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libdvbpsi
Commit fa575f15 authored by Jean-Paul Saman's avatar Jean-Paul Saman
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PMT: rework dvbpsi_GatherPMTSections

parent 85be9dd9
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Showing with 116 additions and 86 deletions
src/tables/pmt.c
View file @ fa575f15
......@@ -253,6 +253,109 @@ dvbpsi_descriptor_t* dvbpsi_PMTESAddDescriptor(dvbpsi_pmt_es_t* p_es,
return p_descriptor;
}
/* */
static void dvbpsi_ReInitPMT(dvbpsi_pmt_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_pmt)
free(p_decoder->p_building_pmt);
}
p_decoder->p_building_pmt = 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_CheckPMT(dvbpsi_t *p_dvbpsi, dvbpsi_psi_section_t *p_section)
{
bool b_reinit = false;
assert(p_dvbpsi->p_private);
dvbpsi_pmt_decoder_t* p_pmt_decoder;
p_pmt_decoder = (dvbpsi_pmt_decoder_t *)p_dvbpsi->p_private;
if (p_pmt_decoder->p_building_pmt->i_version != p_section->i_version)
{
/* version_number */
dvbpsi_error(p_dvbpsi, "PMT decoder",
"'version_number' differs"
" whereas no discontinuity has occured");
b_reinit = true;
}
else if (p_pmt_decoder->i_last_section_number != p_section->i_last_number)
{
/* last_section_number */
dvbpsi_error(p_dvbpsi, "PMT decoder",
"'last_section_number' differs"
" whereas no discontinuity has occured");
b_reinit = true;
}
return b_reinit;
}
static bool dvbpsi_IsCompletePMT(dvbpsi_pmt_decoder_t* p_pmt_decoder)
{
assert(p_pmt_decoder);
bool b_complete = false;
for (unsigned int i = 0; i <= p_pmt_decoder->i_last_section_number; i++)
{
if (!p_pmt_decoder->ap_sections[i])
break;
if (i == p_pmt_decoder->i_last_section_number)
b_complete = true;
}
return b_complete;
}
static bool dvbpsi_AddSectionPMT(dvbpsi_t *p_dvbpsi, dvbpsi_pmt_decoder_t *p_pmt_decoder,
dvbpsi_psi_section_t* p_section)
{
assert(p_dvbpsi);
assert(p_pmt_decoder);
assert(p_section);
/* Initialize the structures if it's the first section received */
if (p_pmt_decoder->p_building_pmt == NULL)
{
p_pmt_decoder->p_building_pmt = dvbpsi_NewPMT(p_pmt_decoder->i_program_number,
p_section->i_version, p_section->b_current_next,
((uint16_t)(p_section->p_payload_start[0] & 0x1f) << 8)
| p_section->p_payload_start[1]);
if (p_pmt_decoder->p_building_pmt == NULL)
return false;
p_pmt_decoder->i_last_section_number = p_section->i_last_number;
}
/* Fill the section array */
if (p_pmt_decoder->ap_sections[p_section->i_number] != NULL)
{
dvbpsi_debug(p_dvbpsi, "PMT decoder", "overwrite section number %d",
p_section->i_number);
dvbpsi_DeletePSISections(p_pmt_decoder->ap_sections[p_section->i_number]);
}
p_pmt_decoder->ap_sections[p_section->i_number] = p_section;
return true;
}
/*****************************************************************************
* dvbpsi_GatherPMTSections
*****************************************************************************
......@@ -273,7 +376,7 @@ void dvbpsi_GatherPMTSections(dvbpsi_t *p_dvbpsi, dvbpsi_psi_section_t* p_sectio
dvbpsi_pmt_decoder_t* p_pmt_decoder = (dvbpsi_pmt_decoder_t*)p_dvbpsi->p_private;
assert(p_pmt_decoder);
/* Now if b_append is true then we have a valid PMT section */
/* We have a valid PMT section */
if (p_pmt_decoder->i_program_number != p_section->i_extension)
{
/* Invalid program_number */
......@@ -282,12 +385,10 @@ void dvbpsi_GatherPMTSections(dvbpsi_t *p_dvbpsi, dvbpsi_psi_section_t* p_sectio
return;
}
bool b_reinit = false;
/* TS discontinuity check */
if (p_pmt_decoder->b_discontinuity)
{
b_reinit = true;
dvbpsi_ReInitPMT(p_pmt_decoder, true);
p_pmt_decoder->b_discontinuity = false;
}
else
......@@ -295,21 +396,8 @@ void dvbpsi_GatherPMTSections(dvbpsi_t *p_dvbpsi, dvbpsi_psi_section_t* p_sectio
/* Perform some few sanity checks */
if (p_pmt_decoder->p_building_pmt)
{
if (p_pmt_decoder->p_building_pmt->i_version != p_section->i_version)
{
/* version_number */
dvbpsi_error(p_dvbpsi, "PMT decoder", "'version_number' differs"
" whereas no discontinuity has occured");
b_reinit = true;
}
else if (p_pmt_decoder->i_last_section_number
!= p_section->i_last_number)
{
/* last_section_number */
dvbpsi_error(p_dvbpsi, "PMT decoder", "'last_section_number' differs"
" whereas no discontinuity has occured");
b_reinit = true;
}
if (dvbpsi_CheckPMT(p_dvbpsi, p_section))
dvbpsi_ReInitPMT(p_pmt_decoder, true);
}
else
{
......@@ -328,75 +416,19 @@ void dvbpsi_GatherPMTSections(dvbpsi_t *p_dvbpsi, dvbpsi_psi_section_t* p_sectio
}
}
/* Reinit the decoder if wanted */
if (b_reinit)
{
/* Force redecoding */
p_pmt_decoder->b_current_valid = false;
/* Free structures */
if (p_pmt_decoder->p_building_pmt)
{
free(p_pmt_decoder->p_building_pmt);
p_pmt_decoder->p_building_pmt = NULL;
}
/* Clear the section array */
for (unsigned int i = 0; i <= 255; i++)
{
if (p_pmt_decoder->ap_sections[i] != NULL)
{
dvbpsi_DeletePSISections(p_pmt_decoder->ap_sections[i]);
p_pmt_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_pmt_decoder->p_building_pmt)
/* Add section to PMT */
if (!dvbpsi_AddSectionPMT(p_dvbpsi, p_pmt_decoder, p_section))
{
p_pmt_decoder->p_building_pmt =
(dvbpsi_pmt_t*)malloc(sizeof(dvbpsi_pmt_t));
if (p_pmt_decoder->p_building_pmt)
dvbpsi_InitPMT(p_pmt_decoder->p_building_pmt,
p_pmt_decoder->i_program_number,
p_section->i_version,
p_section->b_current_next,
((uint16_t)(p_section->p_payload_start[0] & 0x1f) << 8)
| p_section->p_payload_start[1]);
else
{
dvbpsi_debug(p_dvbpsi, "PMT decoder", "failed decoding section");
dvbpsi_DeletePSISections(p_section);
return;
}
p_pmt_decoder->i_last_section_number = p_section->i_last_number;
}
/* Fill the section array */
if (p_pmt_decoder->ap_sections[p_section->i_number] != NULL)
{
dvbpsi_debug(p_dvbpsi, "PMT decoder", "overwrite section number %d",
p_section->i_number);
dvbpsi_DeletePSISections(p_pmt_decoder->ap_sections[p_section->i_number]);
dvbpsi_error(p_dvbpsi, "PMT decoder", "failed decoding section %d",
p_section->i_number);
dvbpsi_DeletePSISections(p_section);
return;
}
p_pmt_decoder->ap_sections[p_section->i_number] = p_section;
/* Check if we have all the sections */
for (unsigned int i = 0; i <= p_pmt_decoder->i_last_section_number; i++)
if (dvbpsi_IsCompletePMT(p_pmt_decoder))
{
if (!p_pmt_decoder->ap_sections[i])
break;
if (i == p_pmt_decoder->i_last_section_number)
b_complete = true;
}
assert(p_pmt_decoder->pf_pmt_callback);
if (b_complete)
{
/* Save the current information */
p_pmt_decoder->current_pmt = *p_pmt_decoder->p_building_pmt;
p_pmt_decoder->b_current_valid = true;
......@@ -417,9 +449,7 @@ void dvbpsi_GatherPMTSections(dvbpsi_t *p_dvbpsi, dvbpsi_psi_section_t* p_sectio
p_pmt_decoder->pf_pmt_callback(p_pmt_decoder->p_cb_data,
p_pmt_decoder->p_building_pmt);
/* Reinitialize the structures */
p_pmt_decoder->p_building_pmt = NULL;
for (unsigned int i = 0; i <= p_pmt_decoder->i_last_section_number; i++)
p_pmt_decoder->ap_sections[i] = NULL;
dvbpsi_ReInitPMT(p_pmt_decoder, false);
}
}
......
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