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 */
36 #include <vlc_avcodec.h>
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 */
63 /* for frame skipping algo */
65 enum AVDiscard i_skip_frame;
66 enum AVDiscard i_skip_idct;
68 /* how many decoded frames are late */
70 mtime_t i_late_frames_start;
72 /* for direct rendering */
73 bool b_direct_rendering;
77 /* Hack to force display of still pictures */
80 int i_buffer_orig, i_buffer;
81 char *p_buffer_orig, *p_buffer;
84 AVPaletteControl palette;
90 /* FIXME (dummy palette for now) */
91 static const AVPaletteControl palette_control;
93 /*****************************************************************************
95 *****************************************************************************/
96 static void ffmpeg_InitCodec ( decoder_t * );
97 static int ffmpeg_OpenCodec ( 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_in.video.i_frame_rate > 0 &&
156 p_dec->fmt_in.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 = decoder_NewPicture( 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 = calloc( 1, sizeof(decoder_sys_t) ) ) == NULL )
190 p_sys->p_context = p_context;
191 p_sys->p_codec = p_codec;
192 p_sys->i_codec_id = i_codec_id;
193 p_sys->psz_namecodec = psz_namecodec;
194 p_sys->p_ff_pic = avcodec_alloc_frame();
195 p_sys->b_delayed_open = true;
197 /* ***** Fill p_context with init values ***** */
198 p_sys->p_context->codec_tag = ffmpeg_CodecTag( p_dec->fmt_in.i_codec );
200 /* ***** Get configuration of ffmpeg plugin ***** */
201 p_sys->p_context->workaround_bugs =
202 config_GetInt( p_dec, "ffmpeg-workaround-bugs" );
203 #if LIBAVCODEC_VERSION_INT < ((52<<16)+(0<<8)+0)
204 p_sys->p_context->error_resilience =
205 config_GetInt( p_dec, "ffmpeg-error-resilience" );
207 p_sys->p_context->error_recognition =
208 config_GetInt( p_dec, "ffmpeg-error-resilience" );
211 var_Create( p_dec, "grayscale", VLC_VAR_BOOL | VLC_VAR_DOINHERIT );
212 var_Get( p_dec, "grayscale", &val );
213 if( val.b_bool ) p_sys->p_context->flags |= CODEC_FLAG_GRAY;
215 var_Create( p_dec, "ffmpeg-vismv", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT );
216 var_Get( p_dec, "ffmpeg-vismv", &val );
217 if( val.i_int ) p_sys->p_context->debug_mv = val.i_int;
219 var_Create( p_dec, "ffmpeg-lowres", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT );
220 var_Get( p_dec, "ffmpeg-lowres", &val );
221 if( val.i_int > 0 && val.i_int <= 2 ) p_sys->p_context->lowres = val.i_int;
223 var_Create( p_dec, "ffmpeg-skiploopfilter",
224 VLC_VAR_INTEGER | VLC_VAR_DOINHERIT );
225 var_Get( p_dec, "ffmpeg-skiploopfilter", &val );
226 if( val.i_int > 0 ) p_sys->p_context->skip_loop_filter = AVDISCARD_NONREF;
227 if( val.i_int > 1 ) p_sys->p_context->skip_loop_filter = AVDISCARD_BIDIR;
228 if( val.i_int > 2 ) p_sys->p_context->skip_loop_filter = AVDISCARD_NONKEY;
229 if( val.i_int > 3 ) p_sys->p_context->skip_loop_filter = AVDISCARD_ALL;
231 /* ***** ffmpeg frame skipping ***** */
232 var_Create( p_dec, "ffmpeg-hurry-up", VLC_VAR_BOOL | VLC_VAR_DOINHERIT );
233 var_Get( p_dec, "ffmpeg-hurry-up", &val );
234 p_sys->b_hurry_up = val.b_bool;
236 var_Create( p_dec, "ffmpeg-skip-frame", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT );
237 var_Get( p_dec, "ffmpeg-skip-frame", &val );
241 p_sys->p_context->skip_frame = AVDISCARD_NONE;
244 p_sys->p_context->skip_frame = AVDISCARD_DEFAULT;
247 p_sys->p_context->skip_frame = AVDISCARD_BIDIR;
250 p_sys->p_context->skip_frame = AVDISCARD_NONKEY;
253 p_sys->p_context->skip_frame = AVDISCARD_ALL;
256 p_sys->p_context->skip_frame = AVDISCARD_NONE;
259 p_sys->i_skip_frame = p_sys->p_context->skip_frame;
261 var_Create( p_dec, "ffmpeg-skip-idct", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT );
262 var_Get( p_dec, "ffmpeg-skip-idct", &val );
266 p_sys->p_context->skip_idct = AVDISCARD_NONE;
269 p_sys->p_context->skip_idct = AVDISCARD_DEFAULT;
272 p_sys->p_context->skip_idct = AVDISCARD_BIDIR;
275 p_sys->p_context->skip_idct = AVDISCARD_NONKEY;
278 p_sys->p_context->skip_idct = AVDISCARD_ALL;
281 p_sys->p_context->skip_idct = AVDISCARD_NONE;
284 p_sys->i_skip_idct = p_sys->p_context->skip_idct;
286 /* ***** ffmpeg direct rendering ***** */
287 p_sys->b_direct_rendering = false;
288 var_Create( p_dec, "ffmpeg-dr", VLC_VAR_BOOL | VLC_VAR_DOINHERIT );
289 var_Get( p_dec, "ffmpeg-dr", &val );
290 if( val.b_bool && (p_sys->p_codec->capabilities & CODEC_CAP_DR1) &&
291 /* Apparently direct rendering doesn't work with YUV422P */
292 p_sys->p_context->pix_fmt != PIX_FMT_YUV422P &&
293 /* H264 uses too many reference frames */
294 p_sys->i_codec_id != CODEC_ID_H264 &&
295 /* No idea why ... but this fixes flickering on some TSCC streams */
296 p_sys->i_codec_id != CODEC_ID_TSCC &&
297 !p_sys->p_context->debug_mv )
299 /* Some codecs set pix_fmt only after the 1st frame has been decoded,
300 * so we need to do another check in ffmpeg_GetFrameBuf() */
301 p_sys->b_direct_rendering = true;
304 /* ffmpeg doesn't properly release old pictures when frames are skipped */
305 //if( p_sys->b_hurry_up ) p_sys->b_direct_rendering = false;
306 if( p_sys->b_direct_rendering )
308 msg_Dbg( p_dec, "using direct rendering" );
309 p_sys->p_context->flags |= CODEC_FLAG_EMU_EDGE;
312 /* Always use our get_buffer wrapper so we can calculate the
314 p_sys->p_context->get_buffer = ffmpeg_GetFrameBuf;
315 p_sys->p_context->reget_buffer = ffmpeg_ReGetFrameBuf;
316 p_sys->p_context->release_buffer = ffmpeg_ReleaseFrameBuf;
317 p_sys->p_context->opaque = p_dec;
319 /* ***** misc init ***** */
320 p_sys->input_pts = p_sys->input_dts = 0;
322 p_sys->b_has_b_frames = false;
323 p_sys->b_first_frame = true;
324 p_sys->b_flush = false;
325 p_sys->i_late_frames = 0;
327 p_sys->i_buffer_orig = 1;
328 p_sys->p_buffer_orig = p_sys->p_buffer = malloc( p_sys->i_buffer_orig );
329 if( !p_sys->p_buffer_orig )
335 /* Set output properties */
336 p_dec->fmt_out.i_cat = VIDEO_ES;
337 if( GetVlcChroma( &p_dec->fmt_out.video, p_context->pix_fmt ) != VLC_SUCCESS )
339 /* we are doomed. but not really, because most codecs set their pix_fmt later on */
340 p_dec->fmt_out.i_codec = VLC_FOURCC('I','4','2','0');
342 p_dec->fmt_out.i_codec = p_dec->fmt_out.video.i_chroma;
345 memset( &p_sys->palette, 0, sizeof(p_sys->palette) );
346 if( p_dec->fmt_in.video.p_palette )
348 p_sys->palette.palette_changed = 1;
350 for( int i = 0; i < __MIN( AVPALETTE_COUNT, p_dec->fmt_in.video.p_palette->i_entries ); i++ )
356 c.a[0] = p_dec->fmt_in.video.p_palette->palette[i][0];
357 c.a[1] = p_dec->fmt_in.video.p_palette->palette[i][1];
358 c.a[2] = p_dec->fmt_in.video.p_palette->palette[i][2];
359 c.a[3] = p_dec->fmt_in.video.p_palette->palette[i][3];
361 p_sys->palette.palette[i] = c.u;
363 p_sys->p_context->palctrl = &p_sys->palette;
365 p_dec->fmt_out.video.p_palette = malloc( sizeof(video_palette_t) );
366 if( p_dec->fmt_out.video.p_palette )
367 *p_dec->fmt_out.video.p_palette = *p_dec->fmt_in.video.p_palette;
369 else if( p_sys->i_codec_id != CODEC_ID_MSVIDEO1 && p_sys->i_codec_id != CODEC_ID_CINEPAK )
371 p_sys->p_context->palctrl = &p_sys->palette;
374 /* ***** init this codec with special data ***** */
375 ffmpeg_InitCodec( p_dec );
377 /* ***** Open the codec ***** */
378 if( ffmpeg_OpenCodec( p_dec ) < 0 )
380 msg_Err( p_dec, "cannot open codec (%s)", p_sys->psz_namecodec );
381 free( p_sys->p_buffer_orig );
389 /*****************************************************************************
390 * DecodeVideo: Called to decode one or more frames
391 *****************************************************************************/
392 picture_t *DecodeVideo( decoder_t *p_dec, block_t **pp_block )
394 decoder_sys_t *p_sys = p_dec->p_sys;
396 int b_null_size = false;
399 if( !pp_block || !*pp_block )
402 if( !p_sys->p_context->extradata_size && p_dec->fmt_in.i_extra )
404 ffmpeg_InitCodec( p_dec );
405 if( p_sys->b_delayed_open )
407 if( ffmpeg_OpenCodec( p_dec ) )
408 msg_Err( p_dec, "cannot open codec (%s)", p_sys->psz_namecodec );
413 if( p_sys->b_delayed_open )
415 block_Release( p_block );
419 if( p_block->i_flags & (BLOCK_FLAG_DISCONTINUITY|BLOCK_FLAG_CORRUPTED) )
422 p_sys->i_pts = 0; /* To make sure we recover properly */
424 p_sys->input_pts = p_sys->input_dts = 0;
425 p_sys->i_late_frames = 0;
427 block_Release( p_block );
429 //if( p_block->i_flags & BLOCK_FLAG_CORRUPTED )
430 //avcodec_flush_buffers( p_sys->p_context );
434 if( p_block->i_flags & BLOCK_FLAG_PREROLL )
436 /* Do not care about late frames when prerolling
437 * TODO avoid decoding of non reference frame
438 * (ie all B except for H264 where it depends only on nal_ref_idc) */
439 p_sys->i_late_frames = 0;
442 if( !p_dec->b_pace_control && (p_sys->i_late_frames > 0) &&
443 (mdate() - p_sys->i_late_frames_start > INT64_C(5000000)) )
447 msg_Err( p_dec, "more than 5 seconds of late video -> "
448 "dropping frame (computer too slow ?)" );
449 p_sys->i_pts = 0; /* To make sure we recover properly */
451 block_Release( p_block );
452 p_sys->i_late_frames--;
456 if( p_block->i_pts > 0 || p_block->i_dts > 0 )
458 p_sys->input_pts = p_block->i_pts;
459 p_sys->input_dts = p_block->i_dts;
461 /* Make sure we don't reuse the same timestamps twice */
462 p_block->i_pts = p_block->i_dts = 0;
465 /* A good idea could be to decode all I pictures and see for the other */
466 if( !p_dec->b_pace_control &&
468 (p_sys->i_late_frames > 4) )
471 if( p_sys->i_late_frames < 12 )
473 p_sys->p_context->skip_frame =
474 (p_sys->i_skip_frame <= AVDISCARD_BIDIR) ?
475 AVDISCARD_BIDIR : p_sys->i_skip_frame;
479 /* picture too late, won't decode
480 * but break picture until a new I, and for mpeg4 ...*/
481 p_sys->i_late_frames--; /* needed else it will never be decrease */
482 block_Release( p_block );
489 if( p_sys->b_hurry_up )
490 p_sys->p_context->skip_frame = p_sys->i_skip_frame;
491 if( !(p_block->i_flags & BLOCK_FLAG_PREROLL) )
497 if( p_sys->p_context->width <= 0 || p_sys->p_context->height <= 0 )
499 if( p_sys->b_hurry_up )
500 p_sys->p_context->skip_frame = p_sys->i_skip_frame;
503 else if( !b_drawpicture )
505 /* It creates broken picture
506 * FIXME either our parser or ffmpeg is broken */
508 if( p_sys->b_hurry_up )
509 p_sys->p_context->skip_frame = __MAX( p_sys->p_context->skip_frame,
515 * Do the actual decoding now
518 /* Don't forget that ffmpeg requires a little more bytes
519 * that the real frame size */
520 if( p_block->i_buffer > 0 )
522 p_sys->b_flush = ( p_block->i_flags & BLOCK_FLAG_END_OF_SEQUENCE ) != 0;
524 p_sys->i_buffer = p_block->i_buffer;
525 if( p_sys->i_buffer + FF_INPUT_BUFFER_PADDING_SIZE >
526 p_sys->i_buffer_orig )
528 free( p_sys->p_buffer_orig );
529 p_sys->i_buffer_orig =
530 p_block->i_buffer + FF_INPUT_BUFFER_PADDING_SIZE;
531 p_sys->p_buffer_orig = malloc( p_sys->i_buffer_orig );
533 p_sys->p_buffer = p_sys->p_buffer_orig;
534 p_sys->i_buffer = p_block->i_buffer;
535 if( !p_sys->p_buffer )
537 block_Release( p_block );
540 vlc_memcpy( p_sys->p_buffer, p_block->p_buffer, p_block->i_buffer );
541 memset( p_sys->p_buffer + p_block->i_buffer, 0,
542 FF_INPUT_BUFFER_PADDING_SIZE );
544 p_block->i_buffer = 0;
547 while( p_sys->i_buffer > 0 || p_sys->b_flush )
549 int i_used, b_gotpicture;
552 i_used = avcodec_decode_video( p_sys->p_context, p_sys->p_ff_pic,
554 p_sys->i_buffer <= 0 && p_sys->b_flush ? NULL : (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 &&
560 /* Reparse it to not drop the I frame */
562 if( p_sys->b_hurry_up )
563 p_sys->p_context->skip_frame = p_sys->i_skip_frame;
564 i_used = avcodec_decode_video( p_sys->p_context, p_sys->p_ff_pic,
566 (uint8_t*)p_sys->p_buffer, p_sys->i_buffer );
570 p_sys->b_first_frame = true;
572 if( p_sys->i_buffer <= 0 )
573 p_sys->b_flush = false;
578 msg_Warn( p_dec, "cannot decode one frame (%d bytes)",
580 block_Release( p_block );
583 else if( i_used > p_sys->i_buffer )
585 i_used = p_sys->i_buffer;
589 p_sys->i_buffer -= i_used;
590 p_sys->p_buffer += i_used;
592 /* Nothing to display */
595 if( i_used == 0 ) break;
600 if( p_sys->p_ff_pic->pts )
601 p_sys->i_pts = p_sys->p_ff_pic->pts;
603 /* Update frame late count (except when doing preroll) */
604 mtime_t i_display_date = 0;
605 if( !(p_block->i_flags & BLOCK_FLAG_PREROLL) )
606 i_display_date = decoder_GetDisplayDate( p_dec, p_sys->i_pts );
608 if( i_display_date > 0 && i_display_date <= mdate() )
610 p_sys->i_late_frames++;
611 if( p_sys->i_late_frames == 1 )
612 p_sys->i_late_frames_start = mdate();
616 p_sys->i_late_frames = 0;
619 if( !b_drawpicture || !p_sys->p_ff_pic->linesize[0] )
621 /* Do not display the picture */
622 p_pic = (picture_t *)p_sys->p_ff_pic->opaque;
623 if( !b_drawpicture && p_pic )
624 decoder_DeletePicture( p_dec, p_pic );
626 ffmpeg_NextPts( p_dec );
630 if( !p_sys->p_ff_pic->opaque )
632 /* Get a new picture */
633 p_pic = ffmpeg_NewPictBuf( p_dec, p_sys->p_context );
636 block_Release( p_block );
640 /* Fill p_picture_t from AVVideoFrame and do chroma conversion
642 ffmpeg_CopyPicture( p_dec, p_pic, p_sys->p_ff_pic );
646 p_pic = (picture_t *)p_sys->p_ff_pic->opaque;
649 /* Sanity check (seems to be needed for some streams) */
650 if( p_sys->p_ff_pic->pict_type == FF_B_TYPE )
652 p_sys->b_has_b_frames = true;
655 if( !p_dec->fmt_in.video.i_aspect )
657 /* Fetch again the aspect ratio in case it changed */
658 p_dec->fmt_out.video.i_aspect =
660 * ( av_q2d(p_sys->p_context->sample_aspect_ratio)
661 * p_sys->p_context->width / p_sys->p_context->height );
662 p_dec->fmt_out.video.i_sar_num
663 = p_sys->p_context->sample_aspect_ratio.num;
664 p_dec->fmt_out.video.i_sar_den
665 = p_sys->p_context->sample_aspect_ratio.den;
667 if( p_dec->fmt_out.video.i_aspect == 0 )
669 p_dec->fmt_out.video.i_aspect = VOUT_ASPECT_FACTOR
670 * p_sys->p_context->width / p_sys->p_context->height;
674 /* Send decoded frame to vout */
677 p_pic->date = p_sys->i_pts;
679 ffmpeg_NextPts( p_dec );
681 if( p_sys->b_first_frame )
683 /* Hack to force display of still pictures */
684 p_sys->b_first_frame = false;
685 p_pic->b_force = true;
688 p_pic->i_nb_fields = 2 + p_sys->p_ff_pic->repeat_pict;
689 p_pic->b_progressive = !p_sys->p_ff_pic->interlaced_frame;
690 p_pic->b_top_field_first = p_sys->p_ff_pic->top_field_first;
692 p_pic->i_qstride = p_sys->p_ff_pic->qstride;
693 int i_mb_h = ( p_pic->format.i_height + 15 ) / 16;
694 p_pic->p_q = malloc( p_pic->i_qstride * i_mb_h );
695 memcpy( p_pic->p_q, p_sys->p_ff_pic->qscale_table,
696 p_pic->i_qstride * i_mb_h );
697 switch( p_sys->p_ff_pic->qscale_type )
699 case FF_QSCALE_TYPE_MPEG1:
700 p_pic->i_qtype = QTYPE_MPEG1;
702 case FF_QSCALE_TYPE_MPEG2:
703 p_pic->i_qtype = QTYPE_MPEG2;
705 case FF_QSCALE_TYPE_H264:
706 p_pic->i_qtype = QTYPE_H264;
714 decoder_DeletePicture( p_dec, p_pic );
718 block_Release( p_block );
722 /*****************************************************************************
723 * EndVideo: decoder destruction
724 *****************************************************************************
725 * This function is called when the thread ends after a successful
727 *****************************************************************************/
728 void EndVideoDec( decoder_t *p_dec )
730 decoder_sys_t *p_sys = p_dec->p_sys;
732 if( p_sys->p_ff_pic ) av_free( p_sys->p_ff_pic );
733 free( p_sys->p_buffer_orig );
736 /*****************************************************************************
737 * ffmpeg_InitCodec: setup codec extra initialization data for ffmpeg
738 *****************************************************************************/
739 static void ffmpeg_InitCodec( decoder_t *p_dec )
741 decoder_sys_t *p_sys = p_dec->p_sys;
742 int i_size = p_dec->fmt_in.i_extra;
744 if( !i_size ) return;
746 if( p_sys->i_codec_id == CODEC_ID_SVQ3 )
750 p_sys->p_context->extradata_size = i_size + 12;
751 p = p_sys->p_context->extradata =
752 malloc( p_sys->p_context->extradata_size );
756 memcpy( &p[0], "SVQ3", 4 );
757 memset( &p[4], 0, 8 );
758 memcpy( &p[12], p_dec->fmt_in.p_extra, i_size );
760 /* Now remove all atoms before the SMI one */
761 if( p_sys->p_context->extradata_size > 0x5a &&
762 strncmp( (char*)&p[0x56], "SMI ", 4 ) )
764 uint8_t *psz = &p[0x52];
766 while( psz < &p[p_sys->p_context->extradata_size - 8] )
768 int i_size = GetDWBE( psz );
771 /* FIXME handle 1 as long size */
774 if( !strncmp( (char*)&psz[4], "SMI ", 4 ) )
776 memmove( &p[0x52], psz,
777 &p[p_sys->p_context->extradata_size] - psz );
787 p_sys->p_context->extradata_size = i_size;
788 p_sys->p_context->extradata =
789 malloc( i_size + FF_INPUT_BUFFER_PADDING_SIZE );
790 if( p_sys->p_context->extradata )
792 memcpy( p_sys->p_context->extradata,
793 p_dec->fmt_in.p_extra, i_size );
794 memset( &((uint8_t*)p_sys->p_context->extradata)[i_size],
795 0, FF_INPUT_BUFFER_PADDING_SIZE );
800 /*****************************************************************************
802 *****************************************************************************/
803 static int ffmpeg_OpenCodec( decoder_t *p_dec )
805 decoder_sys_t *p_sys = p_dec->p_sys;
807 if( p_sys->p_context->extradata_size <= 0 )
809 if( p_sys->i_codec_id == CODEC_ID_VC1 ||
810 p_sys->i_codec_id == CODEC_ID_VORBIS ||
811 p_sys->i_codec_id == CODEC_ID_THEORA )
813 msg_Warn( p_dec, "waiting for extra data for codec %s",
814 p_sys->psz_namecodec );
818 p_sys->p_context->width = p_dec->fmt_in.video.i_width;
819 p_sys->p_context->height = p_dec->fmt_in.video.i_height;
820 #if LIBAVCODEC_VERSION_INT < ((52<<16)+(0<<8)+0)
821 p_sys->p_context->bits_per_sample = p_dec->fmt_in.video.i_bits_per_pixel;
823 p_sys->p_context->bits_per_coded_sample = p_dec->fmt_in.video.i_bits_per_pixel;
828 ret = avcodec_open( p_sys->p_context, p_sys->p_codec );
829 vlc_avcodec_unlock();
832 msg_Dbg( p_dec, "ffmpeg codec (%s) started", p_sys->psz_namecodec );
834 p_sys->b_delayed_open = false;
838 /*****************************************************************************
839 * ffmpeg_CopyPicture: copy a picture from ffmpeg internal buffers to a
840 * picture_t structure (when not in direct rendering mode).
841 *****************************************************************************/
842 static void ffmpeg_CopyPicture( decoder_t *p_dec,
843 picture_t *p_pic, AVFrame *p_ff_pic )
845 decoder_sys_t *p_sys = p_dec->p_sys;
847 if( TestFfmpegChroma( p_sys->p_context->pix_fmt, -1 ) == VLC_SUCCESS )
849 int i_plane, i_size, i_line;
850 uint8_t *p_dst, *p_src;
851 int i_src_stride, i_dst_stride;
853 for( i_plane = 0; i_plane < p_pic->i_planes; i_plane++ )
855 p_src = p_ff_pic->data[i_plane];
856 p_dst = p_pic->p[i_plane].p_pixels;
857 i_src_stride = p_ff_pic->linesize[i_plane];
858 i_dst_stride = p_pic->p[i_plane].i_pitch;
860 i_size = __MIN( i_src_stride, i_dst_stride );
861 for( i_line = 0; i_line < p_pic->p[i_plane].i_visible_lines;
864 vlc_memcpy( p_dst, p_src, i_size );
865 p_src += i_src_stride;
866 p_dst += i_dst_stride;
872 msg_Err( p_dec, "don't know how to convert chroma %i",
873 p_sys->p_context->pix_fmt );
878 /*****************************************************************************
879 * ffmpeg_GetFrameBuf: callback used by ffmpeg to get a frame buffer.
880 *****************************************************************************
881 * It is used for direct rendering as well as to get the right PTS for each
882 * decoded picture (even in indirect rendering mode).
883 *****************************************************************************/
884 static void ffmpeg_SetFrameBufferPts( decoder_t *p_dec, AVFrame *p_ff_pic );
886 static int ffmpeg_GetFrameBuf( struct AVCodecContext *p_context,
889 decoder_t *p_dec = (decoder_t *)p_context->opaque;
890 decoder_sys_t *p_sys = p_dec->p_sys;
893 /* Set picture PTS */
894 ffmpeg_SetFrameBufferPts( p_dec, p_ff_pic );
897 p_ff_pic->opaque = 0;
899 /* Not much to do in indirect rendering mode */
900 if( !p_sys->b_direct_rendering )
902 return avcodec_default_get_buffer( p_context, p_ff_pic );
905 /* Some codecs set pix_fmt only after the 1st frame has been decoded,
906 * so we need to check for direct rendering again. */
908 int i_width = p_sys->p_context->width;
909 int i_height = p_sys->p_context->height;
910 avcodec_align_dimensions( p_sys->p_context, &i_width, &i_height );
912 if( GetVlcChroma( &p_dec->fmt_out.video, p_context->pix_fmt ) != VLC_SUCCESS ||
913 p_sys->p_context->width % 16 || p_sys->p_context->height % 16 ||
914 /* We only pad picture up to 16 */
915 PAD(p_sys->p_context->width,16) < i_width || PAD(p_sys->p_context->height,16) < i_height ||
916 p_context->pix_fmt == PIX_FMT_PAL8 )
918 msg_Dbg( p_dec, "disabling direct rendering" );
919 p_sys->b_direct_rendering = false;
920 return avcodec_default_get_buffer( p_context, p_ff_pic );
922 p_dec->fmt_out.i_codec = p_dec->fmt_out.video.i_chroma;
924 /* Get a new picture */
925 //p_sys->p_vout->render.b_allow_modify_pics = 0;
926 p_pic = ffmpeg_NewPictBuf( p_dec, p_sys->p_context );
929 p_sys->b_direct_rendering = false;
930 return avcodec_default_get_buffer( p_context, p_ff_pic );
932 p_sys->p_context->draw_horiz_band = NULL;
934 p_ff_pic->opaque = (void*)p_pic;
935 p_ff_pic->type = FF_BUFFER_TYPE_USER;
936 p_ff_pic->data[0] = p_pic->p[0].p_pixels;
937 p_ff_pic->data[1] = p_pic->p[1].p_pixels;
938 p_ff_pic->data[2] = p_pic->p[2].p_pixels;
939 p_ff_pic->data[3] = NULL; /* alpha channel but I'm not sure */
941 p_ff_pic->linesize[0] = p_pic->p[0].i_pitch;
942 p_ff_pic->linesize[1] = p_pic->p[1].i_pitch;
943 p_ff_pic->linesize[2] = p_pic->p[2].i_pitch;
944 p_ff_pic->linesize[3] = 0;
946 if( p_ff_pic->reference != 0 )
948 decoder_LinkPicture( p_dec, p_pic );
951 /* FIXME what is that, should give good value */
952 p_ff_pic->age = 256*256*256*64; // FIXME FIXME from ffmpeg
956 static int ffmpeg_ReGetFrameBuf( struct AVCodecContext *p_context, AVFrame *p_ff_pic )
958 decoder_t *p_dec = (decoder_t *)p_context->opaque;
962 p_ff_pic->pts = AV_NOPTS_VALUE;
964 /* We always use default reget function, it works perfectly fine */
965 i_ret = avcodec_default_reget_buffer( p_context, p_ff_pic );
967 /* Set picture PTS if avcodec_default_reget_buffer didn't set it (through a
968 * ffmpeg_GetFrameBuf call) */
969 if( !i_ret && p_ff_pic->pts == AV_NOPTS_VALUE )
970 ffmpeg_SetFrameBufferPts( p_dec, p_ff_pic );
975 static void ffmpeg_SetFrameBufferPts( decoder_t *p_dec, AVFrame *p_ff_pic )
977 decoder_sys_t *p_sys = p_dec->p_sys;
979 /* Set picture PTS */
980 if( p_sys->input_pts )
982 p_ff_pic->pts = p_sys->input_pts;
984 else if( p_sys->input_dts )
986 /* Some demuxers only set the dts so let's try to find a useful
987 * timestamp from this */
988 if( !p_sys->p_context->has_b_frames || !p_sys->b_has_b_frames ||
989 !p_ff_pic->reference || !p_sys->i_pts )
991 p_ff_pic->pts = p_sys->input_dts;
1003 if( p_sys->i_pts ) /* make sure 1st frame has a pts > 0 */
1005 p_sys->input_pts = p_sys->input_dts = 0;
1009 static void ffmpeg_ReleaseFrameBuf( struct AVCodecContext *p_context,
1012 decoder_t *p_dec = (decoder_t *)p_context->opaque;
1015 if( !p_ff_pic->opaque )
1017 avcodec_default_release_buffer( p_context, p_ff_pic );
1021 p_pic = (picture_t*)p_ff_pic->opaque;
1023 p_ff_pic->data[0] = NULL;
1024 p_ff_pic->data[1] = NULL;
1025 p_ff_pic->data[2] = NULL;
1026 p_ff_pic->data[3] = NULL;
1028 if( p_ff_pic->reference != 0 )
1030 decoder_UnlinkPicture( p_dec, p_pic );
1034 static void ffmpeg_NextPts( decoder_t *p_dec )
1036 decoder_sys_t *p_sys = p_dec->p_sys;
1038 if( p_sys->i_pts <= 0 )
1041 /* interpolate the next PTS */
1042 if( p_dec->fmt_in.video.i_frame_rate > 0 &&
1043 p_dec->fmt_in.video.i_frame_rate_base > 0 )
1045 p_sys->i_pts += INT64_C(1000000) *
1046 (2 + p_sys->p_ff_pic->repeat_pict) *
1047 p_dec->fmt_in.video.i_frame_rate_base /
1048 (2 * p_dec->fmt_in.video.i_frame_rate);
1050 else if( p_sys->p_context->time_base.den > 0 )
1052 p_sys->i_pts += INT64_C(1000000) *
1053 (2 + p_sys->p_ff_pic->repeat_pict) *
1054 p_sys->p_context->time_base.num /
1055 (2 * p_sys->p_context->time_base.den);