Method FillBufferSameRate

src/audio_resampler.cpp:423–496

}

int AudioResampler::FillBufferSameRate(uint8_t* buffer, int length) {
	const int input_samplesize = AudioDecoder::GetSamplesizeForFormat(input_format);
	const int output_samplesize = AudioDecoder::GetSamplesizeForFormat(output_format);
	//The buffer size has to be a multiple of a frame
	const int buffer_size=sizeof(internal_buffer) - sizeof(internal_buffer)%(nr_of_channels*input_samplesize);

	int total_output_frames = length / (output_samplesize*nr_of_channels);
	int amount_of_data_to_read = 0;
	int amount_of_data_read = total_output_frames*nr_of_channels;

	int decoded = 0;

	if (input_samplesize > output_samplesize) {
		//It is necessary to use the internal_buffer to convert the samples.
		while (total_output_frames > 0) {
			amount_of_data_to_read = buffer_size / input_samplesize;

			//limit amount_of_data_to_read in the last loop
			amount_of_data_to_read = (amount_of_data_to_read > total_output_frames) ? total_output_frames : amount_of_data_to_read;

			switch (output_format) {
				case AudioDecoder::Format::F32:
				amount_of_data_read = DecodeAndConvertFloat(wrapped_decoder.get(), internal_buffer, amount_of_data_to_read, input_samplesize, input_format);
				break;
			#ifdef HAVE_LIBSPEEXDSP
				case AudioDecoder::Format::S16:
				amount_of_data_read = DecodeAndConvertInt16(wrapped_decoder.get(), internal_buffer, amount_of_data_to_read, input_samplesize, input_format);
				break;
			#endif
				default: error_message = "internal error: output_format is not convertable"; return ERROR;
			}
			if (amount_of_data_read < 0) {
				error_message = wrapped_decoder->GetError();
				return amount_of_data_read; //error occured
			}

			//Copy the converted samples
			for (int i = 0; i < amount_of_data_read*output_samplesize; i++) {
				buffer[i] = internal_buffer[i];
			}
			//Prepare next loop
			total_output_frames -= amount_of_data_read;
			decoded += amount_of_data_read;
			buffer += amount_of_data_read*output_samplesize;

			//If the end of the decoder is reached (it has finished)
			if (amount_of_data_read < amount_of_data_to_read) {
				break;
			}

		}
	} else {
		//It is possible to work inplace as length is specified for the output samplesize.
		switch (output_format) {
			case AudioDecoder::Format::F32:
			decoded = DecodeAndConvertFloat(wrapped_decoder.get(), buffer, amount_of_data_read, input_samplesize, input_format);
			break;
		#ifdef HAVE_LIBSPEEXDSP