1 /*****************************************************************************
2 * theora.c: theora decoder module making use of libtheora.
3 *****************************************************************************
4 * Copyright (C) 1999-2001 the VideoLAN team
7 * Authors: Gildas Bazin <gbazin@videolan.org>
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., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
22 *****************************************************************************/
24 /*****************************************************************************
26 *****************************************************************************/
31 #include <vlc_common.h>
32 #include <vlc_plugin.h>
33 #include <vlc_codec.h>
35 #include <vlc_input.h>
38 #include <theora/theora.h>
40 /*****************************************************************************
41 * decoder_sys_t : theora decoder descriptor
42 *****************************************************************************/
56 theora_info ti; /* theora bitstream settings */
57 theora_comment tc; /* theora comment header */
58 theora_state td; /* theora bitstream user comments */
63 bool b_decoded_first_keyframe;
71 /*****************************************************************************
73 *****************************************************************************/
74 static int OpenDecoder ( vlc_object_t * );
75 static int OpenPacketizer( vlc_object_t * );
76 static void CloseDecoder ( vlc_object_t * );
78 static void *DecodeBlock ( decoder_t *, block_t ** );
79 static int ProcessHeaders( decoder_t * );
80 static void *ProcessPacket ( decoder_t *, ogg_packet *, block_t ** );
82 static picture_t *DecodePacket( decoder_t *, ogg_packet * );
84 static void ParseTheoraComments( decoder_t * );
85 static void theora_CopyPicture( picture_t *, yuv_buffer * );
87 static int OpenEncoder( vlc_object_t *p_this );
88 static void CloseEncoder( vlc_object_t *p_this );
89 static block_t *Encode( encoder_t *p_enc, picture_t *p_pict );
91 /*****************************************************************************
93 *****************************************************************************/
94 #define ENC_QUALITY_TEXT N_("Encoding quality")
95 #define ENC_QUALITY_LONGTEXT N_( \
96 "Enforce a quality between 1 (low) and 10 (high), instead " \
97 "of specifying a particular bitrate. This will produce a VBR stream." )
100 set_category( CAT_INPUT )
101 set_subcategory( SUBCAT_INPUT_VCODEC )
102 set_shortname( "Theora" )
103 set_description( N_("Theora video decoder") )
104 set_capability( "decoder", 100 )
105 set_callbacks( OpenDecoder, CloseDecoder )
106 add_shortcut( "theora" )
109 set_description( N_("Theora video packetizer") )
110 set_capability( "packetizer", 100 )
111 set_callbacks( OpenPacketizer, CloseDecoder )
112 add_shortcut( "theora" )
115 set_description( N_("Theora video encoder") )
116 set_capability( "encoder", 150 )
117 set_callbacks( OpenEncoder, CloseEncoder )
118 add_shortcut( "theora" )
120 # define ENC_CFG_PREFIX "sout-theora-"
121 add_integer( ENC_CFG_PREFIX "quality", 2, NULL, ENC_QUALITY_TEXT,
122 ENC_QUALITY_LONGTEXT, false )
125 static const char *const ppsz_enc_options[] = {
129 /*****************************************************************************
130 * OpenDecoder: probe the decoder and return score
131 *****************************************************************************/
132 static int OpenDecoder( vlc_object_t *p_this )
134 decoder_t *p_dec = (decoder_t*)p_this;
135 decoder_sys_t *p_sys;
137 if( p_dec->fmt_in.i_codec != VLC_CODEC_THEORA )
142 /* Allocate the memory needed to store the decoder's structure */
143 if( ( p_dec->p_sys = p_sys = malloc(sizeof(*p_sys)) ) == NULL )
145 p_dec->p_sys->b_packetizer = false;
147 p_sys->i_pts = VLC_TS_INVALID;
148 p_sys->b_decoded_first_keyframe = false;
150 /* Set output properties */
151 p_dec->fmt_out.i_cat = VIDEO_ES;
152 p_dec->fmt_out.i_codec = VLC_CODEC_I420;
155 p_dec->pf_decode_video = (picture_t *(*)(decoder_t *, block_t **))
157 p_dec->pf_packetize = (block_t *(*)(decoder_t *, block_t **))
160 /* Init supporting Theora structures needed in header parsing */
161 theora_comment_init( &p_sys->tc );
162 theora_info_init( &p_sys->ti );
164 p_sys->i_headers = 0;
169 static int OpenPacketizer( vlc_object_t *p_this )
171 decoder_t *p_dec = (decoder_t*)p_this;
173 int i_ret = OpenDecoder( p_this );
175 if( i_ret == VLC_SUCCESS )
177 p_dec->p_sys->b_packetizer = true;
178 p_dec->fmt_out.i_codec = VLC_CODEC_THEORA;
184 /****************************************************************************
185 * DecodeBlock: the whole thing
186 ****************************************************************************
187 * This function must be fed with ogg packets.
188 ****************************************************************************/
189 static void *DecodeBlock( decoder_t *p_dec, block_t **pp_block )
191 decoder_sys_t *p_sys = p_dec->p_sys;
193 ogg_packet oggpacket;
195 if( !pp_block || !*pp_block ) return NULL;
199 /* Block to Ogg packet */
200 oggpacket.packet = p_block->p_buffer;
201 oggpacket.bytes = p_block->i_buffer;
202 oggpacket.granulepos = p_block->i_dts;
205 oggpacket.packetno = 0;
207 /* Check for headers */
208 if( p_sys->i_headers == 0 && p_dec->fmt_in.i_extra )
210 /* Headers already available as extra data */
211 p_sys->i_headers = 3;
213 else if( oggpacket.bytes && p_sys->i_headers < 3 )
215 /* Backup headers as extra data */
218 p_dec->fmt_in.p_extra = xrealloc( p_dec->fmt_in.p_extra,
219 p_dec->fmt_in.i_extra + oggpacket.bytes + 2 );
220 p_extra = ((uint8_t *)p_dec->fmt_in.p_extra) + p_dec->fmt_in.i_extra;
221 *(p_extra++) = oggpacket.bytes >> 8;
222 *(p_extra++) = oggpacket.bytes & 0xFF;
224 memcpy( p_extra, oggpacket.packet, oggpacket.bytes );
225 p_dec->fmt_in.i_extra += oggpacket.bytes + 2;
227 block_Release( *pp_block );
232 if( p_sys->i_headers == 3 )
234 if( ProcessHeaders( p_dec ) != VLC_SUCCESS )
236 p_sys->i_headers = 0;
237 p_dec->fmt_in.i_extra = 0;
238 block_Release( *pp_block );
241 else p_sys->i_headers++;
244 return ProcessPacket( p_dec, &oggpacket, pp_block );
247 /*****************************************************************************
248 * ProcessHeaders: process Theora headers.
249 *****************************************************************************/
250 static int ProcessHeaders( decoder_t *p_dec )
252 decoder_sys_t *p_sys = p_dec->p_sys;
253 ogg_packet oggpacket;
257 if( !p_dec->fmt_in.i_extra ) return VLC_EGENERIC;
259 oggpacket.granulepos = -1;
260 oggpacket.b_o_s = 1; /* yes this actually is a b_o_s packet :) */
262 oggpacket.packetno = 0;
263 p_extra = p_dec->fmt_in.p_extra;
264 i_extra = p_dec->fmt_in.i_extra;
266 /* Take care of the initial Vorbis header */
267 oggpacket.bytes = *(p_extra++) << 8;
268 oggpacket.bytes |= (*(p_extra++) & 0xFF);
269 oggpacket.packet = p_extra;
270 p_extra += oggpacket.bytes;
271 i_extra -= (oggpacket.bytes + 2);
274 msg_Err( p_dec, "header data corrupted");
278 if( theora_decode_header( &p_sys->ti, &p_sys->tc, &oggpacket ) < 0 )
280 msg_Err( p_dec, "this bitstream does not contain Theora video data" );
284 /* Set output properties */
285 switch( p_sys->ti.pixelformat )
288 p_dec->fmt_out.i_codec = VLC_CODEC_I420;
291 p_dec->fmt_out.i_codec = VLC_CODEC_I422;
294 p_dec->fmt_out.i_codec = VLC_CODEC_I444;
298 msg_Err( p_dec, "unknown chroma in theora sample" );
301 p_dec->fmt_out.video.i_width = p_sys->ti.width;
302 p_dec->fmt_out.video.i_height = p_sys->ti.height;
303 if( p_sys->ti.frame_width && p_sys->ti.frame_height )
305 p_dec->fmt_out.video.i_visible_width = p_sys->ti.frame_width;
306 p_dec->fmt_out.video.i_visible_height = p_sys->ti.frame_height;
307 if( p_sys->ti.offset_x || p_sys->ti.offset_y )
309 p_dec->fmt_out.video.i_x_offset = p_sys->ti.offset_x;
310 p_dec->fmt_out.video.i_y_offset = p_sys->ti.offset_y;
314 if( p_sys->ti.aspect_denominator && p_sys->ti.aspect_numerator )
316 p_dec->fmt_out.video.i_aspect = ((int64_t)VOUT_ASPECT_FACTOR) *
317 ( p_sys->ti.aspect_numerator * p_dec->fmt_out.video.i_width ) /
318 ( p_sys->ti.aspect_denominator * p_dec->fmt_out.video.i_height );
322 p_dec->fmt_out.video.i_aspect = VOUT_ASPECT_FACTOR *
323 p_sys->ti.frame_width / p_sys->ti.frame_height;
326 if( p_sys->ti.fps_numerator > 0 && p_sys->ti.fps_denominator > 0 )
328 p_dec->fmt_out.video.i_frame_rate = p_sys->ti.fps_numerator;
329 p_dec->fmt_out.video.i_frame_rate_base = p_sys->ti.fps_denominator;
332 msg_Dbg( p_dec, "%dx%d %.02f fps video, frame content "
333 "is %dx%d with offset (%d,%d)",
334 p_sys->ti.width, p_sys->ti.height,
335 (double)p_sys->ti.fps_numerator/p_sys->ti.fps_denominator,
336 p_sys->ti.frame_width, p_sys->ti.frame_height,
337 p_sys->ti.offset_x, p_sys->ti.offset_y );
339 /* Sanity check that seems necessary for some corrupted files */
340 if( p_sys->ti.width < p_sys->ti.frame_width ||
341 p_sys->ti.height < p_sys->ti.frame_height )
343 msg_Warn( p_dec, "trying to correct invalid theora header "
344 "(frame size (%dx%d) is smaller than frame content (%d,%d))",
345 p_sys->ti.width, p_sys->ti.height,
346 p_sys->ti.frame_width, p_sys->ti.frame_height );
348 if( p_sys->ti.width < p_sys->ti.frame_width )
349 p_sys->ti.width = p_sys->ti.frame_width;
350 if( p_sys->ti.height < p_sys->ti.frame_height )
351 p_sys->ti.height = p_sys->ti.frame_height;
354 /* The next packet in order is the comments header */
356 oggpacket.bytes = *(p_extra++) << 8;
357 oggpacket.bytes |= (*(p_extra++) & 0xFF);
358 oggpacket.packet = p_extra;
359 p_extra += oggpacket.bytes;
360 i_extra -= (oggpacket.bytes + 2);
363 msg_Err( p_dec, "header data corrupted");
367 /* The next packet in order is the comments header */
368 if( theora_decode_header( &p_sys->ti, &p_sys->tc, &oggpacket ) < 0 )
370 msg_Err( p_dec, "2nd Theora header is corrupted" );
374 ParseTheoraComments( p_dec );
376 /* The next packet in order is the codebooks header
377 * We need to watch out that this packet is not missing as a
378 * missing or corrupted header is fatal. */
379 oggpacket.bytes = *(p_extra++) << 8;
380 oggpacket.bytes |= (*(p_extra++) & 0xFF);
381 oggpacket.packet = p_extra;
382 i_extra -= (oggpacket.bytes + 2);
385 msg_Err( p_dec, "header data corrupted");
389 /* The next packet in order is the codebooks header
390 * We need to watch out that this packet is not missing as a
391 * missing or corrupted header is fatal */
392 if( theora_decode_header( &p_sys->ti, &p_sys->tc, &oggpacket ) < 0 )
394 msg_Err( p_dec, "3rd Theora header is corrupted" );
398 if( !p_sys->b_packetizer )
400 /* We have all the headers, initialize decoder */
401 theora_decode_init( &p_sys->td, &p_sys->ti );
405 p_dec->fmt_out.i_extra = p_dec->fmt_in.i_extra;
406 p_dec->fmt_out.p_extra = xrealloc( p_dec->fmt_out.p_extra,
407 p_dec->fmt_out.i_extra );
408 memcpy( p_dec->fmt_out.p_extra,
409 p_dec->fmt_in.p_extra, p_dec->fmt_out.i_extra );
415 /*****************************************************************************
416 * ProcessPacket: processes a theora packet.
417 *****************************************************************************/
418 static void *ProcessPacket( decoder_t *p_dec, ogg_packet *p_oggpacket,
421 decoder_sys_t *p_sys = p_dec->p_sys;
422 block_t *p_block = *pp_block;
425 if( ( p_block->i_flags&(BLOCK_FLAG_DISCONTINUITY|BLOCK_FLAG_CORRUPTED) ) != 0 )
427 /* Don't send the the first packet after a discontinuity to
428 * theora_decode, otherwise we get purple/green display artifacts
429 * appearing in the video output */
433 /* Date management */
434 if( p_block->i_pts > VLC_TS_INVALID && p_block->i_pts != p_sys->i_pts )
436 p_sys->i_pts = p_block->i_pts;
439 *pp_block = NULL; /* To avoid being fed the same packet again */
441 if( p_sys->b_packetizer )
443 /* Date management */
444 p_block->i_dts = p_block->i_pts = p_sys->i_pts;
446 if( p_sys->i_headers >= 3 )
447 p_block->i_length = p_sys->i_pts - p_block->i_pts;
449 p_block->i_length = 0;
455 if( p_sys->i_headers >= 3 )
456 p_buf = DecodePacket( p_dec, p_oggpacket );
460 if( p_block ) block_Release( p_block );
463 /* Date management */
464 p_sys->i_pts += ( INT64_C(1000000) * p_sys->ti.fps_denominator /
465 p_sys->ti.fps_numerator ); /* 1 frame per packet */
470 /*****************************************************************************
471 * DecodePacket: decodes a Theora packet.
472 *****************************************************************************/
473 static picture_t *DecodePacket( decoder_t *p_dec, ogg_packet *p_oggpacket )
475 decoder_sys_t *p_sys = p_dec->p_sys;
479 theora_decode_packetin( &p_sys->td, p_oggpacket );
481 /* Check for keyframe */
482 if( !(p_oggpacket->packet[0] & 0x80) /* data packet */ &&
483 !(p_oggpacket->packet[0] & 0x40) /* intra frame */ )
484 p_sys->b_decoded_first_keyframe = true;
486 /* If we haven't seen a single keyframe yet, don't let Theora decode
487 * anything, otherwise we'll get display artifacts. (This is impossible
488 * in the general case, but can happen if e.g. we play a network stream
489 * using a timed URL, such that the server doesn't start the video with a
491 if( p_sys->b_decoded_first_keyframe )
492 theora_decode_YUVout( &p_sys->td, &yuv );
496 /* Get a new picture */
497 p_pic = decoder_NewPicture( p_dec );
498 if( !p_pic ) return NULL;
500 theora_CopyPicture( p_pic, &yuv );
502 p_pic->date = p_sys->i_pts;
507 /*****************************************************************************
508 * ParseTheoraComments:
509 *****************************************************************************/
510 static void ParseTheoraComments( decoder_t *p_dec )
512 char *psz_name, *psz_value, *psz_comment;
515 while ( i < p_dec->p_sys->tc.comments )
517 psz_comment = strdup( p_dec->p_sys->tc.user_comments[i] );
520 psz_name = psz_comment;
521 psz_value = strchr( psz_comment, '=' );
527 if( !p_dec->p_description )
528 p_dec->p_description = vlc_meta_New();
529 if( p_dec->p_description )
530 vlc_meta_AddExtra( p_dec->p_description, psz_name, psz_value );
537 /*****************************************************************************
538 * CloseDecoder: theora decoder destruction
539 *****************************************************************************/
540 static void CloseDecoder( vlc_object_t *p_this )
542 decoder_t *p_dec = (decoder_t *)p_this;
543 decoder_sys_t *p_sys = p_dec->p_sys;
545 theora_info_clear( &p_sys->ti );
546 theora_comment_clear( &p_sys->tc );
551 /*****************************************************************************
552 * theora_CopyPicture: copy a picture from theora internal buffers to a
553 * picture_t structure.
554 *****************************************************************************/
555 static void theora_CopyPicture( picture_t *p_pic,
558 int i_plane, i_line, i_dst_stride, i_src_stride;
559 uint8_t *p_dst, *p_src;
561 for( i_plane = 0; i_plane < p_pic->i_planes; i_plane++ )
563 p_dst = p_pic->p[i_plane].p_pixels;
564 p_src = i_plane ? (i_plane - 1 ? yuv->v : yuv->u ) : yuv->y;
565 i_dst_stride = p_pic->p[i_plane].i_pitch;
566 i_src_stride = i_plane ? yuv->uv_stride : yuv->y_stride;
568 for( i_line = 0; i_line < p_pic->p[i_plane].i_lines; i_line++ )
570 vlc_memcpy( p_dst, p_src,
571 i_plane ? yuv->uv_width : yuv->y_width );
572 p_src += i_src_stride;
573 p_dst += i_dst_stride;
578 /*****************************************************************************
579 * encoder_sys_t : theora encoder descriptor
580 *****************************************************************************/
591 theora_info ti; /* theora bitstream settings */
592 theora_comment tc; /* theora comment header */
593 theora_state td; /* theora bitstream user comments */
595 int i_width, i_height;
598 /*****************************************************************************
599 * OpenEncoder: probe the encoder and return score
600 *****************************************************************************/
601 static int OpenEncoder( vlc_object_t *p_this )
603 encoder_t *p_enc = (encoder_t *)p_this;
604 encoder_sys_t *p_sys;
609 if( p_enc->fmt_out.i_codec != VLC_CODEC_THEORA &&
615 /* Allocate the memory needed to store the decoder's structure */
616 if( ( p_sys = malloc(sizeof(encoder_sys_t)) ) == NULL )
618 p_enc->p_sys = p_sys;
620 p_enc->pf_encode_video = Encode;
621 p_enc->fmt_in.i_codec = VLC_CODEC_I420;
622 p_enc->fmt_out.i_codec = VLC_CODEC_THEORA;
624 config_ChainParse( p_enc, ENC_CFG_PREFIX, ppsz_enc_options, p_enc->p_cfg );
626 i_quality = var_GetInteger( p_enc, ENC_CFG_PREFIX "quality" );
627 if( i_quality > 10 ) i_quality = 10;
628 if( i_quality < 0 ) i_quality = 0;
630 theora_info_init( &p_sys->ti );
632 p_sys->ti.width = p_enc->fmt_in.video.i_width;
633 p_sys->ti.height = p_enc->fmt_in.video.i_height;
635 if( p_sys->ti.width % 16 || p_sys->ti.height % 16 )
637 /* Pictures from the transcoder should always have a pitch
638 * which is a multiple of 16 */
639 p_sys->ti.width = (p_sys->ti.width + 15) >> 4 << 4;
640 p_sys->ti.height = (p_sys->ti.height + 15) >> 4 << 4;
642 msg_Dbg( p_enc, "padding video from %dx%d to %dx%d",
643 p_enc->fmt_in.video.i_width, p_enc->fmt_in.video.i_height,
644 p_sys->ti.width, p_sys->ti.height );
647 p_sys->ti.frame_width = p_enc->fmt_in.video.i_width;
648 p_sys->ti.frame_height = p_enc->fmt_in.video.i_height;
649 p_sys->ti.offset_x = 0 /*frame_x_offset*/;
650 p_sys->ti.offset_y = 0 /*frame_y_offset*/;
652 p_sys->i_width = p_sys->ti.width;
653 p_sys->i_height = p_sys->ti.height;
655 if( !p_enc->fmt_in.video.i_frame_rate ||
656 !p_enc->fmt_in.video.i_frame_rate_base )
658 p_sys->ti.fps_numerator = 25;
659 p_sys->ti.fps_denominator = 1;
663 p_sys->ti.fps_numerator = p_enc->fmt_in.video.i_frame_rate;
664 p_sys->ti.fps_denominator = p_enc->fmt_in.video.i_frame_rate_base;
667 if( p_enc->fmt_in.video.i_aspect )
669 uint64_t i_num, i_den;
670 unsigned i_dst_num, i_dst_den;
672 i_num = p_enc->fmt_in.video.i_aspect * (int64_t)p_sys->ti.height;
673 i_den = VOUT_ASPECT_FACTOR * p_sys->ti.width;
674 vlc_ureduce( &i_dst_num, &i_dst_den, i_num, i_den, 0 );
675 p_sys->ti.aspect_numerator = i_dst_num;
676 p_sys->ti.aspect_denominator = i_dst_den;
680 p_sys->ti.aspect_numerator = 4;
681 p_sys->ti.aspect_denominator = 3;
684 p_sys->ti.target_bitrate = p_enc->fmt_out.i_bitrate;
685 p_sys->ti.quality = ((float)i_quality) * 6.3;
687 p_sys->ti.dropframes_p = 0;
688 p_sys->ti.quick_p = 1;
689 p_sys->ti.keyframe_auto_p = 1;
690 p_sys->ti.keyframe_frequency = 64;
691 p_sys->ti.keyframe_frequency_force = 64;
692 p_sys->ti.keyframe_data_target_bitrate = p_enc->fmt_out.i_bitrate * 1.5;
693 p_sys->ti.keyframe_auto_threshold = 80;
694 p_sys->ti.keyframe_mindistance = 8;
695 p_sys->ti.noise_sensitivity = 1;
697 theora_encode_init( &p_sys->td, &p_sys->ti );
698 theora_comment_init( &p_sys->tc );
700 /* Create and store headers */
701 p_enc->fmt_out.i_extra = 3 * 2;
702 for( i = 0; i < 3; i++ )
704 if( i == 0 ) theora_encode_header( &p_sys->td, &header );
705 else if( i == 1 ) theora_encode_comment( &p_sys->tc, &header );
706 else if( i == 2 ) theora_encode_tables( &p_sys->td, &header );
708 p_enc->fmt_out.p_extra = xrealloc( p_enc->fmt_out.p_extra,
709 p_enc->fmt_out.i_extra + header.bytes );
710 p_extra = p_enc->fmt_out.p_extra;
711 p_extra += p_enc->fmt_out.i_extra + (i-3)*2;
712 p_enc->fmt_out.i_extra += header.bytes;
714 *(p_extra++) = header.bytes >> 8;
715 *(p_extra++) = header.bytes & 0xFF;
717 memcpy( p_extra, header.packet, header.bytes );
723 /****************************************************************************
724 * Encode: the whole thing
725 ****************************************************************************
726 * This function spits out ogg packets.
727 ****************************************************************************/
728 static block_t *Encode( encoder_t *p_enc, picture_t *p_pict )
730 encoder_sys_t *p_sys = p_enc->p_sys;
731 ogg_packet oggpacket;
737 if( p_pict->p[0].i_pitch < (int)p_sys->i_width ||
738 p_pict->p[0].i_lines < (int)p_sys->i_height )
740 msg_Warn( p_enc, "frame is smaller than encoding size"
741 "(%ix%i->%ix%i) -> dropping frame",
742 p_pict->p[0].i_pitch, p_pict->p[0].i_lines,
743 p_sys->i_width, p_sys->i_height );
748 if( p_pict->p[0].i_visible_pitch < (int)p_sys->i_width )
750 for( i = 0; i < p_sys->i_height; i++ )
752 memset( p_pict->p[0].p_pixels + i * p_pict->p[0].i_pitch +
753 p_pict->p[0].i_visible_pitch,
754 *( p_pict->p[0].p_pixels + i * p_pict->p[0].i_pitch +
755 p_pict->p[0].i_visible_pitch - 1 ),
756 p_sys->i_width - p_pict->p[0].i_visible_pitch );
758 for( i = 0; i < p_sys->i_height / 2; i++ )
760 memset( p_pict->p[1].p_pixels + i * p_pict->p[1].i_pitch +
761 p_pict->p[1].i_visible_pitch,
762 *( p_pict->p[1].p_pixels + i * p_pict->p[1].i_pitch +
763 p_pict->p[1].i_visible_pitch - 1 ),
764 p_sys->i_width / 2 - p_pict->p[1].i_visible_pitch );
765 memset( p_pict->p[2].p_pixels + i * p_pict->p[2].i_pitch +
766 p_pict->p[2].i_visible_pitch,
767 *( p_pict->p[2].p_pixels + i * p_pict->p[2].i_pitch +
768 p_pict->p[2].i_visible_pitch - 1 ),
769 p_sys->i_width / 2 - p_pict->p[2].i_visible_pitch );
773 if( p_pict->p[0].i_visible_lines < (int)p_sys->i_height )
775 for( i = p_pict->p[0].i_visible_lines; i < p_sys->i_height; i++ )
777 memset( p_pict->p[0].p_pixels + i * p_pict->p[0].i_pitch, 0,
780 for( i = p_pict->p[1].i_visible_lines; i < p_sys->i_height / 2; i++ )
782 memset( p_pict->p[1].p_pixels + i * p_pict->p[1].i_pitch, 0x80,
783 p_sys->i_width / 2 );
784 memset( p_pict->p[2].p_pixels + i * p_pict->p[2].i_pitch, 0x80,
785 p_sys->i_width / 2 );
789 /* Theora is a one-frame-in, one-frame-out system. Submit a frame
790 * for compression and pull out the packet. */
792 yuv.y_width = p_sys->i_width;
793 yuv.y_height = p_sys->i_height;
794 yuv.y_stride = p_pict->p[0].i_pitch;
796 yuv.uv_width = p_sys->i_width / 2;
797 yuv.uv_height = p_sys->i_height / 2;
798 yuv.uv_stride = p_pict->p[1].i_pitch;
800 yuv.y = p_pict->p[0].p_pixels;
801 yuv.u = p_pict->p[1].p_pixels;
802 yuv.v = p_pict->p[2].p_pixels;
804 if( theora_encode_YUVin( &p_sys->td, &yuv ) < 0 )
806 msg_Warn( p_enc, "failed encoding a frame" );
810 theora_encode_packetout( &p_sys->td, 0, &oggpacket );
812 /* Ogg packet to block */
813 p_block = block_New( p_enc, oggpacket.bytes );
814 memcpy( p_block->p_buffer, oggpacket.packet, oggpacket.bytes );
815 p_block->i_dts = p_block->i_pts = p_pict->date;
817 if( theora_packet_iskeyframe( &oggpacket ) )
819 p_block->i_flags |= BLOCK_FLAG_TYPE_I;
825 /*****************************************************************************
826 * CloseEncoder: theora encoder destruction
827 *****************************************************************************/
828 static void CloseEncoder( vlc_object_t *p_this )
830 encoder_t *p_enc = (encoder_t *)p_this;
831 encoder_sys_t *p_sys = p_enc->p_sys;
833 theora_info_clear( &p_sys->ti );
834 theora_comment_clear( &p_sys->tc );