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 !p_sys->p_context->debug_mv )
297 /* Some codecs set pix_fmt only after the 1st frame has been decoded,
298 * so we need to do another check in ffmpeg_GetFrameBuf() */
299 p_sys->b_direct_rendering = true;
302 /* ffmpeg doesn't properly release old pictures when frames are skipped */
303 //if( p_sys->b_hurry_up ) p_sys->b_direct_rendering = false;
304 if( p_sys->b_direct_rendering )
306 msg_Dbg( p_dec, "using direct rendering" );
307 p_sys->p_context->flags |= CODEC_FLAG_EMU_EDGE;
310 /* Always use our get_buffer wrapper so we can calculate the
312 p_sys->p_context->get_buffer = ffmpeg_GetFrameBuf;
313 p_sys->p_context->reget_buffer = ffmpeg_ReGetFrameBuf;
314 p_sys->p_context->release_buffer = ffmpeg_ReleaseFrameBuf;
315 p_sys->p_context->opaque = p_dec;
317 /* ***** misc init ***** */
318 p_sys->input_pts = p_sys->input_dts = 0;
320 p_sys->b_has_b_frames = false;
321 p_sys->b_first_frame = true;
322 p_sys->b_flush = false;
323 p_sys->i_late_frames = 0;
325 p_sys->i_buffer_orig = 1;
326 p_sys->p_buffer_orig = p_sys->p_buffer = malloc( p_sys->i_buffer_orig );
327 if( !p_sys->p_buffer_orig )
333 /* Set output properties */
334 p_dec->fmt_out.i_cat = VIDEO_ES;
335 if( GetVlcChroma( &p_dec->fmt_out.video, p_context->pix_fmt ) != VLC_SUCCESS )
337 /* we are doomed. but not really, because most codecs set their pix_fmt later on */
338 p_dec->fmt_out.i_codec = VLC_FOURCC('I','4','2','0');
340 p_dec->fmt_out.i_codec = p_dec->fmt_out.video.i_chroma;
343 memset( &p_sys->palette, 0, sizeof(p_sys->palette) );
344 if( p_dec->fmt_in.video.p_palette )
346 p_sys->palette.palette_changed = 1;
348 for( int i = 0; i < __MIN( AVPALETTE_COUNT, p_dec->fmt_in.video.p_palette->i_entries ); i++ )
354 c.a[0] = p_dec->fmt_in.video.p_palette->palette[i][0];
355 c.a[1] = p_dec->fmt_in.video.p_palette->palette[i][1];
356 c.a[2] = p_dec->fmt_in.video.p_palette->palette[i][2];
357 c.a[3] = p_dec->fmt_in.video.p_palette->palette[i][3];
359 p_sys->palette.palette[i] = c.u;
361 p_sys->p_context->palctrl = &p_sys->palette;
363 p_dec->fmt_out.video.p_palette = malloc( sizeof(video_palette_t) );
364 if( p_dec->fmt_out.video.p_palette )
365 *p_dec->fmt_out.video.p_palette = *p_dec->fmt_in.video.p_palette;
367 else if( p_sys->i_codec_id != CODEC_ID_MSVIDEO1 && p_sys->i_codec_id != CODEC_ID_CINEPAK )
369 p_sys->p_context->palctrl = &p_sys->palette;
372 /* ***** init this codec with special data ***** */
373 ffmpeg_InitCodec( p_dec );
375 /* ***** Open the codec ***** */
376 if( ffmpeg_OpenCodec( p_dec ) < 0 )
378 msg_Err( p_dec, "cannot open codec (%s)", p_sys->psz_namecodec );
379 free( p_sys->p_buffer_orig );
387 /*****************************************************************************
388 * DecodeVideo: Called to decode one or more frames
389 *****************************************************************************/
390 picture_t *DecodeVideo( decoder_t *p_dec, block_t **pp_block )
392 decoder_sys_t *p_sys = p_dec->p_sys;
394 int b_null_size = false;
397 if( !pp_block || !*pp_block )
400 if( !p_sys->p_context->extradata_size && p_dec->fmt_in.i_extra )
402 ffmpeg_InitCodec( p_dec );
403 if( p_sys->b_delayed_open )
405 if( ffmpeg_OpenCodec( p_dec ) )
406 msg_Err( p_dec, "cannot open codec (%s)", p_sys->psz_namecodec );
411 if( p_sys->b_delayed_open )
413 block_Release( p_block );
417 if( p_block->i_flags & (BLOCK_FLAG_DISCONTINUITY|BLOCK_FLAG_CORRUPTED) )
420 p_sys->i_pts = 0; /* To make sure we recover properly */
422 p_sys->input_pts = p_sys->input_dts = 0;
423 p_sys->i_late_frames = 0;
425 block_Release( p_block );
427 //if( p_block->i_flags & BLOCK_FLAG_CORRUPTED )
428 //avcodec_flush_buffers( p_sys->p_context );
432 if( p_block->i_flags & BLOCK_FLAG_PREROLL )
434 /* Do not care about late frames when prerolling
435 * TODO avoid decoding of non reference frame
436 * (ie all B except for H264 where it depends only on nal_ref_idc) */
437 p_sys->i_late_frames = 0;
440 if( !p_dec->b_pace_control && (p_sys->i_late_frames > 0) &&
441 (mdate() - p_sys->i_late_frames_start > INT64_C(5000000)) )
445 msg_Err( p_dec, "more than 5 seconds of late video -> "
446 "dropping frame (computer too slow ?)" );
447 p_sys->i_pts = 0; /* To make sure we recover properly */
449 block_Release( p_block );
450 p_sys->i_late_frames--;
454 if( p_block->i_pts > 0 || p_block->i_dts > 0 )
456 p_sys->input_pts = p_block->i_pts;
457 p_sys->input_dts = p_block->i_dts;
459 /* Make sure we don't reuse the same timestamps twice */
460 p_block->i_pts = p_block->i_dts = 0;
463 /* A good idea could be to decode all I pictures and see for the other */
464 if( !p_dec->b_pace_control &&
466 (p_sys->i_late_frames > 4) )
469 if( p_sys->i_late_frames < 12 )
471 p_sys->p_context->skip_frame =
472 (p_sys->i_skip_frame <= AVDISCARD_BIDIR) ?
473 AVDISCARD_BIDIR : p_sys->i_skip_frame;
477 /* picture too late, won't decode
478 * but break picture until a new I, and for mpeg4 ...*/
479 p_sys->i_late_frames--; /* needed else it will never be decrease */
480 block_Release( p_block );
487 if( p_sys->b_hurry_up )
488 p_sys->p_context->skip_frame = p_sys->i_skip_frame;
489 if( !(p_block->i_flags & BLOCK_FLAG_PREROLL) )
495 if( p_sys->p_context->width <= 0 || p_sys->p_context->height <= 0 )
497 if( p_sys->b_hurry_up )
498 p_sys->p_context->skip_frame = p_sys->i_skip_frame;
501 else if( !b_drawpicture )
503 p_sys->p_context->skip_frame = __MAX( p_sys->p_context->skip_frame,
508 * Do the actual decoding now
511 /* Don't forget that ffmpeg requires a little more bytes
512 * that the real frame size */
513 if( p_block->i_buffer > 0 )
515 p_sys->b_flush = ( p_block->i_flags & BLOCK_FLAG_END_OF_SEQUENCE ) != 0;
517 p_sys->i_buffer = p_block->i_buffer;
518 if( p_sys->i_buffer + FF_INPUT_BUFFER_PADDING_SIZE >
519 p_sys->i_buffer_orig )
521 free( p_sys->p_buffer_orig );
522 p_sys->i_buffer_orig =
523 p_block->i_buffer + FF_INPUT_BUFFER_PADDING_SIZE;
524 p_sys->p_buffer_orig = malloc( p_sys->i_buffer_orig );
526 p_sys->p_buffer = p_sys->p_buffer_orig;
527 p_sys->i_buffer = p_block->i_buffer;
528 if( !p_sys->p_buffer )
530 block_Release( p_block );
533 vlc_memcpy( p_sys->p_buffer, p_block->p_buffer, p_block->i_buffer );
534 memset( p_sys->p_buffer + p_block->i_buffer, 0,
535 FF_INPUT_BUFFER_PADDING_SIZE );
537 p_block->i_buffer = 0;
540 while( p_sys->i_buffer > 0 || p_sys->b_flush )
542 int i_used, b_gotpicture;
545 i_used = avcodec_decode_video( p_sys->p_context, p_sys->p_ff_pic,
547 p_sys->i_buffer <= 0 && p_sys->b_flush ? NULL : (uint8_t*)p_sys->p_buffer, p_sys->i_buffer );
549 if( b_null_size && p_sys->p_context->width > 0 &&
550 p_sys->p_context->height > 0 &&
553 /* Reparse it to not drop the I frame */
555 if( p_sys->b_hurry_up )
556 p_sys->p_context->skip_frame = p_sys->i_skip_frame;
557 i_used = avcodec_decode_video( p_sys->p_context, p_sys->p_ff_pic,
559 (uint8_t*)p_sys->p_buffer, p_sys->i_buffer );
563 p_sys->b_first_frame = true;
565 if( p_sys->i_buffer <= 0 )
566 p_sys->b_flush = false;
571 msg_Warn( p_dec, "cannot decode one frame (%d bytes)",
573 block_Release( p_block );
576 else if( i_used > p_sys->i_buffer )
578 i_used = p_sys->i_buffer;
582 p_sys->i_buffer -= i_used;
583 p_sys->p_buffer += i_used;
585 /* Nothing to display */
588 if( i_used == 0 ) break;
593 if( p_sys->p_ff_pic->pts )
594 p_sys->i_pts = p_sys->p_ff_pic->pts;
596 /* Update frame late count (except when doing preroll) */
597 mtime_t i_display_date = 0;
598 if( !(p_block->i_flags & BLOCK_FLAG_PREROLL) )
599 i_display_date = decoder_GetDisplayDate( p_dec, p_sys->i_pts );
601 if( i_display_date > 0 && i_display_date <= mdate() )
603 p_sys->i_late_frames++;
604 if( p_sys->i_late_frames == 1 )
605 p_sys->i_late_frames_start = mdate();
609 p_sys->i_late_frames = 0;
612 if( !b_drawpicture || !p_sys->p_ff_pic->linesize[0] )
614 /* Do not display the picture */
615 p_pic = (picture_t *)p_sys->p_ff_pic->opaque;
616 if( !b_drawpicture && p_pic )
617 decoder_DeletePicture( p_dec, p_pic );
619 ffmpeg_NextPts( p_dec );
623 if( !p_sys->p_ff_pic->opaque )
625 /* Get a new picture */
626 p_pic = ffmpeg_NewPictBuf( p_dec, p_sys->p_context );
629 block_Release( p_block );
633 /* Fill p_picture_t from AVVideoFrame and do chroma conversion
635 ffmpeg_CopyPicture( p_dec, p_pic, p_sys->p_ff_pic );
639 p_pic = (picture_t *)p_sys->p_ff_pic->opaque;
642 /* Sanity check (seems to be needed for some streams) */
643 if( p_sys->p_ff_pic->pict_type == FF_B_TYPE )
645 p_sys->b_has_b_frames = true;
648 if( !p_dec->fmt_in.video.i_aspect )
650 /* Fetch again the aspect ratio in case it changed */
651 p_dec->fmt_out.video.i_aspect =
653 * ( av_q2d(p_sys->p_context->sample_aspect_ratio)
654 * p_sys->p_context->width / p_sys->p_context->height );
655 p_dec->fmt_out.video.i_sar_num
656 = p_sys->p_context->sample_aspect_ratio.num;
657 p_dec->fmt_out.video.i_sar_den
658 = p_sys->p_context->sample_aspect_ratio.den;
660 if( p_dec->fmt_out.video.i_aspect == 0 )
662 p_dec->fmt_out.video.i_aspect = VOUT_ASPECT_FACTOR
663 * p_sys->p_context->width / p_sys->p_context->height;
667 /* Send decoded frame to vout */
670 p_pic->date = p_sys->i_pts;
672 ffmpeg_NextPts( p_dec );
674 if( p_sys->b_first_frame )
676 /* Hack to force display of still pictures */
677 p_sys->b_first_frame = false;
678 p_pic->b_force = true;
681 p_pic->i_nb_fields = 2 + p_sys->p_ff_pic->repeat_pict;
682 p_pic->b_progressive = !p_sys->p_ff_pic->interlaced_frame;
683 p_pic->b_top_field_first = p_sys->p_ff_pic->top_field_first;
685 p_pic->i_qstride = p_sys->p_ff_pic->qstride;
686 int i_mb_h = ( p_pic->format.i_height + 15 ) / 16;
687 p_pic->p_q = malloc( p_pic->i_qstride * i_mb_h );
688 memcpy( p_pic->p_q, p_sys->p_ff_pic->qscale_table,
689 p_pic->i_qstride * i_mb_h );
690 switch( p_sys->p_ff_pic->qscale_type )
692 case FF_QSCALE_TYPE_MPEG1:
693 p_pic->i_qtype = QTYPE_MPEG1;
695 case FF_QSCALE_TYPE_MPEG2:
696 p_pic->i_qtype = QTYPE_MPEG2;
698 case FF_QSCALE_TYPE_H264:
699 p_pic->i_qtype = QTYPE_H264;
707 decoder_DeletePicture( p_dec, p_pic );
711 block_Release( p_block );
715 /*****************************************************************************
716 * EndVideo: decoder destruction
717 *****************************************************************************
718 * This function is called when the thread ends after a successful
720 *****************************************************************************/
721 void EndVideoDec( decoder_t *p_dec )
723 decoder_sys_t *p_sys = p_dec->p_sys;
725 if( p_sys->p_ff_pic ) av_free( p_sys->p_ff_pic );
726 free( p_sys->p_buffer_orig );
729 /*****************************************************************************
730 * ffmpeg_InitCodec: setup codec extra initialization data for ffmpeg
731 *****************************************************************************/
732 static void ffmpeg_InitCodec( decoder_t *p_dec )
734 decoder_sys_t *p_sys = p_dec->p_sys;
735 int i_size = p_dec->fmt_in.i_extra;
737 if( !i_size ) return;
739 if( p_sys->i_codec_id == CODEC_ID_SVQ3 )
743 p_sys->p_context->extradata_size = i_size + 12;
744 p = p_sys->p_context->extradata =
745 malloc( p_sys->p_context->extradata_size );
749 memcpy( &p[0], "SVQ3", 4 );
750 memset( &p[4], 0, 8 );
751 memcpy( &p[12], p_dec->fmt_in.p_extra, i_size );
753 /* Now remove all atoms before the SMI one */
754 if( p_sys->p_context->extradata_size > 0x5a &&
755 strncmp( (char*)&p[0x56], "SMI ", 4 ) )
757 uint8_t *psz = &p[0x52];
759 while( psz < &p[p_sys->p_context->extradata_size - 8] )
761 int i_size = GetDWBE( psz );
764 /* FIXME handle 1 as long size */
767 if( !strncmp( (char*)&psz[4], "SMI ", 4 ) )
769 memmove( &p[0x52], psz,
770 &p[p_sys->p_context->extradata_size] - psz );
780 p_sys->p_context->extradata_size = i_size;
781 p_sys->p_context->extradata =
782 malloc( i_size + FF_INPUT_BUFFER_PADDING_SIZE );
783 if( p_sys->p_context->extradata )
785 memcpy( p_sys->p_context->extradata,
786 p_dec->fmt_in.p_extra, i_size );
787 memset( &((uint8_t*)p_sys->p_context->extradata)[i_size],
788 0, FF_INPUT_BUFFER_PADDING_SIZE );
793 /*****************************************************************************
795 *****************************************************************************/
796 static int ffmpeg_OpenCodec( decoder_t *p_dec )
798 decoder_sys_t *p_sys = p_dec->p_sys;
800 if( p_sys->p_context->extradata_size <= 0 )
802 if( p_sys->i_codec_id == CODEC_ID_VC1 ||
803 p_sys->i_codec_id == CODEC_ID_VORBIS ||
804 p_sys->i_codec_id == CODEC_ID_THEORA )
806 msg_Warn( p_dec, "waiting for extra data for codec %s",
807 p_sys->psz_namecodec );
811 p_sys->p_context->width = p_dec->fmt_in.video.i_width;
812 p_sys->p_context->height = p_dec->fmt_in.video.i_height;
813 #if LIBAVCODEC_VERSION_INT < ((52<<16)+(0<<8)+0)
814 p_sys->p_context->bits_per_sample = p_dec->fmt_in.video.i_bits_per_pixel;
816 p_sys->p_context->bits_per_coded_sample = p_dec->fmt_in.video.i_bits_per_pixel;
821 ret = avcodec_open( p_sys->p_context, p_sys->p_codec );
822 vlc_avcodec_unlock();
825 msg_Dbg( p_dec, "ffmpeg codec (%s) started", p_sys->psz_namecodec );
827 p_sys->b_delayed_open = false;
831 /*****************************************************************************
832 * ffmpeg_CopyPicture: copy a picture from ffmpeg internal buffers to a
833 * picture_t structure (when not in direct rendering mode).
834 *****************************************************************************/
835 static void ffmpeg_CopyPicture( decoder_t *p_dec,
836 picture_t *p_pic, AVFrame *p_ff_pic )
838 decoder_sys_t *p_sys = p_dec->p_sys;
840 if( TestFfmpegChroma( p_sys->p_context->pix_fmt, -1 ) == VLC_SUCCESS )
842 int i_plane, i_size, i_line;
843 uint8_t *p_dst, *p_src;
844 int i_src_stride, i_dst_stride;
846 for( i_plane = 0; i_plane < p_pic->i_planes; i_plane++ )
848 p_src = p_ff_pic->data[i_plane];
849 p_dst = p_pic->p[i_plane].p_pixels;
850 i_src_stride = p_ff_pic->linesize[i_plane];
851 i_dst_stride = p_pic->p[i_plane].i_pitch;
853 i_size = __MIN( i_src_stride, i_dst_stride );
854 for( i_line = 0; i_line < p_pic->p[i_plane].i_visible_lines;
857 vlc_memcpy( p_dst, p_src, i_size );
858 p_src += i_src_stride;
859 p_dst += i_dst_stride;
865 msg_Err( p_dec, "don't know how to convert chroma %i",
866 p_sys->p_context->pix_fmt );
871 /*****************************************************************************
872 * ffmpeg_GetFrameBuf: callback used by ffmpeg to get a frame buffer.
873 *****************************************************************************
874 * It is used for direct rendering as well as to get the right PTS for each
875 * decoded picture (even in indirect rendering mode).
876 *****************************************************************************/
877 static void ffmpeg_SetFrameBufferPts( decoder_t *p_dec, AVFrame *p_ff_pic );
879 static int ffmpeg_GetFrameBuf( struct AVCodecContext *p_context,
882 decoder_t *p_dec = (decoder_t *)p_context->opaque;
883 decoder_sys_t *p_sys = p_dec->p_sys;
886 /* Set picture PTS */
887 ffmpeg_SetFrameBufferPts( p_dec, p_ff_pic );
890 p_ff_pic->opaque = 0;
892 /* Not much to do in indirect rendering mode */
893 if( !p_sys->b_direct_rendering )
895 return avcodec_default_get_buffer( p_context, p_ff_pic );
898 /* Some codecs set pix_fmt only after the 1st frame has been decoded,
899 * so we need to check for direct rendering again. */
901 int i_width = p_sys->p_context->width;
902 int i_height = p_sys->p_context->height;
903 avcodec_align_dimensions( p_sys->p_context, &i_width, &i_height );
905 if( GetVlcChroma( &p_dec->fmt_out.video, p_context->pix_fmt ) != VLC_SUCCESS ||
906 p_sys->p_context->width % 16 || p_sys->p_context->height % 16 ||
907 /* We only pad picture up to 16 */
908 PAD(p_sys->p_context->width,16) < i_width || PAD(p_sys->p_context->height,16) < i_height ||
909 p_context->pix_fmt == PIX_FMT_PAL8 )
911 msg_Dbg( p_dec, "disabling direct rendering" );
912 p_sys->b_direct_rendering = false;
913 return avcodec_default_get_buffer( p_context, p_ff_pic );
915 p_dec->fmt_out.i_codec = p_dec->fmt_out.video.i_chroma;
917 /* Get a new picture */
918 //p_sys->p_vout->render.b_allow_modify_pics = 0;
919 p_pic = ffmpeg_NewPictBuf( p_dec, p_sys->p_context );
922 p_sys->b_direct_rendering = false;
923 return avcodec_default_get_buffer( p_context, p_ff_pic );
925 p_sys->p_context->draw_horiz_band = NULL;
927 p_ff_pic->opaque = (void*)p_pic;
928 p_ff_pic->type = FF_BUFFER_TYPE_USER;
929 p_ff_pic->data[0] = p_pic->p[0].p_pixels;
930 p_ff_pic->data[1] = p_pic->p[1].p_pixels;
931 p_ff_pic->data[2] = p_pic->p[2].p_pixels;
932 p_ff_pic->data[3] = NULL; /* alpha channel but I'm not sure */
934 p_ff_pic->linesize[0] = p_pic->p[0].i_pitch;
935 p_ff_pic->linesize[1] = p_pic->p[1].i_pitch;
936 p_ff_pic->linesize[2] = p_pic->p[2].i_pitch;
937 p_ff_pic->linesize[3] = 0;
939 if( p_ff_pic->reference != 0 )
941 decoder_LinkPicture( p_dec, p_pic );
944 /* FIXME what is that, should give good value */
945 p_ff_pic->age = 256*256*256*64; // FIXME FIXME from ffmpeg
949 static int ffmpeg_ReGetFrameBuf( struct AVCodecContext *p_context, AVFrame *p_ff_pic )
951 decoder_t *p_dec = (decoder_t *)p_context->opaque;
955 p_ff_pic->pts = AV_NOPTS_VALUE;
957 /* We always use default reget function, it works perfectly fine */
958 i_ret = avcodec_default_reget_buffer( p_context, p_ff_pic );
960 /* Set picture PTS if avcodec_default_reget_buffer didn't set it (through a
961 * ffmpeg_GetFrameBuf call) */
962 if( !i_ret && p_ff_pic->pts == AV_NOPTS_VALUE )
963 ffmpeg_SetFrameBufferPts( p_dec, p_ff_pic );
968 static void ffmpeg_SetFrameBufferPts( decoder_t *p_dec, AVFrame *p_ff_pic )
970 decoder_sys_t *p_sys = p_dec->p_sys;
972 /* Set picture PTS */
973 if( p_sys->input_pts )
975 p_ff_pic->pts = p_sys->input_pts;
977 else if( p_sys->input_dts )
979 /* Some demuxers only set the dts so let's try to find a useful
980 * timestamp from this */
981 if( !p_sys->p_context->has_b_frames || !p_sys->b_has_b_frames ||
982 !p_ff_pic->reference || !p_sys->i_pts )
984 p_ff_pic->pts = p_sys->input_dts;
996 if( p_sys->i_pts ) /* make sure 1st frame has a pts > 0 */
998 p_sys->input_pts = p_sys->input_dts = 0;
1002 static void ffmpeg_ReleaseFrameBuf( struct AVCodecContext *p_context,
1005 decoder_t *p_dec = (decoder_t *)p_context->opaque;
1008 if( !p_ff_pic->opaque )
1010 avcodec_default_release_buffer( p_context, p_ff_pic );
1014 p_pic = (picture_t*)p_ff_pic->opaque;
1016 p_ff_pic->data[0] = NULL;
1017 p_ff_pic->data[1] = NULL;
1018 p_ff_pic->data[2] = NULL;
1019 p_ff_pic->data[3] = NULL;
1021 if( p_ff_pic->reference != 0 )
1023 decoder_UnlinkPicture( p_dec, p_pic );
1027 static void ffmpeg_NextPts( decoder_t *p_dec )
1029 decoder_sys_t *p_sys = p_dec->p_sys;
1031 if( p_sys->i_pts <= 0 )
1034 /* interpolate the next PTS */
1035 if( p_dec->fmt_in.video.i_frame_rate > 0 &&
1036 p_dec->fmt_in.video.i_frame_rate_base > 0 )
1038 p_sys->i_pts += INT64_C(1000000) *
1039 (2 + p_sys->p_ff_pic->repeat_pict) *
1040 p_dec->fmt_in.video.i_frame_rate_base /
1041 (2 * p_dec->fmt_in.video.i_frame_rate);
1043 else if( p_sys->p_context->time_base.den > 0 )
1045 p_sys->i_pts += INT64_C(1000000) *
1046 (2 + p_sys->p_ff_pic->repeat_pict) *
1047 p_sys->p_context->time_base.num /
1048 (2 * p_sys->p_context->time_base.den);