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Commit c0cc2545 authored by Jean-Paul Saman's avatar Jean-Paul Saman
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ATSC MGT: refactor dvbpsi_atsc_GatherMGTSections.

parent 0f386934
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Showing with 144 additions and 94 deletions
src/tables/atsc_mgt.c
View file @ c0cc2545
......@@ -336,6 +336,120 @@ static dvbpsi_descriptor_t *dvbpsi_atsc_MGTTableAddDescriptor(
return p_descriptor;
}
/*****************************************************************************
* dvbpsi_ReInitMGT *
*****************************************************************************/
static void dvbpsi_ReInitMGT(dvbpsi_atsc_mgt_decoder_t *p_decoder, const bool b_force)
{
assert(p_decoder);
/* Force redecoding */
if (b_force)
{
p_decoder->b_current_valid = false;
/* Free structures */
if (p_decoder->p_building_mgt)
dvbpsi_atsc_DeleteMGT(p_decoder->p_building_mgt);
}
p_decoder->p_building_mgt = NULL;
/* Clear the section array */
for (unsigned int i = 0; i <= 255; i++)
{
if (p_decoder->ap_sections[i] != NULL)
{
dvbpsi_DeletePSISections(p_decoder->ap_sections[i]);
p_decoder->ap_sections[i] = NULL;
}
}
}
static bool dvbpsi_CheckMGT(dvbpsi_t *p_dvbpsi, dvbpsi_atsc_mgt_decoder_t *p_decoder,
dvbpsi_psi_section_t *p_section)
{
bool b_reinit = false;
assert(p_dvbpsi);
assert(p_decoder);
if (p_decoder->p_building_mgt->i_table_id_ext != p_section->i_extension)
{
/* transport_stream_id */
dvbpsi_error(p_dvbpsi, "ATSC MGT decoder",
"'transport_stream_id' differs"
" whereas no TS discontinuity has occured");
b_reinit = true;
}
else if (p_decoder->p_building_mgt->i_version != p_section->i_version)
{
/* version_number */
dvbpsi_error(p_dvbpsi, "ATSC MGT decoder",
"'version_number' differs"
" whereas no discontinuity has occured");
b_reinit = true;
}
else if (p_decoder->i_last_section_number != p_section->i_last_number)
{
/* last_section_number */
dvbpsi_error(p_dvbpsi, "ATSC MGT decoder",
"'last_section_number' differs"
" whereas no discontinuity has occured");
b_reinit = true;
}
return b_reinit;
}
static bool dvbpsi_AddSectionMGT(dvbpsi_t *p_dvbpsi, dvbpsi_atsc_mgt_decoder_t *p_decoder,
dvbpsi_psi_section_t* p_section)
{
assert(p_dvbpsi);
assert(p_decoder);
assert(p_section);
/* Initialize the structures if it's the first section received */
if (!p_decoder->p_building_mgt)
{
p_decoder->p_building_mgt = dvbpsi_atsc_NewMGT(p_section->i_version,
p_section->p_payload_start[0],
p_section->i_extension,
p_section->b_current_next);
if (p_decoder->p_building_mgt)
return false;
p_decoder->i_last_section_number = p_section->i_last_number;
}
/* Fill the section array */
if (p_decoder->ap_sections[p_section->i_number] != NULL)
{
dvbpsi_debug(p_dvbpsi, "ATSC MGT decoder", "overwrite section number %d",
p_section->i_number);
dvbpsi_DeletePSISections(p_decoder->ap_sections[p_section->i_number]);
}
p_decoder->ap_sections[p_section->i_number] = p_section;
return true;
}
static bool dvbpsi_IsCompleteMGT(dvbpsi_atsc_mgt_decoder_t *p_decoder)
{
assert(p_decoder);
bool b_complete = false;
for (unsigned int i = 0; i <= p_decoder->i_last_section_number; i++)
{
if (!p_decoder->ap_sections[i])
break;
if (i == p_decoder->i_last_section_number)
b_complete = true;
}
return b_complete;
}
/*****************************************************************************
* dvbpsi_atsc_GatherMGTSections
*****************************************************************************
......@@ -355,6 +469,7 @@ static void dvbpsi_atsc_GatherMGTSections(dvbpsi_t * p_dvbpsi,
}
/* We have a valid MGT section */
dvbpsi_demux_t *p_demux = (dvbpsi_demux_t *) p_dvbpsi->p_private;
dvbpsi_atsc_mgt_decoder_t * p_mgt_decoder = (dvbpsi_atsc_mgt_decoder_t*)p_decoder;
if (!p_mgt_decoder)
{
......@@ -363,49 +478,36 @@ static void dvbpsi_atsc_GatherMGTSections(dvbpsi_t * p_dvbpsi,
return;
}
bool b_reinit = false;
dvbpsi_demux_t *p_demux = (dvbpsi_demux_t *) p_dvbpsi->p_private;
/* TS discontinuity check */
if (p_demux->b_discontinuity)
{
b_reinit = true;
dvbpsi_ReInitMGT(p_mgt_decoder, true);
p_mgt_decoder->b_discontinuity = false;
p_demux->b_discontinuity = false;
}
else
{
/* Perform a few sanity checks */
if(p_mgt_decoder->p_building_mgt)
if (p_mgt_decoder->p_building_mgt)
{
if(p_mgt_decoder->p_building_mgt->i_table_id_ext != p_section->i_extension)
{
/* transport_stream_id */
dvbpsi_error(p_dvbpsi, "ATSC MGT decoder",
"'transport_stream_id' differs"
" whereas no TS discontinuity has occured");
b_reinit = true;
}
else if(p_mgt_decoder->p_building_mgt->i_version
!= p_section->i_version)
{
/* version_number */
dvbpsi_error(p_dvbpsi, "ATSC MGT decoder",
"'version_number' differs"
" whereas no discontinuity has occured");
b_reinit = true;
}
else if(p_mgt_decoder->i_last_section_number !=
p_section->i_last_number)
{
/* last_section_number */
dvbpsi_error(p_dvbpsi, "ATSC MGT decoder",
"'last_section_number' differs"
" whereas no discontinuity has occured");
b_reinit = true;
}
if (dvbpsi_CheckMGT(p_dvbpsi, p_mgt_decoder, p_section))
dvbpsi_ReInitMGT(p_mgt_decoder, true);
}
else
{
if ( (p_mgt_decoder->b_current_valid)
&& (p_mgt_decoder->current_mgt.i_version == p_section->i_version)
&& (p_mgt_decoder->current_mgt.b_current_next ==
p_section->b_current_next))
{
/* Don't decode since this version is already decoded */
dvbpsi_debug(p_dvbpsi, "ATSC MGT decoder",
"ignoring already decoded section %d",
p_section->i_number);
dvbpsi_DeletePSISections(p_section);
return;
}
#if 0 /* Do we need to signal b_current_next here? or later */
if ((p_mgt_decoder->b_current_valid) &&
(p_mgt_decoder->current_mgt.i_version == p_section->i_version))
{
......@@ -426,79 +528,29 @@ static void dvbpsi_atsc_GatherMGTSections(dvbpsi_t * p_dvbpsi,
}
dvbpsi_DeletePSISections(p_section);
return;
#endif
}
}
/* Reinit the decoder if wanted */
if (b_reinit)
{
/* Force redecoding */
p_mgt_decoder->b_current_valid = false;
/* Free structures */
if(p_mgt_decoder->p_building_mgt)
{
dvbpsi_atsc_DeleteMGT(p_mgt_decoder->p_building_mgt);
p_mgt_decoder->p_building_mgt = NULL;
}
/* Clear the section array */
for (unsigned int i = 0; i < 256; i++)
{
if(p_mgt_decoder->ap_sections[i] != NULL)
{
dvbpsi_DeletePSISections(p_mgt_decoder->ap_sections[i]);
p_mgt_decoder->ap_sections[i] = NULL;
}
}
}
/* Append the section to the list if wanted */
bool b_complete = false;
/* Initialize the structures if it's the first section received */
if(!p_mgt_decoder->p_building_mgt)
{
p_mgt_decoder->p_building_mgt =
(dvbpsi_atsc_mgt_t*)malloc(sizeof(dvbpsi_atsc_mgt_t));
if (p_mgt_decoder)
{
dvbpsi_atsc_InitMGT(p_mgt_decoder->p_building_mgt,
p_section->i_version,
p_section->p_payload_start[0],
p_section->i_extension,
p_section->b_current_next);
p_mgt_decoder->i_last_section_number = p_section->i_last_number;
}
else
dvbpsi_error(p_dvbpsi, "ATSC MGT decoder", "failed decoding ATSC MGT section");
}
/* Fill the section array */
if(p_mgt_decoder->ap_sections[p_section->i_number] != NULL)
/* Add section to MGT */
if (!dvbpsi_AddSectionMGT(p_dvbpsi, p_mgt_decoder, p_section))
{
dvbpsi_error(p_dvbpsi, "ATSC MGT decoder", "overwrite section number %d",
p_section->i_number);
dvbpsi_DeletePSISections(p_mgt_decoder->ap_sections[p_section->i_number]);
dvbpsi_error(p_dvbpsi, "ATSC MGT decoder", "failed decoding section %d",
p_section->i_number);
dvbpsi_DeletePSISections(p_section);
return;
}
p_mgt_decoder->ap_sections[p_section->i_number] = p_section;
/* Check if we have all the sections */
b_complete = false;
for (uint8_t i = 0; i <= p_mgt_decoder->i_last_section_number; i++)
if (dvbpsi_IsCompleteMGT(p_mgt_decoder))
{
if (!p_mgt_decoder->ap_sections[i])
break;
if (i == p_mgt_decoder->i_last_section_number)
b_complete = true;
}
assert(p_mgt_decoder->pf_mgt_callback);
if (b_complete)
{
/* Save the current information */
p_mgt_decoder->current_mgt = *p_mgt_decoder->p_building_mgt;
p_mgt_decoder->b_current_valid = true;
/* Chain the sections */
if(p_mgt_decoder->i_last_section_number)
if (p_mgt_decoder->i_last_section_number)
{
for (uint8_t i = 0; i <= p_mgt_decoder->i_last_section_number - 1; i++)
p_mgt_decoder->ap_sections[i]->p_next =
......@@ -513,9 +565,7 @@ static void dvbpsi_atsc_GatherMGTSections(dvbpsi_t * p_dvbpsi,
p_mgt_decoder->pf_mgt_callback(p_mgt_decoder->p_cb_data,
p_mgt_decoder->p_building_mgt);
/* Reinitialize the structures */
p_mgt_decoder->p_building_mgt = NULL;
for (uint8_t i = 0; i <= p_mgt_decoder->i_last_section_number; i++)
p_mgt_decoder->ap_sections[i] = NULL;
dvbpsi_ReInitMGT(p_mgt_decoder, false);
}
dvbpsi_DeletePSISections(p_section);
}
......
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