1 /*****************************************************************************
2 * theora.c: theora decoder module making use of libtheora.
3 *****************************************************************************
4 * Copyright (C) 1999-2001 VideoLAN
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., 59 Temple Place - Suite 330, Boston, MA 02111, USA.
22 *****************************************************************************/
24 /*****************************************************************************
26 *****************************************************************************/
28 #include <vlc/decoder.h>
29 #include <vlc/input.h>
34 #include <theora/theora.h>
36 /*****************************************************************************
37 * decoder_sys_t : theora decoder descriptor
38 *****************************************************************************/
42 vlc_bool_t b_packetizer;
52 theora_info ti; /* theora bitstream settings */
53 theora_comment tc; /* theora comment header */
54 theora_state td; /* theora bitstream user comments */
62 /*****************************************************************************
64 *****************************************************************************/
65 static int OpenDecoder ( vlc_object_t * );
66 static int OpenPacketizer( vlc_object_t * );
67 static void CloseDecoder ( vlc_object_t * );
69 static void *DecodeBlock ( decoder_t *, block_t ** );
70 static void *ProcessPacket ( decoder_t *, ogg_packet *, block_t ** );
72 static picture_t *DecodePacket( decoder_t *, ogg_packet * );
74 static void ParseTheoraComments( decoder_t * );
75 static void theora_CopyPicture( decoder_t *, picture_t *, yuv_buffer * );
77 static int OpenEncoder( vlc_object_t *p_this );
78 static void CloseEncoder( vlc_object_t *p_this );
79 static block_t *Encode( encoder_t *p_enc, picture_t *p_pict );
81 /*****************************************************************************
83 *****************************************************************************/
84 #define ENC_QUALITY_TEXT N_("Encoding quality")
85 #define ENC_QUALITY_LONGTEXT N_( \
86 "Allows you to specify a quality between 1 (low) and 10 (high), instead " \
87 "of specifying a particular bitrate. This will produce a VBR stream." )
90 set_description( _("Theora video decoder") );
91 set_capability( "decoder", 100 );
92 set_callbacks( OpenDecoder, CloseDecoder );
93 add_shortcut( "theora" );
96 set_description( _("Theora video packetizer") );
97 set_capability( "packetizer", 100 );
98 set_callbacks( OpenPacketizer, CloseDecoder );
99 add_shortcut( "theora" );
102 set_description( _("Theora video encoder") );
103 set_capability( "encoder", 100 );
104 set_callbacks( OpenEncoder, CloseEncoder );
105 add_shortcut( "theora" );
107 # define ENC_CFG_PREFIX "sout-theora-"
108 add_integer( ENC_CFG_PREFIX "quality", 2, NULL, ENC_QUALITY_TEXT,
109 ENC_QUALITY_LONGTEXT, VLC_FALSE );
112 static const char *ppsz_enc_options[] = {
116 /*****************************************************************************
117 * OpenDecoder: probe the decoder and return score
118 *****************************************************************************/
119 static int OpenDecoder( vlc_object_t *p_this )
121 decoder_t *p_dec = (decoder_t*)p_this;
122 decoder_sys_t *p_sys;
124 if( p_dec->fmt_in.i_codec != VLC_FOURCC('t','h','e','o') )
129 /* Allocate the memory needed to store the decoder's structure */
130 if( ( p_dec->p_sys = p_sys =
131 (decoder_sys_t *)malloc(sizeof(decoder_sys_t)) ) == NULL )
133 msg_Err( p_dec, "out of memory" );
136 p_dec->p_sys->b_packetizer = VLC_FALSE;
140 /* Set output properties */
141 p_dec->fmt_out.i_cat = VIDEO_ES;
142 p_dec->fmt_out.i_codec = VLC_FOURCC('I','4','2','0');
145 p_dec->pf_decode_video = (picture_t *(*)(decoder_t *, block_t **))
147 p_dec->pf_packetize = (block_t *(*)(decoder_t *, block_t **))
150 /* Init supporting Theora structures needed in header parsing */
151 theora_comment_init( &p_sys->tc );
152 theora_info_init( &p_sys->ti );
154 p_sys->i_headers = 0;
159 static int OpenPacketizer( vlc_object_t *p_this )
161 decoder_t *p_dec = (decoder_t*)p_this;
163 int i_ret = OpenDecoder( p_this );
165 if( i_ret == VLC_SUCCESS )
167 p_dec->p_sys->b_packetizer = VLC_TRUE;
168 p_dec->fmt_out.i_codec = VLC_FOURCC( 't', 'h', 'e', 'o' );
174 /****************************************************************************
175 * DecodeBlock: the whole thing
176 ****************************************************************************
177 * This function must be fed with ogg packets.
178 ****************************************************************************/
179 static void *DecodeBlock( decoder_t *p_dec, block_t **pp_block )
181 decoder_sys_t *p_sys = p_dec->p_sys;
183 ogg_packet oggpacket;
185 if( !pp_block || !*pp_block ) return NULL;
189 /* Block to Ogg packet */
190 oggpacket.packet = p_block->p_buffer;
191 oggpacket.bytes = p_block->i_buffer;
192 oggpacket.granulepos = p_block->i_dts;
195 oggpacket.packetno = 0;
197 if( p_sys->i_headers == 0 )
199 /* Take care of the initial Theora header */
201 oggpacket.b_o_s = 1; /* yes this actually is a b_o_s packet :) */
202 if( theora_decode_header( &p_sys->ti, &p_sys->tc, &oggpacket ) < 0 )
204 msg_Err( p_dec, "This bitstream does not contain Theora "
206 block_Release( p_block );
211 /* Set output properties */
212 p_dec->fmt_out.video.i_width = p_sys->ti.width;
213 p_dec->fmt_out.video.i_height = p_sys->ti.height;
215 if( p_sys->ti.aspect_denominator && p_sys->ti.aspect_numerator )
217 p_dec->fmt_out.video.i_aspect = ((int64_t)VOUT_ASPECT_FACTOR) *
218 ( p_sys->ti.aspect_numerator * p_sys->ti.width ) /
219 ( p_sys->ti.aspect_denominator * p_sys->ti.height );
223 p_dec->fmt_out.video.i_aspect = VOUT_ASPECT_FACTOR *
224 p_sys->ti.frame_width / p_sys->ti.frame_height;
227 msg_Dbg( p_dec, "%dx%d %.02f fps video, frame content "
228 "is %dx%d with offset (%d,%d).",
229 p_sys->ti.width, p_sys->ti.height,
230 (double)p_sys->ti.fps_numerator/p_sys->ti.fps_denominator,
231 p_sys->ti.frame_width, p_sys->ti.frame_height,
232 p_sys->ti.offset_x, p_sys->ti.offset_y );
234 return ProcessPacket( p_dec, &oggpacket, pp_block );
237 if( p_sys->i_headers == 1 )
239 /* The next packet in order is the comments header */
240 if( theora_decode_header( &p_sys->ti, &p_sys->tc, &oggpacket ) < 0 )
242 msg_Err( p_dec, "2nd Theora header is corrupted." );
247 ParseTheoraComments( p_dec );
249 return ProcessPacket( p_dec, &oggpacket, pp_block );
252 if( p_sys->i_headers == 2 )
254 /* The next packet in order is the codebooks header
255 We need to watch out that this packet is not missing as a
256 missing or corrupted header is fatal. */
257 if( theora_decode_header( &p_sys->ti, &p_sys->tc, &oggpacket ) < 0 )
259 msg_Err( p_dec, "3rd Theora header is corrupted." );
264 if( !p_sys->b_packetizer )
266 /* We have all the headers, initialize decoder */
267 theora_decode_init( &p_sys->td, &p_sys->ti );
270 return ProcessPacket( p_dec, &oggpacket, pp_block );
273 return ProcessPacket( p_dec, &oggpacket, pp_block );
276 /*****************************************************************************
277 * ProcessPacket: processes a theora packet.
278 *****************************************************************************/
279 static void *ProcessPacket( decoder_t *p_dec, ogg_packet *p_oggpacket,
282 decoder_sys_t *p_sys = p_dec->p_sys;
283 block_t *p_block = *pp_block;
286 /* Date management */
287 if( p_block->i_pts > 0 && p_block->i_pts != p_sys->i_pts )
289 p_sys->i_pts = p_block->i_pts;
292 if( p_sys->b_packetizer )
294 /* Date management */
295 p_block->i_dts = p_block->i_pts = p_sys->i_pts;
297 if( p_sys->i_headers >= 3 )
298 p_block->i_length = p_sys->i_pts - p_block->i_pts;
300 p_block->i_length = 0;
306 if( p_sys->i_headers >= 3 )
307 p_buf = DecodePacket( p_dec, p_oggpacket );
313 block_Release( p_block );
318 /* Date management */
319 p_sys->i_pts += ( I64C(1000000) * p_sys->ti.fps_denominator /
320 p_sys->ti.fps_numerator ); /* 1 frame per packet */
325 /*****************************************************************************
326 * DecodePacket: decodes a Theora packet.
327 *****************************************************************************/
328 static picture_t *DecodePacket( decoder_t *p_dec, ogg_packet *p_oggpacket )
330 decoder_sys_t *p_sys = p_dec->p_sys;
334 theora_decode_packetin( &p_sys->td, p_oggpacket );
337 theora_decode_YUVout( &p_sys->td, &yuv );
339 /* Get a new picture */
340 p_pic = p_dec->pf_vout_buffer_new( p_dec );
341 if( !p_pic ) return NULL;
343 theora_CopyPicture( p_dec, p_pic, &yuv );
345 p_pic->date = p_sys->i_pts;
350 /*****************************************************************************
351 * ParseTheoraComments: FIXME should be done in demuxer
352 *****************************************************************************/
353 static void ParseTheoraComments( decoder_t *p_dec )
355 input_thread_t *p_input = (input_thread_t *)p_dec->p_parent;
358 char *psz_name, *psz_value, *psz_comment;
359 while ( i < p_dec->p_sys->tc.comments )
361 psz_comment = strdup( p_dec->p_sys->tc.user_comments[i] );
364 msg_Warn( p_dec, "out of memory" );
367 psz_name = psz_comment;
368 psz_value = strchr( psz_comment, '=' );
373 input_Control( p_input, INPUT_ADD_INFO, _("Theora comment"),
374 psz_name, psz_value );
381 /*****************************************************************************
382 * CloseDecoder: theora decoder destruction
383 *****************************************************************************/
384 static void CloseDecoder( vlc_object_t *p_this )
386 decoder_t *p_dec = (decoder_t *)p_this;
387 decoder_sys_t *p_sys = p_dec->p_sys;
389 theora_info_clear( &p_sys->ti );
390 theora_comment_clear( &p_sys->tc );
395 /*****************************************************************************
396 * theora_CopyPicture: copy a picture from theora internal buffers to a
397 * picture_t structure.
398 *****************************************************************************/
399 static void theora_CopyPicture( decoder_t *p_dec, picture_t *p_pic,
402 int i_plane, i_line, i_width, i_dst_stride, i_src_stride;
403 int i_src_xoffset, i_src_yoffset;
404 uint8_t *p_dst, *p_src;
406 for( i_plane = 0; i_plane < p_pic->i_planes; i_plane++ )
408 p_dst = p_pic->p[i_plane].p_pixels;
409 p_src = i_plane ? (i_plane - 1 ? yuv->v : yuv->u ) : yuv->y;
410 i_width = p_pic->p[i_plane].i_visible_pitch;
411 i_dst_stride = p_pic->p[i_plane].i_pitch;
412 i_src_stride = i_plane ? yuv->uv_stride : yuv->y_stride;
413 i_src_xoffset = p_dec->p_sys->ti.offset_x;
414 i_src_yoffset = p_dec->p_sys->ti.offset_y;
421 p_src += (i_src_yoffset * i_src_stride + i_src_yoffset);
423 for( i_line = 0; i_line < p_pic->p[i_plane].i_lines; i_line++ )
425 p_dec->p_vlc->pf_memcpy( p_dst, p_src, i_width );
426 p_src += i_src_stride;
427 p_dst += i_dst_stride;
432 /*****************************************************************************
433 * encoder_sys_t : theora encoder descriptor
434 *****************************************************************************/
440 vlc_bool_t b_headers;
445 theora_info ti; /* theora bitstream settings */
446 theora_comment tc; /* theora comment header */
447 theora_state td; /* theora bitstream user comments */
455 /*****************************************************************************
456 * OpenEncoder: probe the encoder and return score
457 *****************************************************************************/
458 static int OpenEncoder( vlc_object_t *p_this )
460 encoder_t *p_enc = (encoder_t *)p_this;
461 encoder_sys_t *p_sys = p_enc->p_sys;
462 ogg_packet header[3];
467 if( p_enc->fmt_out.i_codec != VLC_FOURCC('t','h','e','o') &&
473 if( p_enc->fmt_in.video.i_width % 16 ||
474 p_enc->fmt_in.video.i_height % 16 )
476 msg_Err( p_enc, "Theora video encoding requires dimensions which are "
477 "multiples of 16. Which is not the case here (%dx%d).",
478 p_enc->fmt_in.video.i_width, p_enc->fmt_in.video.i_height );
482 /* Allocate the memory needed to store the decoder's structure */
483 if( ( p_sys = (encoder_sys_t *)malloc(sizeof(encoder_sys_t)) ) == NULL )
485 msg_Err( p_enc, "out of memory" );
488 p_enc->p_sys = p_sys;
490 p_enc->pf_encode_video = Encode;
491 p_enc->fmt_in.i_codec = VLC_FOURCC('I','4','2','0');
492 p_enc->fmt_out.i_codec = VLC_FOURCC('t','h','e','o');
494 sout_CfgParse( p_enc, ENC_CFG_PREFIX, ppsz_enc_options, p_enc->p_cfg );
496 var_Get( p_enc, ENC_CFG_PREFIX "quality", &val );
497 i_quality = val.i_int;
498 if( i_quality > 10 ) i_quality = 10;
499 if( i_quality < 0 ) i_quality = 0;
501 theora_info_init( &p_sys->ti );
503 p_sys->ti.width = p_enc->fmt_in.video.i_width;
504 p_sys->ti.height = p_enc->fmt_in.video.i_height;
505 p_sys->ti.frame_width = p_enc->fmt_in.video.i_width;
506 p_sys->ti.frame_height = p_enc->fmt_in.video.i_height;
507 p_sys->ti.offset_x = 0 /*frame_x_offset*/;
508 p_sys->ti.offset_y = 0/*frame_y_offset*/;
510 if( !p_enc->fmt_in.video.i_frame_rate ||
511 !p_enc->fmt_in.video.i_frame_rate_base )
513 p_sys->ti.fps_numerator = 25;
514 p_sys->ti.fps_denominator = 1;
518 p_sys->ti.fps_numerator = p_enc->fmt_in.video.i_frame_rate;
519 p_sys->ti.fps_denominator = p_enc->fmt_in.video.i_frame_rate_base;
522 if( p_enc->fmt_in.video.i_aspect )
524 p_sys->ti.aspect_numerator =
525 p_enc->fmt_in.video.i_aspect * p_sys->ti.height / p_sys->ti.width;
526 p_sys->ti.aspect_denominator = VOUT_ASPECT_FACTOR;
530 p_sys->ti.aspect_numerator = 4;
531 p_sys->ti.aspect_denominator = 3;
534 p_sys->ti.target_bitrate = p_enc->fmt_out.i_bitrate;
535 p_sys->ti.quality = ((float)i_quality) * 6.3;
537 p_sys->ti.dropframes_p = 0;
538 p_sys->ti.quick_p = 1;
539 p_sys->ti.keyframe_auto_p = 1;
540 p_sys->ti.keyframe_frequency = 64;
541 p_sys->ti.keyframe_frequency_force = 64;
542 p_sys->ti.keyframe_data_target_bitrate = p_enc->fmt_out.i_bitrate * 1.5;
543 p_sys->ti.keyframe_auto_threshold = 80;
544 p_sys->ti.keyframe_mindistance = 8;
545 p_sys->ti.noise_sensitivity = 1;
547 theora_encode_init( &p_sys->td, &p_sys->ti );
548 theora_info_clear( &p_sys->ti );
549 theora_comment_init( &p_sys->tc );
551 /* Create and store headers */
552 theora_encode_header( &p_sys->td, &header[0] );
553 theora_encode_comment( &p_sys->tc, &header[1] );
554 theora_encode_tables( &p_sys->td, &header[2] );
555 p_enc->fmt_out.i_extra = 1 + 3 * 2 + header[0].bytes +
556 header[1].bytes + header[2].bytes;
557 p_extra = p_enc->fmt_out.p_extra = malloc( p_enc->fmt_out.i_extra );
558 *(p_extra++) = 3; /* number of headers */
559 for( i = 0; i < 3; i++ )
561 *(p_extra++) = header[i].bytes >> 8;
562 *(p_extra++) = header[i].bytes & 0xFF;
563 memcpy( p_extra, header[i].packet, header[i].bytes );
564 p_extra += header[i].bytes;
570 /****************************************************************************
571 * Encode: the whole thing
572 ****************************************************************************
573 * This function spits out ogg packets.
574 ****************************************************************************/
575 static block_t *Encode( encoder_t *p_enc, picture_t *p_pict )
577 encoder_sys_t *p_sys = p_enc->p_sys;
578 ogg_packet oggpacket;
582 /* Theora is a one-frame-in, one-frame-out system. Submit a frame
583 * for compression and pull out the packet. */
585 yuv.y_width = p_pict->p[0].i_visible_pitch;
586 yuv.y_height = p_pict->p[0].i_lines;
587 yuv.y_stride = p_pict->p[0].i_pitch;
589 yuv.uv_width = p_pict->p[1].i_visible_pitch;
590 yuv.uv_height = p_pict->p[1].i_lines;
591 yuv.uv_stride = p_pict->p[1].i_pitch;
593 yuv.y = p_pict->p[0].p_pixels;
594 yuv.u = p_pict->p[1].p_pixels;
595 yuv.v = p_pict->p[2].p_pixels;
597 if( theora_encode_YUVin( &p_sys->td, &yuv ) < 0 )
599 msg_Warn( p_enc, "failed encoding a frame" );
603 theora_encode_packetout( &p_sys->td, 0, &oggpacket );
605 /* Ogg packet to block */
606 p_block = block_New( p_enc, oggpacket.bytes );
607 memcpy( p_block->p_buffer, oggpacket.packet, oggpacket.bytes );
608 p_block->i_dts = p_block->i_pts = p_pict->date;
613 /*****************************************************************************
614 * CloseEncoder: theora encoder destruction
615 *****************************************************************************/
616 static void CloseEncoder( vlc_object_t *p_this )
618 encoder_t *p_enc = (encoder_t *)p_this;
619 encoder_sys_t *p_sys = p_enc->p_sys;
621 theora_info_clear( &p_sys->ti );
622 theora_comment_clear( &p_sys->tc );