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#include "debug.h"
#include "input_speex.h"
namespace audiere {
class FileReader : public speexfile::Reader {
private:
FilePtr m_file;
bool m_seekable;
public:
FileReader(FilePtr file) {
m_file = file;
// Hacky test to see whether we can seek in the file.
m_seekable = m_file->seek(0, File::BEGIN);
}
int read(void* ptr, int size) {
return m_file->read(ptr, size);
}
speexfile::offset_t seek(speexfile::offset_t offset) {
m_file->seek(static_cast<int>(offset), File::BEGIN);
return get_position();
}
speexfile::offset_t get_position() {
return m_file->tell();
}
speexfile::offset_t get_length() {
speexfile::offset_t c = get_position();
m_file->seek(0, File::END);
speexfile::offset_t l = get_position();
m_file->seek(static_cast<int>(c), File::BEGIN);
return l;
}
bool can_seek() {
return m_seekable;
}
};
SpeexInputStream::SpeexInputStream() {
m_speexfile = 0;
m_position = 0;
}
SpeexInputStream::~SpeexInputStream() {
delete m_speexfile;
}
/// @todo this really should be replaced with a factory function
bool
SpeexInputStream::initialize(FilePtr file) {
#if defined(_MSC_VER) && (_MSC_VER <= 1200)
m_reader = std::auto_ptr<speexfile::Reader>(new FileReader(file));
#else
m_reader.reset(new FileReader(file));
#endif
m_speexfile = new speexfile::speexfile(m_reader.get());
// @todo How should we handle files with multiple streams?
if (m_speexfile->get_streams() != 1) {
delete m_speexfile;
m_speexfile = 0;
return false;
}
speexfile::int32_t rate = m_speexfile->stream_get_samplerate();
speexfile::int32_t channels = m_speexfile->stream_get_channels();
if (rate == 0 || channels == 0) {
delete m_speexfile;
m_speexfile = 0;
return false;
}
for (int i = 0; i < m_speexfile->stream_get_tagcount(); ++i) {
const speexfile::speextags* tag = m_speexfile->stream_get_tags()[i];
addTag(
tag->item ? tag->item : "",
tag->value ? tag->value : "",
"Speex");
}
return true;
}
void
SpeexInputStream::getFormat(
int& channel_count,
int& sample_rate,
SampleFormat& sample_format)
{
channel_count = m_speexfile->stream_get_channels();
sample_rate = m_speexfile->stream_get_samplerate();
sample_format = SF_S16;
}
int
SpeexInputStream::doRead(int frame_count, void* buffer) {
s16* out = (s16*)buffer;
int total_read = 0;
while (frame_count > 0) {
// If the buffer is empty, decode a little from the speex file.
if (m_read_buffer.getSize() == 0) {
float decode_buffer[2000]; // Size defined by speexfile API.
int speex_read = m_speexfile->decode(decode_buffer);
if (speex_read == 0) {
break;
}
m_read_buffer.write(decode_buffer, speex_read * sizeof(float));
}
const int BUFFER_SIZE = 1024;
float read_buffer[BUFFER_SIZE];
int should_read = std::min(frame_count, BUFFER_SIZE);
int actual_read = m_read_buffer.read(read_buffer, should_read * sizeof(float)) / sizeof(float);
ADR_ASSERT(actual_read != 0, "Read queue should have data");
for (int i = 0; i < actual_read; ++i) {
out[i] = s16(read_buffer[i] * 32767);
}
frame_count -= actual_read;
total_read += actual_read;
out += actual_read;
}
m_position += total_read;
return total_read;
}
void
SpeexInputStream::reset() {
setPosition(0); // need to update m_position
}
bool
SpeexInputStream::isSeekable() {
return true;
}
int
SpeexInputStream::getLength() {
return static_cast<int>(m_speexfile->get_samples());
}
void
SpeexInputStream::setPosition(int position) {
m_speexfile->seek_sample(position);
m_position = position;
}
int
SpeexInputStream::getPosition() {
return m_position;
}
}
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