Adding upstream version 1.4.3+ds.upstream/1.4.3+dsupstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 220 insertions, 0 deletions

diff --git a/src/metaflac/operations_shorthand_seektable.c b/src/metaflac/operations_shorthand_seektable.c
new file mode 100644
index 0000000..c9175b3
--- /dev/null
+++ b/src/metaflac/operations_shorthand_seektable.c
@@ -0,0 +1,220 @@
+/* metaflac - Command-line FLAC metadata editor
+ * Copyright (C) 2001-2009  Josh Coalson
+ * Copyright (C) 2011-2023  Xiph.Org Foundation
+ *
+ * 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.
+ */
+
+#ifdef HAVE_CONFIG_H
+#  include <config.h>
+#endif
+
+#include "utils.h"
+#include "FLAC/assert.h"
+#include "FLAC/stream_decoder.h"
+#include "FLAC/metadata.h"
+#include "share/grabbag.h"
+#include "operations_shorthand.h"
+
+static FLAC__bool populate_seekpoint_values(const char *filename, FLAC__StreamMetadata *block, FLAC__bool *needs_write);
+
+FLAC__bool do_shorthand_operation__add_seekpoints(const char *filename, FLAC__Metadata_Chain *chain, const char *specification, FLAC__bool *needs_write)
+{
+	FLAC__bool ok = true, found_seektable_block = false;
+	FLAC__StreamMetadata *block = 0;
+	FLAC__Metadata_Iterator *iterator = FLAC__metadata_iterator_new();
+	FLAC__uint64 total_samples = 0;
+	unsigned sample_rate = 0;
+
+	if(0 == iterator)
+		die("out of memory allocating iterator");
+
+	FLAC__metadata_iterator_init(iterator, chain);
+
+	do {
+		block = FLAC__metadata_iterator_get_block(iterator);
+		if(block->type == FLAC__METADATA_TYPE_STREAMINFO) {
+			sample_rate = block->data.stream_info.sample_rate;
+			total_samples = block->data.stream_info.total_samples;
+		}
+		else if(block->type == FLAC__METADATA_TYPE_SEEKTABLE)
+			found_seektable_block = true;
+	} while(!found_seektable_block && FLAC__metadata_iterator_next(iterator));
+
+	if(total_samples == 0) {
+		flac_fprintf(stderr, "%s: ERROR: cannot add seekpoints because STREAMINFO block does not specify total_samples\n", filename);
+		FLAC__metadata_iterator_delete(iterator);
+		return false;
+	}
+
+	if(!found_seektable_block) {
+		/* create a new block */
+		block = FLAC__metadata_object_new(FLAC__METADATA_TYPE_SEEKTABLE);
+		if(0 == block)
+			die("out of memory allocating SEEKTABLE block");
+		while(FLAC__metadata_iterator_prev(iterator))
+			;
+		if(!FLAC__metadata_iterator_insert_block_after(iterator, block)) {
+			print_error_with_chain_status(chain, "%s: ERROR: adding new SEEKTABLE block to metadata", filename);
+			FLAC__metadata_object_delete(block);
+			FLAC__metadata_iterator_delete(iterator);
+			return false;
+		}
+		/* iterator is left pointing to new block */
+		FLAC__ASSERT(FLAC__metadata_iterator_get_block(iterator) == block);
+	}
+
+	FLAC__metadata_iterator_delete(iterator);
+
+	FLAC__ASSERT(0 != block);
+	FLAC__ASSERT(block->type == FLAC__METADATA_TYPE_SEEKTABLE);
+
+	if(!grabbag__seektable_convert_specification_to_template(specification, /*only_explicit_placeholders=*/false, total_samples, sample_rate, block, /*spec_has_real_points=*/0)) {
+		flac_fprintf(stderr, "%s: ERROR (internal) preparing seektable with seekpoints\n", filename);
+		return false;
+	}
+
+	ok = populate_seekpoint_values(filename, block, needs_write);
+
+	if(ok)
+		(void) FLAC__format_seektable_sort(&block->data.seek_table);
+
+	return ok;
+}
+
+/*
+ * local routines
+ */
+
+typedef struct {
+	FLAC__StreamMetadata_SeekTable *seektable_template;
+	FLAC__uint64 samples_written;
+	FLAC__uint64 audio_offset, last_offset;
+	unsigned first_seekpoint_to_check;
+	FLAC__bool error_occurred;
+	FLAC__StreamDecoderErrorStatus error_status;
+} ClientData;
+
+static FLAC__StreamDecoderWriteStatus write_callback_(const FLAC__StreamDecoder *decoder, const FLAC__Frame *frame, const FLAC__int32 * const buffer[], void *client_data)
+{
+	ClientData *cd = (ClientData*)client_data;
+
+	(void)buffer;
+	FLAC__ASSERT(0 != cd);
+
+	if(!cd->error_occurred) {
+		const unsigned blocksize = frame->header.blocksize;
+		const FLAC__uint64 frame_first_sample = cd->samples_written;
+		const FLAC__uint64 frame_last_sample = frame_first_sample + (FLAC__uint64)blocksize - 1;
+		FLAC__uint64 test_sample;
+		unsigned i;
+		for(i = cd->first_seekpoint_to_check; i < cd->seektable_template->num_points; i++) {
+			test_sample = cd->seektable_template->points[i].sample_number;
+			if(test_sample > frame_last_sample) {
+				break;
+			}
+			else if(test_sample >= frame_first_sample) {
+				cd->seektable_template->points[i].sample_number = frame_first_sample;
+				cd->seektable_template->points[i].stream_offset = cd->last_offset - cd->audio_offset;
+				cd->seektable_template->points[i].frame_samples = blocksize;
+				cd->first_seekpoint_to_check++;
+				/* DO NOT: "break;" and here's why:
+				 * The seektable template may contain more than one target
+				 * sample for any given frame; we will keep looping, generating
+				 * duplicate seekpoints for them, and we'll clean it up later,
+				 * just before writing the seektable back to the metadata.
+				 */
+			}
+			else {
+				cd->first_seekpoint_to_check++;
+			}
+		}
+		cd->samples_written += blocksize;
+		if(!FLAC__stream_decoder_get_decode_position(decoder, &cd->last_offset))
+			return FLAC__STREAM_DECODER_WRITE_STATUS_ABORT;
+		return FLAC__STREAM_DECODER_WRITE_STATUS_CONTINUE;
+	}
+	else
+		return FLAC__STREAM_DECODER_WRITE_STATUS_ABORT;
+}
+
+static void error_callback_(const FLAC__StreamDecoder *decoder, FLAC__StreamDecoderErrorStatus status, void *client_data)
+{
+	ClientData *cd = (ClientData*)client_data;
+
+	(void)decoder;
+	FLAC__ASSERT(0 != cd);
+
+	if(!cd->error_occurred) { /* don't let multiple errors overwrite the first one */
+		cd->error_occurred = true;
+		cd->error_status = status;
+	}
+}
+
+FLAC__bool populate_seekpoint_values(const char *filename, FLAC__StreamMetadata *block, FLAC__bool *needs_write)
+{
+	FLAC__StreamDecoder *decoder;
+	ClientData client_data;
+	FLAC__bool ok = true;
+
+	FLAC__ASSERT(0 != block);
+	FLAC__ASSERT(block->type == FLAC__METADATA_TYPE_SEEKTABLE);
+
+	client_data.seektable_template = &block->data.seek_table;
+	client_data.samples_written = 0;
+	/* client_data.audio_offset must be determined later */
+	client_data.first_seekpoint_to_check = 0;
+	client_data.error_occurred = false;
+
+	decoder = FLAC__stream_decoder_new();
+
+	if(0 == decoder) {
+		flac_fprintf(stderr, "%s: ERROR (--add-seekpoint) creating the decoder instance\n", filename);
+		return false;
+	}
+
+	FLAC__stream_decoder_set_md5_checking(decoder, false);
+	FLAC__stream_decoder_set_metadata_ignore_all(decoder);
+
+	if(FLAC__stream_decoder_init_file(decoder, filename, write_callback_, /*metadata_callback=*/0, error_callback_, &client_data) != FLAC__STREAM_DECODER_INIT_STATUS_OK) {
+		flac_fprintf(stderr, "%s: ERROR (--add-seekpoint) initializing the decoder instance (%s)\n", filename, FLAC__stream_decoder_get_resolved_state_string(decoder));
+		ok = false;
+	}
+
+	if(ok && !FLAC__stream_decoder_process_until_end_of_metadata(decoder)) {
+		flac_fprintf(stderr, "%s: ERROR (--add-seekpoint) decoding file (%s)\n", filename, FLAC__stream_decoder_get_resolved_state_string(decoder));
+		ok = false;
+	}
+
+	if(ok && !FLAC__stream_decoder_get_decode_position(decoder, &client_data.audio_offset)) {
+		flac_fprintf(stderr, "%s: ERROR (--add-seekpoint) decoding file\n", filename);
+		ok = false;
+	}
+	client_data.last_offset = client_data.audio_offset;
+
+	if(ok && !FLAC__stream_decoder_process_until_end_of_stream(decoder)) {
+		flac_fprintf(stderr, "%s: ERROR (--add-seekpoint) decoding file (%s)\n", filename, FLAC__stream_decoder_get_resolved_state_string(decoder));
+		ok = false;
+	}
+
+	if(ok && client_data.error_occurred) {
+		flac_fprintf(stderr, "%s: ERROR (--add-seekpoint) decoding file (%u:%s)\n", filename, (unsigned)client_data.error_status, FLAC__StreamDecoderErrorStatusString[client_data.error_status]);
+		ok = false;
+	}
+
+	*needs_write = true;
+	FLAC__stream_decoder_delete(decoder);
+	return ok;
+}