C++ (Cpp) src_int_to_float_array Examples

Example #1

File: pcm_resample_libsamplerate.c Project: GunioRobot/mpd

const int32_t *
pcm_resample_lsr_32(struct pcm_resample_state *state,
		    uint8_t channels,
		    unsigned src_rate,
		    const int32_t *src_buffer, size_t src_size,
		    unsigned dest_rate, size_t *dest_size_r,
		    GError **error_r)
{
	bool success;
	SRC_DATA *data = &state->data;
	size_t data_in_size;
	size_t data_out_size;
	int error;
	int32_t *dest_buffer;

	assert((src_size % (sizeof(*src_buffer) * channels)) == 0);

	success = pcm_resample_set(state, channels, src_rate, dest_rate,
				   error_r);
	if (!success)
		return NULL;

	/* there was an error previously, and nothing has changed */
	if (state->error) {
		g_set_error(error_r, libsamplerate_quark(), state->error,
			    "libsamplerate has failed: %s",
			    src_strerror(state->error));
		return NULL;
	}

	data->input_frames = src_size / sizeof(*src_buffer) / channels;
	data_in_size = data->input_frames * sizeof(float) * channels;
	data->data_in = pcm_buffer_get(&state->in, data_in_size);

	data->output_frames = (src_size * dest_rate + src_rate - 1) / src_rate;
	data_out_size = data->output_frames * sizeof(float) * channels;
	data->data_out = pcm_buffer_get(&state->out, data_out_size);

	src_int_to_float_array(src_buffer, data->data_in,
			       data->input_frames * channels);

	error = src_process(state->state, data);
	if (error) {
		g_set_error(error_r, libsamplerate_quark(), error,
			    "libsamplerate has failed: %s",
			    src_strerror(error));
		state->error = error;
		return NULL;
	}

	*dest_size_r = data->output_frames_gen *
		sizeof(*dest_buffer) * channels;
	dest_buffer = pcm_buffer_get(&state->buffer, *dest_size_r);
	src_float_to_int_array(data->data_out, dest_buffer,
			       data->output_frames_gen * channels);

	return dest_buffer;
}

Example #2

File: pcm_resample_libsamplerate.c Project: Acidburn0zzz/mpd

const int32_t *
pcm_resample_lsr_32(struct pcm_resample_state *state,
		    unsigned channels,
		    unsigned src_rate,
		    const int32_t *src_buffer, size_t src_size,
		    unsigned dest_rate, size_t *dest_size_r,
		    GError **error_r)
{
	bool success;
	SRC_DATA *data = &state->data;
	size_t data_in_size;
	size_t data_out_size;
	int32_t *dest_buffer;

	assert((src_size % (sizeof(*src_buffer) * channels)) == 0);

	success = pcm_resample_set(state, channels, src_rate, dest_rate,
				   error_r);
	if (!success)
		return NULL;

	data->input_frames = src_size / sizeof(*src_buffer) / channels;
	data_in_size = data->input_frames * sizeof(float) * channels;
	data->data_in = pcm_buffer_get(&state->in, data_in_size);

	data->output_frames = (src_size * dest_rate + src_rate - 1) / src_rate;
	data_out_size = data->output_frames * sizeof(float) * channels;
	data->data_out = pcm_buffer_get(&state->out, data_out_size);

	src_int_to_float_array(src_buffer, data->data_in,
			       data->input_frames * channels);

	if (!lsr_process(state, error_r))
		return NULL;

	*dest_size_r = data->output_frames_gen *
		sizeof(*dest_buffer) * channels;
	dest_buffer = pcm_buffer_get(&state->buffer, *dest_size_r);
	src_float_to_int_array(data->data_out, dest_buffer,
			       data->output_frames_gen * channels);

	return dest_buffer;
}