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FFmpeg/libavcodec/libx265.c
wm4 b945fed629 avcodec: add metadata to identify wrappers and hardware decoders 
Explicitly identify decoder/encoder wrappers with a common name. This
saves API users from guessing by the name suffix. For example, they
don't have to guess that "h264_qsv" is the h264 QSV implementation, and
instead they can just check the AVCodec .codec and .wrapper_name fields.

Explicitly mark AVCodec entries that are hardware decoders or most
likely hardware decoders with new AV_CODEC_CAPs. The purpose is allowing
API users listing hardware decoders in a more generic way. The proposed
AVCodecHWConfig does not provide this information fully, because it's
concerned with decoder configuration, not information about the fact
whether the hardware is used or not.

AV_CODEC_CAP_HYBRID exists specifically for QSV, which can have software
implementations in case the hardware is not capable.

Based on a patch by Philip Langdale <philipl@overt.org>.

Merges Libav commit 47687a2f8a.
2017-12-14 19:37:56 +01:00

447 lines
14 KiB
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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;
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;
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);
if ((avctx->color_primaries <= AVCOL_PRI_BT2020 &&
avctx->color_primaries != AVCOL_PRI_UNSPECIFIED) ||
(avctx->color_trc <= AVCOL_TRC_BT2020_12 &&
avctx->color_trc != AVCOL_TRC_UNSPECIFIED) ||
(avctx->colorspace <= AVCOL_SPC_BT2020_CL &&
avctx->colorspace != AVCOL_SPC_UNSPECIFIED)) {
ctx->params->vui.bEnableVideoSignalTypePresentFlag = 1;
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;
}
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->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 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 = ctx->api->encoder_encode(ctx->encoder, &nal, &nnal,
pic ? &x265pic : NULL, &x265pic_out);
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_YUV422P,
AV_PIX_FMT_YUV444P,
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_YUV422P,
AV_PIX_FMT_YUV444P,
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_YUV422P,
AV_PIX_FMT_YUV444P,
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",
};
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