source: mainline/uspace/app/wavplay/main.c@ c1694b6b

/*
 * Copyright (c) 2012 Jan Vesely
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * - Redistributions of source code must retain the above copyright
 *   notice, this list of conditions and the following disclaimer.
 * - Redistributions in binary form must reproduce the above copyright
 *   notice, this list of conditions and the following disclaimer in the
 *   documentation and/or other materials provided with the distribution.
 * - The name of the author may not be used to endorse or promote products
 *   derived from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

/** @addtogroup wavplay
 * @{
 */
/**
 * @file PCM playback audio devices
 */

#include <assert.h>
#include <errno.h>
#include <fibril_synch.h>
#include <stdlib.h>
#include <str_error.h>
#include <stdio.h>
#include <hound/client.h>
#include <pcm/sample_format.h>
#include <getopt.h>

#include "dplay.h"
#include "drec.h"
#include "wave.h"

#define READ_SIZE   (32 * 1024)
#define STREAM_BUFFER_SIZE   (64 * 1024)

/**
 * Play audio file using a new stream on provided context.
 * @param ctx Provided context.
 * @param filename File to play.
 * @return Error code.
 */
static int hplay_ctx(hound_context_t *ctx, const char *filename)
{
        printf("Hound context playback: %s\n", filename);
        FILE *source = fopen(filename, "rb");
        if (!source) {
                printf("Failed to open file %s\n", filename);
                return EINVAL;
        }

        /* Read and parse WAV header */
        wave_header_t header;
        size_t read = fread(&header, sizeof(header), 1, source);
        if (read != 1) {
                printf("Failed to read WAV header: %zu\n", read);
                fclose(source);
                return EIO;
        }
        pcm_format_t format;
        const char *error;
        int ret = wav_parse_header(&header, NULL, NULL, &format.channels,
            &format.sampling_rate, &format.sample_format, &error);
        if (ret != EOK) {
                printf("Error parsing `%s' wav header: %s.\n", filename, error);
                fclose(source);
                return EINVAL;
        }

        printf("File `%s' format: %u channel(s), %uHz, %s.\n", filename,
            format.channels, format.sampling_rate,
            pcm_sample_format_str(format.sample_format));

        /* Allocate buffer and create new context */
        char * buffer = malloc(READ_SIZE);
        if (!buffer) {
                fclose(source);
                return ENOMEM;
        }
        hound_stream_t *stream = hound_stream_create(ctx,
            HOUND_STREAM_DRAIN_ON_EXIT, format, STREAM_BUFFER_SIZE);

        /* Read and play */
        while ((read = fread(buffer, sizeof(char), READ_SIZE, source)) > 0) {
                ret = hound_stream_write(stream, buffer, read);
                if (ret != EOK) {
                        printf("Failed to write to hound stream: %s\n",
                            str_error(ret));
                        break;
                }
        }

        /* Cleanup */
        free(buffer);
        fclose(source);
        return ret;
}

/**
 * Play audio file via hound server.
 * @param filename File to play.
 * @return Error code
 */
static int hplay(const char *filename)
{
        printf("Hound playback: %s\n", filename);
        FILE *source = fopen(filename, "rb");
        if (!source) {
                printf("Failed to open file %s\n", filename);
                return EINVAL;
        }

        /* Read and parse WAV header */
        wave_header_t header;
        size_t read = fread(&header, sizeof(header), 1, source);
        if (read != 1) {
                printf("Failed to read WAV header: %zu\n", read);
                fclose(source);
                return EIO;
        }
        pcm_format_t format;
        const char *error;
        int ret = wav_parse_header(&header, NULL, NULL, &format.channels,
            &format.sampling_rate, &format.sample_format, &error);
        if (ret != EOK) {
                printf("Error parsing `%s' wav header: %s.\n", filename, error);
                fclose(source);
                return EINVAL;
        }
        printf("File `%s' format: %u channel(s), %uHz, %s.\n", filename,
            format.channels, format.sampling_rate,
            pcm_sample_format_str(format.sample_format));

        /* Connect new playback context */
        hound_context_t *hound = hound_context_create_playback(filename,
            format, STREAM_BUFFER_SIZE);
        if (!hound) {
                printf("Failed to create HOUND context\n");
                fclose(source);
                return ENOMEM;
        }

        ret = hound_context_connect_target(hound, HOUND_DEFAULT_TARGET);
        if (ret != EOK) {
                printf("Failed to connect to default target: %s\n",
                    str_error(ret));
                hound_context_destroy(hound);
                fclose(source);
                return ret;
        }

        /* Read and play */
        static char buffer[READ_SIZE];
        while ((read = fread(buffer, sizeof(char), READ_SIZE, source)) > 0) {
                ret = hound_write_main_stream(hound, buffer, read);
                if (ret != EOK) {
                        printf("Failed to write to main context stream: %s\n",
                            str_error(ret));
                        break;
                }
        }

        /* Cleanup */
        hound_context_destroy(hound);
        fclose(source);
        return ret;
}

/**
 * Helper structure for playback in separate fibrils
 */
typedef struct {
        hound_context_t *ctx;
        atomic_t *count;
        const char *file;
} fib_play_t;

/**
 * Fibril playback wrapper.
 * @param arg Argument, pointer to playback helper structure.
 * @return Error code.
 */
static int play_wrapper(void *arg)
{
        assert(arg);
        fib_play_t *p = arg;
        const int ret = hplay_ctx(p->ctx, p->file);
        atomic_dec(p->count);
        free(arg);
        return ret;
}

/**
 * Array of supported commandline options
 */
static const struct option opts[] = {
        {"device", required_argument, 0, 'd'},
        {"parallel", no_argument, 0, 'p'},
        {"record", no_argument, 0, 'r'},
        {"help", no_argument, 0, 'h'},
        {0, 0, 0, 0}
};

/**
 * Print usage help.
 * @param name Name of the program.
 */
static void print_help(const char* name)
{
        printf("Usage: %s [options] file [files...]\n", name);
        printf("supported options:\n");
        printf("\t -h, --help\t Print this help.\n");
        printf("\t -r, --record\t Start recording instead of playback. "
            "(Not implemented)\n");
        printf("\t -d, --device\t Use specified device instead of the sound "
            "service. Use location path or a special device `default'\n");
        printf("\t -p, --parallel\t Play given files in parallel instead of "
            "sequentially (does not work with -d).\n");
}

int main(int argc, char *argv[])
{
        const char *device = "default";
        int idx = 0;
        bool direct = false, record = false, parallel = false;
        optind = 0;
        int ret = 0;

        /* Parse command line options */
        while (ret != -1) {
                ret = getopt_long(argc, argv, "d:prh", opts, &idx);
                switch (ret) {
                case 'd':
                        direct = true;
                        device = optarg;
                        break;
                case 'r':
                        record = true;
                        break;
                case 'p':
                        parallel = true;
                        break;
                case 'h':
                        print_help(*argv);
                        return 0;
                };
        }

        if (parallel && direct) {
                printf("Parallel playback is available only if using sound "
                    "server (no -d)\n");
                print_help(*argv);
                return 1;
        }

        if (optind == argc) {
                printf("Not enough arguments.\n");
                print_help(*argv);
                return 1;
        }

        /* Init parallel playback variables */
        hound_context_t *hound_ctx = NULL;
        atomic_t playcount;
        atomic_set(&playcount, 0);

        /* Init parallel playback context if necessary */
        if (parallel) {
                hound_ctx = hound_context_create_playback("wavplay",
                    AUDIO_FORMAT_DEFAULT, STREAM_BUFFER_SIZE);
                if (!hound_ctx) {
                        printf("Failed to create global hound context\n");
                        return 1;
                }
                const int ret = hound_context_connect_target(hound_ctx,
                    HOUND_DEFAULT_TARGET);
                if (ret != EOK) {
                        printf("Failed to connect hound context to default "
                           "target.\n");
                        hound_context_destroy(hound_ctx);
                        return 1;
                }
        }

        /* play or record all files */
        for (int i = optind; i < argc; ++i) {
                const char *file = argv[i];

                printf("%s (%d/%d) %s\n", record ? "Recording" : "Playing",
                    i - optind + 1, argc - optind, file);
                if (record) {
                        if (direct) {
                                drecord(device, file);
                                continue;
                        } else {
                                printf("Indirect recording is not supported "
                                    "yet.\n");
                                break;
                        }
                }

                if (direct) {
                        dplay(device, file);
                } else {
                        if (parallel) {
                                /* Start new fibril for parallel playback */
                                fib_play_t *data = malloc(sizeof(fib_play_t));
                                if (!data) {
                                        printf("Playback of %s failed.\n",
                                                file);
                                        continue;
                                }
                                data->file = file;
                                data->count = &playcount;
                                data->ctx = hound_ctx;
                                fid_t fid = fibril_create(play_wrapper, data);
                                atomic_inc(&playcount);
                                fibril_add_ready(fid);
                        } else {
                                hplay(file);
                        }
                }
        }

        /* Wait for all fibrils to finish */
        while (atomic_get(&playcount) > 0)
                async_usleep(1000000);

        /* Destroy parallel playback context, if initialized */
        if (hound_ctx)
                hound_context_destroy(hound_ctx);
        return 0;
}
/**
 * @}
 */