diff options
Diffstat (limited to 'src/libffmpeg/libavcodec/cyuv.c')
| -rw-r--r-- | src/libffmpeg/libavcodec/cyuv.c | 190 |
1 files changed, 0 insertions, 190 deletions
diff --git a/src/libffmpeg/libavcodec/cyuv.c b/src/libffmpeg/libavcodec/cyuv.c deleted file mode 100644 index 101f2bd85..000000000 --- a/src/libffmpeg/libavcodec/cyuv.c +++ /dev/null @@ -1,190 +0,0 @@ -/* - * - * Copyright (C) 2003 the ffmpeg project - * - * 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 - * - * Creative YUV (CYUV) Video Decoder - * by Mike Melanson (melanson@pcisys.net) - * based on "Creative YUV (CYUV) stream format for AVI": - * http://www.csse.monash.edu.au/~timf/videocodec/cyuv.txt - * - */ - -/** - * @file cyuv.c - * Creative YUV (CYUV) Video Decoder. - */ - -#include <stdio.h> -#include <stdlib.h> -#include <string.h> -#include <unistd.h> - -#include "common.h" -#include "avcodec.h" -#include "dsputil.h" -#include "mpegvideo.h" - - -typedef struct CyuvDecodeContext { - AVCodecContext *avctx; - int width, height; - AVFrame frame; -} CyuvDecodeContext; - -static int cyuv_decode_init(AVCodecContext *avctx) -{ - CyuvDecodeContext *s = avctx->priv_data; - - s->avctx = avctx; - s->width = avctx->width; - /* width needs to be divisible by 4 for this codec to work */ - if (s->width & 0x3) - return -1; - s->height = avctx->height; - avctx->pix_fmt = PIX_FMT_YUV411P; - avctx->has_b_frames = 0; - - return 0; -} - -static int cyuv_decode_frame(AVCodecContext *avctx, - void *data, int *data_size, - uint8_t *buf, int buf_size) -{ - CyuvDecodeContext *s=avctx->priv_data; - - unsigned char *y_plane; - unsigned char *u_plane; - unsigned char *v_plane; - int y_ptr; - int u_ptr; - int v_ptr; - - /* prediction error tables (make it clear that they are signed values) */ - signed char *y_table = (signed char*)buf + 0; - signed char *u_table = (signed char*)buf + 16; - signed char *v_table = (signed char*)buf + 32; - - unsigned char y_pred, u_pred, v_pred; - int stream_ptr; - unsigned char cur_byte; - int pixel_groups; - - /* sanity check the buffer size: A buffer has 3x16-bytes tables - * followed by (height) lines each with 3 bytes to represent groups - * of 4 pixels. Thus, the total size of the buffer ought to be: - * (3 * 16) + height * (width * 3 / 4) */ - if (buf_size != 48 + s->height * (s->width * 3 / 4)) { - av_log(avctx, AV_LOG_ERROR, "ffmpeg: cyuv: got a buffer with %d bytes when %d were expected\n", - buf_size, - 48 + s->height * (s->width * 3 / 4)); - return -1; - } - - /* pixel data starts 48 bytes in, after 3x16-byte tables */ - stream_ptr = 48; - - if(s->frame.data[0]) - avctx->release_buffer(avctx, &s->frame); - - s->frame.buffer_hints = FF_BUFFER_HINTS_VALID; - s->frame.reference = 0; - if(avctx->get_buffer(avctx, &s->frame) < 0) { - av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n"); - return -1; - } - - y_plane = s->frame.data[0]; - u_plane = s->frame.data[1]; - v_plane = s->frame.data[2]; - - /* iterate through each line in the height */ - for (y_ptr = 0, u_ptr = 0, v_ptr = 0; - y_ptr < (s->height * s->frame.linesize[0]); - y_ptr += s->frame.linesize[0] - s->width, - u_ptr += s->frame.linesize[1] - s->width / 4, - v_ptr += s->frame.linesize[2] - s->width / 4) { - - /* reset predictors */ - cur_byte = buf[stream_ptr++]; - u_plane[u_ptr++] = u_pred = cur_byte & 0xF0; - y_plane[y_ptr++] = y_pred = (cur_byte & 0x0F) << 4; - - cur_byte = buf[stream_ptr++]; - v_plane[v_ptr++] = v_pred = cur_byte & 0xF0; - y_pred += y_table[cur_byte & 0x0F]; - y_plane[y_ptr++] = y_pred; - - cur_byte = buf[stream_ptr++]; - y_pred += y_table[cur_byte & 0x0F]; - y_plane[y_ptr++] = y_pred; - y_pred += y_table[(cur_byte & 0xF0) >> 4]; - y_plane[y_ptr++] = y_pred; - - /* iterate through the remaining pixel groups (4 pixels/group) */ - pixel_groups = s->width / 4 - 1; - while (pixel_groups--) { - - cur_byte = buf[stream_ptr++]; - u_pred += u_table[(cur_byte & 0xF0) >> 4]; - u_plane[u_ptr++] = u_pred; - y_pred += y_table[cur_byte & 0x0F]; - y_plane[y_ptr++] = y_pred; - - cur_byte = buf[stream_ptr++]; - v_pred += v_table[(cur_byte & 0xF0) >> 4]; - v_plane[v_ptr++] = v_pred; - y_pred += y_table[cur_byte & 0x0F]; - y_plane[y_ptr++] = y_pred; - - cur_byte = buf[stream_ptr++]; - y_pred += y_table[cur_byte & 0x0F]; - y_plane[y_ptr++] = y_pred; - y_pred += y_table[(cur_byte & 0xF0) >> 4]; - y_plane[y_ptr++] = y_pred; - - } - } - - *data_size=sizeof(AVFrame); - *(AVFrame*)data= s->frame; - - return buf_size; -} - -static int cyuv_decode_end(AVCodecContext *avctx) -{ -/* CyuvDecodeContext *s = avctx->priv_data;*/ - - return 0; -} - -AVCodec cyuv_decoder = { - "cyuv", - CODEC_TYPE_VIDEO, - CODEC_ID_CYUV, - sizeof(CyuvDecodeContext), - cyuv_decode_init, - NULL, - cyuv_decode_end, - cyuv_decode_frame, - CODEC_CAP_DR1, - NULL -}; - |