mirror of https://github.com/FFmpeg/FFmpeg.git
Originally committed as revision 10833 to svn://svn.ffmpeg.org/ffmpeg/trunkpull/126/head
parent
4e745a3b28
commit
66f7679c62
11 changed files with 534 additions and 4 deletions
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/*
|
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* Beam Software VB decoder |
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* Copyright (c) 2007 Konstantin Shishkov |
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* |
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* This file is part of FFmpeg. |
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* |
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* FFmpeg is free software; you can redistribute it and/or |
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* modify it under the terms of the GNU Lesser General Public |
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* License as published by the Free Software Foundation; either |
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* version 2.1 of the License, or (at your option) any later version. |
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* |
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* FFmpeg is distributed in the hope that it will be useful, |
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* but WITHOUT ANY WARRANTY; without even the implied warranty of |
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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* Lesser General Public License for more details. |
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* |
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* You should have received a copy of the GNU Lesser General Public |
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* License along with FFmpeg; if not, write to the Free Software |
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
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*/ |
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/**
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* @file vb.c |
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* VB Video decoder |
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*/ |
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#include <stdio.h> |
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#include <stdlib.h> |
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#include "avcodec.h" |
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#include "bytestream.h" |
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enum VBFlags{ |
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VB_HAS_GMC = 0x01, |
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VB_HAS_AUDIO = 0x04, |
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VB_HAS_VIDEO = 0x08, |
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VB_HAS_PALETTE = 0x10, |
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VB_HAS_LENGTH = 0x20 |
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}; |
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typedef struct VBDecContext { |
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AVCodecContext *avctx; |
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AVFrame pic; |
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uint8_t *frame, *prev_frame; |
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uint32_t pal[256]; |
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uint8_t *stream; |
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} VBDecContext; |
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static const uint16_t vb_patterns[64] = { |
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0x0660, 0xFF00, 0xCCCC, 0xF000, 0x8888, 0x000F, 0x1111, 0xFEC8, |
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0x8CEF, 0x137F, 0xF731, 0xC800, 0x008C, 0x0013, 0x3100, 0xCC00, |
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0x00CC, 0x0033, 0x3300, 0x0FF0, 0x6666, 0x00F0, 0x0F00, 0x2222, |
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0x4444, 0xF600, 0x8CC8, 0x006F, 0x1331, 0x318C, 0xC813, 0x33CC, |
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0x6600, 0x0CC0, 0x0066, 0x0330, 0xF900, 0xC88C, 0x009F, 0x3113, |
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0x6000, 0x0880, 0x0006, 0x0110, 0xCC88, 0xFC00, 0x00CF, 0x88CC, |
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0x003F, 0x1133, 0x3311, 0xF300, 0x6FF6, 0x0603, 0x08C6, 0x8C63, |
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0xC631, 0x6310, 0xC060, 0x0136, 0x136C, 0x36C8, 0x6C80, 0x324C |
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}; |
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static void vb_decode_palette(VBDecContext *c) |
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{ |
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int start, size, i; |
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start = bytestream_get_byte(&c->stream); |
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size = (bytestream_get_byte(&c->stream) - 1) & 0xFF; |
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if(start + size > 255){ |
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av_log(c->avctx, AV_LOG_ERROR, "Palette change runs beyond entry 256\n"); |
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return; |
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} |
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for(i = start; i <= start + size; i++) |
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c->pal[i] = bytestream_get_be24(&c->stream); |
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} |
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static inline int check_pixel(uint8_t *buf, uint8_t *start, uint8_t *end) |
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{ |
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return buf >= start && buf < end; |
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} |
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static inline int check_line(uint8_t *buf, uint8_t *start, uint8_t *end) |
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{ |
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return buf >= start && (buf + 4) <= end; |
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} |
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static int vb_decode_framedata(VBDecContext *c, uint8_t *buf, int offset) |
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{ |
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uint8_t *prev, *cur; |
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int blk, blocks, t, blk2; |
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int blocktypes = 0; |
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int x, y, a, b; |
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int pattype, pattern; |
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const int width = c->avctx->width; |
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uint8_t *pstart = c->prev_frame; |
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uint8_t *pend = c->prev_frame + width*c->avctx->height; |
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prev = c->prev_frame + offset; |
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cur = c->frame; |
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blocks = (c->avctx->width >> 2) * (c->avctx->height >> 2); |
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blk2 = 0; |
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for(blk = 0; blk < blocks; blk++){ |
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if(!(blk & 3)) |
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blocktypes = bytestream_get_byte(&buf); |
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switch(blocktypes & 0xC0){ |
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case 0x00: //skip
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for(y = 0; y < 4; y++) |
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if(check_line(prev + y*width, pstart, pend)) |
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memcpy(cur + y*width, prev + y*width, 4); |
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else |
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memset(cur + y*width, 0, 4); |
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break; |
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case 0x40: |
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t = bytestream_get_byte(&buf); |
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if(!t){ //raw block
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for(y = 0; y < 4; y++) |
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memcpy(cur + y*width, buf + y*4, 4); |
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buf += 16; |
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}else{ // motion compensation
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x = ((t & 0xF)^8) - 8; |
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y = ((t >> 4) ^8) - 8; |
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t = x + y*width; |
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for(y = 0; y < 4; y++) |
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if(check_line(prev + t + y*width, pstart, pend)) |
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memcpy(cur + y*width, prev + t + y*width, 4); |
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else |
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memset(cur + y*width, 0, 4); |
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} |
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break; |
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case 0x80: // fill
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t = bytestream_get_byte(&buf); |
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for(y = 0; y < 4; y++) |
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memset(cur + y*width, t, 4); |
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break; |
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case 0xC0: // pattern fill
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t = bytestream_get_byte(&buf); |
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pattype = t >> 6; |
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pattern = vb_patterns[t & 0x3F]; |
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switch(pattype){ |
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case 0: |
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a = bytestream_get_byte(&buf); |
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b = bytestream_get_byte(&buf); |
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for(y = 0; y < 4; y++) |
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for(x = 0; x < 4; x++, pattern >>= 1) |
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cur[x + y*width] = (pattern & 1) ? b : a; |
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break; |
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case 1: |
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pattern = ~pattern; |
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case 2: |
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a = bytestream_get_byte(&buf); |
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for(y = 0; y < 4; y++) |
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for(x = 0; x < 4; x++, pattern >>= 1) |
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if(pattern & 1 && check_pixel(prev + x + y*width, pstart, pend)) |
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cur[x + y*width] = prev[x + y*width]; |
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else |
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cur[x + y*width] = a; |
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break; |
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case 3: |
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av_log(c->avctx, AV_LOG_ERROR, "Invalid opcode seen @%d\n",blk); |
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return -1; |
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} |
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break; |
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} |
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blocktypes <<= 2; |
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cur += 4; |
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prev += 4; |
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blk2++; |
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if(blk2 == (width >> 2)){ |
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blk2 = 0; |
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cur += width * 3; |
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prev += width * 3; |
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} |
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} |
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return 0; |
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} |
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static int decode_frame(AVCodecContext *avctx, void *data, int *data_size, uint8_t *buf, int buf_size) |
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{ |
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VBDecContext * const c = avctx->priv_data; |
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uint8_t *outptr, *srcptr; |
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int i, j; |
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int flags; |
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uint32_t size; |
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int rest = buf_size; |
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int offset = 0; |
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c->stream = buf; |
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flags = bytestream_get_le16(&c->stream); |
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rest -= 2; |
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if(flags & VB_HAS_GMC){ |
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i = (int16_t)bytestream_get_le16(&c->stream); |
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j = (int16_t)bytestream_get_le16(&c->stream); |
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offset = i + j * avctx->width; |
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rest -= 4; |
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} |
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if(flags & VB_HAS_VIDEO){ |
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size = bytestream_get_le32(&c->stream); |
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if(size > rest){ |
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av_log(avctx, AV_LOG_ERROR, "Frame size is too big\n"); |
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return -1; |
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} |
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vb_decode_framedata(c, c->stream, offset); |
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c->stream += size - 4; |
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rest -= size; |
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} |
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if(flags & VB_HAS_PALETTE){ |
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size = bytestream_get_le32(&c->stream); |
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if(size > rest){ |
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av_log(avctx, AV_LOG_ERROR, "Palette size is too big\n"); |
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return -1; |
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} |
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vb_decode_palette(c); |
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rest -= size; |
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} |
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memcpy(c->pic.data[1], c->pal, AVPALETTE_SIZE); |
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c->pic.palette_has_changed = flags & VB_HAS_PALETTE; |
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outptr = c->pic.data[0]; |
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srcptr = c->frame; |
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for(i = 0; i < avctx->height; i++){ |
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memcpy(outptr, srcptr, avctx->width); |
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srcptr += avctx->width; |
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outptr += c->pic.linesize[0]; |
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} |
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FFSWAP(uint8_t*, c->frame, c->prev_frame); |
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*data_size = sizeof(AVFrame); |
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*(AVFrame*)data = c->pic; |
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/* always report that the buffer was completely consumed */ |
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return buf_size; |
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} |
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static int decode_init(AVCodecContext *avctx) |
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{ |
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VBDecContext * const c = avctx->priv_data; |
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c->avctx = avctx; |
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avctx->pix_fmt = PIX_FMT_PAL8; |
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if (avcodec_check_dimensions(avctx, avctx->width, avctx->height) < 0) { |
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return -1; |
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} |
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c->pic.reference = 1; |
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if(avctx->get_buffer(avctx, &c->pic) < 0){ |
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av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n"); |
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return -1; |
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} |
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c->frame = av_malloc( avctx->width * avctx->height); |
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c->prev_frame = av_malloc( avctx->width * avctx->height); |
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return 0; |
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} |
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static int decode_end(AVCodecContext *avctx) |
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{ |
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VBDecContext *c = avctx->priv_data; |
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av_freep(&c->frame); |
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av_freep(&c->prev_frame); |
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if(c->pic.data[0]) |
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avctx->release_buffer(avctx, &c->pic); |
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return 0; |
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} |
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AVCodec vb_decoder = { |
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"vb", |
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CODEC_TYPE_VIDEO, |
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CODEC_ID_VB, |
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sizeof(VBDecContext), |
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decode_init, |
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NULL, |
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decode_end, |
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decode_frame |
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}; |
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@ -0,0 +1,238 @@ |
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/*
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* Beam Software SIFF demuxer |
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* Copyright (c) 2007 Konstantin Shishkov. |
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* |
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* This file is part of FFmpeg. |
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* |
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* FFmpeg is free software; you can redistribute it and/or |
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* modify it under the terms of the GNU Lesser General Public |
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* License as published by the Free Software Foundation; either |
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* version 2.1 of the License, or (at your option) any later version. |
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* |
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* FFmpeg is distributed in the hope that it will be useful, |
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* but WITHOUT ANY WARRANTY; without even the implied warranty of |
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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* Lesser General Public License for more details. |
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* |
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* You should have received a copy of the GNU Lesser General Public |
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* License along with FFmpeg; if not, write to the Free Software |
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
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*/ |
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#include "avformat.h" |
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#include "riff.h" |
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enum SIFFTags{ |
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TAG_SIFF = MKTAG('S', 'I', 'F', 'F'), |
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TAG_BODY = MKTAG('B', 'O', 'D', 'Y'), |
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TAG_VBHD = MKTAG('V', 'B', 'H', 'D'), |
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TAG_SHDR = MKTAG('S', 'H', 'D', 'R'), |
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TAG_VBV1 = MKTAG('V', 'B', 'V', '1'), |
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TAG_SOUN = MKTAG('S', 'O', 'U', 'N'), |
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}; |
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enum VBFlags{ |
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VB_HAS_GMC = 0x01, |
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VB_HAS_AUDIO = 0x04, |
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VB_HAS_VIDEO = 0x08, |
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VB_HAS_PALETTE = 0x10, |
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VB_HAS_LENGTH = 0x20 |
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}; |
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typedef struct SIFFContext{ |
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int frames; |
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int cur_frame; |
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int rate; |
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int bits; |
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int block_align; |
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int has_video; |
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int has_audio; |
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int curstrm; |
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int pktsize; |
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int gmcsize; |
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int sndsize; |
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int flags; |
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uint8_t gmc[4]; |
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}SIFFContext; |
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static int siff_probe(AVProbeData *p) |
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{ |
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/* check file header */ |
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if (AV_RL32(p->buf) == TAG_SIFF) |
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return AVPROBE_SCORE_MAX; |
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else |
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return 0; |
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} |
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static int create_audio_stream(AVFormatContext *s, SIFFContext *c) |
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{ |
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AVStream *ast; |
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ast = av_new_stream(s, 0); |
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if (!ast) |
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return -1; |
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ast->codec->codec_type = CODEC_TYPE_AUDIO; |
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ast->codec->codec_id = CODEC_ID_PCM_U8; |
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ast->codec->channels = 1; |
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ast->codec->bits_per_sample = c->bits; |
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ast->codec->sample_rate = c->rate; |
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ast->codec->frame_size = c->block_align; |
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av_set_pts_info(ast, 16, 1, c->rate); |
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return 0; |
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} |
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static int siff_parse_vbv1(AVFormatContext *s, SIFFContext *c, ByteIOContext *pb) |
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{ |
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AVStream *st; |
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int width, height; |
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if (get_le32(pb) != TAG_VBHD){ |
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av_log(s, AV_LOG_ERROR, "Header chunk is missing\n"); |
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return -1; |
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} |
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if(get_be32(pb) != 32){ |
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av_log(s, AV_LOG_ERROR, "Header chunk size is incorrect\n"); |
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return -1; |
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} |
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if(get_le16(pb) != 1){ |
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av_log(s, AV_LOG_ERROR, "Incorrect header version\n"); |
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return -1; |
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} |
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width = get_le16(pb); |
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height = get_le16(pb); |
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url_fskip(pb, 4); |
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c->frames = get_le16(pb); |
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if(!c->frames){ |
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av_log(s, AV_LOG_ERROR, "File contains no frames ???\n"); |
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return -1; |
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} |
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c->bits = get_le16(pb); |
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c->rate = get_le16(pb); |
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c->block_align = c->rate * (c->bits >> 3); |
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url_fskip(pb, 16); //zeroes
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st = av_new_stream(s, 0); |
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if (!st) |
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return -1; |
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st->codec->codec_type = CODEC_TYPE_VIDEO; |
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st->codec->codec_id = CODEC_ID_VB; |
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st->codec->codec_tag = MKTAG('V', 'B', 'V', '1'); |
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st->codec->width = width; |
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st->codec->height = height; |
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st->codec->pix_fmt = PIX_FMT_PAL8; |
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av_set_pts_info(st, 16, 1, 12); |
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c->cur_frame = 0; |
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c->has_video = 1; |
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c->has_audio = !!c->rate; |
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c->curstrm = -1; |
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if (c->has_audio && create_audio_stream(s, c) < 0) |
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return -1; |
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return 0; |
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} |
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static int siff_parse_soun(AVFormatContext *s, SIFFContext *c, ByteIOContext *pb) |
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{ |
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if (get_le32(pb) != TAG_SHDR){ |
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av_log(s, AV_LOG_ERROR, "Header chunk is missing\n"); |
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return -1; |
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} |
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if(get_be32(pb) != 8){ |
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av_log(s, AV_LOG_ERROR, "Header chunk size is incorrect\n"); |
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return -1; |
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} |
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url_fskip(pb, 4); //unknown value
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c->rate = get_le16(pb); |
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c->bits = get_le16(pb); |
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c->block_align = c->rate * (c->bits >> 3); |
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return create_audio_stream(s, c); |
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} |
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static int siff_read_header(AVFormatContext *s, AVFormatParameters *ap) |
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{ |
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ByteIOContext *pb = &s->pb; |
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SIFFContext *c = s->priv_data; |
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uint32_t tag; |
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if (get_le32(pb) != TAG_SIFF) |
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return -1; |
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url_fskip(pb, 4); //ignore size
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tag = get_le32(pb); |
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if (tag != TAG_VBV1 && tag != TAG_SOUN){ |
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av_log(s, AV_LOG_ERROR, "Not a VBV file\n"); |
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return -1; |
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} |
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if (tag == TAG_VBV1 && siff_parse_vbv1(s, c, pb) < 0) |
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return -1; |
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if (tag == TAG_SOUN && siff_parse_soun(s, c, pb) < 0) |
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return -1; |
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if (get_le32(pb) != MKTAG('B', 'O', 'D', 'Y')){ |
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av_log(s, AV_LOG_ERROR, "'BODY' chunk is missing\n"); |
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return -1; |
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} |
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url_fskip(pb, 4); //ignore size
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return 0; |
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} |
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static int siff_read_packet(AVFormatContext *s, AVPacket *pkt) |
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{ |
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SIFFContext *c = s->priv_data; |
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int size, size2; |
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uint8_t *snddata; |
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if (c->has_video){ |
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if (c->cur_frame >= c->frames) |
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return AVERROR(EIO); |
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if (c->curstrm == -1){ |
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c->pktsize = get_le32(&s->pb) - 4; |
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c->flags = get_le16(&s->pb); |
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c->gmcsize = (c->flags & VB_HAS_GMC) ? 4 : 0; |
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if (c->gmcsize) |
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get_buffer(&s->pb, c->gmc, c->gmcsize); |
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c->sndsize = (c->flags & VB_HAS_AUDIO) ? get_le32(&s->pb): 0; |
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c->curstrm = !!(c->flags & VB_HAS_AUDIO); |
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} |
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if (!c->curstrm){ |
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size = c->pktsize - c->sndsize; |
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if (av_new_packet(pkt, size) < 0) |
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return AVERROR(ENOMEM); |
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AV_WL16(pkt->data, c->flags); |
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if (c->gmcsize) |
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memcpy(pkt->data + 2, c->gmc, c->gmcsize); |
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get_buffer(&s->pb, pkt->data + 2 + c->gmcsize, size - c->gmcsize - 2); |
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pkt->stream_index = 0; |
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c->curstrm = -1; |
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}else{ |
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if (av_get_packet(&s->pb, pkt, c->sndsize - 4) < 0) |
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return AVERROR(EIO); |
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pkt->stream_index = 1; |
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c->curstrm = 0; |
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} |
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if(!c->cur_frame || c->curstrm) |
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pkt->flags |= PKT_FLAG_KEY; |
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if (c->curstrm == -1) |
||||
c->cur_frame++; |
||||
}else{ |
||||
size = av_get_packet(&s->pb, pkt, c->block_align); |
||||
if(size <= 0) |
||||
return AVERROR(EIO); |
||||
} |
||||
return pkt->size; |
||||
} |
||||
|
||||
AVInputFormat siff_demuxer = { |
||||
"siff", |
||||
"Beam Software SIFF", |
||||
sizeof(SIFFContext), |
||||
siff_probe, |
||||
siff_read_header, |
||||
siff_read_packet, |
||||
.extensions = "vb,son" |
||||
}; |
Loading…
Reference in new issue