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>
49 /*****************************************************************************
50 * decoder_sys_t : decoder descriptor
51 *****************************************************************************/
56 /* Video decoder specific part */
62 BITMAPINFOHEADER *p_format;
64 /* for frame skipping algo */
66 enum AVDiscard i_skip_frame;
67 enum AVDiscard i_skip_idct;
69 /* how many decoded frames are late */
71 mtime_t i_late_frames_start;
73 /* for direct rendering */
74 int b_direct_rendering;
78 /* Hack to force display of still pictures */
81 int i_buffer_orig, i_buffer;
82 char *p_buffer_orig, *p_buffer;
85 /* FIXME (dummy palette for now) */
86 static AVPaletteControl palette_control;
88 /*****************************************************************************
90 *****************************************************************************/
91 static void ffmpeg_InitCodec ( decoder_t * );
92 static void ffmpeg_CopyPicture ( decoder_t *, picture_t *, AVFrame * );
93 static int ffmpeg_GetFrameBuf ( struct AVCodecContext *, AVFrame * );
94 static void ffmpeg_ReleaseFrameBuf( struct AVCodecContext *, AVFrame * );
96 static uint32_t ffmpeg_CodecTag( vlc_fourcc_t fcc )
98 uint8_t *p = (uint8_t*)&fcc;
99 return p[0] | (p[1] << 8) | (p[2] << 16) | (p[3] << 24);
102 /*****************************************************************************
104 *****************************************************************************/
105 static uint32_t ffmpeg_PixFmtToChroma( int i_ff_chroma )
107 switch( i_ff_chroma )
109 case PIX_FMT_YUV420P:
110 case PIX_FMT_YUVJ420P: /* Hacky but better then chroma conversion */
111 return VLC_FOURCC('I','4','2','0');
112 case PIX_FMT_YUV422P:
113 case PIX_FMT_YUVJ422P: /* Hacky but better then chroma conversion */
114 return VLC_FOURCC('I','4','2','2');
115 case PIX_FMT_YUV444P:
116 case PIX_FMT_YUVJ444P: /* Hacky but better then chroma conversion */
117 return VLC_FOURCC('I','4','4','4');
120 return VLC_FOURCC('Y','U','Y','2');
122 #if defined(WORDS_BIGENDIAN)
124 return VLC_FOURCC('R','G','B','8');
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 #if defined(PIX_FMT_RGB8)
134 return VLC_FOURCC('R','G','B','8');
137 return VLC_FOURCC('R','V','1','5');
139 return VLC_FOURCC('R','V','1','6');
141 return VLC_FOURCC('R','V','2','4');
144 return VLC_FOURCC('R','V','3','2');
147 return VLC_FOURCC('R','G','B','A');
150 return VLC_FOURCC('G','R','E','Y');
152 case PIX_FMT_YUV410P:
153 case PIX_FMT_YUV411P:
159 /* Returns a new picture buffer */
160 static inline picture_t *ffmpeg_NewPictBuf( decoder_t *p_dec,
161 AVCodecContext *p_context )
165 p_dec->fmt_out.video.i_width = p_context->width;
166 p_dec->fmt_out.video.i_height = p_context->height;
167 p_dec->fmt_out.i_codec = ffmpeg_PixFmtToChroma( p_context->pix_fmt );
169 if( !p_context->width || !p_context->height )
171 return NULL; /* invalid display size */
174 if( !p_dec->fmt_out.i_codec )
176 /* we make conversion if possible*/
177 p_dec->fmt_out.i_codec = VLC_FOURCC('I','4','2','0');
180 /* If an aspect-ratio was specified in the input format then force it */
181 if( p_dec->fmt_in.video.i_aspect )
183 p_dec->fmt_out.video.i_aspect = p_dec->fmt_in.video.i_aspect;
187 p_dec->fmt_out.video.i_aspect =
188 VOUT_ASPECT_FACTOR * ( av_q2d(p_context->sample_aspect_ratio) *
189 p_context->width / p_context->height );
190 p_dec->fmt_out.video.i_sar_num = p_context->sample_aspect_ratio.num;
191 p_dec->fmt_out.video.i_sar_den = p_context->sample_aspect_ratio.den;
193 if( p_dec->fmt_out.video.i_aspect == 0 )
195 p_dec->fmt_out.video.i_aspect =
196 VOUT_ASPECT_FACTOR * p_context->width / p_context->height;
200 if( p_dec->fmt_out.video.i_frame_rate > 0 &&
201 p_dec->fmt_out.video.i_frame_rate_base > 0 )
203 p_dec->fmt_out.video.i_frame_rate =
204 p_dec->fmt_in.video.i_frame_rate;
205 p_dec->fmt_out.video.i_frame_rate_base =
206 p_dec->fmt_in.video.i_frame_rate_base;
208 else if( p_context->time_base.num > 0 && p_context->time_base.den > 0 )
210 p_dec->fmt_out.video.i_frame_rate = p_context->time_base.den;
211 p_dec->fmt_out.video.i_frame_rate_base = p_context->time_base.num;
214 p_pic = p_dec->pf_vout_buffer_new( p_dec );
219 /*****************************************************************************
220 * InitVideo: initialize the video decoder
221 *****************************************************************************
222 * the ffmpeg codec will be opened, some memory allocated. The vout is not yet
223 * opened (done after the first decoded frame).
224 *****************************************************************************/
225 int InitVideoDec( decoder_t *p_dec, AVCodecContext *p_context,
226 AVCodec *p_codec, int i_codec_id, const char *psz_namecodec )
228 decoder_sys_t *p_sys;
231 /* Allocate the memory needed to store the decoder's structure */
232 if( ( p_dec->p_sys = p_sys =
233 (decoder_sys_t *)malloc(sizeof(decoder_sys_t)) ) == NULL )
237 memset( p_sys, 0, sizeof(decoder_sys_t) );
239 p_dec->p_sys->p_context = p_context;
240 p_dec->p_sys->p_codec = p_codec;
241 p_dec->p_sys->i_codec_id = i_codec_id;
242 p_dec->p_sys->psz_namecodec = psz_namecodec;
243 p_sys->p_ff_pic = avcodec_alloc_frame();
245 /* ***** Fill p_context with init values ***** */
246 p_sys->p_context->codec_tag = ffmpeg_CodecTag( p_dec->fmt_in.i_codec );
247 p_sys->p_context->width = p_dec->fmt_in.video.i_width;
248 p_sys->p_context->height = p_dec->fmt_in.video.i_height;
249 p_sys->p_context->bits_per_sample = p_dec->fmt_in.video.i_bits_per_pixel;
251 /* ***** Get configuration of ffmpeg plugin ***** */
252 p_sys->p_context->workaround_bugs =
253 config_GetInt( p_dec, "ffmpeg-workaround-bugs" );
254 p_sys->p_context->error_resilience =
255 config_GetInt( p_dec, "ffmpeg-error-resilience" );
257 var_Create( p_dec, "grayscale", VLC_VAR_BOOL | VLC_VAR_DOINHERIT );
258 var_Get( p_dec, "grayscale", &val );
259 if( val.b_bool ) p_sys->p_context->flags |= CODEC_FLAG_GRAY;
261 var_Create( p_dec, "ffmpeg-vismv", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT );
262 var_Get( p_dec, "ffmpeg-vismv", &val );
263 if( val.i_int ) p_sys->p_context->debug_mv = val.i_int;
265 var_Create( p_dec, "ffmpeg-lowres", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT );
266 var_Get( p_dec, "ffmpeg-lowres", &val );
267 if( val.i_int > 0 && val.i_int <= 2 ) p_sys->p_context->lowres = val.i_int;
269 var_Create( p_dec, "ffmpeg-skiploopfilter",
270 VLC_VAR_INTEGER | VLC_VAR_DOINHERIT );
271 var_Get( p_dec, "ffmpeg-skiploopfilter", &val );
272 if( val.i_int > 0 ) p_sys->p_context->skip_loop_filter = AVDISCARD_NONREF;
273 if( val.i_int > 1 ) p_sys->p_context->skip_loop_filter = AVDISCARD_BIDIR;
274 if( val.i_int > 2 ) p_sys->p_context->skip_loop_filter = AVDISCARD_NONKEY;
275 if( val.i_int > 3 ) p_sys->p_context->skip_loop_filter = AVDISCARD_ALL;
277 /* ***** ffmpeg frame skipping ***** */
278 var_Create( p_dec, "ffmpeg-hurry-up", VLC_VAR_BOOL | VLC_VAR_DOINHERIT );
279 var_Get( p_dec, "ffmpeg-hurry-up", &val );
280 p_sys->b_hurry_up = val.b_bool;
282 var_Create( p_dec, "ffmpeg-skip-frame", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT );
283 var_Get( p_dec, "ffmpeg-skip-frame", &val );
287 p_sys->p_context->skip_frame = AVDISCARD_NONE;
290 p_sys->p_context->skip_frame = AVDISCARD_DEFAULT;
293 p_sys->p_context->skip_frame = AVDISCARD_BIDIR;
296 p_sys->p_context->skip_frame = AVDISCARD_NONKEY;
299 p_sys->p_context->skip_frame = AVDISCARD_ALL;
302 p_sys->p_context->skip_frame = AVDISCARD_NONE;
305 p_sys->i_skip_frame = p_sys->p_context->skip_frame;
307 var_Create( p_dec, "ffmpeg-skip-idct", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT );
308 var_Get( p_dec, "ffmpeg-skip-idct", &val );
312 p_sys->p_context->skip_idct = AVDISCARD_NONE;
315 p_sys->p_context->skip_idct = AVDISCARD_DEFAULT;
318 p_sys->p_context->skip_idct = AVDISCARD_BIDIR;
321 p_sys->p_context->skip_idct = AVDISCARD_NONKEY;
324 p_sys->p_context->skip_idct = AVDISCARD_ALL;
327 p_sys->p_context->skip_idct = AVDISCARD_NONE;
330 p_sys->i_skip_idct = p_sys->p_context->skip_idct;
332 /* ***** ffmpeg direct rendering ***** */
333 p_sys->b_direct_rendering = 0;
334 var_Create( p_dec, "ffmpeg-dr", VLC_VAR_BOOL | VLC_VAR_DOINHERIT );
335 var_Get( p_dec, "ffmpeg-dr", &val );
336 if( val.b_bool && (p_sys->p_codec->capabilities & CODEC_CAP_DR1) &&
337 /* Apparently direct rendering doesn't work with YUV422P */
338 p_sys->p_context->pix_fmt != PIX_FMT_YUV422P &&
339 /* H264 uses too many reference frames */
340 p_sys->i_codec_id != CODEC_ID_H264 &&
341 !p_sys->p_context->debug_mv )
343 /* Some codecs set pix_fmt only after the 1st frame has been decoded,
344 * so we need to do another check in ffmpeg_GetFrameBuf() */
345 p_sys->b_direct_rendering = 1;
348 /* ffmpeg doesn't properly release old pictures when frames are skipped */
349 //if( p_sys->b_hurry_up ) p_sys->b_direct_rendering = 0;
350 if( p_sys->b_direct_rendering )
352 msg_Dbg( p_dec, "using direct rendering" );
353 p_sys->p_context->flags |= CODEC_FLAG_EMU_EDGE;
356 /* Always use our get_buffer wrapper so we can calculate the
358 p_sys->p_context->get_buffer = ffmpeg_GetFrameBuf;
359 p_sys->p_context->release_buffer = ffmpeg_ReleaseFrameBuf;
360 p_sys->p_context->opaque = p_dec;
362 /* ***** init this codec with special data ***** */
363 ffmpeg_InitCodec( p_dec );
365 /* ***** misc init ***** */
366 p_sys->input_pts = p_sys->input_dts = 0;
368 p_sys->b_has_b_frames = false;
369 p_sys->b_first_frame = true;
370 p_sys->i_late_frames = 0;
372 p_sys->i_buffer_orig = 1;
373 p_sys->p_buffer_orig = p_sys->p_buffer = malloc( p_sys->i_buffer_orig );
374 if( !p_sys->p_buffer_orig )
380 /* Set output properties */
381 p_dec->fmt_out.i_cat = VIDEO_ES;
382 p_dec->fmt_out.i_codec = ffmpeg_PixFmtToChroma( p_context->pix_fmt );
385 if( p_dec->fmt_in.video.p_palette )
386 p_sys->p_context->palctrl =
387 (AVPaletteControl *)p_dec->fmt_in.video.p_palette;
389 p_sys->p_context->palctrl = &palette_control;
391 /* ***** Open the codec ***** */
392 vlc_mutex_t *lock = var_AcquireMutex( "avcodec" );
395 free( p_sys->p_buffer_orig );
400 if( avcodec_open( p_sys->p_context, p_sys->p_codec ) < 0 )
402 vlc_mutex_unlock( lock );
403 msg_Err( p_dec, "cannot open codec (%s)", p_sys->psz_namecodec );
404 free( p_sys->p_buffer_orig );
408 vlc_mutex_unlock( lock );
409 msg_Dbg( p_dec, "ffmpeg codec (%s) started", p_sys->psz_namecodec );
415 /*****************************************************************************
416 * DecodeVideo: Called to decode one or more frames
417 *****************************************************************************/
418 picture_t *DecodeVideo( decoder_t *p_dec, block_t **pp_block )
420 decoder_sys_t *p_sys = p_dec->p_sys;
422 int b_null_size = false;
425 if( !pp_block || !*pp_block ) return NULL;
427 if( !p_sys->p_context->extradata_size && p_dec->fmt_in.i_extra )
428 ffmpeg_InitCodec( p_dec );
432 if( p_block->i_flags & (BLOCK_FLAG_DISCONTINUITY|BLOCK_FLAG_CORRUPTED) )
435 p_sys->i_pts = 0; /* To make sure we recover properly */
437 p_sys->input_pts = p_sys->input_dts = 0;
438 p_sys->i_late_frames = 0;
440 block_Release( p_block );
442 //if( p_block->i_flags & BLOCK_FLAG_CORRUPTED )
443 //avcodec_flush_buffers( p_sys->p_context );
447 if( p_block->i_flags & BLOCK_FLAG_PREROLL )
449 /* Do not care about late frames when prerolling
450 * TODO avoid decoding of non reference frame
451 * (ie all B except for H264 where it depends only on nal_ref_idc) */
452 p_sys->i_late_frames = 0;
455 if( !p_dec->b_pace_control && (p_sys->i_late_frames > 0) &&
456 (mdate() - p_sys->i_late_frames_start > INT64_C(5000000)) )
460 msg_Err( p_dec, "more than 5 seconds of late video -> "
461 "dropping frame (computer too slow ?)" );
462 p_sys->i_pts = 0; /* To make sure we recover properly */
464 block_Release( p_block );
465 p_sys->i_late_frames--;
469 if( p_block->i_pts > 0 || p_block->i_dts > 0 )
471 p_sys->input_pts = p_block->i_pts;
472 p_sys->input_dts = p_block->i_dts;
474 /* Make sure we don't reuse the same timestamps twice */
475 p_block->i_pts = p_block->i_dts = 0;
478 /* A good idea could be to decode all I pictures and see for the other */
479 if( !p_dec->b_pace_control &&
481 (p_sys->i_late_frames > 4) )
484 if( p_sys->i_late_frames < 8 )
486 p_sys->p_context->skip_frame =
487 (p_sys->i_skip_frame <= AVDISCARD_BIDIR) ?
488 AVDISCARD_BIDIR : p_sys->i_skip_frame;
492 /* picture too late, won't decode
493 * but break picture until a new I, and for mpeg4 ...*/
494 p_sys->i_late_frames--; /* needed else it will never be decrease */
495 block_Release( p_block );
502 if( p_sys->b_hurry_up )
503 p_sys->p_context->skip_frame = p_sys->i_skip_frame;
504 if( !(p_block->i_flags & BLOCK_FLAG_PREROLL) )
510 if( p_sys->p_context->width <= 0 || p_sys->p_context->height <= 0 )
512 if( p_sys->b_hurry_up )
513 p_sys->p_context->skip_frame = p_sys->i_skip_frame;
518 * Do the actual decoding now
521 /* Don't forget that ffmpeg requires a little more bytes
522 * that the real frame size */
523 if( p_block->i_buffer > 0 )
525 p_sys->i_buffer = p_block->i_buffer;
526 if( p_sys->i_buffer + FF_INPUT_BUFFER_PADDING_SIZE >
527 p_sys->i_buffer_orig )
529 free( p_sys->p_buffer_orig );
530 p_sys->i_buffer_orig =
531 p_block->i_buffer + FF_INPUT_BUFFER_PADDING_SIZE;
532 p_sys->p_buffer_orig = malloc( p_sys->i_buffer_orig );
534 p_sys->p_buffer = p_sys->p_buffer_orig;
535 p_sys->i_buffer = p_block->i_buffer;
536 if( !p_sys->p_buffer )
538 block_Release( p_block );
541 vlc_memcpy( p_sys->p_buffer, p_block->p_buffer, p_block->i_buffer );
542 memset( p_sys->p_buffer + p_block->i_buffer, 0,
543 FF_INPUT_BUFFER_PADDING_SIZE );
545 p_block->i_buffer = 0;
548 while( p_sys->i_buffer > 0 )
550 int i_used, b_gotpicture;
553 i_used = avcodec_decode_video( p_sys->p_context, p_sys->p_ff_pic,
555 (uint8_t*)p_sys->p_buffer, p_sys->i_buffer );
556 if( b_null_size && p_sys->p_context->width > 0 &&
557 p_sys->p_context->height > 0 )
559 /* Reparse it to not drop the I frame */
561 if( p_sys->b_hurry_up )
562 p_sys->p_context->skip_frame = p_sys->i_skip_frame;
563 i_used = avcodec_decode_video( p_sys->p_context, p_sys->p_ff_pic,
565 (uint8_t*)p_sys->p_buffer, p_sys->i_buffer );
570 msg_Warn( p_dec, "cannot decode one frame (%d bytes)",
572 block_Release( p_block );
575 else if( i_used > p_sys->i_buffer )
577 i_used = p_sys->i_buffer;
581 p_sys->i_buffer -= i_used;
582 p_sys->p_buffer += i_used;
584 /* Nothing to display */
587 if( i_used == 0 ) break;
591 /* Update frame late count (except when doing preroll) */
592 if( p_sys->i_pts && decoder_GetDisplayDate(p_dec, p_sys->i_pts) <= mdate() &&
593 !(p_block->i_flags & BLOCK_FLAG_PREROLL) )
595 p_sys->i_late_frames++;
596 if( p_sys->i_late_frames == 1 )
597 p_sys->i_late_frames_start = mdate();
601 p_sys->i_late_frames = 0;
604 if( !b_drawpicture || !p_sys->p_ff_pic->linesize[0] )
606 /* Do not display the picture */
607 p_pic = (picture_t *)p_sys->p_ff_pic->opaque;
608 if( !b_drawpicture && p_pic )
609 p_dec->pf_vout_buffer_del( p_dec, p_pic );
613 if( !p_sys->p_ff_pic->opaque )
615 /* Get a new picture */
616 p_pic = ffmpeg_NewPictBuf( p_dec, p_sys->p_context );
619 block_Release( p_block );
623 /* Fill p_picture_t from AVVideoFrame and do chroma conversion
625 ffmpeg_CopyPicture( p_dec, p_pic, p_sys->p_ff_pic );
629 p_pic = (picture_t *)p_sys->p_ff_pic->opaque;
633 if( p_sys->p_ff_pic->pts ) p_sys->i_pts = p_sys->p_ff_pic->pts;
635 /* Sanity check (seems to be needed for some streams) */
636 if( p_sys->p_ff_pic->pict_type == FF_B_TYPE )
638 p_sys->b_has_b_frames = true;
641 if( !p_dec->fmt_in.video.i_aspect )
643 /* Fetch again the aspect ratio in case it changed */
644 p_dec->fmt_out.video.i_aspect =
646 * ( av_q2d(p_sys->p_context->sample_aspect_ratio)
647 * p_sys->p_context->width / p_sys->p_context->height );
648 p_dec->fmt_out.video.i_sar_num
649 = p_sys->p_context->sample_aspect_ratio.num;
650 p_dec->fmt_out.video.i_sar_den
651 = p_sys->p_context->sample_aspect_ratio.den;
653 if( p_dec->fmt_out.video.i_aspect == 0 )
655 p_dec->fmt_out.video.i_aspect = VOUT_ASPECT_FACTOR
656 * p_sys->p_context->width / p_sys->p_context->height;
660 /* Send decoded frame to vout */
663 p_pic->date = p_sys->i_pts;
665 /* interpolate the next PTS */
666 if( p_dec->fmt_in.video.i_frame_rate > 0 &&
667 p_dec->fmt_in.video.i_frame_rate_base > 0 )
669 p_sys->i_pts += INT64_C(1000000) *
670 (2 + p_sys->p_ff_pic->repeat_pict) *
671 p_dec->fmt_in.video.i_frame_rate_base *
672 p_block->i_rate / INPUT_RATE_DEFAULT /
673 (2 * p_dec->fmt_in.video.i_frame_rate);
675 else if( p_sys->p_context->time_base.den > 0 )
677 p_sys->i_pts += INT64_C(1000000) *
678 (2 + p_sys->p_ff_pic->repeat_pict) *
679 p_sys->p_context->time_base.num *
680 p_block->i_rate / INPUT_RATE_DEFAULT /
681 (2 * p_sys->p_context->time_base.den);
684 if( p_sys->b_first_frame )
686 /* Hack to force display of still pictures */
687 p_sys->b_first_frame = false;
688 p_pic->b_force = true;
691 p_pic->i_nb_fields = 2 + p_sys->p_ff_pic->repeat_pict;
692 p_pic->b_progressive = !p_sys->p_ff_pic->interlaced_frame;
693 p_pic->b_top_field_first = p_sys->p_ff_pic->top_field_first;
699 p_dec->pf_vout_buffer_del( p_dec, p_pic );
703 block_Release( p_block );
707 /*****************************************************************************
708 * EndVideo: decoder destruction
709 *****************************************************************************
710 * This function is called when the thread ends after a successful
712 *****************************************************************************/
713 void EndVideoDec( decoder_t *p_dec )
715 decoder_sys_t *p_sys = p_dec->p_sys;
717 if( p_sys->p_ff_pic ) av_free( p_sys->p_ff_pic );
718 free( p_sys->p_buffer_orig );
721 /*****************************************************************************
722 * ffmpeg_InitCodec: setup codec extra initialization data for ffmpeg
723 *****************************************************************************/
724 static void ffmpeg_InitCodec( decoder_t *p_dec )
726 decoder_sys_t *p_sys = p_dec->p_sys;
727 int i_size = p_dec->fmt_in.i_extra;
729 if( !i_size ) return;
731 if( p_sys->i_codec_id == CODEC_ID_SVQ3 )
735 p_sys->p_context->extradata_size = i_size + 12;
736 p = p_sys->p_context->extradata =
737 malloc( p_sys->p_context->extradata_size );
741 memcpy( &p[0], "SVQ3", 4 );
742 memset( &p[4], 0, 8 );
743 memcpy( &p[12], p_dec->fmt_in.p_extra, i_size );
745 /* Now remove all atoms before the SMI one */
746 if( p_sys->p_context->extradata_size > 0x5a &&
747 strncmp( (char*)&p[0x56], "SMI ", 4 ) )
749 uint8_t *psz = &p[0x52];
751 while( psz < &p[p_sys->p_context->extradata_size - 8] )
753 int i_size = GetDWBE( psz );
756 /* FIXME handle 1 as long size */
759 if( !strncmp( (char*)&psz[4], "SMI ", 4 ) )
761 memmove( &p[0x52], psz,
762 &p[p_sys->p_context->extradata_size] - psz );
770 else if( p_dec->fmt_in.i_codec == VLC_FOURCC( 'R', 'V', '1', '0' ) ||
771 p_dec->fmt_in.i_codec == VLC_FOURCC( 'R', 'V', '1', '3' ) ||
772 p_dec->fmt_in.i_codec == VLC_FOURCC( 'R', 'V', '2', '0' ) )
774 if( p_dec->fmt_in.i_extra == 8 )
776 p_sys->p_context->extradata_size = 8;
777 p_sys->p_context->extradata = malloc( 8 );
778 if( p_sys->p_context->extradata )
780 memcpy( p_sys->p_context->extradata,
781 p_dec->fmt_in.p_extra, p_dec->fmt_in.i_extra );
782 p_sys->p_context->sub_id = ((uint32_t*)p_dec->fmt_in.p_extra)[1];
784 msg_Warn( p_dec, "using extra data for RV codec sub_id=%08x",
785 p_sys->p_context->sub_id );
791 p_sys->p_context->extradata_size = i_size;
792 p_sys->p_context->extradata =
793 malloc( i_size + FF_INPUT_BUFFER_PADDING_SIZE );
794 if( p_sys->p_context->extradata )
796 memcpy( p_sys->p_context->extradata,
797 p_dec->fmt_in.p_extra, i_size );
798 memset( &((uint8_t*)p_sys->p_context->extradata)[i_size],
799 0, FF_INPUT_BUFFER_PADDING_SIZE );
804 /*****************************************************************************
805 * ffmpeg_CopyPicture: copy a picture from ffmpeg internal buffers to a
806 * picture_t structure (when not in direct rendering mode).
807 *****************************************************************************/
808 static void ffmpeg_CopyPicture( decoder_t *p_dec,
809 picture_t *p_pic, AVFrame *p_ff_pic )
811 decoder_sys_t *p_sys = p_dec->p_sys;
813 if( ffmpeg_PixFmtToChroma( p_sys->p_context->pix_fmt ) )
815 int i_plane, i_size, i_line;
816 uint8_t *p_dst, *p_src;
817 int i_src_stride, i_dst_stride;
819 for( i_plane = 0; i_plane < p_pic->i_planes; i_plane++ )
821 p_src = p_ff_pic->data[i_plane];
822 p_dst = p_pic->p[i_plane].p_pixels;
823 i_src_stride = p_ff_pic->linesize[i_plane];
824 i_dst_stride = p_pic->p[i_plane].i_pitch;
826 i_size = __MIN( i_src_stride, i_dst_stride );
827 for( i_line = 0; i_line < p_pic->p[i_plane].i_visible_lines;
830 vlc_memcpy( p_dst, p_src, i_size );
831 p_src += i_src_stride;
832 p_dst += i_dst_stride;
841 /* we need to convert to I420 */
842 switch( p_sys->p_context->pix_fmt )
844 case PIX_FMT_YUV410P:
845 case PIX_FMT_YUV411P:
848 #if defined(PIX_FMT_RGB8)
851 #if defined(PIX_FMT_BRG32)
855 #if defined(PIX_FMT_BGR8)
859 for( i = 0; i < p_pic->i_planes; i++ )
861 dest_pic.data[i] = p_pic->p[i].p_pixels;
862 dest_pic.linesize[i] = p_pic->p[i].i_pitch;
864 #if !defined(HAVE_LIBSWSCALE_SWSCALE_H) && !defined(HAVE_FFMPEG_SWSCALE_H)
865 img_convert( &dest_pic, PIX_FMT_YUV420P,
866 (AVPicture *)p_ff_pic,
867 p_sys->p_context->pix_fmt,
868 p_sys->p_context->width,
869 p_sys->p_context->height );
873 msg_Err( p_dec, "don't know how to convert chroma %i",
874 p_sys->p_context->pix_fmt );
881 /*****************************************************************************
882 * ffmpeg_GetFrameBuf: callback used by ffmpeg to get a frame buffer.
883 *****************************************************************************
884 * It is used for direct rendering as well as to get the right PTS for each
885 * decoded picture (even in indirect rendering mode).
886 *****************************************************************************/
887 static int ffmpeg_GetFrameBuf( struct AVCodecContext *p_context,
890 decoder_t *p_dec = (decoder_t *)p_context->opaque;
891 decoder_sys_t *p_sys = p_dec->p_sys;
894 /* Set picture PTS */
895 if( p_sys->input_pts )
897 p_ff_pic->pts = p_sys->input_pts;
899 else if( p_sys->input_dts )
901 /* Some demuxers only set the dts so let's try to find a useful
902 * timestamp from this */
903 if( !p_context->has_b_frames || !p_sys->b_has_b_frames ||
904 !p_ff_pic->reference || !p_sys->i_pts )
906 p_ff_pic->pts = p_sys->input_dts;
908 else p_ff_pic->pts = 0;
910 else p_ff_pic->pts = 0;
912 if( p_sys->i_pts ) /* make sure 1st frame has a pts > 0 */
914 p_sys->input_pts = p_sys->input_dts = 0;
917 p_ff_pic->opaque = 0;
919 /* Not much to do in indirect rendering mode */
920 if( !p_sys->b_direct_rendering )
922 return avcodec_default_get_buffer( p_context, p_ff_pic );
925 /* Some codecs set pix_fmt only after the 1st frame has been decoded,
926 * so this check is necessary. */
927 if( !ffmpeg_PixFmtToChroma( p_context->pix_fmt ) ||
928 p_sys->p_context->width % 16 || p_sys->p_context->height % 16 )
930 msg_Dbg( p_dec, "disabling direct rendering" );
931 p_sys->b_direct_rendering = 0;
932 return avcodec_default_get_buffer( p_context, p_ff_pic );
935 /* Get a new picture */
936 //p_sys->p_vout->render.b_allow_modify_pics = 0;
937 p_pic = ffmpeg_NewPictBuf( p_dec, p_sys->p_context );
940 p_sys->b_direct_rendering = 0;
941 return avcodec_default_get_buffer( p_context, p_ff_pic );
943 p_sys->p_context->draw_horiz_band = NULL;
945 p_ff_pic->opaque = (void*)p_pic;
946 p_ff_pic->type = FF_BUFFER_TYPE_USER;
947 p_ff_pic->data[0] = p_pic->p[0].p_pixels;
948 p_ff_pic->data[1] = p_pic->p[1].p_pixels;
949 p_ff_pic->data[2] = p_pic->p[2].p_pixels;
950 p_ff_pic->data[3] = NULL; /* alpha channel but I'm not sure */
952 p_ff_pic->linesize[0] = p_pic->p[0].i_pitch;
953 p_ff_pic->linesize[1] = p_pic->p[1].i_pitch;
954 p_ff_pic->linesize[2] = p_pic->p[2].i_pitch;
955 p_ff_pic->linesize[3] = 0;
957 if( p_ff_pic->reference != 0 )
959 p_dec->pf_picture_link( p_dec, p_pic );
962 /* FIXME what is that, should give good value */
963 p_ff_pic->age = 256*256*256*64; // FIXME FIXME from ffmpeg
968 static void ffmpeg_ReleaseFrameBuf( struct AVCodecContext *p_context,
971 decoder_t *p_dec = (decoder_t *)p_context->opaque;
974 if( !p_ff_pic->opaque )
976 avcodec_default_release_buffer( p_context, p_ff_pic );
980 p_pic = (picture_t*)p_ff_pic->opaque;
982 p_ff_pic->data[0] = NULL;
983 p_ff_pic->data[1] = NULL;
984 p_ff_pic->data[2] = NULL;
985 p_ff_pic->data[3] = NULL;
987 if( p_ff_pic->reference != 0 )
989 p_dec->pf_picture_unlink( p_dec, p_pic );