forked from KolibriOS/kolibrios
235 lines
8.8 KiB
C
235 lines
8.8 KiB
C
/*
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* OpenH264 video encoder
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* Copyright (C) 2014 Martin Storsjo
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*
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* This file is part of FFmpeg.
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*
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* FFmpeg 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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* FFmpeg 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 FFmpeg; 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 <wels/codec_api.h>
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#include <wels/codec_ver.h>
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#include "libavutil/attributes.h"
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#include "libavutil/common.h"
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#include "libavutil/opt.h"
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#include "libavutil/intreadwrite.h"
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#include "libavutil/mathematics.h"
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#include "avcodec.h"
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#include "internal.h"
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typedef struct SVCContext {
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const AVClass *av_class;
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ISVCEncoder *encoder;
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int slice_mode;
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int loopfilter;
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char *profile;
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} SVCContext;
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#define OPENH264_VER_AT_LEAST(maj, min) \
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((OPENH264_MAJOR > (maj)) || \
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(OPENH264_MAJOR == (maj) && OPENH264_MINOR >= (min)))
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#define OFFSET(x) offsetof(SVCContext, 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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{ "slice_mode", "Slice mode", OFFSET(slice_mode), AV_OPT_TYPE_INT, { .i64 = SM_AUTO_SLICE }, SM_SINGLE_SLICE, SM_RESERVED, VE, "slice_mode" },
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{ "fixed", "A fixed number of slices", 0, AV_OPT_TYPE_CONST, { .i64 = SM_FIXEDSLCNUM_SLICE }, 0, 0, VE, "slice_mode" },
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{ "rowmb", "One slice per row of macroblocks", 0, AV_OPT_TYPE_CONST, { .i64 = SM_ROWMB_SLICE }, 0, 0, VE, "slice_mode" },
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{ "auto", "Automatic number of slices according to number of threads", 0, AV_OPT_TYPE_CONST, { .i64 = SM_AUTO_SLICE }, 0, 0, VE, "slice_mode" },
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{ "loopfilter", "Enable loop filter", OFFSET(loopfilter), AV_OPT_TYPE_INT, { .i64 = 1 }, 0, 1, VE },
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{ "profile", "Set profile restrictions", OFFSET(profile), 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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"libopenh264enc", av_default_item_name, options, LIBAVUTIL_VERSION_INT
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};
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static av_cold int svc_encode_close(AVCodecContext *avctx)
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{
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SVCContext *s = avctx->priv_data;
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if (s->encoder)
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WelsDestroySVCEncoder(s->encoder);
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return 0;
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}
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static av_cold int svc_encode_init(AVCodecContext *avctx)
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{
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SVCContext *s = avctx->priv_data;
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SEncParamExt param = { 0 };
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int err = AVERROR_UNKNOWN;
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// Mingw GCC < 4.7 on x86_32 uses an incorrect/buggy ABI for the WelsGetCodecVersion
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// function (for functions returning larger structs), thus skip the check in those
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// configurations.
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#if !defined(_WIN32) || !defined(__GNUC__) || !ARCH_X86_32 || AV_GCC_VERSION_AT_LEAST(4, 7)
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OpenH264Version libver = WelsGetCodecVersion();
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if (memcmp(&libver, &g_stCodecVersion, sizeof(libver))) {
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av_log(avctx, AV_LOG_ERROR, "Incorrect library version loaded\n");
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return AVERROR(EINVAL);
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}
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#endif
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if (WelsCreateSVCEncoder(&s->encoder)) {
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av_log(avctx, AV_LOG_ERROR, "Unable to create encoder\n");
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return AVERROR_UNKNOWN;
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}
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(*s->encoder)->GetDefaultParams(s->encoder, ¶m);
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param.fMaxFrameRate = 1/av_q2d(avctx->time_base);
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param.iPicWidth = avctx->width;
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param.iPicHeight = avctx->height;
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param.iTargetBitrate = avctx->bit_rate;
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param.iMaxBitrate = FFMAX(avctx->rc_max_rate, avctx->bit_rate);
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param.iRCMode = RC_QUALITY_MODE;
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param.iTemporalLayerNum = 1;
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param.iSpatialLayerNum = 1;
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param.bEnableDenoise = 0;
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param.bEnableBackgroundDetection = 1;
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param.bEnableAdaptiveQuant = 1;
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param.bEnableFrameSkip = 0;
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param.bEnableLongTermReference = 0;
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param.iLtrMarkPeriod = 30;
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param.uiIntraPeriod = avctx->gop_size;
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#if OPENH264_VER_AT_LEAST(1, 4)
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param.eSpsPpsIdStrategy = CONSTANT_ID;
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#else
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param.bEnableSpsPpsIdAddition = 0;
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#endif
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param.bPrefixNalAddingCtrl = 0;
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param.iLoopFilterDisableIdc = !s->loopfilter;
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param.iEntropyCodingModeFlag = 0;
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param.iMultipleThreadIdc = avctx->thread_count;
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if (s->profile && !strcmp(s->profile, "main"))
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param.iEntropyCodingModeFlag = 1;
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else if (!s->profile && avctx->coder_type == FF_CODER_TYPE_AC)
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param.iEntropyCodingModeFlag = 1;
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param.sSpatialLayers[0].iVideoWidth = param.iPicWidth;
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param.sSpatialLayers[0].iVideoHeight = param.iPicHeight;
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param.sSpatialLayers[0].fFrameRate = param.fMaxFrameRate;
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param.sSpatialLayers[0].iSpatialBitrate = param.iTargetBitrate;
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param.sSpatialLayers[0].iMaxSpatialBitrate = param.iMaxBitrate;
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if (avctx->slices > 1)
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s->slice_mode = SM_FIXEDSLCNUM_SLICE;
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param.sSpatialLayers[0].sSliceCfg.uiSliceMode = s->slice_mode;
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param.sSpatialLayers[0].sSliceCfg.sSliceArgument.uiSliceNum = avctx->slices;
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if ((*s->encoder)->InitializeExt(s->encoder, ¶m) != cmResultSuccess) {
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av_log(avctx, AV_LOG_ERROR, "Initialize failed\n");
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goto fail;
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}
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if (avctx->flags & AV_CODEC_FLAG_GLOBAL_HEADER) {
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SFrameBSInfo fbi = { 0 };
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int i, size = 0;
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(*s->encoder)->EncodeParameterSets(s->encoder, &fbi);
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for (i = 0; i < fbi.sLayerInfo[0].iNalCount; i++)
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size += fbi.sLayerInfo[0].pNalLengthInByte[i];
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avctx->extradata = av_mallocz(size + AV_INPUT_BUFFER_PADDING_SIZE);
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if (!avctx->extradata) {
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err = AVERROR(ENOMEM);
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goto fail;
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}
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avctx->extradata_size = size;
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memcpy(avctx->extradata, fbi.sLayerInfo[0].pBsBuf, size);
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}
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return 0;
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fail:
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svc_encode_close(avctx);
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return err;
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}
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static int svc_encode_frame(AVCodecContext *avctx, AVPacket *avpkt,
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const AVFrame *frame, int *got_packet)
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{
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SVCContext *s = avctx->priv_data;
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SFrameBSInfo fbi = { 0 };
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int i, ret;
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int encoded;
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SSourcePicture sp = { 0 };
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int size = 0, layer, first_layer = 0;
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int layer_size[MAX_LAYER_NUM_OF_FRAME] = { 0 };
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sp.iColorFormat = videoFormatI420;
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for (i = 0; i < 3; i++) {
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sp.iStride[i] = frame->linesize[i];
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sp.pData[i] = frame->data[i];
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}
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sp.iPicWidth = avctx->width;
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sp.iPicHeight = avctx->height;
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encoded = (*s->encoder)->EncodeFrame(s->encoder, &sp, &fbi);
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if (encoded != cmResultSuccess) {
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av_log(avctx, AV_LOG_ERROR, "EncodeFrame failed\n");
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return AVERROR_UNKNOWN;
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}
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if (fbi.eFrameType == videoFrameTypeSkip) {
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av_log(avctx, AV_LOG_DEBUG, "frame skipped\n");
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return 0;
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}
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first_layer = 0;
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// Normal frames are returned with one single layer, while IDR
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// frames have two layers, where the first layer contains the SPS/PPS.
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// If using global headers, don't include the SPS/PPS in the returned
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// packet - thus, only return one layer.
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if (avctx->flags & AV_CODEC_FLAG_GLOBAL_HEADER)
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first_layer = fbi.iLayerNum - 1;
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for (layer = first_layer; layer < fbi.iLayerNum; layer++) {
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for (i = 0; i < fbi.sLayerInfo[layer].iNalCount; i++)
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layer_size[layer] += fbi.sLayerInfo[layer].pNalLengthInByte[i];
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size += layer_size[layer];
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}
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av_log(avctx, AV_LOG_DEBUG, "%d slices\n", fbi.sLayerInfo[fbi.iLayerNum - 1].iNalCount);
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if ((ret = ff_alloc_packet2(avctx, avpkt, size, size))) {
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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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size = 0;
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for (layer = first_layer; layer < fbi.iLayerNum; layer++) {
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memcpy(avpkt->data + size, fbi.sLayerInfo[layer].pBsBuf, layer_size[layer]);
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size += layer_size[layer];
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}
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avpkt->pts = frame->pts;
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if (fbi.eFrameType == videoFrameTypeIDR)
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avpkt->flags |= AV_PKT_FLAG_KEY;
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*got_packet = 1;
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return 0;
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}
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AVCodec ff_libopenh264_encoder = {
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.name = "libopenh264",
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.long_name = NULL_IF_CONFIG_SMALL("OpenH264 H.264 / AVC / MPEG-4 AVC / MPEG-4 part 10"),
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.type = AVMEDIA_TYPE_VIDEO,
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.id = AV_CODEC_ID_H264,
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.priv_data_size = sizeof(SVCContext),
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.init = svc_encode_init,
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.encode2 = svc_encode_frame,
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.close = svc_encode_close,
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.capabilities = AV_CODEC_CAP_AUTO_THREADS,
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.pix_fmts = (const enum AVPixelFormat[]){ AV_PIX_FMT_YUV420P,
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AV_PIX_FMT_NONE },
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.priv_class = &class,
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};
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