#include "vlc_bits.h"
#include "vlc_block_helper.h"
+#include "packetizer_helper.h"
/*****************************************************************************
* Module descriptor
/*
* Input properties
*/
- block_bytestream_t bytestream;
- int i_state;
- size_t i_offset;
- uint8_t p_startcode[3];
+ packetizer_t packetizer;
/* Current sequence header */
bool b_sequence_header;
mtime_t i_interpolated_dts;
};
-enum
-{
- STATE_NOSYNC,
- STATE_NEXT_SYNC
-};
-
typedef enum
{
IDU_TYPE_SEQUENCE_HEADER = 0x0f,
static block_t *Packetize( decoder_t *p_dec, block_t **pp_block );
+static void PacketizeReset( void *p_private, bool b_broken );
+static block_t *PacketizeParse( void *p_private, bool *pb_ts_used, block_t * );
+static int PacketizeValidate( void *p_private, block_t * );
+
+static block_t *ParseIDU( decoder_t *p_dec, bool *pb_used_ts, block_t *p_frag );
+
+static const uint8_t p_vc1_startcode[3] = { 0x00, 0x00, 0x01 };
/*****************************************************************************
* Open: probe the packetizer and return score
*****************************************************************************
es_format_Copy( &p_dec->fmt_out, &p_dec->fmt_in );
p_dec->p_sys = p_sys = malloc( sizeof( decoder_sys_t ) );
- p_sys->i_state = STATE_NOSYNC;
- p_sys->bytestream = block_BytestreamInit();
- p_sys->p_startcode[0] = 0x00;
- p_sys->p_startcode[1] = 0x00;
- p_sys->p_startcode[2] = 0x01;
- p_sys->i_offset = 0;
+ packetizer_Init( &p_sys->packetizer,
+ p_vc1_startcode, sizeof(p_vc1_startcode),
+ NULL, 0,
+ PacketizeReset, PacketizeParse, PacketizeValidate, p_dec );
p_sys->b_sequence_header = false;
p_sys->sh.p_sh = NULL;
p_sys->i_interpolated_dts = -1;
- /* */
if( p_dec->fmt_out.i_extra > 0 )
{
uint8_t *p_extra = p_dec->fmt_out.p_extra;
decoder_t *p_dec = (decoder_t*)p_this;
decoder_sys_t *p_sys = p_dec->p_sys;
- block_BytestreamRelease( &p_sys->bytestream );
+ packetizer_Clean( &p_sys->packetizer );
if( p_sys->p_frame )
block_Release( p_sys->p_frame );
free( p_sys );
/*****************************************************************************
* Packetize: packetize an access unit
*****************************************************************************/
-static block_t *ParseIDU( decoder_t *p_dec, bool *pb_used_ts, block_t *p_frag );
-
static block_t *Packetize( decoder_t *p_dec, block_t **pp_block )
{
decoder_sys_t *p_sys = p_dec->p_sys;
- block_t *p_pic;
-
- if( pp_block == NULL || *pp_block == NULL )
- return NULL;
- if( (*pp_block)->i_flags&(BLOCK_FLAG_DISCONTINUITY|BLOCK_FLAG_CORRUPTED) )
- {
- if( (*pp_block)->i_flags&BLOCK_FLAG_CORRUPTED )
- {
- p_sys->i_state = STATE_NOSYNC;
- block_BytestreamEmpty( &p_sys->bytestream );
-
- if( p_sys->p_frame )
- block_ChainRelease( p_sys->p_frame );
- p_sys->p_frame = NULL;
- p_sys->pp_last = &p_sys->p_frame;
- p_sys->b_frame = false;
- }
- p_sys->i_interpolated_dts = 0;
- block_Release( *pp_block );
- return NULL;
- }
+ return packetizer_Packetize( &p_sys->packetizer, pp_block );
+}
- block_BytestreamPush( &p_sys->bytestream, *pp_block );
+static void PacketizeReset( void *p_private, bool b_broken )
+{
+ decoder_t *p_dec = p_private;
+ decoder_sys_t *p_sys = p_dec->p_sys;
- for( ;; )
+ if( b_broken )
{
- bool b_used_ts;
-
- switch( p_sys->i_state )
- {
-
- case STATE_NOSYNC:
- if( block_FindStartcodeFromOffset( &p_sys->bytestream, &p_sys->i_offset, p_sys->p_startcode, 3 ) == VLC_SUCCESS )
- p_sys->i_state = STATE_NEXT_SYNC;
-
- if( p_sys->i_offset )
- {
- block_SkipBytes( &p_sys->bytestream, p_sys->i_offset );
- p_sys->i_offset = 0;
- block_BytestreamFlush( &p_sys->bytestream );
- }
-
- if( p_sys->i_state != STATE_NEXT_SYNC )
- return NULL; /* Need more data */
-
- p_sys->i_offset = 4; /* To find next startcode */
-
- case STATE_NEXT_SYNC:
- /* TODO: If p_block == NULL, flush the buffer without checking the
- * next sync word */
-
- /* Find the next startcode */
- if( block_FindStartcodeFromOffset( &p_sys->bytestream, &p_sys->i_offset, p_sys->p_startcode, 3 ) != VLC_SUCCESS )
- return NULL; /* Need more data */
-
- /* Get the new fragment and set the pts/dts */
- p_pic = block_New( p_dec, p_sys->i_offset );
- block_BytestreamFlush( &p_sys->bytestream );
- p_pic->i_pts = p_sys->bytestream.p_block->i_pts;
- p_pic->i_dts = p_sys->bytestream.p_block->i_dts;
-
- block_GetBytes( &p_sys->bytestream, p_pic->p_buffer, p_pic->i_buffer );
-
- p_sys->i_offset = 0;
-
- /* Parse and return complete frame */
- p_pic = ParseIDU( p_dec, &b_used_ts, p_pic );
-
- /* Don't reuse the same timestamps several times */
- if( b_used_ts )
- {
- p_sys->bytestream.p_block->i_pts = -1;
- p_sys->bytestream.p_block->i_dts = -1;
- }
-
- /* */
- if( !p_pic )
- {
- p_sys->i_state = STATE_NOSYNC;
- break;
- }
- /* */
- if( p_sys->i_interpolated_dts < 0 )
- {
- msg_Dbg( p_dec, "need a starting pts/dts" );
- p_sys->i_state = STATE_NOSYNC;
- block_Release( p_pic );
- break;
- }
+ if( p_sys->p_frame )
+ block_ChainRelease( p_sys->p_frame );
+ p_sys->p_frame = NULL;
+ p_sys->pp_last = &p_sys->p_frame;
+ p_sys->b_frame = false;
+ }
+ p_sys->i_interpolated_dts = 0;
+}
+static block_t *PacketizeParse( void *p_private, bool *pb_ts_used, block_t *p_block )
+{
+ decoder_t *p_dec = p_private;
- /* So p_block doesn't get re-added several times */
- *pp_block = block_BytestreamPop( &p_sys->bytestream );
+ return ParseIDU( p_dec, pb_ts_used, p_block );
+}
- p_sys->i_state = STATE_NOSYNC;
+static int PacketizeValidate( void *p_private, block_t *p_au )
+{
+ decoder_t *p_dec = p_private;
+ decoder_sys_t *p_sys = p_dec->p_sys;
- return p_pic;
- }
+ if( p_sys->i_interpolated_dts < 0 )
+ {
+ msg_Dbg( p_dec, "need a starting pts/dts" );
+ return VLC_EGENERIC;
}
+ VLC_UNUSED(p_au);
+ return VLC_SUCCESS;
}
+
/* DecodeRIDU: decode the startcode emulation prevention (same than h264) */
static void DecodeRIDU( uint8_t *p_ret, int *pi_ret, uint8_t *src, int i_src )
{
projects / vlc / blobdiff