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Diffstat (limited to 'src/libffmpeg/libavcodec/msrle.c')
-rw-r--r--src/libffmpeg/libavcodec/msrle.c309
1 files changed, 0 insertions, 309 deletions
diff --git a/src/libffmpeg/libavcodec/msrle.c b/src/libffmpeg/libavcodec/msrle.c
deleted file mode 100644
index fae5616e5..000000000
--- a/src/libffmpeg/libavcodec/msrle.c
+++ /dev/null
@@ -1,309 +0,0 @@
-/*
- * Micrsoft 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 msrle.c
- * 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.
- *
- * Note that this decoder expects the palette colors from the end of the
- * BITMAPINFO header passed through palctrl.
- */
-
-#include <stdio.h>
-#include <stdlib.h>
-#include <string.h>
-#include <unistd.h>
-
-#include "common.h"
-#include "avcodec.h"
-#include "dsputil.h"
-
-typedef struct MsrleContext {
- AVCodecContext *avctx;
- AVFrame frame;
-
- unsigned char *buf;
- int size;
-
-} MsrleContext;
-
-#define FETCH_NEXT_STREAM_BYTE() \
- if (stream_ptr >= s->size) \
- { \
- av_log(s->avctx, AV_LOG_ERROR, " MS RLE: stream ptr just went out of bounds (1)\n"); \
- return; \
- } \
- stream_byte = s->buf[stream_ptr++];
-
-static void msrle_decode_pal4(MsrleContext *s)
-{
- int stream_ptr = 0;
- unsigned char rle_code;
- unsigned char extra_byte, odd_pixel;
- unsigned char stream_byte;
- int pixel_ptr = 0;
- int row_dec = s->frame.linesize[0];
- int row_ptr = (s->avctx->height - 1) * row_dec;
- int frame_size = row_dec * s->avctx->height;
- int i;
-
- /* make the palette available */
- memcpy(s->frame.data[1], s->avctx->palctrl->palette, AVPALETTE_SIZE);
- if (s->avctx->palctrl->palette_changed) {
- s->frame.palette_has_changed = 1;
- s->avctx->palctrl->palette_changed = 0;
- }
-
- while (row_ptr >= 0) {
- FETCH_NEXT_STREAM_BYTE();
- rle_code = stream_byte;
- if (rle_code == 0) {
- /* fetch the next byte to see how to handle escape code */
- FETCH_NEXT_STREAM_BYTE();
- if (stream_byte == 0) {
- /* line is done, goto the next one */
- row_ptr -= row_dec;
- pixel_ptr = 0;
- } else if (stream_byte == 1) {
- /* decode is done */
- return;
- } else if (stream_byte == 2) {
- /* reposition frame decode coordinates */
- FETCH_NEXT_STREAM_BYTE();
- pixel_ptr += stream_byte;
- FETCH_NEXT_STREAM_BYTE();
- row_ptr -= stream_byte * row_dec;
- } else {
- // copy pixels from encoded stream
- odd_pixel = stream_byte & 1;
- rle_code = (stream_byte + 1) / 2;
- extra_byte = rle_code & 0x01;
- if ((row_ptr + pixel_ptr + stream_byte > frame_size) ||
- (row_ptr < 0)) {
- av_log(s->avctx, AV_LOG_ERROR, " MS RLE: frame ptr just went out of bounds (1)\n");
- return;
- }
-
- for (i = 0; i < rle_code; i++) {
- if (pixel_ptr >= s->avctx->width)
- break;
- FETCH_NEXT_STREAM_BYTE();
- s->frame.data[0][row_ptr + pixel_ptr] = stream_byte >> 4;
- pixel_ptr++;
- if (i + 1 == rle_code && odd_pixel)
- break;
- if (pixel_ptr >= s->avctx->width)
- break;
- s->frame.data[0][row_ptr + pixel_ptr] = stream_byte & 0x0F;
- pixel_ptr++;
- }
-
- // if the RLE code is odd, skip a byte in the stream
- if (extra_byte)
- stream_ptr++;
- }
- } else {
- // decode a run of data
- if ((row_ptr + pixel_ptr + stream_byte > frame_size) ||
- (row_ptr < 0)) {
- av_log(s->avctx, AV_LOG_ERROR, " MS RLE: frame ptr just went out of bounds (1)\n");
- return;
- }
- FETCH_NEXT_STREAM_BYTE();
- for (i = 0; i < rle_code; i++) {
- if (pixel_ptr >= s->avctx->width)
- break;
- if ((i & 1) == 0)
- s->frame.data[0][row_ptr + pixel_ptr] = stream_byte >> 4;
- else
- s->frame.data[0][row_ptr + pixel_ptr] = stream_byte & 0x0F;
- pixel_ptr++;
- }
- }
- }
-
- /* one last sanity check on the way out */
- if (stream_ptr < s->size)
- av_log(s->avctx, AV_LOG_ERROR, " MS RLE: ended frame decode with bytes left over (%d < %d)\n",
- stream_ptr, s->size);
-}
-
-
-
-static void msrle_decode_pal8(MsrleContext *s)
-{
- int stream_ptr = 0;
- unsigned char rle_code;
- unsigned char extra_byte;
- unsigned char stream_byte;
- int pixel_ptr = 0;
- int row_dec = s->frame.linesize[0];
- int row_ptr = (s->avctx->height - 1) * row_dec;
- int frame_size = row_dec * s->avctx->height;
-
- /* make the palette available */
- memcpy(s->frame.data[1], s->avctx->palctrl->palette, AVPALETTE_SIZE);
- if (s->avctx->palctrl->palette_changed) {
- s->frame.palette_has_changed = 1;
- s->avctx->palctrl->palette_changed = 0;
- }
-
- while (row_ptr >= 0) {
- FETCH_NEXT_STREAM_BYTE();
- rle_code = stream_byte;
- if (rle_code == 0) {
- /* fetch the next byte to see how to handle escape code */
- FETCH_NEXT_STREAM_BYTE();
- if (stream_byte == 0) {
- /* line is done, goto the next one */
- row_ptr -= row_dec;
- pixel_ptr = 0;
- } else if (stream_byte == 1) {
- /* decode is done */
- return;
- } else if (stream_byte == 2) {
- /* reposition frame decode coordinates */
- FETCH_NEXT_STREAM_BYTE();
- pixel_ptr += stream_byte;
- FETCH_NEXT_STREAM_BYTE();
- row_ptr -= stream_byte * row_dec;
- } else {
- /* copy pixels from encoded stream */
- if ((row_ptr + pixel_ptr + stream_byte > frame_size) ||
- (row_ptr < 0)) {
- av_log(s->avctx, AV_LOG_ERROR, " MS RLE: frame ptr just went out of bounds (1)\n");
- return;
- }
-
- rle_code = stream_byte;
- extra_byte = stream_byte & 0x01;
- if (stream_ptr + rle_code + extra_byte > s->size) {
- av_log(s->avctx, AV_LOG_ERROR, " MS RLE: stream ptr just went out of bounds (2)\n");
- return;
- }
-
- while (rle_code--) {
- FETCH_NEXT_STREAM_BYTE();
- s->frame.data[0][row_ptr + pixel_ptr] = stream_byte;
- pixel_ptr++;
- }
-
- /* if the RLE code is odd, skip a byte in the stream */
- if (extra_byte)
- stream_ptr++;
- }
- } else {
- /* decode a run of data */
- if ((row_ptr + pixel_ptr + stream_byte > frame_size) ||
- (row_ptr < 0)) {
- av_log(s->avctx, AV_LOG_ERROR, " MS RLE: frame ptr just went out of bounds (2)\n");
- return;
- }
-
- FETCH_NEXT_STREAM_BYTE();
-
- while(rle_code--) {
- s->frame.data[0][row_ptr + pixel_ptr] = stream_byte;
- pixel_ptr++;
- }
- }
- }
-
- /* one last sanity check on the way out */
- if (stream_ptr < s->size)
- av_log(s->avctx, AV_LOG_ERROR, " MS RLE: ended frame decode with bytes left over (%d < %d)\n",
- stream_ptr, s->size);
-}
-
-static int msrle_decode_init(AVCodecContext *avctx)
-{
- MsrleContext *s = (MsrleContext *)avctx->priv_data;
-
- s->avctx = avctx;
-
- avctx->pix_fmt = PIX_FMT_PAL8;
- avctx->has_b_frames = 0;
- s->frame.data[0] = NULL;
-
- return 0;
-}
-
-static int msrle_decode_frame(AVCodecContext *avctx,
- void *data, int *data_size,
- uint8_t *buf, int buf_size)
-{
- MsrleContext *s = (MsrleContext *)avctx->priv_data;
-
- s->buf = buf;
- s->size = buf_size;
-
- s->frame.reference = 1;
- s->frame.buffer_hints = FF_BUFFER_HINTS_VALID | FF_BUFFER_HINTS_PRESERVE | FF_BUFFER_HINTS_REUSABLE;
- if (avctx->reget_buffer(avctx, &s->frame)) {
- av_log(avctx, AV_LOG_ERROR, "reget_buffer() failed\n");
- return -1;
- }
-
- switch (avctx->bits_per_sample) {
- case 8:
- msrle_decode_pal8(s);
- break;
- case 4:
- msrle_decode_pal4(s);
- break;
- default:
- av_log(avctx, AV_LOG_ERROR, "Don't know how to decode depth %u.\n",
- avctx->bits_per_sample);
- }
-
- *data_size = sizeof(AVFrame);
- *(AVFrame*)data = s->frame;
-
- /* report that the buffer was completely consumed */
- return buf_size;
-}
-
-static int msrle_decode_end(AVCodecContext *avctx)
-{
- MsrleContext *s = (MsrleContext *)avctx->priv_data;
-
- /* release the last frame */
- if (s->frame.data[0])
- avctx->release_buffer(avctx, &s->frame);
-
- return 0;
-}
-
-AVCodec msrle_decoder = {
- "msrle",
- CODEC_TYPE_VIDEO,
- CODEC_ID_MSRLE,
- sizeof(MsrleContext),
- msrle_decode_init,
- NULL,
- msrle_decode_end,
- msrle_decode_frame,
- CODEC_CAP_DR1,
-};
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