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added paletted 8 bit format support

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Originally committed as revision 1560 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Fabrice Bellard 2003-02-09 16:20:25 +00:00
parent f70f7c6db2
commit 7e6d70d0b1
2 changed files with 122 additions and 2 deletions
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5
libavcodec/avcodec.h
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@ -16,8 +16,8 @@ extern "C" {
#define LIBAVCODEC_VERSION_INT 0x000406
#define LIBAVCODEC_VERSION "0.4.6"
#define LIBAVCODEC_BUILD 4655
#define LIBAVCODEC_BUILD_STR "4655"
#define LIBAVCODEC_BUILD 4656
#define LIBAVCODEC_BUILD_STR "4656"
enum CodecID {
CODEC_ID_NONE,
@ -86,6 +86,7 @@ enum PixelFormat {
PIX_FMT_GRAY8,
PIX_FMT_MONOWHITE, /* 0 is white */
PIX_FMT_MONOBLACK, /* 0 is black */
PIX_FMT_PAL8, /* 8 bit with RGBA palette */
PIX_FMT_NB,
};

119
libavcodec/imgconvert.c
View File

@ -108,6 +108,12 @@ static PixFmtInfo pix_fmt_info[PIX_FMT_NB] = {
.name = "monob",
.nb_components = 1, .is_packed = 1, .is_gray = 1,
},
/* paletted formats */
[PIX_FMT_PAL8] = {
.name = "pal8",
.nb_components = 1, .is_packed = 1, .is_paletted = 1,
},
};
void avcodec_get_chroma_sub_sample(int pix_fmt, int *h_shift, int *v_shift)
@ -188,10 +194,19 @@ int avpicture_fill(AVPicture *picture, UINT8 *ptr,
picture->data[2] = NULL;
picture->linesize[0] = (width + 7) >> 3;
return picture->linesize[0] * height;
case PIX_FMT_PAL8:
size2 = (size + 3) & ~3;
picture->data[0] = ptr;
picture->data[1] = ptr + size2; /* palette is stored here as 256 32 bit words */
picture->data[2] = NULL;
picture->linesize[0] = width;
picture->linesize[1] = 4;
return size2 + 256 * 4;
default:
picture->data[0] = NULL;
picture->data[1] = NULL;
picture->data[2] = NULL;
picture->data[3] = NULL;
return -1;
}
}
@ -678,6 +693,38 @@ static void gray_to_ ## rgb_name(AVPicture *dst, AVPicture *src, \
p += src_wrap; \
q += dst_wrap; \
} \
} \
\
static void pal8_to_ ## rgb_name(AVPicture *dst, AVPicture *src, \
int width, int height) \
{ \
const unsigned char *p; \
unsigned char *q; \
int r, g, b, dst_wrap, src_wrap; \
int x, y; \
uint32_t v;\
const uint32_t *palette;\
\
p = src->data[0]; \
src_wrap = src->linesize[0] - width; \
palette = (uint32_t *)src->data[1];\
\
q = dst->data[0]; \
dst_wrap = dst->linesize[0] - BPP * width; \
\
for(y=0;y<height;y++) { \
for(x=0;x<width;x++) { \
v = palette[p[0]];\
r = (v >> 16) & 0xff;\
g = (v >> 8) & 0xff;\
b = (v) & 0xff;\
RGB_OUT(q, r, g, b); \
q += BPP; \
p ++; \
} \
p += src_wrap; \
q += dst_wrap; \
} \
}
/* copy bit n to bits 0 ... n - 1 */
@ -977,6 +1024,58 @@ static void gray_to_monoblack(AVPicture *dst, AVPicture *src,
gray_to_mono(dst, src, width, height, 0x00);
}
/* this is maybe slow, but allows for extensions */
static inline unsigned char gif_clut_index(UINT8 r, UINT8 g, UINT8 b)
{
return ((((r)/47)%6)*6*6+(((g)/47)%6)*6+(((b)/47)%6));
}
/* XXX: put jpeg quantize code instead */
static void rgb24_to_pal8(AVPicture *dst, AVPicture *src,
int width, int height)
{
const unsigned char *p;
unsigned char *q;
int r, g, b, dst_wrap, src_wrap;
int x, y, i;
static const uint8_t pal_value[6] = { 0x00, 0x33, 0x66, 0x99, 0xcc, 0xff };
uint32_t *pal;
p = src->data[0];
src_wrap = src->linesize[0] - 3 * width;
q = dst->data[0];
dst_wrap = dst->linesize[0] - width;
for(y=0;y<height;y++) {
for(x=0;x<width;x++) {
r = p[0];
g = p[1];
b = p[2];
q[0] = gif_clut_index(r, g, b);
q++;
p += 3;
}
p += src_wrap;
q += dst_wrap;
}
/* build palette */
pal = (uint32_t *)dst->data[1];
i = 0;
for(r = 0; r < 6; r++) {
for(g = 0; g < 6; g++) {
for(b = 0; b < 6; b++) {
pal[i++] = (0xff << 24) | (pal_value[r] << 16) |
(pal_value[g] << 8) | pal_value[b];
}
}
}
while (i < 256)
pal[i++] = 0;
}
typedef struct ConvertEntry {
void (*convert)(AVPicture *dst, AVPicture *src, int width, int height);
} ConvertEntry;
@ -1039,6 +1138,9 @@ static ConvertEntry convert_table[PIX_FMT_NB][PIX_FMT_NB] = {
[PIX_FMT_GRAY8] = {
.convert = rgb24_to_gray
},
[PIX_FMT_PAL8] = {
.convert = rgb24_to_pal8
},
},
[PIX_FMT_RGBA32] = {
[PIX_FMT_YUV420P] = {
@ -1105,6 +1207,23 @@ static ConvertEntry convert_table[PIX_FMT_NB][PIX_FMT_NB] = {
.convert = monoblack_to_gray
},
},
[PIX_FMT_PAL8] = {
[PIX_FMT_RGB555] = {
.convert = pal8_to_rgb555
},
[PIX_FMT_RGB565] = {
.convert = pal8_to_rgb565
},
[PIX_FMT_BGR24] = {
.convert = pal8_to_bgr24
},
[PIX_FMT_RGB24] = {
.convert = pal8_to_rgb24
},
[PIX_FMT_RGBA32] = {
.convert = pal8_to_rgba32
},
},
};
static int avpicture_alloc(AVPicture *picture,