source: mainline/uspace/app/dplay/dplay.c@ 9d5244f

/*
 * Copyright (c) 2011 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 dplay
 * @{
 */
/**
 * @file PCM playback audio devices
 */

#include <assert.h>
#include <errno.h>
#include <str_error.h>
#include <str.h>
#include <devman.h>
#include <audio_pcm_buffer_iface.h>
#include <fibril_synch.h>
#include <stdio.h>
#include <sys/mman.h>
#include <sys/time.h>

#include <stdio.h>
#include <macros.h>

#include "wave.h"

#define DEFAULT_DEVICE "/hw/pci0/00:01.0/sb16/dsp"
#define SUBBUFFERS 2

typedef struct {
        struct {
                void *base;
                size_t size;
                unsigned id;
                void* position;
        } buffer;
        FILE* source;
        volatile bool playing;
        fibril_mutex_t mutex;
        fibril_condvar_t cv;
        async_exch_t *device;
} playback_t;

static void playback_initialize(playback_t *pb, async_exch_t *exch)
{
        assert(exch);
        assert(pb);
        pb->buffer.id = 0;
        pb->buffer.base = NULL;
        pb->buffer.size = 0;
        pb->playing = false;
        pb->source = NULL;
        pb->device = exch;
        fibril_mutex_initialize(&pb->mutex);
        fibril_condvar_initialize(&pb->cv);
}


static void device_event_callback(ipc_callid_t iid, ipc_call_t *icall, void* arg)
{
        static unsigned wait = SUBBUFFERS;
        while (1) {
                ipc_call_t call;
                ipc_callid_t callid = async_get_call(&call);
                if (IPC_GET_IMETHOD(call) != IPC_FIRST_USER_METHOD) {
                        printf("Unknown event.\n");
                        async_answer_0(callid,EOK);
                        break;
                }
                playback_t *pb = arg;
//              printf("Got device event!!!\n");
                const size_t buffer_part = pb->buffer.size / SUBBUFFERS;
                const size_t bytes = fread(pb->buffer.position, sizeof(uint8_t),
                   buffer_part, pb->source);
                pb->buffer.position += bytes;
                if (bytes != buffer_part)
                        bzero(pb->buffer.position, buffer_part - bytes);
                pb->buffer.position += buffer_part - bytes;
                if (pb->buffer.position >= (pb->buffer.base + pb->buffer.size))
                        pb->buffer.position = pb->buffer.base;
                async_answer_0(callid,EOK);
                if (bytes == 0 && (wait-- == 0)) {
                        pb->playing = false;
                        fibril_condvar_signal(&pb->cv);
                        return;
                }
        }
}


static void play(playback_t *pb, unsigned sampling_rate, unsigned sample_size,
    unsigned channels, bool sign)
{
        assert(pb);
        assert(pb->device);
        pb->buffer.position = pb->buffer.base;
        printf("Playing: %dHz, %d-bit samples, %d channel(s), %sSIGNED.\n",
            sampling_rate, sample_size, channels, sign ? "": "UN");
        const size_t bytes = fread(pb->buffer.base, sizeof(uint8_t),
            pb->buffer.size, pb->source);
        if (bytes != pb->buffer.size)
                return;
        printf("Buffer data ready.\n");
        fibril_mutex_lock(&pb->mutex);
        int ret = audio_pcm_buffer_start_playback(pb->device, pb->buffer.id,
            SUBBUFFERS, sampling_rate, sample_size, channels, sign);
        if (ret != EOK) {
                fibril_mutex_unlock(&pb->mutex);
                printf("Failed to start playback: %s.\n", str_error(ret));
                return;
        }

        for (pb->playing = true; pb->playing;
          fibril_condvar_wait(&pb->cv, &pb->mutex));

        audio_pcm_buffer_stop_playback(pb->device, pb->buffer.id);
}

int main(int argc, char *argv[])
{
        const char *device = DEFAULT_DEVICE;
        const char *file;
        switch (argc) {
        case 2:
                file = argv[1];
                break;
        case 3:
                device = argv[1];
                file = argv[2];
                break;
        default:
                printf("Usage: %s [device] file.\n", argv[0]);
                return 1;
        }

        devman_handle_t pcm_handle;
        int ret = devman_fun_get_handle(device, &pcm_handle, 0);
        if (ret != EOK) {
                printf("Failed to get device(%s) handle: %s.\n",
                    device, str_error(ret));
                return 1;
        }

        async_sess_t *session = devman_device_connect(
            EXCHANGE_SERIALIZE, pcm_handle, IPC_FLAG_BLOCKING);
        if (!session) {
                printf("Failed to connect to device.\n");
                return 1;
        }

        async_exch_t *exch = async_exchange_begin(session);
        if (!exch) {
                printf("Failed to start session exchange.\n");
                async_hangup(session);
                return 1;
        }
        const char* info = NULL;
        ret = audio_pcm_buffer_get_info_str(exch, &info);
        if (ret != EOK) {
                printf("Failed to get PCM info.\n");
                async_exchange_end(exch);
                async_hangup(session);
                return 1;
        }
        printf("Playing on %s.\n", info);
        free(info);

        playback_t pb;
        playback_initialize(&pb, exch);

        ret = audio_pcm_buffer_get_buffer(pb.device, &pb.buffer.base,
            &pb.buffer.size, &pb.buffer.id, device_event_callback, &pb);
        if (ret != EOK) {
                printf("Failed to get PCM buffer: %s.\n", str_error(ret));
                async_exchange_end(exch);
                async_hangup(session);
                return 1;
        }
        printf("Buffer (%u): %p %zu.\n", pb.buffer.id, pb.buffer.base,
            pb.buffer.size);
        uintptr_t ptr = 0;
        as_get_physical_mapping(pb.buffer.base, &ptr);
        printf("buffer mapped at %x.\n", ptr);

        pb.source = fopen(file, "rb");
        if (pb.source == NULL) {
                printf("Failed to open %s.\n", file);
                munmap(pb.buffer.base, pb.buffer.size);
                audio_pcm_buffer_release_buffer(exch, pb.buffer.id);
                async_exchange_end(exch);
                async_hangup(session);
                return 1;
        }
        wave_header_t header;
        fread(&header, sizeof(header), 1, pb.source);
        unsigned rate, sample_size, channels;
        bool sign;
        const char *error;
        ret = wav_parse_header(&header, NULL, NULL, &rate, &sample_size,
            &channels, &sign, &error);
        if (ret != EOK) {
                printf("Error parsing wav header: %s.\n", error);
                fclose(pb.source);
                munmap(pb.buffer.base, pb.buffer.size);
                audio_pcm_buffer_release_buffer(exch, pb.buffer.id);
                async_exchange_end(exch);
                async_hangup(session);
                return 1;
        }

        play(&pb, rate, sample_size, channels, sign);

        munmap(pb.buffer.base, pb.buffer.size);
        audio_pcm_buffer_release_buffer(exch, pb.buffer.id);
        async_exchange_end(exch);
        async_hangup(session);
        return 0;
}
/**
 * @}
 */