diff options
Diffstat (limited to 'ffmpeg/libavcodec/jvdec.c')
| -rw-r--r-- | ffmpeg/libavcodec/jvdec.c | 224 |
1 files changed, 0 insertions, 224 deletions
diff --git a/ffmpeg/libavcodec/jvdec.c b/ffmpeg/libavcodec/jvdec.c deleted file mode 100644 index cad0532..0000000 --- a/ffmpeg/libavcodec/jvdec.c +++ /dev/null @@ -1,224 +0,0 @@ -/* - * Bitmap Brothers JV video decoder - * Copyright (c) 2011 Peter Ross <pross@xvid.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 - */ - -/** - * @file - * Bitmap Brothers JV video decoder - * @author Peter Ross <pross@xvid.org> - */ - -#include "avcodec.h" -#include "dsputil.h" -#include "get_bits.h" -#include "internal.h" -#include "libavutil/intreadwrite.h" - -typedef struct JvContext { - DSPContext dsp; - AVFrame *frame; - uint32_t palette[AVPALETTE_COUNT]; - int palette_has_changed; -} JvContext; - -static av_cold int decode_init(AVCodecContext *avctx) -{ - JvContext *s = avctx->priv_data; - - s->frame = av_frame_alloc(); - if (!s->frame) - return AVERROR(ENOMEM); - - avctx->pix_fmt = AV_PIX_FMT_PAL8; - ff_dsputil_init(&s->dsp, avctx); - return 0; -} - -/** - * Decode 2x2 block - */ -static inline void decode2x2(GetBitContext *gb, uint8_t *dst, int linesize) -{ - int i, j, v[2]; - - switch (get_bits(gb, 2)) { - case 1: - v[0] = get_bits(gb, 8); - for (j = 0; j < 2; j++) - memset(dst + j*linesize, v[0], 2); - break; - case 2: - v[0] = get_bits(gb, 8); - v[1] = get_bits(gb, 8); - for (j = 0; j < 2; j++) - for (i = 0; i < 2; i++) - dst[j*linesize + i] = v[get_bits1(gb)]; - break; - case 3: - for (j = 0; j < 2; j++) - for (i = 0; i < 2; i++) - dst[j*linesize + i] = get_bits(gb, 8); - } -} - -/** - * Decode 4x4 block - */ -static inline void decode4x4(GetBitContext *gb, uint8_t *dst, int linesize) -{ - int i, j, v[2]; - - switch (get_bits(gb, 2)) { - case 1: - v[0] = get_bits(gb, 8); - for (j = 0; j < 4; j++) - memset(dst + j*linesize, v[0], 4); - break; - case 2: - v[0] = get_bits(gb, 8); - v[1] = get_bits(gb, 8); - for (j = 2; j >= 0; j -= 2) { - for (i = 0; i < 4; i++) - dst[j*linesize + i] = v[get_bits1(gb)]; - for (i = 0; i < 4; i++) - dst[(j+1)*linesize + i] = v[get_bits1(gb)]; - } - break; - case 3: - for (j = 0; j < 4; j += 2) - for (i = 0; i < 4; i += 2) - decode2x2(gb, dst + j*linesize + i, linesize); - } -} - -/** - * Decode 8x8 block - */ -static inline void decode8x8(GetBitContext *gb, uint8_t *dst, int linesize, DSPContext *dsp) -{ - int i, j, v[2]; - - switch (get_bits(gb, 2)) { - case 1: - v[0] = get_bits(gb, 8); - dsp->fill_block_tab[1](dst, v[0], linesize, 8); - break; - case 2: - v[0] = get_bits(gb, 8); - v[1] = get_bits(gb, 8); - for (j = 7; j >= 0; j--) - for (i = 0; i < 8; i++) - dst[j*linesize + i] = v[get_bits1(gb)]; - break; - case 3: - for (j = 0; j < 8; j += 4) - for (i = 0; i < 8; i += 4) - decode4x4(gb, dst + j*linesize + i, linesize); - } -} - -static int decode_frame(AVCodecContext *avctx, - void *data, int *got_frame, - AVPacket *avpkt) -{ - JvContext *s = avctx->priv_data; - const uint8_t *buf = avpkt->data; - const uint8_t *buf_end = buf + avpkt->size; - int video_size, video_type, i, j, ret; - - if (avpkt->size < 6) - return AVERROR_INVALIDDATA; - - video_size = AV_RL32(buf); - video_type = buf[4]; - buf += 5; - - if (video_size) { - if (video_size < 0 || video_size > avpkt->size - 5) { - av_log(avctx, AV_LOG_ERROR, "video size %d invalid\n", video_size); - return AVERROR_INVALIDDATA; - } - if ((ret = ff_reget_buffer(avctx, s->frame)) < 0) - return ret; - - if (video_type == 0 || video_type == 1) { - GetBitContext gb; - init_get_bits(&gb, buf, 8 * video_size); - - for (j = 0; j < avctx->height; j += 8) - for (i = 0; i < avctx->width; i += 8) - decode8x8(&gb, s->frame->data[0] + j * s->frame->linesize[0] + i, - s->frame->linesize[0], &s->dsp); - - buf += video_size; - } else if (video_type == 2) { - int v = *buf++; - for (j = 0; j < avctx->height; j++) - memset(s->frame->data[0] + j * s->frame->linesize[0], v, avctx->width); - } else { - av_log(avctx, AV_LOG_WARNING, "unsupported frame type %i\n", video_type); - return AVERROR_INVALIDDATA; - } - } - - if (buf_end - buf >= AVPALETTE_COUNT * 3) { - for (i = 0; i < AVPALETTE_COUNT; i++) { - uint32_t pal = AV_RB24(buf); - s->palette[i] = 0xFFU << 24 | pal << 2 | ((pal >> 4) & 0x30303); - buf += 3; - } - s->palette_has_changed = 1; - } - - if (video_size) { - s->frame->key_frame = 1; - s->frame->pict_type = AV_PICTURE_TYPE_I; - s->frame->palette_has_changed = s->palette_has_changed; - s->palette_has_changed = 0; - memcpy(s->frame->data[1], s->palette, AVPALETTE_SIZE); - - if ((ret = av_frame_ref(data, s->frame)) < 0) - return ret; - *got_frame = 1; - } - - return avpkt->size; -} - -static av_cold int decode_close(AVCodecContext *avctx) -{ - JvContext *s = avctx->priv_data; - - av_frame_free(&s->frame); - - return 0; -} - -AVCodec ff_jv_decoder = { - .name = "jv", - .long_name = NULL_IF_CONFIG_SMALL("Bitmap Brothers JV video"), - .type = AVMEDIA_TYPE_VIDEO, - .id = AV_CODEC_ID_JV, - .priv_data_size = sizeof(JvContext), - .init = decode_init, - .close = decode_close, - .decode = decode_frame, - .capabilities = CODEC_CAP_DR1, -}; |