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FFmpeg/libavcodec/libopenh264enc.c
Jun Zhao becfdaaa09 lavc/libopenh264enc: use framerate if available 
Respecting the framerate in the libopenh264enc codec context.

Both the libx264 and libx265 encoders already contain similar logic
to first check the framerate before falling back to the timebase.

Reviewed-by: Martin Storsjö <martin@martin.st>
Signed-off-by: Jun Zhao <barryjzhao@tencent.com>
2020-08-05 17:32:16 +08:00

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/*
* 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
#define TARGET_BITRATE_DEFAULT 2*1000*1000
typedef struct SVCContext {
const AVClass *av_class;
ISVCEncoder *encoder;
int slice_mode;
int loopfilter;
int profile;
int max_nal_size;
int skip_frames;
int skipped;
#if FF_API_OPENH264_CABAC
int cabac; // deprecated
#endif
int coder;
// rate control mode
int rc_mode;
} SVCContext;
#define OFFSET(x) offsetof(SVCContext, x)
#define VE AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_ENCODING_PARAM
#define DEPRECATED AV_OPT_FLAG_DEPRECATED
static const AVOption options[] = {
#if FF_API_OPENH264_SLICE_MODE
#if OPENH264_VER_AT_LEAST(1, 6)
{ "slice_mode", "set slice mode, use slices/max_nal_size", OFFSET(slice_mode), AV_OPT_TYPE_INT, { .i64 = SM_FIXEDSLCNUM_SLICE }, SM_SINGLE_SLICE, SM_RESERVED, VE|DEPRECATED, "slice_mode" },
#else
{ "slice_mode", "set slice mode, use slices/max_nal_size", OFFSET(slice_mode), AV_OPT_TYPE_INT, { .i64 = SM_AUTO_SLICE }, SM_SINGLE_SLICE, SM_RESERVED, VE|DEPRECATED, "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
#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_INT, { .i64 = FF_PROFILE_UNKNOWN }, FF_PROFILE_UNKNOWN, 0xffff, VE, "profile" },
#define PROFILE(name, value) name, NULL, 0, AV_OPT_TYPE_CONST, { .i64 = value }, 0, 0, VE, "profile"
{ PROFILE("constrained_baseline", FF_PROFILE_H264_CONSTRAINED_BASELINE) },
{ PROFILE("main", FF_PROFILE_H264_MAIN) },
{ PROFILE("high", FF_PROFILE_H264_HIGH) },
#undef PROFILE
{ "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 },
#if FF_API_OPENH264_CABAC
{ "cabac", "Enable cabac(deprecated, use coder)", OFFSET(cabac), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 1, VE|DEPRECATED },
#endif
{ "coder", "Coder type", OFFSET(coder), AV_OPT_TYPE_INT, { .i64 = -1 }, -1, 1, VE, "coder" },
{ "default", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = -1 }, INT_MIN, INT_MAX, VE, "coder" },
{ "cavlc", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = 0 }, INT_MIN, INT_MAX, VE, "coder" },
{ "cabac", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = 1 }, INT_MIN, INT_MAX, VE, "coder" },
{ "vlc", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = 0 }, INT_MIN, INT_MAX, VE, "coder" },
{ "ac", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = 1 }, INT_MIN, INT_MAX, VE, "coder" },
{ "rc_mode", "Select rate control mode", OFFSET(rc_mode), AV_OPT_TYPE_INT, { .i64 = RC_QUALITY_MODE }, RC_OFF_MODE, RC_TIMESTAMP_MODE, VE, "rc_mode" },
{ "off", "bit rate control off", 0, AV_OPT_TYPE_CONST, { .i64 = RC_OFF_MODE }, 0, 0, VE, "rc_mode" },
{ "quality", "quality mode", 0, AV_OPT_TYPE_CONST, { .i64 = RC_QUALITY_MODE }, 0, 0, VE, "rc_mode" },
{ "bitrate", "bitrate mode", 0, AV_OPT_TYPE_CONST, { .i64 = RC_BITRATE_MODE }, 0, 0, VE, "rc_mode" },
{ "buffer", "using buffer status to adjust the video quality (no bitrate control)", 0, AV_OPT_TYPE_CONST, { .i64 = RC_BUFFERBASED_MODE }, 0, 0, VE, "rc_mode" },
#if OPENH264_VER_AT_LEAST(1, 4)
{ "timestamp", "bit rate control based on timestamp", 0, AV_OPT_TYPE_CONST, { .i64 = RC_TIMESTAMP_MODE }, 0, 0, VE, "rc_mode" },
#endif
{ 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, &param);
if (avctx->framerate.num > 0 && avctx->framerate.den > 0) {
param.fMaxFrameRate = av_q2d(avctx->framerate);
} else {
if (avctx->ticks_per_frame > INT_MAX / avctx->time_base.num) {
av_log(avctx, AV_LOG_ERROR,
"Could not set framerate for libopenh264enc: integer overflow\n");
return AVERROR(EINVAL);
}
param.fMaxFrameRate = 1.0 / av_q2d(avctx->time_base) / FFMAX(avctx->ticks_per_frame, 1);
}
param.iPicWidth = avctx->width;
param.iPicHeight = avctx->height;
param.iTargetBitrate = avctx->bit_rate > 0 ? avctx->bit_rate : TARGET_BITRATE_DEFAULT;
param.iMaxBitrate = FFMAX(avctx->rc_max_rate, avctx->bit_rate);
param.iRCMode = s->rc_mode;
if (avctx->qmax >= 0)
param.iMaxQp = av_clip(avctx->qmax, 1, 51);
if (avctx->qmin >= 0)
param.iMinQp = av_clip(avctx->qmin, 1, param.iMaxQp);
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;
if (avctx->gop_size >= 0)
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;
/* Allow specifying the libopenh264 profile through AVCodecContext. */
if (FF_PROFILE_UNKNOWN == s->profile &&
FF_PROFILE_UNKNOWN != avctx->profile)
switch (avctx->profile) {
case FF_PROFILE_H264_HIGH:
case FF_PROFILE_H264_MAIN:
case FF_PROFILE_H264_CONSTRAINED_BASELINE:
s->profile = avctx->profile;
break;
default:
av_log(avctx, AV_LOG_WARNING,
"Unsupported avctx->profile: %d.\n", avctx->profile);
break;
}
#if FF_API_CODER_TYPE && FF_API_OPENH264_CABAC
FF_DISABLE_DEPRECATION_WARNINGS
if (s->coder < 0 && avctx->coder_type == FF_CODER_TYPE_AC)
s->coder = 1;
if (s->coder < 0)
s->coder = s->cabac;
FF_ENABLE_DEPRECATION_WARNINGS
#endif
if (s->profile == FF_PROFILE_UNKNOWN && s->coder >= 0)
s->profile = s->coder == 0 ? FF_PROFILE_H264_CONSTRAINED_BASELINE :
#if OPENH264_VER_AT_LEAST(1, 8)
FF_PROFILE_H264_HIGH;
#else
FF_PROFILE_H264_MAIN;
#endif
switch (s->profile) {
#if OPENH264_VER_AT_LEAST(1, 8)
case FF_PROFILE_H264_HIGH:
param.iEntropyCodingModeFlag = 1;
av_log(avctx, AV_LOG_VERBOSE, "Using CABAC, "
"select EProfileIdc PRO_HIGH in libopenh264.\n");
break;
#else
case FF_PROFILE_H264_MAIN:
param.iEntropyCodingModeFlag = 1;
av_log(avctx, AV_LOG_VERBOSE, "Using CABAC, "
"select EProfileIdc PRO_MAIN in libopenh264.\n");
break;
#endif
case FF_PROFILE_H264_CONSTRAINED_BASELINE:
case FF_PROFILE_UNKNOWN:
param.iEntropyCodingModeFlag = 0;
av_log(avctx, AV_LOG_VERBOSE, "Using CAVLC, "
"select EProfileIdc PRO_BASELINE in libopenh264.\n");
break;
default:
param.iEntropyCodingModeFlag = 0;
av_log(avctx, AV_LOG_WARNING, "Unsupported profile, "
"select EProfileIdc PRO_BASELINE in libopenh264.\n");
break;
}
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 (avctx->slices == 0 && s->slice_mode == SM_FIXEDSLCNUM_SLICE)
av_log(avctx, AV_LOG_WARNING, "Slice count will be set automatically\n");
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, &param) != 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;
}
static const AVCodecDefault svc_enc_defaults[] = {
{ "b", "0" },
{ "g", "-1" },
{ "qmin", "-1" },
{ "qmax", "-1" },
{ NULL },
};
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 },
.defaults = svc_enc_defaults,
.priv_class = &class,
.wrapper_name = "libopenh264",
};
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