VLC 追蹤之三 packetizer

設定 p_es_out_display->pf_control = EsOutControl
../src/input/input.c -> Create -> input_EsOutNew

    p_input->p->p_es_out_display = input_EsOutNew( p_input, p_input->p->i_rate );

../src/input/es_out.c

es_out_t *input_EsOutNew( input_thread_t *p_input, int i_rate )

    out->pf_control = EsOutControl;

設定 

    p_es_out->pf_control = Control

    p_es_out->p_out = p_es_out_display

../src/input/input.c -> Init

    p_input->p->p_es_out = input_EsOutTimeshiftNew( p_input, p_input->p->p_es_out_display, p_input->p->i_rate );

../src/input/es_out_timeshift.c

es_out_t *input_EsOutTimeshiftNew( input_thread_t *p_input, es_out_t *p_next_out, int i_rate )

    p_out->pf_control = Control;

    p_out->p_sys      = p_sys;

    p_sys->p_out = p_next_out;

觸發 pf_control, 此時是 es_out_timeshift.c 內的 Control

../src/input/input.c

Init -> InitPrograms -> es_out_SetMode

    es_out_SetMode( p_input->p->p_es_out, i_es_out_mode );

../src/input/es_out.h

static inline void es_out_SetMode( es_out_t *p_out, int i_mode )

{

    int i_ret = es_out_Control( p_out, ES_OUT_SET_MODE, i_mode );

    assert( !i_ret );

}

../include/vlc_es_out.h

es_out_Control -> es_out_vaControl( out, i_query, args );

static inline int es_out_vaControl( es_out_t *out, int i_query, va_list args )

{

    return out->pf_control( out, i_query, args );

}

一樣透過 es_out_Control 觸發 pf_control, 此時是 es_out.c 內的 EsOutControl

../src/input/es_out_timeshift.c

static int Control( es_out_t *p_out, int i_query, va_list args )

    i_ret = ControlLocked( p_out, i_query, args );

static int ControlLocked( es_out_t *p_out, int i_query, va_list args )

    es_out_sys_t *p_sys = p_out->p_sys;

    int rt =  CmdExecuteControl( p_sys->p_out, &cmd );

static int CmdExecuteControl( es_out_t *p_out, ts_cmd_t *p_cmd )

    int rt = es_out_Control( p_out, i_query, p_cmd->u.control.u.i_int );

../src/input/es_out.c

EsOutControl -> EsOutControlLocked -> EsSelect -> EsCreateDecoder -> input_DecoderNew

../src/input/decoder.c

input_DecoderNew -> decoder_New -> CreateDecoder -> LoadDecoder

    p_dec->p_module = module_need( p_dec, "packetizer", "$packetizer", false );

最後帶入 packetizer