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vlc/modules/codec/avcodec/video.c

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/*****************************************************************************
* video.c: video decoder using the ffmpeg library
*****************************************************************************
* Copyright (C) 1999-2001 the VideoLAN team
* $Id$
*
* Authors: Laurent Aimar <fenrir@via.ecp.fr>
* Gildas Bazin <gbazin@videolan.org>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
*****************************************************************************/
/*****************************************************************************
* Preamble
*****************************************************************************/
#ifdef HAVE_CONFIG_H
# include "config.h"
#endif
#include <vlc_common.h>
#include <vlc_codec.h>
#include <vlc_avcodec.h>
#include <vlc_cpu.h>
#include <assert.h>
/* ffmpeg header */
#ifdef HAVE_LIBAVCODEC_AVCODEC_H
# include <libavcodec/avcodec.h>
# ifdef HAVE_AVCODEC_VAAPI
# include <libavcodec/vaapi.h>
# endif
# ifdef HAVE_AVCODEC_DXVA2
# include <libavcodec/dxva2.h>
# endif
#elif defined(HAVE_FFMPEG_AVCODEC_H)
# include <ffmpeg/avcodec.h>
#else
# include <avcodec.h>
#endif
#include "avcodec.h"
#include "va.h"
#if defined(HAVE_AVCODEC_VAAPI) || defined(HAVE_AVCODEC_DXVA2)
# define HAVE_AVCODEC_VA
#endif
/*****************************************************************************
* decoder_sys_t : decoder descriptor
*****************************************************************************/
struct decoder_sys_t
{
AVCODEC_COMMON_MEMBERS
/* Video decoder specific part */
mtime_t i_pts;
AVFrame *p_ff_pic;
/* for frame skipping algo */
bool b_hurry_up;
enum AVDiscard i_skip_frame;
enum AVDiscard i_skip_idct;
/* how many decoded frames are late */
int i_late_frames;
mtime_t i_late_frames_start;
/* for direct rendering */
bool b_direct_rendering;
int i_direct_rendering_used;
bool b_has_b_frames;
/* Hack to force display of still pictures */
bool b_first_frame;
/* */
AVPaletteControl palette;
/* */
bool b_flush;
/* VA API */
vlc_va_t *p_va;
vlc_sem_t sem_mt;
};
#ifdef HAVE_AVCODEC_MT
# define wait_mt(s) vlc_sem_wait( &s->sem_mt )
# define post_mt(s) vlc_sem_post( &s->sem_mt )
#else
# define wait_mt(s)
# define post_mt(s)
#endif
/* FIXME (dummy palette for now) */
static const AVPaletteControl palette_control;
/*****************************************************************************
* Local prototypes
*****************************************************************************/
static void ffmpeg_InitCodec ( decoder_t * );
static void ffmpeg_CopyPicture ( decoder_t *, picture_t *, AVFrame * );
static int ffmpeg_GetFrameBuf ( struct AVCodecContext *, AVFrame * );
static int ffmpeg_ReGetFrameBuf( struct AVCodecContext *, AVFrame * );
static void ffmpeg_ReleaseFrameBuf( struct AVCodecContext *, AVFrame * );
#ifdef HAVE_AVCODEC_VA
static enum PixelFormat ffmpeg_GetFormat( AVCodecContext *,
const enum PixelFormat * );
#endif
static uint32_t ffmpeg_CodecTag( vlc_fourcc_t fcc )
{
uint8_t *p = (uint8_t*)&fcc;
return p[0] | (p[1] << 8) | (p[2] << 16) | (p[3] << 24);
}
/*****************************************************************************
* Local Functions
*****************************************************************************/
/* Returns a new picture buffer */
static inline picture_t *ffmpeg_NewPictBuf( decoder_t *p_dec,
AVCodecContext *p_context )
{
decoder_sys_t *p_sys = p_dec->p_sys;
p_dec->fmt_out.video.i_width = p_context->width;
p_dec->fmt_out.video.i_height = p_context->height;
if( !p_context->width || !p_context->height )
{
return NULL; /* invalid display size */
}
if( !p_sys->p_va && GetVlcChroma( &p_dec->fmt_out.video, p_context->pix_fmt ) )
{
/* we are doomed, but not really, because most codecs set their pix_fmt
* much later
* FIXME does it make sense here ? */
p_dec->fmt_out.video.i_chroma = VLC_CODEC_I420;
}
p_dec->fmt_out.i_codec = p_dec->fmt_out.video.i_chroma;
/* If an aspect-ratio was specified in the input format then force it */
if( p_dec->fmt_in.video.i_sar_num > 0 && p_dec->fmt_in.video.i_sar_den > 0 )
{
p_dec->fmt_out.video.i_sar_num = p_dec->fmt_in.video.i_sar_num;
p_dec->fmt_out.video.i_sar_den = p_dec->fmt_in.video.i_sar_den;
}
else
{
p_dec->fmt_out.video.i_sar_num = p_context->sample_aspect_ratio.num;
p_dec->fmt_out.video.i_sar_den = p_context->sample_aspect_ratio.den;
if( !p_dec->fmt_out.video.i_sar_num || !p_dec->fmt_out.video.i_sar_den )
{
p_dec->fmt_out.video.i_sar_num = 1;
p_dec->fmt_out.video.i_sar_den = 1;
}
}
if( p_dec->fmt_in.video.i_frame_rate > 0 &&
p_dec->fmt_in.video.i_frame_rate_base > 0 )
{
p_dec->fmt_out.video.i_frame_rate =
p_dec->fmt_in.video.i_frame_rate;
p_dec->fmt_out.video.i_frame_rate_base =
p_dec->fmt_in.video.i_frame_rate_base;
}
else if( p_context->time_base.num > 0 && p_context->time_base.den > 0 )
{
p_dec->fmt_out.video.i_frame_rate = p_context->time_base.den;
p_dec->fmt_out.video.i_frame_rate_base = p_context->time_base.num;
}
return decoder_NewPicture( p_dec );
}
/*****************************************************************************
* InitVideo: initialize the video decoder
*****************************************************************************
* the ffmpeg codec will be opened, some memory allocated. The vout is not yet
* opened (done after the first decoded frame).
*****************************************************************************/
int InitVideoDec( decoder_t *p_dec, AVCodecContext *p_context,
AVCodec *p_codec, int i_codec_id, const char *psz_namecodec )
{
decoder_sys_t *p_sys;
int i_val;
/* Allocate the memory needed to store the decoder's structure */
if( ( p_dec->p_sys = p_sys = calloc( 1, sizeof(decoder_sys_t) ) ) == NULL )
return VLC_ENOMEM;
p_codec->type = AVMEDIA_TYPE_VIDEO;
p_context->codec_type = AVMEDIA_TYPE_VIDEO;
p_context->codec_id = i_codec_id;
p_sys->p_context = p_context;
p_sys->p_codec = p_codec;
p_sys->i_codec_id = i_codec_id;
p_sys->psz_namecodec = psz_namecodec;
p_sys->p_ff_pic = avcodec_alloc_frame();
p_sys->b_delayed_open = true;
p_sys->p_va = NULL;
vlc_sem_init( &p_sys->sem_mt, 0 );
/* ***** Fill p_context with init values ***** */
p_sys->p_context->codec_tag = ffmpeg_CodecTag( p_dec->fmt_in.i_original_fourcc ?: p_dec->fmt_in.i_codec );
/* ***** Get configuration of ffmpeg plugin ***** */
p_sys->p_context->workaround_bugs =
var_InheritInteger( p_dec, "ffmpeg-workaround-bugs" );
p_sys->p_context->error_recognition =
var_InheritInteger( p_dec, "ffmpeg-error-resilience" );
if( var_CreateGetBool( p_dec, "grayscale" ) )
p_sys->p_context->flags |= CODEC_FLAG_GRAY;
i_val = var_CreateGetInteger( p_dec, "ffmpeg-vismv" );
if( i_val ) p_sys->p_context->debug_mv = i_val;
i_val = var_CreateGetInteger( p_dec, "ffmpeg-lowres" );
if( i_val > 0 && i_val <= 2 ) p_sys->p_context->lowres = i_val;
i_val = var_CreateGetInteger( p_dec, "ffmpeg-skiploopfilter" );
if( i_val >= 4 ) p_sys->p_context->skip_loop_filter = AVDISCARD_ALL;
else if( i_val == 3 ) p_sys->p_context->skip_loop_filter = AVDISCARD_NONKEY;
else if( i_val == 2 ) p_sys->p_context->skip_loop_filter = AVDISCARD_BIDIR;
else if( i_val == 1 ) p_sys->p_context->skip_loop_filter = AVDISCARD_NONREF;
if( var_CreateGetBool( p_dec, "ffmpeg-fast" ) )
p_sys->p_context->flags2 |= CODEC_FLAG2_FAST;
/* ***** ffmpeg frame skipping ***** */
p_sys->b_hurry_up = var_CreateGetBool( p_dec, "ffmpeg-hurry-up" );
switch( var_CreateGetInteger( p_dec, "ffmpeg-skip-frame" ) )
{
case -1:
p_sys->p_context->skip_frame = AVDISCARD_NONE;
break;
case 0:
p_sys->p_context->skip_frame = AVDISCARD_DEFAULT;
break;
case 1:
p_sys->p_context->skip_frame = AVDISCARD_NONREF;
break;
case 2:
p_sys->p_context->skip_frame = AVDISCARD_NONKEY;
break;
case 3:
p_sys->p_context->skip_frame = AVDISCARD_ALL;
break;
default:
p_sys->p_context->skip_frame = AVDISCARD_NONE;
break;
}
p_sys->i_skip_frame = p_sys->p_context->skip_frame;
switch( var_CreateGetInteger( p_dec, "ffmpeg-skip-idct" ) )
{
case -1:
p_sys->p_context->skip_idct = AVDISCARD_NONE;
break;
case 0:
p_sys->p_context->skip_idct = AVDISCARD_DEFAULT;
break;
case 1:
p_sys->p_context->skip_idct = AVDISCARD_NONREF;
break;
case 2:
p_sys->p_context->skip_idct = AVDISCARD_NONKEY;
break;
case 3:
p_sys->p_context->skip_idct = AVDISCARD_ALL;
break;
default:
p_sys->p_context->skip_idct = AVDISCARD_NONE;
break;
}
p_sys->i_skip_idct = p_sys->p_context->skip_idct;
/* ***** ffmpeg direct rendering ***** */
p_sys->b_direct_rendering = false;
p_sys->i_direct_rendering_used = -1;
if( var_CreateGetBool( p_dec, "ffmpeg-dr" ) &&
(p_sys->p_codec->capabilities & CODEC_CAP_DR1) &&
/* No idea why ... but this fixes flickering on some TSCC streams */
p_sys->i_codec_id != CODEC_ID_TSCC &&
#if (LIBAVCODEC_VERSION_INT >= AV_VERSION_INT( 52, 68, 2 ) ) && (LIBAVCODEC_VERSION_INT < AV_VERSION_INT( 52, 100, 1 ) )
/* avcodec native vp8 decode doesn't handle EMU_EDGE flag, and I
don't have idea howto implement fallback to libvpx decoder */
p_sys->i_codec_id != CODEC_ID_VP8 &&
#endif
!p_sys->p_context->debug_mv )
{
/* Some codecs set pix_fmt only after the 1st frame has been decoded,
* so we need to do another check in ffmpeg_GetFrameBuf() */
p_sys->b_direct_rendering = true;
}
/* ffmpeg doesn't properly release old pictures when frames are skipped */
//if( p_sys->b_hurry_up ) p_sys->b_direct_rendering = false;
if( p_sys->b_direct_rendering )
{
msg_Dbg( p_dec, "trying to use direct rendering" );
p_sys->p_context->flags |= CODEC_FLAG_EMU_EDGE;
}
else
{
msg_Dbg( p_dec, "direct rendering is disabled" );
}
/* Always use our get_buffer wrapper so we can calculate the
* PTS correctly */
p_sys->p_context->get_buffer = ffmpeg_GetFrameBuf;
p_sys->p_context->reget_buffer = ffmpeg_ReGetFrameBuf;
p_sys->p_context->release_buffer = ffmpeg_ReleaseFrameBuf;
p_sys->p_context->opaque = p_dec;
#ifdef HAVE_AVCODEC_MT
int i_thread_count = var_InheritInteger( p_dec, "ffmpeg-threads" );
if( i_thread_count <= 0 )
i_thread_count = vlc_GetCPUCount();
msg_Dbg( p_dec, "allowing %d thread(s) for decoding", i_thread_count );
p_sys->p_context->thread_count = i_thread_count;
#endif
#ifdef HAVE_AVCODEC_VA
const bool b_use_hw = var_CreateGetBool( p_dec, "ffmpeg-hw" );
if( b_use_hw &&
(i_codec_id == CODEC_ID_MPEG1VIDEO || i_codec_id == CODEC_ID_MPEG2VIDEO ||
i_codec_id == CODEC_ID_MPEG4 ||
i_codec_id == CODEC_ID_H264 ||
i_codec_id == CODEC_ID_VC1 || i_codec_id == CODEC_ID_WMV3) )
{
#ifdef HAVE_AVCODEC_MT
if( p_sys->p_context->thread_type & FF_THREAD_FRAME )
{
msg_Warn( p_dec, "threaded frame decoding is not compatible with ffmpeg-hw, disabled" );
p_sys->p_context->thread_type &= ~FF_THREAD_FRAME;
}
#endif
p_sys->p_context->get_format = ffmpeg_GetFormat;
}
#endif
/* ***** misc init ***** */
p_sys->i_pts = VLC_TS_INVALID;
p_sys->b_has_b_frames = false;
p_sys->b_first_frame = true;
p_sys->b_flush = false;
p_sys->i_late_frames = 0;
/* Set output properties */
p_dec->fmt_out.i_cat = VIDEO_ES;
if( GetVlcChroma( &p_dec->fmt_out.video, p_context->pix_fmt ) != VLC_SUCCESS )
{
/* we are doomed. but not really, because most codecs set their pix_fmt later on */
p_dec->fmt_out.i_codec = VLC_CODEC_I420;
}
p_dec->fmt_out.i_codec = p_dec->fmt_out.video.i_chroma;
/* Setup palette */
memset( &p_sys->palette, 0, sizeof(p_sys->palette) );
if( p_dec->fmt_in.video.p_palette )
{
p_sys->palette.palette_changed = 1;
for( int i = 0; i < __MIN( AVPALETTE_COUNT, p_dec->fmt_in.video.p_palette->i_entries ); i++ )
{
union {
uint32_t u;
uint8_t a[4];
} c;
c.a[0] = p_dec->fmt_in.video.p_palette->palette[i][0];
c.a[1] = p_dec->fmt_in.video.p_palette->palette[i][1];
c.a[2] = p_dec->fmt_in.video.p_palette->palette[i][2];
c.a[3] = p_dec->fmt_in.video.p_palette->palette[i][3];
p_sys->palette.palette[i] = c.u;
}
p_sys->p_context->palctrl = &p_sys->palette;
p_dec->fmt_out.video.p_palette = malloc( sizeof(video_palette_t) );
if( p_dec->fmt_out.video.p_palette )
*p_dec->fmt_out.video.p_palette = *p_dec->fmt_in.video.p_palette;
}
else if( p_sys->i_codec_id != CODEC_ID_MSVIDEO1 && p_sys->i_codec_id != CODEC_ID_CINEPAK )
{
p_sys->p_context->palctrl = &p_sys->palette;
}
/* ***** init this codec with special data ***** */
ffmpeg_InitCodec( p_dec );
/* ***** Open the codec ***** */
if( ffmpeg_OpenCodec( p_dec ) < 0 )
{
msg_Err( p_dec, "cannot open codec (%s)", p_sys->psz_namecodec );
av_free( p_sys->p_ff_pic );
vlc_sem_destroy( &p_sys->sem_mt );
free( p_sys );
return VLC_EGENERIC;
}
return VLC_SUCCESS;
}
/*****************************************************************************
* DecodeVideo: Called to decode one or more frames
*****************************************************************************/
picture_t *DecodeVideo( decoder_t *p_dec, block_t **pp_block )
{
decoder_sys_t *p_sys = p_dec->p_sys;
AVCodecContext *p_context = p_sys->p_context;
int b_drawpicture;
int b_null_size = false;
block_t *p_block;
if( !pp_block || !*pp_block )
return NULL;
if( !p_context->extradata_size && p_dec->fmt_in.i_extra )
{
ffmpeg_InitCodec( p_dec );
if( p_sys->b_delayed_open )
{
if( ffmpeg_OpenCodec( p_dec ) )
msg_Err( p_dec, "cannot open codec (%s)", p_sys->psz_namecodec );
}
}
p_block = *pp_block;
if( p_sys->b_delayed_open )
{
block_Release( p_block );
return NULL;
}
if( p_block->i_flags & (BLOCK_FLAG_DISCONTINUITY|BLOCK_FLAG_CORRUPTED) )
{
p_sys->i_pts = VLC_TS_INVALID; /* To make sure we recover properly */
p_sys->i_late_frames = 0;
if( p_block->i_flags & BLOCK_FLAG_DISCONTINUITY )
avcodec_flush_buffers( p_context );
block_Release( p_block );
return NULL;
}
if( p_block->i_flags & BLOCK_FLAG_PREROLL )
{
/* Do not care about late frames when prerolling
* TODO avoid decoding of non reference frame
* (ie all B except for H264 where it depends only on nal_ref_idc) */
p_sys->i_late_frames = 0;
}
if( !p_dec->b_pace_control && (p_sys->i_late_frames > 0) &&
(mdate() - p_sys->i_late_frames_start > INT64_C(5000000)) )
{
if( p_sys->i_pts > VLC_TS_INVALID )
{
msg_Err( p_dec, "more than 5 seconds of late video -> "
"dropping frame (computer too slow ?)" );
p_sys->i_pts = VLC_TS_INVALID; /* To make sure we recover properly */
}
block_Release( p_block );
p_sys->i_late_frames--;
return NULL;
}
/* A good idea could be to decode all I pictures and see for the other */
if( !p_dec->b_pace_control &&
p_sys->b_hurry_up &&
(p_sys->i_late_frames > 4) )
{
b_drawpicture = 0;
if( p_sys->i_late_frames < 12 )
{
p_context->skip_frame =
(p_sys->i_skip_frame <= AVDISCARD_NONREF) ?
AVDISCARD_NONREF : p_sys->i_skip_frame;
}
else
{
/* picture too late, won't decode
* but break picture until a new I, and for mpeg4 ...*/
p_sys->i_late_frames--; /* needed else it will never be decrease */
block_Release( p_block );
return NULL;
}
}
else
{
if( p_sys->b_hurry_up )
p_context->skip_frame = p_sys->i_skip_frame;
if( !(p_block->i_flags & BLOCK_FLAG_PREROLL) )
b_drawpicture = 1;
else
b_drawpicture = 0;
}
if( p_context->width <= 0 || p_context->height <= 0 )
{
if( p_sys->b_hurry_up )
p_context->skip_frame = p_sys->i_skip_frame;
b_null_size = true;
}
else if( !b_drawpicture )
{
/* It creates broken picture
* FIXME either our parser or ffmpeg is broken */
#if 0
if( p_sys->b_hurry_up )
p_context->skip_frame = __MAX( p_context->skip_frame,
AVDISCARD_NONREF );
#endif
}
/*
* Do the actual decoding now */
/* Don't forget that ffmpeg requires a little more bytes
* that the real frame size */
if( p_block->i_buffer > 0 )
{
p_sys->b_flush = ( p_block->i_flags & BLOCK_FLAG_END_OF_SEQUENCE ) != 0;
p_block = block_Realloc( p_block, 0,
p_block->i_buffer + FF_INPUT_BUFFER_PADDING_SIZE );
if( !p_block )
return NULL;
p_block->i_buffer -= FF_INPUT_BUFFER_PADDING_SIZE;
*pp_block = p_block;
memset( p_block->p_buffer + p_block->i_buffer, 0,
FF_INPUT_BUFFER_PADDING_SIZE );
}
while( p_block->i_buffer > 0 || p_sys->b_flush )
{
int i_used, b_gotpicture;
picture_t *p_pic;
AVPacket pkt;
/* Set the PTS/DTS in the context reordered_opaque field */
if( p_block->i_pts > VLC_TS_INVALID )
p_context->reordered_opaque = (p_block->i_pts << 1) | 0;
else if( p_block->i_dts > VLC_TS_INVALID )
p_context->reordered_opaque = (p_block->i_dts << 1) | 1;
else
p_context->reordered_opaque = INT64_MIN;
p_sys->p_ff_pic->reordered_opaque = p_context->reordered_opaque;
/* Make sure we don't reuse the same timestamps twice */
p_block->i_pts =
p_block->i_dts = VLC_TS_INVALID;
post_mt( p_sys );
av_init_packet( &pkt );
pkt.data = p_block->p_buffer;
pkt.size = p_block->i_buffer;
i_used = avcodec_decode_video2( p_context, p_sys->p_ff_pic,
&b_gotpicture, &pkt );
if( b_null_size && !p_sys->b_flush &&
p_context->width > 0 && p_context->height > 0 )
{
/* Reparse it to not drop the I frame */
b_null_size = false;
if( p_sys->b_hurry_up )
p_context->skip_frame = p_sys->i_skip_frame;
i_used = avcodec_decode_video2( p_context, p_sys->p_ff_pic,
&b_gotpicture, &pkt );
}
wait_mt( p_sys );
if( p_sys->b_flush )
p_sys->b_first_frame = true;
if( p_block->i_buffer <= 0 )
p_sys->b_flush = false;
if( i_used < 0 )
{
if( b_drawpicture )
msg_Warn( p_dec, "cannot decode one frame (%zu bytes)",
p_block->i_buffer );
block_Release( p_block );
return NULL;
}
else if( i_used > p_block->i_buffer ||
p_context->thread_count > 1 )
{
i_used = p_block->i_buffer;
}
/* Consumed bytes */
p_block->i_buffer -= i_used;
p_block->p_buffer += i_used;
/* Nothing to display */
if( !b_gotpicture )
{
if( i_used == 0 ) break;
continue;
}
/* Sanity check (seems to be needed for some streams) */
if( p_sys->p_ff_pic->pict_type == FF_B_TYPE )
{
p_sys->b_has_b_frames = true;
}
/* Compute the PTS */
mtime_t i_pts = VLC_TS_INVALID;
if( p_sys->p_ff_pic->reordered_opaque != INT64_MIN )
{
mtime_t i_ts = p_sys->p_ff_pic->reordered_opaque >> 1;
bool b_dts = p_sys->p_ff_pic->reordered_opaque & 1;
if( b_dts )
{
if( !p_context->has_b_frames ||
!p_sys->b_has_b_frames ||
!p_sys->p_ff_pic->reference ||
p_sys->i_pts <= VLC_TS_INVALID )
i_pts = i_ts;
/* Guess what ? The rules are different for Real Video :( */
if( (p_dec->fmt_in.i_codec == VLC_CODEC_RV30 ||
p_dec->fmt_in.i_codec == VLC_CODEC_RV40) &&
p_sys->b_has_b_frames )
{
i_pts = VLC_TS_INVALID;
if(p_sys->p_ff_pic->reference) i_pts = i_ts;
}
}
else
{
i_pts = i_ts;
}
}
if( i_pts <= VLC_TS_INVALID )
i_pts = p_sys->i_pts;
/* Interpolate the next PTS */
if( i_pts > VLC_TS_INVALID )
p_sys->i_pts = i_pts;
if( p_sys->i_pts > VLC_TS_INVALID )
{
/* interpolate the next PTS */
if( p_dec->fmt_in.video.i_frame_rate > 0 &&
p_dec->fmt_in.video.i_frame_rate_base > 0 )
{
p_sys->i_pts += INT64_C(1000000) *
(2 + p_sys->p_ff_pic->repeat_pict) *
p_dec->fmt_in.video.i_frame_rate_base /
(2 * p_dec->fmt_in.video.i_frame_rate);
}
else if( p_context->time_base.den > 0 )
{
int i_tick = p_context->ticks_per_frame;
if( i_tick <= 0 )
i_tick = 1;
p_sys->i_pts += INT64_C(1000000) *
(2 + p_sys->p_ff_pic->repeat_pict) *
i_tick * p_context->time_base.num /
(2 * p_context->time_base.den);
}
}
/* Update frame late count (except when doing preroll) */
mtime_t i_display_date = 0;
if( !(p_block->i_flags & BLOCK_FLAG_PREROLL) )
i_display_date = decoder_GetDisplayDate( p_dec, i_pts );
if( i_display_date > 0 && i_display_date <= mdate() )
{
p_sys->i_late_frames++;
if( p_sys->i_late_frames == 1 )
p_sys->i_late_frames_start = mdate();
}
else
{
p_sys->i_late_frames = 0;
}
if( !b_drawpicture || ( !p_sys->p_va && !p_sys->p_ff_pic->linesize[0] ) )
continue;
if( !p_sys->p_ff_pic->opaque )
{
/* Get a new picture */
p_pic = ffmpeg_NewPictBuf( p_dec, p_context );
if( !p_pic )
{
block_Release( p_block );
return NULL;
}
/* Fill p_picture_t from AVVideoFrame and do chroma conversion
* if needed */
ffmpeg_CopyPicture( p_dec, p_pic, p_sys->p_ff_pic );
}
else
{
p_pic = (picture_t *)p_sys->p_ff_pic->opaque;
decoder_LinkPicture( p_dec, p_pic );
}
if( !p_dec->fmt_in.video.i_sar_num || !p_dec->fmt_in.video.i_sar_den )
{
/* Fetch again the aspect ratio in case it changed */
p_dec->fmt_out.video.i_sar_num
= p_context->sample_aspect_ratio.num;
p_dec->fmt_out.video.i_sar_den
= p_context->sample_aspect_ratio.den;
if( !p_dec->fmt_out.video.i_sar_num || !p_dec->fmt_out.video.i_sar_den )
{
p_dec->fmt_out.video.i_sar_num = 1;
p_dec->fmt_out.video.i_sar_den = 1;
}
}
/* Send decoded frame to vout */
if( i_pts > VLC_TS_INVALID)
{
p_pic->date = i_pts;
if( p_sys->b_first_frame )
{
/* Hack to force display of still pictures */
p_sys->b_first_frame = false;
p_pic->b_force = true;
}
p_pic->i_nb_fields = 2 + p_sys->p_ff_pic->repeat_pict;
p_pic->b_progressive = !p_sys->p_ff_pic->interlaced_frame;
p_pic->b_top_field_first = p_sys->p_ff_pic->top_field_first;
p_pic->i_qstride = p_sys->p_ff_pic->qstride;
int i_mb_h = ( p_pic->format.i_height + 15 ) / 16;
p_pic->p_q = malloc( p_pic->i_qstride * i_mb_h );
memcpy( p_pic->p_q, p_sys->p_ff_pic->qscale_table,
p_pic->i_qstride * i_mb_h );
switch( p_sys->p_ff_pic->qscale_type )
{
case FF_QSCALE_TYPE_MPEG1:
p_pic->i_qtype = QTYPE_MPEG1;
break;
case FF_QSCALE_TYPE_MPEG2:
p_pic->i_qtype = QTYPE_MPEG2;
break;
case FF_QSCALE_TYPE_H264:
p_pic->i_qtype = QTYPE_H264;
break;
}
return p_pic;
}
else
{
decoder_DeletePicture( p_dec, p_pic );
}
}
block_Release( p_block );
return NULL;
}
/*****************************************************************************
* EndVideo: decoder destruction
*****************************************************************************
* This function is called when the thread ends after a successful
* initialization.
*****************************************************************************/
void EndVideoDec( decoder_t *p_dec )
{
decoder_sys_t *p_sys = p_dec->p_sys;
post_mt( p_sys );
/* do not flush buffers if codec hasn't been opened (theora/vorbis/VC1) */
if( p_sys->p_context->codec )
avcodec_flush_buffers( p_sys->p_context );
wait_mt( p_sys );
if( p_sys->p_ff_pic ) av_free( p_sys->p_ff_pic );
if( p_sys->p_va )
{
vlc_va_Delete( p_sys->p_va );
p_sys->p_va = NULL;
}
vlc_sem_destroy( &p_sys->sem_mt );
}
/*****************************************************************************
* ffmpeg_InitCodec: setup codec extra initialization data for ffmpeg
*****************************************************************************/
static void ffmpeg_InitCodec( decoder_t *p_dec )
{
decoder_sys_t *p_sys = p_dec->p_sys;
int i_size = p_dec->fmt_in.i_extra;
if( !i_size ) return;
if( p_sys->i_codec_id == CODEC_ID_SVQ3 )
{
uint8_t *p;
p_sys->p_context->extradata_size = i_size + 12;
p = p_sys->p_context->extradata =
malloc( p_sys->p_context->extradata_size );
if( !p )
return;
memcpy( &p[0], "SVQ3", 4 );
memset( &p[4], 0, 8 );
memcpy( &p[12], p_dec->fmt_in.p_extra, i_size );
/* Now remove all atoms before the SMI one */
if( p_sys->p_context->extradata_size > 0x5a &&
strncmp( (char*)&p[0x56], "SMI ", 4 ) )
{
uint8_t *psz = &p[0x52];
while( psz < &p[p_sys->p_context->extradata_size - 8] )
{
int i_size = GetDWBE( psz );
if( i_size <= 1 )
{
/* FIXME handle 1 as long size */
break;
}
if( !strncmp( (char*)&psz[4], "SMI ", 4 ) )
{
memmove( &p[0x52], psz,
&p[p_sys->p_context->extradata_size] - psz );
break;
}
psz += i_size;
}
}
}
else
{
p_sys->p_context->extradata_size = i_size;
p_sys->p_context->extradata =
malloc( i_size + FF_INPUT_BUFFER_PADDING_SIZE );
if( p_sys->p_context->extradata )
{
memcpy( p_sys->p_context->extradata,
p_dec->fmt_in.p_extra, i_size );
memset( &((uint8_t*)p_sys->p_context->extradata)[i_size],
0, FF_INPUT_BUFFER_PADDING_SIZE );
}
}
}
/*****************************************************************************
* ffmpeg_CopyPicture: copy a picture from ffmpeg internal buffers to a
* picture_t structure (when not in direct rendering mode).
*****************************************************************************/
static void ffmpeg_CopyPicture( decoder_t *p_dec,
picture_t *p_pic, AVFrame *p_ff_pic )
{
decoder_sys_t *p_sys = p_dec->p_sys;
if( p_sys->p_va )
{
vlc_va_Extract( p_sys->p_va, p_pic, p_ff_pic );
}
else if( TestFfmpegChroma( p_sys->p_context->pix_fmt, -1 ) == VLC_SUCCESS )
{
int i_plane, i_size, i_line;
uint8_t *p_dst, *p_src;
int i_src_stride, i_dst_stride;
for( i_plane = 0; i_plane < p_pic->i_planes; i_plane++ )
{
p_src = p_ff_pic->data[i_plane];
p_dst = p_pic->p[i_plane].p_pixels;
i_src_stride = p_ff_pic->linesize[i_plane];
i_dst_stride = p_pic->p[i_plane].i_pitch;
i_size = __MIN( i_src_stride, i_dst_stride );
for( i_line = 0; i_line < p_pic->p[i_plane].i_visible_lines;
i_line++ )
{
vlc_memcpy( p_dst, p_src, i_size );
p_src += i_src_stride;
p_dst += i_dst_stride;
}
}
}
else
{
msg_Err( p_dec, "don't know how to convert chroma %i",
p_sys->p_context->pix_fmt );
p_dec->b_error = 1;
}
}
/*****************************************************************************
* ffmpeg_GetFrameBuf: callback used by ffmpeg to get a frame buffer.
*****************************************************************************
* It is used for direct rendering as well as to get the right PTS for each
* decoded picture (even in indirect rendering mode).
*****************************************************************************/
static int ffmpeg_GetFrameBuf( struct AVCodecContext *p_context,
AVFrame *p_ff_pic )
{
decoder_t *p_dec = (decoder_t *)p_context->opaque;
decoder_sys_t *p_sys = p_dec->p_sys;
picture_t *p_pic;
/* */
p_ff_pic->reordered_opaque = p_context->reordered_opaque;
p_ff_pic->opaque = NULL;
if( p_sys->p_va )
{
#ifdef HAVE_AVCODEC_VA
/* hwaccel_context is not present in old ffmpeg version */
if( vlc_va_Setup( p_sys->p_va,
&p_sys->p_context->hwaccel_context, &p_dec->fmt_out.video.i_chroma,
p_sys->p_context->width, p_sys->p_context->height ) )
{
msg_Err( p_dec, "vlc_va_Setup failed" );
return -1;
}
#else
assert(0);
#endif
/* */
p_ff_pic->type = FF_BUFFER_TYPE_USER;
/* FIXME what is that, should give good value */
p_ff_pic->age = 256*256*256*64; // FIXME FIXME from ffmpeg
if( vlc_va_Get( p_sys->p_va, p_ff_pic ) )
{
msg_Err( p_dec, "VaGrabSurface failed" );
return -1;
}
return 0;
}
else if( !p_sys->b_direct_rendering )
{
/* Not much to do in indirect rendering mode. */
return avcodec_default_get_buffer( p_context, p_ff_pic );
}
wait_mt( p_sys );
/* Some codecs set pix_fmt only after the 1st frame has been decoded,
* so we need to check for direct rendering again. */
int i_width = p_context->width;
int i_height = p_context->height;
avcodec_align_dimensions( p_context, &i_width, &i_height );
if( GetVlcChroma( &p_dec->fmt_out.video, p_context->pix_fmt ) != VLC_SUCCESS ||
p_context->pix_fmt == PIX_FMT_PAL8 )
goto no_dr;
p_dec->fmt_out.i_codec = p_dec->fmt_out.video.i_chroma;
/* Get a new picture */
p_pic = ffmpeg_NewPictBuf( p_dec, p_context );
if( !p_pic )
goto no_dr;
bool b_compatible = true;
if( p_pic->p[0].i_pitch / p_pic->p[0].i_pixel_pitch < i_width ||
p_pic->p[0].i_lines < i_height )
b_compatible = false;
for( int i = 0; i < p_pic->i_planes && b_compatible; i++ )
{
unsigned i_align;
switch( p_sys->i_codec_id )
{
case CODEC_ID_SVQ1:
case CODEC_ID_VP5:
case CODEC_ID_VP6:
case CODEC_ID_VP6F:
case CODEC_ID_VP6A:
i_align = 16;
break;
default:
i_align = i == 0 ? 16 : 8;
break;
}
if( p_pic->p[i].i_pitch % i_align )
b_compatible = false;
if( (intptr_t)p_pic->p[i].p_pixels % i_align )
b_compatible = false;
}
if( p_context->pix_fmt == PIX_FMT_YUV422P && b_compatible )
{
if( 2 * p_pic->p[1].i_pitch != p_pic->p[0].i_pitch ||
2 * p_pic->p[2].i_pitch != p_pic->p[0].i_pitch )
b_compatible = false;
}
if( !b_compatible )
{
decoder_DeletePicture( p_dec, p_pic );
goto no_dr;
}
if( p_sys->i_direct_rendering_used != 1 )
{
msg_Dbg( p_dec, "using direct rendering" );
p_sys->i_direct_rendering_used = 1;
}
p_context->draw_horiz_band = NULL;
p_ff_pic->opaque = (void*)p_pic;
p_ff_pic->type = FF_BUFFER_TYPE_USER;
p_ff_pic->data[0] = p_pic->p[0].p_pixels;
p_ff_pic->data[1] = p_pic->p[1].p_pixels;
p_ff_pic->data[2] = p_pic->p[2].p_pixels;
p_ff_pic->data[3] = NULL; /* alpha channel but I'm not sure */
p_ff_pic->linesize[0] = p_pic->p[0].i_pitch;
p_ff_pic->linesize[1] = p_pic->p[1].i_pitch;
p_ff_pic->linesize[2] = p_pic->p[2].i_pitch;
p_ff_pic->linesize[3] = 0;
/* FIXME what is that, should give good value */
p_ff_pic->age = 256*256*256*64; // FIXME FIXME from ffmpeg
post_mt( p_sys );
return 0;
no_dr:
if( p_sys->i_direct_rendering_used != 0 )
{
msg_Warn( p_dec, "disabling direct rendering" );
p_sys->i_direct_rendering_used = 0;
}
post_mt( p_sys );
return avcodec_default_get_buffer( p_context, p_ff_pic );
}
static int ffmpeg_ReGetFrameBuf( struct AVCodecContext *p_context, AVFrame *p_ff_pic )
{
p_ff_pic->reordered_opaque = p_context->reordered_opaque;
/* We always use default reget function, it works perfectly fine */
return avcodec_default_reget_buffer( p_context, p_ff_pic );
}
static void ffmpeg_ReleaseFrameBuf( struct AVCodecContext *p_context,
AVFrame *p_ff_pic )
{
decoder_t *p_dec = (decoder_t *)p_context->opaque;
decoder_sys_t *p_sys = p_dec->p_sys;
if( p_sys->p_va )
{
vlc_va_Release( p_sys->p_va, p_ff_pic );
}
else if( !p_ff_pic->opaque )
{
/* We can end up here without the AVFrame being allocated by
* avcodec_default_get_buffer() if VA is used and the frame is
* released when the decoder is closed
*/
if( p_ff_pic->type == FF_BUFFER_TYPE_INTERNAL )
avcodec_default_release_buffer( p_context, p_ff_pic );
}
else
{
picture_t *p_pic = (picture_t*)p_ff_pic->opaque;
decoder_UnlinkPicture( p_dec, p_pic );
}
for( int i = 0; i < 4; i++ )
p_ff_pic->data[i] = NULL;
}
#ifdef HAVE_AVCODEC_VA
static enum PixelFormat ffmpeg_GetFormat( AVCodecContext *p_codec,
const enum PixelFormat *pi_fmt )
{
decoder_t *p_dec = p_codec->opaque;
decoder_sys_t *p_sys = p_dec->p_sys;
if( p_sys->p_va )
{
vlc_va_Delete( p_sys->p_va );
p_sys->p_va = NULL;
}
/* Try too look for a supported hw acceleration */
for( int i = 0; pi_fmt[i] != PIX_FMT_NONE; i++ )
{
static const char *ppsz_name[PIX_FMT_NB] = {
[PIX_FMT_VDPAU_H264] = "PIX_FMT_VDPAU_H264",
[PIX_FMT_VAAPI_IDCT] = "PIX_FMT_VAAPI_IDCT",
[PIX_FMT_VAAPI_VLD] = "PIX_FMT_VAAPI_VLD",
[PIX_FMT_VAAPI_MOCO] = "PIX_FMT_VAAPI_MOCO",
#ifdef HAVE_AVCODEC_DXVA2
[PIX_FMT_DXVA2_VLD] = "PIX_FMT_DXVA2_VLD",
#endif
[PIX_FMT_YUYV422] = "PIX_FMT_YUYV422",
[PIX_FMT_YUV420P] = "PIX_FMT_YUV420P",
};
msg_Dbg( p_dec, "Available decoder output format %d (%s)", pi_fmt[i], ppsz_name[pi_fmt[i]] ?: "Unknown" );
/* Only VLD supported */
if( pi_fmt[i] == PIX_FMT_VAAPI_VLD )
{
if( !var_InheritBool( p_dec, "xlib" ) )
{
msg_Warn( p_dec, "Ignoring VA API" );
continue;
}
#ifdef HAVE_AVCODEC_VAAPI
msg_Dbg( p_dec, "Trying VA API" );
p_sys->p_va = vlc_va_NewVaapi( VLC_OBJECT(p_dec), p_sys->i_codec_id );
if( !p_sys->p_va )
msg_Warn( p_dec, "Failed to open VA API" );
#else
continue;
#endif
}
#ifdef HAVE_AVCODEC_DXVA2
if( pi_fmt[i] == PIX_FMT_DXVA2_VLD )
{
msg_Dbg( p_dec, "Trying DXVA2" );
p_sys->p_va = vlc_va_NewDxva2( VLC_OBJECT(p_dec), p_sys->i_codec_id );
if( !p_sys->p_va )
msg_Warn( p_dec, "Failed to open DXVA2" );
}
#endif
if( p_sys->p_va &&
p_sys->p_context->width > 0 && p_sys->p_context->height > 0 )
{
/* We try to call vlc_va_Setup when possible to detect errors when
* possible (later is too late) */
if( vlc_va_Setup( p_sys->p_va,
&p_sys->p_context->hwaccel_context,
&p_dec->fmt_out.video.i_chroma,
p_sys->p_context->width, p_sys->p_context->height ) )
{
msg_Err( p_dec, "vlc_va_Setup failed" );
vlc_va_Delete( p_sys->p_va );
p_sys->p_va = NULL;
}
}
if( p_sys->p_va )
{
if( p_sys->p_va->description )
msg_Info( p_dec, "Using %s for hardware decoding.", p_sys->p_va->description );
/* FIXME this will disabled direct rendering
* even if a new pixel format is renegociated
*/
p_sys->b_direct_rendering = false;
p_sys->p_context->draw_horiz_band = NULL;
return pi_fmt[i];
}
}
/* Fallback to default behaviour */
return avcodec_default_get_format( p_codec, pi_fmt );
}
#endif