| /* |
| * 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/internal.h" |
| #include "libavutil/intreadwrite.h" |
| #include "libavutil/mathematics.h" |
| |
| #include "avcodec.h" |
| #include "internal.h" |
| #include "libopenh264.h" |
| |
| #if !OPENH264_VER_AT_LEAST(1, 6) |
| #define SM_SIZELIMITED_SLICE SM_DYN_SLICE |
| #endif |
| |
| typedef struct SVCContext { |
| const AVClass *av_class; |
| ISVCEncoder *encoder; |
| int slice_mode; |
| int loopfilter; |
| char *profile; |
| int max_nal_size; |
| int skip_frames; |
| int skipped; |
| int cabac; |
| } SVCContext; |
| |
| #define OFFSET(x) offsetof(SVCContext, x) |
| #define VE AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_ENCODING_PARAM |
| static const AVOption options[] = { |
| #if OPENH264_VER_AT_LEAST(1, 6) |
| { "slice_mode", "set slice mode", OFFSET(slice_mode), AV_OPT_TYPE_INT, { .i64 = SM_FIXEDSLCNUM_SLICE }, SM_SINGLE_SLICE, SM_RESERVED, VE, "slice_mode" }, |
| #else |
| { "slice_mode", "set slice mode", OFFSET(slice_mode), AV_OPT_TYPE_INT, { .i64 = SM_AUTO_SLICE }, SM_SINGLE_SLICE, SM_RESERVED, VE, "slice_mode" }, |
| #endif |
| { "fixed", "a fixed number of slices", 0, AV_OPT_TYPE_CONST, { .i64 = SM_FIXEDSLCNUM_SLICE }, 0, 0, VE, "slice_mode" }, |
| #if OPENH264_VER_AT_LEAST(1, 6) |
| { "dyn", "Size limited (compatibility name)", 0, AV_OPT_TYPE_CONST, { .i64 = SM_SIZELIMITED_SLICE }, 0, 0, VE, "slice_mode" }, |
| { "sizelimited", "Size limited", 0, AV_OPT_TYPE_CONST, { .i64 = SM_SIZELIMITED_SLICE }, 0, 0, VE, "slice_mode" }, |
| #else |
| { "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" }, |
| { "dyn", "Dynamic slicing", 0, AV_OPT_TYPE_CONST, { .i64 = SM_DYN_SLICE }, 0, 0, VE, "slice_mode" }, |
| #endif |
| { "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, { .str = NULL }, 0, 0, VE }, |
| { "max_nal_size", "set maximum NAL size in bytes", OFFSET(max_nal_size), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, INT_MAX, VE }, |
| { "allow_skip_frames", "allow skipping frames to hit the target bitrate", OFFSET(skip_frames), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, VE }, |
| { "cabac", "Enable cabac", OFFSET(cabac), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 1, VE }, |
| { NULL } |
| }; |
| |
| static const AVClass class = { |
| .class_name = "libopenh264enc", |
| .item_name = av_default_item_name, |
| .option = options, |
| .version = LIBAVUTIL_VERSION_INT, |
| }; |
| |
| static av_cold int svc_encode_close(AVCodecContext *avctx) |
| { |
| SVCContext *s = avctx->priv_data; |
| |
| if (s->encoder) |
| WelsDestroySVCEncoder(s->encoder); |
| if (s->skipped > 0) |
| av_log(avctx, AV_LOG_WARNING, "%d frames skipped\n", s->skipped); |
| return 0; |
| } |
| |
| static av_cold int svc_encode_init(AVCodecContext *avctx) |
| { |
| SVCContext *s = avctx->priv_data; |
| SEncParamExt param = { 0 }; |
| int err; |
| int log_level; |
| WelsTraceCallback callback_function; |
| AVCPBProperties *props; |
| |
| if ((err = ff_libopenh264_check_version(avctx)) < 0) |
| return err; |
| |
| if (WelsCreateSVCEncoder(&s->encoder)) { |
| av_log(avctx, AV_LOG_ERROR, "Unable to create encoder\n"); |
| return AVERROR_UNKNOWN; |
| } |
| |
| // Pass all libopenh264 messages to our callback, to allow ourselves to filter them. |
| log_level = WELS_LOG_DETAIL; |
| (*s->encoder)->SetOption(s->encoder, ENCODER_OPTION_TRACE_LEVEL, &log_level); |
| |
| // Set the logging callback function to one that uses av_log() (see implementation above). |
| callback_function = (WelsTraceCallback) ff_libopenh264_trace_callback; |
| (*s->encoder)->SetOption(s->encoder, ENCODER_OPTION_TRACE_CALLBACK, &callback_function); |
| |
| // Set the AVCodecContext as the libopenh264 callback context so that it can be passed to av_log(). |
| (*s->encoder)->SetOption(s->encoder, ENCODER_OPTION_TRACE_CALLBACK_CONTEXT, &avctx); |
| |
| (*s->encoder)->GetDefaultParams(s->encoder, ¶m); |
| |
| #if FF_API_CODER_TYPE |
| FF_DISABLE_DEPRECATION_WARNINGS |
| if (!s->cabac) |
| s->cabac = avctx->coder_type == FF_CODER_TYPE_AC; |
| FF_ENABLE_DEPRECATION_WARNINGS |
| #endif |
| |
| param.fMaxFrameRate = 1/av_q2d(avctx->time_base); |
| 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 = s->skip_frames; |
| 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 && s->cabac) |
| 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 OPENH264_VER_AT_LEAST(1, 7) |
| if (avctx->sample_aspect_ratio.num && avctx->sample_aspect_ratio.den) { |
| // Table E-1. |
| static const AVRational sar_idc[] = { |
| { 0, 0 }, // Unspecified (never written here). |
| { 1, 1 }, { 12, 11 }, { 10, 11 }, { 16, 11 }, |
| { 40, 33 }, { 24, 11 }, { 20, 11 }, { 32, 11 }, |
| { 80, 33 }, { 18, 11 }, { 15, 11 }, { 64, 33 }, |
| { 160, 99 }, // Last 3 are unknown to openh264: { 4, 3 }, { 3, 2 }, { 2, 1 }, |
| }; |
| static const ESampleAspectRatio asp_idc[] = { |
| ASP_UNSPECIFIED, |
| ASP_1x1, ASP_12x11, ASP_10x11, ASP_16x11, |
| ASP_40x33, ASP_24x11, ASP_20x11, ASP_32x11, |
| ASP_80x33, ASP_18x11, ASP_15x11, ASP_64x33, |
| ASP_160x99, |
| }; |
| int num, den, i; |
| |
| av_reduce(&num, &den, avctx->sample_aspect_ratio.num, |
| avctx->sample_aspect_ratio.den, 65535); |
| |
| for (i = 1; i < FF_ARRAY_ELEMS(sar_idc); i++) { |
| if (num == sar_idc[i].num && |
| den == sar_idc[i].den) |
| break; |
| } |
| if (i == FF_ARRAY_ELEMS(sar_idc)) { |
| param.sSpatialLayers[0].eAspectRatio = ASP_EXT_SAR; |
| param.sSpatialLayers[0].sAspectRatioExtWidth = num; |
| param.sSpatialLayers[0].sAspectRatioExtHeight = den; |
| } else { |
| param.sSpatialLayers[0].eAspectRatio = asp_idc[i]; |
| } |
| param.sSpatialLayers[0].bAspectRatioPresent = true; |
| } else { |
| param.sSpatialLayers[0].bAspectRatioPresent = false; |
| } |
| #endif |
| |
| if ((avctx->slices > 1) && (s->max_nal_size)) { |
| av_log(avctx, AV_LOG_ERROR, |
| "Invalid combination -slices %d and -max_nal_size %d.\n", |
| avctx->slices, s->max_nal_size); |
| return AVERROR(EINVAL); |
| } |
| |
| if (avctx->slices > 1) |
| s->slice_mode = SM_FIXEDSLCNUM_SLICE; |
| |
| if (s->max_nal_size) |
| s->slice_mode = SM_SIZELIMITED_SLICE; |
| |
| #if OPENH264_VER_AT_LEAST(1, 6) |
| param.sSpatialLayers[0].sSliceArgument.uiSliceMode = s->slice_mode; |
| param.sSpatialLayers[0].sSliceArgument.uiSliceNum = avctx->slices; |
| #else |
| param.sSpatialLayers[0].sSliceCfg.uiSliceMode = s->slice_mode; |
| param.sSpatialLayers[0].sSliceCfg.sSliceArgument.uiSliceNum = avctx->slices; |
| #endif |
| |
| if (s->slice_mode == SM_SIZELIMITED_SLICE) { |
| if (s->max_nal_size) { |
| param.uiMaxNalSize = s->max_nal_size; |
| #if OPENH264_VER_AT_LEAST(1, 6) |
| param.sSpatialLayers[0].sSliceArgument.uiSliceSizeConstraint = s->max_nal_size; |
| #else |
| param.sSpatialLayers[0].sSliceCfg.sSliceArgument.uiSliceSizeConstraint = s->max_nal_size; |
| #endif |
| } else { |
| av_log(avctx, AV_LOG_ERROR, "Invalid -max_nal_size, " |
| "specify a valid max_nal_size to use -slice_mode dyn\n"); |
| return AVERROR(EINVAL); |
| } |
| } |
| |
| if ((*s->encoder)->InitializeExt(s->encoder, ¶m) != cmResultSuccess) { |
| av_log(avctx, AV_LOG_ERROR, "Initialize failed\n"); |
| return AVERROR_UNKNOWN; |
| } |
| |
| if (avctx->flags & AV_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 + AV_INPUT_BUFFER_PADDING_SIZE); |
| if (!avctx->extradata) |
| return AVERROR(ENOMEM); |
| avctx->extradata_size = size; |
| memcpy(avctx->extradata, fbi.sLayerInfo[0].pBsBuf, size); |
| } |
| |
| props = ff_add_cpb_side_data(avctx); |
| if (!props) |
| return AVERROR(ENOMEM); |
| props->max_bitrate = param.iMaxBitrate; |
| props->avg_bitrate = param.iTargetBitrate; |
| |
| return 0; |
| } |
| |
| 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; |
| |
| if (frame->pict_type == AV_PICTURE_TYPE_I) { |
| (*s->encoder)->ForceIntraFrame(s->encoder, true); |
| } |
| |
| 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) { |
| s->skipped++; |
| 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 & AV_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_packet2(avctx, avpkt, size, 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 = AV_CODEC_CAP_AUTO_THREADS, |
| .caps_internal = FF_CODEC_CAP_INIT_THREADSAFE | FF_CODEC_CAP_INIT_CLEANUP, |
| .pix_fmts = (const enum AVPixelFormat[]){ AV_PIX_FMT_YUV420P, |
| AV_PIX_FMT_NONE }, |
| .priv_class = &class, |
| .wrapper_name = "libopenh264", |
| }; |
