virtualenv/FFmpeg
1
0
Fork 0
mirror of https://github.com/FFmpeg/FFmpeg.git synced 2024-12-23 12:43:46 +02:00
Code Issues Releases Activity

Macroblock and block Huffman code sets are to be used by both Indeo 4 and

Browse Source 
Indeo 5, so make them global and move their initialization to the common place
as well. And fix static VLC initialization, as ff_ivi_create_huff_from_desc()
used old way to do so.

Originally committed as revision 21962 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Kostya Shishkov 2010-02-22 13:51:32 +00:00
parent bb29fee3a6
commit 9068f36dcc
3 changed files with 39 additions and 17 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

20
libavcodec/indeo5.c
View File

@ -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));

27
libavcodec/ivi_common.c
View File

@ -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)

9
libavcodec/ivi_common.h
View File

@ -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
/**
@ -202,6 +202,11 @@ 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.
*