/* * OpenH264 video encoder * Copyright (C) 2014 Martin Storsjo * * 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 */ #include <wels/codec_api.h> #include <wels/codec_ver.h> #include "libavutil/attributes.h" #include "libavutil/common.h" #include "libavutil/opt.h" #include "libavutil/intreadwrite.h" #include "libavutil/mathematics.h" #include "avcodec.h" #include "internal.h" typedef struct SVCContext { const AVClass *av_class; ISVCEncoder *encoder; int slice_mode; int loopfilter; char *profile; } SVCContext; #define OPENH264_VER_AT_LEAST(maj, min) \ ((OPENH264_MAJOR > (maj)) || \ (OPENH264_MAJOR == (maj) && OPENH264_MINOR >= (min))) #define OFFSET(x) offsetof(SVCContext, x) #define VE AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_ENCODING_PARAM static const AVOption options[] = { { "slice_mode", "Slice mode", OFFSET(slice_mode), AV_OPT_TYPE_INT, { .i64 = SM_AUTO_SLICE }, SM_SINGLE_SLICE, SM_RESERVED, VE, "slice_mode" }, { "fixed", "A fixed number of slices", 0, AV_OPT_TYPE_CONST, { .i64 = SM_FIXEDSLCNUM_SLICE }, 0, 0, VE, "slice_mode" }, { "rowmb", "One slice per row of macroblocks", 0, AV_OPT_TYPE_CONST, { .i64 = SM_ROWMB_SLICE }, 0, 0, VE, "slice_mode" }, { "auto", "Automatic number of slices according to number of threads", 0, AV_OPT_TYPE_CONST, { .i64 = SM_AUTO_SLICE }, 0, 0, VE, "slice_mode" }, { "loopfilter", "Enable loop filter", OFFSET(loopfilter), AV_OPT_TYPE_INT, { .i64 = 1 }, 0, 1, VE }, { "profile", "Set profile restrictions", OFFSET(profile), AV_OPT_TYPE_STRING, { 0 }, 0, 0, VE }, { NULL } }; static const AVClass class = { "libopenh264enc", av_default_item_name, options, LIBAVUTIL_VERSION_INT }; static av_cold int svc_encode_close(AVCodecContext *avctx) { SVCContext *s = avctx->priv_data; if (s->encoder) WelsDestroySVCEncoder(s->encoder); return 0; } static av_cold int svc_encode_init(AVCodecContext *avctx) { SVCContext *s = avctx->priv_data; SEncParamExt param = { 0 }; int err = AVERROR_UNKNOWN; // Mingw GCC < 4.7 on x86_32 uses an incorrect/buggy ABI for the WelsGetCodecVersion // function (for functions returning larger structs), thus skip the check in those // configurations. #if !defined(_WIN32) || !defined(__GNUC__) || !ARCH_X86_32 || AV_GCC_VERSION_AT_LEAST(4, 7) OpenH264Version libver = WelsGetCodecVersion(); if (memcmp(&libver, &g_stCodecVersion, sizeof(libver))) { av_log(avctx, AV_LOG_ERROR, "Incorrect library version loaded\n"); return AVERROR(EINVAL); } #endif if (WelsCreateSVCEncoder(&s->encoder)) { av_log(avctx, AV_LOG_ERROR, "Unable to create encoder\n"); return AVERROR_UNKNOWN; } (*s->encoder)->GetDefaultParams(s->encoder, ¶m); param.fMaxFrameRate = avctx->time_base.den / avctx->time_base.num; param.iPicWidth = avctx->width; param.iPicHeight = avctx->height; param.iTargetBitrate = avctx->bit_rate; param.iMaxBitrate = FFMAX(avctx->rc_max_rate, avctx->bit_rate); param.iRCMode = RC_QUALITY_MODE; param.iTemporalLayerNum = 1; param.iSpatialLayerNum = 1; param.bEnableDenoise = 0; param.bEnableBackgroundDetection = 1; param.bEnableAdaptiveQuant = 1; param.bEnableFrameSkip = 0; param.bEnableLongTermReference = 0; param.iLtrMarkPeriod = 30; param.uiIntraPeriod = avctx->gop_size; #if OPENH264_VER_AT_LEAST(1, 4) param.eSpsPpsIdStrategy = CONSTANT_ID; #else param.bEnableSpsPpsIdAddition = 0; #endif param.bPrefixNalAddingCtrl = 0; param.iLoopFilterDisableIdc = !s->loopfilter; param.iEntropyCodingModeFlag = 0; param.iMultipleThreadIdc = avctx->thread_count; if (s->profile && !strcmp(s->profile, "main")) param.iEntropyCodingModeFlag = 1; else if (!s->profile && avctx->coder_type == FF_CODER_TYPE_AC) param.iEntropyCodingModeFlag = 1; param.sSpatialLayers[0].iVideoWidth = param.iPicWidth; param.sSpatialLayers[0].iVideoHeight = param.iPicHeight; param.sSpatialLayers[0].fFrameRate = param.fMaxFrameRate; param.sSpatialLayers[0].iSpatialBitrate = param.iTargetBitrate; param.sSpatialLayers[0].iMaxSpatialBitrate = param.iMaxBitrate; if (avctx->slices > 1) s->slice_mode = SM_FIXEDSLCNUM_SLICE; param.sSpatialLayers[0].sSliceCfg.uiSliceMode = s->slice_mode; param.sSpatialLayers[0].sSliceCfg.sSliceArgument.uiSliceNum = avctx->slices; if ((*s->encoder)->InitializeExt(s->encoder, ¶m) != cmResultSuccess) { av_log(avctx, AV_LOG_ERROR, "Initialize failed\n"); goto fail; } if (avctx->flags & CODEC_FLAG_GLOBAL_HEADER) { SFrameBSInfo fbi = { 0 }; int i, size = 0; (*s->encoder)->EncodeParameterSets(s->encoder, &fbi); for (i = 0; i < fbi.sLayerInfo[0].iNalCount; i++) size += fbi.sLayerInfo[0].pNalLengthInByte[i]; avctx->extradata = av_mallocz(size + FF_INPUT_BUFFER_PADDING_SIZE); if (!avctx->extradata) { err = AVERROR(ENOMEM); goto fail; } avctx->extradata_size = size; memcpy(avctx->extradata, fbi.sLayerInfo[0].pBsBuf, size); } return 0; fail: svc_encode_close(avctx); return err; } static int svc_encode_frame(AVCodecContext *avctx, AVPacket *avpkt, const AVFrame *frame, int *got_packet) { SVCContext *s = avctx->priv_data; SFrameBSInfo fbi = { 0 }; int i, ret; int encoded; SSourcePicture sp = { 0 }; int size = 0, layer, first_layer = 0; int layer_size[MAX_LAYER_NUM_OF_FRAME] = { 0 }; sp.iColorFormat = videoFormatI420; for (i = 0; i < 3; i++) { sp.iStride[i] = frame->linesize[i]; sp.pData[i] = frame->data[i]; } sp.iPicWidth = avctx->width; sp.iPicHeight = avctx->height; encoded = (*s->encoder)->EncodeFrame(s->encoder, &sp, &fbi); if (encoded != cmResultSuccess) { av_log(avctx, AV_LOG_ERROR, "EncodeFrame failed\n"); return AVERROR_UNKNOWN; } if (fbi.eFrameType == videoFrameTypeSkip) { av_log(avctx, AV_LOG_DEBUG, "frame skipped\n"); return 0; } first_layer = 0; // Normal frames are returned with one single layer, while IDR // frames have two layers, where the first layer contains the SPS/PPS. // If using global headers, don't include the SPS/PPS in the returned // packet - thus, only return one layer. if (avctx->flags & CODEC_FLAG_GLOBAL_HEADER) first_layer = fbi.iLayerNum - 1; for (layer = first_layer; layer < fbi.iLayerNum; layer++) { for (i = 0; i < fbi.sLayerInfo[layer].iNalCount; i++) layer_size[layer] += fbi.sLayerInfo[layer].pNalLengthInByte[i]; size += layer_size[layer]; } av_log(avctx, AV_LOG_DEBUG, "%d slices\n", fbi.sLayerInfo[fbi.iLayerNum - 1].iNalCount); if ((ret = ff_alloc_packet(avpkt, size))) { av_log(avctx, AV_LOG_ERROR, "Error getting output packet\n"); return ret; } size = 0; for (layer = first_layer; layer < fbi.iLayerNum; layer++) { memcpy(avpkt->data + size, fbi.sLayerInfo[layer].pBsBuf, layer_size[layer]); size += layer_size[layer]; } avpkt->pts = frame->pts; if (fbi.eFrameType == videoFrameTypeIDR) avpkt->flags |= AV_PKT_FLAG_KEY; *got_packet = 1; return 0; } AVCodec ff_libopenh264_encoder = { .name = "libopenh264", .long_name = NULL_IF_CONFIG_SMALL("OpenH264 H.264 / AVC / MPEG-4 AVC / MPEG-4 part 10"), .type = AVMEDIA_TYPE_VIDEO, .id = AV_CODEC_ID_H264, .priv_data_size = sizeof(SVCContext), .init = svc_encode_init, .encode2 = svc_encode_frame, .close = svc_encode_close, .capabilities = CODEC_CAP_AUTO_THREADS, .pix_fmts = (const enum AVPixelFormat[]){ AV_PIX_FMT_YUV420P, AV_PIX_FMT_NONE }, .priv_class = &class, };