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libdvbpsi
Commit d1f318a2 authored by Jean-Paul Saman's avatar Jean-Paul Saman
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BAT: refactor dvbpsi_GatherBATSections

parent 546c4c45
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Showing with 124 additions and 86 deletions
src/tables/bat.c
View file @ d1f318a2
......@@ -294,6 +294,114 @@ dvbpsi_descriptor_t *dvbpsi_BATTSAddDescriptor(
return p_descriptor;
}
/* */
static void dvbpsi_ReInitBAT(dvbpsi_bat_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_bat)
dvbpsi_DeleteBAT(p_decoder->p_building_bat);
}
p_decoder->p_building_bat = 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_CheckBAT(dvbpsi_t *p_dvbpsi, dvbpsi_bat_decoder_t *p_bat_decoder,
dvbpsi_psi_section_t *p_section)
{
bool b_reinit = false;
assert(p_dvbpsi);
assert(p_bat_decoder);
if (p_bat_decoder->p_building_bat->i_bouquet_id != p_section->i_extension)
{
/* bouquet_id */
dvbpsi_error(p_dvbpsi, "BAT decoder", "'bouquet_id' differs"
" whereas no TS discontinuity has occured");
b_reinit = true;
}
else if (p_bat_decoder->p_building_bat->i_version
!= p_section->i_version)
{
/* version_number */
dvbpsi_error(p_dvbpsi, "BAT decoder", "'version_number' differs"
" whereas no discontinuity has occured");
b_reinit = true;
}
else if (p_bat_decoder->i_last_section_number !=
p_section->i_last_number)
{
/* last_section_number */
dvbpsi_error(p_dvbpsi, "BAT decoder", "'last_section_number' differs"
" whereas no discontinuity has occured");
b_reinit = true;
}
return b_reinit;
}
static bool dvbpsi_IsCompleteBAT(dvbpsi_bat_decoder_t* p_bat_decoder)
{
assert(p_bat_decoder);
bool b_complete = false;
for (unsigned int i = 0; i <= p_bat_decoder->i_last_section_number; i++)
{
if (!p_bat_decoder->ap_sections[i])
break;
if (i == p_bat_decoder->i_last_section_number)
b_complete = true;
}
return b_complete;
}
static bool dvbpsi_AddSectionBAT(dvbpsi_t *p_dvbpsi, dvbpsi_bat_decoder_t *p_bat_decoder,
dvbpsi_psi_section_t* p_section)
{
assert(p_dvbpsi);
assert(p_bat_decoder);
assert(p_section);
/* Initialize the structures if it's the first section received */
if (!p_bat_decoder->p_building_bat)
{
p_bat_decoder->p_building_bat = dvbpsi_NewBAT(p_section->i_extension,
p_section->i_version, p_section->b_current_next);
if (p_bat_decoder->p_building_bat)
return false;
p_bat_decoder->i_last_section_number = p_section->i_last_number;
}
/* Fill the section array */
if (p_bat_decoder->ap_sections[p_section->i_number] != NULL)
{
dvbpsi_debug(p_dvbpsi, "BAT decoder", "overwrite section number %d",
p_section->i_number);
dvbpsi_DeletePSISections(p_bat_decoder->ap_sections[p_section->i_number]);
}
p_bat_decoder->ap_sections[p_section->i_number] = p_section;
return true;
}
/*****************************************************************************
* dvbpsi_GatherBATSections
*****************************************************************************
......@@ -315,14 +423,11 @@ void dvbpsi_GatherBATSections(dvbpsi_t *p_dvbpsi,
return;
}
/* */
bool b_reinit = false;
/* We have a valid BAT section */
/* TS discontinuity check */
if (p_demux->b_discontinuity)
{
b_reinit = true;
dvbpsi_ReInitBAT(p_bat_decoder, true);
p_bat_decoder->b_discontinuity = false;
p_demux->b_discontinuity = false;
}
else
......@@ -330,29 +435,8 @@ void dvbpsi_GatherBATSections(dvbpsi_t *p_dvbpsi,
/* Perform a few sanity checks */
if (p_bat_decoder->p_building_bat)
{
if (p_bat_decoder->p_building_bat->i_bouquet_id != p_section->i_extension)
{
/* bouquet_id */
dvbpsi_error(p_dvbpsi, "BAT decoder", "'bouquet_id' differs"
" whereas no TS discontinuity has occured");
b_reinit = true;
}
else if (p_bat_decoder->p_building_bat->i_version
!= p_section->i_version)
{
/* version_number */
dvbpsi_error(p_dvbpsi, "BAT decoder", "'version_number' differs"
" whereas no discontinuity has occured");
b_reinit = true;
}
else if (p_bat_decoder->i_last_section_number !=
p_section->i_last_number)
{
/* last_section_number */
dvbpsi_error(p_dvbpsi, "BAT decoder", "'last_section_number' differs"
" whereas no discontinuity has occured");
b_reinit = true;
}
if (dvbpsi_CheckBAT(p_dvbpsi, p_bat_decoder, p_section))
dvbpsi_ReInitBAT(p_bat_decoder, true);
}
else
{
......@@ -365,7 +449,10 @@ void dvbpsi_GatherBATSections(dvbpsi_t *p_dvbpsi,
dvbpsi_debug(p_dvbpsi, "BAT decoder",
"ignoring already decoded section %d",
p_section->i_number);
dvbpsi_DeletePSISections(p_section);
return;
}
#if 0 /* FIXME: Is this really needed ? */
else if ( (!p_bat_decoder->current_bat.b_current_next)
&& (p_section->b_current_next))
{
......@@ -382,75 +469,28 @@ void dvbpsi_GatherBATSections(dvbpsi_t *p_dvbpsi,
}
dvbpsi_DeletePSISections(p_section);
return;
#endif
}
}
/* Reinit the decoder if wanted */
if (b_reinit)
{
/* Force redecoding */
p_bat_decoder->b_current_valid = false;
/* Free structures */
if (p_bat_decoder->p_building_bat)
{
dvbpsi_DeleteBAT(p_bat_decoder->p_building_bat);
p_bat_decoder->p_building_bat = NULL;
}
/* Clear the section array */
for (unsigned int i = 0; i < 256; i++)
{
if (p_bat_decoder->ap_sections[i] != NULL)
{
dvbpsi_DeletePSISections(p_bat_decoder->ap_sections[i]);
p_bat_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_bat_decoder->p_building_bat)
{
p_bat_decoder->p_building_bat =
(dvbpsi_bat_t*)malloc(sizeof(dvbpsi_bat_t));
if (p_bat_decoder->p_building_bat)
dvbpsi_InitBAT(p_bat_decoder->p_building_bat,
p_section->i_extension,
p_section->i_version,
p_section->b_current_next);
else
dvbpsi_error(p_dvbpsi, "BAT decoder", "failed decoding BAT section");
p_bat_decoder->i_last_section_number = p_section->i_last_number;
}
/* Fill the section array */
if (p_bat_decoder->ap_sections[p_section->i_number] != NULL)
/* Add section to BAT */
if (!dvbpsi_AddSectionBAT(p_dvbpsi, p_bat_decoder, p_section))
{
dvbpsi_debug(p_dvbpsi, "BAT decoder", "overwrite section number %d",
dvbpsi_error(p_dvbpsi, "BAT decoder", "failed decoding section %d",
p_section->i_number);
dvbpsi_DeletePSISections(p_bat_decoder->ap_sections[p_section->i_number]);
dvbpsi_DeletePSISections(p_section);
return;
}
p_bat_decoder->ap_sections[p_section->i_number] = p_section;
/* Check if we have all the sections */
for (unsigned int i = 0; i <= p_bat_decoder->i_last_section_number; i++)
if (dvbpsi_IsCompleteBAT(p_bat_decoder))
{
if (!p_bat_decoder->ap_sections[i])
break;
if (i == p_bat_decoder->i_last_section_number)
b_complete = true;
}
assert(p_bat_decoder->pf_bat_callback);
if (b_complete)
{
/* Save the current information */
p_bat_decoder->current_bat = *p_bat_decoder->p_building_bat;
p_bat_decoder->b_current_valid = true;
/* Chain the sections */
assert(p_bat_decoder->i_last_section_number > 256);
if (p_bat_decoder->i_last_section_number)
{
for (uint8_t j = 0; j <= p_bat_decoder->i_last_section_number - 1; j++)
......@@ -466,9 +506,7 @@ void dvbpsi_GatherBATSections(dvbpsi_t *p_dvbpsi,
p_bat_decoder->pf_bat_callback(p_bat_decoder->p_cb_data,
p_bat_decoder->p_building_bat);
/* Reinitialize the structures */
p_bat_decoder->p_building_bat = NULL;
for (unsigned int i = 0; i <= p_bat_decoder->i_last_section_number; i++)
p_bat_decoder->ap_sections[i] = NULL;
dvbpsi_ReInitBAT(p_bat_decoder, false);
}
}
......
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