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_CODEC_I420;
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_original_fourcc ?: 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 bool b_fast = var_CreateGetBool( p_dec, "ffmpeg-fast" );
232 if( b_fast ) p_sys->p_context->flags2 |= CODEC_FLAG2_FAST;
234 /* ***** ffmpeg frame skipping ***** */
235 var_Create( p_dec, "ffmpeg-hurry-up", VLC_VAR_BOOL | VLC_VAR_DOINHERIT );
236 var_Get( p_dec, "ffmpeg-hurry-up", &val );
237 p_sys->b_hurry_up = val.b_bool;
239 var_Create( p_dec, "ffmpeg-skip-frame", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT );
240 var_Get( p_dec, "ffmpeg-skip-frame", &val );
244 p_sys->p_context->skip_frame = AVDISCARD_NONE;
247 p_sys->p_context->skip_frame = AVDISCARD_DEFAULT;
250 p_sys->p_context->skip_frame = AVDISCARD_BIDIR;
253 p_sys->p_context->skip_frame = AVDISCARD_NONKEY;
256 p_sys->p_context->skip_frame = AVDISCARD_ALL;
259 p_sys->p_context->skip_frame = AVDISCARD_NONE;
262 p_sys->i_skip_frame = p_sys->p_context->skip_frame;
264 var_Create( p_dec, "ffmpeg-skip-idct", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT );
265 var_Get( p_dec, "ffmpeg-skip-idct", &val );
269 p_sys->p_context->skip_idct = AVDISCARD_NONE;
272 p_sys->p_context->skip_idct = AVDISCARD_DEFAULT;
275 p_sys->p_context->skip_idct = AVDISCARD_BIDIR;
278 p_sys->p_context->skip_idct = AVDISCARD_NONKEY;
281 p_sys->p_context->skip_idct = AVDISCARD_ALL;
284 p_sys->p_context->skip_idct = AVDISCARD_NONE;
287 p_sys->i_skip_idct = p_sys->p_context->skip_idct;
289 /* ***** ffmpeg direct rendering ***** */
290 p_sys->b_direct_rendering = false;
291 var_Create( p_dec, "ffmpeg-dr", VLC_VAR_BOOL | VLC_VAR_DOINHERIT );
292 var_Get( p_dec, "ffmpeg-dr", &val );
293 if( val.b_bool && (p_sys->p_codec->capabilities & CODEC_CAP_DR1) &&
294 /* Apparently direct rendering doesn't work with YUV422P */
295 p_sys->p_context->pix_fmt != PIX_FMT_YUV422P &&
296 /* H264 uses too many reference frames */
297 p_sys->i_codec_id != CODEC_ID_H264 &&
298 /* No idea why ... but this fixes flickering on some TSCC streams */
299 p_sys->i_codec_id != CODEC_ID_TSCC &&
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 = true;
307 /* ffmpeg doesn't properly release old pictures when frames are skipped */
308 //if( p_sys->b_hurry_up ) p_sys->b_direct_rendering = false;
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 /* ***** misc init ***** */
323 p_sys->input_pts = p_sys->input_dts = 0;
325 p_sys->b_has_b_frames = false;
326 p_sys->b_first_frame = true;
327 p_sys->b_flush = false;
328 p_sys->i_late_frames = 0;
330 p_sys->i_buffer_orig = 1;
331 p_sys->p_buffer_orig = p_sys->p_buffer = malloc( p_sys->i_buffer_orig );
332 if( !p_sys->p_buffer_orig )
338 /* Set output properties */
339 p_dec->fmt_out.i_cat = VIDEO_ES;
340 if( GetVlcChroma( &p_dec->fmt_out.video, p_context->pix_fmt ) != VLC_SUCCESS )
342 /* we are doomed. but not really, because most codecs set their pix_fmt later on */
343 p_dec->fmt_out.i_codec = VLC_CODEC_I420;
345 p_dec->fmt_out.i_codec = p_dec->fmt_out.video.i_chroma;
348 memset( &p_sys->palette, 0, sizeof(p_sys->palette) );
349 if( p_dec->fmt_in.video.p_palette )
351 p_sys->palette.palette_changed = 1;
353 for( int i = 0; i < __MIN( AVPALETTE_COUNT, p_dec->fmt_in.video.p_palette->i_entries ); i++ )
359 c.a[0] = p_dec->fmt_in.video.p_palette->palette[i][0];
360 c.a[1] = p_dec->fmt_in.video.p_palette->palette[i][1];
361 c.a[2] = p_dec->fmt_in.video.p_palette->palette[i][2];
362 c.a[3] = p_dec->fmt_in.video.p_palette->palette[i][3];
364 p_sys->palette.palette[i] = c.u;
366 p_sys->p_context->palctrl = &p_sys->palette;
368 p_dec->fmt_out.video.p_palette = malloc( sizeof(video_palette_t) );
369 if( p_dec->fmt_out.video.p_palette )
370 *p_dec->fmt_out.video.p_palette = *p_dec->fmt_in.video.p_palette;
372 else if( p_sys->i_codec_id != CODEC_ID_MSVIDEO1 && p_sys->i_codec_id != CODEC_ID_CINEPAK )
374 p_sys->p_context->palctrl = &p_sys->palette;
377 /* ***** init this codec with special data ***** */
378 ffmpeg_InitCodec( p_dec );
380 /* ***** Open the codec ***** */
381 if( ffmpeg_OpenCodec( p_dec ) < 0 )
383 msg_Err( p_dec, "cannot open codec (%s)", p_sys->psz_namecodec );
384 free( p_sys->p_buffer_orig );
392 /*****************************************************************************
393 * DecodeVideo: Called to decode one or more frames
394 *****************************************************************************/
395 picture_t *DecodeVideo( decoder_t *p_dec, block_t **pp_block )
397 decoder_sys_t *p_sys = p_dec->p_sys;
399 int b_null_size = false;
402 if( !pp_block || !*pp_block )
405 if( !p_sys->p_context->extradata_size && p_dec->fmt_in.i_extra )
407 ffmpeg_InitCodec( p_dec );
408 if( p_sys->b_delayed_open )
410 if( ffmpeg_OpenCodec( p_dec ) )
411 msg_Err( p_dec, "cannot open codec (%s)", p_sys->psz_namecodec );
416 if( p_sys->b_delayed_open )
418 block_Release( p_block );
422 if( p_block->i_flags & (BLOCK_FLAG_DISCONTINUITY|BLOCK_FLAG_CORRUPTED) )
425 p_sys->i_pts = 0; /* To make sure we recover properly */
427 p_sys->input_pts = p_sys->input_dts = 0;
428 p_sys->i_late_frames = 0;
430 block_Release( p_block );
432 //if( p_block->i_flags & BLOCK_FLAG_CORRUPTED )
433 //avcodec_flush_buffers( p_sys->p_context );
437 if( p_block->i_flags & BLOCK_FLAG_PREROLL )
439 /* Do not care about late frames when prerolling
440 * TODO avoid decoding of non reference frame
441 * (ie all B except for H264 where it depends only on nal_ref_idc) */
442 p_sys->i_late_frames = 0;
445 if( !p_dec->b_pace_control && (p_sys->i_late_frames > 0) &&
446 (mdate() - p_sys->i_late_frames_start > INT64_C(5000000)) )
450 msg_Err( p_dec, "more than 5 seconds of late video -> "
451 "dropping frame (computer too slow ?)" );
452 p_sys->i_pts = 0; /* To make sure we recover properly */
454 block_Release( p_block );
455 p_sys->i_late_frames--;
459 if( p_block->i_pts > 0 || p_block->i_dts > 0 )
461 p_sys->input_pts = p_block->i_pts;
462 p_sys->input_dts = p_block->i_dts;
464 /* Make sure we don't reuse the same timestamps twice */
465 p_block->i_pts = p_block->i_dts = 0;
468 /* A good idea could be to decode all I pictures and see for the other */
469 if( !p_dec->b_pace_control &&
471 (p_sys->i_late_frames > 4) )
474 if( p_sys->i_late_frames < 12 )
476 p_sys->p_context->skip_frame =
477 (p_sys->i_skip_frame <= AVDISCARD_BIDIR) ?
478 AVDISCARD_BIDIR : p_sys->i_skip_frame;
482 /* picture too late, won't decode
483 * but break picture until a new I, and for mpeg4 ...*/
484 p_sys->i_late_frames--; /* needed else it will never be decrease */
485 block_Release( p_block );
492 if( p_sys->b_hurry_up )
493 p_sys->p_context->skip_frame = p_sys->i_skip_frame;
494 if( !(p_block->i_flags & BLOCK_FLAG_PREROLL) )
500 if( p_sys->p_context->width <= 0 || p_sys->p_context->height <= 0 )
502 if( p_sys->b_hurry_up )
503 p_sys->p_context->skip_frame = p_sys->i_skip_frame;
506 else if( !b_drawpicture )
508 /* It creates broken picture
509 * FIXME either our parser or ffmpeg is broken */
511 if( p_sys->b_hurry_up )
512 p_sys->p_context->skip_frame = __MAX( p_sys->p_context->skip_frame,
518 * Do the actual decoding now
521 /* Don't forget that ffmpeg requires a little more bytes
522 * that the real frame size */
523 if( p_block->i_buffer > 0 )
525 p_sys->b_flush = ( p_block->i_flags & BLOCK_FLAG_END_OF_SEQUENCE ) != 0;
527 p_sys->i_buffer = p_block->i_buffer;
528 if( p_sys->i_buffer + FF_INPUT_BUFFER_PADDING_SIZE >
529 p_sys->i_buffer_orig )
531 free( p_sys->p_buffer_orig );
532 p_sys->i_buffer_orig =
533 p_block->i_buffer + FF_INPUT_BUFFER_PADDING_SIZE;
534 p_sys->p_buffer_orig = malloc( p_sys->i_buffer_orig );
536 p_sys->p_buffer = p_sys->p_buffer_orig;
537 p_sys->i_buffer = p_block->i_buffer;
538 if( !p_sys->p_buffer )
540 block_Release( p_block );
543 vlc_memcpy( p_sys->p_buffer, p_block->p_buffer, p_block->i_buffer );
544 memset( p_sys->p_buffer + p_block->i_buffer, 0,
545 FF_INPUT_BUFFER_PADDING_SIZE );
547 p_block->i_buffer = 0;
550 while( p_sys->i_buffer > 0 || p_sys->b_flush )
552 int i_used, b_gotpicture;
555 i_used = avcodec_decode_video( p_sys->p_context, p_sys->p_ff_pic,
557 p_sys->i_buffer <= 0 && p_sys->b_flush ? NULL : (uint8_t*)p_sys->p_buffer, p_sys->i_buffer );
559 if( b_null_size && p_sys->p_context->width > 0 &&
560 p_sys->p_context->height > 0 &&
563 /* Reparse it to not drop the I frame */
565 if( p_sys->b_hurry_up )
566 p_sys->p_context->skip_frame = p_sys->i_skip_frame;
567 i_used = avcodec_decode_video( p_sys->p_context, p_sys->p_ff_pic,
569 (uint8_t*)p_sys->p_buffer, p_sys->i_buffer );
573 p_sys->b_first_frame = true;
575 if( p_sys->i_buffer <= 0 )
576 p_sys->b_flush = false;
581 msg_Warn( p_dec, "cannot decode one frame (%d bytes)",
583 block_Release( p_block );
586 else if( i_used > p_sys->i_buffer )
588 i_used = p_sys->i_buffer;
592 p_sys->i_buffer -= i_used;
593 p_sys->p_buffer += i_used;
595 /* Nothing to display */
598 if( i_used == 0 ) break;
603 if( p_sys->p_ff_pic->pts )
604 p_sys->i_pts = p_sys->p_ff_pic->pts;
606 /* Update frame late count (except when doing preroll) */
607 mtime_t i_display_date = 0;
608 if( !(p_block->i_flags & BLOCK_FLAG_PREROLL) )
609 i_display_date = decoder_GetDisplayDate( p_dec, p_sys->i_pts );
611 if( i_display_date > 0 && i_display_date <= mdate() )
613 p_sys->i_late_frames++;
614 if( p_sys->i_late_frames == 1 )
615 p_sys->i_late_frames_start = mdate();
619 p_sys->i_late_frames = 0;
622 if( !b_drawpicture || !p_sys->p_ff_pic->linesize[0] )
624 /* Do not display the picture */
625 p_pic = (picture_t *)p_sys->p_ff_pic->opaque;
626 if( !b_drawpicture && p_pic )
627 decoder_DeletePicture( p_dec, p_pic );
629 ffmpeg_NextPts( p_dec );
633 if( !p_sys->p_ff_pic->opaque )
635 /* Get a new picture */
636 p_pic = ffmpeg_NewPictBuf( p_dec, p_sys->p_context );
639 block_Release( p_block );
643 /* Fill p_picture_t from AVVideoFrame and do chroma conversion
645 ffmpeg_CopyPicture( p_dec, p_pic, p_sys->p_ff_pic );
649 p_pic = (picture_t *)p_sys->p_ff_pic->opaque;
652 /* Sanity check (seems to be needed for some streams) */
653 if( p_sys->p_ff_pic->pict_type == FF_B_TYPE )
655 p_sys->b_has_b_frames = true;
658 if( !p_dec->fmt_in.video.i_aspect )
660 /* Fetch again the aspect ratio in case it changed */
661 p_dec->fmt_out.video.i_aspect =
663 * ( av_q2d(p_sys->p_context->sample_aspect_ratio)
664 * p_sys->p_context->width / p_sys->p_context->height );
665 p_dec->fmt_out.video.i_sar_num
666 = p_sys->p_context->sample_aspect_ratio.num;
667 p_dec->fmt_out.video.i_sar_den
668 = p_sys->p_context->sample_aspect_ratio.den;
670 if( p_dec->fmt_out.video.i_aspect == 0 )
672 p_dec->fmt_out.video.i_aspect = VOUT_ASPECT_FACTOR
673 * p_sys->p_context->width / p_sys->p_context->height;
677 /* Send decoded frame to vout */
680 p_pic->date = p_sys->i_pts;
682 ffmpeg_NextPts( p_dec );
684 if( p_sys->b_first_frame )
686 /* Hack to force display of still pictures */
687 p_sys->b_first_frame = false;
688 p_pic->b_force = true;
691 p_pic->i_nb_fields = 2 + p_sys->p_ff_pic->repeat_pict;
692 p_pic->b_progressive = !p_sys->p_ff_pic->interlaced_frame;
693 p_pic->b_top_field_first = p_sys->p_ff_pic->top_field_first;
695 p_pic->i_qstride = p_sys->p_ff_pic->qstride;
696 int i_mb_h = ( p_pic->format.i_height + 15 ) / 16;
697 p_pic->p_q = malloc( p_pic->i_qstride * i_mb_h );
698 memcpy( p_pic->p_q, p_sys->p_ff_pic->qscale_table,
699 p_pic->i_qstride * i_mb_h );
700 switch( p_sys->p_ff_pic->qscale_type )
702 case FF_QSCALE_TYPE_MPEG1:
703 p_pic->i_qtype = QTYPE_MPEG1;
705 case FF_QSCALE_TYPE_MPEG2:
706 p_pic->i_qtype = QTYPE_MPEG2;
708 case FF_QSCALE_TYPE_H264:
709 p_pic->i_qtype = QTYPE_H264;
717 decoder_DeletePicture( p_dec, p_pic );
721 block_Release( p_block );
725 /*****************************************************************************
726 * EndVideo: decoder destruction
727 *****************************************************************************
728 * This function is called when the thread ends after a successful
730 *****************************************************************************/
731 void EndVideoDec( decoder_t *p_dec )
733 decoder_sys_t *p_sys = p_dec->p_sys;
735 if( p_sys->p_ff_pic ) av_free( p_sys->p_ff_pic );
736 free( p_sys->p_buffer_orig );
739 /*****************************************************************************
740 * ffmpeg_InitCodec: setup codec extra initialization data for ffmpeg
741 *****************************************************************************/
742 static void ffmpeg_InitCodec( decoder_t *p_dec )
744 decoder_sys_t *p_sys = p_dec->p_sys;
745 int i_size = p_dec->fmt_in.i_extra;
747 if( !i_size ) return;
749 if( p_sys->i_codec_id == CODEC_ID_SVQ3 )
753 p_sys->p_context->extradata_size = i_size + 12;
754 p = p_sys->p_context->extradata =
755 malloc( p_sys->p_context->extradata_size );
759 memcpy( &p[0], "SVQ3", 4 );
760 memset( &p[4], 0, 8 );
761 memcpy( &p[12], p_dec->fmt_in.p_extra, i_size );
763 /* Now remove all atoms before the SMI one */
764 if( p_sys->p_context->extradata_size > 0x5a &&
765 strncmp( (char*)&p[0x56], "SMI ", 4 ) )
767 uint8_t *psz = &p[0x52];
769 while( psz < &p[p_sys->p_context->extradata_size - 8] )
771 int i_size = GetDWBE( psz );
774 /* FIXME handle 1 as long size */
777 if( !strncmp( (char*)&psz[4], "SMI ", 4 ) )
779 memmove( &p[0x52], psz,
780 &p[p_sys->p_context->extradata_size] - psz );
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 /*****************************************************************************
805 *****************************************************************************/
806 static int ffmpeg_OpenCodec( decoder_t *p_dec )
808 decoder_sys_t *p_sys = p_dec->p_sys;
810 if( p_sys->p_context->extradata_size <= 0 )
812 if( p_sys->i_codec_id == CODEC_ID_VC1 ||
813 p_sys->i_codec_id == CODEC_ID_VORBIS ||
814 p_sys->i_codec_id == CODEC_ID_THEORA )
816 msg_Warn( p_dec, "waiting for extra data for codec %s",
817 p_sys->psz_namecodec );
821 p_sys->p_context->width = p_dec->fmt_in.video.i_width;
822 p_sys->p_context->height = p_dec->fmt_in.video.i_height;
823 #if LIBAVCODEC_VERSION_INT < ((52<<16)+(0<<8)+0)
824 p_sys->p_context->bits_per_sample = p_dec->fmt_in.video.i_bits_per_pixel;
826 p_sys->p_context->bits_per_coded_sample = p_dec->fmt_in.video.i_bits_per_pixel;
831 ret = avcodec_open( p_sys->p_context, p_sys->p_codec );
832 vlc_avcodec_unlock();
835 msg_Dbg( p_dec, "ffmpeg codec (%s) started", p_sys->psz_namecodec );
837 p_sys->b_delayed_open = false;
841 /*****************************************************************************
842 * ffmpeg_CopyPicture: copy a picture from ffmpeg internal buffers to a
843 * picture_t structure (when not in direct rendering mode).
844 *****************************************************************************/
845 static void ffmpeg_CopyPicture( decoder_t *p_dec,
846 picture_t *p_pic, AVFrame *p_ff_pic )
848 decoder_sys_t *p_sys = p_dec->p_sys;
850 if( TestFfmpegChroma( p_sys->p_context->pix_fmt, -1 ) == VLC_SUCCESS )
852 int i_plane, i_size, i_line;
853 uint8_t *p_dst, *p_src;
854 int i_src_stride, i_dst_stride;
856 for( i_plane = 0; i_plane < p_pic->i_planes; i_plane++ )
858 p_src = p_ff_pic->data[i_plane];
859 p_dst = p_pic->p[i_plane].p_pixels;
860 i_src_stride = p_ff_pic->linesize[i_plane];
861 i_dst_stride = p_pic->p[i_plane].i_pitch;
863 i_size = __MIN( i_src_stride, i_dst_stride );
864 for( i_line = 0; i_line < p_pic->p[i_plane].i_visible_lines;
867 vlc_memcpy( p_dst, p_src, i_size );
868 p_src += i_src_stride;
869 p_dst += i_dst_stride;
875 msg_Err( p_dec, "don't know how to convert chroma %i",
876 p_sys->p_context->pix_fmt );
881 /*****************************************************************************
882 * ffmpeg_GetFrameBuf: callback used by ffmpeg to get a frame buffer.
883 *****************************************************************************
884 * It is used for direct rendering as well as to get the right PTS for each
885 * decoded picture (even in indirect rendering mode).
886 *****************************************************************************/
887 static void ffmpeg_SetFrameBufferPts( decoder_t *p_dec, AVFrame *p_ff_pic );
889 static int ffmpeg_GetFrameBuf( struct AVCodecContext *p_context,
892 decoder_t *p_dec = (decoder_t *)p_context->opaque;
893 decoder_sys_t *p_sys = p_dec->p_sys;
896 /* Set picture PTS */
897 ffmpeg_SetFrameBufferPts( p_dec, p_ff_pic );
900 p_ff_pic->opaque = 0;
902 /* Not much to do in indirect rendering mode */
903 if( !p_sys->b_direct_rendering )
905 return avcodec_default_get_buffer( p_context, p_ff_pic );
908 /* Some codecs set pix_fmt only after the 1st frame has been decoded,
909 * so we need to check for direct rendering again. */
911 int i_width = p_sys->p_context->width;
912 int i_height = p_sys->p_context->height;
913 avcodec_align_dimensions( p_sys->p_context, &i_width, &i_height );
915 if( GetVlcChroma( &p_dec->fmt_out.video, p_context->pix_fmt ) != VLC_SUCCESS ||
916 p_sys->p_context->width % 16 || p_sys->p_context->height % 16 ||
917 /* We only pad picture up to 16 */
918 PAD(p_sys->p_context->width,16) < i_width || PAD(p_sys->p_context->height,16) < i_height ||
919 p_context->pix_fmt == PIX_FMT_PAL8 )
921 msg_Dbg( p_dec, "disabling direct rendering" );
922 p_sys->b_direct_rendering = false;
923 return avcodec_default_get_buffer( p_context, p_ff_pic );
925 p_dec->fmt_out.i_codec = p_dec->fmt_out.video.i_chroma;
927 /* Get a new picture */
928 //p_sys->p_vout->render.b_allow_modify_pics = 0;
929 p_pic = ffmpeg_NewPictBuf( p_dec, p_sys->p_context );
932 p_sys->b_direct_rendering = false;
933 return avcodec_default_get_buffer( p_context, p_ff_pic );
935 p_sys->p_context->draw_horiz_band = NULL;
937 p_ff_pic->opaque = (void*)p_pic;
938 p_ff_pic->type = FF_BUFFER_TYPE_USER;
939 p_ff_pic->data[0] = p_pic->p[0].p_pixels;
940 p_ff_pic->data[1] = p_pic->p[1].p_pixels;
941 p_ff_pic->data[2] = p_pic->p[2].p_pixels;
942 p_ff_pic->data[3] = NULL; /* alpha channel but I'm not sure */
944 p_ff_pic->linesize[0] = p_pic->p[0].i_pitch;
945 p_ff_pic->linesize[1] = p_pic->p[1].i_pitch;
946 p_ff_pic->linesize[2] = p_pic->p[2].i_pitch;
947 p_ff_pic->linesize[3] = 0;
949 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;
1014 if( !p_ff_pic->opaque )
1016 avcodec_default_release_buffer( p_context, p_ff_pic );
1020 picture_t *p_pic = (picture_t*)p_ff_pic->opaque;
1021 decoder_UnlinkPicture( p_dec, p_pic );
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;
1029 static void ffmpeg_NextPts( decoder_t *p_dec )
1031 decoder_sys_t *p_sys = p_dec->p_sys;
1033 if( p_sys->i_pts <= 0 )
1036 /* interpolate the next PTS */
1037 if( p_dec->fmt_in.video.i_frame_rate > 0 &&
1038 p_dec->fmt_in.video.i_frame_rate_base > 0 )
1040 p_sys->i_pts += INT64_C(1000000) *
1041 (2 + p_sys->p_ff_pic->repeat_pict) *
1042 p_dec->fmt_in.video.i_frame_rate_base /
1043 (2 * p_dec->fmt_in.video.i_frame_rate);
1045 else if( p_sys->p_context->time_base.den > 0 )
1047 p_sys->i_pts += INT64_C(1000000) *
1048 (2 + p_sys->p_ff_pic->repeat_pict) *
1049 p_sys->p_context->time_base.num /
1050 (2 * p_sys->p_context->time_base.den);