mm-audio/aenc-g711/qdsp6/src/aenc_svr.c

/*--------------------------------------------------------------------------
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modification, are permitted provided that the following conditions are
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    * 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.
    * Neither the name of The Linux Foundation nor the names of its
      contributors may be used to endorse or promote products derived
      from this software without specific prior written permission.

THIS SOFTWARE IS PROVIDED "AS IS" AND ANY EXPRESS OR IMPLIED
WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT
ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS
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.
--------------------------------------------------------------------------*/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>

#include <fcntl.h>
#include <errno.h>
#include <unistd.h>

#include <aenc_svr.h>

/**
 @brief This function processes posted messages

 Once thread is being spawned, this function is run to
 start processing commands posted by client

 @param info pointer to context

 */
void *omx_g711_msg(void *info)
{
    struct g711_ipc_info *g711_info = (struct g711_ipc_info*)info;
    unsigned char id;
    ssize_t n;

    DEBUG_DETAIL("\n%s: message thread start\n", __FUNCTION__);
    while (!g711_info->dead)
    {
        n = read(g711_info->pipe_in, &id, 1);
        if (0 == n) break;
        if (1 == n)
        {
          DEBUG_DETAIL("\n%s-->pipe_in=%d pipe_out=%d\n",
                                               g711_info->thread_name,
                                               g711_info->pipe_in,
                                               g711_info->pipe_out);

            g711_info->process_msg_cb(g711_info->client_data, id);
        }
        if ((n < 0) && (errno != EINTR)) break;
    }
    DEBUG_DETAIL("%s: message thread stop\n", __FUNCTION__);

    return 0;
}

void *omx_g711_events(void *info)
{
    struct g711_ipc_info *g711_info = (struct g711_ipc_info*)info;
    unsigned char id = 0;

    DEBUG_DETAIL("%s: message thread start\n", g711_info->thread_name);
    g711_info->process_msg_cb(g711_info->client_data, id);
    DEBUG_DETAIL("%s: message thread stop\n", g711_info->thread_name);
    return 0;
}

/**
 @brief This function starts command server

 @param cb pointer to callback function from the client
 @param client_data reference client wants to get back
  through callback
 @return handle to msging thread
 */
struct g711_ipc_info *omx_g711_thread_create(
                                    message_func cb,
                                    void* client_data,
                                    char* th_name)
{
    int r;
    int fds[2];
    struct g711_ipc_info *g711_info;

    g711_info = calloc(1, sizeof(struct g711_ipc_info));
    if (!g711_info)
    {
        return 0;
    }

    g711_info->client_data = client_data;
    g711_info->process_msg_cb = cb;
    strlcpy(g711_info->thread_name, th_name, sizeof(g711_info->thread_name));

    if (pipe(fds))
    {
        DEBUG_PRINT_ERROR("\n%s: pipe creation failed\n", __FUNCTION__);
        goto fail_pipe;
    }

    g711_info->pipe_in = fds[0];
    g711_info->pipe_out = fds[1];

    r = pthread_create(&g711_info->thr, 0, omx_g711_msg, g711_info);
    if (r < 0) goto fail_thread;

    DEBUG_DETAIL("Created thread for %s \n", g711_info->thread_name);
    return g711_info;


fail_thread:
    close(g711_info->pipe_in);
    close(g711_info->pipe_out);

fail_pipe:
    free(g711_info);

    return 0;
}

/**
 *  @brief This function starts command server
 *
 *   @param cb pointer to callback function from the client
 *    @param client_data reference client wants to get back
 *      through callback
 *       @return handle to msging thread
 *        */
struct g711_ipc_info *omx_g711_event_thread_create(
                                    message_func cb,
                                    void* client_data,
                                    char* th_name)
{
    int r;
    int fds[2];
    struct g711_ipc_info *g711_info;

    g711_info = calloc(1, sizeof(struct g711_ipc_info));
    if (!g711_info)
    {
        return 0;
    }

    g711_info->client_data = client_data;
    g711_info->process_msg_cb = cb;
    strlcpy(g711_info->thread_name, th_name, sizeof(g711_info->thread_name));

    if (pipe(fds))
    {
        DEBUG_PRINT("\n%s: pipe creation failed\n", __FUNCTION__);
        goto fail_pipe;
    }

    g711_info->pipe_in = fds[0];
    g711_info->pipe_out = fds[1];

    r = pthread_create(&g711_info->thr, 0, omx_g711_events, g711_info);
    if (r < 0) goto fail_thread;

    DEBUG_DETAIL("Created thread for %s \n", g711_info->thread_name);
    return g711_info;


fail_thread:
    close(g711_info->pipe_in);
    close(g711_info->pipe_out);

fail_pipe:
    free(g711_info);

    return 0;
}

void omx_g711_thread_stop(struct g711_ipc_info *g711_info) {
    DEBUG_DETAIL("%s stop server\n", __FUNCTION__);
    close(g711_info->pipe_in);
    close(g711_info->pipe_out);
    pthread_join(g711_info->thr,NULL);
    g711_info->pipe_out = -1;
    g711_info->pipe_in = -1;
    DEBUG_DETAIL("%s: message thread close fds%d %d\n", g711_info->thread_name,
        g711_info->pipe_in,g711_info->pipe_out);
    free(g711_info);
}

void omx_g711_post_msg(struct g711_ipc_info *g711_info, unsigned char id) {
    DEBUG_DETAIL("\n%s id=%d\n", __FUNCTION__,id);
    write(g711_info->pipe_out, &id, 1);
}