diff options
Diffstat (limited to 'ffmpeg/libavcodec/anm.c')
| -rw-r--r-- | ffmpeg/libavcodec/anm.c | 200 |
1 files changed, 0 insertions, 200 deletions
diff --git a/ffmpeg/libavcodec/anm.c b/ffmpeg/libavcodec/anm.c deleted file mode 100644 index 79a87dd..0000000 --- a/ffmpeg/libavcodec/anm.c +++ /dev/null @@ -1,200 +0,0 @@ -/* - * Deluxe Paint Animation decoder - * Copyright (c) 2009 Peter Ross - * - * This file is part of FFmpeg. - * - * FFmpeg is free software; you can redistribute it and/or - * modify it under the terms of the GNU Lesser General Public - * License as published by the Free Software Foundation; either - * version 2.1 of the License, or (at your option) any later version. - * - * FFmpeg is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU - * Lesser General Public License for more details. - * - * You should have received a copy of the GNU Lesser General Public - * License along with FFmpeg; if not, write to the Free Software - * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA - */ - -/** - * @file - * Deluxe Paint Animation decoder - */ - -#include "avcodec.h" -#include "bytestream.h" -#include "internal.h" - -typedef struct AnmContext { - AVFrame *frame; - int palette[AVPALETTE_COUNT]; - GetByteContext gb; - int x; ///< x coordinate position -} AnmContext; - -static av_cold int decode_init(AVCodecContext *avctx) -{ - AnmContext *s = avctx->priv_data; - int i; - - avctx->pix_fmt = AV_PIX_FMT_PAL8; - - s->frame = av_frame_alloc(); - if (!s->frame) - return AVERROR(ENOMEM); - - bytestream2_init(&s->gb, avctx->extradata, avctx->extradata_size); - if (bytestream2_get_bytes_left(&s->gb) < 16 * 8 + 4 * 256) - return AVERROR_INVALIDDATA; - - bytestream2_skipu(&s->gb, 16 * 8); - for (i = 0; i < 256; i++) - s->palette[i] = bytestream2_get_le32u(&s->gb); - - return 0; -} - -/** - * Perform decode operation - * @param dst pointer to destination image buffer - * @param dst_end pointer to end of destination image buffer - * @param gb GetByteContext (optional, see below) - * @param pixel Fill color (optional, see below) - * @param count Pixel count - * @param x Pointer to x-axis counter - * @param width Image width - * @param linesize Destination image buffer linesize - * @return non-zero if destination buffer is exhausted - * - * a copy operation is achieved when 'gb' is set - * a fill operation is achieved when 'gb' is null and pixel is >= 0 - * a skip operation is achieved when 'gb' is null and pixel is < 0 - */ -static inline int op(uint8_t **dst, const uint8_t *dst_end, - GetByteContext *gb, - int pixel, int count, - int *x, int width, int linesize) -{ - int remaining = width - *x; - while(count > 0) { - int striplen = FFMIN(count, remaining); - if (gb) { - if (bytestream2_get_bytes_left(gb) < striplen) - goto exhausted; - bytestream2_get_bufferu(gb, *dst, striplen); - } else if (pixel >= 0) - memset(*dst, pixel, striplen); - *dst += striplen; - remaining -= striplen; - count -= striplen; - if (remaining <= 0) { - *dst += linesize - width; - remaining = width; - } - if (linesize > 0) { - if (*dst >= dst_end) goto exhausted; - } else { - if (*dst <= dst_end) goto exhausted; - } - } - *x = width - remaining; - return 0; - -exhausted: - *x = width - remaining; - return 1; -} - -static int decode_frame(AVCodecContext *avctx, - void *data, int *got_frame, - AVPacket *avpkt) -{ - AnmContext *s = avctx->priv_data; - const int buf_size = avpkt->size; - uint8_t *dst, *dst_end; - int count, ret; - - if ((ret = ff_reget_buffer(avctx, s->frame)) < 0) - return ret; - dst = s->frame->data[0]; - dst_end = s->frame->data[0] + s->frame->linesize[0]*avctx->height; - - bytestream2_init(&s->gb, avpkt->data, buf_size); - - if (bytestream2_get_byte(&s->gb) != 0x42) { - avpriv_request_sample(avctx, "Unknown record type"); - return AVERROR_INVALIDDATA; - } - if (bytestream2_get_byte(&s->gb)) { - avpriv_request_sample(avctx, "Padding bytes"); - return AVERROR_PATCHWELCOME; - } - bytestream2_skip(&s->gb, 2); - - s->x = 0; - do { - /* if statements are ordered by probability */ -#define OP(gb, pixel, count) \ - op(&dst, dst_end, (gb), (pixel), (count), &s->x, avctx->width, s->frame->linesize[0]) - - int type = bytestream2_get_byte(&s->gb); - count = type & 0x7F; - type >>= 7; - if (count) { - if (OP(type ? NULL : &s->gb, -1, count)) break; - } else if (!type) { - int pixel; - count = bytestream2_get_byte(&s->gb); /* count==0 gives nop */ - pixel = bytestream2_get_byte(&s->gb); - if (OP(NULL, pixel, count)) break; - } else { - int pixel; - type = bytestream2_get_le16(&s->gb); - count = type & 0x3FFF; - type >>= 14; - if (!count) { - if (type == 0) - break; // stop - if (type == 2) { - avpriv_request_sample(avctx, "Unknown opcode"); - return AVERROR_PATCHWELCOME; - } - continue; - } - pixel = type == 3 ? bytestream2_get_byte(&s->gb) : -1; - if (type == 1) count += 0x4000; - if (OP(type == 2 ? &s->gb : NULL, pixel, count)) break; - } - } while (bytestream2_get_bytes_left(&s->gb) > 0); - - memcpy(s->frame->data[1], s->palette, AVPALETTE_SIZE); - - *got_frame = 1; - if ((ret = av_frame_ref(data, s->frame)) < 0) - return ret; - - return buf_size; -} - -static av_cold int decode_end(AVCodecContext *avctx) -{ - AnmContext *s = avctx->priv_data; - - av_frame_free(&s->frame); - return 0; -} - -AVCodec ff_anm_decoder = { - .name = "anm", - .long_name = NULL_IF_CONFIG_SMALL("Deluxe Paint Animation"), - .type = AVMEDIA_TYPE_VIDEO, - .id = AV_CODEC_ID_ANM, - .priv_data_size = sizeof(AnmContext), - .init = decode_init, - .close = decode_end, - .decode = decode_frame, - .capabilities = CODEC_CAP_DR1, -}; |