FreeCalypso > hg > ice1-trau-tester

comparison pcm/pcm_tx.c @ 11:e149ca1dd14f

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pcm: implement play-offset command
author Mychaela Falconia <falcon@freecalypso.org>
date Sun, 23 Jun 2024 19:59:17 +0000
parents 5cf7818a7d08
children 27ca01bb5b11
comparison
equal deleted inserted replaced
10:5cf7818a7d08 11:e149ca1dd14f
135 read(fd, play_buffer, st.st_size); 135 read(fd, play_buffer, st.st_size);
136 close(fd); 136 close(fd);
137 play_buf_nframes = st.st_size / 160; 137 play_buf_nframes = st.st_size / 160;
138 play_buf_ptr = 0; 138 play_buf_ptr = 0;
139 } 139 }
140
141 void cmd_play_offset(int argc, char **argv)
142 {
143 int fd;
144 struct stat st;
145 unsigned offset, pre_offset;
146
147 if (argc != 3) {
148 printf("error: play-offset command needs 2 arguments\n");
149 return;
150 }
151 if (play_buffer) {
152 printf("error: file play already in progress\n");
153 return;
154 }
155 offset = strtoul(argv[2], NULL, 0);
156 if (offset < 1 || offset > 159) {
157 printf("error: offset argument out of range\n");
158 return;
159 }
160 fd = open(argv[1], O_RDONLY);
161 if (fd < 0) {
162 perror(argv[1]);
163 return;
164 }
165 fstat(fd, &st);
166 if (!S_ISREG(st.st_mode)) {
167 close(fd);
168 fprintf(stderr, "error: %s is not a regular file\n", argv[1]);
169 return;
170 }
171 if (!st.st_size) {
172 close(fd);
173 fprintf(stderr, "error: %s is an empty file\n", argv[1]);
174 return;
175 }
176 if (st.st_size % 160) {
177 close(fd);
178 fprintf(stderr,
179 "error: size of %s is not a multiple of 160 bytes\n",
180 argv[1]);
181 return;
182 }
183 play_buffer = malloc(st.st_size + 160);
184 if (!play_buffer) {
185 close(fd);
186 fprintf(stderr, "unable to malloc buffer for %s\n", argv[1]);
187 return;
188 }
189 pre_offset = 160 - offset;
190 memset(play_buffer, pcm_fill_octet, pre_offset);
191 read(fd, play_buffer + pre_offset, st.st_size);
192 close(fd);
193 memset(play_buffer + pre_offset + st.st_size, pcm_fill_octet, offset);
194 play_buf_nframes = st.st_size / 160 + 1;
195 play_buf_ptr = 0;
196 }