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nsc: refactor nsc decoder #2

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o Change nsc_stream member to be static
o Rename some variables
o Planes member (originally pdata) does not need to be STREAM
This commit is contained in:
Vic Lee 2012-03-05 18:34:29 +08:00
parent 3fa2c4830e
commit 0c0dd5df10
2 changed files with 21 additions and 21 deletions
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7
include/freerdp/codec/nsc.h
View File

@ -35,17 +35,17 @@ extern "C" {
struct _NSC_STREAM
{
uint32 PlaneByteCount[4];
uint8 colorLossLevel;
uint8 ColorLossLevel;
uint8 ChromaSubSamplingLevel;
uint16 Reserved;
STREAM* pdata;
uint8* Planes;
};
typedef struct _NSC_STREAM NSC_STREAM;
struct _NSC_CONTEXT
{
uint32 OrgByteCount[4]; /* original byte length of luma, chroma orange, chroma green, alpha variable in order */
NSC_STREAM* nsc_stream;
NSC_STREAM nsc_stream;
uint16 bpp;
uint16 width;
uint16 height;
@ -60,7 +60,6 @@ FREERDP_API void nsc_process_message(NSC_CONTEXT* context, uint16 bpp,
uint16 width, uint16 height, uint8* data, uint32 length);
FREERDP_API void nsc_rle_decompress_data(NSC_CONTEXT* context);
FREERDP_API void nsc_ycocg_rgb_convert(NSC_CONTEXT* context);
FREERDP_API void nsc_rle_decode(STREAM* in, STREAM* out, uint32 origsz);
FREERDP_API void nsc_chroma_supersample(NSC_CONTEXT* context);
FREERDP_API void nsc_cl_expand(STREAM* stream, uint8 shiftcount, uint32 origsz);
FREERDP_API void nsc_colorloss_recover(NSC_CONTEXT* context);

35
libfreerdp-codec/nsc.c
View File

@ -199,13 +199,13 @@ void nsc_colorloss_recover(NSC_CONTEXT* context)
{
int i;
uint8 cllvl;
cllvl = context->nsc_stream->colorLossLevel;
cllvl = context->nsc_stream.ColorLossLevel;
for (i = 1; i < 3; i++)
nsc_cl_expand(context->org_buf[i], cllvl, context->OrgByteCount[i]);
}
void nsc_rle_decode(STREAM* in, STREAM* out, uint32 origsz)
static void nsc_rle_decode(STREAM* in, STREAM* out, uint32 origsz)
{
uint32 i;
uint8 value;
@ -252,26 +252,29 @@ void nsc_rle_decode(STREAM* in, STREAM* out, uint32 origsz)
void nsc_rle_decompress_data(NSC_CONTEXT* context)
{
STREAM* rles;
uint16 i;
STREAM* rles;
uint32 origsize;
rles = stream_new(0);
rles->p = rles->data = context->nsc_stream->pdata->p;
rles->size = context->nsc_stream->pdata->size;
stream_attach(rles, context->nsc_stream.Planes, BYTESUM(context->nsc_stream.PlaneByteCount));
for (i = 0; i < 4; i++)
{
origsize = context->OrgByteCount[i];
if (i == 3 && context->nsc_stream->PlaneByteCount[i] == 0)
if (i == 3 && context->nsc_stream.PlaneByteCount[i] == 0)
stream_set_byte(context->org_buf[i], 0xff, origsize);
else if (context->nsc_stream->PlaneByteCount[i] < origsize)
else if (context->nsc_stream.PlaneByteCount[i] < origsize)
nsc_rle_decode(rles, context->org_buf[i], origsize);
else
stream_copy(context->org_buf[i], rles, origsize);
context->org_buf[i]->p = context->org_buf[i]->data;
}
stream_detach(rles);
stream_free(rles);
}
void nsc_combine_argb(NSC_CONTEXT* context)
@ -294,15 +297,13 @@ static void nsc_stream_initialize(NSC_CONTEXT* context, STREAM* s)
int i;
for (i = 0; i < 4; i++)
stream_read_uint32(s, context->nsc_stream->PlaneByteCount[i]);
stream_read_uint32(s, context->nsc_stream.PlaneByteCount[i]);
stream_read_uint8(s, context->nsc_stream->colorLossLevel);
stream_read_uint8(s, context->nsc_stream->ChromaSubSamplingLevel);
stream_read_uint8(s, context->nsc_stream.ColorLossLevel);
stream_read_uint8(s, context->nsc_stream.ChromaSubSamplingLevel);
stream_seek(s, 2);
if (context->nsc_stream->pdata == NULL)
context->nsc_stream->pdata = stream_new(0);
stream_attach(context->nsc_stream->pdata, s->p, BYTESUM(context->nsc_stream->PlaneByteCount));
context->nsc_stream.Planes = stream_get_tail(s);
}
static void nsc_context_initialize(NSC_CONTEXT* context, STREAM* s)
@ -327,7 +328,7 @@ static void nsc_context_initialize(NSC_CONTEXT* context, STREAM* s)
for (i = 0; i < 4; i++)
context->OrgByteCount[i]=context->width * context->height;
if (context->nsc_stream->ChromaSubSamplingLevel > 0) /* [MS-RDPNSC] 2.2 */
if (context->nsc_stream.ChromaSubSamplingLevel > 0) /* [MS-RDPNSC] 2.2 */
{
uint32 tempWidth,tempHeight;
tempWidth = ROUND_UP_TO(context->width, 8);
@ -351,7 +352,6 @@ static void nsc_context_initialize(NSC_CONTEXT* context, STREAM* s)
void nsc_context_free(NSC_CONTEXT* context)
{
stream_detach(context->nsc_stream->pdata);
if (context->bmpdata)
xfree(context->bmpdata);
xfree(context);
@ -360,8 +360,9 @@ void nsc_context_free(NSC_CONTEXT* context)
NSC_CONTEXT* nsc_context_new(void)
{
NSC_CONTEXT* nsc_context;
nsc_context = xnew(NSC_CONTEXT);
nsc_context->nsc_stream = xnew(NSC_STREAM);
return nsc_context;
}
@ -385,7 +386,7 @@ void nsc_process_message(NSC_CONTEXT* context, uint16 bpp,
nsc_colorloss_recover(context);
/* Chroma supersample */
if (context->nsc_stream->ChromaSubSamplingLevel > 0)
if (context->nsc_stream.ChromaSubSamplingLevel > 0)
nsc_chroma_supersample(context);
/* YCoCg to RGB Convert */