/* ********************************************************************* *\

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\* ********************************************************************* */

#ifndef HB_QSV_LIBAV_H
#define HB_QSV_LIBAV_H

/**
 * @file
 * @ingroup lavc_codec_hwaccel_qsv
 * Common header for QSV/MediaSDK acceleration
 */

/**
 * @defgroup lavc_codec_hwaccel_qsv QSV/MediaSDK based Decode/Encode and VPP
 * @ingroup lavc_codec_hwaccel
 *
 *  As Intel Quick Sync Video (QSV) can decode/preprocess/encode with HW
 *  acceleration.
 *
 *  Supported features:
 *    - access:
 *      - format AV_PIX_FMT_QSV_H264, AVCodec decoder based implementation
 *      - name "h264_qsv", avcodec_find_decoder_by_name( "h264_qsv")
 *    - IO Pattern:
 *      - Opaque memory: MFX_IOPATTERN_OUT_OPAQUE_MEMORY // Video memory is
 *                       MFX_IMPL_HARDWARE or MFX_IMPL_AUTO and runtime support,
 *                       otherwise: System Memory
 *      - System memory: MFX_IOPATTERN_OUT_SYSTEM_MEMORY
 *    - Allocators:
 *      - default allocator for System memory: MFX_MEMTYPE_SYSTEM_MEMORY
 *    - details:
 *      implementation as "per frame"
 *
 *  TODO list:
 *    - access:
 *      - format AV_PIX_FMT_QSV_MPEG2
 *      - format AV_PIX_FMT_QSV_VC1
 *      - format AV_PIX_FMT_QSV, see "details" below
 *    - IO Pattern:
 *      - VIDEO_MEMORY  // MFX_IOPATTERN_OUT_VIDEO_MEMORY
 *    - Allocators:
 *      - Video memory: MFX_MEMTYPE_VIDEO_MEMORY_DECODER_TARGET /
 *                      MFX_MEMTYPE_VIDEO_MEMORY_PROCESSOR_TARGET
 *    - details:
 *      "per slice" support: AV_PIX_FMT_QSV with AVHWAccel based implementation
 *
 *  Note hb_qsv_config struct required to fill in via
 *  AVCodecContext.hwaccel_context
 *
 *  As per frame, note AVFrame.data[2] (qsv_atom) used for frame atom id,
 *  data/linesize should be used together with SYSTEM_MEMORY and tested
 *
 *  Note: Compilation would require:
 *   - Intel MediaSDK headers, Full SDK is available from the original web site:
 *                     http://software.intel.com/en-us/vcsource/tools/media-SDK
 *     Will be referenced as mfx*.h (mfxdefs.h, mfxstructures.h, ... )
 *  and
 *  - Final application has to link against Intel MediaSDK dispatcher, available
 *     at MediaSDK as well
 *
 *  Target OS: as per available dispatcher and driver support
 *
 *  Implementation details:
 *   Provided struct hb_qsv_context contain several struct hb_qsv_space(s) for decode,
 *   VPP and encode.
 *   hb_qsv_space just contain needed environment for the appropriate action.
 *   Based on this - pipeline (see pipes) will be build to pass details such as
 *   mfxFrameSurface1* and mfxSyncPoint* from one action to the next.
 *
 *  Resources re-usage (hb_qsv_flush_stages):
 *     hb_qsv_context *qsv = (hb_qsv_context *)video_codec_ctx->priv_data;
 *     hb_qsv_list *pipe = (hb_qsv_list *)video_frame->data[2];
 *     hb_qsv_flush_stages( qsv->pipes, &pipe );
 *
 *  DTS re-usage:
 *     hb_qsv_dts_pop(qsv);
 *
 *   for video,DX9/11 memory it has to be Unlock'ed as well
 *
 *  Implementation is thread aware and uses synchronization point(s) from MediaSDK
 *  as per configuration.
 *
 *  For the details of MediaSDK usage and options available - please refer to the
 *  available documentation at MediaSDK.
 *
 *  Feature set used from MSDK is defined by HB_QSV_MSDK_VERSION_MAJOR and
 *  HB_QSV_MSDK_VERSION_MINOR
 *
 * @{
 */

#include <stdint.h>
#include <string.h>
#include "mfx/mfxvideo.h"
#include "libavutil/mem.h"
#include "libavutil/time.h"

#if defined (__GNUC__)
#include <pthread.h>
#define ff_qsv_atomic_inc(ptr) __sync_add_and_fetch(ptr,1)
#define ff_qsv_atomic_dec(ptr) __sync_sub_and_fetch (ptr,1)
#elif HAVE_WINDOWS_H            // MSVC case
#include <windows.h>
#if HAVE_PTHREADS
#include <pthread.h>
#elif HAVE_W32THREADS
#include "w32pthreads.h"
#endif
#define ff_qsv_atomic_inc(ptr) InterlockedIncrement(ptr)
#define ff_qsv_atomic_dec(ptr) InterlockedDecrement (ptr)
#endif


// sleep is defined in milliseconds
#define hb_qsv_sleep(x) av_usleep((x)*1000)

#define HB_QSV_ZERO_MEMORY(VAR)                    {memset(&VAR, 0, sizeof(VAR));}
#define HB_QSV_ALIGN32(X)                      (((mfxU32)((X)+31)) & (~ (mfxU32)31))
#define HB_QSV_ALIGN16(value)                  (((value + 15) >> 4) << 4)
#ifndef HB_QSV_PRINT_RET_MSG
#define HB_QSV_PRINT_RET_MSG(ERR)              { fprintf(stderr, "Error code %d,\t%s\t%d\n", ERR, __FUNCTION__, __LINE__); }
#endif

#ifndef HB_QSV_DEBUG_ASSERT
#define HB_QSV_DEBUG_ASSERT(x,y)               { if ((x)) { fprintf(stderr, "\nASSERT: %s\n", y); } }
#endif

#define HB_QSV_CHECK_RET(P, X, ERR)                {if ((X) > (P)) {HB_QSV_PRINT_RET_MSG(ERR); return;}}
#define HB_QSV_CHECK_RESULT(P, X, ERR)             {if ((X) > (P)) {HB_QSV_PRINT_RET_MSG(ERR); return ERR;}}
#define HB_QSV_CHECK_POINTER(P, ERR)               {if (!(P)) {HB_QSV_PRINT_RET_MSG(ERR); return ERR;}}
#define HB_QSV_IGNORE_MFX_STS(P, X)                {if ((X) == (P)) {P = MFX_ERR_NONE;}}

#define HB_QSV_ID_BUFFER MFX_MAKEFOURCC('B','U','F','F')
#define HB_QSV_ID_FRAME  MFX_MAKEFOURCC('F','R','M','E')

#define HB_QSV_SURFACE_NUM              80
#define HB_QSV_SYNC_NUM                 HB_QSV_SURFACE_NUM*3/4
#define HB_QSV_BUF_SIZE_DEFAULT         4096*2160*10
#define HB_QSV_JOB_SIZE_DEFAULT         10
#define HB_QSV_SYNC_TIME_DEFAULT        10000
// see hb_qsv_get_free_sync, hb_qsv_get_free_surface , 100 if usleep(10*1000)(10ms) == 1 sec
#define HB_QSV_REPEAT_NUM_DEFAULT      100
#define HB_QSV_ASYNC_DEPTH_DEFAULT     4

// version of MSDK/QSV API currently used
#define HB_QSV_MSDK_VERSION_MAJOR  1
#define HB_QSV_MSDK_VERSION_MINOR  3

typedef enum HB_QSV_STAGE_TYPE {

#define HB_QSV_DECODE_MASK   0x001
    HB_QSV_DECODE   = 0x001,

#define HB_QSV_VPP_MASK      0x0F0
    // "Mandatory VPP filter" , might be with "Hint-based VPP filters"
    HB_QSV_VPP_DEFAULT = 0x010,
    // "User Modules" etc
    HB_QSV_VPP_USER = 0x020,

#define av_QSV_ENCODE_MASK   0x100
    HB_QSV_ENCODE   = 0x100
#define HB_QSV_ANY_MASK      0xFFF
} HB_QSV_STAGE_TYPE;


typedef struct hb_qsv_list {
    // practically pthread_mutex_t
    void *mutex;
    pthread_mutexattr_t   mta;

    void **items;
    int items_alloc;

    int items_count;
} hb_qsv_list;

typedef struct hb_qsv_sync {
    mfxSyncPoint*   p_sync;
    int             in_use;
} hb_qsv_sync;

typedef struct hb_qsv_stage {
    HB_QSV_STAGE_TYPE type;
    struct {
        mfxBitstream *p_bs;
        mfxFrameSurface1 *p_surface;
    } in;
    struct {
        mfxBitstream *p_bs;
        mfxFrameSurface1 *p_surface;
        hb_qsv_sync *sync;
    } out;
    hb_qsv_list *pending;
} hb_qsv_stage;

typedef struct hb_qsv_task {
    mfxBitstream *bs;
    hb_qsv_stage *stage;
} hb_qsv_task;


typedef struct hb_qsv_space {

    uint8_t is_init_done;

    HB_QSV_STAGE_TYPE type;

    mfxVideoParam m_mfxVideoParam;

    mfxFrameAllocResponse response;
    mfxFrameAllocRequest request[2];    // [0] - in, [1] - out, if needed

    mfxExtOpaqueSurfaceAlloc ext_opaque_alloc;
    mfxExtBuffer **p_ext_params;
    uint16_t p_ext_param_num;

    uint16_t surface_num_max_used;
    uint16_t surface_num;
    mfxFrameSurface1 *p_surfaces[HB_QSV_SURFACE_NUM];

    uint16_t sync_num_max_used;
    uint16_t sync_num;
    hb_qsv_sync *p_syncp[HB_QSV_SYNC_NUM];

    mfxBitstream bs;
    uint8_t *p_buf;
    size_t p_buf_max_size;

    // only for encode and tasks
    hb_qsv_list *tasks;

    hb_qsv_list *pending;

    // storage for allocations/mfxMemId*
    mfxMemId *mids;
} hb_qsv_space;

typedef struct hb_qsv_context {
    volatile int is_context_active;

    mfxIMPL impl;
    mfxSession mfx_session;
    mfxVersion ver;

    // decode
    hb_qsv_space *dec_space;
    // encode
    hb_qsv_space *enc_space;
    // vpp
    hb_qsv_list *vpp_space;

    hb_qsv_list *pipes;

    // MediaSDK starting from API version 1.6 includes DecodeTimeStamp
    // in addition to TimeStamp
    // see also HB_QSV_MSDK_VERSION_MINOR , HB_QSV_MSDK_VERSION_MAJOR
    hb_qsv_list *dts_seq;

    // practically pthread_mutex_t
    void *qts_seq_mutex;

    int is_anex;

    void *qsv_config;

} hb_qsv_context;

typedef enum {
    QSV_PART_ANY = 0,
    QSV_PART_LOWER,
    QSV_PART_UPPER
} hb_qsv_split;

typedef struct {
    int64_t dts;
} hb_qsv_dts;

typedef struct hb_qsv_alloc_frame {
    mfxU32 id;
    mfxFrameInfo info;
} hb_qsv_alloc_frame;

typedef struct hb_qsv_alloc_buffer {
    mfxU32 id;
    mfxU32 nbytes;
    mfxU16 type;
} hb_qsv_alloc_buffer;

typedef struct hb_qsv_allocators_space {
    hb_qsv_space *space;
    mfxFrameAllocator frame_alloc;
    mfxBufferAllocator buffer_alloc;
} hb_qsv_allocators_space;

typedef struct hb_qsv_config {
    /**
     * Set asynch depth of processing with QSV
     * Format: 0 and more
     *
     * - encoding: Set by user.
     * - decoding: Set by user.
     */
    int async_depth;

    /**
     * Range of numbers that indicate trade-offs between quality and speed.
     * Format: from 1/MFX_TARGETUSAGE_BEST_QUALITY to 7/MFX_TARGETUSAGE_BEST_SPEED inclusive
     *
     * - encoding: Set by user.
     * - decoding: unused
     */
    int target_usage;

    /**
     * Number of reference frames; if NumRefFrame = 0, this parameter is not specified.
     * Format: 0 and more
     *
     * - encoding: Set by user.
     * - decoding: unused
     */
    int num_ref_frame;

    /**
     * Distance between I- or P- key frames; if it is zero, the GOP structure is unspecified.
     * Note: If GopRefDist = 1, there are no B-frames used.
     *
     * - encoding: Set by user.
     * - decoding: unused
     */
     int gop_ref_dist;

    /**
     * Number of pictures within the current GOP (Group of Pictures); if GopPicSize=0,
     * then the GOP size is unspecified. If GopPicSize=1, only I-frames are used.
     *
     * - encoding: Set by user.
     * - decoding: unused
     */
     int gop_pic_size;

    /**
     * Set type of surfaces used with QSV
     * Format: "IOPattern enum" of Media SDK
     *
     * - encoding: Set by user.
     * - decoding: Set by user.
     */
    int io_pattern;

    /**
     * Set amount of additional surfaces might be needed
     * Format: amount of additional buffers(surfaces+syncs)
     * to allocate in advance
     *
     * - encoding: Set by user.
     * - decoding: Set by user.
     */
    int additional_buffers;

    /**
     * If pipeline should be sync.
     * Format: wait time in milliseconds,
     *         HB_QSV_SYNC_TIME_DEFAULT/10000 might be a good value
     *
     * - encoding: Set by user.
     * - decoding: Set by user.
     */
    int sync_need;

    /**
     * Type of implementation needed
     *
     * - encoding: Set by user.
     * - decoding: Set by user.
     */
    int impl_requested;

    /**
     * if QSV usage is multithreaded.
     * Format: Yes/No, 1/0
     *
     * - encoding: Set by user.
     * - decoding: Set by user.
     */
    int usage_threaded;

    /**
     * if QSV use an external allocation (valid per session/mfxSession)
     * Format: pointer to allocators, if default: 0
     *
     * note that:
     * System Memory:   can be used without provided and external allocator,
     *  meaning MediaSDK will use an internal one
     * Video Memory:    in this case - we must provide an external allocator
     * Also, Media SDK session doesn't require external allocator if the application
     *  uses opaque memory
     *
     * Calls SetFrameAllocator/SetBufferAllocator
     * (MFXVideoCORE_SetFrameAllocator/MFXVideoCORE_SetBufferAllocator)
     * are to pass allocators to Media SDK
     *
     * - encoding: Set by user.
     * - decoding: Set by user.
     */
    hb_qsv_allocators_space *allocators;

} hb_qsv_config;

#define ANEX_UNKNOWN    0
#define ANEX_PREFIX     1
#define ANEX_NO_PREFIX  2

static const uint8_t ff_prefix_code[] = { 0x00, 0x00, 0x00, 0x01 };

int hb_qsv_get_free_sync(hb_qsv_space *, hb_qsv_context *);
int hb_qsv_get_free_surface(hb_qsv_space *, hb_qsv_context *, mfxFrameInfo *,
                     hb_qsv_split);
int hb_qsv_get_free_encode_task(hb_qsv_list *);

int av_is_qsv_available(mfxIMPL, mfxVersion *);
void hb_qsv_wait_on_sync(hb_qsv_context *, hb_qsv_stage *);

void hb_qsv_add_context_usage(hb_qsv_context *, int);

void hb_qsv_pipe_list_create(hb_qsv_list **, int);
void hb_qsv_pipe_list_clean(hb_qsv_list **);

void hb_qsv_add_stagee(hb_qsv_list **, hb_qsv_stage *, int);
hb_qsv_stage *hb_qsv_get_last_stage(hb_qsv_list *);
hb_qsv_list *hb_qsv_pipe_by_stage(hb_qsv_list *, hb_qsv_stage *);
void hb_qsv_flush_stages(hb_qsv_list *, hb_qsv_list **);

void hb_qsv_dts_ordered_insert(hb_qsv_context *, int, int, int64_t, int);
void hb_qsv_dts_pop(hb_qsv_context *);

hb_qsv_stage *hb_qsv_stage_init(void);
void hb_qsv_stage_clean(hb_qsv_stage **);
int hb_qsv_context_clean(hb_qsv_context *);

int ff_qsv_is_sync_in_pipe(mfxSyncPoint *, hb_qsv_context *);
int ff_qsv_is_surface_in_pipe(mfxFrameSurface1 *, hb_qsv_context *);

hb_qsv_list *hb_qsv_list_init(int);
int hb_qsv_list_lock(hb_qsv_list *);
int hb_qsv_list_unlock(hb_qsv_list *);
int hb_qsv_list_add(hb_qsv_list *, void *);
void hb_qsv_list_rem(hb_qsv_list *, void *);
void hb_qsv_list_insert(hb_qsv_list *, int, void *);
void hb_qsv_list_close(hb_qsv_list **);

int hb_qsv_list_count(hb_qsv_list *);
void *hb_qsv_list_item(hb_qsv_list *, int);

/* @} */

#endif // HB_QSV_LIBAV_H
