*/
/**
- * @file tiertexseqv.c
+ * @file libavcodec/tiertexseqv.c
* Tiertex Limited SEQ video decoder
*/
#include "avcodec.h"
-#include "common.h"
#define ALT_BITSTREAM_READER_LE
-#include "bitstream.h"
+#include "get_bits.h"
typedef struct SeqVideoContext {
AVCodecContext *avctx;
AVFrame frame;
- unsigned int palette[256];
- unsigned char block[8 * 8];
} SeqVideoContext;
-static unsigned char *seq_unpack_rle_block(unsigned char *src, unsigned char *dst, int dst_size)
+static const unsigned char *seq_unpack_rle_block(const unsigned char *src, unsigned char *dst, int dst_size)
{
int i, len, sz;
GetBitContext gb;
return src;
}
-static unsigned char *seq_decode_op1(SeqVideoContext *seq, unsigned char *src, unsigned char *dst)
+static const unsigned char *seq_decode_op1(SeqVideoContext *seq, const unsigned char *src, unsigned char *dst)
{
- unsigned char *color_table;
+ const unsigned char *color_table;
int b, i, len, bits;
GetBitContext gb;
+ unsigned char block[8 * 8];
len = *src++;
if (len & 0x80) {
switch (len & 3) {
case 1:
- src = seq_unpack_rle_block(src, seq->block, sizeof(seq->block));
+ src = seq_unpack_rle_block(src, block, sizeof(block));
for (b = 0; b < 8; b++) {
- memcpy(dst, &seq->block[b * 8], 8);
+ memcpy(dst, &block[b * 8], 8);
dst += seq->frame.linesize[0];
}
break;
case 2:
- src = seq_unpack_rle_block(src, seq->block, sizeof(seq->block));
+ src = seq_unpack_rle_block(src, block, sizeof(block));
for (i = 0; i < 8; i++) {
for (b = 0; b < 8; b++)
- dst[b * seq->frame.linesize[0]] = seq->block[i * 8 + b];
+ dst[b * seq->frame.linesize[0]] = block[i * 8 + b];
++dst;
}
break;
return src;
}
-static unsigned char *seq_decode_op2(SeqVideoContext *seq, unsigned char *src, unsigned char *dst)
+static const unsigned char *seq_decode_op2(SeqVideoContext *seq, const unsigned char *src, unsigned char *dst)
{
int i;
return src;
}
-static unsigned char *seq_decode_op3(SeqVideoContext *seq, unsigned char *src, unsigned char *dst)
+static const unsigned char *seq_decode_op3(SeqVideoContext *seq, const unsigned char *src, unsigned char *dst)
{
int pos, offset;
return src;
}
-static void seqvideo_decode(SeqVideoContext *seq, unsigned char *data, int data_size)
+static void seqvideo_decode(SeqVideoContext *seq, const unsigned char *data, int data_size)
{
GetBitContext gb;
int flags, i, j, x, y, op;
unsigned char c[3];
unsigned char *dst;
+ uint32_t *palette;
flags = *data++;
if (flags & 1) {
+ palette = (uint32_t *)seq->frame.data[1];
for (i = 0; i < 256; i++) {
for (j = 0; j < 3; j++, data++)
c[j] = (*data << 2) | (*data >> 4);
- seq->palette[i] = (c[0] << 16) | (c[1] << 8) | c[2];
+ palette[i] = AV_RB24(c);
}
- memcpy(seq->frame.data[1], seq->palette, sizeof(seq->palette));
seq->frame.palette_has_changed = 1;
}
}
}
-static int seqvideo_decode_init(AVCodecContext *avctx)
+static av_cold int seqvideo_decode_init(AVCodecContext *avctx)
{
- SeqVideoContext *seq = (SeqVideoContext *)avctx->priv_data;
+ SeqVideoContext *seq = avctx->priv_data;
seq->avctx = avctx;
avctx->pix_fmt = PIX_FMT_PAL8;
- avctx->has_b_frames = 0;
seq->frame.data[0] = NULL;
static int seqvideo_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;
- SeqVideoContext *seq = (SeqVideoContext *)avctx->priv_data;
+ SeqVideoContext *seq = avctx->priv_data;
seq->frame.reference = 1;
seq->frame.buffer_hints = FF_BUFFER_HINTS_VALID | FF_BUFFER_HINTS_PRESERVE | FF_BUFFER_HINTS_REUSABLE;
return buf_size;
}
-static int seqvideo_decode_end(AVCodecContext *avctx)
+static av_cold int seqvideo_decode_end(AVCodecContext *avctx)
{
- SeqVideoContext *seq = (SeqVideoContext *)avctx->priv_data;
+ SeqVideoContext *seq = avctx->priv_data;
if (seq->frame.data[0])
avctx->release_buffer(avctx, &seq->frame);
seqvideo_decode_end,
seqvideo_decode_frame,
CODEC_CAP_DR1,
+ .long_name = NULL_IF_CONFIG_SMALL("Tiertex Limited SEQ video"),
};