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 *****************************************************************************/
29 #include <vlc_codec.h>
31 #include <vlc_input.h> /* hmmm, just for INPUT_RATE_DEFAULT */
34 #ifdef HAVE_FFMPEG_AVCODEC_H
35 # include <ffmpeg/avcodec.h>
42 /*****************************************************************************
43 * decoder_sys_t : decoder descriptor
44 *****************************************************************************/
47 /* Common part between video and audio decoder */
50 const char *psz_namecodec;
52 AVCodecContext *p_context;
55 /* Video decoder specific part */
61 BITMAPINFOHEADER *p_format;
63 /* for frame skipping algo */
67 /* how many decoded frames are late */
69 mtime_t i_late_frames_start;
71 /* for direct rendering */
72 int b_direct_rendering;
74 vlc_bool_t b_has_b_frames;
76 /* Hack to force display of still pictures */
77 vlc_bool_t b_first_frame;
79 int i_buffer_orig, i_buffer;
80 char *p_buffer_orig, *p_buffer;
82 /* Postprocessing handle */
85 vlc_bool_t b_pp_async;
89 /* FIXME (dummy palette for now) */
90 static AVPaletteControl palette_control;
92 /*****************************************************************************
94 *****************************************************************************/
95 static void ffmpeg_InitCodec ( decoder_t * );
96 static void ffmpeg_CopyPicture ( decoder_t *, picture_t *, AVFrame * );
97 static int ffmpeg_GetFrameBuf ( struct AVCodecContext *, AVFrame * );
98 static void ffmpeg_ReleaseFrameBuf( struct AVCodecContext *, AVFrame * );
100 static uint32_t ffmpeg_CodecTag( vlc_fourcc_t fcc )
102 uint8_t *p = (uint8_t*)&fcc;
103 return p[0] | (p[1] << 8) | (p[2] << 16) | (p[3] << 24);
106 /*****************************************************************************
108 *****************************************************************************/
109 static uint32_t ffmpeg_PixFmtToChroma( int i_ff_chroma )
111 switch( i_ff_chroma )
113 case PIX_FMT_YUV420P:
114 case PIX_FMT_YUVJ420P: /* Hacky but better then chroma conversion */
115 return VLC_FOURCC('I','4','2','0');
116 case PIX_FMT_YUV422P:
117 case PIX_FMT_YUVJ422P: /* Hacky but better then chroma conversion */
118 return VLC_FOURCC('I','4','2','2');
119 case PIX_FMT_YUV444P:
120 case PIX_FMT_YUVJ444P: /* Hacky but better then chroma conversion */
121 return VLC_FOURCC('I','4','4','4');
124 return VLC_FOURCC('Y','U','Y','2');
127 return VLC_FOURCC('R','V','1','5');
129 return VLC_FOURCC('R','V','1','6');
131 return VLC_FOURCC('R','V','2','4');
133 return VLC_FOURCC('R','V','3','2');
135 return VLC_FOURCC('G','R','E','Y');
137 case PIX_FMT_YUV410P:
138 case PIX_FMT_YUV411P:
145 /* Returns a new picture buffer */
146 static inline picture_t *ffmpeg_NewPictBuf( decoder_t *p_dec,
147 AVCodecContext *p_context )
149 decoder_sys_t *p_sys = p_dec->p_sys;
152 p_dec->fmt_out.video.i_width = p_context->width;
153 p_dec->fmt_out.video.i_height = p_context->height;
154 p_dec->fmt_out.i_codec = ffmpeg_PixFmtToChroma( p_context->pix_fmt );
156 if( !p_context->width || !p_context->height )
158 return NULL; /* invalid display size */
161 if( !p_dec->fmt_out.i_codec )
163 /* we make conversion if possible*/
164 p_dec->fmt_out.i_codec = VLC_FOURCC('I','4','2','0');
167 /* If an aspect-ratio was specified in the input format then force it */
168 if( p_dec->fmt_in.video.i_aspect )
170 p_dec->fmt_out.video.i_aspect = p_dec->fmt_in.video.i_aspect;
174 p_dec->fmt_out.video.i_aspect =
175 VOUT_ASPECT_FACTOR * ( av_q2d(p_context->sample_aspect_ratio) *
176 p_context->width / p_context->height );
177 p_dec->fmt_out.video.i_sar_num = p_context->sample_aspect_ratio.num;
178 p_dec->fmt_out.video.i_sar_den = p_context->sample_aspect_ratio.den;
180 if( p_dec->fmt_out.video.i_aspect == 0 )
182 p_dec->fmt_out.video.i_aspect =
183 VOUT_ASPECT_FACTOR * p_context->width / p_context->height;
187 if( p_dec->fmt_out.video.i_frame_rate > 0 &&
188 p_dec->fmt_out.video.i_frame_rate_base > 0 )
190 p_dec->fmt_out.video.i_frame_rate =
191 p_dec->fmt_in.video.i_frame_rate;
192 p_dec->fmt_out.video.i_frame_rate_base =
193 p_dec->fmt_out.video.i_frame_rate_base;
195 else if( p_context->time_base.num > 0 && p_context->time_base.den > 0 )
197 p_dec->fmt_out.video.i_frame_rate = p_context->time_base.den;
198 p_dec->fmt_out.video.i_frame_rate_base = p_context->time_base.num;
201 p_pic = p_dec->pf_vout_buffer_new( p_dec );
203 if( p_sys->p_pp && p_sys->b_pp && !p_sys->b_pp_init )
205 E_(InitPostproc)( p_dec, p_sys->p_pp, p_context->width,
206 p_context->height, p_context->pix_fmt );
207 p_sys->b_pp_init = VLC_TRUE;
213 /*****************************************************************************
214 * InitVideo: initialize the video decoder
215 *****************************************************************************
216 * the ffmpeg codec will be opened, some memory allocated. The vout is not yet
217 * opened (done after the first decoded frame).
218 *****************************************************************************/
219 int E_(InitVideoDec)( decoder_t *p_dec, AVCodecContext *p_context,
220 AVCodec *p_codec, int i_codec_id, const char *psz_namecodec )
222 decoder_sys_t *p_sys;
226 var_Get( p_dec->p_libvlc_global, "avcodec", &lockval );
228 /* Allocate the memory needed to store the decoder's structure */
229 if( ( p_dec->p_sys = p_sys =
230 (decoder_sys_t *)malloc(sizeof(decoder_sys_t)) ) == NULL )
232 msg_Err( p_dec, "out of memory" );
236 p_dec->p_sys->p_context = p_context;
237 p_dec->p_sys->p_codec = p_codec;
238 p_dec->p_sys->i_codec_id = i_codec_id;
239 p_dec->p_sys->psz_namecodec = psz_namecodec;
240 p_sys->p_ff_pic = avcodec_alloc_frame();
242 /* ***** Fill p_context with init values ***** */
243 p_sys->p_context->codec_tag = ffmpeg_CodecTag( p_dec->fmt_in.i_codec );
244 p_sys->p_context->width = p_dec->fmt_in.video.i_width;
245 p_sys->p_context->height = p_dec->fmt_in.video.i_height;
246 p_sys->p_context->bits_per_sample = p_dec->fmt_in.video.i_bits_per_pixel;
248 /* ***** Get configuration of ffmpeg plugin ***** */
249 p_sys->p_context->workaround_bugs =
250 config_GetInt( p_dec, "ffmpeg-workaround-bugs" );
251 p_sys->p_context->error_resilience =
252 config_GetInt( p_dec, "ffmpeg-error-resilience" );
254 var_Create( p_dec, "grayscale", VLC_VAR_BOOL | VLC_VAR_DOINHERIT );
255 var_Get( p_dec, "grayscale", &val );
256 if( val.b_bool ) p_sys->p_context->flags |= CODEC_FLAG_GRAY;
258 var_Create( p_dec, "ffmpeg-vismv", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT );
259 var_Get( p_dec, "ffmpeg-vismv", &val );
260 if( val.i_int ) p_sys->p_context->debug_mv = val.i_int;
262 var_Create( p_dec, "ffmpeg-lowres", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT );
263 var_Get( p_dec, "ffmpeg-lowres", &val );
264 if( val.i_int > 0 && val.i_int <= 2 ) p_sys->p_context->lowres = val.i_int;
266 var_Create( p_dec, "ffmpeg-skiploopfilter",
267 VLC_VAR_INTEGER | VLC_VAR_DOINHERIT );
268 var_Get( p_dec, "ffmpeg-skiploopfilter", &val );
269 if( val.i_int > 0 ) p_sys->p_context->skip_loop_filter = AVDISCARD_NONREF;
270 if( val.i_int > 1 ) p_sys->p_context->skip_loop_filter = AVDISCARD_BIDIR;
271 if( val.i_int > 2 ) p_sys->p_context->skip_loop_filter = AVDISCARD_NONKEY;
272 if( val.i_int > 3 ) p_sys->p_context->skip_loop_filter = AVDISCARD_ALL;
274 /* ***** ffmpeg frame skipping ***** */
275 var_Create( p_dec, "ffmpeg-hurry-up", VLC_VAR_BOOL | VLC_VAR_DOINHERIT );
276 var_Get( p_dec, "ffmpeg-hurry-up", &val );
277 p_sys->b_hurry_up = val.b_bool;
279 /* ***** ffmpeg direct rendering ***** */
280 p_sys->b_direct_rendering = 0;
281 var_Create( p_dec, "ffmpeg-dr", VLC_VAR_BOOL | VLC_VAR_DOINHERIT );
282 var_Get( p_dec, "ffmpeg-dr", &val );
283 if( val.b_bool && (p_sys->p_codec->capabilities & CODEC_CAP_DR1) &&
284 /* Apparently direct rendering doesn't work with YUV422P */
285 p_sys->p_context->pix_fmt != PIX_FMT_YUV422P &&
286 /* H264 uses too many reference frames */
287 p_sys->i_codec_id != CODEC_ID_H264 &&
288 !p_sys->p_context->debug_mv )
290 /* Some codecs set pix_fmt only after the 1st frame has been decoded,
291 * so we need to do another check in ffmpeg_GetFrameBuf() */
292 p_sys->b_direct_rendering = 1;
296 p_sys->b_pp = p_sys->b_pp_async = p_sys->b_pp_init = VLC_FALSE;
297 p_sys->p_pp = E_(OpenPostproc)( p_dec, &p_sys->b_pp_async );
299 /* ffmpeg doesn't properly release old pictures when frames are skipped */
300 //if( p_sys->b_hurry_up ) p_sys->b_direct_rendering = 0;
301 if( p_sys->b_direct_rendering )
303 msg_Dbg( p_dec, "using direct rendering" );
304 p_sys->p_context->flags |= CODEC_FLAG_EMU_EDGE;
307 /* Always use our get_buffer wrapper so we can calculate the
309 p_sys->p_context->get_buffer = ffmpeg_GetFrameBuf;
310 p_sys->p_context->release_buffer = ffmpeg_ReleaseFrameBuf;
311 p_sys->p_context->opaque = p_dec;
313 /* ***** init this codec with special data ***** */
314 ffmpeg_InitCodec( p_dec );
316 /* ***** misc init ***** */
317 p_sys->input_pts = p_sys->input_dts = 0;
319 p_sys->b_has_b_frames = VLC_FALSE;
320 p_sys->b_first_frame = VLC_TRUE;
321 p_sys->i_late_frames = 0;
323 p_sys->i_buffer_orig = 1;
324 p_sys->p_buffer_orig = p_sys->p_buffer = malloc( p_sys->i_buffer_orig );
326 /* Set output properties */
327 p_dec->fmt_out.i_cat = VIDEO_ES;
328 p_dec->fmt_out.i_codec = ffmpeg_PixFmtToChroma( p_context->pix_fmt );
331 if( p_dec->fmt_in.video.p_palette )
332 p_sys->p_context->palctrl =
333 (AVPaletteControl *)p_dec->fmt_in.video.p_palette;
335 p_sys->p_context->palctrl = &palette_control;
337 /* ***** Open the codec ***** */
338 vlc_mutex_lock( lockval.p_address );
339 if( avcodec_open( p_sys->p_context, p_sys->p_codec ) < 0 )
341 vlc_mutex_unlock( lockval.p_address );
342 msg_Err( p_dec, "cannot open codec (%s)", p_sys->psz_namecodec );
346 vlc_mutex_unlock( lockval.p_address );
347 msg_Dbg( p_dec, "ffmpeg codec (%s) started", p_sys->psz_namecodec );
353 /*****************************************************************************
354 * DecodeVideo: Called to decode one or more frames
355 *****************************************************************************/
356 picture_t *E_(DecodeVideo)( decoder_t *p_dec, block_t **pp_block )
358 decoder_sys_t *p_sys = p_dec->p_sys;
360 int b_null_size = VLC_FALSE;
363 if( !pp_block || !*pp_block ) return NULL;
365 if( !p_sys->p_context->extradata_size && p_dec->fmt_in.i_extra )
366 ffmpeg_InitCodec( p_dec );
370 if( p_block->i_flags & (BLOCK_FLAG_DISCONTINUITY|BLOCK_FLAG_CORRUPTED) )
373 p_sys->i_pts = 0; /* To make sure we recover properly */
375 p_sys->input_pts = p_sys->input_dts = 0;
376 p_sys->i_late_frames = 0;
378 block_Release( p_block );
382 if( p_block->i_flags & BLOCK_FLAG_PREROLL )
384 /* Do not care about late frames when prerolling
385 * TODO avoid decoding of non reference frame
386 * (ie all B except for H264 where it depends only on nal_ref_idc) */
387 p_sys->i_late_frames = 0;
390 if( !p_dec->b_pace_control && p_sys->i_late_frames > 0 &&
391 mdate() - p_sys->i_late_frames_start > I64C(5000000) )
395 msg_Err( p_dec, "more than 5 seconds of late video -> "
396 "dropping frame (computer too slow ?)" );
397 p_sys->i_pts = 0; /* To make sure we recover properly */
399 block_Release( p_block );
400 p_sys->i_late_frames--;
404 if( p_block->i_pts > 0 || p_block->i_dts > 0 )
406 p_sys->input_pts = p_block->i_pts;
407 p_sys->input_dts = p_block->i_dts;
409 /* Make sure we don't reuse the same timestamps twice */
410 p_block->i_pts = p_block->i_dts = 0;
413 /* TODO implement it in a better way */
414 /* A good idea could be to decode all I pictures and see for the other */
415 if( !p_dec->b_pace_control &&
416 p_sys->b_hurry_up && p_sys->i_late_frames > 4 )
419 if( p_sys->i_late_frames < 8 )
421 p_sys->p_context->hurry_up = 2;
425 /* picture too late, won't decode
426 * but break picture until a new I, and for mpeg4 ...*/
428 p_sys->i_late_frames--; /* needed else it will never be decrease */
429 block_Release( p_block );
436 if (!(p_block->i_flags & BLOCK_FLAG_PREROLL))
439 p_sys->p_context->hurry_up = 0;
444 p_sys->p_context->hurry_up = 1;
449 if( p_sys->p_context->width <= 0 || p_sys->p_context->height <= 0 )
451 p_sys->p_context->hurry_up = 5;
452 b_null_size = VLC_TRUE;
456 * Do the actual decoding now
459 /* Check if post-processing was enabled */
460 p_sys->b_pp = p_sys->b_pp_async;
462 /* Don't forget that ffmpeg requires a little more bytes
463 * that the real frame size */
464 if( p_block->i_buffer > 0 )
466 p_sys->i_buffer = p_block->i_buffer;
467 if( p_sys->i_buffer + FF_INPUT_BUFFER_PADDING_SIZE >
468 p_sys->i_buffer_orig )
470 free( p_sys->p_buffer_orig );
471 p_sys->i_buffer_orig =
472 p_block->i_buffer + FF_INPUT_BUFFER_PADDING_SIZE;
473 p_sys->p_buffer_orig = malloc( p_sys->i_buffer_orig );
475 p_sys->p_buffer = p_sys->p_buffer_orig;
476 p_sys->i_buffer = p_block->i_buffer;
477 p_dec->p_libvlc->pf_memcpy( p_sys->p_buffer, p_block->p_buffer,
479 memset( p_sys->p_buffer + p_block->i_buffer, 0,
480 FF_INPUT_BUFFER_PADDING_SIZE );
482 p_block->i_buffer = 0;
485 while( p_sys->i_buffer > 0 )
487 int i_used, b_gotpicture;
490 i_used = avcodec_decode_video( p_sys->p_context, p_sys->p_ff_pic,
492 (uint8_t*)p_sys->p_buffer, p_sys->i_buffer );
493 if( b_null_size && p_sys->p_context->width > 0 &&
494 p_sys->p_context->height > 0 )
496 /* Reparse it to not drop the I frame */
497 b_null_size = VLC_FALSE;
498 p_sys->p_context->hurry_up = 0;
499 i_used = avcodec_decode_video( p_sys->p_context, p_sys->p_ff_pic,
501 (uint8_t*)p_sys->p_buffer, p_sys->i_buffer );
506 msg_Warn( p_dec, "cannot decode one frame (%d bytes)",
508 block_Release( p_block );
511 else if( i_used > p_sys->i_buffer )
513 i_used = p_sys->i_buffer;
517 p_sys->i_buffer -= i_used;
518 p_sys->p_buffer += i_used;
520 /* Nothing to display */
523 if( i_used == 0 ) break;
527 /* Update frame late count (except when doing preroll) */
528 if( p_sys->i_pts && p_sys->i_pts <= mdate() &&
529 !(p_block->i_flags & BLOCK_FLAG_PREROLL) )
531 p_sys->i_late_frames++;
532 if( p_sys->i_late_frames == 1 )
533 p_sys->i_late_frames_start = mdate();
537 p_sys->i_late_frames = 0;
540 if( !b_drawpicture || !p_sys->p_ff_pic->linesize[0] )
542 /* Do not display the picture */
546 if( !p_sys->p_ff_pic->opaque )
548 /* Get a new picture */
549 p_pic = ffmpeg_NewPictBuf( p_dec, p_sys->p_context );
552 block_Release( p_block );
556 /* Fill p_picture_t from AVVideoFrame and do chroma conversion
558 ffmpeg_CopyPicture( p_dec, p_pic, p_sys->p_ff_pic );
562 p_pic = (picture_t *)p_sys->p_ff_pic->opaque;
566 if( p_sys->p_ff_pic->pts ) p_sys->i_pts = p_sys->p_ff_pic->pts;
568 /* Sanity check (seems to be needed for some streams) */
569 if( p_sys->p_ff_pic->pict_type == FF_B_TYPE )
571 p_sys->b_has_b_frames = VLC_TRUE;
574 if( !p_dec->fmt_in.video.i_aspect )
576 /* Fetch again the aspect ratio in case it changed */
577 p_dec->fmt_out.video.i_aspect =
579 * ( av_q2d(p_sys->p_context->sample_aspect_ratio)
580 * p_sys->p_context->width / p_sys->p_context->height );
581 p_dec->fmt_out.video.i_sar_num
582 = p_sys->p_context->sample_aspect_ratio.num;
583 p_dec->fmt_out.video.i_sar_den
584 = p_sys->p_context->sample_aspect_ratio.den;
586 if( p_dec->fmt_out.video.i_aspect == 0 )
588 p_dec->fmt_out.video.i_aspect = VOUT_ASPECT_FACTOR
589 * p_sys->p_context->width / p_sys->p_context->height;
593 /* Send decoded frame to vout */
596 p_pic->date = p_sys->i_pts;
598 /* interpolate the next PTS */
599 if( p_dec->fmt_in.video.i_frame_rate > 0 &&
600 p_dec->fmt_in.video.i_frame_rate_base > 0 )
602 p_sys->i_pts += I64C(1000000) *
603 (2 + p_sys->p_ff_pic->repeat_pict) *
604 p_dec->fmt_in.video.i_frame_rate_base *
605 p_block->i_rate / INPUT_RATE_DEFAULT /
606 (2 * p_dec->fmt_in.video.i_frame_rate);
608 else if( p_sys->p_context->time_base.den > 0 )
610 p_sys->i_pts += I64C(1000000) *
611 (2 + p_sys->p_ff_pic->repeat_pict) *
612 p_sys->p_context->time_base.num *
613 p_block->i_rate / INPUT_RATE_DEFAULT /
614 (2 * p_sys->p_context->time_base.den);
617 if( p_sys->b_first_frame )
619 /* Hack to force display of still pictures */
620 p_sys->b_first_frame = VLC_FALSE;
621 p_pic->b_force = VLC_TRUE;
624 p_pic->i_nb_fields = 2 + p_sys->p_ff_pic->repeat_pict;
625 p_pic->b_progressive = !p_sys->p_ff_pic->interlaced_frame;
626 p_pic->b_top_field_first = p_sys->p_ff_pic->top_field_first;
632 p_dec->pf_vout_buffer_del( p_dec, p_pic );
636 block_Release( p_block );
640 /*****************************************************************************
641 * EndVideo: decoder destruction
642 *****************************************************************************
643 * This function is called when the thread ends after a successful
645 *****************************************************************************/
646 void E_(EndVideoDec)( decoder_t *p_dec )
648 decoder_sys_t *p_sys = p_dec->p_sys;
650 if( p_sys->p_ff_pic ) av_free( p_sys->p_ff_pic );
651 E_(ClosePostproc)( p_dec, p_sys->p_pp );
652 free( p_sys->p_buffer_orig );
655 /*****************************************************************************
656 * ffmpeg_InitCodec: setup codec extra initialization data for ffmpeg
657 *****************************************************************************/
658 static void ffmpeg_InitCodec( decoder_t *p_dec )
660 decoder_sys_t *p_sys = p_dec->p_sys;
661 int i_size = p_dec->fmt_in.i_extra;
663 if( !i_size ) return;
665 if( p_sys->i_codec_id == CODEC_ID_SVQ3 )
669 p_sys->p_context->extradata_size = i_size + 12;
670 p = p_sys->p_context->extradata =
671 malloc( p_sys->p_context->extradata_size );
673 memcpy( &p[0], "SVQ3", 4 );
674 memset( &p[4], 0, 8 );
675 memcpy( &p[12], p_dec->fmt_in.p_extra, i_size );
677 /* Now remove all atoms before the SMI one */
678 if( p_sys->p_context->extradata_size > 0x5a &&
679 strncmp( (char*)&p[0x56], "SMI ", 4 ) )
681 uint8_t *psz = &p[0x52];
683 while( psz < &p[p_sys->p_context->extradata_size - 8] )
685 int i_size = GetDWBE( psz );
688 /* FIXME handle 1 as long size */
691 if( !strncmp( (char*)&psz[4], "SMI ", 4 ) )
693 memmove( &p[0x52], psz,
694 &p[p_sys->p_context->extradata_size] - psz );
702 else if( p_dec->fmt_in.i_codec == VLC_FOURCC( 'R', 'V', '1', '0' ) ||
703 p_dec->fmt_in.i_codec == VLC_FOURCC( 'R', 'V', '1', '3' ) ||
704 p_dec->fmt_in.i_codec == VLC_FOURCC( 'R', 'V', '2', '0' ) )
706 if( p_dec->fmt_in.i_extra == 8 )
708 p_sys->p_context->extradata_size = 8;
709 p_sys->p_context->extradata = malloc( 8 );
711 memcpy( p_sys->p_context->extradata,
712 p_dec->fmt_in.p_extra, p_dec->fmt_in.i_extra );
713 p_sys->p_context->sub_id= ((uint32_t*)p_dec->fmt_in.p_extra)[1];
715 msg_Warn( p_dec, "using extra data for RV codec sub_id=%08x",
716 p_sys->p_context->sub_id );
721 p_sys->p_context->extradata_size = i_size;
722 p_sys->p_context->extradata =
723 malloc( i_size + FF_INPUT_BUFFER_PADDING_SIZE );
724 memcpy( p_sys->p_context->extradata,
725 p_dec->fmt_in.p_extra, i_size );
726 memset( &((uint8_t*)p_sys->p_context->extradata)[i_size],
727 0, FF_INPUT_BUFFER_PADDING_SIZE );
731 /*****************************************************************************
732 * ffmpeg_CopyPicture: copy a picture from ffmpeg internal buffers to a
733 * picture_t structure (when not in direct rendering mode).
734 *****************************************************************************/
735 static void ffmpeg_CopyPicture( decoder_t *p_dec,
736 picture_t *p_pic, AVFrame *p_ff_pic )
738 decoder_sys_t *p_sys = p_dec->p_sys;
740 if( ffmpeg_PixFmtToChroma( p_sys->p_context->pix_fmt ) )
742 int i_plane, i_size, i_line;
743 uint8_t *p_dst, *p_src;
744 int i_src_stride, i_dst_stride;
746 if( p_sys->p_pp && p_sys->b_pp )
747 E_(PostprocPict)( p_dec, p_sys->p_pp, p_pic, p_ff_pic );
750 for( i_plane = 0; i_plane < p_pic->i_planes; i_plane++ )
752 p_src = p_ff_pic->data[i_plane];
753 p_dst = p_pic->p[i_plane].p_pixels;
754 i_src_stride = p_ff_pic->linesize[i_plane];
755 i_dst_stride = p_pic->p[i_plane].i_pitch;
757 i_size = __MIN( i_src_stride, i_dst_stride );
758 for( i_line = 0; i_line < p_pic->p[i_plane].i_visible_lines;
761 p_dec->p_libvlc->pf_memcpy( p_dst, p_src, i_size );
762 p_src += i_src_stride;
763 p_dst += i_dst_stride;
773 /* we need to convert to I420 */
774 switch( p_sys->p_context->pix_fmt )
776 case PIX_FMT_YUV410P:
777 case PIX_FMT_YUV411P:
780 for( i = 0; i < p_pic->i_planes; i++ )
782 dest_pic.data[i] = p_pic->p[i].p_pixels;
783 dest_pic.linesize[i] = p_pic->p[i].i_pitch;
785 #if !defined(HAVE_FFMPEG_SWSCALE_H) && !defined(HAVE_LIBSWSCALE_TREE)
786 img_convert( &dest_pic, PIX_FMT_YUV420P,
787 (AVPicture *)p_ff_pic,
788 p_sys->p_context->pix_fmt,
789 p_sys->p_context->width,
790 p_sys->p_context->height );
794 msg_Err( p_dec, "don't know how to convert chroma %i",
795 p_sys->p_context->pix_fmt );
802 /*****************************************************************************
803 * ffmpeg_GetFrameBuf: callback used by ffmpeg to get a frame buffer.
804 *****************************************************************************
805 * It is used for direct rendering as well as to get the right PTS for each
806 * decoded picture (even in indirect rendering mode).
807 *****************************************************************************/
808 static int ffmpeg_GetFrameBuf( struct AVCodecContext *p_context,
811 decoder_t *p_dec = (decoder_t *)p_context->opaque;
812 decoder_sys_t *p_sys = p_dec->p_sys;
815 /* Set picture PTS */
816 if( p_sys->input_pts )
818 p_ff_pic->pts = p_sys->input_pts;
820 else if( p_sys->input_dts )
822 /* Some demuxers only set the dts so let's try to find a useful
823 * timestamp from this */
824 if( !p_context->has_b_frames || !p_sys->b_has_b_frames ||
825 !p_ff_pic->reference || !p_sys->i_pts )
827 p_ff_pic->pts = p_sys->input_dts;
829 else p_ff_pic->pts = 0;
831 else p_ff_pic->pts = 0;
833 if( p_sys->i_pts ) /* make sure 1st frame has a pts > 0 */
835 p_sys->input_pts = p_sys->input_dts = 0;
838 p_ff_pic->opaque = 0;
840 /* Not much to do in indirect rendering mode */
841 if( !p_sys->b_direct_rendering || p_sys->b_pp )
843 return avcodec_default_get_buffer( p_context, p_ff_pic );
846 /* Some codecs set pix_fmt only after the 1st frame has been decoded,
847 * so this check is necessary. */
848 if( !ffmpeg_PixFmtToChroma( p_context->pix_fmt ) ||
849 p_sys->p_context->width % 16 || p_sys->p_context->height % 16 )
851 msg_Dbg( p_dec, "disabling direct rendering" );
852 p_sys->b_direct_rendering = 0;
853 return avcodec_default_get_buffer( p_context, p_ff_pic );
856 /* Get a new picture */
857 //p_sys->p_vout->render.b_allow_modify_pics = 0;
858 p_pic = ffmpeg_NewPictBuf( p_dec, p_sys->p_context );
861 p_sys->b_direct_rendering = 0;
862 return avcodec_default_get_buffer( p_context, p_ff_pic );
864 p_sys->p_context->draw_horiz_band = NULL;
866 p_ff_pic->opaque = (void*)p_pic;
867 p_ff_pic->type = FF_BUFFER_TYPE_USER;
868 p_ff_pic->data[0] = p_pic->p[0].p_pixels;
869 p_ff_pic->data[1] = p_pic->p[1].p_pixels;
870 p_ff_pic->data[2] = p_pic->p[2].p_pixels;
871 p_ff_pic->data[3] = NULL; /* alpha channel but I'm not sure */
873 p_ff_pic->linesize[0] = p_pic->p[0].i_pitch;
874 p_ff_pic->linesize[1] = p_pic->p[1].i_pitch;
875 p_ff_pic->linesize[2] = p_pic->p[2].i_pitch;
876 p_ff_pic->linesize[3] = 0;
878 if( p_ff_pic->reference != 0 ||
879 p_sys->i_codec_id == CODEC_ID_H264 /* Bug in libavcodec */ )
881 p_dec->pf_picture_link( p_dec, p_pic );
884 /* FIXME what is that, should give good value */
885 p_ff_pic->age = 256*256*256*64; // FIXME FIXME from ffmpeg
890 static void ffmpeg_ReleaseFrameBuf( struct AVCodecContext *p_context,
893 decoder_t *p_dec = (decoder_t *)p_context->opaque;
896 if( !p_ff_pic->opaque )
898 avcodec_default_release_buffer( p_context, p_ff_pic );
902 p_pic = (picture_t*)p_ff_pic->opaque;
904 p_ff_pic->data[0] = NULL;
905 p_ff_pic->data[1] = NULL;
906 p_ff_pic->data[2] = NULL;
907 p_ff_pic->data[3] = NULL;
909 if( p_ff_pic->reference != 0 ||
910 p_dec->p_sys->i_codec_id == CODEC_ID_H264 /* Bug in libavcodec */ )
912 p_dec->pf_picture_unlink( p_dec, p_pic );