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authorMax Kellermann <max@duempel.org>2010-01-04 21:36:33 +0100
committerMax Kellermann <max@duempel.org>2010-01-04 21:45:32 +0100
commit9b9abff97272b52f133ff23addd58b6a90a49a73 (patch)
tree1790e9c10485b30a2ea84ce5923d26bf8c91c688 /src/decoder/wavpack_decoder_plugin.c
parentc69cc31de0818f8bf42431dcbc1f9de4451a0456 (diff)
downloadmpd-9b9abff97272b52f133ff23addd58b6a90a49a73.tar.gz
mpd-9b9abff97272b52f133ff23addd58b6a90a49a73.tar.xz
mpd-9b9abff97272b52f133ff23addd58b6a90a49a73.zip
renamed decoder plugin sources
Make it X_decoder_plugin.c.
Diffstat (limited to 'src/decoder/wavpack_decoder_plugin.c')
-rw-r--r--src/decoder/wavpack_decoder_plugin.c603
1 files changed, 603 insertions, 0 deletions
diff --git a/src/decoder/wavpack_decoder_plugin.c b/src/decoder/wavpack_decoder_plugin.c
new file mode 100644
index 000000000..380985f85
--- /dev/null
+++ b/src/decoder/wavpack_decoder_plugin.c
@@ -0,0 +1,603 @@
+/*
+ * Copyright (C) 2003-2010 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 "decoder_api.h"
+#include "audio_check.h"
+#include "path.h"
+#include "utils.h"
+
+#include <wavpack/wavpack.h>
+#include <glib.h>
+
+#include <assert.h>
+#include <unistd.h>
+#include <stdio.h>
+#include <stdlib.h>
+
+#undef G_LOG_DOMAIN
+#define G_LOG_DOMAIN "wavpack"
+
+/* pick 1020 since its devisible for 8,16,24, and 32-bit audio */
+#define CHUNK_SIZE 1020
+
+#define ERRORLEN 80
+
+static struct {
+ const char *name;
+ enum tag_type type;
+} tagtypes[] = {
+ { "artist", TAG_ARTIST },
+ { "album", TAG_ALBUM },
+ { "title", TAG_TITLE },
+ { "track", TAG_TRACK },
+ { "name", TAG_NAME },
+ { "genre", TAG_GENRE },
+ { "date", TAG_DATE },
+ { "composer", TAG_COMPOSER },
+ { "performer", TAG_PERFORMER },
+ { "comment", TAG_COMMENT },
+ { "disc", TAG_DISC },
+};
+
+/** 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 = buffer;
+
+ switch (bytes_per_sample) {
+ case 1: {
+ int8_t *dst = 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.
+ */
+ assert_static(sizeof(*dst) <= sizeof(*src));
+
+ /* pass through and align 8-bit samples */
+ while (count--) {
+ *dst++ = *src++;
+ }
+ break;
+ }
+ case 2: {
+ uint16_t *dst = buffer;
+ assert_static(sizeof(*dst) <= sizeof(*src));
+
+ /* 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(G_GNUC_UNUSED int bytes_per_sample, void *buffer,
+ uint32_t count)
+{
+ int32_t *dst = buffer;
+ float *src = buffer;
+ assert_static(sizeof(*dst) <= sizeof(*src));
+
+ while (count--) {
+ *dst++ = (int32_t)(*src++ + 0.5f);
+ }
+}
+
+/**
+ * Choose a MPD sample format from libwavpacks' number of bits.
+ */
+static enum sample_format
+wavpack_bits_to_sample_format(bool is_float, int bytes_per_sample)
+{
+ if (is_float)
+ return SAMPLE_FORMAT_S24_P32;
+
+ switch (bytes_per_sample) {
+ case 1:
+ return SAMPLE_FORMAT_S8;
+
+ case 2:
+ return SAMPLE_FORMAT_S16;
+
+ case 3:
+ return SAMPLE_FORMAT_S24_P32;
+
+ case 4:
+ return SAMPLE_FORMAT_S32;
+
+ default:
+ return SAMPLE_FORMAT_UNDEFINED;
+ }
+}
+
+/*
+ * 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;
+ char chunk[CHUNK_SIZE];
+ int samples_requested, samples_got;
+ 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 ((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);
+
+ do {
+ if (decoder_get_command(decoder) == 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);
+ }
+ }
+
+ 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);
+
+ format_samples(
+ bytes_per_sample, chunk,
+ samples_got * audio_format.channels
+ );
+
+ decoder_data(
+ decoder, NULL, chunk,
+ samples_got * output_sample_size,
+ bitrate
+ );
+ }
+ } while (samples_got > 0);
+}
+
+/**
+ * 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];
+ int ret;
+
+ ret = WavpackGetTagItem(wpc, key, buffer, sizeof(buffer));
+ if (ret <= 0)
+ return false;
+
+ *value_r = atof(buffer);
+ return true;
+}
+
+static struct replay_gain_info *
+wavpack_replaygain(WavpackContext *wpc)
+{
+ struct replay_gain_info *replay_gain_info;
+ bool found = false;
+
+ replay_gain_info = replay_gain_info_new();
+
+ found |= wavpack_tag_float(
+ wpc, "replaygain_track_gain",
+ &replay_gain_info->tuples[REPLAY_GAIN_TRACK].gain
+ );
+ found |= wavpack_tag_float(
+ wpc, "replaygain_track_peak",
+ &replay_gain_info->tuples[REPLAY_GAIN_TRACK].peak
+ );
+ found |= wavpack_tag_float(
+ wpc, "replaygain_album_gain",
+ &replay_gain_info->tuples[REPLAY_GAIN_ALBUM].gain
+ );
+ found |= wavpack_tag_float(
+ wpc, "replaygain_album_peak",
+ &replay_gain_info->tuples[REPLAY_GAIN_ALBUM].peak
+ );
+
+ if (found) {
+ return replay_gain_info;
+ }
+
+ replay_gain_info_free(replay_gain_info);
+
+ return NULL;
+}
+
+/*
+ * Reads metainfo from the specified file.
+ */
+static struct tag *
+wavpack_tagdup(const char *fname)
+{
+ WavpackContext *wpc;
+ struct tag *tag;
+ char error[ERRORLEN];
+ char *s;
+ int size, allocated_size;
+
+ wpc = WavpackOpenFileInput(fname, error, OPEN_TAGS, 0);
+ if (wpc == NULL) {
+ g_warning(
+ "failed to open WavPack file \"%s\": %s\n",
+ fname, error
+ );
+ return NULL;
+ }
+
+ tag = tag_new();
+ tag->time = WavpackGetNumSamples(wpc);
+ tag->time /= WavpackGetSampleRate(wpc);
+
+ allocated_size = 0;
+ s = NULL;
+
+ for (unsigned i = 0; i < G_N_ELEMENTS(tagtypes); ++i) {
+ size = WavpackGetTagItem(wpc, tagtypes[i].name, NULL, 0);
+ if (size > 0) {
+ ++size; /* EOS */
+
+ if (s == NULL) {
+ s = g_malloc(size);
+ allocated_size = size;
+ } else if (size > allocated_size) {
+ char *t = (char *)g_realloc(s, size);
+ allocated_size = size;
+ s = t;
+ }
+
+ WavpackGetTagItem(wpc, tagtypes[i].name, s, size);
+ tag_add_item(tag, tagtypes[i].type, s);
+ }
+ }
+
+ g_free(s);
+
+ WavpackCloseFile(wpc);
+
+ return tag;
+}
+
+/*
+ * mpd input_stream <=> WavpackStreamReader wrapper callbacks
+ */
+
+/* This struct is needed for per-stream last_byte storage. */
+struct wavpack_input {
+ struct decoder *decoder;
+ struct input_stream *is;
+ /* Needed for push_back_byte() */
+ int last_byte;
+};
+
+/**
+ * Little wrapper for struct wavpack_input to cast from void *.
+ */
+static struct wavpack_input *
+wpin(void *id)
+{
+ assert(id);
+ return id;
+}
+
+static int32_t
+wavpack_input_read_bytes(void *id, void *data, int32_t bcount)
+{
+ uint8_t *buf = (uint8_t *)data;
+ int32_t i = 0;
+
+ if (wpin(id)->last_byte != EOF) {
+ *buf++ = wpin(id)->last_byte;
+ wpin(id)->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(
+ wpin(id)->decoder, wpin(id)->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->offset;
+}
+
+static int
+wavpack_input_set_pos_abs(void *id, uint32_t pos)
+{
+ return input_stream_seek(wpin(id)->is, pos, SEEK_SET, NULL) ? 0 : -1;
+}
+
+static int
+wavpack_input_set_pos_rel(void *id, int32_t delta, int mode)
+{
+ return input_stream_seek(wpin(id)->is, delta, mode, NULL) ? 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->size < 0)
+ return 0;
+
+ return wpin(id)->is->size;
+}
+
+static int
+wavpack_input_can_seek(void *id)
+{
+ return wpin(id)->is->seekable;
+}
+
+static WavpackStreamReader mpd_is_reader = {
+ .read_bytes = wavpack_input_read_bytes,
+ .get_pos = wavpack_input_get_pos,
+ .set_pos_abs = wavpack_input_set_pos_abs,
+ .set_pos_rel = wavpack_input_set_pos_rel,
+ .push_back_byte = wavpack_input_push_back_byte,
+ .get_length = wavpack_input_get_length,
+ .can_seek = wavpack_input_can_seek,
+ .write_bytes = NULL /* no need to write edited tags */
+};
+
+static void
+wavpack_input_init(struct wavpack_input *isp, struct decoder *decoder,
+ struct input_stream *is)
+{
+ isp->decoder = decoder;
+ isp->is = is;
+ isp->last_byte = EOF;
+}
+
+static struct input_stream *
+wavpack_open_wvc(struct decoder *decoder, struct wavpack_input *wpi)
+{
+ struct input_stream *is_wvc;
+ char *utf8url;
+ char *wvc_url = NULL;
+ char first_byte;
+ size_t nbytes;
+
+ /*
+ * As we use dc->utf8url, this function will be bad for
+ * single files. utf8url is not absolute file path :/
+ */
+ utf8url = decoder_get_uri(decoder);
+ if (utf8url == NULL) {
+ return false;
+ }
+
+ wvc_url = g_strconcat(utf8url, "c", NULL);
+ g_free(utf8url);
+
+ is_wvc = input_stream_open(wvc_url, NULL);
+ g_free(wvc_url);
+
+ if (is_wvc == NULL)
+ return NULL;
+
+ /*
+ * And we try to buffer in order to get know
+ * about a possible 404 error.
+ */
+ nbytes = decoder_read(
+ decoder, is_wvc, &first_byte, sizeof(first_byte)
+ );
+ if (nbytes == 0) {
+ input_stream_close(is_wvc);
+ return NULL;
+ }
+
+ /* push it back */
+ wavpack_input_init(wpi, decoder, is_wvc);
+ wpi->last_byte = first_byte;
+ return is_wvc;
+}
+
+/*
+ * Decodes a stream.
+ */
+static void
+wavpack_streamdecode(struct decoder * decoder, struct input_stream *is)
+{
+ char error[ERRORLEN];
+ WavpackContext *wpc;
+ struct input_stream *is_wvc;
+ int open_flags = OPEN_NORMALIZE;
+ struct wavpack_input isp, isp_wvc;
+ bool can_seek = is->seekable;
+
+ is_wvc = wavpack_open_wvc(decoder, &isp_wvc);
+ if (is_wvc != NULL) {
+ open_flags |= OPEN_WVC;
+ can_seek &= is_wvc->seekable;
+ }
+
+ if (!can_seek) {
+ open_flags |= OPEN_STREAMING;
+ }
+
+ wavpack_input_init(&isp, decoder, is);
+ wpc = WavpackOpenFileInputEx(
+ &mpd_is_reader, &isp,
+ open_flags & OPEN_WVC ? &isp_wvc : NULL,
+ error, open_flags, 23
+ );
+
+ if (wpc == NULL) {
+ g_warning("failed to open WavPack stream: %s\n", error);
+ return;
+ }
+
+ wavpack_decode(decoder, wpc, can_seek);
+
+ WavpackCloseFile(wpc);
+ if (open_flags & OPEN_WVC) {
+ input_stream_close(is_wvc);
+ }
+}
+
+/*
+ * Decodes a file.
+ */
+static void
+wavpack_filedecode(struct decoder *decoder, const char *fname)
+{
+ char error[ERRORLEN];
+ WavpackContext *wpc;
+ struct replay_gain_info *replay_gain_info;
+
+ wpc = WavpackOpenFileInput(
+ fname, error,
+ OPEN_TAGS | OPEN_WVC | OPEN_NORMALIZE, 23
+ );
+ if (wpc == NULL) {
+ g_warning(
+ "failed to open WavPack file \"%s\": %s\n",
+ fname, error
+ );
+ return;
+ }
+
+ replay_gain_info = wavpack_replaygain(wpc);
+ if (replay_gain_info != NULL) {
+ decoder_replay_gain(decoder, replay_gain_info);
+ replay_gain_info_free(replay_gain_info);
+ }
+
+ wavpack_decode(decoder, wpc, true);
+
+ WavpackCloseFile(wpc);
+}
+
+static char const *const wavpack_suffixes[] = {
+ "wv",
+ NULL
+};
+
+static char const *const wavpack_mime_types[] = {
+ "audio/x-wavpack",
+ NULL
+};
+
+const struct decoder_plugin wavpack_decoder_plugin = {
+ .name = "wavpack",
+ .stream_decode = wavpack_streamdecode,
+ .file_decode = wavpack_filedecode,
+ .tag_dup = wavpack_tagdup,
+ .suffixes = wavpack_suffixes,
+ .mime_types = wavpack_mime_types
+};