split up header parsing function

[ffmpeg] / libavcodec / tiertexseqv.c

diff --git a/libavcodec/tiertexseqv.c b/libavcodec/tiertexseqv.c
index c9229e5ccee331011cfbc37ae7a706630cf71f46..11766cbc8c35522688de77a440299e9e82c9a352 100644 (file)
--- a/libavcodec/tiertexseqv.c
+++ b/libavcodec/tiertexseqv.c
@@ -25,7 +25,6 @@
  */
 
 #include "avcodec.h"
-#include "common.h"
 #define ALT_BITSTREAM_READER_LE
 #include "bitstream.h"
 
@@ -38,7 +37,7 @@ typedef struct SeqVideoContext {
 } 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;
@@ -68,9 +67,9 @@ static unsigned char *seq_unpack_rle_block(unsigned char *src, unsigned char *ds
     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;
 
@@ -108,7 +107,7 @@ static unsigned char *seq_decode_op1(SeqVideoContext *seq, unsigned char *src, u
     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;
 
@@ -121,7 +120,7 @@ static unsigned char *seq_decode_op2(SeqVideoContext *seq, unsigned char *src, u
     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;
 
@@ -134,7 +133,7 @@ static unsigned char *seq_decode_op3(SeqVideoContext *seq, unsigned char *src, u
     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;
@@ -147,7 +146,7 @@ static void seqvideo_decode(SeqVideoContext *seq, unsigned char *data, int data_
         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];
+            seq->palette[i] = AV_RB24(c);
         }
         memcpy(seq->frame.data[1], seq->palette, sizeof(seq->palette));
         seq->frame.palette_has_changed = 1;
@@ -174,7 +173,7 @@ static void seqvideo_decode(SeqVideoContext *seq, unsigned char *data, int data_
     }
 }
 
-static int seqvideo_decode_init(AVCodecContext *avctx)
+static av_cold int seqvideo_decode_init(AVCodecContext *avctx)
 {
     SeqVideoContext *seq = avctx->priv_data;
 
@@ -186,9 +185,9 @@ static int seqvideo_decode_init(AVCodecContext *avctx)
     return 0;
 }
 
-static int seqvideo_decode_frame(AVCodecContext *avctx,
+static av_cold int seqvideo_decode_frame(AVCodecContext *avctx,
                                  void *data, int *data_size,
-                                 uint8_t *buf, int buf_size)
+                                 const uint8_t *buf, int buf_size)
 {
 
     SeqVideoContext *seq = avctx->priv_data;
@@ -228,4 +227,5 @@ AVCodec tiertexseqvideo_decoder = {
     seqvideo_decode_end,
     seqvideo_decode_frame,
     CODEC_CAP_DR1,
+    .long_name = "Tiertex Limited SEQ video",
 };