static int flashsv_decode_frame(AVCodecContext *avctx,

                                    void *data, int *data_size,

                                    AVPacket *avpkt)

{

    const uint8_t *buf = avpkt->data;

    int buf_size = avpkt->size;

    FlashSVContext *s = avctx->priv_data;

    int h_blocks, v_blocks, h_part, v_part, i, j;

    GetBitContext gb;



    /* no supplementary picture */

    if (buf_size == 0)

        return 0;





    init_get_bits(&gb, buf, buf_size * 8);



    /* start to parse the bitstream */

    s->block_width = 16* (get_bits(&gb, 4)+1);

    s->image_width =     get_bits(&gb,12);

    s->block_height= 16* (get_bits(&gb, 4)+1);

    s->image_height=     get_bits(&gb,12);



    /* calculate amount of blocks and the size of the border blocks */

    h_blocks = s->image_width / s->block_width;

    h_part = s->image_width % s->block_width;

    v_blocks = s->image_height / s->block_height;

    v_part = s->image_height % s->block_height;



    /* the block size could change between frames, make sure the buffer

     * is large enough, if not, get a larger one */

    if(s->block_size < s->block_width*s->block_height) {

        if (s->tmpblock != NULL)

            av_free(s->tmpblock);

        if ((s->tmpblock = av_malloc(3*s->block_width*s->block_height)) == NULL) {

            av_log(avctx, AV_LOG_ERROR, "Can't allocate decompression buffer.\n");


        }

    }

    s->block_size = s->block_width*s->block_height;



    /* init the image size once */

    if((avctx->width==0) && (avctx->height==0)){

        avctx->width = s->image_width;

        avctx->height = s->image_height;

    }



    /* check for changes of image width and image height */

    if ((avctx->width != s->image_width) || (avctx->height != s->image_height)) {

        av_log(avctx, AV_LOG_ERROR, "Frame width or height differs from first frames!\n");

        av_log(avctx, AV_LOG_ERROR, "fh = %d, fv %d  vs  ch = %d, cv = %d\n",avctx->height,

        avctx->width,s->image_height,s->image_width);


    }



    av_log(avctx, AV_LOG_DEBUG, "image: %dx%d block: %dx%d num: %dx%d part: %dx%d\n",

        s->image_width, s->image_height, s->block_width, s->block_height,

        h_blocks, v_blocks, h_part, v_part);



    s->frame.reference = 1;

    s->frame.buffer_hints = FF_BUFFER_HINTS_VALID | FF_BUFFER_HINTS_PRESERVE | FF_BUFFER_HINTS_REUSABLE;

    if(avctx->reget_buffer(avctx, &s->frame) < 0){

      av_log(avctx, AV_LOG_ERROR, "reget_buffer() failed\n");


    }



    /* loop over all block columns */

    for (j = 0; j < v_blocks + (v_part?1:0); j++)

    {



        int hp = j*s->block_height; // horiz position in frame

        int hs = (j<v_blocks)?s->block_height:v_part; // size of block





        /* loop over all block rows */

        for (i = 0; i < h_blocks + (h_part?1:0); i++)

        {

            int wp = i*s->block_width; // vert position in frame

            int ws = (i<h_blocks)?s->block_width:h_part; // size of block



            /* get the size of the compressed zlib chunk */

            int size = get_bits(&gb, 16);

            if (8 * size > get_bits_left(&gb)) {

                avctx->release_buffer(avctx, &s->frame);

                s->frame.data[0] = NULL;


            }



            if (size == 0) {

                /* no change, don't do anything */

            } else {

                /* decompress block */

                int ret = inflateReset(&(s->zstream));

                if (ret != Z_OK)

                {

                    av_log(avctx, AV_LOG_ERROR, "error in decompression (reset) of block %dx%d\n", i, j);

                    /* return -1; */

                }

                s->zstream.next_in = buf+(get_bits_count(&gb)/8);

                s->zstream.avail_in = size;

                s->zstream.next_out = s->tmpblock;

                s->zstream.avail_out = s->block_size*3;

                ret = inflate(&(s->zstream), Z_FINISH);

                if (ret == Z_DATA_ERROR)

                {

                    av_log(avctx, AV_LOG_ERROR, "Zlib resync occurred\n");

                    inflateSync(&(s->zstream));

                    ret = inflate(&(s->zstream), Z_FINISH);

                }



                if ((ret != Z_OK) && (ret != Z_STREAM_END))

                {

                    av_log(avctx, AV_LOG_ERROR, "error in decompression of block %dx%d: %d\n", i, j, ret);

                    /* return -1; */

                }

                copy_region(s->tmpblock, s->frame.data[0], s->image_height-(hp+hs+1), wp, hs, ws, s->frame.linesize[0]);

                skip_bits_long(&gb, 8*size);   /* skip the consumed bits */

            }

        }

    }



    *data_size = sizeof(AVFrame);

    *(AVFrame*)data = s->frame;



    if ((get_bits_count(&gb)/8) != buf_size)

        av_log(avctx, AV_LOG_ERROR, "buffer not fully consumed (%d != %d)\n",

            buf_size, (get_bits_count(&gb)/8));



    /* report that the buffer was completely consumed */

    return buf_size;

}
static int flashsv_decode_frame(AVCodecContext *avctx,

                                    void *data, int *data_size,

                                    AVPacket *avpkt)

{

    const uint8_t *buf = avpkt->data;

    int buf_size = avpkt->size;

    FlashSVContext *s = avctx->priv_data;

    int h_blocks, v_blocks, h_part, v_part, i, j;

    GetBitContext gb;



    

    if (buf_size == 0)

        return 0;





    init_get_bits(&gb, buf, buf_size * 8);



    

    s->block_width = 16* (get_bits(&gb, 4)+1);

    s->image_width =     get_bits(&gb,12);

    s->block_height= 16* (get_bits(&gb, 4)+1);

    s->image_height=     get_bits(&gb,12);



    

    h_blocks = s->image_width / s->block_width;

    h_part = s->image_width % s->block_width;

    v_blocks = s->image_height / s->block_height;

    v_part = s->image_height % s->block_height;



    



    if(s->block_size < s->block_width*s->block_height) {

        if (s->tmpblock != NULL)

            av_free(s->tmpblock);

        if ((s->tmpblock = av_malloc(3*s->block_width*s->block_height)) == NULL) {

            av_log(avctx, AV_LOG_ERROR, "Can't allocate decompression buffer.\n");


        }

    }

    s->block_size = s->block_width*s->block_height;



    

    if((avctx->width==0) && (avctx->height==0)){

        avctx->width = s->image_width;

        avctx->height = s->image_height;

    }



    

    if ((avctx->width != s->image_width) || (avctx->height != s->image_height)) {

        av_log(avctx, AV_LOG_ERROR, "Frame width or height differs from first frames!\n");

        av_log(avctx, AV_LOG_ERROR, "fh = %d, fv %d  vs  ch = %d, cv = %d\n",avctx->height,

        avctx->width,s->image_height,s->image_width);


    }



    av_log(avctx, AV_LOG_DEBUG, "image: %dx%d block: %dx%d num: %dx%d part: %dx%d\n",

        s->image_width, s->image_height, s->block_width, s->block_height,

        h_blocks, v_blocks, h_part, v_part);



    s->frame.reference = 1;

    s->frame.buffer_hints = FF_BUFFER_HINTS_VALID | FF_BUFFER_HINTS_PRESERVE | FF_BUFFER_HINTS_REUSABLE;

    if(avctx->reget_buffer(avctx, &s->frame) < 0){

      av_log(avctx, AV_LOG_ERROR, "reget_buffer() failed\n");


    }



    

    for (j = 0; j < v_blocks + (v_part?1:0); j++)

    {



        int hp = j*s->block_height; 

        int hs = (j<v_blocks)?s->block_height:v_part; 





        

        for (i = 0; i < h_blocks + (h_part?1:0); i++)

        {

            int wp = i*s->block_width; 

            int ws = (i<h_blocks)?s->block_width:h_part; 



            

            int size = get_bits(&gb, 16);

            if (8 * size > get_bits_left(&gb)) {

                avctx->release_buffer(avctx, &s->frame);

                s->frame.data[0] = NULL;


            }



            if (size == 0) {

                

            } else {

                

                int ret = inflateReset(&(s->zstream));

                if (ret != Z_OK)

                {

                    av_log(avctx, AV_LOG_ERROR, "error in decompression (reset) of block %dx%d\n", i, j);

                    

                }

                s->zstream.next_in = buf+(get_bits_count(&gb)/8);

                s->zstream.avail_in = size;

                s->zstream.next_out = s->tmpblock;

                s->zstream.avail_out = s->block_size*3;

                ret = inflate(&(s->zstream), Z_FINISH);

                if (ret == Z_DATA_ERROR)

                {

                    av_log(avctx, AV_LOG_ERROR, "Zlib resync occurred\n");

                    inflateSync(&(s->zstream));

                    ret = inflate(&(s->zstream), Z_FINISH);

                }



                if ((ret != Z_OK) && (ret != Z_STREAM_END))

                {

                    av_log(avctx, AV_LOG_ERROR, "error in decompression of block %dx%d: %d\n", i, j, ret);

                    

                }

                copy_region(s->tmpblock, s->frame.data[0], s->image_height-(hp+hs+1), wp, hs, ws, s->frame.linesize[0]);

                skip_bits_long(&gb, 8*size);   

            }

        }

    }



    *data_size = sizeof(AVFrame);

    *(AVFrame*)data = s->frame;



    if ((get_bits_count(&gb)/8) != buf_size)

        av_log(avctx, AV_LOG_ERROR, "buffer not fully consumed (%d != %d)\n",

            buf_size, (get_bits_count(&gb)/8));



    

    return buf_size;

}
static int FUNC_0(AVCodecContext *VAR_0,

                                    void *VAR_1, int *VAR_2,

                                    AVPacket *VAR_3)

{

    const uint8_t *VAR_4 = VAR_3->VAR_1;

    int VAR_5 = VAR_3->VAR_16;

    FlashSVContext *s = VAR_0->priv_data;

    int VAR_6, VAR_7, VAR_8, VAR_9, VAR_10, VAR_11;

    GetBitContext gb;



    

    if (VAR_5 == 0)

        return 0;





    init_get_bits(&gb, VAR_4, VAR_5 * 8);



    

    s->block_width = 16* (get_bits(&gb, 4)+1);

    s->image_width =     get_bits(&gb,12);

    s->block_height= 16* (get_bits(&gb, 4)+1);

    s->image_height=     get_bits(&gb,12);



    

    VAR_6 = s->image_width / s->block_width;

    VAR_8 = s->image_width % s->block_width;

    VAR_7 = s->image_height / s->block_height;

    VAR_9 = s->image_height % s->block_height;



    



    if(s->block_size < s->block_width*s->block_height) {

        if (s->tmpblock != NULL)

            av_free(s->tmpblock);

        if ((s->tmpblock = av_malloc(3*s->block_width*s->block_height)) == NULL) {

            av_log(VAR_0, AV_LOG_ERROR, "Can't allocate decompression buffer.\n");


        }

    }

    s->block_size = s->block_width*s->block_height;



    

    if((VAR_0->width==0) && (VAR_0->height==0)){

        VAR_0->width = s->image_width;

        VAR_0->height = s->image_height;

    }



    

    if ((VAR_0->width != s->image_width) || (VAR_0->height != s->image_height)) {

        av_log(VAR_0, AV_LOG_ERROR, "Frame width or height differs from first frames!\n");

        av_log(VAR_0, AV_LOG_ERROR, "fh = %d, fv %d  vs  ch = %d, cv = %d\n",VAR_0->height,

        VAR_0->width,s->image_height,s->image_width);


    }



    av_log(VAR_0, AV_LOG_DEBUG, "image: %dx%d block: %dx%d num: %dx%d part: %dx%d\n",

        s->image_width, s->image_height, s->block_width, s->block_height,

        VAR_6, VAR_7, VAR_8, VAR_9);



    s->frame.reference = 1;

    s->frame.buffer_hints = FF_BUFFER_HINTS_VALID | FF_BUFFER_HINTS_PRESERVE | FF_BUFFER_HINTS_REUSABLE;

    if(VAR_0->reget_buffer(VAR_0, &s->frame) < 0){

      av_log(VAR_0, AV_LOG_ERROR, "reget_buffer() failed\n");


    }



    

    for (VAR_11 = 0; VAR_11 < VAR_7 + (VAR_9?1:0); VAR_11++)

    {



        int VAR_12 = VAR_11*s->block_height; 

        int VAR_13 = (VAR_11<VAR_7)?s->block_height:VAR_9; 





        

        for (VAR_10 = 0; VAR_10 < VAR_6 + (VAR_8?1:0); VAR_10++)

        {

            int VAR_14 = VAR_10*s->block_width; 

            int VAR_15 = (VAR_10<VAR_6)?s->block_width:VAR_8; 



            

            int VAR_16 = get_bits(&gb, 16);

            if (8 * VAR_16 > get_bits_left(&gb)) {

                VAR_0->release_buffer(VAR_0, &s->frame);

                s->frame.VAR_1[0] = NULL;


            }



            if (VAR_16 == 0) {

                

            } else {

                

                int VAR_17 = inflateReset(&(s->zstream));

                if (VAR_17 != Z_OK)

                {

                    av_log(VAR_0, AV_LOG_ERROR, "error in decompression (reset) of block %dx%d\n", VAR_10, VAR_11);

                    

                }

                s->zstream.next_in = VAR_4+(get_bits_count(&gb)/8);

                s->zstream.avail_in = VAR_16;

                s->zstream.next_out = s->tmpblock;

                s->zstream.avail_out = s->block_size*3;

                VAR_17 = inflate(&(s->zstream), Z_FINISH);

                if (VAR_17 == Z_DATA_ERROR)

                {

                    av_log(VAR_0, AV_LOG_ERROR, "Zlib resync occurred\n");

                    inflateSync(&(s->zstream));

                    VAR_17 = inflate(&(s->zstream), Z_FINISH);

                }



                if ((VAR_17 != Z_OK) && (VAR_17 != Z_STREAM_END))

                {

                    av_log(VAR_0, AV_LOG_ERROR, "error in decompression of block %dx%d: %d\n", VAR_10, VAR_11, VAR_17);

                    

                }

                copy_region(s->tmpblock, s->frame.VAR_1[0], s->image_height-(VAR_12+VAR_13+1), VAR_14, VAR_13, VAR_15, s->frame.linesize[0]);

                skip_bits_long(&gb, 8*VAR_16);   

            }

        }

    }



    *VAR_2 = sizeof(AVFrame);

    *(AVFrame*)VAR_1 = s->frame;



    if ((get_bits_count(&gb)/8) != VAR_5)

        av_log(VAR_0, AV_LOG_ERROR, "buffer not fully consumed (%d != %d)\n",

            VAR_5, (get_bits_count(&gb)/8));



    

    return VAR_5;

}
static int FUNC_0(AVCodecContext *VAR_0,
void *VAR_1, int *VAR_2,
AVPacket *VAR_3)
{ const uint8_t *VAR_4 = VAR_3->VAR_1; int VAR_5 = VAR_3->VAR_16; FlashSVContext *s = VAR_0->priv_data; int VAR_6, VAR_7, VAR_8, VAR_9, VAR_10, VAR_11; GetBitContext gb; if (VAR_5 == 0)
return 0; init_get_bits(&gb, VAR_4, VAR_5 * 8); s->block_width = 16* (get_bits(&gb, 4)+1); s->image_width =     get_bits(&gb,12); s->block_height= 16* (get_bits(&gb, 4)+1); s->image_height=     get_bits(&gb,12); VAR_6 = s->image_width / s->block_width; VAR_8 = s->image_width % s->block_width; VAR_7 = s->image_height / s->block_height; VAR_9 = s->image_height % s->block_height; if(s->block_size < s->block_width*s->block_height) { if (s->tmpblock != NULL)
av_free(s->tmpblock); if ((s->tmpblock = av_malloc(3*s->block_width*s->block_height)) == NULL) { av_log(VAR_0, AV_LOG_ERROR, "Can't allocate decompression buffer.\n"); } } s->block_size = s->block_width*s->block_height; if((VAR_0->width==0) && (VAR_0->height==0)){ VAR_0->width = s->image_width; VAR_0->height = s->image_height; } if ((VAR_0->width != s->image_width) || (VAR_0->height != s->image_height)) { av_log(VAR_0, AV_LOG_ERROR, "Frame width or height differs from first frames!\n"); av_log(VAR_0, AV_LOG_ERROR, "fh = %d, fv %d  vs  ch = %d, cv = %d\n",VAR_0->height,
VAR_0->width,s->image_height,s->image_width); } av_log(VAR_0, AV_LOG_DEBUG, "image: %dx%d block: %dx%d num: %dx%d part: %dx%d\n",
s->image_width, s->image_height, s->block_width, s->block_height,
VAR_6, VAR_7, VAR_8, VAR_9); s->frame.reference = 1; s->frame.buffer_hints = FF_BUFFER_HINTS_VALID | FF_BUFFER_HINTS_PRESERVE | FF_BUFFER_HINTS_REUSABLE; if(VAR_0->reget_buffer(VAR_0, &s->frame) < 0){ av_log(VAR_0, AV_LOG_ERROR, "reget_buffer() failed\n"); } for (VAR_11 = 0; VAR_11 < VAR_7 + (VAR_9?1:0); VAR_11++) { int VAR_12 = VAR_11*s->block_height; int VAR_13 = (VAR_11<VAR_7)?s->block_height:VAR_9; for (VAR_10 = 0; VAR_10 < VAR_6 + (VAR_8?1:0); VAR_10++) { int VAR_14 = VAR_10*s->block_width; int VAR_15 = (VAR_10<VAR_6)?s->block_width:VAR_8; int VAR_16 = get_bits(&gb, 16); if (8 * VAR_16 > get_bits_left(&gb)) { VAR_0->release_buffer(VAR_0, &s->frame); s->frame.VAR_1[0] = NULL; } if (VAR_16 == 0) { } else { int VAR_17 = inflateReset(&(s->zstream)); if (VAR_17 != Z_OK)
{ av_log(VAR_0, AV_LOG_ERROR, "error in decompression (reset) of block %dx%d\n", VAR_10, VAR_11); } s->zstream.next_in = VAR_4+(get_bits_count(&gb)/8); s->zstream.avail_in = VAR_16; s->zstream.next_out = s->tmpblock; s->zstream.avail_out = s->block_size*3; VAR_17 = inflate(&(s->zstream), Z_FINISH); if (VAR_17 == Z_DATA_ERROR)
{ av_log(VAR_0, AV_LOG_ERROR, "Zlib resync occurred\n"); inflateSync(&(s->zstream)); VAR_17 = inflate(&(s->zstream), Z_FINISH); } if ((VAR_17 != Z_OK) && (VAR_17 != Z_STREAM_END))
{ av_log(VAR_0, AV_LOG_ERROR, "error in decompression of block %dx%d: %d\n", VAR_10, VAR_11, VAR_17); } copy_region(s->tmpblock, s->frame.VAR_1[0], s->image_height-(VAR_12+VAR_13+1), VAR_14, VAR_13, VAR_15, s->frame.linesize[0]); skip_bits_long(&gb, 8*VAR_16); } } } *VAR_2 = sizeof(AVFrame); *(AVFrame*)VAR_1 = s->frame; if ((get_bits_count(&gb)/8) != VAR_5)
av_log(VAR_0, AV_LOG_ERROR, "buffer not fully consumed (%d != %d)\n",
VAR_5, (get_bits_count(&gb)/8)); return VAR_5; }