Ejemplo n.º 1
0
static int wav_get_bitrate (void *prv_data)
{
	struct wavpack_data *data = (struct wavpack_data *)prv_data;

	int bitrate;
	bitrate = WavpackGetInstantBitrate (data->wpc) / 1000;

	return (bitrate == 0)? data->avg_bitrate : bitrate;
}
Ejemplo n.º 2
0
EmErrorCode WvDecoder::DecodeUnit(char* data, uint32_t& used, uint32_t& unitCount)
{
    if (m_UnitIndex < m_UnitCount) {
        unitCount = 1;

        // according to wavpack's source code cli/wvunpack.c
        uint32_t nsamples = WavpackUnpackSamples(m_Ctx, (int32_t*)&m_Buf[0], unitCount*m_Channels);

        format_samples(m_BytesPerSample, (unsigned char*)data, &m_Buf[0], nsamples*m_Channels);
        used = nsamples * m_BytesPerSample * m_Channels;

        m_UnitIndex += unitCount;
        m_BitRate = WavpackGetInstantBitrate(m_Ctx)/1000;

        return ErrorCode::Ok;
    }

    used = 0;
    unitCount = m_UnitCount;

    m_BitRate = 0;

    return ErrorCode::DecoderOutOfRange;
}
Ejemplo n.º 3
0
/*
 * This does the main decoding thing.
 * Requires an already opened WavpackContext.
 */
static void
wavpack_decode(struct decoder *decoder, WavpackContext *wpc, bool can_seek,
	       struct replay_gain_info *replay_gain_info)
{
	struct audio_format audio_format;
	format_samples_t format_samples;
	char chunk[CHUNK_SIZE];
	int samples_requested, samples_got;
	float total_time, current_time;
	int bytes_per_sample, output_sample_size;
	int position;

	audio_format.sample_rate = WavpackGetSampleRate(wpc);
	audio_format.channels = WavpackGetReducedChannels(wpc);
	audio_format.bits = WavpackGetBitsPerSample(wpc);

	/* round bitwidth to 8-bit units */
	audio_format.bits = (audio_format.bits + 7) & (~7);
	/* mpd handles max 24-bit samples */
	if (audio_format.bits > 24) {
		audio_format.bits = 24;
	}

	if (!audio_format_valid(&audio_format)) {
		g_warning("Invalid audio format: %u:%u:%u\n",
			  audio_format.sample_rate,
			  audio_format.bits,
			  audio_format.channels);
		return;
	}

	if ((WavpackGetMode(wpc) & MODE_FLOAT) == MODE_FLOAT) {
		format_samples = format_samples_float;
	} else {
		format_samples = format_samples_int;
	}

	total_time = WavpackGetNumSamples(wpc);
	total_time /= audio_format.sample_rate;
	bytes_per_sample = WavpackGetBytesPerSample(wpc);
	output_sample_size = audio_format_frame_size(&audio_format);

	/* wavpack gives us all kind of samples in a 32-bit space */
	samples_requested = sizeof(chunk) / (4 * audio_format.channels);

	decoder_initialized(decoder, &audio_format, can_seek, total_time);

	position = 0;

	do {
		if (decoder_get_command(decoder) == DECODE_COMMAND_SEEK) {
			if (can_seek) {
				int where;

				where = decoder_seek_where(decoder);
				where *= audio_format.sample_rate;
				if (WavpackSeekSample(wpc, where)) {
					position = where;
					decoder_command_finished(decoder);
				} else {
					decoder_seek_error(decoder);
				}
			} else {
				decoder_seek_error(decoder);
			}
		}

		if (decoder_get_command(decoder) == DECODE_COMMAND_STOP) {
			break;
		}

		samples_got = WavpackUnpackSamples(
			wpc, (int32_t *)chunk, samples_requested
		);
		if (samples_got > 0) {
			int bitrate = (int)(WavpackGetInstantBitrate(wpc) /
			              1000 + 0.5);
			position += samples_got;
			current_time = position;
			current_time /= audio_format.sample_rate;

			format_samples(
				bytes_per_sample, chunk,
				samples_got * audio_format.channels
			);

			decoder_data(
				decoder, NULL, chunk,
				samples_got * output_sample_size,
				current_time, bitrate,
				replay_gain_info
			);
		}
	} while (samples_got > 0);
}
Ejemplo n.º 4
0
static int
wv_read (DB_fileinfo_t *_info, char *bytes, int size) {
    wvctx_t *info = (wvctx_t *)_info;
    int currentsample = WavpackGetSampleIndex (info->ctx);
    int samplesize = _info->fmt.channels * _info->fmt.bps / 8;
    if (size / samplesize + currentsample > info->endsample) {
        size = (info->endsample - currentsample + 1) * samplesize;
        trace ("wv: size truncated to %d bytes (%d samples), cursample=%d, endsample=%d\n", size, info->endsample - currentsample + 1, currentsample, info->endsample);
        if (size <= 0) {
            return 0;
        }
    }
    int initsize = size;
    int n;
    if (WavpackGetMode (info->ctx) & MODE_FLOAT) {
        _info->fmt.is_float = 1;
    }
    if (_info->fmt.is_float || _info->fmt.bps == 32) {
        n = WavpackUnpackSamples (info->ctx, (int32_t *)bytes, size / samplesize);
        size -= n * samplesize;
    }
    else {
        int32_t buffer[size/(_info->fmt.bps / 8)];
        n = WavpackUnpackSamples (info->ctx, (int32_t *)buffer, size / samplesize);
        size -= n * samplesize;
        n *= _info->fmt.channels;

        // convert from int32 to input (what???)
        int32_t *p = buffer;
        if (_info->fmt.bps == 16) {
            while (n > 0) {
                *((int16_t *)bytes) = (int16_t)(*p);
                bytes += sizeof (int16_t);
                p++;
                n--;
            }
        }
        else if (_info->fmt.bps == 8) {
            while (n > 0) {
                *bytes++ = (char)(*p);
                p++;
                n--;
            }
        }
        else if (_info->fmt.bps == 24) {
            while (n > 0) {
                *bytes++ = (*p)&0xff;
                *bytes++ = ((*p)&0xff00)>>8;
                *bytes++ = ((*p)&0xff0000)>>16;
                p++;
                n--;
            }
        }
    }
    _info->readpos = (float)(WavpackGetSampleIndex (info->ctx)-info->startsample)/WavpackGetSampleRate (info->ctx);

#ifndef TINYWV
    deadbeef->streamer_set_bitrate (WavpackGetInstantBitrate (info->ctx) / 1000);
#endif

    return initsize-size;
}
Ejemplo n.º 5
0
/*
 * This does the main decoding thing.
 * Requires an already opened WavpackContext.
 */
static void
wavpack_decode(struct decoder *decoder, WavpackContext *wpc, bool can_seek)
{
	GError *error = NULL;
	bool is_float;
	enum sample_format sample_format;
	struct audio_format audio_format;
	format_samples_t format_samples;
	float total_time;
	int bytes_per_sample, output_sample_size;

	is_float = (WavpackGetMode(wpc) & MODE_FLOAT) != 0;
	sample_format =
		wavpack_bits_to_sample_format(is_float,
					      WavpackGetBytesPerSample(wpc));

	if (!audio_format_init_checked(&audio_format,
				       WavpackGetSampleRate(wpc),
				       sample_format,
				       WavpackGetNumChannels(wpc), &error)) {
		g_warning("%s", error->message);
		g_error_free(error);
		return;
	}

	if (is_float) {
		format_samples = format_samples_float;
	} else {
		format_samples = format_samples_int;
	}

	total_time = WavpackGetNumSamples(wpc);
	total_time /= audio_format.sample_rate;
	bytes_per_sample = WavpackGetBytesPerSample(wpc);
	output_sample_size = audio_format_frame_size(&audio_format);

	/* wavpack gives us all kind of samples in a 32-bit space */
	int32_t chunk[1024];
	const uint32_t samples_requested = G_N_ELEMENTS(chunk) /
		audio_format.channels;

	decoder_initialized(decoder, &audio_format, can_seek, total_time);

	enum decoder_command cmd = decoder_get_command(decoder);
	while (cmd != DECODE_COMMAND_STOP) {
		if (cmd == DECODE_COMMAND_SEEK) {
			if (can_seek) {
				unsigned where = decoder_seek_where(decoder) *
					audio_format.sample_rate;

				if (WavpackSeekSample(wpc, where)) {
					decoder_command_finished(decoder);
				} else {
					decoder_seek_error(decoder);
				}
			} else {
				decoder_seek_error(decoder);
			}
		}

		uint32_t samples_got = WavpackUnpackSamples(wpc, chunk,
							    samples_requested);
		if (samples_got == 0)
			break;

		int bitrate = (int)(WavpackGetInstantBitrate(wpc) / 1000 +
				    0.5);
		format_samples(bytes_per_sample, chunk,
			       samples_got * audio_format.channels);

		cmd = decoder_data(decoder, NULL, chunk,
				   samples_got * output_sample_size,
				   bitrate);
	}
}