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>
48 /*****************************************************************************
49 * decoder_sys_t : decoder descriptor
50 *****************************************************************************/
55 /* Video decoder specific part */
61 BITMAPINFOHEADER *p_format;
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 int 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 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_FOURCC('I','4','2','0');
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_out.video.i_frame_rate > 0 &&
155 p_dec->fmt_out.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 =
187 (decoder_sys_t *)malloc(sizeof(decoder_sys_t)) ) == NULL )
191 memset( p_sys, 0, sizeof(decoder_sys_t) );
193 p_dec->p_sys->p_context = p_context;
194 p_dec->p_sys->p_codec = p_codec;
195 p_dec->p_sys->i_codec_id = i_codec_id;
196 p_dec->p_sys->psz_namecodec = psz_namecodec;
197 p_sys->p_ff_pic = avcodec_alloc_frame();
199 /* ***** Fill p_context with init values ***** */
200 p_sys->p_context->codec_tag = ffmpeg_CodecTag( p_dec->fmt_in.i_codec );
201 p_sys->p_context->width = p_dec->fmt_in.video.i_width;
202 p_sys->p_context->height = p_dec->fmt_in.video.i_height;
203 #if LIBAVCODEC_VERSION_INT < ((52<<16)+(0<<8)+0)
204 p_sys->p_context->bits_per_sample = p_dec->fmt_in.video.i_bits_per_pixel;
206 p_sys->p_context->bits_per_coded_sample = p_dec->fmt_in.video.i_bits_per_pixel;
209 /* ***** Get configuration of ffmpeg plugin ***** */
210 p_sys->p_context->workaround_bugs =
211 config_GetInt( p_dec, "ffmpeg-workaround-bugs" );
212 #if LIBAVCODEC_VERSION_INT < ((52<<16)+(0<<8)+0)
213 p_sys->p_context->error_resilience =
214 config_GetInt( p_dec, "ffmpeg-error-resilience" );
216 p_sys->p_context->error_recognition =
217 config_GetInt( p_dec, "ffmpeg-error-resilience" );
220 var_Create( p_dec, "grayscale", VLC_VAR_BOOL | VLC_VAR_DOINHERIT );
221 var_Get( p_dec, "grayscale", &val );
222 if( val.b_bool ) p_sys->p_context->flags |= CODEC_FLAG_GRAY;
224 var_Create( p_dec, "ffmpeg-vismv", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT );
225 var_Get( p_dec, "ffmpeg-vismv", &val );
226 if( val.i_int ) p_sys->p_context->debug_mv = val.i_int;
228 var_Create( p_dec, "ffmpeg-lowres", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT );
229 var_Get( p_dec, "ffmpeg-lowres", &val );
230 if( val.i_int > 0 && val.i_int <= 2 ) p_sys->p_context->lowres = val.i_int;
232 var_Create( p_dec, "ffmpeg-skiploopfilter",
233 VLC_VAR_INTEGER | VLC_VAR_DOINHERIT );
234 var_Get( p_dec, "ffmpeg-skiploopfilter", &val );
235 if( val.i_int > 0 ) p_sys->p_context->skip_loop_filter = AVDISCARD_NONREF;
236 if( val.i_int > 1 ) p_sys->p_context->skip_loop_filter = AVDISCARD_BIDIR;
237 if( val.i_int > 2 ) p_sys->p_context->skip_loop_filter = AVDISCARD_NONKEY;
238 if( val.i_int > 3 ) p_sys->p_context->skip_loop_filter = AVDISCARD_ALL;
240 /* ***** ffmpeg frame skipping ***** */
241 var_Create( p_dec, "ffmpeg-hurry-up", VLC_VAR_BOOL | VLC_VAR_DOINHERIT );
242 var_Get( p_dec, "ffmpeg-hurry-up", &val );
243 p_sys->b_hurry_up = val.b_bool;
245 var_Create( p_dec, "ffmpeg-skip-frame", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT );
246 var_Get( p_dec, "ffmpeg-skip-frame", &val );
250 p_sys->p_context->skip_frame = AVDISCARD_NONE;
253 p_sys->p_context->skip_frame = AVDISCARD_DEFAULT;
256 p_sys->p_context->skip_frame = AVDISCARD_BIDIR;
259 p_sys->p_context->skip_frame = AVDISCARD_NONKEY;
262 p_sys->p_context->skip_frame = AVDISCARD_ALL;
265 p_sys->p_context->skip_frame = AVDISCARD_NONE;
268 p_sys->i_skip_frame = p_sys->p_context->skip_frame;
270 var_Create( p_dec, "ffmpeg-skip-idct", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT );
271 var_Get( p_dec, "ffmpeg-skip-idct", &val );
275 p_sys->p_context->skip_idct = AVDISCARD_NONE;
278 p_sys->p_context->skip_idct = AVDISCARD_DEFAULT;
281 p_sys->p_context->skip_idct = AVDISCARD_BIDIR;
284 p_sys->p_context->skip_idct = AVDISCARD_NONKEY;
287 p_sys->p_context->skip_idct = AVDISCARD_ALL;
290 p_sys->p_context->skip_idct = AVDISCARD_NONE;
293 p_sys->i_skip_idct = p_sys->p_context->skip_idct;
295 /* ***** ffmpeg direct rendering ***** */
296 p_sys->b_direct_rendering = 0;
297 var_Create( p_dec, "ffmpeg-dr", VLC_VAR_BOOL | VLC_VAR_DOINHERIT );
298 var_Get( p_dec, "ffmpeg-dr", &val );
299 if( val.b_bool && (p_sys->p_codec->capabilities & CODEC_CAP_DR1) &&
300 /* Apparently direct rendering doesn't work with YUV422P */
301 p_sys->p_context->pix_fmt != PIX_FMT_YUV422P &&
302 /* H264 uses too many reference frames */
303 p_sys->i_codec_id != CODEC_ID_H264 &&
304 !p_sys->p_context->debug_mv )
306 /* Some codecs set pix_fmt only after the 1st frame has been decoded,
307 * so we need to do another check in ffmpeg_GetFrameBuf() */
308 p_sys->b_direct_rendering = 1;
311 /* ffmpeg doesn't properly release old pictures when frames are skipped */
312 //if( p_sys->b_hurry_up ) p_sys->b_direct_rendering = 0;
313 if( p_sys->b_direct_rendering )
315 msg_Dbg( p_dec, "using direct rendering" );
316 p_sys->p_context->flags |= CODEC_FLAG_EMU_EDGE;
319 /* Always use our get_buffer wrapper so we can calculate the
321 p_sys->p_context->get_buffer = ffmpeg_GetFrameBuf;
322 p_sys->p_context->reget_buffer = ffmpeg_ReGetFrameBuf;
323 p_sys->p_context->release_buffer = ffmpeg_ReleaseFrameBuf;
324 p_sys->p_context->opaque = p_dec;
326 /* ***** init this codec with special data ***** */
327 ffmpeg_InitCodec( p_dec );
329 /* ***** misc init ***** */
330 p_sys->input_pts = p_sys->input_dts = 0;
332 p_sys->b_has_b_frames = false;
333 p_sys->b_first_frame = true;
334 p_sys->b_flush = false;
335 p_sys->i_late_frames = 0;
337 p_sys->i_buffer_orig = 1;
338 p_sys->p_buffer_orig = p_sys->p_buffer = malloc( p_sys->i_buffer_orig );
339 if( !p_sys->p_buffer_orig )
345 /* Set output properties */
346 p_dec->fmt_out.i_cat = VIDEO_ES;
347 if( GetVlcChroma( &p_dec->fmt_out.video, p_context->pix_fmt ) != VLC_SUCCESS )
349 /* we are doomed. but not really, because most codecs set their pix_fmt later on */
350 p_dec->fmt_out.i_codec = VLC_FOURCC('I','4','2','0');
352 p_dec->fmt_out.i_codec = p_dec->fmt_out.video.i_chroma;
355 memset( &p_sys->palette, 0, sizeof(p_sys->palette) );
356 if( p_dec->fmt_in.video.p_palette )
358 p_sys->palette.palette_changed = 1;
360 for( int i = 0; i < __MIN( AVPALETTE_COUNT, p_dec->fmt_in.video.p_palette->i_entries ); i++ )
366 c.a[0] = p_dec->fmt_in.video.p_palette->palette[i][0];
367 c.a[1] = p_dec->fmt_in.video.p_palette->palette[i][1];
368 c.a[2] = p_dec->fmt_in.video.p_palette->palette[i][2];
369 c.a[3] = p_dec->fmt_in.video.p_palette->palette[i][3];
371 p_sys->palette.palette[i] = c.u;
373 p_sys->p_context->palctrl = &p_sys->palette;
375 p_dec->fmt_out.video.p_palette = malloc( sizeof(video_palette_t) );
376 if( p_dec->fmt_out.video.p_palette )
377 *p_dec->fmt_out.video.p_palette = *p_dec->fmt_in.video.p_palette;
379 else if( p_sys->i_codec_id != CODEC_ID_MSVIDEO1 && p_sys->i_codec_id != CODEC_ID_CINEPAK )
381 p_sys->p_context->palctrl = &p_sys->palette;
384 /* ***** Open the codec ***** */
385 vlc_mutex_lock( &avcodec_lock );
386 if( avcodec_open( p_sys->p_context, p_sys->p_codec ) < 0 )
388 vlc_mutex_unlock( &avcodec_lock );
389 msg_Err( p_dec, "cannot open codec (%s)", p_sys->psz_namecodec );
390 free( p_sys->p_buffer_orig );
394 vlc_mutex_unlock( &avcodec_lock );
395 msg_Dbg( p_dec, "ffmpeg codec (%s) started", p_sys->psz_namecodec );
401 /*****************************************************************************
402 * DecodeVideo: Called to decode one or more frames
403 *****************************************************************************/
404 picture_t *DecodeVideo( decoder_t *p_dec, block_t **pp_block )
406 decoder_sys_t *p_sys = p_dec->p_sys;
408 int b_null_size = false;
411 if( !pp_block || !*pp_block ) return NULL;
413 if( !p_sys->p_context->extradata_size && p_dec->fmt_in.i_extra )
414 ffmpeg_InitCodec( p_dec );
418 if( p_block->i_flags & (BLOCK_FLAG_DISCONTINUITY|BLOCK_FLAG_CORRUPTED) )
421 p_sys->i_pts = 0; /* To make sure we recover properly */
423 p_sys->input_pts = p_sys->input_dts = 0;
424 p_sys->i_late_frames = 0;
426 block_Release( p_block );
428 //if( p_block->i_flags & BLOCK_FLAG_CORRUPTED )
429 //avcodec_flush_buffers( p_sys->p_context );
433 if( p_block->i_flags & BLOCK_FLAG_PREROLL )
435 /* Do not care about late frames when prerolling
436 * TODO avoid decoding of non reference frame
437 * (ie all B except for H264 where it depends only on nal_ref_idc) */
438 p_sys->i_late_frames = 0;
441 if( !p_dec->b_pace_control && (p_sys->i_late_frames > 0) &&
442 (mdate() - p_sys->i_late_frames_start > INT64_C(5000000)) )
446 msg_Err( p_dec, "more than 5 seconds of late video -> "
447 "dropping frame (computer too slow ?)" );
448 p_sys->i_pts = 0; /* To make sure we recover properly */
450 block_Release( p_block );
451 p_sys->i_late_frames--;
455 if( p_block->i_pts > 0 || p_block->i_dts > 0 )
457 p_sys->input_pts = p_block->i_pts;
458 p_sys->input_dts = p_block->i_dts;
460 /* Make sure we don't reuse the same timestamps twice */
461 p_block->i_pts = p_block->i_dts = 0;
464 /* A good idea could be to decode all I pictures and see for the other */
465 if( !p_dec->b_pace_control &&
467 (p_sys->i_late_frames > 4) )
470 if( p_sys->i_late_frames < 12 )
472 p_sys->p_context->skip_frame =
473 (p_sys->i_skip_frame <= AVDISCARD_BIDIR) ?
474 AVDISCARD_BIDIR : p_sys->i_skip_frame;
478 /* picture too late, won't decode
479 * but break picture until a new I, and for mpeg4 ...*/
480 p_sys->i_late_frames--; /* needed else it will never be decrease */
481 block_Release( p_block );
488 if( p_sys->b_hurry_up )
489 p_sys->p_context->skip_frame = p_sys->i_skip_frame;
490 if( !(p_block->i_flags & BLOCK_FLAG_PREROLL) )
496 if( p_sys->p_context->width <= 0 || p_sys->p_context->height <= 0 )
498 if( p_sys->b_hurry_up )
499 p_sys->p_context->skip_frame = p_sys->i_skip_frame;
504 * Do the actual decoding now
507 /* Don't forget that ffmpeg requires a little more bytes
508 * that the real frame size */
509 if( p_block->i_buffer > 0 )
511 p_sys->b_flush = ( p_block->i_flags & BLOCK_FLAG_END_OF_SEQUENCE ) != 0;
513 p_sys->i_buffer = p_block->i_buffer;
514 if( p_sys->i_buffer + FF_INPUT_BUFFER_PADDING_SIZE >
515 p_sys->i_buffer_orig )
517 free( p_sys->p_buffer_orig );
518 p_sys->i_buffer_orig =
519 p_block->i_buffer + FF_INPUT_BUFFER_PADDING_SIZE;
520 p_sys->p_buffer_orig = malloc( p_sys->i_buffer_orig );
522 p_sys->p_buffer = p_sys->p_buffer_orig;
523 p_sys->i_buffer = p_block->i_buffer;
524 if( !p_sys->p_buffer )
526 block_Release( p_block );
529 vlc_memcpy( p_sys->p_buffer, p_block->p_buffer, p_block->i_buffer );
530 memset( p_sys->p_buffer + p_block->i_buffer, 0,
531 FF_INPUT_BUFFER_PADDING_SIZE );
533 p_block->i_buffer = 0;
536 while( p_sys->i_buffer > 0 || p_sys->b_flush )
538 int i_used, b_gotpicture;
541 i_used = avcodec_decode_video( p_sys->p_context, p_sys->p_ff_pic,
543 p_sys->i_buffer <= 0 && p_sys->b_flush ? NULL : (uint8_t*)p_sys->p_buffer, p_sys->i_buffer );
545 if( b_null_size && p_sys->p_context->width > 0 &&
546 p_sys->p_context->height > 0 &&
549 /* Reparse it to not drop the I frame */
551 if( p_sys->b_hurry_up )
552 p_sys->p_context->skip_frame = p_sys->i_skip_frame;
553 i_used = avcodec_decode_video( p_sys->p_context, p_sys->p_ff_pic,
555 (uint8_t*)p_sys->p_buffer, p_sys->i_buffer );
559 p_sys->b_first_frame = true;
561 if( p_sys->i_buffer <= 0 )
562 p_sys->b_flush = false;
566 msg_Warn( p_dec, "cannot decode one frame (%d bytes)",
568 block_Release( p_block );
571 else if( i_used > p_sys->i_buffer )
573 i_used = p_sys->i_buffer;
577 p_sys->i_buffer -= i_used;
578 p_sys->p_buffer += i_used;
580 /* Nothing to display */
583 if( i_used == 0 ) break;
588 if( p_sys->p_ff_pic->pts )
589 p_sys->i_pts = p_sys->p_ff_pic->pts;
591 /* Update frame late count (except when doing preroll) */
592 mtime_t i_display_date = 0;
593 if( !(p_block->i_flags & BLOCK_FLAG_PREROLL) )
594 i_display_date = decoder_GetDisplayDate( p_dec, p_sys->i_pts );
596 if( i_display_date > 0 && i_display_date <= mdate() )
598 p_sys->i_late_frames++;
599 if( p_sys->i_late_frames == 1 )
600 p_sys->i_late_frames_start = mdate();
604 p_sys->i_late_frames = 0;
607 if( !b_drawpicture || !p_sys->p_ff_pic->linesize[0] )
609 /* Do not display the picture */
610 p_pic = (picture_t *)p_sys->p_ff_pic->opaque;
611 if( !b_drawpicture && p_pic )
612 decoder_DeletePicture( p_dec, p_pic );
614 ffmpeg_NextPts( p_dec );
618 if( !p_sys->p_ff_pic->opaque )
620 /* Get a new picture */
621 p_pic = ffmpeg_NewPictBuf( p_dec, p_sys->p_context );
624 block_Release( p_block );
628 /* Fill p_picture_t from AVVideoFrame and do chroma conversion
630 ffmpeg_CopyPicture( p_dec, p_pic, p_sys->p_ff_pic );
634 p_pic = (picture_t *)p_sys->p_ff_pic->opaque;
637 /* Sanity check (seems to be needed for some streams) */
638 if( p_sys->p_ff_pic->pict_type == FF_B_TYPE )
640 p_sys->b_has_b_frames = true;
643 if( !p_dec->fmt_in.video.i_aspect )
645 /* Fetch again the aspect ratio in case it changed */
646 p_dec->fmt_out.video.i_aspect =
648 * ( av_q2d(p_sys->p_context->sample_aspect_ratio)
649 * p_sys->p_context->width / p_sys->p_context->height );
650 p_dec->fmt_out.video.i_sar_num
651 = p_sys->p_context->sample_aspect_ratio.num;
652 p_dec->fmt_out.video.i_sar_den
653 = p_sys->p_context->sample_aspect_ratio.den;
655 if( p_dec->fmt_out.video.i_aspect == 0 )
657 p_dec->fmt_out.video.i_aspect = VOUT_ASPECT_FACTOR
658 * p_sys->p_context->width / p_sys->p_context->height;
662 /* Send decoded frame to vout */
665 p_pic->date = p_sys->i_pts;
667 ffmpeg_NextPts( p_dec );
669 if( p_sys->b_first_frame )
671 /* Hack to force display of still pictures */
672 p_sys->b_first_frame = false;
673 p_pic->b_force = true;
676 p_pic->i_nb_fields = 2 + p_sys->p_ff_pic->repeat_pict;
677 p_pic->b_progressive = !p_sys->p_ff_pic->interlaced_frame;
678 p_pic->b_top_field_first = p_sys->p_ff_pic->top_field_first;
680 p_pic->i_qstride = p_sys->p_ff_pic->qstride;
681 int i_mb_h = ( p_pic->format.i_height + 15 ) / 16;
682 p_pic->p_q = malloc( p_pic->i_qstride * i_mb_h );
683 memcpy( p_pic->p_q, p_sys->p_ff_pic->qscale_table,
684 p_pic->i_qstride * i_mb_h );
685 switch( p_sys->p_ff_pic->qscale_type )
687 case FF_QSCALE_TYPE_MPEG1:
688 p_pic->i_qtype = QTYPE_MPEG1;
690 case FF_QSCALE_TYPE_MPEG2:
691 p_pic->i_qtype = QTYPE_MPEG2;
693 case FF_QSCALE_TYPE_H264:
694 p_pic->i_qtype = QTYPE_H264;
702 decoder_DeletePicture( p_dec, p_pic );
706 block_Release( p_block );
710 /*****************************************************************************
711 * EndVideo: decoder destruction
712 *****************************************************************************
713 * This function is called when the thread ends after a successful
715 *****************************************************************************/
716 void EndVideoDec( decoder_t *p_dec )
718 decoder_sys_t *p_sys = p_dec->p_sys;
720 if( p_sys->p_ff_pic ) av_free( p_sys->p_ff_pic );
721 free( p_sys->p_buffer_orig );
724 /*****************************************************************************
725 * ffmpeg_InitCodec: setup codec extra initialization data for ffmpeg
726 *****************************************************************************/
727 static void ffmpeg_InitCodec( decoder_t *p_dec )
729 decoder_sys_t *p_sys = p_dec->p_sys;
730 int i_size = p_dec->fmt_in.i_extra;
732 if( !i_size ) return;
734 if( p_sys->i_codec_id == CODEC_ID_SVQ3 )
738 p_sys->p_context->extradata_size = i_size + 12;
739 p = p_sys->p_context->extradata =
740 malloc( p_sys->p_context->extradata_size );
744 memcpy( &p[0], "SVQ3", 4 );
745 memset( &p[4], 0, 8 );
746 memcpy( &p[12], p_dec->fmt_in.p_extra, i_size );
748 /* Now remove all atoms before the SMI one */
749 if( p_sys->p_context->extradata_size > 0x5a &&
750 strncmp( (char*)&p[0x56], "SMI ", 4 ) )
752 uint8_t *psz = &p[0x52];
754 while( psz < &p[p_sys->p_context->extradata_size - 8] )
756 int i_size = GetDWBE( psz );
759 /* FIXME handle 1 as long size */
762 if( !strncmp( (char*)&psz[4], "SMI ", 4 ) )
764 memmove( &p[0x52], psz,
765 &p[p_sys->p_context->extradata_size] - psz );
773 else if( p_dec->fmt_in.i_codec == VLC_FOURCC( 'R', 'V', '1', '0' ) ||
774 p_dec->fmt_in.i_codec == VLC_FOURCC( 'R', 'V', '1', '3' ) ||
775 p_dec->fmt_in.i_codec == VLC_FOURCC( 'R', 'V', '2', '0' ) )
777 if( p_dec->fmt_in.i_extra == 8 )
779 p_sys->p_context->extradata_size = 8;
780 p_sys->p_context->extradata = malloc( 8 );
781 if( p_sys->p_context->extradata )
783 memcpy( p_sys->p_context->extradata,
784 p_dec->fmt_in.p_extra, p_dec->fmt_in.i_extra );
785 p_sys->p_context->sub_id = ((uint32_t*)p_dec->fmt_in.p_extra)[1];
787 msg_Warn( p_dec, "using extra data for RV codec sub_id=%08x",
788 p_sys->p_context->sub_id );
794 p_sys->p_context->extradata_size = i_size;
795 p_sys->p_context->extradata =
796 malloc( i_size + FF_INPUT_BUFFER_PADDING_SIZE );
797 if( p_sys->p_context->extradata )
799 memcpy( p_sys->p_context->extradata,
800 p_dec->fmt_in.p_extra, i_size );
801 memset( &((uint8_t*)p_sys->p_context->extradata)[i_size],
802 0, FF_INPUT_BUFFER_PADDING_SIZE );
807 /*****************************************************************************
808 * ffmpeg_CopyPicture: copy a picture from ffmpeg internal buffers to a
809 * picture_t structure (when not in direct rendering mode).
810 *****************************************************************************/
811 static void ffmpeg_CopyPicture( decoder_t *p_dec,
812 picture_t *p_pic, AVFrame *p_ff_pic )
814 decoder_sys_t *p_sys = p_dec->p_sys;
816 if( TestFfmpegChroma( p_sys->p_context->pix_fmt, -1 ) == VLC_SUCCESS )
818 int i_plane, i_size, i_line;
819 uint8_t *p_dst, *p_src;
820 int i_src_stride, i_dst_stride;
822 for( i_plane = 0; i_plane < p_pic->i_planes; i_plane++ )
824 p_src = p_ff_pic->data[i_plane];
825 p_dst = p_pic->p[i_plane].p_pixels;
826 i_src_stride = p_ff_pic->linesize[i_plane];
827 i_dst_stride = p_pic->p[i_plane].i_pitch;
829 i_size = __MIN( i_src_stride, i_dst_stride );
830 for( i_line = 0; i_line < p_pic->p[i_plane].i_visible_lines;
833 vlc_memcpy( p_dst, p_src, i_size );
834 p_src += i_src_stride;
835 p_dst += i_dst_stride;
841 msg_Err( p_dec, "don't know how to convert chroma %i",
842 p_sys->p_context->pix_fmt );
847 /*****************************************************************************
848 * ffmpeg_GetFrameBuf: callback used by ffmpeg to get a frame buffer.
849 *****************************************************************************
850 * It is used for direct rendering as well as to get the right PTS for each
851 * decoded picture (even in indirect rendering mode).
852 *****************************************************************************/
853 static void ffmpeg_SetFrameBufferPts( decoder_t *p_dec, AVFrame *p_ff_pic );
855 static int ffmpeg_GetFrameBuf( struct AVCodecContext *p_context,
858 decoder_t *p_dec = (decoder_t *)p_context->opaque;
859 decoder_sys_t *p_sys = p_dec->p_sys;
862 /* Set picture PTS */
863 ffmpeg_SetFrameBufferPts( p_dec, p_ff_pic );
866 p_ff_pic->opaque = 0;
868 /* Not much to do in indirect rendering mode */
869 if( !p_sys->b_direct_rendering )
871 return avcodec_default_get_buffer( p_context, p_ff_pic );
874 /* Some codecs set pix_fmt only after the 1st frame has been decoded,
875 * so we need to check for direct rendering again. */
877 int i_width = p_sys->p_context->width;
878 int i_height = p_sys->p_context->height;
879 avcodec_align_dimensions( p_sys->p_context, &i_width, &i_height );
881 if( GetVlcChroma( &p_dec->fmt_out.video, p_context->pix_fmt ) != VLC_SUCCESS ||
882 p_sys->p_context->width % 16 || p_sys->p_context->height % 16 ||
883 /* We only pad picture up to 16 */
884 PAD(p_sys->p_context->width,16) < i_width || PAD(p_sys->p_context->height,16) < i_height ||
885 p_context->pix_fmt == PIX_FMT_PAL8 )
887 msg_Dbg( p_dec, "disabling direct rendering" );
888 p_sys->b_direct_rendering = 0;
889 return avcodec_default_get_buffer( p_context, p_ff_pic );
891 p_dec->fmt_out.i_codec = p_dec->fmt_out.video.i_chroma;
893 /* Get a new picture */
894 //p_sys->p_vout->render.b_allow_modify_pics = 0;
895 p_pic = ffmpeg_NewPictBuf( p_dec, p_sys->p_context );
898 p_sys->b_direct_rendering = 0;
899 return avcodec_default_get_buffer( p_context, p_ff_pic );
901 p_sys->p_context->draw_horiz_band = NULL;
903 p_ff_pic->opaque = (void*)p_pic;
904 p_ff_pic->type = FF_BUFFER_TYPE_USER;
905 p_ff_pic->data[0] = p_pic->p[0].p_pixels;
906 p_ff_pic->data[1] = p_pic->p[1].p_pixels;
907 p_ff_pic->data[2] = p_pic->p[2].p_pixels;
908 p_ff_pic->data[3] = NULL; /* alpha channel but I'm not sure */
910 p_ff_pic->linesize[0] = p_pic->p[0].i_pitch;
911 p_ff_pic->linesize[1] = p_pic->p[1].i_pitch;
912 p_ff_pic->linesize[2] = p_pic->p[2].i_pitch;
913 p_ff_pic->linesize[3] = 0;
915 if( p_ff_pic->reference != 0 )
917 decoder_LinkPicture( p_dec, p_pic );
920 /* FIXME what is that, should give good value */
921 p_ff_pic->age = 256*256*256*64; // FIXME FIXME from ffmpeg
925 static int ffmpeg_ReGetFrameBuf( struct AVCodecContext *p_context, AVFrame *p_ff_pic )
927 decoder_t *p_dec = (decoder_t *)p_context->opaque;
931 p_ff_pic->pts = AV_NOPTS_VALUE;
933 /* We always use default reget function, it works perfectly fine */
934 i_ret = avcodec_default_reget_buffer( p_context, p_ff_pic );
936 /* Set picture PTS if avcodec_default_reget_buffer didn't set it (through a
937 * ffmpeg_GetFrameBuf call) */
938 if( !i_ret && p_ff_pic->pts == AV_NOPTS_VALUE )
939 ffmpeg_SetFrameBufferPts( p_dec, p_ff_pic );
944 static void ffmpeg_SetFrameBufferPts( decoder_t *p_dec, AVFrame *p_ff_pic )
946 decoder_sys_t *p_sys = p_dec->p_sys;
948 /* Set picture PTS */
949 if( p_sys->input_pts )
951 p_ff_pic->pts = p_sys->input_pts;
953 else if( p_sys->input_dts )
955 /* Some demuxers only set the dts so let's try to find a useful
956 * timestamp from this */
957 if( !p_sys->p_context->has_b_frames || !p_sys->b_has_b_frames ||
958 !p_ff_pic->reference || !p_sys->i_pts )
960 p_ff_pic->pts = p_sys->input_dts;
972 if( p_sys->i_pts ) /* make sure 1st frame has a pts > 0 */
974 p_sys->input_pts = p_sys->input_dts = 0;
978 static void ffmpeg_ReleaseFrameBuf( struct AVCodecContext *p_context,
981 decoder_t *p_dec = (decoder_t *)p_context->opaque;
984 if( !p_ff_pic->opaque )
986 avcodec_default_release_buffer( p_context, p_ff_pic );
990 p_pic = (picture_t*)p_ff_pic->opaque;
992 p_ff_pic->data[0] = NULL;
993 p_ff_pic->data[1] = NULL;
994 p_ff_pic->data[2] = NULL;
995 p_ff_pic->data[3] = NULL;
997 if( p_ff_pic->reference != 0 )
999 decoder_UnlinkPicture( p_dec, p_pic );
1003 static void ffmpeg_NextPts( decoder_t *p_dec )
1005 decoder_sys_t *p_sys = p_dec->p_sys;
1007 if( p_sys->i_pts <= 0 )
1010 /* interpolate the next PTS */
1011 if( p_dec->fmt_in.video.i_frame_rate > 0 &&
1012 p_dec->fmt_in.video.i_frame_rate_base > 0 )
1014 p_sys->i_pts += INT64_C(1000000) *
1015 (2 + p_sys->p_ff_pic->repeat_pict) *
1016 p_dec->fmt_in.video.i_frame_rate_base /
1017 (2 * p_dec->fmt_in.video.i_frame_rate);
1019 else if( p_sys->p_context->time_base.den > 0 )
1021 p_sys->i_pts += INT64_C(1000000) *
1022 (2 + p_sys->p_ff_pic->repeat_pict) *
1023 p_sys->p_context->time_base.num /
1024 (2 * p_sys->p_context->time_base.den);