x264.c
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- /*****************************************************************************
- * x264.c: h264 video encoder
- *****************************************************************************
- * Copyright (C) 2004 VideoLAN
- * $Id: x264.c 9280 2004-11-11 12:31:27Z zorglub $
- *
- * Authors: Laurent Aimar <fenrir@via.ecp.fr>
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program 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 General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111, USA.
- *****************************************************************************/
- /*****************************************************************************
- * Preamble
- *****************************************************************************/
- #include <vlc/vlc.h>
- #include <vlc/vout.h>
- #include <vlc/sout.h>
- #include <vlc/decoder.h>
- #include <x264.h>
- #define SOUT_CFG_PREFIX "sout-x264-"
- /*****************************************************************************
- * Module descriptor
- *****************************************************************************/
- static int Open ( vlc_object_t * );
- static void Close( vlc_object_t * );
- #define QP_TEXT N_("Quantizer parameter")
- #define QP_LONGTEXT N_(
- "This selects the quantizer to use (1 to 51). Lower values result in "
- "better fidelity, but higher bitrates. 26 is a good default value." )
- #define QPMIN_TEXT N_("Minimum quantizer parameter")
- #define QPMIN_LONGTEXT N_( "Minimum quantizer, 15/35 seems to be a useful "
- "range." )
- #define QPMAX_TEXT N_("Maximum quantizer parameter")
- #define QPMAX_LONGTEXT N_( "Maximum quantizer parameter." )
- #define CABAC_TEXT N_("Enable CABAC")
- #define CABAC_LONGTEXT N_( "Enable CABAC (Context-Adaptive Binary Arithmetic "
- "Coding). Slightly slows down encoding and decoding, but should save "
- "10-15% bitrate." )
- #define LOOPF_TEXT N_("Enable loop filter")
- #define LOOPF_LONGTEXT N_( "Use deblocking loop filter (increases quality).")
- #define ANALYSE_TEXT N_("Analyse mode")
- #define ANALYSE_LONGTEXT N_( "This selects the analysing mode.")
- #define KEYINT_TEXT N_("Sets maximum interval between I frames")
- #define KEYINT_LONGTEXT N_( "Larger values save bits, thus improve quality "
- "for a given bitrate, at the cost of seeking precision." )
- #define IDRINT_TEXT N_("IDR frames")
- #define IDRINT_LONGTEXT N_("In H.264, I-Frames do not necessarily bound a "
- "closed GOP because it is allowable for a P-frame to be predicted from "
- "more frames than just the one frame before it (also see frameref). "
- "Therefore, I-frames are not necessarily seekable. "
- "IDR-Frames restrict subsequent P-frames from referring to any frame "
- "prior to the IDR-Frame." )
- #define BFRAMES_TEXT N_("B frames")
- #define BFRAMES_LONGTEXT N_( "Number of consecutive B-Frames between I and "
- "P-frames." )
- #define FRAMEREF_TEXT N_("Number of previous frames used as predictors.")
- #define FRAMEREF_LONGTEXT N_( "This is effective in Anime, but seems to "
- "make little difference in live-action source material. Some decoders "
- "are unable to deal with large frameref values." )
- #define SCENE_TEXT N_("Scene-cut detection.")
- #define SCENE_LONGTEXT N_( "Controls how aggressively to insert extra "
- "I-frames. With small values of scenecut, the codec often has to force "
- "an I-frame when it would exceed keyint. "
- "Good values of scenecut may find a better location for the I-frame. "
- "Large values use more I-frames than necessary, thus wasting bits. "
- "-1 disables scene-cut detection, so I-frames are be inserted only every "
- "other keyint frames, which probably leads to ugly encoding artifacts." )
- static char *enc_analyse_list[] =
- { "", "all", "normal", "fast", "none" };
- static char *enc_analyse_list_text[] =
- { N_("default"), N_("all"), N_("normal"), N_("fast"), N_("none") };
- vlc_module_begin();
- set_description( _("h264 video encoder using x264 library"));
- set_capability( "encoder", 200 );
- set_callbacks( Open, Close );
- add_integer( SOUT_CFG_PREFIX "qp", 0, NULL, QP_TEXT, QP_LONGTEXT,
- VLC_FALSE );
- change_integer_range( 0, 51 );
- add_integer( SOUT_CFG_PREFIX "qp-min", 10, NULL, QPMIN_TEXT,
- QPMIN_LONGTEXT, VLC_FALSE );
- change_integer_range( 0, 51 );
- add_integer( SOUT_CFG_PREFIX "qp-max", 51, NULL, QPMAX_TEXT,
- QPMAX_LONGTEXT, VLC_FALSE );
- change_integer_range( 0, 51 );
- add_bool( SOUT_CFG_PREFIX "cabac", 1, NULL, CABAC_TEXT, CABAC_LONGTEXT,
- VLC_FALSE );
- add_bool( SOUT_CFG_PREFIX "loopfilter", 1, NULL, LOOPF_TEXT,
- LOOPF_LONGTEXT, VLC_FALSE );
- add_string( SOUT_CFG_PREFIX "analyse", "", NULL, ANALYSE_TEXT,
- ANALYSE_LONGTEXT, VLC_FALSE );
- change_string_list( enc_analyse_list, enc_analyse_list_text, 0 );
- add_integer( SOUT_CFG_PREFIX "keyint", 250, NULL, KEYINT_TEXT,
- KEYINT_LONGTEXT, VLC_FALSE );
- add_integer( SOUT_CFG_PREFIX "idrint", 2, NULL, IDRINT_TEXT,
- IDRINT_LONGTEXT, VLC_FALSE );
- add_integer( SOUT_CFG_PREFIX "bframes", 0, NULL, BFRAMES_TEXT,
- BFRAMES_LONGTEXT, VLC_FALSE );
- change_integer_range( 0, 16 );
- add_integer( SOUT_CFG_PREFIX "frameref", 1, NULL, FRAMEREF_TEXT,
- FRAMEREF_LONGTEXT, VLC_FALSE );
- change_integer_range( 1, 15 );
- add_integer( SOUT_CFG_PREFIX "scenecut", 40, NULL, SCENE_TEXT,
- SCENE_LONGTEXT, VLC_FALSE );
- change_integer_range( -1, 100 );
- vlc_module_end();
- /*****************************************************************************
- * Local prototypes
- *****************************************************************************/
- static const char *ppsz_sout_options[] = {
- "qp", "qp-min", "qp-max", "cabac", "loopfilter", "analyse",
- "keyint", "idrint", "bframes", "frameref", "scenecut", NULL
- };
- static block_t *Encode( encoder_t *, picture_t * );
- struct encoder_sys_t
- {
- x264_t *h;
- x264_param_t param;
- int i_buffer;
- uint8_t *p_buffer;
- };
- /*****************************************************************************
- * Open: probe the encoder
- *****************************************************************************/
- static int Open ( vlc_object_t *p_this )
- {
- encoder_t *p_enc = (encoder_t *)p_this;
- encoder_sys_t *p_sys;
- vlc_value_t val;
- int i_qmin = 0, i_qmax = 0;
- if( p_enc->fmt_out.i_codec != VLC_FOURCC( 'h', '2', '6', '4' ) &&
- !p_enc->b_force )
- {
- return VLC_EGENERIC;
- }
- if( p_enc->fmt_in.video.i_width % 16 != 0 ||
- p_enc->fmt_in.video.i_height % 16!= 0 )
- {
- msg_Warn( p_enc, "invalid size %ix%i",
- p_enc->fmt_in.video.i_width,
- p_enc->fmt_in.video.i_height );
- return VLC_EGENERIC;
- }
- sout_CfgParse( p_enc, SOUT_CFG_PREFIX, ppsz_sout_options, p_enc->p_cfg );
- p_enc->fmt_out.i_codec = VLC_FOURCC( 'h', '2', '6', '4' );
- p_enc->fmt_in.i_codec = VLC_FOURCC('I','4','2','0');
- p_enc->pf_encode_video = Encode;
- p_enc->pf_encode_audio = NULL;
- p_enc->p_sys = p_sys = malloc( sizeof( encoder_sys_t ) );
- x264_param_default( &p_sys->param );
- p_sys->param.i_width = p_enc->fmt_in.video.i_width;
- p_sys->param.i_height = p_enc->fmt_in.video.i_height;
- var_Get( p_enc, SOUT_CFG_PREFIX "qp-min", &val );
- if( val.i_int >= 1 && val.i_int <= 51 ) i_qmin = val.i_int;
- var_Get( p_enc, SOUT_CFG_PREFIX "qp-max", &val );
- if( val.i_int >= 1 && val.i_int <= 51 ) i_qmax = val.i_int;
- var_Get( p_enc, SOUT_CFG_PREFIX "qp", &val );
- if( val.i_int >= 1 && val.i_int <= 51 )
- {
- if( i_qmin > val.i_int ) i_qmin = val.i_int;
- if( i_qmax < val.i_int ) i_qmax = val.i_int;
- #if X264_BUILD >= 0x000a
- p_sys->param.rc.i_qp_constant = val.i_int;
- p_sys->param.rc.i_qp_min = i_qmin;
- p_sys->param.rc.i_qp_max = i_qmax;
- #else
- p_sys->param.i_qp_constant = val.i_int;
- #endif
- }
- else
- {
- /* No QP -> constant bitrate */
- #if X264_BUILD >= 0x000a
- p_sys->param.rc.b_cbr = 1;
- p_sys->param.rc.i_bitrate = p_enc->fmt_out.i_bitrate / 1000;
- p_sys->param.rc.i_rc_buffer_size = p_sys->param.rc.i_bitrate;
- p_sys->param.rc.i_rc_init_buffer = p_sys->param.rc.i_bitrate / 4;
- #endif
- }
- var_Get( p_enc, SOUT_CFG_PREFIX "cabac", &val );
- p_sys->param.b_cabac = val.b_bool;
- var_Get( p_enc, SOUT_CFG_PREFIX "loopfilter", &val );
- p_sys->param.b_deblocking_filter = val.b_bool;
- var_Get( p_enc, SOUT_CFG_PREFIX "keyint", &val );
- if( val.i_int > 0 ) p_sys->param.i_iframe = val.i_int;
- var_Get( p_enc, SOUT_CFG_PREFIX "idrint", &val );
- if( val.i_int > 0 ) p_sys->param.i_idrframe = val.i_int;
- var_Get( p_enc, SOUT_CFG_PREFIX "bframes", &val );
- if( val.i_int >= 0 && val.i_int <= 16 ) p_sys->param.i_bframe = val.i_int;
- var_Get( p_enc, SOUT_CFG_PREFIX "frameref", &val );
- if( val.i_int > 0 && val.i_int <= 15 )
- p_sys->param.i_frame_reference = val.i_int;
- var_Get( p_enc, SOUT_CFG_PREFIX "scenecut", &val );
- #if X264_BUILD >= 0x000b
- if( val.i_int >= -1 && val.i_int <= 100 )
- p_sys->param.i_scenecut_threshold = val.i_int;
- #endif
- var_Get( p_enc, SOUT_CFG_PREFIX "analyse", &val );
- if( !strcmp( val.psz_string, "none" ) )
- {
- p_sys->param.analyse.inter = 0;
- }
- else if( !strcmp( val.psz_string, "fast" ) )
- {
- p_sys->param.analyse.inter = X264_ANALYSE_I4x4;
- }
- else if( !strcmp( val.psz_string, "normal" ) )
- {
- p_sys->param.analyse.inter =
- X264_ANALYSE_I4x4 | X264_ANALYSE_PSUB16x16;
- }
- else if( !strcmp( val.psz_string, "all" ) )
- {
- p_sys->param.analyse.inter =
- X264_ANALYSE_I4x4 | X264_ANALYSE_PSUB16x16 | X264_ANALYSE_PSUB8x8;
- }
- if( p_enc->fmt_in.video.i_aspect > 0 )
- {
- int64_t i_num, i_den;
- int i_dst_num, i_dst_den;
- i_num = p_enc->fmt_in.video.i_aspect *
- (int64_t)p_enc->fmt_in.video.i_height;
- i_den = VOUT_ASPECT_FACTOR * p_enc->fmt_in.video.i_width;
- vlc_reduce( &i_dst_num, &i_dst_den, i_num, i_den, 0 );
- p_sys->param.vui.i_sar_width = i_dst_num;
- p_sys->param.vui.i_sar_height = i_dst_den;
- }
- if( p_enc->fmt_in.video.i_frame_rate_base > 0 )
- {
- p_sys->param.i_fps_num = p_enc->fmt_in.video.i_frame_rate;
- p_sys->param.i_fps_den = p_enc->fmt_in.video.i_frame_rate_base;
- }
- if( !(p_enc->p_libvlc->i_cpu & CPU_CAPABILITY_MMX) )
- {
- p_sys->param.cpu &= ~X264_CPU_MMX;
- }
- if( !(p_enc->p_libvlc->i_cpu & CPU_CAPABILITY_MMXEXT) )
- {
- p_sys->param.cpu &= ~X264_CPU_MMXEXT;
- }
- if( !(p_enc->p_libvlc->i_cpu & CPU_CAPABILITY_SSE) )
- {
- p_sys->param.cpu &= ~X264_CPU_SSE;
- }
- if( !(p_enc->p_libvlc->i_cpu & CPU_CAPABILITY_SSE2) )
- {
- p_sys->param.cpu &= ~X264_CPU_SSE2;
- }
- /* Open the encoder */
- p_sys->h = x264_encoder_open( &p_sys->param );
- /* alloc mem */
- p_sys->i_buffer = 4 * p_enc->fmt_in.video.i_width *
- p_enc->fmt_in.video.i_height + 1000;
- p_sys->p_buffer = malloc( p_sys->i_buffer );
- /* get the globals headers */
- p_enc->fmt_out.i_extra = 0;
- p_enc->fmt_out.p_extra = NULL;
- #if 0
- x264_encoder_headers( p_sys->h, &nal, &i_nal );
- for( i = 0; i < i_nal; i++ )
- {
- int i_size = p_sys->i_buffer;
- x264_nal_encode( p_sys->p_buffer, &i_size, 1, &nal[i] );
- p_enc->fmt_out.p_extra = realloc( p_enc->fmt_out.p_extra, p_enc->fmt_out.i_extra + i_size );
- memcpy( p_enc->fmt_out.p_extra + p_enc->fmt_out.i_extra,
- p_sys->p_buffer, i_size );
- p_enc->fmt_out.i_extra += i_size;
- }
- #endif
- return VLC_SUCCESS;
- }
- /****************************************************************************
- * Encode:
- ****************************************************************************/
- static block_t *Encode( encoder_t *p_enc, picture_t *p_pict )
- {
- encoder_sys_t *p_sys = p_enc->p_sys;
- x264_picture_t pic;
- int i_nal;
- x264_nal_t *nal;
- block_t *p_block;
- int i_out;
- int i;
- /* init pic */
- memset( &pic, 0, sizeof( x264_picture_t ) );
- pic.img.i_csp = X264_CSP_I420;
- pic.img.i_plane = p_pict->i_planes;
- for( i = 0; i < p_pict->i_planes; i++ )
- {
- pic.img.plane[i] = p_pict->p[i].p_pixels;
- pic.img.i_stride[i] = p_pict->p[i].i_pitch;
- }
- x264_encoder_encode( p_sys->h, &nal, &i_nal, &pic );
- for( i = 0, i_out = 0; i < i_nal; i++ )
- {
- int i_size = p_sys->i_buffer - i_out;
- x264_nal_encode( p_sys->p_buffer + i_out, &i_size, 1, &nal[i] );
- i_out += i_size;
- }
- p_block = block_New( p_enc, i_out );
- p_block->i_dts = p_pict->date;
- p_block->i_pts = p_pict->date;
- memcpy( p_block->p_buffer, p_sys->p_buffer, i_out );
- if( pic.i_type == X264_TYPE_IDR || pic.i_type == X264_TYPE_I )
- p_block->i_flags |= BLOCK_FLAG_TYPE_I;
- else if( pic.i_type == X264_TYPE_P )
- p_block->i_flags |= BLOCK_FLAG_TYPE_P;
- else if( pic.i_type == X264_TYPE_B )
- p_block->i_flags |= BLOCK_FLAG_TYPE_B;
- return p_block;
- }
- /*****************************************************************************
- * CloseEncoder: ffmpeg encoder destruction
- *****************************************************************************/
- static void Close( vlc_object_t *p_this )
- {
- encoder_t *p_enc = (encoder_t *)p_this;
- encoder_sys_t *p_sys = p_enc->p_sys;
- x264_encoder_close( p_sys->h );
- free( p_sys->p_buffer );
- free( p_sys );
- }