/* * 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 ssize_t (*read_func)(snd_pcm_t *handle, void *buffer, size_t size); static ssize_t (*write_func)(snd_pcm_t *handle, const void *buffer, size_t size); static ssize_t (*readv_func)(snd_pcm_t *handle, const struct iovec *vector, unsigned long count); static ssize_t (*writev_func)(snd_pcm_t *handle, const struct iovec *vector, unsigned long count); static char *command; static snd_pcm_t *handle; static snd_pcm_info_t cinfo; static snd_pcm_params_info_t cpinfo; static snd_pcm_format_t rformat, format; static snd_pcm_setup_t setup; static int timelimit = 0; static int quiet_mode = 0; static int file_type = FORMAT_DEFAULT; static int mode = SND_PCM_MODE_FRAGMENT; static int open_mode = 0; static int stream = SND_PCM_STREAM_PLAYBACK; static int mmap_flag = 0; static snd_pcm_mmap_control_t *mmap_control = NULL; static snd_pcm_mmap_status_t *mmap_status = NULL; static char *mmap_data = NULL; static int nonblock = 0; static char *audiobuf = NULL; static int align = 1; static int buffer_size = -1; static int frag_length = 125; static int buffer_length = 500; static int min_avail = 50; static int dump_pcm = 0; static int buffer_pos = 0; static size_t bits_per_sample, bits_per_frame; static size_t buffer_bytes; 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__); \ } while (0) #else #define error(args...) do {\ fprintf(stderr, "%s: %s:%d: ", command, __FUNCTION__, __LINE__); \ fprintf(stderr, ##args); \ } while (0) #endif static void check_new_format(snd_pcm_format_t * format) { if (cpinfo.rates & (SND_PCM_RATE_CONTINUOUS|SND_PCM_RATE_KNOT)) { if (format->rate < cpinfo.min_rate || format->rate > cpinfo.max_rate) { error("unsupported rate %iHz (valid range is %iHz-%iHz)\n", format->rate, cpinfo.min_rate, cpinfo.max_rate); exit(EXIT_FAILURE); } } else { unsigned int r; switch (format->rate) { case 8000: r = SND_PCM_RATE_8000; break; case 11025: r = SND_PCM_RATE_11025; break; case 16000: r = SND_PCM_RATE_16000; break; case 22050: r = SND_PCM_RATE_22050; break; case 32000: r = SND_PCM_RATE_32000; break; case 44100: r = SND_PCM_RATE_44100; break; case 48000: r = SND_PCM_RATE_48000; break; case 88200: r = SND_PCM_RATE_88200; break; case 96000: r = SND_PCM_RATE_96000; break; case 176400: r = SND_PCM_RATE_176400; break; case 192000: r = SND_PCM_RATE_192000; break; default: r = 0; break; } if (!(cpinfo.rates & r)) { error("unsupported rate %iHz\n", format->rate); exit(EXIT_FAILURE); } } if (cpinfo.min_channels > format->channels || cpinfo.max_channels < format->channels) { error("unsupported number of channels %i (valid range is %i-%i)\n", format->channels, cpinfo.min_channels, cpinfo.max_channels); exit(EXIT_FAILURE); } if (!(cpinfo.formats & (1 << format->format))) { error("unsupported format %s\n", snd_pcm_format_name(format->format)); exit(EXIT_FAILURE); } if (format->channels > 1) { if (format->interleave) { if (!(cinfo.flags & SND_PCM_INFO_INTERLEAVE)) { error("unsupported interleaved format\n"); exit(EXIT_FAILURE); } } else if (!(cinfo.flags & SND_PCM_INFO_NONINTERLEAVE)) { error("unsupported non interleaved format\n"); exit(EXIT_FAILURE); } } } static void usage(char *command) { int k; fprintf(stderr, "\ Usage: %s [OPTION]... [FILE]... --help help --version print current version --list-devices list all soundcards and digital audio devices -C, --card=# select card # or card id (0-%i), defaults to 0 -D, --device=# select device #, defaults to 0 -S, --subdevice=# select subdevice #, defaults to first available -P, --direct don't use plugins for this PCM -H, --pcm-channels=# channels for last specified PCM -h, --bind-channel=C,S bind stream channel C to PCM channel S -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 -e, --frame-mode use frame mode instead of default fragment mode -M, --mmap mmap stream -Q, --multi-direct don't use plugins on top of multi -N, --nonblock nonblocking mode -F, --fragment-length=# fragment length is # milliseconds -B, --buffer-length=# buffer length is # milliseconds -A, --min-avail=# min available space for wakeup is # milliseconds -v, --verbose show PCM structure and setup -I, --separate-channels one file for each channel ", command, snd_cards()-1); fprintf(stderr, "Recognized sample formats are:"); for (k = 0; k < 32; ++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; unsigned int mask; snd_ctl_hw_info_t info; snd_pcm_info_t pcminfo; mask = snd_cards_mask(); if (!mask) { error("no soundcards found...\n"); return; } for (card = 0; card < SND_CARDS; card++) { if (!(mask & (1 << card))) continue; if ((err = snd_ctl_open(&handle, card)) < 0) { error("control open (%i): %s\n", card, snd_strerror(err)); continue; } if ((err = snd_ctl_hw_info(handle, &info)) < 0) { error("control hardware info (%i): %s\n", card, snd_strerror(err)); snd_ctl_close(handle); continue; } for (dev = 0; dev < info.pcmdevs; dev++) { pcminfo.device = dev; pcminfo.stream = -stream - 1; pcminfo.subdevice = -1; if ((err = snd_ctl_pcm_info(handle, &pcminfo)) < 0) { error("control digital audio info (%i): %s\n", card, snd_strerror(err)); continue; } if (pcminfo.stream != stream) continue; fprintf(stderr, "%s: %i [%s] / #%i: %s\n", info.name, card + 1, info.id, dev, pcminfo.name); fprintf(stderr, " Subdevices: %i/%i\n", pcminfo.subdevices_avail, pcminfo.subdevices_count); for (idx = 0; idx < pcminfo.subdevices_count; idx++) { pcminfo.subdevice = idx; if ((err = snd_ctl_pcm_info(handle, &pcminfo)) < 0) { error("control digital audio playback info (%i): %s\n", card, snd_strerror(err)); } else { fprintf(stderr, " Subdevice #%i: %s\n", idx, pcminfo.subname); } } } snd_ctl_close(handle); } } static void version(void) { fprintf(stderr, "%s: version " SND_UTIL_VERSION_STR " by Jaroslav Kysela \n", command); } #define OPT_HELP 1 #define OPT_VERSION 2 int main(int argc, char *argv[]) { int option_index; char *short_options = "lC:D:S:H:h:qt:c:f:r:d:eMPQA:B:F:NvI"; static struct option long_options[] = { {"help", 0, 0, OPT_HELP}, {"version", 0, 0, OPT_VERSION}, {"list-devices", 0, 0, 'l'}, {"card", 1, 0, 'C'}, {"device", 1, 0, 'D'}, {"subdevice", 1, 0, 'S'}, {"pcm-channels", 1, 0, 'H'}, {"bind-channel", 1, 0, 'h'}, {"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'}, {"frame-mode", 0, 0, 'e'}, {"mmap", 0, 0, 'M'}, {"direct", 0, 0, 'P'}, {"multi-direct", 0, 0, 'Q'}, {"nonblock", 0, 0, 'N'}, {"fragment-length", 1, 0, 'F'}, {"buffer-length", 1, 0, 'B'}, {"min-avail", 1, 0, 'A'}, {"verbose", 0, 0, 'v'}, {"separate-channels", 0, 0, 'I'}, {0, 0, 0, 0} }; int binds_pcm[32]; int binds_client_channel[32]; int binds_slave_channel[32]; int pcms_card[32]; int pcms_dev[32]; int pcms_subdev[32]; size_t pcms_channels[32]; int pcms_direct[32]; int direct = 0; int multi_direct = 0; int pcm_card = 0, pcm_dev = 0, pcm_subdev = -1, pcm_channels = -1; int tmp, err, c, client_channel, slave_channel; int pcm; int pcms_count = 0, binds_count = 0; int multi; char *ptr, *beg; int get_pcm() { int pcm; if (pcm_channels < 0) pcm_channels = rformat.channels; for (pcm = 0; pcm < pcms_count; ++pcm) { if (pcms_card[pcm] == pcm_card && pcms_dev[pcm] == pcm_dev && pcms_subdev[pcm] == pcm_subdev) break; } if (pcm == pcms_count) { pcms_card[pcm] = pcm_card; pcms_dev[pcm] = pcm_dev; pcms_subdev[pcm] = pcm_subdev; pcms_channels[pcm] = pcm_channels; pcms_direct[pcm] = direct; direct = 0; pcms_count++; } else if (pcm_channels != pcms_channels[pcm]) { error("different channels count specified for the same pcm\n"); exit(1); } return pcm; } 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\n"); return 1; } buffer_size = -1; memset(&rformat, 0, sizeof(rformat)); rformat.interleave = 1; rformat.format = SND_PCM_SFMT_U8; rformat.rate = DEFAULT_SPEED; rformat.channels = 1; 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 'C': pcm_card = snd_card_name(optarg); if (pcm_card < 0) { error("soundcard '%s' not found\n", optarg); return 1; } break; case 'D': pcm_dev = atoi(optarg); if (pcm_dev < 0 || pcm_dev > 32) { error("device %i is invalid\n", pcm_dev); return 1; } break; case 'S': pcm_subdev = atoi(optarg); if (pcm_subdev < 0 || pcm_subdev > 32) { error("subdevice %i is invalid\n", pcm_subdev); return 1; } break; case 'H': pcm_channels = atoi(optarg); if (pcm_channels < 1 || pcm_channels > 32) { error("value %i for channels is invalid\n", pcm_channels); return 1; } break; case 'h': client_channel = strtol(optarg, &ptr, 10); if (*ptr != ',' || ptr == optarg) { error("invalid channel binding syntax\n"); return 1; } beg = ptr + 1; slave_channel = strtol(beg, &ptr, 10); if (*ptr || ptr == optarg) { error("invalid channel binding syntax\n"); return 1; } if (client_channel >= rformat.channels) { error("attempt to bind unavailable channel %d\n", client_channel); return 1; } if (slave_channel >= pcm_channels) { error("attempt to bind to an unavailable PCM channel %d\n", slave_channel); return 1; } pcm = get_pcm(); binds_pcm[binds_count] = pcm; binds_client_channel[binds_count] = client_channel; binds_slave_channel[binds_count] = slave_channel; ++binds_count; 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\n", optarg); return 1; } break; case 'c': rformat.channels = atoi(optarg); if (rformat.channels < 1 || rformat.channels > 32) { error("value %i for channels is invalid\n", rformat.channels); return 1; } break; case 'f': if (strcasecmp(optarg, "cd") == 0) { rformat.format = SND_PCM_SFMT_S16_LE; rformat.rate = 44100; rformat.channels = 2; } else if (strcasecmp(optarg, "dat") == 0) { rformat.format = SND_PCM_SFMT_S16_LE; rformat.rate = 48000; rformat.channels = 2; } else { rformat.format = snd_pcm_format_value(optarg); if (rformat.format < 0) { error("wrong extended format '%s'\n", optarg); exit(EXIT_FAILURE); } } break; case 'r': tmp = atoi(optarg); if (tmp < 300) tmp *= 1000; rformat.rate = tmp; if (tmp < 2000 || tmp > 128000) { error("bad speed value %i\n", tmp); return 1; } break; case 'd': timelimit = atoi(optarg); break; case 'e': mode = SND_PCM_MODE_FRAME; break; case 'M': mmap_flag = 1; break; case 'P': direct = 1; break; case 'Q': multi_direct = 1; break; case 'N': nonblock = 1; open_mode |= SND_PCM_NONBLOCK; break; case 'F': frag_length = atoi(optarg); break; case 'B': buffer_length = atoi(optarg); break; case 'A': min_avail = atoi(optarg); break; case 'v': dump_pcm = 1; break; case 'I': rformat.interleave = 0; break; default: fprintf(stderr, "Try `%s --help' for more information.\n", command); return 1; } } if (binds_count == 0) { pcm = get_pcm(); for (c = 0; c < rformat.channels; ++c) { if (c > pcm_channels) { error("attempt to bind to an unavailable PCM channel %d\n", c); return 1; } binds_pcm[binds_count] = pcm; binds_client_channel[binds_count] = c; binds_slave_channel[binds_count] = c; binds_count++; } } if (!quiet_mode) version(); assert(pcms_count > 0); multi = 0; if (pcms_count != 1 || rformat.channels != binds_count || pcm_channels != binds_count) multi = 1; else { char mask[binds_count]; memset(mask, 0, sizeof(mask)); for (c = 0; c < binds_count; ++c) { if (binds_client_channel[c] != binds_slave_channel[c]) { multi = 1; break; } if (mask[c]) { multi = 1; break; } mask[c] = 1; } } if (!quiet_mode) { for (pcm = 0; pcm < pcms_count; ++pcm) { char *cardname; if ((err = snd_card_get_longname(pcms_card[pcm], &cardname)) < 0) { error("unable to obtain longname: %s\n", snd_strerror(err)); return 1; } fprintf(stderr, "Using soundcard '%s'\n", cardname); free(cardname); } } { snd_pcm_t *handles[pcms_count]; for (pcm = 0; pcm < pcms_count; ++pcm) { if (pcms_direct[pcm]) err = snd_pcm_hw_open_subdevice(&handles[pcm], pcms_card[pcm], pcms_dev[pcm], pcms_subdev[pcm], stream, open_mode); else err = snd_pcm_plug_open_subdevice(&handles[pcm], pcms_card[pcm], pcms_dev[pcm], pcms_subdev[pcm], stream, open_mode); if (err < 0) { error("audio open error: %s\n", snd_strerror(err)); return 1; } } if (multi) { err = snd_pcm_multi_create(&handle, pcms_count, handles, pcms_channels, binds_count, binds_client_channel, binds_pcm, binds_slave_channel, 1); if (err < 0) { error("audio open error: %s\n", snd_strerror(err)); return 1; } if (!multi_direct) { snd_pcm_t *h = handle; err = snd_pcm_plug_create(&handle, h, 1); if (err < 0) { error("audio open error: %s\n", snd_strerror(err)); return 1; } } } else { handle = handles[0]; } } if (nonblock) { err = snd_pcm_nonblock(handle, 1); if (err < 0) { error("nonblock setting error: %s\n", snd_strerror(err)); return 1; } } memset(&cinfo, 0, sizeof(cinfo)); if ((err = snd_pcm_info(handle, &cinfo)) < 0) { error("info error: %s\n", snd_strerror(err)); return 1; } memset(&cpinfo, 0, sizeof(cpinfo)); if ((err = snd_pcm_params_info(handle, &cpinfo)) < 0) { error("params info error: %s\n", snd_strerror(err)); return 1; } buffer_size = 1024; format = rformat; audiobuf = (char *)malloc(1024); if (audiobuf == NULL) { error("not enough memory\n"); return 1; } if (mmap_flag) { write_func = snd_pcm_mmap_write; read_func = snd_pcm_mmap_read; writev_func = snd_pcm_mmap_writev; readv_func = snd_pcm_mmap_readv; } else { write_func = snd_pcm_write; read_func = snd_pcm_read; writev_func = snd_pcm_writev; readv_func = snd_pcm_readv; } if (rformat.interleave) { 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); 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) { res = read(fd, buf, count); 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 */ } /* * 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 int test_wavefile(void *buffer, size_t size) { WaveHeader *h = buffer; WaveFmtHeader *f; WaveChunkHeader *c; if (h->magic != WAV_RIFF || h->type != WAV_WAVE) return 0; c = (WaveChunkHeader*)((char *)buffer + sizeof(WaveHeader)); while (c->type != WAV_FMT) { c = (WaveChunkHeader*)((char*)c + sizeof(*c) + LE_INT(c->length)); if ((char *)c + sizeof(*c) > (char*) buffer + size) { error("cannot found WAVE fmt chunk\n"); exit(EXIT_FAILURE); } } f = (WaveFmtHeader*) c; if (LE_SHORT(f->format) != WAV_PCM_CODE) { error("can't play not PCM-coded WAVE-files\n"); exit(EXIT_FAILURE); } if (LE_SHORT(f->modus) < 1) { error("can't play WAVE-files with %d tracks\n", LE_SHORT(f->modus)); exit(EXIT_FAILURE); } format.channels = LE_SHORT(f->modus); switch (LE_SHORT(f->bit_p_spl)) { case 8: format.format = SND_PCM_SFMT_U8; break; case 16: format.format = SND_PCM_SFMT_S16_LE; break; default: error(" can't play WAVE-files with sample %d bits wide\n", LE_SHORT(f->bit_p_spl)); exit(EXIT_FAILURE); } format.rate = LE_INT(f->sample_fq); while (c->type != WAV_DATA) { c = (WaveChunkHeader*)((char*)c + sizeof(*c) + LE_INT(c->length)); if ((char *)c + sizeof(*c) > (char*) buffer + size) { error("cannot found WAVE data chunk\n"); exit(EXIT_FAILURE); } } if (LE_INT(c->length) < count) count = LE_INT(c->length); check_new_format(&format); return (char *)c + sizeof(*c) - (char *) buffer; } /* */ 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: format.format = SND_PCM_SFMT_MU_LAW; break; case AU_FMT_LIN8: format.format = SND_PCM_SFMT_U8; break; case AU_FMT_LIN16: format.format = SND_PCM_SFMT_U16_LE; break; default: return -1; } format.rate = BE_INT(ap->sample_rate); if (format.rate < 2000 || format.rate > 256000) return -1; format.channels = BE_INT(ap->channels); if (format.channels < 1 || format.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\n"); exit(EXIT_FAILURE); } check_new_format(&format); return 0; } static void set_params(void) { snd_pcm_params_t params; align = (snd_pcm_format_physical_width(format.format) + 7) / 8; #if 0 if (mmap_flag) snd_pcm_munmap(handle, stream); #endif snd_pcm_flush(handle); /* to be in right state */ memset(¶ms, 0, sizeof(params)); params.mode = mode; params.format = format; if (stream == SND_PCM_STREAM_PLAYBACK) { params.start_mode = SND_PCM_START_FULL; } else { params.start_mode = SND_PCM_START_DATA; } params.xrun_mode = SND_PCM_XRUN_FLUSH; params.frag_size = format.rate * frag_length / 1000; params.buffer_size = format.rate * buffer_length / 1000; params.frames_min = format.rate * min_avail / 1000; params.frames_xrun_max = 0; params.fill_mode = SND_PCM_FILL_SILENCE; params.frames_fill_max = 1024; params.frames_xrun_max = 0; if (snd_pcm_params(handle, ¶ms) < 0) { error("unable to set params (where=%x, why=%x)\n", params.fail_mask, params.fail_reason); exit(EXIT_FAILURE); } if (mmap_flag) { if (snd_pcm_mmap(handle, &mmap_status, &mmap_control, (void **)&mmap_data)<0) { error("unable to mmap memory\n"); exit(EXIT_FAILURE); } } if (snd_pcm_prepare(handle) < 0) { error("unable to prepare PCM\n"); exit(EXIT_FAILURE); } memset(&setup, 0, sizeof(setup)); if (snd_pcm_setup(handle, &setup) < 0) { error("unable to obtain setup\n"); exit(EXIT_FAILURE); } if (dump_pcm) snd_pcm_dump(handle, stderr); buffer_size = setup.frag_size; bits_per_sample = snd_pcm_format_physical_width(setup.format.format); bits_per_frame = bits_per_sample * setup.format.channels; buffer_bytes = buffer_size * bits_per_frame / 8; audiobuf = malloc(buffer_bytes); if (audiobuf == NULL) { error("not enough memory\n"); exit(EXIT_FAILURE); } // fprintf(stderr, "real buffer_size = %i, frags = %i, total = %i\n", buffer_size, setup.buf.block.frags, setup.buf.block.frags * buffer_size); } /* playback write error hander */ void playback_underrun(void) { snd_pcm_status_t status; int res; memset(&status, 0, sizeof(status)); if ((res = snd_pcm_status(handle, &status))<0) { error("playback status error: %s\n", snd_strerror(res)); exit(EXIT_FAILURE); } if (status.state == SND_PCM_STATE_XRUN) { fprintf(stderr, "underrun at position %lu!!!\n", (unsigned long)status.frame_io); if ((res = snd_pcm_prepare(handle))<0) { error("underrun: playback prepare error: %s\n", snd_strerror(res)); exit(EXIT_FAILURE); } return; /* ok, data should be accepted again */ } error("write error\n"); exit(EXIT_FAILURE); } /* capture read error hander */ void capture_overrun(void) { snd_pcm_status_t status; int res; memset(&status, 0, sizeof(status)); if ((res = snd_pcm_status(handle, &status))<0) { error("capture status error: %s\n", snd_strerror(res)); exit(EXIT_FAILURE); } if (status.state == SND_PCM_STATE_RUNNING) return; /* everything is ok, but the driver is waiting for data */ if (status.state == SND_PCM_STATE_XRUN) { error("overrun at position %lu!!!\n", (unsigned long)status.frame_io); if ((res = snd_pcm_prepare(handle))<0) { error("overrun: capture prepare error: %s\n", snd_strerror(res)); exit(EXIT_FAILURE); } return; /* ok, data should be accepted again */ } error("read error\n"); exit(EXIT_FAILURE); } /* * write function */ static ssize_t pcm_write(u_char *data, size_t count) { ssize_t r; ssize_t result = 0; if (mode == SND_PCM_MODE_FRAGMENT && count < buffer_size) { snd_pcm_format_set_silence(format.format, data + count * bits_per_frame / 8, (buffer_size - count) * format.channels); count = buffer_size; } while (count > 0) { r = write_func(handle, data, count); if (r == -EAGAIN || (r >= 0 && r < count)) { struct pollfd pfd; pfd.fd = snd_pcm_file_descriptor(handle); pfd.events = POLLOUT | POLLERR; poll(&pfd, 1, 1000); } else if (r == -EPIPE) { playback_underrun(); } else if (r < 0) { error("write error: %s\n", 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 (mode == SND_PCM_MODE_FRAGMENT && count != buffer_size) { unsigned int channel; size_t offset = count; size_t remaining = buffer_size - count; for (channel = 0; channel < channels; channel++) snd_pcm_format_set_silence(format.format, data[channel] + offset * bits_per_sample / 8, remaining); count = buffer_size; } while (count > 0) { unsigned int channel; struct iovec vec[channels]; size_t offset = result; size_t remaining = count; for (channel = 0; channel < channels; channel++) { vec[channel].iov_base = data[channel] + offset * bits_per_sample / 8; vec[channel].iov_len = remaining; } r = writev_func(handle, vec, channels); if (r == -EAGAIN || (r >= 0 && r < count)) { struct pollfd pfd; pfd.fd = snd_pcm_file_descriptor(handle); pfd.events = POLLOUT | POLLERR; poll(&pfd, 1, 1000); } else if (r == -EPIPE) { playback_underrun(); } else if (r < 0) { error("writev error: %s\n", 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 (mode == SND_PCM_MODE_FRAGMENT && count != buffer_size) { count = buffer_size; } while (count > 0) { r = read_func(handle, data, count); if (r == -EAGAIN || (r >= 0 && r < count)) { struct pollfd pfd; pfd.fd = snd_pcm_file_descriptor(handle); pfd.events = POLLIN | POLLERR; poll(&pfd, 1, 1000); } else if (r == -EPIPE) { capture_overrun(); } else if (r < 0) { error("read error: %s\n", 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 (mode == SND_PCM_MODE_FRAGMENT && count != buffer_size) { count = buffer_size; } while (count > 0) { unsigned int channel; struct iovec vec[channels]; size_t offset = result; size_t remaining = count; for (channel = 0; channel < channels; channel++) { vec[channel].iov_base = data[channel] + offset * bits_per_sample / 8; vec[channel].iov_len = remaining; } r = readv_func(handle, vec, channels); if (r == -EAGAIN || (r >= 0 && r < count)) { struct pollfd pfd; pfd.fd = snd_pcm_file_descriptor(handle); pfd.events = POLLIN | POLLERR; poll(&pfd, 1, 1000); } else if (r == -EPIPE) { capture_overrun(); } else if (r < 0) { error("readv error: %s\n", 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 > buffer_bytes - buffer_pos) size = buffer_bytes - buffer_pos; memcpy(audiobuf + buffer_pos, data, size); data += size; count -= size; buffer_pos += size; if (buffer_pos == buffer_bytes) { if ((r = pcm_write(audiobuf, buffer_size)) != buffer_size) return r; buffer_pos = 0; } } return result; } static void voc_write_silence(unsigned x) { unsigned l; char *buf; buf = (char *) malloc(buffer_bytes); if (buf == NULL) { error("can't allocate buffer for silence\n"); return; /* not fatal error */ } snd_pcm_format_set_silence(format.format, buf, buffer_size * format.channels); while (x > 0) { l = x; if (l > buffer_size) l = buffer_size; if (voc_pcm_write(buf, l) != l) { error("write error\n"); exit(EXIT_FAILURE); } x -= l; } } static void voc_pcm_flush(void) { if (buffer_pos > 0) { size_t b; if (mode == SND_PCM_MODE_FRAGMENT) { if (snd_pcm_format_set_silence(format.format, audiobuf + buffer_pos, buffer_bytes - buffer_pos * 8 / bits_per_sample) < 0) fprintf(stderr, "voc_pcm_flush - silence error\n"); b = buffer_size; } else { b = buffer_pos * 8 / bits_per_frame; } if (pcm_write(audiobuf, b) != b) error("voc_pcm_flush error\n"); } snd_pcm_flush(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\n"); 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 > buffer_bytes) { if (safe_read(fd, buf, buffer_bytes) != buffer_bytes) { error("read error\n"); exit(EXIT_FAILURE); } ofs -= buffer_bytes; } if (ofs) { if (safe_read(fd, buf, ofs) != ofs) { error("read error\n"); exit(EXIT_FAILURE); } } format.format = SND_PCM_SFMT_U8; format.channels = 1; format.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, buffer_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) { format.rate = (int) (vd->tc); format.rate = 1000000 / (256 - format.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\n"); return; } if (format.channels == 2) /* if we are in Stereo-Mode, switch back */ format.channels = 1; } else { /* there was extended block */ format.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)); format.rate = (int) (*data); COUNT1(1); format.rate = 1000000 / (256 - format.rate); set_params(); silence = (((size_t) * sp) * 1000) / format.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)); format.rate = (int) (eb->tc); format.rate = 256000000L / (65536 - format.rate); format.channels = eb->mode == VOC_MODE_STEREO ? 2 : 1; if (format.channels == 2) format.rate = format.rate >> 1; if (eb->pack) { /* /dev/dsp can't it */ error("can't play packed .voc files\n"); 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.\n", 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\n"); exit(EXIT_FAILURE); } } else { if (voc_pcm_write(data, l) != l) { error("write error\n"); 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) { format = rformat; } /* 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(format.format, timelimit * format.rate * format.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\n"); exit(EXIT_FAILURE); } if (format.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\n"); exit(EXIT_FAILURE); } eb.tc = (u_short) (65536 - 256000000L / (format.rate << 1)); eb.pack = 0; eb.mode = 1; if (write(fd, &eb, sizeof(VocExtBlock)) != sizeof(VocExtBlock)) { error("write error\n"); 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\n"); exit(EXIT_FAILURE); } vd.tc = (u_char) (256 - (1000000 / format.rate)); vd.pack = 0; if (write(fd, &vd, sizeof(VocVoiceData)) != sizeof(VocVoiceData)) { error("write error\n"); exit(EXIT_FAILURE); } } /* write a WAVE-header */ static void begin_wave(int fd, size_t cnt) { WaveHeader h; WaveFmtHeader f; WaveChunkHeader c; int bits; u_int tmp; u_short tmp2; bits = 8; switch (format.format) { case SND_PCM_SFMT_U8: bits = 8; break; case SND_PCM_SFMT_S16_LE: bits = 16; break; default: error("Wave doesn't support %s format...\n", snd_pcm_format_name(format.format)); exit(EXIT_FAILURE); } h.magic = WAV_RIFF; tmp = cnt + sizeof(WaveHeader) + sizeof(WaveFmtHeader) + sizeof(WaveChunkHeader) - 8; h.length = LE_INT(tmp); h.type = WAV_WAVE; f.type = WAV_FMT; f.length = LE_INT(16); f.format = LE_INT(WAV_PCM_CODE); f.modus = LE_SHORT(format.channels); f.sample_fq = LE_INT(format.rate); #if 0 tmp2 = (samplesize == 8) ? 1 : 2; f.byte_p_spl = LE_SHORT(tmp2); tmp2 = dsp_speed * format.channels * tmp2; f.byte_p_sec = LE_SHORT(tmp2); #else tmp2 = format.channels * ((bits + 7) / 8); f.byte_p_spl = LE_SHORT(tmp2); tmp2 = tmp2 * format.rate; f.byte_p_sec = LE_SHORT(tmp2); #endif f.bit_p_spl = LE_SHORT(bits); c.type = WAV_DATA; c.length = LE_INT(cnt); if (write(fd, &h, sizeof(WaveHeader)) != sizeof(WaveHeader) || write(fd, &f, sizeof(WaveFmtHeader)) != sizeof(WaveFmtHeader) || write(fd, &c, sizeof(WaveChunkHeader)) != sizeof(WaveChunkHeader)) { error("write error\n"); 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 (format.format) { case SND_PCM_SFMT_MU_LAW: ah.encoding = BE_INT(AU_FMT_ULAW); break; case SND_PCM_SFMT_U8: ah.encoding = BE_INT(AU_FMT_LIN8); break; case SND_PCM_SFMT_S16_LE: ah.encoding = BE_INT(AU_FMT_LIN16); break; default: error("Sparc Audio doesn't support %s format...\n", snd_pcm_format_name(format.format)); exit(EXIT_FAILURE); } ah.sample_rate = BE_INT(format.rate); ah.channels = BE_INT(format.channels); if (write(fd, &ah, sizeof(AuHeader)) != sizeof(AuHeader)) { error("write error\n"); 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(format.format)); fprintf(stderr, "Rate %d Hz, ", format.rate); if (format.channels == 1) fprintf(stderr, "Mono"); else if (format.channels == 2) fprintf(stderr, "Stereo"); else fprintf(stderr, "Channels %i", format.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 > buffer_bytes && written < count) { if (pcm_write(audiobuf + written, buffer_size) <= 0) return; written += buffer_bytes; loaded -= buffer_bytes; } if (written > 0 && loaded > 0) memmove(audiobuf, audiobuf + written, loaded); l = loaded; while (written < count) { do { c = count - written; if (c > buffer_bytes) c = buffer_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 (mode != SND_PCM_MODE_FRAME && l < buffer_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_flush(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 > buffer_bytes) c = buffer_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; count = calc_count(); snd_pcm_flush(handle); 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 */ if (safe_read(fd, audiobuf, sizeof(AuHeader)) != sizeof(AuHeader)) { error("read error\n"); exit(EXIT_FAILURE); } if (test_au(fd, audiobuf) >= 0) { rformat.format = SND_PCM_SFMT_MU_LAW; playback_go(fd, 0, count, FORMAT_AU, name); goto __end; } if (safe_read(fd, audiobuf + sizeof(AuHeader), sizeof(VocHeader) - sizeof(AuHeader)) != sizeof(VocHeader) - sizeof(AuHeader)) { error("read error\n"); exit(EXIT_FAILURE); } if ((ofs = test_vocfile(audiobuf)) >= 0) { voc_play(fd, ofs, name); goto __end; } /* read bytes for WAVE-header */ if (safe_read(fd, audiobuf + sizeof(VocHeader), 64 - sizeof(VocHeader)) != 64 - sizeof(VocHeader)) { error("read error\n"); exit(EXIT_FAILURE); } if ((ofs = test_wavefile(audiobuf, 64)) > 0) { memmove(audiobuf, audiobuf + ofs, 64 - ofs); playback_go(fd, 64 - ofs, count, FORMAT_WAVE, name); } else { /* should be raw data */ check_new_format(&rformat); init_raw_data(); playback_go(fd, 64, count, FORMAT_RAW, name); } __end: if (fd != 0) close(fd); } static void capture(char *name) { int fd; snd_pcm_flush(handle); 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); check_new_format(&rformat); 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 = buffer_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 (mode != SND_PCM_MODE_FRAME && 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_flush(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 = buffer_bytes / channels; for (channel = 0; channel < channels; ++channel) bufs[channel] = audiobuf + vsize * channel; while (count > 0) { size_t rv; c = count; if (c > buffer_bytes) c = buffer_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 = rformat.channels; int alloced = 0; int fds[channels]; for (channel = 0; channel < channels; ++channel) fds[channel] = -1; snd_pcm_flush(handle); 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\n", 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 */ check_new_format(&rformat); 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 = rformat.channels; int alloced = 0; int fds[channels]; for (channel = 0; channel < channels; ++channel) fds[channel] = -1; snd_pcm_flush(handle); 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\n", 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 */ check_new_format(&rformat); 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); }