);
if (avctx->extradata_size <= 0) {
av_log(avctx, AV_LOG_ERROR, "Cannot encode headers.\n");
libx265_encode_close(avctx);
return AVERROR_INVALIDDATA;
}
avctx->extradata = av_malloc(avctx->extradata_size + AV_INPUT_BUFFER_PADDING_SIZE);
if (!avctx->extradata) {
av_log(avctx, AV_LOG_ERROR,
"Cannot allocate HEVC header of size %d.\n", avctx->extradata_size);
libx265_encode_close(avctx);
return AVERROR(ENOMEM);
}
memcpy(avctx->extradata, nal[0].payload, avctx->extradata_size);
}
return 0;
}
static av_cold int libx265_encode_set_roi(libx265Context *ctx, const AVFrame *frame, x265_picture* pic)
{
AVFrameSideData *sd = av_frame_get_side_data(frame, AV_FRAME_DATA_REGIONS_OF_INTEREST);
if (sd) {
if (ctx->params->rc.aqMode == X265_AQ_NONE) {
av_log(ctx, AV_LOG_WARNING, "Adaptive quantization must be enabled to use ROI encoding, skipping ROI.\n");
} else {
/* 8x8 block when qg-size is 8, 16*16 block otherwise. */
int mb_size = (ctx->params->rc.qgSize == 8) ? 8 : 16;
int mbx = (frame->width + mb_size - 1) / mb_size;
int mby = (frame->height + mb_size - 1) / mb_size;
int nb_rois;
AVRegionOfInterest *roi;
float *qoffsets; /* will be freed after encode is called. */
qoffsets = av_mallocz_array(mbx * mby, sizeof(*qoffsets));
if (!qoffsets)
return AVERROR(ENOMEM);
nb_rois = sd->size / sizeof(AVRegionOfInterest);
roi = (AVRegionOfInterest*)sd->data;
for (int count = 0; count < nb_rois; count++) {
int starty = FFMIN(mby, roi->top / mb_size);
int endy = FFMIN(mby, (roi->bottom + mb_size - 1)/ mb_size);
int startx = FFMIN(mbx, roi->left / mb_size);
int endx = FFMIN(mbx, (roi->right + mb_size - 1)/ mb_size);
float qoffset;
if (roi->self_size == 0) {
av_free(qoffsets);
av_log(ctx, AV_LOG_ERROR, "AVRegionOfInterest.self_size must be set to sizeof(AVRegionOfInterest).\n");
return AVERROR(EINVAL);
}
if (roi->qoffset.den == 0) {
av_free(qoffsets);
av_log(ctx, AV_LOG_ERROR, "AVRegionOfInterest.qoffset.den must not be zero.\n");
return AVERROR(EINVAL);
}
qoffset = roi->qoffset.num * 1.0f / roi->qoffset.den;
qoffset = av_clipf(qoffset, -1.0f, 1.0f);
/* qp range of x265 is from 0 to 51, just choose 25 as the scale value,
* so the range of final qoffset is [-25.0, 25.0].
*/
qoffset = qoffset * 25;
for (int y = starty; y < endy; y++)
for (int x = startx; x < endx; x++)
qoffsets[x + y*mbx] = qoffset;
roi = (AVRegionOfInterest*)((char*)roi + roi->self_size);
}
pic->quantOffsets = qoffsets;
}
}
return 0;
}
static int libx265_encode_frame(AVCodecContext *avctx, AVPacket *pkt,
const AVFrame *pic, int *got_packet)
{
libx265Context *ctx = avctx->priv_data;
x265_picture x265pic;
x265_picture x265pic_out = { 0 };
x265_nal *nal;
uint8_t *dst;
int payload = 0;
int nnal;
int ret;
int i;
ctx->api->picture_init(ctx->params, &x265pic);
if (pic) {
for (i = 0; i < 3; i++) {
x265pic.planes[i] = pic->data[i];
x265pic.stride[i] = pic->linesize[i];
}
x265pic.pts = pic->pts;
x265pic.bitDepth = av_pix_fmt_desc_get(avctx->pix_fmt)->comp[0].depth;
x265pic.sliceType = pic->pict_type == AV_PICTURE_TYPE_I ?
(ctx->forced_idr ? X265_TYPE_IDR : X265_TYPE_I) :
pic->pict_type == AV_PICTURE_TYPE_P ? X265_TYPE_P :
pic->pict_type == AV_PICTURE_TYPE_B ? X265_TYPE_B :
X265_TYPE_AUTO;
ret = libx265_encode_set_roi(ctx, pic, &x265pic);
if (ret < 0)
return ret;
}
ret = ctx->api->encoder_encode(ctx->encoder, &nal, &nnal,
pic ? &x265pic : NULL, &x265pic_out);
av_freep(&x265pic.quantOffsets);
if (ret < 0)
return AVERROR_EXTERNAL;
if (!nnal)
return 0;
for (i = 0; i < nnal; i++)
payload += nal[i].sizeBytes;
ret = ff_alloc_packet2(avctx, pkt, payload, payload);
if (ret < 0) {
av_log(avctx, AV_LOG_ERROR, "Error getting output packet.\n");
return ret;
}
dst = pkt->data;
for (i = 0; i < nnal; i++) {
memcpy(dst, nal[i].payload, nal[i].sizeBytes);
dst += nal[i].sizeBytes;
if (is_keyframe(nal[i].type))
pkt->flags |= AV_PKT_FLAG_KEY;
}
pkt->pts = x265pic_out.pts;
pkt->dts = x265pic_out.dts;
#if FF_API_CODED_FRAME
FF_DISABLE_DEPRECATION_WARNINGS
switch (x265pic_out.sliceType) {
case X265_TYPE_IDR:
case X265_TYPE_I:
avctx->coded_frame->pict_type = AV_PICTURE_TYPE_I;
break;
case X265_TYPE_P:
avctx->coded_frame->pict_type = AV_PICTURE_TYPE_P;
break;
case X265_TYPE_B:
avctx->coded_frame->pict_type = AV_PICTURE_TYPE_B;
break;
}
FF_ENABLE_DEPRECATION_WARNINGS
#endif
#if X265_BUILD >= 130
if (x265pic_out.sliceType == X265_TYPE_B)
#else
if (x265pic_out.frameData.sliceType == 'b')
#endif
pkt->flags |= AV_PKT_FLAG_DISPOSABLE;
*got_packet = 1;
return 0;
}
static const enum AVPixelFormat x265_csp_eight[] = {
AV_PIX_FMT_YUV420P,
AV_PIX_FMT_YUVJ420P,
AV_PIX_FMT_YUV422P,
AV_PIX_FMT_YUVJ422P,
AV_PIX_FMT_YUV444P,
AV_PIX_FMT_YUVJ444P,
AV_PIX_FMT_GBRP,
AV_PIX_FMT_GRAY8,
AV_PIX_FMT_NONE
};
static const enum AVPixelFormat x265_csp_ten[] = {
AV_PIX_FMT_YUV420P,
AV_PIX_FMT_YUVJ420P,
AV_PIX_FMT_YUV422P,
AV_PIX_FMT_YUVJ422P,
AV_PIX_FMT_YUV444P,
AV_PIX_FMT_YUVJ444P,
AV_PIX_FMT_GBRP,
AV_PIX_FMT_YUV420P10,
AV_PIX_FMT_YUV422P10,
AV_PIX_FMT_YUV444P10,
AV_PIX_FMT_GBRP10,
AV_PIX_FMT_GRAY8,
AV_PIX_FMT_GRAY10,
AV_PIX_FMT_NONE
};
static const enum AVPixelFormat x265_csp_twelve[] = {
AV_PIX_FMT_YUV420P,
AV_PIX_FMT_YUVJ420P,
AV_PIX_FMT_YUV422P,
AV_PIX_FMT_YUVJ422P,
AV_PIX_FMT_YUV444P,
AV_PIX_FMT_YUVJ444P,
AV_PIX_FMT_GBRP,
AV_PIX_FMT_YUV420P10,
AV_PIX_FMT_YUV422P10,
AV_PIX_FMT_YUV444P10,
AV_PIX_FMT_GBRP10,
AV_PIX_FMT_YUV420P12,
AV_PIX_FMT_YUV422P12,
AV_PIX_FMT_YUV444P12,
AV_PIX_FMT_GBRP12,
AV_PIX_FMT_GRAY8,
AV_PIX_FMT_GRAY10,
AV_PIX_FMT_GRAY12,
AV_PIX_FMT_NONE
};
static av_cold void libx265_encode_init_csp(AVCodec *codec)
{
if (x265_api_get(12))
codec->pix_fmts = x265_csp_twelve;
else if (x265_api_get(10))
codec->pix_fmts = x265_csp_ten;
else if (x265_api_get(8))
codec->pix_fmts = x265_csp_eight;
}
#define OFFSET(x) offsetof(libx265Context, x)
#define VE AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_ENCODING_PARAM
static const AVOption options[] = {
{ "crf", "set the x265 crf", OFFSET(crf), AV_OPT_TYPE_FLOAT, { .dbl = -1 }, -1, FLT_MAX, VE },
{ "forced-idr", "if forcing keyframes, force them as IDR frames", OFFSET(forced_idr),AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, VE },
{ "preset", "set the x265 preset", OFFSET(preset), AV_OPT_TYPE_STRING, { 0 }, 0, 0, VE },
{ "tune", "set the x265 tune parameter", OFFSET(tune), AV_OPT_TYPE_STRING, { 0 }, 0, 0, VE },
{ "profile", "set the x265 profile", OFFSET(profile), AV_OPT_TYPE_STRING, { 0 }, 0, 0, VE },
{ "x265-params", "set the x265 configuration using a :-separated list of key=value parameters", OFFSET(x265_opts), AV_OPT_TYPE_STRING, { 0 }, 0, 0, VE },
{ NULL }
};
static const AVClass class = {
.class_name = "libx265",
.item_name = av_default_item_name,
.option = options,
.version = LIBAVUTIL_VERSION_INT,
};
static const AVCodecDefault x265_defaults[] = {
{ "b", "0" },
{ NULL },
};
AVCodec ff_libx265_encoder = {
.name = "libx265",
.long_name = NULL_IF_CONFIG_SMALL("libx265 H.265 / HEVC"),
.type = AVMEDIA_TYPE_VIDEO,
.id = AV_CODEC_ID_HEVC,
.init = libx265_encode_init,
.init_static_data = libx265_encode_init_csp,
.encode2 = libx265_encode_frame,
.close = libx265_encode_close,
.priv_data_size = sizeof(libx265Context),
.priv_class = &class,
.defaults = x265_defaults,
.capabilities = AV_CODEC_CAP_DELAY | AV_CODEC_CAP_AUTO_THREADS,
.wrapper_name = "libx265",
};