From 50ea93158d4c480f64069e8bd1da388486dcf4ba Mon Sep 17 00:00:00 2001 From: Derek Buitenhuis Date: Wed, 2 Oct 2013 14:46:26 +0000 Subject: Add libx265 encoder Signed-off-by: Derek Buitenhuis --- libavcodec/libx265.c | 284 +++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 284 insertions(+) create mode 100644 libavcodec/libx265.c (limited to 'libavcodec/libx265.c') diff --git a/libavcodec/libx265.c b/libavcodec/libx265.c new file mode 100644 index 0000000000..e63e0cb75d --- /dev/null +++ b/libavcodec/libx265.c @@ -0,0 +1,284 @@ +/* + * libx265 encoder + * + * Copyright (c) 2013-2014 Derek Buitenhuis + * + * This file is part of Libav. + * + * Libav 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. + * + * Libav 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 Libav; if not, write to the Free Software + * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA + */ + +#include + +#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; + uint8_t *header; + int header_size; + + char *preset; + char *tune; + 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; + + av_frame_free(&avctx->coded_frame); + av_freep(&ctx->header); + + x265_param_free(ctx->params); + + if (ctx->encoder) + x265_encoder_close(ctx->encoder); + + return 0; +} + +static av_cold int libx265_encode_init(AVCodecContext *avctx) +{ + libx265Context *ctx = avctx->priv_data; + x265_nal *nal; + uint8_t *buf; + int nnal; + int ret; + int i; + + avctx->coded_frame = av_frame_alloc(); + if (!avctx->coded_frame) { + av_log(avctx, AV_LOG_ERROR, "Could not allocate frame.\n"); + return AVERROR(ENOMEM); + } + + ctx->params = x265_param_alloc(); + if (!ctx->params) { + av_log(avctx, AV_LOG_ERROR, "Could not allocate x265 param structure.\n"); + return AVERROR(ENOMEM); + } + + x265_param_default(ctx->params); + if (x265_param_default_preset(ctx->params, ctx->preset, ctx->tune) < 0) { + av_log(avctx, AV_LOG_ERROR, "Invalid preset or tune.\n"); + return AVERROR(EINVAL); + } + + ctx->params->frameNumThreads = avctx->thread_count; + ctx->params->frameRate = (int) (avctx->time_base.den / avctx->time_base.num); + ctx->params->sourceWidth = avctx->width; + ctx->params->sourceHeight = avctx->height; + ctx->params->inputBitDepth = av_pix_fmt_desc_get(avctx->pix_fmt)->comp[0].depth_minus1 + 1; + + if (avctx->bit_rate > 0) { + ctx->params->rc.bitrate = avctx->bit_rate / 1000; + ctx->params->rc.rateControlMode = X265_RC_ABR; + } + + 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 = x265_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); + } + } + + ctx->encoder = x265_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; + } + + ret = x265_encoder_headers(ctx->encoder, &nal, &nnal); + if (ret < 0) { + av_log(avctx, AV_LOG_ERROR, "Cannot encode headers.\n"); + libx265_encode_close(avctx); + return AVERROR_INVALIDDATA; + } + + for (i = 0; i < nnal; i++) + ctx->header_size += nal[i].sizeBytes; + + ctx->header = av_malloc(ctx->header_size); + if (!ctx->header) { + av_log(avctx, AV_LOG_ERROR, + "Cannot allocate HEVC header of size %d.\n", ctx->header_size); + libx265_encode_close(avctx); + return AVERROR(ENOMEM); + } + + buf = ctx->header; + for (i = 0; i < nnal; i++) { + memcpy(buf, nal[i].payload, nal[i].sizeBytes); + buf += nal[i].sizeBytes; + } + + 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; + + if (pic) { + for (i = 0; i < 3; i++) { + x265pic.planes[i] = pic->data[i]; + x265pic.stride[i] = pic->linesize[i]; + } + + x265pic.pts = pic->pts; + } + + ret = x265_encoder_encode(ctx->encoder, &nal, &nnal, + pic ? &x265pic : NULL, &x265pic_out); + if (ret < 0) + return AVERROR_UNKNOWN; + + if (!nnal) + return 0; + + for (i = 0; i < nnal; i++) + payload += nal[i].sizeBytes; + + payload += ctx->header_size; + + ret = ff_alloc_packet(pkt, payload); + if (ret < 0) { + av_log(avctx, AV_LOG_ERROR, "Error getting output packet.\n"); + return ret; + } + dst = pkt->data; + + if (ctx->header) { + memcpy(dst, ctx->header, ctx->header_size); + dst += ctx->header_size; + + av_freep(&ctx->header); + ctx->header_size = 0; + } + + 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; + + *got_packet = 1; + return 0; +} + +static const enum AVPixelFormat x265_csp_eight[] = { + AV_PIX_FMT_YUV420P, + AV_PIX_FMT_NONE +}; + +static const enum AVPixelFormat x265_csp_twelve[] = { + AV_PIX_FMT_YUV420P, + AV_PIX_FMT_YUV420P10, + AV_PIX_FMT_NONE +}; + +static av_cold void libx265_encode_init_csp(AVCodec *codec) +{ + if (x265_max_bit_depth == 8) + codec->pix_fmts = x265_csp_eight; + else if (x265_max_bit_depth == 12) + codec->pix_fmts = x265_csp_twelve; +} + +#define OFFSET(x) offsetof(libx265Context, x) +#define VE AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_ENCODING_PARAM +static const AVOption options[] = { + { "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 }, + { "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, +}; + +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, + .capabilities = CODEC_CAP_DELAY | CODEC_CAP_AUTO_THREADS, +}; -- cgit v1.2.3