diff options
Diffstat (limited to 'ffmpeg1/libavcodec/msrle.c')
| -rw-r--r-- | ffmpeg1/libavcodec/msrle.c | 164 |
1 files changed, 0 insertions, 164 deletions
diff --git a/ffmpeg1/libavcodec/msrle.c b/ffmpeg1/libavcodec/msrle.c deleted file mode 100644 index 674e586..0000000 --- a/ffmpeg1/libavcodec/msrle.c +++ /dev/null @@ -1,164 +0,0 @@ -/* - * Microsoft RLE video decoder - * 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 - * MS RLE video decoder by Mike Melanson (melanson@pcisys.net) - * For more information about the MS RLE format, visit: - * http://www.pcisys.net/~melanson/codecs/ - * - * The MS RLE decoder outputs PAL8 colorspace data. - */ - -#include <stdio.h> -#include <stdlib.h> -#include <string.h> - -#include "avcodec.h" -#include "internal.h" -#include "msrledec.h" - -typedef struct MsrleContext { - AVCodecContext *avctx; - AVFrame frame; - - GetByteContext gb; - const unsigned char *buf; - int size; - - uint32_t pal[256]; -} MsrleContext; - -static av_cold int msrle_decode_init(AVCodecContext *avctx) -{ - MsrleContext *s = avctx->priv_data; - int i; - - s->avctx = avctx; - - switch (avctx->bits_per_coded_sample) { - case 1: - avctx->pix_fmt = AV_PIX_FMT_MONOWHITE; - break; - case 4: - case 8: - avctx->pix_fmt = AV_PIX_FMT_PAL8; - break; - case 24: - avctx->pix_fmt = AV_PIX_FMT_BGR24; - break; - default: - av_log(avctx, AV_LOG_ERROR, "unsupported bits per sample\n"); - return AVERROR_INVALIDDATA; - } - - avcodec_get_frame_defaults(&s->frame); - - if (avctx->extradata_size >= 4) - for (i = 0; i < FFMIN(avctx->extradata_size, AVPALETTE_SIZE)/4; i++) - s->pal[i] = 0xFFU<<24 | AV_RL32(avctx->extradata+4*i); - - return 0; -} - -static int msrle_decode_frame(AVCodecContext *avctx, - void *data, int *got_frame, - AVPacket *avpkt) -{ - const uint8_t *buf = avpkt->data; - int buf_size = avpkt->size; - MsrleContext *s = avctx->priv_data; - int istride = FFALIGN(avctx->width*avctx->bits_per_coded_sample, 32) / 8; - int ret; - - s->buf = buf; - s->size = buf_size; - - if ((ret = ff_reget_buffer(avctx, &s->frame)) < 0) - return ret; - - if (avctx->bits_per_coded_sample > 1 && avctx->bits_per_coded_sample <= 8) { - const uint8_t *pal = av_packet_get_side_data(avpkt, AV_PKT_DATA_PALETTE, NULL); - - if (pal) { - s->frame.palette_has_changed = 1; - memcpy(s->pal, pal, AVPALETTE_SIZE); - } - /* make the palette available */ - memcpy(s->frame.data[1], s->pal, AVPALETTE_SIZE); - } - - /* FIXME how to correctly detect RLE ??? */ - if (avctx->height * istride == avpkt->size) { /* assume uncompressed */ - int linesize = (avctx->width * avctx->bits_per_coded_sample + 7) / 8; - uint8_t *ptr = s->frame.data[0]; - uint8_t *buf = avpkt->data + (avctx->height-1)*istride; - int i, j; - - for (i = 0; i < avctx->height; i++) { - if (avctx->bits_per_coded_sample == 4) { - for (j = 0; j < avctx->width - 1; j += 2) { - ptr[j+0] = buf[j>>1] >> 4; - ptr[j+1] = buf[j>>1] & 0xF; - } - if (avctx->width & 1) - ptr[j+0] = buf[j>>1] >> 4; - } else { - memcpy(ptr, buf, linesize); - } - buf -= istride; - ptr += s->frame.linesize[0]; - } - } else { - bytestream2_init(&s->gb, buf, buf_size); - ff_msrle_decode(avctx, (AVPicture*)&s->frame, avctx->bits_per_coded_sample, &s->gb); - } - - if ((ret = av_frame_ref(data, &s->frame)) < 0) - return ret; - - *got_frame = 1; - - /* report that the buffer was completely consumed */ - return buf_size; -} - -static av_cold int msrle_decode_end(AVCodecContext *avctx) -{ - MsrleContext *s = avctx->priv_data; - - /* release the last frame */ - av_frame_unref(&s->frame); - - return 0; -} - -AVCodec ff_msrle_decoder = { - .name = "msrle", - .type = AVMEDIA_TYPE_VIDEO, - .id = AV_CODEC_ID_MSRLE, - .priv_data_size = sizeof(MsrleContext), - .init = msrle_decode_init, - .close = msrle_decode_end, - .decode = msrle_decode_frame, - .capabilities = CODEC_CAP_DR1, - .long_name = NULL_IF_CONFIG_SMALL("Microsoft RLE"), -}; |