From: Radek Polak Date: Fri, 3 Feb 2012 12:38:28 +0000 (+0100) Subject: Initial commit X-Git-Url: http://git.neil.brown.name/?a=commitdiff_plain;h=0a6940ac4e27f766222853731daffae05d2fd36c;p=gta04-gsm-voice-routing.git Initial commit --- 0a6940ac4e27f766222853731daffae05d2fd36c diff --git a/LICENSE.LGPL b/LICENSE.LGPL new file mode 100644 index 0000000..a0e8eb8 --- /dev/null +++ b/LICENSE.LGPL @@ -0,0 +1,514 @@ + GNU LESSER GENERAL PUBLIC LICENSE + + The Qt GUI Toolkit is Copyright (C) 2011 Nokia Corporation and/or its subsidiary(-ies). + Contact: Nokia Corporation (qt-info@nokia.com) + + You may use, distribute and copy the Qt GUI Toolkit under the terms of + GNU Lesser General Public License version 2.1, which is displayed below. + +------------------------------------------------------------------------- + + GNU LESSER GENERAL PUBLIC LICENSE + Version 2.1, February 1999 + + Copyright (C) 1991, 1999 Free Software Foundation, Inc. + 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA + Everyone is permitted to copy and distribute verbatim copies + of this license document, but changing it is not allowed. + +[This is the first released version of the Lesser GPL. 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Here is a sample; alter the names: + + Yoyodyne, Inc., hereby disclaims all copyright interest in the + library `Frob' (a library for tweaking knobs) written by James Random Hacker. + + , 1 April 1990 + Ty Coon, President of Vice + +That's all there is to it! + + diff --git a/Makefile b/Makefile new file mode 100644 index 0000000..a0881df --- /dev/null +++ b/Makefile @@ -0,0 +1,7 @@ +all: gsm-voice-routing + +gsm-voice-routing: gsm-voice-routing.c + gcc -lrt -lasound -lm -ldl -lpthread -o gsm-voice-routing gsm-voice-routing.c + +clean: + rm -f gsm-voice-routing diff --git a/README b/README new file mode 100644 index 0000000..308f60f --- /dev/null +++ b/README @@ -0,0 +1,8 @@ +This program routes sound between UMTS modem and internal soundcard on GTA04 phone + +It's based on this [1] great tutorial and aplay source code. + +I don't care much about license as soon as your improvements to the source +code are shared with comunity. + +[1] http://www.linuxjournal.com/article/6735 diff --git a/gsm-voice-routing.c b/gsm-voice-routing.c new file mode 100644 index 0000000..e0208b9 --- /dev/null +++ b/gsm-voice-routing.c @@ -0,0 +1,414 @@ +/* + * GTA04 gsm voice routing utility + * Copyright (c) 2012 Radek Polak + * + * gta04-gsm-voice-routing is free software; you can redistribute it and/or + * modify it under the terms of the GNU Lesser General Public + * License as published by the Free Software Foundation; either + * version 2.1 of the License, or (at your option) any later version. + * + * gta04-gsm-voice-routing 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 + * Lesser General Public License for more details. + * + * You should have received a copy of the GNU Lesser General Public + * License along with gta04-gsm-voice-routing; if not, write to the Free Software + * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA + */ + +/* + +This program routes sound between GTA04 internal sound card ("default") and +and UMTS modem sound card ("hw:1,0") + +The function can be written with following shell script: + +arecord -fS16_LE | aplay -Dhw:1,0 & +arecord -Dhw:1,0 -fS16_LE | aplay + +However the program is written in C for better control over the process. E.g. +we want to wait with routing until sound is available from UMTS. + +We have 4 streams called r0, p1, r1, p0 + +r0 - record from hw:0,0 (default) internal sound card +r1 - record from hw:1,0 umts sound card +p0 - play on hw:0,0 (default) internal sound card +p1 - play on hw:1,0 umts sound card + +All streams have rate 8000 (rate of umts sound card), 1 channel and 16bit per +sample (SND_PCM_FORMAT_S16_LE). + +We set buffer_size of sound card to 1000. +The sound card buffer consists of 4 periods. +Period has 250 frames +Frame has just one sample (one channel) and both sample and frame are 2 bytes + +We always play/record one period (250 samples, 500 bytes). At rate 8000Hz if +we had 8000 samples it would be 1s, with 250 samples it makes 31.25ms long +period - this is our latency. + +*/ + +/* Use the newer ALSA API */ +#define ALSA_PCM_NEW_HW_PARAMS_API + +#include +#include +#include +#include + +#define ERR_PCM_OPEN_FAILED -1 +#define ERR_HW_PARAMS_ANY -2 +#define ERR_HW_PARAMS_SET_ACCESS -3 +#define ERR_HW_PARAMS_SET_FORMAT -4 +#define ERR_HW_PARAMS_SET_CHANNELS -5 +#define ERR_HW_PARAMS_SET_RATE -6 +#define ERR_SW_PARAMS_CURRENT -7 +#define ERR_HW_PARAMS_SET_PERIOD_SIZE -8 +#define ERR_HW_PARAMS_SET_BUFFER_SIZE -9 +#define ERR_HW_PARAMS -10 +#define ERR_BUFFER_ALLOC_FAILED -11 +#define ERR_SW_PARAMS_SET_START_THRESHOLD -12 +#define ERR_SW_PARAMS_SET_STOP_THRESHOLD -13 +#define ERR_SW_PARAMS -14 +#define ERR_READ_OVERRUN -15 +#define ERR_READ -16 +#define ERR_SHORT_READ -17 +#define ERR_WRITE_UNDERRUN -18 +#define ERR_WRITE -19 +#define ERR_SHORT_WRITE -20 + +struct route_stream +{ + const char *id; // in: one of r0, r1, p0, p1 + char *pcm_name; // in: "default" or "hw:1,0" + snd_pcm_stream_t stream; // in: SND_PCM_STREAM_PLAYBACK / SND_PCM_STREAM_CAPTURE + snd_pcm_uframes_t start_threshold; // in: start treshold or 0 to keep default + snd_pcm_uframes_t stop_threshold; // in: stop treshold or 0 to keep default + snd_pcm_uframes_t buffer_size; // in/out: hw buffer size, e.g. 1000 frames + snd_pcm_uframes_t period_size; // in/out: period size, e.g. 250 frames + + snd_pcm_t *handle; // out: pcm handle + snd_pcm_hw_params_t *hwparams; // out: + snd_pcm_sw_params_t *swparams; // out: + int period_buffer_size; // out: size 2000 (250 frames=250 samples, one sample=2bytes) + char *period_buffer; // out: allocated buffer for playing/recording +}; + +/* Dump error on stderr with stream and error description, and return given + return_code */ +int err(const char *msg, int snd_err, struct route_stream *s, int return_code) +{ + fprintf(stderr, "%s (%s): ", s->id, s->pcm_name); + fprintf(stderr, msg); + if (snd_err < 0) { + fprintf(stderr, ": ", snd_strerror(snd_err)); + } + fprintf(stderr, "\n"); + return return_code; +} + +int open_route_stream(struct route_stream *s) +{ + unsigned int val; + int dir; + int rc; + static snd_output_t *log; + + /* Open PCM device for playback. */ + rc = snd_pcm_open(&(s->handle), s->pcm_name, s->stream, 0); + if (rc < 0) { + return err("unable to open pcm device", rc, s, ERR_PCM_OPEN_FAILED); + } + + /* Allocate a hardware parameters object. */ + snd_pcm_hw_params_alloca(&(s->hwparams)); + + /* Fill it in with default values. */ + rc = snd_pcm_hw_params_any(s->handle, s->hwparams); + if (rc < 0) { + return err("snd_pcm_hw_params_any failed", rc, s, ERR_HW_PARAMS_ANY); + } + + /* Interleaved mode */ + rc = snd_pcm_hw_params_set_access(s->handle, s->hwparams, + SND_PCM_ACCESS_RW_INTERLEAVED); + if (rc < 0) { + return err("snd_pcm_hw_params_set_access failed", rc, s, + ERR_HW_PARAMS_SET_ACCESS); + } + + /* Signed 16-bit little-endian format */ + rc = snd_pcm_hw_params_set_format(s->handle, s->hwparams, + SND_PCM_FORMAT_S16_LE); + if (rc < 0) { + return err("snd_pcm_hw_params_set_format failed", rc, s, + ERR_HW_PARAMS_SET_FORMAT); + } + + /* One channel (mono) */ + rc = snd_pcm_hw_params_set_channels(s->handle, s->hwparams, 1); + if (rc < 0) { + return err("snd_pcm_hw_params_set_channels failed", rc, s, + ERR_HW_PARAMS_SET_CHANNELS); + } + + /* 8000 bits/second sampling rate (umts modem quality) */ + rc = snd_pcm_hw_params_set_rate(s->handle, s->hwparams, 8000, 0); + if (rc < 0) { + return err("snd_pcm_hw_params_set_rate_near failed", rc, s, + ERR_HW_PARAMS_SET_RATE); + } + + /* Period size in frames (e.g. 250) */ + rc = snd_pcm_hw_params_set_period_size(s->handle, s->hwparams, + s->period_size, 0); + if (rc < 0) { + return err("snd_pcm_hw_params_set_period_size failed", rc, s, + ERR_HW_PARAMS_SET_PERIOD_SIZE); + } + + /* Buffer size in frames (e.g. 1000) */ + rc = snd_pcm_hw_params_set_buffer_size(s->handle, s->hwparams, + s->buffer_size); + if (rc < 0) { + return err("snd_pcm_hw_params_set_buffer_size failed", rc, s, + ERR_HW_PARAMS_SET_BUFFER_SIZE); + } + + /* Write the parameters to the driver */ + rc = snd_pcm_hw_params(s->handle, s->hwparams); + if (rc < 0) { + return err("snd_pcm_hw_params failed", rc, s, ERR_HW_PARAMS); + } + + /* Allocate buffer for one period twice as big as period_size because: + 1 frame = 1 sample = 2 bytes because of S16_LE and 1 channel */ + s->period_buffer_size = 2 * s->period_size; + s->period_buffer = (char *)malloc(s->period_buffer_size); + if (s->period_buffer == 0) { + return err("period_buffer alloc failed", 0, s, ERR_BUFFER_ALLOC_FAILED); + } + + /* Setup software params */ + if (s->start_threshold > 0 || s->stop_threshold > 0) { + snd_pcm_sw_params_alloca(&(s->swparams)); + + rc = snd_pcm_sw_params_current(s->handle, s->swparams); + if (rc < 0) { + return err("snd_pcm_sw_params_current failed", rc, s, + ERR_SW_PARAMS_CURRENT); + } + + /* start_threshold */ + if (s->start_threshold > 0) { + rc = snd_pcm_sw_params_set_start_threshold(s->handle, + s->swparams, + s->start_threshold); + if (rc < 0) { + return err("snd_pcm_sw_params_set_start_threshold failed", rc, + s, ERR_SW_PARAMS_SET_START_THRESHOLD); + } + } + + /* stop_threshold */ + if (s->stop_threshold > 0) { + rc = snd_pcm_sw_params_set_stop_threshold(s->handle, + s->swparams, + s->stop_threshold); + if (rc < 0) { + return err("snd_pcm_sw_params_set_start_threshold failed", rc, + s, ERR_SW_PARAMS_SET_STOP_THRESHOLD); + } + } + + rc = snd_pcm_sw_params(s->handle, s->swparams); + if (rc < 0) { + return err("snd_pcm_sw_params failed", rc, s, ERR_SW_PARAMS); + } + } + + /* Uncomment to dump hw setup */ + /* snd_output_stdio_attach(&log, stderr, 0); + snd_pcm_dump(s->handle, log); + snd_output_close(log); */ + + return 0; +} + +int close_route_stream(struct route_stream *s) +{ + if (s->handle == 0) { + return 0; + } + snd_pcm_drain(s->handle); + snd_pcm_close(s->handle); + if (s->period_buffer == 0) { + return 0; + } + free(s->period_buffer); + return 0; +} + +void open_route_stream_repeated(struct route_stream *s) +{ + int rc; + for (;;) { + rc = open_route_stream(s); + if (rc == 0) { + return; + } + close_route_stream(s); + fprintf(stderr, "retrying in 100 ms\n"); + usleep(1000 * 100); + } +} + +int route_stream_read(struct route_stream *s) +{ + int rc; + + rc = snd_pcm_readi(s->handle, s->period_buffer, s->period_size); + if (rc == s->period_size) { + return 0; + } + + /* EPIPE means overrun */ + if (rc == -EPIPE) { + err("overrun occured", rc, s, ERR_READ_OVERRUN); + snd_pcm_prepare(s->handle); + return ERR_READ_OVERRUN; + } + + if (rc < 0) { + return err("snd_pcm_readi failed", rc, s, ERR_READ); + } + + return err("short read", rc, s, ERR_SHORT_READ); +} + +int route_stream_write(struct route_stream *s) +{ + int rc; + + rc = snd_pcm_writei(s->handle, s->period_buffer, s->period_size); + if (rc == s->period_size) { + return 0; + } + + /* EPIPE means underrun */ + if (rc == -EPIPE) { + err("underrun occured", rc, s, ERR_WRITE_UNDERRUN); + snd_pcm_prepare(s->handle); + return ERR_WRITE_UNDERRUN; + } + + if (rc < 0) { + return err("snd_pcm_writei failed", rc, s, ERR_WRITE); + } + + return err("short write", rc, s, ERR_SHORT_WRITE); +} + +void log_with_timestamp(const char *msg) +{ + struct timespec tp; + clock_gettime(CLOCK_MONOTONIC, &tp); + fprintf(stderr, "%d %d: %s\n", tp.tv_sec, tp.tv_nsec, msg); +} + +int main() +{ + int rc; + int started = 0; + + struct route_stream p0 = { + .id = "p0", + .pcm_name = "default", + .stream = SND_PCM_STREAM_PLAYBACK, + .start_threshold = 1000, + .stop_threshold = 1000, + .buffer_size = 1000, + .period_size = 250, + .handle = 0, + .period_buffer = 0 + }; + + struct route_stream r0 = { + .id = "r0", + .pcm_name = "default", + .stream = SND_PCM_STREAM_CAPTURE, + .start_threshold = 0, + .stop_threshold = 0, + .buffer_size = 1000, + .period_size = 250, + .handle = 0, + .period_buffer = 0 + }; + + struct route_stream p1 = { + .id = "p1", + .pcm_name = "hw:1,0", + .stream = SND_PCM_STREAM_PLAYBACK, + .start_threshold = 1000, + .stop_threshold = 1000, + .buffer_size = 1000, + .period_size = 250, + .handle = 0, + .period_buffer = 0 + }; + + struct route_stream r1 = { + .id = "r1", + .pcm_name = "hw:1,0", + .stream = SND_PCM_STREAM_CAPTURE, + .start_threshold = 0, + .stop_threshold = 0, + .buffer_size = 1000, + .period_size = 250, + .handle = 0, + .period_buffer = 0 + }; + + /* Open streams - umts first */ + open_route_stream_repeated(&p1); + open_route_stream_repeated(&r1); + open_route_stream_repeated(&p0); + open_route_stream_repeated(&r0); + + /* Route sound */ + for (;;) { + + /* Recording - first from internal card (so that we always clean the + recording buffer), then UMTS, which can fail */ + if (route_stream_read(&r0)) { + continue; + } + + rc = route_stream_read(&r1); + if (rc == ERR_READ && started) { + fprintf(stderr, "read error after some succesful routing (hangup)\n"); + return 0; + } + if (rc != 0) { + continue; + } + + started = 1; + + memmove(p0.period_buffer, r1.period_buffer, r1.period_buffer_size); + route_stream_write(&p0); + + memmove(p1.period_buffer, r0.period_buffer, r0.period_buffer_size); + route_stream_write(&p1); + } + + close_route_stream(&p0); + close_route_stream(&p1); + close_route_stream(&r0); + close_route_stream(&r1); + + return 0; +}