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 /* FIXME (dummy palette for now) */
87 static AVPaletteControl palette_control;
89 /*****************************************************************************
91 *****************************************************************************/
92 static void ffmpeg_InitCodec ( decoder_t * );
93 static void ffmpeg_CopyPicture ( decoder_t *, picture_t *, AVFrame * );
94 static int ffmpeg_GetFrameBuf ( struct AVCodecContext *, AVFrame * );
95 static int ffmpeg_ReGetFrameBuf( struct AVCodecContext *, AVFrame * );
96 static void ffmpeg_ReleaseFrameBuf( struct AVCodecContext *, AVFrame * );
98 static uint32_t ffmpeg_CodecTag( vlc_fourcc_t fcc )
100 uint8_t *p = (uint8_t*)&fcc;
101 return p[0] | (p[1] << 8) | (p[2] << 16) | (p[3] << 24);
104 /*****************************************************************************
106 *****************************************************************************/
107 static uint32_t ffmpeg_PixFmtToChroma( int i_ff_chroma )
109 switch( i_ff_chroma )
111 case PIX_FMT_YUV420P:
112 case PIX_FMT_YUVJ420P: /* Hacky but better then chroma conversion */
113 return VLC_FOURCC('I','4','2','0');
114 case PIX_FMT_YUV422P:
115 case PIX_FMT_YUVJ422P: /* Hacky but better then chroma conversion */
116 return VLC_FOURCC('I','4','2','2');
117 case PIX_FMT_YUV444P:
118 case PIX_FMT_YUVJ444P: /* Hacky but better then chroma conversion */
119 return VLC_FOURCC('I','4','4','4');
122 return VLC_FOURCC('Y','U','Y','2');
124 #if defined(WORDS_BIGENDIAN)
126 return VLC_FOURCC('R','G','B','8');
128 return VLC_FOURCC('R','V','1','5');
130 return VLC_FOURCC('R','V','1','6');
132 return VLC_FOURCC('R','V','2','4');
134 #if defined(PIX_FMT_RGB8)
136 return VLC_FOURCC('R','G','B','8');
139 return VLC_FOURCC('R','V','1','5');
141 return VLC_FOURCC('R','V','1','6');
143 return VLC_FOURCC('R','V','2','4');
146 return VLC_FOURCC('R','V','3','2');
149 return VLC_FOURCC('R','G','B','A');
152 return VLC_FOURCC('G','R','E','Y');
155 #if defined(HAVE_LIBSWSCALE_SWSCALE_H) || defined(HAVE_FFMPEG_SWSCALE_H)
156 if( GetVlcChroma( i_ff_chroma ) )
157 return GetVlcChroma( i_ff_chroma );
163 /* Returns a new picture buffer */
164 static inline picture_t *ffmpeg_NewPictBuf( decoder_t *p_dec,
165 AVCodecContext *p_context )
169 p_dec->fmt_out.video.i_width = p_context->width;
170 p_dec->fmt_out.video.i_height = p_context->height;
171 p_dec->fmt_out.i_codec = ffmpeg_PixFmtToChroma( p_context->pix_fmt );
173 if( !p_context->width || !p_context->height )
175 return NULL; /* invalid display size */
178 if( !p_dec->fmt_out.i_codec )
180 /* we make conversion if possible*/
181 p_dec->fmt_out.i_codec = VLC_FOURCC('I','4','2','0');
184 /* If an aspect-ratio was specified in the input format then force it */
185 if( p_dec->fmt_in.video.i_aspect )
187 p_dec->fmt_out.video.i_aspect = p_dec->fmt_in.video.i_aspect;
191 p_dec->fmt_out.video.i_aspect =
192 VOUT_ASPECT_FACTOR * ( av_q2d(p_context->sample_aspect_ratio) *
193 p_context->width / p_context->height );
194 p_dec->fmt_out.video.i_sar_num = p_context->sample_aspect_ratio.num;
195 p_dec->fmt_out.video.i_sar_den = p_context->sample_aspect_ratio.den;
197 if( p_dec->fmt_out.video.i_aspect == 0 )
199 p_dec->fmt_out.video.i_aspect =
200 VOUT_ASPECT_FACTOR * p_context->width / p_context->height;
204 if( p_dec->fmt_out.video.i_frame_rate > 0 &&
205 p_dec->fmt_out.video.i_frame_rate_base > 0 )
207 p_dec->fmt_out.video.i_frame_rate =
208 p_dec->fmt_in.video.i_frame_rate;
209 p_dec->fmt_out.video.i_frame_rate_base =
210 p_dec->fmt_in.video.i_frame_rate_base;
212 else if( p_context->time_base.num > 0 && p_context->time_base.den > 0 )
214 p_dec->fmt_out.video.i_frame_rate = p_context->time_base.den;
215 p_dec->fmt_out.video.i_frame_rate_base = p_context->time_base.num;
218 p_pic = p_dec->pf_vout_buffer_new( p_dec );
223 /*****************************************************************************
224 * InitVideo: initialize the video decoder
225 *****************************************************************************
226 * the ffmpeg codec will be opened, some memory allocated. The vout is not yet
227 * opened (done after the first decoded frame).
228 *****************************************************************************/
229 int InitVideoDec( decoder_t *p_dec, AVCodecContext *p_context,
230 AVCodec *p_codec, int i_codec_id, const char *psz_namecodec )
232 decoder_sys_t *p_sys;
235 /* Allocate the memory needed to store the decoder's structure */
236 if( ( p_dec->p_sys = p_sys =
237 (decoder_sys_t *)malloc(sizeof(decoder_sys_t)) ) == NULL )
241 memset( p_sys, 0, sizeof(decoder_sys_t) );
243 p_dec->p_sys->p_context = p_context;
244 p_dec->p_sys->p_codec = p_codec;
245 p_dec->p_sys->i_codec_id = i_codec_id;
246 p_dec->p_sys->psz_namecodec = psz_namecodec;
247 p_sys->p_ff_pic = avcodec_alloc_frame();
249 /* ***** Fill p_context with init values ***** */
250 p_sys->p_context->codec_tag = ffmpeg_CodecTag( p_dec->fmt_in.i_codec );
251 p_sys->p_context->width = p_dec->fmt_in.video.i_width;
252 p_sys->p_context->height = p_dec->fmt_in.video.i_height;
253 p_sys->p_context->bits_per_sample = p_dec->fmt_in.video.i_bits_per_pixel;
255 /* ***** Get configuration of ffmpeg plugin ***** */
256 p_sys->p_context->workaround_bugs =
257 config_GetInt( p_dec, "ffmpeg-workaround-bugs" );
258 p_sys->p_context->error_resilience =
259 config_GetInt( p_dec, "ffmpeg-error-resilience" );
261 var_Create( p_dec, "grayscale", VLC_VAR_BOOL | VLC_VAR_DOINHERIT );
262 var_Get( p_dec, "grayscale", &val );
263 if( val.b_bool ) p_sys->p_context->flags |= CODEC_FLAG_GRAY;
265 var_Create( p_dec, "ffmpeg-vismv", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT );
266 var_Get( p_dec, "ffmpeg-vismv", &val );
267 if( val.i_int ) p_sys->p_context->debug_mv = val.i_int;
269 var_Create( p_dec, "ffmpeg-lowres", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT );
270 var_Get( p_dec, "ffmpeg-lowres", &val );
271 if( val.i_int > 0 && val.i_int <= 2 ) p_sys->p_context->lowres = val.i_int;
273 var_Create( p_dec, "ffmpeg-skiploopfilter",
274 VLC_VAR_INTEGER | VLC_VAR_DOINHERIT );
275 var_Get( p_dec, "ffmpeg-skiploopfilter", &val );
276 if( val.i_int > 0 ) p_sys->p_context->skip_loop_filter = AVDISCARD_NONREF;
277 if( val.i_int > 1 ) p_sys->p_context->skip_loop_filter = AVDISCARD_BIDIR;
278 if( val.i_int > 2 ) p_sys->p_context->skip_loop_filter = AVDISCARD_NONKEY;
279 if( val.i_int > 3 ) p_sys->p_context->skip_loop_filter = AVDISCARD_ALL;
281 /* ***** ffmpeg frame skipping ***** */
282 var_Create( p_dec, "ffmpeg-hurry-up", VLC_VAR_BOOL | VLC_VAR_DOINHERIT );
283 var_Get( p_dec, "ffmpeg-hurry-up", &val );
284 p_sys->b_hurry_up = val.b_bool;
286 var_Create( p_dec, "ffmpeg-skip-frame", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT );
287 var_Get( p_dec, "ffmpeg-skip-frame", &val );
291 p_sys->p_context->skip_frame = AVDISCARD_NONE;
294 p_sys->p_context->skip_frame = AVDISCARD_DEFAULT;
297 p_sys->p_context->skip_frame = AVDISCARD_BIDIR;
300 p_sys->p_context->skip_frame = AVDISCARD_NONKEY;
303 p_sys->p_context->skip_frame = AVDISCARD_ALL;
306 p_sys->p_context->skip_frame = AVDISCARD_NONE;
309 p_sys->i_skip_frame = p_sys->p_context->skip_frame;
311 var_Create( p_dec, "ffmpeg-skip-idct", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT );
312 var_Get( p_dec, "ffmpeg-skip-idct", &val );
316 p_sys->p_context->skip_idct = AVDISCARD_NONE;
319 p_sys->p_context->skip_idct = AVDISCARD_DEFAULT;
322 p_sys->p_context->skip_idct = AVDISCARD_BIDIR;
325 p_sys->p_context->skip_idct = AVDISCARD_NONKEY;
328 p_sys->p_context->skip_idct = AVDISCARD_ALL;
331 p_sys->p_context->skip_idct = AVDISCARD_NONE;
334 p_sys->i_skip_idct = p_sys->p_context->skip_idct;
336 /* ***** ffmpeg direct rendering ***** */
337 p_sys->b_direct_rendering = 0;
338 var_Create( p_dec, "ffmpeg-dr", VLC_VAR_BOOL | VLC_VAR_DOINHERIT );
339 var_Get( p_dec, "ffmpeg-dr", &val );
340 if( val.b_bool && (p_sys->p_codec->capabilities & CODEC_CAP_DR1) &&
341 /* Apparently direct rendering doesn't work with YUV422P */
342 p_sys->p_context->pix_fmt != PIX_FMT_YUV422P &&
343 /* H264 uses too many reference frames */
344 p_sys->i_codec_id != CODEC_ID_H264 &&
345 !p_sys->p_context->debug_mv )
347 /* Some codecs set pix_fmt only after the 1st frame has been decoded,
348 * so we need to do another check in ffmpeg_GetFrameBuf() */
349 p_sys->b_direct_rendering = 1;
352 /* ffmpeg doesn't properly release old pictures when frames are skipped */
353 //if( p_sys->b_hurry_up ) p_sys->b_direct_rendering = 0;
354 if( p_sys->b_direct_rendering )
356 msg_Dbg( p_dec, "using direct rendering" );
357 p_sys->p_context->flags |= CODEC_FLAG_EMU_EDGE;
360 /* Always use our get_buffer wrapper so we can calculate the
362 p_sys->p_context->get_buffer = ffmpeg_GetFrameBuf;
363 p_sys->p_context->reget_buffer = ffmpeg_ReGetFrameBuf;
364 p_sys->p_context->release_buffer = ffmpeg_ReleaseFrameBuf;
365 p_sys->p_context->opaque = p_dec;
367 /* ***** init this codec with special data ***** */
368 ffmpeg_InitCodec( p_dec );
370 /* ***** misc init ***** */
371 p_sys->input_pts = p_sys->input_dts = 0;
373 p_sys->b_has_b_frames = false;
374 p_sys->b_first_frame = true;
375 p_sys->i_late_frames = 0;
377 p_sys->i_buffer_orig = 1;
378 p_sys->p_buffer_orig = p_sys->p_buffer = malloc( p_sys->i_buffer_orig );
379 if( !p_sys->p_buffer_orig )
385 /* Set output properties */
386 p_dec->fmt_out.i_cat = VIDEO_ES;
387 p_dec->fmt_out.i_codec = ffmpeg_PixFmtToChroma( p_context->pix_fmt );
390 if( p_dec->fmt_in.video.p_palette )
391 p_sys->p_context->palctrl =
392 (AVPaletteControl *)p_dec->fmt_in.video.p_palette;
393 else if( p_sys->i_codec_id != CODEC_ID_MSVIDEO1 && p_sys->i_codec_id != CODEC_ID_CINEPAK )
394 p_sys->p_context->palctrl = &palette_control;
396 /* ***** Open the codec ***** */
397 vlc_mutex_t *lock = var_AcquireMutex( "avcodec" );
400 free( p_sys->p_buffer_orig );
405 if( avcodec_open( p_sys->p_context, p_sys->p_codec ) < 0 )
407 vlc_mutex_unlock( lock );
408 msg_Err( p_dec, "cannot open codec (%s)", p_sys->psz_namecodec );
409 free( p_sys->p_buffer_orig );
413 vlc_mutex_unlock( lock );
414 msg_Dbg( p_dec, "ffmpeg codec (%s) started", p_sys->psz_namecodec );
420 /*****************************************************************************
421 * DecodeVideo: Called to decode one or more frames
422 *****************************************************************************/
423 picture_t *DecodeVideo( decoder_t *p_dec, block_t **pp_block )
425 decoder_sys_t *p_sys = p_dec->p_sys;
427 int b_null_size = false;
430 if( !pp_block || !*pp_block ) return NULL;
432 if( !p_sys->p_context->extradata_size && p_dec->fmt_in.i_extra )
433 ffmpeg_InitCodec( p_dec );
437 if( p_block->i_flags & (BLOCK_FLAG_DISCONTINUITY|BLOCK_FLAG_CORRUPTED) )
440 p_sys->i_pts = 0; /* To make sure we recover properly */
442 p_sys->input_pts = p_sys->input_dts = 0;
443 p_sys->i_late_frames = 0;
445 block_Release( p_block );
447 //if( p_block->i_flags & BLOCK_FLAG_CORRUPTED )
448 //avcodec_flush_buffers( p_sys->p_context );
452 if( p_block->i_flags & BLOCK_FLAG_PREROLL )
454 /* Do not care about late frames when prerolling
455 * TODO avoid decoding of non reference frame
456 * (ie all B except for H264 where it depends only on nal_ref_idc) */
457 p_sys->i_late_frames = 0;
460 if( !p_dec->b_pace_control && (p_sys->i_late_frames > 0) &&
461 (mdate() - p_sys->i_late_frames_start > INT64_C(5000000)) )
465 msg_Err( p_dec, "more than 5 seconds of late video -> "
466 "dropping frame (computer too slow ?)" );
467 p_sys->i_pts = 0; /* To make sure we recover properly */
469 block_Release( p_block );
470 p_sys->i_late_frames--;
474 if( p_block->i_pts > 0 || p_block->i_dts > 0 )
476 p_sys->input_pts = p_block->i_pts;
477 p_sys->input_dts = p_block->i_dts;
479 /* Make sure we don't reuse the same timestamps twice */
480 p_block->i_pts = p_block->i_dts = 0;
483 /* A good idea could be to decode all I pictures and see for the other */
484 if( !p_dec->b_pace_control &&
486 (p_sys->i_late_frames > 4) )
489 if( p_sys->i_late_frames < 8 )
491 p_sys->p_context->skip_frame =
492 (p_sys->i_skip_frame <= AVDISCARD_BIDIR) ?
493 AVDISCARD_BIDIR : p_sys->i_skip_frame;
497 /* picture too late, won't decode
498 * but break picture until a new I, and for mpeg4 ...*/
499 p_sys->i_late_frames--; /* needed else it will never be decrease */
500 block_Release( p_block );
507 if( p_sys->b_hurry_up )
508 p_sys->p_context->skip_frame = p_sys->i_skip_frame;
509 if( !(p_block->i_flags & BLOCK_FLAG_PREROLL) )
515 if( p_sys->p_context->width <= 0 || p_sys->p_context->height <= 0 )
517 if( p_sys->b_hurry_up )
518 p_sys->p_context->skip_frame = p_sys->i_skip_frame;
523 * Do the actual decoding now
526 /* Don't forget that ffmpeg requires a little more bytes
527 * that the real frame size */
528 if( p_block->i_buffer > 0 )
530 p_sys->i_buffer = p_block->i_buffer;
531 if( p_sys->i_buffer + FF_INPUT_BUFFER_PADDING_SIZE >
532 p_sys->i_buffer_orig )
534 free( p_sys->p_buffer_orig );
535 p_sys->i_buffer_orig =
536 p_block->i_buffer + FF_INPUT_BUFFER_PADDING_SIZE;
537 p_sys->p_buffer_orig = malloc( p_sys->i_buffer_orig );
539 p_sys->p_buffer = p_sys->p_buffer_orig;
540 p_sys->i_buffer = p_block->i_buffer;
541 if( !p_sys->p_buffer )
543 block_Release( p_block );
546 vlc_memcpy( p_sys->p_buffer, p_block->p_buffer, p_block->i_buffer );
547 memset( p_sys->p_buffer + p_block->i_buffer, 0,
548 FF_INPUT_BUFFER_PADDING_SIZE );
550 p_block->i_buffer = 0;
553 while( p_sys->i_buffer > 0 )
555 int i_used, b_gotpicture;
558 i_used = avcodec_decode_video( p_sys->p_context, p_sys->p_ff_pic,
560 (uint8_t*)p_sys->p_buffer, p_sys->i_buffer );
561 if( b_null_size && p_sys->p_context->width > 0 &&
562 p_sys->p_context->height > 0 )
564 /* Reparse it to not drop the I frame */
566 if( p_sys->b_hurry_up )
567 p_sys->p_context->skip_frame = p_sys->i_skip_frame;
568 i_used = avcodec_decode_video( p_sys->p_context, p_sys->p_ff_pic,
570 (uint8_t*)p_sys->p_buffer, p_sys->i_buffer );
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;
596 /* Update frame late count (except when doing preroll) */
597 if( p_sys->i_pts && decoder_GetDisplayDate(p_dec, p_sys->i_pts) <= mdate() &&
598 !(p_block->i_flags & BLOCK_FLAG_PREROLL) )
600 p_sys->i_late_frames++;
601 if( p_sys->i_late_frames == 1 )
602 p_sys->i_late_frames_start = mdate();
606 p_sys->i_late_frames = 0;
609 if( !b_drawpicture || !p_sys->p_ff_pic->linesize[0] )
611 /* Do not display the picture */
612 p_pic = (picture_t *)p_sys->p_ff_pic->opaque;
613 if( !b_drawpicture && p_pic )
614 p_dec->pf_vout_buffer_del( p_dec, p_pic );
618 if( !p_sys->p_ff_pic->opaque )
620 /* Get a new picture */
621 p_pic = ffmpeg_NewPictBuf( p_dec, p_sys->p_context );
624 block_Release( p_block );
628 /* Fill p_picture_t from AVVideoFrame and do chroma conversion
630 ffmpeg_CopyPicture( p_dec, p_pic, p_sys->p_ff_pic );
634 p_pic = (picture_t *)p_sys->p_ff_pic->opaque;
638 if( p_sys->p_ff_pic->pts ) p_sys->i_pts = p_sys->p_ff_pic->pts;
640 /* Sanity check (seems to be needed for some streams) */
641 if( p_sys->p_ff_pic->pict_type == FF_B_TYPE )
643 p_sys->b_has_b_frames = true;
646 if( !p_dec->fmt_in.video.i_aspect )
648 /* Fetch again the aspect ratio in case it changed */
649 p_dec->fmt_out.video.i_aspect =
651 * ( av_q2d(p_sys->p_context->sample_aspect_ratio)
652 * p_sys->p_context->width / p_sys->p_context->height );
653 p_dec->fmt_out.video.i_sar_num
654 = p_sys->p_context->sample_aspect_ratio.num;
655 p_dec->fmt_out.video.i_sar_den
656 = p_sys->p_context->sample_aspect_ratio.den;
658 if( p_dec->fmt_out.video.i_aspect == 0 )
660 p_dec->fmt_out.video.i_aspect = VOUT_ASPECT_FACTOR
661 * p_sys->p_context->width / p_sys->p_context->height;
665 /* Send decoded frame to vout */
668 p_pic->date = p_sys->i_pts;
670 /* interpolate the next PTS */
671 if( p_dec->fmt_in.video.i_frame_rate > 0 &&
672 p_dec->fmt_in.video.i_frame_rate_base > 0 )
674 p_sys->i_pts += INT64_C(1000000) *
675 (2 + p_sys->p_ff_pic->repeat_pict) *
676 p_dec->fmt_in.video.i_frame_rate_base *
677 p_block->i_rate / INPUT_RATE_DEFAULT /
678 (2 * p_dec->fmt_in.video.i_frame_rate);
680 else if( p_sys->p_context->time_base.den > 0 )
682 p_sys->i_pts += INT64_C(1000000) *
683 (2 + p_sys->p_ff_pic->repeat_pict) *
684 p_sys->p_context->time_base.num *
685 p_block->i_rate / INPUT_RATE_DEFAULT /
686 (2 * p_sys->p_context->time_base.den);
689 if( p_sys->b_first_frame )
691 /* Hack to force display of still pictures */
692 p_sys->b_first_frame = false;
693 p_pic->b_force = true;
696 p_pic->i_nb_fields = 2 + p_sys->p_ff_pic->repeat_pict;
697 p_pic->b_progressive = !p_sys->p_ff_pic->interlaced_frame;
698 p_pic->b_top_field_first = p_sys->p_ff_pic->top_field_first;
704 p_dec->pf_vout_buffer_del( p_dec, p_pic );
708 block_Release( p_block );
712 /*****************************************************************************
713 * EndVideo: decoder destruction
714 *****************************************************************************
715 * This function is called when the thread ends after a successful
717 *****************************************************************************/
718 void EndVideoDec( decoder_t *p_dec )
720 decoder_sys_t *p_sys = p_dec->p_sys;
722 if( p_sys->p_ff_pic ) av_free( p_sys->p_ff_pic );
723 free( p_sys->p_buffer_orig );
726 /*****************************************************************************
727 * ffmpeg_InitCodec: setup codec extra initialization data for ffmpeg
728 *****************************************************************************/
729 static void ffmpeg_InitCodec( decoder_t *p_dec )
731 decoder_sys_t *p_sys = p_dec->p_sys;
732 int i_size = p_dec->fmt_in.i_extra;
734 if( !i_size ) return;
736 if( p_sys->i_codec_id == CODEC_ID_SVQ3 )
740 p_sys->p_context->extradata_size = i_size + 12;
741 p = p_sys->p_context->extradata =
742 malloc( p_sys->p_context->extradata_size );
746 memcpy( &p[0], "SVQ3", 4 );
747 memset( &p[4], 0, 8 );
748 memcpy( &p[12], p_dec->fmt_in.p_extra, i_size );
750 /* Now remove all atoms before the SMI one */
751 if( p_sys->p_context->extradata_size > 0x5a &&
752 strncmp( (char*)&p[0x56], "SMI ", 4 ) )
754 uint8_t *psz = &p[0x52];
756 while( psz < &p[p_sys->p_context->extradata_size - 8] )
758 int i_size = GetDWBE( psz );
761 /* FIXME handle 1 as long size */
764 if( !strncmp( (char*)&psz[4], "SMI ", 4 ) )
766 memmove( &p[0x52], psz,
767 &p[p_sys->p_context->extradata_size] - psz );
775 else if( p_dec->fmt_in.i_codec == VLC_FOURCC( 'R', 'V', '1', '0' ) ||
776 p_dec->fmt_in.i_codec == VLC_FOURCC( 'R', 'V', '1', '3' ) ||
777 p_dec->fmt_in.i_codec == VLC_FOURCC( 'R', 'V', '2', '0' ) )
779 if( p_dec->fmt_in.i_extra == 8 )
781 p_sys->p_context->extradata_size = 8;
782 p_sys->p_context->extradata = malloc( 8 );
783 if( p_sys->p_context->extradata )
785 memcpy( p_sys->p_context->extradata,
786 p_dec->fmt_in.p_extra, p_dec->fmt_in.i_extra );
787 p_sys->p_context->sub_id = ((uint32_t*)p_dec->fmt_in.p_extra)[1];
789 msg_Warn( p_dec, "using extra data for RV codec sub_id=%08x",
790 p_sys->p_context->sub_id );
796 p_sys->p_context->extradata_size = i_size;
797 p_sys->p_context->extradata =
798 malloc( i_size + FF_INPUT_BUFFER_PADDING_SIZE );
799 if( p_sys->p_context->extradata )
801 memcpy( p_sys->p_context->extradata,
802 p_dec->fmt_in.p_extra, i_size );
803 memset( &((uint8_t*)p_sys->p_context->extradata)[i_size],
804 0, FF_INPUT_BUFFER_PADDING_SIZE );
809 /*****************************************************************************
810 * ffmpeg_CopyPicture: copy a picture from ffmpeg internal buffers to a
811 * picture_t structure (when not in direct rendering mode).
812 *****************************************************************************/
813 static void ffmpeg_CopyPicture( decoder_t *p_dec,
814 picture_t *p_pic, AVFrame *p_ff_pic )
816 decoder_sys_t *p_sys = p_dec->p_sys;
818 if( ffmpeg_PixFmtToChroma( p_sys->p_context->pix_fmt ) )
820 int i_plane, i_size, i_line;
821 uint8_t *p_dst, *p_src;
822 int i_src_stride, i_dst_stride;
824 for( i_plane = 0; i_plane < p_pic->i_planes; i_plane++ )
826 p_src = p_ff_pic->data[i_plane];
827 p_dst = p_pic->p[i_plane].p_pixels;
828 i_src_stride = p_ff_pic->linesize[i_plane];
829 i_dst_stride = p_pic->p[i_plane].i_pitch;
831 i_size = __MIN( i_src_stride, i_dst_stride );
832 for( i_line = 0; i_line < p_pic->p[i_plane].i_visible_lines;
835 vlc_memcpy( p_dst, p_src, i_size );
836 p_src += i_src_stride;
837 p_dst += i_dst_stride;
846 /* we need to convert to I420 */
847 switch( p_sys->p_context->pix_fmt )
849 case PIX_FMT_YUV410P:
850 case PIX_FMT_YUV411P:
853 #if defined(PIX_FMT_RGB8)
856 #if defined(PIX_FMT_BRG32)
860 #if defined(PIX_FMT_BGR8)
864 for( i = 0; i < p_pic->i_planes; i++ )
866 dest_pic.data[i] = p_pic->p[i].p_pixels;
867 dest_pic.linesize[i] = p_pic->p[i].i_pitch;
869 #if !defined(HAVE_LIBSWSCALE_SWSCALE_H) && !defined(HAVE_FFMPEG_SWSCALE_H)
870 img_convert( &dest_pic, PIX_FMT_YUV420P,
871 (AVPicture *)p_ff_pic,
872 p_sys->p_context->pix_fmt,
873 p_sys->p_context->width,
874 p_sys->p_context->height );
878 msg_Err( p_dec, "don't know how to convert chroma %i",
879 p_sys->p_context->pix_fmt );
886 /*****************************************************************************
887 * ffmpeg_GetFrameBuf: callback used by ffmpeg to get a frame buffer.
888 *****************************************************************************
889 * It is used for direct rendering as well as to get the right PTS for each
890 * decoded picture (even in indirect rendering mode).
891 *****************************************************************************/
892 static void ffmpeg_SetFrameBufferPts( decoder_t *p_dec, AVFrame *p_ff_pic );
894 static int ffmpeg_GetFrameBuf( struct AVCodecContext *p_context,
897 decoder_t *p_dec = (decoder_t *)p_context->opaque;
898 decoder_sys_t *p_sys = p_dec->p_sys;
901 /* Set picture PTS */
902 ffmpeg_SetFrameBufferPts( p_dec, p_ff_pic );
905 p_ff_pic->opaque = 0;
907 /* Not much to do in indirect rendering mode */
908 if( !p_sys->b_direct_rendering )
910 return avcodec_default_get_buffer( p_context, p_ff_pic );
913 /* Some codecs set pix_fmt only after the 1st frame has been decoded,
914 * so this check is necessary. */
915 if( !ffmpeg_PixFmtToChroma( p_context->pix_fmt ) ||
916 p_sys->p_context->width % 16 || p_sys->p_context->height % 16 )
918 msg_Dbg( p_dec, "disabling direct rendering" );
919 p_sys->b_direct_rendering = 0;
920 return avcodec_default_get_buffer( p_context, p_ff_pic );
923 /* Get a new picture */
924 //p_sys->p_vout->render.b_allow_modify_pics = 0;
925 p_pic = ffmpeg_NewPictBuf( p_dec, p_sys->p_context );
928 p_sys->b_direct_rendering = 0;
929 return avcodec_default_get_buffer( p_context, p_ff_pic );
931 p_sys->p_context->draw_horiz_band = NULL;
933 p_ff_pic->opaque = (void*)p_pic;
934 p_ff_pic->type = FF_BUFFER_TYPE_USER;
935 p_ff_pic->data[0] = p_pic->p[0].p_pixels;
936 p_ff_pic->data[1] = p_pic->p[1].p_pixels;
937 p_ff_pic->data[2] = p_pic->p[2].p_pixels;
938 p_ff_pic->data[3] = NULL; /* alpha channel but I'm not sure */
940 p_ff_pic->linesize[0] = p_pic->p[0].i_pitch;
941 p_ff_pic->linesize[1] = p_pic->p[1].i_pitch;
942 p_ff_pic->linesize[2] = p_pic->p[2].i_pitch;
943 p_ff_pic->linesize[3] = 0;
945 if( p_ff_pic->reference != 0 )
947 p_dec->pf_picture_link( p_dec, p_pic );
950 /* FIXME what is that, should give good value */
951 p_ff_pic->age = 256*256*256*64; // FIXME FIXME from ffmpeg
955 static int ffmpeg_ReGetFrameBuf( struct AVCodecContext *p_context, AVFrame *p_ff_pic )
957 decoder_t *p_dec = (decoder_t *)p_context->opaque;
959 /* Set picture PTS */
960 ffmpeg_SetFrameBufferPts( p_dec, p_ff_pic );
962 /* We always use default reget function, it works perfectly fine */
963 return avcodec_default_reget_buffer( p_context, p_ff_pic );
966 static void ffmpeg_SetFrameBufferPts( decoder_t *p_dec, AVFrame *p_ff_pic )
968 decoder_sys_t *p_sys = p_dec->p_sys;
970 /* Set picture PTS */
971 if( p_sys->input_pts )
973 p_ff_pic->pts = p_sys->input_pts;
975 else if( p_sys->input_dts )
977 /* Some demuxers only set the dts so let's try to find a useful
978 * timestamp from this */
979 if( !p_sys->p_context->has_b_frames || !p_sys->b_has_b_frames ||
980 !p_ff_pic->reference || !p_sys->i_pts )
982 p_ff_pic->pts = p_sys->input_dts;
984 else p_ff_pic->pts = 0;
986 else p_ff_pic->pts = 0;
988 if( p_sys->i_pts ) /* make sure 1st frame has a pts > 0 */
990 p_sys->input_pts = p_sys->input_dts = 0;
994 static void ffmpeg_ReleaseFrameBuf( struct AVCodecContext *p_context,
997 decoder_t *p_dec = (decoder_t *)p_context->opaque;
1000 if( !p_ff_pic->opaque )
1002 avcodec_default_release_buffer( p_context, p_ff_pic );
1006 p_pic = (picture_t*)p_ff_pic->opaque;
1008 p_ff_pic->data[0] = NULL;
1009 p_ff_pic->data[1] = NULL;
1010 p_ff_pic->data[2] = NULL;
1011 p_ff_pic->data[3] = NULL;
1013 if( p_ff_pic->reference != 0 )
1015 p_dec->pf_picture_unlink( p_dec, p_pic );