* Interplay C93 video decoder
* Copyright (c) 2007 Anssi Hannula <anssi.hannula@gmail.com>
*
- * 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
- * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
- * MA 02110-1301 USA
+ * License along with Libav; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include "avcodec.h"
#define C93_HAS_PALETTE 0x01
#define C93_FIRST_FRAME 0x02
-static int c93_decode_init(AVCodecContext *avctx)
+static av_cold int decode_init(AVCodecContext *avctx)
{
avctx->pix_fmt = PIX_FMT_PAL8;
return 0;
}
-static int c93_decode_end(AVCodecContext *avctx)
+static av_cold int decode_end(AVCodecContext *avctx)
{
C93DecoderContext * const c93 = avctx->priv_data;
return 0;
}
-static inline int c93_copy_block(AVCodecContext *avctx, uint8_t *to,
+static inline int copy_block(AVCodecContext *avctx, uint8_t *to,
uint8_t *from, int offset, int height, int stride)
{
int i;
return 0;
}
-static inline void c93_draw_n_color(uint8_t *out, int stride, int width,
+static inline void draw_n_color(uint8_t *out, int stride, int width,
int height, int bpp, uint8_t cols[4], uint8_t grps[4], uint32_t col)
{
int x, y;
}
}
-static int c93_decode_frame(AVCodecContext *avctx, void *data,
- int *data_size, uint8_t * buf, int buf_size)
+static int decode_frame(AVCodecContext *avctx, void *data,
+ int *data_size, AVPacket *avpkt)
{
+ const uint8_t *buf = avpkt->data;
+ int buf_size = avpkt->size;
C93DecoderContext * const c93 = avctx->priv_data;
AVFrame * const newpic = &c93->pictures[c93->currentpic];
AVFrame * const oldpic = &c93->pictures[c93->currentpic^1];
AVFrame *picture = data;
uint8_t *out;
- int stride, i, x, y;
- C93BlockType bt = 0;
+ int stride, i, x, y, bt = 0;
c93->currentpic ^= 1;
stride = newpic->linesize[0];
if (buf[0] & C93_FIRST_FRAME) {
- newpic->pict_type = FF_I_TYPE;
+ newpic->pict_type = AV_PICTURE_TYPE_I;
newpic->key_frame = 1;
} else {
- newpic->pict_type = FF_P_TYPE;
+ newpic->pict_type = AV_PICTURE_TYPE_P;
newpic->key_frame = 0;
}
if (*buf++ & C93_HAS_PALETTE) {
uint32_t *palette = (uint32_t *) newpic->data[1];
- uint8_t *palbuf = buf + buf_size - 768 - 1;
+ const uint8_t *palbuf = buf + buf_size - 768 - 1;
for (i = 0; i < 256; i++) {
palette[i] = bytestream_get_be24(&palbuf);
}
uint8_t *copy_from = oldpic->data[0];
unsigned int offset, j;
uint8_t cols[4], grps[4];
+ C93BlockType block_type;
if (!bt)
bt = *buf++;
- switch (bt & 0x0F) {
+ block_type= bt & 0x0F;
+ switch (block_type) {
case C93_8X8_FROM_PREV:
offset = bytestream_get_le16(&buf);
- if (c93_copy_block(avctx, out, copy_from, offset, 8, stride))
+ if (copy_block(avctx, out, copy_from, offset, 8, stride))
return -1;
break;
for (j = 0; j < 8; j += 4) {
for (i = 0; i < 8; i += 4) {
offset = bytestream_get_le16(&buf);
- if (c93_copy_block(avctx, &out[j*stride+i],
+ if (copy_block(avctx, &out[j*stride+i],
copy_from, offset, 4, stride))
return -1;
}
case C93_8X8_2COLOR:
bytestream_get_buffer(&buf, cols, 2);
for (i = 0; i < 8; i++) {
- c93_draw_n_color(out + i*stride, stride, 8, 1, 1, cols,
+ draw_n_color(out + i*stride, stride, 8, 1, 1, cols,
NULL, *buf++);
}
case C93_4X4_4COLOR_GRP:
for (j = 0; j < 8; j += 4) {
for (i = 0; i < 8; i += 4) {
- if ((bt & 0x0F) == C93_4X4_2COLOR) {
+ if (block_type == C93_4X4_2COLOR) {
bytestream_get_buffer(&buf, cols, 2);
- c93_draw_n_color(out + i + j*stride, stride, 4, 4,
+ draw_n_color(out + i + j*stride, stride, 4, 4,
1, cols, NULL, bytestream_get_le16(&buf));
- } else if ((bt & 0x0F) == C93_4X4_4COLOR) {
+ } else if (block_type == C93_4X4_4COLOR) {
bytestream_get_buffer(&buf, cols, 4);
- c93_draw_n_color(out + i + j*stride, stride, 4, 4,
+ draw_n_color(out + i + j*stride, stride, 4, 4,
2, cols, NULL, bytestream_get_le32(&buf));
} else {
bytestream_get_buffer(&buf, grps, 4);
- c93_draw_n_color(out + i + j*stride, stride, 4, 4,
+ draw_n_color(out + i + j*stride, stride, 4, 4,
1, cols, grps, bytestream_get_le16(&buf));
}
}
default:
av_log(avctx, AV_LOG_ERROR, "unexpected type %x at %dx%d\n",
- bt & 0x0F, x, y);
+ block_type, x, y);
return -1;
}
bt >>= 4;
return buf_size;
}
-AVCodec c93_decoder = {
+AVCodec ff_c93_decoder = {
"c93",
- CODEC_TYPE_VIDEO,
+ AVMEDIA_TYPE_VIDEO,
CODEC_ID_C93,
sizeof(C93DecoderContext),
- c93_decode_init,
+ decode_init,
NULL,
- c93_decode_end,
- c93_decode_frame,
+ decode_end,
+ decode_frame,
CODEC_CAP_DR1,
+ .long_name = NULL_IF_CONFIG_SMALL("Interplay C93"),
};
projects / ffmpeg / blobdiff