static int read_chd(void *file, int frame, bitmap_yuy16 &bitmap, INT16 *lsound, INT16 *rsound, int &samples)
{
chd_file *chdfile = reinterpret_cast<chd_file *>(file);
// loop over fields
int interlace_factor = chdinterlaced ? 2 : 1;
samples = 0;
for (int fieldnum = 0; fieldnum < interlace_factor; fieldnum++)
{
// make a fake bitmap for this field
avhuff_decompress_config avconfig;
avconfig.video.wrap(&bitmap.pix16(fieldnum), bitmap.width(), bitmap.height() / interlace_factor, bitmap.rowpixels() * interlace_factor);
// configure the codec
UINT32 numsamples;
avconfig.maxsamples = 48000;
avconfig.actsamples = &numsamples;
avconfig.audio[0] = &lsound[samples];
avconfig.audio[1] = &rsound[samples];
// configure the decompressor for this frame
chdfile->codec_configure(CHD_CODEC_AVHUFF, AVHUFF_CODEC_DECOMPRESS_CONFIG, &avconfig);
// read the frame
chd_error chderr = chdfile->read_hunk(frame * interlace_factor + fieldnum, NULL);
if (chderr != CHDERR_NONE)
return false;
// account for samples read
samples += numsamples;
}
return true;
}
static int read_chd(void *file, int frame, bitmap_yuy16 &bitmap, INT16 *lsound, INT16 *rsound, int *samples)
{
av_codec_decompress_config avconfig;
int interlace_factor = chdinterlaced ? 2 : 1;
bitmap_yuy16 fakebitmap;
UINT32 numsamples;
chd_error chderr;
int fieldnum;
/* loop over fields */
*samples = 0;
for (fieldnum = 0; fieldnum < interlace_factor; fieldnum++)
{
/* make a fake bitmap for this field */
avconfig.video.wrap(&bitmap.pix16(fieldnum), bitmap.width(), bitmap.height() / interlace_factor, bitmap.rowpixels() * interlace_factor);
/* configure the codec */
avconfig.maxsamples = 48000;
avconfig.actsamples = &numsamples;
avconfig.audio[0] = &lsound[*samples];
avconfig.audio[1] = &rsound[*samples];
/* configure the decompressor for this frame */
chd_codec_config((chd_file *)file, AV_CODEC_DECOMPRESS_CONFIG, &avconfig);
/* read the frame */
chderr = chd_read((chd_file *)file, frame * interlace_factor + fieldnum, NULL);
if (chderr != CHDERR_NONE)
return FALSE;
/* account for samples read */
*samples += numsamples;
}
return TRUE;
}
void laserdisc_device::fillbitmap_yuy16(bitmap_yuy16 &bitmap, UINT8 yval, UINT8 cr, UINT8 cb)
{
UINT16 color0 = (yval << 8) | cb;
UINT16 color1 = (yval << 8) | cr;
// write 32 bits of color (2 pixels at a time)
for (int y = 0; y < bitmap.height(); y++)
{
UINT16 *dest = &bitmap.pix16(y);
for (int x = 0; x < bitmap.width() / 2; x++)
{
*dest++ = color0;
*dest++ = color1;
}
}
}
void laserdisc_device::fillbitmap_yuy16(bitmap_yuy16 &bitmap, uint8_t yval, uint8_t cr, uint8_t cb)
{
uint16_t color0 = (yval << 8) | cb;
uint16_t color1 = (yval << 8) | cr;
// write 32 bits of color (2 pixels at a time)
for (int y = 0; y < bitmap.height(); y++)
{
uint16_t *dest = &bitmap.pix16(y);
for (int x = 0; x < bitmap.width() / 2; x++)
{
*dest++ = color0;
*dest++ = color1;
}
}
}
static void verify_video(video_info &video, int frame, bitmap_yuy16 &bitmap)
{
// loop over fields
const int fields_per_frame = 2;
for (int fieldnum = 0; fieldnum < fields_per_frame; fieldnum++)
{
// output status
if (frame % 10 == 0 && fieldnum == 0)
fprintf(stderr, "%6d.%d...\r", frame, fieldnum);
// parse the VBI data
vbi_metadata metadata;
vbi_parse_all(&bitmap.pix16(fieldnum), bitmap.rowpixels() * 2, bitmap.width(), 8, &metadata);
// if we have data in both 17 and 18, it should match
if (metadata.line17 != 0 && metadata.line18 != 0 && metadata.line17 != metadata.line18)
{
printf("%6d.%d: line 17 and 18 data does not match (17=%06X 18=%06X) (WARNING)\n", frame, fieldnum, metadata.line17, metadata.line18);
printf("%6d.%d: selected %06X based on bit confidence\n", frame, fieldnum, metadata.line1718);
}
// is this a lead-in code?
if (metadata.line1718 == VBI_CODE_LEADIN)
{
// if we haven't seen lead-in yet, detect it
if (!video.saw_leadin)
{
video.saw_leadin = TRUE;
printf("%6d.%d: lead-in code detected\n", frame, fieldnum);
}
// if we've previously seen chapters/frames, that's weird
if (video.last_frame != -1 || video.last_chapter != -1)
printf("%6d.%d: lead-in code detected after frame/chapter data (WARNING)\n", frame, fieldnum);
}
// is this a lead-out code?
if (metadata.line1718 == VBI_CODE_LEADOUT)
{
// if we haven't seen lead-in yet, detect it
if (!video.saw_leadout)
{
video.saw_leadout = TRUE;
printf("%6d.%d: lead-out code detected\n", frame, fieldnum);
if (video.last_frame != -1)
printf("%6d.%d: final frame number was %d\n", frame, fieldnum, video.last_frame);
else
printf("%6d.%d: never detected any frame numbers (ERROR)\n", frame, fieldnum);
}
// if we've previously seen chapters/frames, that's weird
if (video.last_frame == -1)
printf("%6d.%d: lead-out code detected with no frames detected beforehand (WARNING)\n", frame, fieldnum);
}
// is this a frame code?
if ((metadata.line1718 & VBI_MASK_CAV_PICTURE) == VBI_CODE_CAV_PICTURE)
{
int framenum = VBI_CAV_PICTURE(metadata.line1718);
// did we see any leadin?
if (!video.saw_leadin)
{
printf("%6d.%d: detected frame number but never saw any lead-in (WARNING)\n", frame, fieldnum);
video.saw_leadin = TRUE;
}
// if this is the first frame, make sure it's 1
if (video.last_frame == -1)
{
if (framenum == 0)
printf("%6d.%d: detected frame 0\n", frame, fieldnum);
else if (framenum == 1)
printf("%6d.%d: detected frame 1\n", frame, fieldnum);
else
printf("%6d.%d: first frame number is not 0 or 1 (%d) (ERROR)\n", frame, fieldnum, framenum);
}
// print an update every 10000 frames
if (framenum != 0 && framenum % 10000 == 0)
printf("%6d.%d: detected frame %d\n", frame, fieldnum, framenum);
// if this frame is not consecutive, it's an error
if (video.last_frame != -1 && framenum != video.last_frame + 1)
printf("%6d.%d: gap in frame number sequence (%d->%d) (ERROR)\n", frame, fieldnum, video.last_frame, framenum);
// remember the frame number
video.last_frame = framenum;
// if we've seen a white flag before, but it's not here, warn
if (video.first_whitefield != -1 && !metadata.white)
printf("%6d.%d: detected frame number but no white flag (WARNING)\n", frame, fieldnum);
}
// is the whiteflag set?
int field = frame * fields_per_frame + fieldnum;
if (metadata.white)
{
// if this is the first white flag we see, count it
if (video.first_whitefield == -1)
{
video.first_whitefield = field;
printf("%6d.%d: first white flag seen\n", frame, fieldnum);
}
// if we've seen frame numbers before, but not here, warn
if (video.last_frame != -1 && (metadata.line1718 & VBI_MASK_CAV_PICTURE) != VBI_CODE_CAV_PICTURE)
printf("%6d.%d: detected white flag but no frame number (WARNING)\n", frame, fieldnum);
}
// if this is the start of a frame, handle cadence
if (metadata.white || (metadata.line1718 & VBI_MASK_CAV_PICTURE) == VBI_CODE_CAV_PICTURE)
{
// if we've seen frames, but we're not yet to the lead-out, check the cadence
if (video.last_frame != -1 && !video.saw_leadout)
{
// make sure we have a proper history
if (video.prev_whitefield != -1)
video.cadence_history = (video.cadence_history << 4) | ((field - video.prev_whitefield) & 0x0f);
video.prev_whitefield = field;
// if we don't know our cadence yet, determine it
if (video.cadence == -1 && (video.cadence_history & 0xf00) != 0)
{
if ((video.cadence_history & 0xfff) == 0x222)
{
printf("%6d.%d: detected 2:2 cadence\n", frame, fieldnum);
video.cadence = 4;
}
else if ((video.cadence_history & 0xfff) == 0x323)
{
printf("%6d.%d: detected 3:2 cadence\n", frame, fieldnum);
video.cadence = 5;
}
else if ((video.cadence_history & 0xfff) == 0x232)
{
printf("%6d.%d: detected 2:3 cadence\n", frame, fieldnum);
video.cadence = 5;
}
else
{
printf("%6d.%d: unknown cadence (history %d:%d:%d) (WARNING)\n", frame, fieldnum,
(video.cadence_history >> 8) & 15, (video.cadence_history >> 4) & 15, video.cadence_history & 15);
}
}
// if we know our cadence, make sure we stick to it
if (video.cadence != -1)
{
if (video.cadence == 4 && (video.cadence_history & 0xfff) != 0x222)
{
printf("%6d.%d: missed cadence (history %d:%d:%d) (WARNING)\n", frame, fieldnum,
(video.cadence_history >> 8) & 15, (video.cadence_history >> 4) & 15, video.cadence_history & 15);
video.cadence = -1;
video.cadence_history = 0;
}
else if (video.cadence == 5 && (video.cadence_history & 0xfff) != 0x323 && (video.cadence_history & 0xfff) != 0x232)
{
printf("%6d.%d: missed cadence (history %d:%d:%d) (WARNING)\n", frame, fieldnum,
(video.cadence_history >> 8) & 15, (video.cadence_history >> 4) & 15, video.cadence_history & 15);
video.cadence = -1;
video.cadence_history = 0;
}
}
}
