C++ (Cpp) write_to_soundcard Beispiele

Beispiel #1

Datei: pcm-sdl.c Projekt: eisnerd/rockbox

static void sdl_audio_callback(struct pcm_udata *udata, Uint8 *stream, int len)
{
    logf("sdl_audio_callback: len %d, pcm %d\n", len, pcm_data_size);
    udata->stream = stream;

    /* Write what we have in the PCM buffer */
    if (pcm_data_size > 0)
        goto start;

    /* Audio card wants more? Get some more then. */
    while (len > 0) {
        pcm_play_get_more_callback((void **)&pcm_data, &pcm_data_size);
    start:
        if (pcm_data_size != 0) {
            udata->num_in  = pcm_data_size / pcm_sample_bytes;
            udata->num_out = len / pcm_sample_bytes;

            write_to_soundcard(udata);

            udata->num_in  *= pcm_sample_bytes;
            udata->num_out *= pcm_sample_bytes;

            pcm_data      += udata->num_in;
            pcm_data_size -= udata->num_in;
            udata->stream += udata->num_out;
            len           -= udata->num_out;
        } else {
            DEBUGF("sdl_audio_callback: No Data.\n");
            break;
        }
    }
}

Beispiel #2

void sdl_audio_callback(struct pcm_udata *udata, Uint8 *stream, int len)
{
    udata->stream = stream;

    /* Write what we have in the PCM buffer */
    if (pcm_data_size > 0)
        goto start;

    /* Audio card wants more? Get some more then. */
    while (len > 0) {
        if ((ssize_t)pcm_data_size <= 0) {
            pcm_data_size = 0;

            if (pcm_callback_for_more)
                pcm_callback_for_more(&pcm_data, &pcm_data_size);
        }

        if (pcm_data_size > 0) {
start:
            udata->num_in  = pcm_data_size / pcm_sample_bytes;
            udata->num_out = len / pcm_sample_bytes;

            write_to_soundcard(udata);

            udata->num_in  *= pcm_sample_bytes;
            udata->num_out *= pcm_sample_bytes;

            pcm_data      += udata->num_in;
            pcm_data_size -= udata->num_in;
            udata->stream += udata->num_out;
            len           -= udata->num_out;
        } else {
            DEBUGF("sdl_audio_callback: No Data.\n");
            pcm_play_dma_stop();
            pcm_play_dma_stopped_callback();
            break;
        }
    }
}