1 files changed, 167 insertions, 0 deletions

diff --git a/core/multimedia/opieplayer/libmpeg3/bitstream.c b/core/multimedia/opieplayer/libmpeg3/bitstream.c
new file mode 100644
index 0000000..b4f46e3
--- a/dev/null
+++ b/core/multimedia/opieplayer/libmpeg3/bitstream.c
@@ -0,0 +1,167 @@
+#include "mpeg3private.h"
+#include "mpeg3protos.h"
+
+#include <stdlib.h>
+
+mpeg3_bits_t* mpeg3bits_new_stream(mpeg3_t *file, mpeg3_demuxer_t *demuxer)
+{
+	mpeg3_bits_t *stream = (mpeg3_bits_t*)malloc(sizeof(mpeg3_bits_t));
+	stream->bfr = 0;
+	stream->bfr_size = 0;
+	stream->bit_number = 0;
+	stream->file = file;
+	stream->demuxer = demuxer;
+	stream->input_ptr = 0;
+	return stream;
+}
+
+int mpeg3bits_delete_stream(mpeg3_bits_t* stream)
+{
+	free(stream);
+	return 0;
+}
+
+
+/* Fill a buffer.  Only works if bit_number is on an 8 bit boundary */
+int mpeg3bits_read_buffer(mpeg3_bits_t* stream, unsigned char *buffer, int bytes)
+{
+	int result, i = 0;
+	while(stream->bit_number > 0)
+	{
+		stream->bit_number -= 8;
+		mpeg3demux_read_prev_char(stream->demuxer);
+	}
+
+	stream->bit_number = 0;
+	stream->bfr_size = 0;
+	stream->bfr = 0;
+	result = mpeg3demux_read_data(stream->demuxer, buffer, bytes);
+	return result;
+}
+
+/* For mp3 decompression use a pointer in a buffer for getbits. */
+int mpeg3bits_use_ptr(mpeg3_bits_t* stream, unsigned char *buffer)
+{
+	stream->bfr_size = stream->bit_number = 0;
+	stream->bfr = 0;
+	stream->input_ptr = buffer;
+	return 0;
+}
+
+/* Go back to using the demuxer for getbits in mp3. */
+int mpeg3bits_use_demuxer(mpeg3_bits_t* stream)
+{
+	if(stream->input_ptr)
+	{
+		stream->bfr_size = stream->bit_number = 0;
+		stream->input_ptr = 0;
+		stream->bfr = 0;
+	}
+
+	return 0;
+}
+
+/* Reconfigure for reverse operation */
+/* Default is forward operation */
+void mpeg3bits_start_reverse(mpeg3_bits_t* stream)
+{
+	int i;
+	for(i = 0; i < stream->bfr_size; i += 8)
+		if(stream->input_ptr)
+			stream->input_ptr--;
+		else
+			mpeg3demux_read_prev_char(stream->demuxer);
+}
+
+/* Reconfigure for forward operation */
+void mpeg3bits_start_forward(mpeg3_bits_t* stream)
+{
+	int i;
+	for(i = 0; i < stream->bfr_size; i += 8)
+		if(stream->input_ptr)
+			stream->input_ptr++;
+		else
+			mpeg3demux_read_char(stream->demuxer);
+}
+
+/* Erase the buffer with the next 4 bytes in the file. */
+int mpeg3bits_refill(mpeg3_bits_t* stream)
+{
+	stream->bit_number = 32;
+	stream->bfr_size = 32;
+
+	if(stream->input_ptr)
+	{
+		stream->bfr = (unsigned int)(*stream->input_ptr++) << 24;
+		stream->bfr |= (unsigned int)(*stream->input_ptr++) << 16;
+		stream->bfr |= (unsigned int)(*stream->input_ptr++) << 8;
+		stream->bfr |= *stream->input_ptr++;
+	}
+	else
+	{
+		stream->bfr = mpeg3demux_read_char(stream->demuxer) << 24;
+		stream->bfr |= mpeg3demux_read_char(stream->demuxer) << 16;
+		stream->bfr |= mpeg3demux_read_char(stream->demuxer) << 8;
+		stream->bfr |= mpeg3demux_read_char(stream->demuxer);
+	}
+	return mpeg3demux_eof(stream->demuxer);
+}
+
+/* Erase the buffer with the previous 4 bytes in the file. */
+int mpeg3bits_refill_backwards(mpeg3_bits_t* stream)
+{
+	stream->bit_number = 0;
+	stream->bfr_size = 32;
+	stream->bfr = mpeg3demux_read_prev_char(stream->demuxer);
+	stream->bfr |= (unsigned int)mpeg3demux_read_prev_char(stream->demuxer) << 8;
+	stream->bfr |= (unsigned int)mpeg3demux_read_prev_char(stream->demuxer) << 16;
+	stream->bfr |= (unsigned int)mpeg3demux_read_prev_char(stream->demuxer) << 24;
+	return mpeg3demux_eof(stream->demuxer);
+}
+
+int mpeg3bits_byte_align(mpeg3_bits_t *stream)
+{
+	stream->bit_number = (stream->bit_number + 7) & 0xf8;
+	return 0;
+}
+
+int mpeg3bits_seek_end(mpeg3_bits_t* stream)
+{
+	stream->bfr_size = stream->bit_number = 0;
+	return mpeg3demux_seek_byte(stream->demuxer, mpeg3demuxer_total_bytes(stream->demuxer));
+}
+
+int mpeg3bits_seek_start(mpeg3_bits_t* stream)
+{
+	stream->bfr_size = stream->bit_number = 0;
+	return mpeg3demux_seek_byte(stream->demuxer, 0);
+}
+
+int mpeg3bits_seek_time(mpeg3_bits_t* stream, double time_position)
+{
+	stream->bfr_size = stream->bit_number = 0;
+	return mpeg3demux_seek_time(stream->demuxer, time_position);
+}
+
+int mpeg3bits_seek_byte(mpeg3_bits_t* stream, long position)
+{
+	stream->bfr_size = stream->bit_number = 0;
+	return mpeg3demux_seek_byte(stream->demuxer, position);
+}
+
+int mpeg3bits_seek_percentage(mpeg3_bits_t* stream, double percentage)
+{
+	stream->bfr_size = stream->bit_number = 0;
+	return mpeg3demux_seek_percentage(stream->demuxer, percentage);
+}
+
+int mpeg3bits_tell(mpeg3_bits_t* stream)
+{
+	return mpeg3demux_tell(stream->demuxer);
+}
+
+int mpeg3bits_getbitoffset(mpeg3_bits_t *stream)
+{
+	return stream->bit_number & 7;
+}
+