libavcodec/libopenh264enc.c - nest-android-app/ffmpeg - Git at Google

 /*
  * 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"

 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 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", "set 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" },
         { "dyn", "Dynamic slicing", 0, AV_OPT_TYPE_CONST, { .i64 = SM_DYN_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, { .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 = {
     "libopenh264enc", av_default_item_name, options, LIBAVUTIL_VERSION_INT
 };

 // Convert libopenh264 log level to equivalent ffmpeg log level.
 static int libopenh264_to_ffmpeg_log_level(int libopenh264_log_level)
 {
     if      (libopenh264_log_level >= WELS_LOG_DETAIL)  return AV_LOG_TRACE;
     else if (libopenh264_log_level >= WELS_LOG_DEBUG)   return AV_LOG_DEBUG;
     else if (libopenh264_log_level >= WELS_LOG_INFO)    return AV_LOG_VERBOSE;
     else if (libopenh264_log_level >= WELS_LOG_WARNING) return AV_LOG_WARNING;
     else if (libopenh264_log_level >= WELS_LOG_ERROR)   return AV_LOG_ERROR;
     else                                                return AV_LOG_QUIET;
 }

 // This function will be provided to the libopenh264 library.  The function will be called
 // when libopenh264 wants to log a message (error, warning, info, etc.).  The signature for
 // this function (defined in .../codec/api/svc/codec_api.h) is:
 //
 //        typedef void (*WelsTraceCallback) (void* ctx, int level, const char* string);

 static void libopenh264_trace_callback(void *ctx, int level, char const *msg)
 {
     // The message will be logged only if the requested EQUIVALENT ffmpeg log level is
     // less than or equal to the current ffmpeg log level.
     int equiv_ffmpeg_log_level = libopenh264_to_ffmpeg_log_level(level);
     av_log(ctx, equiv_ffmpeg_log_level, "%s\n", msg);
 }

 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 = AVERROR_UNKNOWN;
     int log_level;
     WelsTraceCallback callback_function;
     AVCPBProperties *props;

     // 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;
     }

     // 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) libopenh264_trace_callback;
     (*s->encoder)->SetOption(s->encoder, ENCODER_OPTION_TRACE_CALLBACK, (void *)&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, (void *)&avctx);

     (*s->encoder)->GetDefaultParams(s->encoder, &param);

 #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 ((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);
         goto fail;
     }

     if (avctx->slices > 1)
         s->slice_mode = SM_FIXEDSLCNUM_SLICE;

     if (s->max_nal_size)
         s->slice_mode = SM_DYN_SLICE;

     param.sSpatialLayers[0].sSliceCfg.uiSliceMode               = s->slice_mode;
     param.sSpatialLayers[0].sSliceCfg.sSliceArgument.uiSliceNum = avctx->slices;

     if (s->slice_mode == SM_DYN_SLICE) {
         if (s->max_nal_size){
             param.uiMaxNalSize = s->max_nal_size;
             param.sSpatialLayers[0].sSliceCfg.sSliceArgument.uiSliceSizeConstraint = s->max_nal_size;
         } else {
             av_log(avctx, AV_LOG_ERROR, "Invalid -max_nal_size, "
                    "specify a valid max_nal_size to use -slice_mode dyn\n");
             goto fail;
         }
     }

     if ((*s->encoder)->InitializeExt(s->encoder, &param) != cmResultSuccess) {
         av_log(avctx, AV_LOG_ERROR, "Initialize failed\n");
         goto fail;
     }

     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) {
             err = AVERROR(ENOMEM);
             goto fail;
         }
         avctx->extradata_size = size;
         memcpy(avctx->extradata, fbi.sLayerInfo[0].pBsBuf, size);
     }

     props = ff_add_cpb_side_data(avctx);
     if (!props) {
         err = AVERROR(ENOMEM);
         goto fail;
     }
     props->max_bitrate = param.iMaxBitrate;
     props->avg_bitrate = param.iTargetBitrate;

     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) {
         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,
     .pix_fmts       = (const enum AVPixelFormat[]){ AV_PIX_FMT_YUV420P,
                                                     AV_PIX_FMT_NONE },
     .priv_class     = &class,
 };
	/*
	* 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"

	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 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", "set 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" },
	{ "dyn", "Dynamic slicing", 0, AV_OPT_TYPE_CONST, { .i64 = SM_DYN_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, { .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 = {
	"libopenh264enc", av_default_item_name, options, LIBAVUTIL_VERSION_INT
	};

	// Convert libopenh264 log level to equivalent ffmpeg log level.
	static int libopenh264_to_ffmpeg_log_level(int libopenh264_log_level)
	{
	if (libopenh264_log_level >= WELS_LOG_DETAIL) return AV_LOG_TRACE;
	else if (libopenh264_log_level >= WELS_LOG_DEBUG) return AV_LOG_DEBUG;
	else if (libopenh264_log_level >= WELS_LOG_INFO) return AV_LOG_VERBOSE;
	else if (libopenh264_log_level >= WELS_LOG_WARNING) return AV_LOG_WARNING;
	else if (libopenh264_log_level >= WELS_LOG_ERROR) return AV_LOG_ERROR;
	else return AV_LOG_QUIET;
	}

	// This function will be provided to the libopenh264 library. The function will be called
	// when libopenh264 wants to log a message (error, warning, info, etc.). The signature for
	// this function (defined in .../codec/api/svc/codec_api.h) is:
	//
	// typedef void (WelsTraceCallback) (void ctx, int level, const char* string);

	static void libopenh264_trace_callback(void ctx, int level, char const msg)
	{
	// The message will be logged only if the requested EQUIVALENT ffmpeg log level is
	// less than or equal to the current ffmpeg log level.
	int equiv_ffmpeg_log_level = libopenh264_to_ffmpeg_log_level(level);
	av_log(ctx, equiv_ffmpeg_log_level, "%s\n", msg);
	}

	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 = AVERROR_UNKNOWN;
	int log_level;
	WelsTraceCallback callback_function;
	AVCPBProperties *props;

	// 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;
	}

	// 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) libopenh264_trace_callback;
	(s->encoder)->SetOption(s->encoder, ENCODER_OPTION_TRACE_CALLBACK, (void )&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, (void )&avctx);

	(*s->encoder)->GetDefaultParams(s->encoder, &param);

	#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 ((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);
	goto fail;
	}

	if (avctx->slices > 1)
	s->slice_mode = SM_FIXEDSLCNUM_SLICE;

	if (s->max_nal_size)
	s->slice_mode = SM_DYN_SLICE;

	param.sSpatialLayers[0].sSliceCfg.uiSliceMode = s->slice_mode;
	param.sSpatialLayers[0].sSliceCfg.sSliceArgument.uiSliceNum = avctx->slices;

	if (s->slice_mode == SM_DYN_SLICE) {
	if (s->max_nal_size){
	param.uiMaxNalSize = s->max_nal_size;
	param.sSpatialLayers[0].sSliceCfg.sSliceArgument.uiSliceSizeConstraint = s->max_nal_size;
	} else {
	av_log(avctx, AV_LOG_ERROR, "Invalid -max_nal_size, "
	"specify a valid max_nal_size to use -slice_mode dyn\n");
	goto fail;
	}
	}

	if ((*s->encoder)->InitializeExt(s->encoder, &param) != cmResultSuccess) {
	av_log(avctx, AV_LOG_ERROR, "Initialize failed\n");
	goto fail;
	}

	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) {
	err = AVERROR(ENOMEM);
	goto fail;
	}
	avctx->extradata_size = size;
	memcpy(avctx->extradata, fbi.sLayerInfo[0].pBsBuf, size);
	}

	props = ff_add_cpb_side_data(avctx);
	if (!props) {
	err = AVERROR(ENOMEM);
	goto fail;
	}
	props->max_bitrate = param.iMaxBitrate;
	props->avg_bitrate = param.iTargetBitrate;

	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) {
	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,
	.pix_fmts = (const enum AVPixelFormat[]){ AV_PIX_FMT_YUV420P,
	AV_PIX_FMT_NONE },
	.priv_class = &class,
	};