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 );
172 p_dec->fmt_out.video.i_sar_num = p_context->sample_aspect_ratio.num;
173 p_dec->fmt_out.video.i_sar_den = p_context->sample_aspect_ratio.den;
175 p_dec->fmt_out.video.i_aspect =
176 VOUT_ASPECT_FACTOR * p_context->aspect_ratio;
178 if( p_dec->fmt_out.video.i_aspect == 0 )
180 p_dec->fmt_out.video.i_aspect =
181 VOUT_ASPECT_FACTOR * p_context->width / p_context->height;
185 if( p_context->frame_rate > 0 && p_context->frame_rate_base > 0 )
187 p_dec->fmt_out.video.i_frame_rate = p_context->frame_rate;
188 p_dec->fmt_out.video.i_frame_rate_base = p_context->frame_rate_base;
191 p_pic = p_dec->pf_vout_buffer_new( p_dec );
194 if( p_sys->p_pp && p_sys->b_pp && !p_sys->b_pp_init )
196 E_(InitPostproc)( p_dec, p_sys->p_pp, p_context->width,
197 p_context->height, p_context->pix_fmt );
198 p_sys->b_pp_init = VLC_TRUE;
205 /*****************************************************************************
206 * InitVideo: initialize the video decoder
207 *****************************************************************************
208 * the ffmpeg codec will be opened, some memory allocated. The vout is not yet
209 * opened (done after the first decoded frame).
210 *****************************************************************************/
211 int E_(InitVideoDec)( decoder_t *p_dec, AVCodecContext *p_context,
212 AVCodec *p_codec, int i_codec_id, char *psz_namecodec )
214 decoder_sys_t *p_sys;
218 var_Get( p_dec->p_libvlc, "avcodec", &lockval );
220 /* Allocate the memory needed to store the decoder's structure */
221 if( ( p_dec->p_sys = p_sys =
222 (decoder_sys_t *)malloc(sizeof(decoder_sys_t)) ) == NULL )
224 msg_Err( p_dec, "out of memory" );
228 p_dec->p_sys->p_context = p_context;
229 p_dec->p_sys->p_codec = p_codec;
230 p_dec->p_sys->i_codec_id = i_codec_id;
231 p_dec->p_sys->psz_namecodec = psz_namecodec;
232 p_sys->p_ff_pic = avcodec_alloc_frame();
234 /* ***** Fill p_context with init values ***** */
235 /* FIXME: remove when ffmpeg deals properly with avc1 */
236 if( p_dec->fmt_in.i_codec != VLC_FOURCC('a','v','c','1') )
238 p_sys->p_context->codec_tag = ffmpeg_CodecTag( p_dec->fmt_in.i_codec );
239 p_sys->p_context->width = p_dec->fmt_in.video.i_width;
240 p_sys->p_context->height = p_dec->fmt_in.video.i_height;
241 p_sys->p_context->bits_per_sample = p_dec->fmt_in.video.i_bits_per_pixel;
243 /* ***** Get configuration of ffmpeg plugin ***** */
244 p_sys->p_context->workaround_bugs =
245 config_GetInt( p_dec, "ffmpeg-workaround-bugs" );
246 p_sys->p_context->error_resilience =
247 config_GetInt( p_dec, "ffmpeg-error-resilience" );
249 var_Create( p_dec, "grayscale", VLC_VAR_BOOL | VLC_VAR_DOINHERIT );
250 var_Get( p_dec, "grayscale", &val );
251 if( val.b_bool ) p_sys->p_context->flags |= CODEC_FLAG_GRAY;
253 var_Create( p_dec, "ffmpeg-vismv", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT );
254 var_Get( p_dec, "ffmpeg-vismv", &val );
255 #if LIBAVCODEC_BUILD >= 4698
256 if( val.i_int ) p_sys->p_context->debug_mv = val.i_int;
259 var_Create( p_dec, "ffmpeg-lowres", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT );
260 var_Get( p_dec, "ffmpeg-lowres", &val );
261 #if LIBAVCODEC_BUILD >= 4723
262 if( val.i_int > 0 && val.i_int <= 2 ) p_sys->p_context->lowres = val.i_int;
265 /* ***** ffmpeg frame skipping ***** */
266 var_Create( p_dec, "ffmpeg-hurry-up", VLC_VAR_BOOL | VLC_VAR_DOINHERIT );
267 var_Get( p_dec, "ffmpeg-hurry-up", &val );
268 p_sys->b_hurry_up = val.b_bool;
270 /* ***** ffmpeg direct rendering ***** */
271 p_sys->b_direct_rendering = 0;
272 var_Create( p_dec, "ffmpeg-dr", VLC_VAR_BOOL | VLC_VAR_DOINHERIT );
273 var_Get( p_dec, "ffmpeg-dr", &val );
274 if( val.b_bool && (p_sys->p_codec->capabilities & CODEC_CAP_DR1) &&
275 ffmpeg_PixFmtToChroma( p_sys->p_context->pix_fmt ) &&
276 /* Apparently direct rendering doesn't work with YUV422P */
277 p_sys->p_context->pix_fmt != PIX_FMT_YUV422P &&
278 /* H264 uses too many reference frames */
279 p_sys->i_codec_id != CODEC_ID_H264 &&
280 !(p_sys->p_context->width % 16) && !(p_sys->p_context->height % 16) &&
281 #if LIBAVCODEC_BUILD >= 4698
282 !p_sys->p_context->debug_mv )
287 /* Some codecs set pix_fmt only after the 1st frame has been decoded,
288 * so we need to do another check in ffmpeg_GetFrameBuf() */
289 p_sys->b_direct_rendering = 1;
294 p_sys->b_pp = p_sys->b_pp_async = p_sys->b_pp_init = VLC_FALSE;
295 p_sys->p_pp = E_(OpenPostproc)( p_dec, &p_sys->b_pp_async );
298 /* ffmpeg doesn't properly release old pictures when frames are skipped */
299 //if( p_sys->b_hurry_up ) p_sys->b_direct_rendering = 0;
300 if( p_sys->b_direct_rendering )
302 msg_Dbg( p_dec, "using direct rendering" );
303 p_sys->p_context->flags |= CODEC_FLAG_EMU_EDGE;
306 /* Always use our get_buffer wrapper so we can calculate the
308 p_sys->p_context->get_buffer = ffmpeg_GetFrameBuf;
309 p_sys->p_context->release_buffer = ffmpeg_ReleaseFrameBuf;
310 p_sys->p_context->opaque = p_dec;
312 /* ***** init this codec with special data ***** */
313 if( p_dec->fmt_in.i_extra )
315 int i_size = p_dec->fmt_in.i_extra;
317 if( p_sys->i_codec_id == CODEC_ID_SVQ3 )
321 p_sys->p_context->extradata_size = i_size + 12;
322 p = p_sys->p_context->extradata =
323 malloc( p_sys->p_context->extradata_size );
325 memcpy( &p[0], "SVQ3", 4 );
326 memset( &p[4], 0, 8 );
327 memcpy( &p[12], p_dec->fmt_in.p_extra, i_size );
329 /* Now remove all atoms before the SMI one */
330 if( p_sys->p_context->extradata_size > 0x5a &&
331 strncmp( &p[0x56], "SMI ", 4 ) )
333 uint8_t *psz = &p[0x52];
335 while( psz < &p[p_sys->p_context->extradata_size - 8] )
337 int i_size = GetDWBE( psz );
340 /* FIXME handle 1 as long size */
343 if( !strncmp( &psz[4], "SMI ", 4 ) )
345 memmove( &p[0x52], psz,
346 &p[p_sys->p_context->extradata_size] - psz );
354 else if( p_dec->fmt_in.i_codec == VLC_FOURCC( 'R', 'V', '1', '0' ) ||
355 p_dec->fmt_in.i_codec == VLC_FOURCC( 'R', 'V', '1', '3' ) ||
356 p_dec->fmt_in.i_codec == VLC_FOURCC( 'R', 'V', '2', '0' ) )
358 if( p_dec->fmt_in.i_extra == 8 )
360 p_sys->p_context->extradata_size = 8;
361 p_sys->p_context->extradata = malloc( 8 );
363 memcpy( p_sys->p_context->extradata,
364 p_dec->fmt_in.p_extra,
365 p_dec->fmt_in.i_extra );
366 p_sys->p_context->sub_id= ((uint32_t*)p_dec->fmt_in.p_extra)[1];
368 msg_Warn( p_dec, "using extra data for RV codec sub_id=%08x",
369 p_sys->p_context->sub_id );
372 /* FIXME: remove when ffmpeg deals properly with avc1 */
373 else if( p_dec->fmt_in.i_codec == VLC_FOURCC('a','v','c','1') )
380 p_sys->p_context->extradata_size = i_size;
381 p_sys->p_context->extradata =
382 malloc( i_size + FF_INPUT_BUFFER_PADDING_SIZE );
383 memcpy( p_sys->p_context->extradata,
384 p_dec->fmt_in.p_extra, i_size );
385 memset( &((uint8_t*)p_sys->p_context->extradata)[i_size],
386 0, FF_INPUT_BUFFER_PADDING_SIZE );
390 /* ***** misc init ***** */
391 p_sys->input_pts = p_sys->input_dts = 0;
393 p_sys->b_has_b_frames = VLC_FALSE;
394 p_sys->b_first_frame = VLC_TRUE;
395 p_sys->i_late_frames = 0;
397 p_sys->i_buffer_orig = 1;
398 p_sys->p_buffer_orig = p_sys->p_buffer = malloc( p_sys->i_buffer_orig );
400 /* Set output properties */
401 p_dec->fmt_out.i_cat = VIDEO_ES;
402 p_dec->fmt_out.i_codec = ffmpeg_PixFmtToChroma( p_context->pix_fmt );
405 #if LIBAVCODEC_BUILD >= 4688
406 if( p_dec->fmt_in.video.p_palette )
407 p_sys->p_context->palctrl =
408 (AVPaletteControl *)p_dec->fmt_in.video.p_palette;
410 p_sys->p_context->palctrl = &palette_control;
413 /* ***** Open the codec ***** */
414 vlc_mutex_lock( lockval.p_address );
415 if( avcodec_open( p_sys->p_context, p_sys->p_codec ) < 0 )
417 vlc_mutex_unlock( lockval.p_address );
418 msg_Err( p_dec, "cannot open codec (%s)", p_sys->psz_namecodec );
422 vlc_mutex_unlock( lockval.p_address );
423 msg_Dbg( p_dec, "ffmpeg codec (%s) started", p_sys->psz_namecodec );
429 /*****************************************************************************
430 * DecodeVideo: Called to decode one or more frames
431 *****************************************************************************/
432 picture_t *E_(DecodeVideo)( decoder_t *p_dec, block_t **pp_block )
434 decoder_sys_t *p_sys = p_dec->p_sys;
436 int b_null_size = VLC_FALSE;
439 if( !pp_block || !*pp_block ) return NULL;
443 if( p_block->i_flags & (BLOCK_FLAG_DISCONTINUITY|BLOCK_FLAG_CORRUPTED) )
446 p_sys->i_pts = 0; /* To make sure we recover properly */
448 p_sys->input_pts = p_sys->input_dts = 0;
449 p_sys->i_late_frames = 0;
451 block_Release( p_block );
455 if( p_block->i_flags & BLOCK_FLAG_PREROLL )
457 /* Do not care about late frames when prerolling
458 * TODO avoid decoding of non reference frame
459 * (ie all B except for H264 where it depends only on nal_ref_idc) */
460 p_sys->i_late_frames = 0;
463 if( !p_dec->b_pace_control && p_sys->i_late_frames > 0 &&
464 mdate() - p_sys->i_late_frames_start > I64C(5000000) )
468 msg_Err( p_dec, "more than 5 seconds of late video -> "
469 "dropping frame (computer too slow ?)" );
470 p_sys->i_pts = 0; /* To make sure we recover properly */
472 block_Release( p_block );
473 p_sys->i_late_frames--;
477 if( p_block->i_pts > 0 || p_block->i_dts > 0 )
479 p_sys->input_pts = p_block->i_pts;
480 p_sys->input_dts = p_block->i_dts;
482 /* Make sure we don't reuse the same timestamps twice */
483 p_block->i_pts = p_block->i_dts = 0;
486 /* TODO implement it in a better way */
487 /* A good idea could be to decode all I pictures and see for the other */
488 if( !p_dec->b_pace_control &&
489 p_sys->b_hurry_up && p_sys->i_late_frames > 4 )
492 if( p_sys->i_late_frames < 8 )
494 p_sys->p_context->hurry_up = 2;
498 /* picture too late, won't decode
499 * but break picture until a new I, and for mpeg4 ...*/
501 p_sys->i_late_frames--; /* needed else it will never be decrease */
502 block_Release( p_block );
509 if (!(p_block->i_flags & BLOCK_FLAG_PREROLL))
512 p_sys->p_context->hurry_up = 0;
517 p_sys->p_context->hurry_up = 1;
522 if( p_sys->p_context->width <= 0 || p_sys->p_context->height <= 0 )
524 p_sys->p_context->hurry_up = 5;
525 b_null_size = VLC_TRUE;
529 * Do the actual decoding now
532 /* Check if post-processing was enabled */
533 p_sys->b_pp = p_sys->b_pp_async;
535 /* Don't forget that ffmpeg requires a little more bytes
536 * that the real frame size */
537 if( p_block->i_buffer > 0 )
539 p_sys->i_buffer = p_block->i_buffer;
540 if( p_sys->i_buffer + FF_INPUT_BUFFER_PADDING_SIZE >
541 p_sys->i_buffer_orig )
543 free( p_sys->p_buffer_orig );
544 p_sys->i_buffer_orig =
545 p_block->i_buffer + FF_INPUT_BUFFER_PADDING_SIZE;
546 p_sys->p_buffer_orig = malloc( p_sys->i_buffer_orig );
548 p_sys->p_buffer = p_sys->p_buffer_orig;
549 p_sys->i_buffer = p_block->i_buffer;
550 p_dec->p_vlc->pf_memcpy( p_sys->p_buffer, p_block->p_buffer,
552 memset( p_sys->p_buffer + p_block->i_buffer, 0,
553 FF_INPUT_BUFFER_PADDING_SIZE );
555 p_block->i_buffer = 0;
558 while( p_sys->i_buffer > 0 )
560 int i_used, b_gotpicture;
563 i_used = avcodec_decode_video( p_sys->p_context, p_sys->p_ff_pic,
565 p_sys->p_buffer, p_sys->i_buffer );
566 if( b_null_size && p_sys->p_context->width > 0 &&
567 p_sys->p_context->height > 0 )
569 /* Reparse it to not drop the I frame */
570 b_null_size = VLC_FALSE;
571 p_sys->p_context->hurry_up = 0;
572 i_used = avcodec_decode_video( p_sys->p_context, p_sys->p_ff_pic,
574 p_sys->p_buffer, p_sys->i_buffer );
579 msg_Warn( p_dec, "cannot decode one frame (%d bytes)",
581 block_Release( p_block );
584 else if( i_used > p_sys->i_buffer )
586 i_used = p_sys->i_buffer;
590 p_sys->i_buffer -= i_used;
591 p_sys->p_buffer += i_used;
593 /* Nothing to display */
596 if( i_used == 0 ) break;
600 /* Update frame late count (except when doing preroll) */
601 if( p_sys->i_pts && p_sys->i_pts <= mdate() &&
602 !(p_block->i_flags & BLOCK_FLAG_PREROLL) )
604 p_sys->i_late_frames++;
605 if( p_sys->i_late_frames == 1 )
606 p_sys->i_late_frames_start = mdate();
610 p_sys->i_late_frames = 0;
613 if( !b_drawpicture || !p_sys->p_ff_pic->linesize[0] )
615 /* Do not display the picture */
619 if( !p_sys->p_ff_pic->opaque )
621 /* Get a new picture */
622 p_pic = ffmpeg_NewPictBuf( p_dec, p_sys->p_context );
625 block_Release( p_block );
629 /* Fill p_picture_t from AVVideoFrame and do chroma conversion
631 ffmpeg_CopyPicture( p_dec, p_pic, p_sys->p_ff_pic );
635 p_pic = (picture_t *)p_sys->p_ff_pic->opaque;
639 if( p_sys->p_ff_pic->pts ) p_sys->i_pts = p_sys->p_ff_pic->pts;
641 /* Sanity check (seems to be needed for some streams ) */
642 if( p_sys->p_ff_pic->pict_type == FF_B_TYPE )
644 p_sys->b_has_b_frames = VLC_TRUE;
647 /* Send decoded frame to vout */
650 p_pic->date = p_sys->i_pts;
652 /* interpolate the next PTS */
653 if( p_sys->p_context->frame_rate > 0 )
655 p_sys->i_pts += I64C(1000000) *
656 (2 + p_sys->p_ff_pic->repeat_pict) *
657 p_sys->p_context->frame_rate_base /
658 (2 * p_sys->p_context->frame_rate);
661 if( p_sys->b_first_frame )
663 /* Hack to force display of still pictures */
664 p_sys->b_first_frame = VLC_FALSE;
665 p_pic->b_force = VLC_TRUE;
668 p_pic->i_nb_fields = 2 + p_sys->p_ff_pic->repeat_pict;
669 #if LIBAVCODEC_BUILD >= 4685
670 p_pic->b_progressive = !p_sys->p_ff_pic->interlaced_frame;
671 p_pic->b_top_field_first = p_sys->p_ff_pic->top_field_first;
678 p_dec->pf_vout_buffer_del( p_dec, p_pic );
682 block_Release( p_block );
686 /*****************************************************************************
687 * EndVideo: decoder destruction
688 *****************************************************************************
689 * This function is called when the thread ends after a sucessful
691 *****************************************************************************/
692 void E_(EndVideoDec)( decoder_t *p_dec )
694 decoder_sys_t *p_sys = p_dec->p_sys;
696 if( p_sys->p_ff_pic ) av_free( p_sys->p_ff_pic );
699 E_(ClosePostproc)( p_dec, p_sys->p_pp );
702 free( p_sys->p_buffer_orig );
705 /*****************************************************************************
706 * ffmpeg_CopyPicture: copy a picture from ffmpeg internal buffers to a
707 * picture_t structure (when not in direct rendering mode).
708 *****************************************************************************/
709 static void ffmpeg_CopyPicture( decoder_t *p_dec,
710 picture_t *p_pic, AVFrame *p_ff_pic )
712 decoder_sys_t *p_sys = p_dec->p_sys;
714 if( ffmpeg_PixFmtToChroma( p_sys->p_context->pix_fmt ) )
716 int i_plane, i_size, i_line;
717 uint8_t *p_dst, *p_src;
718 int i_src_stride, i_dst_stride;
721 if( p_sys->p_pp && p_sys->b_pp )
722 E_(PostprocPict)( p_dec, p_sys->p_pp, p_pic, p_ff_pic );
725 for( i_plane = 0; i_plane < p_pic->i_planes; i_plane++ )
727 p_src = p_ff_pic->data[i_plane];
728 p_dst = p_pic->p[i_plane].p_pixels;
729 i_src_stride = p_ff_pic->linesize[i_plane];
730 i_dst_stride = p_pic->p[i_plane].i_pitch;
732 i_size = __MIN( i_src_stride, i_dst_stride );
733 for( i_line = 0; i_line < p_pic->p[i_plane].i_visible_lines;
736 p_dec->p_vlc->pf_memcpy( p_dst, p_src, i_size );
737 p_src += i_src_stride;
738 p_dst += i_dst_stride;
747 /* we need to convert to I420 */
748 switch( p_sys->p_context->pix_fmt )
750 case PIX_FMT_YUV410P:
751 case PIX_FMT_YUV411P:
753 for( i = 0; i < p_pic->i_planes; i++ )
755 dest_pic.data[i] = p_pic->p[i].p_pixels;
756 dest_pic.linesize[i] = p_pic->p[i].i_pitch;
758 img_convert( &dest_pic, PIX_FMT_YUV420P,
759 (AVPicture *)p_ff_pic,
760 p_sys->p_context->pix_fmt,
761 p_sys->p_context->width,
762 p_sys->p_context->height );
765 msg_Err( p_dec, "don't know how to convert chroma %i",
766 p_sys->p_context->pix_fmt );
773 /*****************************************************************************
774 * ffmpeg_GetFrameBuf: callback used by ffmpeg to get a frame buffer.
775 *****************************************************************************
776 * It is used for direct rendering as well as to get the right PTS for each
777 * decoded picture (even in indirect rendering mode).
778 *****************************************************************************/
779 static int ffmpeg_GetFrameBuf( struct AVCodecContext *p_context,
782 decoder_t *p_dec = (decoder_t *)p_context->opaque;
783 decoder_sys_t *p_sys = p_dec->p_sys;
786 /* Set picture PTS */
787 if( p_sys->input_pts )
789 p_ff_pic->pts = p_sys->input_pts;
791 else if( p_sys->input_dts )
793 /* Some demuxers only set the dts so let's try to find a useful
794 * timestamp from this */
795 if( !p_context->has_b_frames || !p_sys->b_has_b_frames ||
796 !p_ff_pic->reference || !p_sys->i_pts )
798 p_ff_pic->pts = p_sys->input_dts;
800 else p_ff_pic->pts = 0;
802 else p_ff_pic->pts = 0;
804 if( p_sys->i_pts ) /* make sure 1st frame has a pts > 0 */
806 p_sys->input_pts = p_sys->input_dts = 0;
809 p_ff_pic->opaque = 0;
811 /* Not much to do in indirect rendering mode */
812 if( !p_sys->b_direct_rendering || p_sys->b_pp )
814 return avcodec_default_get_buffer( p_context, p_ff_pic );
817 /* Some codecs set pix_fmt only after the 1st frame has been decoded,
818 * so this check is necessary. */
819 if( !ffmpeg_PixFmtToChroma( p_context->pix_fmt ) ||
820 p_sys->p_context->width % 16 || p_sys->p_context->height % 16 )
822 msg_Dbg( p_dec, "disabling direct rendering" );
823 p_sys->b_direct_rendering = 0;
824 return avcodec_default_get_buffer( p_context, p_ff_pic );
827 /* Get a new picture */
828 //p_sys->p_vout->render.b_allow_modify_pics = 0;
829 p_pic = ffmpeg_NewPictBuf( p_dec, p_sys->p_context );
832 p_sys->b_direct_rendering = 0;
833 return avcodec_default_get_buffer( p_context, p_ff_pic );
835 p_sys->p_context->draw_horiz_band = NULL;
837 p_ff_pic->opaque = (void*)p_pic;
838 p_ff_pic->type = FF_BUFFER_TYPE_USER;
839 p_ff_pic->data[0] = p_pic->p[0].p_pixels;
840 p_ff_pic->data[1] = p_pic->p[1].p_pixels;
841 p_ff_pic->data[2] = p_pic->p[2].p_pixels;
842 p_ff_pic->data[3] = NULL; /* alpha channel but I'm not sure */
844 p_ff_pic->linesize[0] = p_pic->p[0].i_pitch;
845 p_ff_pic->linesize[1] = p_pic->p[1].i_pitch;
846 p_ff_pic->linesize[2] = p_pic->p[2].i_pitch;
847 p_ff_pic->linesize[3] = 0;
849 if( p_ff_pic->reference != 0 )
851 p_dec->pf_picture_link( p_dec, p_pic );
854 /* FIXME what is that, should give good value */
855 p_ff_pic->age = 256*256*256*64; // FIXME FIXME from ffmpeg
860 static void ffmpeg_ReleaseFrameBuf( struct AVCodecContext *p_context,
863 decoder_t *p_dec = (decoder_t *)p_context->opaque;
866 if( !p_ff_pic->opaque )
868 avcodec_default_release_buffer( p_context, p_ff_pic );
872 p_pic = (picture_t*)p_ff_pic->opaque;
874 p_ff_pic->data[0] = NULL;
875 p_ff_pic->data[1] = NULL;
876 p_ff_pic->data[2] = NULL;
877 p_ff_pic->data[3] = NULL;
879 if( p_ff_pic->reference != 0 )
881 p_dec->pf_picture_unlink( p_dec, p_pic );