summaryrefslogtreecommitdiff
path: root/src/rmd_cache_frame.c
blob: 3a4e9b31a23174e2db0b561a7f4b38a47a23fa94 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
/******************************************************************************
*                            recordMyDesktop                                  *
*******************************************************************************
*                                                                             *
*            Copyright (C) 2006,2007,2008 John Varouhakis                     *
*                                                                             *
*                                                                             *
*   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., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA  *
*                                                                             *
*                                                                             *
*                                                                             *
*   For further information contact me at johnvarouhakis@gmail.com            *
******************************************************************************/

#include "config.h"
#include "rmd_cache_frame.h"

#include "rmd_yuv_utils.h"
#include "rmd_cache.h"
#include "rmd_threads.h"
#include "rmd_types.h"

#include <signal.h>
#include <string.h>
#include <stdio.h>
#include <stdlib.h>
#include <errno.h>
#include <math.h>


#define BYTES_PER_MB          (1024 * 1024)
#define CACHE_OUT_BUFFER_SIZE (4 * 1024)
#define CACHE_FILE_SIZE_LIMIT (500 * 1024 * 1024)


static int rmdFlushBlock(
			unsigned char *buf,
			int blockno,
			int width,
			int height,
			int blockwidth,
			gzFile fp,
			FILE *ucfp,
			int flush)
{

	int	bytes_written = 0,
		block_i = (!blockwidth) ? 0 : (blockno / (width / blockwidth)),//place on the grid
		block_k = (!blockwidth) ? 0 : (blockno % (width / blockwidth));
	register unsigned char *buf_reg = (&buf[(block_i * width + block_k) * blockwidth]);
	static unsigned char out_buffer[CACHE_OUT_BUFFER_SIZE];
	static unsigned int out_buffer_bytes = 0;

	if (out_buffer_bytes + pow(blockwidth, 2) >= CACHE_OUT_BUFFER_SIZE || (flush && out_buffer_bytes)) {
		if (ucfp == NULL)
			gzwrite(fp, (void *)out_buffer, out_buffer_bytes);
		else
			fwrite((void *)out_buffer, 1, out_buffer_bytes, ucfp);

		bytes_written = out_buffer_bytes;
		out_buffer_bytes = 0;
	}

	if (!flush) {
		register unsigned char *out_buf_reg = &out_buffer[out_buffer_bytes];

		for (int j = 0;j < blockwidth; j++) {

			for(int i = 0;i < blockwidth; i++)
				(*out_buf_reg++) = (*buf_reg++);

			out_buffer_bytes += blockwidth;
			buf_reg += width - blockwidth;
		}
	}

	return bytes_written;
}

void *rmdCacheImageBuffer(ProgData *pdata)
{

	gzFile		fp = NULL;
	FILE		*ucfp = NULL;
	int		index_entry_size = sizeof(u_int32_t),
			blocknum_x = pdata->enc_data->yuv.y_width / Y_UNIT_WIDTH,
			blocknum_y = pdata->enc_data->yuv.y_height / Y_UNIT_WIDTH,
			firstrun = 1,
			frameno = 0,
			nbytes = 0,
			nth_cache = 1;
	u_int32_t	ynum, unum, vnum,
			y_short_blocks[blocknum_x * blocknum_y],
			u_short_blocks[blocknum_x * blocknum_y],
			v_short_blocks[blocknum_x * blocknum_y];
	unsigned long long int total_bytes = 0;
	unsigned long long int total_received_bytes = 0;
	unsigned int	capture_frameno = 0;

	rmdThreadsSetName("rmdCacheImages");

	if (!pdata->args.zerocompression) {
		fp = pdata->cache_data->ifp;

		if (fp == NULL)
			exit(13);
	} else {
		ucfp = pdata->cache_data->uncifp;

		if (ucfp == NULL)
			exit(13);
	}

	while (pdata->running) {
		FrameHeader	fheader;

		ynum = unum = vnum = 0;

		pthread_mutex_lock(&pdata->img_buff_ready_mutex);
		while (pdata->running && capture_frameno >= pdata->capture_frameno)
			pthread_cond_wait(&pdata->image_buffer_ready, &pdata->img_buff_ready_mutex);

		capture_frameno = pdata->capture_frameno;
		pthread_mutex_unlock(&pdata->img_buff_ready_mutex);

		pthread_mutex_lock(&pdata->pause_mutex);
		while (pdata->paused)
			pthread_cond_wait(&pdata->pause_cond, &pdata->pause_mutex);
		pthread_mutex_unlock(&pdata->pause_mutex);

		pthread_mutex_lock(&pdata->yuv_mutex);

		//find and flush different blocks
		if (firstrun) {
			firstrun = 0;
			for(int j = 0; j < blocknum_x * blocknum_y; j++) {
					yblocks[ynum] = 1;
					y_short_blocks[ynum] = j;
					ynum++;
					ublocks[unum] = 1;
					u_short_blocks[unum] = j;
					unum++;
					vblocks[vnum] = 1;
					v_short_blocks[vnum] = j;
					vnum++;
			}
		} else {
			/**COMPRESS ARRAYS*/
			for(int j = 0; j < blocknum_x * blocknum_y; j++) {
				if (yblocks[j]) {
					y_short_blocks[ynum] = j;
					ynum++;
				}
				if (ublocks[j]) {
					u_short_blocks[unum] = j;
					unum++;
				}
				if (vblocks[j]) {
					v_short_blocks[vnum] = j;
					vnum++;
				}
			}
		}

		/**WRITE FRAME TO DISK*/
		if (!pdata->args.zerocompression) {
			if (ynum * 4 + unum + vnum > (blocknum_x * blocknum_y * 6) / 10)
				gzsetparams(fp, 1, Z_FILTERED);
			else
				gzsetparams(fp, 0, Z_FILTERED);
		}

		strncpy(fheader.frame_prefix, "FRAM", 4);
		fheader.capture_frameno = capture_frameno;
		frameno++;

		fheader.Ynum = ynum;
		fheader.Unum = unum;
		fheader.Vnum = vnum;

		if (!pdata->args.zerocompression) {
			nbytes += gzwrite(fp, (void*)&fheader, sizeof(FrameHeader));
			//flush indexes
			if (ynum)
				nbytes += gzwrite(fp, (void*)y_short_blocks, ynum * index_entry_size);

			if (unum)
				nbytes += gzwrite(fp, (void*)u_short_blocks, unum * index_entry_size);

			if (vnum)
				nbytes += gzwrite(fp, (void*)v_short_blocks, vnum * index_entry_size);
		} else {
			nbytes += sizeof(FrameHeader)*
					fwrite((void*)&fheader, sizeof(FrameHeader), 1, ucfp);
			//flush indexes
			if (ynum)
				nbytes += index_entry_size * fwrite(y_short_blocks, index_entry_size, ynum, ucfp);

			if (unum)
				nbytes += index_entry_size * fwrite(u_short_blocks, index_entry_size, unum, ucfp);

			if (vnum)
				nbytes += index_entry_size * fwrite(v_short_blocks, index_entry_size, vnum, ucfp);
		}

		//flush the blocks for each buffer
		if (ynum) {
			for(int j = 0; j < ynum; j++)
				nbytes += rmdFlushBlock(pdata->enc_data->yuv.y,
							y_short_blocks[j],
							pdata->enc_data->yuv.y_width,
							pdata->enc_data->yuv.y_height,
							Y_UNIT_WIDTH,
							fp,
							ucfp,
							0);
		}

		if (unum) {
			for(int j = 0; j < unum; j++)
				nbytes += rmdFlushBlock(pdata->enc_data->yuv.u,
							u_short_blocks[j],
							pdata->enc_data->yuv.uv_width,
							pdata->enc_data->yuv.uv_height,
							UV_UNIT_WIDTH,
							fp,
							ucfp,
							0);
		}

		if (vnum) {
			for(int j = 0; j < vnum; j++)
				nbytes += rmdFlushBlock(pdata->enc_data->yuv.v,
							v_short_blocks[j],
							pdata->enc_data->yuv.uv_width,
							pdata->enc_data->yuv.uv_height,
							UV_UNIT_WIDTH,
							fp,
							ucfp,
							0);
		}

		//release main buffer
		pthread_mutex_unlock(&pdata->yuv_mutex);

		nbytes += rmdFlushBlock(NULL, 0, 0, 0, 0, fp, ucfp, 1);
		/**@________________@**/

		if (nbytes > CACHE_FILE_SIZE_LIMIT) {
			if (rmdSwapCacheFilesWrite(pdata->cache_data->imgdata, nth_cache, &fp, &ucfp)) {
				fprintf(stderr,	"New cache file could not be created.\n"
						"Ending recording...\n");
				raise(SIGINT);  //if for some reason we cannot make a new file
						//we have to stop. If we are out of space,
						//which means
						//that encoding cannot happen either,
						//InitEncoder will cause an abrupt end with an
						//error code and the cache will remain intact.
						//If we've chosen separate two-stages,
						//the program will make a
						//clean exit.
						//In either case data will be preserved so if
						//space is freed the recording
						//can be proccessed later.
			}
			total_bytes += nbytes;
			nth_cache++;
			nbytes = 0;
		}
	}
	total_bytes += nbytes;

	{
	  unsigned int bytes_per_pixel = pdata->specs.depth >= 24 ? 4 : 2;
	  unsigned int pixels_per_frame = pdata->enc_data->yuv.y_width * pdata->enc_data->yuv.y_height;
	  
	  total_received_bytes = ((unsigned long long int)frameno) * bytes_per_pixel * pixels_per_frame;
	}

	if (total_received_bytes) {
		double percent_of_data_left = (total_bytes / (double)total_received_bytes) * 100;

		fprintf(stderr, "\n"
				"*********************************************\n"
				"\n"
				"Cached %llu MB, from %llu MB that were received.\n"
				"Average cache compression ratio: %.1f %%\n"
				"\n"
				"*********************************************\n",
				total_bytes / BYTES_PER_MB,
				total_received_bytes / BYTES_PER_MB,
				100 - percent_of_data_left);

	}

	fprintf(stderr, "Saved %d frames in a total of %d requests\n",
			frameno,
			capture_frameno);

	if (!pdata->args.zerocompression) {
		gzflush(fp, Z_FINISH);
		gzclose(fp);
	} else {
		fflush(ucfp);
		fclose(ucfp);
	}

	pthread_exit(&errno);
}
© All Rights Reserved