vdec/src/ts_parser.cpp

/*--------------------------------------------------------------------------
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    * Redistributions of source code must retain the above copyright
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      notice, this list of conditions and the following disclaimer in the
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      the names of its contributors may be used to endorse or promote
      products derived from this software without specific prior written
      permission.

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--------------------------------------------------------------------------*/
#include "ts_parser.h"
#include "vidc_debug.h"

#define DEBUG DEBUG_PRINT_ERROR

void omx_time_stamp_reorder::set_timestamp_reorder_mode(bool mode)
{
    reorder_ts = mode;
}

void omx_time_stamp_reorder::enable_debug_print(bool flag)
{
    print_debug = flag;
}

omx_time_stamp_reorder::~omx_time_stamp_reorder()
{
    delete_list();
}

omx_time_stamp_reorder::omx_time_stamp_reorder()
{
    reorder_ts = false;
    phead = pcurrent = NULL;
    error = false;
    print_debug = false;
}

void omx_time_stamp_reorder::delete_list()
{
    time_stamp_list *ptemp;

    if (!phead) return;

    while (phead->next != phead) {
        ptemp = phead;
        phead = phead->next;
        phead->prev = ptemp->prev;
        ptemp->prev->next = phead;
        delete ptemp;
    }

    delete phead;
    phead = NULL;
}

bool omx_time_stamp_reorder::get_current_list()
{
    if (!phead) {
        if (!add_new_list()) {
            handle_error();
            return false;
        }
    }

    pcurrent = phead->prev;
    return true;
}

bool omx_time_stamp_reorder::update_head()
{
    time_stamp_list *ptemp;

    if (!phead) return false;

    if (phead->next != phead) {
        ptemp = phead;
        phead = ptemp->next;
        phead->prev = ptemp->prev;
        ptemp->prev->next = phead;
        delete ptemp;
    }

    return true;
}

bool omx_time_stamp_reorder::add_new_list()
{
    bool status = true;
    time_stamp_list *ptemp = NULL;

    if (!phead) {
        ptemp = phead = new time_stamp_list;

        if (!phead) {
            handle_error();
            status = false;
            return status;
        }

        phead->prev = phead->next = phead;
    } else {
        ptemp = new time_stamp_list;

        if (!ptemp) {
            handle_error();
            status = false;
            return status;
        }

        ptemp->prev = phead->prev;
        ptemp->next = phead;
        phead->prev->next = ptemp;
        phead->prev = ptemp;
    }

    ptemp->entries_filled = 0;

    for (int i=0; i < TIME_SZ; i++) {
        ptemp->input_timestamps[i].in_use = false;
        ptemp->input_timestamps[i].timestamps = -1;
    }

    return status;
}

bool omx_time_stamp_reorder::insert_timestamp(OMX_BUFFERHEADERTYPE *header)
{
    OMX_TICKS *table_entry = NULL;

    if (!reorder_ts || error || !header) {
        if (error || !header)
            DEBUG("Invalid condition in insert_timestamp %p", header);

        return false;
    }

    if (!get_current_list()) {
        handle_error();
        return false;
    }

    if (pcurrent->entries_filled > (TIME_SZ - 1)) {
        DEBUG("Table full return error");
        handle_error();
        return false;
    }

    if (header->nFlags & OMX_BUFFERFLAG_CODECCONFIG) {
        return true;
    }

    if ((header->nFlags & OMX_BUFFERFLAG_EOS) && !header->nFilledLen) {
        DEBUG("EOS with zero length recieved");

        if (!add_new_list()) {
            handle_error();
            return false;
        }

        return true;
    }

    for (int i = 0; i < TIME_SZ && !table_entry; i++) {
        if (!pcurrent->input_timestamps[i].in_use) {
            table_entry = &pcurrent->input_timestamps[i].timestamps;
            pcurrent->input_timestamps[i].in_use = true;
            pcurrent->entries_filled++;
        }
    }

    if (!table_entry) {
        DEBUG("All entries in use");
        handle_error();
        return false;
    }

    *table_entry = header->nTimeStamp;

    if (print_debug)
        DEBUG("Time stamp inserted %lld", header->nTimeStamp);

    if (header->nFlags & OMX_BUFFERFLAG_EOS) {
        if (!add_new_list()) {
            handle_error();
            return false;
        }
    }

    return true;
}

bool omx_time_stamp_reorder::remove_time_stamp(OMX_TICKS ts, bool is_interlaced = false)
{
    unsigned int num_ent_remove = (is_interlaced)?2:1;

    if (!reorder_ts || error) {
        DEBUG("not in avi mode");
        return false;
    }

    if (!phead || !phead->entries_filled) return false;

    for (int i=0; i < TIME_SZ && num_ent_remove; i++) {
        if (phead->input_timestamps[i].in_use && phead->input_timestamps[i].timestamps == ts) {
            phead->input_timestamps[i].in_use = false;
            phead->entries_filled--;
            num_ent_remove--;

            if (print_debug)
                DEBUG("Removed TS %lld", ts);
        }
    }

    if (!phead->entries_filled) {
        if (!update_head()) {
            handle_error();
            return false;
        }
    }

    return true;
}

void omx_time_stamp_reorder::flush_timestamp()
{
    delete_list();
}

bool omx_time_stamp_reorder::get_next_timestamp(OMX_BUFFERHEADERTYPE *header, bool is_interlaced)
{
    timestamp *element = NULL,*duplicate = NULL;
    bool status = false;

    if (!reorder_ts || error || !header) {
        if (error || !header)
            DEBUG("Invalid condition in insert_timestamp %p", header);

        return false;
    }

    if (!phead || !phead->entries_filled) return false;

    for (int i=0; i < TIME_SZ; i++) {
        if (phead->input_timestamps[i].in_use) {
            status = true;

            if (!element)
                element = &phead->input_timestamps[i];
            else {
                if (element->timestamps > phead->input_timestamps[i].timestamps) {
                    element = &phead->input_timestamps[i];
                    duplicate = NULL;
                } else if (element->timestamps == phead->input_timestamps[i].timestamps)
                    duplicate = &phead->input_timestamps[i];
            }
        }
    }

    if (element) {
        phead->entries_filled--;
        header->nTimeStamp = element->timestamps;

        if (print_debug)
            DEBUG("Getnext Time stamp %lld", header->nTimeStamp);

        element->in_use = false;
    }

    if (is_interlaced && duplicate) {
        phead->entries_filled--;
        duplicate->in_use = false;
    } else if (is_interlaced && !duplicate) {
        element = NULL;

        for (int i=0; i < TIME_SZ; i++) {
            if (phead->input_timestamps[i].in_use) {
                if (!element)
                    element = &phead->input_timestamps[i];
                else if (element->timestamps > phead->input_timestamps[i].timestamps)
                    element = &phead->input_timestamps[i];
            }
        }

        if (element) {
            phead->entries_filled--;
            header->nTimeStamp = element->timestamps;
            element->in_use = false;
        }
    }

    if (!phead->entries_filled) {
        if (!update_head()) {
            handle_error();
            return false;
        }
    }

    return status;
}