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;
84 /* Postprocessing handle */
91 /* FIXME (dummy palette for now) */
92 static AVPaletteControl palette_control;
94 /*****************************************************************************
96 *****************************************************************************/
97 static void ffmpeg_InitCodec ( decoder_t * );
98 static void ffmpeg_CopyPicture ( decoder_t *, picture_t *, AVFrame * );
99 static int ffmpeg_GetFrameBuf ( struct AVCodecContext *, AVFrame * );
100 static void ffmpeg_ReleaseFrameBuf( struct AVCodecContext *, AVFrame * );
102 static uint32_t ffmpeg_CodecTag( vlc_fourcc_t fcc )
104 uint8_t *p = (uint8_t*)&fcc;
105 return p[0] | (p[1] << 8) | (p[2] << 16) | (p[3] << 24);
108 /*****************************************************************************
110 *****************************************************************************/
111 static uint32_t ffmpeg_PixFmtToChroma( int i_ff_chroma )
113 switch( i_ff_chroma )
115 case PIX_FMT_YUV420P:
116 case PIX_FMT_YUVJ420P: /* Hacky but better then chroma conversion */
117 return VLC_FOURCC('I','4','2','0');
118 case PIX_FMT_YUV422P:
119 case PIX_FMT_YUVJ422P: /* Hacky but better then chroma conversion */
120 return VLC_FOURCC('I','4','2','2');
121 case PIX_FMT_YUV444P:
122 case PIX_FMT_YUVJ444P: /* Hacky but better then chroma conversion */
123 return VLC_FOURCC('I','4','4','4');
126 return VLC_FOURCC('Y','U','Y','2');
128 #if defined(WORDS_BIGENDIAN)
130 return VLC_FOURCC('R','G','B','8');
132 return VLC_FOURCC('R','V','1','5');
134 return VLC_FOURCC('R','V','1','6');
136 return VLC_FOURCC('R','V','2','4');
138 #if defined(PIX_FMT_RGB8)
140 return VLC_FOURCC('R','G','B','8');
143 return VLC_FOURCC('R','V','1','5');
145 return VLC_FOURCC('R','V','1','6');
147 return VLC_FOURCC('R','V','2','4');
150 return VLC_FOURCC('R','V','3','2');
153 return VLC_FOURCC('R','G','B','A');
156 return VLC_FOURCC('G','R','E','Y');
158 case PIX_FMT_YUV410P:
159 case PIX_FMT_YUV411P:
165 /* Returns a new picture buffer */
166 static inline picture_t *ffmpeg_NewPictBuf( decoder_t *p_dec,
167 AVCodecContext *p_context )
169 decoder_sys_t *p_sys = p_dec->p_sys;
172 p_dec->fmt_out.video.i_width = p_context->width;
173 p_dec->fmt_out.video.i_height = p_context->height;
174 p_dec->fmt_out.i_codec = ffmpeg_PixFmtToChroma( p_context->pix_fmt );
176 if( !p_context->width || !p_context->height )
178 return NULL; /* invalid display size */
181 if( !p_dec->fmt_out.i_codec )
183 /* we make conversion if possible*/
184 p_dec->fmt_out.i_codec = VLC_FOURCC('I','4','2','0');
187 /* If an aspect-ratio was specified in the input format then force it */
188 if( p_dec->fmt_in.video.i_aspect )
190 p_dec->fmt_out.video.i_aspect = p_dec->fmt_in.video.i_aspect;
194 p_dec->fmt_out.video.i_aspect =
195 VOUT_ASPECT_FACTOR * ( av_q2d(p_context->sample_aspect_ratio) *
196 p_context->width / p_context->height );
197 p_dec->fmt_out.video.i_sar_num = p_context->sample_aspect_ratio.num;
198 p_dec->fmt_out.video.i_sar_den = p_context->sample_aspect_ratio.den;
200 if( p_dec->fmt_out.video.i_aspect == 0 )
202 p_dec->fmt_out.video.i_aspect =
203 VOUT_ASPECT_FACTOR * p_context->width / p_context->height;
207 if( p_dec->fmt_out.video.i_frame_rate > 0 &&
208 p_dec->fmt_out.video.i_frame_rate_base > 0 )
210 p_dec->fmt_out.video.i_frame_rate =
211 p_dec->fmt_in.video.i_frame_rate;
212 p_dec->fmt_out.video.i_frame_rate_base =
213 p_dec->fmt_in.video.i_frame_rate_base;
215 else if( p_context->time_base.num > 0 && p_context->time_base.den > 0 )
217 p_dec->fmt_out.video.i_frame_rate = p_context->time_base.den;
218 p_dec->fmt_out.video.i_frame_rate_base = p_context->time_base.num;
221 p_pic = p_dec->pf_vout_buffer_new( p_dec );
223 // FIXME if( p_sys->p_pp && p_sys->b_pp && !p_sys->b_pp_init )
225 // FIXME InitPostproc( p_sys->p_pp, p_context->width,
226 // FIXME p_context->height, p_context->pix_fmt );
227 // FIXME p_sys->b_pp_init = true;
233 /*****************************************************************************
234 * InitVideo: initialize the video decoder
235 *****************************************************************************
236 * the ffmpeg codec will be opened, some memory allocated. The vout is not yet
237 * opened (done after the first decoded frame).
238 *****************************************************************************/
239 int InitVideoDec( decoder_t *p_dec, AVCodecContext *p_context,
240 AVCodec *p_codec, int i_codec_id, const char *psz_namecodec )
242 decoder_sys_t *p_sys;
245 /* Allocate the memory needed to store the decoder's structure */
246 if( ( p_dec->p_sys = p_sys =
247 (decoder_sys_t *)malloc(sizeof(decoder_sys_t)) ) == NULL )
249 msg_Err( p_dec, "out of memory" );
252 memset( p_sys, 0, sizeof(decoder_sys_t) );
254 p_dec->p_sys->p_context = p_context;
255 p_dec->p_sys->p_codec = p_codec;
256 p_dec->p_sys->i_codec_id = i_codec_id;
257 p_dec->p_sys->psz_namecodec = psz_namecodec;
258 p_sys->p_ff_pic = avcodec_alloc_frame();
260 /* ***** Fill p_context with init values ***** */
261 p_sys->p_context->codec_tag = ffmpeg_CodecTag( p_dec->fmt_in.i_codec );
262 p_sys->p_context->width = p_dec->fmt_in.video.i_width;
263 p_sys->p_context->height = p_dec->fmt_in.video.i_height;
264 p_sys->p_context->bits_per_sample = p_dec->fmt_in.video.i_bits_per_pixel;
266 /* ***** Get configuration of ffmpeg plugin ***** */
267 p_sys->p_context->workaround_bugs =
268 config_GetInt( p_dec, "ffmpeg-workaround-bugs" );
269 p_sys->p_context->error_resilience =
270 config_GetInt( p_dec, "ffmpeg-error-resilience" );
272 var_Create( p_dec, "grayscale", VLC_VAR_BOOL | VLC_VAR_DOINHERIT );
273 var_Get( p_dec, "grayscale", &val );
274 if( val.b_bool ) p_sys->p_context->flags |= CODEC_FLAG_GRAY;
276 var_Create( p_dec, "ffmpeg-vismv", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT );
277 var_Get( p_dec, "ffmpeg-vismv", &val );
278 if( val.i_int ) p_sys->p_context->debug_mv = val.i_int;
280 var_Create( p_dec, "ffmpeg-lowres", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT );
281 var_Get( p_dec, "ffmpeg-lowres", &val );
282 if( val.i_int > 0 && val.i_int <= 2 ) p_sys->p_context->lowres = val.i_int;
284 var_Create( p_dec, "ffmpeg-skiploopfilter",
285 VLC_VAR_INTEGER | VLC_VAR_DOINHERIT );
286 var_Get( p_dec, "ffmpeg-skiploopfilter", &val );
287 if( val.i_int > 0 ) p_sys->p_context->skip_loop_filter = AVDISCARD_NONREF;
288 if( val.i_int > 1 ) p_sys->p_context->skip_loop_filter = AVDISCARD_BIDIR;
289 if( val.i_int > 2 ) p_sys->p_context->skip_loop_filter = AVDISCARD_NONKEY;
290 if( val.i_int > 3 ) p_sys->p_context->skip_loop_filter = AVDISCARD_ALL;
292 /* ***** ffmpeg frame skipping ***** */
293 var_Create( p_dec, "ffmpeg-hurry-up", VLC_VAR_BOOL | VLC_VAR_DOINHERIT );
294 var_Get( p_dec, "ffmpeg-hurry-up", &val );
295 p_sys->b_hurry_up = val.b_bool;
297 var_Create( p_dec, "ffmpeg-skip-frame", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT );
298 var_Get( p_dec, "ffmpeg-skip-frame", &val );
302 p_sys->p_context->skip_frame = AVDISCARD_NONE;
305 p_sys->p_context->skip_frame = AVDISCARD_DEFAULT;
308 p_sys->p_context->skip_frame = AVDISCARD_BIDIR;
311 p_sys->p_context->skip_frame = AVDISCARD_NONKEY;
314 p_sys->p_context->skip_frame = AVDISCARD_ALL;
317 p_sys->p_context->skip_frame = AVDISCARD_NONE;
320 p_sys->i_skip_frame = p_sys->p_context->skip_frame;
322 var_Create( p_dec, "ffmpeg-skip-idct", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT );
323 var_Get( p_dec, "ffmpeg-skip-idct", &val );
327 p_sys->p_context->skip_idct = AVDISCARD_NONE;
330 p_sys->p_context->skip_idct = AVDISCARD_DEFAULT;
333 p_sys->p_context->skip_idct = AVDISCARD_BIDIR;
336 p_sys->p_context->skip_idct = AVDISCARD_NONKEY;
339 p_sys->p_context->skip_idct = AVDISCARD_ALL;
342 p_sys->p_context->skip_idct = AVDISCARD_NONE;
345 p_sys->i_skip_idct = p_sys->p_context->skip_idct;
347 /* ***** ffmpeg direct rendering ***** */
348 p_sys->b_direct_rendering = 0;
349 var_Create( p_dec, "ffmpeg-dr", VLC_VAR_BOOL | VLC_VAR_DOINHERIT );
350 var_Get( p_dec, "ffmpeg-dr", &val );
351 if( val.b_bool && (p_sys->p_codec->capabilities & CODEC_CAP_DR1) &&
352 /* Apparently direct rendering doesn't work with YUV422P */
353 p_sys->p_context->pix_fmt != PIX_FMT_YUV422P &&
354 /* H264 uses too many reference frames */
355 p_sys->i_codec_id != CODEC_ID_H264 &&
356 !p_sys->p_context->debug_mv )
358 /* Some codecs set pix_fmt only after the 1st frame has been decoded,
359 * so we need to do another check in ffmpeg_GetFrameBuf() */
360 p_sys->b_direct_rendering = 1;
364 p_sys->b_pp = p_sys->b_pp_async = p_sys->b_pp_init = false;
365 // FIXME p_sys->p_pp = OpenPostproc( p_dec, &p_sys->b_pp_async );
367 /* ffmpeg doesn't properly release old pictures when frames are skipped */
368 //if( p_sys->b_hurry_up ) p_sys->b_direct_rendering = 0;
369 if( p_sys->b_direct_rendering )
371 msg_Dbg( p_dec, "using direct rendering" );
372 p_sys->p_context->flags |= CODEC_FLAG_EMU_EDGE;
375 /* Always use our get_buffer wrapper so we can calculate the
377 p_sys->p_context->get_buffer = ffmpeg_GetFrameBuf;
378 p_sys->p_context->release_buffer = ffmpeg_ReleaseFrameBuf;
379 p_sys->p_context->opaque = p_dec;
381 /* ***** init this codec with special data ***** */
382 ffmpeg_InitCodec( p_dec );
384 /* ***** misc init ***** */
385 p_sys->input_pts = p_sys->input_dts = 0;
387 p_sys->b_has_b_frames = false;
388 p_sys->b_first_frame = true;
389 p_sys->i_late_frames = 0;
391 p_sys->i_buffer_orig = 1;
392 p_sys->p_buffer_orig = p_sys->p_buffer = malloc( p_sys->i_buffer_orig );
394 /* Set output properties */
395 p_dec->fmt_out.i_cat = VIDEO_ES;
396 p_dec->fmt_out.i_codec = ffmpeg_PixFmtToChroma( p_context->pix_fmt );
399 if( p_dec->fmt_in.video.p_palette )
400 p_sys->p_context->palctrl =
401 (AVPaletteControl *)p_dec->fmt_in.video.p_palette;
403 p_sys->p_context->palctrl = &palette_control;
405 /* ***** Open the codec ***** */
406 vlc_mutex_t *lock = var_AcquireMutex( "avcodec" );
413 if( avcodec_open( p_sys->p_context, p_sys->p_codec ) < 0 )
415 vlc_mutex_unlock( lock );
416 msg_Err( p_dec, "cannot open codec (%s)", p_sys->psz_namecodec );
420 vlc_mutex_unlock( lock );
421 msg_Dbg( p_dec, "ffmpeg codec (%s) started", p_sys->psz_namecodec );
427 /*****************************************************************************
428 * DecodeVideo: Called to decode one or more frames
429 *****************************************************************************/
430 picture_t *DecodeVideo( decoder_t *p_dec, block_t **pp_block )
432 decoder_sys_t *p_sys = p_dec->p_sys;
434 int b_null_size = false;
437 if( !pp_block || !*pp_block ) return NULL;
439 if( !p_sys->p_context->extradata_size && p_dec->fmt_in.i_extra )
440 ffmpeg_InitCodec( p_dec );
444 if( p_block->i_flags & (BLOCK_FLAG_DISCONTINUITY|BLOCK_FLAG_CORRUPTED) )
447 p_sys->i_pts = 0; /* To make sure we recover properly */
449 p_sys->input_pts = p_sys->input_dts = 0;
450 p_sys->i_late_frames = 0;
452 block_Release( p_block );
454 //if( p_block->i_flags & BLOCK_FLAG_CORRUPTED )
455 //avcodec_flush_buffers( p_sys->p_context );
459 if( p_block->i_flags & BLOCK_FLAG_PREROLL )
461 /* Do not care about late frames when prerolling
462 * TODO avoid decoding of non reference frame
463 * (ie all B except for H264 where it depends only on nal_ref_idc) */
464 p_sys->i_late_frames = 0;
467 if( !p_dec->b_pace_control && (p_sys->i_late_frames > 0) &&
468 (mdate() - p_sys->i_late_frames_start > INT64_C(5000000)) )
472 msg_Err( p_dec, "more than 5 seconds of late video -> "
473 "dropping frame (computer too slow ?)" );
474 p_sys->i_pts = 0; /* To make sure we recover properly */
476 block_Release( p_block );
477 p_sys->i_late_frames--;
481 if( p_block->i_pts > 0 || p_block->i_dts > 0 )
483 p_sys->input_pts = p_block->i_pts;
484 p_sys->input_dts = p_block->i_dts;
486 /* Make sure we don't reuse the same timestamps twice */
487 p_block->i_pts = p_block->i_dts = 0;
490 /* A good idea could be to decode all I pictures and see for the other */
491 if( !p_dec->b_pace_control &&
493 (p_sys->i_late_frames > 4) )
496 if( p_sys->i_late_frames < 8 )
498 p_sys->p_context->skip_frame =
499 (p_sys->i_skip_frame <= AVDISCARD_BIDIR) ?
500 AVDISCARD_BIDIR : p_sys->i_skip_frame;
504 /* picture too late, won't decode
505 * but break picture until a new I, and for mpeg4 ...*/
506 p_sys->i_late_frames--; /* needed else it will never be decrease */
507 block_Release( p_block );
514 if( p_sys->b_hurry_up )
515 p_sys->p_context->skip_frame = p_sys->i_skip_frame;
516 if( !(p_block->i_flags & BLOCK_FLAG_PREROLL) )
522 if( p_sys->p_context->width <= 0 || p_sys->p_context->height <= 0 )
524 if( p_sys->b_hurry_up )
525 p_sys->p_context->skip_frame = p_sys->i_skip_frame;
530 * Do the actual decoding now
533 /* Check if post-processing was enabled */
534 p_sys->b_pp = p_sys->b_pp_async;
536 /* Don't forget that ffmpeg requires a little more bytes
537 * that the real frame size */
538 if( p_block->i_buffer > 0 )
540 p_sys->i_buffer = p_block->i_buffer;
541 if( p_sys->i_buffer + FF_INPUT_BUFFER_PADDING_SIZE >
542 p_sys->i_buffer_orig )
544 free( p_sys->p_buffer_orig );
545 p_sys->i_buffer_orig =
546 p_block->i_buffer + FF_INPUT_BUFFER_PADDING_SIZE;
547 p_sys->p_buffer_orig = malloc( p_sys->i_buffer_orig );
549 p_sys->p_buffer = p_sys->p_buffer_orig;
550 p_sys->i_buffer = p_block->i_buffer;
551 vlc_memcpy( p_sys->p_buffer, p_block->p_buffer, p_block->i_buffer );
552 memset( p_sys->p_buffer + p_block->i_buffer, 0,
553 FF_INPUT_BUFFER_PADDING_SIZE );
555 p_block->i_buffer = 0;
558 while( p_sys->i_buffer > 0 )
560 int i_used, b_gotpicture;
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 );
566 if( b_null_size && p_sys->p_context->width > 0 &&
567 p_sys->p_context->height > 0 )
569 /* Reparse it to not drop the I frame */
571 if( p_sys->b_hurry_up )
572 p_sys->p_context->skip_frame = p_sys->i_skip_frame;
573 i_used = avcodec_decode_video( p_sys->p_context, p_sys->p_ff_pic,
575 (uint8_t*)p_sys->p_buffer, p_sys->i_buffer );
580 msg_Warn( p_dec, "cannot decode one frame (%d bytes)",
582 block_Release( p_block );
585 else if( i_used > p_sys->i_buffer )
587 i_used = p_sys->i_buffer;
591 p_sys->i_buffer -= i_used;
592 p_sys->p_buffer += i_used;
594 /* Nothing to display */
597 if( i_used == 0 ) break;
601 /* Update frame late count (except when doing preroll) */
602 if( p_sys->i_pts && decoder_GetDisplayDate(p_dec, p_sys->i_pts) <= mdate() &&
603 !(p_block->i_flags & BLOCK_FLAG_PREROLL) )
605 p_sys->i_late_frames++;
606 if( p_sys->i_late_frames == 1 )
607 p_sys->i_late_frames_start = mdate();
611 p_sys->i_late_frames = 0;
614 if( !b_drawpicture || !p_sys->p_ff_pic->linesize[0] )
616 /* Do not display the picture */
617 p_pic = (picture_t *)p_sys->p_ff_pic->opaque;
618 if( !b_drawpicture && p_pic )
619 p_dec->pf_vout_buffer_del( p_dec, p_pic );
623 if( !p_sys->p_ff_pic->opaque )
625 /* Get a new picture */
626 p_pic = ffmpeg_NewPictBuf( p_dec, p_sys->p_context );
629 block_Release( p_block );
633 /* Fill p_picture_t from AVVideoFrame and do chroma conversion
635 ffmpeg_CopyPicture( p_dec, p_pic, p_sys->p_ff_pic );
639 p_pic = (picture_t *)p_sys->p_ff_pic->opaque;
643 if( p_sys->p_ff_pic->pts ) p_sys->i_pts = p_sys->p_ff_pic->pts;
645 /* Sanity check (seems to be needed for some streams) */
646 if( p_sys->p_ff_pic->pict_type == FF_B_TYPE )
648 p_sys->b_has_b_frames = true;
651 if( !p_dec->fmt_in.video.i_aspect )
653 /* Fetch again the aspect ratio in case it changed */
654 p_dec->fmt_out.video.i_aspect =
656 * ( av_q2d(p_sys->p_context->sample_aspect_ratio)
657 * p_sys->p_context->width / p_sys->p_context->height );
658 p_dec->fmt_out.video.i_sar_num
659 = p_sys->p_context->sample_aspect_ratio.num;
660 p_dec->fmt_out.video.i_sar_den
661 = p_sys->p_context->sample_aspect_ratio.den;
663 if( p_dec->fmt_out.video.i_aspect == 0 )
665 p_dec->fmt_out.video.i_aspect = VOUT_ASPECT_FACTOR
666 * p_sys->p_context->width / p_sys->p_context->height;
670 /* Send decoded frame to vout */
673 p_pic->date = p_sys->i_pts;
675 /* interpolate the next PTS */
676 if( p_dec->fmt_in.video.i_frame_rate > 0 &&
677 p_dec->fmt_in.video.i_frame_rate_base > 0 )
679 p_sys->i_pts += INT64_C(1000000) *
680 (2 + p_sys->p_ff_pic->repeat_pict) *
681 p_dec->fmt_in.video.i_frame_rate_base *
682 p_block->i_rate / INPUT_RATE_DEFAULT /
683 (2 * p_dec->fmt_in.video.i_frame_rate);
685 else if( p_sys->p_context->time_base.den > 0 )
687 p_sys->i_pts += INT64_C(1000000) *
688 (2 + p_sys->p_ff_pic->repeat_pict) *
689 p_sys->p_context->time_base.num *
690 p_block->i_rate / INPUT_RATE_DEFAULT /
691 (2 * p_sys->p_context->time_base.den);
694 if( p_sys->b_first_frame )
696 /* Hack to force display of still pictures */
697 p_sys->b_first_frame = false;
698 p_pic->b_force = true;
701 p_pic->i_nb_fields = 2 + p_sys->p_ff_pic->repeat_pict;
702 p_pic->b_progressive = !p_sys->p_ff_pic->interlaced_frame;
703 p_pic->b_top_field_first = p_sys->p_ff_pic->top_field_first;
709 p_dec->pf_vout_buffer_del( p_dec, p_pic );
713 block_Release( p_block );
717 /*****************************************************************************
718 * EndVideo: decoder destruction
719 *****************************************************************************
720 * This function is called when the thread ends after a successful
722 *****************************************************************************/
723 void EndVideoDec( decoder_t *p_dec )
725 decoder_sys_t *p_sys = p_dec->p_sys;
727 if( p_sys->p_ff_pic ) av_free( p_sys->p_ff_pic );
728 // FIXME ClosePostproc( p_dec, p_sys->p_pp );
729 free( p_sys->p_buffer_orig );
732 /*****************************************************************************
733 * ffmpeg_InitCodec: setup codec extra initialization data for ffmpeg
734 *****************************************************************************/
735 static void ffmpeg_InitCodec( decoder_t *p_dec )
737 decoder_sys_t *p_sys = p_dec->p_sys;
738 int i_size = p_dec->fmt_in.i_extra;
740 if( !i_size ) return;
742 if( p_sys->i_codec_id == CODEC_ID_SVQ3 )
746 p_sys->p_context->extradata_size = i_size + 12;
747 p = p_sys->p_context->extradata =
748 malloc( p_sys->p_context->extradata_size );
750 memcpy( &p[0], "SVQ3", 4 );
751 memset( &p[4], 0, 8 );
752 memcpy( &p[12], p_dec->fmt_in.p_extra, i_size );
754 /* Now remove all atoms before the SMI one */
755 if( p_sys->p_context->extradata_size > 0x5a &&
756 strncmp( (char*)&p[0x56], "SMI ", 4 ) )
758 uint8_t *psz = &p[0x52];
760 while( psz < &p[p_sys->p_context->extradata_size - 8] )
762 int i_size = GetDWBE( psz );
765 /* FIXME handle 1 as long size */
768 if( !strncmp( (char*)&psz[4], "SMI ", 4 ) )
770 memmove( &p[0x52], psz,
771 &p[p_sys->p_context->extradata_size] - psz );
779 else if( p_dec->fmt_in.i_codec == VLC_FOURCC( 'R', 'V', '1', '0' ) ||
780 p_dec->fmt_in.i_codec == VLC_FOURCC( 'R', 'V', '1', '3' ) ||
781 p_dec->fmt_in.i_codec == VLC_FOURCC( 'R', 'V', '2', '0' ) )
783 if( p_dec->fmt_in.i_extra == 8 )
785 p_sys->p_context->extradata_size = 8;
786 p_sys->p_context->extradata = malloc( 8 );
788 memcpy( p_sys->p_context->extradata,
789 p_dec->fmt_in.p_extra, p_dec->fmt_in.i_extra );
790 p_sys->p_context->sub_id= ((uint32_t*)p_dec->fmt_in.p_extra)[1];
792 msg_Warn( p_dec, "using extra data for RV codec sub_id=%08x",
793 p_sys->p_context->sub_id );
798 p_sys->p_context->extradata_size = i_size;
799 p_sys->p_context->extradata =
800 malloc( i_size + FF_INPUT_BUFFER_PADDING_SIZE );
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 );
808 /*****************************************************************************
809 * ffmpeg_CopyPicture: copy a picture from ffmpeg internal buffers to a
810 * picture_t structure (when not in direct rendering mode).
811 *****************************************************************************/
812 static void ffmpeg_CopyPicture( decoder_t *p_dec,
813 picture_t *p_pic, AVFrame *p_ff_pic )
815 decoder_sys_t *p_sys = p_dec->p_sys;
817 if( ffmpeg_PixFmtToChroma( p_sys->p_context->pix_fmt ) )
819 int i_plane, i_size, i_line;
820 uint8_t *p_dst, *p_src;
821 int i_src_stride, i_dst_stride;
823 // FIXME if( p_sys->p_pp && p_sys->b_pp )
824 // FIXME PostprocPict( p_sys->p_pp, p_pic, p_ff_pic );
827 for( i_plane = 0; i_plane < p_pic->i_planes; i_plane++ )
829 p_src = p_ff_pic->data[i_plane];
830 p_dst = p_pic->p[i_plane].p_pixels;
831 i_src_stride = p_ff_pic->linesize[i_plane];
832 i_dst_stride = p_pic->p[i_plane].i_pitch;
834 i_size = __MIN( i_src_stride, i_dst_stride );
835 for( i_line = 0; i_line < p_pic->p[i_plane].i_visible_lines;
838 vlc_memcpy( p_dst, p_src, i_size );
839 p_src += i_src_stride;
840 p_dst += i_dst_stride;
850 /* we need to convert to I420 */
851 switch( p_sys->p_context->pix_fmt )
853 case PIX_FMT_YUV410P:
854 case PIX_FMT_YUV411P:
857 #if defined(PIX_FMT_RGB8)
860 #if defined(PIX_FMT_BRG32)
864 #if defined(PIX_FMT_BGR8)
868 for( i = 0; i < p_pic->i_planes; i++ )
870 dest_pic.data[i] = p_pic->p[i].p_pixels;
871 dest_pic.linesize[i] = p_pic->p[i].i_pitch;
873 #if !defined(HAVE_LIBSWSCALE_SWSCALE_H) && !defined(HAVE_FFMPEG_SWSCALE_H)
874 img_convert( &dest_pic, PIX_FMT_YUV420P,
875 (AVPicture *)p_ff_pic,
876 p_sys->p_context->pix_fmt,
877 p_sys->p_context->width,
878 p_sys->p_context->height );
882 msg_Err( p_dec, "don't know how to convert chroma %i",
883 p_sys->p_context->pix_fmt );
890 /*****************************************************************************
891 * ffmpeg_GetFrameBuf: callback used by ffmpeg to get a frame buffer.
892 *****************************************************************************
893 * It is used for direct rendering as well as to get the right PTS for each
894 * decoded picture (even in indirect rendering mode).
895 *****************************************************************************/
896 static int ffmpeg_GetFrameBuf( struct AVCodecContext *p_context,
899 decoder_t *p_dec = (decoder_t *)p_context->opaque;
900 decoder_sys_t *p_sys = p_dec->p_sys;
903 /* Set picture PTS */
904 if( p_sys->input_pts )
906 p_ff_pic->pts = p_sys->input_pts;
908 else if( p_sys->input_dts )
910 /* Some demuxers only set the dts so let's try to find a useful
911 * timestamp from this */
912 if( !p_context->has_b_frames || !p_sys->b_has_b_frames ||
913 !p_ff_pic->reference || !p_sys->i_pts )
915 p_ff_pic->pts = p_sys->input_dts;
917 else p_ff_pic->pts = 0;
919 else p_ff_pic->pts = 0;
921 if( p_sys->i_pts ) /* make sure 1st frame has a pts > 0 */
923 p_sys->input_pts = p_sys->input_dts = 0;
926 p_ff_pic->opaque = 0;
928 /* Not much to do in indirect rendering mode */
929 if( !p_sys->b_direct_rendering || p_sys->b_pp )
931 return avcodec_default_get_buffer( p_context, p_ff_pic );
934 /* Some codecs set pix_fmt only after the 1st frame has been decoded,
935 * so this check is necessary. */
936 if( !ffmpeg_PixFmtToChroma( p_context->pix_fmt ) ||
937 p_sys->p_context->width % 16 || p_sys->p_context->height % 16 )
939 msg_Dbg( p_dec, "disabling direct rendering" );
940 p_sys->b_direct_rendering = 0;
941 return avcodec_default_get_buffer( p_context, p_ff_pic );
944 /* Get a new picture */
945 //p_sys->p_vout->render.b_allow_modify_pics = 0;
946 p_pic = ffmpeg_NewPictBuf( p_dec, p_sys->p_context );
949 p_sys->b_direct_rendering = 0;
950 return avcodec_default_get_buffer( p_context, p_ff_pic );
952 p_sys->p_context->draw_horiz_band = NULL;
954 p_ff_pic->opaque = (void*)p_pic;
955 p_ff_pic->type = FF_BUFFER_TYPE_USER;
956 p_ff_pic->data[0] = p_pic->p[0].p_pixels;
957 p_ff_pic->data[1] = p_pic->p[1].p_pixels;
958 p_ff_pic->data[2] = p_pic->p[2].p_pixels;
959 p_ff_pic->data[3] = NULL; /* alpha channel but I'm not sure */
961 p_ff_pic->linesize[0] = p_pic->p[0].i_pitch;
962 p_ff_pic->linesize[1] = p_pic->p[1].i_pitch;
963 p_ff_pic->linesize[2] = p_pic->p[2].i_pitch;
964 p_ff_pic->linesize[3] = 0;
966 if( p_ff_pic->reference != 0 )
968 p_dec->pf_picture_link( p_dec, p_pic );
971 /* FIXME what is that, should give good value */
972 p_ff_pic->age = 256*256*256*64; // FIXME FIXME from ffmpeg
977 static void ffmpeg_ReleaseFrameBuf( struct AVCodecContext *p_context,
980 decoder_t *p_dec = (decoder_t *)p_context->opaque;
983 if( !p_ff_pic->opaque )
985 avcodec_default_release_buffer( p_context, p_ff_pic );
989 p_pic = (picture_t*)p_ff_pic->opaque;
991 p_ff_pic->data[0] = NULL;
992 p_ff_pic->data[1] = NULL;
993 p_ff_pic->data[2] = NULL;
994 p_ff_pic->data[3] = NULL;
996 if( p_ff_pic->reference != 0 )
998 p_dec->pf_picture_unlink( p_dec, p_pic );