ffmpeg / libavcodec / x264.c @ 5509bffa
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1 | 6662ec29 | Michael Niedermayer | /*
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2 | * H.264 encoding using the x264 library
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3 | f9791751 | Måns Rullgård | * Copyright (C) 2005 Mans Rullgard <mru@inprovide.com>
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4 | 6662ec29 | Michael Niedermayer | *
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5 | * This library is free software; you can redistribute it and/or
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6 | * modify it under the terms of the GNU Lesser General Public
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7 | * License as published by the Free Software Foundation; either
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8 | * version 2 of the License, or (at your option) any later version.
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9 | *
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10 | * This library is distributed in the hope that it will be useful,
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11 | * but WITHOUT ANY WARRANTY; without even the implied warranty of
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12 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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13 | * Lesser General Public License for more details.
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14 | *
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15 | * You should have received a copy of the GNU Lesser General Public
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16 | * License along with this library; if not, write to the Free Software
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17 | 5509bffa | Diego Biurrun | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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18 | 6662ec29 | Michael Niedermayer | */
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19 | |||
20 | #include "avcodec.h" |
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21 | #include <x264.h> |
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22 | 337afd14 | Michael Niedermayer | #include <math.h> |
23 | 58f7833e | Robert Swain | #include <stdio.h> |
24 | #include <stdlib.h> |
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25 | #include <string.h> |
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26 | 6662ec29 | Michael Niedermayer | |
27 | typedef struct X264Context { |
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28 | x264_param_t params; |
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29 | x264_t *enc; |
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30 | x264_picture_t pic; |
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31 | AVFrame out_pic; |
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32 | } X264Context; |
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33 | |||
34 | static void |
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35 | X264_log(void *p, int level, const char *fmt, va_list args) |
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36 | { |
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37 | static const int level_map[] = { |
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38 | bb270c08 | Diego Biurrun | [X264_LOG_ERROR] = AV_LOG_ERROR, |
39 | [X264_LOG_WARNING] = AV_LOG_ERROR, |
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40 | [X264_LOG_INFO] = AV_LOG_INFO, |
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41 | [X264_LOG_DEBUG] = AV_LOG_DEBUG |
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42 | 6662ec29 | Michael Niedermayer | }; |
43 | |||
44 | if(level < 0 || level > X264_LOG_DEBUG) |
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45 | bb270c08 | Diego Biurrun | return;
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46 | 6662ec29 | Michael Niedermayer | |
47 | av_vlog(p, level_map[level], fmt, args); |
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48 | } |
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49 | |||
50 | |||
51 | static int |
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52 | f40487c2 | Måns Rullgård | encode_nals(uint8_t *buf, int size, x264_nal_t *nals, int nnal) |
53 | 6662ec29 | Michael Niedermayer | { |
54 | f40487c2 | Måns Rullgård | uint8_t *p = buf; |
55 | 6662ec29 | Michael Niedermayer | int i;
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56 | |||
57 | for(i = 0; i < nnal; i++){ |
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58 | bb270c08 | Diego Biurrun | int s = x264_nal_encode(p, &size, 1, nals + i); |
59 | if(s < 0) |
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60 | return -1; |
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61 | p += s; |
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62 | 6662ec29 | Michael Niedermayer | } |
63 | |||
64 | return p - buf;
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65 | } |
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66 | |||
67 | extern int |
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68 | X264_frame(AVCodecContext *ctx, uint8_t *buf, int bufsize, void *data) |
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69 | { |
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70 | X264Context *x4 = ctx->priv_data; |
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71 | AVFrame *frame = data; |
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72 | x264_nal_t *nal; |
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73 | int nnal, i;
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74 | x264_picture_t pic_out; |
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75 | |||
76 | x4->pic.img.i_csp = X264_CSP_I420; |
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77 | x4->pic.img.i_plane = 3;
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78 | |||
79 | for(i = 0; i < 3; i++){ |
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80 | bb270c08 | Diego Biurrun | x4->pic.img.plane[i] = frame->data[i]; |
81 | x4->pic.img.i_stride[i] = frame->linesize[i]; |
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82 | 6662ec29 | Michael Niedermayer | } |
83 | |||
84 | x4->pic.i_pts = frame->pts; |
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85 | x4->pic.i_type = X264_TYPE_AUTO; |
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86 | |||
87 | if(x264_encoder_encode(x4->enc, &nal, &nnal, &x4->pic, &pic_out))
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88 | bb270c08 | Diego Biurrun | return -1; |
89 | 6662ec29 | Michael Niedermayer | |
90 | bufsize = encode_nals(buf, bufsize, nal, nnal); |
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91 | if(bufsize < 0) |
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92 | bb270c08 | Diego Biurrun | return -1; |
93 | 6662ec29 | Michael Niedermayer | |
94 | /* FIXME: dts */
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95 | x4->out_pic.pts = pic_out.i_pts; |
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96 | |||
97 | switch(pic_out.i_type){
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98 | case X264_TYPE_IDR:
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99 | case X264_TYPE_I:
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100 | x4->out_pic.pict_type = FF_I_TYPE; |
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101 | break;
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102 | case X264_TYPE_P:
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103 | x4->out_pic.pict_type = FF_P_TYPE; |
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104 | break;
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105 | case X264_TYPE_B:
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106 | case X264_TYPE_BREF:
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107 | x4->out_pic.pict_type = FF_B_TYPE; |
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108 | break;
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109 | } |
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110 | |||
111 | 68c6d60f | Måns Rullgård | x4->out_pic.key_frame = pic_out.i_type == X264_TYPE_IDR; |
112 | x4->out_pic.quality = (pic_out.i_qpplus1 - 1) * FF_QP2LAMBDA;
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113 | 6662ec29 | Michael Niedermayer | |
114 | return bufsize;
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115 | } |
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116 | |||
117 | static int |
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118 | X264_close(AVCodecContext *avctx) |
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119 | { |
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120 | X264Context *x4 = avctx->priv_data; |
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121 | |||
122 | if(x4->enc)
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123 | bb270c08 | Diego Biurrun | x264_encoder_close(x4->enc); |
124 | 6662ec29 | Michael Niedermayer | |
125 | return 0; |
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126 | } |
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127 | |||
128 | extern int |
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129 | X264_init(AVCodecContext *avctx) |
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130 | { |
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131 | X264Context *x4 = avctx->priv_data; |
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132 | |||
133 | x264_param_default(&x4->params); |
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134 | |||
135 | x4->params.pf_log = X264_log; |
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136 | x4->params.p_log_private = avctx; |
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137 | |||
138 | x4->params.i_keyint_max = avctx->gop_size; |
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139 | x4->params.rc.i_bitrate = avctx->bit_rate / 1000;
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140 | 3f9d3777 | Måns Rullgård | x4->params.rc.i_vbv_buffer_size = avctx->rc_buffer_size / 1000;
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141 | 18ae520b | Dario Andrade | x4->params.rc.i_vbv_max_bitrate = avctx->rc_max_rate / 1000;
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142 | 58f7833e | Robert Swain | x4->params.rc.b_stat_write = (avctx->flags & CODEC_FLAG_PASS1); |
143 | if(avctx->flags & CODEC_FLAG_PASS2) x4->params.rc.b_stat_read = 1; |
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144 | else{
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145 | if(avctx->crf) x4->params.rc.i_rf_constant = avctx->crf;
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146 | else if(avctx->cqp > -1) x4->params.rc.i_qp_constant = avctx->cqp; |
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147 | } |
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148 | |||
149 | // if neither crf nor cqp modes are selected we have to enable the RC
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150 | // we do it this way because we cannot check if the bitrate has been set
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151 | if(!(avctx->crf || (avctx->cqp > -1))) x4->params.rc.b_cbr = 1; |
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152 | |||
153 | d4e87f79 | Måns Rullgård | x4->params.i_bframe = avctx->max_b_frames; |
154 | x4->params.b_cabac = avctx->coder_type == FF_CODER_TYPE_AC; |
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155 | 58f7833e | Robert Swain | x4->params.b_bframe_adaptive = avctx->b_frame_strategy; |
156 | x4->params.i_bframe_bias = avctx->bframebias; |
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157 | x4->params.b_bframe_pyramid = (avctx->flags2 & CODEC_FLAG2_BPYRAMID); |
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158 | |||
159 | x4->params.i_keyint_min = avctx->keyint_min; |
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160 | if(x4->params.i_keyint_min > x4->params.i_keyint_max)
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161 | x4->params.i_keyint_min = x4->params.i_keyint_max; |
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162 | |||
163 | x4->params.i_scenecut_threshold = avctx->scenechange_threshold; |
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164 | |||
165 | x4->params.b_deblocking_filter = (avctx->flags & CODEC_FLAG_LOOP_FILTER); |
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166 | x4->params.i_deblocking_filter_alphac0 = avctx->deblockalpha; |
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167 | x4->params.i_deblocking_filter_beta = avctx->deblockbeta; |
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168 | f9791751 | Måns Rullgård | |
169 | 6662ec29 | Michael Niedermayer | x4->params.rc.i_qp_min = avctx->qmin; |
170 | x4->params.rc.i_qp_max = avctx->qmax; |
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171 | x4->params.rc.i_qp_step = avctx->max_qdiff; |
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172 | |||
173 | 18ae520b | Dario Andrade | x4->params.rc.f_qcompress = avctx->qcompress; /* 0.0 => cbr, 1.0 => constant qp */
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174 | x4->params.rc.f_qblur = avctx->qblur; /* temporally blur quants */
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175 | 58f7833e | Robert Swain | x4->params.rc.f_complexity_blur = avctx->complexityblur; |
176 | 18ae520b | Dario Andrade | |
177 | 58f7833e | Robert Swain | x4->params.i_frame_reference = avctx->refs; |
178 | 68c6d60f | Måns Rullgård | |
179 | 6662ec29 | Michael Niedermayer | x4->params.i_width = avctx->width; |
180 | x4->params.i_height = avctx->height; |
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181 | x4->params.vui.i_sar_width = avctx->sample_aspect_ratio.num; |
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182 | x4->params.vui.i_sar_height = avctx->sample_aspect_ratio.den; |
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183 | c0df9d75 | Michael Niedermayer | x4->params.i_fps_num = avctx->time_base.den; |
184 | x4->params.i_fps_den = avctx->time_base.num; |
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185 | 6662ec29 | Michael Niedermayer | |
186 | 58f7833e | Robert Swain | x4->params.analyse.inter = 0;
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187 | if(avctx->partitions){
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188 | if(avctx->partitions & X264_PART_I4X4)
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189 | x4->params.analyse.inter |= X264_ANALYSE_I4x4; |
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190 | if(avctx->partitions & X264_PART_I8X8)
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191 | x4->params.analyse.inter |= X264_ANALYSE_I8x8; |
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192 | if(avctx->partitions & X264_PART_P8X8)
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193 | x4->params.analyse.inter |= X264_ANALYSE_PSUB16x16; |
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194 | if(avctx->partitions & X264_PART_P4X4)
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195 | x4->params.analyse.inter |= X264_ANALYSE_PSUB8x8; |
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196 | if(avctx->partitions & X264_PART_B8X8)
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197 | x4->params.analyse.inter |= X264_ANALYSE_BSUB16x16; |
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198 | } |
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199 | |||
200 | x4->params.analyse.i_direct_mv_pred = avctx->directpred; |
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201 | |||
202 | x4->params.analyse.b_weighted_bipred = (avctx->flags2 & CODEC_FLAG2_WPRED); |
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203 | |||
204 | if(avctx->me_method == ME_EPZS)
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205 | x4->params.analyse.i_me_method = X264_ME_DIA; |
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206 | else if(avctx->me_method == ME_HEX) |
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207 | x4->params.analyse.i_me_method = X264_ME_HEX; |
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208 | else if(avctx->me_method == ME_UMH) |
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209 | x4->params.analyse.i_me_method = X264_ME_UMH; |
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210 | else if(avctx->me_method == ME_FULL) |
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211 | x4->params.analyse.i_me_method = X264_ME_ESA; |
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212 | else x4->params.analyse.i_me_method = X264_ME_HEX;
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213 | |||
214 | x4->params.analyse.i_me_range = avctx->me_range; |
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215 | x4->params.analyse.i_subpel_refine = avctx->me_subpel_quality; |
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216 | |||
217 | x4->params.analyse.b_bframe_rdo = (avctx->flags2 & CODEC_FLAG2_BRDO); |
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218 | x4->params.analyse.b_mixed_references = |
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219 | (avctx->flags2 & CODEC_FLAG2_MIXED_REFS); |
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220 | x4->params.analyse.b_chroma_me = (avctx->me_cmp & FF_CMP_CHROMA); |
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221 | x4->params.analyse.b_transform_8x8 = (avctx->flags2 & CODEC_FLAG2_8X8DCT); |
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222 | x4->params.analyse.b_fast_pskip = (avctx->flags2 & CODEC_FLAG2_FASTPSKIP); |
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223 | |||
224 | x4->params.analyse.i_trellis = avctx->trellis; |
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225 | |||
226 | if(avctx->level > 0) x4->params.i_level_idc = avctx->level; |
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227 | |||
228 | x4->params.rc.f_rate_tolerance = |
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229 | (float)avctx->bit_rate_tolerance/avctx->bit_rate;
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230 | |||
231 | if((avctx->rc_buffer_size != 0) && |
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232 | (avctx->rc_initial_buffer_occupancy <= avctx->rc_buffer_size)){ |
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233 | x4->params.rc.f_vbv_buffer_init = |
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234 | (float)avctx->rc_initial_buffer_occupancy/avctx->rc_buffer_size;
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235 | } |
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236 | else x4->params.rc.f_vbv_buffer_init = 0.9; |
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237 | |||
238 | x4->params.rc.f_ip_factor = 1/fabs(avctx->i_quant_factor);
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239 | x4->params.rc.f_pb_factor = avctx->b_quant_factor; |
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240 | x4->params.analyse.i_chroma_qp_offset = avctx->chromaoffset; |
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241 | x4->params.rc.psz_rc_eq = avctx->rc_eq; |
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242 | |||
243 | x4->params.analyse.b_psnr = (avctx->flags & CODEC_FLAG_PSNR); |
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244 | x4->params.i_log_level = X264_LOG_DEBUG; |
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245 | |||
246 | x4->params.b_aud = (avctx->flags2 & CODEC_FLAG2_AUD); |
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247 | |||
248 | 568d4b81 | Måns Rullgård | x4->params.i_threads = avctx->thread_count; |
249 | |||
250 | 6662ec29 | Michael Niedermayer | x4->enc = x264_encoder_open(&x4->params); |
251 | if(!x4->enc)
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252 | return -1; |
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253 | |||
254 | avctx->coded_frame = &x4->out_pic; |
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255 | |||
256 | return 0; |
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257 | } |
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258 | |||
259 | AVCodec x264_encoder = { |
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260 | .name = "h264",
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261 | .type = CODEC_TYPE_VIDEO, |
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262 | .id = CODEC_ID_H264, |
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263 | .priv_data_size = sizeof(X264Context),
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264 | .init = X264_init, |
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265 | .encode = X264_frame, |
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266 | .close = X264_close, |
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267 | .pix_fmts = (enum PixelFormat[]) { PIX_FMT_YUV420P, -1 } |
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268 | }; |