diff options
Diffstat (limited to 'ffmpeg/libavcodec/vcr1.c')
| -rw-r--r-- | ffmpeg/libavcodec/vcr1.c | 133 |
1 files changed, 0 insertions, 133 deletions
diff --git a/ffmpeg/libavcodec/vcr1.c b/ffmpeg/libavcodec/vcr1.c deleted file mode 100644 index f8281ea..0000000 --- a/ffmpeg/libavcodec/vcr1.c +++ /dev/null @@ -1,133 +0,0 @@ -/* - * ATI VCR1 codec - * Copyright (c) 2003 Michael Niedermayer - * - * 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 - * ATI VCR1 codec - */ - -#include "avcodec.h" -#include "internal.h" -#include "libavutil/avassert.h" -#include "libavutil/internal.h" - -typedef struct VCR1Context { - int delta[16]; - int offset[4]; -} VCR1Context; - -static av_cold int vcr1_decode_init(AVCodecContext *avctx) -{ - avctx->pix_fmt = AV_PIX_FMT_YUV410P; - - if (avctx->width % 8 || avctx->height%4) { - avpriv_request_sample(avctx, "odd dimensions (%d x %d) support", avctx->width, avctx->height); - return AVERROR_INVALIDDATA; - } - - return 0; -} - -static int vcr1_decode_frame(AVCodecContext *avctx, void *data, - int *got_frame, AVPacket *avpkt) -{ - VCR1Context *const a = avctx->priv_data; - AVFrame *const p = data; - const uint8_t *bytestream = avpkt->data; - const uint8_t *bytestream_end = bytestream + avpkt->size; - int i, x, y, ret; - - if(avpkt->size < 32 + avctx->height + avctx->width*avctx->height*5/8){ - av_log(avctx, AV_LOG_ERROR, "Insufficient input data. %d < %d\n", avpkt->size , 32 + avctx->height + avctx->width*avctx->height*5/8); - return AVERROR(EINVAL); - } - - if ((ret = ff_get_buffer(avctx, p, 0)) < 0) - return ret; - p->pict_type = AV_PICTURE_TYPE_I; - p->key_frame = 1; - - for (i = 0; i < 16; i++) { - a->delta[i] = *bytestream++; - bytestream++; - } - - for (y = 0; y < avctx->height; y++) { - int offset; - uint8_t *luma = &p->data[0][y * p->linesize[0]]; - - if ((y & 3) == 0) { - uint8_t *cb = &p->data[1][(y >> 2) * p->linesize[1]]; - uint8_t *cr = &p->data[2][(y >> 2) * p->linesize[2]]; - - av_assert0 (bytestream_end - bytestream >= 4 + avctx->width); - - for (i = 0; i < 4; i++) - a->offset[i] = *bytestream++; - - offset = a->offset[0] - a->delta[bytestream[2] & 0xF]; - for (x = 0; x < avctx->width; x += 4) { - luma[0] = offset += a->delta[bytestream[2] & 0xF]; - luma[1] = offset += a->delta[bytestream[2] >> 4]; - luma[2] = offset += a->delta[bytestream[0] & 0xF]; - luma[3] = offset += a->delta[bytestream[0] >> 4]; - luma += 4; - - *cb++ = bytestream[3]; - *cr++ = bytestream[1]; - - bytestream += 4; - } - } else { - av_assert0 (bytestream_end - bytestream >= avctx->width / 2); - - offset = a->offset[y & 3] - a->delta[bytestream[2] & 0xF]; - - for (x = 0; x < avctx->width; x += 8) { - luma[0] = offset += a->delta[bytestream[2] & 0xF]; - luma[1] = offset += a->delta[bytestream[2] >> 4]; - luma[2] = offset += a->delta[bytestream[3] & 0xF]; - luma[3] = offset += a->delta[bytestream[3] >> 4]; - luma[4] = offset += a->delta[bytestream[0] & 0xF]; - luma[5] = offset += a->delta[bytestream[0] >> 4]; - luma[6] = offset += a->delta[bytestream[1] & 0xF]; - luma[7] = offset += a->delta[bytestream[1] >> 4]; - luma += 8; - bytestream += 4; - } - } - } - - *got_frame = 1; - - return bytestream - avpkt->data; -} - -AVCodec ff_vcr1_decoder = { - .name = "vcr1", - .long_name = NULL_IF_CONFIG_SMALL("ATI VCR1"), - .type = AVMEDIA_TYPE_VIDEO, - .id = AV_CODEC_ID_VCR1, - .priv_data_size = sizeof(VCR1Context), - .init = vcr1_decode_init, - .decode = vcr1_decode_frame, - .capabilities = CODEC_CAP_DR1, -}; |