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* commit 'b2bed9325dbd6be0da1d91ffed3f513c40274fd2': cosmetics: Group .name and .long_name together in codec/format declarations Conflicts: libavcodec/8svx.c libavcodec/alac.c libavcodec/cljr.c libavcodec/dnxhddec.c libavcodec/dnxhdenc.c libavcodec/dpxenc.c libavcodec/dvdec.c libavcodec/dvdsubdec.c libavcodec/dvdsubenc.c libavcodec/ffv1dec.c libavcodec/flacdec.c libavcodec/flvdec.c libavcodec/fraps.c libavcodec/frwu.c libavcodec/g726.c libavcodec/gif.c libavcodec/gifdec.c libavcodec/h261dec.c libavcodec/h263dec.c libavcodec/iff.c libavcodec/imc.c libavcodec/libopencore-amr.c libavcodec/libopenjpegdec.c libavcodec/libopenjpegenc.c libavcodec/libspeexenc.c libavcodec/libvo-amrwbenc.c libavcodec/libvorbisenc.c libavcodec/libvpxenc.c libavcodec/libx264.c libavcodec/libxavs.c libavcodec/libxvid.c libavcodec/ljpegenc.c libavcodec/mjpegbdec.c libavcodec/mjpegdec.c libavcodec/mpeg12dec.c libavcodec/mpeg4videodec.c libavcodec/msmpeg4dec.c libavcodec/pgssubdec.c libavcodec/pngdec.c libavcodec/pngenc.c libavcodec/proresdec_lgpl.c libavcodec/proresenc_kostya.c libavcodec/ra144enc.c libavcodec/rawdec.c libavcodec/rv10.c libavcodec/sp5xdec.c libavcodec/takdec.c libavcodec/tta.c libavcodec/v210dec.c libavcodec/vp6.c libavcodec/wavpack.c libavcodec/xbmenc.c libavcodec/yop.c Merged-by: Michael Niedermayer <michaelni@gmx.at>
163 lines
5.2 KiB
C
163 lines
5.2 KiB
C
/*
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* Bethesda VID video decoder
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* Copyright (C) 2007 Nicholas Tung
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*
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* This file is part of FFmpeg.
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*
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* FFmpeg is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* FFmpeg is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with FFmpeg; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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/**
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* @file
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* @brief Bethesda Softworks VID Video Decoder
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* @author Nicholas Tung [ntung (at. ntung com] (2007-03)
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* @see http://wiki.multimedia.cx/index.php?title=Bethsoft_VID
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* @see http://www.svatopluk.com/andux/docs/dfvid.html
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*/
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#include "libavutil/common.h"
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#include "avcodec.h"
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#include "bethsoftvideo.h"
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#include "bytestream.h"
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#include "internal.h"
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typedef struct BethsoftvidContext {
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AVFrame frame;
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GetByteContext g;
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} BethsoftvidContext;
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static av_cold int bethsoftvid_decode_init(AVCodecContext *avctx)
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{
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BethsoftvidContext *vid = avctx->priv_data;
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avcodec_get_frame_defaults(&vid->frame);
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avctx->pix_fmt = AV_PIX_FMT_PAL8;
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return 0;
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}
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static int set_palette(BethsoftvidContext *ctx)
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{
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uint32_t *palette = (uint32_t *)ctx->frame.data[1];
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int a;
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if (bytestream2_get_bytes_left(&ctx->g) < 256*3)
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return AVERROR_INVALIDDATA;
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for(a = 0; a < 256; a++){
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palette[a] = 0xFFU << 24 | bytestream2_get_be24u(&ctx->g) * 4;
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palette[a] |= palette[a] >> 6 & 0x30303;
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}
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ctx->frame.palette_has_changed = 1;
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return 0;
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}
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static int bethsoftvid_decode_frame(AVCodecContext *avctx,
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void *data, int *got_frame,
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AVPacket *avpkt)
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{
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BethsoftvidContext * vid = avctx->priv_data;
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char block_type;
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uint8_t * dst;
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uint8_t * frame_end;
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int remaining = avctx->width; // number of bytes remaining on a line
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int wrap_to_next_line;
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int code, ret;
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int yoffset;
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if ((ret = ff_reget_buffer(avctx, &vid->frame)) < 0)
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return ret;
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wrap_to_next_line = vid->frame.linesize[0] - avctx->width;
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if (avpkt->side_data_elems > 0 &&
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avpkt->side_data[0].type == AV_PKT_DATA_PALETTE) {
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bytestream2_init(&vid->g, avpkt->side_data[0].data,
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avpkt->side_data[0].size);
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if ((ret = set_palette(vid)) < 0)
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return ret;
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}
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bytestream2_init(&vid->g, avpkt->data, avpkt->size);
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dst = vid->frame.data[0];
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frame_end = vid->frame.data[0] + vid->frame.linesize[0] * avctx->height;
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switch(block_type = bytestream2_get_byte(&vid->g)){
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case PALETTE_BLOCK: {
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*got_frame = 0;
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if ((ret = set_palette(vid)) < 0) {
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av_log(avctx, AV_LOG_ERROR, "error reading palette\n");
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return ret;
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}
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return bytestream2_tell(&vid->g);
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}
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case VIDEO_YOFF_P_FRAME:
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yoffset = bytestream2_get_le16(&vid->g);
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if(yoffset >= avctx->height)
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return AVERROR_INVALIDDATA;
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dst += vid->frame.linesize[0] * yoffset;
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}
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// main code
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while((code = bytestream2_get_byte(&vid->g))){
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int length = code & 0x7f;
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// copy any bytes starting at the current position, and ending at the frame width
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while(length > remaining){
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if(code < 0x80)
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bytestream2_get_buffer(&vid->g, dst, remaining);
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else if(block_type == VIDEO_I_FRAME)
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memset(dst, bytestream2_peek_byte(&vid->g), remaining);
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length -= remaining; // decrement the number of bytes to be copied
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dst += remaining + wrap_to_next_line; // skip over extra bytes at end of frame
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remaining = avctx->width;
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if(dst == frame_end)
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goto end;
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}
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// copy any remaining bytes after / if line overflows
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if(code < 0x80)
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bytestream2_get_buffer(&vid->g, dst, length);
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else if(block_type == VIDEO_I_FRAME)
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memset(dst, bytestream2_get_byte(&vid->g), length);
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remaining -= length;
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dst += length;
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}
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end:
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if ((ret = av_frame_ref(data, &vid->frame)) < 0)
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return ret;
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*got_frame = 1;
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return avpkt->size;
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}
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static av_cold int bethsoftvid_decode_end(AVCodecContext *avctx)
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{
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BethsoftvidContext * vid = avctx->priv_data;
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av_frame_unref(&vid->frame);
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return 0;
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}
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AVCodec ff_bethsoftvid_decoder = {
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.name = "bethsoftvid",
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.long_name = NULL_IF_CONFIG_SMALL("Bethesda VID video"),
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.type = AVMEDIA_TYPE_VIDEO,
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.id = AV_CODEC_ID_BETHSOFTVID,
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.priv_data_size = sizeof(BethsoftvidContext),
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.init = bethsoftvid_decode_init,
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.close = bethsoftvid_decode_end,
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.decode = bethsoftvid_decode_frame,
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.capabilities = CODEC_CAP_DR1,
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};
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