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_codecs.h> /* BITMAPINFOHEADER */
38 #ifdef HAVE_LIBAVCODEC_AVCODEC_H
39 # include <libavcodec/avcodec.h>
40 #elif defined(HAVE_FFMPEG_AVCODEC_H)
41 # 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 AVPaletteControl palette;
91 /* FIXME (dummy palette for now) */
92 static const 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 int ffmpeg_ReGetFrameBuf( struct AVCodecContext *, AVFrame * );
101 static void ffmpeg_ReleaseFrameBuf( struct AVCodecContext *, AVFrame * );
102 static void ffmpeg_NextPts( decoder_t * );
104 static uint32_t ffmpeg_CodecTag( vlc_fourcc_t fcc )
106 uint8_t *p = (uint8_t*)&fcc;
107 return p[0] | (p[1] << 8) | (p[2] << 16) | (p[3] << 24);
110 /*****************************************************************************
112 *****************************************************************************/
114 /* Returns a new picture buffer */
115 static inline picture_t *ffmpeg_NewPictBuf( decoder_t *p_dec,
116 AVCodecContext *p_context )
120 p_dec->fmt_out.video.i_width = p_context->width;
121 p_dec->fmt_out.video.i_height = p_context->height;
123 if( !p_context->width || !p_context->height )
125 return NULL; /* invalid display size */
128 if( GetVlcChroma( &p_dec->fmt_out.video, p_context->pix_fmt ) != VLC_SUCCESS )
130 /* we are doomed, but not really, because most codecs set their pix_fmt much later */
131 p_dec->fmt_out.i_codec = VLC_FOURCC('I','4','2','0');
133 p_dec->fmt_out.i_codec = p_dec->fmt_out.video.i_chroma;
135 /* If an aspect-ratio was specified in the input format then force it */
136 if( p_dec->fmt_in.video.i_aspect )
138 p_dec->fmt_out.video.i_aspect = p_dec->fmt_in.video.i_aspect;
142 p_dec->fmt_out.video.i_aspect =
143 VOUT_ASPECT_FACTOR * ( av_q2d(p_context->sample_aspect_ratio) *
144 p_context->width / p_context->height );
145 p_dec->fmt_out.video.i_sar_num = p_context->sample_aspect_ratio.num;
146 p_dec->fmt_out.video.i_sar_den = p_context->sample_aspect_ratio.den;
148 if( p_dec->fmt_out.video.i_aspect == 0 )
150 p_dec->fmt_out.video.i_aspect =
151 VOUT_ASPECT_FACTOR * p_context->width / p_context->height;
155 if( p_dec->fmt_out.video.i_frame_rate > 0 &&
156 p_dec->fmt_out.video.i_frame_rate_base > 0 )
158 p_dec->fmt_out.video.i_frame_rate =
159 p_dec->fmt_in.video.i_frame_rate;
160 p_dec->fmt_out.video.i_frame_rate_base =
161 p_dec->fmt_in.video.i_frame_rate_base;
163 else if( p_context->time_base.num > 0 && p_context->time_base.den > 0 )
165 p_dec->fmt_out.video.i_frame_rate = p_context->time_base.den;
166 p_dec->fmt_out.video.i_frame_rate_base = p_context->time_base.num;
169 p_pic = p_dec->pf_vout_buffer_new( p_dec );
174 /*****************************************************************************
175 * InitVideo: initialize the video decoder
176 *****************************************************************************
177 * the ffmpeg codec will be opened, some memory allocated. The vout is not yet
178 * opened (done after the first decoded frame).
179 *****************************************************************************/
180 int InitVideoDec( decoder_t *p_dec, AVCodecContext *p_context,
181 AVCodec *p_codec, int i_codec_id, const char *psz_namecodec )
183 decoder_sys_t *p_sys;
186 /* Allocate the memory needed to store the decoder's structure */
187 if( ( p_dec->p_sys = p_sys =
188 (decoder_sys_t *)malloc(sizeof(decoder_sys_t)) ) == NULL )
192 memset( p_sys, 0, sizeof(decoder_sys_t) );
194 p_dec->p_sys->p_context = p_context;
195 p_dec->p_sys->p_codec = p_codec;
196 p_dec->p_sys->i_codec_id = i_codec_id;
197 p_dec->p_sys->psz_namecodec = psz_namecodec;
198 p_sys->p_ff_pic = avcodec_alloc_frame();
200 /* ***** Fill p_context with init values ***** */
201 p_sys->p_context->codec_tag = ffmpeg_CodecTag( p_dec->fmt_in.i_codec );
202 p_sys->p_context->width = p_dec->fmt_in.video.i_width;
203 p_sys->p_context->height = p_dec->fmt_in.video.i_height;
204 #if LIBAVCODEC_VERSION_INT < ((52<<16)+(0<<8)+0)
205 p_sys->p_context->bits_per_sample = p_dec->fmt_in.video.i_bits_per_pixel;
207 p_sys->p_context->bits_per_coded_sample = p_dec->fmt_in.video.i_bits_per_pixel;
210 /* ***** Get configuration of ffmpeg plugin ***** */
211 p_sys->p_context->workaround_bugs =
212 config_GetInt( p_dec, "ffmpeg-workaround-bugs" );
213 #if LIBAVCODEC_VERSION_INT < ((52<<16)+(0<<8)+0)
214 p_sys->p_context->error_resilience =
215 config_GetInt( p_dec, "ffmpeg-error-resilience" );
217 p_sys->p_context->error_recognition =
218 config_GetInt( p_dec, "ffmpeg-error-resilience" );
221 var_Create( p_dec, "grayscale", VLC_VAR_BOOL | VLC_VAR_DOINHERIT );
222 var_Get( p_dec, "grayscale", &val );
223 if( val.b_bool ) p_sys->p_context->flags |= CODEC_FLAG_GRAY;
225 var_Create( p_dec, "ffmpeg-vismv", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT );
226 var_Get( p_dec, "ffmpeg-vismv", &val );
227 if( val.i_int ) p_sys->p_context->debug_mv = val.i_int;
229 var_Create( p_dec, "ffmpeg-lowres", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT );
230 var_Get( p_dec, "ffmpeg-lowres", &val );
231 if( val.i_int > 0 && val.i_int <= 2 ) p_sys->p_context->lowres = val.i_int;
233 var_Create( p_dec, "ffmpeg-skiploopfilter",
234 VLC_VAR_INTEGER | VLC_VAR_DOINHERIT );
235 var_Get( p_dec, "ffmpeg-skiploopfilter", &val );
236 if( val.i_int > 0 ) p_sys->p_context->skip_loop_filter = AVDISCARD_NONREF;
237 if( val.i_int > 1 ) p_sys->p_context->skip_loop_filter = AVDISCARD_BIDIR;
238 if( val.i_int > 2 ) p_sys->p_context->skip_loop_filter = AVDISCARD_NONKEY;
239 if( val.i_int > 3 ) p_sys->p_context->skip_loop_filter = AVDISCARD_ALL;
241 /* ***** ffmpeg frame skipping ***** */
242 var_Create( p_dec, "ffmpeg-hurry-up", VLC_VAR_BOOL | VLC_VAR_DOINHERIT );
243 var_Get( p_dec, "ffmpeg-hurry-up", &val );
244 p_sys->b_hurry_up = val.b_bool;
246 var_Create( p_dec, "ffmpeg-skip-frame", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT );
247 var_Get( p_dec, "ffmpeg-skip-frame", &val );
251 p_sys->p_context->skip_frame = AVDISCARD_NONE;
254 p_sys->p_context->skip_frame = AVDISCARD_DEFAULT;
257 p_sys->p_context->skip_frame = AVDISCARD_BIDIR;
260 p_sys->p_context->skip_frame = AVDISCARD_NONKEY;
263 p_sys->p_context->skip_frame = AVDISCARD_ALL;
266 p_sys->p_context->skip_frame = AVDISCARD_NONE;
269 p_sys->i_skip_frame = p_sys->p_context->skip_frame;
271 var_Create( p_dec, "ffmpeg-skip-idct", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT );
272 var_Get( p_dec, "ffmpeg-skip-idct", &val );
276 p_sys->p_context->skip_idct = AVDISCARD_NONE;
279 p_sys->p_context->skip_idct = AVDISCARD_DEFAULT;
282 p_sys->p_context->skip_idct = AVDISCARD_BIDIR;
285 p_sys->p_context->skip_idct = AVDISCARD_NONKEY;
288 p_sys->p_context->skip_idct = AVDISCARD_ALL;
291 p_sys->p_context->skip_idct = AVDISCARD_NONE;
294 p_sys->i_skip_idct = p_sys->p_context->skip_idct;
296 /* ***** ffmpeg direct rendering ***** */
297 p_sys->b_direct_rendering = 0;
298 var_Create( p_dec, "ffmpeg-dr", VLC_VAR_BOOL | VLC_VAR_DOINHERIT );
299 var_Get( p_dec, "ffmpeg-dr", &val );
300 if( val.b_bool && (p_sys->p_codec->capabilities & CODEC_CAP_DR1) &&
301 /* Apparently direct rendering doesn't work with YUV422P */
302 p_sys->p_context->pix_fmt != PIX_FMT_YUV422P &&
303 /* H264 uses too many reference frames */
304 p_sys->i_codec_id != CODEC_ID_H264 &&
305 !p_sys->p_context->debug_mv )
307 /* Some codecs set pix_fmt only after the 1st frame has been decoded,
308 * so we need to do another check in ffmpeg_GetFrameBuf() */
309 p_sys->b_direct_rendering = 1;
312 /* ffmpeg doesn't properly release old pictures when frames are skipped */
313 //if( p_sys->b_hurry_up ) p_sys->b_direct_rendering = 0;
314 if( p_sys->b_direct_rendering )
316 msg_Dbg( p_dec, "using direct rendering" );
317 p_sys->p_context->flags |= CODEC_FLAG_EMU_EDGE;
320 /* Always use our get_buffer wrapper so we can calculate the
322 p_sys->p_context->get_buffer = ffmpeg_GetFrameBuf;
323 p_sys->p_context->reget_buffer = ffmpeg_ReGetFrameBuf;
324 p_sys->p_context->release_buffer = ffmpeg_ReleaseFrameBuf;
325 p_sys->p_context->opaque = p_dec;
327 /* ***** init this codec with special data ***** */
328 ffmpeg_InitCodec( p_dec );
330 /* ***** misc init ***** */
331 p_sys->input_pts = p_sys->input_dts = 0;
333 p_sys->b_has_b_frames = false;
334 p_sys->b_first_frame = true;
335 p_sys->b_flush = false;
336 p_sys->i_late_frames = 0;
338 p_sys->i_buffer_orig = 1;
339 p_sys->p_buffer_orig = p_sys->p_buffer = malloc( p_sys->i_buffer_orig );
340 if( !p_sys->p_buffer_orig )
346 /* Set output properties */
347 p_dec->fmt_out.i_cat = VIDEO_ES;
348 if( GetVlcChroma( &p_dec->fmt_out.video, p_context->pix_fmt ) != VLC_SUCCESS )
350 /* we are doomed. but not really, because most codecs set their pix_fmt later on */
351 p_dec->fmt_out.i_codec = VLC_FOURCC('I','4','2','0');
353 p_dec->fmt_out.i_codec = p_dec->fmt_out.video.i_chroma;
356 memset( &p_sys->palette, 0, sizeof(p_sys->palette) );
357 if( p_dec->fmt_in.video.p_palette )
359 p_sys->palette.palette_changed = 1;
361 for( int i = 0; i < __MIN( AVPALETTE_COUNT, p_dec->fmt_in.video.p_palette->i_entries ); i++ )
367 c.a[0] = p_dec->fmt_in.video.p_palette->palette[i][0];
368 c.a[1] = p_dec->fmt_in.video.p_palette->palette[i][1];
369 c.a[2] = p_dec->fmt_in.video.p_palette->palette[i][2];
370 c.a[3] = p_dec->fmt_in.video.p_palette->palette[i][3];
372 p_sys->palette.palette[i] = c.u;
374 p_sys->p_context->palctrl = &p_sys->palette;
376 p_dec->fmt_out.video.p_palette = malloc( sizeof(video_palette_t) );
377 if( p_dec->fmt_out.video.p_palette )
378 *p_dec->fmt_out.video.p_palette = *p_dec->fmt_in.video.p_palette;
380 else if( p_sys->i_codec_id != CODEC_ID_MSVIDEO1 && p_sys->i_codec_id != CODEC_ID_CINEPAK )
382 p_sys->p_context->palctrl = &p_sys->palette;
385 /* ***** Open the codec ***** */
386 vlc_mutex_t *lock = var_AcquireMutex( "avcodec" );
389 free( p_sys->p_buffer_orig );
394 if( avcodec_open( p_sys->p_context, p_sys->p_codec ) < 0 )
396 vlc_mutex_unlock( lock );
397 msg_Err( p_dec, "cannot open codec (%s)", p_sys->psz_namecodec );
398 free( p_sys->p_buffer_orig );
402 vlc_mutex_unlock( lock );
403 msg_Dbg( p_dec, "ffmpeg codec (%s) started", p_sys->psz_namecodec );
409 /*****************************************************************************
410 * DecodeVideo: Called to decode one or more frames
411 *****************************************************************************/
412 picture_t *DecodeVideo( decoder_t *p_dec, block_t **pp_block )
414 decoder_sys_t *p_sys = p_dec->p_sys;
416 int b_null_size = false;
419 if( !pp_block || !*pp_block ) return NULL;
421 if( !p_sys->p_context->extradata_size && p_dec->fmt_in.i_extra )
422 ffmpeg_InitCodec( p_dec );
426 if( p_block->i_flags & (BLOCK_FLAG_DISCONTINUITY|BLOCK_FLAG_CORRUPTED) )
429 p_sys->i_pts = 0; /* To make sure we recover properly */
431 p_sys->input_pts = p_sys->input_dts = 0;
432 p_sys->i_late_frames = 0;
434 block_Release( p_block );
436 //if( p_block->i_flags & BLOCK_FLAG_CORRUPTED )
437 //avcodec_flush_buffers( p_sys->p_context );
441 if( p_block->i_flags & BLOCK_FLAG_PREROLL )
443 /* Do not care about late frames when prerolling
444 * TODO avoid decoding of non reference frame
445 * (ie all B except for H264 where it depends only on nal_ref_idc) */
446 p_sys->i_late_frames = 0;
449 if( !p_dec->b_pace_control && (p_sys->i_late_frames > 0) &&
450 (mdate() - p_sys->i_late_frames_start > INT64_C(5000000)) )
454 msg_Err( p_dec, "more than 5 seconds of late video -> "
455 "dropping frame (computer too slow ?)" );
456 p_sys->i_pts = 0; /* To make sure we recover properly */
458 block_Release( p_block );
459 p_sys->i_late_frames--;
463 if( p_block->i_pts > 0 || p_block->i_dts > 0 )
465 p_sys->input_pts = p_block->i_pts;
466 p_sys->input_dts = p_block->i_dts;
468 /* Make sure we don't reuse the same timestamps twice */
469 p_block->i_pts = p_block->i_dts = 0;
472 /* A good idea could be to decode all I pictures and see for the other */
473 if( !p_dec->b_pace_control &&
475 (p_sys->i_late_frames > 4) )
478 if( p_sys->i_late_frames < 12 )
480 p_sys->p_context->skip_frame =
481 (p_sys->i_skip_frame <= AVDISCARD_BIDIR) ?
482 AVDISCARD_BIDIR : p_sys->i_skip_frame;
486 /* picture too late, won't decode
487 * but break picture until a new I, and for mpeg4 ...*/
488 p_sys->i_late_frames--; /* needed else it will never be decrease */
489 block_Release( p_block );
496 if( p_sys->b_hurry_up )
497 p_sys->p_context->skip_frame = p_sys->i_skip_frame;
498 if( !(p_block->i_flags & BLOCK_FLAG_PREROLL) )
504 if( p_sys->p_context->width <= 0 || p_sys->p_context->height <= 0 )
506 if( p_sys->b_hurry_up )
507 p_sys->p_context->skip_frame = p_sys->i_skip_frame;
512 * Do the actual decoding now
515 /* Don't forget that ffmpeg requires a little more bytes
516 * that the real frame size */
517 if( p_block->i_buffer > 0 )
519 p_sys->b_flush = ( p_block->i_flags & BLOCK_FLAG_END_OF_SEQUENCE ) != 0;
521 p_sys->i_buffer = p_block->i_buffer;
522 if( p_sys->i_buffer + FF_INPUT_BUFFER_PADDING_SIZE >
523 p_sys->i_buffer_orig )
525 free( p_sys->p_buffer_orig );
526 p_sys->i_buffer_orig =
527 p_block->i_buffer + FF_INPUT_BUFFER_PADDING_SIZE;
528 p_sys->p_buffer_orig = malloc( p_sys->i_buffer_orig );
530 p_sys->p_buffer = p_sys->p_buffer_orig;
531 p_sys->i_buffer = p_block->i_buffer;
532 if( !p_sys->p_buffer )
534 block_Release( p_block );
537 vlc_memcpy( p_sys->p_buffer, p_block->p_buffer, p_block->i_buffer );
538 memset( p_sys->p_buffer + p_block->i_buffer, 0,
539 FF_INPUT_BUFFER_PADDING_SIZE );
541 p_block->i_buffer = 0;
544 while( p_sys->i_buffer > 0 || p_sys->b_flush )
546 int i_used, b_gotpicture;
549 i_used = avcodec_decode_video( p_sys->p_context, p_sys->p_ff_pic,
551 p_sys->i_buffer <= 0 && p_sys->b_flush ? NULL : (uint8_t*)p_sys->p_buffer, p_sys->i_buffer );
553 if( b_null_size && p_sys->p_context->width > 0 &&
554 p_sys->p_context->height > 0 &&
557 /* Reparse it to not drop the I frame */
559 if( p_sys->b_hurry_up )
560 p_sys->p_context->skip_frame = p_sys->i_skip_frame;
561 i_used = avcodec_decode_video( p_sys->p_context, p_sys->p_ff_pic,
563 (uint8_t*)p_sys->p_buffer, p_sys->i_buffer );
567 p_sys->b_first_frame = true;
569 if( p_sys->i_buffer <= 0 )
570 p_sys->b_flush = false;
574 msg_Warn( p_dec, "cannot decode one frame (%d bytes)",
576 block_Release( p_block );
579 else if( i_used > p_sys->i_buffer )
581 i_used = p_sys->i_buffer;
585 p_sys->i_buffer -= i_used;
586 p_sys->p_buffer += i_used;
588 /* Nothing to display */
591 if( i_used == 0 ) break;
596 if( p_sys->p_ff_pic->pts )
597 p_sys->i_pts = p_sys->p_ff_pic->pts;
599 /* Update frame late count (except when doing preroll) */
600 if( p_sys->i_pts && decoder_GetDisplayDate(p_dec, p_sys->i_pts) <= mdate() &&
601 !(p_block->i_flags & BLOCK_FLAG_PREROLL) )
603 p_sys->i_late_frames++;
604 if( p_sys->i_late_frames == 1 )
605 p_sys->i_late_frames_start = mdate();
609 p_sys->i_late_frames = 0;
612 if( !b_drawpicture || !p_sys->p_ff_pic->linesize[0] )
614 /* Do not display the picture */
615 p_pic = (picture_t *)p_sys->p_ff_pic->opaque;
616 if( !b_drawpicture && p_pic )
617 p_dec->pf_vout_buffer_del( p_dec, p_pic );
619 ffmpeg_NextPts( p_dec );
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;
642 /* Sanity check (seems to be needed for some streams) */
643 if( p_sys->p_ff_pic->pict_type == FF_B_TYPE )
645 p_sys->b_has_b_frames = true;
648 if( !p_dec->fmt_in.video.i_aspect )
650 /* Fetch again the aspect ratio in case it changed */
651 p_dec->fmt_out.video.i_aspect =
653 * ( av_q2d(p_sys->p_context->sample_aspect_ratio)
654 * p_sys->p_context->width / p_sys->p_context->height );
655 p_dec->fmt_out.video.i_sar_num
656 = p_sys->p_context->sample_aspect_ratio.num;
657 p_dec->fmt_out.video.i_sar_den
658 = p_sys->p_context->sample_aspect_ratio.den;
660 if( p_dec->fmt_out.video.i_aspect == 0 )
662 p_dec->fmt_out.video.i_aspect = VOUT_ASPECT_FACTOR
663 * p_sys->p_context->width / p_sys->p_context->height;
667 /* Send decoded frame to vout */
671 p_pic->date = p_sys->i_pts;
673 ffmpeg_NextPts( p_dec );
675 if( p_sys->b_first_frame )
677 /* Hack to force display of still pictures */
678 p_sys->b_first_frame = false;
679 p_pic->b_force = true;
682 p_pic->i_nb_fields = 2 + p_sys->p_ff_pic->repeat_pict;
683 p_pic->b_progressive = !p_sys->p_ff_pic->interlaced_frame;
684 p_pic->b_top_field_first = p_sys->p_ff_pic->top_field_first;
686 p_pic->i_qstride = p_sys->p_ff_pic->qstride;
687 int i_mb_h = ( p_pic->format.i_height + 15 ) / 16;
688 p_pic->p_q = malloc( p_pic->i_qstride * i_mb_h );
689 memcpy( p_pic->p_q, p_sys->p_ff_pic->qscale_table,
690 p_pic->i_qstride * i_mb_h );
691 switch( p_sys->p_ff_pic->qscale_type )
693 case FF_QSCALE_TYPE_MPEG1:
694 p_pic->i_qtype = QTYPE_MPEG1;
696 case FF_QSCALE_TYPE_MPEG2:
697 p_pic->i_qtype = QTYPE_MPEG2;
699 case FF_QSCALE_TYPE_H264:
700 p_pic->i_qtype = QTYPE_H264;
708 p_dec->pf_vout_buffer_del( p_dec, p_pic );
712 block_Release( p_block );
716 /*****************************************************************************
717 * EndVideo: decoder destruction
718 *****************************************************************************
719 * This function is called when the thread ends after a successful
721 *****************************************************************************/
722 void EndVideoDec( decoder_t *p_dec )
724 decoder_sys_t *p_sys = p_dec->p_sys;
726 if( p_sys->p_ff_pic ) av_free( p_sys->p_ff_pic );
727 free( p_sys->p_buffer_orig );
730 /*****************************************************************************
731 * ffmpeg_InitCodec: setup codec extra initialization data for ffmpeg
732 *****************************************************************************/
733 static void ffmpeg_InitCodec( decoder_t *p_dec )
735 decoder_sys_t *p_sys = p_dec->p_sys;
736 int i_size = p_dec->fmt_in.i_extra;
738 if( !i_size ) return;
740 if( p_sys->i_codec_id == CODEC_ID_SVQ3 )
744 p_sys->p_context->extradata_size = i_size + 12;
745 p = p_sys->p_context->extradata =
746 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 );
787 if( p_sys->p_context->extradata )
789 memcpy( p_sys->p_context->extradata,
790 p_dec->fmt_in.p_extra, p_dec->fmt_in.i_extra );
791 p_sys->p_context->sub_id = ((uint32_t*)p_dec->fmt_in.p_extra)[1];
793 msg_Warn( p_dec, "using extra data for RV codec sub_id=%08x",
794 p_sys->p_context->sub_id );
800 p_sys->p_context->extradata_size = i_size;
801 p_sys->p_context->extradata =
802 malloc( i_size + FF_INPUT_BUFFER_PADDING_SIZE );
803 if( p_sys->p_context->extradata )
805 memcpy( p_sys->p_context->extradata,
806 p_dec->fmt_in.p_extra, i_size );
807 memset( &((uint8_t*)p_sys->p_context->extradata)[i_size],
808 0, FF_INPUT_BUFFER_PADDING_SIZE );
813 /*****************************************************************************
814 * ffmpeg_CopyPicture: copy a picture from ffmpeg internal buffers to a
815 * picture_t structure (when not in direct rendering mode).
816 *****************************************************************************/
817 static void ffmpeg_CopyPicture( decoder_t *p_dec,
818 picture_t *p_pic, AVFrame *p_ff_pic )
820 decoder_sys_t *p_sys = p_dec->p_sys;
822 if( TestFfmpegChroma( p_sys->p_context->pix_fmt, -1 ) == VLC_SUCCESS )
824 int i_plane, i_size, i_line;
825 uint8_t *p_dst, *p_src;
826 int i_src_stride, i_dst_stride;
828 for( i_plane = 0; i_plane < p_pic->i_planes; i_plane++ )
830 p_src = p_ff_pic->data[i_plane];
831 p_dst = p_pic->p[i_plane].p_pixels;
832 i_src_stride = p_ff_pic->linesize[i_plane];
833 i_dst_stride = p_pic->p[i_plane].i_pitch;
835 i_size = __MIN( i_src_stride, i_dst_stride );
836 for( i_line = 0; i_line < p_pic->p[i_plane].i_visible_lines;
839 vlc_memcpy( p_dst, p_src, i_size );
840 p_src += i_src_stride;
841 p_dst += i_dst_stride;
847 msg_Err( p_dec, "don't know how to convert chroma %i",
848 p_sys->p_context->pix_fmt );
853 /*****************************************************************************
854 * ffmpeg_GetFrameBuf: callback used by ffmpeg to get a frame buffer.
855 *****************************************************************************
856 * It is used for direct rendering as well as to get the right PTS for each
857 * decoded picture (even in indirect rendering mode).
858 *****************************************************************************/
859 static void ffmpeg_SetFrameBufferPts( decoder_t *p_dec, AVFrame *p_ff_pic );
861 static int ffmpeg_GetFrameBuf( struct AVCodecContext *p_context,
864 decoder_t *p_dec = (decoder_t *)p_context->opaque;
865 decoder_sys_t *p_sys = p_dec->p_sys;
868 /* Set picture PTS */
869 ffmpeg_SetFrameBufferPts( p_dec, p_ff_pic );
872 p_ff_pic->opaque = 0;
874 /* Not much to do in indirect rendering mode */
875 if( !p_sys->b_direct_rendering )
877 return avcodec_default_get_buffer( p_context, p_ff_pic );
880 /* Some codecs set pix_fmt only after the 1st frame has been decoded,
881 * so we need to check for direct rendering again. */
883 int i_width = p_sys->p_context->width;
884 int i_height = p_sys->p_context->height;
885 avcodec_align_dimensions( p_sys->p_context, &i_width, &i_height );
887 if( GetVlcChroma( &p_dec->fmt_out.video, p_context->pix_fmt ) != VLC_SUCCESS ||
888 p_sys->p_context->width % 16 || p_sys->p_context->height % 16 ||
889 /* We only pad picture up to 16 */
890 PAD(p_sys->p_context->width,16) < i_width || PAD(p_sys->p_context->height,16) < i_height ||
891 p_context->pix_fmt == PIX_FMT_PAL8 )
893 msg_Dbg( p_dec, "disabling direct rendering" );
894 p_sys->b_direct_rendering = 0;
895 return avcodec_default_get_buffer( p_context, p_ff_pic );
897 p_dec->fmt_out.i_codec = p_dec->fmt_out.video.i_chroma;
899 /* Get a new picture */
900 //p_sys->p_vout->render.b_allow_modify_pics = 0;
901 p_pic = ffmpeg_NewPictBuf( p_dec, p_sys->p_context );
904 p_sys->b_direct_rendering = 0;
905 return avcodec_default_get_buffer( p_context, p_ff_pic );
907 p_sys->p_context->draw_horiz_band = NULL;
909 p_ff_pic->opaque = (void*)p_pic;
910 p_ff_pic->type = FF_BUFFER_TYPE_USER;
911 p_ff_pic->data[0] = p_pic->p[0].p_pixels;
912 p_ff_pic->data[1] = p_pic->p[1].p_pixels;
913 p_ff_pic->data[2] = p_pic->p[2].p_pixels;
914 p_ff_pic->data[3] = NULL; /* alpha channel but I'm not sure */
916 p_ff_pic->linesize[0] = p_pic->p[0].i_pitch;
917 p_ff_pic->linesize[1] = p_pic->p[1].i_pitch;
918 p_ff_pic->linesize[2] = p_pic->p[2].i_pitch;
919 p_ff_pic->linesize[3] = 0;
921 if( p_ff_pic->reference != 0 )
923 p_dec->pf_picture_link( p_dec, p_pic );
926 /* FIXME what is that, should give good value */
927 p_ff_pic->age = 256*256*256*64; // FIXME FIXME from ffmpeg
931 static int ffmpeg_ReGetFrameBuf( struct AVCodecContext *p_context, AVFrame *p_ff_pic )
933 decoder_t *p_dec = (decoder_t *)p_context->opaque;
937 p_ff_pic->pts = AV_NOPTS_VALUE;
939 /* We always use default reget function, it works perfectly fine */
940 i_ret = avcodec_default_reget_buffer( p_context, p_ff_pic );
942 /* Set picture PTS if avcodec_default_reget_buffer didn't set it (through a
943 * ffmpeg_GetFrameBuf call) */
944 if( !i_ret && p_ff_pic->pts == AV_NOPTS_VALUE )
945 ffmpeg_SetFrameBufferPts( p_dec, p_ff_pic );
950 static void ffmpeg_SetFrameBufferPts( decoder_t *p_dec, AVFrame *p_ff_pic )
952 decoder_sys_t *p_sys = p_dec->p_sys;
954 /* Set picture PTS */
955 if( p_sys->input_pts )
957 p_ff_pic->pts = p_sys->input_pts;
959 else if( p_sys->input_dts )
961 /* Some demuxers only set the dts so let's try to find a useful
962 * timestamp from this */
963 if( !p_sys->p_context->has_b_frames || !p_sys->b_has_b_frames ||
964 !p_ff_pic->reference || !p_sys->i_pts )
966 p_ff_pic->pts = p_sys->input_dts;
978 if( p_sys->i_pts ) /* make sure 1st frame has a pts > 0 */
980 p_sys->input_pts = p_sys->input_dts = 0;
984 static void ffmpeg_ReleaseFrameBuf( struct AVCodecContext *p_context,
987 decoder_t *p_dec = (decoder_t *)p_context->opaque;
990 if( !p_ff_pic->opaque )
992 avcodec_default_release_buffer( p_context, p_ff_pic );
996 p_pic = (picture_t*)p_ff_pic->opaque;
998 p_ff_pic->data[0] = NULL;
999 p_ff_pic->data[1] = NULL;
1000 p_ff_pic->data[2] = NULL;
1001 p_ff_pic->data[3] = NULL;
1003 if( p_ff_pic->reference != 0 )
1005 p_dec->pf_picture_unlink( p_dec, p_pic );
1009 static void ffmpeg_NextPts( decoder_t *p_dec )
1011 decoder_sys_t *p_sys = p_dec->p_sys;
1013 if( p_sys->i_pts <= 0 )
1016 /* interpolate the next PTS */
1017 if( p_dec->fmt_in.video.i_frame_rate > 0 &&
1018 p_dec->fmt_in.video.i_frame_rate_base > 0 )
1020 p_sys->i_pts += INT64_C(1000000) *
1021 (2 + p_sys->p_ff_pic->repeat_pict) *
1022 p_dec->fmt_in.video.i_frame_rate_base /
1023 (2 * p_dec->fmt_in.video.i_frame_rate);
1025 else if( p_sys->p_context->time_base.den > 0 )
1027 p_sys->i_pts += INT64_C(1000000) *
1028 (2 + p_sys->p_ff_pic->repeat_pict) *
1029 p_sys->p_context->time_base.num /
1030 (2 * p_sys->p_context->time_base.den);