C++ (Cpp) _snd_pcm_hw_params_internalの例

コード例 #1

ファイル: pcm_file.c プロジェクト: pombredanne/steamlink-sdk

static int snd_pcm_file_hw_params(snd_pcm_t *pcm, snd_pcm_hw_params_t * params)
{
	snd_pcm_file_t *file = pcm->private_data;
	unsigned int channel;
	snd_pcm_t *slave = file->gen.slave;
	int err = _snd_pcm_hw_params_internal(slave, params);
	if (err < 0)
		return err;
	file->buffer_bytes = snd_pcm_frames_to_bytes(slave, slave->buffer_size);
	file->wbuf_size = slave->buffer_size * 2;
	file->wbuf_size_bytes = snd_pcm_frames_to_bytes(slave, file->wbuf_size);
	file->wbuf_used_bytes = 0;
	assert(!file->wbuf);
	file->wbuf = malloc(file->wbuf_size_bytes);
	if (file->wbuf == NULL) {
		snd_pcm_file_hw_free(pcm);
		return -ENOMEM;
	}
	file->wbuf_areas = malloc(sizeof(*file->wbuf_areas) * slave->channels);
	if (file->wbuf_areas == NULL) {
		snd_pcm_file_hw_free(pcm);
		return -ENOMEM;
	}
	file->appl_ptr = file->file_ptr_bytes = 0;
	for (channel = 0; channel < slave->channels; ++channel) {
		snd_pcm_channel_area_t *a = &file->wbuf_areas[channel];
		a->addr = file->wbuf;
		a->first = slave->sample_bits * channel;
		a->step = slave->frame_bits;
	}
	if ((file->fd < 0) && (pcm->stream == SND_PCM_STREAM_PLAYBACK)) {
		err = snd_pcm_file_open_output_file(file);
		if (err < 0) {
			SYSERR("failed opening output file %s", file->fname);
			return err;
		}
	}
	return 0;
}

コード例 #2

ファイル: pcm_generic.c プロジェクト: limbahq/example-tomatoes

int snd_pcm_generic_hw_params(snd_pcm_t *pcm, snd_pcm_hw_params_t *params)
{
    snd_pcm_generic_t *generic = pcm->private_data;
    return _snd_pcm_hw_params_internal(generic->slave, params);
}