FreeCalypso > hg > ice1-trau-tester
view pcm/pcm_tx.c @ 34:f0b026615f3b
abis: forgot to clear tf.dl_ta_usec
author | Mychaela Falconia <falcon@freecalypso.org> |
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date | Tue, 13 Aug 2024 23:07:24 +0000 |
parents | fa341317c844 |
children |
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/* * In this module we implement PCM Tx toward the TRAU. */ #include <sys/types.h> #include <sys/file.h> #include <sys/stat.h> #include <ctype.h> #include <stdint.h> #include <stdbool.h> #include <stdio.h> #include <stdlib.h> #include <string.h> #include <unistd.h> #include <osmocom/core/select.h> #include "globals.h" static const uint8_t dmw_alaw[8] = {0x34, 0x21, 0x21, 0x34, 0xB4, 0xA1, 0xA1, 0xB4}; static uint8_t pcm_fill_octet = 0x54; static bool dmw_active; static uint8_t *play_buffer; static unsigned play_buf_nframes, play_buf_ptr; static void fill_with_dmw(uint8_t *buf) { unsigned n; for (n = 0; n < 20; n++) { memcpy(buf, dmw_alaw, 8); buf += 8; } } static void fill_with_play(uint8_t *outbuf) { memcpy(outbuf, play_buffer + play_buf_ptr * 160, 160); play_buf_ptr++; if (play_buf_ptr < play_buf_nframes) return; free(play_buffer); play_buffer = NULL; printf("file play finished\n"); } void transmit_pcm_20ms(void) { uint8_t buf[160]; if (play_buffer) fill_with_play(buf); else if (dmw_active) fill_with_dmw(buf); else memset(buf, pcm_fill_octet, 160); write(ts_fd, buf, 160); } void cmd_pcm_fill(int argc, char **argv) { u_long val; char *cp; if (argc != 2) { printf("error: pcm-fill command needs 1 argument\n"); return; } if (!isxdigit(argv[1][0])) { inv_arg: printf("error: argument is not a valid hex octet\n"); return; } val = strtoul(argv[1], &cp, 16); if (*cp) goto inv_arg; if (val > 0xFF) goto inv_arg; pcm_fill_octet = val; } void cmd_dmw_on(int argc, char **argv) { dmw_active = true; } void cmd_dmw_off(int argc, char **argv) { dmw_active = false; } void cmd_play_file(int argc, char **argv) { int fd; struct stat st; if (argc != 2) { printf("error: play command needs 1 argument\n"); return; } if (play_buffer) { printf("error: file play already in progress\n"); return; } fd = open(argv[1], O_RDONLY); if (fd < 0) { perror(argv[1]); return; } fstat(fd, &st); if (!S_ISREG(st.st_mode)) { close(fd); fprintf(stderr, "error: %s is not a regular file\n", argv[1]); return; } if (!st.st_size) { close(fd); fprintf(stderr, "error: %s is an empty file\n", argv[1]); return; } if (st.st_size % 160) { close(fd); fprintf(stderr, "error: size of %s is not a multiple of 160 bytes\n", argv[1]); return; } play_buffer = malloc(st.st_size); if (!play_buffer) { close(fd); fprintf(stderr, "unable to malloc buffer for %s\n", argv[1]); return; } read(fd, play_buffer, st.st_size); close(fd); play_buf_nframes = st.st_size / 160; play_buf_ptr = 0; } void cmd_play_offset(int argc, char **argv) { int fd; struct stat st; unsigned offset, pre_offset; if (argc != 3) { printf("error: play-offset command needs 2 arguments\n"); return; } if (play_buffer) { printf("error: file play already in progress\n"); return; } offset = strtoul(argv[2], NULL, 0); if (offset < 1 || offset > 159) { printf("error: offset argument out of range\n"); return; } fd = open(argv[1], O_RDONLY); if (fd < 0) { perror(argv[1]); return; } fstat(fd, &st); if (!S_ISREG(st.st_mode)) { close(fd); fprintf(stderr, "error: %s is not a regular file\n", argv[1]); return; } if (!st.st_size) { close(fd); fprintf(stderr, "error: %s is an empty file\n", argv[1]); return; } if (st.st_size % 160) { close(fd); fprintf(stderr, "error: size of %s is not a multiple of 160 bytes\n", argv[1]); return; } play_buffer = malloc(st.st_size + 160); if (!play_buffer) { close(fd); fprintf(stderr, "unable to malloc buffer for %s\n", argv[1]); return; } pre_offset = 160 - offset; memset(play_buffer, pcm_fill_octet, pre_offset); read(fd, play_buffer + pre_offset, st.st_size); close(fd); memset(play_buffer + pre_offset + st.st_size, pcm_fill_octet, offset); play_buf_nframes = st.st_size / 160 + 1; play_buf_ptr = 0; } void cmd_play_stop(int argc, char **argv) { if (!play_buffer) { printf("error: no file play in progress\n"); return; } free(play_buffer); play_buffer = NULL; }