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Commit 1e5b412a authored by Gildas Bazin's avatar Gildas Bazin
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* modules/packetizer/h264.c: modified ParseNALBlock() to return a complete... 

* modules/packetizer/h264.c: modified ParseNALBlock() to return a complete picture and not just a picture slice.
parent 685c349a
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Showing with 109 additions and 49 deletions
modules/packetizer/h264.c
View file @ 1e5b412a
......@@ -6,7 +6,7 @@
*
* Authors: Laurent Aimar <fenrir@via.ecp.fr>
* Eric Petit <titer@videolan.org>
* Gildas Bazin <gbazin@netcourrier.com>
* 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
......@@ -73,6 +73,15 @@ struct decoder_sys_t
/* avcC data */
int i_avcC_length_size;
/* Useful values of the Sequence Parameter Set */
int i_log2_max_frame_num;
int b_frame_mbs_only;
/* Useful values of the Slice Header */
int i_nal_type;
int i_idr_pic_id;
int i_frame_num;
};
enum
......@@ -119,7 +128,8 @@ static int Open( vlc_object_t *p_this )
p_dec->fmt_in.i_codec != VLC_FOURCC( 'H', '2', '6', '4') &&
p_dec->fmt_in.i_codec != VLC_FOURCC( 'V', 'S', 'S', 'H') &&
p_dec->fmt_in.i_codec != VLC_FOURCC( 'v', 's', 's', 'h') &&
( p_dec->fmt_in.i_codec != VLC_FOURCC( 'a', 'v', 'c', '1') || p_dec->fmt_in.i_extra < 7 ) )
( p_dec->fmt_in.i_codec != VLC_FOURCC( 'a', 'v', 'c', '1') ||
p_dec->fmt_in.i_extra < 7 ) )
{
return VLC_EGENERIC;
}
......@@ -144,6 +154,10 @@ static int Open( vlc_object_t *p_this )
p_sys->i_flags = 0;
p_sys->b_sps = VLC_FALSE;
p_sys->i_nal_type = -1;
p_sys->i_idr_pic_id = -1;
p_sys->i_frame_num = -1;
/* Setup properties */
es_format_Copy( &p_dec->fmt_out, &p_dec->fmt_in );
p_dec->fmt_out.i_codec = VLC_FOURCC( 'h', '2', '6', '4' );
......@@ -311,6 +325,7 @@ static block_t *PacketizeAVC1( decoder_t *p_dec, block_t **pp_block )
p_part->i_dts = p_block->i_dts;
p_part->i_pts = p_block->i_pts;
/* Parse the NAL */
if( ( p_pic = ParseNALBlock( p_dec, p_part ) ) )
{
......@@ -334,13 +349,15 @@ static block_t *nal_get_annexeb( decoder_t *p_dec, uint8_t *p, int i_size )
p_nal->p_buffer[1] = 0x00;
p_nal->p_buffer[2] = 0x00;
p_nal->p_buffer[3] = 0x01;
/* Copy nalu */
memcpy( &p_nal->p_buffer[4], p, i_size );
return p_nal;
}
static void nal_get_decoded( uint8_t **pp_ret, int *pi_ret, uint8_t *src, int i_src )
static void nal_get_decoded( uint8_t **pp_ret, int *pi_ret,
uint8_t *src, int i_src )
{
uint8_t *end = &src[i_src];
uint8_t *dst = malloc( i_src );
......@@ -349,7 +366,8 @@ static void nal_get_decoded( uint8_t **pp_ret, int *pi_ret, uint8_t *src, int i_
while( src < end )
{
if( src < end - 3 && src[0] == 0x00 && src[1] == 0x00 && src[2] == 0x03 )
if( src < end - 3 && src[0] == 0x00 && src[1] == 0x00 &&
src[2] == 0x03 )
{
*dst++ = 0x00;
*dst++ = 0x00;
......@@ -373,6 +391,7 @@ static inline int bs_read_ue( bs_t *s )
}
return( ( 1 << i) - 1 + bs_read( s, i ) );
}
static inline int bs_read_se( bs_t *s )
{
int val = bs_read_ue( s );
......@@ -387,68 +406,108 @@ static block_t *ParseNALBlock( decoder_t *p_dec, block_t *p_frag )
block_t *p_pic = NULL;
const int i_ref_idc = (p_frag->p_buffer[4] >> 5)&0x03;
const int i_nal_type= p_frag->p_buffer[4]&0x1f;
const int i_nal_type = p_frag->p_buffer[4]&0x1f;
if( p_sys->b_slice &&
( i_nal_type == NAL_SLICE || i_nal_type == NAL_SLICE_IDR ||
i_nal_type == NAL_SLICE_DPC || i_nal_type == NAL_SPS || i_nal_type == NAL_PPS ) )
{
if( p_sys->b_sps )
{
p_pic = block_ChainGather( p_sys->p_frame );
p_pic->i_dts = p_sys->i_dts;
p_pic->i_pts = p_sys->i_pts;
p_pic->i_length = 0; /* FIXME */
p_pic->i_flags = p_sys->i_flags;
}
else
if( p_sys->b_slice && !p_sys->b_sps )
{
block_ChainRelease( p_sys->p_frame );
msg_Warn( p_dec, "waiting SPS" );
}
msg_Warn( p_dec, "waiting for SPS" );
/* reset context */
/* Reset context */
p_sys->p_frame = NULL;
p_sys->b_slice = VLC_FALSE;
//p_sys->i_dts += 40000;
}
if( i_nal_type >= NAL_SLICE && i_nal_type <= NAL_SLICE_IDR )
if( !p_sys->b_sps &&
i_nal_type >= NAL_SLICE && i_nal_type <= NAL_SLICE_IDR )
{
p_sys->b_slice = VLC_TRUE;
/* Fragment will be discarded later on */
}
else if( i_nal_type >= NAL_SLICE && i_nal_type <= NAL_SLICE_IDR )
{
uint8_t *dec;
int i_dec;
int i_dec, i_first_mb, i_slice_type, i_frame_num, i_pic_flags = 0;
vlc_bool_t b_pic = VLC_FALSE;
bs_t s;
p_sys->b_slice = VLC_TRUE;
p_sys->i_dts = p_frag->i_dts;
p_sys->i_pts = p_frag->i_pts;
/* do not convert the whole frame */
nal_get_decoded( &dec, &i_dec, &p_frag->p_buffer[5], __MIN( p_frag->i_buffer - 5, 60 ) );
nal_get_decoded( &dec, &i_dec, &p_frag->p_buffer[5],
__MIN( p_frag->i_buffer - 5, 60 ) );
bs_init( &s, dec, i_dec );
/* i_first_mb */
bs_read_ue( &s );
/* picture type */
switch( bs_read_ue( &s ) )
/* first_mb_in_slice */
i_first_mb = bs_read_ue( &s );
/* slice_type */
switch( (i_slice_type = bs_read_ue( &s )) )
{
case 0: case 5:
p_sys->i_flags = BLOCK_FLAG_TYPE_P;
i_pic_flags = BLOCK_FLAG_TYPE_P;
break;
case 1: case 6:
p_sys->i_flags =BLOCK_FLAG_TYPE_B;
i_pic_flags = BLOCK_FLAG_TYPE_B;
break;
case 2: case 7:
p_sys->i_flags = BLOCK_FLAG_TYPE_I;
i_pic_flags = BLOCK_FLAG_TYPE_I;
break;
case 3: case 8: /* SP */
p_sys->i_flags = BLOCK_FLAG_TYPE_P;
i_pic_flags = BLOCK_FLAG_TYPE_P;
break;
case 4: case 9:
p_sys->i_flags = BLOCK_FLAG_TYPE_I;
i_pic_flags = BLOCK_FLAG_TYPE_I;
break;
}
/* pic_parameter_set_id */
bs_read_ue( &s );
/* frame_num */
i_frame_num = bs_read( &s, p_sys->i_log2_max_frame_num + 4 );
if( i_nal_type != NAL_SLICE_IDR && i_frame_num != p_sys->i_frame_num )
{
b_pic = VLC_TRUE;
}
p_sys->i_frame_num = i_frame_num;
if( !p_sys->b_frame_mbs_only )
{
/* field_pic_flag */
if( bs_read( &s, 1 ) )
{
/* bottom_field_flag */
bs_read( &s, 1 );
}
}
if( i_nal_type == NAL_SLICE_IDR )
{
/* id_pic_id */
int i_idr_pic_id = bs_read_ue( &s );
if( p_sys->i_nal_type != i_nal_type ) b_pic = VLC_TRUE;
if( p_sys->i_idr_pic_id != i_idr_pic_id ) b_pic = VLC_TRUE;
p_sys->i_idr_pic_id = i_idr_pic_id;
}
p_sys->i_nal_type = i_nal_type;
if( b_pic && p_sys->b_slice )
{
p_pic = block_ChainGather( p_sys->p_frame );
p_pic->i_dts = p_sys->i_dts;
p_pic->i_pts = p_sys->i_pts;
p_pic->i_length = 0; /* FIXME */
p_pic->i_flags = p_sys->i_flags;
/* Reset context */
p_sys->p_frame = NULL;
p_sys->b_slice = VLC_FALSE;
}
p_sys->b_slice = VLC_TRUE;
p_sys->i_flags = i_pic_flags;
p_sys->i_dts = p_frag->i_dts;
p_sys->i_pts = p_frag->i_pts;
free( dec );
}
else if( i_nal_type == NAL_SPS )
......@@ -458,9 +517,12 @@ static block_t *ParseNALBlock( decoder_t *p_dec, block_t *p_frag )
bs_t s;
int i_tmp;
msg_Dbg( p_dec, "found NAL_SPS" );
p_sys->b_sps = VLC_TRUE;
nal_get_decoded( &dec, &i_dec, &p_frag->p_buffer[5], p_frag->i_buffer - 5 );
nal_get_decoded( &dec, &i_dec, &p_frag->p_buffer[5],
p_frag->i_buffer - 5 );
bs_init( &s, dec, i_dec );
/* Skip profile(8), constraint_set012, reserver(5), level(8) */
......@@ -468,7 +530,7 @@ static block_t *ParseNALBlock( decoder_t *p_dec, block_t *p_frag )
/* sps id */
bs_read_ue( &s );
/* Skip i_log2_max_frame_num */
bs_read_ue( &s );
p_sys->i_log2_max_frame_num = bs_read_ue( &s );
/* Read poc_type */
i_tmp = bs_read_ue( &s );
if( i_tmp == 0 )
......@@ -504,8 +566,8 @@ static block_t *ParseNALBlock( decoder_t *p_dec, block_t *p_frag )
p_dec->fmt_out.video.i_height = 16 * ( bs_read_ue( &s ) + 1 );
/* b_frame_mbs_only */
i_tmp = bs_read( &s, 1 );
if( i_tmp == 0 )
p_sys->b_frame_mbs_only = bs_read( &s, 1 );
if( p_sys->b_frame_mbs_only == 0 )
{
bs_skip( &s, 1 );
}
......@@ -555,9 +617,8 @@ static block_t *ParseNALBlock( decoder_t *p_dec, block_t *p_frag )
h = bs_read( &s, 16 );
}
p_dec->fmt_out.video.i_aspect =
VOUT_ASPECT_FACTOR *
w / h *
p_dec->fmt_out.video.i_width / p_dec->fmt_out.video.i_height;
VOUT_ASPECT_FACTOR * w / h * p_dec->fmt_out.video.i_width /
p_dec->fmt_out.video.i_height;
}
}
......@@ -569,12 +630,11 @@ static block_t *ParseNALBlock( decoder_t *p_dec, block_t *p_frag )
bs_init( &s, &p_frag->p_buffer[5], p_frag->i_buffer - 5 );
/* TODO */
msg_Dbg( p_dec, "found NAL_PPS" );
}
/* Append the block */
block_ChainAppend( &p_sys->p_frame, p_frag );
return p_pic;
}
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