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📄 output.c

📁 MPEG-4编解码的实现(包括MPEG4视音频编解码)
💻 C
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123 
	"movd (%0), %%mm0;\n"          /* Load y   0x00000000000000yy */
	"psubsw mpeg3_MMX_601_Y_DIFF, %%mm0;\n"      /* Subtract 16 from y */
	"movd (%1), %%mm1;\n"          /* Load v    0x00000000000000vv */
	"movq %%mm0, %%mm3;\n"         /* Copy y to temp */
	"psllq $16, %%mm1;\n"          /* Shift v   0x0000000000vv0000 */
	"movd (%2), %%mm2;\n"          /* Load u    0x00000000000000uu */
	"psllq $16, %%mm3;\n"          /* Shift y */
	"movq %%mm1, %%mm4;\n"         /* Copy v to temp */
	"por %%mm3, %%mm0;\n"          /* Overlay new y byte 0x0000000000yy00yy */
	"psllq $16, %%mm4;\n"          /* Shift v */
	"movq %%mm2, %%mm5;\n"         /* Copy u to temp */
	"psllq $16, %%mm3;\n"          /* Shift y  */
	"por %%mm4, %%mm1;\n"          /* Overlay new v byte 0x000000vv00vv0000 */
	"psllq $16, %%mm5;\n"          /* Shift u  */
	"por %%mm3, %%mm0;\n"          /* Overlay new y byte 0x000000yy00yy00yy */
	"por %%mm5, %%mm2;\n"          /* Overlay new u byte 0x0000000000uu00uu */

/* mm0: 0x000000yy00yy00yy     mm1: 0x000000vv00vv0000     mm2: 0x0000000000uu00uu */
	"pmullw mpeg3_MMX_601_Y_COEF, %%mm0;\n"     /* Scale y coeffs */
 	"psubw mpeg3_MMX_V_80_RGB, %%mm1;\n"    /* Subtract 128 from v 0x000000vv00vv0000 */
 	"pmullw mpeg3_MMX_V_COEF_RGB, %%mm1;\n" /* Multiply v coeffs 0x0000vvvvvvvv0000 */
 	"psubw mpeg3_MMX_U_80_RGB, %%mm2;\n"    /* Subtract 128 from u 0x0000000000uu00uu */
 	"pmullw mpeg3_MMX_U_COEF_RGB, %%mm2;\n" /* Multiply u coeffs 0x0000uuuuuuuuuuuu */

/* mm0: 0x000000yy00yy00yy mm1: 0x0000vvvvvvvv0000 mm2: 0x00000000uuuuuuuu */
	"paddsw %%mm1, %%mm0;\n"        /* Add v to result */
	"paddsw %%mm2, %%mm0;\n"        /* Add u to result 0x0000bbbbggggrrrr */
	"psraw $6, %%mm0;\n"           /* Demote precision */
	"packuswb %%mm0, %%mm0;\n"     /* Pack into RGBA 0x0000000000bbggrr */
	"movd %%mm0, (%3);\n"          /* Store output */
:
: "r" (&y), "r" (&v), "r" (&u), "r" (output));
}

#endif

#define DITHER_ROW_HEAD \
	for(h = 0; h < video->out_h; h++) \
	{ \
		y_in = &src[0][(video->y_table[h] + video->in_y) * \
			video->coded_picture_width] + \
			video->in_x; \
		if(video->chroma_format == CHROMA420) \
		{ \
			cb_in = &src[1][((video->y_table[h] + video->in_y) >> 1) * \
				video->chrom_width] + \
				(video->in_x >> 1); \
			cr_in = &src[2][((video->y_table[h] + video->in_y) >> 1) * \
				video->chrom_width] + \
				(video->in_x >> 1); \
		} \
		else \
		{ \
			cb_in = &src[1][(video->y_table[h] + video->in_y) * \
				video->chrom_width] + \
				(video->in_x >> 1); \
			cr_in = &src[2][(video->y_table[h] + video->in_y) * \
				video->chrom_width] + \
				(video->in_x >> 1); \
		} \
		data = output_rows[h];

#define DITHER_ROW_TAIL \
	}

#define DITHER_SCALE_HEAD \
	for(w = 0; w < video->out_w; w++) \
	{ \
		uv_subscript = video->x_table[w] / 2; \
		y_l = y_in[video->x_table[w]]; \
		y_l <<= 16; \
		r_l = (y_l + video->cr_to_r[cr_in[uv_subscript]]) >> 16; \
		g_l = (y_l + video->cr_to_g[cr_in[uv_subscript]] + video->cb_to_g[cb_in[uv_subscript]]) >> 16; \
		b_l = (y_l + video->cb_to_b[cb_in[uv_subscript]]) >> 16;

#define DITHER_SCALE_601_HEAD \
	for(w = 0; w < video->out_w; w++) \
	{ \
		uv_subscript = video->x_table[w] / 2; \
		y_l = mpeg3_601_to_rgb[y_in[video->x_table[w]]]; \
		y_l <<= 16; \
		r_l = (y_l + video->cr_to_r[cr_in[uv_subscript]]) >> 16; \
		g_l = (y_l + video->cr_to_g[cr_in[uv_subscript]] + video->cb_to_g[cb_in[uv_subscript]]) >> 16; \
		b_l = (y_l + video->cb_to_b[cb_in[uv_subscript]]) >> 16;

#define DITHER_SCALE_TAIL \
	}

#define DITHER_MMX_SCALE_HEAD \
	for(w = 0; w < video->out_w; w++) \
	{ \
		uv_subscript = video->x_table[w] / 2;

#define DITHER_MMX_SCALE_TAIL \
		data += step; \
	}

#define DITHER_MMX_HEAD \
	for(w = 0; w < video->out_w; w += 2) \
	{

#define DITHER_MMX_TAIL \
		data += step; \
        cr_in++; \
        cb_in++; \
	}

#define DITHER_HEAD \
    for(w = 0; w < video->horizontal_size; w++) \
	{ \
		y_l = *y_in++; \
		y_l <<= 16; \
		r_l = (y_l + video->cr_to_r[*cr_in]) >> 16; \
		g_l = (y_l + video->cr_to_g[*cr_in] + video->cb_to_g[*cb_in]) >> 16; \
		b_l = (y_l + video->cb_to_b[*cb_in]) >> 16;

#define DITHER_601_HEAD \
    for(w = 0; w < video->horizontal_size; w++) \
	{ \
		y_l = mpeg3_601_to_rgb[*y_in++]; \
		y_l <<= 16; \
		r_l = (y_l + video->cr_to_r[*cr_in]) >> 16; \
		g_l = (y_l + video->cr_to_g[*cr_in] + video->cb_to_g[*cb_in]) >> 16; \
		b_l = (y_l + video->cb_to_b[*cb_in]) >> 16;

#define DITHER_TAIL \
    	if(w & 1) \
		{ \
        	cr_in++; \
        	cb_in++; \
    	} \
    }


#define STORE_PIXEL_BGR888 \
	*data++ = CLIP(b_l); \
	*data++ = CLIP(g_l); \
	*data++ = CLIP(r_l);

#define STORE_PIXEL_BGRA8888 \
	*data++ = CLIP(b_l); \
	*data++ = CLIP(g_l); \
	*data++ = CLIP(r_l); \
	*data++ = 0;

#define STORE_PIXEL_RGB565 \
	*((unsigned short*)data)++ = \
		((CLIP(r_l) & 0xf8) << 8) | \
		((CLIP(g_l) & 0xfc) << 3) | \
		((CLIP(b_l) & 0xf8) >> 3);

#define STORE_PIXEL_RGB888 \
	*data++ = CLIP(r_l); \
	*data++ = CLIP(g_l); \
	*data++ = CLIP(b_l);

#define STORE_PIXEL_RGBA8888 \
	*data++ = CLIP(r_l); \
	*data++ = CLIP(g_l); \
	*data++ = CLIP(b_l); \
	*data++ = 0;

#define STORE_PIXEL_RGBA16161616 \
	*data_s++ = CLIP(r_l); \
	*data_s++ = CLIP(g_l); \
	*data_s++ = CLIP(b_l); \
	*data_s++ = 0;



/* Only good for YUV 4:2:0 */
int mpeg3video_ditherframe(mpeg3video_t *video, 
	unsigned char **src, 
	unsigned char **output_rows)
{
	int h = 0;
	register unsigned char *y_in, *cb_in, *cr_in;
	long y_l, r_l, b_l, g_l;
	register unsigned char *data;
	register int uv_subscript, step, w = -1;



#ifdef HAVE_MMX
/* =================================== MMX ===================================== */
	if(/* video->have_mmx */ 1 &&
		video->out_w == video->horizontal_size &&
		video->out_h == video->vertical_size &&
		video->in_w == video->out_w &&
		video->in_h == video->out_h &&
		video->in_x == 0 &&
		video->in_y == 0 &&
		(video->color_model == MPEG3_RGB565 || 
			video->color_model == MPEG3_601_RGB565) && 
		video->chroma_format == CHROMA420)
	{
/* Unscaled 16 bit from NIST */
		mpeg3video_rgb16_mmx(src[0], 
			src[2], 
			src[1], 
			output_rows[0], 
			video->out_h, 
			video->out_w, 
			(output_rows[1] - output_rows[0]) / 2 - video->out_w);
	}
	else
	if(/* video->have_mmx */ 1 && 
		(video->color_model == MPEG3_BGRA8888 || 
		video->color_model == MPEG3_BGR888 ||
/*		video->color_model == MPEG3_RGB888 || */
		video->color_model == MPEG3_RGBA8888 ||
		video->color_model == MPEG3_601_BGR888 ||
		video->color_model == MPEG3_601_BGRA8888 ||
		video->color_model == MPEG3_601_RGB888 ||
		video->color_model == MPEG3_601_RGBA8888))
	{
/* Original MMX */
		if(video->color_model == MPEG3_BGRA8888 ||
			video->color_model == MPEG3_RGBA8888 ||
			video->color_model == MPEG3_601_BGRA8888 ||
			video->color_model == MPEG3_601_RGBA8888) step = 4;
		else
		if(video->color_model == MPEG3_BGR888 ||
			video->color_model == MPEG3_RGB888 ||
			video->color_model == MPEG3_601_BGR888 ||
			video->color_model == MPEG3_601_RGB888) step = 3;

		DITHER_ROW_HEAD
/* Transfer row with scaling */
			if(video->out_w != video->horizontal_size)
			{
				switch(video->color_model)
				{
					case MPEG3_BGRA8888:
					case MPEG3_BGR888:
						DITHER_MMX_SCALE_HEAD
							mpeg3_bgra32_mmx(y_in[video->x_table[w]], 
								cr_in[uv_subscript], 
								cb_in[uv_subscript], 
								(unsigned long*)data);
						DITHER_MMX_SCALE_TAIL
						break;
					
					case MPEG3_601_BGRA8888:
					case MPEG3_601_BGR888:
						DITHER_MMX_SCALE_HEAD
							mpeg3_601_bgra32_mmx(y_in[video->x_table[w]], 
								cr_in[uv_subscript], 
								cb_in[uv_subscript], 
								(unsigned long*)data);
						DITHER_MMX_SCALE_TAIL
						break;

					case MPEG3_RGBA8888:
					case MPEG3_RGB888:
						DITHER_MMX_SCALE_HEAD
							mpeg3_rgba32_mmx(y_in[video->x_table[w]], 
								cr_in[uv_subscript], 
								cb_in[uv_subscript], 
								(unsigned long*)data);
						DITHER_MMX_SCALE_TAIL
						break;

					case MPEG3_601_RGBA8888:
					case MPEG3_601_RGB888:
						DITHER_MMX_SCALE_HEAD
							mpeg3_601_rgba32_mmx(y_in[video->x_table[w]], 
								cr_in[uv_subscript], 
								cb_in[uv_subscript], 
								(unsigned long*)data);
						DITHER_MMX_SCALE_TAIL
						break;
				}
			}
			else
/* Transfer row unscaled */
			{
				switch(video->color_model)
				{
/* MMX byte swap 24 and 32 bit */
					case MPEG3_BGRA8888:
					case MPEG3_BGR888:
						DITHER_MMX_HEAD
							mpeg3_bgra32_mmx(*y_in++, 
								*cr_in, 
								*cb_in, 
								(unsigned long*)data);
							data += step;
							mpeg3_bgra32_mmx(*y_in++, 
								*cr_in, 
								*cb_in, 
								(unsigned long*)data);
						DITHER_MMX_TAIL
						break;

/* MMX 601 byte swap 24 and 32 bit */
					case MPEG3_601_BGRA8888:
					case MPEG3_601_BGR888:
						DITHER_MMX_HEAD
							mpeg3_601_bgra32_mmx(*y_in++, 
								*cr_in, 
								*cb_in, 
								(unsigned long*)data);
							data += step;
							mpeg3_601_bgra32_mmx(*y_in++, 
								*cr_in, 
								*cb_in, 
								(unsigned long*)data);
						DITHER_MMX_TAIL
						break;

/* MMX 24 and 32 bit no byte swap */
					case MPEG3_RGBA8888:
					case MPEG3_RGB888:
						DITHER_MMX_HEAD
							mpeg3_rgba32_mmx(*y_in++, 
								*cr_in, 
								*cb_in, 
								(unsigned long*)data);
							data += step;
							mpeg3_rgba32_mmx(*y_in++, 
								*cr_in, 
								*cb_in, 
								(unsigned long*)data);
						DITHER_MMX_TAIL
						break;

/* MMX 601 24 and 32 bit no byte swap */
					case MPEG3_601_RGBA8888:
					case MPEG3_601_RGB888:
						DITHER_MMX_HEAD
							mpeg3_601_rgba32_mmx(*y_in++, 
								*cr_in, 
								*cb_in, 
								(unsigned long*)data);
							data += step;
							mpeg3_601_rgba32_mmx(*y_in++, 
								*cr_in, 
								*cb_in, 
								(unsigned long*)data);
						DITHER_MMX_TAIL
						break;
				}
			}
		DITHER_ROW_TAIL
	}
	else
#endif
/* ================================== NO MMX ==================================== */
	{
		DITHER_ROW_HEAD
/* Transfer row with scaling */
			if(video->out_w != video->horizontal_size)
			{
				switch(video->color_model)
				{
					case MPEG3_BGR888:
123

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