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ffmpeg/libavcodec/libx264.c
Jason Garrett-Glaser 76d81909ae Update libx264.c to use new libx264 features 
With b_keyframe instead of IDR for detecting keyframes, ffmpeg should now
support periodic encoding with periodic intra refresh (although there is no
interface option for it yet).
Set the new timebase values for full VFR input support.
Bump configure to check for API version 83.

Originally committed as revision 21317 to svn://svn.ffmpeg.org/ffmpeg/trunk
2010-01-19 04:00:08 +00:00

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/*
* 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;
uint8_t *sei;
int sei_size;
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(AVCodecContext *ctx, uint8_t *buf, int size,
x264_nal_t *nals, int nnal, int skip_sei)
{
X264Context *x4 = ctx->priv_data;
uint8_t *p = buf;
int i;
/* Write the SEI as part of the first frame. */
if (x4->sei_size > 0 && nnal > 0) {
memcpy(p, x4->sei, x4->sei_size);
p += x4->sei_size;
x4->sei_size = 0;
}
for (i = 0; i < nnal; i++){
/* Don't put the SEI in extradata. */
if (skip_sei && nals[i].i_type == NAL_SEI) {
x4->sei_size = nals[i].i_payload;
x4->sei = av_malloc(x4->sei_size);
memcpy(x4->sei, nals[i].p_payload, nals[i].i_payload);
continue;
}
memcpy(p, nals[i].p_payload, nals[i].i_payload);
p += nals[i].i_payload;
}
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) < 0)
return -1;
bufsize = encode_nals(ctx, buf, bufsize, nal, nnal, 0);
if (bufsize < 0)
return -1;
/* FIXME: libx264 now provides DTS, but AVFrame doesn't have a field for it. */
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.b_keyframe;
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);
av_free(x4->sei);
if (x4->enc)
x264_encoder_close(x4->enc);
return 0;
}
static av_cold int X264_init(AVCodecContext *avctx)
{
X264Context *x4 = avctx->priv_data;
x4->sei_size = 0;
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.i_bframe_pyramid = avctx->flags2 & CODEC_FLAG2_BPYRAMID ? X264_B_PYRAMID_NORMAL : X264_B_PYRAMID_NONE;
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 = x4->params.i_timebase_den = avctx->time_base.den;
x4->params.i_fps_den = x4->params.i_timebase_num = 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;
x4->params.analyse.i_weighted_pred = avctx->weighted_p_pred;
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.b_mb_tree = !!(avctx->flags2 & CODEC_FLAG2_MBTREE);
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, s;
s = x264_encoder_headers(x4->enc, &nal, &nnal);
avctx->extradata = av_malloc(s);
avctx->extradata_size = encode_nals(avctx, avctx->extradata, s, nal, nnal, 1);
}
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 = (const 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"),
};
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