diff options
| author | Tim Redfern <tim@eclectronics.org> | 2013-09-05 17:55:35 +0100 |
|---|---|---|
| committer | Tim Redfern <tim@eclectronics.org> | 2013-09-05 17:55:35 +0100 |
| commit | 741fb4b9e135cfb161a749db88713229038577bb (patch) | |
| tree | 08bc9925659cbcac45162bacf31dc6336d4f60b4 /ffmpeg1/libavcodec/bfi.c | |
| parent | a2e1bf3495b7bfefdaedb8fc737e969ab06df079 (diff) | |
making act segmenter
Diffstat (limited to 'ffmpeg1/libavcodec/bfi.c')
| -rw-r--r-- | ffmpeg1/libavcodec/bfi.c | 186 |
1 files changed, 0 insertions, 186 deletions
diff --git a/ffmpeg1/libavcodec/bfi.c b/ffmpeg1/libavcodec/bfi.c deleted file mode 100644 index 9cfcd14..0000000 --- a/ffmpeg1/libavcodec/bfi.c +++ /dev/null @@ -1,186 +0,0 @@ -/* - * Brute Force & Ignorance (BFI) video decoder - * Copyright (c) 2008 Sisir Koppaka - * - * 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 - * @brief Brute Force & Ignorance (.bfi) video decoder - * @author Sisir Koppaka ( sisir.koppaka at gmail dot com ) - * @see http://wiki.multimedia.cx/index.php?title=BFI - */ - -#include "libavutil/common.h" -#include "avcodec.h" -#include "bytestream.h" -#include "internal.h" - -typedef struct BFIContext { - AVCodecContext *avctx; - uint8_t *dst; - uint32_t pal[256]; -} BFIContext; - -static av_cold int bfi_decode_init(AVCodecContext *avctx) -{ - BFIContext *bfi = avctx->priv_data; - avctx->pix_fmt = AV_PIX_FMT_PAL8; - bfi->dst = av_mallocz(avctx->width * avctx->height); - return 0; -} - -static int bfi_decode_frame(AVCodecContext *avctx, void *data, - int *got_frame, AVPacket *avpkt) -{ - AVFrame *frame = data; - GetByteContext g; - int buf_size = avpkt->size; - BFIContext *bfi = avctx->priv_data; - uint8_t *dst = bfi->dst; - uint8_t *src, *dst_offset, colour1, colour2; - uint8_t *frame_end = bfi->dst + avctx->width * avctx->height; - uint32_t *pal; - int i, j, ret, height = avctx->height; - - if ((ret = ff_get_buffer(avctx, frame, 0)) < 0) - return ret; - - bytestream2_init(&g, avpkt->data, buf_size); - - /* Set frame parameters and palette, if necessary */ - if (!avctx->frame_number) { - frame->pict_type = AV_PICTURE_TYPE_I; - frame->key_frame = 1; - /* Setting the palette */ - if (avctx->extradata_size > 768) { - av_log(NULL, AV_LOG_ERROR, "Palette is too large.\n"); - return AVERROR_INVALIDDATA; - } - pal = (uint32_t *)frame->data[1]; - for (i = 0; i < avctx->extradata_size / 3; i++) { - int shift = 16; - *pal = 0xFFU << 24; - for (j = 0; j < 3; j++, shift -= 8) - *pal += ((avctx->extradata[i * 3 + j] << 2) | - (avctx->extradata[i * 3 + j] >> 4)) << shift; - pal++; - } - memcpy(bfi->pal, frame->data[1], sizeof(bfi->pal)); - frame->palette_has_changed = 1; - } else { - frame->pict_type = AV_PICTURE_TYPE_P; - frame->key_frame = 0; - frame->palette_has_changed = 0; - memcpy(frame->data[1], bfi->pal, sizeof(bfi->pal)); - } - - bytestream2_skip(&g, 4); // Unpacked size, not required. - - while (dst != frame_end) { - static const uint8_t lentab[4] = { 0, 2, 0, 1 }; - unsigned int byte = bytestream2_get_byte(&g), av_uninit(offset); - unsigned int code = byte >> 6; - unsigned int length = byte & ~0xC0; - - if (!bytestream2_get_bytes_left(&g)) { - av_log(avctx, AV_LOG_ERROR, - "Input resolution larger than actual frame.\n"); - return AVERROR_INVALIDDATA; - } - - /* Get length and offset (if required) */ - if (length == 0) { - if (code == 1) { - length = bytestream2_get_byte(&g); - offset = bytestream2_get_le16(&g); - } else { - length = bytestream2_get_le16(&g); - if (code == 2 && length == 0) - break; - } - } else { - if (code == 1) - offset = bytestream2_get_byte(&g); - } - - /* Do boundary check */ - if (dst + (length << lentab[code]) > frame_end) - break; - - switch (code) { - case 0: // normal chain - if (length >= bytestream2_get_bytes_left(&g)) { - av_log(avctx, AV_LOG_ERROR, "Frame larger than buffer.\n"); - return AVERROR_INVALIDDATA; - } - bytestream2_get_buffer(&g, dst, length); - dst += length; - break; - case 1: // back chain - dst_offset = dst - offset; - length *= 4; // Convert dwords to bytes. - if (dst_offset < bfi->dst) - break; - while (length--) - *dst++ = *dst_offset++; - break; - case 2: // skip chain - dst += length; - break; - case 3: // fill chain - colour1 = bytestream2_get_byte(&g); - colour2 = bytestream2_get_byte(&g); - while (length--) { - *dst++ = colour1; - *dst++ = colour2; - } - break; - } - } - - src = bfi->dst; - dst = frame->data[0]; - while (height--) { - memcpy(dst, src, avctx->width); - src += avctx->width; - dst += frame->linesize[0]; - } - *got_frame = 1; - - return buf_size; -} - -static av_cold int bfi_decode_close(AVCodecContext *avctx) -{ - BFIContext *bfi = avctx->priv_data; - av_free(bfi->dst); - return 0; -} - -AVCodec ff_bfi_decoder = { - .name = "bfi", - .type = AVMEDIA_TYPE_VIDEO, - .id = AV_CODEC_ID_BFI, - .priv_data_size = sizeof(BFIContext), - .init = bfi_decode_init, - .close = bfi_decode_close, - .decode = bfi_decode_frame, - .capabilities = CODEC_CAP_DR1, - .long_name = NULL_IF_CONFIG_SMALL("Brute Force & Ignorance"), -}; |
