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FFmpeg/libavcodec/libopenh264enc.c
Andreas Rheinhardt 0812a60fee avcodec/libopenh264enc: Allow user-supplied buffers 
Here the packet size is known before allocating the packet,
so that supporting user-supplied buffers is trivial.

Reviewed-by: James Almer <jamrial@gmail.com>
Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>
2021-05-23 14:43:32 +02:00

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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 "encode.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 (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_get_encode_buffer(avctx, avpkt, size, 0)))
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 },
};
const 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,
.capabilities = AV_CODEC_CAP_DR1 | AV_CODEC_CAP_OTHER_THREADS,
.priv_data_size = sizeof(SVCContext),
.init = svc_encode_init,
.encode2 = svc_encode_frame,
.close = svc_encode_close,
.caps_internal = FF_CODEC_CAP_INIT_THREADSAFE | FF_CODEC_CAP_INIT_CLEANUP |
FF_CODEC_CAP_AUTO_THREADS,
.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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