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Diffstat (limited to 'ffmpeg1/libavcodec/cyuv.c')
| -rw-r--r-- | ffmpeg1/libavcodec/cyuv.c | 202 |
1 files changed, 0 insertions, 202 deletions
diff --git a/ffmpeg1/libavcodec/cyuv.c b/ffmpeg1/libavcodec/cyuv.c deleted file mode 100644 index 3a30138..0000000 --- a/ffmpeg1/libavcodec/cyuv.c +++ /dev/null @@ -1,202 +0,0 @@ -/* - * 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 - * - * 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 - */ - -/** - * @file - * Creative YUV (CYUV) Video Decoder. - */ - -#include <stdio.h> -#include <stdlib.h> -#include <string.h> - -#include "avcodec.h" -#include "internal.h" -#include "libavutil/internal.h" - - -typedef struct CyuvDecodeContext { - AVCodecContext *avctx; - int width, height; -} CyuvDecodeContext; - -static av_cold 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 AVERROR_INVALIDDATA; - s->height = avctx->height; - - return 0; -} - -static int cyuv_decode_frame(AVCodecContext *avctx, - void *data, int *got_frame, - AVPacket *avpkt) -{ - const uint8_t *buf = avpkt->data; - int buf_size = avpkt->size; - CyuvDecodeContext *s=avctx->priv_data; - AVFrame *frame = 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) */ - const signed char *y_table = (const signed char*)buf + 0; - const signed char *u_table = (const signed char*)buf + 16; - const signed char *v_table = (const signed char*)buf + 32; - - unsigned char y_pred, u_pred, v_pred; - int stream_ptr; - unsigned char cur_byte; - int pixel_groups; - int rawsize = s->height * FFALIGN(s->width,2) * 2; - int ret; - - if (avctx->codec_id == AV_CODEC_ID_AURA) { - y_table = u_table; - u_table = v_table; - } - /* 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)) { - avctx->pix_fmt = AV_PIX_FMT_YUV411P; - } else if(buf_size == rawsize ) { - avctx->pix_fmt = AV_PIX_FMT_UYVY422; - } else { - av_log(avctx, AV_LOG_ERROR, "got a buffer with %d bytes when %d were expected\n", - buf_size, 48 + s->height * (s->width * 3 / 4)); - return AVERROR_INVALIDDATA; - } - - /* pixel data starts 48 bytes in, after 3x16-byte tables */ - stream_ptr = 48; - - if ((ret = ff_get_buffer(avctx, frame, 0)) < 0) - return ret; - - y_plane = frame->data[0]; - u_plane = frame->data[1]; - v_plane = frame->data[2]; - - if (buf_size == rawsize) { - int linesize = FFALIGN(s->width,2) * 2; - y_plane += frame->linesize[0] * s->height; - for (stream_ptr = 0; stream_ptr < rawsize; stream_ptr += linesize) { - y_plane -= frame->linesize[0]; - memcpy(y_plane, buf+stream_ptr, linesize); - } - } else { - - /* iterate through each line in the height */ - for (y_ptr = 0, u_ptr = 0, v_ptr = 0; - y_ptr < (s->height * frame->linesize[0]); - y_ptr += frame->linesize[0] - s->width, - u_ptr += frame->linesize[1] - s->width / 4, - v_ptr += 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; - - } - } - } - - *got_frame = 1; - - return buf_size; -} - -#if CONFIG_AURA_DECODER -AVCodec ff_aura_decoder = { - .name = "aura", - .type = AVMEDIA_TYPE_VIDEO, - .id = AV_CODEC_ID_AURA, - .priv_data_size = sizeof(CyuvDecodeContext), - .init = cyuv_decode_init, - .decode = cyuv_decode_frame, - .capabilities = CODEC_CAP_DR1, - .long_name = NULL_IF_CONFIG_SMALL("Auravision AURA"), -}; -#endif - -#if CONFIG_CYUV_DECODER -AVCodec ff_cyuv_decoder = { - .name = "cyuv", - .type = AVMEDIA_TYPE_VIDEO, - .id = AV_CODEC_ID_CYUV, - .priv_data_size = sizeof(CyuvDecodeContext), - .init = cyuv_decode_init, - .decode = cyuv_decode_frame, - .capabilities = CODEC_CAP_DR1, - .long_name = NULL_IF_CONFIG_SMALL("Creative YUV (CYUV)"), -}; -#endif |