1 /*****************************************************************************
2 * x264.c: h264 video encoder
3 *****************************************************************************
4 * Copyright (C) 2004 VideoLAN
7 * Authors: Laurent Aimar <fenrir@via.ecp.fr>
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License as published by
11 * the Free Software Foundation; either version 2 of the License, or
12 * (at your option) any later version.
14 * This program is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 * GNU General Public License for more details.
19 * You should have received a copy of the GNU General Public License
20 * along with this program; if not, write to the Free Software
21 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111, USA.
22 *****************************************************************************/
24 /*****************************************************************************
26 *****************************************************************************/
30 #include <vlc/decoder.h>
34 #define SOUT_CFG_PREFIX "sout-x264-"
36 /*****************************************************************************
38 *****************************************************************************/
39 static int Open ( vlc_object_t * );
40 static void Close( vlc_object_t * );
42 #define QP_TEXT N_("Quantizer parameter")
43 #define QP_LONGTEXT N_( \
44 "This selects the quantizer to use (1 to 51). Lower values result in " \
45 "better fidelity, but higher bitrates. 26 is a good default value." )
47 #define QPMIN_TEXT N_("Minimum quantizer parameter")
48 #define QPMIN_LONGTEXT N_( "Minimum quantizer, 15/35 seems to be a useful " \
51 #define QPMAX_TEXT N_("Maximum quantizer parameter")
52 #define QPMAX_LONGTEXT N_( "Maximum quantizer parameter." )
54 #define CABAC_TEXT N_("Enable CABAC")
55 #define CABAC_LONGTEXT N_( "Enable CABAC (Context-Adaptive Binary Arithmetic "\
56 "Coding). Slightly slows down encoding and decoding, but should save " \
59 #define LOOPF_TEXT N_("Enable loop filter")
60 #define LOOPF_LONGTEXT N_( "Use deblocking loop filter (increases quality).")
62 #define ANALYSE_TEXT N_("Analyse mode")
63 #define ANALYSE_LONGTEXT N_( "This selects the analysing mode.")
65 #define KEYINT_TEXT N_("Sets maximum interval between IDR-frames")
66 #define KEYINT_LONGTEXT N_( "Larger values save bits, thus improve quality "\
67 "for a given bitrate, at the cost of seeking precision." )
69 #define KEYINT_MIN_TEXT N_("Sets minimum interval between IDR-frames")
70 #define KEYINT_MIN_LONGTEXT N_("In H.264, I-Frames do not necessarily bound " \
71 "a closed GOP because it is allowable for a P-frame to be predicted from "\
72 "more frames than just the one frame before it (also see frameref). " \
73 "Therefore, I-frames are not necessarily seekable. " \
74 "IDR-Frames restrict subsequent P-frames from referring to any frame " \
75 "prior to the IDR-Frame. \n" \
76 "If scenecuts appear within this interval, they are still encoded as " \
77 "I-frames, but do not start a new GOP. Default value is keyint * 0.4." )
79 #define BFRAMES_TEXT N_("B frames")
80 #define BFRAMES_LONGTEXT N_( "Number of consecutive B-Frames between I and " \
83 #define FRAMEREF_TEXT N_("Number of previous frames used as predictors.")
84 #define FRAMEREF_LONGTEXT N_( "This is effective in Anime, but seems to " \
85 "make little difference in live-action source material. Some decoders " \
86 "are unable to deal with large frameref values." )
88 #define SCENE_TEXT N_("Scene-cut detection.")
89 #define SCENE_LONGTEXT N_( "Controls how aggressively to insert extra " \
90 "I-frames. With small values of scenecut, the codec often has to force " \
91 "an I-frame when it would exceed keyint. " \
92 "Good values of scenecut may find a better location for the I-frame. " \
93 "Large values use more I-frames than necessary, thus wasting bits. " \
94 "-1 disables scene-cut detection, so I-frames are be inserted only every "\
95 "other keyint frames, which probably leads to ugly encoding artifacts." )
97 static char *enc_analyse_list[] =
98 { "", "all", "normal", "fast", "none" };
99 static char *enc_analyse_list_text[] =
100 { N_("default"), N_("all"), N_("normal"), N_("fast"), N_("none") };
103 set_description( _("h264 video encoder using x264 library"));
104 set_capability( "encoder", 200 );
105 set_callbacks( Open, Close );
106 set_category( CAT_INPUT );
107 set_subcategory( SUBCAT_INPUT_VCODEC );
109 add_integer( SOUT_CFG_PREFIX "qp", 0, NULL, QP_TEXT, QP_LONGTEXT,
111 change_integer_range( 0, 51 );
112 add_integer( SOUT_CFG_PREFIX "qp-min", 10, NULL, QPMIN_TEXT,
113 QPMIN_LONGTEXT, VLC_FALSE );
114 change_integer_range( 0, 51 );
115 add_integer( SOUT_CFG_PREFIX "qp-max", 51, NULL, QPMAX_TEXT,
116 QPMAX_LONGTEXT, VLC_FALSE );
117 change_integer_range( 0, 51 );
119 add_bool( SOUT_CFG_PREFIX "cabac", 1, NULL, CABAC_TEXT, CABAC_LONGTEXT,
122 add_bool( SOUT_CFG_PREFIX "loopfilter", 1, NULL, LOOPF_TEXT,
123 LOOPF_LONGTEXT, VLC_FALSE );
125 add_string( SOUT_CFG_PREFIX "analyse", "", NULL, ANALYSE_TEXT,
126 ANALYSE_LONGTEXT, VLC_FALSE );
127 change_string_list( enc_analyse_list, enc_analyse_list_text, 0 );
129 add_integer( SOUT_CFG_PREFIX "keyint", 250, NULL, KEYINT_TEXT,
130 KEYINT_LONGTEXT, VLC_FALSE );
132 add_integer( SOUT_CFG_PREFIX "keyint-min", 0, NULL, KEYINT_MIN_TEXT,
133 KEYINT_MIN_LONGTEXT, VLC_FALSE );
135 add_integer( SOUT_CFG_PREFIX "bframes", 0, NULL, BFRAMES_TEXT,
136 BFRAMES_LONGTEXT, VLC_FALSE );
137 change_integer_range( 0, 16 );
139 add_integer( SOUT_CFG_PREFIX "frameref", 1, NULL, FRAMEREF_TEXT,
140 FRAMEREF_LONGTEXT, VLC_FALSE );
141 change_integer_range( 1, 15 );
143 add_integer( SOUT_CFG_PREFIX "scenecut", 40, NULL, SCENE_TEXT,
144 SCENE_LONGTEXT, VLC_FALSE );
145 change_integer_range( -1, 100 );
149 /*****************************************************************************
151 *****************************************************************************/
152 static const char *ppsz_sout_options[] = {
153 "qp", "qp-min", "qp-max", "cabac", "loopfilter", "analyse",
154 "keyint", "keyint-min", "bframes", "frameref", "scenecut", NULL
157 static block_t *Encode( encoder_t *, picture_t * );
168 /*****************************************************************************
169 * Open: probe the encoder
170 *****************************************************************************/
171 static int Open ( vlc_object_t *p_this )
173 encoder_t *p_enc = (encoder_t *)p_this;
174 encoder_sys_t *p_sys;
176 int i_qmin = 0, i_qmax = 0;
178 if( p_enc->fmt_out.i_codec != VLC_FOURCC( 'h', '2', '6', '4' ) &&
184 if( p_enc->fmt_in.video.i_width % 16 != 0 ||
185 p_enc->fmt_in.video.i_height % 16!= 0 )
187 msg_Warn( p_enc, "invalid size %ix%i",
188 p_enc->fmt_in.video.i_width,
189 p_enc->fmt_in.video.i_height );
193 sout_CfgParse( p_enc, SOUT_CFG_PREFIX, ppsz_sout_options, p_enc->p_cfg );
195 p_enc->fmt_out.i_codec = VLC_FOURCC( 'h', '2', '6', '4' );
196 p_enc->fmt_in.i_codec = VLC_FOURCC('I','4','2','0');
198 p_enc->pf_encode_video = Encode;
199 p_enc->pf_encode_audio = NULL;
200 p_enc->p_sys = p_sys = malloc( sizeof( encoder_sys_t ) );
202 x264_param_default( &p_sys->param );
203 p_sys->param.i_width = p_enc->fmt_in.video.i_width;
204 p_sys->param.i_height = p_enc->fmt_in.video.i_height;
206 var_Get( p_enc, SOUT_CFG_PREFIX "qp-min", &val );
207 if( val.i_int >= 1 && val.i_int <= 51 ) i_qmin = val.i_int;
208 var_Get( p_enc, SOUT_CFG_PREFIX "qp-max", &val );
209 if( val.i_int >= 1 && val.i_int <= 51 ) i_qmax = val.i_int;
211 var_Get( p_enc, SOUT_CFG_PREFIX "qp", &val );
212 if( val.i_int >= 1 && val.i_int <= 51 )
214 if( i_qmin > val.i_int ) i_qmin = val.i_int;
215 if( i_qmax < val.i_int ) i_qmax = val.i_int;
217 #if X264_BUILD >= 0x000a
218 p_sys->param.rc.i_qp_constant = val.i_int;
219 p_sys->param.rc.i_qp_min = i_qmin;
220 p_sys->param.rc.i_qp_max = i_qmax;
222 p_sys->param.i_qp_constant = val.i_int;
227 /* No QP -> constant bitrate */
228 #if X264_BUILD >= 0x000a
229 p_sys->param.rc.b_cbr = 1;
230 p_sys->param.rc.i_bitrate = p_enc->fmt_out.i_bitrate / 1000;
231 p_sys->param.rc.i_rc_buffer_size = p_sys->param.rc.i_bitrate;
232 p_sys->param.rc.i_rc_init_buffer = p_sys->param.rc.i_bitrate / 4;
236 var_Get( p_enc, SOUT_CFG_PREFIX "cabac", &val );
237 p_sys->param.b_cabac = val.b_bool;
239 var_Get( p_enc, SOUT_CFG_PREFIX "loopfilter", &val );
240 p_sys->param.b_deblocking_filter = val.b_bool;
242 var_Get( p_enc, SOUT_CFG_PREFIX "keyint", &val );
243 #if X264_BUILD >= 0x000e
244 if( val.i_int > 0 ) p_sys->param.i_keyint_max = val.i_int;
245 if( val.i_int > 0 ) p_sys->param.i_keyint_min = val.i_int * 0.4;
247 if( val.i_int > 0 ) p_sys->param.i_iframe = val.i_int;
250 var_Get( p_enc, SOUT_CFG_PREFIX "keyint-min", &val );
251 #if X264_BUILD >= 0x000e
252 if( val.i_int > 0 ) p_sys->param.i_keyint_min = val.i_int;
254 if( val.i_int > 0 ) p_sys->param.i_idrframe = val.i_int;
257 var_Get( p_enc, SOUT_CFG_PREFIX "bframes", &val );
258 if( val.i_int >= 0 && val.i_int <= 16 ) p_sys->param.i_bframe = val.i_int;
260 var_Get( p_enc, SOUT_CFG_PREFIX "frameref", &val );
261 if( val.i_int > 0 && val.i_int <= 15 )
262 p_sys->param.i_frame_reference = val.i_int;
264 var_Get( p_enc, SOUT_CFG_PREFIX "scenecut", &val );
265 #if X264_BUILD >= 0x000b
266 if( val.i_int >= -1 && val.i_int <= 100 )
267 p_sys->param.i_scenecut_threshold = val.i_int;
270 var_Get( p_enc, SOUT_CFG_PREFIX "analyse", &val );
271 if( !strcmp( val.psz_string, "none" ) )
273 p_sys->param.analyse.inter = 0;
275 else if( !strcmp( val.psz_string, "fast" ) )
277 p_sys->param.analyse.inter = X264_ANALYSE_I4x4;
279 else if( !strcmp( val.psz_string, "normal" ) )
281 p_sys->param.analyse.inter =
282 X264_ANALYSE_I4x4 | X264_ANALYSE_PSUB16x16;
284 else if( !strcmp( val.psz_string, "all" ) )
286 p_sys->param.analyse.inter =
287 X264_ANALYSE_I4x4 | X264_ANALYSE_PSUB16x16 | X264_ANALYSE_PSUB8x8;
290 if( p_enc->fmt_in.video.i_aspect > 0 )
292 int64_t i_num, i_den;
293 int i_dst_num, i_dst_den;
295 i_num = p_enc->fmt_in.video.i_aspect *
296 (int64_t)p_enc->fmt_in.video.i_height;
297 i_den = VOUT_ASPECT_FACTOR * p_enc->fmt_in.video.i_width;
298 vlc_reduce( &i_dst_num, &i_dst_den, i_num, i_den, 0 );
300 p_sys->param.vui.i_sar_width = i_dst_num;
301 p_sys->param.vui.i_sar_height = i_dst_den;
303 if( p_enc->fmt_in.video.i_frame_rate_base > 0 )
305 p_sys->param.i_fps_num = p_enc->fmt_in.video.i_frame_rate;
306 p_sys->param.i_fps_den = p_enc->fmt_in.video.i_frame_rate_base;
308 if( !(p_enc->p_libvlc->i_cpu & CPU_CAPABILITY_MMX) )
310 p_sys->param.cpu &= ~X264_CPU_MMX;
312 if( !(p_enc->p_libvlc->i_cpu & CPU_CAPABILITY_MMXEXT) )
314 p_sys->param.cpu &= ~X264_CPU_MMXEXT;
316 if( !(p_enc->p_libvlc->i_cpu & CPU_CAPABILITY_SSE) )
318 p_sys->param.cpu &= ~X264_CPU_SSE;
320 if( !(p_enc->p_libvlc->i_cpu & CPU_CAPABILITY_SSE2) )
322 p_sys->param.cpu &= ~X264_CPU_SSE2;
325 /* Open the encoder */
326 p_sys->h = x264_encoder_open( &p_sys->param );
329 p_sys->i_buffer = 4 * p_enc->fmt_in.video.i_width *
330 p_enc->fmt_in.video.i_height + 1000;
331 p_sys->p_buffer = malloc( p_sys->i_buffer );
333 /* get the globals headers */
334 p_enc->fmt_out.i_extra = 0;
335 p_enc->fmt_out.p_extra = NULL;
338 x264_encoder_headers( p_sys->h, &nal, &i_nal );
339 for( i = 0; i < i_nal; i++ )
341 int i_size = p_sys->i_buffer;
343 x264_nal_encode( p_sys->p_buffer, &i_size, 1, &nal[i] );
345 p_enc->fmt_out.p_extra = realloc( p_enc->fmt_out.p_extra, p_enc->fmt_out.i_extra + i_size );
347 memcpy( p_enc->fmt_out.p_extra + p_enc->fmt_out.i_extra,
348 p_sys->p_buffer, i_size );
350 p_enc->fmt_out.i_extra += i_size;
357 /****************************************************************************
359 ****************************************************************************/
360 static block_t *Encode( encoder_t *p_enc, picture_t *p_pict )
362 encoder_sys_t *p_sys = p_enc->p_sys;
369 memset( &pic, 0, sizeof( x264_picture_t ) );
370 pic.img.i_csp = X264_CSP_I420;
371 pic.img.i_plane = p_pict->i_planes;
372 for( i = 0; i < p_pict->i_planes; i++ )
374 pic.img.plane[i] = p_pict->p[i].p_pixels;
375 pic.img.i_stride[i] = p_pict->p[i].i_pitch;
378 #if X264_BUILD >= 0x0013
379 x264_encoder_encode( p_sys->h, &nal, &i_nal, &pic, &pic );
381 x264_encoder_encode( p_sys->h, &nal, &i_nal, &pic );
383 for( i = 0, i_out = 0; i < i_nal; i++ )
385 int i_size = p_sys->i_buffer - i_out;
386 x264_nal_encode( p_sys->p_buffer + i_out, &i_size, 1, &nal[i] );
391 p_block = block_New( p_enc, i_out );
392 p_block->i_dts = p_pict->date;
393 p_block->i_pts = p_pict->date;
394 memcpy( p_block->p_buffer, p_sys->p_buffer, i_out );
396 if( pic.i_type == X264_TYPE_IDR || pic.i_type == X264_TYPE_I )
397 p_block->i_flags |= BLOCK_FLAG_TYPE_I;
398 else if( pic.i_type == X264_TYPE_P )
399 p_block->i_flags |= BLOCK_FLAG_TYPE_P;
400 else if( pic.i_type == X264_TYPE_B )
401 p_block->i_flags |= BLOCK_FLAG_TYPE_B;
406 /*****************************************************************************
407 * CloseEncoder: ffmpeg encoder destruction
408 *****************************************************************************/
409 static void Close( vlc_object_t *p_this )
411 encoder_t *p_enc = (encoder_t *)p_this;
412 encoder_sys_t *p_sys = p_enc->p_sys;
414 x264_encoder_close( p_sys->h );
415 free( p_sys->p_buffer );