libavcodec/libx264.c - vendor/opensource/ffmpeg - Git at Google

 /*
  * H.264 encoding using the x264 library
  * Copyright (C) 2005  Mans Rullgard <mans@mansr.com>
  *
  * 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 "avcodec.h"
 #include <x264.h>
 #include <math.h>
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>

 typedef struct X264Context {
     x264_param_t params;
     x264_t *enc;
     x264_picture_t pic;
     AVFrame out_pic;
 } X264Context;

 static void
 X264_log(void *p, int level, const char *fmt, va_list args)
 {
     static const int level_map[] = {
         [X264_LOG_ERROR]   = AV_LOG_ERROR,
         [X264_LOG_WARNING] = AV_LOG_WARNING,
         [X264_LOG_INFO]    = AV_LOG_INFO,
         [X264_LOG_DEBUG]   = AV_LOG_DEBUG
     };

     if(level < 0 || level > X264_LOG_DEBUG)
         return;

     av_vlog(p, level_map[level], fmt, args);
 }


 static int
 encode_nals(uint8_t *buf, int size, x264_nal_t *nals, int nnal)
 {
     uint8_t *p = buf;
     int i;

     for(i = 0; i < nnal; i++){
         int s = x264_nal_encode(p, &size, 1, nals + i);
         if(s < 0)
             return -1;
         p += s;
     }

     return p - buf;
 }

 static int
 X264_frame(AVCodecContext *ctx, uint8_t *buf, int bufsize, void *data)
 {
     X264Context *x4 = ctx->priv_data;
     AVFrame *frame = data;
     x264_nal_t *nal;
     int nnal, i;
     x264_picture_t pic_out;

     x4->pic.img.i_csp = X264_CSP_I420;
     x4->pic.img.i_plane = 3;

     if (frame) {
         for(i = 0; i < 3; i++){
             x4->pic.img.plane[i] = frame->data[i];
             x4->pic.img.i_stride[i] = frame->linesize[i];
         }

         x4->pic.i_pts = frame->pts;
         x4->pic.i_type = X264_TYPE_AUTO;
     }

     if(x264_encoder_encode(x4->enc, &nal, &nnal, frame? &x4->pic: NULL,
                            &pic_out))
         return -1;

     bufsize = encode_nals(buf, bufsize, nal, nnal);
     if(bufsize < 0)
         return -1;

     /* FIXME: dts */
     x4->out_pic.pts = pic_out.i_pts;

     switch(pic_out.i_type){
     case X264_TYPE_IDR:
     case X264_TYPE_I:
         x4->out_pic.pict_type = FF_I_TYPE;
         break;
     case X264_TYPE_P:
         x4->out_pic.pict_type = FF_P_TYPE;
         break;
     case X264_TYPE_B:
     case X264_TYPE_BREF:
         x4->out_pic.pict_type = FF_B_TYPE;
         break;
     }

     x4->out_pic.key_frame = pic_out.i_type == X264_TYPE_IDR;
     x4->out_pic.quality = (pic_out.i_qpplus1 - 1) * FF_QP2LAMBDA;

     return bufsize;
 }

 static av_cold int
 X264_close(AVCodecContext *avctx)
 {
     X264Context *x4 = avctx->priv_data;

     av_freep(&avctx->extradata);

     if(x4->enc)
         x264_encoder_close(x4->enc);

     return 0;
 }

 static av_cold int
 X264_init(AVCodecContext *avctx)
 {
     X264Context *x4 = avctx->priv_data;

     x264_param_default(&x4->params);

     x4->params.pf_log = X264_log;
     x4->params.p_log_private = avctx;

     x4->params.i_keyint_max = avctx->gop_size;
     x4->params.rc.i_bitrate = avctx->bit_rate / 1000;
     x4->params.rc.i_vbv_buffer_size = avctx->rc_buffer_size / 1000;
     x4->params.rc.i_vbv_max_bitrate = avctx->rc_max_rate / 1000;
     x4->params.rc.b_stat_write = avctx->flags & CODEC_FLAG_PASS1;
     if(avctx->flags & CODEC_FLAG_PASS2) x4->params.rc.b_stat_read = 1;
     else{
         if(avctx->crf){
             x4->params.rc.i_rc_method = X264_RC_CRF;
             x4->params.rc.f_rf_constant = avctx->crf;
         }else if(avctx->cqp > -1){
             x4->params.rc.i_rc_method = X264_RC_CQP;
             x4->params.rc.i_qp_constant = avctx->cqp;
         }
     }

     // if neither crf nor cqp modes are selected we have to enable the RC
     // we do it this way because we cannot check if the bitrate has been set
     if(!(avctx->crf || (avctx->cqp > -1))) x4->params.rc.i_rc_method = X264_RC_ABR;

     x4->params.i_bframe = avctx->max_b_frames;
     x4->params.b_cabac = avctx->coder_type == FF_CODER_TYPE_AC;
     x4->params.i_bframe_adaptive = avctx->b_frame_strategy;
     x4->params.i_bframe_bias = avctx->bframebias;
     x4->params.b_bframe_pyramid = avctx->flags2 & CODEC_FLAG2_BPYRAMID;
     avctx->has_b_frames= avctx->flags2 & CODEC_FLAG2_BPYRAMID ? 2 : !!avctx->max_b_frames;

     x4->params.i_keyint_min = avctx->keyint_min;
     if(x4->params.i_keyint_min > x4->params.i_keyint_max)
         x4->params.i_keyint_min = x4->params.i_keyint_max;

     x4->params.i_scenecut_threshold = avctx->scenechange_threshold;

     x4->params.b_deblocking_filter = avctx->flags & CODEC_FLAG_LOOP_FILTER;
     x4->params.i_deblocking_filter_alphac0 = avctx->deblockalpha;
     x4->params.i_deblocking_filter_beta = avctx->deblockbeta;

     x4->params.rc.i_qp_min = avctx->qmin;
     x4->params.rc.i_qp_max = avctx->qmax;
     x4->params.rc.i_qp_step = avctx->max_qdiff;

     x4->params.rc.f_qcompress = avctx->qcompress;  /* 0.0 => cbr, 1.0 => constant qp */
     x4->params.rc.f_qblur = avctx->qblur;        /* temporally blur quants */
     x4->params.rc.f_complexity_blur = avctx->complexityblur;

     x4->params.i_frame_reference = avctx->refs;

     x4->params.i_width = avctx->width;
     x4->params.i_height = avctx->height;
     x4->params.vui.i_sar_width = avctx->sample_aspect_ratio.num;
     x4->params.vui.i_sar_height = avctx->sample_aspect_ratio.den;
     x4->params.i_fps_num = avctx->time_base.den;
     x4->params.i_fps_den = avctx->time_base.num;

     x4->params.analyse.inter = 0;
     if(avctx->partitions){
         if(avctx->partitions & X264_PART_I4X4)
             x4->params.analyse.inter |= X264_ANALYSE_I4x4;
         if(avctx->partitions & X264_PART_I8X8)
             x4->params.analyse.inter |= X264_ANALYSE_I8x8;
         if(avctx->partitions & X264_PART_P8X8)
             x4->params.analyse.inter |= X264_ANALYSE_PSUB16x16;
         if(avctx->partitions & X264_PART_P4X4)
             x4->params.analyse.inter |= X264_ANALYSE_PSUB8x8;
         if(avctx->partitions & X264_PART_B8X8)
             x4->params.analyse.inter |= X264_ANALYSE_BSUB16x16;
     }

     x4->params.analyse.i_direct_mv_pred = avctx->directpred;

     x4->params.analyse.b_weighted_bipred = avctx->flags2 & CODEC_FLAG2_WPRED;

     if(avctx->me_method == ME_EPZS)
         x4->params.analyse.i_me_method = X264_ME_DIA;
     else if(avctx->me_method == ME_HEX)
         x4->params.analyse.i_me_method = X264_ME_HEX;
     else if(avctx->me_method == ME_UMH)
         x4->params.analyse.i_me_method = X264_ME_UMH;
     else if(avctx->me_method == ME_FULL)
         x4->params.analyse.i_me_method = X264_ME_ESA;
     else if(avctx->me_method == ME_TESA)
         x4->params.analyse.i_me_method = X264_ME_TESA;
     else x4->params.analyse.i_me_method = X264_ME_HEX;

     x4->params.analyse.i_me_range = avctx->me_range;
     x4->params.analyse.i_subpel_refine = avctx->me_subpel_quality;

     x4->params.analyse.b_mixed_references =
         avctx->flags2 & CODEC_FLAG2_MIXED_REFS;
     x4->params.analyse.b_chroma_me = avctx->me_cmp & FF_CMP_CHROMA;
     x4->params.analyse.b_transform_8x8 = avctx->flags2 & CODEC_FLAG2_8X8DCT;
     x4->params.analyse.b_fast_pskip = avctx->flags2 & CODEC_FLAG2_FASTPSKIP;

     x4->params.analyse.i_trellis = avctx->trellis;
     x4->params.analyse.i_noise_reduction = avctx->noise_reduction;

     if(avctx->level > 0) x4->params.i_level_idc = avctx->level;

     x4->params.rc.f_rate_tolerance =
         (float)avctx->bit_rate_tolerance/avctx->bit_rate;

     if((avctx->rc_buffer_size != 0) &&
             (avctx->rc_initial_buffer_occupancy <= avctx->rc_buffer_size)){
         x4->params.rc.f_vbv_buffer_init =
             (float)avctx->rc_initial_buffer_occupancy/avctx->rc_buffer_size;
     }
     else x4->params.rc.f_vbv_buffer_init = 0.9;

     x4->params.rc.f_ip_factor = 1/fabs(avctx->i_quant_factor);
     x4->params.rc.f_pb_factor = avctx->b_quant_factor;
     x4->params.analyse.i_chroma_qp_offset = avctx->chromaoffset;

     x4->params.analyse.b_psnr = avctx->flags & CODEC_FLAG_PSNR;
     x4->params.i_log_level = X264_LOG_DEBUG;

     x4->params.b_aud = avctx->flags2 & CODEC_FLAG2_AUD;

     x4->params.i_threads = avctx->thread_count;

     x4->params.b_interlaced = avctx->flags & CODEC_FLAG_INTERLACED_DCT;

     if(avctx->flags & CODEC_FLAG_GLOBAL_HEADER){
         x4->params.b_repeat_headers = 0;
     }

     x4->enc = x264_encoder_open(&x4->params);
     if(!x4->enc)
         return -1;

     avctx->coded_frame = &x4->out_pic;

     if(avctx->flags & CODEC_FLAG_GLOBAL_HEADER){
         x264_nal_t *nal;
         int nnal, i, s = 0;

         x264_encoder_headers(x4->enc, &nal, &nnal);

         /* 5 bytes NAL header + worst case escaping */
         for(i = 0; i < nnal; i++)
             s += 5 + nal[i].i_payload * 4 / 3;

         avctx->extradata = av_malloc(s);
         avctx->extradata_size = encode_nals(avctx->extradata, s, nal, nnal);
     }

     return 0;
 }

 AVCodec libx264_encoder = {
     .name = "libx264",
     .type = CODEC_TYPE_VIDEO,
     .id = CODEC_ID_H264,
     .priv_data_size = sizeof(X264Context),
     .init = X264_init,
     .encode = X264_frame,
     .close = X264_close,
     .capabilities = CODEC_CAP_DELAY,
     .pix_fmts = (enum PixelFormat[]) { PIX_FMT_YUV420P, PIX_FMT_NONE },
     .long_name = NULL_IF_CONFIG_SMALL("libx264 H.264 / AVC / MPEG-4 AVC / MPEG-4 part 10"),
 };
	/*
	* H.264 encoding using the x264 library
	* Copyright (C) 2005 Mans Rullgard <mans@mansr.com>
	*
	* 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 "avcodec.h"
	#include <x264.h>
	#include <math.h>
	#include <stdio.h>
	#include <stdlib.h>
	#include <string.h>

	typedef struct X264Context {
	x264_param_t params;
	x264_t *enc;
	x264_picture_t pic;
	AVFrame out_pic;
	} X264Context;

	static void
	X264_log(void p, int level, const char fmt, va_list args)
	{
	static const int level_map[] = {
	[X264_LOG_ERROR] = AV_LOG_ERROR,
	[X264_LOG_WARNING] = AV_LOG_WARNING,
	[X264_LOG_INFO] = AV_LOG_INFO,
	[X264_LOG_DEBUG] = AV_LOG_DEBUG
	};

	if(level < 0 \|\| level > X264_LOG_DEBUG)
	return;

	av_vlog(p, level_map[level], fmt, args);
	}


	static int
	encode_nals(uint8_t buf, int size, x264_nal_t nals, int nnal)
	{
	uint8_t *p = buf;
	int i;

	for(i = 0; i < nnal; i++){
	int s = x264_nal_encode(p, &size, 1, nals + i);
	if(s < 0)
	return -1;
	p += s;
	}

	return p - buf;
	}

	static int
	X264_frame(AVCodecContext ctx, uint8_t buf, int bufsize, void *data)
	{
	X264Context *x4 = ctx->priv_data;
	AVFrame *frame = data;
	x264_nal_t *nal;
	int nnal, i;
	x264_picture_t pic_out;

	x4->pic.img.i_csp = X264_CSP_I420;
	x4->pic.img.i_plane = 3;

	if (frame) {
	for(i = 0; i < 3; i++){
	x4->pic.img.plane[i] = frame->data[i];
	x4->pic.img.i_stride[i] = frame->linesize[i];
	}

	x4->pic.i_pts = frame->pts;
	x4->pic.i_type = X264_TYPE_AUTO;
	}

	if(x264_encoder_encode(x4->enc, &nal, &nnal, frame? &x4->pic: NULL,
	&pic_out))
	return -1;

	bufsize = encode_nals(buf, bufsize, nal, nnal);
	if(bufsize < 0)
	return -1;

	/* FIXME: dts */
	x4->out_pic.pts = pic_out.i_pts;

	switch(pic_out.i_type){
	case X264_TYPE_IDR:
	case X264_TYPE_I:
	x4->out_pic.pict_type = FF_I_TYPE;
	break;
	case X264_TYPE_P:
	x4->out_pic.pict_type = FF_P_TYPE;
	break;
	case X264_TYPE_B:
	case X264_TYPE_BREF:
	x4->out_pic.pict_type = FF_B_TYPE;
	break;
	}

	x4->out_pic.key_frame = pic_out.i_type == X264_TYPE_IDR;
	x4->out_pic.quality = (pic_out.i_qpplus1 - 1) * FF_QP2LAMBDA;

	return bufsize;
	}

	static av_cold int
	X264_close(AVCodecContext *avctx)
	{
	X264Context *x4 = avctx->priv_data;

	av_freep(&avctx->extradata);

	if(x4->enc)
	x264_encoder_close(x4->enc);

	return 0;
	}

	static av_cold int
	X264_init(AVCodecContext *avctx)
	{
	X264Context *x4 = avctx->priv_data;

	x264_param_default(&x4->params);

	x4->params.pf_log = X264_log;
	x4->params.p_log_private = avctx;

	x4->params.i_keyint_max = avctx->gop_size;
	x4->params.rc.i_bitrate = avctx->bit_rate / 1000;
	x4->params.rc.i_vbv_buffer_size = avctx->rc_buffer_size / 1000;
	x4->params.rc.i_vbv_max_bitrate = avctx->rc_max_rate / 1000;
	x4->params.rc.b_stat_write = avctx->flags & CODEC_FLAG_PASS1;
	if(avctx->flags & CODEC_FLAG_PASS2) x4->params.rc.b_stat_read = 1;
	else{
	if(avctx->crf){
	x4->params.rc.i_rc_method = X264_RC_CRF;
	x4->params.rc.f_rf_constant = avctx->crf;
	}else if(avctx->cqp > -1){
	x4->params.rc.i_rc_method = X264_RC_CQP;
	x4->params.rc.i_qp_constant = avctx->cqp;
	}
	}

	// if neither crf nor cqp modes are selected we have to enable the RC
	// we do it this way because we cannot check if the bitrate has been set
	if(!(avctx->crf \|\| (avctx->cqp > -1))) x4->params.rc.i_rc_method = X264_RC_ABR;

	x4->params.i_bframe = avctx->max_b_frames;
	x4->params.b_cabac = avctx->coder_type == FF_CODER_TYPE_AC;
	x4->params.i_bframe_adaptive = avctx->b_frame_strategy;
	x4->params.i_bframe_bias = avctx->bframebias;
	x4->params.b_bframe_pyramid = avctx->flags2 & CODEC_FLAG2_BPYRAMID;
	avctx->has_b_frames= avctx->flags2 & CODEC_FLAG2_BPYRAMID ? 2 : !!avctx->max_b_frames;

	x4->params.i_keyint_min = avctx->keyint_min;
	if(x4->params.i_keyint_min > x4->params.i_keyint_max)
	x4->params.i_keyint_min = x4->params.i_keyint_max;

	x4->params.i_scenecut_threshold = avctx->scenechange_threshold;

	x4->params.b_deblocking_filter = avctx->flags & CODEC_FLAG_LOOP_FILTER;
	x4->params.i_deblocking_filter_alphac0 = avctx->deblockalpha;
	x4->params.i_deblocking_filter_beta = avctx->deblockbeta;

	x4->params.rc.i_qp_min = avctx->qmin;
	x4->params.rc.i_qp_max = avctx->qmax;
	x4->params.rc.i_qp_step = avctx->max_qdiff;

	x4->params.rc.f_qcompress = avctx->qcompress; /* 0.0 => cbr, 1.0 => constant qp */
	x4->params.rc.f_qblur = avctx->qblur; /* temporally blur quants */
	x4->params.rc.f_complexity_blur = avctx->complexityblur;

	x4->params.i_frame_reference = avctx->refs;

	x4->params.i_width = avctx->width;
	x4->params.i_height = avctx->height;
	x4->params.vui.i_sar_width = avctx->sample_aspect_ratio.num;
	x4->params.vui.i_sar_height = avctx->sample_aspect_ratio.den;
	x4->params.i_fps_num = avctx->time_base.den;
	x4->params.i_fps_den = avctx->time_base.num;

	x4->params.analyse.inter = 0;
	if(avctx->partitions){
	if(avctx->partitions & X264_PART_I4X4)
	x4->params.analyse.inter \|= X264_ANALYSE_I4x4;
	if(avctx->partitions & X264_PART_I8X8)
	x4->params.analyse.inter \|= X264_ANALYSE_I8x8;
	if(avctx->partitions & X264_PART_P8X8)
	x4->params.analyse.inter \|= X264_ANALYSE_PSUB16x16;
	if(avctx->partitions & X264_PART_P4X4)
	x4->params.analyse.inter \|= X264_ANALYSE_PSUB8x8;
	if(avctx->partitions & X264_PART_B8X8)
	x4->params.analyse.inter \|= X264_ANALYSE_BSUB16x16;
	}

	x4->params.analyse.i_direct_mv_pred = avctx->directpred;

	x4->params.analyse.b_weighted_bipred = avctx->flags2 & CODEC_FLAG2_WPRED;

	if(avctx->me_method == ME_EPZS)
	x4->params.analyse.i_me_method = X264_ME_DIA;
	else if(avctx->me_method == ME_HEX)
	x4->params.analyse.i_me_method = X264_ME_HEX;
	else if(avctx->me_method == ME_UMH)
	x4->params.analyse.i_me_method = X264_ME_UMH;
	else if(avctx->me_method == ME_FULL)
	x4->params.analyse.i_me_method = X264_ME_ESA;
	else if(avctx->me_method == ME_TESA)
	x4->params.analyse.i_me_method = X264_ME_TESA;
	else x4->params.analyse.i_me_method = X264_ME_HEX;

	x4->params.analyse.i_me_range = avctx->me_range;
	x4->params.analyse.i_subpel_refine = avctx->me_subpel_quality;

	x4->params.analyse.b_mixed_references =
	avctx->flags2 & CODEC_FLAG2_MIXED_REFS;
	x4->params.analyse.b_chroma_me = avctx->me_cmp & FF_CMP_CHROMA;
	x4->params.analyse.b_transform_8x8 = avctx->flags2 & CODEC_FLAG2_8X8DCT;
	x4->params.analyse.b_fast_pskip = avctx->flags2 & CODEC_FLAG2_FASTPSKIP;

	x4->params.analyse.i_trellis = avctx->trellis;
	x4->params.analyse.i_noise_reduction = avctx->noise_reduction;

	if(avctx->level > 0) x4->params.i_level_idc = avctx->level;

	x4->params.rc.f_rate_tolerance =
	(float)avctx->bit_rate_tolerance/avctx->bit_rate;

	if((avctx->rc_buffer_size != 0) &&
	(avctx->rc_initial_buffer_occupancy <= avctx->rc_buffer_size)){
	x4->params.rc.f_vbv_buffer_init =
	(float)avctx->rc_initial_buffer_occupancy/avctx->rc_buffer_size;
	}
	else x4->params.rc.f_vbv_buffer_init = 0.9;

	x4->params.rc.f_ip_factor = 1/fabs(avctx->i_quant_factor);
	x4->params.rc.f_pb_factor = avctx->b_quant_factor;
	x4->params.analyse.i_chroma_qp_offset = avctx->chromaoffset;

	x4->params.analyse.b_psnr = avctx->flags & CODEC_FLAG_PSNR;
	x4->params.i_log_level = X264_LOG_DEBUG;

	x4->params.b_aud = avctx->flags2 & CODEC_FLAG2_AUD;

	x4->params.i_threads = avctx->thread_count;

	x4->params.b_interlaced = avctx->flags & CODEC_FLAG_INTERLACED_DCT;

	if(avctx->flags & CODEC_FLAG_GLOBAL_HEADER){
	x4->params.b_repeat_headers = 0;
	}

	x4->enc = x264_encoder_open(&x4->params);
	if(!x4->enc)
	return -1;

	avctx->coded_frame = &x4->out_pic;

	if(avctx->flags & CODEC_FLAG_GLOBAL_HEADER){
	x264_nal_t *nal;
	int nnal, i, s = 0;

	x264_encoder_headers(x4->enc, &nal, &nnal);

	/* 5 bytes NAL header + worst case escaping */
	for(i = 0; i < nnal; i++)
	s += 5 + nal[i].i_payload * 4 / 3;

	avctx->extradata = av_malloc(s);
	avctx->extradata_size = encode_nals(avctx->extradata, s, nal, nnal);
	}

	return 0;
	}

	AVCodec libx264_encoder = {
	.name = "libx264",
	.type = CODEC_TYPE_VIDEO,
	.id = CODEC_ID_H264,
	.priv_data_size = sizeof(X264Context),
	.init = X264_init,
	.encode = X264_frame,
	.close = X264_close,
	.capabilities = CODEC_CAP_DELAY,
	.pix_fmts = (enum PixelFormat[]) { PIX_FMT_YUV420P, PIX_FMT_NONE },
	.long_name = NULL_IF_CONFIG_SMALL("libx264 H.264 / AVC / MPEG-4 AVC / MPEG-4 part 10"),
	};