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finish implementation of --add-seekpoint

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This commit is contained in:
Josh Coalson 2002-11-08 22:24:41 +00:00
parent 3c18ade71f
commit 4be849ff09
2 changed files with 58 additions and 35 deletions
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80
src/metaflac/operations_shorthand_seektable.c
View File

@ -79,9 +79,8 @@ FLAC__bool do_shorthand_operation__add_seekpoints(const char *filename, FLAC__Me
ok = populate_seekpoint_values(filename, block, needs_write);
if(ok) {
//@@@@ compact it
}
if(ok)
(void) FLAC__format_seektable_sort(&block->data.seek_table);
return ok;
}
@ -93,6 +92,7 @@ FLAC__bool do_shorthand_operation__add_seekpoints(const char *filename, FLAC__Me
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;
@ -102,48 +102,44 @@ static FLAC__StreamDecoderWriteStatus write_callback_(const FLAC__FileDecoder *d
{
ClientData *cd = (ClientData*)client_data;
(void)buffer;
FLAC__ASSERT(0 != cd);
if(!cd->error_occurred && cd->seektable_template->num_points > 0) {
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__file_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;
}
#if 0
@@@@
{
const unsigned blocksize = FLAC__stream_encoder_get_blocksize(encoder);
const FLAC__uint64 frame_first_sample = seekable_stream_encoder->private_->samples_written;
const FLAC__uint64 frame_last_sample = frame_first_sample + (FLAC__uint64)blocksize - 1;
FLAC__uint64 test_sample;
unsigned i;
for(i = seekable_stream_encoder->private_->first_seekpoint_to_check; i < seekable_stream_encoder->private_->seek_table->num_points; i++) {
test_sample = seekable_stream_encoder->private_->seek_table->points[i].sample_number;
if(test_sample > frame_last_sample) {
break;
}
else if(test_sample >= frame_first_sample) {
seekable_stream_encoder->private_->seek_table->points[i].sample_number = frame_first_sample;
seekable_stream_encoder->private_->seek_table->points[i].stream_offset = seekable_stream_encoder->private_->bytes_written - seekable_stream_encoder->private_->stream_offset;
seekable_stream_encoder->private_->seek_table->points[i].frame_samples = blocksize;
seekable_stream_encoder->private_->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 {
seekable_stream_encoder->private_->first_seekpoint_to_check++;
}
}
}
#endif
static void metadata_callback_(const FLAC__FileDecoder *decoder, const FLAC__StreamMetadata *metadata, void *client_data)
{
@ -155,6 +151,7 @@ static void error_callback_(const FLAC__FileDecoder *decoder, FLAC__StreamDecode
{
ClientData *cd = (ClientData*)client_data;
(void)decoder;
FLAC__ASSERT(0 != cd);
if(!cd->error_occurred) { /* don't let multiple errors overwrite the first one */
@ -174,6 +171,7 @@ FLAC__bool populate_seekpoint_values(const char *filename, FLAC__StreamMetadata
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;
@ -197,6 +195,17 @@ FLAC__bool populate_seekpoint_values(const char *filename, FLAC__StreamMetadata
ok = false;
}
if(ok && !FLAC__file_decoder_process_until_end_of_metadata(decoder)) {
fprintf(stderr, "%s: ERROR (--add-seekpoint) decoding file (%s)\n", filename, FLAC__file_decoder_get_resolved_state_string(decoder));
ok = false;
}
if(ok && !FLAC__file_decoder_get_decode_position(decoder, &client_data.audio_offset)) {
fprintf(stderr, "%s: ERROR (--add-seekpoint) decoding file\n", filename);
ok = false;
}
client_data.last_offset = client_data.audio_offset;
if(ok && !FLAC__file_decoder_process_until_end_of_file(decoder)) {
fprintf(stderr, "%s: ERROR (--add-seekpoint) decoding file (%s)\n", filename, FLAC__file_decoder_get_resolved_state_string(decoder));
ok = false;
@ -207,6 +216,7 @@ FLAC__bool populate_seekpoint_values(const char *filename, FLAC__StreamMetadata
ok = false;
}
*needs_write = true;
FLAC__file_decoder_delete(decoder);
return ok;
}

13
src/metaflac/usage.c
View File

@ -149,6 +149,19 @@ int long_usage(const char *message, ...)
fprintf(out, " must have the same resolution, sample rate, and number\n");
fprintf(out, " of channels. The sample rate must be one of 8, 11.025,\n");
fprintf(out, " 12, 16, 22.05, 24, 32, 44.1, or 48 kHz.\n");
fprintf(out, "--add-seekpoint={#|X|#x|#s} Add seek points to a SEEKTABLE block\n");
fprintf(out, " # : a specific sample number for a seek point\n");
fprintf(out, " X : a placeholder point (always goes at the end of the SEEKTABLE)\n");
fprintf(out, " #x : # evenly spaced seekpoints, the first being at sample 0\n");
fprintf(out, " #s : a seekpoint every # seconds; # does not have to be a whole number\n");
fprintf(out, " If no SEEKTABLE block exists, one will be created. If\n");
fprintf(out, " one already exists, points will be added to the existing\n");
fprintf(out, " table, and duplicates will be turned into placeholder\n");
fprintf(out, " points. You may use many --add-seekpoint options; the\n");
fprintf(out, " resulting SEEKTABLE will be the unique-ified union of\n");
fprintf(out, " all such values. Example: --add-seekpoint=100x\n");
fprintf(out, " --add-seekpoint=3.5s will add 100 evenly spaced\n");
fprintf(out, " seekpoints and a seekpoint every 3.5 seconds.\n");
fprintf(out, "--add-padding=length Add a padding block of the given length (in bytes).\n");
fprintf(out, " The overall length of the new block will be 4 + length;\n");
fprintf(out, " the extra 4 bytes is for the metadata block header.\n");