mirror of https://github.com/FFmpeg/FFmpeg.git
Derek Buitenhuis
11 years ago
parent
f5d92d9cab
commit
50ea93158d
8 changed files with 313 additions and 4 deletions
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/*
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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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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 nnal; |
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int ret; |
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int i; |
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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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x265_param_default(ctx->params); |
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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->frameRate = (int) (avctx->time_base.den / avctx->time_base.num); |
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ctx->params->sourceWidth = avctx->width; |
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ctx->params->sourceHeight = avctx->height; |
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ctx->params->inputBitDepth = av_pix_fmt_desc_get(avctx->pix_fmt)->comp[0].depth_minus1 + 1; |
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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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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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} |
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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_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_YUV420P10, |
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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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