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>
34 #include <vlc_codecs.h> /* BITMAPINFOHEADER */
35 #include <vlc_avcodec.h>
38 #ifdef HAVE_LIBAVCODEC_AVCODEC_H
39 # include <libavcodec/avcodec.h>
40 #elif defined(HAVE_FFMPEG_AVCODEC_H)
41 # include <ffmpeg/avcodec.h>
48 /*****************************************************************************
49 * decoder_sys_t : decoder descriptor
50 *****************************************************************************/
55 /* Video decoder specific part */
62 /* for frame skipping algo */
64 enum AVDiscard i_skip_frame;
65 enum AVDiscard i_skip_idct;
67 /* how many decoded frames are late */
69 mtime_t i_late_frames_start;
71 /* for direct rendering */
72 bool b_direct_rendering;
76 /* Hack to force display of still pictures */
79 int i_buffer_orig, i_buffer;
80 char *p_buffer_orig, *p_buffer;
83 AVPaletteControl palette;
89 /* FIXME (dummy palette for now) */
90 static const AVPaletteControl palette_control;
92 /*****************************************************************************
94 *****************************************************************************/
95 static void ffmpeg_InitCodec ( decoder_t * );
96 static int ffmpeg_OpenCodec ( decoder_t * );
97 static void ffmpeg_CopyPicture ( decoder_t *, picture_t *, AVFrame * );
98 static int ffmpeg_GetFrameBuf ( struct AVCodecContext *, AVFrame * );
99 static int ffmpeg_ReGetFrameBuf( struct AVCodecContext *, AVFrame * );
100 static void ffmpeg_ReleaseFrameBuf( struct AVCodecContext *, AVFrame * );
101 static void ffmpeg_NextPts( decoder_t * );
103 static uint32_t ffmpeg_CodecTag( vlc_fourcc_t fcc )
105 uint8_t *p = (uint8_t*)&fcc;
106 return p[0] | (p[1] << 8) | (p[2] << 16) | (p[3] << 24);
109 /*****************************************************************************
111 *****************************************************************************/
113 /* Returns a new picture buffer */
114 static inline picture_t *ffmpeg_NewPictBuf( decoder_t *p_dec,
115 AVCodecContext *p_context )
119 p_dec->fmt_out.video.i_width = p_context->width;
120 p_dec->fmt_out.video.i_height = p_context->height;
122 if( !p_context->width || !p_context->height )
124 return NULL; /* invalid display size */
127 if( GetVlcChroma( &p_dec->fmt_out.video, p_context->pix_fmt ) != VLC_SUCCESS )
129 /* we are doomed, but not really, because most codecs set their pix_fmt much later */
130 p_dec->fmt_out.i_codec = VLC_CODEC_I420;
132 p_dec->fmt_out.i_codec = p_dec->fmt_out.video.i_chroma;
134 /* If an aspect-ratio was specified in the input format then force it */
135 if( p_dec->fmt_in.video.i_aspect )
137 p_dec->fmt_out.video.i_aspect = p_dec->fmt_in.video.i_aspect;
141 p_dec->fmt_out.video.i_aspect =
142 VOUT_ASPECT_FACTOR * ( av_q2d(p_context->sample_aspect_ratio) *
143 p_context->width / p_context->height );
144 p_dec->fmt_out.video.i_sar_num = p_context->sample_aspect_ratio.num;
145 p_dec->fmt_out.video.i_sar_den = p_context->sample_aspect_ratio.den;
147 if( p_dec->fmt_out.video.i_aspect == 0 )
149 p_dec->fmt_out.video.i_aspect =
150 VOUT_ASPECT_FACTOR * p_context->width / p_context->height;
154 if( p_dec->fmt_in.video.i_frame_rate > 0 &&
155 p_dec->fmt_in.video.i_frame_rate_base > 0 )
157 p_dec->fmt_out.video.i_frame_rate =
158 p_dec->fmt_in.video.i_frame_rate;
159 p_dec->fmt_out.video.i_frame_rate_base =
160 p_dec->fmt_in.video.i_frame_rate_base;
162 else if( p_context->time_base.num > 0 && p_context->time_base.den > 0 )
164 p_dec->fmt_out.video.i_frame_rate = p_context->time_base.den;
165 p_dec->fmt_out.video.i_frame_rate_base = p_context->time_base.num;
168 p_pic = decoder_NewPicture( p_dec );
173 /*****************************************************************************
174 * InitVideo: initialize the video decoder
175 *****************************************************************************
176 * the ffmpeg codec will be opened, some memory allocated. The vout is not yet
177 * opened (done after the first decoded frame).
178 *****************************************************************************/
179 int InitVideoDec( decoder_t *p_dec, AVCodecContext *p_context,
180 AVCodec *p_codec, int i_codec_id, const char *psz_namecodec )
182 decoder_sys_t *p_sys;
185 /* Allocate the memory needed to store the decoder's structure */
186 if( ( p_dec->p_sys = p_sys = calloc( 1, sizeof(decoder_sys_t) ) ) == NULL )
189 p_sys->p_context = p_context;
190 p_sys->p_codec = p_codec;
191 p_sys->i_codec_id = i_codec_id;
192 p_sys->psz_namecodec = psz_namecodec;
193 p_sys->p_ff_pic = avcodec_alloc_frame();
194 p_sys->b_delayed_open = true;
196 /* ***** Fill p_context with init values ***** */
197 p_sys->p_context->codec_tag = ffmpeg_CodecTag( p_dec->fmt_in.i_original_fourcc ?: p_dec->fmt_in.i_codec );
199 /* ***** Get configuration of ffmpeg plugin ***** */
200 p_sys->p_context->workaround_bugs =
201 config_GetInt( p_dec, "ffmpeg-workaround-bugs" );
202 #if LIBAVCODEC_VERSION_INT < ((52<<16)+(0<<8)+0)
203 p_sys->p_context->error_resilience =
204 config_GetInt( p_dec, "ffmpeg-error-resilience" );
206 p_sys->p_context->error_recognition =
207 config_GetInt( p_dec, "ffmpeg-error-resilience" );
210 var_Create( p_dec, "grayscale", VLC_VAR_BOOL | VLC_VAR_DOINHERIT );
211 var_Get( p_dec, "grayscale", &val );
212 if( val.b_bool ) p_sys->p_context->flags |= CODEC_FLAG_GRAY;
214 var_Create( p_dec, "ffmpeg-vismv", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT );
215 var_Get( p_dec, "ffmpeg-vismv", &val );
216 if( val.i_int ) p_sys->p_context->debug_mv = val.i_int;
218 var_Create( p_dec, "ffmpeg-lowres", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT );
219 var_Get( p_dec, "ffmpeg-lowres", &val );
220 if( val.i_int > 0 && val.i_int <= 2 ) p_sys->p_context->lowres = val.i_int;
222 var_Create( p_dec, "ffmpeg-skiploopfilter",
223 VLC_VAR_INTEGER | VLC_VAR_DOINHERIT );
224 var_Get( p_dec, "ffmpeg-skiploopfilter", &val );
225 if( val.i_int > 0 ) p_sys->p_context->skip_loop_filter = AVDISCARD_NONREF;
226 if( val.i_int > 1 ) p_sys->p_context->skip_loop_filter = AVDISCARD_BIDIR;
227 if( val.i_int > 2 ) p_sys->p_context->skip_loop_filter = AVDISCARD_NONKEY;
228 if( val.i_int > 3 ) p_sys->p_context->skip_loop_filter = AVDISCARD_ALL;
230 bool b_fast = var_CreateGetBool( p_dec, "ffmpeg-fast" );
231 if( b_fast ) p_sys->p_context->flags2 |= CODEC_FLAG2_FAST;
233 /* ***** ffmpeg frame skipping ***** */
234 var_Create( p_dec, "ffmpeg-hurry-up", VLC_VAR_BOOL | VLC_VAR_DOINHERIT );
235 var_Get( p_dec, "ffmpeg-hurry-up", &val );
236 p_sys->b_hurry_up = val.b_bool;
238 var_Create( p_dec, "ffmpeg-skip-frame", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT );
239 var_Get( p_dec, "ffmpeg-skip-frame", &val );
243 p_sys->p_context->skip_frame = AVDISCARD_NONE;
246 p_sys->p_context->skip_frame = AVDISCARD_DEFAULT;
249 p_sys->p_context->skip_frame = AVDISCARD_BIDIR;
252 p_sys->p_context->skip_frame = AVDISCARD_NONKEY;
255 p_sys->p_context->skip_frame = AVDISCARD_ALL;
258 p_sys->p_context->skip_frame = AVDISCARD_NONE;
261 p_sys->i_skip_frame = p_sys->p_context->skip_frame;
263 var_Create( p_dec, "ffmpeg-skip-idct", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT );
264 var_Get( p_dec, "ffmpeg-skip-idct", &val );
268 p_sys->p_context->skip_idct = AVDISCARD_NONE;
271 p_sys->p_context->skip_idct = AVDISCARD_DEFAULT;
274 p_sys->p_context->skip_idct = AVDISCARD_BIDIR;
277 p_sys->p_context->skip_idct = AVDISCARD_NONKEY;
280 p_sys->p_context->skip_idct = AVDISCARD_ALL;
283 p_sys->p_context->skip_idct = AVDISCARD_NONE;
286 p_sys->i_skip_idct = p_sys->p_context->skip_idct;
288 /* ***** ffmpeg direct rendering ***** */
289 p_sys->b_direct_rendering = false;
290 var_Create( p_dec, "ffmpeg-dr", VLC_VAR_BOOL | VLC_VAR_DOINHERIT );
291 var_Get( p_dec, "ffmpeg-dr", &val );
292 if( val.b_bool && (p_sys->p_codec->capabilities & CODEC_CAP_DR1) &&
293 /* Apparently direct rendering doesn't work with YUV422P */
294 p_sys->p_context->pix_fmt != PIX_FMT_YUV422P &&
295 /* H264 uses too many reference frames */
296 p_sys->i_codec_id != CODEC_ID_H264 &&
297 /* No idea why ... but this fixes flickering on some TSCC streams */
298 p_sys->i_codec_id != CODEC_ID_TSCC &&
299 !p_sys->p_context->debug_mv )
301 /* Some codecs set pix_fmt only after the 1st frame has been decoded,
302 * so we need to do another check in ffmpeg_GetFrameBuf() */
303 p_sys->b_direct_rendering = true;
306 /* ffmpeg doesn't properly release old pictures when frames are skipped */
307 //if( p_sys->b_hurry_up ) p_sys->b_direct_rendering = false;
308 if( p_sys->b_direct_rendering )
310 msg_Dbg( p_dec, "using direct rendering" );
311 p_sys->p_context->flags |= CODEC_FLAG_EMU_EDGE;
314 /* Always use our get_buffer wrapper so we can calculate the
316 p_sys->p_context->get_buffer = ffmpeg_GetFrameBuf;
317 p_sys->p_context->reget_buffer = ffmpeg_ReGetFrameBuf;
318 p_sys->p_context->release_buffer = ffmpeg_ReleaseFrameBuf;
319 p_sys->p_context->opaque = p_dec;
321 /* ***** misc init ***** */
322 p_sys->input_pts = p_sys->input_dts = 0;
324 p_sys->b_has_b_frames = false;
325 p_sys->b_first_frame = true;
326 p_sys->b_flush = false;
327 p_sys->i_late_frames = 0;
329 p_sys->i_buffer_orig = 1;
330 p_sys->p_buffer_orig = p_sys->p_buffer = malloc( p_sys->i_buffer_orig );
331 if( !p_sys->p_buffer_orig )
337 /* Set output properties */
338 p_dec->fmt_out.i_cat = VIDEO_ES;
339 if( GetVlcChroma( &p_dec->fmt_out.video, p_context->pix_fmt ) != VLC_SUCCESS )
341 /* we are doomed. but not really, because most codecs set their pix_fmt later on */
342 p_dec->fmt_out.i_codec = VLC_CODEC_I420;
344 p_dec->fmt_out.i_codec = p_dec->fmt_out.video.i_chroma;
347 memset( &p_sys->palette, 0, sizeof(p_sys->palette) );
348 if( p_dec->fmt_in.video.p_palette )
350 p_sys->palette.palette_changed = 1;
352 for( int i = 0; i < __MIN( AVPALETTE_COUNT, p_dec->fmt_in.video.p_palette->i_entries ); i++ )
358 c.a[0] = p_dec->fmt_in.video.p_palette->palette[i][0];
359 c.a[1] = p_dec->fmt_in.video.p_palette->palette[i][1];
360 c.a[2] = p_dec->fmt_in.video.p_palette->palette[i][2];
361 c.a[3] = p_dec->fmt_in.video.p_palette->palette[i][3];
363 p_sys->palette.palette[i] = c.u;
365 p_sys->p_context->palctrl = &p_sys->palette;
367 p_dec->fmt_out.video.p_palette = malloc( sizeof(video_palette_t) );
368 if( p_dec->fmt_out.video.p_palette )
369 *p_dec->fmt_out.video.p_palette = *p_dec->fmt_in.video.p_palette;
371 else if( p_sys->i_codec_id != CODEC_ID_MSVIDEO1 && p_sys->i_codec_id != CODEC_ID_CINEPAK )
373 p_sys->p_context->palctrl = &p_sys->palette;
376 /* ***** init this codec with special data ***** */
377 ffmpeg_InitCodec( p_dec );
379 /* ***** Open the codec ***** */
380 if( ffmpeg_OpenCodec( p_dec ) < 0 )
382 msg_Err( p_dec, "cannot open codec (%s)", p_sys->psz_namecodec );
383 free( p_sys->p_buffer_orig );
391 /*****************************************************************************
392 * DecodeVideo: Called to decode one or more frames
393 *****************************************************************************/
394 picture_t *DecodeVideo( decoder_t *p_dec, block_t **pp_block )
396 decoder_sys_t *p_sys = p_dec->p_sys;
398 int b_null_size = false;
401 if( !pp_block || !*pp_block )
404 if( !p_sys->p_context->extradata_size && p_dec->fmt_in.i_extra )
406 ffmpeg_InitCodec( p_dec );
407 if( p_sys->b_delayed_open )
409 if( ffmpeg_OpenCodec( p_dec ) )
410 msg_Err( p_dec, "cannot open codec (%s)", p_sys->psz_namecodec );
415 if( p_sys->b_delayed_open )
417 block_Release( p_block );
421 if( p_block->i_flags & (BLOCK_FLAG_DISCONTINUITY|BLOCK_FLAG_CORRUPTED) )
424 p_sys->i_pts = 0; /* To make sure we recover properly */
426 p_sys->input_pts = p_sys->input_dts = 0;
427 p_sys->i_late_frames = 0;
429 block_Release( p_block );
431 //if( p_block->i_flags & BLOCK_FLAG_CORRUPTED )
432 //avcodec_flush_buffers( p_sys->p_context );
436 if( p_block->i_flags & BLOCK_FLAG_PREROLL )
438 /* Do not care about late frames when prerolling
439 * TODO avoid decoding of non reference frame
440 * (ie all B except for H264 where it depends only on nal_ref_idc) */
441 p_sys->i_late_frames = 0;
444 if( !p_dec->b_pace_control && (p_sys->i_late_frames > 0) &&
445 (mdate() - p_sys->i_late_frames_start > INT64_C(5000000)) )
449 msg_Err( p_dec, "more than 5 seconds of late video -> "
450 "dropping frame (computer too slow ?)" );
451 p_sys->i_pts = 0; /* To make sure we recover properly */
453 block_Release( p_block );
454 p_sys->i_late_frames--;
458 if( p_block->i_pts > 0 || p_block->i_dts > 0 )
460 p_sys->input_pts = p_block->i_pts;
461 p_sys->input_dts = p_block->i_dts;
463 /* Make sure we don't reuse the same timestamps twice */
464 p_block->i_pts = p_block->i_dts = 0;
467 /* A good idea could be to decode all I pictures and see for the other */
468 if( !p_dec->b_pace_control &&
470 (p_sys->i_late_frames > 4) )
473 if( p_sys->i_late_frames < 12 )
475 p_sys->p_context->skip_frame =
476 (p_sys->i_skip_frame <= AVDISCARD_BIDIR) ?
477 AVDISCARD_BIDIR : p_sys->i_skip_frame;
481 /* picture too late, won't decode
482 * but break picture until a new I, and for mpeg4 ...*/
483 p_sys->i_late_frames--; /* needed else it will never be decrease */
484 block_Release( p_block );
491 if( p_sys->b_hurry_up )
492 p_sys->p_context->skip_frame = p_sys->i_skip_frame;
493 if( !(p_block->i_flags & BLOCK_FLAG_PREROLL) )
499 if( p_sys->p_context->width <= 0 || p_sys->p_context->height <= 0 )
501 if( p_sys->b_hurry_up )
502 p_sys->p_context->skip_frame = p_sys->i_skip_frame;
505 else if( !b_drawpicture )
507 /* It creates broken picture
508 * FIXME either our parser or ffmpeg is broken */
510 if( p_sys->b_hurry_up )
511 p_sys->p_context->skip_frame = __MAX( p_sys->p_context->skip_frame,
517 * Do the actual decoding now
520 /* Don't forget that ffmpeg requires a little more bytes
521 * that the real frame size */
522 if( p_block->i_buffer > 0 )
524 p_sys->b_flush = ( p_block->i_flags & BLOCK_FLAG_END_OF_SEQUENCE ) != 0;
526 p_sys->i_buffer = p_block->i_buffer;
527 if( p_sys->i_buffer + FF_INPUT_BUFFER_PADDING_SIZE >
528 p_sys->i_buffer_orig )
530 free( p_sys->p_buffer_orig );
531 p_sys->i_buffer_orig =
532 p_block->i_buffer + FF_INPUT_BUFFER_PADDING_SIZE;
533 p_sys->p_buffer_orig = malloc( p_sys->i_buffer_orig );
535 p_sys->p_buffer = p_sys->p_buffer_orig;
536 p_sys->i_buffer = p_block->i_buffer;
537 if( !p_sys->p_buffer )
539 block_Release( p_block );
542 vlc_memcpy( p_sys->p_buffer, p_block->p_buffer, p_block->i_buffer );
543 memset( p_sys->p_buffer + p_block->i_buffer, 0,
544 FF_INPUT_BUFFER_PADDING_SIZE );
546 p_block->i_buffer = 0;
549 while( p_sys->i_buffer > 0 || p_sys->b_flush )
551 int i_used, b_gotpicture;
554 i_used = avcodec_decode_video( p_sys->p_context, p_sys->p_ff_pic,
556 p_sys->i_buffer <= 0 && p_sys->b_flush ? NULL : (uint8_t*)p_sys->p_buffer, p_sys->i_buffer );
558 if( b_null_size && p_sys->p_context->width > 0 &&
559 p_sys->p_context->height > 0 &&
562 /* Reparse it to not drop the I frame */
564 if( p_sys->b_hurry_up )
565 p_sys->p_context->skip_frame = p_sys->i_skip_frame;
566 i_used = avcodec_decode_video( p_sys->p_context, p_sys->p_ff_pic,
568 (uint8_t*)p_sys->p_buffer, p_sys->i_buffer );
572 p_sys->b_first_frame = true;
574 if( p_sys->i_buffer <= 0 )
575 p_sys->b_flush = false;
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;
602 if( p_sys->p_ff_pic->pts )
603 p_sys->i_pts = p_sys->p_ff_pic->pts;
605 /* Update frame late count (except when doing preroll) */
606 mtime_t i_display_date = 0;
607 if( !(p_block->i_flags & BLOCK_FLAG_PREROLL) )
608 i_display_date = decoder_GetDisplayDate( p_dec, p_sys->i_pts );
610 if( i_display_date > 0 && i_display_date <= mdate() )
612 p_sys->i_late_frames++;
613 if( p_sys->i_late_frames == 1 )
614 p_sys->i_late_frames_start = mdate();
618 p_sys->i_late_frames = 0;
621 if( !b_drawpicture || !p_sys->p_ff_pic->linesize[0] )
623 /* Do not display the picture */
624 p_pic = (picture_t *)p_sys->p_ff_pic->opaque;
625 if( !b_drawpicture && p_pic )
626 decoder_DeletePicture( p_dec, p_pic );
628 ffmpeg_NextPts( p_dec );
632 if( !p_sys->p_ff_pic->opaque )
634 /* Get a new picture */
635 p_pic = ffmpeg_NewPictBuf( p_dec, p_sys->p_context );
638 block_Release( p_block );
642 /* Fill p_picture_t from AVVideoFrame and do chroma conversion
644 ffmpeg_CopyPicture( p_dec, p_pic, p_sys->p_ff_pic );
648 p_pic = (picture_t *)p_sys->p_ff_pic->opaque;
651 /* Sanity check (seems to be needed for some streams) */
652 if( p_sys->p_ff_pic->pict_type == FF_B_TYPE )
654 p_sys->b_has_b_frames = true;
657 if( !p_dec->fmt_in.video.i_aspect )
659 /* Fetch again the aspect ratio in case it changed */
660 p_dec->fmt_out.video.i_aspect =
662 * ( av_q2d(p_sys->p_context->sample_aspect_ratio)
663 * p_sys->p_context->width / p_sys->p_context->height );
664 p_dec->fmt_out.video.i_sar_num
665 = p_sys->p_context->sample_aspect_ratio.num;
666 p_dec->fmt_out.video.i_sar_den
667 = p_sys->p_context->sample_aspect_ratio.den;
669 if( p_dec->fmt_out.video.i_aspect == 0 )
671 p_dec->fmt_out.video.i_aspect = VOUT_ASPECT_FACTOR
672 * p_sys->p_context->width / p_sys->p_context->height;
676 /* Send decoded frame to vout */
679 p_pic->date = p_sys->i_pts;
681 ffmpeg_NextPts( p_dec );
683 if( p_sys->b_first_frame )
685 /* Hack to force display of still pictures */
686 p_sys->b_first_frame = false;
687 p_pic->b_force = true;
690 p_pic->i_nb_fields = 2 + p_sys->p_ff_pic->repeat_pict;
691 p_pic->b_progressive = !p_sys->p_ff_pic->interlaced_frame;
692 p_pic->b_top_field_first = p_sys->p_ff_pic->top_field_first;
694 p_pic->i_qstride = p_sys->p_ff_pic->qstride;
695 int i_mb_h = ( p_pic->format.i_height + 15 ) / 16;
696 p_pic->p_q = malloc( p_pic->i_qstride * i_mb_h );
697 memcpy( p_pic->p_q, p_sys->p_ff_pic->qscale_table,
698 p_pic->i_qstride * i_mb_h );
699 switch( p_sys->p_ff_pic->qscale_type )
701 case FF_QSCALE_TYPE_MPEG1:
702 p_pic->i_qtype = QTYPE_MPEG1;
704 case FF_QSCALE_TYPE_MPEG2:
705 p_pic->i_qtype = QTYPE_MPEG2;
707 case FF_QSCALE_TYPE_H264:
708 p_pic->i_qtype = QTYPE_H264;
716 decoder_DeletePicture( p_dec, p_pic );
720 block_Release( p_block );
724 /*****************************************************************************
725 * EndVideo: decoder destruction
726 *****************************************************************************
727 * This function is called when the thread ends after a successful
729 *****************************************************************************/
730 void EndVideoDec( decoder_t *p_dec )
732 decoder_sys_t *p_sys = p_dec->p_sys;
734 if( p_sys->p_ff_pic ) av_free( p_sys->p_ff_pic );
735 free( p_sys->p_buffer_orig );
738 /*****************************************************************************
739 * ffmpeg_InitCodec: setup codec extra initialization data for ffmpeg
740 *****************************************************************************/
741 static void ffmpeg_InitCodec( decoder_t *p_dec )
743 decoder_sys_t *p_sys = p_dec->p_sys;
744 int i_size = p_dec->fmt_in.i_extra;
746 if( !i_size ) return;
748 if( p_sys->i_codec_id == CODEC_ID_SVQ3 )
752 p_sys->p_context->extradata_size = i_size + 12;
753 p = p_sys->p_context->extradata =
754 malloc( p_sys->p_context->extradata_size );
758 memcpy( &p[0], "SVQ3", 4 );
759 memset( &p[4], 0, 8 );
760 memcpy( &p[12], p_dec->fmt_in.p_extra, i_size );
762 /* Now remove all atoms before the SMI one */
763 if( p_sys->p_context->extradata_size > 0x5a &&
764 strncmp( (char*)&p[0x56], "SMI ", 4 ) )
766 uint8_t *psz = &p[0x52];
768 while( psz < &p[p_sys->p_context->extradata_size - 8] )
770 int i_size = GetDWBE( psz );
773 /* FIXME handle 1 as long size */
776 if( !strncmp( (char*)&psz[4], "SMI ", 4 ) )
778 memmove( &p[0x52], psz,
779 &p[p_sys->p_context->extradata_size] - psz );
789 p_sys->p_context->extradata_size = i_size;
790 p_sys->p_context->extradata =
791 malloc( i_size + FF_INPUT_BUFFER_PADDING_SIZE );
792 if( p_sys->p_context->extradata )
794 memcpy( p_sys->p_context->extradata,
795 p_dec->fmt_in.p_extra, i_size );
796 memset( &((uint8_t*)p_sys->p_context->extradata)[i_size],
797 0, FF_INPUT_BUFFER_PADDING_SIZE );
802 /*****************************************************************************
804 *****************************************************************************/
805 static int ffmpeg_OpenCodec( decoder_t *p_dec )
807 decoder_sys_t *p_sys = p_dec->p_sys;
809 if( p_sys->p_context->extradata_size <= 0 )
811 if( p_sys->i_codec_id == CODEC_ID_VC1 ||
812 p_sys->i_codec_id == CODEC_ID_VORBIS ||
813 p_sys->i_codec_id == CODEC_ID_THEORA )
815 msg_Warn( p_dec, "waiting for extra data for codec %s",
816 p_sys->psz_namecodec );
820 p_sys->p_context->width = p_dec->fmt_in.video.i_width;
821 p_sys->p_context->height = p_dec->fmt_in.video.i_height;
822 #if LIBAVCODEC_VERSION_INT < ((52<<16)+(0<<8)+0)
823 p_sys->p_context->bits_per_sample = p_dec->fmt_in.video.i_bits_per_pixel;
825 p_sys->p_context->bits_per_coded_sample = p_dec->fmt_in.video.i_bits_per_pixel;
830 ret = avcodec_open( p_sys->p_context, p_sys->p_codec );
831 vlc_avcodec_unlock();
834 msg_Dbg( p_dec, "ffmpeg codec (%s) started", p_sys->psz_namecodec );
836 p_sys->b_delayed_open = false;
840 /*****************************************************************************
841 * ffmpeg_CopyPicture: copy a picture from ffmpeg internal buffers to a
842 * picture_t structure (when not in direct rendering mode).
843 *****************************************************************************/
844 static void ffmpeg_CopyPicture( decoder_t *p_dec,
845 picture_t *p_pic, AVFrame *p_ff_pic )
847 decoder_sys_t *p_sys = p_dec->p_sys;
849 if( TestFfmpegChroma( p_sys->p_context->pix_fmt, -1 ) == VLC_SUCCESS )
851 int i_plane, i_size, i_line;
852 uint8_t *p_dst, *p_src;
853 int i_src_stride, i_dst_stride;
855 for( i_plane = 0; i_plane < p_pic->i_planes; i_plane++ )
857 p_src = p_ff_pic->data[i_plane];
858 p_dst = p_pic->p[i_plane].p_pixels;
859 i_src_stride = p_ff_pic->linesize[i_plane];
860 i_dst_stride = p_pic->p[i_plane].i_pitch;
862 i_size = __MIN( i_src_stride, i_dst_stride );
863 for( i_line = 0; i_line < p_pic->p[i_plane].i_visible_lines;
866 vlc_memcpy( p_dst, p_src, i_size );
867 p_src += i_src_stride;
868 p_dst += i_dst_stride;
874 msg_Err( p_dec, "don't know how to convert chroma %i",
875 p_sys->p_context->pix_fmt );
880 /*****************************************************************************
881 * ffmpeg_GetFrameBuf: callback used by ffmpeg to get a frame buffer.
882 *****************************************************************************
883 * It is used for direct rendering as well as to get the right PTS for each
884 * decoded picture (even in indirect rendering mode).
885 *****************************************************************************/
886 static void ffmpeg_SetFrameBufferPts( decoder_t *p_dec, AVFrame *p_ff_pic );
888 static int ffmpeg_GetFrameBuf( struct AVCodecContext *p_context,
891 decoder_t *p_dec = (decoder_t *)p_context->opaque;
892 decoder_sys_t *p_sys = p_dec->p_sys;
895 /* Set picture PTS */
896 ffmpeg_SetFrameBufferPts( p_dec, p_ff_pic );
899 p_ff_pic->opaque = 0;
901 /* Not much to do in indirect rendering mode */
902 if( !p_sys->b_direct_rendering )
904 return avcodec_default_get_buffer( p_context, p_ff_pic );
907 /* Some codecs set pix_fmt only after the 1st frame has been decoded,
908 * so we need to check for direct rendering again. */
910 int i_width = p_sys->p_context->width;
911 int i_height = p_sys->p_context->height;
912 avcodec_align_dimensions( p_sys->p_context, &i_width, &i_height );
914 if( GetVlcChroma( &p_dec->fmt_out.video, p_context->pix_fmt ) != VLC_SUCCESS ||
915 p_sys->p_context->width % 16 || p_sys->p_context->height % 16 ||
916 /* We only pad picture up to 16 */
917 PAD(p_sys->p_context->width,16) < i_width || PAD(p_sys->p_context->height,16) < i_height ||
918 p_context->pix_fmt == PIX_FMT_PAL8 )
920 msg_Dbg( p_dec, "disabling direct rendering" );
921 p_sys->b_direct_rendering = false;
922 return avcodec_default_get_buffer( p_context, p_ff_pic );
924 p_dec->fmt_out.i_codec = p_dec->fmt_out.video.i_chroma;
926 /* Get a new picture */
927 //p_sys->p_vout->render.b_allow_modify_pics = 0;
928 p_pic = ffmpeg_NewPictBuf( p_dec, p_sys->p_context );
931 p_sys->b_direct_rendering = false;
932 return avcodec_default_get_buffer( p_context, p_ff_pic );
934 p_sys->p_context->draw_horiz_band = NULL;
936 p_ff_pic->opaque = (void*)p_pic;
937 p_ff_pic->type = FF_BUFFER_TYPE_USER;
938 p_ff_pic->data[0] = p_pic->p[0].p_pixels;
939 p_ff_pic->data[1] = p_pic->p[1].p_pixels;
940 p_ff_pic->data[2] = p_pic->p[2].p_pixels;
941 p_ff_pic->data[3] = NULL; /* alpha channel but I'm not sure */
943 p_ff_pic->linesize[0] = p_pic->p[0].i_pitch;
944 p_ff_pic->linesize[1] = p_pic->p[1].i_pitch;
945 p_ff_pic->linesize[2] = p_pic->p[2].i_pitch;
946 p_ff_pic->linesize[3] = 0;
948 decoder_LinkPicture( 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;
961 p_ff_pic->pts = AV_NOPTS_VALUE;
963 /* We always use default reget function, it works perfectly fine */
964 i_ret = avcodec_default_reget_buffer( p_context, p_ff_pic );
966 /* Set picture PTS if avcodec_default_reget_buffer didn't set it (through a
967 * ffmpeg_GetFrameBuf call) */
968 if( !i_ret && p_ff_pic->pts == AV_NOPTS_VALUE )
969 ffmpeg_SetFrameBufferPts( p_dec, p_ff_pic );
974 static void ffmpeg_SetFrameBufferPts( decoder_t *p_dec, AVFrame *p_ff_pic )
976 decoder_sys_t *p_sys = p_dec->p_sys;
978 /* Set picture PTS */
979 if( p_sys->input_pts )
981 p_ff_pic->pts = p_sys->input_pts;
983 else if( p_sys->input_dts )
985 /* Some demuxers only set the dts so let's try to find a useful
986 * timestamp from this */
987 if( !p_sys->p_context->has_b_frames || !p_sys->b_has_b_frames ||
988 !p_ff_pic->reference || !p_sys->i_pts )
990 p_ff_pic->pts = p_sys->input_dts;
1002 if( p_sys->i_pts ) /* make sure 1st frame has a pts > 0 */
1004 p_sys->input_pts = p_sys->input_dts = 0;
1008 static void ffmpeg_ReleaseFrameBuf( struct AVCodecContext *p_context,
1011 decoder_t *p_dec = (decoder_t *)p_context->opaque;
1013 if( !p_ff_pic->opaque )
1015 avcodec_default_release_buffer( p_context, p_ff_pic );
1019 picture_t *p_pic = (picture_t*)p_ff_pic->opaque;
1020 decoder_UnlinkPicture( p_dec, p_pic );
1022 p_ff_pic->data[0] = NULL;
1023 p_ff_pic->data[1] = NULL;
1024 p_ff_pic->data[2] = NULL;
1025 p_ff_pic->data[3] = NULL;
1028 static void ffmpeg_NextPts( decoder_t *p_dec )
1030 decoder_sys_t *p_sys = p_dec->p_sys;
1032 if( p_sys->i_pts <= 0 )
1035 /* interpolate the next PTS */
1036 if( p_dec->fmt_in.video.i_frame_rate > 0 &&
1037 p_dec->fmt_in.video.i_frame_rate_base > 0 )
1039 p_sys->i_pts += INT64_C(1000000) *
1040 (2 + p_sys->p_ff_pic->repeat_pict) *
1041 p_dec->fmt_in.video.i_frame_rate_base /
1042 (2 * p_dec->fmt_in.video.i_frame_rate);
1044 else if( p_sys->p_context->time_base.den > 0 )
1046 p_sys->i_pts += INT64_C(1000000) *
1047 (2 + p_sys->p_ff_pic->repeat_pict) *
1048 p_sys->p_context->time_base.num /
1049 (2 * p_sys->p_context->time_base.den);