mirror of https://github.com/FFmpeg/FFmpeg.git
Originally committed as revision 4141 to svn://svn.ffmpeg.org/ffmpeg/trunkpull/126/head
Michael Niedermayer
20 years ago
parent
29df259923
commit
856dbbff7f
6 changed files with 293 additions and 1 deletions
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/*
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* Indel Indeo 2 codec |
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* Copyright (c) 2005 Konstantin Shishkov |
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* |
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* This library 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 of the License, or (at your option) any later version. |
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* |
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* This library 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 this library; if not, write to the Free Software |
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
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* |
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*/ |
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/**
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* @file indeo2.c |
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* Intel Indeo 2 decoder. |
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*/ |
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#include "avcodec.h" |
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#include "bitstream.h" |
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#include "indeo2data.h" |
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typedef struct Ir2Context{ |
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AVCodecContext *avctx; |
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AVFrame picture; |
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GetBitContext gb; |
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int decode_delta; |
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} Ir2Context; |
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#define CODE_VLC_BITS 14 |
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static VLC ir2_vlc; |
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/* Indeo 2 codes are in range 0x01..0x7F and 0x81..0x90 */ |
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static inline int ir2_get_code(GetBitContext *gb) |
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{ |
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int code; |
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code = get_vlc2(gb, ir2_vlc.table, CODE_VLC_BITS, 1) + 1; |
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if (code >= 0x80) |
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return (code + 1); |
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return code; |
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} |
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#define CLAMP_TO_BYTE(value) \ |
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if (value > 255) \
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value = 255; \
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else if (value < 0) \
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value = 0; \
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static void ir2_decode_plane(Ir2Context *ctx, int width, int height, uint8_t *dst, int stride, |
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const uint8_t *table) |
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{ |
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int i; |
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int j; |
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int out = 0; |
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int c; |
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int t; |
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/* first line contain absolute values, other lines contain deltas */ |
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while (out < width){ |
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c = ir2_get_code(&ctx->gb); |
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if(c > 0x80) { /* we have a run */ |
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c -= 0x80; |
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for (i = 0; i < c * 2; i++) |
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dst[out++] = 0x80; |
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} else { /* copy two values from table */ |
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dst[out++] = table[c * 2]; |
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dst[out++] = table[(c * 2) + 1]; |
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} |
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} |
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dst += stride; |
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for (j = 1; j < height; j++){ |
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out = 0; |
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while (out < width){ |
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c = ir2_get_code(&ctx->gb); |
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if(c > 0x80) { /* we have a skip */ |
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c -= 0x80; |
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for (i = 0; i < c * 2; i++) { |
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dst[out] = dst[out - stride]; |
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out++; |
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} |
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} else { /* add two deltas from table */ |
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t = dst[out - stride] + (table[c * 2] - 128); |
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CLAMP_TO_BYTE(t); |
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dst[out] = t; |
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out++; |
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t = dst[out - stride] + (table[(c * 2) + 1] - 128); |
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CLAMP_TO_BYTE(t); |
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dst[out] = t; |
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out++; |
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} |
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} |
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dst += stride; |
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} |
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} |
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static void ir2_decode_plane_inter(Ir2Context *ctx, int width, int height, uint8_t *dst, int stride, |
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const uint8_t *table) |
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{ |
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int j; |
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int out = 0; |
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int c; |
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int t; |
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for (j = 0; j < height; j++){ |
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out = 0; |
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while (out < width){ |
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c = ir2_get_code(&ctx->gb); |
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if(c > 0x80) { /* we have a skip */ |
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c -= 0x80; |
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out += c * 2; |
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} else { /* add two deltas from table */ |
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t = dst[out] + (table[c * 2] - 128); |
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CLAMP_TO_BYTE(t); |
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dst[out] = t; |
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out++; |
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t = dst[out] + (table[(c * 2) + 1] - 128); |
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CLAMP_TO_BYTE(t); |
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dst[out] = t; |
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out++; |
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} |
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} |
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dst += stride; |
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} |
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} |
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static int ir2_decode_frame(AVCodecContext *avctx,
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void *data, int *data_size, |
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uint8_t *buf, int buf_size) |
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{ |
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Ir2Context * const s = avctx->priv_data; |
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AVFrame *picture = data; |
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AVFrame * const p= (AVFrame*)&s->picture; |
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int start; |
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int i; |
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if(p->data[0]) |
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avctx->release_buffer(avctx, p); |
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p->reference = 1; |
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p->buffer_hints = FF_BUFFER_HINTS_VALID | FF_BUFFER_HINTS_PRESERVE | FF_BUFFER_HINTS_REUSABLE; |
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if (avctx->reget_buffer(avctx, p)) { |
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av_log(s->avctx, AV_LOG_ERROR, "reget_buffer() failed\n"); |
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return -1; |
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} |
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s->decode_delta = buf[18]; |
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/* decide whether frame uses deltas or not */ |
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for (i = 0; i < buf_size; i++) |
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buf[i] = ff_reverse[buf[i]]; |
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start = 48; /* hardcoded for now */ |
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init_get_bits(&s->gb, buf + start, buf_size - start); |
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if (s->decode_delta) { /* intraframe */ |
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ir2_decode_plane(s, avctx->width, avctx->height, |
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s->picture.data[0], s->picture.linesize[0], ir2_luma_table); |
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/* swapped U and V */ |
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ir2_decode_plane(s, avctx->width >> 2, avctx->height >> 2, |
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s->picture.data[2], s->picture.linesize[2], ir2_luma_table); |
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ir2_decode_plane(s, avctx->width >> 2, avctx->height >> 2, |
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s->picture.data[1], s->picture.linesize[1], ir2_luma_table); |
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} else { /* interframe */ |
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ir2_decode_plane_inter(s, avctx->width, avctx->height, |
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s->picture.data[0], s->picture.linesize[0], ir2_luma_table); |
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/* swapped U and V */ |
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ir2_decode_plane_inter(s, avctx->width >> 2, avctx->height >> 2, |
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s->picture.data[2], s->picture.linesize[2], ir2_luma_table); |
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ir2_decode_plane_inter(s, avctx->width >> 2, avctx->height >> 2, |
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s->picture.data[1], s->picture.linesize[1], ir2_luma_table); |
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} |
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*picture= *(AVFrame*)&s->picture; |
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*data_size = sizeof(AVPicture); |
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return buf_size; |
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} |
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static int ir2_decode_init(AVCodecContext *avctx){ |
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Ir2Context * const ic = avctx->priv_data; |
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ic->avctx = avctx; |
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avctx->pix_fmt= PIX_FMT_YUV410P; |
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if (!ir2_vlc.table) |
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init_vlc(&ir2_vlc, CODE_VLC_BITS, IR2_CODES, |
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&ir2_codes[0][1], 4, 2, |
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&ir2_codes[0][0], 4, 2, 1);
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return 0; |
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} |
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AVCodec indeo2_decoder = { |
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"indeo2", |
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CODEC_TYPE_VIDEO, |
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CODEC_ID_INDEO2, |
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sizeof(Ir2Context), |
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ir2_decode_init, |
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NULL, |
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NULL, |
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ir2_decode_frame, |
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CODEC_CAP_DR1, |
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}; |
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@ -0,0 +1,74 @@ |
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#define IR2_CODES 143 |
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static const uint16_t ir2_codes[IR2_CODES][2] = { |
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{0x0000, 3}, {0x0001, 3}, {0x0003, 3}, {0x0010, 5}, |
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{0x0012, 5}, {0x0013, 5}, {0x0016, 5}, {0x0017, 5}, |
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{0x0031, 6}, {0x0032, 6}, {0x0033, 6}, {0x0034, 6}, |
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{0x0035, 6}, {0x0036, 6}, {0x00E0, 8}, {0x00E1, 8}, |
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{0x00E4, 8}, {0x00E5, 8}, {0x00E6, 8}, {0x00E7, 8}, |
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{0x00E9, 8}, {0x00EA, 8}, {0x00EC, 8}, {0x00ED, 8}, |
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{0x00EF, 8}, {0x01E0, 9}, {0x01E2, 9}, {0x01E3, 9}, |
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{0x01E5, 9}, {0x01E6, 9}, {0x01E8, 9}, {0x01E9, 9}, |
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{0x01EB, 9}, {0x01EC, 9}, {0x01EE, 9}, {0x01EF, 9}, |
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{0x03E0, 10}, {0x03E1, 10}, {0x03E2, 10}, {0x03E3, 10}, |
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{0x03E4, 10}, {0x03E5, 10}, {0x03E6, 10}, {0x03E7, 10}, |
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{0x03E8, 10}, {0x03E9, 10}, {0x03EA, 10}, {0x03EB, 10}, |
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{0x03EC, 10}, {0x03ED, 10}, {0x03EE, 10}, {0x03EF, 10}, |
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{0x1F80, 13}, {0x1F81, 13}, {0x1F82, 13}, {0x1F83, 13}, |
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{0x1F84, 13}, {0x1F85, 13}, {0x1F86, 13}, {0x1F87, 13}, |
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{0x1F88, 13}, {0x1F89, 13}, {0x1F8A, 13}, {0x1F8B, 13}, |
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{0x1F8C, 13}, {0x1F8D, 13}, {0x1F8E, 13}, {0x1F8F, 13}, |
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{0x1F90, 13}, {0x1F91, 13}, {0x1F92, 13}, {0x1F93, 13}, |
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{0x1F94, 13}, {0x1F95, 13}, {0x1F96, 13}, {0x1F97, 13}, |
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{0x1F98, 13}, {0x1F99, 13}, {0x1F9A, 13}, {0x1F9B, 13}, |
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{0x1F9C, 13}, {0x1F9D, 13}, {0x1F9E, 13}, {0x1F9F, 13}, |
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{0x1FA0, 13}, {0x1FA1, 13}, {0x1FA2, 13}, {0x1FA3, 13}, |
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{0x1FA4, 13}, {0x1FA5, 13}, {0x1FA6, 13}, {0x1FA7, 13}, |
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{0x1FA8, 13}, {0x1FA9, 13}, {0x1FAA, 13}, {0x1FAB, 13}, |
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{0x1FAC, 13}, {0x1FAD, 13}, {0x1FAE, 13}, {0x1FAF, 13}, |
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{0x1FB0, 13}, {0x1FB1, 13}, {0x1FB2, 13}, {0x1FB3, 13}, |
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{0x1FB4, 13}, {0x1FB5, 13}, {0x1FB6, 13}, {0x1FB7, 13}, |
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{0x1FB8, 13}, {0x1FB9, 13}, {0x1FBA, 13}, {0x1FBB, 13}, |
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{0x1FBC, 13}, {0x1FBD, 13}, {0x1FBE, 13}, {0x1FBF, 13}, |
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{0x3F80, 14}, {0x3F81, 14}, {0x3F82, 14}, {0x3F83, 14}, |
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{0x3F84, 14}, {0x3F85, 14}, {0x3F86, 14}, {0x3F87, 14}, |
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{0x3F88, 14}, {0x3F89, 14}, {0x3F8A, 14}, {0x0002, 3}, |
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{0x0011, 5}, {0x0014, 5}, {0x0015, 5}, {0x0030, 6}, |
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{0x0037, 6}, {0x00E2, 8}, {0x00E3, 8}, {0x00E8, 8}, |
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{0x00EB, 8}, {0x00EE, 8}, {0x01E1, 9}, {0x01E4, 9}, |
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{0x01E7, 9}, {0x01EA, 9}, {0x01ED, 9} |
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}; |
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static const uint8_t ir2_luma_table[256] = { |
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0x80, 0x80, 0x84, 0x84, 0x7C, 0x7C, 0x7F, 0x85, |
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0x81, 0x7B, 0x85, 0x7F, 0x7B, 0x81, 0x8C, 0x8C, |
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0x74, 0x74, 0x83, 0x8D, 0x7D, 0x73, 0x8D, 0x83, |
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0x73, 0x7D, 0x77, 0x89, 0x89, 0x77, 0x89, 0x77, |
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0x77, 0x89, 0x8C, 0x95, 0x74, 0x6B, 0x95, 0x8C,
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0x6B, 0x74, 0x7C, 0x90, 0x84, 0x70, 0x90, 0x7C, |
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0x70, 0x84, 0x96, 0x96, 0x6A, 0x6A, 0x82, 0x98,
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0x7E, 0x68, 0x98, 0x82, 0x68, 0x7E, 0x97, 0xA2, |
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0x69, 0x5E, 0xA2, 0x97, 0x5E, 0x69, 0xA2, 0xA2,
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0x5E, 0x5E, 0x8B, 0xA3, 0x75, 0x5D, 0xA3, 0x8B, |
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0x5D, 0x75, 0x71, 0x95, 0x8F, 0x6B, 0x95, 0x71,
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0x6B, 0x8F, 0x78, 0x9D, 0x88, 0x63, 0x9D, 0x78, |
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0x63, 0x88, 0x7F, 0xA7, 0x81, 0x59, 0xA7, 0x7F,
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0x59, 0x81, 0xA4, 0xB1, 0x5C, 0x4F, 0xB1, 0xA4, |
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0x4F, 0x5C, 0x96, 0xB1, 0x6A, 0x4F, 0xB1, 0x96,
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0x4F, 0x6A, 0xB2, 0xB2, 0x4E, 0x4E, 0x65, 0x9B, |
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0x9B, 0x65, 0x9B, 0x65, 0x65, 0x9B, 0x89, 0xB4,
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0x77, 0x4C, 0xB4, 0x89, 0x4C, 0x77, 0x6A, 0xA3, |
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0x96, 0x5D, 0xA3, 0x6A, 0x5D, 0x96, 0x73, 0xAC,
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0x8D, 0x54, 0xAC, 0x73, 0x54, 0x8D, 0xB4, 0xC3, |
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0x4C, 0x3D, 0xC3, 0xB4, 0x3D, 0x4C, 0xA4, 0xC3,
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0x5C, 0x3D, 0xC3, 0xA4, 0x3D, 0x5C, 0xC4, 0xC4, |
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0x3C, 0x3C, 0x96, 0xC6, 0x6A, 0x3A, 0xC6, 0x96,
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0x3A, 0x6A, 0x7C, 0xBA, 0x84, 0x46, 0xBA, 0x7C, |
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0x46, 0x84, 0x5B, 0xAB, 0xA5, 0x55, 0xAB, 0x5B,
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0x55, 0xA5, 0x63, 0xB4, 0x9D, 0x4C, 0xB4, 0x63, |
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0x4C, 0x9D, 0x86, 0xCA, 0x7A, 0x36, 0xCA, 0x86,
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0x36, 0x7A, 0xB6, 0xD7, 0x4A, 0x29, 0xD7, 0xB6, |
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0x29, 0x4A, 0xC8, 0xD7, 0x38, 0x29, 0xD7, 0xC8,
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0x29, 0x38, 0xA4, 0xD8, 0x5C, 0x28, 0xD8, 0xA4, |
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0x28, 0x5C, 0x6C, 0xC1, 0x94, 0x3F, 0xC1, 0x6C,
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0x3F, 0x94, 0xD9, 0xD9, 0x27, 0x27, 0x80, 0x80 |
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}; |
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