int parse_c63_frame(struct c63_common *cm)
{
// SOI
if (get_byte(cm->e_ctx.fp) != JPEG_DEF_MARKER ||
get_byte(cm->e_ctx.fp) != JPEG_SOI_MARKER)
{
fprintf(stderr, "Not an JPEG file\n");
exit(EXIT_FAILURE);
}
while(1)
{
int c;
c = get_byte(cm->e_ctx.fp);
if (c == 0) { c = get_byte(cm->e_ctx.fp); }
if (c != JPEG_DEF_MARKER)
{
fprintf(stderr, "Expected marker.\n");
exit(EXIT_FAILURE);
}
uint8_t marker = get_byte(cm->e_ctx.fp);
if (marker == JPEG_DQT_MARKER)
{
parse_dqt(cm);
}
else if (marker == JPEG_SOS_MARKER)
{
parse_sos(cm);
read_interleaved_data(cm);
cm->e_ctx.bit_buffer = cm->e_ctx.bit_buffer_width = 0;
}
else if (marker == JPEG_SOF_MARKER)
{
parse_sof0(cm);
}
else if (marker == JPEG_DHT_MARKER)
{
parse_dht(cm);
}
else if (marker == JPEG_EOI_MARKER)
{
return 1;
}
else
{
fprintf(stderr, "Invalid marker: 0x%02x\n", marker);
exit(EXIT_FAILURE);
}
}
return 1;
}
int parse_c63_frame(struct c63_common *cm)
{
// SOI
if (get_byte(cm->e_ctx.fp) != MARKER_START || get_byte(cm->e_ctx.fp) != MARKER_SOI)
{
fprintf(stderr, "Not an JPEG file\n");
exit(1);
}
while(1)
{
int c;
c = get_byte(cm->e_ctx.fp);
if (c == 0)
c = get_byte(cm->e_ctx.fp);
if (c != MARKER_START)
{
fprintf(stderr, "Expected marker.\n");
exit(1);
}
uint8_t marker = get_byte(cm->e_ctx.fp);
if (marker == MARKER_DQT)
parse_dqt(cm);
else if (marker == MARKER_SOS) {
parse_sos(cm);
read_interleaved_data(cm);
cm->e_ctx.bit_buffer = cm->e_ctx.bit_buffer_width = 0;
}
else if (marker == MARKER_SOF0)
parse_sof0(cm);
else if (marker == MARKER_DHT)
parse_dht(cm);
else if (marker == MARKER_EOI)
return 1;
else
{
fprintf(stderr, "Invalid marker: 0x%02x\n", marker);
exit(1);
}
}
return 1;
}