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Diffstat (limited to 'contrib/ffmpeg/libavcodec/fraps.c')
| -rw-r--r-- | contrib/ffmpeg/libavcodec/fraps.c | 398 |
1 files changed, 0 insertions, 398 deletions
diff --git a/contrib/ffmpeg/libavcodec/fraps.c b/contrib/ffmpeg/libavcodec/fraps.c deleted file mode 100644 index 0a4567d05..000000000 --- a/contrib/ffmpeg/libavcodec/fraps.c +++ /dev/null @@ -1,398 +0,0 @@ -/* - * Fraps FPS1 decoder - * Copyright (c) 2005 Roine Gustafsson - * Copyright (c) 2006 Konstantin Shishkov - * - * 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 fraps.c - * Lossless Fraps 'FPS1' decoder - * @author Roine Gustafsson <roine at users sf net> - * @author Konstantin Shishkov - * - * Codec algorithm for version 0 is taken from Transcode <www.transcoding.org> - * - * Version 2 files support by Konstantin Shishkov - */ - -#include "avcodec.h" -#include "bitstream.h" -#include "dsputil.h" - -#define FPS_TAG MKTAG('F', 'P', 'S', 'x') - -/* symbol for Huffman tree node */ -#define HNODE -1 - -/** - * Huffman node - * FIXME one day this should belong to one general framework - */ -typedef struct Node{ - int16_t sym; - int16_t n0; - int count; -}Node; - -/** - * local variable storage - */ -typedef struct FrapsContext{ - AVCodecContext *avctx; - AVFrame frame; - Node nodes[512]; - uint8_t *tmpbuf; - DSPContext dsp; -} FrapsContext; - - -/** - * initializes decoder - * @param avctx codec context - * @return 0 on success or negative if fails - */ -static int decode_init(AVCodecContext *avctx) -{ - FrapsContext * const s = avctx->priv_data; - - avctx->coded_frame = (AVFrame*)&s->frame; - avctx->has_b_frames = 0; - avctx->pix_fmt= PIX_FMT_NONE; /* set in decode_frame */ - - s->avctx = avctx; - s->frame.data[0] = NULL; - s->tmpbuf = NULL; - - dsputil_init(&s->dsp, avctx); - - return 0; -} - -/** - * Comparator - our nodes should ascend by count - * but with preserved symbol order - */ -static int huff_cmp(const Node *a, const Node *b){ - return (a->count - b->count)*256 + a->sym - b->sym; -} - -static void get_tree_codes(uint32_t *bits, int16_t *lens, uint8_t *xlat, Node *nodes, int node, uint32_t pfx, int pl, int *pos) -{ - int s; - - s = nodes[node].sym; - if(s != HNODE || !nodes[node].count){ - bits[*pos] = pfx; - lens[*pos] = pl; - xlat[*pos] = s; - (*pos)++; - }else{ - pfx <<= 1; - pl++; - get_tree_codes(bits, lens, xlat, nodes, nodes[node].n0, pfx, pl, pos); - pfx |= 1; - get_tree_codes(bits, lens, xlat, nodes, nodes[node].n0+1, pfx, pl, pos); - } -} - -static int build_huff_tree(VLC *vlc, Node *nodes, uint8_t *xlat) -{ - uint32_t bits[256]; - int16_t lens[256]; - int pos = 0; - - get_tree_codes(bits, lens, xlat, nodes, 510, 0, 0, &pos); - return init_vlc(vlc, 9, pos, lens, 2, 2, bits, 4, 4, 0); -} - - -/** - * decode Fraps v2 packed plane - */ -static int fraps2_decode_plane(FrapsContext *s, uint8_t *dst, int stride, int w, - int h, uint8_t *src, int size, int Uoff) -{ - int i, j; - int cur_node; - GetBitContext gb; - VLC vlc; - int64_t sum = 0; - uint8_t recode[256]; - - for(i = 0; i < 256; i++){ - s->nodes[i].sym = i; - s->nodes[i].count = AV_RL32(src); - s->nodes[i].n0 = -2; - if(s->nodes[i].count < 0) { - av_log(s->avctx, AV_LOG_ERROR, "Symbol count < 0\n"); - return -1; - } - src += 4; - sum += s->nodes[i].count; - } - size -= 1024; - - if(sum >> 31) { - av_log(s->avctx, AV_LOG_ERROR, "Too high symbol frequencies. Tree construction is not possible\n"); - return -1; - } - qsort(s->nodes, 256, sizeof(Node), huff_cmp); - cur_node = 256; - for(i = 0; i < 511; i += 2){ - s->nodes[cur_node].sym = HNODE; - s->nodes[cur_node].count = s->nodes[i].count + s->nodes[i+1].count; - s->nodes[cur_node].n0 = i; - for(j = cur_node; j > 0; j--){ - if(s->nodes[j].count >= s->nodes[j - 1].count) break; - FFSWAP(Node, s->nodes[j], s->nodes[j - 1]); - } - cur_node++; - } - if(build_huff_tree(&vlc, s->nodes, recode) < 0){ - av_log(s->avctx, AV_LOG_ERROR, "Error building tree\n"); - return -1; - } - /* we have built Huffman table and are ready to decode plane */ - - /* convert bits so they may be used by standard bitreader */ - s->dsp.bswap_buf(s->tmpbuf, src, size >> 2); - - init_get_bits(&gb, s->tmpbuf, size * 8); - for(j = 0; j < h; j++){ - for(i = 0; i < w; i++){ - dst[i] = recode[get_vlc2(&gb, vlc.table, 9, 3)]; - /* lines are stored as deltas between previous lines - * and we need to add 0x80 to the first lines of chroma planes - */ - if(j) dst[i] += dst[i - stride]; - else if(Uoff) dst[i] += 0x80; - } - dst += stride; - } - free_vlc(&vlc); - return 0; -} - -/** - * decode a frame - * @param avctx codec context - * @param data output AVFrame - * @param data_size size of output data or 0 if no picture is returned - * @param buf input data frame - * @param buf_size size of input data frame - * @return number of consumed bytes on success or negative if decode fails - */ -static int decode_frame(AVCodecContext *avctx, - void *data, int *data_size, - uint8_t *buf, int buf_size) -{ - FrapsContext * const s = avctx->priv_data; - AVFrame *frame = data; - AVFrame * const f = (AVFrame*)&s->frame; - uint32_t header; - unsigned int version,header_size; - unsigned int x, y; - uint32_t *buf32; - uint32_t *luma1,*luma2,*cb,*cr; - uint32_t offs[4]; - int i, is_chroma, planes; - - - header = AV_RL32(buf); - version = header & 0xff; - header_size = (header & (1<<30))? 8 : 4; /* bit 30 means pad to 8 bytes */ - - if (version > 2 && version != 4) { - av_log(avctx, AV_LOG_ERROR, - "This file is encoded with Fraps version %d. " \ - "This codec can only decode version 0, 1, 2 and 4.\n", version); - return -1; - } - - buf+=4; - if (header_size == 8) - buf+=4; - - switch(version) { - case 0: - default: - /* Fraps v0 is a reordered YUV420 */ - avctx->pix_fmt = PIX_FMT_YUV420P; - - if ( (buf_size != avctx->width*avctx->height*3/2+header_size) && - (buf_size != header_size) ) { - av_log(avctx, AV_LOG_ERROR, - "Invalid frame length %d (should be %d)\n", - buf_size, avctx->width*avctx->height*3/2+header_size); - return -1; - } - - if (( (avctx->width % 8) != 0) || ( (avctx->height % 2) != 0 )) { - av_log(avctx, AV_LOG_ERROR, "Invalid frame size %dx%d\n", - avctx->width, avctx->height); - return -1; - } - - f->reference = 1; - f->buffer_hints = FF_BUFFER_HINTS_VALID | - FF_BUFFER_HINTS_PRESERVE | - FF_BUFFER_HINTS_REUSABLE; - if (avctx->reget_buffer(avctx, f)) { - av_log(avctx, AV_LOG_ERROR, "reget_buffer() failed\n"); - return -1; - } - /* bit 31 means same as previous pic */ - f->pict_type = (header & (1<<31))? FF_P_TYPE : FF_I_TYPE; - f->key_frame = f->pict_type == FF_I_TYPE; - - if (f->pict_type == FF_I_TYPE) { - buf32=(uint32_t*)buf; - for(y=0; y<avctx->height/2; y++){ - luma1=(uint32_t*)&f->data[0][ y*2*f->linesize[0] ]; - luma2=(uint32_t*)&f->data[0][ (y*2+1)*f->linesize[0] ]; - cr=(uint32_t*)&f->data[1][ y*f->linesize[1] ]; - cb=(uint32_t*)&f->data[2][ y*f->linesize[2] ]; - for(x=0; x<avctx->width; x+=8){ - *(luma1++) = *(buf32++); - *(luma1++) = *(buf32++); - *(luma2++) = *(buf32++); - *(luma2++) = *(buf32++); - *(cr++) = *(buf32++); - *(cb++) = *(buf32++); - } - } - } - break; - - case 1: - /* Fraps v1 is an upside-down BGR24 */ - avctx->pix_fmt = PIX_FMT_BGR24; - - if ( (buf_size != avctx->width*avctx->height*3+header_size) && - (buf_size != header_size) ) { - av_log(avctx, AV_LOG_ERROR, - "Invalid frame length %d (should be %d)\n", - buf_size, avctx->width*avctx->height*3+header_size); - return -1; - } - - f->reference = 1; - f->buffer_hints = FF_BUFFER_HINTS_VALID | - FF_BUFFER_HINTS_PRESERVE | - FF_BUFFER_HINTS_REUSABLE; - if (avctx->reget_buffer(avctx, f)) { - av_log(avctx, AV_LOG_ERROR, "reget_buffer() failed\n"); - return -1; - } - /* bit 31 means same as previous pic */ - f->pict_type = (header & (1<<31))? FF_P_TYPE : FF_I_TYPE; - f->key_frame = f->pict_type == FF_I_TYPE; - - if (f->pict_type == FF_I_TYPE) { - for(y=0; y<avctx->height; y++) - memcpy(&f->data[0][ (avctx->height-y)*f->linesize[0] ], - &buf[y*avctx->width*3], - f->linesize[0]); - } - break; - - case 2: - case 4: - /** - * Fraps v2 is Huffman-coded YUV420 planes - * Fraps v4 is virtually the same - */ - avctx->pix_fmt = PIX_FMT_YUV420P; - planes = 3; - f->reference = 1; - f->buffer_hints = FF_BUFFER_HINTS_VALID | - FF_BUFFER_HINTS_PRESERVE | - FF_BUFFER_HINTS_REUSABLE; - if (avctx->reget_buffer(avctx, f)) { - av_log(avctx, AV_LOG_ERROR, "reget_buffer() failed\n"); - return -1; - } - /* skip frame */ - if(buf_size == 8) { - f->pict_type = FF_P_TYPE; - f->key_frame = 0; - break; - } - f->pict_type = FF_I_TYPE; - f->key_frame = 1; - if ((AV_RL32(buf) != FPS_TAG)||(buf_size < (planes*1024 + 24))) { - av_log(avctx, AV_LOG_ERROR, "Fraps: error in data stream\n"); - return -1; - } - for(i = 0; i < planes; i++) { - offs[i] = AV_RL32(buf + 4 + i * 4); - if(offs[i] >= buf_size || (i && offs[i] <= offs[i - 1] + 1024)) { - av_log(avctx, AV_LOG_ERROR, "Fraps: plane %i offset is out of bounds\n", i); - return -1; - } - } - offs[planes] = buf_size; - for(i = 0; i < planes; i++){ - is_chroma = !!i; - s->tmpbuf = av_realloc(s->tmpbuf, offs[i + 1] - offs[i] - 1024 + FF_INPUT_BUFFER_PADDING_SIZE); - if(fraps2_decode_plane(s, f->data[i], f->linesize[i], avctx->width >> is_chroma, - avctx->height >> is_chroma, buf + offs[i], offs[i + 1] - offs[i], is_chroma) < 0) { - av_log(avctx, AV_LOG_ERROR, "Error decoding plane %i\n", i); - return -1; - } - } - break; - } - - *frame = *f; - *data_size = sizeof(AVFrame); - - return buf_size; -} - - -/** - * closes decoder - * @param avctx codec context - * @return 0 on success or negative if fails - */ -static int decode_end(AVCodecContext *avctx) -{ - FrapsContext *s = (FrapsContext*)avctx->priv_data; - - if (s->frame.data[0]) - avctx->release_buffer(avctx, &s->frame); - - av_freep(&s->tmpbuf); - return 0; -} - - -AVCodec fraps_decoder = { - "fraps", - CODEC_TYPE_VIDEO, - CODEC_ID_FRAPS, - sizeof(FrapsContext), - decode_init, - NULL, - decode_end, - decode_frame, - CODEC_CAP_DR1, -}; |