/* * aplay.c - plays and records * * CREATIVE LABS CHANNEL-files * Microsoft WAVE-files * SPARC AUDIO .AU-files * Raw Data * * Copyright (c) by Jaroslav Kysela * Based on vplay program by Michael Beck * * * 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. * */ #include #include #include #include #include #include #include #include #include #include #include #include #include #include "aconfig.h" #include "formats.h" #include "version.h" #define DEFAULT_SPEED 8000 #define FORMAT_DEFAULT -1 #define FORMAT_RAW 0 #define FORMAT_VOC 1 #define FORMAT_WAVE 2 #define FORMAT_AU 3 /* global data */ static snd_pcm_sframes_t (*readi_func)(snd_pcm_t *handle, void *buffer, snd_pcm_uframes_t size); static snd_pcm_sframes_t (*writei_func)(snd_pcm_t *handle, const void *buffer, snd_pcm_uframes_t size); static snd_pcm_sframes_t (*readn_func)(snd_pcm_t *handle, void **bufs, snd_pcm_uframes_t size); static snd_pcm_sframes_t (*writen_func)(snd_pcm_t *handle, void **bufs, snd_pcm_uframes_t size); static char *command; static snd_pcm_t *handle; static struct { snd_pcm_format_t format; unsigned int channels; unsigned int rate; } hwparams, rhwparams; static int timelimit = 0; static int quiet_mode = 0; static int file_type = FORMAT_DEFAULT; static unsigned int sleep_min = 0; static int open_mode = 0; static snd_pcm_stream_t stream = SND_PCM_STREAM_PLAYBACK; static int mmap_flag = 0; static int interleaved = 1; static int nonblock = 0; static char *audiobuf = NULL; static int chunk_size = -1; static int period_time = -1; static int buffer_time = -1; static int avail_min = -1; static int verbose = 0; static int buffer_pos = 0; static size_t bits_per_sample, bits_per_frame; static size_t chunk_bytes; static snd_control_type_t digtype = SND_CONTROL_TYPE_NONE; static snd_aes_iec958_t spdif; static snd_output_t *log; static int count; static int vocmajor, vocminor; /* needed prototypes */ static void playback(char *filename); static void capture(char *filename); static void playbackv(char **filenames, unsigned int count); static void capturev(char **filenames, unsigned int count); static void begin_voc(int fd, size_t count); static void end_voc(int fd); static void begin_wave(int fd, size_t count); static void end_wave(int fd); static void begin_au(int fd, size_t count); struct fmt_capture { void (*start) (int fd, size_t count); void (*end) (int fd); char *what; } fmt_rec_table[] = { { NULL, end_wave, "raw data" }, { begin_voc, end_voc, "VOC" }, { begin_wave, end_wave, "WAVE" }, { begin_au, end_wave, "Sparc Audio" } }; #if __GNUC__ > 2 || (__GNUC__ == 2 && __GNUC_MINOR__ >= 95) #define error(...) do {\ fprintf(stderr, "%s: %s:%d: ", command, __FUNCTION__, __LINE__); \ fprintf(stderr, __VA_ARGS__); \ putc('\n', stderr); \ } while (0) #else #define error(args...) do {\ fprintf(stderr, "%s: %s:%d: ", command, __FUNCTION__, __LINE__); \ fprintf(stderr, ##args); \ putc('\n', stderr); \ } while (0) #endif static void usage(char *command) { snd_pcm_format_t k; fprintf(stderr, "\ Usage: %s [OPTION]... [FILE]... --help help --version print current version -l, --list-devices list all soundcards and digital audio devices -L, --list-pcms list all PCMs defined -D, --device=NAME select PCM by name -q, --quiet quiet mode -t, --file-type TYPE file type (voc, wav or raw) -c, --channels=# channels -f, --format=FORMAT sample format (case insensitive) -r, --rate=# sample rate -d, --duration=# interrupt after # seconds -s, --sleep-min=# min ticks to sleep -M, --mmap mmap stream -N, --nonblock nonblocking mode -F, --period-time=# distance between interrupts is # microseconds -B, --buffer-time=# buffer duration is # microseconds -A, --avail-min=# min available space for wakeup is # microseconds -X, --xfer-min=# min xfer size is # microseconds -v, --verbose show PCM structure and setup -I, --separate-channels one file for each channel -P, --iec958p AES IEC958 professional -C, --iec958c AES IEC958 consumer ", command); fprintf(stderr, "Recognized sample formats are:"); for (k = 0; k < SND_PCM_FORMAT_LAST; ++(unsigned long) k) { const char *s = snd_pcm_format_name(k); if (s) fprintf(stderr, " %s", s); } fprintf(stderr, "\nSome of these may not be available on selected hardware\n"); fprintf(stderr, "The availabled format shortcuts are:\n"); fprintf(stderr, "cd (16 bit little endian, 44100, stereo)\n"); fprintf(stderr, "dat (16 bit little endian, 48000, stereo)\n"); } static void device_list(void) { snd_ctl_t *handle; int card, err, dev, idx; snd_ctl_info_t *info; snd_pcm_info_t *pcminfo; snd_ctl_info_alloca(&info); snd_pcm_info_alloca(&pcminfo); card = -1; if (snd_card_next(&card) < 0 || card < 0) { error("no soundcards found..."); return; } while (card >= 0) { char name[32]; sprintf(name, "hw:%d", card); if ((err = snd_ctl_open(&handle, name)) < 0) { error("control open (%i): %s", card, snd_strerror(err)); continue; } if ((err = snd_ctl_info(handle, info)) < 0) { error("control hardware info (%i): %s", card, snd_strerror(err)); snd_ctl_close(handle); continue; } dev = -1; while (1) { unsigned int count; if (snd_ctl_pcm_next_device(handle, &dev)<0) error("snd_ctl_pcm_next_device"); if (dev < 0) break; snd_pcm_info_set_device(pcminfo, dev); snd_pcm_info_set_subdevice(pcminfo, 0); snd_pcm_info_set_stream(pcminfo, stream); if ((err = snd_ctl_pcm_info(handle, pcminfo)) < 0) { if (err != -ENOENT) error("control digital audio info (%i): %s", card, snd_strerror(err)); continue; } fprintf(stderr, "card %i: %s [%s], device %i: %s [%s]\n", card, snd_ctl_info_get_id(info), snd_ctl_info_get_name(info), dev, snd_pcm_info_get_id(pcminfo), snd_pcm_info_get_name(pcminfo)); count = snd_pcm_info_get_subdevices_count(pcminfo); fprintf(stderr, " Subdevices: %i/%i\n", snd_pcm_info_get_subdevices_avail(pcminfo), count); for (idx = 0; idx < count; idx++) { snd_pcm_info_set_subdevice(pcminfo, idx); if ((err = snd_ctl_pcm_info(handle, pcminfo)) < 0) { error("control digital audio playback info (%i): %s", card, snd_strerror(err)); } else { fprintf(stderr, " Subdevice #%i: %s\n", idx, snd_pcm_info_get_subdevice_name(pcminfo)); } } } snd_ctl_close(handle); if (snd_card_next(&card) < 0) { error("snd_card_next"); break; } } } static void pcm_list(void) { snd_config_t *conf; snd_output_t *out; int err = snd_config_update(); if (err < 0) error("snd_pcm_update: %s", snd_strerror(err)); err = snd_output_stdio_attach(&out, stderr, 0); assert(err >= 0); err = snd_config_search(snd_config, "pcm", &conf); if (err < 0) return; fprintf(stderr, "PCM list:"); snd_config_save(conf, out); snd_output_close(out); } static void version(void) { fprintf(stderr, "%s: version " SND_UTIL_VERSION_STR " by Jaroslav Kysela ", command); } #define OPT_HELP 1 #define OPT_VERSION 2 int main(int argc, char *argv[]) { int option_index; char *short_options = "lLD:qt:c:f:r:d:s:MNF:A:X:B:vIPC"; static struct option long_options[] = { {"help", 0, 0, OPT_HELP}, {"version", 0, 0, OPT_VERSION}, {"list-devices", 0, 0, 'l'}, {"list-pcms", 0, 0, 'L'}, {"device", 1, 0, 'D'}, {"quiet", 0, 0, 'q'}, {"file-type", 1, 0, 't'}, {"channels", 1, 0, 'c'}, {"format", 1, 0, 'f'}, {"rate", 1, 0, 'r'}, {"duration", 1, 0 ,'d'}, {"sleep-min", 0, 0, 's'}, {"mmap", 0, 0, 'M'}, {"nonblock", 0, 0, 'N'}, {"period_time", 1, 0, 'F'}, {"avail-min", 1, 0, 'A'}, {"xfer-min", 1, 0, 'X'}, {"buffer-time", 1, 0, 'B'}, {"verbose", 0, 0, 'v'}, {"iec958c", 0, 0, 'C'}, {"iec958p", 0, 0, 'P'}, {"separate-channels", 0, 0, 'I'}, {0, 0, 0, 0} }; char *pcm_name = "plug:0,0"; int tmp, err, c; snd_pcm_info_t *info; err = snd_output_stdio_attach(&log, stderr, 0); assert(err >= 0); command = argv[0]; file_type = FORMAT_DEFAULT; if (strstr(argv[0], "arecord")) { stream = SND_PCM_STREAM_CAPTURE; file_type = FORMAT_WAVE; command = "arecord"; } else if (strstr(argv[0], "aplay")) { stream = SND_PCM_STREAM_PLAYBACK; command = "aplay"; } else { error("command should be named either arecord or aplay"); return 1; } chunk_size = -1; rhwparams.format = SND_PCM_FORMAT_U8; rhwparams.rate = DEFAULT_SPEED; rhwparams.channels = 1; memset(&spdif, 0, sizeof(spdif)); while ((c = getopt_long(argc, argv, short_options, long_options, &option_index)) != -1) { switch (c) { case OPT_HELP: usage(command); return 0; case OPT_VERSION: version(); return 0; case 'l': device_list(); return 0; case 'L': pcm_list(); return 0; case 'D': pcm_name = optarg; break; case 'q': quiet_mode = 1; break; case 't': if (strcasecmp(optarg, "raw") == 0) file_type = FORMAT_RAW; else if (strcasecmp(optarg, "voc") == 0) file_type = FORMAT_VOC; else if (strcasecmp(optarg, "wav") == 0) file_type = FORMAT_WAVE; else { error("unrecognized file format %s", optarg); return 1; } break; case 'c': rhwparams.channels = atoi(optarg); if (rhwparams.channels < 1 || rhwparams.channels > 32) { error("value %i for channels is invalid", rhwparams.channels); return 1; } break; case 'f': if (strcasecmp(optarg, "cd") == 0) { rhwparams.format = SND_PCM_FORMAT_S16_LE; rhwparams.rate = 44100; rhwparams.channels = 2; } else if (strcasecmp(optarg, "dat") == 0) { rhwparams.format = SND_PCM_FORMAT_S16_LE; rhwparams.rate = 48000; rhwparams.channels = 2; } else { rhwparams.format = snd_pcm_format_value(optarg); if (rhwparams.format == SND_PCM_FORMAT_UNKNOWN) { error("wrong extended format '%s'", optarg); exit(EXIT_FAILURE); } } break; case 'r': tmp = atoi(optarg); if (tmp < 300) tmp *= 1000; rhwparams.rate = tmp; if (tmp < 2000 || tmp > 128000) { error("bad speed value %i", tmp); return 1; } break; case 'd': timelimit = atoi(optarg); break; case 's': sleep_min = atoi(optarg); break; case 'N': nonblock = 1; open_mode |= SND_PCM_NONBLOCK; break; case 'F': period_time = atoi(optarg); break; case 'B': buffer_time = atoi(optarg); break; case 'A': avail_min = atoi(optarg); break; case 'v': verbose = 1; break; case 'M': mmap_flag = 1; break; case 'I': interleaved = 0; break; case 'C': digtype = SND_CONTROL_TYPE_IEC958; spdif.status[0] = IEC958_AES0_NONAUDIO | IEC958_AES0_CON_EMPHASIS_NONE; spdif.status[1] = IEC958_AES1_CON_ORIGINAL | IEC958_AES1_CON_PCM_CODER; spdif.status[2] = 0; spdif.status[3] = IEC958_AES3_CON_FS_48000; break; case 'P': digtype = SND_CONTROL_TYPE_IEC958; spdif.status[0] = IEC958_AES0_PROFESSIONAL | IEC958_AES0_NONAUDIO | IEC958_AES0_PRO_EMPHASIS_NONE | IEC958_AES0_PRO_FS_48000; spdif.status[1] = IEC958_AES1_PRO_MODE_NOTID | IEC958_AES1_PRO_USERBITS_NOTID; spdif.status[2] = IEC958_AES2_PRO_WORDLEN_NOTID; spdif.status[3] = 0; break; default: fprintf(stderr, "Try `%s --help' for more information.\n", command); return 1; } } err = snd_pcm_open(&handle, pcm_name, stream, open_mode); if (err < 0) { error("audio open error: %s", snd_strerror(err)); return 1; } snd_pcm_info_alloca(&info); if ((err = snd_pcm_info(handle, info)) < 0) { error("info error: %s", snd_strerror(err)); return 1; } if (digtype != SND_CONTROL_TYPE_NONE) { snd_control_t *ctl; snd_ctl_t *ctl_handle; char ctl_name[12]; int ctl_card; snd_control_alloca(&ctl); snd_control_set_interface(ctl, SND_CONTROL_IFACE_PCM); snd_control_set_device(ctl, snd_pcm_info_get_device(info)); snd_control_set_subdevice(ctl, snd_pcm_info_get_subdevice(info)); snd_control_set_name(ctl, "IEC958 (S/PDIF) Stream"); snd_control_set_iec958(ctl, &spdif); ctl_card = snd_pcm_info_get_card(info); if (ctl_card < 0) { error("Unable to setup the IEC958 (S/PDIF) interface - PCM has no assigned card"); goto __diga_end; } sprintf(ctl_name, "hw:%d", ctl_card); if ((err = snd_ctl_open(&ctl_handle, ctl_name)) < 0) { error("Unable to open the control interface '%s': %s", ctl_name, snd_strerror(err)); goto __diga_end; } if ((err = snd_ctl_cwrite(ctl_handle, ctl)) < 0) { error("Unable to update the IEC958 control: %s", snd_strerror(err)); goto __diga_end; } snd_ctl_close(ctl_handle); __diga_end: } if (nonblock) { err = snd_pcm_nonblock(handle, 1); if (err < 0) { error("nonblock setting error: %s", snd_strerror(err)); return 1; } } chunk_size = 1024; hwparams = rhwparams; audiobuf = (char *)malloc(1024); if (audiobuf == NULL) { error("not enough memory"); return 1; } if (mmap_flag) { writei_func = snd_pcm_mmap_writei; readi_func = snd_pcm_mmap_readi; writen_func = snd_pcm_mmap_writen; readn_func = snd_pcm_mmap_readn; } else { writei_func = snd_pcm_writei; readi_func = snd_pcm_readi; writen_func = snd_pcm_writen; readn_func = snd_pcm_readn; } if (interleaved) { if (optind > argc - 1) { if (stream == SND_PCM_STREAM_PLAYBACK) playback(NULL); else capture(NULL); } else { while (optind <= argc - 1) { if (stream == SND_PCM_STREAM_PLAYBACK) playback(argv[optind++]); else capture(argv[optind++]); } } } else { if (stream == SND_PCM_STREAM_PLAYBACK) playbackv(&argv[optind], argc - optind); else capturev(&argv[optind], argc - optind); } snd_pcm_close(handle); free(audiobuf); snd_output_close(log); return EXIT_SUCCESS; } /* * Safe read (for pipes) */ ssize_t safe_read(int fd, void *buf, size_t count) { ssize_t result = 0, res; while (count > 0) { if ((res = read(fd, buf, count)) == 0) break; if (res < 0) return result > 0 ? result : res; count -= res; result += res; (char *)buf += res; } return result; } /* * Test, if it is a .VOC file and return >=0 if ok (this is the length of rest) * < 0 if not */ static int test_vocfile(void *buffer) { VocHeader *vp = buffer; if (strstr(vp->magic, VOC_MAGIC_STRING)) { vocminor = vp->version & 0xFF; vocmajor = vp->version / 256; if (vp->version != (0x1233 - vp->coded_ver)) return -2; /* coded version mismatch */ return vp->headerlen - sizeof(VocHeader); /* 0 mostly */ } return -1; /* magic string fail */ } /* * helper for test_wavefile */ size_t test_wavefile_read(int fd, char *buffer, size_t *size, size_t reqsize, int line) { if (*size >= reqsize) return *size; if (safe_read(fd, buffer + *size, reqsize - *size) != reqsize - *size) { error("read error (called from line %i)", line); exit(EXIT_FAILURE); } return *size = reqsize; } /* * test, if it's a .WAV file, > 0 if ok (and set the speed, stereo etc.) * == 0 if not * Value returned is bytes to be discarded. */ static ssize_t test_wavefile(int fd, char *buffer, size_t size) { WaveHeader *h = (WaveHeader *)buffer; WaveFmtBody *f; WaveChunkHeader *c; u_int type, len; if (size < sizeof(WaveHeader)) return -1; if (h->magic != WAV_RIFF || h->type != WAV_WAVE) return -1; if (size > sizeof(WaveHeader)) memmove(buffer, buffer + sizeof(WaveHeader), size - sizeof(WaveHeader)); size -= sizeof(WaveHeader); while (1) { test_wavefile_read(fd, buffer, &size, sizeof(WaveChunkHeader), __LINE__); c = (WaveChunkHeader*)buffer; type = c->type; len = LE_INT(c->length); if (size > sizeof(WaveChunkHeader)) memmove(buffer, buffer + sizeof(WaveChunkHeader), size - sizeof(WaveChunkHeader)); size -= sizeof(WaveChunkHeader); if (type == WAV_FMT) break; test_wavefile_read(fd, buffer, &size, len, __LINE__); if (size > len) memmove(buffer, buffer + len, size - len); size -= len; } if (len < sizeof(WaveFmtBody)) { error("unknown length of 'fmt ' chunk (read %u, should be %u at least)", len, (u_int)sizeof(WaveFmtBody)); exit(EXIT_FAILURE); } test_wavefile_read(fd, buffer, &size, len, __LINE__); f = (WaveFmtBody*) buffer; if (LE_SHORT(f->format) != WAV_PCM_CODE) { error("can't play not PCM-coded WAVE-files"); exit(EXIT_FAILURE); } if (LE_SHORT(f->modus) < 1) { error("can't play WAVE-files with %d tracks", LE_SHORT(f->modus)); exit(EXIT_FAILURE); } hwparams.channels = LE_SHORT(f->modus); switch (LE_SHORT(f->bit_p_spl)) { case 8: hwparams.format = SND_PCM_FORMAT_U8; break; case 16: hwparams.format = SND_PCM_FORMAT_S16_LE; break; default: error(" can't play WAVE-files with sample %d bits wide", LE_SHORT(f->bit_p_spl)); exit(EXIT_FAILURE); } hwparams.rate = LE_INT(f->sample_fq); if (size > len) memmove(buffer, buffer + len, size - len); size -= len; while (1) { u_int type, len; test_wavefile_read(fd, buffer, &size, sizeof(WaveChunkHeader), __LINE__); c = (WaveChunkHeader*)buffer; type = c->type; len = LE_INT(c->length); if (size > sizeof(WaveChunkHeader)) memmove(buffer, buffer + sizeof(WaveChunkHeader), size - sizeof(WaveChunkHeader)); size -= sizeof(WaveChunkHeader); if (type == WAV_DATA) { if (len < count) count = len; return size; } test_wavefile_read(fd, buffer, &size, len, __LINE__); if (size > len) memmove(buffer, buffer + len, size - len); size -= len; } /* shouldn't be reached */ return -1; } /* */ static int test_au(int fd, void *buffer) { AuHeader *ap = buffer; if (ap->magic != AU_MAGIC) return -1; if (BE_INT(ap->hdr_size) > 128 || BE_INT(ap->hdr_size) < 24) return -1; count = BE_INT(ap->data_size); switch (BE_INT(ap->encoding)) { case AU_FMT_ULAW: hwparams.format = SND_PCM_FORMAT_MU_LAW; break; case AU_FMT_LIN8: hwparams.format = SND_PCM_FORMAT_U8; break; case AU_FMT_LIN16: hwparams.format = SND_PCM_FORMAT_U16_LE; break; default: return -1; } hwparams.rate = BE_INT(ap->sample_rate); if (hwparams.rate < 2000 || hwparams.rate > 256000) return -1; hwparams.channels = BE_INT(ap->channels); if (hwparams.channels < 1 || hwparams.channels > 128) return -1; if (safe_read(fd, buffer + sizeof(AuHeader), BE_INT(ap->hdr_size) - sizeof(AuHeader)) != BE_INT(ap->hdr_size) - sizeof(AuHeader)) { error("read error"); exit(EXIT_FAILURE); } return 0; } static void set_params(void) { snd_pcm_hw_params_t *params; snd_pcm_sw_params_t *swparams; size_t buffer_size; int err; size_t n; size_t xfer_align; snd_pcm_hw_params_alloca(¶ms); snd_pcm_sw_params_alloca(&swparams); err = snd_pcm_hw_params_any(handle, params); if (err < 0) { error("Broken configuration for this PCM: no configurations available"); exit(EXIT_FAILURE); } if (mmap_flag) { snd_pcm_access_mask_t *mask = alloca(snd_pcm_access_mask_sizeof()); snd_pcm_access_mask_none(mask); snd_pcm_access_mask_set(mask, SND_PCM_ACCESS_MMAP_INTERLEAVED); snd_pcm_access_mask_set(mask, SND_PCM_ACCESS_MMAP_NONINTERLEAVED); snd_pcm_access_mask_set(mask, SND_PCM_ACCESS_MMAP_COMPLEX); err = snd_pcm_hw_params_set_access_mask(handle, params, mask); } else if (interleaved) err = snd_pcm_hw_params_set_access(handle, params, SND_PCM_ACCESS_RW_INTERLEAVED); else err = snd_pcm_hw_params_set_access(handle, params, SND_PCM_ACCESS_RW_NONINTERLEAVED); if (err < 0) { error("Access type not available"); exit(EXIT_FAILURE); } err = snd_pcm_hw_params_set_format(handle, params, hwparams.format); if (err < 0) { error("Sample format non available"); exit(EXIT_FAILURE); } err = snd_pcm_hw_params_set_channels(handle, params, hwparams.channels); if (err < 0) { error("Channels count non available"); exit(EXIT_FAILURE); } #if 0 err = snd_pcm_hw_params_set_periods_min(handle, params, 2); assert(err >= 0); #endif err = snd_pcm_hw_params_set_rate_near(handle, params, hwparams.rate, 0); assert(err >= 0); if (buffer_time < 0) buffer_time = 500000; buffer_time = snd_pcm_hw_params_set_buffer_time_near(handle, params, buffer_time, 0); assert(buffer_time >= 0); if (period_time < 0) period_time = buffer_time / 4; period_time = snd_pcm_hw_params_set_period_time_near(handle, params, period_time, 0); assert(period_time >= 0); err = snd_pcm_hw_params(handle, params); if (err < 0) { fprintf(stderr, "Unable to install hw params:\n"); snd_pcm_hw_params_dump(params, log); exit(EXIT_FAILURE); } chunk_size = snd_pcm_hw_params_get_period_size(params, 0); buffer_size = snd_pcm_hw_params_get_buffer_size(params); snd_pcm_sw_params_current(handle, swparams); xfer_align = snd_pcm_sw_params_get_xfer_align(swparams); if (sleep_min) xfer_align = 1; err = snd_pcm_sw_params_set_sleep_min(handle, swparams, sleep_min); assert(err >= 0); if (avail_min < 0) n = chunk_size; else n = snd_pcm_hw_params_get_rate(params, 0) * (double) avail_min / 1000000; err = snd_pcm_sw_params_set_avail_min(handle, swparams, n); err = snd_pcm_sw_params_set_xfer_align(handle, swparams, xfer_align); assert(err >= 0); if (snd_pcm_sw_params(handle, swparams) < 0) { error("unable to install sw params:"); snd_pcm_sw_params_dump(swparams, log); exit(EXIT_FAILURE); } if (verbose) snd_pcm_dump(handle, log); bits_per_sample = snd_pcm_format_physical_width(hwparams.format); bits_per_frame = bits_per_sample * hwparams.channels; chunk_bytes = chunk_size * bits_per_frame / 8; audiobuf = realloc(audiobuf, chunk_bytes); if (audiobuf == NULL) { error("not enough memory"); exit(EXIT_FAILURE); } // fprintf(stderr, "real chunk_size = %i, frags = %i, total = %i\n", chunk_size, setup.buf.block.frags, setup.buf.block.frags * chunk_size); } /* playback write error hander */ void xrun(void) { snd_pcm_status_t *status; int res; snd_pcm_status_alloca(&status); if ((res = snd_pcm_status(handle, status))<0) { error("status error: %s", snd_strerror(res)); exit(EXIT_FAILURE); } if (snd_pcm_status_get_state(status) == SND_PCM_STATE_XRUN) { struct timeval now, diff, tstamp; gettimeofday(&now, 0); snd_pcm_status_get_trigger_tstamp(status, &tstamp); timersub(&now, &tstamp, &diff); fprintf(stderr, "xrun!!! (at least %.3f ms long)\n", diff.tv_sec * 1000 + diff.tv_usec / 1000.0); if (verbose) { fprintf(stderr, "Status:\n"); snd_pcm_status_dump(status, log); } if ((res = snd_pcm_prepare(handle))<0) { error("xrun: prepare error: %s", snd_strerror(res)); exit(EXIT_FAILURE); } return; /* ok, data should be accepted again */ } error("read/write error"); exit(EXIT_FAILURE); } /* * write function */ static ssize_t pcm_write(u_char *data, size_t count) { ssize_t r; ssize_t result = 0; if (sleep_min == 0 && count < chunk_size) { snd_pcm_format_set_silence(hwparams.format, data + count * bits_per_frame / 8, (chunk_size - count) * hwparams.channels); count = chunk_size; } while (count > 0) { r = writei_func(handle, data, count); if (r == -EAGAIN || (r >= 0 && r < count)) { snd_pcm_wait(handle, 1000); } else if (r == -EPIPE) { xrun(); } else if (r < 0) { error("write error: %s", snd_strerror(r)); exit(EXIT_FAILURE); } if (r > 0) { result += r; count -= r; data += r * bits_per_frame / 8; } } return result; } static ssize_t pcm_writev(u_char **data, unsigned int channels, size_t count) { ssize_t r; size_t result = 0; if (sleep_min == 0 && count != chunk_size) { unsigned int channel; size_t offset = count; size_t remaining = chunk_size - count; for (channel = 0; channel < channels; channel++) snd_pcm_format_set_silence(hwparams.format, data[channel] + offset * bits_per_sample / 8, remaining); count = chunk_size; } while (count > 0) { unsigned int channel; void *bufs[channels]; size_t offset = result; for (channel = 0; channel < channels; channel++) bufs[channel] = data[channel] + offset * bits_per_sample / 8; r = writen_func(handle, bufs, count); if (r == -EAGAIN || (r >= 0 && r < count)) { snd_pcm_wait(handle, 1000); } else if (r == -EPIPE) { xrun(); } else if (r < 0) { error("writev error: %s", snd_strerror(r)); exit(EXIT_FAILURE); } if (r > 0) { result += r; count -= r; } } return result; } /* * read function */ static ssize_t pcm_read(u_char *data, size_t rcount) { ssize_t r; size_t result = 0; size_t count = rcount; if (sleep_min == 0 && count != chunk_size) { count = chunk_size; } while (count > 0) { r = readi_func(handle, data, count); if (r == -EAGAIN || (r >= 0 && r < count)) { snd_pcm_wait(handle, 1000); } else if (r == -EPIPE) { xrun(); } else if (r < 0) { error("read error: %s", snd_strerror(r)); exit(EXIT_FAILURE); } if (r > 0) { result += r; count -= r; data += r * bits_per_frame / 8; } } return rcount; } static ssize_t pcm_readv(u_char **data, unsigned int channels, size_t rcount) { ssize_t r; size_t result = 0; size_t count = rcount; if (sleep_min == 0 && count != chunk_size) { count = chunk_size; } while (count > 0) { unsigned int channel; void *bufs[channels]; size_t offset = result; for (channel = 0; channel < channels; channel++) bufs[channel] = data[channel] + offset * bits_per_sample / 8; r = readn_func(handle, bufs, count); if (r == -EAGAIN || (r >= 0 && r < count)) { snd_pcm_wait(handle, 1000); } else if (r == -EPIPE) { xrun(); } else if (r < 0) { error("readv error: %s", snd_strerror(r)); exit(EXIT_FAILURE); } if (r > 0) { result += r; count -= r; } } return rcount; } /* * ok, let's play a .voc file */ static ssize_t voc_pcm_write(u_char *data, size_t count) { ssize_t result = count, r; size_t size; while (count > 0) { size = count; if (size > chunk_bytes - buffer_pos) size = chunk_bytes - buffer_pos; memcpy(audiobuf + buffer_pos, data, size); data += size; count -= size; buffer_pos += size; if (buffer_pos == chunk_bytes) { if ((r = pcm_write(audiobuf, chunk_size)) != chunk_size) return r; buffer_pos = 0; } } return result; } static void voc_write_silence(unsigned x) { unsigned l; char *buf; buf = (char *) malloc(chunk_bytes); if (buf == NULL) { error("can't allocate buffer for silence"); return; /* not fatal error */ } snd_pcm_format_set_silence(hwparams.format, buf, chunk_size * hwparams.channels); while (x > 0) { l = x; if (l > chunk_size) l = chunk_size; if (voc_pcm_write(buf, l) != l) { error("write error"); exit(EXIT_FAILURE); } x -= l; } } static void voc_pcm_flush(void) { if (buffer_pos > 0) { size_t b; if (sleep_min == 0) { if (snd_pcm_format_set_silence(hwparams.format, audiobuf + buffer_pos, chunk_bytes - buffer_pos * 8 / bits_per_sample) < 0) fprintf(stderr, "voc_pcm_flush - silence error"); b = chunk_size; } else { b = buffer_pos * 8 / bits_per_frame; } if (pcm_write(audiobuf, b) != b) error("voc_pcm_flush error"); } snd_pcm_drain(handle); } static void voc_play(int fd, int ofs, char *name) { int l; VocBlockType *bp; VocVoiceData *vd; VocExtBlock *eb; size_t nextblock, in_buffer; u_char *data, *buf; char was_extended = 0, output = 0; u_short *sp, repeat = 0; size_t silence; int filepos = 0; #define COUNT(x) nextblock -= x; in_buffer -= x; data += x #define COUNT1(x) in_buffer -= x; data += x data = buf = (u_char *)malloc(64 * 1024); buffer_pos = 0; if (data == NULL) { error("malloc error"); exit(EXIT_FAILURE); } if (!quiet_mode) { fprintf(stderr, "Playing Creative Labs Channel file '%s'...\n", name); } /* first we waste the rest of header, ugly but we don't need seek */ while (ofs > chunk_bytes) { if (safe_read(fd, buf, chunk_bytes) != chunk_bytes) { error("read error"); exit(EXIT_FAILURE); } ofs -= chunk_bytes; } if (ofs) { if (safe_read(fd, buf, ofs) != ofs) { error("read error"); exit(EXIT_FAILURE); } } hwparams.format = SND_PCM_FORMAT_U8; hwparams.channels = 1; hwparams.rate = DEFAULT_SPEED; set_params(); in_buffer = nextblock = 0; while (1) { Fill_the_buffer: /* need this for repeat */ if (in_buffer < 32) { /* move the rest of buffer to pos 0 and fill the buf up */ if (in_buffer) memcpy(buf, data, in_buffer); data = buf; if ((l = safe_read(fd, buf + in_buffer, chunk_bytes - in_buffer)) > 0) in_buffer += l; else if (!in_buffer) { /* the file is truncated, so simulate 'Terminator' and reduce the datablock for safe landing */ nextblock = buf[0] = 0; if (l == -1) { perror(name); exit(EXIT_FAILURE); } } } while (!nextblock) { /* this is a new block */ if (in_buffer < sizeof(VocBlockType)) goto __end; bp = (VocBlockType *) data; COUNT1(sizeof(VocBlockType)); nextblock = VOC_DATALEN(bp); if (output && !quiet_mode) fprintf(stderr, "\n"); /* write /n after ASCII-out */ output = 0; switch (bp->type) { case 0: #if 0 d_printf("Terminator\n"); #endif return; /* VOC-file stop */ case 1: vd = (VocVoiceData *) data; COUNT1(sizeof(VocVoiceData)); /* we need a SYNC, before we can set new SPEED, STEREO ... */ if (!was_extended) { hwparams.rate = (int) (vd->tc); hwparams.rate = 1000000 / (256 - hwparams.rate); #if 0 d_printf("Channel data %d Hz\n", dsp_speed); #endif if (vd->pack) { /* /dev/dsp can't it */ error("can't play packed .voc files"); return; } if (hwparams.channels == 2) /* if we are in Stereo-Mode, switch back */ hwparams.channels = 1; } else { /* there was extended block */ hwparams.channels = 2; was_extended = 0; } set_params(); break; case 2: /* nothing to do, pure data */ #if 0 d_printf("Channel continuation\n"); #endif break; case 3: /* a silence block, no data, only a count */ sp = (u_short *) data; COUNT1(sizeof(u_short)); hwparams.rate = (int) (*data); COUNT1(1); hwparams.rate = 1000000 / (256 - hwparams.rate); set_params(); silence = (((size_t) * sp) * 1000) / hwparams.rate; #if 0 d_printf("Silence for %d ms\n", (int) silence); #endif voc_write_silence(*sp); break; case 4: /* a marker for syncronisation, no effect */ sp = (u_short *) data; COUNT1(sizeof(u_short)); #if 0 d_printf("Marker %d\n", *sp); #endif break; case 5: /* ASCII text, we copy to stderr */ output = 1; #if 0 d_printf("ASCII - text :\n"); #endif break; case 6: /* repeat marker, says repeatcount */ /* my specs don't say it: maybe this can be recursive, but I don't think somebody use it */ repeat = *(u_short *) data; COUNT1(sizeof(u_short)); #if 0 d_printf("Repeat loop %d times\n", repeat); #endif if (filepos >= 0) { /* if < 0, one seek fails, why test another */ if ((filepos = lseek(fd, 0, 1)) < 0) { error("can't play loops; %s isn't seekable\n", name); repeat = 0; } else { filepos -= in_buffer; /* set filepos after repeat */ } } else { repeat = 0; } break; case 7: /* ok, lets repeat that be rewinding tape */ if (repeat) { if (repeat != 0xFFFF) { #if 0 d_printf("Repeat loop %d\n", repeat); #endif --repeat; } #if 0 else d_printf("Neverending loop\n"); #endif lseek(fd, filepos, 0); in_buffer = 0; /* clear the buffer */ goto Fill_the_buffer; } #if 0 else d_printf("End repeat loop\n"); #endif break; case 8: /* the extension to play Stereo, I have SB 1.0 :-( */ was_extended = 1; eb = (VocExtBlock *) data; COUNT1(sizeof(VocExtBlock)); hwparams.rate = (int) (eb->tc); hwparams.rate = 256000000L / (65536 - hwparams.rate); hwparams.channels = eb->mode == VOC_MODE_STEREO ? 2 : 1; if (hwparams.channels == 2) hwparams.rate = hwparams.rate >> 1; if (eb->pack) { /* /dev/dsp can't it */ error("can't play packed .voc files"); return; } #if 0 d_printf("Extended block %s %d Hz\n", (eb->mode ? "Stereo" : "Mono"), dsp_speed); #endif break; default: error("unknown blocktype %d. terminate.", bp->type); return; } /* switch (bp->type) */ } /* while (! nextblock) */ /* put nextblock data bytes to dsp */ l = in_buffer; if (nextblock < l) l = nextblock; if (l) { if (output && !quiet_mode) { if (write(2, data, l) != l) { /* to stderr */ error("write error"); exit(EXIT_FAILURE); } } else { if (voc_pcm_write(data, l) != l) { error("write error"); exit(EXIT_FAILURE); } } COUNT(l); } } /* while(1) */ __end: voc_pcm_flush(); free(buf); } /* that was a big one, perhaps somebody split it :-) */ /* setting the globals for playing raw data */ static void init_raw_data(void) { hwparams = rhwparams; } /* calculate the data count to read from/to dsp */ static size_t calc_count(void) { size_t count; if (!timelimit) { count = 0x7fffffff; } else { count = snd_pcm_format_size(hwparams.format, timelimit * hwparams.rate * hwparams.channels); } return count; } /* write a .VOC-header */ static void begin_voc(int fd, size_t cnt) { VocHeader vh; VocBlockType bt; VocVoiceData vd; VocExtBlock eb; strncpy(vh.magic, VOC_MAGIC_STRING, 20); vh.magic[19] = 0x1A; vh.headerlen = sizeof(VocHeader); vh.version = VOC_ACTUAL_VERSION; vh.coded_ver = 0x1233 - VOC_ACTUAL_VERSION; if (write(fd, &vh, sizeof(VocHeader)) != sizeof(VocHeader)) { error("write error"); exit(EXIT_FAILURE); } if (hwparams.channels > 1) { /* write a extended block */ bt.type = 8; bt.datalen = 4; bt.datalen_m = bt.datalen_h = 0; if (write(fd, &bt, sizeof(VocBlockType)) != sizeof(VocBlockType)) { error("write error"); exit(EXIT_FAILURE); } eb.tc = (u_short) (65536 - 256000000L / (hwparams.rate << 1)); eb.pack = 0; eb.mode = 1; if (write(fd, &eb, sizeof(VocExtBlock)) != sizeof(VocExtBlock)) { error("write error"); exit(EXIT_FAILURE); } } bt.type = 1; cnt += sizeof(VocVoiceData); /* Channel_data block follows */ bt.datalen = (u_char) (cnt & 0xFF); bt.datalen_m = (u_char) ((cnt & 0xFF00) >> 8); bt.datalen_h = (u_char) ((cnt & 0xFF0000) >> 16); if (write(fd, &bt, sizeof(VocBlockType)) != sizeof(VocBlockType)) { error("write error"); exit(EXIT_FAILURE); } vd.tc = (u_char) (256 - (1000000 / hwparams.rate)); vd.pack = 0; if (write(fd, &vd, sizeof(VocVoiceData)) != sizeof(VocVoiceData)) { error("write error"); exit(EXIT_FAILURE); } } /* write a WAVE-header */ static void begin_wave(int fd, size_t cnt) { WaveHeader h; WaveFmtBody f; WaveChunkHeader cf, cd; int bits; u_int tmp; u_short tmp2; bits = 8; switch ((unsigned long) hwparams.format) { case SND_PCM_FORMAT_U8: bits = 8; break; case SND_PCM_FORMAT_S16_LE: bits = 16; break; default: error("Wave doesn't support %s format...", snd_pcm_format_name(hwparams.format)); exit(EXIT_FAILURE); } h.magic = WAV_RIFF; tmp = cnt + sizeof(WaveHeader) + sizeof(WaveChunkHeader) + sizeof(WaveFmtBody) + sizeof(WaveChunkHeader) - 8; h.length = LE_INT(tmp); h.type = WAV_WAVE; cf.type = WAV_FMT; cf.length = LE_INT(16); f.format = LE_INT(WAV_PCM_CODE); f.modus = LE_SHORT(hwparams.channels); f.sample_fq = LE_INT(hwparams.rate); #if 0 tmp2 = (samplesize == 8) ? 1 : 2; f.byte_p_spl = LE_SHORT(tmp2); tmp2 = dsp_speed * hwparams.channels * tmp2; f.byte_p_sec = LE_SHORT(tmp2); #else tmp2 = hwparams.channels * ((bits + 7) / 8); f.byte_p_spl = LE_SHORT(tmp2); tmp2 = tmp2 * hwparams.rate; f.byte_p_sec = LE_SHORT(tmp2); #endif f.bit_p_spl = LE_SHORT(bits); cd.type = WAV_DATA; cd.length = LE_INT(cnt); if (write(fd, &h, sizeof(WaveHeader)) != sizeof(WaveHeader) || write(fd, &cf, sizeof(WaveChunkHeader)) != sizeof(WaveChunkHeader) || write(fd, &f, sizeof(WaveFmtBody)) != sizeof(WaveFmtBody) || write(fd, &cd, sizeof(WaveChunkHeader)) != sizeof(WaveChunkHeader)) { error("write error"); exit(EXIT_FAILURE); } } /* write a Au-header */ static void begin_au(int fd, size_t cnt) { AuHeader ah; ah.magic = AU_MAGIC; ah.hdr_size = BE_INT(24); ah.data_size = BE_INT(cnt); switch ((unsigned long) hwparams.format) { case SND_PCM_FORMAT_MU_LAW: ah.encoding = BE_INT(AU_FMT_ULAW); break; case SND_PCM_FORMAT_U8: ah.encoding = BE_INT(AU_FMT_LIN8); break; case SND_PCM_FORMAT_S16_LE: ah.encoding = BE_INT(AU_FMT_LIN16); break; default: error("Sparc Audio doesn't support %s format...", snd_pcm_format_name(hwparams.format)); exit(EXIT_FAILURE); } ah.sample_rate = BE_INT(hwparams.rate); ah.channels = BE_INT(hwparams.channels); if (write(fd, &ah, sizeof(AuHeader)) != sizeof(AuHeader)) { error("write error"); exit(EXIT_FAILURE); } } /* closing .VOC */ static void end_voc(int fd) { char dummy = 0; /* Write a Terminator */ if (write(fd, &dummy, 1) != 1) { error("write error"); exit(EXIT_FAILURE); } if (fd != 1) close(fd); } static void end_wave(int fd) { /* only close output */ if (fd != 1) close(fd); } static void header(int rtype, char *name) { if (!quiet_mode) { fprintf(stderr, "%s %s '%s' : ", (stream == SND_PCM_STREAM_PLAYBACK) ? "Playing" : "Recording", fmt_rec_table[rtype].what, name); fprintf(stderr, "%s, ", snd_pcm_format_description(hwparams.format)); fprintf(stderr, "Rate %d Hz, ", hwparams.rate); if (hwparams.channels == 1) fprintf(stderr, "Mono"); else if (hwparams.channels == 2) fprintf(stderr, "Stereo"); else fprintf(stderr, "Channels %i", hwparams.channels); fprintf(stderr, "\n"); } } /* playing raw data */ void playback_go(int fd, size_t loaded, size_t count, int rtype, char *name) { int l, r; size_t written = 0; size_t c; header(rtype, name); set_params(); while (loaded > chunk_bytes && written < count) { if (pcm_write(audiobuf + written, chunk_size) <= 0) return; written += chunk_bytes; loaded -= chunk_bytes; } if (written > 0 && loaded > 0) memmove(audiobuf, audiobuf + written, loaded); l = loaded; while (written < count) { do { c = count - written; if (c > chunk_bytes) c = chunk_bytes; c -= l; if (c == 0) break; r = safe_read(fd, audiobuf + l, c); if (r < 0) { perror(name); exit(EXIT_FAILURE); } if (r == 0) break; l += r; } while (sleep_min == 0 && l < chunk_bytes); l = l * 8 / bits_per_frame; r = pcm_write(audiobuf, l); if (r != l) break; r = r * bits_per_frame / 8; written += r; l = 0; } snd_pcm_drain(handle); } /* captureing raw data, this proc handels WAVE files and .VOCs (as one block) */ void capture_go(int fd, size_t count, int rtype, char *name) { size_t c; ssize_t r; header(rtype, name); set_params(); while (count > 0) { c = count; if (c > chunk_bytes) c = chunk_bytes; c = c * 8 / bits_per_frame; if ((r = pcm_read(audiobuf, c)) != c) break; r = r * bits_per_frame / 8; if (write(fd, audiobuf, r) != r) { perror(name); exit(EXIT_FAILURE); } count -= r; } } /* * let's play or capture it (capture_type says VOC/WAVE/raw) */ static void playback(char *name) { int fd, ofs; size_t dta; ssize_t dtawave; count = calc_count(); if (!name || !strcmp(name, "-")) { fd = 0; name = "stdin"; } else { if ((fd = open(name, O_RDONLY, 0)) == -1) { perror(name); exit(EXIT_FAILURE); } } /* read the file header */ dta = sizeof(AuHeader); if (safe_read(fd, audiobuf, dta) != dta) { error("read error"); exit(EXIT_FAILURE); } if (test_au(fd, audiobuf) >= 0) { rhwparams.format = SND_PCM_FORMAT_MU_LAW; playback_go(fd, 0, count, FORMAT_AU, name); goto __end; } dta = sizeof(VocHeader); if (safe_read(fd, audiobuf + sizeof(AuHeader), dta - sizeof(AuHeader)) != dta - sizeof(AuHeader)) { error("read error"); exit(EXIT_FAILURE); } if ((ofs = test_vocfile(audiobuf)) >= 0) { voc_play(fd, ofs, name); goto __end; } /* read bytes for WAVE-header */ if ((dtawave = test_wavefile(fd, audiobuf, dta)) >= 0) { playback_go(fd, dtawave, count, FORMAT_WAVE, name); } else { /* should be raw data */ init_raw_data(); playback_go(fd, dta, count, FORMAT_RAW, name); } __end: if (fd != 0) close(fd); } static void capture(char *name) { int fd; if (!name || !strcmp(name, "-")) { fd = 1; name = "stdout"; } else { remove(name); if ((fd = open(name, O_WRONLY | O_CREAT, 0644)) == -1) { perror(name); exit(EXIT_FAILURE); } } count = calc_count(); count += count % 2; /* WAVE-file should be even (I'm not sure), but wasting one byte isn't a problem (this can only be in 8 bit mono) */ if (fmt_rec_table[file_type].start) fmt_rec_table[file_type].start(fd, count); capture_go(fd, count, file_type, name); fmt_rec_table[file_type].end(fd); } void playbackv_go(int* fds, unsigned int channels, size_t loaded, size_t count, int rtype, char **names) { int r; size_t vsize; unsigned int channel; u_char *bufs[channels]; header(rtype, names[0]); set_params(); vsize = chunk_bytes / channels; // Not yet implemented assert(loaded == 0); for (channel = 0; channel < channels; ++channel) bufs[channel] = audiobuf + vsize * channel; while (count > 0) { size_t c = 0; size_t expected = count / channels; if (expected > vsize) expected = vsize; do { r = safe_read(fds[0], bufs[0], expected); if (r < 0) { perror(names[channel]); exit(EXIT_FAILURE); } for (channel = 1; channel < channels; ++channel) { if (safe_read(fds[channel], bufs[channel], r) != r) { perror(names[channel]); exit(EXIT_FAILURE); } } if (r == 0) break; c += r; } while (sleep_min == 0 && c < expected); c = c * 8 / bits_per_sample; r = pcm_writev(bufs, channels, c); if (r != c) break; r = r * bits_per_frame / 8; count -= r; } snd_pcm_drain(handle); } void capturev_go(int* fds, unsigned int channels, size_t count, int rtype, char **names) { size_t c; ssize_t r; unsigned int channel; size_t vsize; u_char *bufs[channels]; header(rtype, names[0]); set_params(); vsize = chunk_bytes / channels; for (channel = 0; channel < channels; ++channel) bufs[channel] = audiobuf + vsize * channel; while (count > 0) { size_t rv; c = count; if (c > chunk_bytes) c = chunk_bytes; c = c * 8 / bits_per_frame; if ((r = pcm_readv(bufs, channels, c)) != c) break; rv = r * bits_per_sample / 8; for (channel = 0; channel < channels; ++channel) { if (write(fds[channel], bufs[channel], rv) != rv) { perror(names[channel]); exit(EXIT_FAILURE); } } r = r * bits_per_frame / 8; count -= r; } } static void playbackv(char **names, unsigned int count) { int ret = 0; unsigned int channel; unsigned int channels = rhwparams.channels; int alloced = 0; int fds[channels]; for (channel = 0; channel < channels; ++channel) fds[channel] = -1; if (count == 1 && channels > 1) { size_t len = strlen(names[0]); char format[1024]; memcpy(format, names[0], len); strcpy(format + len, ".%d"); len += 4; names = malloc(sizeof(*names) * channels); for (channel = 0; channel < channels; ++channel) { names[channel] = malloc(len); sprintf(names[channel], format, channel); } alloced = 1; } else if (count != channels) { error("You need to specify %d files", channels); exit(EXIT_FAILURE); } for (channel = 0; channel < channels; ++channel) { fds[channel] = open(names[channel], O_RDONLY, 0); if (fds[channel] < 0) { perror(names[channel]); ret = EXIT_FAILURE; goto __end; } } /* should be raw data */ init_raw_data(); count = calc_count(); playbackv_go(fds, channels, 0, count, FORMAT_RAW, names); __end: for (channel = 0; channel < channels; ++channel) { if (fds[channel] >= 0) close(fds[channel]); if (alloced) free(names[channel]); } if (alloced) free(names); if (ret) exit(ret); } static void capturev(char **names, unsigned int count) { int ret = 0; unsigned int channel; unsigned int channels = rhwparams.channels; int alloced = 0; int fds[channels]; for (channel = 0; channel < channels; ++channel) fds[channel] = -1; if (count == 1) { size_t len = strlen(names[0]); char format[1024]; memcpy(format, names[0], len); strcpy(format + len, ".%d"); len += 4; names = malloc(sizeof(*names) * channels); for (channel = 0; channel < channels; ++channel) { names[channel] = malloc(len); sprintf(names[channel], format, channel); } alloced = 1; } else if (count != channels) { error("You need to specify %d files", channels); exit(EXIT_FAILURE); } for (channel = 0; channel < channels; ++channel) { fds[channel] = open(names[channel], O_WRONLY + O_CREAT, 0644); if (fds[channel] < 0) { perror(names[channel]); ret = EXIT_FAILURE; goto __end; } } /* should be raw data */ init_raw_data(); count = calc_count(); capturev_go(fds, channels, count, FORMAT_RAW, names); __end: for (channel = 0; channel < channels; ++channel) { if (fds[channel] >= 0) close(fds[channel]); if (alloced) free(names[channel]); } if (alloced) free(names); if (ret) exit(ret); }