[media] pwc: Remove dead snapshot code

The in kernel version of the pwc driver has never supported snapshot
mode, and now that we no longer support the pixfmt.priv abuse there also
no longer is a way for userspace to request it, rendering all the code in
question dead (never called), so remove it.

Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

1 files changed, 27 insertions, 248 deletions

diff --git a/drivers/media/video/pwc/pwc-dec23.c b/drivers/media/video/pwc/pwc-dec23.c
index 740bf6b9e8e9..bce3d9bfd035 100644
--- a/drivers/media/video/pwc/pwc-dec23.c
+++ b/drivers/media/video/pwc/pwc-dec23.c
@@ -51,13 +51,6 @@
 # define USE_LOOKUP_TABLE_TO_CLAMP 1
 #endif
 
-/*
- * ENABLE_BAYER_DECODER
- *   0: bayer decoder is not build (save some space)
- *   1: bayer decoder is build and can be used
- */
-#define ENABLE_BAYER_DECODER 0
-
 static void build_subblock_pattern(struct pwc_dec23_private *pdec)
 {
 	static const unsigned int initial_values[12] = {
@@ -469,123 +462,6 @@ static void copy_image_block_CrCb(const int *src, unsigned char *dst, unsigned i
 #endif
 }
 
-#if ENABLE_BAYER_DECODER
-/*
- * Format: 8x2 pixels
- *   . G . G . G . G . G . G . G
- *   . . . . . . . . . . . . . .
- *   . G . G . G . G . G . G . G
- *   . . . . . . . . . . . . . .
- *   or
- *   . . . . . . . . . . . . . .
- *   G . G . G . G . G . G . G .
- *   . . . . . . . . . . . . . .
- *   G . G . G . G . G . G . G .
-*/
-static void copy_image_block_Green(const int *src, unsigned char *dst, unsigned int bytes_per_line, unsigned int scalebits)
-{
-#if UNROLL_LOOP_FOR_COPY
-	/* Unroll all loops */
-	const unsigned char *cm = pwc_crop_table+MAX_OUTER_CROP_VALUE;
-	unsigned char *d = dst;
-	const int *c = src;
-
-	d[0] = cm[c[0] >> scalebits];
-	d[2] = cm[c[1] >> scalebits];
-	d[4] = cm[c[2] >> scalebits];
-	d[6] = cm[c[3] >> scalebits];
-	d[8] = cm[c[4] >> scalebits];
-	d[10] = cm[c[5] >> scalebits];
-	d[12] = cm[c[6] >> scalebits];
-	d[14] = cm[c[7] >> scalebits];
-
-	d = dst + bytes_per_line;
-	d[0] = cm[c[8] >> scalebits];
-	d[2] = cm[c[9] >> scalebits];
-	d[4] = cm[c[10] >> scalebits];
-	d[6] = cm[c[11] >> scalebits];
-	d[8] = cm[c[12] >> scalebits];
-	d[10] = cm[c[13] >> scalebits];
-	d[12] = cm[c[14] >> scalebits];
-	d[14] = cm[c[15] >> scalebits];
-#else
-	int i;
-	unsigned char *d;
-	const int *c = src;
-
-	d = dst;
-	for (i = 0; i < 8; i++, c++)
-		d[i*2] = CLAMP((*c) >> scalebits);
-
-	d = dst + bytes_per_line;
-	for (i = 0; i < 8; i++, c++)
-		d[i*2] = CLAMP((*c) >> scalebits);
-#endif
-}
-#endif
-
-#if ENABLE_BAYER_DECODER
-/*
- * Format: 4x4 pixels
- *   R . R . R . R
- *   . B . B . B .
- *   R . R . R . R
- *   . B . B . B .
- */
-static void copy_image_block_RedBlue(const int *src, unsigned char *dst, unsigned int bytes_per_line, unsigned int scalebits)
-{
-#if UNROLL_LOOP_FOR_COPY
-	/* Unroll all loops */
-	const unsigned char *cm = pwc_crop_table+MAX_OUTER_CROP_VALUE;
-	unsigned char *d = dst;
-	const int *c = src;
-
-	d[0] = cm[c[0] >> scalebits];
-	d[2] = cm[c[1] >> scalebits];
-	d[4] = cm[c[2] >> scalebits];
-	d[6] = cm[c[3] >> scalebits];
-
-	d = dst + bytes_per_line;
-	d[1] = cm[c[4] >> scalebits];
-	d[3] = cm[c[5] >> scalebits];
-	d[5] = cm[c[6] >> scalebits];
-	d[7] = cm[c[7] >> scalebits];
-
-	d = dst + bytes_per_line*2;
-	d[0] = cm[c[8] >> scalebits];
-	d[2] = cm[c[9] >> scalebits];
-	d[4] = cm[c[10] >> scalebits];
-	d[6] = cm[c[11] >> scalebits];
-
-	d = dst + bytes_per_line*3;
-	d[1] = cm[c[12] >> scalebits];
-	d[3] = cm[c[13] >> scalebits];
-	d[5] = cm[c[14] >> scalebits];
-	d[7] = cm[c[15] >> scalebits];
-#else
-	int i;
-	unsigned char *d;
-	const int *c = src;
-
-	d = dst;
-	for (i = 0; i < 4; i++, c++)
-		d[i*2] = CLAMP((*c) >> scalebits);
-
-	d = dst + bytes_per_line;
-	for (i = 0; i < 4; i++, c++)
-		d[i*2+1] = CLAMP((*c) >> scalebits);
-
-	d = dst + bytes_per_line*2;
-	for (i = 0; i < 4; i++, c++)
-		d[i*2] = CLAMP((*c) >> scalebits);
-
-	d = dst + bytes_per_line*3;
-	for (i = 0; i < 4; i++, c++)
-		d[i*2+1] = CLAMP((*c) >> scalebits);
-#endif
-}
-#endif
-
 /*
  * To manage the stream, we keep bits in a 32 bits register.
  * fill_nbits(n): fill the reservoir with at least n bits
@@ -777,71 +653,6 @@ static void DecompressBand23(struct pwc_dec23_private *pdec,
 
 }
 
-#if ENABLE_BAYER_DECODER
-/*
- * Size need to be a multiple of 8 in width
- *
- * Return a block of four line encoded like this:
- *
- *   G R G R G R G R G R G R G R G R
- *   B G B G B G B G B G B G B G B G
- *   G R G R G R G R G R G R G R G R
- *   B G B G B G B G B G B G B G B G
- *
- */
-static void DecompressBandBayer(struct pwc_dec23_private *pdec,
-				const unsigned char *rawyuv,
-				unsigned char *rgbbayer,
-				unsigned int   compressed_image_width,
-				unsigned int   real_image_width)
-{
-	int compression_index, nblocks;
-	const unsigned char *ptable0004;
-	const unsigned char *ptable8004;
-	unsigned char *dest;
-
-	pdec->reservoir = 0;
-	pdec->nbits_in_reservoir = 0;
-	pdec->stream = rawyuv + 1;	/* The first byte of the stream is skipped */
-
-	get_nbits(pdec, 4, compression_index);
-
-	/* pass 1: uncompress RB component */
-	nblocks = compressed_image_width / 4;
-
-	ptable0004 = pdec->table_0004_pass1[compression_index];
-	ptable8004 = pdec->table_8004_pass1[compression_index];
-	dest = rgbbayer;
-
-	/* Each block decode a square of 4x4 */
-	while (nblocks) {
-		decode_block(pdec, ptable0004, ptable8004);
-		copy_image_block_RedBlue(pdec->temp_colors, rgbbayer, real_image_width, pdec->scalebits);
-		dest += 8;
-		nblocks--;
-	}
-
-	/* pass 2: uncompress G component */
-	nblocks = compressed_image_width / 8;
-
-	ptable0004 = pdec->table_0004_pass2[compression_index];
-	ptable8004 = pdec->table_8004_pass2[compression_index];
-
-	/* Each block decode a square of 4x4 */
-	while (nblocks) {
-		decode_block(pdec, ptable0004, ptable8004);
-		copy_image_block_Green(pdec->temp_colors, rgbbayer+1, real_image_width, pdec->scalebits);
-
-		decode_block(pdec, ptable0004, ptable8004);
-		copy_image_block_Green(pdec->temp_colors, rgbbayer+real_image_width, real_image_width, pdec->scalebits);
-
-		rgbbayer += 16;
-		nblocks -= 2;
-	}
-}
-#endif
-
-
 /**
  *
  * Uncompress a pwc23 buffer.
@@ -852,76 +663,44 @@ static void DecompressBandBayer(struct pwc_dec23_private *pdec,
  *
  * src: raw data
  * dst: image output
- * flags: PWCX_FLAG_PLANAR or PWCX_FLAG_BAYER
  */
 void pwc_dec23_decompress(const struct pwc_device *pwc,
 			  const void *src,
-			  void *dst,
-			  int flags)
+			  void *dst)
 {
 	int bandlines_left, stride, bytes_per_block;
 	struct pwc_dec23_private *pdec = pwc->decompress_data;
 
+	/* YUV420P image format */
+	unsigned char *pout_planar_y;
+	unsigned char *pout_planar_u;
+	unsigned char *pout_planar_v;
+	unsigned int   plane_size;
+
 	mutex_lock(&pdec->lock);
 
 	bandlines_left = pwc->image.y / 4;
 	bytes_per_block = pwc->view.x * 4;
-
-	if (flags & PWCX_FLAG_BAYER) {
-#if ENABLE_BAYER_DECODER
-		/* RGB Bayer format */
-		unsigned char *rgbout;
-
-		stride = pwc->view.x * pwc->offset.y;
-		rgbout = dst + stride + pwc->offset.x;
-
-
-		while (bandlines_left--) {
-
-			DecompressBandBayer(pwc->decompress_data,
-					    src,
-					    rgbout,
-					    pwc->image.x, pwc->view.x);
-
-			src += pwc->vbandlength;
-			rgbout += bytes_per_block;
-
-		}
-#else
-		memset(dst, 0, pwc->view.x * pwc->view.y);
-#endif
-
-	} else {
-		/* YUV420P image format */
-		unsigned char *pout_planar_y;
-		unsigned char *pout_planar_u;
-		unsigned char *pout_planar_v;
-		unsigned int   plane_size;
-
-		plane_size = pwc->view.x * pwc->view.y;
-
-		/* offset in Y plane */
-		stride = pwc->view.x * pwc->offset.y;
-		pout_planar_y = dst + stride + pwc->offset.x;
-
-		/* offsets in U/V planes */
-		stride = (pwc->view.x * pwc->offset.y) / 4 + pwc->offset.x / 2;
-		pout_planar_u = dst + plane_size + stride;
-		pout_planar_v = dst + plane_size + plane_size / 4 + stride;
-
-		while (bandlines_left--) {
-
-			DecompressBand23(pwc->decompress_data,
-					 src,
-					 pout_planar_y, pout_planar_u, pout_planar_v,
-					 pwc->image.x, pwc->view.x);
-			src += pwc->vbandlength;
-			pout_planar_y += bytes_per_block;
-			pout_planar_u += pwc->view.x;
-			pout_planar_v += pwc->view.x;
-
-		}
+	plane_size = pwc->view.x * pwc->view.y;
+
+	/* offset in Y plane */
+	stride = pwc->view.x * pwc->offset.y;
+	pout_planar_y = dst + stride + pwc->offset.x;
+
+	/* offsets in U/V planes */
+	stride = (pwc->view.x * pwc->offset.y) / 4 + pwc->offset.x / 2;
+	pout_planar_u = dst + plane_size + stride;
+	pout_planar_v = dst + plane_size + plane_size / 4 + stride;
+
+	while (bandlines_left--) {
+		DecompressBand23(pwc->decompress_data,
+				 src,
+				 pout_planar_y, pout_planar_u, pout_planar_v,
+				 pwc->image.x, pwc->view.x);
+		src += pwc->vbandlength;
+		pout_planar_y += bytes_per_block;
+		pout_planar_u += pwc->view.x;
+		pout_planar_v += pwc->view.x;
 	}
-
 	mutex_unlock(&pdec->lock);
 }