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-rw-r--r--src/decoder/FLACDecoderPlugin.cxx383
1 files changed, 383 insertions, 0 deletions
diff --git a/src/decoder/FLACDecoderPlugin.cxx b/src/decoder/FLACDecoderPlugin.cxx
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+++ b/src/decoder/FLACDecoderPlugin.cxx
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+/*
+ * Copyright (C) 2003-2012 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" /* must be first for large file support */
+#include "FLACDecoderPlugin.h"
+#include "FLACCommon.hxx"
+#include "FLACMetaData.hxx"
+#include "OggCodec.hxx"
+
+#include <glib.h>
+
+#include <assert.h>
+#include <unistd.h>
+
+#include <sys/stat.h>
+#include <sys/types.h>
+
+#if !defined(FLAC_API_VERSION_CURRENT) || FLAC_API_VERSION_CURRENT <= 7
+#error libFLAC is too old
+#endif
+
+static void flacPrintErroredState(FLAC__StreamDecoderState state)
+{
+ switch (state) {
+ case FLAC__STREAM_DECODER_SEARCH_FOR_METADATA:
+ case FLAC__STREAM_DECODER_READ_METADATA:
+ case FLAC__STREAM_DECODER_SEARCH_FOR_FRAME_SYNC:
+ case FLAC__STREAM_DECODER_READ_FRAME:
+ case FLAC__STREAM_DECODER_END_OF_STREAM:
+ return;
+
+ case FLAC__STREAM_DECODER_OGG_ERROR:
+ case FLAC__STREAM_DECODER_SEEK_ERROR:
+ case FLAC__STREAM_DECODER_ABORTED:
+ case FLAC__STREAM_DECODER_MEMORY_ALLOCATION_ERROR:
+ case FLAC__STREAM_DECODER_UNINITIALIZED:
+ break;
+ }
+
+ g_warning("%s\n", FLAC__StreamDecoderStateString[state]);
+}
+
+static void flacMetadata(G_GNUC_UNUSED const FLAC__StreamDecoder * dec,
+ const FLAC__StreamMetadata * block, void *vdata)
+{
+ flac_metadata_common_cb(block, (struct flac_data *) vdata);
+}
+
+static FLAC__StreamDecoderWriteStatus
+flac_write_cb(const FLAC__StreamDecoder *dec, const FLAC__Frame *frame,
+ const FLAC__int32 *const buf[], void *vdata)
+{
+ struct flac_data *data = (struct flac_data *) vdata;
+ FLAC__uint64 nbytes = 0;
+
+ if (FLAC__stream_decoder_get_decode_position(dec, &nbytes)) {
+ if (data->position > 0 && nbytes > data->position) {
+ nbytes -= data->position;
+ data->position += nbytes;
+ } else {
+ data->position = nbytes;
+ nbytes = 0;
+ }
+ } else
+ nbytes = 0;
+
+ return flac_common_write(data, frame, buf, nbytes);
+}
+
+static bool
+flac_scan_file(const char *file,
+ const struct tag_handler *handler, void *handler_ctx)
+{
+ FLACMetadataChain chain;
+ if (!chain.Read(file)) {
+ g_debug("Failed to read FLAC tags: %s",
+ chain.GetStatusString());
+ return false;
+ }
+
+ chain.Scan(handler, handler_ctx);
+ return true;
+}
+
+static bool
+flac_scan_stream(struct input_stream *is,
+ const struct tag_handler *handler, void *handler_ctx)
+{
+ FLACMetadataChain chain;
+ if (!chain.Read(is)) {
+ g_debug("Failed to read FLAC tags: %s",
+ chain.GetStatusString());
+ return false;
+ }
+
+ chain.Scan(handler, handler_ctx);
+ return true;
+}
+
+/**
+ * Some glue code around FLAC__stream_decoder_new().
+ */
+static FLAC__StreamDecoder *
+flac_decoder_new(void)
+{
+ FLAC__StreamDecoder *sd = FLAC__stream_decoder_new();
+ if (sd == nullptr) {
+ g_warning("FLAC__stream_decoder_new() failed");
+ return nullptr;
+ }
+
+ if(!FLAC__stream_decoder_set_metadata_respond(sd, FLAC__METADATA_TYPE_VORBIS_COMMENT))
+ g_debug("FLAC__stream_decoder_set_metadata_respond() has failed");
+
+ return sd;
+}
+
+static bool
+flac_decoder_initialize(struct flac_data *data, FLAC__StreamDecoder *sd,
+ FLAC__uint64 duration)
+{
+ data->total_frames = duration;
+
+ if (!FLAC__stream_decoder_process_until_end_of_metadata(sd)) {
+ g_warning("problem reading metadata");
+ return false;
+ }
+
+ if (data->initialized) {
+ /* done */
+ decoder_initialized(data->decoder, &data->audio_format,
+ data->input_stream->seekable,
+ (float)data->total_frames /
+ (float)data->audio_format.sample_rate);
+ return true;
+ }
+
+ if (data->input_stream->seekable)
+ /* allow the workaround below only for nonseekable
+ streams*/
+ return false;
+
+ /* no stream_info packet found; try to initialize the decoder
+ from the first frame header */
+ FLAC__stream_decoder_process_single(sd);
+ return data->initialized;
+}
+
+static void
+flac_decoder_loop(struct flac_data *data, FLAC__StreamDecoder *flac_dec,
+ FLAC__uint64 t_start, FLAC__uint64 t_end)
+{
+ struct decoder *decoder = data->decoder;
+ enum decoder_command cmd;
+
+ data->first_frame = t_start;
+
+ while (true) {
+ if (data->tag != nullptr && !tag_is_empty(data->tag)) {
+ cmd = decoder_tag(data->decoder, data->input_stream,
+ data->tag);
+ tag_free(data->tag);
+ data->tag = tag_new();
+ } else
+ cmd = decoder_get_command(decoder);
+
+ if (cmd == DECODE_COMMAND_SEEK) {
+ FLAC__uint64 seek_sample = t_start +
+ decoder_seek_where(decoder) *
+ data->audio_format.sample_rate;
+ if (seek_sample >= t_start &&
+ (t_end == 0 || seek_sample <= t_end) &&
+ FLAC__stream_decoder_seek_absolute(flac_dec, seek_sample)) {
+ data->next_frame = seek_sample;
+ data->position = 0;
+ decoder_command_finished(decoder);
+ } else
+ decoder_seek_error(decoder);
+ } else if (cmd == DECODE_COMMAND_STOP ||
+ FLAC__stream_decoder_get_state(flac_dec) == FLAC__STREAM_DECODER_END_OF_STREAM)
+ break;
+
+ if (t_end != 0 && data->next_frame >= t_end)
+ /* end of this sub track */
+ break;
+
+ if (!FLAC__stream_decoder_process_single(flac_dec) &&
+ decoder_get_command(decoder) == DECODE_COMMAND_NONE) {
+ /* a failure that was not triggered by a
+ decoder command */
+ flacPrintErroredState(FLAC__stream_decoder_get_state(flac_dec));
+ break;
+ }
+ }
+}
+
+static FLAC__StreamDecoderInitStatus
+stream_init_oggflac(FLAC__StreamDecoder *flac_dec, struct flac_data *data)
+{
+ return FLAC__stream_decoder_init_ogg_stream(flac_dec,
+ FLACInput::Read,
+ FLACInput::Seek,
+ FLACInput::Tell,
+ FLACInput::Length,
+ FLACInput::Eof,
+ flac_write_cb,
+ flacMetadata,
+ FLACInput::Error,
+ data);
+}
+
+static FLAC__StreamDecoderInitStatus
+stream_init_flac(FLAC__StreamDecoder *flac_dec, struct flac_data *data)
+{
+ return FLAC__stream_decoder_init_stream(flac_dec,
+ FLACInput::Read,
+ FLACInput::Seek,
+ FLACInput::Tell,
+ FLACInput::Length,
+ FLACInput::Eof,
+ flac_write_cb,
+ flacMetadata,
+ FLACInput::Error,
+ data);
+}
+
+static FLAC__StreamDecoderInitStatus
+stream_init(FLAC__StreamDecoder *flac_dec, struct flac_data *data, bool is_ogg)
+{
+ return is_ogg
+ ? stream_init_oggflac(flac_dec, data)
+ : stream_init_flac(flac_dec, data);
+}
+
+static void
+flac_decode_internal(struct decoder * decoder,
+ struct input_stream *input_stream,
+ bool is_ogg)
+{
+ FLAC__StreamDecoder *flac_dec;
+
+ flac_dec = flac_decoder_new();
+ if (flac_dec == nullptr)
+ return;
+
+ struct flac_data data(decoder, input_stream);
+ data.tag = tag_new();
+
+ FLAC__StreamDecoderInitStatus status =
+ stream_init(flac_dec, &data, is_ogg);
+ if (status != FLAC__STREAM_DECODER_INIT_STATUS_OK) {
+ FLAC__stream_decoder_delete(flac_dec);
+ g_warning("%s", FLAC__StreamDecoderInitStatusString[status]);
+ return;
+ }
+
+ if (!flac_decoder_initialize(&data, flac_dec, 0)) {
+ FLAC__stream_decoder_finish(flac_dec);
+ FLAC__stream_decoder_delete(flac_dec);
+ return;
+ }
+
+ flac_decoder_loop(&data, flac_dec, 0, 0);
+
+ FLAC__stream_decoder_finish(flac_dec);
+ FLAC__stream_decoder_delete(flac_dec);
+}
+
+static void
+flac_decode(struct decoder * decoder, struct input_stream *input_stream)
+{
+ flac_decode_internal(decoder, input_stream, false);
+}
+
+static bool
+oggflac_init(G_GNUC_UNUSED const struct config_param *param)
+{
+ return !!FLAC_API_SUPPORTS_OGG_FLAC;
+}
+
+static bool
+oggflac_scan_file(const char *file,
+ const struct tag_handler *handler, void *handler_ctx)
+{
+ FLACMetadataChain chain;
+ if (!chain.ReadOgg(file)) {
+ g_debug("Failed to read OggFLAC tags: %s",
+ chain.GetStatusString());
+ return false;
+ }
+
+ chain.Scan(handler, handler_ctx);
+ return true;
+}
+
+static bool
+oggflac_scan_stream(struct input_stream *is,
+ const struct tag_handler *handler, void *handler_ctx)
+{
+ FLACMetadataChain chain;
+ if (!chain.ReadOgg(is)) {
+ g_debug("Failed to read OggFLAC tags: %s",
+ chain.GetStatusString());
+ return false;
+ }
+
+ chain.Scan(handler, handler_ctx);
+ return true;
+}
+
+static void
+oggflac_decode(struct decoder *decoder, struct input_stream *input_stream)
+{
+ if (ogg_codec_detect(decoder, input_stream) != OGG_CODEC_FLAC)
+ return;
+
+ /* rewind the stream, because ogg_codec_detect() has
+ moved it */
+ input_stream_lock_seek(input_stream, 0, SEEK_SET, nullptr);
+
+ flac_decode_internal(decoder, input_stream, true);
+}
+
+static const char *const oggflac_suffixes[] = { "ogg", "oga", nullptr };
+static const char *const oggflac_mime_types[] = {
+ "application/ogg",
+ "application/x-ogg",
+ "audio/ogg",
+ "audio/x-flac+ogg",
+ "audio/x-ogg",
+ nullptr
+};
+
+const struct decoder_plugin oggflac_decoder_plugin = {
+ "oggflac",
+ oggflac_init,
+ nullptr,
+ oggflac_decode,
+ nullptr,
+ oggflac_scan_file,
+ oggflac_scan_stream,
+ nullptr,
+ oggflac_suffixes,
+ oggflac_mime_types,
+};
+
+static const char *const flac_suffixes[] = { "flac", nullptr };
+static const char *const flac_mime_types[] = {
+ "application/flac",
+ "application/x-flac",
+ "audio/flac",
+ "audio/x-flac",
+ nullptr
+};
+
+const struct decoder_plugin flac_decoder_plugin = {
+ "flac",
+ nullptr,
+ nullptr,
+ flac_decode,
+ nullptr,
+ flac_scan_file,
+ flac_scan_stream,
+ nullptr,
+ flac_suffixes,
+ flac_mime_types,
+};