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path: root/src/decoder/plugins/WavpackDecoderPlugin.cxx
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-rw-r--r--src/decoder/plugins/WavpackDecoderPlugin.cxx573
1 files changed, 573 insertions, 0 deletions
diff --git a/src/decoder/plugins/WavpackDecoderPlugin.cxx b/src/decoder/plugins/WavpackDecoderPlugin.cxx
new file mode 100644
index 000000000..2f60090c1
--- /dev/null
+++ b/src/decoder/plugins/WavpackDecoderPlugin.cxx
@@ -0,0 +1,573 @@
+/*
+ * Copyright (C) 2003-2014 The Music Player Daemon Project
+ * http://www.musicpd.org
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ */
+
+#include "config.h"
+#include "WavpackDecoderPlugin.hxx"
+#include "../DecoderAPI.hxx"
+#include "input/InputStream.hxx"
+#include "CheckAudioFormat.hxx"
+#include "tag/TagHandler.hxx"
+#include "tag/ApeTag.hxx"
+#include "fs/Path.hxx"
+#include "util/Error.hxx"
+#include "util/Domain.hxx"
+#include "util/Macros.hxx"
+#include "Log.hxx"
+
+#include <wavpack/wavpack.h>
+#include <glib.h>
+
+#include <assert.h>
+#include <stdio.h>
+#include <stdlib.h>
+
+#define ERRORLEN 80
+
+static constexpr Domain wavpack_domain("wavpack");
+
+/** A pointer type for format converter function. */
+typedef void (*format_samples_t)(
+ int bytes_per_sample,
+ void *buffer, uint32_t count
+);
+
+/*
+ * This function has been borrowed from the tiny player found on
+ * wavpack.com. Modifications were required because mpd only handles
+ * max 24-bit samples.
+ */
+static void
+format_samples_int(int bytes_per_sample, void *buffer, uint32_t count)
+{
+ int32_t *src = (int32_t *)buffer;
+
+ switch (bytes_per_sample) {
+ case 1: {
+ int8_t *dst = (int8_t *)buffer;
+ /*
+ * The asserts like the following one are because we do the
+ * formatting of samples within a single buffer. The size
+ * of the output samples never can be greater than the size
+ * of the input ones. Otherwise we would have an overflow.
+ */
+ static_assert(sizeof(*dst) <= sizeof(*src), "Wrong size");
+
+ /* pass through and align 8-bit samples */
+ while (count--) {
+ *dst++ = *src++;
+ }
+ break;
+ }
+ case 2: {
+ uint16_t *dst = (uint16_t *)buffer;
+ static_assert(sizeof(*dst) <= sizeof(*src), "Wrong size");
+
+ /* pass through and align 16-bit samples */
+ while (count--) {
+ *dst++ = *src++;
+ }
+ break;
+ }
+
+ case 3:
+ case 4:
+ /* do nothing */
+ break;
+ }
+}
+
+/*
+ * This function converts floating point sample data to 24-bit integer.
+ */
+static void
+format_samples_float(gcc_unused int bytes_per_sample, void *buffer,
+ uint32_t count)
+{
+ float *p = (float *)buffer;
+
+ while (count--) {
+ *p /= (1 << 23);
+ ++p;
+ }
+}
+
+/**
+ * Choose a MPD sample format from libwavpacks' number of bits.
+ */
+static SampleFormat
+wavpack_bits_to_sample_format(bool is_float, int bytes_per_sample)
+{
+ if (is_float)
+ return SampleFormat::FLOAT;
+
+ switch (bytes_per_sample) {
+ case 1:
+ return SampleFormat::S8;
+
+ case 2:
+ return SampleFormat::S16;
+
+ case 3:
+ return SampleFormat::S24_P32;
+
+ case 4:
+ return SampleFormat::S32;
+
+ default:
+ return SampleFormat::UNDEFINED;
+ }
+}
+
+/*
+ * This does the main decoding thing.
+ * Requires an already opened WavpackContext.
+ */
+static void
+wavpack_decode(Decoder &decoder, WavpackContext *wpc, bool can_seek)
+{
+ bool is_float = (WavpackGetMode(wpc) & MODE_FLOAT) != 0;
+ SampleFormat sample_format =
+ wavpack_bits_to_sample_format(is_float,
+ WavpackGetBytesPerSample(wpc));
+
+ Error error;
+ AudioFormat audio_format;
+ if (!audio_format_init_checked(audio_format,
+ WavpackGetSampleRate(wpc),
+ sample_format,
+ WavpackGetNumChannels(wpc), error)) {
+ LogError(error);
+ return;
+ }
+
+ const format_samples_t format_samples = is_float
+ ? format_samples_float
+ : format_samples_int;
+
+ const float total_time = float(WavpackGetNumSamples(wpc))
+ / audio_format.sample_rate;
+
+ const int bytes_per_sample = WavpackGetBytesPerSample(wpc);
+ const int output_sample_size = audio_format.GetFrameSize();
+
+ /* wavpack gives us all kind of samples in a 32-bit space */
+ int32_t chunk[1024];
+ const uint32_t samples_requested = ARRAY_SIZE(chunk) /
+ audio_format.channels;
+
+ decoder_initialized(decoder, audio_format, can_seek, total_time);
+
+ DecoderCommand cmd = decoder_get_command(decoder);
+ while (cmd != DecoderCommand::STOP) {
+ if (cmd == DecoderCommand::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, nullptr, chunk,
+ samples_got * output_sample_size,
+ bitrate);
+ }
+}
+
+/**
+ * Locate and parse a floating point tag. Returns true if it was
+ * found.
+ */
+static bool
+wavpack_tag_float(WavpackContext *wpc, const char *key, float *value_r)
+{
+ char buffer[64];
+ if (WavpackGetTagItem(wpc, key, buffer, sizeof(buffer)) <= 0)
+ return false;
+
+ *value_r = atof(buffer);
+ return true;
+}
+
+static bool
+wavpack_replaygain(ReplayGainInfo &rgi,
+ WavpackContext *wpc)
+{
+ rgi.Clear();
+
+ bool found = false;
+ found |= wavpack_tag_float(wpc, "replaygain_track_gain",
+ &rgi.tuples[REPLAY_GAIN_TRACK].gain);
+ found |= wavpack_tag_float(wpc, "replaygain_track_peak",
+ &rgi.tuples[REPLAY_GAIN_TRACK].peak);
+ found |= wavpack_tag_float(wpc, "replaygain_album_gain",
+ &rgi.tuples[REPLAY_GAIN_ALBUM].gain);
+ found |= wavpack_tag_float(wpc, "replaygain_album_peak",
+ &rgi.tuples[REPLAY_GAIN_ALBUM].peak);
+
+ return found;
+}
+
+static void
+wavpack_scan_tag_item(WavpackContext *wpc, const char *name,
+ TagType type,
+ const struct tag_handler *handler, void *handler_ctx)
+{
+ char buffer[1024];
+ int len = WavpackGetTagItem(wpc, name, buffer, sizeof(buffer));
+ if (len <= 0 || (unsigned)len >= sizeof(buffer))
+ return;
+
+ tag_handler_invoke_tag(handler, handler_ctx, type, buffer);
+
+}
+
+static void
+wavpack_scan_pair(WavpackContext *wpc, const char *name,
+ const struct tag_handler *handler, void *handler_ctx)
+{
+ char buffer[8192];
+ int len = WavpackGetTagItem(wpc, name, buffer, sizeof(buffer));
+ if (len <= 0 || (unsigned)len >= sizeof(buffer))
+ return;
+
+ tag_handler_invoke_pair(handler, handler_ctx, name, buffer);
+}
+
+/*
+ * Reads metainfo from the specified file.
+ */
+static bool
+wavpack_scan_file(Path path_fs,
+ const struct tag_handler *handler, void *handler_ctx)
+{
+ char error[ERRORLEN];
+ WavpackContext *wpc = WavpackOpenFileInput(path_fs.c_str(), error,
+ OPEN_TAGS, 0);
+ if (wpc == nullptr) {
+ FormatError(wavpack_domain,
+ "failed to open WavPack file \"%s\": %s",
+ path_fs.c_str(), error);
+ return false;
+ }
+
+ tag_handler_invoke_duration(handler, handler_ctx,
+ WavpackGetNumSamples(wpc) /
+ WavpackGetSampleRate(wpc));
+
+ /* the WavPack format implies APEv2 tags, which means we can
+ reuse the mapping from tag_ape.c */
+
+ for (unsigned i = 0; i < TAG_NUM_OF_ITEM_TYPES; ++i) {
+ const char *name = tag_item_names[i];
+ if (name != nullptr)
+ wavpack_scan_tag_item(wpc, name, (TagType)i,
+ handler, handler_ctx);
+ }
+
+ for (const struct tag_table *i = ape_tags; i->name != nullptr; ++i)
+ wavpack_scan_tag_item(wpc, i->name, i->type,
+ handler, handler_ctx);
+
+ if (handler->pair != nullptr) {
+ char name[64];
+
+ for (int i = 0, n = WavpackGetNumTagItems(wpc);
+ i < n; ++i) {
+ int len = WavpackGetTagItemIndexed(wpc, i, name,
+ sizeof(name));
+ if (len <= 0 || (unsigned)len >= sizeof(name))
+ continue;
+
+ wavpack_scan_pair(wpc, name, handler, handler_ctx);
+ }
+ }
+
+ WavpackCloseFile(wpc);
+
+ return true;
+}
+
+/*
+ * mpd input_stream <=> WavpackStreamReader wrapper callbacks
+ */
+
+/* This struct is needed for per-stream last_byte storage. */
+struct WavpackInput {
+ Decoder &decoder;
+ InputStream &is;
+ /* Needed for push_back_byte() */
+ int last_byte;
+
+ constexpr WavpackInput(Decoder &_decoder, InputStream &_is)
+ :decoder(_decoder), is(_is), last_byte(EOF) {}
+
+ int32_t ReadBytes(void *data, size_t bcount);
+};
+
+/**
+ * Little wrapper for struct WavpackInput to cast from void *.
+ */
+static WavpackInput *
+wpin(void *id)
+{
+ assert(id);
+ return (WavpackInput *)id;
+}
+
+static int32_t
+wavpack_input_read_bytes(void *id, void *data, int32_t bcount)
+{
+ return wpin(id)->ReadBytes(data, bcount);
+}
+
+int32_t
+WavpackInput::ReadBytes(void *data, size_t bcount)
+{
+ uint8_t *buf = (uint8_t *)data;
+ int32_t i = 0;
+
+ if (last_byte != EOF) {
+ *buf++ = last_byte;
+ last_byte = EOF;
+ --bcount;
+ ++i;
+ }
+
+ /* wavpack fails if we return a partial read, so we just wait
+ until the buffer is full */
+ while (bcount > 0) {
+ size_t nbytes = decoder_read(&decoder, is, buf, bcount);
+ if (nbytes == 0) {
+ /* EOF, error or a decoder command */
+ break;
+ }
+
+ i += nbytes;
+ bcount -= nbytes;
+ buf += nbytes;
+ }
+
+ return i;
+}
+
+static uint32_t
+wavpack_input_get_pos(void *id)
+{
+ return wpin(id)->is.GetOffset();
+}
+
+static int
+wavpack_input_set_pos_abs(void *id, uint32_t pos)
+{
+ return wpin(id)->is.LockSeek(pos, IgnoreError()) ? 0 : -1;
+}
+
+static int
+wavpack_input_set_pos_rel(void *id, int32_t delta, int mode)
+{
+ InputStream &is = wpin(id)->is;
+
+ InputStream::offset_type offset = delta;
+ switch (mode) {
+ case SEEK_SET:
+ break;
+
+ case SEEK_CUR:
+ offset += is.GetOffset();
+ break;
+
+ case SEEK_END:
+ if (!is.KnownSize())
+ return -1;
+
+ offset += is.GetSize();
+ break;
+
+ default:
+ return -1;
+ }
+
+ return is.LockSeek(offset, IgnoreError()) ? 0 : -1;
+}
+
+static int
+wavpack_input_push_back_byte(void *id, int c)
+{
+ if (wpin(id)->last_byte == EOF) {
+ wpin(id)->last_byte = c;
+ return c;
+ } else {
+ return EOF;
+ }
+}
+
+static uint32_t
+wavpack_input_get_length(void *id)
+{
+ if (!wpin(id)->is.KnownSize())
+ return 0;
+
+ return wpin(id)->is.GetSize();
+}
+
+static int
+wavpack_input_can_seek(void *id)
+{
+ return wpin(id)->is.IsSeekable();
+}
+
+static WavpackStreamReader mpd_is_reader = {
+ wavpack_input_read_bytes,
+ wavpack_input_get_pos,
+ wavpack_input_set_pos_abs,
+ wavpack_input_set_pos_rel,
+ wavpack_input_push_back_byte,
+ wavpack_input_get_length,
+ wavpack_input_can_seek,
+ nullptr /* no need to write edited tags */
+};
+
+static WavpackInput *
+wavpack_open_wvc(Decoder &decoder, const char *uri)
+{
+ /*
+ * As we use dc->utf8url, this function will be bad for
+ * single files. utf8url is not absolute file path :/
+ */
+ if (uri == nullptr)
+ return nullptr;
+
+ char *wvc_url = g_strconcat(uri, "c", nullptr);
+
+ InputStream *is_wvc = decoder_open_uri(decoder, uri, IgnoreError());
+ g_free(wvc_url);
+
+ if (is_wvc == nullptr)
+ return nullptr;
+
+ return new WavpackInput(decoder, *is_wvc);
+}
+
+/*
+ * Decodes a stream.
+ */
+static void
+wavpack_streamdecode(Decoder &decoder, InputStream &is)
+{
+ int open_flags = OPEN_NORMALIZE;
+ bool can_seek = is.IsSeekable();
+
+ WavpackInput *wvc = wavpack_open_wvc(decoder, is.GetURI());
+ if (wvc != nullptr) {
+ open_flags |= OPEN_WVC;
+ can_seek &= wvc->is.IsSeekable();
+ }
+
+ if (!can_seek) {
+ open_flags |= OPEN_STREAMING;
+ }
+
+ WavpackInput isp(decoder, is);
+
+ char error[ERRORLEN];
+ WavpackContext *wpc =
+ WavpackOpenFileInputEx(&mpd_is_reader, &isp, wvc,
+ error, open_flags, 23);
+
+ if (wpc == nullptr) {
+ FormatError(wavpack_domain,
+ "failed to open WavPack stream: %s", error);
+ return;
+ }
+
+ wavpack_decode(decoder, wpc, can_seek);
+
+ WavpackCloseFile(wpc);
+
+ if (wvc != nullptr) {
+ delete &wvc->is;
+ delete wvc;
+ }
+}
+
+/*
+ * Decodes a file.
+ */
+static void
+wavpack_filedecode(Decoder &decoder, Path path_fs)
+{
+ char error[ERRORLEN];
+ WavpackContext *wpc = WavpackOpenFileInput(path_fs.c_str(), error,
+ OPEN_TAGS | OPEN_WVC | OPEN_NORMALIZE,
+ 23);
+ if (wpc == nullptr) {
+ FormatWarning(wavpack_domain,
+ "failed to open WavPack file \"%s\": %s",
+ path_fs.c_str(), error);
+ return;
+ }
+
+ ReplayGainInfo rgi;
+ if (wavpack_replaygain(rgi, wpc))
+ decoder_replay_gain(decoder, &rgi);
+
+ wavpack_decode(decoder, wpc, true);
+
+ WavpackCloseFile(wpc);
+}
+
+static char const *const wavpack_suffixes[] = {
+ "wv",
+ nullptr
+};
+
+static char const *const wavpack_mime_types[] = {
+ "audio/x-wavpack",
+ nullptr
+};
+
+const struct DecoderPlugin wavpack_decoder_plugin = {
+ "wavpack",
+ nullptr,
+ nullptr,
+ wavpack_streamdecode,
+ wavpack_filedecode,
+ wavpack_scan_file,
+ nullptr,
+ nullptr,
+ wavpack_suffixes,
+ wavpack_mime_types
+};
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