1 /*****************************************************************************
2 * video.c: video decoder using the ffmpeg library
3 *****************************************************************************
4 * Copyright (C) 1999-2001 VideoLAN
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., 59 Temple Place - Suite 330, Boston, MA 02111, USA.
23 *****************************************************************************/
25 /*****************************************************************************
27 *****************************************************************************/
29 #include <vlc/decoder.h>
32 #ifdef HAVE_FFMPEG_AVCODEC_H
33 # include <ffmpeg/avcodec.h>
40 /*****************************************************************************
41 * decoder_sys_t : decoder descriptor
42 *****************************************************************************/
45 /* Common part between video and audio decoder */
50 AVCodecContext *p_context;
53 /* Video decoder specific part */
59 BITMAPINFOHEADER *p_format;
61 /* for frame skipping algo */
65 /* how many decoded frames are late */
67 mtime_t i_late_frames_start;
69 /* for direct rendering */
70 int b_direct_rendering;
72 vlc_bool_t b_has_b_frames;
74 /* Hack to force display of still pictures */
75 vlc_bool_t b_first_frame;
77 int i_buffer_orig, i_buffer;
78 char *p_buffer_orig, *p_buffer;
80 /* Postprocessing handle */
83 vlc_bool_t b_pp_async;
87 /* FIXME (dummy palette for now) */
88 static AVPaletteControl palette_control;
90 /*****************************************************************************
92 *****************************************************************************/
93 static void ffmpeg_CopyPicture ( decoder_t *, picture_t *, AVFrame * );
94 static int ffmpeg_GetFrameBuf ( struct AVCodecContext *, AVFrame * );
95 static void ffmpeg_ReleaseFrameBuf( struct AVCodecContext *, AVFrame * );
97 static uint32_t ffmpeg_CodecTag( vlc_fourcc_t fcc )
99 uint8_t *p = (uint8_t*)&fcc;
100 return p[0] | (p[1] << 8) | (p[2] << 16) | (p[3] << 24);
103 /*****************************************************************************
105 *****************************************************************************/
106 static uint32_t ffmpeg_PixFmtToChroma( int i_ff_chroma )
108 switch( i_ff_chroma )
110 case PIX_FMT_YUV420P:
111 return VLC_FOURCC('I','4','2','0');
112 case PIX_FMT_YUV422P:
113 return VLC_FOURCC('I','4','2','2');
114 case PIX_FMT_YUV444P:
115 return VLC_FOURCC('I','4','4','4');
118 return VLC_FOURCC('Y','U','Y','2');
121 return VLC_FOURCC('R','V','1','5');
123 return VLC_FOURCC('R','V','1','6');
125 return VLC_FOURCC('R','V','2','4');
127 return VLC_FOURCC('R','V','3','2');
129 return VLC_FOURCC('G','R','E','Y');
131 case PIX_FMT_YUV410P:
132 case PIX_FMT_YUV411P:
139 /* Returns a new picture buffer */
140 static inline picture_t *ffmpeg_NewPictBuf( decoder_t *p_dec,
141 AVCodecContext *p_context )
143 decoder_sys_t *p_sys = p_dec->p_sys;
146 p_dec->fmt_out.video.i_width = p_context->width;
147 p_dec->fmt_out.video.i_height = p_context->height;
148 p_dec->fmt_out.i_codec = ffmpeg_PixFmtToChroma( p_context->pix_fmt );
150 if( !p_context->width || !p_context->height )
152 return NULL; /* invalid display size */
155 if( !p_dec->fmt_out.i_codec )
157 /* we make conversion if possible*/
158 p_dec->fmt_out.i_codec = VLC_FOURCC('I','4','2','0');
161 /* If an aspect-ratio was specified in the input format then force it */
162 if( p_dec->fmt_in.video.i_aspect )
164 p_dec->fmt_out.video.i_aspect = p_dec->fmt_in.video.i_aspect;
168 #if LIBAVCODEC_BUILD >= 4687
169 p_dec->fmt_out.video.i_aspect =
170 VOUT_ASPECT_FACTOR * ( av_q2d(p_context->sample_aspect_ratio) *
171 p_context->width / p_context->height );
173 p_dec->fmt_out.video.i_aspect =
174 VOUT_ASPECT_FACTOR * p_context->aspect_ratio;
176 if( p_dec->fmt_out.video.i_aspect == 0 )
178 p_dec->fmt_out.video.i_aspect =
179 VOUT_ASPECT_FACTOR * p_context->width / p_context->height;
183 if( p_context->frame_rate > 0 && p_context->frame_rate_base > 0 )
185 p_dec->fmt_out.video.i_frame_rate = p_context->frame_rate;
186 p_dec->fmt_out.video.i_frame_rate_base = p_context->frame_rate_base;
189 p_pic = p_dec->pf_vout_buffer_new( p_dec );
192 if( p_sys->p_pp && p_sys->b_pp && !p_sys->b_pp_init )
194 E_(InitPostproc)( p_dec, p_sys->p_pp, p_context->width,
195 p_context->height, p_context->pix_fmt );
196 p_sys->b_pp_init = VLC_TRUE;
203 /*****************************************************************************
204 * InitVideo: initialize the video decoder
205 *****************************************************************************
206 * the ffmpeg codec will be opened, some memory allocated. The vout is not yet
207 * opened (done after the first decoded frame).
208 *****************************************************************************/
209 int E_(InitVideoDec)( decoder_t *p_dec, AVCodecContext *p_context,
210 AVCodec *p_codec, int i_codec_id, char *psz_namecodec )
212 decoder_sys_t *p_sys;
216 var_Get( p_dec->p_libvlc, "avcodec", &lockval );
218 /* Allocate the memory needed to store the decoder's structure */
219 if( ( p_dec->p_sys = p_sys =
220 (decoder_sys_t *)malloc(sizeof(decoder_sys_t)) ) == NULL )
222 msg_Err( p_dec, "out of memory" );
226 p_dec->p_sys->p_context = p_context;
227 p_dec->p_sys->p_codec = p_codec;
228 p_dec->p_sys->i_codec_id = i_codec_id;
229 p_dec->p_sys->psz_namecodec = psz_namecodec;
230 p_sys->p_ff_pic = avcodec_alloc_frame();
232 /* ***** Fill p_context with init values ***** */
233 /* FIXME: remove when ffmpeg deals properly with avc1 */
234 if( p_dec->fmt_in.i_codec != VLC_FOURCC('a','v','c','1') )
236 p_sys->p_context->codec_tag = ffmpeg_CodecTag( p_dec->fmt_in.i_codec );
237 p_sys->p_context->width = p_dec->fmt_in.video.i_width;
238 p_sys->p_context->height = p_dec->fmt_in.video.i_height;
239 p_sys->p_context->bits_per_sample = p_dec->fmt_in.video.i_bits_per_pixel;
241 /* ***** Get configuration of ffmpeg plugin ***** */
242 p_sys->p_context->workaround_bugs =
243 config_GetInt( p_dec, "ffmpeg-workaround-bugs" );
244 p_sys->p_context->error_resilience =
245 config_GetInt( p_dec, "ffmpeg-error-resilience" );
247 var_Create( p_dec, "grayscale", VLC_VAR_BOOL | VLC_VAR_DOINHERIT );
248 var_Get( p_dec, "grayscale", &val );
249 if( val.b_bool ) p_sys->p_context->flags |= CODEC_FLAG_GRAY;
251 var_Create( p_dec, "ffmpeg-vismv", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT );
252 var_Get( p_dec, "ffmpeg-vismv", &val );
253 #if LIBAVCODEC_BUILD >= 4698
254 if( val.i_int ) p_sys->p_context->debug_mv = val.i_int;
257 var_Create( p_dec, "ffmpeg-lowres", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT );
258 var_Get( p_dec, "ffmpeg-lowres", &val );
259 #if LIBAVCODEC_BUILD >= 4723
260 if( val.i_int > 0 && val.i_int <= 2 ) p_sys->p_context->lowres = val.i_int;
263 /* ***** ffmpeg frame skipping ***** */
264 var_Create( p_dec, "ffmpeg-hurry-up", VLC_VAR_BOOL | VLC_VAR_DOINHERIT );
265 var_Get( p_dec, "ffmpeg-hurry-up", &val );
266 p_sys->b_hurry_up = val.b_bool;
268 /* ***** ffmpeg direct rendering ***** */
269 p_sys->b_direct_rendering = 0;
270 var_Create( p_dec, "ffmpeg-dr", VLC_VAR_BOOL | VLC_VAR_DOINHERIT );
271 var_Get( p_dec, "ffmpeg-dr", &val );
272 if( val.b_bool && (p_sys->p_codec->capabilities & CODEC_CAP_DR1) &&
273 ffmpeg_PixFmtToChroma( p_sys->p_context->pix_fmt ) &&
274 /* Apparently direct rendering doesn't work with YUV422P */
275 p_sys->p_context->pix_fmt != PIX_FMT_YUV422P &&
276 /* H264 uses too many reference frames */
277 p_sys->i_codec_id != CODEC_ID_H264 &&
278 !(p_sys->p_context->width % 16) && !(p_sys->p_context->height % 16) &&
279 #if LIBAVCODEC_BUILD >= 4698
280 !p_sys->p_context->debug_mv )
285 /* Some codecs set pix_fmt only after the 1st frame has been decoded,
286 * so we need to do another check in ffmpeg_GetFrameBuf() */
287 p_sys->b_direct_rendering = 1;
292 p_sys->b_pp = p_sys->b_pp_async = p_sys->b_pp_init = VLC_FALSE;
293 p_sys->p_pp = E_(OpenPostproc)( p_dec, &p_sys->b_pp_async );
296 /* ffmpeg doesn't properly release old pictures when frames are skipped */
297 //if( p_sys->b_hurry_up ) p_sys->b_direct_rendering = 0;
298 if( p_sys->b_direct_rendering )
300 msg_Dbg( p_dec, "using direct rendering" );
301 p_sys->p_context->flags |= CODEC_FLAG_EMU_EDGE;
304 /* Always use our get_buffer wrapper so we can calculate the
306 p_sys->p_context->get_buffer = ffmpeg_GetFrameBuf;
307 p_sys->p_context->release_buffer = ffmpeg_ReleaseFrameBuf;
308 p_sys->p_context->opaque = p_dec;
310 /* ***** init this codec with special data ***** */
311 if( p_dec->fmt_in.i_extra )
313 int i_size = p_dec->fmt_in.i_extra;
315 if( p_sys->i_codec_id == CODEC_ID_SVQ3 )
319 p_sys->p_context->extradata_size = i_size + 12;
320 p = p_sys->p_context->extradata =
321 malloc( p_sys->p_context->extradata_size );
323 memcpy( &p[0], "SVQ3", 4 );
324 memset( &p[4], 0, 8 );
325 memcpy( &p[12], p_dec->fmt_in.p_extra, i_size );
327 /* Now remove all atoms before the SMI one */
328 if( p_sys->p_context->extradata_size > 0x5a &&
329 strncmp( &p[0x56], "SMI ", 4 ) )
331 uint8_t *psz = &p[0x52];
333 while( psz < &p[p_sys->p_context->extradata_size - 8] )
335 int i_size = GetDWBE( psz );
338 /* FIXME handle 1 as long size */
341 if( !strncmp( &psz[4], "SMI ", 4 ) )
343 memmove( &p[0x52], psz,
344 &p[p_sys->p_context->extradata_size] - psz );
352 else if( p_dec->fmt_in.i_codec == VLC_FOURCC( 'R', 'V', '1', '0' ) ||
353 p_dec->fmt_in.i_codec == VLC_FOURCC( 'R', 'V', '1', '3' ) ||
354 p_dec->fmt_in.i_codec == VLC_FOURCC( 'R', 'V', '2', '0' ) )
356 if( p_dec->fmt_in.i_extra == 8 )
358 p_sys->p_context->extradata_size = 8;
359 p_sys->p_context->extradata = malloc( 8 );
361 memcpy( p_sys->p_context->extradata,
362 p_dec->fmt_in.p_extra,
363 p_dec->fmt_in.i_extra );
364 p_sys->p_context->sub_id= ((uint32_t*)p_dec->fmt_in.p_extra)[1];
366 msg_Warn( p_dec, "using extra data for RV codec sub_id=%08x",
367 p_sys->p_context->sub_id );
370 /* FIXME: remove when ffmpeg deals properly with avc1 */
371 else if( p_dec->fmt_in.i_codec == VLC_FOURCC('a','v','c','1') )
378 p_sys->p_context->extradata_size = i_size;
379 p_sys->p_context->extradata =
380 malloc( i_size + FF_INPUT_BUFFER_PADDING_SIZE );
381 memcpy( p_sys->p_context->extradata,
382 p_dec->fmt_in.p_extra, i_size );
383 memset( &((uint8_t*)p_sys->p_context->extradata)[i_size],
384 0, FF_INPUT_BUFFER_PADDING_SIZE );
388 /* ***** misc init ***** */
389 p_sys->input_pts = p_sys->input_dts = 0;
391 p_sys->b_has_b_frames = VLC_FALSE;
392 p_sys->b_first_frame = VLC_TRUE;
393 p_sys->i_late_frames = 0;
395 p_sys->i_buffer_orig = 1;
396 p_sys->p_buffer_orig = p_sys->p_buffer = malloc( p_sys->i_buffer_orig );
398 /* Set output properties */
399 p_dec->fmt_out.i_cat = VIDEO_ES;
400 p_dec->fmt_out.i_codec = ffmpeg_PixFmtToChroma( p_context->pix_fmt );
403 #if LIBAVCODEC_BUILD >= 4688
404 if( p_dec->fmt_in.video.p_palette )
405 p_sys->p_context->palctrl =
406 (AVPaletteControl *)p_dec->fmt_in.video.p_palette;
408 p_sys->p_context->palctrl = &palette_control;
411 /* ***** Open the codec ***** */
412 vlc_mutex_lock( lockval.p_address );
413 if( avcodec_open( p_sys->p_context, p_sys->p_codec ) < 0 )
415 vlc_mutex_unlock( lockval.p_address );
416 msg_Err( p_dec, "cannot open codec (%s)", p_sys->psz_namecodec );
420 vlc_mutex_unlock( lockval.p_address );
421 msg_Dbg( p_dec, "ffmpeg codec (%s) started", p_sys->psz_namecodec );
427 /*****************************************************************************
428 * DecodeVideo: Called to decode one or more frames
429 *****************************************************************************/
430 picture_t *E_(DecodeVideo)( decoder_t *p_dec, block_t **pp_block )
432 decoder_sys_t *p_sys = p_dec->p_sys;
434 int b_null_size = VLC_FALSE;
437 if( !pp_block || !*pp_block ) return NULL;
441 if( p_block->i_flags & (BLOCK_FLAG_DISCONTINUITY|BLOCK_FLAG_CORRUPTED) )
444 p_sys->i_pts = 0; /* To make sure we recover properly */
446 p_sys->input_pts = p_sys->input_dts = 0;
447 p_sys->i_late_frames = 0;
449 block_Release( p_block );
453 if( p_block->i_flags & BLOCK_FLAG_PREROLL )
455 /* Do not care about late frames when prerolling
456 * TODO avoid decoding of non reference frame
457 * (ie all B except for H264 where it depends only on nal_ref_idc) */
458 p_sys->i_late_frames = 0;
461 if( !p_dec->b_pace_control && p_sys->i_late_frames > 0 &&
462 mdate() - p_sys->i_late_frames_start > I64C(5000000) )
466 msg_Err( p_dec, "more than 5 seconds of late video -> "
467 "dropping frame (computer too slow ?)" );
468 p_sys->i_pts = 0; /* To make sure we recover properly */
470 block_Release( p_block );
471 p_sys->i_late_frames--;
475 if( p_block->i_pts > 0 || p_block->i_dts > 0 )
477 p_sys->input_pts = p_block->i_pts;
478 p_sys->input_dts = p_block->i_dts;
480 /* Make sure we don't reuse the same timestamps twice */
481 p_block->i_pts = p_block->i_dts = 0;
484 /* TODO implement it in a better way */
485 /* A good idea could be to decode all I pictures and see for the other */
486 if( !p_dec->b_pace_control &&
487 p_sys->b_hurry_up && p_sys->i_late_frames > 4 )
490 if( p_sys->i_late_frames < 8 )
492 p_sys->p_context->hurry_up = 2;
496 /* picture too late, won't decode
497 * but break picture until a new I, and for mpeg4 ...*/
499 p_sys->i_late_frames--; /* needed else it will never be decrease */
500 block_Release( p_block );
508 p_sys->p_context->hurry_up = 0;
512 if( p_sys->p_context->width <= 0 || p_sys->p_context->height <= 0 )
514 p_sys->p_context->hurry_up = 5;
515 b_null_size = VLC_TRUE;
519 * Do the actual decoding now
522 /* Check if post-processing was enabled */
523 p_sys->b_pp = p_sys->b_pp_async;
525 /* Don't forget that ffmpeg requires a little more bytes
526 * that the real frame size */
527 if( p_block->i_buffer > 0 )
529 p_sys->i_buffer = p_block->i_buffer;
530 if( p_sys->i_buffer + FF_INPUT_BUFFER_PADDING_SIZE >
531 p_sys->i_buffer_orig )
533 free( p_sys->p_buffer_orig );
534 p_sys->i_buffer_orig =
535 p_block->i_buffer + FF_INPUT_BUFFER_PADDING_SIZE;
536 p_sys->p_buffer_orig = malloc( p_sys->i_buffer_orig );
538 p_sys->p_buffer = p_sys->p_buffer_orig;
539 p_sys->i_buffer = p_block->i_buffer;
540 p_dec->p_vlc->pf_memcpy( p_sys->p_buffer, p_block->p_buffer,
542 memset( p_sys->p_buffer + p_block->i_buffer, 0,
543 FF_INPUT_BUFFER_PADDING_SIZE );
545 p_block->i_buffer = 0;
548 while( p_sys->i_buffer > 0 )
550 int i_used, b_gotpicture;
553 i_used = avcodec_decode_video( p_sys->p_context, p_sys->p_ff_pic,
555 p_sys->p_buffer, p_sys->i_buffer );
556 if( b_null_size && p_sys->p_context->width > 0 &&
557 p_sys->p_context->height > 0 )
559 /* Reparse it to not drop the I frame */
560 b_null_size = VLC_FALSE;
561 p_sys->p_context->hurry_up = 0;
562 i_used = avcodec_decode_video( p_sys->p_context, p_sys->p_ff_pic,
564 p_sys->p_buffer, p_sys->i_buffer );
569 msg_Warn( p_dec, "cannot decode one frame (%d bytes)",
571 block_Release( p_block );
574 else if( i_used > p_sys->i_buffer )
576 i_used = p_sys->i_buffer;
580 p_sys->i_buffer -= i_used;
581 p_sys->p_buffer += i_used;
583 /* Nothing to display */
586 if( i_used == 0 ) break;
590 /* Update frame late count (except when doing preroll) */
591 if( p_sys->i_pts && p_sys->i_pts <= mdate() &&
592 !(p_block->i_flags & BLOCK_FLAG_PREROLL) )
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 */
609 if( !p_sys->p_ff_pic->opaque )
611 /* Get a new picture */
612 p_pic = ffmpeg_NewPictBuf( p_dec, p_sys->p_context );
615 block_Release( p_block );
619 /* Fill p_picture_t from AVVideoFrame and do chroma conversion
621 ffmpeg_CopyPicture( p_dec, p_pic, p_sys->p_ff_pic );
625 p_pic = (picture_t *)p_sys->p_ff_pic->opaque;
629 if( p_sys->p_ff_pic->pts ) p_sys->i_pts = p_sys->p_ff_pic->pts;
631 /* Sanity check (seems to be needed for some streams ) */
632 if( p_sys->p_ff_pic->pict_type == FF_B_TYPE )
634 p_sys->b_has_b_frames = VLC_TRUE;
637 /* Send decoded frame to vout */
640 p_pic->date = p_sys->i_pts;
642 /* interpolate the next PTS */
643 if( p_sys->p_context->frame_rate > 0 )
645 p_sys->i_pts += I64C(1000000) *
646 (2 + p_sys->p_ff_pic->repeat_pict) *
647 p_sys->p_context->frame_rate_base /
648 (2 * p_sys->p_context->frame_rate);
651 if( p_sys->b_first_frame )
653 /* Hack to force display of still pictures */
654 p_sys->b_first_frame = VLC_FALSE;
655 p_pic->b_force = VLC_TRUE;
658 p_pic->i_nb_fields = 2 + p_sys->p_ff_pic->repeat_pict;
659 #if LIBAVCODEC_BUILD >= 4685
660 p_pic->b_progressive = !p_sys->p_ff_pic->interlaced_frame;
661 p_pic->b_top_field_first = p_sys->p_ff_pic->top_field_first;
668 p_dec->pf_vout_buffer_del( p_dec, p_pic );
672 block_Release( p_block );
676 /*****************************************************************************
677 * EndVideo: decoder destruction
678 *****************************************************************************
679 * This function is called when the thread ends after a sucessful
681 *****************************************************************************/
682 void E_(EndVideoDec)( decoder_t *p_dec )
684 decoder_sys_t *p_sys = p_dec->p_sys;
686 if( p_sys->p_ff_pic ) av_free( p_sys->p_ff_pic );
689 E_(ClosePostproc)( p_dec, p_sys->p_pp );
692 free( p_sys->p_buffer_orig );
695 /*****************************************************************************
696 * ffmpeg_CopyPicture: copy a picture from ffmpeg internal buffers to a
697 * picture_t structure (when not in direct rendering mode).
698 *****************************************************************************/
699 static void ffmpeg_CopyPicture( decoder_t *p_dec,
700 picture_t *p_pic, AVFrame *p_ff_pic )
702 decoder_sys_t *p_sys = p_dec->p_sys;
704 if( ffmpeg_PixFmtToChroma( p_sys->p_context->pix_fmt ) )
706 int i_plane, i_size, i_line;
707 uint8_t *p_dst, *p_src;
708 int i_src_stride, i_dst_stride;
711 if( p_sys->p_pp && p_sys->b_pp )
712 E_(PostprocPict)( p_dec, p_sys->p_pp, p_pic, p_ff_pic );
715 for( i_plane = 0; i_plane < p_pic->i_planes; i_plane++ )
717 p_src = p_ff_pic->data[i_plane];
718 p_dst = p_pic->p[i_plane].p_pixels;
719 i_src_stride = p_ff_pic->linesize[i_plane];
720 i_dst_stride = p_pic->p[i_plane].i_pitch;
722 i_size = __MIN( i_src_stride, i_dst_stride );
723 for( i_line = 0; i_line < p_pic->p[i_plane].i_visible_lines;
726 p_dec->p_vlc->pf_memcpy( p_dst, p_src, i_size );
727 p_src += i_src_stride;
728 p_dst += i_dst_stride;
737 /* we need to convert to I420 */
738 switch( p_sys->p_context->pix_fmt )
740 case PIX_FMT_YUV410P:
741 case PIX_FMT_YUV411P:
743 for( i = 0; i < p_pic->i_planes; i++ )
745 dest_pic.data[i] = p_pic->p[i].p_pixels;
746 dest_pic.linesize[i] = p_pic->p[i].i_pitch;
748 img_convert( &dest_pic, PIX_FMT_YUV420P,
749 (AVPicture *)p_ff_pic,
750 p_sys->p_context->pix_fmt,
751 p_sys->p_context->width,
752 p_sys->p_context->height );
755 msg_Err( p_dec, "don't know how to convert chroma %i",
756 p_sys->p_context->pix_fmt );
763 /*****************************************************************************
764 * ffmpeg_GetFrameBuf: callback used by ffmpeg to get a frame buffer.
765 *****************************************************************************
766 * It is used for direct rendering as well as to get the right PTS for each
767 * decoded picture (even in indirect rendering mode).
768 *****************************************************************************/
769 static int ffmpeg_GetFrameBuf( struct AVCodecContext *p_context,
772 decoder_t *p_dec = (decoder_t *)p_context->opaque;
773 decoder_sys_t *p_sys = p_dec->p_sys;
776 /* Set picture PTS */
777 if( p_sys->input_pts )
779 p_ff_pic->pts = p_sys->input_pts;
781 else if( p_sys->input_dts )
783 /* Some demuxers only set the dts so let's try to find a useful
784 * timestamp from this */
785 if( !p_context->has_b_frames || !p_sys->b_has_b_frames ||
786 !p_ff_pic->reference || !p_sys->i_pts )
788 p_ff_pic->pts = p_sys->input_dts;
790 else p_ff_pic->pts = 0;
792 else p_ff_pic->pts = 0;
794 if( p_sys->i_pts ) /* make sure 1st frame has a pts > 0 */
796 p_sys->input_pts = p_sys->input_dts = 0;
799 p_ff_pic->opaque = 0;
801 /* Not much to do in indirect rendering mode */
802 if( !p_sys->b_direct_rendering || p_sys->b_pp )
804 return avcodec_default_get_buffer( p_context, p_ff_pic );
807 /* Some codecs set pix_fmt only after the 1st frame has been decoded,
808 * so this check is necessary. */
809 if( !ffmpeg_PixFmtToChroma( p_context->pix_fmt ) ||
810 p_sys->p_context->width % 16 || p_sys->p_context->height % 16 )
812 msg_Dbg( p_dec, "disabling direct rendering" );
813 p_sys->b_direct_rendering = 0;
814 return avcodec_default_get_buffer( p_context, p_ff_pic );
817 /* Get a new picture */
818 //p_sys->p_vout->render.b_allow_modify_pics = 0;
819 p_pic = ffmpeg_NewPictBuf( p_dec, p_sys->p_context );
822 p_sys->b_direct_rendering = 0;
823 return avcodec_default_get_buffer( p_context, p_ff_pic );
825 p_sys->p_context->draw_horiz_band = NULL;
827 p_ff_pic->opaque = (void*)p_pic;
828 p_ff_pic->type = FF_BUFFER_TYPE_USER;
829 p_ff_pic->data[0] = p_pic->p[0].p_pixels;
830 p_ff_pic->data[1] = p_pic->p[1].p_pixels;
831 p_ff_pic->data[2] = p_pic->p[2].p_pixels;
832 p_ff_pic->data[3] = NULL; /* alpha channel but I'm not sure */
834 p_ff_pic->linesize[0] = p_pic->p[0].i_pitch;
835 p_ff_pic->linesize[1] = p_pic->p[1].i_pitch;
836 p_ff_pic->linesize[2] = p_pic->p[2].i_pitch;
837 p_ff_pic->linesize[3] = 0;
839 if( p_ff_pic->reference != 0 )
841 p_dec->pf_picture_link( p_dec, p_pic );
844 /* FIXME what is that, should give good value */
845 p_ff_pic->age = 256*256*256*64; // FIXME FIXME from ffmpeg
850 static void ffmpeg_ReleaseFrameBuf( struct AVCodecContext *p_context,
853 decoder_t *p_dec = (decoder_t *)p_context->opaque;
856 if( !p_ff_pic->opaque )
858 avcodec_default_release_buffer( p_context, p_ff_pic );
862 p_pic = (picture_t*)p_ff_pic->opaque;
864 p_ff_pic->data[0] = NULL;
865 p_ff_pic->data[1] = NULL;
866 p_ff_pic->data[2] = NULL;
867 p_ff_pic->data[3] = NULL;
869 if( p_ff_pic->reference != 0 )
871 p_dec->pf_picture_unlink( p_dec, p_pic );