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msrle uncompressed decoding, fix #1074 and many other samples under /RLE

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Originally committed as revision 18970 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Baptiste Coudurier 2009-05-27 21:45:25 +00:00
parent c0601d705c
commit 2ed16f308a
1 changed files with 38 additions and 2 deletions
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40
libavcodec/msrle.c
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@ -55,7 +55,19 @@ static av_cold int msrle_decode_init(AVCodecContext *avctx)
s->avctx = avctx;
avctx->pix_fmt = PIX_FMT_PAL8;
switch (avctx->bits_per_coded_sample) {
case 4:
case 8:
avctx->pix_fmt = PIX_FMT_PAL8;
break;
case 24:
avctx->pix_fmt = PIX_FMT_BGR24;
break;
default:
av_log(avctx, AV_LOG_ERROR, "unsupported bits per sample\n");
return -1;
}
s->frame.data[0] = NULL;
return 0;
@ -68,6 +80,7 @@ static int msrle_decode_frame(AVCodecContext *avctx,
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;
s->buf = buf;
s->size = buf_size;
@ -88,7 +101,30 @@ static int msrle_decode_frame(AVCodecContext *avctx,
}
}
ff_msrle_decode(avctx, (AVPicture*)&s->frame, avctx->bits_per_coded_sample, buf, buf_size);
/* FIXME how to correctly detect RLE ??? */
if (avctx->height * istride == avpkt->size) { /* assume uncompressed */
int linesize = avctx->width * avctx->bits_per_coded_sample / 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 {
ff_msrle_decode(avctx, (AVPicture*)&s->frame, avctx->bits_per_coded_sample, buf, buf_size);
}
*data_size = sizeof(AVFrame);
*(AVFrame*)data = s->frame;