/**
* @brief Destroy the ts_sc_comp object
*
* @param ts_sc The ts_sc_comp object to destroy
*/
void c_destroy_sc(struct ts_sc_comp *const ts_sc)
{
assert(ts_sc != NULL);
assert(ts_sc->ts_unscaled_wlsb != NULL);
assert(ts_sc->ts_scaled_wlsb != NULL);
c_destroy_wlsb(ts_sc->ts_unscaled_wlsb);
c_destroy_wlsb(ts_sc->ts_scaled_wlsb);
}
//----------------------------------------------------------------------------------------------------------------------------------
// Free a context and the profile specific data within
// Param context: context to free
//----------------------------------------------------------------------------------------------------------------------------------
void context_free(struct sd_context * context)
{
if(!context)
return;
context->profile->free_decode_data(context->data);
c_destroy_wlsb(context->total_16_uncompressed);
c_destroy_wlsb(context->total_16_compressed);
c_destroy_wlsb(context->header_16_uncompressed);
c_destroy_wlsb(context->header_16_compressed);
kfree(context);
}
/**
* @brief Create the ts_sc_comp object
*
* @param ts_sc The ts_sc_comp object to create
* @param wlsb_window_width The width of the W-LSB sliding window to use
* for TS_STRIDE (must be > 0)
* @param trace_cb The trace callback
* @param trace_cb_priv An optional private context for the trace
* callback, may be NULL
* @return true if creation is successful, false otherwise
*/
bool c_create_sc(struct ts_sc_comp *const ts_sc,
const size_t wlsb_window_width,
rohc_trace_callback2_t trace_cb,
void *const trace_cb_priv)
{
assert(ts_sc != NULL);
assert(wlsb_window_width > 0);
ts_sc->ts_stride = 0;
ts_sc->ts_scaled = 0;
ts_sc->ts_offset = 0;
ts_sc->old_ts = 0;
ts_sc->ts = 0;
ts_sc->ts_delta = 0;
ts_sc->old_sn = 0;
ts_sc->sn = 0;
ts_sc->is_deducible = false;
ts_sc->state = INIT_TS;
ts_sc->are_old_val_init = false;
ts_sc->nr_init_stride_packets = 0;
ts_sc->trace_callback = trace_cb;
ts_sc->trace_callback_priv = trace_cb_priv;
/* W-LSB context for TS_SCALED */
ts_sc->ts_scaled_wlsb = c_create_wlsb(32, wlsb_window_width,
ROHC_LSB_SHIFT_RTP_TS);
if(ts_sc->ts_scaled_wlsb == NULL)
{
rohc_error(ts_sc, ROHC_TRACE_COMP, ROHC_PROFILE_GENERAL,
"cannot create a W-LSB window for TS_SCALED");
goto error;
}
/* W-LSB context for unscaled TS */
ts_sc->ts_unscaled_wlsb = c_create_wlsb(32, wlsb_window_width,
ROHC_LSB_SHIFT_RTP_TS);
if(ts_sc->ts_unscaled_wlsb == NULL)
{
rohc_error(ts_sc, ROHC_TRACE_COMP, ROHC_PROFILE_GENERAL,
"cannot create a W-LSB window for unscaled TS");
goto free_ts_scaled_wlsb;
}
return true;
free_ts_scaled_wlsb:
c_destroy_wlsb(ts_sc->ts_scaled_wlsb);
error:
return false;
}