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/decoder.h>
30 #include <vlc/input.h> /* hmmm, just for INPUT_RATE_DEFAULT */
33 #ifdef HAVE_FFMPEG_AVCODEC_H
34 # include <ffmpeg/avcodec.h>
41 /*****************************************************************************
42 * decoder_sys_t : decoder descriptor
43 *****************************************************************************/
46 /* Common part between video and audio decoder */
49 const char *psz_namecodec;
51 AVCodecContext *p_context;
54 /* Video decoder specific part */
60 BITMAPINFOHEADER *p_format;
62 /* for frame skipping algo */
66 /* how many decoded frames are late */
68 mtime_t i_late_frames_start;
70 /* for direct rendering */
71 int b_direct_rendering;
73 vlc_bool_t b_has_b_frames;
75 /* Hack to force display of still pictures */
76 vlc_bool_t b_first_frame;
78 int i_buffer_orig, i_buffer;
79 char *p_buffer_orig, *p_buffer;
81 /* Postprocessing handle */
84 vlc_bool_t b_pp_async;
88 /* FIXME (dummy palette for now) */
89 static AVPaletteControl palette_control;
91 /*****************************************************************************
93 *****************************************************************************/
94 static void ffmpeg_InitCodec ( decoder_t * );
95 static void ffmpeg_CopyPicture ( decoder_t *, picture_t *, AVFrame * );
96 static int ffmpeg_GetFrameBuf ( struct AVCodecContext *, AVFrame * );
97 static void ffmpeg_ReleaseFrameBuf( struct AVCodecContext *, AVFrame * );
99 static uint32_t ffmpeg_CodecTag( vlc_fourcc_t fcc )
101 uint8_t *p = (uint8_t*)&fcc;
102 return p[0] | (p[1] << 8) | (p[2] << 16) | (p[3] << 24);
105 /*****************************************************************************
107 *****************************************************************************/
108 static uint32_t ffmpeg_PixFmtToChroma( int i_ff_chroma )
110 switch( i_ff_chroma )
112 case PIX_FMT_YUV420P:
113 case PIX_FMT_YUVJ420P: /* Hacky but better then chroma conversion */
114 return VLC_FOURCC('I','4','2','0');
115 case PIX_FMT_YUV422P:
116 case PIX_FMT_YUVJ422P: /* Hacky but better then chroma conversion */
117 return VLC_FOURCC('I','4','2','2');
118 case PIX_FMT_YUV444P:
119 case PIX_FMT_YUVJ444P: /* Hacky but better then chroma conversion */
120 return VLC_FOURCC('I','4','4','4');
123 return VLC_FOURCC('Y','U','Y','2');
126 return VLC_FOURCC('R','V','1','5');
128 return VLC_FOURCC('R','V','1','6');
130 return VLC_FOURCC('R','V','2','4');
132 return VLC_FOURCC('R','V','3','2');
134 return VLC_FOURCC('G','R','E','Y');
136 case PIX_FMT_YUV410P:
137 case PIX_FMT_YUV411P:
144 /* Returns a new picture buffer */
145 static inline picture_t *ffmpeg_NewPictBuf( decoder_t *p_dec,
146 AVCodecContext *p_context )
148 decoder_sys_t *p_sys = p_dec->p_sys;
151 p_dec->fmt_out.video.i_width = p_context->width;
152 p_dec->fmt_out.video.i_height = p_context->height;
153 p_dec->fmt_out.i_codec = ffmpeg_PixFmtToChroma( p_context->pix_fmt );
155 if( !p_context->width || !p_context->height )
157 return NULL; /* invalid display size */
160 if( !p_dec->fmt_out.i_codec )
162 /* we make conversion if possible*/
163 p_dec->fmt_out.i_codec = VLC_FOURCC('I','4','2','0');
166 /* If an aspect-ratio was specified in the input format then force it */
167 if( p_dec->fmt_in.video.i_aspect )
169 p_dec->fmt_out.video.i_aspect = p_dec->fmt_in.video.i_aspect;
173 p_dec->fmt_out.video.i_aspect =
174 VOUT_ASPECT_FACTOR * ( av_q2d(p_context->sample_aspect_ratio) *
175 p_context->width / p_context->height );
176 p_dec->fmt_out.video.i_sar_num = p_context->sample_aspect_ratio.num;
177 p_dec->fmt_out.video.i_sar_den = p_context->sample_aspect_ratio.den;
179 if( p_dec->fmt_out.video.i_aspect == 0 )
181 p_dec->fmt_out.video.i_aspect =
182 VOUT_ASPECT_FACTOR * p_context->width / p_context->height;
186 if( p_dec->fmt_out.video.i_frame_rate > 0 &&
187 p_dec->fmt_out.video.i_frame_rate_base > 0 )
189 p_dec->fmt_out.video.i_frame_rate =
190 p_dec->fmt_in.video.i_frame_rate;
191 p_dec->fmt_out.video.i_frame_rate_base =
192 p_dec->fmt_out.video.i_frame_rate_base;
194 else if( p_context->time_base.num > 0 && p_context->time_base.den > 0 )
196 p_dec->fmt_out.video.i_frame_rate = p_context->time_base.den;
197 p_dec->fmt_out.video.i_frame_rate_base = p_context->time_base.num;
200 p_pic = p_dec->pf_vout_buffer_new( p_dec );
202 if( p_sys->p_pp && p_sys->b_pp && !p_sys->b_pp_init )
204 E_(InitPostproc)( p_dec, p_sys->p_pp, p_context->width,
205 p_context->height, p_context->pix_fmt );
206 p_sys->b_pp_init = VLC_TRUE;
212 /*****************************************************************************
213 * InitVideo: initialize the video decoder
214 *****************************************************************************
215 * the ffmpeg codec will be opened, some memory allocated. The vout is not yet
216 * opened (done after the first decoded frame).
217 *****************************************************************************/
218 int E_(InitVideoDec)( decoder_t *p_dec, AVCodecContext *p_context,
219 AVCodec *p_codec, int i_codec_id, const char *psz_namecodec )
221 decoder_sys_t *p_sys;
225 var_Get( p_dec->p_libvlc_global, "avcodec", &lockval );
227 /* Allocate the memory needed to store the decoder's structure */
228 if( ( p_dec->p_sys = p_sys =
229 (decoder_sys_t *)malloc(sizeof(decoder_sys_t)) ) == NULL )
231 msg_Err( p_dec, "out of memory" );
235 p_dec->p_sys->p_context = p_context;
236 p_dec->p_sys->p_codec = p_codec;
237 p_dec->p_sys->i_codec_id = i_codec_id;
238 p_dec->p_sys->psz_namecodec = psz_namecodec;
239 p_sys->p_ff_pic = avcodec_alloc_frame();
241 /* ***** Fill p_context with init values ***** */
242 p_sys->p_context->codec_tag = ffmpeg_CodecTag( p_dec->fmt_in.i_codec );
243 p_sys->p_context->width = p_dec->fmt_in.video.i_width;
244 p_sys->p_context->height = p_dec->fmt_in.video.i_height;
245 p_sys->p_context->bits_per_sample = p_dec->fmt_in.video.i_bits_per_pixel;
247 /* ***** Get configuration of ffmpeg plugin ***** */
248 p_sys->p_context->workaround_bugs =
249 config_GetInt( p_dec, "ffmpeg-workaround-bugs" );
250 p_sys->p_context->error_resilience =
251 config_GetInt( p_dec, "ffmpeg-error-resilience" );
253 var_Create( p_dec, "grayscale", VLC_VAR_BOOL | VLC_VAR_DOINHERIT );
254 var_Get( p_dec, "grayscale", &val );
255 if( val.b_bool ) p_sys->p_context->flags |= CODEC_FLAG_GRAY;
257 var_Create( p_dec, "ffmpeg-vismv", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT );
258 var_Get( p_dec, "ffmpeg-vismv", &val );
259 if( val.i_int ) p_sys->p_context->debug_mv = val.i_int;
261 var_Create( p_dec, "ffmpeg-lowres", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT );
262 var_Get( p_dec, "ffmpeg-lowres", &val );
263 if( val.i_int > 0 && val.i_int <= 2 ) p_sys->p_context->lowres = val.i_int;
265 var_Create( p_dec, "ffmpeg-skiploopfilter",
266 VLC_VAR_INTEGER | VLC_VAR_DOINHERIT );
267 var_Get( p_dec, "ffmpeg-skiploopfilter", &val );
268 if( val.i_int > 0 ) p_sys->p_context->skip_loop_filter = AVDISCARD_NONREF;
269 if( val.i_int > 1 ) p_sys->p_context->skip_loop_filter = AVDISCARD_BIDIR;
270 if( val.i_int > 2 ) p_sys->p_context->skip_loop_filter = AVDISCARD_NONKEY;
271 if( val.i_int > 3 ) p_sys->p_context->skip_loop_filter = AVDISCARD_ALL;
273 /* ***** ffmpeg frame skipping ***** */
274 var_Create( p_dec, "ffmpeg-hurry-up", VLC_VAR_BOOL | VLC_VAR_DOINHERIT );
275 var_Get( p_dec, "ffmpeg-hurry-up", &val );
276 p_sys->b_hurry_up = val.b_bool;
278 /* ***** ffmpeg direct rendering ***** */
279 p_sys->b_direct_rendering = 0;
280 var_Create( p_dec, "ffmpeg-dr", VLC_VAR_BOOL | VLC_VAR_DOINHERIT );
281 var_Get( p_dec, "ffmpeg-dr", &val );
282 if( val.b_bool && (p_sys->p_codec->capabilities & CODEC_CAP_DR1) &&
283 /* Apparently direct rendering doesn't work with YUV422P */
284 p_sys->p_context->pix_fmt != PIX_FMT_YUV422P &&
285 /* H264 uses too many reference frames */
286 p_sys->i_codec_id != CODEC_ID_H264 &&
287 !p_sys->p_context->debug_mv )
289 /* Some codecs set pix_fmt only after the 1st frame has been decoded,
290 * so we need to do another check in ffmpeg_GetFrameBuf() */
291 p_sys->b_direct_rendering = 1;
295 p_sys->b_pp = p_sys->b_pp_async = p_sys->b_pp_init = VLC_FALSE;
296 p_sys->p_pp = E_(OpenPostproc)( p_dec, &p_sys->b_pp_async );
298 /* ffmpeg doesn't properly release old pictures when frames are skipped */
299 //if( p_sys->b_hurry_up ) p_sys->b_direct_rendering = 0;
300 if( p_sys->b_direct_rendering )
302 msg_Dbg( p_dec, "using direct rendering" );
303 p_sys->p_context->flags |= CODEC_FLAG_EMU_EDGE;
306 /* Always use our get_buffer wrapper so we can calculate the
308 p_sys->p_context->get_buffer = ffmpeg_GetFrameBuf;
309 p_sys->p_context->release_buffer = ffmpeg_ReleaseFrameBuf;
310 p_sys->p_context->opaque = p_dec;
312 /* ***** init this codec with special data ***** */
313 ffmpeg_InitCodec( p_dec );
315 /* ***** misc init ***** */
316 p_sys->input_pts = p_sys->input_dts = 0;
318 p_sys->b_has_b_frames = VLC_FALSE;
319 p_sys->b_first_frame = VLC_TRUE;
320 p_sys->i_late_frames = 0;
322 p_sys->i_buffer_orig = 1;
323 p_sys->p_buffer_orig = p_sys->p_buffer = malloc( p_sys->i_buffer_orig );
325 /* Set output properties */
326 p_dec->fmt_out.i_cat = VIDEO_ES;
327 p_dec->fmt_out.i_codec = ffmpeg_PixFmtToChroma( p_context->pix_fmt );
330 if( p_dec->fmt_in.video.p_palette )
331 p_sys->p_context->palctrl =
332 (AVPaletteControl *)p_dec->fmt_in.video.p_palette;
334 p_sys->p_context->palctrl = &palette_control;
336 /* ***** Open the codec ***** */
337 vlc_mutex_lock( lockval.p_address );
338 if( avcodec_open( p_sys->p_context, p_sys->p_codec ) < 0 )
340 vlc_mutex_unlock( lockval.p_address );
341 msg_Err( p_dec, "cannot open codec (%s)", p_sys->psz_namecodec );
345 vlc_mutex_unlock( lockval.p_address );
346 msg_Dbg( p_dec, "ffmpeg codec (%s) started", p_sys->psz_namecodec );
352 /*****************************************************************************
353 * DecodeVideo: Called to decode one or more frames
354 *****************************************************************************/
355 picture_t *E_(DecodeVideo)( decoder_t *p_dec, block_t **pp_block )
357 decoder_sys_t *p_sys = p_dec->p_sys;
359 int b_null_size = VLC_FALSE;
362 if( !pp_block || !*pp_block ) return NULL;
364 if( !p_sys->p_context->extradata_size && p_dec->fmt_in.i_extra )
365 ffmpeg_InitCodec( p_dec );
369 if( p_block->i_flags & (BLOCK_FLAG_DISCONTINUITY|BLOCK_FLAG_CORRUPTED) )
372 p_sys->i_pts = 0; /* To make sure we recover properly */
374 p_sys->input_pts = p_sys->input_dts = 0;
375 p_sys->i_late_frames = 0;
377 block_Release( p_block );
381 if( p_block->i_flags & BLOCK_FLAG_PREROLL )
383 /* Do not care about late frames when prerolling
384 * TODO avoid decoding of non reference frame
385 * (ie all B except for H264 where it depends only on nal_ref_idc) */
386 p_sys->i_late_frames = 0;
389 if( !p_dec->b_pace_control && p_sys->i_late_frames > 0 &&
390 mdate() - p_sys->i_late_frames_start > I64C(5000000) )
394 msg_Err( p_dec, "more than 5 seconds of late video -> "
395 "dropping frame (computer too slow ?)" );
396 p_sys->i_pts = 0; /* To make sure we recover properly */
398 block_Release( p_block );
399 p_sys->i_late_frames--;
403 if( p_block->i_pts > 0 || p_block->i_dts > 0 )
405 p_sys->input_pts = p_block->i_pts;
406 p_sys->input_dts = p_block->i_dts;
408 /* Make sure we don't reuse the same timestamps twice */
409 p_block->i_pts = p_block->i_dts = 0;
412 /* TODO implement it in a better way */
413 /* A good idea could be to decode all I pictures and see for the other */
414 if( !p_dec->b_pace_control &&
415 p_sys->b_hurry_up && p_sys->i_late_frames > 4 )
418 if( p_sys->i_late_frames < 8 )
420 p_sys->p_context->hurry_up = 2;
424 /* picture too late, won't decode
425 * but break picture until a new I, and for mpeg4 ...*/
427 p_sys->i_late_frames--; /* needed else it will never be decrease */
428 block_Release( p_block );
435 if (!(p_block->i_flags & BLOCK_FLAG_PREROLL))
438 p_sys->p_context->hurry_up = 0;
443 p_sys->p_context->hurry_up = 1;
448 if( p_sys->p_context->width <= 0 || p_sys->p_context->height <= 0 )
450 p_sys->p_context->hurry_up = 5;
451 b_null_size = VLC_TRUE;
455 * Do the actual decoding now
458 /* Check if post-processing was enabled */
459 p_sys->b_pp = p_sys->b_pp_async;
461 /* Don't forget that ffmpeg requires a little more bytes
462 * that the real frame size */
463 if( p_block->i_buffer > 0 )
465 p_sys->i_buffer = p_block->i_buffer;
466 if( p_sys->i_buffer + FF_INPUT_BUFFER_PADDING_SIZE >
467 p_sys->i_buffer_orig )
469 free( p_sys->p_buffer_orig );
470 p_sys->i_buffer_orig =
471 p_block->i_buffer + FF_INPUT_BUFFER_PADDING_SIZE;
472 p_sys->p_buffer_orig = malloc( p_sys->i_buffer_orig );
474 p_sys->p_buffer = p_sys->p_buffer_orig;
475 p_sys->i_buffer = p_block->i_buffer;
476 p_dec->p_libvlc->pf_memcpy( p_sys->p_buffer, p_block->p_buffer,
478 memset( p_sys->p_buffer + p_block->i_buffer, 0,
479 FF_INPUT_BUFFER_PADDING_SIZE );
481 p_block->i_buffer = 0;
484 while( p_sys->i_buffer > 0 )
486 int i_used, b_gotpicture;
489 i_used = avcodec_decode_video( p_sys->p_context, p_sys->p_ff_pic,
491 (uint8_t*)p_sys->p_buffer, p_sys->i_buffer );
492 if( b_null_size && p_sys->p_context->width > 0 &&
493 p_sys->p_context->height > 0 )
495 /* Reparse it to not drop the I frame */
496 b_null_size = VLC_FALSE;
497 p_sys->p_context->hurry_up = 0;
498 i_used = avcodec_decode_video( p_sys->p_context, p_sys->p_ff_pic,
500 (uint8_t*)p_sys->p_buffer, p_sys->i_buffer );
505 msg_Warn( p_dec, "cannot decode one frame (%d bytes)",
507 block_Release( p_block );
510 else if( i_used > p_sys->i_buffer )
512 i_used = p_sys->i_buffer;
516 p_sys->i_buffer -= i_used;
517 p_sys->p_buffer += i_used;
519 /* Nothing to display */
522 if( i_used == 0 ) break;
526 /* Update frame late count (except when doing preroll) */
527 if( p_sys->i_pts && p_sys->i_pts <= mdate() &&
528 !(p_block->i_flags & BLOCK_FLAG_PREROLL) )
530 p_sys->i_late_frames++;
531 if( p_sys->i_late_frames == 1 )
532 p_sys->i_late_frames_start = mdate();
536 p_sys->i_late_frames = 0;
539 if( !b_drawpicture || !p_sys->p_ff_pic->linesize[0] )
541 /* Do not display the picture */
545 if( !p_sys->p_ff_pic->opaque )
547 /* Get a new picture */
548 p_pic = ffmpeg_NewPictBuf( p_dec, p_sys->p_context );
551 block_Release( p_block );
555 /* Fill p_picture_t from AVVideoFrame and do chroma conversion
557 ffmpeg_CopyPicture( p_dec, p_pic, p_sys->p_ff_pic );
561 p_pic = (picture_t *)p_sys->p_ff_pic->opaque;
565 if( p_sys->p_ff_pic->pts ) p_sys->i_pts = p_sys->p_ff_pic->pts;
567 /* Sanity check (seems to be needed for some streams) */
568 if( p_sys->p_ff_pic->pict_type == FF_B_TYPE )
570 p_sys->b_has_b_frames = VLC_TRUE;
573 if( !p_dec->fmt_in.video.i_aspect )
575 /* Fetch again the aspect ratio in case it changed */
576 p_dec->fmt_out.video.i_aspect =
578 * ( av_q2d(p_sys->p_context->sample_aspect_ratio)
579 * p_sys->p_context->width / p_sys->p_context->height );
580 p_dec->fmt_out.video.i_sar_num
581 = p_sys->p_context->sample_aspect_ratio.num;
582 p_dec->fmt_out.video.i_sar_den
583 = p_sys->p_context->sample_aspect_ratio.den;
585 if( p_dec->fmt_out.video.i_aspect == 0 )
587 p_dec->fmt_out.video.i_aspect = VOUT_ASPECT_FACTOR
588 * p_sys->p_context->width / p_sys->p_context->height;
592 /* Send decoded frame to vout */
595 p_pic->date = p_sys->i_pts;
597 /* interpolate the next PTS */
598 if( p_dec->fmt_in.video.i_frame_rate > 0 &&
599 p_dec->fmt_in.video.i_frame_rate_base > 0 )
601 p_sys->i_pts += I64C(1000000) *
602 (2 + p_sys->p_ff_pic->repeat_pict) *
603 p_dec->fmt_in.video.i_frame_rate_base *
604 p_block->i_rate / INPUT_RATE_DEFAULT /
605 (2 * p_dec->fmt_in.video.i_frame_rate);
607 else if( p_sys->p_context->time_base.den > 0 )
609 p_sys->i_pts += I64C(1000000) *
610 (2 + p_sys->p_ff_pic->repeat_pict) *
611 p_sys->p_context->time_base.num *
612 p_block->i_rate / INPUT_RATE_DEFAULT /
613 (2 * p_sys->p_context->time_base.den);
616 if( p_sys->b_first_frame )
618 /* Hack to force display of still pictures */
619 p_sys->b_first_frame = VLC_FALSE;
620 p_pic->b_force = VLC_TRUE;
623 p_pic->i_nb_fields = 2 + p_sys->p_ff_pic->repeat_pict;
624 p_pic->b_progressive = !p_sys->p_ff_pic->interlaced_frame;
625 p_pic->b_top_field_first = p_sys->p_ff_pic->top_field_first;
631 p_dec->pf_vout_buffer_del( p_dec, p_pic );
635 block_Release( p_block );
639 /*****************************************************************************
640 * EndVideo: decoder destruction
641 *****************************************************************************
642 * This function is called when the thread ends after a successful
644 *****************************************************************************/
645 void E_(EndVideoDec)( decoder_t *p_dec )
647 decoder_sys_t *p_sys = p_dec->p_sys;
649 if( p_sys->p_ff_pic ) av_free( p_sys->p_ff_pic );
650 E_(ClosePostproc)( p_dec, p_sys->p_pp );
651 free( p_sys->p_buffer_orig );
654 /*****************************************************************************
655 * ffmpeg_InitCodec: setup codec extra initialization data for ffmpeg
656 *****************************************************************************/
657 static void ffmpeg_InitCodec( decoder_t *p_dec )
659 decoder_sys_t *p_sys = p_dec->p_sys;
660 int i_size = p_dec->fmt_in.i_extra;
662 if( !i_size ) return;
664 if( p_sys->i_codec_id == CODEC_ID_SVQ3 )
668 p_sys->p_context->extradata_size = i_size + 12;
669 p = p_sys->p_context->extradata =
670 malloc( p_sys->p_context->extradata_size );
672 memcpy( &p[0], "SVQ3", 4 );
673 memset( &p[4], 0, 8 );
674 memcpy( &p[12], p_dec->fmt_in.p_extra, i_size );
676 /* Now remove all atoms before the SMI one */
677 if( p_sys->p_context->extradata_size > 0x5a &&
678 strncmp( (char*)&p[0x56], "SMI ", 4 ) )
680 uint8_t *psz = &p[0x52];
682 while( psz < &p[p_sys->p_context->extradata_size - 8] )
684 int i_size = GetDWBE( psz );
687 /* FIXME handle 1 as long size */
690 if( !strncmp( (char*)&psz[4], "SMI ", 4 ) )
692 memmove( &p[0x52], psz,
693 &p[p_sys->p_context->extradata_size] - psz );
701 else if( p_dec->fmt_in.i_codec == VLC_FOURCC( 'R', 'V', '1', '0' ) ||
702 p_dec->fmt_in.i_codec == VLC_FOURCC( 'R', 'V', '1', '3' ) ||
703 p_dec->fmt_in.i_codec == VLC_FOURCC( 'R', 'V', '2', '0' ) )
705 if( p_dec->fmt_in.i_extra == 8 )
707 p_sys->p_context->extradata_size = 8;
708 p_sys->p_context->extradata = malloc( 8 );
710 memcpy( p_sys->p_context->extradata,
711 p_dec->fmt_in.p_extra, p_dec->fmt_in.i_extra );
712 p_sys->p_context->sub_id= ((uint32_t*)p_dec->fmt_in.p_extra)[1];
714 msg_Warn( p_dec, "using extra data for RV codec sub_id=%08x",
715 p_sys->p_context->sub_id );
720 p_sys->p_context->extradata_size = i_size;
721 p_sys->p_context->extradata =
722 malloc( i_size + FF_INPUT_BUFFER_PADDING_SIZE );
723 memcpy( p_sys->p_context->extradata,
724 p_dec->fmt_in.p_extra, i_size );
725 memset( &((uint8_t*)p_sys->p_context->extradata)[i_size],
726 0, FF_INPUT_BUFFER_PADDING_SIZE );
730 /*****************************************************************************
731 * ffmpeg_CopyPicture: copy a picture from ffmpeg internal buffers to a
732 * picture_t structure (when not in direct rendering mode).
733 *****************************************************************************/
734 static void ffmpeg_CopyPicture( decoder_t *p_dec,
735 picture_t *p_pic, AVFrame *p_ff_pic )
737 decoder_sys_t *p_sys = p_dec->p_sys;
739 if( ffmpeg_PixFmtToChroma( p_sys->p_context->pix_fmt ) )
741 int i_plane, i_size, i_line;
742 uint8_t *p_dst, *p_src;
743 int i_src_stride, i_dst_stride;
745 if( p_sys->p_pp && p_sys->b_pp )
746 E_(PostprocPict)( p_dec, p_sys->p_pp, p_pic, p_ff_pic );
749 for( i_plane = 0; i_plane < p_pic->i_planes; i_plane++ )
751 p_src = p_ff_pic->data[i_plane];
752 p_dst = p_pic->p[i_plane].p_pixels;
753 i_src_stride = p_ff_pic->linesize[i_plane];
754 i_dst_stride = p_pic->p[i_plane].i_pitch;
756 i_size = __MIN( i_src_stride, i_dst_stride );
757 for( i_line = 0; i_line < p_pic->p[i_plane].i_visible_lines;
760 p_dec->p_libvlc->pf_memcpy( p_dst, p_src, i_size );
761 p_src += i_src_stride;
762 p_dst += i_dst_stride;
772 /* we need to convert to I420 */
773 switch( p_sys->p_context->pix_fmt )
775 case PIX_FMT_YUV410P:
776 case PIX_FMT_YUV411P:
779 for( i = 0; i < p_pic->i_planes; i++ )
781 dest_pic.data[i] = p_pic->p[i].p_pixels;
782 dest_pic.linesize[i] = p_pic->p[i].i_pitch;
784 #if !defined(HAVE_FFMPEG_SWSCALE_H) && !defined(HAVE_LIBSWSCALE_TREE)
785 img_convert( &dest_pic, PIX_FMT_YUV420P,
786 (AVPicture *)p_ff_pic,
787 p_sys->p_context->pix_fmt,
788 p_sys->p_context->width,
789 p_sys->p_context->height );
793 msg_Err( p_dec, "don't know how to convert chroma %i",
794 p_sys->p_context->pix_fmt );
801 /*****************************************************************************
802 * ffmpeg_GetFrameBuf: callback used by ffmpeg to get a frame buffer.
803 *****************************************************************************
804 * It is used for direct rendering as well as to get the right PTS for each
805 * decoded picture (even in indirect rendering mode).
806 *****************************************************************************/
807 static int ffmpeg_GetFrameBuf( struct AVCodecContext *p_context,
810 decoder_t *p_dec = (decoder_t *)p_context->opaque;
811 decoder_sys_t *p_sys = p_dec->p_sys;
814 /* Set picture PTS */
815 if( p_sys->input_pts )
817 p_ff_pic->pts = p_sys->input_pts;
819 else if( p_sys->input_dts )
821 /* Some demuxers only set the dts so let's try to find a useful
822 * timestamp from this */
823 if( !p_context->has_b_frames || !p_sys->b_has_b_frames ||
824 !p_ff_pic->reference || !p_sys->i_pts )
826 p_ff_pic->pts = p_sys->input_dts;
828 else p_ff_pic->pts = 0;
830 else p_ff_pic->pts = 0;
832 if( p_sys->i_pts ) /* make sure 1st frame has a pts > 0 */
834 p_sys->input_pts = p_sys->input_dts = 0;
837 p_ff_pic->opaque = 0;
839 /* Not much to do in indirect rendering mode */
840 if( !p_sys->b_direct_rendering || p_sys->b_pp )
842 return avcodec_default_get_buffer( p_context, p_ff_pic );
845 /* Some codecs set pix_fmt only after the 1st frame has been decoded,
846 * so this check is necessary. */
847 if( !ffmpeg_PixFmtToChroma( p_context->pix_fmt ) ||
848 p_sys->p_context->width % 16 || p_sys->p_context->height % 16 )
850 msg_Dbg( p_dec, "disabling direct rendering" );
851 p_sys->b_direct_rendering = 0;
852 return avcodec_default_get_buffer( p_context, p_ff_pic );
855 /* Get a new picture */
856 //p_sys->p_vout->render.b_allow_modify_pics = 0;
857 p_pic = ffmpeg_NewPictBuf( p_dec, p_sys->p_context );
860 p_sys->b_direct_rendering = 0;
861 return avcodec_default_get_buffer( p_context, p_ff_pic );
863 p_sys->p_context->draw_horiz_band = NULL;
865 p_ff_pic->opaque = (void*)p_pic;
866 p_ff_pic->type = FF_BUFFER_TYPE_USER;
867 p_ff_pic->data[0] = p_pic->p[0].p_pixels;
868 p_ff_pic->data[1] = p_pic->p[1].p_pixels;
869 p_ff_pic->data[2] = p_pic->p[2].p_pixels;
870 p_ff_pic->data[3] = NULL; /* alpha channel but I'm not sure */
872 p_ff_pic->linesize[0] = p_pic->p[0].i_pitch;
873 p_ff_pic->linesize[1] = p_pic->p[1].i_pitch;
874 p_ff_pic->linesize[2] = p_pic->p[2].i_pitch;
875 p_ff_pic->linesize[3] = 0;
877 if( p_ff_pic->reference != 0 ||
878 p_sys->i_codec_id == CODEC_ID_H264 /* Bug in libavcodec */ )
880 p_dec->pf_picture_link( p_dec, p_pic );
883 /* FIXME what is that, should give good value */
884 p_ff_pic->age = 256*256*256*64; // FIXME FIXME from ffmpeg
889 static void ffmpeg_ReleaseFrameBuf( struct AVCodecContext *p_context,
892 decoder_t *p_dec = (decoder_t *)p_context->opaque;
895 if( !p_ff_pic->opaque )
897 avcodec_default_release_buffer( p_context, p_ff_pic );
901 p_pic = (picture_t*)p_ff_pic->opaque;
903 p_ff_pic->data[0] = NULL;
904 p_ff_pic->data[1] = NULL;
905 p_ff_pic->data[2] = NULL;
906 p_ff_pic->data[3] = NULL;
908 if( p_ff_pic->reference != 0 ||
909 p_dec->p_sys->i_codec_id == CODEC_ID_H264 /* Bug in libavcodec */ )
911 p_dec->pf_picture_unlink( p_dec, p_pic );