/*
 *  libzvbi test
 *
 *  Copyright (C) 2004 Michael H. Schimek
 *
 *  This program is free software; you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License as published by
 *  the Free Software Foundation; either version 2 of the License, or
 *  (at your option) any later version.
 *
 *  This program is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *  GNU General Public License for more details.
 *
 *  You should have received a copy of the GNU General Public License
 *  along with this program; if not, write to the Free Software
 *  Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
 */

/* $Id: raw_decoder.c,v 1.10 2006/05/28 20:16:29 mschimek Exp $ */

/* Automated test of the vbi_raw_decoder. */

#include <stdlib.h>
#include <string.h>
#include <assert.h>

#include "src/raw_decoder.h"
#include "src/io-sim.h"

#define N_ELEMENTS(array) (sizeof (array) / sizeof (*(array)))

vbi_bool verbose;

typedef struct {
	unsigned int		service;
	unsigned int		first;
	unsigned int		last;
} block;

#define BLOCK_END { 0, 0, 0 }

static void *
memset_rand			(void *			d1,
				 size_t			n)
{
	uint8_t *d = (uint8_t *) d1;

	while (n-- > 0)
		*d++ = rand ();

	return d1;
}

static void *
xmemdup				(const void *		s,
				 size_t			n)
{
	void *d;

	d = malloc (n);
	assert (NULL != d);
	memcpy (d, s, n);

	return d;
}

static void
dump_hex			(const uint8_t *	p,
				 unsigned int 		n)
{
	while (n-- > 0)
		fprintf (stderr, "%02x ", *p++);
}

static void
sliced_rand_lines		(const vbi_sliced *	s_start,
				 const vbi_sliced *	s_end,
				 vbi_sliced *		s,
				 unsigned int		service,
				 unsigned int		first_line,
				 unsigned int		last_line)
{
	unsigned int line;

	for (line = first_line; line <= last_line; ++line) {
		const vbi_sliced *t;

		assert (s < s_end);

		for (t = s_start; t < s; ++t)
			assert (t->line != line);

		s->id = service;
		s->line = line;

		memset_rand (s->data, sizeof (s->data));

		++s;
	}
}

static unsigned int
sliced_rand			(vbi_sliced *		s,
				 unsigned int		s_lines,
				 const block *		b)
{
	const vbi_sliced *s_start;
	unsigned int services;

	s_start = s;
	services = 0;

	while (b->service) {
		services |= b->service;

		if (b->first > 0) {
			sliced_rand_lines (s_start, s_start + s_lines, s,
					   b->service, b->first, b->last);

			s += b->last - b->first + 1;
		}

		++b;
	}

	if (0)
		fprintf (stderr, "services 0x%08x\n", services);

	return s - s_start;
}

static unsigned int
create_raw			(uint8_t **		raw,
				 vbi_sliced **		sliced,
				 const vbi_sampling_par *sp,
				 const block *		b,
				 unsigned int		pixel_mask)
{
	unsigned int scan_lines;
	unsigned int sliced_lines;
	unsigned int raw_size;

	scan_lines = sp->count[0] + sp->count[1];
	raw_size = sp->bytes_per_line * scan_lines;

	*raw = (uint8_t *) malloc (raw_size);
	assert (NULL != *raw);

	*sliced = (vbi_sliced *) malloc (sizeof (**sliced) * 50);
	assert (NULL != *sliced);

	sliced_lines = sliced_rand (*sliced, 50, b);

	if (pixel_mask) {
		memset_rand (*raw, raw_size);

		assert (vbi_raw_video_image (*raw, raw_size, sp,
					     /* blank_level: default */ 0,
					     /* black_level: default */ 0,
					     /* white_level: default */ 0,
					     pixel_mask,
					     /* swap_fields */ FALSE,
					     *sliced, sliced_lines));
	} else {
		assert (vbi_raw_vbi_image (*raw, raw_size, sp,
					   /* blank_level: default */ 0,
					   /* white_level: default */ 0,
					   /* swap_fields */ FALSE,
					   *sliced, sliced_lines));
	}

	return sliced_lines;
}

static vbi3_raw_decoder *
create_decoder			(const vbi_sampling_par *sp,
				 const block *		b,
				 unsigned int		strict)
{
	vbi3_raw_decoder *rd;
	unsigned int in_services;
	unsigned int out_services;

	in_services = 0;

	while (b->service) {
		in_services |= b->service;
		++b;
	}

	rd = vbi3_raw_decoder_new (sp);
	assert (NULL != rd);

	if (sp->synchronous) {
		vbi3_raw_decoder_set_log_fn
			(rd,
			 vbi_log_on_stderr,
			 /* user_data */ NULL,
			 /* max_level */ VBI_LOG_INFO * 2 - 1);
	} else {
		/* Don't complain about expected failures.
		   XXX Check for those in a different function. */
	}

	out_services = vbi3_raw_decoder_add_services (rd, in_services, strict);

	if (!sp->synchronous) {
		/* Ambiguous. */
		in_services &= ~(VBI_SLICED_VPS |
				 VBI_SLICED_VPS_F2 |
				 VBI_SLICED_WSS_625 |
				 VBI_SLICED_CAPTION_625 |
				 VBI_SLICED_CAPTION_525);
	}

	assert (in_services == out_services);

	return rd;
}

static void
compare_payload			(const vbi_sliced *	in,
				 const vbi_sliced *	out)
{
	unsigned int payload;

	payload = vbi_sliced_payload_bits (out->id);
	assert (0 == memcmp (in->data, out->data, payload >> 3));

	if (payload & 7) {
		unsigned int mask = (1 << (payload & 7)) - 1;

		payload = (payload >> 3);

		/* MSBs zero, rest as sent */
		assert (0 == ((in->data[payload] & mask)
			      ^ out->data[payload]));
	}
}

static void
compare_sliced			(const vbi_sampling_par *sp,
				 const vbi_sliced *	in,
				 const vbi_sliced *	out,
				 const vbi_sliced *	old,
				 unsigned int		in_lines,
				 unsigned int		out_lines,
				 unsigned int		old_lines)
{
	unsigned int i;
	unsigned int min;
	unsigned int id;
	vbi_sliced *in1;
	vbi_sliced *s;

	min = 0;

	for (i = 0; i < out_lines; ++i) {
		unsigned int payload;

		if (sp->synchronous) {
			/* Ascending line numbers. */
			assert (out[i].line > min);
			min = out[i].line;
		} else {
			/* Could be first or second field,
			   we don't know. */
			assert (0 == out[i].line);
		}

		/* Valid service id. */
		assert (0 != out[i].id);
		payload = (vbi_sliced_payload_bits (out[i].id) + 7) >> 3;
		assert (payload > 0);

		/* vbi_sliced big enough. */
		assert (payload <= sizeof (out[i].data));

		/* Writes more than payload. */
		assert (0 == memcmp (out[i].data + payload,
				     old[i].data + payload,
				     sizeof (out[i].data) - payload));
	}

	/* Respects limits. */
	assert (0 == memcmp (out + out_lines,
			     old + out_lines,
			     sizeof (*old) * (old_lines - out_lines)));

	in1 = xmemdup (in, sizeof (*in) * in_lines);

	for (i = 0; i < out_lines; ++i) {
		if (sp->synchronous) {
			for (s = in1; s < in1 + in_lines; ++s)
				if (s->line == out[i].line)
					break;

			/* Found something we didn't send. */
			assert (s < in1 + in_lines);

			/* Identified as something else. */
			/* fprintf (stderr, "%3u id %08x %08x\n", s->line, s->id, out[i].id); */
			assert (s->id == out[i].id);
		} else {
			/* fprintf (stderr, "%08x ", out[i].id); */

			/* No line numbers, but data must be in
			   same order. */
			for (s = in1; s < in1 + in_lines; ++s)
				if (s->id == out[i].id)
					break;
			
			assert (s < in1 + in_lines);

			/* fprintf (stderr, "from line %3u\n", s->line); */
		}

		compare_payload (s, &out[i]);

		s->id = 0;
	}

	id = 0;
	for (s = in1; s < in1 + in_lines; ++s)
		id |= s->id;

	if (!sp->synchronous) {
		/* Ok these are ambiguous. */
		id &= ~(VBI_SLICED_VPS |
			VBI_SLICED_VPS_F2 |
			VBI_SLICED_WSS_625 |
			VBI_SLICED_CAPTION_625 |
			VBI_SLICED_CAPTION_525);
	}

	/* Anything missed? */
	assert (0 == id);

	free (in1);
	in1 = NULL;
}

static void
test_cycle			(const vbi_sampling_par *sp,
				 const block *		b,
				 unsigned int		pixel_mask,
				 unsigned int		strict)
{
	vbi_sliced *in;
	vbi_sliced out[50];
	vbi_sliced old[50];
	uint8_t *raw;
	vbi3_raw_decoder *rd;
	unsigned int in_lines;
	unsigned int out_lines;

	in_lines = create_raw (&raw, &in, sp, b, pixel_mask);

	if (0 && verbose)
		dump_hex (raw + 120, 12);

	rd = create_decoder (sp, b, strict);

	memset_rand (out, sizeof (out));
	memcpy (old, out, sizeof (old));

	out_lines = vbi3_raw_decoder_decode (rd, out, 40, raw);

	if (verbose)
		fprintf (stderr, "%s %d in=%u out=%u\n",
			 __FUNCTION__,
			 (sp->sampling_format),
			 in_lines, out_lines);

	if (sp->synchronous)
		assert (in_lines == out_lines);

	compare_sliced (sp, in, out, old, in_lines, out_lines, 50);

	free (in);
	free (raw);
}

static void
test_vbi			(const vbi_sampling_par *sp,
				 const block *		b,
				 unsigned int		strict)
{
	test_cycle (sp, b, 0, strict);
}

static void
test_video			(const vbi_sampling_par *sp,
				 const block *		b,
				 unsigned int		strict)
{
	vbi_sampling_par sp2;
	unsigned int pixel_mask;
	vbi_pixfmt pixfmt;
	unsigned int samples_per_line;

	sp2 = *sp;
	samples_per_line = sp->bytes_per_line
		/ VBI_PIXFMT_BPP (sp->sampling_format);

	for (pixfmt = (vbi_pixfmt) 0; pixfmt < VBI_MAX_PIXFMTS;
	     pixfmt = (vbi_pixfmt)(pixfmt + 1)) {
		if (0 == (VBI_PIXFMT_SET_ALL & VBI_PIXFMT_SET (pixfmt)))
			continue;

		sp2.sampling_format = pixfmt;
		sp2.bytes_per_line = samples_per_line
			* VBI_PIXFMT_BPP (pixfmt);

		/* Check bit slicer looks at Y/G */
		if (VBI_PIXFMT_SET (pixfmt) & VBI_PIXFMT_SET_YUV)
			pixel_mask = 0xFF;
		else
			pixel_mask = 0xFF00;

		test_cycle (&sp2, b, pixel_mask, strict);
	}
}

static const block ttx_a [] = {
	{ VBI_SLICED_TELETEXT_A,	6, 22 },
	{ VBI_SLICED_TELETEXT_A,	318, 335 },
	BLOCK_END,
};

static const block ttx_c_625 [] = {
	{ VBI_SLICED_TELETEXT_C_625,	6, 22 },
	{ VBI_SLICED_TELETEXT_C_625,	318, 335 },
	BLOCK_END,
};

static const block ttx_d_625 [] = {
	{ VBI_SLICED_TELETEXT_D_625,	6, 22 },
	{ VBI_SLICED_TELETEXT_D_625,	318, 335 },
	BLOCK_END,
};

static const block hi_625 [] = {
	{ VBI_SLICED_TELETEXT_B_625,	6, 21 },
	{ VBI_SLICED_CAPTION_625,	22, 22 },
	{ VBI_SLICED_WSS_625,		23, 23 },
	{ VBI_SLICED_TELETEXT_B_625,	318, 334 },
	{ VBI_SLICED_CAPTION_625,	335, 335 },
	BLOCK_END,
};

static const block hi_f1_625 [] = {
	{ VBI_SLICED_VPS,		16, 16 },
	{ VBI_SLICED_CAPTION_625_F1,	22, 22 },
	{ VBI_SLICED_WSS_625,		23, 23 },
	BLOCK_END,
};

static const block hi_f2_525 [] = {
	{ VBI_SLICED_CAPTION_525_F2,	284, 284 },
	BLOCK_END,
};

static const block low_625 [] = {
	{ VBI_SLICED_VPS,		16, 16 },
	{ VBI_SLICED_CAPTION_625,	22, 22 },
	{ VBI_SLICED_WSS_625,		23, 23 },
	{ VBI_SLICED_CAPTION_625,	335, 335 },
	BLOCK_END,
};

static const block cc_625 [] = {
	{ VBI_SLICED_CAPTION_625,	22, 22 },
	{ VBI_SLICED_CAPTION_625,	335, 335 },
	BLOCK_END,
};

static const block ttx_c_525 [] = {
	{ VBI_SLICED_TELETEXT_C_525,	10, 21 },
	{ VBI_SLICED_TELETEXT_C_525,	272, 284 },
	BLOCK_END,
};

static const block ttx_d_525 [] = {
	{ VBI_SLICED_TELETEXT_D_525,	10, 21 },
	{ VBI_SLICED_TELETEXT_D_525,	272, 284 },
	BLOCK_END,
};

static const block hi_525 [] = {
	{ VBI_SLICED_TELETEXT_B_525,	10, 20 },
	{ VBI_SLICED_CAPTION_525,	21, 21 },
	{ VBI_SLICED_TELETEXT_B_525,	272, 283 },
	{ VBI_SLICED_CAPTION_525,	284, 284 },
	BLOCK_END,
};

static const block low_525 [] = {
	{ VBI_SLICED_CAPTION_525,	21, 21 },
	{ VBI_SLICED_CAPTION_525,	284, 284 },
	BLOCK_END,
};

static void
test2				(const vbi_sampling_par *sp)
{
	if (625 == sp->scanning) {
		if (sp->sampling_rate >= 13500000) {
			vbi_sampling_par sp1;

			/* We cannot mix Teletext standards; bit rate and
			   FRC are too similar to reliable distinguish. */
			test_vbi (sp, ttx_a, 1);
			test_vbi (sp, ttx_c_625, 1);

			/* Needs sampling beyond 0H + 63 us (?) */
			if (sp->bytes_per_line
			    == 2048 * VBI_PIXFMT_BPP (sp->sampling_format))
				test_vbi (sp, ttx_d_625, 1);

			test_vbi (sp, hi_625, 1);
			test_video (sp, hi_625, 1);

			if (!sp->interlaced) {
				sp1 = *sp;
				sp1.start[1] = 0;
				sp1.count[1] = 0;
				test_vbi (&sp1, hi_f1_625, 2);
			}
		} else if (sp->sampling_rate >= 5000000) {
			test_vbi (sp, low_625, 1);
			test_video (sp, low_625, 1);
		} else {
			/* WSS not possible below 5 MHz due to a cri_rate
			   check in bit_slicer_init(), but much less won't
			   work anyway. */
			test_vbi (sp, cc_625, 1);
			test_video (sp, cc_625, 1);
		}
	} else {
		if (sp->sampling_rate >= 13500000) {
			vbi_sampling_par sp1;

			test_vbi (sp, ttx_c_525, 1);
			test_vbi (sp, ttx_d_525, 1);

			test_vbi (sp, hi_525, 1);
			test_video (sp, hi_525, 1);

			if (!sp->interlaced) {
				sp1 = *sp;
				sp1.start[0] = 0;
				sp1.count[0] = 0;
				test_vbi (&sp1, hi_f2_525, 2);
			}
		} else {
			test_vbi (sp, low_525, 1);
			test_video (sp, low_525, 1);
		}
	}
}

static void
test1				(const vbi_sampling_par *sp)
{
	static const struct {
		unsigned int	sampling_rate;
		unsigned int	samples_per_line;
	} res [] = {
		/* bt8x8 PAL		~35.5 MHz / 2048
		   bt8x8 NTSC		~28.6 MHz / 2048
		   PAL 1:1		~14.7 MHz / 768
		   ITU-R BT.601		 13.5 MHz / 720
		   NTSC 1:1		~12.3 MHz / 640 */
		{ 35468950,	2048 },
		{ 27000000,	1440 },
		{ 13500000,	 720 },
		{  3000000,	 176 },
	};
	vbi_sampling_par sp2;
	unsigned int i;

	for (i = 0; i < N_ELEMENTS (res); ++i) {
		if (verbose)
			fprintf (stderr, "%.2f MHz %u spl\n",
				 res[i].sampling_rate / 1e6,
				 res[i].samples_per_line);

		sp2 = *sp;
		sp2.sampling_rate	= res[i].sampling_rate;
		sp2.bytes_per_line	= res[i].samples_per_line
			* VBI_PIXFMT_BPP (sp2.sampling_format);
		sp2.offset		= (int)(9.7e-6 * sp2.sampling_rate);

		test2 (&sp2);
	}
}

static void
test_services			(void)
{
	vbi_sampling_par sp;
	vbi_service_set set;

	memset (&sp, 0x55, sizeof (sp));

	set = vbi_sampling_par_from_services (&sp,
					      /* &max_rate */ NULL,
					      VBI_VIDEOSTD_SET_625_50,
					      ~0 & ~VBI_SLICED_VBI_625);
	assert (set == (VBI_SLICED_TELETEXT_A |
			VBI_SLICED_TELETEXT_B_625 |
			VBI_SLICED_TELETEXT_C_625 |
			VBI_SLICED_TELETEXT_D_625 |
			VBI_SLICED_VPS |
			VBI_SLICED_VPS_F2 |
			VBI_SLICED_CAPTION_625 |
			VBI_SLICED_WSS_625));
	test2 (&sp);

	set = vbi_sampling_par_from_services (&sp,
					      /* &max_rate */ NULL,
					      VBI_VIDEOSTD_SET_525_60,
					      ~0 & ~VBI_SLICED_VBI_525);
	assert (set == (VBI_SLICED_TELETEXT_B_525 |
			VBI_SLICED_TELETEXT_C_525 |
			VBI_SLICED_TELETEXT_D_525 |
			VBI_SLICED_CAPTION_525 |
			VBI_SLICED_2xCAPTION_525
			/* Needs fix */
			/* | VBI_SLICED_WSS_CPR1204 */ ));
	test2 (&sp);
}

static void
test_line_order			(vbi_bool		synchronous)
{
	vbi_sampling_par sp;

	memset (&sp, 0x55, sizeof (sp));

	sp.scanning		= 625;
	sp.sampling_format	= VBI_PIXFMT_YUV420;
	sp.start[0]		= 6;
	sp.count[0]		= 23 - 6 + 1;
	sp.start[1]		= 318;
	sp.count[1]		= 335 - 318 + 1;
	sp.interlaced		= FALSE;
	sp.synchronous		= synchronous;

	test1 (&sp);

	sp.interlaced		= TRUE;

	test1 (&sp);

	sp.scanning		= 525;
	sp.sampling_format	= VBI_PIXFMT_YUV420;
	sp.start[0]		= 10;
	sp.count[0]		= 21 - 10 + 1;
	sp.start[1]		= 272;
	sp.count[1]		= 284 - 272 + 1;
	sp.interlaced		= FALSE;
	sp.synchronous		= synchronous;

	test1 (&sp);
}

int
main				(int			argc,
				 char **		argv)
{
	argc = argc;
	argv = argv;

	verbose = (argc > 1);

	test_services ();
	test_line_order (/* synchronous */ TRUE);
	test_line_order (/* synchronous */ FALSE);

	/* More... */

	exit (EXIT_SUCCESS);

	return 0;
}