* Miro VideoXL codec
* Copyright (c) 2004 Konstantin Shishkov
*
- * This file is part of FFmpeg.
+ * This file is part of Libav.
*
- * FFmpeg is free software; you can redistribute it and/or
+ * Libav 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,
+ * Libav 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
+ * License along with Libav; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
/**
- * @file libavcodec/xl.c
+ * @file
* Miro VideoXL codec.
*/
+#include "libavutil/common.h"
#include "libavutil/intreadwrite.h"
#include "avcodec.h"
-
-typedef struct VideoXLContext{
- AVCodecContext *avctx;
- AVFrame pic;
-} VideoXLContext;
+#include "internal.h"
static const int xl_table[32] = {
0, 1, 2, 3, 4, 5, 6, 7,
8, 9, 12, 15, 20, 25, 34, 46,
64, 82, 94, 103, 108, 113, 116, 119,
- 120, 121, 122, 123, 124, 125, 126, 127};
+ 120, 121, 122, 123, 124, 125, 126, 127
+};
static int decode_frame(AVCodecContext *avctx,
- void *data, int *data_size,
+ void *data, int *got_frame,
AVPacket *avpkt)
{
const uint8_t *buf = avpkt->data;
- int buf_size = avpkt->size;
- VideoXLContext * const a = avctx->priv_data;
- AVFrame * const p= (AVFrame*)&a->pic;
+ int buf_size = avpkt->size;
+ AVFrame *const p = data;
uint8_t *Y, *U, *V;
- int i, j;
+ int i, j, ret;
int stride;
uint32_t val;
int y0, y1, y2, y3 = 0, c0 = 0, c1 = 0;
- if(p->data[0])
- avctx->release_buffer(avctx, p);
+ if (avctx->width % 4) {
+ av_log(avctx, AV_LOG_ERROR, "Width not a multiple of 4.\n");
+ return AVERROR_INVALIDDATA;
+ }
- p->reference = 0;
- if(avctx->get_buffer(avctx, p) < 0){
+ if (buf_size < avctx->width * avctx->height) {
+ av_log(avctx, AV_LOG_ERROR, "Packet is too small\n");
+ return AVERROR_INVALIDDATA;
+ }
+
+ if ((ret = ff_get_buffer(avctx, p, 0)) < 0) {
av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n");
- return -1;
+ return ret;
}
- p->pict_type= FF_I_TYPE;
- p->key_frame= 1;
+ p->pict_type = AV_PICTURE_TYPE_I;
+ p->key_frame = 1;
- Y = a->pic.data[0];
- U = a->pic.data[1];
- V = a->pic.data[2];
+ Y = p->data[0];
+ U = p->data[1];
+ V = p->data[2];
stride = avctx->width - 4;
+
for (i = 0; i < avctx->height; i++) {
/* lines are stored in reversed order */
buf += stride;
for (j = 0; j < avctx->width; j += 4) {
/* value is stored in LE dword with word swapped */
- val = AV_RL32(buf);
+ val = AV_RL32(buf);
buf -= 4;
- val = ((val >> 16) & 0xFFFF) | ((val & 0xFFFF) << 16);
+ val = ((val >> 16) & 0xFFFF) | ((val & 0xFFFF) << 16);
- if(!j)
+ if (!j)
y0 = (val & 0x1F) << 2;
else
y0 = y3 + xl_table[val & 0x1F];
val >>= 5;
- y1 = y0 + xl_table[val & 0x1F];
+ y1 = y0 + xl_table[val & 0x1F];
val >>= 5;
- y2 = y1 + xl_table[val & 0x1F];
+ y2 = y1 + xl_table[val & 0x1F];
val >>= 6; /* align to word */
- y3 = y2 + xl_table[val & 0x1F];
+ y3 = y2 + xl_table[val & 0x1F];
val >>= 5;
- if(!j)
+ if (!j)
c0 = (val & 0x1F) << 2;
else
c0 += xl_table[val & 0x1F];
val >>= 5;
- if(!j)
+ if (!j)
c1 = (val & 0x1F) << 2;
else
c1 += xl_table[val & 0x1F];
}
buf += avctx->width + 4;
- Y += a->pic.linesize[0];
- U += a->pic.linesize[1];
- V += a->pic.linesize[2];
+ Y += p->linesize[0];
+ U += p->linesize[1];
+ V += p->linesize[2];
}
- *data_size = sizeof(AVFrame);
- *(AVFrame*)data = a->pic;
+ *got_frame = 1;
return buf_size;
}
-static av_cold int decode_init(AVCodecContext *avctx){
-// VideoXLContext * const a = avctx->priv_data;
-
- avctx->pix_fmt= PIX_FMT_YUV411P;
-
- return 0;
-}
-
-static av_cold int decode_end(AVCodecContext *avctx){
- VideoXLContext * const a = avctx->priv_data;
- AVFrame *pic = &a->pic;
-
- if (pic->data[0])
- avctx->release_buffer(avctx, pic);
+static av_cold int decode_init(AVCodecContext *avctx)
+{
+ avctx->pix_fmt = AV_PIX_FMT_YUV411P;
return 0;
}
-AVCodec xl_decoder = {
- "xl",
- AVMEDIA_TYPE_VIDEO,
- CODEC_ID_VIXL,
- sizeof(VideoXLContext),
- decode_init,
- NULL,
- decode_end,
- decode_frame,
- CODEC_CAP_DR1,
- .long_name = NULL_IF_CONFIG_SMALL("Miro VideoXL"),
+AVCodec ff_xl_decoder = {
+ .name = "xl",
+ .long_name = NULL_IF_CONFIG_SMALL("Miro VideoXL"),
+ .type = AVMEDIA_TYPE_VIDEO,
+ .id = AV_CODEC_ID_VIXL,
+ .init = decode_init,
+ .decode = decode_frame,
+ .capabilities = CODEC_CAP_DR1,
};
projects / ffmpeg / blobdiff