diff options
Diffstat (limited to 'ffmpeg1/libavcodec/avs.c')
| -rw-r--r-- | ffmpeg1/libavcodec/avs.c | 186 |
1 files changed, 0 insertions, 186 deletions
diff --git a/ffmpeg1/libavcodec/avs.c b/ffmpeg1/libavcodec/avs.c deleted file mode 100644 index e3733d7..0000000 --- a/ffmpeg1/libavcodec/avs.c +++ /dev/null @@ -1,186 +0,0 @@ -/* - * AVS video decoder. - * Copyright (c) 2006 Aurelien Jacobs <aurel@gnuage.org> - * - * 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 - */ - -#include "avcodec.h" -#include "get_bits.h" -#include "internal.h" - - -typedef struct { - AVFrame picture; -} AvsContext; - -typedef enum { - AVS_VIDEO = 0x01, - AVS_AUDIO = 0x02, - AVS_PALETTE = 0x03, - AVS_GAME_DATA = 0x04, -} AvsBlockType; - -typedef enum { - AVS_I_FRAME = 0x00, - AVS_P_FRAME_3X3 = 0x01, - AVS_P_FRAME_2X2 = 0x02, - AVS_P_FRAME_2X3 = 0x03, -} AvsVideoSubType; - - -static int -avs_decode_frame(AVCodecContext * avctx, - void *data, int *got_frame, AVPacket *avpkt) -{ - const uint8_t *buf = avpkt->data; - const uint8_t *buf_end = avpkt->data + avpkt->size; - int buf_size = avpkt->size; - AvsContext *const avs = avctx->priv_data; - AVFrame *picture = data; - AVFrame *const p = &avs->picture; - const uint8_t *table, *vect; - uint8_t *out; - int i, j, x, y, stride, ret, vect_w = 3, vect_h = 3; - AvsVideoSubType sub_type; - AvsBlockType type; - GetBitContext change_map = {0}; //init to silence warning - - if ((ret = ff_reget_buffer(avctx, p)) < 0) - return ret; - p->pict_type = AV_PICTURE_TYPE_P; - p->key_frame = 0; - - out = avs->picture.data[0]; - stride = avs->picture.linesize[0]; - - if (buf_end - buf < 4) - return AVERROR_INVALIDDATA; - sub_type = buf[0]; - type = buf[1]; - buf += 4; - - if (type == AVS_PALETTE) { - int first, last; - uint32_t *pal = (uint32_t *) avs->picture.data[1]; - - first = AV_RL16(buf); - last = first + AV_RL16(buf + 2); - if (first >= 256 || last > 256 || buf_end - buf < 4 + 4 + 3 * (last - first)) - return AVERROR_INVALIDDATA; - buf += 4; - for (i=first; i<last; i++, buf+=3) { - pal[i] = (buf[0] << 18) | (buf[1] << 10) | (buf[2] << 2); - pal[i] |= 0xFFU << 24 | (pal[i] >> 6) & 0x30303; - } - - sub_type = buf[0]; - type = buf[1]; - buf += 4; - } - - if (type != AVS_VIDEO) - return AVERROR_INVALIDDATA; - - switch (sub_type) { - case AVS_I_FRAME: - p->pict_type = AV_PICTURE_TYPE_I; - p->key_frame = 1; - case AVS_P_FRAME_3X3: - vect_w = 3; - vect_h = 3; - break; - - case AVS_P_FRAME_2X2: - vect_w = 2; - vect_h = 2; - break; - - case AVS_P_FRAME_2X3: - vect_w = 2; - vect_h = 3; - break; - - default: - return AVERROR_INVALIDDATA; - } - - if (buf_end - buf < 256 * vect_w * vect_h) - return AVERROR_INVALIDDATA; - table = buf + (256 * vect_w * vect_h); - if (sub_type != AVS_I_FRAME) { - int map_size = ((318 / vect_w + 7) / 8) * (198 / vect_h); - if (buf_end - table < map_size) - return AVERROR_INVALIDDATA; - init_get_bits(&change_map, table, map_size * 8); - table += map_size; - } - - for (y=0; y<198; y+=vect_h) { - for (x=0; x<318; x+=vect_w) { - if (sub_type == AVS_I_FRAME || get_bits1(&change_map)) { - if (buf_end - table < 1) - return AVERROR_INVALIDDATA; - vect = &buf[*table++ * (vect_w * vect_h)]; - for (j=0; j<vect_w; j++) { - out[(y + 0) * stride + x + j] = vect[(0 * vect_w) + j]; - out[(y + 1) * stride + x + j] = vect[(1 * vect_w) + j]; - if (vect_h == 3) - out[(y + 2) * stride + x + j] = - vect[(2 * vect_w) + j]; - } - } - } - if (sub_type != AVS_I_FRAME) - align_get_bits(&change_map); - } - - if ((ret = av_frame_ref(picture, &avs->picture)) < 0) - return ret; - *got_frame = 1; - - return buf_size; -} - -static av_cold int avs_decode_init(AVCodecContext * avctx) -{ - AvsContext *s = avctx->priv_data; - avctx->pix_fmt = AV_PIX_FMT_PAL8; - avcodec_set_dimensions(avctx, 318, 198); - avcodec_get_frame_defaults(&s->picture); - return 0; -} - -static av_cold int avs_decode_end(AVCodecContext *avctx) -{ - AvsContext *s = avctx->priv_data; - av_frame_unref(&s->picture); - return 0; -} - - -AVCodec ff_avs_decoder = { - .name = "avs", - .type = AVMEDIA_TYPE_VIDEO, - .id = AV_CODEC_ID_AVS, - .priv_data_size = sizeof(AvsContext), - .init = avs_decode_init, - .decode = avs_decode_frame, - .close = avs_decode_end, - .capabilities = CODEC_CAP_DR1, - .long_name = NULL_IF_CONFIG_SMALL("AVS (Audio Video Standard) video"), -}; |