yading@10: /*
yading@10:  * Flash Screen Video decoder
yading@10:  * Copyright (C) 2004 Alex Beregszaszi
yading@10:  * Copyright (C) 2006 Benjamin Larsson
yading@10:  *
yading@10:  * This file is part of FFmpeg.
yading@10:  *
yading@10:  * FFmpeg is free software; you can redistribute it and/or
yading@10:  * modify it under the terms of the GNU Lesser General Public
yading@10:  * License as published by the Free Software Foundation; either
yading@10:  * version 2.1 of the License, or (at your option) any later version.
yading@10:  *
yading@10:  * FFmpeg is distributed in the hope that it will be useful,
yading@10:  * but WITHOUT ANY WARRANTY; without even the implied warranty of
yading@10:  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
yading@10:  * Lesser General Public License for more details.
yading@10:  *
yading@10:  * You should have received a copy of the GNU Lesser General Public
yading@10:  * License along with FFmpeg; if not, write to the Free Software
yading@10:  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
yading@10:  */
yading@10: 
yading@10: /**
yading@10:  * @file
yading@10:  * Flash Screen Video decoder
yading@10:  * @author Alex Beregszaszi
yading@10:  * @author Benjamin Larsson
yading@10:  * @author Daniel Verkamp
yading@10:  * @author Konstantin Shishkov
yading@10:  *
yading@10:  * A description of the bitstream format for Flash Screen Video version 1/2
yading@10:  * is part of the SWF File Format Specification (version 10), which can be
yading@10:  * downloaded from http://www.adobe.com/devnet/swf.html.
yading@10:  */
yading@10: 
yading@10: #include <stdio.h>
yading@10: #include <stdlib.h>
yading@10: #include <zlib.h>
yading@10: 
yading@10: #include "libavutil/intreadwrite.h"
yading@10: #include "avcodec.h"
yading@10: #include "bytestream.h"
yading@10: #include "get_bits.h"
yading@10: #include "internal.h"
yading@10: 
yading@10: typedef struct BlockInfo {
yading@10:     uint8_t *pos;
yading@10:     int      size;
yading@10: } BlockInfo;
yading@10: 
yading@10: typedef struct FlashSVContext {
yading@10:     AVCodecContext *avctx;
yading@10:     AVFrame         frame;
yading@10:     int             image_width, image_height;
yading@10:     int             block_width, block_height;
yading@10:     uint8_t        *tmpblock;
yading@10:     int             block_size;
yading@10:     z_stream        zstream;
yading@10:     int             ver;
yading@10:     const uint32_t *pal;
yading@10:     int             is_keyframe;
yading@10:     uint8_t        *keyframedata;
yading@10:     uint8_t        *keyframe;
yading@10:     BlockInfo      *blocks;
yading@10:     uint8_t        *deflate_block;
yading@10:     int             deflate_block_size;
yading@10:     int             color_depth;
yading@10:     int             zlibprime_curr, zlibprime_prev;
yading@10:     int             diff_start, diff_height;
yading@10: } FlashSVContext;
yading@10: 
yading@10: 
yading@10: static int decode_hybrid(const uint8_t *sptr, uint8_t *dptr, int dx, int dy,
yading@10:                          int h, int w, int stride, const uint32_t *pal)
yading@10: {
yading@10:     int x, y;
yading@10:     const uint8_t *orig_src = sptr;
yading@10: 
yading@10:     for (y = dx+h; y > dx; y--) {
yading@10:         uint8_t *dst = dptr + (y * stride) + dy * 3;
yading@10:         for (x = 0; x < w; x++) {
yading@10:             if (*sptr & 0x80) {
yading@10:                 /* 15-bit color */
yading@10:                 unsigned c = AV_RB16(sptr) & ~0x8000;
yading@10:                 unsigned b =  c        & 0x1F;
yading@10:                 unsigned g = (c >>  5) & 0x1F;
yading@10:                 unsigned r =  c >> 10;
yading@10:                 /* 000aaabb -> aaabbaaa  */
yading@10:                 *dst++ = (b << 3) | (b >> 2);
yading@10:                 *dst++ = (g << 3) | (g >> 2);
yading@10:                 *dst++ = (r << 3) | (r >> 2);
yading@10:                 sptr += 2;
yading@10:             } else {
yading@10:                 /* palette index */
yading@10:                 uint32_t c = pal[*sptr++];
yading@10:                 bytestream_put_le24(&dst, c);
yading@10:             }
yading@10:         }
yading@10:     }
yading@10:     return sptr - orig_src;
yading@10: }
yading@10: 
yading@10: static av_cold int flashsv_decode_init(AVCodecContext *avctx)
yading@10: {
yading@10:     FlashSVContext *s = avctx->priv_data;
yading@10:     int zret; // Zlib return code
yading@10: 
yading@10:     s->avctx          = avctx;
yading@10:     s->zstream.zalloc = Z_NULL;
yading@10:     s->zstream.zfree  = Z_NULL;
yading@10:     s->zstream.opaque = Z_NULL;
yading@10:     zret = inflateInit(&s->zstream);
yading@10:     if (zret != Z_OK) {
yading@10:         av_log(avctx, AV_LOG_ERROR, "Inflate init error: %d\n", zret);
yading@10:         return 1;
yading@10:     }
yading@10:     avctx->pix_fmt = AV_PIX_FMT_BGR24;
yading@10:     avcodec_get_frame_defaults(&s->frame);
yading@10: 
yading@10:     return 0;
yading@10: }
yading@10: 
yading@10: 
yading@10: static int flashsv2_prime(FlashSVContext *s, uint8_t *src, int size)
yading@10: {
yading@10:     z_stream zs;
yading@10:     int zret; // Zlib return code
yading@10: 
yading@10:     if (!src)
yading@10:         return AVERROR_INVALIDDATA;
yading@10: 
yading@10:     zs.zalloc = NULL;
yading@10:     zs.zfree  = NULL;
yading@10:     zs.opaque = NULL;
yading@10: 
yading@10:     s->zstream.next_in   = src;
yading@10:     s->zstream.avail_in  = size;
yading@10:     s->zstream.next_out  = s->tmpblock;
yading@10:     s->zstream.avail_out = s->block_size * 3;
yading@10:     inflate(&s->zstream, Z_SYNC_FLUSH);
yading@10: 
yading@10:     if (deflateInit(&zs, 0) != Z_OK)
yading@10:         return -1;
yading@10:     zs.next_in   = s->tmpblock;
yading@10:     zs.avail_in  = s->block_size * 3 - s->zstream.avail_out;
yading@10:     zs.next_out  = s->deflate_block;
yading@10:     zs.avail_out = s->deflate_block_size;
yading@10:     deflate(&zs, Z_SYNC_FLUSH);
yading@10:     deflateEnd(&zs);
yading@10: 
yading@10:     if ((zret = inflateReset(&s->zstream)) != Z_OK) {
yading@10:         av_log(s->avctx, AV_LOG_ERROR, "Inflate reset error: %d\n", zret);
yading@10:         return AVERROR_UNKNOWN;
yading@10:     }
yading@10: 
yading@10:     s->zstream.next_in   = s->deflate_block;
yading@10:     s->zstream.avail_in  = s->deflate_block_size - zs.avail_out;
yading@10:     s->zstream.next_out  = s->tmpblock;
yading@10:     s->zstream.avail_out = s->block_size * 3;
yading@10:     inflate(&s->zstream, Z_SYNC_FLUSH);
yading@10: 
yading@10:     return 0;
yading@10: }
yading@10: 
yading@10: static int flashsv_decode_block(AVCodecContext *avctx, AVPacket *avpkt,
yading@10:                                 GetBitContext *gb, int block_size,
yading@10:                                 int width, int height, int x_pos, int y_pos,
yading@10:                                 int blk_idx)
yading@10: {
yading@10:     struct FlashSVContext *s = avctx->priv_data;
yading@10:     uint8_t *line = s->tmpblock;
yading@10:     int k;
yading@10:     int ret = inflateReset(&s->zstream);
yading@10:     if (ret != Z_OK) {
yading@10:         av_log(avctx, AV_LOG_ERROR, "Inflate reset error: %d\n", ret);
yading@10:         return AVERROR_UNKNOWN;
yading@10:     }
yading@10:     if (s->zlibprime_curr || s->zlibprime_prev) {
yading@10:         ret = flashsv2_prime(s,
yading@10:                              s->blocks[blk_idx].pos,
yading@10:                              s->blocks[blk_idx].size);
yading@10:         if (ret < 0)
yading@10:             return ret;
yading@10:     }
yading@10:     s->zstream.next_in   = avpkt->data + get_bits_count(gb) / 8;
yading@10:     s->zstream.avail_in  = block_size;
yading@10:     s->zstream.next_out  = s->tmpblock;
yading@10:     s->zstream.avail_out = s->block_size * 3;
yading@10:     ret = inflate(&s->zstream, Z_FINISH);
yading@10:     if (ret == Z_DATA_ERROR) {
yading@10:         av_log(avctx, AV_LOG_ERROR, "Zlib resync occurred\n");
yading@10:         inflateSync(&s->zstream);
yading@10:         ret = inflate(&s->zstream, Z_FINISH);
yading@10:     }
yading@10: 
yading@10:     if (ret != Z_OK && ret != Z_STREAM_END) {
yading@10:         //return -1;
yading@10:     }
yading@10: 
yading@10:     if (s->is_keyframe) {
yading@10:         s->blocks[blk_idx].pos      = s->keyframedata + (get_bits_count(gb) / 8);
yading@10:         s->blocks[blk_idx].size     = block_size;
yading@10:     }
yading@10:     if (!s->color_depth) {
yading@10:         /* Flash Screen Video stores the image upside down, so copy
yading@10:          * lines to destination in reverse order. */
yading@10:         for (k = 1; k <= s->diff_height; k++) {
yading@10:             memcpy(s->frame.data[0] + x_pos * 3 +
yading@10:                    (s->image_height - y_pos - s->diff_start - k) * s->frame.linesize[0],
yading@10:                    line, width * 3);
yading@10:             /* advance source pointer to next line */
yading@10:             line += width * 3;
yading@10:         }
yading@10:     } else {
yading@10:         /* hybrid 15-bit/palette mode */
yading@10:         decode_hybrid(s->tmpblock, s->frame.data[0],
yading@10:                       s->image_height - (y_pos + 1 + s->diff_start + s->diff_height),
yading@10:                       x_pos, s->diff_height, width,
yading@10:                       s->frame.linesize[0], s->pal);
yading@10:     }
yading@10:     skip_bits_long(gb, 8 * block_size); /* skip the consumed bits */
yading@10:     return 0;
yading@10: }
yading@10: 
yading@10: static int calc_deflate_block_size(int tmpblock_size)
yading@10: {
yading@10:     z_stream zstream;
yading@10:     int size;
yading@10: 
yading@10:     zstream.zalloc = Z_NULL;
yading@10:     zstream.zfree  = Z_NULL;
yading@10:     zstream.opaque = Z_NULL;
yading@10:     if (deflateInit(&zstream, 0) != Z_OK)
yading@10:         return -1;
yading@10:     size = deflateBound(&zstream, tmpblock_size);
yading@10:     deflateEnd(&zstream);
yading@10: 
yading@10:     return size;
yading@10: }
yading@10: 
yading@10: static int flashsv_decode_frame(AVCodecContext *avctx, void *data,
yading@10:                                 int *got_frame, AVPacket *avpkt)
yading@10: {
yading@10:     int buf_size       = avpkt->size;
yading@10:     FlashSVContext *s  = avctx->priv_data;
yading@10:     int h_blocks, v_blocks, h_part, v_part, i, j, ret;
yading@10:     GetBitContext gb;
yading@10:     int last_blockwidth = s->block_width;
yading@10:     int last_blockheight= s->block_height;
yading@10: 
yading@10:     /* no supplementary picture */
yading@10:     if (buf_size == 0)
yading@10:         return 0;
yading@10:     if (buf_size < 4)
yading@10:         return -1;
yading@10: 
yading@10:     init_get_bits(&gb, avpkt->data, buf_size * 8);
yading@10: 
yading@10:     /* start to parse the bitstream */
yading@10:     s->block_width  = 16 * (get_bits(&gb,  4) + 1);
yading@10:     s->image_width  =       get_bits(&gb, 12);
yading@10:     s->block_height = 16 * (get_bits(&gb,  4) + 1);
yading@10:     s->image_height =       get_bits(&gb, 12);
yading@10: 
yading@10:     if (   last_blockwidth != s->block_width
yading@10:         || last_blockheight!= s->block_height)
yading@10:         av_freep(&s->blocks);
yading@10: 
yading@10:     if (s->ver == 2) {
yading@10:         skip_bits(&gb, 6);
yading@10:         if (get_bits1(&gb)) {
yading@10:             avpriv_request_sample(avctx, "iframe");
yading@10:             return AVERROR_PATCHWELCOME;
yading@10:         }
yading@10:         if (get_bits1(&gb)) {
yading@10:             avpriv_request_sample(avctx, "Custom palette");
yading@10:             return AVERROR_PATCHWELCOME;
yading@10:         }
yading@10:     }
yading@10: 
yading@10:     /* calculate number of blocks and size of border (partial) blocks */
yading@10:     h_blocks = s->image_width  / s->block_width;
yading@10:     h_part   = s->image_width  % s->block_width;
yading@10:     v_blocks = s->image_height / s->block_height;
yading@10:     v_part   = s->image_height % s->block_height;
yading@10: 
yading@10:     /* the block size could change between frames, make sure the buffer
yading@10:      * is large enough, if not, get a larger one */
yading@10:     if (s->block_size < s->block_width * s->block_height) {
yading@10:         int tmpblock_size = 3 * s->block_width * s->block_height;
yading@10: 
yading@10:         s->tmpblock = av_realloc(s->tmpblock, tmpblock_size);
yading@10:         if (!s->tmpblock) {
yading@10:             av_log(avctx, AV_LOG_ERROR, "Can't allocate decompression buffer.\n");
yading@10:             return AVERROR(ENOMEM);
yading@10:         }
yading@10:         if (s->ver == 2) {
yading@10:             s->deflate_block_size = calc_deflate_block_size(tmpblock_size);
yading@10:             if (s->deflate_block_size <= 0) {
yading@10:                 av_log(avctx, AV_LOG_ERROR, "Can't determine deflate buffer size.\n");
yading@10:                 return -1;
yading@10:             }
yading@10:             s->deflate_block = av_realloc(s->deflate_block, s->deflate_block_size);
yading@10:             if (!s->deflate_block) {
yading@10:                 av_log(avctx, AV_LOG_ERROR, "Can't allocate deflate buffer.\n");
yading@10:                 return AVERROR(ENOMEM);
yading@10:             }
yading@10:         }
yading@10:     }
yading@10:     s->block_size = s->block_width * s->block_height;
yading@10: 
yading@10:     /* initialize the image size once */
yading@10:     if (avctx->width == 0 && avctx->height == 0) {
yading@10:         avcodec_set_dimensions(avctx, s->image_width, s->image_height);
yading@10:     }
yading@10: 
yading@10:     /* check for changes of image width and image height */
yading@10:     if (avctx->width != s->image_width || avctx->height != s->image_height) {
yading@10:         av_log(avctx, AV_LOG_ERROR,
yading@10:                "Frame width or height differs from first frame!\n");
yading@10:         av_log(avctx, AV_LOG_ERROR, "fh = %d, fv %d  vs  ch = %d, cv = %d\n",
yading@10:                avctx->height, avctx->width, s->image_height, s->image_width);
yading@10:         return AVERROR_INVALIDDATA;
yading@10:     }
yading@10: 
yading@10:     /* we care for keyframes only in Screen Video v2 */
yading@10:     s->is_keyframe = (avpkt->flags & AV_PKT_FLAG_KEY) && (s->ver == 2);
yading@10:     if (s->is_keyframe) {
yading@10:         s->keyframedata = av_realloc(s->keyframedata, avpkt->size);
yading@10:         memcpy(s->keyframedata, avpkt->data, avpkt->size);
yading@10:     }
yading@10:     if(s->ver == 2 && !s->blocks)
yading@10:         s->blocks = av_mallocz((v_blocks + !!v_part) * (h_blocks + !!h_part)
yading@10:                                 * sizeof(s->blocks[0]));
yading@10: 
yading@10:     av_dlog(avctx, "image: %dx%d block: %dx%d num: %dx%d part: %dx%d\n",
yading@10:             s->image_width, s->image_height, s->block_width, s->block_height,
yading@10:             h_blocks, v_blocks, h_part, v_part);
yading@10: 
yading@10:     if ((ret = ff_reget_buffer(avctx, &s->frame)) < 0)
yading@10:         return ret;
yading@10: 
yading@10:     /* loop over all block columns */
yading@10:     for (j = 0; j < v_blocks + (v_part ? 1 : 0); j++) {
yading@10: 
yading@10:         int y_pos  = j * s->block_height; // vertical position in frame
yading@10:         int cur_blk_height = (j < v_blocks) ? s->block_height : v_part;
yading@10: 
yading@10:         /* loop over all block rows */
yading@10:         for (i = 0; i < h_blocks + (h_part ? 1 : 0); i++) {
yading@10:             int x_pos = i * s->block_width; // horizontal position in frame
yading@10:             int cur_blk_width = (i < h_blocks) ? s->block_width : h_part;
yading@10:             int has_diff = 0;
yading@10: 
yading@10:             /* get the size of the compressed zlib chunk */
yading@10:             int size = get_bits(&gb, 16);
yading@10: 
yading@10:             s->color_depth    = 0;
yading@10:             s->zlibprime_curr = 0;
yading@10:             s->zlibprime_prev = 0;
yading@10:             s->diff_start     = 0;
yading@10:             s->diff_height    = cur_blk_height;
yading@10: 
yading@10:             if (8 * size > get_bits_left(&gb)) {
yading@10:                 av_frame_unref(&s->frame);
yading@10:                 return AVERROR_INVALIDDATA;
yading@10:             }
yading@10: 
yading@10:             if (s->ver == 2 && size) {
yading@10:                 skip_bits(&gb, 3);
yading@10:                 s->color_depth    = get_bits(&gb, 2);
yading@10:                 has_diff          = get_bits1(&gb);
yading@10:                 s->zlibprime_curr = get_bits1(&gb);
yading@10:                 s->zlibprime_prev = get_bits1(&gb);
yading@10: 
yading@10:                 if (s->color_depth != 0 && s->color_depth != 2) {
yading@10:                     av_log(avctx, AV_LOG_ERROR,
yading@10:                            "%dx%d invalid color depth %d\n", i, j, s->color_depth);
yading@10:                     return AVERROR_INVALIDDATA;
yading@10:                 }
yading@10: 
yading@10:                 if (has_diff) {
yading@10:                     if (!s->keyframe) {
yading@10:                         av_log(avctx, AV_LOG_ERROR,
yading@10:                                "inter frame without keyframe\n");
yading@10:                         return AVERROR_INVALIDDATA;
yading@10:                     }
yading@10:                     s->diff_start  = get_bits(&gb, 8);
yading@10:                     s->diff_height = get_bits(&gb, 8);
yading@10:                     av_log(avctx, AV_LOG_DEBUG,
yading@10:                            "%dx%d diff start %d height %d\n",
yading@10:                            i, j, s->diff_start, s->diff_height);
yading@10:                     size -= 2;
yading@10:                 }
yading@10: 
yading@10:                 if (s->zlibprime_prev)
yading@10:                     av_log(avctx, AV_LOG_DEBUG, "%dx%d zlibprime_prev\n", i, j);
yading@10: 
yading@10:                 if (s->zlibprime_curr) {
yading@10:                     int col = get_bits(&gb, 8);
yading@10:                     int row = get_bits(&gb, 8);
yading@10:                     av_log(avctx, AV_LOG_DEBUG, "%dx%d zlibprime_curr %dx%d\n", i, j, col, row);
yading@10:                     size -= 2;
yading@10:                     avpriv_request_sample(avctx, "zlibprime_curr");
yading@10:                     return AVERROR_PATCHWELCOME;
yading@10:                 }
yading@10:                 if (!s->blocks && (s->zlibprime_curr || s->zlibprime_prev)) {
yading@10:                     av_log(avctx, AV_LOG_ERROR, "no data available for zlib "
yading@10:                            "priming\n");
yading@10:                     return AVERROR_INVALIDDATA;
yading@10:                 }
yading@10:                 size--; // account for flags byte
yading@10:             }
yading@10: 
yading@10:             if (has_diff) {
yading@10:                 int k;
yading@10:                 int off = (s->image_height - y_pos - 1) * s->frame.linesize[0];
yading@10: 
yading@10:                 for (k = 0; k < cur_blk_height; k++)
yading@10:                     memcpy(s->frame.data[0] + off - k*s->frame.linesize[0] + x_pos*3,
yading@10:                            s->keyframe + off - k*s->frame.linesize[0] + x_pos*3,
yading@10:                            cur_blk_width * 3);
yading@10:             }
yading@10: 
yading@10:             /* skip unchanged blocks, which have size 0 */
yading@10:             if (size) {
yading@10:                 if (flashsv_decode_block(avctx, avpkt, &gb, size,
yading@10:                                          cur_blk_width, cur_blk_height,
yading@10:                                          x_pos, y_pos,
yading@10:                                          i + j * (h_blocks + !!h_part)))
yading@10:                     av_log(avctx, AV_LOG_ERROR,
yading@10:                            "error in decompression of block %dx%d\n", i, j);
yading@10:             }
yading@10:         }
yading@10:     }
yading@10:     if (s->is_keyframe && s->ver == 2) {
yading@10:         if (!s->keyframe) {
yading@10:             s->keyframe = av_malloc(s->frame.linesize[0] * avctx->height);
yading@10:             if (!s->keyframe) {
yading@10:                 av_log(avctx, AV_LOG_ERROR, "Cannot allocate image data\n");
yading@10:                 return AVERROR(ENOMEM);
yading@10:             }
yading@10:         }
yading@10:         memcpy(s->keyframe, s->frame.data[0], s->frame.linesize[0] * avctx->height);
yading@10:     }
yading@10: 
yading@10:     if ((ret = av_frame_ref(data, &s->frame)) < 0)
yading@10:         return ret;
yading@10: 
yading@10:     *got_frame = 1;
yading@10: 
yading@10:     if ((get_bits_count(&gb) / 8) != buf_size)
yading@10:         av_log(avctx, AV_LOG_ERROR, "buffer not fully consumed (%d != %d)\n",
yading@10:                buf_size, (get_bits_count(&gb) / 8));
yading@10: 
yading@10:     /* report that the buffer was completely consumed */
yading@10:     return buf_size;
yading@10: }
yading@10: 
yading@10: 
yading@10: static av_cold int flashsv_decode_end(AVCodecContext *avctx)
yading@10: {
yading@10:     FlashSVContext *s = avctx->priv_data;
yading@10:     inflateEnd(&s->zstream);
yading@10:     /* release the frame if needed */
yading@10:     av_frame_unref(&s->frame);
yading@10: 
yading@10:     /* free the tmpblock */
yading@10:     av_free(s->tmpblock);
yading@10: 
yading@10:     return 0;
yading@10: }
yading@10: 
yading@10: 
yading@10: #if CONFIG_FLASHSV_DECODER
yading@10: AVCodec ff_flashsv_decoder = {
yading@10:     .name           = "flashsv",
yading@10:     .type           = AVMEDIA_TYPE_VIDEO,
yading@10:     .id             = AV_CODEC_ID_FLASHSV,
yading@10:     .priv_data_size = sizeof(FlashSVContext),
yading@10:     .init           = flashsv_decode_init,
yading@10:     .close          = flashsv_decode_end,
yading@10:     .decode         = flashsv_decode_frame,
yading@10:     .capabilities   = CODEC_CAP_DR1,
yading@10:     .pix_fmts       = (const enum AVPixelFormat[]){ AV_PIX_FMT_BGR24, AV_PIX_FMT_NONE },
yading@10:     .long_name      = NULL_IF_CONFIG_SMALL("Flash Screen Video v1"),
yading@10: };
yading@10: #endif /* CONFIG_FLASHSV_DECODER */
yading@10: 
yading@10: #if CONFIG_FLASHSV2_DECODER
yading@10: static const uint32_t ff_flashsv2_default_palette[128] = {
yading@10:     0x000000, 0x333333, 0x666666, 0x999999, 0xCCCCCC, 0xFFFFFF,
yading@10:     0x330000, 0x660000, 0x990000, 0xCC0000, 0xFF0000, 0x003300,
yading@10:     0x006600, 0x009900, 0x00CC00, 0x00FF00, 0x000033, 0x000066,
yading@10:     0x000099, 0x0000CC, 0x0000FF, 0x333300, 0x666600, 0x999900,
yading@10:     0xCCCC00, 0xFFFF00, 0x003333, 0x006666, 0x009999, 0x00CCCC,
yading@10:     0x00FFFF, 0x330033, 0x660066, 0x990099, 0xCC00CC, 0xFF00FF,
yading@10:     0xFFFF33, 0xFFFF66, 0xFFFF99, 0xFFFFCC, 0xFF33FF, 0xFF66FF,
yading@10:     0xFF99FF, 0xFFCCFF, 0x33FFFF, 0x66FFFF, 0x99FFFF, 0xCCFFFF,
yading@10:     0xCCCC33, 0xCCCC66, 0xCCCC99, 0xCCCCFF, 0xCC33CC, 0xCC66CC,
yading@10:     0xCC99CC, 0xCCFFCC, 0x33CCCC, 0x66CCCC, 0x99CCCC, 0xFFCCCC,
yading@10:     0x999933, 0x999966, 0x9999CC, 0x9999FF, 0x993399, 0x996699,
yading@10:     0x99CC99, 0x99FF99, 0x339999, 0x669999, 0xCC9999, 0xFF9999,
yading@10:     0x666633, 0x666699, 0x6666CC, 0x6666FF, 0x663366, 0x669966,
yading@10:     0x66CC66, 0x66FF66, 0x336666, 0x996666, 0xCC6666, 0xFF6666,
yading@10:     0x333366, 0x333399, 0x3333CC, 0x3333FF, 0x336633, 0x339933,
yading@10:     0x33CC33, 0x33FF33, 0x663333, 0x993333, 0xCC3333, 0xFF3333,
yading@10:     0x003366, 0x336600, 0x660033, 0x006633, 0x330066, 0x663300,
yading@10:     0x336699, 0x669933, 0x993366, 0x339966, 0x663399, 0x996633,
yading@10:     0x6699CC, 0x99CC66, 0xCC6699, 0x66CC99, 0x9966CC, 0xCC9966,
yading@10:     0x99CCFF, 0xCCFF99, 0xFF99CC, 0x99FFCC, 0xCC99FF, 0xFFCC99,
yading@10:     0x111111, 0x222222, 0x444444, 0x555555, 0xAAAAAA, 0xBBBBBB,
yading@10:     0xDDDDDD, 0xEEEEEE
yading@10: };
yading@10: 
yading@10: static av_cold int flashsv2_decode_init(AVCodecContext *avctx)
yading@10: {
yading@10:     FlashSVContext *s = avctx->priv_data;
yading@10:     flashsv_decode_init(avctx);
yading@10:     s->pal = ff_flashsv2_default_palette;
yading@10:     s->ver = 2;
yading@10: 
yading@10:     return 0;
yading@10: }
yading@10: 
yading@10: static av_cold int flashsv2_decode_end(AVCodecContext *avctx)
yading@10: {
yading@10:     FlashSVContext *s = avctx->priv_data;
yading@10: 
yading@10:     av_freep(&s->keyframedata);
yading@10:     av_freep(&s->blocks);
yading@10:     av_freep(&s->keyframe);
yading@10:     av_freep(&s->deflate_block);
yading@10:     flashsv_decode_end(avctx);
yading@10: 
yading@10:     return 0;
yading@10: }
yading@10: 
yading@10: AVCodec ff_flashsv2_decoder = {
yading@10:     .name           = "flashsv2",
yading@10:     .type           = AVMEDIA_TYPE_VIDEO,
yading@10:     .id             = AV_CODEC_ID_FLASHSV2,
yading@10:     .priv_data_size = sizeof(FlashSVContext),
yading@10:     .init           = flashsv2_decode_init,
yading@10:     .close          = flashsv2_decode_end,
yading@10:     .decode         = flashsv_decode_frame,
yading@10:     .capabilities   = CODEC_CAP_DR1,
yading@10:     .pix_fmts       = (const enum AVPixelFormat[]){ AV_PIX_FMT_BGR24, AV_PIX_FMT_NONE },
yading@10:     .long_name      = NULL_IF_CONFIG_SMALL("Flash Screen Video v2"),
yading@10: };
yading@10: #endif /* CONFIG_FLASHSV2_DECODER */