/*****************************************************************************
* 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->opaque,
p_ff_pic->data[3] );
}
else if( FindVlcChroma( p_sys->p_context->pix_fmt ) )
{
int i_plane, i_size, i_line;
uint8_t *p_dst, *p_src;
int i_src_stride, i_dst_stride;
if( p_sys->p_context->pix_fmt == PIX_FMT_PAL8 )
{
if( !p_pic->format.p_palette )
p_pic->format.p_palette = calloc( 1, sizeof(video_palette_t) );
if( p_pic->format.p_palette )
{
p_pic->format.p_palette->i_entries = AVPALETTE_COUNT;
memcpy( p_pic->format.p_palette->palette, p_ff_pic->data[1], AVPALETTE_SIZE );
}
}
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++ )
{
memcpy( p_dst, p_src, i_size );
p_src += i_src_stride;
p_dst += i_dst_stride;
}
}
}
else
{
const char *name = av_get_pix_fmt_name( p_sys->p_context->pix_fmt );
msg_Err( p_dec, "Unsupported decoded output format %d (%s)",
p_sys->p_context->pix_fmt, name ? name : "unknown" );
p_dec->b_error = 1;
}
}
/*****************************************************************************
* 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( FindVlcChroma( p_sys->p_context->pix_fmt ) )
{
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++ )
{
memcpy( p_dst, p_src, i_size );
p_src += i_src_stride;
p_dst += i_dst_stride;
}
}
}
else
{
const char *name = av_get_pix_fmt_name( p_sys->p_context->pix_fmt );
msg_Err( p_dec, "Unsupported decoded output format %d (%s)",
p_sys->p_context->pix_fmt, name ? name : "unknown" );
p_dec->b_error = 1;
}
}
/*****************************************************************************
* 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;
}
}
/*****************************************************************************
* DecodeVideo: Called to decode one or more frames
*****************************************************************************/
static 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;
block_t *p_block;
if( !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 )
OpenVideoCodec( p_dec );
}
p_block = *pp_block;
if(!p_block && !(p_sys->p_codec->capabilities & CODEC_CAP_DELAY) )
return NULL;
if( p_sys->b_delayed_open )
{
if( p_block )
block_Release( p_block );
return NULL;
}
if( p_block)
{
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;
post_mt( p_sys );
if( p_block->i_flags & BLOCK_FLAG_DISCONTINUITY )
avcodec_flush_buffers( p_context );
wait_mt( p_sys );
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 )
{
p_sys->i_pts = VLC_TS_INVALID; /* To make sure we recover properly */
}
if( p_block )
block_Release( p_block );
p_sys->i_late_frames--;
msg_Err( p_dec, "more than 5 seconds of late video -> "
"dropping frame (computer too slow ?)" );
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 */
if( p_block )
block_Release( p_block );
msg_Warn( p_dec, "More than 4 late frames, dropping frame" );
return NULL;
}
}
else
{
if( p_sys->b_hurry_up )
p_context->skip_frame = p_sys->i_skip_frame;
if( !p_block || !(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;
}
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 libavcodec requires a little more bytes
* that the real frame size */
if( p_block && 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 || p_block->i_buffer > 0 || p_sys->b_flush )
{
int i_used, b_gotpicture;
AVPacket pkt;
AVFrame *frame = av_frame_alloc();
if (unlikely(frame == NULL))
{
p_dec->b_error = true;
break;
}
post_mt( p_sys );
av_init_packet( &pkt );
if( p_block )
{
pkt.data = p_block->p_buffer;
pkt.size = p_block->i_buffer;
pkt.pts = p_block->i_pts;
pkt.dts = p_block->i_dts;
}
else
{
/* Return delayed frames if codec has CODEC_CAP_DELAY */
pkt.data = NULL;
pkt.size = 0;
}
if( !p_sys->palette_sent )
{
uint8_t *pal = av_packet_new_side_data(&pkt, AV_PKT_DATA_PALETTE, AVPALETTE_SIZE);
if (pal) {
memcpy(pal, p_dec->fmt_in.video.p_palette->palette, AVPALETTE_SIZE);
p_sys->palette_sent = true;
}
}
/* Make sure we don't reuse the same timestamps twice */
if( p_block )
{
p_block->i_pts =
p_block->i_dts = VLC_TS_INVALID;
}
i_used = avcodec_decode_video2( p_context, frame, &b_gotpicture,
&pkt );
av_free_packet( &pkt );
wait_mt( p_sys );
if( p_sys->b_flush )
p_sys->b_first_frame = true;
if( p_block )
{
if( p_block->i_buffer <= 0 )
p_sys->b_flush = false;
if( i_used < 0 )
{
av_frame_unref(frame);
if( b_drawpicture )
msg_Warn( p_dec, "cannot decode one frame (%zu bytes)",
p_block->i_buffer );
break;
}
else if( (unsigned)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 )
{
av_frame_unref(frame);
if( i_used == 0 ) break;
continue;
}
/* Compute the PTS */
mtime_t i_pts = frame->pkt_pts;
if (i_pts <= VLC_TS_INVALID)
i_pts = frame->pkt_dts;
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 += CLOCK_FREQ * (2 + frame->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 += CLOCK_FREQ * (2 + frame->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 || !(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 && !frame->linesize[0] ) )
{
av_frame_unref(frame);
continue;
}
picture_t *p_pic = frame->opaque;
if( p_pic == NULL )
{
/* Get a new picture */
if( p_sys->p_va == NULL )
p_pic = ffmpeg_NewPictBuf( p_dec, p_context );
if( !p_pic )
{
av_frame_unref(frame);
break;
}
/* Fill picture_t from AVFrame */
lavc_CopyPicture(p_dec, p_pic, frame);
}
else
{
if( p_sys->p_va != NULL )
vlc_va_Extract( p_sys->p_va, p_pic, frame->data[3] );
picture_Hold( 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;
}
}
p_pic->date = i_pts;
/* Hack to force display of still pictures */
p_pic->b_force = p_sys->b_first_frame;
p_pic->i_nb_fields = 2 + frame->repeat_pict;
p_pic->b_progressive = !frame->interlaced_frame;
p_pic->b_top_field_first = frame->top_field_first;
av_frame_unref(frame);
/* Send decoded frame to vout */
if (i_pts > VLC_TS_INVALID)
{
p_sys->b_first_frame = false;
return p_pic;
}
else
picture_Release( p_pic );
}
if( p_block )
block_Release( p_block );
return NULL;
}
