/*
- * Autodesc RLE Decoder
+ * Autodesk RLE Decoder
* Copyright (C) 2005 the ffmpeg project
*
* This file is part of FFmpeg.
*/
/**
- * @file aasc.c
- * Autodesc RLE Video Decoder by Konstantin Shishkov
+ * @file
+ * Autodesk RLE Video Decoder by Konstantin Shishkov
*/
#include <stdio.h>
#include "avcodec.h"
#include "dsputil.h"
+#include "msrledec.h"
typedef struct AascContext {
AVCodecContext *avctx;
} \
stream_byte = buf[stream_ptr++];
-static int aasc_decode_init(AVCodecContext *avctx)
+static av_cold int aasc_decode_init(AVCodecContext *avctx)
{
AascContext *s = avctx->priv_data;
s->avctx = avctx;
avctx->pix_fmt = PIX_FMT_BGR24;
- s->frame.data[0] = NULL;
return 0;
}
static int aasc_decode_frame(AVCodecContext *avctx,
void *data, int *data_size,
- uint8_t *buf, int buf_size)
+ AVPacket *avpkt)
{
+ const uint8_t *buf = avpkt->data;
+ int buf_size = avpkt->size;
AascContext *s = avctx->priv_data;
- int stream_ptr = 4;
- unsigned char rle_code;
- unsigned char stream_byte;
- int pixel_ptr = 0;
- int row_dec, row_ptr;
- int frame_size;
- int i;
+ int compr, i, stride;
s->frame.reference = 1;
s->frame.buffer_hints = FF_BUFFER_HINTS_VALID | FF_BUFFER_HINTS_PRESERVE | FF_BUFFER_HINTS_REUSABLE;
return -1;
}
- row_dec = s->frame.linesize[0];
- row_ptr = (s->avctx->height - 1) * row_dec;
- frame_size = row_dec * s->avctx->height;
-
- 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 */
- break;
- } 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 ((pixel_ptr + stream_byte > avctx->width * 3) ||
- (row_ptr < 0)) {
- av_log(s->avctx, AV_LOG_ERROR, " AASC: frame ptr just went out of bounds (copy1)\n");
- break;
- }
-
- rle_code = stream_byte;
- if (stream_ptr + rle_code > buf_size) {
- av_log(s->avctx, AV_LOG_ERROR, " AASC: stream ptr just went out of bounds (copy2)\n");
- break;
- }
-
- for (i = 0; i < rle_code; i++) {
- FETCH_NEXT_STREAM_BYTE();
- s->frame.data[0][row_ptr + pixel_ptr] = stream_byte;
- pixel_ptr++;
- }
- if (rle_code & 1)
- stream_ptr++;
- }
- } else {
- /* decode a run of data */
- if ((pixel_ptr + rle_code > avctx->width * 3) ||
- (row_ptr < 0)) {
- av_log(s->avctx, AV_LOG_ERROR, " AASC: frame ptr just went out of bounds (run1)\n");
- break;
- }
-
- FETCH_NEXT_STREAM_BYTE();
-
- while(rle_code--) {
- s->frame.data[0][row_ptr + pixel_ptr] = stream_byte;
- pixel_ptr++;
- }
+ compr = AV_RL32(buf);
+ buf += 4;
+ buf_size -= 4;
+ switch(compr){
+ case 0:
+ stride = (avctx->width * 3 + 3) & ~3;
+ for(i = avctx->height - 1; i >= 0; i--){
+ memcpy(s->frame.data[0] + i*s->frame.linesize[0], buf, avctx->width*3);
+ buf += stride;
}
+ break;
+ case 1:
+ ff_msrle_decode(avctx, (AVPicture*)&s->frame, 8, buf - 4, buf_size + 4);
+ break;
+ default:
+ av_log(avctx, AV_LOG_ERROR, "Unknown compression type %d\n", compr);
+ return -1;
}
- /* one last sanity check on the way out */
- if (stream_ptr < buf_size)
- av_log(s->avctx, AV_LOG_ERROR, " AASC: ended frame decode with bytes left over (%d < %d)\n",
- stream_ptr, buf_size);
-
*data_size = sizeof(AVFrame);
*(AVFrame*)data = s->frame;
return buf_size;
}
-static int aasc_decode_end(AVCodecContext *avctx)
+static av_cold int aasc_decode_end(AVCodecContext *avctx)
{
AascContext *s = avctx->priv_data;
AVCodec aasc_decoder = {
"aasc",
- CODEC_TYPE_VIDEO,
+ AVMEDIA_TYPE_VIDEO,
CODEC_ID_AASC,
sizeof(AascContext),
aasc_decode_init,
aasc_decode_end,
aasc_decode_frame,
CODEC_CAP_DR1,
+ .long_name = NULL_IF_CONFIG_SMALL("Autodesk RLE"),
};