diff options
Diffstat (limited to 'contrib/ffmpeg/libavcodec/tiertexseqv.c')
| -rw-r--r-- | contrib/ffmpeg/libavcodec/tiertexseqv.c | 232 |
1 files changed, 0 insertions, 232 deletions
diff --git a/contrib/ffmpeg/libavcodec/tiertexseqv.c b/contrib/ffmpeg/libavcodec/tiertexseqv.c deleted file mode 100644 index ca3baf09e..000000000 --- a/contrib/ffmpeg/libavcodec/tiertexseqv.c +++ /dev/null @@ -1,232 +0,0 @@ -/* - * Tiertex Limited SEQ Video Decoder - * Copyright (c) 2006 Gregory Montoir (cyx@users.sourceforge.net) - * - * 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 tiertexseqv.c - * Tiertex Limited SEQ video decoder - */ - -#include "avcodec.h" -#include "common.h" -#define ALT_BITSTREAM_READER_LE -#include "bitstream.h" - - -typedef struct SeqVideoContext { - AVCodecContext *avctx; - AVFrame frame; - unsigned int palette[256]; - unsigned char block[8 * 8]; -} SeqVideoContext; - - -static unsigned char *seq_unpack_rle_block(unsigned char *src, unsigned char *dst, int dst_size) -{ - int i, len, sz; - GetBitContext gb; - int code_table[64]; - - /* get the rle codes (at most 64 bytes) */ - init_get_bits(&gb, src, 64 * 8); - for (i = 0, sz = 0; i < 64 && sz < dst_size; i++) { - code_table[i] = get_sbits(&gb, 4); - sz += FFABS(code_table[i]); - } - src += (get_bits_count(&gb) + 7) / 8; - - /* do the rle unpacking */ - for (i = 0; i < 64 && dst_size > 0; i++) { - len = code_table[i]; - if (len < 0) { - len = -len; - memset(dst, *src++, FFMIN(len, dst_size)); - } else { - memcpy(dst, src, FFMIN(len, dst_size)); - src += len; - } - dst += len; - dst_size -= len; - } - return src; -} - -static unsigned char *seq_decode_op1(SeqVideoContext *seq, unsigned char *src, unsigned char *dst) -{ - unsigned char *color_table; - int b, i, len, bits; - GetBitContext gb; - - len = *src++; - if (len & 0x80) { - switch (len & 3) { - case 1: - src = seq_unpack_rle_block(src, seq->block, sizeof(seq->block)); - for (b = 0; b < 8; b++) { - memcpy(dst, &seq->block[b * 8], 8); - dst += seq->frame.linesize[0]; - } - break; - case 2: - src = seq_unpack_rle_block(src, seq->block, sizeof(seq->block)); - for (i = 0; i < 8; i++) { - for (b = 0; b < 8; b++) - dst[b * seq->frame.linesize[0]] = seq->block[i * 8 + b]; - ++dst; - } - break; - } - } else { - color_table = src; - src += len; - bits = ff_log2_tab[len - 1] + 1; - init_get_bits(&gb, src, bits * 8 * 8); src += bits * 8; - for (b = 0; b < 8; b++) { - for (i = 0; i < 8; i++) - dst[i] = color_table[get_bits(&gb, bits)]; - dst += seq->frame.linesize[0]; - } - } - - return src; -} - -static unsigned char *seq_decode_op2(SeqVideoContext *seq, unsigned char *src, unsigned char *dst) -{ - int i; - - for (i = 0; i < 8; i++) { - memcpy(dst, src, 8); - src += 8; - dst += seq->frame.linesize[0]; - } - - return src; -} - -static unsigned char *seq_decode_op3(SeqVideoContext *seq, unsigned char *src, unsigned char *dst) -{ - int pos, offset; - - do { - pos = *src++; - offset = ((pos >> 3) & 7) * seq->frame.linesize[0] + (pos & 7); - dst[offset] = *src++; - } while (!(pos & 0x80)); - - return src; -} - -static void seqvideo_decode(SeqVideoContext *seq, unsigned char *data, int data_size) -{ - GetBitContext gb; - int flags, i, j, x, y, op; - unsigned char c[3]; - unsigned char *dst; - - flags = *data++; - - if (flags & 1) { - for (i = 0; i < 256; i++) { - for (j = 0; j < 3; j++, data++) - c[j] = (*data << 2) | (*data >> 4); - seq->palette[i] = (c[0] << 16) | (c[1] << 8) | c[2]; - } - memcpy(seq->frame.data[1], seq->palette, sizeof(seq->palette)); - seq->frame.palette_has_changed = 1; - } - - if (flags & 2) { - init_get_bits(&gb, data, 128 * 8); data += 128; - for (y = 0; y < 128; y += 8) - for (x = 0; x < 256; x += 8) { - dst = &seq->frame.data[0][y * seq->frame.linesize[0] + x]; - op = get_bits(&gb, 2); - switch (op) { - case 1: - data = seq_decode_op1(seq, data, dst); - break; - case 2: - data = seq_decode_op2(seq, data, dst); - break; - case 3: - data = seq_decode_op3(seq, data, dst); - break; - } - } - } -} - -static int seqvideo_decode_init(AVCodecContext *avctx) -{ - SeqVideoContext *seq = (SeqVideoContext *)avctx->priv_data; - - seq->avctx = avctx; - avctx->pix_fmt = PIX_FMT_PAL8; - avctx->has_b_frames = 0; - - seq->frame.data[0] = NULL; - - return 0; -} - -static int seqvideo_decode_frame(AVCodecContext *avctx, - void *data, int *data_size, - uint8_t *buf, int buf_size) -{ - - SeqVideoContext *seq = (SeqVideoContext *)avctx->priv_data; - - seq->frame.reference = 1; - seq->frame.buffer_hints = FF_BUFFER_HINTS_VALID | FF_BUFFER_HINTS_PRESERVE | FF_BUFFER_HINTS_REUSABLE; - if (avctx->reget_buffer(avctx, &seq->frame)) { - av_log(seq->avctx, AV_LOG_ERROR, "tiertexseqvideo: reget_buffer() failed\n"); - return -1; - } - - seqvideo_decode(seq, buf, buf_size); - - *data_size = sizeof(AVFrame); - *(AVFrame *)data = seq->frame; - - return buf_size; -} - -static int seqvideo_decode_end(AVCodecContext *avctx) -{ - SeqVideoContext *seq = (SeqVideoContext *)avctx->priv_data; - - if (seq->frame.data[0]) - avctx->release_buffer(avctx, &seq->frame); - - return 0; -} - -AVCodec tiertexseqvideo_decoder = { - "tiertexseqvideo", - CODEC_TYPE_VIDEO, - CODEC_ID_TIERTEXSEQVIDEO, - sizeof(SeqVideoContext), - seqvideo_decode_init, - NULL, - seqvideo_decode_end, - seqvideo_decode_frame, - CODEC_CAP_DR1, -}; |