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add new requirements to ogg mapping: vorbis comment block must come second after streaminfo; first packet must have a packet type byte of 0x7f; packet 0 version must be followed by a 2-byte count of the # of header packets

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This commit is contained in:
Josh Coalson
2004-09-10 00:38:21 +00:00
parent 10c6f0fef4
commit 69cfda7a20
16 changed files with 196 additions and 59 deletions
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30
src/libOggFLAC/ogg_encoder_aspect.c
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@@ -67,17 +67,31 @@ void OggFLAC__ogg_encoder_aspect_set_serial_number(OggFLAC__OggEncoderAspect *as
aspect->serial_number = value;
}
FLAC__bool OggFLAC__ogg_encoder_aspect_set_num_metadata(OggFLAC__OggEncoderAspect *aspect, unsigned value)
{
if(value < (1u << OggFLAC__MAPPING_NUM_HEADERS_LEN)) {
aspect->num_metadata = value;
return true;
}
else
return false;
}
void OggFLAC__ogg_encoder_aspect_set_defaults(OggFLAC__OggEncoderAspect *aspect)
{
aspect->serial_number = 0;
aspect->num_metadata = 0;
}
/*
* The basic FLAC -> Ogg mapping goes like this:
*
* - 'fLaC' magic and STREAMINFO block get combined into the first
* packet. The packet is prefixed with 'FLAC' magic and the 2
* byte Ogg FLAC mapping version number.
* packet. The packet is prefixed with
* + the one-byte packet type 0x7F
* + 'FLAC' magic
* + the 2 byte Ogg FLAC mapping version number
* + tne 2 byte big-endian # of header packets
* - The first packet is flushed to the first page.
* - Each subsequent metadata block goes into its own packet.
* - Each metadata packet is flushed to page (this is not required,
@@ -110,9 +124,11 @@ FLAC__StreamEncoderWriteStatus OggFLAC__ogg_encoder_aspect_write_callback_wrappe
if(aspect->is_first_packet) {
FLAC__byte newbuffer[
OggFLAC__MAPPING_PACKET_TYPE_LENGTH +
OggFLAC__MAPPING_MAGIC_LENGTH +
OggFLAC__MAPPING_VERSION_MAJOR_LENGTH +
OggFLAC__MAPPING_VERSION_MINOR_LENGTH +
OggFLAC__MAPPING_NUM_HEADERS_LENGTH +
FLAC__STREAM_SYNC_LENGTH +
FLAC__STREAM_METADATA_HEADER_LENGTH +
FLAC__STREAM_METADATA_STREAMINFO_LENGTH
@@ -126,6 +142,9 @@ FLAC__StreamEncoderWriteStatus OggFLAC__ogg_encoder_aspect_write_callback_wrappe
FLAC__ASSERT(0);
return FLAC__STREAM_ENCODER_WRITE_STATUS_FATAL_ERROR;
}
/* add first header packet type */
*b = OggFLAC__MAPPING_FIRST_HEADER_PACKET_TYPE;
b += OggFLAC__MAPPING_PACKET_TYPE_LENGTH;
/* add 'FLAC' mapping magic */
memcpy(b, OggFLAC__MAPPING_MAGIC, OggFLAC__MAPPING_MAGIC_LENGTH);
b += OggFLAC__MAPPING_MAGIC_LENGTH;
@@ -135,6 +154,11 @@ FLAC__StreamEncoderWriteStatus OggFLAC__ogg_encoder_aspect_write_callback_wrappe
/* add Ogg FLAC mapping minor version number */
memcpy(b, &OggFLAC__MAPPING_VERSION_MINOR, OggFLAC__MAPPING_VERSION_MINOR_LENGTH);
b += OggFLAC__MAPPING_VERSION_MINOR_LENGTH;
/* add number of header packets */
*b = (FLAC__byte)(aspect->num_metadata >> 8);
b++;
*b = (FLAC__byte)(aspect->num_metadata);
b++;
/* add native FLAC 'fLaC' magic */
memcpy(b, FLAC__STREAM_SYNC_STRING, FLAC__STREAM_SYNC_LENGTH);
b += FLAC__STREAM_SYNC_LENGTH;
@@ -158,7 +182,7 @@ FLAC__StreamEncoderWriteStatus OggFLAC__ogg_encoder_aspect_write_callback_wrappe
if(ogg_stream_packetin(&aspect->stream_state, &packet) != 0)
return FLAC__STREAM_ENCODER_WRITE_STATUS_FATAL_ERROR;
/*@@@@@@ can't figure out a way to pass a useful number for 'samples' to the write_callback, so we'll just pass 0 */
/*@@@ can't figure out a way to pass a useful number for 'samples' to the write_callback, so we'll just pass 0 */
if(is_metadata) {
while(ogg_stream_flush(&aspect->stream_state, &aspect->page) != 0) {
if(write_callback(encoder, aspect->page.header, aspect->page.header_len, 0, current_frame, client_data) != FLAC__STREAM_ENCODER_WRITE_STATUS_OK)