video_dec_buffer_manager.c

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/*****************************************************************************
*  Copyright Statement:
*  --------------------
*  This software is protected by Copyright and the information contained
*  herein is confidential. The software may not be copied and the information
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*  permission of MediaTek Inc. (C) 2005
*
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/*****************************************************************************
 *
 * Filename:
 * ---------
 *   video_dec_buffer_manager.c
 *
 * Project:
 * --------
 *		MT6218B and MT6219
 *
 * Description:
 * ------------
 *   This file defines buffer management APIs of mpeg4 decode.
 *
 * Author:
 * -------
 * -------
 *
 *============================================================================
 *             HISTORY
 * Below this line, this part is controlled by PVCS VM. DO NOT MODIFY!!
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 *============================================================================
 ****************************************************************************/
#ifdef MP4_CODEC
#include "drv_comm.h"
#include "med_status.h"
#include "visual_comm.h"
#include "fsal.h"
#include "mp4_parser.h"
#include "l1audio.h"
#include "lcd_if.h"
#include "rtc_sw.h"
#include "video_file_creator.h"
#include "bmd.h"
#include "video_enc_glb.h"
#include "video_dec_glb.h"
#include "video_glb.h"
#include "stack_common.h"
#include "syscomp_config.h" /*MOD_BMT*/
#include "stack_msgs.h"
#include "app_ltlcom.h"      /* Task message communiction */
#include "stacklib.h"          /* Basic type for dll, evshed, stacktimer */
#include "event_shed.h"     /* Event scheduler */
#include "stack_timer.h"     /*Timer*/
#include "app_buff_alloc.h" /*buffer*/
#include "task_config.h"     /* Task creation */
#include "stack_ltlcom.h"   /*msg_send_ext_queue.....definitions*/
#include "intrCtrl.h"
#include "video_hw.h"

/* mutex can not be dynamic allocated */
static kal_mutexid  g_video_dec_buffer_mutex;
/* frame buffer manager uses array, so alloacte it only when used */
static VIDEO_DEC_BUFFER_MGR_STRUCT *g_video_dec_buffer_mgr_ptr;


/* Config and init buffer management.
*   It should be executed in task level. It may be configured according to differnet application
* @param cb_info buffer senario and callback function information
* @return None
*/
void video_dec_config_buffer(VIDEO_DEC_BUFFER_CB_STRUCT cb_info)
{
    kal_uint32 index;

    kal_uint8 *buffer_addr;
    kal_uint32 buffer_count = 0;
    kal_uint32 buffer_size = 0;
    kal_uint8 *current_buffer_addr;
    kal_uint32 buffer_addr_offset;

    if (kal_if_hisr() == KAL_TRUE)
        EXT_ASSERT(0, 0, 0, 0);

    /* Get control variable memory */
    g_video_dec_buffer_mgr_ptr = (VIDEO_DEC_BUFFER_MGR_STRUCT *)extmem_get_buffer(sizeof(VIDEO_DEC_BUFFER_MGR_STRUCT));

    /* Get real buffer memory */
    if(cb_info.scenario == VIDEO_DEC_BUFFER_SCENARIO_EDITOR)
    {
    #if defined(__VIDEO_EDITOR__)
        buffer_size = VIDEO_EDITOR_DEC_BUFFER_SIZE * VIDEO_EDITOR_DEC_BUFFER_COUNT;
        buffer_count = VIDEO_EDITOR_DEC_BUFFER_COUNT;
    #else
        ASSERT(0);
    #endif
    }
    else if( cb_info.scenario == VIDEO_DEC_BUFFER_SCENARIO_FILE)
    {
        buffer_size = VIDEO_DEC_BUFFER_SIZE * VIDEO_DEC_BUFFER_COUNT;
        buffer_count = VIDEO_DEC_BUFFER_COUNT;
    }    
    else
    {
        /* Not support */
        EXT_ASSERT(0, (kal_uint32)cb_info.scenario, 0, 0);
    }
    buffer_addr = (kal_uint8 *)extmem_get_buffer(buffer_size);
    if ((buffer_count > VIDEO_DEC_MAX_BUFFER_COUNT) || (buffer_addr == NULL))
            EXT_ASSERT(0, buffer_count, (kal_uint32)buffer_addr, (kal_uint32)cb_info.scenario);

    /* Init mutex */
    if (g_video_dec_buffer_mutex == 0)
        g_video_dec_buffer_mutex = kal_create_mutex("VIDEO_DEC_BUFFER_MUTEX");

    kal_take_mutex(g_video_dec_buffer_mutex);

    /* Init parameters */	
    g_video_dec_buffer_mgr_ptr->send_ilm = KAL_TRUE;
    g_video_dec_buffer_mgr_ptr->b_data_empty = KAL_FALSE;
    g_video_dec_buffer_mgr_ptr->cb_info.scenario = cb_info.scenario;
    g_video_dec_buffer_mgr_ptr->cb_info.callback = cb_info.callback;
    g_video_dec_buffer_mgr_ptr->cb_info.event_id = cb_info.event_id;
    g_video_dec_buffer_mgr_ptr->buffer_count = buffer_count;
    g_video_dec_buffer_mgr_ptr->buffer_start_addr = buffer_addr;
    current_buffer_addr = buffer_addr;
    buffer_addr_offset = buffer_size / buffer_count;

    for (index = 0; index < g_video_dec_buffer_mgr_ptr->buffer_count; index++)
    {
        g_video_dec_buffer_mgr_ptr->DEC_BUFFER[index].buffer = current_buffer_addr;
        g_video_dec_buffer_mgr_ptr->DEC_BUFFER[index].buffer_length = buffer_addr_offset;
        current_buffer_addr += buffer_addr_offset;
    }

    kal_give_mutex(g_video_dec_buffer_mutex);
}


/* Cancel the current put buffer action. If driver decides to stop, but task is still get data from file system to buffer.
*   It can stop put buffer as quickly as possible
* @param None
* @return None
*/
void video_dec_cancel_put_buffer(void)
{
    	g_video_dec_buffer_mgr_ptr->cancel_put_buffer = KAL_TRUE;
}


/* Clear all the buffers. Only clear the control parameter is enough.
*   It should be executed in task level.
* @param start_frame_no. the start frame that shuld be prepared
* @param end_frame_no. the end frame that shuld be prepared 
* @return None
*/
void video_dec_clr_buffer(kal_uint32 start_frame_no, kal_uint32 end_frame_no)
{
    kal_uint32 index;

    if (kal_if_hisr() == KAL_TRUE)
        EXT_ASSERT(0, 0, 0, 0);
    
    /* Only support these two scenario */
    if( (g_video_dec_buffer_mgr_ptr->cb_info.scenario != VIDEO_DEC_BUFFER_SCENARIO_FILE)
    	&& (g_video_dec_buffer_mgr_ptr->cb_info.scenario != VIDEO_DEC_BUFFER_SCENARIO_EDITOR))
    {
        EXT_ASSERT(0, (kal_uint32)g_video_dec_buffer_mgr_ptr->cb_info.scenario, 0, 0);
    }

    /* set cancel buffer as true first, so that if another task is putting frame to buffer at the same time and task the mutex, 
        it will stop put frame and give mutex */
    g_video_dec_buffer_mgr_ptr->cancel_put_buffer = KAL_TRUE;

    kal_take_mutex(g_video_dec_buffer_mutex);