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-rw-r--r--libavcodec/indeo5.c20
-rw-r--r--libavcodec/ivi_common.c27
-rw-r--r--libavcodec/ivi_common.h9
3 files changed, 39 insertions, 17 deletions
diff --git a/libavcodec/indeo5.c b/libavcodec/indeo5.c
index db92fb697e..e7ec538c39 100644
--- a/libavcodec/indeo5.c
+++ b/libavcodec/indeo5.c
@@ -79,10 +79,6 @@ typedef struct {
IVIPicConfig pic_conf;
} IVI5DecContext;
-//! static vlc tables (initialized at startup)
-static VLC mb_vlc_tabs [8];
-static VLC blk_vlc_tabs[8];
-
/**
* Decodes Indeo5 GOP (Group of pictures) header.
@@ -346,7 +342,7 @@ static int decode_pic_hdr(IVI5DecContext *ctx, AVCodecContext *avctx)
if (ctx->frame_flags & 0x40) {
ctx->mb_huff_sel = ff_ivi_dec_huff_desc(&ctx->gb, &new_huff);
if (ctx->mb_huff_sel != 7) {
- ctx->mb_vlc = &mb_vlc_tabs[ctx->mb_huff_sel];
+ ctx->mb_vlc = &ff_ivi_mb_vlc_tabs[ctx->mb_huff_sel];
} else {
if (ff_ivi_huff_desc_cmp(&new_huff, &ctx->mb_huff_desc)) {
ff_ivi_huff_desc_copy(&ctx->mb_huff_desc, &new_huff);
@@ -363,7 +359,7 @@ static int decode_pic_hdr(IVI5DecContext *ctx, AVCodecContext *avctx)
ctx->mb_vlc = &ctx->mb_vlc_cust;
}
} else {
- ctx->mb_vlc = &mb_vlc_tabs[7]; /* select the default macroblock huffman table */
+ ctx->mb_vlc = &ff_ivi_mb_vlc_tabs[7]; /* select the default macroblock huffman table */
}
skip_bits(&ctx->gb, 3); /* FIXME: unknown meaning! */
@@ -426,7 +422,7 @@ static int decode_band_hdr(IVI5DecContext *ctx, IVIBandDesc *band,
if (band_flags & 0x80) {
band->huff_sel = ff_ivi_dec_huff_desc(&ctx->gb, &new_huff);
if (band->huff_sel != 7) {
- band->blk_vlc = &blk_vlc_tabs[band->huff_sel];
+ band->blk_vlc = &ff_ivi_blk_vlc_tabs[band->huff_sel];
} else {
if (ff_ivi_huff_desc_cmp(&new_huff, &band->huff_desc)) {
ff_ivi_huff_desc_copy(&band->huff_desc, &new_huff);
@@ -443,7 +439,7 @@ static int decode_band_hdr(IVI5DecContext *ctx, IVIBandDesc *band,
band->blk_vlc = &band->blk_vlc_cust;
}
} else {
- band->blk_vlc = &blk_vlc_tabs[7]; /* select the default macroblock huffman table */
+ band->blk_vlc = &ff_ivi_blk_vlc_tabs[7]; /* select the default macroblock huffman table */
}
band->checksum_present = get_bits1(&ctx->gb);
@@ -752,13 +748,9 @@ static void switch_buffers(IVI5DecContext *ctx, AVCodecContext *avctx)
static av_cold int decode_init(AVCodecContext *avctx)
{
IVI5DecContext *ctx = avctx->priv_data;
- int i, result;
+ int result;
- /* initialize static vlc tables for macroblock/block signals */
- for (i = 0; i < 8; i++) {
- ff_ivi_create_huff_from_desc(&ff_ivi_mb_huff_desc[i], &mb_vlc_tabs[i], 1);
- ff_ivi_create_huff_from_desc(&ff_ivi_blk_huff_desc[i], &blk_vlc_tabs[i], 1);
- }
+ ff_ivi_init_static_vlc();
/* copy rvmap tables in our context so we can apply changes to them */
memcpy(ctx->rvmap_tabs, ff_ivi_rvmap_tabs, sizeof(ff_ivi_rvmap_tabs));
diff --git a/libavcodec/ivi_common.c b/libavcodec/ivi_common.c
index 46266b15d4..86ca76ed15 100644
--- a/libavcodec/ivi_common.c
+++ b/libavcodec/ivi_common.c
@@ -33,6 +33,12 @@
#include "libavutil/common.h"
#include "ivi_dsp.h"
+extern const IVIHuffDesc ff_ivi_mb_huff_desc[8]; ///< static macroblock huffman tables
+extern const IVIHuffDesc ff_ivi_blk_huff_desc[8]; ///< static block huffman tables
+
+VLC ff_ivi_mb_vlc_tabs [8];
+VLC ff_ivi_blk_vlc_tabs[8];
+
/**
* Reverses "nbits" bits of the value "val" and returns the result
* in the least significant bits.
@@ -80,7 +86,26 @@ int ff_ivi_create_huff_from_desc(const IVIHuffDesc *cb, VLC *vlc, int flag)
/* number of codewords = pos */
return init_vlc(vlc, IVI_VLC_BITS, pos, bits, 1, 1, codewords, 2, 2,
- (flag & 1) | INIT_VLC_LE);
+ (flag ? INIT_VLC_USE_NEW_STATIC : 0) | INIT_VLC_LE);
+}
+
+void ff_ivi_init_static_vlc()
+{
+ int i;
+ static VLC table_data[8192 * 16][2];
+ static int initialized_vlcs = 0;
+
+ if (initialized_vlcs)
+ return;
+ for (i = 0; i < 8; i++) {
+ ff_ivi_mb_vlc_tabs[i].table = table_data + i * 2 * 8192;
+ ff_ivi_mb_vlc_tabs[i].table_allocated = 8192;
+ ff_ivi_create_huff_from_desc(&ff_ivi_mb_huff_desc[i], &ff_ivi_mb_vlc_tabs[i], 1);
+ ff_ivi_blk_vlc_tabs[i].table = table_data + (i * 2 + 1) * 8192;
+ ff_ivi_blk_vlc_tabs[i].table_allocated = 8192;
+ ff_ivi_create_huff_from_desc(&ff_ivi_blk_huff_desc[i], &ff_ivi_blk_vlc_tabs[i], 1);
+ }
+ initialized_vlcs = 1;
}
int ff_ivi_dec_huff_desc(GetBitContext *gb, IVIHuffDesc *desc)
diff --git a/libavcodec/ivi_common.h b/libavcodec/ivi_common.h
index dae4e956b3..5450e01398 100644
--- a/libavcodec/ivi_common.h
+++ b/libavcodec/ivi_common.h
@@ -45,8 +45,8 @@ typedef struct {
uint8_t xbits[16];
} IVIHuffDesc;
-extern const IVIHuffDesc ff_ivi_mb_huff_desc[8]; ///< static macroblock huffman tables
-extern const IVIHuffDesc ff_ivi_blk_huff_desc[8]; ///< static block huffman tables
+extern VLC ff_ivi_mb_vlc_tabs [8]; ///< static macroblock Huffman tables
+extern VLC ff_ivi_blk_vlc_tabs[8]; ///< static block Huffman tables
/**
@@ -203,6 +203,11 @@ static inline int ivi_scale_mv(int mv, int mv_scale)
int ff_ivi_create_huff_from_desc(const IVIHuffDesc *cb, VLC *vlc, int flag);
/**
+ * Initializes static codes used for macroblock and block decoding.
+ */
+void ff_ivi_init_static_vlc();
+
+/**
* Decodes a huffman codebook descriptor from the bitstream.
*
* @param gb [in,out] the GetBit context