1 /*****************************************************************************
2 * video.c: video decoder using the ffmpeg library
3 *****************************************************************************
4 * Copyright (C) 1999-2001 the VideoLAN team
7 * Authors: Laurent Aimar <fenrir@via.ecp.fr>
8 * Gildas Bazin <gbazin@videolan.org>
10 * This program is free software; you can redistribute it and/or modify
11 * it under the terms of the GNU General Public License as published by
12 * the Free Software Foundation; either version 2 of the License, or
13 * (at your option) any later version.
15 * This program is distributed in the hope that it will be useful,
16 * but WITHOUT ANY WARRANTY; without even the implied warranty of
17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18 * GNU General Public License for more details.
20 * You should have received a copy of the GNU General Public License
21 * along with this program; if not, write to the Free Software
22 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
23 *****************************************************************************/
25 /*****************************************************************************
27 *****************************************************************************/
32 #include <vlc_common.h>
33 #include <vlc_codec.h>
35 #include <vlc_input.h> /* hmmm, just for INPUT_RATE_DEFAULT */
36 #include <vlc_codecs.h> /* BITMAPINFOHEADER */
39 #ifdef HAVE_LIBAVCODEC_AVCODEC_H
40 # include <libavcodec/avcodec.h>
41 #elif defined(HAVE_FFMPEG_AVCODEC_H)
42 # include <ffmpeg/avcodec.h>
50 /*****************************************************************************
51 * decoder_sys_t : decoder descriptor
52 *****************************************************************************/
57 /* Video decoder specific part */
63 BITMAPINFOHEADER *p_format;
65 /* for frame skipping algo */
67 enum AVDiscard i_skip_frame;
68 enum AVDiscard i_skip_idct;
70 /* how many decoded frames are late */
72 mtime_t i_late_frames_start;
74 /* for direct rendering */
75 int b_direct_rendering;
79 /* Hack to force display of still pictures */
82 int i_buffer_orig, i_buffer;
83 char *p_buffer_orig, *p_buffer;
86 AVPaletteControl palette;
92 /* FIXME (dummy palette for now) */
93 static const AVPaletteControl palette_control;
95 /*****************************************************************************
97 *****************************************************************************/
98 static void ffmpeg_InitCodec ( decoder_t * );
99 static void ffmpeg_CopyPicture ( decoder_t *, picture_t *, AVFrame * );
100 static int ffmpeg_GetFrameBuf ( struct AVCodecContext *, AVFrame * );
101 static int ffmpeg_ReGetFrameBuf( struct AVCodecContext *, AVFrame * );
102 static void ffmpeg_ReleaseFrameBuf( struct AVCodecContext *, AVFrame * );
103 static void ffmpeg_NextPts( decoder_t *, int i_block_rate );
105 static uint32_t ffmpeg_CodecTag( vlc_fourcc_t fcc )
107 uint8_t *p = (uint8_t*)&fcc;
108 return p[0] | (p[1] << 8) | (p[2] << 16) | (p[3] << 24);
111 /*****************************************************************************
113 *****************************************************************************/
115 /* Returns a new picture buffer */
116 static inline picture_t *ffmpeg_NewPictBuf( decoder_t *p_dec,
117 AVCodecContext *p_context )
121 p_dec->fmt_out.video.i_width = p_context->width;
122 p_dec->fmt_out.video.i_height = p_context->height;
124 if( !p_context->width || !p_context->height )
126 return NULL; /* invalid display size */
129 if( GetVlcChroma( &p_dec->fmt_out.video, p_context->pix_fmt ) != VLC_SUCCESS )
131 /* we are doomed, but not really, because most codecs set their pix_fmt much later */
132 p_dec->fmt_out.i_codec = VLC_FOURCC('I','4','2','0');
134 p_dec->fmt_out.i_codec = p_dec->fmt_out.video.i_chroma;
136 /* If an aspect-ratio was specified in the input format then force it */
137 if( p_dec->fmt_in.video.i_aspect )
139 p_dec->fmt_out.video.i_aspect = p_dec->fmt_in.video.i_aspect;
143 p_dec->fmt_out.video.i_aspect =
144 VOUT_ASPECT_FACTOR * ( av_q2d(p_context->sample_aspect_ratio) *
145 p_context->width / p_context->height );
146 p_dec->fmt_out.video.i_sar_num = p_context->sample_aspect_ratio.num;
147 p_dec->fmt_out.video.i_sar_den = p_context->sample_aspect_ratio.den;
149 if( p_dec->fmt_out.video.i_aspect == 0 )
151 p_dec->fmt_out.video.i_aspect =
152 VOUT_ASPECT_FACTOR * p_context->width / p_context->height;
156 if( p_dec->fmt_out.video.i_frame_rate > 0 &&
157 p_dec->fmt_out.video.i_frame_rate_base > 0 )
159 p_dec->fmt_out.video.i_frame_rate =
160 p_dec->fmt_in.video.i_frame_rate;
161 p_dec->fmt_out.video.i_frame_rate_base =
162 p_dec->fmt_in.video.i_frame_rate_base;
164 else if( p_context->time_base.num > 0 && p_context->time_base.den > 0 )
166 p_dec->fmt_out.video.i_frame_rate = p_context->time_base.den;
167 p_dec->fmt_out.video.i_frame_rate_base = p_context->time_base.num;
170 p_pic = p_dec->pf_vout_buffer_new( p_dec );
175 /*****************************************************************************
176 * InitVideo: initialize the video decoder
177 *****************************************************************************
178 * the ffmpeg codec will be opened, some memory allocated. The vout is not yet
179 * opened (done after the first decoded frame).
180 *****************************************************************************/
181 int InitVideoDec( decoder_t *p_dec, AVCodecContext *p_context,
182 AVCodec *p_codec, int i_codec_id, const char *psz_namecodec )
184 decoder_sys_t *p_sys;
187 /* Allocate the memory needed to store the decoder's structure */
188 if( ( p_dec->p_sys = p_sys =
189 (decoder_sys_t *)malloc(sizeof(decoder_sys_t)) ) == NULL )
193 memset( p_sys, 0, sizeof(decoder_sys_t) );
195 p_dec->p_sys->p_context = p_context;
196 p_dec->p_sys->p_codec = p_codec;
197 p_dec->p_sys->i_codec_id = i_codec_id;
198 p_dec->p_sys->psz_namecodec = psz_namecodec;
199 p_sys->p_ff_pic = avcodec_alloc_frame();
201 /* ***** Fill p_context with init values ***** */
202 p_sys->p_context->codec_tag = ffmpeg_CodecTag( p_dec->fmt_in.i_codec );
203 p_sys->p_context->width = p_dec->fmt_in.video.i_width;
204 p_sys->p_context->height = p_dec->fmt_in.video.i_height;
205 #if LIBAVCODEC_VERSION_INT < ((52<<16)+(0<<8)+0)
206 p_sys->p_context->bits_per_sample = p_dec->fmt_in.video.i_bits_per_pixel;
208 p_sys->p_context->bits_per_coded_sample = p_dec->fmt_in.video.i_bits_per_pixel;
211 /* ***** Get configuration of ffmpeg plugin ***** */
212 p_sys->p_context->workaround_bugs =
213 config_GetInt( p_dec, "ffmpeg-workaround-bugs" );
214 #if LIBAVCODEC_VERSION_INT < ((52<<16)+(0<<8)+0)
215 p_sys->p_context->error_resilience =
216 config_GetInt( p_dec, "ffmpeg-error-resilience" );
218 p_sys->p_context->error_recognition =
219 config_GetInt( p_dec, "ffmpeg-error-resilience" );
222 var_Create( p_dec, "grayscale", VLC_VAR_BOOL | VLC_VAR_DOINHERIT );
223 var_Get( p_dec, "grayscale", &val );
224 if( val.b_bool ) p_sys->p_context->flags |= CODEC_FLAG_GRAY;
226 var_Create( p_dec, "ffmpeg-vismv", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT );
227 var_Get( p_dec, "ffmpeg-vismv", &val );
228 if( val.i_int ) p_sys->p_context->debug_mv = val.i_int;
230 var_Create( p_dec, "ffmpeg-lowres", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT );
231 var_Get( p_dec, "ffmpeg-lowres", &val );
232 if( val.i_int > 0 && val.i_int <= 2 ) p_sys->p_context->lowres = val.i_int;
234 var_Create( p_dec, "ffmpeg-skiploopfilter",
235 VLC_VAR_INTEGER | VLC_VAR_DOINHERIT );
236 var_Get( p_dec, "ffmpeg-skiploopfilter", &val );
237 if( val.i_int > 0 ) p_sys->p_context->skip_loop_filter = AVDISCARD_NONREF;
238 if( val.i_int > 1 ) p_sys->p_context->skip_loop_filter = AVDISCARD_BIDIR;
239 if( val.i_int > 2 ) p_sys->p_context->skip_loop_filter = AVDISCARD_NONKEY;
240 if( val.i_int > 3 ) p_sys->p_context->skip_loop_filter = AVDISCARD_ALL;
242 /* ***** ffmpeg frame skipping ***** */
243 var_Create( p_dec, "ffmpeg-hurry-up", VLC_VAR_BOOL | VLC_VAR_DOINHERIT );
244 var_Get( p_dec, "ffmpeg-hurry-up", &val );
245 p_sys->b_hurry_up = val.b_bool;
247 var_Create( p_dec, "ffmpeg-skip-frame", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT );
248 var_Get( p_dec, "ffmpeg-skip-frame", &val );
252 p_sys->p_context->skip_frame = AVDISCARD_NONE;
255 p_sys->p_context->skip_frame = AVDISCARD_DEFAULT;
258 p_sys->p_context->skip_frame = AVDISCARD_BIDIR;
261 p_sys->p_context->skip_frame = AVDISCARD_NONKEY;
264 p_sys->p_context->skip_frame = AVDISCARD_ALL;
267 p_sys->p_context->skip_frame = AVDISCARD_NONE;
270 p_sys->i_skip_frame = p_sys->p_context->skip_frame;
272 var_Create( p_dec, "ffmpeg-skip-idct", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT );
273 var_Get( p_dec, "ffmpeg-skip-idct", &val );
277 p_sys->p_context->skip_idct = AVDISCARD_NONE;
280 p_sys->p_context->skip_idct = AVDISCARD_DEFAULT;
283 p_sys->p_context->skip_idct = AVDISCARD_BIDIR;
286 p_sys->p_context->skip_idct = AVDISCARD_NONKEY;
289 p_sys->p_context->skip_idct = AVDISCARD_ALL;
292 p_sys->p_context->skip_idct = AVDISCARD_NONE;
295 p_sys->i_skip_idct = p_sys->p_context->skip_idct;
297 /* ***** ffmpeg direct rendering ***** */
298 p_sys->b_direct_rendering = 0;
299 var_Create( p_dec, "ffmpeg-dr", VLC_VAR_BOOL | VLC_VAR_DOINHERIT );
300 var_Get( p_dec, "ffmpeg-dr", &val );
301 if( val.b_bool && (p_sys->p_codec->capabilities & CODEC_CAP_DR1) &&
302 /* Apparently direct rendering doesn't work with YUV422P */
303 p_sys->p_context->pix_fmt != PIX_FMT_YUV422P &&
304 /* H264 uses too many reference frames */
305 p_sys->i_codec_id != CODEC_ID_H264 &&
306 !p_sys->p_context->debug_mv )
308 /* Some codecs set pix_fmt only after the 1st frame has been decoded,
309 * so we need to do another check in ffmpeg_GetFrameBuf() */
310 p_sys->b_direct_rendering = 1;
313 /* ffmpeg doesn't properly release old pictures when frames are skipped */
314 //if( p_sys->b_hurry_up ) p_sys->b_direct_rendering = 0;
315 if( p_sys->b_direct_rendering )
317 msg_Dbg( p_dec, "using direct rendering" );
318 p_sys->p_context->flags |= CODEC_FLAG_EMU_EDGE;
321 /* Always use our get_buffer wrapper so we can calculate the
323 p_sys->p_context->get_buffer = ffmpeg_GetFrameBuf;
324 p_sys->p_context->reget_buffer = ffmpeg_ReGetFrameBuf;
325 p_sys->p_context->release_buffer = ffmpeg_ReleaseFrameBuf;
326 p_sys->p_context->opaque = p_dec;
328 /* ***** init this codec with special data ***** */
329 ffmpeg_InitCodec( p_dec );
331 /* ***** misc init ***** */
332 p_sys->input_pts = p_sys->input_dts = 0;
334 p_sys->b_has_b_frames = false;
335 p_sys->b_first_frame = true;
336 p_sys->b_flush = false;
337 p_sys->i_late_frames = 0;
339 p_sys->i_buffer_orig = 1;
340 p_sys->p_buffer_orig = p_sys->p_buffer = malloc( p_sys->i_buffer_orig );
341 if( !p_sys->p_buffer_orig )
347 /* Set output properties */
348 p_dec->fmt_out.i_cat = VIDEO_ES;
349 if( GetVlcChroma( &p_dec->fmt_out.video, p_context->pix_fmt ) != VLC_SUCCESS )
351 /* we are doomed. but not really, because most codecs set their pix_fmt later on */
352 p_dec->fmt_out.i_codec = VLC_FOURCC('I','4','2','0');
354 p_dec->fmt_out.i_codec = p_dec->fmt_out.video.i_chroma;
357 memset( &p_sys->palette, 0, sizeof(p_sys->palette) );
358 if( p_dec->fmt_in.video.p_palette )
360 p_sys->palette.palette_changed = 1;
362 for( int i = 0; i < __MIN( AVPALETTE_COUNT, p_dec->fmt_in.video.p_palette->i_entries ); i++ )
368 c.a[0] = p_dec->fmt_in.video.p_palette->palette[i][0];
369 c.a[1] = p_dec->fmt_in.video.p_palette->palette[i][1];
370 c.a[2] = p_dec->fmt_in.video.p_palette->palette[i][2];
371 c.a[3] = p_dec->fmt_in.video.p_palette->palette[i][3];
373 p_sys->palette.palette[i] = c.u;
375 p_sys->p_context->palctrl = &p_sys->palette;
377 p_dec->fmt_out.video.p_palette = malloc( sizeof(video_palette_t) );
378 if( p_dec->fmt_out.video.p_palette )
379 *p_dec->fmt_out.video.p_palette = *p_dec->fmt_in.video.p_palette;
381 else if( p_sys->i_codec_id != CODEC_ID_MSVIDEO1 && p_sys->i_codec_id != CODEC_ID_CINEPAK )
383 p_sys->p_context->palctrl = &p_sys->palette;
386 /* ***** Open the codec ***** */
387 vlc_mutex_t *lock = var_AcquireMutex( "avcodec" );
390 free( p_sys->p_buffer_orig );
395 if( avcodec_open( p_sys->p_context, p_sys->p_codec ) < 0 )
397 vlc_mutex_unlock( lock );
398 msg_Err( p_dec, "cannot open codec (%s)", p_sys->psz_namecodec );
399 free( p_sys->p_buffer_orig );
403 vlc_mutex_unlock( lock );
404 msg_Dbg( p_dec, "ffmpeg codec (%s) started", p_sys->psz_namecodec );
410 /*****************************************************************************
411 * DecodeVideo: Called to decode one or more frames
412 *****************************************************************************/
413 picture_t *DecodeVideo( decoder_t *p_dec, block_t **pp_block )
415 decoder_sys_t *p_sys = p_dec->p_sys;
417 int b_null_size = false;
420 if( !pp_block || !*pp_block ) return NULL;
422 if( !p_sys->p_context->extradata_size && p_dec->fmt_in.i_extra )
423 ffmpeg_InitCodec( p_dec );
427 if( p_block->i_flags & (BLOCK_FLAG_DISCONTINUITY|BLOCK_FLAG_CORRUPTED) )
430 p_sys->i_pts = 0; /* To make sure we recover properly */
432 p_sys->input_pts = p_sys->input_dts = 0;
433 p_sys->i_late_frames = 0;
435 block_Release( p_block );
437 //if( p_block->i_flags & BLOCK_FLAG_CORRUPTED )
438 //avcodec_flush_buffers( p_sys->p_context );
442 if( p_block->i_flags & BLOCK_FLAG_PREROLL )
444 /* Do not care about late frames when prerolling
445 * TODO avoid decoding of non reference frame
446 * (ie all B except for H264 where it depends only on nal_ref_idc) */
447 p_sys->i_late_frames = 0;
450 if( !p_dec->b_pace_control && (p_sys->i_late_frames > 0) &&
451 (mdate() - p_sys->i_late_frames_start > INT64_C(5000000)) )
455 msg_Err( p_dec, "more than 5 seconds of late video -> "
456 "dropping frame (computer too slow ?)" );
457 p_sys->i_pts = 0; /* To make sure we recover properly */
459 block_Release( p_block );
460 p_sys->i_late_frames--;
464 if( p_block->i_pts > 0 || p_block->i_dts > 0 )
466 p_sys->input_pts = p_block->i_pts;
467 p_sys->input_dts = p_block->i_dts;
469 /* Make sure we don't reuse the same timestamps twice */
470 p_block->i_pts = p_block->i_dts = 0;
473 /* A good idea could be to decode all I pictures and see for the other */
474 if( !p_dec->b_pace_control &&
476 (p_sys->i_late_frames > 4) )
479 if( p_sys->i_late_frames < 12 )
481 p_sys->p_context->skip_frame =
482 (p_sys->i_skip_frame <= AVDISCARD_BIDIR) ?
483 AVDISCARD_BIDIR : p_sys->i_skip_frame;
487 /* picture too late, won't decode
488 * but break picture until a new I, and for mpeg4 ...*/
489 p_sys->i_late_frames--; /* needed else it will never be decrease */
490 block_Release( p_block );
497 if( p_sys->b_hurry_up )
498 p_sys->p_context->skip_frame = p_sys->i_skip_frame;
499 if( !(p_block->i_flags & BLOCK_FLAG_PREROLL) )
505 if( p_sys->p_context->width <= 0 || p_sys->p_context->height <= 0 )
507 if( p_sys->b_hurry_up )
508 p_sys->p_context->skip_frame = p_sys->i_skip_frame;
513 * Do the actual decoding now
516 /* Don't forget that ffmpeg requires a little more bytes
517 * that the real frame size */
518 if( p_block->i_buffer > 0 )
520 p_sys->b_flush = ( p_block->i_flags & BLOCK_FLAG_END_OF_SEQUENCE ) != 0;
522 p_sys->i_buffer = p_block->i_buffer;
523 if( p_sys->i_buffer + FF_INPUT_BUFFER_PADDING_SIZE >
524 p_sys->i_buffer_orig )
526 free( p_sys->p_buffer_orig );
527 p_sys->i_buffer_orig =
528 p_block->i_buffer + FF_INPUT_BUFFER_PADDING_SIZE;
529 p_sys->p_buffer_orig = malloc( p_sys->i_buffer_orig );
531 p_sys->p_buffer = p_sys->p_buffer_orig;
532 p_sys->i_buffer = p_block->i_buffer;
533 if( !p_sys->p_buffer )
535 block_Release( p_block );
538 vlc_memcpy( p_sys->p_buffer, p_block->p_buffer, p_block->i_buffer );
539 memset( p_sys->p_buffer + p_block->i_buffer, 0,
540 FF_INPUT_BUFFER_PADDING_SIZE );
542 p_block->i_buffer = 0;
545 while( p_sys->i_buffer > 0 || p_sys->b_flush )
547 int i_used, b_gotpicture;
550 i_used = avcodec_decode_video( p_sys->p_context, p_sys->p_ff_pic,
552 p_sys->i_buffer <= 0 && p_sys->b_flush ? NULL : (uint8_t*)p_sys->p_buffer, p_sys->i_buffer );
554 if( b_null_size && p_sys->p_context->width > 0 &&
555 p_sys->p_context->height > 0 &&
558 /* Reparse it to not drop the I frame */
560 if( p_sys->b_hurry_up )
561 p_sys->p_context->skip_frame = p_sys->i_skip_frame;
562 i_used = avcodec_decode_video( p_sys->p_context, p_sys->p_ff_pic,
564 (uint8_t*)p_sys->p_buffer, p_sys->i_buffer );
568 p_sys->b_first_frame = true;
570 if( p_sys->i_buffer <= 0 )
571 p_sys->b_flush = false;
575 msg_Warn( p_dec, "cannot decode one frame (%d bytes)",
577 block_Release( p_block );
580 else if( i_used > p_sys->i_buffer )
582 i_used = p_sys->i_buffer;
586 p_sys->i_buffer -= i_used;
587 p_sys->p_buffer += i_used;
589 /* Nothing to display */
592 if( i_used == 0 ) break;
597 if( p_sys->p_ff_pic->pts )
598 p_sys->i_pts = p_sys->p_ff_pic->pts;
600 /* Update frame late count (except when doing preroll) */
601 if( p_sys->i_pts && decoder_GetDisplayDate(p_dec, p_sys->i_pts) <= mdate() &&
602 !(p_block->i_flags & BLOCK_FLAG_PREROLL) )
604 p_sys->i_late_frames++;
605 if( p_sys->i_late_frames == 1 )
606 p_sys->i_late_frames_start = mdate();
610 p_sys->i_late_frames = 0;
613 if( !b_drawpicture || !p_sys->p_ff_pic->linesize[0] )
615 /* Do not display the picture */
616 p_pic = (picture_t *)p_sys->p_ff_pic->opaque;
617 if( !b_drawpicture && p_pic )
618 p_dec->pf_vout_buffer_del( p_dec, p_pic );
620 ffmpeg_NextPts( p_dec, p_block->i_rate );
624 if( !p_sys->p_ff_pic->opaque )
626 /* Get a new picture */
627 p_pic = ffmpeg_NewPictBuf( p_dec, p_sys->p_context );
630 block_Release( p_block );
634 /* Fill p_picture_t from AVVideoFrame and do chroma conversion
636 ffmpeg_CopyPicture( p_dec, p_pic, p_sys->p_ff_pic );
640 p_pic = (picture_t *)p_sys->p_ff_pic->opaque;
643 /* Sanity check (seems to be needed for some streams) */
644 if( p_sys->p_ff_pic->pict_type == FF_B_TYPE )
646 p_sys->b_has_b_frames = true;
649 if( !p_dec->fmt_in.video.i_aspect )
651 /* Fetch again the aspect ratio in case it changed */
652 p_dec->fmt_out.video.i_aspect =
654 * ( av_q2d(p_sys->p_context->sample_aspect_ratio)
655 * p_sys->p_context->width / p_sys->p_context->height );
656 p_dec->fmt_out.video.i_sar_num
657 = p_sys->p_context->sample_aspect_ratio.num;
658 p_dec->fmt_out.video.i_sar_den
659 = p_sys->p_context->sample_aspect_ratio.den;
661 if( p_dec->fmt_out.video.i_aspect == 0 )
663 p_dec->fmt_out.video.i_aspect = VOUT_ASPECT_FACTOR
664 * p_sys->p_context->width / p_sys->p_context->height;
668 /* Send decoded frame to vout */
672 p_pic->date = p_sys->i_pts;
674 ffmpeg_NextPts( p_dec, p_block->i_rate );
676 if( p_sys->b_first_frame )
678 /* Hack to force display of still pictures */
679 p_sys->b_first_frame = false;
680 p_pic->b_force = true;
683 p_pic->i_nb_fields = 2 + p_sys->p_ff_pic->repeat_pict;
684 p_pic->b_progressive = !p_sys->p_ff_pic->interlaced_frame;
685 p_pic->b_top_field_first = p_sys->p_ff_pic->top_field_first;
687 p_pic->i_qstride = p_sys->p_ff_pic->qstride;
688 int i_mb_h = ( p_pic->format.i_height + 15 ) / 16;
689 p_pic->p_q = malloc( p_pic->i_qstride * i_mb_h );
690 memcpy( p_pic->p_q, p_sys->p_ff_pic->qscale_table,
691 p_pic->i_qstride * i_mb_h );
692 switch( p_sys->p_ff_pic->qscale_type )
694 case FF_QSCALE_TYPE_MPEG1:
695 p_pic->i_qtype = QTYPE_MPEG1;
697 case FF_QSCALE_TYPE_MPEG2:
698 p_pic->i_qtype = QTYPE_MPEG2;
700 case FF_QSCALE_TYPE_H264:
701 p_pic->i_qtype = QTYPE_H264;
709 p_dec->pf_vout_buffer_del( p_dec, p_pic );
713 block_Release( p_block );
717 /*****************************************************************************
718 * EndVideo: decoder destruction
719 *****************************************************************************
720 * This function is called when the thread ends after a successful
722 *****************************************************************************/
723 void EndVideoDec( decoder_t *p_dec )
725 decoder_sys_t *p_sys = p_dec->p_sys;
727 if( p_sys->p_ff_pic ) av_free( p_sys->p_ff_pic );
728 free( p_sys->p_buffer_orig );
731 /*****************************************************************************
732 * ffmpeg_InitCodec: setup codec extra initialization data for ffmpeg
733 *****************************************************************************/
734 static void ffmpeg_InitCodec( decoder_t *p_dec )
736 decoder_sys_t *p_sys = p_dec->p_sys;
737 int i_size = p_dec->fmt_in.i_extra;
739 if( !i_size ) return;
741 if( p_sys->i_codec_id == CODEC_ID_SVQ3 )
745 p_sys->p_context->extradata_size = i_size + 12;
746 p = p_sys->p_context->extradata =
747 malloc( p_sys->p_context->extradata_size );
751 memcpy( &p[0], "SVQ3", 4 );
752 memset( &p[4], 0, 8 );
753 memcpy( &p[12], p_dec->fmt_in.p_extra, i_size );
755 /* Now remove all atoms before the SMI one */
756 if( p_sys->p_context->extradata_size > 0x5a &&
757 strncmp( (char*)&p[0x56], "SMI ", 4 ) )
759 uint8_t *psz = &p[0x52];
761 while( psz < &p[p_sys->p_context->extradata_size - 8] )
763 int i_size = GetDWBE( psz );
766 /* FIXME handle 1 as long size */
769 if( !strncmp( (char*)&psz[4], "SMI ", 4 ) )
771 memmove( &p[0x52], psz,
772 &p[p_sys->p_context->extradata_size] - psz );
780 else if( p_dec->fmt_in.i_codec == VLC_FOURCC( 'R', 'V', '1', '0' ) ||
781 p_dec->fmt_in.i_codec == VLC_FOURCC( 'R', 'V', '1', '3' ) ||
782 p_dec->fmt_in.i_codec == VLC_FOURCC( 'R', 'V', '2', '0' ) )
784 if( p_dec->fmt_in.i_extra == 8 )
786 p_sys->p_context->extradata_size = 8;
787 p_sys->p_context->extradata = malloc( 8 );
788 if( p_sys->p_context->extradata )
790 memcpy( p_sys->p_context->extradata,
791 p_dec->fmt_in.p_extra, p_dec->fmt_in.i_extra );
792 p_sys->p_context->sub_id = ((uint32_t*)p_dec->fmt_in.p_extra)[1];
794 msg_Warn( p_dec, "using extra data for RV codec sub_id=%08x",
795 p_sys->p_context->sub_id );
801 p_sys->p_context->extradata_size = i_size;
802 p_sys->p_context->extradata =
803 malloc( i_size + FF_INPUT_BUFFER_PADDING_SIZE );
804 if( p_sys->p_context->extradata )
806 memcpy( p_sys->p_context->extradata,
807 p_dec->fmt_in.p_extra, i_size );
808 memset( &((uint8_t*)p_sys->p_context->extradata)[i_size],
809 0, FF_INPUT_BUFFER_PADDING_SIZE );
814 /*****************************************************************************
815 * ffmpeg_CopyPicture: copy a picture from ffmpeg internal buffers to a
816 * picture_t structure (when not in direct rendering mode).
817 *****************************************************************************/
818 static void ffmpeg_CopyPicture( decoder_t *p_dec,
819 picture_t *p_pic, AVFrame *p_ff_pic )
821 decoder_sys_t *p_sys = p_dec->p_sys;
823 if( TestFfmpegChroma( p_sys->p_context->pix_fmt, -1 ) == VLC_SUCCESS )
825 int i_plane, i_size, i_line;
826 uint8_t *p_dst, *p_src;
827 int i_src_stride, i_dst_stride;
829 for( i_plane = 0; i_plane < p_pic->i_planes; i_plane++ )
831 p_src = p_ff_pic->data[i_plane];
832 p_dst = p_pic->p[i_plane].p_pixels;
833 i_src_stride = p_ff_pic->linesize[i_plane];
834 i_dst_stride = p_pic->p[i_plane].i_pitch;
836 i_size = __MIN( i_src_stride, i_dst_stride );
837 for( i_line = 0; i_line < p_pic->p[i_plane].i_visible_lines;
840 vlc_memcpy( p_dst, p_src, i_size );
841 p_src += i_src_stride;
842 p_dst += i_dst_stride;
848 msg_Err( p_dec, "don't know how to convert chroma %i",
849 p_sys->p_context->pix_fmt );
854 /*****************************************************************************
855 * ffmpeg_GetFrameBuf: callback used by ffmpeg to get a frame buffer.
856 *****************************************************************************
857 * It is used for direct rendering as well as to get the right PTS for each
858 * decoded picture (even in indirect rendering mode).
859 *****************************************************************************/
860 static void ffmpeg_SetFrameBufferPts( decoder_t *p_dec, AVFrame *p_ff_pic );
862 static int ffmpeg_GetFrameBuf( struct AVCodecContext *p_context,
865 decoder_t *p_dec = (decoder_t *)p_context->opaque;
866 decoder_sys_t *p_sys = p_dec->p_sys;
869 /* Set picture PTS */
870 ffmpeg_SetFrameBufferPts( p_dec, p_ff_pic );
873 p_ff_pic->opaque = 0;
875 /* Not much to do in indirect rendering mode */
876 if( !p_sys->b_direct_rendering )
878 return avcodec_default_get_buffer( p_context, p_ff_pic );
881 /* Some codecs set pix_fmt only after the 1st frame has been decoded,
882 * so we need to check for direct rendering again. */
884 int i_width = p_sys->p_context->width;
885 int i_height = p_sys->p_context->height;
886 avcodec_align_dimensions( p_sys->p_context, &i_width, &i_height );
888 if( GetVlcChroma( &p_dec->fmt_out.video, p_context->pix_fmt ) != VLC_SUCCESS ||
889 p_sys->p_context->width % 16 || p_sys->p_context->height % 16 ||
890 /* We only pad picture up to 16 */
891 PAD(p_sys->p_context->width,16) < i_width || PAD(p_sys->p_context->height,16) < i_height ||
892 p_context->pix_fmt == PIX_FMT_PAL8 )
894 msg_Dbg( p_dec, "disabling direct rendering" );
895 p_sys->b_direct_rendering = 0;
896 return avcodec_default_get_buffer( p_context, p_ff_pic );
898 p_dec->fmt_out.i_codec = p_dec->fmt_out.video.i_chroma;
900 /* Get a new picture */
901 //p_sys->p_vout->render.b_allow_modify_pics = 0;
902 p_pic = ffmpeg_NewPictBuf( p_dec, p_sys->p_context );
905 p_sys->b_direct_rendering = 0;
906 return avcodec_default_get_buffer( p_context, p_ff_pic );
908 p_sys->p_context->draw_horiz_band = NULL;
910 p_ff_pic->opaque = (void*)p_pic;
911 p_ff_pic->type = FF_BUFFER_TYPE_USER;
912 p_ff_pic->data[0] = p_pic->p[0].p_pixels;
913 p_ff_pic->data[1] = p_pic->p[1].p_pixels;
914 p_ff_pic->data[2] = p_pic->p[2].p_pixels;
915 p_ff_pic->data[3] = NULL; /* alpha channel but I'm not sure */
917 p_ff_pic->linesize[0] = p_pic->p[0].i_pitch;
918 p_ff_pic->linesize[1] = p_pic->p[1].i_pitch;
919 p_ff_pic->linesize[2] = p_pic->p[2].i_pitch;
920 p_ff_pic->linesize[3] = 0;
922 if( p_ff_pic->reference != 0 )
924 p_dec->pf_picture_link( p_dec, p_pic );
927 /* FIXME what is that, should give good value */
928 p_ff_pic->age = 256*256*256*64; // FIXME FIXME from ffmpeg
932 static int ffmpeg_ReGetFrameBuf( struct AVCodecContext *p_context, AVFrame *p_ff_pic )
934 decoder_t *p_dec = (decoder_t *)p_context->opaque;
938 p_ff_pic->pts = AV_NOPTS_VALUE;
940 /* We always use default reget function, it works perfectly fine */
941 i_ret = avcodec_default_reget_buffer( p_context, p_ff_pic );
943 /* Set picture PTS if avcodec_default_reget_buffer didn't set it (through a
944 * ffmpeg_GetFrameBuf call) */
945 if( !i_ret && p_ff_pic->pts == AV_NOPTS_VALUE )
946 ffmpeg_SetFrameBufferPts( p_dec, p_ff_pic );
951 static void ffmpeg_SetFrameBufferPts( decoder_t *p_dec, AVFrame *p_ff_pic )
953 decoder_sys_t *p_sys = p_dec->p_sys;
955 /* Set picture PTS */
956 if( p_sys->input_pts )
958 p_ff_pic->pts = p_sys->input_pts;
960 else if( p_sys->input_dts )
962 /* Some demuxers only set the dts so let's try to find a useful
963 * timestamp from this */
964 if( !p_sys->p_context->has_b_frames || !p_sys->b_has_b_frames ||
965 !p_ff_pic->reference || !p_sys->i_pts )
967 p_ff_pic->pts = p_sys->input_dts;
979 if( p_sys->i_pts ) /* make sure 1st frame has a pts > 0 */
981 p_sys->input_pts = p_sys->input_dts = 0;
985 static void ffmpeg_ReleaseFrameBuf( struct AVCodecContext *p_context,
988 decoder_t *p_dec = (decoder_t *)p_context->opaque;
991 if( !p_ff_pic->opaque )
993 avcodec_default_release_buffer( p_context, p_ff_pic );
997 p_pic = (picture_t*)p_ff_pic->opaque;
999 p_ff_pic->data[0] = NULL;
1000 p_ff_pic->data[1] = NULL;
1001 p_ff_pic->data[2] = NULL;
1002 p_ff_pic->data[3] = NULL;
1004 if( p_ff_pic->reference != 0 )
1006 p_dec->pf_picture_unlink( p_dec, p_pic );
1010 static void ffmpeg_NextPts( decoder_t *p_dec, int i_block_rate )
1012 decoder_sys_t *p_sys = p_dec->p_sys;
1014 if( p_sys->i_pts <= 0 )
1017 /* interpolate the next PTS */
1018 if( p_dec->fmt_in.video.i_frame_rate > 0 &&
1019 p_dec->fmt_in.video.i_frame_rate_base > 0 )
1021 p_sys->i_pts += INT64_C(1000000) *
1022 (2 + p_sys->p_ff_pic->repeat_pict) *
1023 p_dec->fmt_in.video.i_frame_rate_base *
1024 i_block_rate / INPUT_RATE_DEFAULT /
1025 (2 * p_dec->fmt_in.video.i_frame_rate);
1027 else if( p_sys->p_context->time_base.den > 0 )
1029 p_sys->i_pts += INT64_C(1000000) *
1030 (2 + p_sys->p_ff_pic->repeat_pict) *
1031 p_sys->p_context->time_base.num *
1032 i_block_rate / INPUT_RATE_DEFAULT /
1033 (2 * p_sys->p_context->time_base.den);