/*
- * Id Quake II CIN Video Decoder
+ * id Quake II CIN Video Decoder
* Copyright (C) 2003 the ffmpeg project
*
* This file is part of FFmpeg.
* 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 idcinvideo.c
- * Id Quake II Cin Video Decoder by Dr. Tim Ferguson
- * For more information about the Id CIN format, visit:
+ * id Quake II Cin Video Decoder by Dr. Tim Ferguson
+ * For more information about the id CIN format, visit:
* http://www.csse.monash.edu.au/~timf/
*
* This video decoder outputs PAL8 colorspace data. Interacting with this
* the demuxer must use the same extradata space to transmit an
* AVPaletteControl structure.
*
- * Id CIN video is purely Huffman-coded, intraframe-only codec. It achieves
+ * id CIN video is purely Huffman-coded, intraframe-only codec. It achieves
* a little more compression by exploiting the fact that adjacent pixels
* tend to be similar.
*
#include <unistd.h>
#include "avcodec.h"
-#include "dsputil.h"
#define HUFFMAN_TABLE_SIZE 64 * 1024
#define HUF_TOKENS 256
int count;
unsigned char used;
int children[2];
-} hnode_t;
+} hnode;
typedef struct IdcinContext {
AVCodecContext *avctx;
- DSPContext dsp;
AVFrame frame;
- unsigned char *buf;
+ const unsigned char *buf;
int size;
- hnode_t huff_nodes[256][HUF_TOKENS*2];
+ hnode huff_nodes[256][HUF_TOKENS*2];
int num_huff_nodes[256];
} IdcinContext;
* Returns the node index of the lowest unused node, or -1 if all nodes
* are used.
*/
-static int huff_smallest_node(hnode_t *hnodes, int num_hnodes) {
+static int huff_smallest_node(hnode *hnodes, int num_hnodes) {
int i;
int best, best_node;
* num_huff_nodes[prev] - contains the index to the root node of the tree.
* That is: huff_nodes[prev][num_huff_nodes[prev]] is the root node.
*/
-static void huff_build_tree(IdcinContext *s, int prev) {
- hnode_t *node, *hnodes;
+static av_cold void huff_build_tree(IdcinContext *s, int prev) {
+ hnode *node, *hnodes;
int num_hnodes, i;
num_hnodes = HUF_TOKENS;
s->num_huff_nodes[prev] = num_hnodes - 1;
}
-static int idcin_decode_init(AVCodecContext *avctx)
+static av_cold int idcin_decode_init(AVCodecContext *avctx)
{
IdcinContext *s = avctx->priv_data;
int i, j, histogram_index = 0;
s->avctx = avctx;
avctx->pix_fmt = PIX_FMT_PAL8;
- dsputil_init(&s->dsp, avctx);
/* make sure the Huffman tables make it */
if (s->avctx->extradata_size != HUFFMAN_TABLE_SIZE) {
- av_log(s->avctx, AV_LOG_ERROR, " Id CIN video: expected extradata size of %d\n", HUFFMAN_TABLE_SIZE);
+ av_log(s->avctx, AV_LOG_ERROR, " id CIN video: expected extradata size of %d\n", HUFFMAN_TABLE_SIZE);
return -1;
}
static void idcin_decode_vlcs(IdcinContext *s)
{
- hnode_t *hnodes;
+ hnode *hnodes;
long x, y;
int prev;
unsigned char v = 0;
static int idcin_decode_frame(AVCodecContext *avctx,
void *data, int *data_size,
- uint8_t *buf, int buf_size)
+ const uint8_t *buf, int buf_size)
{
IdcinContext *s = avctx->priv_data;
AVPaletteControl *palette_control = avctx->palctrl;
avctx->release_buffer(avctx, &s->frame);
if (avctx->get_buffer(avctx, &s->frame)) {
- av_log(avctx, AV_LOG_ERROR, " Id CIN Video: get_buffer() failed\n");
+ av_log(avctx, AV_LOG_ERROR, " id CIN Video: get_buffer() failed\n");
return -1;
}
return buf_size;
}
-static int idcin_decode_end(AVCodecContext *avctx)
+static av_cold int idcin_decode_end(AVCodecContext *avctx)
{
IdcinContext *s = avctx->priv_data;
idcin_decode_end,
idcin_decode_frame,
CODEC_CAP_DR1,
+ .long_name = NULL_IF_CONFIG_SMALL("id Quake II CIN video"),
};