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 = calloc( 1, sizeof(decoder_sys_t) ) ) == NULL )
189 p_dec->p_sys->p_context = p_context;
190 p_dec->p_sys->p_codec = p_codec;
191 p_dec->p_sys->i_codec_id = i_codec_id;
192 p_dec->p_sys->psz_namecodec = psz_namecodec;
193 p_sys->p_ff_pic = avcodec_alloc_frame();
195 /* ***** Fill p_context with init values ***** */
196 p_sys->p_context->codec_tag = ffmpeg_CodecTag( p_dec->fmt_in.i_codec );
197 p_sys->p_context->width = p_dec->fmt_in.video.i_width;
198 p_sys->p_context->height = p_dec->fmt_in.video.i_height;
199 #if LIBAVCODEC_VERSION_INT < ((52<<16)+(0<<8)+0)
200 p_sys->p_context->bits_per_sample = p_dec->fmt_in.video.i_bits_per_pixel;
202 p_sys->p_context->bits_per_coded_sample = p_dec->fmt_in.video.i_bits_per_pixel;
205 /* ***** Get configuration of ffmpeg plugin ***** */
206 p_sys->p_context->workaround_bugs =
207 config_GetInt( p_dec, "ffmpeg-workaround-bugs" );
208 #if LIBAVCODEC_VERSION_INT < ((52<<16)+(0<<8)+0)
209 p_sys->p_context->error_resilience =
210 config_GetInt( p_dec, "ffmpeg-error-resilience" );
212 p_sys->p_context->error_recognition =
213 config_GetInt( p_dec, "ffmpeg-error-resilience" );
216 var_Create( p_dec, "grayscale", VLC_VAR_BOOL | VLC_VAR_DOINHERIT );
217 var_Get( p_dec, "grayscale", &val );
218 if( val.b_bool ) p_sys->p_context->flags |= CODEC_FLAG_GRAY;
220 var_Create( p_dec, "ffmpeg-vismv", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT );
221 var_Get( p_dec, "ffmpeg-vismv", &val );
222 if( val.i_int ) p_sys->p_context->debug_mv = val.i_int;
224 var_Create( p_dec, "ffmpeg-lowres", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT );
225 var_Get( p_dec, "ffmpeg-lowres", &val );
226 if( val.i_int > 0 && val.i_int <= 2 ) p_sys->p_context->lowres = val.i_int;
228 var_Create( p_dec, "ffmpeg-skiploopfilter",
229 VLC_VAR_INTEGER | VLC_VAR_DOINHERIT );
230 var_Get( p_dec, "ffmpeg-skiploopfilter", &val );
231 if( val.i_int > 0 ) p_sys->p_context->skip_loop_filter = AVDISCARD_NONREF;
232 if( val.i_int > 1 ) p_sys->p_context->skip_loop_filter = AVDISCARD_BIDIR;
233 if( val.i_int > 2 ) p_sys->p_context->skip_loop_filter = AVDISCARD_NONKEY;
234 if( val.i_int > 3 ) p_sys->p_context->skip_loop_filter = AVDISCARD_ALL;
236 /* ***** ffmpeg frame skipping ***** */
237 var_Create( p_dec, "ffmpeg-hurry-up", VLC_VAR_BOOL | VLC_VAR_DOINHERIT );
238 var_Get( p_dec, "ffmpeg-hurry-up", &val );
239 p_sys->b_hurry_up = val.b_bool;
241 var_Create( p_dec, "ffmpeg-skip-frame", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT );
242 var_Get( p_dec, "ffmpeg-skip-frame", &val );
246 p_sys->p_context->skip_frame = AVDISCARD_NONE;
249 p_sys->p_context->skip_frame = AVDISCARD_DEFAULT;
252 p_sys->p_context->skip_frame = AVDISCARD_BIDIR;
255 p_sys->p_context->skip_frame = AVDISCARD_NONKEY;
258 p_sys->p_context->skip_frame = AVDISCARD_ALL;
261 p_sys->p_context->skip_frame = AVDISCARD_NONE;
264 p_sys->i_skip_frame = p_sys->p_context->skip_frame;
266 var_Create( p_dec, "ffmpeg-skip-idct", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT );
267 var_Get( p_dec, "ffmpeg-skip-idct", &val );
271 p_sys->p_context->skip_idct = AVDISCARD_NONE;
274 p_sys->p_context->skip_idct = AVDISCARD_DEFAULT;
277 p_sys->p_context->skip_idct = AVDISCARD_BIDIR;
280 p_sys->p_context->skip_idct = AVDISCARD_NONKEY;
283 p_sys->p_context->skip_idct = AVDISCARD_ALL;
286 p_sys->p_context->skip_idct = AVDISCARD_NONE;
289 p_sys->i_skip_idct = p_sys->p_context->skip_idct;
291 /* ***** ffmpeg direct rendering ***** */
292 p_sys->b_direct_rendering = 0;
293 var_Create( p_dec, "ffmpeg-dr", VLC_VAR_BOOL | VLC_VAR_DOINHERIT );
294 var_Get( p_dec, "ffmpeg-dr", &val );
295 if( val.b_bool && (p_sys->p_codec->capabilities & CODEC_CAP_DR1) &&
296 /* Apparently direct rendering doesn't work with YUV422P */
297 p_sys->p_context->pix_fmt != PIX_FMT_YUV422P &&
298 /* H264 uses too many reference frames */
299 p_sys->i_codec_id != CODEC_ID_H264 &&
300 !p_sys->p_context->debug_mv )
302 /* Some codecs set pix_fmt only after the 1st frame has been decoded,
303 * so we need to do another check in ffmpeg_GetFrameBuf() */
304 p_sys->b_direct_rendering = 1;
307 /* ffmpeg doesn't properly release old pictures when frames are skipped */
308 //if( p_sys->b_hurry_up ) p_sys->b_direct_rendering = 0;
309 if( p_sys->b_direct_rendering )
311 msg_Dbg( p_dec, "using direct rendering" );
312 p_sys->p_context->flags |= CODEC_FLAG_EMU_EDGE;
315 /* Always use our get_buffer wrapper so we can calculate the
317 p_sys->p_context->get_buffer = ffmpeg_GetFrameBuf;
318 p_sys->p_context->reget_buffer = ffmpeg_ReGetFrameBuf;
319 p_sys->p_context->release_buffer = ffmpeg_ReleaseFrameBuf;
320 p_sys->p_context->opaque = p_dec;
322 /* ***** init this codec with special data ***** */
323 ffmpeg_InitCodec( p_dec );
325 /* ***** misc init ***** */
326 p_sys->input_pts = p_sys->input_dts = 0;
328 p_sys->b_has_b_frames = false;
329 p_sys->b_first_frame = true;
330 p_sys->b_flush = false;
331 p_sys->i_late_frames = 0;
333 p_sys->i_buffer_orig = 1;
334 p_sys->p_buffer_orig = p_sys->p_buffer = malloc( p_sys->i_buffer_orig );
335 if( !p_sys->p_buffer_orig )
341 /* Set output properties */
342 p_dec->fmt_out.i_cat = VIDEO_ES;
343 if( GetVlcChroma( &p_dec->fmt_out.video, p_context->pix_fmt ) != VLC_SUCCESS )
345 /* we are doomed. but not really, because most codecs set their pix_fmt later on */
346 p_dec->fmt_out.i_codec = VLC_FOURCC('I','4','2','0');
348 p_dec->fmt_out.i_codec = p_dec->fmt_out.video.i_chroma;
351 memset( &p_sys->palette, 0, sizeof(p_sys->palette) );
352 if( p_dec->fmt_in.video.p_palette )
354 p_sys->palette.palette_changed = 1;
356 for( int i = 0; i < __MIN( AVPALETTE_COUNT, p_dec->fmt_in.video.p_palette->i_entries ); i++ )
362 c.a[0] = p_dec->fmt_in.video.p_palette->palette[i][0];
363 c.a[1] = p_dec->fmt_in.video.p_palette->palette[i][1];
364 c.a[2] = p_dec->fmt_in.video.p_palette->palette[i][2];
365 c.a[3] = p_dec->fmt_in.video.p_palette->palette[i][3];
367 p_sys->palette.palette[i] = c.u;
369 p_sys->p_context->palctrl = &p_sys->palette;
371 p_dec->fmt_out.video.p_palette = malloc( sizeof(video_palette_t) );
372 if( p_dec->fmt_out.video.p_palette )
373 *p_dec->fmt_out.video.p_palette = *p_dec->fmt_in.video.p_palette;
375 else if( p_sys->i_codec_id != CODEC_ID_MSVIDEO1 && p_sys->i_codec_id != CODEC_ID_CINEPAK )
377 p_sys->p_context->palctrl = &p_sys->palette;
380 /* ***** Open the codec ***** */
381 vlc_mutex_lock( &avcodec_lock );
382 if( avcodec_open( p_sys->p_context, p_sys->p_codec ) < 0 )
384 vlc_mutex_unlock( &avcodec_lock );
385 msg_Err( p_dec, "cannot open codec (%s)", p_sys->psz_namecodec );
386 free( p_sys->p_buffer_orig );
390 vlc_mutex_unlock( &avcodec_lock );
391 msg_Dbg( p_dec, "ffmpeg codec (%s) started", p_sys->psz_namecodec );
397 /*****************************************************************************
398 * DecodeVideo: Called to decode one or more frames
399 *****************************************************************************/
400 picture_t *DecodeVideo( decoder_t *p_dec, block_t **pp_block )
402 decoder_sys_t *p_sys = p_dec->p_sys;
404 int b_null_size = false;
407 if( !pp_block || !*pp_block ) return NULL;
409 if( !p_sys->p_context->extradata_size && p_dec->fmt_in.i_extra )
410 ffmpeg_InitCodec( p_dec );
414 if( p_block->i_flags & (BLOCK_FLAG_DISCONTINUITY|BLOCK_FLAG_CORRUPTED) )
417 p_sys->i_pts = 0; /* To make sure we recover properly */
419 p_sys->input_pts = p_sys->input_dts = 0;
420 p_sys->i_late_frames = 0;
422 block_Release( p_block );
424 //if( p_block->i_flags & BLOCK_FLAG_CORRUPTED )
425 //avcodec_flush_buffers( p_sys->p_context );
429 if( p_block->i_flags & BLOCK_FLAG_PREROLL )
431 /* Do not care about late frames when prerolling
432 * TODO avoid decoding of non reference frame
433 * (ie all B except for H264 where it depends only on nal_ref_idc) */
434 p_sys->i_late_frames = 0;
437 if( !p_dec->b_pace_control && (p_sys->i_late_frames > 0) &&
438 (mdate() - p_sys->i_late_frames_start > INT64_C(5000000)) )
442 msg_Err( p_dec, "more than 5 seconds of late video -> "
443 "dropping frame (computer too slow ?)" );
444 p_sys->i_pts = 0; /* To make sure we recover properly */
446 block_Release( p_block );
447 p_sys->i_late_frames--;
451 if( p_block->i_pts > 0 || p_block->i_dts > 0 )
453 p_sys->input_pts = p_block->i_pts;
454 p_sys->input_dts = p_block->i_dts;
456 /* Make sure we don't reuse the same timestamps twice */
457 p_block->i_pts = p_block->i_dts = 0;
460 /* A good idea could be to decode all I pictures and see for the other */
461 if( !p_dec->b_pace_control &&
463 (p_sys->i_late_frames > 4) )
466 if( p_sys->i_late_frames < 12 )
468 p_sys->p_context->skip_frame =
469 (p_sys->i_skip_frame <= AVDISCARD_BIDIR) ?
470 AVDISCARD_BIDIR : p_sys->i_skip_frame;
474 /* picture too late, won't decode
475 * but break picture until a new I, and for mpeg4 ...*/
476 p_sys->i_late_frames--; /* needed else it will never be decrease */
477 block_Release( p_block );
484 if( p_sys->b_hurry_up )
485 p_sys->p_context->skip_frame = p_sys->i_skip_frame;
486 if( !(p_block->i_flags & BLOCK_FLAG_PREROLL) )
492 if( p_sys->p_context->width <= 0 || p_sys->p_context->height <= 0 )
494 if( p_sys->b_hurry_up )
495 p_sys->p_context->skip_frame = p_sys->i_skip_frame;
500 * Do the actual decoding now
503 /* Don't forget that ffmpeg requires a little more bytes
504 * that the real frame size */
505 if( p_block->i_buffer > 0 )
507 p_sys->b_flush = ( p_block->i_flags & BLOCK_FLAG_END_OF_SEQUENCE ) != 0;
509 p_sys->i_buffer = p_block->i_buffer;
510 if( p_sys->i_buffer + FF_INPUT_BUFFER_PADDING_SIZE >
511 p_sys->i_buffer_orig )
513 free( p_sys->p_buffer_orig );
514 p_sys->i_buffer_orig =
515 p_block->i_buffer + FF_INPUT_BUFFER_PADDING_SIZE;
516 p_sys->p_buffer_orig = malloc( p_sys->i_buffer_orig );
518 p_sys->p_buffer = p_sys->p_buffer_orig;
519 p_sys->i_buffer = p_block->i_buffer;
520 if( !p_sys->p_buffer )
522 block_Release( p_block );
525 vlc_memcpy( p_sys->p_buffer, p_block->p_buffer, p_block->i_buffer );
526 memset( p_sys->p_buffer + p_block->i_buffer, 0,
527 FF_INPUT_BUFFER_PADDING_SIZE );
529 p_block->i_buffer = 0;
532 while( p_sys->i_buffer > 0 || p_sys->b_flush )
534 int i_used, b_gotpicture;
537 i_used = avcodec_decode_video( p_sys->p_context, p_sys->p_ff_pic,
539 p_sys->i_buffer <= 0 && p_sys->b_flush ? NULL : (uint8_t*)p_sys->p_buffer, p_sys->i_buffer );
541 if( b_null_size && p_sys->p_context->width > 0 &&
542 p_sys->p_context->height > 0 &&
545 /* Reparse it to not drop the I frame */
547 if( p_sys->b_hurry_up )
548 p_sys->p_context->skip_frame = p_sys->i_skip_frame;
549 i_used = avcodec_decode_video( p_sys->p_context, p_sys->p_ff_pic,
551 (uint8_t*)p_sys->p_buffer, p_sys->i_buffer );
555 p_sys->b_first_frame = true;
557 if( p_sys->i_buffer <= 0 )
558 p_sys->b_flush = false;
562 msg_Warn( p_dec, "cannot decode one frame (%d bytes)",
564 block_Release( p_block );
567 else if( i_used > p_sys->i_buffer )
569 i_used = p_sys->i_buffer;
573 p_sys->i_buffer -= i_used;
574 p_sys->p_buffer += i_used;
576 /* Nothing to display */
579 if( i_used == 0 ) break;
584 if( p_sys->p_ff_pic->pts )
585 p_sys->i_pts = p_sys->p_ff_pic->pts;
587 /* Update frame late count (except when doing preroll) */
588 mtime_t i_display_date = 0;
589 if( !(p_block->i_flags & BLOCK_FLAG_PREROLL) )
590 i_display_date = decoder_GetDisplayDate( p_dec, p_sys->i_pts );
592 if( i_display_date > 0 && i_display_date <= mdate() )
594 p_sys->i_late_frames++;
595 if( p_sys->i_late_frames == 1 )
596 p_sys->i_late_frames_start = mdate();
600 p_sys->i_late_frames = 0;
603 if( !b_drawpicture || !p_sys->p_ff_pic->linesize[0] )
605 /* Do not display the picture */
606 p_pic = (picture_t *)p_sys->p_ff_pic->opaque;
607 if( !b_drawpicture && p_pic )
608 decoder_DeletePicture( p_dec, p_pic );
610 ffmpeg_NextPts( p_dec );
614 if( !p_sys->p_ff_pic->opaque )
616 /* Get a new picture */
617 p_pic = ffmpeg_NewPictBuf( p_dec, p_sys->p_context );
620 block_Release( p_block );
624 /* Fill p_picture_t from AVVideoFrame and do chroma conversion
626 ffmpeg_CopyPicture( p_dec, p_pic, p_sys->p_ff_pic );
630 p_pic = (picture_t *)p_sys->p_ff_pic->opaque;
633 /* Sanity check (seems to be needed for some streams) */
634 if( p_sys->p_ff_pic->pict_type == FF_B_TYPE )
636 p_sys->b_has_b_frames = true;
639 if( !p_dec->fmt_in.video.i_aspect )
641 /* Fetch again the aspect ratio in case it changed */
642 p_dec->fmt_out.video.i_aspect =
644 * ( av_q2d(p_sys->p_context->sample_aspect_ratio)
645 * p_sys->p_context->width / p_sys->p_context->height );
646 p_dec->fmt_out.video.i_sar_num
647 = p_sys->p_context->sample_aspect_ratio.num;
648 p_dec->fmt_out.video.i_sar_den
649 = p_sys->p_context->sample_aspect_ratio.den;
651 if( p_dec->fmt_out.video.i_aspect == 0 )
653 p_dec->fmt_out.video.i_aspect = VOUT_ASPECT_FACTOR
654 * p_sys->p_context->width / p_sys->p_context->height;
658 /* Send decoded frame to vout */
661 p_pic->date = p_sys->i_pts;
663 ffmpeg_NextPts( p_dec );
665 if( p_sys->b_first_frame )
667 /* Hack to force display of still pictures */
668 p_sys->b_first_frame = false;
669 p_pic->b_force = true;
672 p_pic->i_nb_fields = 2 + p_sys->p_ff_pic->repeat_pict;
673 p_pic->b_progressive = !p_sys->p_ff_pic->interlaced_frame;
674 p_pic->b_top_field_first = p_sys->p_ff_pic->top_field_first;
676 p_pic->i_qstride = p_sys->p_ff_pic->qstride;
677 int i_mb_h = ( p_pic->format.i_height + 15 ) / 16;
678 p_pic->p_q = malloc( p_pic->i_qstride * i_mb_h );
679 memcpy( p_pic->p_q, p_sys->p_ff_pic->qscale_table,
680 p_pic->i_qstride * i_mb_h );
681 switch( p_sys->p_ff_pic->qscale_type )
683 case FF_QSCALE_TYPE_MPEG1:
684 p_pic->i_qtype = QTYPE_MPEG1;
686 case FF_QSCALE_TYPE_MPEG2:
687 p_pic->i_qtype = QTYPE_MPEG2;
689 case FF_QSCALE_TYPE_H264:
690 p_pic->i_qtype = QTYPE_H264;
698 decoder_DeletePicture( p_dec, p_pic );
702 block_Release( p_block );
706 /*****************************************************************************
707 * EndVideo: decoder destruction
708 *****************************************************************************
709 * This function is called when the thread ends after a successful
711 *****************************************************************************/
712 void EndVideoDec( decoder_t *p_dec )
714 decoder_sys_t *p_sys = p_dec->p_sys;
716 if( p_sys->p_ff_pic ) av_free( p_sys->p_ff_pic );
717 free( p_sys->p_buffer_orig );
720 /*****************************************************************************
721 * ffmpeg_InitCodec: setup codec extra initialization data for ffmpeg
722 *****************************************************************************/
723 static void ffmpeg_InitCodec( decoder_t *p_dec )
725 decoder_sys_t *p_sys = p_dec->p_sys;
726 int i_size = p_dec->fmt_in.i_extra;
728 if( !i_size ) return;
730 if( p_sys->i_codec_id == CODEC_ID_SVQ3 )
734 p_sys->p_context->extradata_size = i_size + 12;
735 p = p_sys->p_context->extradata =
736 malloc( p_sys->p_context->extradata_size );
740 memcpy( &p[0], "SVQ3", 4 );
741 memset( &p[4], 0, 8 );
742 memcpy( &p[12], p_dec->fmt_in.p_extra, i_size );
744 /* Now remove all atoms before the SMI one */
745 if( p_sys->p_context->extradata_size > 0x5a &&
746 strncmp( (char*)&p[0x56], "SMI ", 4 ) )
748 uint8_t *psz = &p[0x52];
750 while( psz < &p[p_sys->p_context->extradata_size - 8] )
752 int i_size = GetDWBE( psz );
755 /* FIXME handle 1 as long size */
758 if( !strncmp( (char*)&psz[4], "SMI ", 4 ) )
760 memmove( &p[0x52], psz,
761 &p[p_sys->p_context->extradata_size] - psz );
769 else if( p_dec->fmt_in.i_codec == VLC_FOURCC( 'R', 'V', '1', '0' ) ||
770 p_dec->fmt_in.i_codec == VLC_FOURCC( 'R', 'V', '1', '3' ) ||
771 p_dec->fmt_in.i_codec == VLC_FOURCC( 'R', 'V', '2', '0' ) )
773 if( p_dec->fmt_in.i_extra == 8 )
775 p_sys->p_context->extradata_size = 8;
776 p_sys->p_context->extradata = malloc( 8 );
777 if( p_sys->p_context->extradata )
779 memcpy( p_sys->p_context->extradata,
780 p_dec->fmt_in.p_extra, p_dec->fmt_in.i_extra );
781 p_sys->p_context->sub_id = ((uint32_t*)p_dec->fmt_in.p_extra)[1];
783 msg_Warn( p_dec, "using extra data for RV codec sub_id=%08x",
784 p_sys->p_context->sub_id );
790 p_sys->p_context->extradata_size = i_size;
791 p_sys->p_context->extradata =
792 malloc( i_size + FF_INPUT_BUFFER_PADDING_SIZE );
793 if( p_sys->p_context->extradata )
795 memcpy( p_sys->p_context->extradata,
796 p_dec->fmt_in.p_extra, i_size );
797 memset( &((uint8_t*)p_sys->p_context->extradata)[i_size],
798 0, FF_INPUT_BUFFER_PADDING_SIZE );
803 /*****************************************************************************
804 * ffmpeg_CopyPicture: copy a picture from ffmpeg internal buffers to a
805 * picture_t structure (when not in direct rendering mode).
806 *****************************************************************************/
807 static void ffmpeg_CopyPicture( decoder_t *p_dec,
808 picture_t *p_pic, AVFrame *p_ff_pic )
810 decoder_sys_t *p_sys = p_dec->p_sys;
812 if( TestFfmpegChroma( p_sys->p_context->pix_fmt, -1 ) == VLC_SUCCESS )
814 int i_plane, i_size, i_line;
815 uint8_t *p_dst, *p_src;
816 int i_src_stride, i_dst_stride;
818 for( i_plane = 0; i_plane < p_pic->i_planes; i_plane++ )
820 p_src = p_ff_pic->data[i_plane];
821 p_dst = p_pic->p[i_plane].p_pixels;
822 i_src_stride = p_ff_pic->linesize[i_plane];
823 i_dst_stride = p_pic->p[i_plane].i_pitch;
825 i_size = __MIN( i_src_stride, i_dst_stride );
826 for( i_line = 0; i_line < p_pic->p[i_plane].i_visible_lines;
829 vlc_memcpy( p_dst, p_src, i_size );
830 p_src += i_src_stride;
831 p_dst += i_dst_stride;
837 msg_Err( p_dec, "don't know how to convert chroma %i",
838 p_sys->p_context->pix_fmt );
843 /*****************************************************************************
844 * ffmpeg_GetFrameBuf: callback used by ffmpeg to get a frame buffer.
845 *****************************************************************************
846 * It is used for direct rendering as well as to get the right PTS for each
847 * decoded picture (even in indirect rendering mode).
848 *****************************************************************************/
849 static void ffmpeg_SetFrameBufferPts( decoder_t *p_dec, AVFrame *p_ff_pic );
851 static int ffmpeg_GetFrameBuf( struct AVCodecContext *p_context,
854 decoder_t *p_dec = (decoder_t *)p_context->opaque;
855 decoder_sys_t *p_sys = p_dec->p_sys;
858 /* Set picture PTS */
859 ffmpeg_SetFrameBufferPts( p_dec, p_ff_pic );
862 p_ff_pic->opaque = 0;
864 /* Not much to do in indirect rendering mode */
865 if( !p_sys->b_direct_rendering )
867 return avcodec_default_get_buffer( p_context, p_ff_pic );
870 /* Some codecs set pix_fmt only after the 1st frame has been decoded,
871 * so we need to check for direct rendering again. */
873 int i_width = p_sys->p_context->width;
874 int i_height = p_sys->p_context->height;
875 avcodec_align_dimensions( p_sys->p_context, &i_width, &i_height );
877 if( GetVlcChroma( &p_dec->fmt_out.video, p_context->pix_fmt ) != VLC_SUCCESS ||
878 p_sys->p_context->width % 16 || p_sys->p_context->height % 16 ||
879 /* We only pad picture up to 16 */
880 PAD(p_sys->p_context->width,16) < i_width || PAD(p_sys->p_context->height,16) < i_height ||
881 p_context->pix_fmt == PIX_FMT_PAL8 )
883 msg_Dbg( p_dec, "disabling direct rendering" );
884 p_sys->b_direct_rendering = 0;
885 return avcodec_default_get_buffer( p_context, p_ff_pic );
887 p_dec->fmt_out.i_codec = p_dec->fmt_out.video.i_chroma;
889 /* Get a new picture */
890 //p_sys->p_vout->render.b_allow_modify_pics = 0;
891 p_pic = ffmpeg_NewPictBuf( p_dec, p_sys->p_context );
894 p_sys->b_direct_rendering = 0;
895 return avcodec_default_get_buffer( p_context, p_ff_pic );
897 p_sys->p_context->draw_horiz_band = NULL;
899 p_ff_pic->opaque = (void*)p_pic;
900 p_ff_pic->type = FF_BUFFER_TYPE_USER;
901 p_ff_pic->data[0] = p_pic->p[0].p_pixels;
902 p_ff_pic->data[1] = p_pic->p[1].p_pixels;
903 p_ff_pic->data[2] = p_pic->p[2].p_pixels;
904 p_ff_pic->data[3] = NULL; /* alpha channel but I'm not sure */
906 p_ff_pic->linesize[0] = p_pic->p[0].i_pitch;
907 p_ff_pic->linesize[1] = p_pic->p[1].i_pitch;
908 p_ff_pic->linesize[2] = p_pic->p[2].i_pitch;
909 p_ff_pic->linesize[3] = 0;
911 if( p_ff_pic->reference != 0 )
913 decoder_LinkPicture( p_dec, p_pic );
916 /* FIXME what is that, should give good value */
917 p_ff_pic->age = 256*256*256*64; // FIXME FIXME from ffmpeg
921 static int ffmpeg_ReGetFrameBuf( struct AVCodecContext *p_context, AVFrame *p_ff_pic )
923 decoder_t *p_dec = (decoder_t *)p_context->opaque;
927 p_ff_pic->pts = AV_NOPTS_VALUE;
929 /* We always use default reget function, it works perfectly fine */
930 i_ret = avcodec_default_reget_buffer( p_context, p_ff_pic );
932 /* Set picture PTS if avcodec_default_reget_buffer didn't set it (through a
933 * ffmpeg_GetFrameBuf call) */
934 if( !i_ret && p_ff_pic->pts == AV_NOPTS_VALUE )
935 ffmpeg_SetFrameBufferPts( p_dec, p_ff_pic );
940 static void ffmpeg_SetFrameBufferPts( decoder_t *p_dec, AVFrame *p_ff_pic )
942 decoder_sys_t *p_sys = p_dec->p_sys;
944 /* Set picture PTS */
945 if( p_sys->input_pts )
947 p_ff_pic->pts = p_sys->input_pts;
949 else if( p_sys->input_dts )
951 /* Some demuxers only set the dts so let's try to find a useful
952 * timestamp from this */
953 if( !p_sys->p_context->has_b_frames || !p_sys->b_has_b_frames ||
954 !p_ff_pic->reference || !p_sys->i_pts )
956 p_ff_pic->pts = p_sys->input_dts;
968 if( p_sys->i_pts ) /* make sure 1st frame has a pts > 0 */
970 p_sys->input_pts = p_sys->input_dts = 0;
974 static void ffmpeg_ReleaseFrameBuf( struct AVCodecContext *p_context,
977 decoder_t *p_dec = (decoder_t *)p_context->opaque;
980 if( !p_ff_pic->opaque )
982 avcodec_default_release_buffer( p_context, p_ff_pic );
986 p_pic = (picture_t*)p_ff_pic->opaque;
988 p_ff_pic->data[0] = NULL;
989 p_ff_pic->data[1] = NULL;
990 p_ff_pic->data[2] = NULL;
991 p_ff_pic->data[3] = NULL;
993 if( p_ff_pic->reference != 0 )
995 decoder_UnlinkPicture( p_dec, p_pic );
999 static void ffmpeg_NextPts( decoder_t *p_dec )
1001 decoder_sys_t *p_sys = p_dec->p_sys;
1003 if( p_sys->i_pts <= 0 )
1006 /* interpolate the next PTS */
1007 if( p_dec->fmt_in.video.i_frame_rate > 0 &&
1008 p_dec->fmt_in.video.i_frame_rate_base > 0 )
1010 p_sys->i_pts += INT64_C(1000000) *
1011 (2 + p_sys->p_ff_pic->repeat_pict) *
1012 p_dec->fmt_in.video.i_frame_rate_base /
1013 (2 * p_dec->fmt_in.video.i_frame_rate);
1015 else if( p_sys->p_context->time_base.den > 0 )
1017 p_sys->i_pts += INT64_C(1000000) *
1018 (2 + p_sys->p_ff_pic->repeat_pict) *
1019 p_sys->p_context->time_base.num /
1020 (2 * p_sys->p_context->time_base.den);