C++ (Cpp) pcm_play Examples

Example #1

File: playwav.c Project: AOSP-JF/platform_system_extras

void play_file(unsigned rate, unsigned channels,
               int fd, unsigned count)
{
    next = malloc(count);
    if (!next) {
        fprintf(stderr,"could not allocate %d bytes\n", count);
        return;
    }
    if (read(fd, next, count) != count) {
        fprintf(stderr,"could not read %d bytes\n", count);
        return;
    }
    avail = count;
    pcm_play(rate, channels, fill_buffer, 0);
}

Example #2

File: talsa.c Project: tanhuacheng/Documents

int main(int argc, char *argv[])
{
    (void)argc;
    (void)argv;

    if (pcm_open() < 0) {
        printf("pcm_open error\n");
        return 1;
    }

    int16_t data16[] = {
        0, 11585, 16384, 11585, 0, -11585, -16384, -11585,
        0, 11585, 16384, 11585, 0, -11585, -16384, -11585,
        0, 11585, 16384, 11585, 0, -11585, -16384, -11585,
        0, 11585, 16384, 11585, 0, -11585, -16384, -11585,
        0, 11585, 16384, 11585, 0, -11585, -16384, -11585,
        0, 11585, 16384, 11585, 0, -11585, -16384, -11585,
        0, 11585, 16384, 11585, 0, -11585, -16384, -11585,
        0, 11585, 16384, 11585, 0, -11585, -16384, -11585,
        0, 11585, 16384, 11585, 0, -11585, -16384, -11585,
        0, 11585, 16384, 11585, 0, -11585, -16384, -11585,
        0, 11585, 16384, 11585, 0, -11585, -16384, -11585,
        0, 11585, 16384, 11585, 0, -11585, -16384, -11585,
        0, 11585, 16384, 11585, 0, -11585, -16384, -11585,
        0, 11585, 16384, 11585, 0, -11585, -16384, -11585,
        0, 11585, 16384, 11585, 0, -11585, -16384, -11585,
        0, 11585, 16384, 11585, 0, -11585, -16384, -11585,
        0, 11585, 16384, 11585, 0, -11585, -16384, -11585,
        0, 11585, 16384, 11585, 0, -11585, -16384, -11585,
        0, 11585, 16384, 11585, 0, -11585, -16384, -11585,
        0, 11585, 16384, 11585, 0, -11585, -16384, -11585,
    };

    char data8[sizeof(data16) / sizeof(data16[0])];
    for (int i = 0; i < (int)sizeof(data8); i++) {
        data8[i] = data16[i] >> 8;
    }

    int count = 5 * 10; // 10s

    while (count--) {
        pcm_play((void*)data16, sizeof(data16));
    }

    pcm_close();

    return 0;
}

Example #3

static void play_file(struct audtest_config *config, unsigned rate, unsigned channels,
                      int fd, unsigned count)
{
	next = (char*)malloc(count);
	printf(" play_file: count=%d,next=%p\n", count,next);
	if (!next) {
		fprintf(stderr,"could not allocate %d bytes\n", count);
		return;
	}
	if (read(fd, next, count) != count) {
		fprintf(stderr,"could not read %d bytes\n", count);
		return;
	}
	avail = count;
	pcm_play(config, rate, channels, fill_buffer, 0);
}