mirror of
https://github.com/WinampDesktop/winamp.git
synced 2024-12-28 23:06:07 +00:00
314 lines
7.2 KiB
C++
314 lines
7.2 KiB
C++
#include "Metadata.h"
|
|
|
|
nsavi::Metadata::Metadata(nsavi::avi_reader *_reader) : ParserBase(_reader)
|
|
{
|
|
info_found = NOT_READ;
|
|
info = 0;
|
|
}
|
|
|
|
|
|
// skips a chunk and updates a parser state variable on error
|
|
static int SkipChunk(nsavi::avi_reader *reader, const nsavi::riff_chunk *chunk, nsavi::ParseState &state, uint32_t *bytes_read)
|
|
{
|
|
int ret = nsavi::skip_chunk(reader, chunk, bytes_read);
|
|
if (ret == nsavi::READ_EOF)
|
|
{
|
|
state = nsavi::NOT_FOUND;
|
|
return nsavi::READ_NOT_FOUND;
|
|
}
|
|
else if (ret > nsavi::READ_OK)
|
|
{
|
|
state = nsavi::PARSE_ERROR;
|
|
return ret;
|
|
}
|
|
else if (ret < nsavi::READ_OK)
|
|
{ // pass-thru return value from avi_reader
|
|
state = nsavi::PARSE_RESYNC;
|
|
return ret;
|
|
}
|
|
|
|
return nsavi::READ_OK;
|
|
}
|
|
// reads a chunk and updates parse state variable on error
|
|
static int ReadChunk(nsavi::avi_reader *reader, nsavi::riff_chunk *chunk, nsavi::ParseState &state, uint32_t *bytes_read)
|
|
{
|
|
int ret = nsavi::read_riff_chunk(reader, chunk, bytes_read);
|
|
if (ret == nsavi::READ_EOF)
|
|
{
|
|
state = nsavi::NOT_FOUND;
|
|
return nsavi::READ_NOT_FOUND;
|
|
}
|
|
else if (ret > nsavi::READ_OK)
|
|
{
|
|
state = nsavi::PARSE_ERROR;
|
|
return ret;
|
|
}
|
|
else if (ret < nsavi::READ_OK)
|
|
{ // pass-thru return value from avi_reader
|
|
state = nsavi::PARSE_RESYNC;
|
|
return ret;
|
|
}
|
|
|
|
return nsavi::READ_OK;
|
|
}
|
|
|
|
int nsavi::Metadata::GetDuration(int *time_ms)
|
|
{
|
|
uint32_t riff_type;
|
|
int ret = GetRIFFType(&riff_type);
|
|
if (ret)
|
|
return ret;
|
|
|
|
if (riff_type != ' IVA')
|
|
return READ_INVALID_DATA;
|
|
|
|
nsavi::HeaderList header_list;
|
|
ret = GetHeaderList(&header_list);
|
|
if (ret)
|
|
return ret;
|
|
|
|
int duration=-1;
|
|
for (uint32_t i=0;i!=header_list.stream_list_size;i++)
|
|
{
|
|
const nsavi::STRL &stream = header_list.stream_list[i];
|
|
if (stream.stream_header)
|
|
{
|
|
if (stream.stream_header->stream_type == nsavi::stream_type_audio)
|
|
{
|
|
if (stream.stream_header->length && !stream.stream_header->sample_size && stream.stream_header->rate)
|
|
duration = (uint64_t)stream.stream_header->length * (uint64_t)stream.stream_header->scale * 1000ULL / (uint64_t)stream.stream_header->rate;
|
|
}
|
|
else if (stream.stream_header->stream_type == nsavi::stream_type_video && stream.stream_header->rate)
|
|
{
|
|
if (duration == -1)
|
|
duration = (uint64_t)stream.stream_header->length * (uint64_t)stream.stream_header->scale * 1000ULL / (uint64_t)stream.stream_header->rate;
|
|
}
|
|
}
|
|
}
|
|
|
|
*time_ms = duration;
|
|
|
|
return nsavi::READ_OK;
|
|
}
|
|
|
|
int nsavi::Metadata::GetHeaderList(HeaderList *header_list)
|
|
{
|
|
if (riff_parsed != PARSED)
|
|
return READ_INVALID_CALL;
|
|
|
|
if (riff_parsed == PARSE_RESYNC)
|
|
reader->Seek(riff_start);
|
|
|
|
if (header_list_parsed == NOT_READ)
|
|
{
|
|
// first, see how far we are into the file to properly bound our reads
|
|
uint64_t start = reader->Tell();
|
|
uint32_t bytes_available = riff_header.size;
|
|
bytes_available -= (uint32_t)(start - riff_start);
|
|
|
|
while (bytes_available)
|
|
{
|
|
if (bytes_available < 8)
|
|
{
|
|
header_list_parsed = NOT_FOUND;
|
|
return READ_NOT_FOUND;
|
|
}
|
|
uint32_t bytes_read;
|
|
riff_chunk chunk;
|
|
int ret = ReadChunk(reader, &chunk, header_list_parsed, &bytes_read);
|
|
if (ret)
|
|
return ret;
|
|
|
|
bytes_available -= bytes_read;
|
|
if (bytes_available < chunk.size)
|
|
{
|
|
header_list_parsed = PARSE_ERROR;
|
|
return READ_INVALID_DATA;
|
|
}
|
|
switch(chunk.id)
|
|
{
|
|
case 'TSIL': // list chunk
|
|
switch(chunk.type)
|
|
{
|
|
case 'lrdh': // this is what we're looking for
|
|
ret = ParseHeaderList(chunk.size, &bytes_read);
|
|
if (ret == READ_OK)
|
|
{
|
|
header_list->avi_header = avi_header;
|
|
header_list->stream_list = stream_list;
|
|
header_list->stream_list_size = stream_list_size;
|
|
header_list->odml_header = odml_header;
|
|
}
|
|
return ret;
|
|
case 'OFNI': // INFO
|
|
if (!info)
|
|
{
|
|
info = new nsavi::Info();
|
|
if (!info)
|
|
{
|
|
header_list_parsed = PARSE_ERROR;
|
|
return READ_OUT_OF_MEMORY;
|
|
}
|
|
|
|
ret = info->Read(reader, chunk.size);
|
|
if (ret)
|
|
{
|
|
header_list_parsed = PARSE_ERROR;
|
|
return ret;
|
|
}
|
|
|
|
info_found = PARSED;
|
|
}
|
|
else
|
|
{
|
|
ret = SkipChunk(reader, &chunk, header_list_parsed, &bytes_read);
|
|
if (ret)
|
|
return ret;
|
|
bytes_available -= bytes_read;
|
|
}
|
|
break;
|
|
default: // skip anything we don't understand
|
|
ret = SkipChunk(reader, &chunk, header_list_parsed, &bytes_read);
|
|
if (ret)
|
|
return ret;
|
|
bytes_available -= bytes_read;
|
|
break;
|
|
}
|
|
|
|
break;
|
|
default: // skip anything we don't understand
|
|
case 'KNUJ': // skip junk chunks
|
|
ret = SkipChunk(reader, &chunk, header_list_parsed, &bytes_read);
|
|
if (ret)
|
|
return ret;
|
|
bytes_available -= bytes_read;
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
if (header_list_parsed == PARSED)
|
|
{
|
|
header_list->avi_header = avi_header;
|
|
header_list->stream_list = stream_list;
|
|
header_list->stream_list_size = stream_list_size;
|
|
header_list->odml_header = odml_header;
|
|
return READ_OK;
|
|
}
|
|
|
|
return READ_INVALID_CALL;
|
|
}
|
|
|
|
int nsavi::Metadata::GetInfo(nsavi::Info **out_info)
|
|
{
|
|
if (riff_parsed != PARSED)
|
|
return READ_INVALID_CALL;
|
|
|
|
if (riff_parsed == PARSE_RESYNC)
|
|
reader->Seek(riff_start);
|
|
|
|
if (info_found == NOT_READ)
|
|
{
|
|
// first, see how far we are into the file to properly bound our reads
|
|
uint64_t start = reader->Tell();
|
|
uint32_t bytes_available = riff_header.size;
|
|
bytes_available -= (uint32_t)(start - riff_start);
|
|
|
|
while (bytes_available)
|
|
{
|
|
if (bytes_available < 8)
|
|
{
|
|
info_found = NOT_FOUND;
|
|
return READ_NOT_FOUND;
|
|
}
|
|
uint32_t bytes_read;
|
|
riff_chunk chunk;
|
|
int ret = ReadChunk(reader, &chunk, info_found, &bytes_read);
|
|
if (ret)
|
|
return ret;
|
|
|
|
bytes_available -= bytes_read;
|
|
if (bytes_available < chunk.size)
|
|
{
|
|
info_found = PARSE_ERROR;
|
|
return READ_INVALID_DATA;
|
|
}
|
|
switch(chunk.id)
|
|
{
|
|
case 'TSIL': // list chunk
|
|
switch(chunk.type)
|
|
{
|
|
case 'lrdh': // parse this if we havn't already
|
|
if (header_list_parsed != PARSED)
|
|
{
|
|
ret = ParseHeaderList(chunk.size, &bytes_read);
|
|
if (ret)
|
|
return ret;
|
|
bytes_available -= bytes_read;
|
|
header_list_parsed = PARSED;
|
|
}
|
|
else
|
|
{
|
|
ret = SkipChunk(reader, &chunk, info_found, &bytes_read);
|
|
if (ret)
|
|
return ret;
|
|
bytes_available -= bytes_read;
|
|
}
|
|
break;
|
|
case 'OFNI': // INFO
|
|
if (!info)
|
|
{
|
|
info = new nsavi::Info();
|
|
if (!info)
|
|
{
|
|
info_found = PARSE_ERROR;
|
|
return READ_OUT_OF_MEMORY;
|
|
}
|
|
|
|
ret = info->Read(reader, chunk.size);
|
|
if (ret)
|
|
{
|
|
header_list_parsed = PARSE_ERROR;
|
|
return ret;
|
|
}
|
|
|
|
info_found = PARSED;
|
|
*out_info = info;
|
|
return nsavi::READ_OK;
|
|
}
|
|
else
|
|
{
|
|
ret = SkipChunk(reader, &chunk, info_found, &bytes_read);
|
|
if (ret)
|
|
return ret;
|
|
bytes_available -= bytes_read;
|
|
}
|
|
break;
|
|
default: // skip anything we don't understand
|
|
ret = SkipChunk(reader, &chunk, info_found, &bytes_read);
|
|
if (ret)
|
|
return ret;
|
|
bytes_available -= bytes_read;
|
|
break;
|
|
}
|
|
|
|
break;
|
|
default: // skip anything we don't understand
|
|
case 'KNUJ': // skip junk chunks
|
|
ret = SkipChunk(reader, &chunk, info_found, &bytes_read);
|
|
if (ret)
|
|
return ret;
|
|
bytes_available -= bytes_read;
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
if (info_found == PARSED)
|
|
{
|
|
*out_info = info;
|
|
return READ_OK;
|
|
}
|
|
|
|
return READ_INVALID_CALL;
|
|
} |