mirror of
https://git.ffmpeg.org/ffmpeg.git
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329 lines
9.6 KiB
C
329 lines
9.6 KiB
C
/*
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* libx265 encoder
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*
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* Copyright (c) 2013-2014 Derek Buitenhuis
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*
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* This file is part of Libav.
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*
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* Libav is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* Libav is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with Libav; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#include <x265.h>
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#include "libavutil/internal.h"
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#include "libavutil/common.h"
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#include "libavutil/opt.h"
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#include "libavutil/pixdesc.h"
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#include "avcodec.h"
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#include "internal.h"
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#if defined(_MSC_VER)
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#define X265_API_IMPORTS 1
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#endif
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typedef struct libx265Context {
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const AVClass *class;
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x265_encoder *encoder;
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x265_param *params;
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uint8_t *header;
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int header_size;
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char *preset;
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char *tune;
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char *x265_opts;
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} libx265Context;
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static int is_keyframe(NalUnitType naltype)
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{
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switch (naltype) {
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case NAL_UNIT_CODED_SLICE_BLA_W_LP:
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case NAL_UNIT_CODED_SLICE_BLA_W_RADL:
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case NAL_UNIT_CODED_SLICE_BLA_N_LP:
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case NAL_UNIT_CODED_SLICE_IDR_W_RADL:
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case NAL_UNIT_CODED_SLICE_IDR_N_LP:
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case NAL_UNIT_CODED_SLICE_CRA:
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return 1;
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default:
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return 0;
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}
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}
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static av_cold int libx265_encode_close(AVCodecContext *avctx)
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{
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libx265Context *ctx = avctx->priv_data;
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av_frame_free(&avctx->coded_frame);
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av_freep(&ctx->header);
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x265_param_free(ctx->params);
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if (ctx->encoder)
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x265_encoder_close(ctx->encoder);
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return 0;
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}
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static av_cold int libx265_encode_init(AVCodecContext *avctx)
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{
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libx265Context *ctx = avctx->priv_data;
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x265_nal *nal;
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uint8_t *buf;
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int sar_num, sar_den;
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int nnal;
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int ret;
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int i;
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if (avctx->strict_std_compliance > FF_COMPLIANCE_EXPERIMENTAL &&
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!av_pix_fmt_desc_get(avctx->pix_fmt)->log2_chroma_w &&
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!av_pix_fmt_desc_get(avctx->pix_fmt)->log2_chroma_h) {
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av_log(avctx, AV_LOG_ERROR,
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"4:4:4 support is not fully defined for HEVC yet. "
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"Set -strict experimental to encode anyway.\n");
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return AVERROR(ENOSYS);
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}
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avctx->coded_frame = av_frame_alloc();
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if (!avctx->coded_frame) {
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av_log(avctx, AV_LOG_ERROR, "Could not allocate frame.\n");
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return AVERROR(ENOMEM);
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}
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ctx->params = x265_param_alloc();
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if (!ctx->params) {
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av_log(avctx, AV_LOG_ERROR, "Could not allocate x265 param structure.\n");
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return AVERROR(ENOMEM);
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}
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if (x265_param_default_preset(ctx->params, ctx->preset, ctx->tune) < 0) {
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av_log(avctx, AV_LOG_ERROR, "Invalid preset or tune.\n");
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return AVERROR(EINVAL);
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}
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ctx->params->frameNumThreads = avctx->thread_count;
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ctx->params->fpsNum = avctx->time_base.den;
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ctx->params->fpsDenom = avctx->time_base.num * avctx->ticks_per_frame;
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ctx->params->sourceWidth = avctx->width;
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ctx->params->sourceHeight = avctx->height;
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av_reduce(&sar_num, &sar_den,
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avctx->sample_aspect_ratio.num,
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avctx->sample_aspect_ratio.den, 4096);
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ctx->params->bEnableVuiParametersPresentFlag = 1;
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ctx->params->bEnableAspectRatioIdc = 1;
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ctx->params->aspectRatioIdc = 255;
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ctx->params->sarWidth = sar_num;
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ctx->params->sarHeight = sar_den;
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if (x265_max_bit_depth == 8)
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ctx->params->internalBitDepth = 8;
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else if (x265_max_bit_depth == 12)
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ctx->params->internalBitDepth = 10;
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switch (avctx->pix_fmt) {
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case AV_PIX_FMT_YUV420P:
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case AV_PIX_FMT_YUV420P10:
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ctx->params->internalCsp = X265_CSP_I420;
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break;
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case AV_PIX_FMT_YUV444P:
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case AV_PIX_FMT_YUV444P10:
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ctx->params->internalCsp = X265_CSP_I444;
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break;
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}
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if (avctx->bit_rate > 0) {
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ctx->params->rc.bitrate = avctx->bit_rate / 1000;
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ctx->params->rc.rateControlMode = X265_RC_ABR;
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}
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if (ctx->x265_opts) {
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AVDictionary *dict = NULL;
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AVDictionaryEntry *en = NULL;
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if (!av_dict_parse_string(&dict, ctx->x265_opts, "=", ":", 0)) {
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while ((en = av_dict_get(dict, "", en, AV_DICT_IGNORE_SUFFIX))) {
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int parse_ret = x265_param_parse(ctx->params, en->key, en->value);
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switch (parse_ret) {
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case X265_PARAM_BAD_NAME:
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av_log(avctx, AV_LOG_WARNING,
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"Unknown option: %s.\n", en->key);
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break;
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case X265_PARAM_BAD_VALUE:
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av_log(avctx, AV_LOG_WARNING,
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"Invalid value for %s: %s.\n", en->key, en->value);
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break;
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default:
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break;
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}
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}
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av_dict_free(&dict);
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}
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}
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ctx->encoder = x265_encoder_open(ctx->params);
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if (!ctx->encoder) {
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av_log(avctx, AV_LOG_ERROR, "Cannot open libx265 encoder.\n");
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libx265_encode_close(avctx);
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return AVERROR_INVALIDDATA;
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}
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ret = x265_encoder_headers(ctx->encoder, &nal, &nnal);
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if (ret < 0) {
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av_log(avctx, AV_LOG_ERROR, "Cannot encode headers.\n");
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libx265_encode_close(avctx);
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return AVERROR_INVALIDDATA;
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}
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for (i = 0; i < nnal; i++)
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ctx->header_size += nal[i].sizeBytes;
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ctx->header = av_malloc(ctx->header_size);
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if (!ctx->header) {
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av_log(avctx, AV_LOG_ERROR,
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"Cannot allocate HEVC header of size %d.\n", ctx->header_size);
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libx265_encode_close(avctx);
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return AVERROR(ENOMEM);
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}
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buf = ctx->header;
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for (i = 0; i < nnal; i++) {
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memcpy(buf, nal[i].payload, nal[i].sizeBytes);
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buf += nal[i].sizeBytes;
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}
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return 0;
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}
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static int libx265_encode_frame(AVCodecContext *avctx, AVPacket *pkt,
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const AVFrame *pic, int *got_packet)
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{
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libx265Context *ctx = avctx->priv_data;
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x265_picture x265pic;
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x265_picture x265pic_out = { { 0 } };
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x265_nal *nal;
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uint8_t *dst;
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int payload = 0;
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int nnal;
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int ret;
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int i;
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x265_picture_init(ctx->params, &x265pic);
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if (pic) {
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for (i = 0; i < 3; i++) {
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x265pic.planes[i] = pic->data[i];
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x265pic.stride[i] = pic->linesize[i];
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}
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x265pic.pts = pic->pts;
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x265pic.bitDepth = av_pix_fmt_desc_get(avctx->pix_fmt)->comp[0].depth_minus1 + 1;
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}
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ret = x265_encoder_encode(ctx->encoder, &nal, &nnal,
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pic ? &x265pic : NULL, &x265pic_out);
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if (ret < 0)
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return AVERROR_UNKNOWN;
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if (!nnal)
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return 0;
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for (i = 0; i < nnal; i++)
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payload += nal[i].sizeBytes;
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payload += ctx->header_size;
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ret = ff_alloc_packet(pkt, payload);
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if (ret < 0) {
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av_log(avctx, AV_LOG_ERROR, "Error getting output packet.\n");
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return ret;
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}
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dst = pkt->data;
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if (ctx->header) {
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memcpy(dst, ctx->header, ctx->header_size);
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dst += ctx->header_size;
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av_freep(&ctx->header);
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ctx->header_size = 0;
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}
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for (i = 0; i < nnal; i++) {
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memcpy(dst, nal[i].payload, nal[i].sizeBytes);
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dst += nal[i].sizeBytes;
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if (is_keyframe(nal[i].type))
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pkt->flags |= AV_PKT_FLAG_KEY;
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}
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pkt->pts = x265pic_out.pts;
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pkt->dts = x265pic_out.dts;
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*got_packet = 1;
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return 0;
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}
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static const enum AVPixelFormat x265_csp_eight[] = {
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AV_PIX_FMT_YUV420P,
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AV_PIX_FMT_YUV444P,
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AV_PIX_FMT_NONE
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};
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static const enum AVPixelFormat x265_csp_twelve[] = {
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AV_PIX_FMT_YUV420P,
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AV_PIX_FMT_YUV444P,
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AV_PIX_FMT_YUV420P10,
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AV_PIX_FMT_YUV444P10,
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AV_PIX_FMT_NONE
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};
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static av_cold void libx265_encode_init_csp(AVCodec *codec)
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{
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if (x265_max_bit_depth == 8)
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codec->pix_fmts = x265_csp_eight;
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else if (x265_max_bit_depth == 12)
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codec->pix_fmts = x265_csp_twelve;
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}
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#define OFFSET(x) offsetof(libx265Context, x)
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#define VE AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_ENCODING_PARAM
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static const AVOption options[] = {
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{ "preset", "set the x265 preset", OFFSET(preset), AV_OPT_TYPE_STRING, { 0 }, 0, 0, VE },
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{ "tune", "set the x265 tune parameter", OFFSET(tune), AV_OPT_TYPE_STRING, { 0 }, 0, 0, VE },
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{ "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 },
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{ NULL }
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};
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static const AVClass class = {
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.class_name = "libx265",
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.item_name = av_default_item_name,
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.option = options,
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.version = LIBAVUTIL_VERSION_INT,
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};
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AVCodec ff_libx265_encoder = {
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.name = "libx265",
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.long_name = NULL_IF_CONFIG_SMALL("libx265 H.265 / HEVC"),
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.type = AVMEDIA_TYPE_VIDEO,
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.id = AV_CODEC_ID_HEVC,
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.init = libx265_encode_init,
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.init_static_data = libx265_encode_init_csp,
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.encode2 = libx265_encode_frame,
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.close = libx265_encode_close,
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.priv_data_size = sizeof(libx265Context),
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.priv_class = &class,
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.capabilities = CODEC_CAP_DELAY | CODEC_CAP_AUTO_THREADS,
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};
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