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>
30 #include <vlc/input.h> /* hmmm, just for INPUT_RATE_DEFAULT */
33 #ifdef HAVE_FFMPEG_AVCODEC_H
34 # include <ffmpeg/avcodec.h>
41 /*****************************************************************************
42 * decoder_sys_t : decoder descriptor
43 *****************************************************************************/
46 /* Common part between video and audio decoder */
51 AVCodecContext *p_context;
54 /* Video decoder specific part */
60 BITMAPINFOHEADER *p_format;
62 /* for frame skipping algo */
66 /* how many decoded frames are late */
68 mtime_t i_late_frames_start;
70 /* for direct rendering */
71 int b_direct_rendering;
73 vlc_bool_t b_has_b_frames;
75 /* Hack to force display of still pictures */
76 vlc_bool_t b_first_frame;
78 int i_buffer_orig, i_buffer;
79 char *p_buffer_orig, *p_buffer;
81 /* Postprocessing handle */
84 vlc_bool_t b_pp_async;
88 /* FIXME (dummy palette for now) */
89 static AVPaletteControl palette_control;
91 /*****************************************************************************
93 *****************************************************************************/
94 static void ffmpeg_CopyPicture ( decoder_t *, picture_t *, AVFrame * );
95 static int ffmpeg_GetFrameBuf ( struct AVCodecContext *, AVFrame * );
96 static void ffmpeg_ReleaseFrameBuf( struct AVCodecContext *, AVFrame * );
98 static uint32_t ffmpeg_CodecTag( vlc_fourcc_t fcc )
100 uint8_t *p = (uint8_t*)&fcc;
101 return p[0] | (p[1] << 8) | (p[2] << 16) | (p[3] << 24);
104 /*****************************************************************************
106 *****************************************************************************/
107 static uint32_t ffmpeg_PixFmtToChroma( int i_ff_chroma )
109 switch( i_ff_chroma )
111 case PIX_FMT_YUV420P:
112 case PIX_FMT_YUVJ420P: /* Hacky but better then chroma conversion */
113 return VLC_FOURCC('I','4','2','0');
114 case PIX_FMT_YUV422P:
115 case PIX_FMT_YUVJ422P: /* Hacky but better then chroma conversion */
116 return VLC_FOURCC('I','4','2','2');
117 case PIX_FMT_YUV444P:
118 case PIX_FMT_YUVJ444P: /* Hacky but better then chroma conversion */
119 return VLC_FOURCC('I','4','4','4');
122 return VLC_FOURCC('Y','U','Y','2');
125 return VLC_FOURCC('R','V','1','5');
127 return VLC_FOURCC('R','V','1','6');
129 return VLC_FOURCC('R','V','2','4');
131 return VLC_FOURCC('R','V','3','2');
133 return VLC_FOURCC('G','R','E','Y');
135 case PIX_FMT_YUV410P:
136 case PIX_FMT_YUV411P:
143 /* Returns a new picture buffer */
144 static inline picture_t *ffmpeg_NewPictBuf( decoder_t *p_dec,
145 AVCodecContext *p_context )
147 decoder_sys_t *p_sys = p_dec->p_sys;
150 p_dec->fmt_out.video.i_width = p_context->width;
151 p_dec->fmt_out.video.i_height = p_context->height;
152 p_dec->fmt_out.i_codec = ffmpeg_PixFmtToChroma( p_context->pix_fmt );
154 if( !p_context->width || !p_context->height )
156 return NULL; /* invalid display size */
159 if( !p_dec->fmt_out.i_codec )
161 /* we make conversion if possible*/
162 p_dec->fmt_out.i_codec = VLC_FOURCC('I','4','2','0');
165 /* If an aspect-ratio was specified in the input format then force it */
166 if( p_dec->fmt_in.video.i_aspect )
168 p_dec->fmt_out.video.i_aspect = p_dec->fmt_in.video.i_aspect;
172 #if LIBAVCODEC_BUILD >= 4687
173 p_dec->fmt_out.video.i_aspect =
174 VOUT_ASPECT_FACTOR * ( av_q2d(p_context->sample_aspect_ratio) *
175 p_context->width / p_context->height );
176 p_dec->fmt_out.video.i_sar_num = p_context->sample_aspect_ratio.num;
177 p_dec->fmt_out.video.i_sar_den = p_context->sample_aspect_ratio.den;
179 p_dec->fmt_out.video.i_aspect =
180 VOUT_ASPECT_FACTOR * p_context->aspect_ratio;
182 if( p_dec->fmt_out.video.i_aspect == 0 )
184 p_dec->fmt_out.video.i_aspect =
185 VOUT_ASPECT_FACTOR * p_context->width / p_context->height;
189 if( p_context->frame_rate > 0 && p_context->frame_rate_base > 0 )
191 p_dec->fmt_out.video.i_frame_rate = p_context->frame_rate;
192 p_dec->fmt_out.video.i_frame_rate_base = p_context->frame_rate_base;
195 p_pic = p_dec->pf_vout_buffer_new( p_dec );
198 if( p_sys->p_pp && p_sys->b_pp && !p_sys->b_pp_init )
200 E_(InitPostproc)( p_dec, p_sys->p_pp, p_context->width,
201 p_context->height, p_context->pix_fmt );
202 p_sys->b_pp_init = VLC_TRUE;
209 /*****************************************************************************
210 * InitVideo: initialize the video decoder
211 *****************************************************************************
212 * the ffmpeg codec will be opened, some memory allocated. The vout is not yet
213 * opened (done after the first decoded frame).
214 *****************************************************************************/
215 int E_(InitVideoDec)( decoder_t *p_dec, AVCodecContext *p_context,
216 AVCodec *p_codec, int i_codec_id, char *psz_namecodec )
218 decoder_sys_t *p_sys;
222 var_Get( p_dec->p_libvlc, "avcodec", &lockval );
224 /* Allocate the memory needed to store the decoder's structure */
225 if( ( p_dec->p_sys = p_sys =
226 (decoder_sys_t *)malloc(sizeof(decoder_sys_t)) ) == NULL )
228 msg_Err( p_dec, "out of memory" );
232 p_dec->p_sys->p_context = p_context;
233 p_dec->p_sys->p_codec = p_codec;
234 p_dec->p_sys->i_codec_id = i_codec_id;
235 p_dec->p_sys->psz_namecodec = psz_namecodec;
236 p_sys->p_ff_pic = avcodec_alloc_frame();
238 /* ***** Fill p_context with init values ***** */
239 /* FIXME: remove when ffmpeg deals properly with avc1 */
240 if( p_dec->fmt_in.i_codec != VLC_FOURCC('a','v','c','1') )
242 p_sys->p_context->codec_tag = ffmpeg_CodecTag( p_dec->fmt_in.i_codec );
243 p_sys->p_context->width = p_dec->fmt_in.video.i_width;
244 p_sys->p_context->height = p_dec->fmt_in.video.i_height;
245 p_sys->p_context->bits_per_sample = p_dec->fmt_in.video.i_bits_per_pixel;
247 /* ***** Get configuration of ffmpeg plugin ***** */
248 p_sys->p_context->workaround_bugs =
249 config_GetInt( p_dec, "ffmpeg-workaround-bugs" );
250 p_sys->p_context->error_resilience =
251 config_GetInt( p_dec, "ffmpeg-error-resilience" );
253 var_Create( p_dec, "grayscale", VLC_VAR_BOOL | VLC_VAR_DOINHERIT );
254 var_Get( p_dec, "grayscale", &val );
255 if( val.b_bool ) p_sys->p_context->flags |= CODEC_FLAG_GRAY;
257 var_Create( p_dec, "ffmpeg-vismv", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT );
258 var_Get( p_dec, "ffmpeg-vismv", &val );
259 #if LIBAVCODEC_BUILD >= 4698
260 if( val.i_int ) p_sys->p_context->debug_mv = val.i_int;
263 var_Create( p_dec, "ffmpeg-lowres", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT );
264 var_Get( p_dec, "ffmpeg-lowres", &val );
265 #if LIBAVCODEC_BUILD >= 4723
266 if( val.i_int > 0 && val.i_int <= 2 ) p_sys->p_context->lowres = val.i_int;
269 /* ***** ffmpeg frame skipping ***** */
270 var_Create( p_dec, "ffmpeg-hurry-up", VLC_VAR_BOOL | VLC_VAR_DOINHERIT );
271 var_Get( p_dec, "ffmpeg-hurry-up", &val );
272 p_sys->b_hurry_up = val.b_bool;
274 /* ***** ffmpeg direct rendering ***** */
275 p_sys->b_direct_rendering = 0;
276 var_Create( p_dec, "ffmpeg-dr", VLC_VAR_BOOL | VLC_VAR_DOINHERIT );
277 var_Get( p_dec, "ffmpeg-dr", &val );
278 if( val.b_bool && (p_sys->p_codec->capabilities & CODEC_CAP_DR1) &&
279 ffmpeg_PixFmtToChroma( p_sys->p_context->pix_fmt ) &&
280 /* Apparently direct rendering doesn't work with YUV422P */
281 p_sys->p_context->pix_fmt != PIX_FMT_YUV422P &&
282 /* H264 uses too many reference frames */
283 p_sys->i_codec_id != CODEC_ID_H264 &&
284 !(p_sys->p_context->width % 16) && !(p_sys->p_context->height % 16) &&
285 #if LIBAVCODEC_BUILD >= 4698
286 !p_sys->p_context->debug_mv )
291 /* Some codecs set pix_fmt only after the 1st frame has been decoded,
292 * so we need to do another check in ffmpeg_GetFrameBuf() */
293 p_sys->b_direct_rendering = 1;
298 p_sys->b_pp = p_sys->b_pp_async = p_sys->b_pp_init = VLC_FALSE;
299 p_sys->p_pp = E_(OpenPostproc)( p_dec, &p_sys->b_pp_async );
302 /* ffmpeg doesn't properly release old pictures when frames are skipped */
303 //if( p_sys->b_hurry_up ) p_sys->b_direct_rendering = 0;
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->release_buffer = ffmpeg_ReleaseFrameBuf;
314 p_sys->p_context->opaque = p_dec;
316 /* ***** init this codec with special data ***** */
317 if( p_dec->fmt_in.i_extra )
319 int i_size = p_dec->fmt_in.i_extra;
321 if( p_sys->i_codec_id == CODEC_ID_SVQ3 )
325 p_sys->p_context->extradata_size = i_size + 12;
326 p = p_sys->p_context->extradata =
327 malloc( p_sys->p_context->extradata_size );
329 memcpy( &p[0], "SVQ3", 4 );
330 memset( &p[4], 0, 8 );
331 memcpy( &p[12], p_dec->fmt_in.p_extra, i_size );
333 /* Now remove all atoms before the SMI one */
334 if( p_sys->p_context->extradata_size > 0x5a &&
335 strncmp( &p[0x56], "SMI ", 4 ) )
337 uint8_t *psz = &p[0x52];
339 while( psz < &p[p_sys->p_context->extradata_size - 8] )
341 int i_size = GetDWBE( psz );
344 /* FIXME handle 1 as long size */
347 if( !strncmp( &psz[4], "SMI ", 4 ) )
349 memmove( &p[0x52], psz,
350 &p[p_sys->p_context->extradata_size] - psz );
358 else if( p_dec->fmt_in.i_codec == VLC_FOURCC( 'R', 'V', '1', '0' ) ||
359 p_dec->fmt_in.i_codec == VLC_FOURCC( 'R', 'V', '1', '3' ) ||
360 p_dec->fmt_in.i_codec == VLC_FOURCC( 'R', 'V', '2', '0' ) )
362 if( p_dec->fmt_in.i_extra == 8 )
364 p_sys->p_context->extradata_size = 8;
365 p_sys->p_context->extradata = malloc( 8 );
367 memcpy( p_sys->p_context->extradata,
368 p_dec->fmt_in.p_extra,
369 p_dec->fmt_in.i_extra );
370 p_sys->p_context->sub_id= ((uint32_t*)p_dec->fmt_in.p_extra)[1];
372 msg_Warn( p_dec, "using extra data for RV codec sub_id=%08x",
373 p_sys->p_context->sub_id );
376 /* FIXME: remove when ffmpeg deals properly with avc1 */
377 else if( p_dec->fmt_in.i_codec == VLC_FOURCC('a','v','c','1') )
384 p_sys->p_context->extradata_size = i_size;
385 p_sys->p_context->extradata =
386 malloc( i_size + FF_INPUT_BUFFER_PADDING_SIZE );
387 memcpy( p_sys->p_context->extradata,
388 p_dec->fmt_in.p_extra, i_size );
389 memset( &((uint8_t*)p_sys->p_context->extradata)[i_size],
390 0, FF_INPUT_BUFFER_PADDING_SIZE );
394 /* ***** misc init ***** */
395 p_sys->input_pts = p_sys->input_dts = 0;
397 p_sys->b_has_b_frames = VLC_FALSE;
398 p_sys->b_first_frame = VLC_TRUE;
399 p_sys->i_late_frames = 0;
401 p_sys->i_buffer_orig = 1;
402 p_sys->p_buffer_orig = p_sys->p_buffer = malloc( p_sys->i_buffer_orig );
404 /* Set output properties */
405 p_dec->fmt_out.i_cat = VIDEO_ES;
406 p_dec->fmt_out.i_codec = ffmpeg_PixFmtToChroma( p_context->pix_fmt );
409 #if LIBAVCODEC_BUILD >= 4688
410 if( p_dec->fmt_in.video.p_palette )
411 p_sys->p_context->palctrl =
412 (AVPaletteControl *)p_dec->fmt_in.video.p_palette;
414 p_sys->p_context->palctrl = &palette_control;
417 /* ***** Open the codec ***** */
418 vlc_mutex_lock( lockval.p_address );
419 if( avcodec_open( p_sys->p_context, p_sys->p_codec ) < 0 )
421 vlc_mutex_unlock( lockval.p_address );
422 msg_Err( p_dec, "cannot open codec (%s)", p_sys->psz_namecodec );
426 vlc_mutex_unlock( lockval.p_address );
427 msg_Dbg( p_dec, "ffmpeg codec (%s) started", p_sys->psz_namecodec );
433 /*****************************************************************************
434 * DecodeVideo: Called to decode one or more frames
435 *****************************************************************************/
436 picture_t *E_(DecodeVideo)( decoder_t *p_dec, block_t **pp_block )
438 decoder_sys_t *p_sys = p_dec->p_sys;
440 int b_null_size = VLC_FALSE;
443 if( !pp_block || !*pp_block ) return NULL;
447 if( p_block->i_flags & (BLOCK_FLAG_DISCONTINUITY|BLOCK_FLAG_CORRUPTED) )
450 p_sys->i_pts = 0; /* To make sure we recover properly */
452 p_sys->input_pts = p_sys->input_dts = 0;
453 p_sys->i_late_frames = 0;
455 block_Release( p_block );
459 if( p_block->i_flags & BLOCK_FLAG_PREROLL )
461 /* Do not care about late frames when prerolling
462 * TODO avoid decoding of non reference frame
463 * (ie all B except for H264 where it depends only on nal_ref_idc) */
464 p_sys->i_late_frames = 0;
467 if( !p_dec->b_pace_control && p_sys->i_late_frames > 0 &&
468 mdate() - p_sys->i_late_frames_start > I64C(5000000) )
472 msg_Err( p_dec, "more than 5 seconds of late video -> "
473 "dropping frame (computer too slow ?)" );
474 p_sys->i_pts = 0; /* To make sure we recover properly */
476 block_Release( p_block );
477 p_sys->i_late_frames--;
481 if( p_block->i_pts > 0 || p_block->i_dts > 0 )
483 p_sys->input_pts = p_block->i_pts;
484 p_sys->input_dts = p_block->i_dts;
486 /* Make sure we don't reuse the same timestamps twice */
487 p_block->i_pts = p_block->i_dts = 0;
490 /* TODO implement it in a better way */
491 /* A good idea could be to decode all I pictures and see for the other */
492 if( !p_dec->b_pace_control &&
493 p_sys->b_hurry_up && p_sys->i_late_frames > 4 )
496 if( p_sys->i_late_frames < 8 )
498 p_sys->p_context->hurry_up = 2;
502 /* picture too late, won't decode
503 * but break picture until a new I, and for mpeg4 ...*/
505 p_sys->i_late_frames--; /* needed else it will never be decrease */
506 block_Release( p_block );
513 if (!(p_block->i_flags & BLOCK_FLAG_PREROLL))
516 p_sys->p_context->hurry_up = 0;
521 p_sys->p_context->hurry_up = 1;
526 if( p_sys->p_context->width <= 0 || p_sys->p_context->height <= 0 )
528 p_sys->p_context->hurry_up = 5;
529 b_null_size = VLC_TRUE;
533 * Do the actual decoding now
536 /* Check if post-processing was enabled */
537 p_sys->b_pp = p_sys->b_pp_async;
539 /* Don't forget that ffmpeg requires a little more bytes
540 * that the real frame size */
541 if( p_block->i_buffer > 0 )
543 p_sys->i_buffer = p_block->i_buffer;
544 if( p_sys->i_buffer + FF_INPUT_BUFFER_PADDING_SIZE >
545 p_sys->i_buffer_orig )
547 free( p_sys->p_buffer_orig );
548 p_sys->i_buffer_orig =
549 p_block->i_buffer + FF_INPUT_BUFFER_PADDING_SIZE;
550 p_sys->p_buffer_orig = malloc( p_sys->i_buffer_orig );
552 p_sys->p_buffer = p_sys->p_buffer_orig;
553 p_sys->i_buffer = p_block->i_buffer;
554 p_dec->p_vlc->pf_memcpy( p_sys->p_buffer, p_block->p_buffer,
556 memset( p_sys->p_buffer + p_block->i_buffer, 0,
557 FF_INPUT_BUFFER_PADDING_SIZE );
559 p_block->i_buffer = 0;
562 while( p_sys->i_buffer > 0 )
564 int i_used, b_gotpicture;
567 i_used = avcodec_decode_video( p_sys->p_context, p_sys->p_ff_pic,
569 p_sys->p_buffer, p_sys->i_buffer );
570 if( b_null_size && p_sys->p_context->width > 0 &&
571 p_sys->p_context->height > 0 )
573 /* Reparse it to not drop the I frame */
574 b_null_size = VLC_FALSE;
575 p_sys->p_context->hurry_up = 0;
576 i_used = avcodec_decode_video( p_sys->p_context, p_sys->p_ff_pic,
578 p_sys->p_buffer, p_sys->i_buffer );
583 msg_Warn( p_dec, "cannot decode one frame (%d bytes)",
585 block_Release( p_block );
588 else if( i_used > p_sys->i_buffer )
590 i_used = p_sys->i_buffer;
594 p_sys->i_buffer -= i_used;
595 p_sys->p_buffer += i_used;
597 /* Nothing to display */
600 if( i_used == 0 ) break;
604 /* Update frame late count (except when doing preroll) */
605 if( p_sys->i_pts && p_sys->i_pts <= mdate() &&
606 !(p_block->i_flags & BLOCK_FLAG_PREROLL) )
608 p_sys->i_late_frames++;
609 if( p_sys->i_late_frames == 1 )
610 p_sys->i_late_frames_start = mdate();
614 p_sys->i_late_frames = 0;
617 if( !b_drawpicture || !p_sys->p_ff_pic->linesize[0] )
619 /* Do not display the picture */
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;
643 if( p_sys->p_ff_pic->pts ) p_sys->i_pts = p_sys->p_ff_pic->pts;
645 /* Sanity check (seems to be needed for some streams ) */
646 if( p_sys->p_ff_pic->pict_type == FF_B_TYPE )
648 p_sys->b_has_b_frames = VLC_TRUE;
651 /* Send decoded frame to vout */
654 p_pic->date = p_sys->i_pts;
656 /* interpolate the next PTS */
657 if( p_sys->p_context->frame_rate > 0 )
659 p_sys->i_pts += I64C(1000000) *
660 (2 + p_sys->p_ff_pic->repeat_pict) *
661 p_sys->p_context->frame_rate_base *
662 p_block->i_rate / INPUT_RATE_DEFAULT /
663 (2 * p_sys->p_context->frame_rate);
666 if( p_sys->b_first_frame )
668 /* Hack to force display of still pictures */
669 p_sys->b_first_frame = VLC_FALSE;
670 p_pic->b_force = VLC_TRUE;
673 p_pic->i_nb_fields = 2 + p_sys->p_ff_pic->repeat_pict;
674 #if LIBAVCODEC_BUILD >= 4685
675 p_pic->b_progressive = !p_sys->p_ff_pic->interlaced_frame;
676 p_pic->b_top_field_first = p_sys->p_ff_pic->top_field_first;
683 p_dec->pf_vout_buffer_del( p_dec, p_pic );
687 block_Release( p_block );
691 /*****************************************************************************
692 * EndVideo: decoder destruction
693 *****************************************************************************
694 * This function is called when the thread ends after a sucessful
696 *****************************************************************************/
697 void E_(EndVideoDec)( decoder_t *p_dec )
699 decoder_sys_t *p_sys = p_dec->p_sys;
701 if( p_sys->p_ff_pic ) av_free( p_sys->p_ff_pic );
704 E_(ClosePostproc)( p_dec, p_sys->p_pp );
707 free( p_sys->p_buffer_orig );
710 /*****************************************************************************
711 * ffmpeg_CopyPicture: copy a picture from ffmpeg internal buffers to a
712 * picture_t structure (when not in direct rendering mode).
713 *****************************************************************************/
714 static void ffmpeg_CopyPicture( decoder_t *p_dec,
715 picture_t *p_pic, AVFrame *p_ff_pic )
717 decoder_sys_t *p_sys = p_dec->p_sys;
719 if( ffmpeg_PixFmtToChroma( p_sys->p_context->pix_fmt ) )
721 int i_plane, i_size, i_line;
722 uint8_t *p_dst, *p_src;
723 int i_src_stride, i_dst_stride;
726 if( p_sys->p_pp && p_sys->b_pp )
727 E_(PostprocPict)( p_dec, p_sys->p_pp, p_pic, p_ff_pic );
730 for( i_plane = 0; i_plane < p_pic->i_planes; i_plane++ )
732 p_src = p_ff_pic->data[i_plane];
733 p_dst = p_pic->p[i_plane].p_pixels;
734 i_src_stride = p_ff_pic->linesize[i_plane];
735 i_dst_stride = p_pic->p[i_plane].i_pitch;
737 i_size = __MIN( i_src_stride, i_dst_stride );
738 for( i_line = 0; i_line < p_pic->p[i_plane].i_visible_lines;
741 p_dec->p_vlc->pf_memcpy( p_dst, p_src, i_size );
742 p_src += i_src_stride;
743 p_dst += i_dst_stride;
752 /* we need to convert to I420 */
753 switch( p_sys->p_context->pix_fmt )
755 case PIX_FMT_YUV410P:
756 case PIX_FMT_YUV411P:
758 for( i = 0; i < p_pic->i_planes; i++ )
760 dest_pic.data[i] = p_pic->p[i].p_pixels;
761 dest_pic.linesize[i] = p_pic->p[i].i_pitch;
763 img_convert( &dest_pic, PIX_FMT_YUV420P,
764 (AVPicture *)p_ff_pic,
765 p_sys->p_context->pix_fmt,
766 p_sys->p_context->width,
767 p_sys->p_context->height );
770 msg_Err( p_dec, "don't know how to convert chroma %i",
771 p_sys->p_context->pix_fmt );
778 /*****************************************************************************
779 * ffmpeg_GetFrameBuf: callback used by ffmpeg to get a frame buffer.
780 *****************************************************************************
781 * It is used for direct rendering as well as to get the right PTS for each
782 * decoded picture (even in indirect rendering mode).
783 *****************************************************************************/
784 static int ffmpeg_GetFrameBuf( struct AVCodecContext *p_context,
787 decoder_t *p_dec = (decoder_t *)p_context->opaque;
788 decoder_sys_t *p_sys = p_dec->p_sys;
791 /* Set picture PTS */
792 if( p_sys->input_pts )
794 p_ff_pic->pts = p_sys->input_pts;
796 else if( p_sys->input_dts )
798 /* Some demuxers only set the dts so let's try to find a useful
799 * timestamp from this */
800 if( !p_context->has_b_frames || !p_sys->b_has_b_frames ||
801 !p_ff_pic->reference || !p_sys->i_pts )
803 p_ff_pic->pts = p_sys->input_dts;
805 else p_ff_pic->pts = 0;
807 else p_ff_pic->pts = 0;
809 if( p_sys->i_pts ) /* make sure 1st frame has a pts > 0 */
811 p_sys->input_pts = p_sys->input_dts = 0;
814 p_ff_pic->opaque = 0;
816 /* Not much to do in indirect rendering mode */
817 if( !p_sys->b_direct_rendering || p_sys->b_pp )
819 return avcodec_default_get_buffer( p_context, p_ff_pic );
822 /* Some codecs set pix_fmt only after the 1st frame has been decoded,
823 * so this check is necessary. */
824 if( !ffmpeg_PixFmtToChroma( p_context->pix_fmt ) ||
825 p_sys->p_context->width % 16 || p_sys->p_context->height % 16 )
827 msg_Dbg( p_dec, "disabling direct rendering" );
828 p_sys->b_direct_rendering = 0;
829 return avcodec_default_get_buffer( p_context, p_ff_pic );
832 /* Get a new picture */
833 //p_sys->p_vout->render.b_allow_modify_pics = 0;
834 p_pic = ffmpeg_NewPictBuf( p_dec, p_sys->p_context );
837 p_sys->b_direct_rendering = 0;
838 return avcodec_default_get_buffer( p_context, p_ff_pic );
840 p_sys->p_context->draw_horiz_band = NULL;
842 p_ff_pic->opaque = (void*)p_pic;
843 p_ff_pic->type = FF_BUFFER_TYPE_USER;
844 p_ff_pic->data[0] = p_pic->p[0].p_pixels;
845 p_ff_pic->data[1] = p_pic->p[1].p_pixels;
846 p_ff_pic->data[2] = p_pic->p[2].p_pixels;
847 p_ff_pic->data[3] = NULL; /* alpha channel but I'm not sure */
849 p_ff_pic->linesize[0] = p_pic->p[0].i_pitch;
850 p_ff_pic->linesize[1] = p_pic->p[1].i_pitch;
851 p_ff_pic->linesize[2] = p_pic->p[2].i_pitch;
852 p_ff_pic->linesize[3] = 0;
854 if( p_ff_pic->reference != 0 )
856 p_dec->pf_picture_link( p_dec, p_pic );
859 /* FIXME what is that, should give good value */
860 p_ff_pic->age = 256*256*256*64; // FIXME FIXME from ffmpeg
865 static void ffmpeg_ReleaseFrameBuf( struct AVCodecContext *p_context,
868 decoder_t *p_dec = (decoder_t *)p_context->opaque;
871 if( !p_ff_pic->opaque )
873 avcodec_default_release_buffer( p_context, p_ff_pic );
877 p_pic = (picture_t*)p_ff_pic->opaque;
879 p_ff_pic->data[0] = NULL;
880 p_ff_pic->data[1] = NULL;
881 p_ff_pic->data[2] = NULL;
882 p_ff_pic->data[3] = NULL;
884 if( p_ff_pic->reference != 0 )
886 p_dec->pf_picture_unlink( p_dec, p_pic );